chore: Cleanup CI (#1117)

* Standardise names
* Update actions versions
* Update parameter handling
* Split jobs into steps

---------

Co-authored-by: kaiserd <1684595+kaiserd@users.noreply.github.com>

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# Formatted with nph 0.5.1
+dc83a1e9b68f00b3be7e09febdb1a3f877321b9a

.github/actions/install_nim/action.yml

@@ -61,7 +61,7 @@ runs:
     - name: Restore Nim DLLs dependencies (Windows) from cache
       if: inputs.os == 'Windows'
       id: windows-dlls-cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: external/dlls
         key: 'dlls'
@@ -114,7 +114,7 @@ runs:
 
     - name: Restore Nim from cache
       id: nim-cache
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: '${{ github.workspace }}/nim'
         key: ${{ inputs.os }}-${{ inputs.cpu }}-nim-${{ inputs.nim_branch }}-cache-${{ env.cache_nonce }}

.github/workflows/bumper.yml

@@ -1,43 +0,0 @@
-name: Bumper
-on:
-  push:
-    branches:
-      - unstable
-      - bumper
-  workflow_dispatch:
-
-jobs:
-  bumpProjects:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        target: [
-          { repo: status-im/nimbus-eth2, branch: unstable },
-          { repo: status-im/nwaku, branch: master },
-          { repo: status-im/nim-codex, branch: main }
-        ]
-    steps:
-      - name: Clone repo
-        uses: actions/checkout@v2
-        with:
-          repository: ${{ matrix.target.repo }}
-          ref: ${{ matrix.target.branch }}
-          path: nbc
-          submodules: true
-          fetch-depth: 0
-          token:  ${{ secrets.ACTIONS_GITHUB_TOKEN }}
-
-      - name: Checkout this ref
-        run: |
-          cd nbc/vendor/nim-libp2p
-          git checkout $GITHUB_SHA
-
-      - name: Commit this bump
-        run: |
-          cd nbc
-          git config --global user.email "${{ github.actor }}@users.noreply.github.com"
-          git config --global user.name = "${{ github.actor }}"
-          git commit -a -m "auto-bump nim-libp2p"
-          git branch -D nim-libp2p-auto-bump-${GITHUB_REF##*/} || true
-          git switch -c nim-libp2p-auto-bump-${GITHUB_REF##*/}
-          git push -f origin nim-libp2p-auto-bump-${GITHUB_REF##*/}

.github/workflows/ci.yml

@@ -1,9 +1,9 @@
-name: CI
+name: Continuous Integration
+
 on:
   push:
     branches:
       - master
-      - unstable
   pull_request:
   workflow_dispatch:
 
@@ -12,60 +12,67 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  build:
+  test:
     timeout-minutes: 90
     strategy:
       fail-fast: false
       matrix:
-        target:
+        platform:
           - os: linux
             cpu: amd64
           - os: linux
             cpu: i386
+          - os: linux-gcc-14
+            cpu: amd64
           - os: macos
             cpu: amd64
           - os: windows
             cpu: amd64
-          #- os: windows
-            #cpu: i386
-        branch: [version-1-2, version-1-6]
+        nim: 
+          - branch: version-1-6
+            memory_management: refc
+          - branch: version-2-0
+            memory_management: refc
         include:
-          - target:
+          - platform:
               os: linux
-            builder: ubuntu-20.04
+            builder: ubuntu-22.04
             shell: bash
-          - target:
+          - platform:
+              os: linux-gcc-14
+            builder: ubuntu-24.04
+            shell: bash
+          - platform:
               os: macos
-            builder: macos-12
+            builder: macos-13
             shell: bash
-          - target:
+          - platform:
               os: windows
-            builder: windows-2019
+            builder: windows-2022
             shell: msys2 {0}
 
     defaults:
       run:
         shell: ${{ matrix.shell }}
 
-    name: '${{ matrix.target.os }}-${{ matrix.target.cpu }} (Nim ${{ matrix.branch }})'
+    name: '${{ matrix.platform.os }}-${{ matrix.platform.cpu }} (Nim ${{ matrix.nim.branch }})'
     runs-on: ${{ matrix.builder }}
-    continue-on-error: ${{ matrix.branch == 'devel' }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: true
 
       - name: Setup Nim
         uses: "./.github/actions/install_nim"
         with:
-          os: ${{ matrix.target.os }}
-          cpu: ${{ matrix.target.cpu }}
+          os: ${{ matrix.platform.os }}
+          cpu: ${{ matrix.platform.cpu }}
           shell: ${{ matrix.shell }}
-          nim_branch: ${{ matrix.branch }}
+          nim_branch: ${{ matrix.nim.branch }}
 
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v5
         with:
           go-version: '~1.15.5'
 
@@ -78,15 +85,28 @@ jobs:
         uses: actions/cache@v3
         with:
           path: nimbledeps
-          key: nimbledeps-${{ hashFiles('.pinned') }}
+          # Using nim.branch as a simple way to differentiate between nimble using the "pkgs" or "pkgs2" directories.
+          # The change happened on Nimble v0.14.0.
+          key: nimbledeps-${{ matrix.nim.branch }}-${{ hashFiles('.pinned') }} # hashFiles returns a different value on windows
 
       - name: Install deps
         if: ${{ steps.deps-cache.outputs.cache-hit != 'true' }}
         run: |
           nimble install_pinned
 
+      - name: Use gcc 14
+        if : ${{ matrix.platform.os == 'linux-gcc-14'}}
+        run: |
+          # Add GCC-14 to alternatives
+          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 14
+
+          # Set GCC-14 as the default
+          sudo update-alternatives --set gcc /usr/bin/gcc-14
+
       - name: Run tests
         run: |
           nim --version
           nimble --version
+          gcc --version
+          NIMFLAGS="${NIMFLAGS} --mm:${{ matrix.nim.memory_management }}"
           nimble test

.github/workflows/coverage.yml

@@ -1,11 +1,10 @@
-name: nim-libp2p codecov builds
+name: Coverage
 
 on:
-  #On push to common branches, this computes the "bases stats" for PRs
+  # On push to common branches, this computes the coverage that PRs will use for diff
   push:
     branches:
       - master
-      - unstable
   pull_request:
   workflow_dispatch:
 
@@ -14,12 +13,13 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  Coverage:
-    runs-on: ubuntu-20.04
+  codecov:
+    name: Run coverage and upload to codecov
+    runs-on: ubuntu-22.04
     env:
       CICOV: YES
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -32,7 +32,7 @@ jobs:
 
       - name: Restore deps from cache
         id: deps-cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: nimbledeps
           key: nimbledeps-${{ hashFiles('.pinned') }}
@@ -42,24 +42,28 @@ jobs:
         run: |
           nimble install_pinned
 
-      - name: Run
+      - name: Setup coverage
         run: |
           sudo apt-get update
           sudo apt-get install -y lcov build-essential git curl
           mkdir coverage
+
+      - name: Run test suite with coverage flags
+        run: |
           export NIMFLAGS="--lineDir:on --passC:-fprofile-arcs --passC:-ftest-coverage --passL:-fprofile-arcs --passL:-ftest-coverage"
           nimble testnative
           nimble testpubsub
           nimble testfilter
+
+      - name: Run coverage
+        run: |
           find nimcache -name *.c -delete
           lcov --capture --directory nimcache --output-file coverage/coverage.info
           shopt -s globstar
           ls `pwd`/libp2p/{*,**/*}.nim
           lcov --extract coverage/coverage.info  `pwd`/libp2p/{*,**/*}.nim --output-file coverage/coverage.f.info
           genhtml coverage/coverage.f.info --output-directory coverage/output
-          bash <(curl -s https://codecov.io/bash) -f coverage/coverage.f.info || echo "Codecov did not collect coverage reports"
 
-          #- uses: actions/upload-artifact@master
-          #  with:
-          #    name: coverage
-          #    path: coverage
+      - name: Upload coverage to codecov
+        run: |
+          bash <(curl -s https://codecov.io/bash) -f coverage/coverage.f.info || echo "Codecov did not collect coverage reports"

.github/workflows/daily_amd64.yml

@@ -0,0 +1,14 @@
+name: Daily amd64
+
+on:
+  schedule:
+    - cron: "30 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  test_amd64:
+    name: Daily amd64
+    uses: ./.github/workflows/base_daily_tests.yml
+    with:
+      nim: "[{'branch': 'version-1-6', 'memory_management': 'refc'}, {'branch': 'version-2-0', 'memory_management': 'refc'}]"
+      cpu: "['amd64']"

.github/workflows/daily_common.yml

@@ -0,0 +1,89 @@
+name: Daily Common
+# Serves as base workflow for daily tasks, it's not run by itself.
+
+on:
+  workflow_call:
+    inputs:
+      nim:
+        description: 'Nim Configuration'
+        required: true
+        type: string # Following this format: [{"branch": ..., "memory_management": ...}, ...]
+      cpu:
+        description: 'CPU'
+        required: true
+        type: string
+      exclude:
+        description: 'Exclude matrix configurations'
+        required: false
+        type: string
+        default: "[]"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  delete_cache:
+    name: Delete github action's branch cache
+    runs-on: ubuntu-latest
+    steps:
+      - uses: snnaplab/delete-branch-cache-action@v1
+
+  test:
+    needs: delete_cache
+    timeout-minutes: 90
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - os: linux
+            builder: ubuntu-22.04
+            shell: bash
+          - os: macos
+            builder: macos-13
+            shell: bash
+          - os: windows
+            builder: windows-2022
+            shell: msys2 {0}
+        nim: ${{ fromJSON(inputs.nim) }}
+        cpu: ${{ fromJSON(inputs.cpu) }}
+        exclude: ${{ fromJSON(inputs.exclude) }}
+
+    defaults:
+      run:
+        shell: ${{ matrix.platform.shell }}
+
+    name: '${{ matrix.platform.os }}-${{ matrix.cpu }} (Nim ${{ matrix.nim.branch }})'
+    runs-on: ${{ matrix.platform.builder }}
+    continue-on-error: ${{ matrix.nim.branch == 'devel' || matrix.nim.branch == 'version-2-0' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Nim
+        uses: "./.github/actions/install_nim"
+        with:
+          os: ${{ matrix.platform.os }}
+          shell: ${{ matrix.platform.shell }}
+          nim_branch: ${{ matrix.nim.branch }}
+          cpu: ${{ matrix.cpu }}
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '~1.15.5'
+          cache: false
+
+      - name: Install p2pd
+        run: |
+          V=1 bash scripts/build_p2pd.sh p2pdCache 124530a3
+        
+      - name: Install dependencies
+        run: |
+          nimble install -y --depsOnly
+
+      - name: Run tests
+        run: |
+          nim --version
+          nimble --version
+          NIMFLAGS="${NIMFLAGS} --mm:${{ matrix.nim.memory_management }}" nimble test

.github/workflows/daily_devel.yml

@@ -0,0 +1,14 @@
+name: Daily Nim Devel
+
+on:
+  schedule:
+    - cron: "30 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  test_nim_devel:
+    name: Daily Nim Devel
+    uses: ./.github/workflows/base_daily_tests.yml
+    with:
+      nim: "[{'branch': 'devel', 'memory_management': 'orc'}]"
+      cpu: "['amd64']"

.github/workflows/daily_i386.yml

@@ -0,0 +1,15 @@
+name: Daily i386
+
+on:
+  schedule:
+    - cron: "30 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  test_i386:
+    name: Daily i386 (Linux)
+    uses: ./.github/workflows/base_daily_tests.yml
+    with:
+      nim: "[{'branch': 'version-1-6', 'memory_management': 'refc'}, {'branch': 'version-2-0', 'memory_management': 'refc'}, {'branch': 'devel', 'memory_management': 'orc'}]"
+      cpu: "['i386']"
+      exclude: "[{'platform': {'os':'macos'}}, {'platform': {'os':'windows'}}]"

.github/workflows/dependencies.yml

@@ -0,0 +1,50 @@
+name: Dependencies
+
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  bumper:
+    # Pushes new refs to interested external repositories, so they can do early testing against libp2p's newer versions
+    runs-on: ubuntu-latest
+    name: Bump libp2p's version for ${{ matrix.target.repository }}:${{ matrix.target.ref }}
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+          - repository: status-im/nimbus-eth2
+            ref: unstable
+          - repository: waku-org/nwaku
+            ref: master
+          - repository: codex-storage/nim-codex
+            ref: master
+    steps:
+      - name: Clone target repository
+        uses: actions/checkout@v4
+        with:
+          repository: ${{ matrix.target.repository }}
+          ref: ${{ matrix.target.ref}}
+          path: nbc
+          fetch-depth: 0
+          token: ${{ secrets.ACTIONS_GITHUB_TOKEN }}
+
+      - name: Checkout this ref in target repository
+        run: |
+          cd nbc
+          git submodule update --init vendor/nim-libp2p
+          cd vendor/nim-libp2p
+          git checkout $GITHUB_SHA
+
+      - name: Push this ref to target repository
+        run: |
+          cd nbc
+          git config --global user.email "${{ github.actor }}@users.noreply.github.com"
+          git config --global user.name = "${{ github.actor }}"
+          git commit --allow-empty -a -m "auto-bump nim-libp2p"
+          git branch -D nim-libp2p-auto-bump-${GITHUB_REF##*/} || true
+          git switch -c nim-libp2p-auto-bump-${GITHUB_REF##*/}
+          git push -f origin nim-libp2p-auto-bump-${GITHUB_REF##*/}
+

.github/workflows/documentation.yml

@@ -1,25 +1,27 @@
-name: Docgen
+name: Documentation Generation And Publishing
+
 on:
   push:
+    branches:
+      - master
   workflow_dispatch:
 
-
 jobs:
   build:
     timeout-minutes: 20
 
     name: 'Generate & upload documentation'
-    runs-on: 'ubuntu-20.04'
+    runs-on: ubuntu-latest
     continue-on-error: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: true
 
       - uses: jiro4989/setup-nim-action@v1
         with:
-          nim-version: 'stable'
+          nim-version: '1.6.x'
 
       - name: Generate doc
         run: |
@@ -27,15 +29,15 @@ jobs:
           nimble --version
           nimble install_pinned
           # nim doc can "fail", but the doc is still generated
-          nim doc --git.url:https://github.com/status-im/nim-libp2p --git.commit:${GITHUB_REF##*/} --outdir:${GITHUB_REF##*/} --project libp2p || true
+          nim doc --git.url:https://github.com/vacp2p/nim-libp2p --git.commit:${GITHUB_REF##*/} --outdir:${GITHUB_REF##*/} --project libp2p || true
 
           # check that the folder exists
           ls ${GITHUB_REF##*/}
 
       - name: Clone the gh-pages branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
-          repository: status-im/nim-libp2p
+          repository: vacp2p/nim-libp2p
           ref: gh-pages
           path: subdoc
           submodules: true
@@ -45,9 +47,6 @@ jobs:
         run: |
           cd subdoc
 
-          # Delete merged branches doc's
-          for branch in $(git branch -vv | grep ': gone]' | awk '{print $1}'); do rm -rf $branch; done
-
           # Update / create this branch doc
           rm -rf ${GITHUB_REF##*/}
           mv ../${GITHUB_REF##*/} .
@@ -63,12 +62,11 @@ jobs:
           git push origin gh-pages
 
   update_site:
-    if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/docs'
     name: 'Rebuild website'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - uses: actions/setup-python@v2
         with:
@@ -79,12 +77,12 @@ jobs:
           nim-version: 'stable'
 
       - name: Generate website
-        run: pip install mkdocs-material && nimble website
+        run: pip install mkdocs-material && nimble -y website
 
       - name: Clone the gh-pages branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
-          repository: status-im/nim-libp2p
+          repository: vacp2p/nim-libp2p
           ref: gh-pages
           path: subdoc
           fetch-depth: 0
@@ -93,11 +91,21 @@ jobs:
         run: |
           cd subdoc
 
+          # Ensure the latest changes are fetched and reset to the remote branch
+          git fetch origin gh-pages
+          git reset --hard origin/gh-pages
+
           rm -rf docs
           mv ../site docs
 
           git add .
-          git config --global user.email "${{ github.actor }}@users.noreply.github.com"
-          git config --global user.name = "${{ github.actor }}"
-          git commit -a -m "update website"
-          git push origin gh-pages
+ 
+          if git diff-index --quiet HEAD --; then
+            echo "No changes to commit"
+          else
+            git config --global user.email "${{ github.actor }}@users.noreply.github.com"
+            git config --global user.name "${{ github.actor }}"
+
+            git commit -m "update website"
+            git push origin gh-pages
+          fi

.github/workflows/interop.yml

@@ -0,0 +1,47 @@
+name: Interoperability Tests
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  run-transport-interop:
+    name: Run transport interoperability tests
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Free Disk Space (Ubuntu)
+        # For some reason the original job (libp2p/test-plans) has enough disk space, but this one doesn't.
+        uses: jlumbroso/free-disk-space@v1.3.1
+        with:
+          tool-cache: true
+
+      - uses: actions/checkout@v4
+      - uses: docker/setup-buildx-action@v3
+      - name: Build image
+        run: docker buildx build --load -t nim-libp2p-head -f tests/transport-interop/Dockerfile .
+      - name: Run tests
+        uses: libp2p/test-plans/.github/actions/run-transport-interop-test@master
+        with:
+          test-filter: nim-libp2p-head
+          extra-versions: ${{ github.workspace }}/tests/transport-interop/version.json
+
+  run-hole-punching-interop:
+    name: Run hole-punching interoperability tests
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-buildx-action@v3
+      - name: Build image
+        run: docker buildx build --load -t nim-libp2p-head -f tests/hole-punching-interop/Dockerfile .
+      - name: Run tests
+        uses: libp2p/test-plans/.github/actions/run-interop-hole-punch-test@master
+        with:
+          test-filter: nim-libp2p-head
+          extra-versions: ${{ github.workspace }}/tests/hole-punching-interop/version.json

.github/workflows/linters.yml

@@ -0,0 +1,32 @@
+name: Linters
+
+on:
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  nph:
+    name: NPH
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 2  # In PR, has extra merge commit: ^1 = PR, ^2 = base
+
+      - name: Setup NPH
+        # Pin nph to a specific version to avoid sudden style differences.
+        # Updating nph version should be accompanied with running the new version on the fluffy directory.
+        run: |
+          VERSION="v0.5.1"
+          ARCHIVE="nph-linux_x64.tar.gz"
+          curl -L "https://github.com/arnetheduck/nph/releases/download/${VERSION}/${ARCHIVE}" -o ${ARCHIVE}
+          tar -xzf ${ARCHIVE}
+
+      - name: Check style
+        run: |
+          shopt -s extglob  # Enable extended globbing
+          ./nph --check examples libp2p tests tools *.@(nim|nims|nimble)

.github/workflows/multi_nim.yml

@@ -1,82 +0,0 @@
-name: Daily
-on:
-  schedule:
-    - cron: "30 6 * * *"
-  workflow_dispatch:
-
-jobs:
-  delete-cache:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: snnaplab/delete-branch-cache-action@v1
-
-  build:
-    needs: delete-cache
-    timeout-minutes: 120
-    strategy:
-      fail-fast: false
-      matrix:
-        target:
-          - os: linux
-            cpu: amd64
-          - os: linux
-            cpu: i386
-          - os: macos
-            cpu: amd64
-          - os: windows
-            cpu: amd64
-          #- os: windows
-            #cpu: i386
-        branch: [version-1-2, version-1-6, devel]
-        include:
-          - target:
-              os: linux
-            builder: ubuntu-20.04
-            shell: bash
-          - target:
-              os: macos
-            builder: macos-12
-            shell: bash
-          - target:
-              os: windows
-            builder: windows-2019
-            shell: msys2 {0}
-
-    defaults:
-      run:
-        shell: ${{ matrix.shell }}
-
-    name: '${{ matrix.target.os }}-${{ matrix.target.cpu }} (Nim ${{ matrix.branch }})'
-    runs-on: ${{ matrix.builder }}
-    continue-on-error: ${{ matrix.branch == 'devel' }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Setup Nim
-        uses: "./.github/actions/install_nim"
-        with:
-          os: ${{ matrix.target.os }}
-          shell: ${{ matrix.shell }}
-          nim_branch: ${{ matrix.branch }}
-          cpu: ${{ matrix.target.cpu }}
-
-      - name: Setup Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: '~1.15.5'
-
-      - name: Install p2pd
-        run: |
-          V=1 bash scripts/build_p2pd.sh p2pdCache 124530a3
-
-      - name: Run tests
-        run: |
-          nim --version
-          nimble --version
-          nimble install -y --depsOnly
-          NIMFLAGS="${NIMFLAGS} --gc:refc" nimble test
-          if [[ "${{ matrix.branch }}" == "devel" ]]; then
-            echo -e "\nTesting with '--gc:orc':\n"
-            NIMFLAGS="${NIMFLAGS} --gc:orc" nimble test
-          fi

.gitignore

@@ -16,3 +16,4 @@ tests/pubsub/testgossipsub
 examples/*.md
 nimble.develop
 nimble.paths
+go-libp2p-daemon/

.pinned

@@ -1,16 +1,17 @@
-bearssl;https://github.com/status-im/nim-bearssl@#a647994910904b0103a05db3a5ec1ecfc4d91a88
+bearssl;https://github.com/status-im/nim-bearssl@#667b40440a53a58e9f922e29e20818720c62d9ac
 chronicles;https://github.com/status-im/nim-chronicles@#32ac8679680ea699f7dbc046e8e0131cac97d41a
-chronos;https://github.com/status-im/nim-chronos@#75d030ff71264513fb9701c75a326cd36fcb4692
-dnsclient;https://github.com/ba0f3/dnsclient.nim@#fcd7443634b950eaea574e5eaa00a628ae029823
-faststreams;https://github.com/status-im/nim-faststreams@#b42daf41d8eb4fbce40add6836bed838f8d85b6f
-httputils;https://github.com/status-im/nim-http-utils@#a85bd52ae0a956983ca6b3267c72961d2ec0245f
-json_serialization;https://github.com/status-im/nim-json-serialization@#a7d815ed92f200f490c95d3cfd722089cc923ce6
-metrics;https://github.com/status-im/nim-metrics@#21e99a2e9d9f80e68bef65c80ef781613005fccb
-nimcrypto;https://github.com/cheatfate/nimcrypto@#24e006df85927f64916e60511620583b11403178
-secp256k1;https://github.com/status-im/nim-secp256k1@#fd173fdff863ce2e211cf64c9a03bc7539fe40b0
-serialization;https://github.com/status-im/nim-serialization@#d77417cba6896c26287a68e6a95762e45a1b87e5
-stew;https://github.com/status-im/nim-stew@#7184d2424dc3945657884646a72715d494917aad
+chronos;https://github.com/status-im/nim-chronos@#dc3847e4d6733dfc3811454c2a9c384b87343e26
+dnsclient;https://github.com/ba0f3/dnsclient.nim@#23214235d4784d24aceed99bbfe153379ea557c8
+faststreams;https://github.com/status-im/nim-faststreams@#720fc5e5c8e428d9d0af618e1e27c44b42350309
+httputils;https://github.com/status-im/nim-http-utils@#3b491a40c60aad9e8d3407443f46f62511e63b18
+json_serialization;https://github.com/status-im/nim-json-serialization@#85b7ea093cb85ee4f433a617b97571bd709d30df
+metrics;https://github.com/status-im/nim-metrics@#6142e433fc8ea9b73379770a788017ac528d46ff
+nimcrypto;https://github.com/cheatfate/nimcrypto@#1c8d6e3caf3abc572136ae9a1da81730c4eb4288
+results;https://github.com/arnetheduck/nim-results@#f3c666a272c69d70cb41e7245e7f6844797303ad
+secp256k1;https://github.com/status-im/nim-secp256k1@#7246d91c667f4cc3759fdd50339caa45a2ecd8be
+serialization;https://github.com/status-im/nim-serialization@#4bdbc29e54fe54049950e352bb969aab97173b35
+stew;https://github.com/status-im/nim-stew@#3159137d9a3110edb4024145ce0ba778975de40e
 testutils;https://github.com/status-im/nim-testutils@#dfc4c1b39f9ded9baf6365014de2b4bfb4dafc34
-unittest2;https://github.com/status-im/nim-unittest2@#da8398c45cafd5bd7772da1fc96e3924a18d3823
-websock;https://github.com/status-im/nim-websock@#691f069b209d372b1240d5ae1f57fb7bbafeaba7
-zlib;https://github.com/status-im/nim-zlib@#6a6670afba6b97b29b920340e2641978c05ab4d8
+unittest2;https://github.com/status-im/nim-unittest2@#2300fa9924a76e6c96bc4ea79d043e3a0f27120c
+websock;https://github.com/status-im/nim-websock@#f8ed9b40a5ff27ad02a3c237c4905b0924e3f982
+zlib;https://github.com/status-im/nim-zlib@#38b72eda9d70067df4a953f56b5ed59630f2a17b

README.md

@@ -5,8 +5,8 @@
 <h3 align="center">The <a href="https://nim-lang.org/">Nim</a> implementation of the <a href="https://libp2p.io/">libp2p</a> Networking Stack.</h3>
 
 <p align="center">
-<a href="https://github.com/status-im/nim-libp2p/actions"><img src="https://github.com/status-im/nim-libp2p/actions/workflows/ci.yml/badge.svg" /></a>
-<a href="https://codecov.io/gh/status-im/nim-libp2p"><img src="https://codecov.io/gh/status-im/nim-libp2p/branch/master/graph/badge.svg?token=UR5JRQ249W"/></a>
+<a href="https://github.com/vacp2p/nim-libp2p/actions"><img src="https://github.com/vacp2p/nim-libp2p/actions/workflows/ci.yml/badge.svg" /></a>
+<a href="https://codecov.io/gh/vacp2p/nim-libp2p"><img src="https://codecov.io/gh/vacp2p/nim-libp2p/branch/master/graph/badge.svg?token=UR5JRQ249W"/></a>
 
 </p>
 
@@ -20,6 +20,7 @@
 - [Background](#background)
 - [Install](#install)
 - [Getting Started](#getting-started)
+  - [Go-libp2p-daemon](#go-libp2p-daemon)
 - [Modules](#modules)
 - [Users](#users)
 - [Stability](#stability)
@@ -40,18 +41,20 @@ Learn more about libp2p at [**libp2p.io**](https://libp2p.io) and follow libp2p'
 ## Install
 **Prerequisite**
 - [Nim](https://nim-lang.org/install.html)
+> The currently supported Nim version is 1.6.18.
+
 ```
 nimble install libp2p
 ```
 
 ## Getting Started
-You'll find the nim-libp2p documentation [here](https://status-im.github.io/nim-libp2p/docs/).
+You'll find the nim-libp2p documentation [here](https://vacp2p.github.io/nim-libp2p/docs/).
 
-**Go Daemon:**
-Please find the installation and usage intructions in [daemonapi.md](examples/go-daemon/daemonapi.md).
+### Testing
+Remember you'll need to build the `go-libp2p-daemon` binary to run the `nim-libp2p` tests.
+To do so, please follow the installation instructions in [daemonapi.md](examples/go-daemon/daemonapi.md).
 
 ## Modules
-
 List of packages modules implemented in nim-libp2p:
 
 | Name                                                       | Description                                                                                                      |
@@ -68,7 +71,6 @@ List of packages modules implemented in nim-libp2p:
 | [libp2p-ws](libp2p/transports/wstransport.nim)             | WebSocket & WebSocket Secure transport                                                                           |
 | [libp2p-tor](libp2p/transports/tortransport.nim)           | Tor Transport                                                                                                    |
 | **Secure Channels**                                        |                                                                                                                  |
-| [libp2p-secio](libp2p/protocols/secure/secio.nim)          | Secio secure channel                                                                                             |
 | [libp2p-noise](libp2p/protocols/secure/noise.nim)          | [Noise](https://docs.libp2p.io/concepts/secure-comm/noise/) secure channel                                       |
 | [libp2p-plaintext](libp2p/protocols/secure/plaintext.nim)  | Plain Text for development purposes                                                                              |
 | **Stream Multiplexers**                                    |                                                                                                                  |
@@ -93,8 +95,8 @@ List of packages modules implemented in nim-libp2p:
 
 nim-libp2p is used by:
 - [Nimbus](https://github.com/status-im/nimbus-eth2), an Ethereum client
-- [nwaku](https://github.com/status-im/nwaku), a decentralized messaging application
-- [nim-codex](https://github.com/status-im/nim-codex), a decentralized storage application
+- [nwaku](https://github.com/waku-org/nwaku), a decentralized messaging application
+- [nim-codex](https://github.com/codex-storage/nim-codex), a decentralized storage application
 - (open a pull request if you want to be included here)
 
 ## Stability
@@ -105,12 +107,12 @@ The versioning follows [semver](https://semver.org/), with some additions:
 - Some of libp2p procedures are marked as `.public.`, they will remain compatible during each `MAJOR` version
 - The rest of the procedures are considered internal, and can change at any `MINOR` version (but remain compatible for each new `PATCH`)
 
-We aim to be compatible at all time with at least 2 Nim `MINOR` versions, currently `1.2 & 1.6`
+We aim to be compatible at all time with at least 2 Nim `MINOR` versions, currently `1.6 & 2.0`
 
