RefreshPersistentSubnets Officialise hack.

Fix tests
2026-04-19 03:01:06 -04:00 · 2025-04-08 16:25:29 +02:00 · 2025-04-08 16:13:44 +02:00 · 2025-04-08 15:46:25 +02:00 · 2025-04-08 14:25:19 +02:00 · 2025-04-08 11:55:54 +02:00
4100 changed files with 91757 additions and 454348 deletions
--- a/.bazelrc
+++ b/.bazelrc
@@ -22,6 +22,7 @@ coverage --define=coverage_enabled=1
 build --workspace_status_command=./hack/workspace_status.sh

 build --define blst_disabled=false
+build --compilation_mode=opt
 run --define blst_disabled=false

 build:blst_disabled --define blst_disabled=true
@@ -34,7 +35,6 @@ 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
--- a/.buildkite-bazelrc
+++ b/.buildkite-bazelrc
@@ -50,7 +50,7 @@ build:nostamp --nostamp

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

 # Buildbuddy
--- a/.deepsource.toml
+++ b/.deepsource.toml
@@ -11,7 +11,7 @@ name = "go"
 enabled = true

 [analyzers.meta]
-import_paths = ["github.com/OffchainLabs/prysm/v7"]
+import_paths = ["github.com/prysmaticlabs/prysm/v5"]

 [[analyzers]]
 name = "test-coverage"
--- a/.ethspecify.yml
+++ b/.ethspecify.yml
@@ -1,416 +0,0 @@
-version: v1.7.0-alpha.2
-style: full
-
-specrefs:
-  search_root: .
-  auto_standardize_names: true
-  auto_add_missing_entries: true
-  require_exceptions_have_fork: true
-
-  files:
-    - specrefs/configs.yml
-    - specrefs/constants.yml
-    - specrefs/containers.yml
-    - specrefs/dataclasses.yml
-    - specrefs/functions.yml
-    - specrefs/presets.yml
-
-exceptions:
-  presets:
-    # gloas
-    - BUILDER_PENDING_WITHDRAWALS_LIMIT#gloas
-    - MAX_PAYLOAD_ATTESTATIONS#gloas
-    - PTC_SIZE#gloas
-
-  constants:
-    # phase0
-    - BASIS_POINTS#phase0
-    - ENDIANNESS#phase0
-    - MAX_CONCURRENT_REQUESTS#phase0
-    - UINT64_MAX#phase0
-    - UINT64_MAX_SQRT#phase0
-    # altair
-    - PARTICIPATION_FLAG_WEIGHTS#altair
-    # bellatrix
-    - SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY#bellatrix
-    # deneb
-    - BLS_MODULUS#deneb
-    - BYTES_PER_COMMITMENT#deneb
-    - BYTES_PER_FIELD_ELEMENT#deneb
-    - BYTES_PER_PROOF#deneb
-    - FIAT_SHAMIR_PROTOCOL_DOMAIN#deneb
-    - G1_POINT_AT_INFINITY#deneb
-    - G2_POINT_AT_INFINITY#deneb
-    - KZG_ENDIANNESS#deneb
-    - KZG_SETUP_G2_LENGTH#deneb
-    - KZG_SETUP_G2_MONOMIAL#deneb
-    - PRIMITIVE_ROOT_OF_UNITY#deneb
-    - RANDOM_CHALLENGE_KZG_BATCH_DOMAIN#deneb
-    - RANDOM_CHALLENGE_KZG_CELL_BATCH_DOMAIN#fulu
-    # fulu
-    - UINT256_MAX#fulu
-    # gloas
-    - BUILDER_PAYMENT_THRESHOLD_DENOMINATOR#gloas
-    - BUILDER_PAYMENT_THRESHOLD_NUMERATOR#gloas
-    - BUILDER_WITHDRAWAL_PREFIX#gloas
-    - DOMAIN_BEACON_BUILDER#gloas
-    - DOMAIN_PTC_ATTESTER#gloas
-    - PAYLOAD_STATUS_EMPTY#gloas
-    - PAYLOAD_STATUS_FULL#gloas
-    - PAYLOAD_STATUS_PENDING#gloas
-    - ATTESTATION_TIMELINESS_INDEX#gloas
-    - BUILDER_INDEX_FLAG#gloas
-    - BUILDER_INDEX_SELF_BUILD#gloas
-    - NUM_BLOCK_TIMELINESS_DEADLINES#gloas
-    - PTC_TIMELINESS_INDEX#gloas
-
-  configs:
-    # gloas
-    - AGGREGATE_DUE_BPS_GLOAS#gloas
-    - ATTESTATION_DUE_BPS_GLOAS#gloas
-    - CONTRIBUTION_DUE_BPS_GLOAS#gloas
-    - GLOAS_FORK_EPOCH#gloas
-    - GLOAS_FORK_VERSION#gloas
-    - SYNC_MESSAGE_DUE_BPS_GLOAS#gloas
-
-  ssz_objects:
-    # phase0
-    - Eth1Block#phase0
-    # capella
-    - LightClientBootstrap#capella
-    - LightClientFinalityUpdate#capella
-    - LightClientOptimisticUpdate#capella
-    - LightClientUpdate#capella
-    # fulu
-    - MatrixEntry#fulu
-    # gloas
-    - BeaconBlockBody#gloas
-    - BeaconState#gloas
-    - Builder#gloas
-    - BuilderPendingPayment#gloas
-    - BuilderPendingWithdrawal#gloas
-    - DataColumnSidecar#gloas
-    - ExecutionPayloadBid#gloas
-    - ExecutionPayloadEnvelope#gloas
-    - ForkChoiceNode#gloas
-    - IndexedPayloadAttestation#gloas
-    - PayloadAttestation#gloas
-    - PayloadAttestationData#gloas
-    - PayloadAttestationMessage#gloas
-    - ProposerPreferences#gloas
-    - SignedExecutionPayloadBid#gloas
-    - SignedExecutionPayloadEnvelope#gloas
-    - SignedProposerPreferences#gloas
-
-  dataclasses:
-    # phase0
-    - LatestMessage#phase0
-    - Store#phase0
-    # altair
-    - LightClientStore#altair
-    # bellatrix
-    - OptimisticStore#bellatrix
-    # capella
-    - ExpectedWithdrawals#capella
-    - LightClientStore#capella
-    # electra
-    - ExpectedWithdrawals#electra
-    # fulu
-    - BlobParameters#fulu
-    # gloas
-    - ExpectedWithdrawals#gloas
-    - LatestMessage#gloas
-    - Store#gloas
-
-  functions:
-    # Functions implemented by KZG library for EIP-4844
-    - bit_reversal_permutation#deneb
-    - blob_to_kzg_commitment#deneb
-    - blob_to_polynomial#deneb
-    - bls_field_to_bytes#deneb
-    - bytes_to_bls_field#deneb
-    - bytes_to_kzg_commitment#deneb
-    - bytes_to_kzg_proof#deneb
-    - compute_blob_kzg_proof#deneb
-    - compute_challenge#deneb
-    - compute_kzg_proof#deneb
-    - compute_kzg_proof_impl#deneb
-    - compute_powers#deneb
-    - compute_quotient_eval_within_domain#deneb
-    - compute_roots_of_unity#deneb
-    - evaluate_polynomial_in_evaluation_form#deneb
-    - g1_lincomb#deneb
-    - hash_to_bls_field#deneb
-    - is_power_of_two#deneb
-    - reverse_bits#deneb
-    - validate_kzg_g1#deneb
-    - verify_blob_kzg_proof#deneb
-    - verify_blob_kzg_proof_batch#deneb
-    - verify_kzg_proof#deneb
-    - verify_kzg_proof_batch#deneb
-    - verify_kzg_proof_impl#deneb
-
-    # Functions implemented by KZG library for EIP-7594
-    - _fft_field#fulu
-    - add_polynomialcoeff#fulu
-    - cell_to_coset_evals#fulu
-    - compute_cells#fulu
-    - compute_cells_and_kzg_proofs#fulu
-    - compute_cells_and_kzg_proofs_polynomialcoeff#fulu
-    - compute_kzg_proof_multi_impl#fulu
-    - compute_verify_cell_kzg_proof_batch_challenge#fulu
-    - construct_vanishing_polynomial#fulu
-    - coset_evals_to_cell#fulu
-    - coset_fft_field#fulu
-    - coset_for_cell#fulu
-    - coset_shift_for_cell#fulu
-    - divide_polynomialcoeff#fulu
-    - evaluate_polynomialcoeff#fulu
-    - fft_field#fulu
-    - interpolate_polynomialcoeff#fulu
-    - multiply_polynomialcoeff#fulu
-    - polynomial_eval_to_coeff#fulu
-    - recover_cells_and_kzg_proofs#fulu
-    - recover_polynomialcoeff#fulu
-    - vanishing_polynomialcoeff#fulu
-    - verify_cell_kzg_proof_batch#fulu
-    - verify_cell_kzg_proof_batch_impl#fulu
-
-    # phase0
-    - update_proposer_boost_root#phase0
-    - is_proposer_equivocation#phase0
-    - record_block_timeliness#phase0
-    - compute_proposer_score#phase0
-    - get_attestation_score#phase0
-    - calculate_committee_fraction#phase0
-    - compute_fork_version#phase0
-    - compute_pulled_up_tip#phase0
-    - filter_block_tree#phase0
-    - get_aggregate_and_proof#phase0
-    - get_aggregate_due_ms#phase0
-    - get_attestation_component_deltas#phase0
-    - get_attestation_due_ms#phase0
-    - get_attesting_balance#phase0
-    - get_base_reward#phase0
-    - get_checkpoint_block#phase0
-    - get_current_store_epoch#phase0
-    - get_eligible_validator_indices#phase0
-    - get_epoch_signature#phase0
-    - get_eth1_vote#phase0
-    - get_filtered_block_tree#phase0
-    - get_forkchoice_store#phase0
-    - get_matching_head_attestations#phase0
-    - get_matching_source_attestations#phase0
-    - get_matching_target_attestations#phase0
-    - get_proposer_head#phase0
-    - get_proposer_reorg_cutoff_ms#phase0
-    - get_proposer_score#phase0
-    - get_slot_component_duration_ms#phase0
-    - get_slot_signature#phase0
-    - get_unslashed_attesting_indices#phase0
-    - get_voting_source#phase0
-    - is_candidate_block#phase0
-    - is_ffg_competitive#phase0
-    - is_finalization_ok#phase0
-    - is_head_late#phase0
-    - is_head_weak#phase0
-    - is_parent_strong#phase0
-    - is_proposer#phase0
-    - is_proposing_on_time#phase0
-    - is_shuffling_stable#phase0
-    - is_valid_merkle_branch#phase0
-    - on_tick#phase0
-    - on_tick_per_slot#phase0
-    - seconds_to_milliseconds#phase0
-    - store_target_checkpoint_state#phase0
-    - update_latest_messages#phase0
-    - validate_on_attestation#phase0
-    - validate_target_epoch_against_current_time#phase0
-    - xor#phase0
-    # altair
-    - compute_merkle_proof#altair
-    - compute_sync_committee_period_at_slot#altair
-    - get_contribution_and_proof#altair
-    - get_contribution_due_ms#altair
-    - get_index_for_new_validator#altair
-    - get_safety_threshold#altair
-    - get_subtree_index#altair
-    - get_sync_committee_message#altair
-    - get_sync_committee_selection_proof#altair
-    - get_sync_message_due_ms#altair
-    - get_unslashed_participating_indices#altair
-    - is_assigned_to_sync_committee#altair
-    - is_finality_update#altair
-    - is_next_sync_committee_known#altair
-    - is_valid_light_client_header#altair
-    - is_valid_normalized_merkle_branch#altair
-    - process_light_client_store_force_update#altair
-    - process_light_client_update#altair
-    - process_sync_committee_contributions#altair
-    - set_or_append_list#altair
-    - validate_light_client_update#altair
-    # bellatrix
-    - get_execution_payload#bellatrix
-    - is_merge_transition_block#bellatrix
-    - is_optimistic_candidate_block#bellatrix
-    - latest_verified_ancestor#bellatrix
-    - prepare_execution_payload#bellatrix
-    # capella
-    - apply_withdrawals#capella
-    - get_balance_after_withdrawals#capella
-    - get_lc_execution_root#capella
-    - get_validators_sweep_withdrawals#capella
-    - is_valid_light_client_header#capella
-    - prepare_execution_payload#capella
-    - process_epoch#capella
-    - update_next_withdrawal_index#capella
-    - update_next_withdrawal_validator_index#capella
-    - upgrade_lc_bootstrap_to_capella#capella
-    - upgrade_lc_finality_update_to_capella#capella
-    - upgrade_lc_header_to_capella#capella
-    - upgrade_lc_optimistic_update_to_capella#capella
-    - upgrade_lc_store_to_capella#capella
-    - upgrade_lc_update_to_capella#capella
-    # deneb
-    - get_lc_execution_root#deneb
-    - is_valid_light_client_header#deneb
-    - prepare_execution_payload#deneb
-    - upgrade_lc_bootstrap_to_deneb#deneb
-    - upgrade_lc_finality_update_to_deneb#deneb
-    - upgrade_lc_header_to_deneb#deneb
-    - upgrade_lc_optimistic_update_to_deneb#deneb
-    - upgrade_lc_store_to_deneb#deneb
-    - upgrade_lc_update_to_deneb#deneb
-    # electra
-    - compute_weak_subjectivity_period#electra
-    - current_sync_committee_gindex_at_slot#electra
-    - finalized_root_gindex_at_slot#electra
-    - get_eth1_vote#electra
-    - get_lc_execution_root#electra
-    - get_pending_partial_withdrawals#electra
-    - get_validators_sweep_withdrawals#electra
-    - is_compounding_withdrawal_credential#electra
-    - is_eligible_for_partial_withdrawals#electra
-    - is_within_weak_subjectivity_period#electra
-    - next_sync_committee_gindex_at_slot#electra
-    - normalize_merkle_branch#electra
-    - prepare_execution_payload#electra
-    - update_pending_partial_withdrawals#electra
-    - upgrade_lc_bootstrap_to_electra#electra
-    - upgrade_lc_finality_update_to_electra#electra
-    - upgrade_lc_header_to_electra#electra
-    - upgrade_lc_optimistic_update_to_electra#electra
-    - upgrade_lc_store_to_electra#electra
-    - upgrade_lc_update_to_electra#electra
-    # fulu
-    - compute_matrix#fulu
-    - get_blob_parameters#fulu
-    - get_data_column_sidecars_from_block#fulu
-    - get_data_column_sidecars_from_column_sidecar#fulu
-    - recover_matrix#fulu
-    # gloas
-    - compute_balance_weighted_acceptance#gloas
-    - compute_balance_weighted_selection#gloas
-    - compute_fork_version#gloas
-    - compute_proposer_indices#gloas
-    - get_ancestor#gloas
-    - get_aggregate_due_ms#gloas
-    - get_attestation_due_ms#gloas
-    - get_attestation_participation_flag_indices#gloas
-    - get_builder_payment_quorum_threshold#gloas
-    - get_checkpoint_block#gloas
-    - get_contribution_due_ms#gloas
-    - get_data_column_sidecars#gloas
-    - get_data_column_sidecars_from_block#gloas
-    - get_data_column_sidecars_from_column_sidecar#gloas
-    - get_execution_payload_envelope_signature#gloas
-    - get_execution_payload_bid_signature#gloas
-    - get_expected_withdrawals#gloas
-    - get_forkchoice_store#gloas
-    - get_head#gloas
-    - get_indexed_payload_attestation#gloas
-    - get_next_sync_committee_indices#gloas
-    - get_node_children#gloas
-    - get_parent_payload_status#gloas
-    - get_payload_attestation_due_ms#gloas
-    - get_payload_attestation_message_signature#gloas
-    - get_payload_status_tiebreaker#gloas
-    - get_pending_balance_to_withdraw#gloas
-    - get_sync_message_due_ms#gloas
-    - get_ptc#gloas
-    - get_ptc_assignment#gloas
-    - get_weight#gloas
-    - has_compounding_withdrawal_credential#gloas
-    - is_attestation_same_slot#gloas
-    - is_builder_withdrawal_credential#gloas
-    - is_merge_transition_complete#gloas
-    - is_parent_block_full#gloas
-    - is_parent_node_full#gloas
-    - is_payload_timely#gloas
-    - is_supporting_vote#gloas
-    - is_valid_indexed_payload_attestation#gloas
-    - notify_ptc_messages#gloas
-    - on_block#gloas
-    - on_execution_payload#gloas
-    - on_payload_attestation_message#gloas
-    - prepare_execution_payload#gloas
-    - process_attestation#gloas
-    - process_block#gloas
-    - process_builder_pending_payments#gloas
-    - process_epoch#gloas
-    - process_execution_payload#gloas
-    - process_execution_payload_bid#gloas
-    - process_operations#gloas
-    - process_payload_attestation#gloas
-    - process_proposer_slashing#gloas
-    - process_slot#gloas
-    - process_withdrawals#gloas
-    - should_extend_payload#gloas
-    - update_latest_messages#gloas
-    - upgrade_to_gloas#gloas
-    - validate_merge_block#gloas
-    - validate_on_attestation#gloas
-    - verify_data_column_sidecar#gloas
-    - verify_data_column_sidecar_inclusion_proof#gloas
-    - verify_execution_payload_envelope_signature#gloas
-    - verify_execution_payload_bid_signature#gloas
-    - add_builder_to_registry#gloas
-    - apply_deposit_for_builder#gloas
-    - apply_withdrawals#gloas
-    - can_builder_cover_bid#gloas
-    - convert_builder_index_to_validator_index#gloas
-    - convert_validator_index_to_builder_index#gloas
-    - get_attestation_score#gloas
-    - get_attestation_score#phase0
-    - get_balance_after_withdrawals#capella
-    - get_builder_withdrawals#gloas
-    - get_builders_sweep_withdrawals#gloas
-    - get_index_for_new_builder#gloas
-    - get_proposer_preferences_signature#gloas
-    - get_upcoming_proposal_slots#gloas
-    - is_active_builder#gloas
-    - is_builder_index#gloas
-    - is_data_available#gloas
-    - is_eligible_for_partial_withdrawals#electra
-    - is_head_late#gloas
-    - is_head_weak#gloas
-    - is_parent_strong#gloas
-    - is_valid_proposal_slot#gloas
-    - onboard_builders_from_pending_deposits#gloas
-    - process_deposit_request#gloas
-    - record_block_timeliness#gloas
-    - record_block_timeliness#phase0
-    - verify_data_column_sidecar_kzg_proofs#gloas
-    - should_apply_proposer_boost#gloas
-    - update_builder_pending_withdrawals#gloas
-    - update_next_withdrawal_builder_index#gloas
-    - update_payload_expected_withdrawals#gloas
-    - update_proposer_boost_root#gloas
-
-  presets:
-    # gloas
-    - BUILDER_PENDING_WITHDRAWALS_LIMIT#gloas
-    - BUILDER_REGISTRY_LIMIT#gloas
-    - MAX_BUILDERS_PER_WITHDRAWALS_SWEEP#gloas
-    - MAX_PAYLOAD_ATTESTATIONS#gloas
-    - PTC_SIZE#gloas
--- a/.github/ISSUE_TEMPLATE/bug_report.yml
+++ b/.github/ISSUE_TEMPLATE/bug_report.yml
@@ -1,6 +1,6 @@
 name: 🐞 Bug report
 description: Report a bug or problem with running Prysm
-type: "Bug"
+labels: ["Bug"]
 body:
  - type: markdown
    attributes:
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -34,5 +34,4 @@ Fixes #

