fix lint

* Handle addition overflow in `/eth/v1/beacon/rewards/attestations/{epoch}`

* Changelog

CHANGELOG.md

@@ -4,6 +4,29 @@ All notable changes to this project will be documented in this file.
 
 The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.
 
+## [v6.1.4](https://github.com/prysmaticlabs/prysm/compare/v6.1.3...v6.1.4) - 2025-10-24
+
+This release includes a bug fix affecting block proposals in rare cases, along with an important update for Windows users running post-Fusaka fork.
+
+### Added
+
+- SSZ-QL: Add endpoints for `BeaconState`/`BeaconBlock`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15888)
+- Add native state diff type and marshalling functions. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15250)
+- Update the earliest available slot after pruning operations in  beacon chain database pruner. This ensures the P2P layer accurately knows which historical data is available after pruning, preventing nodes from advertising or attempting to serve data that has been pruned. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15694)
+
+### Fixed
+
+- Correctly advertise (in ENR and beacon API) attestation subnets when using `--subscribe-all-subnets`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15880)
+- `randomPeer`: Return if the context is cancelled when waiting for peers. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15876)
+- Improve error message when the byte count read from disk when reading a data column sidecars is lower than expected. (Mostly, because the file is truncated.). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15881)
+- Delete the genesis state file when --clear-db / --force-clear-db is specified. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15883)
+- Fix sync committee subscription to use subnet indices instead of committee indices. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15885)
+- Fixed metadata extraction on Windows by correctly splitting file paths. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15899)
+- `VerifyDataColumnsSidecarKZGProofs`: Check if sizes match. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15892)
+- Fix recoverStateSummary to persist state summaries in stateSummaryBucket instead of stateBucket (#15896). [[PR]](https://github.com/prysmaticlabs/prysm/pull/15896)
+- `updateCustodyInfoInDB`: Use `NumberOfCustodyGroups` instead of `NumberOfColumns`. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15908)
+- Sync committee uses correct state to calculate position. [[PR]](https://github.com/prysmaticlabs/prysm/pull/15905)
+
 ## [v6.1.3](https://github.com/prysmaticlabs/prysm/compare/v6.1.2...v6.1.3) - 2025-10-20
 
 This release has several important beacon API and p2p fixes.

WORKSPACE

@@ -253,7 +253,7 @@ filegroup(
     url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )
 
-consensus_spec_version = "v1.6.0-beta.1"
+consensus_spec_version = "v1.6.0-beta.2"
 
 load("@prysm//tools:download_spectests.bzl", "consensus_spec_tests")
 
@@ -278,7 +278,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-yrq3tdwPS8Ri+ueeLAHssIT3ssMrX7zvHiJ8Xf9GVYs=",
+    integrity = "sha256-MForEP9dTe0z3ZkTHjX4H6waSkSTghf3gQHPwrSCCro=",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )

api/client/builder/client_test.go

@@ -10,6 +10,7 @@ import (
 	"net/url"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -22,7 +23,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 	log "github.com/sirupsen/logrus"
 )
 

api/client/builder/types_test.go

@@ -11,6 +11,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	consensusblocks "github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
@@ -22,7 +23,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func ezDecode(t *testing.T, s string) []byte {

beacon-chain/blockchain/process_block.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/blocks"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
@@ -29,7 +30,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/sirupsen/logrus"
 )
 

beacon-chain/blockchain/process_block_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/blocks"
@@ -49,7 +50,6 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	gethtypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )
 

beacon-chain/blockchain/service.go

@@ -472,8 +472,8 @@ func (s *Service) removeStartupState() {
 func (s *Service) updateCustodyInfoInDB(slot primitives.Slot) (primitives.Slot, uint64, error) {
 	isSubscribedToAllDataSubnets := flags.Get().SubscribeAllDataSubnets
 
-	beaconConfig := params.BeaconConfig()
-	custodyRequirement := beaconConfig.CustodyRequirement
+	cfg := params.BeaconConfig()
+	custodyRequirement := cfg.CustodyRequirement
 
 	// Check if the node was previously subscribed to all data subnets, and if so,
 	// store the new status accordingly.
@@ -493,7 +493,7 @@ func (s *Service) updateCustodyInfoInDB(slot primitives.Slot) (primitives.Slot,
 	// Compute the custody group count.
 	custodyGroupCount := custodyRequirement
 	if isSubscribedToAllDataSubnets {
-		custodyGroupCount = beaconConfig.NumberOfCustodyGroups
+		custodyGroupCount = cfg.NumberOfCustodyGroups
 	}
 
 	// Safely compute the fulu fork slot.
@@ -536,11 +536,11 @@ func spawnCountdownIfPreGenesis(ctx context.Context, genesisTime time.Time, db d
 }
 
 func fuluForkSlot() (primitives.Slot, error) {
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 
-	fuluForkEpoch := beaconConfig.FuluForkEpoch
-	if fuluForkEpoch == beaconConfig.FarFutureEpoch {
-		return beaconConfig.FarFutureSlot, nil
+	fuluForkEpoch := cfg.FuluForkEpoch
+	if fuluForkEpoch == cfg.FarFutureEpoch {
+		return cfg.FarFutureSlot, nil
 	}
 
 	forkFuluSlot, err := slots.EpochStart(fuluForkEpoch)

beacon-chain/blockchain/testing/mock.go

@@ -472,6 +472,36 @@ func (s *ChainService) HasBlock(ctx context.Context, rt [32]byte) bool {
 	return s.InitSyncBlockRoots[rt]
 }
 
+func (s *ChainService) AvailableBlocks(ctx context.Context, blockRoots [][32]byte) map[[32]byte]bool {
+	if s.DB == nil {
+		return nil
+	}
+
+	count := len(blockRoots)
+	availableRoots := make(map[[32]byte]bool, count)
+	notInDBRoots := make([][32]byte, 0, count)
+	for _, root := range blockRoots {
+		if s.DB.HasBlock(ctx, root) {
+			availableRoots[root] = true
+			continue
+		}
+
+		notInDBRoots = append(notInDBRoots, root)
+	}
+
+	if s.InitSyncBlockRoots == nil {
+		return availableRoots
+	}
+
+	for _, root := range notInDBRoots {
+		if s.InitSyncBlockRoots[root] {
+			availableRoots[root] = true
+		}
+	}
+
+	return availableRoots
+}
+
 // RecentBlockSlot mocks the same method in the chain service.
 func (s *ChainService) RecentBlockSlot([32]byte) (primitives.Slot, error) {
 	return s.BlockSlot, nil

beacon-chain/blockchain/weak_subjectivity_checks.go

@@ -3,6 +3,7 @@ package blockchain
 import (
 	"context"
 	"fmt"
+	"slices"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filters"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -81,12 +82,10 @@ func (v *WeakSubjectivityVerifier) VerifyWeakSubjectivity(ctx context.Context, f
 	if err != nil {
 		return errors.Wrap(err, "error while retrieving block roots to verify weak subjectivity")
 	}
-	for _, root := range roots {
-		if v.root == root {
-			log.Info("Weak subjectivity check has passed!!")
-			v.verified = true
-			return nil
-		}
+	if slices.Contains(roots, v.root) {
+		log.Info("Weak subjectivity check has passed!!")
+		v.verified = true
+		return nil
 	}
 	return errors.Wrap(errWSBlockNotFoundInEpoch, fmt.Sprintf("root=%#x, epoch=%d", v.root, v.epoch))
 }

beacon-chain/cache/attestation_test.go

@@ -3,6 +3,7 @@ package cache
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls/blst"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
@@ -10,7 +11,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestAdd(t *testing.T) {

beacon-chain/core/altair/attestation_test.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -22,7 +23,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	gofuzz "github.com/google/gofuzz"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProcessAttestations_InclusionDelayFailure(t *testing.T) {

beacon-chain/core/altair/block_test.go

@@ -4,6 +4,7 @@ import (
 	"math"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -19,7 +20,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProcessSyncCommittee_PerfectParticipation(t *testing.T) {

beacon-chain/core/altair/upgrade_test.go

@@ -3,6 +3,7 @@ package altair_test
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
@@ -12,7 +13,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestTranslateParticipation(t *testing.T) {

beacon-chain/core/blocks/attestation_regression_test.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/blocks"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -12,7 +13,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 // Beaconfuzz discovered an off by one issue where an attestation could be produced which would pass

beacon-chain/core/blocks/attestation_test.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/blocks"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -20,7 +21,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProcessAggregatedAttestation_OverlappingBits(t *testing.T) {

beacon-chain/core/epoch/precompute/attestation_test.go

@@ -3,6 +3,7 @@ package precompute_test
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/epoch/precompute"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -12,7 +13,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestUpdateValidator_Works(t *testing.T) {

beacon-chain/core/epoch/precompute/justification_finalization.go

@@ -1,6 +1,7 @@
 package precompute
 
 import (
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
@@ -8,7 +9,6 @@ import (
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 var errNilState = errors.New("nil state")

beacon-chain/core/epoch/precompute/justification_finalization_test.go

@@ -3,6 +3,7 @@ package precompute_test
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/epoch/precompute"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
@@ -12,7 +13,6 @@ import (
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProcessJustificationAndFinalizationPreCompute_ConsecutiveEpochs(t *testing.T) {

beacon-chain/core/epoch/precompute/reward_penalty_test.go

@@ -3,6 +3,7 @@ package precompute
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
@@ -16,7 +17,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProcessRewardsAndPenaltiesPrecompute(t *testing.T) {

beacon-chain/core/helpers/beacon_committee.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"sort"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
 	forkchoicetypes "github.com/OffchainLabs/prysm/v6/beacon-chain/forkchoice/types"
@@ -23,7 +24,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 var (

beacon-chain/core/helpers/beacon_committee_test.go

@@ -5,6 +5,7 @@ import (
 	"strconv"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
@@ -18,7 +19,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestComputeCommittee_WithoutCache(t *testing.T) {

beacon-chain/core/helpers/validators.go

@@ -401,7 +401,7 @@ func ComputeProposerIndex(bState state.ReadOnlyBeaconState, activeIndices []prim
 		return 0, errors.New("empty active indices list")
 	}
 	hashFunc := hash.CustomSHA256Hasher()
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 	seedBuffer := make([]byte, len(seed)+8)
 	copy(seedBuffer, seed[:])
 
@@ -426,14 +426,14 @@ func ComputeProposerIndex(bState state.ReadOnlyBeaconState, activeIndices []prim
 			offset := (i % 16) * 2
 			randomValue := uint64(randomBytes[offset]) | uint64(randomBytes[offset+1])<<8
 
-			if effectiveBal*fieldparams.MaxRandomValueElectra >= beaconConfig.MaxEffectiveBalanceElectra*randomValue {
+			if effectiveBal*fieldparams.MaxRandomValueElectra >= cfg.MaxEffectiveBalanceElectra*randomValue {
 				return candidateIndex, nil
 			}
 		} else {
 			binary.LittleEndian.PutUint64(seedBuffer[len(seed):], i/32)
 			randomByte := hashFunc(seedBuffer)[i%32]
 
-			if effectiveBal*fieldparams.MaxRandomByte >= beaconConfig.MaxEffectiveBalance*uint64(randomByte) {
+			if effectiveBal*fieldparams.MaxRandomByte >= cfg.MaxEffectiveBalance*uint64(randomByte) {
 				return candidateIndex, nil
 			}
 		}

beacon-chain/core/helpers/weak_subjectivity_test.go

@@ -285,4 +285,3 @@ func genState(t *testing.T, valCount, avgBalance uint64) state.BeaconState {
 
 	return beaconState
 }
-

beacon-chain/core/peerdas/das_core.go

@@ -89,14 +89,14 @@ func CustodyGroups(nodeId enode.ID, custodyGroupCount uint64) ([]uint64, error)
 // ComputeColumnsForCustodyGroup computes the columns for a given custody group.
 // https://github.com/ethereum/consensus-specs/blob/master/specs/fulu/das-core.md#compute_columns_for_custody_group
 func ComputeColumnsForCustodyGroup(custodyGroup uint64) ([]uint64, error) {
-	beaconConfig := params.BeaconConfig()
-	numberOfCustodyGroups := beaconConfig.NumberOfCustodyGroups
+	cfg := params.BeaconConfig()
+	numberOfCustodyGroups := cfg.NumberOfCustodyGroups
 
 	if custodyGroup >= numberOfCustodyGroups {
 		return nil, ErrCustodyGroupTooLarge
 	}
 
-	numberOfColumns := beaconConfig.NumberOfColumns
+	numberOfColumns := cfg.NumberOfColumns
 
 	columnsPerGroup := numberOfColumns / numberOfCustodyGroups
 
@@ -112,9 +112,9 @@ func ComputeColumnsForCustodyGroup(custodyGroup uint64) ([]uint64, error) {
 // ComputeCustodyGroupForColumn computes the custody group for a given column.
 // It is the reciprocal function of ComputeColumnsForCustodyGroup.
 func ComputeCustodyGroupForColumn(columnIndex uint64) (uint64, error) {
-	beaconConfig := params.BeaconConfig()
-	numberOfColumns := beaconConfig.NumberOfColumns
-	numberOfCustodyGroups := beaconConfig.NumberOfCustodyGroups
+	cfg := params.BeaconConfig()
+	numberOfColumns := cfg.NumberOfColumns
+	numberOfCustodyGroups := cfg.NumberOfCustodyGroups
 
 	if columnIndex >= numberOfColumns {
 		return 0, ErrIndexTooLarge

beacon-chain/core/peerdas/validator.go

@@ -84,10 +84,10 @@ func ValidatorsCustodyRequirement(state beaconState.ReadOnlyBeaconState, validat
 		totalNodeBalance += validator.EffectiveBalance()
 	}
 
