add test

Add simple logging mechanism on checkExpiring failure.

.github/workflows/bumper.yml

@@ -24,13 +24,14 @@ jobs:
           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
+          cd nbc
+          git submodule update --init vendor/nim-libp2p
+          cd vendor/nim-libp2p
           git checkout $GITHUB_SHA
 
       - name: Commit this bump
@@ -38,7 +39,7 @@ jobs:
           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 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/ci.yml

@@ -28,7 +28,7 @@ jobs:
             cpu: amd64
           #- os: windows
             #cpu: i386
-        branch: [version-1-2, version-1-6]
+        branch: [version-1-6]
         include:
           - target:
               os: linux

.github/workflows/daily.yml

@@ -0,0 +1,12 @@
+name: Daily
+on:
+  schedule:
+    - cron: "30 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  call-multi-nim-common:
+    uses: ./.github/workflows/daily_common.yml
+    with:
+      nim-branch: "['version-1-6','version-2-0']"
+      cpu: "['amd64']"

.github/workflows/daily_common.yml

@@ -0,0 +1,84 @@
+name: daily-common
+
+on:
+  workflow_call:
+    inputs:
+      nim-branch:
+        description: 'Nim branch'
+        required: true
+        type: string
+      cpu:
+        description: 'CPU'
+        required: true
+        type: string
+      exclude:
+        description: 'Exclude matrix configurations'
+        required: false
+        type: string
+        default: "[]"
+
+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:
+        platform:
+          - os: linux
+            builder: ubuntu-20
+            shell: bash
+          - os: macos
+            builder: macos-12
+            shell: bash
+          - os: windows
+            builder: windows-2019
+            shell: msys2 {0}
+        branch: ${{ fromJSON(inputs.nim-branch) }}
+        cpu: ${{ fromJSON(inputs.cpu) }}
+        exclude: ${{ fromJSON(inputs.exclude) }}
+
+    defaults:
+      run:
+        shell: ${{ matrix.platform.shell }}
+
+    name: '${{ matrix.platform.os }}-${{ matrix.cpu }} (Nim ${{ matrix.branch }})'
+    runs-on: ${{ matrix.platform.builder }}
+    continue-on-error: ${{ matrix.branch == 'devel' || matrix.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.branch }}
+          cpu: ${{ matrix.cpu }}
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '~1.15.5'
+          cache: false
+
+      - name: Install p2pd
+        run: |
+          V=1 bash scripts/build_p2pd.sh p2pdCache 124530a3
+
+      - name: Run tests
+        run: |
+          nim --version
+          nimble --version
+          nimble install -y --depsOnly
+          NIMFLAGS="${NIMFLAGS} --mm:refc" nimble test
+          if [[ "${{ matrix.branch }}" == "devel" ]]; then
+            echo -e "\nTesting with '--mm:orc':\n"
+            NIMFLAGS="${NIMFLAGS} --mm:orc" nimble test
+          fi

.github/workflows/daily_i386.yml

@@ -0,0 +1,13 @@
+name: Daily i386
+on:
+  schedule:
+    - cron: "30 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  call-multi-nim-common:
+    uses: ./.github/workflows/daily_common.yml
+    with:
+      nim-branch: "['version-1-6','version-2-0', 'devel']"
+      cpu: "['i386']"
+      exclude: "[{'platform': {'os':'macos'}}, {'platform': {'os':'windows'}}]"

.github/workflows/daily_nim_devel.yml

@@ -0,0 +1,12 @@
+name: Daily Nim Devel
+on:
+  schedule:
+    - cron: "30 6 * * *"
+  workflow_dispatch:
+
+jobs:
+  call-multi-nim-common:
+    uses: ./.github/workflows/daily_common.yml
+    with:
+      nim-branch: "['devel']"
+      cpu: "['amd64']"

.github/workflows/doc.yml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: jiro4989/setup-nim-action@v1
         with:
-          nim-version: 'stable'
+          nim-version: '1.6.x'
 
       - name: Generate doc
         run: |

.github/workflows/interop.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Build image
         run: >
-          cd multidim-interop/impl/nim/v1.0 &&
+          cd transport-interop/impl/nim/v1.0 &&
           make commitSha=$GITHUB_SHA image_name=nim-libp2p-head
 
       - name: Create ping-version.json
@@ -45,10 +45,24 @@ jobs:
                 ]
             }
           EOF
-          
+
           ) > ${{ github.workspace }}/test_head.json
 
-      - uses: libp2p/test-plans/.github/actions/run-interop-ping-test@master
+      - uses: libp2p/test-plans/.github/actions/run-transport-interop-test@master
         with:
           test-filter: nim-libp2p-head
           extra-versions: ${{ github.workspace }}/test_head.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/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@#acf9645e328bdcab481cfda1c158e07ecd46bd7b
-chronicles;https://github.com/status-im/nim-chronicles@#1e6350870855541b381d77d4659688bc0d2c4227
-chronos;https://github.com/status-im/nim-chronos@#ab5a8c2e0f6941fe3debd61dff0293790079d1b0
-dnsclient;https://github.com/ba0f3/dnsclient.nim@#fcd7443634b950eaea574e5eaa00a628ae029823
-faststreams;https://github.com/status-im/nim-faststreams@#814f8927e1f356f39219f37f069b83066bcc893a
-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@#abf3acc7f06cee9ee2c287d2f31413dc3df4c04e
-nimcrypto;https://github.com/cheatfate/nimcrypto@#4014ef939b51e02053c2e16dd3481d47bc9267dd
-secp256k1;https://github.com/status-im/nim-secp256k1@#fd173fdff863ce2e211cf64c9a03bc7539fe40b0
-serialization;https://github.com/status-im/nim-serialization@#5b7cea55efeb074daa8abd8146a03a34adb4521a
-stew;https://github.com/status-im/nim-stew@#003fe9f0c83c2b0b2ccbd37087e6d1ccd30a3234
+bearssl;https://github.com/status-im/nim-bearssl@#e4157639db180e52727712a47deaefcbbac6ec86
+chronicles;https://github.com/status-im/nim-chronicles@#32ac8679680ea699f7dbc046e8e0131cac97d41a
+chronos;https://github.com/status-im/nim-chronos@#ba143e029f35fd9b4cd3d89d007cc834d0d5ba3c
+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@#883c7a50ad3b82158e64d074c5578fe33ab3c452
-websock;https://github.com/status-im/nim-websock@#fea05cde8b123b38d1a0a8524b77efbc84daa848
-zlib;https://github.com/status-im/nim-zlib@#826e2fc013f55b4478802d4f2e39f187c50d520a
+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

@@ -105,7 +105,7 @@ 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:

config.nims

@@ -9,11 +9,8 @@ switch("warning", "ObservableStores:off")
 switch("warning", "LockLevel:off")
 --define:chronosStrictException
 --styleCheck:usages
-if (NimMajor, NimMinor) < (1, 6):
-  --styleCheck:hint
-else:
-  switch("warningAsError", "UseBase:on")
-  --styleCheck:error
+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

examples/helloworld.nim

@@ -13,7 +13,7 @@ type
 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!")
 
@@ -40,7 +40,7 @@ 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

examples/tutorial_1_connect.nim

@@ -53,7 +53,7 @@ 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()

examples/tutorial_2_customproto.nim

@@ -25,7 +25,7 @@ type TestProto = ref object of LPProtocol
 
 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))
@@ -44,7 +44,7 @@ proc hello(p: TestProto, conn: Connection) {.async.} =
 ## Again, pretty straight-forward, 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()

examples/tutorial_3_protobuf.nim

@@ -108,7 +108,7 @@ type
 
 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()
@@ -126,7 +126,7 @@ 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.} =
     let metricCount = rng[].generate(uint32) mod 16

examples/tutorial_5_discovery.nim

@@ -33,7 +33,7 @@ proc createSwitch(rdv: RendezVous = RendezVous.new()): Switch =
 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)
@@ -49,7 +49,7 @@ 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()
 

examples/tutorial_6_game.nim

@@ -143,7 +143,7 @@ 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.} =
+  proc handle(conn: Connection, proto: string) {.async.} =
     defer: await conn.closeWithEof()
     if g.peerFound.finished or g.hasCandidate:
       await conn.close()

libp2p.nimble

@@ -7,7 +7,7 @@ description   = "LibP2P implementation"
 license       = "MIT"
 skipDirs      = @["tests", "examples", "Nim", "tools", "scripts", "docs"]
 
-requires "nim >= 1.2.0",
+requires "nim >= 1.6.0",
          "nimcrypto >= 0.4.1",
          "dnsclient >= 0.3.0 & < 0.4.0",
          "bearssl >= 0.1.4",
@@ -17,14 +17,24 @@ requires "nim >= 1.2.0",
          "secp256k1",
          "stew#head",
          "websock",
-         "unittest2 >= 0.0.5 & < 0.1.0"
+         "unittest2"
+
+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
 
-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 ")
+  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 +44,7 @@ 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 +52,7 @@ 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":
@@ -104,15 +114,12 @@ 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"
+  buildSample("tutorial_6_game", false, "--styleCheck:off")
 
 # pin system
 # while nimble lockfile
@@ -123,7 +130,7 @@ 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

libp2p/builders.nim

@@ -16,10 +16,7 @@ runnableExamples:
    # etc
    .build()
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import
   options, tables, chronos, chronicles, sequtils,
@@ -28,7 +25,7 @@ import
   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
 
@@ -36,7 +33,7 @@ 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,
@@ -57,11 +54,12 @@ type
     protoVersion: string
     agentVersion: string
     nameResolver: NameResolver
-    peerStoreCapacity: Option[int]
+    peerStoreCapacity: Opt[int]
     autonat: bool
     circuitRelay: Relay
     rdv: RendezVous
     services: seq[Service]
+    observedAddrManager: ObservedAddrManager
 
 proc new*(T: type[SwitchBuilder]): T {.public.} =
   ## Creates a SwitchBuilder
@@ -124,8 +122,8 @@ proc withMplex*(
   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): SwitchBuilder =
+  proc newMuxer(conn: Connection): Muxer = Yamux.new(conn, windowSize)
 
   assert b.muxers.countIt(it.codec == YamuxCodec) == 0, "Yamux build multiple times"
   b.muxers.add(MuxerProvider.new(newMuxer, YamuxCodec))
@@ -173,7 +171,7 @@ proc withMaxConnsPerPeer*(b: SwitchBuilder, maxConnsPerPeer: int): SwitchBuilder
   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.} =
@@ -204,8 +202,12 @@ proc withServices*(b: SwitchBuilder, services: seq[Service]): SwitchBuilder =
   b.services = services
   b
 
+proc withObservedAddrManager*(b: SwitchBuilder, observedAddrManager: ObservedAddrManager): SwitchBuilder =
+  b.observedAddrManager = observedAddrManager
+  b
+
 proc build*(b: SwitchBuilder): Switch
-  {.raises: [Defect, LPError], public.} =
+  {.raises: [LPError], public.} =
 
   if b.rng == nil: # newRng could fail
     raise newException(Defect, "Cannot initialize RNG")
@@ -226,11 +228,16 @@ proc build*(b: SwitchBuilder): Switch
       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)
     ms = MultistreamSelect.new()
-    muxedUpgrade = MuxedUpgrade.new(b.muxers, secureManagerInstances, connManager, ms)
+    muxedUpgrade = MuxedUpgrade.new(b.muxers, secureManagerInstances, ms)
 
   let
     transports = block:
@@ -245,9 +252,9 @@ proc build*(b: SwitchBuilder): Switch
   if isNil(b.rng):
     b.rng = newRng()
 
-  let peerStore =
-    if isSome(b.peerStoreCapacity):
-      PeerStore.new(identify, b.peerStoreCapacity.get())
+  let peerStore = block:
+    b.peerStoreCapacity.withValue(capacity):
+      PeerStore.new(identify, capacity)
     else:
       PeerStore.new(identify)
 
@@ -296,7 +303,7 @@ proc newStandardSwitch*(
   nameResolver: NameResolver = nil,
   sendSignedPeerRecord = false,
   peerStoreCapacity = 1000): Switch
-  {.raises: [Defect, LPError], public.} =
+  {.raises: [LPError], public.} =
   ## Helper for common switch configurations.
   {.push warning[Deprecated]:off.}
   if SecureProtocol.Secio in secureManagers:
@@ -319,7 +326,7 @@ proc newStandardSwitch*(
     .withNameResolver(nameResolver)
     .withNoise()
 
-  if privKey.isSome():
-    b = b.withPrivateKey(privKey.get())
+  privKey.withValue(pkey):
+    b = b.withPrivateKey(pkey)
 
   b.build()

libp2p/cid.nim

@@ -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
@@ -279,9 +276,6 @@ 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

@@ -7,12 +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/[options, tables, sequtils, sets]
+import std/[tables, sequtils, sets]
 import pkg/[chronos, chronicles, metrics]
 import peerinfo,
        peerstore,
@@ -51,7 +48,7 @@ type
 
   ConnEventHandler* =
     proc(peerId: PeerId, event: ConnEvent): Future[void]
-      {.gcsafe, raises: [Defect].}
+      {.gcsafe, raises: [].}
 
   PeerEventKind* {.pure.} = enum
     Left,
@@ -65,7 +62,7 @@ type
         discard
 
   PeerEventHandler* =
-    proc(peerId: PeerId, event: PeerEvent): Future[void] {.gcsafe, raises: [Defect].}
+    proc(peerId: PeerId, event: PeerEvent): Future[void] {.gcsafe, raises: [].}
 
   ConnManager* = ref object of RootObj
     maxConnsPerPeer: int
@@ -131,7 +128,7 @@ proc removeConnEventHandler*(c: ConnManager,
 
 proc triggerConnEvent*(c: ConnManager,
                        peerId: PeerId,
-                       event: ConnEvent) {.async, gcsafe.} =
+                       event: ConnEvent) {.async.} =
   try:
     trace "About to trigger connection events", peer = peerId
     if c.connEvents[event.kind].len() > 0:
@@ -163,7 +160,7 @@ proc removePeerEventHandler*(c: ConnManager,
 
 proc triggerPeerEvents*(c: ConnManager,
                         peerId: PeerId,
-                        event: PeerEvent) {.async, gcsafe.} =
+                        event: PeerEvent) {.async.} =
 
   trace "About to trigger peer events", peer = peerId
   if c.peerEvents[event.kind].len == 0:
@@ -285,7 +282,7 @@ proc selectMuxer*(c: ConnManager, peerId: PeerId): Muxer =
 
 proc storeMuxer*(c: ConnManager,
                  muxer: Muxer)
-                 {.raises: [Defect, CatchableError].} =
+                 {.raises: [CatchableError].} =
   ## store the connection and muxer
   ##
 
@@ -338,7 +335,7 @@ 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():
@@ -382,7 +379,7 @@ proc trackMuxer*(cs: ConnectionSlot, mux: Muxer) =
   cs.trackConnection(mux.connection)
 
 proc getStream*(c: ConnManager,
-                muxer: Muxer): Future[Connection] {.async, gcsafe.} =
+                muxer: Muxer): Future[Connection] {.async.} =
   ## get a muxed stream for the passed muxer
   ##
 
@@ -390,7 +387,7 @@ proc getStream*(c: ConnManager,
     return await muxer.newStream()
 
 proc getStream*(c: ConnManager,
-                peerId: PeerId): Future[Connection] {.async, gcsafe.} =
+                peerId: PeerId): Future[Connection] {.async.} =
   ## get a muxed stream for the passed peer from any connection
   ##
 
@@ -398,7 +395,7 @@ proc getStream*(c: ConnManager,
 
 proc getStream*(c: ConnManager,
                 peerId: PeerId,
-                dir: Direction): Future[Connection] {.async, gcsafe.} =
+                dir: Direction): Future[Connection] {.async.} =
   ## get a muxed stream for the passed peer from a connection with `dir`
   ##
 

libp2p/crypto/chacha20poly1305.nim

@@ -15,10 +15,7 @@
 
 # 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

libp2p/crypto/crypto.nim

@@ -8,10 +8,7 @@
 # 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
 
@@ -68,11 +65,13 @@ 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.
@@ -89,8 +88,6 @@ type
     Sha256,
     Sha512
 
-  ECDHEScheme* = EcCurveKind
-
   PublicKey* = object
     case scheme*: PKScheme
     of PKScheme.RSA:
@@ -458,7 +455,8 @@ 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 +469,7 @@ 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:
@@ -520,6 +518,14 @@ 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.
   ##
@@ -873,34 +879,6 @@ proc mac*(secret: Secret, id: int): seq[byte] {.inline.} =
   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] =
   ## Compare values and calculate `order` parameter.
@@ -976,9 +954,8 @@ proc decodeProposal*(message: seq[byte], nonce, pubkey: var seq[byte],
   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()
+  r1.get(false) and r2.get(false) and r3.get(false) and
+  r4.get(false) and r5.get(false)
 
 proc createExchange*(epubkey, signature: openArray[byte]): seq[byte] =
   ## Create SecIO exchange message using ephemeral public key ``epubkey`` and
@@ -998,32 +975,32 @@ proc decodeExchange*(message: seq[byte],
   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()
+  r1.get(false) and r2.get(false)
 
 ## Serialization/Deserialization helpers
 
 proc write*(vb: var VBuffer, pubkey: PublicKey) {.
-     inline, raises: [Defect, ResultError[CryptoError]].} =
+     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]].} =
+     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]].} =
+     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]].} =
+     inline, raises: [ResultError[CryptoError]].} =
   write(pb, field, key.getBytes().tryGet())
 
 proc write*(pb: var ProtoBuffer, field: int, sig: Signature) {.
-     inline, raises: [Defect].} =
+     inline, raises: [].} =
   write(pb, field, sig.getBytes())
 
 proc getField*[T: PublicKey|PrivateKey](pb: ProtoBuffer, field: int,

libp2p/crypto/curve25519.nim

@@ -15,10 +15,7 @@
 
 # RFC @ https://tools.ietf.org/html/rfc7748
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import bearssl/[ec, rand]
 import stew/results

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.
@@ -997,3 +994,33 @@ proc verify*[T: byte|char](sig: EcSignature, message: openArray[T],
     # 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/ed25519/ed25519.nim

@@ -11,10 +11,7 @@
 ## This code is a port of the public domain, "ref10" implementation of ed25519
 ## from SUPERCOP.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import bearssl/rand
 import constants

libp2p/crypto/hkdf.nim

@@ -9,10 +9,7 @@
 
 # https://tools.ietf.org/html/rfc5869
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import nimcrypto
 import bearssl/[kdf, hash]

libp2p/crypto/minasn1.nim

@@ -9,10 +9,7 @@
 
 ## 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

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

libp2p/crypto/secp.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 bearssl/rand
 import

libp2p/daemon/daemonapi.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: [].}
 
 ## This module implementes API for `go-libp2p-daemon`.
 import std/[os, osproc, strutils, tables, strtabs, sequtils]
@@ -153,10 +150,10 @@ type
     key*: PublicKey
 
   P2PStreamCallback* = proc(api: DaemonAPI,
-                            stream: P2PStream): Future[void] {.gcsafe, raises: [Defect, CatchableError].}
+                            stream: P2PStream): Future[void] {.gcsafe, raises: [CatchableError].}
   P2PPubSubCallback* = proc(api: DaemonAPI,
                             ticket: PubsubTicket,
-                            message: PubSubMessage): Future[bool] {.gcsafe, raises: [Defect, CatchableError].}
+                            message: PubSubMessage): Future[bool] {.gcsafe, raises: [CatchableError].}
 
   DaemonError* = object of LPError
   DaemonRemoteError* = object of DaemonError
@@ -474,7 +471,7 @@ proc checkResponse(pb: ProtoBuffer): ResponseKind {.inline.} =
     else:
       result = ResponseKind.Error
 
-proc getErrorMessage(pb: ProtoBuffer): string {.inline, raises: [Defect, DaemonLocalError].} =
+proc getErrorMessage(pb: ProtoBuffer): string {.inline, raises: [DaemonLocalError].} =
   var error: seq[byte]
   if pb.getRequiredField(ResponseType.ERROR.int, error).isOk():
     if initProtoBuffer(error).getRequiredField(1, result).isErr():
@@ -504,7 +501,7 @@ proc recvMessage(conn: StreamTransport): Future[seq[byte]] {.async.} =
   result = buffer
 
 proc newConnection*(api: DaemonAPI): Future[StreamTransport]
-  {.raises: [Defect, LPError].} =
+  {.raises: [LPError].} =
   result = connect(api.address)
 
 proc closeConnection*(api: DaemonAPI, transp: StreamTransport): Future[void] =
@@ -515,7 +512,7 @@ proc socketExists(address: MultiAddress): Future[bool] {.async.} =
     var transp = await connect(address)
     await transp.closeWait()
     result = true
-  except CatchableError, Defect:
+  except CatchableError:
     result = false
 
 when defined(windows):
@@ -556,7 +553,7 @@ proc getSocket(pattern: string,
     closeSocket(sock)
 
 # This is forward declaration needed for newDaemonApi()
-proc listPeers*(api: DaemonAPI): Future[seq[PeerInfo]] {.async, gcsafe.}
+proc listPeers*(api: DaemonAPI): Future[seq[PeerInfo]] {.async.}
 
 proc copyEnv(): StringTableRef =
   ## This procedure copy all environment variables into StringTable.
@@ -758,7 +755,7 @@ proc newDaemonApi*(flags: set[P2PDaemonFlags] = {},
 