 - [ ] I have read [CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
 - [ ] I have included a uniquely named [changelog fragment file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [ ] I have added a description with sufficient context for reviewers to understand this PR.
- [ ] I have tested that my changes work as expected and I added a testing plan to the PR description (if applicable). 
+- [ ] I have added a description to this PR with sufficient context for reviewers to understand this PR.
--- a/.github/actions/gomodtidy/Dockerfile
+++ b/.github/actions/gomodtidy/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.25.1-alpine
+FROM golang:1.23-alpine

 COPY entrypoint.sh /entrypoint.sh

--- a/.github/workflows/changelog.yml
+++ b/.github/workflows/changelog.yml
@@ -9,21 +9,21 @@ on:

 jobs:
  run-changelog-check:
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout source code
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        uses: actions/checkout@v3

      - name: Download unclog binary
        uses: dsaltares/fetch-gh-release-asset@aa2ab1243d6e0d5b405b973c89fa4d06a2d0fff7 # 1.1.2
        with:
          repo: OffchainLabs/unclog
-          version: "tags/v0.1.5"
+          version: "tags/v0.1.3"
          file: "unclog"

      - name: Get new changelog files
        id: new-changelog-files
-        uses: OffchainLabs/gh-action-changed-files@9200e69727eb73eb060652b19946b8a2fdfb654b # v4.0.8
+        uses: tj-actions/changed-files@v45
        with:
          files: |
            changelog/**.md
--- a/.github/workflows/check-logs.yml
+++ b/.github/workflows/check-logs.yml
@@ -1,23 +0,0 @@
-name: Check log.go files
-on: [ pull_request ]
-
-jobs:
-  check-logs:
-    runs-on: ubuntu-4
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go 1.25.1
-        uses: actions/setup-go@v5
-        with:
-          go-version: '1.25.1'
-
-      - name: Install ripgrep
-        run: sudo apt-get install -y ripgrep
-
-      - name: Check log.go files
-        run: ./hack/check-logs.sh
--- a/.github/workflows/check-specrefs.yml
+++ b/.github/workflows/check-specrefs.yml
@@ -1,43 +0,0 @@
-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=$(grep '^version:' .ethspecify.yml | sed 's/version: //')
-        if [ "$WORKSPACE_VERSION" != "$ETHSPECIFY_VERSION" ]; then
-          echo "Version mismatch between WORKSPACE and ethspecify"
-          echo "  WORKSPACE: $WORKSPACE_VERSION"
-          echo "  .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
-
-    - 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
--- a/.github/workflows/clang-format.yml
+++ b/.github/workflows/clang-format.yml
@@ -1,6 +1,6 @@
 name: Protobuf Format

-on:
+on: 
  push:
    branches: [ '*' ]
  pull_request:
@@ -10,16 +10,12 @@ on:

 jobs:
  clang-format-checking:
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v6
-      # Is this step failing for you?
+      - uses: actions/checkout@v2
+      # Is this step failing for you? 
      # Run: clang-format -i proto/**/*.proto
      # See: https://clang.llvm.org/docs/ClangFormat.html
-      - name: Install clang-format
-        run: |
-          sudo apt-get update -qq
-          sudo apt-get install -y clang-format
-      - name: Check protobuf formatting
-        run: |
-          clang-format --style=LLVM --dry-run --Werror proto/**/*.proto
+      - uses: RafikFarhad/clang-format-github-action@v3
+        with:
+          sources: "proto/**/*.proto"
--- a/.github/workflows/fuzz.yml
+++ b/.github/workflows/fuzz.yml
@@ -10,13 +10,13 @@ permissions:

 jobs:
  list:
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    timeout-minutes: 180
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-go@v4
        with:
-          go-version: '1.25.1'
+          go-version: '1.23.5'
      - 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-4
+    runs-on: ubuntu-latest
    timeout-minutes: 360
    needs: list
    strategy:
@@ -36,7 +36,7 @@ jobs:
      - uses: actions/checkout@v3
      - uses: actions/setup-go@v4
        with:
-          go-version: '1.25.1'
+          go-version: '1.23.5'
      - uses: shogo82148/actions-go-fuzz/run@v0
        with:
          packages: ${{ matrix.package }}
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -2,7 +2,7 @@ name: Go

 on:
  push:
-    branches: [ master, develop ]
+    branches: [ master ]
  pull_request:
    branches: [ '*' ]
  merge_group:
@@ -11,7 +11,7 @@ on:
 jobs:
  formatting:
    name: Formatting
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
@@ -22,49 +22,49 @@ jobs:

  gosec:
    name: Gosec scan
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    env:
      GO111MODULE: on
    steps:
      - name: Checkout
        uses: actions/checkout@v4
-      - name: Set up Go 1.24
+      - name: Set up Go 1.23
        uses: actions/setup-go@v4
        with:
-          go-version: '1.25.1'
+          go-version: '1.23.5'
      - 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@v2.22.1
-          gosec -exclude-generated -exclude=G307,G115 -exclude-dir=crypto/bls/herumi ./...
+          go install github.com/securego/gosec/v2/cmd/gosec@v2.19.0
+          gosec -exclude-generated -exclude=G307 -exclude-dir=crypto/bls/herumi ./...

  lint:
    name: Lint
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0

-      - name: Set up Go 1.25.1
-        uses: actions/setup-go@v5
+      - name: Set up Go 1.23
+        uses: actions/setup-go@v4
        with:
-          go-version: '1.25.1'
+          go-version: '1.23.5'
+          id: go

      - name: Golangci-lint
-        uses: golangci/golangci-lint-action@v8
+        uses: golangci/golangci-lint-action@v5
        with:
-          version: v2.4
+          version: v1.63.4
+          args: --config=.golangci.yml --out-${NO_FUTURE}format colored-line-number

  build:
    name: Build
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    steps:
-      - name: Set up Go 1.25.1
+      - name: Set up Go 1.x
        uses: actions/setup-go@v4
        with:
-          go-version: '1.25.1'
+          go-version: '1.23.5'
        id: go

      - name: Check out code into the Go module directory
--- a/.github/workflows/horusec.yaml
+++ b/.github/workflows/horusec.yaml
@@ -8,7 +8,7 @@ on:
 jobs:
  Horusec_Scan:
    name: horusec-Scan
-    runs-on: ubuntu-4
+    runs-on: ubuntu-latest
    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"
--- a/.github/workflows/sbom-export.yaml
+++ b/.github/workflows/sbom-export.yaml
@@ -1,67 +0,0 @@
-name: SBOM Export & Centralize
-
-on:
-  push:
-    branches: [ "develop" ]
-  schedule:
-    - cron: '50 21 * * 2'
-
-permissions:
-  contents: read
-
-jobs:
-  generate-and-upload:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout Source Code
-        uses: actions/checkout@v6
-
-      - name: Check for recent changes
-        id: check
-        run: |
-          if [ -z "$(git log --since='7 days ago' --oneline | head -1)" ]; then
-            echo "No commits in the last 7 days, skipping SBOM generation."
-            echo "skip=true" >> "$GITHUB_OUTPUT"
-          fi
-
-      - name: Generate CycloneDX SBOM via cdxgen
-        if: steps.check.outputs.skip != 'true'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          docker run --rm \
-            --user "$(id -u):$(id -g)" \
-            -v /tmp:/tmp \
-            -v "${{ github.workspace }}:/app:rw" \
-            -e FETCH_LICENSE=true \
-            -e GITHUB_TOKEN \
-            ghcr.io/cdxgen/cdxgen:v12.1.1 \
-            -r /app \
-            -o /app/sbom.cdx.json \
-            --no-install-deps \
-            --spec-version 1.6
-
-          if [ ! -s sbom.cdx.json ]; then
-            echo "::error::cdxgen SBOM generation failed or returned empty."
-            exit 1
-          fi
-
-          echo "SBOM generated successfully:"
-          ls -lh sbom.cdx.json
-
-      - name: Upload SBOM to Dependency Track
-        if: steps.check.outputs.skip != 'true'
-        env:
-          DT_API_KEY: ${{ secrets.DEPENDENCY_TRACK_API_KEY }}
-          DT_URL: ${{ secrets.DEPENDENCY_TRACK_URL }}
-        run: |
-          REPO_NAME=${GITHUB_REPOSITORY##*/}
-
-          curl -sf -X POST "${DT_URL}/api/v1/bom" \
-            -H "X-Api-Key: ${DT_API_KEY}" \
-            -F "autoCreate=true" \
-            -F "projectName=${REPO_NAME}" \
-            -F "projectVersion=${{ github.ref_name }}" \
-            -F "bom=@sbom.cdx.json"
-
-          echo "SBOM uploaded to Dependency Track for ${REPO_NAME}@${{ github.ref_name }}"
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -1,40 +1,89 @@
-version: "2"
 run:
-  go: 1.23.5
-linters:
-  enable:
-    - errcheck
-    - ineffassign
-    - govet
-  disable:
-    - staticcheck
-    - 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$
+  timeout: 10m
+  go: '1.23.5'

-formatters:
-  enable:
-    - gofmt
-    - goimports
-  exclusions:
-    generated: lax
-    paths:
-      - validator/web/site_data.go
-      - proto
-      - tools/analyzers
-      - third_party$
-      - builtin$
-      - examples$
+issues:
+  exclude-files:
+    - validator/web/site_data.go
+    - .*_test.go
+  exclude-dirs:
+    - proto
+    - tools/analyzers
+
+linters:
+  enable-all: true
+  disable:
+    # Deprecated linters:
+    - 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
+    - staticcheck
+    - stylecheck
+    - tagalign
+    - tagliatelle
+    - thelper
+    - unparam
+    - varnamelen
+    - wrapcheck
+    - wsl
+
+linters-settings:
+  gocognit:
+    # TODO: We should target for < 50
+    min-complexity: 65
+
+output:
+  print-issued-lines: true
+  sort-results: true
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: go
-go_import_path: github.com/OffchainLabs/prysm
+go_import_path: github.com/prysmaticlabs/prysm
 sudo: false
 matrix:
  include:
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -1,17 +1,18 @@
 load("@bazel_gazelle//:def.bzl", "gazelle")
+load("@com_github_atlassian_bazel_tools//gometalinter:def.bzl", "gometalinter")
 load("@com_github_atlassian_bazel_tools//goimports:def.bzl", "goimports")
 load("@io_kubernetes_build//defs:run_in_workspace.bzl", "workspace_binary")
 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/OffchainLabs/prysm"
+prefix = "github.com/prysmaticlabs/prysm"

 exports_files([
    "LICENSE.md",
 ])

-# gazelle:prefix github.com/OffchainLabs/prysm/v7
+# gazelle:prefix github.com/prysmaticlabs/prysm/v5
 # 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
@@ -54,6 +55,15 @@ alias(
    visibility = ["//visibility:public"],
 )

+gometalinter(
+    name = "gometalinter",
+    config = "//:.gometalinter.json",
+    paths = [
+        "./...",
+    ],
+    prefix = prefix,
+)
+
 goimports(
    name = "goimports",
    display_diffs = True,
@@ -155,7 +165,7 @@ STATICCHECK_ANALYZERS = [
    "sa6006",
    "sa9001",
    "sa9002",
-    "sa9003",
+    #"sa9003", # Doesn't build. See https://github.com/dominikh/go-tools/pull/1483
    "sa9004",
    "sa9005",
    "sa9006",
@@ -183,32 +193,10 @@ nogo(
        "//tools/analyzers/featureconfig:go_default_library",
        "//tools/analyzers/gocognit:go_default_library",
        "//tools/analyzers/ineffassign:go_default_library",
-        "//tools/analyzers/httpwriter: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/modernize/any:go_default_library",
-        "//tools/analyzers/modernize/appendclipped:go_default_library",
-        "//tools/analyzers/modernize/bloop:go_default_library",
-        "//tools/analyzers/modernize/fmtappendf:go_default_library",
-        "//tools/analyzers/modernize/forvar:go_default_library",
-        "//tools/analyzers/modernize/mapsloop:go_default_library",
-        "//tools/analyzers/modernize/minmax:go_default_library",
-        #"//tools/analyzers/modernize/newexpr:go_default_library", # Disabled until go 1.26.
-        "//tools/analyzers/modernize/omitzero:go_default_library",
-        "//tools/analyzers/modernize/rangeint:go_default_library",
-        "//tools/analyzers/modernize/reflecttypefor:go_default_library",
-        "//tools/analyzers/modernize/slicescontains:go_default_library",
-        #"//tools/analyzers/modernize/slicesdelete:go_default_library", # Disabled, see https://go.dev/issue/73686
-        "//tools/analyzers/modernize/slicessort:go_default_library",
-        "//tools/analyzers/modernize/stringsbuilder:go_default_library",
-        "//tools/analyzers/modernize/stringscutprefix:go_default_library",
-        "//tools/analyzers/modernize/stringsseq:go_default_library",
-        "//tools/analyzers/modernize/testingcontext:go_default_library",
-        "//tools/analyzers/modernize/waitgroup: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",
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
--- a/CONTRIBUTING.md
+++ b/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/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!
+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!

 > [!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/OffchainLabs/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/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.
+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.

 **3. Create a local clone of Prysm.**

 ```
-$ mkdir -p $GOPATH/src/github.com/OffchainLabs
-$ cd $GOPATH/src/github.com/OffchainLabs
-$ git clone https://github.com/OffchainLabs/prysm.git
-$ cd $GOPATH/src/github.com/OffchainLabs/prysm
+$ 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
 ```

 **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/OffchainLabs/prysm.git
+$ git remote add prysm https://github.com/prysmaticlabs/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/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.
+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.

 **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/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.
+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.

 **18. Respond to comments by Core Contributors.**

--- a/DEPENDENCIES.md
+++ b/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://prysm.offchainlabs.com/docs/install-prysm/install-with-bazel/#why-bazel) to fully
+to read [Why Bazel?](https://github.com/prysmaticlabs/documentation/issues/138) 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/OffchainLabs/example@v1.2.3
+go get github.com/prysmaticlabs/example@v1.2.3
 bazel run //:gazelle -- update-repos -from_file=go.mod -to_macro=deps.bzl%prysm_deps -prune=true
 ```

@@ -72,7 +72,7 @@ Do NOT add new `go_repository` to the WORKSPACE file. All dependencies should li

 To enable conditional compilation and custom configuration for tests (where compiled code has more 
 debug info, while not being completely optimized), we rely on Go's build tags/constraints mechanism 
-(see official docs on [build constraints](https://pkg.go.dev/go/build#hdr-Build_Constraints)). 
+(see official docs on [build constraints](https://golang.org/pkg/go/build/#hdr-Build_Constraints)). 
 Therefore, whenever using `go test`, do not forget to pass in extra build tag, eg:

 ```bash
--- a/INTEROP.md
+++ b/INTEROP.md
@@ -9,8 +9,8 @@ This README details how to setup Prysm for interop testing for usage with other

 ## Installation & Setup

-1. Install [Bazel](https://bazel.build/install) **(Recommended)**
-2. `git clone https://github.com/OffchainLabs/prysm && cd prysm`
+1. Install [Bazel](https://docs.bazel.build/versions/master/install.html) **(Recommended)**
+2. `git clone https://github.com/prysmaticlabs/prysm && cd prysm`
 3. `bazel build //cmd/...`

 ## Starting from Genesis
--- a/README.md
+++ b/README.md
@@ -1,68 +1,37 @@
-<h1 align="left">Prysm: An Ethereum Consensus Implementation Written in Go</h1>
+# Prysm: An Ethereum Consensus Implementation Written in Go

-<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/OffchainLabs/prysm)](https://goreportcard.com/report/github.com/OffchainLabs/prysm)
+[![Go Report Card](https://goreportcard.com/badge/github.com/prysmaticlabs/prysm)](https://goreportcard.com/report/github.com/prysmaticlabs/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/prysm)
-[![GitPOAP Badge](https://public-api.gitpoap.io/v1/repo/OffchainLabs/prysm/badge)](https://www.gitpoap.io/gh/OffchainLabs/prysm)
+[![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)

-</div>
+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.

