Get blobs from el based in cli flag blob-to-address

* Fix `/eth/v1/beacon/blob_sidecars/` beacon API is the fulu fork epoch is set to the far future epoch.

* Fix Terence's comment.

* adding a test

---------

Co-authored-by: james-prysm <james@prysmaticlabs.com>

.bazelrc

@@ -34,6 +34,7 @@ build:minimal --@io_bazel_rules_go//go/config:tags=minimal
 build:release --compilation_mode=opt
 build:release --stamp
 build:release --define pgo_enabled=1
+build:release --strip=always
 
 # Build binary with cgo symbolizer for debugging / profiling.
 build:cgo_symbolizer --copt=-g

.buildkite-bazelrc

@@ -50,7 +50,7 @@ build:nostamp --nostamp
 
 # Build metadata
 build --build_metadata=ROLE=CI
-build --build_metadata=REPO_URL=https://github.com/prysmaticlabs/prysm.git
+build --build_metadata=REPO_URL=https://github.com/OffchainLabs/prysm.git
 build --workspace_status_command=./hack/workspace_status_ci.sh
 
 # Buildbuddy

.deepsource.toml

@@ -11,7 +11,7 @@ name = "go"
 enabled = true
 
 [analyzers.meta]
-import_paths = ["github.com/prysmaticlabs/prysm/v5"]
+import_paths = ["github.com/OffchainLabs/prysm/v6"]
 
 [[analyzers]]
 name = "test-coverage"

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,6 +1,6 @@
 name: 🐞 Bug report
 description: Report a bug or problem with running Prysm
-labels: ["Bug"]
+type: "Bug"
 body:
   - type: markdown
     attributes:

.github/actions/gomodtidy/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23-alpine
+FROM golang:1.25.1-alpine
 
 COPY entrypoint.sh /entrypoint.sh
 

.github/workflows/changelog.yml

@@ -9,21 +9,21 @@ on:
 
 jobs:
   run-changelog-check:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     steps:
       - name: Checkout source code
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
       - name: Download unclog binary
         uses: dsaltares/fetch-gh-release-asset@aa2ab1243d6e0d5b405b973c89fa4d06a2d0fff7 # 1.1.2
         with:
           repo: OffchainLabs/unclog
-          version: "tags/v0.1.3"
+          version: "tags/v0.1.5"
           file: "unclog"
 
       - name: Get new changelog files
         id: new-changelog-files
-        uses: tj-actions/changed-files@v45
+        uses: OffchainLabs/gh-action-changed-files@9200e69727eb73eb060652b19946b8a2fdfb654b # v4.0.8
         with:
           files: |
             changelog/**.md

.github/workflows/check-specrefs.yml

@@ -0,0 +1,43 @@
+name: Check Spec References
+on: [push, pull_request]
+
+jobs:
+  check-specrefs:
+    runs-on: ubuntu-4
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Check version consistency
+      run: |
+        WORKSPACE_VERSION=$(grep 'consensus_spec_version = ' WORKSPACE | sed 's/.*"\(.*\)"/\1/')
+        ETHSPECIFY_VERSION=$(grep '^version:' specrefs/.ethspecify.yml | sed 's/version: //')
+        if [ "$WORKSPACE_VERSION" != "$ETHSPECIFY_VERSION" ]; then
+          echo "Version mismatch between WORKSPACE and ethspecify"
+          echo "  WORKSPACE: $WORKSPACE_VERSION"
+          echo "  specrefs/.ethspecify.yml: $ETHSPECIFY_VERSION"
+          exit 1
+        else
+          echo "Versions match: $WORKSPACE_VERSION"
+        fi
+
+    - name: Install ethspecify
+      run: python3 -mpip install ethspecify
+
+    - name: Update spec references
+      run: ethspecify process --path=specrefs
+
+    - name: Check for differences
+      run: |
+        if ! git diff --exit-code specrefs >/dev/null; then
+          echo "Spec references are out-of-date!"
+          echo ""
+          git --no-pager diff specrefs
+          exit 1
+        else
+          echo "Spec references are up-to-date!"
+        fi
+
+    - name: Check spec references
+      run: ethspecify check --path=specrefs

.github/workflows/clang-format.yml

@@ -10,7 +10,7 @@ on:
 
 jobs:
   clang-format-checking:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     steps:
       - uses: actions/checkout@v2
       # Is this step failing for you? 

.github/workflows/fuzz.yml

@@ -10,13 +10,13 @@ permissions:
 
 jobs:
   list:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     timeout-minutes: 180
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.23.5'
+          go-version: '1.25.1'
       - id: list
         uses: shogo82148/actions-go-fuzz/list@v0
         with:
@@ -25,7 +25,7 @@ jobs:
       fuzz-tests: ${{steps.list.outputs.fuzz-tests}}
 
   fuzz:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     timeout-minutes: 360
     needs: list
     strategy:
@@ -36,7 +36,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v4
         with:
-          go-version: '1.23.5'
+          go-version: '1.25.1'
       - uses: shogo82148/actions-go-fuzz/run@v0
         with:
           packages: ${{ matrix.package }}

.github/workflows/go.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   formatting:
     name: Formatting
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -22,49 +22,49 @@ jobs:
 
   gosec:
     name: Gosec scan
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     env:
       GO111MODULE: on
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up Go 1.23
+      - name: Set up Go 1.24
         uses: actions/setup-go@v4
         with:
-          go-version: '1.23.5'
+          go-version: '1.25.1'
       - name: Run Gosec Security Scanner
         run: | # https://github.com/securego/gosec/issues/469
           export PATH=$PATH:$(go env GOPATH)/bin
-          go install github.com/securego/gosec/v2/cmd/gosec@v2.19.0
-          gosec -exclude-generated -exclude=G307 -exclude-dir=crypto/bls/herumi ./...
+          go install github.com/securego/gosec/v2/cmd/gosec@v2.22.1
+          gosec -exclude-generated -exclude=G307,G115 -exclude-dir=crypto/bls/herumi ./...
 
   lint:
     name: Lint
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-
-      - name: Set up Go 1.23
-        uses: actions/setup-go@v4
         with:
-          go-version: '1.23.5'
-          id: go
+          fetch-depth: 0
+
+      - name: Set up Go 1.25.1
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.25.1'
 
       - name: Golangci-lint
-        uses: golangci/golangci-lint-action@v5
+        uses: golangci/golangci-lint-action@v8
         with:
-          version: v1.63.4
-          args: --config=.golangci.yml --out-${NO_FUTURE}format colored-line-number
+          version: v2.4
 
   build:
     name: Build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     steps:
-      - name: Set up Go 1.x
+      - name: Set up Go 1.25.1
         uses: actions/setup-go@v4
         with:
-          go-version: '1.23.5'
+          go-version: '1.25.1'
         id: go
 
       - name: Check out code into the Go module directory

.github/workflows/horusec.yaml

@@ -8,7 +8,7 @@ on:
 jobs:
   Horusec_Scan:
     name: horusec-Scan
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-4
     if: github.ref == 'refs/heads/develop'
     steps:
     - name: Check out code
@@ -19,4 +19,4 @@ jobs:
     - name: Running Security Scan
       run: |
         curl -fsSL https://raw.githubusercontent.com/ZupIT/horusec/main/deployments/scripts/install.sh | bash -s latest
-        horusec start -t="10000" -p="./" -e="true" -i="**/crypto/bls/herumi/**, **/**/*_test.go, **/third_party/afl/**, **/crypto/keystore/key.go"
+        horusec start -t="10000" -p="./" -e="true" -i="**/crypto/bls/herumi/**, **/**/*_test.go, **/third_party/afl/**, **/crypto/keystore/key.go"

.golangci.yml

@@ -1,89 +1,41 @@
+version: "2"
 run:
-  timeout: 10m
-  go: '1.23.5'
-
-issues:
-  exclude-files:
-    - validator/web/site_data.go
-    - .*_test.go
-  exclude-dirs:
-    - proto
-    - tools/analyzers
-
+  go: 1.23.5
 linters:
-  enable-all: true
-  disable:
-    # Deprecated linters:
+  enable:
+    - errcheck
+    - ineffassign
     - govet
-
-    # Disabled for now:
-    - asasalint
-    - bodyclose
-    - containedctx
-    - contextcheck
-    - cyclop
-    - depguard
-    - dogsled
-    - dupl
-    - durationcheck
-    - errname
-    - err113
-    - exhaustive
-    - exhaustruct
-    - forbidigo
-    - forcetypeassert
-    - funlen
-    - gci
-    - gochecknoglobals
-    - gochecknoinits
-    - goconst
-    - gocritic
-    - gocyclo
-    - godot
-    - godox
-    - gofumpt
-    - gomoddirectives
-    - gosec
-    - inamedparam
-    - interfacebloat
-    - intrange
-    - ireturn
-    - lll
-    - maintidx
-    - makezero
-    - mnd
-    - musttag
-    - nakedret
-    - nestif
-    - nilnil
-    - nlreturn
-    - noctx
-    - nolintlint
-    - nonamedreturns
-    - nosprintfhostport
-    - perfsprint
-    - prealloc
-    - predeclared
-    - promlinter
-    - protogetter
-    - recvcheck
-    - revive
-    - spancheck
+  disable:
     - staticcheck
-    - stylecheck
-    - tagalign
-    - tagliatelle
-    - thelper
-    - unparam
-    - varnamelen
-    - wrapcheck
-    - wsl
+    - unused
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - validator/web/site_data.go
+      - .*_test.go
+      - proto
+      - tools/analyzers
+      - third_party$
+      - builtin$
+      - examples$
 
-linters-settings:
-  gocognit:
-    # TODO: We should target for < 50
-    min-complexity: 65
-
-output:
-  print-issued-lines: true
-  sort-results: true
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - validator/web/site_data.go
+      - .*_test.go
+      - proto
+      - tools/analyzers
+      - third_party$
+      - builtin$
+      - examples$

.travis.yml

@@ -1,5 +1,5 @@
 language: go
-go_import_path: github.com/prysmaticlabs/prysm
+go_import_path: github.com/OffchainLabs/prysm
 sudo: false
 matrix:
   include:

BUILD.bazel

@@ -6,13 +6,13 @@ load("@io_bazel_rules_go//go:def.bzl", "nogo")
 load("@bazel_skylib//rules:common_settings.bzl", "string_setting")
 load("@prysm//tools/nogo_config:def.bzl", "nogo_config_exclude")
 
-prefix = "github.com/prysmaticlabs/prysm"
+prefix = "github.com/OffchainLabs/prysm"
 
 exports_files([
     "LICENSE.md",
 ])
 
-# gazelle:prefix github.com/prysmaticlabs/prysm/v5
+# gazelle:prefix github.com/OffchainLabs/prysm/v6
 # gazelle:map_kind go_library go_library @prysm//tools/go:def.bzl
 # gazelle:map_kind go_test go_test @prysm//tools/go:def.bzl
 # gazelle:map_kind go_repository go_repository @prysm//tools/go:def.bzl
@@ -165,7 +165,7 @@ STATICCHECK_ANALYZERS = [
     "sa6006",
     "sa9001",
     "sa9002",
-    #"sa9003", # Doesn't build. See https://github.com/dominikh/go-tools/pull/1483
+    "sa9003",
     "sa9004",
     "sa9005",
     "sa9006",
@@ -194,9 +194,11 @@ nogo(
         "//tools/analyzers/gocognit:go_default_library",
         "//tools/analyzers/ineffassign:go_default_library",
         "//tools/analyzers/interfacechecker:go_default_library",
+        "//tools/analyzers/logcapitalization:go_default_library",
         "//tools/analyzers/logruswitherror:go_default_library",
         "//tools/analyzers/maligned:go_default_library",
         "//tools/analyzers/nop:go_default_library",
+        "//tools/analyzers/nopanic:go_default_library",
         "//tools/analyzers/properpermissions:go_default_library",
         "//tools/analyzers/recursivelock:go_default_library",
         "//tools/analyzers/shadowpredecl:go_default_library",

CHANGELOG.md

@@ -4,6 +4,643 @@ All notable changes to this project will be documented in this file.
 
 The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.
 