   # Starting daemon process
   # echo "Starting ", cmd, " ", args.join(" ")
-  api.process = 
+  api.process =
     exceptionToAssert:
       startProcess(cmd, "", args, env, {poParentStreams})
   # Waiting until daemon will not be bound to control socket.
@@ -837,7 +834,7 @@ proc transactMessage(transp: StreamTransport,
   result = initProtoBuffer(message)
 
 proc getPeerInfo(pb: ProtoBuffer): PeerInfo
-  {.raises: [Defect, DaemonLocalError].} =
+  {.raises: [DaemonLocalError].} =
   ## Get PeerInfo object from ``pb``.
   result.addresses = newSeq[MultiAddress]()
   if pb.getRequiredField(1, result.peer).isErr():
@@ -868,7 +865,7 @@ proc connect*(api: DaemonAPI, peer: PeerId,
                                                          timeout))
     pb.withMessage() do:
       discard
-  except CatchableError, Defect:
+  except CatchableError:
     await api.closeConnection(transp)
 
 proc disconnect*(api: DaemonAPI, peer: PeerId) {.async.} =
@@ -928,7 +925,7 @@ proc streamHandler(server: StreamServer, transp: StreamTransport) {.async.} =
       asyncSpawn handler(api, stream)
 
 proc addHandler*(api: DaemonAPI, protocols: seq[string],
-                 handler: P2PStreamCallback) {.async, raises: [Defect, LPError].} =
+                 handler: P2PStreamCallback) {.async, raises: [LPError].} =
   ## Add stream handler ``handler`` for set of protocols ``protocols``.
   var transp = await api.newConnection()
   let maddress = await getSocket(api.pattern, addr api.ucounter)
@@ -998,7 +995,7 @@ proc cmTrimPeers*(api: DaemonAPI) {.async.} =
     await api.closeConnection(transp)
 
 proc dhtGetSinglePeerInfo(pb: ProtoBuffer): PeerInfo
-  {.raises: [Defect, DaemonLocalError].} =
+  {.raises: [DaemonLocalError].} =
   var res: seq[byte]
   if pb.getRequiredField(2, res).isOk():
     result = initProtoBuffer(res).getPeerInfo()
@@ -1006,23 +1003,23 @@ proc dhtGetSinglePeerInfo(pb: ProtoBuffer): PeerInfo
     raise newException(DaemonLocalError, "Missing required field `peer`!")
 
 proc dhtGetSingleValue(pb: ProtoBuffer): seq[byte]
-  {.raises: [Defect, DaemonLocalError].} =
+  {.raises: [DaemonLocalError].} =
   result = newSeq[byte]()
   if pb.getRequiredField(3, result).isErr():
     raise newException(DaemonLocalError, "Missing field `value`!")
 
 proc dhtGetSinglePublicKey(pb: ProtoBuffer): PublicKey
-  {.raises: [Defect, DaemonLocalError].} =
+  {.raises: [DaemonLocalError].} =
   if pb.getRequiredField(3, result).isErr():
     raise newException(DaemonLocalError, "Missing field `value`!")
 
 proc dhtGetSinglePeerId(pb: ProtoBuffer): PeerId
-  {.raises: [Defect, DaemonLocalError].} =
+  {.raises: [DaemonLocalError].} =
   if pb.getRequiredField(3, result).isErr():
     raise newException(DaemonLocalError, "Missing field `value`!")
 
 proc enterDhtMessage(pb: ProtoBuffer, rt: DHTResponseType): ProtoBuffer
-  {.inline, raises: [Defect, DaemonLocalError].} =
+  {.inline, raises: [DaemonLocalError].} =
   var dhtResponse: seq[byte]
   if pb.getRequiredField(ResponseType.DHT.int, dhtResponse).isOk():
     var pbDhtResponse = initProtoBuffer(dhtResponse)
@@ -1035,13 +1032,13 @@ proc enterDhtMessage(pb: ProtoBuffer, rt: DHTResponseType): ProtoBuffer
     var value: seq[byte]
     if pbDhtResponse.getRequiredField(3, value).isErr():
       raise newException(DaemonLocalError, "Missing required DHT field `value`!")
-    
+
     return initProtoBuffer(value)
   else:
     raise newException(DaemonLocalError, "Wrong message type!")
 
 proc enterPsMessage(pb: ProtoBuffer): ProtoBuffer
-  {.inline, raises: [Defect, DaemonLocalError].} =
+  {.inline, raises: [DaemonLocalError].} =
   var res: seq[byte]
   if pb.getRequiredField(ResponseType.PUBSUB.int, res).isErr():
     raise newException(DaemonLocalError, "Wrong message type!")
@@ -1049,7 +1046,7 @@ proc enterPsMessage(pb: ProtoBuffer): ProtoBuffer
   initProtoBuffer(res)
 
 proc getDhtMessageType(pb: ProtoBuffer): DHTResponseType
-  {.inline, raises: [Defect, DaemonLocalError].} =
+  {.inline, raises: [DaemonLocalError].} =
   var dtype: uint
   if pb.getRequiredField(1, dtype).isErr():
     raise newException(DaemonLocalError, "Missing required DHT field `type`!")

libp2p/daemon/transpool.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: [].}
 
 ## This module implements Pool of StreamTransport.
 import chronos

libp2p/debugutils.nim

@@ -25,7 +25,7 @@
 ##   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
@@ -33,7 +33,7 @@ import protobuf/minprotobuf, stream/connection, protocols/secure/secure,
 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
@@ -43,10 +43,10 @@ type
     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"
@@ -72,7 +72,8 @@ proc dumpMessage*(conn: SecureConn, direction: FlowDirection,
   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()
 
@@ -100,7 +101,7 @@ 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 +109,12 @@ 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 +124,27 @@ 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
@@ -242,27 +239,19 @@ proc toString*(msg: ProtoMessage, dump = true): string =
       " >> "
   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]"
+      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 =
-    if msg.seqID.isSome():
-      "seqID = " & $(msg.seqID.get()) & " "
-    else:
-      ""
-  let mtype =
-    if msg.mtype.isSome():
-      "type = " & $(msg.mtype.get()) & " "
-    else:
-      ""
+  let seqid = block:
+    msg.seqID.wihValue(seqid): "seqID = " & $seqid & " "
+    else: ""
+  let mtype = block:
+    msg.mtype.withValue(typ): "type = " & $typ & " "
+    else: ""
   res.add(" ")
   res.add(address)
   res.add(" ")

libp2p/dial.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 chronos
 import stew/results
@@ -29,7 +26,7 @@ method connect*(
   addrs: seq[MultiAddress],
   forceDial = false,
   reuseConnection = true,
-  upgradeDir = Direction.Out) {.async, base.} =
+  dir = Direction.Out) {.async, base.} =
   ## connect remote peer without negotiating
   ## a protocol
   ##

libp2p/dialer.nim

@@ -53,21 +53,21 @@ proc dialAndUpgrade(
   peerId: Opt[PeerId],
   hostname: string,
   address: MultiAddress,
-  upgradeDir = Direction.Out):
+  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
+      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
+          debug "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
 
@@ -75,15 +75,19 @@ proc dialAndUpgrade(
 
       let mux =
         try:
-          dialed.transportDir = upgradeDir
-          await transport.upgrade(dialed, upgradeDir, 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 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
+          debug "Upgrade failed", err = exc.msg, peerId = peerId.get(default(PeerId))
           if exc isnot CancelledError:
-            if upgradeDir == Direction.Out:
+            if dialed.dir == Direction.Out:
               libp2p_failed_upgrades_outgoing.inc()
             else:
               libp2p_failed_upgrades_incoming.inc()
@@ -91,7 +95,7 @@ proc dialAndUpgrade(
           # Try other address
           return nil
 
-      doAssert not isNil(mux), "connection died after upgrade " & $upgradeDir
+      doAssert not isNil(mux), "connection died after upgrade " & $dialed.dir
       debug "Dial successful", peerId = mux.connection.peerId
       return mux
   return nil
@@ -128,10 +132,10 @@ proc dialAndUpgrade(
   self: Dialer,
   peerId: Opt[PeerId],
   addrs: seq[MultiAddress],
-  upgradeDir = Direction.Out):
+  dir = Direction.Out):
   Future[Muxer] {.async.} =
 
-  debug "Dialing peer", peerId
+  debug "Dialing peer", peerId = peerId.get(default(PeerId))
 
   for rawAddress in addrs:
     # resolve potential dnsaddr
@@ -146,11 +150,11 @@ proc dialAndUpgrade(
           else: await self.nameResolver.resolveMAddress(expandedAddress)
 
       for resolvedAddress in resolvedAddresses:
-        result = await self.dialAndUpgrade(addrPeerId, hostname, resolvedAddress, upgradeDir)
+        result = await self.dialAndUpgrade(addrPeerId, hostname, resolvedAddress, dir)
         if not isNil(result):
           return result
 
-proc tryReusingConnection(self: Dialer, peerId: PeerId): Future[Opt[Muxer]] {.async.} =
+proc tryReusingConnection(self: Dialer, peerId: PeerId): Opt[Muxer] =
   let muxer = self.connManager.selectMuxer(peerId)
   if muxer == nil:
     return Opt.none(Muxer)
@@ -164,7 +168,7 @@ proc internalConnect(
   addrs: seq[MultiAddress],
   forceDial: bool,
   reuseConnection = true,
-  upgradeDir = Direction.Out):
+  dir = Direction.Out):
   Future[Muxer] {.async.} =
   if Opt.some(self.localPeerId) == peerId:
     raise newException(CatchableError, "can't dial self!")
@@ -174,15 +178,15 @@ proc internalConnect(
   try:
     await lock.acquire()
 
-    if peerId.isSome and reuseConnection:
-      let muxOpt = await self.tryReusingConnection(peerId.get())
-      if muxOpt.isSome:
-        return muxOpt.get()
+    if reuseConnection:
+      peerId.withValue(peerId):
+        self.tryReusingConnection(peerId).withValue(mux):
+          return mux
 
     let slot = self.connManager.getOutgoingSlot(forceDial)
     let muxed =
       try:
-        await self.dialAndUpgrade(peerId, addrs, upgradeDir)
+        await self.dialAndUpgrade(peerId, addrs, dir)
       except CatchableError as exc:
         slot.release()
         raise exc
@@ -209,7 +213,7 @@ method connect*(
   addrs: seq[MultiAddress],
   forceDial = false,
   reuseConnection = true,
-  upgradeDir = Direction.Out) {.async.} =
+  dir = Direction.Out) {.async.} =
   ## connect remote peer without negotiating
   ## a protocol
   ##
@@ -217,7 +221,7 @@ method connect*(
   if self.connManager.connCount(peerId) > 0 and reuseConnection:
     return
 
-  discard await self.internalConnect(Opt.some(peerId), addrs, forceDial, reuseConnection, upgradeDir)
+  discard await self.internalConnect(Opt.some(peerId), addrs, forceDial, reuseConnection, dir)
 
 method connect*(
   self: Dialer,
@@ -225,20 +229,20 @@ method connect*(
   allowUnknownPeerId = false): Future[PeerId] {.async.} =
   ## Connects to a peer and retrieve its PeerId
 
-  let fullAddress = parseFullAddress(address)
-  if fullAddress.isOk:
+  parseFullAddress(address).toOpt().withValue(fullAddress):
     return (await self.internalConnect(
-      Opt.some(fullAddress.get()[0]),
-      @[fullAddress.get()[1]],
-      false)).connection.peerId
-  else:
-    if allowUnknownPeerId == false:
-      raise newException(DialFailedError, "Address without PeerID and unknown peer id disabled!")
-    return (await self.internalConnect(
-      Opt.none(PeerId),
-      @[address],
+      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,
@@ -324,7 +328,7 @@ 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
 

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
@@ -60,7 +57,7 @@ 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].} =
+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 =
@@ -73,7 +70,7 @@ 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
@@ -125,20 +122,15 @@ 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

libp2p/discovery/rendezvousinterface.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 chronos
 import ./discoverymngr,
@@ -22,6 +19,7 @@ type
     rdv*: RendezVous
     timeToRequest: Duration
     timeToAdvertise: Duration
+    ttl: Duration
 
   RdvNamespace* = distinct string
 
@@ -65,12 +63,16 @@ 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)
+          tta: Duration = 1.minutes,
+          ttl: Duration = MinimumDuration): RendezVousInterface =
+  T(rdv: rdv, timeToRequest: ttr, timeToAdvertise: tta, ttl: ttl)

libp2p/errors.nim

@@ -19,7 +19,8 @@ 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:

libp2p/multiaddress.nim

@@ -9,10 +9,7 @@
 
 ## This module implements MultiAddress.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 {.push public.}
 
 import pkg/chronos, chronicles
@@ -401,6 +398,9 @@ const
     MAProtocol(
       mcodec: multiCodec("quic"), kind: Marker, size: 0
     ),
+    MAProtocol(
+      mcodec: multiCodec("quic-v1"), kind: Marker, size: 0
+    ),
     MAProtocol(
       mcodec: multiCodec("ip6zone"), kind: Length, size: 0,
       coder: TranscoderIP6Zone
@@ -419,6 +419,9 @@ const
     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
@@ -471,7 +474,7 @@ const
   IP* = mapOr(IP4, IP6)
   DNS_OR_IP* = mapOr(DNS, IP)
   TCP_DNS* = mapAnd(DNS, mapEq("tcp"))
-  TCP_IP* =mapAnd(IP, 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"))
@@ -482,9 +485,10 @@ const
   WS_DNS* = mapAnd(TCP_DNS, mapEq("ws"))
   WS_IP* = mapAnd(TCP_IP, mapEq("ws"))
   WS* = mapAnd(TCP, mapEq("ws"))
-  WSS_DNS* = mapAnd(TCP_DNS, mapEq("wss"))
-  WSS_IP* = mapAnd(TCP_IP, mapEq("wss"))
-  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)
@@ -775,7 +779,7 @@ 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
@@ -954,7 +958,7 @@ proc init*(mtype: typedesc[MultiAddress]): MultiAddress =
   ## Initialize empty MultiAddress.
   result.data = initVBuffer()
 
-proc init*(mtype: typedesc[MultiAddress], address: ValidIpAddress,
+proc init*(mtype: typedesc[MultiAddress], address: IpAddress,
            protocol: IpTransportProtocol, port: Port): MultiAddress =
   var res: MultiAddress
   res.data = initVBuffer()
@@ -1025,7 +1029,7 @@ proc append*(m1: var MultiAddress, m2: MultiAddress): MaResult[void] =
     ok()
 
 proc `&`*(m1, m2: MultiAddress): MultiAddress {.
-     raises: [Defect, LPError].} =
+     raises: [LPError].} =
   ## Concatenates two addresses ``m1`` and ``m2``, and returns result.
   ##
   ## This procedure performs validation of concatenated result and can raise
@@ -1035,7 +1039,7 @@ proc `&`*(m1, m2: MultiAddress): MultiAddress {.
   concat(m1, m2).tryGet()
 
 proc `&=`*(m1: var MultiAddress, m2: MultiAddress) {.
-     raises: [Defect, LPError].} =
+     raises: [LPError].} =
   ## Concatenates two addresses ``m1`` and ``m2``.
   ##
   ## This procedure performs validation of concatenated result and can raise
@@ -1079,19 +1083,15 @@ proc matchPart(pat: MaPattern, protos: seq[MultiCodec]): MaPatResult =
 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():
-    return false
-  let res = matchPart(pat, protos.get())
+  let protos = address.protocols().valueOr: return false
+  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():
-    return false
-  let res = matchPart(pat, protos.get())
+  let protos = address.protocols().valueOr: return false
+  let res = matchPart(pat, protos)
   res.flag
 
 proc `$`*(pat: MaPattern): string =
@@ -1120,12 +1120,8 @@ proc getField*(pb: ProtoBuffer, field: int,
   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] {.
@@ -1141,11 +1137,11 @@ proc getRepeatedField*(pb: ProtoBuffer, field: int,
     ok(false)
   else:
     for item in items:
-      let ma = MultiAddress.init(item)
-      if ma.isOk():
-        value.add(ma.get())
-      else:
-        debug "Not supported MultiAddress in blob", ma = item
+      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:

libp2p/multibase.nim

@@ -13,10 +13,7 @@
 ## 1. base32z
 ##
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables
 import stew/[base32, base58, base64, results]
@@ -27,17 +24,17 @@ type
 
   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].}
+               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: [Defect].}
+               outlen: var int): MultiBaseStatus {.nimcall, gcsafe, noSideEffect, raises: [].}
     encl: MBCodeSize
     decl: MBCodeSize
 

libp2p/multicodec.nim

@@ -9,10 +9,7 @@
 
 ## This module implements MultiCodec.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import tables, hashes
 import varint, vbuffer
@@ -194,9 +191,11 @@ 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

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]
@@ -45,7 +42,7 @@ const
 
 type
   MHashCoderProc* = proc(data: openArray[byte],
-                         output: var openArray[byte]) {.nimcall, gcsafe, noSideEffect, raises: [Defect].}
+                         output: var openArray[byte]) {.nimcall, gcsafe, noSideEffect, raises: [].}
   MHash* = object
     mcodec*: MultiCodec
     size*: int

libp2p/multistream.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/[strutils, sequtils, tables]
 import chronos, chronicles, stew/byteutils
@@ -28,7 +25,7 @@ const
   Ls = "ls\n"
 
 type
-  Matcher* = proc (proto: string): bool {.gcsafe, raises: [Defect].}
+  Matcher* = proc (proto: string): bool {.gcsafe, raises: [].}
 
   MultiStreamError* = object of LPError
 
@@ -134,7 +131,7 @@ proc handle*(
   protos: seq[string],
   matchers = newSeq[Matcher](),
   active: bool = false,
-  ): Future[string] {.async, gcsafe.} =
+  ): Future[string] {.async.} =
   trace "Starting multistream negotiation", conn, handshaked = active
   var handshaked = active
   while not conn.atEof:
@@ -175,10 +172,9 @@ proc handle*(
       trace "no handlers", conn, protocol = ms
       await conn.writeLp(Na)
 
-proc handle*(m: MultistreamSelect, conn: Connection, active: bool = false) {.async, gcsafe.} =
+proc handle*(m: MultistreamSelect, conn: Connection, active: bool = false) {.async.} =
   trace "Starting multistream handler", conn, handshaked = active
   var
-    handshaked = active
     protos: seq[string]
     matchers: seq[Matcher]
   for h in m.handlers:

libp2p/muxers/mplex/coder.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 pkg/[chronos, chronicles, stew/byteutils]
 import ../../stream/connection,
@@ -45,7 +42,7 @@ 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.} =
   let header = await conn.readVarint()
   trace "read header varint", varint = header, conn
 

libp2p/muxers/mplex/lpchannel.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/[oids, strformat]
 import pkg/[chronos, chronicles, metrics]
@@ -76,7 +73,7 @@ func shortLog*(s: LPChannel): auto =
 
 chronicles.formatIt(LPChannel): shortLog(it)
 
-proc open*(s: LPChannel) {.async, gcsafe.} =
+proc open*(s: LPChannel) {.async.} =
   trace "Opening channel", s, conn = s.conn
   if s.conn.isClosed:
     return
@@ -98,7 +95,7 @@ proc closeUnderlying(s: LPChannel): Future[void] {.async.} =
   if s.closedLocal and s.atEof():
     await procCall BufferStream(s).close()
 
-proc reset*(s: LPChannel) {.async, gcsafe.} =
+proc reset*(s: LPChannel) {.async.} =
   if s.isClosed:
     trace "Already closed", s
     return
@@ -126,7 +123,7 @@ proc reset*(s: LPChannel) {.async, gcsafe.} =
 
   trace "Channel reset", s
 
-method close*(s: LPChannel) {.async, gcsafe.} =
+method close*(s: LPChannel) {.async.} =
   ## 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.

libp2p/muxers/mplex/mplex.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 tables, sequtils, oids
 import chronos, chronicles, stew/byteutils, metrics
@@ -79,7 +76,7 @@ proc newStreamInternal*(m: Mplex,
                         chanId: uint64 = 0,
                         name: string = "",
                         timeout: Duration): LPChannel
-                        {.gcsafe, raises: [Defect, InvalidChannelIdError].} =
+                        {.gcsafe, raises: [InvalidChannelIdError].} =
   ## create new channel/stream
   ##
   let id = if initiator:
@@ -125,7 +122,7 @@ proc handleStream(m: Mplex, chann: LPChannel) {.async.} =
     trace "Exception in mplex stream handler", m, chann, msg = exc.msg
     await chann.reset()
 
-method handle*(m: Mplex) {.async, gcsafe.} =
+method handle*(m: Mplex) {.async.} =
   trace "Starting mplex handler", m
   try:
     while not m.connection.atEof:
@@ -214,7 +211,7 @@ proc new*(M: type Mplex,
 
 method newStream*(m: Mplex,
                   name: string = "",
-                  lazy: bool = false): Future[Connection] {.async, gcsafe.} =
+                  lazy: bool = false): Future[Connection] {.async.} =
   let channel = m.newStreamInternal(timeout = m.inChannTimeout)
 
   if not lazy:
@@ -222,7 +219,7 @@ method newStream*(m: Mplex,
 
   return Connection(channel)
 
-method close*(m: Mplex) {.async, gcsafe.} =
+method close*(m: Mplex) {.async.} =
   if m.isClosed:
     trace "Already closed", m
     return

libp2p/muxers/muxer.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 chronos, chronicles
 import ../stream/connection,
@@ -26,8 +23,8 @@ 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] {.gcsafe, raises: [].}
+  MuxerHandler* = proc(muxer: Muxer): Future[void] {.gcsafe, raises: [].}
 
   Muxer* = ref object of RootObj
     streamHandler*: StreamHandler
@@ -35,7 +32,7 @@ type
     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* = object
@@ -49,11 +46,11 @@ 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.} =
+  Future[Connection] {.base, async.} = discard
+method close*(m: Muxer) {.base, async.} =
   if not isNil(m.connection):
     await m.connection.close()
-method handle*(m: Muxer): Future[void] {.base, async, gcsafe.} = discard
+method handle*(m: Muxer): Future[void] {.base, async.} = discard
 
 proc new*(
   T: typedesc[MuxerProvider],

libp2p/muxers/yamux/yamux.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 sequtils, std/[tables]
 import chronos, chronicles, metrics, stew/[endians2, byteutils, objects]
@@ -25,15 +22,16 @@ 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]
+    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, 1600.0, 6400.0, 25600.0, 256000.0]
+    buckets = [0.0, 100.0, 250.0, 1000.0, 2000.0, 3200.0, 6400.0, 25600.0, 256000.0]
 
 type
   YamuxError* = object of CatchableError
@@ -62,7 +60,7 @@ type
     streamId: uint32
     length: uint32
 
-proc readHeader(conn: LPStream): Future[YamuxHeader] {.async, gcsafe.} =
+proc readHeader(conn: LPStream): Future[YamuxHeader] {.async.} =
   var buffer: array[12, byte]
   await conn.readExactly(addr buffer[0], 12)
 
