Paralellize commitment computation

- Also fix --rlnc-block-chunks flag to pass it on the validator - Add a feature flag --rlnc-mesh-size to configure at runtime to how many peers we send chunks.
add benches
2026-01-11 06:18:05 -05:00 · 2025-05-15 14:28:09 -03:00 · 2025-05-15 11:37:30 -03:00 · 2025-05-14 14:20:50 -03:00 · 2025-05-13 16:22:56 -03:00 · 2025-05-13 15:37:07 -03:00
515 changed files with 79113 additions and 34875 deletions
--- a/.github/workflows/clang-format.yml
+++ b/.github/workflows/clang-format.yml
@@ -1,21 +0,0 @@
-name: Protobuf Format
-
-on: 
-  push:
-    branches: [ '*' ]
-  pull_request:
-    branches: [ '*' ]
-  merge_group:
-    types: [checks_requested]
-
-jobs:
-  clang-format-checking:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      # Is this step failing for you? 
-      # Run: clang-format -i proto/**/*.proto
-      # See: https://clang.llvm.org/docs/ClangFormat.html
-      - uses: RafikFarhad/clang-format-github-action@v3
-        with:
-          sources: "proto/**/*.proto"
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,7 +60,7 @@ Notable features:
 - Updated the default `scrape-interval` in `Client-stats` to 2 minutes to accommodate Beaconcha.in API rate limits.
 - Switch to compounding when consolidating with source==target.
 - Revert block db save when saving state fails.
- Return false from HasBlock if the block is being synced.
+- Return false from HasBlock if the block is being synced. 
 - Cleanup forkchoice on failed insertions.
 - Use read only validator for core processing to avoid unnecessary copying.
 - Use ROBlock across block processing pipeline.
@@ -73,7 +73,7 @@ Notable features:
 - Simplified `EjectedValidatorIndices`.
 - `engine_newPayloadV4`,`engine_getPayloadV4` are changes due to new execution request serialization decisions, [PR](https://github.com/prysmaticlabs/prysm/pull/14580)
 - Fixed various small things in state-native code.
- Use ROBlock earlier in block syncing pipeline.
+- Use ROBlock earlier in block syncing pipeline. 
 - Changed the signature of `ProcessPayload`.
 - Only Build the Protobuf state once during serialization.
 - Capella blocks are execution.
@@ -139,9 +139,9 @@ Notable features:

 ### Security

-## [v5.1.2](https://github.com/prysmaticlabs/prysm/compare/v5.1.1...v5.1.2) - 2024-10-16
+## [v5.1.2](https://github.com/prysmaticlabs/prysm/compare/v5.1.1...v5.1.2) - 2024-10-16 

-This is a hotfix release with one change.
+This is a hotfix release with one change. 

 Prysm v5.1.1 contains an updated implementation of the beacon api streaming events endpoint. This
 new implementation contains a bug that can cause a panic in certain conditions. The issue is
@@ -153,20 +153,20 @@ prysm REST mode validator (a feature which requires the validator to be configur
 api instead of prysm's stock grpc endpoints) or accessory software that connects to the events api,
 like https://github.com/ethpandaops/ethereum-metrics-exporter

-### Fixed
+### Fixed 

 - Recover from panics when writing the event stream [#14545](https://github.com/prysmaticlabs/prysm/pull/14545)

 ## [v5.1.1](https://github.com/prysmaticlabs/prysm/compare/v5.1.0...v5.1.1) - 2024-10-15

-This release has a number of features and improvements. Most notably, the feature flag
-`--enable-experimental-state` has been flipped to "opt out" via `--disable-experimental-state`.
+This release has a number of features and improvements. Most notably, the feature flag 
+`--enable-experimental-state` has been flipped to "opt out" via `--disable-experimental-state`. 
 The experimental state management design has shown significant improvements in memory usage at
 runtime. Updates to libp2p's gossipsub have some bandwidith stability improvements with support for
-IDONTWANT control messages.
+IDONTWANT control messages. 

 The gRPC gateway has been deprecated from Prysm in this release. If you need JSON data, consider the
-standardized beacon-APIs.
+standardized beacon-APIs. 

 Updating to this release is recommended at your convenience.

@@ -208,7 +208,7 @@ Updating to this release is recommended at your convenience.
 - `grpc-gateway-corsdomain` is renamed to http-cors-domain. The old name can still be used as an alias.
 - `api-timeout` is changed from int flag to duration flag, default value updated.
 - Light client support: abstracted out the light client headers with different versions.
- `ApplyToEveryValidator` has been changed to prevent misuse bugs, it takes a closure that takes a `ReadOnlyValidator` and returns a raw pointer to a `Validator`.
+- `ApplyToEveryValidator` has been changed to prevent misuse bugs, it takes a closure that takes a `ReadOnlyValidator` and returns a raw pointer to a `Validator`. 
 - Removed gorilla mux library and replaced it with net/http updates in go 1.22.
 - Clean up `ProposeBlock` for validator client to reduce cognitive scoring and enable further changes.
 - Updated k8s-io/client-go to v0.30.4 and k8s-io/apimachinery to v0.30.4
@@ -219,7 +219,7 @@ Updating to this release is recommended at your convenience.
 - Updated Sepolia bootnodes.
 - Make committee aware packing the default by deprecating `--enable-committee-aware-packing`.
 - Moved `ConvertKzgCommitmentToVersionedHash` to the `primitives` package.
- Updated correlation penalty for EIP-7251.
+- Updated correlation penalty for EIP-7251. 

 ### Deprecated
 - `--disable-grpc-gateway` flag is deprecated due to grpc gateway removal.
@@ -693,34 +693,34 @@ AVX support (eg Celeron) after the Deneb fork. This is not an issue for mainnet.

 - Linter: Wastedassign linter enabled to improve code quality.
 - API Enhancements:
-  - Added payload return in Wei for /eth/v3/validator/blocks.
-  - Added Holesky Deneb Epoch for better epoch management.
+    - Added payload return in Wei for /eth/v3/validator/blocks.
+    - Added Holesky Deneb Epoch for better epoch management.
 - Testing Enhancements:
-  - Clear cache in tests of core helpers to ensure test reliability.
-  - Added Debug State Transition Method for improved debugging.
-  - Backfilling test: Enabled backfill in E2E tests for more comprehensive coverage.
+    - Clear cache in tests of core helpers to ensure test reliability.
+    - Added Debug State Transition Method for improved debugging.
+    - Backfilling test: Enabled backfill in E2E tests for more comprehensive coverage.
 - API Updates: Re-enabled jwt on keymanager API for enhanced security.
 - Logging Improvements: Enhanced block by root log for better traceability.
 - Validator Client Improvements:
-  - Added Spans to Core Validator Methods for enhanced monitoring.
-  - Improved readability in validator client code for better maintenance (various commits).
+    - Added Spans to Core Validator Methods for enhanced monitoring.
+    - Improved readability in validator client code for better maintenance (various commits).

 ### Changed

 - Optimizations and Refinements:
-  - Lowered resource usage in certain processes for efficiency.
-  - Moved blob rpc validation closer to peer read for optimized processing.
-  - Cleaned up validate beacon block code for clarity and efficiency.
-  - Updated Sepolia Deneb fork epoch for alignment with network changes.
-  - Changed blob latency metrics to milliseconds for more precise measurement.
-  - Altered getLegacyDatabaseLocation message for better clarity.
-  - Improved wait for activation method for enhanced performance.
-  - Capitalized Aggregated Unaggregated Attestations Log for consistency.
-  - Modified HistoricalRoots usage for accuracy.
-  - Adjusted checking of attribute emptiness for efficiency.
+    - Lowered resource usage in certain processes for efficiency.
+    - Moved blob rpc validation closer to peer read for optimized processing.
+    - Cleaned up validate beacon block code for clarity and efficiency.
+    - Updated Sepolia Deneb fork epoch for alignment with network changes.
+    - Changed blob latency metrics to milliseconds for more precise measurement.
+    - Altered getLegacyDatabaseLocation message for better clarity.
+    - Improved wait for activation method for enhanced performance.
+    - Capitalized Aggregated Unaggregated Attestations Log for consistency.
+    - Modified HistoricalRoots usage for accuracy.
+    - Adjusted checking of attribute emptiness for efficiency.
 - Database Management:
-  - Moved --db-backup-output-dir as a deprecated flag for database management simplification.
-  - Added the Ability to Defragment the Beacon State for improved database performance.
+    - Moved --db-backup-output-dir as a deprecated flag for database management simplification.
+    - Added the Ability to Defragment the Beacon State for improved database performance.
 - Dependency Update: Bumped quic-go version from 0.39.3 to 0.39.4 for up-to-date dependencies.

 ### Removed
@@ -731,12 +731,12 @@ AVX support (eg Celeron) after the Deneb fork. This is not an issue for mainnet.
 ### Fixed

 - Bug Fixes:
-  - Fixed off by one error for improved accuracy.
-  - Resolved small typo in error messages for clarity.
-  - Addressed minor issue in blsToExecChange validator for better validation.
-  - Corrected blobsidecar json tag for commitment inclusion proof.
-  - Fixed ssz post-requests content type check.
-  - Resolved issue with port logging in bootnode.
+    - Fixed off by one error for improved accuracy.
+    - Resolved small typo in error messages for clarity.
+    - Addressed minor issue in blsToExecChange validator for better validation.
+    - Corrected blobsidecar json tag for commitment inclusion proof.
+    - Fixed ssz post-requests content type check.
+    - Resolved issue with port logging in bootnode.
 - Test Fixes: Re-enabled Slasher E2E Test for more comprehensive testing.

 ### Security
@@ -1163,9 +1163,9 @@ No security issues in this release.
  now features runtime detection, automatically enabling optimized code paths if your CPU supports it.
 - **Multiarch Containers Preview Available**: multiarch (:wave: arm64 support :wave:) containers will be offered for
  preview at the following locations:
-  - Beacon Chain: [gcr.io/prylabs-dev/prysm/beacon-chain:v4.1.0](gcr.io/prylabs-dev/prysm/beacon-chain:v4.1.0)
-  - Validator: [gcr.io/prylabs-dev/prysm/validator:v4.1.0](gcr.io/prylabs-dev/prysm/validator:v4.1.0)
-  - Please note that in the next cycle, we will exclusively use these containers at the canonical URLs.
+    - Beacon Chain: [gcr.io/prylabs-dev/prysm/beacon-chain:v4.1.0](gcr.io/prylabs-dev/prysm/beacon-chain:v4.1.0)
+    - Validator: [gcr.io/prylabs-dev/prysm/validator:v4.1.0](gcr.io/prylabs-dev/prysm/validator:v4.1.0)
+    - Please note that in the next cycle, we will exclusively use these containers at the canonical URLs.

 ### Added

@@ -2987,4 +2987,4 @@ There are no security updates in this release.

 # Older than v2.0.0

-For changelog history for releases older than v2.0.0, please refer to https://github.com/prysmaticlabs/prysm/releases
+For changelog history for releases older than v2.0.0, please refer to https://github.com/prysmaticlabs/prysm/releases
--- a/10
+++ b/10
@@ -255,7 +255,7 @@ filegroup(
    url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )

-consensus_spec_version = "v1.5.0-beta.1"
+consensus_spec_version = "v1.5.0-beta.0"

 bls_test_version = "v0.1.1"

@@ -271,7 +271,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    integrity = "sha256-R6r60geCfEjMaB1Ag3svaMFXFIgaJvkTJhfKsf76rFE=",
+    integrity = "sha256-HdMlTN3wv+hUMCkIRPk+EHcLixY1cSZlvkx3obEp4AM=",
    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
 )

@@ -287,7 +287,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    integrity = "sha256-2Pem2gMHxW/6bBhZ2BaqkQruQSd/dTS3WMaMQO8rZ/o=",
+    integrity = "sha256-eX/ihmHQ+OvfoGJxSMgy22yAU3SZ3xjsX0FU0EaZrSs=",
    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
 )

@@ -303,7 +303,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    integrity = "sha256-5yP05JTV1MhcUZ2kSh+T+kXjG+uW3A5877veC5c1mD4=",
+    integrity = "sha256-k3Onf42vOzIqyddecR6G82sDy3mmDA+R8RN66QjB0GI=",
    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )

@@ -318,7 +318,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    integrity = "sha256-O6Rg6h19T0RsJs0sBDZ9O1k4LnCJ/gu2ilHijFBVfME=",
+    integrity = "sha256-N/d4AwdOSlb70Dr+2l20dfXxNSzJDj/qKA9Rkn8Gb5w=",
    strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
    url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )
--- a/api/client/beacon/BUILD.bazel
+++ b/api/client/beacon/BUILD.bazel
@@ -5,7 +5,6 @@ go_library(
    srcs = [
        "checkpoint.go",
        "client.go",
-        "client_epbs.go",
        "doc.go",
        "health.go",
        "log.go",
--- a/api/client/beacon/client.go
+++ b/api/client/beacon/client.go
@@ -35,7 +35,6 @@ const (
 	getStatePath             = "/eth/v2/debug/beacon/states"
 	getNodeVersionPath       = "/eth/v1/node/version"
 	changeBLStoExecutionPath = "/eth/v1/beacon/pool/bls_to_execution_changes"
-	getPayloadEnvelopePath   = "/eth/v1/beacon/execution_payload"
 )

 // StateOrBlockId represents the block_id / state_id parameters that several of the Eth Beacon API methods accept.
--- a/api/client/beacon/client_epbs.go
+++ b/api/client/beacon/client_epbs.go
@@ -1,22 +0,0 @@
-package beacon
-
-import (
-	"context"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/api/client"
-)
-
-// GetExecutionPayload retrieves the SignedExecutionPayloadEnvelope 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
-// for the named identifiers.
-// The return value contains the ssz-encoded bytes.
-func (c *Client) GetExecutionPayload(ctx context.Context, blockId StateOrBlockId) ([]byte, error) {
-	blockPath := renderGetBlockPath(blockId)
-	b, err := c.Get(ctx, blockPath, client.WithSSZEncoding())
-	if err != nil {
-		return nil, errors.Wrapf(err, "error requesting execuction payload by id = %s", blockId)
-	}
-	return b, nil
-}
--- a/api/server/structs/BUILD.bazel
+++ b/api/server/structs/BUILD.bazel
@@ -4,14 +4,11 @@ go_library(
    name = "go_default_library",
    srcs = [
        "block.go",
-        "block_epbs.go",
        "conversions.go",
        "conversions_blob.go",
        "conversions_block.go",
        "conversions_lightclient.go",
        "conversions_state.go",
-        "conversions_state_epbs.go",
-        "converstions_block_epbs.go",
        "endpoints_beacon.go",
        "endpoints_blob.go",
        "endpoints_builder.go",
@@ -24,7 +21,6 @@ go_library(
        "endpoints_validator.go",
        "other.go",
        "state.go",
-        "state_epbs.go",
    ],
    importpath = "github.com/prysmaticlabs/prysm/v5/api/server/structs",
    visibility = ["//visibility:public"],
@@ -32,7 +28,6 @@ go_library(
        "//api/server:go_default_library",
        "//beacon-chain/state:go_default_library",
        "//config/fieldparams:go_default_library",
-        "//config/params:go_default_library",
        "//consensus-types/interfaces:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//consensus-types/validator:go_default_library",
--- a/api/server/structs/block_epbs.go
+++ b/api/server/structs/block_epbs.go
@@ -1,93 +0,0 @@
-package structs
-
-import "encoding/json"
-
-// ----------------------------------------------------------------------------
-// Epbs
-// ----------------------------------------------------------------------------
-type SignedBeaconBlockEpbs struct {
-	Message   *BeaconBlockEpbs `json:"message"`
-	Signature string           `json:"signature"`
-}
-
-var _ SignedMessageJsoner = &SignedBeaconBlockElectra{}
-
-func (s *SignedBeaconBlockEpbs) MessageRawJson() ([]byte, error) {
-	return json.Marshal(s.Message)
-}
-
-func (s *SignedBeaconBlockEpbs) SigString() string {
-	return s.Signature
-}
-
-type BeaconBlockEpbs struct {
-	Slot          string               `json:"slot"`
-	ProposerIndex string               `json:"proposer_index"`
-	ParentRoot    string               `json:"parent_root"`
-	StateRoot     string               `json:"state_root"`
-	Body          *BeaconBlockBodyEpbs `json:"body"`
-}
-
-type BeaconBlockBodyEpbs struct {
-	RandaoReveal                 string                        `json:"randao_reveal"`
-	Eth1Data                     *Eth1Data                     `json:"eth1_data"`
-	Graffiti                     string                        `json:"graffiti"`
-	ProposerSlashings            []*ProposerSlashing           `json:"proposer_slashings"`
-	AttesterSlashings            []*AttesterSlashingElectra    `json:"attester_slashings"`
-	Attestations                 []*AttestationElectra         `json:"attestations"`
-	Deposits                     []*Deposit                    `json:"deposits"`
-	VoluntaryExits               []*SignedVoluntaryExit        `json:"voluntary_exits"`
-	SyncAggregate                *SyncAggregate                `json:"sync_aggregate"`
-	BLSToExecutionChanges        []*SignedBLSToExecutionChange `json:"bls_to_execution_changes"`
-	SignedExecutionPayloadHeader *SignedExecutionPayloadHeader `json:"signed_execution_payload_header"`
-	PayloadAttestations          []*PayloadAttestation         `json:"payload_attestations"`
-}
-
-type SignedExecutionPayloadEnvelope struct {
-	Message   *ExecutionPayloadEnvelope `json:"message"`
-	Signature string                    `json:"signature"`
-}
-
-type ExecutionPayloadEnvelope struct {
-	Payload            *ExecutionPayloadDeneb `json:"payload"`
-	ExecutionRequests  *ExecutionRequests     `json:"execution_requests"`
-	BuilderIndex       string                 `json:"builder_index"`
-	BeaconBlockRoot    string                 `json:"beacon_block_root"`
-	Slot               string                 `json:"slot"`
-	BlobKzgCommitments []string               `json:"blob_kzg_commitments"`
-	StateRoot          string                 `json:"state_root"`
-}
-type SignedExecutionPayloadHeader struct {
-	Message   *ExecutionPayloadHeaderEPBS `json:"message"`
-	Signature string                      `json:"signature"`
-}
-
-type ExecutionPayloadHeaderEPBS struct {
-	ParentBlockHash        string `json:"parent_block_hash"`
-	ParentBlockRoot        string `json:"parent_block_root"`
-	BlockHash              string `json:"block_hash"`
-	GasLimit               string `json:"gas_limit"`
-	BuilderIndex           string `json:"builder_index"`
-	Slot                   string `json:"slot"`
-	Value                  string `json:"value"`
-	BlobKzgCommitmentsRoot string `json:"blob_kzg_commitments_root"`
-}
-
-type PayloadAttestation struct {
-	AggregationBits string                  `json:"aggregation_bits"`
-	Data            *PayloadAttestationData `json:"data"`
-	Signature       string                  `json:"signature"`
-}
-
-type PayloadAttestationData struct {
-	BeaconBlockRoot string `json:"beacon_block_root"`
-	Slot            string `json:"slot"`
-	PayloadStatus   string `json:"payload_status"`
-}
-
-type GetExecutionPayloadV1Response struct {
-	Version             string                          `json:"version"`
-	ExecutionOptimistic bool                            `json:"execution_optimistic"`
-	Finalized           bool                            `json:"finalized"`
-	Data                *SignedExecutionPayloadEnvelope `json:"data"`
-}
--- a/api/server/structs/conversions.go
+++ b/api/server/structs/conversions.go
@@ -9,7 +9,6 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/api/server"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/validator"
 	"github.com/prysmaticlabs/prysm/v5/container/slice"
@@ -244,7 +243,7 @@ func (c *ContributionAndProof) ToConsensus() (*eth.ContributionAndProof, error)
 	if err != nil {
 		return nil, server.NewDecodeError(err, "AggregatorIndex")
 	}
-	selectionProof, err := bytesutil.DecodeHexWithLength(c.SelectionProof, fieldparams.BLSSignatureLength)
+	selectionProof, err := bytesutil.DecodeHexWithLength(c.SelectionProof, 96)
 	if err != nil {
 		return nil, server.NewDecodeError(err, "SelectionProof")
 	}
@@ -331,7 +330,7 @@ func (a *AggregateAttestationAndProof) ToConsensus() (*eth.AggregateAttestationA
 	if err != nil {
 		return nil, server.NewDecodeError(err, "Aggregate")
 	}
-	proof, err := bytesutil.DecodeHexWithLength(a.SelectionProof, fieldparams.BLSSignatureLength)
+	proof, err := bytesutil.DecodeHexWithLength(a.SelectionProof, 96)
 	if err != nil {
 		return nil, server.NewDecodeError(err, "SelectionProof")
 	}
@@ -367,7 +366,7 @@ func (a *AggregateAttestationAndProofElectra) ToConsensus() (*eth.AggregateAttes
 	if err != nil {
 		return nil, server.NewDecodeError(err, "Aggregate")
 	}
-	proof, err := bytesutil.DecodeHexWithLength(a.SelectionProof, fieldparams.BLSSignatureLength)
+	proof, err := bytesutil.DecodeHexWithLength(a.SelectionProof, 96)
 	if err != nil {
 		return nil, server.NewDecodeError(err, "SelectionProof")
 	}
@@ -735,10 +734,6 @@ func (s *AttesterSlashingElectra) ToConsensus() (*eth.AttesterSlashingElectra, e
 }

 func (a *IndexedAttestation) ToConsensus() (*eth.IndexedAttestation, error) {
-	if err := slice.VerifyMaxLength(a.AttestingIndices, params.BeaconConfig().MaxValidatorsPerCommittee); err != nil {
-		return nil, err
-	}
-
 	indices := make([]uint64, len(a.AttestingIndices))
 	var err error
 	for i, ix := range a.AttestingIndices {
@@ -764,13 +759,6 @@ func (a *IndexedAttestation) ToConsensus() (*eth.IndexedAttestation, error) {
 }

 func (a *IndexedAttestationElectra) ToConsensus() (*eth.IndexedAttestationElectra, error) {
-	if err := slice.VerifyMaxLength(
-		a.AttestingIndices,
-		params.BeaconConfig().MaxValidatorsPerCommittee*params.BeaconConfig().MaxCommitteesPerSlot,
-	); err != nil {
-		return nil, err
-	}
-
 	indices := make([]uint64, len(a.AttestingIndices))
 	var err error
 	for i, ix := range a.AttestingIndices {
@@ -1201,7 +1189,7 @@ func AttesterSlashingsElectraToConsensus(src []*AttesterSlashingElectra) ([]*eth
 	if src == nil {
 		return nil, errNilValue
 	}
-	err := slice.VerifyMaxLength(src, fieldparams.MaxAttesterSlashingsElectra)
+	err := slice.VerifyMaxLength(src, 2)
 	if err != nil {
 		return nil, err
 	}
@@ -1222,7 +1210,7 @@ func AttesterSlashingsElectraToConsensus(src []*AttesterSlashingElectra) ([]*eth
 		if err != nil {
 			return nil, server.NewDecodeError(err, fmt.Sprintf("[%d].Attestation1.Signature", i))
 		}
-		err = slice.VerifyMaxLength(s.Attestation1.AttestingIndices, params.BeaconConfig().MaxValidatorsPerCommittee*params.BeaconConfig().MaxCommitteesPerSlot)
+		err = slice.VerifyMaxLength(s.Attestation1.AttestingIndices, 2048)
 		if err != nil {
 			return nil, server.NewDecodeError(err, fmt.Sprintf("[%d].Attestation1.AttestingIndices", i))
 		}
@@ -1242,7 +1230,7 @@ func AttesterSlashingsElectraToConsensus(src []*AttesterSlashingElectra) ([]*eth
 		if err != nil {
 			return nil, server.NewDecodeError(err, fmt.Sprintf("[%d].Attestation2.Signature", i))
 		}
-		err = slice.VerifyMaxLength(s.Attestation2.AttestingIndices, params.BeaconConfig().MaxValidatorsPerCommittee*params.BeaconConfig().MaxCommitteesPerSlot)
+		err = slice.VerifyMaxLength(s.Attestation2.AttestingIndices, 2048)
 		if err != nil {
 			return nil, server.NewDecodeError(err, fmt.Sprintf("[%d].Attestation2.AttestingIndices", i))
 		}
--- a/api/server/structs/conversions_block.go
+++ b/api/server/structs/conversions_block.go
@@ -9,7 +9,6 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/api/server"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/container/slice"
@@ -269,8 +268,6 @@ func SignedBeaconBlockMessageJsoner(block interfaces.ReadOnlySignedBeaconBlock)
 		return SignedBlindedBeaconBlockFuluFromConsensus(pbStruct)
 	case *eth.SignedBeaconBlockFulu:
 		return SignedBeaconBlockFuluFromConsensus(pbStruct)
-	case *eth.SignedBeaconBlockEpbs:
-		return SignedBeaconBlockEpbsFromConsensus(pbStruct)
 	default:
 		return nil, ErrUnsupportedConversion
 	}
@@ -2522,7 +2519,6 @@ func (b *BeaconBlockContentsElectra) ToConsensus() (*eth.BeaconBlockContentsElec
 	}, nil
 }

-// nolint:gocognit
 func (b *BeaconBlockElectra) ToConsensus() (*eth.BeaconBlockElectra, error) {
 	if b == nil {
 		return nil, errNilValue
@@ -2710,9 +2706,6 @@ func (b *BeaconBlockElectra) ToConsensus() (*eth.BeaconBlockElectra, error) {
 		return nil, server.NewDecodeError(errors.New("nil execution requests"), "Body.ExequtionRequests")
 	}

-	if err = slice.VerifyMaxLength(b.Body.ExecutionRequests.Deposits, params.BeaconConfig().MaxDepositRequestsPerPayload); err != nil {
-		return nil, err
-	}
 	depositRequests := make([]*enginev1.DepositRequest, len(b.Body.ExecutionRequests.Deposits))
 	for i, d := range b.Body.ExecutionRequests.Deposits {
 		depositRequests[i], err = d.ToConsensus()
@@ -2721,9 +2714,6 @@ func (b *BeaconBlockElectra) ToConsensus() (*eth.BeaconBlockElectra, error) {
 		}
 	}

-	if err = slice.VerifyMaxLength(b.Body.ExecutionRequests.Withdrawals, params.BeaconConfig().MaxWithdrawalRequestsPerPayload); err != nil {
-		return nil, err
-	}
 	withdrawalRequests := make([]*enginev1.WithdrawalRequest, len(b.Body.ExecutionRequests.Withdrawals))
 	for i, w := range b.Body.ExecutionRequests.Withdrawals {
 		withdrawalRequests[i], err = w.ToConsensus()
@@ -2732,9 +2722,6 @@ func (b *BeaconBlockElectra) ToConsensus() (*eth.BeaconBlockElectra, error) {
 		}
 	}

-	if err = slice.VerifyMaxLength(b.Body.ExecutionRequests.Consolidations, params.BeaconConfig().MaxConsolidationsRequestsPerPayload); err != nil {
-		return nil, err
-	}
 	consolidationRequests := make([]*enginev1.ConsolidationRequest, len(b.Body.ExecutionRequests.Consolidations))
 	for i, c := range b.Body.ExecutionRequests.Consolidations {
 		consolidationRequests[i], err = c.ToConsensus()
@@ -3016,14 +3003,9 @@ func (b *BlindedBeaconBlockElectra) ToConsensus() (*eth.BlindedBeaconBlockElectr
 	if err != nil {
 		return nil, server.NewDecodeError(err, "Body.ExecutionPayload.ExcessBlobGas")
 	}
-
 	if b.Body.ExecutionRequests == nil {
 		return nil, server.NewDecodeError(errors.New("nil execution requests"), "Body.ExecutionRequests")
 	}
-
-	if err = slice.VerifyMaxLength(b.Body.ExecutionRequests.Deposits, params.BeaconConfig().MaxDepositRequestsPerPayload); err != nil {
-		return nil, err
-	}
 	depositRequests := make([]*enginev1.DepositRequest, len(b.Body.ExecutionRequests.Deposits))
 	for i, d := range b.Body.ExecutionRequests.Deposits {
 		depositRequests[i], err = d.ToConsensus()
@@ -3032,9 +3014,6 @@ func (b *BlindedBeaconBlockElectra) ToConsensus() (*eth.BlindedBeaconBlockElectr
 		}
 	}

-	if err = slice.VerifyMaxLength(b.Body.ExecutionRequests.Withdrawals, params.BeaconConfig().MaxWithdrawalRequestsPerPayload); err != nil {
-		return nil, err
-	}
 	withdrawalRequests := make([]*enginev1.WithdrawalRequest, len(b.Body.ExecutionRequests.Withdrawals))
 	for i, w := range b.Body.ExecutionRequests.Withdrawals {
 		withdrawalRequests[i], err = w.ToConsensus()
@@ -3043,9 +3022,6 @@ func (b *BlindedBeaconBlockElectra) ToConsensus() (*eth.BlindedBeaconBlockElectr
 		}
 	}

-	if err = slice.VerifyMaxLength(b.Body.ExecutionRequests.Consolidations, params.BeaconConfig().MaxConsolidationsRequestsPerPayload); err != nil {
-		return nil, err
-	}
 	consolidationRequests := make([]*enginev1.ConsolidationRequest, len(b.Body.ExecutionRequests.Consolidations))
 	for i, c := range b.Body.ExecutionRequests.Consolidations {
 		consolidationRequests[i], err = c.ToConsensus()
--- a/api/server/structs/conversions_state_epbs.go
+++ b/api/server/structs/conversions_state_epbs.go
@@ -1,205 +0,0 @@
-package structs
-
-import (
-	"fmt"
-
-	"github.com/ethereum/go-ethereum/common/hexutil"
-	beaconState "github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-)
-
-// ----------------------------------------------------------------------------
-// Fulu
-// ----------------------------------------------------------------------------
-
-func BeaconStateEPBSFromConsensus(st beaconState.BeaconState) (*BeaconStateEPBS, error) {
-	srcBr := st.BlockRoots()
-	br := make([]string, len(srcBr))
-	for i, r := range srcBr {
-		br[i] = hexutil.Encode(r)
-	}
-	srcSr := st.StateRoots()
-	sr := make([]string, len(srcSr))
-	for i, r := range srcSr {
-		sr[i] = hexutil.Encode(r)
-	}
-	srcHr, err := st.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
-	hr := make([]string, len(srcHr))
-	for i, r := range srcHr {
-		hr[i] = hexutil.Encode(r)
-	}
-	srcVotes := st.Eth1DataVotes()
-	votes := make([]*Eth1Data, len(srcVotes))
-	for i, e := range srcVotes {
-		votes[i] = Eth1DataFromConsensus(e)
-	}
-	srcVals := st.Validators()
-	vals := make([]*Validator, len(srcVals))
-	for i, v := range srcVals {
-		vals[i] = ValidatorFromConsensus(v)
-	}
-	srcBals := st.Balances()
-	bals := make([]string, len(srcBals))
-	for i, b := range srcBals {
-		bals[i] = fmt.Sprintf("%d", b)
-	}
-	srcRm := st.RandaoMixes()
-	rm := make([]string, len(srcRm))
-	for i, m := range srcRm {
-		rm[i] = hexutil.Encode(m)
-	}
-	srcSlashings := st.Slashings()
-	slashings := make([]string, len(srcSlashings))
-	for i, s := range srcSlashings {
-		slashings[i] = fmt.Sprintf("%d", s)
-	}
-	srcPrevPart, err := st.PreviousEpochParticipation()
-	if err != nil {
-		return nil, err
-	}
-	prevPart := make([]string, len(srcPrevPart))
-	for i, p := range srcPrevPart {
-		prevPart[i] = fmt.Sprintf("%d", p)
-	}
-	srcCurrPart, err := st.CurrentEpochParticipation()
-	if err != nil {
-		return nil, err
-	}
-	currPart := make([]string, len(srcCurrPart))
-	for i, p := range srcCurrPart {
-		currPart[i] = fmt.Sprintf("%d", p)
-	}
-	srcIs, err := st.InactivityScores()
-	if err != nil {
-		return nil, err
-	}
-	is := make([]string, len(srcIs))
-	for i, s := range srcIs {
-		is[i] = fmt.Sprintf("%d", s)
-	}
-	currSc, err := st.CurrentSyncCommittee()
-	if err != nil {
-		return nil, err
-	}
-	nextSc, err := st.NextSyncCommittee()
-	if err != nil {
-		return nil, err
-	}
-	srcPayload, err := st.LatestExecutionPayloadHeaderEPBS()
-	if err != nil {
-		return nil, err
-	}
-	payload, err := ExecutionPayloadHeaderEPBSFromConsensus(srcPayload)
-	if err != nil {
-		return nil, err
-	}
-	srcHs, err := st.HistoricalSummaries()
-	if err != nil {
-		return nil, err
-	}
-	hs := make([]*HistoricalSummary, len(srcHs))
-	for i, s := range srcHs {
-		hs[i] = HistoricalSummaryFromConsensus(s)
-	}
-	nwi, err := st.NextWithdrawalIndex()
-	if err != nil {
-		return nil, err
-	}
-	nwvi, err := st.NextWithdrawalValidatorIndex()
-	if err != nil {
-		return nil, err
-	}
-	drsi, err := st.DepositRequestsStartIndex()
-	if err != nil {
-		return nil, err
-	}
-	dbtc, err := st.DepositBalanceToConsume()
-	if err != nil {
-		return nil, err
-	}
-	ebtc, err := st.ExitBalanceToConsume()
-	if err != nil {
-		return nil, err
-	}
-	eee, err := st.EarliestExitEpoch()
-	if err != nil {
-		return nil, err
-	}
-	cbtc, err := st.ConsolidationBalanceToConsume()
-	if err != nil {
-		return nil, err
-	}
-	ece, err := st.EarliestConsolidationEpoch()
-	if err != nil {
-		return nil, err
-	}
-	pbd, err := st.PendingDeposits()
-	if err != nil {
-		return nil, err
-	}
-	ppw, err := st.PendingPartialWithdrawals()
-	if err != nil {
-		return nil, err
-	}
-	pc, err := st.PendingConsolidations()
-	if err != nil {
-		return nil, err
-	}
-	latestBlockHash, err := st.LatestBlockHash()
-	if err != nil {
-		return nil, err
-	}
-	latestFullSlot, err := st.LatestFullSlot()
-	if err != nil {
-		return nil, err
-	}
-	latestWithdrawalsRoot, err := st.LastWithdrawalsRoot()
-	if err != nil {
-		return nil, err
-	}
-
-	return &BeaconStateEPBS{
-		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime()),
-		GenesisValidatorsRoot:         hexutil.Encode(st.GenesisValidatorsRoot()),
-		Slot:                          fmt.Sprintf("%d", st.Slot()),
-		Fork:                          ForkFromConsensus(st.Fork()),
-		LatestBlockHeader:             BeaconBlockHeaderFromConsensus(st.LatestBlockHeader()),
-		BlockRoots:                    br,
-		StateRoots:                    sr,
-		HistoricalRoots:               hr,
-		Eth1Data:                      Eth1DataFromConsensus(st.Eth1Data()),
-		Eth1DataVotes:                 votes,
-		Eth1DepositIndex:              fmt.Sprintf("%d", st.Eth1DepositIndex()),
-		Validators:                    vals,
-		Balances:                      bals,
-		RandaoMixes:                   rm,
-		Slashings:                     slashings,
-		PreviousEpochParticipation:    prevPart,
-		CurrentEpochParticipation:     currPart,
-		JustificationBits:             hexutil.Encode(st.JustificationBits()),
-		PreviousJustifiedCheckpoint:   CheckpointFromConsensus(st.PreviousJustifiedCheckpoint()),
-		CurrentJustifiedCheckpoint:    CheckpointFromConsensus(st.CurrentJustifiedCheckpoint()),
-		FinalizedCheckpoint:           CheckpointFromConsensus(st.FinalizedCheckpoint()),
-		InactivityScores:              is,
-		CurrentSyncCommittee:          SyncCommitteeFromConsensus(currSc),
-		NextSyncCommittee:             SyncCommitteeFromConsensus(nextSc),
-		LatestExecutionPayloadHeader:  payload,
-		NextWithdrawalIndex:           fmt.Sprintf("%d", nwi),
-		NextWithdrawalValidatorIndex:  fmt.Sprintf("%d", nwvi),
-		HistoricalSummaries:           hs,
-		DepositRequestsStartIndex:     fmt.Sprintf("%d", drsi),
-		DepositBalanceToConsume:       fmt.Sprintf("%d", dbtc),
-		ExitBalanceToConsume:          fmt.Sprintf("%d", ebtc),
-		EarliestExitEpoch:             fmt.Sprintf("%d", eee),
-		ConsolidationBalanceToConsume: fmt.Sprintf("%d", cbtc),
-		EarliestConsolidationEpoch:    fmt.Sprintf("%d", ece),
-		PendingDeposits:               PendingDepositsFromConsensus(pbd),
-		PendingPartialWithdrawals:     PendingPartialWithdrawalsFromConsensus(ppw),
-		PendingConsolidations:         PendingConsolidationsFromConsensus(pc),
-		LatestBlockHash:               hexutil.Encode(latestBlockHash),
-		LatestFullSlot:                fmt.Sprintf("%d", latestFullSlot),
-		LatestWithdrawalsRoot:         hexutil.Encode(latestWithdrawalsRoot),
-	}, nil
-}
--- a/api/server/structs/converstions_block_epbs.go
+++ b/api/server/structs/converstions_block_epbs.go
@@ -1,397 +0,0 @@
-package structs
-
-import (
-	"fmt"
-	"strconv"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/prysmaticlabs/prysm/v5/api/server"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-)
-
-// ----------------------------------------------------------------------------
-// Epbs
-// ----------------------------------------------------------------------------
-
-// nolint:gocognit
-func (b *BeaconBlockEpbs) ToConsensus() (*eth.BeaconBlockEpbs, error) {
-	if b == nil {
-		return nil, errNilValue
-	}
-	if b.Body == nil {
-		return nil, server.NewDecodeError(errNilValue, "Body")
-	}
-	if b.Body.Eth1Data == nil {
-		return nil, server.NewDecodeError(errNilValue, "Body.Eth1Data")
-	}
-	if b.Body.SyncAggregate == nil {
-		return nil, server.NewDecodeError(errNilValue, "Body.SyncAggregate")
-	}
-	slot, err := strconv.ParseUint(b.Slot, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Slot")
-	}
-	proposerIndex, err := strconv.ParseUint(b.ProposerIndex, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "ProposerIndex")
-	}
-	parentRoot, err := bytesutil.DecodeHexWithLength(b.ParentRoot, fieldparams.RootLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "ParentRoot")
-	}
-	stateRoot, err := bytesutil.DecodeHexWithLength(b.StateRoot, fieldparams.RootLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "StateRoot")
-	}
-	randaoReveal, err := bytesutil.DecodeHexWithLength(b.Body.RandaoReveal, fieldparams.BLSSignatureLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.RandaoReveal")
-	}
-	depositRoot, err := bytesutil.DecodeHexWithLength(b.Body.Eth1Data.DepositRoot, fieldparams.RootLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.Eth1Data.DepositRoot")
-	}
-	depositCount, err := strconv.ParseUint(b.Body.Eth1Data.DepositCount, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.Eth1Data.DepositCount")
-	}
-	blockHash, err := bytesutil.DecodeHexWithLength(b.Body.Eth1Data.BlockHash, common.HashLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.Eth1Data.BlockHash")
-	}
-	graffiti, err := bytesutil.DecodeHexWithLength(b.Body.Graffiti, fieldparams.RootLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.Graffiti")
-	}
-	proposerSlashings, err := ProposerSlashingsToConsensus(b.Body.ProposerSlashings)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.ProposerSlashings")
-	}
-	attesterSlashings, err := AttesterSlashingsElectraToConsensus(b.Body.AttesterSlashings)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.AttesterSlashings")
-	}
-	atts, err := AttsElectraToConsensus(b.Body.Attestations)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.Attestations")
-	}
-	deposits, err := DepositsToConsensus(b.Body.Deposits)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.Deposits")
-	}
-	exits, err := SignedExitsToConsensus(b.Body.VoluntaryExits)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.VoluntaryExits")
-	}
-	syncCommitteeBits, err := bytesutil.DecodeHexWithLength(b.Body.SyncAggregate.SyncCommitteeBits, fieldparams.SyncAggregateSyncCommitteeBytesLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.SyncAggregate.SyncCommitteeBits")
-	}
-	syncCommitteeSig, err := bytesutil.DecodeHexWithLength(b.Body.SyncAggregate.SyncCommitteeSignature, fieldparams.BLSSignatureLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.SyncAggregate.SyncCommitteeSignature")
-	}
-	signedPayloadHeader, err := b.Body.SignedExecutionPayloadHeader.ToConsensus()
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.SignedExecutionPayloadHeader")
-	}
-
-	blsChanges, err := SignedBLSChangesToConsensus(b.Body.BLSToExecutionChanges)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Body.BLSToExecutionChanges")
-	}
-	payloadAttestations := make([]*eth.PayloadAttestation, len(b.Body.PayloadAttestations))
-	for i, p := range b.Body.PayloadAttestations {
-		payloadAttestations[i], err = p.ToConsensus()
-		if err != nil {
-			return nil, server.NewDecodeError(err, fmt.Sprintf("Body.PayloadAttestations[%d]", i))
-		}
-	}
-
-	return &eth.BeaconBlockEpbs{
-		Slot:          primitives.Slot(slot),
-		ProposerIndex: primitives.ValidatorIndex(proposerIndex),
-		ParentRoot:    parentRoot,
-		StateRoot:     stateRoot,
-		Body: &eth.BeaconBlockBodyEpbs{
-			RandaoReveal: randaoReveal,
-			Eth1Data: &eth.Eth1Data{
-				DepositRoot:  depositRoot,
-				DepositCount: depositCount,
-				BlockHash:    blockHash,
-			},
-			Graffiti:          graffiti,
-			ProposerSlashings: proposerSlashings,
-			AttesterSlashings: attesterSlashings,
-			Attestations:      atts,
-			Deposits:          deposits,
-			VoluntaryExits:    exits,
-			SyncAggregate: &eth.SyncAggregate{
-				SyncCommitteeBits:      syncCommitteeBits,
-				SyncCommitteeSignature: syncCommitteeSig,
-			},
-			BlsToExecutionChanges:        blsChanges,
-			SignedExecutionPayloadHeader: signedPayloadHeader,
-			PayloadAttestations:          payloadAttestations,
-		},
-	}, nil
-}
-
-func (p *PayloadAttestation) ToConsensus() (*eth.PayloadAttestation, error) {
-	if p == nil {
-		return nil, errNilValue
-	}
-	aggregationBits, err := bytesutil.DecodeHexWithLength(p.AggregationBits, fieldparams.PTCSize/8)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "AggregationBits")
-	}
-	data, err := p.Data.ToConsensus()
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Data")
-	}
-	sig, err := bytesutil.DecodeHexWithLength(p.Signature, fieldparams.BLSSignatureLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Signature")
-	}
-	return &eth.PayloadAttestation{
-		AggregationBits: aggregationBits,
-		Data:            data,
-		Signature:       sig,
-	}, nil
-}
-
-func (p *PayloadAttestationData) ToConsensus() (*eth.PayloadAttestationData, error) {
-	if p == nil {
-		return nil, errNilValue
-	}
-	beaconBlockRoot, err := bytesutil.DecodeHexWithLength(p.BeaconBlockRoot, fieldparams.RootLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "BeaconBlockRoot")
-	}
-	slot, err := strconv.ParseUint(p.Slot, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Slot")
-	}
-	payloadStatus, err := strconv.ParseUint(p.PayloadStatus, 10, 8)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "PayloadStatus")
-	}
-	return &eth.PayloadAttestationData{
-		BeaconBlockRoot: beaconBlockRoot,
-		Slot:            primitives.Slot(slot),
-		PayloadStatus:   bytesutil.Bytes1(payloadStatus),
-	}, nil
-}
-
-func (p *SignedExecutionPayloadHeader) ToConsensus() (*enginev1.SignedExecutionPayloadHeader, error) {
-	if p == nil {
-		return nil, errNilValue
-	}
-	sig, err := bytesutil.DecodeHexWithLength(p.Signature, fieldparams.BLSSignatureLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Signature")
-	}
-	header, err := p.Message.ToConsensus()
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Header")
-	}
-	return &enginev1.SignedExecutionPayloadHeader{
-		Message:   header,
-		Signature: sig,
-	}, nil
-}
-
-func (p *ExecutionPayloadHeaderEPBS) ToConsensus() (*enginev1.ExecutionPayloadHeaderEPBS, error) {
-	parentBlockHash, err := bytesutil.DecodeHexWithLength(p.ParentBlockHash, common.HashLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "ParentBlockHash")
-	}
-	parentBlockRoot, err := bytesutil.DecodeHexWithLength(p.ParentBlockRoot, common.HashLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "ParentBlockRoot")
-	}
-	blockHash, err := bytesutil.DecodeHexWithLength(p.BlockHash, common.HashLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "BlockHash")
-	}
-	gasLimit, err := strconv.ParseUint(p.GasLimit, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "GasLimit")
-	}
-	builderIndex, err := strconv.ParseUint(p.BuilderIndex, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "BuilderIndex")
-	}
-	slot, err := strconv.ParseUint(p.Slot, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Slot")
-	}
-	value, err := strconv.ParseUint(p.Value, 10, 64)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Value")
-	}
-	blobKzgCommitmentsRoot, err := bytesutil.DecodeHexWithLength(p.BlobKzgCommitmentsRoot, fieldparams.RootLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "BlobKzgCommitmentsRoot")
-	}
-	return &enginev1.ExecutionPayloadHeaderEPBS{
-		ParentBlockHash:        parentBlockHash,
-		ParentBlockRoot:        parentBlockRoot,
-		BlockHash:              blockHash,
-		GasLimit:               gasLimit,
-		BuilderIndex:           primitives.ValidatorIndex(builderIndex),
-		Slot:                   primitives.Slot(slot),
-		Value:                  value,
-		BlobKzgCommitmentsRoot: blobKzgCommitmentsRoot,
-	}, nil
-}
-
-func (b *SignedBeaconBlockEpbs) ToConsensus() (*eth.SignedBeaconBlockEpbs, error) {
-	if b == nil {
-		return nil, errNilValue
-	}
-
-	sig, err := bytesutil.DecodeHexWithLength(b.Signature, fieldparams.BLSSignatureLength)
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Signature")
-	}
-	block, err := b.Message.ToConsensus()
-	if err != nil {
-		return nil, server.NewDecodeError(err, "Message")
-	}
-	return &eth.SignedBeaconBlockEpbs{
-		Block:     block,
-		Signature: sig,
-	}, nil
-}
-
-func BeaconBlockEpbsFromConsensus(b *eth.BeaconBlockEpbs) (*BeaconBlockEpbs, error) {
-	signedPayloadHeader, err := SignedExecutionPayloadHeaderFromConsensus(b.Body.SignedExecutionPayloadHeader)
-	if err != nil {
-		return nil, err
-	}
-	payloadAttestations, err := PayloadAttestationsFromConsensus(b.Body.PayloadAttestations)
-	if err != nil {
-		return nil, err
-	}
-	return &BeaconBlockEpbs{
-		Slot:          fmt.Sprintf("%d", b.Slot),
-		ProposerIndex: fmt.Sprintf("%d", b.ProposerIndex),
-		ParentRoot:    hexutil.Encode(b.ParentRoot),
-		StateRoot:     hexutil.Encode(b.StateRoot),
-		Body: &BeaconBlockBodyEpbs{
-			RandaoReveal:      hexutil.Encode(b.Body.RandaoReveal),
-			Eth1Data:          Eth1DataFromConsensus(b.Body.Eth1Data),
-			Graffiti:          hexutil.Encode(b.Body.Graffiti),
-			ProposerSlashings: ProposerSlashingsFromConsensus(b.Body.ProposerSlashings),
-			AttesterSlashings: AttesterSlashingsElectraFromConsensus(b.Body.AttesterSlashings),
-			Attestations:      AttsElectraFromConsensus(b.Body.Attestations),
-			Deposits:          DepositsFromConsensus(b.Body.Deposits),
-			VoluntaryExits:    SignedExitsFromConsensus(b.Body.VoluntaryExits),
-			SyncAggregate: &SyncAggregate{
-				SyncCommitteeBits:      hexutil.Encode(b.Body.SyncAggregate.SyncCommitteeBits),
-				SyncCommitteeSignature: hexutil.Encode(b.Body.SyncAggregate.SyncCommitteeSignature),
-			},
-			BLSToExecutionChanges:        SignedBLSChangesFromConsensus(b.Body.BlsToExecutionChanges),
-			SignedExecutionPayloadHeader: signedPayloadHeader,
-			PayloadAttestations:          payloadAttestations,
-		},
-	}, nil
-}
-
-func SignedExecutionPayloadEnvelopeFromConsensus(b *enginev1.SignedExecutionPayloadEnvelope) (*SignedExecutionPayloadEnvelope, error) {
-	payload, err := ExecutionPayloadEnvelopeFromConsensus(b.Message)
-	if err != nil {
-		return nil, err
-	}
-	return &SignedExecutionPayloadEnvelope{
-		Message:   payload,
-		Signature: hexutil.Encode(b.Signature),
-	}, nil
-}
-
-func ExecutionPayloadEnvelopeFromConsensus(b *enginev1.ExecutionPayloadEnvelope) (*ExecutionPayloadEnvelope, error) {
-	payload, err := ExecutionPayloadDenebFromConsensus(b.Payload)
-	if err != nil {
-		return nil, err
-	}
-	committments := make([]string, len(b.BlobKzgCommitments))
-	for i, c := range b.BlobKzgCommitments {
-		committments[i] = hexutil.Encode(c)
-	}
-
-	executionRequests := ExecutionRequestsFromConsensus(b.ExecutionRequests)
-	return &ExecutionPayloadEnvelope{
-		Payload:            payload,
-		ExecutionRequests:  executionRequests,
-		BuilderIndex:       fmt.Sprintf("%d", b.BuilderIndex),
-		BeaconBlockRoot:    hexutil.Encode(b.BeaconBlockRoot),
-		Slot:               fmt.Sprintf("%d", b.Slot),
-		BlobKzgCommitments: committments,
-		StateRoot:          hexutil.Encode(b.BeaconStateRoot),
-	}, nil
-}
-
-func SignedBeaconBlockEpbsFromConsensus(b *eth.SignedBeaconBlockEpbs) (*SignedBeaconBlockEpbs, error) {
-	block, err := BeaconBlockEpbsFromConsensus(b.Block)
-	if err != nil {
-		return nil, err
-	}
-	return &SignedBeaconBlockEpbs{
-		Message:   block,
-		Signature: hexutil.Encode(b.Signature),
-	}, nil
-}
-
-func SignedExecutionPayloadHeaderFromConsensus(b *enginev1.SignedExecutionPayloadHeader) (*SignedExecutionPayloadHeader, error) {
-	header, err := ExecutionPayloadHeaderEPBSFromConsensus(b.Message)
-	if err != nil {
-		return nil, err
-	}
-	return &SignedExecutionPayloadHeader{
-		Message:   header,
-		Signature: hexutil.Encode(b.Signature),
-	}, nil
-}
-
-func ExecutionPayloadHeaderEPBSFromConsensus(b *enginev1.ExecutionPayloadHeaderEPBS) (*ExecutionPayloadHeaderEPBS, error) {
-	return &ExecutionPayloadHeaderEPBS{
-		ParentBlockHash:        hexutil.Encode(b.ParentBlockHash),
-		ParentBlockRoot:        hexutil.Encode(b.ParentBlockRoot),
-		BlockHash:              hexutil.Encode(b.BlockHash),
-		GasLimit:               fmt.Sprintf("%d", b.GasLimit),
-		BuilderIndex:           fmt.Sprintf("%d", b.BuilderIndex),
-		Slot:                   fmt.Sprintf("%d", b.Slot),
-		Value:                  fmt.Sprintf("%d", b.Value),
-		BlobKzgCommitmentsRoot: hexutil.Encode(b.BlobKzgCommitmentsRoot),
-	}, nil
-}
-
-func PayloadAttestationsFromConsensus(b []*eth.PayloadAttestation) ([]*PayloadAttestation, error) {
-	payloadAttestations := make([]*PayloadAttestation, len(b))
-	for i, p := range b {
-		data, err := PayloadAttestationDataFromConsensus(p.Data)
-		if err != nil {
-			return nil, err
-		}
-		payloadAttestations[i] = &PayloadAttestation{
-			AggregationBits: hexutil.Encode(p.AggregationBits),
-			Data:            data,
-			Signature:       hexutil.Encode(p.Signature),
-		}
-	}
-	return payloadAttestations, nil
-}
-
-func PayloadAttestationDataFromConsensus(b *eth.PayloadAttestationData) (*PayloadAttestationData, error) {
-	return &PayloadAttestationData{
-		BeaconBlockRoot: hexutil.Encode(b.BeaconBlockRoot),
-		Slot:            fmt.Sprintf("%d", b.Slot),
-		PayloadStatus:   fmt.Sprintf("%d", b.PayloadStatus),
-	}, nil
-}
--- a/api/server/structs/endpoints_events.go
+++ b/api/server/structs/endpoints_events.go
@@ -20,13 +20,6 @@ type BlockEvent struct {
 	ExecutionOptimistic bool   `json:"execution_optimistic"`
 }