-	beaconConfig := params.BeaconConfig()
-	numberOfCustodyGroups := beaconConfig.NumberOfCustodyGroups
-	validatorCustodyRequirement := beaconConfig.ValidatorCustodyRequirement
-	balancePerAdditionalCustodyGroup := beaconConfig.BalancePerAdditionalCustodyGroup
+	cfg := params.BeaconConfig()
+	numberOfCustodyGroups := cfg.NumberOfCustodyGroups
+	validatorCustodyRequirement := cfg.ValidatorCustodyRequirement
+	balancePerAdditionalCustodyGroup := cfg.BalancePerAdditionalCustodyGroup
 
 	count := totalNodeBalance / balancePerAdditionalCustodyGroup
 	return min(max(count, validatorCustodyRequirement), numberOfCustodyGroups), nil

beacon-chain/core/time/slot_epoch_test.go

@@ -196,7 +196,7 @@ func TestAltairCompatible(t *testing.T) {
 }
 
 func TestCanUpgradeTo(t *testing.T) {
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 
 	outerTestCases := []struct {
 		name        string
@@ -205,32 +205,32 @@ func TestCanUpgradeTo(t *testing.T) {
 	}{
 		{
 			name:        "Altair",
-			forkEpoch:   &beaconConfig.AltairForkEpoch,
+			forkEpoch:   &cfg.AltairForkEpoch,
 			upgradeFunc: time.CanUpgradeToAltair,
 		},
 		{
 			name:        "Bellatrix",
-			forkEpoch:   &beaconConfig.BellatrixForkEpoch,
+			forkEpoch:   &cfg.BellatrixForkEpoch,
 			upgradeFunc: time.CanUpgradeToBellatrix,
 		},
 		{
 			name:        "Capella",
-			forkEpoch:   &beaconConfig.CapellaForkEpoch,
+			forkEpoch:   &cfg.CapellaForkEpoch,
 			upgradeFunc: time.CanUpgradeToCapella,
 		},
 		{
 			name:        "Deneb",
-			forkEpoch:   &beaconConfig.DenebForkEpoch,
+			forkEpoch:   &cfg.DenebForkEpoch,
 			upgradeFunc: time.CanUpgradeToDeneb,
 		},
 		{
 			name:        "Electra",
-			forkEpoch:   &beaconConfig.ElectraForkEpoch,
+			forkEpoch:   &cfg.ElectraForkEpoch,
 			upgradeFunc: time.CanUpgradeToElectra,
 		},
 		{
 			name:        "Fulu",
-			forkEpoch:   &beaconConfig.FuluForkEpoch,
+			forkEpoch:   &cfg.FuluForkEpoch,
 			upgradeFunc: time.CanUpgradeToFulu,
 		},
 	}
@@ -238,7 +238,7 @@ func TestCanUpgradeTo(t *testing.T) {
 	for _, otc := range outerTestCases {
 		params.SetupTestConfigCleanup(t)
 		*otc.forkEpoch = 5
-		params.OverrideBeaconConfig(beaconConfig)
+		params.OverrideBeaconConfig(cfg)
 
 		innerTestCases := []struct {
 			name string

beacon-chain/core/transition/altair_transition_no_verify_sig_test.go

@@ -4,6 +4,7 @@ import (
 	"math"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -20,7 +21,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestExecuteAltairStateTransitionNoVerify_FullProcess(t *testing.T) {

beacon-chain/core/transition/bellatrix_transition_no_verify_sig_test.go

@@ -4,6 +4,7 @@ import (
 	"math"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -22,7 +23,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestExecuteBellatrixStateTransitionNoVerify_FullProcess(t *testing.T) {

beacon-chain/core/transition/transition_test.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/blocks"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -23,7 +24,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func init() {

beacon-chain/db/iface/interface.go

@@ -28,6 +28,7 @@ type ReadOnlyDatabase interface {
 	BlocksBySlot(ctx context.Context, slot primitives.Slot) ([]interfaces.ReadOnlySignedBeaconBlock, error)
 	BlockRootsBySlot(ctx context.Context, slot primitives.Slot) (bool, [][32]byte, error)
 	HasBlock(ctx context.Context, blockRoot [32]byte) bool
+	AvailableBlocks(ctx context.Context, blockRoots [][32]byte) map[[32]byte]bool
 	GenesisBlock(ctx context.Context) (interfaces.ReadOnlySignedBeaconBlock, error)
 	GenesisBlockRoot(ctx context.Context) ([32]byte, error)
 	IsFinalizedBlock(ctx context.Context, blockRoot [32]byte) bool

beacon-chain/db/kv/blocks.go

@@ -336,6 +336,42 @@ func (s *Store) HasBlock(ctx context.Context, blockRoot [32]byte) bool {
 	return exists
 }
 
+// AvailableBlocks returns a set of roots indicating which blocks corresponding to `blockRoots` are available in the storage.
+func (s *Store) AvailableBlocks(ctx context.Context, blockRoots [][32]byte) map[[32]byte]bool {
+	_, span := trace.StartSpan(ctx, "BeaconDB.AvailableBlocks")
+	defer span.End()
+
+	count := len(blockRoots)
+	availableRoots := make(map[[32]byte]bool, count)
+
+	// First, check the cache for each block root.
+	notInCacheRoots := make([][32]byte, 0, count)
+	for _, root := range blockRoots {
+		if v, ok := s.blockCache.Get(string(root[:])); v != nil && ok {
+			availableRoots[root] = true
+			continue
+		}
+
+		notInCacheRoots = append(notInCacheRoots, root)
+	}
+
+	// Next, check the database for the remaining block roots.
+	if err := s.db.View(func(tx *bolt.Tx) error {
+		bkt := tx.Bucket(blocksBucket)
+		for _, root := range notInCacheRoots {
+			if bkt.Get(root[:]) != nil {
+				availableRoots[root] = true
+			}
+		}
+
+		return nil
+	}); err != nil {
+		panic(err) // lint:nopanic -- View never returns an error.
+	}
+
+	return availableRoots
+}
+
 // BlocksBySlot retrieves a list of beacon blocks and its respective roots by slot.
 func (s *Store) BlocksBySlot(ctx context.Context, slot primitives.Slot) ([]interfaces.ReadOnlySignedBeaconBlock, error) {
 	ctx, span := trace.StartSpan(ctx, "BeaconDB.BlocksBySlot")

beacon-chain/db/kv/blocks_test.go

@@ -656,6 +656,44 @@ func TestStore_BlocksCRUD_NoCache(t *testing.T) {
 	}
 }
 
+func TestAvailableBlocks(t *testing.T) {
+	ctx := t.Context()
+	db := setupDB(t)
+
+	b0, b1, b2 := util.NewBeaconBlock(), util.NewBeaconBlock(), util.NewBeaconBlock()
+	b0.Block.Slot, b1.Block.Slot, b2.Block.Slot = 10, 20, 30
+
+	sb0, err := blocks.NewSignedBeaconBlock(b0)
+	require.NoError(t, err)
+	r0, err := b0.Block.HashTreeRoot()
+	require.NoError(t, err)
+
+	// Save b0 but remove it from cache.
+	err = db.SaveBlock(ctx, sb0)
+	require.NoError(t, err)
+	db.blockCache.Del(string(r0[:]))
+
+	// b1 is not saved at all.
+	r1, err := b1.Block.HashTreeRoot()
+	require.NoError(t, err)
+
+	// Save b2 in cache and DB.
+	sb2, err := blocks.NewSignedBeaconBlock(b2)
+	require.NoError(t, err)
+	r2, err := b2.Block.HashTreeRoot()
+	require.NoError(t, err)
+	require.NoError(t, db.SaveBlock(ctx, sb2))
+	require.NoError(t, err)
+
+	expected := map[[32]byte]bool{r0: true, r2: true}
+	actual := db.AvailableBlocks(ctx, [][32]byte{r0, r1, r2})
+
+	require.Equal(t, len(expected), len(actual))
+	for i := range expected {
+		require.Equal(t, true, actual[i])
+	}
+}
+
 func TestStore_Blocks_FiltersCorrectly(t *testing.T) {
 	for _, tt := range blockTests {
 		t.Run(tt.name, func(t *testing.T) {

beacon-chain/light-client/BUILD.bazel

@@ -6,6 +6,7 @@ go_library(
         "cache.go",
         "helpers.go",
         "lightclient.go",
+        "log.go",
         "store.go",
     ],
     importpath = "github.com/OffchainLabs/prysm/v6/beacon-chain/light-client",

beacon-chain/light-client/log.go

@@ -0,0 +1,5 @@
+package light_client
+
+import "github.com/sirupsen/logrus"
+
+var log = logrus.WithField("prefix", "light-client")

beacon-chain/light-client/store.go

@@ -14,7 +14,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	log "github.com/sirupsen/logrus"
 )
 
 var ErrLightClientBootstrapNotFound = errors.New("light client bootstrap not found")

beacon-chain/monitor/process_attestation_test.go

@@ -4,12 +4,12 @@ import (
 	"bytes"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/sirupsen/logrus"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

beacon-chain/monitor/process_sync_committee_test.go

@@ -3,11 +3,11 @@ package monitor
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )
 

beacon-chain/node/node.go

@@ -12,6 +12,7 @@ import (
 	"os"
 	"os/signal"
 	"path/filepath"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -1135,10 +1136,8 @@ func (b *BeaconNode) registerLightClientStore() {
 
 func hasNetworkFlag(cliCtx *cli.Context) bool {
 	for _, flag := range features.NetworkFlags {
-		for _, name := range flag.Names() {
-			if cliCtx.IsSet(name) {
-				return true
-			}
+		if slices.ContainsFunc(flag.Names(), cliCtx.IsSet) {
+			return true
 		}
 	}
 	return false

beacon-chain/operations/attestations/kv/aggregated_test.go

@@ -4,6 +4,7 @@ import (
 	"sort"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -13,7 +14,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	c "github.com/patrickmn/go-cache"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestKV_Aggregated_AggregateUnaggregatedAttestations(t *testing.T) {

beacon-chain/operations/attestations/kv/block_test.go

@@ -4,11 +4,11 @@ import (
 	"sort"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestKV_BlockAttestation_CanSaveRetrieve(t *testing.T) {

beacon-chain/operations/attestations/kv/forkchoice_test.go

@@ -4,11 +4,11 @@ import (
 	"sort"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestKV_Forkchoice_CanSaveRetrieve(t *testing.T) {

beacon-chain/operations/attestations/kv/seen_bits.go

@@ -1,11 +1,11 @@
 package kv
 
 import (
+	"github.com/OffchainLabs/go-bitfield"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
 	"github.com/patrickmn/go-cache"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func (c *AttCaches) insertSeenBit(att ethpb.Att) error {

beacon-chain/operations/attestations/kv/seen_bits_test.go

@@ -3,11 +3,11 @@ package kv
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestAttCaches_hasSeenBit(t *testing.T) {

beacon-chain/operations/attestations/kv/unaggregated_test.go

@@ -5,6 +5,7 @@ import (
 	"sort"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -13,7 +14,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	c "github.com/patrickmn/go-cache"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestKV_Unaggregated_UnaggregatedAttestations(t *testing.T) {

beacon-chain/operations/attestations/prepare_forkchoice.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/config/features"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
@@ -13,7 +14,6 @@ import (
 	attaggregation "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation/aggregation/attestations"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 // This prepares fork choice attestations by running batchForkChoiceAtts

beacon-chain/operations/attestations/prepare_forkchoice_test.go

@@ -5,13 +5,13 @@ import (
 	"sort"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	attaggregation "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation/aggregation/attestations"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 	"google.golang.org/protobuf/proto"
 )
 

beacon-chain/operations/attestations/prune_expired.go

@@ -10,11 +10,13 @@ import (
 
 // pruneExpired prunes attestations pool on every slot interval.
 func (s *Service) pruneExpired() {
-	ticker := time.NewTicker(s.cfg.pruneInterval)
-	defer ticker.Stop()
+	secondsPerSlot := params.BeaconConfig().SecondsPerSlot
+	offset := time.Duration(secondsPerSlot-1) * time.Second
+	slotTicker := slots.NewSlotTickerWithOffset(s.genesisTime, offset, secondsPerSlot)
+	defer slotTicker.Done()
 	for {
 		select {
-		case <-ticker.C:
+		case <-slotTicker.C():
 			s.pruneExpiredAtts()
 			s.updateMetrics()
 		case <-s.ctx.Done():

beacon-chain/operations/attestations/prune_expired_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/async"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -13,11 +14,12 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestPruneExpired_Ticker(t *testing.T) {
-	ctx, cancel := context.WithTimeout(t.Context(), 3*time.Second)
+	// Need timeout longer than the offset (secondsPerSlot - 1) + some buffer
+	timeout := time.Duration(params.BeaconConfig().SecondsPerSlot+5) * time.Second
+	ctx, cancel := context.WithTimeout(t.Context(), timeout)
 	defer cancel()
 
 	s, err := NewService(ctx, &Config{

beacon-chain/p2p/BUILD.bazel

@@ -15,6 +15,7 @@ go_library(
         "fork_watcher.go",
         "gossip_scoring_params.go",
         "gossip_topic_mappings.go",
+        "gossipsub_peer_crawler.go",
         "handshake.go",
         "info.go",
         "interfaces.go",
@@ -51,6 +52,7 @@ go_library(
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/db/kv:go_default_library",
         "//beacon-chain/p2p/encoder:go_default_library",
+        "//beacon-chain/p2p/gossipsubcrawler:go_default_library",
         "//beacon-chain/p2p/peers:go_default_library",
         "//beacon-chain/p2p/peers/peerdata:go_default_library",
         "//beacon-chain/p2p/peers/scorers:go_default_library",
@@ -114,6 +116,7 @@ go_library(
         "@com_github_prysmaticlabs_go_bitfield//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
         "@org_golang_google_protobuf//proto:go_default_library",
+        "@org_golang_x_sync//semaphore:go_default_library",
     ],
 )
 
@@ -129,6 +132,7 @@ go_test(
         "fork_test.go",
         "gossip_scoring_params_test.go",
         "gossip_topic_mappings_test.go",
+        "gossipsub_peer_crawler_test.go",
         "message_id_test.go",
         "options_test.go",
         "parameter_test.go",
@@ -154,6 +158,7 @@ go_test(
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/db/testing:go_default_library",
         "//beacon-chain/p2p/encoder:go_default_library",
+        "//beacon-chain/p2p/gossipsubcrawler:go_default_library",
         "//beacon-chain/p2p/peers:go_default_library",
         "//beacon-chain/p2p/peers/peerdata:go_default_library",
         "//beacon-chain/p2p/peers/scorers:go_default_library",
@@ -201,6 +206,7 @@ go_test(
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prysmaticlabs_go_bitfield//:go_default_library",
         "@com_github_sirupsen_logrus//hooks/test:go_default_library",
+        "@com_github_stretchr_testify//require:go_default_library",
         "@org_golang_google_protobuf//proto:go_default_library",
     ],
 )

beacon-chain/p2p/broadcaster.go

@@ -131,7 +131,8 @@ func (s *Service) internalBroadcastAttestation(ctx context.Context, subnet uint6
 			s.subnetLocker(subnet).Lock()
 			defer s.subnetLocker(subnet).Unlock()
 
-			if err := s.FindAndDialPeersWithSubnets(ctx, AttestationSubnetTopicFormat, forkDigest, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
+			builder := func(idx uint64) string { return attestationToTopic(idx, forkDigest) + s.Encoding().ProtocolSuffix() }
+			if err := s.FindAndDialPeersWithSubnets(ctx, builder, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
 				return errors.Wrap(err, "find peers with subnets")
 			}
 
@@ -187,7 +188,8 @@ func (s *Service) broadcastSyncCommittee(ctx context.Context, subnet uint64, sMs
 		if err := func() error {
 			s.subnetLocker(wrappedSubIdx).Lock()
 			defer s.subnetLocker(wrappedSubIdx).Unlock()
-			if err := s.FindAndDialPeersWithSubnets(ctx, SyncCommitteeSubnetTopicFormat, forkDigest, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
+			builder := func(idx uint64) string { return syncCommitteeToTopic(idx, forkDigest) + s.Encoding().ProtocolSuffix() }
+			if err := s.FindAndDialPeersWithSubnets(ctx, builder, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
 				return errors.Wrap(err, "find peers with subnets")
 			}
 
@@ -252,7 +254,8 @@ func (s *Service) internalBroadcastBlob(ctx context.Context, subnet uint64, blob
 			s.subnetLocker(wrappedSubIdx).Lock()
 			defer s.subnetLocker(wrappedSubIdx).Unlock()
 
-			if err := s.FindAndDialPeersWithSubnets(ctx, BlobSubnetTopicFormat, forkDigest, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
+			builder := func(idx uint64) string { return blobSubnetToTopic(idx, forkDigest) + s.Encoding().ProtocolSuffix() }
+			if err := s.FindAndDialPeersWithSubnets(ctx, builder, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
 				return errors.Wrap(err, "find peers with subnets")
 			}
 
@@ -392,7 +395,10 @@ func (s *Service) broadcastDataColumnSidecars(ctx context.Context, forkDigest [f
 			wrappedSubIdx := subnet + dataColumnSubnetVal
 