+## [v6.1.2](https://github.com/prysmaticlabs/prysm/compare/v6.1.1...v6.1.2) - 2025-10-10
+
+This release has several important fixes to improve Prysm's peering, stability, and attestation inclusion on mainnet and all testnets. All node operators are encouraged to update to this release as soon as practical for the best mainnet performance.
+
+### Added
+
+- Added a 1 minute timeout on PruneAttestationOnEpoch operations to prevent very large bolt transactions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15746)
+- Added expected delay before broadcasting light client p2p messages. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15776)
+
+### Changed
+
+- Replaced reflect.TypeOf with reflect.TypeFor. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15627)
+- Bazel builds with `--config=release` now properly apply `--strip=always` to strip debug symbols from the release assets. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15774)
+- Add sources for compute_fork_digest to specrefs. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15699)
+- Aggregate logs when broadcasting data column sidecars (one per root instead of one per sidecar). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15748)
+- `c-kzg-4844`: Update from `v2.1.1` to `v2.1.5`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15708)
+- Process pending attestations as soon as the block arrives. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15791)
+- Compare received LC messages over gossipsub with locally computed ones before forwarding. Also no longer save updates. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15783)
+- Optimize pending attestation processing by adding batching. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15801)
+
+### Removed
+
+- removed unused configs and hides prysm specific configs from `/eth/v1/config/spec` endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15797)
+
+### Fixed
+
+- SSZ-QL: Support nested `List` type (e.g., `ExecutionPayload.Transactions`). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15725)
+- Fixing Unsupported config field kind; value forwarded verbatim errors for type string. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15773)
+- fix /eth/v1/config/spec endpoint to properly skip omitted values. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15777)
+- Fix ProduceSyncCommitteeContribution not returning error when committee index is out of range. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15770)
+- adding in improvements to getduties v2, replaces helpers.PrecomputeCommittees() ( exepensive ) with CommitteeAssignments. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15784)
+- Avoid unnecessary calls to `ExitInformation()`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15764)
+- `inclusionProofKey`: Include the commitments in the key. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15795)
+- Do not reject peers if they have a mismatched version|digest when the next for epoch is FAR_FUTURE_EPOCH. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15798)
+- Don't include entries in the fork schedule if their epoch is set to far future epoch. Avoids reporting next_fork_version == <unscheduled fork>. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15799)
+- Wait for custody info to be initialized before querying them. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15804)
+- fixes level=error msg="Could not clean up dirty states" error="OriginBlockRoot: not found in db" prefix=state-gen error when starting in kurtosis. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15808)
+- Correctly clear disconnected peers from `connected_libp2p_peers` and `connected_libp2p_peers_average_scores`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15807)
+- `buildStatusFromStream`: Respond `statusV2` only if Fulu is enabled. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15818)
+- Send our real earliest available slot when sending a Status request post Fulu instead of `0`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15818)
+- switch to built-in min/max. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15817)
+- `findPeersWithSubnets`: If the filter function returns an error for a given peer, log an error and skip the peer instead of aborting the whole function. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15815)
+- `computeIndicesByRootByPeer`: If the loop returns an error for a given peer, log an error and skip the peer instead of aborting the whole function. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15815)
+- Fixed issue #15738 where separate goroutines assume sole responsibility for topic registration. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15779)
+
+## [v6.1.0](https://github.com/prysmaticlabs/prysm/compare/v6.0.5...v6.1.0) and [v6.1.1](https://github.com/prysmaticlabs/prysm/compare/v6.1.0...v6.1.1) - 2025-09-26
+
+This release has support for Fusaka testnets as well as many mainnet improvements. Testnet operators are required to updated prior to the testnet fork date. See [PR #15721](https://github.com/OffchainLabs/prysm/pull/15721).
+
+Mainnet operators are encouraged to update per their regular update cadence. 
+
+Note: This release was re-issued as v6.1.1 to distribute release assets without debug symbols. See issue [#15760](https://github.com/OffchainLabs/prysm/issues/15760).
+
+#### Noteworthy improvements, changes and bugfixes:
+- The `--disable-experimental-state` beacon-node flag has been removed, marking the full graduation of the [Copy-on-write design](https://hackmd.io/zlTJ6Qe_RiueT3y2R77BvA) for BeaconState fields, which reduces the memory overhead of keeping multiple BeaconStates in RAM for block processing. Congrats @rkapka!
+- The behavior set by the `--attest_timely` flag is now on by default, with the flag itself deprecated.
+- GetDutiesV2 introduced, lowering duty request latency and beacon-node load. Multiple other improvements and bugfixes have been made to harden the validator run loop.
+- New validator flag `--max-health-checks` configures a validator to switch to a fallback beacon node after the given number of health check failures.
+- Improvements to rest-mode validator, defaulting to SSZ where available and adding SSZ support to more Beacon API endpoints.
+- Beacon API now honors the gzip content-encoding header.
+- Log timestamps now include milliseconds.
+- Full fusaka support for testnets! 
+
+**Special thanks to external contributors!**: @Alleysira, @KaloyanTanev, @rose2221
+
+[1] To override this limit, use the validator flag `--suggested-gas-limit` or set the `builder.gas_limit` setting in your [proposer settings file](https://prysm.offchainlabs.com/docs/configure-prysm/fee-recipient/#advanced-configure-mev-builder-and-gas-limit).
+
+
+### Added
+
+- PeerDAS: Add `CustodyInfo` in `BeaconNode`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15378)
+- GetDutiesV2 gRPC function, removes committee list from duties, replaced with committee length, validator committee index. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15273)
+- Add SSZ support for two attestation APIs: `/eth/v1/validator/attestation_data` and. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15377)
+- Added feature flag for validator client to use get duties v2. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15380)
+- PeerDAS: Implement DAS. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15367)
+- `verifyBlobCommitmentCount`: Print max allowed blob count in error message. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15386)
+- Data column support for beacon api event end point. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15387)
+- Implement EIP-7917: Stable proposer lookahead. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15129)
+- Implement `dataColumnSidecarByRootRPCHandler`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15405)
+- New ssz-only flag for validator client to enable calling rest apis in SSZ, starting with get block endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15390)
+- Implement `dataColumnSidecarsByRangeRPCHandler`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15421)
+- Add SSZ support for `submitPoolAttestationsV2` beacon API. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15422)
+- New `StatusV2` proto message. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15423)
+- Implement `SendDataColumnSidecarsByRangeRequest`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15430)
+- Implement `SendDataColumnSidecarsByRootRequest`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15430)
+- Implement beacon API blob sidecar enpoint for Fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15436)
+- PeerDAS: Implement the new Fulu Metadata. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15440)
+- PeerDAS: Implement reconstruction. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15454)
+- Implement engine method `GetBlobsV2`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15469)
+- Implement execution `ReconstructDataColumnSidecars`, which reconstruct data column sidecars from data fetched from the execution layer. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15469)
+- new `--batch-verifier-limit` flag to configure max number of signatures to batch verify on gossip. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15467)
+- `disable-attest-timely` flag to disable attest timely. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15410)
+- Added `max-health-checks` flag that sets the maximum times the validator tries to check the health of the beacon node before timing out. 0 or a negative number is indefinite. (the default is 0). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15401)
+- Add method `VersionToForkEpochMap()` to the `BeaconChainConfig` in the `params` package. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15482)
+- Add log capitalization analyzer and apply changes across codebase. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15452)
+- Slot aware cache for seen data column gossip p2p to reduce memory usages. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15477)
+- **Gzip Compression for Beacon API:**. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14982)
+- Implement data column sidecars reconstruction with data retrieved from the execution client when receiving a block via gossip. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15483)
+- Add support for parsing and handling `ExecutionPayloadAndBlobsBundleV2`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15503)
+- Added new PRYSM_API_OVERRIDE_ACCEPT environment variable to override ssz accept header as a replacement to flag. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15433)
+- Implements the `/eth/v1/beacon/states/{state_id}/proposer_lookahead` beacon api endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15525)
+- Added new metadata fields (attnets,syncnets,custody_group_count) to `/eth/v1/node/identity`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15506)
+- Add BLOB_SCHEDULE field to `/eth/v1/config/spec` endpoint response to expose blob scheduling configuration for networks. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15485)
+- Add timing metric `publish_block_v2_duration_milliseconds` to measure processing duration of the `PublishBlockV2` beacon API endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15539)
+- Add Fulu case for `saveStatesEfficientInternal`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15553)
+- Support for fusaka `nfd` enr field, and changes to the semantics of the eth2 field. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15501)
+- Implement post-Fulu MEV-boost protocol changes where relays only return status codes for blinded block submissions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15486)
+- Added fulu block support to StreamBlocksAltair. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15583)
+- All outbound HTTP requests from the validator client now include a custom `User-Agent` header in the format `Prysm/<name>/<version>`. This enhances observability and enables upstream systems to correctly identify Prysm validator clients by their name and version. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15574)
+- Fixes [#15435](https://github.com/OffchainLabs/prysm/issues/15435). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15574)
+- Data columns syncing for Fusaka. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15564)
+- Added specification references which map spec to implementation. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15592)
+- Warm data columns storage cache at start. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15629)
+- Add `--data-column-path` flag. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15629)
+- Initialize package for SSZ Query Language. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15588)
+- In FetchDataColumnSidecars, after retrieving sidecars from peers, if still some sidecars are missing for a given root and if a reconstruction is possible (combining sidecars already retrieved from peers and sidecars in the storage), then reconstruct missing sidecars instead of trying to fetch the missing ones from peers. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15593)
+- Fulu block proposal changes for beacon api and gRPC. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15628)
+- Retry to fetch origin data column sidecars when starting from a checkpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15634)
+- Aggregate and pack sync committee messages into blocks. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15608)
+- Support `List` type for SSZ-QL. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15637)
+- Configured the beacon node to seek peers when we have validator custody requirements. If one or more validators are connected to the beacon node, then the beacon node should seek a diverse set of peers such that broadcasting to all data column subnets for a block proposal is more efficient. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15654)
+- SSZ-QL: Add element information for `Vector` type. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15668)
+- SSZ-QL: Support multi-dimensional tag parsing. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15668)
+- Added more metadata for debug logs when initial sync requests fail for "invalid data returned from peer" errors. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15674)
+- Adding Fulu types for web3signer. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15498)
+- Added erigon/caplin to known p2p agent strings. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15678)
+- Add Fulu fork transition tests for mainnet and minimal configurations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15666)
+- Fulu proposer lookahead epoch processing tests for mainnet and minimal configurations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15667)
+- Populate sszInfo of variable-length fields in AnalyzeObjects. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15676)
+- KZG proof batch verification for data column gossip validation. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15617)
+- Added flag `--p2p-colocation-whitelist` to accept CIDRs which will bypass the p2p colocation restrictions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15685)
+- Fulu spec tests coverage for covering the general package. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15682)
+- Implemented syncing in a disjoint network with respect to data column sidecars subscribed by peers. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15644)
+- Add retry logic when GetBlobsV2 is called. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15520)
+- Call GetBlobsV2 as soon as we receive the first data column sidecar or block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15520)
+- Added new post fulu /eth/v1/beacon/blobs/{block_id} endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15610)
+- SSZ-QL: Handle `Bitlist` and `Bitvector` types. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15704)
+- Adding `/eth/v1/debug/beacon/data_column_sidecars/{block_id}` endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15701)
+- Support Fulu genesis block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15652)
+- Update spectests to 1.6.0-beta.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15741)
+
+### Changed
+
+- `parseIndices`: Return `[]int` instead of `[]uint64`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15386)
+- Reclaim memory manually in some tests that fuzz the beacon state. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15395)
+- when REST api is enabled the get Block api defaults to requesting and receiving SSZ instead of JSON, JSON is the fallback. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15390)
+- Remove "invalid" from logs for incoming blob sidecar that is missing parent or out of range slot. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15428)
+- In `TopicFromMessage`: Do not assume anymore that all Fulu specific topic are V3 only. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15423)
+- `readChunkedDataColumnSidecar`: Add `validationFunctions` parameter and add tests. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15423)
+- Put the initiation of LC Store behind the `enable-light-client` flag. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15464)
+- default batch signature verification limit increased from 50 to 1000. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15467)
+- Increase mainnet DefaultBuilderGasLimit from 36M to 45M. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15455)
+- Attest timely is now default. `attest-timely` flag is now deprecated. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15410)
+- Move data col reconstruction log to a more accurate place in the code. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15475)
+- Makes the multivalue slice permanent in the state and removes old paths. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15414)
+- Previously, we optimistically believed the beacon node was healthy and tried to get chain start, but now we do a health check at the start. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15401)
+- Optimize proposer inclusion proof calcuation by pre caching subtries. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15473)
+- Move setter/getter functions for LC Bootstrap into LcStore for a unified interface. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15476)
+- Changed `enable-duties-v2` to `disable-duties-v2` to default to using duties v2. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15445)
+- Changed `uint64` genesis time to use `time.Time`. Also did some refactoring and cleanup that was enabled by these changes. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15419)
+- Add milliseconds to log timestamps. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15496)
+- Move setter/getter functions for LC Updates into LcStore for a unified interface. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15488)
+- Change LC Bootstrap logic to only save bootstraps on finalized checkpoints instead of every block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15497)
+- Update links to consensus-specs to point to `master` branch. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15523)
+- changed from in-memory to persistent discv5 db to keep local node information persistent for the key to keep the ENR sequence number deterministic when restarting. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15519)
+- Fix some nits associated with data column sidecar verification. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15521)
+- Include state root in StateNotFoundError for better debugging of consensus validation failures. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15533)
+- when shutting down the sync service we now send p2p goodbye messages in parallel to maxmimize changes of propogating goodbyes to all peers before an unsafe shutdown. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15542)
+- Do not compare liveness response with LH in e2e Beacon API evaluator. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15556)
+- Moved the broadcast and event notifier logic for saving LC updates to the store function. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15540)
+- Fixed the issue with broadcasting more than twice per LC Finality update, and the if-case bug. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15540)
+- Separated the finality update validation rules for saving and broadcasting. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15540)
+- Update validator custody to the latest specification, including the new status message. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15532)
+- Beacon api optimize validator lookup for large batch request size. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15558)
+- Check pending block is in forkchoice before importing pending attestation. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15547)
+- Redesign the pending attestation queue. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15024)
+- Replaced hardcoded `grpc-gateway-port` with `flags.HTTPServerPort.Name` in `testing/endtoend/components/validator.go`, resolving an inline TODO for improved flag consistency. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15236)
+- Refactor `htrutil.go` by removing redundant codes. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15453)
+- Improved sync unaggregated attestation cache key outside of lock path. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15572)
+- Move aggregated attestation cache key generation outside of critical locks to improve performance. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15579)
+- Renamed various variables/functions to be more clear. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15529)
+- Update consensus spec to v1.6.0-alpha.4 and implement data column support for forkchoice spectests. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15590)
+- Reject incoming connections when the fork schedule of the connecting peer (parsed from their ENR) has a matching next_fork_epoch, but mismatched next_fork_version or nfd (next fork digest). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15604)
+- Update gohashtree to v0.0.5-beta. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15619)
+- Updated consensus spec from v1.6.0-alpha.4 to v1.6.0-alpha.5 with adjusted minimal config parameters. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15621)
+- Changed old atomic functions to new atomic.Int for safer and clearer code. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15625)
+- Start from justified checkpoint by default. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15636)
+- Updated consensus spec from v1.6.0-alpha.5 to v1.6.0-alpha.6. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15658)
+- Updated outdated documentation links for Web3Signer and Why Bazel. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15631)
+- changed validatorpb.SignRequest_AggregateAttestationAndProof signing type to use AggregateAttestationAndProofV2 on web3signer. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15498)
+- Pre-calculate exit epoch, churn and active balance before processing slashings to reduce CPU load. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14990)
+- Switching default of validator client rest call for submit block from JSON to SSZ. Fallback json will be attempted. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15645)
+- Deprecated and added error to /prysm/v1/beacon/blobs endpoint for post Fulu fork. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15643)
+- Upgraded gossipsub to v0.14.2 and libp2p to v0.39.1. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15677)
+- Prysm will now downscore peers that return invalid block_by_range responses. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15686)
+- Filtering peers for data column subnets: Added a one-epoch slack to the peer’s head slot view. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15644)
+- Fetching data column sidecars: If not all requested sidecars are available for a given root, return the successfully retrieved ones along with a map indicating which could not be fetched. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15644)
+- Fetching origin data column sidecars: If only some sidecars are fetched, save the retrieved ones and retry fetching the missing ones on the next attempt. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15644)
+- Renamed the `--enable-experimental-backfill` flag to `--enable-backfill` to signal that it is more mature. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15690)
+- Restrict best LC update collection to canonical blocks. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15585)
+- PeerDAS: Wait for a random delay, then reconstruct data column sidecars and immediately reseed instead of immediately reconstructing, waiting and then reseeding. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15705)
+- Clarified misleading log messages in beacon-chain/rpc/service gRPC module. [[PR]](https://github.com/prysmaticlabs/prysm/pull/13063)
+- Broadcast block then sidecars, instead block and sidecars concurrently. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15720)
+- Broadcast and receive sidecars in concurrently, instead sequentially. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15720)
+- Changed blst dependency from `http_archive` to `go_repository` so that gazelle can keep it in sync with go.mod. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15709)
+- Updated go to v1.25.1. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15641)
+- Updated rules_go to v0.57.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15641)
+- Updated protobuf to 28.3. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15641)
+- Set Fulu fork epochs for Holesky, Hoodi, and Sepolia testnets. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15721)
+- Improve logging of data column sidecars. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15728)
+- Updated go.mod to v1.25.1. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15740)
+
+### Deprecated
+
+- Deprecated `p2p-metadata` flag. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15554)
+
+### Removed
+
+- Removed //tools/eth1voting tool. This is no longer needed as the beacon chain no longer uses eth1data voting since Electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15415)
+- Remove deposit count from sync new block log. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15420)
+- Unused `DataColumnIdentifier` proto message. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15423)
+- Validator client will no longer need to call the canonical head api. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15480)
+- Partially reverting pr #15390 removing the `ssz-only` debug flag until there is a real usecase for the flag. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15433)
+
+### Fixed
+
+- Added regression test for [PR 15369](https://github.com/OffchainLabs/prysm/pull/15369). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15379)
+- Added missing `meta` field to the response of the endpoint `/eth/v1/node/peers` to align with the Beacon API spec (#15370). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15371)
+- Fix blob metric name for peer count. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15412)
+- Non deterministic output order of `dataColumnSidecarByRootRPCHandler`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15441)
+- Fixed the versioning bug for light client data types in the Beacon API. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15400)
+- `--chain-config-file`: Do not use any more mainnet boot nodes. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15460)
+- Fix panic on dutiesv2 when there is no committee assignment on the epoch. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15466)
+- Allow SSZ requests for pending deposits, partial withdrawals and consolidations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15474)
+- Validator client shuts down cleanly on error instead of fatal error. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15401)
+- Fixes edge case starting validator client with new validator keys starts the slot ticker too early resulting in replayed slots in the main runner loop. Fixes edge case of replayed slots when waiting for account acivations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15479)
+- DV aggregations failing first slot of the epoch. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15156)
+- Skip genesis block retrieval when EIP-6110 deposit requests have started to prevent "pruned history unavailable" errors with execution clients that have pruned pre-merge data. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15494)
+- Fixed lookahead initialization at the fulu fork. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15450)
+- Write `Content-Encoding` header in the response properly when gzip encoding is requested. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15499)
+- Subnets subscription: Avoid dynamic subscribing blocking in case not enough peers per subnets are found. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15471)
+- Do not apply the gzip middleware to the event stream API. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15517)
+- Fixed various reasons why a node is banned by its peers when it stops. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15505)
+- Use `MinEpochsForDataColumnSidecarsRequest` in `WithinDAPeriod` when in Fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15522)
+- Return zero value for `Eth-Consensus-Block-Value` on error to avoid missed block proposals. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15526)
+- Moved reconstruction lock to prevent unnecessary work. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15528)
+- Fixed variable names, links, and typos in das core code. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15524)
+- Fix builder bid version compatibility to support Electra bids with Fulu blocks. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15536)
+- Fixed align submitPoolSyncCommitteeSignatures response with Beacon API specification. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15516)
+- Trigger payload attribute event as soon as an early block is processed. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15541)
+- Beacon-api proposer duty fulu computation. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15534)
+- Fixed the max proofs in `BlobsBundleV2`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15530)
+- Prevent a race on double `ReceiveBlock`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15565)
+- Fixed [#15544](https://github.com/OffchainLabs/prysm/issues/15544): Persist metadata sequence number if it is needed (e.g., use static peer ID option or Fulu enabled). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15554)
+- Fix the validateConsensus endpoint handler. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15548)
+- builder version check was using head block version instead of current fork's version based on slot, fixes e2e from https://github.com/OffchainLabs/prysm/commit/57e27199bdb9b3ef1af14c3374999aba5e0788a3. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15568)
+- Don't submit duplicate `SignedContributionAndProof` messages. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15571)
+- Genesis state, timestamp and validators root now ubiquitously available at node startup, supporting tech debt cleanup. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15470)
+- Fixed a condition where the blob cache could panic when there were less than or no sidecars in the cache entry. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15581)
+- Fixed endpoint response to return 404 or 400 after isOptimistic check. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15559)
+- Safeguard against accidental out of bounds array access in dataColumnSidecars method. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15586)
+- Fixed NewSignedBeaconBlock calls to use Block field for proper equivocation handling. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15595)
+- Fixed regression in find peer functions introduced in PR#15471, where nodes with equal sequence numbers were incorrectly skipped and the peer count was incorrectly reduced when replacing nodes with higher sequence numbers. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15578)
+- Fix bug where stale computed value in closure excludes newly required (eg attestation) subscriptions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15603)
+- Fix bug where arguments of fillInForkChoiceMissingBlocks were incorrectly placed. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15639)
+- Fix next epoch proposer duties in Fulu by advancing the state to the beginning of the current epoch. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15642)
+- Fix getBlockAttestationsV2 to return [] instead of null when data is empty. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15651)
+- Fixed the issue of empty dirs not being deleted when using –blob-storage-layout=by-epoch. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15573)
+- Start topic-based peer discovery before initial sync completes so that we have coverage of needed columns when range syncing. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15660)
+- Fixed an off-by-one in forkchoice startup. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15684)
+- mitigate potential supernode clustering due to libp2p ConnManager pruning of non-supernodes, see https://github.com/OffchainLabs/prysm/issues/15607. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15681)
+- Initial sync: Do not request data column sidecars for blocks before the retention period. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15644)
+- Fixed incorrect attestation data request where the assigned committee index was used after Electra, instead of 0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15696)
+- Use v2 endpoint for blinded block submission post-Fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15716)
+- Fixed 'justified' block support missing on blocker.Block and optimized logic between blocker.Block and blocker.Blob. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15715)
+- Fix prysmctl panic when baseFee is not set in genesis.json. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15687)
+- Fix getStateRandao not returning historic RANDAO mix values. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15653)
+- fix race in PriorityQueue.Pop by checking emptiness under write lock. (#15726). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15726)
+- In P2P service start, wait for the custody info to be correctly initialized. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15732)
+- `createLocalNode`: Wait before retrying to retrieve the custody group count if not present. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15735)
+- Replace fmt.Printf with proper test error handling in web3signer keymanager tests, using require.NoError(t, err) instead of t.Fatalf for better error handling and debugging. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15723)
+- fixed regression introduced in PR #15715 , blocker now returns an error for not found, and error handling correctly handles error and returns 404 instead of 500. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15742)
+- da metric was not writing correctly because if statement on err was accidently flipped. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15743)
+
+### Security
+
+- Updated go to version 1.24.5. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15561)
+- Updated distroless/cc-debian11 to latest to resolve CVE-2024-2961. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15562)
+- Updated go to version 1.24.6. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15566)
+- Updated quic-go to latest version. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15749)
+
+
+## [v6.0.5](https://github.com/prysmaticlabs/prysm/compare/v6.0.4...v6.0.5) - 2025-09-26
+
+We are releasing a patch update on top of v6.0.4 to address a stability issue with quic-go. 
+All operators should update as soon as possible to v6.0.5 or later.
+
+### Security
+
+- Updated quic-go to latest version. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15749)
+
+## [v6.0.4](https://github.com/prysmaticlabs/prysm/compare/v6.0.3...v6.0.4) - 2025-06-05
+
+This release has more work on PeerDAS, and light client support. Additionally, we have a few bug fixes:
+- Blob cache size now correctly set at startup.
+- A fix for slashing protection history exports where the validator database was in a nested folder.
+- Corrected behavior of the API call for state committees with an invalid request.
+- `/bin/sh` is now symlinked to `/bin/bash` for Prysm docker images.
+
+In the [Hoodi](https://github.com/eth-clients/hoodi) testnet, the default gas limit is raised to 60M gas. 
+
+### Added
+
+- Add light client mainnet spec test. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15295)
+- Add support for light client req/resp domain. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15281)
+- Added /bin/sh simlink to docker images. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15294)
+- Added Prysm build data to otel tracing spans. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15302)
+- Add light client minimal spec test support for `update_ranking` tests. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15297)
+- Add fulu operation and epoch processing spec tests. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15284)
+- Updated e2e Beacon API evaluator to support more endpoints, including the ones introduced in Electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15304)
+- Data column sidecars verification methods. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15232)
+- Implement data column sidecars filesystem. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15257)
+- Add blob schedule support from https://github.com/ethereum/consensus-specs/pull/4277. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15272)
+-  random forkchoice spec tests for fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15287)
+- Add ability to download nightly test vectors. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15312)
+- PeerDAS: Validation pipeline for data column sidecars received via gossip. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15310)
+- PeerDAS: Implement P2P. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15347)
+- PeerDAS: Implement the blockchain package. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15350)
+
+### Changed
+
+- Update spec tests to v1.6.0-alpha.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15306)
+- PeerDAS: Refactor the reconstruction pipeline. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15309)
+- PeerDAS: `DataColumnStorage.Get` - Exit early no columns are available. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15309)
+- Default hoodi testnet builder gas limit to 60M. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15361)
+
+### Fixed
+
+- Fix cyclical dependencies issue when using testing/util package. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15248)
+- Set seen blob cache size correctly based on current slot time at start up. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15348)
+- Fix `slashing-protection-history export` failing when `validator.db` is in a nested folder like `data/direct/`. (#14954). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15351)
+- Made `/eth/v1/beacon/states/{state_id}/committees` endpoint return `400` when slot does not belong to the specified epoch, aligning with the Beacon API spec (#15355). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15356)
+- Removed eager validator context cancellation that was causing validator builder registrations to fail occasionally. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15369)
+
+## [v6.0.3](https://github.com/prysmaticlabs/prysm/compare/v6.0.2...v6.0.3) - 2025-05-21
+
+This release has important bugfixes for users of the [Beacon API](https://ethereum.github.io/beacon-APIs/). These fixes include:
+- Fixed pending consolidations endpoint to return the correct response.
+- Fixed incorrect field name from pending partial withdrawals response.
+- Fixed attester slashing to return an empty array instead of nil/null. 
+- Fixed validator participation and active set changes endpoints to accept a `{state_id}` parameter. 
+
+Other improvements include:
+- Disabled deposit log processing routine for Electra and beyond.
+
+Operators are encouraged to update at their own convenience.
+
+### Added
+
+- ssz static spec tests for fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15279)
+- finality and merkle proof spec tests for fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15286)
+- sanity and rewards spec tests for fulu. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15285)
+
+### Changed
+
+- Added more tracing spans to various helpers related to GetDuties. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15271)
+- Disable log processing after deposit requests are activated. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15274)
+
+### Fixed
+
+- fixed wrong handler for get pending consolidations endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15290)
+- Fixed /eth/v2/beacon/pool/attester_slashings no slashings returns empty array instead of nil. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15291)
+- Fix Prysm endpoints `/prysm/v1/validators/{state_id}/participation` and `/prysm/v1/validators/{state_id}/active_set_changes` to properly handle `{state_id}`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15245)
+
+## [v6.0.2](https://github.com/prysmaticlabs/prysm/compare/v6.0.1...v6.0.2) - 2025-05-12
+
+This is a patch release to fix a few important bugs. Most importantly, we have adjusted the index limit for field tries in the beacon state to better support Pectra states. This should alleviate memory issues that clients are seeing since Pectra mainnet fork.
+
+### Added
+
+- Enable light client gossip for optimistic and finality updates. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15220)
+- Implement peerDAS core functions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15192)
+- Force duties start on received blocks. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15251)
+- Added additional tracing spans for the GetDuties routine. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15258)
+
+### Changed
+
+- Use otelgrpc for tracing grpc server and client. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15237)
+- Upgraded ristretto to v2.2.0, for RISC-V support. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15170)
+- Update spec to v1.5.0 compliance which changes minimal execution requests size. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15256)
+- Increase indices limit in field trie rebuilding. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15252)
+- Increase sepolia gas limit to 60M. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15253)
+
+### Fixed
+
+- Fixed wrong field name in pending partial withdrawals was returned on state json representation, described in https://github.com/ethereum/consensus-specs/blob/dev/specs/electra/beacon-chain.md#pendingpartialwithdrawal. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15254)
+- Fixed gocognit on propose block rest path. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15147)
+
+## [v6.0.1](https://github.com/prysmaticlabs/prysm/compare/v6.0.0...v6.0.1) - 2025-05-02
+
+This release fixes two bugs related to the `payload_attributes` [event stream](https://ethereum.github.io/beacon-APIs/#/Events/eventstream). If you are using or planning to use this endpoint, upgrading to version 6.0.1 is mandatory.  
+Also, a reminder: like other Beacon API endpoints, when a node is syncing, it may return historical data as `finalized` or `head`. Until the node is fully synced to the head of the chain, you should avoid using this data, depending on your application's needs.
+
+We currently recommend against using the `--enable-beacon-rest-api` flag on Mainnet. As you may have noticed, we put a deprecation notice on our gRPC code, in particular on gRPC-related flags. The reason for this is that we want to eventually remove gRPC and have REST HTTP as the standard way of communication between the validator client and the beacon node. That being said, the REST option is still unstable and thus marked as experimental in the flag's description (the flag is `--enable-beacon-rest-api`). Therefore we encourage everyone to keep using gRPC, which is currently the default. It is fine to test the REST option on testnets, but doing it on Mainnet can lead to missing attestations and even missing blocks.
+
+**Updating to v6.0.0 or later is required for Pectra Mainnet!**
+
+This patch release has a few important fixes from v6.0.0. Updating to this release is encouraged.
+
+### Added
+
+- `UpgradeToFulu` spectests. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15190)
+- PeerDAS related KZG wrappers. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15186)
+- Add light client p2p broadcaster functions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15175)
+- Added immediate broadcasting of proposer slashings when equivocating blocks are detected during block processing. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14693)
+- Added 2 new errors: `HeadStateErr` and `ErrCouldNotVerifyBlockHeader`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14693)
+- Implement pending consolidations Beacon API endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15219)
+- PeerDAS: Add needed proto files and corresponding generated code. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15187)
+- Add light client p2p validator and subscriber functions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15214)
+
+### Changed
+
+- Refactored internal function `reValidateSubscriptions` to `pruneSubscriptions` in `beacon-chain/sync/subscriber.go` for improved clarity, addressing a TODO comment. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15160)
+- Updated geth to v1.15.9. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15216)
+- Removed the slot from `UpdateDuties`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15223)
+- Update hoodie bootnodes. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15240)
+
+### Fixed
+
+- avoid nondeterministic default fork value when generate genesis. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15151)
+- `UpgradeToFulu`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15190)
+- fixed underflow with balances in leaking edge case with expected withdrawals. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15191)
+- Fixes our generated ssz files to have the correct package name. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15199)
+- Fixes our blob sidecar by root request lists for electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15209)
+- Ensure that the `payload_attributes` event has a consistent view of the head state by passing the head block in the event and using stategen to retrieve the corresponding state. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15213)
+- Pass parent context to update duties when dependent roots change. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15221)
+- Process slots across epoch for payload attribute event. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15228)
+- extend the payload attribute computation deadline to the beginning of the proposal slot. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15230)
+
+### Security
+
+- Fix CVE-2025-22869. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15204)
+- Fix CVE-2025-22870. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15204)
+- Fix CVE-2025-22872. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15204)
+- Fix CVE-2025-30204. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15204)
+
+## [v6.0.0](https://github.com/prysmaticlabs/prysm/compare/v5.3.2...v6.0.0) - 2025-04-21
+
+This release introduces Mainnet support for the upcoming Electra + Prague (Pectra) fork. The fork is scheduled for mainnet epoch 364032 (May 7, 2025, 10:05:11 UTC). You MUST update Prysm Beacon Node, Prysm Validator Client, and your execution layer client to the Pectra ready release prior to the fork to stay on the correct chain.
+
+Besides Pectra, we have more light client API support, cleanups, and a few bugfixes. Please review the changelog below and update your client as soon as practical before May 7.
+
+This release is **mandatory** for all operators before May 7.
+
+### Added
+
+- Implemented validator identities Beacon API endpoint. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15086)
+- Add SSZ support to light client updates by range API. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15082)
+- Add light client ssz types to the spec test. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15097)
+- Added the ability for execution requests to be tested in e2e with electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14971)
+- Add warning messages for gas limit ranges that might be problematic. Low gas limits (≤10% of default) may cause transactions to fail, while high gas limits (>150% of default) could lead to block propagation issues. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15078)
+- Add light client store object to the beacon node object. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15120)
+- prysmctl option in wrapper script to generate devnet ssz. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15145)
+- Add support for Electra fork epoch. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15132)
+
+### Changed
+
+- The validator client will no longer use the full list of committee values but instead use the committee length and validator committee index. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15039)
+- Remove the header `Content-Disposition` from the `httputil.WriteSSZ` function. No `filename` parameter is needed anymore. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15092)
+- Sort attestations in proposer block by reward. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15093)
+- More efficient query method for stategen to retrieve blocks between a given state and the replay target block. This avoids attempting to look up blocks that are not needed for head replay queries, which may be missing due to a previous rollback bug. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15063)
+- removed old web3signer metrics in favor for a universal one. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14920)
+- Deprecated everything related with the gRPC API. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14944)
+- Migrate Prysm repo to Offchain Labs organization ahead of Pectra upgrade v6. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15140)
+
+### Deprecated
+
+- deprecates and removes usage of the `--trace` flag and`--cpuprofile` flag in favor of just using `--pprof`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15083)
+
+### Removed
+
+- Remove /eth/v1/beacon/states/head/committees call when getting duties. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15039)
+- Removed unused hack scripts. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15157)
+- Remove `disable-committee-aware-packing` flag. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15162)
+- Remove deprecated flags for the major release. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15165)
+- Removed Beacon API endpoints which have been deprecated at the Deneb fork. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15166)
+
+### Fixed
+
+- The `--rpc` flag will now properly enable the keymanager APIs without web. The `--web` will enable both validator api endpoints and web. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15080)
+- Use latest state to pack attestation. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15113)
+- Clean up dangling block index entries for blocks that were previously deleted by incomplete cleanup code. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15040)
+- Fixed to use io stream instead of stream read. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15089)
+- When using a DV, send all aggregations for a slot and committee. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15110)
+- Fixed a bug in consolidation request processing. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15122)
+- Fix State Getter for pending withdrawal balance. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15123)
+- Fixed a bug in checking for attestation lengths in our block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15134)
+- Fix Committee Index Check For Aggregates. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15146)
+- Fix filtering by committee index post-Electra in `ListAttestationsV2`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15148)
+- Peers giving invalid data in range syncing are now downscored. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15149)
+- Adding fork guard to attestation api endpoints so that it doesn't accidentally include wrong attestation types in the pool. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15161)
+- fixed underflow with balances in leaking edge case with expected withdrawals. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15191)
+- Attribute block and blob issues to correct peers during range syncing. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15173)
+
+## [v5.3.2](https://github.com/prysmaticlabs/prysm/compare/v5.3.1...v5.3.2) - 2025-03-25
+
+This release introduces support for the `Hoodi` testnet.
+
+Release highlights:
+
+- Ability to run the node on the `Hoodi` tesnet. See https://blog.ethereum.org/2025/03/18/hoodi-holesky for more information about `Hoodi`.
+- A new feature that allows treat certain blocks as invalid. This is especially useful when the network is split, allowing the node to discontinue following unwanted forks.
+
+Testnet operators are required to update to this release. Without this release you will be unable to run the node on the `Hoodi` testnet.
+
+Mainnet operators are recommended to update to this release at their regular cadence.
+
+### Added
+
+- enable SSZ for builder API calls. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14976)
+- Add Hoodi testnet flag `--hoodi` to specify Hoodi testnet config and bootnodes. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15057)
+- block_gossip topic support to the beacon api event stream. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15038)
+- Added a static analyzer to discourage use of panic() in Prysm. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15075)
+- Add a feature flag `--blacklist-roots` to allow the node to specify blocks that will be treated as invalid. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15030)
+
+### Changed
+
+- changed request object for `POST /eth/v1/beacon/states/head/validators` to omit the field if empty for satisfying other clients. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15031)
+- Update spec test to v1.5.0-beta.3. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15050)
+- Update Gossip and RPC message limits to comply with the spec. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14799)
+- Return 404 instead of 500 from API when when a blob for a requested index is not found. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14845)
+- Save Electra orphaned attestations into attestations pool's block attestations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15060)
+- Removed redundant string conversion in `BeaconDbStater.State` to improve code clarity and maintainability. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15081)
+
+### Fixed
+
+- Update seen unaggregated att cache to properly handle Electra attestations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15034)
+- cosmetic fix for calling `/prysm/validators/performance` when connecting to non prysm beacon nodes and removing the 404 error log. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15062)
+- Tracked validator cache: Make sure no to loose the reference. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15077)
+- Fixed proposing at genesis when starting post Bellatrix. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15084)
+
+## [v5.3.1](https://github.com/prysmaticlabs/prysm/compare/v5.3.0...v5.3.1) - 2025-03-13
+
+This release is packed with critical fixes for **Electra** and some important fixes for mainnet too. 
+
+The release highlights include:
+
+- Ensure that deleting a block from the database clears its entry in the slot->root db index. This issue was causing some operators to have a bricked database, requiring a full resync. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15011)
+- Updated go to go1.24.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- Added a feature flag to sync from an arbitrary beacon block root at startup. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15000)
+- Updated default gas limit from 30M to 36M. Override this with `--suggested-gas-limit=` in the validator client. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14858)
+
+Known issues in **Electra**:
+
+- Duplicate attestations are needlessly processed. This is being addressed in [[PR]](https://github.com/prysmaticlabs/prysm/pull/15034).
+
+Testnet operators are strongly encouraged to update to this release. There are many fixes and improvements from the Holesky upgrade incident.
+
+Mainnet operators are recommended to update to this release at their regular cadence. 
+
+### Added
+
+- enable E2E for minimal and mainnet tests. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14842)
+- enable web3signer E2E for electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14936)
+- Enable multiclient E2E for electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14946)
+- Enable Scenario E2E tests with electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14946)
+- Add endpoint for getting pending deposits. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14941)
+- Add request hash to header for builder: executable data to block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14955)
+- Log execution requests in each block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14956)
+- Add endpoint for getting pending partial withdrawals. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14949)
+- Tracked validators cache: Added the `ItemCount` method. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14957)
+- Tracked validators cache: Added the `Indices` method. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14957)
+- Added deposit request testing for electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14964)
+- Added support for otel tracing transport in HTTP clients in Prysm. This allows for tracing headers to be sent with http requests such that spans between the validator and beacon chain can be connected in the tracing graph. This change does nothing without `--enable-tracing`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14972)
+- Add SSZ support to light client finality and optimistic APIs. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14836)
+- add log to committee index when committeebits are not the expected length of 1. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14993)
+- Add acceptable address types for static peers. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14886)
+- Added a feature flag to sync from an arbitrary beacon block root at startup. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15000)
+
+### Changed
+
+- updates geth to 1.15.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14842)
+- Updates blst to v3.14.0 and fixes the references in our deps.bzl file. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14921)
+- Updated tracing exporter from jaeger to otelhttp. This should not be a breaking change. Jaeger supports otel format, however you may need to update your URL as the default otel-collector port is 4318. See the [OpenTelemtry Protocol Exporter docs](https://opentelemetry.io/docs/specs/otel/protocol/exporter/) for more details. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14928)
+- Don't use MaxCover for Electra on-chain attestations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14925)
+- Tracked validators cache: Remove validators from the cache if not seen after 1 hour. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14957)
+- execution requests errors on ssz length have been improved. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14962)
+- deprecate beacon api endpoints based on [3.0.0 release](https://github.com/ethereum/beacon-APIs/pull/506) for electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14967)
+- Use go-cmp for printing better diffs for assertions.DeepEqual. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14978)
+- Reorganized beacon chain flags in `--help` text into logical sections. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14959)
+- `--validators-registration-batch-size`: Change default value from `0` to `200`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14981)
+- Updated go to go1.24.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- Updated gosec to v2.22.1 and golangci to v1.64.5. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- Updated github.com/trailofbits/go-mutexasserts. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- Updated rules_go to cf3c3af34bd869b864f5f2b98e2f41c2b220d6c9 to support go1.24.0. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- Validate blob sidecar re-order signature and bad parent block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15013)
+- Updated default gas limit from 30M to 36M. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14858)
+- Ignore errors from `hasSeenBit` and don't pack unaggregated attestations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15018)
+
+### Removed
+
+- Remove Fulu state and block. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14905)
+- Removed the log summarizing all started services. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14958)
+
+### Fixed
+
+- fixed max and target blob per block from static to dynamic values. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14911)
+- refactored publish block and block ssz functions to fix gocognit. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14913)
+- refactored publish blinded block and blinded block ssz to correctly deal with version headers and sent blocks. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14913)
+- Only check for electra related engine methods if electra is active. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14924)
+- Fixed bug that breaks new blob storage layout code on Windows, caused by accidental use of platform-dependent path parsing package. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14931)
+- Fix E2E Process Deposit Evaluator for Electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14933)
+- Fixed the `bazel run //:gazelle` command in `DEPENDENCIES.md`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14934)
+- Fix E2E Deposit Activation Evaluator for Electra. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14938)
+- Dedicated processing of `SingleAttestation` in the monitor service. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14965)
+- adding in content type and accept headers for builder API call on registration. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14961)
+- fixed gocognit in block conversions between json and proto types. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14953)
+- Lint: Fix violations of S1009: should omit nil check; len() for nil slices is defined as zero. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14973)
+- Lint: Fix violations of non-constant format string in call. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14974)
+- Fixed violations of gosec G301. This is a check that created files and directories have file permissions 0750 and 0600 respectively. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14980)
+- Check for the correct attester slashing type during gossip validation. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14985)
+- cosmetic fix for post electra validator logs displaying attestation committee information correctly. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14992)
+- fix inserting the wrong committee index into the seen cache for electra attestations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14998)
+- Allow any block type to be unmarshaled rather than only phase0 blocks in `slotByBlockRoot`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15008)
+- Fixed pruner to not block while pruning large database by introducing batchSize. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14929)
+- Decompose Electra block attestations to prevent redundant packing. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14896)
+- Fixed use of deprecated rand.Seed. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- Fixed build issue with SszGen where the go binary was not present in the $PATH. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14969)
+- fixed /eth/v1/config/spec displays BLOB_SIDECAR_SUBNET_COUNT,BLOB_SIDECAR_SUBNET_COUNT_ELECTRA. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15016)
+- Ensure that deleting a block from the database clears its entry in the slot->root db index. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15011)
+- Broadcasting BLS to execution changes should not use the request context in a go routine. Use context.Background() for the broadcasting go routine. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15019)
+- /eth/v1/validator/sync_committee_contribution should check for optimistic status and return a 503 if it's optimistic. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15022)
+- Fixes printing superfluous response.WriteHeader call from error in builder. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15025)
+- Fixes e2e run with builder having wrong gaslimit header due to not being set on eth1 nodes. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15025)
+- Fixed a bug in the event stream handler when processing payload attribute events where the timestamp and slot of the event would be based on the head rather than the current slot. [[PR]](https://github.com/prysmaticlabs/prysm/pull/14963)
+- Handle unaggregated attestations when decomposing Electra block attestations. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15027)
+
 ## [v5.3.0](https://github.com/prysmaticlabs/prysm/compare/v5.2.0...v5.3.0) - 2025-02-12
 
 This release includes support for Pectra activation in the [Holesky](https://github.com/eth-clients/holesky) and [Sepolia](https://github.com/eth-clients/sepolia) testnets! The release contains many fixes for Electra that have been found in rigorous testing through devnets in the last few months.
@@ -2657,7 +3294,7 @@ There are two known issues with this release:
 
 ### Added
 
-- Web3Signer support. See the [documentation](https://docs.prylabs.network/docs/next/wallet/web3signer) for more
+- Web3Signer support. See the [documentation](https://prysm.offchainlabs.com/docs/manage-wallet/web3signer/) for more
   details.
 - Bellatrix support. See [kiln testnet instructions](https://hackmd.io/OqIoTiQvS9KOIataIFksBQ?view)
 - Weak subjectivity sync / checkpoint sync. This is an experimental feature and may have unintended side effects for

CONTRIBUTING.md

@@ -4,7 +4,7 @@ Note: The latest and most up-to-date documentation can be found on our [docs por
 
 Excited by our work and want to get involved in building out our sharding releases? Or maybe you haven't learned as much about the Ethereum protocol but are a savvy developer? 
 