 ## Development
 Clone and Install dependencies:
 ```sh
-git clone https://github.com/status-im/nim-libp2p
+git clone https://github.com/vacp2p/nim-libp2p
 cd nim-libp2p
 # to use dependencies computed by nimble
 nimble install -dy
@@ -132,11 +134,12 @@ The libp2p implementation in Nim is a work in progress. We welcome contributors
 - Go through the modules and **check out existing issues**. This would be especially useful for modules in active development. Some knowledge of IPFS/libp2p may be required, as well as the infrastructure behind it.
 - **Perform code reviews**. Feel free to let us know if you found anything that can a) speed up the project development b) ensure better quality and c) reduce possible future bugs.
 - **Add tests**. Help nim-libp2p to be more robust by adding more tests to the [tests folder](tests/).
-
+- **Small PRs**. Try to keep PRs atomic and digestible. This makes the review process and pinpointing bugs easier.
+- **Code format**. Please format code using [nph](https://github.com/arnetheduck/nph) v0.5.1. This will ensure a consistent codebase and make PRs easier to review. A CI rule has been added to ensure that future commits are all formatted using the same nph version.
 The code follows the [Status Nim Style Guide](https://status-im.github.io/nim-style-guide/).
 
 ### Contributors
-<a href="https://github.com/status-im/nim-libp2p/graphs/contributors"><img src="https://contrib.rocks/image?repo=status-im/nim-libp2p" alt="nim-libp2p contributors"></a>
+<a href="https://github.com/vacp2p/nim-libp2p/graphs/contributors"><img src="https://contrib.rocks/image?repo=vacp2p/nim-libp2p" alt="nim-libp2p contributors"></a>
 
 ### Core Maintainers
 <table>

config.nims

@@ -7,17 +7,17 @@ if dirExists("nimbledeps/pkgs2"):
 switch("warning", "CaseTransition:off")
 switch("warning", "ObservableStores:off")
 switch("warning", "LockLevel:off")
---define:chronosStrictException
---styleCheck:usages
-if (NimMajor, NimMinor) < (1, 6):
-  --styleCheck:hint
-else:
-  --styleCheck:error
+--styleCheck:
+  usages
+switch("warningAsError", "UseBase:on")
+--styleCheck:
+  error
 
 # Avoid some rare stack corruption while using exceptions with a SEH-enabled
 # toolchain: https://github.com/status-im/nimbus-eth2/issues/3121
 if defined(windows) and not defined(vcc):
-  --define:nimRawSetjmp
+  --define:
+    nimRawSetjmp
 
 # begin Nimble config (version 1)
 when fileExists("nimble.paths"):

examples/circuitrelay.nim

@@ -1,25 +1,25 @@
 ## # Circuit Relay example
 ##
 ## Circuit Relay can be used when a node cannot reach another node
-## directly, but can reach it through a another node (the Relay).
+## directly, but can reach it through another node (the Relay).
 ##
 ## That may happen because of NAT, Firewalls, or incompatible transports.
 ##
 ## More informations [here](https://docs.libp2p.io/concepts/circuit-relay/).
 import chronos, stew/byteutils
-import libp2p,
-       libp2p/protocols/connectivity/relay/[relay, client]
+import libp2p, libp2p/protocols/connectivity/relay/[relay, client]
 
 # Helper to create a circuit relay node
 proc createCircuitRelaySwitch(r: Relay): Switch =
-  SwitchBuilder.new()
-    .withRng(newRng())
-    .withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
-    .withTcpTransport()
-    .withMplex()
-    .withNoise()
-    .withCircuitRelay(r)
-    .build()
+  SwitchBuilder
+  .new()
+  .withRng(newRng())
+  .withAddresses(@[MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()])
+  .withTcpTransport()
+  .withMplex()
+  .withNoise()
+  .withCircuitRelay(r)
+  .build()
 
 proc main() {.async.} =
   # Create a custom protocol
@@ -56,8 +56,11 @@ proc main() {.async.} =
 
   let
     # Create a relay address to swDst using swRel as the relay
-    addrs = MultiAddress.init($swRel.peerInfo.addrs[0] & "/p2p/" &
-                              $swRel.peerInfo.peerId & "/p2p-circuit").get()
+    addrs = MultiAddress
+      .init(
+        $swRel.peerInfo.addrs[0] & "/p2p/" & $swRel.peerInfo.peerId & "/p2p-circuit"
+      )
+      .get()
 
   # Connect Dst to the relay
   await swDst.connect(swRel.peerInfo.peerId, swRel.peerInfo.addrs)
@@ -66,7 +69,7 @@ proc main() {.async.} =
   let rsvp = await clDst.reserve(swRel.peerInfo.peerId, swRel.peerInfo.addrs)
 
   # Src dial Dst using the relay
-  let conn = await swSrc.dial(swDst.peerInfo.peerId, @[ addrs ], customProtoCodec)
+  let conn = await swSrc.dial(swDst.peerInfo.peerId, @[addrs], customProtoCodec)
 
   await conn.writeLp("test1")
   var msg = string.fromBytes(await conn.readLp(1024))

examples/directchat.nim

@@ -1,15 +1,12 @@
-when not(compileOption("threads")):
+when not (compileOption("threads")):
   {.fatal: "Please, compile this program with the --threads:on option!".}
 
-import
-  strformat, strutils,
-  stew/byteutils,
-  chronos,
-  libp2p
+import strformat, strutils, stew/byteutils, chronos, libp2p
 
 const DefaultAddr = "/ip4/127.0.0.1/tcp/0"
 
-const Help = """
+const Help =
+  """
   Commands: /[?|help|connect|disconnect|exit]
   help: Prints this help
   connect: dials a remote peer
@@ -17,12 +14,11 @@ const Help = """
   exit: closes the chat
 """
 
-type
-  Chat = ref object
-    switch: Switch          # a single entry point for dialing and listening to peer
-    stdinReader: StreamTransport # transport streams between read & write file descriptor
-    conn: Connection        # connection to the other peer
-    connected: bool         # if the node is connected to another peer
+type Chat = ref object
+  switch: Switch # a single entry point for dialing and listening to peer
+  stdinReader: StreamTransport # transport streams between read & write file descriptor
+  conn: Connection # connection to the other peer
+  connected: bool # if the node is connected to another peer
 
 ##
 # Stdout helpers, to write the prompt
@@ -41,8 +37,7 @@ proc writeStdout(c: Chat, str: string) =
 ##
 const ChatCodec = "/nim-libp2p/chat/1.0.0"
 
-type
-  ChatProto = ref object of LPProtocol
+type ChatProto = ref object of LPProtocol
 
 proc new(T: typedesc[ChatProto], c: Chat): T =
   let chatproto = T()
@@ -77,9 +72,9 @@ proc handlePeer(c: Chat, conn: Connection) {.async.} =
         strData = await conn.readLp(1024)
         str = string.fromBytes(strData)
       c.writeStdout $conn.peerId & ": " & $str
-
   except LPStreamEOFError:
-    defer: c.writeStdout $conn.peerId & " disconnected"
+    defer:
+      c.writeStdout $conn.peerId & " disconnected"
     await c.conn.close()
     c.connected = false
 
@@ -88,10 +83,7 @@ proc dialPeer(c: Chat, address: string) {.async.} =
   let
     multiAddr = MultiAddress.init(address).tryGet()
     # split the peerId part /p2p/...
-    peerIdBytes = multiAddr[multiCodec("p2p")]
-      .tryGet()
-      .protoAddress()
-      .tryGet()
+    peerIdBytes = multiAddr[multiCodec("p2p")].tryGet().protoAddress().tryGet()
     remotePeer = PeerId.init(peerIdBytes).tryGet()
     # split the wire address
     ip4Addr = multiAddr[multiCodec("ip4")].tryGet()
@@ -124,7 +116,6 @@ proc readLoop(c: Chat) {.async.} =
       let address = await c.stdinReader.readLine()
       if address.len > 0:
         await c.dialPeer(address)
-
     elif line.startsWith("/exit"):
       if c.connected and c.conn.closed.not:
         await c.conn.close()
@@ -171,16 +162,18 @@ proc main() {.async.} =
 
   var switch = SwitchBuilder
     .new()
-    .withRng(rng)       # Give the application RNG
+    .withRng(rng)
+    # Give the application RNG
     .withAddress(localAddress)
-    .withTcpTransport() # Use TCP as transport
-    .withMplex()        # Use Mplex as muxer
-    .withNoise()        # Use Noise as secure manager
+    .withTcpTransport()
+    # Use TCP as transport
+    .withMplex()
+    # Use Mplex as muxer
+    .withNoise()
+    # Use Noise as secure manager
     .build()
 
-  let chat = Chat(
-    switch: switch,
-    stdinReader: stdinReader)
+  let chat = Chat(switch: switch, stdinReader: stdinReader)
 
   switch.mount(ChatProto.new(chat))
 

examples/go-daemon/bootstrap.nim

@@ -2,8 +2,7 @@ import chronos, nimcrypto, strutils
 import ../../libp2p/daemon/daemonapi
 import ../hexdump
 
-const
-  PubSubTopic = "test-net"
+const PubSubTopic = "test-net"
 
 proc dumpSubscribedPeers(api: DaemonAPI) {.async.} =
   var peers = await api.pubsubListPeers(PubSubTopic)
@@ -37,12 +36,12 @@ proc main() {.async.} =
 
   asyncSpawn monitor(api)
 
-  proc pubsubLogger(api: DaemonAPI,
-                    ticket: PubsubTicket,
-                    message: PubSubMessage): Future[bool] {.async.} =
+  proc pubsubLogger(
+      api: DaemonAPI, ticket: PubsubTicket, message: PubSubMessage
+  ): Future[bool] {.async.} =
     let msglen = len(message.data)
-    echo "= Recieved pubsub message with length ", msglen,
-         " bytes from peer ", message.peer.pretty()
+    echo "= Recieved pubsub message with length ",
+      msglen, " bytes from peer ", message.peer.pretty()
     echo dumpHex(message.data)
     await api.dumpSubscribedPeers()
     result = true

examples/go-daemon/chat.nim

@@ -2,18 +2,16 @@ import chronos, nimcrypto, strutils
 import ../../libp2p/daemon/daemonapi
 
 ## nim c -r --threads:on chat.nim
-when not(compileOption("threads")):
+when not (compileOption("threads")):
   {.fatal: "Please, compile this program with the --threads:on option!".}
 
-const
-  ServerProtocols = @["/test-chat-stream"]
+const ServerProtocols = @["/test-chat-stream"]
 
-type
-  CustomData = ref object
-    api: DaemonAPI
-    remotes: seq[StreamTransport]
-    consoleFd: AsyncFD
-    serveFut: Future[void]
+type CustomData = ref object
+  api: DaemonAPI
+  remotes: seq[StreamTransport]
+  consoleFd: AsyncFD
+  serveFut: Future[void]
 
 proc threadMain(wfd: AsyncFD) {.thread.} =
   ## This procedure performs reading from `stdin` and sends data over
@@ -82,7 +80,7 @@ proc serveThread(udata: CustomData) {.async.} =
                 relay = true
                 break
             if relay:
-              echo peer.pretty(), " * ",  " [", addresses.join(", "), "]"
+              echo peer.pretty(), " * ", " [", addresses.join(", "), "]"
             else:
               echo peer.pretty(), " [", addresses.join(", "), "]"
       elif line.startsWith("/exit"):

examples/go-daemon/daemonapi.md

@@ -1,6 +1,8 @@
 # Table of Contents
 - [Introduction](#introduction)
+- [Prerequisites](#prerequisites)
 - [Installation](#installation)
+  - [Script](#script)
 - [Usage](#usage)
   - [Example](#example)
   - [Getting Started](#getting-started)
@@ -8,26 +10,29 @@
 # Introduction
 This is a libp2p-backed daemon wrapping the functionalities of go-libp2p for use in Nim. <br>
 For more information about the go daemon, check out [this repository](https://github.com/libp2p/go-libp2p-daemon).
+> **Required only** for running the tests.
+
+# Prerequisites
+Go with version `1.15.15`.
+> You will *likely* be able to build `go-libp2p-daemon` with different Go versions, but **they haven't been tested**.
 
 # Installation
+Follow one of the methods below:
+
+## Script
+Run the build script while having the `go` command pointing to the correct Go version.
+We recommend using `1.15.15`, as previously stated.
 ```sh
-# clone and install dependencies
-git clone https://github.com/status-im/nim-libp2p
-cd nim-libp2p
-nimble install
-
-# perform unit tests
-nimble test
-
-# update the git submodule to install the go daemon 
-git submodule update --init --recursive
-go version
-git clone https://github.com/libp2p/go-libp2p-daemon
-cd go-libp2p-daemon
-git checkout v0.0.1
-go install ./...
-cd ..
+./scripts/build_p2pd.sh
 ```
+If everything goes correctly, the binary (`p2pd`) should be built and placed in the correct directory.
+If you find any issues, please head into our discord and ask for our assistance.
+
+After successfully building the binary, remember to add it to your path so it can be found. You can do that by running:
+```sh
+export PATH="$PATH:$HOME/go/bin"
+```
+> **Tip:** To make this change permanent, add the command above to your `.bashrc` file.
 
 # Usage 
 

examples/go-daemon/node.nim

@@ -1,26 +1,25 @@
 import chronos, nimcrypto, strutils, os
 import ../../libp2p/daemon/daemonapi
 
-const
-  PubSubTopic = "test-net"
+const PubSubTopic = "test-net"
 
 proc main(bn: string) {.async.} =
   echo "= Starting P2P node"
   var bootnodes = bn.split(",")
-  var api = await newDaemonApi({DHTFull, PSGossipSub, WaitBootstrap},
-                               bootstrapNodes = bootnodes,
-                               peersRequired = 1)
+  var api = await newDaemonApi(
+    {DHTFull, PSGossipSub, WaitBootstrap}, bootstrapNodes = bootnodes, peersRequired = 1
+  )
   var id = await api.identity()
   echo "= P2P node ", id.peer.pretty(), " started:"
   for item in id.addresses:
     echo item
 
-  proc pubsubLogger(api: DaemonAPI,
-                    ticket: PubsubTicket,
-                    message: PubSubMessage): Future[bool] {.async.} =
+  proc pubsubLogger(
+      api: DaemonAPI, ticket: PubsubTicket, message: PubSubMessage
+  ): Future[bool] {.async.} =
     let msglen = len(message.data)
-    echo "= Recieved pubsub message with length ", msglen,
-         " bytes from peer ", message.peer.pretty(), ": "
+    echo "= Recieved pubsub message with length ",
+      msglen, " bytes from peer ", message.peer.pretty(), ": "
     var strdata = cast[string](message.data)
     echo strdata
     result = true

examples/helloworld.nim

@@ -1,5 +1,5 @@
-import chronos         # an efficient library for async
-import stew/byteutils  # various utils
+import chronos # an efficient library for async
+import stew/byteutils # various utils
 import libp2p
 
 ##
@@ -7,20 +7,18 @@ import libp2p
 ##
 const TestCodec = "/test/proto/1.0.0" # custom protocol string identifier
 
-type
-  TestProto = ref object of LPProtocol # declare a custom protocol
+type TestProto = ref object of LPProtocol # declare a custom protocol
 
 proc new(T: typedesc[TestProto]): T =
-
   # every incoming connections will be in handled in this closure
-  proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     echo "Got from remote - ", string.fromBytes(await conn.readLp(1024))
     await conn.writeLp("Roger p2p!")
 
     # We must close the connections ourselves when we're done with it
     await conn.close()
 
-  return T(codecs: @[TestCodec], handler: handle)
+  return T.new(codecs = @[TestCodec], handler = handle)
 
 ##
 # Helper to create a switch/node
@@ -28,11 +26,16 @@ proc new(T: typedesc[TestProto]): T =
 proc createSwitch(ma: MultiAddress, rng: ref HmacDrbgContext): Switch =
   var switch = SwitchBuilder
     .new()
-    .withRng(rng)       # Give the application RNG
-    .withAddress(ma)    # Our local address(es)
-    .withTcpTransport() # Use TCP as transport
-    .withMplex()        # Use Mplex as muxer
-    .withNoise()        # Use Noise as secure manager
+    .withRng(rng)
+    # Give the application RNG
+    .withAddress(ma)
+    # Our local address(es)
+    .withTcpTransport()
+    # Use TCP as transport
+    .withMplex()
+    # Use Mplex as muxer
+    .withNoise()
+    # Use Noise as secure manager
     .build()
 
   result = switch
@@ -40,7 +43,7 @@ proc createSwitch(ma: MultiAddress, rng: ref HmacDrbgContext): Switch =
 ##
 # The actual application
 ##
-proc main() {.async, gcsafe.} =
+proc main() {.async.} =
   let
     rng = newRng() # Single random number source for the whole application
     # port 0 will take a random available port
@@ -73,7 +76,8 @@ proc main() {.async, gcsafe.} =
   # use the second node to dial the first node
   # using the first node peerid and address
   # and specify our custom protocol codec
-  let conn = await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, TestCodec)
+  let conn =
+    await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, TestCodec)
 
   # conn is now a fully setup connection, we talk directly to the node1 custom protocol handler
   await conn.writeLp("Hello p2p!") # writeLp send a length prefixed buffer over the wire
@@ -84,6 +88,7 @@ proc main() {.async, gcsafe.} =
   # We must close the connection ourselves when we're done with it
   await conn.close()
 
-  await allFutures(switch1.stop(), switch2.stop()) # close connections and shutdown all transports
+  await allFutures(switch1.stop(), switch2.stop())
+    # close connections and shutdown all transports
 
 waitFor(main())

examples/hexdump.nim

@@ -35,26 +35,24 @@ proc dumpHex*(pbytes: pointer, nbytes: int, items = 1, ascii = true): string =
   var asciiText = ""
   while i < nbytes:
     if i %% 16 == 0:
-      result = result & toHex(cast[BiggestInt](slider),
-                              sizeof(BiggestInt) * 2) & ":  "
+      result = result & toHex(cast[BiggestInt](slider), sizeof(BiggestInt) * 2) & ":  "
     var k = 0
     while k < items:
       var ch = cast[ptr char](cast[uint](slider) + k.uint)[]
-      if ord(ch) > 31 and ord(ch) < 127: asciiText &= ch else: asciiText &= "."
+      if ord(ch) > 31 and ord(ch) < 127:
+        asciiText &= ch
+      else:
+        asciiText &= "."
       inc(k)
-    case items:
+    case items
     of 1:
-      result = result & toHex(cast[BiggestInt](cast[ptr uint8](slider)[]),
-                              hexSize)
+      result = result & toHex(cast[BiggestInt](cast[ptr uint8](slider)[]), hexSize)
     of 2:
-      result = result & toHex(cast[BiggestInt](cast[ptr uint16](slider)[]),
-                              hexSize)
+      result = result & toHex(cast[BiggestInt](cast[ptr uint16](slider)[]), hexSize)
     of 4:
-      result = result & toHex(cast[BiggestInt](cast[ptr uint32](slider)[]),
-                              hexSize)
+      result = result & toHex(cast[BiggestInt](cast[ptr uint32](slider)[]), hexSize)
     of 8:
-      result = result & toHex(cast[BiggestInt](cast[ptr uint64](slider)[]),
-                              hexSize)
+      result = result & toHex(cast[BiggestInt](cast[ptr uint64](slider)[]), hexSize)
     else:
       raise newException(ValueError, "Wrong items size!")
     result = result & " "

examples/tutorial_1_connect.nim

@@ -34,15 +34,20 @@ import libp2p/protocols/ping
 
 ## [chronos](https://github.com/status-im/nim-chronos) the asynchronous framework used by `nim-libp2p`
 ##
-## Next, we'll create an helper procedure to create our switches. A switch needs a bit of configuration, and it will be easier to do this configuration only once:
+## Next, we'll create a helper procedure to create our switches. A switch needs a bit of configuration, and it will be easier to do this configuration only once:
 proc createSwitch(ma: MultiAddress, rng: ref HmacDrbgContext): Switch =
   var switch = SwitchBuilder
     .new()
-    .withRng(rng)       # Give the application RNG
-    .withAddress(ma)    # Our local address(es)
-    .withTcpTransport() # Use TCP as transport
-    .withMplex()        # Use Mplex as muxer
-    .withNoise()        # Use Noise as secure manager
+    .withRng(rng)
+    # Give the application RNG
+    .withAddress(ma)
+    # Our local address(es)
+    .withTcpTransport()
+    # Use TCP as transport
+    .withMplex()
+    # Use Mplex as muxer
+    .withNoise()
+    # Use Noise as secure manager
     .build()
 
   return switch
@@ -53,11 +58,11 @@ proc createSwitch(ma: MultiAddress, rng: ref HmacDrbgContext): Switch =
 ##
 ##
 ## Let's now start to create our main procedure:
-proc main() {.async, gcsafe.} =
+proc main() {.async.} =
   let
     rng = newRng()
     localAddress = MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()
-    pingProtocol = Ping.new(rng=rng)
+    pingProtocol = Ping.new(rng = rng)
   ## We created some variables that we'll need for the rest of the application: the global `rng` instance, our `localAddress`, and an instance of the `Ping` protocol.
   ## The address is in the [MultiAddress](https://github.com/multiformats/multiaddr) format. The port `0` means "take any port available".
   ##
@@ -77,8 +82,9 @@ proc main() {.async, gcsafe.} =
   ## Now that we've started the nodes, they are listening for incoming peers.
   ## We can find out which port was attributed, and the resulting local addresses, by using `switch1.peerInfo.addrs`.
   ##
-  ## We'll **dial** the first switch from the second one, by specifying it's **Peer ID**, it's **MultiAddress** and the **`Ping` protocol codec**:
-  let conn = await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, PingCodec)
+  ## We'll **dial** the first switch from the second one, by specifying its **Peer ID**, its **MultiAddress** and the **`Ping` protocol codec**:
+  let conn =
+    await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, PingCodec)
   ## We now have a `Ping` connection setup between the second and the first switch, we can use it to actually ping the node:
   # ping the other node and echo the ping duration
   echo "ping: ", await pingProtocol.ping(conn)
@@ -86,7 +92,8 @@ proc main() {.async, gcsafe.} =
   # We must close the connection ourselves when we're done with it
   await conn.close()
   ## And that's it! Just a little bit of cleanup: shutting down the switches, waiting for them to stop, and we'll call our `main` procedure:
-  await allFutures(switch1.stop(), switch2.stop()) # close connections and shutdown all transports
+  await allFutures(switch1.stop(), switch2.stop())
+    # close connections and shutdown all transports
 
 waitFor(main())
 

examples/tutorial_2_customproto.nim

@@ -18,14 +18,14 @@ type TestProto = ref object of LPProtocol
 
 ## We've set a [protocol ID](https://docs.libp2p.io/concepts/protocols/#protocol-ids), and created a custom `LPProtocol`. In a more complex protocol, we could use this structure to store interesting variables.
 ##
-## A protocol generally has two part: and handling/server part, and a dialing/client part.
-## Theses two parts can be identical, but in our trivial protocol, the server will wait for a message from the client, and the client will send a message, so we have to handle the two cases separately.
+## A protocol generally has two parts: a handling/server part, and a dialing/client part.
+## These two parts can be identical, but in our trivial protocol, the server will wait for a message from the client, and the client will send a message, so we have to handle the two cases separately.
 ##
 ## Let's start with the server part:
 
 proc new(T: typedesc[TestProto]): T =
   # every incoming connections will in be handled in this closure
-  proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     # Read up to 1024 bytes from this connection, and transform them into
     # a string
     echo "Got from remote - ", string.fromBytes(await conn.readLp(1024))
@@ -41,29 +41,31 @@ proc new(T: typedesc[TestProto]): T =
 proc hello(p: TestProto, conn: Connection) {.async.} =
   await conn.writeLp("Hello p2p!")
 
-## Again, pretty straight-forward, we just send a message on the connection.
+## Again, pretty straightforward, we just send a message on the connection.
 ##
 ## We can now create our main procedure:
-proc main() {.async, gcsafe.} =
+proc main() {.async.} =
   let
     rng = newRng()
     testProto = TestProto.new()
-    switch1 = newStandardSwitch(rng=rng)
-    switch2 = newStandardSwitch(rng=rng)
+    switch1 = newStandardSwitch(rng = rng)
+    switch2 = newStandardSwitch(rng = rng)
 
   switch1.mount(testProto)
 
   await switch1.start()
   await switch2.start()
 
-  let conn = await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, TestCodec)
+  let conn =
+    await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, TestCodec)
 
   await testProto.hello(conn)
 
   # We must close the connection ourselves when we're done with it
   await conn.close()
 
-  await allFutures(switch1.stop(), switch2.stop()) # close connections and shutdown all transports
+  await allFutures(switch1.stop(), switch2.stop())
+    # close connections and shutdown all transports
 
 ## This is very similar to the first tutorial's `main`, the only noteworthy difference is that we use `newStandardSwitch`, which is similar to the `createSwitch` of the first tutorial, but is bundled directly in libp2p
 ##

examples/tutorial_3_protobuf.nim

@@ -57,8 +57,8 @@ proc decode(_: type Metric, buf: seq[byte]): Result[Metric, ProtoError] =
   #
   # We are just checking the error, and ignoring whether the value
   # is present or not (default values are valid).
-  discard ? pb.getField(1, res.name)
-  discard ? pb.getField(2, res.value)
+  discard ?pb.getField(1, res.name)
+  discard ?pb.getField(2, res.value)
   ok(res)
 
 proc encode(m: MetricList): ProtoBuffer =
@@ -72,10 +72,10 @@ proc decode(_: type MetricList, buf: seq[byte]): Result[MetricList, ProtoError]
     res: MetricList
     metrics: seq[seq[byte]]
   let pb = initProtoBuffer(buf)
-  discard ? pb.getRepeatedField(1, metrics)
+  discard ?pb.getRepeatedField(1, metrics)
 
   for metric in metrics:
-    res.metrics &= ? Metric.decode(metric)
+    res.metrics &= ?Metric.decode(metric)
   ok(res)
 
 ## ## Results instead of exceptions
@@ -102,13 +102,13 @@ proc decode(_: type MetricList, buf: seq[byte]): Result[MetricList, ProtoError]
 ## ## Creating the protocol
 ## We'll next create a protocol, like in the last tutorial, to request these metrics from our host
 type
-  MetricCallback = proc: Future[MetricList] {.raises: [], gcsafe.}
+  MetricCallback = proc(): Future[MetricList] {.raises: [], gcsafe.}
   MetricProto = ref object of LPProtocol
     metricGetter: MetricCallback
 
 proc new(_: typedesc[MetricProto], cb: MetricCallback): MetricProto =
   var res: MetricProto
-  proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     let
       metrics = await res.metricGetter()
       asProtobuf = metrics.encode()
@@ -126,21 +126,21 @@ proc fetch(p: MetricProto, conn: Connection): Future[MetricList] {.async.} =
   return MetricList.decode(protobuf).tryGet()
 
 ## We can now create our main procedure:
-proc main() {.async, gcsafe.} =
+proc main() {.async.} =
   let rng = newRng()
-  proc randomMetricGenerator: Future[MetricList] {.async.} =
+  proc randomMetricGenerator(): Future[MetricList] {.async.} =
     let metricCount = rng[].generate(uint32) mod 16
     for i in 0 ..< metricCount + 1:
-      result.metrics.add(Metric(
-        name: "metric_" & $i,
-        value: float(rng[].generate(uint16)) / 1000.0
-      ))
+      result.metrics.add(
+        Metric(name: "metric_" & $i, value: float(rng[].generate(uint16)) / 1000.0)
+      )
     return result
+
   let
     metricProto1 = MetricProto.new(randomMetricGenerator)
     metricProto2 = MetricProto.new(randomMetricGenerator)
-    switch1 = newStandardSwitch(rng=rng)
-    switch2 = newStandardSwitch(rng=rng)
+    switch1 = newStandardSwitch(rng = rng)
+    switch2 = newStandardSwitch(rng = rng)
 
   switch1.mount(metricProto1)
 
@@ -148,14 +148,17 @@ proc main() {.async, gcsafe.} =
   await switch2.start()
 
   let
-    conn = await switch2.dial(switch1.peerInfo.peerId, switch1.peerInfo.addrs, metricProto2.codecs)
+    conn = await switch2.dial(
+      switch1.peerInfo.peerId, switch1.peerInfo.addrs, metricProto2.codecs
+    )
     metrics = await metricProto2.fetch(conn)
   await conn.close()
 
   for metric in metrics.metrics:
     echo metric.name, " = ", metric.value
 
-  await allFutures(switch1.stop(), switch2.stop()) # close connections and shutdown all transports
+  await allFutures(switch1.stop(), switch2.stop())
+    # close connections and shutdown all transports
 
 waitFor(main())
 

examples/tutorial_4_gossipsub.nim

@@ -7,7 +7,7 @@
 ## and allows to balance between latency, bandwidth usage,
 ## privacy and attack resistance.
 ##
-## You'll find a good explanation on how GossipSub works
+## You'll find a good explanation of how GossipSub works
 ## [here.](https://docs.libp2p.io/concepts/publish-subscribe/) There are a lot
 ## of parameters you can tweak to adjust how GossipSub behaves but here we'll
 ## use the sane defaults shipped with libp2p.
@@ -40,8 +40,8 @@ proc encode(m: Metric): ProtoBuffer =
 proc decode(_: type Metric, buf: seq[byte]): Result[Metric, ProtoError] =
   var res: Metric
   let pb = initProtoBuffer(buf)
-  discard ? pb.getField(1, res.name)
-  discard ? pb.getField(2, res.value)
+  discard ?pb.getField(1, res.name)
+  discard ?pb.getField(2, res.value)
   ok(res)
 
 proc encode(m: MetricList): ProtoBuffer =
@@ -56,11 +56,11 @@ proc decode(_: type MetricList, buf: seq[byte]): Result[MetricList, ProtoError]
     res: MetricList
     metrics: seq[seq[byte]]
   let pb = initProtoBuffer(buf)
-  discard ? pb.getRepeatedField(1, metrics)
+  discard ?pb.getRepeatedField(1, metrics)
 
   for metric in metrics:
-    res.metrics &= ? Metric.decode(metric)
-  ? pb.getRequiredField(2, res.hostname)
+    res.metrics &= ?Metric.decode(metric)
+  ?pb.getRequiredField(2, res.hostname)
   ok(res)
 
 ## This is exactly like the previous structure, except that we added
@@ -73,11 +73,14 @@ type Node = tuple[switch: Switch, gossip: GossipSub, hostname: string]
 
 proc oneNode(node: Node, rng: ref HmacDrbgContext) {.async.} =
   # This procedure will handle one of the node of the network
-  node.gossip.addValidator(["metrics"],
+  node.gossip.addValidator(
+    ["metrics"],
     proc(topic: string, message: Message): Future[ValidationResult] {.async.} =
       let decoded = MetricList.decode(message.data)
-      if decoded.isErr: return ValidationResult.Reject
+      if decoded.isErr:
+        return ValidationResult.Reject
       return ValidationResult.Accept
+    ,
   )
   # This "validator" will attach to the `metrics` topic and make sure
   # that every message in this topic is valid. This allows us to stop
@@ -87,23 +90,24 @@ proc oneNode(node: Node, rng: ref HmacDrbgContext) {.async.} =
   # `John` will be responsible to log the metrics, the rest of the nodes
   # will just forward them in the network
   if node.hostname == "John":
-    node.gossip.subscribe("metrics",
-      proc (topic: string, data: seq[byte]) {.async.} =
+    node.gossip.subscribe(
+      "metrics",
+      proc(topic: string, data: seq[byte]) {.async.} =
         echo MetricList.decode(data).tryGet()
+      ,
     )
   else:
     node.gossip.subscribe("metrics", nil)
 
   # Create random metrics 10 times and broadcast them
-  for _ in 0..<10:
+  for _ in 0 ..< 10:
     await sleepAsync(500.milliseconds)
     var metricList = MetricList(hostname: node.hostname)
     let metricCount = rng[].generate(uint32) mod 4
     for i in 0 ..< metricCount + 1:
-      metricList.metrics.add(Metric(
-        name: "metric_" & $i,
-        value: float(rng[].generate(uint16)) / 1000.0
-      ))
+      metricList.metrics.add(
+        Metric(name: "metric_" & $i, value: float(rng[].generate(uint16)) / 1000.0)
+      )
 
     discard await node.gossip.publish("metrics", encode(metricList).buffer)
   await node.switch.stop()
@@ -111,13 +115,13 @@ proc oneNode(node: Node, rng: ref HmacDrbgContext) {.async.} =
 ## For our main procedure, we'll create a few nodes, and connect them together.
 ## Note that they are not all interconnected, but GossipSub will take care of
 ## broadcasting to the full network nonetheless.
-proc main {.async.} =
+proc main() {.async.} =
   let rng = newRng()
   var nodes: seq[Node]
 
   for hostname in ["John", "Walter", "David", "Thuy", "Amy"]:
     let
-      switch = newStandardSwitch(rng=rng)
+      switch = newStandardSwitch(rng = rng)
       gossip = GossipSub.init(switch = switch, triggerSelf = true)
     switch.mount(gossip)
     await switch.start()
@@ -127,11 +131,12 @@ proc main {.async.} =
   for index, node in nodes:
     # Connect to a few neighbors
     for otherNodeIdx in index - 1 .. index + 2:
-      if otherNodeIdx notin 0 ..< nodes.len or otherNodeIdx == index: continue
+      if otherNodeIdx notin 0 ..< nodes.len or otherNodeIdx == index:
+        continue
       let otherNode = nodes[otherNodeIdx]
       await node.switch.connect(
-        otherNode.switch.peerInfo.peerId,
-        otherNode.switch.peerInfo.addrs)
+        otherNode.switch.peerInfo.peerId, otherNode.switch.peerInfo.addrs
+      )
 
   var allFuts: seq[Future[void]]
   for node in nodes:

examples/tutorial_5_discovery.nim

@@ -2,7 +2,7 @@
 ##
 ## In the [previous tutorial](tutorial_4_gossipsub.md), we built a custom protocol using [protobuf](https://developers.google.com/protocol-buffers) and
 ## spread informations (some metrics) on the network using gossipsub.
-## For this tutorial, on the other hand, we'll go back on a simple example
+## For this tutorial, on the other hand, we'll go back to a simple example
 ## we'll try to discover a specific peers to greet on the network.
 ##
 ## First, as usual, we import the dependencies:
@@ -20,22 +20,24 @@ import libp2p/discovery/discoverymngr
 ##
 ## Note that other discovery methods such as [Kademlia](https://github.com/libp2p/specs/blob/master/kad-dht/README.md) or [discv5](https://github.com/ethereum/devp2p/blob/master/discv5/discv5.md) exist.
 proc createSwitch(rdv: RendezVous = RendezVous.new()): Switch =
-  SwitchBuilder.new()
-    .withRng(newRng())
-    .withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
-    .withTcpTransport()
-    .withYamux()
-    .withNoise()
-    .withRendezVous(rdv)
-    .build()
+  SwitchBuilder
+  .new()
+  .withRng(newRng())
+  .withAddresses(@[MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()])
+  .withTcpTransport()
+  .withYamux()
+  .withNoise()
+  .withRendezVous(rdv)
+  .build()
 
 # Create a really simple protocol to log one message received then close the stream
 const DumbCodec = "/dumb/proto/1.0.0"
 type DumbProto = ref object of LPProtocol
 proc new(T: typedesc[DumbProto], nodeNumber: int): T =
-  proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     echo "Node", nodeNumber, " received: ", string.fromBytes(await conn.readLp(1024))
     await conn.close()
+
   return T.new(codecs = @[DumbCodec], handler = handle)
 
 ## ## Bootnodes
@@ -49,7 +51,7 @@ proc new(T: typedesc[DumbProto], nodeNumber: int): T =
 ## (rendezvous in this case) as a bootnode. For this example, we'll
 ## create a bootnode, and then every peer will advertise itself on the
 ## bootnode, and use it to find other peers
-proc main() {.async, gcsafe.} =
+proc main() {.async.} =
   let bootNode = createSwitch()
   await bootNode.start()
 
@@ -58,7 +60,7 @@ proc main() {.async, gcsafe.} =
     switches: seq[Switch] = @[]
     discManagers: seq[DiscoveryManager] = @[]
 
-  for i in 0..5:
+  for i in 0 .. 5:
     let rdv = RendezVous.new()
     # Create a remote future to await at the end of the program
     let switch = createSwitch(rdv)
@@ -93,7 +95,7 @@ proc main() {.async, gcsafe.} =
 
   # Use the discovery manager to find peers on the OddClub topic to greet them
   let queryOddClub = dm.request(RdvNamespace("OddClub"))
-  for _ in 0..2:
+  for _ in 0 .. 2:
     let
       # getPeer give you a PeerAttribute containing informations about the peer.
       res = await queryOddClub.getPeer()
@@ -109,7 +111,7 @@ proc main() {.async, gcsafe.} =
 
   # Maybe it was because he wanted to join the EvenGang
   let queryEvenGang = dm.request(RdvNamespace("EvenGang"))
-  for _ in 0..2:
+  for _ in 0 .. 2:
     let
       res = await queryEvenGang.getPeer()
       conn = await newcomer.dial(res[PeerId], res.getAll(MultiAddress), DumbCodec)

examples/tutorial_6_game.nim

@@ -51,7 +51,7 @@ proc new(_: type[Game]): Game =
     tickTime: -3.0, # 3 seconds of "warm-up" time
     localPlayer: Player(x: 4, y: 16, currentDir: 3, nextDir: 3, color: 8),
     remotePlayer: Player(x: 27, y: 16, currentDir: 1, nextDir: 1, color: 12),
-    peerFound: newFuture[Connection]()
+    peerFound: newFuture[Connection](),
   )
   for pos in 0 .. result.gameMap.high:
     if pos mod mapSize in [0, mapSize - 1] or pos div mapSize in [0, mapSize - 1]:
@@ -81,7 +81,8 @@ proc update(g: Game, dt: float32) =
   # This is a hacky way to make this happen
   waitFor(sleepAsync(1.milliseconds))
   # Don't do anything if we are still waiting for an opponent
-  if not(g.peerFound.finished()) or isNil(g.tickFinished): return
+  if not (g.peerFound.finished()) or isNil(g.tickFinished):
+    return
   g.tickTime += dt
 
   # Update the wanted direction, making sure we can't go backward
@@ -98,7 +99,8 @@ proc tick(g: Game, p: Player) =
   # Move player and check if he lost
   p.x += directions[p.currentDir][1]
   p.y += directions[p.currentDir][2]
-  if g.gameMap[p.y * mapSize + p.x] != 0: p.lost = true
+  if g.gameMap[p.y * mapSize + p.x] != 0:
+    p.lost = true
   g.gameMap[p.y * mapSize + p.x] = p.color
 
 proc mainLoop(g: Game, peer: Connection) {.async.} =
@@ -123,16 +125,23 @@ proc draw(g: Game) =
   for pos, color in g.gameMap:
     setColor(color)
     boxFill(pos mod 32 * 4, pos div 32 * 4, 4, 4)
-  let text = if not(g.peerFound.finished()): "Matchmaking.."
-             elif g.tickTime < -1.5: "Welcome to Etron"
-             elif g.tickTime < 0.0: "- " & $(int(abs(g.tickTime) / 0.5) + 1) & " -"
-             elif g.remotePlayer.lost and g.localPlayer.lost: "DEUCE"
-             elif g.localPlayer.lost: "YOU LOOSE"
-             elif g.remotePlayer.lost: "YOU WON"
-             else: ""
+  let text =
+    if not (g.peerFound.finished()):
+      "Matchmaking.."
+    elif g.tickTime < -1.5:
+      "Welcome to Etron"
+    elif g.tickTime < 0.0:
+      "- " & $(int(abs(g.tickTime) / 0.5) + 1) & " -"
+    elif g.remotePlayer.lost and g.localPlayer.lost:
+      "DEUCE"
+    elif g.localPlayer.lost:
+      "YOU LOOSE"
+    elif g.remotePlayer.lost:
+      "YOU WON"
+    else:
+      ""
   printc(text, screenWidth div 2, screenHeight div 2)
 
-
 ## ## Matchmaking
 ## To find an opponent, we will broadcast our address on a
 ## GossipSub topic, and wait for someone to connect to us.
@@ -143,8 +152,9 @@ proc draw(g: Game) =
 ## peer know that we are available, check that he is also available,
 ## and launch the game.
 proc new(T: typedesc[GameProto], g: Game): T =
-  proc handle(conn: Connection, proto: string) {.async, gcsafe.} =
-    defer: await conn.closeWithEof()
+  proc handle(conn: Connection, proto: string) {.async.} =
+    defer:
+      await conn.closeWithEof()
     if g.peerFound.finished or g.hasCandidate:
       await conn.close()
       return
@@ -157,6 +167,7 @@ proc new(T: typedesc[GameProto], g: Game): T =
     # The handler of a protocol must wait for the stream to
     # be finished before returning
     await conn.join()
+
   return T.new(codecs = @["/tron/1.0.0"], handler = handle)
 
 proc networking(g: Game) {.async.} =
@@ -164,9 +175,10 @@ proc networking(g: Game) {.async.} =
   # the Discovery examples combined
   let
     rdv = RendezVous.new()
-    switch = SwitchBuilder.new()
+    switch = SwitchBuilder
+      .new()
       .withRng(newRng())
-      .withAddresses(@[ MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet() ])
+      .withAddresses(@[MultiAddress.init("/ip4/0.0.0.0/tcp/0").tryGet()])
       .withTcpTransport()
       .withYamux()
       .withNoise()
@@ -174,9 +186,7 @@ proc networking(g: Game) {.async.} =
       .build()
     dm = DiscoveryManager()
     gameProto = GameProto.new(g)
-    gossip = GossipSub.init(
-      switch = switch,
-      triggerSelf = false)
+    gossip = GossipSub.init(switch = switch, triggerSelf = false)
   dm.add(RendezVousInterface.new(rdv))
 
   switch.mount(gossip)
@@ -184,10 +194,11 @@ proc networking(g: Game) {.async.} =
 
   gossip.subscribe(
     "/tron/matchmaking",
-    proc (topic: string, data: seq[byte]) {.async.} =
+    proc(topic: string, data: seq[byte]) {.async.} =
       # If we are still looking for an opponent,
-      # try to match anyone broadcasting it's address
-      if g.peerFound.finished or g.hasCandidate: return
+      # try to match anyone broadcasting its address
+      if g.peerFound.finished or g.hasCandidate:
+        return
       g.hasCandidate = true
 
       try:
@@ -204,10 +215,12 @@ proc networking(g: Game) {.async.} =
         swap(g.localPlayer, g.remotePlayer)
       except CatchableError as exc:
         discard
+    ,
   )
 
   await switch.start()
-  defer: await switch.stop()
+  defer:
+    await switch.stop()
 
   # As explained in the last tutorial, we need a bootnode to be able
   # to find peers. We could use any libp2p running rendezvous (or any
@@ -243,7 +256,8 @@ proc networking(g: Game) {.async.} =
 
   # We now wait for someone to connect to us (or for us to connect to someone)
   let peerConn = await g.peerFound
-  defer: await peerConn.closeWithEof()
+  defer:
+    await peerConn.closeWithEof()
 
   await g.mainLoop(peerConn)
 
@@ -252,7 +266,17 @@ let
   netFut = networking(game)
 nico.init("Status", "Tron")
 nico.createWindow("Tron", mapSize * 4, mapSize * 4, 4, false)
-nico.run(proc = discard, proc(dt: float32) = game.update(dt), proc = game.draw())
+nico.run(
+  proc() =
+    discard
+  ,
+  proc(dt: float32) =
+    game.update(dt)
+  ,
+  proc() =
+    game.draw()
+  ,
+)
 waitFor(netFut.cancelAndWait())
 
 ## And that's it! If you want to run this code locally, the simplest way is to use the

libp2p.nim

@@ -21,7 +21,8 @@ when defined(nimdoc):
   ## that can help you get started.
 
   # Import stuff for doc
-  import libp2p/[
+  import
+    libp2p/[
       protobuf/minprotobuf,
       switch,
       stream/lpstream,
@@ -33,40 +34,39 @@ when defined(nimdoc):
       peerid,
       peerinfo,
       peerstore,
-      multiaddress]
+      multiaddress,
+    ]
 
   proc dummyPrivateProc*() =
     ## A private proc example
     discard
+
 else:
   import
-    libp2p/[protobuf/minprotobuf,
-            muxers/muxer,
-            muxers/mplex/mplex,
-            stream/lpstream,
-            stream/bufferstream,
-            stream/connection,
-            transports/transport,
-            transports/tcptransport,
-            transports/wstransport,
-            protocols/secure/noise,
-            protocols/ping,
-            cid,
-            multihash,
-            multibase,
-            multicodec,
-            errors,
-            switch,
-            peerid,
-            peerinfo,
-            multiaddress,
-            builders,
-            crypto/crypto,
-            protocols/pubsub]
+    libp2p/[
+      protobuf/minprotobuf,
+      muxers/muxer,
+      muxers/mplex/mplex,
+      stream/lpstream,
+      stream/bufferstream,
+      stream/connection,
+      transports/transport,
+      transports/tcptransport,
+      protocols/secure/noise,
+      cid,
+      multihash,
+      multicodec,
+      errors,
+      switch,
+      peerid,
+      peerinfo,
+      multiaddress,
+      builders,
+      crypto/crypto,
+      protocols/pubsub,
+    ]
 
   export
-    minprotobuf, switch, peerid, peerinfo,
-    connection, multiaddress, crypto, lpstream,
-    bufferstream, muxer, mplex, transport,
-    tcptransport, noise, errors, cid, multihash,
+    minprotobuf, switch, peerid, peerinfo, connection, multiaddress, crypto, lpstream,
+    bufferstream, muxer, mplex, transport, tcptransport, noise, errors, cid, multihash,
     multicodec, builders, pubsub

libp2p.nimble

@@ -1,30 +1,33 @@
 mode = ScriptMode.Verbose
 
-packageName   = "libp2p"
-version       = "1.0.0"
-author        = "Status Research & Development GmbH"
-description   = "LibP2P implementation"
-license       = "MIT"
-skipDirs      = @["tests", "examples", "Nim", "tools", "scripts", "docs"]
+packageName = "libp2p"
+version = "1.4.0"
+author = "Status Research & Development GmbH"
+description = "LibP2P implementation"
+license = "MIT"
+skipDirs = @["tests", "examples", "Nim", "tools", "scripts", "docs"]
 
-requires "nim >= 1.2.0",
-         "nimcrypto >= 0.4.1",
-         "dnsclient >= 0.3.0 & < 0.4.0",
-         "bearssl >= 0.1.4",
-         "chronicles >= 0.10.2",
-         "chronos >= 3.0.6",
-         "metrics",
-         "secp256k1",
-         "stew#head",
-         "websock",
-         "unittest2 >= 0.0.5 & < 0.1.0"
+requires "nim >= 1.6.0",
+  "nimcrypto >= 0.4.1", "dnsclient >= 0.3.0 & < 0.4.0", "bearssl >= 0.2.5",
+  "chronicles >= 0.10.2", "chronos >= 4.0.2", "metrics", "secp256k1", "stew#head",
+  "websock", "unittest2"
 
-import hashes
-proc runTest(filename: string, verify: bool = true, sign: bool = true,
-             moreoptions: string = "") =
-  var excstr = "nim c --skipParentCfg --opt:speed -d:debug "
-  excstr.add(" " & getEnv("NIMFLAGS") & " ")
-  excstr.add(" --verbosity:0 --hints:off ")
+let nimc = getEnv("NIMC", "nim") # Which nim compiler to use
+let lang = getEnv("NIMLANG", "c") # Which backend (c/cpp/js)
+let flags = getEnv("NIMFLAGS", "") # Extra flags for the compiler
+let verbose = getEnv("V", "") notin ["", "0"]
+
+let cfg =
+  " --styleCheck:usages --styleCheck:error" &
+  (if verbose: "" else: " --verbosity:0 --hints:off") &
+  " --skipParentCfg --skipUserCfg -f" & " --threads:on --opt:speed"
+
+import hashes, strutils
+
+proc runTest(
+    filename: string, verify: bool = true, sign: bool = true, moreoptions: string = ""
+) =
+  var excstr = nimc & " " & lang & " -d:debug " & cfg & " " & flags
   excstr.add(" -d:libp2p_pubsub_sign=" & $sign)
   excstr.add(" -d:libp2p_pubsub_verify=" & $verify)
   excstr.add(" " & moreoptions & " ")
@@ -34,7 +37,7 @@ proc runTest(filename: string, verify: bool = true, sign: bool = true,
   rmFile "tests/" & filename.toExe
 
 proc buildSample(filename: string, run = false, extraFlags = "") =
-  var excstr = "nim c --opt:speed --threads:on -d:debug --verbosity:0 --hints:off -p:. " & extraFlags
+  var excstr = nimc & " " & lang & " " & cfg & " " & flags & " -p:. " & extraFlags
   excstr.add(" examples/" & filename)
   exec excstr
   if run:
@@ -42,7 +45,8 @@ proc buildSample(filename: string, run = false, extraFlags = "") =
   rmFile "examples/" & filename.toExe
 
 proc tutorialToMd(filename: string) =
-  let markdown = gorge "cat " & filename & " | nim c -r --verbosity:0 --hints:off tools/markdown_builder.nim "
+  let markdown = gorge "cat " & filename & " | " & nimc & " " & lang &
+    " -r --verbosity:0 --hints:off tools/markdown_builder.nim "
   writeFile(filename.replace(".nim", ".md"), markdown)
 
 task testnative, "Runs libp2p native tests":
@@ -55,24 +59,37 @@ task testinterop, "Runs interop tests":
   runTest("testinterop")
 
 task testpubsub, "Runs pubsub tests":
-  runTest("pubsub/testgossipinternal", sign = false, verify = false, moreoptions = "-d:pubsub_internal_testing")
+  runTest(
+    "pubsub/testgossipinternal",
+    sign = false,
+    verify = false,
+    moreoptions = "-d:pubsub_internal_testing",
+  )
   runTest("pubsub/testpubsub")
   runTest("pubsub/testpubsub", sign = false, verify = false)
-  runTest("pubsub/testpubsub", sign = false, verify = false, moreoptions = "-d:libp2p_pubsub_anonymize=true")
+  runTest(
+    "pubsub/testpubsub",
+    sign = false,
+    verify = false,
+    moreoptions = "-d:libp2p_pubsub_anonymize=true",
+  )
 
 task testpubsub_slim, "Runs pubsub tests":
-  runTest("pubsub/testgossipinternal", sign = false, verify = false, moreoptions = "-d:pubsub_internal_testing")
+  runTest(
+    "pubsub/testgossipinternal",
+    sign = false,
+    verify = false,
+    moreoptions = "-d:pubsub_internal_testing",
+  )
   runTest("pubsub/testpubsub")
 
 task testfilter, "Run PKI filter test":
-  runTest("testpkifilter",
-           moreoptions = "-d:libp2p_pki_schemes=\"secp256k1\"")
-  runTest("testpkifilter",
-           moreoptions = "-d:libp2p_pki_schemes=\"secp256k1;ed25519\"")
-  runTest("testpkifilter",
-           moreoptions = "-d:libp2p_pki_schemes=\"secp256k1;ed25519;ecnist\"")
-  runTest("testpkifilter",
-           moreoptions = "-d:libp2p_pki_schemes=")
+  runTest("testpkifilter", moreoptions = "-d:libp2p_pki_schemes=\"secp256k1\"")
+  runTest("testpkifilter", moreoptions = "-d:libp2p_pki_schemes=\"secp256k1;ed25519\"")
+  runTest(
+    "testpkifilter", moreoptions = "-d:libp2p_pki_schemes=\"secp256k1;ed25519;ecnist\""
+  )
+  runTest("testpkifilter", moreoptions = "-d:libp2p_pki_schemes=")
 
 task test, "Runs the test suite":
   exec "nimble testnative"
@@ -104,15 +121,13 @@ task examples_build, "Build the samples":
   buildSample("circuitrelay", true)
   buildSample("tutorial_1_connect", true)
   buildSample("tutorial_2_customproto", true)
-  if (NimMajor, NimMinor) > (1, 2):
-    # These tutorials relies on post 1.4 exception tracking
-    buildSample("tutorial_3_protobuf", true)
-    buildSample("tutorial_4_gossipsub", true)
-    buildSample("tutorial_5_discovery", true)
-    # Nico doesn't work in 1.2
-    exec "nimble install -y nimpng@#HEAD" # this is to fix broken build on 1.7.3, remove it when nimpng version 0.3.2 or later is released
-    exec "nimble install -y nico"
-    buildSample("tutorial_6_game", false, "--styleCheck:off")
+  buildSample("tutorial_3_protobuf", true)
+  buildSample("tutorial_4_gossipsub", true)
+  buildSample("tutorial_5_discovery", true)
+  exec "nimble install -y nimpng@#HEAD"
+    # this is to fix broken build on 1.7.3, remove it when nimpng version 0.3.2 or later is released
+  exec "nimble install -y nico@#af99dd60bf2b395038ece815ea1012330a80d6e6"
+  buildSample("tutorial_6_game", false, "--styleCheck:off")
 
 # pin system
 # while nimble lockfile
@@ -123,12 +138,14 @@ task pin, "Create a lockfile":
   # pinner.nim was originally here
   # but you can't read output from
   # a command in a nimscript
-  exec "nim c -r tools/pinner.nim"
+  exec nimc & " c -r tools/pinner.nim"
 
 import sequtils
 import os
 task install_pinned, "Reads the lockfile":
-  let toInstall = readFile(PinFile).splitWhitespace().mapIt((it.split(";", 1)[0], it.split(";", 1)[1]))
+  let toInstall = readFile(PinFile).splitWhitespace().mapIt(
+      (it.split(";", 1)[0], it.split(";", 1)[1])
+    )
   # [('packageName', 'packageFullUri')]
 
   rmDir("nimbledeps")
@@ -138,8 +155,7 @@ task install_pinned, "Reads the lockfile":
   # Remove the automatically installed deps
   # (inefficient you say?)
   let nimblePkgs =
-    if system.dirExists("nimbledeps/pkgs"): "nimbledeps/pkgs"
-    else: "nimbledeps/pkgs2"
+    if system.dirExists("nimbledeps/pkgs"): "nimbledeps/pkgs" else: "nimbledeps/pkgs2"
   for dependency in listDirs(nimblePkgs):
     let
       fileName = dependency.extractFilename
@@ -147,14 +163,12 @@ task install_pinned, "Reads the lockfile":
       packageName = fileName.split('-')[0]
 
     if toInstall.anyIt(
-        it[0] == packageName and
-        (
-          it[1].split('#')[^1] in fileContent or # nimble for nim 2.X
-          fileName.endsWith(it[1].split('#')[^1]) # nimble for nim 1.X
-        )
-      ) == false or
-      fileName.split('-')[^1].len < 20: # safegard for nimble for nim 1.X
-        rmDir(dependency)
+      it[0] == packageName and (
+        it[1].split('#')[^1] in fileContent or # nimble for nim 2.X
+        fileName.endsWith(it[1].split('#')[^1]) # nimble for nim 1.X
+      )
+    ) == false or fileName.split('-')[^1].len < 20: # safegard for nimble for nim 1.X
+      rmDir(dependency)
 
 task unpin, "Restore global package use":
   rmDir("nimbledeps")

libp2p/builders.nim

@@ -9,38 +9,39 @@
 
 ## This module contains a Switch Building helper.
 runnableExamples:
-  let switch =
-   SwitchBuilder.new()
-   .withRng(rng)
-   .withAddresses(multiaddress)
-   # etc
-   .build()
+  let switch = SwitchBuilder.new().withRng(rng).withAddresses(multiaddress)
+    # etc
+    .build()
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
+import options, tables, chronos, chronicles, sequtils
 import
-  options, tables, chronos, chronicles, sequtils,
-  switch, peerid, peerinfo, stream/connection, multiaddress,
-  crypto/crypto, transports/[transport, tcptransport],
+  switch,
+  peerid,
+  peerinfo,
+  stream/connection,
+  multiaddress,
+  crypto/crypto,
+  transports/[transport, tcptransport],
   muxers/[muxer, mplex/mplex, yamux/yamux],
   protocols/[identify, secure/secure, secure/noise, rendezvous],
   protocols/connectivity/[autonat/server, relay/relay, relay/client, relay/rtransport],
-  connmanager, upgrademngrs/muxedupgrade,
+  connmanager,
+  upgrademngrs/muxedupgrade,
+  observedaddrmanager,
   nameresolving/nameresolver,
-  errors, utility
+  errors,
+  utility
+import services/wildcardresolverservice
 
-export
-  switch, peerid, peerinfo, connection, multiaddress, crypto, errors
+export switch, peerid, peerinfo, connection, multiaddress, crypto, errors
 
 type
-  TransportProvider* {.public.} = proc(upgr: Upgrade): Transport {.gcsafe, raises: [Defect].}
+  TransportProvider* {.public.} = proc(upgr: Upgrade): Transport {.gcsafe, raises: [].}
 
   SecureProtocol* {.pure.} = enum
-    Noise,
-    Secio {.deprecated.}
+    Noise
 
   SwitchBuilder* = ref object
     privKey: Option[PrivateKey]
@@ -57,18 +58,19 @@ type
     protoVersion: string
     agentVersion: string
     nameResolver: NameResolver
-    peerStoreCapacity: Option[int]
+    peerStoreCapacity: Opt[int]
     autonat: bool
     circuitRelay: Relay
     rdv: RendezVous
     services: seq[Service]
+    observedAddrManager: ObservedAddrManager
+    enableWildcardResolver: bool
 
 proc new*(T: type[SwitchBuilder]): T {.public.} =
   ## Creates a SwitchBuilder
 
-  let address = MultiAddress
-  .init("/ip4/127.0.0.1/tcp/0")
-  .expect("Should initialize to default")
+  let address =
+    MultiAddress.init("/ip4/127.0.0.1/tcp/0").expect("Should initialize to default")
 
   SwitchBuilder(
     privKey: none(PrivateKey),
@@ -79,53 +81,59 @@ proc new*(T: type[SwitchBuilder]): T {.public.} =
     maxOut: -1,
     maxConnsPerPeer: MaxConnectionsPerPeer,
     protoVersion: ProtoVersion,
-    agentVersion: AgentVersion)
+    agentVersion: AgentVersion,
+    enableWildcardResolver: true,
+  )
 
-proc withPrivateKey*(b: SwitchBuilder, privateKey: PrivateKey): SwitchBuilder {.public.} =
+proc withPrivateKey*(
+    b: SwitchBuilder, privateKey: PrivateKey
+): SwitchBuilder {.public.} =
   ## Set the private key of the switch. Will be used to
   ## generate a PeerId
 
   b.privKey = some(privateKey)
   b
 
-proc withAddress*(b: SwitchBuilder, address: MultiAddress): SwitchBuilder {.public.} =
-  ## | Set the listening address of the switch
-  ## | Calling it multiple time will override the value
-
-  b.addresses = @[address]
-  b
-
-proc withAddresses*(b: SwitchBuilder, addresses: seq[MultiAddress]): SwitchBuilder {.public.} =
+proc withAddresses*(
+    b: SwitchBuilder, addresses: seq[MultiAddress], enableWildcardResolver: bool = true
+): SwitchBuilder {.public.} =
   ## | Set the listening addresses of the switch
   ## | Calling it multiple time will override the value
-
   b.addresses = addresses
+  b.enableWildcardResolver = enableWildcardResolver
   b
 
+proc withAddress*(
+    b: SwitchBuilder, address: MultiAddress, enableWildcardResolver: bool = true
+): SwitchBuilder {.public.} =
+  ## | Set the listening address of the switch
+  ## | Calling it multiple time will override the value
+  b.withAddresses(@[address], enableWildcardResolver)
+
 proc withSignedPeerRecord*(b: SwitchBuilder, sendIt = true): SwitchBuilder {.public.} =
   b.sendSignedPeerRecord = sendIt
   b
 
 proc withMplex*(
-    b: SwitchBuilder,
-    inTimeout = 5.minutes,
-    outTimeout = 5.minutes,
-    maxChannCount = 200): SwitchBuilder {.public.} =
+    b: SwitchBuilder, inTimeout = 5.minutes, outTimeout = 5.minutes, maxChannCount = 200
+): SwitchBuilder {.public.} =
   ## | Uses `Mplex <https://docs.libp2p.io/concepts/stream-multiplexing/#mplex>`_ as a multiplexer
   ## | `Timeout` is the duration after which a inactive connection will be closed
   proc newMuxer(conn: Connection): Muxer =
-    Mplex.new(
-      conn,
-      inTimeout,
-      outTimeout,
-      maxChannCount)
+    Mplex.new(conn, inTimeout, outTimeout, maxChannCount)
 
   assert b.muxers.countIt(it.codec == MplexCodec) == 0, "Mplex build multiple times"
   b.muxers.add(MuxerProvider.new(newMuxer, MplexCodec))
   b
 
-proc withYamux*(b: SwitchBuilder): SwitchBuilder =
-  proc newMuxer(conn: Connection): Muxer = Yamux.new(conn)
+proc withYamux*(
+    b: SwitchBuilder,
+    windowSize: int = YamuxDefaultWindowSize,
+    inTimeout: Duration = 5.minutes,
+    outTimeout: Duration = 5.minutes,
+): SwitchBuilder =
+  proc newMuxer(conn: Connection): Muxer =
+    Yamux.new(conn, windowSize, inTimeout = inTimeout, outTimeout = outTimeout)
 
   assert b.muxers.countIt(it.codec == YamuxCodec) == 0, "Yamux build multiple times"
   b.muxers.add(MuxerProvider.new(newMuxer, YamuxCodec))
@@ -135,24 +143,36 @@ proc withNoise*(b: SwitchBuilder): SwitchBuilder {.public.} =
   b.secureManagers.add(SecureProtocol.Noise)
   b
 
-proc withTransport*(b: SwitchBuilder, prov: TransportProvider): SwitchBuilder {.public.} =
+proc withTransport*(
+    b: SwitchBuilder, prov: TransportProvider
+): SwitchBuilder {.public.} =
   ## Use a custom transport
   runnableExamples:
-    let switch =
-      SwitchBuilder.new()
-      .withTransport(proc(upgr: Upgrade): Transport = TcpTransport.new(flags, upgr))
+    let switch = SwitchBuilder
+      .new()
+      .withTransport(
+        proc(upgr: Upgrade): Transport =
+          TcpTransport.new(flags, upgr)
+      )
       .build()
   b.transports.add(prov)
   b
 
-proc withTcpTransport*(b: SwitchBuilder, flags: set[ServerFlags] = {}): SwitchBuilder {.public.} =
-  b.withTransport(proc(upgr: Upgrade): Transport = TcpTransport.new(flags, upgr))
+proc withTcpTransport*(
+    b: SwitchBuilder, flags: set[ServerFlags] = {}
+): SwitchBuilder {.public.} =
+  b.withTransport(
+    proc(upgr: Upgrade): Transport =
+      TcpTransport.new(flags, upgr)
+  )
 
 proc withRng*(b: SwitchBuilder, rng: ref HmacDrbgContext): SwitchBuilder {.public.} =
   b.rng = rng
   b
 
-proc withMaxConnections*(b: SwitchBuilder, maxConnections: int): SwitchBuilder {.public.} =
+proc withMaxConnections*(
+    b: SwitchBuilder, maxConnections: int
+): SwitchBuilder {.public.} =
   ## Maximum concurrent connections of the switch. You should either use this, or
   ## `withMaxIn <#withMaxIn,SwitchBuilder,int>`_ & `withMaxOut<#withMaxOut,SwitchBuilder,int>`_
   b.maxConnections = maxConnections
@@ -168,23 +188,31 @@ proc withMaxOut*(b: SwitchBuilder, maxOut: int): SwitchBuilder {.public.} =
   b.maxOut = maxOut
   b
 
-proc withMaxConnsPerPeer*(b: SwitchBuilder, maxConnsPerPeer: int): SwitchBuilder {.public.} =
+proc withMaxConnsPerPeer*(
+    b: SwitchBuilder, maxConnsPerPeer: int
+): SwitchBuilder {.public.} =
   b.maxConnsPerPeer = maxConnsPerPeer
   b
 
 proc withPeerStore*(b: SwitchBuilder, capacity: int): SwitchBuilder {.public.} =
-  b.peerStoreCapacity = some(capacity)
+  b.peerStoreCapacity = Opt.some(capacity)
   b
 
-proc withProtoVersion*(b: SwitchBuilder, protoVersion: string): SwitchBuilder {.public.} =
+proc withProtoVersion*(
+    b: SwitchBuilder, protoVersion: string
+): SwitchBuilder {.public.} =
   b.protoVersion = protoVersion
   b
 
-proc withAgentVersion*(b: SwitchBuilder, agentVersion: string): SwitchBuilder {.public.} =
+proc withAgentVersion*(
+    b: SwitchBuilder, agentVersion: string
+): SwitchBuilder {.public.} =
   b.agentVersion = agentVersion
   b
 
-proc withNameResolver*(b: SwitchBuilder, nameResolver: NameResolver): SwitchBuilder {.public.} =
+proc withNameResolver*(
+    b: SwitchBuilder, nameResolver: NameResolver
+): SwitchBuilder {.public.} =
   b.nameResolver = nameResolver
   b
 
@@ -196,7 +224,9 @@ proc withCircuitRelay*(b: SwitchBuilder, r: Relay = Relay.new()): SwitchBuilder
   b.circuitRelay = r
   b
 
-proc withRendezVous*(b: SwitchBuilder, rdv: RendezVous = RendezVous.new()): SwitchBuilder =
+proc withRendezVous*(
+    b: SwitchBuilder, rdv: RendezVous = RendezVous.new()
+): SwitchBuilder =
   b.rdv = rdv
   b
 
@@ -204,40 +234,44 @@ proc withServices*(b: SwitchBuilder, services: seq[Service]): SwitchBuilder =
   b.services = services
   b
 
-proc build*(b: SwitchBuilder): Switch
-  {.raises: [Defect, LPError], public.} =
+proc withObservedAddrManager*(
+    b: SwitchBuilder, observedAddrManager: ObservedAddrManager
+): SwitchBuilder =
+  b.observedAddrManager = observedAddrManager
+  b
 
+proc build*(b: SwitchBuilder): Switch {.raises: [LPError], public.} =
   if b.rng == nil: # newRng could fail
     raise newException(Defect, "Cannot initialize RNG")
 
   let pkRes = PrivateKey.random(b.rng[])
-  let
-    seckey = b.privKey.get(otherwise = pkRes.expect("Expected default Private Key"))
+  let seckey = b.privKey.get(otherwise = pkRes.expect("Expected default Private Key"))
 
-  var
-    secureManagerInstances: seq[Secure]
+  var secureManagerInstances: seq[Secure]
   if SecureProtocol.Noise in b.secureManagers:
     secureManagerInstances.add(Noise.new(b.rng, seckey).Secure)
 
-  let
-    peerInfo = PeerInfo.new(
-      seckey,
-      b.addresses,
-      protoVersion = b.protoVersion,
-      agentVersion = b.agentVersion)
+  let peerInfo = PeerInfo.new(
+    seckey, b.addresses, protoVersion = b.protoVersion, agentVersion = b.agentVersion
+  )
+
+  let identify =
+    if b.observedAddrManager != nil:
+      Identify.new(peerInfo, b.sendSignedPeerRecord, b.observedAddrManager)
+    else:
+      Identify.new(peerInfo, b.sendSignedPeerRecord)
 
   let
-    identify = Identify.new(peerInfo, b.sendSignedPeerRecord)
-    connManager = ConnManager.new(b.maxConnsPerPeer, b.maxConnections, b.maxIn, b.maxOut)
+    connManager =
+      ConnManager.new(b.maxConnsPerPeer, b.maxConnections, b.maxIn, b.maxOut)
     ms = MultistreamSelect.new()
-    muxedUpgrade = MuxedUpgrade.new(identify, b.muxers, secureManagerInstances, connManager, ms)
+    muxedUpgrade = MuxedUpgrade.new(b.muxers, secureManagerInstances, ms)
 
-  let
-    transports = block:
-      var transports: seq[Transport]
-      for tProvider in b.transports:
-        transports.add(tProvider(muxedUpgrade))
-      transports
+  let transports = block:
+    var transports: seq[Transport]
+    for tProvider in b.transports:
+      transports.add(tProvider(muxedUpgrade))
+    transports
 
   if b.secureManagers.len == 0:
     b.secureManagers &= SecureProtocol.Noise
@@ -245,22 +279,27 @@ proc build*(b: SwitchBuilder): Switch
   if isNil(b.rng):
     b.rng = newRng()
 
-  let peerStore =
-    if isSome(b.peerStoreCapacity):
-      PeerStore.new(b.peerStoreCapacity.get())
+  let peerStore = block:
+    b.peerStoreCapacity.withValue(capacity):
+      PeerStore.new(identify, capacity)
     else:
-      PeerStore.new()
+      PeerStore.new(identify)
+
+  if b.enableWildcardResolver:
+    b.services.insert(WildcardAddressResolverService.new(), 0)
 
   let switch = newSwitch(
     peerInfo = peerInfo,
     transports = transports,
-    identity = identify,
     secureManagers = secureManagerInstances,
     connManager = connManager,
     ms = ms,
     nameResolver = b.nameResolver,
     peerStore = peerStore,
-    services = b.services)
+    services = b.services,
+  )
+
+  switch.mount(identify)
 
   if b.autonat:
     let autonat = Autonat.new(switch)
@@ -279,29 +318,28 @@ proc build*(b: SwitchBuilder): Switch
   return switch
 
 proc newStandardSwitch*(
-  privKey = none(PrivateKey),
-  addrs: MultiAddress | seq[MultiAddress] = MultiAddress.init("/ip4/127.0.0.1/tcp/0").tryGet(),
-  secureManagers: openArray[SecureProtocol] = [
-      SecureProtocol.Noise,
-    ],
-  transportFlags: set[ServerFlags] = {},
-  rng = newRng(),
-  inTimeout: Duration = 5.minutes,
-  outTimeout: Duration = 5.minutes,
-  maxConnections = MaxConnections,
-  maxIn = -1,
-  maxOut = -1,
-  maxConnsPerPeer = MaxConnectionsPerPeer,
-  nameResolver: NameResolver = nil,
-  sendSignedPeerRecord = false,
-  peerStoreCapacity = 1000): Switch
-  {.raises: [Defect, LPError], public.} =
+    privKey = none(PrivateKey),
+    addrs: MultiAddress | seq[MultiAddress] =
+      MultiAddress.init("/ip4/127.0.0.1/tcp/0").expect("valid address"),
+    secureManagers: openArray[SecureProtocol] = [SecureProtocol.Noise],
+    transportFlags: set[ServerFlags] = {},
+    rng = newRng(),
+    inTimeout: Duration = 5.minutes,
+    outTimeout: Duration = 5.minutes,
+    maxConnections = MaxConnections,
+    maxIn = -1,
+    maxOut = -1,
+    maxConnsPerPeer = MaxConnectionsPerPeer,
+    nameResolver: NameResolver = nil,
+    sendSignedPeerRecord = false,
+    peerStoreCapacity = 1000,
+): Switch {.raises: [LPError], public.} =
   ## Helper for common switch configurations.
-
-  if SecureProtocol.Secio in secureManagers:
-      quit("Secio is deprecated!") # use of secio is unsafe
-
-  let addrs = when addrs is MultiAddress: @[addrs] else: addrs
+  let addrs =
+    when addrs is MultiAddress:
+      @[addrs]
+    else:
+      addrs
   var b = SwitchBuilder
     .new()
     .withAddresses(addrs)
@@ -311,13 +349,13 @@ proc newStandardSwitch*(
     .withMaxIn(maxIn)
     .withMaxOut(maxOut)
     .withMaxConnsPerPeer(maxConnsPerPeer)
-    .withPeerStore(capacity=peerStoreCapacity)
+    .withPeerStore(capacity = peerStoreCapacity)
     .withMplex(inTimeout, outTimeout)
     .withTcpTransport(transportFlags)
     .withNameResolver(nameResolver)
     .withNoise()
 
-  if privKey.isSome():
-    b = b.withPrivateKey(privKey.get())
+  privKey.withValue(pkey):
+    b = b.withPrivateKey(pkey)
 
   b.build()

libp2p/cid.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -9,10 +9,7 @@
 
 ## This module implementes CID (Content IDentifier).
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables, hashes
 import multibase, multicodec, multihash, vbuffer, varint
@@ -22,10 +19,16 @@ export results
 
 type
   CidError* {.pure.} = enum
-    Error, Incorrect, Unsupported, Overrun
+    Error
+    Incorrect
+    Unsupported
+    Overrun
 
   CidVersion* = enum
-    CIDvIncorrect, CIDv0, CIDv1, CIDvReserved
+    CIDvIncorrect
+    CIDv0
+    CIDv1
+    CIDvReserved
 
   Cid* = object
     cidver*: CidVersion
@@ -33,54 +36,51 @@ type
     hpos*: int
     data*: VBuffer
 
-const
-  ContentIdsList = [
-    multiCodec("raw"),
-    multiCodec("dag-pb"),
-    multiCodec("dag-cbor"),
-    multiCodec("dag-json"),
-    multiCodec("git-raw"),
-    multiCodec("eth-block"),
-    multiCodec("eth-block-list"),
-    multiCodec("eth-tx-trie"),
-    multiCodec("eth-tx"),
-    multiCodec("eth-tx-receipt-trie"),
-    multiCodec("eth-tx-receipt"),
-    multiCodec("eth-state-trie"),
-    multiCodec("eth-account-snapshot"),
-    multiCodec("eth-storage-trie"),
-    multiCodec("bitcoin-block"),
-    multiCodec("bitcoin-tx"),
-    multiCodec("zcash-block"),
-    multiCodec("zcash-tx"),
-    multiCodec("stellar-block"),
-    multiCodec("stellar-tx"),
-    multiCodec("decred-block"),
-    multiCodec("decred-tx"),
-    multiCodec("dash-block"),
-    multiCodec("dash-tx"),
-    multiCodec("torrent-info"),
-    multiCodec("torrent-file"),
-    multiCodec("ed25519-pub")
-  ]
+const ContentIdsList = [
+  multiCodec("raw"),
+  multiCodec("dag-pb"),
+  multiCodec("dag-cbor"),
+  multiCodec("dag-json"),
+  multiCodec("git-raw"),
+  multiCodec("eth-block"),
+  multiCodec("eth-block-list"),
+  multiCodec("eth-tx-trie"),
+  multiCodec("eth-tx"),
+  multiCodec("eth-tx-receipt-trie"),
+  multiCodec("eth-tx-receipt"),
+  multiCodec("eth-state-trie"),
+  multiCodec("eth-account-snapshot"),
+  multiCodec("eth-storage-trie"),
+  multiCodec("bitcoin-block"),
+  multiCodec("bitcoin-tx"),
+  multiCodec("zcash-block"),
+  multiCodec("zcash-tx"),
+  multiCodec("stellar-block"),
+  multiCodec("stellar-tx"),
+  multiCodec("decred-block"),
+  multiCodec("decred-tx"),
+  multiCodec("dash-block"),
+  multiCodec("dash-tx"),
+  multiCodec("torrent-info"),
+  multiCodec("torrent-file"),
+  multiCodec("ed25519-pub"),
+]
 
 proc initCidCodeTable(): Table[int, MultiCodec] {.compileTime.} =
   for item in ContentIdsList:
     result[int(item)] = item
 
-const
-  CodeContentIds = initCidCodeTable()
+const CodeContentIds = initCidCodeTable()
 
 template orError*(exp: untyped, err: untyped): untyped =
-  (exp.mapErr do (_: auto) -> auto: err)
+  exp.mapErr do(_: auto) -> auto:
+    err
 
 proc decode(data: openArray[byte]): Result[Cid, CidError] =
   if len(data) == 34 and data[0] == 0x12'u8 and data[1] == 0x20'u8:
-    ok(Cid(
-        cidver: CIDv0,
-        mcodec: multiCodec("dag-pb"),
-        hpos: 0,
-        data: initVBuffer(data)))
+    ok(
+      Cid(cidver: CIDv0, mcodec: multiCodec("dag-pb"), hpos: 0, data: initVBuffer(data))
+    )
   else:
     var version, codec: uint64
     var res, offset: int
@@ -101,21 +101,18 @@ proc decode(data: openArray[byte]): Result[Cid, CidError] =
             err(CidError.Incorrect)
           else:
             offset += res
-            var mcodec = CodeContentIds.getOrDefault(cast[int](codec),
-                                                    InvalidMultiCodec)
+            var mcodec =
+              CodeContentIds.getOrDefault(cast[int](codec), InvalidMultiCodec)
             if mcodec == InvalidMultiCodec:
               err(CidError.Incorrect)
             else:
-              if not MultiHash.validate(vb.buffer.toOpenArray(vb.offset,
-                                                              vb.buffer.high)):
+              if not MultiHash.validate(
+                vb.buffer.toOpenArray(vb.offset, vb.buffer.high)
+              ):
                 err(CidError.Incorrect)
               else:
                 vb.finish()
-                ok(Cid(
-                    cidver: CIDv1,
-                    mcodec: mcodec,
-                    hpos: offset,
-                    data: vb))
+                ok(Cid(cidver: CIDv1, mcodec: mcodec, hpos: offset, data: vb))
 
 proc decode(data: openArray[char]): Result[Cid, CidError] =
   var buffer: seq[byte]
@@ -175,7 +172,9 @@ proc mhash*(cid: Cid): Result[MultiHash, CidError] =
   if cid.cidver notin {CIDv0, CIDv1}:
     err(CidError.Incorrect)
   else:
-    MultiHash.init(cid.data.buffer.toOpenArray(cid.hpos, cid.data.high)).orError(CidError.Incorrect)
+    MultiHash.init(cid.data.buffer.toOpenArray(cid.hpos, cid.data.high)).orError(
+      CidError.Incorrect
+    )
 
 proc contentType*(cid: Cid): Result[MultiCodec, CidError] =
   ## Returns content type part of CID
@@ -188,12 +187,15 @@ proc version*(cid: Cid): CidVersion =
   ## Returns CID version
   result = cid.cidver
 
-proc init*[T: char|byte](ctype: typedesc[Cid], data: openArray[T]): Result[Cid, CidError] =
+proc init*[T: char | byte](
+    ctype: typedesc[Cid], data: openArray[T]
+): Result[Cid, CidError] =
   ## Create new content identifier using array of bytes or string ``data``.
   decode(data)
 
-proc init*(ctype: typedesc[Cid], version: CidVersion, content: MultiCodec,
-           hash: MultiHash): Result[Cid, CidError] =
+proc init*(
+    ctype: typedesc[Cid], version: CidVersion, content: MultiCodec, hash: MultiHash
+): Result[Cid, CidError] =
   ## Create new content identifier using content type ``content`` and
   ## MultiHash ``hash`` using version ``version``.
   ##
@@ -216,8 +218,7 @@ proc init*(ctype: typedesc[Cid], version: CidVersion, content: MultiCodec,
     res.data.finish()
     return ok(res)
   elif version == CIDv1:
-    let mcodec = CodeContentIds.getOrDefault(cast[int](content),
-                                             InvalidMultiCodec)
+    let mcodec = CodeContentIds.getOrDefault(cast[int](content), InvalidMultiCodec)
     if mcodec == InvalidMultiCodec:
       return err(CidError.Incorrect)
     res.mcodec = mcodec
@@ -236,11 +237,9 @@ proc `==`*(a: Cid, b: Cid): bool =
   ## are equal, ``false`` otherwise.
   if a.mcodec == b.mcodec:
     var ah, bh: MultiHash
-    if MultiHash.decode(
-      a.data.buffer.toOpenArray(a.hpos, a.data.high), ah).isErr:
+    if MultiHash.decode(a.data.buffer.toOpenArray(a.hpos, a.data.high), ah).isErr:
       return false
-    if MultiHash.decode(
-      b.data.buffer.toOpenArray(b.hpos, b.data.high), bh).isErr:
+    if MultiHash.decode(b.data.buffer.toOpenArray(b.hpos, b.data.high), bh).isErr:
       return false
     result = (ah == bh)
 
@@ -264,12 +263,6 @@ proc write*(vb: var VBuffer, cid: Cid) {.inline.} =
   ## Write CID value ``cid`` to buffer ``vb``.
   vb.writeArray(cid.data.buffer)
 
-proc encode*(mbtype: typedesc[MultiBase], encoding: string,
-             cid: Cid): string {.inline.} =
-  ## Get MultiBase encoded representation of ``cid`` using encoding
-  ## ``encoding``.
-  result = MultiBase.encode(encoding, cid.data.buffer).tryGet()
-
 proc hash*(cid: Cid): Hash {.inline.} =
   hash(cid.data.buffer)
 
@@ -279,9 +272,6 @@ proc `$`*(cid: Cid): string =
     BTCBase58.encode(cid.data.buffer)
   elif cid.cidver == CIDv1:
     let res = MultiBase.encode("base58btc", cid.data.buffer)
-    if res.isOk():
-      res.get()
-    else:
-      ""
+    res.get("")
   else:
     ""

libp2p/connmanager.nim

@@ -7,19 +7,11 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[options, tables, sequtils, sets]
+import std/[tables, sequtils, sets]
 import pkg/[chronos, chronicles, metrics]
-import peerinfo,
-       peerstore,
-       stream/connection,
-       muxers/muxer,
-       utils/semaphore,
-       errors
+import peerinfo, peerstore, stream/connection, muxers/muxer, utils/semaphore, errors
 
 logScope:
   topics = "libp2p connmanager"
@@ -32,14 +24,16 @@ const
 
 type
   TooManyConnectionsError* = object of LPError
+  AlreadyExpectingConnectionError* = object of LPError
 
   ConnEventKind* {.pure.} = enum
-    Connected,    # A connection was made and securely upgraded - there may be
-                  # more than one concurrent connection thus more than one upgrade
-                  # event per peer.
-
-    Disconnected  # Peer disconnected - this event is fired once per upgrade
-                  # when the associated connection is terminated.
+    Connected
+      # A connection was made and securely upgraded - there may be
+      # more than one concurrent connection thus more than one upgrade
+      # event per peer.
+    Disconnected
+      # Peer disconnected - this event is fired once per upgrade
+      # when the associated connection is terminated.
 
   ConnEvent* = object
     case kind*: ConnEventKind
@@ -49,37 +43,31 @@ type
       discard
 
   ConnEventHandler* =
-    proc(peerId: PeerId, event: ConnEvent): Future[void]
-      {.gcsafe, raises: [Defect].}
+    proc(peerId: PeerId, event: ConnEvent): Future[void] {.gcsafe, raises: [].}
 
   PeerEventKind* {.pure.} = enum
-    Left,
-    Identified,
+    Left
     Joined
+    Identified
 
   PeerEvent* = object
     case kind*: PeerEventKind
-      of PeerEventKind.Joined:
-        initiator*: bool
-      else:
-        discard
+    of PeerEventKind.Joined, PeerEventKind.Identified:
+      initiator*: bool
+    else:
+      discard
 
   PeerEventHandler* =
-    proc(peerId: PeerId, event: PeerEvent): Future[void] {.gcsafe, raises: [Defect].}
-
-  MuxerHolder = object
-    muxer: Muxer
-    handle: Future[void]
+    proc(peerId: PeerId, event: PeerEvent): Future[void] {.gcsafe, raises: [].}
 
   ConnManager* = ref object of RootObj
     maxConnsPerPeer: int
     inSema*: AsyncSemaphore
     outSema*: AsyncSemaphore
-    conns: Table[PeerId, HashSet[Connection]]
-    muxed: Table[Connection, MuxerHolder]
+    muxed: Table[PeerId, seq[Muxer]]
     connEvents: array[ConnEventKind, OrderedSet[ConnEventHandler]]
     peerEvents: array[PeerEventKind, OrderedSet[PeerEventHandler]]
-    expectedConnections: Table[PeerId, Future[Connection]]
+    expectedConnectionsOverLimit*: Table[(PeerId, Direction), Future[Muxer]]
     peerStore*: PeerStore
 
   ConnectionSlot* = object
@@ -89,11 +77,13 @@ type
 proc newTooManyConnectionsError(): ref TooManyConnectionsError {.inline.} =
   result = newException(TooManyConnectionsError, "Too many connections")
 
-proc new*(C: type ConnManager,
-           maxConnsPerPeer = MaxConnectionsPerPeer,
-           maxConnections = MaxConnections,
-           maxIn = -1,
-           maxOut = -1): ConnManager =
+proc new*(
+    C: type ConnManager,
+    maxConnsPerPeer = MaxConnectionsPerPeer,
+    maxConnections = MaxConnections,
+    maxIn = -1,
+    maxOut = -1,
+): ConnManager =
   var inSema, outSema: AsyncSemaphore
   if maxIn > 0 or maxOut > 0:
     inSema = newAsyncSemaphore(maxIn)
@@ -104,51 +94,36 @@ proc new*(C: type ConnManager,
   else:
     raiseAssert "Invalid connection counts!"
 
-  C(maxConnsPerPeer: maxConnsPerPeer,
-    inSema: inSema,
-    outSema: outSema)
+  C(maxConnsPerPeer: maxConnsPerPeer, inSema: inSema, outSema: outSema)
 
 proc connCount*(c: ConnManager, peerId: PeerId): int =
-  c.conns.getOrDefault(peerId).len
+  c.muxed.getOrDefault(peerId).len
 
 proc connectedPeers*(c: ConnManager, dir: Direction): seq[PeerId] =
   var peers = newSeq[PeerId]()
-  for peerId, conns in c.conns:
-    if conns.anyIt(it.dir == dir):
+  for peerId, mux in c.muxed:
+    if mux.anyIt(it.connection.dir == dir):
       peers.add(peerId)
   return peers
 
-proc addConnEventHandler*(c: ConnManager,
-                          handler: ConnEventHandler,
-                          kind: ConnEventKind) =
+proc getConnections*(c: ConnManager): Table[PeerId, seq[Muxer]] =
+  return c.muxed
+
+proc addConnEventHandler*(
+    c: ConnManager, handler: ConnEventHandler, kind: ConnEventKind
+) =
   ## Add peer event handler - handlers must not raise exceptions!
   ##
+  if isNil(handler):
+    return
+  c.connEvents[kind].incl(handler)
 
-  try:
-    if isNil(handler): return
-    c.connEvents[kind].incl(handler)
-  except Exception as exc:
-    # TODO: there is an Exception being raised
-    # somewhere in the depths of the std.
-    # Might be related to https://github.com/nim-lang/Nim/issues/17382
+proc removeConnEventHandler*(
+    c: ConnManager, handler: ConnEventHandler, kind: ConnEventKind
+) =
+  c.connEvents[kind].excl(handler)
 
-    raiseAssert exc.msg
-
-proc removeConnEventHandler*(c: ConnManager,
-                             handler: ConnEventHandler,
-                             kind: ConnEventKind) =
-  try:
-    c.connEvents[kind].excl(handler)
-  except Exception as exc:
-    # TODO: there is an Exception being raised
-    # somewhere in the depths of the std.
-    # Might be related to https://github.com/nim-lang/Nim/issues/17382
-
-    raiseAssert exc.msg
-
-proc triggerConnEvent*(c: ConnManager,
-                       peerId: PeerId,
-                       event: ConnEvent) {.async, gcsafe.} =
+proc triggerConnEvent*(c: ConnManager, peerId: PeerId, event: ConnEvent) {.async.} =
   try:
     trace "About to trigger connection events", peer = peerId
     if c.connEvents[event.kind].len() > 0:
@@ -161,54 +136,29 @@ proc triggerConnEvent*(c: ConnManager,
   except CancelledError as exc:
     raise exc
   except CatchableError as exc:
-    warn "Exception in triggerConnEvents",
-      msg = exc.msg, peer = peerId, event = $event
+    warn "Exception in triggerConnEvents", msg = exc.msg, peer = peerId, event = $event
 
-proc addPeerEventHandler*(c: ConnManager,
-                          handler: PeerEventHandler,
-                          kind: PeerEventKind) =
+proc addPeerEventHandler*(
+    c: ConnManager, handler: PeerEventHandler, kind: PeerEventKind
+) =
   ## Add peer event handler - handlers must not raise exceptions!
   ##
 
-  if isNil(handler): return
-  try:
-    c.peerEvents[kind].incl(handler)
-  except Exception as exc:
-    # TODO: there is an Exception being raised
-    # somewhere in the depths of the std.
-    # Might be related to https://github.com/nim-lang/Nim/issues/17382
+  if isNil(handler):
+    return
+  c.peerEvents[kind].incl(handler)
 
-    raiseAssert exc.msg
-
-proc removePeerEventHandler*(c: ConnManager,
-                             handler: PeerEventHandler,
-                             kind: PeerEventKind) =
-  try:
-    c.peerEvents[kind].excl(handler)
-  except Exception as exc:
-    # TODO: there is an Exception being raised
-    # somewhere in the depths of the std.
-    # Might be related to https://github.com/nim-lang/Nim/issues/17382
-
-    raiseAssert exc.msg
-
-proc triggerPeerEvents*(c: ConnManager,
-                        peerId: PeerId,
-                        event: PeerEvent) {.async, gcsafe.} =
+proc removePeerEventHandler*(
+    c: ConnManager, handler: PeerEventHandler, kind: PeerEventKind
+) =
+  c.peerEvents[kind].excl(handler)
 
+proc triggerPeerEvents*(c: ConnManager, peerId: PeerId, event: PeerEvent) {.async.} =
   trace "About to trigger peer events", peer = peerId
   if c.peerEvents[event.kind].len == 0:
     return
 
   try:
-    let count = c.connCount(peerId)
-    if event.kind == PeerEventKind.Joined and count != 1:
-      trace "peer already joined", peer = peerId, event = $event
-      return
-    elif event.kind == PeerEventKind.Left and count != 0:
-      trace "peer still connected or already left", peer = peerId, event = $event
-      return
-
     trace "triggering peer events", peer = peerId, event = $event
 
     var peerEvents: seq[Future[void]]
@@ -221,31 +171,27 @@ proc triggerPeerEvents*(c: ConnManager,
   except CatchableError as exc: # handlers should not raise!
     warn "Exception in triggerPeerEvents", exc = exc.msg, peer = peerId
 
-proc expectConnection*(c: ConnManager, p: PeerId): Future[Connection] {.async.} =
+proc expectConnection*(
+    c: ConnManager, p: PeerId, dir: Direction
+): Future[Muxer] {.async.} =
   ## Wait for a peer to connect to us. This will bypass the `MaxConnectionsPerPeer`
-  if p in c.expectedConnections:
-    raise LPError.newException("Already expecting a connection from that peer")
+  let key = (p, dir)
+  if key in c.expectedConnectionsOverLimit:
+    raise newException(
+      AlreadyExpectingConnectionError,
+      "Already expecting an incoming connection from that peer",
+    )
 
-  let future = newFuture[Connection]()
-  c.expectedConnections[p] = future
+  let future = newFuture[Muxer]()
+  c.expectedConnectionsOverLimit[key] = future
 
   try:
     return await future
   finally:
-    c.expectedConnections.del(p)
-
-proc contains*(c: ConnManager, conn: Connection): bool =
-  ## checks if a connection is being tracked by the
-  ## connection manager
-  ##
-
-  if isNil(conn):
-    return
-
-  return conn in c.conns.getOrDefault(conn.peerId)
+    c.expectedConnectionsOverLimit.del(key)
 
 proc contains*(c: ConnManager, peerId: PeerId): bool =
-  peerId in c.conns
+  peerId in c.muxed
 
 proc contains*(c: ConnManager, muxer: Muxer): bool =
   ## checks if a muxer is being tracked by the connection
@@ -253,203 +199,149 @@ proc contains*(c: ConnManager, muxer: Muxer): bool =
   ##
 
   if isNil(muxer):
-    return
+    return false
 
   let conn = muxer.connection
-  if conn notin c:
-    return
+  return muxer in c.muxed.getOrDefault(conn.peerId)
 
-  if conn notin c.muxed:
-    return
+proc closeMuxer(muxer: Muxer) {.async.} =
+  trace "Cleaning up muxer", m = muxer
 
-  return muxer == c.muxed.getOrDefault(conn).muxer
-
-proc closeMuxerHolder(muxerHolder: MuxerHolder) {.async.} =
-  trace "Cleaning up muxer", m = muxerHolder.muxer
-
-  await muxerHolder.muxer.close()
-  if not(isNil(muxerHolder.handle)):
+  await muxer.close()
+  if not (isNil(muxer.handler)):
     try:
-      await muxerHolder.handle # TODO noraises?
+      await muxer.handler # TODO noraises?
     except CatchableError as exc:
       trace "Exception in close muxer handler", exc = exc.msg
-  trace "Cleaned up muxer", m = muxerHolder.muxer
-
-proc delConn(c: ConnManager, conn: Connection) =
-  let peerId = conn.peerId
-  c.conns.withValue(peerId, peerConns):
-    peerConns[].excl(conn)
-
-    if peerConns[].len == 0:
-      c.conns.del(peerId) # invalidates `peerConns`
-
-    libp2p_peers.set(c.conns.len.int64)
-    trace "Removed connection", conn
-
-proc cleanupConn(c: ConnManager, conn: Connection) {.async.} =
-  ## clean connection's resources such as muxers and streams
-
-  if isNil(conn):
-    trace "Wont cleanup a nil connection"
-    return
-
-  # Remove connection from all tables without async breaks
-  var muxer = some(MuxerHolder())
-  if not c.muxed.pop(conn, muxer.get()):
-    muxer = none(MuxerHolder)
-
-  delConn(c, conn)
+  trace "Cleaned up muxer", m = muxer
 
+proc muxCleanup(c: ConnManager, mux: Muxer) {.async.} =
   try:
-    if muxer.isSome:
-      await closeMuxerHolder(muxer.get())
-  finally:
-    await conn.close()
+    trace "Triggering disconnect events", mux
+    let peerId = mux.connection.peerId
 
-  trace "Connection cleaned up", conn
+    let muxers = c.muxed.getOrDefault(peerId).filterIt(it != mux)
+    if muxers.len > 0:
+      c.muxed[peerId] = muxers
+    else:
+      c.muxed.del(peerId)
+      libp2p_peers.set(c.muxed.len.int64)
+      await c.triggerPeerEvents(peerId, PeerEvent(kind: PeerEventKind.Left))
 
-proc onConnUpgraded(c: ConnManager, conn: Connection) {.async.} =
-  try:
-    trace "Triggering connect events", conn
-    conn.upgrade()
+      if not (c.peerStore.isNil):
+        c.peerStore.cleanup(peerId)
 
-    let peerId = conn.peerId
-    await c.triggerPeerEvents(
-      peerId, PeerEvent(kind: PeerEventKind.Joined, initiator: conn.dir == Direction.Out))
-
-    await c.triggerConnEvent(
-      peerId, ConnEvent(kind: ConnEventKind.Connected, incoming: conn.dir == Direction.In))
+    await c.triggerConnEvent(peerId, ConnEvent(kind: ConnEventKind.Disconnected))
   except CatchableError as exc:
     # This is top-level procedure which will work as separate task, so it
     # do not need to propagate CancelledError and should handle other errors
-    warn "Unexpected exception in switch peer connection cleanup",
-      conn, msg = exc.msg
+    warn "Unexpected exception peer cleanup handler", mux, msg = exc.msg
 
-proc peerCleanup(c: ConnManager, conn: Connection) {.async.} =
-  try:
-    trace "Triggering disconnect events", conn
-    let peerId = conn.peerId
-    await c.triggerConnEvent(
-      peerId, ConnEvent(kind: ConnEventKind.Disconnected))
-    await c.triggerPeerEvents(peerId, PeerEvent(kind: PeerEventKind.Left))
-
-    if not(c.peerStore.isNil):
-      c.peerStore.cleanup(peerId)
-  except CatchableError as exc:
-    # This is top-level procedure which will work as separate task, so it
-    # do not need to propagate CancelledError and should handle other errors
-    warn "Unexpected exception peer cleanup handler",
-      conn, msg = exc.msg
-
-proc onClose(c: ConnManager, conn: Connection) {.async.} =
+proc onClose(c: ConnManager, mux: Muxer) {.async.} =
   ## connection close even handler
   ##
   ## triggers the connections resource cleanup
   ##
   try:
-    await conn.join()
-    trace "Connection closed, cleaning up", conn
-    await c.cleanupConn(conn)
-  except CancelledError:
-    # This is top-level procedure which will work as separate task, so it
-    # do not need to propagate CancelledError.
-    debug "Unexpected cancellation in connection manager's cleanup", conn
+    await mux.connection.join()
+    trace "Connection closed, cleaning up", mux
   except CatchableError as exc:
-    debug "Unexpected exception in connection manager's cleanup",
-          errMsg = exc.msg, conn
+    debug "Unexpected exception in connection manager's cleanup", errMsg = exc.msg, mux
   finally:
-    trace "Triggering peerCleanup", conn
-    asyncSpawn c.peerCleanup(conn)
+    await c.muxCleanup(mux)
 
-proc selectConn*(c: ConnManager,
-                peerId: PeerId,
-                dir: Direction): Connection =
+proc selectMuxer*(c: ConnManager, peerId: PeerId, dir: Direction): Muxer =
   ## Select a connection for the provided peer and direction
   ##
-  let conns = toSeq(
-    c.conns.getOrDefault(peerId))
-    .filterIt( it.dir == dir )
+  let conns = toSeq(c.muxed.getOrDefault(peerId)).filterIt(it.connection.dir == dir)
 
   if conns.len > 0:
     return conns[0]
 
-proc selectConn*(c: ConnManager, peerId: PeerId): Connection =
+proc selectMuxer*(c: ConnManager, peerId: PeerId): Muxer =
   ## Select a connection for the provided giving priority
   ## to outgoing connections
   ##
 
-  var conn = c.selectConn(peerId, Direction.Out)
-  if isNil(conn):
-    conn = c.selectConn(peerId, Direction.In)
-  if isNil(conn):
+  var mux = c.selectMuxer(peerId, Direction.Out)
+  if isNil(mux):
+    mux = c.selectMuxer(peerId, Direction.In)
+  if isNil(mux):
     trace "connection not found", peerId
+  return mux
 
-  return conn
-
-proc selectMuxer*(c: ConnManager, conn: Connection): Muxer =
-  ## select the muxer for the provided connection
+proc storeMuxer*(c: ConnManager, muxer: Muxer) {.raises: [CatchableError].} =
+  ## store the connection and muxer
   ##
 
-  if isNil(conn):
-    return
+  if isNil(muxer):
+    raise newException(LPError, "muxer cannot be nil")
 
-  if conn in c.muxed:
-    return c.muxed.getOrDefault(conn).muxer
-  else:
-    debug "no muxer for connection", conn
+  if isNil(muxer.connection):
+    raise newException(LPError, "muxer's connection cannot be nil")
 
-proc storeConn*(c: ConnManager, conn: Connection)
-  {.raises: [Defect, LPError].} =
-  ## store a connection
-  ##
-
-  if isNil(conn):
-    raise newException(LPError, "Connection cannot be nil")
-
-  if conn.closed or conn.atEof:
+  if muxer.connection.closed or muxer.connection.atEof:
     raise newException(LPError, "Connection closed or EOF")
 
-  let peerId = conn.peerId
+  let
+    peerId = muxer.connection.peerId
+    dir = muxer.connection.dir
 
   # we use getOrDefault in the if below instead of [] to avoid the KeyError
-  if peerId in c.expectedConnections and
-     not(c.expectedConnections.getOrDefault(peerId).finished):
-      c.expectedConnections.getOrDefault(peerId).complete(conn)
-  elif c.conns.getOrDefault(peerId).len > c.maxConnsPerPeer:
-    debug "Too many connections for peer",
-      conn, conns = c.conns.getOrDefault(peerId).len
+  if c.muxed.getOrDefault(peerId).len > c.maxConnsPerPeer:
+    let key = (peerId, dir)
+    let expectedConn = c.expectedConnectionsOverLimit.getOrDefault(key)
+    if expectedConn != nil and not expectedConn.finished:
+      expectedConn.complete(muxer)
+    else:
+      debug "Too many connections for peer", conns = c.muxed.getOrDefault(peerId).len
 
-    raise newTooManyConnectionsError()
+      raise newTooManyConnectionsError()
 
-  c.conns.mgetOrPut(peerId, HashSet[Connection]()).incl(conn)
-  libp2p_peers.set(c.conns.len.int64)
+  var newPeer = false
+  c.muxed.withValue(peerId, muxers):
+    doAssert muxers[].len > 0
+    doAssert muxer notin muxers[]
+    muxers[].add(muxer)
+  do:
+    c.muxed[peerId] = @[muxer]
+    newPeer = true
+  libp2p_peers.set(c.muxed.len.int64)
 
-  # Launch on close listener
-  # All the errors are handled inside `onClose()` procedure.
-  asyncSpawn c.onClose(conn)
+  asyncSpawn c.triggerConnEvent(
+    peerId, ConnEvent(kind: ConnEventKind.Connected, incoming: dir == Direction.In)
+  )
 
-  trace "Stored connection",
-    conn, direction = $conn.dir, connections = c.conns.len
+  if newPeer:
+    asyncSpawn c.triggerPeerEvents(
+      peerId, PeerEvent(kind: PeerEventKind.Joined, initiator: dir == Direction.Out)
+    )
+
+  asyncSpawn c.onClose(muxer)
+
+  trace "Stored muxer", muxer, direction = $muxer.connection.dir, peers = c.muxed.len
 
 proc getIncomingSlot*(c: ConnManager): Future[ConnectionSlot] {.async.} =
   await c.inSema.acquire()
   return ConnectionSlot(connManager: c, direction: In)
 
-proc getOutgoingSlot*(c: ConnManager, forceDial = false): ConnectionSlot {.raises: [Defect, TooManyConnectionsError].} =
+proc getOutgoingSlot*(
+    c: ConnManager, forceDial = false
+): ConnectionSlot {.raises: [TooManyConnectionsError].} =
   if forceDial:
     c.outSema.forceAcquire()
   elif not c.outSema.tryAcquire():
-    trace "Too many outgoing connections!", count = c.outSema.count,
-                                            max = c.outSema.size
+    trace "Too many outgoing connections!",
+      available = c.outSema.count, max = c.outSema.size
     raise newTooManyConnectionsError()
   return ConnectionSlot(connManager: c, direction: Out)
 
 proc slotsAvailable*(c: ConnManager, dir: Direction): int =
-  case dir:
-    of Direction.In:
-      return c.inSema.count
-    of Direction.Out:
-      return c.outSema.count
+  case dir
+  of Direction.In:
+    return c.inSema.count
+  of Direction.Out:
+    return c.outSema.count
 
 proc release*(cs: ConnectionSlot) =
   if cs.direction == In:
@@ -472,81 +364,41 @@ proc trackConnection*(cs: ConnectionSlot, conn: Connection) =
 
   asyncSpawn semaphoreMonitor()
 
-proc storeMuxer*(c: ConnManager,
-                 muxer: Muxer,
-                 handle: Future[void] = nil)
-                 {.raises: [Defect, CatchableError].} =
-  ## store the connection and muxer
+proc trackMuxer*(cs: ConnectionSlot, mux: Muxer) =
+  if isNil(mux):
+    cs.release()
+    return
+  cs.trackConnection(mux.connection)
+
+proc getStream*(c: ConnManager, muxer: Muxer): Future[Connection] {.async.} =
+  ## get a muxed stream for the passed muxer
   ##
 
-  if isNil(muxer):
-    raise newException(CatchableError, "muxer cannot be nil")
-
-  if isNil(muxer.connection):
-    raise newException(CatchableError, "muxer's connection cannot be nil")
-
-  if muxer.connection notin c:
-    raise newException(CatchableError, "cant add muxer for untracked connection")
-
-  c.muxed[muxer.connection] = MuxerHolder(
-    muxer: muxer,
-    handle: handle)
-
-  trace "Stored muxer",
-    muxer, handle = not handle.isNil, connections = c.conns.len
-
-  asyncSpawn c.onConnUpgraded(muxer.connection)
-
-proc getStream*(c: ConnManager,
-                peerId: PeerId,
-                dir: Direction): Future[Connection] {.async, gcsafe.} =
-  ## get a muxed stream for the provided peer
-  ## with the given direction
-  ##
-
-  let muxer = c.selectMuxer(c.selectConn(peerId, dir))
-  if not(isNil(muxer)):
+  if not (isNil(muxer)):
     return await muxer.newStream()
 
-proc getStream*(c: ConnManager,
-                peerId: PeerId): Future[Connection] {.async, gcsafe.} =
+proc getStream*(c: ConnManager, peerId: PeerId): Future[Connection] {.async.} =
   ## get a muxed stream for the passed peer from any connection
   ##
 
-  let muxer = c.selectMuxer(c.selectConn(peerId))
-  if not(isNil(muxer)):
-    return await muxer.newStream()
+  return await c.getStream(c.selectMuxer(peerId))
 
-proc getStream*(c: ConnManager,
-                conn: Connection): Future[Connection] {.async, gcsafe.} =
-  ## get a muxed stream for the passed connection
+proc getStream*(
+    c: ConnManager, peerId: PeerId, dir: Direction
+): Future[Connection] {.async.} =
+  ## get a muxed stream for the passed peer from a connection with `dir`
   ##
 
-  let muxer = c.selectMuxer(conn)
-  if not(isNil(muxer)):
-    return await muxer.newStream()
+  return await c.getStream(c.selectMuxer(peerId, dir))
 
 proc dropPeer*(c: ConnManager, peerId: PeerId) {.async.} =
   ## drop connections and cleanup resources for peer
   ##
   trace "Dropping peer", peerId
-  let conns = c.conns.getOrDefault(peerId)
-  for conn in conns:
-    trace  "Removing connection", conn
-    delConn(c, conn)
-
-  var muxers: seq[MuxerHolder]
-  for conn in conns:
-    if conn in c.muxed:
-      muxers.add c.muxed[conn]
-      c.muxed.del(conn)
+  let muxers = c.muxed.getOrDefault(peerId)
 
   for muxer in muxers:
-    await closeMuxerHolder(muxer)
-
-  for conn in conns:
-    await conn.close()
-    trace "Dropped peer", peerId
+    await closeMuxer(muxer)
 
   trace "Peer dropped", peerId
 
@@ -556,24 +408,17 @@ proc close*(c: ConnManager) {.async.} =
   ##
 
   trace "Closing ConnManager"
-  let conns = c.conns
-  c.conns.clear()
-
   let muxed = c.muxed
   c.muxed.clear()
 
-  let expected = c.expectedConnections
-  c.expectedConnections.clear()
+  let expected = c.expectedConnectionsOverLimit
+  c.expectedConnectionsOverLimit.clear()
 
   for _, fut in expected:
     await fut.cancelAndWait()
 
-  for _, muxer in muxed:
-    await closeMuxerHolder(muxer)
-
-  for _, conns2 in conns:
-    for conn in conns2:
-      await conn.close()
+  for _, muxers in muxed:
+    for mux in muxers:
+      await closeMuxer(mux)
 
   trace "Closed ConnManager"
-

libp2p/crypto/chacha20poly1305.nim

@@ -15,14 +15,11 @@
 
 # RFC @ https://tools.ietf.org/html/rfc7539
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import bearssl/blockx
 from stew/assign2 import assign
-from stew/ranges/ptr_arith import baseAddr
+from stew/ptrops import baseAddr
 
 const
   ChaChaPolyKeySize = 32
@@ -51,17 +48,19 @@ proc intoChaChaPolyTag*(s: openArray[byte]): ChaChaPolyTag =
 # this is reconciled at runtime
 # we do this in the global scope / module init
 
-proc encrypt*(_: type[ChaChaPoly],
-                 key: ChaChaPolyKey,
-                 nonce: ChaChaPolyNonce,
-                 tag: var ChaChaPolyTag,
-                 data: var openArray[byte],
-                 aad: openArray[byte]) =
-  let
-    ad = if aad.len > 0:
-           unsafeAddr aad[0]
-         else:
-           nil
+proc encrypt*(
+    _: type[ChaChaPoly],
+    key: ChaChaPolyKey,
+    nonce: ChaChaPolyNonce,
+    tag: var ChaChaPolyTag,
+    data: var openArray[byte],
+    aad: openArray[byte],
+) =
+  let ad =
+    if aad.len > 0:
+      unsafeAddr aad[0]
+    else:
+      nil
 
   poly1305CtmulRun(
     unsafeAddr key[0],
@@ -72,20 +71,23 @@ proc encrypt*(_: type[ChaChaPoly],
     uint(aad.len),
     baseAddr(tag),
     # cast is required to workaround https://github.com/nim-lang/Nim/issues/13905
-    cast[Chacha20Run](chacha20CtRun),
-    #[encrypt]# 1.cint)
+    cast[Chacha20Run](chacha20CtRun), #[encrypt]#
+    1.cint,
+  )
 
-proc decrypt*(_: type[ChaChaPoly],
-                 key: ChaChaPolyKey,
-                 nonce: ChaChaPolyNonce,
-                 tag: var ChaChaPolyTag,
-                 data: var openArray[byte],
-                 aad: openArray[byte]) =
-  let
-    ad = if aad.len > 0:
-          unsafeAddr aad[0]
-         else:
-           nil
+proc decrypt*(
+    _: type[ChaChaPoly],
+    key: ChaChaPolyKey,
+    nonce: ChaChaPolyNonce,
+    tag: var ChaChaPolyTag,
+    data: var openArray[byte],
+    aad: openArray[byte],
+) =
+  let ad =
+    if aad.len > 0:
+      unsafeAddr aad[0]
+    else:
+      nil
 
   poly1305CtmulRun(
     unsafeAddr key[0],
@@ -96,5 +98,6 @@ proc decrypt*(_: type[ChaChaPoly],
     uint(aad.len),
     baseAddr(tag),
     # cast is required to workaround https://github.com/nim-lang/Nim/issues/13905
-    cast[Chacha20Run](chacha20CtRun),
-    #[decrypt]# 0.cint)
+    cast[Chacha20Run](chacha20CtRun), #[decrypt]#
+    0.cint,
+  )

libp2p/crypto/crypto.nim

@@ -8,21 +8,17 @@
 # those terms.
 
 ## This module implements Public Key and Private Key interface for libp2p.
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 from strutils import split, strip, cmpIgnoreCase
 
 const libp2p_pki_schemes* {.strdefine.} = "rsa,ed25519,secp256k1,ecnist"
 
-type
-  PKScheme* = enum
-    RSA = 0,
-    Ed25519,
-    Secp256k1,
-    ECDSA
+type PKScheme* = enum
+  RSA = 0
+  Ed25519
+  Secp256k1
+  ECDSA
 
 proc initSupportedSchemes(list: static string): set[PKScheme] =
   var res: set[PKScheme]
@@ -68,11 +64,13 @@ when supported(PKScheme.Ed25519):
   import ed25519/ed25519
 when supported(PKScheme.Secp256k1):
   import secp