-type PayloadEvent struct {
-	Slot                string `json:"slot"`
-	BlockRoot           string `json:"block_root"`
-	ExecutionBlockHash  string `json:"execution_block_hash"`
-	ExecutionOptimistic bool   `json:"execution_optimistic"`
-}
-
 type AggregatedAttEventSource struct {
 	Aggregate *Attestation `json:"aggregate"`
 }
--- a/api/server/structs/state_epbs.go
+++ b/api/server/structs/state_epbs.go
@@ -1,44 +0,0 @@
-package structs
-
-type BeaconStateEPBS struct {
-	GenesisTime                   string                      `json:"genesis_time"`
-	GenesisValidatorsRoot         string                      `json:"genesis_validators_root"`
-	Slot                          string                      `json:"slot"`
-	Fork                          *Fork                       `json:"fork"`
-	LatestBlockHeader             *BeaconBlockHeader          `json:"latest_block_header"`
-	BlockRoots                    []string                    `json:"block_roots"`
-	StateRoots                    []string                    `json:"state_roots"`
-	HistoricalRoots               []string                    `json:"historical_roots"`
-	Eth1Data                      *Eth1Data                   `json:"eth1_data"`
-	Eth1DataVotes                 []*Eth1Data                 `json:"eth1_data_votes"`
-	Eth1DepositIndex              string                      `json:"eth1_deposit_index"`
-	Validators                    []*Validator                `json:"validators"`
-	Balances                      []string                    `json:"balances"`
-	RandaoMixes                   []string                    `json:"randao_mixes"`
-	Slashings                     []string                    `json:"slashings"`
-	PreviousEpochParticipation    []string                    `json:"previous_epoch_participation"`
-	CurrentEpochParticipation     []string                    `json:"current_epoch_participation"`
-	JustificationBits             string                      `json:"justification_bits"`
-	PreviousJustifiedCheckpoint   *Checkpoint                 `json:"previous_justified_checkpoint"`
-	CurrentJustifiedCheckpoint    *Checkpoint                 `json:"current_justified_checkpoint"`
-	FinalizedCheckpoint           *Checkpoint                 `json:"finalized_checkpoint"`
-	InactivityScores              []string                    `json:"inactivity_scores"`
-	CurrentSyncCommittee          *SyncCommittee              `json:"current_sync_committee"`
-	NextSyncCommittee             *SyncCommittee              `json:"next_sync_committee"`
-	LatestExecutionPayloadHeader  *ExecutionPayloadHeaderEPBS `json:"latest_execution_payload_header"`
-	NextWithdrawalIndex           string                      `json:"next_withdrawal_index"`
-	NextWithdrawalValidatorIndex  string                      `json:"next_withdrawal_validator_index"`
-	HistoricalSummaries           []*HistoricalSummary        `json:"historical_summaries"`
-	DepositRequestsStartIndex     string                      `json:"deposit_requests_start_index"`
-	DepositBalanceToConsume       string                      `json:"deposit_balance_to_consume"`
-	ExitBalanceToConsume          string                      `json:"exit_balance_to_consume"`
-	EarliestExitEpoch             string                      `json:"earliest_exit_epoch"`
-	ConsolidationBalanceToConsume string                      `json:"consolidation_balance_to_consume"`
-	EarliestConsolidationEpoch    string                      `json:"earliest_consolidation_epoch"`
-	PendingDeposits               []*PendingDeposit           `json:"pending_deposits"`
-	PendingPartialWithdrawals     []*PendingPartialWithdrawal `json:"pending_partial_withdrawals"`
-	PendingConsolidations         []*PendingConsolidation     `json:"pending_consolidations"`
-	LatestBlockHash               string                      `json:"latest_block_hash"`
-	LatestFullSlot                string                      `json:"latest_full_slot"`
-	LatestWithdrawalsRoot         string                      `json:"latest_withdrawals_root"`
-}
--- a/beacon-chain/blockchain/BUILD.bazel
+++ b/beacon-chain/blockchain/BUILD.bazel
@@ -6,11 +6,9 @@ go_library(
        "chain_info.go",
        "chain_info_forkchoice.go",
        "currently_syncing_block.go",
-        "currently_syncing_execution_payload_envelope.go",
        "defragment.go",
        "error.go",
        "execution_engine.go",
-        "execution_engine_epbs.go",
        "forkchoice_update_execution.go",
        "head.go",
        "head_sync_committee_info.go",
@@ -27,8 +25,6 @@ go_library(
        "receive_attestation.go",
        "receive_blob.go",
        "receive_block.go",
-        "receive_execution_payload_envelope.go",
-        "receive_payload_attestation_message.go",
        "service.go",
        "tracked_proposer.go",
        "weak_subjectivity_checks.go",
@@ -47,7 +43,6 @@ go_library(
        "//beacon-chain/cache:go_default_library",
        "//beacon-chain/core/altair:go_default_library",
        "//beacon-chain/core/blocks:go_default_library",
-        "//beacon-chain/core/epbs:go_default_library",
        "//beacon-chain/core/epoch/precompute:go_default_library",
        "//beacon-chain/core/feed:go_default_library",
        "//beacon-chain/core/feed/state:go_default_library",
@@ -73,6 +68,7 @@ go_library(
        "//beacon-chain/startup:go_default_library",
        "//beacon-chain/state:go_default_library",
        "//beacon-chain/state/stategen:go_default_library",
+        "//beacon-chain/sync/rlnc:go_default_library",
        "//config/features:go_default_library",
        "//config/fieldparams:go_default_library",
        "//config/params:go_default_library",
@@ -101,7 +97,6 @@ go_library(
        "@com_github_prometheus_client_golang//prometheus:go_default_library",
        "@com_github_prometheus_client_golang//prometheus/promauto:go_default_library",
        "@com_github_sirupsen_logrus//:go_default_library",
-        "@io_opencensus_go//trace:go_default_library",
        "@org_golang_x_sync//errgroup:go_default_library",
    ],
 )
@@ -114,7 +109,6 @@ go_test(
        "chain_info_norace_test.go",
        "chain_info_test.go",
        "checktags_test.go",
-        "epbs_test.go",
        "error_test.go",
        "execution_engine_test.go",
        "forkchoice_update_execution_test.go",
@@ -130,7 +124,6 @@ go_test(
        "process_block_test.go",
        "receive_attestation_test.go",
        "receive_block_test.go",
-        "receive_execution_payload_envelope_test.go",
        "service_norace_test.go",
        "service_test.go",
        "setup_test.go",
@@ -185,7 +178,6 @@ go_test(
        "//testing/assert:go_default_library",
        "//testing/require:go_default_library",
        "//testing/util:go_default_library",
-        "//testing/util/random:go_default_library",
        "//time:go_default_library",
        "//time/slots:go_default_library",
        "@com_github_ethereum_go_ethereum//common:go_default_library",
--- a/beacon-chain/blockchain/chain_info.go
+++ b/beacon-chain/blockchain/chain_info.go
@@ -43,7 +43,7 @@ type ForkchoiceFetcher interface {
 	GetProposerHead() [32]byte
 	SetForkChoiceGenesisTime(uint64)
 	UpdateHead(context.Context, primitives.Slot)
-	HighestReceivedBlockSlotRoot() (primitives.Slot, [32]byte)
+	HighestReceivedBlockSlot() primitives.Slot
 	ReceivedBlocksLastEpoch() (uint64, error)
 	InsertNode(context.Context, state.BeaconState, consensus_blocks.ROBlock) error
 	ForkChoiceDump(context.Context) (*forkchoice.Dump, error)
@@ -51,8 +51,6 @@ type ForkchoiceFetcher interface {
 	ProposerBoost() [32]byte
 	RecentBlockSlot(root [32]byte) (primitives.Slot, error)
 	IsCanonical(ctx context.Context, blockRoot [32]byte) (bool, error)
-	GetPTCVote(root [32]byte) primitives.PTCStatus
-	HashForBlockRoot(context.Context, [32]byte) ([]byte, error)
 }

 // TimeFetcher retrieves the Ethereum consensus data that's related to time.
@@ -121,12 +119,6 @@ type OptimisticModeFetcher interface {
 	IsOptimisticForRoot(ctx context.Context, root [32]byte) (bool, error)
 }

-// ExecutionPayloadFetcher defines a common interface that returns forkchoice
-// information about payload block hashes
-type ExecutionPayloadFetcher interface {
-	HashInForkchoice([32]byte) bool
-}
-
 // FinalizedCheckpt returns the latest finalized checkpoint from chain store.
 func (s *Service) FinalizedCheckpt() *ethpb.Checkpoint {
 	s.cfg.ForkChoiceStore.RLock()
@@ -408,14 +400,6 @@ func (s *Service) InForkchoice(root [32]byte) bool {
 	return s.cfg.ForkChoiceStore.HasNode(root)
 }

-// HashInForkchoice returns true if the given payload block hash is found in
-// forkchoice
-func (s *Service) HashInForkchoice(hash [32]byte) bool {
-	s.cfg.ForkChoiceStore.RLock()
-	defer s.cfg.ForkChoiceStore.RUnlock()
-	return s.cfg.ForkChoiceStore.HasHash(hash)
-}
-
 // IsOptimisticForRoot takes the root as argument instead of the current head
 // and returns true if it is optimistic.
 func (s *Service) IsOptimisticForRoot(ctx context.Context, root [32]byte) (bool, error) {
@@ -552,12 +536,6 @@ func (s *Service) BlockBeingSynced(root [32]byte) bool {
 	return s.blockBeingSynced.isSyncing(root)
 }

-// PayloadBeingSynced returns whether the block with the given root is currently being synced
-func (s *Service) PayloadBeingSynced(root [32]byte) bool {
-	_, syncing := s.payloadBeingSynced.isSyncing(root)
-	return syncing
-}
-
 // RecentBlockSlot returns block slot form fork choice store
 func (s *Service) RecentBlockSlot(root [32]byte) (primitives.Slot, error) {
 	s.cfg.ForkChoiceStore.RLock()
--- a/beacon-chain/blockchain/chain_info_forkchoice.go
+++ b/beacon-chain/blockchain/chain_info_forkchoice.go
@@ -7,8 +7,8 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	consensus_blocks "github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/forkchoice"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )

@@ -33,11 +33,11 @@ func (s *Service) SetForkChoiceGenesisTime(timestamp uint64) {
 	s.cfg.ForkChoiceStore.SetGenesisTime(timestamp)
 }

-// HighestReceivedBlockSlotRoot returns the corresponding value from forkchoice
-func (s *Service) HighestReceivedBlockSlotRoot() (primitives.Slot, [32]byte) {
+// HighestReceivedBlockSlot returns the corresponding value from forkchoice
+func (s *Service) HighestReceivedBlockSlot() primitives.Slot {
 	s.cfg.ForkChoiceStore.RLock()
 	defer s.cfg.ForkChoiceStore.RUnlock()
-	return s.cfg.ForkChoiceStore.HighestReceivedBlockSlotRoot()
+	return s.cfg.ForkChoiceStore.HighestReceivedBlockSlot()
 }

 // ReceivedBlocksLastEpoch returns the corresponding value from forkchoice
@@ -104,56 +104,25 @@ func (s *Service) ParentRoot(root [32]byte) ([32]byte, error) {
 	return s.cfg.ForkChoiceStore.ParentRoot(root)
 }

-// HashForBlockRoot wraps a call to the corresponding method in forkchoice. If the hash is older it will grab it from DB
-func (s *Service) HashForBlockRoot(ctx context.Context, root [32]byte) ([]byte, error) {
-	s.cfg.ForkChoiceStore.RLock()
-	defer s.cfg.ForkChoiceStore.RUnlock()
-	hash := s.cfg.ForkChoiceStore.HashForBlockRoot(root)
-	if hash != [32]byte{} {
-		return hash[:], nil
-	}
-	blk, err := s.cfg.BeaconDB.Block(ctx, root)
+// hashForGenesisBlock returns the right hash for the genesis block
+func (s *Service) hashForGenesisBlock(ctx context.Context, root [32]byte) ([]byte, error) {
+	genRoot, err := s.cfg.BeaconDB.GenesisBlockRoot(ctx)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to get block from DB and forkchoice")
+		return nil, errors.Wrap(err, "could not get genesis block root")
 	}
-	if blk.Version() < version.EPBS {
-		return nil, errors.New("block version is too old")
+	if root != genRoot {
+		return nil, errNotGenesisRoot
 	}
-	sh, err := blk.Block().Body().SignedExecutionPayloadHeader()
+	st, err := s.cfg.BeaconDB.GenesisState(ctx)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to get signed execution payload header")
+		return nil, errors.Wrap(err, "could not get genesis state")
 	}
-	h, err := sh.Header()
+	if st.Version() < version.Bellatrix {
+		return nil, nil
+	}
+	header, err := st.LatestExecutionPayloadHeader()
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to get execution payload header")
+		return nil, errors.Wrap(err, "could not get latest execution payload header")
 	}
-	hash = h.BlockHash()
-	return hash[:], nil
-}
-
-// GetPTCVote wraps a call to the corresponding method in forkchoice and checks
-// the currently syncing status
-// Warning: this method will return the current PTC status regardless of
-// timeliness. A client MUST call this method when about to submit a PTC
-// attestation, that is exactly at the threshold to submit the attestation.
-func (s *Service) GetPTCVote(root [32]byte) primitives.PTCStatus {
-	s.cfg.ForkChoiceStore.RLock()
-	f := s.cfg.ForkChoiceStore.GetPTCVote()
-	s.cfg.ForkChoiceStore.RUnlock()
-	if f != primitives.PAYLOAD_ABSENT {
-		return f
-	}
-	f, isSyncing := s.payloadBeingSynced.isSyncing(root)
-	if isSyncing {
-		return f
-	}
-	return primitives.PAYLOAD_ABSENT
-}
-
-// insertPayloadEnvelope wraps a locked call to the corresponding method in
-// forkchoice
-func (s *Service) insertPayloadEnvelope(envelope interfaces.ROExecutionPayloadEnvelope) error {
-	s.cfg.ForkChoiceStore.Lock()
-	defer s.cfg.ForkChoiceStore.Unlock()
-	return s.cfg.ForkChoiceStore.InsertPayloadEnvelope(envelope)
+	return bytesutil.SafeCopyBytes(header.BlockHash()), nil
 }
--- a/beacon-chain/blockchain/chain_info_test.go
+++ b/beacon-chain/blockchain/chain_info_test.go
@@ -36,7 +36,6 @@ func prepareForkchoiceState(
 	blockRoot [32]byte,
 	parentRoot [32]byte,
 	payloadHash [32]byte,
-	parentHash [32]byte,
 	justified *ethpb.Checkpoint,
 	finalized *ethpb.Checkpoint,
 ) (state.BeaconState, blocks.ROBlock, error) {
@@ -69,8 +68,7 @@ func prepareForkchoiceState(
 			ParentRoot: parentRoot[:],
 			Body: &ethpb.BeaconBlockBodyBellatrix{
 				ExecutionPayload: &enginev1.ExecutionPayload{
-					BlockHash:  payloadHash[:],
-					ParentHash: parentHash[:],
+					BlockHash: payloadHash[:],
 				},
 			},
 		},
@@ -143,7 +141,7 @@ func TestUnrealizedJustifiedBlockHash(t *testing.T) {
 	service := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}}
 	ojc := &ethpb.Checkpoint{Root: []byte{'j'}}
 	ofc := &ethpb.Checkpoint{Root: []byte{'f'}}
-	st, roblock, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	st, roblock, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
 	service.cfg.ForkChoiceStore.SetBalancesByRooter(func(_ context.Context, _ [32]byte) ([]uint64, error) { return []uint64{}, nil })
@@ -337,22 +335,22 @@ func TestService_ChainHeads(t *testing.T) {
 	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}}
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	st, roblock, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	st, roblock, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'B'}, [32]byte{'A'}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, [32]byte{'C'}, [32]byte{'B'}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 102, [32]byte{'c'}, [32]byte{'b'}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 103, [32]byte{'d'}, [32]byte{'a'}, [32]byte{'D'}, [32]byte{'C'}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 103, [32]byte{'d'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 104, [32]byte{'e'}, [32]byte{'b'}, [32]byte{'E'}, [32]byte{'D'}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 104, [32]byte{'e'}, [32]byte{'b'}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))

@@ -434,10 +432,10 @@ func TestService_IsOptimistic(t *testing.T) {
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, head: &head{root: [32]byte{'b'}}}
-	st, roblock, err := prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	st, roblock, err := prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))

@@ -470,10 +468,10 @@ func TestService_IsOptimisticForRoot(t *testing.T) {
 	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, head: &head{root: [32]byte{'b'}}}
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	st, roblock, err := prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	st, roblock, err := prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
-	st, roblock, err = prepareForkchoiceState(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, [32]byte{'A'}, ojc, ofc)
+	st, roblock, err = prepareForkchoiceState(ctx, 101, [32]byte{'b'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))

@@ -614,3 +612,20 @@ func TestService_IsFinalized(t *testing.T) {
 	require.Equal(t, true, c.IsFinalized(ctx, br))
 	require.Equal(t, false, c.IsFinalized(ctx, [32]byte{'c'}))
 }
+
+func Test_hashForGenesisRoot(t *testing.T) {
+	beaconDB := testDB.SetupDB(t)
+	ctx := context.Background()
+	c := setupBeaconChain(t, beaconDB)
+	st, _ := util.DeterministicGenesisStateElectra(t, 10)
+	require.NoError(t, c.cfg.BeaconDB.SaveGenesisData(ctx, st))
+	root, err := beaconDB.GenesisBlockRoot(ctx)
+	require.NoError(t, err)
+	genRoot, err := c.hashForGenesisBlock(ctx, [32]byte{'a'})
+	require.ErrorIs(t, err, errNotGenesisRoot)
+	require.IsNil(t, genRoot)
+
+	genRoot, err = c.hashForGenesisBlock(ctx, root)
+	require.NoError(t, err)
+	require.Equal(t, [32]byte{}, [32]byte(genRoot))
+}
--- a/beacon-chain/blockchain/currently_syncing_execution_payload_envelope.go
+++ b/beacon-chain/blockchain/currently_syncing_execution_payload_envelope.go
@@ -1,32 +0,0 @@
-package blockchain
-
-import (
-	"sync"
-
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-)
-
-type currentlySyncingPayload struct {
-	sync.Mutex
-	roots map[[32]byte]primitives.PTCStatus
-}
-
-func (b *currentlySyncingPayload) set(envelope interfaces.ROExecutionPayloadEnvelope) {
-	b.Lock()
-	defer b.Unlock()
-	b.roots[envelope.BeaconBlockRoot()] = primitives.PAYLOAD_PRESENT
-}
-
-func (b *currentlySyncingPayload) unset(root [32]byte) {
-	b.Lock()
-	defer b.Unlock()
-	delete(b.roots, root)
-}
-
-func (b *currentlySyncingPayload) isSyncing(root [32]byte) (status primitives.PTCStatus, isSyncing bool) {
-	b.Lock()
-	defer b.Unlock()
-	status, isSyncing = b.roots[root]
-	return
-}
--- a/beacon-chain/blockchain/epbs_test.go
+++ b/beacon-chain/blockchain/epbs_test.go
@@ -1,18 +0,0 @@
-package blockchain
-
-import (
-	"testing"
-
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-)
-
-func TestServiceGetPTCVote(t *testing.T) {
-	c := &currentlySyncingPayload{roots: make(map[[32]byte]primitives.PTCStatus)}
-	s := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, payloadBeingSynced: c}
-	r := [32]byte{'r'}
-	require.Equal(t, primitives.PAYLOAD_ABSENT, s.GetPTCVote(r))
-	c.roots[r] = primitives.PAYLOAD_WITHHELD
-	require.Equal(t, primitives.PAYLOAD_WITHHELD, s.GetPTCVote(r))
-}
--- a/beacon-chain/blockchain/error.go
+++ b/beacon-chain/blockchain/error.go
@@ -30,9 +30,8 @@ var (
 	ErrNotCheckpoint = errors.New("not a checkpoint in forkchoice")
 	// ErrNilHead is returned when no head is present in the blockchain service.
 	ErrNilHead = errors.New("nil head")
-	// errInvalidValidatorIndex is returned when a validator index is
-	// invalid or unexpected
-	errInvalidValidatorIndex = errors.New("invalid validator index")
+	// errNotGenesisRoot is returned when the root is not the genesis block root.
+	errNotGenesisRoot = errors.New("root is not the genesis block root")
 )

 var errMaxBlobsExceeded = errors.New("Expected commitments in block exceeds MAX_BLOBS_PER_BLOCK")
--- a/beacon-chain/blockchain/execution_engine.go
+++ b/beacon-chain/blockchain/execution_engine.go
@@ -2,7 +2,6 @@ package blockchain

 import (
 	"context"
-	"crypto/sha256"
 	"fmt"

 	"github.com/ethereum/go-ethereum/common"
@@ -31,8 +30,6 @@ import (
 	"github.com/sirupsen/logrus"
 )

-const blobCommitmentVersionKZG uint8 = 0x01
-
 var defaultLatestValidHash = bytesutil.PadTo([]byte{0xff}, 32)

 // notifyForkchoiceUpdate signals execution engine the fork choice updates. Execution engine should:
@@ -72,6 +69,18 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *fcuConfig) (*
 		SafeBlockHash:      justifiedHash[:],
 		FinalizedBlockHash: finalizedHash[:],
 	}
+	if len(fcs.HeadBlockHash) != 32 || [32]byte(fcs.HeadBlockHash) == [32]byte{} {
+		// check if we are sending FCU at genesis
+		hash, err := s.hashForGenesisBlock(ctx, arg.headRoot)
+		if errors.Is(err, errNotGenesisRoot) {
+			log.Error("Sending nil head block hash to execution engine")
+			return nil, nil
+		}
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get head block hash")
+		}
+		fcs.HeadBlockHash = hash
+	}
 	if arg.attributes == nil {
 		arg.attributes = payloadattribute.EmptyWithVersion(headBlk.Version())
 	}
@@ -98,14 +107,6 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *fcuConfig) (*
 				log.WithError(err).Error("Could not set head root to invalid")
 				return nil, nil
 			}
-			if len(invalidRoots) == 0 {
-				log.WithFields(logrus.Fields{
-					"slot":      headBlk.Slot(),
-					"blockRoot": fmt.Sprintf("%#x", bytesutil.Trunc(headRoot[:])),
-				}).Warn("invalid payload")
-				return nil, nil
-			}
-
 			if err := s.removeInvalidBlockAndState(ctx, invalidRoots); err != nil {
 				log.WithError(err).Error("Could not remove invalid block and state")
 				return nil, nil
@@ -120,7 +121,6 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *fcuConfig) (*
 				}).Warn("Pruned invalid blocks, could not update head root")
 				return nil, invalidBlock{error: ErrInvalidPayload, root: arg.headRoot, invalidAncestorRoots: invalidRoots}
 			}
-
 			b, err := s.getBlock(ctx, r)
 			if err != nil {
 				log.WithError(err).Error("Could not get head block")
@@ -468,13 +468,7 @@ func kzgCommitmentsToVersionedHashes(body interfaces.ReadOnlyBeaconBlockBody) ([

 	versionedHashes := make([]common.Hash, len(commitments))
 	for i, commitment := range commitments {
-		versionedHashes[i] = ConvertKzgCommitmentToVersionedHash(commitment)
+		versionedHashes[i] = primitives.ConvertKzgCommitmentToVersionedHash(commitment)
 	}
 	return versionedHashes, nil
 }
-
-func ConvertKzgCommitmentToVersionedHash(commitment []byte) common.Hash {
-	versionedHash := sha256.Sum256(commitment)
-	versionedHash[0] = blobCommitmentVersionKZG
-	return versionedHash
-}
--- a/beacon-chain/blockchain/execution_engine_epbs.go
+++ b/beacon-chain/blockchain/execution_engine_epbs.go
@@ -1,62 +0,0 @@
-package blockchain
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/execution"
-	"github.com/prysmaticlabs/prysm/v5/config/features"
-	payloadattribute "github.com/prysmaticlabs/prysm/v5/consensus-types/payload-attribute"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
-	"github.com/sirupsen/logrus"
-)
-
-// notifyForkchoiceUpdate signals execution engine the fork choice updates. Execution engine should:
-// 1. Re-organizes the execution payload chain and corresponding state to make head_block_hash the head.
-// 2. Applies finality to the execution state: it irreversibly persists the chain of all execution payloads and corresponding state, up to and including finalized_block_hash.
-func (s *Service) notifyForkchoiceUpdateEPBS(ctx context.Context, blockhash [32]byte, attributes payloadattribute.Attributer) (*enginev1.PayloadIDBytes, error) {
-	ctx, span := trace.StartSpan(ctx, "blockChain.notifyForkchoiceUpdateEPBS")
-	defer span.End()
-
-	finalizedHash := s.cfg.ForkChoiceStore.FinalizedPayloadBlockHash()
-	justifiedHash := s.cfg.ForkChoiceStore.UnrealizedJustifiedPayloadBlockHash()
-	fcs := &enginev1.ForkchoiceState{
-		HeadBlockHash:      blockhash[:],
-		SafeBlockHash:      justifiedHash[:],
-		FinalizedBlockHash: finalizedHash[:],
-	}
-	if attributes == nil {
-		attributes = payloadattribute.EmptyWithVersion(version.EPBS)
-	}
-	payloadID, lastValidHash, err := s.cfg.ExecutionEngineCaller.ForkchoiceUpdated(ctx, fcs, attributes)
-	if err != nil {
-		switch {
-		case errors.Is(err, execution.ErrAcceptedSyncingPayloadStatus):
-			forkchoiceUpdatedOptimisticNodeCount.Inc()
-			log.WithFields(logrus.Fields{
-				"headPayloadBlockHash":      fmt.Sprintf("%#x", bytesutil.Trunc(blockhash[:])),
-				"finalizedPayloadBlockHash": fmt.Sprintf("%#x", bytesutil.Trunc(finalizedHash[:])),
-			}).Info("Called fork choice updated with optimistic block")
-			return payloadID, nil
-		case errors.Is(err, execution.ErrInvalidPayloadStatus):
-			log.WithError(err).Info("forkchoice updated to invalid block")
-			return nil, invalidBlock{error: ErrInvalidPayload, root: [32]byte(lastValidHash)}
-		default:
-			log.WithError(err).Error(ErrUndefinedExecutionEngineError)
-			return nil, nil
-		}
-	}
-	forkchoiceUpdatedValidNodeCount.Inc()
-	// If the forkchoice update call has an attribute, update the payload ID cache.
-	hasAttr := attributes != nil && !attributes.IsEmpty()
-	if hasAttr && payloadID == nil && !features.Get().PrepareAllPayloads {
-		log.WithFields(logrus.Fields{
-			"blockHash": fmt.Sprintf("%#x", blockhash[:]),
-		}).Error("Received nil payload ID on VALID engine response")
-	}
-	return payloadID, nil
-}
--- a/beacon-chain/blockchain/execution_engine_test.go
+++ b/beacon-chain/blockchain/execution_engine_test.go
@@ -46,13 +46,13 @@ func Test_NotifyForkchoiceUpdate_GetPayloadAttrErrorCanContinue(t *testing.T) {

 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 1, altairBlkRoot, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 1, altairBlkRoot, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 2, bellatrixBlkRoot, altairBlkRoot, [32]byte{'B'}, [32]byte{'A'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 2, bellatrixBlkRoot, altairBlkRoot, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))

@@ -84,7 +84,7 @@ func Test_NotifyForkchoiceUpdate_GetPayloadAttrErrorCanContinue(t *testing.T) {
 	service.cfg.PayloadIDCache.Set(1, [32]byte{}, [8]byte{})
 	got, err := service.notifyForkchoiceUpdate(ctx, arg)
 	require.NoError(t, err)
-	require.DeepEqual(t, got, pid) // We still get a payload ID even though the state is bad. This means it returns until the end.
+	require.IsNil(t, got)
 }

 func Test_NotifyForkchoiceUpdate(t *testing.T) {
@@ -104,15 +104,16 @@ func Test_NotifyForkchoiceUpdate(t *testing.T) {

 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 1, altairBlkRoot, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 1, altairBlkRoot, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 2, bellatrixBlkRoot, altairBlkRoot, [32]byte{'B'}, [32]byte{'A'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 2, bellatrixBlkRoot, altairBlkRoot, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
+	badHash := [32]byte{'h'}

 	tests := []struct {
 		name             string
@@ -210,7 +211,7 @@ func Test_NotifyForkchoiceUpdate(t *testing.T) {
 			blk: func() interfaces.ReadOnlySignedBeaconBlock {
 				b, err := consensusblocks.NewSignedBeaconBlock(&ethpb.SignedBeaconBlockBellatrix{Block: &ethpb.BeaconBlockBellatrix{
 					Body: &ethpb.BeaconBlockBodyBellatrix{
-						ExecutionPayload: &v1.ExecutionPayload{},
+						ExecutionPayload: &v1.ExecutionPayload{BlockHash: badHash[:]},
 					},
 				}})
 				require.NoError(t, err)
@@ -287,16 +288,16 @@ func Test_NotifyForkchoiceUpdate_NIlLVH(t *testing.T) {
 	require.NoError(t, fcs.UpdateJustifiedCheckpoint(ctx, &forkchoicetypes.Checkpoint{}))
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 1, bra, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 1, bra, [32]byte{}, [32]byte{'A'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 2, brb, bra, [32]byte{'B'}, [32]byte{'A'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 2, brb, bra, [32]byte{'B'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 3, brc, brb, [32]byte{'C'}, [32]byte{'B'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 3, brc, brb, [32]byte{'C'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 4, brd, brc, [32]byte{'D'}, [32]byte{'C'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 4, brd, brc, [32]byte{'D'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))

@@ -316,8 +317,10 @@ func Test_NotifyForkchoiceUpdate_NIlLVH(t *testing.T) {
 		headRoot:  brd,
 	}
 	_, err = service.notifyForkchoiceUpdate(ctx, a)
-	// The incoming block is not invalid because the empty node is still valid on ePBS.
-	require.Equal(t, false, IsInvalidBlock(err))
+	require.Equal(t, true, IsInvalidBlock(err))
+	require.Equal(t, brd, InvalidBlockRoot(err))
+	require.Equal(t, brd, InvalidAncestorRoots(err)[0])
+	require.Equal(t, 1, len(InvalidAncestorRoots(err)))
 }

 //
@@ -396,28 +399,28 @@ func Test_NotifyForkchoiceUpdateRecursive_DoublyLinkedTree(t *testing.T) {
 	require.NoError(t, fcs.UpdateJustifiedCheckpoint(ctx, &forkchoicetypes.Checkpoint{}))
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 1, bra, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 1, bra, [32]byte{}, [32]byte{'A'}, ojc, ofc)
 	require.NoError(t, err)

 	bState, _ := util.DeterministicGenesisState(t, 10)
 	require.NoError(t, beaconDB.SaveState(ctx, bState, bra))
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 2, brb, bra, [32]byte{'B'}, [32]byte{'A'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 2, brb, bra, [32]byte{'B'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 3, brc, brb, [32]byte{'C'}, [32]byte{'B'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 3, brc, brb, [32]byte{'C'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 4, brd, brc, [32]byte{'D'}, [32]byte{'C'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 4, brd, brc, [32]byte{'D'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 5, bre, brb, [32]byte{'E'}, [32]byte{'D'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 5, bre, brb, [32]byte{'E'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 6, brf, bre, [32]byte{'F'}, [32]byte{'E'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 6, brf, bre, [32]byte{'F'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 7, brg, bre, [32]byte{'G'}, [32]byte{'F'}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 7, brg, bre, [32]byte{'G'}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))

@@ -510,10 +513,10 @@ func Test_NotifyNewPayload(t *testing.T) {
 	require.NoError(t, err)
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 1, r, [32]byte{}, [32]byte{'A'}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 1, r, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))

@@ -690,7 +693,7 @@ func Test_NotifyNewPayload(t *testing.T) {
 			}
 			service.cfg.ExecutionEngineCaller = e
 			root := [32]byte{'a'}
-			state, blkRoot, err := prepareForkchoiceState(ctx, 0, root, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+			state, blkRoot, err := prepareForkchoiceState(ctx, 0, root, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 			require.NoError(t, err)
 			require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 			postVersion, postHeader, err := getStateVersionAndPayload(tt.postState)
@@ -757,17 +760,17 @@ func Test_reportInvalidBlock(t *testing.T) {
 	service, tr := minimalTestService(t)
 	ctx, _, fcs := tr.ctx, tr.db, tr.fcs
 	jcp := &ethpb.Checkpoint{}
-	st, root, err := prepareForkchoiceState(ctx, 0, [32]byte{'A'}, [32]byte{}, [32]byte{'a'}, [32]byte{}, jcp, jcp)
+	st, root, err := prepareForkchoiceState(ctx, 0, [32]byte{'A'}, [32]byte{}, [32]byte{'a'}, jcp, jcp)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, root))
-	st, root, err = prepareForkchoiceState(ctx, 1, [32]byte{'B'}, [32]byte{'A'}, [32]byte{'b'}, [32]byte{'a'}, jcp, jcp)
+	st, root, err = prepareForkchoiceState(ctx, 1, [32]byte{'B'}, [32]byte{'A'}, [32]byte{'b'}, jcp, jcp)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, root))
-	st, root, err = prepareForkchoiceState(ctx, 2, [32]byte{'C'}, [32]byte{'B'}, [32]byte{'c'}, [32]byte{'b'}, jcp, jcp)
+	st, root, err = prepareForkchoiceState(ctx, 2, [32]byte{'C'}, [32]byte{'B'}, [32]byte{'c'}, jcp, jcp)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, root))

-	st, root, err = prepareForkchoiceState(ctx, 3, [32]byte{'D'}, [32]byte{'C'}, [32]byte{'d'}, [32]byte{'c'}, jcp, jcp)
+	st, root, err = prepareForkchoiceState(ctx, 3, [32]byte{'D'}, [32]byte{'C'}, [32]byte{'d'}, jcp, jcp)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, root))