 			// Find peers if needed.
-			if err := s.findPeersIfNeeded(ctx, wrappedSubIdx, DataColumnSubnetTopicFormat, forkDigest, subnet); err != nil {
+			builder := func(idx uint64) string {
+				return dataColumnSubnetToTopic(idx, forkDigest) + s.Encoding().ProtocolSuffix()
+			}
+			if err := s.findPeersIfNeeded(ctx, wrappedSubIdx, builder, subnet); err != nil {
 				tracing.AnnotateError(span, err)
 				log.WithError(err).Error("Cannot find peers if needed")
 				return
@@ -487,8 +493,7 @@ func (s *Service) broadcastDataColumnSidecars(ctx context.Context, forkDigest [f
 func (s *Service) findPeersIfNeeded(
 	ctx context.Context,
 	wrappedSubIdx uint64,
-	topicFormat string,
-	forkDigest [fieldparams.VersionLength]byte,
+	fullTopicForSubnet func(uint64) string,
 	subnet uint64,
 ) error {
 	// Sending a data column sidecar to only one peer is not ideal,
@@ -497,7 +502,7 @@ func (s *Service) findPeersIfNeeded(
 	defer s.subnetLocker(wrappedSubIdx).Unlock()
 
 	// No peers found, attempt to find peers with this subnet.
-	if err := s.FindAndDialPeersWithSubnets(ctx, topicFormat, forkDigest, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
+	if err := s.FindAndDialPeersWithSubnets(ctx, fullTopicForSubnet, minimumPeersPerSubnetForBroadcast, map[uint64]bool{subnet: true}); err != nil {
 		return errors.Wrap(err, "find peers with subnet")
 	}
 

beacon-chain/p2p/broadcaster_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
@@ -31,7 +32,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	"github.com/libp2p/go-libp2p/core/host"
-	"github.com/prysmaticlabs/go-bitfield"
 	"google.golang.org/protobuf/proto"
 )
 

beacon-chain/p2p/config.go

@@ -7,6 +7,7 @@ import (
 	statefeed "github.com/OffchainLabs/prysm/v6/beacon-chain/core/feed/state"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
+	"github.com/sirupsen/logrus"
 )
 
 // This is the default queue size used if we have specified an invalid one.
@@ -63,12 +64,17 @@ func (cfg *Config) connManagerLowHigh() (int, int) {
 	return low, high
 }
 
-// validateConfig validates whether the values provided are accurate and will set
-// the appropriate values for those that are invalid.
-func validateConfig(cfg *Config) *Config {
-	if cfg.QueueSize == 0 {
-		log.Warnf("Invalid pubsub queue size of %d initialized, setting the quese size as %d instead", cfg.QueueSize, defaultPubsubQueueSize)
-		cfg.QueueSize = defaultPubsubQueueSize
+// validateConfig validates whether the provided config has valid values and sets
+// the invalid ones to default.
+func validateConfig(cfg *Config) {
+	if cfg.QueueSize > 0 {
+		return
 	}
-	return cfg
+
+	log.WithFields(logrus.Fields{
+		"queueSize": cfg.QueueSize,
+		"default":   defaultPubsubQueueSize,
+	}).Warning("Invalid pubsub queue size, setting the queue size to the default value")
+
+	cfg.QueueSize = defaultPubsubQueueSize
 }

beacon-chain/p2p/custody.go

@@ -259,11 +259,11 @@ func (s *Service) custodyGroupCountFromPeerENR(pid peer.ID) uint64 {
 }
 
 func fuluForkSlot() (primitives.Slot, error) {
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 
-	fuluForkEpoch := beaconConfig.FuluForkEpoch
-	if fuluForkEpoch == beaconConfig.FarFutureEpoch {
-		return beaconConfig.FarFutureSlot, nil
+	fuluForkEpoch := cfg.FuluForkEpoch
+	if fuluForkEpoch == cfg.FarFutureEpoch {
+		return cfg.FarFutureSlot, nil
 	}
 
 	forkFuluSlot, err := slots.EpochStart(fuluForkEpoch)

beacon-chain/p2p/discovery.go

@@ -9,6 +9,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v6/cmd/beacon-chain/flags"
@@ -24,7 +25,6 @@ import (
 	"github.com/libp2p/go-libp2p/core/peer"
 	ma "github.com/multiformats/go-multiaddr"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/sirupsen/logrus"
 )
 
@@ -554,6 +554,7 @@ func (s *Service) createListener(
 		Bootnodes:               bootNodes,
 		PingInterval:            s.cfg.PingInterval,
 		NoFindnodeLivenessCheck: s.cfg.DisableLivenessCheck,
+		V5RespTimeout:           300 * time.Millisecond,
 	}
 
 	listener, err := discover.ListenV5(conn, localNode, dv5Cfg)

beacon-chain/p2p/discovery_test.go

@@ -16,6 +16,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
 	testDB "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
@@ -41,7 +42,6 @@ import (
 	"github.com/libp2p/go-libp2p/core/host"
 	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/peer"
-	"github.com/prysmaticlabs/go-bitfield"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )
 

beacon-chain/p2p/gossip_scoring_params.go

@@ -2,6 +2,7 @@ package p2p
 
 import (
 	"context"
+	"fmt"
 	"math"
 	"net"
 	"reflect"
@@ -106,18 +107,26 @@ func peerScoringParams(colocationWhitelist []*net.IPNet) (*pubsub.PeerScoreParam
 }
 
 func (s *Service) topicScoreParams(topic string) (*pubsub.TopicScoreParams, error) {
-	activeValidators, err := s.retrieveActiveValidators()
-	if err != nil {
-		return nil, err
-	}
 	switch {
 	case strings.Contains(topic, GossipBlockMessage):
 		return defaultBlockTopicParams(), nil
 	case strings.Contains(topic, GossipAggregateAndProofMessage):
+		activeValidators, err := s.retrieveActiveValidators()
+		if err != nil {
+			return nil, fmt.Errorf("failed to compute active validator count for topic %s: %w", GossipAggregateAndProofMessage, err)
+		}
 		return defaultAggregateTopicParams(activeValidators), nil
 	case strings.Contains(topic, GossipAttestationMessage):
+		activeValidators, err := s.retrieveActiveValidators()
+		if err != nil {
+			return nil, fmt.Errorf("failed to compute active validator count for topic %s: %w", GossipAttestationMessage, err)
+		}
 		return defaultAggregateSubnetTopicParams(activeValidators), nil
 	case strings.Contains(topic, GossipSyncCommitteeMessage):
+		activeValidators, err := s.retrieveActiveValidators()
+		if err != nil {
+			return nil, fmt.Errorf("failed to compute active validator count for topic %s: %w", GossipSyncCommitteeMessage, err)
+		}
 		return defaultSyncSubnetTopicParams(activeValidators), nil
 	case strings.Contains(topic, GossipContributionAndProofMessage):
 		return defaultSyncContributionTopicParams(), nil
@@ -142,6 +151,8 @@ func (s *Service) topicScoreParams(topic string) (*pubsub.TopicScoreParams, erro
 }
 
 func (s *Service) retrieveActiveValidators() (uint64, error) {
+	s.activeValidatorCountLock.Lock()
+	defer s.activeValidatorCountLock.Unlock()
 	if s.activeValidatorCount != 0 {
 		return s.activeValidatorCount, nil
 	}

beacon-chain/p2p/gossipsub_peer_crawler.go

@@ -0,0 +1,511 @@
+package p2p
+
+import (
+	"context"
+	"sort"
+	"sync"
+	"time"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
+	"github.com/pkg/errors"
+	"golang.org/x/sync/semaphore"
+
+	"github.com/libp2p/go-libp2p/core/peer"
+
+	"github.com/ethereum/go-ethereum/p2p/enode"
+)
+
+type peerNode struct {
+	id       enode.ID
+	isPinged bool
+	node     *enode.Node
+	peerID   peer.ID
+	topics   map[gossipsubcrawler.Topic]struct{}
+}
+
+type crawledPeers struct {
+	g *GossipsubPeerCrawler
+
+	mu       sync.RWMutex
+	byEnode  map[enode.ID]*peerNode
+	byPeerId map[peer.ID]*peerNode
+	byTopic  map[gossipsubcrawler.Topic]map[peer.ID]struct{}
+}
+
+func (cp *crawledPeers) updateStatusToPinged(enodeID enode.ID) {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+
+	existingPNode, ok := cp.byEnode[enodeID]
+	if !ok {
+		return
+	}
+
+	// we only want to ping a node with a given NodeId once -> not on every sequence number change
+	// as ping is simply a test of a node being reachable and not fake
+	existingPNode.isPinged = true
+}
+
+func (cp *crawledPeers) removePeerOnPingFailure(enodeID enode.ID) {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+
+	existingPNode, ok := cp.byEnode[enodeID]
+	if !ok {
+		return
+	}
+
+	// same idea as in "updateStatusToPinged" above.
+	// We don't want to test pings for every sequence number change for a given node as that
+	// can lead to an explosion in the number of pings the crawler needs to do.
+	// So, remove the peer when the first ping fails. If the node becomes reachable later,
+	// we will discover it during a re-crawl and ping it again to test for reachability.
+	// we're not blacklisting this peer anyways.
+	cp.updateTopicsUnlocked(existingPNode, nil)
+}
+
+func (cp *crawledPeers) updateCrawledIfNewer(node *enode.Node, topics []string) {
+	cp.mu.Lock()
+
+	enodeID := node.ID()
+	existingPNode, ok := cp.byEnode[enodeID]
+
+	if ok && existingPNode.node == nil {
+		log.WithField("enodeId", enodeID).Error("enode is nil for enodeId")
+		cp.mu.Unlock()
+		return
+	}
+
+	// we don't want to update enodes with a lower sequence number as they're stale records
+	if ok && existingPNode.node.Seq() >= node.Seq() {
+		cp.mu.Unlock()
+		return
+	}
+
+	if !ok {
+		// this is a new peer
+		peerID, err := enodeToPeerID(node)
+		if err != nil {
+			log.WithError(err).WithField("node", node.ID()).Debug("Failed to convert enode to peer ID")
+			cp.mu.Unlock()
+			return
+		}
+		existingPNode = &peerNode{
+			id:     enodeID,
+			node:   node,
+			peerID: peerID,
+			topics: make(map[gossipsubcrawler.Topic]struct{}),
+		}
+		cp.byEnode[enodeID] = existingPNode
+		cp.byPeerId[peerID] = existingPNode
+	} else {
+		existingPNode.node = node
+	}
+
+	cp.updateTopicsUnlocked(existingPNode, topics)
+
+	if existingPNode.isPinged || len(topics) == 0 {
+		cp.mu.Unlock()
+		return
+	}
+	cp.mu.Unlock()
+
+	select {
+	case cp.g.pingCh <- *node:
+	case <-cp.g.ctx.Done():
+		return
+	}
+}
+
+func (cp *crawledPeers) removeTopic(topic gossipsubcrawler.Topic) {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+
+	// Get all peers subscribed to this topic
+	peers, ok := cp.byTopic[topic]
+	if !ok {
+		return // Topic doesn't exist
+	}
+
+	// Remove the topic from each peer's topic list
+	for peerID := range peers {
+		if pnode, exists := cp.byPeerId[peerID]; exists {
+			delete(pnode.topics, topic)
+			// remove the peer if it has no more topics left
+			if len(pnode.topics) == 0 {
+				cp.updateTopicsUnlocked(pnode, nil)
+			}
+		}
+	}
+
+	// Remove the topic from byTopic map
+	delete(cp.byTopic, topic)
+}
+
+func (cp *crawledPeers) removePeerId(peerID peer.ID) {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+
+	pnode, exists := cp.byPeerId[peerID]
+	if !exists {
+		return
+	}
+
+	// Use updateTopicsUnlocked with empty topics to remove the peer
+	cp.updateTopicsUnlocked(pnode, nil)
+}
+
+func (cp *crawledPeers) removePeer(enodeID enode.ID) {
+	cp.mu.Lock()
+	defer cp.mu.Unlock()
+	pnode, exists := cp.byEnode[enodeID]
+	if !exists {
+		return
+	}
+	cp.updateTopicsUnlocked(pnode, nil)
+}
+
+// setting topics to empty will remove the peer completely.
+func (cp *crawledPeers) updateTopicsUnlocked(pnode *peerNode, topics []string) {
+	// If topics is empty, remove the peer completely.
+	if len(topics) == 0 {
+		delete(cp.byPeerId, pnode.peerID)
+		delete(cp.byEnode, pnode.id)
+		for t := range pnode.topics {
+			if peers, ok := cp.byTopic[t]; ok {
+				delete(peers, pnode.peerID)
+				if len(peers) == 0 {
+					delete(cp.byTopic, t)
+				}
+			}
+		}
+		pnode.topics = nil // Clear topics to indicate removal.
+		return
+	}
+
+	newTopics := make(map[gossipsubcrawler.Topic]struct{})
+	for _, t := range topics {
+		newTopics[gossipsubcrawler.Topic(t)] = struct{}{}
+	}
+
+	// Remove old topics that are no longer present.
+	for oldTopic := range pnode.topics {
+		if _, exists := newTopics[oldTopic]; !exists {
+			if peers, ok := cp.byTopic[oldTopic]; ok {
+				delete(peers, pnode.peerID)
+				if len(peers) == 0 {
+					delete(cp.byTopic, oldTopic)
+				}
+			}
+		}
+	}
+
+	// Add new topics.
+	for newTopic := range newTopics {
+		if _, exists := pnode.topics[newTopic]; !exists {
+			if _, ok := cp.byTopic[newTopic]; !ok {
+				cp.byTopic[newTopic] = make(map[peer.ID]struct{})
+			}
+			cp.byTopic[newTopic][pnode.peerID] = struct{}{}
+		}
+	}
+	pnode.topics = newTopics
+}
+
+type GossipsubPeerCrawler struct {
+	ctx    context.Context
+	cancel context.CancelFunc
+
+	crawlInterval time.Duration
+	crawlTimeout  time.Duration
+
+	crawledPeers *crawledPeers
+
+	// Discovery interface for finding peers
+	dv5 ListenerRebooter
+
+	service *Service
+
+	topicExtractor gossipsubcrawler.TopicExtractor
+
+	peerFilter gossipsubcrawler.PeerFilterFunc
+	scorer     PeerScoreFunc
+
+	maxConcurrentPings int
+	pingCh             chan enode.Node
+	pingSemaphore      *semaphore.Weighted
+
+	wg   sync.WaitGroup
+	once sync.Once
+}
+
+// cleanupInterval controls how frequently we sweep crawled peers and prune
+// those that are no longer useful.
+const cleanupInterval = 5 * time.Minute
+
+// PeerScoreFunc provides a way to calculate a score for a given peer ID.
+// Higher scores should indicate better peers.
+type PeerScoreFunc func(peer.ID) float64
+
+func NewGossipsubPeerCrawler(
+	service *Service,
+	dv5 ListenerRebooter,
+	crawlTimeout time.Duration,
+	crawlInterval time.Duration,
+	maxConcurrentPings int,
+	peerFilter gossipsubcrawler.PeerFilterFunc,
+	scorer PeerScoreFunc,
+) (*GossipsubPeerCrawler, error) {
+	if service == nil {
+		return nil, errors.New("service is nil")
+	}
+	if dv5 == nil {
+		return nil, errors.New("dv5 is nil")
+	}
+	if crawlTimeout <= 0 {
+		return nil, errors.New("crawl timeout must be greater than 0")
+	}
+	if crawlInterval <= 0 {
+		return nil, errors.New("crawl interval must be greater than 0")
+	}
+	if maxConcurrentPings <= 0 {
+		return nil, errors.New("max concurrent pings must be greater than 0")
+	}
+	if peerFilter == nil {
+		return nil, errors.New("peer filter is nil")
+	}
+	if scorer == nil {
+		return nil, errors.New("peer scorer is nil")
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	g := &GossipsubPeerCrawler{
+		ctx:                ctx,
+		cancel:             cancel,
+		crawlInterval:      crawlInterval,
+		crawlTimeout:       crawlTimeout,
+		service:            service,
+		dv5:                dv5,
+		maxConcurrentPings: maxConcurrentPings,
+		peerFilter:         peerFilter,
+		scorer:             scorer,
+	}
+	g.pingCh = make(chan enode.Node, 4*g.maxConcurrentPings)
+	g.pingSemaphore = semaphore.NewWeighted(int64(g.maxConcurrentPings))
+	g.crawledPeers = &crawledPeers{
+		g:        g,
+		byEnode:  make(map[enode.ID]*peerNode),
+		byPeerId: make(map[peer.ID]*peerNode),
+		byTopic:  make(map[gossipsubcrawler.Topic]map[peer.ID]struct{}),
+	}
+	return g, nil
+}
+
+func (g *GossipsubPeerCrawler) PeersForTopic(topic gossipsubcrawler.Topic) []*enode.Node {
+	g.crawledPeers.mu.RLock()
+	defer g.crawledPeers.mu.RUnlock()
+
+	peerIDs, ok := g.crawledPeers.byTopic[topic]
+	if !ok {
+		return nil
+	}
+
+	var peerNodes []*peerNode
+	for peerID := range peerIDs {
+		peerNode, ok := g.crawledPeers.byPeerId[peerID]
+		if !ok {
+			continue
+		}
+		if peerNode.isPinged && g.peerFilter(peerNode.node) {
+			peerNodes = append(peerNodes, peerNode)
+		}
+	}
+
+	// Sort peerNodes in descending order of their scores.
+	sort.Slice(peerNodes, func(i, j int) bool {
+		scoreI := g.scorer(peerNodes[i].peerID)
+		scoreJ := g.scorer(peerNodes[j].peerID)
+		return scoreI > scoreJ
+	})
+
+	nodes := make([]*enode.Node, len(peerNodes))
+	for i, pn := range peerNodes {
+		nodes[i] = pn.node
+	}
+
+	return nodes
+}
+
+func (g *GossipsubPeerCrawler) RemovePeerId(peerID peer.ID) {
+	g.crawledPeers.removePeerId(peerID)
+}
+
+func (g *GossipsubPeerCrawler) RemoveTopic(topic gossipsubcrawler.Topic) {
+	g.crawledPeers.removeTopic(topic)
+}
+
+// Start runs the crawler's loops in the background.
+func (g *GossipsubPeerCrawler) Start(te gossipsubcrawler.TopicExtractor) error {
+	if te == nil {
+		return errors.New("topic extractor is nil")
+	}
+	g.once.Do(func() {
+		g.topicExtractor = te
+		g.wg.Go(func() {
+			g.crawlLoop()
+		})
+		g.wg.Go(func() {
+			g.pingLoop()
+		})
+		g.wg.Go(func() {
+			g.cleanupLoop()
+		})
+	})
+
+	return nil
+}
+
+// Stop terminates the crawler.
+func (g *GossipsubPeerCrawler) Stop() {
+	g.cancel()
+	g.wg.Wait()
+}
+
+func (g *GossipsubPeerCrawler) pingLoop() {
+	for {
+		select {
+		case node := <-g.pingCh:
+			if err := g.pingSemaphore.Acquire(g.ctx, 1); err != nil {
+				return // Context cancelled, exit loop.
+			}
+			go func(node *enode.Node) {
+				defer g.pingSemaphore.Release(1)
+
+				if err := g.dv5.Ping(node); err != nil {
+					g.crawledPeers.removePeerOnPingFailure(node.ID())
+					return
+				}
+
+				g.crawledPeers.updateStatusToPinged(node.ID())
+			}(&node)
+
+		case <-g.ctx.Done():
+			return
+		}
+	}
+}
+
+func (g *GossipsubPeerCrawler) crawlLoop() {
+	ticker := time.NewTicker(g.crawlInterval)
+	defer ticker.Stop()
+
+	g.crawl()
+	for {
+		select {
+		case <-ticker.C:
+			g.crawl()
+		case <-g.ctx.Done():
+			return
+		}
+	}
+}
+
+func (g *GossipsubPeerCrawler) crawl() {
+	ctx, cancel := context.WithTimeout(g.ctx, g.crawlTimeout)
+	defer cancel()
+
+	iterator := g.dv5.RandomNodes()
+
+	// Ensure iterator unblocks on context cancellation or timeout
+	go func() {
+		<-ctx.Done()
+		iterator.Close()
+	}()
+
+	for iterator.Next() {
+		if ctx.Err() != nil {
+			return
+		}
+
+		node := iterator.Node()
+		if node == nil {
+			continue
+		}
+
+		if !g.peerFilter(node) {
+			g.crawledPeers.removePeer(node.ID())
+			continue
+		}
+
+		topics, err := g.topicExtractor(ctx, node)
+		if err != nil {
+			log.WithError(err).WithField("node", node.ID()).Debug("Failed to extract topics, skipping")
+			continue
+		}
+
+		g.crawledPeers.updateCrawledIfNewer(node, topics)
+	}
+}
+
+// cleanupLoop periodically removes peers that the filter rejects or that
+// have no topics of interest. It uses the same context lifecycle as other
+// background loops.
+func (g *GossipsubPeerCrawler) cleanupLoop() {
+	ticker := time.NewTicker(cleanupInterval)
+	defer ticker.Stop()
+
+	// Initial cleanup to catch any leftovers from startup state
+	g.cleanup()
+
+	for {
+		select {
+		case <-ticker.C:
+			g.cleanup()
+		case <-g.ctx.Done():
+			return
+		}
+	}
+}
+
+// cleanup scans the crawled peer set and removes entries that either fail
+// the current peer filter or have no topics of interest remaining.
+func (g *GossipsubPeerCrawler) cleanup() {
+	cp := g.crawledPeers
+
+	// Snapshot current peers to evaluate without holding the lock during
+	// filter and topic extraction.
+	cp.mu.RLock()
+	peers := make([]*peerNode, 0, len(cp.byPeerId))
+	for _, p := range cp.byPeerId {
+		peers = append(peers, p)
+	}
+	cp.mu.RUnlock()
+
+	for _, p := range peers {
+		p := p
+
+		// Remove peers that no longer pass the filter
+		if !g.peerFilter(p.node) {
+			cp.removePeer(p.id)
+			continue
+		}
+
+		// Re-extract topics; if the extractor errors or yields none, drop the peer.
+		topics, err := g.topicExtractor(g.ctx, p.node)
+		if err != nil || len(topics) == 0 {
+			cp.removePeer(p.id)
+		}
+	}
+}
+
+// enodeToPeerID converts an enode record to a peer ID.
+func enodeToPeerID(n *enode.Node) (peer.ID, error) {
+	info, _, err := convertToAddrInfo(n)
+	if err != nil {
+		return "", err
+	}
+	if info == nil {
+		return "", errors.New("peer info is nil")
+	}
+	return info.ID, nil
+}

