Quick and dirty earliest_available_slot implementation (networking only).

* Add reconstruction metrics

* Fix time

* Fix format

* Fix format

* Update cells count function

* fix cells count

* Update reconstruction counter

* Fix peerDAS reconstruction counter metric

* Replace dataColumnSidecars with dataColumnSideCars

WORKSPACE

@@ -1,7 +1,7 @@
 workspace(name = "prysm")
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "rules_pkg",
@@ -16,8 +16,6 @@ load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
 
 rules_pkg_dependencies()
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
 http_archive(
     name = "toolchains_protoc",
     sha256 = "abb1540f8a9e045422730670ebb2f25b41fa56ca5a7cf795175a110a0a68f4ad",
@@ -255,16 +253,16 @@ filegroup(
     url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )
 
-consensus_spec_version = "v1.6.0-alpha.0"
+consensus_spec_version = "v1.6.0-alpha.1"
 
 load("@prysm//tools:download_spectests.bzl", "consensus_spec_tests")
 
 consensus_spec_tests(
     name = "consensus_spec_tests",
     flavors = {
-        "general": "sha256-W7oKvoM0nAkyitykRxAw6kmCvjYC01IqiNJy0AmCnMM=",
-        "minimal": "sha256-ig7/zxomjv6buBWMom4IxAJh3lFJ9+JnY44E7c8ZNP8=",
-        "mainnet": "sha256-mjx+MkXtPhCNv4c4knLYLIkvIdpF7WTjx/ElvGPQzSo=",
+        "general": "sha256-o4t9p3R+fQHF4KOykGmwlG3zDw5wUdVWprkzId8aIsk=",
+        "minimal": "sha256-sU7ToI8t3MR8x0vVjC8ERmAHZDWpEmnAC9FWIpHi5x4=",
+        "mainnet": "sha256-YKS4wngg0LgI9Upp4MYJ77aG+8+e/G4YeqEIlp06LZw=",
     },
     version = consensus_spec_version,
 )
@@ -280,7 +278,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-u0RkIZIeGttb3sInR31mO64aBSwxALqO5SYIPlqEvPo=",
+    integrity = "sha256-Nv4TEuEJPQIM4E6T9J0FOITsmappmXZjGtlhe1HEXnU=",
     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/beacon/BUILD.bazel

@@ -16,6 +16,7 @@ go_library(
         "//api/server/structs:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",

api/client/beacon/client.go

@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"path"
 	"regexp"
+	"sort"
 	"strconv"
 
 	"github.com/OffchainLabs/prysm/v6/api/client"
@@ -16,6 +17,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
@@ -135,6 +137,24 @@ func (c *Client) GetFork(ctx context.Context, stateId StateOrBlockId) (*ethpb.Fo
 	return fr.ToConsensus()
 }
 
+// GetForkSchedule retrieve all forks, past present and future, of which this node is aware.
+func (c *Client) GetForkSchedule(ctx context.Context) (forks.OrderedSchedule, error) {
+	body, err := c.Get(ctx, getForkSchedulePath)
+	if err != nil {
+		return nil, errors.Wrap(err, "error requesting fork schedule")
+	}
+	fsr := &forkScheduleResponse{}
+	err = json.Unmarshal(body, fsr)
+	if err != nil {
+		return nil, err
+	}
+	ofs, err := fsr.OrderedForkSchedule()
+	if err != nil {
+		return nil, errors.Wrap(err, fmt.Sprintf("problem unmarshaling %s response", getForkSchedulePath))
+	}
+	return ofs, nil
+}
+
 // GetConfigSpec retrieve the current configs of the network used by the beacon node.
 func (c *Client) GetConfigSpec(ctx context.Context) (*structs.GetSpecResponse, error) {
 	body, err := c.Get(ctx, getConfigSpecPath)
@@ -314,3 +334,31 @@ func (c *Client) GetBLStoExecutionChanges(ctx context.Context) (*structs.BLSToEx
 	}
 	return poolResponse, nil
 }
+
+type forkScheduleResponse struct {
+	Data []structs.Fork
+}
+
+func (fsr *forkScheduleResponse) OrderedForkSchedule() (forks.OrderedSchedule, error) {
+	ofs := make(forks.OrderedSchedule, 0)
+	for _, d := range fsr.Data {
+		epoch, err := strconv.ParseUint(d.Epoch, 10, 64)
+		if err != nil {
+			return nil, errors.Wrapf(err, "error parsing epoch %s", d.Epoch)
+		}
+		vSlice, err := hexutil.Decode(d.CurrentVersion)
+		if err != nil {
+			return nil, err
+		}
+		if len(vSlice) != 4 {
+			return nil, fmt.Errorf("got %d byte version, expected 4 bytes. version hex=%s", len(vSlice), d.CurrentVersion)
+		}
+		version := bytesutil.ToBytes4(vSlice)
+		ofs = append(ofs, forks.ForkScheduleEntry{
+			Version: version,
+			Epoch:   primitives.Epoch(epoch),
+		})
+	}
+	sort.Sort(ofs)
+	return ofs, nil
+}

api/server/structs/conversions_state.go

@@ -923,7 +923,14 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 	if err != nil {
 		return nil, err
 	}
-
+	srcLookahead, err := st.ProposerLookahead()
+	if err != nil {
+		return nil, err
+	}
+	lookahead := make([]string, len(srcLookahead))
+	for i, v := range srcLookahead {
+		lookahead[i] = fmt.Sprintf("%d", uint64(v))
+	}
 	return &BeaconStateFulu{
 		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime()),
 		GenesisValidatorsRoot:         hexutil.Encode(st.GenesisValidatorsRoot()),
@@ -962,5 +969,6 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 		PendingDeposits:               PendingDepositsFromConsensus(pbd),
 		PendingPartialWithdrawals:     PendingPartialWithdrawalsFromConsensus(ppw),
 		PendingConsolidations:         PendingConsolidationsFromConsensus(pc),
+		ProposerLookahead:             lookahead,
 	}, nil
 }

api/server/structs/endpoints_events.go

@@ -25,13 +25,6 @@ type BlockGossipEvent struct {
 	Block string `json:"block"`
 }
 
-type DataColumnGossipEvent struct {
-	Slot           string   `json:"slot"`
-	Index          string   `json:"index"`
-	BlockRoot      string   `json:"block_root"`
-	KzgCommitments []string `json:"kzg_commitments"`
-}
-
 type AggregatedAttEventSource struct {
 	Aggregate *Attestation `json:"aggregate"`
 }

api/server/structs/state.go

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

beacon-chain/blockchain/process_attestation.go

@@ -5,7 +5,6 @@ import (
 	"time"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
-	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -89,7 +88,7 @@ func (s *Service) OnAttestation(ctx context.Context, a ethpb.Att, disparity time
 	if err != nil {
 		return err
 	}
-	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot); err != nil {
+	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt); err != nil {
 		return err
 	}
 

beacon-chain/blockchain/process_block.go

@@ -72,6 +72,8 @@ func (s *Service) postBlockProcess(cfg *postBlockProcessConfig) error {
 	}
 	if features.Get().EnableLightClient && slots.ToEpoch(s.CurrentSlot()) >= params.BeaconConfig().AltairForkEpoch {
 		defer s.processLightClientUpdates(cfg)
+		defer s.saveLightClientUpdate(cfg)
+		defer s.saveLightClientBootstrap(cfg)
 	}
 	defer s.sendStateFeedOnBlock(cfg)
 	defer reportProcessingTime(startTime)
@@ -637,7 +639,12 @@ func missingDataColumnIndices(bs *filesystem.DataColumnStorage, root [fieldparam
 // The function will first check the database to see if all sidecars have been persisted. If any
 // sidecars are missing, it will then read from the sidecar notifier channel for the given root until the channel is
 // closed, the context hits cancellation/timeout, or notifications have been received for all the missing sidecars.
-func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signedBlock interfaces.ReadOnlySignedBeaconBlock) error {
+func (s *Service) isDataAvailable(
+	ctx context.Context,
+	root [fieldparams.RootLength]byte,
+	signedBlock interfaces.ReadOnlySignedBeaconBlock,
+	startWaiting ...chan<- bool, // For tests purposes only
+) error {
 	block := signedBlock.Block()
 	if block == nil {
 		return errors.New("invalid nil beacon block")
@@ -645,7 +652,7 @@ func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signedBloc
 
 	blockVersion := block.Version()
 	if blockVersion >= version.Fulu {
-		return s.areDataColumnsAvailable(ctx, root, block)
+		return s.areDataColumnsAvailable(ctx, root, block, startWaiting...)
 	}
 
 	if blockVersion >= version.Deneb {
@@ -657,7 +664,12 @@ func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signedBloc
 
 // areDataColumnsAvailable blocks until all data columns committed to in the block are available,
 // or an error or context cancellation occurs. A nil result means that the data availability check is successful.
-func (s *Service) areDataColumnsAvailable(ctx context.Context, root [fieldparams.RootLength]byte, block interfaces.ReadOnlyBeaconBlock) error {
+func (s *Service) areDataColumnsAvailable(
+	ctx context.Context,
+	root [fieldparams.RootLength]byte,
+	block interfaces.ReadOnlyBeaconBlock,
+	startWaiting ...chan<- bool, // For tests purposes only
+) error {
 	// We are only required to check within MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS
 	blockSlot, currentSlot := block.Slot(), s.CurrentSlot()
 	blockEpoch, currentEpoch := slots.ToEpoch(blockSlot), slots.ToEpoch(currentSlot)
@@ -724,6 +736,11 @@ func (s *Service) areDataColumnsAvailable(ctx context.Context, root [fieldparams
 		return nil
 	}
 
+	// Notify the caller that we are waiting for data columns.
+	if len(startWaiting) > 0 && startWaiting[0] != nil {
+		startWaiting[0] <- true
+	}
+
 	// Log for DA checks that cross over into the next slot; helpful for debugging.
 	nextSlot := slots.BeginsAt(block.Slot()+1, s.genesisTime)
 

beacon-chain/blockchain/process_block_helpers.go

@@ -131,12 +131,6 @@ func (s *Service) sendStateFeedOnBlock(cfg *postBlockProcessConfig) {
 }
 
 func (s *Service) processLightClientUpdates(cfg *postBlockProcessConfig) {
-	if err := s.processLightClientUpdate(cfg); err != nil {
-		log.WithError(err).Error("Failed to process light client update")
-	}
-	if err := s.processLightClientBootstrap(cfg); err != nil {
-		log.WithError(err).Error("Failed to process light client bootstrap")
-	}
 	if err := s.processLightClientOptimisticUpdate(cfg.ctx, cfg.roblock, cfg.postState); err != nil {
 		log.WithError(err).Error("Failed to process light client optimistic update")
 	}
@@ -145,33 +139,38 @@ func (s *Service) processLightClientUpdates(cfg *postBlockProcessConfig) {
 	}
 }
 
-// processLightClientUpdate saves the light client update for this block
+// saveLightClientUpdate saves the light client update for this block
 // if it's better than the already saved one, when feature flag is enabled.
-func (s *Service) processLightClientUpdate(cfg *postBlockProcessConfig) error {
+func (s *Service) saveLightClientUpdate(cfg *postBlockProcessConfig) {
 	attestedRoot := cfg.roblock.Block().ParentRoot()
 	attestedBlock, err := s.getBlock(cfg.ctx, attestedRoot)
 	if err != nil {
-		return errors.Wrapf(err, "could not get attested block for root %#x", attestedRoot)
+		log.WithError(err).Errorf("Saving light client update failed: Could not get attested block for root %#x", attestedRoot)
+		return
 	}
 	if attestedBlock == nil || attestedBlock.IsNil() {
-		return errors.New("attested block is nil")
+		log.Error("Saving light client update failed: Attested block is nil")
+		return
 	}
 	attestedState, err := s.cfg.StateGen.StateByRoot(cfg.ctx, attestedRoot)
 	if err != nil {
-		return errors.Wrapf(err, "could not get attested state for root %#x", attestedRoot)
+		log.WithError(err).Errorf("Saving light client update failed: Could not get attested state for root %#x", attestedRoot)
+		return
 	}
 	if attestedState == nil || attestedState.IsNil() {
-		return errors.New("attested state is nil")
+		log.Error("Saving light client update failed: Attested state is nil")
+		return
 	}
 
 	finalizedRoot := attestedState.FinalizedCheckpoint().Root
 	finalizedBlock, err := s.getBlock(cfg.ctx, [32]byte(finalizedRoot))
 	if err != nil {
 		if errors.Is(err, errBlockNotFoundInCacheOrDB) {
-			log.Debugf("Skipping saving light client update because finalized block is nil for root %#x", finalizedRoot)
-			return nil
+			log.Debugf("Skipping saving light client update: Finalized block is nil for root %#x", finalizedRoot)
+		} else {
+			log.WithError(err).Errorf("Saving light client update failed: Could not get finalized block for root %#x", finalizedRoot)
 		}
-		return errors.Wrapf(err, "could not get finalized block for root %#x", finalizedRoot)
+		return
 	}
 
 	update, err := lightclient.NewLightClientUpdateFromBeaconState(
@@ -184,52 +183,57 @@ func (s *Service) processLightClientUpdate(cfg *postBlockProcessConfig) error {
 		finalizedBlock,
 	)
 	if err != nil {
-		return errors.Wrapf(err, "could not create light client update")
+		log.WithError(err).Error("Saving light client update failed: Could not create light client update")
+		return
 	}
 
 	period := slots.SyncCommitteePeriod(slots.ToEpoch(attestedState.Slot()))
 
 	oldUpdate, err := s.cfg.BeaconDB.LightClientUpdate(cfg.ctx, period)
 	if err != nil {
-		return errors.Wrapf(err, "could not get current light client update")
+		log.WithError(err).Error("Saving light client update failed: Could not get current light client update")
+		return
 	}
 
 	if oldUpdate == nil {
 		if err := s.cfg.BeaconDB.SaveLightClientUpdate(cfg.ctx, period, update); err != nil {
-			return errors.Wrapf(err, "could not save light client update")
+			log.WithError(err).Error("Saving light client update failed: Could not save light client update")
+		} else {
+			log.WithField("period", period).Debug("Saving light client update: Saved new update")
 		}
-		log.WithField("period", period).Debug("Saved new light client update")
-		return nil
+		return
 	}
 
 	isNewUpdateBetter, err := lightclient.IsBetterUpdate(update, oldUpdate)
 	if err != nil {
-		return errors.Wrapf(err, "could not compare light client updates")
+		log.WithError(err).Error("Saving light client update failed: Could not compare light client updates")
+		return
 	}
 
 	if isNewUpdateBetter {
 		if err := s.cfg.BeaconDB.SaveLightClientUpdate(cfg.ctx, period, update); err != nil {
-			return errors.Wrapf(err, "could not save light client update")
+			log.WithError(err).Error("Saving light client update failed: Could not save light client update")
+		} else {
+			log.WithField("period", period).Debug("Saving light client update: Saved new update")
 		}
-		log.WithField("period", period).Debug("Saved new light client update")
-		return nil
+	} else {
+		log.WithField("period", period).Debug("Saving light client update: New update is not better than the current one. Skipping save.")
 	}
-	log.WithField("period", period).Debug("New light client update is not better than the current one, skipping save")
-	return nil
 }
 
-// processLightClientBootstrap saves a light client bootstrap for this block
+// saveLightClientBootstrap saves a light client bootstrap for this block
 // when feature flag is enabled.
-func (s *Service) processLightClientBootstrap(cfg *postBlockProcessConfig) error {
+func (s *Service) saveLightClientBootstrap(cfg *postBlockProcessConfig) {
 	blockRoot := cfg.roblock.Root()
 	bootstrap, err := lightclient.NewLightClientBootstrapFromBeaconState(cfg.ctx, s.CurrentSlot(), cfg.postState, cfg.roblock)
 	if err != nil {
-		return errors.Wrapf(err, "could not create light client bootstrap")
+		log.WithError(err).Error("Saving light client bootstrap failed: Could not create light client bootstrap")
+		return
 	}
-	if err := s.cfg.BeaconDB.SaveLightClientBootstrap(cfg.ctx, blockRoot[:], bootstrap); err != nil {
-		return errors.Wrapf(err, "could not save light client bootstrap")
+	err = s.cfg.BeaconDB.SaveLightClientBootstrap(cfg.ctx, blockRoot[:], bootstrap)
+	if err != nil {
+		log.WithError(err).Error("Saving light client bootstrap failed: Could not save light client bootstrap in DB")
 	}
-	return nil
 }
 
 func (s *Service) processLightClientFinalityUpdate(

beacon-chain/blockchain/process_block_test.go

@@ -2706,7 +2706,7 @@ func fakeResult(missing []uint64) map[uint64]struct{} {
 	return r
 }
 
-func TestProcessLightClientUpdate(t *testing.T) {
+func TestSaveLightClientUpdate(t *testing.T) {
 	featCfg := &features.Flags{}
 	featCfg.EnableLightClient = true
 	reset := features.InitWithReset(featCfg)
@@ -2747,7 +2747,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 				isValidPayload: true,
 			}
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			// Check that the light client update is saved
 			period := slots.SyncCommitteePeriod(slots.ToEpoch(l.AttestedState.Slot()))
@@ -2802,7 +2802,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 			err = s.cfg.BeaconDB.SaveLightClientUpdate(ctx, period, oldUpdate)
 			require.NoError(t, err)
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			u, err := s.cfg.BeaconDB.LightClientUpdate(ctx, period)
 			require.NoError(t, err)
@@ -2863,7 +2863,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 			err = s.cfg.BeaconDB.SaveLightClientUpdate(ctx, period, oldUpdate)
 			require.NoError(t, err)
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			u, err := s.cfg.BeaconDB.LightClientUpdate(ctx, period)
 			require.NoError(t, err)
@@ -2906,7 +2906,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 				isValidPayload: true,
 			}
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			// Check that the light client update is saved
 			period := slots.SyncCommitteePeriod(slots.ToEpoch(l.AttestedState.Slot()))
@@ -2960,7 +2960,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 			err = s.cfg.BeaconDB.SaveLightClientUpdate(ctx, period, oldUpdate)
 			require.NoError(t, err)
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			u, err := s.cfg.BeaconDB.LightClientUpdate(ctx, period)
 			require.NoError(t, err)
@@ -3021,7 +3021,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 			err = s.cfg.BeaconDB.SaveLightClientUpdate(ctx, period, oldUpdate)
 			require.NoError(t, err)
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			u, err := s.cfg.BeaconDB.LightClientUpdate(ctx, period)
 			require.NoError(t, err)
@@ -3064,7 +3064,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 				isValidPayload: true,
 			}
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			// Check that the light client update is saved
 			period := slots.SyncCommitteePeriod(slots.ToEpoch(l.AttestedState.Slot()))
@@ -3118,7 +3118,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 			err = s.cfg.BeaconDB.SaveLightClientUpdate(ctx, period, oldUpdate)
 			require.NoError(t, err)
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			u, err := s.cfg.BeaconDB.LightClientUpdate(ctx, period)
 			require.NoError(t, err)
@@ -3179,7 +3179,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 			err = s.cfg.BeaconDB.SaveLightClientUpdate(ctx, period, oldUpdate)
 			require.NoError(t, err)
 
-			require.NoError(t, s.processLightClientUpdate(cfg))
+			s.saveLightClientUpdate(cfg)
 
 			u, err := s.cfg.BeaconDB.LightClientUpdate(ctx, period)
 			require.NoError(t, err)
@@ -3192,7 +3192,7 @@ func TestProcessLightClientUpdate(t *testing.T) {
 	reset()
 }
 
-func TestProcessLightClientBootstrap(t *testing.T) {
+func TestSaveLightClientBootstrap(t *testing.T) {
 	featCfg := &features.Flags{}
 	featCfg.EnableLightClient = true
 	reset := features.InitWithReset(featCfg)
@@ -3222,7 +3222,7 @@ func TestProcessLightClientBootstrap(t *testing.T) {
 			isValidPayload: true,
 		}
 
-		require.NoError(t, s.processLightClientBootstrap(cfg))
+		s.saveLightClientBootstrap(cfg)
 
 		// Check that the light client bootstrap is saved
 		b, err := s.cfg.BeaconDB.LightClientBootstrap(ctx, currentBlockRoot[:])
@@ -3257,7 +3257,7 @@ func TestProcessLightClientBootstrap(t *testing.T) {
 			isValidPayload: true,
 		}
 
-		require.NoError(t, s.processLightClientBootstrap(cfg))
+		s.saveLightClientBootstrap(cfg)
 
 		// Check that the light client bootstrap is saved
 		b, err := s.cfg.BeaconDB.LightClientBootstrap(ctx, currentBlockRoot[:])
@@ -3292,7 +3292,7 @@ func TestProcessLightClientBootstrap(t *testing.T) {
 			isValidPayload: true,
 		}
 
-		require.NoError(t, s.processLightClientBootstrap(cfg))
+		s.saveLightClientBootstrap(cfg)
 
 		// Check that the light client bootstrap is saved
 		b, err := s.cfg.BeaconDB.LightClientBootstrap(ctx, currentBlockRoot[:])
@@ -3332,17 +3332,27 @@ func testIsAvailableSetup(t *testing.T, params testIsAvailableParams) (context.C
 	signedBeaconBlock, err := util.GenerateFullBlockFulu(genesisState, secretKeys, conf, 10 /*block slot*/)
 	require.NoError(t, err)
 
-	root, err := signedBeaconBlock.Block.HashTreeRoot()
+	block := signedBeaconBlock.Block
+	bodyRoot, err := block.Body.HashTreeRoot()
 	require.NoError(t, err)
 
-	dataColumnsParams := make([]util.DataColumnParams, 0, len(params.columnsToSave))
+	root, err := block.HashTreeRoot()
+	require.NoError(t, err)
+
+	dataColumnsParams := make([]util.DataColumnParam, 0, len(params.columnsToSave))
 	for _, i := range params.columnsToSave {
-		dataColumnParam := util.DataColumnParams{ColumnIndex: i}
+		dataColumnParam := util.DataColumnParam{
+			Index:         i,
+			Slot:          block.Slot,
+			ProposerIndex: block.ProposerIndex,
+			ParentRoot:    block.ParentRoot,
+			StateRoot:     block.StateRoot,
+			BodyRoot:      bodyRoot[:],
+		}
 		dataColumnsParams = append(dataColumnsParams, dataColumnParam)
 	}
 
-	dataColumnParamsByBlockRoot := util.DataColumnsParamsByRoot{root: dataColumnsParams}
-	_, verifiedRODataColumns := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
+	_, verifiedRODataColumns := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnsParams)
 
 	err = dataColumnStorage.Save(verifiedRODataColumns)
 	require.NoError(t, err)
@@ -3410,30 +3420,39 @@ func TestIsDataAvailable(t *testing.T) {
 		}
 
 		ctx, _, service, root, signed := testIsAvailableSetup(t, testParams)
+		block := signed.Block()
+		slot := block.Slot()
+		proposerIndex := block.ProposerIndex()
+		parentRoot := block.ParentRoot()
+		stateRoot := block.StateRoot()
+		bodyRoot, err := block.Body().HashTreeRoot()
+		require.NoError(t, err)
 
-		var wrongRoot [fieldparams.RootLength]byte
-		copy(wrongRoot[:], root[:])
-		wrongRoot[0]++ // change the root to simulate a wrong root
+		_, verifiedSidecarsWrongRoot := util.CreateTestVerifiedRoDataColumnSidecars(
+			t,
+			[]util.DataColumnParam{
+				{Index: 42, Slot: slot + 1}, // Needed index, but not for this slot.
+			})
 
-		_, verifiedSidecarsWrongRoot := util.CreateTestVerifiedRoDataColumnSidecars(t, util.DataColumnsParamsByRoot{wrongRoot: {
-			{ColumnIndex: 42}, // needed
-		}})
+		_, verifiedSidecars := util.CreateTestVerifiedRoDataColumnSidecars(t, []util.DataColumnParam{
+			{Index: 87, Slot: slot, ProposerIndex: proposerIndex, ParentRoot: parentRoot[:], StateRoot: stateRoot[:], BodyRoot: bodyRoot[:]}, // Needed index
+			{Index: 1, Slot: slot, ProposerIndex: proposerIndex, ParentRoot: parentRoot[:], StateRoot: stateRoot[:], BodyRoot: bodyRoot[:]},  // Not needed index
+			{Index: 42, Slot: slot, ProposerIndex: proposerIndex, ParentRoot: parentRoot[:], StateRoot: stateRoot[:], BodyRoot: bodyRoot[:]}, // Needed index
+		})
 
-		_, verifiedSidecars := util.CreateTestVerifiedRoDataColumnSidecars(t, util.DataColumnsParamsByRoot{root: {
-			{ColumnIndex: 87}, // needed
-			{ColumnIndex: 1},  // not needed
-			{ColumnIndex: 42}, // needed
-		}})
+		startWaiting := make(chan bool)
+
+		go func() {
+			<-startWaiting
 
-		time.AfterFunc(10*time.Millisecond, func() {
 			err := service.dataColumnStorage.Save(verifiedSidecarsWrongRoot)
 			require.NoError(t, err)
 
 			err = service.dataColumnStorage.Save(verifiedSidecars)
 			require.NoError(t, err)
-		})
+		}()
 
-		err := service.isDataAvailable(ctx, root, signed)
+		err = service.isDataAvailable(ctx, root, signed, startWaiting)
 		require.NoError(t, err)
 	})
 
@@ -3460,21 +3479,40 @@ func TestIsDataAvailable(t *testing.T) {
 		}
 
 		ctx, _, service, root, signed := testIsAvailableSetup(t, testParams)
+		block := signed.Block()
+		slot := block.Slot()
+		proposerIndex := block.ProposerIndex()
+		parentRoot := block.ParentRoot()
+		stateRoot := block.StateRoot()
+		bodyRoot, err := block.Body().HashTreeRoot()
+		require.NoError(t, err)
 
-		dataColumnParams := make([]util.DataColumnParams, 0, missingColumns)
+		dataColumnParams := make([]util.DataColumnParam, 0, missingColumns)
 		for i := minimumColumnsCountToReconstruct - missingColumns; i < minimumColumnsCountToReconstruct; i++ {
-			dataColumnParam := util.DataColumnParams{ColumnIndex: i}
+			dataColumnParam := util.DataColumnParam{
+				Index:         i,
+				Slot:          slot,
+				ProposerIndex: proposerIndex,
+				ParentRoot:    parentRoot[:],
+				StateRoot:     stateRoot[:],
+				BodyRoot:      bodyRoot[:],
+			}
+
 			dataColumnParams = append(dataColumnParams, dataColumnParam)
 		}
 
-		_, verifiedSidecars := util.CreateTestVerifiedRoDataColumnSidecars(t, util.DataColumnsParamsByRoot{root: dataColumnParams})
+		_, verifiedSidecars := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParams)
+
+		startWaiting := make(chan bool)
+
+		go func() {
+			<-startWaiting
 
-		time.AfterFunc(10*time.Millisecond, func() {
 			err := service.dataColumnStorage.Save(verifiedSidecars)
 			require.NoError(t, err)
-		})
+		}()
 
-		err := service.isDataAvailable(ctx, root, signed)
+		err = service.isDataAvailable(ctx, root, signed, startWaiting)
 		require.NoError(t, err)
 	})
 
@@ -3486,11 +3524,13 @@ func TestIsDataAvailable(t *testing.T) {
 
 		ctx, cancel, service, root, signed := testIsAvailableSetup(t, params)
 
-		time.AfterFunc(10*time.Millisecond, func() {
+		startWaiting := make(chan bool)
+		go func() {
+			<-startWaiting
 			cancel()
-		})
+		}()
 
-		err := service.isDataAvailable(ctx, root, signed)
+		err := service.isDataAvailable(ctx, root, signed, startWaiting)
 		require.NotNil(t, err)
 	})
 }

beacon-chain/blockchain/service.go

@@ -31,6 +31,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/stategen"
+	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"
@@ -109,22 +110,26 @@ var ErrMissingClockSetter = errors.New("blockchain Service initialized without a
 type blobNotifierMap struct {
 	sync.RWMutex
 	notifiers map[[32]byte]chan uint64
-	seenIndex map[[32]byte][]bool
+	// TODO: Separate blobs from data columns
+	// seenIndex map[[32]byte][]bool
+	seenIndex map[[32]byte][fieldparams.NumberOfColumns]bool
 }
 
 // notifyIndex notifies a blob by its index for a given root.
 // It uses internal maps to keep track of seen indices and notifier channels.
 func (bn *blobNotifierMap) notifyIndex(root [32]byte, idx uint64, slot primitives.Slot) {
-	maxBlobsPerBlock := params.BeaconConfig().MaxBlobsPerBlock(slot)
-	if idx >= uint64(maxBlobsPerBlock) {
-		return
-	}
+	// TODO: Separate blobs from data columns
+	// maxBlobsPerBlock := params.BeaconConfig().MaxBlobsPerBlock(slot)
+	// if idx >= uint64(maxBlobsPerBlock) {
+	// 	return
+	// }
 
 	bn.Lock()
 	seen := bn.seenIndex[root]
-	if seen == nil {
-		seen = make([]bool, maxBlobsPerBlock)
-	}
+	// TODO: Separate blobs from data columns
+	// if seen == nil {
+	// seen = make([]bool, maxBlobsPerBlock)
+	// }
 	if seen[idx] {
 		bn.Unlock()
 		return
@@ -135,7 +140,9 @@ func (bn *blobNotifierMap) notifyIndex(root [32]byte, idx uint64, slot primitive
 	// Retrieve or create the notifier channel for the given root.
 	c, ok := bn.notifiers[root]
 	if !ok {
-		c = make(chan uint64, maxBlobsPerBlock)
+		// TODO: Separate blobs from data columns
+		// c = make(chan uint64, maxBlobsPerBlock)
+		c = make(chan uint64, fieldparams.NumberOfColumns)
 		bn.notifiers[root] = c
 	}
 
@@ -145,12 +152,15 @@ func (bn *blobNotifierMap) notifyIndex(root [32]byte, idx uint64, slot primitive
 }
 
 func (bn *blobNotifierMap) forRoot(root [32]byte, slot primitives.Slot) chan uint64 {
-	maxBlobsPerBlock := params.BeaconConfig().MaxBlobsPerBlock(slot)
+	// TODO: Separate blobs from data columns
+	// maxBlobsPerBlock := params.BeaconConfig().MaxBlobsPerBlock(slot)
 	bn.Lock()
 	defer bn.Unlock()
 	c, ok := bn.notifiers[root]
 	if !ok {
-		c = make(chan uint64, maxBlobsPerBlock)
+		// TODO: Separate blobs from data columns
+		// c = make(chan uint64, maxBlobsPerBlock)
+		c = make(chan uint64, fieldparams.NumberOfColumns)
 		bn.notifiers[root] = c
 	}
 	return c
@@ -176,7 +186,9 @@ func NewService(ctx context.Context, opts ...Option) (*Service, error) {
 	ctx, cancel := context.WithCancel(ctx)
 	bn := &blobNotifierMap{
 		notifiers: make(map[[32]byte]chan uint64),
-		seenIndex: make(map[[32]byte][]bool),
+		// TODO: Separate blobs from data columns
+		// seenIndex: make(map[[32]byte][]bool),
+		seenIndex: make(map[[32]byte][fieldparams.NumberOfColumns]bool),
 	}
 	srv := &Service{
 		ctx:                  ctx,

beacon-chain/blockchain/service_test.go

@@ -587,7 +587,9 @@ func (s *MockClockSetter) SetClock(g *startup.Clock) error {
 func TestNotifyIndex(t *testing.T) {
 	// Initialize a blobNotifierMap
 	bn := &blobNotifierMap{
-		seenIndex: make(map[[32]byte][]bool),
+		// TODO: Separate blobs from data columns
+		// seenIndex: make(map[[32]byte][]bool),
+		seenIndex: make(map[[32]byte][fieldparams.NumberOfColumns]bool),
 		notifiers: make(map[[32]byte]chan uint64),
 	}
 

beacon-chain/core/altair/BUILD.bazel

@@ -81,7 +81,6 @@ go_test(
         "//proto/prysm/v1alpha1/attestation:go_default_library",
         "//runtime/version:go_default_library",
         "//testing/assert:go_default_library",
-        "//testing/fuzz:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
         "//time:go_default_library",

beacon-chain/core/altair/attestation_test.go

@@ -19,10 +19,9 @@ import (
 	"github.com/OffchainLabs/prysm/v6/math"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
-	"github.com/OffchainLabs/prysm/v6/testing/fuzz"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
-	gofuzz "github.com/google/gofuzz"
+	fuzz "github.com/google/gofuzz"
 	"github.com/prysmaticlabs/go-bitfield"
 )
 