---
+### Getting Started

-## 📖 Overview
+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).

-This is the core repository for Prysm, a [Golang](https://go.dev/) 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).
+### Staking on Mainnet

-See the [Changelog](https://github.com/OffchainLabs/prysm/releases) for details of the latest releases and upcoming breaking changes.
+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).

---
-
-## 🚀 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://prysm.offchainlabs.com/docs/)**.
-
-💬 **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/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.
+* [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.

-### 🛠 Contribution Guide
+### Guide
+Want to get involved? Check out our [Contribution Guide](https://docs.prylabs.network/docs/contribute/contribution-guidelines/) to learn more!

-Want to get involved? Check out our **[Contribution Guide](https://prysm.offchainlabs.com/docs/contribute/contribution-guidelines/)** to learn more!
+## License

---
+[GNU General Public License v3.0](https://www.gnu.org/licenses/gpl-3.0.en.html)

-## 📜 License
+## Legal Disclaimer

-[![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)
+[Terms of Use](/TERMS_OF_SERVICE.md)
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -2,10 +2,10 @@

 ## Supported Versions

-[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).
+[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).

 ## Reporting a Vulnerability

-Please see our signed [security.txt](https://github.com/OffchainLabs/prysm/blob/develop/.well-known/security.txt) for preferred encryption and reporting destination.
+Please see our signed [security.txt](https://github.com/prysmaticlabs/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.
--- a/168
+++ b/168
@@ -1,7 +1,7 @@
 workspace(name = "prysm")

-load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")

 http_archive(
    name = "rules_pkg",
@@ -16,6 +16,8 @@ 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",
@@ -163,10 +165,10 @@ http_archive(
        # Expose internals of go_test for custom build transitions.
        "//third_party:io_bazel_rules_go_test.patch",
    ],
-    sha256 = "a729c8ed2447c90fe140077689079ca0acfb7580ec41637f312d650ce9d93d96",
+    sha256 = "b2038e2de2cace18f032249cb4bb0048abf583a36369fa98f687af1b3f880b26",
    urls = [
-        "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",
+        "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",
    ],
 )

@@ -190,7 +192,7 @@ load("@rules_oci//oci:pull.bzl", "oci_pull")
 # A multi-arch base image
 oci_pull(
    name = "linux_debian11_multiarch_base",  # Debian bullseye
-    digest = "sha256:55a5e011b2c4246b4c51e01fcc2b452d151e03df052e357465f0392fcd59fddf",
+    digest = "sha256:b82f113425c5b5c714151aaacd8039bc141821cdcd3c65202d42bdf9c43ae60b",  # 2023-12-12
    image = "gcr.io/prysmaticlabs/distroless/cc-debian11",
    platforms = [
        "linux/amd64",
@@ -205,30 +207,10 @@ prysm_image_deps()

 load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")

-# Override golang.org/x/tools to use v0.38.0 instead of v0.30.0
-# This is necessary as this dependency is required by rules_go and they do not accept dependency
-# update PRs. Instead, they ask downstream projects to override the dependency. To generate the
-# patches or update this dependency again, check out the rules_go repo then run the releaser tool.
-# bazel run //go/tools/releaser -- upgrade-dep -mirror=false org_golang_x_tools
-# Copy the patches and http_archive updates from rules_go here.
-http_archive(
-    name = "org_golang_x_tools",
-    patch_args = ["-p1"],
-    patches = [
-        "//third_party:org_golang_x_tools-deletegopls.patch",
-        "//third_party:org_golang_x_tools-gazelle.patch",
-    ],
-    sha256 = "8509908cd7fc35aa09ff49d8494e4fd25bab9e6239fbf57e0d8344f6bec5802b",
-    strip_prefix = "tools-0.38.0",
-    urls = [
-        "https://github.com/golang/tools/archive/refs/tags/v0.38.0.zip",
-    ],
-)
-
 go_rules_dependencies()

 go_register_toolchains(
-    go_version = "1.25.1",
+    go_version = "1.23.5",
    nogo = "@//:nogo",
 )

@@ -273,18 +255,56 @@ filegroup(
    url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )

-consensus_spec_version = "v1.7.0-alpha.2"
+consensus_spec_version = "v1.5.0-alpha.10"

-load("@prysm//tools:download_spectests.bzl", "consensus_spec_tests")
+bls_test_version = "v0.1.1"

-consensus_spec_tests(
-    name = "consensus_spec_tests",
-    flavors = {
-        "general": "sha256-iGQsGZ1cHah+2CSod9jC3kN8Ku4n6KO0hIwfINrn/po=",
-        "minimal": "sha256-TgcYt8N8sXSttdHTGvOa+exUZ1zn1UzlAMz0V7i37xc=",
-        "mainnet": "sha256-LnXyiLoJtrvEvbqLDSAAqpLMdN/lXv92SAgYG8fNjCs=",
-    },
-    version = consensus_spec_version,
+http_archive(
+    name = "consensus_spec_tests_general",
+    build_file_content = """
+filegroup(
+    name = "test_data",
+    srcs = glob([
+        "**/*.ssz_snappy",
+        "**/*.yaml",
+    ]),
+    visibility = ["//visibility:public"],
+)
+    """,
+    integrity = "sha256-NtWIhbO/mVMb1edq5jqABL0o8R1tNFiuG8PCMAsUHcs=",
+    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-DFlFlnzls1bBrDm+/xD8NK2ivvkhxR+rSNVLLqScVKc=",
+    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-G9ENPF8udZL/BqRHbi60GhFPnZDPZAH6UjcjRiOlvbk=",
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )

 http_archive(
@@ -298,13 +318,11 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    integrity = "sha256-Y/67Dg393PksZj5rTFNLntiJ6hNdB7Rxbu5gZE2gebY=",
+    integrity = "sha256-ClOLKkmAcEi8/uKi6LDeqthask5+E3sgxVoA0bqmQ0c=",
    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 = """
@@ -320,6 +338,22 @@ 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 = """
@@ -331,25 +365,9 @@ filegroup(
    visibility = ["//visibility:public"],
 )
 """,
-    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-+mqMXyboedVw8Yp0v+U9GDz98QoC1SZET8mjaKPX+AI=",
-    strip_prefix = "mainnet-980aee8893a2291d473c38f63797d5bc370fa381",
-    url = "https://github.com/eth-clients/mainnet/archive/980aee8893a2291d473c38f63797d5bc370fa381.tar.gz",
+    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
 )

 http_archive(
@@ -363,33 +381,17 @@ filegroup(
    visibility = ["//visibility:public"],
 )
 """,
-    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",
+    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
 )

 http_archive(
    name = "com_google_protobuf",
-    sha256 = "7c3ebd7aaedd86fa5dc479a0fda803f602caaf78d8aff7ce83b89e1b8ae7442a",
-    strip_prefix = "protobuf-28.3",
+    sha256 = "9bd87b8280ef720d3240514f884e56a712f2218f0d693b48050c836028940a42",
+    strip_prefix = "protobuf-25.1",
    urls = [
-        "https://github.com/protocolbuffers/protobuf/archive/v28.3.tar.gz",
+        "https://github.com/protocolbuffers/protobuf/archive/v25.1.tar.gz",
    ],
 )

@@ -423,9 +425,13 @@ load("@prysm//testing/endtoend:deps.bzl", "e2e_deps")

 e2e_deps()

+load("@com_github_atlassian_bazel_tools//gometalinter:deps.bzl", "gometalinter_dependencies")
+
+gometalinter_dependencies()
+
 load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")

-gazelle_dependencies(go_sdk = "go_sdk")
+gazelle_dependencies()

 load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")

--- a/api/BUILD.bazel
+++ b/api/BUILD.bazel
@@ -7,7 +7,7 @@ go_library(
        "headers.go",
        "jwt.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api",
    visibility = ["//visibility:public"],
    deps = [
        "//crypto/rand:go_default_library",
--- a/api/apiutil/BUILD.bazel
+++ b/api/apiutil/BUILD.bazel
@@ -1,30 +0,0 @@
-load("@prysm//tools/go:def.bzl", "go_library", "go_test")
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "common.go",
-        "header.go",
-        "log.go",
-    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/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",
-    ],
-)
--- a/api/apiutil/common.go
+++ b/api/apiutil/common.go
@@ -1,23 +0,0 @@
-package apiutil
-
-import (
-	"fmt"
-	neturl "net/url"
-	"strconv"
-
-	"github.com/OffchainLabs/prysm/v7/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())
-}
--- a/api/apiutil/common_test.go
+++ b/api/apiutil/common_test.go
@@ -1,37 +0,0 @@
-package apiutil
-
-import (
-	"net/url"
-	"testing"
-
-	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v7/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)
-}
--- a/api/apiutil/header.go
+++ b/api/apiutil/header.go
@@ -1,120 +0,0 @@
-package apiutil
-
-import (
-	"mime"
-	"sort"
-	"strconv"
-	"strings"
-)
-
-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.SplitSeq(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
-}
--- a/api/apiutil/header_test.go
+++ b/api/apiutil/header_test.go
@@ -1,174 +0,0 @@
-package apiutil
-
-import (
-	"testing"
-
-	"github.com/OffchainLabs/prysm/v7/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)
-		})
-	}
-}
--- a/api/apiutil/log.go
+++ b/api/apiutil/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package apiutil
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/apiutil")
--- a/api/client/BUILD.bazel
+++ b/api/client/BUILD.bazel
@@ -6,22 +6,15 @@ go_library(
        "client.go",
        "errors.go",
        "options.go",
-        "transport.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/client",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client",
    visibility = ["//visibility:public"],
    deps = ["@com_github_pkg_errors//:go_default_library"],
 )

 go_test(
    name = "go_default_test",
-    srcs = [
-        "client_test.go",
-        "transport_test.go",
-    ],
+    srcs = ["client_test.go"],
    embed = [":go_default_library"],
-    deps = [
-        "//testing/assert:go_default_library",
-        "//testing/require:go_default_library",
-    ],
+    deps = ["//testing/require:go_default_library"],
 )
--- a/api/client/beacon/BUILD.bazel
+++ b/api/client/beacon/BUILD.bazel
@@ -5,17 +5,19 @@ go_library(
    srcs = [
        "client.go",
        "doc.go",
+        "health.go",
        "log.go",
-        "template.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/client/beacon",
+    importpath = "github.com/prysmaticlabs/prysm/v5/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",
@@ -25,10 +27,15 @@ go_library(

 go_test(
    name = "go_default_test",
-    srcs = ["client_test.go"],
+    srcs = [
+        "client_test.go",
+        "health_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",
    ],
 )
--- a/api/client/beacon/client.go
+++ b/api/client/beacon/client.go
@@ -9,16 +9,19 @@ import (
 	"net/url"
 	"path"
 	"regexp"
+	"sort"
 	"strconv"
+	"text/template"

-	"github.com/OffchainLabs/prysm/v7/api/client"
-	"github.com/OffchainLabs/prysm/v7/api/server"
-	"github.com/OffchainLabs/prysm/v7/api/server/structs"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v7/encoding/bytesutil"
-	ethpb "github.com/OffchainLabs/prysm/v7/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"
 )

@@ -61,6 +64,23 @@ 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))
@@ -94,6 +114,8 @@ 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
@@ -116,6 +138,8 @@ 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
@@ -135,6 +159,24 @@ 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)
@@ -284,7 +326,7 @@ func (c *Client) SubmitChangeBLStoExecution(ctx context.Context, request []*stru
 	if resp.StatusCode != http.StatusOK {
 		decoder := json.NewDecoder(resp.Body)
 		decoder.DisallowUnknownFields()
-		errorJson := &server.IndexedErrorContainer{}
+		errorJson := &server.IndexedVerificationFailureError{}
 		if err := decoder.Decode(errorJson); err != nil {
 			return errors.Wrapf(err, "failed to decode error JSON for %s", resp.Request.URL)
 		}
@@ -314,3 +356,31 @@ 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
+}
--- a/api/client/beacon/client_test.go
+++ b/api/client/beacon/client_test.go
@@ -4,8 +4,8 @@ import (
 	"net/url"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/api/client"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/api/client"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

 func TestParseNodeVersion(t *testing.T) {
--- a/api/client/beacon/health.go
+++ b/api/client/beacon/health.go
@@ -0,0 +1,60 @@
+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
+}
--- a/api/client/beacon/health_test.go
+++ b/api/client/beacon/health_test.go
@@ -0,0 +1,112 @@
+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
+}
--- a/api/client/beacon/iface/BUILD.bazel
+++ b/api/client/beacon/iface/BUILD.bazel
@@ -2,7 +2,7 @@ load("@prysm//tools/go:def.bzl", "go_library")

 go_library(
    name = "go_default_library",
-    srcs = ["fuzz.go"],
-    importpath = "github.com/OffchainLabs/prysm/v7/testing/fuzz",
+    srcs = ["health.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/beacon/iface",
    visibility = ["//visibility:public"],
 )
--- a/api/client/beacon/iface/health.go
+++ b/api/client/beacon/iface/health.go
@@ -0,0 +1,13 @@
+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
+}
--- a/api/client/beacon/log.go
+++ b/api/client/beacon/log.go
@@ -1,9 +1,5 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
 package beacon

 import "github.com/sirupsen/logrus"

-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/client/beacon")
+var log = logrus.WithField("prefix", "beacon")
--- a/api/client/beacon/template.go
+++ b/api/client/beacon/template.go
@@ -1,34 +0,0 @@
-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)
-}
--- a/api/client/beacon/testing/BUILD.bazel
+++ b/api/client/beacon/testing/BUILD.bazel
@@ -0,0 +1,12 @@
+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",
+    ],
+)
--- a/api/client/beacon/testing/mock.go
+++ b/api/client/beacon/testing/mock.go
@@ -0,0 +1,59 @@
+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
+}
--- a/api/client/builder/BUILD.bazel
+++ b/api/client/builder/BUILD.bazel
@@ -6,14 +6,14 @@ go_library(
        "bid.go",
        "client.go",
        "errors.go",
-        "log.go",
        "types.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/client/builder",
+    importpath = "github.com/prysmaticlabs/prysm/v5/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",
@@ -28,11 +28,11 @@ 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",
        "@com_github_sirupsen_logrus//:go_default_library",
-        "@io_opentelemetry_go_contrib_instrumentation_net_http_otelhttp//:go_default_library",
        "@org_golang_google_protobuf//proto:go_default_library",
    ],
 )
@@ -51,7 +51,6 @@ 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",
@@ -60,9 +59,9 @@ 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",
+        "@com_github_sirupsen_logrus//:go_default_library",
    ],
 )
--- a/api/client/builder/bid.go
+++ b/api/client/builder/bid.go
@@ -1,14 +1,14 @@
 package builder

 import (
-	consensus_types "github.com/OffchainLabs/prysm/v7/consensus-types"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/interfaces"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
-	v1 "github.com/OffchainLabs/prysm/v7/proto/engine/v1"
-	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v7/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.
--- a/api/client/builder/client.go
+++ b/api/client/builder/client.go
@@ -12,39 +12,31 @@ import (
 	"strings"
 	"text/template"

-	"github.com/OffchainLabs/prysm/v7/api"
-	"github.com/OffchainLabs/prysm/v7/api/client"
-	"github.com/OffchainLabs/prysm/v7/api/server/structs"
-	"github.com/OffchainLabs/prysm/v7/config/params"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/interfaces"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v7/monitoring/tracing"
-	"github.com/OffchainLabs/prysm/v7/monitoring/tracing/trace"
-	v1 "github.com/OffchainLabs/prysm/v7/proto/engine/v1"
-	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v7/runtime/version"
 	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
-	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+	"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"
 )

 const (
-	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"
+	getExecHeaderPath          = "/eth/v1/builder/header/{{.Slot}}/{{.ParentHash}}/{{.Pubkey}}"
+	getStatus                  = "/eth/v1/builder/status"
+	postBlindedBeaconBlockPath = "/eth/v1/builder/blinded_blocks"
+	postRegisterValidatorPath  = "/eth/v1/builder/validators"
 )

-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")
-)
+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")