beacon-chain/p2p/gossipsub_peer_crawler_test.go

@@ -0,0 +1,781 @@
+package p2p
+
+import (
+	"context"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
+	p2ptest "github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/testing"
+	"github.com/ethereum/go-ethereum/p2p/enode"
+	"github.com/libp2p/go-libp2p/core/peer"
+	"github.com/stretchr/testify/require"
+)
+
+// Helpers for crawledPeers tests
+func newTestCrawledPeers() *crawledPeers {
+	return &crawledPeers{
+		byEnode:  make(map[enode.ID]*peerNode),
+		byPeerId: make(map[peer.ID]*peerNode),
+		byTopic:  make(map[gossipsubcrawler.Topic]map[peer.ID]struct{}),
+	}
+}
+
+func addPeerWithTopics(t *testing.T, cp *crawledPeers, node *enode.Node, topics []string, pinged bool) *peerNode {
+	t.Helper()
+	pid, err := enodeToPeerID(node)
+	require.NoError(t, err)
+	p := &peerNode{
+		id:       node.ID(),
+		isPinged: pinged,
+		node:     node,
+		peerID:   pid,
+		topics:   make(map[gossipsubcrawler.Topic]struct{}),
+	}
+	cp.mu.Lock()
+	cp.byEnode[p.id] = p
+	cp.byPeerId[p.peerID] = p
+	cp.updateTopicsUnlocked(p, topics)
+	cp.mu.Unlock()
+	return p
+}
+
+func TestUpdateStatusToPinged(t *testing.T) {
+	localNode := createTestNodeRandom(t)
+	node1 := localNode.Node()
+	localNode2 := createTestNodeRandom(t)
+	node2 := localNode2.Node()
+
+	cases := []struct {
+		name         string
+		prep         func(*crawledPeers)
+		target       *enode.Node
+		expectPinged map[enode.ID]bool
+	}{
+		{
+			name: "sets pinged for existing peer",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"a"}, false)
+			},
+			target: node1,
+			expectPinged: map[enode.ID]bool{
+				node1.ID(): true,
+			},
+		},
+		{
+			name: "idempotent when already pinged",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"a"}, true)
+			},
+			target: node1,
+			expectPinged: map[enode.ID]bool{
+				node1.ID(): true,
+			},
+		},
+		{
+			name: "no change when peer missing",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"a"}, false)
+			},
+			target: node2,
+			expectPinged: map[enode.ID]bool{
+				node1.ID(): false,
+			},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			cp := newTestCrawledPeers()
+			tc.prep(cp)
+			cp.updateStatusToPinged(tc.target.ID())
+			cp.mu.RLock()
+			defer cp.mu.RUnlock()
+			for id, exp := range tc.expectPinged {
+				if p := cp.byEnode[id]; p != nil {
+					require.Equal(t, exp, p.isPinged)
+				}
+			}
+		})
+	}
+}
+
+func TestRemovePeerOnPingFailure(t *testing.T) {
+	localNode := createTestNodeRandom(t)
+	node1 := localNode.Node()
+	localNode2 := createTestNodeRandom(t)
+	node2 := localNode2.Node()
+
+	cases := []struct {
+		name     string
+		prep     func(*crawledPeers)
+		target   *enode.Node
+		wantLeft int // peers left byPeerId
+		check    func(*testing.T, *crawledPeers)
+	}{
+		{
+			name: "removes existing peer and prunes sole topic",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+			},
+			target:   node1,
+			wantLeft: 0,
+			check: func(t *testing.T, cp *crawledPeers) {
+				_, ok := cp.byTopic[gossipsubcrawler.Topic("t1")]
+				require.False(t, ok, "topic should be pruned when empty")
+			},
+		},
+		{
+			name: "removes only target peer, keeps topic for others",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+				addPeerWithTopics(t, cp, node2, []string{"t1"}, true)
+			},
+			target:   node1,
+			wantLeft: 1,
+			check: func(t *testing.T, cp *crawledPeers) {
+				peers := cp.byTopic[gossipsubcrawler.Topic("t1")]
+				require.Len(t, peers, 1)
+			},
+		},
+		{
+			name: "no-op when peer missing",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+			},
+			target:   node2,
+			wantLeft: 1,
+			check:    func(t *testing.T, cp *crawledPeers) {},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			cp := newTestCrawledPeers()
+			tc.prep(cp)
+			cp.removePeerOnPingFailure(tc.target.ID())
+			cp.mu.RLock()
+			defer cp.mu.RUnlock()
+			require.Len(t, cp.byPeerId, tc.wantLeft)
+			tc.check(t, cp)
+		})
+	}
+}
+
+func TestRemoveTopic(t *testing.T) {
+	localNode := createTestNodeRandom(t)
+	node1 := localNode.Node()
+	localNode2 := createTestNodeRandom(t)
+	node2 := localNode2.Node()
+
+	topic1 := gossipsubcrawler.Topic("t1")
+	topic2 := gossipsubcrawler.Topic("t2")
+
+	cases := []struct {
+		name  string
+		prep  func(*crawledPeers)
+		topic gossipsubcrawler.Topic
+		check func(*testing.T, *crawledPeers)
+	}{
+		{
+			name: "removes topic from all peers and index",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1", "t2"}, true)
+				addPeerWithTopics(t, cp, node2, []string{"t1"}, true)
+			},
+			topic: topic1,
+			check: func(t *testing.T, cp *crawledPeers) {
+				_, ok := cp.byTopic[topic1]
+				require.False(t, ok)
+				for _, p := range cp.byPeerId {
+					_, has := p.topics[topic1]
+					require.False(t, has)
+				}
+				// Ensure other topics remain
+				_, ok = cp.byTopic[topic2]
+				require.True(t, ok)
+			},
+		},
+		{
+			name: "no-op when topic missing",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t2"}, true)
+			},
+			topic: topic1,
+			check: func(t *testing.T, cp *crawledPeers) {
+				_, ok := cp.byTopic[topic2]
+				require.True(t, ok)
+			},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			cp := newTestCrawledPeers()
+			tc.prep(cp)
+			cp.removeTopic(tc.topic)
+			tc.check(t, cp)
+		})
+	}
+}
+
+func TestRemovePeer(t *testing.T) {
+	localNode := createTestNodeRandom(t)
+	node1 := localNode.Node()
+	localNode2 := createTestNodeRandom(t)
+	node2 := localNode2.Node()
+
+	cases := []struct {
+		name       string
+		prep       func(*crawledPeers)
+		target     enode.ID
+		wantTopics int
+	}{
+		{
+			name: "removes existing peer and prunes empty topic",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+			},
+			target:     node1.ID(),
+			wantTopics: 0,
+		},
+		{
+			name: "removes only targeted peer; keeps topic for other",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+				addPeerWithTopics(t, cp, node2, []string{"t1"}, true)
+			},
+			target:     node1.ID(),
+			wantTopics: 1, // byTopic should still have t1 with one peer
+		},
+		{
+			name: "no-op when peer missing",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+			},
+			target:     node2.ID(),
+			wantTopics: 1,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			cp := newTestCrawledPeers()
+			tc.prep(cp)
+			cp.removePeer(tc.target)
+			cp.mu.RLock()
+			defer cp.mu.RUnlock()
+			require.Len(t, cp.byTopic, tc.wantTopics)
+		})
+	}
+}
+
+func TestRemovePeerId(t *testing.T) {
+	localNode := createTestNodeRandom(t)
+	node1 := localNode.Node()
+	localNode2 := createTestNodeRandom(t)
+	node2 := localNode2.Node()
+
+	pid1, err := enodeToPeerID(node1)
+	require.NoError(t, err)
+	pid2, err := enodeToPeerID(node2)
+	require.NoError(t, err)
+
+	cases := []struct {
+		name       string
+		prep       func(*crawledPeers)
+		target     peer.ID
+		wantTopics int
+		wantPeers  int
+	}{
+		{
+			name: "removes existing peer by id and prunes topic",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+			},
+			target:     pid1,
+			wantTopics: 0,
+			wantPeers:  0,
+		},
+		{
+			name: "removes only targeted peer id; keeps topic for other",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+				addPeerWithTopics(t, cp, node2, []string{"t1"}, true)
+			},
+			target:     pid1,
+			wantTopics: 1,
+			wantPeers:  1,
+		},
+		{
+			name: "no-op when peer id missing",
+			prep: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, node1, []string{"t1"}, true)
+			},
+			target:     pid2,
+			wantTopics: 1,
+			wantPeers:  1,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			cp := newTestCrawledPeers()
+			tc.prep(cp)
+			cp.removePeerId(tc.target)
+			cp.mu.RLock()
+			defer cp.mu.RUnlock()
+			require.Len(t, cp.byTopic, tc.wantTopics)
+			require.Len(t, cp.byPeerId, tc.wantPeers)
+		})
+	}
+}
+
+func TestUpdateCrawledIfNewer(t *testing.T) {
+	newCrawler := func() (*crawledPeers, *GossipsubPeerCrawler, func()) {
+		ctx, cancel := context.WithCancel(context.Background())
+		g := &GossipsubPeerCrawler{
+			ctx:    ctx,
+			cancel: cancel,
+			pingCh: make(chan enode.Node, 8),
+		}
+		cp := newTestCrawledPeers()
+		cp.g = g
+		return cp, g, cancel
+	}
+
+	// Helper: non-blocking receive from ping channel
+	recvPing := func(ch <-chan enode.Node) (enode.Node, bool) {
+		select {
+		case n := <-ch:
+			return n, true
+		default:
+			return enode.Node{}, false
+		}
+	}
+
+	// Helper: local node that will cause enodeToPeerID to fail (no TCP/UDP multiaddrs)
+	newNodeNoPorts := func(t *testing.T) *enode.Node {
+		_, privKey := createAddrAndPrivKey(t)
+		db, err := enode.OpenDB("")
+		require.NoError(t, err)
+		t.Cleanup(func() { db.Close() })
+		ln := enode.NewLocalNode(db, privKey)
+		// Do not set TCP/UDP; keep only IP
+		ln.SetStaticIP(net.ParseIP("127.0.0.1"))
+		return ln.Node()
+	}
+
+	// Ensure both A nodes have the same enode.ID but differing seq
+	ln := createTestNodeRandom(t)
+	nodeA1 := ln.Node()
+	setNodeSeq(ln, nodeA1.Seq()+1)
+	nodeA2 := ln.Node()
+
+	tests := []struct {
+		name         string
+		arrange      func(*crawledPeers)
+		invokeNode   *enode.Node
+		invokeTopics []string
+		assert       func(*testing.T, *crawledPeers, <-chan enode.Node)
+	}{
+		{
+			name:         "new peer with topics adds and pings once",
+			arrange:      func(cp *crawledPeers) {},
+			invokeNode:   nodeA1,
+			invokeTopics: []string{"a"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Len(t, cp.byEnode, 1)
+				require.Len(t, cp.byPeerId, 1)
+				require.Contains(t, cp.byTopic, gossipsubcrawler.Topic("a"))
+				cp.mu.RUnlock()
+				if n, ok := recvPing(ch); !ok || n.ID() != nodeA1.ID() {
+					t.Fatalf("expected one ping for nodeA1")
+				}
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("expected exactly one ping")
+				}
+			},
+		},
+		{
+			name:         "new peer with empty topics is removed and not pinged",
+			arrange:      func(cp *crawledPeers) {},
+			invokeNode:   nodeA1,
+			invokeTopics: nil,
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Empty(t, cp.byEnode)
+				require.Empty(t, cp.byPeerId)
+				require.Empty(t, cp.byTopic)
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping when topics empty")
+				}
+			},
+		},
+		{
+			name: "existing peer lower seq is ignored (no update, no ping)",
+			arrange: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, nodeA2, []string{"x"}, false) // higher seq exists
+			},
+			invokeNode:   nodeA1, // lower seq
+			invokeTopics: []string{"a", "b"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Contains(t, cp.byTopic, gossipsubcrawler.Topic("x"))
+				require.NotContains(t, cp.byTopic, gossipsubcrawler.Topic("a"))
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping for lower/equal seq")
+				}
+			},
+		},
+		{
+			name: "existing peer equal seq is ignored (no update, no ping)",
+			arrange: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, nodeA1, []string{"x"}, false)
+			},
+			invokeNode:   nodeA1,
+			invokeTopics: []string{"a"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Contains(t, cp.byTopic, gossipsubcrawler.Topic("x"))