+when supported(PKScheme.ECDSA):
+  import ecnist
 
-# We are still importing `ecnist` because, it is used for SECIO handshake,
-# but it will be impossible to create ECNIST keys or import ECNIST keys.
+  # These used to be declared in `crypto` itself
+  export ecnist.ephemeral, ecnist.ECDHEScheme
 
-import ecnist, bearssl/rand, bearssl/hash as bhash
+import bearssl/rand, bearssl/hash as bhash
 import ../protobuf/minprotobuf, ../vbuffer, ../multihash, ../multicodec
 import nimcrypto/[rijndael, twofish, sha2, hash, hmac]
 # We use `ncrutils` for constant-time hexadecimal encoding/decoding procedures.
@@ -86,11 +84,9 @@ export rijndael, twofish, sha2, hash, hmac, ncrutils, rand
 
 type
   DigestSheme* = enum
-    Sha256,
+    Sha256
     Sha512
 
-  ECDHEScheme* = EcCurveKind
-
   PublicKey* = object
     case scheme*: PKScheme
     of PKScheme.RSA:
@@ -151,15 +147,16 @@ type
     data*: seq[byte]
 
   CryptoError* = enum
-    KeyError,
-    SigError,
-    HashError,
+    KeyError
+    SigError
+    HashError
     SchemeError
 
   CryptoResult*[T] = Result[T, CryptoError]
 
 template orError*(exp: untyped, err: untyped): untyped =
-  (exp.mapErr do (_: auto) -> auto: err)
+  exp.mapErr do(_: auto) -> auto:
+    err
 
 proc newRng*(): ref HmacDrbgContext =
   # You should only create one instance of the RNG per application / library
@@ -175,11 +172,9 @@ proc newRng*(): ref HmacDrbgContext =
     return nil
   rng
 
-proc shuffle*[T](
-  rng: ref HmacDrbgContext,
-  x: var openArray[T]) =
-
-  if x.len == 0: return
+proc shuffle*[T](rng: ref HmacDrbgContext, x: var openArray[T]) =
+  if x.len == 0:
+    return
 
   var randValues = newSeqUninitialized[byte](len(x) * 2)
   hmacDrbgGenerate(rng[], randValues)
@@ -190,9 +185,12 @@ proc shuffle*[T](
       y = rand mod i
     swap(x[i], x[y])
 
-proc random*(T: typedesc[PrivateKey], scheme: PKScheme,
-             rng: var HmacDrbgContext,
-             bits = RsaDefaultKeySize): CryptoResult[PrivateKey] =
+proc random*(
+    T: typedesc[PrivateKey],
+    scheme: PKScheme,
+    rng: var HmacDrbgContext,
+    bits = RsaDefaultKeySize,
+): CryptoResult[PrivateKey] =
   ## Generate random private key for scheme ``scheme``.
   ##
   ## ``bits`` is number of bits for RSA key, ``bits`` value must be in
@@ -200,7 +198,7 @@ proc random*(T: typedesc[PrivateKey], scheme: PKScheme,
   case scheme
   of PKScheme.RSA:
     when supported(PKScheme.RSA):
-      let rsakey = ? RsaPrivateKey.random(rng, bits).orError(KeyError)
+      let rsakey = ?RsaPrivateKey.random(rng, bits).orError(KeyError)
       ok(PrivateKey(scheme: scheme, rsakey: rsakey))
     else:
       err(SchemeError)
@@ -212,7 +210,7 @@ proc random*(T: typedesc[PrivateKey], scheme: PKScheme,
       err(SchemeError)
   of PKScheme.ECDSA:
     when supported(PKScheme.ECDSA):
-      let eckey = ? ecnist.EcPrivateKey.random(Secp256r1, rng).orError(KeyError)
+      let eckey = ?ecnist.EcPrivateKey.random(Secp256r1, rng).orError(KeyError)
       ok(PrivateKey(scheme: scheme, eckey: eckey))
     else:
       err(SchemeError)
@@ -223,8 +221,9 @@ proc random*(T: typedesc[PrivateKey], scheme: PKScheme,
     else:
       err(SchemeError)
 
-proc random*(T: typedesc[PrivateKey], rng: var HmacDrbgContext,
-             bits = RsaDefaultKeySize): CryptoResult[PrivateKey] =
+proc random*(
+    T: typedesc[PrivateKey], rng: var HmacDrbgContext, bits = RsaDefaultKeySize
+): CryptoResult[PrivateKey] =
   ## Generate random private key using default public-key cryptography scheme.
   ##
   ## Default public-key cryptography schemes are following order:
@@ -238,17 +237,20 @@ proc random*(T: typedesc[PrivateKey], rng: var HmacDrbgContext,
     let skkey = SkPrivateKey.random(rng)
     ok(PrivateKey(scheme: PKScheme.Secp256k1, skkey: skkey))
   elif supported(PKScheme.RSA):
-    let rsakey = ? RsaPrivateKey.random(rng, bits).orError(KeyError)
+    let rsakey = ?RsaPrivateKey.random(rng, bits).orError(KeyError)
     ok(PrivateKey(scheme: PKScheme.RSA, rsakey: rsakey))
   elif supported(PKScheme.ECDSA):
-    let eckey = ? ecnist.EcPrivateKey.random(Secp256r1, rng).orError(KeyError)
+    let eckey = ?ecnist.EcPrivateKey.random(Secp256r1, rng).orError(KeyError)
     ok(PrivateKey(scheme: PKScheme.ECDSA, eckey: eckey))
   else:
     err(SchemeError)
 
-proc random*(T: typedesc[KeyPair], scheme: PKScheme,
-             rng: var HmacDrbgContext,
-             bits = RsaDefaultKeySize): CryptoResult[KeyPair] =
+proc random*(
+    T: typedesc[KeyPair],
+    scheme: PKScheme,
+    rng: var HmacDrbgContext,
+    bits = RsaDefaultKeySize,
+): CryptoResult[KeyPair] =
   ## Generate random key pair for scheme ``scheme``.
   ##
   ## ``bits`` is number of bits for RSA key, ``bits`` value must be in
@@ -256,39 +258,52 @@ proc random*(T: typedesc[KeyPair], scheme: PKScheme,
   case scheme
   of PKScheme.RSA:
     when supported(PKScheme.RSA):
-      let pair = ? RsaKeyPair.random(rng, bits).orError(KeyError)
-      ok(KeyPair(
-        seckey: PrivateKey(scheme: scheme, rsakey: pair.seckey),
-        pubkey: PublicKey(scheme: scheme, rsakey: pair.pubkey)))
+      let pair = ?RsaKeyPair.random(rng, bits).orError(KeyError)
+      ok(
+        KeyPair(
+          seckey: PrivateKey(scheme: scheme, rsakey: pair.seckey),
+          pubkey: PublicKey(scheme: scheme, rsakey: pair.pubkey),
+        )
+      )
     else:
       err(SchemeError)
   of PKScheme.Ed25519:
     when supported(PKScheme.Ed25519):
       let pair = EdKeyPair.random(rng)
-      ok(KeyPair(
-        seckey: PrivateKey(scheme: scheme, edkey: pair.seckey),
-        pubkey: PublicKey(scheme: scheme, edkey: pair.pubkey)))
+      ok(
+        KeyPair(
+          seckey: PrivateKey(scheme: scheme, edkey: pair.seckey),
+          pubkey: PublicKey(scheme: scheme, edkey: pair.pubkey),
+        )
+      )
     else:
       err(SchemeError)
   of PKScheme.ECDSA:
     when supported(PKScheme.ECDSA):
-      let pair = ? EcKeyPair.random(Secp256r1, rng).orError(KeyError)
-      ok(KeyPair(
-        seckey: PrivateKey(scheme: scheme, eckey: pair.seckey),
-        pubkey: PublicKey(scheme: scheme, eckey: pair.pubkey)))
+      let pair = ?EcKeyPair.random(Secp256r1, rng).orError(KeyError)
+      ok(
+        KeyPair(
+          seckey: PrivateKey(scheme: scheme, eckey: pair.seckey),
+          pubkey: PublicKey(scheme: scheme, eckey: pair.pubkey),
+        )
+      )
     else:
       err(SchemeError)
   of PKScheme.Secp256k1:
     when supported(PKScheme.Secp256k1):
       let pair = SkKeyPair.random(rng)
-      ok(KeyPair(
-        seckey: PrivateKey(scheme: scheme, skkey: pair.seckey),
-        pubkey: PublicKey(scheme: scheme, skkey: pair.pubkey)))
+      ok(
+        KeyPair(
+          seckey: PrivateKey(scheme: scheme, skkey: pair.seckey),
+          pubkey: PublicKey(scheme: scheme, skkey: pair.pubkey),
+        )
+      )
     else:
       err(SchemeError)
 
-proc random*(T: typedesc[KeyPair], rng: var HmacDrbgContext,
-             bits = RsaDefaultKeySize): CryptoResult[KeyPair] =
+proc random*(
+    T: typedesc[KeyPair], rng: var HmacDrbgContext, bits = RsaDefaultKeySize
+): CryptoResult[KeyPair] =
   ## Generate random private pair of keys using default public-key cryptography
   ## scheme.
   ##
@@ -298,24 +313,36 @@ proc random*(T: typedesc[KeyPair], rng: var HmacDrbgContext,
   ## So will be used first available (supported) method.
   when supported(PKScheme.Ed25519):
     let pair = EdKeyPair.random(rng)
-    ok(KeyPair(
-      seckey: PrivateKey(scheme: PKScheme.Ed25519, edkey: pair.seckey),
-      pubkey: PublicKey(scheme: PKScheme.Ed25519, edkey: pair.pubkey)))
+    ok(
+      KeyPair(
+        seckey: PrivateKey(scheme: PKScheme.Ed25519, edkey: pair.seckey),
+        pubkey: PublicKey(scheme: PKScheme.Ed25519, edkey: pair.pubkey),
+      )
+    )
   elif supported(PKScheme.Secp256k1):
     let pair = SkKeyPair.random(rng)
-    ok(KeyPair(
-      seckey: PrivateKey(scheme: PKScheme.Secp256k1, skkey: pair.seckey),
-      pubkey: PublicKey(scheme: PKScheme.Secp256k1, skkey: pair.pubkey)))
+    ok(
+      KeyPair(
+        seckey: PrivateKey(scheme: PKScheme.Secp256k1, skkey: pair.seckey),
+        pubkey: PublicKey(scheme: PKScheme.Secp256k1, skkey: pair.pubkey),
+      )
+    )
   elif supported(PKScheme.RSA):
-    let pair = ? RsaKeyPair.random(rng, bits).orError(KeyError)
-    ok(KeyPair(
-      seckey: PrivateKey(scheme: PKScheme.RSA, rsakey: pair.seckey),
-      pubkey: PublicKey(scheme: PKScheme.RSA, rsakey: pair.pubkey)))
+    let pair = ?RsaKeyPair.random(rng, bits).orError(KeyError)
+    ok(
+      KeyPair(
+        seckey: PrivateKey(scheme: PKScheme.RSA, rsakey: pair.seckey),
+        pubkey: PublicKey(scheme: PKScheme.RSA, rsakey: pair.pubkey),
+      )
+    )
   elif supported(PKScheme.ECDSA):
-    let pair = ? EcKeyPair.random(Secp256r1, rng).orError(KeyError)
-    ok(KeyPair(
-      seckey: PrivateKey(scheme: PKScheme.ECDSA, eckey: pair.seckey),
-      pubkey: PublicKey(scheme: PKScheme.ECDSA, eckey: pair.pubkey)))
+    let pair = ?EcKeyPair.random(Secp256r1, rng).orError(KeyError)
+    ok(
+      KeyPair(
+        seckey: PrivateKey(scheme: PKScheme.ECDSA, eckey: pair.seckey),
+        pubkey: PublicKey(scheme: PKScheme.ECDSA, eckey: pair.pubkey),
+      )
+    )
   else:
     err(SchemeError)
 
@@ -336,7 +363,7 @@ proc getPublicKey*(key: PrivateKey): CryptoResult[PublicKey] =
       err(SchemeError)
   of PKScheme.ECDSA:
     when supported(PKScheme.ECDSA):
-      let eckey = ? key.eckey.getPublicKey().orError(KeyError)
+      let eckey = ?key.eckey.getPublicKey().orError(KeyError)
       ok(PublicKey(scheme: ECDSA, eckey: eckey))
     else:
       err(SchemeError)
@@ -347,8 +374,9 @@ proc getPublicKey*(key: PrivateKey): CryptoResult[PublicKey] =
     else:
       err(SchemeError)
 
-proc toRawBytes*(key: PrivateKey | PublicKey,
-                 data: var openArray[byte]): CryptoResult[int] =
+proc toRawBytes*(
+    key: PrivateKey | PublicKey, data: var openArray[byte]
+): CryptoResult[int] =
   ## Serialize private key ``key`` (using scheme's own serialization) and store
   ## it to ``data``.
   ##
@@ -407,7 +435,7 @@ proc toBytes*(key: PrivateKey, data: var openArray[byte]): CryptoResult[int] =
   ## Returns number of bytes (octets) needed to store private key ``key``.
   var msg = initProtoBuffer()
   msg.write(1, uint64(key.scheme))
-  msg.write(2, ? key.getRawBytes())
+  msg.write(2, ?key.getRawBytes())
   msg.finish()
   var blen = len(msg.buffer)
   if len(data) >= blen:
@@ -421,7 +449,7 @@ proc toBytes*(key: PublicKey, data: var openArray[byte]): CryptoResult[int] =
   ## Returns number of bytes (octets) needed to store public key ``key``.
   var msg = initProtoBuffer()
   msg.write(1, uint64(key.scheme))
-  msg.write(2, ? key.getRawBytes())
+  msg.write(2, ?key.getRawBytes())
   msg.finish()
   var blen = len(msg.buffer)
   if len(data) >= blen and blen > 0:
@@ -441,7 +469,7 @@ proc getBytes*(key: PrivateKey): CryptoResult[seq[byte]] =
   ## serialization).
   var msg = initProtoBuffer()
   msg.write(1, uint64(key.scheme))
-  msg.write(2, ? key.getRawBytes())
+  msg.write(2, ?key.getRawBytes())
   msg.finish()
   ok(msg.buffer)
 
@@ -450,7 +478,7 @@ proc getBytes*(key: PublicKey): CryptoResult[seq[byte]] =
   ## serialization).
   var msg = initProtoBuffer()
   msg.write(1, uint64(key.scheme))
-  msg.write(2, ? key.getRawBytes())
+  msg.write(2, ?key.getRawBytes())
   msg.finish()
   ok(msg.buffer)
 
@@ -458,7 +486,7 @@ proc getBytes*(sig: Signature): seq[byte] =
   ## Return signature ``sig`` in binary form.
   result = sig.data
 
-proc init*[T: PrivateKey|PublicKey](key: var T, data: openArray[byte]): bool =
+template initImpl[T: PrivateKey | PublicKey](key: var T, data: openArray[byte]): bool =
   ## Initialize private key ``key`` from libp2p's protobuf serialized raw
   ## binary form.
   ##
@@ -471,7 +499,7 @@ proc init*[T: PrivateKey|PublicKey](key: var T, data: openArray[byte]): bool =
     var pb = initProtoBuffer(@data)
     let r1 = pb.getField(1, id)
     let r2 = pb.getField(2, buffer)
-    if not(r1.isOk() and r1.get() and r2.isOk() and r2.get()):
+    if not (r1.get(false) and r2.get(false)):
       false
     else:
       if cast[int8](id) notin SupportedSchemesInt or len(buffer) <= 0:
@@ -482,7 +510,7 @@ proc init*[T: PrivateKey|PublicKey](key: var T, data: openArray[byte]): bool =
           var nkey = PrivateKey(scheme: scheme)
         else:
           var nkey = PublicKey(scheme: scheme)
-        case scheme:
+        case scheme
         of PKScheme.RSA:
           when supported(PKScheme.RSA):
             if init(nkey.rsakey, buffer).isOk:
@@ -520,6 +548,15 @@ proc init*[T: PrivateKey|PublicKey](key: var T, data: openArray[byte]): bool =
           else:
             false
 
+{.push warning[ProveField]: off.} # https://github.com/nim-lang/Nim/issues/22060
+proc init*(key: var PrivateKey, data: openArray[byte]): bool =
+  initImpl(key, data)
+
+proc init*(key: var PublicKey, data: openArray[byte]): bool =
+  initImpl(key, data)
+
+{.pop.}
+
 proc init*(sig: var Signature, data: openArray[byte]): bool =
   ## Initialize signature ``sig`` from raw binary form.
   ##
@@ -528,7 +565,7 @@ proc init*(sig: var Signature, data: openArray[byte]): bool =
     sig.data = @data
     result = true
 
-proc init*[T: PrivateKey|PublicKey](key: var T, data: string): bool =
+proc init*[T: PrivateKey | PublicKey](key: var T, data: string): bool =
   ## Initialize private/public key ``key`` from libp2p's protobuf serialized
   ## hexadecimal string representation.
   ##
@@ -542,8 +579,7 @@ proc init*(sig: var Signature, data: string): bool =
   ## Returns ``true`` on success.
   sig.init(ncrutils.fromHex(data))
 
-proc init*(t: typedesc[PrivateKey],
-           data: openArray[byte]): CryptoResult[PrivateKey] =
+proc init*(t: typedesc[PrivateKey], data: openArray[byte]): CryptoResult[PrivateKey] =
   ## Create new private key from libp2p's protobuf serialized binary form.
   var res: t
   if not res.init(data):
@@ -551,8 +587,7 @@ proc init*(t: typedesc[PrivateKey],
   else:
     ok(res)
 
-proc init*(t: typedesc[PublicKey],
-           data: openArray[byte]): CryptoResult[PublicKey] =
+proc init*(t: typedesc[PublicKey], data: openArray[byte]): CryptoResult[PublicKey] =
   ## Create new public key from libp2p's protobuf serialized binary form.
   var res: t
   if not res.init(data):
@@ -560,8 +595,7 @@ proc init*(t: typedesc[PublicKey],
   else:
     ok(res)
 
-proc init*(t: typedesc[Signature],
-           data: openArray[byte]): CryptoResult[Signature] =
+proc init*(t: typedesc[Signature], data: openArray[byte]): CryptoResult[Signature] =
   ## Create new public key from libp2p's protobuf serialized binary form.
   var res: t
   if not res.init(data):
@@ -577,24 +611,28 @@ proc init*(t: typedesc[PrivateKey], data: string): CryptoResult[PrivateKey] =
 when supported(PKScheme.RSA):
   proc init*(t: typedesc[PrivateKey], key: rsa.RsaPrivateKey): PrivateKey =
     PrivateKey(scheme: RSA, rsakey: key)
+
   proc init*(t: typedesc[PublicKey], key: rsa.RsaPublicKey): PublicKey =
     PublicKey(scheme: RSA, rsakey: key)
 
 when supported(PKScheme.Ed25519):
   proc init*(t: typedesc[PrivateKey], key: EdPrivateKey): PrivateKey =
     PrivateKey(scheme: Ed25519, edkey: key)
+
   proc init*(t: typedesc[PublicKey], key: EdPublicKey): PublicKey =
     PublicKey(scheme: Ed25519, edkey: key)
 
 when supported(PKScheme.Secp256k1):
   proc init*(t: typedesc[PrivateKey], key: SkPrivateKey): PrivateKey =
     PrivateKey(scheme: Secp256k1, skkey: key)
+
   proc init*(t: typedesc[PublicKey], key: SkPublicKey): PublicKey =
     PublicKey(scheme: Secp256k1, skkey: key)
 
 when supported(PKScheme.ECDSA):
   proc init*(t: typedesc[PrivateKey], key: ecnist.EcPrivateKey): PrivateKey =
     PrivateKey(scheme: ECDSA, eckey: key)
+
   proc init*(t: typedesc[PublicKey], key: ecnist.EcPublicKey): PublicKey =
     PublicKey(scheme: ECDSA, eckey: key)
 
@@ -663,9 +701,9 @@ proc `==`*(key1, key2: PrivateKey): bool =
   else:
     false
 
-proc `$`*(key: PrivateKey|PublicKey): string =
+proc `$`*(key: PrivateKey | PublicKey): string =
   ## Get string representation of private/public key ``key``.
-  case key.scheme:
+  case key.scheme
   of PKScheme.RSA:
     when supported(PKScheme.RSA):
       $(key.rsakey)
@@ -687,9 +725,9 @@ proc `$`*(key: PrivateKey|PublicKey): string =
     else:
       "unsupported secp256k1 key"
 
-func shortLog*(key: PrivateKey|PublicKey): string =
+func shortLog*(key: PrivateKey | PublicKey): string =
   ## Get short string representation of private/public key ``key``.
-  case key.scheme:
+  case key.scheme
   of PKScheme.RSA:
     when supported(PKScheme.RSA):
       ($key.rsakey).shortLog
@@ -715,16 +753,15 @@ proc `$`*(sig: Signature): string =
   ## Get string representation of signature ``sig``.
   result = ncrutils.toHex(sig.data)
 
-proc sign*(key: PrivateKey,
-           data: openArray[byte]): CryptoResult[Signature] {.gcsafe.} =
+proc sign*(key: PrivateKey, data: openArray[byte]): CryptoResult[Signature] {.gcsafe.} =
   ## Sign message ``data`` using private key ``key`` and return generated
   ## signature in raw binary form.
   var res: Signature
-  case key.scheme:
+  case key.scheme
   of PKScheme.RSA:
     when supported(PKScheme.RSA):
-      let sig = ? key.rsakey.sign(data).orError(SigError)
-      res.data = ? sig.getBytes().orError(SigError)
+      let sig = ?key.rsakey.sign(data).orError(SigError)
+      res.data = ?sig.getBytes().orError(SigError)
       ok(res)
     else:
       err(SchemeError)
@@ -737,8 +774,8 @@ proc sign*(key: PrivateKey,
       err(SchemeError)
   of PKScheme.ECDSA:
     when supported(PKScheme.ECDSA):
-      let sig = ? key.eckey.sign(data).orError(SigError)
-      res.data = ? sig.getBytes().orError(SigError)
+      let sig = ?key.eckey.sign(data).orError(SigError)
+      res.data = ?sig.getBytes().orError(SigError)
       ok(res)
     else:
       err(SchemeError)
@@ -753,7 +790,7 @@ proc sign*(key: PrivateKey,
 proc verify*(sig: Signature, message: openArray[byte], key: PublicKey): bool =
   ## Verify signature ``sig`` using message ``message`` and public key ``key``.
   ## Return ``true`` if message signature is valid.
-  case key.scheme:
+  case key.scheme
   of PKScheme.RSA:
     when supported(PKScheme.RSA):
       var signature: RsaSignature
@@ -791,12 +828,12 @@ proc verify*(sig: Signature, message: openArray[byte], key: PublicKey): bool =
     else:
       false
 
-template makeSecret(buffer, hmactype, secret, seed: untyped) {.dirty.}=
+template makeSecret(buffer, hmactype, secret, seed: untyped) {.dirty.} =
   var ctx: hmactype
   var j = 0
   # We need to strip leading zeros, because Go bigint serialization do it.
   var offset = 0
-  for i in 0..<len(secret):
+  for i in 0 ..< len(secret):
     if secret[i] != 0x00'u8:
       break
     inc(offset)
@@ -817,8 +854,9 @@ template makeSecret(buffer, hmactype, secret, seed: untyped) {.dirty.}=
     ctx.update(a.data)
     a = ctx.finish()
 
-proc stretchKeys*(cipherType: string, hashType: string,
-                  sharedSecret: seq[byte]): Secret =
+proc stretchKeys*(
+    cipherType: string, hashType: string, sharedSecret: seq[byte]
+): Secret =
   ## Expand shared secret to cryptographic keys.
   if cipherType == "AES-128":
     result.ivsize = aes128.sizeBlock
@@ -844,65 +882,57 @@ template goffset*(secret, id, o: untyped): untyped =
   id * (len(secret.data) shr 1) + o
 
 template ivOpenArray*(secret: Secret, id: int): untyped =
-  toOpenArray(secret.data, goffset(secret, id, 0),
-              goffset(secret, id, secret.ivsize - 1))
+  toOpenArray(
+    secret.data, goffset(secret, id, 0), goffset(secret, id, secret.ivsize - 1)
+  )
 
 template keyOpenArray*(secret: Secret, id: int): untyped =
-  toOpenArray(secret.data, goffset(secret, id, secret.ivsize),
-              goffset(secret, id, secret.ivsize + secret.keysize - 1))
+  toOpenArray(
+    secret.data,
+    goffset(secret, id, secret.ivsize),
+    goffset(secret, id, secret.ivsize + secret.keysize - 1),
+  )
 
 template macOpenArray*(secret: Secret, id: int): untyped =
-  toOpenArray(secret.data, goffset(secret, id, secret.ivsize + secret.keysize),
-       goffset(secret, id, secret.ivsize + secret.keysize + secret.macsize - 1))
+  toOpenArray(
+    secret.data,
+    goffset(secret, id, secret.ivsize + secret.keysize),
+    goffset(secret, id, secret.ivsize + secret.keysize + secret.macsize - 1),
+  )
 
 proc iv*(secret: Secret, id: int): seq[byte] {.inline.} =
   ## Get array of bytes with with initial vector.
   result = newSeq[byte](secret.ivsize)
-  var offset = if id == 0: 0 else: (len(secret.data) div 2)
+  var offset =
+    if id == 0:
+      0
+    else:
+      (len(secret.data) div 2)
   copyMem(addr result[0], unsafeAddr secret.data[offset], secret.ivsize)
 
 proc key*(secret: Secret, id: int): seq[byte] {.inline.} =
   result = newSeq[byte](secret.keysize)
-  var offset = if id == 0: 0 else: (len(secret.data) div 2)
+  var offset =
+    if id == 0:
+      0
+    else:
+      (len(secret.data) div 2)
   offset += secret.ivsize
   copyMem(addr result[0], unsafeAddr secret.data[offset], secret.keysize)
 
 proc mac*(secret: Secret, id: int): seq[byte] {.inline.} =
   result = newSeq[byte](secret.macsize)
-  var offset = if id == 0: 0 else: (len(secret.data) div 2)
+  var offset =
+    if id == 0:
+      0
+    else:
+      (len(secret.data) div 2)
   offset += secret.ivsize + secret.keysize
   copyMem(addr result[0], unsafeAddr secret.data[offset], secret.macsize)
 
-proc ephemeral*(
-    scheme: ECDHEScheme,
-    rng: var HmacDrbgContext): CryptoResult[EcKeyPair] =
-  ## Generate ephemeral keys used to perform ECDHE.
-  var keypair: EcKeyPair
-  if scheme == Secp256r1:
-    keypair = ? EcKeyPair.random(Secp256r1, rng).orError(KeyError)
-  elif scheme == Secp384r1:
-    keypair = ? EcKeyPair.random(Secp384r1, rng).orError(KeyError)
-  elif scheme == Secp521r1:
-    keypair = ? EcKeyPair.random(Secp521r1, rng).orError(KeyError)
-  ok(keypair)
-
-proc ephemeral*(
-    scheme: string, rng: var HmacDrbgContext): CryptoResult[EcKeyPair] =
-  ## Generate ephemeral keys used to perform ECDHE using string encoding.
-  ##
-  ## Currently supported encoding strings are P-256, P-384, P-521, if encoding
-  ## string is not supported P-521 key will be generated.
-  if scheme == "P-256":
-    ephemeral(Secp256r1, rng)
-  elif scheme == "P-384":
-    ephemeral(Secp384r1, rng)
-  elif scheme == "P-521":
-    ephemeral(Secp521r1, rng)
-  else:
-    ephemeral(Secp521r1, rng)
-
-proc getOrder*(remotePubkey, localNonce: openArray[byte],
-               localPubkey, remoteNonce: openArray[byte]): CryptoResult[int] =
+proc getOrder*(
+    remotePubkey, localNonce: openArray[byte], localPubkey, remoteNonce: openArray[byte]
+): CryptoResult[int] =
   ## Compare values and calculate `order` parameter.
   var ctx: sha256
   ctx.init()
@@ -913,9 +943,9 @@ proc getOrder*(remotePubkey, localNonce: openArray[byte],
   ctx.update(localPubkey)
   ctx.update(remoteNonce)
   var digest2 = ctx.finish()
-  var mh1 = ? MultiHash.init(multiCodec("sha2-256"), digest1).orError(HashError)
-  var mh2 = ? MultiHash.init(multiCodec("sha2-256"), digest2).orError(HashError)
-  var res = 0;
+  var mh1 = ?MultiHash.init(multiCodec("sha2-256"), digest1).orError(HashError)
+  var mh2 = ?MultiHash.init(multiCodec("sha2-256"), digest2).orError(HashError)
+  var res = 0
   for i in 0 ..< len(mh1.data.buffer):
     res = int(mh1.data.buffer[i]) - int(mh2.data.buffer[i])
     if res != 0:
@@ -946,96 +976,45 @@ proc selectBest*(order: int, p1, p2: string): string =
       if felement == selement:
         return felement
 
-proc createProposal*(nonce, pubkey: openArray[byte],
-                     exchanges, ciphers, hashes: string): seq[byte] =
-  ## Create SecIO proposal message using random ``nonce``, local public key
-  ## ``pubkey``, comma-delimieted list of supported exchange schemes
-  ## ``exchanges``, comma-delimeted list of supported ciphers ``ciphers`` and
-  ## comma-delimeted list of supported hashes ``hashes``.
-  var msg = initProtoBuffer({WithUint32BeLength})
-  msg.write(1, nonce)
-  msg.write(2, pubkey)
-  msg.write(3, exchanges)
-  msg.write(4, ciphers)
-  msg.write(5, hashes)
-  msg.finish()
-  msg.buffer
-
-proc decodeProposal*(message: seq[byte], nonce, pubkey: var seq[byte],
-                     exchanges, ciphers, hashes: var string): bool =
-  ## Parse incoming proposal message and decode remote random nonce ``nonce``,
-  ## remote public key ``pubkey``, comma-delimieted list of supported exchange
-  ## schemes ``exchanges``, comma-delimeted list of supported ciphers
-  ## ``ciphers`` and comma-delimeted list of supported hashes ``hashes``.
-  ##
-  ## Procedure returns ``true`` on success and ``false`` on error.
-  var pb = initProtoBuffer(message)
-  let r1 = pb.getField(1, nonce)
-  let r2 = pb.getField(2, pubkey)
-  let r3 = pb.getField(3, exchanges)
-  let r4 = pb.getField(4, ciphers)
-  let r5 = pb.getField(5, hashes)
-
-  r1.isOk() and r1.get() and r2.isOk() and r2.get() and
-  r3.isOk() and r3.get() and r4.isOk() and r4.get() and
-  r5.isOk() and r5.get()
-
-proc createExchange*(epubkey, signature: openArray[byte]): seq[byte] =
-  ## Create SecIO exchange message using ephemeral public key ``epubkey`` and
-  ## signature of proposal blocks ``signature``.
-  var msg = initProtoBuffer({WithUint32BeLength})
-  msg.write(1, epubkey)
-  msg.write(2, signature)
-  msg.finish()
-  msg.buffer
-
-proc decodeExchange*(message: seq[byte],
-                     pubkey, signature: var seq[byte]): bool =
-  ## Parse incoming exchange message and decode remote ephemeral public key
-  ## ``pubkey`` and signature ``signature``.
-  ##
-  ## Procedure returns ``true`` on success and ``false`` on error.
-  var pb = initProtoBuffer(message)
-  let r1 = pb.getField(1, pubkey)
-  let r2 = pb.getField(2, signature)
-  r1.isOk() and r1.get() and r2.isOk() and r2.get()
-
 ## Serialization/Deserialization helpers
 
-proc write*(vb: var VBuffer, pubkey: PublicKey) {.
-     inline, raises: [Defect, ResultError[CryptoError]].} =
+proc write*(
+    vb: var VBuffer, pubkey: PublicKey
+) {.inline, raises: [ResultError[CryptoError]].} =
   ## Write PublicKey value ``pubkey`` to buffer ``vb``.
   vb.writeSeq(pubkey.getBytes().tryGet())
 
-proc write*(vb: var VBuffer, seckey: PrivateKey) {.
-     inline, raises: [Defect, ResultError[CryptoError]].} =
+proc write*(
+    vb: var VBuffer, seckey: PrivateKey
+) {.inline, raises: [ResultError[CryptoError]].} =
   ## Write PrivateKey value ``seckey`` to buffer ``vb``.
   vb.writeSeq(seckey.getBytes().tryGet())
 
-proc write*(vb: var VBuffer, sig: PrivateKey) {.
-     inline, raises: [Defect, ResultError[CryptoError]].} =
+proc write*(
+    vb: var VBuffer, sig: PrivateKey
+) {.inline, raises: [ResultError[CryptoError]].} =
   ## Write Signature value ``sig`` to buffer ``vb``.
   vb.writeSeq(sig.getBytes().tryGet())
 
-proc write*[T: PublicKey|PrivateKey](pb: var ProtoBuffer, field: int,
-                                     key: T) {.
-     inline, raises: [Defect, ResultError[CryptoError]].} =
+proc write*[T: PublicKey | PrivateKey](
+    pb: var ProtoBuffer, field: int, key: T
+) {.inline, raises: [ResultError[CryptoError]].} =
   write(pb, field, key.getBytes().tryGet())
 
-proc write*(pb: var ProtoBuffer, field: int, sig: Signature) {.
-     inline, raises: [Defect].} =
+proc write*(pb: var ProtoBuffer, field: int, sig: Signature) {.inline, raises: [].} =
   write(pb, field, sig.getBytes())
 
-proc getField*[T: PublicKey|PrivateKey](pb: ProtoBuffer, field: int,
-                                        value: var T): ProtoResult[bool] =
+proc getField*[T: PublicKey | PrivateKey](
+    pb: ProtoBuffer, field: int, value: var T
+): ProtoResult[bool] =
   ## Deserialize public/private key from protobuf's message ``pb`` using field
   ## index ``field``.
   ##
   ## On success deserialized key will be stored in ``value``.
   var buffer: seq[byte]
   var key: T
-  let res = ? pb.getField(field, buffer)
-  if not(res):
+  let res = ?pb.getField(field, buffer)
+  if not (res):
     ok(false)
   else:
     if key.init(buffer):
@@ -1044,16 +1023,15 @@ proc getField*[T: PublicKey|PrivateKey](pb: ProtoBuffer, field: int,
     else:
       err(ProtoError.IncorrectBlob)
 
-proc getField*(pb: ProtoBuffer, field: int,
-               value: var Signature): ProtoResult[bool] =
+proc getField*(pb: ProtoBuffer, field: int, value: var Signature): ProtoResult[bool] =
   ## Deserialize signature from protobuf's message ``pb`` using field index
   ## ``field``.
   ##
   ## On success deserialized signature will be stored in ``value``.
   var buffer: seq[byte]
   var sig: Signature
-  let res = ? pb.getField(field, buffer)
-  if not(res):
+  let res = ?pb.getField(field, buffer)
+  if not (res):
     ok(false)
   else:
     if sig.init(buffer):

libp2p/crypto/curve25519.nim

@@ -15,18 +15,14 @@
 
 # RFC @ https://tools.ietf.org/html/rfc7748
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import bearssl/[ec, rand, hash]
+import bearssl/[ec, rand]
 import stew/results
 from stew/assign2 import assign
 export results
 
-const
-  Curve25519KeySize* = 32
+const Curve25519KeySize* = 32
 
 type
   Curve25519* = object
@@ -38,12 +34,12 @@ proc intoCurve25519Key*(s: openArray[byte]): Curve25519Key =
   assert s.len == Curve25519KeySize
   assign(result, s)
 
-proc getBytes*(key: Curve25519Key): seq[byte] = @key
+proc getBytes*(key: Curve25519Key): seq[byte] =
+  @key
 
 proc byteswap(buf: var Curve25519Key) {.inline.} =
-  for i in 0..<16:
-    let
-      x = buf[i]
+  for i in 0 ..< 16:
+    let x = buf[i]
     buf[i] = buf[31 - i]
     buf[31 - i] = x
 
@@ -51,31 +47,25 @@ proc mul*(_: type[Curve25519], point: var Curve25519Key, multiplier: Curve25519K
   let defaultBrEc = ecGetDefault()
 
   # multiplier needs to be big-endian
-  var
-    multiplierBs = multiplier
+  var multiplierBs = multiplier
   multiplierBs.byteswap()
-  let
-    res = defaultBrEc.mul(
-      addr point[0],
-      Curve25519KeySize,
-      addr multiplierBs[0],
-      Curve25519KeySize,
-      EC_curve25519)
+  let res = defaultBrEc.mul(
+    addr point[0],
+    Curve25519KeySize,
+    addr multiplierBs[0],
+    Curve25519KeySize,
+    EC_curve25519,
+  )
   assert res == 1
 
 proc mulgen(_: type[Curve25519], dst: var Curve25519Key, point: Curve25519Key) =
   let defaultBrEc = ecGetDefault()
 
-  var
-    rpoint = point
+  var rpoint = point
   rpoint.byteswap()
 
-  let
-    size = defaultBrEc.mulgen(
-      addr dst[0],
-      addr rpoint[0],
-      Curve25519KeySize,
-      EC_curve25519)
+  let size =
+    defaultBrEc.mulgen(addr dst[0], addr rpoint[0], Curve25519KeySize, EC_curve25519)
 
   assert size == Curve25519KeySize
 
@@ -86,7 +76,8 @@ proc random*(_: type[Curve25519Key], rng: var HmacDrbgContext): Curve25519Key =
   var res: Curve25519Key
   let defaultBrEc = ecGetDefault()
   let len = ecKeygen(
-    addr rng.vtable, defaultBrEc, nil, addr res[0], EC_curve25519)
+    PrngClassPointerConst(addr rng.vtable), defaultBrEc, nil, addr res[0], EC_curve25519
+  )
   # Per bearssl documentation, the keygen only fails if the curve is
   # unrecognised -
   doAssert len == Curve25519KeySize, "Could not generate curve"

libp2p/crypto/ecnist.nim

@@ -14,10 +14,7 @@
 ## BearSSL library <https://bearssl.org/>
 ## Copyright(C) 2018 Thomas Pornin <pornin@bolet.org>.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import bearssl/[ec, rand, hash]
 # We use `ncrutils` for constant-time hexadecimal encoding/decoding procedures.
@@ -25,6 +22,9 @@ import nimcrypto/utils as ncrutils
 import minasn1
 export minasn1.Asn1Error
 import stew/[results, ctops]
+
+import ../utility
+
 export results
 
 const
@@ -58,23 +58,22 @@ type
     buffer*: seq[byte]
 
   EcCurveKind* = enum
-    Secp256r1 = EC_secp256r1,
-    Secp384r1 = EC_secp384r1,
+    Secp256r1 = EC_secp256r1
+    Secp384r1 = EC_secp384r1
     Secp521r1 = EC_secp521r1
 
   EcPKI* = EcPrivateKey | EcPublicKey | EcSignature
 
   EcError* = enum
-    EcRngError,
-    EcKeyGenError,
-    EcPublicKeyError,
-    EcKeyIncorrectError,
+    EcRngError
+    EcKeyGenError
+    EcPublicKeyError
+    EcKeyIncorrectError
     EcSignatureError
 
   EcResult*[T] = Result[T, EcError]
 
-const
-  EcSupportedCurvesCint* = {cint(Secp256r1), cint(Secp384r1), cint(Secp521r1)}
+const EcSupportedCurvesCint* = @[cint(Secp256r1), cint(Secp384r1), cint(Secp521r1)]
 
 proc `-`(x: uint32): uint32 {.inline.} =
   result = (0xFFFF_FFFF'u32 - x) + 1'u32
@@ -88,7 +87,7 @@ proc CMP(x, y: uint32): int32 {.inline.} =
 
 proc EQ0(x: int32): uint32 {.inline.} =
   var q = cast[uint32](x)
-  result = not(q or -q) shr 31
+  result = not (q or -q) shr 31
 
 proc NEQ(x, y: uint32): uint32 {.inline.} =
   var q = cast[uint32](x xor y)
@@ -113,7 +112,7 @@ proc checkScalar(scalar: openArray[byte], curve: cint): uint32 =
   for u in scalar:
     z = z or u
   if len(scalar) == int(orderlen):
-    for i in 0..<len(scalar):
+    for i in 0 ..< len(scalar):
       c = c or (-(cast[int32](EQ0(c))) and CMP(scalar[i], order[i]))
   else:
     c = -1
@@ -126,8 +125,7 @@ proc checkPublic(key: openArray[byte], curve: cint): uint32 =
   var impl = ecGetDefault()
   var orderlen: uint = 0
   discard impl.order(curve, orderlen)
-  result = impl.mul(unsafeAddr ckey[0], uint(len(ckey)),
-                    addr x[0], uint(len(x)), curve)
+  result = impl.mul(unsafeAddr ckey[0], uint(len(ckey)), addr x[0], uint(len(x)), curve)
 
 proc getOffset(pubkey: EcPublicKey): int {.inline.} =
   let o = cast[uint](pubkey.key.q) - cast[uint](unsafeAddr pubkey.buffer[0])
@@ -145,21 +143,15 @@ proc getOffset(seckey: EcPrivateKey): int {.inline.} =
 
 template getPublicKeyLength*(curve: EcCurveKind): int =
   case curve
-  of Secp256r1:
-    PubKey256Length
-  of Secp384r1:
-    PubKey384Length
-  of Secp521r1:
-    PubKey521Length
+  of Secp256r1: PubKey256Length
+  of Secp384r1: PubKey384Length
+  of Secp521r1: PubKey521Length
 
 template getPrivateKeyLength*(curve: EcCurveKind): int =
   case curve
-  of Secp256r1:
-    SecKey256Length
-  of Secp384r1:
-    SecKey384Length
-  of Secp521r1:
-    SecKey521Length
+  of Secp256r1: SecKey256Length
+  of Secp384r1: SecKey384Length
+  of Secp521r1: SecKey521Length
 
 proc copy*[T: EcPKI](dst: var T, src: T): bool =
   ## Copy EC `private key`, `public key` or `signature` ``src`` to ``dst``.
@@ -201,7 +193,7 @@ proc copy*[T: EcPKI](src: T): T {.inline.} =
   if not copy(result, src):
     raise newException(EcKeyIncorrectError, "Incorrect key or signature")
 
-proc clear*[T: EcPKI|EcKeyPair](pki: var T) =
+proc clear*[T: EcPKI | EcKeyPair](pki: var T) =
   ## Wipe and clear EC `private key`, `public key` or `signature` object.
   doAssert(not isNil(pki))
   when T is EcPrivateKey:
@@ -232,8 +224,8 @@ proc clear*[T: EcPKI|EcKeyPair](pki: var T) =
     pki.pubkey.key.curve = 0
 
 proc random*(
-    T: typedesc[EcPrivateKey], kind: EcCurveKind,
-    rng: var HmacDrbgContext): EcResult[EcPrivateKey] =
+    T: typedesc[EcPrivateKey], kind: EcCurveKind, rng: var HmacDrbgContext
+): EcResult[EcPrivateKey] =
   ## Generate new random EC private key using BearSSL's HMAC-SHA256-DRBG
   ## algorithm.
   ##
@@ -241,9 +233,13 @@ proc random*(
   ## secp521r1).
   var ecimp = ecGetDefault()
   var res = new EcPrivateKey
-  if ecKeygen(addr rng.vtable, ecimp,
-                addr res.key, addr res.buffer[0],
-                cast[cint](kind)) == 0:
+  if ecKeygen(
+    PrngClassPointerConst(addr rng.vtable),
+    ecimp,
+    addr res.key,
+    addr res.buffer[0],
+    safeConvert[cint](kind),
+  ) == 0:
     err(EcKeyGenError)
   else:
     ok(res)
@@ -257,8 +253,7 @@ proc getPublicKey*(seckey: EcPrivateKey): EcResult[EcPublicKey] =
   if seckey.key.curve in EcSupportedCurvesCint:
     var res = new EcPublicKey
     assert res.buffer.len > getPublicKeyLength(cast[EcCurveKind](seckey.key.curve))
-    if ecComputePub(ecimp, addr res.key,
-                    addr res.buffer[0], unsafeAddr seckey.key) == 0:
+    if ecComputePub(ecimp, addr res.key, addr res.buffer[0], unsafeAddr seckey.key) == 0:
       err(EcKeyIncorrectError)
     else:
       ok(res)
@@ -266,23 +261,23 @@ proc getPublicKey*(seckey: EcPrivateKey): EcResult[EcPublicKey] =
     err(EcKeyIncorrectError)
 
 proc random*(
-    T: typedesc[EcKeyPair], kind: EcCurveKind,
-    rng: var HmacDrbgContext): EcResult[T] =
+    T: typedesc[EcKeyPair], kind: EcCurveKind, rng: var HmacDrbgContext
+): EcResult[T] =
   ## Generate new random EC private and public keypair using BearSSL's
   ## HMAC-SHA256-DRBG algorithm.
   ##
   ## ``kind`` elliptic curve kind of your choice (secp256r1, secp384r1 or
   ## secp521r1).
   let
-    seckey = ? EcPrivateKey.random(kind, rng)
-    pubkey = ? seckey.getPublicKey()
+    seckey = ?EcPrivateKey.random(kind, rng)
+    pubkey = ?seckey.getPublicKey()
     key = EcKeyPair(seckey: seckey, pubkey: pubkey)
   ok(key)
 
 proc `$`*(seckey: EcPrivateKey): string =
   ## Return string representation of EC private key.
   if isNil(seckey) or seckey.key.curve == 0 or seckey.key.xlen == 0 or
-     len(seckey.buffer) == 0:
+      len(seckey.buffer) == 0:
     result = "Empty or uninitialized ECNIST key"
   else:
     if seckey.key.curve notin EcSupportedCurvesCint:
@@ -298,7 +293,7 @@ proc `$`*(seckey: EcPrivateKey): string =
 proc `$`*(pubkey: EcPublicKey): string =
   ## Return string representation of EC public key.
   if isNil(pubkey) or pubkey.key.curve == 0 or pubkey.key.qlen == 0 or
-     len(pubkey.buffer) == 0:
+      len(pubkey.buffer) == 0:
     result = "Empty or uninitialized ECNIST key"
   else:
     if pubkey.key.curve notin EcSupportedCurvesCint:
@@ -371,7 +366,7 @@ proc toBytes*(seckey: EcPrivateKey, data: var openArray[byte]): EcResult[int] =
     return err(EcKeyIncorrectError)
   if seckey.key.curve in EcSupportedCurvesCint:
     var offset, length: int
-    var pubkey = ? seckey.getPublicKey()
+    var pubkey = ?seckey.getPublicKey()
     var b = Asn1Buffer.init()
     var p = Asn1Composite.init(Asn1Tag.Sequence)
     var c0 = Asn1Composite.init(0)
@@ -387,16 +382,14 @@ proc toBytes*(seckey: EcPrivateKey, data: var openArray[byte]): EcResult[int] =
     if offset < 0:
       return err(EcKeyIncorrectError)
     length = int(pubkey.key.qlen)
-    c1.write(Asn1Tag.BitString,
-             pubkey.buffer.toOpenArray(offset, offset + length - 1))
+    c1.write(Asn1Tag.BitString, pubkey.buffer.toOpenArray(offset, offset + length - 1))
     c1.finish()
     offset = seckey.getOffset()
     if offset < 0:
       return err(EcKeyIncorrectError)
     length = int(seckey.key.xlen)
     p.write(1'u64)
-    p.write(Asn1Tag.OctetString,
-            seckey.buffer.toOpenArray(offset, offset + length - 1))
+    p.write(Asn1Tag.OctetString, seckey.buffer.toOpenArray(offset, offset + length - 1))
     p.write(c0)
     p.write(c1)
     p.finish()
@@ -410,7 +403,6 @@ proc toBytes*(seckey: EcPrivateKey, data: var openArray[byte]): EcResult[int] =
   else:
     err(EcKeyIncorrectError)
 
-
 proc toBytes*(pubkey: EcPublicKey, data: var openArray[byte]): EcResult[int] =
   ## Serialize EC public key ``pubkey`` to ASN.1 DER binary form and store it
   ## to ``data``.
@@ -436,8 +428,7 @@ proc toBytes*(pubkey: EcPublicKey, data: var openArray[byte]): EcResult[int] =
     if offset < 0:
       return err(EcKeyIncorrectError)
     let length = int(pubkey.key.qlen)
-    p.write(Asn1Tag.BitString,
-            pubkey.buffer.toOpenArray(offset, offset + length - 1))
+    p.write(Asn1Tag.BitString, pubkey.buffer.toOpenArray(offset, offset + length - 1))
     p.finish()
     b.write(p)
     b.finish()
@@ -467,9 +458,9 @@ proc getBytes*(seckey: EcPrivateKey): EcResult[seq[byte]] =
     return err(EcKeyIncorrectError)
   if seckey.key.curve in EcSupportedCurvesCint:
     var res = newSeq[byte]()
-    let length = ? seckey.toBytes(res)
+    let length = ?seckey.toBytes(res)
     res.setLen(length)
-    discard ? seckey.toBytes(res)
+    discard ?seckey.toBytes(res)
     ok(res)
   else:
     err(EcKeyIncorrectError)
@@ -480,9 +471,9 @@ proc getBytes*(pubkey: EcPublicKey): EcResult[seq[byte]] =
     return err(EcKeyIncorrectError)
   if pubkey.key.curve in EcSupportedCurvesCint:
     var res = newSeq[byte]()
-    let length = ? pubkey.toBytes(res)
+    let length = ?pubkey.toBytes(res)
     res.setLen(length)
-    discard ? pubkey.toBytes(res)
+    discard ?pubkey.toBytes(res)
     ok(res)
   else:
     err(EcKeyIncorrectError)
@@ -492,9 +483,9 @@ proc getBytes*(sig: EcSignature): EcResult[seq[byte]] =
   if isNil(sig):
     return err(EcSignatureError)
   var res = newSeq[byte]()
-  let length = ? sig.toBytes(res)
+  let length = ?sig.toBytes(res)
   res.setLen(length)
-  discard ? sig.toBytes(res)
+  discard ?sig.toBytes(res)
   ok(res)
 
 proc getRawBytes*(seckey: EcPrivateKey): EcResult[seq[byte]] =
@@ -503,9 +494,9 @@ proc getRawBytes*(seckey: EcPrivateKey): EcResult[seq[byte]] =
     return err(EcKeyIncorrectError)
   if seckey.key.curve in EcSupportedCurvesCint:
     var res = newSeq[byte]()
-    let length = ? seckey.toRawBytes(res)
+    let length = ?seckey.toRawBytes(res)
     res.setLen(length)
-    discard ? seckey.toRawBytes(res)
+    discard ?seckey.toRawBytes(res)
     ok(res)
   else:
     err(EcKeyIncorrectError)
@@ -516,9 +507,9 @@ proc getRawBytes*(pubkey: EcPublicKey): EcResult[seq[byte]] =
     return err(EcKeyIncorrectError)
   if pubkey.key.curve in EcSupportedCurvesCint:
     var res = newSeq[byte]()
-    let length = ? pubkey.toRawBytes(res)
+    let length = ?pubkey.toRawBytes(res)
     res.setLen(length)
-    discard ? pubkey.toRawBytes(res)
+    discard ?pubkey.toRawBytes(res)
     return ok(res)
   else:
     return err(EcKeyIncorrectError)
@@ -528,9 +519,9 @@ proc getRawBytes*(sig: EcSignature): EcResult[seq[byte]] =
   if isNil(sig):
     return err(EcSignatureError)
   var res = newSeq[byte]()
-  let length = ? sig.toBytes(res)
+  let length = ?sig.toBytes(res)
   res.setLen(length)
-  discard ? sig.toBytes(res)
+  discard ?sig.toBytes(res)
   ok(res)
 
 proc `==`*(pubkey1, pubkey2: EcPublicKey): bool =
@@ -550,8 +541,10 @@ proc `==`*(pubkey1, pubkey2: EcPublicKey): bool =
     let op2 = pubkey2.getOffset()
     if op1 == -1 or op2 == -1:
       return false
-    return CT.isEqual(pubkey1.buffer.toOpenArray(op1, pubkey1.key.qlen - 1),
-                      pubkey2.buffer.toOpenArray(op2, pubkey2.key.qlen - 1))
+    return CT.isEqual(
+      pubkey1.buffer.toOpenArray(op1, pubkey1.key.qlen - 1),
+      pubkey2.buffer.toOpenArray(op2, pubkey2.key.qlen - 1),
+    )
 
 proc `==`*(seckey1, seckey2: EcPrivateKey): bool =
   ## Returns ``true`` if both keys ``seckey1`` and ``seckey2`` are equal.
@@ -570,8 +563,10 @@ proc `==`*(seckey1, seckey2: EcPrivateKey): bool =
     let op2 = seckey2.getOffset()
     if op1 == -1 or op2 == -1:
       return false
-    return CT.isEqual(seckey1.buffer.toOpenArray(op1, seckey1.key.xlen - 1),
-                      seckey2.buffer.toOpenArray(op2, seckey2.key.xlen - 1))
+    return CT.isEqual(
+      seckey1.buffer.toOpenArray(op1, seckey1.key.xlen - 1),
+      seckey2.buffer.toOpenArray(op2, seckey2.key.xlen - 1),
+    )
 
 proc `==`*(a, b: EcSignature): bool =
   ## Return ``true`` if both signatures ``sig1`` and ``sig2`` are equal.
@@ -605,36 +600,36 @@ proc init*(key: var EcPrivateKey, data: openArray[byte]): Result[void, Asn1Error
 
   var ab = Asn1Buffer.init(data)
 
-  field = ? ab.read()
+  field = ?ab.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var ib = field.getBuffer()
 
-  field = ? ib.read()
+  field = ?ib.read()
 
   if field.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
   if field.vint != 1'u64:
     return err(Asn1Error.Incorrect)
 
-  raw = ? ib.read()
+  raw = ?ib.read()
 
   if raw.kind != Asn1Tag.OctetString:
     return err(Asn1Error.Incorrect)
 
-  oid = ? ib.read()
+  oid = ?ib.read()
 
   if oid.kind != Asn1Tag.Oid:
     return err(Asn1Error.Incorrect)
 
   if oid == Asn1OidSecp256r1:
-    curve = cast[cint](Secp256r1)
+    curve = safeConvert[cint](Secp256r1)
   elif oid == Asn1OidSecp384r1:
-    curve = cast[cint](Secp384r1)
+    curve = safeConvert[cint](Secp384r1)
   elif oid == Asn1OidSecp521r1:
-    curve = cast[cint](Secp521r1)
+    curve = safeConvert[cint](Secp521r1)
   else:
     return err(Asn1Error.Incorrect)
 
@@ -658,19 +653,19 @@ proc init*(pubkey: var EcPublicKey, data: openArray[byte]): Result[void, Asn1Err
 
   var ab = Asn1Buffer.init(data)
 
-  field = ? ab.read()
+  field = ?ab.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var ib = field.getBuffer()
-  field = ? ib.read()
+  field = ?ib.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var ob = field.getBuffer()
-  oid = ? ob.read()
+  oid = ?ob.read()
 
   if oid.kind != Asn1Tag.Oid:
     return err(Asn1Error.Incorrect)
@@ -678,21 +673,21 @@ proc init*(pubkey: var EcPublicKey, data: openArray[byte]): Result[void, Asn1Err
   if oid != Asn1OidEcPublicKey:
     return err(Asn1Error.Incorrect)
 
-  oid = ? ob.read()
+  oid = ?ob.read()
 
   if oid.kind != Asn1Tag.Oid:
     return err(Asn1Error.Incorrect)
 
   if oid == Asn1OidSecp256r1:
-    curve = cast[cint](Secp256r1)
+    curve = safeConvert[cint](Secp256r1)
   elif oid == Asn1OidSecp384r1:
-    curve = cast[cint](Secp384r1)
+    curve = safeConvert[cint](Secp384r1)
   elif oid == Asn1OidSecp521r1:
-    curve = cast[cint](Secp521r1)
+    curve = safeConvert[cint](Secp521r1)
   else:
     return err(Asn1Error.Incorrect)
 
-  raw = ? ib.read()
+  raw = ?ib.read()
 
   if raw.kind != Asn1Tag.BitString:
     return err(Asn1Error.Incorrect)
@@ -718,16 +713,14 @@ proc init*(sig: var EcSignature, data: openArray[byte]): Result[void, Asn1Error]
   else:
     err(Asn1Error.Incorrect)
 
-proc init*[T: EcPKI](sospk: var T,
-                     data: string): Result[void, Asn1Error] {.inline.} =
+proc init*[T: EcPKI](sospk: var T, data: string): Result[void, Asn1Error] {.inline.} =
   ## Initialize EC `private key`, `public key` or `signature` ``sospk`` from
   ## ASN.1 DER hexadecimal string representation ``data``.
   ##
   ## Procedure returns ``Asn1Status``.
   sospk.init(ncrutils.fromHex(data))
 
-proc init*(t: typedesc[EcPrivateKey],
-           data: openArray[byte]): EcResult[EcPrivateKey] =
+proc init*(t: typedesc[EcPrivateKey], data: openArray[byte]): EcResult[EcPrivateKey] =
   ## Initialize EC private key from ASN.1 DER binary representation ``data`` and
   ## return constructed object.
   var key: EcPrivateKey
@@ -737,8 +730,7 @@ proc init*(t: typedesc[EcPrivateKey],
   else:
     ok(key)
 
-proc init*(t: typedesc[EcPublicKey],
-           data: openArray[byte]): EcResult[EcPublicKey] =
+proc init*(t: typedesc[EcPublicKey], data: openArray[byte]): EcResult[EcPublicKey] =
   ## Initialize EC public key from ASN.1 DER binary representation ``data`` and
   ## return constructed object.
   var key: EcPublicKey
@@ -748,8 +740,7 @@ proc init*(t: typedesc[EcPublicKey],
   else:
     ok(key)
 
-proc init*(t: typedesc[EcSignature],
-           data: openArray[byte]): EcResult[EcSignature] =
+proc init*(t: typedesc[EcSignature], data: openArray[byte]): EcResult[EcSignature] =
   ## Initialize EC signature from raw binary representation ``data`` and
   ## return constructed object.
   var sig: EcSignature
@@ -774,13 +765,13 @@ proc initRaw*(key: var EcPrivateKey, data: openArray[byte]): bool =
   ## Procedure returns ``true`` on success, ``false`` otherwise.
   var curve: cint
   if len(data) == SecKey256Length:
-    curve = cast[cint](Secp256r1)
+    curve = safeConvert[cint](Secp256r1)
     result = true
   elif len(data) == SecKey384Length:
-    curve = cast[cint](Secp384r1)
+    curve = safeConvert[cint](Secp384r1)
     result = true
   elif len(data) == SecKey521Length:
-    curve = cast[cint](Secp521r1)
+    curve = safeConvert[cint](Secp521r1)
     result = true
   if result:
     result = false
@@ -805,13 +796,13 @@ proc initRaw*(pubkey: var EcPublicKey, data: openArray[byte]): bool =
   if len(data) > 0:
     if data[0] == 0x04'u8:
       if len(data) == PubKey256Length:
-        curve = cast[cint](Secp256r1)
+        curve = safeConvert[cint](Secp256r1)
         result = true
       elif len(data) == PubKey384Length:
-        curve = cast[cint](Secp384r1)
+        curve = safeConvert[cint](Secp384r1)
         result = true
       elif len(data) == PubKey521Length:
-        curve = cast[cint](Secp521r1)
+        curve = safeConvert[cint](Secp521r1)
         result = true
   if result:
     result = false
@@ -832,8 +823,7 @@ proc initRaw*(sig: var EcSignature, data: openArray[byte]): bool =
   ##
   ## Procedure returns ``true`` on success, ``false`` otherwise.
   let length = len(data)
-  if (length == Sig256Length) or (length == Sig384Length) or
-     (length == Sig521Length):
+  if (length == Sig256Length) or (length == Sig384Length) or (length == Sig521Length):
     result = true
   if result:
     sig = new EcSignature
@@ -846,8 +836,9 @@ proc initRaw*[T: EcPKI](sospk: var T, data: string): bool {.inline.} =
   ## Procedure returns ``true`` on success, ``false`` otherwise.
   result = sospk.initRaw(ncrutils.fromHex(data))
 
-proc initRaw*(t: typedesc[EcPrivateKey],
-              data: openArray[byte]): EcResult[EcPrivateKey] =
+proc initRaw*(
+    t: typedesc[EcPrivateKey], data: openArray[byte]
+): EcResult[EcPrivateKey] =
   ## Initialize EC private key from raw binary representation ``data`` and
   ## return constructed object.
   var res: EcPrivateKey
@@ -856,8 +847,7 @@ proc initRaw*(t: typedesc[EcPrivateKey],
   else:
     ok(res)
 
-proc initRaw*(t: typedesc[EcPublicKey],
-              data: openArray[byte]): EcResult[EcPublicKey] =
+proc initRaw*(t: typedesc[EcPublicKey], data: openArray[byte]): EcResult[EcPublicKey] =
   ## Initialize EC public key from raw binary representation ``data`` and
   ## return constructed object.
   var res: EcPublicKey
@@ -866,8 +856,7 @@ proc initRaw*(t: typedesc[EcPublicKey],
   else:
     ok(res)
 
-proc initRaw*(t: typedesc[EcSignature],
-              data: openArray[byte]): EcResult[EcSignature] =
+proc initRaw*(t: typedesc[EcSignature], data: openArray[byte]): EcResult[EcSignature] =
   ## Initialize EC signature from raw binary representation ``data`` and
   ## return constructed object.
   var res: EcSignature
@@ -894,16 +883,19 @@ proc scalarMul*(pub: EcPublicKey, sec: EcPrivateKey): EcPublicKey =
         let poffset = key.getOffset()
         let soffset = sec.getOffset()
         if poffset >= 0 and soffset >= 0:
-          let res = impl.mul(addr key.buffer[poffset],
-                             key.key.qlen,
-                             unsafeAddr sec.buffer[soffset],
-                             sec.key.xlen,
-                             key.key.curve)
+          let res = impl.mul(
+            addr key.buffer[poffset],
+            key.key.qlen,
+            unsafeAddr sec.buffer[soffset],
+            sec.key.xlen,
+            key.key.curve,
+          )
           if res != 0:
             result = key
 
-proc toSecret*(pubkey: EcPublicKey, seckey: EcPrivateKey,
-               data: var openArray[byte]): int =
+proc toSecret*(
+    pubkey: EcPublicKey, seckey: EcPrivateKey, data: var openArray[byte]
+): int =
   ## Calculate ECDHE shared secret using Go's elliptic/curve approach, using
   ## remote public key ``pubkey`` and local private key ``seckey`` and store
   ## shared secret to ``data``.
@@ -939,8 +931,9 @@ proc getSecret*(pubkey: EcPublicKey, seckey: EcPrivateKey): seq[byte] =
     result = newSeq[byte](res)
     copyMem(addr result[0], addr data[0], res)
 
-proc sign*[T: byte|char](seckey: EcPrivateKey,
-                      message: openArray[T]): EcResult[EcSignature] {.gcsafe.} =
+proc sign*[T: byte | char](
+    seckey: EcPrivateKey, message: openArray[T]
+): EcResult[EcSignature] {.gcsafe.} =
   ## Get ECDSA signature of data ``message`` using private key ``seckey``.
   if isNil(seckey):
     return err(EcKeyIncorrectError)
@@ -957,8 +950,8 @@ proc sign*[T: byte|char](seckey: EcPrivateKey,
     else:
       kv.update(addr hc.vtable, nil, 0)
     kv.out(addr hc.vtable, addr hash[0])
-    let res = ecdsaI31SignAsn1(impl, kv, addr hash[0], addr seckey.key,
-                              addr sig.buffer[0])
+    let res =
+      ecdsaI31SignAsn1(impl, kv, addr hash[0], addr seckey.key, addr sig.buffer[0])
     # Clear context with initial value
     kv.init(addr hc.vtable)
     if res != 0:
@@ -969,8 +962,9 @@ proc sign*[T: byte|char](seckey: EcPrivateKey,
   else:
     err(EcKeyIncorrectError)
 
-proc verify*[T: byte|char](sig: EcSignature, message: openArray[T],
-                           pubkey: EcPublicKey): bool {.inline.} =
+proc verify*[T: byte | char](
+    sig: EcSignature, message: openArray[T], pubkey: EcPublicKey
+): bool {.inline.} =
   ## Verify ECDSA signature ``sig`` using public key ``pubkey`` and data
   ## ``message``.
   ##
@@ -988,9 +982,41 @@ proc verify*[T: byte|char](sig: EcSignature, message: openArray[T],
     else:
       kv.update(addr hc.vtable, nil, 0)
     kv.out(addr hc.vtable, addr hash[0])
-    let res = ecdsaI31VrfyAsn1(impl, addr hash[0], uint(len(hash)),
-                               unsafeAddr pubkey.key,
-                               addr sig.buffer[0], uint(len(sig.buffer)))
+    let res = ecdsaI31VrfyAsn1(
+      impl,
+      addr hash[0],
+      uint(len(hash)),
+      unsafeAddr pubkey.key,
+      addr sig.buffer[0],
+      uint(len(sig.buffer)),
+    )
     # Clear context with initial value
     kv.init(addr hc.vtable)
     result = (res == 1)
+
+type ECDHEScheme* = EcCurveKind
+
+proc ephemeral*(scheme: ECDHEScheme, rng: var HmacDrbgContext): EcResult[EcKeyPair] =
+  ## Generate ephemeral keys used to perform ECDHE.
+  var keypair: EcKeyPair
+  if scheme == Secp256r1:
+    keypair = ?EcKeyPair.random(Secp256r1, rng)
+  elif scheme == Secp384r1:
+    keypair = ?EcKeyPair.random(Secp384r1, rng)
+  elif scheme == Secp521r1:
+    keypair = ?EcKeyPair.random(Secp521r1, rng)
+  ok(keypair)
+
+proc ephemeral*(scheme: string, rng: var HmacDrbgContext): EcResult[EcKeyPair] =
+  ## Generate ephemeral keys used to perform ECDHE using string encoding.
+  ##
+  ## Currently supported encoding strings are P-256, P-384, P-521, if encoding
+  ## string is not supported P-521 key will be generated.
+  if scheme == "P-256":
+    ephemeral(Secp256r1, rng)
+  elif scheme == "P-384":
+    ephemeral(Secp384r1, rng)
+  elif scheme == "P-521":
+    ephemeral(Secp521r1, rng)
+  else:
+    ephemeral(Secp521r1, rng)

libp2p/crypto/hkdf.nim

@@ -9,28 +9,48 @@
 
 # https://tools.ietf.org/html/rfc5869
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import nimcrypto
-import bearssl/[kdf, rand, hash]
+import bearssl/[kdf, hash]
 
 type HkdfResult*[len: static int] = array[len, byte]
 
-proc hkdf*[T: sha256; len: static int](_: type[T]; salt, ikm, info: openArray[byte]; outputs: var openArray[HkdfResult[len]]) =
-  var
-    ctx: HkdfContext
+proc hkdf*[T: sha256, len: static int](
+    _: type[T],
+    salt, ikm, info: openArray[byte],
+    outputs: var openArray[HkdfResult[len]],
+) =
+  var ctx: HkdfContext
   hkdfInit(
-    ctx, addr sha256Vtable,
-    if salt.len > 0: unsafeAddr salt[0] else: nil, csize_t(salt.len))
+    ctx,
+    addr sha256Vtable,
+    if salt.len > 0:
+      unsafeAddr salt[0]
+    else:
+      nil
+    ,
+    csize_t(salt.len),
+  )
   hkdfInject(
-    ctx, if ikm.len > 0: unsafeAddr ikm[0] else: nil, csize_t(ikm.len))
+    ctx,
+    if ikm.len > 0:
+      unsafeAddr ikm[0]
+    else:
+      nil
+    ,
+    csize_t(ikm.len),
+  )
   hkdfFlip(ctx)
-  for i in 0..outputs.high:
+  for i in 0 .. outputs.high:
     discard hkdfProduce(
       ctx,
-      if info.len > 0: unsafeAddr info[0]
-      else: nil, csize_t(info.len),
-      addr outputs[i][0], csize_t(outputs[i].len))
+      if info.len > 0:
+        unsafeAddr info[0]
+      else:
+        nil
+      ,
+      csize_t(info.len),
+      addr outputs[i][0],
+      csize_t(outputs[i].len),
+    )

libp2p/crypto/minasn1.nim

@@ -9,47 +9,44 @@
 
 ## This module implements minimal ASN.1 encoding/decoding primitives.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import stew/[endians2, results, ctops]
 export results
 # We use `ncrutils` for constant-time hexadecimal encoding/decoding procedures.
 import nimcrypto/utils as ncrutils
+import ../utility
 
 type
   Asn1Error* {.pure.} = enum
-    Overflow,
-    Incomplete,
-    Indefinite,
-    Incorrect,
-    NoSupport,
+    Overflow
+    Incomplete
+    Indefinite
+    Incorrect
+    NoSupport
     Overrun
 
   Asn1Result*[T] = Result[T, Asn1Error]
 
   Asn1Class* {.pure.} = enum
-    Universal = 0x00,
+    Universal = 0x00
     Application = 0x01
     ContextSpecific = 0x02
     Private = 0x03
 
   Asn1Tag* {.pure.} = enum
     ## Protobuf's field types enum
-    NoSupport,
-    Boolean,
-    Integer,
-    BitString,
-    OctetString,
-    Null,
-    Oid,
-    Sequence,
+    NoSupport
+    Boolean
+    Integer
+    BitString
+    OctetString
+    Null
+    Oid
+    Sequence
     Context
 
-  Asn1Buffer* = object of RootObj
-    ## ASN.1's message representation object
+  Asn1Buffer* = object of RootObj ## ASN.1's message representation object
     buffer*: seq[byte]
     offset*: int
     length*: int
@@ -75,37 +72,23 @@ type
     idx*: int
 
 const
-  Asn1OidSecp256r1* = [
-    0x2A'u8, 0x86'u8, 0x48'u8, 0xCE'u8, 0x3D'u8, 0x03'u8, 0x01'u8, 0x07'u8
-  ]
+  Asn1OidSecp256r1* =
+    [0x2A'u8, 0x86'u8, 0x48'u8, 0xCE'u8, 0x3D'u8, 0x03'u8, 0x01'u8, 0x07'u8]
     ## Encoded OID for `secp256r1` curve (1.2.840.10045.3.1.7)
-  Asn1OidSecp384r1* = [
-    0x2B'u8, 0x81'u8, 0x04'u8, 0x00'u8, 0x22'u8
-  ]
+  Asn1OidSecp384r1* = [0x2B'u8, 0x81'u8, 0x04'u8, 0x00'u8, 0x22'u8]
     ## Encoded OID for `secp384r1` curve (1.3.132.0.34)
-  Asn1OidSecp521r1* = [
-    0x2B'u8, 0x81'u8, 0x04'u8, 0x00'u8, 0x23'u8
-  ]
+  Asn1OidSecp521r1* = [0x2B'u8, 0x81'u8, 0x04'u8, 0x00'u8, 0x23'u8]
     ## Encoded OID for `secp521r1` curve (1.3.132.0.35)
-  Asn1OidSecp256k1* = [
-    0x2B'u8, 0x81'u8, 0x04'u8, 0x00'u8, 0x0A'u8
-  ]
+  Asn1OidSecp256k1* = [0x2B'u8, 0x81'u8, 0x04'u8, 0x00'u8, 0x0A'u8]
     ## Encoded OID for `secp256k1` curve (1.3.132.0.10)
-  Asn1OidEcPublicKey* = [
-    0x2A'u8, 0x86'u8, 0x48'u8, 0xCE'u8, 0x3D'u8, 0x02'u8, 0x01'u8
-  ]
+  Asn1OidEcPublicKey* = [0x2A'u8, 0x86'u8, 0x48'u8, 0xCE'u8, 0x3D'u8, 0x02'u8, 0x01'u8]
     ## Encoded OID for Elliptic Curve Public Key (1.2.840.10045.2.1)
-  Asn1OidRsaEncryption* = [
-    0x2A'u8, 0x86'u8, 0x48'u8, 0x86'u8, 0xF7'u8, 0x0D'u8, 0x01'u8,
-    0x01'u8, 0x01'u8
-  ]
+  Asn1OidRsaEncryption* =
+    [0x2A'u8, 0x86'u8, 0x48'u8, 0x86'u8, 0xF7'u8, 0x0D'u8, 0x01'u8, 0x01'u8, 0x01'u8]
     ## Encoded OID for RSA Encryption (1.2.840.113549.1.1.1)
-  Asn1True* = [0x01'u8, 0x01'u8, 0xFF'u8]
-    ## Encoded boolean ``TRUE``.
-  Asn1False* = [0x01'u8, 0x01'u8, 0x00'u8]
-    ## Encoded boolean ``FALSE``.
-  Asn1Null* = [0x05'u8, 0x00'u8]
-    ## Encoded ``NULL`` value.
+  Asn1True* = [0x01'u8, 0x01'u8, 0xFF'u8] ## Encoded boolean ``TRUE``.
+  Asn1False* = [0x01'u8, 0x01'u8, 0x00'u8] ## Encoded boolean ``FALSE``.
+  Asn1Null* = [0x05'u8, 0x00'u8] ## Encoded ``NULL`` value.
 
 template toOpenArray*(ab: Asn1Buffer): untyped =
   toOpenArray(ab.buffer, ab.offset, ab.buffer.high)
@@ -119,10 +102,10 @@ template toOpenArray*(af: Asn1Field): untyped =
 template isEmpty*(ab: Asn1Buffer): bool =
   ab.offset >= len(ab.buffer)
 
-template isEnough*(ab: Asn1Buffer, length: int): bool =
+template isEnough*(ab: Asn1Buffer, length: int64): bool =
   len(ab.buffer) >= ab.offset + length
 
-proc len*[T: Asn1Buffer|Asn1Composite](abc: T): int {.inline.} =
+proc len*[T: Asn1Buffer | Asn1Composite](abc: T): int {.inline.} =
   len(abc.buffer) - abc.offset
 
 proc len*(field: Asn1Field): int {.inline.} =
@@ -131,31 +114,22 @@ proc len*(field: Asn1Field): int {.inline.} =
 template getPtr*(field: untyped): pointer =
   cast[pointer](unsafeAddr field.buffer[field.offset])
 
-proc extend*[T: Asn1Buffer|Asn1Composite](abc: var T, length: int) {.inline.} =
+proc extend*[T: Asn1Buffer | Asn1Composite](abc: var T, length: int) {.inline.} =
   ## Extend buffer or composite's internal buffer by ``length`` octets.
   abc.buffer.setLen(len(abc.buffer) + length)
 
 proc code*(tag: Asn1Tag): byte {.inline.} =
   ## Converts Nim ``tag`` enum to ASN.1 tag code.
-  case tag:
-  of Asn1Tag.NoSupport:
-    0x00'u8
-  of Asn1Tag.Boolean:
-    0x01'u8
-  of Asn1Tag.Integer:
-    0x02'u8
-  of Asn1Tag.BitString:
-    0x03'u8
-  of Asn1Tag.OctetString:
-    0x04'u8
-  of Asn1Tag.Null:
-    0x05'u8
-  of Asn1Tag.Oid:
-    0x06'u8
-  of Asn1Tag.Sequence:
-    0x30'u8
-  of Asn1Tag.Context:
-    0xA0'u8
+  case tag
+  of Asn1Tag.NoSupport: 0x00'u8
+  of Asn1Tag.Boolean: 0x01'u8
+  of Asn1Tag.Integer: 0x02'u8
+  of Asn1Tag.BitString: 0x03'u8
+  of Asn1Tag.OctetString: 0x04'u8
+  of Asn1Tag.Null: 0x05'u8
+  of Asn1Tag.Oid: 0x06'u8
+  of Asn1Tag.Sequence: 0x30'u8
+  of Asn1Tag.Context: 0xA0'u8
 
 proc asn1EncodeLength*(dest: var openArray[byte], length: uint64): int =
   ## Encode ASN.1 DER length part of TLV triple and return number of bytes
@@ -184,8 +158,7 @@ proc asn1EncodeLength*(dest: var openArray[byte], length: uint64): int =
     # then 9, so it is safe to convert it to `int`.
     int(res)
 
-proc asn1EncodeInteger*(dest: var openArray[byte],
-                        value: openArray[byte]): int =
+proc asn1EncodeInteger*(dest: var openArray[byte], value: openArray[byte]): int =
   ## Encode big-endian binary representation of integer as ASN.1 DER `INTEGER`
   ## and return number of bytes (octets) used.
   ##
@@ -195,17 +168,16 @@ proc asn1EncodeInteger*(dest: var openArray[byte],
   var buffer: array[16, byte]
   var lenlen = 0
 
-  let offset =
-    block:
-      var o = 0
-      for i in 0 ..< len(value):
-        if value[o] != 0x00:
-          break
-        inc(o)
-      if o < len(value):
-        o
-      else:
-        o - 1
+  let offset = block:
+    var o = 0
+    for i in 0 ..< len(value):
+      if value[o] != 0x00:
+        break
+      inc(o)
+    if o < len(value):
+      o
+    else:
+      o - 1
 
   let destlen =
     if len(value) > 0:
@@ -227,12 +199,10 @@ proc asn1EncodeInteger*(dest: var openArray[byte],
       if value[offset] >= 0x80'u8:
         dest[1 + lenlen] = 0x00'u8
         shift = 2
-      copyMem(addr dest[shift + lenlen], unsafeAddr value[offset],
-              len(value) - offset)
+      copyMem(addr dest[shift + lenlen], unsafeAddr value[offset], len(value) - offset)
   destlen
 
-proc asn1EncodeInteger*[T: SomeUnsignedInt](dest: var openArray[byte],
-                                            value: T): int =
+proc asn1EncodeInteger*[T: SomeUnsignedInt](dest: var openArray[byte], value: T): int =
   ## Encode Nim's unsigned integer as ASN.1 DER `INTEGER` and return number of
   ## bytes (octets) used.
   ##
@@ -267,8 +237,7 @@ proc asn1EncodeNull*(dest: var openArray[byte]): int =
     dest[1] = 0x00'u8
   res
 
-proc asn1EncodeOctetString*(dest: var openArray[byte],
-                            value: openArray[byte]): int =
+proc asn1EncodeOctetString*(dest: var openArray[byte], value: openArray[byte]): int =
   ## Encode array of bytes as ASN.1 DER `OCTET STRING` and return number of
   ## bytes (octets) used.
   ##
@@ -285,8 +254,9 @@ proc asn1EncodeOctetString*(dest: var openArray[byte],
       copyMem(addr dest[1 + lenlen], unsafeAddr value[0], len(value))
   res
 
-proc asn1EncodeBitString*(dest: var openArray[byte],
-                          value: openArray[byte], bits = 0): int =
+proc asn1EncodeBitString*(
+    dest: var openArray[byte], value: openArray[byte], bits = 0
+): int =
   ## Encode array of bytes as ASN.1 DER `BIT STRING` and return number of bytes
   ## (octets) used.
   ##
@@ -307,7 +277,7 @@ proc asn1EncodeBitString*(dest: var openArray[byte],
   let bytelen = (bitlen + 7) shr 3
   # Number of unused bits
   let unused = (8 - (bitlen and 7)) and 7
-  let mask = not((1'u8 shl unused) - 1'u8)
+  let mask = not ((1'u8 shl unused) - 1'u8)
   var lenlen = asn1EncodeLength(buffer, uint64(bytelen + 1))
   let res = 1 + lenlen + 1 + len(value)
   if len(dest) >= res:
@@ -321,8 +291,7 @@ proc asn1EncodeBitString*(dest: var openArray[byte],
       dest[2 + lenlen + bytelen - 1] = lastbyte and mask
   res
 
-proc asn1EncodeTag[T: SomeUnsignedInt](dest: var openArray[byte],
-                                       value: T): int =
+proc asn1EncodeTag[T: SomeUnsignedInt](dest: var openArray[byte], value: T): int =
   var v = value
   if value <= cast[T](0x7F):
     if len(dest) >= 1:
@@ -344,32 +313,6 @@ proc asn1EncodeTag[T: SomeUnsignedInt](dest: var openArray[byte],
       dest[k - 1] = dest[k - 1] and 0x7F'u8
     res
 
-proc asn1EncodeOid*(dest: var openArray[byte], value: openArray[int]): int =
-  ## Encode array of integers ``value`` as ASN.1 DER `OBJECT IDENTIFIER` and
-  ## return number of bytes (octets) used.
-  ##
-  ## If length of ``dest`` is less then number of required bytes to encode
-  ## ``value``, then result of encoding will not be stored in ``dest``
-  ## but number of bytes (octets) required will be returned.
-  var buffer: array[16, byte]
-  var res = 1
-  var oidlen = 1
-  for i in 2..<len(value):
-    oidlen += asn1EncodeTag(buffer, cast[uint64](value[i]))
-  res += asn1EncodeLength(buffer, uint64(oidlen))
-  res += oidlen
-  if len(dest) >= res:
-    let last = dest.high
-    var offset = 1
-    dest[0] = Asn1Tag.Oid.code()
-    offset += asn1EncodeLength(dest.toOpenArray(offset, last), uint64(oidlen))
-    dest[offset] = cast[byte](value[0] * 40 + value[1])
-    offset += 1
-    for i in 2..<len(value):
-      offset += asn1EncodeTag(dest.toOpenArray(offset, last),
-                              cast[uint64](value[i]))
-  res
-
 proc asn1EncodeOid*(dest: var openArray[byte], value: openArray[byte]): int =
   ## Encode array of bytes ``value`` as ASN.1 DER `OBJECT IDENTIFIER` and return
   ## number of bytes (octets) used.
@@ -389,8 +332,7 @@ proc asn1EncodeOid*(dest: var openArray[byte], value: openArray[byte]): int =
     copyMem(addr dest[1 + lenlen], unsafeAddr value[0], len(value))
   res
 
-proc asn1EncodeSequence*(dest: var openArray[byte],
-                         value: openArray[byte]): int =
+proc asn1EncodeSequence*(dest: var openArray[byte], value: openArray[byte]): int =
   ## Encode ``value`` as ASN.1 DER `SEQUENCE` and return number of bytes
   ## (octets) used.
   ##
@@ -406,8 +348,7 @@ proc asn1EncodeSequence*(dest: var openArray[byte],
     copyMem(addr dest[1 + lenlen], unsafeAddr value[0], len(value))
   res
 
-proc asn1EncodeComposite*(dest: var openArray[byte],
-                          value: Asn1Composite): int =
+proc asn1EncodeComposite*(dest: var openArray[byte], value: Asn1Composite): int =
   ## Encode composite value and return number of bytes (octets) used.
   ##
   ## If length of ``dest`` is less then number of required bytes to encode
@@ -419,12 +360,12 @@ proc asn1EncodeComposite*(dest: var openArray[byte],
   if len(dest) >= res:
     dest[0] = value.tag.code()
     copyMem(addr dest[1], addr buffer[0], lenlen)
-    copyMem(addr dest[1 + lenlen], unsafeAddr value.buffer[0],
-            len(value.buffer))
+    copyMem(addr dest[1 + lenlen], unsafeAddr value.buffer[0], len(value.buffer))
   res
 
-proc asn1EncodeContextTag*(dest: var openArray[byte], value: openArray[byte],
-                           tag: int): int =
+proc asn1EncodeContextTag*(
+    dest: var openArray[byte], value: openArray[byte], tag: int
+): int =
   ## Encode ASN.1 DER `CONTEXT SPECIFIC TAG` ``tag`` for value ``value`` and
   ## return number of bytes (octets) used.
   ##
@@ -443,26 +384,29 @@ proc asn1EncodeContextTag*(dest: var openArray[byte], value: openArray[byte],
     copyMem(addr dest[1 + lenlen], unsafeAddr value[0], len(value))
   res
 
-proc getLength(ab: var Asn1Buffer): Asn1Result[uint64] =
+proc getLength(ab: var Asn1Buffer): Asn1Result[int] =
   ## Decode length part of ASN.1 TLV triplet.
   if not ab.isEmpty():
     let b = ab.buffer[ab.offset]
     if (b and 0x80'u8) == 0x00'u8:
-      let length = cast[uint64](b)
+      let length = safeConvert[int](b)
       ab.offset += 1
       return ok(length)
     if b == 0x80'u8:
       return err(Asn1Error.Indefinite)
     if b == 0xFF'u8:
       return err(Asn1Error.Incorrect)
-    let octets = cast[uint64](b and 0x7F'u8)
-    if octets > 8'u64:
+    let octets = safeConvert[int](b and 0x7F'u8)
+    if octets > 8:
       return err(Asn1Error.Overflow)
-    if ab.isEnough(int(octets)):
-      var length: uint64 = 0
-      for i in 0..<int(octets):
-        length = (length shl 8) or cast[uint64](ab.buffer[ab.offset + i + 1])
-      ab.offset = ab.offset + int(octets) + 1
+    if ab.isEnough(octets):
+      var lengthU: uint64 = 0
+      for i in 0 ..< octets:
+        lengthU = (lengthU shl 8) or safeConvert[uint64](ab.buffer[ab.offset + i + 1])
+      if lengthU > uint64(int64.high):
+        return err(Asn1Error.Overflow)
+      let length = int(lengthU)
+      ab.offset = ab.offset + octets + 1
       return ok(length)
     else:
       return err(Asn1Error.Incomplete)
@@ -474,8 +418,8 @@ proc getTag(ab: var Asn1Buffer, tag: var int): Asn1Result[Asn1Class] =
   if not ab.isEmpty():
     let
       b = ab.buffer[ab.offset]
-      c = int((b and 0xC0'u8) shr 6)
-    tag = int(b and 0x3F)
+      c = safeConvert[int]((b and 0xC0'u8) shr 6)
+    tag = safeConvert[int](b and 0x3F)
     ab.offset += 1
     if c >= 0 and c < 4:
       ok(cast[Asn1Class](c))
@@ -489,14 +433,14 @@ proc read*(ab: var Asn1Buffer): Asn1Result[Asn1Field] =
   var
     field: Asn1Field
     tag, ttag, offset: int
-    length, tlength: uint64
+    length, tlength: int
     aclass: Asn1Class
     inclass: bool
 
   inclass = false
   while true:
     offset = ab.offset
-    aclass = ? ab.getTag(tag)
+    aclass = ?ab.getTag(tag)
 
     case aclass
     of Asn1Class.ContextSpecific:
@@ -505,9 +449,9 @@ proc read*(ab: var Asn1Buffer): Asn1Result[Asn1Field] =
       else:
         inclass = true
         ttag = tag
-        tlength = ? ab.getLength()
+        tlength = ?ab.getLength()
     of Asn1Class.Universal:
-      length = ? ab.getLength()
+      length = ?ab.getLength()
 
       if inclass:
         if length >= tlength:
@@ -519,31 +463,35 @@ proc read*(ab: var Asn1Buffer): Asn1Result[Asn1Field] =
         if length != 1:
           return err(Asn1Error.Incorrect)
 
-        if not ab.isEnough(int(length)):
+        if not ab.isEnough(length):
           return err(Asn1Error.Incomplete)
 
         let b = ab.buffer[ab.offset]
         if b != 0xFF'u8 and b != 0x00'u8:
-           return err(Asn1Error.Incorrect)
+          return err(Asn1Error.Incorrect)
 
-        field = Asn1Field(kind: Asn1Tag.Boolean, klass: aclass,
-                          index: ttag, offset: int(ab.offset),
-                          length: 1, buffer: ab.buffer)
+        field = Asn1Field(
+          kind: Asn1Tag.Boolean,
+          klass: aclass,
+          index: ttag,
+          offset: ab.offset,
+          length: 1,
+          buffer: ab.buffer,
+        )
         field.vbool = (b == 0xFF'u8)
         ab.offset += 1
         return ok(field)
-
       of Asn1Tag.Integer.code():
         # INTEGER
         if length == 0:
           return err(Asn1Error.Incorrect)
 
-        if not ab.isEnough(int(length)):
-         return err(Asn1Error.Incomplete)
+        if not ab.isEnough(length):
+          return err(Asn1Error.Incomplete)
 
         # Count number of leading zeroes
         var zc = 0
-        while (zc < int(length)) and (ab.buffer[ab.offset + zc] == 0x00'u8):
+        while (zc < length) and (ab.buffer[ab.offset + zc] == 0x00'u8):
           inc(zc)
 
         if zc > 1:
@@ -551,68 +499,87 @@ proc read*(ab: var Asn1Buffer): Asn1Result[Asn1Field] =
 
         if zc == 0:
           # Negative or Positive integer
-          field = Asn1Field(kind: Asn1Tag.Integer, klass: aclass,
-                            index: ttag, offset: int(ab.offset),
-                            length: int(length), buffer: ab.buffer)
+          field = Asn1Field(
+            kind: Asn1Tag.Integer,
+            klass: aclass,
+            index: ttag,
+            offset: ab.offset,
+            length: length,
+            buffer: ab.buffer,
+          )
           if (ab.buffer[ab.offset] and 0x80'u8) == 0x80'u8:
             # Negative integer
             if length <= 8:
               # We need this transformation because our field.vint is uint64.
               for i in 0 ..< 8:
-                if i < 8 - int(length):
+                if i < 8 - length:
                   field.vint = (field.vint shl 8) or 0xFF'u64
                 else:
-                  let offset = ab.offset + i - (8 - int(length))
-                  field.vint = (field.vint shl 8) or uint64(ab.buffer[offset])
+                  let offset = ab.offset + i - (8 - length)
+                  field.vint =
+                    (field.vint shl 8) or safeConvert[uint64](ab.buffer[offset])
           else:
             # Positive integer
             if length <= 8:
-              for i in 0 ..< int(length):
-                field.vint = (field.vint shl 8) or
-                              uint64(ab.buffer[ab.offset + i])
-          ab.offset += int(length)
+              for i in 0 ..< length:
+                field.vint =
+                  (field.vint shl 8) or safeConvert[uint64](ab.buffer[ab.offset + i])
+          ab.offset += length
           return ok(field)
         else:
           if length == 1:
             # Zero value integer
-            field = Asn1Field(kind: Asn1Tag.Integer, klass: aclass,
-                              index: ttag, offset: int(ab.offset),
-                              length: int(length), vint: 0'u64,
-                              buffer: ab.buffer)
-            ab.offset += int(length)
+            field = Asn1Field(
+              kind: Asn1Tag.Integer,
+              klass: aclass,
+              index: ttag,
+              offset: ab.offset,
+              length: length,
+              vint: 0'u64,
+              buffer: ab.buffer,
+            )
+            ab.offset += length
             return ok(field)
           else:
             # Positive integer with leading zero
-            field = Asn1Field(kind: Asn1Tag.Integer, klass: aclass,
-                              index: ttag, offset: int(ab.offset) + 1,
-                              length: int(length) - 1, buffer: ab.buffer)
+            field = Asn1Field(
+              kind: Asn1Tag.Integer,
+              klass: aclass,
+              index: ttag,
+              offset: ab.offset + 1,
+              length: length - 1,
+              buffer: ab.buffer,
+            )
             if length <= 9:
-              for i in 1 ..< int(length):
-                field.vint = (field.vint shl 8) or
-                              uint64(ab.buffer[ab.offset + i])
-            ab.offset += int(length)
+              for i in 1 ..< length:
+                field.vint =
+                  (field.vint shl 8) or safeConvert[uint64](ab.buffer[ab.offset + i])
+            ab.offset += length
             return ok(field)
-
       of Asn1Tag.BitString.code():
         # BIT STRING
         if length == 0:
           # BIT STRING should include `unused` bits field, so length should be
           # bigger then 1.
           return err(Asn1Error.Incorrect)
-
         elif length == 1:
           if ab.buffer[ab.offset] != 0x00'u8:
             return err(Asn1Error.Incorrect)
           else:
             # Zero-length BIT STRING.
-            field = Asn1Field(kind: Asn1Tag.BitString, klass: aclass,
-                              index: ttag, offset: int(ab.offset + 1),
-                              length: 0, ubits: 0, buffer: ab.buffer)
-            ab.offset += int(length)
+            field = Asn1Field(
+              kind: Asn1Tag.BitString,
+              klass: aclass,
+              index: ttag,
+              offset: ab.offset + 1,
+              length: 0,
+              ubits: 0,
+              buffer: ab.buffer,
+            )
+            ab.offset += length
             return ok(field)
-
         else:
-          if not ab.isEnough(int(length)):
+          if not ab.isEnough(length):
             return err(Asn1Error.Incomplete)
 
           let unused = ab.buffer[ab.offset]
@@ -620,61 +587,82 @@ proc read*(ab: var Asn1Buffer): Asn1Result[Asn1Field] =
             # Number of unused bits should not be bigger then `7`.
             return err(Asn1Error.Incorrect)
 
-          let mask = (1'u8 shl int(unused)) - 1'u8
-          if (ab.buffer[ab.offset + int(length) - 1] and mask) != 0x00'u8:
+          let mask = (1'u8 shl safeConvert[int](unused)) - 1'u8
+          if (ab.buffer[ab.offset + length - 1] and mask) != 0x00'u8:
             ## All unused bits should be set to `0`.
             return err(Asn1Error.Incorrect)
 
-          field = Asn1Field(kind: Asn1Tag.BitString, klass: aclass,
-                            index: ttag, offset: int(ab.offset + 1),
-                            length: int(length - 1), ubits: int(unused),
-                            buffer: ab.buffer)
-          ab.offset += int(length)
+          field = Asn1Field(
+            kind: Asn1Tag.BitString,
+            klass: aclass,
+            index: ttag,
+            offset: ab.offset + 1,
+            length: length - 1,
+            ubits: safeConvert[int](unused),
+            buffer: ab.buffer,
+          )
+          ab.offset += length
           return ok(field)
-
       of Asn1Tag.OctetString.code():
         # OCTET STRING
-        if not ab.isEnough(int(length)):
+        if not ab.isEnough(length):
           return err(Asn1Error.Incomplete)
 
-        field = Asn1Field(kind: Asn1Tag.OctetString, klass: aclass,
-                          index: ttag, offset: int(ab.offset),
-                          length: int(length), buffer: ab.buffer)
-        ab.offset += int(length)
+        field = Asn1Field(
+          kind: Asn1Tag.OctetString,
+          klass: aclass,
+          index: ttag,
+          offset: ab.offset,
+          length: length,
+          buffer: ab.buffer,
+        )
+        ab.offset += length
         return ok(field)
-
       of Asn1Tag.Null.code():
         # NULL
         if length != 0:
           return err(Asn1Error.Incorrect)
 
-        field = Asn1Field(kind: Asn1Tag.Null, klass: aclass, index: ttag,
-                          offset: int(ab.offset), length: 0, buffer: ab.buffer)
-        ab.offset += int(length)
+        field = Asn1Field(
+          kind: Asn1Tag.Null,
+          klass: aclass,
+          index: ttag,
+          offset: ab.offset,
+          length: 0,
+          buffer: ab.buffer,
+        )
+        ab.offset += length
         return ok(field)
-
       of Asn1Tag.Oid.code():
         # OID
-        if not ab.isEnough(int(length)):
+        if not ab.isEnough(length):
           return err(Asn1Error.Incomplete)
 
-        field = Asn1Field(kind: Asn1Tag.Oid, klass: aclass,
-                          index: ttag, offset: int(ab.offset),
-                          length: int(length), buffer: ab.buffer)
-        ab.offset += int(length)
+        field = Asn1Field(
+          kind: Asn1Tag.Oid,
+          klass: aclass,
+          index: ttag,
+          offset: ab.offset,
+          length: length,
+          buffer: ab.buffer,
+        )
+        ab.offset += length
         return ok(field)
-
       of Asn1Tag.Sequence.code():
         # SEQUENCE
-        if not ab.isEnough(int(length)):
+        if not ab.isEnough(length):
           return err(Asn1Error.Incomplete)
 
-        field = Asn1Field(kind: Asn1Tag.Sequence, klass: aclass,
-                          index: ttag, offset: int(ab.offset),
-                          length: int(length), buffer: ab.buffer)
-        ab.offset += int(length)
+        field = Asn1Field(
+          kind: Asn1Tag.Sequence,
+          klass: aclass,
+          index: ttag,
+          offset: ab.offset,
+          length: length,
+          buffer: ab.buffer,
+        )
+        ab.offset += length
         return ok(field)
-
       else:
         return err(Asn1Error.NoSupport)
 
@@ -697,9 +685,9 @@ proc `==`*(field: Asn1Field, data: openArray[byte]): bool =
     if length > 0:
       if field.length == len(data):
         CT.isEqual(
-          field.buffer.toOpenArray(field.offset,
-                                   field.offset + field.length - 1),
-          data.toOpenArray(0, field.length - 1))
+          field.buffer.toOpenArray(field.offset, field.offset + field.length - 1),
+          data.toOpenArray(0, field.length - 1),
+        )
       else:
         false
     else:
@@ -777,13 +765,14 @@ proc `$`*(field: Asn1Field): string =
     res.add(ncrutils.toHex(field.toOpenArray()))
     res
 
-proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, tag: Asn1Tag) =
+proc write*[T: Asn1Buffer | Asn1Composite](abc: var T, tag: Asn1Tag) =
   ## Write empty value to buffer or composite with ``tag``.
   ##
   ## This procedure must be used to write `NULL`, `0` or empty `BIT STRING`,
   ## `OCTET STRING` types.
-  doAssert(tag in {Asn1Tag.Null, Asn1Tag.Integer, Asn1Tag.BitString,
-                   Asn1Tag.OctetString})
+  doAssert(
+    tag in {Asn1Tag.Null, Asn1Tag.Integer, Asn1Tag.BitString, Asn1Tag.OctetString}
+  )
   var length: int
   if tag == Asn1Tag.Null:
     length = asn1EncodeNull(abc.toOpenArray())
@@ -805,22 +794,23 @@ proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, tag: Asn1Tag) =
     discard asn1EncodeOctetString(abc.toOpenArray(), tmp.toOpenArray(0, -1))
   abc.offset += length
 
-proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, value: uint64) =
+proc write*[T: Asn1Buffer | Asn1Composite](abc: var T, value: uint64) =
   ## Write uint64 ``value`` to buffer or composite as ASN.1 `INTEGER`.
   let length = asn1EncodeInteger(abc.toOpenArray(), value)
   abc.extend(length)
   discard asn1EncodeInteger(abc.toOpenArray(), value)
   abc.offset += length
 
-proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, value: bool) =
+proc write*[T: Asn1Buffer | Asn1Composite](abc: var T, value: bool) =
   ## Write bool ``value`` to buffer or composite as ASN.1 `BOOLEAN`.
   let length = asn1EncodeBoolean(abc.toOpenArray(), value)
   abc.extend(length)
   discard asn1EncodeBoolean(abc.toOpenArray(), value)
   abc.offset += length
 
-proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, tag: Asn1Tag,
-                                         value: openArray[byte], bits = 0) =
+proc write*[T: Asn1Buffer | Asn1Composite](
+    abc: var T, tag: Asn1Tag, value: openArray[byte], bits = 0
+) =
   ## Write array ``value`` using ``tag``.
   ##
   ## This procedure is used to write ASN.1 `INTEGER`, `OCTET STRING`,
@@ -828,8 +818,9 @@ proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, tag: Asn1Tag,
   ##
   ## For `BIT STRING` you can use ``bits`` argument to specify number of used
   ## bits.
-  doAssert(tag in {Asn1Tag.Integer, Asn1Tag.OctetString, Asn1Tag.BitString,
-                 Asn1Tag.Oid})
+  doAssert(
+    tag in {Asn1Tag.Integer, Asn1Tag.OctetString, Asn1Tag.BitString, Asn1Tag.Oid}
+  )
   var length: int
   if tag == Asn1Tag.Integer:
     length = asn1EncodeInteger(abc.toOpenArray(), value)
@@ -849,7 +840,7 @@ proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, tag: Asn1Tag,
     discard asn1EncodeOid(abc.toOpenArray(), value)
   abc.offset += length
 
-proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, value: Asn1Composite) =
+proc write*[T: Asn1Buffer | Asn1Composite](abc: var T, value: Asn1Composite) =
   doAssert(len(value) > 0, "Composite value not finished")
   var length: int
   if value.tag == Asn1Tag.Sequence:
@@ -866,6 +857,6 @@ proc write*[T: Asn1Buffer|Asn1Composite](abc: var T, value: Asn1Composite) =
     discard asn1EncodeContextTag(abc.toOpenArray(), value.buffer, value.idx)
   abc.offset += length
 
-proc finish*[T: Asn1Buffer|Asn1Composite](abc: var T) {.inline.} =
+proc finish*[T: Asn1Buffer | Asn1Composite](abc: var T) {.inline.} =
   ## Finishes buffer or composite and prepares it for writing.
   abc.offset = 0

libp2p/crypto/rsa.nim

@@ -13,10 +13,7 @@
 ## BearSSL library <https://bearssl.org/>
 ## Copyright(C) 2018 Thomas Pornin <pornin@bolet.org>.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import bearssl/[rsa, rand, hash]
 import minasn1
@@ -33,32 +30,17 @@ const
   MinKeySize* = 2048
     ## Minimal allowed RSA key size in bits.
     ## https://github.com/libp2p/go-libp2p-core/blob/master/crypto/rsa_common.go#L13
-  DefaultKeySize* = 3072
-    ## Default RSA key size in bits.
+  DefaultKeySize* = 3072 ## Default RSA key size in bits.
 
-  RsaOidSha1* = [
-    byte 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A
-  ]
+  RsaOidSha1* = [byte 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A]
     ## RSA PKCS#1.5 SHA-1 hash object identifier.
-  RsaOidSha224* = [
-    byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04,
-    0x02, 0x04
-  ]
+  RsaOidSha224* = [byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04]
     ## RSA PKCS#1.5 SHA-224 hash object identifier.
-  RsaOidSha256* = [
-    byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04,
-    0x02, 0x01
-  ]
+  RsaOidSha256* = [byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01]
     ## RSA PKCS#1.5 SHA-256 hash object identifier.
-  RsaOidSha384* = [
-    byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04,
-    0x02, 0x02
-  ]
+  RsaOidSha384* = [byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02]
     ## RSA PKCS#1.5 SHA-384 hash object identifier.
-  RsaOidSha512* = [
-    byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04,
-    0x02, 0x03
-  ]
+  RsaOidSha512* = [byte 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03]
     ## RSA PKCS#1.5 SHA-512 hash object identifier.
 
 type
@@ -82,9 +64,9 @@ type
   RsaKP* = RsaPrivateKey | RsaKeyPair
 
   RsaError* = enum
-    RsaGenError,
-    RsaKeyIncorrectError,
-    RsaSignatureError,
+    RsaGenError
+    RsaKeyIncorrectError
+    RsaSignatureError
     RsaLowSecurityError
 
   RsaResult*[T] = Result[T, RsaError]
@@ -112,15 +94,18 @@ template getArray*(bs, os, ls: untyped): untyped =
 
 template trimZeroes(b: seq[byte], pt, ptlen: untyped) =
   var length = ptlen
-  for i in 0..<length:
+  for i in 0 ..< length:
     if pt[] != byte(0x00):
       break
     pt = cast[ptr byte](cast[uint](pt) + 1)
     ptlen -= 1
 
-proc random*[T: RsaKP](t: typedesc[T], rng: var HmacDrbgContext,
-                       bits = DefaultKeySize,
-                       pubexp = DefaultPublicExponent): RsaResult[T] =
+proc random*[T: RsaKP](
+    t: typedesc[T],
+    rng: var HmacDrbgContext,
+    bits = DefaultKeySize,
+    pubexp = DefaultPublicExponent,
+): RsaResult[T] =
   ## Generate new random RSA private key using BearSSL's HMAC-SHA256-DRBG
   ## algorithm.
   ##
@@ -142,10 +127,15 @@ proc random*[T: RsaKP](t: typedesc[T], rng: var HmacDrbgContext,
 
   var keygen = rsaKeygenGetDefault()
 
-  if keygen(addr rng.vtable,
-            addr res.seck, addr res.buffer[sko],
-            addr res.pubk, addr res.buffer[pko],
-            cuint(bits), pubexp) == 0:
+  if keygen(
+    addr rng.vtable,
+    addr res.seck,
+    addr res.buffer[sko],
+    addr res.pubk,
+    addr res.buffer[pko],
+    cuint(bits),
+    pubexp,
+  ) == 0:
     return err(RsaGenError)
 
   let
@@ -173,9 +163,10 @@ proc copy*[T: RsaPKI](key: T): T =
   doAssert(not isNil(key))
   when T is RsaPrivateKey:
     if len(key.buffer) > 0:
-      let length = key.seck.plen.uint + key.seck.qlen.uint + key.seck.dplen.uint +
-                   key.seck.dqlen.uint + key.seck.iqlen.uint + key.pubk.nlen.uint +
-                   key.pubk.elen.uint + key.pexplen.uint
+      let length =
+        key.seck.plen.uint + key.seck.qlen.uint + key.seck.dplen.uint +
+        key.seck.dqlen.uint + key.seck.iqlen.uint + key.pubk.nlen.uint +
+        key.pubk.elen.uint + key.pexplen.uint
       result = new RsaPrivateKey
       result.buffer = newSeq[byte](length)
       let po: uint = 0
@@ -238,8 +229,7 @@ proc getPublicKey*(key: RsaPrivateKey): RsaPublicKey =
   result.key.n = addr result.buffer[0]
   result.key.e = addr result.buffer[key.pubk.nlen]
   copyMem(addr result.buffer[0], cast[pointer](key.pubk.n), key.pubk.nlen)
-  copyMem(addr result.buffer[key.pubk.nlen], cast[pointer](key.pubk.e),
-          key.pubk.elen)
+  copyMem(addr result.buffer[key.pubk.nlen], cast[pointer](key.pubk.e), key.pubk.elen)
   result.key.nlen = key.pubk.nlen
   result.key.elen = key.pubk.elen
 
@@ -251,7 +241,7 @@ proc pubkey*(pair: RsaKeyPair): RsaPublicKey {.inline.} =
   ## Get RSA public key from pair ``pair``.
   result = cast[RsaPrivateKey](pair).getPublicKey()
 
-proc clear*[T: RsaPKI|RsaKeyPair](pki: var T) =
+proc clear*[T: RsaPKI | RsaKeyPair](pki: var T) =
   ## Wipe and clear EC private key, public key or scalar object.
   doAssert(not isNil(pki))
   when T is RsaPrivateKey:
@@ -295,21 +285,14 @@ proc toBytes*(key: RsaPrivateKey, data: var openArray[byte]): RsaResult[int] =
     var b = Asn1Buffer.init()
     var p = Asn1Composite.init(Asn1Tag.Sequence)
     p.write(0'u64)
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.pubk.n,
-                                      key.pubk.nlen))
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.pubk.e,
-                                      key.pubk.elen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.pubk.n, key.pubk.nlen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.pubk.e, key.pubk.elen))
     p.write(Asn1Tag.Integer, getArray(key.buffer, key.pexp, key.pexplen))
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.p,
-                                      key.seck.plen))
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.q,
-                                      key.seck.qlen))
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.dp,
-                                      key.seck.dplen))
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.dq,
-                                      key.seck.dqlen))
-    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.iq,
-                                      key.seck.iqlen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.p, key.seck.plen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.q, key.seck.qlen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.dp, key.seck.dplen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.dq, key.seck.dqlen))
+    p.write(Asn1Tag.Integer, getArray(key.buffer, key.seck.iq, key.seck.iqlen))
     p.finish()
     b.write(p)
     b.finish()
@@ -374,7 +357,7 @@ proc getBytes*(key: RsaPrivateKey): RsaResult[seq[byte]] =
   if isNil(key):
     return err(RsaKeyIncorrectError)
   var res = newSeq[byte](4096)
-  let length = ? key.toBytes(res)
+  let length = ?key.toBytes(res)
   if length > 0:
     res.setLen(length)
     ok(res)
@@ -387,7 +370,7 @@ proc getBytes*(key: RsaPublicKey): RsaResult[seq[byte]] =
   if isNil(key):
     return err(RsaKeyIncorrectError)
   var res = newSeq[byte](4096)
-  let length = ? key.toBytes(res)
+  let length = ?key.toBytes(res)
   if length > 0:
     res.setLen(length)
     ok(res)
@@ -399,7 +382,7 @@ proc getBytes*(sig: RsaSignature): RsaResult[seq[byte]] =
   if isNil(sig):
     return err(RsaSignatureError)
   var res = newSeq[byte](4096)
-  let length = ? sig.toBytes(res)
+  let length = ?sig.toBytes(res)
   if length > 0:
     res.setLen(length)
     ok(res)
@@ -411,20 +394,19 @@ proc init*(key: var RsaPrivateKey, data: openArray[byte]): Result[void, Asn1Erro
   ## ``data``.
   ##
   ## Procedure returns ``Asn1Status``.
-  var
-    field, rawn, rawpube, rawprie, rawp, rawq, rawdp, rawdq, rawiq: Asn1Field
+  var field, rawn, rawpube, rawprie, rawp, rawq, rawdp, rawdq, rawiq: Asn1Field
 
   # Asn1Field is not trivial so avoid too much Result
 
   var ab = Asn1Buffer.init(data)
-  field = ? ab.read()
+  field = ?ab.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var ib = field.getBuffer()
 
-  field = ? ib.read()
+  field = ?ib.read()
 
   if field.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
@@ -432,48 +414,48 @@ proc init*(key: var RsaPrivateKey, data: openArray[byte]): Result[void, Asn1Erro
   if field.vint != 0'u64:
     return err(Asn1Error.Incorrect)
 
-  rawn = ? ib.read()
+  rawn = ?ib.read()
 
   if rawn.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawpube = ? ib.read()
+  rawpube = ?ib.read()
 
   if rawpube.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawprie = ? ib.read()
+  rawprie = ?ib.read()
 
   if rawprie.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawp = ? ib.read()
+  rawp = ?ib.read()
 
   if rawp.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawq = ? ib.read()
+  rawq = ?ib.read()
 
   if rawq.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawdp = ? ib.read()
+  rawdp = ?ib.read()
 
   if rawdp.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawdq = ? ib.read()
+  rawdq = ?ib.read()
 
   if rawdq.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawiq = ? ib.read()
+  rawiq = ?ib.read()
 
   if rawiq.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
   if len(rawn) >= (MinKeySize shr 3) and len(rawp) > 0 and len(rawq) > 0 and
-     len(rawdp) > 0 and len(rawdq) > 0 and len(rawiq) > 0:
+      len(rawdp) > 0 and len(rawdq) > 0 and len(rawiq) > 0:
     key = new RsaPrivateKey
     key.buffer = @data
     key.pubk.n = addr key.buffer[rawn.offset]
@@ -505,52 +487,52 @@ proc init*(key: var RsaPublicKey, data: openArray[byte]): Result[void, Asn1Error
   var field, rawn, rawe: Asn1Field
   var ab = Asn1Buffer.init(data)
 
-  field = ? ab.read()
+  field = ?ab.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var ib = field.getBuffer()
 
-  field = ? ib.read()
+  field = ?ib.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var ob = field.getBuffer()
 
-  field = ? ob.read()
+  field = ?ob.read()
 
   if field.kind != Asn1Tag.Oid:
     return err(Asn1Error.Incorrect)
   elif field != Asn1OidRsaEncryption:
     return err(Asn1Error.Incorrect)
 
-  field = ? ob.read()
+  field = ?ob.read()
 
   if field.kind != Asn1Tag.Null:
     return err(Asn1Error.Incorrect)
 
-  field = ? ib.read()
+  field = ?ib.read()
 
   if field.kind != Asn1Tag.BitString:
     return err(Asn1Error.Incorrect)
 
   var vb = field.getBuffer()
 
-  field = ? vb.read()
+  field = ?vb.read()
 
   if field.kind != Asn1Tag.Sequence:
     return err(Asn1Error.Incorrect)
 
   var sb = field.getBuffer()
 
-  rawn = ? sb.read()
+  rawn = ?sb.read()
 
   if rawn.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
 
-  rawe = ? sb.read()
+  rawe = ?sb.read()
 
   if rawe.kind != Asn1Tag.Integer:
     return err(Asn1Error.Incorrect)
@@ -578,16 +560,16 @@ proc init*(sig: var RsaSignature, data: openArray[byte]): Result[void, Asn1Error
   else:
     err(Asn1Error.Incorrect)
 
-proc init*[T: RsaPKI](sospk: var T,
-                      data: string): Result[void, Asn1Error] {.inline.} =
+proc init*[T: RsaPKI](sospk: var T, data: string): Result[void, Asn1Error] {.inline.} =
   ## Initialize EC `private key`, `public key` or `scalar` ``sospk`` from
   ## hexadecimal string representation ``data``.
   ##
   ## Procedure returns ``Result[void, Asn1Status]``.
   sospk.init(ncrutils.fromHex(data))
 
-proc init*(t: typedesc[RsaPrivateKey],
-           data: openArray[byte]): RsaResult[RsaPrivateKey] =
+proc init*(
+    t: typedesc[RsaPrivateKey], data: openArray[byte]
+): RsaResult[RsaPrivateKey] =
   ## Initialize RSA private key from ASN.1 DER binary representation ``data``
   ## and return constructed object.
   var res: RsaPrivateKey
@@ -596,8 +578,7 @@ proc init*(t: typedesc[RsaPrivateKey],
   else:
     ok(res)
 
-proc init*(t: typedesc[RsaPublicKey],
-           data: openArray[byte]): RsaResult[RsaPublicKey] =
+proc init*(t: typedesc[RsaPublicKey], data: openArray[byte]): RsaResult[RsaPublicKey] =
   ## Initialize RSA public key from ASN.1 DER binary representation ``data``
   ## and return constructed object.
   var res: RsaPublicKey
@@ -606,8 +587,7 @@ proc init*(t: typedesc[RsaPublicKey],
   else:
     ok(res)
 
-proc init*(t: typedesc[RsaSignature],
-           data: openArray[byte]): RsaResult[RsaSignature] =
+proc init*(t: typedesc[RsaSignature], data: openArray[byte]): RsaResult[RsaSignature] =
   ## Initialize RSA signature from raw binary representation ``data`` and
   ## return constructed object.
   var res: RsaSignature
@@ -634,14 +614,11 @@ proc `$`*(key: RsaPrivateKey): string =
     result.add("\nq   = ")
     result.add(ncrutils.toHex(getArray(key.buffer, key.seck.q, key.seck.qlen)))
     result.add("\ndp  = ")
-    result.add(ncrutils.toHex(getArray(key.buffer, key.seck.dp,
-                                       key.seck.dplen)))
+    result.add(ncrutils.toHex(getArray(key.buffer, key.seck.dp, key.seck.dplen)))
     result.add("\ndq  = ")
-    result.add(ncrutils.toHex(getArray(key.buffer, key.seck.dq,
-                                       key.seck.dqlen)))
+    result.add(ncrutils.toHex(getArray(key.buffer, key.seck.dq, key.seck.dqlen)))
     result.add("\niq  = ")
-    result.add(ncrutils.toHex(getArray(key.buffer, key.seck.iq,
-                                       key.seck.iqlen)))
+    result.add(ncrutils.toHex(getArray(key.buffer, key.seck.iq, key.seck.iqlen)))
     result.add("\npre = ")
     result.add(ncrutils.toHex(getArray(key.buffer, key.pexp, key.pexplen)))
     result.add("\nm   = ")
@@ -686,23 +663,38 @@ proc `==`*(a, b: RsaPrivateKey): bool =
     false
   else:
     if a.seck.nBitlen == b.seck.nBitlen:
-      if cast[int](a.seck.nBitlen) > 0:
-        let r1 = CT.isEqual(getArray(a.buffer, a.seck.p, a.seck.plen),
-                            getArray(b.buffer, b.seck.p, b.seck.plen))
-        let r2 = CT.isEqual(getArray(a.buffer, a.seck.q, a.seck.qlen),
-                            getArray(b.buffer, b.seck.q, b.seck.qlen))
-        let r3 = CT.isEqual(getArray(a.buffer, a.seck.dp, a.seck.dplen),
-                            getArray(b.buffer, b.seck.dp, b.seck.dplen))
-        let r4 = CT.isEqual(getArray(a.buffer, a.seck.dq, a.seck.dqlen),
-                            getArray(b.buffer, b.seck.dq, b.seck.dqlen))
-        let r5 = CT.isEqual(getArray(a.buffer, a.seck.iq, a.seck.iqlen),
-                            getArray(b.buffer, b.seck.iq, b.seck.iqlen))
-        let r6 = CT.isEqual(getArray(a.buffer, a.pexp, a.pexplen),
-                            getArray(b.buffer, b.pexp, b.pexplen))
-        let r7 = CT.isEqual(getArray(a.buffer, a.pubk.n, a.pubk.nlen),
-                            getArray(b.buffer, b.pubk.n, b.pubk.nlen))
-        let r8 = CT.isEqual(getArray(a.buffer, a.pubk.e, a.pubk.elen),