@@ -146,6 +144,7 @@ type
     recvWindow: int
     sendWindow: int
     maxRecvWindow: int
+    maxSendQueueSize: int
     conn: Connection
     isSrc: bool
     opened: bool
@@ -172,9 +171,18 @@ proc `$`(channel: YamuxChannel): string =
   if s.len > 0:
     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 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.} =
   if channel.closedLocally and channel.sendQueue.len == 0 and
@@ -186,15 +194,19 @@ proc remoteClosed(channel: YamuxChannel) {.async.} =
     channel.closedRemotely.complete()
     await channel.actuallyClose()
 
-method closeImpl*(channel: YamuxChannel) {.async, gcsafe.} =
+method closeImpl*(channel: YamuxChannel) {.async.} =
   if not channel.closedLocally:
     channel.closedLocally = true
+    channel.isEof = true
 
     if channel.isReset == false and channel.sendQueue.len == 0:
       await channel.conn.write(YamuxHeader.data(channel.id, 0, {Fin}))
     await channel.actuallyClose()
 
 proc reset(channel: YamuxChannel, isLocal: bool = false) {.async.} =
+  # 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"
@@ -215,11 +227,14 @@ proc reset(channel: YamuxChannel, isLocal: bool = false) {.async.} =
     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.} =
+  ## 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
@@ -237,6 +252,7 @@ method readOnce*(
   pbytes: pointer,
   nbytes: int):
   Future[int] {.async.} =
+  ## Read from a yamux channel
 
   if channel.isReset:
     raise if channel.remoteReset:
@@ -252,6 +268,7 @@ method readOnce*(
     await channel.closedRemotely or channel.receivedData.wait()
     if channel.closedRemotely.done() and channel.recvQueue.len == 0:
       channel.returnedEof = true
+      channel.isEof = true
       return 0
 
   let toRead = min(channel.recvQueue.len, nbytes)
@@ -281,21 +298,22 @@ proc trySend(channel: YamuxChannel) {.async.} =
     return
   channel.isSending = true
   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)
+      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()
         try:
           await channel.reset(true)
         except CatchableError as exc:
-          debug "failed to reset", msg=exc.msg
+          warn "failed to reset", msg=exc.msg
       break
 
     let
-      bytesAvailable = channel.sendQueueBytes()
+      bytesAvailable = channel.lengthSendQueue()
       toSend = min(channel.sendWindow, bytesAvailable)
     var
       sendBuffer = newSeqUninitialized[byte](toSend + 12)
@@ -310,20 +328,24 @@ proc trySend(channel: YamuxChannel) {.async.} =
 
     var futures: seq[Future[void]]
     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)
       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:
+      trace "failed to send the buffer"
       let connDown = newLPStreamConnDownError(exc)
       for fut in futures.items():
         fut.fail(connDown)
@@ -334,6 +356,8 @@ proc trySend(channel: YamuxChannel) {.async.} =
     channel.activity = true
 
 method write*(channel: YamuxChannel, msg: seq[byte]): Future[void] =
+  ## Write to yamux channel
+  ##
   result = newFuture[void]("Yamux Send")
   if channel.remoteReset:
     result.fail(newLPStreamResetError())
@@ -346,15 +370,20 @@ 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.} =
+  ## 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}))
 
 method getWrapped*(channel: YamuxChannel): Connection = channel.conn
 
@@ -365,12 +394,14 @@ type
     currentId: uint32
     isClosed: bool
     maxChannCount: int
+    windowSize: int
+    maxSendQueueSize: int
 
 proc lenBySrc(m: Yamux, isSrc: bool): int =
   for v in m.channels.values():
     if v.isSrc == isSrc: result += 1
 
-proc cleanupChann(m: Yamux, channel: YamuxChannel) {.async.} =
+proc cleanupChannel(m: Yamux, channel: YamuxChannel) {.async.} =
   await channel.join()
   m.channels.del(channel.id)
   when defined(libp2p_yamux_metrics):
@@ -378,12 +409,19 @@ proc cleanupChann(m: Yamux, channel: YamuxChannel) {.async.} =
   if channel.isReset and channel.recvWindow > 0:
     m.flushed[channel.id] = channel.recvWindow
 
-proc createStream(m: Yamux, id: uint32, isSrc: bool): YamuxChannel =
+proc createStream(m: Yamux, id: uint32, isSrc: bool,
+                  recvWindow: int, maxSendQueueSize: int): YamuxChannel =
+  # As you can see, 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
   result = 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(),
@@ -401,7 +439,7 @@ proc createStream(m: Yamux, id: uint32, isSrc: bool): YamuxChannel =
   when defined(libp2p_agents_metrics):
     result.shortAgent = m.connection.shortAgent
   m.channels[id] = result
-  asyncSpawn m.cleanupChann(result)
+  asyncSpawn m.cleanupChannel(result)
   trace "created channel", id, pid=m.connection.peerId
   when defined(libp2p_yamux_metrics):
     libp2p_yamux_channels.set(m.lenBySrc(isSrc).int64, [$isSrc, $result.peerId])
@@ -422,7 +460,7 @@ method close*(m: Yamux) {.async.} =
   trace "Closed yamux"
 
 proc handleStream(m: Yamux, channel: YamuxChannel) {.async.} =
-  ## call the muxer stream handler for this channel
+  ## Call the muxer stream handler for this channel
   ##
   try:
     await m.streamHandler(channel)
@@ -432,7 +470,7 @@ proc handleStream(m: Yamux, channel: YamuxChannel) {.async.} =
     trace "Exception in yamux stream handler", msg = exc.msg
     await channel.reset()
 
-method handle*(m: Yamux) {.async, gcsafe.} =
+method handle*(m: Yamux) {.async.} =
   trace "Starting yamux handler", pid=m.connection.peerId
   try:
     while not m.connection.atEof:
@@ -456,9 +494,11 @@ method handle*(m: Yamux) {.async, gcsafe.} =
           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
@@ -514,19 +554,24 @@ method getStreams*(m: Yamux): seq[Connection] =
 method newStream*(
   m: Yamux,
   name: string = "",
-  lazy: bool = false): Future[Connection] {.async, gcsafe.} =
+  lazy: bool = false): Future[Connection] {.async.} =
 
   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): T =
   T(
     connection: conn,
     currentId: if conn.dir == Out: 1 else: 2,
-    maxChannCount: maxChannCount
+    maxChannCount: maxChannCount,
+    windowSize: windowSize,
+    maxSendQueueSize: maxSendQueueSize
   )

libp2p/nameresolving/dnsresolver.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/[streams, strutils, sets, sequtils],

libp2p/nameresolving/mockresolver.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/tables,

libp2p/nameresolving/nameresolver.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/[sugar, sets, sequtils, strutils]
 import
@@ -55,7 +52,7 @@ proc resolveOneAddress(
   ma: MultiAddress,
   domain: Domain = Domain.AF_UNSPEC,
   prefix = ""): Future[seq[MultiAddress]]
-  {.async, raises: [Defect, MaError, TransportAddressError].} =
+  {.async.} =
   #Resolve a single address
   var pbuf: array[2, byte]
 
@@ -121,7 +118,7 @@ proc resolveMAddress*(
   if not DNS.matchPartial(address):
     res.incl(address)
   else:
-    let code = address[0].get().protoCode().get()
+    let code = address[0].tryGet().protoCode().tryGet()
     let seq = case code:
       of multiCodec("dns"):
         await self.resolveOneAddress(address)
@@ -132,7 +129,7 @@ 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

@@ -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
-  std/[sequtils, tables],
-  chronos, chronicles,
-  multiaddress, multicodec
+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.
@@ -36,14 +32,16 @@ proc getProtocol(self: ObservedAddrManager, observations: seq[MultiAddress], mul
   countTable.sort()
   var orderedPairs = toSeq(countTable.pairs)
   for (ma, count) in orderedPairs:
-    let maFirst = ma[0].get()
-    if maFirst.protoCode.get() == multiCodec and count >= self.minCount:
+    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 = self.observedIPsAndPorts.mapIt(it[0].get())
+  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] =
@@ -54,34 +52,24 @@ 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]
-  let ip4 = self.getMostObservedProtoAndPort(multiCodec("ip4"))
-  if ip4.isSome():
-    res.add(ip4.get())
-  let ip6 = self.getMostObservedProtoAndPort(multiCodec("ip6"))
-  if ip6.isSome():
-    res.add(ip6.get())
+  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 valeu of each listen address by the corresponding (matching the proto code) most observed value.
+  ## 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.
-  try:
-    let maFirst = ma[0]
-    let maRest = ma[1..^1]
-    if maRest.isErr():
-      return ma
+  let
+    maFirst = ma[0].valueOr: return ma
+    maRest = ma[1..^1].valueOr: return ma
+    maFirstProto = maFirst.protoCode().valueOr: return ma
 
-    let observedIP = self.getMostObservedProtocol(maFirst.get().protoCode().get())
-    return
-      if observedIP.isNone() or maFirst.get() == observedIP.get():
-        ma
-      else:
-        observedIP.get() & maRest.get()
-  except CatchableError as error:
-    debug "Error while handling manual port forwarding", msg = error.msg
-    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.

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
@@ -44,10 +41,7 @@ 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
 
@@ -191,19 +185,11 @@ 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
 

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
 
@@ -26,7 +23,7 @@ type
 
   AddressMapper* =
     proc(listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]]
-      {.gcsafe, raises: [Defect].}
+      {.gcsafe, raises: [].}
 
   PeerInfo* {.public.} = ref object
     peerId*: PeerId
@@ -56,15 +53,12 @@ proc update*(p: PeerInfo) {.async.} =
   for mapper in p.addressMappers:
     p.addrs = await mapper(p.addrs)
 
-  let sprRes = SignedPeerRecord.init(
+  p.signedPeerRecord = 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"
+  ).valueOr():
+    info "Can't update the signed peer record"
+    return
 
 proc addrs*(p: PeerInfo): seq[MultiAddress] =
   p.addrs
@@ -99,7 +93,7 @@ proc new*(
   agentVersion: string = "",
   addressMappers = newSeq[AddressMapper](),
   ): PeerInfo
-  {.raises: [Defect, LPError].} =
+  {.raises: [LPError].} =
 
   let pubkey = try:
       key.getPublicKey().tryGet()

libp2p/peerstore.nim

@@ -16,15 +16,12 @@ 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],
@@ -45,7 +42,7 @@ type
   # Handler types #
   #################
 
-  PeerBookChangeHandler* = proc(peerId: PeerId) {.gcsafe, raises: [Defect].}
+  PeerBookChangeHandler* = proc(peerId: PeerId) {.gcsafe, raises: [].}
 
   #########
   # Books #
@@ -161,20 +158,20 @@ proc updatePeerInfo*(
   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:
@@ -210,11 +207,11 @@ proc identify*(
       let info = await peerStore.identify.identify(stream, stream.peerId)
 
       when defined(libp2p_agents_metrics):
-        var knownAgent = "unknown"
-        if info.agentVersion.isSome and info.agentVersion.get().len > 0:
-          let shortAgent = info.agentVersion.get().split("/")[0].safeToLowerAscii()
-          if shortAgent.isOk() and KnownLibP2PAgentsSeq.contains(shortAgent.get()):
-            knownAgent = shortAgent.get()
+        var
+          knownAgent = "unknown"
+          shortAgent = info.agentVersion.get("").split("/")[0].safeToLowerAscii().get("")
+        if KnownLibP2PAgentsSeq.contains(shortAgent):
+          knownAgent = shortAgent
         muxer.connection.setShortAgent(knownAgent)
 
       peerStore.updatePeerInfo(info)

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
@@ -579,26 +576,18 @@ proc getField*[T: seq[byte]|string](data: ProtoBuffer, field: int,
 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)
+  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] =
@@ -678,14 +667,10 @@ proc getRepeatedField*[T: ProtoScalar](data: ProtoBuffer, field: int,
 
 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)
+  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] =

libp2p/protocols/connectivity/autonat/client.nim

@@ -7,12 +7,8 @@
 # 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
 import stew/results
 import chronos, chronicles
 import ../../../switch,
@@ -27,8 +23,8 @@ 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),
+  let pb = AutonatDial(peerInfo: Opt.some(AutonatPeerInfo(
+                         id: Opt.some(pid),
                          addrs: addrs
                        ))).encode()
   await conn.writeLp(pb.buffer)
@@ -36,15 +32,13 @@ proc sendDial(conn: Connection, pid: PeerId, addrs: seq[MultiAddress]) {.async.}
 method dialMe*(self: AutonatClient, switch: Switch, pid: PeerId, addrs: seq[MultiAddress] = newSeq[MultiAddress]()):
     Future[MultiAddress] {.base, async.} =
 
-  proc getResponseOrRaise(autonatMsg: Option[AutonatMsg]): AutonatDialResponse {.raises: [Defect, 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()
+  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:
@@ -69,7 +63,7 @@ method dialMe*(self: AutonatClient, switch: Switch, pid: PeerId, addrs: seq[Mult
   let response = getResponseOrRaise(AutonatMsg.decode(await conn.readLp(1024)))
   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(""))
     else:

libp2p/protocols/connectivity/autonat/core.nim

@@ -7,12 +7,8 @@
 # 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]
 import stew/[results, objects]
 import chronos, chronicles
 import ../../../multiaddress,
@@ -42,29 +38,29 @@ 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()
@@ -73,8 +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()
@@ -84,72 +80,60 @@ 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

@@ -7,12 +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/[options, sets, sequtils]
+import std/[sets, sequtils]
 import stew/results
 import chronos, chronicles
 import ../../protocol,
@@ -36,8 +33,8 @@ type
     dialTimeout: Duration
 
 proc sendDial(conn: Connection, pid: PeerId, addrs: seq[MultiAddress]) {.async.} =
-  let pb = AutonatDial(peerInfo: some(AutonatPeerInfo(
-                         id: some(pid),
+  let pb = AutonatDial(peerInfo: Opt.some(AutonatPeerInfo(
+                         id: Opt.some(pid),
                          addrs: addrs
                        ))).encode()
   await conn.writeLp(pb.buffer)
@@ -45,16 +42,16 @@ proc sendDial(conn: Connection, pid: PeerId, addrs: seq[MultiAddress]) {.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)
+             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)
+             text: Opt.some("Ok"),
+             ma: Opt.some(ma)
            ).encode()
   await conn.writeLp(pb.buffer)
 
@@ -73,8 +70,8 @@ proc tryDial(autonat: Autonat, conn: Connection, addrs: seq[MultiAddress]) {.asy
     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:
@@ -95,42 +92,40 @@ 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():
+  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]
-  if hostIp.isErr() or not IP.match(hostIp.get()):
-    trace "wrong observed address", address=observedAddr
+  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():
-      continue
-    let maFirst = ma[0]
-    if maFirst.isErr() or not DNS_OR_IP.match(maFirst.get()):
-      continue
+    isRelayed = ma.contains(multiCodec("p2p-circuit")).valueOr: continue
+    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
@@ -145,12 +140,12 @@ proc handleDial(autonat: Autonat, conn: Connection, msg: AutonatMsg): Future[voi
 
 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 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

@@ -7,12 +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/[options, deques, sequtils]
+import std/[deques, sequtils]
 import chronos, metrics
 import ../../../switch
 import ../../../wire
@@ -21,7 +18,7 @@ from core import NetworkReachability, AutonatUnreachableError
 import ../../../utils/heartbeat
 import ../../../crypto/crypto
 
-export options, core.NetworkReachability
+export core.NetworkReachability
 
 logScope:
   topics = "libp2p autonatservice"
@@ -34,12 +31,12 @@ type
     addressMapper: AddressMapper
     scheduleHandle: Future[void]
     networkReachability*: NetworkReachability
-    confidence: Option[float]
+    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
@@ -47,13 +44,13 @@ type
     dialTimeout: Duration
     enableAddressMapper: bool
 
-  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),
+  scheduleInterval: Opt[Duration] = Opt.none(Duration),
   askNewConnectedPeers = true,
   numPeersToAsk: int = 5,
   maxQueueSize: int = 10,
@@ -63,7 +60,7 @@ proc new*(
   return T(
     scheduleInterval: scheduleInterval,
     networkReachability: Unknown,
-    confidence: none(float),
+    confidence: Opt.none(float),
     answers: initDeque[NetworkReachability](),
     autonatClient: autonatClient,
     rng: rng,
@@ -85,27 +82,33 @@ proc hasEnoughIncomingSlots(switch: Switch): bool =
 proc doesPeerHaveIncomingConn(switch: Switch, peerId: PeerId): bool =
   return switch.connManager.selectMuxer(peerId, In) != nil
 
-proc handleAnswer(self: AutonatService, ans: NetworkReachability) {.async.} =
+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])
     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
 
+  # 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
@@ -132,9 +135,9 @@ 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
 
@@ -159,7 +162,7 @@ proc schedule(service: AutonatService, switch: Switch, interval: Duration) {.asy
 proc addressMapper(
   self: AutonatService,
   peerStore: PeerStore,
-  listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.gcsafe, async.} =
+  listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.async.} =
 
   if self.networkReachability != NetworkReachability.Reachable:
     return listenAddrs
@@ -168,8 +171,7 @@ proc addressMapper(
   for listenAddr in listenAddrs:
     var processedMA = listenAddr
     try:
-      let hostIP = initTAddress(listenAddr).get()
-      if not hostIP.isGlobal() and self.networkReachability == NetworkReachability.Reachable:
+      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
@@ -177,7 +179,7 @@ proc addressMapper(
   return addrs
 
 method setup*(self: AutonatService, switch: Switch): Future[bool] {.async.} =
-  self.addressMapper = proc (listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.gcsafe, async.} =
+  self.addressMapper = proc (listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.async.} =
     return await addressMapper(self, switch.peerStore, listenAddrs)
 
   info "Setting up AutonatService"
@@ -187,8 +189,8 @@ method setup*(self: AutonatService, switch: Switch): Future[bool] {.async.} =
       self.newConnectedPeerHandler = proc (peerId: PeerId, event: PeerEvent): Future[void] {.async.} =
         discard askPeer(self, switch, peerId)
       switch.connManager.addPeerEventHandler(self.newConnectedPeerHandler, PeerEventKind.Joined)
-    if self.scheduleInterval.isSome():
-      self.scheduleHandle = schedule(self, switch, self.scheduleInterval.get())
+    self.scheduleInterval.withValue(interval):
+      self.scheduleHandle = schedule(self, switch, interval)
     if self.enableAddressMapper:
       switch.peerInfo.addressMappers.add(self.addressMapper)
   return hasBeenSetup
@@ -196,7 +198,6 @@ method setup*(self: AutonatService, switch: Switch): Future[bool] {.async.} =
 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"

libp2p/protocols/connectivity/dcutr/client.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
 
@@ -69,7 +66,7 @@ proc startSync*(self: DcutrClient, switch: Switch, remotePeerId: PeerId, addrs:
 
     if peerDialableAddrs.len > self.maxDialableAddrs:
         peerDialableAddrs = peerDialableAddrs[0..<self.maxDialableAddrs]
-    var futs = peerDialableAddrs.mapIt(switch.connect(stream.peerId, @[it], forceDial = true, reuseConnection = false))
+    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."
@@ -84,8 +81,8 @@ proc startSync*(self: DcutrClient, switch: Switch, remotePeerId: PeerId, addrs:
     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 trying direct conn", err = err.msg
-    raise newException(DcutrError, "Unexpected error when trying a direct conn", 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

@@ -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
 
@@ -44,7 +41,7 @@ proc encode*(msg: DcutrMsg): ProtoBuffer =
     result.write(2, addr)
   result.finish()
 
-proc decode*(_: typedesc[DcutrMsg], buf: seq[byte]): DcutrMsg {.raises: [Defect, DcutrError].} =
+proc decode*(_: typedesc[DcutrMsg], buf: seq[byte]): DcutrMsg {.raises: [DcutrError].} =
   var
     msgTypeOrd: uint32
     dcutrMsg: DcutrMsg
@@ -59,5 +56,10 @@ 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] =
-  addrs.filterIt(TCP.match(it))
+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

@@ -7,13 +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: [].}
-
-import std/[options, sets, sequtils]
+{.push raises: [].}
 
+import std/[sets, sequtils]
 import stew/[results, objects]
 import chronos, chronicles
 
@@ -33,7 +29,7 @@ logScope:
 
 proc new*(T: typedesc[Dcutr], switch: Switch, connectTimeout = 15.seconds, maxDialableAddrs = 8): T =
 
-  proc handleStream(stream: Connection, proto: string) {.async, gcsafe.} =
+  proc handleStream(stream: Connection, proto: string) {.async.} =
     var peerDialableAddrs: seq[MultiAddress]
     try:
       let connectMsg = DcutrMsg.decode(await stream.readLp(1024))
@@ -60,7 +56,7 @@ proc new*(T: typedesc[Dcutr], switch: Switch, connectTimeout = 15.seconds, maxDi
 
       if peerDialableAddrs.len > maxDialableAddrs:
         peerDialableAddrs = peerDialableAddrs[0..<maxDialableAddrs]
-      var futs = peerDialableAddrs.mapIt(switch.connect(stream.peerId, @[it], forceDial = true, reuseConnection = false, upgradeDir = Direction.In))
+      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."
@@ -75,8 +71,8 @@ proc new*(T: typedesc[Dcutr], switch: Switch, connectTimeout = 15.seconds, maxDi
       debug "Dcutr receiver could not connect to the remote peer, all connect attempts timed out", peerDialableAddrs, msg = err.msg
       raise newException(DcutrError, "Dcutr receiver could not connect to the remote peer, all connect attempts timed out", err)
     except CatchableError as err:
-      warn "Unexpected error in dcutr handler", msg = err.msg
-      raise newException(DcutrError, "Unexpected error in dcutr handler", err)
+      warn "Unexpected error when Dcutr receiver tried to connect to the remote peer", msg = err.msg
+      raise newException(DcutrError, "Unexpected error when Dcutr receiver tried to connect to the remote peer", err)
 
   let self = T()
   self.handler = handleStream

libp2p/protocols/connectivity/relay/client.nim

@@ -7,15 +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 times, options
+{.push raises: [].}
 