-You can explore our [Open Issues](https://github.com/prysmaticlabs/prysm/issues) in-the works for our different releases. Feel free to fork our repo and start creating PR’s after assigning yourself to an issue of interest. We are always chatting on [Discord](https://discord.gg/CTYGPUJ) drop us a line there if you want to get more involved or have any questions on our implementation!
+You can explore our [Open Issues](https://github.com/OffchainLabs/prysm/issues) in-the works for our different releases. Feel free to fork our repo and start creating PR’s after assigning yourself to an issue of interest. We are always chatting on [Discord](https://discord.gg/prysm) drop us a line there if you want to get more involved or have any questions on our implementation!
 
 > [!IMPORTANT] 
 > Please, **do not send pull requests for trivial changes**, such as typos, these will be rejected. These types of pull requests incur a cost to reviewers and do not provide much value to the project. If you are unsure, please open an issue first to discuss the change.
@@ -15,15 +15,15 @@ You can explore our [Open Issues](https://github.com/prysmaticlabs/prysm/issues)
 
 **2. Fork the Prysm repo.**
 
-Sign in to your GitHub account or create a new account if you do not have one already. Then navigate your browser to https://github.com/prysmaticlabs/prysm/. In the upper right hand corner of the page, click “fork”. This will create a copy of the Prysm repo in your account.
+Sign in to your GitHub account or create a new account if you do not have one already. Then navigate your browser to https://github.com/OffchainLabs/prysm/. In the upper right hand corner of the page, click “fork”. This will create a copy of the Prysm repo in your account.
 
 **3. Create a local clone of Prysm.**
 
 ```
-$ mkdir -p $GOPATH/src/github.com/prysmaticlabs
-$ cd $GOPATH/src/github.com/prysmaticlabs
-$ git clone https://github.com/prysmaticlabs/prysm.git
-$ cd $GOPATH/src/github.com/prysmaticlabs/prysm
+$ mkdir -p $GOPATH/src/github.com/OffchainLabs
+$ cd $GOPATH/src/github.com/OffchainLabs
+$ git clone https://github.com/OffchainLabs/prysm.git
+$ cd $GOPATH/src/github.com/OffchainLabs/prysm
 ```
 
 **4. Link your local clone to the fork on your GitHub repo.**
@@ -35,13 +35,13 @@ $ git remote add myprysmrepo https://github.com/<your_github_user_name>/prysm.gi
 **5. Link your local clone to the Prysmatic Labs repo so that you can easily fetch future changes to the Prysmatic Labs repo.**
 
 ```
-$ git remote add prysm https://github.com/prysmaticlabs/prysm.git
+$ git remote add prysm https://github.com/OffchainLabs/prysm.git
 $ git remote -v (you should see myrepo and prysm in the list of remotes)
 ```
 
 **6. Find an issue to work on.**
 
-Check out open issues at https://github.com/prysmaticlabs/prysm/issues and pick one. Leave a comment to let the development team know that you would like to work on it. Or examine the code for areas that can be improved and leave a comment to the development team to ask if they would like you to work on it.
+Check out open issues at https://github.com/OffchainLabs/prysm/issues and pick one. Leave a comment to let the development team know that you would like to work on it. Or examine the code for areas that can be improved and leave a comment to the development team to ask if they would like you to work on it.
 
 **7. Create a local branch with a name that clearly identifies what you will be working on.**
 
@@ -129,7 +129,7 @@ All PRs must must include a changelog fragment file in the `changelog` directory
 
 **17. Create a pull request.**
 
-Navigate your browser to https://github.com/prysmaticlabs/prysm and click on the new pull request button. In the “base” box on the left, leave the default selection “base develop”, the branch that you want your changes to be applied to. In the “compare” box on the right, select feature-in-progress-branch, the branch containing the changes you want to apply. You will then be asked to answer a few questions about your pull request. After you complete the questionnaire, the pull request will appear in the list of pull requests at https://github.com/prysmaticlabs/prysm/pulls. Ensure that you have added an entry to CHANGELOG.md if your PR is a user-facing change. See the [Maintaining CHANGELOG.md](#maintaining-changelogmd) section for more information.
+Navigate your browser to https://github.com/OffchainLabs/prysm and click on the new pull request button. In the “base” box on the left, leave the default selection “base develop”, the branch that you want your changes to be applied to. In the “compare” box on the right, select feature-in-progress-branch, the branch containing the changes you want to apply. You will then be asked to answer a few questions about your pull request. After you complete the questionnaire, the pull request will appear in the list of pull requests at https://github.com/OffchainLabs/prysm/pulls. Ensure that you have added an entry to CHANGELOG.md if your PR is a user-facing change. See the [Maintaining CHANGELOG.md](#maintaining-changelogmd) section for more information.
 
 **18. Respond to comments by Core Contributors.**
 

DEPENDENCIES.md

@@ -2,7 +2,7 @@
 
 Prysm is go project with many complicated dependencies, including some c++ based libraries. There
 are two parts to Prysm's dependency management. Go modules and bazel managed dependencies. Be sure 
-to read [Why Bazel?](https://github.com/prysmaticlabs/documentation/issues/138) to fully
+to read [Why Bazel?](https://prysm.offchainlabs.com/docs/install-prysm/install-with-bazel/#why-bazel) to fully
 understand the reasoning behind an additional layer of build tooling via Bazel rather than a pure
 "go build" project.
 
@@ -60,7 +60,7 @@ bazel build //beacon-chain --config=release
 Example:
 
 ```bash
-go get github.com/prysmaticlabs/example@v1.2.3
+go get github.com/OffchainLabs/example@v1.2.3
 bazel run //:gazelle -- update-repos -from_file=go.mod -to_macro=deps.bzl%prysm_deps -prune=true
 ```
 

INTEROP.md

@@ -10,7 +10,7 @@ This README details how to setup Prysm for interop testing for usage with other
 ## Installation & Setup
 
 1. Install [Bazel](https://docs.bazel.build/versions/master/install.html) **(Recommended)**
-2. `git clone https://github.com/prysmaticlabs/prysm && cd prysm`
+2. `git clone https://github.com/OffchainLabs/prysm && cd prysm`
 3. `bazel build //cmd/...`
 
 ## Starting from Genesis

README.md

@@ -1,37 +1,68 @@
-# Prysm: An Ethereum Consensus Implementation Written in Go
+<h1 align="left">Prysm: An Ethereum Consensus Implementation Written in Go</h1>
 
+<div align="left">
+  
 [![Build status](https://badge.buildkite.com/b555891daf3614bae4284dcf365b2340cefc0089839526f096.svg?branch=master)](https://buildkite.com/prysmatic-labs/prysm)
-[![Go Report Card](https://goreportcard.com/badge/github.com/prysmaticlabs/prysm)](https://goreportcard.com/report/github.com/prysmaticlabs/prysm)
+[![Go Report Card](https://goreportcard.com/badge/github.com/OffchainLabs/prysm)](https://goreportcard.com/report/github.com/OffchainLabs/prysm)
 [![Consensus_Spec_Version 1.4.0](https://img.shields.io/badge/Consensus%20Spec%20Version-v1.4.0-blue.svg)](https://github.com/ethereum/consensus-specs/tree/v1.4.0)
 [![Execution_API_Version 1.0.0-beta.2](https://img.shields.io/badge/Execution%20API%20Version-v1.0.0.beta.2-blue.svg)](https://github.com/ethereum/execution-apis/tree/v1.0.0-beta.2/src/engine)
-[![Discord](https://user-images.githubusercontent.com/7288322/34471967-1df7808a-efbb-11e7-9088-ed0b04151291.png)](https://discord.gg/prysmaticlabs)
-[![GitPOAP Badge](https://public-api.gitpoap.io/v1/repo/prysmaticlabs/prysm/badge)](https://www.gitpoap.io/gh/prysmaticlabs/prysm)
+[![Discord](https://user-images.githubusercontent.com/7288322/34471967-1df7808a-efbb-11e7-9088-ed0b04151291.png)](https://discord.gg/prysm)
+[![GitPOAP Badge](https://public-api.gitpoap.io/v1/repo/OffchainLabs/prysm/badge)](https://www.gitpoap.io/gh/OffchainLabs/prysm)
 
-This is the core repository for Prysm, a [Golang](https://golang.org/) implementation of the [Ethereum Consensus](https://ethereum.org/en/developers/docs/consensus-mechanisms/#proof-of-stake) [specification](https://github.com/ethereum/consensus-specs), developed by [Offchain Labs](https://www.offchainlabs.com). See the [Changelog](https://github.com/prysmaticlabs/prysm/releases) for details of the latest releases and upcoming breaking changes.
+</div>
 
-### Getting Started
+---
 
-A detailed set of installation and usage instructions as well as breakdowns of each individual component are available in the [official documentation portal](https://docs.prylabs.network). If you still have questions, feel free to stop by our [Discord](https://discord.gg/prysmaticlabs).
+## 📖 Overview
 
-### Staking on Mainnet
+This is the core repository for Prysm, a [Golang](https://golang.org/) implementation of the [Ethereum Consensus](https://ethereum.org/en/developers/docs/consensus-mechanisms/#proof-of-stake) [specification](https://github.com/ethereum/consensus-specs), developed by [Offchain Labs](https://www.offchainlabs.com).
 
-To participate in staking, you can join the [official eth2 launchpad](https://launchpad.ethereum.org). The launchpad is the only recommended way to become a validator on mainnet. You can explore validator rewards/penalties via Bitfly's block explorer: [beaconcha.in](https://beaconcha.in), and follow the latest blocks added to the chain on [beaconscan](https://beaconscan.com).
+See the [Changelog](https://github.com/OffchainLabs/prysm/releases) for details of the latest releases and upcoming breaking changes.
 
+---
+
+## 🚀 Getting Started
+
+A detailed set of installation and usage instructions as well as breakdowns of each individual component are available in the **[official documentation portal](https://docs.prylabs.network)**.
+
+💬 **Need help?** Join our **[Discord Community](https://discord.gg/prysm)** for support.
+
+---
+
+## 🏆 Staking on Mainnet
+
+To participate in staking, you can join the **[official Ethereum launchpad](https://launchpad.ethereum.org)**. The launchpad is the **only recommended** way to become a validator on mainnet.
+
+🔍 Explore validator rewards/penalties:
+
+- **[beaconcha.in](https://beaconcha.in)**
+- **[beaconscan](https://beaconscan.com)**
+
+---
+
+## 🤝 Contributing
+
+### 🔥 Branches
 
-## Contributing
-### Branches
 Prysm maintains two permanent branches:
 
-* [master](https://github.com/prysmaticlabs/prysm/tree/master): This points to the latest stable release. It is ideal for most users.
-* [develop](https://github.com/prysmaticlabs/prysm/tree/develop): This is used for development, it contains the latest PRs. Developers should base their PRs on this branch.
+- **[`master`](https://github.com/OffchainLabs/prysm/tree/master)** - This points to the latest stable release. It is ideal for most users.
+- **[`develop`](https://github.com/OffchainLabs/prysm/tree/develop)** - This is used for development and contains the latest PRs. Developers should base their PRs on this branch.
 
-### Guide
-Want to get involved? Check out our [Contribution Guide](https://docs.prylabs.network/docs/contribute/contribution-guidelines/) to learn more!
+### 🛠 Contribution Guide
 
-## License
+Want to get involved? Check out our **[Contribution Guide](https://docs.prylabs.network/docs/contribute/contribution-guidelines/)** to learn more!
 
-[GNU General Public License v3.0](https://www.gnu.org/licenses/gpl-3.0.en.html)
+---
 
-## Legal Disclaimer
+## 📜 License
 
-[Terms of Use](/TERMS_OF_SERVICE.md)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0.en.html)  
+
+This project is licensed under the **GNU General Public License v3.0**.
+
+---
+
+## ⚖️ Legal Disclaimer
+
+📜 [Terms of Use](/TERMS_OF_SERVICE.md)

SECURITY.md

@@ -2,10 +2,10 @@
 
 ## Supported Versions
 
-[Releases](https://github.com/prysmaticlabs/prysm/releases/) contains all available releases. We recommend using the [most recently released version](https://github.com/prysmaticlabs/prysm/releases/latest).
+[Releases](https://github.com/OffchainLabs/prysm/releases/) contains all available releases. We recommend using the [most recently released version](https://github.com/OffchainLabs/prysm/releases/latest).
 
 ## Reporting a Vulnerability
 
-Please see our signed [security.txt](https://github.com/prysmaticlabs/prysm/blob/develop/.well-known/security.txt) for preferred encryption and reporting destination.
+Please see our signed [security.txt](https://github.com/OffchainLabs/prysm/blob/develop/.well-known/security.txt) for preferred encryption and reporting destination.
 
 **Please do not file a public ticket** mentioning the vulnerability, as doing so could increase the likelihood of the vulnerability being used before a fix has been created, released and installed on the network.

WORKSPACE

@@ -1,7 +1,7 @@
 workspace(name = "prysm")
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "rules_pkg",
@@ -16,8 +16,6 @@ load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
 
 rules_pkg_dependencies()
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
 http_archive(
     name = "toolchains_protoc",
     sha256 = "abb1540f8a9e045422730670ebb2f25b41fa56ca5a7cf795175a110a0a68f4ad",
@@ -165,10 +163,10 @@ http_archive(
         # Expose internals of go_test for custom build transitions.
         "//third_party:io_bazel_rules_go_test.patch",
     ],
-    sha256 = "b2038e2de2cace18f032249cb4bb0048abf583a36369fa98f687af1b3f880b26",
+    sha256 = "a729c8ed2447c90fe140077689079ca0acfb7580ec41637f312d650ce9d93d96",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.48.1/rules_go-v0.48.1.zip",
-        "https://github.com/bazelbuild/rules_go/releases/download/v0.48.1/rules_go-v0.48.1.zip",
+        "https://mirror.bazel.build/github.com/bazel-contrib/rules_go/releases/download/v0.57.0/rules_go-v0.57.0.zip",
+        "https://github.com/bazel-contrib/rules_go/releases/download/v0.57.0/rules_go-v0.57.0.zip",
     ],
 )
 
@@ -192,7 +190,7 @@ load("@rules_oci//oci:pull.bzl", "oci_pull")
 # A multi-arch base image
 oci_pull(
     name = "linux_debian11_multiarch_base",  # Debian bullseye
-    digest = "sha256:b82f113425c5b5c714151aaacd8039bc141821cdcd3c65202d42bdf9c43ae60b",  # 2023-12-12
+    digest = "sha256:55a5e011b2c4246b4c51e01fcc2b452d151e03df052e357465f0392fcd59fddf",
     image = "gcr.io/prysmaticlabs/distroless/cc-debian11",
     platforms = [
         "linux/amd64",
@@ -210,7 +208,7 @@ load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_depe
 go_rules_dependencies()
 
 go_register_toolchains(
-    go_version = "1.23.5",
+    go_version = "1.25.1",
     nogo = "@//:nogo",
 )
 
@@ -255,56 +253,18 @@ filegroup(
     url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )
 
-consensus_spec_version = "v1.5.0-beta.2"
+consensus_spec_version = "v1.6.0-beta.0"
 
-bls_test_version = "v0.1.1"
+load("@prysm//tools:download_spectests.bzl", "consensus_spec_tests")
 
-http_archive(
-    name = "consensus_spec_tests_general",
-    build_file_content = """
-filegroup(
-    name = "test_data",
-    srcs = glob([
-        "**/*.ssz_snappy",
-        "**/*.yaml",
-    ]),
-    visibility = ["//visibility:public"],
-)
-    """,
-    integrity = "sha256-X/bMxbKg1clo2aFEjBoeuFq/U+BF1eQopgRP/7nI3Qg=",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
-)
-
-http_archive(
-    name = "consensus_spec_tests_minimal",
-    build_file_content = """
-filegroup(
-    name = "test_data",
-    srcs = glob([
-        "**/*.ssz_snappy",
-        "**/*.yaml",
-    ]),
-    visibility = ["//visibility:public"],
-)
-    """,
-    integrity = "sha256-WSxdri5OJGuNApW+odKle5UzToDyEOx+F3lMiqamJAg=",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
-)
-
-http_archive(
-    name = "consensus_spec_tests_mainnet",
-    build_file_content = """
-filegroup(
-    name = "test_data",
-    srcs = glob([
-        "**/*.ssz_snappy",
-        "**/*.yaml",
-    ]),
-    visibility = ["//visibility:public"],
-)
-    """,
-    integrity = "sha256-LYE8l3y/zSt4YVrehrJ3ralqtgeYNildiIp+HR6+xAI=",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
+consensus_spec_tests(
+    name = "consensus_spec_tests",
+    flavors = {
+        "general": "sha256-rT3jQp2+ZaDiO66gIQggetzqr+kGeexaLqEhbx4HDMY=",
+        "minimal": "sha256-wowwwyvd0KJLsE+oDOtPkrhZyJndJpJ0lbXYsLH6XBw=",
+        "mainnet": "sha256-4ZLrLNeO7NihZ4TuWH5V5fUhvW9Y3mAPBQDCqrfShps=",
+    },
+    version = consensus_spec_version,
 )
 
 http_archive(
@@ -318,11 +278,13 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-jvZQ90qcJMTOqMsPO7sgeEVQmewZTHcz7LVDkNqwTFQ=",
+    integrity = "sha256-sBe3Rx8zGq9IrvfgIhZQpYidGjy3mE1SiCb6/+pjLdY=",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )
 
+bls_test_version = "v0.1.1"
+
 http_archive(
     name = "bls_spec_tests",
     build_file_content = """
@@ -338,22 +300,6 @@ filegroup(
     url = "https://github.com/ethereum/bls12-381-tests/releases/download/%s/bls_tests_yaml.tar.gz" % bls_test_version,
 )
 
-http_archive(
-    name = "eth2_networks",
-    build_file_content = """
-filegroup(
-    name = "configs",
-    srcs = glob([
-        "shared/**/config.yaml",
-    ]),
-    visibility = ["//visibility:public"],
-)
-    """,
-    sha256 = "77e7e3ed65e33b7bb19d30131f4c2bb39e4dfeb188ab9ae84651c3cc7600131d",
-    strip_prefix = "eth2-networks-934c948e69205dcf2deb87e4ae6cc140c335f94d",
-    url = "https://github.com/eth-clients/eth2-networks/archive/934c948e69205dcf2deb87e4ae6cc140c335f94d.tar.gz",
-)
-
 http_archive(
     name = "holesky_testnet",
     build_file_content = """
@@ -365,9 +311,25 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 """,
-    integrity = "sha256-b7ZTT+olF+VXEJYNTV5jggNtCkt9dOejm1i2VE+zy+0=",
-    strip_prefix = "holesky-874c199423ccd180607320c38cbaca05d9a1573a",
-    url = "https://github.com/eth-clients/holesky/archive/874c199423ccd180607320c38cbaca05d9a1573a.tar.gz",  # 2024-06-18
+    integrity = "sha256-htyxg8Ln2o8eCiifFN7/hcHGZg8Ir9CPzCEx+FUnnCs=",
+    strip_prefix = "holesky-8aec65f11f0c986d6b76b2eb902420635eb9b815",
+    url = "https://github.com/eth-clients/holesky/archive/8aec65f11f0c986d6b76b2eb902420635eb9b815.tar.gz",
+)
+
+http_archive(
+    name = "mainnet",
+    build_file_content = """
+filegroup(
+    name = "configs",
+    srcs = [
+        "metadata/config.yaml",
+    ],
+    visibility = ["//visibility:public"],
+)
+""",
+    integrity = "sha256-NZr/gsQK9rBHRnznlPBiNzJpK8MPMrfUa3f+QYqn1+g=",
+    strip_prefix = "mainnet-978f1794eada6f85bee76e4d2d5959a5fb8e0cc5",
+    url = "https://github.com/eth-clients/mainnet/archive/978f1794eada6f85bee76e4d2d5959a5fb8e0cc5.tar.gz",
 )
 
 http_archive(
@@ -381,17 +343,33 @@ filegroup(
     visibility = ["//visibility:public"],
 )
 """,
-    integrity = "sha256-cY/UgpCcYEhQf7JefD65FI8tn/A+rAvKhcm2/qiVdqY=",
-    strip_prefix = "sepolia-f2c219a93c4491cee3d90c18f2f8e82aed850eab",
-    url = "https://github.com/eth-clients/sepolia/archive/f2c219a93c4491cee3d90c18f2f8e82aed850eab.tar.gz",  # 2024-09-19
+    integrity = "sha256-+UZgfvBcea0K0sbvAJZOz5ZNmxdWZYbohP38heUuc6w=",
+    strip_prefix = "sepolia-f9158732adb1a2a6440613ad2232eb50e7384c4f",
+    url = "https://github.com/eth-clients/sepolia/archive/f9158732adb1a2a6440613ad2232eb50e7384c4f.tar.gz",
+)
+
+http_archive(
+    name = "hoodi_testnet",
+    build_file_content = """
+filegroup(
+    name = "configs",
+    srcs = [
+        "metadata/config.yaml",
+    ],
+    visibility = ["//visibility:public"],
+)
+""",
+    integrity = "sha256-G+4c9c/vci1OyPrQJnQCI+ZCv/E0cWN4hrHDY3i7ns0=",
+    strip_prefix = "hoodi-b6ee51b2045a5e7fe3efac52534f75b080b049c6",
+    url = "https://github.com/eth-clients/hoodi/archive/b6ee51b2045a5e7fe3efac52534f75b080b049c6.tar.gz",
 )
 
 http_archive(
     name = "com_google_protobuf",
-    sha256 = "9bd87b8280ef720d3240514f884e56a712f2218f0d693b48050c836028940a42",
-    strip_prefix = "protobuf-25.1",
+    sha256 = "7c3ebd7aaedd86fa5dc479a0fda803f602caaf78d8aff7ce83b89e1b8ae7442a",
+    strip_prefix = "protobuf-28.3",
     urls = [
-        "https://github.com/protocolbuffers/protobuf/archive/v25.1.tar.gz",
+        "https://github.com/protocolbuffers/protobuf/archive/v28.3.tar.gz",
     ],
 )
 