@@ -929,7 +932,7 @@ func Test_UpdateLastValidatedCheckpoint(t *testing.T) {
 	fjc := &forkchoicetypes.Checkpoint{Epoch: 0, Root: params.BeaconConfig().ZeroHash}
 	require.NoError(t, fcs.UpdateJustifiedCheckpoint(ctx, fjc))
 	require.NoError(t, fcs.UpdateFinalizedCheckpoint(fjc))
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, genesisRoot, params.BeaconConfig().ZeroHash, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, genesisRoot, params.BeaconConfig().ZeroHash, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
 	fcs.SetOriginRoot(genesisRoot)
@@ -963,7 +966,7 @@ func Test_UpdateLastValidatedCheckpoint(t *testing.T) {
 	require.NoError(t, beaconDB.SaveStateSummary(ctx, opStateSummary))
 	tenjc := &ethpb.Checkpoint{Epoch: 10, Root: genesisRoot[:]}
 	tenfc := &ethpb.Checkpoint{Epoch: 10, Root: genesisRoot[:]}
-	state, blkRoot, err = prepareForkchoiceState(ctx, 320, opRoot, genesisRoot, params.BeaconConfig().ZeroHash, [32]byte{}, tenjc, tenfc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 320, opRoot, genesisRoot, params.BeaconConfig().ZeroHash, tenjc, tenfc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
 	assert.NoError(t, beaconDB.SaveGenesisBlockRoot(ctx, opRoot))
@@ -992,7 +995,7 @@ func Test_UpdateLastValidatedCheckpoint(t *testing.T) {
 	require.NoError(t, beaconDB.SaveStateSummary(ctx, validSummary))
 	twentyjc := &ethpb.Checkpoint{Epoch: 20, Root: validRoot[:]}
 	twentyfc := &ethpb.Checkpoint{Epoch: 20, Root: validRoot[:]}
-	state, blkRoot, err = prepareForkchoiceState(ctx, 640, validRoot, genesisRoot, params.BeaconConfig().ZeroHash, [32]byte{}, twentyjc, twentyfc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 640, validRoot, genesisRoot, params.BeaconConfig().ZeroHash, twentyjc, twentyfc)
 	require.NoError(t, err)
 	fcs.SetBalancesByRooter(func(_ context.Context, _ [32]byte) ([]uint64, error) { return []uint64{}, nil })
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
@@ -1054,8 +1057,8 @@ func TestService_removeInvalidBlockAndState(t *testing.T) {

 	require.NoError(t, service.removeInvalidBlockAndState(ctx, [][32]byte{r1, r2}))

-	require.Equal(t, false, service.chainHasBlock(ctx, r1))
-	require.Equal(t, false, service.chainHasBlock(ctx, r2))
+	require.Equal(t, false, service.hasBlock(ctx, r1))
+	require.Equal(t, false, service.hasBlock(ctx, r2))
 	require.Equal(t, false, service.cfg.BeaconDB.HasStateSummary(ctx, r1))
 	require.Equal(t, false, service.cfg.BeaconDB.HasStateSummary(ctx, r2))
 	has, err := service.cfg.StateGen.HasState(ctx, r1)
--- a/beacon-chain/blockchain/forkchoice_update_execution_test.go
+++ b/beacon-chain/blockchain/forkchoice_update_execution_test.go
@@ -122,13 +122,13 @@ func TestService_forkchoiceUpdateWithExecution_SameHeadRootNewProposer(t *testin

 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 1, altairBlkRoot, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 1, altairBlkRoot, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
-	state, blkRoot, err = prepareForkchoiceState(ctx, 2, bellatrixBlkRoot, altairBlkRoot, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 2, bellatrixBlkRoot, altairBlkRoot, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))

@@ -164,10 +164,10 @@ func TestShouldOverrideFCU(t *testing.T) {
 	headRoot := [32]byte{'b'}
 	parentRoot := [32]byte{'a'}
 	ojc := &ethpb.Checkpoint{}
-	st, root, err := prepareForkchoiceState(ctx, 1, parentRoot, [32]byte{}, [32]byte{}, [32]byte{}, ojc, ojc)
+	st, root, err := prepareForkchoiceState(ctx, 1, parentRoot, [32]byte{}, [32]byte{}, ojc, ojc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, root))
-	st, root, err = prepareForkchoiceState(ctx, 2, headRoot, parentRoot, [32]byte{}, [32]byte{}, ojc, ojc)
+	st, root, err = prepareForkchoiceState(ctx, 2, headRoot, parentRoot, [32]byte{}, ojc, ojc)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, root))

--- a/beacon-chain/blockchain/head_test.go
+++ b/beacon-chain/blockchain/head_test.go
@@ -48,7 +48,7 @@ func TestSaveHead_Different(t *testing.T) {
 	require.NoError(t, err)
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, oldBlock.Block().Slot(), oldRoot, oldBlock.Block().ParentRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, oldBlock.Block().Slot(), oldRoot, oldBlock.Block().ParentRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	service.head = &head{
@@ -63,11 +63,11 @@ func TestSaveHead_Different(t *testing.T) {
 	wsb := util.SaveBlock(t, context.Background(), service.cfg.BeaconDB, newHeadSignedBlock)
 	newRoot, err := newHeadBlock.HashTreeRoot()
 	require.NoError(t, err)
-	state, blkRoot, err = prepareForkchoiceState(ctx, slots.PrevSlot(wsb.Block().Slot()), wsb.Block().ParentRoot(), service.cfg.ForkChoiceStore.CachedHeadRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, slots.PrevSlot(wsb.Block().Slot()), wsb.Block().ParentRoot(), service.cfg.ForkChoiceStore.CachedHeadRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))

-	state, blkRoot, err = prepareForkchoiceState(ctx, wsb.Block().Slot(), newRoot, wsb.Block().ParentRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, wsb.Block().Slot(), newRoot, wsb.Block().ParentRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	headState, err := util.NewBeaconState()
@@ -101,7 +101,7 @@ func TestSaveHead_Different_Reorg(t *testing.T) {
 	require.NoError(t, err)
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, oldBlock.Block().Slot(), oldRoot, oldBlock.Block().ParentRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, oldBlock.Block().Slot(), oldRoot, oldBlock.Block().ParentRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	service.head = &head{
@@ -110,7 +110,7 @@ func TestSaveHead_Different_Reorg(t *testing.T) {
 	}

 	reorgChainParent := [32]byte{'B'}
-	state, blkRoot, err = prepareForkchoiceState(ctx, 0, reorgChainParent, oldRoot, oldBlock.Block().ParentRoot(), [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, 0, reorgChainParent, oldRoot, oldBlock.Block().ParentRoot(), ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))

@@ -122,7 +122,7 @@ func TestSaveHead_Different_Reorg(t *testing.T) {
 	wsb := util.SaveBlock(t, context.Background(), service.cfg.BeaconDB, newHeadSignedBlock)
 	newRoot, err := newHeadBlock.HashTreeRoot()
 	require.NoError(t, err)
-	state, blkRoot, err = prepareForkchoiceState(ctx, wsb.Block().Slot(), newRoot, wsb.Block().ParentRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, wsb.Block().Slot(), newRoot, wsb.Block().ParentRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	headState, err := util.NewBeaconState()
@@ -238,11 +238,11 @@ func TestRetrieveHead_ReadOnly(t *testing.T) {
 	wsb := util.SaveBlock(t, context.Background(), service.cfg.BeaconDB, newHeadSignedBlock)
 	newRoot, err := newHeadBlock.HashTreeRoot()
 	require.NoError(t, err)
-	state, blkRoot, err := prepareForkchoiceState(ctx, slots.PrevSlot(wsb.Block().Slot()), wsb.Block().ParentRoot(), service.cfg.ForkChoiceStore.CachedHeadRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, slots.PrevSlot(wsb.Block().Slot()), wsb.Block().ParentRoot(), service.cfg.ForkChoiceStore.CachedHeadRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))

-	state, blkRoot, err = prepareForkchoiceState(ctx, wsb.Block().Slot(), newRoot, wsb.Block().ParentRoot(), [32]byte{}, [32]byte{}, ojc, ofc)
+	state, blkRoot, err = prepareForkchoiceState(ctx, wsb.Block().Slot(), newRoot, wsb.Block().ParentRoot(), [32]byte{}, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	headState, err := util.NewBeaconState()
@@ -304,7 +304,7 @@ func TestSaveOrphanedAtts(t *testing.T) {
 	for _, blk := range []*ethpb.SignedBeaconBlock{blkG, blk1, blk2, blk3, blk4} {
 		r, err := blk.Block.HashTreeRoot()
 		require.NoError(t, err)
-		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, [32]byte{}, ojc, ofc)
+		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
@@ -381,7 +381,7 @@ func TestSaveOrphanedOps(t *testing.T) {
 	for _, blk := range []*ethpb.SignedBeaconBlock{blkG, blk1, blk2, blk3, blk4} {
 		r, err := blk.Block.HashTreeRoot()
 		require.NoError(t, err)
-		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, [32]byte{}, ojc, ofc)
+		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
@@ -451,7 +451,7 @@ func TestSaveOrphanedAtts_CanFilter(t *testing.T) {
 	for _, blk := range []*ethpb.SignedBeaconBlockCapella{blkG, blk1, blk2, blk4} {
 		r, err := blk.Block.HashTreeRoot()
 		require.NoError(t, err)
-		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, [32]byte{}, ojc, ofc)
+		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
@@ -509,7 +509,7 @@ func TestSaveOrphanedAtts_DoublyLinkedTrie(t *testing.T) {
 	for _, blk := range []*ethpb.SignedBeaconBlock{blkG, blk1, blk2, blk3, blk4} {
 		r, err := blk.Block.HashTreeRoot()
 		require.NoError(t, err)
-		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, [32]byte{}, ojc, ofc)
+		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
@@ -568,7 +568,7 @@ func TestSaveOrphanedAtts_CanFilter_DoublyLinkedTrie(t *testing.T) {
 	for _, blk := range []*ethpb.SignedBeaconBlock{blkG, blk1, blk2, blk4} {
 		r, err := blk.Block.HashTreeRoot()
 		require.NoError(t, err)
-		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, [32]byte{}, ojc, ofc)
+		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
@@ -583,7 +583,7 @@ func TestUpdateHead_noSavedChanges(t *testing.T) {
 	ctx, beaconDB, fcs := tr.ctx, tr.db, tr.fcs

 	ojp := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	st, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, [32]byte{}, [32]byte{}, ojp, ojp)
+	st, blkRoot, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, [32]byte{}, ojp, ojp)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, blkRoot))

@@ -603,7 +603,7 @@ func TestUpdateHead_noSavedChanges(t *testing.T) {
 	headRoot := service.headRoot()
 	require.Equal(t, [32]byte{}, headRoot)

-	st, blkRoot, err = prepareForkchoiceState(ctx, 0, bellatrixBlkRoot, [32]byte{}, [32]byte{}, [32]byte{}, fcp, fcp)
+	st, blkRoot, err = prepareForkchoiceState(ctx, 0, bellatrixBlkRoot, [32]byte{}, [32]byte{}, fcp, fcp)
 	require.NoError(t, err)
 	require.NoError(t, fcs.InsertNode(ctx, st, blkRoot))
 	fcs.SetBalancesByRooter(func(context.Context, [32]byte) ([]uint64, error) { return []uint64{1, 2}, nil })
--- a/beacon-chain/blockchain/log.go
+++ b/beacon-chain/blockchain/log.go
@@ -45,44 +45,28 @@ func logStateTransitionData(b interfaces.ReadOnlyBeaconBlock) error {
 		}
 		log = log.WithField("syncBitsCount", agg.SyncCommitteeBits.Count())
 	}
-	if b.Version() >= version.EPBS {
-		sh, err := b.Body().SignedExecutionPayloadHeader()
+	if b.Version() >= version.Bellatrix {
+		p, err := b.Body().Execution()
 		if err != nil {
 			return err
 		}
-		header, err := sh.Header()
-		if err != nil {
+		log = log.WithField("payloadHash", fmt.Sprintf("%#x", bytesutil.Trunc(p.BlockHash())))
+		txs, err := p.Transactions()
+		switch {
+		case errors.Is(err, consensus_types.ErrUnsupportedField):
+		case err != nil:
 			return err
+		default:
+			log = log.WithField("txCount", len(txs))
+			txsPerSlotCount.Set(float64(len(txs)))
 		}
-		log = log.WithFields(logrus.Fields{"payloadHash": fmt.Sprintf("%#x", header.BlockHash()),
-			"builderIndex":           header.BuilderIndex(),
-			"value":                  header.Value(),
-			"blobKzgCommitmentsRoot": fmt.Sprintf("%#x", header.BlobKzgCommitmentsRoot()),
-		})
-	} else {
-		if b.Version() >= version.Bellatrix {
-			p, err := b.Body().Execution()
-			if err != nil {
-				return err
-			}
-			log = log.WithField("payloadHash", fmt.Sprintf("%#x", bytesutil.Trunc(p.BlockHash())))
-			txs, err := p.Transactions()
-			switch {
-			case errors.Is(err, consensus_types.ErrUnsupportedField):
-			case err != nil:
-				return err
-			default:
-				log = log.WithField("txCount", len(txs))
-				txsPerSlotCount.Set(float64(len(txs)))
-			}
-		}
-		if b.Version() >= version.Deneb {
-			kzgs, err := b.Body().BlobKzgCommitments()
-			if err != nil {
-				log.WithError(err).Error("Failed to get blob KZG commitments")
-			} else if len(kzgs) > 0 {
-				log = log.WithField("kzgCommitmentCount", len(kzgs))
-			}
+	}
+	if b.Version() >= version.Deneb {
+		kzgs, err := b.Body().BlobKzgCommitments()
+		if err != nil {
+			log.WithError(err).Error("Failed to get blob KZG commitments")
+		} else if len(kzgs) > 0 {
+			log = log.WithField("kzgCommitmentCount", len(kzgs))
 		}
 	}
 	log.Info("Finished applying state transition")
@@ -113,18 +97,6 @@ func logBlockSyncStatus(block interfaces.ReadOnlyBeaconBlock, blockRoot [32]byte
 			"dataAvailabilityWaitedTime": daWaitedTime,
 			"deposits":                   len(block.Body().Deposits()),
 		}
-		if block.Version() >= version.EPBS {
-			ph, err := block.Body().SignedExecutionPayloadHeader()
-			if err != nil {
-				return err
-			}
-			header, err := ph.Header()
-			if err != nil {
-				return err
-			}
-			hash := header.ParentBlockHash()
-			lf["parentHash"] = fmt.Sprintf("0x%s...", hex.EncodeToString(hash[:])[:8])
-		}
 		log.WithFields(lf).Debug("Synced new block")
 	} else {
 		log.WithFields(logrus.Fields{
@@ -140,9 +112,6 @@ func logBlockSyncStatus(block interfaces.ReadOnlyBeaconBlock, blockRoot [32]byte

 // logs payload related data every slot.
 func logPayload(block interfaces.ReadOnlyBeaconBlock) error {
-	if block.Version() >= version.EPBS {
-		return nil
-	}
 	isExecutionBlk, err := blocks.IsExecutionBlock(block.Body())
 	if err != nil {
 		return errors.Wrap(err, "could not determine if block is execution block")
--- a/beacon-chain/blockchain/metrics.go
+++ b/beacon-chain/blockchain/metrics.go
@@ -182,10 +182,6 @@ var (
 		Name: "chain_service_processing_milliseconds",
 		Help: "Total time to call a chain service in ReceiveBlock()",
 	})
-	executionEngineProcessingTime = promauto.NewSummary(prometheus.SummaryOpts{
-		Name: "execution_engine_processing_milliseconds",
-		Help: "Total time to process an execution payload envelope in ReceiveExecutionPayloadEnvelope()",
-	})
 	dataAvailWaitedTime = promauto.NewSummary(prometheus.SummaryOpts{
 		Name: "da_waited_time_milliseconds",
 		Help: "Total time spent waiting for a data availability check in ReceiveBlock()",
--- a/beacon-chain/blockchain/options.go
+++ b/beacon-chain/blockchain/options.go
@@ -1,8 +1,6 @@
 package blockchain

 import (
-	"sync"
-
 	"github.com/prysmaticlabs/prysm/v5/async/event"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
 	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
@@ -18,6 +16,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/sync/rlnc"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 )

@@ -71,18 +70,10 @@ func WithDepositCache(c cache.DepositCache) Option {
 	}
 }

-// WithPayloadAttestationCache for payload attestation cache.
-func WithPayloadAttestationCache(c *cache.PayloadAttestationCache) Option {
+// WithChunkCommitter for chunk committer.
+func WithChunkCommitter(c *rlnc.Committer) Option {
 	return func(s *Service) error {
-		s.cfg.PayloadAttestationCache = c
-		return nil
-	}
-}
-
-// WithPayloadEnvelopeCache for payload envelope cache.
-func WithPayloadEnvelopeCache(c *sync.Map) Option {
-	return func(s *Service) error {
-		s.cfg.PayloadEnvelopeCache = c
+		s.cfg.ChunkCommitter = c
 		return nil
 	}
 }
--- a/beacon-chain/blockchain/process_attestation.go
+++ b/beacon-chain/blockchain/process_attestation.go
@@ -97,7 +97,7 @@ func (s *Service) OnAttestation(ctx context.Context, a ethpb.Att, disparity time
 	// We assume trusted attestation in this function has verified signature.

 	// Update forkchoice store with the new attestation for updating weight.
-	s.cfg.ForkChoiceStore.ProcessAttestation(ctx, indexedAtt.GetAttestingIndices(), bytesutil.ToBytes32(a.GetData().BeaconBlockRoot), a.GetData().Slot)
+	s.cfg.ForkChoiceStore.ProcessAttestation(ctx, indexedAtt.GetAttestingIndices(), bytesutil.ToBytes32(a.GetData().BeaconBlockRoot), a.GetData().Target.Epoch)

 	return nil
 }
--- a/beacon-chain/blockchain/process_attestation_test.go
+++ b/beacon-chain/blockchain/process_attestation_test.go
@@ -32,7 +32,7 @@ func TestStore_OnAttestation_ErrorConditions(t *testing.T) {
 	util.SaveBlock(t, ctx, beaconDB, blkWithoutState)

 	cp := &ethpb.Checkpoint{}
-	st, roblock, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, cp, cp)
+	st, roblock, err := prepareForkchoiceState(ctx, 0, [32]byte{}, [32]byte{}, params.BeaconConfig().ZeroHash, cp, cp)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))

@@ -41,7 +41,7 @@ func TestStore_OnAttestation_ErrorConditions(t *testing.T) {
 	r, err := blkWithStateBadAtt.Block.HashTreeRoot()
 	require.NoError(t, err)
 	cp = &ethpb.Checkpoint{Root: r[:]}
-	st, roblock, err = prepareForkchoiceState(ctx, blkWithStateBadAtt.Block.Slot, r, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, cp, cp)
+	st, roblock, err = prepareForkchoiceState(ctx, blkWithStateBadAtt.Block.Slot, r, [32]byte{}, params.BeaconConfig().ZeroHash, cp, cp)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
 	util.SaveBlock(t, ctx, beaconDB, blkWithStateBadAtt)
@@ -139,7 +139,7 @@ func TestStore_OnAttestation_Ok_DoublyLinkedTree(t *testing.T) {
 		require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, copied, tRoot))
 		ojc := &ethpb.Checkpoint{Epoch: 0, Root: tRoot[:]}
 		ofc := &ethpb.Checkpoint{Epoch: 0, Root: tRoot[:]}
-		state, roblock, err := prepareForkchoiceState(ctx, 0, tRoot, tRoot, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+		state, roblock, err := prepareForkchoiceState(ctx, 0, tRoot, tRoot, params.BeaconConfig().ZeroHash, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, roblock))
 		require.NoError(t, service.OnAttestation(ctx, att[0], 0))
@@ -170,7 +170,7 @@ func TestService_GetRecentPreState(t *testing.T) {
 	err = s.SetFinalizedCheckpoint(cp0)
 	require.NoError(t, err)

-	st, root, err := prepareForkchoiceState(ctx, 31, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, [32]byte{}, cp0, cp0)
+	st, root, err := prepareForkchoiceState(ctx, 31, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))
 	service.head = &head{
@@ -202,7 +202,7 @@ func TestService_GetAttPreState_Concurrency(t *testing.T) {
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, s, bytesutil.ToBytes32([]byte{'A'})))
 	require.NoError(t, service.cfg.BeaconDB.SaveStateSummary(ctx, &ethpb.StateSummary{Root: ckRoot}))

-	st, root, err := prepareForkchoiceState(ctx, 100, [32]byte(cp1.Root), [32]byte{}, [32]byte{'R'}, [32]byte{}, cp1, cp1)
+	st, root, err := prepareForkchoiceState(ctx, 100, [32]byte(cp1.Root), [32]byte{}, [32]byte{'R'}, cp1, cp1)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))

@@ -259,7 +259,7 @@ func TestStore_SaveCheckpointState(t *testing.T) {
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, s, bytesutil.ToBytes32([]byte{'A'})))
 	require.NoError(t, service.cfg.BeaconDB.SaveStateSummary(ctx, &ethpb.StateSummary{Root: bytesutil.PadTo([]byte{'A'}, fieldparams.RootLength)}))

-	st, root, err := prepareForkchoiceState(ctx, 1, [32]byte(cp1.Root), [32]byte{}, [32]byte{'R'}, [32]byte{}, cp1, cp1)
+	st, root, err := prepareForkchoiceState(ctx, 1, [32]byte(cp1.Root), [32]byte{}, [32]byte{'R'}, cp1, cp1)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))
 	s1, err := service.getAttPreState(ctx, cp1)
@@ -273,7 +273,7 @@ func TestStore_SaveCheckpointState(t *testing.T) {
 	_, err = service.getAttPreState(ctx, cp2)
 	require.ErrorContains(t, "epoch 2 root 0x4200000000000000000000000000000000000000000000000000000000000000: not a checkpoint in forkchoice", err)

-	st, root, err = prepareForkchoiceState(ctx, 33, [32]byte(cp2.Root), [32]byte(cp1.Root), [32]byte{'R'}, [32]byte{}, cp2, cp2)
+	st, root, err = prepareForkchoiceState(ctx, 33, [32]byte(cp2.Root), [32]byte(cp1.Root), [32]byte{'R'}, cp2, cp2)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))

@@ -298,7 +298,7 @@ func TestStore_SaveCheckpointState(t *testing.T) {
 	cp3 := &ethpb.Checkpoint{Epoch: 1, Root: bytesutil.PadTo([]byte{'C'}, fieldparams.RootLength)}
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, s, bytesutil.ToBytes32([]byte{'C'})))
 	require.NoError(t, service.cfg.BeaconDB.SaveStateSummary(ctx, &ethpb.StateSummary{Root: bytesutil.PadTo([]byte{'C'}, fieldparams.RootLength)}))
-	st, root, err = prepareForkchoiceState(ctx, 31, [32]byte(cp3.Root), [32]byte(cp2.Root), [32]byte{'P'}, [32]byte{}, cp2, cp2)
+	st, root, err = prepareForkchoiceState(ctx, 31, [32]byte(cp3.Root), [32]byte(cp2.Root), [32]byte{'P'}, cp2, cp2)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))

@@ -318,7 +318,7 @@ func TestStore_UpdateCheckpointState(t *testing.T) {
 	require.NoError(t, err)
 	checkpoint := &ethpb.Checkpoint{Epoch: epoch, Root: r1[:]}
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, baseState, bytesutil.ToBytes32(checkpoint.Root)))
-	st, roblock, err := prepareForkchoiceState(ctx, blk.Block.Slot, r1, [32]byte{}, params.BeaconConfig().ZeroHash, [32]byte{}, checkpoint, checkpoint)
+	st, roblock, err := prepareForkchoiceState(ctx, blk.Block.Slot, r1, [32]byte{}, params.BeaconConfig().ZeroHash, checkpoint, checkpoint)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
 	returned, err := service.getAttPreState(ctx, checkpoint)
@@ -336,7 +336,7 @@ func TestStore_UpdateCheckpointState(t *testing.T) {
 	require.NoError(t, err)
 	newCheckpoint := &ethpb.Checkpoint{Epoch: epoch, Root: r2[:]}
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, baseState, bytesutil.ToBytes32(newCheckpoint.Root)))
-	st, roblock, err = prepareForkchoiceState(ctx, blk.Block.Slot, r2, r1, params.BeaconConfig().ZeroHash, [32]byte{}, newCheckpoint, newCheckpoint)
+	st, roblock, err = prepareForkchoiceState(ctx, blk.Block.Slot, r2, r1, params.BeaconConfig().ZeroHash, newCheckpoint, newCheckpoint)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, roblock))
 	returned, err = service.getAttPreState(ctx, newCheckpoint)
--- a/beacon-chain/blockchain/process_block.go
+++ b/beacon-chain/blockchain/process_block.go
@@ -64,9 +64,7 @@ func (s *Service) postBlockProcess(cfg *postBlockProcessConfig) error {
 	fcuArgs := &fcuConfig{}

 	if s.inRegularSync() {
-		if cfg.roblock.Version() < version.EPBS {
-			defer s.handleSecondFCUCall(cfg, fcuArgs)
-		}
+		defer s.handleSecondFCUCall(cfg, fcuArgs)
 	}
 	if features.Get().EnableLightClient && slots.ToEpoch(s.CurrentSlot()) >= params.BeaconConfig().AltairForkEpoch {
 		defer s.processLightClientUpdates(cfg)
@@ -104,18 +102,6 @@ func (s *Service) postBlockProcess(cfg *postBlockProcessConfig) error {
 		s.logNonCanonicalBlockReceived(cfg.roblock.Root(), cfg.headRoot)
 		return nil
 	}
-	if cfg.roblock.Version() >= version.EPBS {
-		if err := s.saveHead(ctx, cfg.headRoot, cfg.roblock, cfg.postState); err != nil {
-			log.WithError(err).Error("could not save head")
-		}
-		if err := s.pruneAttsFromPool(cfg.roblock); err != nil {
-			log.WithError(err).Error("could not prune attestations from pool")
-		}
-
-		// update the NSC and handle epoch boundaries here since we do
-		// not send FCU at all
-		return s.updateCachesPostBlockProcessing(cfg)
-	}
 	if err := s.getFCUArgs(cfg, fcuArgs); err != nil {
 		log.WithError(err).Error("Could not get forkchoice update argument")
 		return nil
@@ -392,7 +378,7 @@ func (s *Service) handleBlockAttestations(ctx context.Context, blk interfaces.Re
 		}
 		r := bytesutil.ToBytes32(a.GetData().BeaconBlockRoot)
 		if s.cfg.ForkChoiceStore.HasNode(r) {
-			s.cfg.ForkChoiceStore.ProcessAttestation(ctx, indices, r, a.GetData().Slot)
+			s.cfg.ForkChoiceStore.ProcessAttestation(ctx, indices, r, a.GetData().Target.Epoch)
 		} else if features.Get().EnableExperimentalAttestationPool {
 			if err = s.cfg.AttestationCache.Add(a); err != nil {
 				return err
@@ -502,15 +488,9 @@ func (s *Service) runLateBlockTasks() {

 	attThreshold := params.BeaconConfig().SecondsPerSlot / 3
 	ticker := slots.NewSlotTickerWithOffset(s.genesisTime, time.Duration(attThreshold)*time.Second, params.BeaconConfig().SecondsPerSlot)
-	epbs := params.BeaconConfig().EPBSForkEpoch
 	for {
 		select {
-		case slot := <-ticker.C():
-			if slots.ToEpoch(slot) == epbs && slot%32 == 0 {
-				ticker.Done()
-				attThreshold := params.BeaconConfig().SecondsPerSlot / 4
-				ticker = slots.NewSlotTickerWithOffset(s.genesisTime, time.Duration(attThreshold)*time.Second, params.BeaconConfig().SecondsPerSlot)
-			}
+		case <-ticker.C():
 			s.lateBlockTasks(s.ctx)
 		case <-s.ctx.Done():
 			log.Debug("Context closed, exiting routine")
@@ -575,17 +555,13 @@ func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signed int
 	if err != nil {
 		return errors.Wrap(err, "could not get KZG commitments")
 	}
-
-	return s.isDataAvailableCore(ctx, kzgCommitments, root, block.Slot())
-}
-
-func (s *Service) isDataAvailableCore(ctx context.Context, kzgCommitments [][]byte, root [32]byte, slot primitives.Slot) error {
+	// expected is the number of kzg commitments observed in the block.
 	expected := len(kzgCommitments)
 	if expected == 0 {
 		return nil
 	}
-
-	missing, err := missingIndices(s.blobStorage, root, kzgCommitments, slot)
+	// get a map of BlobSidecar indices that are not currently available.
+	missing, err := missingIndices(s.blobStorage, root, kzgCommitments, block.Slot())
 	if err != nil {
 		return err
 	}
@@ -596,17 +572,17 @@ func (s *Service) isDataAvailableCore(ctx context.Context, kzgCommitments [][]by

 	// The gossip handler for blobs writes the index of each verified blob referencing the given
 	// root to the channel returned by blobNotifiers.forRoot.
-	nc := s.blobNotifiers.forRoot(root, slot)
+	nc := s.blobNotifiers.forRoot(root, block.Slot())

 	// Log for DA checks that cross over into the next slot; helpful for debugging.
-	nextSlot := slots.BeginsAt(slot+1, s.genesisTime)
+	nextSlot := slots.BeginsAt(signed.Block().Slot()+1, s.genesisTime)
 	// Avoid logging if DA check is called after next slot start.
 	if nextSlot.After(time.Now()) {
 		nst := time.AfterFunc(time.Until(nextSlot), func() {
 			if len(missing) == 0 {
 				return
 			}
-			log.WithFields(daCheckLogFields(root, slot, expected, len(missing))).
+			log.WithFields(daCheckLogFields(root, signed.Block().Slot(), expected, len(missing))).
 				Error("Still waiting for DA check at slot end.")
 		})
 		defer nst.Stop()
@@ -624,7 +600,7 @@ func (s *Service) isDataAvailableCore(ctx context.Context, kzgCommitments [][]by
 			s.blobNotifiers.delete(root)
 			return nil
 		case <-ctx.Done():
-			return errors.Wrapf(ctx.Err(), "context deadline waiting for blob sidecars slot: %d, BlockRoot: %#x", slot, root)
+			return errors.Wrapf(ctx.Err(), "context deadline waiting for blob sidecars slot: %d, BlockRoot: %#x", block.Slot(), root)
 		}
 	}
 }
@@ -690,36 +666,24 @@ func (s *Service) lateBlockTasks(ctx context.Context) {
 		return
 	}

-	if headState.Version() >= version.EPBS {
-		bh, err := headState.LatestBlockHash()
-		if err != nil {
-			log.WithError(err).Debug("could not perform late block tasks: failed to retrieve latest block hash")
-			return
-		}
-		_, err = s.notifyForkchoiceUpdateEPBS(ctx, [32]byte(bh), attribute)
-		if err != nil {
-			log.WithError(err).Debug("could not perform late block tasks: failed to update forkchoice with engine")
-		}
-	} else {
-		s.headLock.RLock()
-		headBlock, err := s.headBlock()
-		if err != nil {
-			s.headLock.RUnlock()
-			log.WithError(err).Debug("could not perform late block tasks: failed to retrieve head block")
-			return
-		}
+	s.headLock.RLock()
+	headBlock, err := s.headBlock()
+	if err != nil {
 		s.headLock.RUnlock()
+		log.WithError(err).Debug("could not perform late block tasks: failed to retrieve head block")
+		return
+	}
+	s.headLock.RUnlock()

-		fcuArgs := &fcuConfig{
-			headState:  headState,
-			headRoot:   headRoot,
-			headBlock:  headBlock,
-			attributes: attribute,
-		}
-		_, err = s.notifyForkchoiceUpdate(ctx, fcuArgs)
-		if err != nil {
-			log.WithError(err).Debug("could not perform late block tasks: failed to update forkchoice with engine")
-		}
+	fcuArgs := &fcuConfig{
+		headState:  headState,
+		headRoot:   headRoot,
+		headBlock:  headBlock,
+		attributes: attribute,
+	}
+	_, err = s.notifyForkchoiceUpdate(ctx, fcuArgs)
+	if err != nil {
+		log.WithError(err).Debug("could not perform late block tasks: failed to update forkchoice with engine")
 	}
 }

--- a/beacon-chain/blockchain/process_block_helpers.go
+++ b/beacon-chain/blockchain/process_block_helpers.go
@@ -368,31 +368,7 @@ func (s *Service) getBlockPreState(ctx context.Context, b interfaces.ReadOnlyBea
 		return nil, err
 	}

-	parentRoot := b.ParentRoot()
-	s.ForkChoicer().RLock()
-	slot, err := s.ForkChoicer().Slot(parentRoot)
-	s.ForkChoicer().RUnlock()
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get slot for parent root")
-	}
-	if slots.ToEpoch(slot) >= params.BeaconConfig().EPBSForkEpoch {
-		s.ForkChoicer().RLock()
-		parentHash := s.ForkChoicer().HashForBlockRoot(parentRoot)
-		s.ForkChoicer().RUnlock()
-		signedBid, err := b.Body().SignedExecutionPayloadHeader()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not get signed execution payload header")
-		}
-		bid, err := signedBid.Header()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not get execution payload header")
-		}
-		if parentHash == bid.ParentBlockHash() {
-			// It's based on full, use the state by hash
-			parentRoot = parentHash
-		}
-	}
-	preState, err := s.cfg.StateGen.StateByRoot(ctx, parentRoot)
+	preState, err := s.cfg.StateGen.StateByRoot(ctx, b.ParentRoot())
 	if err != nil {
 		return nil, errors.Wrapf(err, "could not get pre state for slot %d", b.Slot())
 	}
--- a/beacon-chain/blockchain/process_block_test.go
+++ b/beacon-chain/blockchain/process_block_test.go
@@ -142,7 +142,7 @@ func TestFillForkChoiceMissingBlocks_CanSave(t *testing.T) {
 	// the parent of the last block inserted is the tree node.
 	fcp := &ethpb.Checkpoint{Epoch: 0, Root: service.originBlockRoot[:]}
 	r0 := bytesutil.ToBytes32(roots[0])
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, r0, service.originBlockRoot, [32]byte{}, [32]byte{}, fcp, fcp)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, r0, service.originBlockRoot, [32]byte{}, fcp, fcp)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	fcp2 := &forkchoicetypes.Checkpoint{Epoch: 0, Root: r0}
@@ -184,7 +184,7 @@ func TestFillForkChoiceMissingBlocks_RootsMatch(t *testing.T) {
 	// the parent of the last block inserted is the tree node.
 	fcp := &ethpb.Checkpoint{Epoch: 0, Root: service.originBlockRoot[:]}
 	r0 := bytesutil.ToBytes32(roots[0])
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, r0, service.originBlockRoot, [32]byte{}, [32]byte{}, fcp, fcp)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, r0, service.originBlockRoot, [32]byte{}, fcp, fcp)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	fcp2 := &forkchoicetypes.Checkpoint{Epoch: 0, Root: r0}
@@ -464,7 +464,7 @@ func TestAncestor_CanUseForkchoice(t *testing.T) {
 		beaconBlock.Block.ParentRoot = bytesutil.PadTo(b.Block.ParentRoot, 32)
 		r, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
-		st, blkRoot, err := prepareForkchoiceState(context.Background(), b.Block.Slot, r, bytesutil.ToBytes32(b.Block.ParentRoot), params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+		st, blkRoot, err := prepareForkchoiceState(context.Background(), b.Block.Slot, r, bytesutil.ToBytes32(b.Block.ParentRoot), params.BeaconConfig().ZeroHash, ojc, ofc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blkRoot))
 	}
@@ -504,7 +504,7 @@ func TestAncestor_CanUseDB(t *testing.T) {
 		util.SaveBlock(t, context.Background(), beaconDB, beaconBlock)
 	}

-	st, blkRoot, err := prepareForkchoiceState(context.Background(), 200, r200, r200, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	st, blkRoot, err := prepareForkchoiceState(context.Background(), 200, r200, r200, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blkRoot))

@@ -651,24 +651,6 @@ func TestOnBlock_NilBlock(t *testing.T) {
 	require.Equal(t, true, IsInvalidBlock(err))
 }

-func TestOnBlock_InvalidSignature(t *testing.T) {
-	service, tr := minimalTestService(t)
-	ctx := tr.ctx
-
-	gs, keys := util.DeterministicGenesisState(t, 32)
-	require.NoError(t, service.saveGenesisData(ctx, gs))
-
-	blk, err := util.GenerateFullBlock(gs, keys, util.DefaultBlockGenConfig(), 1)
-	require.NoError(t, err)
-	blk.Signature = []byte{'a'} // Mutate the signature.
-	wsb, err := consensusblocks.NewSignedBeaconBlock(blk)
-	require.NoError(t, err)
-	preState, err := service.getBlockPreState(ctx, wsb.Block())
-	require.NoError(t, err)
-	_, err = service.validateStateTransition(ctx, preState, wsb)
-	require.Equal(t, true, IsInvalidBlock(err))
-}
-
 func TestOnBlock_CallNewPayloadAndForkchoiceUpdated(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	config := params.BeaconConfig()
@@ -1076,48 +1058,6 @@ func TestService_insertSlashingsToForkChoiceStore(t *testing.T) {
 	service.InsertSlashingsToForkChoiceStore(ctx, wb.Block().Body().AttesterSlashings())
 }

-func TestService_insertSlashingsToForkChoiceStoreElectra(t *testing.T) {
-	service, tr := minimalTestService(t)
-	ctx := tr.ctx
-
-	beaconState, privKeys := util.DeterministicGenesisStateElectra(t, 100)
-	att1 := util.HydrateIndexedAttestationElectra(&ethpb.IndexedAttestationElectra{
-		Data: &ethpb.AttestationData{
-			Source: &ethpb.Checkpoint{Epoch: 1},
-		},
-		AttestingIndices: []uint64{0, 1},
-	})
-	domain, err := signing.Domain(beaconState.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, beaconState.GenesisValidatorsRoot())
-	require.NoError(t, err)
-	signingRoot, err := signing.ComputeSigningRoot(att1.Data, domain)
-	assert.NoError(t, err, "Could not get signing root of beacon block header")
-	sig0 := privKeys[0].Sign(signingRoot[:])
-	sig1 := privKeys[1].Sign(signingRoot[:])
-	aggregateSig := bls.AggregateSignatures([]bls.Signature{sig0, sig1})
-	att1.Signature = aggregateSig.Marshal()
-
-	att2 := util.HydrateIndexedAttestationElectra(&ethpb.IndexedAttestationElectra{
-		AttestingIndices: []uint64{0, 1},
-	})
-	signingRoot, err = signing.ComputeSigningRoot(att2.Data, domain)
-	assert.NoError(t, err, "Could not get signing root of beacon block header")
-	sig0 = privKeys[0].Sign(signingRoot[:])
-	sig1 = privKeys[1].Sign(signingRoot[:])
-	aggregateSig = bls.AggregateSignatures([]bls.Signature{sig0, sig1})
-	att2.Signature = aggregateSig.Marshal()
-	slashings := []*ethpb.AttesterSlashingElectra{
-		{
-			Attestation_1: att1,
-			Attestation_2: att2,
-		},
-	}
-	b := util.NewBeaconBlockElectra()
-	b.Block.Body.AttesterSlashings = slashings
-	wb, err := consensusblocks.NewSignedBeaconBlock(b)
-	require.NoError(t, err)
-	service.InsertSlashingsToForkChoiceStore(ctx, wb.Block().Body().AttesterSlashings())
-}
-
 func TestOnBlock_ProcessBlocksParallel(t *testing.T) {
 	service, tr := minimalTestService(t)
 	ctx := tr.ctx
@@ -1153,7 +1093,7 @@ func TestOnBlock_ProcessBlocksParallel(t *testing.T) {
 	logHook := logTest.NewGlobal()
 	for i := 0; i < 10; i++ {
 		fc := &ethpb.Checkpoint{}
-		st, blkRoot, err := prepareForkchoiceState(ctx, 0, wsb1.Block().ParentRoot(), [32]byte{}, [32]byte{}, [32]byte{}, fc, fc)
+		st, blkRoot, err := prepareForkchoiceState(ctx, 0, wsb1.Block().ParentRoot(), [32]byte{}, [32]byte{}, fc, fc)
 		require.NoError(t, err)
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blkRoot))
 		var wg sync.WaitGroup
--- a/beacon-chain/blockchain/receive_attestation.go
+++ b/beacon-chain/blockchain/receive_attestation.go
@@ -11,7 +11,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/v5/config/features"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
-	payloadattribute "github.com/prysmaticlabs/prysm/v5/consensus-types/payload-attribute"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
@@ -149,35 +148,15 @@ func (s *Service) UpdateHead(ctx context.Context, proposingSlot primitives.Slot)
 		return
 	}
 	newAttHeadElapsedTime.Observe(float64(time.Since(start).Milliseconds()))
-	var attributes payloadattribute.Attributer
-	if s.inRegularSync() {
-		attributes = s.getPayloadAttribute(ctx, headState, proposingSlot, newHeadRoot[:])
-	}
-	if headState.Version() >= version.EPBS {
-		bh, err := headState.LatestBlockHash()
-		if err != nil {
-			log.WithError(err).Error("could not get latest block hash")
-			return
-		}
-		_, err = s.notifyForkchoiceUpdateEPBS(ctx, [32]byte(bh), attributes)
-		if err != nil {
-			log.WithError(err).Error("could not notify forkchoice update")
-		}
-		if err := s.saveHead(ctx, newHeadRoot, headBlock, headState); err != nil {
-			log.WithError(err).Error("could not save head")
-			return
-		}
-		if err := s.pruneAttsFromPool(headBlock); err != nil {
-			log.WithError(err).Error("could not prune attestations from pool")
-		}
-		return
-	}
 	fcuArgs := &fcuConfig{
 		headState:     headState,
 		headRoot:      newHeadRoot,
 		headBlock:     headBlock,
 		proposingSlot: proposingSlot,
 	}
+	if s.inRegularSync() {
+		fcuArgs.attributes = s.getPayloadAttribute(ctx, headState, proposingSlot, newHeadRoot[:])
+	}
 	if fcuArgs.attributes != nil && s.shouldOverrideFCU(newHeadRoot, proposingSlot) {
 		return
 	}
@@ -205,7 +184,7 @@ func (s *Service) processAttestations(ctx context.Context, disparity time.Durati
 		}

 		hasState := s.cfg.BeaconDB.HasStateSummary(ctx, bytesutil.ToBytes32(a.GetData().BeaconBlockRoot))
-		hasBlock := s.chainHasBlock(ctx, bytesutil.ToBytes32(a.GetData().BeaconBlockRoot))
+		hasBlock := s.hasBlock(ctx, bytesutil.ToBytes32(a.GetData().BeaconBlockRoot))
 		if !(hasState && hasBlock) {
 			continue
 		}
--- a/beacon-chain/blockchain/receive_attestation_test.go
+++ b/beacon-chain/blockchain/receive_attestation_test.go
@@ -42,11 +42,11 @@ func TestVerifyLMDFFGConsistent(t *testing.T) {

 	f := service.cfg.ForkChoiceStore
 	fc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, r32, err := prepareForkchoiceState(ctx, 32, [32]byte{'a'}, params.BeaconConfig().ZeroHash, params.BeaconConfig().ZeroHash, [32]byte{}, fc, fc)
+	state, r32, err := prepareForkchoiceState(ctx, 32, [32]byte{'a'}, params.BeaconConfig().ZeroHash, params.BeaconConfig().ZeroHash, fc, fc)
 	require.NoError(t, err)
 	require.NoError(t, f.InsertNode(ctx, state, r32))

-	state, r33, err := prepareForkchoiceState(ctx, 33, [32]byte{'b'}, r32.Root(), params.BeaconConfig().ZeroHash, [32]byte{}, fc, fc)
+	state, r33, err := prepareForkchoiceState(ctx, 33, [32]byte{'b'}, r32.Root(), params.BeaconConfig().ZeroHash, fc, fc)
 	require.NoError(t, err)
 	require.NoError(t, f.InsertNode(ctx, state, r33))