+import times
 import chronos, chronicles
-
 import ./relay,
        ./messages,
        ./rconn,
@@ -25,8 +20,6 @@ import ./relay,
        ../../../multiaddress,
        ../../../stream/connection
 
-export options
-
 logScope:
   topics = "libp2p relay relay-client"
 
@@ -39,7 +32,7 @@ type
   RelayV2DialError* = object of RelayClientError
   RelayClientAddConn* = proc(conn: Connection,
                         duration: uint32,
-                        data: uint64): Future[void] {.gcsafe, raises: [Defect].}
+                        data: uint64): Future[void] {.gcsafe, raises: [].}
   RelayClient* = ref object of Relay
     onNewConnection*: RelayClientAddConn
     canHop: bool
@@ -47,28 +40,27 @@ type
   Rsvp* = object
     expire*: uint64           # required, Unix expiration time (UTC)
     addrs*: seq[MultiAddress] # relay address for reserving peer
-    voucher*: Option[Voucher] # optional, reservation voucher
+    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
   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))
+      status: Opt.some(Ok))
     pb = encode(msg)
 
   trace "incoming relay connection", src
@@ -92,7 +84,7 @@ proc reserve*(cl: RelayClient,
     pb = encode(HopMessage(msgType: HopMessageType.Reserve))
     msg = try:
       await conn.writeLp(pb.buffer)
-      HopMessage.decode(await conn.readLp(RelayClientMsgSize)).get()
+      HopMessage.decode(await conn.readLp(RelayClientMsgSize)).tryGet()
     except CancelledError as exc:
       raise exc
     except CatchableError as exc:
@@ -103,21 +95,21 @@ proc reserve*(cl: RelayClient,
     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:
     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
@@ -129,9 +121,9 @@ proc dialPeerV1*(
     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
@@ -154,16 +146,18 @@ proc dialPeerV1*(
     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:
+    if msgRcvFromRelay.msgType.tryGet() != RelayType.Status:
       raise newException(RelayV1DialError, "Hop can't open destination stream: wrong message type")
-    if msgRcvFromRelay.status.isNone or msgRcvFromRelay.status.get() != StatusV1.Success:
+    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*(
@@ -173,13 +167,13 @@ proc dialPeerV2*(
     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()
+    HopMessage.decode(await conn.readLp(RelayClientMsgSize)).tryGet()
   except CancelledError as exc:
     raise exc
   except CatchableError as exc:
@@ -189,19 +183,17 @@ proc dialPeerV2*(
   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)
@@ -209,17 +201,15 @@ proc handleStopStreamV2(cl: RelayClient, conn: Connection) {.async, gcsafe.} =
     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
@@ -236,14 +226,17 @@ proc handleStop(cl: RelayClient, conn: Connection, msg: RelayMessage) {.async, g
   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:
+  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: await sendStatus(conn, StatusV1.HopCantSpeakRelay)
@@ -273,7 +266,7 @@ proc new*(T: typedesc[RelayClient], canHop: bool = false,
              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 RelayV1Codec: await cl.handleStreamV1(conn)

libp2p/protocols/connectivity/relay/messages.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: [].}
 
-import options, macros
-import stew/objects
+import macros
+import stew/[objects, results]
 import ../../../peerinfo,
        ../../../signed_envelope
 
@@ -49,36 +46,36 @@ 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
@@ -88,38 +85,29 @@ 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():
+      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 none(RelayMessage)
-    rMsg.status = some(status)
-  some(rMsg)
+      return Opt.none(RelayMessage)
+    rMsg.status = Opt.some(status)
+  Opt.some(rMsg)
 
 # Voucher
 
@@ -179,7 +167,7 @@ type
   Reservation* = object
     expire*: uint64              # required, Unix expiration time (UTC)
     addrs*: seq[MultiAddress]    # relay address for reserving peer
-    svoucher*: Option[seq[byte]] # optional, reservation voucher
+    svoucher*: Opt[seq[byte]]    # optional, reservation voucher
   Limit* = object
     duration*: uint32            # seconds
     data*: uint64                # bytes
@@ -199,30 +187,29 @@ type
     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:
@@ -231,66 +218,51 @@ proc encode*(msg: HopMessage): ProtoBuffer =
     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():
+    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 none(HopMessage)
-    msg.status = some(status)
-  some(msg)
+      return Opt.none(HopMessage)
+    msg.status = Opt.some(status)
+  Opt.some(msg)
 
 # Circuit Relay V2 Stop Message
 
@@ -300,19 +272,19 @@ type
     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)
@@ -322,52 +294,40 @@ proc encode*(msg: StopMessage): ProtoBuffer =
     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():
+
+
+  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 none(StopMessage)
-    msg.status = some(status)
-  some(msg)
+      return Opt.none(StopMessage)
+    msg.status = Opt.some(status)
+  Opt.some(msg)

libp2p/protocols/connectivity/relay/rconn.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 chronos
 
@@ -50,6 +47,7 @@ proc new*(
   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.} =

libp2p/protocols/connectivity/relay/relay.nim

@@ -7,12 +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 options, sequtils, tables
+import sequtils, tables
 
 import chronos, chronicles
 
@@ -93,11 +90,11 @@ proc createReserveResponse(
     rsrv = Reservation(expire: expireUnix,
                        addrs: r.switch.peerInfo.addrs.mapIt(
                          ? it.concat(ma).orErr(CryptoError.KeyError)),
-                       svoucher: some(? sv.encode))
+                       svoucher: Opt.some(? sv.encode))
     msg = HopMessage(msgType: HopMessageType.Status,
-                     reservation: some(rsrv),
+                     reservation: Opt.some(rsrv),
                      limit: r.limit,
-                     status: some(Ok))
+                     status: Opt.some(Ok))
   return ok(msg)
 
 proc isRelayed*(conn: Connection): bool =
@@ -108,7 +105,7 @@ 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)
@@ -118,32 +115,30 @@ 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.} =
+                   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)
@@ -176,16 +171,17 @@ proc handleConnect(r: Relay,
 
   proc sendStopMsg() {.async.} =
     let stopMsg = StopMessage(msgType: StopMessageType.Connect,
-                            peer: some(Peer(peerId: src, addrs: @[])),
+                            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")
     if msg.status.get(UnexpectedMessage) != Ok:
       raise newException(SendStopError, "Relay stop failure")
     await connSrc.writeLp(encode(HopMessage(msgType: HopMessageType.Status,
-                                          status: some(Ok))).buffer)
+                                          status: Opt.some(Ok))).buffer)
   try:
     await sendStopMsg()
   except CancelledError as exc:
@@ -204,13 +200,11 @@ 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()
+  trace "relayv2 handle stream", msg = msg
   case msg.msgType:
   of HopMessageType.Reserve: await r.handleReserve(conn)
   of HopMessageType.Connect: await r.handleConnect(conn, msg)
@@ -220,7 +214,7 @@ proc handleHopStreamV2*(r: Relay, conn: Connection) {.async, gcsafe.} =
 
 # 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()
   if r.streamCount + r.rsvp.len() >= r.maxCircuit:
@@ -228,15 +222,14 @@ proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsaf
     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):
@@ -248,9 +241,6 @@ proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsaf
     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:
     trace "refusing connection; too many connection from src or to dst", src, dst
@@ -274,9 +264,9 @@ proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsaf
     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)
@@ -288,12 +278,11 @@ proc handleHop*(r: Relay, connSrc: Connection, msg: RelayMessage) {.async, gcsaf
     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:
     trace "unexcepted relay stop response", msgRcvFromDst
@@ -304,14 +293,17 @@ 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:
+  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)
@@ -344,7 +336,7 @@ proc new*(T: typedesc[Relay],
             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)

libp2p/protocols/connectivity/relay/rtransport.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 sequtils, strutils
 
@@ -40,33 +37,33 @@ method start*(self: RelayTransport, ma: seq[MultiAddress]) {.async.} =
   self.client.onNewConnection = proc(
     conn: Connection,
     duration: uint32 = 0,
-    data: uint64 = 0) {.async, gcsafe, raises: [Defect].} =
+    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)
   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
 
@@ -93,14 +90,18 @@ method dial*(
   self: RelayTransport,
   hostname: string,
   ma: MultiAddress,
-  peerId: Opt[PeerId] = Opt.none(PeerId)): Future[Connection] {.async, gcsafe.} =
-  let address = MultiAddress.init($ma & "/p2p/" & $peerId.get()).tryGet()
-  result = await self.dial(address)
+  peerId: Opt[PeerId] = Opt.none(PeerId)): Future[Connection] {.async.} =
+  peerId.withValue(pid):
+    let address = MultiAddress.init($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

@@ -7,15 +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: [].}
-
-import options
+{.push raises: [].}
 
 import chronos, chronicles
-
 import ./messages,
        ../../../stream/connection
 
@@ -27,24 +21,24 @@ 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.} =
   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)
 
-proc sendHopStatus*(conn: Connection, code: StatusV2) {.async, gcsafe.} =
+proc sendHopStatus*(conn: Connection, code: StatusV2) {.async.} =
   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)
 
 proc sendStopStatus*(conn: Connection, code: StatusV2) {.async.} =
   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)
 

libp2p/protocols/identify.nim

@@ -10,10 +10,7 @@
 ## `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
@@ -24,6 +21,7 @@ import ../protobuf/minprotobuf,
        ../peerid,
        ../crypto/crypto,
        ../multiaddress,
+       ../multicodec,
        ../protocols/protocol,
        ../utility,
        ../errors,
@@ -65,7 +63,7 @@ type
     peer: PeerId,
     newInfo: IdentifyInfo):
     Future[void]
-    {.gcsafe, raises: [Defect], public.}
+    {.gcsafe, raises: [], public.}
 
   IdentifyPush* = ref object of LPProtocol
     identifyHandler: IdentifyPushHandler
@@ -74,30 +72,28 @@ 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"
+    if it.signedPeerRecord.isSome(): "Some"
     else: "None"
 
 proc encodeMsg(peerInfo: PeerInfo, observedAddr: Opt[MultiAddress], sendSpr: bool): ProtoBuffer
-  {.raises: [Defect].} =
+  {.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:
@@ -109,13 +105,12 @@ proc encodeMsg(peerInfo: PeerInfo, observedAddr: Opt[MultiAddress], sendSpr: boo
   ## 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
@@ -125,53 +120,38 @@ 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
+  sendSignedPeerRecord = false,
+  observedAddrManager = ObservedAddrManager.new(),
   ): T =
   let identify = T(
     peerInfo: peerInfo,
     sendSignedPeerRecord: sendSignedPeerRecord,
-    observedAddrManager: ObservedAddrManager.new(),
+    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)
@@ -189,33 +169,31 @@ method init*(p: Identify) =
 
 proc identify*(self: Identify,
                conn: Connection,
-               remotePeerId: PeerId): Future[IdentifyInfo] {.async, gcsafe.} =
+               remotePeerId: PeerId): Future[IdentifyInfo] {.async.} =
   trace "initiating identify", conn
   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():
-    raise newException(IdentityInvalidMsgError, "Incorrect message received!")
+  var info = decodeMsg(message).valueOr: raise newException(IdentityInvalidMsgError, "Incorrect message received!")
+  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)
 
-  var info = infoOpt.get()
-  if info.pubkey.isNone():
-    raise newException(IdentityInvalidMsgError, "No pubkey in identify")
-
-  let peer = PeerId.init(info.pubkey.get())
-  if peer.isErr:
-    raise newException(IdentityInvalidMsgError, $peer.error)
-
-  if peer.get() != 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.get()
+  info.peerId = peer
 
-  if info.observedAddr.isSome:
-    if not self.observedAddrManager.addObservation(info.observedAddr.get()):
-      debug "Observed address is not valid", observedAddr = info.observedAddr.get()
+  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.} =
@@ -226,26 +204,24 @@ 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)
 
-      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 +1,47 @@
+# 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 +1,60 @@
+# 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

@@ -9,10 +9,7 @@
 
 ## `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
@@ -42,7 +39,7 @@ type
   PingHandler* {.public.} = proc (
     peer: PeerId):
     Future[void]
-    {.gcsafe, raises: [Defect].}
+    {.gcsafe, raises: [].}
 
   Ping* = ref object of LPProtocol
     pingHandler*: PingHandler
@@ -54,7 +51,7 @@ proc new*(T: typedesc[Ping], handler: PingHandler = nil, rng: ref HmacDrbgContex
   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]
@@ -74,7 +71,7 @@ method init*(p: Ping) =
 proc ping*(
   p: Ping,
   conn: Connection,
-  ): Future[Duration] {.async, gcsafe, public.} =
+  ): Future[Duration] {.async, public.} =
   ## Sends ping to `conn`, returns the delay
 
   trace "initiating ping", conn

libp2p/protocols/protocol.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 chronos, stew/results
 import ../stream/connection
@@ -25,7 +22,7 @@ type
     conn: Connection,
     proto: string):
     Future[void]
-    {.gcsafe, raises: [Defect].}
+    {.gcsafe, raises: [].}
 
   LPProtocol* = ref object of RootObj
     codecs*: seq[string]
@@ -55,8 +52,8 @@ func `codec=`*(p: LPProtocol, codec: string) =
 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 =
+  handler: LPProtoHandler,
+  maxIncomingStreams: Opt[int] | int = Opt.none(int)): T =
   T(
     codecs: codecs,
     handler: handler,

libp2p/protocols/pubsub/floodsub.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/[sets, hashes, tables]
 import chronos, chronicles, metrics
@@ -18,7 +15,7 @@ import ./pubsub,
        ./pubsubpeer,
        ./timedcache,
        ./peertable,
-       ./rpc/[message, messages],
+       ./rpc/[message, messages, protobuf],
        ../../crypto/crypto,
        ../../stream/connection,
        ../../peerid,
@@ -98,7 +95,16 @@ method unsubscribePeer*(f: FloodSub, peer: PeerId) =
 
 method rpcHandler*(f: FloodSub,
                    peer: PubSubPeer,
-                   rpcMsg: RPCMsg) {.async.} =
+                   data: seq[byte]) {.async.} =
+
+  var rpcMsg = decodeRpcMsg(data).valueOr:
+    debug "failed to decode msg from peer", peer, err = error
+    raise newException(CatchableError, "")
+
+  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)
@@ -223,7 +229,7 @@ method publish*(f: FloodSub,
   return peers.len
 
 method initPubSub*(f: FloodSub)
-  {.raises: [Defect, InitializationError].} =
+  {.raises: [InitializationError].} =
   procCall PubSub(f).initPubSub()
   f.seen = TimedCache[MessageId].init(2.minutes)
   f.seenSalt = newSeqUninitialized[byte](sizeof(Hash))

libp2p/protocols/pubsub/gossipsub.nim

@@ -9,20 +9,18 @@
 
 ## Gossip based publishing
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[sets, sequtils]
 import chronos, chronicles, metrics
+import chronos/ratelimit
 import ./pubsub,
        ./floodsub,
        ./pubsubpeer,
        ./peertable,
        ./mcache,
        ./timedcache,
-       ./rpc/[messages, message],
+       ./rpc/[messages, message, protobuf],
        ../protocol,
        ../../stream/connection,
        ../../peerinfo,
@@ -43,9 +41,14 @@ logScope:
 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_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)")
 
+when defined(libp2p_expensive_metrics):
+  declareCounter(libp2p_pubsub_received_messages, "number of messages received", labels = ["id", "topic"])
+
 proc init*(_: type[GossipSubParams]): GossipSubParams =
   GossipSubParams(
       explicit: true,
@@ -77,7 +80,11 @@ proc init*(_: type[GossipSubParams]): GossipSubParams =
       behaviourPenaltyWeight: -1.0,
       behaviourPenaltyDecay: 0.999,
       disconnectBadPeers: false,
-      enablePX: false
+      enablePX: false,
+      bandwidthEstimatebps: 100_000_000, # 100 Mbps or 12.5 MBps
+      overheadRateLimit: Opt.none(tuple[bytes: int, interval: Duration]),
+      disconnectPeerAboveRateLimit: false,
+      maxDurationInNonPriorityQueue: Opt.none(Duration),
     )
 
 proc validateParameters*(parameters: GossipSubParams): Result[void, cstring] =
@@ -150,7 +157,7 @@ method init*(g: GossipSub) =
   g.codecs &= GossipSubCodec
   g.codecs &= GossipSubCodec_10
 
-method onNewPeer(g: GossipSub, peer: PubSubPeer) =
+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
@@ -158,7 +165,11 @@ method onNewPeer(g: GossipSub, peer: PubSubPeer) =
     peer.appScore = stats.appScore
     peer.behaviourPenalty = stats.behaviourPenalty
 
+    # Check if the score is below the threshold and disconnect the peer if necessary
+    g.disconnectIfBadScorePeer(peer, stats.score)
+
   peer.iHaveBudget = IHavePeerBudget
+  peer.pingBudget = PingsPeerBudget
 
 method onPubSubPeerEvent*(p: GossipSub, peer: PubSubPeer, event: PubSubPeerEvent) {.gcsafe.} =
   case event.kind
@@ -187,11 +198,11 @@ 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
@@ -200,8 +211,8 @@ 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)
@@ -210,6 +221,8 @@ 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,
@@ -240,7 +253,7 @@ 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"
 
@@ -254,7 +267,7 @@ 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
 
@@ -262,18 +275,35 @@ 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:
     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
 
+  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_prune.inc(labelValues = ["generic"])
+
+    trace "sending control message", msg = shortLog(respControl), peer
+    g.send(
+      peer,
+      RPCMsg(control: some(respControl)), true)
+
+  if messages.len > 0:
     for smsg in messages:
       for topic in smsg.topicIds:
         if g.knownTopics.contains(topic):
@@ -281,18 +311,11 @@ proc handleControl(g: GossipSub, peer: PubSubPeer, control: ControlMessage) =
         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"])
-
-    trace "sending control message", msg = shortLog(respControl), peer
+    # iwant replies have lower priority
+    trace "sending iwant reply messages", peer
     g.send(
       peer,
-      RPCMsg(control: some(respControl), messages: messages))
+      RPCMsg(messages: messages), false)
 
 proc validateAndRelay(g: GossipSub,
                       msg: Message,
@@ -304,12 +327,13 @@ proc validateAndRelay(g: GossipSub,
     var seenPeers: HashSet[PubSubPeer]
     discard g.validationSeen.pop(msgIdSalted, 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",
@@ -331,14 +355,34 @@ proc validateAndRelay(g: GossipSub,
       g.floodsub.withValue(t, peers): toSendPeers.incl(peers[])
       g.mesh.withValue(t, peers): toSendPeers.incl(peers[])
 
+      # add direct peers
+      toSendPeers.incl(g.subscribedDirectPeers.getOrDefault(t))
+
     # Don't send it to source peer, or peers that
     # sent it during validation
     toSendPeers.excl(peer)
     toSendPeers.excl(seenPeers)
 
+    # IDontWant is only worth it if the message is substantially
+    # bigger than the messageId
+    if msg.data.len > msgId.len * 10:
+      g.broadcast(toSendPeers, RPCMsg(control: some(ControlMessage(
+          idontwant: @[ControlIWant(messageIds: @[msgId])]
+        ))))
+
+    for peer in toSendPeers:
+      for heDontWant in peer.heDontWants:
+        if msgId in heDontWant:
+          seenPeers.incl(peer)
+          libp2p_gossipsub_idontwant_saved_messages.inc
+          libp2p_gossipsub_saved_bytes.inc(msg.data.len.int64, labelValues = ["idontwant"])
+          break
+    toSendPeers.excl(seenPeers)
+
+
     # 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]))
+    g.broadcast(toSendPeers, RPCMsg(messages: @[msg]), false)
     trace "forwarded message to peers", peers = toSendPeers.len, msgId, peer
     for topic in msg.topicIds:
       if topic notin g.topics: continue
@@ -352,9 +396,65 @@ proc validateAndRelay(g: GossipSub,
   except CatchableError as exc:
     info "validateAndRelay failed", msg=exc.msg
 
+proc dataAndTopicsIdSize(msgs: seq[Message]): int =
+  msgs.mapIt(it.data.len + it.topicIds.mapIt(it.len).foldl(a + b, 0)).foldl(a + b, 0)
+
+proc rateLimit*(g: GossipSub, peer: PubSubPeer, rpcMsgOpt: Opt[RPCMsg], msgSize: int) {.async.} =
+  # In this way we count even ignored fields by protobuf
+
+  var rmsg = rpcMsgOpt.valueOr:
+    peer.overheadRateLimitOpt.withValue(overheadRateLimit):
+      if not overheadRateLimit.tryConsume(msgSize):
+        libp2p_gossipsub_peers_rate_limit_hits.inc(labelValues = [peer.getAgent()]) # let's just measure at the beginning for test purposes.
+        debug "Peer sent a msg that couldn't be decoded and it's above rate limit.", peer, uselessAppBytesNum = msgSize
+        if g.parameters.disconnectPeerAboveRateLimit:
+          await g.disconnectPeer(peer)
+          raise newException(PeerRateLimitError, "Peer disconnected because it's above rate limit.")
+
+    raise newException(CatchableError, "Peer msg couldn't be decoded")
+
+  let usefulMsgBytesNum =
+    if g.verifySignature:
+      byteSize(rmsg.messages)
+    else:
+      dataAndTopicsIdSize(rmsg.messages)
+
+  var uselessAppBytesNum = msgSize - usefulMsgBytesNum
+  rmsg.control.withValue(control):
+    uselessAppBytesNum -= (byteSize(control.ihave) + byteSize(control.iwant))
+
+  peer.overheadRateLimitOpt.withValue(overheadRateLimit):
+    if not overheadRateLimit.tryConsume(uselessAppBytesNum):
+      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, msgSize, uselessAppBytesNum, rmsg
+      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,
-                  rpcMsg: RPCMsg) {.async.} =
+                  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, Opt.none(RPCMsg), msgSize)
+    return
+
+  when defined(libp2p_expensive_metrics):
+    for m in rpcMsg.messages:
+      for t in m.topicIds:
+        libp2p_pubsub_received_messages.inc(labelValues = [$peer.peerId, t])
+
+  trace "decoded msg from peer", peer, msg = rpcMsg.shortLog
+  await rateLimit(g, peer, Opt.some(rpcMsg), msgSize)
+
+  # trigger hooks
+  peer.recvObservers(rpcMsg)
+
+  if rpcMsg.ping.len in 1..<64 and peer.pingBudget > 0:
+    g.send(peer, RPCMsg(pong: rpcMsg.ping), true)
+    peer.pingBudget.dec
   for i in 0..<min(g.topicsHigh, rpcMsg.subscriptions.len):
     template sub: untyped = rpcMsg.subscriptions[i]
     g.handleSubscribe(peer, sub.topic, sub.subscribe)
@@ -412,14 +512,14 @@ method rpcHandler*(g: GossipSub,
       # 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
@@ -491,32 +591,38 @@ method publish*(g: GossipSub,
 