 // ClientOpt is a functional option for the Client type (http.Client wrapper)
 type ClientOpt func(*Client)
@@ -59,21 +51,15 @@ 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) {
 	b := bytes.NewBuffer(nil)
 	if r.Body == nil {
-		log.WithFields(logrus.Fields{
+		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)
@@ -87,10 +73,10 @@ func (*requestLogger) observe(r *http.Request) (e error) {
 		return err
 	}
 	r.Body = io.NopCloser(b)
-	log.WithFields(logrus.Fields{
+	log.WithFields(log.Fields{
 		"bodyBase64": string(body),
 		"url":        r.URL.String(),
-	}).Info("Builder http request")
+	}).Info("builder http request")

 	return nil
 }
@@ -102,17 +88,15 @@ 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.BlobsBundler, error)
-	SubmitBlindedBlockPostFulu(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) error
+	SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, *v1.BlobsBundle, 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
-	sszEnabled bool
+	hc      *http.Client
+	baseURL *url.URL
+	obvs    []observer
 }

 // NewClient constructs a new client with the provided options (ex WithTimeout).
@@ -124,7 +108,7 @@ func NewClient(host string, opts ...ClientOpt) (*Client, error) {
 		return nil, err
 	}
 	c := &Client{
-		hc:      &http.Client{Transport: otelhttp.NewTransport(http.DefaultTransport)},
+		hc:      &http.Client{},
 		baseURL: u,
 	}
 	for _, o := range opts {
@@ -154,8 +138,7 @@ 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.
-// 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) {
+func (c *Client) do(ctx context.Context, method string, path string, body io.Reader, opts ...reqOption) (res []byte, err error) {
 	ctx, span := trace.StartSpan(ctx, "builder.client.do")
 	defer func() {
 		tracing.AnnotateError(span, err)
@@ -171,6 +154,10 @@ 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)
@@ -190,8 +177,8 @@ 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 != expectedStatus {
-		err = unexpectedStatusErr(r, expectedStatus)
+	if r.StatusCode != http.StatusOK {
+		err = non200Err(r)
 		return
 	}
 	res, err = io.ReadAll(io.LimitReader(r.Body, client.MaxBodySize))
@@ -199,7 +186,6 @@ 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
 }

@@ -229,145 +215,64 @@ func (c *Client) GetHeader(ctx context.Context, slot primitives.Slot, parentHash
 	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)
-		}
-	}
-	data, header, err := c.do(ctx, http.MethodGet, path, nil, http.StatusOK, getOpts)
+	hb, err := c.do(ctx, http.MethodGet, path, nil)
 	if err != nil {
-		return nil, errors.Wrap(err, "error getting header from builder server")
+		return nil, err
+	}
+	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)
 	}

-	bid, err := c.parseHeaderResponse(data, header, slot)
+	ver, err := version.FromString(strings.ToLower(v.Version))
 	if err != nil {
-		return nil, errors.Wrapf(
-			err,
-			"error rendering exec header template with slot=%d, parentHash=%#x, pubkey=%#x",
-			slot,
-			parentHash,
-			pubkey,
-		)
+		return nil, errors.Wrap(err, fmt.Sprintf("unsupported header version %s", strings.ToLower(v.Version)))
 	}
-	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 {
-		return c.parseHeaderElectra(data, slot)
+		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)
 	}
 	if ver >= version.Deneb {
-		return c.parseHeaderDeneb(data)
+		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)
 	}
 	if ver >= version.Capella {
-		return c.parseHeaderCapella(data)
+		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)
 	}
 	if ver >= version.Bellatrix {
-		return c.parseHeaderBellatrix(data)
-	}
-
-	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")
+		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)
 		}
-		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")
+		p, err := hr.ToProto()
+		if err != nil {
+			return nil, errors.Wrap(err, "could not extract proto message from header")
 		}
-		return WrappedSignedBuilderBidDeneb(sb)
+		return WrappedSignedBuilderBid(p)
 	}
-	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)
+	return nil, fmt.Errorf("unsupported header version %s", strings.ToLower(v.Version))
 }

 // RegisterValidator encodes the SignedValidatorRegistrationV1 message to json (including hex-encoding the byte
@@ -382,274 +287,70 @@ 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
-		}
+	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
 	}

-	if _, _, err = c.do(ctx, http.MethodPost, postRegisterValidatorPath, bytes.NewBuffer(body), http.StatusOK, postOpts); err != nil {
-		return errors.Wrap(err, "do")
+	_, err = c.do(ctx, http.MethodPost, postRegisterValidatorPath, bytes.NewBuffer(body))
+	if err != nil {
+		return err
 	}
 	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 := range svr {
-		vs[i] = structs.SignedValidatorRegistrationFromConsensus(svr[i])
-	}
-	body, err := json.Marshal(vs)
-	if err != nil {
-		return nil, err
-	}
-	return body, nil
-}
-
-func sszValidatorRegisterRequest(svr []*ethpb.SignedValidatorRegistrationV1) ([]byte, error) {
-	if uint64(len(svr)) > params.BeaconConfig().ValidatorRegistryLimit {
-		return nil, errors.Wrap(errMalformedRequest, "validator registry limit exceeded")
-	}
-	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.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) {
+func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
 	if !sb.IsBlinded() {
 		return nil, nil, errNotBlinded
 	}

-	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
-	}
-
+	// massage the proto struct type data into the api response type.
 	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 to JSON")
+		return nil, nil, errors.Wrap(err, "error marshaling blinded block post request to json")
 	}
-	opt := func(r *http.Request) {
-		r.Header.Set(api.VersionHeader, version.String(sb.Version()))
+	postOpts := func(r *http.Request) {
+		r.Header.Add("Eth-Consensus-Version", version.String(sb.Version()))
 		r.Header.Set("Content-Type", api.JsonMediaType)
 		r.Header.Set("Accept", api.JsonMediaType)
 	}
-	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)
+	// 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 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) {
+	// 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.
 	ep := &ExecutionPayloadResponse{}
-	if err := json.Unmarshal(respBytes, ep); err != nil {
-		return nil, nil, errors.Wrap(err, "error unmarshaling ExecutionPayloadResponse")
+	if err := json.Unmarshal(rb, ep); err != nil {
+		return nil, nil, errors.Wrap(err, "error unmarshaling the builder 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 payload with version=%s", ep.Version)
+		return nil, nil, errors.Wrapf(err, "failed to parse execution payload from builder 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
@@ -658,13 +359,11 @@ func (c *Client) parseBlindedBlockResponseJSON(
 	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 version=%s", ep.Version)
+			return nil, nil, errors.Wrapf(err, "failed to extract blobs bundle from builder response with version=%s", ep.Version)
 		}
 		return ed, bbpb, nil
 	}
@@ -675,14 +374,11 @@ func (c *Client) parseBlindedBlockResponseJSON(
 // 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 {
-	getOpts := func(r *http.Request) {
-		r.Header.Set("Accept", api.JsonMediaType)
-	}
-	_, _, err := c.do(ctx, http.MethodGet, getStatus, nil, http.StatusOK, getOpts)
+	_, err := c.do(ctx, http.MethodGet, getStatus, nil)
 	return err
 }

-func unexpectedStatusErr(response *http.Response, expected int) error {
+func non200Err(response *http.Response) error {
 	bodyBytes, err := io.ReadAll(io.LimitReader(response.Body, client.MaxErrBodySize))
 	var errMessage ErrorMessage
 	var body string
@@ -691,20 +387,8 @@ func unexpectedStatusErr(response *http.Response, expected int) error {
 	} else {
 		body = "response body:\n" + string(bodyBytes)
 	}
-	msg := fmt.Sprintf("expected=%d, got=%d, url=%s, body=%s", expected, response.StatusCode, response.Request.URL, body)
+	msg := fmt.Sprintf("code=%d, url=%s, body=%s", 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
@@ -726,12 +410,6 @@ func unexpectedStatusErr(response *http.Response, expected int) 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))
--- a/api/client/builder/client_test.go
+++ b/api/client/builder/client_test.go
--- a/api/client/builder/errors.go
+++ b/api/client/builder/errors.go
@@ -15,10 +15,3 @@ 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")
--- a/api/client/builder/log.go
+++ b/api/client/builder/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package builder
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/client/builder")
--- a/api/client/builder/testing/BUILD.bazel
+++ b/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/OffchainLabs/prysm/v7/api/client/builder/testing",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/builder/testing",
    visibility = ["//visibility:public"],
    deps = [
        "//api/client/builder:go_default_library",
--- a/api/client/builder/testing/mock.go
+++ b/api/client/builder/testing/mock.go
@@ -3,12 +3,12 @@ package testing
 import (
 	"context"

-	"github.com/OffchainLabs/prysm/v7/api/client/builder"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/interfaces"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v7/encoding/bytesutil"
-	v1 "github.com/OffchainLabs/prysm/v7/proto/engine/v1"
-	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"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"
 )

 // MockClient is a mock implementation of BuilderClient.
@@ -41,15 +41,10 @@ func (m MockClient) RegisterValidator(_ context.Context, svr []*ethpb.SignedVali
 }

 // SubmitBlindedBlock --
-func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, v1.BlobsBundler, error) {
+func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, *v1.BlobsBundle, 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
--- a/api/client/builder/types.go
+++ b/api/client/builder/types.go
--- a/api/client/builder/types_test.go
+++ b/api/client/builder/types_test.go
@@ -11,18 +11,18 @@ import (
 	"os"
 	"testing"

-	"github.com/OffchainLabs/go-bitfield"
-	"github.com/OffchainLabs/prysm/v7/api/server/structs"
-	fieldparams "github.com/OffchainLabs/prysm/v7/config/fieldparams"
-	consensusblocks "github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
-	"github.com/OffchainLabs/prysm/v7/math"
-	v1 "github.com/OffchainLabs/prysm/v7/proto/engine/v1"
-	eth "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v7/runtime/version"
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/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:   hr.Data.Message.Header.ParentHash,
+			actual:   hexutil.Encode(hr.Data.Message.Header.ParentHash),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hr.Data.Message.Header.FeeRecipient,
+			actual:   hexutil.Encode(hr.Data.Message.Header.FeeRecipient),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.StateRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.StateRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.ReceiptsRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.ReceiptsRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hr.Data.Message.Header.LogsBloom,
+			actual:   hexutil.Encode(hr.Data.Message.Header.LogsBloom),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.PrevRandao,
+			actual:   hexutil.Encode(hr.Data.Message.Header.PrevRandao),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.BlockNumber,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BlockNumber),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.GasLimit,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasLimit),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.GasUsed,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasUsed),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.Timestamp,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.Timestamp),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.ExtraData,
+			actual:   hexutil.Encode(hr.Data.Message.Header.ExtraData),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   hr.Data.Message.Header.BaseFeePerGas,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BaseFeePerGas),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.BlockHash,
+			actual:   hexutil.Encode(hr.Data.Message.Header.BlockHash),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockHash",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.TransactionsRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.TransactionsRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.TransactionsRoot",
 		},
 	}
@@ -427,77 +427,77 @@ func TestExecutionHeaderResponseCapellaUnmarshal(t *testing.T) {
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.ParentHash,
+			actual:   hexutil.Encode(hr.Data.Message.Header.ParentHash),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   hr.Data.Message.Header.FeeRecipient,
+			actual:   hexutil.Encode(hr.Data.Message.Header.FeeRecipient),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.StateRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.StateRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.ReceiptsRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.ReceiptsRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   hr.Data.Message.Header.LogsBloom,
+			actual:   hexutil.Encode(hr.Data.Message.Header.LogsBloom),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.PrevRandao,
+			actual:   hexutil.Encode(hr.Data.Message.Header.PrevRandao),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.BlockNumber,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BlockNumber),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.GasLimit,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasLimit),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.GasUsed,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.GasUsed),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   hr.Data.Message.Header.Timestamp,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.Timestamp),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.ExtraData,
+			actual:   hexutil.Encode(hr.Data.Message.Header.ExtraData),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   hr.Data.Message.Header.BaseFeePerGas,
+			actual:   fmt.Sprintf("%d", hr.Data.Message.Header.BaseFeePerGas),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.BlockHash,
+			actual:   hexutil.Encode(hr.Data.Message.Header.BlockHash),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.BlockHash",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.TransactionsRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.TransactionsRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.TransactionsRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   hr.Data.Message.Header.WithdrawalsRoot,
+			actual:   hexutil.Encode(hr.Data.Message.Header.WithdrawalsRoot),
 			name:     "ExecHeaderResponse.ExecutionPayloadHeader.WithdrawalsRoot",
 		},
 	}
@@ -867,6 +867,88 @@ 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))
@@ -877,67 +959,67 @@ func TestExecutionPayloadResponseCapellaUnmarshal(t *testing.T) {
 	}{
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ParentHash,
+			actual:   hexutil.Encode(epr.Data.ParentHash),
 			name:     "ExecPayloadResponse.ExecutionPayload.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   epr.Data.FeeRecipient,
+			actual:   hexutil.Encode(epr.Data.FeeRecipient),
 			name:     "ExecPayloadResponse.ExecutionPayload.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.StateRoot,
+			actual:   hexutil.Encode(epr.Data.StateRoot),
 			name:     "ExecPayloadResponse.ExecutionPayload.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ReceiptsRoot,
+			actual:   hexutil.Encode(epr.Data.ReceiptsRoot),
 			name:     "ExecPayloadResponse.ExecutionPayload.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   epr.Data.LogsBloom,
+			actual:   hexutil.Encode(epr.Data.LogsBloom),
 			name:     "ExecPayloadResponse.ExecutionPayload.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.PrevRandao,
+			actual:   hexutil.Encode(epr.Data.PrevRandao),
 			name:     "ExecPayloadResponse.ExecutionPayload.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.BlockNumber,
+			actual:   fmt.Sprintf("%d", epr.Data.BlockNumber),
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.GasLimit,
+			actual:   fmt.Sprintf("%d", epr.Data.GasLimit),
 			name:     "ExecPayloadResponse.ExecutionPayload.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.GasUsed,
+			actual:   fmt.Sprintf("%d", epr.Data.GasUsed),
 			name:     "ExecPayloadResponse.ExecutionPayload.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.Timestamp,
+			actual:   fmt.Sprintf("%d", epr.Data.Timestamp),
 			name:     "ExecPayloadResponse.ExecutionPayload.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExtraData,
+			actual:   hexutil.Encode(epr.Data.ExtraData),
 			name:     "ExecPayloadResponse.ExecutionPayload.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   epr.Data.BaseFeePerGas,
+			actual:   fmt.Sprintf("%d", epr.Data.BaseFeePerGas),
 			name:     "ExecPayloadResponse.ExecutionPayload.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.BlockHash,
+			actual:   hexutil.Encode(epr.Data.BlockHash),
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockHash",
 		},
 	}
@@ -946,14 +1028,14 @@ func TestExecutionPayloadResponseCapellaUnmarshal(t *testing.T) {
 	}
 	require.Equal(t, 1, len(epr.Data.Transactions))
 	txHash := "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
-	require.Equal(t, txHash, epr.Data.Transactions[0])
+	require.Equal(t, txHash, hexutil.Encode(epr.Data.Transactions[0]))

 	require.Equal(t, 1, len(epr.Data.Withdrawals))
 	w := epr.Data.Withdrawals[0]
-	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, 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())
 }

 func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
@@ -966,77 +1048,77 @@ func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
 	}{
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExecutionPayload.ParentHash,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ParentHash),
 			name:     "ExecPayloadResponse.ExecutionPayload.ParentHash",
 		},
 		{
 			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
-			actual:   epr.Data.ExecutionPayload.FeeRecipient,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.FeeRecipient),
 			name:     "ExecPayloadResponse.ExecutionPayload.FeeRecipient",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExecutionPayload.StateRoot,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.StateRoot),
 			name:     "ExecPayloadResponse.ExecutionPayload.StateRoot",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExecutionPayload.ReceiptsRoot,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ReceiptsRoot),
 			name:     "ExecPayloadResponse.ExecutionPayload.ReceiptsRoot",
 		},
 		{
 			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
-			actual:   epr.Data.ExecutionPayload.LogsBloom,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.LogsBloom),
 			name:     "ExecPayloadResponse.ExecutionPayload.LogsBloom",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExecutionPayload.PrevRandao,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.PrevRandao),
 			name:     "ExecPayloadResponse.ExecutionPayload.PrevRandao",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.ExecutionPayload.BlockNumber,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BlockNumber),
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockNumber",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.ExecutionPayload.GasLimit,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.GasLimit),
 			name:     "ExecPayloadResponse.ExecutionPayload.GasLimit",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.ExecutionPayload.GasUsed,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.GasUsed),
 			name:     "ExecPayloadResponse.ExecutionPayload.GasUsed",
 		},
 		{
 			expected: "1",
-			actual:   epr.Data.ExecutionPayload.Timestamp,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.Timestamp),
 			name:     "ExecPayloadResponse.ExecutionPayload.Timestamp",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExecutionPayload.ExtraData,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ExtraData),
 			name:     "ExecPayloadResponse.ExecutionPayload.ExtraData",
 		},
 		{
 			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
-			actual:   epr.Data.ExecutionPayload.BaseFeePerGas,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BaseFeePerGas),
 			name:     "ExecPayloadResponse.ExecutionPayload.BaseFeePerGas",
 		},
 		{
 			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
-			actual:   epr.Data.ExecutionPayload.BlockHash,
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.BlockHash),
 			name:     "ExecPayloadResponse.ExecutionPayload.BlockHash",
 		},
 		{
 			expected: "2",
-			actual:   epr.Data.ExecutionPayload.BlobGasUsed,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BlobGasUsed),
 			name:     "ExecPayloadResponse.ExecutionPayload.BlobGasUsed",
 		},
 		{
 			expected: "3",
-			actual:   epr.Data.ExecutionPayload.ExcessBlobGas,
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.ExcessBlobGas),
 			name:     "ExecPayloadResponse.ExecutionPayload.ExcessBlobGas",
 		},
 	}
@@ -1045,16 +1127,64 @@ func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
 	}
 	require.Equal(t, 1, len(epr.Data.ExecutionPayload.Transactions))
 	txHash := "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
-	require.Equal(t, txHash, epr.Data.ExecutionPayload.Transactions[0])
+	require.Equal(t, txHash, hexutil.Encode(epr.Data.ExecutionPayload.Transactions[0]))