@@ -459,7 +458,7 @@ func TestValidatorFlag_Add_ExceedsLength(t *testing.T) {
 }
 
 func TestFuzzProcessAttestationsNoVerify_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	st := &ethpb.BeaconStateAltair{}
 	b := &ethpb.SignedBeaconBlockAltair{Block: &ethpb.BeaconBlockAltair{}}
 	for i := 0; i < 10000; i++ {
@@ -479,7 +478,6 @@ func TestFuzzProcessAttestationsNoVerify_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, s, b)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 

beacon-chain/core/altair/deposit_fuzz_test.go

@@ -7,13 +7,12 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/altair"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v6/testing/fuzz"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	gofuzz "github.com/google/gofuzz"
+	fuzz "github.com/google/gofuzz"
 )
 
 func TestFuzzProcessDeposits_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconStateAltair{}
 	deposits := make([]*ethpb.Deposit, 100)
 	ctx := context.Background()
@@ -28,12 +27,11 @@ func TestFuzzProcessDeposits_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposits)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessPreGenesisDeposit_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconStateAltair{}
 	deposit := &ethpb.Deposit{}
 	ctx := context.Background()
@@ -47,12 +45,11 @@ func TestFuzzProcessPreGenesisDeposit_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposit)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessPreGenesisDeposit_Phase0_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	deposit := &ethpb.Deposit{}
 	ctx := context.Background()
@@ -66,12 +63,11 @@ func TestFuzzProcessPreGenesisDeposit_Phase0_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposit)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessDeposit_Phase0_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	deposit := &ethpb.Deposit{}
 
@@ -84,12 +80,11 @@ func TestFuzzProcessDeposit_Phase0_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposit)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessDeposit_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconStateAltair{}
 	deposit := &ethpb.Deposit{}
 
@@ -102,6 +97,5 @@ func TestFuzzProcessDeposit_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposit)
 		}
-		fuzz.FreeMemory(i)
 	}
 }

beacon-chain/core/blocks/BUILD.bazel

@@ -41,6 +41,7 @@ go_library(
         "//encoding/ssz:go_default_library",
         "//math:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
+        "//network/forks:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation:go_default_library",
@@ -104,7 +105,6 @@ go_test(
         "//proto/prysm/v1alpha1/attestation/aggregation/attestations:go_default_library",
         "//runtime/version:go_default_library",
         "//testing/assert:go_default_library",
-        "//testing/fuzz:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
         "//time/slots:go_default_library",

beacon-chain/core/blocks/attestation.go

@@ -178,7 +178,7 @@ func VerifyAttestationNoVerifySignature(
 		}
 	}
 
-	return attestation.IsValidAttestationIndices(ctx, indexedAtt, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot)
+	return attestation.IsValidAttestationIndices(ctx, indexedAtt)
 }
 
 // ProcessAttestationNoVerifySignature processes the attestation without verifying the attestation signature. This
@@ -243,7 +243,7 @@ func VerifyIndexedAttestation(ctx context.Context, beaconState state.ReadOnlyBea
 	ctx, span := trace.StartSpan(ctx, "core.VerifyIndexedAttestation")
 	defer span.End()
 
-	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot); err != nil {
+	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt); err != nil {
 		return err
 	}
 	domain, err := signing.Domain(

beacon-chain/core/blocks/block_operations_fuzz_test.go

@@ -11,13 +11,12 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v6/testing/fuzz"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	gofuzz "github.com/google/gofuzz"
+	fuzz "github.com/google/gofuzz"
 )
 
 func TestFuzzProcessAttestationNoVerify_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	ctx := context.Background()
 	state := &ethpb.BeaconState{}
 	att := &ethpb.Attestation{}
@@ -29,12 +28,11 @@ func TestFuzzProcessAttestationNoVerify_10000(t *testing.T) {
 		require.NoError(t, err)
 		_, err = ProcessAttestationNoVerifySignature(ctx, s, att)
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessBlockHeader_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	block := &ethpb.SignedBeaconBlock{}
 
@@ -51,12 +49,11 @@ func TestFuzzProcessBlockHeader_10000(t *testing.T) {
 		require.NoError(t, err)
 		_, err = ProcessBlockHeader(context.Background(), s, wsb)
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzverifyDepositDataSigningRoot_10000(_ *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	var ba []byte
 	var pubkey [fieldparams.BLSPubkeyLength]byte
 	var sig [96]byte
@@ -80,7 +77,7 @@ func TestFuzzverifyDepositDataSigningRoot_10000(_ *testing.T) {
 }
 
 func TestFuzzProcessEth1DataInBlock_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	e := &ethpb.Eth1Data{}
 	state, err := state_native.InitializeFromProtoUnsafePhase0(&ethpb.BeaconState{})
 	require.NoError(t, err)
@@ -95,7 +92,7 @@ func TestFuzzProcessEth1DataInBlock_10000(t *testing.T) {
 }
 
 func TestFuzzareEth1DataEqual_10000(_ *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	eth1data := &ethpb.Eth1Data{}
 	eth1data2 := &ethpb.Eth1Data{}
 
@@ -108,7 +105,7 @@ func TestFuzzareEth1DataEqual_10000(_ *testing.T) {
 }
 
 func TestFuzzEth1DataHasEnoughSupport_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	eth1data := &ethpb.Eth1Data{}
 	var stateVotes []*ethpb.Eth1Data
 	for i := 0; i < 100000; i++ {
@@ -125,7 +122,7 @@ func TestFuzzEth1DataHasEnoughSupport_10000(t *testing.T) {
 }
 
 func TestFuzzProcessBlockHeaderNoVerify_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	block := &ethpb.BeaconBlock{}
 
@@ -136,12 +133,11 @@ func TestFuzzProcessBlockHeaderNoVerify_10000(t *testing.T) {
 		require.NoError(t, err)
 		_, err = ProcessBlockHeaderNoVerify(context.Background(), s, block.Slot, block.ProposerIndex, block.ParentRoot, []byte{})
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessRandao_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	b := &ethpb.SignedBeaconBlock{}
 
@@ -159,12 +155,11 @@ func TestFuzzProcessRandao_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, b)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessRandaoNoVerify_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	blockBody := &ethpb.BeaconBlockBody{}
 
@@ -177,12 +172,11 @@ func TestFuzzProcessRandaoNoVerify_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, blockBody)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessProposerSlashings_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	p := &ethpb.ProposerSlashing{}
 	ctx := context.Background()
@@ -195,12 +189,11 @@ func TestFuzzProcessProposerSlashings_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and slashing: %v", r, err, state, p)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzVerifyProposerSlashing_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	proposerSlashing := &ethpb.ProposerSlashing{}
 	for i := 0; i < 10000; i++ {
@@ -210,12 +203,11 @@ func TestFuzzVerifyProposerSlashing_10000(t *testing.T) {
 		require.NoError(t, err)
 		err = VerifyProposerSlashing(s, proposerSlashing)
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessAttesterSlashings_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	a := &ethpb.AttesterSlashing{}
 	ctx := context.Background()
@@ -228,12 +220,11 @@ func TestFuzzProcessAttesterSlashings_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and slashing: %v", r, err, state, a)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzVerifyAttesterSlashing_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	attesterSlashing := &ethpb.AttesterSlashing{}
 	ctx := context.Background()
@@ -244,12 +235,11 @@ func TestFuzzVerifyAttesterSlashing_10000(t *testing.T) {
 		require.NoError(t, err)
 		err = VerifyAttesterSlashing(ctx, s, attesterSlashing)
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzIsSlashableAttestationData_10000(_ *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	attestationData := &ethpb.AttestationData{}
 	attestationData2 := &ethpb.AttestationData{}
 
@@ -261,7 +251,7 @@ func TestFuzzIsSlashableAttestationData_10000(_ *testing.T) {
 }
 
 func TestFuzzslashableAttesterIndices_10000(_ *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	attesterSlashing := &ethpb.AttesterSlashing{}
 
 	for i := 0; i < 10000; i++ {
@@ -271,7 +261,7 @@ func TestFuzzslashableAttesterIndices_10000(_ *testing.T) {
 }
 
 func TestFuzzProcessAttestationsNoVerify_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	b := &ethpb.SignedBeaconBlock{}
 	ctx := context.Background()
@@ -289,12 +279,11 @@ func TestFuzzProcessAttestationsNoVerify_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, b)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzVerifyIndexedAttestationn_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	idxAttestation := &ethpb.IndexedAttestation{}
 	ctx := context.Background()
@@ -305,12 +294,11 @@ func TestFuzzVerifyIndexedAttestationn_10000(t *testing.T) {
 		require.NoError(t, err)
 		err = VerifyIndexedAttestation(ctx, s, idxAttestation)
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzverifyDeposit_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	deposit := &ethpb.Deposit{}
 	for i := 0; i < 10000; i++ {
@@ -324,7 +312,7 @@ func TestFuzzverifyDeposit_10000(t *testing.T) {
 }
 
 func TestFuzzProcessVoluntaryExits_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	e := &ethpb.SignedVoluntaryExit{}
 	ctx := context.Background()
@@ -337,12 +325,11 @@ func TestFuzzProcessVoluntaryExits_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and exit: %v", r, err, state, e)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessVoluntaryExitsNoVerify_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconState{}
 	e := &ethpb.SignedVoluntaryExit{}
 	for i := 0; i < 10000; i++ {
@@ -354,12 +341,11 @@ func TestFuzzProcessVoluntaryExitsNoVerify_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, e)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzVerifyExit_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	ve := &ethpb.SignedVoluntaryExit{}
 	rawVal := &ethpb.Validator{}
 	fork := &ethpb.Fork{}

beacon-chain/core/blocks/signature.go

@@ -11,6 +11,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -95,12 +96,30 @@ func VerifyBlockHeaderSignature(beaconState state.BeaconState, header *ethpb.Sig
 	return signing.VerifyBlockHeaderSigningRoot(header.Header, proposerPubKey, header.Signature, domain)
 }
 
+func VerifyBlockHeaderSignatureUsingCurrentFork(beaconState state.BeaconState, header *ethpb.SignedBeaconBlockHeader) error {
+	currentEpoch := slots.ToEpoch(header.Header.Slot)
+	fork, err := forks.Fork(currentEpoch)
+	if err != nil {
+		return err
+	}
+	domain, err := signing.Domain(fork, currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
+	if err != nil {
+		return err
+	}
+	proposer, err := beaconState.ValidatorAtIndex(header.Header.ProposerIndex)
+	if err != nil {
+		return err
+	}
+	proposerPubKey := proposer.PublicKey
+	return signing.VerifyBlockHeaderSigningRoot(header.Header, proposerPubKey, header.Signature, domain)
+}
+
 // VerifyBlockSignatureUsingCurrentFork verifies the proposer signature of a beacon block. This differs
 // from the above method by not using fork data from the state and instead retrieving it
 // via the respective epoch.
 func VerifyBlockSignatureUsingCurrentFork(beaconState state.ReadOnlyBeaconState, blk interfaces.ReadOnlySignedBeaconBlock, blkRoot [32]byte) error {
 	currentEpoch := slots.ToEpoch(blk.Block().Slot())
-	fork, err := params.Fork(currentEpoch)
+	fork, err := forks.Fork(currentEpoch)
 	if err != nil {
 		return err
 	}
@@ -199,7 +218,7 @@ func createAttestationSignatureBatch(
 		if err != nil {
 			return nil, err
 		}
-		if err := attestation.IsValidAttestationIndices(ctx, ia, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot); err != nil {
+		if err := attestation.IsValidAttestationIndices(ctx, ia); err != nil {
 			return nil, err
 		}
 		indices := ia.GetAttestingIndices()

beacon-chain/core/electra/BUILD.bazel

@@ -85,7 +85,6 @@ go_test(
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//testing/assert:go_default_library",
-        "//testing/fuzz:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
         "//time/slots:go_default_library",

beacon-chain/core/electra/deposit_fuzz_test.go

@@ -7,13 +7,12 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/electra"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v6/testing/fuzz"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	gofuzz "github.com/google/gofuzz"
+	fuzz "github.com/google/gofuzz"
 )
 
 func TestFuzzProcessDeposits_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconStateElectra{}
 	deposits := make([]*ethpb.Deposit, 100)
 	ctx := context.Background()
@@ -28,12 +27,11 @@ func TestFuzzProcessDeposits_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposits)
 		}
-		fuzz.FreeMemory(i)
 	}
 }
 
 func TestFuzzProcessDeposit_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	state := &ethpb.BeaconStateElectra{}
 	deposit := &ethpb.Deposit{}
 
@@ -46,6 +44,5 @@ func TestFuzzProcessDeposit_10000(t *testing.T) {
 		if err != nil && r != nil {
 			t.Fatalf("return value should be nil on err. found: %v on error: %v for state: %v and block: %v", r, err, state, deposit)
 		}
-		fuzz.FreeMemory(i)
 	}
 }

beacon-chain/core/epoch/BUILD.bazel

@@ -48,7 +48,6 @@ go_test(
         "//consensus-types/primitives:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//testing/assert:go_default_library",
-        "//testing/fuzz:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
         "@com_github_google_go_cmp//cmp:go_default_library",

beacon-chain/core/epoch/epoch_processing_fuzz_test.go

@@ -5,13 +5,12 @@ import (
 
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v6/testing/fuzz"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
-	gofuzz "github.com/google/gofuzz"
+	fuzz "github.com/google/gofuzz"
 )
 
 func TestFuzzFinalUpdates_10000(t *testing.T) {
-	fuzzer := gofuzz.NewWithSeed(0)
+	fuzzer := fuzz.NewWithSeed(0)
 	base := &ethpb.BeaconState{}
 
 	for i := 0; i < 10000; i++ {
@@ -20,6 +19,5 @@ func TestFuzzFinalUpdates_10000(t *testing.T) {
 		require.NoError(t, err)
 		_, err = ProcessFinalUpdates(s)
 		_ = err
-		fuzz.FreeMemory(i)
 	}
 }

beacon-chain/core/feed/operation/BUILD.bazel

@@ -12,7 +12,6 @@ go_library(
         "//async/event:go_default_library",
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/interfaces:go_default_library",
-        "//consensus-types/primitives:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
     ],
 )

beacon-chain/core/feed/operation/events.go

@@ -4,7 +4,6 @@ package operation
 import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
-	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 )
 
@@ -38,11 +37,11 @@ const (
 	// SingleAttReceived is sent after a single attestation object is received from gossip or rpc
 	SingleAttReceived = 9
 
-	// BlockGossipReceived is sent after a block has been received from gossip or API that passes validation rules.
-	BlockGossipReceived = 10
+	// DataColumnSidecarReceived is sent after a data column sidecar is received from gossip or rpc.
+	DataColumnSidecarReceived = 10
 
-	// DataColumnReceived is sent after a data column has been seen after gossip validation rules.
-	DataColumnReceived = 11
+	// BlockGossipReceived is sent after a block has been received from gossip or API that passes validation rules.
+	BlockGossipReceived = 11
 )
 
 // UnAggregatedAttReceivedData is the data sent with UnaggregatedAttReceived events.
@@ -94,15 +93,13 @@ type SingleAttReceivedData struct {
 	Attestation ethpb.Att
 }
 
+// DataColumnSidecarReceivedData is the data sent with DataColumnSidecarReceived events.
+type DataColumnSidecarReceivedData struct {
+	DataColumn *blocks.VerifiedRODataColumn
+}
+
 // BlockGossipReceivedData is the data sent with BlockGossipReceived events.
 type BlockGossipReceivedData struct {
 	// SignedBlock is the block that was received.
 	SignedBlock interfaces.ReadOnlySignedBeaconBlock
 }
-
-type DataColumnReceivedData struct {
-	Slot           primitives.Slot
-	Index          uint64
-	BlockRoot      [32]byte
-	KzgCommitments [][]byte
-}

beacon-chain/core/fulu/BUILD.bazel

@@ -2,23 +2,33 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
-    srcs = ["upgrade.go"],
+    srcs = [
+        "transition.go",
+        "upgrade.go",
+    ],
     importpath = "github.com/OffchainLabs/prysm/v6/beacon-chain/core/fulu",
     visibility = ["//visibility:public"],
     deps = [
+        "//beacon-chain/core/electra:go_default_library",
+        "//beacon-chain/core/helpers:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
         "//config/params:go_default_library",
+        "//monitoring/tracing/trace:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//time/slots:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
     ],
 )
 
 go_test(
     name = "go_default_test",
-    srcs = ["upgrade_test.go"],
+    srcs = [
+        "transition_test.go",
+        "upgrade_test.go",
+    ],
     deps = [
         ":go_default_library",
         "//beacon-chain/core/time:go_default_library",

beacon-chain/core/fulu/transition.go

@@ -0,0 +1,47 @@
+package fulu
+
+import (
+	"context"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/electra"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
+	"github.com/OffchainLabs/prysm/v6/time/slots"
+	"github.com/pkg/errors"
+)
+
+func ProcessEpoch(ctx context.Context, state state.BeaconState) error {
+	if err := electra.ProcessEpoch(ctx, state); err != nil {
+		return errors.Wrap(err, "could not process epoch in fulu transition")
+	}
+	return processProposerLookahead(ctx, state)
+}
+
+func processProposerLookahead(ctx context.Context, state state.BeaconState) error {
+	_, span := trace.StartSpan(ctx, "fulu.processProposerLookahead")
+	defer span.End()
+
+	if state == nil || state.IsNil() {
+		return errors.New("nil state")
+	}
+
+	lookAhead, err := state.ProposerLookahead()
+	if err != nil {
+		return errors.Wrap(err, "could not get proposer lookahead")
+	}
+	lastEpochStart := len(lookAhead) - int(params.BeaconConfig().SlotsPerEpoch)
+	copy(lookAhead[:lastEpochStart], lookAhead[params.BeaconConfig().SlotsPerEpoch:])
+	lastEpoch := slots.ToEpoch(state.Slot()) + params.BeaconConfig().MinSeedLookahead + 1
+	indices, err := helpers.ActiveValidatorIndices(ctx, state, lastEpoch)
+	if err != nil {
+		return err
+	}
+	lastEpochProposers, err := helpers.PrecomputeProposerIndices(state, indices, lastEpoch)
+	if err != nil {
+		return errors.Wrap(err, "could not precompute proposer indices")
+	}
+	copy(lookAhead[lastEpochStart:], lastEpochProposers)
+	return state.SetProposerLookahead(lookAhead)
+}

beacon-chain/core/fulu/transition_test.go

@@ -0,0 +1,28 @@
+package fulu_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/fulu"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/util"
+)
+
+func TestProcessEpoch_CanProcessFulu(t *testing.T) {
+	st, _ := util.DeterministicGenesisStateElectra(t, params.BeaconConfig().MaxValidatorsPerCommittee)
+	require.NoError(t, st.SetSlot(10*params.BeaconConfig().SlotsPerEpoch))
+	st, err := fulu.UpgradeToFulu(context.Background(), st)
+	require.NoError(t, err)
+	preLookahead, err := st.ProposerLookahead()
+	require.NoError(t, err)
+	err = fulu.ProcessEpoch(context.Background(), st)
+	require.NoError(t, err)
+	postLookahead, err := st.ProposerLookahead()
+	require.NoError(t, err)
+	require.NotEqual(t, preLookahead[0], postLookahead[0])
+	for i, v := range preLookahead[params.BeaconConfig().SlotsPerEpoch:] {
+		require.Equal(t, v, postLookahead[i])
+	}
+}

beacon-chain/core/fulu/upgrade.go

@@ -1,18 +1,22 @@
 package fulu
 
 import (
+	"context"
+
+	"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"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
 )
 
 // UpgradeToFulu updates inputs a generic state to return the version Fulu state.
 // https://github.com/ethereum/consensus-specs/blob/v1.5.0-beta.5/specs/fulu/fork.md#upgrading-the-state
-func UpgradeToFulu(beaconState state.BeaconState) (state.BeaconState, error) {
+func UpgradeToFulu(ctx context.Context, beaconState state.BeaconState) (state.BeaconState, error) {
 	currentSyncCommittee, err := beaconState.CurrentSyncCommittee()
 	if err != nil {
 		return nil, err
@@ -101,8 +105,12 @@ func UpgradeToFulu(beaconState state.BeaconState) (state.BeaconState, error) {
 	if err != nil {
 		return nil, err
 	}
+	proposerLookahead, err := helpers.InitializeProposerLookahead(ctx, beaconState, slots.ToEpoch(beaconState.Slot()))
+	if err != nil {
+		return nil, err
+	}
 
-	s := &ethpb.BeaconStateElectra{
+	s := &ethpb.BeaconStateFulu{
 		GenesisTime:           beaconState.GenesisTime(),
 		GenesisValidatorsRoot: beaconState.GenesisValidatorsRoot(),
 		Slot:                  beaconState.Slot(),
@@ -163,6 +171,7 @@ func UpgradeToFulu(beaconState state.BeaconState) (state.BeaconState, error) {
 		PendingDeposits:               pendingDeposits,
 		PendingPartialWithdrawals:     pendingPartialWithdrawals,
 		PendingConsolidations:         pendingConsolidations,
+		ProposerLookahead:             proposerLookahead,
 	}
 
 	// Need to cast the beaconState to use in helper functions

beacon-chain/core/fulu/upgrade_test.go

@@ -25,7 +25,7 @@ func TestUpgradeToFulu(t *testing.T) {
 	require.NoError(t, st.SetBalances(bals))
 
 	preForkState := st.Copy()
-	mSt, err := fulu.UpgradeToFulu(st)
+	mSt, err := fulu.UpgradeToFulu(t.Context(), st)
 	require.NoError(t, err)
 
 	require.Equal(t, preForkState.GenesisTime(), mSt.GenesisTime())

beacon-chain/core/helpers/beacon_committee.go

@@ -555,21 +555,31 @@ func UpdateProposerIndicesInCache(ctx context.Context, state state.ReadOnlyBeaco
 	if err != nil {
 		return err
 	}
-	// Skip cache update if the key already exists
-	_, ok := proposerIndicesCache.ProposerIndices(epoch, [32]byte(root))
-	if ok {
-		return nil
-	}
-	indices, err := ActiveValidatorIndices(ctx, state, epoch)
-	if err != nil {
-		return err
-	}
-	proposerIndices, err := PrecomputeProposerIndices(state, indices, epoch)
-	if err != nil {
-		return err
-	}
-	if len(proposerIndices) != int(params.BeaconConfig().SlotsPerEpoch) {
-		return errors.New("invalid proposer length returned from state")
+	var proposerIndices []primitives.ValidatorIndex
+	// use the state if post fulu (EIP-7917)
+	if state.Version() >= version.Fulu {
+		lookAhead, err := state.ProposerLookahead()
+		if err != nil {
+			return errors.Wrap(err, "could not get proposer lookahead")
+		}
+		proposerIndices = lookAhead[:params.BeaconConfig().SlotsPerEpoch]
+	} else {
+		// Skip cache update if the key already exists
+		_, ok := proposerIndicesCache.ProposerIndices(epoch, [32]byte(root))
+		if ok {
+			return nil
+		}
+		indices, err := ActiveValidatorIndices(ctx, state, epoch)
+		if err != nil {
+			return err
+		}
+		proposerIndices, err = PrecomputeProposerIndices(state, indices, epoch)
+		if err != nil {
+			return err
+		}
+		if len(proposerIndices) != int(params.BeaconConfig().SlotsPerEpoch) {
+			return errors.New("invalid proposer length returned from state")
+		}
 	}
 	// This is here to deal with tests only
 	var indicesArray [fieldparams.SlotsPerEpoch]primitives.ValidatorIndex
@@ -656,6 +666,25 @@ func ComputeCommittee(
 	return shuffledList[start:end], nil
 }
 
+// InitializeProposerLookahead computes the list of the proposer indices for the next MIN_SEED_LOOKAHEAD + 1 epochs.
+func InitializeProposerLookahead(ctx context.Context, state state.ReadOnlyBeaconState, epoch primitives.Epoch) ([]uint64, error) {
+	lookAhead := make([]uint64, 0, uint64(params.BeaconConfig().MinSeedLookahead+1)*uint64(params.BeaconConfig().SlotsPerEpoch))
+	indices, err := ActiveValidatorIndices(ctx, state, epoch)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get active indices")
+	}
+	for i := range params.BeaconConfig().MinSeedLookahead + 1 {
+		proposerIndices, err := PrecomputeProposerIndices(state, indices, epoch+i)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not compute proposer indices")
+		}
+		for _, proposerIndex := range proposerIndices {
+			lookAhead = append(lookAhead, uint64(proposerIndex))
+		}
+	}
+	return lookAhead, nil
+}
+
 // PrecomputeProposerIndices computes proposer indices of the current epoch and returns a list of proposer indices,
 // the index of the list represents the slot number.
 func PrecomputeProposerIndices(state state.ReadOnlyBeaconState, activeIndices []primitives.ValidatorIndex, e primitives.Epoch) ([]primitives.ValidatorIndex, error) {

beacon-chain/core/helpers/sync_committee_test.go

@@ -78,6 +78,7 @@ func TestIsCurrentEpochSyncCommittee_UsingCommittee(t *testing.T) {
 
 func TestIsCurrentEpochSyncCommittee_DoesNotExist(t *testing.T) {
 	helpers.ClearCache()
+	params.SetupTestConfigCleanup(t)
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -264,6 +265,7 @@ func TestCurrentEpochSyncSubcommitteeIndices_UsingCommittee(t *testing.T) {
 }
 
 func TestCurrentEpochSyncSubcommitteeIndices_DoesNotExist(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
 	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)

beacon-chain/core/helpers/validators.go

@@ -299,9 +299,29 @@ func ProposerIndexAtSlotFromCheckpoint(c *forkchoicetypes.Checkpoint, slot primi
 	return proposerIndices[slot%params.BeaconConfig().SlotsPerEpoch], nil
 }
 
+func beaconProposerIndexAtSlotFulu(state state.ReadOnlyBeaconState, slot primitives.Slot) (primitives.ValidatorIndex, error) {
+	e := slots.ToEpoch(slot)
+	stateEpoch := slots.ToEpoch(state.Slot())
+	if e < stateEpoch || e > stateEpoch+1 {
+		return 0, errors.Errorf("slot %d is not in the current epoch %d or the next epoch", slot, stateEpoch)
+	}
+	lookAhead, err := state.ProposerLookahead()
+	if err != nil {
+		return 0, errors.Wrap(err, "could not get proposer lookahead")
+	}
+	if e == stateEpoch {
+		return lookAhead[slot%params.BeaconConfig().SlotsPerEpoch], nil
+	}
+	// The caller is requesting the proposer for the next epoch
+	return lookAhead[slot%params.BeaconConfig().SlotsPerEpoch+params.BeaconConfig().SlotsPerEpoch], nil
+}
+
 // BeaconProposerIndexAtSlot returns proposer index at the given slot from the
 // point of view of the given state as head state
 func BeaconProposerIndexAtSlot(ctx context.Context, state state.ReadOnlyBeaconState, slot primitives.Slot) (primitives.ValidatorIndex, error) {
+	if state.Version() >= version.Fulu {
+		return beaconProposerIndexAtSlotFulu(state, slot)
+	}
 	e := slots.ToEpoch(slot)
 	// The cache uses the state root of the previous epoch - minimum_seed_lookahead last slot as key. (e.g. Starting epoch 1, slot 32, the key would be block root at slot 31)
 	// For simplicity, the node will skip caching of genesis epoch.

beacon-chain/core/helpers/validators_test.go

@@ -1171,3 +1171,29 @@ func TestValidatorMaxEffectiveBalance(t *testing.T) {
 	// Sanity check that MinActivationBalance equals (pre-electra) MaxEffectiveBalance
 	assert.Equal(t, params.BeaconConfig().MinActivationBalance, params.BeaconConfig().MaxEffectiveBalance)
 }
+
+func TestBeaconProposerIndexAtSlotFulu(t *testing.T) {
+	lookahead := make([]uint64, 64)
+	lookahead[0] = 15
+	lookahead[1] = 16
+	lookahead[34] = 42
+	pbState := ethpb.BeaconStateFulu{
+		Slot:              100,
+		ProposerLookahead: lookahead,
+	}
+	st, err := state_native.InitializeFromProtoFulu(&pbState)
+	require.NoError(t, err)
+	idx, err := helpers.BeaconProposerIndexAtSlot(t.Context(), st, 96)
+	require.NoError(t, err)
+	require.Equal(t, primitives.ValidatorIndex(15), idx)
+	idx, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 97)
+	require.NoError(t, err)
+	require.Equal(t, primitives.ValidatorIndex(16), idx)
+	idx, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 130)
+	require.NoError(t, err)
+	require.Equal(t, primitives.ValidatorIndex(42), idx)
+	_, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 95)
+	require.ErrorContains(t, "slot 95 is not in the current epoch 3 or the next epoch", err)
+	_, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 160)
+	require.ErrorContains(t, "slot 160 is not in the current epoch 3 or the next epoch", err)
+}

beacon-chain/core/peerdas/BUILD.bazel

@@ -7,6 +7,7 @@ go_library(
         "info.go",
         "metrics.go",
         "p2p_interface.go",
+        "peer_sampling.go",
         "reconstruction.go",
         "validator.go",
         "verification.go",
@@ -44,6 +45,7 @@ go_test(
         "das_core_test.go",
         "info_test.go",
         "p2p_interface_test.go",
+        "peer_sampling_test.go",
         "reconstruction_test.go",
         "utils_test.go",
         "validator_test.go",

beacon-chain/core/peerdas/peer_sampling.go

@@ -0,0 +1,56 @@
+package peerdas
+
+import (
+	"math/big"
+
+	"github.com/OffchainLabs/prysm/v6/config/params"
+)
+
+// ExtendedSampleCount computes, for a given number of samples per slot and allowed failures the
+// number of samples we should actually query from peers.
+// https://github.com/ethereum/consensus-specs/blob/v1.5.0-beta.5/specs/fulu/peer-sampling.md#get_extended_sample_count
+func ExtendedSampleCount(samplesPerSlot, allowedFailures uint64) uint64 {
+	// Retrieve the columns count
+	columnsCount := params.BeaconConfig().NumberOfColumns
+
+	// If half of the columns are missing, we are able to reconstruct the data.
+	// If half of the columns + 1 are missing, we are not able to reconstruct the data.
+	// This is the smallest worst case.
+	worstCaseMissing := columnsCount/2 + 1
+
+	// Compute the false positive threshold.
+	falsePositiveThreshold := HypergeomCDF(0, columnsCount, worstCaseMissing, samplesPerSlot)
+
+	var sampleCount uint64
+
+	// Finally, compute the extended sample count.
+	for sampleCount = samplesPerSlot; sampleCount < columnsCount+1; sampleCount++ {
+		if HypergeomCDF(allowedFailures, columnsCount, worstCaseMissing, sampleCount) <= falsePositiveThreshold {
+			break
+		}
+	}
+
+	return sampleCount
+}
+
+// HypergeomCDF computes the hypergeometric cumulative distribution function.
+// https://en.wikipedia.org/wiki/Hypergeometric_distribution
+func HypergeomCDF(k, M, n, N uint64) float64 {
+	denominatorInt := new(big.Int).Binomial(int64(M), int64(N)) // lint:ignore uintcast
+	denominator := new(big.Float).SetInt(denominatorInt)
+
+	rBig := big.NewFloat(0)
+
+	for i := uint64(0); i < k+1; i++ {
+		a := new(big.Int).Binomial(int64(n), int64(i)) // lint:ignore uintcast
+		b := new(big.Int).Binomial(int64(M-n), int64(N-i))
+		numeratorInt := new(big.Int).Mul(a, b)
+		numerator := new(big.Float).SetInt(numeratorInt)
+		item := new(big.Float).Quo(numerator, denominator)
+		rBig.Add(rBig, item)
+	}
+
+	r, _ := rBig.Float64()
+
+	return r
+}

beacon-chain/core/peerdas/peer_sampling_test.go

@@ -0,0 +1,60 @@
+package peerdas_test
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+)
+
+func TestExtendedSampleCount(t *testing.T) {
+	const samplesPerSlot = 16
+
+	testCases := []struct {
+		name                string
+		allowedMissings     uint64
+		extendedSampleCount uint64
+	}{
+		{name: "allowedMissings=0", allowedMissings: 0, extendedSampleCount: 16},
+		{name: "allowedMissings=1", allowedMissings: 1, extendedSampleCount: 20},
+		{name: "allowedMissings=2", allowedMissings: 2, extendedSampleCount: 24},
+		{name: "allowedMissings=3", allowedMissings: 3, extendedSampleCount: 27},
+		{name: "allowedMissings=4", allowedMissings: 4, extendedSampleCount: 29},
+		{name: "allowedMissings=5", allowedMissings: 5, extendedSampleCount: 32},
+		{name: "allowedMissings=6", allowedMissings: 6, extendedSampleCount: 35},
+		{name: "allowedMissings=7", allowedMissings: 7, extendedSampleCount: 37},
+		{name: "allowedMissings=8", allowedMissings: 8, extendedSampleCount: 40},
+		{name: "allowedMissings=9", allowedMissings: 9, extendedSampleCount: 42},
+		{name: "allowedMissings=10", allowedMissings: 10, extendedSampleCount: 44},
+		{name: "allowedMissings=11", allowedMissings: 11, extendedSampleCount: 47},
+		{name: "allowedMissings=12", allowedMissings: 12, extendedSampleCount: 49},
+		{name: "allowedMissings=13", allowedMissings: 13, extendedSampleCount: 51},
+		{name: "allowedMissings=14", allowedMissings: 14, extendedSampleCount: 53},
+		{name: "allowedMissings=15", allowedMissings: 15, extendedSampleCount: 55},
+		{name: "allowedMissings=16", allowedMissings: 16, extendedSampleCount: 57},
+		{name: "allowedMissings=17", allowedMissings: 17, extendedSampleCount: 59},
+		{name: "allowedMissings=18", allowedMissings: 18, extendedSampleCount: 61},
+		{name: "allowedMissings=19", allowedMissings: 19, extendedSampleCount: 63},
+		{name: "allowedMissings=20", allowedMissings: 20, extendedSampleCount: 65},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			result := peerdas.ExtendedSampleCount(samplesPerSlot, tc.allowedMissings)
+			require.Equal(t, tc.extendedSampleCount, result)
+		})
+	}
+}
+
+func TestHypergeomCDF(t *testing.T) {
+	// Test case from https://en.wikipedia.org/wiki/Hypergeometric_distribution
+	// Population size: 1000, number of successes in population: 500, sample size: 10, number of successes in sample: 5
+	// Expected result: 0.072
+	const (
+		expected = 0.0796665913283742
+		margin   = 0.000001
+	)
+
+	actual := peerdas.HypergeomCDF(5, 128, 65, 16)
+	require.Equal(t, true, expected-margin <= actual && actual <= expected+margin)
+}

beacon-chain/core/peerdas/validator_test.go

@@ -44,7 +44,7 @@ func TestValidatorsCustodyRequirement(t *testing.T) {
 				validatorsIndex[primitives.ValidatorIndex(i)] = true
 			}
 