@@ -82,7 +82,7 @@ func TestProcessAttestations_Ok(t *testing.T) {
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, copied, tRoot))
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	state, blkRoot, err := prepareForkchoiceState(ctx, 0, tRoot, tRoot, params.BeaconConfig().ZeroHash, [32]byte{}, ojc, ofc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 0, tRoot, tRoot, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	attsToSave := make([]ethpb.Att, len(atts))
@@ -142,7 +142,7 @@ func TestService_ProcessAttestationsAndUpdateHead(t *testing.T) {
 	r, err := b.Block.HashTreeRoot()
 	require.NoError(t, err)
 	util.SaveBlock(t, ctx, service.cfg.BeaconDB, b)
-	state, blkRoot, err := prepareForkchoiceState(ctx, 2, r, service.originBlockRoot, [32]byte{'b'}, [32]byte{}, ojc, ojc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 2, r, service.originBlockRoot, [32]byte{'b'}, ojc, ojc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	require.Equal(t, 3, fcs.NodeCount())
@@ -191,7 +191,7 @@ func TestService_UpdateHead_NoAtts(t *testing.T) {
 	r, err := b.Block.HashTreeRoot()
 	require.NoError(t, err)
 	util.SaveBlock(t, ctx, service.cfg.BeaconDB, b)
-	state, blkRoot, err := prepareForkchoiceState(ctx, 2, r, service.originBlockRoot, [32]byte{'b'}, [32]byte{}, ojc, ojc)
+	state, blkRoot, err := prepareForkchoiceState(ctx, 2, r, service.originBlockRoot, [32]byte{'b'}, ojc, ojc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	require.Equal(t, 3, fcs.NodeCount())
--- a/beacon-chain/blockchain/receive_block.go
+++ b/beacon-chain/blockchain/receive_block.go
@@ -39,18 +39,10 @@ var epochsSinceFinalityExpandCache = primitives.Epoch(4)
 // BlockReceiver interface defines the methods of chain service for receiving and processing new blocks.
 type BlockReceiver interface {
 	ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte, avs das.AvailabilityStore) error
-	ReceiveExecutionPayloadEnvelope(ctx context.Context, env interfaces.ROSignedExecutionPayloadEnvelope, avs das.AvailabilityStore) error
 	ReceiveBlockBatch(ctx context.Context, blocks []blocks.ROBlock, avs das.AvailabilityStore) error
 	HasBlock(ctx context.Context, root [32]byte) bool
 	RecentBlockSlot(root [32]byte) (primitives.Slot, error)
 	BlockBeingSynced([32]byte) bool
-	PayloadBeingSynced([32]byte) bool
-}
-
-// PayloadAttestationReceiver defines methods of the chain service for receiving
-// and processing new payload attestations and payload attestation messages
-type PayloadAttestationReceiver interface {
-	ReceivePayloadAttestationMessage(ctx context.Context, a *ethpb.PayloadAttestationMessage) error
 }

 // BlobReceiver interface defines the methods of chain service for receiving new
@@ -59,11 +51,6 @@ type BlobReceiver interface {
 	ReceiveBlob(context.Context, blocks.VerifiedROBlob) error
 }

-// ExecutionPayloadReceiver interface defines the methods of chain service for receiving `ROExecutionPayloadEnvelope`.
-type ExecutionPayloadReceiver interface {
-	ReceiveExecutionPayloadEnvelope(ctx context.Context, envelope interfaces.ROSignedExecutionPayloadEnvelope, _ das.AvailabilityStore) error
-}
-
 // SlashingReceiver interface defines the methods of chain service for receiving validated slashing over the wire.
 type SlashingReceiver interface {
 	ReceiveAttesterSlashing(ctx context.Context, slashing ethpb.AttSlashing)
@@ -82,6 +69,10 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 		log.WithField("blockRoot", fmt.Sprintf("%#x", blockRoot)).Debug("Ignoring already synced block")
 		return nil
 	}
+	if s.BlockBeingSynced(blockRoot) {
+		log.WithField("blockRoot", fmt.Sprintf("%#x", blockRoot)).Debug("Ignoring already syncing block")
+		return nil
+	}
 	receivedTime := time.Now()
 	s.blockBeingSynced.set(blockRoot)
 	defer s.blockBeingSynced.unset(blockRoot)
@@ -100,30 +91,14 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 	if err != nil {
 		return err
 	}
-	var postState state.BeaconState
-	var isValidPayload bool
-	var daWaitedTime time.Duration
-	if blockCopy.Version() >= version.EPBS {
-		postState, err = s.validateStateTransition(ctx, preState, roblock)
-		if err != nil {
-			return errors.Wrap(err, "could not validate state transition")
-		}
-		optimistic, err := s.IsOptimisticForRoot(ctx, roblock.Block().ParentRoot())
-		if err != nil {
-			return errors.Wrap(err, "could not check if parent is optimistic")
-		}
-		// if the parent is not optimistic then we can set the block as
-		// not optimistic.
-		isValidPayload = !optimistic
-	} else {
-		postState, isValidPayload, err = s.validateExecutionAndConsensus(ctx, preState, roblock)
-		if err != nil {
-			return err
-		}
-		daWaitedTime, err = s.handleDA(ctx, blockCopy, blockRoot, avs)
-		if err != nil {
-			return err
-		}
+
+	postState, isValidPayload, err := s.validateExecutionAndConsensus(ctx, preState, roblock)
+	if err != nil {
+		return err
+	}
+	daWaitedTime, err := s.handleDA(ctx, blockCopy, blockRoot, avs)
+	if err != nil {
+		return err
 	}
 	// Defragment the state before continuing block processing.
 	s.defragmentState(postState)
@@ -497,9 +472,6 @@ func (s *Service) validateStateTransition(ctx context.Context, preState state.Be
 	stateTransitionStartTime := time.Now()
 	postState, err := transition.ExecuteStateTransition(ctx, preState, signed)
 	if err != nil {
-		if ctx.Err() != nil {
-			return nil, err
-		}
 		return nil, invalidBlock{error: err}
 	}
 	stateTransitionProcessingTime.Observe(float64(time.Since(stateTransitionStartTime).Milliseconds()))
--- a/beacon-chain/blockchain/receive_execution_payload_envelope.go
+++ b/beacon-chain/blockchain/receive_execution_payload_envelope.go
@@ -1,258 +0,0 @@
-package blockchain
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"time"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/das"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/execution"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	"github.com/sirupsen/logrus"
-	"go.opencensus.io/trace"
-	"golang.org/x/sync/errgroup"
-)
-
-// ReceiveExecutionPayloadEnvelope is a function that defines the operations (minus pubsub)
-// that are performed on a received execution payload envelope. The operations consist of:
-//  1. Validate the payload, apply state transition.
-//  2. Apply fork choice to the processed payload
-//  3. Save latest head info
-func (s *Service) ReceiveExecutionPayloadEnvelope(ctx context.Context, signed interfaces.ROSignedExecutionPayloadEnvelope, _ das.AvailabilityStore) error {
-	receivedTime := time.Now()
-	envelope, err := signed.Envelope()
-	if err != nil {
-		return err
-	}
-	root := envelope.BeaconBlockRoot()
-	s.payloadBeingSynced.set(envelope)
-	defer s.payloadBeingSynced.unset(root)
-
-	preState, err := s.getPayloadEnvelopePrestate(ctx, envelope)
-	if err != nil {
-		return errors.Wrap(err, "could not get prestate")
-	}
-
-	eg, _ := errgroup.WithContext(ctx)
-	eg.Go(func() error {
-		if err := epbs.ValidatePayloadStateTransition(ctx, preState, envelope); err != nil {
-			return errors.Wrap(err, "failed to validate consensus state transition function")
-		}
-		return nil
-	})
-	var isValidPayload bool
-	eg.Go(func() error {
-		var err error
-		isValidPayload, err = s.validateExecutionOnEnvelope(ctx, envelope)
-		if err != nil {
-			return errors.Wrap(err, "could not notify the engine of the new payload")
-		}
-		return nil
-	})
-
-	if err := eg.Wait(); err != nil {
-		return err
-	}
-	daStartTime := time.Now()
-	if err := s.isDataAvailableCore(ctx, envelope.BlobKzgCommitments(), root, envelope.Slot()); err != nil {
-		return errors.Wrap(err, "could not verify data availability")
-	}
-	daWaitedTime := time.Since(daStartTime)
-	dataAvailWaitedTime.Observe(float64(daWaitedTime.Milliseconds()))
-	if err := s.savePostPayload(ctx, signed, preState); err != nil {
-		return err
-	}
-	if err := s.insertPayloadEnvelope(envelope); err != nil {
-		return errors.Wrap(err, "could not insert payload to forkchoice")
-	}
-	if isValidPayload {
-		s.ForkChoicer().Lock()
-		if err := s.ForkChoicer().SetOptimisticToValid(ctx, root); err != nil {
-			s.ForkChoicer().Unlock()
-			return errors.Wrap(err, "could not set optimistic payload to valid")
-		}
-		s.ForkChoicer().Unlock()
-	}
-
-	headRoot, err := s.HeadRoot(ctx)
-	if err != nil {
-		log.WithError(err).Error("could not get headroot to compute attributes")
-		return nil
-	}
-	execution, err := envelope.Execution()
-	if err != nil {
-		log.WithError(err).Error("could not get execution data")
-		return nil
-	}
-	blockHash := [32]byte(execution.BlockHash())
-	if bytes.Equal(headRoot, root[:]) {
-		attr := s.getPayloadAttribute(ctx, preState, envelope.Slot()+1, headRoot)
-		payloadID, err := s.notifyForkchoiceUpdateEPBS(ctx, blockHash, attr)
-		if err != nil {
-			if IsInvalidBlock(err) {
-				// TODO handle the lvh here
-				return err
-			}
-			return nil
-		}
-		if attr != nil && !attr.IsEmpty() && payloadID != nil {
-			var pid [8]byte
-			copy(pid[:], payloadID[:])
-			log.WithFields(logrus.Fields{
-				"blockRoot": fmt.Sprintf("%#x", bytesutil.Trunc(headRoot)),
-				"headSlot":  envelope.Slot(),
-				"payloadID": fmt.Sprintf("%#x", bytesutil.Trunc(payloadID[:])),
-			}).Info("Forkchoice updated with payload attributes for proposal")
-			s.cfg.PayloadIDCache.Set(envelope.Slot()+1, root, pid)
-		}
-		// simply update the headstate in head
-		s.headLock.Lock()
-		s.head.state = preState.Copy()
-		s.headLock.Unlock()
-		// update the NSC with the hash for the full block, we use the block hash as the key
-		if err := transition.UpdateNextSlotCache(ctx, blockHash[:], preState); err != nil {
-			log.WithError(err).Error("could not update next slot cache with payload")
-		}
-
-	}
-	timeWithoutDaWait := time.Since(receivedTime) - daWaitedTime
-	executionEngineProcessingTime.Observe(float64(timeWithoutDaWait.Milliseconds()))
-	ex, err := envelope.Execution()
-	if err != nil {
-		return errors.Wrap(err, "could not get execution data")
-	}
-	// Send feed event
-	// Send notification of the processed block to the state feed.
-	s.cfg.StateNotifier.StateFeed().Send(&feed.Event{
-		Type: statefeed.PayloadProcessed,
-		Data: &statefeed.PayloadProcessedData{
-			Slot:                envelope.Slot(),
-			BlockRoot:           root,
-			ExecutionBlockHash:  blockHash,
-			ExecutionOptimistic: !isValidPayload,
-		},
-	})
-
-	log.WithFields(logrus.Fields{
-		"slot":               envelope.Slot(),
-		"blockRoot":          fmt.Sprintf("%#x", bytesutil.Trunc(root[:])),
-		"blockHash":          fmt.Sprintf("%#x", bytesutil.Trunc(ex.BlockHash())),
-		"ParentHash":         fmt.Sprintf("%#x", bytesutil.Trunc(ex.ParentHash())),
-		"KzgCommitmentCount": len(envelope.BlobKzgCommitments()),
-	}).Info("Processed execution payload envelope")
-	return nil
-}
-
-// notifyNewPayload signals execution engine on a new payload.
-// It returns true if the EL has returned VALID for the block
-func (s *Service) notifyNewEnvelope(ctx context.Context, envelope interfaces.ROExecutionPayloadEnvelope) (bool, error) {
-	ctx, span := trace.StartSpan(ctx, "blockChain.notifyNewPayload")
-	defer span.End()
-
-	payload, err := envelope.Execution()
-	if err != nil {
-		return false, errors.Wrap(err, "could not get execution payload")
-	}
-
-	versionedHashes := envelope.VersionedHashes()
-	root := envelope.BeaconBlockRoot()
-	parentRoot, err := s.ParentRoot(root)
-	if err != nil {
-		return false, errors.Wrap(err, "could not get parent block root")
-	}
-	pr := common.Hash(parentRoot)
-	requests := envelope.ExecutionRequests()
-	lastValidHash, err := s.cfg.ExecutionEngineCaller.NewPayload(ctx, payload, versionedHashes, &pr, requests)
-	switch {
-	case err == nil:
-		newPayloadValidNodeCount.Inc()
-		return true, nil
-	case errors.Is(err, execution.ErrAcceptedSyncingPayloadStatus):
-		newPayloadOptimisticNodeCount.Inc()
-		log.WithFields(logrus.Fields{
-			"payloadBlockHash": fmt.Sprintf("%#x", bytesutil.Trunc(payload.BlockHash())),
-		}).Info("Called new payload with optimistic block")
-		return false, nil
-	case errors.Is(err, execution.ErrInvalidPayloadStatus):
-		lvh := bytesutil.ToBytes32(lastValidHash)
-		return false, invalidBlock{
-			error:         ErrInvalidPayload,
-			lastValidHash: lvh,
-		}
-	default:
-		return false, errors.WithMessage(ErrUndefinedExecutionEngineError, err.Error())
-	}
-}
-
-// validateExecutionOnEnvelope notifies the engine of the incoming execution payload and returns true if the payload is valid
-func (s *Service) validateExecutionOnEnvelope(ctx context.Context, e interfaces.ROExecutionPayloadEnvelope) (bool, error) {
-	isValidPayload, err := s.notifyNewEnvelope(ctx, e)
-	if err == nil {
-		return isValidPayload, nil
-	}
-	blockRoot := e.BeaconBlockRoot()
-	parentRoot, rootErr := s.ParentRoot(blockRoot)
-	if rootErr != nil {
-		return false, errors.Wrap(rootErr, "could not get parent block root")
-	}
-	s.cfg.ForkChoiceStore.Lock()
-	err = s.handleInvalidExecutionError(ctx, err, blockRoot, parentRoot)
-	s.cfg.ForkChoiceStore.Unlock()
-	return false, err
-}
-
-func (s *Service) getPayloadEnvelopePrestate(ctx context.Context, e interfaces.ROExecutionPayloadEnvelope) (state.BeaconState, error) {
-	ctx, span := trace.StartSpan(ctx, "blockChain.getPayloadEnvelopePreState")
-	defer span.End()
-
-	// Verify incoming payload has a valid pre state.
-	root := e.BeaconBlockRoot()
-	// Verify the referred block is known to forkchoice
-	if !s.InForkchoice(root) {
-		return nil, errors.New("Cannot import execution payload envelope for unknown block")
-	}
-	if err := s.verifyBlkPreState(ctx, root); err != nil {
-		return nil, errors.Wrap(err, "could not verify payload prestate")
-	}
-
-	preState, err := s.cfg.StateGen.StateByRoot(ctx, root)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get pre state")
-	}
-	if preState == nil || preState.IsNil() {
-		return nil, errors.Wrap(err, "nil pre state")
-	}
-	return preState, nil
-}
-
-func (s *Service) savePostPayload(ctx context.Context, signed interfaces.ROSignedExecutionPayloadEnvelope, st state.BeaconState) error {
-	if err := s.cfg.BeaconDB.SaveBlindPayloadEnvelope(ctx, signed); err != nil {
-		return err
-	}
-	envelope, err := signed.Envelope()
-	if err != nil {
-		return err
-	}
-	execution, err := envelope.Execution()
-	if err != nil {
-		return err
-	}
-	r := envelope.BeaconBlockRoot()
-	if err := s.cfg.StateGen.SaveState(ctx, [32]byte(execution.BlockHash()), st); err != nil {
-		log.Warnf("Rolling back insertion of block with root %#x", r)
-		if err := s.cfg.BeaconDB.DeleteBlock(ctx, r); err != nil {
-			log.WithError(err).Errorf("Could not delete block with block root %#x", r)
-		}
-		return errors.Wrap(err, "could not save state")
-	}
-	return nil
-}
--- a/beacon-chain/blockchain/receive_execution_payload_envelope_test.go
+++ b/beacon-chain/blockchain/receive_execution_payload_envelope_test.go
@@ -1,103 +0,0 @@
-package blockchain
-
-import (
-	"testing"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/das"
-	mockExecution "github.com/prysmaticlabs/prysm/v5/beacon-chain/execution/testing"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-	"github.com/prysmaticlabs/prysm/v5/testing/util"
-	"github.com/prysmaticlabs/prysm/v5/testing/util/random"
-)
-
-func Test_getPayloadEnvelopePrestate(t *testing.T) {
-	service, tr := minimalTestService(t)
-	ctx, fcs := tr.ctx, tr.fcs
-
-	gs, _ := util.DeterministicGenesisStateEpbs(t, 32)
-	require.NoError(t, service.saveGenesisData(ctx, gs))
-	require.NoError(t, fcs.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Root: service.originBlockRoot}))
-
-	p := random.ExecutionPayloadEnvelope(t)
-	p.BeaconBlockRoot = service.originBlockRoot[:]
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-
-	_, err = service.getPayloadEnvelopePrestate(ctx, e)
-	require.NoError(t, err)
-}
-
-func Test_notifyNewEnvelope(t *testing.T) {
-	service, tr := minimalTestService(t, WithPayloadIDCache(cache.NewPayloadIDCache()))
-	ctx, fcs := tr.ctx, tr.fcs
-	gs, _ := util.DeterministicGenesisStateEpbs(t, 32)
-	require.NoError(t, service.saveGenesisData(ctx, gs))
-	require.NoError(t, fcs.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Root: service.originBlockRoot}))
-	p := random.ExecutionPayloadEnvelope(t)
-	p.BeaconBlockRoot = service.originBlockRoot[:]
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-	engine := &mockExecution.EngineClient{}
-	service.cfg.ExecutionEngineCaller = engine
-	isValidPayload, err := service.notifyNewEnvelope(ctx, e)
-	require.NoError(t, err)
-	require.Equal(t, true, isValidPayload)
-}
-
-func Test_validateExecutionOnEnvelope(t *testing.T) {
-	service, tr := minimalTestService(t, WithPayloadIDCache(cache.NewPayloadIDCache()))
-	ctx, fcs := tr.ctx, tr.fcs
-	gs, _ := util.DeterministicGenesisStateEpbs(t, 32)
-	require.NoError(t, service.saveGenesisData(ctx, gs))
-	require.NoError(t, fcs.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Root: service.originBlockRoot}))
-	p := random.ExecutionPayloadEnvelope(t)
-	p.BeaconBlockRoot = service.originBlockRoot[:]
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-	engine := &mockExecution.EngineClient{}
-	service.cfg.ExecutionEngineCaller = engine
-	isValidPayload, err := service.validateExecutionOnEnvelope(ctx, e)
-	require.NoError(t, err)
-	require.Equal(t, true, isValidPayload)
-}
-
-func Test_ReceiveExecutionPayloadEnvelope(t *testing.T) {
-	service, tr := minimalTestService(t, WithPayloadIDCache(cache.NewPayloadIDCache()))
-	ctx, fcs := tr.ctx, tr.fcs
-	gs, _ := util.DeterministicGenesisStateEpbs(t, 32)
-	require.NoError(t, service.saveGenesisData(ctx, gs))
-	require.NoError(t, fcs.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Root: service.originBlockRoot}))
-	post := gs.Copy()
-	p := &enginev1.ExecutionPayloadEnvelope{
-		Payload: &enginev1.ExecutionPayloadDeneb{
-			ParentHash: make([]byte, 32),
-			BlockHash:  make([]byte, 32),
-		},
-		BeaconBlockRoot:    service.originBlockRoot[:],
-		BlobKzgCommitments: make([][]byte, 0),
-		BeaconStateRoot:    make([]byte, 32),
-		ExecutionRequests:  &enginev1.ExecutionRequests{},
-	}
-	sp := &enginev1.SignedExecutionPayloadEnvelope{
-		Message: p,
-	}
-	e, err := blocks.WrappedROSignedExecutionPayloadEnvelope(sp)
-	require.NoError(t, err)
-	das := &das.MockAvailabilityStore{}
-
-	blockHeader := post.LatestBlockHeader()
-	prevStateRoot, err := post.HashTreeRoot(ctx)
-	require.NoError(t, err)
-	blockHeader.StateRoot = prevStateRoot[:]
-	require.NoError(t, post.SetLatestBlockHeader(blockHeader))
-	stRoot, err := post.HashTreeRoot(ctx)
-	require.NoError(t, err)
-	p.BeaconStateRoot = stRoot[:]
-	engine := &mockExecution.EngineClient{}
-	service.cfg.ExecutionEngineCaller = engine
-	require.NoError(t, service.ReceiveExecutionPayloadEnvelope(ctx, e, das))
-}
--- a/beacon-chain/blockchain/receive_payload_attestation_message.go
+++ b/beacon-chain/blockchain/receive_payload_attestation_message.go
@@ -1,33 +0,0 @@
-package blockchain
-
-import (
-	"context"
-	"slices"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-)
-
-func (s *Service) ReceivePayloadAttestationMessage(ctx context.Context, a *eth.PayloadAttestationMessage) error {
-	if err := helpers.ValidateNilPayloadAttestationMessage(a); err != nil {
-		return err
-	}
-	root := [32]byte(a.Data.BeaconBlockRoot)
-	st, err := s.HeadStateReadOnly(ctx)
-	if err != nil {
-		return err
-	}
-	ptc, err := helpers.GetPayloadTimelinessCommittee(ctx, st, a.Data.Slot)
-	if err != nil {
-		return err
-	}
-	idx := slices.Index(ptc, a.ValidatorIndex)
-	if idx == -1 {
-		return errInvalidValidatorIndex
-	}
-	if s.cfg.PayloadAttestationCache.Seen(root, uint64(primitives.ValidatorIndex(idx))) {
-		return nil
-	}
-	return s.cfg.PayloadAttestationCache.Add(a, uint64(idx))
-}
--- a/beacon-chain/blockchain/service.go
+++ b/beacon-chain/blockchain/service.go
@@ -32,6 +32,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/sync/rlnc"
 	"github.com/prysmaticlabs/prysm/v5/config/features"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
@@ -39,9 +40,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	prysmTime "github.com/prysmaticlabs/prysm/v5/time"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
 )
@@ -49,26 +48,24 @@ import (
 // Service represents a service that handles the internal
 // logic of managing the full PoS beacon chain.
 type Service struct {
-	cfg                           *config
-	ctx                           context.Context
-	cancel                        context.CancelFunc
-	genesisTime                   time.Time
-	head                          *head
-	headLock                      sync.RWMutex
-	originBlockRoot               [32]byte // genesis root, or weak subjectivity checkpoint root, depending on how the node is initialized
-	boundaryRoots                 [][32]byte
-	checkpointStateCache          *cache.CheckpointStateCache
-	initSyncBlocks                map[[32]byte]interfaces.ReadOnlySignedBeaconBlock
-	initSyncBlocksLock            sync.RWMutex
-	wsVerifier                    *WeakSubjectivityVerifier
-	clockSetter                   startup.ClockSetter
-	clockWaiter                   startup.ClockWaiter
-	syncComplete                  chan struct{}
-	blobNotifiers                 *blobNotifierMap
-	blockBeingSynced              *currentlySyncingBlock
-	lastPublishedLightClientEpoch primitives.Epoch
-	blobStorage                   *filesystem.BlobStorage
-	payloadBeingSynced            *currentlySyncingPayload
+	cfg                  *config
+	ctx                  context.Context
+	cancel               context.CancelFunc
+	genesisTime          time.Time
+	head                 *head
+	headLock             sync.RWMutex
+	originBlockRoot      [32]byte // genesis root, or weak subjectivity checkpoint root, depending on how the node is initialized
+	boundaryRoots        [][32]byte
+	checkpointStateCache *cache.CheckpointStateCache
+	initSyncBlocks       map[[32]byte]interfaces.ReadOnlySignedBeaconBlock
+	initSyncBlocksLock   sync.RWMutex
+	wsVerifier           *WeakSubjectivityVerifier
+	clockSetter          startup.ClockSetter
+	clockWaiter          startup.ClockWaiter
+	syncComplete         chan struct{}
+	blobNotifiers        *blobNotifierMap
+	blockBeingSynced     *currentlySyncingBlock
+	blobStorage          *filesystem.BlobStorage
 }

 // config options for the service.
@@ -77,8 +74,6 @@ type config struct {
 	ChainStartFetcher       execution.ChainStartFetcher
 	BeaconDB                db.HeadAccessDatabase
 	DepositCache            cache.DepositCache
-	PayloadAttestationCache *cache.PayloadAttestationCache
-	PayloadEnvelopeCache    *sync.Map
 	PayloadIDCache          *cache.PayloadIDCache
 	TrackedValidatorsCache  *cache.TrackedValidatorsCache
 	AttestationCache        *cache.AttestationCache
@@ -98,6 +93,7 @@ type config struct {
 	FinalizedStateAtStartUp state.BeaconState
 	ExecutionEngineCaller   execution.EngineCaller
 	SyncChecker             Checker
+	ChunkCommitter          *rlnc.Committer
 }

 // Checker is an interface used to determine if a node is in initial sync
@@ -189,7 +185,6 @@ func NewService(ctx context.Context, opts ...Option) (*Service, error) {
 		blobNotifiers:        bn,
 		cfg:                  &config{},
 		blockBeingSynced:     &currentlySyncingBlock{roots: make(map[[32]byte]struct{})},
-		payloadBeingSynced:   &currentlySyncingPayload{roots: make(map[[32]byte]primitives.PTCStatus)},
 	}
 	for _, opt := range opts {
 		if err := opt(srv); err != nil {
@@ -318,39 +313,6 @@ func (s *Service) StartFromSavedState(saved state.BeaconState) error {
 	if err != nil {
 		return errors.Wrap(err, "could not get finalized checkpoint block")
 	}
-	// Hack do deal with the right hash for the genesis block
-	if st.Version() > version.Bellatrix {
-		header, err := st.LatestExecutionPayloadHeader()
-		if err != nil {
-			return errors.Wrap(err, "could not get latest execution payload header")
-		}
-		execution, err := finalizedBlock.Block().Body().Execution()
-		if err != nil {
-			return errors.Wrap(err, "could not get execution")
-		}
-		switch st.Version() {
-		case version.Deneb, version.Electra:
-			bh, ok := execution.Proto().(*enginev1.ExecutionPayloadHeaderDeneb)
-			if !ok {
-				return errors.New("could not convert execution payload header")
-			}
-			bh.BlockHash = header.BlockHash()
-		case version.Capella:
-			bh, ok := execution.Proto().(*enginev1.ExecutionPayloadHeaderCapella)
-			if !ok {
-				return errors.New("could not convert execution payload header")
-			}
-			bh.BlockHash = header.BlockHash()
-		case version.Bellatrix:
-			bh, ok := execution.Proto().(*enginev1.ExecutionPayloadHeader)
-			if !ok {
-				return errors.New("could not convert execution payload header")
-			}
-			bh.BlockHash = header.BlockHash()
-		default:
-			return errors.New("unknown version")
-		}
-	}
 	roblock, err := blocks.NewROBlockWithRoot(finalizedBlock, fRoot)
 	if err != nil {
 		return err
@@ -598,7 +560,7 @@ func (s *Service) saveGenesisData(ctx context.Context, genesisState state.Beacon
 // 2.) Check DB.
 // Checking 1.) is ten times faster than checking 2.)
 // this function requires a lock in forkchoice
-func (s *Service) chainHasBlock(ctx context.Context, root [32]byte) bool {
+func (s *Service) hasBlock(ctx context.Context, root [32]byte) bool {
 	if s.cfg.ForkChoiceStore.HasNode(root) {
 		return true
 	}
--- a/beacon-chain/blockchain/service_test.go
+++ b/beacon-chain/blockchain/service_test.go
@@ -386,8 +386,8 @@ func TestHasBlock_ForkChoiceAndDB_DoublyLinkedTree(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, s.cfg.ForkChoiceStore.InsertNode(ctx, beaconState, roblock))

-	assert.Equal(t, false, s.chainHasBlock(ctx, [32]byte{}), "Should not have block")
-	assert.Equal(t, true, s.chainHasBlock(ctx, r), "Should have block")
+	assert.Equal(t, false, s.hasBlock(ctx, [32]byte{}), "Should not have block")
+	assert.Equal(t, true, s.hasBlock(ctx, r), "Should have block")
 }

 func TestServiceStop_SaveCachedBlocks(t *testing.T) {
--- a/beacon-chain/blockchain/setup_test.go
+++ b/beacon-chain/blockchain/setup_test.go
@@ -50,6 +50,11 @@ func (mb *mockBroadcaster) Broadcast(_ context.Context, _ proto.Message) error {
 	return nil
 }

+func (mb *mockBroadcaster) BroadcastBlockChunks(_ context.Context, _ []*ethpb.BeaconBlockChunk) error {
+	mb.broadcastCalled = true
+	return nil
+}
+
 func (mb *mockBroadcaster) BroadcastAttestation(_ context.Context, _ uint64, _ ethpb.Att) error {
 	mb.broadcastCalled = true
 	return nil
--- a/beacon-chain/blockchain/testing/BUILD.bazel
+++ b/beacon-chain/blockchain/testing/BUILD.bazel
@@ -3,10 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library")
 go_library(
    name = "go_default_library",
    testonly = True,
-    srcs = [
-        "mock.go",
-        "mock_epbs.go",
-    ],
+    srcs = ["mock.go"],
    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain/testing",
    visibility = [
        "//beacon-chain:__subpackages__",
--- a/beacon-chain/blockchain/testing/mock.go
+++ b/beacon-chain/blockchain/testing/mock.go
@@ -37,50 +37,44 @@ var ErrNilState = errors.New("nil state")

 // ChainService defines the mock interface for testing
 type ChainService struct {
-	NotFinalized                        bool
-	Optimistic                          bool
-	ValidAttestation                    bool
-	ValidatorsRoot                      [32]byte
-	PublicKey                           [fieldparams.BLSPubkeyLength]byte
-	FinalizedCheckPoint                 *ethpb.Checkpoint
-	CurrentJustifiedCheckPoint          *ethpb.Checkpoint
-	PreviousJustifiedCheckPoint         *ethpb.Checkpoint
-	Slot                                *primitives.Slot // Pointer because 0 is a useful value, so checking against it can be incorrect.
-	Balance                             *precompute.Balance
-	CanonicalRoots                      map[[32]byte]bool
-	Fork                                *ethpb.Fork
-	ETH1Data                            *ethpb.Eth1Data
-	InitSyncBlockRoots                  map[[32]byte]bool
-	DB                                  db.Database
-	State                               state.BeaconState
-	Block                               interfaces.ReadOnlySignedBeaconBlock
-	ExecutionPayloadEnvelope            interfaces.ROExecutionPayloadEnvelope
-	VerifyBlkDescendantErr              error
-	stateNotifier                       statefeed.Notifier
-	BlocksReceived                      []interfaces.ReadOnlySignedBeaconBlock
-	SyncCommitteeIndices                []primitives.CommitteeIndex
-	blockNotifier                       blockfeed.Notifier
-	opNotifier                          opfeed.Notifier
-	Root                                []byte
-	SyncCommitteeDomain                 []byte
-	SyncSelectionProofDomain            []byte
-	SyncContributionProofDomain         []byte
-	SyncCommitteePubkeys                [][]byte
-	Genesis                             time.Time
-	ForkChoiceStore                     forkchoice.ForkChoicer
-	ReceiveBlockMockErr                 error
-	ReceiveEnvelopeMockErr              error
-	OptimisticCheckRootReceived         [32]byte
-	FinalizedRoots                      map[[32]byte]bool
-	OptimisticRoots                     map[[32]byte]bool
-	BlockSlot                           primitives.Slot
-	SyncingRoot                         [32]byte
-	Blobs                               []blocks.VerifiedROBlob
-	TargetRoot                          [32]byte
-	HighestReceivedSlot                 primitives.Slot
-	HighestReceivedRoot                 [32]byte
-	PayloadStatus                       primitives.PTCStatus
-	ReceivePayloadAttestationMessageErr error
+	NotFinalized                bool
+	Optimistic                  bool
+	ValidAttestation            bool
+	ValidatorsRoot              [32]byte
+	PublicKey                   [fieldparams.BLSPubkeyLength]byte
+	FinalizedCheckPoint         *ethpb.Checkpoint
+	CurrentJustifiedCheckPoint  *ethpb.Checkpoint
+	PreviousJustifiedCheckPoint *ethpb.Checkpoint
+	Slot                        *primitives.Slot // Pointer because 0 is a useful value, so checking against it can be incorrect.
+	Balance                     *precompute.Balance
+	CanonicalRoots              map[[32]byte]bool
+	Fork                        *ethpb.Fork
+	ETH1Data                    *ethpb.Eth1Data
+	InitSyncBlockRoots          map[[32]byte]bool
+	DB                          db.Database
+	State                       state.BeaconState
+	Block                       interfaces.ReadOnlySignedBeaconBlock
+	VerifyBlkDescendantErr      error
+	stateNotifier               statefeed.Notifier
+	BlocksReceived              []interfaces.ReadOnlySignedBeaconBlock
+	SyncCommitteeIndices        []primitives.CommitteeIndex
+	blockNotifier               blockfeed.Notifier
+	opNotifier                  opfeed.Notifier
+	Root                        []byte
+	SyncCommitteeDomain         []byte
+	SyncSelectionProofDomain    []byte
+	SyncContributionProofDomain []byte
+	SyncCommitteePubkeys        [][]byte
+	Genesis                     time.Time
+	ForkChoiceStore             forkchoice.ForkChoicer
+	ReceiveBlockMockErr         error
+	OptimisticCheckRootReceived [32]byte
+	FinalizedRoots              map[[32]byte]bool
+	OptimisticRoots             map[[32]byte]bool
+	BlockSlot                   primitives.Slot
+	SyncingRoot                 [32]byte
+	Blobs                       []blocks.VerifiedROBlob
+	TargetRoot                  [32]byte
 }

 func (s *ChainService) Ancestor(ctx context.Context, root []byte, slot primitives.Slot) ([]byte, error) {
@@ -647,12 +641,12 @@ func (s *ChainService) ReceivedBlocksLastEpoch() (uint64, error) {
 	return 0, nil
 }

-// HighestReceivedBlockSlotRoot mocks the same method in the chain service
-func (s *ChainService) HighestReceivedBlockSlotRoot() (primitives.Slot, [32]byte) {
+// HighestReceivedBlockSlot mocks the same method in the chain service
+func (s *ChainService) HighestReceivedBlockSlot() primitives.Slot {
 	if s.ForkChoiceStore != nil {
-		return s.ForkChoiceStore.HighestReceivedBlockSlotRoot()
+		return s.ForkChoiceStore.HighestReceivedBlockSlot()
 	}
-	return s.HighestReceivedSlot, s.HighestReceivedRoot
+	return 0
 }

 // InsertNode mocks the same method in the chain service
@@ -697,11 +691,6 @@ func (*ChainService) UnrealizedJustifiedPayloadBlockHash() [32]byte {
 	return [32]byte{}
 }