-                            getArray(b.buffer, b.pubk.e, b.pubk.elen))
+      if a.seck.nBitlen > 0'u:
+        let r1 = CT.isEqual(
+          getArray(a.buffer, a.seck.p, a.seck.plen),
+          getArray(b.buffer, b.seck.p, b.seck.plen),
+        )
+        let r2 = CT.isEqual(
+          getArray(a.buffer, a.seck.q, a.seck.qlen),
+          getArray(b.buffer, b.seck.q, b.seck.qlen),
+        )
+        let r3 = CT.isEqual(
+          getArray(a.buffer, a.seck.dp, a.seck.dplen),
+          getArray(b.buffer, b.seck.dp, b.seck.dplen),
+        )
+        let r4 = CT.isEqual(
+          getArray(a.buffer, a.seck.dq, a.seck.dqlen),
+          getArray(b.buffer, b.seck.dq, b.seck.dqlen),
+        )
+        let r5 = CT.isEqual(
+          getArray(a.buffer, a.seck.iq, a.seck.iqlen),
+          getArray(b.buffer, b.seck.iq, b.seck.iqlen),
+        )
+        let r6 = CT.isEqual(
+          getArray(a.buffer, a.pexp, a.pexplen), getArray(b.buffer, b.pexp, b.pexplen)
+        )
+        let r7 = CT.isEqual(
+          getArray(a.buffer, a.pubk.n, a.pubk.nlen),
+          getArray(b.buffer, b.pubk.n, b.pubk.nlen),
+        )
+        let r8 = CT.isEqual(
+          getArray(a.buffer, a.pubk.e, a.pubk.elen),
+          getArray(b.buffer, b.pubk.e, b.pubk.elen),
+        )
         r1 and r2 and r3 and r4 and r5 and r6 and r7 and r8
       else:
         true
@@ -740,14 +732,17 @@ proc `==`*(a, b: RsaPublicKey): bool =
   elif isNil(b) and (not isNil(a)):
     false
   else:
-    let r1 = CT.isEqual(getArray(a.buffer, a.key.n, a.key.nlen),
-                        getArray(b.buffer, b.key.n, b.key.nlen))
-    let r2 = CT.isEqual(getArray(a.buffer, a.key.e, a.key.elen),
-                        getArray(b.buffer, b.key.e, b.key.elen))
+    let r1 = CT.isEqual(
+      getArray(a.buffer, a.key.n, a.key.nlen), getArray(b.buffer, b.key.n, b.key.nlen)
+    )
+    let r2 = CT.isEqual(
+      getArray(a.buffer, a.key.e, a.key.elen), getArray(b.buffer, b.key.e, b.key.elen)
+    )
     (r1 and r2)
 
-proc sign*[T: byte|char](key: RsaPrivateKey,
-                         message: openArray[T]): RsaResult[RsaSignature] {.gcsafe.} =
+proc sign*[T: byte | char](
+    key: RsaPrivateKey, message: openArray[T]
+): RsaResult[RsaSignature] {.gcsafe.} =
   ## Get RSA PKCS1.5 signature of data ``message`` using SHA256 and private
   ## key ``key``.
   if isNil(key):
@@ -766,16 +761,16 @@ proc sign*[T: byte|char](key: RsaPrivateKey,
     kv.update(addr hc.vtable, nil, 0)
   kv.out(addr hc.vtable, addr hash[0])
   var oid = RsaOidSha256
-  let implRes = impl(addr oid[0],
-                 addr hash[0], uint(len(hash)),
-                 addr key.seck, addr res.buffer[0])
+  let implRes =
+    impl(addr oid[0], addr hash[0], uint(len(hash)), addr key.seck, addr res.buffer[0])
   if implRes == 0:
     err(RsaSignatureError)
   else:
     ok(res)
 
-proc verify*[T: byte|char](sig: RsaSignature, message: openArray[T],
-                           pubkey: RsaPublicKey): bool {.inline.} =
+proc verify*[T: byte | char](
+    sig: RsaSignature, message: openArray[T], pubkey: RsaPublicKey
+): bool {.inline.} =
   ## Verify RSA signature ``sig`` using public key ``pubkey`` and data
   ## ``message``.
   ##
@@ -795,8 +790,13 @@ proc verify*[T: byte|char](sig: RsaSignature, message: openArray[T],
       kv.update(addr hc.vtable, nil, 0)
     kv.out(addr hc.vtable, addr hash[0])
     var oid = RsaOidSha256
-    let res = impl(addr sig.buffer[0], uint(len(sig.buffer)),
-                   addr oid[0],
-                   uint(len(check)), addr pubkey.key, addr check[0])
+    let res = impl(
+      addr sig.buffer[0],
+      uint(len(sig.buffer)),
+      addr oid[0],
+      uint(len(check)),
+      addr pubkey.key,
+      addr check[0],
+    )
     if res == 1:
       result = equalMem(addr check[0], addr hash[0], len(hash))

libp2p/crypto/secp.nim

@@ -7,26 +7,18 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import bearssl/rand
-import
-  secp256k1,
-  stew/[byteutils, results],
-  nimcrypto/[hash, sha2]
+import secp256k1, stew/[byteutils, results], nimcrypto/[hash, sha2]
 
 export sha2, results, rand
 
 const
-  SkRawPrivateKeySize* = 256 div 8
-    ## Size of private key in octets (bytes)
+  SkRawPrivateKeySize* = 256 div 8 ## Size of private key in octets (bytes)
   SkRawSignatureSize* = SkRawPrivateKeySize * 2 + 1
     ## Size of signature in octets (bytes)
-  SkRawPublicKeySize* = SkRawPrivateKeySize + 1
-    ## Size of public key in octets (bytes)
+  SkRawPublicKeySize* = SkRawPrivateKeySize + 1 ## Size of public key in octets (bytes)
 
 # This is extremely confusing but it's to avoid.. confusion between Eth standard and Secp standard
 type
@@ -35,9 +27,6 @@ type
   SkSignature* = distinct secp256k1.SkSignature
   SkKeyPair* = distinct secp256k1.SkKeyPair
 
-template pubkey*(v: SkKeyPair): SkPublicKey = SkPublicKey(secp256k1.SkKeyPair(v).pubkey)
-template seckey*(v: SkKeyPair): SkPrivateKey = SkPrivateKey(secp256k1.SkKeyPair(v).seckey)
-
 proc random*(t: typedesc[SkPrivateKey], rng: var HmacDrbgContext): SkPrivateKey =
   #TODO is there a better way?
   var rngPtr = addr rng
@@ -62,31 +51,31 @@ template pubkey*(v: SkKeyPair): SkPublicKey =
 proc init*(key: var SkPrivateKey, data: openArray[byte]): SkResult[void] =
   ## Initialize Secp256k1 `private key` ``key`` from raw binary
   ## representation ``data``.
-  key = SkPrivateKey(? secp256k1.SkSecretKey.fromRaw(data))
+  key = SkPrivateKey(?secp256k1.SkSecretKey.fromRaw(data))
   ok()
 
 proc init*(key: var SkPrivateKey, data: string): SkResult[void] =
   ## Initialize Secp256k1 `private key` ``key`` from hexadecimal string
   ## representation ``data``.
-  key = SkPrivateKey(? secp256k1.SkSecretKey.fromHex(data))
+  key = SkPrivateKey(?secp256k1.SkSecretKey.fromHex(data))
   ok()
 
 proc init*(key: var SkPublicKey, data: openArray[byte]): SkResult[void] =
   ## Initialize Secp256k1 `public key` ``key`` from raw binary
   ## representation ``data``.
-  key = SkPublicKey(? secp256k1.SkPublicKey.fromRaw(data))
+  key = SkPublicKey(?secp256k1.SkPublicKey.fromRaw(data))
   ok()
 
 proc init*(key: var SkPublicKey, data: string): SkResult[void] =
   ## Initialize Secp256k1 `public key` ``key`` from hexadecimal string
   ## representation ``data``.
-  key = SkPublicKey(? secp256k1.SkPublicKey.fromHex(data))
+  key = SkPublicKey(?secp256k1.SkPublicKey.fromHex(data))
   ok()
 
 proc init*(sig: var SkSignature, data: openArray[byte]): SkResult[void] =
   ## Initialize Secp256k1 `signature` ``sig`` from raw binary
   ## representation ``data``.
-  sig = SkSignature(? secp256k1.SkSignature.fromDer(data))
+  sig = SkSignature(?secp256k1.SkSignature.fromDer(data))
   ok()
 
 proc init*(sig: var SkSignature, data: string): SkResult[void] =
@@ -157,7 +146,7 @@ proc toBytes*(key: SkPrivateKey, data: var openArray[byte]): SkResult[int] =
   ## Procedure returns number of bytes (octets) needed to store
   ## Secp256k1 private key.
   if len(data) >= SkRawPrivateKeySize:
-    data[0..<SkRawPrivateKeySize] = SkSecretKey(key).toRaw()
+    data[0 ..< SkRawPrivateKeySize] = SkSecretKey(key).toRaw()
     ok(SkRawPrivateKeySize)
   else:
     err("secp: Not enough bytes")
@@ -169,7 +158,7 @@ proc toBytes*(key: SkPublicKey, data: var openArray[byte]): SkResult[int] =
   ## Procedure returns number of bytes (octets) needed to store
   ## Secp256k1 public key.
   if len(data) >= SkRawPublicKeySize:
-    data[0..<SkRawPublicKeySize] = secp256k1.SkPublicKey(key).toRawCompressed()
+    data[0 ..< SkRawPublicKeySize] = secp256k1.SkPublicKey(key).toRawCompressed()
     ok(SkRawPublicKeySize)
   else:
     err("secp: Not enough bytes")
@@ -196,22 +185,28 @@ proc getBytes*(sig: SkSignature): seq[byte] {.inline.} =
   let length = toBytes(sig, result)
   result.setLen(length)
 
-proc sign*[T: byte|char](key: SkPrivateKey, msg: openArray[T]): SkSignature =
+proc sign*[T: byte | char](key: SkPrivateKey, msg: openArray[T]): SkSignature =
   ## Sign message `msg` using private key `key` and return signature object.
   let h = sha256.digest(msg)
   SkSignature(sign(SkSecretKey(key), SkMessage(h.data)))
 
-proc verify*[T: byte|char](sig: SkSignature, msg: openArray[T],
-                           key: SkPublicKey): bool =
+proc verify*[T: byte | char](
+    sig: SkSignature, msg: openArray[T], key: SkPublicKey
+): bool =
   let h = sha256.digest(msg)
   verify(secp256k1.SkSignature(sig), SkMessage(h.data), secp256k1.SkPublicKey(key))
 
-func clear*(key: var SkPrivateKey) = clear(secp256k1.SkSecretKey(key))
+func clear*(key: var SkPrivateKey) =
+  clear(secp256k1.SkSecretKey(key))
 
-func `$`*(key: SkPrivateKey): string = $secp256k1.SkSecretKey(key)
-func `$`*(key: SkPublicKey): string = $secp256k1.SkPublicKey(key)
-func `$`*(key: SkSignature): string = $secp256k1.SkSignature(key)
-func `$`*(key: SkKeyPair): string = $secp256k1.SkKeyPair(key)
+func `$`*(key: SkPrivateKey): string =
+  $secp256k1.SkSecretKey(key)
+func `$`*(key: SkPublicKey): string =
+  $secp256k1.SkPublicKey(key)
+func `$`*(key: SkSignature): string =
+  $secp256k1.SkSignature(key)
+func `$`*(key: SkKeyPair): string =
+  $secp256k1.SkKeyPair(key)
 
 func `==`*(a, b: SkPrivateKey): bool =
   secp256k1.SkSecretKey(a) == secp256k1.SkSecretKey(b)

libp2p/daemon/transpool.nim

@@ -7,31 +7,29 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 ## This module implements Pool of StreamTransport.
 import chronos
 
-const
-  DefaultPoolSize* = 8
-    ## Default pool size
+const DefaultPoolSize* = 8 ## Default pool size
 
 type
   ConnectionFlags = enum
-    None, Busy
+    None
+    Busy
 
   PoolItem = object
     transp*: StreamTransport
     flags*: set[ConnectionFlags]
 
   PoolState = enum
-    Connecting, Connected, Closing, Closed
+    Connecting
+    Connected
+    Closing
+    Closed
 
-  TransportPool* = ref object
-    ## Transports pool object
+  TransportPool* = ref object ## Transports pool object
     transports: seq[PoolItem]
     busyCount: int
     state: PoolState
@@ -48,13 +46,16 @@ proc waitAll[T](futs: seq[Future[T]]): Future[void] =
     dec(counter)
     if counter == 0:
       retFuture.complete()
+
   for fut in futs:
     fut.addCallback(cb)
   return retFuture
 
-proc newPool*(address: TransportAddress, poolsize: int = DefaultPoolSize,
-              bufferSize = DefaultStreamBufferSize,
-             ): Future[TransportPool] {.async.} =
+proc newPool*(
+    address: TransportAddress,
+    poolsize: int = DefaultPoolSize,
+    bufferSize = DefaultStreamBufferSize,
+): Future[TransportPool] {.async.} =
   ## Establish pool of connections to address ``address`` with size
   ## ``poolsize``.
   var pool = new TransportPool
@@ -62,12 +63,12 @@ proc newPool*(address: TransportAddress, poolsize: int = DefaultPoolSize,
   pool.transports = newSeq[PoolItem](poolsize)
   var conns = newSeq[Future[StreamTransport]](poolsize)
   pool.state = Connecting
-  for i in 0..<poolsize:
+  for i in 0 ..< poolsize:
     conns[i] = connect(address, bufferSize)
   # Waiting for all connections to be established.
   await waitAll(conns)
   # Checking connections and preparing pool.
-  for i in 0..<poolsize:
+  for i in 0 ..< poolsize:
     if conns[i].failed:
       raise conns[i].error
     else:
@@ -137,7 +138,7 @@ proc close*(pool: TransportPool) {.async.} =
     await pool.join()
     # Closing all transports
     var pending = newSeq[Future[void]](len(pool.transports))
-    for i in 0..<len(pool.transports):
+    for i in 0 ..< len(pool.transports):
       let transp = pool.transports[i].transp
       transp.close()
       pending[i] = transp.join()

libp2p/debugutils.nim

@@ -25,34 +25,40 @@
 ##   5. LocalAddress: optional bytes
 ##   6. RemoteAddress: optional bytes
 ##   7. Message: required bytes
-import os, options
+import os
 import nimcrypto/utils, stew/endians2
-import protobuf/minprotobuf, stream/connection, protocols/secure/secure,
-       multiaddress, peerid, varint, muxers/mplex/coder
+import
+  protobuf/minprotobuf,
+  stream/connection,
+  protocols/secure/secure,
+  multiaddress,
+  peerid,
+  varint,
+  muxers/mplex/coder
 
-from times import getTime, toUnix, fromUnix, nanosecond, format, Time,
-                  NanosecondRange, initTime
+from times import
+  getTime, toUnix, fromUnix, nanosecond, format, Time, NanosecondRange, initTime
 from strutils import toHex, repeat
-export peerid, options, multiaddress
+export peerid, multiaddress
 
 type
   FlowDirection* = enum
-    Outgoing, Incoming
+    Outgoing
+    Incoming
 
   ProtoMessage* = object
     timestamp*: uint64
     direction*: FlowDirection
     message*: seq[byte]
-    seqID*: Option[uint64]
-    mtype*: Option[uint64]
-    local*: Option[MultiAddress]
-    remote*: Option[MultiAddress]
+    seqID*: Opt[uint64]
+    mtype*: Opt[uint64]
+    local*: Opt[MultiAddress]
+    remote*: Opt[MultiAddress]
 
-const
-  libp2p_dump_dir* {.strdefine.} = "nim-libp2p"
-    ## default directory where all the dumps will be stored, if the path
-    ## relative it will be created in home directory. You can overload this path
-    ## using ``-d:libp2p_dump_dir=<otherpath>``.
+const libp2p_dump_dir* {.strdefine.} = "nim-libp2p"
+  ## default directory where all the dumps will be stored, if the path
+  ## relative it will be created in home directory. You can overload this path
+  ## using ``-d:libp2p_dump_dir=<otherpath>``.
 
 proc getTimestamp(): uint64 =
   ## This procedure is present because `stdlib.times` missing it.
@@ -65,14 +71,14 @@ proc getTimedate(value: uint64): string =
   let time = initTime(int64(value div 1_000_000_000), value mod 1_000_000_000)
   time.format("yyyy-MM-dd HH:mm:ss'.'fffzzz")
 
-proc dumpMessage*(conn: SecureConn, direction: FlowDirection,
-                  data: openArray[byte]) =
+proc dumpMessage*(conn: SecureConn, direction: FlowDirection, data: openArray[byte]) =
   ## Store unencrypted message ``data`` to dump file, all the metadata will be
   ## extracted from ``conn`` instance.
   var pb = initProtoBuffer(options = {WithVarintLength})
   pb.write(2, getTimestamp())
   pb.write(4, uint64(direction))
-  pb.write(6, conn.observedAddr)
+  conn.observedAddr.withValue(oaddr):
+    pb.write(6, oaddr)
   pb.write(7, data)
   pb.finish()
 
@@ -86,7 +92,7 @@ proc dumpMessage*(conn: SecureConn, direction: FlowDirection,
 
   # This is debugging procedure so it should not generate any exceptions,
   # and we going to return at every possible OS error.
-  if not(dirExists(dirName)):
+  if not (dirExists(dirName)):
     try:
       createDir(dirName)
     except CatchableError:
@@ -100,7 +106,7 @@ proc dumpMessage*(conn: SecureConn, direction: FlowDirection,
   finally:
     close(handle)
 
-proc decodeDumpMessage*(data: openArray[byte]): Option[ProtoMessage] =
+proc decodeDumpMessage*(data: openArray[byte]): Opt[ProtoMessage] =
   ## Decode protobuf's message ProtoMessage from array of bytes ``data``.
   var
     pb = initProtoBuffer(data)
@@ -108,13 +114,12 @@ proc decodeDumpMessage*(data: openArray[byte]): Option[ProtoMessage] =
     ma1, ma2: MultiAddress
     pmsg: ProtoMessage
 
-  let res2 = pb.getField(2, pmsg.timestamp)
-  if res2.isErr() or not(res2.get()):
-    return none[ProtoMessage]()
-
-  let res4 = pb.getField(4, value)
-  if res4.isErr() or not(res4.get()):
-    return none[ProtoMessage]()
+  let
+    r2 = pb.getField(2, pmsg.timestamp)
+    r4 = pb.getField(4, value)
+    r7 = pb.getField(7, pmsg.message)
+  if not r2.get(false) or not r4.get(false) or not r7.get(false):
+    return Opt.none(ProtoMessage)
 
   # `case` statement could not work here with an error "selector must be of an
   # ordinal type, float or string"
@@ -124,30 +129,27 @@ proc decodeDumpMessage*(data: openArray[byte]): Option[ProtoMessage] =
     elif value == uint64(Incoming):
       Incoming
     else:
-      return none[ProtoMessage]()
+      return Opt.none(ProtoMessage)
 
-  let res7 = pb.getField(7, pmsg.message)
-  if res7.isErr() or not(res7.get()):
-    return none[ProtoMessage]()
+  let r1 = pb.getField(1, value)
+  if r1.get(false):
+    pmsg.seqID = Opt.some(value)
 
-  value = 0'u64
-  let res1 = pb.getField(1, value)
-  if res1.isOk() and res1.get():
-    pmsg.seqID = some(value)
-  value = 0'u64
-  let res3 = pb.getField(3, value)
-  if res3.isOk() and res3.get():
-    pmsg.mtype = some(value)
-  let res5 = pb.getField(5, ma1)
-  if res5.isOk() and res5.get():
-    pmsg.local = some(ma1)
-  let res6 = pb.getField(6, ma2)
-  if res6.isOk() and res6.get():
-    pmsg.remote = some(ma2)
+  let r3 = pb.getField(3, value)
+  if r3.get(false):
+    pmsg.mtype = Opt.some(value)
 
-  some(pmsg)
+  let
+    r5 = pb.getField(5, ma1)
+    r6 = pb.getField(6, ma2)
+  if r5.get(false):
+    pmsg.local = Opt.some(ma1)
+  if r6.get(false):
+    pmsg.remote = Opt.some(ma2)
 
-iterator messages*(data: seq[byte]): Option[ProtoMessage] =
+  Opt.some(pmsg)
+
+iterator messages*(data: seq[byte]): Opt[ProtoMessage] =
   ## Iterate over sequence of bytes and decode all the ``ProtoMessage``
   ## messages we found.
   var value: uint64
@@ -156,13 +158,11 @@ iterator messages*(data: seq[byte]): Option[ProtoMessage] =
   while offset < len(data):
     value = 0
     size = 0
-    let res = PB.getUVarint(data.toOpenArray(offset, len(data) - 1),
-                            size, value)
+    let res = PB.getUVarint(data.toOpenArray(offset, len(data) - 1), size, value)
     if res.isOk():
       if (value > 0'u64) and (value < uint64(len(data) - offset)):
         offset += size
-        yield decodeDumpMessage(data.toOpenArray(offset,
-                                                 offset + int(value) - 1))
+        yield decodeDumpMessage(data.toOpenArray(offset, offset + int(value) - 1))
         # value is previously checked to be less then len(data) which is `int`.
         offset += int(value)
       else:
@@ -182,10 +182,15 @@ proc dumpHex*(pbytes: openArray[byte], groupBy = 1, ascii = true): string =
 
     for k in 0 ..< groupBy:
       let ch = pbytes[offset + k]
-      ascii.add(if ord(ch) > 31 and ord(ch) < 127: char(ch) else: '.')
+      ascii.add(
+        if ord(ch) > 31 and ord(ch) < 127:
+          char(ch)
+        else:
+          '.'
+      )
 
     let item =
-      case groupBy:
+      case groupBy
       of 1:
         toHex(pbytes[offset])
       of 2:
@@ -207,8 +212,7 @@ proc dumpHex*(pbytes: openArray[byte], groupBy = 1, ascii = true): string =
       res.add("\p")
 
   if (offset mod 16) != 0:
-    let spacesCount = ((16 - (offset mod 16)) div groupBy) *
-                        (groupBy * 2 + 1) + 1
+    let spacesCount = ((16 - (offset mod 16)) div groupBy) * (groupBy * 2 + 1) + 1
     res = res & repeat(' ', spacesCount)
     res = res & ascii
 
@@ -236,31 +240,28 @@ proc toString*(msg: ProtoMessage, dump = true): string =
   var res = getTimedate(msg.timestamp)
   let direction =
     case msg.direction
-    of Incoming:
-      " << "
-    of Outgoing:
-      " >> "
-  let address =
-    block:
-      let local =
-        if msg.local.isSome():
-          "[" & $(msg.local.get()) & "]"
-        else:
-          "[LOCAL]"
-      let remote =
-        if msg.remote.isSome():
-          "[" & $(msg.remote.get()) & "]"
-        else:
-          "[REMOTE]"
-      local & direction & remote
-  let seqid =
-    if msg.seqID.isSome():
-      "seqID = " & $(msg.seqID.get()) & " "
+    of Incoming: " << "
+    of Outgoing: " >> "
+  let address = block:
+    let local = block:
+      msg.local.withValue(loc):
+        "[" & $loc & "]"
+      else:
+        "[LOCAL]"
+    let remote = block:
+      msg.remote.withValue(rem):
+        "[" & $rem & "]"
+      else:
+        "[REMOTE]"
+    local & direction & remote
+  let seqid = block:
+    msg.seqID.withValue(seqid):
+      "seqID = " & $seqid & " "
     else:
       ""
-  let mtype =
-    if msg.mtype.isSome():
-      "type = " & $(msg.mtype.get()) & " "
+  let mtype = block:
+    msg.mtype.withValue(typ):
+      "type = " & $typ & " "
     else:
       ""
   res.add(" ")

libp2p/dial.nim

@@ -7,28 +7,24 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import chronos
 import stew/results
-import peerid,
-       stream/connection,
-       transports/transport
+import peerid, stream/connection, transports/transport
 
 export results
 
-type
-  Dial* = ref object of RootObj
+type Dial* = ref object of RootObj
 
 method connect*(
-  self: Dial,
-  peerId: PeerId,
-  addrs: seq[MultiAddress],
-  forceDial = false,
-  reuseConnection = true) {.async, base.} =
+    self: Dial,
+    peerId: PeerId,
+    addrs: seq[MultiAddress],
+    forceDial = false,
+    reuseConnection = true,
+    dir = Direction.Out,
+) {.async, base.} =
   ## connect remote peer without negotiating
   ## a protocol
   ##
@@ -36,18 +32,15 @@ method connect*(
   doAssert(false, "Not implemented!")
 
 method connect*(
-  self: Dial,
-  address: MultiAddress,
-  allowUnknownPeerId = false): Future[PeerId] {.async, base.} =
+    self: Dial, address: MultiAddress, allowUnknownPeerId = false
+): Future[PeerId] {.async, base.} =
   ## Connects to a peer and retrieve its PeerId
 
   doAssert(false, "Not implemented!")
 
 method dial*(
-  self: Dial,
-  peerId: PeerId,
-  protos: seq[string],
-  ): Future[Connection] {.async, base.} =
+    self: Dial, peerId: PeerId, protos: seq[string]
+): Future[Connection] {.async, base.} =
   ## create a protocol stream over an
   ## existing connection
   ##
@@ -55,24 +48,22 @@ method dial*(
   doAssert(false, "Not implemented!")
 
 method dial*(
-  self: Dial,
-  peerId: PeerId,
-  addrs: seq[MultiAddress],
-  protos: seq[string],
-  forceDial = false): Future[Connection] {.async, base.} =
+    self: Dial,
+    peerId: PeerId,
+    addrs: seq[MultiAddress],
+    protos: seq[string],
+    forceDial = false,
+): Future[Connection] {.async, base.} =
   ## create a protocol stream and establish
   ## a connection if one doesn't exist already
   ##
 
   doAssert(false, "Not implemented!")
 
-method addTransport*(
-  self: Dial,
-  transport: Transport) {.base.} =
+method addTransport*(self: Dial, transport: Transport) {.base.} =
   doAssert(false, "Not implemented!")
 
 method tryDial*(
-  self: Dial,
-  peerId: PeerId,
-  addrs: seq[MultiAddress]): Future[Opt[MultiAddress]] {.async, base.} =
+    self: Dial, peerId: PeerId, addrs: seq[MultiAddress]
+): Future[Opt[MultiAddress]] {.async, base.} =
   doAssert(false, "Not implemented!")

libp2p/dialer.nim

@@ -7,24 +7,25 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-import std/[sugar, tables, sequtils]
+import std/tables
 
 import stew/results
-import pkg/[chronos,
-            chronicles,
-            metrics]
+import pkg/[chronos, chronicles, metrics]
 
-import dial,
-       peerid,
-       peerinfo,
-       multicodec,
-       multistream,
-       connmanager,
-       stream/connection,
-       transports/transport,
-       nameresolving/nameresolver,
-       upgrademngrs/upgrade,
-       errors
+import
+  dial,
+  peerid,
+  peerinfo,
+  peerstore,
+  multicodec,
+  muxers/muxer,
+  multistream,
+  connmanager,
+  stream/connection,
+  transports/transport,
+  nameresolving/nameresolver,
+  upgrademngrs/upgrade,
+  errors
 
 export dial, errors, results
 
@@ -34,74 +35,79 @@ logScope:
 declareCounter(libp2p_total_dial_attempts, "total attempted dials")
 declareCounter(libp2p_successful_dials, "dialed successful peers")
 declareCounter(libp2p_failed_dials, "failed dials")
-declareCounter(libp2p_failed_upgrades_outgoing, "outgoing connections failed upgrades")
 
 type
   DialFailedError* = object of LPError
 
   Dialer* = ref object of Dial
     localPeerId*: PeerId
-    ms: MultistreamSelect
     connManager: ConnManager
     dialLock: Table[PeerId, AsyncLock]
     transports: seq[Transport]
+    peerStore: PeerStore
     nameResolver: NameResolver
 
 proc dialAndUpgrade(
-  self: Dialer,
-  peerId: Opt[PeerId],
-  hostname: string,
-  address: MultiAddress):
-  Future[Connection] {.async.} =
-
+    self: Dialer,
+    peerId: Opt[PeerId],
+    hostname: string,
+    address: MultiAddress,
+    dir = Direction.Out,
+): Future[Muxer] {.async.} =
   for transport in self.transports: # for each transport
-    if transport.handles(address):   # check if it can dial it
-      trace "Dialing address", address, peerId, hostname
+    if transport.handles(address): # check if it can dial it
+      trace "Dialing address", address, peerId = peerId.get(default(PeerId)), hostname
       let dialed =
         try:
           libp2p_total_dial_attempts.inc()
           await transport.dial(hostname, address, peerId)
         except CancelledError as exc:
-          debug "Dialing canceled", msg = exc.msg, peerId
+          trace "Dialing canceled", err = exc.msg, peerId = peerId.get(default(PeerId))
           raise exc
         except CatchableError as exc:
-          debug "Dialing failed", msg = exc.msg, peerId
+          debug "Dialing failed", err = exc.msg, peerId = peerId.get(default(PeerId))
           libp2p_failed_dials.inc()
           return nil # Try the next address
 
-      # also keep track of the connection's bottom unsafe transport direction
-      # required by gossipsub scoring
-      dialed.transportDir = Direction.Out
-
       libp2p_successful_dials.inc()
 
-      let conn =
+      let mux =
         try:
-          await transport.upgradeOutgoing(dialed, peerId)
+          # This is for the very specific case of a simultaneous dial during DCUtR. In this case, both sides will have
+          # an Outbound direction at the transport level. Therefore we update the DCUtR initiator transport direction to Inbound.
+          # The if below is more general and might handle other use cases in the future.
+          if dialed.dir != dir:
+            dialed.dir = dir
+          await transport.upgrade(dialed, peerId)
+        except CancelledError as exc:
+          await dialed.close()
+          raise exc
         except CatchableError as exc:
           # If we failed to establish the connection through one transport,
           # we won't succeeded through another - no use in trying again
           await dialed.close()
-          debug "Upgrade failed", msg = exc.msg, peerId
-          if exc isnot CancelledError:
+          debug "Connection upgrade failed",
+            err = exc.msg, peerId = peerId.get(default(PeerId))
+          if dialed.dir == Direction.Out:
             libp2p_failed_upgrades_outgoing.inc()
+          else:
+            libp2p_failed_upgrades_incoming.inc()
 
           # Try other address
           return nil
 
-      doAssert not isNil(conn), "connection died after upgradeOutgoing"
-      debug "Dial successful", conn, peerId = conn.peerId
-      return conn
+      doAssert not isNil(mux), "connection died after upgrade " & $dialed.dir
+      debug "Dial successful", peerId = mux.connection.peerId
+      return mux
   return nil
 
 proc expandDnsAddr(
-  self: Dialer,
-  peerId: Opt[PeerId],
-  address: MultiAddress): Future[seq[(MultiAddress, Opt[PeerId])]] {.async.} =
-
-  if not DNSADDR.matchPartial(address): return @[(address, peerId)]
+    self: Dialer, peerId: Opt[PeerId], address: MultiAddress
+): Future[seq[(MultiAddress, Opt[PeerId])]] {.async.} =
+  if not DNSADDR.matchPartial(address):
+    return @[(address, peerId)]
   if isNil(self.nameResolver):
-    info "Can't resolve DNSADDR without NameResolver", ma=address
+    info "Can't resolve DNSADDR without NameResolver", ma = address
     return @[]
 
   let
@@ -118,17 +124,14 @@ proc expandDnsAddr(
       let
         peerIdBytes = lastPart.protoArgument().tryGet()
         addrPeerId = PeerId.init(peerIdBytes).tryGet()
-      result.add((resolvedAddress[0..^2].tryGet(), Opt.some(addrPeerId)))
+      result.add((resolvedAddress[0 ..^ 2].tryGet(), Opt.some(addrPeerId)))
     else:
       result.add((resolvedAddress, peerId))
 
 proc dialAndUpgrade(
-  self: Dialer,
-  peerId: Opt[PeerId],
-  addrs: seq[MultiAddress]):
-  Future[Connection] {.async.} =
-
-  debug "Dialing peer", peerId
+    self: Dialer, peerId: Opt[PeerId], addrs: seq[MultiAddress], dir = Direction.Out
+): Future[Muxer] {.async.} =
+  debug "Dialing peer", peerId = peerId.get(default(PeerId)), addrs
 
   for rawAddress in addrs:
     # resolve potential dnsaddr
@@ -139,37 +142,32 @@ proc dialAndUpgrade(
       let
         hostname = expandedAddress.getHostname()
         resolvedAddresses =
-          if isNil(self.nameResolver): @[expandedAddress]
-          else: await self.nameResolver.resolveMAddress(expandedAddress)
+          if isNil(self.nameResolver):
+            @[expandedAddress]
+          else:
+            await self.nameResolver.resolveMAddress(expandedAddress)
 
       for resolvedAddress in resolvedAddresses:
-        result = await self.dialAndUpgrade(addrPeerId, hostname, resolvedAddress)
+        result = await self.dialAndUpgrade(addrPeerId, hostname, resolvedAddress, dir)
         if not isNil(result):
           return result
 
-proc tryReusingConnection(self: Dialer, peerId: PeerId): Future[Opt[Connection]] {.async.} =
-  var conn = self.connManager.selectConn(peerId)
-  if conn == nil:
-    return Opt.none(Connection)
+proc tryReusingConnection(self: Dialer, peerId: PeerId): Opt[Muxer] =
+  let muxer = self.connManager.selectMuxer(peerId)
+  if muxer == nil:
+    return Opt.none(Muxer)
 
-  if conn.atEof or conn.closed:
-    # This connection should already have been removed from the connection
-    # manager - it's essentially a bug that we end up here - we'll fail
-    # for now, hoping that this will clean themselves up later...
-    warn "dead connection in connection manager", conn
-    await conn.close()
-    raise newException(DialFailedError, "Zombie connection encountered")
-
-  trace "Reusing existing connection", conn, direction = $conn.dir
-  return Opt.some(conn)
+  trace "Reusing existing connection", muxer, direction = $muxer.connection.dir
+  return Opt.some(muxer)
 
 proc internalConnect(
-  self: Dialer,
-  peerId: Opt[PeerId],
-  addrs: seq[MultiAddress],
-  forceDial: bool,
-  reuseConnection = true):
-  Future[Connection] {.async.} =
+    self: Dialer,
+    peerId: Opt[PeerId],
+    addrs: seq[MultiAddress],
+    forceDial: bool,
+    reuseConnection = true,
+    dir = Direction.Out,
+): Future[Muxer] {.async.} =
   if Opt.some(self.localPeerId) == peerId:
     raise newException(CatchableError, "can't dial self!")
 
@@ -178,43 +176,47 @@ proc internalConnect(
   try:
     await lock.acquire()
 
-    if peerId.isSome and reuseConnection:
-      let connOpt = await self.tryReusingConnection(peerId.get())
-      if connOpt.isSome:
-        return connOpt.get()
+    if reuseConnection:
+      peerId.withValue(peerId):
+        self.tryReusingConnection(peerId).withValue(mux):
+          return mux
 
     let slot = self.connManager.getOutgoingSlot(forceDial)
-    let conn =
+    let muxed =
       try:
-        await self.dialAndUpgrade(peerId, addrs)
+        await self.dialAndUpgrade(peerId, addrs, dir)
       except CatchableError as exc:
         slot.release()
         raise exc
-    slot.trackConnection(conn)
-    if isNil(conn): # None of the addresses connected
+    slot.trackMuxer(muxed)
+    if isNil(muxed): # None of the addresses connected
       raise newException(DialFailedError, "Unable to establish outgoing link")
 
-    # A disconnect could have happened right after
-    # we've added the connection so we check again
-    # to prevent races due to that.
-    if conn.closed() or conn.atEof():
-      # This can happen when the other ends drops us
-      # before we get a chance to return the connection
-      # back to the dialer.
-      trace "Connection dead on arrival", conn
-      raise newLPStreamClosedError()
+    try:
+      self.connManager.storeMuxer(muxed)
+      await self.peerStore.identify(muxed)
+      await self.connManager.triggerPeerEvents(
+        muxed.connection.peerId,
+        PeerEvent(kind: PeerEventKind.Identified, initiator: true),
+      )
+    except CatchableError as exc:
+      trace "Failed to finish outgoung upgrade", err = exc.msg
+      await muxed.close()
+      raise exc
 
-    return conn
+    return muxed
   finally:
     if lock.locked():
       lock.release()
 
 method connect*(
-  self: Dialer,
-  peerId: PeerId,
-  addrs: seq[MultiAddress],
-  forceDial = false,
-  reuseConnection = true) {.async.} =
+    self: Dialer,
+    peerId: PeerId,
+    addrs: seq[MultiAddress],
+    forceDial = false,
+    reuseConnection = true,
+    dir = Direction.Out,
+) {.async.} =
   ## connect remote peer without negotiating
   ## a protocol
   ##
@@ -222,34 +224,32 @@ method connect*(
   if self.connManager.connCount(peerId) > 0 and reuseConnection:
     return
 
-  discard await self.internalConnect(Opt.some(peerId), addrs, forceDial, reuseConnection)
+  discard
+    await self.internalConnect(Opt.some(peerId), addrs, forceDial, reuseConnection, dir)
 
 method connect*(
-  self: Dialer,
-  address: MultiAddress,
-  allowUnknownPeerId = false): Future[PeerId] {.async.} =
+    self: Dialer, address: MultiAddress, allowUnknownPeerId = false
+): Future[PeerId] {.async.} =
   ## Connects to a peer and retrieve its PeerId
 
-  let fullAddress = parseFullAddress(address)
-  if fullAddress.isOk:
-    return (await self.internalConnect(
-      Opt.some(fullAddress.get()[0]),
-      @[fullAddress.get()[1]],
-      false)).peerId
-  else:
-    if allowUnknownPeerId == false:
-      raise newException(DialFailedError, "Address without PeerID and unknown peer id disabled!")
-    return (await self.internalConnect(
-      Opt.none(PeerId),
-      @[address],
-      false)).peerId
+  parseFullAddress(address).toOpt().withValue(fullAddress):
+    return (
+      await self.internalConnect(Opt.some(fullAddress[0]), @[fullAddress[1]], false)
+    ).connection.peerId
+
+  if allowUnknownPeerId == false:
+    raise newException(
+      DialFailedError, "Address without PeerID and unknown peer id disabled!"
+    )
+
+  return
+    (await self.internalConnect(Opt.none(PeerId), @[address], false)).connection.peerId
 
 proc negotiateStream(
-  self: Dialer,
-  conn: Connection,
-  protos: seq[string]): Future[Connection] {.async.} =
+    self: Dialer, conn: Connection, protos: seq[string]
+): Future[Connection] {.async.} =
   trace "Negotiating stream", conn, protos
-  let selected = await self.ms.select(conn, protos)
+  let selected = await MultistreamSelect.select(conn, protos)
   if not protos.contains(selected):
     await conn.closeWithEOF()
     raise newException(DialFailedError, "Unable to select sub-protocol " & $protos)
@@ -257,9 +257,8 @@ proc negotiateStream(
   return conn
 
 method tryDial*(
-  self: Dialer,
-  peerId: PeerId,
-  addrs: seq[MultiAddress]): Future[Opt[MultiAddress]] {.async.} =
+    self: Dialer, peerId: PeerId, addrs: seq[MultiAddress]
+): Future[Opt[MultiAddress]] {.async.} =
   ## Create a protocol stream in order to check
   ## if a connection is possible.
   ## Doesn't use the Connection Manager to save it.
@@ -267,20 +266,19 @@ method tryDial*(
 
   trace "Check if it can dial", peerId, addrs
   try:
-    let conn = await self.dialAndUpgrade(Opt.some(peerId), addrs)
-    if conn.isNil():
+    let mux = await self.dialAndUpgrade(Opt.some(peerId), addrs)
+    if mux.isNil():
       raise newException(DialFailedError, "No valid multiaddress")
-    await conn.close()
-    return conn.observedAddr
+    await mux.close()
+    return mux.connection.observedAddr
   except CancelledError as exc:
     raise exc
   except CatchableError as exc:
     raise newException(DialFailedError, exc.msg)
 
 method dial*(
-  self: Dialer,
-  peerId: PeerId,
-  protos: seq[string]): Future[Connection] {.async.} =
+    self: Dialer, peerId: PeerId, protos: seq[string]
+): Future[Connection] {.async.} =
   ## create a protocol stream over an
   ## existing connection
   ##
@@ -293,24 +291,25 @@ method dial*(
   return await self.negotiateStream(stream, protos)
 
 method dial*(
-  self: Dialer,
-  peerId: PeerId,
-  addrs: seq[MultiAddress],
-  protos: seq[string],
-  forceDial = false): Future[Connection] {.async.} =
+    self: Dialer,
+    peerId: PeerId,
+    addrs: seq[MultiAddress],
+    protos: seq[string],
+    forceDial = false,
+): Future[Connection] {.async.} =
   ## create a protocol stream and establish
   ## a connection if one doesn't exist already
   ##
 
   var
-    conn: Connection
+    conn: Muxer
     stream: Connection
 
   proc cleanup() {.async.} =
-    if not(isNil(stream)):
+    if not (isNil(stream)):
       await stream.closeWithEOF()
 
-    if not(isNil(conn)):
+    if not (isNil(conn)):
       await conn.close()
 
   try:
@@ -320,8 +319,7 @@ method dial*(
     stream = await self.connManager.getStream(conn)
 
     if isNil(stream):
-      raise newException(DialFailedError,
-        "Couldn't get muxed stream")
+      raise newException(DialFailedError, "Couldn't get muxed stream")
 
     return await self.negotiateStream(stream, protos)
   except CancelledError as exc:
@@ -329,7 +327,7 @@ method dial*(
     await cleanup()
     raise exc
   except CatchableError as exc:
-    debug "Error dialing", conn, msg = exc.msg
+    debug "Error dialing", conn, err = exc.msg
     await cleanup()
     raise exc
 
@@ -337,15 +335,17 @@ method addTransport*(self: Dialer, t: Transport) =
   self.transports &= t
 
 proc new*(
-  T: type Dialer,
-  localPeerId: PeerId,
-  connManager: ConnManager,
-  transports: seq[Transport],
-  ms: MultistreamSelect,
-  nameResolver: NameResolver = nil): Dialer =
-
-  T(localPeerId: localPeerId,
+    T: type Dialer,
+    localPeerId: PeerId,
+    connManager: ConnManager,
+    peerStore: PeerStore,
+    transports: seq[Transport],
+    nameResolver: NameResolver = nil,
+): Dialer =
+  T(
+    localPeerId: localPeerId,
     connManager: connManager,
     transports: transports,
-    ms: ms,
-    nameResolver: nameResolver)
+    peerStore: peerStore,
+    nameResolver: nameResolver,
+  )

libp2p/discovery/discoverymngr.nim

@@ -7,10 +7,7 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/sequtils
 import chronos, chronicles, stew/results
@@ -18,7 +15,7 @@ import ../errors
 
 type
   BaseAttr = ref object of RootObj
-    comparator: proc(f, c: BaseAttr): bool {.gcsafe, raises: [Defect].}
+    comparator: proc(f, c: BaseAttr): bool {.gcsafe, raises: [].}
 
   Attribute[T] = ref object of BaseAttr
     value: T
@@ -36,12 +33,13 @@ proc ofType*[T](f: BaseAttr, _: type[T]): bool =
 proc to*[T](f: BaseAttr, _: type[T]): T =
   Attribute[T](f).value
 
-proc add*[T](pa: var PeerAttributes,
-             value: T) =
-  pa.attributes.add(Attribute[T](
+proc add*[T](pa: var PeerAttributes, value: T) =
+  pa.attributes.add(
+    Attribute[T](
       value: value,
       comparator: proc(f: BaseAttr, c: BaseAttr): bool =
         f.ofType(T) and c.ofType(T) and f.to(T) == c.to(T)
+      ,
     )
   )
 
@@ -60,8 +58,9 @@ proc `{}`*[T](pa: PeerAttributes, t: typedesc[T]): Opt[T] =
       return Opt.some(f.to(T))
   Opt.none(T)
 
-proc `[]`*[T](pa: PeerAttributes, t: typedesc[T]): T {.raises: [Defect, KeyError].} =
-  pa{T}.valueOr: raise newException(KeyError, "Attritute not found")
+proc `[]`*[T](pa: PeerAttributes, t: typedesc[T]): T {.raises: [KeyError].} =
+  pa{T}.valueOr:
+    raise newException(KeyError, "Attritute not found")
 
 proc match*(pa, candidate: PeerAttributes): bool =
   for f in pa.attributes:
@@ -73,7 +72,7 @@ proc match*(pa, candidate: PeerAttributes): bool =
   return true
 
 type
-  PeerFoundCallback* = proc(pa: PeerAttributes) {.raises: [Defect], gcsafe.}
+  PeerFoundCallback* = proc(pa: PeerAttributes) {.raises: [], gcsafe.}
 
   DiscoveryInterface* = ref object of RootObj
     onPeerFound*: PeerFoundCallback
@@ -104,7 +103,7 @@ type
 proc add*(dm: DiscoveryManager, di: DiscoveryInterface) =
   dm.interfaces &= di
 
-  di.onPeerFound = proc (pa: PeerAttributes) =
+  di.onPeerFound = proc(pa: PeerAttributes) =
     for query in dm.queries:
       if query.attr.match(pa):
         try:
@@ -125,20 +124,15 @@ proc request*[T](dm: DiscoveryManager, value: T): DiscoveryQuery =
   pa.add(value)
   return dm.request(pa)
 
-proc advertise*(dm: DiscoveryManager, pa: PeerAttributes) =
+proc advertise*[T](dm: DiscoveryManager, value: T) =
   for i in dm.interfaces:
-    i.toAdvertise = pa
+    i.toAdvertise.add(value)
     if i.advertiseLoop.isNil:
       i.advertisementUpdated = newAsyncEvent()
       i.advertiseLoop = i.advertise()
     else:
       i.advertisementUpdated.fire()
 
-proc advertise*[T](dm: DiscoveryManager, value: T) =
-  var pa: PeerAttributes
-  pa.add(value)
-  dm.advertise(pa)
-
 template forEach*(query: DiscoveryQuery, code: untyped) =
   ## Will execute `code` for each discovered peer. The
   ## peer attritubtes are available through the variable
@@ -147,8 +141,10 @@ template forEach*(query: DiscoveryQuery, code: untyped) =
   proc forEachInternal(q: DiscoveryQuery) {.async.} =
     while true:
       let peer {.inject.} =
-        try: await q.getPeer()
-        except DiscoveryFinished: return
+        try:
+          await q.getPeer()
+        except DiscoveryFinished:
+          return
       code
 
   asyncSpawn forEachInternal(query)
@@ -156,13 +152,15 @@ template forEach*(query: DiscoveryQuery, code: untyped) =
 proc stop*(query: DiscoveryQuery) =
   query.finished = true
   for r in query.futs:
-    if not r.finished(): r.cancel()
+    if not r.finished():
+      r.cancel()
 
 proc stop*(dm: DiscoveryManager) =
   for q in dm.queries:
     q.stop()
   for i in dm.interfaces:
-    if isNil(i.advertiseLoop): continue
+    if isNil(i.advertiseLoop):
+      continue
     i.advertiseLoop.cancel()
 
 proc getPeer*(query: DiscoveryQuery): Future[PeerAttributes] {.async.} =

libp2p/discovery/rendezvousinterface.nim

@@ -7,22 +7,17 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import sequtils
 import chronos
-import ./discoverymngr,
-       ../protocols/rendezvous,
-       ../peerid
+import ./discoverymngr, ../protocols/rendezvous, ../peerid
 
 type
   RendezVousInterface* = ref object of DiscoveryInterface
     rdv*: RendezVous
     timeToRequest: Duration
     timeToAdvertise: Duration
+    ttl: Duration
 
   RdvNamespace* = distinct string
 
@@ -66,12 +61,18 @@ method advertise*(self: RendezVousInterface) {.async.} =
 
     self.advertisementUpdated.clear()
     for toAdv in toAdvertise:
-      await self.rdv.advertise(toAdv, self.timeToAdvertise)
+      try:
+        await self.rdv.advertise(toAdv, self.ttl)
+      except CatchableError as error:
+        debug "RendezVous advertise error: ", msg = error.msg
 
     await sleepAsync(self.timeToAdvertise) or self.advertisementUpdated.wait()
 
-proc new*(T: typedesc[RendezVousInterface],
-          rdv: RendezVous,
-          ttr: Duration = 1.minutes,
-          tta: Duration = MinimumDuration): RendezVousInterface =
-  T(rdv: rdv, timeToRequest: ttr, timeToAdvertise: tta)
+proc new*(
+    T: typedesc[RendezVousInterface],
+    rdv: RendezVous,
+    ttr: Duration = 1.minutes,
+    tta: Duration = 1.minutes,
+    ttl: Duration = MinimumDuration,
+): RendezVousInterface =
+  T(rdv: rdv, timeToRequest: ttr, timeToAdvertise: tta, ttl: ttl)

libp2p/errors.nim

@@ -19,58 +19,30 @@ func toException*(e: string): ref LPError =
 # sadly nim needs more love for hygienic templates
 # so here goes the macro, its based on the proc/template version
 # and uses quote do so it's quite readable
-macro checkFutures*[T](futs: seq[Future[T]], exclude: untyped = []): untyped =
+# TODO https://github.com/nim-lang/Nim/issues/22936
+macro checkFutures*[F](futs: seq[F], exclude: untyped = []): untyped =
   let nexclude = exclude.len
   case nexclude
   of 0:
-    quote do:
+    quote:
       for res in `futs`:
         if res.failed:
           let exc = res.readError()
           # We still don't abort but warn
-          debug "A future has failed, enable trace logging for details", error = exc.name
-          trace "Exception message", msg= exc.msg, stack = getStackTrace()
+          debug "A future has failed, enable trace logging for details",
+            error = exc.name
+          trace "Exception message", msg = exc.msg, stack = getStackTrace()
   else:
-    quote do:
+    quote:
       for res in `futs`:
         block check:
           if res.failed:
             let exc = res.readError()
-            for i in 0..<`nexclude`:
+            for i in 0 ..< `nexclude`:
               if exc of `exclude`[i]:
-                trace "A future has failed", error=exc.name, msg=exc.msg
+                trace "A future has failed", error = exc.name, msg = exc.msg
                 break check
             # We still don't abort but warn
-            debug "A future has failed, enable trace logging for details", error=exc.name
-            trace "Exception details", msg=exc.msg
-
-proc allFuturesThrowing*[T](args: varargs[Future[T]]): Future[void] =
-  var futs: seq[Future[T]]
-  for fut in args:
-    futs &= fut
-  proc call() {.async.} =
-    var first: ref CatchableError = nil
-    futs = await allFinished(futs)
-    for fut in futs:
-      if fut.failed:
-        let err = fut.readError()
-        if err of Defect:
-          raise err
-        else:
-          if err of CancelledError:
-            raise err
-          if isNil(first):
-            first = err
-    if not isNil(first):
-      raise first
-
-  return call()
-
-template tryAndWarn*(message: static[string]; body: untyped): untyped =
-  try:
-    body
-  except CancelledError as exc:
-    raise exc
-  except CatchableError as exc:
-    debug "An exception has ocurred, enable trace logging for details", name = exc.name, msg = message
-    trace "Exception details", exc = exc.msg
+            debug "A future has failed, enable trace logging for details",
+              error = exc.name
+            trace "Exception details", msg = exc.msg

libp2p/multiaddress.nim

@@ -9,23 +9,35 @@
 
 ## This module implements MultiAddress.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 {.push public.}
 
-import pkg/chronos
-import std/[nativesockets, hashes]
-import tables, strutils, sets, stew/shims/net
-import multicodec, multihash, multibase, transcoder, vbuffer, peerid,
-       protobuf/minprotobuf, errors, utility
+import pkg/chronos, chronicles
+import std/[nativesockets, net, hashes]
+import tables, strutils, sets
+import
+  multicodec,
+  multihash,
+  multibase,
+  transcoder,
+  vbuffer,
+  peerid,
+  protobuf/minprotobuf,
+  errors,
+  utility
 import stew/[base58, base32, endians2, results]
 export results, minprotobuf, vbuffer, utility
 
+logScope:
+  topics = "libp2p multiaddress"
+
 type
   MAKind* = enum
-    None, Fixed, Length, Path, Marker
+    None
+    Fixed
+    Length
+    Path
+    Marker
 
   MAProtocol* = object
     mcodec*: MultiCodec
@@ -34,10 +46,12 @@ type
     coder*: Transcoder
 
   MultiAddress* = object
-    data*: VBuffer
+    data: VBuffer
 
   MaPatternOp* = enum
-    Eq, Or, And
+    Eq
+    Or
+    And
 
   MaPattern* = object
     operator*: MaPatternOp
@@ -63,6 +77,10 @@ const
   IPPROTO_TCP = Protocol.IPPROTO_TCP
   IPPROTO_UDP = Protocol.IPPROTO_UDP
 
+proc data*(ma: MultiAddress): VBuffer =
+  ## Returns the data buffer of the MultiAddress.
+  return ma.data
+
 proc hash*(a: MultiAddress): Hash =
   var h: Hash = 0
   h = h !& hash(a.data.buffer)
@@ -76,7 +94,7 @@ proc ip4StB(s: string, vb: var VBuffer): bool =
     if a.family == IpAddressFamily.IPv4:
       vb.writeArray(a.address_v4)
       result = true
-  except:
+  except CatchableError:
     discard
 
 proc ip4BtS(vb: var VBuffer, s: var string): bool =
@@ -99,7 +117,7 @@ proc ip6StB(s: string, vb: var VBuffer): bool =
     if a.family == IpAddressFamily.IPv6:
       vb.writeArray(a.address_v6)
       result = true
-  except:
+  except CatchableError:
     discard
 
 proc ip6BtS(vb: var VBuffer, s: var string): bool =
@@ -115,23 +133,40 @@ proc ip6VB(vb: var VBuffer): bool =
   if vb.readArray(a.address_v6) == 16:
     result = true
 
-proc ip6zoneStB(s: string, vb: var VBuffer): bool =
-  ## IPv6 stringToBuffer() implementation.
+template pathStringToBuffer(s: string, vb: var VBuffer): bool =
   if len(s) > 0:
     vb.writeSeq(s)
-    result = true
+    true
+  else:
+    false
+
+template pathBufferToString(vb: var VBuffer, s: var string): bool =
+  s = ""
+  if (vb.readSeq(s) > 0) and (len(s) > 0): true else: false
+
+template pathBufferToStringNoSlash(vb: var VBuffer, s: var string): bool =
+  s = ""
+  if (vb.readSeq(s) > 0) and (len(s) > 0) and (s.find('/') == -1): true else: false
+
+template pathValidateBuffer(vb: var VBuffer): bool =
+  var s = ""
+  pathBufferToString(vb, s)
+
+template pathValidateBufferNoSlash(vb: var VBuffer): bool =
+  var s = ""
+  pathBufferToStringNoSlash(vb, s)
+
+proc ip6zoneStB(s: string, vb: var VBuffer): bool =
+  ## IPv6 stringToBuffer() implementation.
+  pathStringToBuffer(s, vb)
 
 proc ip6zoneBtS(vb: var VBuffer, s: var string): bool =
   ## IPv6 bufferToString() implementation.
-  if vb.readSeq(s) > 0:
-    result = true
+  pathBufferToStringNoSlash(vb, s)
 
 proc ip6zoneVB(vb: var VBuffer): bool =
   ## IPv6 validateBuffer() implementation.
-  var s = ""
-  if vb.readSeq(s) > 0:
-    if s.find('/') == -1:
-      result = true
+  pathValidateBufferNoSlash(vb)
 
 proc portStB(s: string, vb: var VBuffer): bool =
   ## Port number stringToBuffer() implementation.
@@ -143,14 +178,14 @@ proc portStB(s: string, vb: var VBuffer): bool =
       port[1] = cast[byte](nport and 0xFF)
       vb.writeArray(port)
       result = true
-  except:
+  except CatchableError:
     discard
 
 proc portBtS(vb: var VBuffer, s: var string): bool =
   ## Port number bufferToString() implementation.
   var port: array[2, byte]
   if vb.readArray(port) == 2:
-    var nport = (cast[uint16](port[0]) shl 8) or cast[uint16](port[1])
+    let nport = (safeConvert[uint16](port[0]) shl 8) or safeConvert[uint16](port[1])
     s = $nport
     result = true
 
@@ -168,7 +203,7 @@ proc p2pStB(s: string, vb: var VBuffer): bool =
     if MultiHash.decode(data, mh).isOk:
       vb.writeSeq(data)
       result = true
-  except:
+  except CatchableError:
     discard
 
 proc p2pBtS(vb: var VBuffer, s: var string): bool =
@@ -203,14 +238,14 @@ proc onionStB(s: string, vb: var VBuffer): bool =
       address[11] = cast[byte](nport and 0xFF)
       vb.writeArray(address)
       result = true
-  except:
+  except CatchableError:
     discard
 
 proc onionBtS(vb: var VBuffer, s: var string): bool =
   ## ONION address bufferToString() implementation.
   var buf: array[12, byte]
   if vb.readArray(buf) == 12:
-    var nport = (cast[uint16](buf[10]) shl 8) or cast[uint16](buf[11])
+    let nport = (safeConvert[uint16](buf[10]) shl 8) or safeConvert[uint16](buf[11])
     s = Base32Lower.encode(buf.toOpenArray(0, 9))
     s.add(":")
     s.add($nport)
@@ -237,14 +272,14 @@ proc onion3StB(s: string, vb: var VBuffer): bool =
       address[36] = cast[byte](nport and 0xFF)
       vb.writeArray(address)
       result = true
-  except:
+  except CatchableError:
     discard
 
 proc onion3BtS(vb: var VBuffer, s: var string): bool =
   ## ONION address bufferToString() implementation.
   var buf: array[37, byte]
   if vb.readArray(buf) == 37:
-    var nport = (cast[uint16](buf[35]) shl 8) or cast[uint16](buf[36])
+    var nport = (safeConvert[uint16](buf[35]) shl 8) or safeConvert[uint16](buf[36])
     s = Base32Lower.encode(buf.toOpenArray(0, 34))
     s.add(":")
     s.add($nport)
@@ -258,40 +293,27 @@ proc onion3VB(vb: var VBuffer): bool =
 
 proc unixStB(s: string, vb: var VBuffer): bool =
   ## Unix socket name stringToBuffer() implementation.
-  if len(s) > 0:
-    vb.writeSeq(s)
-    result = true
+  pathStringToBuffer(s, vb)
 
 proc unixBtS(vb: var VBuffer, s: var string): bool =
   ## Unix socket name bufferToString() implementation.
-  s = ""
-  if vb.readSeq(s) > 0:
-    result = true
+  pathBufferToString(vb, s)
 
 proc unixVB(vb: var VBuffer): bool =
   ## Unix socket name validateBuffer() implementation.
-  var s = ""
-  if vb.readSeq(s) > 0:
-    result = true
+  pathValidateBuffer(vb)
 
 proc dnsStB(s: string, vb: var VBuffer): bool =
   ## DNS name stringToBuffer() implementation.
-  if len(s) > 0:
-    vb.writeSeq(s)
-    result = true
+  pathStringToBuffer(s, vb)
 
 proc dnsBtS(vb: var VBuffer, s: var string): bool =
   ## DNS name bufferToString() implementation.
-  s = ""
-  if vb.readSeq(s) > 0:
-    result = true
+  pathBufferToStringNoSlash(vb, s)
 
 proc dnsVB(vb: var VBuffer): bool =
   ## DNS name validateBuffer() implementation.
-  var s = ""
-  if vb.readSeq(s) > 0:
-    if s.find('/') == -1:
-      result = true
+  pathValidateBufferNoSlash(vb)
 
 proc mapEq*(codec: string): MaPattern =
   ## ``Equal`` operator for pattern
@@ -309,149 +331,65 @@ proc mapAnd*(args: varargs[MaPattern]): MaPattern =
   result.args = @args
 
 const
-  TranscoderIP4* = Transcoder(
-    stringToBuffer: ip4StB,
-    bufferToString: ip4BtS,
-    validateBuffer: ip4VB
-  )
-  TranscoderIP6* = Transcoder(
-    stringToBuffer: ip6StB,
-    bufferToString: ip6BtS,
-    validateBuffer: ip6VB
-  )
+  TranscoderIP4* =
+    Transcoder(stringToBuffer: ip4StB, bufferToString: ip4BtS, validateBuffer: ip4VB)
+  TranscoderIP6* =
+    Transcoder(stringToBuffer: ip6StB, bufferToString: ip6BtS, validateBuffer: ip6VB)
   TranscoderIP6Zone* = Transcoder(
-    stringToBuffer: ip6zoneStB,
-    bufferToString: ip6zoneBtS,
-    validateBuffer: ip6zoneVB
-  )
-  TranscoderUnix* = Transcoder(
-    stringToBuffer: unixStB,
-    bufferToString: unixBtS,
-    validateBuffer: unixVB
-  )
-  TranscoderP2P* = Transcoder(
-    stringToBuffer: p2pStB,
-    bufferToString: p2pBtS,
-    validateBuffer: p2pVB
-  )
-  TranscoderPort* = Transcoder(
-    stringToBuffer: portStB,
-    bufferToString: portBtS,
-    validateBuffer: portVB
+    stringToBuffer: ip6zoneStB, bufferToString: ip6zoneBtS, validateBuffer: ip6zoneVB
   )
+  TranscoderUnix* =
+    Transcoder(stringToBuffer: unixStB, bufferToString: unixBtS, validateBuffer: unixVB)
+  TranscoderP2P* =
+    Transcoder(stringToBuffer: p2pStB, bufferToString: p2pBtS, validateBuffer: p2pVB)
+  TranscoderPort* =
+    Transcoder(stringToBuffer: portStB, bufferToString: portBtS, validateBuffer: portVB)
   TranscoderOnion* = Transcoder(
-    stringToBuffer: onionStB,
-    bufferToString: onionBtS,
-    validateBuffer: onionVB
+    stringToBuffer: onionStB, bufferToString: onionBtS, validateBuffer: onionVB
   )
   TranscoderOnion3* = Transcoder(
-    stringToBuffer: onion3StB,
-    bufferToString: onion3BtS,
-    validateBuffer: onion3VB
-  )
-  TranscoderDNS* = Transcoder(
-    stringToBuffer: dnsStB,
-    bufferToString: dnsBtS,
-    validateBuffer: dnsVB
+    stringToBuffer: onion3StB, bufferToString: onion3BtS, validateBuffer: onion3VB
   )
+  TranscoderDNS* =
+    Transcoder(stringToBuffer: dnsStB, bufferToString: dnsBtS, validateBuffer: dnsVB)
   ProtocolsList = [
+    MAProtocol(mcodec: multiCodec("ip4"), kind: Fixed, size: 4, coder: TranscoderIP4),
+    MAProtocol(mcodec: multiCodec("tcp"), kind: Fixed, size: 2, coder: TranscoderPort),
+    MAProtocol(mcodec: multiCodec("udp"), kind: Fixed, size: 2, coder: TranscoderPort),
+    MAProtocol(mcodec: multiCodec("ip6"), kind: Fixed, size: 16, coder: TranscoderIP6),
+    MAProtocol(mcodec: multiCodec("dccp"), kind: Fixed, size: 2, coder: TranscoderPort),
+    MAProtocol(mcodec: multiCodec("sctp"), kind: Fixed, size: 2, coder: TranscoderPort),
+    MAProtocol(mcodec: multiCodec("udt"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("utp"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("http"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("https"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("quic"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("quic-v1"), kind: Marker, size: 0),
     MAProtocol(
-      mcodec: multiCodec("ip4"), kind: Fixed, size: 4,
-      coder: TranscoderIP4
+      mcodec: multiCodec("ip6zone"), kind: Length, size: 0, coder: TranscoderIP6Zone
     ),
     MAProtocol(
-      mcodec: multiCodec("tcp"), kind: Fixed, size: 2,
-      coder: TranscoderPort
+      mcodec: multiCodec("onion"), kind: Fixed, size: 10, coder: TranscoderOnion
     ),
     MAProtocol(
-      mcodec: multiCodec("udp"), kind: Fixed, size: 2,
-      coder: TranscoderPort
+      mcodec: multiCodec("onion3"), kind: Fixed, size: 37, coder: TranscoderOnion3
     ),
+    MAProtocol(mcodec: multiCodec("ws"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("wss"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("tls"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("ipfs"), kind: Length, size: 0, coder: TranscoderP2P),
+    MAProtocol(mcodec: multiCodec("p2p"), kind: Length, size: 0, coder: TranscoderP2P),
+    MAProtocol(mcodec: multiCodec("unix"), kind: Path, size: 0, coder: TranscoderUnix),
+    MAProtocol(mcodec: multiCodec("dns"), kind: Length, size: 0, coder: TranscoderDNS),
+    MAProtocol(mcodec: multiCodec("dns4"), kind: Length, size: 0, coder: TranscoderDNS),
+    MAProtocol(mcodec: multiCodec("dns6"), kind: Length, size: 0, coder: TranscoderDNS),
     MAProtocol(
-      mcodec: multiCodec("ip6"), kind: Fixed, size: 16,
-      coder: TranscoderIP6
+      mcodec: multiCodec("dnsaddr"), kind: Length, size: 0, coder: TranscoderDNS
     ),
-    MAProtocol(
-      mcodec: multiCodec("dccp"), kind: Fixed, size: 2,
-      coder: TranscoderPort
-    ),
-    MAProtocol(
-      mcodec: multiCodec("sctp"), kind: Fixed, size: 2,
-      coder: TranscoderPort
-    ),
-    MAProtocol(
-      mcodec: multiCodec("udt"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("utp"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("http"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("https"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("quic"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("ip6zone"), kind: Length, size: 0,
-      coder: TranscoderIP6Zone
-    ),
-    MAProtocol(
-      mcodec: multiCodec("onion"), kind: Fixed, size: 10,
-      coder: TranscoderOnion
-    ),
-    MAProtocol(
-      mcodec: multiCodec("onion3"), kind: Fixed, size: 37,
-      coder: TranscoderOnion3
-    ),
-    MAProtocol(
-      mcodec: multiCodec("ws"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("wss"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("ipfs"), kind: Length, size: 0,
-      coder: TranscoderP2P
-    ),
-    MAProtocol(
-      mcodec: multiCodec("p2p"), kind: Length, size: 0,
-      coder: TranscoderP2P
-    ),
-    MAProtocol(
-      mcodec: multiCodec("unix"), kind: Path, size: 0,
-      coder: TranscoderUnix
-    ),
-    MAProtocol(
-      mcodec: multiCodec("dns"), kind: Length, size: 0,
-      coder: TranscoderDNS
-    ),
-    MAProtocol(
-      mcodec: multiCodec("dns4"), kind: Length, size: 0,
-      coder: TranscoderDNS
-    ),
-    MAProtocol(
-      mcodec: multiCodec("dns6"), kind: Length, size: 0,
-      coder: TranscoderDNS
-    ),
-    MAProtocol(
-      mcodec: multiCodec("dnsaddr"), kind: Length, size: 0,
-      coder: TranscoderDNS
-    ),
-    MAProtocol(
-      mcodec: multiCodec("p2p-circuit"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("p2p-websocket-star"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("p2p-webrtc-star"), kind: Marker, size: 0
-    ),
-    MAProtocol(
-      mcodec: multiCodec("p2p-webrtc-direct"), kind: Marker, size: 0
-    )
+    MAProtocol(mcodec: multiCodec("p2p-circuit"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("p2p-websocket-star"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("p2p-webrtc-star"), kind: Marker, size: 0),
+    MAProtocol(mcodec: multiCodec("p2p-webrtc-direct"), kind: Marker, size: 0),
   ]
 
   DNSANY* = mapEq("dns")
@@ -463,13 +401,24 @@ const
   DNS* = mapOr(DNSANY, DNS4, DNS6, DNSADDR)
   IP* = mapOr(IP4, IP6)
   DNS_OR_IP* = mapOr(DNS, IP)
-  TCP* = mapOr(mapAnd(DNS, mapEq("tcp")), mapAnd(IP, mapEq("tcp")))
-  UDP* = mapOr(mapAnd(DNS, mapEq("udp")), mapAnd(IP, mapEq("udp")))
+  TCP_DNS* = mapAnd(DNS, mapEq("tcp"))
+  TCP_IP* = mapAnd(IP, mapEq("tcp"))
+  TCP* = mapOr(TCP_DNS, TCP_IP)
+  UDP_DNS* = mapAnd(DNS, mapEq("udp"))
+  UDP_IP* = mapAnd(IP, mapEq("udp"))
+  UDP* = mapOr(UDP_DNS, UDP_IP)
   UTP* = mapAnd(UDP, mapEq("utp"))
   QUIC* = mapAnd(UDP, mapEq("quic"))
   UNIX* = mapEq("unix")
+  WS_DNS* = mapAnd(TCP_DNS, mapEq("ws"))
+  WS_IP* = mapAnd(TCP_IP, mapEq("ws"))
   WS* = mapAnd(TCP, mapEq("ws"))
-  WSS* = mapAnd(TCP, mapEq("wss"))
+  TLS_WS* = mapOr(mapEq("wss"), mapAnd(mapEq("tls"), mapEq("ws")))
+  WSS_DNS* = mapAnd(TCP_DNS, TLS_WS)
+  WSS_IP* = mapAnd(TCP_IP, TLS_WS)
+  WSS* = mapAnd(TCP, TLS_WS)
+  WebSockets_DNS* = mapOr(WS_DNS, WSS_DNS)
+  WebSockets_IP* = mapOr(WS_IP, WSS_IP)
   WebSockets* = mapOr(WS, WSS)
   Onion3* = mapEq("onion3")
   TcpOnion3* = mapAnd(TCP, Onion3)
@@ -483,31 +432,24 @@ const
   IPFS* = mapAnd(Reliable, P2PPattern)
 
   HTTP* = mapOr(
-    mapAnd(TCP, mapEq("http")),
-    mapAnd(IP, mapEq("http")),
-    mapAnd(DNS, mapEq("http"))
+    mapAnd(TCP, mapEq("http")), mapAnd(IP, mapEq("http")), mapAnd(DNS, mapEq("http"))
   )
 
   HTTPS* = mapOr(
-    mapAnd(TCP, mapEq("https")),
-    mapAnd(IP, mapEq("https")),
-    mapAnd(DNS, mapEq("https"))
+    mapAnd(TCP, mapEq("https")), mapAnd(IP, mapEq("https")), mapAnd(DNS, mapEq("https"))
   )
 
   WebRTCDirect* = mapOr(
-    mapAnd(HTTP, mapEq("p2p-webrtc-direct")),
-    mapAnd(HTTPS, mapEq("p2p-webrtc-direct"))
+    mapAnd(HTTP, mapEq("p2p-webrtc-direct")), mapAnd(HTTPS, mapEq("p2p-webrtc-direct"))
   )
 
   CircuitRelay* = mapEq("p2p-circuit")
 
-proc initMultiAddressCodeTable(): Table[MultiCodec,
-                                        MAProtocol] {.compileTime.} =
+proc initMultiAddressCodeTable(): Table[MultiCodec, MAProtocol] {.compileTime.} =
   for item in ProtocolsList:
     result[item.mcodec] = item
 
-const
-  CodeAddresses = initMultiAddressCodeTable()
+const CodeAddresses = initMultiAddressCodeTable()
 
 proc trimRight(s: string, ch: char): string =
   ## Consume trailing characters ``ch`` from string ``s`` and return result.
@@ -517,7 +459,7 @@ proc trimRight(s: string, ch: char): string =
       inc(m)
     else:
       break
-  result = s[0..(s.high - m)]
+  result = s[0 .. (s.high - m)]
 
 proc protoCode*(ma: MultiAddress): MaResult[MultiCodec] =
   ## Returns MultiAddress ``ma`` protocol code.
@@ -545,8 +487,7 @@ proc protoName*(ma: MultiAddress): MaResult[string] =
     else:
       ok($(proto.mcodec))
 
-proc protoArgument*(ma: MultiAddress,
-                    value: var openArray[byte]): MaResult[int] =
+proc protoArgument*(ma: MultiAddress, value: var openArray[byte]): MaResult[int] =
   ## Returns MultiAddress ``ma`` protocol argument value.
   ##
   ## If current MultiAddress do not have argument value, then result will be
@@ -565,7 +506,7 @@ proc protoArgument*(ma: MultiAddress,
       if proto.kind == Fixed:
         res = proto.size
         if len(value) >= res and
-          vb.data.readArray(value.toOpenArray(0, proto.size - 1)) != proto.size:
+            vb.data.readArray(value.toOpenArray(0, proto.size - 1)) != proto.size:
           err("multiaddress: Decoding protocol error")
         else:
           ok(res)
@@ -586,7 +527,7 @@ proc protoAddress*(ma: MultiAddress): MaResult[seq[byte]] =
   ## If current MultiAddress do not have argument value, then result array will
   ## be empty.
   var buffer = newSeq[byte](len(ma.data.buffer))
-  let res = ? protoArgument(ma, buffer)
+  let res = ?protoArgument(ma, buffer)
   buffer.setLen(res)
   ok(buffer)
 
@@ -605,7 +546,8 @@ proc getPart(ma: MultiAddress, index: int): MaResult[MultiAddress] =
   var res: MultiAddress
   res.data = initVBuffer()
 
-  if index < 0: return err("multiaddress: negative index gived to getPart")
+  if index < 0:
+    return err("multiaddress: negative index gived to getPart")
 
   while offset <= index:
     if vb.data.readVarint(header) == -1:
@@ -614,7 +556,6 @@ proc getPart(ma: MultiAddress, index: int): MaResult[MultiAddress] =
     let proto = CodeAddresses.getOrDefault(MultiCodec(header))
     if proto.kind == None:
       return err("multiaddress: Unsupported protocol '" & $header & "'")
-
     elif proto.kind == Fixed:
       data.setLen(proto.size)
       if vb.data.readArray(data) != proto.size:
@@ -641,22 +582,27 @@ proc getPart(ma: MultiAddress, index: int): MaResult[MultiAddress] =
 
 proc getParts[U, V](ma: MultiAddress, slice: HSlice[U, V]): MaResult[MultiAddress] =
   when slice.a is BackwardsIndex or slice.b is BackwardsIndex:
-    let maLength = ? len(ma)
+    let maLength = ?len(ma)
   template normalizeIndex(index): int =
-    when index is BackwardsIndex: maLength - int(index)
-    else: int(index)
+    when index is BackwardsIndex:
+      maLength - int(index)
+    else:
+      int(index)
+
   let
     indexStart = normalizeIndex(slice.a)
     indexEnd = normalizeIndex(slice.b)
   var res: MultiAddress
-  for i in indexStart..indexEnd:
-    ? res.append(? ma[i])
+  for i in indexStart .. indexEnd:
+    ?res.append(?ma[i])
   ok(res)
 
-proc `[]`*(ma: MultiAddress, i: int | BackwardsIndex): MaResult[MultiAddress] {.inline.} =
+proc `[]`*(
+    ma: MultiAddress, i: int | BackwardsIndex
+): MaResult[MultiAddress] {.inline.} =
   ## Returns part with index ``i`` of MultiAddress ``ma``.
   when i is BackwardsIndex:
-    let maLength = ? len(ma)
+    let maLength = ?len(ma)
     ma.getPart(maLength - int(i))
   else:
     ma.getPart(i)
@@ -680,9 +626,7 @@ iterator items*(ma: MultiAddress): MaResult[MultiAddress] =
 
     let proto = CodeAddresses.getOrDefault(MultiCodec(header))
     if proto.kind == None:
-      yield err(MaResult[MultiAddress], "Unsupported protocol '" &
-                $header & "'")
-
+      yield err(MaResult[MultiAddress], "Unsupported protocol '" & $header & "'")
     elif proto.kind == Fixed:
       data.setLen(proto.size)
       if vb.data.readArray(data) != proto.size:
@@ -704,7 +648,8 @@ iterator items*(ma: MultiAddress): MaResult[MultiAddress] =
 proc len*(ma: MultiAddress): MaResult[int] =
   var counter: int
   for part in ma:
-    if part.isErr: return err(part.error)
+    if part.isErr:
+      return err(part.error)
     counter.inc()
   ok(counter)
 
@@ -717,8 +662,7 @@ proc contains*(ma: MultiAddress, codec: MultiCodec): MaResult[bool] {.inline.} =
       return ok(true)
   ok(false)
 
-proc `[]`*(ma: MultiAddress,
-           codec: MultiCodec): MaResult[MultiAddress] {.inline.} =
+proc `[]`*(ma: MultiAddress, codec: MultiCodec): MaResult[MultiAddress] {.inline.} =
   ## Returns partial MultiAddress with MultiCodec ``codec`` and present in
   ## MultiAddress ``ma``.
   for item in ma.items:
@@ -743,13 +687,12 @@ proc toString*(value: MultiAddress): MaResult[string] =
       return err("multiaddress: Unsupported protocol '" & $header & "'")
     if proto.kind in {Fixed, Length, Path}:
       if isNil(proto.coder.bufferToString):
-        return err("multiaddress: Missing protocol '" & $(proto.mcodec) &
-                   "' coder")
+        return err("multiaddress: Missing protocol '" & $(proto.mcodec) & "' coder")
       if not proto.coder.bufferToString(vb.data, part):
         return err("multiaddress: Decoding protocol error")
       parts.add($(proto.mcodec))
-      if proto.kind == Path and part[0] == '/':
-        parts.add(part[1..^1])
+      if len(part) > 0 and (proto.kind == Path) and (part[0] == '/'):
+        parts.add(part[1 ..^ 1])
       else:
         parts.add(part)
     elif proto.kind == Marker:
@@ -758,11 +701,13 @@ proc toString*(value: MultiAddress): MaResult[string] =
     res = "/" & parts.join("/")
   ok(res)
 
-proc `$`*(value: MultiAddress): string {.raises: [Defect].} =
+proc `$`*(value: MultiAddress): string =
   ## Return string representation of MultiAddress ``value``.
   let s = value.toString()
-  if s.isErr: s.error
-  else: s[]
+  if s.isErr:
+    s.error
+  else:
+    s[]
 
 proc protocols*(value: MultiAddress): MaResult[seq[MultiCodec]] =
   ## Returns list of protocol codecs inside of MultiAddress ``value``.
@@ -779,8 +724,9 @@ proc write*(vb: var VBuffer, ma: MultiAddress) {.inline.} =
   ## Write MultiAddress value ``ma`` to buffer ``vb``.
   vb.writeArray(ma.data.buffer)
 
-proc encode*(mbtype: typedesc[MultiBase], encoding: string,
-             ma: MultiAddress): string {.inline.} =
+proc encode*(
+    mbtype: typedesc[MultiBase], encoding: string, ma: MultiAddress
+): string {.inline.} =
   ## Get MultiBase encoded representation of ``ma`` using encoding
   ## ``encoding``.
   result = MultiBase.encode(encoding, ma.data.buffer)
@@ -807,8 +753,8 @@ proc validate*(ma: MultiAddress): bool =
   result = true
 
 proc init*(
-    mtype: typedesc[MultiAddress], protocol: MultiCodec,
-    value: openArray[byte] = []): MaResult[MultiAddress] =
+    mtype: typedesc[MultiAddress], protocol: MultiCodec, value: openArray[byte] = []
+): MaResult[MultiAddress] =
   ## Initialize MultiAddress object from protocol id ``protocol`` and array
   ## of bytes ``value``.
   let proto = CodeAddresses.getOrDefault(protocol)
@@ -838,19 +784,21 @@ proc init*(
     of None:
       raiseAssert "None checked above"
 
-proc init*(mtype: typedesc[MultiAddress], protocol: MultiCodec,
-           value: PeerId): MaResult[MultiAddress] {.inline.} =
+proc init*(
+    mtype: typedesc[MultiAddress], protocol: MultiCodec, value: PeerId
+): MaResult[MultiAddress] {.inline.} =
   ## Initialize MultiAddress object from protocol id ``protocol`` and peer id
   ## ``value``.
   init(mtype, protocol, value.data)
 
-proc init*(mtype: typedesc[MultiAddress], protocol: MultiCodec,
-           value: int): MaResult[MultiAddress] =
+proc init*(
+    mtype: typedesc[MultiAddress], protocol: MultiCodec, value: int
+): MaResult[MultiAddress] =
   ## Initialize MultiAddress object from protocol id ``protocol`` and integer
   ## ``value``. This procedure can be used to instantiate ``tcp``, ``udp``,
   ## ``dccp`` and ``sctp`` MultiAddresses.
-  var allowed = [multiCodec("tcp"), multiCodec("udp"), multiCodec("dccp"),
-                 multiCodec("sctp")]
+  var allowed =
+    [multiCodec("tcp"), multiCodec("udp"), multiCodec("dccp"), multiCodec("sctp")]
   if protocol notin allowed:
     err("multiaddress: Incorrect protocol for integer value")
   else:
@@ -870,9 +818,10 @@ proc getProtocol(name: string): MAProtocol {.inline.} =
   if mc != InvalidMultiCodec:
     result = CodeAddresses.getOrDefault(mc)
 
-proc init*(mtype: typedesc[MultiAddress],
-           value: string): MaResult[MultiAddress] =
+proc init*(mtype: typedesc[MultiAddress], value: string): MaResult[MultiAddress] =
   ## Initialize MultiAddress object from string representation ``value``.
+  if len(value) == 0 or value == "/":
+    return err("multiaddress: Address must not be empty!")
   var parts = value.trimRight('/').split('/')
   if len(parts[0]) != 0:
     err("multiaddress: Invalid MultiAddress, must start with `/`")
@@ -888,8 +837,7 @@ proc init*(mtype: typedesc[MultiAddress],
       else:
         if proto.kind in {Fixed, Length, Path}:
           if isNil(proto.coder.stringToBuffer):
-            return err("multiaddress: Missing protocol '" &
-                        part & "' transcoder")
+            return err("multiaddress: Missing protocol '" & part & "' transcoder")
 
           if offset + 1 >= len(parts):
             return err("multiaddress: Missing protocol '" & part & "' argument")
@@ -898,16 +846,15 @@ proc init*(mtype: typedesc[MultiAddress],
           res.data.write(proto.mcodec)
           let res = proto.coder.stringToBuffer(parts[offset + 1], res.data)
           if not res:
-            return err("multiaddress: Error encoding `" & part & "/" &
-                       parts[offset + 1] & "`")
+            return err(
+              "multiaddress: Error encoding `" & part & "/" & parts[offset + 1] & "`"
+            )
           offset += 2
-
         elif proto.kind == Path:
-          var path = "/" & (parts[(offset + 1)..^1].join("/"))
+          var path = "/" & (parts[(offset + 1) ..^ 1].join("/"))
           res.data.write(proto.mcodec)
           if not proto.coder.stringToBuffer(path, res.data):
-            return err("multiaddress: Error encoding `" & part & "/" &
-                       path & "`")
+            return err("multiaddress: Error encoding `" & part & "/" & path & "`")
 
           break
         elif proto.kind == Marker:
@@ -916,11 +863,12 @@ proc init*(mtype: typedesc[MultiAddress],
     res.data.finish()
     ok(res)
 
-proc init*(mtype: typedesc[MultiAddress],
-           data: openArray[byte]): MaResult[MultiAddress] =
+proc init*(
+    mtype: typedesc[MultiAddress], data: openArray[byte]
+): MaResult[MultiAddress] =
   ## Initialize MultiAddress with array of bytes ``data``.
   if len(data) == 0:
-    err("multiaddress: Address could not be empty!")
+    err("multiaddress: Address must not be empty!")
   else:
     var res: MultiAddress
     res.data = initVBuffer()
@@ -935,38 +883,55 @@ proc init*(mtype: typedesc[MultiAddress]): MultiAddress =
   ## Initialize empty MultiAddress.
   result.data = initVBuffer()
 
-proc init*(mtype: typedesc[MultiAddress], address: ValidIpAddress,
-           protocol: IpTransportProtocol, port: Port): MultiAddress =
+proc init*(
+    mtype: typedesc[MultiAddress],
+    address: IpAddress,
+    protocol: IpTransportProtocol,
+    port: Port,
+): MultiAddress =
   var res: MultiAddress
   res.data = initVBuffer()
   let
-    networkProto = case address.family
-      of IpAddressFamily.IPv4: getProtocol("ip4")
-      of IpAddressFamily.IPv6: getProtocol("ip6")
+    networkProto =
+      case address.family
+      of IpAddressFamily.IPv4:
+        getProtocol("ip4")
+      of IpAddressFamily.IPv6:
+        getProtocol("ip6")
 
-    transportProto = case protocol
-      of tcpProtocol: getProtocol("tcp")
-      of udpProtocol: getProtocol("udp")
+    transportProto =
+      case protocol
+      of tcpProtocol:
+        getProtocol("tcp")
+      of udpProtocol:
+        getProtocol("udp")
 
   res.data.write(networkProto.mcodec)
   case address.family
-    of IpAddressFamily.IPv4: res.data.writeArray(address.address_v4)
-    of IpAddressFamily.IPv6: res.data.writeArray(address.address_v6)
+  of IpAddressFamily.IPv4:
+    res.data.writeArray(address.address_v4)
+  of IpAddressFamily.IPv6:
+    res.data.writeArray(address.address_v6)
   res.data.write(transportProto.mcodec)
   res.data.writeArray(toBytesBE(uint16(port)))
   res.data.finish()
   res
 
-proc init*(mtype: typedesc[MultiAddress], address: TransportAddress,
-           protocol = IPPROTO_TCP): MaResult[MultiAddress] =
+proc init*(
+    mtype: typedesc[MultiAddress], address: TransportAddress, protocol = IPPROTO_TCP
+): MaResult[MultiAddress] =
   ## Initialize MultiAddress using chronos.TransportAddress (IPv4/IPv6/Unix)
   ## and protocol information (UDP/TCP).
   var res: MultiAddress
   res.data = initVBuffer()
-  let protoProto = case protocol
-                   of IPPROTO_TCP: getProtocol("tcp")
-                   of IPPROTO_UDP: getProtocol("udp")
-                   else: default(MAProtocol)
+  let protoProto =
+    case protocol
+    of IPPROTO_TCP:
+      getProtocol("tcp")
+    of IPPROTO_UDP:
+      getProtocol("udp")
+    else:
+      default(MAProtocol)
   if protoProto.size == 0:
     return err("multiaddress: protocol should be either TCP or UDP")
   if address.family == AddressFamily.IPv4:
@@ -1005,8 +970,7 @@ proc append*(m1: var MultiAddress, m2: MultiAddress): MaResult[void] =
   else:
     ok()
 
-proc `&`*(m1, m2: MultiAddress): MultiAddress {.
-     raises: [Defect, LPError].} =
+proc `&`*(m1, m2: MultiAddress): MultiAddress {.raises: [LPError].} =
   ## Concatenates two addresses ``m1`` and ``m2``, and returns result.
   ##
   ## This procedure performs validation of concatenated result and can raise
@@ -1015,8 +979,7 @@ proc `&`*(m1, m2: MultiAddress): MultiAddress {.
 
   concat(m1, m2).tryGet()
 
-proc `&=`*(m1: var MultiAddress, m2: MultiAddress) {.
-     raises: [Defect, LPError].} =
+proc `&=`*(m1: var MultiAddress, m2: MultiAddress) {.raises: [LPError].} =
   ## Concatenates two addresses ``m1`` and ``m2``.
   ##
   ## This procedure performs validation of concatenated result and can raise
@@ -1038,13 +1001,12 @@ proc matchPart(pat: MaPattern, protos: seq[MultiCodec]): MaPatResult =
       let res = a.matchPart(pcs)
       if res.flag:
         #Greedy Or
-        if result.flag == false or
-             result.rem.len > res.rem.len:
+        if result.flag == false or result.rem.len > res.rem.len:
           result = res
   elif pat.operator == And:
     if len(pcs) < len(pat.args):
       return MaPatResult(flag: false, rem: empty)
-    for i in 0..<len(pat.args):
+    for i in 0 ..< len(pat.args):
       let res = pat.args[i].matchPart(pcs)
       if not res.flag:
         return MaPatResult(flag: false, rem: res.rem)
@@ -1054,25 +1016,23 @@ proc matchPart(pat: MaPattern, protos: seq[MultiCodec]): MaPatResult =
     if len(pcs) == 0:
       return MaPatResult(flag: false, rem: empty)
     if pcs[0] == pat.value:
-      return MaPatResult(flag: true, rem: pcs[1..^1])
+      return MaPatResult(flag: true, rem: pcs[1 ..^ 1])
     result = MaPatResult(flag: false, rem: empty)
 
 proc match*(pat: MaPattern, address: MultiAddress): bool =
   ## Match full ``address`` using pattern ``pat`` and return ``true`` if
   ## ``address`` satisfies pattern.
-  let protos = address.protocols()
-  if protos.isErr():
+  let protos = address.protocols().valueOr:
     return false
-  let res = matchPart(pat, protos.get())
+  let res = matchPart(pat, protos)
   res.flag and (len(res.rem) == 0)
 
 proc matchPartial*(pat: MaPattern, address: MultiAddress): bool =
   ## Match prefix part of ``address`` using pattern ``pat`` and return
   ## ``true`` if ``address`` starts with pattern.
-  let protos = address.protocols()
-  if protos.isErr():
+  let protos = address.protocols().valueOr:
     return false
-  let res = matchPart(pat, protos.get())
+  let res = matchPart(pat, protos)
   res.flag
 
 proc `$`*(pat: MaPattern): string =
@@ -1093,35 +1053,41 @@ proc bytes*(value: MultiAddress): seq[byte] =
 proc write*(pb: var ProtoBuffer, field: int, value: MultiAddress) {.inline.} =
   write(pb, field, value.data.buffer)
 
-proc getField*(pb: ProtoBuffer, field: int,
-               value: var MultiAddress): ProtoResult[bool] {.
-     inline.} =
+proc getField*(
+    pb: ProtoBuffer, field: int, value: var MultiAddress
+): ProtoResult[bool] {.inline.} =
   var buffer: seq[byte]
-  let res = ? pb.getField(field, buffer)
-  if not(res):
+  let res = ?pb.getField(field, buffer)
+  if not (res):
     ok(false)
   else:
-    let ma = MultiAddress.init(buffer)
-    if ma.isOk():
-      value = ma.get()
-      ok(true)
-    else:
-      err(ProtoError.IncorrectBlob)
+    value = MultiAddress.init(buffer).valueOr:
+      return err(ProtoError.IncorrectBlob)
+    ok(true)
 
-proc getRepeatedField*(pb: ProtoBuffer, field: int,
-                       value: var seq[MultiAddress]): ProtoResult[bool] {.
-     inline.} =
+proc getRepeatedField*(
+    pb: ProtoBuffer, field: int, value: var seq[MultiAddress]
+): ProtoResult[bool] {.inline.} =
+  ## Read repeated field from protobuf message. ``field`` is field number.
+  ## If the message is malformed, an error is returned. If field is not present
+  ## in message, then ``ok(false)`` is returned and value is empty. If field is
+  ## present, but no items could be parsed, then
+  ## ``err(ProtoError.IncorrectBlob)`` is returned and value is empty.
+  ## If field is present and some item could be parsed, then ``true`` is
+  ## returned and value contains the parsed values.
   var items: seq[seq[byte]]
   value.setLen(0)
-  let res = ? pb.getRepeatedField(field, items)
-  if not(res):
+  let res = ?pb.getRepeatedField(field, items)
+  if not (res):
     ok(false)
   else:
     for item in items:
-      let ma = MultiAddress.init(item)
-      if ma.isOk():
-        value.add(ma.get())
-      else:
-        value.setLen(0)
-        return err(ProtoError.IncorrectBlob)
-    ok(true)
+      let ma = MultiAddress.init(item).valueOr:
+        debug "Unsupported MultiAddress in blob", ma = item
+        continue
+
+      value.add(ma)
+    if value.len == 0:
+      err(ProtoError.IncorrectBlob)
+    else:
+      ok(true)

libp2p/multibase.nim

@@ -13,36 +13,39 @@
 ## 1. base32z
 ##
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables
 import stew/[base32, base58, base64, results]
 
 type
   MultiBaseStatus* {.pure.} = enum
-    Error, Success, Overrun, Incorrect, BadCodec, NotSupported
+    Error
+    Success
+    Overrun
+    Incorrect
+    BadCodec
+    NotSupported
 
   MultiBase* = object
 
-  MBCodeSize = proc(length: int): int {.nimcall, gcsafe, noSideEffect, raises: [Defect].}
+  MBCodeSize = proc(length: int): int {.nimcall, gcsafe, noSideEffect, raises: [].}
 
   MBCodec = object
     code: char
     name: string
-    encr: proc(inbytes: openArray[byte],
-               outbytes: var openArray[char],
-               outlen: var int): MultiBaseStatus {.nimcall, gcsafe, noSideEffect, raises: [Defect].}
-    decr: proc(inbytes: openArray[char],
-               outbytes: var openArray[byte],
-               outlen: var int): MultiBaseStatus {.nimcall, gcsafe, noSideEffect, raises: [Defect].}
+    encr: proc(
+      inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+    ): MultiBaseStatus {.nimcall, gcsafe, noSideEffect, raises: [].}
+    decr: proc(
+      inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+    ): MultiBaseStatus {.nimcall, gcsafe, noSideEffect, raises: [].}
     encl: MBCodeSize
     decl: MBCodeSize
 
-proc idd(inbytes: openArray[char], outbytes: var openArray[byte],
-         outlen: var int): MultiBaseStatus =
+proc idd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   let length = len(inbytes)
   if length > len(outbytes):
     outlen = length
@@ -52,9 +55,9 @@ proc idd(inbytes: openArray[char], outbytes: var openArray[byte],
     outlen = length
     result = MultiBaseStatus.Success
 
-proc ide(inbytes: openArray[byte],
-         outbytes: var openArray[char],
-         outlen: var int): MultiBaseStatus =
+proc ide(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   let length = len(inbytes)
   if length > len(outbytes):
     outlen = length
@@ -64,31 +67,37 @@ proc ide(inbytes: openArray[byte],
     outlen = length
     result = MultiBaseStatus.Success
 
-proc idel(length: int): int = length
-proc iddl(length: int): int = length
+proc idel(length: int): int =
+  length
 
-proc b16d(inbytes: openArray[char],
-          outbytes: var openArray[byte],
-          outlen: var int): MultiBaseStatus =
+proc iddl(length: int): int =
+  length
+
+proc b16d(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   discard
 
-proc b16e(inbytes: openArray[byte],
-          outbytes: var openArray[char],
-          outlen: var int): MultiBaseStatus =
+proc b16e(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   discard
 
-proc b16ud(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b16ud(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   discard
 
-proc b16ue(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b16ue(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   discard
 
-proc b16el(length: int): int = length shl 1
-proc b16dl(length: int): int = (length + 1) div 2
+proc b16el(length: int): int =
+  length shl 1
+
+proc b16dl(length: int): int =
+  (length + 1) div 2
 
 proc b32ce(r: Base32Status): MultiBaseStatus {.inline.} =
   result = MultiBaseStatus.Error
@@ -117,218 +126,253 @@ proc b64ce(r: Base64Status): MultiBaseStatus {.inline.} =
   elif r == Base64Status.Success:
     result = MultiBaseStatus.Success
 
-proc b32hd(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b32hd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32Lower.decode(inbytes, outbytes, outlen))
 
-proc b32he(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b32he(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32Lower.encode(inbytes, outbytes, outlen))
 
-proc b32hud(inbytes: openArray[char],
-            outbytes: var openArray[byte],
-            outlen: var int): MultiBaseStatus =
+proc b32hud(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32Upper.decode(inbytes, outbytes, outlen))
 
-proc b32hue(inbytes: openArray[byte],
-            outbytes: var openArray[char],
-            outlen: var int): MultiBaseStatus =
+proc b32hue(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32Upper.encode(inbytes, outbytes, outlen))
 
-proc b32hpd(inbytes: openArray[char],
-            outbytes: var openArray[byte],
-            outlen: var int): MultiBaseStatus =
+proc b32hpd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32LowerPad.decode(inbytes, outbytes, outlen))
 
-proc b32hpe(inbytes: openArray[byte],
-            outbytes: var openArray[char],
-            outlen: var int): MultiBaseStatus =
+proc b32hpe(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32LowerPad.encode(inbytes, outbytes, outlen))
 
-proc b32hpud(inbytes: openArray[char],
-             outbytes: var openArray[byte],
-             outlen: var int): MultiBaseStatus =
+proc b32hpud(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32UpperPad.decode(inbytes, outbytes, outlen))
 
-proc b32hpue(inbytes: openArray[byte],
-             outbytes: var openArray[char],
-             outlen: var int): MultiBaseStatus =
+proc b32hpue(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(HexBase32UpperPad.encode(inbytes, outbytes, outlen))
 
-proc b32d(inbytes: openArray[char],
-          outbytes: var openArray[byte],
-          outlen: var int): MultiBaseStatus =
+proc b32d(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32Lower.decode(inbytes, outbytes, outlen))
 
-proc b32e(inbytes: openArray[byte],
-          outbytes: var openArray[char],
-          outlen: var int): MultiBaseStatus =
+proc b32e(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32Lower.encode(inbytes, outbytes, outlen))
 
-proc b32ud(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b32ud(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32Upper.decode(inbytes, outbytes, outlen))
 
-proc b32ue(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b32ue(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32Upper.encode(inbytes, outbytes, outlen))
 
-proc b32pd(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b32pd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32LowerPad.decode(inbytes, outbytes, outlen))
 
-proc b32pe(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b32pe(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32LowerPad.encode(inbytes, outbytes, outlen))
 
-proc b32pud(inbytes: openArray[char],
-            outbytes: var openArray[byte],
-            outlen: var int): MultiBaseStatus =
+proc b32pud(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32UpperPad.decode(inbytes, outbytes, outlen))
 
-proc b32pue(inbytes: openArray[byte],
-            outbytes: var openArray[char],
-            outlen: var int): MultiBaseStatus =
+proc b32pue(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b32ce(Base32UpperPad.encode(inbytes, outbytes, outlen))
 
-proc b32el(length: int): int = Base32Lower.encodedLength(length)
-proc b32dl(length: int): int = Base32Lower.decodedLength(length)
-proc b32pel(length: int): int = Base32LowerPad.encodedLength(length)
-proc b32pdl(length: int): int = Base32LowerPad.decodedLength(length)
+proc b32el(length: int): int =
+  Base32Lower.encodedLength(length)
 
-proc b58fd(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b32dl(length: int): int =
+  Base32Lower.decodedLength(length)
+
+proc b32pel(length: int): int =
+  Base32LowerPad.encodedLength(length)
+
+proc b32pdl(length: int): int =
+  Base32LowerPad.decodedLength(length)
+
+proc b58fd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b58ce(FLCBase58.decode(inbytes, outbytes, outlen))
 
-proc b58fe(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b58fe(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b58ce(FLCBase58.encode(inbytes, outbytes, outlen))
 
-proc b58bd(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b58bd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b58ce(BTCBase58.decode(inbytes, outbytes, outlen))
 
-proc b58be(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b58be(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b58ce(BTCBase58.encode(inbytes, outbytes, outlen))
 
-proc b58el(length: int): int = Base58.encodedLength(length)
-proc b58dl(length: int): int = Base58.decodedLength(length)
+proc b58el(length: int): int =
+  Base58.encodedLength(length)
 
-proc b64el(length: int): int = Base64.encodedLength(length)
-proc b64dl(length: int): int = Base64.decodedLength(length)
-proc b64pel(length: int): int = Base64Pad.encodedLength(length)
-proc b64pdl(length: int): int = Base64Pad.decodedLength(length)
+proc b58dl(length: int): int =
+  Base58.decodedLength(length)
 
-proc b64e(inbytes: openArray[byte],
-          outbytes: var openArray[char],
-          outlen: var int): MultiBaseStatus =
+proc b64el(length: int): int =
+  Base64.encodedLength(length)
+
+proc b64dl(length: int): int =
+  Base64.decodedLength(length)
+
+proc b64pel(length: int): int =
+  Base64Pad.encodedLength(length)
+
+proc b64pdl(length: int): int =
+  Base64Pad.decodedLength(length)
+
+proc b64e(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64.encode(inbytes, outbytes, outlen))
 
-proc b64d(inbytes: openArray[char],
-          outbytes: var openArray[byte],
-          outlen: var int): MultiBaseStatus =
+proc b64d(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64.decode(inbytes, outbytes, outlen))
 
-proc b64pe(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b64pe(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64Pad.encode(inbytes, outbytes, outlen))
 
-proc b64pd(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b64pd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64Pad.decode(inbytes, outbytes, outlen))
 
-proc b64ue(inbytes: openArray[byte],
-           outbytes: var openArray[char],
-           outlen: var int): MultiBaseStatus =
+proc b64ue(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64Url.encode(inbytes, outbytes, outlen))
 
-proc b64ud(inbytes: openArray[char],
-           outbytes: var openArray[byte],
-           outlen: var int): MultiBaseStatus =
+proc b64ud(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64Url.decode(inbytes, outbytes, outlen))
 
-proc b64upe(inbytes: openArray[byte],
-          outbytes: var openArray[char],
-          outlen: var int): MultiBaseStatus =
+proc b64upe(
+    inbytes: openArray[byte], outbytes: var openArray[char], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64UrlPad.encode(inbytes, outbytes, outlen))
 
-proc b64upd(inbytes: openArray[char],
-            outbytes: var openArray[byte],
-            outlen: var int): MultiBaseStatus =
+proc b64upd(
+    inbytes: openArray[char], outbytes: var openArray[byte], outlen: var int
+): MultiBaseStatus =
   result = b64ce(Base64UrlPad.decode(inbytes, outbytes, outlen))
 
-const
-  MultiBaseCodecs = [
-    MBCodec(name: "identity", code: chr(0x00),
-      decr: idd, encr: ide, decl: iddl, encl: idel
-    ),
-    MBCodec(name: "base1", code: '1'),
-    MBCodec(name: "base2", code: '0'),
-    MBCodec(name: "base8", code: '7'),
-    MBCodec(name: "base10", code: '9'),
-    MBCodec(name: "base16", code: 'f',
-      decr: b16d, encr: b16e, decl: b16dl, encl: b16el
-    ),
-    MBCodec(name: "base16upper", code: 'F',
-      decr: b16ud, encr: b16ue, decl: b16dl, encl: b16el
-    ),
-    MBCodec(name: "base32hex", code: 'v',
-      decr: b32hd, encr: b32he, decl: b32dl, encl: b32el
-    ),
-    MBCodec(name: "base32hexupper", code: 'V',
-      decr: b32hud, encr: b32hue, decl: b32dl, encl: b32el
-    ),
-    MBCodec(name: "base32hexpad", code: 't',
-      decr: b32hpd, encr: b32hpe, decl: b32pdl, encl: b32pel
-    ),
-    MBCodec(name: "base32hexpadupper", code: 'T',
-      decr: b32hpud, encr: b32hpue, decl: b32pdl, encl: b32pel
-    ),
-    MBCodec(name: "base32", code: 'b',
-      decr: b32d, encr: b32e, decl: b32dl, encl: b32el
-    ),
-    MBCodec(name: "base32upper", code: 'B',
-      decr: b32ud, encr: b32ue, decl: b32dl, encl: b32el
-    ),
-    MBCodec(name: "base32pad", code: 'c',
-      decr: b32pd, encr: b32pe, decl: b32pdl, encl: b32pel
-    ),
-    MBCodec(name: "base32padupper", code: 'C',
-      decr: b32pud, encr: b32pue, decl: b32pdl, encl: b32pel
-    ),
-    MBCodec(name: "base32z", code: 'h'),
-    MBCodec(name: "base58flickr", code: 'Z',
-      decr: b58fd, encr: b58fe, decl: b58dl, encl: b58el
-    ),
-    MBCodec(name: "base58btc", code: 'z',
-      decr: b58bd, encr: b58be, decl: b58dl, encl: b58el
-    ),
-    MBCodec(name: "base64", code: 'm',
-      decr: b64d, encr: b64e, decl: b64dl, encl: b64el
-    ),
-    MBCodec(name: "base64pad", code: 'M',
-      decr: b64pd, encr: b64pe, decl: b64pdl, encl: b64pel
-    ),
-    MBCodec(name: "base64url", code: 'u',
-      decr: b64ud, encr: b64ue, decl: b64dl, encl: b64el
-    ),
-    MBCodec(name: "base64urlpad", code: 'U',
-      decr: b64upd, encr: b64upe, decl: b64pdl, encl: b64pel
-    )
-  ]
+const MultiBaseCodecs = [
+  MBCodec(
+    name: "identity", code: chr(0x00), decr: idd, encr: ide, decl: iddl, encl: idel
+  ),
+  MBCodec(name: "base1", code: '1'),
+  MBCodec(name: "base2", code: '0'),
+  MBCodec(name: "base8", code: '7'),
+  MBCodec(name: "base10", code: '9'),
+  MBCodec(name: "base16", code: 'f', decr: b16d, encr: b16e, decl: b16dl, encl: b16el),
+  MBCodec(
+    name: "base16upper", code: 'F', decr: b16ud, encr: b16ue, decl: b16dl, encl: b16el
+  ),
+  MBCodec(
+    name: "base32hex", code: 'v', decr: b32hd, encr: b32he, decl: b32dl, encl: b32el
+  ),
+  MBCodec(
+    name: "base32hexupper",
+    code: 'V',
+    decr: b32hud,
+    encr: b32hue,
+    decl: b32dl,
+    encl: b32el,
+  ),
+  MBCodec(
+    name: "base32hexpad",
+    code: 't',
+    decr: b32hpd,
+    encr: b32hpe,
+    decl: b32pdl,
+    encl: b32pel,
+  ),
+  MBCodec(
+    name: "base32hexpadupper",
+    code: 'T',
+    decr: b32hpud,
+    encr: b32hpue,
+    decl: b32pdl,
+    encl: b32pel,
+  ),
+  MBCodec(name: "base32", code: 'b', decr: b32d, encr: b32e, decl: b32dl, encl: b32el),
+  MBCodec(
+    name: "base32upper", code: 'B', decr: b32ud, encr: b32ue, decl: b32dl, encl: b32el
+  ),
+  MBCodec(
+    name: "base32pad", code: 'c', decr: b32pd, encr: b32pe, decl: b32pdl, encl: b32pel
+  ),
+  MBCodec(
+    name: "base32padupper",
+    code: 'C',
+    decr: b32pud,
+    encr: b32pue,
+    decl: b32pdl,
+    encl: b32pel,
+  ),
+  MBCodec(name: "base32z", code: 'h'),
+  MBCodec(
+    name: "base58flickr", code: 'Z', decr: b58fd, encr: b58fe, decl: b58dl, encl: b58el
+  ),
+  MBCodec(
+    name: "base58btc", code: 'z', decr: b58bd, encr: b58be, decl: b58dl, encl: b58el
+  ),
+  MBCodec(name: "base64", code: 'm', decr: b64d, encr: b64e, decl: b64dl, encl: b64el),
+  MBCodec(
+    name: "base64pad", code: 'M', decr: b64pd, encr: b64pe, decl: b64pdl, encl: b64pel
+  ),
+  MBCodec(
+    name: "base64url", code: 'u', decr: b64ud, encr: b64ue, decl: b64dl, encl: b64el
+  ),
+  MBCodec(
+    name: "base64urlpad",
+    code: 'U',
+    decr: b64upd,
+    encr: b64upe,
+    decl: b64pdl,
+    encl: b64pel,
+  ),
+]
 
 proc initMultiBaseCodeTable(): Table[char, MBCodec] {.compileTime.} =
   for item in MultiBaseCodecs:
@@ -342,8 +386,7 @@ const
   CodeMultiBases = initMultiBaseCodeTable()
   NameMultiBases = initMultiBaseNameTable()
 
-proc encodedLength*(mbtype: typedesc[MultiBase], encoding: string,
-                    length: int): int =
+proc encodedLength*(mbtype: typedesc[MultiBase], encoding: string, length: int): int =
   ## Return estimated size of buffer to store MultiBase encoded value with
   ## encoding ``encoding`` of length ``length``.
   ##
@@ -358,8 +401,7 @@ proc encodedLength*(mbtype: typedesc[MultiBase], encoding: string,
     else:
       result = mb.encl(length) + 1
 
-proc decodedLength*(mbtype: typedesc[MultiBase], encoding: char,
-                    length: int): int =
+proc decodedLength*(mbtype: typedesc[MultiBase], encoding: char, length: int): int =
   ## Return estimated size of buffer to store MultiBase decoded value with
   ## encoding character ``encoding`` of length ``length``.
   let mb = CodeMultiBases.getOrDefault(encoding)
@@ -371,9 +413,13 @@ proc decodedLength*(mbtype: typedesc[MultiBase], encoding: char,
     else:
       result = mb.decl(length - 1)
 
-proc encode*(mbtype: typedesc[MultiBase], encoding: string,
-             inbytes: openArray[byte], outbytes: var openArray[char],
-             outlen: var int): MultiBaseStatus =
+proc encode*(
+    mbtype: typedesc[MultiBase],
+    encoding: string,
+    inbytes: openArray[byte],
+    outbytes: var openArray[char],
+    outlen: var int,
+): MultiBaseStatus =
   ## Encode array ``inbytes`` using MultiBase encoding scheme ``encoding`` and
   ## store encoded value to ``outbytes``.
   ##
@@ -395,8 +441,7 @@ proc encode*(mbtype: typedesc[MultiBase], encoding: string,
   if isNil(mb.encr) or isNil(mb.encl):
     return MultiBaseStatus.NotSupported
   if len(outbytes) > 1:
-    result = mb.encr(inbytes, outbytes.toOpenArray(1, outbytes.high),
-                     outlen)
+    result = mb.encr(inbytes, outbytes.toOpenArray(1, outbytes.high), outlen)
     if result == MultiBaseStatus.Overrun:
       outlen += 1
     elif result == MultiBaseStatus.Success:
@@ -411,8 +456,12 @@ proc encode*(mbtype: typedesc[MultiBase], encoding: string,
       result = MultiBaseStatus.Overrun
       outlen = mb.encl(len(inbytes)) + 1
 
-proc decode*(mbtype: typedesc[MultiBase], inbytes: openArray[char],
-             outbytes: var openArray[byte], outlen: var int): MultiBaseStatus =
+proc decode*(
+    mbtype: typedesc[MultiBase],
+    inbytes: openArray[char],
+    outbytes: var openArray[byte],
+    outlen: var int,
+): MultiBaseStatus =
   ## Decode array ``inbytes`` using MultiBase encoding and store decoded value
   ## to ``outbytes``.
   ##
@@ -441,8 +490,9 @@ proc decode*(mbtype: typedesc[MultiBase], inbytes: openArray[char],
   else:
     result = mb.decr(inbytes.toOpenArray(1, length - 1), outbytes, outlen)
 
-proc encode*(mbtype: typedesc[MultiBase], encoding: string,
-             inbytes: openArray[byte]): Result[string, string] =
+proc encode*(
+    mbtype: typedesc[MultiBase], encoding: string, inbytes: openArray[byte]
+): Result[string, string] =
   ## Encode array ``inbytes`` using MultiBase encoding scheme ``encoding`` and
   ## return encoded string.
   let length = len(inbytes)
@@ -465,7 +515,9 @@ proc encode*(mbtype: typedesc[MultiBase], encoding: string,
     buffer[0] = mb.code
   ok(buffer)
 
-proc decode*(mbtype: typedesc[MultiBase], inbytes: openArray[char]): Result[seq[byte], string] =