@@ -431,7 +409,7 @@ gometalinter_dependencies()
 
 load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
 
-gazelle_dependencies()
+gazelle_dependencies(go_sdk = "go_sdk")
 
 load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
 

api/BUILD.bazel

@@ -7,7 +7,7 @@ go_library(
         "headers.go",
         "jwt.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api",
+    importpath = "github.com/OffchainLabs/prysm/v6/api",
     visibility = ["//visibility:public"],
     deps = [
         "//crypto/rand:go_default_library",

api/apiutil/BUILD.bazel

@@ -0,0 +1,29 @@
+load("@prysm//tools/go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "common.go",
+        "header.go",
+    ],
+    importpath = "github.com/OffchainLabs/prysm/v6/api/apiutil",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//consensus-types/primitives:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "common_test.go",
+        "header_test.go",
+    ],
+    embed = [":go_default_library"],
+    deps = [
+        "//consensus-types/primitives:go_default_library",
+        "//testing/assert:go_default_library",
+        "//testing/require:go_default_library",
+    ],
+)

api/apiutil/common.go

@@ -0,0 +1,23 @@
+package apiutil
+
+import (
+	"fmt"
+	neturl "net/url"
+	"strconv"
+
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+)
+
+// Uint64ToString is a util function that will convert uints to string
+func Uint64ToString[T uint64 | primitives.Slot | primitives.ValidatorIndex | primitives.CommitteeIndex | primitives.Epoch](val T) string {
+	return strconv.FormatUint(uint64(val), 10)
+}
+
+// BuildURL is a util function that assists with adding query parameters to the url
+func BuildURL(path string, queryParams ...neturl.Values) string {
+	if len(queryParams) == 0 {
+		return path
+	}
+
+	return fmt.Sprintf("%s?%s", path, queryParams[0].Encode())
+}

api/apiutil/common_test.go

@@ -0,0 +1,37 @@
+package apiutil
+
+import (
+	"net/url"
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+)
+
+func TestBeaconApiHelpers_TestUint64ToString(t *testing.T) {
+	const expectedResult = "1234"
+	const val = uint64(1234)
+
+	assert.Equal(t, expectedResult, Uint64ToString(val))
+	assert.Equal(t, expectedResult, Uint64ToString(primitives.Slot(val)))
+	assert.Equal(t, expectedResult, Uint64ToString(primitives.ValidatorIndex(val)))
+	assert.Equal(t, expectedResult, Uint64ToString(primitives.CommitteeIndex(val)))
+	assert.Equal(t, expectedResult, Uint64ToString(primitives.Epoch(val)))
+}
+
+func TestBuildURL_NoParams(t *testing.T) {
+	wanted := "/aaa/bbb/ccc"
+	actual := BuildURL("/aaa/bbb/ccc")
+	assert.Equal(t, wanted, actual)
+}
+
+func TestBuildURL_WithParams(t *testing.T) {
+	params := url.Values{}
+	params.Add("xxxx", "1")
+	params.Add("yyyy", "2")
+	params.Add("zzzz", "3")
+
+	wanted := "/aaa/bbb/ccc?xxxx=1&yyyy=2&zzzz=3"
+	actual := BuildURL("/aaa/bbb/ccc", params)
+	assert.Equal(t, wanted, actual)
+}

api/apiutil/header.go

@@ -0,0 +1,122 @@
+package apiutil
+
+import (
+	"mime"
+	"sort"
+	"strconv"
+	"strings"
+
+	log "github.com/sirupsen/logrus"
+)
+
+type mediaRange struct {
+	mt   string  // canonicalised media‑type, e.g. "application/json"
+	q    float64 // quality factor (0‑1)
+	raw  string  // original string – useful for logging/debugging
+	spec int     // 2=exact, 1=type/*, 0=*/*
+}
+
+func parseMediaRange(field string) (mediaRange, bool) {
+	field = strings.TrimSpace(field)
+
+	mt, params, err := mime.ParseMediaType(field)
+	if err != nil {
+		log.WithError(err).Debug("Failed to parse header field")
+		return mediaRange{}, false
+	}
+
+	r := mediaRange{mt: mt, q: 1, spec: 2, raw: field}
+
+	if qs, ok := params["q"]; ok {
+		v, err := strconv.ParseFloat(qs, 64)
+		if err != nil || v < 0 || v > 1 {
+			log.WithField("q", qs).Debug("Invalid quality factor (0‑1)")
+			return mediaRange{}, false // skip invalid entry
+		}
+		r.q = v
+	}
+
+	switch {
+	case mt == "*/*":
+		r.spec = 0
+	case strings.HasSuffix(mt, "/*"):
+		r.spec = 1
+	}
+	return r, true
+}
+
+func hasExplicitQ(r mediaRange) bool {
+	return strings.Contains(strings.ToLower(r.raw), ";q=")
+}
+
+// ParseAccept returns media ranges sorted by q (desc) then specificity.
+func ParseAccept(header string) []mediaRange {
+	if header == "" {
+		return []mediaRange{{mt: "*/*", q: 1, spec: 0, raw: "*/*"}}
+	}
+
+	var out []mediaRange
+	for _, field := range strings.Split(header, ",") {
+		if r, ok := parseMediaRange(field); ok {
+			out = append(out, r)
+		}
+	}
+
+	sort.SliceStable(out, func(i, j int) bool {
+		ei, ej := hasExplicitQ(out[i]), hasExplicitQ(out[j])
+		if ei != ej {
+			return ei // explicit beats implicit
+		}
+		if out[i].q != out[j].q {
+			return out[i].q > out[j].q
+		}
+		return out[i].spec > out[j].spec
+	})
+	return out
+}
+
+// Matches reports whether content type is acceptable per the header.
+func Matches(header, ct string) bool {
+	for _, r := range ParseAccept(header) {
+		switch {
+		case r.q == 0:
+			continue
+		case r.mt == "*/*":
+			return true
+		case strings.HasSuffix(r.mt, "/*"):
+			if strings.HasPrefix(ct, r.mt[:len(r.mt)-1]) {
+				return true
+			}
+		case r.mt == ct:
+			return true
+		}
+	}
+	return false
+}
+
+// Negotiate selects the best server type according to the header.
+// Returns the chosen type and true, or "", false when nothing matches.
+func Negotiate(header string, serverTypes []string) (string, bool) {
+	for _, r := range ParseAccept(header) {
+		if r.q == 0 {
+			continue
+		}
+		for _, s := range serverTypes {
+			if Matches(r.mt, s) {
+				return s, true
+			}
+		}
+	}
+	return "", false
+}
+
+// PrimaryAcceptMatches only checks if the first accept matches
+func PrimaryAcceptMatches(header, produced string) bool {
+	for _, r := range ParseAccept(header) {
+		if r.q == 0 {
+			continue // explicitly unacceptable – skip
+		}
+		return Matches(r.mt, produced)
+	}
+	return false
+}

api/apiutil/header_test.go

@@ -0,0 +1,174 @@
+package apiutil
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+)
+
+func TestParseAccept(t *testing.T) {
+	type want struct {
+		mt   string
+		q    float64
+		spec int
+	}
+
+	cases := []struct {
+		name   string
+		header string
+		want   []want
+	}{
+		{
+			name:   "empty header becomes */*;q=1",
+			header: "",
+			want:   []want{{mt: "*/*", q: 1, spec: 0}},
+		},
+		{
+			name:   "quality ordering then specificity",
+			header: "application/json;q=0.2, */*;q=0.1, application/xml;q=0.5, text/*;q=0.5",
+			want: []want{
+				{mt: "application/xml", q: 0.5, spec: 2},
+				{mt: "text/*", q: 0.5, spec: 1},
+				{mt: "application/json", q: 0.2, spec: 2},
+				{mt: "*/*", q: 0.1, spec: 0},
+			},
+		},
+		{
+			name:   "invalid pieces are skipped",
+			header: "text/plain; q=boom, application/json",
+			want:   []want{{mt: "application/json", q: 1, spec: 2}},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := ParseAccept(tc.header)
+			gotProjected := make([]want, len(got))
+			for i, g := range got {
+				gotProjected[i] = want{mt: g.mt, q: g.q, spec: g.spec}
+			}
+			require.DeepEqual(t, gotProjected, tc.want)
+		})
+	}
+}
+
+func TestMatches(t *testing.T) {
+	cases := []struct {
+		name    string
+		accept  string
+		ct      string
+		matches bool
+	}{
+		{"exact match", "application/json", "application/json", true},
+		{"type wildcard", "application/*;q=0.8", "application/xml", true},
+		{"global wildcard", "*/*;q=0.1", "image/png", true},
+		{"explicitly unacceptable (q=0)", "text/*;q=0", "text/plain", false},
+		{"no match", "image/png", "application/json", false},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := Matches(tc.accept, tc.ct)
+			require.Equal(t, tc.matches, got)
+		})
+	}
+}
+
+func TestNegotiate(t *testing.T) {
+	cases := []struct {
+		name        string
+		accept      string
+		serverTypes []string
+		wantType    string
+		ok          bool
+	}{
+		{
+			name:        "highest quality wins",
+			accept:      "application/json;q=0.8,application/xml;q=0.9",
+			serverTypes: []string{"application/json", "application/xml"},
+			wantType:    "application/xml",
+			ok:          true,
+		},
+		{
+			name:        "wildcard matches first server type",
+			accept:      "*/*;q=0.5",
+			serverTypes: []string{"application/octet-stream", "application/json"},
+			wantType:    "application/octet-stream",
+			ok:          true,
+		},
+		{
+			name:        "no acceptable type",
+			accept:      "image/png",
+			serverTypes: []string{"application/json"},
+			wantType:    "",
+			ok:          false,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got, ok := Negotiate(tc.accept, tc.serverTypes)
+			require.Equal(t, tc.ok, ok)
+			require.Equal(t, tc.wantType, got)
+		})
+	}
+}
+
+func TestPrimaryAcceptMatches(t *testing.T) {
+	tests := []struct {
+		name     string
+		accept   string
+		produced string
+		expect   bool
+	}{
+		{
+			name:     "prefers json",
+			accept:   "application/json;q=0.9,application/xml",
+			produced: "application/json",
+			expect:   true,
+		},
+		{
+			name:     "wildcard application beats other wildcard",
+			accept:   "application/*;q=0.2,*/*;q=0.1",
+			produced: "application/xml",
+			expect:   true,
+		},
+		{
+			name:     "json wins",
+			accept:   "application/xml;q=0.8,application/json;q=0.9",
+			produced: "application/json",
+			expect:   true,
+		},
+		{
+			name:     "json loses",
+			accept:   "application/xml;q=0.8,application/json;q=0.9,application/octet-stream;q=0.99",
+			produced: "application/json",
+			expect:   false,
+		},
+		{
+			name:     "json wins with non q option",
+			accept:   "application/xml;q=0.8,image/png,application/json;q=0.9",
+			produced: "application/json",
+			expect:   true,
+		},
+		{
+			name:     "json not primary",
+			accept:   "image/png,application/json",
+			produced: "application/json",
+			expect:   false,
+		},
+		{
+			name:     "absent header",
+			accept:   "",
+			produced: "text/plain",
+			expect:   true,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := PrimaryAcceptMatches(tc.accept, tc.produced)
+			require.Equal(t, got, tc.expect)
+		})
+	}
+}

api/client/BUILD.bazel

@@ -7,7 +7,7 @@ go_library(
         "errors.go",
         "options.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/client",
     visibility = ["//visibility:public"],
     deps = ["@com_github_pkg_errors//:go_default_library"],
 )

api/client/beacon/BUILD.bazel

@@ -5,19 +5,17 @@ go_library(
     srcs = [
         "client.go",
         "doc.go",
-        "health.go",
         "log.go",
+        "template.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/beacon",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/client/beacon",
     visibility = ["//visibility:public"],
     deps = [
         "//api/client:go_default_library",
-        "//api/client/beacon/iface:go_default_library",
         "//api/server:go_default_library",
         "//api/server/structs:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
@@ -27,15 +25,10 @@ go_library(
 
 go_test(
     name = "go_default_test",
-    srcs = [
-        "client_test.go",
-        "health_test.go",
-    ],
+    srcs = ["client_test.go"],
     embed = [":go_default_library"],
     deps = [
         "//api/client:go_default_library",
-        "//api/client/beacon/testing:go_default_library",
         "//testing/require:go_default_library",
-        "@org_uber_go_mock//gomock:go_default_library",
     ],
 )

api/client/beacon/client.go

@@ -9,19 +9,16 @@ import (
 	"net/url"
 	"path"
 	"regexp"
-	"sort"
 	"strconv"
-	"text/template"
 
+	"github.com/OffchainLabs/prysm/v6/api/client"
+	"github.com/OffchainLabs/prysm/v6/api/server"
+	"github.com/OffchainLabs/prysm/v6/api/server/structs"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api/client"
-	"github.com/prysmaticlabs/prysm/v5/api/server"
-	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v5/network/forks"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/sirupsen/logrus"
 )
 
@@ -64,23 +61,6 @@ func IdFromSlot(s primitives.Slot) StateOrBlockId {
 	return StateOrBlockId(strconv.FormatUint(uint64(s), 10))
 }
 
-// idTemplate is used to create template functions that can interpolate StateOrBlockId values.
-func idTemplate(ts string) func(StateOrBlockId) string {
-	t := template.Must(template.New("").Parse(ts))
-	f := func(id StateOrBlockId) string {
-		b := bytes.NewBuffer(nil)
-		err := t.Execute(b, struct{ Id string }{Id: string(id)})
-		if err != nil {
-			panic(fmt.Sprintf("invalid idTemplate: %s", ts))
-		}
-		return b.String()
-	}
-	// run the template to ensure that it is valid
-	// this should happen load time (using package scoped vars) to ensure runtime errors aren't possible
-	_ = f(IdGenesis)
-	return f
-}
-
 // RenderGetBlockPath formats a block id into a path for the GetBlock API endpoint.
 func RenderGetBlockPath(id StateOrBlockId) string {
 	return path.Join(getSignedBlockPath, string(id))
@@ -114,8 +94,6 @@ func (c *Client) GetBlock(ctx context.Context, blockId StateOrBlockId) ([]byte,
 	return b, nil
 }
 
-var getBlockRootTpl = idTemplate(getBlockRootPath)
-
 // GetBlockRoot retrieves the hash_tree_root of the BeaconBlock for the given block id.
 // Block identifier can be one of: "head" (canonical head in node's view), "genesis", "finalized",
 // <slot>, <hex encoded blockRoot with 0x prefix>. Variables of type StateOrBlockId are exported by this package
@@ -138,8 +116,6 @@ func (c *Client) GetBlockRoot(ctx context.Context, blockId StateOrBlockId) ([32]
 	return bytesutil.ToBytes32(rs), nil
 }
 
-var getForkTpl = idTemplate(getForkForStatePath)
-
 // GetFork queries the Beacon Node API for the Fork from the state identified by stateId.
 // Block identifier can be one of: "head" (canonical head in node's view), "genesis", "finalized",
 // <slot>, <hex encoded blockRoot with 0x prefix>. Variables of type StateOrBlockId are exported by this package
@@ -159,24 +135,6 @@ func (c *Client) GetFork(ctx context.Context, stateId StateOrBlockId) (*ethpb.Fo
 	return fr.ToConsensus()
 }
 
-// GetForkSchedule retrieve all forks, past present and future, of which this node is aware.
-func (c *Client) GetForkSchedule(ctx context.Context) (forks.OrderedSchedule, error) {
-	body, err := c.Get(ctx, getForkSchedulePath)
-	if err != nil {
-		return nil, errors.Wrap(err, "error requesting fork schedule")
-	}
-	fsr := &forkScheduleResponse{}
-	err = json.Unmarshal(body, fsr)
-	if err != nil {
-		return nil, err
-	}
-	ofs, err := fsr.OrderedForkSchedule()
-	if err != nil {
-		return nil, errors.Wrap(err, fmt.Sprintf("problem unmarshaling %s response", getForkSchedulePath))
-	}
-	return ofs, nil
-}
-
 // GetConfigSpec retrieve the current configs of the network used by the beacon node.
 func (c *Client) GetConfigSpec(ctx context.Context) (*structs.GetSpecResponse, error) {
 	body, err := c.Get(ctx, getConfigSpecPath)
@@ -326,7 +284,7 @@ func (c *Client) SubmitChangeBLStoExecution(ctx context.Context, request []*stru
 	if resp.StatusCode != http.StatusOK {
 		decoder := json.NewDecoder(resp.Body)
 		decoder.DisallowUnknownFields()
-		errorJson := &server.IndexedVerificationFailureError{}
+		errorJson := &server.IndexedErrorContainer{}
 		if err := decoder.Decode(errorJson); err != nil {
 			return errors.Wrapf(err, "failed to decode error JSON for %s", resp.Request.URL)
 		}
@@ -356,31 +314,3 @@ func (c *Client) GetBLStoExecutionChanges(ctx context.Context) (*structs.BLSToEx
 	}
 	return poolResponse, nil
 }
-
-type forkScheduleResponse struct {
-	Data []structs.Fork
-}
-
-func (fsr *forkScheduleResponse) OrderedForkSchedule() (forks.OrderedSchedule, error) {
-	ofs := make(forks.OrderedSchedule, 0)
-	for _, d := range fsr.Data {
-		epoch, err := strconv.ParseUint(d.Epoch, 10, 64)
-		if err != nil {
-			return nil, errors.Wrapf(err, "error parsing epoch %s", d.Epoch)
-		}
-		vSlice, err := hexutil.Decode(d.CurrentVersion)
-		if err != nil {
-			return nil, err
-		}
-		if len(vSlice) != 4 {
-			return nil, fmt.Errorf("got %d byte version, expected 4 bytes. version hex=%s", len(vSlice), d.CurrentVersion)
-		}
-		version := bytesutil.ToBytes4(vSlice)
-		ofs = append(ofs, forks.ForkScheduleEntry{
-			Version: version,
-			Epoch:   primitives.Epoch(epoch),
-		})
-	}
-	sort.Sort(ofs)
-	return ofs, nil
-}

api/client/beacon/client_test.go

@@ -4,8 +4,8 @@ import (
 	"net/url"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/api/client"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/api/client"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestParseNodeVersion(t *testing.T) {

api/client/beacon/health.go

@@ -1,60 +0,0 @@
-package beacon
-
-import (
-	"context"
-	"sync"
-
-	"github.com/prysmaticlabs/prysm/v5/api/client/beacon/iface"
-)
-
-type NodeHealthTracker struct {
-	isHealthy  *bool
-	healthChan chan bool
-	node       iface.HealthNode
-	sync.RWMutex
-}
-
-func NewNodeHealthTracker(node iface.HealthNode) *NodeHealthTracker {
-	return &NodeHealthTracker{
-		node:       node,
-		healthChan: make(chan bool, 1),
-	}
-}
-
-// HealthUpdates provides a read-only channel for health updates.
-func (n *NodeHealthTracker) HealthUpdates() <-chan bool {
-	return n.healthChan
-}
-
-func (n *NodeHealthTracker) IsHealthy() bool {
-	n.RLock()
-	defer n.RUnlock()
-	if n.isHealthy == nil {
-		return false
-	}
-	return *n.isHealthy
-}
-
-func (n *NodeHealthTracker) CheckHealth(ctx context.Context) bool {
-	n.Lock()
-	defer n.Unlock()
-
-	newStatus := n.node.IsHealthy(ctx)
-	if n.isHealthy == nil {
-		n.isHealthy = &newStatus
-	}
-
-	isStatusChanged := newStatus != *n.isHealthy
-	if isStatusChanged {
-		// Update the health status
-		n.isHealthy = &newStatus
-		// Send the new status to the health channel, potentially overwriting the existing value
-		select {
-		case <-n.healthChan:
-			n.healthChan <- newStatus
-		default:
-			n.healthChan <- newStatus
-		}
-	}
-	return newStatus
-}

api/client/beacon/health_test.go

@@ -1,112 +0,0 @@
-package beacon
-
-import (
-	"context"
-	"sync"
-	"testing"
-
-	healthTesting "github.com/prysmaticlabs/prysm/v5/api/client/beacon/testing"
-	"go.uber.org/mock/gomock"
-)
-
-func TestNodeHealth_IsHealthy(t *testing.T) {
-	tests := []struct {
-		name      string
-		isHealthy bool
-		want      bool
-	}{
-		{"initially healthy", true, true},
-		{"initially unhealthy", false, false},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			n := &NodeHealthTracker{
-				isHealthy:  &tt.isHealthy,
-				healthChan: make(chan bool, 1),
-			}
-			if got := n.IsHealthy(); got != tt.want {
-				t.Errorf("IsHealthy() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
-
-func TestNodeHealth_UpdateNodeHealth(t *testing.T) {
-	tests := []struct {
-		name       string
-		initial    bool // Initial health status
-		newStatus  bool // Status to update to
-		shouldSend bool // Should a message be sent through the channel
-	}{
-		{"healthy to unhealthy", true, false, true},
-		{"unhealthy to healthy", false, true, true},
-		{"remain healthy", true, true, false},
-		{"remain unhealthy", false, false, false},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			ctrl := gomock.NewController(t)
-			defer ctrl.Finish()
-			client := healthTesting.NewMockHealthClient(ctrl)
-			client.EXPECT().IsHealthy(gomock.Any()).Return(tt.newStatus)
-			n := &NodeHealthTracker{
-				isHealthy:  &tt.initial,
-				node:       client,
-				healthChan: make(chan bool, 1),
-			}
-
-			s := n.CheckHealth(context.Background())
-			// Check if health status was updated
-			if s != tt.newStatus {
-				t.Errorf("UpdateNodeHealth() failed to update isHealthy from %v to %v", tt.initial, tt.newStatus)
-			}
-
-			select {
-			case status := <-n.HealthUpdates():
-				if !tt.shouldSend {
-					t.Errorf("UpdateNodeHealth() unexpectedly sent status %v to HealthCh", status)
-				} else if status != tt.newStatus {
-					t.Errorf("UpdateNodeHealth() sent wrong status %v, want %v", status, tt.newStatus)
-				}
-			default:
-				if tt.shouldSend {
-					t.Error("UpdateNodeHealth() did not send any status to HealthCh when expected")
-				}
-			}
-		})
-	}
-}
-
-func TestNodeHealth_Concurrency(t *testing.T) {
-	ctrl := gomock.NewController(t)
-	defer ctrl.Finish()
-	client := healthTesting.NewMockHealthClient(ctrl)
-	n := NewNodeHealthTracker(client)
-	var wg sync.WaitGroup
-
-	// Number of goroutines to spawn for both reading and writing
-	numGoroutines := 6
-
-	wg.Add(numGoroutines * 2) // for readers and writers
-
-	// Concurrently update health status
-	for i := 0; i < numGoroutines; i++ {
-		go func() {
-			defer wg.Done()
-			client.EXPECT().IsHealthy(gomock.Any()).Return(false).Times(1)
-			n.CheckHealth(context.Background())
-			client.EXPECT().IsHealthy(gomock.Any()).Return(true).Times(1)
-			n.CheckHealth(context.Background())
-		}()
-	}
-
-	// Concurrently read health status
-	for i := 0; i < numGoroutines; i++ {
-		go func() {
-			defer wg.Done()
-			_ = n.IsHealthy() // Just read the value
-		}()
-	}
-
-	wg.Wait() // Wait for all goroutines to finish
-}

api/client/beacon/iface/health.go

@@ -1,13 +0,0 @@
-package iface
-
-import "context"
-
-type HealthTracker interface {
-	HealthUpdates() <-chan bool
-	IsHealthy() bool
-	CheckHealth(ctx context.Context) bool
-}
-
-type HealthNode interface {
-	IsHealthy(ctx context.Context) bool
-}

api/client/beacon/template.go

@@ -0,0 +1,34 @@
+package beacon
+
+import (
+	"bytes"
+	"fmt"
+	"text/template"
+)
+
+type templateFn func(StateOrBlockId) string
+
+var getBlockRootTpl templateFn
+var getForkTpl templateFn
+
+func init() {
+	// idTemplate is used to create template functions that can interpolate StateOrBlockId values.
+	idTemplate := func(ts string) func(StateOrBlockId) string {
+		t := template.Must(template.New("").Parse(ts))
+		f := func(id StateOrBlockId) string {
+			b := bytes.NewBuffer(nil)
+			err := t.Execute(b, struct{ Id string }{Id: string(id)})
+			if err != nil {
+				panic(fmt.Sprintf("invalid idTemplate: %s", ts))
+			}
+			return b.String()
+		}
+		// run the template to ensure that it is valid
+		// this should happen load time (using package scoped vars) to ensure runtime errors aren't possible
+		_ = f(IdGenesis)
+		return f
+	}
+
+	getBlockRootTpl = idTemplate(getBlockRootPath)
+	getForkTpl = idTemplate(getForkForStatePath)
+}

api/client/beacon/testing/BUILD.bazel

@@ -1,12 +0,0 @@
-load("@prysm//tools/go:def.bzl", "go_library")
-
-go_library(
-    name = "go_default_library",
-    srcs = ["mock.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/beacon/testing",
-    visibility = ["//visibility:public"],
-    deps = [
-        "//api/client/beacon/iface:go_default_library",
-        "@org_uber_go_mock//gomock:go_default_library",
-    ],
-)

api/client/beacon/testing/mock.go

@@ -1,59 +0,0 @@
-package testing
-
-import (
-	"context"
-	"reflect"
-	"sync"
-
-	"github.com/prysmaticlabs/prysm/v5/api/client/beacon/iface"
-	"go.uber.org/mock/gomock"
-)
-
-var (
-	_ = iface.HealthNode(&MockHealthClient{})
-)
-
-// MockHealthClient is a mock of HealthClient interface.
-type MockHealthClient struct {
-	ctrl     *gomock.Controller
-	recorder *MockHealthClientMockRecorder
-	sync.Mutex
-}
-
-// MockHealthClientMockRecorder is the mock recorder for MockHealthClient.
-type MockHealthClientMockRecorder struct {
-	mock *MockHealthClient
-}
-
-// IsHealthy mocks base method.
-func (m *MockHealthClient) IsHealthy(arg0 context.Context) bool {
-	m.Lock()
-	defer m.Unlock()
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "IsHealthy", arg0)
-	ret0, ok := ret[0].(bool)
-	if !ok {
-		return false
-	}
-	return ret0
-}
-
-// EXPECT returns an object that allows the caller to indicate expected use.
-func (m *MockHealthClient) EXPECT() *MockHealthClientMockRecorder {
-	return m.recorder
-}
-
-// IsHealthy indicates an expected call of IsHealthy.
-func (mr *MockHealthClientMockRecorder) IsHealthy(arg0 any) *gomock.Call {
-	mr.mock.Lock()
-	defer mr.mock.Unlock()
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "IsHealthy", reflect.TypeOf((*MockHealthClient)(nil).IsHealthy), arg0)
-}
-
-// NewMockHealthClient creates a new mock instance.
-func NewMockHealthClient(ctrl *gomock.Controller) *MockHealthClient {
-	mock := &MockHealthClient{ctrl: ctrl}
-	mock.recorder = &MockHealthClientMockRecorder{mock}
-	return mock
-}

api/client/builder/BUILD.bazel

@@ -8,12 +8,11 @@ go_library(
         "errors.go",
         "types.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/builder",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/client/builder",
     visibility = ["//visibility:public"],
     deps = [
         "//api:go_default_library",
         "//api/client:go_default_library",
-        "//api/server:go_default_library",
         "//api/server/structs:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
@@ -28,7 +27,6 @@ go_library(
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//runtime/version:go_default_library",
-        "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prysmaticlabs_fastssz//:go_default_library",
@@ -52,6 +50,7 @@ go_test(
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//math:go_default_library",
@@ -60,6 +59,7 @@ go_test(
         "//runtime/version:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
+        "//testing/util:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prysmaticlabs_go_bitfield//:go_default_library",

api/client/builder/bid.go

@@ -1,14 +1,14 @@
 package builder
 
 import (
+	consensus_types "github.com/OffchainLabs/prysm/v6/consensus-types"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	v1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	ssz "github.com/prysmaticlabs/fastssz"
-	consensus_types "github.com/prysmaticlabs/prysm/v5/consensus-types"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	v1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )
 
 // SignedBid is an interface describing the method set of a signed builder bid.

api/client/builder/client.go

@@ -12,32 +12,39 @@ import (
 	"strings"
 	"text/template"
 