 	require.Equal(t, 1, len(epr.Data.ExecutionPayload.Withdrawals))
 	w := epr.Data.ExecutionPayload.Withdrawals[0]
-	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)
+	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)
 }

 func TestExecutionPayloadResponseCapellaToProto(t *testing.T) {
@@ -1222,6 +1352,16 @@ 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),
@@ -1229,6 +1369,14 @@ 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")},
@@ -1241,6 +1389,16 @@ 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{
@@ -1251,6 +1409,16 @@ 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},
@@ -1271,6 +1439,16 @@ 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{
@@ -1311,7 +1489,9 @@ func pbAttesterSlashing(t *testing.T) *eth.AttesterSlashing {
 }

 func TestAttesterSlashing_MarshalJSON(t *testing.T) {
-	as := structs.AttesterSlashingFromConsensus(pbAttesterSlashing(t))
+	as := &AttesterSlashing{
+		AttesterSlashing: 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"}}`
@@ -1419,8 +1599,9 @@ func pbExecutionPayloadHeaderDeneb(t *testing.T) *v1.ExecutionPayloadHeaderDeneb
 }

 func TestExecutionPayloadHeader_MarshalJSON(t *testing.T) {
-	h, err := structs.ExecutionPayloadHeaderFromConsensus(pbExecutionPayloadHeader(t))
-	require.NoError(t, err)
+	h := &ExecutionPayloadHeader{
+		ExecutionPayloadHeader: pbExecutionPayloadHeader(t),
+	}
 	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"}`
@@ -1428,9 +1609,9 @@ func TestExecutionPayloadHeader_MarshalJSON(t *testing.T) {
 }

 func TestExecutionPayloadHeaderCapella_MarshalJSON(t *testing.T) {
-	h, err := structs.ExecutionPayloadHeaderCapellaFromConsensus(pbExecutionPayloadHeaderCapella(t))
-	require.NoError(t, err)
-	require.NoError(t, err)
+	h := &ExecutionPayloadHeaderCapella{
+		ExecutionPayloadHeaderCapella: pbExecutionPayloadHeaderCapella(t),
+	}
 	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"}`
@@ -1438,8 +1619,9 @@ func TestExecutionPayloadHeaderCapella_MarshalJSON(t *testing.T) {
 }

 func TestExecutionPayloadHeaderDeneb_MarshalJSON(t *testing.T) {
-	h, err := structs.ExecutionPayloadHeaderDenebFromConsensus(pbExecutionPayloadHeaderDeneb(t))
-	require.NoError(t, err)
+	h := &ExecutionPayloadHeaderDeneb{
+		ExecutionPayloadHeaderDeneb: pbExecutionPayloadHeaderDeneb(t),
+	}
 	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"}`
@@ -1668,13 +1850,12 @@ 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, err := structs.ExecutionPayloadHeaderFromConsensus(h)
-	require.NoError(t, err)
+	hm := &ExecutionPayloadHeader{ExecutionPayloadHeader: h}
 	m, err := json.Marshal(hm)
 	require.NoError(t, err)
-	hu := &structs.ExecutionPayloadHeader{}
+	hu := &ExecutionPayloadHeader{}
 	require.NoError(t, json.Unmarshal(m, hu))
-	hp, err := hu.ToConsensus()
+	hp, err := hu.ToProto()
 	require.NoError(t, err)
 	require.DeepEqual(t, h.BaseFeePerGas, hp.BaseFeePerGas)
 }
@@ -1682,7 +1863,7 @@ func TestRoundTripProtoUint256(t *testing.T) {
 func TestExecutionPayloadHeaderRoundtrip(t *testing.T) {
 	expected, err := os.ReadFile("testdata/execution-payload.json")
 	require.NoError(t, err)
-	hu := &structs.ExecutionPayloadHeader{}
+	hu := &ExecutionPayloadHeader{}
 	require.NoError(t, json.Unmarshal(expected, hu))
 	m, err := json.Marshal(hu)
 	require.NoError(t, err)
@@ -1692,14 +1873,14 @@ func TestExecutionPayloadHeaderRoundtrip(t *testing.T) {
 func TestExecutionPayloadHeaderCapellaRoundtrip(t *testing.T) {
 	expected, err := os.ReadFile("testdata/execution-payload-capella.json")
 	require.NoError(t, err)
-	hu := &structs.ExecutionPayloadHeaderCapella{}
+	hu := &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_unexpectedStatusErr(t *testing.T) {
+func TestErrorMessage_non200Err(t *testing.T) {
 	mockRequest := &http.Request{
 		URL: &url.URL{Path: "example.com"},
 	}
@@ -1779,7 +1960,7 @@ func TestErrorMessage_unexpectedStatusErr(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := unexpectedStatusErr(tt.args, http.StatusOK)
+			err := non200Err(tt.args)
 			if err != nil && tt.wantMessage != "" {
 				require.ErrorContains(t, tt.wantMessage, err)
 			}
@@ -1813,9 +1994,11 @@ 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, pp == nil)
+				require.Equal(t, false, pb == nil)
 			} else {
 				require.ErrorIs(t, err, consensusblocks.ErrNilObject)
 			}
--- a/api/client/client_test.go
+++ b/api/client/client_test.go
@@ -4,7 +4,7 @@ import (
 	"net/url"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

 func TestValidHostname(t *testing.T) {
--- a/api/client/event/BUILD.bazel
+++ b/api/client/event/BUILD.bazel
@@ -4,10 +4,9 @@ go_library(
    name = "go_default_library",
    srcs = [
        "event_stream.go",
-        "log.go",
        "utils.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/client/event",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/event",
    visibility = ["//visibility:public"],
    deps = [
        "//api:go_default_library",
@@ -24,5 +23,8 @@ go_test(
        "utils_test.go",
    ],
    embed = [":go_default_library"],
-    deps = ["//testing/require:go_default_library"],
+    deps = [
+        "//testing/require:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
 )
--- a/api/client/event/event_stream.go
+++ b/api/client/event/event_stream.go
@@ -7,16 +7,29 @@ import (
 	"net/url"
 	"strings"

-	"github.com/OffchainLabs/prysm/v7/api"
-	"github.com/OffchainLabs/prysm/v7/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"
-
-	EventError           = "error"
-	EventConnectionError = "connection_error"
+	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"
 )

 var (
--- a/api/client/event/event_stream_test.go
+++ b/api/client/event/event_stream_test.go
@@ -1,13 +1,15 @@
 package event

 import (
+	"context"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"testing"
 	"time"

-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	log "github.com/sirupsen/logrus"
 )

 func TestNewEventStream(t *testing.T) {
@@ -28,7 +30,7 @@ func TestNewEventStream(t *testing.T) {

 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			_, err := NewEventStream(t.Context(), &http.Client{}, tt.host, tt.topics)
+			_, err := NewEventStream(context.Background(), &http.Client{}, tt.host, tt.topics)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("NewEventStream() error = %v, wantErr %v", err, tt.wantErr)
 			}
@@ -54,7 +56,7 @@ func TestEventStream(t *testing.T) {

 	topics := []string{"head"}
 	eventsChannel := make(chan *Event, 1)
-	stream, err := NewEventStream(t.Context(), http.DefaultClient, server.URL, topics)
+	stream, err := NewEventStream(context.Background(), http.DefaultClient, server.URL, topics)
 	require.NoError(t, err)
 	go stream.Subscribe(eventsChannel)

@@ -81,7 +83,8 @@ func TestEventStream(t *testing.T) {
 func TestEventStreamRequestError(t *testing.T) {
 	topics := []string{"head"}
 	eventsChannel := make(chan *Event, 1)
-	ctx := t.Context()
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()

 	// use valid url that will result in failed request with nil body
 	stream, err := NewEventStream(ctx, http.DefaultClient, "http://badhost:1234", topics)
--- a/api/client/event/log.go
+++ b/api/client/event/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package event
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/client/event")
--- a/api/client/event/utils_test.go
+++ b/api/client/event/utils_test.go
@@ -5,7 +5,7 @@ import (
 	"bytes"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

 func TestScanLinesWithCarriage(t *testing.T) {
--- a/api/client/transport.go
+++ b/api/client/transport.go
@@ -1,25 +0,0 @@
-package client
-
-import "net/http"
-
-// CustomHeadersTransport adds custom headers to each request
-type CustomHeadersTransport struct {
-	base    http.RoundTripper
-	headers map[string][]string
-}
-
-func NewCustomHeadersTransport(base http.RoundTripper, headers map[string][]string) *CustomHeadersTransport {
-	return &CustomHeadersTransport{
-		base:    base,
-		headers: headers,
-	}
-}
-
-func (t *CustomHeadersTransport) RoundTrip(req *http.Request) (*http.Response, error) {
-	for header, values := range t.headers {
-		for _, value := range values {
-			req.Header.Add(header, value)
-		}
-	}
-	return t.base.RoundTrip(req)
-}
--- a/api/client/transport_test.go
+++ b/api/client/transport_test.go
@@ -1,25 +0,0 @@
-package client
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
-)
-
-type noopTransport struct{}
-
-func (*noopTransport) RoundTrip(*http.Request) (*http.Response, error) {
-	return nil, nil
-}
-
-func TestRoundTrip(t *testing.T) {
-	tr := &CustomHeadersTransport{base: &noopTransport{}, headers: map[string][]string{"key1": []string{"value1", "value2"}, "key2": []string{"value3"}}}
-	req := httptest.NewRequest("GET", "http://foo", nil)
-	_, err := tr.RoundTrip(req)
-	require.NoError(t, err)
-	assert.DeepEqual(t, []string{"value1", "value2"}, req.Header.Values("key1"))
-	assert.DeepEqual(t, []string{"value3"}, req.Header.Values("key2"))
-}
--- a/api/client/validator/BUILD.bazel
+++ b/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/OffchainLabs/prysm/v7/api/client/validator",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/validator",
    visibility = ["//visibility:public"],
    deps = [
        "//api/client:go_default_library",
--- a/api/client/validator/client.go
+++ b/api/client/validator/client.go
@@ -6,9 +6,9 @@ import (
 	"fmt"
 	"strings"

-	"github.com/OffchainLabs/prysm/v7/api/client"
-	"github.com/OffchainLabs/prysm/v7/validator/rpc"
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/api/client"
+	"github.com/prysmaticlabs/prysm/v5/validator/rpc"
 )

 const (
--- a/api/fallback/BUILD.bazel
+++ b/api/fallback/BUILD.bazel
@@ -1,19 +0,0 @@
-load("@prysm//tools/go:def.bzl", "go_library", "go_test")
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "fallback.go",
-        "log.go",
-    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/fallback",
-    visibility = ["//visibility:public"],
-    deps = ["@com_github_sirupsen_logrus//:go_default_library"],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = ["fallback_test.go"],
-    embed = [":go_default_library"],
-    deps = ["//testing/assert:go_default_library"],
-)
--- a/api/fallback/fallback.go
+++ b/api/fallback/fallback.go
@@ -1,66 +0,0 @@
-package fallback
-
-import (
-	"context"
-
-	"github.com/sirupsen/logrus"
-)
-
-// HostProvider is the subset of connection-provider methods that EnsureReady
-// needs. Both grpc.GrpcConnectionProvider and rest.RestConnectionProvider
-// satisfy this interface.
-type HostProvider interface {
-	Hosts() []string
-	CurrentHost() string
-	SwitchHost(index int) error
-}
-
-// ReadyChecker can report whether the current endpoint is ready.
-// iface.NodeClient satisfies this implicitly.
-type ReadyChecker interface {
-	IsReady(ctx context.Context) bool
-}
-
-// EnsureReady iterates through the configured hosts and returns true as soon as
-// one responds as ready. It starts from the provider's current host and wraps
-// around using modular arithmetic, performing failover when a host is not ready.
-func EnsureReady(ctx context.Context, provider HostProvider, checker ReadyChecker) bool {
-	hosts := provider.Hosts()
-	numHosts := len(hosts)
-	startingHost := provider.CurrentHost()
-	var attemptedHosts []string
-
-	// Find current index
-	currentIdx := 0
-	for i, h := range hosts {
-		if h == startingHost {
-			currentIdx = i
-			break
-		}
-	}
-
-	for i := range numHosts {
-		if checker.IsReady(ctx) {
-			if len(attemptedHosts) > 0 {
-				log.WithFields(logrus.Fields{
-					"previous": startingHost,
-					"current":  provider.CurrentHost(),
-					"tried":    attemptedHosts,
-				}).Info("Switched to responsive beacon node")
-			}
-			return true
-		}
-		attemptedHosts = append(attemptedHosts, provider.CurrentHost())
-
-		// Try next host if not the last iteration
-		if i < numHosts-1 {
-			nextIdx := (currentIdx + i + 1) % numHosts
-			if err := provider.SwitchHost(nextIdx); err != nil {
-				log.WithError(err).Error("Failed to switch host")
-			}
-		}
-	}
-
-	log.WithField("tried", attemptedHosts).Warn("No responsive beacon node found")
-	return false
-}
--- a/api/fallback/fallback_test.go
+++ b/api/fallback/fallback_test.go
@@ -1,94 +0,0 @@
-package fallback
-
-import (
-	"context"
-	"testing"
-
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-)
-
-// mockHostProvider is a minimal HostProvider for unit tests.
-type mockHostProvider struct {
-	hosts     []string
-	hostIndex int
-}
-
-func (m *mockHostProvider) Hosts() []string { return m.hosts }
-func (m *mockHostProvider) CurrentHost() string {
-	return m.hosts[m.hostIndex%len(m.hosts)]
-}
-func (m *mockHostProvider) SwitchHost(index int) error { m.hostIndex = index; return nil }
-
-// mockReadyChecker records per-call IsReady results in sequence.
-type mockReadyChecker struct {
-	results []bool
-	idx     int
-}
-
-func (m *mockReadyChecker) IsReady(_ context.Context) bool {
-	if m.idx >= len(m.results) {
-		return false
-	}
-	r := m.results[m.idx]
-	m.idx++
-	return r
-}
-
-func TestEnsureReady_SingleHostReady(t *testing.T) {
-	provider := &mockHostProvider{hosts: []string{"http://host1:3500"}, hostIndex: 0}
-	checker := &mockReadyChecker{results: []bool{true}}
-	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
-	assert.Equal(t, 0, provider.hostIndex)
-}
-
-func TestEnsureReady_SingleHostNotReady(t *testing.T) {
-	provider := &mockHostProvider{hosts: []string{"http://host1:3500"}, hostIndex: 0}
-	checker := &mockReadyChecker{results: []bool{false}}
-	assert.Equal(t, false, EnsureReady(t.Context(), provider, checker))
-}
-
-func TestEnsureReady_SingleHostError(t *testing.T) {
-	provider := &mockHostProvider{hosts: []string{"http://host1:3500"}, hostIndex: 0}
-	checker := &mockReadyChecker{results: []bool{false}}
-	assert.Equal(t, false, EnsureReady(t.Context(), provider, checker))
-}
-
-func TestEnsureReady_MultipleHostsFirstReady(t *testing.T) {
-	provider := &mockHostProvider{
-		hosts:     []string{"http://host1:3500", "http://host2:3500"},
-		hostIndex: 0,
-	}
-	checker := &mockReadyChecker{results: []bool{true}}
-	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
-	assert.Equal(t, 0, provider.hostIndex)
-}
-
-func TestEnsureReady_MultipleHostsFailoverToSecond(t *testing.T) {
-	provider := &mockHostProvider{
-		hosts:     []string{"http://host1:3500", "http://host2:3500"},
-		hostIndex: 0,
-	}
-	checker := &mockReadyChecker{results: []bool{false, true}}
-	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
-	assert.Equal(t, 1, provider.hostIndex)
-}
-
-func TestEnsureReady_MultipleHostsNoneReady(t *testing.T) {
-	provider := &mockHostProvider{
-		hosts:     []string{"http://host1:3500", "http://host2:3500", "http://host3:3500"},
-		hostIndex: 0,
-	}
-	checker := &mockReadyChecker{results: []bool{false, false, false}}
-	assert.Equal(t, false, EnsureReady(t.Context(), provider, checker))
-}
-
-func TestEnsureReady_WrapAroundFromNonZeroIndex(t *testing.T) {
-	provider := &mockHostProvider{
-		hosts:     []string{"http://host0:3500", "http://host1:3500", "http://host2:3500"},
-		hostIndex: 1,
-	}
-	// host1 (start) fails, host2 fails, host0 succeeds
-	checker := &mockReadyChecker{results: []bool{false, false, true}}
-	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
-	assert.Equal(t, 0, provider.hostIndex)
-}
--- a/api/fallback/log.go
+++ b/api/fallback/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package fallback
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/fallback")
--- a/api/grpc/BUILD.bazel
+++ b/api/grpc/BUILD.bazel
@@ -3,16 +3,12 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
    name = "go_default_library",
    srcs = [
-        "grpc_connection_provider.go",
        "grpcutils.go",
-        "log.go",
-        "mock_grpc_provider.go",
        "parameters.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/grpc",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/grpc",
    visibility = ["//visibility:public"],
    deps = [
-        "@com_github_pkg_errors//:go_default_library",
        "@com_github_sirupsen_logrus//:go_default_library",
        "@org_golang_google_grpc//:go_default_library",
        "@org_golang_google_grpc//metadata:go_default_library",
@@ -21,17 +17,12 @@ go_library(