+proc decode*(
+    mbtype: typedesc[MultiBase], inbytes: openArray[char]
+): Result[seq[byte], string] =
   ## Decode MultiBase encoded array ``inbytes`` and return decoded sequence of
   ## bytes.
   let length = len(inbytes)
@@ -482,8 +534,7 @@ proc decode*(mbtype: typedesc[MultiBase], inbytes: openArray[char]): Result[seq[
   else:
     var buffer = newSeq[byte](mb.decl(length - 1))
     var outlen = 0
-    let res = mb.decr(inbytes.toOpenArray(1, length - 1),
-                      buffer, outlen)
+    let res = mb.decr(inbytes.toOpenArray(1, length - 1), buffer, outlen)
     if res != MultiBaseStatus.Success:
       err("multibase: Decoding error [" & $res & "]")
     else:

libp2p/multicodec.nim

@@ -9,18 +9,13 @@
 
 ## This module implements MultiCodec.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables, hashes
-import varint, vbuffer
+import vbuffer
 import stew/results
 export results
 
-{.deadCodeElim: on.}
-
 ## List of officially supported codecs can BE found here
 ## https://github.com/multiformats/multicodec/blob/master/table.csv
 const MultiCodecList = [
@@ -54,132 +49,325 @@ const MultiCodecList = [
   ("keccak-384", 0x1C),
   ("keccak-512", 0x1D),
   ("murmur3", 0x22),
-  ("blake2b-8", 0xB201), ("blake2b-16", 0xB202), ("blake2b-24", 0xB203),
-  ("blake2b-32", 0xB204), ("blake2b-40", 0xB205), ("blake2b-48", 0xB206),
-  ("blake2b-56", 0xB207), ("blake2b-64", 0xB208), ("blake2b-72", 0xB209),
-  ("blake2b-80", 0xB20A), ("blake2b-88", 0xB20B), ("blake2b-96", 0xB20C),
-  ("blake2b-104", 0xB20D), ("blake2b-112", 0xB20E), ("blake2b-120", 0xB20F),
-  ("blake2b-128", 0xB210), ("blake2b-136", 0xB211), ("blake2b-144", 0xB212),
-  ("blake2b-152", 0xB213), ("blake2b-160", 0xB214), ("blake2b-168", 0xB215),
-  ("blake2b-176", 0xB216), ("blake2b-184", 0xB217), ("blake2b-192", 0xB218),
-  ("blake2b-200", 0xB219), ("blake2b-208", 0xB21A), ("blake2b-216", 0xB21B),
-  ("blake2b-224", 0xB21C), ("blake2b-232", 0xB21D), ("blake2b-240", 0xB21E),
-  ("blake2b-248", 0xB21F), ("blake2b-256", 0xB220), ("blake2b-264", 0xB221),
-  ("blake2b-272", 0xB222), ("blake2b-280", 0xB223), ("blake2b-288", 0xB224),
-  ("blake2b-296", 0xB225), ("blake2b-304", 0xB226), ("blake2b-312", 0xB227),
-  ("blake2b-320", 0xB228), ("blake2b-328", 0xB229), ("blake2b-336", 0xB22A),
-  ("blake2b-344", 0xB22B), ("blake2b-352", 0xB22C), ("blake2b-360", 0xB22D),
-  ("blake2b-368", 0xB22E), ("blake2b-376", 0xB22F), ("blake2b-384", 0xB230),
-  ("blake2b-392", 0xB231), ("blake2b-400", 0xB232), ("blake2b-408", 0xB233),
-  ("blake2b-416", 0xB234), ("blake2b-424", 0xB235), ("blake2b-432", 0xB236),
-  ("blake2b-440", 0xB237), ("blake2b-448", 0xB238), ("blake2b-456", 0xB239),
-  ("blake2b-464", 0xB23A), ("blake2b-472", 0xB23B), ("blake2b-480", 0xB23C),
-  ("blake2b-488", 0xB23D), ("blake2b-496", 0xB23E), ("blake2b-504", 0xB23F),
-  ("blake2b-512", 0xB240), ("blake2s-8", 0xB241), ("blake2s-16", 0xB242),
-  ("blake2s-24", 0xB243), ("blake2s-32", 0xB244), ("blake2s-40", 0xB245),
-  ("blake2s-48", 0xB246), ("blake2s-56", 0xB247), ("blake2s-64", 0xB248),
-  ("blake2s-72", 0xB249), ("blake2s-80", 0xB24A), ("blake2s-88", 0xB24B),
-  ("blake2s-96", 0xB24C), ("blake2s-104", 0xB24D), ("blake2s-112", 0xB24E),
-  ("blake2s-120", 0xB24F), ("blake2s-128", 0xB250), ("blake2s-136", 0xB251),
-  ("blake2s-144", 0xB252), ("blake2s-152", 0xB253), ("blake2s-160", 0xB254),
-  ("blake2s-168", 0xB255), ("blake2s-176", 0xB256), ("blake2s-184", 0xB257),
-  ("blake2s-192", 0xB258), ("blake2s-200", 0xB259), ("blake2s-208", 0xB25A),
-  ("blake2s-216", 0xB25B), ("blake2s-224", 0xB25C), ("blake2s-232", 0xB25D),
-  ("blake2s-240", 0xB25E), ("blake2s-248", 0xB25F), ("blake2s-256", 0xB260),
-  ("skein256-8", 0xB301), ("skein256-16", 0xB302), ("skein256-24", 0xB303),
-  ("skein256-32", 0xB304), ("skein256-40", 0xB305), ("skein256-48", 0xB306),
-  ("skein256-56", 0xB307), ("skein256-64", 0xB308), ("skein256-72", 0xB309),
-  ("skein256-80", 0xB30A), ("skein256-88", 0xB30B), ("skein256-96", 0xB30C),
-  ("skein256-104", 0xB30D), ("skein256-112", 0xB30E), ("skein256-120", 0xB30F),
-  ("skein256-128", 0xB310), ("skein256-136", 0xB311), ("skein256-144", 0xB312),
-  ("skein256-152", 0xB313), ("skein256-160", 0xB314), ("skein256-168", 0xB315),
-  ("skein256-176", 0xB316), ("skein256-184", 0xB317), ("skein256-192", 0xB318),
-  ("skein256-200", 0xB319), ("skein256-208", 0xB31A), ("skein256-216", 0xB31B),
-  ("skein256-224", 0xB31C), ("skein256-232", 0xB31D), ("skein256-240", 0xB31E),
-  ("skein256-248", 0xB31F), ("skein256-256", 0xB320),
-  ("skein512-8", 0xB321), ("skein512-16", 0xB322), ("skein512-24", 0xB323),
-  ("skein512-32", 0xB324), ("skein512-40", 0xB325), ("skein512-48", 0xB326),
-  ("skein512-56", 0xB327), ("skein512-64", 0xB328), ("skein512-72", 0xB329),
-  ("skein512-80", 0xB32A), ("skein512-88", 0xB32B), ("skein512-96", 0xB32C),
-  ("skein512-104", 0xB32D), ("skein512-112", 0xB32E), ("skein512-120", 0xB32F),
-  ("skein512-128", 0xB330), ("skein512-136", 0xB331), ("skein512-144", 0xB332),
-  ("skein512-152", 0xB333), ("skein512-160", 0xB334), ("skein512-168", 0xB335),
-  ("skein512-176", 0xB336), ("skein512-184", 0xB337), ("skein512-192", 0xB338),
-  ("skein512-200", 0xB339), ("skein512-208", 0xB33A), ("skein512-216", 0xB33B),
-  ("skein512-224", 0xB33C), ("skein512-232", 0xB33D), ("skein512-240", 0xB33E),
-  ("skein512-248", 0xB33F), ("skein512-256", 0xB340), ("skein512-264", 0xB341),
-  ("skein512-272", 0xB342), ("skein512-280", 0xB343), ("skein512-288", 0xB344),
-  ("skein512-296", 0xB345), ("skein512-304", 0xB346), ("skein512-312", 0xB347),
-  ("skein512-320", 0xB348), ("skein512-328", 0xB349), ("skein512-336", 0xB34A),
-  ("skein512-344", 0xB34B), ("skein512-352", 0xB34C), ("skein512-360", 0xB34D),
-  ("skein512-368", 0xB34E), ("skein512-376", 0xB34F), ("skein512-384", 0xB350),
-  ("skein512-392", 0xB351), ("skein512-400", 0xB352), ("skein512-408", 0xB353),
-  ("skein512-416", 0xB354), ("skein512-424", 0xB355), ("skein512-432", 0xB356),
-  ("skein512-440", 0xB357), ("skein512-448", 0xB358), ("skein512-456", 0xB359),
-  ("skein512-464", 0xB35A), ("skein512-472", 0xB35B), ("skein512-480", 0xB35C),
-  ("skein512-488", 0xB35D), ("skein512-496", 0xB35E), ("skein512-504", 0xB35F),
-  ("skein512-512", 0xB360), ("skein1024-8", 0xB361), ("skein1024-16", 0xB362),
-  ("skein1024-24", 0xB363), ("skein1024-32", 0xB364), ("skein1024-40", 0xB365),
-  ("skein1024-48", 0xB366), ("skein1024-56", 0xB367), ("skein1024-64", 0xB368),
-  ("skein1024-72", 0xB369), ("skein1024-80", 0xB36A), ("skein1024-88", 0xB36B),
-  ("skein1024-96", 0xB36C), ("skein1024-104", 0xB36D),
-  ("skein1024-112", 0xB36E), ("skein1024-120", 0xB36F),
-  ("skein1024-128", 0xB370), ("skein1024-136", 0xB371),
-  ("skein1024-144", 0xB372), ("skein1024-152", 0xB373),
-  ("skein1024-160", 0xB374), ("skein1024-168", 0xB375),
-  ("skein1024-176", 0xB376), ("skein1024-184", 0xB377),
-  ("skein1024-192", 0xB378), ("skein1024-200", 0xB379),
-  ("skein1024-208", 0xB37A), ("skein1024-216", 0xB37B),
-  ("skein1024-224", 0xB37C), ("skein1024-232", 0xB37D),
-  ("skein1024-240", 0xB37E), ("skein1024-248", 0xB37F),
-  ("skein1024-256", 0xB380), ("skein1024-264", 0xB381),
-  ("skein1024-272", 0xB382), ("skein1024-280", 0xB383),
-  ("skein1024-288", 0xB384), ("skein1024-296", 0xB385),
-  ("skein1024-304", 0xB386), ("skein1024-312", 0xB387),
-  ("skein1024-320", 0xB388), ("skein1024-328", 0xB389),
-  ("skein1024-336", 0xB38A), ("skein1024-344", 0xB38B),
-  ("skein1024-352", 0xB38C), ("skein1024-360", 0xB38D),
-  ("skein1024-368", 0xB38E), ("skein1024-376", 0xB38F),
-  ("skein1024-384", 0xB390), ("skein1024-392", 0xB391),
-  ("skein1024-400", 0xB392), ("skein1024-408", 0xB393),
-  ("skein1024-416", 0xB394), ("skein1024-424", 0xB395),
-  ("skein1024-432", 0xB396), ("skein1024-440", 0xB397),
-  ("skein1024-448", 0xB398), ("skein1024-456", 0xB399),
-  ("skein1024-464", 0xB39A), ("skein1024-472", 0xB39B),
-  ("skein1024-480", 0xB39C), ("skein1024-488", 0xB39D),
-  ("skein1024-496", 0xB39E), ("skein1024-504", 0xB39F),
-  ("skein1024-512", 0xB3A0), ("skein1024-520", 0xB3A1),
-  ("skein1024-528", 0xB3A2), ("skein1024-536", 0xB3A3),
-  ("skein1024-544", 0xB3A4), ("skein1024-552", 0xB3A5),
-  ("skein1024-560", 0xB3A6), ("skein1024-568", 0xB3A7),
-  ("skein1024-576", 0xB3A8), ("skein1024-584", 0xB3A9),
-  ("skein1024-592", 0xB3AA), ("skein1024-600", 0xB3AB),
-  ("skein1024-608", 0xB3AC), ("skein1024-616", 0xB3AD),
-  ("skein1024-624", 0xB3AE), ("skein1024-632", 0xB3AF),
-  ("skein1024-640", 0xB3B0), ("skein1024-648", 0xB3B1),
-  ("skein1024-656", 0xB3B2), ("skein1024-664", 0xB3B3),
-  ("skein1024-672", 0xB3B4), ("skein1024-680", 0xB3B5),
-  ("skein1024-688", 0xB3B6), ("skein1024-696", 0xB3B7),
-  ("skein1024-704", 0xB3B8), ("skein1024-712", 0xB3B9),
-  ("skein1024-720", 0xB3BA), ("skein1024-728", 0xB3BB),
-  ("skein1024-736", 0xB3BC), ("skein1024-744", 0xB3BD),
-  ("skein1024-752", 0xB3BE), ("skein1024-760", 0xB3BF),
-  ("skein1024-768", 0xB3C0), ("skein1024-776", 0xB3C1),
-  ("skein1024-784", 0xB3C2), ("skein1024-792", 0xB3C3),
-  ("skein1024-800", 0xB3C4), ("skein1024-808", 0xB3C5),
-  ("skein1024-816", 0xB3C6), ("skein1024-824", 0xB3C7),
-  ("skein1024-832", 0xB3C8), ("skein1024-840", 0xB3C9),
-  ("skein1024-848", 0xB3CA), ("skein1024-856", 0xB3CB),
-  ("skein1024-864", 0xB3CC), ("skein1024-872", 0xB3CD),
-  ("skein1024-880", 0xB3CE), ("skein1024-888", 0xB3CF),
-  ("skein1024-896", 0xB3D0), ("skein1024-904", 0xB3D1),
-  ("skein1024-912", 0xB3D2), ("skein1024-920", 0xB3D3),
-  ("skein1024-928", 0xB3D4), ("skein1024-936", 0xB3D5),
-  ("skein1024-944", 0xB3D6), ("skein1024-952", 0xB3D7),
-  ("skein1024-960", 0xB3D8), ("skein1024-968", 0xB3D9),
-  ("skein1024-976", 0xB3DA), ("skein1024-984", 0xB3DB),
-  ("skein1024-992", 0xB3DC), ("skein1024-1000", 0xB3DD),
-  ("skein1024-1008", 0xB3DE), ("skein1024-1016", 0xB3DF),
+  ("blake2b-8", 0xB201),
+  ("blake2b-16", 0xB202),
+  ("blake2b-24", 0xB203),
+  ("blake2b-32", 0xB204),
+  ("blake2b-40", 0xB205),
+  ("blake2b-48", 0xB206),
+  ("blake2b-56", 0xB207),
+  ("blake2b-64", 0xB208),
+  ("blake2b-72", 0xB209),
+  ("blake2b-80", 0xB20A),
+  ("blake2b-88", 0xB20B),
+  ("blake2b-96", 0xB20C),
+  ("blake2b-104", 0xB20D),
+  ("blake2b-112", 0xB20E),
+  ("blake2b-120", 0xB20F),
+  ("blake2b-128", 0xB210),
+  ("blake2b-136", 0xB211),
+  ("blake2b-144", 0xB212),
+  ("blake2b-152", 0xB213),
+  ("blake2b-160", 0xB214),
+  ("blake2b-168", 0xB215),
+  ("blake2b-176", 0xB216),
+  ("blake2b-184", 0xB217),
+  ("blake2b-192", 0xB218),
+  ("blake2b-200", 0xB219),
+  ("blake2b-208", 0xB21A),
+  ("blake2b-216", 0xB21B),
+  ("blake2b-224", 0xB21C),
+  ("blake2b-232", 0xB21D),
+  ("blake2b-240", 0xB21E),
+  ("blake2b-248", 0xB21F),
+  ("blake2b-256", 0xB220),
+  ("blake2b-264", 0xB221),
+  ("blake2b-272", 0xB222),
+  ("blake2b-280", 0xB223),
+  ("blake2b-288", 0xB224),
+  ("blake2b-296", 0xB225),
+  ("blake2b-304", 0xB226),
+  ("blake2b-312", 0xB227),
+  ("blake2b-320", 0xB228),
+  ("blake2b-328", 0xB229),
+  ("blake2b-336", 0xB22A),
+  ("blake2b-344", 0xB22B),
+  ("blake2b-352", 0xB22C),
+  ("blake2b-360", 0xB22D),
+  ("blake2b-368", 0xB22E),
+  ("blake2b-376", 0xB22F),
+  ("blake2b-384", 0xB230),
+  ("blake2b-392", 0xB231),
+  ("blake2b-400", 0xB232),
+  ("blake2b-408", 0xB233),
+  ("blake2b-416", 0xB234),
+  ("blake2b-424", 0xB235),
+  ("blake2b-432", 0xB236),
+  ("blake2b-440", 0xB237),
+  ("blake2b-448", 0xB238),
+  ("blake2b-456", 0xB239),
+  ("blake2b-464", 0xB23A),
+  ("blake2b-472", 0xB23B),
+  ("blake2b-480", 0xB23C),
+  ("blake2b-488", 0xB23D),
+  ("blake2b-496", 0xB23E),
+  ("blake2b-504", 0xB23F),
+  ("blake2b-512", 0xB240),
+  ("blake2s-8", 0xB241),
+  ("blake2s-16", 0xB242),
+  ("blake2s-24", 0xB243),
+  ("blake2s-32", 0xB244),
+  ("blake2s-40", 0xB245),
+  ("blake2s-48", 0xB246),
+  ("blake2s-56", 0xB247),
+  ("blake2s-64", 0xB248),
+  ("blake2s-72", 0xB249),
+  ("blake2s-80", 0xB24A),
+  ("blake2s-88", 0xB24B),
+  ("blake2s-96", 0xB24C),
+  ("blake2s-104", 0xB24D),
+  ("blake2s-112", 0xB24E),
+  ("blake2s-120", 0xB24F),
+  ("blake2s-128", 0xB250),
+  ("blake2s-136", 0xB251),
+  ("blake2s-144", 0xB252),
+  ("blake2s-152", 0xB253),
+  ("blake2s-160", 0xB254),
+  ("blake2s-168", 0xB255),
+  ("blake2s-176", 0xB256),
+  ("blake2s-184", 0xB257),
+  ("blake2s-192", 0xB258),
+  ("blake2s-200", 0xB259),
+  ("blake2s-208", 0xB25A),
+  ("blake2s-216", 0xB25B),
+  ("blake2s-224", 0xB25C),
+  ("blake2s-232", 0xB25D),
+  ("blake2s-240", 0xB25E),
+  ("blake2s-248", 0xB25F),
+  ("blake2s-256", 0xB260),
+  ("skein256-8", 0xB301),
+  ("skein256-16", 0xB302),
+  ("skein256-24", 0xB303),
+  ("skein256-32", 0xB304),
+  ("skein256-40", 0xB305),
+  ("skein256-48", 0xB306),
+  ("skein256-56", 0xB307),
+  ("skein256-64", 0xB308),
+  ("skein256-72", 0xB309),
+  ("skein256-80", 0xB30A),
+  ("skein256-88", 0xB30B),
+  ("skein256-96", 0xB30C),
+  ("skein256-104", 0xB30D),
+  ("skein256-112", 0xB30E),
+  ("skein256-120", 0xB30F),
+  ("skein256-128", 0xB310),
+  ("skein256-136", 0xB311),
+  ("skein256-144", 0xB312),
+  ("skein256-152", 0xB313),
+  ("skein256-160", 0xB314),
+  ("skein256-168", 0xB315),
+  ("skein256-176", 0xB316),
+  ("skein256-184", 0xB317),
+  ("skein256-192", 0xB318),
+  ("skein256-200", 0xB319),
+  ("skein256-208", 0xB31A),
+  ("skein256-216", 0xB31B),
+  ("skein256-224", 0xB31C),
+  ("skein256-232", 0xB31D),
+  ("skein256-240", 0xB31E),
+  ("skein256-248", 0xB31F),
+  ("skein256-256", 0xB320),
+  ("skein512-8", 0xB321),
+  ("skein512-16", 0xB322),
+  ("skein512-24", 0xB323),
+  ("skein512-32", 0xB324),
+  ("skein512-40", 0xB325),
+  ("skein512-48", 0xB326),
+  ("skein512-56", 0xB327),
+  ("skein512-64", 0xB328),
+  ("skein512-72", 0xB329),
+  ("skein512-80", 0xB32A),
+  ("skein512-88", 0xB32B),
+  ("skein512-96", 0xB32C),
+  ("skein512-104", 0xB32D),
+  ("skein512-112", 0xB32E),
+  ("skein512-120", 0xB32F),
+  ("skein512-128", 0xB330),
+  ("skein512-136", 0xB331),
+  ("skein512-144", 0xB332),
+  ("skein512-152", 0xB333),
+  ("skein512-160", 0xB334),
+  ("skein512-168", 0xB335),
+  ("skein512-176", 0xB336),
+  ("skein512-184", 0xB337),
+  ("skein512-192", 0xB338),
+  ("skein512-200", 0xB339),
+  ("skein512-208", 0xB33A),
+  ("skein512-216", 0xB33B),
+  ("skein512-224", 0xB33C),
+  ("skein512-232", 0xB33D),
+  ("skein512-240", 0xB33E),
+  ("skein512-248", 0xB33F),
+  ("skein512-256", 0xB340),
+  ("skein512-264", 0xB341),
+  ("skein512-272", 0xB342),
+  ("skein512-280", 0xB343),
+  ("skein512-288", 0xB344),
+  ("skein512-296", 0xB345),
+  ("skein512-304", 0xB346),
+  ("skein512-312", 0xB347),
+  ("skein512-320", 0xB348),
+  ("skein512-328", 0xB349),
+  ("skein512-336", 0xB34A),
+  ("skein512-344", 0xB34B),
+  ("skein512-352", 0xB34C),
+  ("skein512-360", 0xB34D),
+  ("skein512-368", 0xB34E),
+  ("skein512-376", 0xB34F),
+  ("skein512-384", 0xB350),
+  ("skein512-392", 0xB351),
+  ("skein512-400", 0xB352),
+  ("skein512-408", 0xB353),
+  ("skein512-416", 0xB354),
+  ("skein512-424", 0xB355),
+  ("skein512-432", 0xB356),
+  ("skein512-440", 0xB357),
+  ("skein512-448", 0xB358),
+  ("skein512-456", 0xB359),
+  ("skein512-464", 0xB35A),
+  ("skein512-472", 0xB35B),
+  ("skein512-480", 0xB35C),
+  ("skein512-488", 0xB35D),
+  ("skein512-496", 0xB35E),
+  ("skein512-504", 0xB35F),
+  ("skein512-512", 0xB360),
+  ("skein1024-8", 0xB361),
+  ("skein1024-16", 0xB362),
+  ("skein1024-24", 0xB363),
+  ("skein1024-32", 0xB364),
+  ("skein1024-40", 0xB365),
+  ("skein1024-48", 0xB366),
+  ("skein1024-56", 0xB367),
+  ("skein1024-64", 0xB368),
+  ("skein1024-72", 0xB369),
+  ("skein1024-80", 0xB36A),
+  ("skein1024-88", 0xB36B),
+  ("skein1024-96", 0xB36C),
+  ("skein1024-104", 0xB36D),
+  ("skein1024-112", 0xB36E),
+  ("skein1024-120", 0xB36F),
+  ("skein1024-128", 0xB370),
+  ("skein1024-136", 0xB371),
+  ("skein1024-144", 0xB372),
+  ("skein1024-152", 0xB373),
+  ("skein1024-160", 0xB374),
+  ("skein1024-168", 0xB375),
+  ("skein1024-176", 0xB376),
+  ("skein1024-184", 0xB377),
+  ("skein1024-192", 0xB378),
+  ("skein1024-200", 0xB379),
+  ("skein1024-208", 0xB37A),
+  ("skein1024-216", 0xB37B),
+  ("skein1024-224", 0xB37C),
+  ("skein1024-232", 0xB37D),
+  ("skein1024-240", 0xB37E),
+  ("skein1024-248", 0xB37F),
+  ("skein1024-256", 0xB380),
+  ("skein1024-264", 0xB381),
+  ("skein1024-272", 0xB382),
+  ("skein1024-280", 0xB383),
+  ("skein1024-288", 0xB384),
+  ("skein1024-296", 0xB385),
+  ("skein1024-304", 0xB386),
+  ("skein1024-312", 0xB387),
+  ("skein1024-320", 0xB388),
+  ("skein1024-328", 0xB389),
+  ("skein1024-336", 0xB38A),
+  ("skein1024-344", 0xB38B),
+  ("skein1024-352", 0xB38C),
+  ("skein1024-360", 0xB38D),
+  ("skein1024-368", 0xB38E),
+  ("skein1024-376", 0xB38F),
+  ("skein1024-384", 0xB390),
+  ("skein1024-392", 0xB391),
+  ("skein1024-400", 0xB392),
+  ("skein1024-408", 0xB393),
+  ("skein1024-416", 0xB394),
+  ("skein1024-424", 0xB395),
+  ("skein1024-432", 0xB396),
+  ("skein1024-440", 0xB397),
+  ("skein1024-448", 0xB398),
+  ("skein1024-456", 0xB399),
+  ("skein1024-464", 0xB39A),
+  ("skein1024-472", 0xB39B),
+  ("skein1024-480", 0xB39C),
+  ("skein1024-488", 0xB39D),
+  ("skein1024-496", 0xB39E),
+  ("skein1024-504", 0xB39F),
+  ("skein1024-512", 0xB3A0),
+  ("skein1024-520", 0xB3A1),
+  ("skein1024-528", 0xB3A2),
+  ("skein1024-536", 0xB3A3),
+  ("skein1024-544", 0xB3A4),
+  ("skein1024-552", 0xB3A5),
+  ("skein1024-560", 0xB3A6),
+  ("skein1024-568", 0xB3A7),
+  ("skein1024-576", 0xB3A8),
+  ("skein1024-584", 0xB3A9),
+  ("skein1024-592", 0xB3AA),
+  ("skein1024-600", 0xB3AB),
+  ("skein1024-608", 0xB3AC),
+  ("skein1024-616", 0xB3AD),
+  ("skein1024-624", 0xB3AE),
+  ("skein1024-632", 0xB3AF),
+  ("skein1024-640", 0xB3B0),
+  ("skein1024-648", 0xB3B1),
+  ("skein1024-656", 0xB3B2),
+  ("skein1024-664", 0xB3B3),
+  ("skein1024-672", 0xB3B4),
+  ("skein1024-680", 0xB3B5),
+  ("skein1024-688", 0xB3B6),
+  ("skein1024-696", 0xB3B7),
+  ("skein1024-704", 0xB3B8),
+  ("skein1024-712", 0xB3B9),
+  ("skein1024-720", 0xB3BA),
+  ("skein1024-728", 0xB3BB),
+  ("skein1024-736", 0xB3BC),
+  ("skein1024-744", 0xB3BD),
+  ("skein1024-752", 0xB3BE),
+  ("skein1024-760", 0xB3BF),
+  ("skein1024-768", 0xB3C0),
+  ("skein1024-776", 0xB3C1),
+  ("skein1024-784", 0xB3C2),
+  ("skein1024-792", 0xB3C3),
+  ("skein1024-800", 0xB3C4),
+  ("skein1024-808", 0xB3C5),
+  ("skein1024-816", 0xB3C6),
+  ("skein1024-824", 0xB3C7),
+  ("skein1024-832", 0xB3C8),
+  ("skein1024-840", 0xB3C9),
+  ("skein1024-848", 0xB3CA),
+  ("skein1024-856", 0xB3CB),
+  ("skein1024-864", 0xB3CC),
+  ("skein1024-872", 0xB3CD),
+  ("skein1024-880", 0xB3CE),
+  ("skein1024-888", 0xB3CF),
+  ("skein1024-896", 0xB3D0),
+  ("skein1024-904", 0xB3D1),
+  ("skein1024-912", 0xB3D2),
+  ("skein1024-920", 0xB3D3),
+  ("skein1024-928", 0xB3D4),
+  ("skein1024-936", 0xB3D5),
+  ("skein1024-944", 0xB3D6),
+  ("skein1024-952", 0xB3D7),
+  ("skein1024-960", 0xB3D8),
+  ("skein1024-968", 0xB3D9),
+  ("skein1024-976", 0xB3DA),
+  ("skein1024-984", 0xB3DB),
+  ("skein1024-992", 0xB3DC),
+  ("skein1024-1000", 0xB3DD),
+  ("skein1024-1008", 0xB3DE),
+  ("skein1024-1016", 0xB3DF),
   ("skein1024-1024", 0xB3E0),
   # multiaddrs
   ("ip4", 0x04),
@@ -196,9 +384,11 @@ const MultiCodecList = [
   ("p2p", 0x01A5),
   ("http", 0x01E0),
   ("https", 0x01BB),
+  ("tls", 0x01C0),
   ("quic", 0x01CC),
+  ("quic-v1", 0x01CD),
   ("ws", 0x01DD),
-  ("wss", 0x01DE), # not in multicodec list
+  ("wss", 0x01DE),
   ("p2p-websocket-star", 0x01DF), # not in multicodec list
   ("p2p-webrtc-star", 0x0113), # not in multicodec list
   ("p2p-webrtc-direct", 0x0114), # not in multicodec list
@@ -236,7 +426,7 @@ const MultiCodecList = [
   ("dash-tx", 0xF1),
   ("torrent-info", 0x7B),
   ("torrent-file", 0x7C),
-  ("ed25519-pub", 0xED)
+  ("ed25519-pub", 0xED),
 ]
 
 type
@@ -244,8 +434,7 @@ type
   MultiCodecError* = enum
     MultiCodecNotSupported
 
-const
-  InvalidMultiCodec* = MultiCodec(-1)
+const InvalidMultiCodec* = MultiCodec(-1)
 
 proc initMultiCodecNameTable(): Table[string, int] {.compileTime.} =
   for item in MultiCodecList:
@@ -292,10 +481,6 @@ proc `==`*(a, b: MultiCodec): bool =
   ## Returns ``true`` if MultiCodecs ``a`` and ``b`` are equal.
   int(a) == int(b)
 
-proc `!=`*(a, b: MultiCodec): bool =
-  ## Returns ``true`` if MultiCodecs ``a`` and ``b`` are not equal.
-  int(a) != int(b)
-
 proc hash*(m: MultiCodec): Hash {.inline.} =
   ## Hash procedure for tables.
   hash(int(m))

libp2p/multihash.nim

@@ -21,10 +21,7 @@
 ## 1. SKEIN
 ## 2. MURMUR
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables
 import nimcrypto/[sha, sha2, keccak, blake2, hash, utils]
@@ -44,8 +41,9 @@ const
   ErrParseError = "Parse error fromHex"
 
 type
-  MHashCoderProc* = proc(data: openArray[byte],
-                         output: var openArray[byte]) {.nimcall, gcsafe, noSideEffect, raises: [Defect].}
+  MHashCoderProc* = proc(data: openArray[byte], output: var openArray[byte]) {.
+    nimcall, gcsafe, noSideEffect, raises: []
+  .}
   MHash* = object
     mcodec*: MultiCodec
     size*: int
@@ -61,107 +59,152 @@ type
 
 proc identhash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
-    var length = if len(data) > len(output): len(output)
-                 else: len(data)
+    var length =
+      if len(data) > len(output):
+        len(output)
+      else:
+        len(data)
     copyMem(addr output[0], unsafeAddr data[0], length)
 
 proc sha1hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha1.digest(data)
-    var length = if sha1.sizeDigest > len(output): len(output)
-                 else: sha1.sizeDigest
+    var length =
+      if sha1.sizeDigest > len(output):
+        len(output)
+      else:
+        sha1.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc dblsha2_256hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest1 = sha256.digest(data)
     var digest2 = sha256.digest(digest1.data)
-    var length = if sha256.sizeDigest > len(output): len(output)
-                 else: sha256.sizeDigest
+    var length =
+      if sha256.sizeDigest > len(output):
+        len(output)
+      else:
+        sha256.sizeDigest
     copyMem(addr output[0], addr digest2.data[0], length)
 
 proc blake2Bhash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = blake2_512.digest(data)
-    var length = if blake2_512.sizeDigest > len(output): len(output)
-                 else: blake2_512.sizeDigest
+    var length =
+      if blake2_512.sizeDigest > len(output):
+        len(output)
+      else:
+        blake2_512.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc blake2Shash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = blake2_256.digest(data)
-    var length = if blake2_256.sizeDigest > len(output): len(output)
-                 else: blake2_256.sizeDigest
+    var length =
+      if blake2_256.sizeDigest > len(output):
+        len(output)
+      else:
+        blake2_256.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc sha2_256hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha256.digest(data)
-    var length = if sha256.sizeDigest > len(output): len(output)
-                 else: sha256.sizeDigest
+    var length =
+      if sha256.sizeDigest > len(output):
+        len(output)
+      else:
+        sha256.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc sha2_512hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha512.digest(data)
-    var length = if sha512.sizeDigest > len(output): len(output)
-                 else: sha512.sizeDigest
+    var length =
+      if sha512.sizeDigest > len(output):
+        len(output)
+      else:
+        sha512.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc sha3_224hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha3_224.digest(data)
-    var length = if sha3_224.sizeDigest > len(output): len(output)
-                 else: sha3_224.sizeDigest
+    var length =
+      if sha3_224.sizeDigest > len(output):
+        len(output)
+      else:
+        sha3_224.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc sha3_256hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha3_256.digest(data)
-    var length = if sha3_256.sizeDigest > len(output): len(output)
-                 else: sha3_256.sizeDigest
+    var length =
+      if sha3_256.sizeDigest > len(output):
+        len(output)
+      else:
+        sha3_256.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc sha3_384hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha3_384.digest(data)
-    var length = if sha3_384.sizeDigest > len(output): len(output)
-                 else: sha3_384.sizeDigest
+    var length =
+      if sha3_384.sizeDigest > len(output):
+        len(output)
+      else:
+        sha3_384.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc sha3_512hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = sha3_512.digest(data)
-    var length = if sha3_512.sizeDigest > len(output): len(output)
-                 else: sha3_512.sizeDigest
+    var length =
+      if sha3_512.sizeDigest > len(output):
+        len(output)
+      else:
+        sha3_512.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc keccak_224hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = keccak224.digest(data)
-    var length = if keccak224.sizeDigest > len(output): len(output)
-                 else: keccak224.sizeDigest
+    var length =
+      if keccak224.sizeDigest > len(output):
+        len(output)
+      else:
+        keccak224.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc keccak_256hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = keccak256.digest(data)
-    var length = if keccak256.sizeDigest > len(output): len(output)
-                 else: keccak256.sizeDigest
+    var length =
+      if keccak256.sizeDigest > len(output):
+        len(output)
+      else:
+        keccak256.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc keccak_384hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = keccak384.digest(data)
-    var length = if keccak384.sizeDigest > len(output): len(output)
-                 else: keccak384.sizeDigest
+    var length =
+      if keccak384.sizeDigest > len(output):
+        len(output)
+      else:
+        keccak384.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc keccak_512hash(data: openArray[byte], output: var openArray[byte]) =
   if len(output) > 0:
     var digest = keccak512.digest(data)
-    var length = if keccak512.sizeDigest > len(output): len(output)
-                 else: keccak512.sizeDigest
+    var length =
+      if keccak512.sizeDigest > len(output):
+        len(output)
+      else:
+        keccak512.sizeDigest
     copyMem(addr output[0], addr digest.data[0], length)
 
 proc shake_128hash(data: openArray[byte], output: var openArray[byte]) =
@@ -182,151 +225,135 @@ proc shake_256hash(data: openArray[byte], output: var openArray[byte]) =
     discard sctx.output(addr output[0], uint(len(output)))
     sctx.clear()
 
-const
-  HashesList = [
-    MHash(mcodec: multiCodec("identity"), size: 0,
-          coder: identhash),
-    MHash(mcodec: multiCodec("sha1"), size: sha1.sizeDigest,
-          coder: sha1hash),
-    MHash(mcodec: multiCodec("dbl-sha2-256"), size: sha256.sizeDigest,
-          coder: dblsha2_256hash
-    ),
-    MHash(mcodec: multiCodec("sha2-256"), size: sha256.sizeDigest,
-          coder: sha2_256hash
-    ),
-    MHash(mcodec: multiCodec("sha2-512"), size: sha512.sizeDigest,
-          coder: sha2_512hash
-    ),
-    MHash(mcodec: multiCodec("sha3-224"), size: sha3_224.sizeDigest,
-          coder: sha3_224hash
-    ),
-    MHash(mcodec: multiCodec("sha3-256"), size: sha3_256.sizeDigest,
-          coder: sha3_256hash
-    ),
-    MHash(mcodec: multiCodec("sha3-384"), size: sha3_384.sizeDigest,
-          coder: sha3_384hash
-    ),
-    MHash(mcodec: multiCodec("sha3-512"), size: sha3_512.sizeDigest,
-          coder: sha3_512hash
-    ),
-    MHash(mcodec: multiCodec("shake-128"), size: 32, coder: shake_128hash),
-    MHash(mcodec: multiCodec("shake-256"), size: 64, coder: shake_256hash),
-    MHash(mcodec: multiCodec("keccak-224"), size: keccak224.sizeDigest,
-          coder: keccak_224hash
-    ),
-    MHash(mcodec: multiCodec("keccak-256"), size: keccak256.sizeDigest,
-          coder: keccak_256hash
-    ),
-    MHash(mcodec: multiCodec("keccak-384"), size: keccak384.sizeDigest,
-          coder: keccak_384hash
-    ),
-    MHash(mcodec: multiCodec("keccak-512"), size: keccak512.sizeDigest,
-          coder: keccak_512hash
-    ),
-    MHash(mcodec: multiCodec("blake2b-8"), size: 1, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-16"), size: 2, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-24"), size: 3, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-32"), size: 4, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-40"), size: 5, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-48"), size: 6, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-56"), size: 7, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-64"), size: 8, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-72"), size: 9, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-80"), size: 10, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-88"), size: 11, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-96"), size: 12, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-104"), size: 13, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-112"), size: 14, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-120"), size: 15, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-128"), size: 16, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-136"), size: 17, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-144"), size: 18, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-152"), size: 19, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-160"), size: 20, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-168"), size: 21, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-176"), size: 22, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-184"), size: 23, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-192"), size: 24, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-200"), size: 25, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-208"), size: 26, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-216"), size: 27, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-224"), size: 28, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-232"), size: 29, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-240"), size: 30, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-248"), size: 31, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-256"), size: 32, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-264"), size: 33, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-272"), size: 34, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-280"), size: 35, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-288"), size: 36, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-296"), size: 37, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-304"), size: 38, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-312"), size: 39, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-320"), size: 40, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-328"), size: 41, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-336"), size: 42, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-344"), size: 43, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-352"), size: 44, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-360"), size: 45, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-368"), size: 46, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-376"), size: 47, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-384"), size: 48, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-392"), size: 49, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-400"), size: 50, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-408"), size: 51, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-416"), size: 52, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-424"), size: 53, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-432"), size: 54, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-440"), size: 55, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-448"), size: 56, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-456"), size: 57, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-464"), size: 58, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-472"), size: 59, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-480"), size: 60, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-488"), size: 61, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-496"), size: 62, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-504"), size: 63, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2b-512"), size: 64, coder: blake2Bhash),
-    MHash(mcodec: multiCodec("blake2s-8"), size: 1, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-16"), size: 2, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-24"), size: 3, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-32"), size: 4, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-40"), size: 5, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-48"), size: 6, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-56"), size: 7, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-64"), size: 8, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-72"), size: 9, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-80"), size: 10, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-88"), size: 11, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-96"), size: 12, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-104"), size: 13, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-112"), size: 14, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-120"), size: 15, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-128"), size: 16, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-136"), size: 17, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-144"), size: 18, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-152"), size: 19, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-160"), size: 20, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-168"), size: 21, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-176"), size: 22, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-184"), size: 23, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-192"), size: 24, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-200"), size: 25, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-208"), size: 26, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-216"), size: 27, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-224"), size: 28, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-232"), size: 29, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-240"), size: 30, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-248"), size: 31, coder: blake2Shash),
-    MHash(mcodec: multiCodec("blake2s-256"), size: 32, coder: blake2Shash)
-  ]
+const HashesList = [
+  MHash(mcodec: multiCodec("identity"), size: 0, coder: identhash),
+  MHash(mcodec: multiCodec("sha1"), size: sha1.sizeDigest, coder: sha1hash),
+  MHash(
+    mcodec: multiCodec("dbl-sha2-256"), size: sha256.sizeDigest, coder: dblsha2_256hash
+  ),
+  MHash(mcodec: multiCodec("sha2-256"), size: sha256.sizeDigest, coder: sha2_256hash),
+  MHash(mcodec: multiCodec("sha2-512"), size: sha512.sizeDigest, coder: sha2_512hash),
+  MHash(mcodec: multiCodec("sha3-224"), size: sha3_224.sizeDigest, coder: sha3_224hash),
+  MHash(mcodec: multiCodec("sha3-256"), size: sha3_256.sizeDigest, coder: sha3_256hash),
+  MHash(mcodec: multiCodec("sha3-384"), size: sha3_384.sizeDigest, coder: sha3_384hash),
+  MHash(mcodec: multiCodec("sha3-512"), size: sha3_512.sizeDigest, coder: sha3_512hash),
+  MHash(mcodec: multiCodec("shake-128"), size: 32, coder: shake_128hash),
+  MHash(mcodec: multiCodec("shake-256"), size: 64, coder: shake_256hash),
+  MHash(
+    mcodec: multiCodec("keccak-224"), size: keccak224.sizeDigest, coder: keccak_224hash
+  ),
+  MHash(
+    mcodec: multiCodec("keccak-256"), size: keccak256.sizeDigest, coder: keccak_256hash
+  ),
+  MHash(
+    mcodec: multiCodec("keccak-384"), size: keccak384.sizeDigest, coder: keccak_384hash
+  ),
+  MHash(
+    mcodec: multiCodec("keccak-512"), size: keccak512.sizeDigest, coder: keccak_512hash
+  ),
+  MHash(mcodec: multiCodec("blake2b-8"), size: 1, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-16"), size: 2, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-24"), size: 3, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-32"), size: 4, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-40"), size: 5, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-48"), size: 6, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-56"), size: 7, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-64"), size: 8, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-72"), size: 9, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-80"), size: 10, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-88"), size: 11, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-96"), size: 12, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-104"), size: 13, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-112"), size: 14, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-120"), size: 15, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-128"), size: 16, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-136"), size: 17, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-144"), size: 18, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-152"), size: 19, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-160"), size: 20, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-168"), size: 21, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-176"), size: 22, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-184"), size: 23, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-192"), size: 24, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-200"), size: 25, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-208"), size: 26, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-216"), size: 27, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-224"), size: 28, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-232"), size: 29, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-240"), size: 30, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-248"), size: 31, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-256"), size: 32, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-264"), size: 33, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-272"), size: 34, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-280"), size: 35, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-288"), size: 36, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-296"), size: 37, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-304"), size: 38, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-312"), size: 39, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-320"), size: 40, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-328"), size: 41, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-336"), size: 42, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-344"), size: 43, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-352"), size: 44, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-360"), size: 45, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-368"), size: 46, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-376"), size: 47, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-384"), size: 48, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-392"), size: 49, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-400"), size: 50, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-408"), size: 51, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-416"), size: 52, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-424"), size: 53, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-432"), size: 54, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-440"), size: 55, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-448"), size: 56, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-456"), size: 57, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-464"), size: 58, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-472"), size: 59, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-480"), size: 60, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-488"), size: 61, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-496"), size: 62, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-504"), size: 63, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2b-512"), size: 64, coder: blake2Bhash),
+  MHash(mcodec: multiCodec("blake2s-8"), size: 1, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-16"), size: 2, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-24"), size: 3, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-32"), size: 4, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-40"), size: 5, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-48"), size: 6, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-56"), size: 7, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-64"), size: 8, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-72"), size: 9, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-80"), size: 10, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-88"), size: 11, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-96"), size: 12, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-104"), size: 13, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-112"), size: 14, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-120"), size: 15, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-128"), size: 16, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-136"), size: 17, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-144"), size: 18, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-152"), size: 19, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-160"), size: 20, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-168"), size: 21, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-176"), size: 22, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-184"), size: 23, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-192"), size: 24, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-200"), size: 25, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-208"), size: 26, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-216"), size: 27, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-224"), size: 28, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-232"), size: 29, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-240"), size: 30, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-248"), size: 31, coder: blake2Shash),
+  MHash(mcodec: multiCodec("blake2s-256"), size: 32, coder: blake2Shash),
+]
 
 proc initMultiHashCodeTable(): Table[MultiCodec, MHash] {.compileTime.} =
   for item in HashesList:
     result[item.mcodec] = item
 
-const
-  CodeHashes = initMultiHashCodeTable()
+const CodeHashes = initMultiHashCodeTable()
 
 proc digestImplWithHash(hash: MHash, data: openArray[byte]): MultiHash =
   var buffer: array[MaxHashSize, byte]
@@ -356,8 +383,9 @@ proc digestImplWithoutHash(hash: MHash, data: openArray[byte]): MultiHash =
   result.data.writeArray(data)
   result.data.finish()
 
-proc digest*(mhtype: typedesc[MultiHash], hashname: string,
-             data: openArray[byte]): MhResult[MultiHash] {.inline.} =
+proc digest*(
+    mhtype: typedesc[MultiHash], hashname: string, data: openArray[byte]
+): MhResult[MultiHash] {.inline.} =
   ## Perform digest calculation using hash algorithm with name ``hashname`` on
   ## data array ``data``.
   let mc = MultiCodec.codec(hashname)
@@ -370,8 +398,9 @@ proc digest*(mhtype: typedesc[MultiHash], hashname: string,
     else:
       ok(digestImplWithHash(hash, data))
 
-proc digest*(mhtype: typedesc[MultiHash], hashcode: int,
-             data: openArray[byte]): MhResult[MultiHash] {.inline.} =
+proc digest*(
+    mhtype: typedesc[MultiHash], hashcode: int, data: openArray[byte]
+): MhResult[MultiHash] {.inline.} =
   ## Perform digest calculation using hash algorithm with code ``hashcode`` on
   ## data array ``data``.
   let hash = CodeHashes.getOrDefault(hashcode)
@@ -380,8 +409,9 @@ proc digest*(mhtype: typedesc[MultiHash], hashcode: int,
   else:
     ok(digestImplWithHash(hash, data))
 
-proc init*[T](mhtype: typedesc[MultiHash], hashname: string,
-                mdigest: MDigest[T]): MhResult[MultiHash] {.inline.} =
+proc init*[T](
+    mhtype: typedesc[MultiHash], hashname: string, mdigest: MDigest[T]
+): MhResult[MultiHash] {.inline.} =
   ## Create MultiHash from nimcrypto's `MDigest` object and hash algorithm name
   ## ``hashname``.
   let mc = MultiCodec.codec(hashname)
@@ -396,8 +426,9 @@ proc init*[T](mhtype: typedesc[MultiHash], hashname: string,
     else:
       ok(digestImplWithoutHash(hash, mdigest.data))
 
-proc init*[T](mhtype: typedesc[MultiHash], hashcode: MultiCodec,
-              mdigest: MDigest[T]): MhResult[MultiHash] {.inline.} =
+proc init*[T](
+    mhtype: typedesc[MultiHash], hashcode: MultiCodec, mdigest: MDigest[T]
+): MhResult[MultiHash] {.inline.} =
   ## Create MultiHash from nimcrypto's `MDigest` and hash algorithm code
   ## ``hashcode``.
   let hash = CodeHashes.getOrDefault(hashcode)
@@ -408,8 +439,9 @@ proc init*[T](mhtype: typedesc[MultiHash], hashcode: MultiCodec,
   else:
     ok(digestImplWithoutHash(hash, mdigest.data))
 
-proc init*(mhtype: typedesc[MultiHash], hashname: string,
-           bdigest: openArray[byte]): MhResult[MultiHash] {.inline.} =
+proc init*(
+    mhtype: typedesc[MultiHash], hashname: string, bdigest: openArray[byte]
+): MhResult[MultiHash] {.inline.} =
   ## Create MultiHash from array of bytes ``bdigest`` and hash algorithm code
   ## ``hashcode``.
   let mc = MultiCodec.codec(hashname)
@@ -424,8 +456,9 @@ proc init*(mhtype: typedesc[MultiHash], hashname: string,
     else:
       ok(digestImplWithoutHash(hash, bdigest))
 
-proc init*(mhtype: typedesc[MultiHash], hashcode: MultiCodec,
-           bdigest: openArray[byte]): MhResult[MultiHash] {.inline.} =
+proc init*(
+    mhtype: typedesc[MultiHash], hashcode: MultiCodec, bdigest: openArray[byte]
+): MhResult[MultiHash] {.inline.} =
   ## Create MultiHash from array of bytes ``bdigest`` and hash algorithm code
   ## ``hashcode``.
   let hash = CodeHashes.getOrDefault(hashcode)
@@ -436,8 +469,9 @@ proc init*(mhtype: typedesc[MultiHash], hashcode: MultiCodec,
   else:
     ok(digestImplWithoutHash(hash, bdigest))
 
-proc decode*(mhtype: typedesc[MultiHash], data: openArray[byte],
-             mhash: var MultiHash): MhResult[int] =
+proc decode*(
+    mhtype: typedesc[MultiHash], data: openArray[byte], mhash: var MultiHash
+): MhResult[int] =
   ## Decode MultiHash value from array of bytes ``data``.
   ##
   ## On success decoded MultiHash will be stored into ``mhash`` and number of
@@ -476,9 +510,10 @@ proc decode*(mhtype: typedesc[MultiHash], data: openArray[byte],
   if not vb.isEnough(int(size)):
     return err(ErrDecodeError)
 
-  mhash = ? MultiHash.init(MultiCodec(code),
-                         vb.buffer.toOpenArray(vb.offset,
-                                               vb.offset + int(size) - 1))
+  mhash =
+    ?MultiHash.init(
+      MultiCodec(code), vb.buffer.toOpenArray(vb.offset, vb.offset + int(size) - 1)
+    )
   ok(vb.offset + int(size))
 
 proc validate*(mhtype: typedesc[MultiHash], data: openArray[byte]): bool =
@@ -511,24 +546,24 @@ proc validate*(mhtype: typedesc[MultiHash], data: openArray[byte]): bool =
     return false
   result = true
 
-proc init*(mhtype: typedesc[MultiHash],
-           data: openArray[byte]): MhResult[MultiHash] {.inline.} =
+proc init*(
+    mhtype: typedesc[MultiHash], data: openArray[byte]
+): MhResult[MultiHash] {.inline.} =
   ## Create MultiHash from bytes array ``data``.
   var hash: MultiHash
-  discard ? MultiHash.decode(data, hash)
+  discard ?MultiHash.decode(data, hash)
   ok(hash)
 
 proc init*(mhtype: typedesc[MultiHash], data: string): MhResult[MultiHash] {.inline.} =
   ## Create MultiHash from hexadecimal string representation ``data``.
   var hash: MultiHash
   try:
-    discard ? MultiHash.decode(fromHex(data), hash)
+    discard ?MultiHash.decode(fromHex(data), hash)
     ok(hash)
   except ValueError:
     err(ErrParseError)
 
-proc init58*(mhtype: typedesc[MultiHash],
-             data: string): MultiHash {.inline.} =
+proc init58*(mhtype: typedesc[MultiHash], data: string): MultiHash {.inline.} =
   ## Create MultiHash from BASE58 encoded string representation ``data``.
   if MultiHash.decode(Base58.decode(data), result) == -1:
     raise newException(MultihashError, "Incorrect MultiHash binary format")
@@ -541,7 +576,7 @@ proc cmp(a: openArray[byte], b: openArray[byte]): bool {.inline.} =
   while n > 0:
     dec(n)
     diff = int(a[n]) - int(b[n])
-    res = (res and -not(diff)) or diff
+    res = (res and - not (diff)) or diff
   result = (res == 0)
 
 proc `==`*[T](mh: MultiHash, mdigest: MDigest[T]): bool =
@@ -551,8 +586,10 @@ proc `==`*[T](mh: MultiHash, mdigest: MDigest[T]): bool =
     return false
   if len(mdigest.data) != mh.size:
     return false
-  result = cmp(mh.data.buffer.toOpenArray(mh.dpos, mh.dpos + mh.size - 1),
-               mdigest.data.toOpenArray(0, mdigest.data.high))
+  result = cmp(
+    mh.data.buffer.toOpenArray(mh.dpos, mh.dpos + mh.size - 1),
+    mdigest.data.toOpenArray(0, mdigest.data.high),
+  )
 
 proc `==`*[T](mdigest: MDigest[T], mh: MultiHash): bool {.inline.} =
   ## Compares MultiHash with nimcrypto's MDigest[T], returns ``true`` if
@@ -568,8 +605,10 @@ proc `==`*(a: MultiHash, b: MultiHash): bool =
     return false
   if a.size != b.size:
     return false
-  result = cmp(a.data.buffer.toOpenArray(a.dpos, a.dpos + a.size - 1),
-               b.data.buffer.toOpenArray(b.dpos, b.dpos + b.size - 1))
+  result = cmp(
+    a.data.buffer.toOpenArray(a.dpos, a.dpos + a.size - 1),
+    b.data.buffer.toOpenArray(b.dpos, b.dpos + b.size - 1),
+  )
 
 proc hex*(value: MultiHash): string =
   ## Return hexadecimal string representation of MultiHash ``value``.
@@ -581,16 +620,16 @@ proc base58*(value: MultiHash): string =
 
 proc `$`*(mh: MultiHash): string =
   ## Return string representation of MultiHash ``value``.
-  let digest = toHex(mh.data.buffer.toOpenArray(mh.dpos,
-                                                mh.dpos + mh.size - 1))
+  let digest = toHex(mh.data.buffer.toOpenArray(mh.dpos, mh.dpos + mh.size - 1))
   result = $(mh.mcodec) & "/" & digest
 
 proc write*(vb: var VBuffer, mh: MultiHash) {.inline.} =
   ## Write MultiHash value ``mh`` to buffer ``vb``.
   vb.writeArray(mh.data.buffer)
 
-proc encode*(mbtype: typedesc[MultiBase], encoding: string,
-             mh: MultiHash): string {.inline.} =
+proc encode*(
+    mbtype: typedesc[MultiBase], encoding: string, mh: MultiHash
+): string {.inline.} =
   ## Get MultiBase encoded representation of ``mh`` using encoding
   ## ``encoding``.
   result = MultiBase.encode(encoding, mh.data.buffer)

libp2p/multistream.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,29 +7,24 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[strutils, sequtils, tables]
 import chronos, chronicles, stew/byteutils
-import stream/connection,
-       protocols/protocol
+import stream/connection, protocols/protocol
 
 logScope:
   topics = "libp2p multistream"
 
 const
-  MsgSize* = 1024
-  Codec* = "/multistream/1.0.0"
+  MsgSize = 1024
+  Codec = "/multistream/1.0.0"
 
-  MSCodec* = "\x13" & Codec & "\n"
-  Na* = "\x03na\n"
-  Ls* = "\x03ls\n"
+  Na = "na\n"
+  Ls = "ls\n"
 
 type
-  Matcher* = proc (proto: string): bool {.gcsafe, raises: [Defect].}
+  Matcher* = proc(proto: string): bool {.gcsafe, raises: [].}
 
   MultiStreamError* = object of LPError
 
@@ -44,23 +39,20 @@ type
     codec*: string
 
 proc new*(T: typedesc[MultistreamSelect]): T =
-  T(
-    codec: MSCodec,
-  )
+  T(codec: Codec)
 
 template validateSuffix(str: string): untyped =
-    if str.endsWith("\n"):
-      str.removeSuffix("\n")
-    else:
-      raise newException(MultiStreamError, "MultistreamSelect failed, malformed message")
+  if str.endsWith("\n"):
+    str.removeSuffix("\n")
+  else:
+    raise (ref MultiStreamError)(msg: "MultistreamSelect failed, malformed message")
 
-proc select*(m: MultistreamSelect,
-             conn: Connection,
-             proto: seq[string]):
-             Future[string] {.async.} =
-  trace "initiating handshake", conn, codec = m.codec
+proc select*(
+    _: MultistreamSelect | type MultistreamSelect, conn: Connection, proto: seq[string]
+): Future[string] {.async: (raises: [CancelledError, LPStreamError, MultiStreamError]).} =
+  trace "initiating handshake", conn, codec = Codec
   ## select a remote protocol
-  await conn.write(m.codec) # write handshake
+  await conn.writeLp(Codec & "\n") # write handshake
   if proto.len() > 0:
     trace "selecting proto", conn, proto = proto[0]
     await conn.writeLp((proto[0] & "\n")) # select proto
@@ -70,7 +62,7 @@ proc select*(m: MultistreamSelect,
 
   if s != Codec:
     notice "handshake failed", conn, codec = s
-    raise newException(MultiStreamError, "MultistreamSelect handshake failed")
+    raise (ref MultiStreamError)(msg: "MultistreamSelect handshake failed")
   else:
     trace "multistream handshake success", conn
 
@@ -86,7 +78,7 @@ proc select*(m: MultistreamSelect,
       return proto[0]
     elif proto.len > 1:
       # Try to negotiate alternatives
-      let protos = proto[1..<proto.len()]
+      let protos = proto[1 ..< proto.len()]
       trace "selecting one of several protos", conn, protos = protos
       for p in protos:
         trace "selecting proto", conn, proto = p
@@ -102,24 +94,31 @@ proc select*(m: MultistreamSelect,
       # No alternatives, fail
       return ""
 
-proc select*(m: MultistreamSelect,
-             conn: Connection,
-             proto: string): Future[bool] {.async.} =
+proc select*(
+    _: MultistreamSelect | type MultistreamSelect, conn: Connection, proto: string
+): Future[bool] {.async: (raises: [CancelledError, LPStreamError, MultiStreamError]).} =
   if proto.len > 0:
-    return (await m.select(conn, @[proto])) == proto
+    (await MultistreamSelect.select(conn, @[proto])) == proto
   else:
-    return (await m.select(conn, @[])) == Codec
+    (await MultistreamSelect.select(conn, @[])) == Codec
 
-proc select*(m: MultistreamSelect, conn: Connection): Future[bool] =
+proc select*(
+    m: MultistreamSelect, conn: Connection
+): Future[bool] {.
+    async: (raises: [CancelledError, LPStreamError, MultiStreamError], raw: true)
+.} =
   m.select(conn, "")
 
-proc list*(m: MultistreamSelect,
-           conn: Connection): Future[seq[string]] {.async.} =
+proc list*(
+    m: MultistreamSelect, conn: Connection
+): Future[seq[string]] {.
+    async: (raises: [CancelledError, LPStreamError, MultiStreamError])
+.} =
   ## list remote protos requests on connection
   if not await m.select(conn):
     return
 
-  await conn.write(Ls) # send ls
+  await conn.writeLp(Ls) # send ls
 
   var list = newSeq[string]()
   let ms = string.fromBytes(await conn.readLp(MsgSize))
@@ -129,68 +128,87 @@ proc list*(m: MultistreamSelect,
 
   result = list
 
-proc handle*(m: MultistreamSelect, conn: Connection, active: bool = false) {.async, gcsafe.} =
-  trace "Starting multistream handler", conn, handshaked = active
+proc handle*(
+    _: type MultistreamSelect,
+    conn: Connection,
+    protos: seq[string],
+    matchers = newSeq[Matcher](),
+    active: bool = false,
+): Future[string] {.async: (raises: [CancelledError, LPStreamError, MultiStreamError]).} =
+  trace "Starting multistream negotiation", conn, handshaked = active
   var handshaked = active
-  try:
-    while not conn.atEof:
-      var ms = string.fromBytes(await conn.readLp(MsgSize))
-      validateSuffix(ms)
+  while not conn.atEof:
+    var ms = string.fromBytes(await conn.readLp(MsgSize))
+    validateSuffix(ms)
 
-      if not handshaked and ms != Codec:
-        notice "expected handshake message", conn, instead=ms
-        raise newException(CatchableError,
-                           "MultistreamSelect handling failed, invalid first message")
+    if not handshaked and ms != Codec:
+      debug "expected handshake message", conn, instead = ms
+      raise (ref MultiStreamError)(
+        msg: "MultistreamSelect handling failed, invalid first message"
+      )
 
-      trace "handle: got request", conn, ms
-      if ms.len() <= 0:
-        trace "handle: invalid proto", conn
-        await conn.write(Na)
+    trace "handle: got request", conn, ms
+    if ms.len() <= 0:
+      trace "handle: invalid proto", conn
+      await conn.writeLp(Na)
 
-      if m.handlers.len() == 0:
-        trace "handle: sending `na` for protocol", conn, protocol = ms
-        await conn.write(Na)
-        continue
-
-      case ms:
-      of "ls":
-        trace "handle: listing protos", conn
-        var protos = ""
-        for h in m.handlers:
-          for proto in h.protos:
-            protos &= (proto & "\n")
-        await conn.writeLp(protos)
-      of Codec:
-        if not handshaked:
-          await conn.write(m.codec)
-          handshaked = true
-        else:
-          trace "handle: sending `na` for duplicate handshake while handshaked",
-            conn
-          await conn.write(Na)
+    case ms
+    of "ls":
+      trace "handle: listing protos", conn
+      #TODO this doens't seem to follow spec, each protocol
+      # should be length prefixed. Not very important
+      # since LS is getting deprecated
+      await conn.writeLp(protos.join("\n") & "\n")
+    of Codec:
+      if not handshaked:
+        await conn.writeLp(Codec & "\n")
+        handshaked = true
       else:
-        for h in m.handlers:
-          if (not isNil(h.match) and h.match(ms)) or h.protos.contains(ms):
-            trace "found handler", conn, protocol = ms
+        trace "handle: sending `na` for duplicate handshake while handshaked", conn
+        await conn.writeLp(Na)
+    elif ms in protos or matchers.anyIt(it(ms)):
+      trace "found handler", conn, protocol = ms
+      await conn.writeLp(ms & "\n")
+      conn.protocol = ms
+      return ms
+    else:
+      trace "no handlers", conn, protocol = ms
+      await conn.writeLp(Na)
 
-            var protocolHolder = h
-            let maxIncomingStreams = protocolHolder.protocol.maxIncomingStreams
-            if protocolHolder.openedStreams.getOrDefault(conn.peerId) >= maxIncomingStreams:
-              debug "Max streams for protocol reached, blocking new stream",
-                conn, protocol = ms, maxIncomingStreams
-              return
-            protocolHolder.openedStreams.inc(conn.peerId)
-            try:
-              await conn.writeLp(ms & "\n")
-              conn.protocol = ms
-              await protocolHolder.protocol.handler(conn, ms)
-            finally:
-              protocolHolder.openedStreams.inc(conn.peerId, -1)
-              if protocolHolder.openedStreams[conn.peerId] == 0:
-                protocolHolder.openedStreams.del(conn.peerId)
-            return
-        debug "no handlers", conn, protocol = ms
-        await conn.write(Na)
+proc handle*(
+    m: MultistreamSelect, conn: Connection, active: bool = false
+) {.async: (raises: [CancelledError]).} =
+  trace "Starting multistream handler", conn, handshaked = active
+  var
+    protos: seq[string]
+    matchers: seq[Matcher]
+  for h in m.handlers:
+    if h.match != nil:
+      matchers.add(h.match)
+    for proto in h.protos:
+      protos.add(proto)
+
+  try:
+    let ms = await MultistreamSelect.handle(conn, protos, matchers, active)
+    for h in m.handlers:
+      if (h.match != nil and h.match(ms)) or h.protos.contains(ms):
+        trace "found handler", conn, protocol = ms
+
+        var protocolHolder = h
+        let maxIncomingStreams = protocolHolder.protocol.maxIncomingStreams
+        if protocolHolder.openedStreams.getOrDefault(conn.peerId) >= maxIncomingStreams:
+          debug "Max streams for protocol reached, blocking new stream",
+            conn, protocol = ms, maxIncomingStreams
+          return
+        protocolHolder.openedStreams.inc(conn.peerId)
+        try:
+          await protocolHolder.protocol.handler(conn, ms)
+        finally:
+          protocolHolder.openedStreams.inc(conn.peerId, -1)
+          if protocolHolder.openedStreams[conn.peerId] == 0:
+            protocolHolder.openedStreams.del(conn.peerId)
+        return
+    debug "no handlers", conn, ms
   except CancelledError as exc:
     raise exc
   except CatchableError as exc:
@@ -200,37 +218,65 @@ proc handle*(m: MultistreamSelect, conn: Connection, active: bool = false) {.asy
 
   trace "Stopped multistream handler", conn
 
-proc addHandler*(m: MultistreamSelect,
-                 codecs: seq[string],
-                 protocol: LPProtocol,
-                 matcher: Matcher = nil) =
+proc addHandler*(
+    m: MultistreamSelect,
+    codecs: seq[string],
+    protocol: LPProtocol,
+    matcher: Matcher = nil,
+) =
   trace "registering protocols", protos = codecs
-  m.handlers.add(HandlerHolder(protos: codecs,
-                               protocol: protocol,
-                               match: matcher))
+  m.handlers.add(HandlerHolder(protos: codecs, protocol: protocol, match: matcher))
 
-proc addHandler*(m: MultistreamSelect,
-                 codec: string,
-                 protocol: LPProtocol,
-                 matcher: Matcher = nil) =
+proc addHandler*(
+    m: MultistreamSelect, codec: string, protocol: LPProtocol, matcher: Matcher = nil
+) =
   addHandler(m, @[codec], protocol, matcher)
 
-proc addHandler*(m: MultistreamSelect,
-                 codec: string,
-                 handler: LPProtoHandler,
-                 matcher: Matcher = nil) =
+proc addHandler*[E](
+    m: MultistreamSelect,
+    codec: string,
+    handler:
+      LPProtoHandler |
+      proc(conn: Connection, proto: string): InternalRaisesFuture[void, E],
+    matcher: Matcher = nil,
+) =
   ## helper to allow registering pure handlers
   trace "registering proto handler", proto = codec
   let protocol = new LPProtocol
   protocol.codec = codec
   protocol.handler = handler
 
-  m.handlers.add(HandlerHolder(protos: @[codec],
-                               protocol: protocol,
-                               match: matcher))
+  m.handlers.add(HandlerHolder(protos: @[codec], protocol: protocol, match: matcher))
 
-proc start*(m: MultistreamSelect) {.async.} =
-  await allFutures(m.handlers.mapIt(it.protocol.start()))
+proc start*(m: MultistreamSelect) {.async: (raises: [CancelledError]).} =
+  # Nim 1.6.18: Using `mapIt` results in a seq of `.Raising([])`
+  # TODO https://github.com/nim-lang/Nim/issues/23445
+  var futs = newSeqOfCap[Future[void].Raising([CancelledError])](m.handlers.len)
+  for it in m.handlers:
+    futs.add it.protocol.start()
+  try:
+    await allFutures(futs)
+    for fut in futs:
+      await fut
+  except CancelledError as exc:
+    var pending: seq[Future[void].Raising([])]
+    doAssert m.handlers.len == futs.len, "Handlers modified while starting"
+    for i, fut in futs:
+      if not fut.finished:
+        pending.add fut.cancelAndWait()
+      elif fut.completed:
+        pending.add m.handlers[i].protocol.stop()
+      else:
+        static:
+          doAssert typeof(fut).E is (CancelledError,)
+    await noCancel allFutures(pending)
+    raise exc
 
-proc stop*(m: MultistreamSelect) {.async.} =
-  await allFutures(m.handlers.mapIt(it.protocol.stop()))
+proc stop*(m: MultistreamSelect) {.async: (raises: []).} =
+  # Nim 1.6.18: Using `mapIt` results in a seq of `.Raising([CancelledError])`
+  var futs = newSeqOfCap[Future[void].Raising([])](m.handlers.len)
+  for it in m.handlers:
+    futs.add it.protocol.stop()
+  await noCancel allFutures(futs)
+  for fut in futs:
+    await fut

libp2p/muxers/mplex/coder.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,35 +7,25 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import pkg/[chronos, nimcrypto/utils, chronicles, stew/byteutils]
-import ../../stream/connection,
-       ../../utility,
-       ../../varint,
-       ../../vbuffer,
-       ../muxer
+import pkg/[chronos, chronicles, stew/byteutils]
+import ../../stream/connection, ../../utility, ../../varint, ../../vbuffer, ../muxer
 
 logScope:
   topics = "libp2p mplexcoder"
 
 type
   MessageType* {.pure.} = enum
-    New,
-    MsgIn,
-    MsgOut,
-    CloseIn,
-    CloseOut,
-    ResetIn,
+    New
+    MsgIn
+    MsgOut
+    CloseIn
+    CloseOut
+    ResetIn
     ResetOut
 
-  Msg* = tuple
-    id: uint64
-    msgType: MessageType
-    data: seq[byte]
+  Msg* = tuple[id: uint64, msgType: MessageType, data: seq[byte]]
 
   InvalidMplexMsgType* = object of MuxerError
 
@@ -45,7 +35,9 @@ const MaxMsgSize* = 1 shl 20 # 1mb
 proc newInvalidMplexMsgType*(): ref InvalidMplexMsgType =
   newException(InvalidMplexMsgType, "invalid message type")
 
-proc readMsg*(conn: Connection): Future[Msg] {.async, gcsafe.} =
+proc readMsg*(
+    conn: Connection
+): Future[Msg] {.async: (raises: [CancelledError, LPStreamError, MuxerError]).} =
   let header = await conn.readVarint()
   trace "read header varint", varint = header, conn
 
@@ -58,10 +50,9 @@ proc readMsg*(conn: Connection): Future[Msg] {.async, gcsafe.} =
 
   return (header shr 3, MessageType(msgType), data)
 
-proc writeMsg*(conn: Connection,
-               id: uint64,
-               msgType: MessageType,
-               data: seq[byte] = @[]): Future[void] =
+proc writeMsg*(
+    conn: Connection, id: uint64, msgType: MessageType, data: seq[byte] = @[]
+): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   var
     left = data.len
     offset = 0
@@ -69,8 +60,11 @@ proc writeMsg*(conn: Connection,
 
   # Split message into length-prefixed chunks
   while left > 0 or data.len == 0:
-    let
-      chunkSize = if left > MaxMsgSize: MaxMsgSize - 64 else: left
+    let chunkSize =
+      if left > MaxMsgSize:
+        MaxMsgSize - 64
+      else:
+        left
 
     buf.writePBVarint(id shl 3 or ord(msgType).uint64)
     buf.writeSeq(data.toOpenArray(offset, offset + chunkSize - 1))
@@ -87,8 +81,7 @@ proc writeMsg*(conn: Connection,
   # message gets written before some of the chunks
   conn.write(buf.buffer)
 
-proc writeMsg*(conn: Connection,
-               id: uint64,
-               msgType: MessageType,
-               data: string): Future[void] =
+proc writeMsg*(
+    conn: Connection, id: uint64, msgType: MessageType, data: string
+): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   conn.writeMsg(id, msgType, data.toBytes())

libp2p/muxers/mplex/lpchannel.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,17 +7,12 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[oids, strformat]
-import pkg/[chronos, chronicles, metrics, nimcrypto/utils]
-import ./coder,
-       ../muxer,
-       ../../stream/[bufferstream, connection, streamseq],
-       ../../peerinfo
+import pkg/[chronos, chronicles, metrics]
+import
+  ./coder, ../muxer, ../../stream/[bufferstream, connection, streamseq], ../../peerinfo
 
 export connection
 
@@ -25,13 +20,15 @@ logScope:
   topics = "libp2p mplexchannel"
 
 when defined(libp2p_mplex_metrics):
-  declareHistogram libp2p_mplex_qlen, "message queue length",
+  declareHistogram libp2p_mplex_qlen,
+    "message queue length",
     buckets = [0.0, 1.0, 2.0, 4.0, 8.0, 16.0, 32.0, 64.0, 128.0, 256.0, 512.0]
   declareCounter libp2p_mplex_qlenclose, "closed because of max queuelen"
   declareHistogram libp2p_mplex_qtime, "message queuing time"
 
 when defined(libp2p_network_protocols_metrics):
-  declareCounter libp2p_protocols_bytes, "total sent or received bytes", ["protocol", "direction"]
+  declareCounter libp2p_protocols_bytes,
+    "total sent or received bytes", ["protocol", "direction"]
 
 ## Channel half-closed states
 ##
@@ -45,38 +42,41 @@ when defined(libp2p_network_protocols_metrics):
 ## EOF marker
 
 const
-  MaxWrites = 1024 ##\
+  MaxWrites = 1024
+    ##\
     ## Maximum number of in-flight writes - after this, we disconnect the peer
 
   LPChannelTrackerName* = "LPChannel"
 
-type
-  LPChannel* = ref object of BufferStream
-    id*: uint64                   # channel id
-    name*: string                 # name of the channel (for debugging)
-    conn*: Connection             # wrapped connection used to for writing
-    initiator*: bool              # initiated remotely or locally flag
-    isOpen*: bool                 # has channel been opened
-    closedLocal*: bool            # has channel been closed locally
-    remoteReset*: bool            # has channel been remotely reset
-    localReset*: bool             # has channel been reset locally
-    msgCode*: MessageType         # cached in/out message code
-    closeCode*: MessageType       # cached in/out close code
-    resetCode*: MessageType       # cached in/out reset code
-    writes*: int                  # In-flight writes
+type LPChannel* = ref object of BufferStream
+  id*: uint64 # channel id
+  name*: string # name of the channel (for debugging)
+  conn*: Connection # wrapped connection used to for writing
+  initiator*: bool # initiated remotely or locally flag
+  isOpen*: bool # has channel been opened
+  closedLocal*: bool # has channel been closed locally
+  remoteReset*: bool # has channel been remotely reset
+  localReset*: bool # has channel been reset locally
+  msgCode*: MessageType # cached in/out message code
+  closeCode*: MessageType # cached in/out close code
+  resetCode*: MessageType # cached in/out reset code
+  writes*: int # In-flight writes
 
 func shortLog*(s: LPChannel): auto =
   try:
-    if s.isNil: "LPChannel(nil)"
+    if s == nil:
+      "LPChannel(nil)"
     elif s.name != $s.oid and s.name.len > 0:
       &"{shortLog(s.conn.peerId)}:{s.oid}:{s.name}"
-    else: &"{shortLog(s.conn.peerId)}:{s.oid}"
+    else:
+      &"{shortLog(s.conn.peerId)}:{s.oid}"
   except ValueError as exc:
-    raise newException(Defect, exc.msg)
+    raiseAssert(exc.msg)
 
-chronicles.formatIt(LPChannel): shortLog(it)
+chronicles.formatIt(LPChannel):
+  shortLog(it)
 
-proc open*(s: LPChannel) {.async, gcsafe.} =
+proc open*(s: LPChannel) {.async: (raises: [CancelledError, LPStreamError]).} =
   trace "Opening channel", s, conn = s.conn
   if s.conn.isClosed:
     return
@@ -85,20 +85,20 @@ proc open*(s: LPChannel) {.async, gcsafe.} =
     s.isOpen = true
   except CancelledError as exc:
     raise exc
-  except CatchableError as exc:
+  except LPStreamError as exc:
     await s.conn.close()
     raise exc
 
 method closed*(s: LPChannel): bool =
   s.closedLocal
 
-proc closeUnderlying(s: LPChannel): Future[void] {.async.} =
+proc closeUnderlying(s: LPChannel): Future[void] {.async: (raises: []).} =
   ## Channels may be closed for reading and writing in any order - we'll close
   ## the underlying bufferstream when both directions are closed
   if s.closedLocal and s.atEof():
     await procCall BufferStream(s).close()
 
-proc reset*(s: LPChannel) {.async, gcsafe.} =
+proc reset*(s: LPChannel) {.async: (raises: []).} =
   if s.isClosed:
     trace "Already closed", s
     return
@@ -111,22 +111,21 @@ proc reset*(s: LPChannel) {.async, gcsafe.} =
 
   if s.isOpen and not s.conn.isClosed:
     # If the connection is still active, notify the other end
-    proc resetMessage() {.async.} =
+    proc resetMessage() {.async: (raises: []).} =
       try:
         trace "sending reset message", s, conn = s.conn
-        await s.conn.writeMsg(s.id, s.resetCode) # write reset
-      except CatchableError as exc:
-        # No cancellations
-        await s.conn.close()
+        await noCancel s.conn.writeMsg(s.id, s.resetCode) # write reset
+      except LPStreamError as exc:
         trace "Can't send reset message", s, conn = s.conn, msg = exc.msg
+        await s.conn.close()
 
     asyncSpawn resetMessage()
 
-  await s.closeImpl() # noraises, nocancels
+  await s.closeImpl()
 
   trace "Channel reset", s
 
-method close*(s: LPChannel) {.async, gcsafe.} =
+method close*(s: LPChannel) {.async: (raises: []).} =
   ## Close channel for writing - a message will be sent to the other peer
   ## informing them that the channel is closed and that we're waiting for
   ## their acknowledgement.
@@ -140,10 +139,9 @@ method close*(s: LPChannel) {.async, gcsafe.} =
   if s.isOpen and not s.conn.isClosed:
     try:
       await s.conn.writeMsg(s.id, s.closeCode) # write close
-    except CancelledError as exc:
+    except CancelledError:
       await s.conn.close()
-      raise exc
-    except CatchableError as exc:
+    except LPStreamError as exc:
       # It's harmless that close message cannot be sent - the connection is
       # likely down already
       await s.conn.close()
@@ -157,16 +155,15 @@ method initStream*(s: LPChannel) =
   if s.objName.len == 0:
     s.objName = LPChannelTrackerName
 
-  s.timeoutHandler = proc(): Future[void] {.gcsafe.} =
+  s.timeoutHandler = proc(): Future[void] {.async: (raises: [], raw: true).} =
     trace "Idle timeout expired, resetting LPChannel", s
     s.reset()
 
   procCall BufferStream(s).initStream()
 
-method readOnce*(s: LPChannel,
-                 pbytes: pointer,
-                 nbytes: int):
-                 Future[int] {.async.} =
+method readOnce*(
+    s: LPChannel, pbytes: pointer, nbytes: int
+): Future[int] {.async: (raises: [CancelledError, LPStreamError]).} =
   ## Mplex relies on reading being done regularly from every channel, or all
   ## channels are blocked - in particular, this means that reading from one
   ## channel must not be done from within a callback / read handler of another
@@ -183,21 +180,24 @@ method readOnce*(s: LPChannel,
     let bytes = await procCall BufferStream(s).readOnce(pbytes, nbytes)
     when defined(libp2p_network_protocols_metrics):
       if s.protocol.len > 0:
-        libp2p_protocols_bytes.inc(bytes.int64, labelValues=[s.protocol, "in"])
+        libp2p_protocols_bytes.inc(bytes.int64, labelValues = [s.protocol, "in"])
 
     trace "readOnce", s, bytes
     if bytes == 0:
       await s.closeUnderlying()
     return bytes
-  except CatchableError as exc:
-    # readOnce in BufferStream generally raises on EOF or cancellation - for
-    # the former, resetting is harmless, for the latter it's necessary because
-    # data has been lost in s.readBuf and there's no way to gracefully recover /
-    # use the channel any more
+  except CancelledError as exc:
+    await s.reset()
+    raise exc
+  except LPStreamError as exc:
+    # Resetting is necessary because data has been lost in s.readBuf and
+    # there's no way to gracefully recover / use the channel any more
     await s.reset()
     raise newLPStreamConnDownError(exc)
 
-proc prepareWrite(s: LPChannel, msg: seq[byte]): Future[void] {.async.} =
+proc prepareWrite(
+    s: LPChannel, msg: seq[byte]
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   # prepareWrite is the slow path of writing a message - see conditions in
   # write
   if s.remoteReset:
@@ -214,7 +214,7 @@ proc prepareWrite(s: LPChannel, msg: seq[byte]): Future[void] {.async.} =
     debug "Closing connection, too many in-flight writes on channel",
       s, conn = s.conn, writes = s.writes
     when defined(libp2p_mplex_metrics):
-        libp2p_mplex_qlenclose.inc()
+      libp2p_mplex_qlenclose.inc()
     await s.reset()
     await s.conn.close()
     return
@@ -225,7 +225,10 @@ proc prepareWrite(s: LPChannel, msg: seq[byte]): Future[void] {.async.} =
   await s.conn.writeMsg(s.id, s.msgCode, msg)
 
 proc completeWrite(
-    s: LPChannel, fut: Future[void], msgLen: int): Future[void] {.async.} =
+    s: LPChannel,
+    fut: Future[void].Raising([CancelledError, LPStreamError]),
+    msgLen: int,
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   try:
     s.writes += 1
 
@@ -236,9 +239,11 @@ proc completeWrite(
     else:
       await fut
 
-    when defined(libp2p_network_protocol_metrics):
+    when defined(libp2p_network_protocols_metrics):
       if s.protocol.len > 0:
-        libp2p_protocols_bytes.inc(msgLen.int64, labelValues=[s.protocol, "out"])
+        # This crashes on Nim 2.0.2 with `--mm:orc` during `nimble test`
+        # https://github.com/status-im/nim-metrics/issues/79
+        libp2p_protocols_bytes.inc(msgLen.int64, labelValues = [s.protocol, "out"])
 
     s.activity = true
   except CancelledError as exc:
@@ -250,7 +255,7 @@ proc completeWrite(
     raise exc
   except LPStreamEOFError as exc:
     raise exc
-  except CatchableError as exc:
+  except LPStreamError as exc:
     trace "exception in lpchannel write handler", s, msg = exc.msg
     await s.reset()
     await s.conn.close()
@@ -258,12 +263,13 @@ proc completeWrite(
   finally:
     s.writes -= 1
 
-method write*(s: LPChannel, msg: seq[byte]): Future[void] =
+method write*(
+    s: LPChannel, msg: seq[byte]
+): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   ## Write to mplex channel - there may be up to MaxWrite concurrent writes
   ## pending after which the peer is disconnected
 
-  let
-    closed = s.closedLocal or s.conn.closed
+  let closed = s.closedLocal or s.conn.closed
 
   let fut =
     if (not closed) and msg.len > 0 and s.writes < MaxWrites and s.isOpen:
@@ -276,16 +282,17 @@ method write*(s: LPChannel, msg: seq[byte]): Future[void] =
 
   s.completeWrite(fut, msg.len)
 
-method getWrapped*(s: LPChannel): Connection = s.conn
+method getWrapped*(s: LPChannel): Connection =
+  s.conn
 
 proc init*(
-  L: type LPChannel,
-  id: uint64,
-  conn: Connection,
-  initiator: bool,
-  name: string = "",
-  timeout: Duration = DefaultChanTimeout): LPChannel =
-
+    L: type LPChannel,
+    id: uint64,
+    conn: Connection,
+    initiator: bool,
+    name: string = "",
+    timeout: Duration = DefaultChanTimeout,
+): LPChannel =
   let chann = L(
     id: id,
     name: name,
@@ -296,12 +303,17 @@ proc init*(
     msgCode: if initiator: MessageType.MsgOut else: MessageType.MsgIn,
     closeCode: if initiator: MessageType.CloseOut else: MessageType.CloseIn,
     resetCode: if initiator: MessageType.ResetOut else: MessageType.ResetIn,
-    dir: if initiator: Direction.Out else: Direction.In)
+    dir: if initiator: Direction.Out else: Direction.In,
+  )
 
   chann.initStream()
 
   when chronicles.enabledLogLevel == LogLevel.TRACE:
-    chann.name = if chann.name.len > 0: chann.name else: $chann.oid
+    chann.name =
+      if chann.name.len > 0:
+        chann.name
+      else:
+        $chann.oid
 
   trace "Created new lpchannel", s = chann, id, initiator
 

libp2p/muxers/mplex/mplex.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,20 +7,18 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables, sequtils, oids
 import chronos, chronicles, stew/byteutils, metrics
-import ../muxer,
-       ../../stream/connection,
-       ../../stream/bufferstream,
-       ../../utility,
-       ../../peerinfo,
-       ./coder,
-       ./lpchannel
+import
+  ../muxer,
+  ../../stream/connection,
+  ../../stream/bufferstream,
+  ../../utility,
+  ../../peerinfo,
+  ./coder,
+  ./lpchannel
 
 export muxer
 
@@ -29,12 +27,10 @@ logScope:
 
 const MplexCodec* = "/mplex/6.7.0"
 
-const
-  MaxChannelCount = 200
+const MaxChannelCount = 200
 
 when defined(libp2p_expensive_metrics):
-  declareGauge(libp2p_mplex_channels,
-    "mplex channels", labels = ["initiator", "peer"])
+  declareGauge(libp2p_mplex_channels, "mplex channels", labels = ["initiator", "peer"])
 
 type
   InvalidChannelIdError* = object of MuxerError
@@ -51,7 +47,8 @@ type
 func shortLog*(m: Mplex): auto =
   shortLog(m.connection)
 
-chronicles.formatIt(Mplex): shortLog(it)
+chronicles.formatIt(Mplex):
+  shortLog(it)
 
 proc newTooManyChannels(): ref TooManyChannels =
   newException(TooManyChannels, "max allowed channel count exceeded")
@@ -59,7 +56,7 @@ proc newTooManyChannels(): ref TooManyChannels =
 proc newInvalidChannelIdError(): ref InvalidChannelIdError =
   newException(InvalidChannelIdError, "max allowed channel count exceeded")
 
-proc cleanupChann(m: Mplex, chann: LPChannel) {.async, inline.} =
+proc cleanupChann(m: Mplex, chann: LPChannel) {.async: (raises: []), inline.} =
   ## remove the local channel from the internal tables
   ##
   try:
@@ -70,31 +67,31 @@ proc cleanupChann(m: Mplex, chann: LPChannel) {.async, inline.} =
     when defined(libp2p_expensive_metrics):
       libp2p_mplex_channels.set(
         m.channels[chann.initiator].len.int64,
-        labelValues = [$chann.initiator, $m.connection.peerId])
-  except CatchableError as exc:
+        labelValues = [$chann.initiator, $m.connection.peerId],
+      )
+  except CancelledError as exc:
     warn "Error cleaning up mplex channel", m, chann, msg = exc.msg
 
-proc newStreamInternal*(m: Mplex,
-                        initiator: bool = true,
-                        chanId: uint64 = 0,
-                        name: string = "",
-                        timeout: Duration): LPChannel
-                        {.gcsafe, raises: [Defect, InvalidChannelIdError].} =
+proc newStreamInternal*(
+    m: Mplex,
+    initiator: bool = true,
+    chanId: uint64 = 0,
+    name: string = "",
+    timeout: Duration,
+): LPChannel {.gcsafe, raises: [InvalidChannelIdError].} =
   ## create new channel/stream
   ##
-  let id = if initiator:
-    m.currentId.inc(); m.currentId
-    else: chanId
+  let id =
+    if initiator:
+      m.currentId.inc()
+      m.currentId
+    else:
+      chanId
 
   if id in m.channels[initiator]:
     raise newInvalidChannelIdError()
 
-  result = LPChannel.init(
-    id,
-    m.connection,
-    initiator,
-    name,
-    timeout = timeout)
+  result = LPChannel.init(id, m.connection, initiator, name, timeout = timeout)
 
   result.peerId = m.connection.peerId
   result.observedAddr = m.connection.observedAddr
@@ -111,21 +108,17 @@ proc newStreamInternal*(m: Mplex,
 
   when defined(libp2p_expensive_metrics):
     libp2p_mplex_channels.set(
-      m.channels[initiator].len.int64,
-      labelValues = [$initiator, $m.connection.peerId])
+      m.channels[initiator].len.int64, labelValues = [$initiator, $m.connection.peerId]
+    )
 
-proc handleStream(m: Mplex, chann: LPChannel) {.async.} =
+proc handleStream(m: Mplex, chann: LPChannel) {.async: (raises: []).} =
   ## call the muxer stream handler for this channel
   ##
-  try:
-    await m.streamHandler(chann)
-    trace "finished handling stream", m, chann
-    doAssert(chann.closed, "connection not closed by handler!")
-  except CatchableError as exc:
-    trace "Exception in mplex stream handler", m, chann, msg = exc.msg
-    await chann.reset()
+  await m.streamHandler(chann)
+  trace "finished handling stream", m, chann
+  doAssert(chann.closed, "connection not closed by handler!")
 
-method handle*(m: Mplex) {.async, gcsafe.} =
+method handle*(m: Mplex) {.async: (raises: []).} =
   trace "Starting mplex handler", m
   try:
     while not m.connection.atEof:
@@ -153,7 +146,7 @@ method handle*(m: Mplex) {.async, gcsafe.} =
         else:
           if m.channels[false].len > m.maxChannCount - 1:
             warn "too many channels created by remote peer",
-                  allowedMax = MaxChannelCount, m
+              allowedMax = MaxChannelCount, m
             raise newTooManyChannels()
 
           let name = string.fromBytes(data)
@@ -161,59 +154,64 @@ method handle*(m: Mplex) {.async, gcsafe.} =
 
       trace "Processing channel message", m, channel, data = data.shortLog
 
-      case msgType:
-        of MessageType.New:
-          trace "created channel", m, channel
+      case msgType
+      of MessageType.New:
+        trace "created channel", m, channel
 
-          if not isNil(m.streamHandler):
-            # Launch handler task
-            # All the errors are handled inside `handleStream()` procedure.
-            asyncSpawn m.handleStream(channel)
+        if m.streamHandler != nil:
+          # Launch handler task
+          # All the errors are handled inside `handleStream()` procedure.
+          asyncSpawn m.handleStream(channel)
+      of MessageType.MsgIn, MessageType.MsgOut:
+        if data.len > MaxMsgSize:
+          warn "attempting to send a packet larger than allowed",
+            allowed = MaxMsgSize, channel
+          raise newLPStreamLimitError()
 
-        of MessageType.MsgIn, MessageType.MsgOut:
-          if data.len > MaxMsgSize:
-            warn "attempting to send a packet larger than allowed",
-                 allowed = MaxMsgSize, channel
-            raise newLPStreamLimitError()
-
-          trace "pushing data to channel", m, channel, len = data.len
-          try:
-            await channel.pushData(data)
-            trace "pushed data to channel", m, channel, len = data.len
-          except LPStreamClosedError as exc:
-            # Channel is being closed, but `cleanupChann` was not yet triggered.
-            trace "pushing data to channel failed", m, channel, len = data.len,
-              msg = exc.msg
-            discard  # Ignore message, same as if `cleanupChann` had completed.
-
-        of MessageType.CloseIn, MessageType.CloseOut:
-          await channel.pushEof()
-        of MessageType.ResetIn, MessageType.ResetOut:
-          channel.remoteReset = true
-          await channel.reset()
+        trace "pushing data to channel", m, channel, len = data.len
+        try:
+          await channel.pushData(data)
+          trace "pushed data to channel", m, channel, len = data.len
+        except LPStreamClosedError as exc:
+          # Channel is being closed, but `cleanupChann` was not yet triggered.
+          trace "pushing data to channel failed",
+            m, channel, len = data.len, msg = exc.msg
+          discard # Ignore message, same as if `cleanupChann` had completed.
+      of MessageType.CloseIn, MessageType.CloseOut:
+        await channel.pushEof()
+      of MessageType.ResetIn, MessageType.ResetOut:
+        channel.remoteReset = true
+        await channel.reset()
   except CancelledError:
     debug "Unexpected cancellation in mplex handler", m
   except LPStreamEOFError as exc:
     trace "Stream EOF", m, msg = exc.msg
-  except CatchableError as exc:
-    debug "Unexpected exception in mplex read loop", m, msg = exc.msg
+  except LPStreamError as exc:
+    debug "Unexpected stream exception in mplex read loop", m, msg = exc.msg
+  except MuxerError as exc:
+    debug "Unexpected muxer exception in mplex read loop", m, msg = exc.msg
   finally:
     await m.close()
   trace "Stopped mplex handler", m
 
-proc new*(M: type Mplex,
-           conn: Connection,
-           inTimeout, outTimeout: Duration = DefaultChanTimeout,
-           maxChannCount: int = MaxChannelCount): Mplex =
-  M(connection: conn,
+proc new*(
+    M: type Mplex,
+    conn: Connection,
+    inTimeout: Duration = DefaultChanTimeout,
+    outTimeout: Duration = DefaultChanTimeout,
+    maxChannCount: int = MaxChannelCount,
+): Mplex =
+  M(
+    connection: conn,
     inChannTimeout: inTimeout,
     outChannTimeout: outTimeout,
     oid: genOid(),
-    maxChannCount: maxChannCount)
+    maxChannCount: maxChannCount,
+  )
 
-method newStream*(m: Mplex,
-                  name: string = "",
-                  lazy: bool = false): Future[Connection] {.async, gcsafe.} =
+method newStream*(
+    m: Mplex, name: string = "", lazy: bool = false
+): Future[Connection] {.async: (raises: [CancelledError, LPStreamError, MuxerError]).} =
   let channel = m.newStreamInternal(timeout = m.inChannTimeout)
 
   if not lazy:
@@ -221,7 +219,7 @@ method newStream*(m: Mplex,
 
   return Connection(channel)
 
-method close*(m: Mplex) {.async, gcsafe.} =
+method close*(m: Mplex) {.async: (raises: []).} =
   if m.isClosed:
     trace "Already closed", m
     return
@@ -248,3 +246,9 @@ method close*(m: Mplex) {.async, gcsafe.} =
   m.channels[true].clear()
 
   trace "Closed mplex", m
+
+method getStreams*(m: Mplex): seq[Connection] =
+  for c in m.channels[false].values:
+    result.add(c)
+  for c in m.channels[true].values:
+    result.add(c)

libp2p/muxers/muxer.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,86 +7,65 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import chronos, chronicles
-import ../protocols/protocol,
-       ../stream/connection,
-       ../errors
+import ../stream/connection, ../errors
 
 logScope:
   topics = "libp2p muxer"
 
-const
-  DefaultChanTimeout* = 5.minutes
+const DefaultChanTimeout* = 5.minutes
 
 type
   MuxerError* = object of LPError
   TooManyChannels* = object of MuxerError
 
-  StreamHandler* = proc(conn: Connection): Future[void] {.gcsafe, raises: [Defect].}
-  MuxerHandler* = proc(muxer: Muxer): Future[void] {.gcsafe, raises: [Defect].}
+  StreamHandler* = proc(conn: Connection): Future[void] {.async: (raises: []).}
+  MuxerHandler* = proc(muxer: Muxer): Future[void] {.async: (raises: []).}
 
   Muxer* = ref object of RootObj
     streamHandler*: StreamHandler
+    handler*: Future[void].Raising([])
     connection*: Connection
 
   # user provider proc that returns a constructed Muxer
-  MuxerConstructor* = proc(conn: Connection): Muxer {.gcsafe, closure, raises: [Defect].}
+  MuxerConstructor* = proc(conn: Connection): Muxer {.gcsafe, closure, raises: [].}
 
   # this wraps a creator proc that knows how to make muxers
-  MuxerProvider* = ref object of LPProtocol
+  MuxerProvider* = object
     newMuxer*: MuxerConstructor
-    streamHandler*: StreamHandler # triggered every time there is a new stream, called for any muxer instance
-    muxerHandler*: MuxerHandler # triggered every time there is a new muxed connection created
+    codec*: string
 
-func shortLog*(m: Muxer): auto = shortLog(m.connection)
-chronicles.formatIt(Muxer): shortLog(it)
+func shortLog*(m: Muxer): auto =
+  if m == nil:
+    "nil"
+  else:
+    shortLog(m.connection)
+
+chronicles.formatIt(Muxer):
+  shortLog(it)
 
 # muxer interface
-method newStream*(m: Muxer, name: string = "", lazy: bool = false):
-  Future[Connection] {.base, async, gcsafe.} = discard
-method close*(m: Muxer) {.base, async, gcsafe.} = discard
-method handle*(m: Muxer): Future[void] {.base, async, gcsafe.} = discard
+method newStream*(
+    m: Muxer, name: string = "", lazy: bool = false
+): Future[Connection] {.
+    base, async: (raises: [CancelledError, LPStreamError, MuxerError], raw: true)
+.} =
+  raiseAssert("Not implemented!")
+
+method close*(m: Muxer) {.base, async: (raises: []).} =
+  if m.connection != nil:
+    await m.connection.close()
+
+method handle*(m: Muxer): Future[void] {.base, async: (raises: []).} =
+  discard
 
 proc new*(
-  T: typedesc[MuxerProvider],
-  creator: MuxerConstructor,
-  codec: string): T {.gcsafe.} =
-
-  let muxerProvider = T(newMuxer: creator)
-  muxerProvider.codec = codec
-  muxerProvider.init()
+    T: typedesc[MuxerProvider], creator: MuxerConstructor, codec: string
+): T {.gcsafe.} =
+  let muxerProvider = T(newMuxer: creator, codec: codec)
   muxerProvider
 
-method init(c: MuxerProvider) =
-  proc handler(conn: Connection, proto: string) {.async, gcsafe, closure.} =
-    trace "starting muxer handler", proto=proto, conn
-    try:
-      let
-        muxer = c.newMuxer(conn)
-
-      if not isNil(c.streamHandler):
-        muxer.streamHandler = c.streamHandler
-
-      var futs = newSeq[Future[void]]()
-      futs &= muxer.handle()
-
-      # finally await both the futures
-      if not isNil(c.muxerHandler):
-        await c.muxerHandler(muxer)
-        when defined(libp2p_agents_metrics):
-          conn.shortAgent = muxer.connection.shortAgent
-
-      checkFutures(await allFinished(futs))
-    except CancelledError as exc:
-      raise exc
-    except CatchableError as exc:
-      trace "exception in muxer handler", exc = exc.msg, conn, proto
-    finally:
-      await conn.close()
-
-  c.handler = handler
+method getStreams*(m: Muxer): seq[Connection] {.base.} =
+  raiseAssert("Not implemented!")

libp2p/muxers/yamux/yamux.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,15 +7,11 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import sequtils, std/[tables]
 import chronos, chronicles, metrics, stew/[endians2, byteutils, objects]
-import ../muxer,
-       ../../stream/connection
+import ../muxer, ../../stream/connection
 
 export muxer
 
@@ -25,18 +21,21 @@ logScope:
 const
   YamuxCodec* = "/yamux/1.0.0"
   YamuxVersion = 0.uint8
-  DefaultWindowSize = 256000
+  YamuxDefaultWindowSize* = 256000
+  MaxSendQueueSize = 256000
   MaxChannelCount = 200
 
 when defined(libp2p_yamux_metrics):
-  declareGauge(libp2p_yamux_channels, "yamux channels", labels = ["initiator", "peer"])
-  declareHistogram libp2p_yamux_send_queue, "message send queue length (in byte)",
-    buckets = [0.0, 100.0, 250.0, 1000.0, 2000.0, 1600.0, 6400.0, 25600.0, 256000.0]
-  declareHistogram libp2p_yamux_recv_queue, "message recv queue length (in byte)",
-    buckets = [0.0, 100.0, 250.0, 1000.0, 2000.0, 1600.0, 6400.0, 25600.0, 256000.0]
+  declareGauge libp2p_yamux_channels, "yamux channels", labels = ["initiator", "peer"]
+  declareHistogram libp2p_yamux_send_queue,
+    "message send queue length (in byte)",
+    buckets = [0.0, 100.0, 250.0, 1000.0, 2000.0, 3200.0, 6400.0, 25600.0, 256000.0]
+  declareHistogram libp2p_yamux_recv_queue,
+    "message recv queue length (in byte)",
+    buckets = [0.0, 100.0, 250.0, 1000.0, 2000.0, 3200.0, 6400.0, 25600.0, 256000.0]
 
 type
-  YamuxError* = object of CatchableError
+  YamuxError* = object of MuxerError
 
   MsgType = enum
     Data = 0x0
@@ -51,9 +50,9 @@ type
     Rst
 
   GoAwayStatus = enum
-    NormalTermination = 0x0,
-    ProtocolError = 0x1,
-    InternalError = 0x2,
+    NormalTermination = 0x0
+    ProtocolError = 0x1
+    InternalError = 0x2
 
   YamuxHeader = object
     version: uint8
@@ -62,90 +61,92 @@ type
     streamId: uint32
     length: uint32
 
-proc readHeader(conn: LPStream): Future[YamuxHeader] {.async, gcsafe.} =
+proc readHeader(
+    conn: LPStream
+): Future[YamuxHeader] {.async: (raises: [CancelledError, LPStreamError, MuxerError]).} =
   var buffer: array[12, byte]
   await conn.readExactly(addr buffer[0], 12)
 
   result.version = buffer[0]
-  let flags = fromBytesBE(uint16, buffer[2..3])
-  if not result.msgType.checkedEnumAssign(buffer[1]) or flags notin 0'u16..15'u16:
-     raise newException(YamuxError, "Wrong header")
+  let flags = fromBytesBE(uint16, buffer[2 .. 3])
+  if not result.msgType.checkedEnumAssign(buffer[1]) or flags notin 0'u16 .. 15'u16:
+    raise newException(YamuxError, "Wrong header")
   result.flags = cast[set[MsgFlags]](flags)
-  result.streamId = fromBytesBE(uint32, buffer[4..7])
-  result.length = fromBytesBE(uint32, buffer[8..11])
+  result.streamId = fromBytesBE(uint32, buffer[4 .. 7])
+  result.length = fromBytesBE(uint32, buffer[8 .. 11])
   return result
 
 proc `$`(header: YamuxHeader): string =
-  result = "{" & $header.msgType & ", "
-  result &= "{" & header.flags.foldl(if a != "": a & ", " & $b else: $b, "") & "}, "
-  result &= "streamId: " & $header.streamId & ", "
-  result &= "length: " & $header.length & "}"
+  "{" & $header.msgType & ", " & "{" &
+    header.flags.foldl(
+      if a != "":
+        a & ", " & $b
+      else:
+        $b
+      ,
+      "",
+    ) & "}, " & "streamId: " & $header.streamId & ", " & "length: " & $header.length &
+    "}"
 
 proc encode(header: YamuxHeader): array[12, byte] =
   result[0] = header.version
   result[1] = uint8(header.msgType)
-  result[2..3] = toBytesBE(cast[uint16](header.flags))
-  result[4..7] = toBytesBE(header.streamId)
-  result[8..11] = toBytesBE(header.length)
+  result[2 .. 3] = toBytesBE(uint16(cast[uint8](header.flags)))
+    # workaround https://github.com/nim-lang/Nim/issues/21789
+  result[4 .. 7] = toBytesBE(header.streamId)
+  result[8 .. 11] = toBytesBE(header.length)
 
-proc write(conn: LPStream, header: YamuxHeader): Future[void] {.gcsafe.} =
+proc write(
+    conn: LPStream, header: YamuxHeader
+): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   trace "write directly on stream", h = $header
   var buffer = header.encode()
-  return conn.write(@buffer)
+  conn.write(@buffer)
 
 proc ping(T: type[YamuxHeader], flag: MsgFlags, pingData: uint32): T =
-  T(
-    version: YamuxVersion,
-    msgType: MsgType.Ping,
-    flags: {flag},
-    length: pingData
-  )
+  T(version: YamuxVersion, msgType: MsgType.Ping, flags: {flag}, length: pingData)
 
 proc goAway(T: type[YamuxHeader], status: GoAwayStatus): T =
-  T(
-    version: YamuxVersion,
-    msgType: MsgType.GoAway,
-    length: uint32(status)
-  )
+  T(version: YamuxVersion, msgType: MsgType.GoAway, length: uint32(status))
 
 proc data(
-  T: type[YamuxHeader],
-  streamId: uint32,
-  length: uint32 = 0,
-  flags: set[MsgFlags] = {},
-  ): T =
+    T: type[YamuxHeader],
+    streamId: uint32,
+    length: uint32 = 0,
+    flags: set[MsgFlags] = {},
+): T =
   T(
     version: YamuxVersion,
     msgType: MsgType.Data,
     length: length,
     flags: flags,
-    streamId: streamId
+    streamId: streamId,
   )
 
 proc windowUpdate(
-  T: type[YamuxHeader],
-  streamId: uint32,
-  delta: uint32,
-  flags: set[MsgFlags] = {},
-  ): T =
+    T: type[YamuxHeader], streamId: uint32, delta: uint32, flags: set[MsgFlags] = {}
+): T =
   T(
     version: YamuxVersion,
     msgType: MsgType.WindowUpdate,
     length: delta,
     flags: flags,
-    streamId: streamId
+    streamId: streamId,
   )
 
 type
-  ToSend = tuple
-    data: seq[byte]
-    sent: int
-    fut: Future[void]
+  ToSend =
+    tuple[
+      data: seq[byte],
+      sent: int,
+      fut: Future[void].Raising([CancelledError, LPStreamError]),
+    ]
   YamuxChannel* = ref object of Connection
     id: uint32
     recvWindow: int
     sendWindow: int
     maxRecvWindow: int
+    maxSendQueueSize: int
     conn: Connection
     isSrc: bool
     opened: bool
@@ -154,47 +155,73 @@ type
     recvQueue: seq[byte]
     isReset: bool
     remoteReset: bool
-    closedRemotely: Future[void]
+    closedRemotely: AsyncEvent
     closedLocally: bool
     receivedData: AsyncEvent
-    returnedEof: bool
 
 proc `$`(channel: YamuxChannel): string =
   result = if channel.conn.dir == Out: "=> " else: "<= "
   result &= $channel.id
   var s: seq[string] = @[]
-  if channel.closedRemotely.done():
+  if channel.closedRemotely.isSet():
     s.add("ClosedRemotely")
   if channel.closedLocally:
     s.add("ClosedLocally")