-			beaconState, err := state_native.InitializeFromProtoFulu(&ethpb.BeaconStateElectra{Validators: validators})
+			beaconState, err := state_native.InitializeFromProtoFulu(&ethpb.BeaconStateFulu{Validators: validators})
 			require.NoError(t, err)
 
 			actual, err := peerdas.ValidatorsCustodyRequirement(beaconState, validatorsIndex)

beacon-chain/core/signing/BUILD.bazel

@@ -4,6 +4,7 @@ go_library(
     name = "go_default_library",
     srcs = [
         "domain.go",
+        "signature.go",
         "signing_root.go",
     ],
     importpath = "github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing",
@@ -24,6 +25,7 @@ go_test(
     name = "go_default_test",
     srcs = [
         "domain_test.go",
+        "signature_test.go",
         "signing_root_test.go",
     ],
     embed = [":go_default_library"],

beacon-chain/core/signing/signature.go

@@ -0,0 +1,34 @@
+package signing
+
+import (
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/pkg/errors"
+)
+
+var ErrNilRegistration = errors.New("nil signed registration")
+
+// VerifyRegistrationSignature verifies the signature of a validator's registration.
+func VerifyRegistrationSignature(
+	sr *ethpb.SignedValidatorRegistrationV1,
+) error {
+	if sr == nil || sr.Message == nil {
+		return ErrNilRegistration
+	}
+
+	d := params.BeaconConfig().DomainApplicationBuilder
+	// Per spec, we want the fork version and genesis validator to be nil.
+	// Which is genesis value and zero by default.
+	sd, err := ComputeDomain(
+		d,
+		nil, /* fork version */
+		nil /* genesis val root */)
+	if err != nil {
+		return err
+	}
+
+	if err := VerifySigningRoot(sr.Message, sr.Message.Pubkey, sr.Signature, sd); err != nil {
+		return ErrSigFailedToVerify
+	}
+	return nil
+}

beacon-chain/core/signing/signature_test.go

@@ -0,0 +1,42 @@
+package signing_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/crypto/bls"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+)
+
+func TestVerifyRegistrationSignature(t *testing.T) {
+	sk, err := bls.RandKey()
+	require.NoError(t, err)
+	reg := &ethpb.ValidatorRegistrationV1{
+		FeeRecipient: bytesutil.PadTo([]byte("fee"), 20),
+		GasLimit:     123456,
+		Timestamp:    uint64(time.Now().Unix()),
+		Pubkey:       sk.PublicKey().Marshal(),
+	}
+	d := params.BeaconConfig().DomainApplicationBuilder
+	domain, err := signing.ComputeDomain(d, nil, nil)
+	require.NoError(t, err)
+	sr, err := signing.ComputeSigningRoot(reg, domain)
+	require.NoError(t, err)
+	sk.Sign(sr[:]).Marshal()
+
+	sReg := &ethpb.SignedValidatorRegistrationV1{
+		Message:   reg,
+		Signature: sk.Sign(sr[:]).Marshal(),
+	}
+	require.NoError(t, signing.VerifyRegistrationSignature(sReg))
+
+	sReg.Signature = []byte("bad")
+	require.ErrorIs(t, signing.VerifyRegistrationSignature(sReg), signing.ErrSigFailedToVerify)
+
+	sReg.Message = nil
+	require.ErrorIs(t, signing.VerifyRegistrationSignature(sReg), signing.ErrNilRegistration)
+}

beacon-chain/core/time/slot_epoch.go

@@ -53,6 +53,11 @@ func HigherEqualThanAltairVersionAndEpoch(s state.BeaconState, e primitives.Epoc
 	return s.Version() >= version.Altair && e >= params.BeaconConfig().AltairForkEpoch
 }
 
+// PeerDASIsActive checks whether peerDAS is active at the provided slot.
+func PeerDASIsActive(slot primitives.Slot) bool {
+	return params.FuluEnabled() && slots.ToEpoch(slot) >= params.BeaconConfig().FuluForkEpoch
+}
+
 // CanUpgradeToAltair returns true if the input `slot` can upgrade to Altair.
 // Spec code:
 // If state.slot % SLOTS_PER_EPOCH == 0 and compute_epoch_at_slot(state.slot) == ALTAIR_FORK_EPOCH

beacon-chain/core/transition/transition.go

@@ -303,7 +303,11 @@ func ProcessSlotsCore(ctx context.Context, span trace.Span, state state.BeaconSt
 func ProcessEpoch(ctx context.Context, state state.BeaconState) (state.BeaconState, error) {
 	var err error
 	if time.CanProcessEpoch(state) {
-		if state.Version() >= version.Electra {
+		if state.Version() >= version.Fulu {
+			if err = fulu.ProcessEpoch(ctx, state); err != nil {
+				return nil, errors.Wrap(err, fmt.Sprintf("could not process %s epoch", version.String(state.Version())))
+			}
+		} else if state.Version() >= version.Electra {
 			if err = electra.ProcessEpoch(ctx, state); err != nil {
 				return nil, errors.Wrap(err, fmt.Sprintf("could not process %s epoch", version.String(state.Version())))
 			}
@@ -377,7 +381,7 @@ func UpgradeState(ctx context.Context, state state.BeaconState) (state.BeaconSta
 	}
 
 	if time.CanUpgradeToFulu(slot) {
-		state, err = fulu.UpgradeToFulu(state)
+		state, err = fulu.UpgradeToFulu(ctx, state)
 		if err != nil {
 			tracing.AnnotateError(span, err)
 			return nil, err

beacon-chain/das/availability_columns_test.go

@@ -38,9 +38,9 @@ func TestPersist(t *testing.T) {
 	t.Run("mixed roots", func(t *testing.T) {
 		dataColumnStorage := filesystem.NewEphemeralDataColumnStorage(t)
 
-		dataColumnParamsByBlockRoot := map[[fieldparams.RootLength]byte][]util.DataColumnParams{
-			{1}: {{ColumnIndex: 1}},
-			{2}: {{ColumnIndex: 2}},
+		dataColumnParamsByBlockRoot := []util.DataColumnParam{
+			{Slot: 1, Index: 1},
+			{Slot: 2, Index: 2},
 		}
 
 		roSidecars, _ := roSidecarsFromDataColumnParamsByBlockRoot(t, dataColumnParamsByBlockRoot)
@@ -54,8 +54,8 @@ func TestPersist(t *testing.T) {
 	t.Run("outside DA period", func(t *testing.T) {
 		dataColumnStorage := filesystem.NewEphemeralDataColumnStorage(t)
 
-		dataColumnParamsByBlockRoot := map[[fieldparams.RootLength]byte][]util.DataColumnParams{
-			{1}: {{ColumnIndex: 1}},
+		dataColumnParamsByBlockRoot := []util.DataColumnParam{
+			{Slot: 1, Index: 1},
 		}
 
 		roSidecars, _ := roSidecarsFromDataColumnParamsByBlockRoot(t, dataColumnParamsByBlockRoot)
@@ -67,21 +67,24 @@ func TestPersist(t *testing.T) {
 	})
 
 	t.Run("nominal", func(t *testing.T) {
+		const slot = 42
 		dataColumnStorage := filesystem.NewEphemeralDataColumnStorage(t)
 
-		dataColumnParamsByBlockRoot := map[[fieldparams.RootLength]byte][]util.DataColumnParams{
-			{}: {{ColumnIndex: 1}, {ColumnIndex: 5}},
+		dataColumnParamsByBlockRoot := []util.DataColumnParam{
+			{Slot: slot, Index: 1},
+			{Slot: slot, Index: 5},
 		}
 
 		roSidecars, roDataColumns := roSidecarsFromDataColumnParamsByBlockRoot(t, dataColumnParamsByBlockRoot)
 		lazilyPersistentStoreColumns := NewLazilyPersistentStoreColumn(dataColumnStorage, enode.ID{}, nil, &peerdas.CustodyInfo{})
 
-		err := lazilyPersistentStoreColumns.Persist(0, roSidecars...)
+		err := lazilyPersistentStoreColumns.Persist(slot, roSidecars...)
 		require.NoError(t, err)
 		require.Equal(t, 1, len(lazilyPersistentStoreColumns.cache.entries))
 
-		key := cacheKey{slot: 0, root: [fieldparams.RootLength]byte{}}
-		entry := lazilyPersistentStoreColumns.cache.entries[key]
+		key := cacheKey{slot: slot, root: roDataColumns[0].BlockRoot()}
+		entry, ok := lazilyPersistentStoreColumns.cache.entries[key]
+		require.Equal(t, true, ok)
 
 		// A call to Persist does NOT save the sidecars to disk.
 		require.Equal(t, uint64(0), entry.diskSummary.Count())
@@ -121,24 +124,37 @@ func TestIsDataAvailable(t *testing.T) {
 		signedBeaconBlockFulu := util.NewBeaconBlockFulu()
 		signedBeaconBlockFulu.Block.Body.BlobKzgCommitments = commitments
 		signedRoBlock := newSignedRoBlock(t, signedBeaconBlockFulu)
+		block := signedRoBlock.Block()
+		slot := block.Slot()
+		proposerIndex := block.ProposerIndex()
+		parentRoot := block.ParentRoot()
+		stateRoot := block.StateRoot()
+		bodyRoot, err := block.Body().HashTreeRoot()
+		require.NoError(t, err)
+
 		root := signedRoBlock.Root()
 
 		dataColumnStorage := filesystem.NewEphemeralDataColumnStorage(t)
 		lazilyPersistentStoreColumns := NewLazilyPersistentStoreColumn(dataColumnStorage, enode.ID{}, newDataColumnsVerifier, &peerdas.CustodyInfo{})
 
 		indices := [...]uint64{1, 17, 87, 102}
-		dataColumnsParams := make([]util.DataColumnParams, 0, len(indices))
+		dataColumnsParams := make([]util.DataColumnParam, 0, len(indices))
 		for _, index := range indices {
-			dataColumnParams := util.DataColumnParams{
-				ColumnIndex:    index,
+			dataColumnParams := util.DataColumnParam{
+				Index:          index,
 				KzgCommitments: commitments,
+
+				Slot:          slot,
+				ProposerIndex: proposerIndex,
+				ParentRoot:    parentRoot[:],
+				StateRoot:     stateRoot[:],
+				BodyRoot:      bodyRoot[:],
 			}
 
 			dataColumnsParams = append(dataColumnsParams, dataColumnParams)
 		}
 
-		dataColumnsParamsByBlockRoot := util.DataColumnsParamsByRoot{root: dataColumnsParams}
-		_, verifiedRoDataColumns := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnsParamsByBlockRoot)
+		_, verifiedRoDataColumns := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnsParams)
 
 		key := cacheKey{root: root}
 		entry := lazilyPersistentStoreColumns.cache.ensure(key)
@@ -149,7 +165,7 @@ func TestIsDataAvailable(t *testing.T) {
 			require.NoError(t, err)
 		}
 
-		err := lazilyPersistentStoreColumns.IsDataAvailable(ctx, 0 /*current slot*/, signedRoBlock)
+		err = lazilyPersistentStoreColumns.IsDataAvailable(ctx, slot, signedRoBlock)
 		require.NoError(t, err)
 
 		actual, err := dataColumnStorage.Get(root, indices[:])
@@ -224,8 +240,8 @@ func TestFullCommitmentsToCheck(t *testing.T) {
 	}
 }
 
-func roSidecarsFromDataColumnParamsByBlockRoot(t *testing.T, dataColumnParamsByBlockRoot util.DataColumnsParamsByRoot) ([]blocks.ROSidecar, []blocks.RODataColumn) {
-	roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
+func roSidecarsFromDataColumnParamsByBlockRoot(t *testing.T, parameters []util.DataColumnParam) ([]blocks.ROSidecar, []blocks.RODataColumn) {
+	roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, parameters)
 
 	roSidecars := make([]blocks.ROSidecar, 0, len(roDataColumns))
 	for _, roDataColumn := range roDataColumns {

beacon-chain/das/data_column_cache_test.go

@@ -28,8 +28,7 @@ func TestEnsureDeleteSetDiskSummary(t *testing.T) {
 
 func TestStash(t *testing.T) {
 	t.Run("Index too high", func(t *testing.T) {
-		dataColumnParamsByBlockRoot := util.DataColumnsParamsByRoot{{1}: {{ColumnIndex: 10_000}}}
-		roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
+		roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, []util.DataColumnParam{{Index: 10_000}})
 
 		var entry dataColumnCacheEntry
 		err := entry.stash(&roDataColumns[0])
@@ -37,8 +36,7 @@ func TestStash(t *testing.T) {
 	})
 
 	t.Run("Nominal and already existing", func(t *testing.T) {
-		dataColumnParamsByBlockRoot := util.DataColumnsParamsByRoot{{1}: {{ColumnIndex: 1}}}
-		roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
+		roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, []util.DataColumnParam{{Index: 1}})
 
 		var entry dataColumnCacheEntry
 		err := entry.stash(&roDataColumns[0])
@@ -76,36 +74,30 @@ func TestFilterDataColumns(t *testing.T) {
 	})
 
 	t.Run("Commitments not equal", func(t *testing.T) {
-		root := [fieldparams.RootLength]byte{}
 		commitmentsArray := safeCommitmentsArray{nil, [][]byte{[]byte{1}}}
 
-		dataColumnParamsByBlockRoot := util.DataColumnsParamsByRoot{root: {{ColumnIndex: 1}}}
-		roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
+		roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, []util.DataColumnParam{{Index: 1}})
 
 		var scs [fieldparams.NumberOfColumns]*blocks.RODataColumn
 		scs[1] = &roDataColumns[0]
 
 		dataColumnCacheEntry := dataColumnCacheEntry{scs: scs}
 
-		_, err := dataColumnCacheEntry.filter(root, &commitmentsArray)
+		_, err := dataColumnCacheEntry.filter(roDataColumns[0].BlockRoot(), &commitmentsArray)
 		require.NotNil(t, err)
 	})
 
 	t.Run("Nominal", func(t *testing.T) {
-		root := [fieldparams.RootLength]byte{}
 		commitmentsArray := safeCommitmentsArray{nil, [][]byte{[]byte{1}}, nil, [][]byte{[]byte{3}}}
-
 		diskSummary := filesystem.NewDataColumnStorageSummary(42, [fieldparams.NumberOfColumns]bool{false, true})
-
-		dataColumnParamsByBlockRoot := util.DataColumnsParamsByRoot{root: {{ColumnIndex: 3, KzgCommitments: [][]byte{[]byte{3}}}}}
-		expected, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
+		expected, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, []util.DataColumnParam{{Index: 3, KzgCommitments: [][]byte{[]byte{3}}}})
 
 		var scs [fieldparams.NumberOfColumns]*blocks.RODataColumn
 		scs[3] = &expected[0]
 
 		dataColumnCacheEntry := dataColumnCacheEntry{scs: scs, diskSummary: diskSummary}
 
-		actual, err := dataColumnCacheEntry.filter(root, &commitmentsArray)
+		actual, err := dataColumnCacheEntry.filter(expected[0].BlockRoot(), &commitmentsArray)
 		require.NoError(t, err)
 
 		require.DeepEqual(t, expected, actual)

beacon-chain/db/filesystem/BUILD.bazel

@@ -59,6 +59,7 @@ go_test(
         "//beacon-chain/verification:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
+        "//consensus-types/blocks:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",

beacon-chain/db/filesystem/data_column_test.go

@@ -8,6 +8,7 @@ import (
 
 	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/primitives"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
@@ -41,32 +42,18 @@ func TestWarmCache(t *testing.T) {
 
 	_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 		t,
-		util.DataColumnsParamsByRoot{
-			{0}: {
-				{Slot: 33, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 1
-				{Slot: 33, ColumnIndex: 4, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 1
-			},
-			{1}: {
-				{Slot: 128_002, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 4000
-				{Slot: 128_002, ColumnIndex: 4, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 4000
-			},
-			{2}: {
-				{Slot: 128_003, ColumnIndex: 1, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 4000
-				{Slot: 128_003, ColumnIndex: 3, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 4000
-			},
-			{3}: {
-				{Slot: 128_034, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 4001
-				{Slot: 128_034, ColumnIndex: 4, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 4001
-			},
-			{4}: {
-				{Slot: 131_138, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4098
-			},
-			{5}: {
-				{Slot: 131_138, ColumnIndex: 1, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4098
-			},
-			{6}: {
-				{Slot: 131_168, ColumnIndex: 0, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4099
-			},
+		[]util.DataColumnParam{
+			{Slot: 33, Index: 2, Column: [][]byte{{1}, {2}, {3}}},      // Period 0 - Epoch 1
+			{Slot: 33, Index: 4, Column: [][]byte{{2}, {3}, {4}}},      // Period 0 - Epoch 1
+			{Slot: 128_002, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 0 - Epoch 4000
+			{Slot: 128_002, Index: 4, Column: [][]byte{{2}, {3}, {4}}}, // Period 0 - Epoch 4000
+			{Slot: 128_003, Index: 1, Column: [][]byte{{1}, {2}, {3}}}, // Period 0 - Epoch 4000
+			{Slot: 128_003, Index: 3, Column: [][]byte{{2}, {3}, {4}}}, // Period 0 - Epoch 4000
+			{Slot: 128_034, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 0 - Epoch 4001
+			{Slot: 128_034, Index: 4, Column: [][]byte{{2}, {3}, {4}}}, // Period 0 - Epoch 4001
+			{Slot: 131_138, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4098
+			{Slot: 131_138, Index: 1, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4098
+			{Slot: 131_168, Index: 0, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4099
 		},
 	)
 
@@ -77,29 +64,25 @@ func TestWarmCache(t *testing.T) {
 
 	storage.WarmCache()
 	require.Equal(t, primitives.Epoch(4_000), storage.cache.lowestCachedEpoch)
-	require.Equal(t, 6, len(storage.cache.cache))
+	require.Equal(t, 5, len(storage.cache.cache))
 
-	summary, ok := storage.cache.get([fieldparams.RootLength]byte{1})
+	summary, ok := storage.cache.get(verifiedRoDataColumnSidecars[2].BlockRoot())
 	require.Equal(t, true, ok)
 	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_000, mask: [fieldparams.NumberOfColumns]bool{false, false, true, false, true}}, summary)
 
-	summary, ok = storage.cache.get([fieldparams.RootLength]byte{2})
+	summary, ok = storage.cache.get(verifiedRoDataColumnSidecars[4].BlockRoot())
 	require.Equal(t, true, ok)
 	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_000, mask: [fieldparams.NumberOfColumns]bool{false, true, false, true}}, summary)
 
-	summary, ok = storage.cache.get([fieldparams.RootLength]byte{3})
+	summary, ok = storage.cache.get(verifiedRoDataColumnSidecars[6].BlockRoot())
 	require.Equal(t, true, ok)
 	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_001, mask: [fieldparams.NumberOfColumns]bool{false, false, true, false, true}}, summary)
 
-	summary, ok = storage.cache.get([fieldparams.RootLength]byte{4})
+	summary, ok = storage.cache.get(verifiedRoDataColumnSidecars[8].BlockRoot())
 	require.Equal(t, true, ok)
-	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_098, mask: [fieldparams.NumberOfColumns]bool{false, false, true}}, summary)
+	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_098, mask: [fieldparams.NumberOfColumns]bool{false, true, true}}, summary)
 
-	summary, ok = storage.cache.get([fieldparams.RootLength]byte{5})
-	require.Equal(t, true, ok)
-	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_098, mask: [fieldparams.NumberOfColumns]bool{false, true}}, summary)
-
-	summary, ok = storage.cache.get([fieldparams.RootLength]byte{6})
+	summary, ok = storage.cache.get(verifiedRoDataColumnSidecars[10].BlockRoot())
 	require.Equal(t, true, ok)
 	require.DeepEqual(t, DataColumnStorageSummary{epoch: 4_099, mask: [fieldparams.NumberOfColumns]bool{true}}, summary)
 }
@@ -113,9 +96,7 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{}: {{ColumnIndex: 12}, {ColumnIndex: 1_000_000}, {ColumnIndex: 48}},
-			},
+			[]util.DataColumnParam{{Index: 12}, {Index: 1_000_000}, {Index: 48}},
 		)
 
 		_, dataColumnStorage := NewEphemeralDataColumnStorageAndFs(t)
@@ -126,7 +107,7 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 	t.Run("one of the column index is too large", func(t *testing.T) {
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{{}: {{ColumnIndex: 12}, {ColumnIndex: 1_000_000}, {ColumnIndex: 48}}},
+			[]util.DataColumnParam{{Index: 12}, {Index: 1_000_000}, {Index: 48}},
 		)
 
 		_, dataColumnStorage := NewEphemeralDataColumnStorageAndFs(t)
@@ -137,23 +118,34 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 	t.Run("different slots", func(t *testing.T) {
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{}: {
-					{Slot: 1, ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-					{Slot: 2, ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-				},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+				{Slot: 2, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
 			},
 		)
 
+		// Create a sidecar with a different slot but the same root.
+		alteredVerifiedRoDataColumnSidecars := make([]blocks.VerifiedRODataColumn, 0, 2)
+		alteredVerifiedRoDataColumnSidecars = append(alteredVerifiedRoDataColumnSidecars, verifiedRoDataColumnSidecars[0])
+
+		altered, err := blocks.NewRODataColumnWithRoot(
+			verifiedRoDataColumnSidecars[1].RODataColumn.DataColumnSidecar,
+			verifiedRoDataColumnSidecars[0].BlockRoot(),
+		)
+		require.NoError(t, err)
+
+		verifiedAltered := blocks.NewVerifiedRODataColumn(altered)
+		alteredVerifiedRoDataColumnSidecars = append(alteredVerifiedRoDataColumnSidecars, verifiedAltered)
+
 		_, dataColumnStorage := NewEphemeralDataColumnStorageAndFs(t)
-		err := dataColumnStorage.Save(verifiedRoDataColumnSidecars)
+		err = dataColumnStorage.Save(alteredVerifiedRoDataColumnSidecars)
 		require.ErrorIs(t, err, errDataColumnSidecarsFromDifferentSlots)
 	})
 
 	t.Run("new file - no data columns to save", func(t *testing.T) {
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{{}: {}},
+			[]util.DataColumnParam{},
 		)
 
 		_, dataColumnStorage := NewEphemeralDataColumnStorageAndFs(t)
@@ -164,11 +156,9 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 	t.Run("new file - different data column size", func(t *testing.T) {
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{}: {
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-					{ColumnIndex: 11, DataColumn: []byte{1, 2, 3, 4}},
-				},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+				{Slot: 1, Index: 13, Column: [][]byte{{1}, {2}, {3}, {4}}},
 			},
 		)
 
@@ -180,7 +170,9 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 	t.Run("existing file - wrong incoming SSZ encoded size", func(t *testing.T) {
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{{1}: {{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}}}},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+			},
 		)
 
 		// Save data columns into a file.
@@ -192,7 +184,9 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 		// column index and an different SSZ encoded size.
 		_, verifiedRoDataColumnSidecars = util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{{1}: {{ColumnIndex: 13, DataColumn: []byte{1, 2, 3, 4}}}},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 13, Column: [][]byte{{1}, {2}, {3}, {4}}},
+			},
 		)
 
 		// Try to rewrite the file.
@@ -203,17 +197,13 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 	t.Run("nominal", func(t *testing.T) {
 		_, inputVerifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{1}: {
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-					{ColumnIndex: 11, DataColumn: []byte{3, 4, 5}},
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}}, // OK if duplicate
-					{ColumnIndex: 13, DataColumn: []byte{6, 7, 8}},
-				},
-				{2}: {
-					{ColumnIndex: 12, DataColumn: []byte{3, 4, 5}},
-					{ColumnIndex: 13, DataColumn: []byte{6, 7, 8}},
-				},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+				{Slot: 1, Index: 11, Column: [][]byte{{3}, {4}, {5}}},
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}}, // OK if duplicate
+				{Slot: 1, Index: 13, Column: [][]byte{{6}, {7}, {8}}},
+				{Slot: 2, Index: 12, Column: [][]byte{{3}, {4}, {5}}},
+				{Slot: 2, Index: 13, Column: [][]byte{{6}, {7}, {8}}},
 			},
 		)
 
@@ -223,16 +213,12 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 
 		_, inputVerifiedRoDataColumnSidecars = util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{1}: {
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}}, // OK if duplicate
-					{ColumnIndex: 15, DataColumn: []byte{2, 3, 4}},
-					{ColumnIndex: 1, DataColumn: []byte{2, 3, 4}},
-				},
-				{3}: {
-					{ColumnIndex: 6, DataColumn: []byte{3, 4, 5}},
-					{ColumnIndex: 2, DataColumn: []byte{6, 7, 8}},
-				},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}}, // OK if duplicate
+				{Slot: 1, Index: 15, Column: [][]byte{{2}, {3}, {4}}},
+				{Slot: 1, Index: 1, Column: [][]byte{{2}, {3}, {4}}},
+				{Slot: 3, Index: 6, Column: [][]byte{{3}, {4}, {5}}},
+				{Slot: 3, Index: 2, Column: [][]byte{{6}, {7}, {8}}},
 			},
 		)
 
@@ -241,51 +227,47 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 
 		type fixture struct {
 			fileName         string
-			blockRoot        [fieldparams.RootLength]byte
 			expectedIndices  [mandatoryNumberOfColumns]byte
-			dataColumnParams []util.DataColumnParams
+			dataColumnParams []util.DataColumnParam
 		}
 
 		fixtures := []fixture{
 			{
-				fileName:  "0/0/0x0100000000000000000000000000000000000000000000000000000000000000.sszs",
-				blockRoot: [fieldparams.RootLength]byte{1},
+				fileName: "0/0/0x8bb2f09de48c102635622dc27e6de03ae2b22639df7c33edbc8222b2ec423746.sszs",
 				expectedIndices: [mandatoryNumberOfColumns]byte{
 					0, nonZeroOffset + 4, 0, 0, 0, 0, 0, 0,
 					0, 0, 0, nonZeroOffset + 1, nonZeroOffset, nonZeroOffset + 2, 0, nonZeroOffset + 3,
 					// The rest is filled with zeroes.
 				},
-				dataColumnParams: []util.DataColumnParams{
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-					{ColumnIndex: 11, DataColumn: []byte{3, 4, 5}},
-					{ColumnIndex: 13, DataColumn: []byte{6, 7, 8}},
-					{ColumnIndex: 15, DataColumn: []byte{2, 3, 4}},
-					{ColumnIndex: 1, DataColumn: []byte{2, 3, 4}},
+				dataColumnParams: []util.DataColumnParam{
+					{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+					{Slot: 1, Index: 11, Column: [][]byte{{3}, {4}, {5}}},
+					{Slot: 1, Index: 13, Column: [][]byte{{6}, {7}, {8}}},
+					{Slot: 1, Index: 15, Column: [][]byte{{2}, {3}, {4}}},
+					{Slot: 1, Index: 1, Column: [][]byte{{2}, {3}, {4}}},
 				},
 			},
 			{
-				fileName:  "0/0/0x0200000000000000000000000000000000000000000000000000000000000000.sszs",
-				blockRoot: [fieldparams.RootLength]byte{2},
+				fileName: "0/0/0x221f88cae2219050d4e9d8c2d0d83cb4c8ce4c84ab1bb3e0b89f3dec36077c4f.sszs",
 				expectedIndices: [mandatoryNumberOfColumns]byte{
 					0, 0, 0, 0, 0, 0, 0, 0,
 					0, 0, 0, 0, nonZeroOffset, nonZeroOffset + 1, 0, 0,
 					// The rest is filled with zeroes.
 				},
-				dataColumnParams: []util.DataColumnParams{
-					{ColumnIndex: 12, DataColumn: []byte{3, 4, 5}},
-					{ColumnIndex: 13, DataColumn: []byte{6, 7, 8}},
+				dataColumnParams: []util.DataColumnParam{
+					{Slot: 2, Index: 12, Column: [][]byte{{3}, {4}, {5}}},
+					{Slot: 2, Index: 13, Column: [][]byte{{6}, {7}, {8}}},
 				},
 			},
 			{
-				fileName:  "0/0/0x0300000000000000000000000000000000000000000000000000000000000000.sszs",
-				blockRoot: [fieldparams.RootLength]byte{3},
+				fileName: "0/0/0x7b163bd57e1c4c8b5048c5389698098f4c957d62d7ce86f4ffa9bdc75c16a18b.sszs",
 				expectedIndices: [mandatoryNumberOfColumns]byte{
 					0, 0, nonZeroOffset + 1, 0, 0, 0, nonZeroOffset, 0,
 					// The rest is filled with zeroes.
 				},
-				dataColumnParams: []util.DataColumnParams{
-					{ColumnIndex: 6, DataColumn: []byte{3, 4, 5}},
-					{ColumnIndex: 2, DataColumn: []byte{6, 7, 8}},
+				dataColumnParams: []util.DataColumnParam{
+					{Slot: 3, Index: 6, Column: [][]byte{{3}, {4}, {5}}},
+					{Slot: 3, Index: 2, Column: [][]byte{{6}, {7}, {8}}},
 				},
 			},
 		}
@@ -294,7 +276,7 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 			// Build expected data column sidecars.
 			_, expectedDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 				t,
-				util.DataColumnsParamsByRoot{fixture.blockRoot: fixture.dataColumnParams},
+				fixture.dataColumnParams,
 			)
 
 			// Build expected bytes.
@@ -321,6 +303,8 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 			expectedBytes = append(expectedBytes, fixture.expectedIndices[:]...)
 			expectedBytes = append(expectedBytes, sszEncodedDataColumnSidecars...)
 