 go_test(
    name = "go_default_test",
-    srcs = [
-        "grpc_connection_provider_test.go",
-        "grpcutils_test.go",
-    ],
+    srcs = ["grpcutils_test.go"],
    embed = [":go_default_library"],
    deps = [
        "//testing/assert:go_default_library",
        "//testing/require:go_default_library",
        "@com_github_sirupsen_logrus//hooks/test:go_default_library",
-        "@org_golang_google_grpc//:go_default_library",
-        "@org_golang_google_grpc//credentials/insecure:go_default_library",
        "@org_golang_google_grpc//metadata:go_default_library",
    ],
 )
--- a/api/grpc/grpc_connection_provider.go
+++ b/api/grpc/grpc_connection_provider.go
@@ -1,186 +0,0 @@
-package grpc
-
-import (
-	"context"
-	"strings"
-	"sync"
-
-	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
-	"google.golang.org/grpc"
-)
-
-// GrpcConnectionProvider manages gRPC connections for failover support.
-// It allows switching between different beacon node endpoints when the current one becomes unavailable.
-// Only one connection is maintained at a time - when switching hosts, the old connection is closed.
-type GrpcConnectionProvider interface {
-	// CurrentConn returns the currently active gRPC connection.
-	// The connection is created lazily on first call.
-	// Returns nil if the provider has been closed.
-	CurrentConn() *grpc.ClientConn
-	// CurrentHost returns the address of the currently active endpoint.
-	CurrentHost() string
-	// Hosts returns all configured endpoint addresses.
-	Hosts() []string
-	// SwitchHost switches to the endpoint at the given index.
-	// The new connection is created lazily on next CurrentConn() call.
-	SwitchHost(index int) error
-	// ConnectionCounter returns a monotonically increasing counter that increments
-	// each time SwitchHost changes the active endpoint. This allows consumers to
-	// detect connection changes even when the host string returns to a previous value
-	// (e.g., host0 → host1 → host0).
-	ConnectionCounter() uint64
-	// Close closes the current connection.
-	Close()
-}
-
-type grpcConnectionProvider struct {
-	// Immutable after construction - no lock needed for reads
-	endpoints []string
-	ctx       context.Context
-	dialOpts  []grpc.DialOption
-
-	// Current connection state (protected by mutex)
-	currentIndex uint64
-	conn         *grpc.ClientConn
-	connCounter  uint64
-
-	mu     sync.Mutex
-	closed bool
-}
-
-// NewGrpcConnectionProvider creates a new connection provider that manages gRPC connections.
-// The endpoint parameter can be a comma-separated list of addresses (e.g., "host1:4000,host2:4000").
-// Only one connection is maintained at a time, created lazily on first use.
-func NewGrpcConnectionProvider(
-	ctx context.Context,
-	endpoint string,
-	dialOpts []grpc.DialOption,
-) (GrpcConnectionProvider, error) {
-	endpoints := parseEndpoints(endpoint)
-	if len(endpoints) == 0 {
-		return nil, errors.New("no gRPC endpoints provided")
-	}
-
-	log.WithFields(logrus.Fields{
-		"endpoints": endpoints,
-		"count":     len(endpoints),
-	}).Info("Initialized gRPC connection provider")
-
-	return &grpcConnectionProvider{
-		endpoints: endpoints,
-		ctx:       ctx,
-		dialOpts:  dialOpts,
-	}, nil
-}
-
-// parseEndpoints splits a comma-separated endpoint string into individual endpoints.
-func parseEndpoints(endpoint string) []string {
-	if endpoint == "" {
-		return nil
-	}
-	endpoints := make([]string, 0, 1)
-	for p := range strings.SplitSeq(endpoint, ",") {
-		if p = strings.TrimSpace(p); p != "" {
-			endpoints = append(endpoints, p)
-		}
-	}
-	return endpoints
-}
-
-func (p *grpcConnectionProvider) CurrentConn() *grpc.ClientConn {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	if p.closed {
-		return nil
-	}
-
-	// Return existing connection if available
-	if p.conn != nil {
-		return p.conn
-	}
-
-	// Create connection lazily
-	ep := p.endpoints[p.currentIndex]
-	conn, err := grpc.DialContext(p.ctx, ep, p.dialOpts...)
-	if err != nil {
-		log.WithError(err).WithField("endpoint", ep).Error("Failed to create gRPC connection")
-		return nil
-	}
-
-	p.conn = conn
-	log.WithField("endpoint", ep).Debug("Created gRPC connection")
-	return conn
-}
-
-func (p *grpcConnectionProvider) CurrentHost() string {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-	return p.endpoints[p.currentIndex]
-}
-
-func (p *grpcConnectionProvider) Hosts() []string {
-	// Return a copy to maintain immutability
-	hosts := make([]string, len(p.endpoints))
-	copy(hosts, p.endpoints)
-	return hosts
-}
-
-func (p *grpcConnectionProvider) SwitchHost(index int) error {
-	if index < 0 || index >= len(p.endpoints) {
-		return errors.Errorf("invalid host index %d, must be between 0 and %d", index, len(p.endpoints)-1)
-	}
-
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	if uint64(index) == p.currentIndex {
-		return nil // Already on this host
-	}
-
-	oldHost := p.endpoints[p.currentIndex]
-	oldConn := p.conn
-
-	p.conn = nil // Clear immediately - new connection created lazily
-	p.currentIndex = uint64(index)
-	p.connCounter++
-
-	// Close old connection asynchronously to avoid blocking the caller
-	if oldConn != nil {
-		go func() {
-			if err := oldConn.Close(); err != nil {
-				log.WithError(err).WithField("endpoint", oldHost).Debug("Failed to close previous connection")
-			}
-		}()
-	}
-
-	log.WithFields(logrus.Fields{
-		"previousHost": oldHost,
-		"newHost":      p.endpoints[index],
-	}).Debug("Switched gRPC endpoint")
-	return nil
-}
-
-func (p *grpcConnectionProvider) ConnectionCounter() uint64 {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-	return p.connCounter
-}
-
-func (p *grpcConnectionProvider) Close() {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	if p.closed {
-		return
-	}
-	p.closed = true
-
-	if p.conn != nil {
-		if err := p.conn.Close(); err != nil {
-			log.WithError(err).WithField("endpoint", p.endpoints[p.currentIndex]).Debug("Failed to close gRPC connection")
-		}
-		p.conn = nil
-	}
-}
--- a/api/grpc/grpc_connection_provider_test.go
+++ b/api/grpc/grpc_connection_provider_test.go
@@ -1,207 +0,0 @@
-package grpc
-
-import (
-	"context"
-	"net"
-	"reflect"
-	"strings"
-	"testing"
-
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/credentials/insecure"
-)
-
-func TestParseEndpoints(t *testing.T) {
-	tests := []struct {
-		name     string
-		input    string
-		expected []string
-	}{
-		{"single endpoint", "localhost:4000", []string{"localhost:4000"}},
-		{"multiple endpoints", "host1:4000,host2:4000,host3:4000", []string{"host1:4000", "host2:4000", "host3:4000"}},
-		{"endpoints with spaces", "host1:4000, host2:4000 , host3:4000", []string{"host1:4000", "host2:4000", "host3:4000"}},
-		{"empty string", "", nil},
-		{"only commas", ",,,", []string{}},
-		{"trailing comma", "host1:4000,host2:4000,", []string{"host1:4000", "host2:4000"}},
-		{"leading comma", ",host1:4000,host2:4000", []string{"host1:4000", "host2:4000"}},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got := parseEndpoints(tt.input)
-			if !reflect.DeepEqual(tt.expected, got) {
-				t.Errorf("parseEndpoints(%q) = %v, want %v", tt.input, got, tt.expected)
-			}
-		})
-	}
-}
-
-func TestNewGrpcConnectionProvider_Errors(t *testing.T) {
-	t.Run("no endpoints", func(t *testing.T) {
-		dialOpts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
-		_, err := NewGrpcConnectionProvider(context.Background(), "", dialOpts)
-		require.ErrorContains(t, "no gRPC endpoints provided", err)
-	})
-}
-
-func TestGrpcConnectionProvider_LazyConnection(t *testing.T) {
-	// Start only one server but configure provider with two endpoints
-	lis, err := net.Listen("tcp", "127.0.0.1:0")
-	require.NoError(t, err)
-	server := grpc.NewServer()
-	go func() { _ = server.Serve(lis) }()
-	defer server.Stop()
-
-	validAddr := lis.Addr().String()
-	invalidAddr := "127.0.0.1:1" // Port 1 is unlikely to be listening
-
-	// Provider should succeed even though second endpoint is invalid (lazy connections)
-	endpoint := validAddr + "," + invalidAddr
-	ctx := context.Background()
-	dialOpts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
-	provider, err := NewGrpcConnectionProvider(ctx, endpoint, dialOpts)
-	require.NoError(t, err, "Provider creation should succeed with lazy connections")
-	defer func() { provider.Close() }()
-
-	// First endpoint should work
-	conn := provider.CurrentConn()
-	assert.NotNil(t, conn, "First connection should be created lazily")
-}
-
-func TestGrpcConnectionProvider_SingleConnectionModel(t *testing.T) {
-	// Create provider with 3 endpoints
-	var addrs []string
-	var servers []*grpc.Server
-
-	for range 3 {
-		lis, err := net.Listen("tcp", "127.0.0.1:0")
-		require.NoError(t, err)
-		server := grpc.NewServer()
-		go func() { _ = server.Serve(lis) }()
-		addrs = append(addrs, lis.Addr().String())
-		servers = append(servers, server)
-	}
-	defer func() {
-		for _, s := range servers {
-			s.Stop()
-		}
-	}()
-
-	endpoint := strings.Join(addrs, ",")
-	ctx := context.Background()
-	dialOpts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
-	provider, err := NewGrpcConnectionProvider(ctx, endpoint, dialOpts)
-	require.NoError(t, err)
-	defer func() { provider.Close() }()
-
-	// Access the internal state to verify single connection behavior
-	p := provider.(*grpcConnectionProvider)
-
-	// Initially no connection
-	p.mu.Lock()
-	assert.Equal(t, (*grpc.ClientConn)(nil), p.conn, "Connection should be nil before access")
-	p.mu.Unlock()
-
-	// Access connection - should create one
-	conn0 := provider.CurrentConn()
-	assert.NotNil(t, conn0)
-
-	p.mu.Lock()
-	assert.NotNil(t, p.conn, "Connection should be created after CurrentConn()")
-	firstConn := p.conn
-	p.mu.Unlock()
-
-	// Call CurrentConn again - should return same connection
-	conn0Again := provider.CurrentConn()
-	assert.Equal(t, conn0, conn0Again, "Should return same connection")
-
-	// Switch to different host - old connection should be closed, new one created lazily
-	require.NoError(t, provider.SwitchHost(1))
-
-	p.mu.Lock()
-	assert.Equal(t, (*grpc.ClientConn)(nil), p.conn, "Connection should be nil after SwitchHost (lazy)")
-	p.mu.Unlock()
-
-	// Get new connection
-	conn1 := provider.CurrentConn()
-	assert.NotNil(t, conn1)
-	assert.NotEqual(t, firstConn, conn1, "Should be a different connection after switching hosts")
-}
-
-// testProvider creates a provider with n test servers and returns cleanup function.
-func testProvider(t *testing.T, n int) (GrpcConnectionProvider, []string, func()) {
-	var addrs []string
-	var cleanups []func()
-
-	for range n {
-		lis, err := net.Listen("tcp", "127.0.0.1:0")
-		require.NoError(t, err)
-		server := grpc.NewServer()
-		go func() { _ = server.Serve(lis) }()
-		addrs = append(addrs, lis.Addr().String())
-		cleanups = append(cleanups, server.Stop)
-	}
-
-	endpoint := strings.Join(addrs, ",")
-
-	ctx := context.Background()
-	dialOpts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
-	provider, err := NewGrpcConnectionProvider(ctx, endpoint, dialOpts)
-	require.NoError(t, err)
-
-	cleanup := func() {
-		provider.Close()
-		for _, c := range cleanups {
-			c()
-		}
-	}
-	return provider, addrs, cleanup
-}
-
-func TestGrpcConnectionProvider(t *testing.T) {
-	provider, addrs, cleanup := testProvider(t, 3)
-	defer cleanup()
-
-	t.Run("initial state", func(t *testing.T) {
-		assert.Equal(t, 3, len(provider.Hosts()))
-		assert.Equal(t, addrs[0], provider.CurrentHost())
-		assert.NotNil(t, provider.CurrentConn())
-	})
-
-	t.Run("SwitchHost", func(t *testing.T) {
-		require.NoError(t, provider.SwitchHost(1))
-		assert.Equal(t, addrs[1], provider.CurrentHost())
-		assert.NotNil(t, provider.CurrentConn()) // New connection created lazily
-		require.NoError(t, provider.SwitchHost(0))
-		assert.Equal(t, addrs[0], provider.CurrentHost())
-		require.ErrorContains(t, "invalid host index", provider.SwitchHost(-1))
-		require.ErrorContains(t, "invalid host index", provider.SwitchHost(3))
-	})
-
-	t.Run("SwitchHost circular", func(t *testing.T) {
-		// Test round-robin style switching using SwitchHost with manual index
-		indices := []int{1, 2, 0, 1} // Simulate circular switching
-		for i, idx := range indices {
-			require.NoError(t, provider.SwitchHost(idx))
-			assert.Equal(t, addrs[idx], provider.CurrentHost(), "iteration %d", i)
-		}
-	})
-
-	t.Run("Hosts returns copy", func(t *testing.T) {
-		hosts := provider.Hosts()
-		original := hosts[0]
-		hosts[0] = "modified"
-		assert.Equal(t, original, provider.Hosts()[0])
-	})
-}
-
-func TestGrpcConnectionProvider_Close(t *testing.T) {
-	provider, _, cleanup := testProvider(t, 1)
-	defer cleanup()
-
-	assert.NotNil(t, provider.CurrentConn())
-	provider.Close()
-	assert.Equal(t, (*grpc.ClientConn)(nil), provider.CurrentConn())
-	provider.Close() // Double close is safe
-}
--- a/api/grpc/grpcutils.go
+++ b/api/grpc/grpcutils.go
@@ -15,7 +15,7 @@ import (
 func LogRequests(
 	ctx context.Context,
 	method string, req,
-	reply any,
+	reply interface{},
 	cc *grpc.ClientConn,
 	invoker grpc.UnaryInvoker,
 	opts ...grpc.CallOption,
@@ -32,7 +32,7 @@ func LogRequests(
 	)
 	start := time.Now()
 	err := invoker(ctx, method, req, reply, cc, opts...)
-	log.WithField("backend", header["x-backend"]).
+	logrus.WithField("backend", header["x-backend"]).
 		WithField("method", method).WithField("duration", time.Since(start)).
 		Debug("gRPC request finished.")
 	return err
@@ -58,7 +58,7 @@ func LogStream(
 		grpc.Header(&header),
 	)
 	strm, err := streamer(ctx, sd, conn, method, opts...)
-	log.WithField("backend", header["x-backend"]).
+	logrus.WithField("backend", header["x-backend"]).
 		WithField("method", method).
 		Debug("gRPC stream started.")
 	return strm, err
@@ -71,7 +71,7 @@ func AppendHeaders(parent context.Context, headers []string) context.Context {
 		if h != "" {
 			keyValue := strings.Split(h, "=")
 			if len(keyValue) < 2 {
-				log.Warnf("Incorrect gRPC header flag format. Skipping %v", keyValue[0])
+				logrus.Warnf("Incorrect gRPC header flag format. Skipping %v", keyValue[0])
 				continue
 			}
 			parent = metadata.AppendToOutgoingContext(parent, keyValue[0], strings.Join(keyValue[1:], "=")) // nolint:fatcontext
--- a/api/grpc/grpcutils_test.go
+++ b/api/grpc/grpcutils_test.go
@@ -1,10 +1,11 @@
 package grpc

 import (
+	"context"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"google.golang.org/grpc/metadata"
 )
@@ -15,7 +16,7 @@ type customErrorData struct {

 func TestAppendHeaders(t *testing.T) {
 	t.Run("one_header", func(t *testing.T) {
-		ctx := AppendHeaders(t.Context(), []string{"first=value1"})
+		ctx := AppendHeaders(context.Background(), []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")
@@ -23,7 +24,7 @@ func TestAppendHeaders(t *testing.T) {
 	})

 	t.Run("multiple_headers", func(t *testing.T) {
-		ctx := AppendHeaders(t.Context(), []string{"first=value1", "second=value2"})
+		ctx := AppendHeaders(context.Background(), []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")
@@ -32,7 +33,7 @@ func TestAppendHeaders(t *testing.T) {
 	})