   if channel.isReset:
     s.add("Reset")
   if s.len > 0:
-    result &= " {" & s.foldl(if a != "": a & ", " & b else: b, "") & "}"
+    result &=
+      " {" &
+      s.foldl(
+        if a != "":
+          a & ", " & b
+        else:
+          b
+        ,
+        "",
+      ) & "}"
 
-proc sendQueueBytes(channel: YamuxChannel, limit: bool = false): int =
-  for (elem, sent, _) in channel.sendQueue:
-    result.inc(min(elem.len - sent, if limit: channel.maxRecvWindow div 3 else: elem.len - sent))
+proc lengthSendQueue(channel: YamuxChannel): int =
+  ## Returns the length of what remains to be sent
+  ##
+  channel.sendQueue.foldl(a + b.data.len - b.sent, 0)
 
-proc actuallyClose(channel: YamuxChannel) {.async.} =
+proc lengthSendQueueWithLimit(channel: YamuxChannel): int =
+  ## Returns the length of what remains to be sent, but limit the size of big messages.
+  ##
+  # For leniency, limit big messages size to the third of maxSendQueueSize
+  # This value is arbitrary, it's not in the specs, it permits to store up to
+  # 3 big messages if the peer is stalling.
+  channel.sendQueue.foldl(
+    a + min(b.data.len - b.sent, channel.maxSendQueueSize div 3), 0
+  )
+
+proc actuallyClose(channel: YamuxChannel) {.async: (raises: []).} =
   if channel.closedLocally and channel.sendQueue.len == 0 and
-     channel.closedRemotely.done():
+      channel.closedRemotely.isSet():
     await procCall Connection(channel).closeImpl()
 
-proc remoteClosed(channel: YamuxChannel) {.async.} =
-  if not channel.closedRemotely.done():
-    channel.closedRemotely.complete()
+proc remoteClosed(channel: YamuxChannel) {.async: (raises: []).} =
+  if not channel.closedRemotely.isSet():
+    channel.closedRemotely.fire()
     await channel.actuallyClose()
 
-method closeImpl*(channel: YamuxChannel) {.async, gcsafe.} =
+method closeImpl*(channel: YamuxChannel) {.async: (raises: []).} =
   if not channel.closedLocally:
+    trace "Closing yamux channel locally", streamId = channel.id, conn = channel.conn
     channel.closedLocally = true
 
-    if channel.isReset == false and channel.sendQueue.len == 0:
-      await channel.conn.write(YamuxHeader.data(channel.id, 0, {Fin}))
+    if not channel.isReset and channel.sendQueue.len == 0:
+      try:
+        await channel.conn.write(YamuxHeader.data(channel.id, 0, {Fin}))
+      except CancelledError, LPStreamError:
+        discard
     await channel.actuallyClose()
 
-proc reset(channel: YamuxChannel, isLocal: bool = false) {.async.} =
+proc reset(channel: YamuxChannel, isLocal: bool = false) {.async: (raises: []).} =
+  # If we reset locally, we want to flush up to a maximum of recvWindow
+  # bytes. It's because the peer we're connected to can send us data before
+  # it receives the reset.
   if channel.isReset:
     return
   trace "Reset channel"
@@ -206,66 +233,76 @@ proc reset(channel: YamuxChannel, isLocal: bool = false) {.async.} =
   channel.recvQueue = @[]
   channel.sendWindow = 0
   if not channel.closedLocally:
-    if isLocal:
-      try: await channel.conn.write(YamuxHeader.data(channel.id, 0, {Rst}))
-      except LPStreamEOFError as exc: discard
-      except LPStreamClosedError as exc: discard
+    if isLocal and not channel.isSending:
+      try:
+        await channel.conn.write(YamuxHeader.data(channel.id, 0, {Rst}))
+      except CancelledError, LPStreamError:
+        discard
     await channel.close()
-  if not channel.closedRemotely.done():
+  if not channel.closedRemotely.isSet():
     await channel.remoteClosed()
   channel.receivedData.fire()
   if not isLocal:
-    # If we reset locally, we want to flush up to a maximum of recvWindow
-    # bytes. We use the recvWindow in the proc cleanupChann.
+    # If the reset is remote, there's no reason to flush anything.
     channel.recvWindow = 0
 
-proc updateRecvWindow(channel: YamuxChannel) {.async.} =
+proc updateRecvWindow(
+    channel: YamuxChannel
+) {.async: (raises: [CancelledError, LPStreamError]).} =
+  ## Send to the peer a window update when the recvWindow is empty enough
+  ##
+  # In order to avoid spamming a window update everytime a byte is read,
+  # we send it everytime half of the maxRecvWindow is read.
   let inWindow = channel.recvWindow + channel.recvQueue.len
   if inWindow > channel.maxRecvWindow div 2:
     return
 
   let delta = channel.maxRecvWindow - inWindow
   channel.recvWindow.inc(delta)
-  await channel.conn.write(YamuxHeader.windowUpdate(
-    channel.id,
-    delta.uint32
-  ))
+  await channel.conn.write(YamuxHeader.windowUpdate(channel.id, delta.uint32))
   trace "increasing the recvWindow", delta
 
 method readOnce*(
-  channel: YamuxChannel,
-  pbytes: pointer,
-  nbytes: int):
-  Future[int] {.async.} =
+    channel: YamuxChannel, pbytes: pointer, nbytes: int
+): Future[int] {.async: (raises: [CancelledError, LPStreamError]).} =
+  ## Read from a yamux channel
 
   if channel.isReset:
-    raise if channel.remoteReset:
+    raise
+      if channel.remoteReset:
         newLPStreamResetError()
       elif channel.closedLocally:
         newLPStreamClosedError()
       else:
         newLPStreamConnDownError()
-  if channel.returnedEof:
+  if channel.isEof:
     raise newLPStreamRemoteClosedError()
   if channel.recvQueue.len == 0:
     channel.receivedData.clear()
-    await channel.closedRemotely or channel.receivedData.wait()
-    if channel.closedRemotely.done() and channel.recvQueue.len == 0:
-      channel.returnedEof = true
-      return 0
+    try: # https://github.com/status-im/nim-chronos/issues/516
+      discard await race(channel.closedRemotely.wait(), channel.receivedData.wait())
+    except ValueError:
+      raiseAssert("Futures list is not empty")
+    if channel.closedRemotely.isSet() and channel.recvQueue.len == 0:
+      channel.isEof = true
+      return
+        0 # we return 0 to indicate that the channel is closed for reading from now on
 
   let toRead = min(channel.recvQueue.len, nbytes)
 
   var p = cast[ptr UncheckedArray[byte]](pbytes)
-  toOpenArray(p, 0, nbytes - 1)[0..<toRead] = channel.recvQueue.toOpenArray(0, toRead - 1)
-  channel.recvQueue = channel.recvQueue[toRead..^1]
+  toOpenArray(p, 0, nbytes - 1)[0 ..< toRead] =
+    channel.recvQueue.toOpenArray(0, toRead - 1)
+  channel.recvQueue = channel.recvQueue[toRead ..^ 1]
 
   # We made some room in the recv buffer let the peer know
   await channel.updateRecvWindow()
   channel.activity = true
   return toRead
 
-proc gotDataFromRemote(channel: YamuxChannel, b: seq[byte]) {.async.} =
+proc gotDataFromRemote(
+    channel: YamuxChannel, b: seq[byte]
+) {.async: (raises: [CancelledError, LPStreamError]).} =
   channel.recvWindow -= b.len
   channel.recvQueue = channel.recvQueue.concat(b)
   channel.receivedData.fire()
@@ -276,26 +313,28 @@ proc gotDataFromRemote(channel: YamuxChannel, b: seq[byte]) {.async.} =
 proc setMaxRecvWindow*(channel: YamuxChannel, maxRecvWindow: int) =
   channel.maxRecvWindow = maxRecvWindow
 
-proc trySend(channel: YamuxChannel) {.async.} =
+proc trySend(
+    channel: YamuxChannel
+) {.async: (raises: [CancelledError, LPStreamError]).} =
   if channel.isSending:
     return
   channel.isSending = true
-  defer: channel.isSending = false
+  defer:
+    channel.isSending = false
+
   while channel.sendQueue.len != 0:
     channel.sendQueue.keepItIf(not (it.fut.cancelled() and it.sent == 0))
     if channel.sendWindow == 0:
-      trace "send window empty"
-      if channel.sendQueueBytes(true) > channel.maxRecvWindow:
-        debug "channel send queue too big, resetting", maxSendWindow=channel.maxRecvWindow,
-          currentQueueSize = channel.sendQueueBytes(true)
-        try:
-          await channel.reset(true)
-        except CatchableError as exc:
-          debug "failed to reset", msg=exc.msg
+      trace "trying to send while the sendWindow is empty"
+      if channel.lengthSendQueueWithLimit() > channel.maxSendQueueSize:
+        trace "channel send queue too big, resetting",
+          maxSendQueueSize = channel.maxSendQueueSize,
+          currentQueueSize = channel.lengthSendQueueWithLimit()
+        await channel.reset(isLocal = true)
       break
 
     let
-      bytesAvailable = channel.sendQueueBytes()
+      bytesAvailable = channel.lengthSendQueue()
       toSend = min(channel.sendWindow, bytesAvailable)
     var
       sendBuffer = newSeqUninitialized[byte](toSend + 12)
@@ -306,24 +345,37 @@ proc trySend(channel: YamuxChannel) {.async.} =
       trace "last buffer we'll sent on this channel", toSend, bytesAvailable
       header.flags.incl({Fin})
 
-    sendBuffer[0..<12] = header.encode()
+    sendBuffer[0 ..< 12] = header.encode()
 
-    var futures: seq[Future[void]]
+    var futures: seq[Future[void].Raising([CancelledError, LPStreamError])]
     while inBuffer < toSend:
+      # concatenate the different message we try to send into one buffer
       let (data, sent, fut) = channel.sendQueue[0]
       let bufferToSend = min(data.len - sent, toSend - inBuffer)
-      sendBuffer.toOpenArray(12, 12 + toSend - 1)[inBuffer..<(inBuffer+bufferToSend)] =
-        channel.sendQueue[0].data.toOpenArray(sent, sent + bufferToSend - 1)
+
+      sendBuffer.toOpenArray(12, 12 + toSend - 1)[
+        inBuffer ..< (inBuffer + bufferToSend)
+      ] = channel.sendQueue[0].data.toOpenArray(sent, sent + bufferToSend - 1)
       channel.sendQueue[0].sent.inc(bufferToSend)
       if channel.sendQueue[0].sent >= data.len:
+        # if every byte of the message is in the buffer, add the write future to the
+        # sequence of futures to be completed (or failed) when the buffer is sent
         futures.add(fut)
         channel.sendQueue.delete(0)
       inBuffer.inc(bufferToSend)
 
-    trace "build send buffer", h = $header, msg=string.fromBytes(sendBuffer[12..^1])
+    trace "try to send the buffer", h = $header
     channel.sendWindow.dec(toSend)
-    try: await channel.conn.write(sendBuffer)
-    except CatchableError as exc:
+    try:
+      await channel.conn.write(sendBuffer)
+    except CancelledError:
+      trace "cancelled sending the buffer"
+      for fut in futures.items():
+        fut.cancelSoon()
+      await channel.reset()
+      break
+    except LPStreamError as exc:
+      trace "failed to send the buffer"
       let connDown = newLPStreamConnDownError(exc)
       for fut in futures.items():
         fut.fail(connDown)
@@ -333,7 +385,11 @@ proc trySend(channel: YamuxChannel) {.async.} =
       fut.complete()
     channel.activity = true
 
-method write*(channel: YamuxChannel, msg: seq[byte]): Future[void] =
+method write*(
+    channel: YamuxChannel, msg: seq[byte]
+): Future[void] {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
+  ## Write to yamux channel
+  ##
   result = newFuture[void]("Yamux Send")
   if channel.remoteReset:
     result.fail(newLPStreamResetError())
@@ -346,65 +402,100 @@ method write*(channel: YamuxChannel, msg: seq[byte]): Future[void] =
     return result
   channel.sendQueue.add((msg, 0, result))
   when defined(libp2p_yamux_metrics):
-    libp2p_yamux_recv_queue.observe(channel.sendQueueBytes().int64)
+    libp2p_yamux_send_queue.observe(channel.lengthSendQueue().int64)
   asyncSpawn channel.trySend()
 
-proc open*(channel: YamuxChannel) {.async, gcsafe.} =
+proc open(channel: YamuxChannel) {.async: (raises: [CancelledError, LPStreamError]).} =
+  ## Open a yamux channel by sending a window update with Syn or Ack flag
+  ##
   if channel.opened:
     trace "Try to open channel twice"
     return
   channel.opened = true
-  await channel.conn.write(YamuxHeader.data(channel.id, 0, {if channel.isSrc: Syn else: Ack}))
+  await channel.conn.write(
+    YamuxHeader.windowUpdate(
+      channel.id,
+      uint32(max(channel.maxRecvWindow - YamuxDefaultWindowSize, 0)),
+      {if channel.isSrc: Syn else: Ack},
+    )
+  )
 
-type
-  Yamux* = ref object of Muxer
-    channels: Table[uint32, YamuxChannel]
-    flushed: Table[uint32, int]
-    currentId: uint32
-    isClosed: bool
-    maxChannCount: int
+method getWrapped*(channel: YamuxChannel): Connection =
+  channel.conn
+
+type Yamux* = ref object of Muxer
+  channels: Table[uint32, YamuxChannel]
+  flushed: Table[uint32, int]
+  currentId: uint32
+  isClosed: bool
+  maxChannCount: int
+  windowSize: int
+  maxSendQueueSize: int
+  inTimeout: Duration
+  outTimeout: Duration
 
 proc lenBySrc(m: Yamux, isSrc: bool): int =
   for v in m.channels.values():
-    if v.isSrc == isSrc: result += 1
+    if v.isSrc == isSrc:
+      result += 1
 
-proc cleanupChann(m: Yamux, channel: YamuxChannel) {.async.} =
-  await channel.join()
+proc cleanupChannel(m: Yamux, channel: YamuxChannel) {.async: (raises: []).} =
+  try:
+    await channel.join()
+  except CancelledError:
+    discard
   m.channels.del(channel.id)
   when defined(libp2p_yamux_metrics):
-    libp2p_yamux_channels.set(m.lenBySrc(channel.isSrc).int64, [$channel.isSrc, $channel.peerId])
+    libp2p_yamux_channels.set(
+      m.lenBySrc(channel.isSrc).int64, [$channel.isSrc, $channel.peerId]
+    )
   if channel.isReset and channel.recvWindow > 0:
     m.flushed[channel.id] = channel.recvWindow
 
-proc createStream(m: Yamux, id: uint32, isSrc: bool): YamuxChannel =
-  result = YamuxChannel(
+proc createStream(
+    m: Yamux, id: uint32, isSrc: bool, recvWindow: int, maxSendQueueSize: int
+): YamuxChannel =
+  # During initialization, recvWindow can be larger than maxRecvWindow.
+  # This is because the peer we're connected to will always assume
+  # that the initial recvWindow is 256k.
+  # To solve this contradiction, no updateWindow will be sent until
+  # recvWindow is less than maxRecvWindow
+  var stream = YamuxChannel(
     id: id,
-    maxRecvWindow: DefaultWindowSize,
-    recvWindow: DefaultWindowSize,
-    sendWindow: DefaultWindowSize,
+    maxRecvWindow: recvWindow,
+    recvWindow:
+      if recvWindow > YamuxDefaultWindowSize: recvWindow else: YamuxDefaultWindowSize,
+    sendWindow: YamuxDefaultWindowSize,
+    maxSendQueueSize: maxSendQueueSize,
     isSrc: isSrc,
     conn: m.connection,
     receivedData: newAsyncEvent(),
-    closedRemotely: newFuture[void]()
+    closedRemotely: newAsyncEvent(),
   )
-  result.objName = "YamuxStream"
-  result.dir = if isSrc: Direction.Out else: Direction.In
-  result.timeoutHandler = proc(): Future[void] {.gcsafe.} =
+  stream.objName = "YamuxStream"
+  if isSrc:
+    stream.dir = Direction.Out
+    stream.timeout = m.outTimeout
+  else:
+    stream.dir = Direction.In
+    stream.timeout = m.inTimeout
+  stream.timeoutHandler = proc(): Future[void] {.async: (raises: [], raw: true).} =
     trace "Idle timeout expired, resetting YamuxChannel"
-    result.reset()
-  result.initStream()
-  result.peerId = m.connection.peerId
-  result.observedAddr = m.connection.observedAddr
-  result.transportDir = m.connection.transportDir
+    stream.reset(isLocal = true)
+  stream.initStream()
+  stream.peerId = m.connection.peerId
+  stream.observedAddr = m.connection.observedAddr
+  stream.transportDir = m.connection.transportDir
   when defined(libp2p_agents_metrics):
-    result.shortAgent = m.connection.shortAgent
-  m.channels[id] = result
-  asyncSpawn m.cleanupChann(result)
-  trace "created channel", id, pid=m.connection.peerId
+    stream.shortAgent = m.connection.shortAgent
+  m.channels[id] = stream
+  asyncSpawn m.cleanupChannel(stream)
+  trace "created channel", id, pid = m.connection.peerId
   when defined(libp2p_yamux_metrics):
-    libp2p_yamux_channels.set(m.lenBySrc(isSrc).int64, [$isSrc, $result.peerId])
+    libp2p_yamux_channels.set(m.lenBySrc(isSrc).int64, [$isSrc, $stream.peerId])
+  return stream
 
-method close*(m: Yamux) {.async.} =
+method close*(m: Yamux) {.async: (raises: []).} =
   if m.isClosed == true:
     trace "Already closed"
     return
@@ -413,69 +504,86 @@ method close*(m: Yamux) {.async.} =
   trace "Closing yamux"
   let channels = toSeq(m.channels.values())
   for channel in channels:
-    await channel.reset(true)
-  try: await m.connection.write(YamuxHeader.goAway(NormalTermination))
-  except CatchableError as exc: trace "failed to send goAway", msg=exc.msg
+    await channel.reset(isLocal = true)
+  try:
+    await m.connection.write(YamuxHeader.goAway(NormalTermination))
+  except CancelledError as exc:
+    trace "cancelled sending goAway", msg = exc.msg
+  except LPStreamError as exc:
+    trace "failed to send goAway", msg = exc.msg
   await m.connection.close()
   trace "Closed yamux"
 
-proc handleStream(m: Yamux, channel: YamuxChannel) {.async.} =
-  ## call the muxer stream handler for this channel
+proc handleStream(m: Yamux, channel: YamuxChannel) {.async: (raises: []).} =
+  ## Call the muxer stream handler for this channel
   ##
-  try:
-    await m.streamHandler(channel)
-    trace "finished handling stream"
-    doAssert(channel.isClosed, "connection not closed by handler!")
-  except CatchableError as exc:
-    trace "Exception in yamux stream handler", msg = exc.msg
-    await channel.reset()
+  await m.streamHandler(channel)
+  trace "finished handling stream"
+  doAssert(channel.isClosed, "connection not closed by handler!")
 
-method handle*(m: Yamux) {.async, gcsafe.} =
-  trace "Starting yamux handler", pid=m.connection.peerId
+method handle*(m: Yamux) {.async: (raises: []).} =
+  trace "Starting yamux handler", pid = m.connection.peerId
   try:
     while not m.connection.atEof:
       trace "waiting for header"
       let header = await m.connection.readHeader()
       trace "got message", h = $header
 
-      case header.msgType:
+      case header.msgType
       of Ping:
         if MsgFlags.Syn in header.flags:
           await m.connection.write(YamuxHeader.ping(MsgFlags.Ack, header.length))
       of GoAway:
         var status: GoAwayStatus
-        if status.checkedEnumAssign(header.length): trace "Received go away", status
-        else: trace "Received unexpected error go away"
+        if status.checkedEnumAssign(header.length):
+          trace "Received go away", status
+        else:
+          trace "Received unexpected error go away"
         break
       of Data, WindowUpdate:
         if MsgFlags.Syn in header.flags:
           if header.streamId in m.channels:
-            debug "Trying to create an existing channel, skipping", id=header.streamId
+            debug "Trying to create an existing channel, skipping", id = header.streamId
           else:
             if header.streamId in m.flushed:
               m.flushed.del(header.streamId)
+
             if header.streamId mod 2 == m.currentId mod 2:
+              debug "Peer used our reserved stream id, skipping",
+                id = header.streamId,
+                currentId = m.currentId,
+                peerId = m.connection.peerId
               raise newException(YamuxError, "Peer used our reserved stream id")
-            let newStream = m.createStream(header.streamId, false)
+            let newStream =
+              m.createStream(header.streamId, false, m.windowSize, m.maxSendQueueSize)
             if m.channels.len >= m.maxChannCount:
               await newStream.reset()
               continue
             await newStream.open()
             asyncSpawn m.handleStream(newStream)
         elif header.streamId notin m.channels:
-          if header.streamId notin m.flushed:
+          # Flush the data
+          m.flushed.withValue(header.streamId, flushed):
+            if header.msgType == Data:
+              flushed[].dec(int(header.length))
+              if flushed[] < 0:
+                raise
+                  newException(YamuxError, "Peer exhausted the recvWindow after reset")
+              if header.length > 0:
+                var buffer = newSeqUninitialized[byte](header.length)
+                await m.connection.readExactly(addr buffer[0], int(header.length))
+          do:
             raise newException(YamuxError, "Unknown stream ID: " & $header.streamId)
-          elif header.msgType == Data:
-            # Flush the data
-            m.flushed[header.streamId].dec(int(header.length))
-            if m.flushed[header.streamId] < 0:
-              raise newException(YamuxError, "Peer exhausted the recvWindow after reset")
-            if header.length > 0:
-              var buffer = newSeqUninitialized[byte](header.length)
-              await m.connection.readExactly(addr buffer[0], int(header.length))
           continue
 
-        let channel = m.channels[header.streamId]
+        let channel =
+          try:
+            m.channels[header.streamId]
+          except KeyError:
+            raise newException(
+              YamuxError,
+              "Stream was cleaned up before handling data: " & $header.streamId,
+            )
 
         if header.msgType == WindowUpdate:
           channel.sendWindow += int(header.length)
@@ -488,7 +596,7 @@ method handle*(m: Yamux) {.async, gcsafe.} =
           if header.length > 0:
             var buffer = newSeqUninitialized[byte](header.length)
             await m.connection.readExactly(addr buffer[0], int(header.length))
-            trace "Msg Rcv", msg=string.fromBytes(buffer)
+            trace "Msg Rcv", msg = shortLog(buffer)
             await channel.gotDataFromRemote(buffer)
 
         if MsgFlags.Fin in header.flags:
@@ -497,31 +605,58 @@ method handle*(m: Yamux) {.async, gcsafe.} =
         if MsgFlags.Rst in header.flags:
           trace "remote reset channel"
           await channel.reset()
+  except CancelledError as exc:
+    debug "Unexpected cancellation in yamux handler", msg = exc.msg
   except LPStreamEOFError as exc:
     trace "Stream EOF", msg = exc.msg
+  except LPStreamError as exc:
+    debug "Unexpected stream exception in yamux read loop", msg = exc.msg
   except YamuxError as exc:
-    trace "Closing yamux connection", error=exc.msg
-    await m.connection.write(YamuxHeader.goAway(ProtocolError))
+    trace "Closing yamux connection", error = exc.msg
+    try:
+      await m.connection.write(YamuxHeader.goAway(ProtocolError))
+    except CancelledError, LPStreamError:
+      discard
+  except MuxerError as exc:
+    debug "Unexpected muxer exception in yamux read loop", msg = exc.msg
+    try:
+      await m.connection.write(YamuxHeader.goAway(ProtocolError))
+    except CancelledError, LPStreamError:
+      discard
   finally:
     await m.close()
   trace "Stopped yamux handler"
 
-method newStream*(
-  m: Yamux,
-  name: string = "",
-  lazy: bool = false): Future[Connection] {.async, gcsafe.} =
+method getStreams*(m: Yamux): seq[Connection] =
+  for c in m.channels.values:
+    result.add(c)
 
+method newStream*(
+    m: Yamux, name: string = "", lazy: bool = false
+): Future[Connection] {.async: (raises: [CancelledError, LPStreamError, MuxerError]).} =
   if m.channels.len > m.maxChannCount - 1:
     raise newException(TooManyChannels, "max allowed channel count exceeded")
-  let stream = m.createStream(m.currentId, true)
+  let stream = m.createStream(m.currentId, true, m.windowSize, m.maxSendQueueSize)
   m.currentId += 2
   if not lazy:
     await stream.open()
   return stream
 
-proc new*(T: type[Yamux], conn: Connection, maxChannCount: int = MaxChannelCount): T =
+proc new*(
+    T: type[Yamux],
+    conn: Connection,
+    maxChannCount: int = MaxChannelCount,
+    windowSize: int = YamuxDefaultWindowSize,
+    maxSendQueueSize: int = MaxSendQueueSize,
+    inTimeout: Duration = 5.minutes,
+    outTimeout: Duration = 5.minutes,
+): T =
   T(
     connection: conn,
     currentId: if conn.dir == Out: 1 else: 2,
-    maxChannCount: maxChannCount
+    maxChannCount: maxChannCount,
+    windowSize: windowSize,
+    maxSendQueueSize: maxSendQueueSize,
+    inTimeout: inTimeout,
+    outTimeout: outTimeout,
   )

libp2p/nameresolving/dnsresolver.nim

@@ -7,25 +7,23 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import
   std/[streams, strutils, sets, sequtils],
-  chronos, chronicles, stew/byteutils,
-  dnsclientpkg/[protocol, types]
+  chronos,
+  chronicles,
+  stew/byteutils,
+  dnsclientpkg/[protocol, types],
+  ../utility
 
-import
-  nameresolver
+import nameresolver
 
 logScope:
   topics = "libp2p dnsresolver"
 
-type
-  DnsResolver* = ref object of NameResolver
-    nameServers*: seq[TransportAddress]
+type DnsResolver* = ref object of NameResolver
+  nameServers*: seq[TransportAddress]
 
 proc questionToBuf(address: string, kind: QKind): seq[byte] =
   try:
@@ -47,10 +45,8 @@ proc questionToBuf(address: string, kind: QKind): seq[byte] =
     return newSeq[byte](0)
 
 proc getDnsResponse(
-  dnsServer: TransportAddress,
-  address: string,
-  kind: QKind): Future[Response] {.async.} =
-
+    dnsServer: TransportAddress, address: string, kind: QKind
+): Future[Response] {.async.} =
   var sendBuf = questionToBuf(address, kind)
 
   if sendBuf.len == 0:
@@ -58,9 +54,10 @@ proc getDnsResponse(
 
   let receivedDataFuture = newFuture[void]()
 
-  proc datagramDataReceived(transp: DatagramTransport,
-                  raddr: TransportAddress): Future[void] {.async, closure.} =
-      receivedDataFuture.complete()
+  proc datagramDataReceived(
+      transp: DatagramTransport, raddr: TransportAddress
+  ): Future[void] {.async, closure.} =
+    receivedDataFuture.complete()
 
   let sock =
     if dnsServer.family == AddressFamily.IPv6:
@@ -80,18 +77,14 @@ proc getDnsResponse(
     # parseResponse can has a raises: [Exception, ..] because of
     # https://github.com/nim-lang/Nim/commit/035134de429b5d99c5607c5fae912762bebb6008
     # it can't actually raise though
-    return parseResponse(string.fromBytes(rawResponse))
-  except CatchableError as exc: raise exc
-  except Exception as exc: raiseAssert exc.msg
+    return exceptionToAssert:
+      parseResponse(string.fromBytes(rawResponse))
   finally:
     await sock.closeWait()
 
 method resolveIp*(
-  self: DnsResolver,
-  address: string,
-  port: Port,
-  domain: Domain = Domain.AF_UNSPEC): Future[seq[TransportAddress]] {.async.} =
-
+    self: DnsResolver, address: string, port: Port, domain: Domain = Domain.AF_UNSPEC
+): Future[seq[TransportAddress]] {.async.} =
   trace "Resolving IP using DNS", address, servers = self.nameServers.mapIt($it), domain
   for _ in 0 ..< self.nameServers.len:
     let server = self.nameServers[0]
@@ -117,18 +110,14 @@ method resolveIp*(
           # toString can has a raises: [Exception, ..] because of
           # https://github.com/nim-lang/Nim/commit/035134de429b5d99c5607c5fae912762bebb6008
           # it can't actually raise though
-          resolvedAddresses.incl(
-            try: answer.toString()
-            except CatchableError as exc: raise exc
-            except Exception as exc: raiseAssert exc.msg
-          )
+          resolvedAddresses.incl(exceptionToAssert(answer.toString()))
       except CancelledError as e:
         raise e
       except ValueError as e:
-        info "Invalid DNS query", address, error=e.msg
+        info "Invalid DNS query", address, error = e.msg
         return @[]
       except CatchableError as e:
-        info "Failed to query DNS", address, error=e.msg
+        info "Failed to query DNS", address, error = e.msg
         resolveFailed = true
         break
 
@@ -143,34 +132,29 @@ method resolveIp*(
   debug "Failed to resolve address, returning empty set"
   return @[]
 
-method resolveTxt*(
-  self: DnsResolver,
-  address: string): Future[seq[string]] {.async.} =
-
+method resolveTxt*(self: DnsResolver, address: string): Future[seq[string]] {.async.} =
   trace "Resolving TXT using DNS", address, servers = self.nameServers.mapIt($it)
   for _ in 0 ..< self.nameServers.len:
     let server = self.nameServers[0]
     try:
-      let response = await getDnsResponse(server, address, TXT)
-      trace "Got TXT response", server = $server, answer=response.answers.mapIt(it.toString())
-      return response.answers.mapIt(it.toString())
-    except CancelledError as e:
-      raise e
-    except CatchableError as e:
-      info "Failed to query DNS", address, error=e.msg
-      self.nameServers.add(self.nameServers[0])
-      self.nameServers.delete(0)
-      continue
-    except Exception as e:
       # toString can has a raises: [Exception, ..] because of
       # https://github.com/nim-lang/Nim/commit/035134de429b5d99c5607c5fae912762bebb6008
       # it can't actually raise though
-      raiseAssert e.msg
+      let response = await getDnsResponse(server, address, TXT)
+      return exceptionToAssert:
+        trace "Got TXT response",
+          server = $server, answer = response.answers.mapIt(it.toString())
+        response.answers.mapIt(it.toString())
+    except CancelledError as e:
+      raise e
+    except CatchableError as e:
+      info "Failed to query DNS", address, error = e.msg
+      self.nameServers.add(self.nameServers[0])
+      self.nameServers.delete(0)
+      continue
 
   debug "Failed to resolve TXT, returning empty set"
   return @[]
 
-proc new*(
-  T: typedesc[DnsResolver],
-  nameServers: seq[TransportAddress]): T =
+proc new*(T: typedesc[DnsResolver], nameServers: seq[TransportAddress]): T =
   T(nameServers: nameServers)

libp2p/nameresolving/mockresolver.nim

@@ -7,14 +7,9 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import
-  std/[streams, strutils, tables],
-  chronos, chronicles
+import std/tables, chronos, chronicles
 
 import nameresolver
 
@@ -29,10 +24,8 @@ type MockResolver* = ref object of NameResolver
   ipResponses*: Table[(string, bool), seq[string]]
 
 method resolveIp*(
-  self: MockResolver,
-  address: string,
-  port: Port,
-  domain: Domain = Domain.AF_UNSPEC): Future[seq[TransportAddress]] {.async.} =
+    self: MockResolver, address: string, port: Port, domain: Domain = Domain.AF_UNSPEC
+): Future[seq[TransportAddress]] {.async.} =
   if domain == Domain.AF_INET or domain == Domain.AF_UNSPEC:
     for resp in self.ipResponses.getOrDefault((address, false)):
       result.add(initTAddress(resp, port))
@@ -41,9 +34,8 @@ method resolveIp*(
     for resp in self.ipResponses.getOrDefault((address, true)):
       result.add(initTAddress(resp, port))
 
-method resolveTxt*(
-  self: MockResolver,
-  address: string): Future[seq[string]] {.async.} =
+method resolveTxt*(self: MockResolver, address: string): Future[seq[string]] {.async.} =
   return self.txtResponses.getOrDefault(address)
 
-proc new*(T: typedesc[MockResolver]): T = T()
+proc new*(T: typedesc[MockResolver]): T =
+  T()

libp2p/nameresolving/nameresolver.nim

@@ -7,37 +7,28 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[sugar, sets, sequtils, strutils]
-import
-  chronos,
-  chronicles,
-  stew/[endians2, byteutils]
+import chronos, chronicles, stew/endians2
 import ".."/[multiaddress, multicodec]
 
 logScope:
   topics = "libp2p nameresolver"
 
-type
-  NameResolver* = ref object of RootObj
+type NameResolver* = ref object of RootObj
 
 method resolveTxt*(
-  self: NameResolver,
-  address: string): Future[seq[string]] {.async, base.} =
+    self: NameResolver, address: string
+): Future[seq[string]] {.async, base.} =
   ## Get TXT record
   ##
 
   doAssert(false, "Not implemented!")
 
 method resolveIp*(
-  self: NameResolver,
-  address: string,
-  port: Port,
-  domain: Domain = Domain.AF_UNSPEC): Future[seq[TransportAddress]] {.async, base.} =
+    self: NameResolver, address: string, port: Port, domain: Domain = Domain.AF_UNSPEC
+): Future[seq[TransportAddress]] {.async, base.} =
   ## Resolve the specified address
   ##
 
@@ -45,17 +36,17 @@ method resolveIp*(
 
 proc getHostname*(ma: MultiAddress): string =
   let
-    firstPart = ma[0].valueOr: return ""
+    firstPart = ma[0].valueOr:
+      return ""
     fpSplitted = ($firstPart).split('/', 2)
-  if fpSplitted.len > 2: fpSplitted[2]
-  else: ""
+  if fpSplitted.len > 2:
+    fpSplitted[2]
+  else:
+    ""
 
 proc resolveOneAddress(
-  self: NameResolver,
-  ma: MultiAddress,
-  domain: Domain = Domain.AF_UNSPEC,
-  prefix = ""): Future[seq[MultiAddress]]
-  {.async, raises: [Defect, MaError, TransportAddressError].} =
+    self: NameResolver, ma: MultiAddress, domain: Domain = Domain.AF_UNSPEC, prefix = ""
+): Future[seq[MultiAddress]] {.async.} =
   #Resolve a single address
   var pbuf: array[2, byte]
 
@@ -71,15 +62,14 @@ proc resolveOneAddress(
     for address in resolvedAddresses:
       var createdAddress = MultiAddress.init(address).tryGet()[0].tryGet()
       for part in ma:
-        if DNS.match(part.tryGet()): continue
+        if DNS.match(part.tryGet()):
+          continue
         createdAddress &= part.tryGet()
       createdAddress
 
 proc resolveDnsAddr*(
-  self: NameResolver,
-  ma: MultiAddress,
-  depth: int = 0): Future[seq[MultiAddress]] {.async.} =
-
+    self: NameResolver, ma: MultiAddress, depth: int = 0
+): Future[seq[MultiAddress]] {.async.} =
   if not DNSADDR.matchPartial(ma):
     return @[ma]
 
@@ -96,10 +86,12 @@ proc resolveDnsAddr*(
 
   var result: seq[MultiAddress]
   for entry in txt:
-    if not entry.startsWith("dnsaddr="): continue
-    let entryValue = MultiAddress.init(entry[8..^1]).tryGet()
+    if not entry.startsWith("dnsaddr="):
+      continue
+    let entryValue = MultiAddress.init(entry[8 ..^ 1]).tryGet()
 
-    if entryValue.contains(multiCodec("p2p")).tryGet() and ma.contains(multiCodec("p2p")).tryGet():
+    if entryValue.contains(multiCodec("p2p")).tryGet() and
+        ma.contains(multiCodec("p2p")).tryGet():
       if entryValue[multiCodec("p2p")] != ma[multiCodec("p2p")]:
         continue
 
@@ -112,17 +104,17 @@ proc resolveDnsAddr*(
     return @[]
   return result
 
-
 proc resolveMAddress*(
-  self: NameResolver,
-  address: MultiAddress): Future[seq[MultiAddress]] {.async.} =
+    self: NameResolver, address: MultiAddress
+): Future[seq[MultiAddress]] {.async.} =
   var res = initOrderedSet[MultiAddress]()
 
   if not DNS.matchPartial(address):
     res.incl(address)
   else:
-    let code = address[0].get().protoCode().get()
-    let seq = case code:
+    let code = address[0].tryGet().protoCode().tryGet()
+    let seq =
+      case code
       of multiCodec("dns"):
         await self.resolveOneAddress(address)
       of multiCodec("dns4"):
@@ -132,7 +124,7 @@ proc resolveMAddress*(
       of multiCodec("dnsaddr"):
         await self.resolveDnsAddr(address)
       else:
-        doAssert false
+        assert false
         @[address]
     for ad in seq:
       res.incl(ad)

libp2p/observedaddrmanager.nim

@@ -0,0 +1,92 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+{.push raises: [].}
+
+import std/[sequtils, tables, sugar]
+import chronos
+import multiaddress, multicodec
+
+type
+  ## Manages observed MultiAddresses by reomte peers. It keeps track of the most observed IP and IP/Port.
+  ObservedAddrManager* = ref object of RootObj
+    observedIPsAndPorts: seq[MultiAddress]
+    maxSize: int
+    minCount: int
+
+proc addObservation*(self: ObservedAddrManager, observedAddr: MultiAddress): bool =
+  ## Adds a new observed MultiAddress. If the number of observations exceeds maxSize, the oldest one is removed.
+  if self.observedIPsAndPorts.len >= self.maxSize:
+    self.observedIPsAndPorts.del(0)
+  self.observedIPsAndPorts.add(observedAddr)
+  return true
+
+proc getProtocol(
+    self: ObservedAddrManager, observations: seq[MultiAddress], multiCodec: MultiCodec
+): Opt[MultiAddress] =
+  var countTable = toCountTable(observations)
+  countTable.sort()
+  var orderedPairs = toSeq(countTable.pairs)
+  for (ma, count) in orderedPairs:
+    let protoCode = (ma[0].flatMap(protoCode)).valueOr:
+      continue
+    if protoCode == multiCodec and count >= self.minCount:
+      return Opt.some(ma)
+  return Opt.none(MultiAddress)
+
+proc getMostObservedProtocol(
+    self: ObservedAddrManager, multiCodec: MultiCodec
+): Opt[MultiAddress] =
+  ## Returns the most observed IP address or none if the number of observations are less than minCount.
+  let observedIPs = collect:
+    for observedIp in self.observedIPsAndPorts:
+      observedIp[0].valueOr:
+        continue
+  return self.getProtocol(observedIPs, multiCodec)
+
+proc getMostObservedProtoAndPort(
+    self: ObservedAddrManager, multiCodec: MultiCodec
+): Opt[MultiAddress] =
+  ## Returns the most observed IP/Port address or none if the number of observations are less than minCount.
+  return self.getProtocol(self.observedIPsAndPorts, multiCodec)
+
+proc getMostObservedProtosAndPorts*(self: ObservedAddrManager): seq[MultiAddress] =
+  ## Returns the most observed IP4/Port and IP6/Port address or an empty seq if the number of observations
+  ## are less than minCount.
+  var res: seq[MultiAddress]
+  self.getMostObservedProtoAndPort(multiCodec("ip4")).withValue(ip4):
+    res.add(ip4)
+  self.getMostObservedProtoAndPort(multiCodec("ip6")).withValue(ip6):
+    res.add(ip6)
+  return res
+
+proc guessDialableAddr*(self: ObservedAddrManager, ma: MultiAddress): MultiAddress =
+  ## Replaces the first proto value of each listen address by the corresponding (matching the proto code) most observed value.
+  ## If the most observed value is not available, the original MultiAddress is returned.
+  let
+    maFirst = ma[0].valueOr:
+      return ma
+    maRest = ma[1 ..^ 1].valueOr:
+      return ma
+    maFirstProto = maFirst.protoCode().valueOr:
+      return ma
+
+  let observedIP = self.getMostObservedProtocol(maFirstProto).valueOr:
+    return ma
+  return concat(observedIP, maRest).valueOr:
+    ma
+
+proc `$`*(self: ObservedAddrManager): string =
+  ## Returns a string representation of the ObservedAddrManager.
+  return "IPs and Ports: " & $self.observedIPsAndPorts
+
+proc new*(T: typedesc[ObservedAddrManager], maxSize = 10, minCount = 3): T =
+  ## Creates a new ObservedAddrManager.
+  return
+    T(observedIPsAndPorts: newSeq[MultiAddress](), maxSize: maxSize, minCount: minCount)

libp2p/peerid.nim

@@ -9,10 +9,7 @@
 
 ## This module implementes API for libp2p peer.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 {.push public.}
 
 import
@@ -21,17 +18,18 @@ import
   chronicles,
   nimcrypto/utils,
   utility,
-  ./crypto/crypto, ./multicodec, ./multihash, ./vbuffer,
+  ./crypto/crypto,
+  ./multicodec,
+  ./multihash,
+  ./vbuffer,
   ./protobuf/minprotobuf
 
 export results, utility
 
-const
-  maxInlineKeyLength* = 42
+const maxInlineKeyLength* = 42
 
-type
-  PeerId* = object
-    data*: seq[byte]
+type PeerId* = object
+  data*: seq[byte]
 
 func `$`*(pid: PeerId): string =
   ## Return base58 encoded ``pid`` representation.
@@ -44,14 +42,12 @@ func shortLog*(pid: PeerId): string =
   if len(spid) > 10:
     spid[3] = '*'
 
-    when (NimMajor, NimMinor) > (1, 4):
-      spid.delete(4 .. spid.high - 6)
-    else:
-      spid.delete(4, spid.high - 6)
+    spid.delete(4 .. spid.high - 6)
 
   spid
 
-chronicles.formatIt(PeerId): shortLog(it)
+chronicles.formatIt(PeerId):
+  shortLog(it)
 
 func toBytes*(pid: PeerId, data: var openArray[byte]): int =
   ## Store PeerId ``pid`` to array of bytes ``data``.
@@ -84,7 +80,8 @@ func cmp*(a, b: PeerId): int =
   var m = min(len(a.data), len(b.data))
   while i < m:
     result = ord(a.data[i]) - ord(b.data[i])
-    if result != 0: return
+    if result != 0:
+      return
     inc(i)
   result = len(a.data) - len(b.data)
 
@@ -171,18 +168,18 @@ func init*(t: typedesc[PeerId], data: string): Result[PeerId, cstring] =
 
 func init*(t: typedesc[PeerId], pubkey: PublicKey): Result[PeerId, cstring] =
   ## Create new peer id from public key ``pubkey``.
-  var pubraw = ? pubkey.getBytes().orError(
-    cstring("peerid: failed to get bytes from given key"))
+  var pubraw =
+    ?pubkey.getBytes().orError(cstring("peerid: failed to get bytes from given key"))
   var mh: MultiHash
   if len(pubraw) <= maxInlineKeyLength:
-    mh = ? MultiHash.digest("identity", pubraw)
+    mh = ?MultiHash.digest("identity", pubraw)
   else:
-    mh = ? MultiHash.digest("sha2-256", pubraw)
+    mh = ?MultiHash.digest("sha2-256", pubraw)
   ok(PeerId(data: mh.data.buffer))
 
 func init*(t: typedesc[PeerId], seckey: PrivateKey): Result[PeerId, cstring] =
   ## Create new peer id from private key ``seckey``.
-  PeerId.init(? seckey.getPublicKey().orError(cstring("invalid private key")))
+  PeerId.init(?seckey.getPublicKey().orError(cstring("invalid private key")))
 
 proc random*(t: typedesc[PeerId], rng = newRng()): Result[PeerId, cstring] =
   ## Create new peer id with random public key.
@@ -191,19 +188,11 @@ proc random*(t: typedesc[PeerId], rng = newRng()): Result[PeerId, cstring] =
 
 func match*(pid: PeerId, pubkey: PublicKey): bool =
   ## Returns ``true`` if ``pid`` matches public key ``pubkey``.
-  let p = PeerId.init(pubkey)
-  if p.isErr:
-    false
-  else:
-    pid == p.get()
+  PeerId.init(pubkey) == Result[PeerId, cstring].ok(pid)
 
 func match*(pid: PeerId, seckey: PrivateKey): bool =
   ## Returns ``true`` if ``pid`` matches private key ``seckey``.
-  let p = PeerId.init(seckey)
-  if p.isErr:
-    false
-  else:
-    pid == p.get()
+  PeerId.init(seckey) == Result[PeerId, cstring].ok(pid)
 
 ## Serialization/Deserialization helpers
 
@@ -215,12 +204,13 @@ func write*(pb: var ProtoBuffer, field: int, pid: PeerId) =
   ## Write PeerId value ``peerid`` to object ``pb`` using ProtoBuf's encoding.
   write(pb, field, pid.data)
 
-func getField*(pb: ProtoBuffer, field: int,
-               pid: var PeerId): ProtoResult[bool] {.inline.} =
+func getField*(
+    pb: ProtoBuffer, field: int, pid: var PeerId
+): ProtoResult[bool] {.inline.} =
   ## Read ``PeerId`` from ProtoBuf's message and validate it
   var buffer: seq[byte]
-  let res = ? pb.getField(field, buffer)
-  if not(res):
+  let res = ?pb.getField(field, buffer)
+  if not (res):
     ok(false)
   else:
     var peerId: PeerId

libp2p/peerinfo.nim

@@ -7,13 +7,10 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 {.push public.}
 
-import std/[options, sequtils]
+import std/sequtils
 import pkg/[chronos, chronicles, stew/results]
 import peerid, multiaddress, multicodec, crypto/crypto, routing_record, errors, utility
 
@@ -24,15 +21,18 @@ export peerid, multiaddress, crypto, routing_record, errors, results
 type
   PeerInfoError* = object of LPError
 
-  AddressMapper* =
-    proc(listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]]
-      {.gcsafe, raises: [Defect].}
+  AddressMapper* = proc(listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.
+    gcsafe, raises: []
+  .} ## A proc that expected to resolve the listen addresses into dialable addresses
 
   PeerInfo* {.public.} = ref object
     peerId*: PeerId
     listenAddrs*: seq[MultiAddress]
-    addrs: seq[MultiAddress]
+    ## contains addresses the node listens on, which may include wildcard and private addresses (not directly reachable).
+    addrs*: seq[MultiAddress]
+    ## contains resolved addresses that other peers can use to connect, including public-facing NAT and port-forwarded addresses.
     addressMappers*: seq[AddressMapper]
+    ## contains a list of procs that can be used to resolve the listen addresses into dialable addresses.
     protocols*: seq[string]
     protoVersion*: string
     agentVersion*: string
@@ -49,59 +49,57 @@ func shortLog*(p: PeerInfo): auto =
     protoVersion: p.protoVersion,
     agentVersion: p.agentVersion,
   )
-chronicles.formatIt(PeerInfo): shortLog(it)
+chronicles.formatIt(PeerInfo):
+  shortLog(it)
 
 proc update*(p: PeerInfo) {.async.} =
-  p.addrs = p.listenAddrs
+  # p.addrs.len == 0 overrides addrs only if it is the first time update is being executed or if the field is empty.
+  # p.addressMappers.len == 0 is for when all addressMappers have been removed,
+  # and we wish to have addrs in its initial state, i.e., a copy of listenAddrs.
+  if p.addrs.len == 0 or p.addressMappers.len == 0:
+    p.addrs = p.listenAddrs
   for mapper in p.addressMappers:
     p.addrs = await mapper(p.addrs)
 
-  let sprRes = SignedPeerRecord.init(
-    p.privateKey,
-    PeerRecord.init(p.peerId, p.addrs)
-  )
-  if sprRes.isOk:
-    p.signedPeerRecord = sprRes.get()
-  else:
-    discard
-    #info "Can't update the signed peer record"
+  p.signedPeerRecord = SignedPeerRecord.init(
+    p.privateKey, PeerRecord.init(p.peerId, p.addrs)
+  ).valueOr:
+    info "Can't update the signed peer record"
+    return
 
 proc addrs*(p: PeerInfo): seq[MultiAddress] =
   p.addrs
 
 proc fullAddrs*(p: PeerInfo): MaResult[seq[MultiAddress]] =
-  let peerIdPart = ? MultiAddress.init(multiCodec("p2p"), p.peerId.data)
+  let peerIdPart = ?MultiAddress.init(multiCodec("p2p"), p.peerId.data)
   var res: seq[MultiAddress]
   for address in p.addrs:
-    res.add(? concat(address, peerIdPart))
+    res.add(?concat(address, peerIdPart))
   ok(res)
 
 proc parseFullAddress*(ma: MultiAddress): MaResult[(PeerId, MultiAddress)] =
-  let p2pPart = ? ma[^1]
-  if ? p2pPart.protoCode != multiCodec("p2p"):
+  let p2pPart = ?ma[^1]
+  if ?p2pPart.protoCode != multiCodec("p2p"):
     return err("Missing p2p part from multiaddress!")
 
-  let res = (
-    ? PeerId.init(? p2pPart.protoArgument()).orErr("invalid peerid"),
-    ? ma[0 .. ^2]
-  )
+  let res =
+    (?PeerId.init(?p2pPart.protoArgument()).orErr("invalid peerid"), ?ma[0 .. ^2])
   ok(res)
 
 proc parseFullAddress*(ma: string | seq[byte]): MaResult[(PeerId, MultiAddress)] =
-  parseFullAddress(? MultiAddress.init(ma))
+  parseFullAddress(?MultiAddress.init(ma))
 
 proc new*(
-  p: typedesc[PeerInfo],
-  key: PrivateKey,
-  listenAddrs: openArray[MultiAddress] = [],
-  protocols: openArray[string] = [],
-  protoVersion: string = "",
-  agentVersion: string = "",
-  addressMappers = newSeq[AddressMapper](),
-  ): PeerInfo
-  {.raises: [Defect, LPError].} =
-
-  let pubkey = try:
+    p: typedesc[PeerInfo],
+    key: PrivateKey,
+    listenAddrs: openArray[MultiAddress] = [],
+    protocols: openArray[string] = [],
+    protoVersion: string = "",
+    agentVersion: string = "",
+    addressMappers = newSeq[AddressMapper](),
+): PeerInfo {.raises: [LPError].} =
+  let pubkey =
+    try:
       key.getPublicKey().tryGet()
     except CatchableError:
       raise newException(PeerInfoError, "invalid private key")
@@ -116,7 +114,7 @@ proc new*(
     agentVersion: agentVersion,
     listenAddrs: @listenAddrs,
     protocols: @protocols,
-    addressMappers: addressMappers
+    addressMappers: addressMappers,
   )
 
   return peerInfo

libp2p/peerstore.nim

@@ -16,31 +16,33 @@ runnableExamples:
   # Create a custom book type
   type MoodBook = ref object of PeerBook[string]
 
-  var somePeerId = PeerId.random().get()
+  var somePeerId = PeerId.random().expect("get random key")
 
   peerStore[MoodBook][somePeerId] = "Happy"
   doAssert peerStore[MoodBook][somePeerId] == "Happy"
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import
   std/[tables, sets, options, macros],
+  chronos,
   ./crypto/crypto,
   ./protocols/identify,
-  ./peerid, ./peerinfo,
+  ./protocols/protocol,
+  ./peerid,
+  ./peerinfo,
   ./routing_record,
   ./multiaddress,
+  ./stream/connection,
+  ./multistream,
+  ./muxers/muxer,
   utility
 
 type
   #################
   # Handler types #
   #################
-
-  PeerBookChangeHandler* = proc(peerId: PeerId) {.gcsafe, raises: [Defect].}
+  PeerBookChangeHandler* = proc(peerId: PeerId) {.gcsafe, raises: [].}
 
   #########
   # Books #
@@ -67,27 +69,26 @@ type
   ####################
   # Peer store types #
   ####################
-
   PeerStore* {.public.} = ref object
     books: Table[string, BasePeerBook]
+    identify: Identify
     capacity*: int
     toClean*: seq[PeerId]
 
-proc new*(T: type PeerStore, capacity = 1000): PeerStore {.public.} =
-  T(capacity: capacity)
+proc new*(
+    T: type PeerStore, identify: Identify, capacity = 1000
+): PeerStore {.public.} =
+  T(identify: identify, capacity: capacity)
 
 #########################
 # Generic Peer Book API #
 #########################
 
-proc `[]`*[T](peerBook: PeerBook[T],
-             peerId: PeerId): T {.public.} =
+proc `[]`*[T](peerBook: PeerBook[T], peerId: PeerId): T {.public.} =
   ## Get all known metadata of a provided peer, or default(T) if missing
   peerBook.book.getOrDefault(peerId)
 
-proc `[]=`*[T](peerBook: PeerBook[T],
-             peerId: PeerId,
-             entry: T) {.public.} =
+proc `[]=`*[T](peerBook: PeerBook[T], peerId: PeerId, entry: T) {.public.} =
   ## Set metadata for a given peerId.
 
   peerBook.book[peerId] = entry
@@ -96,8 +97,7 @@ proc `[]=`*[T](peerBook: PeerBook[T],
   for handler in peerBook.changeHandlers:
     handler(peerId)
 
-proc del*[T](peerBook: PeerBook[T],
-                peerId: PeerId): bool {.public.} =
+proc del*[T](peerBook: PeerBook[T], peerId: PeerId): bool {.public.} =
   ## Delete the provided peer from the book. Returns whether the peer was in the book
 
   if peerId notin peerBook.book:
@@ -116,7 +116,8 @@ proc addHandler*[T](peerBook: PeerBook[T], handler: PeerBookChangeHandler) {.pub
   ## Adds a callback that will be called everytime the book changes
   peerBook.changeHandlers.add(handler)
 
-proc len*[T](peerBook: PeerBook[T]): int {.public.} = peerBook.book.len
+proc len*[T](peerBook: PeerBook[T]): int {.public.} =
+  peerBook.book.len
 
 ##################
 # Peer Store API #
@@ -139,42 +140,35 @@ proc `[]`*[T](p: PeerStore, typ: type[T]): T {.public.} =
     p.books[name] = result
   return result
 
-proc del*(peerStore: PeerStore,
-             peerId: PeerId) {.public.} =
+proc del*(peerStore: PeerStore, peerId: PeerId) {.public.} =
   ## Delete the provided peer from every book.
   for _, book in peerStore.books:
     book.deletor(peerId)
 
-proc updatePeerInfo*(
-  peerStore: PeerStore,
-  info: IdentifyInfo) =
-
+proc updatePeerInfo*(peerStore: PeerStore, info: IdentifyInfo) =
   if info.addrs.len > 0:
     peerStore[AddressBook][info.peerId] = info.addrs
 
-  if info.pubkey.isSome:
-    peerStore[KeyBook][info.peerId] = info.pubkey.get()
+  info.pubkey.withValue(pubkey):
+    peerStore[KeyBook][info.peerId] = pubkey
 
-  if info.agentVersion.isSome:
-    peerStore[AgentBook][info.peerId] = info.agentVersion.get().string
+  info.agentVersion.withValue(agentVersion):
+    peerStore[AgentBook][info.peerId] = agentVersion.string
 
-  if info.protoVersion.isSome:
-    peerStore[ProtoVersionBook][info.peerId] = info.protoVersion.get().string
+  info.protoVersion.withValue(protoVersion):
+    peerStore[ProtoVersionBook][info.peerId] = protoVersion.string
 
   if info.protos.len > 0:
     peerStore[ProtoBook][info.peerId] = info.protos
 
-  if info.signedPeerRecord.isSome:
-    peerStore[SPRBook][info.peerId] = info.signedPeerRecord.get()
+  info.signedPeerRecord.withValue(signedPeerRecord):
+    peerStore[SPRBook][info.peerId] = signedPeerRecord
 
   let cleanupPos = peerStore.toClean.find(info.peerId)
   if cleanupPos >= 0:
     peerStore.toClean.delete(cleanupPos)
 
-proc cleanup*(
-  peerStore: PeerStore,
-  peerId: PeerId) =
-
+proc cleanup*(peerStore: PeerStore, peerId: PeerId) =
   if peerStore.capacity == 0:
     peerStore.del(peerId)
     return
@@ -186,3 +180,32 @@ proc cleanup*(
   while peerStore.toClean.len > peerStore.capacity:
     peerStore.del(peerStore.toClean[0])
     peerStore.toClean.delete(0)
+
+proc identify*(peerStore: PeerStore, muxer: Muxer) {.async.} =
+  # new stream for identify
+  var stream = await muxer.newStream()
+  if stream == nil:
+    return
+
+  try:
+    if (await MultistreamSelect.select(stream, peerStore.identify.codec())):
+      let info = await peerStore.identify.identify(stream, stream.peerId)
+
+      when defined(libp2p_agents_metrics):
+        var
+          knownAgent = "unknown"
+          shortAgent =
+            info.agentVersion.get("").split("/")[0].safeToLowerAscii().get("")
+        if KnownLibP2PAgentsSeq.contains(shortAgent):
+          knownAgent = shortAgent
+        muxer.connection.setShortAgent(knownAgent)
+
+      peerStore.updatePeerInfo(info)
+  finally:
+    await stream.closeWithEOF()
+
+proc getMostObservedProtosAndPorts*(self: PeerStore): seq[MultiAddress] =
+  return self.identify.observedAddrManager.getMostObservedProtosAndPorts()
+
+proc guessDialableAddr*(self: PeerStore, ma: MultiAddress): MultiAddress =
+  return self.identify.observedAddrManager.guessDialableAddr(ma)

libp2p/protobuf/minprotobuf.nim

@@ -9,10 +9,7 @@
 
 ## This module implements minimal Google's ProtoBuf primitives.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import ../varint, ../utility, stew/[endians2, results]
 export results, utility
@@ -24,14 +21,20 @@ const MaxMessageSize = 1'u shl 22
 type
   ProtoFieldKind* = enum
     ## Protobuf's field types enum
-    Varint, Fixed64, Length, StartGroup, EndGroup, Fixed32
+    Varint
+    Fixed64
+    Length
+    StartGroup
+    EndGroup
+    Fixed32
 
   ProtoFlags* = enum
     ## Protobuf's encoding types
-    WithVarintLength, WithUint32BeLength, WithUint32LeLength
+    WithVarintLength
+    WithUint32BeLength
+    WithUint32LeLength
 
-  ProtoBuffer* = object
-    ## Protobuf's message representation object
+  ProtoBuffer* = object ## Protobuf's message representation object
     options: set[ProtoFlags]
     buffer*: seq[byte]
     offset*: int
@@ -42,8 +45,7 @@ type
     wire*: ProtoFieldKind
     index*: uint64
 
-  ProtoField* = object
-    ## Protobuf's message field representation object
+  ProtoField* = object ## Protobuf's message field representation object
     index*: int
     case kind*: ProtoFieldKind
     of Varint:
@@ -58,30 +60,33 @@ type
       discard
 
   ProtoError* {.pure.} = enum
-    VarintDecode,
-    MessageIncomplete,
-    BufferOverflow,
-    MessageTooBig,
-    BadWireType,
-    IncorrectBlob,
+    VarintDecode
+    MessageIncomplete
+    BufferOverflow
+    MessageTooBig
+    BadWireType
+    IncorrectBlob
     RequiredFieldMissing
 
   ProtoResult*[T] = Result[T, ProtoError]
 
-  ProtoScalar* = uint | uint32 | uint64 | zint | zint32 | zint64 |
-                 hint | hint32 | hint64 | float32 | float64
+  ProtoScalar* =
+    uint | uint32 | uint64 | zint | zint32 | zint64 | hint | hint32 | hint64 | float32 |
+    float64
 
-const
-  SupportedWireTypes* = {
-    int(ProtoFieldKind.Varint),
-    int(ProtoFieldKind.Fixed64),
-    int(ProtoFieldKind.Length),
-    int(ProtoFieldKind.Fixed32)
-  }
+const SupportedWireTypes* =
+  @[
+    uint64(ProtoFieldKind.Varint),
+    uint64(ProtoFieldKind.Fixed64),
+    uint64(ProtoFieldKind.Length),
+    uint64(ProtoFieldKind.Fixed32),
+  ]
 
 template checkFieldNumber*(i: int) =
-  doAssert((i > 0 and i < (1 shl 29)) and not(i >= 19000 and i <= 19999),
-           "Incorrect or reserved field number")
+  doAssert(
+    (i > 0 and i < (1 shl 29)) and not (i >= 19000 and i <= 19999),
+    "Incorrect or reserved field number",
+  )
 
 template getProtoHeader*(index: int, wire: ProtoFieldKind): uint64 =
   ## Get protobuf's field header integer for ``index`` and ``wire``.
@@ -117,29 +122,34 @@ proc vsizeof*(field: ProtoField): int {.inline.} =
     vsizeof(getProtoHeader(field)) + sizeof(field.vfloat32)
   of ProtoFieldKind.Length:
     vsizeof(getProtoHeader(field)) + vsizeof(uint64(len(field.vbuffer))) +
-    len(field.vbuffer)
+      len(field.vbuffer)
   else:
     0
 
-proc initProtoBuffer*(data: seq[byte], offset = 0,
-                      options: set[ProtoFlags] = {},
-                      maxSize = MaxMessageSize): ProtoBuffer =
+proc initProtoBuffer*(
+    data: seq[byte], offset = 0, options: set[ProtoFlags] = {}, maxSize = MaxMessageSize
+): ProtoBuffer =
   ## Initialize ProtoBuffer with shallow copy of ``data``.
   result.buffer = data
   result.offset = offset
   result.options = options
   result.maxSize = maxSize
 
-proc initProtoBuffer*(data: openArray[byte], offset = 0,
-                      options: set[ProtoFlags] = {},
-                      maxSize = MaxMessageSize): ProtoBuffer =
+proc initProtoBuffer*(
+    data: openArray[byte],
+    offset = 0,
+    options: set[ProtoFlags] = {},
+    maxSize = MaxMessageSize,
+): ProtoBuffer =
   ## Initialize ProtoBuffer with copy of ``data``.
   result.buffer = @data
   result.offset = offset
   result.options = options
   result.maxSize = maxSize
 
-proc initProtoBuffer*(options: set[ProtoFlags] = {}, maxSize = MaxMessageSize): ProtoBuffer =
+proc initProtoBuffer*(
+    options: set[ProtoFlags] = {}, maxSize = MaxMessageSize
+): ProtoBuffer =
   ## Initialize ProtoBuffer with new sequence of capacity ``cap``.
   result.buffer = newSeq[byte]()
   result.options = options
@@ -155,37 +165,31 @@ proc initProtoBuffer*(options: set[ProtoFlags] = {}, maxSize = MaxMessageSize):
     result.buffer.setLen(4)
     result.offset = 4
 
-proc write*[T: ProtoScalar](pb: var ProtoBuffer,
-                            field: int, value: T) =
+proc write*[T: ProtoScalar](pb: var ProtoBuffer, field: int, value: T) =
   checkFieldNumber(field)
   var length = 0
-  when (T is uint64) or (T is uint32) or (T is uint) or
-       (T is zint64) or (T is zint32) or (T is zint) or
-       (T is hint64) or (T is hint32) or (T is hint):
-    let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Varint)) +
-                  vsizeof(value)
+  when (T is uint64) or (T is uint32) or (T is uint) or (T is zint64) or (T is zint32) or
+      (T is zint) or (T is hint64) or (T is hint32) or (T is hint):
+    let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Varint)) + vsizeof(value)
     let header = ProtoFieldKind.Varint
   elif T is float32:
-    let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Fixed32)) +
-                  sizeof(T)
+    let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Fixed32)) + sizeof(T)
     let header = ProtoFieldKind.Fixed32
   elif T is float64:
-    let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Fixed64)) +
-                  sizeof(T)
+    let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Fixed64)) + sizeof(T)
     let header = ProtoFieldKind.Fixed64
 
   pb.buffer.setLen(len(pb.buffer) + flength)
 
-  let hres = PB.putUVarint(pb.toOpenArray(), length,
-                           getProtoHeader(field, header))
+  let hres = PB.putUVarint(pb.toOpenArray(), length, getProtoHeader(field, header))
   doAssert(hres.isOk())
   pb.offset += length
   when (T is uint64) or (T is uint32) or (T is uint):
     let vres = PB.putUVarint(pb.toOpenArray(), length, value)
     doAssert(vres.isOk())
     pb.offset += length
-  elif (T is zint64) or (T is zint32) or (T is zint) or
-       (T is hint64) or (T is hint32) or (T is hint):
+  elif (T is zint64) or (T is zint32) or (T is zint) or (T is hint64) or (T is hint32) or
+      (T is hint):
     let vres = putSVarint(pb.toOpenArray(), length, value)
     doAssert(vres.isOk())
     pb.offset += length
@@ -200,14 +204,14 @@ proc write*[T: ProtoScalar](pb: var ProtoBuffer,
     pb.buffer[pb.offset ..< pb.offset + sizeof(T)] = u64.toBytesLE()
     pb.offset += sizeof(T)
 
-proc writePacked*[T: ProtoScalar](pb: var ProtoBuffer, field: int,
-                                  value: openArray[T]) =
+proc writePacked*[T: ProtoScalar](
+    pb: var ProtoBuffer, field: int, value: openArray[T]
+) =
   checkFieldNumber(field)
   var length = 0
   let dlength =
-    when (T is uint64) or (T is uint32) or (T is uint) or
-         (T is zint64) or (T is zint32) or (T is zint) or
-         (T is hint64) or (T is hint32) or (T is hint):
+    when (T is uint64) or (T is uint32) or (T is uint) or (T is zint64) or (T is zint32) or
+        (T is zint) or (T is hint64) or (T is hint32) or (T is hint):
       var res = 0
       for item in value:
         res += vsizeof(item)
@@ -231,8 +235,8 @@ proc writePacked*[T: ProtoScalar](pb: var ProtoBuffer, field: int,
       let vres = PB.putUVarint(pb.toOpenArray(), length, item)
       doAssert(vres.isOk())
       pb.offset += length
-    elif (T is zint64) or (T is zint32) or (T is zint) or
-         (T is hint64) or (T is hint32) or (T is hint):
+    elif (T is zint64) or (T is zint32) or (T is zint) or (T is hint64) or (T is hint32) or
+        (T is hint):
       length = 0
       let vres = PB.putSVarint(pb.toOpenArray(), length, item)
       doAssert(vres.isOk())
@@ -248,19 +252,19 @@ proc writePacked*[T: ProtoScalar](pb: var ProtoBuffer, field: int,
       pb.buffer[pb.offset ..< pb.offset + sizeof(T)] = u64.toBytesLE()
       pb.offset += sizeof(T)
 
-proc write*[T: byte|char](pb: var ProtoBuffer, field: int,
-                          value: openArray[T]) =
+proc write*[T: byte | char](pb: var ProtoBuffer, field: int, value: openArray[T]) =
   checkFieldNumber(field)
   var length = 0
-  let flength = vsizeof(getProtoHeader(field, ProtoFieldKind.Length)) +
-                vsizeof(uint64(len(value))) + len(value)
+  let flength =
+    vsizeof(getProtoHeader(field, ProtoFieldKind.Length)) + vsizeof(uint64(len(value))) +
+    len(value)
   pb.buffer.setLen(len(pb.buffer) + flength)
-  let hres = PB.putUVarint(pb.toOpenArray(), length,
-                           getProtoHeader(field, ProtoFieldKind.Length))
+  let hres = PB.putUVarint(
+    pb.toOpenArray(), length, getProtoHeader(field, ProtoFieldKind.Length)
+  )
   doAssert(hres.isOk())
   pb.offset += length
-  let lres = PB.putUVarint(pb.toOpenArray(), length,
-                           uint64(len(value)))
+  let lres = PB.putUVarint(pb.toOpenArray(), length, uint64(len(value)))
   doAssert(lres.isOk())
   pb.offset += length
   if len(value) > 0:
@@ -297,8 +301,7 @@ proc finish*(pb: var ProtoBuffer) =
     doAssert(len(pb.buffer) > 0)
     pb.offset = 0
 
-proc getHeader(data: var ProtoBuffer,
-               header: var ProtoHeader): ProtoResult[void] =
+proc getHeader(data: var ProtoBuffer, header: var ProtoHeader): ProtoResult[void] =
   var length = 0
   var hdr = 0'u64
   if PB.getUVarint(data.toOpenArray(), length, hdr).isOk():
@@ -353,9 +356,9 @@ proc skipValue(data: var ProtoBuffer, header: ProtoHeader): ProtoResult[void] =
   of ProtoFieldKind.StartGroup, ProtoFieldKind.EndGroup:
     err(ProtoError.BadWireType)
 
-proc getValue[T: ProtoScalar](data: var ProtoBuffer,
-                              header: ProtoHeader,
-                              outval: var T): ProtoResult[void] =
+proc getValue[T: ProtoScalar](
+    data: var ProtoBuffer, header: ProtoHeader, outval: var T
+): ProtoResult[void] =
   when (T is uint64) or (T is uint32) or (T is uint):
     doAssert(header.wire == ProtoFieldKind.Varint)
     var length = 0
@@ -366,8 +369,8 @@ proc getValue[T: ProtoScalar](data: var ProtoBuffer,
       ok()
     else:
       err(ProtoError.VarintDecode)
-  elif (T is zint64) or (T is zint32) or (T is zint) or
-       (T is hint64) or (T is hint32) or (T is hint):
+  elif (T is zint64) or (T is zint32) or (T is zint) or (T is hint64) or (T is hint32) or
+      (T is hint):
     doAssert(header.wire == ProtoFieldKind.Varint)
     var length = 0
     var value = T(0)
@@ -394,9 +397,12 @@ proc getValue[T: ProtoScalar](data: var ProtoBuffer,
     else:
       err(ProtoError.MessageIncomplete)
 
-proc getValue[T:byte|char](data: var ProtoBuffer, header: ProtoHeader,
-                           outBytes: var openArray[T],
-                           outLength: var int): ProtoResult[void] =
+proc getValue[T: byte | char](
+    data: var ProtoBuffer,
+    header: ProtoHeader,
+    outBytes: var openArray[T],
+    outLength: var int,
+): ProtoResult[void] =
   doAssert(header.wire == ProtoFieldKind.Length)
   var length = 0
   var bsize = 0'u64
@@ -423,8 +429,9 @@ proc getValue[T:byte|char](data: var ProtoBuffer, header: ProtoHeader,
   else:
     err(ProtoError.VarintDecode)
 
-proc getValue[T:seq[byte]|string](data: var ProtoBuffer, header: ProtoHeader,
-                                  outBytes: var T): ProtoResult[void] =
+proc getValue[T: seq[byte] | string](
+    data: var ProtoBuffer, header: ProtoHeader, outBytes: var T
+): ProtoResult[void] =
   doAssert(header.wire == ProtoFieldKind.Length)
   var length = 0
   var bsize = 0'u64
@@ -446,20 +453,20 @@ proc getValue[T:seq[byte]|string](data: var ProtoBuffer, header: ProtoHeader,
   else:
     err(ProtoError.VarintDecode)
 
-proc getField*[T: ProtoScalar](data: ProtoBuffer, field: int,
-                               output: var T): ProtoResult[bool] =
+proc getField*[T: ProtoScalar](
+    data: ProtoBuffer, field: int, output: var T
+): ProtoResult[bool] =
   checkFieldNumber(field)
   var current: T
   var res = false
   var pb = data
 
-  while not(pb.isEmpty()):
+  while not (pb.isEmpty()):
     var header: ProtoHeader
-    ? pb.getHeader(header)
+    ?pb.getHeader(header)
     let wireCheck =
-      when (T is uint64) or (T is uint32) or (T is uint) or
-           (T is zint64) or (T is zint32) or (T is zint) or
-           (T is hint64) or (T is hint32) or (T is hint):
+      when (T is uint64) or (T is uint32) or (T is uint) or (T is zint64) or
+          (T is zint32) or (T is zint) or (T is hint64) or (T is hint32) or (T is hint):
         header.wire == ProtoFieldKind.Varint
       elif T is float32:
         header.wire == ProtoFieldKind.Fixed32
@@ -477,9 +484,9 @@ proc getField*[T: ProtoScalar](data: ProtoBuffer, field: int,
       else:
         # We are ignoring wire types different from what we expect, because it
         # is how `protoc` is working.
-        ? pb.skipValue(header)
+        ?pb.skipValue(header)
     else:
-      ? pb.skipValue(header)
+      ?pb.skipValue(header)
 
   if res:
     output = current
@@ -487,16 +494,16 @@ proc getField*[T: ProtoScalar](data: ProtoBuffer, field: int,
   else:
     ok(false)
 
-proc getField*[T: byte|char](data: ProtoBuffer, field: int,
-                             output: var openArray[T],
-                             outlen: var int): ProtoResult[bool] =
+proc getField*[T: byte | char](
+    data: ProtoBuffer, field: int, output: var openArray[T], outlen: var int
+): ProtoResult[bool] =
   checkFieldNumber(field)
   var pb = data
   var res = false
 
   outlen = 0
 
-  while not(pb.isEmpty()):
+  while not (pb.isEmpty()):
     var header: ProtoHeader
     let hres = pb.getHeader(header)
     if hres.isErr():
@@ -539,13 +546,14 @@ proc getField*[T: byte|char](data: ProtoBuffer, field: int,
   else:
     ok(false)
 
-proc getField*[T: seq[byte]|string](data: ProtoBuffer, field: int,
-                                    output: var T): ProtoResult[bool] =
+proc getField*[T: seq[byte] | string](
+    data: ProtoBuffer, field: int, output: var T
+): ProtoResult[bool] =
   checkFieldNumber(field)
   var res = false
   var pb = data
 
-  while not(pb.isEmpty()):
+  while not (pb.isEmpty()):
     var header: ProtoHeader
     let hres = pb.getHeader(header)
     if hres.isErr():
@@ -576,37 +584,32 @@ proc getField*[T: seq[byte]|string](data: ProtoBuffer, field: int,
   else:
     ok(false)
 
-proc getField*(pb: ProtoBuffer, field: int,
-               output: var ProtoBuffer): ProtoResult[bool] {.inline.} =
+proc getField*(
+    pb: ProtoBuffer, field: int, output: var ProtoBuffer
+): ProtoResult[bool] {.inline.} =
   var buffer: seq[byte]
-  let res = pb.getField(field, buffer)
-  if res.isOk():
-    if res.get():
-      output = initProtoBuffer(buffer)
-      ok(true)
-    else:
-      ok(false)
+  if ?pb.getField(field, buffer):
+    output = initProtoBuffer(buffer)
+    ok(true)
   else:
-    err(res.error)
+    ok(false)
 
-proc getRequiredField*[T](pb: ProtoBuffer, field: int,
-               output: var T): ProtoResult[void] {.inline.} =
-  let res = pb.getField(field, output)
-  if res.isOk():
-    if res.get():
-      ok()
-    else:
-      err(RequiredFieldMissing)
+proc getRequiredField*[T](
+    pb: ProtoBuffer, field: int, output: var T
+): ProtoResult[void] {.inline.} =
+  if ?pb.getField(field, output):
+    ok()
   else:
-    err(res.error)
+    err(RequiredFieldMissing)
 
-proc getRepeatedField*[T: seq[byte]|string](data: ProtoBuffer, field: int,
-                                        output: var seq[T]): ProtoResult[bool] =
+proc getRepeatedField*[T: seq[byte] | string](
+    data: ProtoBuffer, field: int, output: var seq[T]
+): ProtoResult[bool] =
   checkFieldNumber(field)
   var pb = data
   output.setLen(0)
 
-  while not(pb.isEmpty()):
+  while not (pb.isEmpty()):
     var header: ProtoHeader
     let hres = pb.getHeader(header)
     if hres.isErr():
@@ -637,13 +640,14 @@ proc getRepeatedField*[T: seq[byte]|string](data: ProtoBuffer, field: int,
   else:
     ok(false)
 
-proc getRepeatedField*[T: ProtoScalar](data: ProtoBuffer, field: int,
-                                       output: var seq[T]): ProtoResult[bool] =
+proc getRepeatedField*[T: ProtoScalar](
+    data: ProtoBuffer, field: int, output: var seq[T]
+): ProtoResult[bool] =
   checkFieldNumber(field)
   var pb = data
   output.setLen(0)
 
-  while not(pb.isEmpty()):
+  while not (pb.isEmpty()):
     var header: ProtoHeader
     let hres = pb.getHeader(header)
     if hres.isErr():
@@ -651,8 +655,8 @@ proc getRepeatedField*[T: ProtoScalar](data: ProtoBuffer, field: int,
       return err(hres.error)
 
     if header.index == uint64(field):
-      if header.wire in {ProtoFieldKind.Varint, ProtoFieldKind.Fixed32,
-                         ProtoFieldKind.Fixed64}:
+      if header.wire in
+          {ProtoFieldKind.Varint, ProtoFieldKind.Fixed32, ProtoFieldKind.Fixed64}:
         var item: T
         let vres = getValue(pb, header, item)
         if vres.isOk():
@@ -676,24 +680,22 @@ proc getRepeatedField*[T: ProtoScalar](data: ProtoBuffer, field: int,
   else:
     ok(false)
 
-proc getRequiredRepeatedField*[T](pb: ProtoBuffer, field: int,
-               output: var seq[T]): ProtoResult[void] {.inline.} =
-  let res = pb.getRepeatedField(field, output)
-  if res.isOk():
-    if res.get():
-      ok()
-    else:
-      err(RequiredFieldMissing)
+proc getRequiredRepeatedField*[T](
+    pb: ProtoBuffer, field: int, output: var seq[T]
+): ProtoResult[void] {.inline.} =
+  if ?pb.getRepeatedField(field, output):
+    ok()
   else:
-    err(res.error)
+    err(RequiredFieldMissing)
 
-proc getPackedRepeatedField*[T: ProtoScalar](data: ProtoBuffer, field: int,
-                                        output: var seq[T]): ProtoResult[bool] =
+proc getPackedRepeatedField*[T: ProtoScalar](
+    data: ProtoBuffer, field: int, output: var seq[T]
+): ProtoResult[bool] =
   checkFieldNumber(field)
   var pb = data
   output.setLen(0)
 
-  while not(pb.isEmpty()):
+  while not (pb.isEmpty()):
     var header: ProtoHeader
     let hres = pb.getHeader(header)
     if hres.isErr():
@@ -707,15 +709,15 @@ proc getPackedRepeatedField*[T: ProtoScalar](data: ProtoBuffer, field: int,
         if ares.isOk():
           var pbarr = initProtoBuffer(arritem)
           let itemHeader =
-            when (T is uint64) or (T is uint32) or (T is uint) or
-                 (T is zint64) or (T is zint32) or (T is zint) or
-                 (T is hint64) or (T is hint32) or (T is hint):
+            when (T is uint64) or (T is uint32) or (T is uint) or (T is zint64) or
+                (T is zint32) or (T is zint) or (T is hint64) or (T is hint32) or
+                (T is hint):
               ProtoHeader(wire: ProtoFieldKind.Varint)
             elif T is float32:
               ProtoHeader(wire: ProtoFieldKind.Fixed32)
             elif T is float64:
               ProtoHeader(wire: ProtoFieldKind.Fixed64)
-          while not(pbarr.isEmpty()):
+          while not (pbarr.isEmpty()):
             var item: T
             let vres = getValue(pbarr, itemHeader, item)
             if vres.isOk():

libp2p/protocols/connectivity/autonat/client.nim

@@ -7,46 +7,39 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[options, sets, sequtils]
-import stew/[results, objects]
+import stew/results
 import chronos, chronicles
-import ../../../switch,
-       ../../../multiaddress,
-       ../../../peerid
+import ../../../switch, ../../../multiaddress, ../../../peerid
 import core
 
-export core
-
 logScope:
   topics = "libp2p autonat"
 
-type
-  AutonatClient* = ref object of RootObj
+type AutonatClient* = ref object of RootObj
 
 proc sendDial(conn: Connection, pid: PeerId, addrs: seq[MultiAddress]) {.async.} =
-  let pb = AutonatDial(peerInfo: some(AutonatPeerInfo(
-                         id: some(pid),
-                         addrs: addrs
-                       ))).encode()
+  let pb = AutonatDial(
+    peerInfo: Opt.some(AutonatPeerInfo(id: Opt.some(pid), addrs: addrs))
+  ).encode()
   await conn.writeLp(pb.buffer)
 
-method dialMe*(self: AutonatClient, switch: Switch, pid: PeerId, addrs: seq[MultiAddress] = newSeq[MultiAddress]()):
-    Future[MultiAddress] {.base, async.} =
-
-  proc getResponseOrRaise(autonatMsg: Option[AutonatMsg]): AutonatDialResponse {.raises: [UnpackError, AutonatError].} =
-    if autonatMsg.isNone() or
-       autonatMsg.get().msgType != DialResponse or
-       autonatMsg.get().response.isNone() or
-       (autonatMsg.get().response.get().status == Ok and
-        autonatMsg.get().response.get().ma.isNone()):
-      raise newException(AutonatError, "Unexpected response")
-    else:
-      autonatMsg.get().response.get()
+method dialMe*(
+    self: AutonatClient,
+    switch: Switch,
+    pid: PeerId,
+    addrs: seq[MultiAddress] = newSeq[MultiAddress](),
+): Future[MultiAddress] {.base, async.} =
+  proc getResponseOrRaise(
+      autonatMsg: Opt[AutonatMsg]
+  ): AutonatDialResponse {.raises: [AutonatError].} =
+    autonatMsg.withValue(msg):
+      if msg.msgType == DialResponse:
+        msg.response.withValue(res):
+          if not (res.status == Ok and res.ma.isNone()):
+            return res
+    raise newException(AutonatError, "Unexpected response")
 
   let conn =
     try:
@@ -55,20 +48,32 @@ method dialMe*(self: AutonatClient, switch: Switch, pid: PeerId, addrs: seq[Mult
       else:
         await switch.dial(pid, addrs, AutonatCodec)
     except CatchableError as err:
-      raise newException(AutonatError, "Unexpected error when dialling: " & err.msg, err)
+      raise
+        newException(AutonatError, "Unexpected error when dialling: " & err.msg, err)
 
   # To bypass maxConnectionsPerPeer
-  let incomingConnection = switch.connManager.expectConnection(pid)
+  let incomingConnection = switch.connManager.expectConnection(pid, In)
+  if incomingConnection.failed() and
+      incomingConnection.error of AlreadyExpectingConnectionError:
+    raise newException(AutonatError, incomingConnection.error.msg)
   defer:
     await conn.close()
-    incomingConnection.cancel() # Safer to always try to cancel cause we aren't sure if the peer dialled us or not
+    incomingConnection.cancel()
+      # Safer to always try to cancel cause we aren't sure if the peer dialled us or not
+    if incomingConnection.completed():
+      await (await incomingConnection).connection.close()
   trace "sending Dial", addrs = switch.peerInfo.addrs
   await conn.sendDial(switch.peerInfo.peerId, switch.peerInfo.addrs)
   let response = getResponseOrRaise(AutonatMsg.decode(await conn.readLp(1024)))
-  return case response.status:
+  return
+    case response.status
     of ResponseStatus.Ok:
-      response.ma.get()
+      response.ma.tryGet()
     of ResponseStatus.DialError:
-      raise newException(AutonatUnreachableError, "Peer could not dial us back: " & response.text.get(""))
+      raise newException(
+        AutonatUnreachableError, "Peer could not dial us back: " & response.text.get("")
+      )
     else:
-      raise newException(AutonatError, "Bad status " & $response.status & " " & response.text.get(""))
+      raise newException(
+        AutonatError, "Bad status " & $response.status & " " & response.text.get("")
+      )

libp2p/protocols/connectivity/autonat/core.nim

@@ -7,17 +7,11 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[options, sets, sequtils]
 import stew/[results, objects]
 import chronos, chronicles
-import ../../../multiaddress,
-       ../../../peerid,
-       ../../../errors
+import ../../../multiaddress, ../../../peerid, ../../../errors
 
 logScope:
   topics = "libp2p autonat"
@@ -42,26 +36,31 @@ type
     InternalError = 300
 
   AutonatPeerInfo* = object
-    id*: Option[PeerId]
+    id*: Opt[PeerId]
     addrs*: seq[MultiAddress]
 
   AutonatDial* = object
-    peerInfo*: Option[AutonatPeerInfo]
+    peerInfo*: Opt[AutonatPeerInfo]
 
   AutonatDialResponse* = object
     status*: ResponseStatus
-    text*: Option[string]
-    ma*: Option[MultiAddress]
+    text*: Opt[string]
+    ma*: Opt[MultiAddress]
 
   AutonatMsg* = object
     msgType*: MsgType
-    dial*: Option[AutonatDial]
-    response*: Option[AutonatDialResponse]
+    dial*: Opt[AutonatDial]
+    response*: Opt[AutonatDialResponse]
+
+  NetworkReachability* {.pure.} = enum
+    Unknown
+    NotReachable
+    Reachable
 
 proc encode(p: AutonatPeerInfo): ProtoBuffer =
   result = initProtoBuffer()
-  if p.id.isSome():
-    result.write(1, p.id.get())
+  p.id.withValue(id):
+    result.write(1, id)
   for ma in p.addrs:
     result.write(2, ma.data.buffer)
   result.finish()
@@ -70,8 +69,8 @@ proc encode*(d: AutonatDial): ProtoBuffer =
   result = initProtoBuffer()
   result.write(1, MsgType.Dial.uint)
   var dial = initProtoBuffer()
-  if d.peerInfo.isSome():
-    dial.write(1, encode(d.peerInfo.get()))
+  d.peerInfo.withValue(pinfo):
+    dial.write(1, encode(pinfo))
   dial.finish()
   result.write(2, dial.buffer)
   result.finish()
@@ -81,72 +80,62 @@ proc encode*(r: AutonatDialResponse): ProtoBuffer =
   result.write(1, MsgType.DialResponse.uint)
   var bufferResponse = initProtoBuffer()
   bufferResponse.write(1, r.status.uint)
-  if r.text.isSome():
-    bufferResponse.write(2, r.text.get())
-  if r.ma.isSome():
-    bufferResponse.write(3, r.ma.get())
+  r.text.withValue(text):
+    bufferResponse.write(2, text)
+  r.ma.withValue(ma):
+    bufferResponse.write(3, ma)
   bufferResponse.finish()
   result.write(3, bufferResponse.buffer)
   result.finish()
 
 proc encode*(msg: AutonatMsg): ProtoBuffer =
-  if msg.dial.isSome():
-    return encode(msg.dial.get())
-  if msg.response.isSome():
-    return encode(msg.response.get())
+  msg.dial.withValue(dial):
+    return encode(dial)
+  msg.response.withValue(res):
+    return encode(res)
 
-proc decode*(_: typedesc[AutonatMsg], buf: seq[byte]): Option[AutonatMsg] =
+proc decode*(_: typedesc[AutonatMsg], buf: seq[byte]): Opt[AutonatMsg] =
   var
     msgTypeOrd: uint32
     pbDial: ProtoBuffer
     pbResponse: ProtoBuffer
     msg: AutonatMsg
 
-  let
-    pb = initProtoBuffer(buf)
-    r1 = pb.getField(1, msgTypeOrd)
-    r2 = pb.getField(2, pbDial)
-    r3 = pb.getField(3, pbResponse)
-  if r1.isErr() or r2.isErr() or r3.isErr(): return none(AutonatMsg)
+  let pb = initProtoBuffer(buf)
 
-  if r1.get() and not checkedEnumAssign(msg.msgType, msgTypeOrd):
-    return none(AutonatMsg)
-  if r2.get():
+  if ?pb.getField(1, msgTypeOrd).toOpt() and
+      not checkedEnumAssign(msg.msgType, msgTypeOrd):
+    return Opt.none(AutonatMsg)
+  if ?pb.getField(2, pbDial).toOpt():
     var
       pbPeerInfo: ProtoBuffer
       dial: AutonatDial
-    let
-      r4 = pbDial.getField(1, pbPeerInfo)
-    if r4.isErr(): return none(AutonatMsg)
+    let r4 = ?pbDial.getField(1, pbPeerInfo).toOpt()
 
     var peerInfo: AutonatPeerInfo
-    if r4.get():
+    if r4:
       var pid: PeerId
       let
-        r5 = pbPeerInfo.getField(1, pid)
-        r6 = pbPeerInfo.getRepeatedField(2, peerInfo.addrs)
-      if r5.isErr() or r6.isErr(): return none(AutonatMsg)
-      if r5.get(): peerInfo.id = some(pid)
-      dial.peerInfo = some(peerInfo)
-    msg.dial = some(dial)
+        r5 = ?pbPeerInfo.getField(1, pid).toOpt()
+        r6 = ?pbPeerInfo.getRepeatedField(2, peerInfo.addrs).toOpt()
+      if r5:
+        peerInfo.id = Opt.some(pid)
+      dial.peerInfo = Opt.some(peerInfo)
+    msg.dial = Opt.some(dial)
 
-  if r3.get():
+  if ?pb.getField(3, pbResponse).toOpt():
     var
       statusOrd: uint
       text: string
       ma: MultiAddress
       response: AutonatDialResponse
 
-    let
-      r4 = pbResponse.getField(1, statusOrd)
-      r5 = pbResponse.getField(2, text)
-      r6 = pbResponse.getField(3, ma)
-
-    if r4.isErr() or r5.isErr() or r6.isErr() or
-       (r4.get() and not checkedEnumAssign(response.status, statusOrd)):
-      return none(AutonatMsg)
-    if r5.get(): response.text = some(text)
-    if r6.get(): response.ma = some(ma)
-    msg.response = some(response)
-
-  return some(msg)
+    if ?pbResponse.getField(1, statusOrd).optValue():
+      if not checkedEnumAssign(response.status, statusOrd):
+        return Opt.none(AutonatMsg)
+    if ?pbResponse.getField(2, text).optValue():
+      response.text = Opt.some(text)
+    if ?pbResponse.getField(3, ma).optValue():
+      response.ma = Opt.some(ma)
+    msg.response = Opt.some(response)
+  return Opt.some(msg)

libp2p/protocols/connectivity/autonat/server.nim

@@ -7,21 +7,19 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[options, sets, sequtils]
+import std/[sets, sequtils]
 import stew/results
-import chronos, chronicles, stew/objects
-import ../../protocol,
-       ../../../switch,
-       ../../../multiaddress,
-       ../../../multicodec,
-       ../../../peerid,
-       ../../../utils/[semaphore, future],
-       ../../../errors
+import chronos, chronicles
+import
+  ../../protocol,
+  ../../../switch,
+  ../../../multiaddress,
+  ../../../multicodec,
+  ../../../peerid,
+  ../../../utils/[semaphore, future],
+  ../../../errors
 import core
 
 export core
@@ -29,33 +27,36 @@ export core
 logScope:
   topics = "libp2p autonat"
 
-type
-  Autonat* = ref object of LPProtocol
-    sem: AsyncSemaphore
-    switch*: Switch
-    dialTimeout: Duration
+type Autonat* = ref object of LPProtocol
+  sem: AsyncSemaphore
+  switch*: Switch
+  dialTimeout: Duration
 
 proc sendDial(conn: Connection, pid: PeerId, addrs: seq[MultiAddress]) {.async.} =
-  let pb = AutonatDial(peerInfo: some(AutonatPeerInfo(
-                         id: some(pid),
-                         addrs: addrs
-                       ))).encode()
+  let pb = AutonatDial(
+    peerInfo: Opt.some(AutonatPeerInfo(id: Opt.some(pid), addrs: addrs))
+  ).encode()
   await conn.writeLp(pb.buffer)
 
-proc sendResponseError(conn: Connection, status: ResponseStatus, text: string = "") {.async.} =
+proc sendResponseError(
+    conn: Connection, status: ResponseStatus, text: string = ""
+) {.async.} =
   let pb = AutonatDialResponse(
-             status: status,
-             text: if text == "": none(string) else: some(text),
-             ma: none(MultiAddress)
-           ).encode()
+    status: status,
+    text:
+      if text == "":
+        Opt.none(string)
+      else:
+        Opt.some(text)
+    ,
+    ma: Opt.none(MultiAddress),
+  ).encode()
   await conn.writeLp(pb.buffer)
 
 proc sendResponseOk(conn: Connection, ma: MultiAddress) {.async.} =
   let pb = AutonatDialResponse(
-             status: ResponseStatus.Ok,
-             text: some("Ok"),
-             ma: some(ma)
-           ).encode()
+    status: ResponseStatus.Ok, text: Opt.some("Ok"), ma: Opt.some(ma)
+  ).encode()
   await conn.writeLp(pb.buffer)
 
 proc tryDial(autonat: Autonat, conn: Connection, addrs: seq[MultiAddress]) {.async.} =
@@ -63,15 +64,21 @@ proc tryDial(autonat: Autonat, conn: Connection, addrs: seq[MultiAddress]) {.asy
   var futs: seq[Future[Opt[MultiAddress]]]
   try:
     # This is to bypass the per peer max connections limit
-    let outgoingConnection = autonat.switch.connManager.expectConnection(conn.peerId)
+    let outgoingConnection =
+      autonat.switch.connManager.expectConnection(conn.peerId, Out)
+    if outgoingConnection.failed() and
+        outgoingConnection.error of AlreadyExpectingConnectionError:
+      await conn.sendResponseError(DialRefused, outgoingConnection.error.msg)
+      return
     # Safer to always try to cancel cause we aren't sure if the connection was established
-    defer: outgoingConnection.cancel()
+    defer:
+      outgoingConnection.cancel()
     # tryDial is to bypass the global max connections limit
     futs = addrs.mapIt(autonat.switch.dialer.tryDial(conn.peerId, @[it]))
     let fut = await anyCompleted(futs).wait(autonat.dialTimeout)
     let ma = await fut
-    if ma.isSome:
-      await conn.sendResponseOk(ma.get())
+    ma.withValue(maddr):
+      await conn.sendResponseOk(maddr)
     else:
       await conn.sendResponseError(DialError, "Missing observed address")
   except CancelledError as exc:
@@ -92,42 +99,45 @@ proc tryDial(autonat: Autonat, conn: Connection, addrs: seq[MultiAddress]) {.asy
         f.cancel()
 
 proc handleDial(autonat: Autonat, conn: Connection, msg: AutonatMsg): Future[void] =
-  if msg.dial.isNone() or msg.dial.get().peerInfo.isNone():
+  let dial = msg.dial.valueOr:
+    return conn.sendResponseError(BadRequest, "Missing Dial")
+  let peerInfo = dial.peerInfo.valueOr:
     return conn.sendResponseError(BadRequest, "Missing Peer Info")
-  let peerInfo = msg.dial.get().peerInfo.get()
-  if peerInfo.id.isSome() and peerInfo.id.get() != conn.peerId:
-    return conn.sendResponseError(BadRequest, "PeerId mismatch")
+  peerInfo.id.withValue(id):
+    if id != conn.peerId:
+      return conn.sendResponseError(BadRequest, "PeerId mismatch")
 
-  if conn.observedAddr.isNone:
+  let observedAddr = conn.observedAddr.valueOr:
     return conn.sendResponseError(BadRequest, "Missing observed address")
-  let observedAddr = conn.observedAddr.get()
 
-  var isRelayed = observedAddr.contains(multiCodec("p2p-circuit"))
-  if isRelayed.isErr() or isRelayed.get():
-    return conn.sendResponseError(DialRefused, "Refused to dial a relayed observed address")
-  let hostIp = observedAddr[0]
-  if hostIp.isErr() or not IP.match(hostIp.get()):
-    trace "wrong observed address", address=observedAddr
+  var isRelayed = observedAddr.contains(multiCodec("p2p-circuit")).valueOr:
+    return conn.sendResponseError(DialRefused, "Invalid observed address")
+  if isRelayed:
+    return
+      conn.sendResponseError(DialRefused, "Refused to dial a relayed observed address")
+  let hostIp = observedAddr[0].valueOr:
+    return conn.sendResponseError(InternalError, "Wrong observed address")
+  if not IP.match(hostIp):
     return conn.sendResponseError(InternalError, "Expected an IP address")
   var addrs = initHashSet[MultiAddress]()
   addrs.incl(observedAddr)
   trace "addrs received", addrs = peerInfo.addrs
   for ma in peerInfo.addrs:
-    isRelayed = ma.contains(multiCodec("p2p-circuit"))
-    if isRelayed.isErr() or isRelayed.get():
+    isRelayed = ma.contains(multiCodec("p2p-circuit")).valueOr:
       continue
-    let maFirst = ma[0]
-    if maFirst.isErr() or not DNS_OR_IP.match(maFirst.get()):
+    let maFirst = ma[0].valueOr:
+      continue
+    if not DNS_OR_IP.match(maFirst):
       continue
 
     try:
       addrs.incl(
-        if maFirst.get() == hostIp.get():
+        if maFirst == hostIp:
           ma
         else:
-          let maEnd = ma[1..^1]
-          if maEnd.isErr(): continue
-          hostIp.get() & maEnd.get()
+          let maEnd = ma[1 ..^ 1].valueOr:
+            continue
+          hostIp & maEnd
       )
     except LPError as exc:
       continue
@@ -140,14 +150,17 @@ proc handleDial(autonat: Autonat, conn: Connection, msg: AutonatMsg): Future[voi
   trace "trying to dial", addrs = addrsSeq
   return autonat.tryDial(conn, addrsSeq)
 
-proc new*(T: typedesc[Autonat], switch: Switch, semSize: int = 1, dialTimeout = 15.seconds): T =
-  let autonat = T(switch: switch, sem: newAsyncSemaphore(semSize), dialTimeout: dialTimeout)
-  proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
+proc new*(
+    T: typedesc[Autonat], switch: Switch, semSize: int = 1, dialTimeout = 15.seconds
+): T =
+  let autonat =
+    T(switch: switch, sem: newAsyncSemaphore(semSize), dialTimeout: dialTimeout)
+  proc handleStream(conn: Connection, proto: string) {.async.} =
     try:
-      let msgOpt = AutonatMsg.decode(await conn.readLp(1024))
-      if msgOpt.isNone() or msgOpt.get().msgType != MsgType.Dial:
+      let msg = AutonatMsg.decode(await conn.readLp(1024)).valueOr:
         raise newException(AutonatError, "Received malformed message")
-      let msg = msgOpt.get()
+      if msg.msgType != MsgType.Dial:
+        raise newException(AutonatError, "Message type should be dial")
       await autonat.handleDial(conn, msg)
     except CancelledError as exc:
       raise exc

libp2p/protocols/connectivity/autonat/service.nim

@@ -7,59 +7,67 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[options, deques, sequtils]
+import std/[deques, sequtils]
 import chronos, metrics
 import ../../../switch
+import ../../../wire
 import client
+from core import NetworkReachability, AutonatUnreachableError
 import ../../../utils/heartbeat
 import ../../../crypto/crypto
 
+export core.NetworkReachability
+
 logScope:
   topics = "libp2p autonatservice"
 
-declarePublicGauge(libp2p_autonat_reachability_confidence, "autonat reachability confidence", labels = ["reachability"])
+declarePublicGauge(
+  libp2p_autonat_reachability_confidence,
+  "autonat reachability confidence",
+  labels = ["reachability"],
+)
 
 type
   AutonatService* = ref object of Service
     newConnectedPeerHandler: PeerEventHandler
+    addressMapper: AddressMapper
     scheduleHandle: Future[void]
-    networkReachability: NetworkReachability
-    confidence: Option[float]
+    networkReachability*: NetworkReachability
+    confidence: Opt[float]
     answers: Deque[NetworkReachability]
     autonatClient: AutonatClient
     statusAndConfidenceHandler: StatusAndConfidenceHandler
     rng: ref HmacDrbgContext
-    scheduleInterval: Option[Duration]
+    scheduleInterval: Opt[Duration]
     askNewConnectedPeers: bool
     numPeersToAsk: int
     maxQueueSize: int
     minConfidence: float
     dialTimeout: Duration
+    enableAddressMapper: bool
 
-  NetworkReachability* {.pure.} = enum
-    NotReachable, Reachable, Unknown
-
-  StatusAndConfidenceHandler* = proc (networkReachability: NetworkReachability, confidence: Option[float]): Future[void]  {.gcsafe, raises: [Defect].}
+  StatusAndConfidenceHandler* = proc(
+    networkReachability: NetworkReachability, confidence: Opt[float]
+  ): Future[void] {.gcsafe, raises: [].}
 
 proc new*(
-  T: typedesc[AutonatService],
-  autonatClient: AutonatClient,
-  rng: ref HmacDrbgContext,
-  scheduleInterval: Option[Duration] = none(Duration),
-  askNewConnectedPeers = true,
-  numPeersToAsk: int = 5,
-  maxQueueSize: int = 10,
-  minConfidence: float = 0.3,
-  dialTimeout = 30.seconds): T =
+    T: typedesc[AutonatService],
+    autonatClient: AutonatClient,
+    rng: ref HmacDrbgContext,
+    scheduleInterval: Opt[Duration] = Opt.none(Duration),
+    askNewConnectedPeers = true,
+    numPeersToAsk: int = 5,
+    maxQueueSize: int = 10,
+    minConfidence: float = 0.3,
+    dialTimeout = 30.seconds,
+    enableAddressMapper = true,
+): T =
   return T(
     scheduleInterval: scheduleInterval,
     networkReachability: Unknown,
-    confidence: none(float),
+    confidence: Opt.none(float),
     answers: initDeque[NetworkReachability](),
     autonatClient: autonatClient,
     rng: rng,
@@ -67,10 +75,9 @@ proc new*(
     numPeersToAsk: numPeersToAsk,
     maxQueueSize: maxQueueSize,
     minConfidence: minConfidence,
-    dialTimeout: dialTimeout)
-
-proc networkReachability*(self: AutonatService): NetworkReachability {.inline.} =
-  return self.networkReachability
+    dialTimeout: dialTimeout,
+    enableAddressMapper: enableAddressMapper,
+  )
 
 proc callHandler(self: AutonatService) {.async.} =
   if not isNil(self.statusAndConfidenceHandler):
@@ -80,32 +87,56 @@ proc hasEnoughIncomingSlots(switch: Switch): bool =
   # we leave some margin instead of comparing to 0 as a peer could connect to us while we are asking for the dial back
   return switch.connManager.slotsAvailable(In) >= 2
 
-proc handleAnswer(self: AutonatService, ans: NetworkReachability) {.async.} =
+proc doesPeerHaveIncomingConn(switch: Switch, peerId: PeerId): bool =
+  return switch.connManager.selectMuxer(peerId, In) != nil
 
+proc handleAnswer(
+    self: AutonatService, ans: NetworkReachability
+): Future[bool] {.async.} =
   if ans == Unknown:
     return
 
+  let oldNetworkReachability = self.networkReachability
+  let oldConfidence = self.confidence
+
   if self.answers.len == self.maxQueueSize:
     self.answers.popFirst()
   self.answers.addLast(ans)
 
   self.networkReachability = Unknown
-  self.confidence = none(float)
+  self.confidence = Opt.none(float)
   const reachabilityPriority = [Reachable, NotReachable]
   for reachability in reachabilityPriority:
     let confidence = self.answers.countIt(it == reachability) / self.maxQueueSize
-    libp2p_autonat_reachability_confidence.set(value = confidence, labelValues = [$reachability])
+    libp2p_autonat_reachability_confidence.set(
+      value = confidence, labelValues = [$reachability]
+    )
     if self.confidence.isNone and confidence >= self.minConfidence:
       self.networkReachability = reachability
-      self.confidence = some(confidence)
+      self.confidence = Opt.some(confidence)
 
-  debug "Current status", currentStats = $self.networkReachability, confidence = $self.confidence, answers = self.answers
+  debug "Current status",
+    currentStats = $self.networkReachability,
+    confidence = $self.confidence,
+    answers = self.answers
 
-proc askPeer(self: AutonatService, switch: Switch, peerId: PeerId): Future[NetworkReachability] {.async.} =
+  # Return whether anything has changed
+  return
+    self.networkReachability != oldNetworkReachability or
+    self.confidence != oldConfidence
+
+proc askPeer(
+    self: AutonatService, switch: Switch, peerId: PeerId
+): Future[NetworkReachability] {.async.} =
   logScope:
     peerId = $peerId
+
+  if doesPeerHaveIncomingConn(switch, peerId):
+    return Unknown
+
   if not hasEnoughIncomingSlots(switch):
-    debug "No incoming slots available, not asking peer", incomingSlotsAvailable=switch.connManager.slotsAvailable(In)
+    debug "No incoming slots available, not asking peer",
+      incomingSlotsAvailable = switch.connManager.slotsAvailable(In)
     return Unknown
 
   trace "Asking peer for reachability"
@@ -123,9 +154,10 @@ proc askPeer(self: AutonatService, switch: Switch, peerId: PeerId): Future[Netwo
     except CatchableError as error:
       debug "dialMe unexpected error", msg = error.msg
       Unknown
-  await self.handleAnswer(ans)
-  if not isNil(self.statusAndConfidenceHandler):
-    await self.statusAndConfidenceHandler(self.networkReachability, self.confidence)
+  let hasReachabilityOrConfidenceChanged = await self.handleAnswer(ans)
+  if hasReachabilityOrConfidenceChanged:
+    await self.callHandler()
+  await switch.peerInfo.update()
   return ans
 
 proc askConnectedPeers(self: AutonatService, switch: Switch) {.async.} =
@@ -137,7 +169,8 @@ proc askConnectedPeers(self: AutonatService, switch: Switch) {.async.} =
     if answersFromPeers >= self.numPeersToAsk:
       break
     if not hasEnoughIncomingSlots(switch):
-      debug "No incoming slots available, not asking peers", incomingSlotsAvailable=switch.connManager.slotsAvailable(In)
+      debug "No incoming slots available, not asking peers",
+        incomingSlotsAvailable = switch.connManager.slotsAvailable(In)
       break
     if (await askPeer(self, switch, peer)) != Unknown:
       answersFromPeers.inc()
@@ -146,26 +179,51 @@ proc schedule(service: AutonatService, switch: Switch, interval: Duration) {.asy
   heartbeat "Scheduling AutonatService run", interval:
     await service.run(switch)
 
+proc addressMapper(
+    self: AutonatService, peerStore: PeerStore, listenAddrs: seq[MultiAddress]
+): Future[seq[MultiAddress]] {.async.} =
+  if self.networkReachability != NetworkReachability.Reachable:
+    return listenAddrs
+
+  var addrs = newSeq[MultiAddress]()
+  for listenAddr in listenAddrs:
+    var processedMA = listenAddr
+    try:
+      if not listenAddr.isPublicMA() and
+          self.networkReachability == NetworkReachability.Reachable:
+        processedMA = peerStore.guessDialableAddr(listenAddr)
+          # handle manual port forwarding
+    except CatchableError as exc:
+      debug "Error while handling address mapper", msg = exc.msg
+    addrs.add(processedMA)
+  return addrs
+
 method setup*(self: AutonatService, switch: Switch): Future[bool] {.async.} =
+  self.addressMapper = proc(
+      listenAddrs: seq[MultiAddress]
+  ): Future[seq[MultiAddress]] {.async.} =
+    return await addressMapper(self, switch.peerStore, listenAddrs)
+
   info "Setting up AutonatService"
   let hasBeenSetup = await procCall Service(self).setup(switch)
   if hasBeenSetup:
     if self.askNewConnectedPeers:
-      self.newConnectedPeerHandler = proc (peerId: PeerId, event: PeerEvent): Future[void] {.async.} =
-        if switch.connManager.selectConn(peerId, In) != nil: # no need to ask an incoming peer
-          return
+      self.newConnectedPeerHandler = proc(
+          peerId: PeerId, event: PeerEvent
+      ): Future[void] {.async.} =
         discard askPeer(self, switch, peerId)
-        await self.callHandler()
-      switch.connManager.addPeerEventHandler(self.newConnectedPeerHandler, PeerEventKind.Joined)
-    if self.scheduleInterval.isSome():
-      self.scheduleHandle = schedule(self, switch, self.scheduleInterval.get())
+      switch.connManager.addPeerEventHandler(
+        self.newConnectedPeerHandler, PeerEventKind.Joined
+      )
+    self.scheduleInterval.withValue(interval):
+      self.scheduleHandle = schedule(self, switch, interval)
+    if self.enableAddressMapper:
+      switch.peerInfo.addressMappers.add(self.addressMapper)
   return hasBeenSetup
 
 method run*(self: AutonatService, switch: Switch) {.async, public.} =
   trace "Running AutonatService"
   await askConnectedPeers(self, switch)
-  await self.callHandler()
-
 
 method stop*(self: AutonatService, switch: Switch): Future[bool] {.async, public.} =
   info "Stopping AutonatService"
@@ -175,8 +233,15 @@ method stop*(self: AutonatService, switch: Switch): Future[bool] {.async, public
       self.scheduleHandle.cancel()
       self.scheduleHandle = nil
     if not isNil(self.newConnectedPeerHandler):
-      switch.connManager.removePeerEventHandler(self.newConnectedPeerHandler, PeerEventKind.Joined)
+      switch.connManager.removePeerEventHandler(
+        self.newConnectedPeerHandler, PeerEventKind.Joined
+      )
+    if self.enableAddressMapper:
+      switch.peerInfo.addressMappers.keepItIf(it != self.addressMapper)
+    await switch.peerInfo.update()
   return hasBeenStopped
 
-proc statusAndConfidenceHandler*(self: AutonatService, statusAndConfidenceHandler: StatusAndConfidenceHandler) =
+proc statusAndConfidenceHandler*(
+    self: AutonatService, statusAndConfidenceHandler: StatusAndConfidenceHandler
+) =
   self.statusAndConfidenceHandler = statusAndConfidenceHandler

libp2p/protocols/connectivity/dcutr/client.nim