-// PayloadBeingSynced mocks the same method in the chain service
-func (c *ChainService) PayloadBeingSynced(root [32]byte) bool {
-	return root == c.SyncingRoot
-}
-
 // BlockBeingSynced mocks the same method in the chain service
 func (c *ChainService) BlockBeingSynced(root [32]byte) bool {
 	return root == c.SyncingRoot
@@ -717,21 +706,3 @@ func (c *ChainService) ReceiveBlob(_ context.Context, b blocks.VerifiedROBlob) e
 func (c *ChainService) TargetRootForEpoch(_ [32]byte, _ primitives.Epoch) ([32]byte, error) {
 	return c.TargetRoot, nil
 }
-
-// HashInForkchoice mocks the same method in the chain service
-func (c *ChainService) HashInForkchoice([32]byte) bool {
-	return false
-}
-
-// ReceivePayloadAttestationMessage mocks the same method in the chain service
-func (c *ChainService) ReceivePayloadAttestationMessage(_ context.Context, _ *ethpb.PayloadAttestationMessage) error {
-	return c.ReceivePayloadAttestationMessageErr
-}
-
-func (c *ChainService) GetPTCVote(root [32]byte) primitives.PTCStatus {
-	return c.PayloadStatus
-}
-
-func (c *ChainService) HashForBlockRoot(_ context.Context, root [32]byte) ([]byte, error) {
-	return root[:], nil
-}
--- a/beacon-chain/blockchain/testing/mock_epbs.go
+++ b/beacon-chain/blockchain/testing/mock_epbs.go
@@ -1,30 +0,0 @@
-package testing
-
-import (
-	"context"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/das"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-)
-
-// ReceiveExecutionPayloadEnvelope mocks the  method in chain service.
-func (s *ChainService) ReceiveExecutionPayloadEnvelope(ctx context.Context, env interfaces.ROSignedExecutionPayloadEnvelope, _ das.AvailabilityStore) error {
-	if s.ReceiveBlockMockErr != nil {
-		return s.ReceiveBlockMockErr
-	}
-	if s.State == nil {
-		return ErrNilState
-	}
-	e, err := env.Envelope()
-	if err != nil {
-		return err
-	}
-
-	if s.State.Slot() == e.Slot() {
-		if err := s.State.SetLatestFullSlot(s.State.Slot()); err != nil {
-			return err
-		}
-	}
-	s.ExecutionPayloadEnvelope = e
-	return nil
-}
--- a/beacon-chain/cache/BUILD.bazel
+++ b/beacon-chain/cache/BUILD.bazel
@@ -16,13 +16,11 @@ go_library(
        "doc.go",
        "error.go",
        "interfaces.go",
-        "payload_attestation.go",
        "payload_id.go",
        "proposer_indices.go",
        "proposer_indices_disabled.go",  # keep
        "proposer_indices_type.go",
        "registration.go",
-        "signed_execution_header.go",
        "skip_slot_cache.go",
        "subnet_ids.go",
        "sync_committee.go",
@@ -52,7 +50,6 @@ go_library(
        "//encoding/bytesutil:go_default_library",
        "//math:go_default_library",
        "//monitoring/tracing/trace:go_default_library",
-        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//proto/prysm/v1alpha1/attestation:go_default_library",
        "//runtime/version:go_default_library",
@@ -78,12 +75,10 @@ go_test(
        "checkpoint_state_test.go",
        "committee_fuzz_test.go",
        "committee_test.go",
-        "payload_attestation_test.go",
        "payload_id_test.go",
        "private_access_test.go",
        "proposer_indices_test.go",
        "registration_test.go",
-        "signed_execution_header_test.go",
        "skip_slot_cache_test.go",
        "subnet_ids_test.go",
        "sync_committee_head_state_test.go",
@@ -98,10 +93,8 @@ go_test(
        "//config/fieldparams:go_default_library",
        "//config/params:go_default_library",
        "//consensus-types/primitives:go_default_library",
-        "//crypto/bls:go_default_library",
        "//crypto/bls/blst:go_default_library",
        "//encoding/bytesutil:go_default_library",
-        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//proto/prysm/v1alpha1/attestation:go_default_library",
        "//testing/assert:go_default_library",
--- a/beacon-chain/cache/payload_attestation.go
+++ b/beacon-chain/cache/payload_attestation.go
@@ -1,137 +0,0 @@
-package cache
-
-import (
-	"errors"
-	"fmt"
-	"sync"
-
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-)
-
-var errNilPayloadAttestationMessage = errors.New("nil Payload Attestation Message")
-
-// PayloadAttestationCache keeps a map of all the PTC votes that were seen,
-// already aggregated. The key is the beacon block root.
-type PayloadAttestationCache struct {
-	root         [32]byte
-	attestations [primitives.PAYLOAD_INVALID_STATUS]*eth.PayloadAttestation
-	sync.Mutex
-}
-
-// Seen returns true if a vote for the given Beacon Block Root has already been processed
-// for this Payload Timeliness Committee index. This will return true even if
-// the Payload status differs.
-func (p *PayloadAttestationCache) Seen(root [32]byte, idx uint64) bool {
-	p.Lock()
-	defer p.Unlock()
-	if p.root != root {
-		return false
-	}
-	for _, agg := range p.attestations {
-		if agg == nil {
-			continue
-		}
-		if agg.AggregationBits.BitAt(idx) {
-			return true
-		}
-	}
-	return false
-}
-
-// messageToPayloadAttestation creates a PayloadAttestation with a single
-// aggregated bit from the passed PayloadAttestationMessage
-func messageToPayloadAttestation(att *eth.PayloadAttestationMessage, idx uint64) *eth.PayloadAttestation {
-	bits := primitives.NewPayloadAttestationAggregationBits()
-	bits.SetBitAt(idx, true)
-	data := &eth.PayloadAttestationData{
-		BeaconBlockRoot: bytesutil.SafeCopyBytes(att.Data.BeaconBlockRoot),
-		Slot:            att.Data.Slot,
-		PayloadStatus:   att.Data.PayloadStatus,
-	}
-	return &eth.PayloadAttestation{
-		AggregationBits: bits,
-		Data:            data,
-		Signature:       bytesutil.SafeCopyBytes(att.Signature),
-	}
-}
-
-// aggregateSigFromMessage returns the aggregated signature from a Payload
-// Attestation by adding the passed signature in the PayloadAttestationMessage,
-// no signature validation is performed.
-func aggregateSigFromMessage(aggregated *eth.PayloadAttestation, message *eth.PayloadAttestationMessage) ([]byte, error) {
-	aggSig, err := bls.SignatureFromBytesNoValidation(aggregated.Signature)
-	if err != nil {
-		return nil, err
-	}
-	sig, err := bls.SignatureFromBytesNoValidation(message.Signature)
-	if err != nil {
-		return nil, err
-	}
-	return bls.AggregateSignatures([]bls.Signature{aggSig, sig}).Marshal(), nil
-}
-
-// Add adds a PayloadAttestationMessage to the internal cache of aggregated
-// PayloadAttestations.
-// If the index has already been seen for this attestation status the function does nothing.
-// If the root is not the cached root, the function will clear the previous cache
-// This function assumes that the message has already been validated. In
-// particular that the signature is valid and that the block root corresponds to
-// the given slot in the attestation data.
-func (p *PayloadAttestationCache) Add(att *eth.PayloadAttestationMessage, idx uint64) error {
-	if att == nil || att.Data == nil || att.Data.BeaconBlockRoot == nil {
-		return errNilPayloadAttestationMessage
-	}
-	p.Lock()
-	defer p.Unlock()
-	root := [32]byte(att.Data.BeaconBlockRoot)
-	if p.root != root {
-		p.root = root
-		p.attestations = [primitives.PAYLOAD_INVALID_STATUS]*eth.PayloadAttestation{}
-	}
-	if len(att.Data.PayloadStatus) != 1 {
-		return fmt.Errorf("expected payload status length 1, got %d", len(att.Data.PayloadStatus))
-	}
-	status := uint64(att.Data.PayloadStatus[0])
-	agg := p.attestations[status]
-	if agg == nil {
-		p.attestations[status] = messageToPayloadAttestation(att, idx)
-		return nil
-	}
-	if agg.AggregationBits.BitAt(idx) {
-		return nil
-	}
-	sig, err := aggregateSigFromMessage(agg, att)
-	if err != nil {
-		return err
-	}
-	agg.Signature = sig
-	agg.AggregationBits.SetBitAt(idx, true)
-	return nil
-}
-
-// Get returns the aggregated PayloadAttestation for the given root and status
-// if the root doesn't exist or status is invalid, the function returns nil.
-func (p *PayloadAttestationCache) Get(root [32]byte, status primitives.PTCStatus) *eth.PayloadAttestation {
-	p.Lock()
-	defer p.Unlock()
-
-	if p.root != root {
-		return nil
-	}
-	if status >= primitives.PAYLOAD_INVALID_STATUS {
-		return nil
-	}
-
-	return eth.CopyPayloadAttestation(p.attestations[status])
-}
-
-// Clear clears the internal map
-func (p *PayloadAttestationCache) Clear() {
-	p.Lock()
-	defer p.Unlock()
-	p.root = [32]byte{}
-	p.attestations = [primitives.PAYLOAD_INVALID_STATUS]*eth.PayloadAttestation{}
-}
--- a/beacon-chain/cache/payload_attestation_test.go
+++ b/beacon-chain/cache/payload_attestation_test.go
@@ -1,143 +0,0 @@
-package cache
-
-import (
-	"testing"
-
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-)
-
-func TestPayloadAttestationCache(t *testing.T) {
-	p := &PayloadAttestationCache{}
-
-	//Test Has seen
-	root := [32]byte{'r'}
-	idx := uint64(5)
-	require.Equal(t, false, p.Seen(root, idx))
-
-	// Test Add
-	msg := &eth.PayloadAttestationMessage{
-		Signature: bls.NewAggregateSignature().Marshal(),
-		Data: &eth.PayloadAttestationData{
-			BeaconBlockRoot: root[:],
-			Slot:            1,
-			PayloadStatus:   primitives.PAYLOAD_PRESENT,
-		},
-	}
-
-	// Add new root
-	require.NoError(t, p.Add(msg, idx))
-	require.Equal(t, true, p.Seen(root, idx))
-	require.Equal(t, root, p.root)
-	att := p.attestations[primitives.PAYLOAD_PRESENT]
-	indices := att.AggregationBits.BitIndices()
-	require.DeepEqual(t, []int{int(idx)}, indices)
-	singleSig := bytesutil.SafeCopyBytes(msg.Signature)
-	require.DeepEqual(t, singleSig, att.Signature)
-
-	// Test Seen
-	require.Equal(t, true, p.Seen(root, idx))
-	require.Equal(t, false, p.Seen(root, idx+1))
-
-	// Add another attestation on the same data
-	msg2 := &eth.PayloadAttestationMessage{
-		Signature: bls.NewAggregateSignature().Marshal(),
-		Data:      att.Data,
-	}
-	idx2 := uint64(7)
-	require.NoError(t, p.Add(msg2, idx2))
-	att = p.attestations[primitives.PAYLOAD_PRESENT]
-	indices = att.AggregationBits.BitIndices()
-	require.DeepEqual(t, []int{int(idx), int(idx2)}, indices)
-	require.DeepNotEqual(t, att.Signature, msg.Signature)
-
-	// Try again the same index
-	require.NoError(t, p.Add(msg2, idx2))
-	att2 := p.attestations[primitives.PAYLOAD_PRESENT]
-	indices = att.AggregationBits.BitIndices()
-	require.DeepEqual(t, []int{int(idx), int(idx2)}, indices)
-	require.DeepEqual(t, att, att2)
-
-	// Test Seen
-	require.Equal(t, true, p.Seen(root, idx2))
-	require.Equal(t, false, p.Seen(root, idx2+1))
-
-	// Add another payload status for a different payload status
-	msg3 := &eth.PayloadAttestationMessage{
-		Signature: bls.NewAggregateSignature().Marshal(),
-		Data: &eth.PayloadAttestationData{
-			BeaconBlockRoot: root[:],
-			Slot:            1,
-			PayloadStatus:   primitives.PAYLOAD_WITHHELD,
-		},
-	}
-	idx3 := uint64(17)
-
-	require.NoError(t, p.Add(msg3, idx3))
-	att3 := p.attestations[primitives.PAYLOAD_WITHHELD]
-	indices3 := att3.AggregationBits.BitIndices()
-	require.DeepEqual(t, []int{int(idx3)}, indices3)
-	require.DeepEqual(t, singleSig, att3.Signature)
-
-	// Add a different root
-	root2 := [32]byte{'s'}
-	msg.Data.BeaconBlockRoot = root2[:]
-	require.NoError(t, p.Add(msg, idx))
-	require.Equal(t, root2, p.root)
-	require.Equal(t, true, p.Seen(root2, idx))
-	require.Equal(t, false, p.Seen(root, idx))
-	att = p.attestations[primitives.PAYLOAD_PRESENT]
-	indices = att.AggregationBits.BitIndices()
-	require.DeepEqual(t, []int{int(idx)}, indices)
-}
-
-func TestPayloadAttestationCache_Get(t *testing.T) {
-	root := [32]byte{1, 2, 3}
-	wrongRoot := [32]byte{4, 5, 6}
-	status := primitives.PAYLOAD_PRESENT
-	invalidStatus := primitives.PAYLOAD_INVALID_STATUS
-
-	cache := &PayloadAttestationCache{
-		root: root,
-		attestations: [primitives.PAYLOAD_INVALID_STATUS]*eth.PayloadAttestation{
-			{
-				Signature: []byte{1},
-			},
-			{
-				Signature: []byte{2},
-			},
-			{
-				Signature: []byte{3},
-			},
-		},
-	}
-
-	t.Run("valid root and status", func(t *testing.T) {
-		result := cache.Get(root, status)
-		require.NotNil(t, result, "Expected a non-nil result")
-		require.DeepEqual(t, cache.attestations[status], result)
-	})
-
-	t.Run("invalid root", func(t *testing.T) {
-		result := cache.Get(wrongRoot, status)
-		require.IsNil(t, result)
-	})
-
-	t.Run("status out of bound", func(t *testing.T) {
-		result := cache.Get(root, invalidStatus)
-		require.IsNil(t, result)
-	})
-
-	t.Run("no attestation", func(t *testing.T) {
-		emptyCache := &PayloadAttestationCache{
-			root:         root,
-			attestations: [primitives.PAYLOAD_INVALID_STATUS]*eth.PayloadAttestation{},
-		}
-
-		result := emptyCache.Get(root, status)
-		require.IsNil(t, result)
-	})
-}
--- a/beacon-chain/cache/signed_execution_header.go
+++ b/beacon-chain/cache/signed_execution_header.go
@@ -1,76 +0,0 @@
-package cache
-
-import (
-	"bytes"
-	"sync"
-
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-)
-
-// ExecutionPayloadHeaders is used  by the sync service to store signed execution payload headers after they pass validation,
-// and filter out subsequent headers with lower value.
-// The signed header from this cache could be used by the proposer when proposing the next slot.
-type ExecutionPayloadHeaders struct {
-	headers map[primitives.Slot][]*enginev1.SignedExecutionPayloadHeader
-	sync.RWMutex
-}
-
-func NewExecutionPayloadHeaders() *ExecutionPayloadHeaders {
-	return &ExecutionPayloadHeaders{
-		headers: make(map[primitives.Slot][]*enginev1.SignedExecutionPayloadHeader),
-	}
-}
-
-// SaveSignedExecutionPayloadHeader saves the signed execution payload header to the cache.
-// The cache stores headers for up to two slots. If the input slot is higher than the lowest slot
-// currently in the cache, the lowest slot is removed to make space for the new header.
-// Only the highest value header for a given parent block hash will be stored.
-// This function assumes caller already checks header's slot is current or next slot, it doesn't account for slot validation.
-func (c *ExecutionPayloadHeaders) SaveSignedExecutionPayloadHeader(header *enginev1.SignedExecutionPayloadHeader) {
-	c.Lock()
-	defer c.Unlock()
-
-	for s := range c.headers {
-		if s+1 < header.Message.Slot {
-			delete(c.headers, s)
-		}
-	}
-
-	// Add or update the header in the map
-	if _, ok := c.headers[header.Message.Slot]; !ok {
-		c.headers[header.Message.Slot] = []*enginev1.SignedExecutionPayloadHeader{header}
-	} else {
-		found := false
-		for i, h := range c.headers[header.Message.Slot] {
-			if bytes.Equal(h.Message.ParentBlockHash, header.Message.ParentBlockHash) && bytes.Equal(h.Message.ParentBlockRoot, header.Message.ParentBlockRoot) {
-				if header.Message.Value > h.Message.Value {
-					c.headers[header.Message.Slot][i] = header
-				}
-				found = true
-				break
-			}
-		}
-		if !found {
-			c.headers[header.Message.Slot] = append(c.headers[header.Message.Slot], header)
-		}
-	}
-}
-
-// SignedExecutionPayloadHeader returns the signed payload header for the given slot and parent block hash and block root.
-// Returns nil if the header is not found.
-// This should be used when the caller wants the header to match parent block hash and parent block root such as proposer choosing a header to propose.
-func (c *ExecutionPayloadHeaders) SignedExecutionPayloadHeader(slot primitives.Slot, parentBlockHash []byte, parentBlockRoot []byte) *enginev1.SignedExecutionPayloadHeader {
-	c.RLock()
-	defer c.RUnlock()
-
-	if headers, ok := c.headers[slot]; ok {
-		for _, header := range headers {
-			if bytes.Equal(header.Message.ParentBlockHash, parentBlockHash) && bytes.Equal(header.Message.ParentBlockRoot, parentBlockRoot) {
-				return header
-			}
-		}
-	}
-
-	return nil
-}
--- a/beacon-chain/cache/signed_execution_header_test.go
+++ b/beacon-chain/cache/signed_execution_header_test.go
@@ -1,243 +0,0 @@
-package cache
-
-import (
-	"testing"
-
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-)
-
-func Test_SaveSignedExecutionPayloadHeader(t *testing.T) {
-	t.Run("First header should be added to cache", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				Value:           100,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header)
-		require.Equal(t, 1, len(c.headers))
-		require.Equal(t, header, c.headers[1][0])
-	})
-
-	t.Run("Second header with higher slot should be added, and both slots should be in cache", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header1 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				Value:           100,
-			},
-		}
-		header2 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           100,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header1)
-		c.SaveSignedExecutionPayloadHeader(header2)
-		require.Equal(t, 2, len(c.headers))
-		require.Equal(t, header1, c.headers[1][0])
-		require.Equal(t, header2, c.headers[2][0])
-	})
-
-	t.Run("Third header with higher slot should replace the oldest slot", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header1 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				Value:           100,
-			},
-		}
-		header2 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           100,
-			},
-		}
-		header3 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            3,
-				ParentBlockHash: []byte("parent3"),
-				Value:           100,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header1)
-		c.SaveSignedExecutionPayloadHeader(header2)
-		c.SaveSignedExecutionPayloadHeader(header3)
-		require.Equal(t, 2, len(c.headers))
-		require.Equal(t, header2, c.headers[2][0])
-		require.Equal(t, header3, c.headers[3][0])
-	})
-
-	t.Run("Header with same slot but higher value should replace the existing one", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header1 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           100,
-			},
-		}
-		header2 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           200,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header1)
-		c.SaveSignedExecutionPayloadHeader(header2)
-		require.Equal(t, 1, len(c.headers[2]))
-		require.Equal(t, header2, c.headers[2][0])
-	})
-
-	t.Run("Header with different parent block hash should be appended to the same slot", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header1 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent1"),
-				Value:           100,
-			},
-		}
-		header2 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           200,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header1)
-		c.SaveSignedExecutionPayloadHeader(header2)
-		require.Equal(t, 2, len(c.headers[2]))
-		require.Equal(t, header1, c.headers[2][0])
-		require.Equal(t, header2, c.headers[2][1])
-	})
-}
-
-func TestSignedExecutionPayloadHeader(t *testing.T) {
-	t.Run("Return header when slot and parentBlockHash match", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				ParentBlockRoot: []byte("root1"),
-				Value:           100,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header)
-		result := c.SignedExecutionPayloadHeader(1, []byte("parent1"), []byte("root1"))
-		require.NotNil(t, result)
-		require.Equal(t, header, result)
-	})
-
-	t.Run("Return nil when no matching slot and parentBlockHash", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				ParentBlockRoot: []byte("root1"),
-				Value:           100,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header)
-		result := c.SignedExecutionPayloadHeader(2, []byte("parent2"), []byte("root1"))
-		require.IsNil(t, result)
-	})
-
-	t.Run("Return nil when no matching slot and parentBlockRoot", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				ParentBlockRoot: []byte("root1"),
-				Value:           100,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header)
-		result := c.SignedExecutionPayloadHeader(2, []byte("parent1"), []byte("root2"))
-		require.IsNil(t, result)
-	})
-
-	t.Run("Return header when there are two slots in the cache and a match is found", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header1 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				Value:           100,
-			},
-		}
-		header2 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           200,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header1)
-		c.SaveSignedExecutionPayloadHeader(header2)
-
-		// Check for the first header
-		result1 := c.SignedExecutionPayloadHeader(1, []byte("parent1"), []byte{})
-		require.NotNil(t, result1)
-		require.Equal(t, header1, result1)
-
-		// Check for the second header
-		result2 := c.SignedExecutionPayloadHeader(2, []byte("parent2"), []byte{})
-		require.NotNil(t, result2)
-		require.Equal(t, header2, result2)
-	})
-
-	t.Run("Return nil when slot is evicted from cache", func(t *testing.T) {
-		c := NewExecutionPayloadHeaders()
-		header1 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            1,
-				ParentBlockHash: []byte("parent1"),
-				Value:           100,
-			},
-		}
-		header2 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            2,
-				ParentBlockHash: []byte("parent2"),
-				Value:           200,
-			},
-		}
-		header3 := &enginev1.SignedExecutionPayloadHeader{
-			Message: &enginev1.ExecutionPayloadHeaderEPBS{
-				Slot:            3,
-				ParentBlockHash: []byte("parent3"),
-				Value:           300,
-			},
-		}
-		c.SaveSignedExecutionPayloadHeader(header1)
-		c.SaveSignedExecutionPayloadHeader(header2)
-		c.SaveSignedExecutionPayloadHeader(header3)
-
-		// The first slot should be evicted, so result should be nil
-		result := c.SignedExecutionPayloadHeader(1, []byte("parent1"), []byte{})
-		require.IsNil(t, result)
-
-		// The second slot should still be present
-		result = c.SignedExecutionPayloadHeader(2, []byte("parent2"), []byte{})
-		require.NotNil(t, result)
-		require.Equal(t, header2, result)
-
-		// The third slot should be present
-		result = c.SignedExecutionPayloadHeader(3, []byte("parent3"), []byte{})
-		require.NotNil(t, result)
-		require.Equal(t, header3, result)
-	})
-}
--- a/beacon-chain/core/blocks/BUILD.bazel
+++ b/beacon-chain/core/blocks/BUILD.bazel
@@ -107,7 +107,6 @@ go_test(
        "//testing/assert:go_default_library",
        "//testing/require:go_default_library",
        "//testing/util:go_default_library",
-        "//testing/util/random:go_default_library",
        "//time/slots:go_default_library",
        "@com_github_google_gofuzz//:go_default_library",
        "@com_github_prysmaticlabs_go_bitfield//:go_default_library",
--- a/beacon-chain/core/blocks/attester_slashing_test.go
+++ b/beacon-chain/core/blocks/attester_slashing_test.go
@@ -7,14 +7,12 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
 	v "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/validators"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	ethpb "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"
 	"github.com/prysmaticlabs/prysm/v5/testing/util"
@@ -107,162 +105,293 @@ func TestProcessAttesterSlashings_IndexedAttestationFailedToVerify(t *testing.T)
 }

 func TestProcessAttesterSlashings_AppliesCorrectStatus(t *testing.T) {
-	statePhase0, keysPhase0 := util.DeterministicGenesisState(t, 100)
-	stateAltair, keysAltair := util.DeterministicGenesisStateAltair(t, 100)
-	stateBellatrix, keysBellatrix := util.DeterministicGenesisStateBellatrix(t, 100)
-	stateCapella, keysCapella := util.DeterministicGenesisStateCapella(t, 100)
-	stateDeneb, keysDeneb := util.DeterministicGenesisStateDeneb(t, 100)
-	stateElectra, keysElectra := util.DeterministicGenesisStateElectra(t, 100)
+	beaconState, privKeys := util.DeterministicGenesisState(t, 100)
+	for _, vv := range beaconState.Validators() {
+		vv.WithdrawableEpoch = primitives.Epoch(params.BeaconConfig().SlotsPerEpoch)
+	}

-	att1Phase0 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+	att1 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
 		Data: &ethpb.AttestationData{
 			Source: &ethpb.Checkpoint{Epoch: 1},
 		},
 		AttestingIndices: []uint64{0, 1},
 	})
-	att2Phase0 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
-		AttestingIndices: []uint64{0, 1},
-	})
-	att1Electra := util.HydrateIndexedAttestationElectra(&ethpb.IndexedAttestationElectra{
-		Data: &ethpb.AttestationData{
-			Source: &ethpb.Checkpoint{Epoch: 1},
-		},
-		AttestingIndices: []uint64{0, 1},
-	})
-	att2Electra := util.HydrateIndexedAttestationElectra(&ethpb.IndexedAttestationElectra{
+	domain, err := signing.Domain(beaconState.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, beaconState.GenesisValidatorsRoot())
+	require.NoError(t, err)
+	signingRoot, err := signing.ComputeSigningRoot(att1.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 := privKeys[0].Sign(signingRoot[:])
+	sig1 := privKeys[1].Sign(signingRoot[:])
+	aggregateSig := bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att1.Signature = aggregateSig.Marshal()
+
+	att2 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
 		AttestingIndices: []uint64{0, 1},
 	})
+	signingRoot, err = signing.ComputeSigningRoot(att2.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 = privKeys[0].Sign(signingRoot[:])
+	sig1 = privKeys[1].Sign(signingRoot[:])
+	aggregateSig = bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att2.Signature = aggregateSig.Marshal()

-	slashingPhase0 := &ethpb.AttesterSlashing{
-		Attestation_1: att1Phase0,
-		Attestation_2: att2Phase0,
-	}
-	slashingElectra := &ethpb.AttesterSlashingElectra{
-		Attestation_1: att1Electra,
-		Attestation_2: att2Electra,
-	}
-
-	type testCase struct {
-		name           string
-		st             state.BeaconState
-		keys           []bls.SecretKey
-		att1           ethpb.IndexedAtt
-		att2           ethpb.IndexedAtt
-		slashing       ethpb.AttSlashing
-		slashedBalance uint64
-	}
-
-	testCases := []testCase{
+	slashings := []*ethpb.AttesterSlashing{
 		{
-			name:           "phase0",
-			st:             statePhase0,
-			keys:           keysPhase0,
-			att1:           att1Phase0,
-			att2:           att2Phase0,
-			slashing:       slashingPhase0,
-			slashedBalance: 31750000000,
-		},
-		{
-			name:           "altair",
-			st:             stateAltair,
-			keys:           keysAltair,
-			att1:           att1Phase0,
-			att2:           att2Phase0,
-			slashing:       slashingPhase0,
-			slashedBalance: 31500000000,
-		},
-		{
-			name:           "bellatrix",
-			st:             stateBellatrix,
-			keys:           keysBellatrix,
-			att1:           att1Phase0,
-			att2:           att2Phase0,
-			slashing:       slashingPhase0,
-			slashedBalance: 31000000000,
-		},
-		{
-			name:           "capella",
-			st:             stateCapella,
-			keys:           keysCapella,
-			att1:           att1Phase0,
-			att2:           att2Phase0,
-			slashing:       slashingPhase0,
-			slashedBalance: 31000000000,
-		},
-		{
-			name:           "deneb",
-			st:             stateDeneb,
-			keys:           keysDeneb,
-			att1:           att1Phase0,
-			att2:           att2Phase0,
-			slashing:       slashingPhase0,
-			slashedBalance: 31000000000,
-		},
-		{
-			name:           "electra",
-			st:             stateElectra,
-			keys:           keysElectra,
-			att1:           att1Electra,
-			att2:           att2Electra,
-			slashing:       slashingElectra,
-			slashedBalance: 31992187500,
+			Attestation_1: att1,
+			Attestation_2: att2,
 		},
 	}

-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			for _, vv := range tc.st.Validators() {
-				vv.WithdrawableEpoch = primitives.Epoch(params.BeaconConfig().SlotsPerEpoch)
-			}
+	currentSlot := 2 * params.BeaconConfig().SlotsPerEpoch
+	require.NoError(t, beaconState.SetSlot(currentSlot))

-			domain, err := signing.Domain(tc.st.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, tc.st.GenesisValidatorsRoot())
-			require.NoError(t, err)
-			signingRoot, err := signing.ComputeSigningRoot(tc.att1.GetData(), domain)
-			assert.NoError(t, err, "Could not get signing root of beacon block header")
-			sig0 := tc.keys[0].Sign(signingRoot[:])
-			sig1 := tc.keys[1].Sign(signingRoot[:])
-			aggregateSig := bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	b := util.NewBeaconBlock()
+	b.Block = &ethpb.BeaconBlock{
+		Body: &ethpb.BeaconBlockBody{
+			AttesterSlashings: slashings,
+		},
+	}

-			if tc.att1.Version() >= version.Electra {
-				tc.att1.(*ethpb.IndexedAttestationElectra).Signature = aggregateSig.Marshal()
-			} else {
-				tc.att1.(*ethpb.IndexedAttestation).Signature = aggregateSig.Marshal()
-			}
+	ss := make([]ethpb.AttSlashing, len(b.Block.Body.AttesterSlashings))
+	for i, s := range b.Block.Body.AttesterSlashings {
+		ss[i] = s
+	}
+	newState, err := blocks.ProcessAttesterSlashings(context.Background(), beaconState, ss, v.SlashValidator)
+	require.NoError(t, err)
+	newRegistry := newState.Validators()

-			signingRoot, err = signing.ComputeSigningRoot(tc.att2.GetData(), domain)
-			assert.NoError(t, err, "Could not get signing root of beacon block header")
-			sig0 = tc.keys[0].Sign(signingRoot[:])
-			sig1 = tc.keys[1].Sign(signingRoot[:])
-			aggregateSig = bls.AggregateSignatures([]bls.Signature{sig0, sig1})
-
-			if tc.att2.Version() >= version.Electra {
-				tc.att2.(*ethpb.IndexedAttestationElectra).Signature = aggregateSig.Marshal()
-			} else {
-				tc.att2.(*ethpb.IndexedAttestation).Signature = aggregateSig.Marshal()
-			}
-
-			currentSlot := 2 * params.BeaconConfig().SlotsPerEpoch
-			require.NoError(t, tc.st.SetSlot(currentSlot))
-
-			newState, err := blocks.ProcessAttesterSlashings(context.Background(), tc.st, []ethpb.AttSlashing{tc.slashing}, v.SlashValidator)
-			require.NoError(t, err)
-			newRegistry := newState.Validators()
-
-			// Given the intersection of slashable indices is [1], only validator
-			// at index 1 should be slashed and exited. We confirm this below.
-			if newRegistry[1].ExitEpoch != tc.st.Validators()[1].ExitEpoch {
-				t.Errorf(
-					`
+	// Given the intersection of slashable indices is [1], only validator
+	// at index 1 should be slashed and exited. We confirm this below.
+	if newRegistry[1].ExitEpoch != beaconState.Validators()[1].ExitEpoch {
+		t.Errorf(
+			`
 			Expected validator at index 1's exit epoch to match
 			%d, received %d instead
 			`,
-					tc.st.Validators()[1].ExitEpoch,
-					newRegistry[1].ExitEpoch,
-				)
-			}
-
-			require.Equal(t, tc.slashedBalance, newState.Balances()[1])
-			require.Equal(t, uint64(32000000000), newState.Balances()[2])
-		})
+			beaconState.Validators()[1].ExitEpoch,
+			newRegistry[1].ExitEpoch,
+		)
 	}
+
+	require.Equal(t, uint64(31750000000), newState.Balances()[1])
+	require.Equal(t, uint64(32000000000), newState.Balances()[2])
+}
+
+func TestProcessAttesterSlashings_AppliesCorrectStatusAltair(t *testing.T) {
+	beaconState, privKeys := util.DeterministicGenesisStateAltair(t, 100)
+	for _, vv := range beaconState.Validators() {
+		vv.WithdrawableEpoch = primitives.Epoch(params.BeaconConfig().SlotsPerEpoch)
+	}
+
+	att1 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+		Data: &ethpb.AttestationData{
+			Source: &ethpb.Checkpoint{Epoch: 1},
+		},
+		AttestingIndices: []uint64{0, 1},
+	})
+	domain, err := signing.Domain(beaconState.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, beaconState.GenesisValidatorsRoot())
+	require.NoError(t, err)
+	signingRoot, err := signing.ComputeSigningRoot(att1.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 := privKeys[0].Sign(signingRoot[:])
+	sig1 := privKeys[1].Sign(signingRoot[:])
+	aggregateSig := bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att1.Signature = aggregateSig.Marshal()
+
+	att2 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+		AttestingIndices: []uint64{0, 1},
+	})
+	signingRoot, err = signing.ComputeSigningRoot(att2.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 = privKeys[0].Sign(signingRoot[:])
+	sig1 = privKeys[1].Sign(signingRoot[:])
+	aggregateSig = bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att2.Signature = aggregateSig.Marshal()
+
+	slashings := []*ethpb.AttesterSlashing{
+		{
+			Attestation_1: att1,
+			Attestation_2: att2,
+		},
+	}
+
+	currentSlot := 2 * params.BeaconConfig().SlotsPerEpoch
+	require.NoError(t, beaconState.SetSlot(currentSlot))
+
+	b := util.NewBeaconBlock()
+	b.Block = &ethpb.BeaconBlock{
+		Body: &ethpb.BeaconBlockBody{
+			AttesterSlashings: slashings,
+		},
+	}
+
+	ss := make([]ethpb.AttSlashing, len(b.Block.Body.AttesterSlashings))
+	for i, s := range b.Block.Body.AttesterSlashings {
+		ss[i] = s
+	}
+	newState, err := blocks.ProcessAttesterSlashings(context.Background(), beaconState, ss, v.SlashValidator)
+	require.NoError(t, err)
+	newRegistry := newState.Validators()
+
+	// Given the intersection of slashable indices is [1], only validator
+	// at index 1 should be slashed and exited. We confirm this below.
+	if newRegistry[1].ExitEpoch != beaconState.Validators()[1].ExitEpoch {
+		t.Errorf(
+			`
+			Expected validator at index 1's exit epoch to match
+			%d, received %d instead
+			`,
+			beaconState.Validators()[1].ExitEpoch,
+			newRegistry[1].ExitEpoch,
+		)
+	}
+
+	require.Equal(t, uint64(31500000000), newState.Balances()[1])
+	require.Equal(t, uint64(32000000000), newState.Balances()[2])
+}
+
+func TestProcessAttesterSlashings_AppliesCorrectStatusBellatrix(t *testing.T) {
+	beaconState, privKeys := util.DeterministicGenesisStateBellatrix(t, 100)
+	for _, vv := range beaconState.Validators() {
+		vv.WithdrawableEpoch = primitives.Epoch(params.BeaconConfig().SlotsPerEpoch)
+	}
+
+	att1 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+		Data: &ethpb.AttestationData{
+			Source: &ethpb.Checkpoint{Epoch: 1},
+		},
+		AttestingIndices: []uint64{0, 1},
+	})
+	domain, err := signing.Domain(beaconState.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, beaconState.GenesisValidatorsRoot())
+	require.NoError(t, err)
+	signingRoot, err := signing.ComputeSigningRoot(att1.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 := privKeys[0].Sign(signingRoot[:])
+	sig1 := privKeys[1].Sign(signingRoot[:])
+	aggregateSig := bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att1.Signature = aggregateSig.Marshal()
+
+	att2 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+		AttestingIndices: []uint64{0, 1},
+	})
+	signingRoot, err = signing.ComputeSigningRoot(att2.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 = privKeys[0].Sign(signingRoot[:])
+	sig1 = privKeys[1].Sign(signingRoot[:])
+	aggregateSig = bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att2.Signature = aggregateSig.Marshal()
+
+	slashings := []*ethpb.AttesterSlashing{
+		{
+			Attestation_1: att1,
+			Attestation_2: att2,
+		},
+	}
+
+	currentSlot := 2 * params.BeaconConfig().SlotsPerEpoch
+	require.NoError(t, beaconState.SetSlot(currentSlot))
+
+	b := util.NewBeaconBlock()
+	b.Block = &ethpb.BeaconBlock{
+		Body: &ethpb.BeaconBlockBody{
+			AttesterSlashings: slashings,
+		},
+	}
+
+	ss := make([]ethpb.AttSlashing, len(b.Block.Body.AttesterSlashings))
+	for i, s := range b.Block.Body.AttesterSlashings {
+		ss[i] = s
+	}
+	newState, err := blocks.ProcessAttesterSlashings(context.Background(), beaconState, ss, v.SlashValidator)
+	require.NoError(t, err)
+	newRegistry := newState.Validators()
+
+	// Given the intersection of slashable indices is [1], only validator
+	// at index 1 should be slashed and exited. We confirm this below.
+	if newRegistry[1].ExitEpoch != beaconState.Validators()[1].ExitEpoch {
+		t.Errorf(
+			`
+			Expected validator at index 1's exit epoch to match
+			%d, received %d instead
+			`,
+			beaconState.Validators()[1].ExitEpoch,
+			newRegistry[1].ExitEpoch,
+		)
+	}
+
+	require.Equal(t, uint64(31000000000), newState.Balances()[1])
+	require.Equal(t, uint64(32000000000), newState.Balances()[2])
+}
+
+func TestProcessAttesterSlashings_AppliesCorrectStatusCapella(t *testing.T) {
+	beaconState, privKeys := util.DeterministicGenesisStateCapella(t, 100)
+	for _, vv := range beaconState.Validators() {
+		vv.WithdrawableEpoch = primitives.Epoch(params.BeaconConfig().SlotsPerEpoch)
+	}
+
+	att1 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+		Data: &ethpb.AttestationData{
+			Source: &ethpb.Checkpoint{Epoch: 1},
+		},
+		AttestingIndices: []uint64{0, 1},
+	})
+	domain, err := signing.Domain(beaconState.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, beaconState.GenesisValidatorsRoot())
+	require.NoError(t, err)
+	signingRoot, err := signing.ComputeSigningRoot(att1.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 := privKeys[0].Sign(signingRoot[:])
+	sig1 := privKeys[1].Sign(signingRoot[:])
+	aggregateSig := bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att1.Signature = aggregateSig.Marshal()
+
+	att2 := util.HydrateIndexedAttestation(&ethpb.IndexedAttestation{
+		AttestingIndices: []uint64{0, 1},
+	})
+	signingRoot, err = signing.ComputeSigningRoot(att2.Data, domain)
+	assert.NoError(t, err, "Could not get signing root of beacon block header")
+	sig0 = privKeys[0].Sign(signingRoot[:])
+	sig1 = privKeys[1].Sign(signingRoot[:])
+	aggregateSig = bls.AggregateSignatures([]bls.Signature{sig0, sig1})
+	att2.Signature = aggregateSig.Marshal()
+
+	slashings := []*ethpb.AttesterSlashing{
+		{
+			Attestation_1: att1,
+			Attestation_2: att2,
+		},
+	}
+
+	currentSlot := 2 * params.BeaconConfig().SlotsPerEpoch
+	require.NoError(t, beaconState.SetSlot(currentSlot))
+
+	b := util.NewBeaconBlock()
+	b.Block = &ethpb.BeaconBlock{
+		Body: &ethpb.BeaconBlockBody{
+			AttesterSlashings: slashings,
+		},
+	}
+
+	ss := make([]ethpb.AttSlashing, len(b.Block.Body.AttesterSlashings))
+	for i, s := range b.Block.Body.AttesterSlashings {
+		ss[i] = s
+	}
+	newState, err := blocks.ProcessAttesterSlashings(context.Background(), beaconState, ss, v.SlashValidator)
+	require.NoError(t, err)
+	newRegistry := newState.Validators()
+
+	// Given the intersection of slashable indices is [1], only validator
+	// at index 1 should be slashed and exited. We confirm this below.
+	if newRegistry[1].ExitEpoch != beaconState.Validators()[1].ExitEpoch {
+		t.Errorf(
+			`
+			Expected validator at index 1's exit epoch to match
+			%d, received %d instead
+			`,
+			beaconState.Validators()[1].ExitEpoch,
+			newRegistry[1].ExitEpoch,
+		)
+	}
+
+	require.Equal(t, uint64(31000000000), newState.Balances()[1])
+	require.Equal(t, uint64(32000000000), newState.Balances()[2])
 }
--- a/beacon-chain/core/blocks/genesis.go
+++ b/beacon-chain/core/blocks/genesis.go
@@ -12,7 +12,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v5/encoding/ssz"
 	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 )
@@ -223,42 +222,6 @@ func NewGenesisBlockForState(ctx context.Context, st state.BeaconState) (interfa
 			},
 			Signature: params.BeaconConfig().EmptySignature[:],
 		})
-	case *ethpb.BeaconStateEPBS:
-		kzgs := make([][]byte, 0)
-		kzgRoot, err := ssz.KzgCommitmentsRoot(kzgs)
-		if err != nil {
-			return nil, err
-		}
-		return blocks.NewSignedBeaconBlock(&ethpb.SignedBeaconBlockEpbs{
-			Block: &ethpb.BeaconBlockEpbs{
-				ParentRoot: params.BeaconConfig().ZeroHash[:],
-				StateRoot:  root[:],
-				Body: &ethpb.BeaconBlockBodyEpbs{
-					RandaoReveal: make([]byte, 96),
-					Eth1Data: &ethpb.Eth1Data{
-						DepositRoot: make([]byte, 32),
-						BlockHash:   make([]byte, 32),
-					},
-					Graffiti: make([]byte, 32),
-					SyncAggregate: &ethpb.SyncAggregate{
-						SyncCommitteeBits:      make([]byte, fieldparams.SyncCommitteeLength/8),
-						SyncCommitteeSignature: make([]byte, fieldparams.BLSSignatureLength),
-					},
-					SignedExecutionPayloadHeader: &enginev1.SignedExecutionPayloadHeader{
-						Message: &enginev1.ExecutionPayloadHeaderEPBS{
-							ParentBlockHash:        make([]byte, 32),
-							ParentBlockRoot:        make([]byte, 32),
-							BlockHash:              make([]byte, 32),
-							BlobKzgCommitmentsRoot: kzgRoot[:],
-						},
-						Signature: make([]byte, 96),
-					},
-					BlsToExecutionChanges: make([]*ethpb.SignedBLSToExecutionChange, 0),
-					PayloadAttestations:   make([]*ethpb.PayloadAttestation, 0),
-				},
-			},
-			Signature: params.BeaconConfig().EmptySignature[:],
-		})
 	default:
 		return nil, ErrUnrecognizedState
 	}
--- a/beacon-chain/core/blocks/header_test.go
+++ b/beacon-chain/core/blocks/header_test.go
@@ -291,52 +291,3 @@ func TestProcessBlockHeader_OK(t *testing.T) {
 	}
 	assert.Equal(t, true, proto.Equal(nsh, expected), "Expected %v, received %v", expected, nsh)
 }
-
-func TestBlockSignatureSet_OK(t *testing.T) {
-	validators := make([]*ethpb.Validator, params.BeaconConfig().MinGenesisActiveValidatorCount)
-	for i := 0; i < len(validators); i++ {
-		validators[i] = &ethpb.Validator{
-			PublicKey:             make([]byte, 32),
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-			Slashed:               true,
-		}
-	}
-
-	state, err := util.NewBeaconState()
-	require.NoError(t, err)
-	require.NoError(t, state.SetValidators(validators))
-	require.NoError(t, state.SetSlot(10))
-	require.NoError(t, state.SetLatestBlockHeader(util.HydrateBeaconHeader(&ethpb.BeaconBlockHeader{
-		Slot:          9,
-		ProposerIndex: 0,
-	})))
-
-	latestBlockSignedRoot, err := state.LatestBlockHeader().HashTreeRoot()
-	require.NoError(t, err)
-
-	currentEpoch := time.CurrentEpoch(state)
-	priv, err := bls.RandKey()
-	require.NoError(t, err)
-	pID, err := helpers.BeaconProposerIndex(context.Background(), state)
-	require.NoError(t, err)
-	block := util.NewBeaconBlock()
-	block.Block.Slot = 10
-	block.Block.ProposerIndex = pID
-	block.Block.Body.RandaoReveal = bytesutil.PadTo([]byte{'A', 'B', 'C'}, 96)
-	block.Block.ParentRoot = latestBlockSignedRoot[:]
-	block.Signature, err = signing.ComputeDomainAndSign(state, currentEpoch, block.Block, params.BeaconConfig().DomainBeaconProposer, priv)
-	require.NoError(t, err)
-	proposerIdx, err := helpers.BeaconProposerIndex(context.Background(), state)
-	require.NoError(t, err)
-	validators[proposerIdx].Slashed = false
-	validators[proposerIdx].PublicKey = priv.PublicKey().Marshal()
-	err = state.UpdateValidatorAtIndex(proposerIdx, validators[proposerIdx])
-	require.NoError(t, err)
-	set, err := blocks.BlockSignatureBatch(state, block.Block.ProposerIndex, block.Signature, block.Block.HashTreeRoot)
-	require.NoError(t, err)
-
-	verified, err := set.Verify()
-	require.NoError(t, err)
-	assert.Equal(t, true, verified, "Block signature set returned a set which was unable to be verified")
-}
--- a/beacon-chain/core/blocks/payload.go
+++ b/beacon-chain/core/blocks/payload.go
@@ -59,9 +59,6 @@ func IsMergeTransitionComplete(st state.BeaconState) (bool, error) {
 //
 //	return block.body.execution_payload != ExecutionPayload()
 func IsExecutionBlock(body interfaces.ReadOnlyBeaconBlockBody) (bool, error) {
-	if body.Version() >= version.Capella {
-		return true, nil
-	}
 	if body == nil {
 		return false, errors.New("nil block body")
 	}
@@ -97,9 +94,6 @@ func IsExecutionEnabled(st state.BeaconState, body interfaces.ReadOnlyBeaconBloc
 	if IsPreBellatrixVersion(st.Version()) {
 		return false, nil
 	}
-	if body.Version() >= version.Capella {
-		return true, nil
-	}
 	header, err := st.LatestExecutionPayloadHeader()
 	if err != nil {
 		return false, err
@@ -250,47 +244,12 @@ func verifyBlobCommitmentCount(slot primitives.Slot, body interfaces.ReadOnlyBea
 // GetBlockPayloadHash returns the hash of the execution payload of the block
 func GetBlockPayloadHash(blk interfaces.ReadOnlyBeaconBlock) ([32]byte, error) {
 	var payloadHash [32]byte
-	if blk.Version() >= version.EPBS {
-		header, err := blk.Body().SignedExecutionPayloadHeader()
-		if err != nil {
-			return payloadHash, err
-		}
-		payload, err := header.Header()
-		if err != nil {
-			return payloadHash, err
-		}
-		return payload.BlockHash(), nil
+	if IsPreBellatrixVersion(blk.Version()) {
+		return payloadHash, nil
 	}
-	if blk.Version() >= version.Bellatrix {
-		payload, err := blk.Body().Execution()
-		if err != nil {
-			return payloadHash, err
-		}
-		return bytesutil.ToBytes32(payload.BlockHash()), nil
+	payload, err := blk.Body().Execution()
+	if err != nil {
+		return payloadHash, err
 	}
-	return payloadHash, nil
-}
-
-// GetBlockParentHash returns the hash of the parent execution payload
-func GetBlockParentHash(blk interfaces.ReadOnlyBeaconBlock) ([32]byte, error) {
-	var parentHash [32]byte
-	if blk.Version() >= version.EPBS {
-		header, err := blk.Body().SignedExecutionPayloadHeader()
-		if err != nil {
-			return parentHash, err
-		}
-		payload, err := header.Header()
-		if err != nil {
-			return parentHash, err
-		}
-		return payload.ParentBlockHash(), nil
-	}
-	if blk.Version() >= version.Bellatrix {
-		payload, err := blk.Body().Execution()
-		if err != nil {
-			return parentHash, err
-		}
-		return bytesutil.ToBytes32(payload.ParentHash()), nil
-	}
-	return parentHash, nil
+	return bytesutil.ToBytes32(payload.BlockHash()), nil
 }
--- a/beacon-chain/core/blocks/signature.go
+++ b/beacon-chain/core/blocks/signature.go
@@ -120,24 +120,6 @@ func VerifyBlockSignatureUsingCurrentFork(beaconState state.ReadOnlyBeaconState,
 	})
 }

-// BlockSignatureBatch retrieves the block signature batch from the provided block and its corresponding state.
-func BlockSignatureBatch(beaconState state.ReadOnlyBeaconState,
-	proposerIndex primitives.ValidatorIndex,
-	sig []byte,
-	rootFunc func() ([32]byte, error)) (*bls.SignatureBatch, error) {
-	currentEpoch := slots.ToEpoch(beaconState.Slot())
-	domain, err := signing.Domain(beaconState.Fork(), currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
-	if err != nil {
-		return nil, err
-	}
-	proposer, err := beaconState.ValidatorAtIndex(proposerIndex)
-	if err != nil {
-		return nil, err
-	}
-	proposerPubKey := proposer.PublicKey
-	return signing.BlockSignatureBatch(proposerPubKey, sig, domain, rootFunc)
-}
-
 // RandaoSignatureBatch retrieves the relevant randao specific signature batch object
 // from a block and its corresponding state.
 func RandaoSignatureBatch(
--- a/beacon-chain/core/blocks/withdrawals.go
+++ b/beacon-chain/core/blocks/withdrawals.go
@@ -14,8 +14,8 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
 	"github.com/prysmaticlabs/prysm/v5/crypto/hash"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/encoding/ssz"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )
@@ -118,97 +118,14 @@ func ValidateBLSToExecutionChange(st state.ReadOnlyBeaconState, signed *ethpb.Si
 	return val, nil
 }

-func checkWithdrawalsAgainstPayload(
-	executionData interfaces.ExecutionData,
-	numExpected int,
-	expectedRoot [32]byte,
-) error {
-	var wdRoot [32]byte
-	if executionData.IsBlinded() {
-		r, err := executionData.WithdrawalsRoot()
-		if err != nil {
-			return errors.Wrap(err, "could not get withdrawals root")
-		}
-		copy(wdRoot[:], r)
-	} else {
-		wds, err := executionData.Withdrawals()
-		if err != nil {
-			return errors.Wrap(err, "could not get withdrawals")
-		}
-
-		if len(wds) != numExpected {
-			return fmt.Errorf("execution payload header has %d withdrawals when %d were expected", len(wds), numExpected)
-		}
-
-		wdRoot, err = ssz.WithdrawalSliceRoot(wds, fieldparams.MaxWithdrawalsPerPayload)
-		if err != nil {
-			return errors.Wrap(err, "could not get withdrawals root")
-		}
-	}
-	if expectedRoot != wdRoot {
-		return fmt.Errorf("expected withdrawals root %#x, got %#x", expectedRoot, wdRoot)
-	}
-	return nil
-}
-
-func processWithdrawalStateTransition(
-	st state.BeaconState,
-	expectedWithdrawals []*enginev1.Withdrawal,
-	partialWithdrawalsCount uint64,
-) (err error) {
-	for _, withdrawal := range expectedWithdrawals {
-		err := helpers.DecreaseBalance(st, withdrawal.ValidatorIndex, withdrawal.Amount)
-		if err != nil {
-			return errors.Wrap(err, "could not decrease balance")
-		}
-	}
-	if st.Version() >= version.Electra {
-		if err := st.DequeuePendingPartialWithdrawals(partialWithdrawalsCount); err != nil {
-			return fmt.Errorf("unable to dequeue partial withdrawals from state: %w", err)
-		}
-	}
-
-	if len(expectedWithdrawals) > 0 {
-		if err := st.SetNextWithdrawalIndex(expectedWithdrawals[len(expectedWithdrawals)-1].Index + 1); err != nil {
-			return errors.Wrap(err, "could not set next withdrawal index")
-		}
-	}
-	var nextValidatorIndex primitives.ValidatorIndex
-	if uint64(len(expectedWithdrawals)) < params.BeaconConfig().MaxWithdrawalsPerPayload {
-		nextValidatorIndex, err = st.NextWithdrawalValidatorIndex()
-		if err != nil {
-			return errors.Wrap(err, "could not get next withdrawal validator index")
-		}
-		nextValidatorIndex += primitives.ValidatorIndex(params.BeaconConfig().MaxValidatorsPerWithdrawalsSweep)
-		nextValidatorIndex = nextValidatorIndex % primitives.ValidatorIndex(st.NumValidators())
-	} else {
-		nextValidatorIndex = expectedWithdrawals[len(expectedWithdrawals)-1].ValidatorIndex + 1
-		if nextValidatorIndex == primitives.ValidatorIndex(st.NumValidators()) {
-			nextValidatorIndex = 0
-		}
-	}
-	if err := st.SetNextWithdrawalValidatorIndex(nextValidatorIndex); err != nil {
-		return errors.Wrap(err, "could not set next withdrawal validator index")
-	}
-	return nil
-}
-
 // ProcessWithdrawals processes the validator withdrawals from the provided execution payload
 // into the beacon state.
 //
 // Spec pseudocode definition:
 //
-//	def process_withdrawals(state: BeaconState, payload: ExecutionPayload) -> None:
-//		if state.fork.current_version >= EIP7732_FORK_VERSION :
-//			if not is_parent_block_full(state): # [New in EIP-7732]
-//		 		return
+// def process_withdrawals(state: BeaconState, payload: ExecutionPayload) -> None:
 //
-//	    expected_withdrawals, partial_withdrawals_count = get_expected_withdrawals(state)  # [Modified in Electra:EIP7251]
-//
-//		if state.fork.current_version >= EIP7732_FORK_VERSION :
-//			state.latest_withdrawals_root = hash_tree_root(expected_withdrawals) # [New in EIP-7732]
-//		else :
-//	    	assert len(payload.withdrawals) == len(expected_withdrawals)
+//	expected_withdrawals, processed_partial_withdrawals_count = get_expected_withdrawals(state) # [Modified in Electra:EIP7251]
 //
 //	assert len(payload.withdrawals) == len(expected_withdrawals)
 //
@@ -235,39 +152,76 @@ func processWithdrawalStateTransition(
 //	    next_validator_index = ValidatorIndex(next_index % len(state.validators))
 //	    state.next_withdrawal_validator_index = next_validator_index
 func ProcessWithdrawals(st state.BeaconState, executionData interfaces.ExecutionData) (state.BeaconState, error) {
-	if st.Version() >= version.EPBS {
-		IsParentBlockFull, err := st.IsParentBlockFull()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not check if parent block is full")
-		}
-
-		if !IsParentBlockFull {
-			return st, nil
-		}
-	}
-
-	expectedWithdrawals, partialWithdrawalsCount, err := st.ExpectedWithdrawals()
+	expectedWithdrawals, processedPartialWithdrawalsCount, err := st.ExpectedWithdrawals()
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get expected withdrawals")
 	}