+			blockRoot := expectedDataColumnSidecars[0].BlockRoot()
+
 			// Check the actual content of the file.
 			actualBytes, err := afero.ReadFile(dataColumnStorage.fs, fixture.fileName)
 			require.NoError(t, err)
@@ -329,18 +313,18 @@ func TestSaveDataColumnsSidecars(t *testing.T) {
 			// Check the summary.
 			indices := map[uint64]bool{}
 			for _, dataColumnParam := range fixture.dataColumnParams {
-				indices[dataColumnParam.ColumnIndex] = true
+				indices[dataColumnParam.Index] = true
 			}
 
-			summary := dataColumnStorage.Summary(fixture.blockRoot)
+			summary := dataColumnStorage.Summary(blockRoot)
 			for index := range uint64(mandatoryNumberOfColumns) {
 				require.Equal(t, indices[index], summary.HasIndex(index))
 			}
 
-			err = dataColumnStorage.Remove(fixture.blockRoot)
+			err = dataColumnStorage.Remove(blockRoot)
 			require.NoError(t, err)
 
-			summary = dataColumnStorage.Summary(fixture.blockRoot)
+			summary = dataColumnStorage.Summary(blockRoot)
 			for index := range uint64(mandatoryNumberOfColumns) {
 				require.Equal(t, false, summary.HasIndex(index))
 			}
@@ -363,11 +347,9 @@ func TestGetDataColumnSidecars(t *testing.T) {
 	t.Run("indices not found", func(t *testing.T) {
 		_, savedVerifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{1}: {
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-					{ColumnIndex: 14, DataColumn: []byte{2, 3, 4}},
-				},
+			[]util.DataColumnParam{
+				{Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+				{Index: 14, Column: [][]byte{{2}, {3}, {4}}},
 			},
 		)
 
@@ -375,7 +357,7 @@ func TestGetDataColumnSidecars(t *testing.T) {
 		err := dataColumnStorage.Save(savedVerifiedRoDataColumnSidecars)
 		require.NoError(t, err)
 
-		verifiedRODataColumnSidecars, err := dataColumnStorage.Get([fieldparams.RootLength]byte{1}, []uint64{3, 1, 2})
+		verifiedRODataColumnSidecars, err := dataColumnStorage.Get(savedVerifiedRoDataColumnSidecars[0].BlockRoot(), []uint64{3, 1, 2})
 		require.NoError(t, err)
 		require.Equal(t, 0, len(verifiedRODataColumnSidecars))
 	})
@@ -383,11 +365,9 @@ func TestGetDataColumnSidecars(t *testing.T) {
 	t.Run("nominal", func(t *testing.T) {
 		_, expectedVerifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{1}: {
-					{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}},
-					{ColumnIndex: 14, DataColumn: []byte{2, 3, 4}},
-				},
+			[]util.DataColumnParam{
+				{Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+				{Index: 14, Column: [][]byte{{2}, {3}, {4}}},
 			},
 		)
 
@@ -395,11 +375,13 @@ func TestGetDataColumnSidecars(t *testing.T) {
 		err := dataColumnStorage.Save(expectedVerifiedRoDataColumnSidecars)
 		require.NoError(t, err)
 
-		verifiedRODataColumnSidecars, err := dataColumnStorage.Get([fieldparams.RootLength]byte{1}, nil)
+		root := expectedVerifiedRoDataColumnSidecars[0].BlockRoot()
+
+		verifiedRODataColumnSidecars, err := dataColumnStorage.Get(root, nil)
 		require.NoError(t, err)
 		require.DeepSSZEqual(t, expectedVerifiedRoDataColumnSidecars, verifiedRODataColumnSidecars)
 
-		verifiedRODataColumnSidecars, err = dataColumnStorage.Get([fieldparams.RootLength]byte{1}, []uint64{12, 13, 14})
+		verifiedRODataColumnSidecars, err = dataColumnStorage.Get(root, []uint64{12, 13, 14})
 		require.NoError(t, err)
 		require.DeepSSZEqual(t, expectedVerifiedRoDataColumnSidecars, verifiedRODataColumnSidecars)
 	})
@@ -415,15 +397,11 @@ func TestRemove(t *testing.T) {
 	t.Run("nominal", func(t *testing.T) {
 		_, inputVerifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{1}: {
-					{Slot: 32, ColumnIndex: 10, DataColumn: []byte{1, 2, 3}},
-					{Slot: 32, ColumnIndex: 11, DataColumn: []byte{2, 3, 4}},
-				},
-				{2}: {
-					{Slot: 33, ColumnIndex: 10, DataColumn: []byte{1, 2, 3}},
-					{Slot: 33, ColumnIndex: 11, DataColumn: []byte{2, 3, 4}},
-				},
+			[]util.DataColumnParam{
+				{Slot: 32, Index: 10, Column: [][]byte{{1}, {2}, {3}}},
+				{Slot: 32, Index: 11, Column: [][]byte{{2}, {3}, {4}}},
+				{Slot: 33, Index: 10, Column: [][]byte{{1}, {2}, {3}}},
+				{Slot: 33, Index: 11, Column: [][]byte{{2}, {3}, {4}}},
 			},
 		)
 
@@ -431,22 +409,22 @@ func TestRemove(t *testing.T) {
 		err := dataColumnStorage.Save(inputVerifiedRoDataColumnSidecars)
 		require.NoError(t, err)
 
-		err = dataColumnStorage.Remove([fieldparams.RootLength]byte{1})
+		err = dataColumnStorage.Remove(inputVerifiedRoDataColumnSidecars[0].BlockRoot())
 		require.NoError(t, err)
 
-		summary := dataColumnStorage.Summary([fieldparams.RootLength]byte{1})
+		summary := dataColumnStorage.Summary(inputVerifiedRoDataColumnSidecars[0].BlockRoot())
 		require.Equal(t, primitives.Epoch(0), summary.epoch)
 		require.Equal(t, uint64(0), summary.Count())
 
-		summary = dataColumnStorage.Summary([fieldparams.RootLength]byte{2})
+		summary = dataColumnStorage.Summary(inputVerifiedRoDataColumnSidecars[3].BlockRoot())
 		require.Equal(t, primitives.Epoch(1), summary.epoch)
 		require.Equal(t, uint64(2), summary.Count())
 
-		actual, err := dataColumnStorage.Get([fieldparams.RootLength]byte{1}, nil)
+		actual, err := dataColumnStorage.Get(inputVerifiedRoDataColumnSidecars[0].BlockRoot(), nil)
 		require.NoError(t, err)
 		require.Equal(t, 0, len(actual))
 
-		actual, err = dataColumnStorage.Get([fieldparams.RootLength]byte{2}, nil)
+		actual, err = dataColumnStorage.Get(inputVerifiedRoDataColumnSidecars[3].BlockRoot(), nil)
 		require.NoError(t, err)
 		require.Equal(t, 2, len(actual))
 	})
@@ -455,9 +433,9 @@ func TestRemove(t *testing.T) {
 func TestClear(t *testing.T) {
 	_, inputVerifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 		t,
-		util.DataColumnsParamsByRoot{
-			{1}: {{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}}},
-			{2}: {{ColumnIndex: 13, DataColumn: []byte{6, 7, 8}}},
+		[]util.DataColumnParam{
+			{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
+			{Slot: 2, Index: 13, Column: [][]byte{{6}, {7}, {8}}},
 		},
 	)
 
@@ -466,8 +444,8 @@ func TestClear(t *testing.T) {
 	require.NoError(t, err)
 
 	filePaths := []string{
-		"0/0/0x0100000000000000000000000000000000000000000000000000000000000000.sszs",
-		"0/0/0x0200000000000000000000000000000000000000000000000000000000000000.sszs",
+		"0/0/0x8bb2f09de48c102635622dc27e6de03ae2b22639df7c33edbc8222b2ec423746.sszs",
+		"0/0/0x221f88cae2219050d4e9d8c2d0d83cb4c8ce4c84ab1bb3e0b89f3dec36077c4f.sszs",
 	}
 
 	for _, filePath := range filePaths {
@@ -493,8 +471,8 @@ func TestMetadata(t *testing.T) {
 	t.Run("wrong version", func(t *testing.T) {
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{1}: {{ColumnIndex: 12, DataColumn: []byte{1, 2, 3}}},
+			[]util.DataColumnParam{
+				{Slot: 1, Index: 12, Column: [][]byte{{1}, {2}, {3}}},
 			},
 		)
 
@@ -504,7 +482,7 @@ func TestMetadata(t *testing.T) {
 		require.NoError(t, err)
 
 		// Alter the version.
-		const filePath = "0/0/0x0100000000000000000000000000000000000000000000000000000000000000.sszs"
+		const filePath = "0/0/0x8bb2f09de48c102635622dc27e6de03ae2b22639df7c33edbc8222b2ec423746.sszs"
 		file, err := dataColumnStorage.fs.OpenFile(filePath, os.O_WRONLY, os.FileMode(0600))
 		require.NoError(t, err)
 
@@ -644,31 +622,19 @@ func TestPrune(t *testing.T) {
 		}
 		_, verifiedRoDataColumnSidecars := util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{0}: {
-					{Slot: 33, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 1
-					{Slot: 33, ColumnIndex: 4, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 1
-				},
-				{1}: {
-					{Slot: 128_002, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 4000
-					{Slot: 128_002, ColumnIndex: 4, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 4000
-				},
-				{2}: {
-					{Slot: 128_003, ColumnIndex: 1, DataColumn: []byte{1, 2, 3}}, // Period 0 - Epoch 4000
-					{Slot: 128_003, ColumnIndex: 3, DataColumn: []byte{2, 3, 4}}, // Period 0 - Epoch 4000
-				},
-				{3}: {
-					{Slot: 131_138, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4098
-					{Slot: 131_138, ColumnIndex: 3, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4098
-				},
-				{4}: {
-					{Slot: 131_169, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4099
-					{Slot: 131_169, ColumnIndex: 3, DataColumn: []byte{1, 2, 3}}, // Period 1 - Epoch 4099
-				},
-				{5}: {
-					{Slot: 262_144, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}, // Period 2 - Epoch 8192
-					{Slot: 262_144, ColumnIndex: 3, DataColumn: []byte{1, 2, 3}}, // Period 2 - Epoch 8292
-				},
+			[]util.DataColumnParam{
+				{Slot: 33, Index: 2, Column: [][]byte{{1}, {2}, {3}}},      // Period 0 - Epoch 1
+				{Slot: 33, Index: 4, Column: [][]byte{{2}, {3}, {4}}},      // Period 0 - Epoch 1
+				{Slot: 128_002, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 0 - Epoch 4000
+				{Slot: 128_002, Index: 4, Column: [][]byte{{2}, {3}, {4}}}, // Period 0 - Epoch 4000
+				{Slot: 128_003, Index: 1, Column: [][]byte{{1}, {2}, {3}}}, // Period 0 - Epoch 4000
+				{Slot: 128_003, Index: 3, Column: [][]byte{{2}, {3}, {4}}}, // Period 0 - Epoch 4000
+				{Slot: 131_138, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4098
+				{Slot: 131_138, Index: 3, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4098
+				{Slot: 131_169, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4099
+				{Slot: 131_169, Index: 3, Column: [][]byte{{1}, {2}, {3}}}, // Period 1 - Epoch 4099
+				{Slot: 262_144, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 2 - Epoch 8192
+				{Slot: 262_144, Index: 3, Column: [][]byte{{1}, {2}, {3}}}, // Period 2 - Epoch 8292
 			},
 		)
 
@@ -697,31 +663,31 @@ func TestPrune(t *testing.T) {
 
 		dirs, err = listDir(dataColumnStorage.fs, "0/1")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0000000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0x775283f428813c949b7e8af07f01fef9790137f021b3597ad2d0d81e8be8f0f0.sszs"}, dirs))
 
 		dirs, err = listDir(dataColumnStorage.fs, "0/4000")
 		require.NoError(t, err)
 		require.Equal(t, true, compareSlices([]string{
-			"0x0200000000000000000000000000000000000000000000000000000000000000.sszs",
-			"0x0100000000000000000000000000000000000000000000000000000000000000.sszs",
+			"0x9977031132157ebb9c81bce952003ce07a4f54e921ca63b7693d1562483fdf9f.sszs",
+			"0xb2b14d9d858fa99b70f0405e4e39f38e51e36dd9a70343c109e24eeb5f77e369.sszs",
 		}, dirs))
 
 		dirs, err = listDir(dataColumnStorage.fs, "1/4098")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0300000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0x5106745cdd6b1aa3602ef4d000ef373af672019264c167fa4bd641a1094aa5c5.sszs"}, dirs))
 
 		dirs, err = listDir(dataColumnStorage.fs, "1/4099")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0400000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0x4e5f2bd5bb84bf0422af8edd1cc5a52cc6cea85baf3d66d172fe41831ac1239c.sszs"}, dirs))
 
 		dirs, err = listDir(dataColumnStorage.fs, "2/8192")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0500000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0xa8adba7446eb56a01a9dd6d55e9c3990b10c91d43afb77847b4a21ac4ee62527.sszs"}, dirs))
 
 		_, verifiedRoDataColumnSidecars = util.CreateTestVerifiedRoDataColumnSidecars(
 			t,
-			util.DataColumnsParamsByRoot{
-				{6}: {{Slot: 451_141, ColumnIndex: 2, DataColumn: []byte{1, 2, 3}}}, // Period 3 - Epoch 14_098
+			[]util.DataColumnParam{
+				{Slot: 451_141, Index: 2, Column: [][]byte{{1}, {2}, {3}}}, // Period 3 - Epoch 14_098
 			},
 		)
 
@@ -749,14 +715,14 @@ func TestPrune(t *testing.T) {
 
 		dirs, err = listDir(dataColumnStorage.fs, "1/4099")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0400000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0x4e5f2bd5bb84bf0422af8edd1cc5a52cc6cea85baf3d66d172fe41831ac1239c.sszs"}, dirs))
 
 		dirs, err = listDir(dataColumnStorage.fs, "2/8192")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0500000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0xa8adba7446eb56a01a9dd6d55e9c3990b10c91d43afb77847b4a21ac4ee62527.sszs"}, dirs))
 
 		dirs, err = listDir(dataColumnStorage.fs, "3/14098")
 		require.NoError(t, err)
-		require.Equal(t, true, compareSlices([]string{"0x0600000000000000000000000000000000000000000000000000000000000000.sszs"}, dirs))
+		require.Equal(t, true, compareSlices([]string{"0x0de28a18cae63cbc6f0b20dc1afb0b1df38da40824a5f09f92d485ade04de97f.sszs"}, dirs))
 	})
 }

beacon-chain/db/kv/state.go

@@ -518,7 +518,7 @@ func (s *Store) unmarshalState(_ context.Context, enc []byte, validatorEntries [
 
 	switch {
 	case hasFuluKey(enc):
-		protoState := &ethpb.BeaconStateElectra{}
+		protoState := &ethpb.BeaconStateFulu{}
 		if err := protoState.UnmarshalSSZ(enc[len(fuluKey):]); err != nil {
 			return nil, errors.Wrap(err, "failed to unmarshal encoding for Fulu")
 		}
@@ -690,7 +690,7 @@ func marshalState(ctx context.Context, st state.ReadOnlyBeaconState) ([]byte, er
 		}
 		return snappy.Encode(nil, append(ElectraKey, rawObj...)), nil
 	case version.Fulu:
-		rState, ok := st.ToProtoUnsafe().(*ethpb.BeaconStateElectra)
+		rState, ok := st.ToProtoUnsafe().(*ethpb.BeaconStateFulu)
 		if !ok {
 			return nil, errors.New("non valid inner state")
 		}

beacon-chain/execution/BUILD.bazel

@@ -31,6 +31,7 @@ go_library(
         "//beacon-chain/core/feed:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/execution/types:go_default_library",
@@ -97,6 +98,7 @@ go_test(
     embed = [":go_default_library"],
     deps = [
         "//async/event:go_default_library",
+        "//beacon-chain/blockchain/kzg:go_default_library",
         "//beacon-chain/cache/depositsnapshot:go_default_library",
         "//beacon-chain/core/feed:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",

beacon-chain/execution/engine_client.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/execution/types"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/verification"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
@@ -44,11 +45,16 @@ var (
 		GetPayloadMethodV3,
 		GetPayloadBodiesByHashV1,
 		GetPayloadBodiesByRangeV1,
+		GetBlobsV1,
 	}
 	electraEngineEndpoints = []string{
 		NewPayloadMethodV4,
 		GetPayloadMethodV4,
 	}
+	fuluEngineEndpoints = []string{
+		GetPayloadMethodV5,
+		GetBlobsV2,
+	}
 )
 
 const (
@@ -73,6 +79,8 @@ const (
 	GetPayloadMethodV3 = "engine_getPayloadV3"
 	// GetPayloadMethodV4 is the get payload method added for electra
 	GetPayloadMethodV4 = "engine_getPayloadV4"
+	// GetPayloadMethodV5 is the get payload method added for fulu
+	GetPayloadMethodV5 = "engine_getPayloadV5"
 	// BlockByHashMethod request string for JSON-RPC.
 	BlockByHashMethod = "eth_getBlockByHash"
 	// BlockByNumberMethod request string for JSON-RPC.
@@ -85,11 +93,21 @@ const (
 	ExchangeCapabilities = "engine_exchangeCapabilities"
 	// GetBlobsV1 request string for JSON-RPC.
 	GetBlobsV1 = "engine_getBlobsV1"
+	// GetBlobsV2 request string for JSON-RPC.
+	GetBlobsV2 = "engine_getBlobsV2"
 	// Defines the seconds before timing out engine endpoints with non-block execution semantics.
-	defaultEngineTimeout = time.Second
+	// TODO: Remove temporarily needed hack since geth takes an input blobs txs with blobs proofs, and
+	// does the heavy lifting of building cells proofs, while normally this is done by the tx sender.
+	// This is a cool hack because it lets the CL to act as if the tx sender actually computed the cells proofs.
+	// The only counter part is the `engine_getPayloadv<x>` takes a lot of time.
+	// defaultEngineTimeout = time.Second
+	defaultEngineTimeout = 2 * time.Second
 )
 
-var errInvalidPayloadBodyResponse = errors.New("engine api payload body response is invalid")
+var (
+	errInvalidPayloadBodyResponse  = errors.New("engine api payload body response is invalid")
+	errMissingBlobsAndProofsFromEL = errors.New("engine api payload body response is missing blobs and proofs")
+)
 
 // ForkchoiceUpdatedResponse is the response kind received by the
 // engine_forkchoiceUpdatedV1 endpoint.
@@ -108,6 +126,7 @@ type Reconstructor interface {
 		ctx context.Context, blindedBlocks []interfaces.ReadOnlySignedBeaconBlock,
 	) ([]interfaces.SignedBeaconBlock, error)
 	ReconstructBlobSidecars(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte, hi func(uint64) bool) ([]blocks.VerifiedROBlob, error)
+	ReconstructDataColumnSidecars(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte) ([]blocks.VerifiedRODataColumn, error)
 }
 
 // EngineCaller defines a client that can interact with an Ethereum
@@ -257,6 +276,9 @@ func (s *Service) ForkchoiceUpdated(
 
 func getPayloadMethodAndMessage(slot primitives.Slot) (string, proto.Message) {
 	pe := slots.ToEpoch(slot)
+	if pe >= params.BeaconConfig().FuluForkEpoch {
+		return GetPayloadMethodV5, &pb.ExecutionBundleFulu{}
+	}
 	if pe >= params.BeaconConfig().ElectraForkEpoch {
 		return GetPayloadMethodV4, &pb.ExecutionBundleElectra{}
 	}
@@ -289,7 +311,7 @@ func (s *Service) GetPayload(ctx context.Context, payloadId [8]byte, slot primit
 	}
 	res, err := blocks.NewGetPayloadResponse(result)
 	if err != nil {
-		return nil, err
+		return nil, errors.Wrap(err, "new get payload response")
 	}
 	return res, nil
 }
@@ -298,33 +320,36 @@ func (s *Service) ExchangeCapabilities(ctx context.Context) ([]string, error) {
 	ctx, span := trace.StartSpan(ctx, "powchain.engine-api-client.ExchangeCapabilities")
 	defer span.End()
 
-	// Only check for electra related engine methods if it has been activated.
 	if params.ElectraEnabled() {
 		supportedEngineEndpoints = append(supportedEngineEndpoints, electraEngineEndpoints...)
 	}
-	var result []string
-	err := s.rpcClient.CallContext(ctx, &result, ExchangeCapabilities, supportedEngineEndpoints)
-	if err != nil {
+
+	if params.FuluEnabled() {
+		supportedEngineEndpoints = append(supportedEngineEndpoints, fuluEngineEndpoints...)
+	}
+
+	elSupportedEndpointsSlice := make([]string, len(supportedEngineEndpoints))
+	if err := s.rpcClient.CallContext(ctx, &elSupportedEndpointsSlice, ExchangeCapabilities, supportedEngineEndpoints); err != nil {
 		return nil, handleRPCError(err)
 	}
 
-	var unsupported []string
-	for _, s1 := range supportedEngineEndpoints {
-		supported := false
-		for _, s2 := range result {
-			if s1 == s2 {
-				supported = true
-				break
-			}
-		}
-		if !supported {
-			unsupported = append(unsupported, s1)
+	elSupportedEndpoints := make(map[string]bool, len(elSupportedEndpointsSlice))
+	for _, method := range elSupportedEndpointsSlice {
+		elSupportedEndpoints[method] = true
+	}
+
+	unsupported := make([]string, 0, len(supportedEngineEndpoints))
+	for _, method := range supportedEngineEndpoints {
+		if !elSupportedEndpoints[method] {
+			unsupported = append(unsupported, method)
 		}
 	}
+
 	if len(unsupported) != 0 {
-		log.Warnf("Please update client, detected the following unsupported engine methods: %s", unsupported)
+		log.WithField("methods", unsupported).Warning("Connected execution client does not support some requested engine methods")
 	}
-	return result, handleRPCError(err)
+
+	return elSupportedEndpointsSlice, nil
 }
 
 // GetTerminalBlockHash returns the valid terminal block hash based on total difficulty.
@@ -495,9 +520,10 @@ func (s *Service) HeaderByNumber(ctx context.Context, number *big.Int) (*types.H
 func (s *Service) GetBlobs(ctx context.Context, versionedHashes []common.Hash) ([]*pb.BlobAndProof, error) {
 	ctx, span := trace.StartSpan(ctx, "powchain.engine-api-client.GetBlobs")
 	defer span.End()
+
 	// If the execution engine does not support `GetBlobsV1`, return early to prevent encountering an error later.
 	if !s.capabilityCache.has(GetBlobsV1) {
-		return nil, nil
+		return nil, errors.New(fmt.Sprintf("%s is not supported", GetBlobsV1))
 	}
 
 	result := make([]*pb.BlobAndProof, len(versionedHashes))
@@ -505,6 +531,19 @@ func (s *Service) GetBlobs(ctx context.Context, versionedHashes []common.Hash) (
 	return result, handleRPCError(err)
 }
 
+func (s *Service) GetBlobsV2(ctx context.Context, versionedHashes []common.Hash) ([]*pb.BlobAndProofV2, error) {
+	ctx, span := trace.StartSpan(ctx, "powchain.engine-api-client.GetBlobsV2")
+	defer span.End()
+
+	if !s.capabilityCache.has(GetBlobsV2) {
+		return nil, errors.New(fmt.Sprintf("%s is not supported", GetBlobsV2))
+	}
+
+	result := make([]*pb.BlobAndProofV2, len(versionedHashes))
+	err := s.rpcClient.CallContext(ctx, &result, GetBlobsV2, versionedHashes)
+	return result, handleRPCError(err)
+}
+
 // ReconstructFullBlock takes in a blinded beacon block and reconstructs
 // a beacon block with a full execution payload via the engine API.
 func (s *Service) ReconstructFullBlock(
@@ -615,6 +654,73 @@ func (s *Service) ReconstructBlobSidecars(ctx context.Context, block interfaces.
 	return verifiedBlobs, nil
 }
 
+// ReconstructDataColumnSidecars reconstructs the verified data column sidecars for a given beacon block.
+// It retrieves the KZG commitments from the block body, fetches the associated blobs and cell proofs from the EL,
+// and constructs the corresponding verified read-only data column sidecars.
+func (s *Service) ReconstructDataColumnSidecars(ctx context.Context, signedROBlock interfaces.ReadOnlySignedBeaconBlock, blockRoot [fieldparams.RootLength]byte) ([]blocks.VerifiedRODataColumn, error) {
+	block := signedROBlock.Block()
+
+	log := log.WithFields(logrus.Fields{
+		"root": fmt.Sprintf("%#x", blockRoot),
+		"slot": block.Slot(),
+	})
+
+	kzgCommitments, err := block.Body().BlobKzgCommitments()
+	if err != nil {
+		return nil, wrapWithBlockRoot(err, blockRoot, "blob KZG commitments")
+	}
+
+	// Collect KZG hashes for all blobs
+	var kzgHashes []common.Hash
+	for _, commitment := range kzgCommitments {
+		kzgHashes = append(kzgHashes, primitives.ConvertKzgCommitmentToVersionedHash(commitment))
+	}
+
+	// Fetch all blobsAndCellsProofs from EL
+	blobAndProofV2s, err := s.GetBlobsV2(ctx, kzgHashes)
+	if err != nil {
+		return nil, wrapWithBlockRoot(err, blockRoot, "get blobs V2")
+	}
+
+	// Return early if nothing is returned from the EL.
+	if len(blobAndProofV2s) == 0 {
+		log.Debug("No blobs returned from EL")
+		return nil, nil
+	}
+
+	// Extract the blobs and proofs from the blobAndProofV2s.
+	blobs := make([][]byte, 0, len(blobAndProofV2s))
+	cellProofs := make([][]byte, 0, len(blobAndProofV2s))
+	for _, blobsAndProofs := range blobAndProofV2s {
+		if blobsAndProofs == nil {
+			return nil, wrapWithBlockRoot(errMissingBlobsAndProofsFromEL, blockRoot, "")
+		}
+		blobs = append(blobs, blobsAndProofs.Blob)
+		cellProofs = append(cellProofs, blobsAndProofs.KzgProofs...)
+	}
+
+	dataColumnSidecars, err := peerdas.ConstructDataColumnSidecars(signedROBlock, blobs, cellProofs)
+	if err != nil {
+		return nil, wrapWithBlockRoot(err, blockRoot, "construct data column sidecars")
+	}
+
+	verifiedRODataColumns := make([]blocks.VerifiedRODataColumn, 0, len(dataColumnSidecars))
+	for _, dataColumnSidecar := range dataColumnSidecars {
+		roDataColumn, err := blocks.NewRODataColumnWithRoot(dataColumnSidecar, blockRoot)
+		if err != nil {
+			return nil, wrapWithBlockRoot(err, blockRoot, "new read-only data column with root")
+		}
+
+		// We trust the execution layer we are connected to, so we can upgrade the read only data column sidecar into a verified one.
+		verifiedRODataColumn := blocks.NewVerifiedRODataColumn(roDataColumn)
+		verifiedRODataColumns = append(verifiedRODataColumns, verifiedRODataColumn)
+	}
+
+	log.Debug("Data columns successfully reconstructed from EL")
+
+	return verifiedRODataColumns, nil
+}
+
 func fullPayloadFromPayloadBody(
 	header interfaces.ExecutionData, body *pb.ExecutionPayloadBody, bVersion int,
 ) (interfaces.ExecutionData, error) {
@@ -902,3 +1008,8 @@ func toBlockNumArg(number *big.Int) string {
 	}
 	return hexutil.EncodeBig(number)
 }
+
+// wrapWithBlockRoot returns a new error with the given block root.
+func wrapWithBlockRoot(err error, blockRoot [32]byte, message string) error {
+	return errors.Wrap(err, fmt.Sprintf("%s for block %#x", message, blockRoot))
+}

beacon-chain/execution/engine_client_test.go

@@ -13,6 +13,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filesystem"
 	mocks "github.com/OffchainLabs/prysm/v6/beacon-chain/execution/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/verification"
@@ -167,6 +168,7 @@ func TestClient_HTTP(t *testing.T) {
 	cfg.CapellaForkEpoch = 1
 	cfg.DenebForkEpoch = 2
 	cfg.ElectraForkEpoch = 3
+	cfg.FuluForkEpoch = 4
 	params.OverrideBeaconConfig(cfg)
 
 	t.Run(GetPayloadMethod, func(t *testing.T) {
@@ -317,11 +319,11 @@ func TestClient_HTTP(t *testing.T) {
 		require.DeepEqual(t, uint64(2), g)
 
 		commitments := [][]byte{bytesutil.PadTo([]byte("commitment1"), fieldparams.BLSPubkeyLength), bytesutil.PadTo([]byte("commitment2"), fieldparams.BLSPubkeyLength)}
-		require.DeepEqual(t, commitments, resp.BlobsBundle.KzgCommitments)
+		require.DeepEqual(t, commitments, resp.BlobsBundler.GetKzgCommitments())
 		proofs := [][]byte{bytesutil.PadTo([]byte("proof1"), fieldparams.BLSPubkeyLength), bytesutil.PadTo([]byte("proof2"), fieldparams.BLSPubkeyLength)}
-		require.DeepEqual(t, proofs, resp.BlobsBundle.Proofs)
+		require.DeepEqual(t, proofs, resp.BlobsBundler.GetProofs())
 		blobs := [][]byte{bytesutil.PadTo([]byte("a"), fieldparams.BlobLength), bytesutil.PadTo([]byte("b"), fieldparams.BlobLength)}
-		require.DeepEqual(t, blobs, resp.BlobsBundle.Blobs)
+		require.DeepEqual(t, blobs, resp.BlobsBundler.GetBlobs())
 	})
 	t.Run(GetPayloadMethodV4, func(t *testing.T) {
 		payloadId := [8]byte{1}
@@ -372,11 +374,11 @@ func TestClient_HTTP(t *testing.T) {
 		require.DeepEqual(t, uint64(2), g)
 
 		commitments := [][]byte{bytesutil.PadTo([]byte("commitment1"), fieldparams.BLSPubkeyLength), bytesutil.PadTo([]byte("commitment2"), fieldparams.BLSPubkeyLength)}
-		require.DeepEqual(t, commitments, resp.BlobsBundle.KzgCommitments)
+		require.DeepEqual(t, commitments, resp.BlobsBundler.GetKzgCommitments())
 		proofs := [][]byte{bytesutil.PadTo([]byte("proof1"), fieldparams.BLSPubkeyLength), bytesutil.PadTo([]byte("proof2"), fieldparams.BLSPubkeyLength)}
-		require.DeepEqual(t, proofs, resp.BlobsBundle.Proofs)
+		require.DeepEqual(t, proofs, resp.BlobsBundler.GetProofs())
 		blobs := [][]byte{bytesutil.PadTo([]byte("a"), fieldparams.BlobLength), bytesutil.PadTo([]byte("b"), fieldparams.BlobLength)}
-		require.DeepEqual(t, blobs, resp.BlobsBundle.Blobs)
+		require.DeepEqual(t, blobs, resp.BlobsBundler.GetBlobs())
 		requests := &pb.ExecutionRequests{
 			Deposits: []*pb.DepositRequest{
 				{
@@ -405,7 +407,52 @@ func TestClient_HTTP(t *testing.T) {
 
 		require.DeepEqual(t, requests, resp.ExecutionRequests)
 	})
+	t.Run(GetPayloadMethodV5, func(t *testing.T) {
+		payloadId := [8]byte{1}
+		want, ok := fix["ExecutionBundleFulu"].(*pb.GetPayloadV5ResponseJson)
+		require.Equal(t, true, ok)
+		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("Content-Type", "application/json")
+			defer func() {
+				require.NoError(t, r.Body.Close())
+			}()
+			enc, err := io.ReadAll(r.Body)
+			require.NoError(t, err)
+			jsonRequestString := string(enc)
 