+				require.NotContains(t, cp.byTopic, gossipsubcrawler.Topic("a"))
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping for equal seq")
+				}
+			},
+		},
+		{
+			name: "existing peer higher seq updates topics and pings if not pinged",
+			arrange: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, nodeA1, []string{"x"}, false)
+			},
+			invokeNode:   nodeA2,
+			invokeTopics: []string{"a"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.NotContains(t, cp.byTopic, gossipsubcrawler.Topic("x"))
+				require.Contains(t, cp.byTopic, gossipsubcrawler.Topic("a"))
+				cp.mu.RUnlock()
+				if n, ok := recvPing(ch); !ok || n.ID() != nodeA2.ID() {
+					t.Fatalf("expected one ping for updated node")
+				}
+			},
+		},
+		{
+			name: "existing peer higher seq with already pinged does not ping",
+			arrange: func(cp *crawledPeers) {
+				p := addPeerWithTopics(t, cp, nodeA1, []string{"x"}, true)
+				// ensure pinged flag set
+				require.True(t, p.isPinged)
+			},
+			invokeNode:   nodeA2,
+			invokeTopics: []string{"a"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Contains(t, cp.byTopic, gossipsubcrawler.Topic("a"))
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping when already pinged")
+				}
+			},
+		},
+		{
+			name: "existing peer higher seq but empty topics removes peer and doesn't ping",
+			arrange: func(cp *crawledPeers) {
+				addPeerWithTopics(t, cp, nodeA1, []string{"x"}, false)
+			},
+			invokeNode:   nodeA2,
+			invokeTopics: nil,
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Empty(t, cp.byEnode)
+				require.Empty(t, cp.byPeerId)
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping when topics empty on update")
+				}
+			},
+		},
+		{
+			name: "corrupted existing entry with nil node is ignored (no change, no ping)",
+			arrange: func(cp *crawledPeers) {
+				pid, _ := enodeToPeerID(nodeA1)
+				cp.mu.Lock()
+				cp.byEnode[nodeA1.ID()] = &peerNode{id: nodeA1.ID(), node: nil, peerID: pid, topics: map[gossipsubcrawler.Topic]struct{}{gossipsubcrawler.Topic("x"): {}}}
+				cp.byPeerId[pid] = cp.byEnode[nodeA1.ID()]
+				cp.byTopic[gossipsubcrawler.Topic("x")] = map[peer.ID]struct{}{pid: {}}
+				cp.mu.Unlock()
+			},
+			invokeNode:   nodeA2,
+			invokeTopics: []string{"a"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Contains(t, cp.byTopic, gossipsubcrawler.Topic("x"))
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping for corrupted entry")
+				}
+			},
+		},
+		{
+			name:         "new peer with no ports causes enodeToPeerID error; no add, no ping",
+			arrange:      func(cp *crawledPeers) {},
+			invokeNode:   newNodeNoPorts(t),
+			invokeTopics: []string{"a"},
+			assert: func(t *testing.T, cp *crawledPeers, ch <-chan enode.Node) {
+				cp.mu.RLock()
+				require.Empty(t, cp.byEnode)
+				require.Empty(t, cp.byPeerId)
+				require.Empty(t, cp.byTopic)
+				cp.mu.RUnlock()
+				if _, ok := recvPing(ch); ok {
+					t.Fatalf("did not expect ping when enodeToPeerID fails")
+				}
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			cp, g, cancel := newCrawler()
+			defer cancel()
+			tc.arrange(cp)
+			cp.updateCrawledIfNewer(tc.invokeNode, tc.invokeTopics)
+			tc.assert(t, cp, g.pingCh)
+		})
+	}
+}
+
+func TestPeersForTopic(t *testing.T) {
+	t.Parallel()
+
+	newCrawler := func(filter gossipsubcrawler.PeerFilterFunc) (*GossipsubPeerCrawler, *crawledPeers) {
+		g := &GossipsubPeerCrawler{
+			peerFilter:   filter,
+			scorer:       func(peer.ID) float64 { return 0 },
+			crawledPeers: newTestCrawledPeers(),
+		}
+		return g, g.crawledPeers
+	}
+
+	// Prepare nodes
+	ln1 := createTestNodeRandom(t)
+	ln2 := createTestNodeRandom(t)
+	ln3 := createTestNodeRandom(t)
+	n1, n2, n3 := ln1.Node(), ln2.Node(), ln3.Node()
+	topic := gossipsubcrawler.Topic("top")
+
+	cases := []struct {
+		name    string
+		filter  gossipsubcrawler.PeerFilterFunc
+		setup   func(t *testing.T, g *GossipsubPeerCrawler, cp *crawledPeers)
+		wantIDs []enode.ID
+	}{
+		{
+			name:    "no peers for topic returns empty",
+			filter:  func(*enode.Node) bool { return true },
+			setup:   func(t *testing.T, g *GossipsubPeerCrawler, cp *crawledPeers) {},
+			wantIDs: nil,
+		},
+		{
+			name:   "excludes unpinged peers",
+			filter: func(*enode.Node) bool { return true },
+			setup: func(t *testing.T, g *GossipsubPeerCrawler, cp *crawledPeers) {
+				// Add one pinged and one not pinged on same topic
+				addPeerWithTopics(t, cp, n1, []string{string(topic)}, true)
+				addPeerWithTopics(t, cp, n2, []string{string(topic)}, false)
+			},
+			wantIDs: []enode.ID{n1.ID()},
+		},
+		{
+			name:   "applies peer filter to exclude",
+			filter: func(n *enode.Node) bool { return n.ID() != n2.ID() },
+			setup: func(t *testing.T, g *GossipsubPeerCrawler, cp *crawledPeers) {
+				addPeerWithTopics(t, cp, n1, []string{string(topic)}, true)
+				addPeerWithTopics(t, cp, n2, []string{string(topic)}, true)
+			},
+			wantIDs: []enode.ID{n1.ID()},
+		},
+		{
+			name:   "ignores dangling peerID in byTopic",
+			filter: func(*enode.Node) bool { return true },
+			setup: func(t *testing.T, g *GossipsubPeerCrawler, cp *crawledPeers) {
+				addPeerWithTopics(t, cp, n1, []string{string(topic)}, true)
+				// Add n2 then remove it from byPeerId to simulate dangling
+				p2 := addPeerWithTopics(t, cp, n2, []string{string(topic)}, true)
+				cp.mu.Lock()
+				delete(cp.byPeerId, p2.peerID)
+				cp.mu.Unlock()
+			},
+			wantIDs: []enode.ID{n1.ID()},
+		},
+		{
+			name:   "sorted by score descending",
+			filter: func(*enode.Node) bool { return true },
+			setup: func(t *testing.T, g *GossipsubPeerCrawler, cp *crawledPeers) {
+				// Add three pinged peers
+				p1 := addPeerWithTopics(t, cp, n1, []string{string(topic)}, true)
+				p2 := addPeerWithTopics(t, cp, n2, []string{string(topic)}, true)
+				p3 := addPeerWithTopics(t, cp, n3, []string{string(topic)}, true)
+				// Provide a deterministic scoring function
+				scores := map[peer.ID]float64{
+					p1.peerID: 3.0,
+					p2.peerID: 2.0,
+					p3.peerID: 1.0,
+				}
+				g.scorer = func(id peer.ID) float64 { return scores[id] }
+			},
+			wantIDs: []enode.ID{n1.ID(), n2.ID(), n3.ID()},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			g, cp := newCrawler(tc.filter)
+			cp.g = g
+			tc.setup(t, g, cp)
+			got := g.PeersForTopic(topic)
+			var gotIDs []enode.ID
+			for _, n := range got {
+				gotIDs = append(gotIDs, n.ID())
+			}
+			if tc.wantIDs == nil {
+				require.Empty(t, gotIDs)
+				return
+			}
+			require.Equal(t, tc.wantIDs, gotIDs)
+		})
+	}
+}
+
+func TestCrawler_AddsAndPingsPeer(t *testing.T) {
+	// Create a test node with valid ENR entries (IP/TCP/UDP)
+	localNode := createTestNodeRandom(t)
+	node := localNode.Node()
+
+	// Prepare a mock iterator returning our single node
+	iterator := p2ptest.NewMockIterator([]*enode.Node{node})
+	// Prepare a mock listener with successful Ping
+	mockListener := p2ptest.NewMockListener(localNode, iterator)
+	mockListener.PingFunc = func(*enode.Node) error { return nil }
+
+	// Inject a permissive peer filter
+	filter := gossipsubcrawler.PeerFilterFunc(func(n *enode.Node) bool { return true })
+
+	// Create crawler with small intervals
+	scorer := func(peer.ID) float64 { return 0 }
+	g, err := NewGossipsubPeerCrawler(&Service{}, mockListener, 2*time.Second, 10*time.Millisecond, 4, filter, scorer)
+	require.NoError(t, err)
+
+	// Assign a simple topic extractor
+	topic := "test/topic"
+	topicExtractor := func(ctx context.Context, n *enode.Node) ([]string, error) {
+		return []string{topic}, nil
+	}
+
+	// Run ping loop in background and perform a single crawl
+	require.NoError(t, g.Start(topicExtractor))
+	defer g.Stop()
+
+	// Verify that the peer has been indexed under the topic and marked as pinged
+	require.Eventually(t, func() bool {
+		g.crawledPeers.mu.RLock()
+		defer g.crawledPeers.mu.RUnlock()
+
+		peersByTopic := g.crawledPeers.byTopic[gossipsubcrawler.Topic(topic)]
+		if len(peersByTopic) == 0 {
+			return false
+		}
+		// Fetch the single peerNode and check status
+		for pid := range peersByTopic {
+			pn := g.crawledPeers.byPeerId[pid]
+			if pn == nil {
+				return false
+			}
+			return pn.isPinged
+		}
+		return false
+	}, 2*time.Second, 10*time.Millisecond)
+}
+
+func TestCrawler_SkipsPeer_WhenFilterRejects(t *testing.T) {
+	t.Parallel()
+
+	localNode := createTestNodeRandom(t)
+	node := localNode.Node()
+	iterator := p2ptest.NewMockIterator([]*enode.Node{node})
+	mockListener := p2ptest.NewMockListener(localNode, iterator)
+	mockListener.PingFunc = func(*enode.Node) error { return nil }
+
+	// Reject all peers via injected filter
+	filter := gossipsubcrawler.PeerFilterFunc(func(n *enode.Node) bool { return false })
+
+	scorer := func(peer.ID) float64 { return 0 }
+	g, err := NewGossipsubPeerCrawler(&Service{}, mockListener, 2*time.Second, 10*time.Millisecond, 2, filter, scorer)
+	if err != nil {
+		t.Fatalf("NewGossipsubPeerCrawler error: %v", err)
+	}
+
+	topic := "test/topic"
+	g.topicExtractor = func(ctx context.Context, n *enode.Node) ([]string, error) { return []string{topic}, nil }
+
+	g.crawl()
+
+	// Verify no peers are indexed, because filter rejected the node
+	g.crawledPeers.mu.RLock()
+	defer g.crawledPeers.mu.RUnlock()
+	if len(g.crawledPeers.byEnode) != 0 || len(g.crawledPeers.byPeerId) != 0 || len(g.crawledPeers.byTopic) != 0 {
+		t.Fatalf("expected no peers indexed, got byEnode=%d byPeerId=%d byTopic=%d",
+			len(g.crawledPeers.byEnode), len(g.crawledPeers.byPeerId), len(g.crawledPeers.byTopic))
+	}
+}
+
+func TestCrawler_RemoveTopic_RemovesTopicFromIndexes(t *testing.T) {
+	t.Parallel()
+
+	localNode := createTestNodeRandom(t)
+	node := localNode.Node()
+	iterator := p2ptest.NewMockIterator([]*enode.Node{node})
+	mockListener := p2ptest.NewMockListener(localNode, iterator)
+	mockListener.PingFunc = func(*enode.Node) error { return nil }
+
+	filter := gossipsubcrawler.PeerFilterFunc(func(n *enode.Node) bool { return true })
+
+	scorer := func(peer.ID) float64 { return 0 }
+	g, err := NewGossipsubPeerCrawler(&Service{}, mockListener, 2*time.Second, 10*time.Millisecond, 2, filter, scorer)
+	if err != nil {
+		t.Fatalf("NewGossipsubPeerCrawler error: %v", err)
+	}
+
+	topic1 := "test/topic1"
+	topic2 := "test/topic2"
+	g.topicExtractor = func(ctx context.Context, n *enode.Node) ([]string, error) { return []string{topic1, topic2}, nil }
+
+	// Single crawl to index topics
+	g.crawl()
+
+	// Remove one topic and assert it is pruned from all indexes
+	g.RemoveTopic(gossipsubcrawler.Topic(topic1))
+
+	g.crawledPeers.mu.RLock()
+	defer g.crawledPeers.mu.RUnlock()
+
+	if _, ok := g.crawledPeers.byTopic[gossipsubcrawler.Topic(topic1)]; ok {
+		t.Fatalf("expected topic1 to be removed from byTopic")
+	}
+
+	// Ensure peer still exists and retains topic2
+	for _, pn := range g.crawledPeers.byEnode {
+		if _, has1 := pn.topics[gossipsubcrawler.Topic(topic1)]; has1 {
+			t.Fatalf("expected topic1 to be removed from peer topics")
+		}
+		if _, has2 := pn.topics[gossipsubcrawler.Topic(topic2)]; !has2 {
+			t.Fatalf("expected topic2 to remain for peer")
+		}
+	}
+}