+	"github.com/OffchainLabs/prysm/v6/api"
+	"github.com/OffchainLabs/prysm/v6/api/client"
+	"github.com/OffchainLabs/prysm/v6/api/server/structs"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
+	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
+	v1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api"
-	"github.com/prysmaticlabs/prysm/v5/api/client"
-	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing"
-	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
-	v1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	log "github.com/sirupsen/logrus"
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 )
 
 const (
-	getExecHeaderPath          = "/eth/v1/builder/header/{{.Slot}}/{{.ParentHash}}/{{.Pubkey}}"
-	getStatus                  = "/eth/v1/builder/status"
-	postBlindedBeaconBlockPath = "/eth/v1/builder/blinded_blocks"
-	postRegisterValidatorPath  = "/eth/v1/builder/validators"
+	getExecHeaderPath            = "/eth/v1/builder/header/{{.Slot}}/{{.ParentHash}}/{{.Pubkey}}"
+	getStatus                    = "/eth/v1/builder/status"
+	postBlindedBeaconBlockPath   = "/eth/v1/builder/blinded_blocks"
+	postBlindedBeaconBlockV2Path = "/eth/v2/builder/blinded_blocks"
+	postRegisterValidatorPath    = "/eth/v1/builder/validators"
 )
 
-var errMalformedHostname = errors.New("hostname must include port, separated by one colon, like example.com:3500")
-var errMalformedRequest = errors.New("required request data are missing")
-var errNotBlinded = errors.New("submitted block is not blinded")
+var (
+	vrExample             = &ethpb.SignedValidatorRegistrationV1{}
+	vrSize                = vrExample.SizeSSZ()
+	errMalformedHostname  = errors.New("hostname must include port, separated by one colon, like example.com:3500")
+	errMalformedRequest   = errors.New("required request data are missing")
+	errNotBlinded         = errors.New("submitted block is not blinded")
+	errVersionUnsupported = errors.New("version is not supported")
+)
 
 // ClientOpt is a functional option for the Client type (http.Client wrapper)
 type ClientOpt func(*Client)
@@ -52,6 +59,12 @@ func WithObserver(m observer) ClientOpt {
 	}
 }
 
+func WithSSZ() ClientOpt {
+	return func(c *Client) {
+		c.sszEnabled = true
+	}
+}
+
 type requestLogger struct{}
 
 func (*requestLogger) observe(r *http.Request) (e error) {
@@ -60,7 +73,7 @@ func (*requestLogger) observe(r *http.Request) (e error) {
 		log.WithFields(log.Fields{
 			"bodyBase64": "(nil value)",
 			"url":        r.URL.String(),
-		}).Info("builder http request")
+		}).Info("Builder http request")
 		return nil
 	}
 	t := io.TeeReader(r.Body, b)
@@ -77,7 +90,7 @@ func (*requestLogger) observe(r *http.Request) (e error) {
 	log.WithFields(log.Fields{
 		"bodyBase64": string(body),
 		"url":        r.URL.String(),
-	}).Info("builder http request")
+	}).Info("Builder http request")
 
 	return nil
 }
@@ -89,15 +102,17 @@ type BuilderClient interface {
 	NodeURL() string
 	GetHeader(ctx context.Context, slot primitives.Slot, parentHash [32]byte, pubkey [48]byte) (SignedBid, error)
 	RegisterValidator(ctx context.Context, svr []*ethpb.SignedValidatorRegistrationV1) error
-	SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, *v1.BlobsBundle, error)
+	SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, v1.BlobsBundler, error)
+	SubmitBlindedBlockPostFulu(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) error
 	Status(ctx context.Context) error
 }
 
 // Client provides a collection of helper methods for calling Builder API endpoints.
 type Client struct {
-	hc      *http.Client
-	baseURL *url.URL
-	obvs    []observer
+	hc         *http.Client
+	baseURL    *url.URL
+	obvs       []observer
+	sszEnabled bool
 }
 
 // NewClient constructs a new client with the provided options (ex WithTimeout).
@@ -139,7 +154,8 @@ func (c *Client) NodeURL() string {
 type reqOption func(*http.Request)
 
 // do is a generic, opinionated request function to reduce boilerplate amongst the methods in this package api/client/builder.
-func (c *Client) do(ctx context.Context, method string, path string, body io.Reader, opts ...reqOption) (res []byte, err error) {
+// It validates that the HTTP response status matches the expectedStatus parameter.
+func (c *Client) do(ctx context.Context, method string, path string, body io.Reader, expectedStatus int, opts ...reqOption) (res []byte, header http.Header, err error) {
 	ctx, span := trace.StartSpan(ctx, "builder.client.do")
 	defer func() {
 		tracing.AnnotateError(span, err)
@@ -155,10 +171,6 @@ func (c *Client) do(ctx context.Context, method string, path string, body io.Rea
 	if err != nil {
 		return
 	}
-	if method == http.MethodPost {
-		req.Header.Set("Content-Type", api.JsonMediaType)
-	}
-	req.Header.Set("Accept", api.JsonMediaType)
 	req.Header.Add("User-Agent", version.BuildData())
 	for _, o := range opts {
 		o(req)
@@ -178,8 +190,8 @@ func (c *Client) do(ctx context.Context, method string, path string, body io.Rea
 			log.WithError(closeErr).Error("Failed to close response body")
 		}
 	}()
-	if r.StatusCode != http.StatusOK {
-		err = non200Err(r)
+	if r.StatusCode != expectedStatus {
+		err = unexpectedStatusErr(r, expectedStatus)
 		return
 	}
 	res, err = io.ReadAll(io.LimitReader(r.Body, client.MaxBodySize))
@@ -187,6 +199,7 @@ func (c *Client) do(ctx context.Context, method string, path string, body io.Rea
 		err = errors.Wrap(err, "error reading http response body from builder server")
 		return
 	}
+	header = r.Header
 	return
 }
 
@@ -216,64 +229,145 @@ func (c *Client) GetHeader(ctx context.Context, slot primitives.Slot, parentHash
 	if err != nil {
 		return nil, err
 	}
-	hb, err := c.do(ctx, http.MethodGet, path, nil)
-	if err != nil {
-		return nil, err
+	var getOpts reqOption
+	if c.sszEnabled {
+		getOpts = func(r *http.Request) {
+			r.Header.Set("Accept", api.OctetStreamMediaType)
+		}
+	} else {
+		getOpts = func(r *http.Request) {
+			r.Header.Set("Accept", api.JsonMediaType)
+		}
 	}
-	v := &VersionResponse{}
-	if err := json.Unmarshal(hb, v); err != nil {
-		return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
+	data, header, err := c.do(ctx, http.MethodGet, path, nil, http.StatusOK, getOpts)
+	if err != nil {
+		return nil, errors.Wrap(err, "error getting header from builder server")
 	}
 
-	ver, err := version.FromString(strings.ToLower(v.Version))
+	bid, err := c.parseHeaderResponse(data, header, slot)
 	if err != nil {
-		return nil, errors.Wrap(err, fmt.Sprintf("unsupported header version %s", strings.ToLower(v.Version)))
+		return nil, errors.Wrapf(
+			err,
+			"error rendering exec header template with slot=%d, parentHash=%#x, pubkey=%#x",
+			slot,
+			parentHash,
+			pubkey,
+		)
 	}
+	return bid, nil
+}
+
+func (c *Client) parseHeaderResponse(data []byte, header http.Header, slot primitives.Slot) (SignedBid, error) {
+	var versionHeader string
+	if c.sszEnabled || header.Get(api.VersionHeader) != "" {
+		versionHeader = header.Get(api.VersionHeader)
+	} else {
+		// If we don't have a version header, attempt to parse JSON for version
+		v := &VersionResponse{}
+		if err := json.Unmarshal(data, v); err != nil {
+			return nil, errors.Wrap(
+				err,
+				"error unmarshaling builder GetHeader response",
+			)
+		}
+		versionHeader = strings.ToLower(v.Version)
+	}
+
+	ver, err := version.FromString(versionHeader)
+	if err != nil {
+		return nil, errors.Wrap(err, fmt.Sprintf("unsupported header version %s", versionHeader))
+	}
+
 	if ver >= version.Electra {
-		hr := &ExecHeaderResponseElectra{}
-		if err := json.Unmarshal(hb, hr); err != nil {
-			return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
-		}
-		p, err := hr.ToProto()
-		if err != nil {
-			return nil, errors.Wrapf(err, "could not extract proto message from header")
-		}
-		return WrappedSignedBuilderBidElectra(p)
+		return c.parseHeaderElectra(data, slot)
 	}
 	if ver >= version.Deneb {
-		hr := &ExecHeaderResponseDeneb{}
-		if err := json.Unmarshal(hb, hr); err != nil {
-			return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
-		}
-		p, err := hr.ToProto()
-		if err != nil {
-			return nil, errors.Wrapf(err, "could not extract proto message from header")
-		}
-		return WrappedSignedBuilderBidDeneb(p)
+		return c.parseHeaderDeneb(data)
 	}
 	if ver >= version.Capella {
-		hr := &ExecHeaderResponseCapella{}
-		if err := json.Unmarshal(hb, hr); err != nil {
-			return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
-		}
-		p, err := hr.ToProto()
-		if err != nil {
-			return nil, errors.Wrapf(err, "could not extract proto message from header")
-		}
-		return WrappedSignedBuilderBidCapella(p)
+		return c.parseHeaderCapella(data)
 	}
 	if ver >= version.Bellatrix {
-		hr := &ExecHeaderResponse{}
-		if err := json.Unmarshal(hb, hr); err != nil {
-			return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
-		}
-		p, err := hr.ToProto()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not extract proto message from header")
-		}
-		return WrappedSignedBuilderBid(p)
+		return c.parseHeaderBellatrix(data)
 	}
-	return nil, fmt.Errorf("unsupported header version %s", strings.ToLower(v.Version))
+
+	return nil, fmt.Errorf("unsupported header version %s", versionHeader)
+}
+
+func (c *Client) parseHeaderElectra(data []byte, slot primitives.Slot) (SignedBid, error) {
+	if c.sszEnabled {
+		sb := &ethpb.SignedBuilderBidElectra{}
+		if err := sb.UnmarshalSSZ(data); err != nil {
+			return nil, errors.Wrap(err, "could not unmarshal SignedBuilderBidElectra SSZ")
+		}
+		return WrappedSignedBuilderBidElectra(sb)
+	}
+	hr := &ExecHeaderResponseElectra{}
+	if err := json.Unmarshal(data, hr); err != nil {
+		return nil, errors.Wrap(err, "could not unmarshal ExecHeaderResponseElectra JSON")
+	}
+	p, err := hr.ToProto(slot)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not convert ExecHeaderResponseElectra to proto")
+	}
+	return WrappedSignedBuilderBidElectra(p)
+}
+
+func (c *Client) parseHeaderDeneb(data []byte) (SignedBid, error) {
+	if c.sszEnabled {
+		sb := &ethpb.SignedBuilderBidDeneb{}
+		if err := sb.UnmarshalSSZ(data); err != nil {
+			return nil, errors.Wrap(err, "could not unmarshal SignedBuilderBidDeneb SSZ")
+		}
+		return WrappedSignedBuilderBidDeneb(sb)
+	}
+	hr := &ExecHeaderResponseDeneb{}
+	if err := json.Unmarshal(data, hr); err != nil {
+		return nil, errors.Wrap(err, "could not unmarshal ExecHeaderResponseDeneb JSON")
+	}
+	p, err := hr.ToProto()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not convert ExecHeaderResponseDeneb to proto")
+	}
+	return WrappedSignedBuilderBidDeneb(p)
+}
+
+func (c *Client) parseHeaderCapella(data []byte) (SignedBid, error) {
+	if c.sszEnabled {
+		sb := &ethpb.SignedBuilderBidCapella{}
+		if err := sb.UnmarshalSSZ(data); err != nil {
+			return nil, errors.Wrap(err, "could not unmarshal SignedBuilderBidCapella SSZ")
+		}
+		return WrappedSignedBuilderBidCapella(sb)
+	}
+	hr := &ExecHeaderResponseCapella{}
+	if err := json.Unmarshal(data, hr); err != nil {
+		return nil, errors.Wrap(err, "could not unmarshal ExecHeaderResponseCapella JSON")
+	}
+	p, err := hr.ToProto()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not convert ExecHeaderResponseCapella to proto")
+	}
+	return WrappedSignedBuilderBidCapella(p)
+}
+
+func (c *Client) parseHeaderBellatrix(data []byte) (SignedBid, error) {
+	if c.sszEnabled {
+		sb := &ethpb.SignedBuilderBid{}
+		if err := sb.UnmarshalSSZ(data); err != nil {
+			return nil, errors.Wrap(err, "could not unmarshal SignedBuilderBid SSZ")
+		}
+		return WrappedSignedBuilderBid(sb)
+	}
+	hr := &ExecHeaderResponse{}
+	if err := json.Unmarshal(data, hr); err != nil {
+		return nil, errors.Wrap(err, "could not unmarshal ExecHeaderResponse JSON")
+	}
+	p, err := hr.ToProto()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not convert ExecHeaderResponse to proto")
+	}
+	return WrappedSignedBuilderBid(p)
 }
 
 // RegisterValidator encodes the SignedValidatorRegistrationV1 message to json (including hex-encoding the byte
@@ -288,70 +382,274 @@ func (c *Client) RegisterValidator(ctx context.Context, svr []*ethpb.SignedValid
 		tracing.AnnotateError(span, err)
 		return err
 	}
+
+	var (
+		body     []byte
+		err      error
+		postOpts reqOption
+	)
+	if c.sszEnabled {
+		postOpts = func(r *http.Request) {
+			r.Header.Set("Content-Type", api.OctetStreamMediaType)
+			r.Header.Set("Accept", api.OctetStreamMediaType)
+		}
+		body, err = sszValidatorRegisterRequest(svr)
+		if err != nil {
+			err := errors.Wrap(err, "error ssz encoding the SignedValidatorRegistration value body in RegisterValidator")
+			tracing.AnnotateError(span, err)
+			return err
+		}
+	} else {
+		postOpts = func(r *http.Request) {
+			r.Header.Set("Content-Type", api.JsonMediaType)
+			r.Header.Set("Accept", api.JsonMediaType)
+		}
+		body, err = jsonValidatorRegisterRequest(svr)
+		if err != nil {
+			err := errors.Wrap(err, "error json encoding the SignedValidatorRegistration value body in RegisterValidator")
+			tracing.AnnotateError(span, err)
+			return err
+		}
+	}
+
+	if _, _, err = c.do(ctx, http.MethodPost, postRegisterValidatorPath, bytes.NewBuffer(body), http.StatusOK, postOpts); err != nil {
+		return errors.Wrap(err, "do")
+	}
+	log.WithField("registrationCount", len(svr)).Debug("Successfully registered validator(s) on builder")
+	return nil
+}
+
+func jsonValidatorRegisterRequest(svr []*ethpb.SignedValidatorRegistrationV1) ([]byte, error) {
 	vs := make([]*structs.SignedValidatorRegistration, len(svr))
 	for i := 0; i < len(svr); i++ {
 		vs[i] = structs.SignedValidatorRegistrationFromConsensus(svr[i])
 	}
 	body, err := json.Marshal(vs)
 	if err != nil {
-		err := errors.Wrap(err, "error encoding the SignedValidatorRegistration value body in RegisterValidator")
-		tracing.AnnotateError(span, err)
-		return err
+		return nil, err
 	}
+	return body, nil
+}
 
-	_, err = c.do(ctx, http.MethodPost, postRegisterValidatorPath, bytes.NewBuffer(body))
-	if err != nil {
-		return err
+func sszValidatorRegisterRequest(svr []*ethpb.SignedValidatorRegistrationV1) ([]byte, error) {
+	if uint64(len(svr)) > params.BeaconConfig().ValidatorRegistryLimit {
+		return nil, errors.Wrap(errMalformedRequest, "validator registry limit exceeded")
 	}
-	log.WithField("registrationCount", len(svr)).Debug("Successfully registered validator(s) on builder")
-	return nil
+	ssz := make([]byte, vrSize*len(svr))
+	for i, vr := range svr {
+		sszrep, err := vr.MarshalSSZ()
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to marshal validator registry ssz")
+		}
+		copy(ssz[i*vrSize:(i+1)*vrSize], sszrep)
+	}
+	return ssz, nil
 }
 
 var errResponseVersionMismatch = errors.New("builder API response uses a different version than requested in " + api.VersionHeader + " header")
 
+func getVersionsBlockToPayload(blockVersion int) (int, error) {
+	if blockVersion >= version.Fulu {
+		return version.Fulu, nil
+	}
+	if blockVersion >= version.Deneb {
+		return version.Deneb, nil
+	}
+	if blockVersion == version.Capella {
+		return version.Capella, nil
+	}
+	if blockVersion == version.Bellatrix {
+		return version.Bellatrix, nil
+	}
+	return 0, errors.Wrapf(errVersionUnsupported, "block version %d", blockVersion)
+}
+
 // SubmitBlindedBlock calls the builder API endpoint that binds the validator to the builder and submits the block.
 // The response is the full execution payload used to create the blinded block.
-func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
+func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, v1.BlobsBundler, error) {
+	body, postOpts, err := c.buildBlindedBlockRequest(sb)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// post the blinded block - the execution payload response should contain the unblinded payload, along with the
+	// blobs bundle if it is post deneb.
+	data, header, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), http.StatusOK, postOpts)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "error posting the blinded block to the builder api")
+	}
+
+	ver, err := c.checkBlockVersion(data, header)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	expectedPayloadVer, err := getVersionsBlockToPayload(sb.Version())
+	if err != nil {
+		return nil, nil, err
+	}
+	gotPayloadVer, err := getVersionsBlockToPayload(ver)
+	if err != nil {
+		return nil, nil, err
+	}
+	if expectedPayloadVer != gotPayloadVer {
+		return nil, nil, errors.Wrapf(errResponseVersionMismatch, "expected payload version %d, got %d", expectedPayloadVer, gotPayloadVer)
+	}
+
+	ed, blobs, err := c.parseBlindedBlockResponse(data, ver)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return ed, blobs, nil
+}
+
+// SubmitBlindedBlockPostFulu calls the builder API endpoint post-Fulu where relays only return status codes.
+// This method is used after the Fulu fork when MEV-boost relays no longer return execution payloads.
+func (c *Client) SubmitBlindedBlockPostFulu(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) error {
+	body, postOpts, err := c.buildBlindedBlockRequest(sb)
+	if err != nil {
+		return err
+	}
+
+	// Post the blinded block - the response should only contain a status code (no payload)
+	_, _, err = c.do(ctx, http.MethodPost, postBlindedBeaconBlockV2Path, bytes.NewBuffer(body), http.StatusAccepted, postOpts)
+	if err != nil {
+		return errors.Wrap(err, "error posting the blinded block to the builder api post-Fulu")
+	}
+
+	// Success is indicated by no error (status 202)
+	return nil
+}
+
+func (c *Client) checkBlockVersion(respBytes []byte, header http.Header) (int, error) {
+	var versionHeader string
+	if c.sszEnabled {
+		versionHeader = strings.ToLower(header.Get(api.VersionHeader))
+	} else {
+		// fallback to JSON-based version extraction
+		v := &VersionResponse{}
+		if err := json.Unmarshal(respBytes, v); err != nil {
+			return 0, errors.Wrapf(err, "error unmarshaling JSON version fallback")
+		}
+		versionHeader = strings.ToLower(v.Version)
+	}
+
+	ver, err := version.FromString(versionHeader)
+	if err != nil {
+		return 0, errors.Wrapf(err, "unsupported header version %s", versionHeader)
+	}
+
+	return ver, nil
+}
+
+// Helper: build request body for SubmitBlindedBlock
+func (c *Client) buildBlindedBlockRequest(sb interfaces.ReadOnlySignedBeaconBlock) ([]byte, reqOption, error) {
 	if !sb.IsBlinded() {
 		return nil, nil, errNotBlinded
 	}
 
-	// massage the proto struct type data into the api response type.
+	if c.sszEnabled {
+		body, err := sb.MarshalSSZ()
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "could not marshal SSZ for blinded block")
+		}
+		opt := func(r *http.Request) {
+			r.Header.Set(api.VersionHeader, version.String(sb.Version()))
+			r.Header.Set("Content-Type", api.OctetStreamMediaType)
+			r.Header.Set("Accept", api.OctetStreamMediaType)
+		}
+		return body, opt, nil
+	}
+
 	mj, err := structs.SignedBeaconBlockMessageJsoner(sb)
 	if err != nil {
 		return nil, nil, errors.Wrap(err, "error generating blinded beacon block post request")
 	}
-
 	body, err := json.Marshal(mj)
 	if err != nil {
-		return nil, nil, errors.Wrap(err, "error marshaling blinded block post request to json")
+		return nil, nil, errors.Wrap(err, "error marshaling blinded block to JSON")
 	}
-	postOpts := func(r *http.Request) {
-		r.Header.Add("Eth-Consensus-Version", version.String(sb.Version()))
+	opt := func(r *http.Request) {
+		r.Header.Set(api.VersionHeader, version.String(sb.Version()))
 		r.Header.Set("Content-Type", api.JsonMediaType)
 		r.Header.Set("Accept", api.JsonMediaType)
 	}
-	// post the blinded block - the execution payload response should contain the unblinded payload, along with the
-	// blobs bundle if it is post deneb.
-	rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), postOpts)
-	if err != nil {
-		return nil, nil, errors.Wrap(err, "error posting the blinded block to the builder api")
+	return body, opt, nil
+}
+
+// Helper: parse the response returned by SubmitBlindedBlock
+func (c *Client) parseBlindedBlockResponse(
+	respBytes []byte,
+	forkVersion int,
+) (interfaces.ExecutionData, v1.BlobsBundler, error) {
+	if c.sszEnabled {
+		return c.parseBlindedBlockResponseSSZ(respBytes, forkVersion)
 	}
-	// ExecutionPayloadResponse parses just the outer container and the Value key, enabling it to use the .Value
-	// key to determine which underlying data type to use to finish the unmarshaling.
+	return c.parseBlindedBlockResponseJSON(respBytes, forkVersion)
+}
+
+func (c *Client) parseBlindedBlockResponseSSZ(
+	respBytes []byte,
+	forkVersion int,
+) (interfaces.ExecutionData, v1.BlobsBundler, error) {
+	if forkVersion >= version.Fulu {
+		payloadAndBlobs := &v1.ExecutionPayloadDenebAndBlobsBundleV2{}
+		if err := payloadAndBlobs.UnmarshalSSZ(respBytes); err != nil {
+			return nil, nil, errors.Wrap(err, "unable to unmarshal ExecutionPayloadDenebAndBlobsBundleV2 SSZ")
+		}
+		ed, err := blocks.NewWrappedExecutionData(payloadAndBlobs.Payload)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "unable to wrap execution data for %s", version.String(forkVersion))
+		}
+		return ed, payloadAndBlobs.BlobsBundle, nil
+	} else if forkVersion >= version.Deneb {
+		payloadAndBlobs := &v1.ExecutionPayloadDenebAndBlobsBundle{}
+		if err := payloadAndBlobs.UnmarshalSSZ(respBytes); err != nil {
+			return nil, nil, errors.Wrap(err, "unable to unmarshal ExecutionPayloadDenebAndBlobsBundle SSZ")
+		}
+		ed, err := blocks.NewWrappedExecutionData(payloadAndBlobs.Payload)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "unable to wrap execution data for %s", version.String(forkVersion))
+		}
+		return ed, payloadAndBlobs.BlobsBundle, nil
+	} else if forkVersion >= version.Capella {
+		payload := &v1.ExecutionPayloadCapella{}
+		if err := payload.UnmarshalSSZ(respBytes); err != nil {
+			return nil, nil, errors.Wrap(err, "unable to unmarshal ExecutionPayloadCapella SSZ")
+		}
+		ed, err := blocks.NewWrappedExecutionData(payload)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "unable to wrap execution data for %s", version.String(forkVersion))
+		}
+		return ed, nil, nil
+	} else if forkVersion >= version.Bellatrix {
+		payload := &v1.ExecutionPayload{}
+		if err := payload.UnmarshalSSZ(respBytes); err != nil {
+			return nil, nil, errors.Wrap(err, "unable to unmarshal ExecutionPayload SSZ")
+		}
+		ed, err := blocks.NewWrappedExecutionData(payload)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "unable to wrap execution data for %s", version.String(forkVersion))
+		}
+		return ed, nil, nil
+	} else {
+		return nil, nil, fmt.Errorf("unsupported header version %s", version.String(forkVersion))
+	}
+}
+
+func (c *Client) parseBlindedBlockResponseJSON(
+	respBytes []byte,
+	forkVersion int,
+) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
 	ep := &ExecutionPayloadResponse{}
-	if err := json.Unmarshal(rb, ep); err != nil {
-		return nil, nil, errors.Wrap(err, "error unmarshaling the builder ExecutionPayloadResponse")
+	if err := json.Unmarshal(respBytes, ep); err != nil {
+		return nil, nil, errors.Wrap(err, "error unmarshaling ExecutionPayloadResponse")
 	}
-	if strings.ToLower(ep.Version) != version.String(sb.Version()) {
-		return nil, nil, errors.Wrapf(errResponseVersionMismatch, "req=%s, recv=%s", strings.ToLower(ep.Version), version.String(sb.Version()))
-	}
-	// This parses the rest of the response and returns the inner data field.
 	pp, err := ep.ParsePayload()
 	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to parse execution payload from builder with version=%s", ep.Version)
+		return nil, nil, errors.Wrapf(err, "failed to parse payload with version=%s", ep.Version)
 	}
-	// Get the payload as a proto.Message so it can be wrapped as an execution payload interface.
 	pb, err := pp.PayloadProto()
 	if err != nil {
 		return nil, nil, err
@@ -360,11 +658,13 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 	if err != nil {
 		return nil, nil, err
 	}
+
+	// Check if it contains blobs
 	bb, ok := pp.(BlobBundler)
 	if ok {
 		bbpb, err := bb.BundleProto()
 		if err != nil {
-			return nil, nil, errors.Wrapf(err, "failed to extract blobs bundle from builder response with version=%s", ep.Version)
+			return nil, nil, errors.Wrapf(err, "failed to extract blobs bundle from version=%s", ep.Version)
 		}
 		return ed, bbpb, nil
 	}
@@ -375,11 +675,14 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 // response, and an error response may have an error message. This method will return a nil value for error in the
 // happy path, and an error with information about the server response body for a non-200 response.
 func (c *Client) Status(ctx context.Context) error {
-	_, err := c.do(ctx, http.MethodGet, getStatus, nil)
+	getOpts := func(r *http.Request) {
+		r.Header.Set("Accept", api.JsonMediaType)
+	}
+	_, _, err := c.do(ctx, http.MethodGet, getStatus, nil, http.StatusOK, getOpts)
 	return err
 }
 