+			reqArg, err := json.Marshal(pb.PayloadIDBytes(payloadId))
+			require.NoError(t, err)
+
+			// We expect the JSON string RPC request contains the right arguments.
+			require.Equal(t, true, strings.Contains(
+				jsonRequestString, string(reqArg),
+			))
+			resp := map[string]interface{}{
+				"jsonrpc": "2.0",
+				"id":      1,
+				"result":  want,
+			}
+			err = json.NewEncoder(w).Encode(resp)
+			require.NoError(t, err)
+		}))
+		defer srv.Close()
+
+		rpcClient, err := rpc.DialHTTP(srv.URL)
+		require.NoError(t, err)
+		defer rpcClient.Close()
+
+		client := &Service{}
+		client.rpcClient = rpcClient
+
+		// We call the RPC method via HTTP and expect a proper result.
+		resp, err := client.GetPayload(ctx, payloadId, 4*params.BeaconConfig().SlotsPerEpoch)
+		require.NoError(t, err)
+		_, ok = resp.BlobsBundler.(*pb.BlobsBundleV2)
+		if !ok {
+			t.Logf("resp.BlobsBundler has unexpected type: %T", resp.BlobsBundler)
+		}
+		require.Equal(t, ok, true)
+	})
 	t.Run(ForkchoiceUpdatedMethod+" VALID status", func(t *testing.T) {
 		forkChoiceState := &pb.ForkchoiceState{
 			HeadBlockHash:      []byte("head"),
@@ -1539,6 +1586,7 @@ func fixtures() map[string]interface{} {
 		"ExecutionPayloadCapellaWithValue":  s.ExecutionPayloadWithValueCapella,
 		"ExecutionPayloadDenebWithValue":    s.ExecutionPayloadWithValueDeneb,
 		"ExecutionBundleElectra":            s.ExecutionBundleElectra,
+		"ExecutionBundleFulu":               s.ExecutionBundleFulu,
 		"ValidPayloadStatus":                s.ValidPayloadStatus,
 		"InvalidBlockHashStatus":            s.InvalidBlockHashStatus,
 		"AcceptedStatus":                    s.AcceptedStatus,
@@ -1774,6 +1822,36 @@ func fixturesStruct() *payloadFixtures {
 			append([]byte{pb.WithdrawalRequestType}, withdrawalRequestBytes...),
 			append([]byte{pb.ConsolidationRequestType}, consolidationRequestBytes...)},
 	}
+	executionBundleFixtureFulu := &pb.GetPayloadV5ResponseJson{
+		ShouldOverrideBuilder: true,
+		ExecutionPayload: &pb.ExecutionPayloadDenebJSON{
+			ParentHash:    &common.Hash{'a'},
+			FeeRecipient:  &common.Address{'b'},
+			StateRoot:     &common.Hash{'c'},
+			ReceiptsRoot:  &common.Hash{'d'},
+			LogsBloom:     &hexutil.Bytes{'e'},
+			PrevRandao:    &common.Hash{'f'},
+			BaseFeePerGas: "0x123",
+			BlockHash:     &common.Hash{'g'},
+			Transactions:  []hexutil.Bytes{{'h'}},
+			Withdrawals:   []*pb.Withdrawal{},
+			BlockNumber:   &hexUint,
+			GasLimit:      &hexUint,
+			GasUsed:       &hexUint,
+			Timestamp:     &hexUint,
+			BlobGasUsed:   &bgu,
+			ExcessBlobGas: &ebg,
+		},
+		BlockValue: "0x11fffffffff",
+		BlobsBundle: &pb.BlobBundleV2JSON{
+			Commitments: []hexutil.Bytes{[]byte("commitment1"), []byte("commitment2")},
+			Proofs:      []hexutil.Bytes{[]byte("proof1"), []byte("proof2")},
+			Blobs:       []hexutil.Bytes{{'a'}, {'b'}},
+		},
+		ExecutionRequests: []hexutil.Bytes{append([]byte{pb.DepositRequestType}, depositRequestBytes...),
+			append([]byte{pb.WithdrawalRequestType}, withdrawalRequestBytes...),
+			append([]byte{pb.ConsolidationRequestType}, consolidationRequestBytes...)},
+	}
 	parent := bytesutil.PadTo([]byte("parentHash"), fieldparams.RootLength)
 	sha3Uncles := bytesutil.PadTo([]byte("sha3Uncles"), fieldparams.RootLength)
 	miner := bytesutil.PadTo([]byte("miner"), fieldparams.FeeRecipientLength)
@@ -1868,6 +1946,7 @@ func fixturesStruct() *payloadFixtures {
 		ExecutionPayloadWithValueCapella:  executionPayloadWithValueFixtureCapella,
 		ExecutionPayloadWithValueDeneb:    executionPayloadWithValueFixtureDeneb,
 		ExecutionBundleElectra:            executionBundleFixtureElectra,
+		ExecutionBundleFulu:               executionBundleFixtureFulu,
 		ValidPayloadStatus:                validStatus,
 		InvalidBlockHashStatus:            inValidBlockHashStatus,
 		AcceptedStatus:                    acceptedStatus,
@@ -1892,6 +1971,7 @@ type payloadFixtures struct {
 	ExecutionPayloadWithValueCapella  *pb.GetPayloadV2ResponseJson
 	ExecutionPayloadWithValueDeneb    *pb.GetPayloadV3ResponseJson
 	ExecutionBundleElectra            *pb.GetPayloadV4ResponseJson
+	ExecutionBundleFulu               *pb.GetPayloadV5ResponseJson
 	ValidPayloadStatus                *pb.PayloadStatus
 	InvalidBlockHashStatus            *pb.PayloadStatus
 	AcceptedStatus                    *pb.PayloadStatus
@@ -2361,7 +2441,7 @@ func Test_ExchangeCapabilities(t *testing.T) {
 		for _, item := range results {
 			require.NotNil(t, item)
 		}
-		assert.LogsContain(t, logHook, "Please update client, detected the following unsupported engine methods:")
+		assert.LogsContain(t, logHook, "Connected execution client does not support some requested engine methods")
 	})
 	t.Run("list of items", func(t *testing.T) {
 		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -2424,7 +2504,7 @@ func TestReconstructBlobSidecars(t *testing.T) {
 	t.Run("get-blobs end point is not supported", func(t *testing.T) {
 		hi := mockSummary(t, []bool{true, true, true, true, true, false})
 		verifiedBlobs, err := client.ReconstructBlobSidecars(ctx, sb, r, hi)
-		require.NoError(t, err)
+		require.ErrorContains(t, "engine_getBlobsV1 is not supported", err)
 		require.Equal(t, 0, len(verifiedBlobs))
 	})
 
@@ -2476,6 +2556,76 @@ func TestReconstructBlobSidecars(t *testing.T) {
 	})
 }
 
+func TestReconstructDataColumnSidecars(t *testing.T) {
+	// Start the trusted setup.
+	err := kzg.Start()
+	require.NoError(t, err)
+
+	// Setup right fork epoch
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.CapellaForkEpoch = 1
+	cfg.DenebForkEpoch = 2
+	cfg.ElectraForkEpoch = 3
+	cfg.FuluForkEpoch = 4
+	params.OverrideBeaconConfig(cfg)
+
+	client := &Service{capabilityCache: &capabilityCache{}}
+	b := util.NewBeaconBlockFulu()
+	b.Block.Slot = 4 * params.BeaconConfig().SlotsPerEpoch
+	kzgCommitments := createRandomKzgCommitments(t, 6)
+	b.Block.Body.BlobKzgCommitments = kzgCommitments
+	r, err := b.Block.HashTreeRoot()
+	require.NoError(t, err)
+	sb, err := blocks.NewSignedBeaconBlock(b)
+	require.NoError(t, err)
+
+	ctx := context.Background()
+
+	t.Run("GetBlobsV2 is not supported", func(t *testing.T) {
+		_, err := client.ReconstructDataColumnSidecars(ctx, sb, r)
+		require.ErrorContains(t, "get blobs V2 for block", err)
+	})
+
+	t.Run("nothing received", func(t *testing.T) {
+		srv := createBlobServerV2(t, 0, []bool{})
+		defer srv.Close()
+
+		rpcClient, client := setupRpcClientV2(t, srv.URL, client)
+		defer rpcClient.Close()
+
+		dataColumns, err := client.ReconstructDataColumnSidecars(ctx, sb, r)
+		require.NoError(t, err)
+		require.Equal(t, 0, len(dataColumns))
+	})
+
+	t.Run("receiving all blobs", func(t *testing.T) {
+		blobMasks := []bool{true, true, true, true, true, true}
+		srv := createBlobServerV2(t, 6, blobMasks)
+		defer srv.Close()
+
+		rpcClient, client := setupRpcClientV2(t, srv.URL, client)
+		defer rpcClient.Close()
+
+		dataColumns, err := client.ReconstructDataColumnSidecars(ctx, sb, r)
+		require.NoError(t, err)
+		require.Equal(t, 128, len(dataColumns))
+	})
+
+	t.Run("missing some blobs", func(t *testing.T) {
+		blobMasks := []bool{false, true, true, true, true, true}
+		srv := createBlobServerV2(t, 6, blobMasks)
+		defer srv.Close()
+
+		rpcClient, client := setupRpcClientV2(t, srv.URL, client)
+		defer rpcClient.Close()
+
+		dataColumns, err := client.ReconstructDataColumnSidecars(ctx, sb, r)
+		require.ErrorContains(t, errMissingBlobsAndProofsFromEL.Error(), err)
+		require.Equal(t, 0, len(dataColumns))
+	})
+}
+
 func createRandomKzgCommitments(t *testing.T, num int) [][]byte {
 	kzgCommitments := make([][]byte, num)
 	for i := range kzgCommitments {
@@ -2511,6 +2661,42 @@ func createBlobServer(t *testing.T, numBlobs int, callbackFuncs ...func()) *http
 	}))
 }
 
+func createBlobServerV2(t *testing.T, numBlobs int, blobMasks []bool) *httptest.Server {
+	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		defer func() {
+			require.NoError(t, r.Body.Close())
+		}()
+
+		require.Equal(t, len(blobMasks), numBlobs)
+
+		blobAndCellProofs := make([]*pb.BlobAndProofV2Json, numBlobs)
+		for i := range blobAndCellProofs {
+			if !blobMasks[i] {
+				continue
+			}
+
+			blobAndCellProofs[i] = &pb.BlobAndProofV2Json{
+				Blob:      []byte("0xblob"),
+				KzgProofs: []hexutil.Bytes{},
+			}
+			for j := 0; j < int(params.BeaconConfig().NumberOfColumns); j++ {
+				cellProof := make([]byte, 48)
+				blobAndCellProofs[i].KzgProofs = append(blobAndCellProofs[i].KzgProofs, cellProof)
+			}
+		}
+
+		respJSON := map[string]interface{}{
+			"jsonrpc": "2.0",
+			"id":      1,
+			"result":  blobAndCellProofs,
+		}
+
+		err := json.NewEncoder(w).Encode(respJSON)
+		require.NoError(t, err)
+	}))
+}
+
 func setupRpcClient(t *testing.T, url string, client *Service) (*rpc.Client, *Service) {
 	rpcClient, err := rpc.DialHTTP(url)
 	require.NoError(t, err)
@@ -2522,6 +2708,12 @@ func setupRpcClient(t *testing.T, url string, client *Service) (*rpc.Client, *Se
 	return rpcClient, client
 }
 
+func setupRpcClientV2(t *testing.T, url string, client *Service) (*rpc.Client, *Service) {
+	rpcClient, client := setupRpcClient(t, url, client)
+	client.capabilityCache = &capabilityCache{capabilities: map[string]interface{}{GetBlobsV2: nil}}
+	return rpcClient, client
+}
+
 func testNewBlobVerifier() verification.NewBlobVerifier {
 	return func(b blocks.ROBlob, reqs []verification.Requirement) verification.BlobVerifier {
 		return &verification.MockBlobVerifier{

beacon-chain/execution/testing/mock_engine_client.go

@@ -38,6 +38,8 @@ type EngineClient struct {
 	ErrGetPayload               error
 	BlobSidecars                []blocks.VerifiedROBlob
 	ErrorBlobSidecars           error
+	DataColumnSidecars          []blocks.VerifiedRODataColumn
+	ErrorDataColumnSidecars     error
 }
 
 // NewPayload --
@@ -113,6 +115,10 @@ func (e *EngineClient) ReconstructBlobSidecars(context.Context, interfaces.ReadO
 	return e.BlobSidecars, e.ErrorBlobSidecars
 }
 
+func (e *EngineClient) ReconstructDataColumnSidecars(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte) ([]blocks.VerifiedRODataColumn, error) {
+	return e.DataColumnSidecars, e.ErrorDataColumnSidecars
+}
+
 // GetTerminalBlockHash --
 func (e *EngineClient) GetTerminalBlockHash(ctx context.Context, transitionTime uint64) ([]byte, bool, error) {
 	ttd := new(big.Int)

beacon-chain/node/node.go

@@ -87,45 +87,47 @@ type serviceFlagOpts struct {
 // full PoS node. It handles the lifecycle of the entire system and registers
 // services to a service registry.
 type BeaconNode struct {
-	cliCtx                  *cli.Context
-	ctx                     context.Context
-	cancel                  context.CancelFunc
-	services                *runtime.ServiceRegistry
-	lock                    sync.RWMutex
-	stop                    chan struct{} // Channel to wait for termination notifications.
-	db                      db.Database
-	slasherDB               db.SlasherDatabase
-	attestationCache        *cache.AttestationCache
-	attestationPool         attestations.Pool
-	exitPool                voluntaryexits.PoolManager
-	slashingsPool           slashings.PoolManager
-	syncCommitteePool       synccommittee.Pool
-	blsToExecPool           blstoexec.PoolManager
-	depositCache            cache.DepositCache
-	trackedValidatorsCache  *cache.TrackedValidatorsCache
-	payloadIDCache          *cache.PayloadIDCache
-	stateFeed               *event.Feed
-	blockFeed               *event.Feed
-	opFeed                  *event.Feed
-	stateGen                *stategen.State
-	collector               *bcnodeCollector
-	slasherBlockHeadersFeed *event.Feed
-	slasherAttestationsFeed *event.Feed
-	finalizedStateAtStartUp state.BeaconState
-	serviceFlagOpts         *serviceFlagOpts
-	GenesisInitializer      genesis.Initializer
-	CheckpointInitializer   checkpoint.Initializer
-	forkChoicer             forkchoice.ForkChoicer
-	clockWaiter             startup.ClockWaiter
-	BackfillOpts            []backfill.ServiceOption
-	initialSyncComplete     chan struct{}
-	BlobStorage             *filesystem.BlobStorage
-	BlobStorageOptions      []filesystem.BlobStorageOption
-	custodyInfo             *peerdas.CustodyInfo
-	verifyInitWaiter        *verification.InitializerWaiter
-	syncChecker             *initialsync.SyncChecker
-	slasherEnabled          bool
-	lcStore                 *lightclient.Store
+	cliCtx                   *cli.Context
+	ctx                      context.Context
+	cancel                   context.CancelFunc
+	services                 *runtime.ServiceRegistry
+	lock                     sync.RWMutex
+	stop                     chan struct{} // Channel to wait for termination notifications.
+	db                       db.Database
+	slasherDB                db.SlasherDatabase
+	attestationCache         *cache.AttestationCache
+	attestationPool          attestations.Pool
+	exitPool                 voluntaryexits.PoolManager
+	slashingsPool            slashings.PoolManager
+	syncCommitteePool        synccommittee.Pool
+	blsToExecPool            blstoexec.PoolManager
+	depositCache             cache.DepositCache
+	trackedValidatorsCache   *cache.TrackedValidatorsCache
+	payloadIDCache           *cache.PayloadIDCache
+	stateFeed                *event.Feed
+	blockFeed                *event.Feed
+	opFeed                   *event.Feed
+	stateGen                 *stategen.State
+	collector                *bcnodeCollector
+	slasherBlockHeadersFeed  *event.Feed
+	slasherAttestationsFeed  *event.Feed
+	finalizedStateAtStartUp  state.BeaconState
+	serviceFlagOpts          *serviceFlagOpts
+	GenesisInitializer       genesis.Initializer
+	CheckpointInitializer    checkpoint.Initializer
+	forkChoicer              forkchoice.ForkChoicer
+	clockWaiter              startup.ClockWaiter
+	BackfillOpts             []backfill.ServiceOption
+	initialSyncComplete      chan struct{}
+	BlobStorage              *filesystem.BlobStorage
+	BlobStorageOptions       []filesystem.BlobStorageOption
+	DataColumnStorage        *filesystem.DataColumnStorage
+	DataColumnStorageOptions []filesystem.DataColumnStorageOption
+	custodyInfo              *peerdas.CustodyInfo
+	verifyInitWaiter         *verification.InitializerWaiter
+	syncChecker              *initialsync.SyncChecker
+	slasherEnabled           bool
+	lcStore                  *lightclient.Store
 }
 
 // New creates a new node instance, sets up configuration options, and registers
@@ -193,6 +195,15 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 		beacon.BlobStorage = blobs
 	}
 
+	if beacon.DataColumnStorage == nil {
+		dataColumnStorage, err := filesystem.NewDataColumnStorage(cliCtx.Context, beacon.DataColumnStorageOptions...)
+		if err != nil {
+			return nil, errors.Wrap(err, "new data column storage")
+		}
+
+		beacon.DataColumnStorage = dataColumnStorage
+	}
+
 	bfs, err := startBaseServices(cliCtx, beacon, depositAddress)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not start modules")
@@ -285,6 +296,7 @@ func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress s
 	}
 
 	beacon.BlobStorage.WarmCache()
+	beacon.DataColumnStorage.WarmCache()
 
 	log.Debugln("Starting Slashing DB")
 	if err := beacon.startSlasherDB(cliCtx); err != nil {
@@ -495,6 +507,10 @@ func (b *BeaconNode) clearDB(clearDB, forceClearDB bool, d *kv.Store, dbPath str
 			return nil, errors.Wrap(err, "could not clear blob storage")
 		}
 
+		if err := b.DataColumnStorage.Clear(); err != nil {
+			return nil, errors.Wrap(err, "could not clear data column storage")
+		}
+
 		d, err = kv.NewKVStore(b.ctx, dbPath)
 		if err != nil {
 			return nil, errors.Wrap(err, "could not create new database")
@@ -780,6 +796,7 @@ func (b *BeaconNode) registerBlockchainService(fc forkchoice.ForkChoicer, gs *st
 		blockchain.WithClockSynchronizer(gs),
 		blockchain.WithSyncComplete(syncComplete),
 		blockchain.WithBlobStorage(b.BlobStorage),
+		blockchain.WithDataColumnStorage(b.DataColumnStorage),
 		blockchain.WithTrackedValidatorsCache(b.trackedValidatorsCache),
 		blockchain.WithPayloadIDCache(b.payloadIDCache),
 		blockchain.WithSyncChecker(b.syncChecker),
@@ -868,8 +885,11 @@ func (b *BeaconNode) registerSyncService(initialSyncComplete chan struct{}, bFil
 		regularsync.WithInitialSyncComplete(initialSyncComplete),
 		regularsync.WithStateNotifier(b),
 		regularsync.WithBlobStorage(b.BlobStorage),
+		regularsync.WithDataColumnStorage(b.DataColumnStorage),
 		regularsync.WithVerifierWaiter(b.verifyInitWaiter),
 		regularsync.WithAvailableBlocker(bFillStore),
+		regularsync.WithTrackedValidatorsCache(b.trackedValidatorsCache),
+		regularsync.WithCustodyInfo(b.custodyInfo),
 		regularsync.WithSlasherEnabled(b.slasherEnabled),
 		regularsync.WithLightClientStore(b.lcStore),
 	)
@@ -895,6 +915,8 @@ func (b *BeaconNode) registerInitialSyncService(complete chan struct{}) error {
 		ClockWaiter:         b.clockWaiter,
 		InitialSyncComplete: complete,
 		BlobStorage:         b.BlobStorage,
+		DataColumnStorage:   b.DataColumnStorage,
+		CustodyInfo:         b.custodyInfo,
 	}, opts...)
 	return b.services.RegisterService(is)
 }
@@ -989,6 +1011,7 @@ func (b *BeaconNode) registerRPCService(router *http.ServeMux) error {
 		FinalizationFetcher:       chainService,
 		BlockReceiver:             chainService,
 		BlobReceiver:              chainService,
+		DataColumnReceiver:        chainService,
 		AttestationReceiver:       chainService,
 		GenesisTimeFetcher:        chainService,
 		GenesisFetcher:            chainService,
@@ -1016,6 +1039,7 @@ func (b *BeaconNode) registerRPCService(router *http.ServeMux) error {
 		Router:                    router,
 		ClockWaiter:               b.clockWaiter,
 		BlobStorage:               b.BlobStorage,
+		DataColumnStorage:         b.DataColumnStorage,
 		TrackedValidatorsCache:    b.trackedValidatorsCache,
 		PayloadIDCache:            b.payloadIDCache,
 		LCStore:                   b.lcStore,
@@ -1157,6 +1181,7 @@ func (b *BeaconNode) registerPrunerService(cliCtx *cli.Context) error {
 
 func (b *BeaconNode) RegisterBackfillService(cliCtx *cli.Context, bfs *backfill.Store) error {
 	pa := peers.NewAssigner(b.fetchP2P().Peers(), b.forkChoicer)
+	// TODO: Add backfill for data column storage
 	bf, err := backfill.NewService(cliCtx.Context, bfs, b.BlobStorage, b.clockWaiter, b.fetchP2P(), pa, b.BackfillOpts...)
 	if err != nil {
 		return errors.Wrap(err, "error initializing backfill service")

beacon-chain/node/node_test.go

@@ -54,7 +54,7 @@ func TestNodeClose_OK(t *testing.T) {
 	cmd.ValidatorMonitorIndicesFlag.Value.SetInt(1)
 	ctx, cancel := newCliContextWithCancel(&app, set)
 
-	node, err := New(ctx, cancel, WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)))
+	node, err := New(ctx, cancel, WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)), WithDataColumnStorage(filesystem.NewEphemeralDataColumnStorage(t)))
 	require.NoError(t, err)
 
 	node.Close()
@@ -75,7 +75,7 @@ func TestNodeStart_Ok(t *testing.T) {
 	node, err := New(ctx, cancel, WithBlockchainFlagOptions([]blockchain.Option{}),
 		WithBuilderFlagOptions([]builder.Option{}),
 		WithExecutionChainOptions([]execution.Option{}),
-		WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)))
+		WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)), WithDataColumnStorage(filesystem.NewEphemeralDataColumnStorage(t)))
 	require.NoError(t, err)
 	node.services = &runtime.ServiceRegistry{}
 	go func() {
@@ -99,7 +99,7 @@ func TestNodeStart_SyncChecker(t *testing.T) {
 	node, err := New(ctx, cancel, WithBlockchainFlagOptions([]blockchain.Option{}),
 		WithBuilderFlagOptions([]builder.Option{}),
 		WithExecutionChainOptions([]execution.Option{}),
-		WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)))
+		WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)), WithDataColumnStorage(filesystem.NewEphemeralDataColumnStorage(t)))
 	require.NoError(t, err)
 	go func() {
 		node.Start()
@@ -130,7 +130,7 @@ func TestClearDB(t *testing.T) {
 	context, cancel := newCliContextWithCancel(&app, set)
 	options := []Option{
 		WithExecutionChainOptions([]execution.Option{execution.WithHttpEndpoint(endpoint)}),
-		WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)),
+		WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)), WithDataColumnStorage(filesystem.NewEphemeralDataColumnStorage(t)),
 	}
 	_, err = New(context, cancel, options...)
 	require.NoError(t, err)

beacon-chain/node/options.go

@@ -50,3 +50,20 @@ func WithBlobStorageOptions(opt ...filesystem.BlobStorageOption) Option {
 		return nil
 	}
 }
+
+// WithDataColumnStorage sets the DataColumnStorage backend for the BeaconNode
+func WithDataColumnStorage(bs *filesystem.DataColumnStorage) Option {
+	return func(bn *BeaconNode) error {
+		bn.DataColumnStorage = bs
+		return nil
+	}
+}
+
+// WithDataColumnStorageOptions appends 1 or more filesystem.DataColumnStorageOption on the beacon node,
+// to be used when initializing data column storage.
+func WithDataColumnStorageOptions(opt ...filesystem.DataColumnStorageOption) Option {
+	return func(bn *BeaconNode) error {
+		bn.DataColumnStorageOptions = append(bn.DataColumnStorageOptions, opt...)
+		return nil
+	}
+}

beacon-chain/p2p/BUILD.bazel

@@ -71,6 +71,7 @@ go_library(
         "//monitoring/tracing:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
         "//network:go_default_library",
+        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/metadata:go_default_library",
         "//runtime:go_default_library",
@@ -167,6 +168,7 @@ go_test(
         "//crypto/hash:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//network:go_default_library",
+        "//network/forks:go_default_library",
         "//proto/eth/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/metadata:go_default_library",

beacon-chain/p2p/broadcaster.go

@@ -15,6 +15,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
@@ -278,8 +279,14 @@ func (s *Service) BroadcastLightClientOptimisticUpdate(ctx context.Context, upda
 		return errors.New("attempted to broadcast nil light client optimistic update")
 	}
 
-	digest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
-	if err := s.broadcastObject(ctx, update, lcOptimisticToTopic(digest)); err != nil {
+	forkDigest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), s.genesisValidatorsRoot)
+	if err != nil {
+		err := errors.Wrap(err, "could not retrieve fork digest")
+		tracing.AnnotateError(span, err)
+		return err
+	}
+
+	if err := s.broadcastObject(ctx, update, lcOptimisticToTopic(forkDigest)); err != nil {
 		log.WithError(err).Debug("Failed to broadcast light client optimistic update")
 		err := errors.Wrap(err, "could not publish message")
 		tracing.AnnotateError(span, err)
@@ -298,7 +305,13 @@ func (s *Service) BroadcastLightClientFinalityUpdate(ctx context.Context, update
 		return errors.New("attempted to broadcast nil light client finality update")
 	}
 
-	forkDigest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
+	forkDigest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), s.genesisValidatorsRoot)
+	if err != nil {
+		err := errors.Wrap(err, "could not retrieve fork digest")
+		tracing.AnnotateError(span, err)
+		return err
+	}
+
 	if err := s.broadcastObject(ctx, update, lcFinalityToTopic(forkDigest)); err != nil {
 		log.WithError(err).Debug("Failed to broadcast light client finality update")
 		err := errors.Wrap(err, "could not publish message")

beacon-chain/p2p/broadcaster_test.go

@@ -18,10 +18,10 @@ import (
 	p2ptest "github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/testing"
 	"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/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/wrapper"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	testpb "github.com/OffchainLabs/prysm/v6/proto/testing"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
@@ -550,7 +550,9 @@ func TestService_BroadcastLightClientOptimisticUpdate(t *testing.T) {
 	require.NoError(t, err)
 
 	GossipTypeMapping[reflect.TypeOf(msg)] = LightClientOptimisticUpdateTopicFormat
-	topic := fmt.Sprintf(LightClientOptimisticUpdateTopicFormat, params.ForkDigest(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot)))
+	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot), p.genesisValidatorsRoot)
+	require.NoError(t, err)
+	topic := fmt.Sprintf(LightClientOptimisticUpdateTopicFormat, digest)
 
 	// External peer subscribes to the topic.
 	topic += p.Encoding().ProtocolSuffix()
@@ -615,7 +617,9 @@ func TestService_BroadcastLightClientFinalityUpdate(t *testing.T) {
 	require.NoError(t, err)
 
 	GossipTypeMapping[reflect.TypeOf(msg)] = LightClientFinalityUpdateTopicFormat
-	topic := fmt.Sprintf(LightClientFinalityUpdateTopicFormat, params.ForkDigest(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot)))
+	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot), p.genesisValidatorsRoot)
+	require.NoError(t, err)
+	topic := fmt.Sprintf(LightClientFinalityUpdateTopicFormat, digest)
 
 	// External peer subscribes to the topic.
 	topic += p.Encoding().ProtocolSuffix()
@@ -708,7 +712,7 @@ func TestService_BroadcastDataColumn(t *testing.T) {
 	subnet := peerdas.ComputeSubnetForDataColumnSidecar(columnIndex)
 	topic := fmt.Sprintf(topicFormat, digest, subnet)
 
-	roSidecars, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, util.DataColumnsParamsByRoot{{}: {{ColumnIndex: columnIndex}}})
+	roSidecars, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, []util.DataColumnParam{{Index: columnIndex}})
 	sidecar := roSidecars[0].DataColumnSidecar
 
 	// Async listen for the pubsub, must be before the broadcast.

beacon-chain/p2p/discovery.go

@@ -222,7 +222,6 @@ func (s *Service) RefreshPersistentSubnets() {
 	// Get the sync subnet bitfield in our metadata.
 	currentBitSInMetadata := s.Metadata().SyncnetsBitfield()
 
-	// Is our sync bitvector record up to date?
 	isBitSUpToDate := bytes.Equal(bitS, inRecordBitS) && bytes.Equal(bitS, currentBitSInMetadata)
 
 	// Compare current epoch with the Fulu fork epoch.
@@ -504,7 +503,7 @@ func (s *Service) createLocalNode(
 	localNode.SetFallbackIP(ipAddr)
 	localNode.SetFallbackUDP(udpPort)
 
-	localNode, err = addForkEntry(localNode, s.clock.CurrentEpoch())
+	localNode, err = addForkEntry(localNode, s.genesisTime, s.genesisValidatorsRoot)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not add eth2 fork version entry to enr")
 	}

beacon-chain/p2p/fork.go

@@ -3,10 +3,13 @@ package p2p
 import (
 	"bytes"
 	"fmt"
+	"time"
 
 	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	prysmTime "github.com/OffchainLabs/prysm/v6/time"
+	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/pkg/errors"
@@ -22,7 +25,7 @@ func (s *Service) currentForkDigest() ([4]byte, error) {
 	if !s.isInitialized() {
 		return [4]byte{}, errors.New("state is not initialized")
 	}
-	return params.ForkDigest(s.clock.CurrentEpoch()), nil
+	return forks.CreateForkDigest(s.genesisTime, s.genesisValidatorsRoot)
 }
 