beacon-chain/p2p/gossipsubcrawler/BUILD.bazel

@@ -0,0 +1,14 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["interface.go"],
+    importpath = "github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler",
+    visibility = [
+        "//visibility:public",
+    ],
+    deps = [
+        "@com_github_ethereum_go_ethereum//p2p/enode:go_default_library",
+        "@com_github_libp2p_go_libp2p//core/peer:go_default_library",
+    ],
+)

beacon-chain/p2p/gossipsubcrawler/interface.go

@@ -0,0 +1,26 @@
+package gossipsubcrawler
+
+import (
+	"context"
+
+	"github.com/ethereum/go-ethereum/p2p/enode"
+	"github.com/libp2p/go-libp2p/core/peer"
+)
+
+type Topic string
+
+// TopicExtractor is a function that can determine the set of topics a current or potential peer
+// is subscribed to based on key/value pairs from the ENR record.
+type TopicExtractor func(ctx context.Context, node *enode.Node) ([]string, error)
+
+// PeerFilterFunc defines the filtering interface used by the crawler to decide if a node
+// is a valid candidate to index in the crawler.
+type PeerFilterFunc func(*enode.Node) bool
+
+type Crawler interface {
+	Start(te TopicExtractor) error
+	Stop()
+	RemovePeerId(peerID peer.ID)
+	RemoveTopic(topic Topic)
+	PeersForTopic(topic Topic) []*enode.Node
+}

beacon-chain/p2p/handshake.go

@@ -225,6 +225,10 @@ func (s *Service) AddDisconnectionHandler(handler func(ctx context.Context, id p
 					return
 				}
 
+				if s.crawler != nil {
+					s.crawler.RemovePeerId(peerID)
+				}
+
 				priorState, err := s.peers.ConnectionState(peerID)
 				if err != nil {
 					// Can happen if the peer has already disconnected, so...

beacon-chain/p2p/interfaces.go

@@ -4,8 +4,8 @@ import (
 	"context"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
@@ -101,8 +101,9 @@ type (
 		NodeID() enode.ID
 		DiscoveryAddresses() ([]multiaddr.Multiaddr, error)
 		RefreshPersistentSubnets()
-		FindAndDialPeersWithSubnets(ctx context.Context, topicFormat string, digest [fieldparams.VersionLength]byte, minimumPeersPerSubnet int, subnets map[uint64]bool) error
+		FindAndDialPeersWithSubnets(ctx context.Context, fullTopicForSubnet func(uint64) string, minimumPeersPerSubnet int, subnets map[uint64]bool) error
 		AddPingMethod(reqFunc func(ctx context.Context, id peer.ID) error)
+		Crawler() gossipsubcrawler.Crawler
 	}
 
 	// Sender abstracts the sending functionality from libp2p.

beacon-chain/p2p/monitoring.go

@@ -3,6 +3,7 @@ package p2p
 import (
 	"strings"
 
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/libp2p/go-libp2p/core/peerstore"
 	"github.com/prometheus/client_golang/prometheus"
@@ -26,12 +27,25 @@ var (
 		Help: "The number of peers in a given state.",
 	},
 		[]string{"state"})
+	p2pMaxPeers = promauto.NewGauge(prometheus.GaugeOpts{
+		Name: "p2p_max_peers",
+		Help: "The target maximum number of peers.",
+	})
+	p2pPeerCountDirectionType = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "p2p_peer_count_direction_type",
+		Help: "The number of peers in a given direction and type.",
+	},
+		[]string{"direction", "type"})
 	connectedPeersCount = promauto.NewGaugeVec(prometheus.GaugeOpts{
 		Name: "connected_libp2p_peers",
 		Help: "Tracks the total number of connected libp2p peers by agent string",
 	},
 		[]string{"agent"},
 	)
+	minimumPeersPerSubnet = promauto.NewGauge(prometheus.GaugeOpts{
+		Name: "p2p_minimum_peers_per_subnet",
+		Help: "The minimum number of peers to connect to per subnet",
+	})
 	avgScoreConnectedClients = promauto.NewGaugeVec(prometheus.GaugeOpts{
 		Name: "connected_libp2p_peers_average_scores",
 		Help: "Tracks the overall p2p scores of connected libp2p peers by agent string",
@@ -174,18 +188,26 @@ var (
 )
 
 func (s *Service) updateMetrics() {
+	store := s.Host().Peerstore()
 	connectedPeers := s.peers.Connected()
+
 	p2pPeerCount.WithLabelValues("Connected").Set(float64(len(connectedPeers)))
 	p2pPeerCount.WithLabelValues("Disconnected").Set(float64(len(s.peers.Disconnected())))
 	p2pPeerCount.WithLabelValues("Connecting").Set(float64(len(s.peers.Connecting())))
 	p2pPeerCount.WithLabelValues("Disconnecting").Set(float64(len(s.peers.Disconnecting())))
 	p2pPeerCount.WithLabelValues("Bad").Set(float64(len(s.peers.Bad())))
 
-	store := s.Host().Peerstore()
-	numConnectedPeersByClient := make(map[string]float64)
+	upperTCP := strings.ToUpper(string(peers.TCP))
+	upperQUIC := strings.ToUpper(string(peers.QUIC))
+
+	p2pPeerCountDirectionType.WithLabelValues("inbound", upperTCP).Set(float64(len(s.peers.InboundConnectedWithProtocol(peers.TCP))))
+	p2pPeerCountDirectionType.WithLabelValues("inbound", upperQUIC).Set(float64(len(s.peers.InboundConnectedWithProtocol(peers.QUIC))))
+	p2pPeerCountDirectionType.WithLabelValues("outbound", upperTCP).Set(float64(len(s.peers.OutboundConnectedWithProtocol(peers.TCP))))
+	p2pPeerCountDirectionType.WithLabelValues("outbound", upperQUIC).Set(float64(len(s.peers.OutboundConnectedWithProtocol(peers.QUIC))))
+
+	connectedPeersCountByClient := make(map[string]float64)
 	peerScoresByClient := make(map[string][]float64)
-	for i := 0; i < len(connectedPeers); i++ {
-		p := connectedPeers[i]
+	for _, p := range connectedPeers {
 		pid, err := peer.Decode(p.String())
 		if err != nil {
 			log.WithError(err).Debug("Could not decode peer string")
@@ -193,16 +215,18 @@ func (s *Service) updateMetrics() {
 		}
 
 		foundName := agentFromPid(pid, store)
-		numConnectedPeersByClient[foundName] += 1
+		connectedPeersCountByClient[foundName] += 1
 
 		// Get peer scoring data.
 		overallScore := s.peers.Scorers().Score(pid)
 		peerScoresByClient[foundName] = append(peerScoresByClient[foundName], overallScore)
 	}
+
 	connectedPeersCount.Reset() // Clear out previous results.
-	for agent, total := range numConnectedPeersByClient {
+	for agent, total := range connectedPeersCountByClient {
 		connectedPeersCount.WithLabelValues(agent).Set(total)
 	}
+
 	avgScoreConnectedClients.Reset() // Clear out previous results.
 	for agent, scoringData := range peerScoresByClient {
 		avgScore := average(scoringData)

beacon-chain/p2p/peers/benchmark_test.go

@@ -3,7 +3,7 @@ package peers
 import (
 	"testing"
 
-	"github.com/prysmaticlabs/go-bitfield"
+	"github.com/OffchainLabs/go-bitfield"
 )
 
 func Benchmark_retrieveIndicesFromBitfield(b *testing.B) {

beacon-chain/p2p/peers/status.go

@@ -25,10 +25,12 @@ package peers
 import (
 	"context"
 	"net"
+	"slices"
 	"sort"
 	"strings"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/peerdata"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/scorers"
 	"github.com/OffchainLabs/prysm/v6/config/features"
@@ -46,7 +48,6 @@ import (
 	ma "github.com/multiformats/go-multiaddr"
 	manet "github.com/multiformats/go-multiaddr/net"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 const (
@@ -81,29 +82,31 @@ const (
 type InternetProtocol string
 
 const (
-	TCP  = "tcp"
-	QUIC = "quic"
+	TCP  = InternetProtocol("tcp")
+	QUIC = InternetProtocol("quic")
 )
 
-// Status is the structure holding the peer status information.
-type Status struct {
-	ctx                   context.Context
-	scorers               *scorers.Service
-	store                 *peerdata.Store
-	ipTracker             map[string]uint64
-	rand                  *rand.Rand
-	ipColocationWhitelist []*net.IPNet
-}
+type (
+	// Status is the structure holding the peer status information.
+	Status struct {
+		ctx                   context.Context
+		scorers               *scorers.Service
+		store                 *peerdata.Store
+		ipTracker             map[string]uint64
+		rand                  *rand.Rand
+		ipColocationWhitelist []*net.IPNet
+	}
 
-// StatusConfig represents peer status service params.
-type StatusConfig struct {
-	// PeerLimit specifies maximum amount of concurrent peers that are expected to be connect to the node.
-	PeerLimit int
-	// ScorerParams holds peer scorer configuration params.
-	ScorerParams *scorers.Config
-	// IPColocationWhitelist contains CIDR ranges that are exempt from IP colocation limits.
-	IPColocationWhitelist []*net.IPNet
-}
+	// StatusConfig represents peer status service params.
+	StatusConfig struct {
+		// PeerLimit specifies maximum amount of concurrent peers that are expected to be connect to the node.
+		PeerLimit int
+		// ScorerParams holds peer scorer configuration params.
+		ScorerParams *scorers.Config
+		// IPColocationWhitelist contains CIDR ranges that are exempt from IP colocation limits.
+		IPColocationWhitelist []*net.IPNet
+	}
+)
 
 // NewStatus creates a new status entity.
 func NewStatus(ctx context.Context, config *StatusConfig) *Status {
@@ -304,11 +307,8 @@ func (p *Status) SubscribedToSubnet(index uint64) []peer.ID {
 		connectedStatus := peerData.ConnState == Connecting || peerData.ConnState == Connected
 		if connectedStatus && peerData.MetaData != nil && !peerData.MetaData.IsNil() && peerData.MetaData.AttnetsBitfield() != nil {
 			indices := indicesFromBitfield(peerData.MetaData.AttnetsBitfield())
-			for _, idx := range indices {
-				if idx == index {
-					peers = append(peers, pid)
-					break
-				}
+			if slices.Contains(indices, index) {
+				peers = append(peers, pid)
 			}
 		}
 	}

beacon-chain/p2p/peers/status_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/peerdata"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/scorers"
@@ -21,7 +22,6 @@ import (
 	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/peer"
 	ma "github.com/multiformats/go-multiaddr"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestStatus(t *testing.T) {

beacon-chain/p2p/rpc_topic_mappings.go

@@ -345,17 +345,17 @@ func TopicFromMessage(msg string, epoch primitives.Epoch) (string, error) {
 		return "", errors.Errorf("%s: %s", invalidRPCMessageType, msg)
 	}
 
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 
 	// Check if the message is to be updated in fulu.
-	if epoch >= beaconConfig.FuluForkEpoch {
+	if epoch >= cfg.FuluForkEpoch {
 		if version, ok := fuluMapping[msg]; ok {
 			return protocolPrefix + msg + version, nil
 		}
 	}
 
 	// Check if the message is to be updated in altair.
-	if epoch >= beaconConfig.AltairForkEpoch {
+	if epoch >= cfg.AltairForkEpoch {
 		if version, ok := altairMapping[msg]; ok {
 			return protocolPrefix + msg + version, nil
 		}

beacon-chain/p2p/service.go

@@ -11,9 +11,11 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/async"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/scorers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/types"
+	"github.com/OffchainLabs/prysm/v6/cmd/beacon-chain/flags"
 	"github.com/OffchainLabs/prysm/v6/config/features"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
@@ -60,39 +62,45 @@ var (
 	// for the current peer limit status for the time period
 	// defined below.
 	pollingPeriod = 6 * time.Second
+
+	crawlTimeout       = 30 * time.Second
+	crawlInterval      = 1 * time.Second
+	maxConcurrentDials = 256
 )
 
 // Service for managing peer to peer (p2p) networking.
 type Service struct {
-	started               bool
-	isPreGenesis          bool
-	pingMethod            func(ctx context.Context, id peer.ID) error
-	pingMethodLock        sync.RWMutex
-	cancel                context.CancelFunc
-	cfg                   *Config
-	peers                 *peers.Status
-	addrFilter            *multiaddr.Filters
-	ipLimiter             *leakybucket.Collector
-	privKey               *ecdsa.PrivateKey
-	metaData              metadata.Metadata
-	pubsub                *pubsub.PubSub
-	joinedTopics          map[string]*pubsub.Topic
-	joinedTopicsLock      sync.RWMutex
-	subnetsLock           map[uint64]*sync.RWMutex
-	subnetsLockLock       sync.Mutex // Lock access to subnetsLock
-	initializationLock    sync.Mutex
-	dv5Listener           ListenerRebooter
-	startupErr            error
-	ctx                   context.Context
-	host                  host.Host
-	genesisTime           time.Time
-	genesisValidatorsRoot []byte
-	activeValidatorCount  uint64
-	peerDisconnectionTime *cache.Cache
-	custodyInfo           *custodyInfo
-	custodyInfoLock       sync.RWMutex // Lock access to custodyInfo
-	custodyInfoSet        chan struct{}
-	allForkDigests        map[[4]byte]struct{}
+	started                  bool
+	isPreGenesis             bool
+	pingMethod               func(ctx context.Context, id peer.ID) error
+	pingMethodLock           sync.RWMutex
+	cancel                   context.CancelFunc
+	cfg                      *Config
+	peers                    *peers.Status
+	addrFilter               *multiaddr.Filters
+	ipLimiter                *leakybucket.Collector
+	privKey                  *ecdsa.PrivateKey
+	metaData                 metadata.Metadata
+	pubsub                   *pubsub.PubSub
+	joinedTopics             map[string]*pubsub.Topic
+	joinedTopicsLock         sync.RWMutex
+	subnetsLock              map[uint64]*sync.RWMutex
+	subnetsLockLock          sync.Mutex // Lock access to subnetsLock
+	initializationLock       sync.Mutex
+	dv5Listener              ListenerRebooter
+	startupErr               error
+	ctx                      context.Context
+	host                     host.Host
+	genesisTime              time.Time
+	genesisValidatorsRoot    []byte
+	activeValidatorCount     uint64
+	activeValidatorCountLock sync.Mutex
+	peerDisconnectionTime    *cache.Cache
+	custodyInfo              *custodyInfo
+	custodyInfoLock          sync.RWMutex // Lock access to custodyInfo
+	custodyInfoSet           chan struct{}
+	allForkDigests           map[[4]byte]struct{}
+	crawler                  gossipsubcrawler.Crawler
 }
 
 type custodyInfo struct {
@@ -106,12 +114,16 @@ func NewService(ctx context.Context, cfg *Config) (*Service, error) {
 	ctx, cancel := context.WithCancel(ctx)
 	_ = cancel // govet fix for lost cancel. Cancel is handled in service.Stop().
 