-func non200Err(response *http.Response) error {
+func unexpectedStatusErr(response *http.Response, expected int) error {
 	bodyBytes, err := io.ReadAll(io.LimitReader(response.Body, client.MaxErrBodySize))
 	var errMessage ErrorMessage
 	var body string
@@ -388,8 +691,20 @@ func non200Err(response *http.Response) error {
 	} else {
 		body = "response body:\n" + string(bodyBytes)
 	}
-	msg := fmt.Sprintf("code=%d, url=%s, body=%s", response.StatusCode, response.Request.URL, body)
+	msg := fmt.Sprintf("expected=%d, got=%d, url=%s, body=%s", expected, response.StatusCode, response.Request.URL, body)
 	switch response.StatusCode {
+	case http.StatusUnsupportedMediaType:
+		log.WithError(ErrUnsupportedMediaType).Debug(msg)
+		if jsonErr := json.Unmarshal(bodyBytes, &errMessage); jsonErr != nil {
+			return errors.Wrap(jsonErr, "unable to read response body")
+		}
+		return errors.Wrap(ErrUnsupportedMediaType, errMessage.Message)
+	case http.StatusNotAcceptable:
+		log.WithError(ErrNotAcceptable).Debug(msg)
+		if jsonErr := json.Unmarshal(bodyBytes, &errMessage); jsonErr != nil {
+			return errors.Wrap(jsonErr, "unable to read response body")
+		}
+		return errors.Wrap(ErrNotAcceptable, errMessage.Message)
 	case http.StatusNoContent:
 		log.WithError(ErrNoContent).Debug(msg)
 		return ErrNoContent
@@ -411,6 +726,12 @@ func non200Err(response *http.Response) error {
 			return errors.Wrap(jsonErr, "unable to read response body")
 		}
 		return errors.Wrap(ErrNotOK, errMessage.Message)
+	case http.StatusBadGateway:
+		log.WithError(ErrBadGateway).Debug(msg)
+		if jsonErr := json.Unmarshal(bodyBytes, &errMessage); jsonErr != nil {
+			return errors.Wrap(jsonErr, "unable to read response body")
+		}
+		return errors.Wrap(ErrBadGateway, errMessage.Message)
 	default:
 		log.WithError(ErrNotOK).Debug(msg)
 		return errors.Wrap(ErrNotOK, fmt.Sprintf("unsupported error code: %d", response.StatusCode))

api/client/builder/errors.go

@@ -15,3 +15,10 @@ var ErrBadRequest = errors.Wrap(ErrNotOK, "recv 400 BadRequest response from API
 // ErrNoContent specifically means that a '204 - No Content' response was received from the API.
 // Typically, a 204 is a success but in this case for the Header API means No header is available
 var ErrNoContent = errors.New("recv 204 no content response from API, No header is available")
+
+// ErrUnsupportedMediaType specifically means that a '415 - Unsupported Media Type' was received from the API.
+var ErrUnsupportedMediaType = errors.Wrap(ErrNotOK, "The media type in \"Content-Type\" header is unsupported, and the request has been rejected. This occurs when a HTTP request supplies a payload in a content-type that the server is not able to handle.")
+
+// ErrNotAcceptable specifically means that a '406 - Not Acceptable' was received from the API.
+var ErrNotAcceptable = errors.Wrap(ErrNotOK, "The accept header value is not acceptable")
+var ErrBadGateway = errors.Wrap(ErrNotOK, "recv 502 BadGateway response from API")

api/client/builder/testing/BUILD.bazel

@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = ["mock.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/builder/testing",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/client/builder/testing",
     visibility = ["//visibility:public"],
     deps = [
         "//api/client/builder:go_default_library",

api/client/builder/testing/mock.go

@@ -3,12 +3,12 @@ package testing
 import (
 	"context"
 
-	"github.com/prysmaticlabs/prysm/v5/api/client/builder"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	v1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/api/client/builder"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	v1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 )
 
 // MockClient is a mock implementation of BuilderClient.
@@ -41,10 +41,15 @@ func (m MockClient) RegisterValidator(_ context.Context, svr []*ethpb.SignedVali
 }
 
 // SubmitBlindedBlock --
-func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
+func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, v1.BlobsBundler, error) {
 	return nil, nil, nil
 }
 
+// SubmitBlindedBlockPostFulu --
+func (MockClient) SubmitBlindedBlockPostFulu(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) error {
+	return nil
+}
+
 // Status --
 func (MockClient) Status(_ context.Context) error {
 	return nil

api/client/builder/types_test.go

@@ -11,18 +11,18 @@ import (
 	"os"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/api/server/structs"
+	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	consensusblocks "github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v6/math"
+	v1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	eth "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/runtime/version"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/go-bitfield"
-	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	consensusblocks "github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v5/math"
-	v1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )
 
 func ezDecode(t *testing.T, s string) []byte {
@@ -328,72 +328,72 @@ func TestExecutionHeaderResponseUnmarshal(t *testing.T) {
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.ParentHash),
+			actual:   hr.Data.Message.Header.ParentHash,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hexutil.Encode(hr.Data.Message.Header.FeeRecipient),
+			actual:   hr.Data.Message.Header.FeeRecipient,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.StateRoot),
+			actual:   hr.Data.Message.Header.StateRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.ReceiptsRoot),
+			actual:   hr.Data.Message.Header.ReceiptsRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hexutil.Encode(hr.Data.Message.Header.LogsBloom),
+			actual:   hr.Data.Message.Header.LogsBloom,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.PrevRandao),
+			actual:   hr.Data.Message.Header.PrevRandao,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BlockNumber),
+			actual:   hr.Data.Message.Header.BlockNumber,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasLimit),
+			actual:   hr.Data.Message.Header.GasLimit,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasUsed),
+			actual:   hr.Data.Message.Header.GasUsed,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.Timestamp),
+			actual:   hr.Data.Message.Header.Timestamp,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.ExtraData),
+			actual:   hr.Data.Message.Header.ExtraData,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BaseFeePerGas),
+			actual:   hr.Data.Message.Header.BaseFeePerGas,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.BlockHash),
+			actual:   hr.Data.Message.Header.BlockHash,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockHash",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.TransactionsRoot),
+			actual:   hr.Data.Message.Header.TransactionsRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.TransactionsRoot",
 		},
 	}
@@ -427,77 +427,77 @@ func TestExecutionHeaderResponseCapellaUnmarshal(t *testing.T) {
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.ParentHash),
+			actual:   hr.Data.Message.Header.ParentHash,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hexutil.Encode(hr.Data.Message.Header.FeeRecipient),
+			actual:   hr.Data.Message.Header.FeeRecipient,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.StateRoot),
+			actual:   hr.Data.Message.Header.StateRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.ReceiptsRoot),
+			actual:   hr.Data.Message.Header.ReceiptsRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hexutil.Encode(hr.Data.Message.Header.LogsBloom),
+			actual:   hr.Data.Message.Header.LogsBloom,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.PrevRandao),
+			actual:   hr.Data.Message.Header.PrevRandao,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BlockNumber),
+			actual:   hr.Data.Message.Header.BlockNumber,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasLimit),
+			actual:   hr.Data.Message.Header.GasLimit,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasUsed),
+			actual:   hr.Data.Message.Header.GasUsed,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.Timestamp),
+			actual:   hr.Data.Message.Header.Timestamp,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.ExtraData),
+			actual:   hr.Data.Message.Header.ExtraData,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BaseFeePerGas),
+			actual:   hr.Data.Message.Header.BaseFeePerGas,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.BlockHash),
+			actual:   hr.Data.Message.Header.BlockHash,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockHash",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.TransactionsRoot),
+			actual:   hr.Data.Message.Header.TransactionsRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.TransactionsRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(hr.Data.Message.Header.WithdrawalsRoot),
+			actual:   hr.Data.Message.Header.WithdrawalsRoot,
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.WithdrawalsRoot",
 		},
 	}
@@ -867,88 +867,6 @@ var testExampleExecutionPayloadDenebDifferentProofCount = fmt.Sprintf(`{
   }
 }`, hexutil.Encode(make([]byte, fieldparams.BlobLength)))
 
-func TestExecutionPayloadResponseUnmarshal(t *testing.T) {
-	epr := &ExecPayloadResponse{}
-	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayload), epr))
-	cases := []struct {
-		expected string
-		actual   string
-		name     string
-	}{
-		{
-			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ParentHash),
-			name:     "ExecPayloadResponse.ExecutionPayload.ParentHash",
-		},
-		{
-			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hexutil.Encode(epr.Data.FeeRecipient),
-			name:     "ExecPayloadResponse.ExecutionPayload.FeeRecipient",
-		},
-		{
-			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.StateRoot),
-			name:     "ExecPayloadResponse.ExecutionPayload.StateRoot",
-		},
-		{
-			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ReceiptsRoot),
-			name:     "ExecPayloadResponse.ExecutionPayload.ReceiptsRoot",
-		},
-		{
-			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hexutil.Encode(epr.Data.LogsBloom),
-			name:     "ExecPayloadResponse.ExecutionPayload.LogsBloom",
-		},
-		{
-			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.PrevRandao),
-			name:     "ExecPayloadResponse.ExecutionPayload.PrevRandao",
-		},
-		{
-			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.BlockNumber),
-			name:     "ExecPayloadResponse.ExecutionPayload.BlockNumber",
-		},
-		{
-			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.GasLimit),
-			name:     "ExecPayloadResponse.ExecutionPayload.GasLimit",
-		},
-		{
-			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.GasUsed),
-			name:     "ExecPayloadResponse.ExecutionPayload.GasUsed",
-		},
-		{
-			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.Timestamp),
-			name:     "ExecPayloadResponse.ExecutionPayload.Timestamp",
-		},
-		{
-			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExtraData),
-			name:     "ExecPayloadResponse.ExecutionPayload.ExtraData",
-		},
-		{
-			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   fmt.Sprintf("%d", epr.Data.BaseFeePerGas),
-			name:     "ExecPayloadResponse.ExecutionPayload.BaseFeePerGas",
-		},
-		{
-			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.BlockHash),
-			name:     "ExecPayloadResponse.ExecutionPayload.BlockHash",
-		},
-	}
-	for _, c := range cases {
-		require.Equal(t, c.expected, c.actual, fmt.Sprintf("unexpected value for field %s", c.name))
-	}
-	require.Equal(t, 1, len(epr.Data.Transactions))
-	txHash := "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
-	require.Equal(t, txHash, hexutil.Encode(epr.Data.Transactions[0]))
-}
-
 func TestExecutionPayloadResponseCapellaUnmarshal(t *testing.T) {
 	epr := &ExecPayloadResponseCapella{}
 	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayloadCapella), epr))
@@ -959,67 +877,67 @@ func TestExecutionPayloadResponseCapellaUnmarshal(t *testing.T) {
 	}{
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ParentHash),
+			actual:   epr.Data.ParentHash,
 			name:     "ExecPayloadResponse.ExecutionPayload.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hexutil.Encode(epr.Data.FeeRecipient),
+			actual:   epr.Data.FeeRecipient,
 			name:     "ExecPayloadResponse.ExecutionPayload.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.StateRoot),
+			actual:   epr.Data.StateRoot,
 			name:     "ExecPayloadResponse.ExecutionPayload.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ReceiptsRoot),
+			actual:   epr.Data.ReceiptsRoot,
 			name:     "ExecPayloadResponse.ExecutionPayload.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hexutil.Encode(epr.Data.LogsBloom),
+			actual:   epr.Data.LogsBloom,
 			name:     "ExecPayloadResponse.ExecutionPayload.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.PrevRandao),
+			actual:   epr.Data.PrevRandao,
 			name:     "ExecPayloadResponse.ExecutionPayload.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.BlockNumber),
+			actual:   epr.Data.BlockNumber,
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.GasLimit),
+			actual:   epr.Data.GasLimit,
 			name:     "ExecPayloadResponse.ExecutionPayload.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.GasUsed),
+			actual:   epr.Data.GasUsed,
 			name:     "ExecPayloadResponse.ExecutionPayload.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.Timestamp),
+			actual:   epr.Data.Timestamp,
 			name:     "ExecPayloadResponse.ExecutionPayload.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExtraData),
+			actual:   epr.Data.ExtraData,
 			name:     "ExecPayloadResponse.ExecutionPayload.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   fmt.Sprintf("%d", epr.Data.BaseFeePerGas),
+			actual:   epr.Data.BaseFeePerGas,
 			name:     "ExecPayloadResponse.ExecutionPayload.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.BlockHash),
+			actual:   epr.Data.BlockHash,
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockHash",
 		},
 	}
@@ -1028,14 +946,14 @@ func TestExecutionPayloadResponseCapellaUnmarshal(t *testing.T) {
 	}
 	require.Equal(t, 1, len(epr.Data.Transactions))
 	txHash := "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
-	require.Equal(t, txHash, hexutil.Encode(epr.Data.Transactions[0]))
+	require.Equal(t, txHash, epr.Data.Transactions[0])
 
 	require.Equal(t, 1, len(epr.Data.Withdrawals))
 	w := epr.Data.Withdrawals[0]
-	assert.Equal(t, uint64(1), w.Index.Uint64())
-	assert.Equal(t, uint64(1), w.ValidatorIndex.Uint64())
-	assert.DeepEqual(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943", w.Address.String())
-	assert.Equal(t, uint64(1), w.Amount.Uint64())
+	assert.Equal(t, "1", w.WithdrawalIndex)
+	assert.Equal(t, "1", w.ValidatorIndex)
+	assert.DeepEqual(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943", w.ExecutionAddress)
+	assert.Equal(t, "1", w.Amount)
 }
 
 func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
@@ -1048,77 +966,77 @@ func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
 	}{
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ParentHash),
+			actual:   epr.Data.ExecutionPayload.ParentHash,
 			name:     "ExecPayloadResponse.ExecutionPayload.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.FeeRecipient),
+			actual:   epr.Data.ExecutionPayload.FeeRecipient,
 			name:     "ExecPayloadResponse.ExecutionPayload.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.StateRoot),
+			actual:   epr.Data.ExecutionPayload.StateRoot,
 			name:     "ExecPayloadResponse.ExecutionPayload.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ReceiptsRoot),
+			actual:   epr.Data.ExecutionPayload.ReceiptsRoot,
 			name:     "ExecPayloadResponse.ExecutionPayload.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.LogsBloom),
+			actual:   epr.Data.ExecutionPayload.LogsBloom,
 			name:     "ExecPayloadResponse.ExecutionPayload.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.PrevRandao),
+			actual:   epr.Data.ExecutionPayload.PrevRandao,
 			name:     "ExecPayloadResponse.ExecutionPayload.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BlockNumber),
+			actual:   epr.Data.ExecutionPayload.BlockNumber,
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.GasLimit),
+			actual:   epr.Data.ExecutionPayload.GasLimit,
 			name:     "ExecPayloadResponse.ExecutionPayload.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.GasUsed),
+			actual:   epr.Data.ExecutionPayload.GasUsed,
 			name:     "ExecPayloadResponse.ExecutionPayload.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.Timestamp),
+			actual:   epr.Data.ExecutionPayload.Timestamp,
 			name:     "ExecPayloadResponse.ExecutionPayload.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ExtraData),
+			actual:   epr.Data.ExecutionPayload.ExtraData,
 			name:     "ExecPayloadResponse.ExecutionPayload.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BaseFeePerGas),
+			actual:   epr.Data.ExecutionPayload.BaseFeePerGas,
 			name:     "ExecPayloadResponse.ExecutionPayload.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hexutil.Encode(epr.Data.ExecutionPayload.BlockHash),
+			actual:   epr.Data.ExecutionPayload.BlockHash,
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockHash",
 		},
 		{
 			expected: "2",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BlobGasUsed),
+			actual:   epr.Data.ExecutionPayload.BlobGasUsed,
 			name:     "ExecPayloadResponse.ExecutionPayload.BlobGasUsed",
 		},
 		{
 			expected: "3",
-			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.ExcessBlobGas),
+			actual:   epr.Data.ExecutionPayload.ExcessBlobGas,
 			name:     "ExecPayloadResponse.ExecutionPayload.ExcessBlobGas",
 		},
 	}
@@ -1127,64 +1045,16 @@ func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
 	}
 	require.Equal(t, 1, len(epr.Data.ExecutionPayload.Transactions))
 	txHash := "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
-	require.Equal(t, txHash, hexutil.Encode(epr.Data.ExecutionPayload.Transactions[0]))
+	require.Equal(t, txHash, epr.Data.ExecutionPayload.Transactions[0])
 
 	require.Equal(t, 1, len(epr.Data.ExecutionPayload.Withdrawals))
 	w := epr.Data.ExecutionPayload.Withdrawals[0]
-	assert.Equal(t, uint64(1), w.Index.Uint64())
-	assert.Equal(t, uint64(1), w.ValidatorIndex.Uint64())
-	assert.DeepEqual(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943", w.Address.String())
-	assert.Equal(t, uint64(1), w.Amount.Uint64())
-	assert.Equal(t, uint64(2), uint64(epr.Data.ExecutionPayload.BlobGasUsed))
-	assert.Equal(t, uint64(3), uint64(epr.Data.ExecutionPayload.ExcessBlobGas))
-}
-
-func TestExecutionPayloadResponseToProto(t *testing.T) {
-	hr := &ExecPayloadResponse{}
-	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayload), hr))
-	p, err := hr.ToProto()
-	require.NoError(t, err)
-
-	parentHash, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
-	require.NoError(t, err)
-	feeRecipient, err := hexutil.Decode("0xabcf8e0d4e9587369b2301d0790347320302cc09")
-	require.NoError(t, err)
-	stateRoot, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
-	require.NoError(t, err)
-	receiptsRoot, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
-	require.NoError(t, err)
-	logsBloom, err := hexutil.Decode("0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
-	require.NoError(t, err)
-	prevRandao, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
-	require.NoError(t, err)
-	extraData, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
-	require.NoError(t, err)
-	blockHash, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
-	require.NoError(t, err)
-
-	tx, err := hexutil.Decode("0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86")
-	require.NoError(t, err)
-	txList := [][]byte{tx}
-
-	bfpg, err := stringToUint256("452312848583266388373324160190187140051835877600158453279131187530910662656")
-	require.NoError(t, err)
-	expected := &v1.ExecutionPayload{
-		ParentHash:    parentHash,
-		FeeRecipient:  feeRecipient,
-		StateRoot:     stateRoot,
-		ReceiptsRoot:  receiptsRoot,
-		LogsBloom:     logsBloom,
-		PrevRandao:    prevRandao,
-		BlockNumber:   1,
-		GasLimit:      1,
-		GasUsed:       1,
-		Timestamp:     1,
-		ExtraData:     extraData,
-		BaseFeePerGas: bfpg.SSZBytes(),
-		BlockHash:     blockHash,
-		Transactions:  txList,
-	}
-	require.DeepEqual(t, expected, p)
+	assert.Equal(t, "1", w.WithdrawalIndex)
+	assert.Equal(t, "1", w.ValidatorIndex)
+	assert.DeepEqual(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943", w.ExecutionAddress)
+	assert.Equal(t, "1", w.Amount)
+	assert.Equal(t, "2", epr.Data.ExecutionPayload.BlobGasUsed)
+	assert.Equal(t, "3", epr.Data.ExecutionPayload.ExcessBlobGas)
 }
 
 func TestExecutionPayloadResponseCapellaToProto(t *testing.T) {
@@ -1352,16 +1222,6 @@ func pbEth1Data() *eth.Eth1Data {
 	}
 }
 
-func TestEth1DataMarshal(t *testing.T) {
-	ed := &Eth1Data{
-		Eth1Data: pbEth1Data(),
-	}
-	b, err := json.Marshal(ed)
-	require.NoError(t, err)
-	expected := `{"deposit_root":"0x0000000000000000000000000000000000000000000000000000000000000000","deposit_count":"23","block_hash":"0x0000000000000000000000000000000000000000000000000000000000000000"}`
-	require.Equal(t, expected, string(b))
-}
-
 func pbSyncAggregate() *eth.SyncAggregate {
 	return &eth.SyncAggregate{
 		SyncCommitteeSignature: make([]byte, 48),
@@ -1369,14 +1229,6 @@ func pbSyncAggregate() *eth.SyncAggregate {
 	}
 }
 
-func TestSyncAggregate_MarshalJSON(t *testing.T) {
-	sa := &SyncAggregate{pbSyncAggregate()}
-	b, err := json.Marshal(sa)
-	require.NoError(t, err)
-	expected := `{"sync_committee_bits":"0x01","sync_committee_signature":"0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"}`
-	require.Equal(t, expected, string(b))
-}
-
 func pbDeposit(t *testing.T) *eth.Deposit {
 	return &eth.Deposit{
 		Proof: [][]byte{ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")},
@@ -1389,16 +1241,6 @@ func pbDeposit(t *testing.T) *eth.Deposit {
 	}
 }
 
-func TestDeposit_MarshalJSON(t *testing.T) {
-	d := &Deposit{
-		Deposit: pbDeposit(t),
-	}
-	b, err := json.Marshal(d)
-	require.NoError(t, err)
-	expected := `{"proof":["0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"],"data":{"pubkey":"0x93247f2209abcacf57b75a51dafae777f9dd38bc7053d1af526f220a7489a6d3a2753e5f3e8b1cfe39b56f43611df74a","withdrawal_credentials":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","amount":"1","signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"}}`
-	require.Equal(t, expected, string(b))
-}
-
 func pbSignedVoluntaryExit(t *testing.T) *eth.SignedVoluntaryExit {
 	return &eth.SignedVoluntaryExit{
 		Exit: &eth.VoluntaryExit{
@@ -1409,16 +1251,6 @@ func pbSignedVoluntaryExit(t *testing.T) *eth.SignedVoluntaryExit {
 	}
 }
 
-func TestVoluntaryExit(t *testing.T) {
-	ve := &SignedVoluntaryExit{
-		SignedVoluntaryExit: pbSignedVoluntaryExit(t),
-	}
-	b, err := json.Marshal(ve)
-	require.NoError(t, err)
-	expected := `{"message":{"epoch":"1","validator_index":"1"},"signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"}`
-	require.Equal(t, expected, string(b))
-}
-
 func pbAttestation(t *testing.T) *eth.Attestation {
 	return &eth.Attestation{
 		AggregationBits: bitfield.Bitlist{0x01},
@@ -1439,16 +1271,6 @@ func pbAttestation(t *testing.T) *eth.Attestation {
 	}
 }
 
-func TestAttestationMarshal(t *testing.T) {
-	a := &Attestation{
-		Attestation: pbAttestation(t),
-	}
-	b, err := json.Marshal(a)
-	require.NoError(t, err)
-	expected := `{"aggregation_bits":"0x01","data":{"slot":"1","index":"1","beacon_block_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","source":{"epoch":"1","root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"},"target":{"epoch":"1","root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}},"signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"}`
-	require.Equal(t, expected, string(b))
-}
-
 func pbAttesterSlashing(t *testing.T) *eth.AttesterSlashing {
 	return &eth.AttesterSlashing{
 		Attestation_1: &eth.IndexedAttestation{
@@ -1489,9 +1311,7 @@ func pbAttesterSlashing(t *testing.T) *eth.AttesterSlashing {
 }
 
 func TestAttesterSlashing_MarshalJSON(t *testing.T) {
-	as := &AttesterSlashing{
-		AttesterSlashing: pbAttesterSlashing(t),
-	}
+	as := structs.AttesterSlashingFromConsensus(pbAttesterSlashing(t))
 	b, err := json.Marshal(as)
 	require.NoError(t, err)
 	expected := `{"attestation_1":{"attesting_indices":["1"],"data":{"slot":"1","index":"1","beacon_block_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","source":{"epoch":"1","root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"},"target":{"epoch":"1","root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}},"signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"},"attestation_2":{"attesting_indices":["1"],"data":{"slot":"1","index":"1","beacon_block_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","source":{"epoch":"1","root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"},"target":{"epoch":"1","root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}},"signature":"0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"}}`
@@ -1599,9 +1419,8 @@ func pbExecutionPayloadHeaderDeneb(t *testing.T) *v1.ExecutionPayloadHeaderDeneb
 }
 
 func TestExecutionPayloadHeader_MarshalJSON(t *testing.T) {
-	h := &ExecutionPayloadHeader{
-		ExecutionPayloadHeader: pbExecutionPayloadHeader(t),
-	}
+	h, err := structs.ExecutionPayloadHeaderFromConsensus(pbExecutionPayloadHeader(t))
+	require.NoError(t, err)
 	b, err := json.Marshal(h)
 	require.NoError(t, err)
 	expected := `{"parent_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","fee_recipient":"0xabcf8e0d4e9587369b2301d0790347320302cc09","state_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","receipts_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","logs_bloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","prev_randao":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","block_number":"1","gas_limit":"1","gas_used":"1","timestamp":"1","extra_data":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","base_fee_per_gas":"452312848583266388373324160190187140051835877600158453279131187530910662656","block_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","transactions_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}`
@@ -1609,9 +1428,9 @@ func TestExecutionPayloadHeader_MarshalJSON(t *testing.T) {
 }
 
 func TestExecutionPayloadHeaderCapella_MarshalJSON(t *testing.T) {
-	h := &ExecutionPayloadHeaderCapella{
-		ExecutionPayloadHeaderCapella: pbExecutionPayloadHeaderCapella(t),
-	}
+	h, err := structs.ExecutionPayloadHeaderCapellaFromConsensus(pbExecutionPayloadHeaderCapella(t))
+	require.NoError(t, err)
+	require.NoError(t, err)
 	b, err := json.Marshal(h)
 	require.NoError(t, err)
 	expected := `{"parent_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","fee_recipient":"0xabcf8e0d4e9587369b2301d0790347320302cc09","state_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","receipts_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","logs_bloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","prev_randao":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","block_number":"1","gas_limit":"1","gas_used":"1","timestamp":"1","extra_data":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","base_fee_per_gas":"452312848583266388373324160190187140051835877600158453279131187530910662656","block_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","transactions_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","withdrawals_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"}`
@@ -1619,9 +1438,8 @@ func TestExecutionPayloadHeaderCapella_MarshalJSON(t *testing.T) {
 }
 
 func TestExecutionPayloadHeaderDeneb_MarshalJSON(t *testing.T) {
-	h := &ExecutionPayloadHeaderDeneb{
-		ExecutionPayloadHeaderDeneb: pbExecutionPayloadHeaderDeneb(t),
-	}
+	h, err := structs.ExecutionPayloadHeaderDenebFromConsensus(pbExecutionPayloadHeaderDeneb(t))
+	require.NoError(t, err)
 	b, err := json.Marshal(h)
 	require.NoError(t, err)
 	expected := `{"parent_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","fee_recipient":"0xabcf8e0d4e9587369b2301d0790347320302cc09","state_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","receipts_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","logs_bloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","prev_randao":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","block_number":"1","gas_limit":"1","gas_used":"1","timestamp":"1","extra_data":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","base_fee_per_gas":"452312848583266388373324160190187140051835877600158453279131187530910662656","block_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","transactions_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","withdrawals_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","blob_gas_used":"1","excess_blob_gas":"2"}`
@@ -1850,12 +1668,13 @@ func TestRoundTripUint256(t *testing.T) {
 func TestRoundTripProtoUint256(t *testing.T) {
 	h := pbExecutionPayloadHeader(t)
 	h.BaseFeePerGas = []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
-	hm := &ExecutionPayloadHeader{ExecutionPayloadHeader: h}
+	hm, err := structs.ExecutionPayloadHeaderFromConsensus(h)
+	require.NoError(t, err)
 	m, err := json.Marshal(hm)
 	require.NoError(t, err)
-	hu := &ExecutionPayloadHeader{}
+	hu := &structs.ExecutionPayloadHeader{}
 	require.NoError(t, json.Unmarshal(m, hu))
-	hp, err := hu.ToProto()
+	hp, err := hu.ToConsensus()
 	require.NoError(t, err)
 	require.DeepEqual(t, h.BaseFeePerGas, hp.BaseFeePerGas)
 }
@@ -1863,7 +1682,7 @@ func TestRoundTripProtoUint256(t *testing.T) {
 func TestExecutionPayloadHeaderRoundtrip(t *testing.T) {
 	expected, err := os.ReadFile("testdata/execution-payload.json")
 	require.NoError(t, err)
-	hu := &ExecutionPayloadHeader{}
+	hu := &structs.ExecutionPayloadHeader{}
 	require.NoError(t, json.Unmarshal(expected, hu))
 	m, err := json.Marshal(hu)
 	require.NoError(t, err)
@@ -1873,14 +1692,14 @@ func TestExecutionPayloadHeaderRoundtrip(t *testing.T) {
 func TestExecutionPayloadHeaderCapellaRoundtrip(t *testing.T) {
 	expected, err := os.ReadFile("testdata/execution-payload-capella.json")
 	require.NoError(t, err)
-	hu := &ExecutionPayloadHeaderCapella{}
+	hu := &structs.ExecutionPayloadHeaderCapella{}
 	require.NoError(t, json.Unmarshal(expected, hu))
 	m, err := json.Marshal(hu)
 	require.NoError(t, err)
 	require.DeepEqual(t, string(expected[0:len(expected)-1]), string(m))
 }
 