 	t.Run("one_empty_header", func(t *testing.T) {
-		ctx := AppendHeaders(t.Context(), []string{"first=value1", ""})
+		ctx := AppendHeaders(context.Background(), []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")
@@ -41,7 +42,7 @@ func TestAppendHeaders(t *testing.T) {

 	t.Run("incorrect_header", func(t *testing.T) {
 		logHook := logTest.NewGlobal()
-		ctx := AppendHeaders(t.Context(), []string{"first=value1", "second"})
+		ctx := AppendHeaders(context.Background(), []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")
@@ -50,7 +51,7 @@ func TestAppendHeaders(t *testing.T) {
 	})

 	t.Run("header_value_with_equal_sign", func(t *testing.T) {
-		ctx := AppendHeaders(t.Context(), []string{"first=value=1"})
+		ctx := AppendHeaders(context.Background(), []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")
--- a/api/grpc/log.go
+++ b/api/grpc/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package grpc
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/grpc")
--- a/api/grpc/mock_grpc_provider.go
+++ b/api/grpc/mock_grpc_provider.go
@@ -1,27 +0,0 @@
-package grpc
-
-import "google.golang.org/grpc"
-
-// MockGrpcProvider implements GrpcConnectionProvider for testing.
-type MockGrpcProvider struct {
-	MockConn     *grpc.ClientConn
-	MockHosts    []string
-	CurrentIndex int
-	ConnCounter  uint64
-}
-
-func (m *MockGrpcProvider) CurrentConn() *grpc.ClientConn { return m.MockConn }
-func (m *MockGrpcProvider) CurrentHost() string {
-	if len(m.MockHosts) > 0 {
-		return m.MockHosts[m.CurrentIndex]
-	}
-	return ""
-}
-func (m *MockGrpcProvider) Hosts() []string { return m.MockHosts }
-func (m *MockGrpcProvider) SwitchHost(idx int) error {
-	m.CurrentIndex = idx
-	m.ConnCounter++
-	return nil
-}
-func (m *MockGrpcProvider) ConnectionCounter() uint64 { return m.ConnCounter }
-func (m *MockGrpcProvider) Close()                    {}
--- a/api/jwt.go
+++ b/api/jwt.go
@@ -1,9 +1,9 @@
 package api

 import (
-	"github.com/OffchainLabs/prysm/v7/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
--- a/api/jwt_test.go
+++ b/api/jwt_test.go
@@ -3,7 +3,7 @@ package api
 import (
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

 func TestGenerateRandomHexString(t *testing.T) {
--- a/api/pagination/BUILD.bazel
+++ b/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/OffchainLabs/prysm/v7/api/pagination",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/pagination",
    visibility = ["//visibility:public"],
    deps = [
        "//config/params:go_default_library",
--- a/api/pagination/pagination.go
+++ b/api/pagination/pagination.go
@@ -5,8 +5,8 @@ import (
 	"fmt"
 	"strconv"

-	"github.com/OffchainLabs/prysm/v7/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.
--- a/api/pagination/pagination_test.go
+++ b/api/pagination/pagination_test.go
@@ -3,9 +3,9 @@ package pagination_test
 import (
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/api/pagination"
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/api/pagination"
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

 func TestStartAndEndPage(t *testing.T) {
--- a/api/rest/BUILD.bazel
+++ b/api/rest/BUILD.bazel
@@ -1,34 +0,0 @@
-load("@prysm//tools/go:def.bzl", "go_library", "go_test")
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "log.go",
-        "mock_rest_provider.go",
-        "rest_connection_provider.go",
-        "rest_handler.go",
-    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/rest",
-    visibility = ["//visibility:public"],
-    deps = [
-        "//api:go_default_library",
-        "//api/apiutil:go_default_library",
-        "//api/client:go_default_library",
-        "//config/params:go_default_library",
-        "//network/httputil:go_default_library",
-        "//runtime/version:go_default_library",
-        "@com_github_pkg_errors//:go_default_library",
-        "@com_github_sirupsen_logrus//:go_default_library",
-        "@io_opentelemetry_go_contrib_instrumentation_net_http_otelhttp//:go_default_library",
-    ],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = ["rest_connection_provider_test.go"],
-    embed = [":go_default_library"],
-    deps = [
-        "//testing/assert:go_default_library",
-        "//testing/require:go_default_library",
-    ],
-)
--- a/api/rest/log.go
+++ b/api/rest/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package rest
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/rest")
--- a/api/rest/mock_rest_provider.go
+++ b/api/rest/mock_rest_provider.go
@@ -1,46 +0,0 @@
-package rest
-
-import (
-	"bytes"
-	"context"
-	"net/http"
-)
-
-// MockRestProvider implements RestConnectionProvider for testing.
-type MockRestProvider struct {
-	MockClient  *http.Client
-	MockHandler Handler
-	MockHosts   []string
-	HostIndex   int
-}
-
-func (m *MockRestProvider) HttpClient() *http.Client { return m.MockClient }
-func (m *MockRestProvider) Handler() Handler         { return m.MockHandler }
-func (m *MockRestProvider) CurrentHost() string {
-	if len(m.MockHosts) > 0 {
-		return m.MockHosts[m.HostIndex%len(m.MockHosts)]
-	}
-	return ""
-}
-func (m *MockRestProvider) Hosts() []string            { return m.MockHosts }
-func (m *MockRestProvider) SwitchHost(index int) error { m.HostIndex = index; return nil }
-
-// MockHandler implements Handler for testing.
-type MockHandler struct {
-	MockHost string
-}
-
-func (m *MockHandler) Get(_ context.Context, _ string, _ any) error { return nil }
-func (m *MockHandler) GetStatusCode(_ context.Context, _ string) (int, error) {
-	return http.StatusOK, nil
-}
-func (m *MockHandler) GetSSZ(_ context.Context, _ string) ([]byte, http.Header, error) {
-	return nil, nil, nil
-}
-func (m *MockHandler) Post(_ context.Context, _ string, _ map[string]string, _ *bytes.Buffer, _ any) error {
-	return nil
-}
-func (m *MockHandler) PostSSZ(_ context.Context, _ string, _ map[string]string, _ *bytes.Buffer) ([]byte, http.Header, error) {
-	return nil, nil, nil
-}
-func (m *MockHandler) Host() string { return m.MockHost }
--- a/api/rest/rest_connection_provider.go
+++ b/api/rest/rest_connection_provider.go
@@ -1,158 +0,0 @@
-package rest
-
-import (
-	"net/http"
-	"strings"
-	"sync/atomic"
-	"time"
-
-	"github.com/OffchainLabs/prysm/v7/api/client"
-	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
-	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
-)
-
-// RestConnectionProvider manages HTTP client configuration for REST API with failover support.
-// It allows switching between different beacon node REST endpoints when the current one becomes unavailable.
-type RestConnectionProvider interface {
-	// HttpClient returns the configured HTTP client with headers, timeout, and optional tracing.
-	HttpClient() *http.Client
-	// Handler returns the REST handler for making API requests.
-	Handler() Handler
-	// CurrentHost returns the current REST API endpoint URL.
-	CurrentHost() string
-	// Hosts returns all configured REST API endpoint URLs.
-	Hosts() []string
-	// SwitchHost switches to the endpoint at the given index.
-	SwitchHost(index int) error
-}
-
-// RestConnectionProviderOption is a functional option for configuring the REST connection provider.
-type RestConnectionProviderOption func(*restConnectionProvider)
-
-// WithHttpTimeout sets the HTTP client timeout.
-func WithHttpTimeout(timeout time.Duration) RestConnectionProviderOption {
-	return func(p *restConnectionProvider) {
-		p.timeout = timeout
-	}
-}
-
-// WithHttpHeaders sets custom HTTP headers to include in all requests.
-func WithHttpHeaders(headers map[string][]string) RestConnectionProviderOption {
-	return func(p *restConnectionProvider) {
-		p.headers = headers
-	}
-}
-
-// WithTracing enables OpenTelemetry tracing for HTTP requests.
-func WithTracing() RestConnectionProviderOption {
-	return func(p *restConnectionProvider) {
-		p.enableTracing = true
-	}
-}
-
-type restConnectionProvider struct {
-	endpoints     []string
-	httpClient    *http.Client
-	restHandler   *handler
-	currentIndex  atomic.Uint64
-	timeout       time.Duration
-	headers       map[string][]string
-	enableTracing bool
-}
-
-// NewRestConnectionProvider creates a new REST connection provider that manages HTTP client configuration.
-// The endpoint parameter can be a comma-separated list of URLs (e.g., "http://host1:3500,http://host2:3500").
-func NewRestConnectionProvider(endpoint string, opts ...RestConnectionProviderOption) (RestConnectionProvider, error) {
-	endpoints := parseEndpoints(endpoint)
-	if len(endpoints) == 0 {
-		return nil, errors.New("no REST API endpoints provided")
-	}
-
-	p := &restConnectionProvider{
-		endpoints: endpoints,
-	}
-
-	for _, opt := range opts {
-		opt(p)
-	}
-
-	// Build the HTTP transport chain
-	var transport http.RoundTripper = http.DefaultTransport
-
-	// Add custom headers if configured
-	if len(p.headers) > 0 {
-		transport = client.NewCustomHeadersTransport(transport, p.headers)
-	}
-
-	// Add tracing if enabled
-	if p.enableTracing {
-		transport = otelhttp.NewTransport(transport)
-	}
-
-	p.httpClient = &http.Client{
-		Timeout:   p.timeout,
-		Transport: transport,
-	}
-
-	// Create the REST handler with the HTTP client and initial host
-	p.restHandler = newHandler(*p.httpClient, endpoints[0])
-
-	log.WithFields(logrus.Fields{
-		"endpoints": endpoints,
-		"count":     len(endpoints),
-	}).Info("Initialized REST connection provider")
-
-	return p, nil
-}
-
-// parseEndpoints splits a comma-separated endpoint string into individual endpoints.
-func parseEndpoints(endpoint string) []string {
-	if endpoint == "" {
-		return nil
-	}
-	endpoints := make([]string, 0, 1)
-	for p := range strings.SplitSeq(endpoint, ",") {
-		if p = strings.TrimSpace(p); p != "" {
-			endpoints = append(endpoints, p)
-		}
-	}
-	return endpoints
-}
-
-func (p *restConnectionProvider) HttpClient() *http.Client {
-	return p.httpClient
-}
-
-func (p *restConnectionProvider) Handler() Handler {
-	return p.restHandler
-}
-
-func (p *restConnectionProvider) CurrentHost() string {
-	return p.endpoints[p.currentIndex.Load()]
-}
-
-func (p *restConnectionProvider) Hosts() []string {
-	// Return a copy to maintain immutability
-	hosts := make([]string, len(p.endpoints))
-	copy(hosts, p.endpoints)
-	return hosts
-}
-
-func (p *restConnectionProvider) SwitchHost(index int) error {
-	if index < 0 || index >= len(p.endpoints) {
-		return errors.Errorf("invalid host index %d, must be between 0 and %d", index, len(p.endpoints)-1)
-	}
-
-	oldIdx := p.currentIndex.Load()
-	p.currentIndex.Store(uint64(index))
-
-	// Update the rest handler's host
-	p.restHandler.SwitchHost(p.endpoints[index])
-
-	log.WithFields(logrus.Fields{
-		"previousHost": p.endpoints[oldIdx],
-		"newHost":      p.endpoints[index],
-	}).Debug("Switched REST endpoint")
-	return nil
-}
--- a/api/rest/rest_connection_provider_test.go
+++ b/api/rest/rest_connection_provider_test.go
@@ -1,80 +0,0 @@
-package rest
-
-import (
-	"reflect"
-	"testing"
-
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
-)
-
-func TestParseEndpoints(t *testing.T) {
-	tests := []struct {
-		name     string
-		input    string
-		expected []string
-	}{
-		{"single endpoint", "http://localhost:3500", []string{"http://localhost:3500"}},
-		{"multiple endpoints", "http://host1:3500,http://host2:3500,http://host3:3500", []string{"http://host1:3500", "http://host2:3500", "http://host3:3500"}},
-		{"endpoints with spaces", "http://host1:3500, http://host2:3500 , http://host3:3500", []string{"http://host1:3500", "http://host2:3500", "http://host3:3500"}},
-		{"empty string", "", nil},
-		{"only commas", ",,,", []string{}},
-		{"trailing comma", "http://host1:3500,http://host2:3500,", []string{"http://host1:3500", "http://host2:3500"}},
-		{"leading comma", ",http://host1:3500,http://host2:3500", []string{"http://host1:3500", "http://host2:3500"}},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			got := parseEndpoints(tt.input)
-			if !reflect.DeepEqual(tt.expected, got) {
-				t.Errorf("parseEndpoints(%q) = %v, want %v", tt.input, got, tt.expected)
-			}
-		})
-	}
-}
-
-func TestNewRestConnectionProvider_Errors(t *testing.T) {
-	t.Run("no endpoints", func(t *testing.T) {
-		_, err := NewRestConnectionProvider("")
-		require.ErrorContains(t, "no REST API endpoints provided", err)
-	})
-}
-
-func TestRestConnectionProvider(t *testing.T) {
-	provider, err := NewRestConnectionProvider("http://host1:3500,http://host2:3500,http://host3:3500")
-	require.NoError(t, err)
-
-	t.Run("initial state", func(t *testing.T) {
-		assert.Equal(t, 3, len(provider.Hosts()))
-		assert.Equal(t, "http://host1:3500", provider.CurrentHost())
-		assert.NotNil(t, provider.HttpClient())
-	})
-
-	t.Run("SwitchHost", func(t *testing.T) {
-		require.NoError(t, provider.SwitchHost(1))
-		assert.Equal(t, "http://host2:3500", provider.CurrentHost())
-		require.NoError(t, provider.SwitchHost(0))
-		assert.Equal(t, "http://host1:3500", provider.CurrentHost())
-		require.ErrorContains(t, "invalid host index", provider.SwitchHost(-1))
-		require.ErrorContains(t, "invalid host index", provider.SwitchHost(3))
-	})
-
-	t.Run("Hosts returns copy", func(t *testing.T) {
-		hosts := provider.Hosts()
-		original := hosts[0]
-		hosts[0] = "modified"
-		assert.Equal(t, original, provider.Hosts()[0])
-	})
-}
-
-func TestRestConnectionProvider_WithOptions(t *testing.T) {
-	headers := map[string][]string{"Authorization": {"Bearer token"}}
-	provider, err := NewRestConnectionProvider(
-		"http://localhost:3500",
-		WithHttpHeaders(headers),
-		WithHttpTimeout(30000000000), // 30 seconds in nanoseconds
-		WithTracing(),
-	)
-	require.NoError(t, err)
-	assert.NotNil(t, provider.HttpClient())
-	assert.Equal(t, "http://localhost:3500", provider.CurrentHost())
-}
--- a/api/rest/rest_handler.go
+++ b/api/rest/rest_handler.go
@@ -1,319 +0,0 @@
-package rest
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"os"
-	"strings"
-
-	"github.com/OffchainLabs/prysm/v7/api"
-	"github.com/OffchainLabs/prysm/v7/api/apiutil"
-	"github.com/OffchainLabs/prysm/v7/config/params"
-	"github.com/OffchainLabs/prysm/v7/network/httputil"
-	"github.com/OffchainLabs/prysm/v7/runtime/version"
-	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
-)
-
-type reqOption func(*http.Request)
-
-// Handler defines the interface for making REST API requests.
-type Handler interface {
-	Get(ctx context.Context, endpoint string, resp any) error
-	GetStatusCode(ctx context.Context, endpoint string) (int, error)
-	GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error)
-	Post(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer, resp any) error
-	PostSSZ(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer) ([]byte, http.Header, error)
-	Host() string
-}
-
-type handler struct {
-	client       http.Client
-	host         string
-	reqOverrides []reqOption
-}
-
-// newHandler returns a *handler for internal use within the rest package.
-func newHandler(client http.Client, host string) *handler {
-	rh := &handler{
-		client: client,
-		host:   host,
-	}
-	rh.appendAcceptOverride()
-	return rh
-}
-
-// NewHandler returns a Handler
-func NewHandler(client http.Client, host string) Handler {
-	rh := &handler{
-		client: client,
-		host:   host,
-	}
-	rh.appendAcceptOverride()
-	return rh
-}
-
-// appendAcceptOverride enables the Accept header to be customized at runtime via an environment variable.
-// This is specified as an env var because it is a niche option that prysm may use for performance testing or debugging
-// bug which users are unlikely to need. Using an env var keeps the set of user-facing flags cleaner.
-func (c *handler) appendAcceptOverride() {
-	if accept := os.Getenv(params.EnvNameOverrideAccept); accept != "" {
-		c.reqOverrides = append(c.reqOverrides, func(req *http.Request) {
-			req.Header.Set("Accept", accept)
-		})
-	}
-}
-
-// HttpClient returns the underlying HTTP client of the handler
-func (c *handler) HttpClient() *http.Client {
-	return &c.client
-}
-
-// Host returns the underlying HTTP host
-func (c *handler) Host() string {
-	return c.host
-}
-
-// Get sends a GET request and decodes the response body as a JSON object into the passed in object.
-// If an HTTP error is returned, the body is decoded as a DefaultJsonError JSON object and returned as the first return value.
-func (c *handler) Get(ctx context.Context, endpoint string, resp any) error {
-	url := c.host + endpoint
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-	if err != nil {
-		return errors.Wrapf(err, "failed to create request for endpoint %s", url)
-	}
-	req.Header.Set("User-Agent", version.BuildData())
-	httpResp, err := c.client.Do(req)
-	if err != nil {
-		return errors.Wrapf(err, "failed to perform request for endpoint %s", url)
-	}
-	defer func() {
-		if err := httpResp.Body.Close(); err != nil {
-			return
-		}
-	}()
-
-	return decodeResp(httpResp, resp)
-}
-
-// GetStatusCode sends a GET request and returns only the HTTP status code.
-// This is useful for endpoints like /eth/v1/node/health that communicate status via HTTP codes
-// (200 = ready, 206 = syncing, 503 = unavailable) rather than response bodies.
-func (c *handler) GetStatusCode(ctx context.Context, endpoint string) (int, error) {
-	url := c.host + endpoint
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-	if err != nil {
-		return 0, errors.Wrapf(err, "failed to create request for endpoint %s", url)
-	}
-	req.Header.Set("User-Agent", version.BuildData())
-	httpResp, err := c.client.Do(req)
-	if err != nil {
-		return 0, errors.Wrapf(err, "failed to perform request for endpoint %s", url)
-	}
-	defer func() {
-		if err := httpResp.Body.Close(); err != nil {
-			return
-		}
-	}()
-	return httpResp.StatusCode, nil
-}
-
-func (c *handler) GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error) {
-	url := c.host + endpoint
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
-	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to create request for endpoint %s", url)
-	}
-
-	primaryAcceptType := fmt.Sprintf("%s;q=%s", api.OctetStreamMediaType, "0.95")
-	secondaryAcceptType := fmt.Sprintf("%s;q=%s", api.JsonMediaType, "0.9")
-	acceptHeaderString := fmt.Sprintf("%s,%s", primaryAcceptType, secondaryAcceptType)
-	req.Header.Set("Accept", acceptHeaderString)
-
-	for _, o := range c.reqOverrides {
-		o(req)
-	}
-
-	req.Header.Set("User-Agent", version.BuildData())
-	httpResp, err := c.client.Do(req)
-	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to perform request for endpoint %s", url)
-	}
-	defer func() {
-		if err := httpResp.Body.Close(); err != nil {
-			return
-		}
-	}()
-	accept := req.Header.Get("Accept")
-	contentType := httpResp.Header.Get("Content-Type")
-	body, err := io.ReadAll(httpResp.Body)
-	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to read response body for %s", httpResp.Request.URL)
-	}
-
-	if !apiutil.PrimaryAcceptMatches(accept, contentType) {
-		log.WithFields(logrus.Fields{
-			"Accept":       accept,
-			"Content-Type": contentType,
-		}).Debug("Server responded with non primary accept type")
-	}
-
-	// non-2XX codes are a failure
-	if !strings.HasPrefix(httpResp.Status, "2") {
-		decoder := json.NewDecoder(bytes.NewBuffer(body))
-		errorJson := &httputil.DefaultJsonError{}
-		if err = decoder.Decode(errorJson); err != nil {
-			return nil, nil, fmt.Errorf("HTTP request for %s unsuccessful (%d: %s)", httpResp.Request.URL, httpResp.StatusCode, string(body))
-		}
-		return nil, nil, errorJson
-	}
-
-	return body, httpResp.Header, nil
-}
-
-// Post sends a POST request and decodes the response body as a JSON object into the passed in object.
-// If an HTTP error is returned, the body is decoded as a DefaultJsonError JSON object and returned as the first return value.
-func (c *handler) Post(
-	ctx context.Context,
-	apiEndpoint string,
-	headers map[string]string,
-	data *bytes.Buffer,
-	resp any,
-) error {
-	if data == nil {
-		return errors.New("data is nil")
-	}
-
-	url := c.host + apiEndpoint
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, data)
-	if err != nil {
-		return errors.Wrapf(err, "failed to create request for endpoint %s", url)
-	}
-
-	for headerKey, headerValue := range headers {
-		req.Header.Set(headerKey, headerValue)
-	}
-	req.Header.Set("Content-Type", api.JsonMediaType)
-	req.Header.Set("User-Agent", version.BuildData())
-	httpResp, err := c.client.Do(req)
-	if err != nil {
-		return errors.Wrapf(err, "failed to perform request for endpoint %s", url)
-	}
-	defer func() {
-		if err = httpResp.Body.Close(); err != nil {
-			return
-		}
-	}()
-
-	return decodeResp(httpResp, resp)
-}
-
-// PostSSZ sends a POST request and prefers an SSZ (application/octet-stream) response body.
-func (c *handler) PostSSZ(
-	ctx context.Context,
-	apiEndpoint string,
-	headers map[string]string,
-	data *bytes.Buffer,
-) ([]byte, http.Header, error) {
-	if data == nil {
-		return nil, nil, errors.New("data is nil")
-	}
-	url := c.host + apiEndpoint
-	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, data)
-	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to create request for endpoint %s", url)
-	}
-
-	// Accept header: prefer octet-stream (SSZ), fall back to JSON
-	primaryAcceptType := fmt.Sprintf("%s;q=%s", api.OctetStreamMediaType, "0.95")
-	secondaryAcceptType := fmt.Sprintf("%s;q=%s", api.JsonMediaType, "0.9")
-	acceptHeaderString := fmt.Sprintf("%s,%s", primaryAcceptType, secondaryAcceptType)
-	req.Header.Set("Accept", acceptHeaderString)
-
-	// User-supplied headers
-	for headerKey, headerValue := range headers {
-		req.Header.Set(headerKey, headerValue)
-	}
-
-	for _, o := range c.reqOverrides {
-		o(req)
-	}
-	req.Header.Set("Content-Type", api.OctetStreamMediaType)
-	req.Header.Set("User-Agent", version.BuildData())
-	httpResp, err := c.client.Do(req)
-	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to perform request for endpoint %s", url)
-	}
-	defer func() {
-		if err := httpResp.Body.Close(); err != nil {
-			return
-		}
-	}()
-
-	accept := req.Header.Get("Accept")
-	contentType := httpResp.Header.Get("Content-Type")
-	body, err := io.ReadAll(httpResp.Body)
-	if err != nil {
-		return nil, nil, errors.Wrapf(err, "failed to read response body for %s", httpResp.Request.URL)
-	}
-
-	if !apiutil.PrimaryAcceptMatches(accept, contentType) {
-		log.WithFields(logrus.Fields{
-			"Accept":       accept,
-			"Content-Type": contentType,
-		}).Debug("Server responded with non primary accept type")
-	}
-
-	// non-2XX codes are a failure
-	if !strings.HasPrefix(httpResp.Status, "2") {
-		decoder := json.NewDecoder(bytes.NewBuffer(body))
-		errorJson := &httputil.DefaultJsonError{}
-		if err = decoder.Decode(errorJson); err != nil {
-			return nil, nil, fmt.Errorf("HTTP request for %s unsuccessful (%d: %s)", httpResp.Request.URL, httpResp.StatusCode, string(body))
-		}
-		return nil, nil, errorJson
-	}
-
-	return body, httpResp.Header, nil
-}
-
-func decodeResp(httpResp *http.Response, resp any) error {
-	body, err := io.ReadAll(httpResp.Body)
-	if err != nil {
-		return errors.Wrapf(err, "failed to read response body for %s", httpResp.Request.URL)
-	}
-
-	if !strings.Contains(httpResp.Header.Get("Content-Type"), api.JsonMediaType) {
-		// 2XX codes are a success
-		if strings.HasPrefix(httpResp.Status, "2") {
-			return nil
-		}
-		return &httputil.DefaultJsonError{Code: httpResp.StatusCode, Message: string(body)}
-	}
-
-	decoder := json.NewDecoder(bytes.NewBuffer(body))
-	// non-2XX codes are a failure
-	if !strings.HasPrefix(httpResp.Status, "2") {
-		errorJson := &httputil.DefaultJsonError{}
-		if err = decoder.Decode(errorJson); err != nil {
-			return errors.Wrapf(err, "failed to decode response body into error json for %s", httpResp.Request.URL)
-		}
-		return errorJson
-	}
-	// resp is nil for requests that do not return anything.
-	if resp != nil {
-		if err = decoder.Decode(resp); err != nil {
-			return errors.Wrapf(err, "failed to decode response body into json for %s", httpResp.Request.URL)
-		}
-	}
-
-	return nil
-}
-
-func (c *handler) SwitchHost(host string) {
-	c.host = host
-}
--- a/api/server/BUILD.bazel
+++ b/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/OffchainLabs/prysm/v7/api/server",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/server",
    visibility = ["//visibility:public"],
 )