+	var wdRoot [32]byte
+	if executionData.IsBlinded() {
+		r, err := executionData.WithdrawalsRoot()
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get withdrawals root")
+		}
+		wdRoot = bytesutil.ToBytes32(r)
+	} else {
+		wds, err := executionData.Withdrawals()
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get withdrawals")
+		}
+
+		if len(wds) != len(expectedWithdrawals) {
+			return nil, fmt.Errorf("execution payload header has %d withdrawals when %d were expected", len(wds), len(expectedWithdrawals))
+		}
+
+		wdRoot, err = ssz.WithdrawalSliceRoot(wds, fieldparams.MaxWithdrawalsPerPayload)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get withdrawals root")
+		}
+	}
+
 	expectedRoot, err := ssz.WithdrawalSliceRoot(expectedWithdrawals, fieldparams.MaxWithdrawalsPerPayload)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get expected withdrawals root")
 	}
+	if expectedRoot != wdRoot {
+		return nil, fmt.Errorf("expected withdrawals root %#x, got %#x", expectedRoot, wdRoot)
+	}

-	if st.Version() >= version.EPBS {
-		err = st.SetLastWithdrawalsRoot(expectedRoot[:])
+	for _, withdrawal := range expectedWithdrawals {
+		err := helpers.DecreaseBalance(st, withdrawal.ValidatorIndex, withdrawal.Amount)
 		if err != nil {
-			return nil, errors.Wrap(err, "could not set withdrawals root")
-		}
-	} else {
-		if err := checkWithdrawalsAgainstPayload(executionData, len(expectedWithdrawals), expectedRoot); err != nil {
-			return nil, err
+			return nil, errors.Wrap(err, "could not decrease balance")
 		}
 	}
-	if err := processWithdrawalStateTransition(st, expectedWithdrawals, partialWithdrawalsCount); err != nil {
-		return nil, err
+
+	if st.Version() >= version.Electra {
+		if err := st.DequeuePendingPartialWithdrawals(processedPartialWithdrawalsCount); err != nil {
+			return nil, fmt.Errorf("unable to dequeue partial withdrawals from state: %w", err)
+		}
+	}
+
+	if len(expectedWithdrawals) > 0 {
+		if err := st.SetNextWithdrawalIndex(expectedWithdrawals[len(expectedWithdrawals)-1].Index + 1); err != nil {
+			return nil, errors.Wrap(err, "could not set next withdrawal index")
+		}
+	}
+	var nextValidatorIndex primitives.ValidatorIndex
+	if uint64(len(expectedWithdrawals)) < params.BeaconConfig().MaxWithdrawalsPerPayload {
+		nextValidatorIndex, err = st.NextWithdrawalValidatorIndex()
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get next withdrawal validator index")
+		}
+		nextValidatorIndex += primitives.ValidatorIndex(params.BeaconConfig().MaxValidatorsPerWithdrawalsSweep)
+		nextValidatorIndex = nextValidatorIndex % primitives.ValidatorIndex(st.NumValidators())
+	} else {
+		nextValidatorIndex = expectedWithdrawals[len(expectedWithdrawals)-1].ValidatorIndex + 1
+		if nextValidatorIndex == primitives.ValidatorIndex(st.NumValidators()) {
+			nextValidatorIndex = 0
+		}
+	}
+	if err := st.SetNextWithdrawalValidatorIndex(nextValidatorIndex); err != nil {
+		return nil, errors.Wrap(err, "could not set next withdrawal validator index")
 	}
 	return st, nil
 }
--- a/beacon-chain/core/blocks/withdrawals_test.go
+++ b/beacon-chain/core/blocks/withdrawals_test.go
@@ -22,7 +22,6 @@ import (
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
-	"github.com/prysmaticlabs/prysm/v5/testing/util/random"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
 )

@@ -1168,407 +1167,13 @@ func TestProcessWithdrawals(t *testing.T) {
 						checkPostState(t, test.Control, post)
 					}
 					params.BeaconConfig().MaxValidatorsPerWithdrawalsSweep = saved
+
 				})
 			}
 		})
 	}
 }

-func TestProcessWithdrawalsEPBS(t *testing.T) {
-	const (
-		currentEpoch             = primitives.Epoch(10)
-		epochInFuture            = primitives.Epoch(12)
-		epochInPast              = primitives.Epoch(8)
-		numValidators            = 128
-		notWithdrawableIndex     = 127
-		notPartiallyWithdrawable = 126
-		maxSweep                 = uint64(80)
-	)
-	maxEffectiveBalance := params.BeaconConfig().MaxEffectiveBalance
-
-	type args struct {
-		Name                            string
-		NextWithdrawalValidatorIndex    primitives.ValidatorIndex
-		NextWithdrawalIndex             uint64
-		FullWithdrawalIndices           []primitives.ValidatorIndex
-		PendingPartialWithdrawalIndices []primitives.ValidatorIndex
-		Withdrawals                     []*enginev1.Withdrawal
-		PendingPartialWithdrawals       []*ethpb.PendingPartialWithdrawal // Electra
-		LatestBlockHash                 []byte                            // EIP-7732
-	}
-	type control struct {
-		NextWithdrawalValidatorIndex primitives.ValidatorIndex
-		NextWithdrawalIndex          uint64
-		Balances                     map[uint64]uint64
-	}
-	type Test struct {
-		Args    args
-		Control control
-	}
-	executionAddress := func(i primitives.ValidatorIndex) []byte {
-		wc := make([]byte, 20)
-		wc[19] = byte(i)
-		return wc
-	}
-	withdrawalAmount := func(i primitives.ValidatorIndex) uint64 {
-		return maxEffectiveBalance + uint64(i)*100000
-	}
-	fullWithdrawal := func(i primitives.ValidatorIndex, idx uint64) *enginev1.Withdrawal {
-		return &enginev1.Withdrawal{
-			Index:          idx,
-			ValidatorIndex: i,
-			Address:        executionAddress(i),
-			Amount:         withdrawalAmount(i),
-		}
-	}
-	PendingPartialWithdrawal := func(i primitives.ValidatorIndex, idx uint64) *enginev1.Withdrawal {
-		return &enginev1.Withdrawal{
-			Index:          idx,
-			ValidatorIndex: i,
-			Address:        executionAddress(i),
-			Amount:         withdrawalAmount(i) - maxEffectiveBalance,
-		}
-	}
-	tests := []Test{
-		{
-			Args: args{
-				Name:                         "success no withdrawals",
-				NextWithdrawalValidatorIndex: 10,
-				NextWithdrawalIndex:          3,
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 90,
-				NextWithdrawalIndex:          3,
-			},
-		},
-		{
-			Args: args{
-				Name:                         "success one full withdrawal",
-				NextWithdrawalIndex:          3,
-				NextWithdrawalValidatorIndex: 5,
-				FullWithdrawalIndices:        []primitives.ValidatorIndex{70},
-				Withdrawals: []*enginev1.Withdrawal{
-					fullWithdrawal(70, 3),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 85,
-				NextWithdrawalIndex:          4,
-				Balances:                     map[uint64]uint64{70: 0},
-			},
-		},
-		{
-			Args: args{
-				Name:                            "success one partial withdrawal",
-				NextWithdrawalIndex:             21,
-				NextWithdrawalValidatorIndex:    120,
-				PendingPartialWithdrawalIndices: []primitives.ValidatorIndex{7},
-				Withdrawals: []*enginev1.Withdrawal{
-					PendingPartialWithdrawal(7, 21),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 72,
-				NextWithdrawalIndex:          22,
-				Balances:                     map[uint64]uint64{7: maxEffectiveBalance},
-			},
-		},
-		{
-			Args: args{
-				Name:                         "success many full withdrawals",
-				NextWithdrawalIndex:          22,
-				NextWithdrawalValidatorIndex: 4,
-				FullWithdrawalIndices:        []primitives.ValidatorIndex{7, 19, 28, 1},
-				Withdrawals: []*enginev1.Withdrawal{
-					fullWithdrawal(7, 22), fullWithdrawal(19, 23), fullWithdrawal(28, 24),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 84,
-				NextWithdrawalIndex:          25,
-				Balances:                     map[uint64]uint64{7: 0, 19: 0, 28: 0},
-			},
-		},
-		{
-			Args: args{
-				Name:                         "less than max sweep at end",
-				NextWithdrawalIndex:          22,
-				NextWithdrawalValidatorIndex: 4,
-				FullWithdrawalIndices:        []primitives.ValidatorIndex{80, 81, 82, 83},
-				Withdrawals: []*enginev1.Withdrawal{
-					fullWithdrawal(80, 22), fullWithdrawal(81, 23), fullWithdrawal(82, 24),
-					fullWithdrawal(83, 25),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 84,
-				NextWithdrawalIndex:          26,
-				Balances:                     map[uint64]uint64{80: 0, 81: 0, 82: 0, 83: 0},
-			},
-		},
-		{
-			Args: args{
-				Name:                         "less than max sweep and beginning",
-				NextWithdrawalIndex:          22,
-				NextWithdrawalValidatorIndex: 4,
-				FullWithdrawalIndices:        []primitives.ValidatorIndex{4, 5, 6},
-				Withdrawals: []*enginev1.Withdrawal{
-					fullWithdrawal(4, 22), fullWithdrawal(5, 23), fullWithdrawal(6, 24),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 84,
-				NextWithdrawalIndex:          25,
-				Balances:                     map[uint64]uint64{4: 0, 5: 0, 6: 0},
-			},
-		},
-		{
-			Args: args{
-				Name:                            "success many partial withdrawals",
-				NextWithdrawalIndex:             22,
-				NextWithdrawalValidatorIndex:    4,
-				PendingPartialWithdrawalIndices: []primitives.ValidatorIndex{7, 19, 28},
-				Withdrawals: []*enginev1.Withdrawal{
-					PendingPartialWithdrawal(7, 22), PendingPartialWithdrawal(19, 23), PendingPartialWithdrawal(28, 24),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 84,
-				NextWithdrawalIndex:          25,
-				Balances: map[uint64]uint64{
-					7:  maxEffectiveBalance,
-					19: maxEffectiveBalance,
-					28: maxEffectiveBalance,
-				},
-			},
-		},
-		{
-			Args: args{
-				Name:                            "success many withdrawals",
-				NextWithdrawalIndex:             22,
-				NextWithdrawalValidatorIndex:    88,
-				FullWithdrawalIndices:           []primitives.ValidatorIndex{7, 19, 28},
-				PendingPartialWithdrawalIndices: []primitives.ValidatorIndex{2, 1, 89, 15},
-				Withdrawals: []*enginev1.Withdrawal{
-					PendingPartialWithdrawal(89, 22), PendingPartialWithdrawal(1, 23), PendingPartialWithdrawal(2, 24),
-					fullWithdrawal(7, 25), PendingPartialWithdrawal(15, 26), fullWithdrawal(19, 27),
-					fullWithdrawal(28, 28),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 40,
-				NextWithdrawalIndex:          29,
-				Balances: map[uint64]uint64{
-					7: 0, 19: 0, 28: 0,
-					2: maxEffectiveBalance, 1: maxEffectiveBalance, 89: maxEffectiveBalance,
-					15: maxEffectiveBalance,
-				},
-			},
-		},
-		{
-			Args: args{
-				Name:                            "success many withdrawals with pending partial withdrawals in state",
-				NextWithdrawalIndex:             22,
-				NextWithdrawalValidatorIndex:    88,
-				FullWithdrawalIndices:           []primitives.ValidatorIndex{7, 19, 28},
-				PendingPartialWithdrawalIndices: []primitives.ValidatorIndex{2, 1, 89, 15},
-				Withdrawals: []*enginev1.Withdrawal{
-					PendingPartialWithdrawal(89, 22), PendingPartialWithdrawal(1, 23), PendingPartialWithdrawal(2, 24),
-					fullWithdrawal(7, 25), PendingPartialWithdrawal(15, 26), fullWithdrawal(19, 27),
-					fullWithdrawal(28, 28),
-				},
-				PendingPartialWithdrawals: []*ethpb.PendingPartialWithdrawal{
-					{
-						Index:  11,
-						Amount: withdrawalAmount(11) - maxEffectiveBalance,
-					},
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 40,
-				NextWithdrawalIndex:          29,
-				Balances: map[uint64]uint64{
-					7: 0, 19: 0, 28: 0,
-					2: maxEffectiveBalance, 1: maxEffectiveBalance, 89: maxEffectiveBalance,
-					15: maxEffectiveBalance,
-				},
-			},
-		},
-
-		{
-			Args: args{
-				Name:                         "success more than max fully withdrawals",
-				NextWithdrawalIndex:          22,
-				NextWithdrawalValidatorIndex: 0,
-				FullWithdrawalIndices:        []primitives.ValidatorIndex{1, 2, 3, 4, 5, 6, 7, 8, 9, 21, 22, 23, 24, 25, 26, 27, 29, 35, 89},
-				Withdrawals: []*enginev1.Withdrawal{
-					fullWithdrawal(1, 22), fullWithdrawal(2, 23), fullWithdrawal(3, 24),
-					fullWithdrawal(4, 25), fullWithdrawal(5, 26), fullWithdrawal(6, 27),
-					fullWithdrawal(7, 28), fullWithdrawal(8, 29), fullWithdrawal(9, 30),
-					fullWithdrawal(21, 31), fullWithdrawal(22, 32), fullWithdrawal(23, 33),
-					fullWithdrawal(24, 34), fullWithdrawal(25, 35), fullWithdrawal(26, 36),
-					fullWithdrawal(27, 37),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 28,
-				NextWithdrawalIndex:          38,
-				Balances: map[uint64]uint64{
-					1: 0, 2: 0, 3: 0, 4: 0, 5: 0, 6: 0, 7: 0, 8: 0, 9: 0,
-					21: 0, 22: 0, 23: 0, 24: 0, 25: 0, 26: 0, 27: 0,
-				},
-			},
-		},
-		{
-			Args: args{
-				Name:                            "success more than max partially withdrawals",
-				NextWithdrawalIndex:             22,
-				NextWithdrawalValidatorIndex:    0,
-				PendingPartialWithdrawalIndices: []primitives.ValidatorIndex{1, 2, 3, 4, 5, 6, 7, 8, 9, 21, 22, 23, 24, 25, 26, 27, 29, 35, 89},
-				Withdrawals: []*enginev1.Withdrawal{
-					PendingPartialWithdrawal(1, 22), PendingPartialWithdrawal(2, 23), PendingPartialWithdrawal(3, 24),
-					PendingPartialWithdrawal(4, 25), PendingPartialWithdrawal(5, 26), PendingPartialWithdrawal(6, 27),
-					PendingPartialWithdrawal(7, 28), PendingPartialWithdrawal(8, 29), PendingPartialWithdrawal(9, 30),
-					PendingPartialWithdrawal(21, 31), PendingPartialWithdrawal(22, 32), PendingPartialWithdrawal(23, 33),
-					PendingPartialWithdrawal(24, 34), PendingPartialWithdrawal(25, 35), PendingPartialWithdrawal(26, 36),
-					PendingPartialWithdrawal(27, 37),
-				},
-			},
-			Control: control{
-				NextWithdrawalValidatorIndex: 28,
-				NextWithdrawalIndex:          38,
-				Balances: map[uint64]uint64{
-					1:  maxEffectiveBalance,
-					2:  maxEffectiveBalance,
-					3:  maxEffectiveBalance,
-					4:  maxEffectiveBalance,
-					5:  maxEffectiveBalance,
-					6:  maxEffectiveBalance,
-					7:  maxEffectiveBalance,
-					8:  maxEffectiveBalance,
-					9:  maxEffectiveBalance,
-					21: maxEffectiveBalance,
-					22: maxEffectiveBalance,
-					23: maxEffectiveBalance,
-					24: maxEffectiveBalance,
-					25: maxEffectiveBalance,
-					26: maxEffectiveBalance,
-					27: maxEffectiveBalance,
-				},
-			},
-		},
-		{
-			Args: args{
-				Name:                         "Parent Node is not full",
-				NextWithdrawalIndex:          22,
-				NextWithdrawalValidatorIndex: 4,
-				FullWithdrawalIndices:        []primitives.ValidatorIndex{7, 19, 28, 1},
-				Withdrawals: []*enginev1.Withdrawal{
-					fullWithdrawal(7, 22), fullWithdrawal(19, 23), fullWithdrawal(28, 24),
-				},
-				LatestBlockHash: []byte{1, 2, 3},
-			},
-		},
-	}
-
-	checkPostState := func(t *testing.T, expected control, st state.BeaconState) {
-		l, err := st.NextWithdrawalValidatorIndex()
-		require.NoError(t, err)
-		require.Equal(t, expected.NextWithdrawalValidatorIndex, l)
-
-		n, err := st.NextWithdrawalIndex()
-		require.NoError(t, err)
-		require.Equal(t, expected.NextWithdrawalIndex, n)
-		balances := st.Balances()
-		for idx, bal := range expected.Balances {
-			require.Equal(t, bal, balances[idx])
-		}
-	}
-
-	prepareValidators := func(st state.BeaconState, arguments args) error {
-		validators := make([]*ethpb.Validator, numValidators)
-		if err := st.SetBalances(make([]uint64, numValidators)); err != nil {
-			return err
-		}
-		for i := range validators {
-			v := &ethpb.Validator{}
-			v.EffectiveBalance = maxEffectiveBalance
-			v.WithdrawableEpoch = epochInFuture
-			v.WithdrawalCredentials = make([]byte, 32)
-			v.WithdrawalCredentials[31] = byte(i)
-			if err := st.UpdateBalancesAtIndex(primitives.ValidatorIndex(i), v.EffectiveBalance-uint64(rand.Intn(1000))); err != nil {
-				return err
-			}
-			validators[i] = v
-		}
-		for _, idx := range arguments.FullWithdrawalIndices {
-			if idx != notWithdrawableIndex {
-				validators[idx].WithdrawableEpoch = epochInPast
-			}
-			if err := st.UpdateBalancesAtIndex(idx, withdrawalAmount(idx)); err != nil {
-				return err
-			}
-			validators[idx].WithdrawalCredentials[0] = params.BeaconConfig().ETH1AddressWithdrawalPrefixByte
-		}
-		for _, idx := range arguments.PendingPartialWithdrawalIndices {
-			validators[idx].WithdrawalCredentials[0] = params.BeaconConfig().ETH1AddressWithdrawalPrefixByte
-			if err := st.UpdateBalancesAtIndex(idx, withdrawalAmount(idx)); err != nil {
-				return err
-			}
-		}
-		return st.SetValidators(validators)
-	}
-
-	for _, test := range tests {
-		t.Run(test.Args.Name, func(t *testing.T) {
-			saved := params.BeaconConfig().MaxValidatorsPerWithdrawalsSweep
-			params.BeaconConfig().MaxValidatorsPerWithdrawalsSweep = maxSweep
-			if test.Args.Withdrawals == nil {
-				test.Args.Withdrawals = make([]*enginev1.Withdrawal, 0)
-			}
-			if test.Args.FullWithdrawalIndices == nil {
-				test.Args.FullWithdrawalIndices = make([]primitives.ValidatorIndex, 0)
-			}
-			if test.Args.PendingPartialWithdrawalIndices == nil {
-				test.Args.PendingPartialWithdrawalIndices = make([]primitives.ValidatorIndex, 0)
-			}
-			slot, err := slots.EpochStart(currentEpoch)
-			require.NoError(t, err)
-			var st state.BeaconState
-			var p interfaces.ExecutionData
-			spb := &ethpb.BeaconStateEPBS{
-				Slot:                         slot,
-				NextWithdrawalValidatorIndex: test.Args.NextWithdrawalValidatorIndex,
-				NextWithdrawalIndex:          test.Args.NextWithdrawalIndex,
-				PendingPartialWithdrawals:    test.Args.PendingPartialWithdrawals,
-				LatestExecutionPayloadHeader: &enginev1.ExecutionPayloadHeaderEPBS{
-					BlockHash: []byte{},
-				},
-				LatestBlockHash: test.Args.LatestBlockHash,
-			}
-			st, err = state_native.InitializeFromProtoUnsafeEpbs(spb)
-			require.NoError(t, err)
-			env := random.ExecutionPayloadEnvelope(t)
-			env.Payload.Withdrawals = test.Args.Withdrawals
-			wp, err := consensusblocks.WrappedROExecutionPayloadEnvelope(env)
-			require.NoError(t, err)
-			p, err = wp.Execution()
-			require.NoError(t, err)
-			err = prepareValidators(st, test.Args)
-			require.NoError(t, err)
-			post, err := blocks.ProcessWithdrawals(st, p)
-			if test.Args.Name == "Parent Node is not full" {
-				require.DeepEqual(t, post, st)
-				require.IsNil(t, err)
-			} else {
-				require.NoError(t, err)
-				checkPostState(t, test.Control, post)
-			}
-			params.BeaconConfig().MaxValidatorsPerWithdrawalsSweep = saved
-		})
-	}
-}
-
 func TestProcessBLSToExecutionChanges(t *testing.T) {
 	spb := &ethpb.BeaconStateCapella{
 		Fork: &ethpb.Fork{
--- a/beacon-chain/core/chunks/BUILD.bazel
+++ b/beacon-chain/core/chunks/BUILD.bazel
@@ -0,0 +1,17 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["signature.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/chunks",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//beacon-chain/core/signing:go_default_library",
+        "//beacon-chain/state:go_default_library",
+        "//config/params:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
+        "//consensus-types/primitives:go_default_library",
+        "//network/forks:go_default_library",
+        "//time/slots:go_default_library",
+    ],
+)
--- a/beacon-chain/core/chunks/signature.go
+++ b/beacon-chain/core/chunks/signature.go
@@ -0,0 +1,53 @@
+package chunks
+
+import (
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v5/network/forks"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
+)
+
+// VerifyChunkSignature verifies the proposer signature of a beacon block chunk.
+func VerifyChunkSignature(beaconState state.ReadOnlyBeaconState,
+	proposerIndex primitives.ValidatorIndex,
+	sig []byte,
+	rootFunc func() ([32]byte, error)) error {
+	currentEpoch := slots.ToEpoch(beaconState.Slot())
+	domain, err := signing.Domain(beaconState.Fork(), currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
+	if err != nil {
+		return err
+	}
+	proposer, err := beaconState.ValidatorAtIndex(proposerIndex)
+	if err != nil {
+		return err
+	}
+	proposerPubKey := proposer.PublicKey
+	return signing.VerifyBlockSigningRoot(proposerPubKey, sig, domain, rootFunc)
+}
+
+// VerifyChunkSignatureUsingCurrentFork verifies the proposer signature of a beacon block chunk. This differs
+// from the above method by not using fork data from the state and instead retrieving it
+// via the respective epoch.
+func VerifyChunkSignatureUsingCurrentFork(beaconState state.ReadOnlyBeaconState, chunk interfaces.ReadOnlyBeaconBlockChunk) error {
+	currentEpoch := slots.ToEpoch(chunk.Slot())
+	fork, err := forks.Fork(currentEpoch)
+	if err != nil {
+		return err
+	}
+	domain, err := signing.Domain(fork, currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
+	if err != nil {
+		return err
+	}
+	proposer, err := beaconState.ValidatorAtIndex(chunk.ProposerIndex())
+	if err != nil {
+		return err
+	}
+	proposerPubKey := proposer.PublicKey
+	sig := chunk.Signature()
+	return signing.VerifyBlockSigningRoot(proposerPubKey, sig[:], domain, func() ([32]byte, error) {
+		return chunk.HeaderRoot(), nil
+	})
+}
--- a/beacon-chain/core/electra/BUILD.bazel
+++ b/beacon-chain/core/electra/BUILD.bazel
@@ -10,6 +10,7 @@ go_library(
        "effective_balance_updates.go",
        "registry_updates.go",
        "transition.go",
+        "transition_no_verify_sig.go",
        "upgrade.go",
        "validator.go",
        "withdrawals.go",
--- a/beacon-chain/core/electra/churn_test.go
+++ b/beacon-chain/core/electra/churn_test.go
@@ -6,7 +6,6 @@ import (
 	"testing"

 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/electra"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
@@ -130,57 +129,6 @@ func TestComputeConsolidationEpochAndUpdateChurn(t *testing.T) {
 			expectedEpoch:                         16,           // Flows into another epoch.
 			expectedConsolidationBalanceToConsume: 200000000000, // 200 ETH
 		},
-		{
-			name: "balance to consume is zero, consolidation balance at limit",
-			state: func(t *testing.T) state.BeaconState {
-				activeBal := 32000000000000000 // 32M ETH
-				s, err := state_native.InitializeFromProtoUnsafeElectra(&eth.BeaconStateElectra{
-					Slot:                          slots.UnsafeEpochStart(10),
-					EarliestConsolidationEpoch:    16,
-					ConsolidationBalanceToConsume: 0,
-					Validators:                    createValidatorsWithTotalActiveBalance(primitives.Gwei(activeBal)),
-				})
-				require.NoError(t, err)
-				return s
-			}(t),
-			consolidationBalance:                  helpers.ConsolidationChurnLimit(32000000000000000),
-			expectedEpoch:                         17, // Flows into another epoch.
-			expectedConsolidationBalanceToConsume: 0,
-		},
-		{
-			name: "consolidation balance equals consolidation balance to consume",
-			state: func(t *testing.T) state.BeaconState {
-				activeBal := 32000000000000000 // 32M ETH
-				s, err := state_native.InitializeFromProtoUnsafeElectra(&eth.BeaconStateElectra{
-					Slot:                          slots.UnsafeEpochStart(10),
-					EarliestConsolidationEpoch:    16,
-					ConsolidationBalanceToConsume: helpers.ConsolidationChurnLimit(32000000000000000),
-					Validators:                    createValidatorsWithTotalActiveBalance(primitives.Gwei(activeBal)),
-				})
-				require.NoError(t, err)
-				return s
-			}(t),
-			consolidationBalance:                  helpers.ConsolidationChurnLimit(32000000000000000),
-			expectedEpoch:                         16,
-			expectedConsolidationBalanceToConsume: 0,
-		},
-		{
-			name: "consolidation balance exceeds limit by one",
-			state: func(t *testing.T) state.BeaconState {
-				activeBal := 32000000000000000 // 32M ETH
-				s, err := state_native.InitializeFromProtoUnsafeElectra(&eth.BeaconStateElectra{
-					Slot:                          slots.UnsafeEpochStart(10),
-					EarliestConsolidationEpoch:    16,
-					ConsolidationBalanceToConsume: 0,
-					Validators:                    createValidatorsWithTotalActiveBalance(primitives.Gwei(activeBal)),
-				})
-				require.NoError(t, err)
-				return s
-			}(t),
-			consolidationBalance:                  helpers.ConsolidationChurnLimit(32000000000000000)+1,
-			expectedEpoch:                         18, // Flows into another epoch.
-			expectedConsolidationBalanceToConsume: helpers.ConsolidationChurnLimit(32000000000000000)-1,
-		},
 	}

 	for _, tt := range tests {
--- a/beacon-chain/core/electra/consolidations.go
+++ b/beacon-chain/core/electra/consolidations.go
@@ -185,9 +185,6 @@ func ProcessConsolidationRequests(ctx context.Context, st state.BeaconState, req
 	pcLimit := params.BeaconConfig().PendingConsolidationsLimit

 	for _, cr := range reqs {
-		if cr == nil {
-			return errors.New("nil consolidation request")
-		}
 		if ctx.Err() != nil {
 			return fmt.Errorf("cannot process consolidation requests: %w", ctx.Err())
 		}
@@ -265,7 +262,7 @@ func ProcessConsolidationRequests(ctx context.Context, st state.BeaconState, req
 		if !helpers.IsActiveValidator(srcV, curEpoch) || !helpers.IsActiveValidatorUsingTrie(tgtV, curEpoch) {
 			continue
 		}
-		// Neither validator is exiting.
+		// Neither validator are exiting.
 		if srcV.ExitEpoch != ffe || tgtV.ExitEpoch() != ffe {
 			continue
 		}
--- a/beacon-chain/core/electra/consolidations_test.go
+++ b/beacon-chain/core/electra/consolidations_test.go
@@ -209,22 +209,7 @@ func TestProcessConsolidationRequests(t *testing.T) {
 		state    state.BeaconState
 		reqs     []*enginev1.ConsolidationRequest
 		validate func(*testing.T, state.BeaconState)
-		wantErr  bool
 	}{
-		{
-			name: "nil request",
-			state: func() state.BeaconState {
-				st := &eth.BeaconStateElectra{}
-				s, err := state_native.InitializeFromProtoElectra(st)
-				require.NoError(t, err)
-				return s
-			}(),
-			reqs: []*enginev1.ConsolidationRequest{nil},
-			validate: func(t *testing.T, st state.BeaconState) {
-				require.DeepEqual(t, st, st)
-			},
-			wantErr: true,
-		},
 		{
 			name: "one valid request",
 			state: func() state.BeaconState {
@@ -420,13 +405,7 @@ func TestProcessConsolidationRequests(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			err := electra.ProcessConsolidationRequests(context.TODO(), tt.state, tt.reqs)
-			if (err != nil) != tt.wantErr {
-				t.Errorf("ProcessWithdrawalRequests() error = %v, wantErr %v", err, tt.wantErr)
-				return
-			}
-			if !tt.wantErr {
-				require.NoError(t, err)
-			}
+			require.NoError(t, err)
 			if tt.validate != nil {
 				tt.validate(t, tt.state)
 			}
--- a/beacon-chain/core/electra/deposits.go
+++ b/beacon-chain/core/electra/deposits.go
@@ -385,8 +385,14 @@ func batchProcessNewPendingDeposits(ctx context.Context, state state.BeaconState
 		return errors.Wrap(err, "batch signature verification failed")
 	}

+	pubKeyMap := make(map[[48]byte]struct{}, len(pendingDeposits))
+
 	// Process each deposit individually
 	for _, pendingDeposit := range pendingDeposits {
+		_, found := pubKeyMap[bytesutil.ToBytes48(pendingDeposit.PublicKey)]
+		if !found {
+			pubKeyMap[bytesutil.ToBytes48(pendingDeposit.PublicKey)] = struct{}{}
+		}
 		validSignature := allSignaturesVerified

 		// If batch verification failed, check the individual deposit signature
@@ -404,8 +410,7 @@ func batchProcessNewPendingDeposits(ctx context.Context, state state.BeaconState

 		// Add validator to the registry if the signature is valid
 		if validSignature {
-			_, has := state.ValidatorIndexByPubkey(bytesutil.ToBytes48(pendingDeposit.PublicKey))
-			if has {
+			if found {
 				index, _ := state.ValidatorIndexByPubkey(bytesutil.ToBytes48(pendingDeposit.PublicKey))
 				if err := helpers.IncreaseBalance(state, index, pendingDeposit.Amount); err != nil {
 					return errors.Wrap(err, "could not increase balance")
@@ -587,10 +592,10 @@ func processDepositRequest(beaconState state.BeaconState, request *enginev1.Depo
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get deposit requests start index")
 	}
-	if request == nil {
-		return nil, errors.New("nil deposit request")
-	}
 	if requestsStartIndex == params.BeaconConfig().UnsetDepositRequestsStartIndex {
+		if request == nil {
+			return nil, errors.New("nil deposit request")
+		}
 		if err := beaconState.SetDepositRequestsStartIndex(request.Index); err != nil {
 			return nil, errors.Wrap(err, "could not set deposit requests start index")
 		}
--- a/beacon-chain/core/electra/deposits_test.go
+++ b/beacon-chain/core/electra/deposits_test.go
@@ -333,7 +333,6 @@ func TestProcessDepositRequests(t *testing.T) {
 	st, _ := util.DeterministicGenesisStateElectra(t, 1)
 	sk, err := bls.RandKey()
 	require.NoError(t, err)
-	require.NoError(t, st.SetDepositRequestsStartIndex(1))

 	t.Run("empty requests continues", func(t *testing.T) {
 		newSt, err := electra.ProcessDepositRequests(context.Background(), st, []*enginev1.DepositRequest{})
--- a/beacon-chain/core/electra/transition_no_verify_sig.go
+++ b/beacon-chain/core/electra/transition_no_verify_sig.go
@@ -1,4 +1,4 @@
-package epbs
+package electra

 import (
 	"context"
@@ -6,11 +6,9 @@ import (

 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/electra"
 	v "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/validators"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )

 var (
@@ -64,11 +62,11 @@ func ProcessOperations(
 	if err != nil {
 		return nil, errors.Wrap(err, "could not process altair attester slashing")
 	}
-	st, err = electra.ProcessAttestationsNoVerifySignature(ctx, st, block)
+	st, err = ProcessAttestationsNoVerifySignature(ctx, st, block)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not process altair attestation")
 	}
-	if _, err := electra.ProcessDeposits(ctx, st, bb.Deposits()); err != nil { // new in electra
+	if _, err := ProcessDeposits(ctx, st, bb.Deposits()); err != nil { // new in electra
 		return nil, errors.Wrap(err, "could not process altair deposit")
 	}
 	st, err = ProcessVoluntaryExits(ctx, st, bb.VoluntaryExits())
@@ -79,27 +77,20 @@ func ProcessOperations(
 	if err != nil {
 		return nil, errors.Wrap(err, "could not process bls-to-execution changes")
 	}
-	// new in ePBS
-	if block.Version() >= version.EPBS {
-		if err := ProcessPayloadAttestations(st, bb); err != nil {
-			return nil, err
-		}
-		return st, nil
-	}
 	// new in electra
 	requests, err := bb.ExecutionRequests()
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get execution requests")
 	}
-	st, err = electra.ProcessDepositRequests(ctx, st, requests.Deposits)
+	st, err = ProcessDepositRequests(ctx, st, requests.Deposits)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not process deposit requests")
 	}
-	st, err = electra.ProcessWithdrawalRequests(ctx, st, requests.Withdrawals)
+	st, err = ProcessWithdrawalRequests(ctx, st, requests.Withdrawals)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not process withdrawal requests")
 	}
-	if err := electra.ProcessConsolidationRequests(ctx, st, requests.Consolidations); err != nil {
+	if err := ProcessConsolidationRequests(ctx, st, requests.Consolidations); err != nil {
 		return nil, fmt.Errorf("could not process consolidation requests: %w", err)
 	}
 	return st, nil
--- a/beacon-chain/core/electra/withdrawals_test.go
+++ b/beacon-chain/core/electra/withdrawals_test.go
@@ -38,17 +38,6 @@ func TestProcessWithdrawRequests(t *testing.T) {
 		wantFn  func(t *testing.T, got state.BeaconState)
 		wantErr bool
 	}{
-		{
-			name: "nil request",
-			args: args{
-				st:  func() state.BeaconState { return st }(),
-				wrs: []*enginev1.WithdrawalRequest{nil},
-			},
-			wantErr: true,
-			wantFn: func(t *testing.T, got state.BeaconState) {
-				require.DeepEqual(t, got, nil)
-			},
-		},
 		{
 			name: "happy path exit and withdrawal only",
 			args: args{
--- a/beacon-chain/core/epbs/BUILD.bazel
+++ b/beacon-chain/core/epbs/BUILD.bazel
@@ -1,61 +0,0 @@
-load("@prysm//tools/go:def.bzl", "go_library", "go_test")
-
-go_library(
-    name = "go_default_library",
-    srcs = [
-        "attestation.go",
-        "execution_payload_envelope.go",
-        "execution_payload_header.go",
-        "operations.go",
-        "payload_attestation.go",
-        "upgrade.go",
-    ],
-    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs",
-    visibility = ["//visibility:public"],
-    deps = [
-        "//beacon-chain/core/altair:go_default_library",
-        "//beacon-chain/core/blocks:go_default_library",
-        "//beacon-chain/core/electra:go_default_library",
-        "//beacon-chain/core/helpers:go_default_library",
-        "//beacon-chain/core/signing:go_default_library",
-        "//beacon-chain/core/time:go_default_library",
-        "//beacon-chain/core/validators:go_default_library",
-        "//beacon-chain/state:go_default_library",
-        "//beacon-chain/state/state-native:go_default_library",
-        "//config/params:go_default_library",
-        "//consensus-types/interfaces:go_default_library",
-        "//consensus-types/primitives:go_default_library",
-        "//crypto/bls:go_default_library",
-        "//network/forks:go_default_library",
-        "//proto/engine/v1:go_default_library",
-        "//proto/prysm/v1alpha1:go_default_library",
-        "//runtime/version:go_default_library",
-        "//time/slots:go_default_library",
-        "@com_github_pkg_errors//:go_default_library",
-    ],
-)
-
-go_test(
-    name = "go_default_test",
-    srcs = [
-        "attestation_test.go",
-        "execution_payload_envelope_test.go",
-        "upgrade_test.go",
-    ],
-    deps = [
-        ":go_default_library",
-        "//beacon-chain/core/altair:go_default_library",
-        "//beacon-chain/core/helpers:go_default_library",
-        "//beacon-chain/core/time:go_default_library",
-        "//beacon-chain/state/state-native:go_default_library",
-        "//config/params:go_default_library",
-        "//consensus-types/blocks:go_default_library",
-        "//consensus-types/primitives:go_default_library",
-        "//proto/engine/v1:go_default_library",
-        "//proto/prysm/v1alpha1:go_default_library",
-        "//testing/require:go_default_library",
-        "//testing/util:go_default_library",
-        "//testing/util/random:go_default_library",
-        "//time/slots:go_default_library",
-    ],
-)
--- a/beacon-chain/core/epbs/attestation.go
+++ b/beacon-chain/core/epbs/attestation.go
@@ -1,13 +0,0 @@
-package epbs
-
-import (
-	"fmt"
-)
-
-// RemoveValidatorFlag removes validator flag from existing one.
-func RemoveValidatorFlag(flag, flagPosition uint8) (uint8, error) {
-	if flagPosition > 7 {
-		return flag, fmt.Errorf("flag position %d exceeds length", flagPosition)
-	}
-	return flag & ^(1 << flagPosition), nil
-}
--- a/beacon-chain/core/epbs/attestation_test.go
+++ b/beacon-chain/core/epbs/attestation_test.go
@@ -1,93 +0,0 @@
-package epbs_test
-
-import (
-	"testing"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/altair"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-)
-
-func TestValidatorFlag_Remove(t *testing.T) {
-	tests := []struct {
-		name          string
-		add           []uint8
-		remove        []uint8
-		expectedTrue  []uint8
-		expectedFalse []uint8
-	}{
-		{
-			name:          "none",
-			add:           []uint8{},
-			remove:        []uint8{},
-			expectedTrue:  []uint8{},
-			expectedFalse: []uint8{params.BeaconConfig().TimelySourceFlagIndex, params.BeaconConfig().TimelyTargetFlagIndex, params.BeaconConfig().TimelyHeadFlagIndex},
-		},
-		{
-			name:          "source",
-			add:           []uint8{params.BeaconConfig().TimelySourceFlagIndex},
-			remove:        []uint8{params.BeaconConfig().TimelySourceFlagIndex},
-			expectedTrue:  []uint8{},
-			expectedFalse: []uint8{params.BeaconConfig().TimelySourceFlagIndex, params.BeaconConfig().TimelyTargetFlagIndex, params.BeaconConfig().TimelyHeadFlagIndex},
-		},
-		{
-			name:          "source, target",
-			add:           []uint8{params.BeaconConfig().TimelySourceFlagIndex, params.BeaconConfig().TimelyTargetFlagIndex},
-			remove:        []uint8{params.BeaconConfig().TimelySourceFlagIndex},
-			expectedTrue:  []uint8{params.BeaconConfig().TimelyTargetFlagIndex},
-			expectedFalse: []uint8{params.BeaconConfig().TimelySourceFlagIndex, params.BeaconConfig().TimelyHeadFlagIndex},
-		},
-		{
-			name:          "source, target, head",
-			add:           []uint8{params.BeaconConfig().TimelySourceFlagIndex, params.BeaconConfig().TimelyTargetFlagIndex, params.BeaconConfig().TimelyHeadFlagIndex},
-			remove:        []uint8{params.BeaconConfig().TimelyTargetFlagIndex, params.BeaconConfig().TimelyHeadFlagIndex},
-			expectedTrue:  []uint8{params.BeaconConfig().TimelySourceFlagIndex},
-			expectedFalse: []uint8{params.BeaconConfig().TimelyTargetFlagIndex, params.BeaconConfig().TimelyHeadFlagIndex},
-		},
-	}
-	var err error
-	for _, test := range tests {
-		t.Run(test.name, func(t *testing.T) {
-			flag := uint8(0)
-
-			// Add flags.
-			for _, flagPosition := range test.add {
-				flag, err = altair.AddValidatorFlag(flag, flagPosition)
-				require.NoError(t, err)
-
-				has, err := altair.HasValidatorFlag(flag, flagPosition)
-				require.NoError(t, err)
-				require.Equal(t, true, has)
-			}
-
-			// Remove flags.
-			for _, flagPosition := range test.remove {
-				flag, err = epbs.RemoveValidatorFlag(flag, flagPosition)
-				require.NoError(t, err)
-			}
-
-			// Check if flags are set correctly.
-			for _, flagPosition := range test.expectedTrue {
-				has, err := altair.HasValidatorFlag(flag, flagPosition)
-				require.NoError(t, err)
-				require.Equal(t, true, has)
-			}
-			for _, flagPosition := range test.expectedFalse {
-				has, err := altair.HasValidatorFlag(flag, flagPosition)
-				require.NoError(t, err)
-				require.Equal(t, false, has)
-			}
-		})
-	}
-}
-
-func TestValidatorFlag_Remove_ExceedsLength(t *testing.T) {
-	_, err := epbs.RemoveValidatorFlag(0, 8)
-	require.ErrorContains(t, "flag position 8 exceeds length", err)
-}
-
-func TestValidatorFlag_Remove_NotSet(t *testing.T) {
-	_, err := epbs.RemoveValidatorFlag(0, 1)
-	require.NoError(t, err)
-}
--- a/beacon-chain/core/epbs/execution_payload_envelope.go
+++ b/beacon-chain/core/epbs/execution_payload_envelope.go
@@ -1,126 +0,0 @@
-package epbs
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/electra"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-)
-
-// ValidatePayloadStateTransition performs the process_execution_payload
-// function.
-func ValidatePayloadStateTransition(
-	ctx context.Context,
-	preState state.BeaconState,
-	envelope interfaces.ROExecutionPayloadEnvelope,
-) error {
-	if err := UpdateHeaderAndVerify(ctx, preState, envelope); err != nil {
-		return err
-	}
-	committedHeader, err := preState.LatestExecutionPayloadHeaderEPBS()
-	if err != nil {
-		return err
-	}
-	if err := ValidateAgainstCommittedBid(committedHeader, envelope); err != nil {
-		return err
-	}
-	if err := ProcessPayloadStateTransition(ctx, preState, envelope); err != nil {
-		return err
-	}
-	return CheckPostStateRoot(ctx, preState, envelope)
-}
-
-func ProcessPayloadStateTransition(
-	ctx context.Context,
-	preState state.BeaconState,
-	envelope interfaces.ROExecutionPayloadEnvelope,
-) error {
-	er := envelope.ExecutionRequests()
-	preState, err := electra.ProcessDepositRequests(ctx, preState, er.Deposits)
-	if err != nil {
-		return errors.Wrap(err, "could not process deposit receipts")
-	}
-	preState, err = electra.ProcessWithdrawalRequests(ctx, preState, er.Withdrawals)
-	if err != nil {
-		return errors.Wrap(err, "could not process ercution layer withdrawal requests")
-	}
-	if err := electra.ProcessConsolidationRequests(ctx, preState, er.Consolidations); err != nil {
-		return errors.Wrap(err, "could not process consolidation requests")
-	}
-	payload, err := envelope.Execution()
-	if err != nil {
-		return errors.Wrap(err, "could not get execution payload")
-	}
-	if err := preState.SetLatestBlockHash(payload.BlockHash()); err != nil {
-		return err
-	}
-	return preState.SetLatestFullSlot(preState.Slot())
-}
-
-func UpdateHeaderAndVerify(
-	ctx context.Context,
-	preState state.BeaconState,
-	envelope interfaces.ROExecutionPayloadEnvelope,
-) error {
-	blockHeader := preState.LatestBlockHeader()
-	if blockHeader == nil {
-		return errors.New("invalid nil latest block header")
-	}
-	if len(blockHeader.StateRoot) == 0 || [32]byte(blockHeader.StateRoot) == [32]byte{} {
-		prevStateRoot, err := preState.HashTreeRoot(ctx)
-		if err != nil {
-			return errors.Wrap(err, "could not compute previous state root")
-		}
-		blockHeader.StateRoot = prevStateRoot[:]
-		if err := preState.SetLatestBlockHeader(blockHeader); err != nil {
-			return errors.Wrap(err, "could not set latest block header")
-		}
-	}
-	blockHeaderRoot, err := blockHeader.HashTreeRoot()
-	if err != nil {
-		return err
-	}
-	beaconBlockRoot := envelope.BeaconBlockRoot()
-	if blockHeaderRoot != beaconBlockRoot {
-		return fmt.Errorf("beacon block root does not match previous header, got: %#x wanted: %#x", beaconBlockRoot, blockHeaderRoot)
-	}
-	return nil
-}
-
-func ValidateAgainstCommittedBid(
-	committedHeader *enginev1.ExecutionPayloadHeaderEPBS,
-	envelope interfaces.ROExecutionPayloadEnvelope,
-) error {
-	builderIndex := envelope.BuilderIndex()
-	if committedHeader.BuilderIndex != builderIndex {
-		return errors.New("builder index does not match committed header")
-	}
-	kzgRoot, err := envelope.BlobKzgCommitmentsRoot()
-	if err != nil {
-		return err
-	}
-	if [32]byte(committedHeader.BlobKzgCommitmentsRoot) != kzgRoot {
-		return errors.New("blob KZG commitments root does not match committed header")
-	}
-	return nil
-}
-
-func CheckPostStateRoot(
-	ctx context.Context,
-	preState state.BeaconState,
-	envelope interfaces.ROExecutionPayloadEnvelope,
-) error {
-	stateRoot, err := preState.HashTreeRoot(ctx)
-	if err != nil {
-		return err
-	}
-	envelopeStateRoot := envelope.StateRoot()
-	if stateRoot != envelopeStateRoot {
-		return errors.New("state root mismatch")
-	}
-	return nil
-}
--- a/beacon-chain/core/epbs/execution_payload_envelope_test.go
+++ b/beacon-chain/core/epbs/execution_payload_envelope_test.go
@@ -1,110 +0,0 @@
-package epbs_test
-
-import (
-	"context"
-	"testing"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
-	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-	"github.com/prysmaticlabs/prysm/v5/testing/util"
-	"github.com/prysmaticlabs/prysm/v5/testing/util/random"
-)
-
-func TestProcessPayloadStateTransition(t *testing.T) {
-	bh := [32]byte{'h'}
-	p := random.ExecutionPayloadEnvelope(t)
-	p.Payload.BlockHash = bh[:]
-	p.ExecutionRequests = &enginev1.ExecutionRequests{}
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-	validators := make([]*ethpb.Validator, 0)
-	stpb := &ethpb.BeaconStateEPBS{Slot: 3, Validators: validators}
-	st, err := state_native.InitializeFromProtoUnsafeEpbs(stpb)
-	require.NoError(t, err)
-	ctx := context.Background()
-
-	lbh, err := st.LatestBlockHash()
-	require.NoError(t, err)
-	require.Equal(t, [32]byte{}, [32]byte(lbh))
-
-	require.NoError(t, epbs.ProcessPayloadStateTransition(ctx, st, e))
-
-	lbh, err = st.LatestBlockHash()
-	require.NoError(t, err)
-	require.Equal(t, bh, [32]byte(lbh))
-
-	lfs, err := st.LatestFullSlot()
-	require.NoError(t, err)
-	require.Equal(t, lfs, st.Slot())
-}
-
-func Test_validateAgainstHeader(t *testing.T) {
-	bh := [32]byte{'h'}
-	payload := &enginev1.ExecutionPayloadDeneb{BlockHash: bh[:]}
-	p := random.ExecutionPayloadEnvelope(t)
-	p.Payload = payload
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-	stpb := &ethpb.BeaconStateEPBS{Slot: 3}
-	st, err := state_native.InitializeFromProtoUnsafeEpbs(stpb)
-	require.NoError(t, err)
-	ctx := context.Background()
-	require.ErrorContains(t, "invalid nil latest block header", epbs.UpdateHeaderAndVerify(ctx, st, e))
-
-	prest, _ := util.DeterministicGenesisStateEpbs(t, 64)
-	br := [32]byte{'r'}
-	p.BeaconBlockRoot = br[:]
-	require.ErrorContains(t, "beacon block root does not match previous header", epbs.UpdateHeaderAndVerify(ctx, prest, e))
-
-	header := prest.LatestBlockHeader()
-	require.NoError(t, err)
-	headerRoot, err := header.HashTreeRoot()
-	require.NoError(t, err)
-	p.BeaconBlockRoot = headerRoot[:]
-	require.NoError(t, epbs.UpdateHeaderAndVerify(ctx, prest, e))
-}
-
-func Test_validateAgainstCommittedBid(t *testing.T) {
-	payload := &enginev1.ExecutionPayloadDeneb{}
-	p := random.ExecutionPayloadEnvelope(t)
-	p.Payload = payload
-	p.BuilderIndex = 1
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-	h := &enginev1.ExecutionPayloadHeaderEPBS{}
-	require.ErrorContains(t, "builder index does not match committed header", epbs.ValidateAgainstCommittedBid(h, e))
-
-	h.BuilderIndex = 1
-	p.BlobKzgCommitments = make([][]byte, 6)
-	for i := range p.BlobKzgCommitments {
-		p.BlobKzgCommitments[i] = make([]byte, 48)
-	}
-	h.BlobKzgCommitmentsRoot = make([]byte, 32)
-	require.ErrorContains(t, "blob KZG commitments root does not match committed header", epbs.ValidateAgainstCommittedBid(h, e))
-
-	root, err := e.BlobKzgCommitmentsRoot()
-	require.NoError(t, err)
-	h.BlobKzgCommitmentsRoot = root[:]
-	require.NoError(t, epbs.ValidateAgainstCommittedBid(h, e))
-}
-
-func TestCheckPostStateRoot(t *testing.T) {
-	payload := &enginev1.ExecutionPayloadDeneb{}
-	p := random.ExecutionPayloadEnvelope(t)
-	p.Payload = payload
-	p.BuilderIndex = 1
-	e, err := blocks.WrappedROExecutionPayloadEnvelope(p)
-	require.NoError(t, err)
-	ctx := context.Background()
-	st, _ := util.DeterministicGenesisStateEpbs(t, 64)
-	p.BeaconStateRoot = make([]byte, 32)
-	require.ErrorContains(t, "state root mismatch", epbs.CheckPostStateRoot(ctx, st, e))
-	root, err := st.HashTreeRoot(ctx)
-	require.NoError(t, err)
-	p.BeaconStateRoot = root[:]
-	require.NoError(t, epbs.CheckPostStateRoot(ctx, st, e))
-}
--- a/beacon-chain/core/epbs/execution_payload_header.go
+++ b/beacon-chain/core/epbs/execution_payload_header.go
@@ -1,50 +0,0 @@
-package epbs
-
-import (
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v5/network/forks"
-	"github.com/prysmaticlabs/prysm/v5/time/slots"
-)
-
-// ValidatePayloadHeaderSignature validates the signature of the execution payload header.
-func ValidatePayloadHeaderSignature(st state.ReadOnlyBeaconState, sh interfaces.ROSignedExecutionPayloadHeader) error {
-	h, err := sh.Header()
-	if err != nil {
-		return err
-	}
-	pubkey := st.PubkeyAtIndex(h.BuilderIndex())
-	pub, err := bls.PublicKeyFromBytes(pubkey[:])
-	if err != nil {
-		return err
-	}
-
-	s := sh.Signature()
-	sig, err := bls.SignatureFromBytes(s[:])
-	if err != nil {
-		return err
-	}
-
-	currentEpoch := slots.ToEpoch(h.Slot())
-	f, err := forks.Fork(currentEpoch)
-	if err != nil {
-		return err
-	}
-
-	domain, err := signing.Domain(f, currentEpoch, params.BeaconConfig().DomainBeaconBuilder, st.GenesisValidatorsRoot())
-	if err != nil {
-		return err
-	}
-	root, err := sh.SigningRoot(domain)
-	if err != nil {
-		return err
-	}
-	if !sig.Verify(pub, root[:]) {
-		return signing.ErrSigFailedToVerify
-	}
-
-	return nil
-}
--- a/beacon-chain/core/epbs/payload_attestation.go
+++ b/beacon-chain/core/epbs/payload_attestation.go
@@ -1,125 +0,0 @@
-package epbs
-
-import (
-	"bytes"
-	"context"
-	"time"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/altair"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-)
-
-func ProcessPayloadAttestations(state state.BeaconState, body interfaces.ReadOnlyBeaconBlockBody) error {
-	atts, err := body.PayloadAttestations()
-	if err != nil {
-		return err
-	}
-	if len(atts) == 0 {
-		return nil
-	}
-
-	ctx, cancel := context.WithTimeout(context.Background(), 12*time.Second)
-	defer cancel()
-	lbh := state.LatestBlockHeader()
-	proposerIndex := lbh.ProposerIndex
-	var participation []byte
-	if state.Slot()%32 == 0 {
-		participation, err = state.PreviousEpochParticipation()
-	} else {
-		participation, err = state.CurrentEpochParticipation()
-	}
-	if err != nil {
-		return err
-	}
-	totalBalance, err := helpers.TotalActiveBalance(state)
-	if err != nil {
-		return err
-	}
-	baseReward, err := altair.BaseRewardWithTotalBalance(state, proposerIndex, totalBalance)
-	if err != nil {
-		return err
-	}
-	lfs, err := state.LatestFullSlot()
-	if err != nil {
-		return err
-	}
-
-	cfg := params.BeaconConfig()
-	sourceFlagIndex := cfg.TimelySourceFlagIndex
-	targetFlagIndex := cfg.TimelyTargetFlagIndex
-	headFlagIndex := cfg.TimelyHeadFlagIndex
-	penaltyNumerator := uint64(0)
-	rewardNumerator := uint64(0)
-	rewardDenominator := (cfg.WeightDenominator - cfg.ProposerWeight) * cfg.WeightDenominator / cfg.ProposerWeight
-
-	for _, att := range atts {
-		data := att.Data
-		if !bytes.Equal(data.BeaconBlockRoot, lbh.ParentRoot) {
-			return errors.New("invalid beacon block root in payload attestation data")
-		}
-		if data.Slot+1 != state.Slot() {
-			return errors.New("invalid data slot")
-		}
-		indexed, err := helpers.GetIndexedPayloadAttestation(ctx, state, data.Slot, att)
-		if err != nil {
-			return err
-		}
-		valid, err := helpers.IsValidIndexedPayloadAttestation(state, indexed)
-		if err != nil {
-			return err
-		}
-		if !valid {
-			return errors.New("invalid payload attestation")
-		}
-		payloadWasPreset := data.Slot == lfs
-		votedPresent := primitives.PTCStatus(data.PayloadStatus[0]) == primitives.PAYLOAD_PRESENT
-		if votedPresent != payloadWasPreset {
-			for _, idx := range indexed.GetAttestingIndices() {
-				flags := participation[idx]
-				has, err := altair.HasValidatorFlag(flags, targetFlagIndex)
-				if err != nil {
-					return err
-				}
-				if has {
-					penaltyNumerator += baseReward * cfg.TimelyTargetWeight
-				}
-				has, err = altair.HasValidatorFlag(flags, sourceFlagIndex)
-				if err != nil {
-					return err
-				}
-				if has {
-					penaltyNumerator += baseReward * cfg.TimelySourceWeight
-				}
-				has, err = altair.HasValidatorFlag(flags, headFlagIndex)
-				if err != nil {
-					return err
-				}
-				if has {
-					penaltyNumerator += baseReward * cfg.TimelyHeadWeight
-				}
-				participation[idx] = 0
-			}
-		} else {
-			for _, idx := range indexed.GetAttestingIndices() {
-				participation[idx] = (1 << headFlagIndex) | (1 << sourceFlagIndex) | (1 << targetFlagIndex)
-				rewardNumerator += baseReward * (cfg.TimelyHeadWeight + cfg.TimelySourceWeight + cfg.TimelyTargetWeight)
-			}
-		}
-	}
-	if penaltyNumerator > 0 {
-		if err := helpers.DecreaseBalance(state, proposerIndex, penaltyNumerator/rewardDenominator); err != nil {
-			return err
-		}
-	}
-	if rewardNumerator > 0 {
-		if err := helpers.IncreaseBalance(state, proposerIndex, penaltyNumerator/rewardDenominator); err != nil {
-			return err
-		}
-	}
-	return nil
-}
--- a/beacon-chain/core/epbs/upgrade.go
+++ b/beacon-chain/core/epbs/upgrade.go
@@ -1,150 +0,0 @@
-package epbs
-
-import (
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-)
-
-// UpgradeToEIP7732 updates inputs a generic state to return the version EIP-7732 state.
-// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7732/fork.md
-func UpgradeToEIP7732(beaconState state.BeaconState) (state.BeaconState, error) {
-	currentSyncCommittee, err := beaconState.CurrentSyncCommittee()
-	if err != nil {
-		return nil, err
-	}
-	nextSyncCommittee, err := beaconState.NextSyncCommittee()
-	if err != nil {
-		return nil, err
-	}
-	prevEpochParticipation, err := beaconState.PreviousEpochParticipation()
-	if err != nil {
-		return nil, err
-	}
-	currentEpochParticipation, err := beaconState.CurrentEpochParticipation()
-	if err != nil {
-		return nil, err
-	}
-	inactivityScores, err := beaconState.InactivityScores()
-	if err != nil {
-		return nil, err
-	}
-	payloadHeader, err := beaconState.LatestExecutionPayloadHeader()
-	if err != nil {
-		return nil, err
-	}
-	wi, err := beaconState.NextWithdrawalIndex()
-	if err != nil {
-		return nil, err
-	}
-	vi, err := beaconState.NextWithdrawalValidatorIndex()
-	if err != nil {
-		return nil, err
-	}
-	summaries, err := beaconState.HistoricalSummaries()
-	if err != nil {
-		return nil, err
-	}
-	historicalRoots, err := beaconState.HistoricalRoots()
-	if err != nil {
-		return nil, err
-	}
-	depositBalanceToConsume, err := beaconState.DepositBalanceToConsume()
-	if err != nil {
-		return nil, err
-	}
-	exitBalanceToConsume, err := beaconState.ExitBalanceToConsume()
-	if err != nil {
-		return nil, err
-	}
-	earliestExitEpoch, err := beaconState.EarliestExitEpoch()
-	if err != nil {
-		return nil, err
-	}
-	consolidationBalanceToConsume, err := beaconState.ConsolidationBalanceToConsume()
-	if err != nil {
-		return nil, err
-	}
-	earliestConsolidationEpoch, err := beaconState.EarliestConsolidationEpoch()
-	if err != nil {
-		return nil, err
-	}
-	pendingDeposits, err := beaconState.PendingDeposits()
-	if err != nil {
-		return nil, err
-	}
-	pendingPartialWithdrawals, err := beaconState.PendingPartialWithdrawals()
-	if err != nil {
-		return nil, err
-	}
-	pendingConsolidations, err := beaconState.PendingConsolidations()
-	if err != nil {
-		return nil, err
-	}
-
-	s := &ethpb.BeaconStateEPBS{
-		GenesisTime:           beaconState.GenesisTime(),
-		GenesisValidatorsRoot: beaconState.GenesisValidatorsRoot(),
-		Slot:                  beaconState.Slot(),
-		Fork: &ethpb.Fork{
-			PreviousVersion: beaconState.Fork().CurrentVersion,
-			CurrentVersion:  params.BeaconConfig().EPBSForkVersion,
-			Epoch:           time.CurrentEpoch(beaconState),
-		},
-		LatestBlockHeader:            beaconState.LatestBlockHeader(),
-		BlockRoots:                   beaconState.BlockRoots(),
-		StateRoots:                   beaconState.StateRoots(),
-		HistoricalRoots:              historicalRoots,
-		Eth1Data:                     beaconState.Eth1Data(),
-		Eth1DataVotes:                beaconState.Eth1DataVotes(),
-		Eth1DepositIndex:             beaconState.Eth1DepositIndex(),
-		Validators:                   beaconState.Validators(),
-		Balances:                     beaconState.Balances(),
-		RandaoMixes:                  beaconState.RandaoMixes(),
-		Slashings:                    beaconState.Slashings(),
-		PreviousEpochParticipation:   prevEpochParticipation,
-		CurrentEpochParticipation:    currentEpochParticipation,
-		JustificationBits:            beaconState.JustificationBits(),
-		PreviousJustifiedCheckpoint:  beaconState.PreviousJustifiedCheckpoint(),
-		CurrentJustifiedCheckpoint:   beaconState.CurrentJustifiedCheckpoint(),
-		FinalizedCheckpoint:          beaconState.FinalizedCheckpoint(),
-		InactivityScores:             inactivityScores,
-		CurrentSyncCommittee:         currentSyncCommittee,
-		NextSyncCommittee:            nextSyncCommittee,
-		NextWithdrawalIndex:          wi,
-		NextWithdrawalValidatorIndex: vi,
-		HistoricalSummaries:          summaries,
-
-		DepositRequestsStartIndex:     params.BeaconConfig().UnsetDepositRequestsStartIndex,
-		DepositBalanceToConsume:       depositBalanceToConsume,
-		ExitBalanceToConsume:          exitBalanceToConsume,
-		EarliestExitEpoch:             earliestExitEpoch,
-		ConsolidationBalanceToConsume: consolidationBalanceToConsume,
-		EarliestConsolidationEpoch:    earliestConsolidationEpoch,
-		PendingDeposits:               pendingDeposits,
-		PendingPartialWithdrawals:     pendingPartialWithdrawals,
-		PendingConsolidations:         pendingConsolidations,
-
-		// Newly added for EIP7732
-		LatestExecutionPayloadHeader: &enginev1.ExecutionPayloadHeaderEPBS{
-			ParentBlockHash:        make([]byte, 32),
-			ParentBlockRoot:        make([]byte, 32),
-			BlockHash:              make([]byte, 32),
-			BlobKzgCommitmentsRoot: make([]byte, 32),
-		},
-		LatestBlockHash:       payloadHeader.BlockHash(),
-		LatestFullSlot:        beaconState.Slot(),
-		LatestWithdrawalsRoot: make([]byte, 32),
-	}
-
-	post, err := state_native.InitializeFromProtoUnsafeEpbs(s)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to initialize post EIP-7732 beaconState")
-	}
-
-	return post, nil
-}
--- a/beacon-chain/core/epbs/upgrade_test.go
+++ b/beacon-chain/core/epbs/upgrade_test.go
@@ -1,135 +0,0 @@
-package epbs_test
-
-import (
-	"testing"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-	"github.com/prysmaticlabs/prysm/v5/testing/util"
-	"github.com/prysmaticlabs/prysm/v5/time/slots"
-)
-
-func TestUpgradeToEip7732(t *testing.T) {
-	st, _ := util.DeterministicGenesisStateElectra(t, params.BeaconConfig().MaxValidatorsPerCommittee)
-	require.NoError(t, st.SetHistoricalRoots([][]byte{{1}}))
-
-	preForkState := st.Copy()
-	mSt, err := epbs.UpgradeToEIP7732(st)
-	require.NoError(t, err)
-
-	require.Equal(t, preForkState.GenesisTime(), mSt.GenesisTime())
-	require.DeepSSZEqual(t, preForkState.GenesisValidatorsRoot(), mSt.GenesisValidatorsRoot())
-	require.Equal(t, preForkState.Slot(), mSt.Slot())
-	require.DeepSSZEqual(t, preForkState.LatestBlockHeader(), mSt.LatestBlockHeader())
-	require.DeepSSZEqual(t, preForkState.BlockRoots(), mSt.BlockRoots())
-	require.DeepSSZEqual(t, preForkState.StateRoots(), mSt.StateRoots())
-	require.DeepSSZEqual(t, preForkState.Validators()[2:], mSt.Validators()[2:])
-	require.DeepSSZEqual(t, preForkState.Balances()[2:], mSt.Balances()[2:])
-	require.DeepSSZEqual(t, preForkState.Eth1Data(), mSt.Eth1Data())
-	require.DeepSSZEqual(t, preForkState.Eth1DataVotes(), mSt.Eth1DataVotes())
-	require.DeepSSZEqual(t, preForkState.Eth1DepositIndex(), mSt.Eth1DepositIndex())
-	require.DeepSSZEqual(t, preForkState.RandaoMixes(), mSt.RandaoMixes())
-	require.DeepSSZEqual(t, preForkState.Slashings(), mSt.Slashings())
-	require.DeepSSZEqual(t, preForkState.JustificationBits(), mSt.JustificationBits())
-	require.DeepSSZEqual(t, preForkState.PreviousJustifiedCheckpoint(), mSt.PreviousJustifiedCheckpoint())
-	require.DeepSSZEqual(t, preForkState.CurrentJustifiedCheckpoint(), mSt.CurrentJustifiedCheckpoint())
-	require.DeepSSZEqual(t, preForkState.FinalizedCheckpoint(), mSt.FinalizedCheckpoint())
-
-	require.Equal(t, len(preForkState.Validators()), len(mSt.Validators()))
-
-	numValidators := mSt.NumValidators()
-	p, err := mSt.PreviousEpochParticipation()
-	require.NoError(t, err)
-	require.DeepSSZEqual(t, make([]byte, numValidators), p)
-	p, err = mSt.CurrentEpochParticipation()
-	require.NoError(t, err)
-	require.DeepSSZEqual(t, make([]byte, numValidators), p)
-	s, err := mSt.InactivityScores()
-	require.NoError(t, err)
-	require.DeepSSZEqual(t, make([]uint64, numValidators), s)
-
-	hr1, err := preForkState.HistoricalRoots()
-	require.NoError(t, err)
-	hr2, err := mSt.HistoricalRoots()
-	require.NoError(t, err)
-	require.DeepEqual(t, hr1, hr2)
-
-	f := mSt.Fork()
-	require.DeepSSZEqual(t, &ethpb.Fork{
-		PreviousVersion: st.Fork().CurrentVersion,
-		CurrentVersion:  params.BeaconConfig().EPBSForkVersion,
-		Epoch:           time.CurrentEpoch(st),
-	}, f)
-	csc, err := mSt.CurrentSyncCommittee()
-	require.NoError(t, err)
-	psc, err := preForkState.CurrentSyncCommittee()
-	require.NoError(t, err)
-	require.DeepSSZEqual(t, psc, csc)
-	nsc, err := mSt.NextSyncCommittee()
-	require.NoError(t, err)
-	psc, err = preForkState.NextSyncCommittee()
-	require.NoError(t, err)
-	require.DeepSSZEqual(t, psc, nsc)
-
-	nwi, err := mSt.NextWithdrawalIndex()
-	require.NoError(t, err)
-	require.Equal(t, uint64(0), nwi)
-
-	lwvi, err := mSt.NextWithdrawalValidatorIndex()
-	require.NoError(t, err)
-	require.Equal(t, primitives.ValidatorIndex(0), lwvi)
-
-	summaries, err := mSt.HistoricalSummaries()
-	require.NoError(t, err)
-	require.Equal(t, 0, len(summaries))
-
-	startIndex, err := mSt.DepositRequestsStartIndex()
-	require.NoError(t, err)
-	require.Equal(t, params.BeaconConfig().UnsetDepositRequestsStartIndex, startIndex)
-
-	balance, err := mSt.DepositBalanceToConsume()
-	require.NoError(t, err)
-	require.Equal(t, primitives.Gwei(0), balance)
-
-	tab, err := helpers.TotalActiveBalance(mSt)
-	require.NoError(t, err)
-
-	ebtc, err := mSt.ExitBalanceToConsume()
-	require.NoError(t, err)
-	require.Equal(t, helpers.ActivationExitChurnLimit(primitives.Gwei(tab)), ebtc)
-
-	cbtc, err := mSt.ConsolidationBalanceToConsume()
-	require.NoError(t, err)
-	require.Equal(t, helpers.ConsolidationChurnLimit(primitives.Gwei(tab)), cbtc)
-
-	earliestConsolidationEpoch, err := mSt.EarliestConsolidationEpoch()
-	require.NoError(t, err)
-	require.Equal(t, helpers.ActivationExitEpoch(slots.ToEpoch(preForkState.Slot())), earliestConsolidationEpoch)
-
-	// EIP-7732 checks.
-	h, err := mSt.LatestExecutionPayloadHeaderEPBS()
-	require.NoError(t, err)
-	require.DeepEqual(t, &enginev1.ExecutionPayloadHeaderEPBS{
-		ParentBlockHash:        make([]byte, 32),
-		ParentBlockRoot:        make([]byte, 32),
-		BlockHash:              make([]byte, 32),
-		BlobKzgCommitmentsRoot: make([]byte, 32),
-	}, h)
-	lwr, err := mSt.LastWithdrawalsRoot()
-	require.NoError(t, err)
-	require.DeepEqual(t, lwr, make([]byte, 32))
-	lbh, err := mSt.LatestBlockHash()
-	require.NoError(t, err)
-	lh, err := preForkState.LatestExecutionPayloadHeader()
-	require.NoError(t, err)
-	require.DeepEqual(t, lbh, lh.BlockHash())
-	slot, err := mSt.LatestFullSlot()
-	require.NoError(t, err)
-	require.Equal(t, slot, preForkState.Slot())
-}
--- a/beacon-chain/core/feed/state/events.go
+++ b/beacon-chain/core/feed/state/events.go
@@ -33,8 +33,6 @@ const (
 	LightClientOptimisticUpdate
 	// PayloadAttributes events are fired upon a missed slot or new head.
 	PayloadAttributes
-	// PayloadProcessed is fired when a payload is processed.
-	PayloadProcessed
 )

 // BlockProcessedData is the data sent with BlockProcessed events.
@@ -51,17 +49,6 @@ type BlockProcessedData struct {
 	Optimistic bool
 }

-type PayloadProcessedData struct {
-	// Slot is the slot of the processed block.
-	Slot primitives.Slot
-	// BlockRoot of the processed block.
-	BlockRoot [32]byte
-	// ExecutionBlockHash is the hash of the execution payload.
-	ExecutionBlockHash [32]byte
-	// ExecutionOptimistic is true if the execution payload is optimistic.
-	ExecutionOptimistic bool
-}
-
 // ChainStartedData is the data sent with ChainStarted events.
 type ChainStartedData struct {
 	// StartTime is the time at which the chain started.
--- a/beacon-chain/core/helpers/BUILD.bazel
+++ b/beacon-chain/core/helpers/BUILD.bazel
@@ -7,9 +7,7 @@ go_library(
        "beacon_committee.go",
        "block.go",
        "genesis.go",
-        "legacy.go",
        "metrics.go",
-        "payload_attestation.go",
        "randao.go",
        "rewards_penalties.go",
        "shuffle.go",
@@ -22,13 +20,11 @@ go_library(
    visibility = ["//visibility:public"],
    deps = [
        "//beacon-chain/cache:go_default_library",
-        "//beacon-chain/core/signing:go_default_library",
        "//beacon-chain/core/time:go_default_library",
        "//beacon-chain/forkchoice/types:go_default_library",
        "//beacon-chain/state:go_default_library",
        "//config/fieldparams:go_default_library",
        "//config/params:go_default_library",
-        "//consensus-types/epbs:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//container/slice:go_default_library",
        "//container/trie:go_default_library",
@@ -56,9 +52,6 @@ go_test(
        "attestation_test.go",
        "beacon_committee_test.go",
        "block_test.go",
-        "exports_test.go",
-        "legacy_test.go",
-        "payload_attestation_test.go",
        "private_access_fuzz_noop_test.go",  # keep
        "private_access_test.go",
        "randao_test.go",
@@ -75,30 +68,23 @@ go_test(
    tags = ["CI_race_detection"],
    deps = [
        "//beacon-chain/cache:go_default_library",
-        "//beacon-chain/core/signing:go_default_library",
        "//beacon-chain/core/time:go_default_library",
        "//beacon-chain/forkchoice/types:go_default_library",
        "//beacon-chain/state:go_default_library",
        "//beacon-chain/state/state-native:go_default_library",
        "//config/fieldparams:go_default_library",
        "//config/params:go_default_library",
-        "//consensus-types/epbs:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//container/slice:go_default_library",
-        "//crypto/bls:go_default_library",
        "//crypto/hash:go_default_library",
-        "//crypto/rand:go_default_library",
        "//encoding/bytesutil:go_default_library",
-        "//math:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//runtime/version:go_default_library",
        "//testing/assert:go_default_library",
        "//testing/require:go_default_library",
        "//testing/util:go_default_library",
-        "//testing/util/random:go_default_library",
        "//time:go_default_library",
        "//time/slots:go_default_library",
        "@com_github_prysmaticlabs_go_bitfield//:go_default_library",
-        "@com_github_stretchr_testify//require:go_default_library",
    ],
 )
--- a/beacon-chain/core/helpers/beacon_committee.go
+++ b/beacon-chain/core/helpers/beacon_committee.go
@@ -213,7 +213,6 @@ type CommitteeAssignment struct {
 	Committee      []primitives.ValidatorIndex
 	AttesterSlot   primitives.Slot
 	CommitteeIndex primitives.CommitteeIndex
-	PtcSlot        primitives.Slot
 }

 // verifyAssignmentEpoch verifies if the given epoch is valid for assignment based on the provided state.
@@ -295,7 +294,7 @@ func CommitteeAssignments(ctx context.Context, state state.BeaconState, epoch pr
 	if err := verifyAssignmentEpoch(epoch, state); err != nil {
 		return nil, err
 	}
-	slot, err := slots.EpochStart(epoch)
+	startSlot, err := slots.EpochStart(epoch)
 	if err != nil {
 		return nil, err
 	}
@@ -304,17 +303,14 @@ func CommitteeAssignments(ctx context.Context, state state.BeaconState, epoch pr
 		vals[v] = struct{}{}
 	}
 	assignments := make(map[primitives.ValidatorIndex]*CommitteeAssignment)
-
-	committees, err := BeaconCommittees(ctx, state, slot)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not compute beacon committees")
-	}
-	ptcPerSlot, ptcMembersPerCommittee := PtcAllocation(len(committees))
 	// Compute committee assignments for each slot in the epoch.
-	endSlot := slot + params.BeaconConfig().SlotsPerEpoch
-	for {
+	for slot := startSlot; slot < startSlot+params.BeaconConfig().SlotsPerEpoch; slot++ {
+		committees, err := BeaconCommittees(ctx, state, slot)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not compute beacon committees")
+		}
 		for j, committee := range committees {
-			for i, vIndex := range committee {
+			for _, vIndex := range committee {
 				if _, ok := vals[vIndex]; !ok { // Skip if the validator is not in the provided validators slice.
 					continue
 				}
@@ -324,19 +320,8 @@ func CommitteeAssignments(ctx context.Context, state state.BeaconState, epoch pr
 				assignments[vIndex].Committee = committee
 				assignments[vIndex].AttesterSlot = slot
 				assignments[vIndex].CommitteeIndex = primitives.CommitteeIndex(j)
-				if uint64(j) < ptcPerSlot && uint64(i) < ptcMembersPerCommittee {
-					assignments[vIndex].PtcSlot = slot
-				}
 			}
 		}
-		slot++
-		if slot == endSlot {
-			break
-		}
-		committees, err = BeaconCommittees(ctx, state, slot)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not compute beacon committees")
-		}
 	}
 	return assignments, nil
 }
--- a/beacon-chain/core/helpers/beacon_committee_test.go
+++ b/beacon-chain/core/helpers/beacon_committee_test.go
@@ -3,7 +3,6 @@ package helpers_test
 import (
 	"context"
 	"fmt"
-	"slices"
 	"strconv"
 	"testing"

@@ -11,7 +10,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
-	field_params "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/container/slice"
@@ -731,26 +729,15 @@ func TestCommitteeIndices(t *testing.T) {
 	assert.DeepEqual(t, []primitives.CommitteeIndex{0, 1, 3}, indices)
 }

-func TestCommitteeAssignments_PTC(t *testing.T) {
-	helpers.ClearCache()
-	// Create 10 committees. Total 40960 validators.
-	committeeCount := uint64(10)
-	validatorCount := committeeCount * params.BeaconConfig().TargetCommitteeSize * uint64(params.BeaconConfig().SlotsPerEpoch)
-	validators := make([]*ethpb.Validator, validatorCount)
-	validatorIndices := make([]primitives.ValidatorIndex, validatorCount)
-
+func TestAttestationCommittees(t *testing.T) {
+	validators := make([]*ethpb.Validator, params.BeaconConfig().SlotsPerEpoch.Mul(params.BeaconConfig().TargetCommitteeSize))
 	for i := 0; i < len(validators); i++ {
-		k := make([]byte, 48)
-		copy(k, strconv.Itoa(i))
 		validators[i] = &ethpb.Validator{
-			PublicKey:             k,
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
+			ExitEpoch: params.BeaconConfig().FarFutureEpoch,
 		}
-		validatorIndices[i] = primitives.ValidatorIndex(i)
 	}

-	state, err := state_native.InitializeFromProtoEpbs(&ethpb.BeaconStateEPBS{
+	state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 		Validators:  validators,
 		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 	})
@@ -774,31 +761,6 @@ func TestCommitteeAssignments_PTC(t *testing.T) {
 		assert.Equal(t, params.BeaconConfig().TargetCommitteeSize, uint64(len(committees[0])))
 		assert.Equal(t, params.BeaconConfig().TargetCommitteeSize, uint64(len(committees[1])))
 	})
-	as, err := helpers.CommitteeAssignments(context.Background(), state, 1, validatorIndices)
-	require.NoError(t, err)
-
-	// Capture all the slots and all the validator index that belonged in a PTC using a map for verification later.
-	slotValidatorMap := make(map[primitives.Slot][]primitives.ValidatorIndex)
-	for i, a := range as {
-		slotValidatorMap[a.PtcSlot] = append(slotValidatorMap[a.PtcSlot], i)
-	}
-
-	// Verify that all the slots have the correct number of PTC.
-	for s, v := range slotValidatorMap {
-		if s == 0 {
-			continue
-		}
-		// Make sure all the PTC are the correct size from the map.
-		require.Equal(t, len(v), field_params.PTCSize)
-
-		// Get the actual PTC from the beacon state using the helper function
-		ptc, err := helpers.GetPayloadTimelinessCommittee(context.Background(), state, s)
-		require.NoError(t, err)
-		for _, index := range ptc {
-			i := slices.Index(v, index)
-			require.NotEqual(t, -1, i) // PTC not found from the assignment map
-		}
-	}
 }