   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
-    #
+  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
+    var maxPeersToFlodOpt: Opt[int64]
+    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)
+      maxPeersToFlodOpt = Opt.some(max(g.parameters.heartbeatInterval.milliseconds div msToTransmit, g.parameters.dLow))
+
+    for peer in g.gossipsub.getOrDefault(topic):
+      maxPeersToFlodOpt.withValue(maxPeersToFlod):
+        if peers.len >= maxPeersToFlod: break
+      if peer.score >= g.parameters.publishThreshold:
+        trace "publish: including flood/high score peer", peer
+        peers.incl(peer)
+
+  if peers.len < g.parameters.dLow:
+    # not subscribed, or bad mesh, send to fanout peers
     var fanoutPeers = g.fanout.getOrDefault(topic).toSeq()
-    if fanoutPeers.len == 0:
+    if fanoutPeers.len < g.parameters.dLow:
       g.replenishFanout(topic)
       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)
@@ -534,7 +640,6 @@ method publish*(g: GossipSub,
     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
     libp2p_gossipsub_failed_publish.inc()
     return 0
 
@@ -562,7 +667,7 @@ method publish*(g: GossipSub,
 
   g.mcache.put(msgId, msg)
 
-  g.broadcast(peers, RPCMsg(messages: @[msg]))
+  g.broadcast(peers, RPCMsg(messages: @[msg]), true)
 
   if g.knownTopics.contains(topic):
     libp2p_pubsub_messages_published.inc(peers.len.int64, labelValues = [topic])
@@ -570,15 +675,16 @@ method publish*(g: GossipSub,
     libp2p_pubsub_messages_published.inc(peers.len.int64, labelValues = ["generic"])
 
   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:
@@ -622,7 +728,7 @@ method stop*(g: GossipSub) {.async.} =
   g.heartbeatFut = nil
 
 method initPubSub*(g: GossipSub)
-  {.raises: [Defect, InitializationError].} =
+  {.raises: [InitializationError].} =
   procCall FloodSub(g).initPubSub()
 
   if not g.parameters.explicit:
@@ -637,3 +743,14 @@ method initPubSub*(g: GossipSub)
 
   # init gossip stuff
   g.mcache = MCache.init(g.parameters.historyGossip, g.parameters.historyLength)
+
+method getOrCreatePeer*(
+    g: GossipSub,
+    peerId: PeerId,
+    protos: seq[string]): PubSubPeer =
+
+  let peer = procCall PubSub(g).getOrCreatePeer(peerId, protos)
+  g.parameters.overheadRateLimit.withValue(overheadRateLimit):
+    peer.overheadRateLimitOpt = Opt.some(TokenBucket.new(overheadRateLimit.bytes, overheadRateLimit.interval))
+  peer.rpcmessagequeue.maxDurationInNonPriorityQueue = g.parameters.maxDurationInNonPriorityQueue
+  return peer

libp2p/protocols/pubsub/gossipsub/behavior.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/[tables, sequtils, sets, algorithm, deques]
 import chronos, chronicles, metrics
@@ -33,7 +30,7 @@ declareGauge(libp2p_gossipsub_healthy_peers_topics, "number of topics in mesh wi
 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].} =
+proc grafted*(g: GossipSub, p: PubSubPeer, topic: string) {.raises: [].} =
   g.withPeerStats(p.peerId) do (stats: var PeerStats):
     var info = stats.topicInfos.getOrDefault(topic)
     info.graftTime = Moment.now()
@@ -49,12 +46,10 @@ proc pruned*(g: GossipSub,
              p: PubSubPeer,
              topic: string,
              setBackoff: bool = true,
-             backoff = none(Duration)) {.raises: [Defect].} =
+             backoff = none(Duration)) {.raises: [].} =
   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
@@ -75,7 +70,7 @@ proc pruned*(g: GossipSub,
 
       trace "pruned", peer=p, topic
 
-proc handleBackingOff*(t: var BackoffTable, topic: string) {.raises: [Defect].} =
+proc handleBackingOff*(t: var BackoffTable, topic: string) {.raises: [].} =
   let now = Moment.now()
   var expired = toSeq(t.getOrDefault(topic).pairs())
   expired.keepIf do (pair: tuple[peer: PeerId, expire: Moment]) -> bool:
@@ -84,7 +79,7 @@ proc handleBackingOff*(t: var BackoffTable, topic: string) {.raises: [Defect].}
     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] {.raises: [].} =
   if not g.parameters.enablePX:
     return @[]
   var peers = g.gossipsub.getOrDefault(topic, initHashSet[PubSubPeer]()).toSeq()
@@ -111,10 +106,11 @@ proc handleGraft*(g: GossipSub,
     let topic = graft.topicId
     trace "peer grafted topic", 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(
@@ -194,27 +190,22 @@ proc handleGraft*(g: GossipSub,
 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]) {.raises: [].} =
   for prune in prunes:
     let topic = prune.topicId
 
@@ -248,39 +239,42 @@ proc handlePrune*(g: GossipSub, peer: PubSubPeer, prunes: seq[ControlPrune]) {.r
 
 proc handleIHave*(g: GossipSub,
                  peer: PubSubPeer,
-                 ihaves: seq[ControlIHave]): ControlIWant {.raises: [Defect].} =
+                 ihaves: seq[ControlIHave]): ControlIWant {.raises: [].} =
   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:
+    for ihave in ihaves:
       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 ihave.topicId in g.topics:
+        for msgId in ihave.messageIds:
           if not g.hasSeen(msgId):
-            if peer.iHaveBudget > 0:
+            if peer.iHaveBudget <= 0:
+              break
+            elif msgId notin res.messageIds:
               res.messageIds.add(msgId)
               dec peer.iHaveBudget
               trace "requested message via ihave", messageID=msgId
-            else:
-              break
     # 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)
     return res
 
+proc handleIDontWant*(g: GossipSub,
+                      peer: PubSubPeer,
+                      iDontWants: seq[ControlIWant]) =
+  for dontWant in iDontWants:
+    for messageId in dontWant.messageIds:
+      if peer.heDontWants[^1].len > 1000: break
+      if messageId.len > 100: continue
+      peer.heDontWants[^1].incl(messageId)
+
 proc handleIWant*(g: GossipSub,
                  peer: PubSubPeer,
-                 iwants: seq[ControlIWant]): seq[Message] {.raises: [Defect].} =
+                 iwants: seq[ControlIWant]): seq[Message] {.raises: [].} =
   var
     messages: seq[Message]
     invalidRequests = 0
@@ -299,15 +293,14 @@ proc handleIWant*(g: GossipSub,
             libp2p_gossipsub_received_iwants.inc(1, labelValues=["skipped"])
             return messages
           continue
-        let msg = g.mcache.get(mid)
-        if msg.isSome:
-          libp2p_gossipsub_received_iwants.inc(1, labelValues=["correct"])
-          messages.add(msg.get())
-        else:
+        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) {.raises: [].} =
   libp2p_gossipsub_low_peers_topics.set(metrics.lowPeersTopics)
   libp2p_gossipsub_no_peers_topics.set(metrics.noPeersTopics)
   libp2p_gossipsub_under_dout_topics.set(metrics.underDoutTopics)
@@ -316,7 +309,7 @@ proc commitMetrics(metrics: var MeshMetrics) {.raises: [Defect].} =
   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) {.raises: [].} =
   logScope:
     topic
     mesh = g.mesh.peers(topic)
@@ -348,7 +341,7 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
             # avoid negative score peers
             it.score >= 0.0 and
             it notin currentMesh[] 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:
@@ -388,7 +381,7 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
             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:
@@ -490,7 +483,7 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
               # avoid negative score peers
               it.score >= median.score and
               it notin currentMesh[] 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:
@@ -546,7 +539,7 @@ proc rebalanceMesh*(g: GossipSub, topic: string, metrics: ptr MeshMetrics = nil)
         backoff: g.parameters.pruneBackoff.seconds.uint64)])))
     g.broadcast(prunes, prune)
 
-proc dropFanoutPeers*(g: GossipSub) {.raises: [Defect].} =
+proc dropFanoutPeers*(g: GossipSub) {.raises: [].} =
   # drop peers that we haven't published to in
   # GossipSubFanoutTTL seconds
   let now = Moment.now()
@@ -559,13 +552,13 @@ 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) {.raises: [].} =
   ## get fanout peers for a 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
@@ -575,7 +568,7 @@ proc replenishFanout*(g: GossipSub, topic: string) {.raises: [Defect].} =
 
   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] {.raises: [].} =
   ## gossip iHave messages to peers
   ##
 
@@ -638,7 +631,7 @@ proc getGossipPeers*(g: GossipSub): Table[PubSubPeer, ControlMessage] {.raises:
 
   return control
 
-proc onHeartbeat(g: GossipSub) {.raises: [Defect].} =
+proc onHeartbeat(g: GossipSub) {.raises: [].} =
     # reset IWANT budget
     # reset IHAVE cap
     block:
@@ -646,7 +639,11 @@ proc onHeartbeat(g: GossipSub) {.raises: [Defect].} =
         peer.sentIHaves.addFirst(default(HashSet[MessageId]))
         if peer.sentIHaves.len > g.parameters.historyLength:
           discard peer.sentIHaves.popLast()
+        peer.heDontWants.addFirst(default(HashSet[MessageId]))
+        if peer.heDontWants.len > g.parameters.historyLength:
+          discard peer.heDontWants.popLast()
         peer.iHaveBudget = IHavePeerBudget
+        peer.pingBudget = PingsPeerBudget
 
     var meshMetrics = MeshMetrics()
 
@@ -698,7 +695,7 @@ proc onHeartbeat(g: GossipSub) {.raises: [Defect].} =
 
     g.mcache.shift() # shift the cache
 
-# {.pop.} # raises [Defect]
+# {.pop.} # raises []
 
 proc heartbeat*(g: GossipSub) {.async.} =
   heartbeat "GossipSub", g.parameters.heartbeatInterval:

libp2p/protocols/pubsub/gossipsub/scoring.nim

@@ -7,16 +7,16 @@
 # 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 ../rpc/messages
 import "../../.."/[peerid, multiaddress, switch, utils/heartbeat]
+import ../pubsub
 
 logScope:
   topics = "libp2p gossipsub"
@@ -30,6 +30,7 @@ declareGauge(libp2p_gossipsub_peers_score_invalidMessageDeliveries, "Detailed go
 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(
@@ -55,7 +56,7 @@ proc init*(_: type[TopicParams]): TopicParams =
 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:
@@ -74,39 +75,32 @@ func `/`(a, b: Duration): float64 =
 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
+    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])
-
+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
@@ -176,14 +170,7 @@ proc updateScores*(g: GossipSub) = # avoid async
         score += topicScore * topicParams.topicWeight
 
       # 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_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])
@@ -220,14 +207,7 @@ proc updateScores*(g: GossipSub) = # avoid async
     score += colocationFactor * 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])
@@ -247,11 +227,7 @@ proc updateScores*(g: GossipSub) = # avoid async
 
     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(g.disconnectPeer(peer))
-
+    g.disconnectIfBadScorePeer(peer, stats.score)
     libp2p_gossipsub_peers_scores.inc(peer.score, labelValues = [agent])
 
   for peer in evicting:
@@ -264,8 +240,18 @@ 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:
+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.")
+
+
+  for tt in msg.topicIds:
     let t = tt
     if t notin g.topics:
       continue

libp2p/protocols/pubsub/gossipsub/types.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 chronos
 import std/[options, tables, sets]
@@ -48,6 +45,7 @@ const
 
 const
   BackoffSlackTime* = 2 # seconds
+  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
@@ -144,6 +142,15 @@ 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
+
+    # The maximum duration a message can stay in the non-priority queue. If it exceeds this duration, it will be discarded
+    # as soon as it is dequeued, instead of being sent to the remote peer. The default value is none, i.e., no maximum duration.
+    maxDurationInNonPriorityQueue*: Opt[Duration]
+
   BackoffTable* = Table[string, Table[PeerId, Moment]]
   ValidationSeenTable* = Table[MessageId, HashSet[PubSubPeer]]
 
@@ -152,13 +159,13 @@ type
     proc(peer: PeerId,
     tag: string, # For gossipsub, the topic
     peers: seq[RoutingRecordsPair])
-    {.gcsafe, raises: [Defect].}
+    {.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
+    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
     gossip*: Table[string, seq[ControlIHave]]  # pending gossip

libp2p/protocols/pubsub/mcache.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/[sets, tables, options]
 import rpc/[messages]

libp2p/protocols/pubsub/peertable.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/[tables, sets, sequtils]
 import ./pubsubpeer, ../../peerid

libp2p/protocols/pubsub/pubsub.nim

@@ -13,13 +13,11 @@
 ## `publish<#publish.e%2CPubSub%2Cstring%2Cseq%5Bbyte%5D>`_ something on it,
 ## and eventually `unsubscribe<#unsubscribe%2CPubSub%2Cstring%2CTopicHandler>`_ from it.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[tables, sequtils, sets, strutils]
 import chronos, chronicles, metrics
+import chronos/ratelimit
 import ./errors as pubsub_errors,
        ./pubsubpeer,
        ./rpc/[message, messages, protobuf],
@@ -86,18 +84,18 @@ type
   InitializationError* = object of LPError
 
   TopicHandler* {.public.} = proc(topic: string,
-                       data: seq[byte]): Future[void] {.gcsafe, raises: [Defect].}
+                       data: seq[byte]): Future[void] {.gcsafe, raises: [].}
 
   ValidatorHandler* {.public.} = proc(topic: string,
-                           message: Message): Future[ValidationResult] {.gcsafe, raises: [Defect].}
+                           message: Message): Future[ValidationResult] {.gcsafe, raises: [].}
 
   TopicPair* = tuple[topic: string, handler: TopicHandler]
 
   MsgIdProvider* {.public.} =
-    proc(m: Message): Result[MessageId, ValidationResult] {.noSideEffect, raises: [Defect], gcsafe.}
+    proc(m: Message): Result[MessageId, ValidationResult] {.noSideEffect, raises: [], gcsafe.}
 
   SubscriptionValidator* {.public.} =
-    proc(topic: string): bool {.raises: [Defect], gcsafe.}
+    proc(topic: string): bool {.raises: [], gcsafe.}
     ## Every time a peer send us a subscription (even to an unknown topic),
     ## we have to store it, which may be an attack vector.
     ## This callback can be used to reject topic we're not interested in
@@ -140,17 +138,18 @@ method unsubscribePeer*(p: PubSub, peerId: PeerId) {.base, gcsafe.} =
 
   libp2p_pubsub_peers.set(p.peers.len.int64)
 
-proc send*(p: PubSub, peer: PubSubPeer, msg: RPCMsg) {.raises: [Defect].} =
+proc send*(p: PubSub, peer: PubSubPeer, msg: RPCMsg, isHighPriority: bool = false) {.raises: [].} =
   ## Attempt to send `msg` to remote peer
   ##
 
   trace "sending pubsub message to peer", peer, msg = shortLog(msg)
-  peer.send(msg, p.anonymize)
+  asyncSpawn peer.send(msg, p.anonymize, isHighPriority)
 
 proc broadcast*(
   p: PubSub,
   sendPeers: auto, # Iteratble[PubSubPeer]
-  msg: RPCMsg) {.raises: [Defect].} =
+  msg: RPCMsg,
+  isHighPriority: bool = false) {.raises: [].} =
   ## Attempt to send `msg` to the given peers
 
   let npeers = sendPeers.len.int64
@@ -173,10 +172,9 @@ proc broadcast*(
       else:
         libp2p_pubsub_broadcast_messages.inc(npeers, labelValues = ["generic"])
 
-  if msg.control.isSome():
-    libp2p_pubsub_broadcast_iwant.inc(npeers * msg.control.get().iwant.len.int64)
+  msg.control.withValue(control):
+    libp2p_pubsub_broadcast_iwant.inc(npeers * control.iwant.len.int64)
 
-    let control = msg.control.get()
     for ihave in control.ihave:
       if p.knownTopics.contains(ihave.topicId):
         libp2p_pubsub_broadcast_ihave.inc(npeers, labelValues = [ihave.topicId])
@@ -198,12 +196,12 @@ proc broadcast*(
 
   if anyIt(sendPeers, it.hasObservers):
     for peer in sendPeers:
-      p.send(peer, msg)
+      p.send(peer, msg, isHighPriority)
   else:
     # Fast path that only encodes message once
     let encoded = encodeRpcMsg(msg, p.anonymize)
     for peer in sendPeers:
-      asyncSpawn peer.sendEncoded(encoded)
+      asyncSpawn peer.sendEncoded(encoded, isHighPriority)
 
 proc sendSubs*(p: PubSub,
                peer: PubSubPeer,
@@ -247,9 +245,8 @@ proc updateMetrics*(p: PubSub, rpcMsg: RPCMsg) =
       else:
         libp2p_pubsub_received_messages.inc(labelValues = ["generic"])
 
-  if rpcMsg.control.isSome():
-    libp2p_pubsub_received_iwant.inc(rpcMsg.control.get().iwant.len.int64)
-    template control: untyped = rpcMsg.control.unsafeGet()
+  rpcMsg.control.withValue(control):
+    libp2p_pubsub_received_iwant.inc(control.iwant.len.int64)
     for ihave in control.ihave:
       if p.knownTopics.contains(ihave.topicId):
         libp2p_pubsub_received_ihave.inc(labelValues = [ihave.topicId])
@@ -268,7 +265,7 @@ proc updateMetrics*(p: PubSub, rpcMsg: RPCMsg) =
 
 method rpcHandler*(p: PubSub,
                    peer: PubSubPeer,
-                   rpcMsg: RPCMsg): Future[void] {.base, async.} =
+                   data: seq[byte]): Future[void] {.base, async.} =
   ## Handler that must be overridden by concrete implementation
   raiseAssert "Unimplemented"
 
@@ -283,10 +280,11 @@ method onPubSubPeerEvent*(p: PubSub, peer: PubSubPeer, event: PubSubPeerEvent) {
   of PubSubPeerEventKind.Disconnected:
     discard
 
-proc getOrCreatePeer*(
+method getOrCreatePeer*(
     p: PubSub,
     peerId: PeerId,
-    protos: seq[string]): PubSubPeer =
+    protos: seq[string]): PubSubPeer {.base, gcsafe.} =
+
   p.peers.withValue(peerId, peer):
     return peer[]
 
@@ -359,9 +357,9 @@ method handleConn*(p: PubSub,
   ##    that we're interested in
   ##
 
-  proc handler(peer: PubSubPeer, msg: RPCMsg): Future[void] =
+  proc handler(peer: PubSubPeer, data: seq[byte]): Future[void] =
     # call pubsub rpc handler
-    p.rpcHandler(peer, msg)
+    p.rpcHandler(peer, data)
 
   let peer = p.getOrCreatePeer(conn.peerId, @[proto])
 
@@ -491,7 +489,7 @@ method publish*(p: PubSub,
   return 0
 
 method initPubSub*(p: PubSub)
-  {.base, raises: [Defect, InitializationError].} =
+  {.base, raises: [InitializationError].} =
   ## perform pubsub initialization
   p.observers = new(seq[PubSubObserver])
   if p.msgIdProvider == nil:
@@ -559,7 +557,7 @@ proc init*[PubParams: object | bool](
   maxMessageSize: int = 1024 * 1024,
   rng: ref HmacDrbgContext = newRng(),
   parameters: PubParams = false): P
-  {.raises: [Defect, InitializationError], public.} =
+  {.raises: [InitializationError], public.} =
   let pubsub =
     when PubParams is bool:
       P(switch: switch,

libp2p/protocols/pubsub/pubsubpeer.nim

@@ -7,14 +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/[sequtils, strutils, tables, hashes, options, sets, deques]
 import stew/results
 import chronos, chronicles, nimcrypto/sha2, metrics
+import chronos/ratelimit
 import rpc/[messages, message, protobuf],
        ../../peerid,
        ../../peerinfo,
@@ -23,21 +21,28 @@ import rpc/[messages, message, protobuf],
        ../../protobuf/minprotobuf,
        ../../utility
 
-export peerid, connection
+export peerid, connection, deques
 
 logScope:
   topics = "libp2p pubsubpeer"
 
 when defined(libp2p_expensive_metrics):
   declareCounter(libp2p_pubsub_sent_messages, "number of messages sent", labels = ["id", "topic"])
-  declareCounter(libp2p_pubsub_received_messages, "number of messages received", labels = ["id", "topic"])
   declareCounter(libp2p_pubsub_skipped_received_messages, "number of received skipped messages", labels = ["id"])
   declareCounter(libp2p_pubsub_skipped_sent_messages, "number of sent skipped messages", labels = ["id"])
 
+  declareGauge(libp2p_gossipsub_priority_queue_size, "the number of messages in the priority queue", labels = ["id"])
+  declareGauge(libp2p_gossipsub_non_priority_queue_size, "the number of messages in the non-priority queue", labels = ["id"])
+
+  declareCounter(libp2p_gossipsub_non_priority_msgs_dropped, "the number of dropped messages in the non-priority queue", labels = ["id"])
+
+
 type
+  PeerRateLimitError* = object of CatchableError
+
   PubSubObserver* = ref object
-    onRecv*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [Defect].}
-    onSend*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [Defect].}
+    onRecv*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [].}
+    onSend*: proc(peer: PubSubPeer; msgs: var RPCMsg) {.gcsafe, raises: [].}
 
   PubSubPeerEventKind* {.pure.} = enum
     Connected
@@ -46,9 +51,23 @@ type
   PubSubPeerEvent* = object
     kind*: PubSubPeerEventKind
 