--- a/api/server/error.go
+++ b/api/server/error.go
@@ -6,11 +6,6 @@ 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 {
@@ -34,38 +29,19 @@ func (e *DecodeError) Error() string {
 	return fmt.Sprintf("could not decode %s: %s", strings.Join(e.path, "."), e.err.Error())
 }

-// IndexedErrorContainer wraps a collection of indexed errors.
-type IndexedErrorContainer struct {
-	Message  string          `json:"message"`
-	Code     int             `json:"code"`
-	Failures []*IndexedError `json:"failures"`
+// IndexedVerificationFailureError wraps a collection of verification failures.
+type IndexedVerificationFailureError struct {
+	Message  string                        `json:"message"`
+	Code     int                           `json:"code"`
+	Failures []*IndexedVerificationFailure `json:"failures"`
 }

-func (e *IndexedErrorContainer) StatusCode() int {
+func (e *IndexedVerificationFailureError) StatusCode() int {
 	return e.Code
 }

-// IndexedError represents an issue when processing a single indexed object e.g. an item in an array.
-type IndexedError struct {
+// IndexedVerificationFailure represents an issue when verifying a single indexed object e.g. an item in an array.
+type IndexedVerificationFailure 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())
-}
--- a/api/server/error_test.go
+++ b/api/server/error_test.go
@@ -4,7 +4,7 @@ import (
 	"errors"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/testing/assert"
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
 )

 func TestDecodeError(t *testing.T) {
--- a/api/server/httprest/BUILD.bazel
+++ b/api/server/httprest/BUILD.bazel
@@ -7,7 +7,7 @@ go_library(
        "options.go",
        "server.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/server/httprest",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/server/httprest",
    visibility = ["//visibility:public"],
    deps = [
        "//api/server/middleware:go_default_library",
--- a/api/server/httprest/log.go
+++ b/api/server/httprest/log.go
@@ -1,9 +1,5 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
 package httprest

 import "github.com/sirupsen/logrus"

-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/server/httprest")
+var log = logrus.WithField("prefix", "httprest")
--- a/api/server/httprest/options.go
+++ b/api/server/httprest/options.go
@@ -1,10 +1,11 @@
 package httprest

 import (
-	"net/http"
 	"time"

-	"github.com/OffchainLabs/prysm/v7/api/server/middleware"
+	"net/http"
+
+	"github.com/prysmaticlabs/prysm/v5/api/server/middleware"
 )

 // Option is a http rest server functional parameter type.
--- a/api/server/httprest/server.go
+++ b/api/server/httprest/server.go
@@ -5,9 +5,9 @@ import (
 	"net/http"
 	"time"

-	"github.com/OffchainLabs/prysm/v7/api/server/middleware"
-	"github.com/OffchainLabs/prysm/v7/runtime"
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/api/server/middleware"
+	"github.com/prysmaticlabs/prysm/v5/runtime"
 )

 var _ runtime.Service = (*Server)(nil)
--- a/api/server/httprest/server_test.go
+++ b/api/server/httprest/server_test.go
@@ -1,6 +1,7 @@
 package httprest

 import (
+	"context"
 	"flag"
 	"fmt"
 	"net"
@@ -9,9 +10,9 @@ import (
 	"net/url"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/cmd/beacon-chain/flags"
-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/cmd/beacon-chain/flags"
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"github.com/urfave/cli/v2"
 )
@@ -33,7 +34,7 @@ func TestServer_StartStop(t *testing.T) {
 		WithRouter(handler),
 	}

-	g, err := New(t.Context(), opts...)
+	g, err := New(context.Background(), opts...)
 	require.NoError(t, err)

 	g.Start()
@@ -61,7 +62,7 @@ func TestServer_NilHandler_NotFoundHandlerRegistered(t *testing.T) {
 		WithRouter(handler),
 	}

-	g, err := New(t.Context(), opts...)
+	g, err := New(context.Background(), opts...)
 	require.NoError(t, err)

 	writer := httptest.NewRecorder()
--- a/api/server/middleware/BUILD.bazel
+++ b/api/server/middleware/BUILD.bazel
@@ -3,18 +3,12 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
    name = "go_default_library",
    srcs = [
-        "log.go",
        "middleware.go",
        "util.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/server/middleware",
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/server/middleware",
    visibility = ["//visibility:public"],
-    deps = [
-        "//api:go_default_library",
-        "//api/apiutil:go_default_library",
-        "@com_github_rs_cors//:go_default_library",
-        "@com_github_sirupsen_logrus//:go_default_library",
-    ],
+    deps = ["@com_github_rs_cors//:go_default_library"],
 )

 go_test(
--- a/api/server/middleware/log.go
+++ b/api/server/middleware/log.go
@@ -1,9 +0,0 @@
-// Code generated by hack/gen-logs.sh; DO NOT EDIT.
-// This file is created and regenerated automatically. Anything added here might get removed.
-package middleware
-
-import "github.com/sirupsen/logrus"
-
-// The prefix for logs from this package will be the text after the last slash in the package path.
-// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
-var log = logrus.WithField("package", "api/server/middleware")
--- a/api/server/middleware/middleware.go
+++ b/api/server/middleware/middleware.go
@@ -1,13 +1,10 @@
 package middleware

 import (
-	"compress/gzip"
 	"fmt"
 	"net/http"
 	"strings"

-	"github.com/OffchainLabs/prysm/v7/api"
-	"github.com/OffchainLabs/prysm/v7/api/apiutil"
 	"github.com/rs/cors"
 )

@@ -74,68 +71,47 @@ 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) {
-			if _, ok := apiutil.Negotiate(r.Header.Get("Accept"), serverAcceptedTypes); !ok {
-				http.Error(w, "Not Acceptable", http.StatusNotAcceptable)
+			acceptHeader := r.Header.Get("Accept")
+			// header is optional and should skip if not provided
+			if acceptHeader == "" {
+				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
+				}
+				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 accepted {
+					break
+				}
+			}
+
+			if !accepted {
+				http.Error(w, fmt.Sprintf("Not Acceptable: %s", acceptHeader), 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
-			}
-
-			gz, err := gzip.NewWriterLevel(w, gzip.BestSpeed)
-			if err != nil {
-				next.ServeHTTP(w, r)
-				return
-			}
-			gzipRW := &gzipResponseWriter{gz: gz, ResponseWriter: w}
-			defer func() {
-				if !gzipRW.zip {
-					return
-				}
-				if err := gz.Close(); err != nil {
-					log.WithError(err).Error("Failed to close gzip writer")
-				}
-			}()
-
-			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
--- a/api/server/middleware/middleware_test.go
+++ b/api/server/middleware/middleware_test.go
@@ -1,34 +1,14 @@
 package middleware

 import (
-	"bytes"
-	"compress/gzip"
-	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/api"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/api"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

-// 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"))
@@ -144,90 +124,6 @@ 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"}

--- a/api/server/middleware/util_test.go
+++ b/api/server/middleware/util_test.go
@@ -3,8 +3,8 @@ package middleware
 import (
 	"testing"

-	"github.com/OffchainLabs/prysm/v7/testing/assert"
-	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )

 func TestNormalizeQueryValues(t *testing.T) {
--- a/api/server/structs/BUILD.bazel
+++ b/api/server/structs/BUILD.bazel
@@ -4,16 +4,14 @@ go_library(
    name = "go_default_library",
    srcs = [
        "block.go",
-        "block_execution.go",
        "conversions.go",
        "conversions_blob.go",
        "conversions_block.go",
-        "conversions_block_execution.go",
-        "conversions_gloas.go",
        "conversions_lightclient.go",
        "conversions_state.go",
        "endpoints_beacon.go",
        "endpoints_blob.go",
+        "endpoints_builder.go",
        "endpoints_config.go",
        "endpoints_debug.go",
        "endpoints_events.go",
@@ -24,19 +22,17 @@ go_library(
        "other.go",
        "state.go",
    ],
-    importpath = "github.com/OffchainLabs/prysm/v7/api/server/structs",
+    importpath = "github.com/prysmaticlabs/prysm/v5/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",
@@ -46,25 +42,15 @@ 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",
    ],
 )

 go_test(
    name = "go_default_test",
-    srcs = [
-        "conversions_block_execution_test.go",
-        "conversions_test.go",
-    ],
+    srcs = ["conversions_test.go"],
    embed = [":go_default_library"],
    deps = [
-        "//consensus-types/blocks:go_default_library",
-        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
-        "//testing/assert:go_default_library",
        "//testing/require:go_default_library",
-        "//testing/util:go_default_library",
-        "@com_github_ethereum_go_ethereum//common:go_default_library",
-        "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
    ],
 )
--- a/Show More
+++ b/Show More