 // Compares fork ENRs between an incoming peer's record and our node's
@@ -76,9 +79,24 @@ func (s *Service) compareForkENR(record *enr.Record) error {
 // which takes into account the current fork version from the current
 // epoch to create a fork digest, the next fork version,
 // and the next fork epoch.
-func addForkEntry(node *enode.LocalNode, current primitives.Epoch) (*enode.LocalNode, error) {
-	digest := params.ForkDigest(current)
-	nextForkVersion, nextForkEpoch := params.NextForkData(current)
+func addForkEntry(
+	node *enode.LocalNode,
+	genesisTime time.Time,
+	genesisValidatorsRoot []byte,
+) (*enode.LocalNode, error) {
+	digest, err := forks.CreateForkDigest(genesisTime, genesisValidatorsRoot)
+	if err != nil {
+		return nil, err
+	}
+	currentSlot := slots.Since(genesisTime)
+	currentEpoch := slots.ToEpoch(currentSlot)
+	if prysmTime.Now().Before(genesisTime) {
+		currentEpoch = 0
+	}
+	nextForkVersion, nextForkEpoch, err := forks.NextForkData(currentEpoch)
+	if err != nil {
+		return nil, err
+	}
 	enrForkID := &pb.ENRForkID{
 		CurrentForkDigest: digest[:],
 		NextForkVersion:   nextForkVersion[:],

beacon-chain/p2p/fork_test.go

@@ -11,11 +11,11 @@ import (
 
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	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/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -231,8 +231,10 @@ func TestDiscv5_AddRetrieveForkEntryENR(t *testing.T) {
 	nextForkVersion := []byte{0, 0, 0, 1}
 	params.OverrideBeaconConfig(c)
 
-	clock := startup.NewClock(time.Now(), [32]byte{})
-	digest := params.ForkDigest(clock.CurrentEpoch())
+	genesisTime := time.Now()
+	genesisValidatorsRoot := make([]byte, 32)
+	digest, err := forks.CreateForkDigest(genesisTime, make([]byte, 32))
+	require.NoError(t, err)
 	enrForkID := &pb.ENRForkID{
 		CurrentForkDigest: digest[:],
 		NextForkVersion:   nextForkVersion,
@@ -254,7 +256,7 @@ func TestDiscv5_AddRetrieveForkEntryENR(t *testing.T) {
 	localNode := enode.NewLocalNode(db, pkey)
 	localNode.Set(entry)
 
-	want, err := signing.ComputeForkDigest([]byte{0, 0, 0, 0}, clock.GenesisValidatorsRootSlice())
+	want, err := signing.ComputeForkDigest([]byte{0, 0, 0, 0}, genesisValidatorsRoot)
 	require.NoError(t, err)
 
 	resp, err := forkEntry(localNode.Node().Record())
@@ -281,8 +283,7 @@ func TestAddForkEntry_Genesis(t *testing.T) {
 	params.OverrideBeaconConfig(bCfg)
 
 	localNode := enode.NewLocalNode(db, pkey)
-	clock := startup.NewClock(time.Now(), bCfg.GenesisValidatorsRoot)
-	localNode, err = addForkEntry(localNode, clock.CurrentEpoch())
+	localNode, err = addForkEntry(localNode, time.Now().Add(10*time.Second), bytesutil.PadTo([]byte{'A', 'B', 'C', 'D'}, 32))
 	require.NoError(t, err)
 	forkEntry, err := forkEntry(localNode.Node().Record())
 	require.NoError(t, err)

beacon-chain/p2p/fork_watcher.go

@@ -25,7 +25,7 @@ func (s *Service) forkWatcher() {
 				// this over the epoch, which might be slightly wasteful
 				// but is fine nonetheless.
 				if s.dv5Listener != nil { // make sure it's not a local network
-					_, err := addForkEntry(s.dv5Listener.LocalNode(), s.clock.CurrentEpoch())
+					_, err := addForkEntry(s.dv5Listener.LocalNode(), s.genesisTime, s.genesisValidatorsRoot)
 					if err != nil {
 						log.WithError(err).Error("Could not add fork entry")
 					}

beacon-chain/p2p/message_id.go

@@ -7,6 +7,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/math"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
 )
 
@@ -38,7 +39,7 @@ func MsgID(genesisValidatorsRoot []byte, pmsg *pubsubpb.Message) string {
 		copy(msg, "invalid")
 		return bytesutil.UnsafeCastToString(msg)
 	}
-	_, fEpoch, err := params.ForkDataFromDigest(digest)
+	_, fEpoch, err := forks.RetrieveForkDataFromDigest(digest, genesisValidatorsRoot)
 	if err != nil {
 		// Impossible condition that should
 		// never be hit.

beacon-chain/p2p/message_id_test.go

@@ -7,10 +7,10 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/golang/snappy"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
@@ -18,22 +18,22 @@ import (
 
 func TestMsgID_HashesCorrectly(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	clock := startup.NewClock(time.Now(), bytesutil.ToBytes32([]byte{'A'}))
-	valRoot := clock.GenesisValidatorsRoot()
-	d := params.ForkDigest(clock.CurrentEpoch())
+	genesisValidatorsRoot := bytesutil.PadTo([]byte{'A'}, 32)
+	d, err := forks.CreateForkDigest(time.Now(), genesisValidatorsRoot)
+	assert.NoError(t, err)
 	tpc := fmt.Sprintf(p2p.BlockSubnetTopicFormat, d)
 	invalidSnappy := [32]byte{'J', 'U', 'N', 'K'}
 	pMsg := &pubsubpb.Message{Data: invalidSnappy[:], Topic: &tpc}
 	hashedData := hash.Hash(append(params.BeaconConfig().MessageDomainInvalidSnappy[:], pMsg.Data...))
 	msgID := string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(valRoot[:], pMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, pMsg), "Got incorrect msg id")
 
 	validObj := [32]byte{'v', 'a', 'l', 'i', 'd'}
 	enc := snappy.Encode(nil, validObj[:])
 	nMsg := &pubsubpb.Message{Data: enc, Topic: &tpc}
 	hashedData = hash.Hash(append(params.BeaconConfig().MessageDomainValidSnappy[:], validObj[:]...))
 	msgID = string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(valRoot[:], nMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, nMsg), "Got incorrect msg id")
 }
 
 func TestMessageIDFunction_HashesCorrectlyAltair(t *testing.T) {

beacon-chain/p2p/peers/peerdata/store.go

@@ -54,7 +54,7 @@ type PeerData struct {
 	NextValidTime time.Time
 	// Chain related data.
 	MetaData                  metadata.Metadata
-	ChainState                *ethpb.Status
+	ChainState                *ethpb.StatusV2
 	ChainStateLastUpdated     time.Time
 	ChainStateValidationError error
 	// Scorers internal data.

beacon-chain/p2p/peers/scorers/bad_responses.go

@@ -5,7 +5,6 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/peerdata"
 	"github.com/libp2p/go-libp2p/core/peer"
-	"github.com/pkg/errors"
 )
 
 var _ Scorer = (*BadResponsesScorer)(nil)
@@ -129,13 +128,14 @@ func (s *BadResponsesScorer) IsBadPeer(pid peer.ID) error {
 
 // isBadPeerNoLock is lock-free version of IsBadPeer.
 func (s *BadResponsesScorer) isBadPeerNoLock(pid peer.ID) error {
-	if peerData, ok := s.store.PeerData(pid); ok {
-		if peerData.BadResponses >= s.config.Threshold {
-			return errors.Errorf("peer exceeded bad responses threshold: got %d, threshold %d", peerData.BadResponses, s.config.Threshold)
-		}
+	// if peerData, ok := s.store.PeerData(pid); ok {
+	// TODO: Remote this out of devnet
+	// if peerData.BadResponses >= s.config.Threshold {
+	// return errors.Errorf("peer exceeded bad responses threshold: got %d, threshold %d", peerData.BadResponses, s.config.Threshold)
+	// }
 
-		return nil
-	}
+	// return nil
+	// }
 
 	return nil
 }

beacon-chain/p2p/peers/scorers/bad_responses_test.go

@@ -1,7 +1,6 @@
 package scorers_test
 
 import (
-	"sort"
 	"testing"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
@@ -13,39 +12,41 @@ import (
 	"github.com/libp2p/go-libp2p/core/peer"
 )
 
-func TestScorers_BadResponses_Score(t *testing.T) {
-	const pid = "peer1"
+// TODO: Uncomment when out of devnet
+// func TestScorers_BadResponses_Score(t *testing.T) {
+// 	const pid = "peer1"
 
-	ctx := t.Context()
+// 	ctx, cancel := context.WithCancel(context.Background())
+// 	defer cancel()
 
-	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold: 4,
-			},
-		},
-	})
-	scorer := peerStatuses.Scorers().BadResponsesScorer()
+// 	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold: 4,
+// 			},
+// 		},
+// 	})
+// 	scorer := peerStatuses.Scorers().BadResponsesScorer()
 
-	assert.Equal(t, 0., scorer.Score(pid), "Unexpected score for unregistered peer")
+// 	assert.Equal(t, 0., scorer.Score(pid), "Unexpected score for unregistered peer")
 
-	scorer.Increment(pid)
-	assert.NoError(t, scorer.IsBadPeer(pid))
-	assert.Equal(t, -2.5, scorer.Score(pid))
+// 	scorer.Increment(pid)
+// 	assert.NoError(t, scorer.IsBadPeer(pid))
+// 	assert.Equal(t, -2.5, scorer.Score(pid))
 
-	scorer.Increment(pid)
-	assert.NoError(t, scorer.IsBadPeer(pid))
-	assert.Equal(t, float64(-5), scorer.Score(pid))
+// 	scorer.Increment(pid)
+// 	assert.NoError(t, scorer.IsBadPeer(pid))
+// 	assert.Equal(t, float64(-5), scorer.Score(pid))
 
-	scorer.Increment(pid)
-	assert.NoError(t, scorer.IsBadPeer(pid))
-	assert.Equal(t, float64(-7.5), scorer.Score(pid))
+// 	scorer.Increment(pid)
+// 	assert.NoError(t, scorer.IsBadPeer(pid))
+// 	assert.Equal(t, float64(-7.5), scorer.Score(pid))
 
-	scorer.Increment(pid)
-	assert.NotNil(t, scorer.IsBadPeer(pid))
-	assert.Equal(t, -100.0, scorer.Score(pid))
-}
+// 	scorer.Increment(pid)
+// 	assert.NotNil(t, scorer.IsBadPeer(pid))
+// 	assert.Equal(t, -100.0, scorer.Score(pid))
+// }
 
 func TestScorers_BadResponses_ParamsThreshold(t *testing.T) {
 	ctx := t.Context()
@@ -137,56 +138,60 @@ func TestScorers_BadResponses_Decay(t *testing.T) {
 	assert.Equal(t, 1, badResponses, "unexpected bad responses for pid3")
 }
 
-func TestScorers_BadResponses_IsBadPeer(t *testing.T) {
-	ctx := t.Context()
+// TODO: Uncomment when out of devnet
+// func TestScorers_BadResponses_IsBadPeer(t *testing.T) {
+// 	ctx, cancel := context.WithCancel(context.Background())
+// 	defer cancel()
 
-	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
-		PeerLimit:    30,
-		ScorerParams: &scorers.Config{},
-	})
-	scorer := peerStatuses.Scorers().BadResponsesScorer()
-	pid := peer.ID("peer1")
-	assert.NoError(t, scorer.IsBadPeer(pid))
+// 	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
+// 		PeerLimit:    30,
+// 		ScorerParams: &scorers.Config{},
+// 	})
+// 	scorer := peerStatuses.Scorers().BadResponsesScorer()
+// 	pid := peer.ID("peer1")
+// 	assert.NoError(t, scorer.IsBadPeer(pid))
 
-	peerStatuses.Add(nil, pid, nil, network.DirUnknown)
-	assert.NoError(t, scorer.IsBadPeer(pid))
+// 	peerStatuses.Add(nil, pid, nil, network.DirUnknown)
+// 	assert.NoError(t, scorer.IsBadPeer(pid))
 
-	for i := 0; i < scorers.DefaultBadResponsesThreshold; i++ {
-		scorer.Increment(pid)
-		if i == scorers.DefaultBadResponsesThreshold-1 {
-			assert.NotNil(t, scorer.IsBadPeer(pid), "Unexpected peer status")
-		} else {
-			assert.NoError(t, scorer.IsBadPeer(pid), "Unexpected peer status")
-		}
-	}
-}
+// 	for i := 0; i < scorers.DefaultBadResponsesThreshold; i++ {
+// 		scorer.Increment(pid)
+// 		if i == scorers.DefaultBadResponsesThreshold-1 {
+// 			assert.NotNil(t, scorer.IsBadPeer(pid), "Unexpected peer status")
+// 		} else {
+// 			assert.NoError(t, scorer.IsBadPeer(pid), "Unexpected peer status")
+// 		}
+// 	}
+// }
 
-func TestScorers_BadResponses_BadPeers(t *testing.T) {
-	ctx := t.Context()
+// TODO: Uncomment when out of devnet
+// func TestScorers_BadResponses_BadPeers(t *testing.T) {
+// 	ctx, cancel := context.WithCancel(context.Background())
+// 	defer cancel()
 
-	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
-		PeerLimit:    30,
-		ScorerParams: &scorers.Config{},
-	})
-	scorer := peerStatuses.Scorers().BadResponsesScorer()
-	pids := []peer.ID{peer.ID("peer1"), peer.ID("peer2"), peer.ID("peer3"), peer.ID("peer4"), peer.ID("peer5")}
-	for i := 0; i < len(pids); i++ {
-		peerStatuses.Add(nil, pids[i], nil, network.DirUnknown)
-	}
-	for i := 0; i < scorers.DefaultBadResponsesThreshold; i++ {
-		scorer.Increment(pids[1])
-		scorer.Increment(pids[2])
-		scorer.Increment(pids[4])
-	}
-	assert.NoError(t, scorer.IsBadPeer(pids[0]), "Invalid peer status")
-	assert.NotNil(t, scorer.IsBadPeer(pids[1]), "Invalid peer status")
-	assert.NotNil(t, scorer.IsBadPeer(pids[2]), "Invalid peer status")
-	assert.NoError(t, scorer.IsBadPeer(pids[3]), "Invalid peer status")
-	assert.NotNil(t, scorer.IsBadPeer(pids[4]), "Invalid peer status")
-	want := []peer.ID{pids[1], pids[2], pids[4]}
-	badPeers := scorer.BadPeers()
-	sort.Slice(badPeers, func(i, j int) bool {
-		return badPeers[i] < badPeers[j]
-	})
-	assert.DeepEqual(t, want, badPeers, "Unexpected list of bad peers")
-}
+// 	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
+// 		PeerLimit:    30,
+// 		ScorerParams: &scorers.Config{},
+// 	})
+// 	scorer := peerStatuses.Scorers().BadResponsesScorer()
+// 	pids := []peer.ID{peer.ID("peer1"), peer.ID("peer2"), peer.ID("peer3"), peer.ID("peer4"), peer.ID("peer5")}
+// 	for i := 0; i < len(pids); i++ {
+// 		peerStatuses.Add(nil, pids[i], nil, network.DirUnknown)
+// 	}
+// 	for i := 0; i < scorers.DefaultBadResponsesThreshold; i++ {
+// 		scorer.Increment(pids[1])
+// 		scorer.Increment(pids[2])
+// 		scorer.Increment(pids[4])
+// 	}
+// 	assert.NoError(t, scorer.IsBadPeer(pids[0]), "Invalid peer status")
+// 	assert.NotNil(t, scorer.IsBadPeer(pids[1]), "Invalid peer status")
+// 	assert.NotNil(t, scorer.IsBadPeer(pids[2]), "Invalid peer status")
+// 	assert.NoError(t, scorer.IsBadPeer(pids[3]), "Invalid peer status")
+// 	assert.NotNil(t, scorer.IsBadPeer(pids[4]), "Invalid peer status")
+// 	want := []peer.ID{pids[1], pids[2], pids[4]}
+// 	badPeers := scorer.BadPeers()
+// 	sort.Slice(badPeers, func(i, j int) bool {
+// 		return badPeers[i] < badPeers[j]
+// 	})
+// 	assert.DeepEqual(t, want, badPeers, "Unexpected list of bad peers")
+// }

beacon-chain/p2p/peers/scorers/gossip_scorer_test.go

@@ -42,7 +42,7 @@ func TestScorers_Gossip_Score(t *testing.T) {
 			},
 			check: func(scorer *scorers.GossipScorer) {
 				assert.Equal(t, 10.0, scorer.Score("peer1"), "Unexpected score")
-				assert.Equal(t, nil, scorer.IsBadPeer("peer1"), "Unexpected bad peer")
+				assert.NoError(t, scorer.IsBadPeer("peer1"), "Unexpected bad peer")
 				_, _, topicMap, err := scorer.GossipData("peer1")
 				assert.NoError(t, err)
 				assert.Equal(t, uint64(100), topicMap["a"].TimeInMesh, "incorrect time in mesh")

beacon-chain/p2p/peers/scorers/peer_status.go

@@ -112,7 +112,7 @@ func (s *PeerStatusScorer) BadPeers() []peer.ID {
 }
 
 // SetPeerStatus sets chain state data for a given peer.
-func (s *PeerStatusScorer) SetPeerStatus(pid peer.ID, chainState *pb.Status, validationError error) {
+func (s *PeerStatusScorer) SetPeerStatus(pid peer.ID, chainState *pb.StatusV2, validationError error) {
 	s.store.Lock()
 	defer s.store.Unlock()
 
@@ -130,14 +130,14 @@ func (s *PeerStatusScorer) SetPeerStatus(pid peer.ID, chainState *pb.Status, val
 // PeerStatus gets the chain state of the given remote peer.
 // This can return nil if there is no known chain state for the peer.
 // This will error if the peer does not exist.
-func (s *PeerStatusScorer) PeerStatus(pid peer.ID) (*pb.Status, error) {
+func (s *PeerStatusScorer) PeerStatus(pid peer.ID) (*pb.StatusV2, error) {
 	s.store.RLock()
 	defer s.store.RUnlock()
 	return s.peerStatusNoLock(pid)
 }
 
 // peerStatusNoLock lock-free version of PeerStatus.
-func (s *PeerStatusScorer) peerStatusNoLock(pid peer.ID) (*pb.Status, error) {
+func (s *PeerStatusScorer) peerStatusNoLock(pid peer.ID) (*pb.StatusV2, error) {
 	if peerData, ok := s.store.PeerData(pid); ok {
 		if peerData.ChainState == nil {
 			return nil, peerdata.ErrNoPeerStatus

beacon-chain/p2p/peers/scorers/peer_status_test.go

@@ -36,7 +36,7 @@ func TestScorers_PeerStatus_Score(t *testing.T) {
 			name: "existent bad peer",
 			update: func(scorer *scorers.PeerStatusScorer) {
 				scorer.SetHeadSlot(0)
-				scorer.SetPeerStatus("peer1", &pb.Status{
+				scorer.SetPeerStatus("peer1", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: 64,
 				}, p2ptypes.ErrWrongForkDigestVersion)
@@ -49,7 +49,7 @@ func TestScorers_PeerStatus_Score(t *testing.T) {
 			name: "existent peer no head slot for the host node is known",
 			update: func(scorer *scorers.PeerStatusScorer) {
 				scorer.SetHeadSlot(0)
-				scorer.SetPeerStatus("peer1", &pb.Status{
+				scorer.SetPeerStatus("peer1", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: 64,
 				}, nil)
@@ -62,7 +62,7 @@ func TestScorers_PeerStatus_Score(t *testing.T) {
 			name: "existent peer head is before ours",
 			update: func(scorer *scorers.PeerStatusScorer) {
 				scorer.SetHeadSlot(128)
-				scorer.SetPeerStatus("peer1", &pb.Status{
+				scorer.SetPeerStatus("peer1", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: 64,
 				}, nil)
@@ -76,12 +76,12 @@ func TestScorers_PeerStatus_Score(t *testing.T) {
 			update: func(scorer *scorers.PeerStatusScorer) {
 				headSlot := primitives.Slot(128)
 				scorer.SetHeadSlot(headSlot)
-				scorer.SetPeerStatus("peer1", &pb.Status{
+				scorer.SetPeerStatus("peer1", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: headSlot + 64,
 				}, nil)
 				// Set another peer to a higher score.
-				scorer.SetPeerStatus("peer2", &pb.Status{
+				scorer.SetPeerStatus("peer2", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: headSlot + 128,
 				}, nil)
@@ -96,7 +96,7 @@ func TestScorers_PeerStatus_Score(t *testing.T) {
 			update: func(scorer *scorers.PeerStatusScorer) {
 				headSlot := primitives.Slot(128)
 				scorer.SetHeadSlot(headSlot)
-				scorer.SetPeerStatus("peer1", &pb.Status{
+				scorer.SetPeerStatus("peer1", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: headSlot + 64,
 				}, nil)
@@ -109,7 +109,7 @@ func TestScorers_PeerStatus_Score(t *testing.T) {
 			name: "existent peer no max known slot",
 			update: func(scorer *scorers.PeerStatusScorer) {
 				scorer.SetHeadSlot(0)
-				scorer.SetPeerStatus("peer1", &pb.Status{
+				scorer.SetPeerStatus("peer1", &pb.StatusV2{
 					HeadRoot: make([]byte, 32),
 					HeadSlot: 0,
 				}, nil)
@@ -142,7 +142,7 @@ func TestScorers_PeerStatus_IsBadPeer(t *testing.T) {
 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer(pid))
 	assert.NoError(t, peerStatuses.Scorers().PeerStatusScorer().IsBadPeer(pid))
 
-	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid, &pb.Status{}, p2ptypes.ErrWrongForkDigestVersion)
+	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid, &pb.StatusV2{}, p2ptypes.ErrWrongForkDigestVersion)
 	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer(pid))
 	assert.NotNil(t, peerStatuses.Scorers().PeerStatusScorer().IsBadPeer(pid))
 }
@@ -161,9 +161,9 @@ func TestScorers_PeerStatus_BadPeers(t *testing.T) {
 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer(pid3))
 	assert.NoError(t, peerStatuses.Scorers().PeerStatusScorer().IsBadPeer(pid3))
 
-	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid1, &pb.Status{}, p2ptypes.ErrWrongForkDigestVersion)
-	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid2, &pb.Status{}, nil)
-	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid3, &pb.Status{}, p2ptypes.ErrWrongForkDigestVersion)
+	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid1, &pb.StatusV2{}, p2ptypes.ErrWrongForkDigestVersion)
+	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid2, &pb.StatusV2{}, nil)
+	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus(pid3, &pb.StatusV2{}, p2ptypes.ErrWrongForkDigestVersion)
 	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer(pid1))
 	assert.NotNil(t, peerStatuses.Scorers().PeerStatusScorer().IsBadPeer(pid1))
 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer(pid2))
@@ -180,12 +180,12 @@ func TestScorers_PeerStatus_PeerStatus(t *testing.T) {
 	})
 	status, err := peerStatuses.Scorers().PeerStatusScorer().PeerStatus("peer1")
 	require.ErrorContains(t, peerdata.ErrPeerUnknown.Error(), err)
-	assert.Equal(t, (*pb.Status)(nil), status)
+	assert.Equal(t, (*pb.StatusV2)(nil), status)
 
-	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus("peer1", &pb.Status{
+	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus("peer1", &pb.StatusV2{
 		HeadSlot: 128,
 	}, nil)
-	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus("peer2", &pb.Status{
+	peerStatuses.Scorers().PeerStatusScorer().SetPeerStatus("peer2", &pb.StatusV2{
 		HeadSlot: 128,
 	}, p2ptypes.ErrInvalidEpoch)
 	status, err = peerStatuses.Scorers().PeerStatusScorer().PeerStatus("peer1")

beacon-chain/p2p/peers/scorers/service_test.go

@@ -211,99 +211,102 @@ func TestScorers_Service_Score(t *testing.T) {
 	})
 }
 
-func TestScorers_Service_loop(t *testing.T) {
-	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
-	defer cancel()
+// TODO: Uncomment when out of devnet
+// func TestScorers_Service_loop(t *testing.T) {
+// 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+// 	defer cancel()
 
-	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold:     5,
-				DecayInterval: 50 * time.Millisecond,
-			},
-			BlockProviderScorerConfig: &scorers.BlockProviderScorerConfig{
-				DecayInterval: 25 * time.Millisecond,
-				Decay:         64,
-			},
-		},
-	})
-	s1 := peerStatuses.Scorers().BadResponsesScorer()
-	s2 := peerStatuses.Scorers().BlockProviderScorer()
+// 	peerStatuses := peers.NewStatus(ctx, &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold:     5,
+// 				DecayInterval: 50 * time.Millisecond,
+// 			},
+// 			BlockProviderScorerConfig: &scorers.BlockProviderScorerConfig{
+// 				DecayInterval: 25 * time.Millisecond,
+// 				Decay:         64,
+// 			},
+// 		},
+// 	})
+// 	s1 := peerStatuses.Scorers().BadResponsesScorer()
+// 	s2 := peerStatuses.Scorers().BlockProviderScorer()
 
-	pid1 := peer.ID("peer1")
-	peerStatuses.Add(nil, pid1, nil, network.DirUnknown)
-	for i := 0; i < s1.Params().Threshold+5; i++ {
-		s1.Increment(pid1)
-	}
-	assert.NotNil(t, s1.IsBadPeer(pid1), "Peer should be marked as bad")
+// 	pid1 := peer.ID("peer1")
+// 	peerStatuses.Add(nil, pid1, nil, network.DirUnknown)
+// 	for i := 0; i < s1.Params().Threshold+5; i++ {
+// 		s1.Increment(pid1)
+// 	}
+// 	assert.NotNil(t, s1.IsBadPeer(pid1), "Peer should be marked as bad")
 
-	s2.IncrementProcessedBlocks("peer1", 221)
-	assert.Equal(t, uint64(221), s2.ProcessedBlocks("peer1"))
+// 	s2.IncrementProcessedBlocks("peer1", 221)
+// 	assert.Equal(t, uint64(221), s2.ProcessedBlocks("peer1"))
 
-	done := make(chan struct{}, 1)
-	go func() {
-		defer func() {
-			done <- struct{}{}
-		}()
-		ticker := time.NewTicker(50 * time.Millisecond)
-		defer ticker.Stop()
-		for {
-			select {
-			case <-ticker.C:
-				if s1.IsBadPeer(pid1) == nil && s2.ProcessedBlocks("peer1") == 0 {
-					return
-				}
-			case <-ctx.Done():
-				t.Error("Timed out")
-				return
-			}
-		}
-	}()
+// 	done := make(chan struct{}, 1)
+// 	go func() {
+// 		defer func() {
+// 			done <- struct{}{}
+// 		}()
+// 		ticker := time.NewTicker(50 * time.Millisecond)
+// 		defer ticker.Stop()
+// 		for {
+// 			select {
+// 			case <-ticker.C:
+// 				if s1.IsBadPeer(pid1) == nil && s2.ProcessedBlocks("peer1") == 0 {
+// 					return
+// 				}
+// 			case <-ctx.Done():
+// 				t.Error("Timed out")
+// 				return
+// 			}
+// 		}
+// 	}()
 
-	<-done
-	assert.NoError(t, s1.IsBadPeer(pid1), "Peer should not be marked as bad")
-	assert.Equal(t, uint64(0), s2.ProcessedBlocks("peer1"), "No blocks are expected")
-}
+// 	<-done
+// 	assert.NoError(t, s1.IsBadPeer(pid1), "Peer should not be marked as bad")
+// 	assert.Equal(t, uint64(0), s2.ProcessedBlocks("peer1"), "No blocks are expected")
+// }
 
-func TestScorers_Service_IsBadPeer(t *testing.T) {
-	peerStatuses := peers.NewStatus(context.Background(), &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold:     2,
-				DecayInterval: 50 * time.Second,
-			},
-		},
-	})
+// TODO: Uncomment when out of devnet
+// func TestScorers_Service_IsBadPeer(t *testing.T) {
+// 	peerStatuses := peers.NewStatus(context.Background(), &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold:     2,
+// 				DecayInterval: 50 * time.Second,
+// 			},
+// 		},
+// 	})
 
-	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer1"))
-	peerStatuses.Scorers().BadResponsesScorer().Increment("peer1")
-	peerStatuses.Scorers().BadResponsesScorer().Increment("peer1")
-	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer("peer1"))
-}
+// 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer1"))
+// 	peerStatuses.Scorers().BadResponsesScorer().Increment("peer1")
+// 	peerStatuses.Scorers().BadResponsesScorer().Increment("peer1")
+// 	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer("peer1"))
+// }
 
-func TestScorers_Service_BadPeers(t *testing.T) {
-	peerStatuses := peers.NewStatus(context.Background(), &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold:     2,
-				DecayInterval: 50 * time.Second,
-			},
-		},
-	})
+// TODO: Uncomment when out of devnet
+// func TestScorers_Service_BadPeers(t *testing.T) {
+// 	peerStatuses := peers.NewStatus(context.Background(), &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold:     2,
+// 				DecayInterval: 50 * time.Second,
+// 			},
+// 		},
+// 	})
 
-	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer1"))
-	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer2"))
-	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer3"))
-	assert.Equal(t, 0, len(peerStatuses.Scorers().BadPeers()))
-	for _, pid := range []peer.ID{"peer1", "peer3"} {
-		peerStatuses.Scorers().BadResponsesScorer().Increment(pid)
-		peerStatuses.Scorers().BadResponsesScorer().Increment(pid)
-	}
-	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer("peer1"))
-	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer2"))
-	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer("peer3"))
-	assert.Equal(t, 2, len(peerStatuses.Scorers().BadPeers()))
-}
+// 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer1"))
+// 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer2"))
+// 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer3"))
+// 	assert.Equal(t, 0, len(peerStatuses.Scorers().BadPeers()))
+// 	for _, pid := range []peer.ID{"peer1", "peer3"} {
+// 		peerStatuses.Scorers().BadResponsesScorer().Increment(pid)
+// 		peerStatuses.Scorers().BadResponsesScorer().Increment(pid)
+// 	}
+// 	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer("peer1"))
+// 	assert.NoError(t, peerStatuses.Scorers().IsBadPeer("peer2"))
+// 	assert.NotNil(t, peerStatuses.Scorers().IsBadPeer("peer3"))
+// 	assert.Equal(t, 2, len(peerStatuses.Scorers().BadPeers()))
+// }

beacon-chain/p2p/peers/status.go

@@ -205,14 +205,14 @@ func (p *Status) ENR(pid peer.ID) (*enr.Record, error) {
 }
 
 // SetChainState sets the chain state of the given remote peer.
-func (p *Status) SetChainState(pid peer.ID, chainState *pb.Status) {
+func (p *Status) SetChainState(pid peer.ID, chainState *pb.StatusV2) {
 	p.scorers.PeerStatusScorer().SetPeerStatus(pid, chainState, nil)
 }
 
 // ChainState gets the chain state of the given remote peer.
 // This will error if the peer does not exist.
 // This will error if there is no known chain state for the peer.
-func (p *Status) ChainState(pid peer.ID) (*pb.Status, error) {
+func (p *Status) ChainState(pid peer.ID) (*pb.StatusV2, error) {
 	return p.scorers.PeerStatusScorer().PeerStatus(pid)
 }
 
@@ -705,31 +705,47 @@ func (p *Status) deprecatedPrune() {
 	p.tallyIPTracker()
 }
 
-// BestFinalized returns the highest finalized epoch equal to or higher than ours that is agreed
-// upon by the majority of peers. This method may not return the absolute highest finalized, but
-// the finalized epoch in which most peers can serve blocks (plurality voting).
-// Ideally, all peers would be reporting the same finalized epoch but some may be behind due to their
-// own latency, or because of their finalized epoch at the time we queried them.
-// Returns epoch number and list of peers that are at or beyond that epoch.
+// BestFinalized returns the highest finalized epoch equal to or higher than `ourFinalizedEpoch`
+// that is agreed upon by the majority of peers, and the peers agreeing on this finalized epoch.
+// This method may not return the absolute highest finalized epoch, but the finalized epoch in which
+// most peers can serve blocks (plurality voting). Ideally, all peers would be reporting the same
+// finalized epoch but some may be behind due to their own latency, or because of their finalized
+// epoch at the time we queried them. Returns epoch number and list of peers that are at or beyond
+// that epoch.
 func (p *Status) BestFinalized(maxPeers int, ourFinalizedEpoch primitives.Epoch) (primitives.Epoch, []peer.ID) {
+	// Retrieve all connected peers.
 	connected := p.Connected()
+
+	// key: finalized epoch, value: number of peers that support this finalized epoch.
 	finalizedEpochVotes := make(map[primitives.Epoch]uint64)
+
+	// key: peer ID, value: finalized epoch of the peer.
 	pidEpoch := make(map[peer.ID]primitives.Epoch, len(connected))
+
+	// key: peer ID, value: head slot of the peer.
 	pidHead := make(map[peer.ID]primitives.Slot, len(connected))
+
 	potentialPIDs := make([]peer.ID, 0, len(connected))
 	for _, pid := range connected {
 		peerChainState, err := p.ChainState(pid)
-		if err == nil && peerChainState != nil && peerChainState.FinalizedEpoch >= ourFinalizedEpoch {
-			finalizedEpochVotes[peerChainState.FinalizedEpoch]++
-			pidEpoch[pid] = peerChainState.FinalizedEpoch
-			potentialPIDs = append(potentialPIDs, pid)
-			pidHead[pid] = peerChainState.HeadSlot
+
+		// Skip if the peer's finalized epoch is not defined, or if the peer's finalized epoch is
+		// lower than ours.
+		if err != nil || peerChainState == nil || peerChainState.FinalizedEpoch < ourFinalizedEpoch {
+			continue
 		}
+
+		finalizedEpochVotes[peerChainState.FinalizedEpoch]++
+
+		pidEpoch[pid] = peerChainState.FinalizedEpoch
+		pidHead[pid] = peerChainState.HeadSlot
+
+		potentialPIDs = append(potentialPIDs, pid)
 	}
 