-  GetConn* = proc(): Future[Connection] {.gcsafe, raises: [Defect].}
-  DropConn* = proc(peer: PubSubPeer) {.gcsafe, raises: [Defect].} # have to pass peer as it's unknown during init
-  OnEvent* = proc(peer: PubSubPeer, event: PubSubPeerEvent) {.gcsafe, raises: [Defect].}
+  GetConn* = proc(): Future[Connection] {.gcsafe, raises: [].}
+  DropConn* = proc(peer: PubSubPeer) {.gcsafe, raises: [].} # have to pass peer as it's unknown during init
+  OnEvent* = proc(peer: PubSubPeer, event: PubSubPeerEvent) {.gcsafe, raises: [].}
+
+  QueuedMessage* = object
+    msg*: seq[byte]
+    addedAt*: Moment
+
+  RpcMessageQueue* = ref object
+    # Tracks async tasks for sending high-priority peer-published messages.
+    sendPriorityQueue: Deque[Future[void]]
+    # Queue for lower-priority messages, like "IWANT" replies and relay messages.
+    nonPriorityQueue: AsyncQueue[QueuedMessage]
+    # Task for processing non-priority message queue.
+    sendNonPriorityTask: Future[void]
+    # The max duration a message to be relayed can wait to be sent before it is dropped. The default is 500ms.
+    maxDurationInNonPriorityQueue*: Opt[Duration]
 
   PubSubPeer* = ref object of RootObj
     getConn*: GetConn                   # callback to establish a new send connection
@@ -63,13 +82,18 @@ type
 
     score*: float64
     sentIHaves*: Deque[HashSet[MessageId]]
+    heDontWants*: Deque[HashSet[MessageId]]
     iHaveBudget*: int
+    pingBudget*: int
     maxMessageSize: int
     appScore*: float64 # application specific score
     behaviourPenalty*: float64 # the eventual penalty score
+    overheadRateLimitOpt*: Opt[TokenBucket]
 
-  RPCHandler* = proc(peer: PubSubPeer, msg: RPCMsg): Future[void]
-    {.gcsafe, raises: [Defect].}
+    rpcmessagequeue*: RpcMessageQueue
+
+  RPCHandler* = proc(peer: PubSubPeer, data: seq[byte]): Future[void]
+    {.gcsafe, raises: [].}
 
 when defined(libp2p_agents_metrics):
   func shortAgent*(p: PubSubPeer): string =
@@ -80,6 +104,16 @@ when defined(libp2p_agents_metrics):
       #so we have to read the parents short agent..
       p.sendConn.getWrapped().shortAgent
 
+proc getAgent*(peer: PubSubPeer): string =
+  return
+    when defined(libp2p_agents_metrics):
+      if peer.shortAgent.len > 0:
+        peer.shortAgent
+      else:
+        "unknown"
+    else:
+      "unknown"
+
 func hash*(p: PubSubPeer): Hash =
   p.peerId.hash
 
@@ -108,7 +142,7 @@ func outbound*(p: PubSubPeer): bool =
   else:
     false
 
-proc recvObservers(p: PubSubPeer, msg: var RPCMsg) =
+proc recvObservers*(p: PubSubPeer, msg: var RPCMsg) =
   # trigger hooks
   if not(isNil(p.observers)) and p.observers[].len > 0:
     for obs in p.observers[]:
@@ -135,28 +169,13 @@ proc handle*(p: PubSubPeer, conn: Connection) {.async.} =
           conn, peer = p, closed = conn.closed,
           data = data.shortLog
 
-        var rmsg = decodeRpcMsg(data)
+        await p.handler(p, data)
         data = newSeq[byte]() # Release memory
-
-        if rmsg.isErr():
-          notice "failed to decode msg from peer",
-            conn, peer = p, closed = conn.closed,
-            err = rmsg.error()
-          break
-
-        trace "decoded msg from peer",
-          conn, peer = p, closed = conn.closed,
-          msg = rmsg.get().shortLog
-        # trigger hooks
-        p.recvObservers(rmsg.get())
-
-        when defined(libp2p_expensive_metrics):
-          for m in rmsg.get().messages:
-            for t in m.topicIDs:
-              # metrics
-              libp2p_pubsub_received_messages.inc(labelValues = [$p.peerId, t])
-
-        await p.handler(p, rmsg.get())
+    except PeerRateLimitError as exc:
+      debug "Peer rate limit exceeded, exiting read while", conn, peer = p, error = exc.msg
+    except CatchableError as exc:
+      debug "Exception occurred in PubSubPeer.handle",
+        conn, peer = p, closed = conn.closed, exc = exc.msg
     finally:
       await conn.close()
   except CancelledError:
@@ -174,7 +193,7 @@ proc connectOnce(p: PubSubPeer): Future[void] {.async.} =
   try:
     if p.connectedFut.finished:
       p.connectedFut = newFuture[void]()
-    let newConn = await p.getConn()
+    let newConn = await p.getConn().wait(5.seconds)
     if newConn.isNil:
       raise (ref LPError)(msg: "Cannot establish send connection")
 
@@ -201,6 +220,9 @@ proc connectOnce(p: PubSubPeer): Future[void] {.async.} =
       await p.sendConn.close()
       p.sendConn = nil
 
+    if not p.connectedFut.finished:
+      p.connectedFut.complete()
+
     try:
       if p.onEvent != nil:
         p.onEvent(p, PubSubPeerEvent(kind: PubSubPeerEventKind.Disconnected))
@@ -233,27 +255,25 @@ proc hasSendConn*(p: PubSubPeer): bool =
 template sendMetrics(msg: RPCMsg): untyped =
   when defined(libp2p_expensive_metrics):
     for x in msg.messages:
-      for t in x.topicIDs:
+      for t in x.topicIds:
         # metrics
         libp2p_pubsub_sent_messages.inc(labelValues = [$p.peerId, t])
 
-proc sendEncoded*(p: PubSubPeer, msg: seq[byte]) {.raises: [Defect], async.} =
-  doAssert(not isNil(p), "pubsubpeer nil!")
-
-  if msg.len <= 0:
-    debug "empty message, skipping", p, msg = shortLog(msg)
-    return
-
-  if msg.len > p.maxMessageSize:
-    info "trying to send a too big for pubsub", maxSize=p.maxMessageSize, msgSize=msg.len
-    return
+proc clearSendPriorityQueue(p: PubSubPeer) =
+  while p.rpcmessagequeue.sendPriorityQueue.len > 0 and p.rpcmessagequeue.sendPriorityQueue[0].finished:
+    when defined(libp2p_expensive_metrics):
+      libp2p_gossipsub_priority_queue_size.dec(labelValues = [$p.peerId])
+    discard p.rpcmessagequeue.sendPriorityQueue.popFirst()
 
+proc sendMsg(p: PubSubPeer, msg: seq[byte]) {.async.} =
   if p.sendConn == nil:
-    discard await p.connectedFut.withTimeout(1.seconds)
+    # Wait for a send conn to be setup. `connectOnce` will
+    # complete this even if the sendConn setup failed
+    await p.connectedFut
 
   var conn = p.sendConn
   if conn == nil or conn.closed():
-    debug "No send connection, skipping message", p, msg = shortLog(msg)
+    debug "No send connection", p, msg = shortLog(msg)
     return
 
   trace "sending encoded msgs to peer", conn, encoded = shortLog(msg)
@@ -270,9 +290,66 @@ proc sendEncoded*(p: PubSubPeer, msg: seq[byte]) {.raises: [Defect], async.} =
 
     await conn.close() # This will clean up the send connection
 
-proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool) {.raises: [Defect].} =
-  trace "sending msg to peer", peer = p, rpcMsg = shortLog(msg)
+proc sendEncoded*(p: PubSubPeer, msg: seq[byte], isHighPriority: bool = false) {.async.} =
+  doAssert(not isNil(p), "pubsubpeer nil!")
 
+  if msg.len <= 0:
+    debug "empty message, skipping", p, msg = shortLog(msg)
+    return
+
+  if msg.len > p.maxMessageSize:
+    info "trying to send a msg too big for pubsub", maxSize=p.maxMessageSize, msgSize=msg.len
+    return
+
+  if isHighPriority:
+    p.clearSendPriorityQueue()
+    let f = p.sendMsg(msg)
+    if not f.finished:
+      p.rpcmessagequeue.sendPriorityQueue.addLast(f)
+      when defined(libp2p_expensive_metrics):
+        libp2p_gossipsub_priority_queue_size.inc(labelValues = [$p.peerId])
+  else:
+    await p.rpcmessagequeue.nonPriorityQueue.addLast(QueuedMessage(msg: msg, addedAt: Moment.now()))
+    when defined(libp2p_expensive_metrics):
+      libp2p_gossipsub_non_priority_queue_size.inc(labelValues = [$p.peerId])
+  trace "message queued", p, msg = shortLog(msg)
+
+iterator splitRPCMsg(peer: PubSubPeer, rpcMsg: RPCMsg, maxSize: int, anonymize: bool): seq[byte] =
+  ## This iterator takes an `RPCMsg` and sequentially repackages its Messages into new `RPCMsg` instances.
+  ## Each new `RPCMsg` accumulates Messages until reaching the specified `maxSize`. If a single Message
+  ## exceeds the `maxSize` when trying to fit into an empty `RPCMsg`, the latter is skipped as too large to send.
+  ## Every constructed `RPCMsg` is then encoded, optionally anonymized, and yielded as a sequence of bytes.
+
+  var currentRPCMsg = rpcMsg
+  currentRPCMsg.messages = newSeq[Message]()
+
+  var currentSize = byteSize(currentRPCMsg)
+
+  for msg in rpcMsg.messages:
+    let msgSize = byteSize(msg)
+
+    # Check if adding the next message will exceed maxSize
+    if float(currentSize + msgSize) * 1.1 > float(maxSize): # Guessing 10% protobuf overhead
+      if currentRPCMsg.messages.len == 0:
+        trace "message too big to sent", peer, rpcMsg = shortLog(currentRPCMsg)
+        continue # Skip this message
+
+      trace "sending msg to peer", peer, rpcMsg = shortLog(currentRPCMsg)
+      yield encodeRpcMsg(currentRPCMsg, anonymize)
+      currentRPCMsg = RPCMsg()
+      currentSize = 0
+
+    currentRPCMsg.messages.add(msg)
+    currentSize += msgSize
+
+  # Check if there is a non-empty currentRPCMsg left to be added
+  if currentSize > 0 and currentRPCMsg.messages.len > 0:
+    trace "sending msg to peer", peer, rpcMsg = shortLog(currentRPCMsg)
+    yield encodeRpcMsg(currentRPCMsg, anonymize)
+  else:
+    trace "message too big to sent", peer, rpcMsg = shortLog(currentRPCMsg)
+
+proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool, isHighPriority: bool = false) {.async.} =
   # When sending messages, we take care to re-encode them with the right
   # anonymization flag to ensure that we're not penalized for sending invalid
   # or malicious data on the wire - in particular, re-encoding protects against
@@ -290,7 +367,13 @@ proc send*(p: PubSubPeer, msg: RPCMsg, anonymize: bool) {.raises: [Defect].} =
     sendMetrics(msg)
     encodeRpcMsg(msg, anonymize)
 
-  asyncSpawn p.sendEncoded(encoded)
+  if encoded.len > p.maxMessageSize and msg.messages.len > 1:
+    for encodedSplitMsg in splitRPCMsg(p, msg, p.maxMessageSize, anonymize):
+      await p.sendEncoded(encodedSplitMsg, isHighPriority)
+  else:
+    # If the message size is within limits, send it as is
+    trace "sending msg to peer", peer = p, rpcMsg = shortLog(msg)
+    await p.sendEncoded(encoded, isHighPriority)
 
 proc canAskIWant*(p: PubSubPeer, msgId: MessageId): bool =
   for sentIHave in p.sentIHaves.mitems():
@@ -299,13 +382,58 @@ proc canAskIWant*(p: PubSubPeer, msgId: MessageId): bool =
       return true
   return false
 
+proc sendNonPriorityTask(p: PubSubPeer) {.async.} =
+  while true:
+     # we send non-priority messages only if there are no pending priority messages
+     let queuedMsg = await p.rpcmessagequeue.nonPriorityQueue.popFirst()
+     while p.rpcmessagequeue.sendPriorityQueue.len > 0:
+       p.clearSendPriorityQueue()
+       # this minimizes the number of times we have to wait for something (each wait = performance cost)
+       # we will never wait for a finished future and by waiting for the last one, all that come before it are guaranteed
+       # to be finished already (since sends are processed in order).
+       if p.rpcmessagequeue.sendPriorityQueue.len > 0:
+        await p.rpcmessagequeue.sendPriorityQueue[^1]
+     when defined(libp2p_expensive_metrics):
+       libp2p_gossipsub_non_priority_queue_size.dec(labelValues = [$p.peerId])
+     p.rpcmessagequeue.maxDurationInNonPriorityQueue.withValue(maxDurationInNonPriorityQueue):
+       if Moment.now() - queuedMsg.addedAt >= maxDurationInNonPriorityQueue:
+         when defined(libp2p_expensive_metrics):
+          libp2p_gossipsub_non_priority_msgs_dropped.inc(labelValues = [$p.peerId])
+         continue
+     await p.sendMsg(queuedMsg.msg)
+
+proc startSendNonPriorityTask(p: PubSubPeer) =
+  debug "starting sendNonPriorityTask", p
+  if p.rpcmessagequeue.sendNonPriorityTask.isNil:
+    p.rpcmessagequeue.sendNonPriorityTask = p.sendNonPriorityTask()
+
+proc stopSendNonPriorityTask*(p: PubSubPeer) =
+  if not p.rpcmessagequeue.sendNonPriorityTask.isNil:
+    debug "stopping sendNonPriorityTask", p
+    p.rpcmessagequeue.sendNonPriorityTask.cancel()
+    p.rpcmessagequeue.sendNonPriorityTask = nil
+    p.rpcmessagequeue.sendPriorityQueue.clear()
+    p.rpcmessagequeue.nonPriorityQueue.clear()
+    when defined(libp2p_expensive_metrics):
+      libp2p_gossipsub_priority_queue_size.set(labelValues = [$p.peerId], value = 0)
+      libp2p_gossipsub_non_priority_queue_size.set(labelValues = [$p.peerId], value = 0)
+
+proc new(T: typedesc[RpcMessageQueue], maxDurationInNonPriorityQueue = Opt.none(Duration)): T =
+  return T(
+    sendPriorityQueue: initDeque[Future[void]](),
+    nonPriorityQueue: newAsyncQueue[QueuedMessage](),
+    maxDurationInNonPriorityQueue: maxDurationInNonPriorityQueue,
+  )
+
 proc new*(
   T: typedesc[PubSubPeer],
   peerId: PeerId,
   getConn: GetConn,
   onEvent: OnEvent,
   codec: string,
-  maxMessageSize: int): T =
+  maxMessageSize: int,
+  overheadRateLimitOpt: Opt[TokenBucket] = Opt.none(TokenBucket),
+  maxDurationInNonPriorityQueue = Opt.none(Duration)): T =
 
   result = T(
     getConn: getConn,
@@ -313,6 +441,10 @@ proc new*(
     codec: codec,
     peerId: peerId,
     connectedFut: newFuture[void](),
-    maxMessageSize: maxMessageSize
+    maxMessageSize: maxMessageSize,
+    overheadRateLimitOpt: overheadRateLimitOpt,
+    rpcmessagequeue: RpcMessageQueue.new(maxDurationInNonPriorityQueue),
   )
   result.sentIHaves.addFirst(default(HashSet[MessageId]))
+  result.heDontWants.addFirst(default(HashSet[MessageId]))
+  result.startSendNonPriorityTask()

libp2p/protocols/pubsub/rpc/message.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 chronicles, metrics, stew/[byteutils, endians2]
 import ./messages,
@@ -65,22 +62,21 @@ proc init*(
     topic: string,
     seqno: Option[uint64],
     sign: bool = true): Message
-    {.gcsafe, raises: [Defect, LPError].} =
+    {.gcsafe, raises: [LPError].} =
   var msg = Message(data: data, topicIDs: @[topic])
 
   # order matters, we want to include seqno in the signature
-  if seqno.isSome:
-    msg.seqno = @(seqno.get().toBytesBE())
+  seqno.withValue(seqn):
+    msg.seqno = @(seqn.toBytesBE())
 
-  if peer.isSome:
-    let peer = peer.get()
+  peer.withValue(peer):
     msg.fromPeer = peer.peerId
     if sign:
       msg.signature = sign(msg, peer.privateKey).expect("Couldn't sign message!")
       msg.key = peer.privateKey.getPublicKey().expect("Invalid private key!")
         .getBytes().expect("Couldn't get public key bytes!")
-  elif sign:
-    raise (ref LPError)(msg: "Cannot sign message without peer info")
+  else:
+    if sign: raise (ref LPError)(msg: "Cannot sign message without peer info")
 
   msg
 
@@ -90,10 +86,10 @@ proc init*(
     data: seq[byte],
     topic: string,
     seqno: Option[uint64]): Message
-    {.gcsafe, raises: [Defect, LPError].} =
+    {.gcsafe, raises: [LPError].} =
   var msg = Message(data: data, topicIDs: @[topic])
   msg.fromPeer = peerId
 
-  if seqno.isSome:
-    msg.seqno = @(seqno.get().toBytesBE())
+  seqno.withValue(seqn):
+    msg.seqno = @(seqn.toBytesBE())
   msg

libp2p/protocols/pubsub/rpc/messages.nim

@@ -7,12 +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 options, sequtils
+import options, sequtils, sugar
 import "../../.."/[
         peerid,
         routing_record,
@@ -21,6 +18,14 @@ import "../../.."/[
 
 export options
 
+proc expectedFields[T](t: typedesc[T], existingFieldNames: seq[string]) {.raises: [CatchableError].} =
+  var fieldNames: seq[string]
+  for name, _ in fieldPairs(T()):
+    fieldNames &= name
+  if fieldNames != existingFieldNames:
+    fieldNames.keepIf(proc(it: string): bool = it notin existingFieldNames)
+    raise newException(CatchableError, $T & " fields changed, please search for and revise all relevant procs. New fields: " & $fieldNames)
+
 type
     PeerInfoMsg* = object
       peerId*: PeerId
@@ -45,6 +50,7 @@ type
       iwant*: seq[ControlIWant]
       graft*: seq[ControlGraft]
       prune*: seq[ControlPrune]
+      idontwant*: seq[ControlIWant]
 
     ControlIHave* = object
       topicId*: string
@@ -65,6 +71,8 @@ type
       subscriptions*: seq[SubOpts]
       messages*: seq[Message]
       control*: Option[ControlMessage]
+      ping*: seq[byte]
+      pong*: seq[byte]
 
 func withSubs*(
     T: type RPCMsg, topics: openArray[string], subscribe: bool): T =
@@ -111,15 +119,59 @@ func shortLog*(msg: Message): auto =
   )
 
 func shortLog*(m: RPCMsg): auto =
-  if m.control.isSome:
-    (
-      subscriptions: m.subscriptions,
-      messages: mapIt(m.messages, it.shortLog),
-      control: m.control.get().shortLog
-    )
-  else:
-    (
-      subscriptions: m.subscriptions,
-      messages: mapIt(m.messages, it.shortLog),
-      control: ControlMessage().shortLog
-    )
+  (
+    subscriptions: m.subscriptions,
+    messages: mapIt(m.messages, it.shortLog),
+    control: m.control.get(ControlMessage()).shortLog
+  )
+
+static: expectedFields(PeerInfoMsg, @["peerId", "signedPeerRecord"])
+proc byteSize(peerInfo: PeerInfoMsg): int =
+  peerInfo.peerId.len + peerInfo.signedPeerRecord.len
+
+static: expectedFields(SubOpts, @["subscribe", "topic"])
+proc byteSize(subOpts: SubOpts): int =
+  1 + subOpts.topic.len # 1 byte for the bool
+
+static: expectedFields(Message, @["fromPeer", "data", "seqno", "topicIds", "signature", "key"])
+proc byteSize*(msg: Message): int =
+  msg.fromPeer.len + msg.data.len + msg.seqno.len +
+         msg.signature.len + msg.key.len + msg.topicIds.foldl(a + b.len, 0)
+
+proc byteSize*(msgs: seq[Message]): int =
+  msgs.foldl(a + b.byteSize, 0)
+
+static: expectedFields(ControlIHave, @["topicId", "messageIds"])
+proc byteSize(controlIHave: ControlIHave): int =
+  controlIHave.topicId.len + controlIHave.messageIds.foldl(a + b.len, 0)
+
+proc byteSize*(ihaves: seq[ControlIHave]): int =
+  ihaves.foldl(a + b.byteSize, 0)
+
+static: expectedFields(ControlIWant, @["messageIds"])
+proc byteSize(controlIWant: ControlIWant): int =
+  controlIWant.messageIds.foldl(a + b.len, 0)
+
+proc byteSize*(iwants: seq[ControlIWant]): int =
+  iwants.foldl(a + b.byteSize, 0)
+
+static: expectedFields(ControlGraft, @["topicId"])
+proc byteSize(controlGraft: ControlGraft): int =
+  controlGraft.topicId.len
+
+static: expectedFields(ControlPrune, @["topicId", "peers", "backoff"])
+proc byteSize(controlPrune: ControlPrune): int =
+  controlPrune.topicId.len + controlPrune.peers.foldl(a + b.byteSize, 0) + 8 # 8 bytes for uint64
+
+static: expectedFields(ControlMessage, @["ihave", "iwant", "graft", "prune", "idontwant"])
+proc byteSize(control: ControlMessage): int =
+  control.ihave.foldl(a + b.byteSize, 0) + control.iwant.foldl(a + b.byteSize, 0) +
+  control.graft.foldl(a + b.byteSize, 0) + control.prune.foldl(a + b.byteSize, 0) +
+  control.idontwant.foldl(a + b.byteSize, 0)
+
+static: expectedFields(RPCMsg, @["subscriptions", "messages", "control", "ping", "pong"])
+proc byteSize*(rpc: RPCMsg): int =
+  result = rpc.subscriptions.foldl(a + b.byteSize, 0) + byteSize(rpc.messages) +
+           rpc.ping.len + rpc.pong.len
+  rpc.control.withValue(ctrl):
+    result += ctrl.byteSize