@@ -0,0 +1,114 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+{.push raises: [].}
+
+import std/sequtils
+
+import stew/results
+import chronos, chronicles
+
+import core
+import
+  ../../protocol, ../../../stream/connection, ../../../switch, ../../../utils/future
+
+export DcutrError
+
+type DcutrClient* = ref object
+  connectTimeout: Duration
+  maxDialableAddrs: int
+
+logScope:
+  topics = "libp2p dcutrclient"
+
+proc new*(
+    T: typedesc[DcutrClient], connectTimeout = 15.seconds, maxDialableAddrs = 8
+): T =
+  return T(connectTimeout: connectTimeout, maxDialableAddrs: maxDialableAddrs)
+
+proc startSync*(
+    self: DcutrClient, switch: Switch, remotePeerId: PeerId, addrs: seq[MultiAddress]
+) {.async.} =
+  logScope:
+    peerId = switch.peerInfo.peerId
+
+  var
+    peerDialableAddrs: seq[MultiAddress]
+    stream: Connection
+  try:
+    var ourDialableAddrs = getHolePunchableAddrs(addrs)
+    if ourDialableAddrs.len == 0:
+      debug "Dcutr initiator has no supported dialable addresses. Aborting Dcutr.",
+        addrs
+      return
+
+    stream = await switch.dial(remotePeerId, DcutrCodec)
+    await stream.send(MsgType.Connect, addrs)
+    debug "Dcutr initiator has sent a Connect message."
+    let rttStart = Moment.now()
+    let connectAnswer = DcutrMsg.decode(await stream.readLp(1024))
+
+    peerDialableAddrs = getHolePunchableAddrs(connectAnswer.addrs)
+    if peerDialableAddrs.len == 0:
+      debug "Dcutr receiver has no supported dialable addresses to connect to. Aborting Dcutr.",
+        addrs = connectAnswer.addrs
+      return
+
+    let rttEnd = Moment.now()
+    debug "Dcutr initiator has received a Connect message back.", connectAnswer
+    let halfRtt = (rttEnd - rttStart) div 2'i64
+    await stream.send(MsgType.Sync, @[])
+    debug "Dcutr initiator has sent a Sync message."
+    await sleepAsync(halfRtt)
+
+    if peerDialableAddrs.len > self.maxDialableAddrs:
+      peerDialableAddrs = peerDialableAddrs[0 ..< self.maxDialableAddrs]
+    var futs = peerDialableAddrs.mapIt(
+      switch.connect(
+        stream.peerId,
+        @[it],
+        forceDial = true,
+        reuseConnection = false,
+        dir = Direction.In,
+      )
+    )
+    try:
+      discard await anyCompleted(futs).wait(self.connectTimeout)
+      debug "Dcutr initiator has directly connected to the remote peer."
+    finally:
+      for fut in futs:
+        fut.cancel()
+  except CancelledError as err:
+    raise err
+  except AllFuturesFailedError as err:
+    debug "Dcutr initiator could not connect to the remote peer, all connect attempts failed",
+      peerDialableAddrs, msg = err.msg
+    raise newException(
+      DcutrError,
+      "Dcutr initiator could not connect to the remote peer, all connect attempts failed",
+      err,
+    )
+  except AsyncTimeoutError as err:
+    debug "Dcutr initiator could not connect to the remote peer, all connect attempts timed out",
+      peerDialableAddrs, msg = err.msg
+    raise newException(
+      DcutrError,
+      "Dcutr initiator could not connect to the remote peer, all connect attempts timed out",
+      err,
+    )
+  except CatchableError as err:
+    debug "Unexpected error when Dcutr initiator tried to connect to the remote peer",
+      err = err.msg
+    raise newException(
+      DcutrError,
+      "Unexpected error when Dcutr initiator tried to connect to the remote peer", err,
+    )
+  finally:
+    if stream != nil:
+      await stream.close()

libp2p/protocols/connectivity/dcutr/core.nim

@@ -0,0 +1,64 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+{.push raises: [].}
+
+import std/sequtils
+
+import chronos
+import stew/objects
+
+import ../../../multiaddress, ../../../errors, ../../../stream/connection
+
+export multiaddress
+
+const DcutrCodec* = "/libp2p/dcutr"
+
+type
+  MsgType* = enum
+    Connect = 100
+    Sync = 300
+
+  DcutrMsg* = object
+    msgType*: MsgType
+    addrs*: seq[MultiAddress]
+
+  DcutrError* = object of LPError
+
+proc encode*(msg: DcutrMsg): ProtoBuffer =
+  result = initProtoBuffer()
+  result.write(1, msg.msgType.uint)
+  for addr in msg.addrs:
+    result.write(2, addr)
+  result.finish()
+
+proc decode*(_: typedesc[DcutrMsg], buf: seq[byte]): DcutrMsg {.raises: [DcutrError].} =
+  var
+    msgTypeOrd: uint32
+    dcutrMsg: DcutrMsg
+  var pb = initProtoBuffer(buf)
+  var r1 = pb.getField(1, msgTypeOrd)
+  let r2 = pb.getRepeatedField(2, dcutrMsg.addrs)
+  if r1.isErr or r2.isErr or not checkedEnumAssign(dcutrMsg.msgType, msgTypeOrd):
+    raise newException(DcutrError, "Received malformed message")
+  return dcutrMsg
+
+proc send*(conn: Connection, msgType: MsgType, addrs: seq[MultiAddress]) {.async.} =
+  let pb = DcutrMsg(msgType: msgType, addrs: addrs).encode()
+  await conn.writeLp(pb.buffer)
+
+proc getHolePunchableAddrs*(
+    addrs: seq[MultiAddress]
+): seq[MultiAddress] {.raises: [LPError].} =
+  var result = newSeq[MultiAddress]()
+  for a in addrs:
+    # This is necessary to also accept addrs like /ip4/198.51.100/tcp/1234/p2p/QmYyQSo1c1Ym7orWxLYvCrM2EmxFTANf8wXmmE7DWjhx5N
+    if [TCP, mapAnd(TCP_DNS, P2PPattern), mapAnd(TCP_IP, P2PPattern)].anyIt(it.match(a)):
+      result.add(a[0 .. 1].tryGet())
+  return result

libp2p/protocols/connectivity/dcutr/server.nim

@@ -0,0 +1,94 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+{.push raises: [].}
+
+import std/[sets, sequtils]
+import stew/[results, objects]
+import chronos, chronicles
+
+import core
+import
+  ../../protocol, ../../../stream/connection, ../../../switch, ../../../utils/future
+
+export chronicles
+
+type Dcutr* = ref object of LPProtocol
+
+logScope:
+  topics = "libp2p dcutr"
+
+proc new*(
+    T: typedesc[Dcutr],
+    switch: Switch,
+    connectTimeout = 15.seconds,
+    maxDialableAddrs = 8,
+): T =
+  proc handleStream(stream: Connection, proto: string) {.async.} =
+    var peerDialableAddrs: seq[MultiAddress]
+    try:
+      let connectMsg = DcutrMsg.decode(await stream.readLp(1024))
+      debug "Dcutr receiver received a Connect message.", connectMsg
+
+      var ourAddrs = switch.peerStore.getMostObservedProtosAndPorts()
+        # likely empty when the peer is reachable
+      if ourAddrs.len == 0:
+        # this list should be the same as the peer's public addrs when it is reachable
+        ourAddrs =
+          switch.peerInfo.listenAddrs.mapIt(switch.peerStore.guessDialableAddr(it))
+      var ourDialableAddrs = getHolePunchableAddrs(ourAddrs)
+      if ourDialableAddrs.len == 0:
+        debug "Dcutr receiver has no supported dialable addresses. Aborting Dcutr.",
+          ourAddrs
+        return
+
+      await stream.send(MsgType.Connect, ourAddrs)
+      debug "Dcutr receiver has sent a Connect message back."
+      let syncMsg = DcutrMsg.decode(await stream.readLp(1024))
+      debug "Dcutr receiver has received a Sync message.", syncMsg
+
+      peerDialableAddrs = getHolePunchableAddrs(connectMsg.addrs)
+      if peerDialableAddrs.len == 0:
+        debug "Dcutr initiator has no supported dialable addresses to connect to. Aborting Dcutr.",
+          addrs = connectMsg.addrs
+        return
+
+      if peerDialableAddrs.len > maxDialableAddrs:
+        peerDialableAddrs = peerDialableAddrs[0 ..< maxDialableAddrs]
+      var futs = peerDialableAddrs.mapIt(
+        switch.connect(
+          stream.peerId,
+          @[it],
+          forceDial = true,
+          reuseConnection = false,
+          dir = Direction.Out,
+        )
+      )
+      try:
+        discard await anyCompleted(futs).wait(connectTimeout)
+        debug "Dcutr receiver has directly connected to the remote peer."
+      finally:
+        for fut in futs:
+          fut.cancel()
+    except CancelledError as err:
+      raise err
+    except AllFuturesFailedError as err:
+      debug "Dcutr receiver could not connect to the remote peer, " &
+        "all connect attempts failed", peerDialableAddrs, msg = err.msg
+    except AsyncTimeoutError as err:
+      debug "Dcutr receiver could not connect to the remote peer, " &
+        "all connect attempts timed out", peerDialableAddrs, msg = err.msg
+    except CatchableError as err:
+      warn "Unexpected error when Dcutr receiver tried to connect " &
+        "to the remote peer", msg = err.msg
+
+  let self = T()
+  self.handler = handleStream
+  self.codec = DcutrCodec
+  self

libp2p/protocols/connectivity/relay/client.nim

@@ -7,25 +7,19 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
-
-import times, options
+{.push raises: [].}
 
+import times
 import chronos, chronicles
-
-import ./relay,
-       ./messages,
-       ./rconn,
-       ./utils,
-       ../../../peerinfo,
-       ../../../switch,
-       ../../../multiaddress,
-       ../../../stream/connection
-
-export options
+import
+  ./relay,
+  ./messages,
+  ./rconn,
+  ./utils,
+  ../../../peerinfo,
+  ../../../switch,
+  ../../../multiaddress,
+  ../../../stream/connection
 
 logScope:
   topics = "libp2p relay relay-client"
@@ -37,38 +31,37 @@ type
   ReservationError* = object of RelayClientError
   RelayV1DialError* = object of RelayClientError
   RelayV2DialError* = object of RelayClientError
-  RelayClientAddConn* = proc(conn: Connection,
-                        duration: uint32,
-                        data: uint64): Future[void] {.gcsafe, raises: [Defect].}
+  RelayClientAddConn* = proc(
+    conn: Connection, duration: uint32, data: uint64
+  ): Future[void] {.gcsafe, raises: [].}
   RelayClient* = ref object of Relay
     onNewConnection*: RelayClientAddConn
     canHop: bool
 
   Rsvp* = object
-    expire*: uint64           # required, Unix expiration time (UTC)
+    expire*: uint64 # required, Unix expiration time (UTC)
     addrs*: seq[MultiAddress] # relay address for reserving peer
-    voucher*: Option[Voucher] # optional, reservation voucher
-    limitDuration*: uint32    # seconds
-    limitData*: uint64        # bytes
+    voucher*: Opt[Voucher] # optional, reservation voucher
+    limitDuration*: uint32 # seconds
+    limitData*: uint64 # bytes
 
 proc sendStopError(conn: Connection, code: StatusV2) {.async.} =
   trace "send stop status", status = $code & " (" & $ord(code) & ")"
-  let msg = StopMessage(msgType: StopMessageType.Status, status: some(code))
+  let msg = StopMessage(msgType: StopMessageType.Status, status: Opt.some(code))
   await conn.writeLp(encode(msg).buffer)
 
-proc handleRelayedConnect(cl: RelayClient, conn: Connection, msg: StopMessage) {.async.} =
-  if msg.peer.isNone():
-    await sendStopError(conn, MalformedMessage)
-    return
+proc handleRelayedConnect(
+    cl: RelayClient, conn: Connection, msg: StopMessage
+) {.async.} =
   let
     # TODO: check the go version to see in which way this could fail
     # it's unclear in the spec
-    src = msg.peer.get()
+    src = msg.peer.valueOr:
+      await sendStopError(conn, MalformedMessage)
+      return
     limitDuration = msg.limit.duration
     limitData = msg.limit.data
-    msg = StopMessage(
-      msgType: StopMessageType.Status,
-      status: some(Ok))
+    msg = StopMessage(msgType: StopMessageType.Status, status: Opt.some(Ok))
     pb = encode(msg)
 
   trace "incoming relay connection", src
@@ -80,146 +73,156 @@ proc handleRelayedConnect(cl: RelayClient, conn: Connection, msg: StopMessage) {
   await conn.writeLp(pb.buffer)
   # This sound redundant but the callback could, in theory, be set to nil during
   # conn.writeLp so it's safer to double check
-  if cl.onNewConnection != nil: await cl.onNewConnection(conn, limitDuration, limitData)
-  else: await conn.close()
+  if cl.onNewConnection != nil:
+    await cl.onNewConnection(conn, limitDuration, limitData)
+  else:
+    await conn.close()
 
-proc reserve*(cl: RelayClient,
-              peerId: PeerId,
-              addrs: seq[MultiAddress] = @[]): Future[Rsvp] {.async.} =
+proc reserve*(
+    cl: RelayClient, peerId: PeerId, addrs: seq[MultiAddress] = @[]
+): Future[Rsvp] {.async.} =
   let conn = await cl.switch.dial(peerId, addrs, RelayV2HopCodec)
-  defer: await conn.close()
+  defer:
+    await conn.close()
   let
     pb = encode(HopMessage(msgType: HopMessageType.Reserve))
-    msg = try:
-      await conn.writeLp(pb.buffer)
-      HopMessage.decode(await conn.readLp(RelayClientMsgSize)).get()
-    except CancelledError as exc:
-      raise exc
-    except CatchableError as exc:
-      trace "error writing or reading reservation message", exc=exc.msg
-      raise newException(ReservationError, exc.msg)
+    msg =
+      try:
+        await conn.writeLp(pb.buffer)
+        HopMessage.decode(await conn.readLp(RelayClientMsgSize)).tryGet()
+      except CancelledError as exc:
+        raise exc
+      except CatchableError as exc:
+        trace "error writing or reading reservation message", exc = exc.msg
+        raise newException(ReservationError, exc.msg)
 
   if msg.msgType != HopMessageType.Status:
     raise newException(ReservationError, "Unexpected relay response type")
   if msg.status.get(UnexpectedMessage) != Ok:
     raise newException(ReservationError, "Reservation failed")
-  if msg.reservation.isNone():
-    raise newException(ReservationError, "Missing reservation information")
 
-  let reservation = msg.reservation.get()
+  let reservation = msg.reservation.valueOr:
+    raise newException(ReservationError, "Missing reservation information")
   if reservation.expire > int64.high().uint64 or
-     now().utc > reservation.expire.int64.fromUnix.utc:
+      now().utc > reservation.expire.int64.fromUnix.utc:
     raise newException(ReservationError, "Bad expiration date")
   result.expire = reservation.expire
   result.addrs = reservation.addrs
 
-  if reservation.svoucher.isSome():
-    let svoucher = SignedVoucher.decode(reservation.svoucher.get())
-    if svoucher.isErr() or svoucher.get().data.relayPeerId != peerId:
+  reservation.svoucher.withValue(sv):
+    let svoucher = SignedVoucher.decode(sv).valueOr:
       raise newException(ReservationError, "Invalid voucher")
-    result.voucher = some(svoucher.get().data)
+    if svoucher.data.relayPeerId != peerId:
+      raise newException(ReservationError, "Invalid voucher PeerId")
+    result.voucher = Opt.some(svoucher.data)
 
   result.limitDuration = msg.limit.duration
   result.limitData = msg.limit.data
 
 proc dialPeerV1*(
-    cl: RelayClient,
-    conn: Connection,
-    dstPeerId: PeerId,
-    dstAddrs: seq[MultiAddress]): Future[Connection] {.async.} =
+    cl: RelayClient, conn: Connection, dstPeerId: PeerId, dstAddrs: seq[MultiAddress]
+): Future[Connection] {.async.} =
   var
     msg = RelayMessage(
-      msgType: some(RelayType.Hop),
-      srcPeer: some(RelayPeer(peerId: cl.switch.peerInfo.peerId, addrs: cl.switch.peerInfo.addrs)),
-      dstPeer: some(RelayPeer(peerId: dstPeerId, addrs: dstAddrs)))
+      msgType: Opt.some(RelayType.Hop),
+      srcPeer: Opt.some(
+        RelayPeer(peerId: cl.switch.peerInfo.peerId, addrs: cl.switch.peerInfo.addrs)
+      ),
+      dstPeer: Opt.some(RelayPeer(peerId: dstPeerId, addrs: dstAddrs)),
+    )
     pb = encode(msg)
 
-  trace "Dial peer", msgSend=msg
+  trace "Dial peer", msgSend = msg
 
   try:
     await conn.writeLp(pb.buffer)
   except CancelledError as exc:
     raise exc
   except CatchableError as exc:
-    trace "error writing hop request", exc=exc.msg
+    trace "error writing hop request", exc = exc.msg
     raise exc
 
-  let msgRcvFromRelayOpt = try:
-    RelayMessage.decode(await conn.readLp(RelayClientMsgSize))
-  except CancelledError as exc:
-    raise exc
-  except CatchableError as exc:
-    trace "error reading stop response", exc=exc.msg
-    await sendStatus(conn, StatusV1.HopCantOpenDstStream)
-    raise exc
+  let msgRcvFromRelayOpt =
+    try:
+      RelayMessage.decode(await conn.readLp(RelayClientMsgSize))
+    except CancelledError as exc:
+      raise exc
+    except CatchableError as exc:
+      trace "error reading stop response", exc = exc.msg
+      await sendStatus(conn, StatusV1.HopCantOpenDstStream)
+      raise exc
 
   try:
-    if msgRcvFromRelayOpt.isNone:
+    let msgRcvFromRelay = msgRcvFromRelayOpt.valueOr:
       raise newException(RelayV1DialError, "Hop can't open destination stream")
-    let msgRcvFromRelay = msgRcvFromRelayOpt.get()
-    if msgRcvFromRelay.msgType.isNone or msgRcvFromRelay.msgType.get() != RelayType.Status:
-      raise newException(RelayV1DialError, "Hop can't open destination stream: wrong message type")
-    if msgRcvFromRelay.status.isNone or msgRcvFromRelay.status.get() != StatusV1.Success:
-      raise newException(RelayV1DialError, "Hop can't open destination stream: status failed")
+    if msgRcvFromRelay.msgType.tryGet() != RelayType.Status:
+      raise newException(
+        RelayV1DialError, "Hop can't open destination stream: wrong message type"
+      )
+    if msgRcvFromRelay.status.tryGet() != StatusV1.Success:
+      raise newException(
+        RelayV1DialError, "Hop can't open destination stream: status failed"
+      )
   except RelayV1DialError as exc:
     await sendStatus(conn, StatusV1.HopCantOpenDstStream)
     raise exc
+  except ValueError as exc:
+    await sendStatus(conn, StatusV1.HopCantOpenDstStream)
+    raise newException(RelayV1DialError, exc.msg)
   result = conn
 
 proc dialPeerV2*(
     cl: RelayClient,
     conn: RelayConnection,
     dstPeerId: PeerId,
-    dstAddrs: seq[MultiAddress]): Future[Connection] {.async.} =
+    dstAddrs: seq[MultiAddress],
+): Future[Connection] {.async.} =
   let
     p = Peer(peerId: dstPeerId, addrs: dstAddrs)
-    pb = encode(HopMessage(msgType: HopMessageType.Connect, peer: some(p)))
+    pb = encode(HopMessage(msgType: HopMessageType.Connect, peer: Opt.some(p)))
 
   trace "Dial peer", p
 
-  let msgRcvFromRelay = try:
-    await conn.writeLp(pb.buffer)
-    HopMessage.decode(await conn.readLp(RelayClientMsgSize)).get()
-  except CancelledError as exc:
-    raise exc
-  except CatchableError as exc:
-    trace "error reading stop response", exc=exc.msg
-    raise newException(RelayV2DialError, exc.msg)
+  let msgRcvFromRelay =
+    try:
+      await conn.writeLp(pb.buffer)
+      HopMessage.decode(await conn.readLp(RelayClientMsgSize)).tryGet()
+    except CancelledError as exc:
+      raise exc
+    except CatchableError as exc:
+      trace "error reading stop response", exc = exc.msg
+      raise newException(RelayV2DialError, exc.msg)
 
   if msgRcvFromRelay.msgType != HopMessageType.Status:
     raise newException(RelayV2DialError, "Unexpected stop response")
   if msgRcvFromRelay.status.get(UnexpectedMessage) != Ok:
-    trace "Relay stop failed", msg = msgRcvFromRelay.status.get()
+    trace "Relay stop failed", msg = msgRcvFromRelay.status
     raise newException(RelayV2DialError, "Relay stop failure")
   conn.limitDuration = msgRcvFromRelay.limit.duration
   conn.limitData = msgRcvFromRelay.limit.data
   return conn
 
-proc handleStopStreamV2(cl: RelayClient, conn: Connection) {.async, gcsafe.} =
-  let msgOpt = StopMessage.decode(await conn.readLp(RelayClientMsgSize))
-  if msgOpt.isNone():
+proc handleStopStreamV2(cl: RelayClient, conn: Connection) {.async.} =
+  let msg = StopMessage.decode(await conn.readLp(RelayClientMsgSize)).valueOr:
     await sendHopStatus(conn, MalformedMessage)
     return
-  trace "client circuit relay v2 handle stream", msg = msgOpt.get()
-  let msg = msgOpt.get()
+  trace "client circuit relay v2 handle stream", msg
 
   if msg.msgType == StopMessageType.Connect:
     await cl.handleRelayedConnect(conn, msg)
   else:
-    trace "Unexpected client / relayv2 handshake", msgType=msg.msgType
+    trace "Unexpected client / relayv2 handshake", msgType = msg.msgType
     await sendStopError(conn, MalformedMessage)
 
-proc handleStop(cl: RelayClient, conn: Connection, msg: RelayMessage) {.async, gcsafe.} =
-  if msg.srcPeer.isNone:
+proc handleStop(cl: RelayClient, conn: Connection, msg: RelayMessage) {.async.} =
+  let src = msg.srcPeer.valueOr:
     await sendStatus(conn, StatusV1.StopSrcMultiaddrInvalid)
     return
-  let src = msg.srcPeer.get()
 
-  if msg.dstPeer.isNone:
+  let dst = msg.dstPeer.valueOr:
     await sendStatus(conn, StatusV1.StopDstMultiaddrInvalid)
     return
 
-  let dst = msg.dstPeer.get()
   if dst.peerId != cl.switch.peerInfo.peerId:
     await sendStatus(conn, StatusV1.StopDstMultiaddrInvalid)
     return
@@ -233,52 +236,69 @@ proc handleStop(cl: RelayClient, conn: Connection, msg: RelayMessage) {.async, g
   await sendStatus(conn, StatusV1.Success)
   # This sound redundant but the callback could, in theory, be set to nil during
   # sendStatus(Success) so it's safer to double check
-  if cl.onNewConnection != nil: await cl.onNewConnection(conn, 0, 0)
-  else: await conn.close()
+  if cl.onNewConnection != nil:
+    await cl.onNewConnection(conn, 0, 0)
+  else:
+    await conn.close()
 
-proc handleStreamV1(cl: RelayClient, conn: Connection) {.async, gcsafe.} =
-  let msgOpt = RelayMessage.decode(await conn.readLp(RelayClientMsgSize))
-  if msgOpt.isNone:
+proc handleStreamV1(cl: RelayClient, conn: Connection) {.async.} =
+  let msg = RelayMessage.decode(await conn.readLp(RelayClientMsgSize)).valueOr:
     await sendStatus(conn, StatusV1.MalformedMessage)
     return
-  trace "client circuit relay v1 handle stream", msg = msgOpt.get()
-  let msg = msgOpt.get()
-  case msg.msgType.get:
-    of RelayType.Hop:
-      if cl.canHop: await cl.handleHop(conn, msg)
-      else: await sendStatus(conn, StatusV1.HopCantSpeakRelay)
-    of RelayType.Stop: await cl.handleStop(conn, msg)
-    of RelayType.CanHop:
-      if cl.canHop: await sendStatus(conn, StatusV1.Success)
-      else: await sendStatus(conn, StatusV1.HopCantSpeakRelay)
+  trace "client circuit relay v1 handle stream", msg
+
+  let typ = msg.msgType.valueOr:
+    trace "Message type not set"
+    await sendStatus(conn, StatusV1.MalformedMessage)
+    return
+  case typ
+  of RelayType.Hop:
+    if cl.canHop:
+      await cl.handleHop(conn, msg)
     else:
-      trace "Unexpected relay handshake", msgType=msg.msgType
-      await sendStatus(conn, StatusV1.MalformedMessage)
+      await sendStatus(conn, StatusV1.HopCantSpeakRelay)
+  of RelayType.Stop:
+    await cl.handleStop(conn, msg)
+  of RelayType.CanHop:
+    if cl.canHop:
+      await sendStatus(conn, StatusV1.Success)
+    else:
+      await sendStatus(conn, StatusV1.HopCantSpeakRelay)
+  else:
+    trace "Unexpected relay handshake", msgType = msg.msgType
+    await sendStatus(conn, StatusV1.MalformedMessage)
 
-proc new*(T: typedesc[RelayClient], canHop: bool = false,
-     reservationTTL: times.Duration = DefaultReservationTTL,
-     limitDuration: uint32 = DefaultLimitDuration,
-     limitData: uint64 = DefaultLimitData,
-     heartbeatSleepTime: uint32 = DefaultHeartbeatSleepTime,
-     maxCircuit: int = MaxCircuit,
-     maxCircuitPerPeer: int = MaxCircuitPerPeer,
-     msgSize: int = RelayClientMsgSize,
-     circuitRelayV1: bool = false): T =
-
-  let cl = T(canHop: canHop,
-             reservationTTL: reservationTTL,
-             limit: Limit(duration: limitDuration, data: limitData),
-             heartbeatSleepTime: heartbeatSleepTime,
-             maxCircuit: maxCircuit,
-             maxCircuitPerPeer: maxCircuitPerPeer,
-             msgSize: msgSize,
-             isCircuitRelayV1: circuitRelayV1)
-  proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
+proc new*(
+    T: typedesc[RelayClient],
+    canHop: bool = false,
+    reservationTTL: times.Duration = DefaultReservationTTL,
+    limitDuration: uint32 = DefaultLimitDuration,
+    limitData: uint64 = DefaultLimitData,
+    heartbeatSleepTime: uint32 = DefaultHeartbeatSleepTime,
+    maxCircuit: int = MaxCircuit,
+    maxCircuitPerPeer: int = MaxCircuitPerPeer,
+    msgSize: int = RelayClientMsgSize,
+    circuitRelayV1: bool = false,
+): T =
+  let cl = T(
+    canHop: canHop,
+    reservationTTL: reservationTTL,
+    limit: Limit(duration: limitDuration, data: limitData),
+    heartbeatSleepTime: heartbeatSleepTime,
+    maxCircuit: maxCircuit,
+    maxCircuitPerPeer: maxCircuitPerPeer,
+    msgSize: msgSize,
+    isCircuitRelayV1: circuitRelayV1,
+  )
+  proc handleStream(conn: Connection, proto: string) {.async.} =
     try:
-      case proto:
-      of RelayV1Codec: await cl.handleStreamV1(conn)
-      of RelayV2StopCodec: await cl.handleStopStreamV2(conn)
-      of RelayV2HopCodec: await cl.handleHopStreamV2(conn)
+      case proto
+      of RelayV1Codec:
+        await cl.handleStreamV1(conn)
+      of RelayV2StopCodec:
+        await cl.handleStopStreamV2(conn)
+      of RelayV2HopCodec:
+        await cl.handleHopStreamV2(conn)
     except CancelledError as exc:
       raise exc
     except CatchableError as exc:
@@ -288,8 +308,9 @@ proc new*(T: typedesc[RelayClient], canHop: bool = false,
       await conn.close()
 
   cl.handler = handleStream
-  cl.codecs = if cl.canHop:
-                @[RelayV1Codec, RelayV2HopCodec, RelayV2StopCodec]
-              else:
-                @[RelayV1Codec, RelayV2StopCodec]
+  cl.codecs =
+    if cl.canHop:
+      @[RelayV1Codec, RelayV2HopCodec, RelayV2StopCodec]
+    else:
+      @[RelayV1Codec, RelayV2StopCodec]
   cl

libp2p/protocols/connectivity/relay/messages.nim

@@ -7,15 +7,11 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import options, macros, sequtils
-import stew/objects
-import ../../../peerinfo,
-       ../../../signed_envelope
+import macros
+import stew/[objects, results]
+import ../../../peerinfo, ../../../signed_envelope
 
 # Circuit Relay V1 Message
 
@@ -49,36 +45,36 @@ type
     addrs*: seq[MultiAddress]
 
   RelayMessage* = object
-    msgType*: Option[RelayType]
-    srcPeer*: Option[RelayPeer]
-    dstPeer*: Option[RelayPeer]
-    status*: Option[StatusV1]
+    msgType*: Opt[RelayType]
+    srcPeer*: Opt[RelayPeer]
+    dstPeer*: Opt[RelayPeer]
+    status*: Opt[StatusV1]
 
 proc encode*(msg: RelayMessage): ProtoBuffer =
   result = initProtoBuffer()
 
-  if isSome(msg.msgType):
-    result.write(1, msg.msgType.get().ord.uint)
-  if isSome(msg.srcPeer):
+  msg.msgType.withValue(typ):
+    result.write(1, typ.ord.uint)
+  msg.srcPeer.withValue(srcPeer):
     var peer = initProtoBuffer()
-    peer.write(1, msg.srcPeer.get().peerId)
-    for ma in msg.srcPeer.get().addrs:
+    peer.write(1, srcPeer.peerId)
+    for ma in srcPeer.addrs:
       peer.write(2, ma.data.buffer)
     peer.finish()
     result.write(2, peer.buffer)
-  if isSome(msg.dstPeer):
+  msg.dstPeer.withValue(dstPeer):
     var peer = initProtoBuffer()
-    peer.write(1, msg.dstPeer.get().peerId)
-    for ma in msg.dstPeer.get().addrs:
+    peer.write(1, dstPeer.peerId)
+    for ma in dstPeer.addrs:
       peer.write(2, ma.data.buffer)
     peer.finish()
     result.write(3, peer.buffer)
-  if isSome(msg.status):
-    result.write(4, msg.status.get().ord.uint)
+  msg.status.withValue(status):
+    result.write(4, status.ord.uint)
 
   result.finish()
 
-proc decode*(_: typedesc[RelayMessage], buf: seq[byte]): Option[RelayMessage] =
+proc decode*(_: typedesc[RelayMessage], buf: seq[byte]): Opt[RelayMessage] =
   var
     rMsg: RelayMessage
     msgTypeOrd: uint32
@@ -88,53 +84,44 @@ proc decode*(_: typedesc[RelayMessage], buf: seq[byte]): Option[RelayMessage] =
     pbSrc: ProtoBuffer
     pbDst: ProtoBuffer
 
-  let
-    pb = initProtoBuffer(buf)
-    r1 = pb.getField(1, msgTypeOrd)
-    r2 = pb.getField(2, pbSrc)
-    r3 = pb.getField(3, pbDst)
-    r4 = pb.getField(4, statusOrd)
+  let pb = initProtoBuffer(buf)
 
-  if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr():
-    return none(RelayMessage)
-
-  if r2.get() and
-     (pbSrc.getField(1, src.peerId).isErr() or
-      pbSrc.getRepeatedField(2, src.addrs).isErr()):
-    return none(RelayMessage)
-
-  if r3.get() and
-     (pbDst.getField(1, dst.peerId).isErr() or
-      pbDst.getRepeatedField(2, dst.addrs).isErr()):
-    return none(RelayMessage)
-
-  if r1.get():
+  if ?pb.getField(1, msgTypeOrd).toOpt():
     if msgTypeOrd.int notin RelayType:
-      return none(RelayMessage)
-    rMsg.msgType = some(RelayType(msgTypeOrd))
-  if r2.get(): rMsg.srcPeer = some(src)
-  if r3.get(): rMsg.dstPeer = some(dst)
-  if r4.get():
-    if statusOrd.int notin StatusV1:
-      return none(RelayMessage)
-    rMsg.status = some(StatusV1(statusOrd))
-  some(rMsg)
+      return Opt.none(RelayMessage)
+    rMsg.msgType = Opt.some(RelayType(msgTypeOrd))
+
+  if ?pb.getField(2, pbSrc).toOpt():
+    discard ?pbSrc.getField(1, src.peerId).toOpt()
+    discard ?pbSrc.getRepeatedField(2, src.addrs).toOpt()
+    rMsg.srcPeer = Opt.some(src)
+
+  if ?pb.getField(3, pbDst).toOpt():
+    discard ?pbDst.getField(1, dst.peerId).toOpt()
+    discard ?pbDst.getRepeatedField(2, dst.addrs).toOpt()
+    rMsg.dstPeer = Opt.some(dst)
+
+  if ?pb.getField(4, statusOrd).toOpt():
+    var status: StatusV1
+    if not checkedEnumAssign(status, statusOrd):
+      return Opt.none(RelayMessage)
+    rMsg.status = Opt.some(status)
+  Opt.some(rMsg)
 
 # Voucher
 
-type
-  Voucher* = object
-    relayPeerId*: PeerId     # peer ID of the relay
-    reservingPeerId*: PeerId # peer ID of the reserving peer
-    expiration*: uint64      # UNIX UTC expiration time for the reservation
+type Voucher* = object
+  relayPeerId*: PeerId # peer ID of the relay
+  reservingPeerId*: PeerId # peer ID of the reserving peer
+  expiration*: uint64 # UNIX UTC expiration time for the reservation
 
 proc decode*(_: typedesc[Voucher], buf: seq[byte]): Result[Voucher, ProtoError] =
   let pb = initProtoBuffer(buf)
   var v = Voucher()
 
-  ? pb.getRequiredField(1, v.relayPeerId)
-  ? pb.getRequiredField(2, v.reservingPeerId)
-  ? pb.getRequiredField(3, v.expiration)
+  ?pb.getRequiredField(1, v.relayPeerId)
+  ?pb.getRequiredField(2, v.reservingPeerId)
+  ?pb.getRequiredField(3, v.expiration)
 
   ok(v)
 
@@ -148,20 +135,23 @@ proc encode*(v: Voucher): seq[byte] =
   pb.finish()
   pb.buffer
 
-proc init*(T: typedesc[Voucher],
-          relayPeerId: PeerId,
-          reservingPeerId: PeerId,
-          expiration: uint64): T =
+proc init*(
+    T: typedesc[Voucher],
+    relayPeerId: PeerId,
+    reservingPeerId: PeerId,
+    expiration: uint64,
+): T =
   T(
-    relayPeerId = relayPeerId,
-    reservingPeerId = reservingPeerId,
-    expiration: expiration
+    relayPeerId = relayPeerId, reservingPeerId = reservingPeerId, expiration: expiration
   )
 
 type SignedVoucher* = SignedPayload[Voucher]
 
-proc payloadDomain*(_: typedesc[Voucher]): string = "libp2p-relay-rsvp"
-proc payloadType*(_: typedesc[Voucher]): seq[byte] = @[ (byte)0x03, (byte)0x02 ]
+proc payloadDomain*(_: typedesc[Voucher]): string =
+  "libp2p-relay-rsvp"
+
+proc payloadType*(_: typedesc[Voucher]): seq[byte] =
+  @[(byte) 0x03, (byte) 0x02]
 
 proc checkValid*(spr: SignedVoucher): Result[void, EnvelopeError] =
   if not spr.data.relayPeerId.match(spr.envelope.publicKey):
@@ -175,13 +165,15 @@ type
   Peer* = object
     peerId*: PeerId
     addrs*: seq[MultiAddress]
+
   Reservation* = object
-    expire*: uint64              # required, Unix expiration time (UTC)
-    addrs*: seq[MultiAddress]    # relay address for reserving peer
-    svoucher*: Option[seq[byte]] # optional, reservation voucher
+    expire*: uint64 # required, Unix expiration time (UTC)
+    addrs*: seq[MultiAddress] # relay address for reserving peer
+    svoucher*: Opt[seq[byte]] # optional, reservation voucher
+
   Limit* = object
-    duration*: uint32            # seconds
-    data*: uint64                # bytes
+    duration*: uint32 # seconds
+    data*: uint64 # bytes
 
   StatusV2* = enum
     Ok = 100
@@ -192,103 +184,92 @@ type
     NoReservation = 204
     MalformedMessage = 400
     UnexpectedMessage = 401
+
   HopMessageType* {.pure.} = enum
     Reserve = 0
     Connect = 1
     Status = 2
+
   HopMessage* = object
     msgType*: HopMessageType
-    peer*: Option[Peer]
-    reservation*: Option[Reservation]
+    peer*: Opt[Peer]
+    reservation*: Opt[Reservation]
     limit*: Limit
-    status*: Option[StatusV2]
+    status*: Opt[StatusV2]
 
 proc encode*(msg: HopMessage): ProtoBuffer =
   var pb = initProtoBuffer()
 
   pb.write(1, msg.msgType.ord.uint)
-  if msg.peer.isSome():
+  msg.peer.withValue(peer):
     var ppb = initProtoBuffer()
-    ppb.write(1, msg.peer.get().peerId)
-    for ma in msg.peer.get().addrs:
+    ppb.write(1, peer.peerId)
+    for ma in peer.addrs:
       ppb.write(2, ma.data.buffer)
     ppb.finish()
     pb.write(2, ppb.buffer)
-  if msg.reservation.isSome():
-    let rsrv = msg.reservation.get()
+  msg.reservation.withValue(rsrv):
     var rpb = initProtoBuffer()
     rpb.write(1, rsrv.expire)
     for ma in rsrv.addrs:
       rpb.write(2, ma.data.buffer)
-    if rsrv.svoucher.isSome():
-      rpb.write(3, rsrv.svoucher.get())
+    rsrv.svoucher.withValue(vouch):
+      rpb.write(3, vouch)
     rpb.finish()
     pb.write(3, rpb.buffer)
   if msg.limit.duration > 0 or msg.limit.data > 0:
     var lpb = initProtoBuffer()
-    if msg.limit.duration > 0: lpb.write(1, msg.limit.duration)
-    if msg.limit.data > 0: lpb.write(2, msg.limit.data)
+    if msg.limit.duration > 0:
+      lpb.write(1, msg.limit.duration)
+    if msg.limit.data > 0:
+      lpb.write(2, msg.limit.data)
     lpb.finish()
     pb.write(4, lpb.buffer)
-  if msg.status.isSome():
-    pb.write(5, msg.status.get().ord.uint)
+  msg.status.withValue(status):
+    pb.write(5, status.ord.uint)
 
   pb.finish()
   pb
 
-proc decode*(_: typedesc[HopMessage], buf: seq[byte]): Option[HopMessage] =
-  var
-    msg: HopMessage
-    msgTypeOrd: uint32
-    pbPeer: ProtoBuffer
-    pbReservation: ProtoBuffer
-    pbLimit: ProtoBuffer
-    statusOrd: uint32
-    peer: Peer
-    reservation: Reservation
-    limit: Limit
-    res: bool
-
-  let
-    pb = initProtoBuffer(buf)
-    r1 = pb.getRequiredField(1, msgTypeOrd)
-    r2 = pb.getField(2, pbPeer)
-    r3 = pb.getField(3, pbReservation)
-    r4 = pb.getField(4, pbLimit)
-    r5 = pb.getField(5, statusOrd)
-
-  if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr() or r5.isErr():
-    return none(HopMessage)
-
-  if r2.get() and
-     (pbPeer.getRequiredField(1, peer.peerId).isErr() or
-      pbPeer.getRepeatedField(2, peer.addrs).isErr()):
-    return none(HopMessage)
-
-  if r3.get():
-    var svoucher: seq[byte]
-    let rSVoucher = pbReservation.getField(3, svoucher)
-    if pbReservation.getRequiredField(1, reservation.expire).isErr() or
-       pbReservation.getRepeatedField(2, reservation.addrs).isErr() or
-       rSVoucher.isErr():
-      return none(HopMessage)
-    if rSVoucher.get(): reservation.svoucher = some(svoucher)
-
-  if r4.get() and
-     (pbLimit.getField(1, limit.duration).isErr() or
-      pbLimit.getField(2, limit.data).isErr()):
-    return none(HopMessage)
+proc decode*(_: typedesc[HopMessage], buf: seq[byte]): Opt[HopMessage] =
+  var msg: HopMessage
+  let pb = initProtoBuffer(buf)
 
+  var msgTypeOrd: uint32
+  ?pb.getRequiredField(1, msgTypeOrd).toOpt()
   if not checkedEnumAssign(msg.msgType, msgTypeOrd):
-    return none(HopMessage)
-  if r2.get(): msg.peer = some(peer)
-  if r3.get(): msg.reservation = some(reservation)
-  if r4.get(): msg.limit = limit
-  if r5.get():
-    if statusOrd.int notin StatusV2:
-      return none(HopMessage)
-    msg.status = some(StatusV2(statusOrd))
-  some(msg)
+    return Opt.none(HopMessage)
+
+  var pbPeer: ProtoBuffer
+  if ?pb.getField(2, pbPeer).toOpt():
+    var peer: Peer
+    ?pbPeer.getRequiredField(1, peer.peerId).toOpt()
+    discard ?pbPeer.getRepeatedField(2, peer.addrs).toOpt()
+    msg.peer = Opt.some(peer)
+
+  var pbReservation: ProtoBuffer
+  if ?pb.getField(3, pbReservation).toOpt():
+    var
+      svoucher: seq[byte]
+      reservation: Reservation
+    if ?pbReservation.getField(3, svoucher).toOpt():
+      reservation.svoucher = Opt.some(svoucher)
+    ?pbReservation.getRequiredField(1, reservation.expire).toOpt()
+    discard ?pbReservation.getRepeatedField(2, reservation.addrs).toOpt()
+    msg.reservation = Opt.some(reservation)
+
+  var pbLimit: ProtoBuffer
+  if ?pb.getField(4, pbLimit).toOpt():
+    discard ?pbLimit.getField(1, msg.limit.duration).toOpt()
+    discard ?pbLimit.getField(2, msg.limit.data).toOpt()
+
+  var statusOrd: uint32
+  if ?pb.getField(5, statusOrd).toOpt():
+    var status: StatusV2
+    if not checkedEnumAssign(status, statusOrd):
+      return Opt.none(HopMessage)
+    msg.status = Opt.some(status)
+  Opt.some(msg)
 
 # Circuit Relay V2 Stop Message
 
@@ -296,75 +277,65 @@ type
   StopMessageType* {.pure.} = enum
     Connect = 0
     Status = 1
+
   StopMessage* = object
     msgType*: StopMessageType
-    peer*: Option[Peer]
+    peer*: Opt[Peer]
     limit*: Limit
-    status*: Option[StatusV2]
-
+    status*: Opt[StatusV2]
 
 proc encode*(msg: StopMessage): ProtoBuffer =
   var pb = initProtoBuffer()
 
   pb.write(1, msg.msgType.ord.uint)
-  if msg.peer.isSome():
+  msg.peer.withValue(peer):
     var ppb = initProtoBuffer()
-    ppb.write(1, msg.peer.get().peerId)
-    for ma in msg.peer.get().addrs:
+    ppb.write(1, peer.peerId)
+    for ma in peer.addrs:
       ppb.write(2, ma.data.buffer)
     ppb.finish()
     pb.write(2, ppb.buffer)
   if msg.limit.duration > 0 or msg.limit.data > 0:
     var lpb = initProtoBuffer()
-    if msg.limit.duration > 0: lpb.write(1, msg.limit.duration)
-    if msg.limit.data > 0: lpb.write(2, msg.limit.data)
+    if msg.limit.duration > 0:
+      lpb.write(1, msg.limit.duration)
+    if msg.limit.data > 0:
+      lpb.write(2, msg.limit.data)
     lpb.finish()
     pb.write(3, lpb.buffer)
-  if msg.status.isSome():
-    pb.write(4, msg.status.get().ord.uint)
+  msg.status.withValue(status):
+    pb.write(4, status.ord.uint)
 
   pb.finish()
   pb
 
-proc decode*(_: typedesc[StopMessage], buf: seq[byte]): Option[StopMessage] =
-  var
-    msg: StopMessage
-    msgTypeOrd: uint32
-    pbPeer: ProtoBuffer
-    pbLimit: ProtoBuffer
-    statusOrd: uint32
-    peer: Peer
-    limit: Limit
-    rVoucher: ProtoResult[bool]
-    res: bool
+proc decode*(_: typedesc[StopMessage], buf: seq[byte]): Opt[StopMessage] =
+  var msg: StopMessage
 
-  let
-    pb = initProtoBuffer(buf)
-    r1 = pb.getRequiredField(1, msgTypeOrd)
-    r2 = pb.getField(2, pbPeer)
-    r3 = pb.getField(3, pbLimit)
-    r4 = pb.getField(4, statusOrd)
+  let pb = initProtoBuffer(buf)
 
-  if r1.isErr() or r2.isErr() or r3.isErr() or r4.isErr():
-    return none(StopMessage)
-
-  if r2.get() and
-     (pbPeer.getRequiredField(1, peer.peerId).isErr() or
-      pbPeer.getRepeatedField(2, peer.addrs).isErr()):
-    return none(StopMessage)
-
-  if r3.get() and
-     (pbLimit.getField(1, limit.duration).isErr() or
-      pbLimit.getField(2, limit.data).isErr()):
-    return none(StopMessage)
-
-  if msgTypeOrd.int notin StopMessageType.low.ord .. StopMessageType.high.ord:
-    return none(StopMessage)
+  var msgTypeOrd: uint32
+  ?pb.getRequiredField(1, msgTypeOrd).toOpt()
+  if msgTypeOrd.int notin StopMessageType:
+    return Opt.none(StopMessage)
   msg.msgType = StopMessageType(msgTypeOrd)
-  if r2.get(): msg.peer = some(peer)
-  if r3.get(): msg.limit = limit
-  if r4.get():
-    if statusOrd.int notin StatusV2:
-      return none(StopMessage)
-    msg.status = some(StatusV2(statusOrd))
-  some(msg)
+
+  var pbPeer: ProtoBuffer
+  if ?pb.getField(2, pbPeer).toOpt():
+    var peer: Peer
+    ?pbPeer.getRequiredField(1, peer.peerId).toOpt()
+    discard ?pbPeer.getRepeatedField(2, peer.addrs).toOpt()
+    msg.peer = Opt.some(peer)
+
+  var pbLimit: ProtoBuffer
+  if ?pb.getField(3, pbLimit).toOpt():
+    discard ?pbLimit.getField(1, msg.limit.duration).toOpt()
+    discard ?pbLimit.getField(2, msg.limit.data).toOpt()
+
+  var statusOrd: uint32
+  if ?pb.getField(4, statusOrd).toOpt():
+    var status: StatusV2
+    if not checkedEnumAssign(status, statusOrd):
+      return Opt.none(StopMessage)
+    msg.status = Opt.some(status)
+  Opt.some(msg)

libp2p/protocols/connectivity/relay/rconn.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,30 +7,27 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import chronos
 
 import ../../../stream/connection
 
-type
-  RelayConnection* = ref object of Connection
-    conn*: Connection
-    limitDuration*: uint32
-    limitData*: uint64
-    dataSent*: uint64
+type RelayConnection* = ref object of Connection
+  conn*: Connection
+  limitDuration*: uint32
+  limitData*: uint64
+  dataSent*: uint64
 
 method readOnce*(
-    self: RelayConnection,
-    pbytes: pointer,
-    nbytes: int): Future[int] {.async.} =
+    self: RelayConnection, pbytes: pointer, nbytes: int
+): Future[int] {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   self.activity = true
-  return await self.conn.readOnce(pbytes, nbytes)
+  self.conn.readOnce(pbytes, nbytes)
 
-method write*(self: RelayConnection, msg: seq[byte]): Future[void] {.async.} =
+method write*(
+    self: RelayConnection, msg: seq[byte]
+): Future[void] {.async: (raises: [CancelledError, LPStreamError]).} =
   self.dataSent.inc(msg.len)
   if self.limitData != 0 and self.dataSent > self.limitData:
     await self.close()
@@ -38,24 +35,28 @@ method write*(self: RelayConnection, msg: seq[byte]): Future[void] {.async.} =
   self.activity = true
   await self.conn.write(msg)
 
-method closeImpl*(self: RelayConnection): Future[void] {.async.} =
+method closeImpl*(self: RelayConnection): Future[void] {.async: (raises: []).} =
   await self.conn.close()
   await procCall Connection(self).closeImpl()
 
-method getWrapped*(self: RelayConnection): Connection = self.conn
+method getWrapped*(self: RelayConnection): Connection =
+  self.conn
 
 proc new*(
-  T: typedesc[RelayConnection],
-  conn: Connection,
-  limitDuration: uint32,
-  limitData: uint64): T =
+    T: typedesc[RelayConnection],
+    conn: Connection,
+    limitDuration: uint32,
+    limitData: uint64,
+): T =
   let rc = T(conn: conn, limitDuration: limitDuration, limitData: limitData)
+  rc.dir = conn.dir
   rc.initStream()
   if limitDuration > 0:
-    proc checkDurationConnection() {.async.} =
-      let sleep = sleepAsync(limitDuration.seconds())
-      await sleep or conn.join()
-      if sleep.finished: await conn.close()
-      else: sleep.cancel()
+    proc checkDurationConnection() {.async: (raises: []).} =
+      try:
+        await noCancel conn.join().wait(limitDuration.seconds())
+      except AsyncTimeoutError:
+        await conn.close()
+
     asyncSpawn checkDurationConnection()
   return rc

libp2p/protocols/connectivity/relay/relay.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,28 +7,25 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import options, sequtils, tables, sugar
+import sequtils, tables
 
 import chronos, chronicles
 
-import ./messages,
-       ./rconn,
-       ./utils,
-       ../../../peerinfo,
-       ../../../switch,
-       ../../../multiaddress,
-       ../../../multicodec,
-       ../../../stream/connection,
-       ../../../protocols/protocol,
-       ../../../transports/transport,
-       ../../../errors,
-       ../../../utils/heartbeat,
-       ../../../signed_envelope
+import
+  ./messages,
+  ./rconn,
+  ./utils,
+  ../../../peerinfo,
+  ../../../switch,
+  ../../../multiaddress,
+  ../../../multicodec,
+  ../../../stream/connection,
+  ../../../protocols/protocol,
+  ../../../errors,
+  ../../../utils/heartbeat,
+  ../../../signed_envelope
 
 # TODO:
 # * Eventually replace std/times by chronos/timer. Currently chronos/timer
@@ -58,50 +55,56 @@ type
 
 # Relay Side
 
-type
-  Relay* = ref object of LPProtocol
-    switch*: Switch
-    peerCount: CountTable[PeerId]
+type Relay* = ref object of LPProtocol
+  switch*: Switch
+  peerCount: CountTable[PeerId]
 
-    # number of reservation (relayv2) + number of connection (relayv1)
-    maxCircuit*: int
+  # number of reservation (relayv2) + number of connection (relayv1)
+  maxCircuit*: int
 
-    maxCircuitPerPeer*: int
-    msgSize*: int
-    # RelayV1
-    isCircuitRelayV1*: bool
-    streamCount: int
-    # RelayV2
-    rsvp: Table[PeerId, DateTime]
-    reservationLoop: Future[void]
-    reservationTTL*: times.Duration
-    heartbeatSleepTime*: uint32
-    limit*: Limit
+  maxCircuitPerPeer*: int
+  msgSize*: int
+  # RelayV1
+  isCircuitRelayV1*: bool
+  streamCount: int
+  # RelayV2
+  rsvp: Table[PeerId, DateTime]
+  reservationLoop: Future[void]
+  reservationTTL*: times.Duration
+  heartbeatSleepTime*: uint32
+  limit*: Limit
 
 # Relay V2
 
 proc createReserveResponse(
-    r: Relay,
-    pid: PeerId,
-    expire: DateTime): Result[HopMessage, CryptoError] =
+    r: Relay, pid: PeerId, expire: DateTime
+): Result[HopMessage, CryptoError] =
   let
     expireUnix = expire.toTime.toUnix.uint64
-    v = Voucher(relayPeerId: r.switch.peerInfo.peerId,
-                  reservingPeerId: pid,
-                  expiration: expireUnix)
-    sv = ? SignedVoucher.init(r.switch.peerInfo.privateKey, v)
-    ma = ? MultiAddress.init("/p2p/" & $r.switch.peerInfo.peerId).orErr(CryptoError.KeyError)
-    rsrv = Reservation(expire: expireUnix,
-                       addrs: r.switch.peerInfo.addrs.mapIt(
-                         ? it.concat(ma).orErr(CryptoError.KeyError)),
-                       svoucher: some(? sv.encode))
-    msg = HopMessage(msgType: HopMessageType.Status,
-                     reservation: some(rsrv),
-                     limit: r.limit,
-                     status: some(Ok))
+    v = Voucher(
+      relayPeerId: r.switch.peerInfo.peerId,
+      reservingPeerId: pid,
+      expiration: expireUnix,
+    )
+    sv = ?SignedVoucher.init(r.switch.peerInfo.privateKey, v)
+    ma =
+      ?MultiAddress.init("/p2p/" & $r.switch.peerInfo.peerId).orErr(
+        CryptoError.KeyError
+      )
+    rsrv = Reservation(
+      expire: expireUnix,
+      addrs: r.switch.peerInfo.addrs.mapIt(?it.concat(ma).orErr(CryptoError.KeyError)),
+      svoucher: Opt.some(?sv.encode),
+    )
+    msg = HopMessage(
+      msgType: HopMessageType.Status,
+      reservation: Opt.some(rsrv),
+      limit: r.limit,
+      status: Opt.some(Ok),
+    )
   return ok(msg)
 
-proc isRelayed(conn: Connection): bool =
+proc isRelayed*(conn: Connection): bool =
   var wrappedConn = conn
   while not isNil(wrappedConn):
     if wrappedConn of RelayConnection:
@@ -109,7 +112,7 @@ proc isRelayed(conn: Connection): bool =
     wrappedConn = wrappedConn.getWrapped()
   return false
 
-proc handleReserve(r: Relay, conn: Connection) {.async, gcsafe.} =
+proc handleReserve(r: Relay, conn: Connection) {.async.} =
   if conn.isRelayed():
     trace "reservation attempt over relay connection", pid = conn.peerId
     await sendHopStatus(conn, PermissionDenied)
@@ -119,32 +122,28 @@ proc handleReserve(r: Relay, conn: Connection) {.async, gcsafe.} =
     trace "Too many reservations", pid = conn.peerId
     await sendHopStatus(conn, ReservationRefused)
     return
+  trace "reserving relay slot for", pid = conn.peerId
   let
     pid = conn.peerId
     expire = now().utc + r.reservationTTL
-    msg = r.createReserveResponse(pid, expire)
+    msg = r.createReserveResponse(pid, expire).valueOr:
+      trace "error signing the voucher", pid
+      return
 
-  trace "reserving relay slot for", pid
-  if msg.isErr():
-    trace "error signing the voucher", error = error(msg), pid
-    return
   r.rsvp[pid] = expire
-  await conn.writeLp(encode(msg.get()).buffer)
+  await conn.writeLp(encode(msg).buffer)
 
-proc handleConnect(r: Relay,
-                   connSrc: Connection,
-                   msg: HopMessage) {.async, gcsafe.} =
+proc handleConnect(r: Relay, connSrc: Connection, msg: HopMessage) {.async.} =
   if connSrc.isRelayed():
     trace "connection attempt over relay connection"
     await sendHopStatus(connSrc, PermissionDenied)
     return
-  if msg.peer.isNone():
-    await sendHopStatus(connSrc, MalformedMessage)
-    return
-
   let
+    msgPeer = msg.peer.valueOr:
+      await sendHopStatus(connSrc, MalformedMessage)
+      return
     src = connSrc.peerId
-    dst = msg.peer.get().peerId
+    dst = msgPeer.peerId
   if dst notin r.rsvp:
     trace "refusing connection, no reservation", src, dst
     await sendHopStatus(connSrc, NoReservation)
@@ -156,37 +155,42 @@ proc handleConnect(r: Relay,
     r.peerCount.inc(src, -1)
     r.peerCount.inc(dst, -1)
 
-  if r.peerCount[src] > r.maxCircuitPerPeer or
-     r.peerCount[dst] > r.maxCircuitPerPeer:
-    trace "too many connections", src = r.peerCount[src],
-                                  dst = r.peerCount[dst],
-                                  max = r.maxCircuitPerPeer
+  if r.peerCount[src] > r.maxCircuitPerPeer or r.peerCount[dst] > r.maxCircuitPerPeer:
+    trace "too many connections",
+      src = r.peerCount[src], dst = r.peerCount[dst], max = r.maxCircuitPerPeer
     await sendHopStatus(connSrc, ResourceLimitExceeded)
     return
 
-  let connDst = try:
-    await r.switch.dial(dst, RelayV2StopCodec)
-  except CancelledError as exc:
-    raise exc
-  except CatchableError as exc:
-    trace "error opening relay stream", dst, exc=exc.msg
-    await sendHopStatus(connSrc, ConnectionFailed)
-    return
+  let connDst =
+    try:
+      await r.switch.dial(dst, RelayV2StopCodec)
+    except CancelledError as exc:
+      raise exc
+    except CatchableError as exc:
+      trace "error opening relay stream", dst, exc = exc.msg
+      await sendHopStatus(connSrc, ConnectionFailed)
+      return
   defer:
     await connDst.close()
 
   proc sendStopMsg() {.async.} =
-    let stopMsg = StopMessage(msgType: StopMessageType.Connect,
-                            peer: some(Peer(peerId: src, addrs: @[])),
-                            limit: r.limit)
+    let stopMsg = StopMessage(
+      msgType: StopMessageType.Connect,
+      peer: Opt.some(Peer(peerId: src, addrs: @[])),
+      limit: r.limit,
+    )
     await connDst.writeLp(encode(stopMsg).buffer)
-    let msg = StopMessage.decode(await connDst.readLp(r.msgSize)).get()
+    let msg = StopMessage.decode(await connDst.readLp(r.msgSize)).valueOr:
+      raise newException(SendStopError, "Malformed message")
     if msg.msgType != StopMessageType.Status:
-      raise newException(SendStopError, "Unexpected stop response, not a status message")
+      raise
+        newException(SendStopError, "Unexpected stop response, not a status message")
     if msg.status.get(UnexpectedMessage) != Ok:
       raise newException(SendStopError, "Relay stop failure")
-    await connSrc.writeLp(encode(HopMessage(msgType: HopMessageType.Status,
-                                          status: some(Ok))).buffer)
+    await connSrc.writeLp(
+      encode(HopMessage(msgType: HopMessageType.Status, status: Opt.some(Ok))).buffer
+    )
+
   try:
     await sendStopMsg()
   except CancelledError as exc:
@@ -205,55 +209,54 @@ proc handleConnect(r: Relay,
     await rconnDst.close()
   await bridge(rconnSrc, rconnDst)
 
-proc handleHopStreamV2*(r: Relay, conn: Connection) {.async, gcsafe.} =
-  let msgOpt = HopMessage.decode(await conn.readLp(r.msgSize))
-  if msgOpt.isNone():
+proc handleHopStreamV2*(r: Relay, conn: Connection) {.async.} =
+  let msg = HopMessage.decode(await conn.readLp(r.msgSize)).valueOr:
     await sendHopStatus(conn, MalformedMessage)
     return
-  trace "relayv2 handle stream", msg = msgOpt.get()
-  let msg = msgOpt.get()
-  case msg.msgType:
-  of HopMessageType.Reserve: await r.handleReserve(conn)
-  of HopMessageType.Connect: await r.handleConnect(conn, msg)
+  trace "relayv2 handle stream", msg = msg
+  case msg.msgType
+  of HopMessageType.Reserve:
+    await r.handleReserve(conn)
+  of HopMessageType.Connect:
+    await r.handleConnect(conn, msg)
   else:
-    trace "Unexpected relayv2 handshake", msgType=msg.msgType
+    trace "Unexpected relayv2 handshake", msgType = msg.msgType
     await sendHopStatus(conn, MalformedMessage)
 
 # Relay V1
 
-proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsafe.} =
+proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async.} =
   r.streamCount.inc()
-  defer: r.streamCount.dec()
+  defer:
+    r.streamCount.dec()
   if r.streamCount + r.rsvp.len() >= r.maxCircuit:
-    trace "refusing connection; too many active circuit", streamCount = r.streamCount, rsvp = r.rsvp.len()
+    trace "refusing connection; too many active circuit",
+      streamCount = r.streamCount, rsvp = r.rsvp.len()
     await sendStatus(connSrc, StatusV1.HopCantSpeakRelay)
     return
 
+  var src, dst: RelayPeer
   proc checkMsg(): Result[RelayMessage, StatusV1] =
-    if msg.srcPeer.isNone:
+    src = msg.srcPeer.valueOr:
       return err(StatusV1.HopSrcMultiaddrInvalid)
-    let src = msg.srcPeer.get()
     if src.peerId != connSrc.peerId:
       return err(StatusV1.HopSrcMultiaddrInvalid)
-    if msg.dstPeer.isNone:
+    dst = msg.dstPeer.valueOr:
       return err(StatusV1.HopDstMultiaddrInvalid)
-    let dst = msg.dstPeer.get()
     if dst.peerId == r.switch.peerInfo.peerId:
       return err(StatusV1.HopCantRelayToSelf)
     if not r.switch.isConnected(dst.peerId):
       trace "relay not connected to dst", dst
       return err(StatusV1.HopNoConnToDst)
     ok(msg)
+
   let check = checkMsg()
   if check.isErr:
     await sendStatus(connSrc, check.error())
     return
 
-  let
-    src = msg.srcPeer.get()
-    dst = msg.dstPeer.get()
   if r.peerCount[src.peerId] >= r.maxCircuitPerPeer or
-     r.peerCount[dst.peerId] >= r.maxCircuitPerPeer:
+      r.peerCount[dst.peerId] >= r.maxCircuitPerPeer:
     trace "refusing connection; too many connection from src or to dst", src, dst
     await sendStatus(connSrc, StatusV1.HopCantSpeakRelay)
     return
@@ -263,40 +266,40 @@ proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsaf
     r.peerCount.inc(src.peerId, -1)
     r.peerCount.inc(dst.peerId, -1)
 
-  let connDst = try:
-    await r.switch.dial(dst.peerId, RelayV1Codec)
-  except CancelledError as exc:
-    raise exc
-  except CatchableError as exc:
-    trace "error opening relay stream", dst, exc=exc.msg
-    await sendStatus(connSrc, StatusV1.HopCantDialDst)
-    return
+  let connDst =
+    try:
+      await r.switch.dial(dst.peerId, RelayV1Codec)
+    except CancelledError as exc:
+      raise exc
+    except CatchableError as exc:
+      trace "error opening relay stream", dst, exc = exc.msg
+      await sendStatus(connSrc, StatusV1.HopCantDialDst)
+      return
   defer:
     await connDst.close()
 
   let msgToSend = RelayMessage(
-    msgType: some(RelayType.Stop),
-    srcPeer: some(src),
-    dstPeer: some(dst))
+    msgType: Opt.some(RelayType.Stop), srcPeer: Opt.some(src), dstPeer: Opt.some(dst)
+  )
 
-  let msgRcvFromDstOpt = try:
-    await connDst.writeLp(encode(msgToSend).buffer)
-    RelayMessage.decode(await connDst.readLp(r.msgSize))
-  except CancelledError as exc:
-    raise exc
-  except CatchableError as exc:
-    trace "error writing stop handshake or reading stop response", exc=exc.msg
-    await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
-    return
+  let msgRcvFromDstOpt =
+    try:
+      await connDst.writeLp(encode(msgToSend).buffer)
+      RelayMessage.decode(await connDst.readLp(r.msgSize))
+    except CancelledError as exc:
+      raise exc
+    except CatchableError as exc:
+      trace "error writing stop handshake or reading stop response", exc = exc.msg
+      await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
+      return
 
-  if msgRcvFromDstOpt.isNone:
+  let msgRcvFromDst = msgRcvFromDstOpt.valueOr:
     trace "error reading stop response", msg = msgRcvFromDstOpt
     await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
     return
 
-  let msgRcvFromDst = msgRcvFromDstOpt.get()
   if msgRcvFromDst.msgType.get(RelayType.Stop) != RelayType.Status or
-     msgRcvFromDst.status.get(StatusV1.StopRelayRefused) != StatusV1.Success:
+      msgRcvFromDst.status.get(StatusV1.StopRelayRefused) != StatusV1.Success:
     trace "unexcepted relay stop response", msgRcvFromDst
     await sendStatus(connSrc, StatusV1.HopCantOpenDstStream)
     return
@@ -305,51 +308,64 @@ proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsaf
   trace "relaying connection", src, dst
   await bridge(connSrc, connDst)
 
-proc handleStreamV1(r: Relay, conn: Connection) {.async, gcsafe.} =
-  let msgOpt = RelayMessage.decode(await conn.readLp(r.msgSize))
-  if msgOpt.isNone:
+proc handleStreamV1(r: Relay, conn: Connection) {.async.} =
+  let msg = RelayMessage.decode(await conn.readLp(r.msgSize)).valueOr:
     await sendStatus(conn, StatusV1.MalformedMessage)
     return
-  trace "relay handle stream", msg = msgOpt.get()
-  let msg = msgOpt.get()
-  case msg.msgType.get:
-    of RelayType.Hop: await r.handleHop(conn, msg)
-    of RelayType.Stop: await sendStatus(conn, StatusV1.StopRelayRefused)
-    of RelayType.CanHop: await sendStatus(conn, StatusV1.Success)
-    else:
-      trace "Unexpected relay handshake", msgType=msg.msgType
-      await sendStatus(conn, StatusV1.MalformedMessage)
+  trace "relay handle stream", msg
+
+  let typ = msg.msgType.valueOr:
+    trace "Message type not set"
+    await sendStatus(conn, StatusV1.MalformedMessage)
+    return
+  case typ
+  of RelayType.Hop:
+    await r.handleHop(conn, msg)
+  of RelayType.Stop:
+    await sendStatus(conn, StatusV1.StopRelayRefused)
+  of RelayType.CanHop:
+    await sendStatus(conn, StatusV1.Success)
+  else:
+    trace "Unexpected relay handshake", msgType = msg.msgType
+    await sendStatus(conn, StatusV1.MalformedMessage)
 
 proc setup*(r: Relay, switch: Switch) =
   r.switch = switch
   r.switch.addPeerEventHandler(
-    proc (peerId: PeerId, event: PeerEvent) {.async.} =
-      r.rsvp.del(peerId),
-    Left)
+    proc(peerId: PeerId, event: PeerEvent) {.async.} =
+      r.rsvp.del(peerId)
+    ,
+    Left,
+  )
 
-proc new*(T: typedesc[Relay],
-     reservationTTL: times.Duration = DefaultReservationTTL,
-     limitDuration: uint32 = DefaultLimitDuration,
-     limitData: uint64 = DefaultLimitData,
-     heartbeatSleepTime: uint32 = DefaultHeartbeatSleepTime,
-     maxCircuit: int = MaxCircuit,
-     maxCircuitPerPeer: int = MaxCircuitPerPeer,
-     msgSize: int = RelayMsgSize,
-     circuitRelayV1: bool = false): T =
+proc new*(
+    T: typedesc[Relay],
+    reservationTTL: times.Duration = DefaultReservationTTL,
+    limitDuration: uint32 = DefaultLimitDuration,
+    limitData: uint64 = DefaultLimitData,
+    heartbeatSleepTime: uint32 = DefaultHeartbeatSleepTime,
+    maxCircuit: int = MaxCircuit,
+    maxCircuitPerPeer: int = MaxCircuitPerPeer,
+    msgSize: int = RelayMsgSize,
+    circuitRelayV1: bool = false,
+): T =
+  let r = T(
+    reservationTTL: reservationTTL,
+    limit: Limit(duration: limitDuration, data: limitData),
+    heartbeatSleepTime: heartbeatSleepTime,
+    maxCircuit: maxCircuit,
+    maxCircuitPerPeer: maxCircuitPerPeer,
+    msgSize: msgSize,
+    isCircuitRelayV1: circuitRelayV1,
+  )
 
-  let r = T(reservationTTL: reservationTTL,
-            limit: Limit(duration: limitDuration, data: limitData),
-            heartbeatSleepTime: heartbeatSleepTime,
-            maxCircuit: maxCircuit,
-            maxCircuitPerPeer: maxCircuitPerPeer,
-            msgSize: msgSize,
-            isCircuitRelayV1: circuitRelayV1)
-
-  proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
+  proc handleStream(conn: Connection, proto: string) {.async.} =
     try:
-      case proto:
-      of RelayV2HopCodec: await r.handleHopStreamV2(conn)
-      of RelayV1Codec: await r.handleStreamV1(conn)
+      case proto
+      of RelayV2HopCodec:
+        await r.handleHopStreamV2(conn)
+      of RelayV1Codec:
+        await r.handleStreamV1(conn)
     except CancelledError as exc:
       raise exc
     except CatchableError as exc:
@@ -358,8 +374,11 @@ proc new*(T: typedesc[Relay],
       trace "exiting relayv2 handler", conn
       await conn.close()
 
-  r.codecs = if r.isCircuitRelayV1: @[RelayV1Codec]
-             else: @[RelayV2HopCodec, RelayV1Codec]
+  r.codecs =
+    if r.isCircuitRelayV1:
+      @[RelayV1Codec]
+    else:
+      @[RelayV2HopCodec, RelayV1Codec]
   r.handler = handleStream
   r
 
@@ -370,17 +389,23 @@ proc deletesReservation(r: Relay) {.async.} =
       if n > r.rsvp[k]:
         r.rsvp.del(k)
 
-method start*(r: Relay) {.async.} =
+method start*(r: Relay): Future[void] {.async: (raises: [CancelledError], raw: true).} =
+  let fut = newFuture[void]()
+  fut.complete()
   if not r.reservationLoop.isNil:
     warn "Starting relay twice"
-    return
+    return fut
   r.reservationLoop = r.deletesReservation()
   r.started = true
+  fut
 
-method stop*(r: Relay) {.async.} =
+method stop*(r: Relay): Future[void] {.async: (raises: [], raw: true).} =
+  let fut = newFuture[void]()
+  fut.complete()
   if r.reservationLoop.isNil:
     warn "Stopping relay without starting it"
-    return
+    return fut
   r.started = false
   r.reservationLoop.cancel()
   r.reservationLoop = nil
+  fut

libp2p/protocols/connectivity/relay/rtransport.nim

@@ -7,30 +7,27 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import sequtils, strutils
 
 import chronos, chronicles
 
-import ./client,
-       ./rconn,
-       ./utils,
-       ../../../switch,
-       ../../../stream/connection,
-       ../../../transports/transport
+import
+  ./client,
+  ./rconn,
+  ./utils,
+  ../../../switch,
+  ../../../stream/connection,
+  ../../../transports/transport
 
 logScope:
   topics = "libp2p relay relay-transport"
 
-type
-  RelayTransport* = ref object of Transport
-    client*: RelayClient
-    queue: AsyncQueue[Connection]
-    selfRunning: bool
+type RelayTransport* = ref object of Transport
+  client*: RelayClient
+  queue: AsyncQueue[Connection]
+  selfRunning: bool
 
 method start*(self: RelayTransport, ma: seq[MultiAddress]) {.async.} =
   if self.selfRunning:
@@ -38,46 +35,44 @@ method start*(self: RelayTransport, ma: seq[MultiAddress]) {.async.} =
     return
 
   self.client.onNewConnection = proc(
-    conn: Connection,
-    duration: uint32 = 0,
-    data: uint64 = 0) {.async, gcsafe, raises: [Defect].} =
-      await self.queue.addLast(RelayConnection.new(conn, duration, data))
-      await conn.join()
+      conn: Connection, duration: uint32 = 0, data: uint64 = 0
+  ) {.async.} =
+    await self.queue.addLast(RelayConnection.new(conn, duration, data))
+    await conn.join()
   self.selfRunning = true
   await procCall Transport(self).start(ma)
   trace "Starting Relay transport"
 
-method stop*(self: RelayTransport) {.async, gcsafe.} =
+method stop*(self: RelayTransport) {.async.} =
   self.running = false
   self.selfRunning = false
   self.client.onNewConnection = nil
   while not self.queue.empty():
     await self.queue.popFirstNoWait().close()
 
-method accept*(self: RelayTransport): Future[Connection] {.async, gcsafe.} =
+method accept*(self: RelayTransport): Future[Connection] {.async.} =
   result = await self.queue.popFirst()
 
-proc dial*(self: RelayTransport, ma: MultiAddress): Future[Connection] {.async, gcsafe.} =
+proc dial*(self: RelayTransport, ma: MultiAddress): Future[Connection] {.async.} =
   let
     sma = toSeq(ma.items())
-    relayAddrs = sma[0..sma.len-4].mapIt(it.tryGet()).foldl(a & b)
+    relayAddrs = sma[0 .. sma.len - 4].mapIt(it.tryGet()).foldl(a & b)
   var
     relayPeerId: PeerId
     dstPeerId: PeerId
-  if not relayPeerId.init(($(sma[^3].get())).split('/')[2]):
+  if not relayPeerId.init(($(sma[^3].tryGet())).split('/')[2]):
     raise newException(RelayV2DialError, "Relay doesn't exist")
-  if not dstPeerId.init(($(sma[^1].get())).split('/')[2]):
+  if not dstPeerId.init(($(sma[^1].tryGet())).split('/')[2]):
     raise newException(RelayV2DialError, "Destination doesn't exist")
   trace "Dial", relayPeerId, dstPeerId
 
   let conn = await self.client.switch.dial(
-    relayPeerId,
-    @[ relayAddrs ],
-    @[ RelayV2HopCodec, RelayV1Codec ])
+    relayPeerId, @[relayAddrs], @[RelayV2HopCodec, RelayV1Codec]
+  )
   conn.dir = Direction.Out
   var rc: RelayConnection
   try:
-    case conn.protocol:
+    case conn.protocol
     of RelayV1Codec:
       return await self.client.dialPeerV1(conn, dstPeerId, @[])
     of RelayV2HopCodec:
@@ -86,21 +81,27 @@ proc dial*(self: RelayTransport, ma: MultiAddress): Future[Connection] {.async,
   except CancelledError as exc:
     raise exc
   except CatchableError as exc:
-    if not rc.isNil: await rc.close()
+    if not rc.isNil:
+      await rc.close()
     raise exc
 
 method dial*(
-  self: RelayTransport,
-  hostname: string,
-  ma: MultiAddress,
-  peerId: Opt[PeerId] = Opt.none(PeerId)): Future[Connection] {.async, gcsafe.} =
-  let address = MultiAddress.init($ma & "/p2p/" & $peerId.get()).tryGet()
-  result = await self.dial(address)
+    self: RelayTransport,
+    hostname: string,
+    ma: MultiAddress,
+    peerId: Opt[PeerId] = Opt.none(PeerId),
+): Future[Connection] {.async.} =
+  peerId.withValue(pid):
+    let address = MultiAddress.init($ma & "/p2p/" & $pid).tryGet()
+    result = await self.dial(address)
 
-method handles*(self: RelayTransport, ma: MultiAddress): bool {.gcsafe} =
-  if ma.protocols.isOk():
-    let sma = toSeq(ma.items())
-    result = sma.len >= 2 and CircuitRelay.match(sma[^1].get())
+method handles*(self: RelayTransport, ma: MultiAddress): bool {.gcsafe.} =
+  try:
+    if ma.protocols.isOk():
+      let sma = toSeq(ma.items())
+      result = sma.len >= 2 and CircuitRelay.match(sma[^1].tryGet())
+  except CatchableError as exc:
+    result = false
   trace "Handles return", ma, result
 
 proc new*(T: typedesc[RelayTransport], cl: RelayClient, upgrader: Upgrade): T =

libp2p/protocols/connectivity/relay/utils.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,17 +7,10 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
-
-import options
+{.push raises: [].}
 
 import chronos, chronicles
-
-import ./messages,
-       ../../../stream/connection
+import ./messages, ../../../stream/connection
 
 logScope:
   topics = "libp2p relay relay-utils"
@@ -27,63 +20,74 @@ const
   RelayV2HopCodec* = "/libp2p/circuit/relay/0.2.0/hop"
   RelayV2StopCodec* = "/libp2p/circuit/relay/0.2.0/stop"
 
-proc sendStatus*(conn: Connection, code: StatusV1) {.async, gcsafe.} =
+proc sendStatus*(
+    conn: Connection, code: StatusV1
+) {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   trace "send relay/v1 status", status = $code & "(" & $ord(code) & ")"
   let
-    msg = RelayMessage(msgType: some(RelayType.Status), status: some(code))
+    msg = RelayMessage(msgType: Opt.some(RelayType.Status), status: Opt.some(code))
     pb = encode(msg)
-  await conn.writeLp(pb.buffer)
+  conn.writeLp(pb.buffer)
 
-proc sendHopStatus*(conn: Connection, code: StatusV2) {.async, gcsafe.} =
+proc sendHopStatus*(
+    conn: Connection, code: StatusV2
+) {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   trace "send hop relay/v2 status", status = $code & "(" & $ord(code) & ")"
   let
-    msg = HopMessage(msgType: HopMessageType.Status, status: some(code))
+    msg = HopMessage(msgType: HopMessageType.Status, status: Opt.some(code))
     pb = encode(msg)
-  await conn.writeLp(pb.buffer)
+  conn.writeLp(pb.buffer)
 
-proc sendStopStatus*(conn: Connection, code: StatusV2) {.async.} =
+proc sendStopStatus*(
+    conn: Connection, code: StatusV2
+) {.async: (raises: [CancelledError, LPStreamError], raw: true).} =
   trace "send stop relay/v2 status", status = $code & " (" & $ord(code) & ")"
   let
-    msg = StopMessage(msgType: StopMessageType.Status, status: some(code))
+    msg = StopMessage(msgType: StopMessageType.Status, status: Opt.some(code))
     pb = encode(msg)
-  await conn.writeLp(pb.buffer)
+  conn.writeLp(pb.buffer)
 
-proc bridge*(connSrc: Connection, connDst: Connection) {.async.} =
+proc bridge*(
+    connSrc: Connection, connDst: Connection
+) {.async: (raises: [CancelledError]).} =
   const bufferSize = 4096
   var
     bufSrcToDst: array[bufferSize, byte]
     bufDstToSrc: array[bufferSize, byte]
-    futSrc = connSrc.readOnce(addr bufSrcToDst[0], bufSrcToDst.high + 1)
-    futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.high + 1)
-    bytesSendFromSrcToDst = 0
-    bytesSendFromDstToSrc = 0
+    futSrc = connSrc.readOnce(addr bufSrcToDst[0], bufSrcToDst.len)
+    futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.len)
+    bytesSentFromSrcToDst = 0
+    bytesSentFromDstToSrc = 0
     bufRead: int
 
   try:
     while not connSrc.closed() and not connDst.closed():
-      await futSrc or futDst
+      try: # https://github.com/status-im/nim-chronos/issues/516
+        discard await race(futSrc, futDst)
+      except ValueError:
+        raiseAssert("Futures list is not empty")
       if futSrc.finished():
         bufRead = await futSrc
         if bufRead > 0:
-          bytesSendFromSrcToDst.inc(bufRead)
-          await connDst.write(@bufSrcToDst[0..<bufRead])
-          zeroMem(addr(bufSrcToDst), bufSrcToDst.high + 1)
-        futSrc = connSrc.readOnce(addr bufSrcToDst[0], bufSrcToDst.high + 1)
+          bytesSentFromSrcToDst.inc(bufRead)
+          await connDst.write(@bufSrcToDst[0 ..< bufRead])
+          zeroMem(addr bufSrcToDst[0], bufSrcToDst.len)
+        futSrc = connSrc.readOnce(addr bufSrcToDst[0], bufSrcToDst.len)
       if futDst.finished():
         bufRead = await futDst
         if bufRead > 0:
-          bytesSendFromDstToSrc += bufRead
-          await connSrc.write(bufDstToSrc[0..<bufRead])
-          zeroMem(addr(bufDstToSrc), bufDstToSrc.high + 1)
-        futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.high + 1)
+          bytesSentFromDstToSrc += bufRead
+          await connSrc.write(bufDstToSrc[0 ..< bufRead])
+          zeroMem(addr bufDstToSrc[0], bufDstToSrc.len)
+        futDst = connDst.readOnce(addr bufDstToSrc[0], bufDstToSrc.len)
   except CancelledError as exc:
     raise exc
-  except CatchableError as exc:
+  except LPStreamError as exc:
     if connSrc.closed() or connSrc.atEof():
       trace "relay src closed connection", src = connSrc.peerId
     if connDst.closed() or connDst.atEof():
       trace "relay dst closed connection", dst = connDst.peerId
-    trace "relay error", exc=exc.msg
-  trace "end relaying", bytesSendFromSrcToDst, bytesSendFromDstToSrc
+    trace "relay error", exc = exc.msg
+  trace "end relaying", bytesSentFromSrcToDst, bytesSentFromDstToSrc
   await futSrc.cancelAndWait()
   await futDst.cancelAndWait()

libp2p/protocols/identify.nim

@@ -10,23 +10,25 @@
 ## `Identify <https://docs.libp2p.io/concepts/protocols/#identify>`_ and
 ## `Push Identify <https://docs.libp2p.io/concepts/protocols/#identify-push>`_ implementation
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[sequtils, options, strutils, sugar]
 import stew/results
 import chronos, chronicles
-import ../protobuf/minprotobuf,
-       ../peerinfo,
-       ../stream/connection,
-       ../peerid,
-       ../crypto/crypto,
-       ../multiaddress,
-       ../protocols/protocol,
-       ../utility,
-       ../errors
+import
+  ../protobuf/minprotobuf,
+  ../peerinfo,
+  ../stream/connection,
+  ../peerid,
+  ../crypto/crypto,
+  ../multiaddress,
+  ../multicodec,
+  ../protocols/protocol,
+  ../utility,
+  ../errors,
+  ../observedaddrmanager
+
+export observedaddrmanager
 
 logScope:
   topics = "libp2p identify"
@@ -56,12 +58,11 @@ type
   Identify* = ref object of LPProtocol
     peerInfo*: PeerInfo
     sendSignedPeerRecord*: bool
+    observedAddrManager*: ObservedAddrManager
 
-  IdentifyPushHandler* = proc (
-    peer: PeerId,
-    newInfo: IdentifyInfo):
-    Future[void]
-    {.gcsafe, raises: [Defect], public.}
+  IdentifyPushHandler* = proc(peer: PeerId, newInfo: IdentifyInfo): Future[void] {.
+    gcsafe, raises: [], public
+  .}
 
   IdentifyPush* = ref object of LPProtocol
     identifyHandler: IdentifyPushHandler
@@ -70,48 +71,43 @@ chronicles.expandIt(IdentifyInfo):
   pubkey = ($it.pubkey).shortLog
   addresses = it.addrs.map(x => $x).join(",")
   protocols = it.protos.map(x => $x).join(",")
-  observable_address =
-    if it.observedAddr.isSome(): $it.observedAddr.get()
-    else: "None"
+  observable_address = $it.observedAddr
   proto_version = it.protoVersion.get("None")
   agent_version = it.agentVersion.get("None")
   signedPeerRecord =
     # The SPR contains the same data as the identify message
     # would be cumbersome to log
-    if iinfo.signedPeerRecord.isSome(): "Some"
-    else: "None"
+    if it.signedPeerRecord.isSome(): "Some" else: "None"
 
-proc encodeMsg(peerInfo: PeerInfo, observedAddr: Opt[MultiAddress], sendSpr: bool): ProtoBuffer
-  {.raises: [Defect].} =
+proc encodeMsg(
+    peerInfo: PeerInfo, observedAddr: Opt[MultiAddress], sendSpr: bool
+): ProtoBuffer {.raises: [].} =
   result = initProtoBuffer()
 
   let pkey = peerInfo.publicKey
 
-  result.write(1, pkey.getBytes().get())
+  result.write(1, pkey.getBytes().expect("valid key"))
   for ma in peerInfo.addrs:
     result.write(2, ma.data.buffer)
   for proto in peerInfo.protocols:
     result.write(3, proto)
-  if observedAddr.isSome:
-    result.write(4, observedAddr.get().data.buffer)
+  observedAddr.withValue(observed):
+    result.write(4, observed.data.buffer)
   let protoVersion = ProtoVersion
   result.write(5, protoVersion)
-  let agentVersion = if peerInfo.agentVersion.len <= 0:
-    AgentVersion
-  else:
-    peerInfo.agentVersion
+  let agentVersion =
+    if peerInfo.agentVersion.len <= 0: AgentVersion else: peerInfo.agentVersion
   result.write(6, agentVersion)
 
   ## Optionally populate signedPeerRecord field.
   ## See https://github.com/libp2p/go-libp2p/blob/ddf96ce1cfa9e19564feb9bd3e8269958bbc0aba/p2p/protocol/identify/pb/identify.proto for reference.
   if sendSpr:
-    let sprBuff = peerInfo.signedPeerRecord.envelope.encode()
-    if sprBuff.isOk():
-      result.write(8, sprBuff.get())
+    peerInfo.signedPeerRecord.envelope.encode().toOpt().withValue(sprBuff):
+      result.write(8, sprBuff)
 
   result.finish()
 
-proc decodeMsg*(buf: seq[byte]): Option[IdentifyInfo] =
+proc decodeMsg*(buf: seq[byte]): Opt[IdentifyInfo] =
   var
     iinfo: IdentifyInfo
     pubkey: PublicKey
@@ -121,52 +117,38 @@ proc decodeMsg*(buf: seq[byte]): Option[IdentifyInfo] =
     signedPeerRecord: SignedPeerRecord
 
   var pb = initProtoBuffer(buf)
+  if ?pb.getField(1, pubkey).toOpt():
+    iinfo.pubkey = some(pubkey)
+    if ?pb.getField(8, signedPeerRecord).toOpt() and
+        pubkey == signedPeerRecord.envelope.publicKey:
+      iinfo.signedPeerRecord = some(signedPeerRecord.envelope)
+  discard ?pb.getRepeatedField(2, iinfo.addrs).toOpt()
+  discard ?pb.getRepeatedField(3, iinfo.protos).toOpt()
+  if ?pb.getField(4, oaddr).toOpt():
+    iinfo.observedAddr = some(oaddr)
+  if ?pb.getField(5, protoVersion).toOpt():
+    iinfo.protoVersion = some(protoVersion)
+  if ?pb.getField(6, agentVersion).toOpt():
+    iinfo.agentVersion = some(agentVersion)
 
-  let r1 = pb.getField(1, pubkey)
-  let r2 = pb.getRepeatedField(2, iinfo.addrs)
-  let r3 = pb.getRepeatedField(3, iinfo.protos)
-  let r4 = pb.getField(4, oaddr)
-  let r5 = pb.getField(5, protoVersion)
-  let r6 = pb.getField(6, agentVersion)
-
-  let r8 = pb.getField(8, signedPeerRecord)
-
-  let res = r1.isOk() and r2.isOk() and r3.isOk() and
-            r4.isOk() and r5.isOk() and r6.isOk() and
-            r8.isOk()
-
-  if res:
-    if r1.get():
-      iinfo.pubkey = some(pubkey)
-    if r4.get():
-      iinfo.observedAddr = some(oaddr)
-    if r5.get():
-      iinfo.protoVersion = some(protoVersion)
-    if r6.get():
-      iinfo.agentVersion = some(agentVersion)
-    if r8.get() and r1.get():
-      if iinfo.pubkey.get() == signedPeerRecord.envelope.publicKey:
-        iinfo.signedPeerRecord = some(signedPeerRecord.envelope)
-    debug "decodeMsg: decoded identify", iinfo
-    some(iinfo)
-  else:
-    trace "decodeMsg: failed to decode received message"
-    none[IdentifyInfo]()
+  Opt.some(iinfo)
 
 proc new*(
-  T: typedesc[Identify],
-  peerInfo: PeerInfo,
-  sendSignedPeerRecord = false
-  ): T =
+    T: typedesc[Identify],
+    peerInfo: PeerInfo,
+    sendSignedPeerRecord = false,
+    observedAddrManager = ObservedAddrManager.new(),
+): T =
   let identify = T(
     peerInfo: peerInfo,
-    sendSignedPeerRecord: sendSignedPeerRecord
+    sendSignedPeerRecord: sendSignedPeerRecord,
+    observedAddrManager: observedAddrManager,
   )
   identify.init()
   identify
 
 method init*(p: Identify) =
-  proc handle(conn: Connection, proto: string) {.async, gcsafe, closure.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     try:
       trace "handling identify request", conn
       var pb = encodeMsg(p.peerInfo, conn.observedAddr, p.sendSignedPeerRecord)
@@ -182,34 +164,38 @@ method init*(p: Identify) =
   p.handler = handle
   p.codec = IdentifyCodec
 
-proc identify*(p: Identify,
-               conn: Connection,
-               remotePeerId: PeerId): Future[IdentifyInfo] {.async, gcsafe.} =
+proc identify*(
+    self: Identify, conn: Connection, remotePeerId: PeerId
+): Future[IdentifyInfo] {.async.} =
   trace "initiating identify", conn
-  var message = await conn.readLp(64*1024)
+  var message = await conn.readLp(64 * 1024)
   if len(message) == 0:
     trace "identify: Empty message received!", conn
     raise newException(IdentityInvalidMsgError, "Empty message received!")
 
-  let infoOpt = decodeMsg(message)
-  if infoOpt.isNone():
+  var info = decodeMsg(message).valueOr:
     raise newException(IdentityInvalidMsgError, "Incorrect message received!")
-  result = infoOpt.get()
+  debug "identify: decoded message", conn, info
+  let
+    pubkey = info.pubkey.valueOr:
+      raise newException(IdentityInvalidMsgError, "No pubkey in identify")
+    peer = PeerId.init(pubkey).valueOr:
+      raise newException(IdentityInvalidMsgError, $error)
 
-  if result.pubkey.isSome:
-    let peer = PeerId.init(result.pubkey.get())
-    if peer.isErr:
-      raise newException(IdentityInvalidMsgError, $peer.error)
-    else:
-      result.peerId = peer.get()
-      if peer.get() != remotePeerId:
-        trace "Peer ids don't match",
-              remote = peer,
-              local = remotePeerId
+  if peer != remotePeerId:
+    trace "Peer ids don't match", remote = peer, local = remotePeerId
+    raise newException(IdentityNoMatchError, "Peer ids don't match")
+  info.peerId = peer
 
-        raise newException(IdentityNoMatchError, "Peer ids don't match")
-  else:
-    raise newException(IdentityInvalidMsgError, "No pubkey in identify")
+  info.observedAddr.withValue(observed):
+    # Currently, we use the ObservedAddrManager only to find our dialable external NAT address. Therefore, addresses
+    # like "...\p2p-circuit\p2p\..." and "\p2p\..." are not useful to us.
+    if observed.contains(multiCodec("p2p-circuit")).get(false) or
+        P2PPattern.matchPartial(observed):
+      trace "Not adding address to ObservedAddrManager.", observed
+    elif not self.observedAddrManager.addObservation(observed):
+      trace "Observed address is not valid.", observedAddr = observed
+  return info
 
 proc new*(T: typedesc[IdentifyPush], handler: IdentifyPushHandler = nil): T {.public.} =
   ## Create a IdentifyPush protocol. `handler` will be called every time
@@ -219,26 +205,24 @@ proc new*(T: typedesc[IdentifyPush], handler: IdentifyPushHandler = nil): T {.pu
   identifypush
 
 proc init*(p: IdentifyPush) =
-  proc handle(conn: Connection, proto: string) {.async, gcsafe, closure.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     trace "handling identify push", conn
     try:
-      var message = await conn.readLp(64*1024)
+      var message = await conn.readLp(64 * 1024)
 
-      let infoOpt = decodeMsg(message)
-      if infoOpt.isNone():
+      var identInfo = decodeMsg(message).valueOr:
         raise newException(IdentityInvalidMsgError, "Incorrect message received!")
+      debug "identify push: decoded message", conn, identInfo
 
-      var indentInfo = infoOpt.get()
-
-      if indentInfo.pubkey.isSome:
-        let receivedPeerId = PeerId.init(indentInfo.pubkey.get()).tryGet()
+      identInfo.pubkey.withValue(pubkey):
+        let receivedPeerId = PeerId.init(pubkey).tryGet()
         if receivedPeerId != conn.peerId:
           raise newException(IdentityNoMatchError, "Peer ids don't match")
-        indentInfo.peerId = receivedPeerId
+        identInfo.peerId = receivedPeerId
 
       trace "triggering peer event", peerInfo = conn.peerId
       if not isNil(p.identifyHandler):
-        await p.identifyHandler(conn.peerId, indentInfo)
+        await p.identifyHandler(conn.peerId, identInfo)
     except CancelledError as exc:
       raise exc
     except CatchableError as exc:

libp2p/protocols/perf/client.nim

@@ -0,0 +1,50 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+## `Perf <https://github.com/libp2p/specs/blob/master/perf/perf.md>`_ protocol specification
+
+import chronos, chronicles, sequtils
+import stew/endians2
+import ./core, ../../stream/connection
+
+logScope:
+  topics = "libp2p perf"
+
+type PerfClient* = ref object of RootObj
+
+proc perf*(
+    _: typedesc[PerfClient],
+    conn: Connection,
+    sizeToWrite: uint64 = 0,
+    sizeToRead: uint64 = 0,
+): Future[Duration] {.async, public.} =
+  var
+    size = sizeToWrite
+    buf: array[PerfSize, byte]
+  let start = Moment.now()
+  trace "starting performance benchmark", conn, sizeToWrite, sizeToRead
+
+  await conn.write(toSeq(toBytesBE(sizeToRead)))
+  while size > 0:
+    let toWrite = min(size, PerfSize)
+    await conn.write(buf[0 ..< toWrite])
+    size -= toWrite
+
+  await conn.close()
+
+  size = sizeToRead
+
+  while size > 0:
+    let toRead = min(size, PerfSize)
+    await conn.readExactly(addr buf[0], toRead.int)
+    size = size - toRead
+
+  let duration = Moment.now() - start
+  trace "finishing performance benchmark", duration
+  return duration

libp2p/protocols/perf/core.nim

@@ -0,0 +1,14 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+## `Perf <https://github.com/libp2p/specs/blob/master/perf/perf.md>`_ protocol specification
+
+const
+  PerfCodec* = "/perf/1.0.0"
+  PerfSize* = 65536

libp2p/protocols/perf/server.nim

@@ -0,0 +1,57 @@
+# Nim-LibP2P
+# Copyright (c) 2023 Status Research & Development GmbH
+# Licensed under either of
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
+# at your option.
+# This file may not be copied, modified, or distributed except according to
+# those terms.
+
+## `Perf <https://github.com/libp2p/specs/blob/master/perf/perf.md>`_ protocol specification
+
+{.push raises: [].}
+
+import chronos, chronicles
+import stew/endians2
+import ./core, ../protocol, ../../stream/connection, ../../utility
+
+export chronicles, connection
+
+logScope:
+  topics = "libp2p perf"
+
+type Perf* = ref object of LPProtocol
+
+proc new*(T: typedesc[Perf]): T {.public.} =
+  var p = T()
+  proc handle(conn: Connection, proto: string) {.async.} =
+    var bytesRead = 0
+    try:
+      trace "Received benchmark performance check", conn
+      var
+        sizeBuffer: array[8, byte]
+        size: uint64
+      await conn.readExactly(addr sizeBuffer[0], 8)
+      size = uint64.fromBytesBE(sizeBuffer)
+
+      var toReadBuffer: array[PerfSize, byte]
+      try:
+        while true:
+          bytesRead += await conn.readOnce(addr toReadBuffer[0], PerfSize)
+      except CatchableError as exc:
+        discard
+
+      var buf: array[PerfSize, byte]
+      while size > 0:
+        let toWrite = min(size, PerfSize)
+        await conn.write(buf[0 ..< toWrite])
+        size -= toWrite
+    except CancelledError as exc:
+      raise exc
+    except CatchableError as exc:
+      trace "exception in perf handler", exc = exc.msg, conn
+    await conn.close()
+
+  p.handler = handle
+  p.codec = PerfCodec
+  return p

libp2p/protocols/ping.nim

@@ -9,22 +9,20 @@
 
 ## `Ping <https://docs.libp2p.io/concepts/protocols/#ping>`_ protocol implementation
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import chronos, chronicles
-import bearssl/[rand, hash]
-import ../protobuf/minprotobuf,
-       ../peerinfo,
-       ../stream/connection,
-       ../peerid,
-       ../crypto/crypto,
-       ../multiaddress,
-       ../protocols/protocol,
-       ../utility,
-       ../errors
+import bearssl/rand
+import
+  ../protobuf/minprotobuf,
+  ../peerinfo,
+  ../stream/connection,
+  ../peerid,
+  ../crypto/crypto,
+  ../multiaddress,
+  ../protocols/protocol,
+  ../utility,
+  ../errors
 
 export chronicles, rand, connection
 
@@ -39,27 +37,26 @@ type
   PingError* = object of LPError
   WrongPingAckError* = object of PingError
 
-  PingHandler* {.public.} = proc (
-    peer: PeerId):
-    Future[void]
-    {.gcsafe, raises: [Defect].}
+  PingHandler* {.public.} = proc(peer: PeerId): Future[void] {.gcsafe, raises: [].}
 
   Ping* = ref object of LPProtocol
     pingHandler*: PingHandler
     rng: ref HmacDrbgContext
 
-proc new*(T: typedesc[Ping], handler: PingHandler = nil, rng: ref HmacDrbgContext = newRng()): T {.public.} =
+proc new*(
+    T: typedesc[Ping], handler: PingHandler = nil, rng: ref HmacDrbgContext = newRng()
+): T {.public.} =
   let ping = Ping(pinghandler: handler, rng: rng)
   ping.init()
   ping
 
 method init*(p: Ping) =
-  proc handle(conn: Connection, proto: string) {.async, gcsafe, closure.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     try:
       trace "handling ping", conn
       var buf: array[PingSize, byte]
       await conn.readExactly(addr buf[0], PingSize)
-      trace "echoing ping", conn
+      trace "echoing ping", conn, pingData = @buf
       await conn.write(@buf)
       if not isNil(p.pingHandler):
         await p.pingHandler(conn.peerId)
@@ -71,10 +68,7 @@ method init*(p: Ping) =
   p.handler = handle
   p.codec = PingCodec
 
-proc ping*(
-  p: Ping,
-  conn: Connection,
-  ): Future[Duration] {.async, gcsafe, public.} =
+proc ping*(p: Ping, conn: Connection): Future[Duration] {.async, public.} =
   ## Sends ping to `conn`, returns the delay
 
   trace "initiating ping", conn
@@ -96,7 +90,7 @@ proc ping*(
 
   trace "got ping response", conn, responseDur
 
-  for i in 0..<randomBuf.len:
+  for i in 0 ..< randomBuf.len:
     if randomBuf[i] != resultBuf[i]:
       raise newException(WrongPingAckError, "Incorrect ping data from peer!")
 

libp2p/protocols/protocol.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -7,35 +7,38 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import chronos, stew/results
 import ../stream/connection
 
 export results
 
-const
-  DefaultMaxIncomingStreams* = 10
+const DefaultMaxIncomingStreams* = 10
 
 type
-  LPProtoHandler* = proc (
-    conn: Connection,
-    proto: string):
-    Future[void]
-    {.gcsafe, raises: [Defect].}
+  LPProtoHandler* = proc(conn: Connection, proto: string): Future[void] {.async.}
 
   LPProtocol* = ref object of RootObj
     codecs*: seq[string]
-    handler*: LPProtoHandler ## this handler gets invoked by the protocol negotiator
+    handlerImpl: LPProtoHandler ## invoked by the protocol negotiator
     started*: bool
     maxIncomingStreams: Opt[int]
 
-method init*(p: LPProtocol) {.base, gcsafe.} = discard
-method start*(p: LPProtocol) {.async, base.} = p.started = true
-method stop*(p: LPProtocol) {.async, base.} = p.started = false
+method init*(p: LPProtocol) {.base, gcsafe.} =
+  discard
+
+method start*(p: LPProtocol) {.async: (raises: [CancelledError], raw: true), base.} =
+  let fut = newFuture[void]()
+  fut.complete()
+  p.started = true
+  fut
+
+method stop*(p: LPProtocol) {.async: (raises: [], raw: true), base.} =
+  let fut = newFuture[void]()
+  fut.complete()
+  p.started = false
+  fut
 
 proc maxIncomingStreams*(p: LPProtocol): int =
   p.maxIncomingStreams.get(DefaultMaxIncomingStreams)
@@ -44,7 +47,7 @@ proc `maxIncomingStreams=`*(p: LPProtocol, val: int) =
   p.maxIncomingStreams = Opt.some(val)
 
 func codec*(p: LPProtocol): string =
-  assert(p.codecs.len > 0, "Codecs sequence was empty!")
+  doAssert(p.codecs.len > 0, "Codecs sequence was empty!")
   p.codecs[0]
 
 func `codec=`*(p: LPProtocol, codec: string) =
@@ -52,15 +55,54 @@ func `codec=`*(p: LPProtocol, codec: string) =
   # if we use this abstraction
   p.codecs.insert(codec, 0)
 
+template `handler`*(p: LPProtocol): LPProtoHandler =
+  p.handlerImpl
+
+template `handler`*(p: LPProtocol, conn: Connection, proto: string): Future[void] =
+  p.handlerImpl(conn, proto)
+
+func `handler=`*(p: LPProtocol, handler: LPProtoHandler) =
+  p.handlerImpl = handler
+
+# Callbacks that are annotated with `{.async: (raises).}` explicitly
+# document the types of errors that they may raise, but are not compatible
+# with `LPProtoHandler` and need to use a custom `proc` type.
+# They are internally wrapped into a `LPProtoHandler`, but still allow the
+# compiler to check that their `{.async: (raises).}` annotation is correct.
+# https://github.com/nim-lang/Nim/issues/23432
+func `handler=`*[E](
+    p: LPProtocol,
+    handler: proc(conn: Connection, proto: string): InternalRaisesFuture[void, E],
+) =
+  proc wrap(conn: Connection, proto: string): Future[void] {.async.} =
+    await handler(conn, proto)
+
+  p.handlerImpl = wrap
+
 proc new*(
-  T: type LPProtocol,
-  codecs: seq[string],
-  handler: LPProtoHandler,  # default(Opt[int]) or Opt.none(int) don't work on 1.2
-  maxIncomingStreams: Opt[int] | int = Opt[int]()): T =
+    T: type LPProtocol,
+    codecs: seq[string],
+    handler: LPProtoHandler,
+    maxIncomingStreams: Opt[int] | int = Opt.none(int),
+): T =
   T(
     codecs: codecs,
-    handler: handler,
+    handlerImpl: handler,
     maxIncomingStreams:
-      when maxIncomingStreams is int: Opt.some(maxIncomingStreams)
-      else: maxIncomingStreams
+      when maxIncomingStreams is int:
+        Opt.some(maxIncomingStreams)
+      else:
+        maxIncomingStreams
+    ,
   )
+
+proc new*[E](
+    T: type LPProtocol,
+    codecs: seq[string],
+    handler: proc(conn: Connection, proto: string): InternalRaisesFuture[void, E],
+    maxIncomingStreams: Opt[int] | int = Opt.none(int),
+): T =
+  proc wrap(conn: Connection, proto: string): Future[void] {.async.} =
+    await handler(conn, proto)
+
+  T.new(codec, wrap, maxIncomingStreams)

libp2p/protocols/pubsub/errors.nim

@@ -3,6 +3,7 @@
 
 import ../../utility
 
-type
-  ValidationResult* {.pure, public.} = enum
-    Accept, Reject, Ignore
+type ValidationResult* {.pure, public.} = enum
+  Accept
+  Reject
+  Ignore

libp2p/protocols/pubsub/floodsub.nim

@@ -7,23 +7,22 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[sequtils, sets, hashes, tables]
+import std/[sets, hashes, tables]
 import chronos, chronicles, metrics
-import ./pubsub,
-       ./pubsubpeer,
-       ./timedcache,
-       ./peertable,
-       ./rpc/[message, messages],
-       ../../crypto/crypto,
-       ../../stream/connection,
-       ../../peerid,
-       ../../peerinfo,
-       ../../utility
+import
+  ./pubsub,
+  ./pubsubpeer,
+  ./timedcache,
+  ./peertable,
+  ./rpc/[message, messages, protobuf],
+  nimcrypto/[hash, sha2],
+  ../../crypto/crypto,
+  ../../stream/connection,
+  ../../peerid,
+  ../../peerinfo,
+  ../../utility
 
 ## Simple flood-based publishing.
 
@@ -32,28 +31,33 @@ logScope:
 
 const FloodSubCodec* = "/floodsub/1.0.0"
 
-type
-  FloodSub* {.public.} = ref object of PubSub
-    floodsub*: PeerTable      # topic to remote peer map
-    seen*: TimedCache[MessageId] # message id:s already seen on the network
-    seenSalt*: seq[byte]
+type FloodSub* {.public.} = ref object of PubSub
+  floodsub*: PeerTable # topic to remote peer map
+  seen*: TimedCache[SaltedId]
+    # Early filter for messages recently observed on the network
+    # We use a salted id because the messages in this cache have not yet
+    # been validated meaning that an attacker has greater control over the
+    # hash key and therefore could poison the table
+  seenSalt*: sha256
+    # The salt in this case is a partially updated SHA256 context pre-seeded
+    # with some random data
 
-proc hasSeen*(f: FloodSub, msgId: MessageId): bool =
-  f.seenSalt & msgId in f.seen
+proc salt*(f: FloodSub, msgId: MessageId): SaltedId =
+  var tmp = f.seenSalt
+  tmp.update(msgId)
+  SaltedId(data: tmp.finish())
 
-proc addSeen*(f: FloodSub, msgId: MessageId): bool =
-  # Salting the seen hash helps avoid attacks against the hash function used
-  # in the nim hash table
+proc hasSeen*(f: FloodSub, saltedId: SaltedId): bool =
+  saltedId in f.seen
+
+proc addSeen*(f: FloodSub, saltedId: SaltedId): bool =
   # Return true if the message has already been seen
-  f.seen.put(f.seenSalt & msgId)
+  f.seen.put(saltedId)
 
-proc firstSeen*(f: FloodSub, msgId: MessageId): Moment =
-  f.seen.addedAt(f.seenSalt & msgId)
+proc firstSeen*(f: FloodSub, saltedId: SaltedId): Moment =
+  f.seen.addedAt(saltedId)
 
-proc handleSubscribe*(f: FloodSub,
-                      peer: PubSubPeer,
-                      topic: string,
-                      subscribe: bool) =
+proc handleSubscribe(f: FloodSub, peer: PubSubPeer, topic: string, subscribe: bool) =
   logScope:
     peer
     topic
@@ -66,7 +70,8 @@ proc handleSubscribe*(f: FloodSub,
     trace "ignoring unknown peer"
     return
 
-  if subscribe and not(isNil(f.subscriptionValidator)) and not(f.subscriptionValidator(topic)):
+  if subscribe and not (isNil(f.subscriptionValidator)) and
+      not (f.subscriptionValidator(topic)):
     # this is a violation, so warn should be in order
     warn "ignoring invalid topic subscription", topic, peer
     return
@@ -96,14 +101,22 @@ method unsubscribePeer*(f: FloodSub, peer: PeerId) =
 
   procCall PubSub(f).unsubscribePeer(peer)
 
-method rpcHandler*(f: FloodSub,
-                   peer: PubSubPeer,
-                   rpcMsg: RPCMsg) {.async.} =
-  for i in 0..<min(f.topicsHigh, rpcMsg.subscriptions.len):
-    template sub: untyped = rpcMsg.subscriptions[i]
+method rpcHandler*(f: FloodSub, peer: PubSubPeer, data: seq[byte]) {.async.} =
+  var rpcMsg = decodeRpcMsg(data).valueOr:
+    debug "failed to decode msg from peer", peer, err = error
+    raise newException(CatchableError, "Peer msg couldn't be decoded")
+
+  trace "decoded msg from peer", peer, msg = rpcMsg.shortLog
+  # trigger hooks
+  peer.recvObservers(rpcMsg)
+
+  for i in 0 ..< min(f.topicsHigh, rpcMsg.subscriptions.len):
+    template sub(): untyped =
+      rpcMsg.subscriptions[i]
+
     f.handleSubscribe(peer, sub.topic, sub.subscribe)
 
-  for msg in rpcMsg.messages:                         # for every message
+  for msg in rpcMsg.messages: # for every message
     let msgIdResult = f.msgIdProvider(msg)
     if msgIdResult.isErr:
       debug "Dropping message due to failed message id generation",
@@ -111,9 +124,11 @@ method rpcHandler*(f: FloodSub,
       # TODO: descore peers due to error during message validation (malicious?)
       continue
 
-    let msgId = msgIdResult.get
+    let
+      msgId = msgIdResult.get
+      saltedId = f.salt(msgId)
 
-    if f.addSeen(msgId):
+    if f.addSeen(saltedId):
       trace "Dropping already-seen message", msgId, peer
       continue
 
@@ -142,16 +157,19 @@ method rpcHandler*(f: FloodSub,
       discard
 
     var toSendPeers = initHashSet[PubSubPeer]()
-    for t in msg.topicIds:                     # for every topic in the message
-      if t notin f.topics:
-        continue
-      f.floodsub.withValue(t, peers): toSendPeers.incl(peers[])
+    let topic = msg.topic
+    if topic notin f.topics:
+      debug "Dropping message due to topic not in floodsub topics", topic, msgId, peer
+      continue
 
-      await handleData(f, t, msg.data)
+    f.floodsub.withValue(topic, peers):
+      toSendPeers.incl(peers[])
+
+    await handleData(f, topic, msg.data)
 
     # In theory, if topics are the same in all messages, we could batch - we'd
     # also have to be careful to only include validated messages
-    f.broadcast(toSendPeers, RPCMsg(messages: @[msg]))
+    f.broadcast(toSendPeers, RPCMsg(messages: @[msg]), isHighPriority = false)
     trace "Forwared message to peers", peers = toSendPeers.len
 
   f.updateMetrics(rpcMsg)
@@ -174,9 +192,7 @@ method init*(f: FloodSub) =
   f.handler = handler
   f.codec = FloodSubCodec
 
-method publish*(f: FloodSub,
-                topic: string,
-                data: seq[byte]): Future[int] {.async.} =
+method publish*(f: FloodSub, topic: string, data: seq[byte]): Future[int] {.async.} =
   # base returns always 0
   discard await procCall PubSub(f).publish(topic, data)
 
@@ -200,20 +216,18 @@ method publish*(f: FloodSub,
         inc f.msgSeqno
         Message.init(some(f.peerInfo), data, topic, some(f.msgSeqno), f.sign)
     msgId = f.msgIdProvider(msg).valueOr:
-      trace "Error generating message id, skipping publish",
-        error = error
+      trace "Error generating message id, skipping publish", error = error
       return 0
 
-  trace "Created new message",
-    msg = shortLog(msg), peers = peers.len, topic, msgId
+  trace "Created new message", msg = shortLog(msg), peers = peers.len, topic, msgId
 
-  if f.addSeen(msgId):
+  if f.addSeen(f.salt(msgId)):
     # custom msgid providers might cause this
     trace "Dropping already-seen message", msgId, topic
     return 0
 
   # Try to send to all peers that are known to be interested
-  f.broadcast(peers, RPCMsg(messages: @[msg]))
+  f.broadcast(peers, RPCMsg(messages: @[msg]), isHighPriority = true)
 
   when defined(libp2p_expensive_metrics):
     libp2p_pubsub_messages_published.inc(labelValues = [topic])
@@ -222,11 +236,13 @@ method publish*(f: FloodSub,
 
   return peers.len
 
-method initPubSub*(f: FloodSub)
-  {.raises: [Defect, InitializationError].} =
+method initPubSub*(f: FloodSub) {.raises: [InitializationError].} =
   procCall PubSub(f).initPubSub()
-  f.seen = TimedCache[MessageId].init(2.minutes)
-  f.seenSalt = newSeqUninitialized[byte](sizeof(Hash))
-  hmacDrbgGenerate(f.rng[], f.seenSalt)
+  f.seen = TimedCache[SaltedId].init(2.minutes)
+  f.seenSalt.init()
+
+  var tmp: array[32, byte]
+  hmacDrbgGenerate(f.rng[], tmp)
+  f.seenSalt.update(tmp)
 
   f.init()

libp2p/protocols/pubsub/gossipsub.nim

@@ -1,5 +1,5 @@
 # Nim-LibP2P
-# Copyright (c) 2023 Status Research & Development GmbH
+# Copyright (c) 2023-2024 Status Research & Development GmbH
 # Licensed under either of
 #  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
 #  * MIT license ([LICENSE-MIT](LICENSE-MIT))
@@ -9,26 +9,25 @@
 
 ## Gossip based publishing
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[tables, sets, options, sequtils]
+import std/[sets, sequtils]
 import chronos, chronicles, metrics
-import ./pubsub,
-       ./floodsub,
-       ./pubsubpeer,
-       ./peertable,
-       ./mcache,
-       ./timedcache,
-       ./rpc/[messages, message],
-       ../protocol,
-       ../../stream/connection,
-       ../../peerinfo,
-       ../../peerid,
-       ../../utility,
-       ../../switch