-func TestErrorMessage_non200Err(t *testing.T) {
+func TestErrorMessage_unexpectedStatusErr(t *testing.T) {
 	mockRequest := &http.Request{
 		URL: &url.URL{Path: "example.com"},
 	}
@@ -1960,7 +1779,7 @@ func TestErrorMessage_non200Err(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := non200Err(tt.args)
+			err := unexpectedStatusErr(tt.args, http.StatusOK)
 			if err != nil && tt.wantMessage != "" {
 				require.ErrorContains(t, tt.wantMessage, err)
 			}
@@ -1994,11 +1813,9 @@ func TestEmptyResponseBody(t *testing.T) {
 			epr := &ExecutionPayloadResponse{}
 			require.NoError(t, json.Unmarshal(encoded, epr))
 			pp, err := epr.ParsePayload()
-			require.NoError(t, err)
-			pb, err := pp.PayloadProto()
 			if err == nil {
 				require.NoError(t, err)
-				require.Equal(t, false, pb == nil)
+				require.Equal(t, false, pp == nil)
 			} else {
 				require.ErrorIs(t, err, consensusblocks.ErrNilObject)
 			}

api/client/client_test.go

@@ -4,7 +4,7 @@ import (
 	"net/url"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestValidHostname(t *testing.T) {

api/client/event/BUILD.bazel

@@ -6,7 +6,7 @@ go_library(
         "event_stream.go",
         "utils.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/event",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/client/event",
     visibility = ["//visibility:public"],
     deps = [
         "//api:go_default_library",

api/client/event/event_stream.go

@@ -7,29 +7,17 @@ import (
 	"net/url"
 	"strings"
 
+	"github.com/OffchainLabs/prysm/v6/api"
+	"github.com/OffchainLabs/prysm/v6/api/client"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api"
-	"github.com/prysmaticlabs/prysm/v5/api/client"
 	log "github.com/sirupsen/logrus"
 )
 
 const (
-	EventHead                        = "head"
-	EventBlock                       = "block"
-	EventAttestation                 = "attestation"
-	EventVoluntaryExit               = "voluntary_exit"
-	EventBlsToExecutionChange        = "bls_to_execution_change"
-	EventProposerSlashing            = "proposer_slashing"
-	EventAttesterSlashing            = "attester_slashing"
-	EventFinalizedCheckpoint         = "finalized_checkpoint"
-	EventChainReorg                  = "chain_reorg"
-	EventContributionAndProof        = "contribution_and_proof"
-	EventLightClientFinalityUpdate   = "light_client_finality_update"
-	EventLightClientOptimisticUpdate = "light_client_optimistic_update"
-	EventPayloadAttributes           = "payload_attributes"
-	EventBlobSidecar                 = "blob_sidecar"
-	EventError                       = "error"
-	EventConnectionError             = "connection_error"
+	EventHead = "head"
+
+	EventError           = "error"
+	EventConnectionError = "connection_error"
 )
 
 var (

api/client/event/event_stream_test.go

@@ -1,14 +1,13 @@
 package event
 
 import (
-	"context"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 	"time"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -30,7 +29,7 @@ func TestNewEventStream(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			_, err := NewEventStream(context.Background(), &http.Client{}, tt.host, tt.topics)
+			_, err := NewEventStream(t.Context(), &http.Client{}, tt.host, tt.topics)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("NewEventStream() error = %v, wantErr %v", err, tt.wantErr)
 			}
@@ -56,7 +55,7 @@ func TestEventStream(t *testing.T) {
 
 	topics := []string{"head"}
 	eventsChannel := make(chan *Event, 1)
-	stream, err := NewEventStream(context.Background(), http.DefaultClient, server.URL, topics)
+	stream, err := NewEventStream(t.Context(), http.DefaultClient, server.URL, topics)
 	require.NoError(t, err)
 	go stream.Subscribe(eventsChannel)
 
@@ -83,8 +82,7 @@ func TestEventStream(t *testing.T) {
 func TestEventStreamRequestError(t *testing.T) {
 	topics := []string{"head"}
 	eventsChannel := make(chan *Event, 1)
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
+	ctx := t.Context()
 
 	// use valid url that will result in failed request with nil body
 	stream, err := NewEventStream(ctx, http.DefaultClient, "http://badhost:1234", topics)

api/client/event/utils_test.go

@@ -5,7 +5,7 @@ import (
 	"bytes"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestScanLinesWithCarriage(t *testing.T) {

api/client/validator/BUILD.bazel

@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = ["client.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/validator",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/client/validator",
     visibility = ["//visibility:public"],
     deps = [
         "//api/client:go_default_library",

api/client/validator/client.go

@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/OffchainLabs/prysm/v6/api/client"
+	"github.com/OffchainLabs/prysm/v6/validator/rpc"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api/client"
-	"github.com/prysmaticlabs/prysm/v5/validator/rpc"
 )
 
 const (

api/grpc/BUILD.bazel

@@ -6,7 +6,7 @@ go_library(
         "grpcutils.go",
         "parameters.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/grpc",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/grpc",
     visibility = ["//visibility:public"],
     deps = [
         "@com_github_sirupsen_logrus//:go_default_library",

api/grpc/grpcutils_test.go

@@ -1,11 +1,10 @@
 package grpc
 
 import (
-	"context"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"google.golang.org/grpc/metadata"
 )
@@ -16,7 +15,7 @@ type customErrorData struct {
 
 func TestAppendHeaders(t *testing.T) {
 	t.Run("one_header", func(t *testing.T) {
-		ctx := AppendHeaders(context.Background(), []string{"first=value1"})
+		ctx := AppendHeaders(t.Context(), []string{"first=value1"})
 		md, ok := metadata.FromOutgoingContext(ctx)
 		require.Equal(t, true, ok, "Failed to read context metadata")
 		require.Equal(t, 1, md.Len(), "MetadataV0 contains wrong number of values")
@@ -24,7 +23,7 @@ func TestAppendHeaders(t *testing.T) {
 	})
 
 	t.Run("multiple_headers", func(t *testing.T) {
-		ctx := AppendHeaders(context.Background(), []string{"first=value1", "second=value2"})
+		ctx := AppendHeaders(t.Context(), []string{"first=value1", "second=value2"})
 		md, ok := metadata.FromOutgoingContext(ctx)
 		require.Equal(t, true, ok, "Failed to read context metadata")
 		require.Equal(t, 2, md.Len(), "MetadataV0 contains wrong number of values")
@@ -33,7 +32,7 @@ func TestAppendHeaders(t *testing.T) {
 	})
 
 	t.Run("one_empty_header", func(t *testing.T) {
-		ctx := AppendHeaders(context.Background(), []string{"first=value1", ""})
+		ctx := AppendHeaders(t.Context(), []string{"first=value1", ""})
 		md, ok := metadata.FromOutgoingContext(ctx)
 		require.Equal(t, true, ok, "Failed to read context metadata")
 		require.Equal(t, 1, md.Len(), "MetadataV0 contains wrong number of values")
@@ -42,7 +41,7 @@ func TestAppendHeaders(t *testing.T) {
 
 	t.Run("incorrect_header", func(t *testing.T) {
 		logHook := logTest.NewGlobal()
-		ctx := AppendHeaders(context.Background(), []string{"first=value1", "second"})
+		ctx := AppendHeaders(t.Context(), []string{"first=value1", "second"})
 		md, ok := metadata.FromOutgoingContext(ctx)
 		require.Equal(t, true, ok, "Failed to read context metadata")
 		require.Equal(t, 1, md.Len(), "MetadataV0 contains wrong number of values")
@@ -51,7 +50,7 @@ func TestAppendHeaders(t *testing.T) {
 	})
 
 	t.Run("header_value_with_equal_sign", func(t *testing.T) {
-		ctx := AppendHeaders(context.Background(), []string{"first=value=1"})
+		ctx := AppendHeaders(t.Context(), []string{"first=value=1"})
 		md, ok := metadata.FromOutgoingContext(ctx)
 		require.Equal(t, true, ok, "Failed to read context metadata")
 		require.Equal(t, 1, md.Len(), "MetadataV0 contains wrong number of values")

api/jwt.go

@@ -1,9 +1,9 @@
 package api
 
 import (
+	"github.com/OffchainLabs/prysm/v6/crypto/rand"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/crypto/rand"
 )
 
 // GenerateRandomHexString generates a random hex string that follows the standards for jwt token

api/jwt_test.go

@@ -3,7 +3,7 @@ package api
 import (
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestGenerateRandomHexString(t *testing.T) {

api/pagination/BUILD.bazel

@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
     name = "go_default_library",
     srcs = ["pagination.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/pagination",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/pagination",
     visibility = ["//visibility:public"],
     deps = [
         "//config/params:go_default_library",

api/pagination/pagination.go

@@ -5,8 +5,8 @@ import (
 	"fmt"
 	"strconv"
 
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
 )
 
 // StartAndEndPage takes in the requested page token, wanted page size, total page size.

api/pagination/pagination_test.go

@@ -3,9 +3,9 @@ package pagination_test
 import (
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/api/pagination"
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/api/pagination"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestStartAndEndPage(t *testing.T) {

api/server/BUILD.bazel

@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
     name = "go_default_library",
     srcs = ["error.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/server",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/server",
     visibility = ["//visibility:public"],
 )
 

api/server/error.go

@@ -6,6 +6,11 @@ import (
 	"strings"
 )
 
+var (
+	ErrIndexedValidationFail = "One or more messages failed validation"
+	ErrIndexedBroadcastFail  = "One or more messages failed broadcast"
+)
+
 // DecodeError represents an error resulting from trying to decode an HTTP request.
 // It tracks the full field name for which decoding failed.
 type DecodeError struct {
@@ -29,19 +34,38 @@ func (e *DecodeError) Error() string {
 	return fmt.Sprintf("could not decode %s: %s", strings.Join(e.path, "."), e.err.Error())
 }
 
-// IndexedVerificationFailureError wraps a collection of verification failures.
-type IndexedVerificationFailureError struct {
-	Message  string                        `json:"message"`
-	Code     int                           `json:"code"`
-	Failures []*IndexedVerificationFailure `json:"failures"`
+// IndexedErrorContainer wraps a collection of indexed errors.
+type IndexedErrorContainer struct {
+	Message  string          `json:"message"`
+	Code     int             `json:"code"`
+	Failures []*IndexedError `json:"failures"`
 }
 
-func (e *IndexedVerificationFailureError) StatusCode() int {
+func (e *IndexedErrorContainer) StatusCode() int {
 	return e.Code
 }
 
-// IndexedVerificationFailure represents an issue when verifying a single indexed object e.g. an item in an array.
-type IndexedVerificationFailure struct {
+// IndexedError represents an issue when processing a single indexed object e.g. an item in an array.
+type IndexedError struct {
 	Index   int    `json:"index"`
 	Message string `json:"message"`
 }
+
+// BroadcastFailedError represents an error scenario where broadcasting a published message failed.
+type BroadcastFailedError struct {
+	msg string
+	err error
+}
+
+// NewBroadcastFailedError creates a new instance of BroadcastFailedError.
+func NewBroadcastFailedError(msg string, err error) *BroadcastFailedError {
+	return &BroadcastFailedError{
+		msg: msg,
+		err: err,
+	}
+}
+
+// Error returns the underlying error message.
+func (e *BroadcastFailedError) Error() string {
+	return fmt.Sprintf("could not broadcast %s: %s", e.msg, e.err.Error())
+}

api/server/error_test.go

@@ -4,7 +4,7 @@ import (
 	"errors"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
 )
 
 func TestDecodeError(t *testing.T) {

api/server/httprest/BUILD.bazel

@@ -7,7 +7,7 @@ go_library(
         "options.go",
         "server.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/server/httprest",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/server/httprest",
     visibility = ["//visibility:public"],
     deps = [
         "//api/server/middleware:go_default_library",

api/server/httprest/options.go

@@ -1,11 +1,10 @@
 package httprest
 
 import (
+	"net/http"
 	"time"
 
-	"net/http"
-
-	"github.com/prysmaticlabs/prysm/v5/api/server/middleware"
+	"github.com/OffchainLabs/prysm/v6/api/server/middleware"
 )
 
 // Option is a http rest server functional parameter type.

api/server/httprest/server.go

@@ -5,9 +5,9 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/api/server/middleware"
+	"github.com/OffchainLabs/prysm/v6/runtime"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api/server/middleware"
-	"github.com/prysmaticlabs/prysm/v5/runtime"
 )
 
 var _ runtime.Service = (*Server)(nil)

api/server/httprest/server_test.go

@@ -1,7 +1,6 @@
 package httprest
 
 import (
-	"context"
 	"flag"
 	"fmt"
 	"net"
@@ -10,9 +9,9 @@ import (
 	"net/url"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/cmd/beacon-chain/flags"
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/cmd/beacon-chain/flags"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"github.com/urfave/cli/v2"
 )
@@ -34,7 +33,7 @@ func TestServer_StartStop(t *testing.T) {
 		WithRouter(handler),
 	}
 
-	g, err := New(context.Background(), opts...)
+	g, err := New(t.Context(), opts...)
 	require.NoError(t, err)
 
 	g.Start()
@@ -62,7 +61,7 @@ func TestServer_NilHandler_NotFoundHandlerRegistered(t *testing.T) {
 		WithRouter(handler),
 	}
 
-	g, err := New(context.Background(), opts...)
+	g, err := New(t.Context(), opts...)
 	require.NoError(t, err)
 
 	writer := httptest.NewRecorder()

api/server/middleware/BUILD.bazel

@@ -6,9 +6,14 @@ go_library(
         "middleware.go",
         "util.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/server/middleware",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/server/middleware",
     visibility = ["//visibility:public"],
-    deps = ["@com_github_rs_cors//:go_default_library"],
+    deps = [
+        "//api:go_default_library",
+        "//api/apiutil:go_default_library",
+        "@com_github_rs_cors//:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
 )
 
 go_test(
@@ -22,5 +27,6 @@ go_test(
         "//api:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
     ],
 )

api/server/middleware/middleware.go

@@ -1,11 +1,15 @@
 package middleware
 
 import (
+	"compress/gzip"
 	"fmt"
 	"net/http"
 	"strings"
 
+	"github.com/OffchainLabs/prysm/v6/api"
+	"github.com/OffchainLabs/prysm/v6/api/apiutil"
 	"github.com/rs/cors"
+	log "github.com/sirupsen/logrus"
 )
 
 type Middleware func(http.Handler) http.Handler
@@ -71,47 +75,64 @@ func ContentTypeHandler(acceptedMediaTypes []string) Middleware {
 func AcceptHeaderHandler(serverAcceptedTypes []string) Middleware {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			acceptHeader := r.Header.Get("Accept")
-			// header is optional and should skip if not provided
-			if acceptHeader == "" {
+			if _, ok := apiutil.Negotiate(r.Header.Get("Accept"), serverAcceptedTypes); !ok {
+				http.Error(w, "Not Acceptable", http.StatusNotAcceptable)
+				return
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+// AcceptEncodingHeaderHandler compresses the response before sending it back to the client, if gzip is supported.
+func AcceptEncodingHeaderHandler() Middleware {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
 				next.ServeHTTP(w, r)
 				return
 			}
 
-			accepted := false
-			acceptTypes := strings.Split(acceptHeader, ",")
-			// follows rules defined in https://datatracker.ietf.org/doc/html/rfc2616#section-14.1
-			for _, acceptType := range acceptTypes {
-				acceptType = strings.TrimSpace(acceptType)
-				if acceptType == "*/*" {
-					accepted = true
-					break
+			gz := gzip.NewWriter(w)
+			gzipRW := &gzipResponseWriter{gz: gz, ResponseWriter: w}
+			defer func() {
+				if !gzipRW.zip {
+					return
 				}
-				for _, serverAcceptedType := range serverAcceptedTypes {
-					if strings.HasPrefix(acceptType, serverAcceptedType) {
-						accepted = true
-						break
-					}
-					if acceptType != "/*" && strings.HasSuffix(acceptType, "/*") && strings.HasPrefix(serverAcceptedType, acceptType[:len(acceptType)-2]) {
-						accepted = true
-						break
-					}
+				if err := gz.Close(); err != nil {
+					log.WithError(err).Error("Failed to close gzip writer")
 				}
-				if accepted {
-					break
-				}
-			}
+			}()
 
-			if !accepted {
-				http.Error(w, fmt.Sprintf("Not Acceptable: %s", acceptHeader), http.StatusNotAcceptable)
-				return
-			}
-
-			next.ServeHTTP(w, r)
+			next.ServeHTTP(gzipRW, r)
 		})
 	}
 }
 
+type gzipResponseWriter struct {
+	gz *gzip.Writer
+	http.ResponseWriter
+	zip bool
+}
+
+func (g *gzipResponseWriter) WriteHeader(statusCode int) {
+	if strings.Contains(g.Header().Get("Content-Type"), api.JsonMediaType) {
+		// Removing the current Content-Length because zipping will change it.
+		g.Header().Del("Content-Length")
+		g.Header().Set("Content-Encoding", "gzip")
+		g.zip = true
+	}
+
+	g.ResponseWriter.WriteHeader(statusCode)
+}
+
+func (g *gzipResponseWriter) Write(b []byte) (int, error) {
+	if g.zip {
+		return g.gz.Write(b)
+	}
+	return g.ResponseWriter.Write(b)
+}
+
 func MiddlewareChain(h http.Handler, mw []Middleware) http.Handler {
 	if len(mw) < 1 {
 		return h

api/server/middleware/middleware_test.go

@@ -1,14 +1,35 @@
 package middleware
 
 import (
+	"bytes"
+	"compress/gzip"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/api"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/api"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+	log "github.com/sirupsen/logrus"
 )
 
+// frozenHeaderRecorder allows asserting that response headers were not modified
+// after the call to WriteHeader.
+//
+// Its purpose is to have a regression test for https://github.com/OffchainLabs/prysm/pull/15499.
+type frozenHeaderRecorder struct {
+	*httptest.ResponseRecorder
+	frozenHeader http.Header
+}
+
+func (r *frozenHeaderRecorder) WriteHeader(code int) {
+	if r.frozenHeader != nil {
+		return
+	}
+	r.ResponseRecorder.WriteHeader(code)
+	r.frozenHeader = r.ResponseRecorder.Header().Clone()
+}
+
 func TestNormalizeQueryValuesHandler(t *testing.T) {
 	nextHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		_, err := w.Write([]byte("next handler"))
@@ -124,6 +145,90 @@ func TestContentTypeHandler(t *testing.T) {
 	}
 }
 
+func TestAcceptEncodingHeaderHandler(t *testing.T) {
+	dummyContent := "Test gzip middleware content"
+	nextHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", r.Header.Get("Accept"))
+		w.WriteHeader(http.StatusOK)
+		_, err := w.Write([]byte(dummyContent))
+		require.NoError(t, err)
+	})
+
+	handler := AcceptEncodingHeaderHandler()(nextHandler)
+
+	tests := []struct {
+		name             string
+		accept           string
+		acceptEncoding   string
+		expectCompressed bool
+	}{
+		{
+			name:             "Accept gzip",
+			accept:           api.JsonMediaType,
+			acceptEncoding:   "gzip",
+			expectCompressed: true,
+		},
+		{
+			name:             "Accept multiple encodings",
+			accept:           api.JsonMediaType,
+			acceptEncoding:   "deflate, gzip",
+			expectCompressed: true,
+		},
+		{
+			name:             "Accept unsupported encoding",
+			accept:           api.JsonMediaType,
+			acceptEncoding:   "deflate",
+			expectCompressed: false,
+		},
+		{
+			name:             "No accept encoding header",
+			accept:           api.JsonMediaType,
+			acceptEncoding:   "",
+			expectCompressed: false,
+		},
+		{
+			name:             "SSZ",
+			accept:           api.OctetStreamMediaType,
+			acceptEncoding:   "gzip",
+			expectCompressed: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req := httptest.NewRequest("GET", "/", nil)
+			req.Header.Set("Accept", tt.accept)
+			if tt.acceptEncoding != "" {
+				req.Header.Set("Accept-Encoding", tt.acceptEncoding)
+			}
+			rr := &frozenHeaderRecorder{ResponseRecorder: httptest.NewRecorder()}
+
+			handler.ServeHTTP(rr, req)
+
+			if tt.expectCompressed {
+				require.Equal(t, "gzip", rr.frozenHeader.Get("Content-Encoding"), "Expected Content-Encoding header to be 'gzip'")
+
+				compressedBody := rr.Body.Bytes()
+				require.NotEqual(t, dummyContent, string(compressedBody), "Response body should be compressed and differ from the original")
+
+				gzReader, err := gzip.NewReader(bytes.NewReader(compressedBody))
+				require.NoError(t, err, "Failed to create gzipReader")
+				defer func() {
+					if err := gzReader.Close(); err != nil {
+						log.WithError(err).Error("Failed to close gzip reader")
+					}
+				}()
+
+				decompressedBody, err := io.ReadAll(gzReader)
+				require.NoError(t, err, "Failed to decompress response body")
+				require.Equal(t, dummyContent, string(decompressedBody), "Decompressed content should match the original")
+			} else {
+				require.Equal(t, dummyContent, rr.Body.String(), "Response body should be uncompressed and match the original")
+			}
+		})
+	}
+}
+
 func TestAcceptHeaderHandler(t *testing.T) {
 	acceptedTypes := []string{"application/json", "application/octet-stream"}
 

api/server/middleware/util_test.go

@@ -3,8 +3,8 @@ package middleware
 import (
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestNormalizeQueryValues(t *testing.T) {

api/server/structs/BUILD.bazel

@@ -24,17 +24,19 @@ go_library(
         "other.go",
         "state.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/api/server/structs",
+    importpath = "github.com/OffchainLabs/prysm/v6/api/server/structs",
     visibility = ["//visibility:public"],
     deps = [
         "//api/server:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
+        "//consensus-types/blocks:go_default_library",
         "//consensus-types/interfaces:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//consensus-types/validator:go_default_library",
         "//container/slice:go_default_library",
+        "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//math:go_default_library",
         "//proto/engine/v1:go_default_library",
@@ -44,6 +46,7 @@ go_library(
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
+        "@org_golang_google_protobuf//proto:go_default_library",
     ],
 )
 
@@ -57,6 +60,7 @@ go_test(
     deps = [
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",

api/server/structs/conversions.go

@@ -4,20 +4,21 @@ import (
 	"fmt"
 	"strconv"
 
+	"github.com/OffchainLabs/prysm/v6/api/server"
+	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/validator"
+	"github.com/OffchainLabs/prysm/v6/container/slice"
+	"github.com/OffchainLabs/prysm/v6/crypto/bls"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/math"
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	ethv1 "github.com/OffchainLabs/prysm/v6/proto/eth/v1"
+	eth "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api/server"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/validator"
-	"github.com/prysmaticlabs/prysm/v5/container/slice"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v5/math"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethv1 "github.com/prysmaticlabs/prysm/v5/proto/eth/v1"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 )
 
 var errNilValue = errors.New("nil value")
@@ -699,6 +700,11 @@ func (m *SyncCommitteeMessage) ToConsensus() (*eth.SyncCommitteeMessage, error)
 	if err != nil {
 		return nil, server.NewDecodeError(err, "Signature")
 	}
+	// Add validation to check if the signature is valid BLS format
+	_, err = bls.SignatureFromBytes(sig)
+	if err != nil {
+		return nil, server.NewDecodeError(err, "Signature")
+	}
 
 	return &eth.SyncCommitteeMessage{
 		Slot:           primitives.Slot(slot),

api/server/structs/conversions_blob.go

@@ -3,9 +3,9 @@ package structs
 import (
 	"strconv"
 
-	"github.com/prysmaticlabs/prysm/v5/api/server"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/api/server"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	eth "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 )
 
 func (sc *Sidecar) ToConsensus() (*eth.BlobSidecar, error) {

api/server/structs/conversions_block.go

@@ -4,17 +4,17 @@ import (
 	"fmt"
 	"strconv"
 
+	"github.com/OffchainLabs/prysm/v6/api/server"
+	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/container/slice"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	eth "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api/server"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/container/slice"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 )
 
 var ErrUnsupportedConversion = errors.New("Could not determine api struct type to use for value")

api/server/structs/conversions_block_execution.go

@@ -4,15 +4,18 @@ import (
 	"fmt"
 	"strconv"
 
+	"github.com/OffchainLabs/prysm/v6/api/server"
+	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	consensusblocks "github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/container/slice"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/prysmaticlabs/prysm/v5/api/server"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/container/slice"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/proto"
 )
 
 // ----------------------------------------------------------------------------
@@ -132,6 +135,13 @@ func (e *ExecutionPayload) ToConsensus() (*enginev1.ExecutionPayload, error) {
 	}, nil
 }
 
+func (r *ExecutionPayload) PayloadProto() (proto.Message, error) {
+	if r == nil {
+		return nil, errors.Wrap(consensusblocks.ErrNilObject, "nil execution payload")
+	}
+	return r.ToConsensus()
+}
+
 func ExecutionPayloadHeaderFromConsensus(payload *enginev1.ExecutionPayloadHeader) (*ExecutionPayloadHeader, error) {
 	baseFeePerGas, err := sszBytesToUint256String(payload.BaseFeePerGas)
 	if err != nil {
@@ -383,6 +393,13 @@ func (e *ExecutionPayloadCapella) ToConsensus() (*enginev1.ExecutionPayloadCapel
 	}, nil
 }
 