-	cfg = validateConfig(cfg)
+	validateConfig(cfg)
+
 	privKey, err := privKey(cfg)
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to generate p2p private key")
 	}
 
+	p2pMaxPeers.Set(float64(cfg.MaxPeers))
+	minimumPeersPerSubnet.Set(float64(flags.Get().MinimumPeersPerSubnet))
+
 	metaData, err := metaDataFromDB(ctx, cfg.DB)
 	if err != nil {
 		log.WithError(err).Error("Failed to create peer metadata")
@@ -235,6 +247,21 @@ func (s *Service) Start() {
 
 		s.dv5Listener = listener
 		go s.listenForNewNodes()
+		crawler, err := NewGossipsubPeerCrawler(
+			s,
+			s.dv5Listener,
+			crawlTimeout,
+			crawlInterval,
+			maxConcurrentDials,
+			gossipsubcrawler.PeerFilterFunc(s.filterPeer),
+			s.Peers().Scorers().Score,
+		)
+		if err != nil {
+			log.WithError(err).Fatal("Failed to create peer crawler")
+			s.startupErr = err
+			return
+		}
+		s.crawler = crawler
 	}
 
 	s.started = true
@@ -305,12 +332,19 @@ func (s *Service) Start() {
 func (s *Service) Stop() error {
 	defer s.cancel()
 	s.started = false
+
 	if s.dv5Listener != nil {
 		s.dv5Listener.Close()
 	}
+
 	return nil
 }
 
+// Crawler returns the p2p service's peer crawler.
+func (s *Service) Crawler() gossipsubcrawler.Crawler {
+	return s.crawler
+}
+
 // Status of the p2p service. Will return an error if the service is considered unhealthy to
 // indicate that this node should not serve traffic until the issue has been resolved.
 func (s *Service) Status() error {
@@ -551,3 +585,15 @@ func (s *Service) downscorePeer(peerID peer.ID, reason string) {
 	newScore := s.Peers().Scorers().BadResponsesScorer().Increment(peerID)
 	log.WithFields(logrus.Fields{"peerID": peerID, "reason": reason, "newScore": newScore}).Debug("Downscore peer")
 }
+
+func AttestationSubnets(nodeID enode.ID, node *enode.Node, record *enr.Record) (map[uint64]bool, error) {
+	return attestationSubnets(record)
+}
+
+func SyncSubnets(nodeID enode.ID, node *enode.Node, record *enr.Record) (map[uint64]bool, error) {
+	return syncSubnets(record)
+}
+
+func DataColumnSubnets(nodeID enode.ID, node *enode.Node, record *enr.Record) (map[uint64]bool, error) {
+	return dataColumnSubnets(nodeID, record)
+}

beacon-chain/p2p/subnets.go

@@ -8,11 +8,12 @@ import (
 	"sync"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
 	"github.com/OffchainLabs/prysm/v6/cmd/beacon-chain/flags"
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/wrapper"
@@ -24,7 +25,6 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/holiman/uint256"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/sirupsen/logrus"
 )
 
@@ -84,8 +84,7 @@ func (s *Service) nodeFilter(topic string, indices map[uint64]int) (func(node *e
 // In this case, the function returns an error.
 func (s *Service) FindAndDialPeersWithSubnets(
 	ctx context.Context,
-	topicFormat string,
-	digest [fieldparams.VersionLength]byte,
+	fullTopicForSubnet func(uint64) string,
 	minimumPeersPerSubnet int,
 	subnets map[uint64]bool,
 ) error {
@@ -103,33 +102,34 @@ func (s *Service) FindAndDialPeersWithSubnets(
 		maxConcurrentDials = flags.Get().MaxConcurrentDials
 	}
 
-	defectiveSubnets := s.defectiveSubnets(topicFormat, digest, minimumPeersPerSubnet, subnets)
+	defectiveSubnets := s.defectiveSubnets(fullTopicForSubnet, minimumPeersPerSubnet, subnets)
 	for len(defectiveSubnets) > 0 {
+		defectiveSubnets = s.defectiveSubnets(fullTopicForSubnet, minimumPeersPerSubnet, subnets)
+
 		// Stop the search/dialing loop if the context is canceled.
 		if err := ctx.Err(); err != nil {
 			return err
 		}
 
-		peersToDial, err := func() ([]*enode.Node, error) {
-			ctx, cancel := context.WithTimeout(ctx, batchPeriod)
-			defer cancel()
-
-			peersToDial, err := s.findPeersWithSubnets(ctx, topicFormat, digest, minimumPeersPerSubnet, defectiveSubnets)
-			if err != nil && !errors.Is(err, context.DeadlineExceeded) {
-				return nil, errors.Wrap(err, "find peers with subnets")
+		var peersToDial []*enode.Node
+		for subnet := range defectiveSubnets {
+			topic := fullTopicForSubnet(subnet)
+			peersToDial = append(peersToDial, s.crawler.PeersForTopic(gossipsubcrawler.Topic(topic))...)
+		}
+		if len(peersToDial) > minimumPeersPerSubnet {
+			peersToDial = peersToDial[:minimumPeersPerSubnet]
+		}
+		if len(peersToDial) == 0 {
+			select {
+			case <-time.After(100 * time.Millisecond):
+			case <-ctx.Done():
+				return ctx.Err()
 			}
-
-			return peersToDial, nil
-		}()
-
-		if err != nil {
-			return err
+			continue
 		}
 
 		// Dial new peers in batches.
 		s.dialPeers(s.ctx, maxConcurrentDials, peersToDial)
-
-		defectiveSubnets = s.defectiveSubnets(topicFormat, digest, minimumPeersPerSubnet, subnets)
 	}
 
 	return nil
@@ -158,8 +158,7 @@ func updateDefectiveSubnets(
 // It returns new peers found during the search.
 func (s *Service) findPeersWithSubnets(
 	ctx context.Context,
-	topicFormat string,
-	digest [fieldparams.VersionLength]byte,
+	fullTopicForSubnet func(uint64) string,
 	minimumPeersPerSubnet int,
 	defectiveSubnetsOrigin map[uint64]int,
 ) ([]*enode.Node, error) {
@@ -181,7 +180,13 @@ func (s *Service) findPeersWithSubnets(
 	}()
 
 	// Retrieve the filter function that will be used to filter nodes based on the defective subnets.
-	filter, err := s.nodeFilter(topicFormat, defectiveSubnets)
+	// Use any subnet's full topic to infer the family type from the topic string.
+	var sampleTopic string
+	for k := range defectiveSubnets {
+		sampleTopic = fullTopicForSubnet(k)
+		break
+	}
+	filter, err := s.nodeFilter(sampleTopic, defectiveSubnets)
 	if err != nil {
 		return nil, errors.Wrap(err, "node filter")
 	}
@@ -225,8 +230,8 @@ func (s *Service) findPeersWithSubnets(
 		nodeSubnets, err := filter(node)
 		if err != nil {
 			log.WithError(err).WithFields(logrus.Fields{
-				"nodeID":      node.ID(),
-				"topicFormat": topicFormat,
+				"nodeID": node.ID(),
+				"topic":  sampleTopic,
 			}).Debug("Could not get needed subnets from peer")
 
 			continue
@@ -241,7 +246,7 @@ func (s *Service) findPeersWithSubnets(
 		nodeByNodeID[node.ID()] = node
 
 		updateDefectiveSubnets(nodeSubnets, defectiveSubnets)
-		filter, err = s.nodeFilter(topicFormat, defectiveSubnets)
+		filter, err = s.nodeFilter(sampleTopic, defectiveSubnets)
 		if err != nil {
 			return nil, errors.Wrap(err, "node filter")
 		}
@@ -258,14 +263,13 @@ func (s *Service) findPeersWithSubnets(
 
 // defectiveSubnets returns a map of subnets that have fewer than the minimum peer count.
 func (s *Service) defectiveSubnets(
-	topicFormat string,
-	digest [fieldparams.VersionLength]byte,
+	fullTopicForSubnet func(uint64) string,
 	minimumPeersPerSubnet int,
 	subnets map[uint64]bool,
 ) map[uint64]int {
 	missingCountPerSubnet := make(map[uint64]int, len(subnets))
 	for subnet := range subnets {
-		topic := fmt.Sprintf(topicFormat, digest, subnet) + s.Encoding().ProtocolSuffix()
+		topic := fullTopicForSubnet(subnet)
 		peers := s.pubsub.ListPeers(topic)
 		peerCount := len(peers)
 		if peerCount < minimumPeersPerSubnet {
@@ -514,18 +518,18 @@ func initializePersistentSubnets(id enode.ID, epoch primitives.Epoch) error {
 //
 //	return [compute_subscribed_subnet(node_id, epoch, index) for index in range(SUBNETS_PER_NODE)]
 func computeSubscribedSubnets(nodeID enode.ID, epoch primitives.Epoch) ([]uint64, error) {
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 
 	if flags.Get().SubscribeToAllSubnets {
-		subnets := make([]uint64, 0, beaconConfig.AttestationSubnetCount)
-		for i := range beaconConfig.AttestationSubnetCount {
+		subnets := make([]uint64, 0, cfg.AttestationSubnetCount)
+		for i := range cfg.AttestationSubnetCount {
 			subnets = append(subnets, i)
 		}
 		return subnets, nil
 	}
 
-	subnets := make([]uint64, 0, beaconConfig.SubnetsPerNode)
-	for i := range beaconConfig.SubnetsPerNode {
+	subnets := make([]uint64, 0, cfg.SubnetsPerNode)
+	for i := range cfg.SubnetsPerNode {
 		sub, err := computeSubscribedSubnet(nodeID, epoch, i)
 		if err != nil {
 			return nil, errors.Wrap(err, "compute subscribed subnet")

beacon-chain/p2p/subnets_test.go

@@ -7,6 +7,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	testDB "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
@@ -23,7 +24,6 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/libp2p/go-libp2p/core/crypto"
 	"github.com/libp2p/go-libp2p/core/network"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
@@ -114,8 +114,23 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 		require.NoError(t, err)
 		require.Equal(t, true, nodeForkDigest == bootNodeForkDigest, "fork digest of the node doesn't match the boot node")
 
-		// Start the service.
-		service.Start()
+        // Start the service.
+        service.Start()
+
+        // start the crawler with a topic extractor that maps ENR attestation subnets
+        // to full attestation topics for the current fork digest and encoding.
+        _ = service.Crawler().Start(func(ctx context.Context, node *enode.Node) ([]string, error) {
+            subs, err := attestationSubnets(node.Record())
+            if err != nil {
+                return nil, err
+            }
+            var topics []string
+            for subnet := range subs {
+                t := fmt.Sprintf(AttestationSubnetTopicFormat, bootNodeForkDigest, subnet) + service.Encoding().ProtocolSuffix()
+                topics = append(topics, t)
+            }
+            return topics, nil
+        })
 
 		// Set the ENR `attnets`, used by Prysm to filter peers by subnet.
 		bitV := bitfield.NewBitvector64()
@@ -161,23 +176,40 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 	service.genesisValidatorsRoot = params.BeaconConfig().GenesisValidatorsRoot[:]
 	service.custodyInfo = &custodyInfo{}
 
-	service.Start()
+    service.Start()
+    // start the crawler with a topic extractor that maps ENR attestation subnets
+    // to full attestation topics for the current fork digest and encoding.
+    _ = service.Crawler().Start(func(ctx context.Context, node *enode.Node) ([]string, error) {
+        subs, err := attestationSubnets(node.Record())
+        if err != nil {
+            return nil, err
+        }
+        var topics []string
+        for subnet := range subs {
+            t := fmt.Sprintf(AttestationSubnetTopicFormat, bootNodeForkDigest, subnet) + service.Encoding().ProtocolSuffix()
+            topics = append(topics, t)
+        }
+        return topics, nil
+    })
 	defer func() {
 		err := service.Stop()
 		require.NoError(t, err)
 	}()
 
 	subnets := map[uint64]bool{1: true, 2: true, 3: true}
-	defectiveSubnets := service.defectiveSubnets(AttestationSubnetTopicFormat, bootNodeForkDigest, minimumPeersPerSubnet, subnets)
+	builder := func(idx uint64) string {
+		return fmt.Sprintf(AttestationSubnetTopicFormat, bootNodeForkDigest, idx) + service.Encoding().ProtocolSuffix()
+	}
+	defectiveSubnets := service.defectiveSubnets(builder, minimumPeersPerSubnet, subnets)
 	require.Equal(t, subnetCount, len(defectiveSubnets))
 
-	ctxWithTimeOut, cancel := context.WithTimeout(ctx, 5*time.Second)
+    ctxWithTimeOut, cancel := context.WithTimeout(ctx, 15*time.Second)
 	defer cancel()
 
-	err = service.FindAndDialPeersWithSubnets(ctxWithTimeOut, AttestationSubnetTopicFormat, bootNodeForkDigest, minimumPeersPerSubnet, subnets)
+	err = service.FindAndDialPeersWithSubnets(ctxWithTimeOut, builder, minimumPeersPerSubnet, subnets)
 	require.NoError(t, err)
 
-	defectiveSubnets = service.defectiveSubnets(AttestationSubnetTopicFormat, bootNodeForkDigest, minimumPeersPerSubnet, subnets)
+	defectiveSubnets = service.defectiveSubnets(builder, minimumPeersPerSubnet, subnets)
 	require.Equal(t, 0, len(defectiveSubnets))
 }
 
@@ -524,12 +556,12 @@ func TestSubnetComputation(t *testing.T) {
 	require.NoError(t, err)
 
 	localNode := enode.NewLocalNode(db, convertedKey)
-	beaconConfig := params.BeaconConfig()
+	cfg := params.BeaconConfig()
 
 	t.Run("standard", func(t *testing.T) {
 		retrievedSubnets, err := computeSubscribedSubnets(localNode.ID(), 1000)
 		require.NoError(t, err)
-		require.Equal(t, beaconConfig.SubnetsPerNode, uint64(len(retrievedSubnets)))
+		require.Equal(t, cfg.SubnetsPerNode, uint64(len(retrievedSubnets)))
 		require.Equal(t, retrievedSubnets[0]+1, retrievedSubnets[1])
 	})
 
@@ -541,8 +573,8 @@ func TestSubnetComputation(t *testing.T) {
 
 		retrievedSubnets, err := computeSubscribedSubnets(localNode.ID(), 1000)
 		require.NoError(t, err)
-		require.Equal(t, beaconConfig.AttestationSubnetCount, uint64(len(retrievedSubnets)))
-		for i := range beaconConfig.AttestationSubnetCount {
+		require.Equal(t, cfg.AttestationSubnetCount, uint64(len(retrievedSubnets)))
+		for i := range cfg.AttestationSubnetCount {
 			require.Equal(t, i, retrievedSubnets[i])
 		}
 	})
@@ -762,10 +794,12 @@ func TestFindPeersWithSubnets_NodeDeduplication(t *testing.T) {
 			ctxWithTimeout, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
 			defer cancel()
 
+			builder := func(idx uint64) string {
+				return fmt.Sprintf(AttestationSubnetTopicFormat, digest, idx) + s.Encoding().ProtocolSuffix()
+			}
 			result, err := s.findPeersWithSubnets(
 				ctxWithTimeout,
-				AttestationSubnetTopicFormat,
-				digest,
+				builder,
 				1,
 				tt.defectiveSubnets,
 			)
@@ -982,10 +1016,12 @@ func TestFindPeersWithSubnets_FilterPeerRemoval(t *testing.T) {
 			ctxWithTimeout, cancel := context.WithTimeout(ctx, 100*time.Millisecond)
 			defer cancel()
 