 func TestBeaconCommittees(t *testing.T) {
--- a/beacon-chain/core/helpers/exports_test.go
+++ b/beacon-chain/core/helpers/exports_test.go
@@ -1,12 +0,0 @@
-package helpers
-
-var (
-	ErrNilMessage            = errNilMessage
-	ErrNilData               = errNilData
-	ErrNilBeaconBlockRoot    = errNilBeaconBlockRoot
-	ErrNilPayloadAttestation = errNilPayloadAttestation
-	ErrNilSignature          = errNilSignature
-	ErrNilAggregationBits    = errNilAggregationBits
-	ErrPreEPBSState          = errPreEPBSState
-	ErrCommitteeOverflow     = errCommitteeOverflow
-)
--- a/beacon-chain/core/helpers/legacy.go
+++ b/beacon-chain/core/helpers/legacy.go
@@ -1,20 +0,0 @@
-package helpers
-
-import (
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
-)
-
-// DepositRequestsStarted determines if the deposit requests have started.
-func DepositRequestsStarted(beaconState state.BeaconState) bool {
-	if beaconState.Version() < version.Electra {
-		return false
-	}
-
-	requestsStartIndex, err := beaconState.DepositRequestsStartIndex()
-	if err != nil {
-		return false
-	}
-
-	return beaconState.Eth1DepositIndex() == requestsStartIndex
-}
--- a/beacon-chain/core/helpers/legacy_test.go
+++ b/beacon-chain/core/helpers/legacy_test.go
@@ -1,33 +0,0 @@
-package helpers_test
-
-import (
-	"testing"
-
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v5/testing/util"
-	"github.com/stretchr/testify/require"
-)
-
-// TestDepositRequestHaveStarted contains several test cases for depositRequestHaveStarted.
-func TestDepositRequestHaveStarted(t *testing.T) {
-	t.Run("Version below Electra returns false", func(t *testing.T) {
-		st, _ := util.DeterministicGenesisStateBellatrix(t, 1)
-		result := helpers.DepositRequestsStarted(st)
-		require.False(t, result)
-	})
-
-	t.Run("Version is Electra or higher, no error, but Eth1DepositIndex != requestsStartIndex returns false", func(t *testing.T) {
-		st, _ := util.DeterministicGenesisStateElectra(t, 1)
-		require.NoError(t, st.SetEth1DepositIndex(1))
-		result := helpers.DepositRequestsStarted(st)
-		require.False(t, result)
-	})
-
-	t.Run("Version is Electra or higher, no error, and Eth1DepositIndex == requestsStartIndex returns true", func(t *testing.T) {
-		st, _ := util.DeterministicGenesisStateElectra(t, 1)
-		require.NoError(t, st.SetEth1DepositIndex(33))
-		require.NoError(t, st.SetDepositRequestsStartIndex(33))
-		result := helpers.DepositRequestsStarted(st)
-		require.True(t, result)
-	})
-}
--- a/beacon-chain/core/helpers/payload_attestation.go
+++ b/beacon-chain/core/helpers/payload_attestation.go
@@ -1,296 +0,0 @@
-package helpers
-
-import (
-	"context"
-	"slices"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/epbs"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v5/math"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
-	"github.com/prysmaticlabs/prysm/v5/time/slots"
-)
-
-var (
-	errNilMessage            = errors.New("nil PayloadAttestationMessage")
-	errNilData               = errors.New("nil PayloadAttestationData")
-	errNilBeaconBlockRoot    = errors.New("nil BeaconBlockRoot")
-	errNilPayloadAttestation = errors.New("nil PayloadAttestation")
-	errNilSignature          = errors.New("nil Signature")
-	errNilAggregationBits    = errors.New("nil AggregationBits")
-	errPreEPBSState          = errors.New("beacon state pre ePBS fork")
-	errCommitteeOverflow     = errors.New("beacon committee of insufficient size")
-)
-
-// ValidateNilPayloadAttestationData checks if any composite field of the
-// payload attestation data is nil
-func ValidateNilPayloadAttestationData(data *eth.PayloadAttestationData) error {
-	if data == nil {
-		return errNilData
-	}
-	if data.BeaconBlockRoot == nil {
-		return errNilBeaconBlockRoot
-	}
-	return nil
-}
-
-// ValidateNilPayloadAttestationMessage checks if any composite field of the
-// payload attestation message is nil
-func ValidateNilPayloadAttestationMessage(att *eth.PayloadAttestationMessage) error {
-	if att == nil {
-		return errNilMessage
-	}
-	if att.Signature == nil {
-		return errNilSignature
-	}
-	return ValidateNilPayloadAttestationData(att.Data)
-}
-
-// ValidateNilPayloadAttestation checks if any composite field of the
-// payload attestation is nil
-func ValidateNilPayloadAttestation(att *eth.PayloadAttestation) error {
-	if att == nil {
-		return errNilPayloadAttestation
-	}
-	if att.AggregationBits == nil {
-		return errNilAggregationBits
-	}
-	if att.Signature == nil {
-		return errNilSignature
-	}
-	return ValidateNilPayloadAttestationData(att.Data)
-}
-
-// InPayloadTimelinessCommittee returns whether the given index belongs to the
-// PTC computed from the passed state.
-func InPayloadTimelinessCommittee(ctx context.Context, state state.ReadOnlyBeaconState, slot primitives.Slot, idx primitives.ValidatorIndex) (bool, error) {
-	ptc, err := GetPayloadTimelinessCommittee(ctx, state, slot)
-	if err != nil {
-		return false, err
-	}
-	for _, i := range ptc {
-		if i == idx {
-			return true, nil
-		}
-	}
-	return false, nil
-}
-
-// GetPayloadTimelinessCommittee returns the PTC for the given slot, computed from the passed state as in the
-// spec function `get_ptc`.
-func GetPayloadTimelinessCommittee(ctx context.Context, state state.ReadOnlyBeaconState, slot primitives.Slot) (indices []primitives.ValidatorIndex, err error) {
-	if state.Version() < version.EPBS {
-		return nil, errPreEPBSState
-	}
-	committees, err := BeaconCommittees(ctx, state, slot)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get beacon committees")
-	}
-	committeesPerSlot, membersPerCommittee := PtcAllocation(len(committees))
-	for i, committee := range committees {
-		if uint64(i) >= committeesPerSlot {
-			return
-		}
-		if uint64(len(committee)) < membersPerCommittee {
-			return nil, errCommitteeOverflow
-		}
-		indices = append(indices, committee[:membersPerCommittee]...)
-	}
-	return
-}
-
-// PtcAllocation returns:
-// 1. The number of beacon committees that PTC will borrow from in a slot.
-// 2. The number of validators that PTC will borrow from in a beacon committee.
-func PtcAllocation(slotCommittees int) (committeesPerSlot, membersPerCommittee uint64) {
-	committeesPerSlot = math.LargestPowerOfTwo(math.Min(uint64(slotCommittees), fieldparams.PTCSize))
-	membersPerCommittee = fieldparams.PTCSize / committeesPerSlot
-	return
-}
-
-// GetPayloadAttestingIndices returns the set of attester indices corresponding to the given PayloadAttestation.
-//
-// Spec pseudocode definition:
-//
-//	def get_payload_attesting_indices(state: BeaconState, slot: Slot,
-//		payload_attestation: PayloadAttestation) -> Set[ValidatorIndex]:
-//	"""
-//	Return the set of attesting indices corresponding to ``payload_attestation``.
-//	"""
-//	ptc = get_ptc(state, slot)
-//	return set(index for i, index in enumerate(ptc) if payload_attestation.aggregation_bits[i])
-func GetPayloadAttestingIndices(ctx context.Context, state state.ReadOnlyBeaconState, slot primitives.Slot, att *eth.PayloadAttestation) (indices []primitives.ValidatorIndex, err error) {
-	if state.Version() < version.EPBS {
-		return nil, errPreEPBSState
-	}
-
-	ptc, err := GetPayloadTimelinessCommittee(ctx, state, slot)
-	if err != nil {
-		return nil, err
-	}
-
-	for i, validatorIndex := range ptc {
-		if att.AggregationBits.BitAt(uint64(i)) {
-			indices = append(indices, validatorIndex)
-		}
-	}
-
-	return
-}
-
-// GetIndexedPayloadAttestation replaces a PayloadAttestation's AggregationBits with sorted AttestingIndices and returns an IndexedPayloadAttestation.
-//
-// Spec pseudocode definition:
-//
-//	def get_indexed_payload_attestation(state: BeaconState, slot: Slot,
-//		payload_attestation: PayloadAttestation) -> IndexedPayloadAttestation:
-//	"""
-//	Return the indexed payload attestation corresponding to ``payload_attestation``.
-//	"""
-//	attesting_indices = get_payload_attesting_indices(state, slot, payload_attestation)
-//
-//	return IndexedPayloadAttestation(
-//	attesting_indices=sorted(attesting_indices),
-//	data=payload_attestation.data,
-//	signature=payload_attestation.signature,
-//	)
-func GetIndexedPayloadAttestation(ctx context.Context, state state.ReadOnlyBeaconState, slot primitives.Slot, att *eth.PayloadAttestation) (*epbs.IndexedPayloadAttestation, error) {
-	if state.Version() < version.EPBS {
-		return nil, errPreEPBSState
-	}
-
-	attestingIndices, err := GetPayloadAttestingIndices(ctx, state, slot, att)
-	if err != nil {
-		return nil, err
-	}
-
-	slices.Sort(attestingIndices)
-
-	return &epbs.IndexedPayloadAttestation{
-		AttestingIndices: attestingIndices,
-		Data:             att.Data,
-		Signature:        att.Signature,
-	}, nil
-}
-
-// IsValidIndexedPayloadAttestation validates the given IndexedPayloadAttestation.
-//
-// Spec pseudocode definition:
-//
-//	def is_valid_indexed_payload_attestation(
-//		state: BeaconState,
-//		indexed_payload_attestation: IndexedPayloadAttestation) -> bool:
-//	"""
-//	Check if ``indexed_payload_attestation`` is not empty, has sorted and unique indices and has
-//	a valid aggregate signature.
-//	"""
-//	# Verify the data is valid
-//	if indexed_payload_attestation.data.payload_status >= PAYLOAD_INVALID_STATUS:
-//		return False
-//
-//	# Verify indices are sorted and unique
-//	indices = indexed_payload_attestation.attesting_indices
-//	if len(indices) == 0 or not indices == sorted(set(indices)):
-//		return False
-//
-//	# Verify aggregate signature
-//	pubkeys = [state.validators[i].pubkey for i in indices]
-//	domain = get_domain(state, DOMAIN_PTC_ATTESTER, None)
-//	signing_root = compute_signing_root(indexed_payload_attestation.data, domain)
-//	return bls.FastAggregateVerify(pubkeys, signing_root, indexed_payload_attestation.signature)
-func IsValidIndexedPayloadAttestation(state state.ReadOnlyBeaconState, att *epbs.IndexedPayloadAttestation) (bool, error) {
-	if state.Version() < version.EPBS {
-		return false, errPreEPBSState
-	}
-
-	// Verify the data is valid.
-	if primitives.PTCStatus(att.Data.PayloadStatus[0]) >= primitives.PAYLOAD_INVALID_STATUS {
-		return false, nil
-	}
-
-	// Verify indices are sorted and unique.
-	indices := att.AttestingIndices
-	slices.Sort(indices)
-	if len(indices) == 0 || !slices.Equal(att.AttestingIndices, indices) {
-		return false, nil
-	}
-
-	// Verify aggregate signature.
-	publicKeys := make([]bls.PublicKey, len(indices))
-	for i, index := range indices {
-		validator, err := state.ValidatorAtIndexReadOnly(index)
-		if err != nil {
-			return false, err
-		}
-
-		publicKeyBytes := validator.PublicKey()
-		publicKey, err := bls.PublicKeyFromBytes(publicKeyBytes[:])
-		if err != nil {
-			return false, err
-		}
-
-		publicKeys[i] = publicKey
-	}
-
-	domain, err := signing.Domain(
-		state.Fork(),
-		slots.ToEpoch(state.Slot()),
-		params.BeaconConfig().DomainPTCAttester,
-		state.GenesisValidatorsRoot(),
-	)
-	if err != nil {
-		return false, err
-	}
-
-	signingRoot, err := signing.ComputeSigningRoot(att.Data, domain)
-	if err != nil {
-		return false, err
-	}
-
-	signature, err := bls.SignatureFromBytes(att.Signature)
-	if err != nil {
-		return false, err
-	}
-
-	return signature.FastAggregateVerify(publicKeys, signingRoot), nil
-}
-
-// ValidatePayloadAttestationMessageSignature verifies the signature of a
-// payload attestation message.
-func ValidatePayloadAttestationMessageSignature(ctx context.Context, st state.ReadOnlyBeaconState, msg *eth.PayloadAttestationMessage) error {
-	if err := ValidateNilPayloadAttestationMessage(msg); err != nil {
-		return err
-	}
-	val, err := st.ValidatorAtIndex(msg.ValidatorIndex)
-	if err != nil {
-		return err
-	}
-	pub, err := bls.PublicKeyFromBytes(val.PublicKey)
-	if err != nil {
-		return err
-	}
-	sig, err := bls.SignatureFromBytes(msg.Signature)
-	if err != nil {
-		return err
-	}
-	currentEpoch := slots.ToEpoch(st.Slot())
-	domain, err := signing.Domain(st.Fork(), currentEpoch, params.BeaconConfig().DomainPTCAttester, st.GenesisValidatorsRoot())
-	if err != nil {
-		return err
-	}
-	root, err := signing.ComputeSigningRoot(msg.Data, domain)
-	if err != nil {
-		return err
-	}
-	if !sig.Verify(pub, root[:]) {
-		return signing.ErrSigFailedToVerify
-	}
-	return nil
-}
--- a/beacon-chain/core/helpers/payload_attestation_test.go
+++ b/beacon-chain/core/helpers/payload_attestation_test.go
@@ -1,363 +0,0 @@
-package helpers_test
-
-import (
-	"context"
-	"slices"
-	"strconv"
-	"testing"
-
-	"github.com/prysmaticlabs/go-bitfield"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
-	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/epbs"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v5/crypto/rand"
-	"github.com/prysmaticlabs/prysm/v5/math"
-	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-	"github.com/prysmaticlabs/prysm/v5/testing/util"
-	"github.com/prysmaticlabs/prysm/v5/testing/util/random"
-	"github.com/prysmaticlabs/prysm/v5/time/slots"
-)
-
-func TestValidateNilPayloadAttestation(t *testing.T) {
-	require.ErrorIs(t, helpers.ErrNilData, helpers.ValidateNilPayloadAttestationData(nil))
-	data := &eth.PayloadAttestationData{}
-	require.ErrorIs(t, helpers.ErrNilBeaconBlockRoot, helpers.ValidateNilPayloadAttestationData(data))
-	data.BeaconBlockRoot = make([]byte, 32)
-	require.NoError(t, helpers.ValidateNilPayloadAttestationData(data))
-
-	require.ErrorIs(t, helpers.ErrNilMessage, helpers.ValidateNilPayloadAttestationMessage(nil))
-	message := &eth.PayloadAttestationMessage{}
-	require.ErrorIs(t, helpers.ErrNilSignature, helpers.ValidateNilPayloadAttestationMessage(message))
-	message.Signature = make([]byte, 96)
-	require.ErrorIs(t, helpers.ErrNilData, helpers.ValidateNilPayloadAttestationMessage(message))
-	message.Data = data
-	require.NoError(t, helpers.ValidateNilPayloadAttestationMessage(message))
-
-	require.ErrorIs(t, helpers.ErrNilPayloadAttestation, helpers.ValidateNilPayloadAttestation(nil))
-	att := &eth.PayloadAttestation{}
-	require.ErrorIs(t, helpers.ErrNilAggregationBits, helpers.ValidateNilPayloadAttestation(att))
-	att.AggregationBits = bitfield.NewBitvector512()
-	require.ErrorIs(t, helpers.ErrNilSignature, helpers.ValidateNilPayloadAttestation(att))
-	att.Signature = message.Signature
-	require.ErrorIs(t, helpers.ErrNilData, helpers.ValidateNilPayloadAttestation(att))
-	att.Data = data
-	require.NoError(t, helpers.ValidateNilPayloadAttestation(att))
-}
-
-func TestGetPayloadTimelinessCommittee(t *testing.T) {
-	helpers.ClearCache()
-
-	// Create 10 committees
-	committeeCount := uint64(10)
-	validatorCount := committeeCount * params.BeaconConfig().TargetCommitteeSize * uint64(params.BeaconConfig().SlotsPerEpoch)
-	validators := make([]*ethpb.Validator, validatorCount)
-
-	for i := 0; i < len(validators); i++ {
-		k := make([]byte, 48)
-		copy(k, strconv.Itoa(i))
-		validators[i] = &ethpb.Validator{
-			PublicKey:             k,
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-		}
-	}
-
-	state, err := state_native.InitializeFromProtoEpbs(random.BeaconState(t))
-	require.NoError(t, err)
-	require.NoError(t, state.SetValidators(validators))
-	require.NoError(t, state.SetSlot(200))
-
-	ctx := context.Background()
-	indices, err := helpers.BeaconCommitteeFromState(ctx, state, state.Slot(), 1)
-	require.NoError(t, err)
-	require.Equal(t, 128, len(indices))
-
-	epoch := slots.ToEpoch(state.Slot())
-	activeCount, err := helpers.ActiveValidatorCount(ctx, state, epoch)
-	require.NoError(t, err)
-	require.Equal(t, uint64(40960), activeCount)
-
-	computedCommitteeCount := helpers.SlotCommitteeCount(activeCount)
-	require.Equal(t, committeeCount, computedCommitteeCount)
-	committeesPerSlot := math.LargestPowerOfTwo(math.Min(committeeCount, fieldparams.PTCSize))
-	require.Equal(t, uint64(8), committeesPerSlot)
-
-	ptc, err := helpers.GetPayloadTimelinessCommittee(ctx, state, state.Slot())
-	require.NoError(t, err)
-	require.Equal(t, fieldparams.PTCSize, len(ptc))
-
-	committee1, err := helpers.BeaconCommitteeFromState(ctx, state, state.Slot(), 0)
-	require.NoError(t, err)
-
-	require.DeepEqual(t, committee1[:64], ptc[:64])
-}
-
-func Test_PtcAllocation(t *testing.T) {
-	tests := []struct {
-		committeeCount     int
-		memberPerCommittee uint64
-		committeesPerSlot  uint64
-	}{
-		{1, 512, 1},
-		{4, 128, 4},
-		{128, 4, 128},
-		{512, 1, 512},
-		{1024, 1, 512},
-	}
-
-	for _, test := range tests {
-		committeesPerSlot, memberPerCommittee := helpers.PtcAllocation(test.committeeCount)
-		if memberPerCommittee != test.memberPerCommittee {
-			t.Errorf("memberPerCommittee(%d) = %d; expected %d", test.committeeCount, memberPerCommittee, test.memberPerCommittee)
-		}
-		if committeesPerSlot != test.committeesPerSlot {
-			t.Errorf("committeesPerSlot(%d) = %d; expected %d", test.committeeCount, committeesPerSlot, test.committeesPerSlot)
-		}
-	}
-}
-
-func TestGetPayloadAttestingIndices(t *testing.T) {
-	helpers.ClearCache()
-
-	// Create 10 committees. Total 40960 validators.
-	committeeCount := uint64(10)
-	validatorCount := committeeCount * params.BeaconConfig().TargetCommitteeSize * uint64(params.BeaconConfig().SlotsPerEpoch)
-	validators := make([]*ethpb.Validator, validatorCount)
-
-	for i := 0; i < len(validators); i++ {
-		pubkey := make([]byte, 48)
-		copy(pubkey, strconv.Itoa(i))
-		validators[i] = &ethpb.Validator{
-			PublicKey:             pubkey,
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-		}
-	}
-
-	// Create a beacon state.
-	state, err := state_native.InitializeFromProtoEpbs(&ethpb.BeaconStateEPBS{
-		Validators:  validators,
-		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
-	})
-	require.NoError(t, err)
-
-	// Get PTC.
-	ptc, err := helpers.GetPayloadTimelinessCommittee(context.Background(), state, state.Slot())
-	require.NoError(t, err)
-	require.Equal(t, fieldparams.PTCSize, len(ptc))
-
-	// Generate random indices. PTC members at the corresponding indices are considered attested.
-	randGen := rand.NewDeterministicGenerator()
-	attesterCount := randGen.Intn(fieldparams.PTCSize) + 1
-	indices := randGen.Perm(fieldparams.PTCSize)[:attesterCount]
-	slices.Sort(indices)
-	require.Equal(t, attesterCount, len(indices))
-
-	// Create a PayloadAttestation with AggregationBits set true at the indices.
-	aggregationBits := bitfield.NewBitvector512()
-	for _, index := range indices {
-		aggregationBits.SetBitAt(uint64(index), true)
-	}
-
-	payloadAttestation := &eth.PayloadAttestation{
-		AggregationBits: aggregationBits,
-		Data: &eth.PayloadAttestationData{
-			BeaconBlockRoot: make([]byte, 32),
-		},
-		Signature: make([]byte, 96),
-	}
-
-	// Get attesting indices.
-	attesters, err := helpers.GetPayloadAttestingIndices(context.Background(), state, state.Slot(), payloadAttestation)
-	require.NoError(t, err)
-	require.Equal(t, len(indices), len(attesters))
-
-	// Check if each attester equals to the PTC member at the corresponding index.
-	for i, index := range indices {
-		require.Equal(t, attesters[i], ptc[index])
-	}
-}
-
-func TestGetIndexedPayloadAttestation(t *testing.T) {
-	helpers.ClearCache()
-
-	// Create 10 committees. Total 40960 validators.
-	committeeCount := uint64(10)
-	validatorCount := committeeCount * params.BeaconConfig().TargetCommitteeSize * uint64(params.BeaconConfig().SlotsPerEpoch)
-	validators := make([]*ethpb.Validator, validatorCount)
-
-	for i := 0; i < len(validators); i++ {
-		publicKey := make([]byte, 48)
-		copy(publicKey, strconv.Itoa(i))
-		validators[i] = &ethpb.Validator{
-			PublicKey:             publicKey,
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-		}
-	}
-
-	// Create a beacon state.
-	state, err := state_native.InitializeFromProtoEpbs(&ethpb.BeaconStateEPBS{
-		Validators:  validators,
-		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
-	})
-	require.NoError(t, err)
-
-	// Get PTC.
-	ptc, err := helpers.GetPayloadTimelinessCommittee(context.Background(), state, state.Slot())
-	require.NoError(t, err)
-	require.Equal(t, fieldparams.PTCSize, len(ptc))
-
-	// Generate random indices. PTC members at the corresponding indices are considered attested.
-	randGen := rand.NewDeterministicGenerator()
-	attesterCount := randGen.Intn(fieldparams.PTCSize) + 1
-	indices := randGen.Perm(fieldparams.PTCSize)[:attesterCount]
-	slices.Sort(indices)
-	require.Equal(t, attesterCount, len(indices))
-
-	// Create a PayloadAttestation with AggregationBits set true at the indices.
-	aggregationBits := bitfield.NewBitvector512()
-	for _, index := range indices {
-		aggregationBits.SetBitAt(uint64(index), true)
-	}
-
-	payloadAttestation := &eth.PayloadAttestation{
-		AggregationBits: aggregationBits,
-		Data: &eth.PayloadAttestationData{
-			BeaconBlockRoot: make([]byte, 32),
-		},
-		Signature: make([]byte, 96),
-	}
-
-	// Get attesting indices.
-	ctx := context.Background()
-	attesters, err := helpers.GetPayloadAttestingIndices(ctx, state, state.Slot(), payloadAttestation)
-	require.NoError(t, err)
-	require.Equal(t, len(indices), len(attesters))
-
-	// Get an IndexedPayloadAttestation.
-	indexedPayloadAttestation, err := helpers.GetIndexedPayloadAttestation(ctx, state, state.Slot(), payloadAttestation)
-	require.NoError(t, err)
-	require.Equal(t, len(indices), len(indexedPayloadAttestation.AttestingIndices))
-	require.DeepEqual(t, payloadAttestation.Data, indexedPayloadAttestation.Data)
-	require.DeepEqual(t, payloadAttestation.Signature, indexedPayloadAttestation.Signature)
-
-	// Check if the attesting indices are the same.
-	slices.Sort(attesters) // GetIndexedPayloadAttestation sorts attesting indices.
-	require.DeepEqual(t, attesters, indexedPayloadAttestation.AttestingIndices)
-}
-
-func TestIsValidIndexedPayloadAttestation(t *testing.T) {
-	helpers.ClearCache()
-
-	// Create validators.
-	validatorCount := uint64(350)
-	validators := make([]*ethpb.Validator, validatorCount)
-	_, secretKeys, err := util.DeterministicDepositsAndKeys(validatorCount)
-	require.NoError(t, err)
-
-	for i := 0; i < len(validators); i++ {
-		validators[i] = &ethpb.Validator{
-			PublicKey:             secretKeys[i].PublicKey().Marshal(),
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-		}
-	}
-
-	// Create a beacon state.
-	state, err := state_native.InitializeFromProtoEpbs(&ethpb.BeaconStateEPBS{
-		Validators: validators,
-		Fork: &ethpb.Fork{
-			Epoch:           0,
-			CurrentVersion:  params.BeaconConfig().GenesisForkVersion,
-			PreviousVersion: params.BeaconConfig().GenesisForkVersion,
-		},
-		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
-	})
-	require.NoError(t, err)
-
-	// Define test cases.
-	tests := []struct {
-		attestation *epbs.IndexedPayloadAttestation
-	}{
-		{
-			attestation: &epbs.IndexedPayloadAttestation{
-				AttestingIndices: []primitives.ValidatorIndex{1},
-				Data: &eth.PayloadAttestationData{
-					BeaconBlockRoot: make([]byte, fieldparams.RootLength),
-				},
-				Signature: make([]byte, fieldparams.BLSSignatureLength),
-			},
-		},
-		{
-			attestation: &epbs.IndexedPayloadAttestation{
-				AttestingIndices: []primitives.ValidatorIndex{13, 19},
-				Data: &eth.PayloadAttestationData{
-					BeaconBlockRoot: make([]byte, fieldparams.RootLength),
-				},
-				Signature: make([]byte, fieldparams.BLSSignatureLength),
-			},
-		},
-		{
-			attestation: &epbs.IndexedPayloadAttestation{
-				AttestingIndices: []primitives.ValidatorIndex{123, 234, 345},
-				Data: &eth.PayloadAttestationData{
-					BeaconBlockRoot: make([]byte, fieldparams.RootLength),
-				},
-				Signature: make([]byte, fieldparams.BLSSignatureLength),
-			},
-		},
-		{
-			attestation: &epbs.IndexedPayloadAttestation{
-				AttestingIndices: []primitives.ValidatorIndex{38, 46, 54, 62, 70, 78, 86, 194},
-				Data: &eth.PayloadAttestationData{
-					BeaconBlockRoot: make([]byte, fieldparams.RootLength),
-				},
-				Signature: make([]byte, fieldparams.BLSSignatureLength),
-			},
-		},
-		{
-			attestation: &epbs.IndexedPayloadAttestation{
-				AttestingIndices: []primitives.ValidatorIndex{5},
-				Data: &eth.PayloadAttestationData{
-					BeaconBlockRoot: make([]byte, fieldparams.RootLength),
-				},
-				Signature: make([]byte, fieldparams.BLSSignatureLength),
-			},
-		},
-	}
-
-	// Run test cases.
-	for _, test := range tests {
-		signatures := make([]bls.Signature, len(test.attestation.AttestingIndices))
-		for i, index := range test.attestation.AttestingIndices {
-			signedBytes, err := signing.ComputeDomainAndSign(
-				state,
-				slots.ToEpoch(test.attestation.Data.Slot),
-				test.attestation.Data,
-				params.BeaconConfig().DomainPTCAttester,
-				secretKeys[index],
-			)
-			require.NoError(t, err)
-
-			signature, err := bls.SignatureFromBytes(signedBytes)
-			require.NoError(t, err)
-
-			signatures[i] = signature
-		}
-
-		aggregatedSignature := bls.AggregateSignatures(signatures)
-		test.attestation.Signature = aggregatedSignature.Marshal()
-
-		isValid, err := helpers.IsValidIndexedPayloadAttestation(state, test.attestation)
-		require.NoError(t, err)
-		require.Equal(t, true, isValid)
-	}
-}
--- a/beacon-chain/core/helpers/validator_churn.go
+++ b/beacon-chain/core/helpers/validator_churn.go
@@ -22,7 +22,7 @@ import (
 func BalanceChurnLimit(activeBalance primitives.Gwei) primitives.Gwei {
 	churn := max(
 		params.BeaconConfig().MinPerEpochChurnLimitElectra,
-		uint64(activeBalance)/params.BeaconConfig().ChurnLimitQuotient,
+		(uint64(activeBalance) / params.BeaconConfig().ChurnLimitQuotient),
 	)
 	return primitives.Gwei(churn - churn%params.BeaconConfig().EffectiveBalanceIncrement)
 }
--- a/beacon-chain/core/helpers/validators.go
+++ b/beacon-chain/core/helpers/validators.go
@@ -393,9 +393,9 @@ func ComputeProposerIndex(bState state.ReadOnlyBeaconState, activeIndices []prim
 		effectiveBal := v.EffectiveBalance()
 		if bState.Version() >= version.Electra {
 			binary.LittleEndian.PutUint64(seedBuffer[len(seed):], i/16)
-			randomBytes := hashFunc(seedBuffer)
+			randomByte := hashFunc(seedBuffer)
 			offset := (i % 16) * 2
-			randomValue := uint64(randomBytes[offset]) | uint64(randomBytes[offset+1])<<8
+			randomValue := uint64(randomByte[offset]) | uint64(randomByte[offset+1])<<8

 			if effectiveBal*fieldparams.MaxRandomValueElectra >= beaconConfig.MaxEffectiveBalanceElectra*randomValue {
 				return candidateIndex, nil
@@ -579,7 +579,7 @@ func IsPartiallyWithdrawableValidator(val state.ReadOnlyValidator, balance uint6
 //	"""
 //	Check if ``validator`` is partially withdrawable.
 //	"""
-//	max_effective_balance = get_max_effective_balance(validator)
+//	max_effective_balance = get_validator_max_effective_balance(validator)
 //	has_max_effective_balance = validator.effective_balance == max_effective_balance  # [Modified in Electra:EIP7251]
 //	has_excess_balance = balance > max_effective_balance  # [Modified in Electra:EIP7251]
 //	return (
@@ -619,7 +619,7 @@ func isPartiallyWithdrawableValidatorCapella(val state.ReadOnlyValidator, balanc
 //
 // Spec definition:
 //
-//	def get_max_effective_balance(validator: Validator) -> Gwei:
+//	def get_validator_max_effective_balance(validator: Validator) -> Gwei:
 //	    """
 //	    Get max effective balance for ``validator``.
 //	    """
--- a/beacon-chain/core/time/BUILD.bazel
+++ b/beacon-chain/core/time/BUILD.bazel
@@ -2,10 +2,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")

 go_library(
    name = "go_default_library",
-    srcs = [
-        "slot_epoch.go",
-        "slot_epoch_epbs.go",
-    ],
+    srcs = ["slot_epoch.go"],
    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time",
    visibility = ["//visibility:public"],
    deps = [
--- a/beacon-chain/core/time/slot_epoch_epbs.go
+++ b/beacon-chain/core/time/slot_epoch_epbs.go
@@ -1,15 +0,0 @@
-package time
-
-import (
-	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/time/slots"
-)
-
-// CanUpgradeToEip7732 returns true if the input `slot` can upgrade to EIP-7732(epbs).
-// Spec code:
-// If state.slot % SLOTS_PER_EPOCH == 0 and compute_epoch_at_slot(state.slot) == EIP7732_FORK_EPOCH
-func CanUpgradeToEip7732(slot primitives.Slot) bool {
-	epochStart := slots.IsEpochStart(slot)
-	return epochStart && slots.ToEpoch(slot) == params.BeaconConfig().EPBSForkEpoch
-}
--- a/beacon-chain/core/time/slot_epoch_test.go
+++ b/beacon-chain/core/time/slot_epoch_test.go
@@ -233,11 +233,6 @@ func TestCanUpgradeTo(t *testing.T) {
 			forkEpoch:   &beaconConfig.FuluForkEpoch,
 			upgradeFunc: time.CanUpgradeToFulu,
 		},
-		{
-			name:        "Eip7732",
-			forkEpoch:   &beaconConfig.EPBSForkEpoch,
-			upgradeFunc: time.CanUpgradeToEip7732,
-		},
 	}

 	for _, otc := range outerTestCases {
--- a/beacon-chain/core/transition/BUILD.bazel
+++ b/beacon-chain/core/transition/BUILD.bazel
@@ -9,7 +9,6 @@ go_library(
        "state-bellatrix.go",
        "trailing_slot_state_cache.go",
        "transition.go",
-        "transition_epbs.go",
        "transition_no_verify_sig.go",
    ],
    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition",
@@ -21,13 +20,13 @@ go_library(
        "//beacon-chain/core/capella:go_default_library",
        "//beacon-chain/core/deneb:go_default_library",
        "//beacon-chain/core/electra:go_default_library",
-        "//beacon-chain/core/epbs:go_default_library",
        "//beacon-chain/core/epoch:go_default_library",
        "//beacon-chain/core/epoch/precompute:go_default_library",
        "//beacon-chain/core/execution:go_default_library",
        "//beacon-chain/core/fulu:go_default_library",
        "//beacon-chain/core/helpers:go_default_library",
        "//beacon-chain/core/time:go_default_library",
+        "//beacon-chain/core/transition/interop:go_default_library",
        "//beacon-chain/core/validators:go_default_library",
        "//beacon-chain/state:go_default_library",
        "//beacon-chain/state/state-native:go_default_library",
@@ -47,7 +46,6 @@ go_library(
        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//runtime/version:go_default_library",
-        "//time/slots:go_default_library",
        "@com_github_pkg_errors//:go_default_library",
        "@com_github_prometheus_client_golang//prometheus:go_default_library",
        "@com_github_prometheus_client_golang//prometheus/promauto:go_default_library",
--- a/beacon-chain/core/transition/interop/BUILD.bazel
+++ b/beacon-chain/core/transition/interop/BUILD.bazel
@@ -14,6 +14,7 @@ go_library(
    ],
    deps = [
        "//beacon-chain/state:go_default_library",
+        "//config/features:go_default_library",
        "//consensus-types/interfaces:go_default_library",
        "//io/file:go_default_library",
        "@com_github_sirupsen_logrus//:go_default_library",
--- a/beacon-chain/core/transition/interop/write_block_to_disk.go
+++ b/beacon-chain/core/transition/interop/write_block_to_disk.go
@@ -5,12 +5,17 @@ import (
 	"os"
 	"path"

+	"github.com/prysmaticlabs/prysm/v5/config/features"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/io/file"
 )

 // WriteBlockToDisk as a block ssz. Writes to temp directory. Debug!
 func WriteBlockToDisk(block interfaces.ReadOnlySignedBeaconBlock, failed bool) {
+	if !features.Get().WriteSSZStateTransitions {
+		return
+	}
+
 	filename := fmt.Sprintf("beacon_block_%d.ssz", block.Block().Slot())
 	if failed {
 		filename = "failed_" + filename
--- a/beacon-chain/core/transition/interop/write_state_to_disk.go
+++ b/beacon-chain/core/transition/interop/write_state_to_disk.go
@@ -6,11 +6,15 @@ import (
 	"path"

 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v5/config/features"
 	"github.com/prysmaticlabs/prysm/v5/io/file"
 )

 // WriteStateToDisk as a state ssz. Writes to temp directory. Debug!
 func WriteStateToDisk(state state.ReadOnlyBeaconState) {
+	if !features.Get().WriteSSZStateTransitions {
+		return
+	}
 	fp := path.Join(os.TempDir(), fmt.Sprintf("beacon_state_%d.ssz", state.Slot()))
 	log.Warnf("Writing state to disk at %s", fp)
 	enc, err := state.MarshalSSZ()
--- a/beacon-chain/core/transition/transition.go
+++ b/beacon-chain/core/transition/transition.go
@@ -14,7 +14,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/capella"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/deneb"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/electra"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
 	e "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epoch"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epoch/precompute"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/execution"
@@ -382,15 +381,6 @@ func UpgradeState(ctx context.Context, state state.BeaconState) (state.BeaconSta
 		upgraded = true
 	}

-	if time.CanUpgradeToEip7732(slot) {
-		state, err = epbs.UpgradeToEIP7732(state)
-		if err != nil {
-			tracing.AnnotateError(span, err)
-			return nil, err
-		}
-		upgraded = true
-	}
-
 	if upgraded {
 		log.WithField("version", version.String(state.Version())).Info("Upgraded state to")
 	}
@@ -413,15 +403,11 @@ func VerifyOperationLengths(_ context.Context, state state.BeaconState, b interf
 		)
 	}

-	maxSlashings := params.BeaconConfig().MaxAttesterSlashings
-	if body.Version() >= version.Electra {
-		maxSlashings = params.BeaconConfig().MaxAttesterSlashingsElectra
-	}
-	if uint64(len(body.AttesterSlashings())) > maxSlashings {
+	if uint64(len(body.AttesterSlashings())) > params.BeaconConfig().MaxAttesterSlashings {
 		return nil, fmt.Errorf(
 			"number of attester slashings (%d) in block body exceeds allowed threshold of %d",
 			len(body.AttesterSlashings()),
-			maxSlashings,
+			params.BeaconConfig().MaxAttesterSlashings,
 		)
 	}

--- a/beacon-chain/core/transition/transition_epbs.go
+++ b/beacon-chain/core/transition/transition_epbs.go
@@ -1,111 +0,0 @@
-package transition
-
-import (
-	"fmt"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v5/runtime/version"
-	"github.com/prysmaticlabs/prysm/v5/time/slots"
-)
-
-func processExecution(state state.BeaconState, body interfaces.ReadOnlyBeaconBlockBody) (err error) {
-	if body.Version() >= version.EPBS {
-		state, err = blocks.ProcessWithdrawals(state, nil)
-		if err != nil {
-			return errors.Wrap(err, "could not process withdrawals")
-		}
-		return processExecutionPayloadHeader(state, body)
-	}
-	enabled, err := blocks.IsExecutionEnabled(state, body)
-	if err != nil {
-		return errors.Wrap(err, "could not check if execution is enabled")
-	}
-	if !enabled {
-		return nil
-	}
-	executionData, err := body.Execution()
-	if err != nil {
-		return err
-	}
-	if state.Version() >= version.Capella {
-		state, err = blocks.ProcessWithdrawals(state, executionData)
-		if err != nil {
-			return errors.Wrap(err, "could not process withdrawals")
-		}
-	}
-	if err := blocks.ProcessPayload(state, body); err != nil {
-		return errors.Wrap(err, "could not process execution data")
-	}
-	return nil
-}
-
-// This function verifies the signature as it is not necessarily signed by the
-// proposer
-func processExecutionPayloadHeader(state state.BeaconState, body interfaces.ReadOnlyBeaconBlockBody) (err error) {
-	sh, err := body.SignedExecutionPayloadHeader()
-	if err != nil {
-		return err
-	}
-	header, err := sh.Header()
-	if err != nil {
-		return err
-	}
-	if err := epbs.ValidatePayloadHeaderSignature(state, sh); err != nil {
-		return err
-	}
-	builderIndex := header.BuilderIndex()
-	builder, err := state.ValidatorAtIndex(builderIndex)
-	if err != nil {
-		return err
-	}
-	epoch := slots.ToEpoch(state.Slot())
-	if builder.ActivationEpoch > epoch || epoch >= builder.ExitEpoch {
-		return errors.New("builder is not active")
-	}
-	if builder.Slashed {
-		return errors.New("builder is slashed")
-	}
-	amount := header.Value()
-	builderBalance, err := state.BalanceAtIndex(builderIndex)
-	if err != nil {
-		return err
-	}
-	if amount > primitives.Gwei(builderBalance) {
-		return errors.New("builder has insufficient balance")
-	}
-	// sate.Slot == block.Slot because of process_slot
-	if header.Slot() != state.Slot() {
-		return errors.New("incorrect header slot")
-	}
-	// the state latest block header has the parent root because of
-	// process_block_header
-	blockHeader := state.LatestBlockHeader()
-	if header.ParentBlockRoot() != [32]byte(blockHeader.ParentRoot) {
-		return errors.New("incorrect parent block root")
-	}
-	lbh, err := state.LatestBlockHash()
-	if err != nil {
-		return err
-	}
-	if header.ParentBlockHash() != [32]byte(lbh) {
-		return fmt.Errorf("incorrect parent block hash, got: %x, wanted: %x", header.ParentBlockHash(), lbh)
-	}
-	if err := state.UpdateBalancesAtIndex(builderIndex, builderBalance-uint64(amount)); err != nil {
-		return err
-	}
-	if err := helpers.IncreaseBalance(state, blockHeader.ProposerIndex, uint64(amount)); err != nil {
-		return err
-	}
-	headerEPBS, ok := header.Proto().(*enginev1.ExecutionPayloadHeaderEPBS)
-	if !ok {
-		return errors.New("not an ePBS execution payload header")
-	}
-	return state.SetLatestExecutionPayloadHeaderEPBS(headerEPBS)
-}
--- a/beacon-chain/core/transition/transition_no_verify_sig.go
+++ b/beacon-chain/core/transition/transition_no_verify_sig.go
@@ -8,12 +8,12 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/altair"
 	b "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/epbs"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/electra"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition/interop"
 	v "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/validators"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	"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/crypto/bls"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
@@ -58,29 +58,15 @@ func ExecuteStateTransitionNoVerifyAnySig(
 	defer span.End()
 	var err error

+	interop.WriteBlockToDisk(signed, false /* Has the block failed */)
+	interop.WriteStateToDisk(st)
+
 	parentRoot := signed.Block().ParentRoot()
-	if st.Version() < version.EPBS {
-		st, err = ProcessSlotsUsingNextSlotCache(ctx, st, parentRoot[:], signed.Block().Slot())
-	} else {
-		var lastFullSlot primitives.Slot
-		lastFullSlot, err = st.LatestFullSlot()
-		if err != nil {
-			return nil, nil, errors.Wrap(err, "could not get state latest full slot")
-		}
-		if lastFullSlot == st.Slot() {
-			var hash []byte
-			hash, err = st.LatestBlockHash()
-			if err != nil {
-				return nil, nil, errors.Wrap(err, "could not get state latest block hash")
-			}
-			st, err = ProcessSlotsUsingNextSlotCache(ctx, st, hash, signed.Block().Slot())
-		} else {
-			st, err = ProcessSlotsUsingNextSlotCache(ctx, st, parentRoot[:], signed.Block().Slot())
-		}
-	}
+	st, err = ProcessSlotsUsingNextSlotCache(ctx, st, parentRoot[:], signed.Block().Slot())
 	if err != nil {
 		return nil, nil, errors.Wrap(err, "could not process slots")
 	}
+
 	// Execute per block transition.
 	set, st, err := ProcessBlockNoVerifyAnySig(ctx, st, signed)
 	if err != nil {
@@ -146,26 +132,7 @@ func CalculateStateRoot(

 	// Execute per slots transition.
 	var err error
-	var parentRoot [32]byte
-	if state.Version() >= version.EPBS {
-		signedHeader, err := signed.Block().Body().SignedExecutionPayloadHeader()
-		if err != nil {
-			return [32]byte{}, errors.Wrap(err, "could not retrieve signed execution payload header")
-		}
-		header, err := signedHeader.Header()
-		if err != nil {
-			return [32]byte{}, errors.Wrap(err, "could not retrieve execution payload header")
-		}
-		lbh, err := state.LatestBlockHash()
-		if err != nil {
-			return [32]byte{}, errors.Wrap(err, "could not get state latest block hash")
-		}
-		if header.ParentBlockHash() == [32]byte(lbh) {
-			parentRoot = [32]byte(lbh)
-		} else {
-			parentRoot = signed.Block().ParentRoot()
-		}
-	}
+	parentRoot := signed.Block().ParentRoot()
 	state, err = ProcessSlotsUsingNextSlotCache(ctx, state, parentRoot[:], signed.Block().Slot())
 	if err != nil {
 		return [32]byte{}, errors.Wrap(err, "could not process slots")
@@ -213,12 +180,6 @@ func ProcessBlockNoVerifyAnySig(
 		return nil, nil, err
 	}

-	sig := signed.Signature()
-	bSet, err := b.BlockSignatureBatch(st, blk.ProposerIndex(), sig[:], blk.HashTreeRoot)
-	if err != nil {
-		tracing.AnnotateError(span, err)
-		return nil, nil, errors.Wrap(err, "could not retrieve block signature set")
-	}
 	randaoReveal := signed.Block().Body().RandaoReveal()
 	rSet, err := b.RandaoSignatureBatch(ctx, st, randaoReveal[:])
 	if err != nil {
@@ -232,7 +193,7 @@ func ProcessBlockNoVerifyAnySig(

 	// Merge beacon block, randao and attestations signatures into a set.
 	set := bls.NewSet()
-	set.Join(bSet).Join(rSet).Join(aSet)
+	set.Join(rSet).Join(aSet)

 	if blk.Version() >= version.Capella {
 		changes, err := signed.Block().Body().BLSToExecutionChanges()
@@ -305,7 +266,7 @@ func ProcessOperationsNoVerifyAttsSigs(
 			return nil, err
 		}
 	} else {
-		state, err = epbs.ProcessOperations(ctx, state, beaconBlock)
+		state, err = electra.ProcessOperations(ctx, state, beaconBlock)
 		if err != nil {
 			return nil, err
 		}
@@ -351,9 +312,26 @@ func ProcessBlockForStateRoot(
 		return nil, errors.Wrap(err, "could not process block header")
 	}

-	if err := processExecution(state, blk.Body()); err != nil {
-		return nil, errors.Wrap(err, "could not process execution")
+	enabled, err := b.IsExecutionEnabled(state, blk.Body())
+	if err != nil {
+		return nil, errors.Wrap(err, "could not check if execution is enabled")
 	}
+	if enabled {
+		executionData, err := blk.Body().Execution()
+		if err != nil {
+			return nil, err
+		}
+		if state.Version() >= version.Capella {
+			state, err = b.ProcessWithdrawals(state, executionData)
+			if err != nil {
+				return nil, errors.Wrap(err, "could not process withdrawals")
+			}
+		}
+		if err = b.ProcessPayload(state, blk.Body()); err != nil {
+			return nil, errors.Wrap(err, "could not process execution data")
+		}
+	}
+
 	randaoReveal := signed.Block().Body().RandaoReveal()
 	state, err = b.ProcessRandaoNoVerify(state, randaoReveal[:])
 	if err != nil {
--- a/beacon-chain/core/transition/transition_no_verify_sig_test.go
+++ b/beacon-chain/core/transition/transition_no_verify_sig_test.go
@@ -158,9 +158,8 @@ func TestProcessBlockNoVerify_SigSetContainsDescriptions(t *testing.T) {
 	set, _, err := transition.ProcessBlockNoVerifyAnySig(context.Background(), beaconState, wsb)
 	require.NoError(t, err)
 	assert.Equal(t, len(set.Signatures), len(set.Descriptions), "Signatures and descriptions do not match up")
-	assert.Equal(t, "block signature", set.Descriptions[0])
-	assert.Equal(t, "randao signature", set.Descriptions[1])
-	assert.Equal(t, "attestation signature", set.Descriptions[2])
+	assert.Equal(t, "randao signature", set.Descriptions[0])
+	assert.Equal(t, "attestation signature", set.Descriptions[1])
 }

 func TestProcessOperationsNoVerifyAttsSigs_OK(t *testing.T) {
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Potuz	ce48bcd0fc	Paralellize commitment computation - Also fix --rlnc-block-chunks flag to pass it on the validator - Add a feature flag --rlnc-mesh-size to configure at runtime to how many peers we send chunks.	2025-05-15 14:28:09 -03:00
potuz	4217fee54c	add benches	2025-05-15 11:37:30 -03:00
potuz	b8ccfb6d13	Adjust meshsize as a function of chunk numbers	2025-05-14 14:20:50 -03:00
potuz	c72e3d9d67	add chunks feature flag	2025-05-13 16:22:56 -03:00
Potuz	bb4022fd01	add larger trusted setup	2025-05-13 15:37:07 -03:00
Potuz	740de753fb	Fix genesis block proposal (#15084 ) * Fix genesis block proposal * fix test * fix test 2	2025-04-24 10:07:55 -03:00
Potuz	11fd5cb40a	ignore some chunks and blocks earlier	2025-04-15 14:53:44 -03:00
Potuz	f4b5b89508	delay block proposal	2025-04-15 14:29:37 -03:00
Potuz	dcb1923d0b	better logs	2025-04-15 14:23:09 -03:00
Potuz	0c69601014	Add feature flag to delay block broadcast	2025-04-15 13:41:36 -03:00
Potuz	82e74cfa64	do not verify block signatures over RPC	2025-01-29 11:19:31 -03:00
Potuz	a90cdd8d7d	create new context to process blocks	2025-01-29 09:56:19 -03:00
Potuz	1220e0798a	send block feed when received via chunks	2025-01-29 08:48:26 -03:00
nisdas	8a6d74d636	Use SignedBeaconBlock	2025-01-28 22:41:04 +08:00
Potuz	b6f76033f1	Fix chunking	2025-01-28 08:29:44 -03:00
nisdas	cc5681b0d8	Build Reproducible Test	2025-01-28 14:28:13 +08:00
nisdas	f8ddcb8978	Fix Interface Assertion	2025-01-28 13:02:22 +08:00
Potuz	84051f43bb	broadcast chunks on gossip	2025-01-27 16:26:01 -03:00
Potuz	e593797a5c	add log when decoding a block	2025-01-27 16:10:22 -03:00
Potuz	51b86abd06	Broadcast chunked blocks	2025-01-27 16:05:41 -03:00
Potuz	c2073dfd3f	fix block encoding when chunking	2025-01-27 12:45:42 -03:00
nisdas	ca2a20e992	Fix Validator Config	2025-01-27 21:48:16 +08:00
Nishant Das	e4075b6684	Implement RLNC Broadcasting (#14830 ) Add a pubsub API to broadcast chunks	2025-01-27 10:18:54 -03:00
Potuz	50e327c7f8	Do not check blob signature	2025-01-24 06:29:28 -03:00
Potuz	2771bfc5f7	Add the signatures over the commitments to the block before processing the state transition	2025-01-24 06:29:28 -03:00
Potuz	186974fc7f	Add endpoint to propose blocks The implementation of Broadcast is blocked as it needs to be changed	2025-01-24 06:29:28 -03:00
Potuz	9ca832b4fb	remove signature check	2025-01-24 06:29:28 -03:00
Potuz	7a00a9cc16	Add Ristretto trusted setup Load the setup from a file and use it across all clients.	2025-01-24 06:29:28 -03:00
Potuz	9a3bcb876c	Add chunk broadcasting Also make `ReadOnlyBeaconBlockChunk` actually read only and copy the return values.	2025-01-24 06:29:28 -03:00
Potuz	8bb3c388ed	Handle the block when it can be recovered Still TODO - Handle chunks for pending blocks - Handle state transition logic - Handle rebroadcasting - Handle block production	2025-01-24 06:29:28 -03:00
Potuz	044456a2c3	prune the chunk cache every 10 minutes	2025-01-24 06:29:28 -03:00
Potuz	303ac87d17	Add a cache for incoming chunks - Finish validation of each incoming chunk including signature verification when needed. Still TODO: - Handle chunks for pending blocks - Convert the decoded block to an actual block and send it to the blockchain package.	2025-01-24 06:29:28 -03:00
Potuz	d93ab44a37	Handle incoming chunks on the P2P layer - Add hooks for the new topic "beacon_block_chunk" - Add protos for the new messages - Handle the sync package logic of signature validation - Create native types for the chunks to be handled in the sync package Still TODO: - Handle chunks for pending blocks. - Handle nodes with incoming chunks, avoid verifying signature twice - Decode the block and send it to the blockchain package	2025-01-24 06:29:28 -03:00
Potuz	8b905d24a0	Add feature flag	2025-01-24 06:29:28 -03:00
Potuz	f46eaa88bf	Add decoding and tests.	2025-01-24 06:29:28 -03:00
Potuz	799bd33158	Add node, receive and prepare message functions	2025-01-24 06:29:28 -03:00
Potuz	f51132fcda	Add echelon form and addRow	2025-01-24 06:29:28 -03:00
Potuz	a32ed2eb98	Add chunks and message verifying	2025-01-24 06:29:28 -03:00
Potuz	7043dacaf9	add committer	2025-01-24 06:29:28 -03:00