+import chronos/ratelimit
+import
+  ./pubsub,
+  ./floodsub,
+  ./pubsubpeer,
+  ./peertable,
+  ./mcache,
+  ./timedcache,
+  ./rpc/[messages, message, protobuf],
+  ../protocol,
+  ../../stream/connection,
+  ../../peerinfo,
+  ../../peerid,
+  ../../utility,
+  ../../switch
 
 import stew/results
 export results
@@ -41,49 +40,112 @@ logScope:
   topics = "libp2p gossipsub"
 
 declareCounter(libp2p_gossipsub_failed_publish, "number of failed publish")
-declareCounter(libp2p_gossipsub_invalid_topic_subscription, "number of invalid topic subscriptions that happened")
-declareCounter(libp2p_gossipsub_duplicate_during_validation, "number of duplicates received during message validation")
+declareCounter(
+  libp2p_gossipsub_invalid_topic_subscription,
+  "number of invalid topic subscriptions that happened",
+)
+declareCounter(
+  libp2p_gossipsub_duplicate_during_validation,
+  "number of duplicates received during message validation",
+)
+declareCounter(
+  libp2p_gossipsub_idontwant_saved_messages, "number of duplicates avoided by idontwant"
+)
+declareCounter(
+  libp2p_gossipsub_saved_bytes,
+  "bytes saved by gossipsub optimizations",
+  labels = ["kind"],
+)
 declareCounter(libp2p_gossipsub_duplicate, "number of duplicates received")
 declareCounter(libp2p_gossipsub_received, "number of messages received (deduplicated)")
 
-proc init*(_: type[GossipSubParams]): GossipSubParams =
+when defined(libp2p_expensive_metrics):
+  declareCounter(
+    libp2p_pubsub_received_messages,
+    "number of messages received",
+    labels = ["id", "topic"],
+  )
+
+proc init*(
+    _: type[GossipSubParams],
+    pruneBackoff = 1.minutes,
+    unsubscribeBackoff = 5.seconds,
+    floodPublish = true,
+    gossipFactor: float64 = 0.25,
+    d = GossipSubD,
+    dLow = GossipSubDlo,
+    dHigh = GossipSubDhi,
+    dScore = GossipSubDlo,
+    dOut = GossipSubDlo - 1, # DLow - 1
+    dLazy = GossipSubD, # Like D,
+    heartbeatInterval = GossipSubHeartbeatInterval,
+    historyLength = GossipSubHistoryLength,
+    historyGossip = GossipSubHistoryGossip,
+    fanoutTTL = GossipSubFanoutTTL,
+    seenTTL = 2.minutes,
+    gossipThreshold = -100.0,
+    publishThreshold = -1000.0,
+    graylistThreshold = -10000.0,
+    opportunisticGraftThreshold = 0.0,
+    decayInterval = 1.seconds,
+    decayToZero = 0.01,
+    retainScore = 2.minutes,
+    appSpecificWeight = 0.0,
+    ipColocationFactorWeight = 0.0,
+    ipColocationFactorThreshold = 1.0,
+    behaviourPenaltyWeight = -1.0,
+    behaviourPenaltyDecay = 0.999,
+    directPeers = initTable[PeerId, seq[MultiAddress]](),
+    disconnectBadPeers = false,
+    enablePX = false,
+    bandwidthEstimatebps = 100_000_000, # 100 Mbps or 12.5 MBps
+    overheadRateLimit = Opt.none(tuple[bytes: int, interval: Duration]),
+    disconnectPeerAboveRateLimit = false,
+    maxNumElementsInNonPriorityQueue = DefaultMaxNumElementsInNonPriorityQueue,
+): GossipSubParams =
   GossipSubParams(
-      explicit: true,
-      pruneBackoff: 1.minutes,
-      unsubscribeBackoff: 5.seconds,
-      floodPublish: true,
-      gossipFactor: 0.25,
-      d: GossipSubD,
-      dLow: GossipSubDlo,
-      dHigh: GossipSubDhi,
-      dScore: GossipSubDlo,
-      dOut: GossipSubDlo - 1, # DLow - 1
-      dLazy: GossipSubD, # Like D
-      heartbeatInterval: GossipSubHeartbeatInterval,
-      historyLength: GossipSubHistoryLength,
-      historyGossip: GossipSubHistoryGossip,
-      fanoutTTL: GossipSubFanoutTTL,
-      seenTTL: 2.minutes,
-      gossipThreshold: -100,
-      publishThreshold: -1000,
-      graylistThreshold: -10000,
-      opportunisticGraftThreshold: 0,
-      decayInterval: 1.seconds,
-      decayToZero: 0.01,
-      retainScore: 2.minutes,
-      appSpecificWeight: 0.0,
-      ipColocationFactorWeight: 0.0,
-      ipColocationFactorThreshold: 1.0,
-      behaviourPenaltyWeight: -1.0,
-      behaviourPenaltyDecay: 0.999,
-      disconnectBadPeers: false,
-      enablePX: false
-    )
+    explicit: true,
+    pruneBackoff: pruneBackoff,
+    unsubscribeBackoff: unsubscribeBackoff,
+    floodPublish: floodPublish,
+    gossipFactor: gossipFactor,
+    d: d,
+    dLow: dLow,
+    dHigh: dHigh,
+    dScore: dScore,
+    dOut: dOut,
+    dLazy: dLazy,
+    heartbeatInterval: heartbeatInterval,
+    historyLength: historyLength,
+    historyGossip: historyGossip,
+    fanoutTTL: fanoutTTL,
+    seenTTL: seenTTL,
+    gossipThreshold: gossipThreshold,
+    publishThreshold: publishThreshold,
+    graylistThreshold: graylistThreshold,
+    opportunisticGraftThreshold: opportunisticGraftThreshold,
+    decayInterval: decayInterval,
+    decayToZero: decayToZero,
+    retainScore: retainScore,
+    appSpecificWeight: appSpecificWeight,
+    ipColocationFactorWeight: ipColocationFactorWeight,
+    ipColocationFactorThreshold: ipColocationFactorThreshold,
+    behaviourPenaltyWeight: behaviourPenaltyWeight,
+    behaviourPenaltyDecay: behaviourPenaltyDecay,
+    directPeers: directPeers,
+    disconnectBadPeers: disconnectBadPeers,
+    enablePX: enablePX,
+    bandwidthEstimatebps: bandwidthEstimatebps,
+    overheadRateLimit: overheadRateLimit,
+    disconnectPeerAboveRateLimit: disconnectPeerAboveRateLimit,
+    maxNumElementsInNonPriorityQueue: maxNumElementsInNonPriorityQueue,
+  )
 
 proc validateParameters*(parameters: GossipSubParams): Result[void, cstring] =
-  if  (parameters.dOut >= parameters.dLow) or
-      (parameters.dOut > (parameters.d div 2)):
-    err("gossipsub: dOut parameter error, Number of outbound connections to keep in the mesh. Must be less than D_lo and at most D/2")
+  if (parameters.dOut >= parameters.dLow) or (parameters.dOut > (parameters.d div 2)):
+    err(
+      "gossipsub: dOut parameter error, Number of outbound connections to keep in the mesh. Must be less than D_lo and at most D/2"
+    )
   elif parameters.gossipThreshold >= 0:
     err("gossipsub: gossipThreshold parameter error, Must be < 0")
   elif parameters.unsubscribeBackoff.seconds <= 0:
@@ -108,6 +170,8 @@ proc validateParameters*(parameters: GossipSubParams): Result[void, cstring] =
     err("gossipsub: behaviourPenaltyWeight parameter error, Must be negative")
   elif parameters.behaviourPenaltyDecay < 0 or parameters.behaviourPenaltyDecay >= 1:
     err("gossipsub: behaviourPenaltyDecay parameter error, Must be between 0 and 1")
+  elif parameters.maxNumElementsInNonPriorityQueue <= 0:
+    err("gossipsub: maxNumElementsInNonPriorityQueue parameter error, Must be > 0")
   else:
     ok()
 
@@ -117,17 +181,29 @@ proc validateParameters*(parameters: TopicParams): Result[void, cstring] =
   elif parameters.timeInMeshCap <= 0.0:
     err("gossipsub: timeInMeshCap parameter error, Should be a positive value")
   elif parameters.firstMessageDeliveriesWeight <= 0.0:
-    err("gossipsub: firstMessageDeliveriesWeight parameter error, Should be a positive value")
+    err(
+      "gossipsub: firstMessageDeliveriesWeight parameter error, Should be a positive value"
+    )
   elif parameters.meshMessageDeliveriesWeight >= 0.0:
-    err("gossipsub: meshMessageDeliveriesWeight parameter error, Should be a negative value")
+    err(
+      "gossipsub: meshMessageDeliveriesWeight parameter error, Should be a negative value"
+    )
   elif parameters.meshMessageDeliveriesThreshold <= 0.0:
-    err("gossipsub: meshMessageDeliveriesThreshold parameter error, Should be a positive value")
+    err(
+      "gossipsub: meshMessageDeliveriesThreshold parameter error, Should be a positive value"
+    )
   elif parameters.meshMessageDeliveriesCap < parameters.meshMessageDeliveriesThreshold:
-    err("gossipsub: meshMessageDeliveriesCap parameter error, Should be >= meshMessageDeliveriesThreshold")
+    err(
+      "gossipsub: meshMessageDeliveriesCap parameter error, Should be >= meshMessageDeliveriesThreshold"
+    )
   elif parameters.meshFailurePenaltyWeight >= 0.0:
-    err("gossipsub: meshFailurePenaltyWeight parameter error, Should be a negative value")
+    err(
+      "gossipsub: meshFailurePenaltyWeight parameter error, Should be a negative value"
+    )
   elif parameters.invalidMessageDeliveriesWeight >= 0.0:
-    err("gossipsub: invalidMessageDeliveriesWeight parameter error, Should be a negative value")
+    err(
+      "gossipsub: invalidMessageDeliveriesWeight parameter error, Should be a negative value"
+    )
   else:
     ok()
 
@@ -147,26 +223,32 @@ method init*(g: GossipSub) =
       trace "GossipSub handler leaks an error", exc = exc.msg, conn
 
   g.handler = handler
-  g.codecs &= GossipSubCodec
+  g.codecs &= GossipSubCodec_12
+  g.codecs &= GossipSubCodec_11
   g.codecs &= GossipSubCodec_10
 
-method onNewPeer(g: GossipSub, peer: PubSubPeer) =
-  g.withPeerStats(peer.peerId) do (stats: var PeerStats):
+method onNewPeer*(g: GossipSub, peer: PubSubPeer) =
+  g.withPeerStats(peer.peerId) do(stats: var PeerStats):
     # Make sure stats and peer information match, even when reloading peer stats
     # from a previous connection
     peer.score = stats.score
     peer.appScore = stats.appScore
     peer.behaviourPenalty = stats.behaviourPenalty
 
-    peer.iWantBudget = IWantPeerBudget
-    peer.iHaveBudget = IHavePeerBudget
+    # Check if the score is below the threshold and disconnect the peer if necessary
+    g.disconnectIfBadScorePeer(peer, stats.score)
 
-method onPubSubPeerEvent*(p: GossipSub, peer: PubSubPeer, event: PubSubPeerEvent) {.gcsafe.} =
+  peer.iHaveBudget = IHavePeerBudget
+  peer.pingBudget = PingsPeerBudget
+
+method onPubSubPeerEvent*(
+    p: GossipSub, peer: PubSubPeer, event: PubSubPeerEvent
+) {.gcsafe.} =
   case event.kind
-  of PubSubPeerEventKind.Connected:
+  of PubSubPeerEventKind.StreamOpened:
     discard
-  of PubSubPeerEventKind.Disconnected:
-    # If a send connection is lost, it's better to remove peer from the mesh -
+  of PubSubPeerEventKind.StreamClosed:
+    # If a send stream is lost, it's better to remove peer from the mesh -
     # if it gets reestablished, the peer will be readded to the mesh, and if it
     # doesn't, well.. then we hope the peer is going away!
     for topic, peers in p.mesh.mpairs():
@@ -174,6 +256,8 @@ method onPubSubPeerEvent*(p: GossipSub, peer: PubSubPeer, event: PubSubPeerEvent
       peers.excl(peer)
     for _, peers in p.fanout.mpairs():
       peers.excl(peer)
+  of PubSubPeerEventKind.DisconnectionRequested:
+    asyncSpawn p.disconnectPeer(peer) # this should unsubscribePeer the peer too
 
   procCall FloodSub(p).onPubSubPeerEvent(peer, event)
 
@@ -188,11 +272,11 @@ method unsubscribePeer*(g: GossipSub, peer: PeerId) =
     return
 
   # remove from peer IPs collection too
-  if pubSubPeer.address.isSome():
-    g.peersInIP.withValue(pubSubPeer.address.get(), s):
+  pubSubPeer.address.withValue(address):
+    g.peersInIP.withValue(address, s):
       s[].excl(pubSubPeer.peerId)
       if s[].len == 0:
-        g.peersInIP.del(pubSubPeer.address.get())
+        g.peersInIP.del(address)
 
   for t in toSeq(g.mesh.keys):
     trace "pruning unsubscribing peer", pubSubPeer, score = pubSubPeer.score
@@ -201,8 +285,8 @@ method unsubscribePeer*(g: GossipSub, peer: PeerId) =
 
   for t in toSeq(g.gossipsub.keys):
     g.gossipsub.removePeer(t, pubSubPeer)
-    # also try to remove from explicit table here
-    g.explicit.removePeer(t, pubSubPeer)
+    # also try to remove from direct peers table here
+    g.subscribedDirectPeers.removePeer(t, pubSubPeer)
 
   for t in toSeq(g.fanout.keys):
     g.fanout.removePeer(t, pubSubPeer)
@@ -211,12 +295,11 @@ method unsubscribePeer*(g: GossipSub, peer: PeerId) =
     for topic, info in stats[].topicInfos.mpairs:
       info.firstMessageDeliveries = 0
 
+  pubSubPeer.stopSendNonPriorityTask()
+
   procCall FloodSub(g).unsubscribePeer(peer)
 
-proc handleSubscribe*(g: GossipSub,
-                      peer: PubSubPeer,
-                      topic: string,
-                      subscribe: bool) =
+proc handleSubscribe(g: GossipSub, peer: PubSubPeer, topic: string, subscribe: bool) =
   logScope:
     peer
     topic
@@ -230,7 +313,7 @@ proc handleSubscribe*(g: GossipSub,
       trace "ignoring unknown peer"
       return
 
-    if not(isNil(g.subscriptionValidator)) and not(g.subscriptionValidator(topic)):
+    if not (isNil(g.subscriptionValidator)) and not (g.subscriptionValidator(topic)):
       # this is a violation, so warn should be in order
       trace "ignoring invalid topic subscription", topic, peer
       libp2p_gossipsub_invalid_topic_subscription.inc()
@@ -241,7 +324,7 @@ proc handleSubscribe*(g: GossipSub,
     # subscribe remote peer to the topic
     discard g.gossipsub.addPeer(topic, peer)
     if peer.peerId in g.parameters.directPeers:
-      discard g.explicit.addPeer(topic, peer)
+      discard g.subscribedDirectPeers.addPeer(topic, peer)
   else:
     trace "peer unsubscribed from topic"
 
@@ -255,7 +338,7 @@ proc handleSubscribe*(g: GossipSub,
 
     g.fanout.removePeer(topic, peer)
     if peer.peerId in g.parameters.directPeers:
-      g.explicit.removePeer(topic, peer)
+      g.subscribedDirectPeers.removePeer(topic, peer)
 
   trace "gossip peers", peers = g.gossipsub.peers(topic), topic
 
@@ -263,54 +346,97 @@ proc handleControl(g: GossipSub, peer: PubSubPeer, control: ControlMessage) =
   g.handlePrune(peer, control.prune)
 
   var respControl: ControlMessage
+  g.handleIDontWant(peer, control.idontwant)
   let iwant = g.handleIHave(peer, control.ihave)
-  if iwant.messageIds.len > 0:
+  if iwant.messageIDs.len > 0:
     respControl.iwant.add(iwant)
   respControl.prune.add(g.handleGraft(peer, control.graft))
   let messages = g.handleIWant(peer, control.iwant)
 
-  if
-    respControl.prune.len > 0 or
-    respControl.iwant.len > 0 or
-    messages.len > 0:
-    # iwant and prunes from here, also messages
+  let
+    isPruneNotEmpty = respControl.prune.len > 0
+    isIWantNotEmpty = respControl.iwant.len > 0
 
-    for smsg in messages:
-      for topic in smsg.topicIds:
-        if g.knownTopics.contains(topic):
-          libp2p_pubsub_broadcast_messages.inc(labelValues = [topic])
+  if isPruneNotEmpty or isIWantNotEmpty:
+    if isIWantNotEmpty:
+      libp2p_pubsub_broadcast_iwant.inc(respControl.iwant.len.int64)
+
+    if isPruneNotEmpty:
+      for prune in respControl.prune:
+        if g.knownTopics.contains(prune.topicID):
+          libp2p_pubsub_broadcast_prune.inc(labelValues = [prune.topicID])
         else:
-          libp2p_pubsub_broadcast_messages.inc(labelValues = ["generic"])
-
-    libp2p_pubsub_broadcast_iwant.inc(respControl.iwant.len.int64)
-
-    for prune in respControl.prune:
-      if g.knownTopics.contains(prune.topicId):
-        libp2p_pubsub_broadcast_prune.inc(labelValues = [prune.topicId])
-      else:
-        libp2p_pubsub_broadcast_prune.inc(labelValues = ["generic"])
+          libp2p_pubsub_broadcast_prune.inc(labelValues = ["generic"])
 
     trace "sending control message", msg = shortLog(respControl), peer
-    g.send(
-      peer,
-      RPCMsg(control: some(respControl), messages: messages))
+    g.send(peer, RPCMsg(control: some(respControl)), isHighPriority = true)
 
-proc validateAndRelay(g: GossipSub,
-                      msg: Message,
-                      msgId, msgIdSalted: MessageId,
-                      peer: PubSubPeer) {.async.} =
+  if messages.len > 0:
+    for smsg in messages:
+      let topic = smsg.topic
+      if g.knownTopics.contains(topic):
+        libp2p_pubsub_broadcast_messages.inc(labelValues = [topic])
+      else:
+        libp2p_pubsub_broadcast_messages.inc(labelValues = ["generic"])
+
+    # iwant replies have lower priority
+    trace "sending iwant reply messages", peer
+    g.send(peer, RPCMsg(messages: messages), isHighPriority = false)
+
+proc validateAndRelay(
+    g: GossipSub, msg: Message, msgId: MessageId, saltedId: SaltedId, peer: PubSubPeer
+) {.async.} =
   try:
+    template topic(): string =
+      msg.topic
+
+    proc addToSendPeers(toSendPeers: var HashSet[PubSubPeer]) =
+      g.floodsub.withValue(topic, peers):
+        toSendPeers.incl(peers[])
+      g.mesh.withValue(topic, peers):
+        toSendPeers.incl(peers[])
+      g.subscribedDirectPeers.withValue(topic, peers):
+        toSendPeers.incl(peers[])
+      toSendPeers.excl(peer)
+
+    if msg.data.len > max(512, msgId.len * 10):
+      # If the message is "large enough", let the mesh know that we do not want
+      # any more copies of it, regardless if it is valid or not.
+      #
+      # In the case that it is not valid, this leads to some redundancy
+      # (since the other peer should not send us an invalid message regardless),
+      # but the expectation is that this is rare (due to such peers getting
+      # descored) and that the savings from honest peers are greater than the
+      # cost a dishonest peer can incur in short time (since the IDONTWANT is
+      # small).
+      var peersToSendIDontWant = HashSet[PubSubPeer]()
+      addToSendPeers(peersToSendIDontWant)
+      peersToSendIDontWant.exclIfIt(
+        it.codec == GossipSubCodec_10 or it.codec == GossipSubCodec_11
+      )
+      g.broadcast(
+        peersToSendIDontWant,
+        RPCMsg(
+          control:
+            some(ControlMessage(idontwant: @[ControlIWant(messageIDs: @[msgId])]))
+        ),
+        isHighPriority = true,
+      )
+
     let validation = await g.validate(msg)
 
     var seenPeers: HashSet[PubSubPeer]
-    discard g.validationSeen.pop(msgIdSalted, seenPeers)
+    discard g.validationSeen.pop(saltedId, seenPeers)
     libp2p_gossipsub_duplicate_during_validation.inc(seenPeers.len.int64)
+    libp2p_gossipsub_saved_bytes.inc(
+      (msg.data.len * seenPeers.len).int64, labelValues = ["validation_duplicate"]
+    )
 
     case validation
     of ValidationResult.Reject:
       debug "Dropping message after validation, reason: reject",
         msgId = shortLog(msgId), peer
-      g.punishInvalidMessage(peer, msg.topicIds)
+      await g.punishInvalidMessage(peer, msg)
       return
     of ValidationResult.Ignore:
       debug "Dropping message after validation, reason: ignore",
@@ -319,72 +445,144 @@ proc validateAndRelay(g: GossipSub,
     of ValidationResult.Accept:
       discard
 
+    if topic notin g.topics:
+      return # Topic was unsubscribed while validating
+
     # store in cache only after validation
     g.mcache.put(msgId, msg)
 
-    g.rewardDelivered(peer, msg.topicIds, true)
+    g.rewardDelivered(peer, topic, true)
 
+    # trigger hooks
+    peer.validatedObservers(msg, msgId)
+
+    # The send list typically matches the idontwant list from above, but
+    # might differ if validation takes time
     var toSendPeers = HashSet[PubSubPeer]()
-    for t in msg.topicIds:                      # for every topic in the message
-      if t notin g.topics:
-        continue
-
-      g.floodsub.withValue(t, peers): toSendPeers.incl(peers[])
-      g.mesh.withValue(t, peers): toSendPeers.incl(peers[])
-
-    # Don't send it to source peer, or peers that
-    # sent it during validation
-    toSendPeers.excl(peer)
+    addToSendPeers(toSendPeers)
+    # Don't send it to peers that sent it during validation
     toSendPeers.excl(seenPeers)
 
+    proc isMsgInIdontWant(it: PubSubPeer): bool =
+      for iDontWant in it.iDontWants:
+        if saltedId in iDontWant:
+          libp2p_gossipsub_idontwant_saved_messages.inc
+          libp2p_gossipsub_saved_bytes.inc(
+            msg.data.len.int64, labelValues = ["idontwant"]
+          )
+          return true
+      return false
+
+    toSendPeers.exclIfIt(isMsgInIdontWant(it))
+
     # In theory, if topics are the same in all messages, we could batch - we'd
     # also have to be careful to only include validated messages
-    g.broadcast(toSendPeers, RPCMsg(messages: @[msg]))
-    trace "forwared message to peers", peers = toSendPeers.len, msgId, peer
-    for topic in msg.topicIds:
-      if topic notin g.topics: continue
+    g.broadcast(toSendPeers, RPCMsg(messages: @[msg]), isHighPriority = false)
+    trace "forwarded message to peers", peers = toSendPeers.len, msgId, peer
 
-      if g.knownTopics.contains(topic):
-        libp2p_pubsub_messages_rebroadcasted.inc(toSendPeers.len.int64, labelValues = [topic])
-      else:
-        libp2p_pubsub_messages_rebroadcasted.inc(toSendPeers.len.int64, labelValues = ["generic"])
+    if g.knownTopics.contains(topic):
+      libp2p_pubsub_messages_rebroadcasted.inc(
+        toSendPeers.len.int64, labelValues = [topic]
+      )
+    else:
+      libp2p_pubsub_messages_rebroadcasted.inc(
+        toSendPeers.len.int64, labelValues = ["generic"]
+      )
 
-      await handleData(g, topic, msg.data)
+    await handleData(g, topic, msg.data)
   except CatchableError as exc:
-    info "validateAndRelay failed", msg=exc.msg
+    info "validateAndRelay failed", msg = exc.msg
+
+proc dataAndTopicsIdSize(msgs: seq[Message]): int =
+  msgs.mapIt(it.data.len + it.topic.len).foldl(a + b, 0)
+
+proc messageOverhead(g: GossipSub, msg: RPCMsg, msgSize: int): int =
+  # In this way we count even ignored fields by protobuf
+  let
+    payloadSize =
+      if g.verifySignature:
+        byteSize(msg.messages)
+      else:
+        dataAndTopicsIdSize(msg.messages)
+    controlSize = msg.control.withValue(control):
+      byteSize(control.ihave) + byteSize(control.iwant)
+    do:
+      0
+
+  msgSize - payloadSize - controlSize
+
+proc rateLimit*(g: GossipSub, peer: PubSubPeer, overhead: int) {.async.} =
+  peer.overheadRateLimitOpt.withValue(overheadRateLimit):
+    if not overheadRateLimit.tryConsume(overhead):
+      libp2p_gossipsub_peers_rate_limit_hits.inc(labelValues = [peer.getAgent()])
+        # let's just measure at the beginning for test purposes.
+      debug "Peer sent too much useless application data and it's above rate limit.",
+        peer, overhead
+      if g.parameters.disconnectPeerAboveRateLimit:
+        await g.disconnectPeer(peer)
+        raise newException(
+          PeerRateLimitError, "Peer disconnected because it's above rate limit."
+        )
+
+method rpcHandler*(g: GossipSub, peer: PubSubPeer, data: seq[byte]) {.async.} =
+  let msgSize = data.len
+  var rpcMsg = decodeRpcMsg(data).valueOr:
+    debug "failed to decode msg from peer", peer, err = error
+    await rateLimit(g, peer, msgSize)
+    # Raising in the handler closes the gossipsub connection (but doesn't
+    # disconnect the peer!)
+    # TODO evaluate behaviour penalty values
+    peer.behaviourPenalty += 0.1
+
+    raise newException(CatchableError, "Peer msg couldn't be decoded")
+
+  when defined(libp2p_expensive_metrics):
+    for m in rpcMsg.messages:
+      libp2p_pubsub_received_messages.inc(labelValues = [$peer.peerId, m.topic])
+
+  trace "decoded msg from peer", peer, msg = rpcMsg.shortLog
+  await rateLimit(g, peer, g.messageOverhead(rpcMsg, msgSize))
+
+  # trigger hooks - these may modify the message
+  peer.recvObservers(rpcMsg)
+
+  if rpcMsg.ping.len in 1 ..< 64 and peer.pingBudget > 0:
+    g.send(peer, RPCMsg(pong: rpcMsg.ping), isHighPriority = true)
+    peer.pingBudget.dec
+
+  for i in 0 ..< min(g.topicsHigh, rpcMsg.subscriptions.len):
+    template sub(): untyped =
+      rpcMsg.subscriptions[i]
 
-method rpcHandler*(g: GossipSub,
-                  peer: PubSubPeer,
-                  rpcMsg: RPCMsg) {.async.} =
-  for i in 0..<min(g.topicsHigh, rpcMsg.subscriptions.len):
-    template sub: untyped = rpcMsg.subscriptions[i]
     g.handleSubscribe(peer, sub.topic, sub.subscribe)
 
   # the above call applied limits to subs number
   # in gossipsub we want to apply scoring as well
   if rpcMsg.subscriptions.len > g.topicsHigh:
-    debug "received an rpc message with an oversized amount of subscriptions",  peer,
-                                                                                size = rpcMsg.subscriptions.len,
-                                                                                limit = g.topicsHigh
+    debug "received an rpc message with an oversized amount of subscriptions",
+      peer, size = rpcMsg.subscriptions.len, limit = g.topicsHigh
     peer.behaviourPenalty += 0.1
 
-  for i in 0..<rpcMsg.messages.len():                         # for every message
-    template msg: untyped = rpcMsg.messages[i]
+  for i in 0 ..< rpcMsg.messages.len(): # for every message
+    template msg(): untyped =
+      rpcMsg.messages[i]
+
+    template topic(): string =
+      msg.topic
+
     let msgIdResult = g.msgIdProvider(msg)
 
     if msgIdResult.isErr:
       debug "Dropping message due to failed message id generation",
         error = msgIdResult.error
-      # TODO: descore peers due to error during message validation (malicious?)
+      await g.punishInvalidMessage(peer, msg)
       continue
 
     let
       msgId = msgIdResult.get
-      msgIdSalted = msgId & g.seenSalt
+      msgIdSalted = g.salt(msgId)
 
-    # addSeen adds salt to msgId to avoid
-    # remote attacking the hash function
-    if g.addSeen(msgId):
+    if g.addSeen(msgIdSalted):
       trace "Dropping already-seen message", msgId = shortLog(msgId), peer
 
       var alreadyReceived = false
@@ -394,8 +592,8 @@ method rpcHandler*(g: GossipSub,
           alreadyReceived = true
 
       if not alreadyReceived:
-        let delay = Moment.now() - g.firstSeen(msgId)
-        g.rewardDelivered(peer, msg.topicIds, false, delay)
+        let delay = Moment.now() - g.firstSeen(msgIdSalted)
+        g.rewardDelivered(peer, topic, false, delay)
 
       libp2p_gossipsub_duplicate.inc()
 
@@ -405,22 +603,23 @@ method rpcHandler*(g: GossipSub,
     libp2p_gossipsub_received.inc()
 
     # avoid processing messages we are not interested in
-    if msg.topicIds.allIt(it notin g.topics):
-      debug "Dropping message of topic without subscription", msgId = shortLog(msgId), peer
+    if topic notin g.topics:
+      debug "Dropping message of topic without subscription",
+        msgId = shortLog(msgId), peer
       continue
 
     if (msg.signature.len > 0 or g.verifySignature) and not msg.verify():
       # always validate if signature is present or required
       debug "Dropping message due to failed signature verification",
         msgId = shortLog(msgId), peer
-      g.punishInvalidMessage(peer, msg.topicIds)
+      await g.punishInvalidMessage(peer, msg)
       continue
 
     if msg.seqno.len > 0 and msg.seqno.len != 8:
       # if we have seqno should be 8 bytes long
       debug "Dropping message due to invalid seqno length",
         msgId = shortLog(msgId), peer
-      g.punishInvalidMessage(peer, msg.topicIds)
+      await g.punishInvalidMessage(peer, msg)
       continue
 
     # g.anonymize needs no evaluation when receiving messages
@@ -436,7 +635,7 @@ method rpcHandler*(g: GossipSub,
     g.handleControl(peer, rpcMsg.control.unsafeGet())
 
   # Now, check subscription to update the meshes if required
-  for i in 0..<min(g.topicsHigh, rpcMsg.subscriptions.len):
+  for i in 0 ..< min(g.topicsHigh, rpcMsg.subscriptions.len):
     let topic = rpcMsg.subscriptions[i].topic
     if topic in g.topics and g.mesh.peers(topic) < g.parameters.dLow:
       # rebalance but don't update metrics here, we do that only in the heartbeat
@@ -459,83 +658,101 @@ method onTopicSubscription*(g: GossipSub, topic: string, subscribed: bool) =
 
     # Remove peers from the mesh since we're no longer both interested
     # in the topic
-    let msg = RPCMsg(control: some(ControlMessage(
-          prune: @[ControlPrune(
-            topicID: topic,
-            peers: g.peerExchangeList(topic),
-            backoff: g.parameters.unsubscribeBackoff.seconds.uint64)])))
-    g.broadcast(mpeers, msg)
+    let msg = RPCMsg(
+      control: some(
+        ControlMessage(
+          prune:
+            @[
+              ControlPrune(
+                topicID: topic,
+                peers: g.peerExchangeList(topic),
+                backoff: g.parameters.unsubscribeBackoff.seconds.uint64,
+              )
+            ]
+        )
+      )
+    )
+    g.broadcast(mpeers, msg, isHighPriority = true)
 
     for peer in mpeers:
       g.pruned(peer, topic, backoff = some(g.parameters.unsubscribeBackoff))
 
     g.mesh.del(topic)
 
-
     # Send unsubscribe (in reverse order to sub/graft)
     procCall PubSub(g).onTopicSubscription(topic, subscribed)
 
-method publish*(g: GossipSub,
-                topic: string,
-                data: seq[byte]): Future[int] {.async.} =
-  # base returns always 0
-  discard await procCall PubSub(g).publish(topic, data)
-
+method publish*(g: GossipSub, topic: string, data: seq[byte]): Future[int] {.async.} =
   logScope:
     topic
 
-  trace "Publishing message on topic", data = data.shortLog
-
   if topic.len <= 0: # data could be 0/empty
     debug "Empty topic, skipping publish"
     return 0
 
+  # base returns always 0
+  discard await procCall PubSub(g).publish(topic, data)
+
+  trace "Publishing message on topic", data = data.shortLog
+
   var peers: HashSet[PubSubPeer]
 
-  if g.parameters.floodPublish:
-    # With flood publishing enabled, the mesh is used when propagating messages from other peers,
-    # but a peer's own messages will always be published to all known peers in the topic.
-    for peer in g.gossipsub.getOrDefault(topic):
-      if peer.score >= g.parameters.publishThreshold:
-        trace "publish: including flood/high score peer", peer
-        peers.incl(peer)
-
   # add always direct peers
-  peers.incl(g.explicit.getOrDefault(topic))
+  peers.incl(g.subscribedDirectPeers.getOrDefault(topic))
 
   if topic in g.topics: # if we're subscribed use the mesh
     peers.incl(g.mesh.getOrDefault(topic))
 
-  if peers.len < g.parameters.dLow and g.parameters.floodPublish == false:
-    # not subscribed or bad mesh, send to fanout peers
-    # disable for floodPublish, since we already sent to every good peer
-    #
-    var fanoutPeers = g.fanout.getOrDefault(topic).toSeq()
-    if fanoutPeers.len == 0:
-      g.replenishFanout(topic)
-      fanoutPeers = g.fanout.getOrDefault(topic).toSeq()
+  if g.parameters.floodPublish:
+    # With flood publishing enabled, the mesh is used when propagating messages from other peers,
+    # but a peer's own messages will always be published to all known peers in the topic, limited
+    # to the amount of peers we can send it to in one heartbeat
 
+    let maxPeersToFlood =
+      if g.parameters.bandwidthEstimatebps > 0:
+        let
+          bandwidth = (g.parameters.bandwidthEstimatebps) div 8 div 1000
+            # Divisions are to convert it to Bytes per ms TODO replace with bandwidth estimate
+          msToTransmit = max(data.len div bandwidth, 1)
+        max(
+          g.parameters.heartbeatInterval.milliseconds div msToTransmit,
+          g.parameters.dLow,
+        )
+      else:
+        int.high() # unlimited
+
+    for peer in g.gossipsub.getOrDefault(topic):
+      if peers.len >= maxPeersToFlood:
+        break
+
+      if peer.score >= g.parameters.publishThreshold:
+        trace "publish: including flood/high score peer", peer
+        peers.incl(peer)
+  elif peers.len < g.parameters.dLow:
+    # not subscribed or bad mesh, send to fanout peers
+    # when flood-publishing, fanout won't help since all potential peers have
+    # already been added
+
+    g.replenishFanout(topic) # Make sure fanout is populated
+
+    var fanoutPeers = g.fanout.getOrDefault(topic).toSeq()
     g.rng.shuffle(fanoutPeers)
-    if fanoutPeers.len + peers.len > g.parameters.d:
-      fanoutPeers.setLen(g.parameters.d - peers.len)
 
     for fanPeer in fanoutPeers:
       peers.incl(fanPeer)
-      if peers.len > g.parameters.d: break
+      if peers.len > g.parameters.d:
+        break
 
-    # even if we couldn't publish,
-    # we still attempted to publish
-    # on the topic, so it makes sense
-    # to update the last topic publish
-    # time
+    # Attempting to publish counts as fanout send (even if the message
+    # ultimately is not sent)
     g.lastFanoutPubSub[topic] = Moment.fromNow(g.parameters.fanoutTTL)
 
   if peers.len == 0:
     let topicPeers = g.gossipsub.getOrDefault(topic).toSeq()
-    debug "No peers for topic, skipping publish",  peersOnTopic = topicPeers.len,
-                                                   connectedPeers = topicPeers.filterIt(it.connected).len,
-                                                   topic
-    # skipping topic as our metrics finds that heavy
+    debug "No peers for topic, skipping publish",
+      peersOnTopic = topicPeers.len,
+      connectedPeers = topicPeers.filterIt(it.connected).len,
+      topic
     libp2p_gossipsub_failed_publish.inc()
     return 0
 
@@ -547,39 +764,42 @@ method publish*(g: GossipSub,
         inc g.msgSeqno
         Message.init(some(g.peerInfo), data, topic, some(g.msgSeqno), g.sign)
     msgId = g.msgIdProvider(msg).valueOr:
-      trace "Error generating message id, skipping publish",
-        error = error
+      trace "Error generating message id, skipping publish", error = error
       libp2p_gossipsub_failed_publish.inc()
       return 0
 
-  logScope: msgId = shortLog(msgId)
+  logScope:
+    msgId = shortLog(msgId)
 
   trace "Created new message", msg = shortLog(msg), peers = peers.len
 
-  if g.addSeen(msgId):
-    # custom msgid providers might cause this
+  if g.addSeen(g.salt(msgId)):
+    # If the message was received or published recently, don't re-publish it -
+    # this might happen when not using sequence id:s and / or with a custom
+    # message id provider
     trace "Dropping already-seen message"
     return 0
 
   g.mcache.put(msgId, msg)
 
-  g.broadcast(peers, RPCMsg(messages: @[msg]))
+  g.broadcast(peers, RPCMsg(messages: @[msg]), isHighPriority = true)
 
   if g.knownTopics.contains(topic):
     libp2p_pubsub_messages_published.inc(peers.len.int64, labelValues = [topic])
   else:
     libp2p_pubsub_messages_published.inc(peers.len.int64, labelValues = ["generic"])
 
-  trace "Published message to peers", peers=peers.len
-
+  trace "Published message to peers", peers = peers.len
   return peers.len
 
 proc maintainDirectPeer(g: GossipSub, id: PeerId, addrs: seq[MultiAddress]) {.async.} =
-  let peer = g.peers.getOrDefault(id)
-  if isNil(peer):
+  if id notin g.peers:
     trace "Attempting to dial a direct peer", peer = id
+    if g.switch.isConnected(id):
+      warn "We are connected to a direct peer, but it isn't a GossipSub peer!", id
+      return
     try:
-      await g.switch.connect(id, addrs)
+      await g.switch.connect(id, addrs, forceDial = true)
       # populate the peer after it's connected
       discard g.getOrCreatePeer(id, g.codecs)
     except CancelledError as exc:
@@ -597,33 +817,42 @@ proc maintainDirectPeers(g: GossipSub) {.async.} =
     for id, addrs in g.parameters.directPeers:
       await g.addDirectPeer(id, addrs)
 
-method start*(g: GossipSub) {.async.} =
+method start*(
+    g: GossipSub
+): Future[void] {.async: (raises: [CancelledError], raw: true).} =
+  let fut = newFuture[void]()
+  fut.complete()
+
   trace "gossipsub start"
 
   if not g.heartbeatFut.isNil:
     warn "Starting gossipsub twice"
-    return
+    return fut
 
   g.heartbeatFut = g.heartbeat()
   g.scoringHeartbeatFut = g.scoringHeartbeat()
   g.directPeersLoop = g.maintainDirectPeers()
   g.started = true
+  fut
+
+method stop*(g: GossipSub): Future[void] {.async: (raises: [], raw: true).} =
+  let fut = newFuture[void]()
+  fut.complete()
 
-method stop*(g: GossipSub) {.async.} =
   trace "gossipsub stop"
   g.started = false
   if g.heartbeatFut.isNil:
     warn "Stopping gossipsub without starting it"
-    return
+    return fut
 
   # stop heartbeat interval
   g.directPeersLoop.cancel()
   g.scoringHeartbeatFut.cancel()
   g.heartbeatFut.cancel()
   g.heartbeatFut = nil
+  fut
 
-method initPubSub*(g: GossipSub)
-  {.raises: [Defect, InitializationError].} =
+method initPubSub*(g: GossipSub) {.raises: [InitializationError].} =
   procCall FloodSub(g).initPubSub()
 
   if not g.parameters.explicit:
@@ -634,7 +863,20 @@ method initPubSub*(g: GossipSub)
     raise newException(InitializationError, $validationRes.error)
 
   # init the floodsub stuff here, we customize timedcache in gossip!
-  g.seen = TimedCache[MessageId].init(g.parameters.seenTTL)
+  g.seen = TimedCache[SaltedId].init(g.parameters.seenTTL)
 
   # init gossip stuff
   g.mcache = MCache.init(g.parameters.historyGossip, g.parameters.historyLength)
+
+method getOrCreatePeer*(
+    g: GossipSub,
+    peerId: PeerId,
+    protosToDial: seq[string],
+    protoNegotiated: string = "",
+): PubSubPeer =
+  let peer = procCall PubSub(g).getOrCreatePeer(peerId, protosToDial, protoNegotiated)
+  g.parameters.overheadRateLimit.withValue(overheadRateLimit):
+    peer.overheadRateLimitOpt =
+      Opt.some(TokenBucket.new(overheadRateLimit.bytes, overheadRateLimit.interval))
+  peer.maxNumElementsInNonPriorityQueue = g.parameters.maxNumElementsInNonPriorityQueue
+  return peer

libp2p/protocols/pubsub/gossipsub/behavior.nim

@@ -7,34 +7,62 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[tables, sequtils, sets, algorithm]
+import std/[tables, sequtils, sets, algorithm, deques]
 import chronos, chronicles, metrics
 import "."/[types, scoring]
-import ".."/[pubsubpeer, peertable, timedcache, mcache, floodsub, pubsub]
+import ".."/[pubsubpeer, peertable, mcache, floodsub, pubsub]
 import "../rpc"/[messages]
-import "../../.."/[peerid, multiaddress, utility, switch, routing_record, signed_envelope, utils/heartbeat]
+import
+  "../../.."/[
+    peerid,
+    multiaddress,
+    utility,
+    switch,
+    routing_record,
+    signed_envelope,
+    utils/heartbeat,
+  ]
 
 logScope:
   topics = "libp2p gossipsub"
 
 declareGauge(libp2p_gossipsub_cache_window_size, "the number of messages in the cache")
-declareGauge(libp2p_gossipsub_peers_per_topic_mesh, "gossipsub peers per topic in mesh", labels = ["topic"])
-declareGauge(libp2p_gossipsub_peers_per_topic_fanout, "gossipsub peers per topic in fanout", labels = ["topic"])
-declareGauge(libp2p_gossipsub_peers_per_topic_gossipsub, "gossipsub peers per topic in gossipsub", labels = ["topic"])
+declareGauge(
+  libp2p_gossipsub_peers_per_topic_mesh,
+  "gossipsub peers per topic in mesh",
+  labels = ["topic"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_per_topic_fanout,
+  "gossipsub peers per topic in fanout",
+  labels = ["topic"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_per_topic_gossipsub,
+  "gossipsub peers per topic in gossipsub",
+  labels = ["topic"],
+)
 declareGauge(libp2p_gossipsub_under_dout_topics, "number of topics below dout")
 declareGauge(libp2p_gossipsub_no_peers_topics, "number of topics in mesh with no peers")
-declareGauge(libp2p_gossipsub_low_peers_topics, "number of topics in mesh with at least one but below dlow peers")
-declareGauge(libp2p_gossipsub_healthy_peers_topics, "number of topics in mesh with at least dlow peers (but below dhigh)")
-declareCounter(libp2p_gossipsub_above_dhigh_condition, "number of above dhigh pruning branches ran", labels = ["topic"])
-declareSummary(libp2p_gossipsub_mcache_hit, "ratio of successful IWANT message cache lookups")
+declareGauge(
+  libp2p_gossipsub_low_peers_topics,
+  "number of topics in mesh with at least one but below dlow peers",
+)
+declareGauge(
+  libp2p_gossipsub_healthy_peers_topics,
+  "number of topics in mesh with at least dlow peers (but below dhigh)",
+)
+declareCounter(
+  libp2p_gossipsub_above_dhigh_condition,
+  "number of above dhigh pruning branches ran",
+  labels = ["topic"],
+)
+declareGauge(libp2p_gossipsub_received_iwants, "received iwants", labels = ["kind"])
 
-proc grafted*(g: GossipSub, p: PubSubPeer, topic: string) {.raises: [Defect].} =
-  g.withPeerStats(p.peerId) do (stats: var PeerStats):
+proc grafted*(g: GossipSub, p: PubSubPeer, topic: string) =
+  g.withPeerStats(p.peerId) do(stats: var PeerStats):
     var info = stats.topicInfos.getOrDefault(topic)
     info.graftTime = Moment.now()
     info.meshTime = 0.seconds
@@ -43,57 +71,55 @@ proc grafted*(g: GossipSub, p: PubSubPeer, topic: string) {.raises: [Defect].} =
 
     stats.topicInfos[topic] = info
 
-    trace "grafted", peer=p, topic
+    trace "grafted", peer = p, topic
 
-proc pruned*(g: GossipSub,
-             p: PubSubPeer,
-             topic: string,
-             setBackoff: bool = true,
-             backoff = none(Duration)) {.raises: [Defect].} =
+proc pruned*(
+    g: GossipSub,
+    p: PubSubPeer,
+    topic: string,
+    setBackoff: bool = true,
+    backoff = none(Duration),
+) =
   if setBackoff:
     let
-      backoffDuration =
-        if isSome(backoff): backoff.get()
-        else: g.parameters.pruneBackoff
+      backoffDuration = backoff.get(g.parameters.pruneBackoff)
       backoffMoment = Moment.fromNow(backoffDuration)
 
-    g.backingOff
-      .mgetOrPut(topic, initTable[PeerId, Moment]())[p.peerId] = backoffMoment
+    g.backingOff.mgetOrPut(topic, initTable[PeerId, Moment]())[p.peerId] = backoffMoment
 
   g.peerStats.withValue(p.peerId, stats):
     stats.topicInfos.withValue(topic, info):
       g.topicParams.withValue(topic, topicParams):
         # penalize a peer that delivered no message
         let threshold = topicParams[].meshMessageDeliveriesThreshold
-        if info[].inMesh and
-            info[].meshMessageDeliveriesActive and
+        if info[].inMesh and info[].meshMessageDeliveriesActive and
             info[].meshMessageDeliveries < threshold:
           let deficit = threshold - info.meshMessageDeliveries
           info[].meshFailurePenalty += deficit * deficit
 
       info.inMesh = false
 
-      trace "pruned", peer=p, topic
+      trace "pruned", peer = p, topic
 
-proc handleBackingOff*(t: var BackoffTable, topic: string) {.raises: [Defect].} =
+proc handleBackingOff*(t: var BackoffTable, topic: string) =
   let now = Moment.now()
   var expired = toSeq(t.getOrDefault(topic).pairs())
-  expired.keepIf do (pair: tuple[peer: PeerId, expire: Moment]) -> bool:
+  expired.keepIf do(pair: tuple[peer: PeerId, expire: Moment]) -> bool:
     now >= pair.expire
   for (peer, _) in expired:
     t.withValue(topic, v):
       v[].del(peer)
 
-proc peerExchangeList*(g: GossipSub, topic: string): seq[PeerInfoMsg] {.raises: [Defect].} =
+proc peerExchangeList*(g: GossipSub, topic: string): seq[PeerInfoMsg] =
   if not g.parameters.enablePX:
     return @[]
   var peers = g.gossipsub.getOrDefault(topic, initHashSet[PubSubPeer]()).toSeq()
-  peers.keepIf do (x: PubSubPeer) -> bool:
-      x.score >= 0.0
+  peers.keepIf do(x: PubSubPeer) -> bool:
+    x.score >= 0.0
   # by spec, larger then Dhi, but let's put some hard caps
   peers.setLen(min(peers.len, g.parameters.dHigh * 2))
   let sprBook = g.switch.peerStore[SPRBook]
-  peers.map do (x: PubSubPeer) -> PeerInfoMsg:
+  peers.map do(x: PubSubPeer) -> PeerInfoMsg:
     PeerInfoMsg(
       peerId: x.peerId,
       signedPeerRecord:
@@ -101,52 +127,65 @@ proc peerExchangeList*(g: GossipSub, topic: string): seq[PeerInfoMsg] {.raises:
           sprBook[x.peerId].encode().get(default(seq[byte]))
         else:
           default(seq[byte])
-      )
+      ,
+    )
 
-proc handleGraft*(g: GossipSub,
-                 peer: PubSubPeer,
-                 grafts: seq[ControlGraft]): seq[ControlPrune] = # {.raises: [Defect].} TODO chronicles exception on windows
+proc handleGraft*(
+    g: GossipSub, peer: PubSubPeer, grafts: seq[ControlGraft]
+): seq[ControlPrune] =
   var prunes: seq[ControlPrune]
   for graft in grafts:
-    let topic = graft.topicId
-    trace "peer grafted topic", peer, topic
+    let topic = graft.topicID
+    trace "peer grafted topicID", peer, topic
 
-    # It is an error to GRAFT on a explicit peer
+    # It is an error to GRAFT on a direct peer
     if peer.peerId in g.parameters.directPeers:
       # receiving a graft from a direct peer should yield a more prominent warning (protocol violation)
-      warn "an explicit peer attempted to graft us, peering agreements should be reciprocal",
+      # we are trusting direct peer not to abuse this
+      warn "a direct peer attempted to graft us, peering agreements should be reciprocal",
         peer, topic
       # and such an attempt should be logged and rejected with a PRUNE
-      prunes.add(ControlPrune(
-        topicID: topic,
-        peers: @[], # omitting heavy computation here as the remote did something illegal
-        backoff: g.parameters.pruneBackoff.seconds.uint64))
+      prunes.add(
+        ControlPrune(
+          topicID: topic,
+          peers: @[],
+            # omitting heavy computation here as the remote did something illegal
+          backoff: g.parameters.pruneBackoff.seconds.uint64,
+        )
+      )
 
       let backoff = Moment.fromNow(g.parameters.pruneBackoff)
-      g.backingOff
-        .mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] = backoff
+
+      g.backingOff.mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] = backoff
 
       peer.behaviourPenalty += 0.1
 
       continue
 
+    if g.mesh.hasPeer(topic, peer):
+      trace "peer already in mesh", peer, topic
+      continue
+
     # Check backingOff
     # Ignore BackoffSlackTime here, since this only for outbound activity
     # and subtract a second time to avoid race conditions
     # (peers may wait to graft us as the exact instant they're allowed to)
-    if  g.backingOff
-          .getOrDefault(topic)
-          .getOrDefault(peer.peerId) - (BackoffSlackTime * 2).seconds > Moment.now():
+    if g.backingOff.getOrDefault(topic).getOrDefault(peer.peerId) -
+        (BackoffSlackTime * 2).seconds > Moment.now():
       debug "a backingOff peer attempted to graft us", peer, topic
       # and such an attempt should be logged and rejected with a PRUNE
-      prunes.add(ControlPrune(
-        topicID: topic,
-        peers: @[], # omitting heavy computation here as the remote did something illegal
-        backoff: g.parameters.pruneBackoff.seconds.uint64))
+      prunes.add(
+        ControlPrune(
+          topicID: topic,
+          peers: @[],
+            # omitting heavy computation here as the remote did something illegal
+          backoff: g.parameters.pruneBackoff.seconds.uint64,
+        )
+      )
 
       let backoff = Moment.fromNow(g.parameters.pruneBackoff)
-      g.backingOff
-        .mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] = backoff
+
+      g.backingOff.mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] = backoff
 
       peer.behaviourPenalty += 0.1
 
@@ -160,7 +199,8 @@ proc handleGraft*(g: GossipSub,
     # If they send us a graft before they send us a subscribe, what should
     # we do? For now, we add them to mesh but don't add them to gossipsub.
     if topic in g.topics:
-      if g.mesh.peers(topic) < g.parameters.dHigh or peer.outbound:
+      if g.mesh.peers(topic) < g.parameters.dHigh or
+          (peer.outbound and g.mesh.outboundPeers(topic) < g.parameters.dOut):
         # In the spec, there's no mention of DHi here, but implicitly, a
         # peer will be removed from the mesh on next rebalance, so we don't want
         # this peer to push someone else out
@@ -172,140 +212,148 @@ proc handleGraft*(g: GossipSub,
       else:
         trace "pruning grafting peer, mesh full",
           peer, topic, score = peer.score, mesh = g.mesh.peers(topic)
-        prunes.add(ControlPrune(
-          topicID: topic,
-          peers: g.peerExchangeList(topic),
-          backoff: g.parameters.pruneBackoff.seconds.uint64))
+        prunes.add(
+          ControlPrune(
+            topicID: topic,
+            peers: g.peerExchangeList(topic),
+            backoff: g.parameters.pruneBackoff.seconds.uint64,
+          )
+        )
+
+        let backoff = Moment.fromNow(g.parameters.pruneBackoff)
+
+        g.backingOff.mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] =
+          backoff
     else:
       trace "peer grafting topic we're not interested in", peer, topic
       # gossip 1.1, we do not send a control message prune anymore
 
   return prunes
 
-proc getPeers(prune: ControlPrune, peer: PubSubPeer): seq[(PeerId, Option[PeerRecord])] =
+proc getPeers(
+    prune: ControlPrune, peer: PubSubPeer
+): seq[(PeerId, Option[PeerRecord])] =
   var routingRecords: seq[(PeerId, Option[PeerRecord])]
   for record in prune.peers:
-    let peerRecord =
-      if record.signedPeerRecord.len == 0:
-        none(PeerRecord)
-      else:
-        let signedRecord = SignedPeerRecord.decode(record.signedPeerRecord)
-        if signedRecord.isErr:
-          trace "peer sent invalid SPR", peer, error=signedRecord.error
-          none(PeerRecord)
+    var peerRecord = none(PeerRecord)
+    if record.signedPeerRecord.len > 0:
+      SignedPeerRecord.decode(record.signedPeerRecord).toOpt().withValue(spr):
+        if record.peerId != spr.data.peerId:
+          trace "peer sent envelope with wrong public key", peer
         else:
-          if record.peerId != signedRecord.get().data.peerId:
-            trace "peer sent envelope with wrong public key", peer
-            none(PeerRecord)
-          else:
-            some(signedRecord.get().data)
+          peerRecord = some(spr.data)
+      else:
+        trace "peer sent invalid SPR", peer
 
     routingRecords.add((record.peerId, peerRecord))
 
   routingRecords
 
-
-proc handlePrune*(g: GossipSub, peer: PubSubPeer, prunes: seq[ControlPrune]) {.raises: [Defect].} =
+proc handlePrune*(g: GossipSub, peer: PubSubPeer, prunes: seq[ControlPrune]) =
   for prune in prunes:
-    let topic = prune.topicId
+    let topic = prune.topicID
 
-    trace "peer pruned topic", peer, topic
+    trace "peer pruned topicID", peer, topic
 
     # add peer backoff
     if prune.backoff > 0:
       let
         # avoid overflows and clamp to reasonable value
-        backoffSeconds = clamp(
-          prune.backoff + BackoffSlackTime,
-          0'u64,
-          1.days.seconds.uint64
-        )
+        backoffSeconds =
+          clamp(prune.backoff + BackoffSlackTime, 0'u64, 1.days.seconds.uint64)
         backoff = Moment.fromNow(backoffSeconds.int64.seconds)
         current = g.backingOff.getOrDefault(topic).getOrDefault(peer.peerId)
       if backoff > current:
-        g.backingOff
-          .mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] = backoff
+        g.backingOff.mgetOrPut(topic, initTable[PeerId, Moment]())[peer.peerId] =
+          backoff
 
     trace "pruning rpc received peer", peer, score = peer.score
     g.pruned(peer, topic, setBackoff = false)
     g.mesh.removePeer(topic, peer)
 
     if peer.score > g.parameters.gossipThreshold and prune.peers.len > 0 and
-      g.routingRecordsHandler.len > 0:
+        g.routingRecordsHandler.len > 0:
       let routingRecords = prune.getPeers(peer)
 
       for handler in g.routingRecordsHandler:
         handler(peer.peerId, topic, routingRecords)
 
-proc handleIHave*(g: GossipSub,
-                 peer: PubSubPeer,
-                 ihaves: seq[ControlIHave]): ControlIWant {.raises: [Defect].} =
+proc handleIHave*(
+    g: GossipSub, peer: PubSubPeer, ihaves: seq[ControlIHave]
+): ControlIWant =
   var res: ControlIWant
   if peer.score < g.parameters.gossipThreshold:
     trace "ihave: ignoring low score peer", peer, score = peer.score
   elif peer.iHaveBudget <= 0:
     trace "ihave: ignoring out of budget peer", peer, score = peer.score
   else:
-    # TODO review deduplicate algorithm
-    # * https://github.com/nim-lang/Nim/blob/5f46474555ee93306cce55342e81130c1da79a42/lib/pure/collections/sequtils.nim#L184
-    # * it's probably not efficient and might give preference to the first dupe
-    let deIhaves = ihaves.deduplicate()
-    for ihave in deIhaves:
-      trace "peer sent ihave",
-        peer, topic = ihave.topicId, msgs = ihave.messageIds
-      if ihave.topicId in g.mesh:
-        # also avoid duplicates here!
-        let deIhavesMsgs = ihave.messageIds.deduplicate()
-        for msgId in deIhavesMsgs:
-          if not g.hasSeen(msgId):
-            if peer.iHaveBudget > 0:
-              res.messageIds.add(msgId)
-              dec peer.iHaveBudget
-              trace "requested message via ihave", messageID=msgId
-            else:
+    for ihave in ihaves:
+      trace "peer sent ihave", peer, topicID = ihave.topicID, msgs = ihave.messageIDs
+      if ihave.topicID in g.topics:
+        for msgId in ihave.messageIDs:
+          if not g.hasSeen(g.salt(msgId)):
+            if peer.iHaveBudget <= 0:
               break
+            elif msgId notin res.messageIDs:
+              res.messageIDs.add(msgId)
+              dec peer.iHaveBudget
+              trace "requested message via ihave", messageID = msgId
     # shuffling res.messageIDs before sending it out to increase the likelihood
     # of getting an answer if the peer truncates the list due to internal size restrictions.
-    g.rng.shuffle(res.messageIds)
+    g.rng.shuffle(res.messageIDs)
     return res
 
-proc handleIWant*(g: GossipSub,
-                 peer: PubSubPeer,
-                 iwants: seq[ControlIWant]): seq[Message] {.raises: [Defect].} =
-  var messages: seq[Message]
+proc handleIDontWant*(g: GossipSub, peer: PubSubPeer, iDontWants: seq[ControlIWant]) =
+  for dontWant in iDontWants:
+    for messageId in dontWant.messageIDs:
+      if peer.iDontWants[^1].len > 1000:
+        break
+      peer.iDontWants[^1].incl(g.salt(messageId))
+
+proc handleIWant*(
+    g: GossipSub, peer: PubSubPeer, iwants: seq[ControlIWant]
+): seq[Message] =
+  var
+    messages: seq[Message]
+    invalidRequests = 0
   if peer.score < g.parameters.gossipThreshold:
     trace "iwant: ignoring low score peer", peer, score = peer.score
-  elif peer.iWantBudget <= 0:
-    trace "iwant: ignoring out of budget peer", peer, score = peer.score
   else:
-    let deIwants = iwants.deduplicate()
-    for iwant in deIwants:
-      let deIwantsMsgs = iwant.messageIds.deduplicate()
-      for mid in deIwantsMsgs:
+    for iwant in iwants:
+      for mid in iwant.messageIDs:
         trace "peer sent iwant", peer, messageID = mid
-        let msg = g.mcache.get(mid)
-        if msg.isSome:
-          libp2p_gossipsub_mcache_hit.observe(1)
-          # avoid spam
-          if peer.iWantBudget > 0:
-            messages.add(msg.get())
-            dec peer.iWantBudget
-          else:
-            break
-        else:
-          libp2p_gossipsub_mcache_hit.observe(0)
+        # canAskIWant will only return true once for a specific message
+        if not peer.canAskIWant(mid):
+          libp2p_gossipsub_received_iwants.inc(1, labelValues = ["notsent"])
+
+          invalidRequests.inc()
+          if invalidRequests > 20:
+            libp2p_gossipsub_received_iwants.inc(1, labelValues = ["skipped"])
+            return messages
+          continue
+        let msg = g.mcache.get(mid).valueOr:
+          libp2p_gossipsub_received_iwants.inc(1, labelValues = ["unknown"])
+          continue
+        libp2p_gossipsub_received_iwants.inc(1, labelValues = ["correct"])
+        messages.add(msg)
   return messages
 
-proc commitMetrics(metrics: var MeshMetrics) {.raises: [Defect].} =
+proc commitMetrics(metrics: var MeshMetrics) =
   libp2p_gossipsub_low_peers_topics.set(metrics.lowPeersTopics)
   libp2p_gossipsub_no_peers_topics.set(metrics.noPeersTopics)
   libp2p_gossipsub_under_dout_topics.set(metrics.underDoutTopics)
   libp2p_gossipsub_healthy_peers_topics.set(metrics.healthyPeersTopics)
-  libp2p_gossipsub_peers_per_topic_gossipsub.set(metrics.otherPeersPerTopicGossipsub, labelValues = ["other"])
-  libp2p_gossipsub_peers_per_topic_fanout.set(metrics.otherPeersPerTopicFanout, labelValues = ["other"])
-  libp2p_gossipsub_peers_per_topic_mesh.set(metrics.otherPeersPerTopicMesh, labelValues = ["other"])
+  libp2p_gossipsub_peers_per_topic_gossipsub.set(
+    metrics.otherPeersPerTopicGossipsub, labelValues = ["other"]
+  )
+  libp2p_gossipsub_peers_per_topic_fanout.set(
+    metrics.otherPeersPerTopicFanout, labelValues = ["other"]
+  )
+  libp2p_gossipsub_peers_per_topic_mesh.set(
+    metrics.otherPeersPerTopicMesh, labelValues = ["other"]
+  )
 
-proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil) {.raises: [Defect].} =
+proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil) =
   logScope:
     topic
     mesh = g.mesh.peers(topic)
@@ -318,25 +366,25 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
   var
     prunes, grafts: seq[PubSubPeer]
     npeers = g.mesh.peers(topic)
+    nOutPeers = g.mesh.outboundPeers(topic)
     defaultMesh: HashSet[PubSubPeer]
     backingOff = g.backingOff.getOrDefault(topic)
 
-  if npeers  < g.parameters.dLow:
+  if npeers < g.parameters.dLow:
     trace "replenishing mesh", peers = npeers
     # replenish the mesh if we're below Dlo
 
     var
       candidates: seq[PubSubPeer]
       currentMesh = addr defaultMesh
-    g.mesh.withValue(topic, v): currentMesh = v
+    g.mesh.withValue(topic, v):
+      currentMesh = v
     g.gossipsub.withValue(topic, peerList):
       for it in peerList[]:
-        if
-            it.connected and
+        if it.connected and
             # avoid negative score peers
-            it.score >= 0.0 and
-            it notin currentMesh[] and
-            # don't pick explicit peers
+            it.score >= 0.0 and it notin currentMesh[] and
+            # don't pick direct peers
             it.peerId notin g.parameters.directPeers and
             # and avoid peers we are backing off
             it.peerId notin backingOff:
@@ -359,24 +407,22 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
           g.grafted(peer, topic)
           g.fanout.removePeer(topic, peer)
           grafts &= peer
-
-  else:
+  elif nOutPeers < g.parameters.dOut:
     trace "replenishing mesh outbound quota", peers = g.mesh.peers(topic)
 
     var
       candidates: seq[PubSubPeer]
       currentMesh = addr defaultMesh
-    g.mesh.withValue(topic, v): currentMesh = v
+    g.mesh.withValue(topic, v):
+      currentMesh = v
     g.gossipsub.withValue(topic, peerList):
       for it in peerList[]:
-        if
-            it.connected and
-            # get only outbound ones
-            it.outbound and
-            it notin currentMesh[] and
+        if it.connected and
+        # get only outbound ones
+        it.outbound and it notin currentMesh[] and
             # avoid negative score peers
             it.score >= 0.0 and
-            # don't pick explicit peers
+            # don't pick direct peers
             it.peerId notin g.parameters.directPeers and
             # and avoid peers we are backing off
             it.peerId notin backingOff:
@@ -388,8 +434,8 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
     # sort peers by score, high score first, we are grafting
     candidates.sort(byScore, SortOrder.Descending)
 
-    # Graft peers so we reach a count of D
-    candidates.setLen(min(candidates.len, g.parameters.dOut))
+    # Graft outgoing peers so we reach a count of dOut
+    candidates.setLen(min(candidates.len, g.parameters.dOut - nOutPeers))
 
     trace "grafting outbound peers", topic, peers = candidates.len
 
@@ -399,7 +445,6 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
         g.fanout.removePeer(topic, peer)
         grafts &= peer
 
-
   # get again npeers after possible grafts
   npeers = g.mesh.peers(topic)
   if npeers > g.parameters.dHigh:
@@ -410,9 +455,15 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
         libp2p_gossipsub_above_dhigh_condition.inc(labelValues = ["other"])
 
     # prune peers if we've gone over Dhi
-    prunes = toSeq(try: g.mesh[topic] except KeyError: raiseAssert "have peers")
+    prunes = toSeq(
+      try:
+        g.mesh[topic]
+      except KeyError:
+        raiseAssert "have peers"
+    )
     # avoid pruning peers we are currently grafting in this heartbeat
-    prunes.keepIf do (x: PubSubPeer) -> bool: x notin grafts
+    prunes.keepIf do(x: PubSubPeer) -> bool:
+      x notin grafts
 
     # shuffle anyway, score might be not used
     g.rng.shuffle(prunes)
@@ -460,7 +511,12 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
 
   # opportunistic grafting, by spec mesh should not be empty...
   if g.mesh.peers(topic) > 1:
-    var peers = toSeq(try: g.mesh[topic] except KeyError: raiseAssert "have peers")
+    var peers = toSeq(
+      try:
+        g.mesh[topic]
+      except KeyError:
+        raiseAssert "have peers"
+    )
     # grafting so high score has priority
     peers.sort(byScore, SortOrder.Descending)
     let medianIdx = peers.len div 2
@@ -471,14 +527,13 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
       var
         avail: seq[PubSubPeer]
         currentMesh = addr defaultMesh
-      g.mesh.withValue(topic, v): currentMesh = v
+      g.mesh.withValue(topic, v):
+        currentMesh = v
       g.gossipsub.withValue(topic, peerList):
         for it in peerList[]:
-          if
-              # avoid negative score peers
-              it.score >= median.score and
-              it notin currentMesh[] and
-              # don't pick explicit peers
+          if it.score >= median.score and # avoid negative score peers
+          it notin currentMesh[] and
+              # don't pick direct peers
               it.peerId notin g.parameters.directPeers and
               # and avoid peers we are backing off
               it.peerId notin backingOff:
@@ -504,17 +559,23 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
       inc metrics[].healthyPeersTopics
 
     var meshPeers = toSeq(g.mesh.getOrDefault(topic, initHashSet[PubSubPeer]()))
-    meshPeers.keepIf do (x: PubSubPeer) -> bool: x.outbound
+    meshPeers.keepIf do(x: PubSubPeer) -> bool:
+      x.outbound
     if meshPeers.len < g.parameters.dOut:
       inc metrics[].underDoutTopics
 
     if g.knownTopics.contains(topic):
-      libp2p_gossipsub_peers_per_topic_gossipsub
-        .set(g.gossipsub.peers(topic).int64, labelValues = [topic])
-      libp2p_gossipsub_peers_per_topic_fanout
-        .set(g.fanout.peers(topic).int64, labelValues = [topic])
-      libp2p_gossipsub_peers_per_topic_mesh
-        .set(g.mesh.peers(topic).int64, labelValues = [topic])
+      libp2p_gossipsub_peers_per_topic_gossipsub.set(
+        g.gossipsub.peers(topic).int64, labelValues = [topic]
+      )
+
+      libp2p_gossipsub_peers_per_topic_fanout.set(
+        g.fanout.peers(topic).int64, labelValues = [topic]
+      )
+
+      libp2p_gossipsub_peers_per_topic_mesh.set(
+        g.mesh.peers(topic).int64, labelValues = [topic]
+      )
     else:
       metrics[].otherPeersPerTopicGossipsub += g.gossipsub.peers(topic).int64
       metrics[].otherPeersPerTopicFanout += g.fanout.peers(topic).int64
@@ -524,17 +585,27 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
 
   # Send changes to peers after table updates to avoid stale state
   if grafts.len > 0:
-    let graft = RPCMsg(control: some(ControlMessage(graft: @[ControlGraft(topicID: topic)])))
-    g.broadcast(grafts, graft)
+    let graft =
+      RPCMsg(control: some(ControlMessage(graft: @[ControlGraft(topicID: topic)])))
+    g.broadcast(grafts, graft, isHighPriority = true)
   if prunes.len > 0:
-    let prune = RPCMsg(control: some(ControlMessage(
-      prune: @[ControlPrune(
-        topicID: topic,
-        peers: g.peerExchangeList(topic),
-        backoff: g.parameters.pruneBackoff.seconds.uint64)])))
-    g.broadcast(prunes, prune)
+    let prune = RPCMsg(
+      control: some(
+        ControlMessage(
+          prune:
+            @[
+              ControlPrune(
+                topicID: topic,
+                peers: g.peerExchangeList(topic),
+                backoff: g.parameters.pruneBackoff.seconds.uint64,
+              )
+            ]
+        )
+      )
+    )
+    g.broadcast(prunes, prune, isHighPriority = true)
 
-proc dropFanoutPeers*(g: GossipSub) {.raises: [Defect].} =
+proc dropFanoutPeers*(g: GossipSub) =
   # drop peers that we haven't published to in
   # GossipSubFanoutTTL seconds
   let now = Moment.now()
@@ -547,23 +618,25 @@ proc dropFanoutPeers*(g: GossipSub) {.raises: [Defect].} =
   for topic in drops:
     g.lastFanoutPubSub.del topic
 
-proc replenishFanout*(g: GossipSub, topic: string) {.raises: [Defect].} =
+proc replenishFanout*(g: GossipSub, topic: string) =
   ## get fanout peers for a topic
-  logScope: topic
+  logScope:
+    topic
   trace "about to replenish fanout"
 
-  let currentMesh = g.mesh.getOrDefault(topic)
   if g.fanout.peers(topic) < g.parameters.dLow:
+    let currentMesh = g.mesh.getOrDefault(topic)
     trace "replenishing fanout", peers = g.fanout.peers(topic)
     for peer in g.gossipsub.getOrDefault(topic):
-      if peer in currentMesh: continue
+      if peer in currentMesh:
+        continue
       if g.fanout.addPeer(topic, peer):
         if g.fanout.peers(topic) == g.parameters.d:
           break
 
   trace "fanout replenished with peers", peers = g.fanout.peers(topic)
 
-proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] {.raises: [Defect].} =
+proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] =
   ## gossip iHave messages to peers
   ##
 
@@ -571,14 +644,14 @@ proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] {.raises:
   var control: Table[PubSubPeer, ControlMessage]
 
   let topics = toHashSet(toSeq(g.mesh.keys)) + toHashSet(toSeq(g.fanout.keys))
-  trace "getting gossip peers (iHave)", ntopics=topics.len
+  trace "getting gossip peers (iHave)", ntopics = topics.len
   for topic in topics:
     if topic notin g.gossipsub:
-      trace "topic not in gossip array, skipping", topicID = topic
+      trace "topic not in gossip array, skipping", topic = topic
       continue
 
     let mids = g.mcache.window(topic)
-    if not(mids.len > 0):
+    if not (mids.len > 0):
       trace "no messages to emit"
       continue
 
@@ -586,7 +659,7 @@ proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] {.raises:
 
     cacheWindowSize += midsSeq.len
 
-    trace "got messages to emit", size=midsSeq.len
+    trace "got messages to emit", size = midsSeq.len
 
     # not in spec
     # similar to rust: https://github.com/sigp/rust-libp2p/blob/f53d02bc873fef2bf52cd31e3d5ce366a41d8a8c/protocols/gossipsub/src/behaviour.rs#L2101
@@ -602,15 +675,14 @@ proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] {.raises:
       gossipPeers = mesh + fanout
     var allPeers = toSeq(g.gossipsub.getOrDefault(topic))
 
-    allPeers.keepIf do (x: PubSubPeer) -> bool:
-      x.peerId notin g.parameters.directPeers and
-      x notin gossipPeers and
-      x.score >= g.parameters.gossipThreshold
+    allPeers.keepIf do(x: PubSubPeer) -> bool:
+      x.peerId notin g.parameters.directPeers and x notin gossipPeers and
+        x.score >= g.parameters.gossipThreshold
 
-    var target = g.parameters.dLazy
-    let factor = (g.parameters.gossipFactor.float * allPeers.len.float).int
-    if factor > target:
-      target = min(factor, allPeers.len)
+    # https://github.com/libp2p/specs/blob/98c5aa9421703fc31b0833ad8860a55db15be063/pubsub/gossipsub/gossipsub-v1.1.md#adaptive-gossip-dissemination
+    let
+      factor = (g.parameters.gossipFactor.float * allPeers.len.float).int
+      target = max(g.parameters.dLazy, factor)
 
     if target < allPeers.len:
       g.rng.shuffle(allPeers)
@@ -618,70 +690,85 @@ proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] {.raises:
 
     for peer in allPeers:
       control.mgetOrPut(peer, ControlMessage()).ihave.add(ihave)
+      for msgId in ihave.messageIDs:
+        peer.sentIHaves[^1].incl(msgId)
 
   libp2p_gossipsub_cache_window_size.set(cacheWindowSize.int64)
 
   return control
 
-proc onHeartbeat(g: GossipSub) {.raises: [Defect].} =
-    # reset IWANT budget
-    # reset IHAVE cap
+proc onHeartbeat(g: GossipSub) =
+  # reset IWANT budget
+  # reset IHAVE cap
+  block:
+    for peer in g.peers.values:
+      peer.sentIHaves.addFirst(default(HashSet[MessageId]))
+      if peer.sentIHaves.len > g.parameters.historyLength:
+        discard peer.sentIHaves.popLast()
+      peer.iDontWants.addFirst(default(HashSet[SaltedId]))
+      if peer.iDontWants.len > g.parameters.historyLength:
+        discard peer.iDontWants.popLast()
+      peer.iHaveBudget = IHavePeerBudget
+      peer.pingBudget = PingsPeerBudget
+
+  var meshMetrics = MeshMetrics()
+
+  for t in toSeq(g.topics.keys):
+    # remove expired backoffs
     block:
-      for peer in g.peers.values:
-        peer.iWantBudget = IWantPeerBudget
-        peer.iHaveBudget = IHavePeerBudget
+      handleBackingOff(g.backingOff, t)
 
-    var meshMetrics = MeshMetrics()
+    # prune every negative score peer
+    # do this before relance
+    # in order to avoid grafted -> pruned in the same cycle
+    let meshPeers = g.mesh.getOrDefault(t)
+    var prunes: seq[PubSubPeer]
+    for peer in meshPeers:
+      if peer.score < 0.0:
+        trace "pruning negative score peer", peer, score = peer.score
+        g.pruned(peer, t)
+        g.mesh.removePeer(t, peer)
+        prunes &= peer
+    if prunes.len > 0:
+      let prune = RPCMsg(
+        control: some(
+          ControlMessage(
+            prune:
+              @[
+                ControlPrune(
+                  topicID: t,
+                  peers: g.peerExchangeList(t),
+                  backoff: g.parameters.pruneBackoff.seconds.uint64,
+                )
+              ]
+          )
+        )
+      )
+      g.broadcast(prunes, prune, isHighPriority = true)
 
-    for t in toSeq(g.topics.keys):
-      # remove expired backoffs
-      block:
-        handleBackingOff(g.backingOff, t)
+    # pass by ptr in order to both signal we want to update metrics
+    # and as well update the struct for each topic during this iteration
+    g.rebalanceMesh(t, addr meshMetrics)
 
-      # prune every negative score peer
-      # do this before relance
-      # in order to avoid grafted -> pruned in the same cycle
-      let meshPeers = g.mesh.getOrDefault(t)
-      var prunes: seq[PubSubPeer]
-      for peer in meshPeers:
-        if peer.score < 0.0:
-          trace "pruning negative score peer", peer, score = peer.score
-          g.pruned(peer, t)
-          g.mesh.removePeer(t, peer)
-          prunes &= peer
-      if prunes.len > 0:
-        let prune = RPCMsg(control: some(ControlMessage(
-          prune: @[ControlPrune(
-            topicID: t,
-            peers: g.peerExchangeList(t),
-            backoff: g.parameters.pruneBackoff.seconds.uint64)])))
-        g.broadcast(prunes, prune)
+  commitMetrics(meshMetrics)
 
-      # pass by ptr in order to both signal we want to update metrics
-      # and as well update the struct for each topic during this iteration
-      g.rebalanceMesh(t, addr meshMetrics)
+  g.dropFanoutPeers()
 
-    commitMetrics(meshMetrics)
+  # replenish known topics to the fanout
+  for t in toSeq(g.fanout.keys):
+    g.replenishFanout(t)
 
-    g.dropFanoutPeers()
+  let peers = g.getGossipPeers()
+  for peer, control in peers:
+    # only ihave from here
+    for ihave in control.ihave:
+      if g.knownTopics.contains(ihave.topicID):
+        libp2p_pubsub_broadcast_ihave.inc(labelValues = [ihave.topicID])
+      else:
+        libp2p_pubsub_broadcast_ihave.inc(labelValues = ["generic"])
+    g.send(peer, RPCMsg(control: some(control)), isHighPriority = true)
 
-    # replenish known topics to the fanout
-    for t in toSeq(g.fanout.keys):
-      g.replenishFanout(t)
-
-    let peers = g.getGossipPeers()
-    for peer, control in peers:
-      # only ihave from here
-      for ihave in control.ihave:
-        if g.knownTopics.contains(ihave.topicId):
-          libp2p_pubsub_broadcast_ihave.inc(labelValues = [ihave.topicId])
-        else:
-          libp2p_pubsub_broadcast_ihave.inc(labelValues = ["generic"])
-      g.send(peer, RPCMsg(control: some(control)))
-
-    g.mcache.shift() # shift the cache
-
-# {.pop.} # raises [Defect]
+  g.mcache.shift() # shift the cache
 
 proc heartbeat*(g: GossipSub) {.async.} =
   heartbeat "GossipSub", g.parameters.heartbeatInterval:

libp2p/protocols/pubsub/gossipsub/scoring.nim

@@ -7,29 +7,70 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[tables, sets, options]
+import std/[tables, sets]
 import chronos, chronicles, metrics
+import chronos/ratelimit
 import "."/[types]
 import ".."/[pubsubpeer]
-import "../../.."/[peerid, multiaddress, utility, switch, utils/heartbeat]
+import ../rpc/messages
+import "../../.."/[peerid, multiaddress, switch, utils/heartbeat]
+import ../pubsub
 
 logScope:
   topics = "libp2p gossipsub"
 
-declareGauge(libp2p_gossipsub_peers_scores, "the scores of the peers in gossipsub", labels = ["agent"])
-declareCounter(libp2p_gossipsub_bad_score_disconnection, "the number of peers disconnected by gossipsub", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_firstMessageDeliveries, "Detailed gossipsub scoring metric", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_meshMessageDeliveries, "Detailed gossipsub scoring metric", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_meshFailurePenalty, "Detailed gossipsub scoring metric", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_invalidMessageDeliveries, "Detailed gossipsub scoring metric", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_appScore, "Detailed gossipsub scoring metric", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_behaviourPenalty, "Detailed gossipsub scoring metric", labels = ["agent"])
-declareGauge(libp2p_gossipsub_peers_score_colocationFactor, "Detailed gossipsub scoring metric", labels = ["agent"])
+declareGauge(
+  libp2p_gossipsub_peers_scores,
+  "the scores of the peers in gossipsub",
+  labels = ["agent"],
+)
+declareCounter(
+  libp2p_gossipsub_bad_score_disconnection,
+  "the number of peers disconnected by gossipsub",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_firstMessageDeliveries,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_meshMessageDeliveries,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_meshFailurePenalty,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_invalidMessageDeliveries,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_appScore,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_behaviourPenalty,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declareGauge(
+  libp2p_gossipsub_peers_score_colocationFactor,
+  "Detailed gossipsub scoring metric",
+  labels = ["agent"],
+)
+declarePublicCounter(
+  libp2p_gossipsub_peers_rate_limit_hits,
+  "The number of times peers were above their rate limit",
+  labels = ["agent"],
+)
 
 proc init*(_: type[TopicParams]): TopicParams =
   TopicParams(
@@ -49,21 +90,24 @@ proc init*(_: type[TopicParams]): TopicParams =
     meshFailurePenaltyWeight: -1.0,
     meshFailurePenaltyDecay: 0.5,
     invalidMessageDeliveriesWeight: -1.0,
-    invalidMessageDeliveriesDecay: 0.5
+    invalidMessageDeliveriesDecay: 0.5,
   )
 
 proc withPeerStats*(
     g: GossipSub,
     peerId: PeerId,
-    action: proc (stats: var PeerStats) {.gcsafe, raises: [Defect].}) =
+    action: proc(stats: var PeerStats) {.gcsafe, raises: [].},
+) =
   ## Add or update peer statistics for a particular peer id - the statistics
   ## are retained across multiple connections until they expire
-  g.peerStats.withValue(peerId, stats) do:
+  g.peerStats.withValue(peerId, stats):
     action(stats[])
   do:
-    action(g.peerStats.mgetOrPut(peerId, PeerStats(
-      expire: Moment.now() + g.parameters.retainScore
-    )))
+    action(
+      g.peerStats.mgetOrPut(
+        peerId, PeerStats(expire: Moment.now() + g.parameters.retainScore)
+      )
+    )
 
 func `/`(a, b: Duration): float64 =
   let
@@ -71,42 +115,34 @@ func `/`(a, b: Duration): float64 =
     fb = float64(b.nanoseconds)
   fa / fb
 
-func byScore*(x,y: PubSubPeer): int = system.cmp(x.score, y.score)
+func byScore*(x, y: PubSubPeer): int =
+  system.cmp(x.score, y.score)
 
 proc colocationFactor(g: GossipSub, peer: PubSubPeer): float64 =
-  if peer.address.isNone():
-    0.0
+  let address = peer.address.valueOr:
+    return 0.0
+
+  g.peersInIP.mgetOrPut(address, initHashSet[PeerId]()).incl(peer.peerId)
+  let ipPeers = g.peersInIP.getOrDefault(address).len().float64
+  if ipPeers > g.parameters.ipColocationFactorThreshold:
+    trace "colocationFactor over threshold", peer, address, ipPeers
+    let over = ipPeers - g.parameters.ipColocationFactorThreshold
+    over * over
   else:
-    let
-      address = peer.address.get()
-    g.peersInIP.mgetOrPut(address, initHashSet[PeerId]()).incl(peer.peerId)
-    let
-      ipPeers = g.peersInIP.getOrDefault(address).len().float64
-    if ipPeers > g.parameters.ipColocationFactorThreshold:
-      trace "colocationFactor over threshold", peer, address, ipPeers
-      let over = ipPeers - g.parameters.ipColocationFactorThreshold
-      over * over
-    else:
-      0.0
-
-{.pop.}
-
-proc disconnectPeer(g: GossipSub, peer: PubSubPeer) {.async.} =
-  let agent =
-    when defined(libp2p_agents_metrics):
-      if peer.shortAgent.len > 0:
-        peer.shortAgent
-      else:
-        "unknown"
-    else:
-      "unknown"
-  libp2p_gossipsub_bad_score_disconnection.inc(labelValues = [agent])
+    0.0
 
+proc disconnectPeer*(g: GossipSub, peer: PubSubPeer) {.async.} =
   try:
     await g.switch.disconnect(peer.peerId)
   except CatchableError as exc: # Never cancelled
     trace "Failed to close connection", peer, error = exc.name, msg = exc.msg
 
+proc disconnectIfBadScorePeer*(g: GossipSub, peer: PubSubPeer, score: float64) =
+  if g.parameters.disconnectBadPeers and score < g.parameters.graylistThreshold and
+      peer.peerId notin g.parameters.directPeers:
+    debug "disconnecting bad score peer", peer, score = peer.score
+    asyncSpawn(g.disconnectPeer(peer))
+    libp2p_gossipsub_bad_score_disconnection.inc(labelValues = [peer.getAgent()])
 
 proc updateScores*(g: GossipSub) = # avoid async
   ## https://github.com/libp2p/specs/blob/master/pubsub/gossipsub/gossipsub-v1.1.md#the-score-function
@@ -118,7 +154,7 @@ proc updateScores*(g: GossipSub) = # avoid async
 
   for peerId, stats in g.peerStats.mpairs:
     let peer = g.peers.getOrDefault(peerId)
-    if isNil(peer) or not(peer.connected):
+    if isNil(peer) or not (peer.connected):
       if now > stats.expire:
         evicting.add(peerId)
         trace "evicted peer from memory", peer = peerId
@@ -129,7 +165,7 @@ proc updateScores*(g: GossipSub) = # avoid async
     var
       n_topics = 0
       is_grafted = 0
-      score = 0.0
+      scoreAcc = 0.0 # accumulates the peer score
 
     # Per topic
     for topic, topicParams in g.topicParams:
@@ -155,12 +191,14 @@ proc updateScores*(g: GossipSub) = # avoid async
         else:
           info.meshMessageDeliveriesActive = false
 
-        topicScore += info.firstMessageDeliveries * topicParams.firstMessageDeliveriesWeight
+        topicScore +=
+          info.firstMessageDeliveries * topicParams.firstMessageDeliveriesWeight
         trace "p2", peer, p2 = info.firstMessageDeliveries, topic, topicScore
 
         if info.meshMessageDeliveriesActive:
           if info.meshMessageDeliveries < topicParams.meshMessageDeliveriesThreshold:
-            let deficit = topicParams.meshMessageDeliveriesThreshold - info.meshMessageDeliveries
+            let deficit =
+              topicParams.meshMessageDeliveriesThreshold - info.meshMessageDeliveries
             let p3 = deficit * deficit
             trace "p3", peer, p3, topic, topicScore
             topicScore += p3 * topicParams.meshMessageDeliveriesWeight
@@ -168,26 +206,34 @@ proc updateScores*(g: GossipSub) = # avoid async
         topicScore += info.meshFailurePenalty * topicParams.meshFailurePenaltyWeight
         trace "p3b", peer, p3b = info.meshFailurePenalty, topic, topicScore
 
-        topicScore += info.invalidMessageDeliveries * info.invalidMessageDeliveries * topicParams.invalidMessageDeliveriesWeight
-        trace "p4", p4 = info.invalidMessageDeliveries * info.invalidMessageDeliveries, topic, topicScore
+        topicScore +=
+          info.invalidMessageDeliveries * info.invalidMessageDeliveries *
+          topicParams.invalidMessageDeliveriesWeight
+        trace "p4",
+          peer,
+          p4 = info.invalidMessageDeliveries * info.invalidMessageDeliveries,
+          topic,
+          topicScore
 
-        trace "updated peer topic's scores", peer, topic, info, topicScore
+        scoreAcc += topicScore * topicParams.topicWeight
 
-        score += topicScore * topicParams.topicWeight
+        trace "updated peer topic's scores",
+          peer, scoreAcc, topic, info, topicScore, topicWeight = topicParams.topicWeight
 
       # Score metrics
-      let agent =
-        when defined(libp2p_agents_metrics):
-          if peer.shortAgent.len > 0:
-            peer.shortAgent
-          else:
-            "unknown"
-        else:
-          "unknown"
-      libp2p_gossipsub_peers_score_firstMessageDeliveries.inc(info.firstMessageDeliveries, labelValues = [agent])
-      libp2p_gossipsub_peers_score_meshMessageDeliveries.inc(info.meshMessageDeliveries, labelValues = [agent])
-      libp2p_gossipsub_peers_score_meshFailurePenalty.inc(info.meshFailurePenalty, labelValues = [agent])
-      libp2p_gossipsub_peers_score_invalidMessageDeliveries.inc(info.invalidMessageDeliveries, labelValues = [agent])
+      let agent = peer.getAgent()
+      libp2p_gossipsub_peers_score_firstMessageDeliveries.inc(
+        info.firstMessageDeliveries, labelValues = [agent]
+      )
+      libp2p_gossipsub_peers_score_meshMessageDeliveries.inc(
+        info.meshMessageDeliveries, labelValues = [agent]
+      )
+      libp2p_gossipsub_peers_score_meshFailurePenalty.inc(
+        info.meshFailurePenalty, labelValues = [agent]
+      )
+      libp2p_gossipsub_peers_score_invalidMessageDeliveries.inc(
+        info.invalidMessageDeliveries, labelValues = [agent]
+      )
 
       # Score decay
       info.firstMessageDeliveries *= topicParams.firstMessageDeliveriesDecay
@@ -210,34 +256,45 @@ proc updateScores*(g: GossipSub) = # avoid async
       # commit our changes, mgetOrPut does NOT work as wanted with value types (lent?)
       stats.topicInfos[topic] = info
 
-    score += peer.appScore * g.parameters.appSpecificWeight
-
+    scoreAcc += peer.appScore * g.parameters.appSpecificWeight
+    trace "appScore",
+      peer,
+      scoreAcc,
+      appScore = peer.appScore,
+      appSpecificWeight = g.parameters.appSpecificWeight
 
     # The value of the parameter is the square of the counter and is mixed with a negative weight.
-    score += peer.behaviourPenalty * peer.behaviourPenalty * g.parameters.behaviourPenaltyWeight
+    scoreAcc +=
+      peer.behaviourPenalty * peer.behaviourPenalty * g.parameters.behaviourPenaltyWeight
+    trace "behaviourPenalty",
+      peer,
+      scoreAcc,
+      behaviourPenalty = peer.behaviourPenalty,
+      behaviourPenaltyWeight = g.parameters.behaviourPenaltyWeight
 
     let colocationFactor = g.colocationFactor(peer)
-    score += colocationFactor * g.parameters.ipColocationFactorWeight
-
+    scoreAcc += colocationFactor * g.parameters.ipColocationFactorWeight
+    trace "colocationFactor",
+      peer,
+      scoreAcc,
+      colocationFactor,
+      ipColocationFactorWeight = g.parameters.ipColocationFactorWeight
     # Score metrics
-    let agent =
-      when defined(libp2p_agents_metrics):
-        if peer.shortAgent.len > 0:
-          peer.shortAgent
-        else:
-          "unknown"
-      else:
-        "unknown"
+    let agent = peer.getAgent()
     libp2p_gossipsub_peers_score_appScore.inc(peer.appScore, labelValues = [agent])
-    libp2p_gossipsub_peers_score_behaviourPenalty.inc(peer.behaviourPenalty, labelValues = [agent])
-    libp2p_gossipsub_peers_score_colocationFactor.inc(colocationFactor, labelValues = [agent])
+    libp2p_gossipsub_peers_score_behaviourPenalty.inc(
+      peer.behaviourPenalty, labelValues = [agent]
+    )
+    libp2p_gossipsub_peers_score_colocationFactor.inc(
+      colocationFactor, labelValues = [agent]
+    )
 
     # decay behaviourPenalty
     peer.behaviourPenalty *= g.parameters.behaviourPenaltyDecay
     if peer.behaviourPenalty < g.parameters.decayToZero:
       peer.behaviourPenalty = 0
 
-    peer.score = score
+    peer.score = scoreAcc
 
     # copy into stats the score to keep until expired
     stats.score = peer.score
@@ -245,13 +302,10 @@ proc updateScores*(g: GossipSub) = # avoid async
     stats.behaviourPenalty = peer.behaviourPenalty
     stats.expire = now + g.parameters.retainScore # refresh expiration
 
-    trace "updated peer's score", peer, score = peer.score, n_topics, is_grafted
-
-    if g.parameters.disconnectBadPeers and stats.score < g.parameters.graylistThreshold and
-        peer.peerId notin g.parameters.directPeers:
-      debug "disconnecting bad score peer", peer, score = peer.score
-      asyncSpawn(try: g.disconnectPeer(peer) except Exception as exc: raiseAssert exc.msg)
+    trace "updated (accumulated) peer's score",
+      peer, peerScore = peer.score, n_topics, is_grafted
 
+    g.disconnectIfBadScorePeer(peer, stats.score)
     libp2p_gossipsub_peers_scores.inc(peer.score, labelValues = [agent])
 
   for peer in evicting:
@@ -264,43 +318,54 @@ proc scoringHeartbeat*(g: GossipSub) {.async.} =
     trace "running scoring heartbeat", instance = cast[int](g)
     g.updateScores()
 
-proc punishInvalidMessage*(g: GossipSub, peer: PubSubPeer, topics: seq[string]) =
-  for tt in topics:
-    let t = tt
-    if t notin g.topics:
-      continue
+proc punishInvalidMessage*(g: GossipSub, peer: PubSubPeer, msg: Message) {.async.} =
+  let uselessAppBytesNum = msg.data.len
+  peer.overheadRateLimitOpt.withValue(overheadRateLimit):
+    if not overheadRateLimit.tryConsume(uselessAppBytesNum):
+      debug "Peer sent invalid message and it's above rate limit",
+        peer, uselessAppBytesNum
+      libp2p_gossipsub_peers_rate_limit_hits.inc(labelValues = [peer.getAgent()])
+        # let's just measure at the beginning for test purposes.
+      if g.parameters.disconnectPeerAboveRateLimit:
+        await g.disconnectPeer(peer)
+        raise newException(
+          PeerRateLimitError, "Peer disconnected because it's above rate limit."
+        )
 
-    let tt = t
-    # update stats
-    g.withPeerStats(peer.peerId) do (stats: var PeerStats):
-      stats.topicInfos.mgetOrPut(tt, TopicInfo()).invalidMessageDeliveries += 1
+  let topic = msg.topic
+  if topic notin g.topics:
+    return
+
+  # update stats
+  g.withPeerStats(peer.peerId) do(stats: var PeerStats):
+    stats.topicInfos.mgetOrPut(topic, TopicInfo()).invalidMessageDeliveries += 1
 
 proc addCapped*[T](stat: var T, diff, cap: T) =
   stat += min(diff, cap - stat)
 
 proc rewardDelivered*(
-    g: GossipSub, peer: PubSubPeer, topics: openArray[string], first: bool, delay = ZeroDuration) =
-  for tt in topics:
-    let t = tt
-    if t notin g.topics:
-      continue
+    g: GossipSub, peer: PubSubPeer, topic: string, first: bool, delay = ZeroDuration
+) =
+  if topic notin g.topics:
+    return
 
-    let tt = t
-    let topicParams = g.topicParams.mgetOrPut(t, TopicParams.init())
-                                            # if in mesh add more delivery score
+  let topicParams = g.topicParams.mgetOrPut(topic, TopicParams.init())
+    # if in mesh add more delivery score
 
-    if delay > topicParams.meshMessageDeliveriesWindow:
-      # Too old
-      continue
+  if delay > topicParams.meshMessageDeliveriesWindow:
+    # Too old
+    return
 
-    g.withPeerStats(peer.peerId) do (stats: var PeerStats):
-      stats.topicInfos.withValue(tt, tstats):
-        if tstats[].inMesh:
-          if first:
-            tstats[].firstMessageDeliveries.addCapped(
-              1, topicParams.firstMessageDeliveriesCap)
+  g.withPeerStats(peer.peerId) do(stats: var PeerStats):
+    stats.topicInfos.withValue(topic, tstats):
+      if first:
+        tstats[].firstMessageDeliveries.addCapped(
+          1, topicParams.firstMessageDeliveriesCap
+        )
 
-          tstats[].meshMessageDeliveries.addCapped(
-            1, topicParams.meshMessageDeliveriesCap)
-      do: # make sure we don't loose this information
-        stats.topicInfos[tt] = TopicInfo(meshMessageDeliveries: 1)
+      if tstats[].inMesh:
+        tstats[].meshMessageDeliveries.addCapped(
+          1, topicParams.meshMessageDeliveriesCap
+        )
+    do:
+      stats.topicInfos[topic] = TopicInfo(meshMessageDeliveries: 1)

libp2p/protocols/pubsub/gossipsub/types.nim

@@ -7,19 +7,19 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import chronos
-import std/[tables, sets]
+import std/[options, tables, sets]
 import ".."/[floodsub, peertable, mcache, pubsubpeer]
 import "../rpc"/[messages]
 import "../../.."/[peerid, multiaddress, utility]
 
+export options, tables, sets
+
 const
-  GossipSubCodec* = "/meshsub/1.1.0"
+  GossipSubCodec_12* = "/meshsub/1.2.0"
+  GossipSubCodec_11* = "/meshsub/1.1.0"
   GossipSubCodec_10* = "/meshsub/1.0.0"
 
 # overlay parameters
@@ -33,20 +33,18 @@ const
   GossipSubHistoryLength* = 5
   GossipSubHistoryGossip* = 3
 
-# heartbeat interval
+  # heartbeat interval
   GossipSubHeartbeatInterval* = 1.seconds
 
 # fanout ttl
-const
-  GossipSubFanoutTTL* = 1.minutes
+const GossipSubFanoutTTL* = 1.minutes
 
 # gossip parameters
-const
-  GossipBackoffPeriod* = 1.minutes
+const GossipBackoffPeriod* = 1.minutes
 
 const
   BackoffSlackTime* = 2 # seconds
-  IWantPeerBudget* = 25 # 25 messages per second ( reset every heartbeat )
+  PingsPeerBudget* = 100 # maximum of 6.4kb/heartbeat (6.4kb/s with default 1 second/hb)
   IHavePeerBudget* = 10
   # the max amount of IHave to expose, not by spec, but go as example
   # rust sigp: https://github.com/sigp/rust-libp2p/blob/f53d02bc873fef2bf52cd31e3d5ce366a41d8a8c/protocols/gossipsub/src/config.rs#L572
@@ -54,8 +52,7 @@ const
   IHaveMaxLength* = 5000
 
 type
-  TopicInfo* = object
-    # gossip 1.1 related
+  TopicInfo* = object # gossip 1.1 related
     graftTime*: Moment
     meshTime*: Duration
     inMesh*: bool
@@ -103,6 +100,11 @@ type
     behaviourPenalty*: float64 # the eventual penalty score
 
   GossipSubParams* {.public.} = object
+    # explicit is used to check if the GossipSubParams instance was created by the user either passing params to GossipSubParams(...)
+    # or GossipSubParams.init(...). In the first case explicit should be set to true when calling the Nim constructor.
+    # In the second case, the param isn't necessary and should be always be set to true by init.
+    # If none of those options were used, it means the instance was created using Nim default values.
+    # In this case, GossipSubParams.init() should be called when initing GossipSub to set the values to their default value defined by nim-libp2p.
     explicit*: bool
     pruneBackoff*: Duration
     unsubscribeBackoff*: Duration
@@ -143,29 +145,38 @@ type
     disconnectBadPeers*: bool
     enablePX*: bool
 
+    bandwidthEstimatebps*: int
+      # This is currently used only for limting flood publishing. 0 disables flood-limiting completely
+
+    overheadRateLimit*: Opt[tuple[bytes: int, interval: Duration]]
+    disconnectPeerAboveRateLimit*: bool
+
+    # Max number of elements allowed in the non-priority queue. When this limit has been reached, the peer will be disconnected.
+    maxNumElementsInNonPriorityQueue*: int
+
   BackoffTable* = Table[string, Table[PeerId, Moment]]
-  ValidationSeenTable* = Table[MessageId, HashSet[PubSubPeer]]
+  ValidationSeenTable* = Table[SaltedId, HashSet[PubSubPeer]]
 
   RoutingRecordsPair* = tuple[id: PeerId, record: Option[PeerRecord]]
-  RoutingRecordsHandler* =
-    proc(peer: PeerId,
+  RoutingRecordsHandler* = proc(
+    peer: PeerId,
     tag: string, # For gossipsub, the topic
-    peers: seq[RoutingRecordsPair])
-    {.gcsafe, raises: [Defect].}
+    peers: seq[RoutingRecordsPair],
+  ) {.gcsafe, raises: [].}
 
   GossipSub* = ref object of FloodSub
-    mesh*: PeerTable                           # peers that we send messages to when we are subscribed to the topic
-    fanout*: PeerTable                         # peers that we send messages to when we're not subscribed to the topic
-    gossipsub*: PeerTable                      # peers that are subscribed to a topic
-    explicit*: PeerTable                       # directpeers that we keep alive explicitly
-    backingOff*: BackoffTable                  # peers to backoff from when replenishing the mesh
-    lastFanoutPubSub*: Table[string, Moment]   # last publish time for fanout topics
-    gossip*: Table[string, seq[ControlIHave]]  # pending gossip
-    control*: Table[string, ControlMessage]    # pending control messages
-    mcache*: MCache                            # messages cache
-    validationSeen*: ValidationSeenTable       # peers who sent us message in validation
-    heartbeatFut*: Future[void]                # cancellation future for heartbeat interval
-    scoringHeartbeatFut*: Future[void]         # cancellation future for scoring heartbeat interval
+    mesh*: PeerTable # peers that we send messages to when we are subscribed to the topic
+    fanout*: PeerTable
+      # peers that we send messages to when we're not subscribed to the topic
+    gossipsub*: PeerTable # peers that are subscribed to a topic
+    subscribedDirectPeers*: PeerTable # directpeers that we keep alive
+    backingOff*: BackoffTable # peers to backoff from when replenishing the mesh
+    lastFanoutPubSub*: Table[string, Moment] # last publish time for fanout topics
+    mcache*: MCache # messages cache
+    validationSeen*: ValidationSeenTable # peers who sent us message in validation
+    heartbeatFut*: Future[void] # cancellation future for heartbeat interval
+    scoringHeartbeatFut*: Future[void]
+      # cancellation future for scoring heartbeat interval
     heartbeatRunning*: bool
 
     peerStats*: Table[PeerId, PeerStats]
@@ -177,8 +188,7 @@ type
 
     heartbeatEvents*: seq[AsyncEvent]
 
-  MeshMetrics* = object
-    # scratch buffers for metrics
+  MeshMetrics* = object # scratch buffers for metrics
     otherPeersPerTopicMesh*: int64
     otherPeersPerTopicFanout*: int64
     otherPeersPerTopicGossipsub*: int64

libp2p/protocols/pubsub/mcache.nim

@@ -7,60 +7,60 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[sets, tables, options]
+import std/[sets, tables]
 import rpc/[messages]
+import results
 
-export sets, tables, messages, options
+export sets, tables, messages, results
 
 type
   CacheEntry* = object
-    mid*: MessageId
-    topicIds*: seq[string]
+    msgId*: MessageId
+    topic*: string
 
   MCache* = object of RootObj
     msgs*: Table[MessageId, Message]
     history*: seq[seq[CacheEntry]]
+    pos*: int
     windowSize*: Natural
 
-func get*(c: MCache, mid: MessageId): Option[Message] =
-  if mid in c.msgs:
-    try: some(c.msgs[mid])
-    except KeyError: raiseAssert "checked"
+func get*(c: MCache, msgId: MessageId): Opt[Message] =
+  if msgId in c.msgs:
+    try:
+      Opt.some(c.msgs[msgId])
+    except KeyError:
+      raiseAssert "checked"
   else:
-    none(Message)
+    Opt.none(Message)
 
-func contains*(c: MCache, mid: MessageId): bool =
-  mid in c.msgs
+func contains*(c: MCache, msgId: MessageId): bool =
+  msgId in c.msgs
 
 func put*(c: var MCache, msgId: MessageId, msg: Message) =
   if not c.msgs.hasKeyOrPut(msgId, msg):
     # Only add cache entry if the message was not already in the cache
-    c.history[0].add(CacheEntry(mid: msgId, topicIds: msg.topicIds))
+    c.history[c.pos].add(CacheEntry(msgId: msgId, topic: msg.topic))
 
 func window*(c: MCache, topic: string): HashSet[MessageId] =
-  let
-    len = min(c.windowSize, c.history.len)
+  let len = min(c.windowSize, c.history.len)
 
-  for i in 0..<len:
-    for entry in c.history[i]:
-      for t in entry.topicIds:
-        if t == topic:
-          result.incl(entry.mid)
-          break
+  for i in 0 ..< len:
+    # Work backwards from `pos` in the circular buffer
+    for entry in c.history[(c.pos + c.history.len - i) mod c.history.len]:
+      if entry.topic == topic:
+        result.incl(entry.msgId)
 
 func shift*(c: var MCache) =
-  for entry in c.history.pop():
-    c.msgs.del(entry.mid)
+  # Shift circular buffer to write to a new position, clearing it from past
+  # iterations
+  c.pos = (c.pos + 1) mod c.history.len
 
-  c.history.insert(@[])
+  for entry in c.history[c.pos]:
+    c.msgs.del(entry.msgId)
+
+  reset(c.history[c.pos])
 
 func init*(T: type MCache, window, history: Natural): T =
-  T(
-    history: newSeq[seq[CacheEntry]](history),
-    windowSize: window
-  )
+  T(history: newSeq[seq[CacheEntry]](history), windowSize: window)

libp2p/protocols/pubsub/peertable.nim

@@ -7,16 +7,14 @@
 # This file may not be copied, modified, or distributed except according to
 # those terms.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
-import std/[tables, sets]
+import std/[tables, sets, sequtils]
 import ./pubsubpeer, ../../peerid
 
-type
-  PeerTable* = Table[string, HashSet[PubSubPeer]] # topic string to peer map
+export tables, sets
+
+type PeerTable* = Table[string, HashSet[PubSubPeer]] # topic string to peer map
 
 proc hasPeerId*(t: PeerTable, topic: string, peerId: PeerId): bool =
   if topic in t:
@@ -24,15 +22,14 @@ proc hasPeerId*(t: PeerTable, topic: string, peerId: PeerId): bool =
       for peer in t[topic]:
         if peer.peerId == peerId:
           return true
-    except KeyError: raiseAssert "checked with in"
+    except KeyError:
+      raiseAssert "checked with in"
   false
 
 func addPeer*(table: var PeerTable, topic: string, peer: PubSubPeer): bool =
   # returns true if the peer was added,
   # false if it was already in the collection
-  not table.mgetOrPut(topic,
-    initHashSet[PubSubPeer]())
-    .containsOrIncl(peer)
+  not table.mgetOrPut(topic, initHashSet[PubSubPeer]()).containsOrIncl(peer)
 
 func removePeer*(table: var PeerTable, topic: string, peer: PubSubPeer) =
   table.withValue(topic, peers):
@@ -43,11 +40,23 @@ func removePeer*(table: var PeerTable, topic: string, peer: PubSubPeer) =
 func hasPeer*(table: PeerTable, topic: string, peer: PubSubPeer): bool =
   try:
     (topic in table) and (peer in table[topic])
-  except KeyError: raiseAssert "checked with in"
+  except KeyError:
+    raiseAssert "checked with in"
 
 func peers*(table: PeerTable, topic: string): int =
   if topic in table:
-    try: table[topic].len
-    except KeyError: raiseAssert "checked with in"
+    try:
+      table[topic].len
+    except KeyError:
+      raiseAssert "checked with in"
+  else:
+    0
+
+func outboundPeers*(table: PeerTable, topic: string): int =
+  if topic in table:
+    try:
+      table[topic].countIt(it.outbound)
+    except KeyError:
+      raiseAssert "checked with in"
   else:
     0