+			builder := func(idx uint64) string {
+				return fmt.Sprintf(AttestationSubnetTopicFormat, digest, idx) + s.Encoding().ProtocolSuffix()
+			}
 			result, err := s.findPeersWithSubnets(
 				ctxWithTimeout,
-				AttestationSubnetTopicFormat,
-				digest,
+				builder,
 				1,
 				tt.defectiveSubnets,
 			)
@@ -1105,10 +1141,12 @@ func TestFindPeersWithSubnets_received_bad_existing_node(t *testing.T) {
 	ctxWithTimeout, cancel := context.WithTimeout(ctx, 1*time.Second)
 	defer cancel()
 
+	builder := func(idx uint64) string {
+		return fmt.Sprintf(AttestationSubnetTopicFormat, digest, idx) + service.Encoding().ProtocolSuffix()
+	}
 	result, err := service.findPeersWithSubnets(
 		ctxWithTimeout,
-		AttestationSubnetTopicFormat,
-		digest,
+		builder,
 		1,
 		map[uint64]int{1: 2}, // Need 2 peers for subnet 1
 	)

beacon-chain/p2p/testing/BUILD.bazel

@@ -21,9 +21,9 @@ go_library(
     deps = [
         "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/p2p/encoder:go_default_library",
+        "//beacon-chain/p2p/gossipsubcrawler:go_default_library",
         "//beacon-chain/p2p/peers:go_default_library",
         "//beacon-chain/p2p/peers/scorers:go_default_library",
-        "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/interfaces:go_default_library",

beacon-chain/p2p/testing/fuzz_p2p.go

@@ -4,8 +4,8 @@ import (
 	"context"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
@@ -41,6 +41,11 @@ func (*FakeP2P) AddConnectionHandler(_, _ func(ctx context.Context, id peer.ID)
 
 }
 
+// Crawler -- fake.
+func (*FakeP2P) Crawler() gossipsubcrawler.Crawler {
+	return &MockCrawler{}
+}
+
 // AddDisconnectionHandler -- fake.
 func (*FakeP2P) AddDisconnectionHandler(_ func(ctx context.Context, id peer.ID) error) {
 }
@@ -71,7 +76,7 @@ func (*FakeP2P) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 }
 
 // FindAndDialPeersWithSubnets mocks the p2p func.
-func (*FakeP2P) FindAndDialPeersWithSubnets(ctx context.Context, topicFormat string, digest [fieldparams.VersionLength]byte, minimumPeersPerSubnet int, subnets map[uint64]bool) error {
+func (*FakeP2P) FindAndDialPeersWithSubnets(ctx context.Context, fullTopicForSubnet func(uint64) string, minimumPeersPerSubnet int, subnets map[uint64]bool) error {
 	return nil
 }
 

beacon-chain/p2p/testing/mock_peermanager.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"errors"
 
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/libp2p/go-libp2p/core/host"
@@ -58,9 +58,14 @@ func (m *MockPeerManager) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 func (*MockPeerManager) RefreshPersistentSubnets() {}
 
 // FindAndDialPeersWithSubnet .
-func (*MockPeerManager) FindAndDialPeersWithSubnets(ctx context.Context, topicFormat string, digest [fieldparams.VersionLength]byte, minimumPeersPerSubnet int, subnets map[uint64]bool) error {
+func (*MockPeerManager) FindAndDialPeersWithSubnets(ctx context.Context, fullTopicForSubnet func(uint64) string, minimumPeersPerSubnet int, subnets map[uint64]bool) error {
 	return nil
 }
 
 // AddPingMethod .
 func (*MockPeerManager) AddPingMethod(_ func(ctx context.Context, id peer.ID) error) {}
+
+// Crawler.
+func (*MockPeerManager) Crawler() gossipsubcrawler.Crawler {
+	return nil
+}

beacon-chain/p2p/testing/p2p.go

@@ -13,9 +13,9 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/gossipsubcrawler"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/scorers"
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
@@ -183,11 +183,7 @@ func (p *TestP2P) ReceivePubSub(topic string, msg proto.Message) {
 	if _, err := p.Encoding().EncodeGossip(buf, castedMsg); err != nil {
 		p.t.Fatalf("Failed to encode message: %v", err)
 	}
-	digest, err := p.ForkDigest()
-	if err != nil {
-		p.t.Fatal(err)
-	}
-	topicHandle, err := ps.Join(fmt.Sprintf(topic, digest) + p.Encoding().ProtocolSuffix())
+	topicHandle, err := ps.Join(topic)
 	if err != nil {
 		p.t.Fatal(err)
 	}
@@ -279,6 +275,9 @@ func (p *TestP2P) SubscribeToTopic(topic string, opts ...pubsub.SubOpt) (*pubsub
 // LeaveTopic closes topic and removes corresponding handler from list of joined topics.
 // This method will return error if there are outstanding event handlers or subscriptions.
 func (p *TestP2P) LeaveTopic(topic string) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
 	if t, ok := p.joinedTopics[topic]; ok {
 		if err := t.Close(); err != nil {
 			return err
@@ -420,7 +419,7 @@ func (p *TestP2P) Peers() *peers.Status {
 }
 
 // FindAndDialPeersWithSubnets mocks the p2p func.
-func (*TestP2P) FindAndDialPeersWithSubnets(ctx context.Context, topicFormat string, digest [fieldparams.VersionLength]byte, minimumPeersPerSubnet int, subnets map[uint64]bool) error {
+func (*TestP2P) FindAndDialPeersWithSubnets(ctx context.Context, fullTopicForSubnet func(uint64) string, minimumPeersPerSubnet int, subnets map[uint64]bool) error {
 	return nil
 }
 
@@ -558,3 +557,35 @@ func (s *TestP2P) custodyGroupCountFromPeerENR(pid peer.ID) uint64 {
 
 	return custodyGroupCount
 }
+
+// MockCrawler is a minimal mock implementation of PeerCrawler for testing
+type MockCrawler struct{}
+
+// Start does nothing as this is a mock
+func (m *MockCrawler) Start(gossipsubcrawler.TopicExtractor) error {
+	return nil
+}
+
+// Stop does nothing as this is a mock
+func (m *MockCrawler) Stop() {}
+
+// SetTopicExtractor does nothing as this is a mock
+func (m *MockCrawler) SetTopicExtractor(extractor func(context.Context, *enode.Node) ([]string, error)) error {
+	return nil
+}
+
+// RemoveTopic does nothing as this is a mock
+func (m *MockCrawler) RemoveTopic(topic gossipsubcrawler.Topic) {}
+
+// RemovePeerID does nothing as this is a mock
+func (m *MockCrawler) RemovePeerId(pid peer.ID) {}
+
+// PeersForTopic returns empty list as this is a mock
+func (m *MockCrawler) PeersForTopic(topic gossipsubcrawler.Topic) []*enode.Node {
+	return []*enode.Node{}
+}
+
+// Crawler returns a mock crawler implementation for testing.
+func (*TestP2P) Crawler() gossipsubcrawler.Crawler {
+	return &MockCrawler{}
+}

beacon-chain/p2p/utils.go

@@ -13,6 +13,7 @@ import (
 	"path"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/kv"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -28,7 +29,6 @@ import (
 	"github.com/libp2p/go-libp2p/core/crypto"
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/sirupsen/logrus"
 )
 

beacon-chain/rpc/eth/beacon/handlers_pool_test.go

@@ -10,6 +10,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
@@ -42,7 +43,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestListAttestations(t *testing.T) {

beacon-chain/rpc/eth/beacon/handlers_test.go

@@ -12,6 +12,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
@@ -44,7 +45,6 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
 	ssz "github.com/prysmaticlabs/fastssz"
-	"github.com/prysmaticlabs/go-bitfield"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"github.com/stretchr/testify/mock"
 	"go.uber.org/mock/gomock"

beacon-chain/rpc/eth/node/handlers_test.go

@@ -9,6 +9,7 @@ import (
 	"runtime"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
@@ -28,7 +29,6 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/libp2p/go-libp2p/core/peer"
 	ma "github.com/multiformats/go-multiaddr"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 type dummyIdentity enode.ID

beacon-chain/rpc/eth/rewards/handlers.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -208,8 +209,13 @@ func (s *Server) attRewardsState(w http.ResponseWriter, r *http.Request) (state.
 		httputil.HandleError(w, "Attestation rewards are not supported for Phase 0", http.StatusNotFound)
 		return nil, false
 	}
-	currentEpoch := uint64(slots.ToEpoch(s.TimeFetcher.CurrentSlot()))
-	if requestedEpoch+1 >= currentEpoch {
+	currentEpoch := slots.ToEpoch(s.TimeFetcher.CurrentSlot())
+	bufferedEpoch, err := primitives.Epoch(requestedEpoch).SafeAdd(1)
+	if err != nil {
+		httputil.HandleError(w, "Could not increment epoch: "+err.Error(), http.StatusNotFound)
+		return nil, false
+	}
+	if bufferedEpoch >= currentEpoch {
 		httputil.HandleError(w,
 			"Attestation rewards are available after two epoch transitions to ensure all attestations have a chance of inclusion",
 			http.StatusNotFound)
@@ -388,12 +394,9 @@ func syncRewardsVals(
 	scIndices := make([]primitives.ValidatorIndex, 0, len(allScIndices))
 	scVals := make([]*precompute.Validator, 0, len(allScIndices))
 	for _, valIdx := range valIndices {
-		for _, scIdx := range allScIndices {
-			if valIdx == scIdx {
-				scVals = append(scVals, allVals[valIdx])
-				scIndices = append(scIndices, valIdx)
-				break
-			}
+		if slices.Contains(allScIndices, valIdx) {
+			scVals = append(scVals, allVals[valIdx])
+			scIndices = append(scIndices, valIdx)
 		}
 	}
 

beacon-chain/rpc/eth/rewards/handlers_test.go

@@ -4,12 +4,14 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"math"
 	"net/http"
 	"net/http/httptest"
 	"strconv"
 	"strings"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
@@ -34,7 +36,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func BlockRewardTestSetup(t *testing.T, ver int) (state.BeaconState, interfaces.SignedBeaconBlock, error) {
@@ -747,6 +748,18 @@ func TestAttestationRewards(t *testing.T) {
 		assert.Equal(t, http.StatusNotFound, e.Code)
 		assert.Equal(t, "Attestation rewards are available after two epoch transitions to ensure all attestations have a chance of inclusion", e.Message)
 	})
+	t.Run("epoch overflow", func(t *testing.T) {
+		url := "http://only.the.epoch.number.at.the.end.is.important/" + strconv.FormatUint(math.MaxUint64, 10)
+		request := httptest.NewRequest("POST", url, nil)
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.AttestationRewards(writer, request)
+		assert.Equal(t, http.StatusNotFound, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusNotFound, e.Code)
+	})
 }
 
 func TestSyncCommiteeRewards(t *testing.T) {

beacon-chain/rpc/eth/validator/handlers_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	mockChain "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
@@ -43,7 +44,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )
 

beacon-chain/rpc/prysm/beacon/handlers_test.go

@@ -10,6 +10,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	chainMock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
@@ -33,7 +34,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func individualVotesHelper(t *testing.T, request *structs.GetIndividualVotesRequest, s *Server) (string, *structs.GetIndividualVotesResponse) {

beacon-chain/rpc/prysm/beacon/ssz_query_test.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	chainMock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
@@ -24,7 +25,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestQueryBeaconState(t *testing.T) {

beacon-chain/rpc/prysm/v1alpha1/beacon/attestations_test.go

@@ -7,6 +7,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	chainMock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	dbTest "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
@@ -27,7 +28,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 	"google.golang.org/protobuf/proto"
 )
 

beacon-chain/rpc/prysm/v1alpha1/beacon/validators_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/epoch/precompute"
@@ -37,7 +38,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	prysmTime "github.com/OffchainLabs/prysm/v6/time"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/known/emptypb"
 )

beacon-chain/rpc/prysm/v1alpha1/debug/block_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	dbTest "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
@@ -15,7 +16,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestServer_GetBlock(t *testing.T) {

beacon-chain/rpc/prysm/v1alpha1/validator/aggregator_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
@@ -25,7 +26,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestSubmitAggregateAndProof_Syncing(t *testing.T) {

beacon-chain/rpc/prysm/v1alpha1/validator/proposer.go

@@ -312,14 +312,14 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 	rob, err := blocks.NewROBlockWithRoot(block, root)
 	if block.IsBlinded() {
 		block, blobSidecars, err = vs.handleBlindedBlock(ctx, block)
+		if errors.Is(err, builderapi.ErrBadGateway) {
+			log.WithError(err).Info("Optimistically proposed block - builder relay temporarily unavailable, block may arrive over P2P")
+			return &ethpb.ProposeResponse{BlockRoot: root[:]}, nil
+		}
 	} else if block.Version() >= version.Deneb {
 		blobSidecars, dataColumnSidecars, err = vs.handleUnblindedBlock(rob, req)
 	}
 	if err != nil {
-		if errors.Is(err, builderapi.ErrBadGateway) && block.IsBlinded() {
-			log.WithError(err).Info("Optimistically proposed block - builder relay temporarily unavailable, block may arrive over P2P")
-			return &ethpb.ProposeResponse{BlockRoot: root[:]}, nil
-		}
 		return nil, status.Errorf(codes.Internal, "%s: %v", "handle block failed", err)
 	}
 

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_altair.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
 	"github.com/OffchainLabs/prysm/v6/config/params"
@@ -18,7 +19,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func (vs *Server) setSyncAggregate(ctx context.Context, blk interfaces.SignedBeaconBlock, headState state.BeaconState) {

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_altair_test.go

@@ -3,6 +3,7 @@ package validator
 import (
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	chainmock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/operations/synccommittee"
@@ -16,7 +17,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProposer_GetSyncAggregate_OK(t *testing.T) {

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_attestations.go

@@ -8,6 +8,7 @@ import (
 	"slices"
 	"sort"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/blocks"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/electra"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
@@ -23,7 +24,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/sirupsen/logrus"
 )
 

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_attestations_electra.go

@@ -4,10 +4,10 @@ import (
 	"cmp"
 	"slices"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 // computeOnChainAggregate constructs a final aggregate form a list of network aggregates with equal attestation data.

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_attestations_electra_test.go

@@ -4,6 +4,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls/blst"
@@ -11,7 +12,6 @@ import (
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func Test_computeOnChainAggregate(t *testing.T) {

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_attestations_test.go

@@ -7,6 +7,7 @@ import (
 	"strconv"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	chainMock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/electra"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
@@ -21,7 +22,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	builderapi "github.com/OffchainLabs/prysm/v6/api/client/builder"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
@@ -52,7 +53,6 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_utils_bench_test.go

@@ -4,11 +4,11 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	aggtesting "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation/aggregation/testing"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func BenchmarkProposerAtts_sortByProfitability(b *testing.B) {

beacon-chain/rpc/prysm/validator/handlers_test.go

@@ -11,6 +11,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
@@ -37,7 +38,6 @@ import (
 	prysmTime "github.com/OffchainLabs/prysm/v6/time"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func addDefaultReplayerBuilder(s *Server, h stategen.HistoryAccessor) {

beacon-chain/rpc/prysm/validator/validator_performance_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/epoch/precompute"
@@ -23,7 +24,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 func TestServer_GetValidatorPerformance(t *testing.T) {

beacon-chain/state/interfaces.go

@@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"time"
 
+	"github.com/OffchainLabs/go-bitfield"
 	customtypes "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native/custom-types"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
@@ -15,7 +16,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 // BeaconState has read and write access to beacon state methods.

beacon-chain/state/state-native/beacon_state.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"sync"
 
+	"github.com/OffchainLabs/go-bitfield"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/fieldtrie"
 	customtypes "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native/custom-types"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native/types"
@@ -11,7 +12,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/go-bitfield"
 )
 
 // BeaconState defines a struct containing utilities for the Ethereum Beacon Chain state, defining