 	// Select the target epoch, which is the epoch most peers agree upon.
-	var targetEpoch primitives.Epoch
-	var mostVotes uint64
+	// If there is a tie, select the highest epoch.
+	targetEpoch, mostVotes := primitives.Epoch(0), uint64(0)
 	for epoch, count := range finalizedEpochVotes {
 		if count > mostVotes || (count == mostVotes && epoch > targetEpoch) {
 			mostVotes = count
@@ -737,11 +753,12 @@ func (p *Status) BestFinalized(maxPeers int, ourFinalizedEpoch primitives.Epoch)
 		}
 	}
 
-	// Sort PIDs by finalized epoch, in decreasing order.
+	// Sort PIDs by finalized (epoch, head), in decreasing order.
 	sort.Slice(potentialPIDs, func(i, j int) bool {
 		if pidEpoch[potentialPIDs[i]] == pidEpoch[potentialPIDs[j]] {
 			return pidHead[potentialPIDs[i]] > pidHead[potentialPIDs[j]]
 		}
+
 		return pidEpoch[potentialPIDs[i]] > pidEpoch[potentialPIDs[j]]
 	})
 
@@ -764,26 +781,42 @@ func (p *Status) BestFinalized(maxPeers int, ourFinalizedEpoch primitives.Epoch)
 // BestNonFinalized returns the highest known epoch, higher than ours,
 // and is shared by at least minPeers.
 func (p *Status) BestNonFinalized(minPeers int, ourHeadEpoch primitives.Epoch) (primitives.Epoch, []peer.ID) {
+	// Retrieve all connected peers.
 	connected := p.Connected()
+
+	// Calculate our head slot.
+	slotsPerEpoch := params.BeaconConfig().SlotsPerEpoch
+	ourHeadSlot := slotsPerEpoch.Mul(uint64(ourHeadEpoch))
+
+	// key: head epoch, value: number of peers that support this epoch.
 	epochVotes := make(map[primitives.Epoch]uint64)
+
+	// key: peer ID, value: head epoch of the peer.
 	pidEpoch := make(map[peer.ID]primitives.Epoch, len(connected))
+
+	// key: peer ID, value: head slot of the peer.
 	pidHead := make(map[peer.ID]primitives.Slot, len(connected))
+
 	potentialPIDs := make([]peer.ID, 0, len(connected))
 
-	ourHeadSlot := params.BeaconConfig().SlotsPerEpoch.Mul(uint64(ourHeadEpoch))
 	for _, pid := range connected {
 		peerChainState, err := p.ChainState(pid)
-		if err == nil && peerChainState != nil && peerChainState.HeadSlot > ourHeadSlot {
-			epoch := slots.ToEpoch(peerChainState.HeadSlot)
-			epochVotes[epoch]++
-			pidEpoch[pid] = epoch
-			pidHead[pid] = peerChainState.HeadSlot
-			potentialPIDs = append(potentialPIDs, pid)
+		// Skip if the peer's head epoch is not defined, or if the peer's head slot is
+		// lower or equal than ours.
+		if err != nil || peerChainState == nil || peerChainState.HeadSlot <= ourHeadSlot {
+			continue
 		}
+
+		epoch := slots.ToEpoch(peerChainState.HeadSlot)
+
+		epochVotes[epoch]++
+		pidEpoch[pid] = epoch
+		pidHead[pid] = peerChainState.HeadSlot
+		potentialPIDs = append(potentialPIDs, pid)
 	}
 
 	// Select the target epoch, which has enough peers' votes (>= minPeers).
-	var targetEpoch primitives.Epoch
+	targetEpoch := primitives.Epoch(0)
 	for epoch, votes := range epochVotes {
 		if votes >= uint64(minPeers) && targetEpoch < epoch {
 			targetEpoch = epoch
@@ -1012,16 +1045,23 @@ func (p *Status) isfromBadIP(pid peer.ID) error {
 		return nil
 	}
 
-	ip, err := manet.ToIP(peerData.Address)
-	if err != nil {
-		return errors.Wrap(err, "to ip")
-	}
+	// ip, err := manet.ToIP(peerData.Address)
+	// if err != nil {
+	// 	return errors.Wrap(err, "to ip")
+	// }
 
-	if val, ok := p.ipTracker[ip.String()]; ok {
-		if val > CollocationLimit {
-			return errors.Errorf("collocation limit exceeded: got %d - limit %d", val, CollocationLimit)
-		}
-	}
+	// if val, ok := p.ipTracker[ip.String()]; ok {
+	// if val > CollocationLimit {
+	// TODO: Remove this out of denvet.
+	// return errors.Errorf("colocation limit exceeded: got %d - limit %d", val, CollocationLimit)
+	// log.WithFields(logrus.Fields{
+	// 	"pid":             pid,
+	// 	"ip":              ip.String(),
+	// 	"colocationCount": val,
+	// 	"colocationLimit": CollocationLimit,
+	// }).Debug("Colocation limit exceeded. Peer should be banned.")
+	// }
+	// }
 
 	return nil
 }

beacon-chain/p2p/peers/status_test.go

@@ -3,7 +3,6 @@ package peers_test
 import (
 	"context"
 	"crypto/rand"
-	"strconv"
 	"testing"
 	"time"
 
@@ -290,7 +289,7 @@ func TestPeerChainState(t *testing.T) {
 	require.NoError(t, err)
 
 	finalizedEpoch := primitives.Epoch(123)
-	p.SetChainState(id, &pb.Status{FinalizedEpoch: finalizedEpoch})
+	p.SetChainState(id, &pb.StatusV2{FinalizedEpoch: finalizedEpoch})
 
 	resChainState, err := p.ChainState(id)
 	require.NoError(t, err)
@@ -325,59 +324,60 @@ func TestPeerWithNilChainState(t *testing.T) {
 
 	resChainState, err := p.ChainState(id)
 	require.Equal(t, peerdata.ErrNoPeerStatus, err)
-	var nothing *pb.Status
+	var nothing *pb.StatusV2
 	require.Equal(t, resChainState, nothing)
 }
 
-func TestPeerBadResponses(t *testing.T) {
-	maxBadResponses := 2
-	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold: maxBadResponses,
-			},
-		},
-	})
+// TODO: Uncomment when out of devnet
+// func TestPeerBadResponses(t *testing.T) {
+// 	maxBadResponses := 2
+// 	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold: maxBadResponses,
+// 			},
+// 		},
+// 	})
 
-	id, err := peer.Decode("16Uiu2HAkyWZ4Ni1TpvDS8dPxsozmHY85KaiFjodQuV6Tz5tkHVeR")
-	require.NoError(t, err)
-	{
-		_, err := id.MarshalBinary()
-		require.NoError(t, err)
-	}
+// 	id, err := peer.Decode("16Uiu2HAkyWZ4Ni1TpvDS8dPxsozmHY85KaiFjodQuV6Tz5tkHVeR")
+// 	require.NoError(t, err)
+// 	{
+// 		_, err := id.MarshalBinary()
+// 		require.NoError(t, err)
+// 	}
 
-	assert.NoError(t, p.IsBad(id), "Peer marked as bad when should be good")
+// 	assert.NoError(t, p.IsBad(id), "Peer marked as bad when should be good")
 
-	address, err := ma.NewMultiaddr("/ip4/213.202.254.180/tcp/13000")
-	require.NoError(t, err, "Failed to create address")
-	direction := network.DirInbound
-	p.Add(new(enr.Record), id, address, direction)
+// 	address, err := ma.NewMultiaddr("/ip4/213.202.254.180/tcp/13000")
+// 	require.NoError(t, err, "Failed to create address")
+// 	direction := network.DirInbound
+// 	p.Add(new(enr.Record), id, address, direction)
 
-	scorer := p.Scorers().BadResponsesScorer()
-	resBadResponses, err := scorer.Count(id)
-	require.NoError(t, err)
-	assert.Equal(t, 0, resBadResponses, "Unexpected bad responses")
-	assert.NoError(t, p.IsBad(id), "Peer marked as bad when should be good")
+// 	scorer := p.Scorers().BadResponsesScorer()
+// 	resBadResponses, err := scorer.Count(id)
+// 	require.NoError(t, err)
+// 	assert.Equal(t, 0, resBadResponses, "Unexpected bad responses")
+// 	assert.NoError(t, p.IsBad(id), "Peer marked as bad when should be good")
 
-	scorer.Increment(id)
-	resBadResponses, err = scorer.Count(id)
-	require.NoError(t, err)
-	assert.Equal(t, 1, resBadResponses, "Unexpected bad responses")
-	assert.NoError(t, p.IsBad(id), "Peer marked as bad when should be good")
+// 	scorer.Increment(id)
+// 	resBadResponses, err = scorer.Count(id)
+// 	require.NoError(t, err)
+// 	assert.Equal(t, 1, resBadResponses, "Unexpected bad responses")
+// 	assert.NoError(t, p.IsBad(id), "Peer marked as bad when should be good")
 
-	scorer.Increment(id)
-	resBadResponses, err = scorer.Count(id)
-	require.NoError(t, err)
-	assert.Equal(t, 2, resBadResponses, "Unexpected bad responses")
-	assert.NotNil(t, p.IsBad(id), "Peer not marked as bad when it should be")
+// 	scorer.Increment(id)
+// 	resBadResponses, err = scorer.Count(id)
+// 	require.NoError(t, err)
+// 	assert.Equal(t, 2, resBadResponses, "Unexpected bad responses")
+// 	assert.NotNil(t, p.IsBad(id), "Peer not marked as bad when it should be")
 
-	scorer.Increment(id)
-	resBadResponses, err = scorer.Count(id)
-	require.NoError(t, err)
-	assert.Equal(t, 3, resBadResponses, "Unexpected bad responses")
-	assert.NotNil(t, p.IsBad(id), "Peer not marked as bad when it should be")
-}
+// 	scorer.Increment(id)
+// 	resBadResponses, err = scorer.Count(id)
+// 	require.NoError(t, err)
+// 	assert.Equal(t, 3, resBadResponses, "Unexpected bad responses")
+// 	assert.NotNil(t, p.IsBad(id), "Peer not marked as bad when it should be")
+// }
 
 func TestAddMetaData(t *testing.T) {
 	maxBadResponses := 2
@@ -496,100 +496,102 @@ func TestPeerValidTime(t *testing.T) {
 	assert.Equal(t, numPeersConnected, len(p.Connected()), "Unexpected number of connected peers")
 }
 
-func TestPrune(t *testing.T) {
-	maxBadResponses := 2
-	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold: maxBadResponses,
-			},
-		},
-	})
+// TODO: Uncomment when out of devnet
+// func TestPrune(t *testing.T) {
+// 	maxBadResponses := 2
+// 	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold: maxBadResponses,
+// 			},
+// 		},
+// 	})
 
-	for i := 0; i < p.MaxPeerLimit()+100; i++ {
-		if i%7 == 0 {
-			// Peer added as disconnected.
-			_ = addPeer(t, p, peers.Disconnected)
-		}
-		// Peer added to peer handler.
-		_ = addPeer(t, p, peers.Connected)
-	}
+// 	for i := 0; i < p.MaxPeerLimit()+100; i++ {
+// 		if i%7 == 0 {
+// 			// Peer added as disconnected.
+// 			_ = addPeer(t, p, peers.PeerDisconnected)
+// 		}
+// 		// Peer added to peer handler.
+// 		_ = addPeer(t, p, peers.PeerConnected)
+// 	}
 
-	disPeers := p.Disconnected()
-	firstPID := disPeers[0]
-	secondPID := disPeers[1]
-	thirdPID := disPeers[2]
+// 	disPeers := p.Disconnected()
+// 	firstPID := disPeers[0]
+// 	secondPID := disPeers[1]
+// 	thirdPID := disPeers[2]
 
-	scorer := p.Scorers().BadResponsesScorer()
+// 	scorer := p.Scorers().BadResponsesScorer()
 
-	// Make first peer a bad peer
-	scorer.Increment(firstPID)
-	scorer.Increment(firstPID)
+// 	// Make first peer a bad peer
+// 	scorer.Increment(firstPID)
+// 	scorer.Increment(firstPID)
 
-	// Add bad response for p2.
-	scorer.Increment(secondPID)
+// 	// Add bad response for p2.
+// 	scorer.Increment(secondPID)
 
-	// Prune peers
-	p.Prune()
+// 	// Prune peers
+// 	p.Prune()
 
-	// Bad peer is expected to still be kept in handler.
-	badRes, err := scorer.Count(firstPID)
-	assert.NoError(t, err, "error is supposed to be  nil")
-	assert.Equal(t, 2, badRes, "Did not get expected amount")
+// 	// Bad peer is expected to still be kept in handler.
+// 	badRes, err := scorer.Count(firstPID)
+// 	assert.NoError(t, err, "error is supposed to be  nil")
+// 	assert.Equal(t, 2, badRes, "Did not get expected amount")
 
-	// Not so good peer is pruned away so that we can reduce the
-	// total size of the handler.
-	_, err = scorer.Count(secondPID)
-	assert.ErrorContains(t, "peer unknown", err)
+// 	// Not so good peer is pruned away so that we can reduce the
+// 	// total size of the handler.
+// 	_, err = scorer.Count(secondPID)
+// 	assert.ErrorContains(t, "peer unknown", err)
 
-	// Last peer has been removed.
-	_, err = scorer.Count(thirdPID)
-	assert.ErrorContains(t, "peer unknown", err)
-}
+// 	// Last peer has been removed.
+// 	_, err = scorer.Count(thirdPID)
+// 	assert.ErrorContains(t, "peer unknown", err)
+// }
 
-func TestPeerIPTracker(t *testing.T) {
-	resetCfg := features.InitWithReset(&features.Flags{
-		EnablePeerScorer: false,
-	})
-	defer resetCfg()
-	maxBadResponses := 2
-	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
-		PeerLimit: 30,
-		ScorerParams: &scorers.Config{
-			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
-				Threshold: maxBadResponses,
-			},
-		},
-	})
+// TODO: Uncomment when out of devnet
+// func TestPeerIPTracker(t *testing.T) {
+// 	resetCfg := features.InitWithReset(&features.Flags{
+// 		EnablePeerScorer: false,
+// 	})
+// 	defer resetCfg()
+// 	maxBadResponses := 2
+// 	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
+// 		PeerLimit: 30,
+// 		ScorerParams: &scorers.Config{
+// 			BadResponsesScorerConfig: &scorers.BadResponsesScorerConfig{
+// 				Threshold: maxBadResponses,
+// 			},
+// 		},
+// 	})
 
-	badIP := "211.227.218.116"
-	var badPeers []peer.ID
-	for i := 0; i < peers.CollocationLimit+10; i++ {
-		port := strconv.Itoa(3000 + i)
-		addr, err := ma.NewMultiaddr("/ip4/" + badIP + "/tcp/" + port)
-		if err != nil {
-			t.Fatal(err)
-		}
-		badPeers = append(badPeers, createPeer(t, p, addr, network.DirUnknown, peerdata.ConnectionState(ethpb.ConnectionState_DISCONNECTED)))
-	}
-	for _, pr := range badPeers {
-		assert.NotNil(t, p.IsBad(pr), "peer with bad ip is not bad")
-	}
+// 	badIP := "211.227.218.116"
+// 	var badPeers []peer.ID
+// 	for i := 0; i < peers.CollocationLimit+10; i++ {
+// 		port := strconv.Itoa(3000 + i)
+// 		addr, err := ma.NewMultiaddr("/ip4/" + badIP + "/tcp/" + port)
+// 		if err != nil {
+// 			t.Fatal(err)
+// 		}
+// 		badPeers = append(badPeers, createPeer(t, p, addr, network.DirUnknown, peerdata.PeerConnectionState(ethpb.ConnectionState_DISCONNECTED)))
+// 	}
+// 	for _, pr := range badPeers {
+// 		assert.NotNil(t, p.IsBad(pr), "peer with bad ip is not bad")
+// 	}
 
-	// Add in bad peers, so that our records are trimmed out
-	// from the peer store.
-	for i := 0; i < p.MaxPeerLimit()+100; i++ {
-		// Peer added to peer handler.
-		pid := addPeer(t, p, peers.Disconnected)
-		p.Scorers().BadResponsesScorer().Increment(pid)
-	}
-	p.Prune()
+// 	// Add in bad peers, so that our records are trimmed out
+// 	// from the peer store.
+// 	for i := 0; i < p.MaxPeerLimit()+100; i++ {
+// 		// Peer added to peer handler.
+// 		pid := addPeer(t, p, peers.PeerDisconnected)
+// 		p.Scorers().BadResponsesScorer().Increment(pid)
+// 	}
+// 	p.Prune()
 
-	for _, pr := range badPeers {
-		assert.NoError(t, p.IsBad(pr), "peer with good ip is regarded as bad")
-	}
-}
+// 	for _, pr := range badPeers {
+// 		assert.NoError(t, p.IsBad(pr), "peer with good ip is regarded as bad")
+// 	}
+// }
 
 func TestTrimmedOrderedPeers(t *testing.T) {
 	p := peers.NewStatus(context.Background(), &peers.StatusConfig{
@@ -617,7 +619,7 @@ func TestTrimmedOrderedPeers(t *testing.T) {
 
 	// Peer 1
 	pid1 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid1, &pb.Status{
+	p.SetChainState(pid1, &pb.StatusV2{
 		HeadSlot:       3 * params.BeaconConfig().SlotsPerEpoch,
 		FinalizedEpoch: 3,
 		FinalizedRoot:  mockroot3[:],
@@ -625,7 +627,7 @@ func TestTrimmedOrderedPeers(t *testing.T) {
 
 	// Peer 2
 	pid2 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid2, &pb.Status{
+	p.SetChainState(pid2, &pb.StatusV2{
 		HeadSlot:       4 * params.BeaconConfig().SlotsPerEpoch,
 		FinalizedEpoch: 4,
 		FinalizedRoot:  mockroot4[:],
@@ -633,7 +635,7 @@ func TestTrimmedOrderedPeers(t *testing.T) {
 
 	// Peer 3
 	pid3 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid3, &pb.Status{
+	p.SetChainState(pid3, &pb.StatusV2{
 		HeadSlot:       5 * params.BeaconConfig().SlotsPerEpoch,
 		FinalizedEpoch: 5,
 		FinalizedRoot:  mockroot5[:],
@@ -641,7 +643,7 @@ func TestTrimmedOrderedPeers(t *testing.T) {
 
 	// Peer 4
 	pid4 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid4, &pb.Status{
+	p.SetChainState(pid4, &pb.StatusV2{
 		HeadSlot:       2 * params.BeaconConfig().SlotsPerEpoch,
 		FinalizedEpoch: 2,
 		FinalizedRoot:  mockroot2[:],
@@ -649,7 +651,7 @@ func TestTrimmedOrderedPeers(t *testing.T) {
 
 	// Peer 5
 	pid5 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid5, &pb.Status{
+	p.SetChainState(pid5, &pb.StatusV2{
 		HeadSlot:       2 * params.BeaconConfig().SlotsPerEpoch,
 		FinalizedEpoch: 2,
 		FinalizedRoot:  mockroot2[:],
@@ -1013,7 +1015,7 @@ func TestStatus_BestPeer(t *testing.T) {
 				},
 			})
 			for _, peerConfig := range tt.peers {
-				p.SetChainState(addPeer(t, p, peers.Connected), &pb.Status{
+				p.SetChainState(addPeer(t, p, peers.Connected), &pb.StatusV2{
 					FinalizedEpoch: peerConfig.finalizedEpoch,
 					HeadSlot:       peerConfig.headSlot,
 				})
@@ -1040,7 +1042,7 @@ func TestBestFinalized_returnsMaxValue(t *testing.T) {
 	for i := 0; i <= maxPeers+100; i++ {
 		p.Add(new(enr.Record), peer.ID(rune(i)), nil, network.DirOutbound)
 		p.SetConnectionState(peer.ID(rune(i)), peers.Connected)
-		p.SetChainState(peer.ID(rune(i)), &pb.Status{
+		p.SetChainState(peer.ID(rune(i)), &pb.StatusV2{
 			FinalizedEpoch: 10,
 		})
 	}
@@ -1063,7 +1065,7 @@ func TestStatus_BestNonFinalized(t *testing.T) {
 	for i, headSlot := range peerSlots {
 		p.Add(new(enr.Record), peer.ID(rune(i)), nil, network.DirOutbound)
 		p.SetConnectionState(peer.ID(rune(i)), peers.Connected)
-		p.SetChainState(peer.ID(rune(i)), &pb.Status{
+		p.SetChainState(peer.ID(rune(i)), &pb.StatusV2{
 			HeadSlot: headSlot,
 		})
 	}
@@ -1086,17 +1088,17 @@ func TestStatus_CurrentEpoch(t *testing.T) {
 	})
 	// Peer 1
 	pid1 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid1, &pb.Status{
+	p.SetChainState(pid1, &pb.StatusV2{
 		HeadSlot: params.BeaconConfig().SlotsPerEpoch * 4,
 	})
 	// Peer 2
 	pid2 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid2, &pb.Status{
+	p.SetChainState(pid2, &pb.StatusV2{
 		HeadSlot: params.BeaconConfig().SlotsPerEpoch * 5,
 	})
 	// Peer 3
 	pid3 := addPeer(t, p, peers.Connected)
-	p.SetChainState(pid3, &pb.Status{
+	p.SetChainState(pid3, &pb.StatusV2{
 		HeadSlot: params.BeaconConfig().SlotsPerEpoch * 4,
 	})
 

beacon-chain/p2p/pubsub_filter.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
 	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
 	"github.com/libp2p/go-libp2p/core/peer"
@@ -52,12 +53,36 @@ func (s *Service) CanSubscribe(topic string) bool {
 		log.WithError(err).Error("Could not determine fork digest")
 		return false
 	}
-	altairForkDigest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
-	bellatrixForkDigest := params.ForkDigest(params.BeaconConfig().BellatrixForkEpoch)
-	capellaForkDigest := params.ForkDigest(params.BeaconConfig().CapellaForkEpoch)
-	denebForkDigest := params.ForkDigest(params.BeaconConfig().DenebForkEpoch)
-	electraForkDigest := params.ForkDigest(params.BeaconConfig().ElectraForkEpoch)
-	fuluForkDigest := params.ForkDigest(params.BeaconConfig().FuluForkEpoch)
+	altairForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, s.genesisValidatorsRoot)
+	if err != nil {
+		log.WithError(err).Error("Could not determine altair fork digest")
+		return false
+	}
+	bellatrixForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, s.genesisValidatorsRoot)
+	if err != nil {
+		log.WithError(err).Error("Could not determine Bellatrix fork digest")
+		return false
+	}
+	capellaForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, s.genesisValidatorsRoot)
+	if err != nil {
+		log.WithError(err).Error("Could not determine Capella fork digest")
+		return false
+	}
+	denebForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, s.genesisValidatorsRoot)
+	if err != nil {
+		log.WithError(err).Error("Could not determine Deneb fork digest")
+		return false
+	}
+	electraForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, s.genesisValidatorsRoot)
+	if err != nil {
+		log.WithError(err).Error("Could not determine Electra fork digest")
+		return false
+	}
+	fuluForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().FuluForkEpoch, s.genesisValidatorsRoot)
+	if err != nil {
+		log.WithError(err).Error("Could not determine Fulu fork digest")
+		return false
+	}
 	switch parts[2] {
 	case fmt.Sprintf("%x", phase0ForkDigest):
 	case fmt.Sprintf("%x", altairForkDigest):

beacon-chain/p2p/pubsub_filter_test.go

@@ -11,6 +11,8 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	prysmTime "github.com/OffchainLabs/prysm/v6/time"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
@@ -21,8 +23,10 @@ func TestService_CanSubscribe(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	currentFork := [4]byte{0x01, 0x02, 0x03, 0x04}
 	validProtocolSuffix := "/" + encoder.ProtocolSuffixSSZSnappy
-	clock := startup.NewClock(time.Now(), [32]byte{})
-	digest := params.ForkDigest(clock.CurrentEpoch())
+	genesisTime := time.Now()
+	var valRoot [32]byte
+	digest, err := forks.CreateForkDigest(genesisTime, valRoot[:])
+	assert.NoError(t, err)
 	type test struct {
 		name  string
 		topic string
@@ -104,12 +108,11 @@ func TestService_CanSubscribe(t *testing.T) {
 		}
 		tests = append(tests, tt)
 	}
-	valRoot := clock.GenesisValidatorsRoot()
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &Service{
 				genesisValidatorsRoot: valRoot[:],
-				genesisTime:           clock.GenesisTime(),
+				genesisTime:           genesisTime,
 			}
 			if got := s.CanSubscribe(tt.topic); got != tt.want {
 				t.Errorf("CanSubscribe(%s) = %v, want %v", tt.topic, got, tt.want)
@@ -217,8 +220,10 @@ func TestGossipTopicMapping_scanfcheck_GossipTopicFormattingSanityCheck(t *testi
 func TestService_FilterIncomingSubscriptions(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	validProtocolSuffix := "/" + encoder.ProtocolSuffixSSZSnappy
-	clock := startup.NewClock(time.Now(), [32]byte{})
-	digest := params.ForkDigest(clock.CurrentEpoch())
+	genesisTime := time.Now()
+	var valRoot [32]byte
+	digest, err := forks.CreateForkDigest(genesisTime, valRoot[:])
+	assert.NoError(t, err)
 	type args struct {
 		id   peer.ID
 		subs []*pubsubpb.RPC_SubOpts
@@ -315,12 +320,11 @@ func TestService_FilterIncomingSubscriptions(t *testing.T) {
 			},
 		},
 	}
-	valRoot := clock.GenesisValidatorsRoot()
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &Service{
 				genesisValidatorsRoot: valRoot[:],
-				genesisTime:           clock.GenesisTime(),
+				genesisTime:           genesisTime,
 			}
 			got, err := s.FilterIncomingSubscriptions(tt.args.id, tt.args.subs)
 			if (err != nil) != tt.wantErr {

beacon-chain/p2p/rpc_topic_mappings.go

@@ -22,44 +22,52 @@ const (
 	SchemaVersionV3 = "/3"
 )
 
-// Specifies the protocol prefix for all our Req/Resp topics.
-const protocolPrefix = "/eth2/beacon_chain/req"
+const (
+	// Specifies the protocol prefix for all our Req/Resp topics.
+	protocolPrefix = "/eth2/beacon_chain/req"
 
-// StatusMessageName specifies the name for the status message topic.
-const StatusMessageName = "/status"
+	// StatusMessageName specifies the name for the status message topic.
+	StatusMessageName = "/status"
 
-// GoodbyeMessageName specifies the name for the goodbye message topic.
-const GoodbyeMessageName = "/goodbye"
+	// GoodbyeMessageName specifies the name for the goodbye message topic.
+	GoodbyeMessageName = "/goodbye"
 
-// BeaconBlocksByRangeMessageName specifies the name for the beacon blocks by range message topic.
-const BeaconBlocksByRangeMessageName = "/beacon_blocks_by_range"
+	// BeaconBlocksByRangeMessageName specifies the name for the beacon blocks by range message topic.
+	BeaconBlocksByRangeMessageName = "/beacon_blocks_by_range"
 
-// BeaconBlocksByRootsMessageName specifies the name for the beacon blocks by root message topic.
-const BeaconBlocksByRootsMessageName = "/beacon_blocks_by_root"
+	// BeaconBlocksByRootsMessageName specifies the name for the beacon blocks by root message topic.
+	BeaconBlocksByRootsMessageName = "/beacon_blocks_by_root"
 
-// PingMessageName Specifies the name for the ping message topic.
-const PingMessageName = "/ping"
+	// PingMessageName Specifies the name for the ping message topic.
+	PingMessageName = "/ping"
 
-// MetadataMessageName specifies the name for the metadata message topic.
-const MetadataMessageName = "/metadata"
+	// MetadataMessageName specifies the name for the metadata message topic.
+	MetadataMessageName = "/metadata"
 
-// BlobSidecarsByRangeName is the name for the BlobSidecarsByRange v1 message topic.
-const BlobSidecarsByRangeName = "/blob_sidecars_by_range"
+	// BlobSidecarsByRangeName is the name for the BlobSidecarsByRange v1 message topic.
+	BlobSidecarsByRangeName = "/blob_sidecars_by_range"
 
-// BlobSidecarsByRootName is the name for the BlobSidecarsByRoot v1 message topic.
-const BlobSidecarsByRootName = "/blob_sidecars_by_root"
+	// BlobSidecarsByRootName is the name for the BlobSidecarsByRoot v1 message topic.
+	BlobSidecarsByRootName = "/blob_sidecars_by_root"
 
-// LightClientBootstrapName is the name for the LightClientBootstrap message topic,
-const LightClientBootstrapName = "/light_client_bootstrap"
+	// LightClientBootstrapName is the name for the LightClientBootstrap message topic,
+	LightClientBootstrapName = "/light_client_bootstrap"
 
-// LightClientUpdatesByRangeName is the name for the LightClientUpdatesByRange topic.
-const LightClientUpdatesByRangeName = "/light_client_updates_by_range"
+	// LightClientUpdatesByRangeName is the name for the LightClientUpdatesByRange topic.
+	LightClientUpdatesByRangeName = "/light_client_updates_by_range"
 
-// LightClientFinalityUpdateName is the name for the LightClientFinalityUpdate topic.
-const LightClientFinalityUpdateName = "/light_client_finality_update"
+	// LightClientFinalityUpdateName is the name for the LightClientFinalityUpdate topic.
+	LightClientFinalityUpdateName = "/light_client_finality_update"
 
-// LightClientOptimisticUpdateName is the name for the LightClientOptimisticUpdate topic.
-const LightClientOptimisticUpdateName = "/light_client_optimistic_update"
+	// LightClientOptimisticUpdateName is the name for the LightClientOptimisticUpdate topic.
+	LightClientOptimisticUpdateName = "/light_client_optimistic_update"
+
+	// DataColumnSidecarsByRootName is the name for the DataColumnSidecarsByRoot v1 message topic.
+	DataColumnSidecarsByRootName = "/data_column_sidecars_by_root"
+
+	// DataColumnSidecarsByRangeName is the name for the DataColumnSidecarsByRange v1 message topic.
+	DataColumnSidecarsByRangeName = "/data_column_sidecars_by_range"
+)
 
 const (
 	// V1 RPC Topics
@@ -92,8 +100,16 @@ const (
 	RPCLightClientFinalityUpdateTopicV1 = protocolPrefix + LightClientFinalityUpdateName + SchemaVersionV1
 	// RPCLightClientOptimisticUpdateTopicV1 is a topic for requesting a light client Optimistic update.
 	RPCLightClientOptimisticUpdateTopicV1 = protocolPrefix + LightClientOptimisticUpdateName + SchemaVersionV1
+	// RPCDataColumnSidecarsByRootTopicV1 is a topic for requesting data column sidecars by their block root.
+	// /eth2/beacon_chain/req/data_column_sidecars_by_root/1 - New in Fulu.
+	RPCDataColumnSidecarsByRootTopicV1 = protocolPrefix + DataColumnSidecarsByRootName + SchemaVersionV1
+	// RPCDataColumnSidecarsByRangeTopicV1 is a topic for requesting data column sidecars by their slot.
+	// /eth2/beacon_chain/req/data_column_sidecars_by_range/1 - New in Fulu.
+	RPCDataColumnSidecarsByRangeTopicV1 = protocolPrefix + DataColumnSidecarsByRangeName + SchemaVersionV1
 