libp2p/protocols/pubsub/rpc/protobuf.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 options
 import stew/assign2
@@ -90,6 +87,8 @@ proc write*(pb: var ProtoBuffer, field: int, control: ControlMessage) =
     ipb.write(3, graft)
   for prune in control.prune:
     ipb.write(4, prune)
+  for idontwant in control.idontwant:
+    ipb.write(5, idontwant)
   if len(ipb.buffer) > 0:
     ipb.finish()
     pb.write(field, ipb)
@@ -213,6 +212,7 @@ proc decodeControl*(pb: ProtoBuffer): ProtoResult[Option[ControlMessage]] {.
     var iwantpbs: seq[seq[byte]]
     var graftpbs: seq[seq[byte]]
     var prunepbs: seq[seq[byte]]
+    var idontwant: seq[seq[byte]]
     if ? cpb.getRepeatedField(1, ihavepbs):
       for item in ihavepbs:
         control.ihave.add(? decodeIHave(initProtoBuffer(item)))
@@ -225,6 +225,9 @@ proc decodeControl*(pb: ProtoBuffer): ProtoResult[Option[ControlMessage]] {.
     if ? cpb.getRepeatedField(4, prunepbs):
       for item in prunepbs:
         control.prune.add(? decodePrune(initProtoBuffer(item)))
+    if ? cpb.getRepeatedField(5, idontwant):
+      for item in idontwant:
+        control.idontwant.add(? decodeIWant(initProtoBuffer(item)))
     trace "decodeControl: message statistics", graft_count = len(control.graft),
                                                prune_count = len(control.prune),
                                                ihave_count = len(control.ihave),
@@ -317,8 +320,14 @@ proc encodeRpcMsg*(msg: RPCMsg, anonymize: bool): seq[byte] =
     pb.write(1, item)
   for item in msg.messages:
     pb.write(2, item, anonymize)
-  if msg.control.isSome():
-    pb.write(3, msg.control.get())
+  msg.control.withValue(control):
+    pb.write(3, control)
+  # nim-libp2p extension, using fields which are unlikely to be used
+  # by other extensions
+  if msg.ping.len > 0:
+    pb.write(60, msg.ping)
+  if msg.pong.len > 0:
+    pb.write(61, msg.pong)
   if len(pb.buffer) > 0:
     pb.finish()
   pb.buffer
@@ -326,8 +335,10 @@ proc encodeRpcMsg*(msg: RPCMsg, anonymize: bool): seq[byte] =
 proc decodeRpcMsg*(msg: seq[byte]): ProtoResult[RPCMsg] {.inline.} =
   trace "decodeRpcMsg: decoding message", msg = msg.shortLog()
   var pb = initProtoBuffer(msg, maxSize = uint.high)
-  var rpcMsg = ok(RPCMsg())
-  assign(rpcMsg.get().messages, ? pb.decodeMessages())
-  assign(rpcMsg.get().subscriptions, ? pb.decodeSubscriptions())
-  assign(rpcMsg.get().control, ? pb.decodeControl())
-  rpcMsg
+  var rpcMsg = RPCMsg()
+  assign(rpcMsg.messages, ? pb.decodeMessages())
+  assign(rpcMsg.subscriptions, ? pb.decodeSubscriptions())
+  assign(rpcMsg.control, ? pb.decodeControl())
+  discard ? pb.getField(60, rpcMsg.ping)
+  discard ? pb.getField(61, rpcMsg.pong)
+  ok(rpcMsg)

libp2p/protocols/pubsub/timedcache.nim

@@ -7,15 +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]
 
 import chronos/timer, stew/results
 
+import ../../utility
+
 const Timeout* = 10.seconds # default timeout in ms
 
 type
@@ -58,9 +57,9 @@ func put*[K](t: var TimedCache[K], k: K, now = Moment.now()): bool =
 
   var previous = t.del(k) # Refresh existing item
 
-  let addedAt =
-    if previous.isSome: previous.get().addedAt
-    else: now
+  var addedAt = now
+  previous.withValue(previous):
+    addedAt = previous.addedAt
 
   let node = TimedEntry[K](key: k, addedAt: addedAt, expiresAt: now + t.timeout)
 

libp2p/protocols/rendezvous.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 tables, sequtils, sugar, sets, options
+import tables, sequtils, sugar, sets
+import metrics except collect
 import chronos,
        chronicles,
        bearssl/rand,
-       stew/[byteutils, objects]
+       stew/[byteutils, objects, results]
 import ./protocol,
        ../switch,
        ../routing_record,
@@ -30,6 +28,11 @@ export chronicles
 logScope:
   topics = "libp2p discovery rendezvous"
 
+declareCounter(libp2p_rendezvous_register, "number of advertise requests")
+declareCounter(libp2p_rendezvous_discover, "number of discovery requests")
+declareGauge(libp2p_rendezvous_registered, "number of registered peers")
+declareGauge(libp2p_rendezvous_namespaces, "number of registered namespaces")
+
 const
   RendezVousCodec* = "/rendezvous/1.0.0"
   MinimumDuration* = 2.hours
@@ -65,34 +68,34 @@ type
   Register = object
     ns : string
     signedPeerRecord: seq[byte]
-    ttl: Option[uint64] # in seconds
+    ttl: Opt[uint64] # in seconds
 
   RegisterResponse = object
     status: ResponseStatus
-    text: Option[string]
-    ttl: Option[uint64] # in seconds
+    text: Opt[string]
+    ttl: Opt[uint64] # in seconds
 
   Unregister = object
     ns: string
 
   Discover = object
     ns: string
-    limit: Option[uint64]
-    cookie: Option[seq[byte]]
+    limit: Opt[uint64]
+    cookie: Opt[seq[byte]]
 
   DiscoverResponse = object
     registrations: seq[Register]
-    cookie: Option[seq[byte]]
+    cookie: Opt[seq[byte]]
     status: ResponseStatus
-    text: Option[string]
+    text: Opt[string]
 
   Message = object
     msgType: MessageType
-    register: Option[Register]
-    registerResponse: Option[RegisterResponse]
-    unregister: Option[Unregister]
-    discover: Option[Discover]
-    discoverResponse: Option[DiscoverResponse]
+    register: Opt[Register]
+    registerResponse: Opt[RegisterResponse]
+    unregister: Opt[Unregister]
+    discover: Opt[Discover]
+    discoverResponse: Opt[DiscoverResponse]
 
 proc encode(c: Cookie): ProtoBuffer =
   result = initProtoBuffer()
@@ -104,17 +107,17 @@ proc encode(r: Register): ProtoBuffer =
   result = initProtoBuffer()
   result.write(1, r.ns)
   result.write(2, r.signedPeerRecord)
-  if r.ttl.isSome():
-    result.write(3, r.ttl.get())
+  r.ttl.withValue(ttl):
+    result.write(3, ttl)
   result.finish()
 
 proc encode(rr: RegisterResponse): ProtoBuffer =
   result = initProtoBuffer()
   result.write(1, rr.status.uint)
-  if rr.text.isSome():
-    result.write(2, rr.text.get())
-  if rr.ttl.isSome():
-    result.write(3, rr.ttl.get())
+  rr.text.withValue(text):
+    result.write(2, text)
+  rr.ttl.withValue(ttl):
+    result.write(3, ttl)
   result.finish()
 
 proc encode(u: Unregister): ProtoBuffer =
@@ -125,48 +128,48 @@ proc encode(u: Unregister): ProtoBuffer =
 proc encode(d: Discover): ProtoBuffer =
   result = initProtoBuffer()
   result.write(1, d.ns)
-  if d.limit.isSome():
-    result.write(2, d.limit.get())
-  if d.cookie.isSome():
-    result.write(3, d.cookie.get())
+  d.limit.withValue(limit):
+    result.write(2, limit)
+  d.cookie.withValue(cookie):
+    result.write(3, cookie)
   result.finish()
 
-proc encode(d: DiscoverResponse): ProtoBuffer =
+proc encode(dr: DiscoverResponse): ProtoBuffer =
   result = initProtoBuffer()
-  for reg in d.registrations:
+  for reg in dr.registrations:
     result.write(1, reg.encode())
-  if d.cookie.isSome():
-    result.write(2, d.cookie.get())
-  result.write(3, d.status.uint)
-  if d.text.isSome():
-    result.write(4, d.text.get())
+  dr.cookie.withValue(cookie):
+    result.write(2, cookie)
+  result.write(3, dr.status.uint)
+  dr.text.withValue(text):
+    result.write(4, text)
   result.finish()
 
 proc encode(msg: Message): ProtoBuffer =
   result = initProtoBuffer()
   result.write(1, msg.msgType.uint)
-  if msg.register.isSome():
-    result.write(2, msg.register.get().encode())
-  if msg.registerResponse.isSome():
-    result.write(3, msg.registerResponse.get().encode())
-  if msg.unregister.isSome():
-    result.write(4, msg.unregister.get().encode())
-  if msg.discover.isSome():
-    result.write(5, msg.discover.get().encode())
-  if msg.discoverResponse.isSome():
-    result.write(6, msg.discoverResponse.get().encode())
+  msg.register.withValue(register):
+    result.write(2, register.encode())
+  msg.registerResponse.withValue(registerResponse):
+    result.write(3, registerResponse.encode())
+  msg.unregister.withValue(unregister):
+    result.write(4, unregister.encode())
+  msg.discover.withValue(discover):
+    result.write(5, discover.encode())
+  msg.discoverResponse.withValue(discoverResponse):
+    result.write(6, discoverResponse.encode())
   result.finish()
 
-proc decode(_: typedesc[Cookie], buf: seq[byte]): Option[Cookie] =
+proc decode(_: typedesc[Cookie], buf: seq[byte]): Opt[Cookie] =
   var c: Cookie
   let
     pb = initProtoBuffer(buf)
     r1 = pb.getRequiredField(1, c.offset)
     r2 = pb.getRequiredField(2, c.ns)
-  if r1.isErr() or r2.isErr(): return none(Cookie)
-  some(c)
+  if r1.isErr() or r2.isErr(): return Opt.none(Cookie)
+  Opt.some(c)
 
-proc decode(_: typedesc[Register], buf: seq[byte]): Option[Register] =
+proc decode(_: typedesc[Register], buf: seq[byte]): Opt[Register] =
   var
     r: Register
     ttl: uint64
@@ -175,11 +178,11 @@ proc decode(_: typedesc[Register], buf: seq[byte]): Option[Register] =
     r1 = pb.getRequiredField(1, r.ns)
     r2 = pb.getRequiredField(2, r.signedPeerRecord)
     r3 = pb.getField(3, ttl)
-  if r1.isErr() or r2.isErr() or r3.isErr(): return none(Register)
-  if r3.get(): r.ttl = some(ttl)
-  some(r)
+  if r1.isErr() or r2.isErr() or r3.isErr(): return Opt.none(Register)
+  if r3.get(false): r.ttl = Opt.some(ttl)
+  Opt.some(r)
 
-proc decode(_: typedesc[RegisterResponse], buf: seq[byte]): Option[RegisterResponse] =
+proc decode(_: typedesc[RegisterResponse], buf: seq[byte]): Opt[RegisterResponse] =
   var
     rr: RegisterResponse
     statusOrd: uint
@@ -191,20 +194,20 @@ proc decode(_: typedesc[RegisterResponse], buf: seq[byte]): Option[RegisterRespo
     r2 = pb.getField(2, text)
     r3 = pb.getField(3, ttl)
   if r1.isErr() or r2.isErr() or r3.isErr() or
-     not checkedEnumAssign(rr.status, statusOrd): return none(RegisterResponse)
-  if r2.get(): rr.text = some(text)
-  if r3.get(): rr.ttl = some(ttl)
-  some(rr)
+     not checkedEnumAssign(rr.status, statusOrd): return Opt.none(RegisterResponse)
+  if r2.get(false): rr.text = Opt.some(text)
+  if r3.get(false): rr.ttl = Opt.some(ttl)
+  Opt.some(rr)
 
-proc decode(_: typedesc[Unregister], buf: seq[byte]): Option[Unregister] =
+proc decode(_: typedesc[Unregister], buf: seq[byte]): Opt[Unregister] =
   var u: Unregister
   let
     pb = initProtoBuffer(buf)
     r1 = pb.getRequiredField(1, u.ns)
-  if r1.isErr(): return none(Unregister)
-  some(u)
+  if r1.isErr(): return Opt.none(Unregister)
+  Opt.some(u)
 
-proc decode(_: typedesc[Discover], buf: seq[byte]): Option[Discover] =
+proc decode(_: typedesc[Discover], buf: seq[byte]): Opt[Discover] =
   var
     d: Discover
     limit: uint64
@@ -214,12 +217,12 @@ proc decode(_: typedesc[Discover], buf: seq[byte]): Option[Discover] =
     r1 = pb.getRequiredField(1, d.ns)
     r2 = pb.getField(2, limit)
     r3 = pb.getField(3, cookie)
-  if r1.isErr() or r2.isErr() or r3.isErr: return none(Discover)
-  if r2.get(): d.limit = some(limit)
-  if r3.get(): d.cookie = some(cookie)
-  some(d)
+  if r1.isErr() or r2.isErr() or r3.isErr: return Opt.none(Discover)
+  if r2.get(false): d.limit = Opt.some(limit)
+  if r3.get(false): d.cookie = Opt.some(cookie)
+  Opt.some(d)
 
-proc decode(_: typedesc[DiscoverResponse], buf: seq[byte]): Option[DiscoverResponse] =
+proc decode(_: typedesc[DiscoverResponse], buf: seq[byte]): Opt[DiscoverResponse] =
   var
     dr: DiscoverResponse
     registrations: seq[seq[byte]]
@@ -233,48 +236,47 @@ proc decode(_: typedesc[DiscoverResponse], buf: seq[byte]): Option[DiscoverRespo
     r3 = pb.getRequiredField(3, statusOrd)
     r4 = pb.getField(4, text)
   if r1.isErr() or r2.isErr() or r3.isErr or r4.isErr() or
-     not checkedEnumAssign(dr.status, statusOrd): return none(DiscoverResponse)
+     not checkedEnumAssign(dr.status, statusOrd): return Opt.none(DiscoverResponse)
   for reg in registrations:
     var r: Register
-    let regOpt = Register.decode(reg)
-    if regOpt.isNone(): return none(DiscoverResponse)
-    dr.registrations.add(regOpt.get())
-  if r2.get(): dr.cookie = some(cookie)
-  if r4.get(): dr.text = some(text)
-  some(dr)
+    let regOpt = Register.decode(reg).valueOr:
+      return
+    dr.registrations.add(regOpt)
+  if r2.get(false): dr.cookie = Opt.some(cookie)
+  if r4.get(false): dr.text = Opt.some(text)
+  Opt.some(dr)
 
-proc decode(_: typedesc[Message], buf: seq[byte]): Option[Message] =
+proc decode(_: typedesc[Message], buf: seq[byte]): Opt[Message] =
   var
     msg: Message
     statusOrd: uint
     pbr, pbrr, pbu, pbd, pbdr: ProtoBuffer
-  let
-    pb = initProtoBuffer(buf)
-    r1 = pb.getRequiredField(1, statusOrd)
-    r2 = pb.getField(2, pbr)
-    r3 = pb.getField(3, pbrr)
-    r4 = pb.getField(4, pbu)
-    r5 = pb.getField(5, pbd)
-    r6 = pb.getField(6, pbdr)
-  if r1.isErr() or r2.isErr() or r3.isErr() or
-     r4.isErr() or r5.isErr() or r6.isErr() or
-     not checkedEnumAssign(msg.msgType, statusOrd): return none(Message)
-  if r2.get():
+  let pb = initProtoBuffer(buf)
+
+  ? pb.getRequiredField(1, statusOrd).toOpt
+  if not checkedEnumAssign(msg.msgType, statusOrd): return Opt.none(Message)
+
+  if ? pb.getField(2, pbr).optValue:
     msg.register = Register.decode(pbr.buffer)
-    if msg.register.isNone(): return none(Message)
-  if r3.get():
+    if msg.register.isNone(): return Opt.none(Message)
+
+  if ? pb.getField(3, pbrr).optValue:
     msg.registerResponse = RegisterResponse.decode(pbrr.buffer)
-    if msg.registerResponse.isNone(): return none(Message)
-  if r4.get():
+    if msg.registerResponse.isNone(): return Opt.none(Message)
+
+  if ? pb.getField(4, pbu).optValue:
     msg.unregister = Unregister.decode(pbu.buffer)
-    if msg.unregister.isNone(): return none(Message)
-  if r5.get():
+    if msg.unregister.isNone(): return Opt.none(Message)
+
+  if ? pb.getField(5, pbd).optValue:
     msg.discover = Discover.decode(pbd.buffer)
-    if msg.discover.isNone(): return none(Message)
-  if r6.get():
+    if msg.discover.isNone(): return Opt.none(Message)
+
+  if ? pb.getField(6, pbdr).optValue:
     msg.discoverResponse = DiscoverResponse.decode(pbdr.buffer)
-    if msg.discoverResponse.isNone(): return none(Message)
-  some(msg)
+    if msg.discoverResponse.isNone(): return Opt.none(Message)
+
+  Opt.some(msg)
 
 
 type
@@ -314,7 +316,7 @@ proc sendRegisterResponse(conn: Connection,
                           ttl: uint64) {.async.} =
   let msg = encode(Message(
         msgType: MessageType.RegisterResponse,
-        registerResponse: some(RegisterResponse(status: Ok, ttl: some(ttl)))))
+        registerResponse: Opt.some(RegisterResponse(status: Ok, ttl: Opt.some(ttl)))))
   await conn.writeLp(msg.buffer)
 
 proc sendRegisterResponseError(conn: Connection,
@@ -322,7 +324,7 @@ proc sendRegisterResponseError(conn: Connection,
                                text: string = "") {.async.} =
   let msg = encode(Message(
         msgType: MessageType.RegisterResponse,
-        registerResponse: some(RegisterResponse(status: status, text: some(text)))))
+        registerResponse: Opt.some(RegisterResponse(status: status, text: Opt.some(text)))))
   await conn.writeLp(msg.buffer)
 
 proc sendDiscoverResponse(conn: Connection,
@@ -330,10 +332,10 @@ proc sendDiscoverResponse(conn: Connection,
                           cookie: Cookie) {.async.} =
   let msg = encode(Message(
         msgType: MessageType.DiscoverResponse,
-        discoverResponse: some(DiscoverResponse(
+        discoverResponse: Opt.some(DiscoverResponse(
             status: Ok,
             registrations: s,
-            cookie: some(cookie.encode().buffer)
+            cookie: Opt.some(cookie.encode().buffer)
           ))
         ))
   await conn.writeLp(msg.buffer)
@@ -343,7 +345,7 @@ proc sendDiscoverResponseError(conn: Connection,
                                text: string = "") {.async.} =
   let msg = encode(Message(
         msgType: MessageType.DiscoverResponse,
-        discoverResponse: some(DiscoverResponse(status: status, text: some(text)))))
+        discoverResponse: Opt.some(DiscoverResponse(status: status, text: Opt.some(text)))))
   await conn.writeLp(msg.buffer)
 
 proc countRegister(rdv: RendezVous, peerId: PeerId): int =
@@ -378,6 +380,7 @@ proc save(rdv: RendezVous,
 
 proc register(rdv: RendezVous, conn: Connection, r: Register): Future[void] =
   trace "Received Register", peerId = conn.peerId, ns = r.ns
+  libp2p_rendezvous_register.inc()
   if r.ns.len notin 1..255:
     return conn.sendRegisterResponseError(InvalidNamespace)
   let ttl = r.ttl.get(MinimumTTL)
@@ -389,6 +392,8 @@ proc register(rdv: RendezVous, conn: Connection, r: Register): Future[void] =
   if rdv.countRegister(conn.peerId) >= RegistrationLimitPerPeer:
     return conn.sendRegisterResponseError(NotAuthorized, "Registration limit reached")
   rdv.save(r.ns, conn.peerId, r)
+  libp2p_rendezvous_registered.inc()
+  libp2p_rendezvous_namespaces.set(int64(rdv.namespaces.len))
   conn.sendRegisterResponse(ttl)
 
 proc unregister(rdv: RendezVous, conn: Connection, u: Unregister) =
@@ -398,11 +403,13 @@ proc unregister(rdv: RendezVous, conn: Connection, u: Unregister) =
     for index in rdv.namespaces[nsSalted]:
       if rdv.registered[index].peerId == conn.peerId:
         rdv.registered[index].expiration = rdv.defaultDT
+        libp2p_rendezvous_registered.dec()
   except KeyError:
     return
 
 proc discover(rdv: RendezVous, conn: Connection, d: Discover) {.async.} =
   trace "Received Discover", peerId = conn.peerId, ns = d.ns
+  libp2p_rendezvous_discover.inc()
   if d.ns.len notin 0..255:
     await conn.sendDiscoverResponseError(InvalidNamespace)
     return
@@ -411,7 +418,7 @@ proc discover(rdv: RendezVous, conn: Connection, d: Discover) {.async.} =
     cookie =
       if d.cookie.isSome():
         try:
-          Cookie.decode(d.cookie.get()).get()
+          Cookie.decode(d.cookie.tryGet()).tryGet()
         except CatchableError:
           await conn.sendDiscoverResponseError(InvalidCookie)
           return
@@ -442,7 +449,7 @@ proc discover(rdv: RendezVous, conn: Connection, d: Discover) {.async.} =
           break
         if reg.expiration < n or index.uint64 <= cookie.offset: continue
         limit.dec()
-        reg.data.ttl = some((reg.expiration - Moment.now()).seconds.uint64)
+        reg.data.ttl = Opt.some((reg.expiration - Moment.now()).seconds.uint64)
         reg.data
   rdv.rng.shuffle(s)
   await conn.sendDiscoverResponse(s, Cookie(offset: offset.uint64, ns: d.ns))
@@ -457,12 +464,13 @@ proc advertisePeer(rdv: RendezVous,
       await conn.writeLp(msg)
       let
         buf = await conn.readLp(4096)
-        msgRecv = Message.decode(buf).get()
+        msgRecv = Message.decode(buf).tryGet()
       if msgRecv.msgType != MessageType.RegisterResponse:
         trace "Unexpected register response", peer, msgType = msgRecv.msgType
-      elif msgRecv.registerResponse.isNone() or
-           msgRecv.registerResponse.get().status != ResponseStatus.Ok:
+      elif msgRecv.registerResponse.tryGet().status != ResponseStatus.Ok:
         trace "Refuse to register", peer, response = msgRecv.registerResponse
+      else:
+        trace "Successfully registered", peer, response = msgRecv.registerResponse
     except CatchableError as exc:
       trace "exception in the advertise", error = exc.msg
     finally:
@@ -470,19 +478,18 @@ proc advertisePeer(rdv: RendezVous,
   await rdv.sema.acquire()
   discard await advertiseWrap().withTimeout(5.seconds)
 