+func (p *ExecutionPayloadCapella) PayloadProto() (proto.Message, error) {
+	if p == nil {
+		return nil, errors.Wrap(consensusblocks.ErrNilObject, "nil capella execution payload")
+	}
+	return p.ToConsensus()
+}
+
 func ExecutionPayloadHeaderCapellaFromConsensus(payload *enginev1.ExecutionPayloadHeaderCapella) (*ExecutionPayloadHeaderCapella, error) {
 	baseFeePerGas, err := sszBytesToUint256String(payload.BaseFeePerGas)
 	if err != nil {

api/server/structs/conversions_block_execution_test.go

@@ -4,10 +4,10 @@ import (
 	"fmt"
 	"testing"
 
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )
 
 func fillByteSlice(sliceLength int, value byte) []byte {

api/server/structs/conversions_lightclient.go

@@ -4,11 +4,11 @@ import (
 	"encoding/json"
 	"fmt"
 
+	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
+	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )
 
 func LightClientUpdateFromConsensus(update interfaces.LightClientUpdate) (*LightClientUpdate, error) {

api/server/structs/conversions_state.go

@@ -4,9 +4,9 @@ import (
 	"errors"
 	"fmt"
 
+	beaconState "github.com/OffchainLabs/prysm/v6/beacon-chain/state"
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	beaconState "github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
 )
 
 var errPayloadHeaderNotFound = errors.New("expected payload header not found")
@@ -26,10 +26,7 @@ func BeaconStateFromConsensus(st beaconState.BeaconState) (*BeaconState, error)
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -77,7 +74,7 @@ func BeaconStateFromConsensus(st beaconState.BeaconState) (*BeaconState, error)
 	}
 
 	return &BeaconState{
-		GenesisTime:                 fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                 fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:       hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                        fmt.Sprintf("%d", st.Slot()),
 		Fork:                        ForkFromConsensus(st.Fork()),
@@ -116,10 +113,7 @@ func BeaconStateAltairFromConsensus(st beaconState.BeaconState) (*BeaconStateAlt
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -183,7 +177,7 @@ func BeaconStateAltairFromConsensus(st beaconState.BeaconState) (*BeaconStateAlt
 	}
 
 	return &BeaconStateAltair{
-		GenesisTime:                 fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                 fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:       hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                        fmt.Sprintf("%d", st.Slot()),
 		Fork:                        ForkFromConsensus(st.Fork()),
@@ -225,10 +219,7 @@ func BeaconStateBellatrixFromConsensus(st beaconState.BeaconState) (*BeaconState
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -304,7 +295,7 @@ func BeaconStateBellatrixFromConsensus(st beaconState.BeaconState) (*BeaconState
 	}
 
 	return &BeaconStateBellatrix{
-		GenesisTime:                  fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                  fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:        hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                         fmt.Sprintf("%d", st.Slot()),
 		Fork:                         ForkFromConsensus(st.Fork()),
@@ -347,10 +338,7 @@ func BeaconStateCapellaFromConsensus(st beaconState.BeaconState) (*BeaconStateCa
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -442,7 +430,7 @@ func BeaconStateCapellaFromConsensus(st beaconState.BeaconState) (*BeaconStateCa
 	}
 
 	return &BeaconStateCapella{
-		GenesisTime:                  fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                  fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:        hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                         fmt.Sprintf("%d", st.Slot()),
 		Fork:                         ForkFromConsensus(st.Fork()),
@@ -488,10 +476,7 @@ func BeaconStateDenebFromConsensus(st beaconState.BeaconState) (*BeaconStateDene
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -583,7 +568,7 @@ func BeaconStateDenebFromConsensus(st beaconState.BeaconState) (*BeaconStateDene
 	}
 
 	return &BeaconStateDeneb{
-		GenesisTime:                  fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                  fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:        hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                         fmt.Sprintf("%d", st.Slot()),
 		Fork:                         ForkFromConsensus(st.Fork()),
@@ -629,10 +614,7 @@ func BeaconStateElectraFromConsensus(st beaconState.BeaconState) (*BeaconStateEl
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -760,7 +742,7 @@ func BeaconStateElectraFromConsensus(st beaconState.BeaconState) (*BeaconStateEl
 	}
 
 	return &BeaconStateElectra{
-		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:         hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                          fmt.Sprintf("%d", st.Slot()),
 		Fork:                          ForkFromConsensus(st.Fork()),
@@ -815,10 +797,7 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 	for i, r := range srcSr {
 		sr[i] = hexutil.Encode(r)
 	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
+	srcHr := st.HistoricalRoots()
 	hr := make([]string, len(srcHr))
 	for i, r := range srcHr {
 		hr[i] = hexutil.Encode(r)
@@ -944,9 +923,16 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 	if err != nil {
 		return nil, err
 	}
-
+	srcLookahead, err := st.ProposerLookahead()
+	if err != nil {
+		return nil, err
+	}
+	lookahead := make([]string, len(srcLookahead))
+	for i, v := range srcLookahead {
+		lookahead[i] = fmt.Sprintf("%d", uint64(v))
+	}
 	return &BeaconStateFulu{
-		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime()),
+		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime().Unix()),
 		GenesisValidatorsRoot:         hexutil.Encode(st.GenesisValidatorsRoot()),
 		Slot:                          fmt.Sprintf("%d", st.Slot()),
 		Fork:                          ForkFromConsensus(st.Fork()),
@@ -983,5 +969,6 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 		PendingDeposits:               PendingDepositsFromConsensus(pbd),
 		PendingPartialWithdrawals:     PendingPartialWithdrawalsFromConsensus(ppw),
 		PendingConsolidations:         PendingConsolidationsFromConsensus(pc),
+		ProposerLookahead:             lookahead,
 	}, nil
 }

api/server/structs/conversions_test.go

@@ -3,8 +3,10 @@ package structs
 import (
 	"testing"
 
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	eth "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 )
 
 func TestDepositSnapshotFromConsensus(t *testing.T) {
@@ -102,12 +104,266 @@ func TestProposerSlashing_ToConsensus(t *testing.T) {
 	require.ErrorContains(t, errNilValue.Error(), err)
 }
 
+func TestProposerSlashing_FromConsensus(t *testing.T) {
+	input := []*eth.ProposerSlashing{
+		{
+			Header_1: &eth.SignedBeaconBlockHeader{
+				Header: &eth.BeaconBlockHeader{
+					Slot:          1,
+					ProposerIndex: 2,
+					ParentRoot:    []byte{3},
+					StateRoot:     []byte{4},
+					BodyRoot:      []byte{5},
+				},
+				Signature: []byte{6},
+			},
+			Header_2: &eth.SignedBeaconBlockHeader{
+				Header: &eth.BeaconBlockHeader{
+					Slot:          7,
+					ProposerIndex: 8,
+					ParentRoot:    []byte{9},
+					StateRoot:     []byte{10},
+					BodyRoot:      []byte{11},
+				},
+				Signature: []byte{12},
+			},
+		},
+		{
+			Header_1: &eth.SignedBeaconBlockHeader{
+				Header: &eth.BeaconBlockHeader{
+					Slot:          13,
+					ProposerIndex: 14,
+					ParentRoot:    []byte{15},
+					StateRoot:     []byte{16},
+					BodyRoot:      []byte{17},
+				},
+				Signature: []byte{18},
+			},
+			Header_2: &eth.SignedBeaconBlockHeader{
+				Header: &eth.BeaconBlockHeader{
+					Slot:          19,
+					ProposerIndex: 20,
+					ParentRoot:    []byte{21},
+					StateRoot:     []byte{22},
+					BodyRoot:      []byte{23},
+				},
+				Signature: []byte{24},
+			},
+		},
+	}
+
+	expectedResult := []*ProposerSlashing{
+		{
+			SignedHeader1: &SignedBeaconBlockHeader{
+				Message: &BeaconBlockHeader{
+					Slot:          "1",
+					ProposerIndex: "2",
+					ParentRoot:    hexutil.Encode([]byte{3}),
+					StateRoot:     hexutil.Encode([]byte{4}),
+					BodyRoot:      hexutil.Encode([]byte{5}),
+				},
+				Signature: hexutil.Encode([]byte{6}),
+			},
+			SignedHeader2: &SignedBeaconBlockHeader{
+				Message: &BeaconBlockHeader{
+					Slot:          "7",
+					ProposerIndex: "8",
+					ParentRoot:    hexutil.Encode([]byte{9}),
+					StateRoot:     hexutil.Encode([]byte{10}),
+					BodyRoot:      hexutil.Encode([]byte{11}),
+				},
+				Signature: hexutil.Encode([]byte{12}),
+			},
+		},
+		{
+			SignedHeader1: &SignedBeaconBlockHeader{
+				Message: &BeaconBlockHeader{
+					Slot:          "13",
+					ProposerIndex: "14",
+					ParentRoot:    hexutil.Encode([]byte{15}),
+					StateRoot:     hexutil.Encode([]byte{16}),
+					BodyRoot:      hexutil.Encode([]byte{17}),
+				},
+				Signature: hexutil.Encode([]byte{18}),
+			},
+			SignedHeader2: &SignedBeaconBlockHeader{
+				Message: &BeaconBlockHeader{
+					Slot:          "19",
+					ProposerIndex: "20",
+					ParentRoot:    hexutil.Encode([]byte{21}),
+					StateRoot:     hexutil.Encode([]byte{22}),
+					BodyRoot:      hexutil.Encode([]byte{23}),
+				},
+				Signature: hexutil.Encode([]byte{24}),
+			},
+		},
+	}
+
+	result := ProposerSlashingsFromConsensus(input)
+	assert.DeepEqual(t, expectedResult, result)
+}
+
 func TestAttesterSlashing_ToConsensus(t *testing.T) {
 	a := &AttesterSlashing{Attestation1: nil, Attestation2: nil}
 	_, err := a.ToConsensus()
 	require.ErrorContains(t, errNilValue.Error(), err)
 }
 
+func TestAttesterSlashing_FromConsensus(t *testing.T) {
+	input := []*eth.AttesterSlashing{
+		{
+			Attestation_1: &eth.IndexedAttestation{
+				AttestingIndices: []uint64{1, 2},
+				Data: &eth.AttestationData{
+					Slot:            3,
+					CommitteeIndex:  4,
+					BeaconBlockRoot: []byte{5},
+					Source: &eth.Checkpoint{
+						Epoch: 6,
+						Root:  []byte{7},
+					},
+					Target: &eth.Checkpoint{
+						Epoch: 8,
+						Root:  []byte{9},
+					},
+				},
+				Signature: []byte{10},
+			},
+			Attestation_2: &eth.IndexedAttestation{
+				AttestingIndices: []uint64{11, 12},
+				Data: &eth.AttestationData{
+					Slot:            13,
+					CommitteeIndex:  14,
+					BeaconBlockRoot: []byte{15},
+					Source: &eth.Checkpoint{
+						Epoch: 16,
+						Root:  []byte{17},
+					},
+					Target: &eth.Checkpoint{
+						Epoch: 18,
+						Root:  []byte{19},
+					},
+				},
+				Signature: []byte{20},
+			},
+		},
+		{
+			Attestation_1: &eth.IndexedAttestation{
+				AttestingIndices: []uint64{21, 22},
+				Data: &eth.AttestationData{
+					Slot:            23,
+					CommitteeIndex:  24,
+					BeaconBlockRoot: []byte{25},
+					Source: &eth.Checkpoint{
+						Epoch: 26,
+						Root:  []byte{27},
+					},
+					Target: &eth.Checkpoint{
+						Epoch: 28,
+						Root:  []byte{29},
+					},
+				},
+				Signature: []byte{30},
+			},
+			Attestation_2: &eth.IndexedAttestation{
+				AttestingIndices: []uint64{31, 32},
+				Data: &eth.AttestationData{
+					Slot:            33,
+					CommitteeIndex:  34,
+					BeaconBlockRoot: []byte{35},
+					Source: &eth.Checkpoint{
+						Epoch: 36,
+						Root:  []byte{37},
+					},
+					Target: &eth.Checkpoint{
+						Epoch: 38,
+						Root:  []byte{39},
+					},
+				},
+				Signature: []byte{40},
+			},
+		},
+	}
+
+	expectedResult := []*AttesterSlashing{
+		{
+			Attestation1: &IndexedAttestation{
+				AttestingIndices: []string{"1", "2"},
+				Data: &AttestationData{
+					Slot:            "3",
+					CommitteeIndex:  "4",
+					BeaconBlockRoot: hexutil.Encode([]byte{5}),
+					Source: &Checkpoint{
+						Epoch: "6",
+						Root:  hexutil.Encode([]byte{7}),
+					},
+					Target: &Checkpoint{
+						Epoch: "8",
+						Root:  hexutil.Encode([]byte{9}),
+					},
+				},
+				Signature: hexutil.Encode([]byte{10}),
+			},
+			Attestation2: &IndexedAttestation{
+				AttestingIndices: []string{"11", "12"},
+				Data: &AttestationData{
+					Slot:            "13",
+					CommitteeIndex:  "14",
+					BeaconBlockRoot: hexutil.Encode([]byte{15}),
+					Source: &Checkpoint{
+						Epoch: "16",
+						Root:  hexutil.Encode([]byte{17}),
+					},
+					Target: &Checkpoint{
+						Epoch: "18",
+						Root:  hexutil.Encode([]byte{19}),
+					},
+				},
+				Signature: hexutil.Encode([]byte{20}),
+			},
+		},
+		{
+			Attestation1: &IndexedAttestation{
+				AttestingIndices: []string{"21", "22"},
+				Data: &AttestationData{
+					Slot:            "23",
+					CommitteeIndex:  "24",
+					BeaconBlockRoot: hexutil.Encode([]byte{25}),
+					Source: &Checkpoint{
+						Epoch: "26",
+						Root:  hexutil.Encode([]byte{27}),
+					},
+					Target: &Checkpoint{
+						Epoch: "28",
+						Root:  hexutil.Encode([]byte{29}),
+					},
+				},
+				Signature: hexutil.Encode([]byte{30}),
+			},
+			Attestation2: &IndexedAttestation{
+				AttestingIndices: []string{"31", "32"},
+				Data: &AttestationData{
+					Slot:            "33",
+					CommitteeIndex:  "34",
+					BeaconBlockRoot: hexutil.Encode([]byte{35}),
+					Source: &Checkpoint{
+						Epoch: "36",
+						Root:  hexutil.Encode([]byte{37}),
+					},
+					Target: &Checkpoint{
+						Epoch: "38",
+						Root:  hexutil.Encode([]byte{39}),
+					},
+				},
+				Signature: hexutil.Encode([]byte{40}),
+			},
+		},
+	}
+
+	result := AttesterSlashingsFromConsensus(input)
+	assert.DeepEqual(t, expectedResult, result)
+}
+
 func TestIndexedAttestation_ToConsensus(t *testing.T) {
 	a := &IndexedAttestation{
 		AttestingIndices: []string{"1"},

api/server/structs/endpoints_beacon.go

@@ -78,8 +78,8 @@ type GetBlockHeaderResponse struct {
 }
 
 type GetValidatorsRequest struct {
-	Ids      []string `json:"ids"`
-	Statuses []string `json:"statuses"`
+	Ids      []string `json:"ids,omitempty"`
+	Statuses []string `json:"statuses,omitempty"`
 }
 
 type GetValidatorsResponse struct {
@@ -100,6 +100,12 @@ type GetValidatorBalancesResponse struct {
 	Data                []*ValidatorBalance `json:"data"`
 }
 
+type GetValidatorIdentitiesResponse struct {
+	ExecutionOptimistic bool                 `json:"execution_optimistic"`
+	Finalized           bool                 `json:"finalized"`
+	Data                []*ValidatorIdentity `json:"data"`
+}
+
 type ValidatorContainer struct {
 	Index     string     `json:"index"`
 	Balance   string     `json:"balance"`
@@ -112,6 +118,12 @@ type ValidatorBalance struct {
 	Balance string `json:"balance"`
 }
 
+type ValidatorIdentity struct {
+	Index           string `json:"index"`
+	Pubkey          string `json:"pubkey"`
+	ActivationEpoch string `json:"activation_epoch"`
+}
+
 type GetBlockResponse struct {
 	Data *SignedBlock `json:"data"`
 }
@@ -251,6 +263,13 @@ type ChainHead struct {
 	OptimisticStatus           bool   `json:"optimistic_status"`
 }
 
+type GetPendingConsolidationsResponse struct {
+	Version             string                  `json:"version"`
+	ExecutionOptimistic bool                    `json:"execution_optimistic"`
+	Finalized           bool                    `json:"finalized"`
+	Data                []*PendingConsolidation `json:"data"`
+}
+
 type GetPendingDepositsResponse struct {
 	Version             string            `json:"version"`
 	ExecutionOptimistic bool              `json:"execution_optimistic"`
@@ -264,3 +283,16 @@ type GetPendingPartialWithdrawalsResponse struct {
 	Finalized           bool                        `json:"finalized"`
 	Data                []*PendingPartialWithdrawal `json:"data"`
 }
+
+type GetProposerLookaheadResponse struct {
+	Version             string   `json:"version"`
+	ExecutionOptimistic bool     `json:"execution_optimistic"`
+	Finalized           bool     `json:"finalized"`
+	Data                []string `json:"data"` // validator indexes
+}
+
+type GetBlobsResponse struct {
+	ExecutionOptimistic bool     `json:"execution_optimistic"`
+	Finalized           bool     `json:"finalized"`
+	Data                []string `json:"data"` //blobs
+}

api/server/structs/endpoints_debug.go

@@ -54,4 +54,21 @@ type ForkChoiceNodeExtraData struct {
 	Balance                  string `json:"balance"`
 	ExecutionOptimistic      bool   `json:"execution_optimistic"`
 	TimeStamp                string `json:"timestamp"`
+	Target                   string `json:"target"`
+}
+
+type GetDebugDataColumnSidecarsResponse struct {
+	Version             string               `json:"version"`
+	ExecutionOptimistic bool                 `json:"execution_optimistic"`
+	Finalized           bool                 `json:"finalized"`
+	Data                []*DataColumnSidecar `json:"data"`
+}
+
+type DataColumnSidecar struct {
+	Index                        string                   `json:"index"`
+	Column                       []string                 `json:"column"`
+	KzgCommitments               []string                 `json:"kzg_commitments"`
+	KzgProofs                    []string                 `json:"kzg_proofs"`
+	SignedBeaconBlockHeader      *SignedBeaconBlockHeader `json:"signed_block_header"`
+	KzgCommitmentsInclusionProof []string                 `json:"kzg_commitments_inclusion_proof"`
 }

api/server/structs/endpoints_events.go

@@ -20,6 +20,18 @@ type BlockEvent struct {
 	ExecutionOptimistic bool   `json:"execution_optimistic"`
 }
 
+type BlockGossipEvent struct {
+	Slot  string `json:"slot"`
+	Block string `json:"block"`
+}
+
+type DataColumnGossipEvent struct {
+	Slot           string   `json:"slot"`
+	Index          string   `json:"index"`
+	BlockRoot      string   `json:"block_root"`
+	KzgCommitments []string `json:"kzg_commitments"`
+}
+
 type AggregatedAttEventSource struct {
 	Aggregate *Attestation `json:"aggregate"`
 }

api/server/structs/endpoints_node.go

@@ -27,14 +27,22 @@ type Identity struct {
 type Metadata struct {
 	SeqNumber string `json:"seq_number"`
 	Attnets   string `json:"attnets"`
+	Syncnets  string `json:"syncnets,omitempty"`
+	Cgc       string `json:"custody_group_count,omitempty"`
 }
 
 type GetPeerResponse struct {
 	Data *Peer `json:"data"`
 }
 
+// Added Meta to align with beacon-api: https://ethereum.github.io/beacon-APIs/#/Node/getPeers
+type Meta struct {
+	Count int `json:"count"`
+}
+
 type GetPeersResponse struct {
 	Data []*Peer `json:"data"`
+	Meta Meta    `json:"meta"`
 }
 
 type Peer struct {

api/server/structs/endpoints_validator.go

@@ -3,7 +3,7 @@ package structs
 import (
 	"encoding/json"
 
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 )
 
 type AggregateAttestationResponse struct {

api/server/structs/other.go

@@ -253,7 +253,7 @@ type PendingDeposit struct {
 }
 
 type PendingPartialWithdrawal struct {
-	Index             string `json:"index"`
+	Index             string `json:"validator_index"`
 	Amount            string `json:"amount"`
 	WithdrawableEpoch string `json:"withdrawable_epoch"`
 }

api/server/structs/state.go

@@ -219,4 +219,5 @@ type BeaconStateFulu struct {
 	PendingDeposits               []*PendingDeposit            `json:"pending_deposits"`
 	PendingPartialWithdrawals     []*PendingPartialWithdrawal  `json:"pending_partial_withdrawals"`
 	PendingConsolidations         []*PendingConsolidation      `json:"pending_consolidations"`
+	ProposerLookahead             []string                     `json:"proposer_lookahead"`
 }

async/BUILD.bazel

@@ -8,7 +8,7 @@ go_library(
         "multilock.go",
         "scatter.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/async",
+    importpath = "github.com/OffchainLabs/prysm/v6/async",
     visibility = ["//visibility:public"],
     deps = ["@com_github_sirupsen_logrus//:go_default_library"],
 )

async/abool/BUILD.bazel

@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
     name = "go_default_library",
     srcs = ["abool.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v5/async/abool",
+    importpath = "github.com/OffchainLabs/prysm/v6/async/abool",
     visibility = ["//visibility:public"],
 )
 

async/benchmark_test.go

@@ -6,8 +6,8 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/async"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/async"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 	log "github.com/sirupsen/logrus"
 )
 

async/debounce_test.go

@@ -7,15 +7,15 @@ import (
 	"testing"
 	"time"
 
-	"github.com/prysmaticlabs/prysm/v5/async"
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-	"github.com/prysmaticlabs/prysm/v5/testing/util"
+	"github.com/OffchainLabs/prysm/v6/async"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/util"
 )
 
 func TestDebounce_NoEvents(t *testing.T) {
 	eventsChan := make(chan interface{}, 100)
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(t.Context())
 	interval := time.Second
 	timesHandled := int32(0)
 	wg := &sync.WaitGroup{}
@@ -39,7 +39,7 @@ func TestDebounce_NoEvents(t *testing.T) {
 
 func TestDebounce_CtxClosing(t *testing.T) {
 	eventsChan := make(chan interface{}, 100)
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(t.Context())
 	interval := time.Second
 	timesHandled := int32(0)
 	wg := &sync.WaitGroup{}
@@ -75,7 +75,7 @@ func TestDebounce_CtxClosing(t *testing.T) {
 
 func TestDebounce_SingleHandlerInvocation(t *testing.T) {
 	eventsChan := make(chan interface{}, 100)
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(t.Context())
 	interval := time.Second
 	timesHandled := int32(0)
 	go async.Debounce(ctx, interval, eventsChan, func(event interface{}) {
@@ -93,7 +93,7 @@ func TestDebounce_SingleHandlerInvocation(t *testing.T) {
 
 func TestDebounce_MultipleHandlerInvocation(t *testing.T) {
 	eventsChan := make(chan interface{}, 100)
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(t.Context())
 	interval := time.Second
 	timesHandled := int32(0)
 	go async.Debounce(ctx, interval, eventsChan, func(event interface{}) {

async/event/BUILD.bazel

@@ -7,7 +7,7 @@ go_library(
         "interface.go",
         "subscription.go",
     ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/async/event",
+    importpath = "github.com/OffchainLabs/prysm/v6/async/event",
     visibility = ["//visibility:public"],
     deps = [
         "//time/mclock:go_default_library",

async/event/example_scope_test.go

@@ -20,7 +20,7 @@ import (
 	"fmt"
 	"sync"
 
-	"github.com/prysmaticlabs/prysm/v5/async/event"
+	"github.com/OffchainLabs/prysm/v6/async/event"
 )
 
 // This example demonstrates how SubscriptionScope can be used to control the lifetime of

async/event/example_subscription_test.go

@@ -19,7 +19,7 @@ package event_test
 import (
 	"fmt"
 
-	"github.com/prysmaticlabs/prysm/v5/async/event"
+	"github.com/OffchainLabs/prysm/v6/async/event"
 )
 
 func ExampleNewSubscription() {

async/event/subscription.go

@@ -21,7 +21,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/prysmaticlabs/prysm/v5/time/mclock"
+	"github.com/OffchainLabs/prysm/v6/time/mclock"
 )
 
 // waitQuotient is divided against the max backoff time, in order to have N requests based on the full
@@ -154,7 +154,7 @@ retry:
 				continue retry
 			}
 			if sub == nil {
-				panic("event: ResubscribeFunc returned nil subscription and no error")
+				panic("event: ResubscribeFunc returned nil subscription and no error") // lint:nopanic -- This should never happen.
 			}
 			return sub
 		case <-s.unsub:

async/event/subscription_test.go

@@ -23,7 +23,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 var errInts = errors.New("error in subscribeInts")

async/every.go

@@ -19,10 +19,10 @@ func RunEvery(ctx context.Context, period time.Duration, f func()) {
 		for {
 			select {
 			case <-ticker.C:
-				log.WithField("function", funcName).Trace("running")
+				log.WithField("function", funcName).Trace("Running")
 				f()
 			case <-ctx.Done():
-				log.WithField("function", funcName).Debug("context is closed, exiting")
+				log.WithField("function", funcName).Debug("Context is closed, exiting")
 				ticker.Stop()
 				return
 			}

async/every_test.go

@@ -6,11 +6,11 @@ import (
 	"testing"
 	"time"
 
-	"github.com/prysmaticlabs/prysm/v5/async"
+	"github.com/OffchainLabs/prysm/v6/async"
 )
 
 func TestEveryRuns(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(t.Context())
 
 	i := int32(0)
 	async.RunEvery(ctx, 100*time.Millisecond, func() {

async/scatter_test.go

@@ -5,9 +5,9 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/prysmaticlabs/prysm/v5/async"
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/OffchainLabs/prysm/v6/async"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
 )
 
 func TestDouble(t *testing.T) {

beacon-chain/README.md

@@ -4,6 +4,6 @@ This is the main project folder for the beacon chain implementation of Ethereum
 
 You can also read our main [README](https://github.com/prysmaticlabs/prysm/blob/master/README.md) and join our active chat room on Discord.
 
-[![Discord](https://user-images.githubusercontent.com/7288322/34471967-1df7808a-efbb-11e7-9088-ed0b04151291.png)](https://discord.gg/CTYGPUJ)
+[![Discord](https://user-images.githubusercontent.com/7288322/34471967-1df7808a-efbb-11e7-9088-ed0b04151291.png)](https://discord.gg/prysm)
 
 Also, read the official beacon chain [specification](https://github.com/ethereum/consensus-specs/blob/master/specs/phase0/beacon-chain.md), this design spec serves as a source of truth for the beacon chain implementation we follow at Prysmatic Labs.