-proc advertise*(rdv: RendezVous,
+method advertise*(rdv: RendezVous,
                 ns: string,
-                ttl: Duration = MinimumDuration) {.async.} =
-  let sprBuff = rdv.switch.peerInfo.signedPeerRecord.encode()
-  if sprBuff.isErr():
+                ttl: Duration = MinimumDuration) {.async, base.} =
+  let sprBuff = rdv.switch.peerInfo.signedPeerRecord.encode().valueOr:
     raise newException(RendezVousError, "Wrong Signed Peer Record")
   if ns.len notin 1..255:
     raise newException(RendezVousError, "Invalid namespace")
   if ttl notin MinimumDuration..MaximumDuration:
     raise newException(RendezVousError, "Invalid time to live")
   let
-    r = Register(ns: ns, signedPeerRecord: sprBuff.get(), ttl: some(ttl.seconds.uint64))
-    msg = encode(Message(msgType: MessageType.Register, register: some(r)))
+    r = Register(ns: ns, signedPeerRecord: sprBuff, ttl: Opt.some(ttl.seconds.uint64))
+    msg = encode(Message(msgType: MessageType.Register, register: Opt.some(r)))
   rdv.save(ns, rdv.switch.peerInfo.peerId, r)
   let fut = collect(newSeq()):
     for peer in rdv.peers:
@@ -498,7 +505,9 @@ proc requestLocally*(rdv: RendezVous, ns: string): seq[PeerRecord] =
     collect(newSeq()):
       for index in rdv.namespaces[nsSalted]:
         if rdv.registered[index].expiration > n:
-          SignedPeerRecord.decode(rdv.registered[index].data.signedPeerRecord).get().data
+          let res = SignedPeerRecord.decode(rdv.registered[index].data.signedPeerRecord).valueOr:
+            continue
+          res.data
   except KeyError as exc:
     @[]
 
@@ -519,38 +528,42 @@ proc request*(rdv: RendezVous,
   proc requestPeer(peer: PeerId) {.async.} =
     let conn = await rdv.switch.dial(peer, RendezVousCodec)
     defer: await conn.close()
-    d.limit = some(limit)
+    d.limit = Opt.some(limit)
     d.cookie =
       try:
-        some(rdv.cookiesSaved[peer][ns])
+        Opt.some(rdv.cookiesSaved[peer][ns])
       except KeyError as exc:
-        none(seq[byte])
+        Opt.none(seq[byte])
     await conn.writeLp(encode(Message(
       msgType: MessageType.Discover,
-      discover: some(d))).buffer)
+      discover: Opt.some(d))).buffer)
     let
       buf = await conn.readLp(65536)
-      msgRcv = Message.decode(buf).get()
-    if msgRcv.msgType != MessageType.DiscoverResponse or
-       msgRcv.discoverResponse.isNone():
+      msgRcv = Message.decode(buf).valueOr:
+        debug "Message undecodable"
+        return
+    if msgRcv.msgType != MessageType.DiscoverResponse:
       debug "Unexpected discover response", msgType = msgRcv.msgType
       return
-    let resp = msgRcv.discoverResponse.get()
+    let resp = msgRcv.discoverResponse.valueOr:
+      debug "Discover response is empty"
+      return
     if resp.status != ResponseStatus.Ok:
       trace "Cannot discover", ns, status = resp.status, text = resp.text
       return
-    if resp.cookie.isSome() and resp.cookie.get().len < 1000:
-      if rdv.cookiesSaved.hasKeyOrPut(peer, {ns: resp.cookie.get()}.toTable):
-        rdv.cookiesSaved[peer][ns] = resp.cookie.get()
+    resp.cookie.withValue(cookie):
+      if  cookie.len() < 1000 and rdv.cookiesSaved.hasKeyOrPut(peer, {ns: cookie}.toTable()):
+        rdv.cookiesSaved[peer][ns] = cookie
     for r in resp.registrations:
       if limit == 0: return
-      if r.ttl.isNone() or r.ttl.get() > MaximumTTL: continue
-      let sprRes = SignedPeerRecord.decode(r.signedPeerRecord)
-      if sprRes.isErr(): continue
-      let pr = sprRes.get().data
+      let ttl = r.ttl.get(MaximumTTL + 1)
+      if ttl > MaximumTTL: continue
+      let
+        spr = SignedPeerRecord.decode(r.signedPeerRecord).valueOr: continue
+        pr = spr.data
       if s.hasKey(pr.peerId):
         let (prSaved, rSaved) = s[pr.peerId]
-        if (prSaved.seqNo == pr.seqNo and rSaved.ttl.get() < r.ttl.get()) or
+        if (prSaved.seqNo == pr.seqNo and rSaved.ttl.get(MaximumTTL) < ttl) or
           prSaved.seqNo < pr.seqNo:
           s[pr.peerId] = (pr, r)
       else:
@@ -589,7 +602,7 @@ proc unsubscribe*(rdv: RendezVous, ns: string) {.async.} =
   rdv.unsubscribeLocally(ns)
   let msg = encode(Message(
     msgType: MessageType.Unregister,
-    unregister: some(Unregister(ns: ns))))
+    unregister: Opt.some(Unregister(ns: ns))))
 
   proc unsubscribePeer(rdv: RendezVous, peerId: PeerId) {.async.} =
     try:
@@ -623,17 +636,17 @@ proc new*(T: typedesc[RendezVous],
     sema: newAsyncSemaphore(SemaphoreDefaultSize)
   )
   logScope: topics = "libp2p discovery rendezvous"
-  proc handleStream(conn: Connection, proto: string) {.async, gcsafe.} =
+  proc handleStream(conn: Connection, proto: string) {.async.} =
     try:
       let
         buf = await conn.readLp(4096)
-        msg = Message.decode(buf).get()
+        msg = Message.decode(buf).tryGet()
       case msg.msgType:
-        of MessageType.Register: await rdv.register(conn, msg.register.get())
+        of MessageType.Register: await rdv.register(conn, msg.register.tryGet())
         of MessageType.RegisterResponse:
           trace "Got an unexpected Register Response", response = msg.registerResponse
-        of MessageType.Unregister: rdv.unregister(conn, msg.unregister.get())
-        of MessageType.Discover: await rdv.discover(conn, msg.discover.get())
+        of MessageType.Unregister: rdv.unregister(conn, msg.unregister.tryGet())
+        of MessageType.Discover: await rdv.discover(conn, msg.discover.tryGet())
         of MessageType.DiscoverResponse:
           trace "Got an unexpected Discover Response", response = msg.discoverResponse
     except CancelledError as exc:
@@ -657,9 +670,13 @@ proc new*(T: typedesc[RendezVous],
 proc deletesRegister(rdv: RendezVous) {.async.} =
   heartbeat "Register timeout", 1.minutes:
     let n = Moment.now()
+    var total = 0
     rdv.registered.flushIfIt(it.expiration < n)
     for data in rdv.namespaces.mvalues():
       data.keepItIf(it >= rdv.registered.offset)
+      total += data.len
+    libp2p_rendezvous_registered.set(int64(total))
+    libp2p_rendezvous_namespaces.set(int64(rdv.namespaces.len))
 
 method start*(rdv: RendezVous) {.async.} =
   if not rdv.registerDeletionLoop.isNil:

libp2p/protocols/secure/noise.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/strformat
 import chronos
@@ -136,7 +133,7 @@ proc encrypt(
     state: var CipherState,
     data: var openArray[byte],
     ad: openArray[byte]): ChaChaPolyTag
-    {.noinit, raises: [Defect, NoiseNonceMaxError].} =
+    {.noinit, raises: [NoiseNonceMaxError].} =
 
   var nonce: ChaChaPolyNonce
   nonce[4..<12] = toBytesLE(state.n)
@@ -148,7 +145,7 @@ proc encrypt(
     raise newException(NoiseNonceMaxError, "Noise max nonce value reached")
 
 proc encryptWithAd(state: var CipherState, ad, data: openArray[byte]): seq[byte]
-  {.raises: [Defect, NoiseNonceMaxError].} =
+  {.raises: [NoiseNonceMaxError].} =
   result = newSeqOfCap[byte](data.len + sizeof(ChaChaPolyTag))
   result.add(data)
 
@@ -160,7 +157,7 @@ proc encryptWithAd(state: var CipherState, ad, data: openArray[byte]): seq[byte]
     tag = byteutils.toHex(tag), data = result.shortLog, nonce = state.n - 1
 
 proc decryptWithAd(state: var CipherState, ad, data: openArray[byte]): seq[byte]
-  {.raises: [Defect, NoiseDecryptTagError, NoiseNonceMaxError].} =
+  {.raises: [NoiseDecryptTagError, NoiseNonceMaxError].} =
   var
     tagIn = data.toOpenArray(data.len - ChaChaPolyTag.len, data.high).intoChaChaPolyTag
     tagOut: ChaChaPolyTag
@@ -209,7 +206,7 @@ proc mixKeyAndHash(ss: var SymmetricState, ikm: openArray[byte]) {.used.} =
   ss.cs = CipherState(k: temp_keys[2])
 
 proc encryptAndHash(ss: var SymmetricState, data: openArray[byte]): seq[byte]
-  {.raises: [Defect, NoiseNonceMaxError].} =
+  {.raises: [NoiseNonceMaxError].} =
   # according to spec if key is empty leave plaintext
   if ss.cs.hasKey:
     result = ss.cs.encryptWithAd(ss.h.data, data)
@@ -218,7 +215,7 @@ proc encryptAndHash(ss: var SymmetricState, data: openArray[byte]): seq[byte]
   ss.mixHash(result)
 
 proc decryptAndHash(ss: var SymmetricState, data: openArray[byte]): seq[byte]
-  {.raises: [Defect, NoiseDecryptTagError, NoiseNonceMaxError].} =
+  {.raises: [NoiseDecryptTagError, NoiseNonceMaxError].} =
   # according to spec if key is empty leave plaintext
   if ss.cs.hasKey and data.len > ChaChaPolyTag.len:
     result = ss.cs.decryptWithAd(ss.h.data, data)
@@ -448,7 +445,7 @@ proc encryptFrame(
     sconn: NoiseConnection,
     cipherFrame: var openArray[byte],
     src: openArray[byte])
-    {.raises: [Defect, NoiseNonceMaxError].} =
+    {.raises: [NoiseNonceMaxError].} =
   # Frame consists of length + cipher data + tag
   doAssert src.len <= MaxPlainSize
   doAssert cipherFrame.len == 2 + src.len + sizeof(ChaChaPolyTag)
@@ -557,8 +554,7 @@ method handshake*(p: Noise, conn: Connection, initiator: bool, peerId: Opt[PeerI
 
     trace "Remote peer id", pid = $pid
 
-    if peerId.isSome():
-      let targetPid = peerId.get()
+    peerId.withValue(targetPid):
       if not targetPid.validate():
         raise newException(NoiseHandshakeError, "Failed to validate expected peerId.")
 

libp2p/protocols/secure/plaintext.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 chronos
 import secure, ../../stream/connection
@@ -22,7 +19,7 @@ type
 
 method init(p: PlainText) {.gcsafe.} =
   proc handle(conn: Connection, proto: string)
-    {.async, gcsafe.} = discard
+    {.async.} = discard
     ## plain text doesn't do anything
 
   p.codec = PlainTextCodec

libp2p/protocols/secure/secio.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/[oids, strformat]
 import bearssl/rand
@@ -262,7 +259,7 @@ proc newSecioConn(conn: Connection,
                   secrets: Secret,
                   order: int,
                   remotePubKey: PublicKey): SecioConn
-                  {.raises: [Defect, LPError].} =
+                  {.raises: [LPError].} =
   ## Create new secure stream/lpstream, using specified hash algorithm ``hash``,
   ## cipher algorithm ``cipher``, stretched keys ``secrets`` and order
   ## ``order``.
@@ -342,8 +339,7 @@ method handshake*(s: Secio, conn: Connection, initiator: bool, peerId: Opt[PeerI
 
   remotePeerId = PeerId.init(remotePubkey).tryGet()
 
-  if peerId.isSome():
-    let targetPid = peerId.get()
+  peerId.withValue(targetPid):
     if not targetPid.validate():
       raise newException(SecioError, "Failed to validate expected peerId.")
 
@@ -439,14 +435,10 @@ proc new*(
   T: typedesc[Secio],
   rng: ref HmacDrbgContext,
   localPrivateKey: PrivateKey): T =
-  let pkRes = localPrivateKey.getPublicKey()
-  if pkRes.isErr:
-    raise newException(Defect, "Invalid private key")
-
   let secio = Secio(
     rng: rng,
     localPrivateKey: localPrivateKey,
-    localPublicKey: pkRes.get(),
+    localPublicKey: localPrivateKey.getPublicKey().expect("Invalid private key"),
   )
   secio.init()
   secio

libp2p/protocols/secure/secure.nim

@@ -8,10 +8,7 @@
 # those terms.
 
 {.push gcsafe.}
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[strformat]
 import stew/results
@@ -138,10 +135,9 @@ method init*(s: Secure) =
 
 method secure*(s: Secure,
                conn: Connection,
-               initiator: bool,
                peerId: Opt[PeerId]):
                Future[Connection] {.base.} =
-  s.handleConn(conn, initiator, peerId)
+  s.handleConn(conn, conn.dir == Direction.Out, peerId)
 
 method readOnce*(s: SecureConn,
                  pbytes: pointer,

libp2p/routing_record.nim

@@ -9,10 +9,7 @@
 
 ## This module implements Routing Records.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/[sequtils, times]
 import pkg/stew/results
@@ -45,14 +42,12 @@ proc decode*(
   ? pb.getRequiredField(2, record.seqNo)
 
   var addressInfos: seq[seq[byte]]
-  let pb3 = ? pb.getRepeatedField(3, addressInfos)
-
-  if pb3:
+  if ? pb.getRepeatedField(3, addressInfos):
     for address in addressInfos:
       var addressInfo = AddressInfo()
       let subProto = initProtoBuffer(address)
       let f = subProto.getField(1, addressInfo.address)
-      if f.isOk() and f.get():
+      if f.get(false):
           record.addresses &= addressInfo
 
     if record.addresses.len == 0:

libp2p/services/autorelayservice.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 chronos, chronicles, times, tables, sequtils
 import ../switch,
@@ -20,7 +17,7 @@ logScope:
   topics = "libp2p autorelay"
 
 type
-  OnReservationHandler = proc (addresses: seq[MultiAddress]) {.gcsafe, raises: [Defect].}
+  OnReservationHandler = proc (addresses: seq[MultiAddress]) {.gcsafe, raises: [].}
 
   AutoRelayService* = ref object of Service
     running: bool
@@ -35,9 +32,12 @@ type
     addressMapper: AddressMapper
     rng: ref HmacDrbgContext
 
+proc isRunning*(self: AutoRelayService): bool =
+  return self.running
+
 proc addressMapper(
   self: AutoRelayService,
-  listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.gcsafe, async.} =
+  listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.async.} =
   return concat(toSeq(self.relayAddresses.values))
 
 proc reserveAndUpdate(self: AutoRelayService, relayPid: PeerId, switch: Switch) {.async.} =
@@ -58,8 +58,8 @@ proc reserveAndUpdate(self: AutoRelayService, relayPid: PeerId, switch: Switch)
         self.onReservation(concat(toSeq(self.relayAddresses.values)))
     await sleepAsync chronos.seconds(ttl - 30)
 
-method setup*(self: AutoRelayService, switch: Switch): Future[bool] {.async, gcsafe.} =
-  self.addressMapper = proc (listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.gcsafe, async.} =
+method setup*(self: AutoRelayService, switch: Switch): Future[bool] {.async.} =
+  self.addressMapper = proc (listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.async.} =
     return await addressMapper(self, listenAddrs)
 
   let hasBeenSetUp = await procCall Service(self).setup(switch)
@@ -83,7 +83,7 @@ proc manageBackedOff(self: AutoRelayService, pid: PeerId) {.async.} =
   self.backingOff.keepItIf(it != pid)
   self.peerAvailable.fire()
 
-proc innerRun(self: AutoRelayService, switch: Switch) {.async, gcsafe.} =
+proc innerRun(self: AutoRelayService, switch: Switch) {.async.} =
   while true:
     # Remove relayPeers that failed
     let peers = toSeq(self.relayPeers.keys())
@@ -116,14 +116,14 @@ proc innerRun(self: AutoRelayService, switch: Switch) {.async, gcsafe.} =
       await self.peerAvailable.wait()
       await sleepAsync(200.millis)
 
-method run*(self: AutoRelayService, switch: Switch) {.async, gcsafe.} =
+method run*(self: AutoRelayService, switch: Switch) {.async.} =
   if self.running:
     trace "Autorelay is already running"
     return
   self.running = true
   self.runner = self.innerRun(switch)
 
-method stop*(self: AutoRelayService, switch: Switch): Future[bool] {.async, gcsafe.} =
+method stop*(self: AutoRelayService, switch: Switch): Future[bool] {.async.} =
   let hasBeenStopped = await procCall Service(self).stop(switch)
   if hasBeenStopped:
     self.running = false

libp2p/services/hpservice.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/[tables, sequtils]
 
@@ -33,13 +30,9 @@ type
     onNewStatusHandler: StatusAndConfidenceHandler
     autoRelayService: AutoRelayService
     autonatService: AutonatService
-    isPublicIPAddrProc: IsPublicIPAddrProc
 
-  IsPublicIPAddrProc* = proc(ta: TransportAddress): bool {.gcsafe, raises: [Defect].}
-
-proc new*(T: typedesc[HPService], autonatService: AutonatService, autoRelayService: AutoRelayService,
-          isPublicIPAddrProc: IsPublicIPAddrProc = isGlobal): T =
-  return T(autonatService: autonatService, autoRelayService: autoRelayService, isPublicIPAddrProc: isPublicIPAddrProc)
+proc new*(T: typedesc[HPService], autonatService: AutonatService, autoRelayService: AutoRelayService): T =
+  return T(autonatService: autonatService, autoRelayService: autoRelayService)
 
 proc tryStartingDirectConn(self: HPService, switch: Switch, peerId: PeerId): Future[bool] {.async.} =
   proc tryConnect(address: MultiAddress): Future[bool] {.async.} =
@@ -52,14 +45,8 @@ proc tryStartingDirectConn(self: HPService, switch: Switch, peerId: PeerId): Fut
   for address in switch.peerStore[AddressBook][peerId]:
     try:
       let isRelayed = address.contains(multiCodec("p2p-circuit"))
-      if isRelayed.isErr() or isRelayed.get():
-        continue
-      if DNS.matchPartial(address):
+      if not isRelayed.get(false) and address.isPublicMA():
         return await tryConnect(address)
-      else:
-        let ta = initTAddress(address)
-        if ta.isOk() and self.isPublicIPAddrProc(ta.get()):
-          return await tryConnect(address)
     except CatchableError as err:
       debug "Failed to create direct connection.", err = err.msg
       continue
@@ -107,10 +94,10 @@ method setup*(self: HPService, switch: Switch): Future[bool] {.async.} =
 
     switch.connManager.addPeerEventHandler(self.newConnectedPeerHandler, PeerEventKind.Joined)
 
-    self.onNewStatusHandler = proc (networkReachability: NetworkReachability, confidence: Option[float]) {.gcsafe, async.} =
-      if networkReachability == NetworkReachability.NotReachable:
+    self.onNewStatusHandler = proc (networkReachability: NetworkReachability, confidence: Opt[float]) {.async.} =
+      if networkReachability == NetworkReachability.NotReachable and not self.autoRelayService.isRunning():
         discard await self.autoRelayService.setup(switch)
-      elif networkReachability == NetworkReachability.Reachable:
+      elif networkReachability == NetworkReachability.Reachable and self.autoRelayService.isRunning():
         discard await self.autoRelayService.stop(switch)
 
       # We do it here instead of in the AutonatService because this is useful only when hole punching.

libp2p/signed_envelope.nim

@@ -9,10 +9,7 @@
 
 ## This module implements Signed Envelope.
 
-when (NimMajor, NimMinor) < (1, 4):
-  {.push raises: [Defect].}
-else:
-  {.push raises: [].}
+{.push raises: [].}
 
 import std/sugar
 import pkg/stew/[results, byteutils]
@@ -115,19 +112,12 @@ proc getField*(pb: ProtoBuffer, field: int,
   if not(res):
     ok(false)
   else:
-    let env = Envelope.decode(buffer, domain)
-    if env.isOk():
-      value = env.get()
-      ok(true)
-    else:
-      err(ProtoError.IncorrectBlob)
+    value = Envelope.decode(buffer, domain).valueOr: return err(ProtoError.IncorrectBlob)
+    ok(true)
 
 proc write*(pb: var ProtoBuffer, field: int, env: Envelope): Result[void, CryptoError] =
-  let e = env.encode()
-
-  if e.isErr():
-    return err(e.error)
-  pb.write(field, e.get())
+  let e = ? env.encode()
+  pb.write(field, e)
   ok()
 
 type
@@ -145,7 +135,7 @@ proc init*[T](_: typedesc[SignedPayload[T]],
                                  T.payloadType(),
                                  data.encode(),
                                  T.payloadDomain)
-  
+
   ok(SignedPayload[T](data: data, envelope: envelope))
 
 proc getField*[T](pb: ProtoBuffer, field: int,

libp2p/stream/bufferstream.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/strformat
 import stew/byteutils