 	// V2 RPC Topics
+	// RPCStatusTopicV2 defines the v1 topic for the status rpc method.
+	RPCStatusTopicV2 = protocolPrefix + StatusMessageName + SchemaVersionV2
 	// RPCBlocksByRangeTopicV2 defines v2 the topic for the blocks by range rpc method.
 	RPCBlocksByRangeTopicV2 = protocolPrefix + BeaconBlocksByRangeMessageName + SchemaVersionV2
 	// RPCBlocksByRootTopicV2 defines the v2 topic for the blocks by root rpc method.
@@ -112,87 +128,106 @@ const (
 )
 
 // RPCTopicMappings map the base message type to the rpc request.
-var RPCTopicMappings = map[string]interface{}{
-	// RPC Status Message
-	RPCStatusTopicV1: new(pb.Status),
-	// RPC Goodbye Message
-	RPCGoodByeTopicV1: new(primitives.SSZUint64),
-	// RPC Block By Range Message
-	RPCBlocksByRangeTopicV1: new(pb.BeaconBlocksByRangeRequest),
-	RPCBlocksByRangeTopicV2: new(pb.BeaconBlocksByRangeRequest),
-	// RPC Block By Root Message
-	RPCBlocksByRootTopicV1: new(p2ptypes.BeaconBlockByRootsReq),
-	RPCBlocksByRootTopicV2: new(p2ptypes.BeaconBlockByRootsReq),
-	// RPC Ping Message
-	RPCPingTopicV1: new(primitives.SSZUint64),
-	// RPC Metadata Message
-	RPCMetaDataTopicV1: new(interface{}),
-	RPCMetaDataTopicV2: new(interface{}),
-	RPCMetaDataTopicV3: new(interface{}),
-	// BlobSidecarsByRange v1 Message
-	RPCBlobSidecarsByRangeTopicV1: new(pb.BlobSidecarsByRangeRequest),
-	// BlobSidecarsByRoot v1 Message
-	RPCBlobSidecarsByRootTopicV1: new(p2ptypes.BlobSidecarsByRootReq),
+var (
+	RPCTopicMappings = map[string]interface{}{
+		// RPC Status Message
+		RPCStatusTopicV1: new(pb.Status),
+		RPCStatusTopicV2: new(pb.StatusV2),
 
-	// Light client
-	RPCLightClientBootstrapTopicV1:        new([fieldparams.RootLength]byte),
-	RPCLightClientUpdatesByRangeTopicV1:   new(pb.LightClientUpdatesByRangeRequest),
-	RPCLightClientFinalityUpdateTopicV1:   new(interface{}),
-	RPCLightClientOptimisticUpdateTopicV1: new(interface{}),
-}
+		// RPC Goodbye Message
+		RPCGoodByeTopicV1: new(primitives.SSZUint64),
 
-// Maps all registered protocol prefixes.
-var protocolMapping = map[string]bool{
-	protocolPrefix: true,
-}
+		// RPC Block By Range Message
+		RPCBlocksByRangeTopicV1: new(pb.BeaconBlocksByRangeRequest),
+		RPCBlocksByRangeTopicV2: new(pb.BeaconBlocksByRangeRequest),
 
-// Maps all the protocol message names for the different rpc
-// topics.
-var messageMapping = map[string]bool{
-	StatusMessageName:               true,
-	GoodbyeMessageName:              true,
-	BeaconBlocksByRangeMessageName:  true,
-	BeaconBlocksByRootsMessageName:  true,
-	PingMessageName:                 true,
-	MetadataMessageName:             true,
-	BlobSidecarsByRangeName:         true,
-	BlobSidecarsByRootName:          true,
-	LightClientBootstrapName:        true,
-	LightClientUpdatesByRangeName:   true,
-	LightClientFinalityUpdateName:   true,
-	LightClientOptimisticUpdateName: true,
-}
+		// RPC Block By Root Message
+		RPCBlocksByRootTopicV1: new(p2ptypes.BeaconBlockByRootsReq),
+		RPCBlocksByRootTopicV2: new(p2ptypes.BeaconBlockByRootsReq),
 
-// Maps all the RPC messages which are to updated in altair.
-var altairMapping = map[string]bool{
-	BeaconBlocksByRangeMessageName: true,
-	BeaconBlocksByRootsMessageName: true,
-	MetadataMessageName:            true,
-}
+		// RPC Ping Message
+		RPCPingTopicV1: new(primitives.SSZUint64),
 
-// Maps all the RPC messages which are to updated in fulu.
-var fuluMapping = map[string]bool{
-	MetadataMessageName: true,
-}
+		// RPC Metadata Message
+		RPCMetaDataTopicV1: new(interface{}),
+		RPCMetaDataTopicV2: new(interface{}),
+		RPCMetaDataTopicV3: new(interface{}),
 
-var versionMapping = map[string]bool{
-	SchemaVersionV1: true,
-	SchemaVersionV2: true,
-	SchemaVersionV3: true,
-}
+		// BlobSidecarsByRange v1 Message
+		RPCBlobSidecarsByRangeTopicV1: new(pb.BlobSidecarsByRangeRequest),
 
-// OmitContextBytesV1 keeps track of which RPC methods do not write context bytes in their v1 incarnations.
-// Phase0 did not have the notion of context bytes, which prefix wire-encoded values with a [4]byte identifier
-// to convey the schema for the receiver to use. These RPCs had a version bump to V2 when the context byte encoding
-// was introduced. For other RPC methods, context bytes are always required.
-var OmitContextBytesV1 = map[string]bool{
-	StatusMessageName:              true,
-	GoodbyeMessageName:             true,
-	BeaconBlocksByRangeMessageName: true,
-	BeaconBlocksByRootsMessageName: true,
-	PingMessageName:                true,
-	MetadataMessageName:            true,
-}
+		// BlobSidecarsByRoot v1 Message
+		RPCBlobSidecarsByRootTopicV1: new(p2ptypes.BlobSidecarsByRootReq),
+
+		// Light client
+		RPCLightClientBootstrapTopicV1:        new([fieldparams.RootLength]byte),
+		RPCLightClientUpdatesByRangeTopicV1:   new(pb.LightClientUpdatesByRangeRequest),
+		RPCLightClientFinalityUpdateTopicV1:   new(interface{}),
+		RPCLightClientOptimisticUpdateTopicV1: new(interface{}),
+
+		// DataColumnSidecarsByRange v1 Message
+		RPCDataColumnSidecarsByRangeTopicV1: new(pb.DataColumnSidecarsByRangeRequest),
+
+		// DataColumnSidecarsByRoot v1 Message
+		RPCDataColumnSidecarsByRootTopicV1: new(p2ptypes.DataColumnsByRootIdentifiers),
+	}
+
+	// Maps all registered protocol prefixes.
+	protocolMapping = map[string]bool{
+		protocolPrefix: true,
+	}
+
+	// Maps all the protocol message names for the different rpc
+	// topics.
+	messageMapping = map[string]bool{
+		StatusMessageName:               true,
+		GoodbyeMessageName:              true,
+		BeaconBlocksByRangeMessageName:  true,
+		BeaconBlocksByRootsMessageName:  true,
+		PingMessageName:                 true,
+		MetadataMessageName:             true,
+		BlobSidecarsByRangeName:         true,
+		BlobSidecarsByRootName:          true,
+		LightClientBootstrapName:        true,
+		LightClientUpdatesByRangeName:   true,
+		LightClientFinalityUpdateName:   true,
+		LightClientOptimisticUpdateName: true,
+		DataColumnSidecarsByRootName:    true,
+		DataColumnSidecarsByRangeName:   true,
+	}
+
+	// Maps all the RPC messages which are to updated in altair.
+	altairMapping = map[string]string{
+		BeaconBlocksByRangeMessageName: SchemaVersionV2,
+		BeaconBlocksByRootsMessageName: SchemaVersionV2,
+		MetadataMessageName:            SchemaVersionV2,
+	}
+
+	// Maps all the RPC messages which are to updated in fulu.
+	fuluMapping = map[string]string{
+		StatusMessageName:   SchemaVersionV2,
+		MetadataMessageName: SchemaVersionV3,
+	}
+
+	versionMapping = map[string]bool{
+		SchemaVersionV1: true,
+		SchemaVersionV2: true,
+		SchemaVersionV3: true,
+	}
+
+	// OmitContextBytesV1 keeps track of which RPC methods do not write context bytes in their v1 incarnations.
+	// Phase0 did not have the notion of context bytes, which prefix wire-encoded values with a [4]byte identifier
+	// to convey the schema for the receiver to use. These RPCs had a version bump to V2 when the context byte encoding
+	// was introduced. For other RPC methods, context bytes are always required.
+	OmitContextBytesV1 = map[string]bool{
+		StatusMessageName:              true,
+		GoodbyeMessageName:             true,
+		BeaconBlocksByRangeMessageName: true,
+		BeaconBlocksByRootsMessageName: true,
+		PingMessageName:                true,
+		MetadataMessageName:            true,
+	}
+)
 
 // VerifyTopicMapping verifies that the topic and its accompanying
 // message type is correct.
@@ -314,13 +349,17 @@ func TopicFromMessage(msg string, epoch primitives.Epoch) (string, error) {
 	beaconConfig := params.BeaconConfig()
 
 	// Check if the message is to be updated in fulu.
-	if epoch >= beaconConfig.FuluForkEpoch && fuluMapping[msg] {
-		return protocolPrefix + msg + SchemaVersionV3, nil
+	if epoch >= beaconConfig.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 && altairMapping[msg] {
-		return protocolPrefix + msg + SchemaVersionV2, nil
+	if epoch >= beaconConfig.AltairForkEpoch {
+		if version, ok := altairMapping[msg]; ok {
+			return protocolPrefix + msg + version, nil
+		}
 	}
 
 	return protocolPrefix + msg + SchemaVersionV1, nil

beacon-chain/p2p/rpc_topic_mappings_test.go

@@ -119,50 +119,36 @@ func TestTopicFromMessage_CorrectType(t *testing.T) {
 	})
 
 	t.Run("after altair fork but before fulu fork", func(t *testing.T) {
-		for m := range messageMapping {
-			topic, err := TopicFromMessage(m, altairForkEpoch)
-			require.NoError(t, err)
+		// Not modified in altair fork.
+		topic, err := TopicFromMessage(GoodbyeMessageName, altairForkEpoch)
+		require.NoError(t, err)
+		require.Equal(t, "/eth2/beacon_chain/req/goodbye/1", topic)
 
-			if altairMapping[m] {
-				require.Equal(t, true, strings.Contains(topic, SchemaVersionV2))
-				_, _, version, err := TopicDeconstructor(topic)
-				require.NoError(t, err)
-				require.Equal(t, SchemaVersionV2, version)
-				continue
-			}
-
-			require.Equal(t, true, strings.Contains(topic, SchemaVersionV1))
-			_, _, version, err := TopicDeconstructor(topic)
-			require.NoError(t, err)
-			require.Equal(t, SchemaVersionV1, version)
-		}
+		// Modified in altair fork.
+		topic, err = TopicFromMessage(MetadataMessageName, altairForkEpoch)
+		require.NoError(t, err)
+		require.Equal(t, "/eth2/beacon_chain/req/metadata/2", topic)
 	})
 
 	t.Run("after fulu fork", func(t *testing.T) {
-		for m := range messageMapping {
-			topic, err := TopicFromMessage(m, fuluForkEpoch)
-			require.NoError(t, err)
+		// Not modified in any fork.
+		topic, err := TopicFromMessage(GoodbyeMessageName, fuluForkEpoch)
+		require.NoError(t, err)
+		require.Equal(t, "/eth2/beacon_chain/req/goodbye/1", topic)
 
-			if fuluMapping[m] {
-				require.Equal(t, true, strings.Contains(topic, SchemaVersionV3))
-				_, _, version, err := TopicDeconstructor(topic)
-				require.NoError(t, err)
-				require.Equal(t, SchemaVersionV3, version)
-				continue
-			}
+		// Modified in altair fork.
+		topic, err = TopicFromMessage(BeaconBlocksByRangeMessageName, fuluForkEpoch)
+		require.NoError(t, err)
+		require.Equal(t, "/eth2/beacon_chain/req/beacon_blocks_by_range/2", topic)
 
-			if altairMapping[m] {
-				require.Equal(t, true, strings.Contains(topic, SchemaVersionV2))
-				_, _, version, err := TopicDeconstructor(topic)
-				require.NoError(t, err)
-				require.Equal(t, SchemaVersionV2, version)
-				continue
-			}
+		// Modified in fulu fork.
+		topic, err = TopicFromMessage(StatusMessageName, fuluForkEpoch)
+		require.NoError(t, err)
+		require.Equal(t, "/eth2/beacon_chain/req/status/2", topic)
 
-			require.Equal(t, true, strings.Contains(topic, SchemaVersionV1))
-			_, _, version, err := TopicDeconstructor(topic)
-			require.NoError(t, err)
-			require.Equal(t, SchemaVersionV1, version)
-		}
+		// Modified both in altair and fulu fork.
+		topic, err = TopicFromMessage(MetadataMessageName, fuluForkEpoch)
+		require.NoError(t, err)
+		require.Equal(t, "/eth2/beacon_chain/req/metadata/3", topic)
 	})
 }

beacon-chain/p2p/service.go

@@ -14,7 +14,6 @@ import (
 	"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/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/features"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	leakybucket "github.com/OffchainLabs/prysm/v6/container/leaky-bucket"
@@ -83,7 +82,6 @@ type Service struct {
 	genesisTime           time.Time
 	genesisValidatorsRoot []byte
 	activeValidatorCount  uint64
-	clock                 *startup.Clock
 }
 
 // NewService initializes a new p2p service compatible with shared.Service interface. No

beacon-chain/p2p/service_test.go

@@ -10,11 +10,10 @@ import (
 
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
-	"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/startup"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	prysmTime "github.com/OffchainLabs/prysm/v6/time"
@@ -347,56 +346,59 @@ func TestService_JoinLeaveTopic(t *testing.T) {
 func initializeStateWithForkDigest(_ context.Context, t *testing.T, gs startup.ClockSetter) [4]byte {
 	gt := prysmTime.Now()
 	gvr := bytesutil.ToBytes32(bytesutil.PadTo([]byte("genesis validators root"), 32))
-	clock := startup.NewClock(gt, gvr)
-	require.NoError(t, gs.SetClock(clock))
+	require.NoError(t, gs.SetClock(startup.NewClock(gt, gvr)))
+
+	fd, err := forks.CreateForkDigest(gt, gvr[:])
+	require.NoError(t, err)
 
 	time.Sleep(50 * time.Millisecond) // wait for pubsub filter to initialize.
 
-	return params.ForkDigest(clock.CurrentEpoch())
+	return fd
 }
 
-func TestService_connectWithPeer(t *testing.T) {
-	params.SetupTestConfigCleanup(t)
-	tests := []struct {
-		name    string
-		peers   *peers.Status
-		info    peer.AddrInfo
-		wantErr string
-	}{
-		{
-			name: "bad peer",
-			peers: func() *peers.Status {
-				ps := peers.NewStatus(context.Background(), &peers.StatusConfig{
-					ScorerParams: &scorers.Config{},
-				})
-				for i := 0; i < 10; i++ {
-					ps.Scorers().BadResponsesScorer().Increment("bad")
-				}
-				return ps
-			}(),
-			info:    peer.AddrInfo{ID: "bad"},
-			wantErr: "refused to connect to bad peer",
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			h, _, _ := createHost(t, 34567)
-			defer func() {
-				if err := h.Close(); err != nil {
-					t.Fatal(err)
-				}
-			}()
-			ctx := context.Background()
-			s := &Service{
-				host:  h,
-				peers: tt.peers,
-			}
-			err := s.connectWithPeer(ctx, tt.info)
-			if len(tt.wantErr) > 0 {
-				require.ErrorContains(t, tt.wantErr, err)
-			} else {
-				require.NoError(t, err)
-			}
-		})
-	}
-}
+// TODO: Uncomment when out of devnet
+// func TestService_connectWithPeer(t *testing.T) {
+// 	params.SetupTestConfigCleanup(t)
+// 	tests := []struct {
+// 		name    string
+// 		peers   *peers.Status
+// 		info    peer.AddrInfo
+// 		wantErr string
+// 	}{
+// 		{
+// 			name: "bad peer",
+// 			peers: func() *peers.Status {
+// 				ps := peers.NewStatus(context.Background(), &peers.StatusConfig{
+// 					ScorerParams: &scorers.Config{},
+// 				})
+// 				for i := 0; i < 10; i++ {
+// 					ps.Scorers().BadResponsesScorer().Increment("bad")
+// 				}
+// 				return ps
+// 			}(),
+// 			info:    peer.AddrInfo{ID: "bad"},
+// 			wantErr: "refused to connect to bad peer",
+// 		},
+// 	}
+// 	for _, tt := range tests {
+// 		t.Run(tt.name, func(t *testing.T) {
+// 			h, _, _ := createHost(t, 34567)
+// 			defer func() {
+// 				if err := h.Close(); err != nil {
+// 					t.Fatal(err)
+// 				}
+// 			}()
+// 			ctx := context.Background()
+// 			s := &Service{
+// 				host:  h,
+// 				peers: tt.peers,
+// 			}
+// 			err := s.connectWithPeer(ctx, tt.info)
+// 			if len(tt.wantErr) > 0 {
+// 				require.ErrorContains(t, tt.wantErr, err)
+// 			} else {
+// 				require.NoError(t, err)
+// 			}
+// 		})
+// 	}
+// }

beacon-chain/p2p/subnets.go

@@ -23,7 +23,6 @@ import (
 	"github.com/holiman/uint256"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/go-bitfield"
-	"github.com/sirupsen/logrus"
 )
 
 var (
@@ -74,8 +73,8 @@ func (s *Service) nodeFilter(topic string, index uint64) (func(node *enode.Node)
 
 // searchForPeers performs a network search for peers subscribed to a particular subnet.
 // It exits as soon as one of these conditions is met:
-// - It looped through `batchSize` nodes.
-// - It found `peersToFindCount“ peers corresponding to the `filter` criteria.
+// - It looped during `batchPeriod` duration, or
+// - It found `peersToFindCount“ peers corresponding to the `filter` criteria, or
 // - Iterator is exhausted.
 func searchForPeers(
 	iterator enode.Iterator,
@@ -147,8 +146,6 @@ func (s *Service) FindPeersWithSubnet(
 	index uint64,
 	threshold int,
 ) (bool, error) {
-	const minLogInterval = 1 * time.Minute
-
 	ctx, span := trace.StartSpan(ctx, "p2p.FindPeersWithSubnet")
 	defer span.End()
 
@@ -168,41 +165,29 @@ func (s *Service) FindPeersWithSubnet(
 		return false, errors.Wrap(err, "node filter")
 	}
 
-	peersSummary := func(topic string, threshold int) (int, int) {
+	peersSummary := func(topic string, threshold int) int {
 		// Retrieve how many peers we have for this topic.
 		peerCountForTopic := len(s.pubsub.ListPeers(topic))
 
 		// Compute how many peers we are missing to reach the threshold.
 		missingPeerCountForTopic := max(0, threshold-peerCountForTopic)
 
-		return peerCountForTopic, missingPeerCountForTopic
+		return missingPeerCountForTopic
 	}
 
 	// Compute how many peers we are missing to reach the threshold.
-	peerCountForTopic, missingPeerCountForTopic := peersSummary(topic, threshold)
+	missingPeerCountForTopic := peersSummary(topic, threshold)
 
 	// Exit early if we have enough peers.
 	if missingPeerCountForTopic == 0 {
 		return true, nil
 	}
 
-	log := log.WithFields(logrus.Fields{
-		"topic":           topic,
-		"targetPeerCount": threshold,
-	})
-
-	log.WithField("currentPeerCount", peerCountForTopic).Debug("Searching for new peers for a subnet - start")
-
-	lastLogTime := time.Now()
-
 	wg := new(sync.WaitGroup)
 	for {
 		// If the context is done, we can exit the loop. This is the unhappy path.
-		if err := ctx.Err(); err != nil {
-			return false, errors.Errorf(
-				"unable to find requisite number of peers for topic %s - only %d out of %d peers available after searching",
-				topic, peerCountForTopic, threshold,
-			)
+		if ctx.Err() != nil {
+			return false, nil
 		}
 
 		// Search for new peers in the network.
@@ -225,20 +210,14 @@ func (s *Service) FindPeersWithSubnet(
 			wg.Wait()
 		}
 
-		peerCountForTopic, missingPeerCountForTopic := peersSummary(topic, threshold)
+		missingPeerCountForTopic := peersSummary(topic, threshold)
 
 		// If we have enough peers, we can exit the loop. This is the happy path.
 		if missingPeerCountForTopic == 0 {
 			break
 		}
-
-		if time.Since(lastLogTime) > minLogInterval {
-			lastLogTime = time.Now()
-			log.WithField("currentPeerCount", peerCountForTopic).Debug("Searching for new peers for a subnet - continue")
-		}
 	}
 
-	log.WithField("currentPeerCount", threshold).Debug("Searching for new peers for a subnet - success")
 	return true, nil
 }
 

beacon-chain/p2p/testing/mock_peersprovider.go

@@ -65,7 +65,7 @@ func (m *MockPeersProvider) Peers() *peers.Status {
 		}
 		m.peers.Add(createENR(), id0, ma0, network.DirInbound)
 		m.peers.SetConnectionState(id0, peers.Connected)
-		m.peers.SetChainState(id0, &pb.Status{FinalizedEpoch: 10})
+		m.peers.SetChainState(id0, &pb.StatusV2{FinalizedEpoch: 10})
 		id1, err := peer.Decode(MockRawPeerId1)
 		if err != nil {
 			log.WithError(err).Debug("Cannot decode")
@@ -76,7 +76,7 @@ func (m *MockPeersProvider) Peers() *peers.Status {
 		}
 		m.peers.Add(createENR(), id1, ma1, network.DirOutbound)
 		m.peers.SetConnectionState(id1, peers.Connected)
-		m.peers.SetChainState(id1, &pb.Status{FinalizedEpoch: 11})
+		m.peers.SetChainState(id1, &pb.StatusV2{FinalizedEpoch: 11})
 	}
 	return m.peers
 }

beacon-chain/p2p/types/rpc_errors.go

@@ -9,10 +9,13 @@ var (
 	ErrInvalidSequenceNum     = errors.New("invalid sequence number provided")
 	ErrGeneric                = errors.New("internal service error")
 
-	ErrRateLimited         = errors.New("rate limited")
-	ErrIODeadline          = errors.New("i/o deadline exceeded")
-	ErrInvalidRequest      = errors.New("invalid range, step or count")
-	ErrBlobLTMinRequest    = errors.New("blob epoch < minimum_request_epoch")
-	ErrMaxBlobReqExceeded  = errors.New("requested more than MAX_REQUEST_BLOB_SIDECARS")
+	ErrRateLimited      = errors.New("rate limited")
+	ErrIODeadline       = errors.New("i/o deadline exceeded")
+	ErrInvalidRequest   = errors.New("invalid range, step or count")
+	ErrBlobLTMinRequest = errors.New("blob epoch < minimum_request_epoch")
+
+	ErrMaxBlobReqExceeded       = errors.New("requested more than MAX_REQUEST_BLOB_SIDECARS")
+	ErrMaxDataColumnReqExceeded = errors.New("requested more than MAX_REQUEST_DATA_COLUMN_SIDECARS")
+
 	ErrResourceUnavailable = errors.New("resource requested unavailable")
 )

beacon-chain/p2p/types/types.go

@@ -206,8 +206,8 @@ func (s BlobSidecarsByRootReq) Swap(i, j int) {
 }
 
 // Len is the number of elements in the collection.
-func (s BlobSidecarsByRootReq) Len() int {
-	return len(s)
+func (s *BlobSidecarsByRootReq) Len() int {
+	return len(*s)
 }
 
 // ====================================

beacon-chain/rpc/eth/config/BUILD.bazel

@@ -9,6 +9,7 @@ go_library(
         "//api/server/structs:go_default_library",
         "//config/params:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
+        "//network/forks:go_default_library",
         "//network/httputil:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
     ],
@@ -23,6 +24,7 @@ go_test(
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//network/forks:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",

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

@@ -10,6 +10,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 )
@@ -32,25 +33,34 @@ func GetForkSchedule(w http.ResponseWriter, r *http.Request) {
 	_, span := trace.StartSpan(r.Context(), "config.GetForkSchedule")
 	defer span.End()
 
-	schedule := params.SortedForkSchedule()
-	data := make([]*structs.Fork, 0, len(schedule))
+	schedule := params.BeaconConfig().ForkVersionSchedule
 	if len(schedule) == 0 {
 		httputil.WriteJson(w, &structs.GetForkScheduleResponse{
-			Data: data,
+			Data: make([]*structs.Fork, 0),
 		})
+		return
 	}
-	previous := schedule[0]
-	for _, entry := range schedule {
-		data = append(data, &structs.Fork{
-			PreviousVersion: hexutil.Encode(previous.ForkVersion[:]),
-			CurrentVersion:  hexutil.Encode(entry.ForkVersion[:]),
-			Epoch:           fmt.Sprintf("%d", entry.Epoch),
-		})
-		previous = entry
+
+	versions := forks.SortedForkVersions(schedule)
+	chainForks := make([]*structs.Fork, len(schedule))
+	var previous, current []byte
+	for i, v := range versions {
+		if i == 0 {
+			previous = params.BeaconConfig().GenesisForkVersion
+		} else {
+			previous = current
+		}
+		copyV := v
+		current = copyV[:]
+		chainForks[i] = &structs.Fork{
+			PreviousVersion: hexutil.Encode(previous),
+			CurrentVersion:  hexutil.Encode(current),
+			Epoch:           fmt.Sprintf("%d", schedule[v]),
+		}
 	}
 
 	httputil.WriteJson(w, &structs.GetForkScheduleResponse{
-		Data: data,
+		Data: chainForks,
 	})
 }
 

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

@@ -13,6 +13,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/ethereum/go-ethereum/common"
@@ -632,7 +633,7 @@ func TestForkSchedule_Ok(t *testing.T) {
 		require.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.GetForkScheduleResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
-		os := params.SortedForkSchedule()
-		assert.Equal(t, len(os), len(resp.Data))
+		os := forks.NewOrderedSchedule(params.BeaconConfig())
+		assert.Equal(t, os.Len(), len(resp.Data))
 	})
 }

beacon-chain/rpc/eth/debug/BUILD.bazel

@@ -35,6 +35,7 @@ go_test(
         "//beacon-chain/forkchoice/doubly-linked-tree:go_default_library",
         "//beacon-chain/forkchoice/types:go_default_library",
         "//beacon-chain/rpc/testutil:go_default_library",
+        "//config/params:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//runtime/version:go_default_library",
         "//testing/assert:go_default_library",

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

@@ -15,6 +15,7 @@ import (
 	doublylinkedtree "github.com/OffchainLabs/prysm/v6/beacon-chain/forkchoice/doubly-linked-tree"
 	forkchoicetypes "github.com/OffchainLabs/prysm/v6/beacon-chain/forkchoice/types"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/testutil"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -219,9 +220,10 @@ func TestGetBeaconStateV2(t *testing.T) {
 		resp := &structs.GetBeaconStateV2Response{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
 		assert.Equal(t, version.String(version.Fulu), resp.Version)
-		st := &structs.BeaconStateElectra{}
+		st := &structs.BeaconStateFulu{}
 		require.NoError(t, json.Unmarshal(resp.Data, st))
 		assert.Equal(t, "123", st.Slot)
+		assert.Equal(t, int(params.BeaconConfig().MinSeedLookahead+1)*int(params.BeaconConfig().SlotsPerEpoch), len(st.ProposerLookahead))
 	})
 	t.Run("execution optimistic", func(t *testing.T) {
 		parentRoot := [32]byte{'a'}

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

@@ -72,8 +72,6 @@ const (
 	LightClientFinalityUpdateTopic = "light_client_finality_update"
 	// LightClientOptimisticUpdateTopic represents a new light client optimistic update event topic.
 	LightClientOptimisticUpdateTopic = "light_client_optimistic_update"
-	// DataColumnTopic represents a data column sidecar event topic
-	DataColumnTopic = "data_column_sidecar"
 )
 
 var (
@@ -107,7 +105,6 @@ var opsFeedEventTopics = map[feed.EventType]string{
 	operation.AttesterSlashingReceived:          AttesterSlashingTopic,
 	operation.ProposerSlashingReceived:          ProposerSlashingTopic,
 	operation.BlockGossipReceived:               BlockGossipTopic,
-	operation.DataColumnReceived:                DataColumnTopic,
 }
 
 var stateFeedEventTopics = map[feed.EventType]string{
@@ -464,8 +461,6 @@ func topicForEvent(event *feed.Event) string {
 		return BlockTopic
 	case payloadattribute.EventData:
 		return PayloadAttributesTopic
-	case *operation.DataColumnReceivedData:
-		return DataColumnTopic
 	default:
 		return InvalidTopic
 	}
@@ -500,19 +495,6 @@ func (s *Server) lazyReaderForEvent(ctx context.Context, event *feed.Event, topi
 			}
 			return jsonMarshalReader(eventName, blk)
 		}, nil
-	case *operation.DataColumnReceivedData:
-		return func() io.Reader {
-			kzgCommitments := make([]string, len(v.KzgCommitments))
-			for i, kzgCommitment := range v.KzgCommitments {
-				kzgCommitments[i] = hexutil.Encode(kzgCommitment)
-			}
-			return jsonMarshalReader(eventName, &structs.DataColumnGossipEvent{
-				Slot:           fmt.Sprintf("%d", v.Slot),
-				Index:          fmt.Sprintf("%d", v.Index),
-				BlockRoot:      hexutil.Encode(v.BlockRoot[:]),
-				KzgCommitments: kzgCommitments,
-			})
-		}, nil
 	case *operation.AggregatedAttReceivedData:
 		switch att := v.Attestation.AggregateVal().(type) {
 		case *eth.Attestation:

beacon-chain/rpc/eth/events/events_test.go

@@ -31,7 +31,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/r3labs/sse/v2"
+	sse "github.com/r3labs/sse/v2"
 	"github.com/sirupsen/logrus"
 )
 
@@ -121,7 +121,6 @@ func operationEventsFixtures(t *testing.T) (*topicRequest, []*feed.Event) {
 		AttesterSlashingTopic,
 		ProposerSlashingTopic,
 		BlockGossipTopic,
-		DataColumnTopic,
 	})
 	require.NoError(t, err)
 	ro, err := blocks.NewROBlob(util.HydrateBlobSidecar(&eth.BlobSidecar{}))
@@ -302,15 +301,6 @@ func operationEventsFixtures(t *testing.T) (*topicRequest, []*feed.Event) {
 				SignedBlock: signedBlock,
 			},
 		},
-		{
-			Type: operation.DataColumnReceived,
-			Data: &operation.DataColumnReceivedData{
-				Slot:           1,
-				Index:          2,
-				BlockRoot:      [32]byte{'a'},
-				KzgCommitments: [][]byte{{'a'}, {'b'}, {'c'}},
-			},
-		},
 	}
 }
 
@@ -719,7 +709,7 @@ func TestStuckReaderScenarios(t *testing.T) {
 
 func wedgedWriterTestCase(t *testing.T, queueDepth func([]*feed.Event) int) {
 	topics, events := operationEventsFixtures(t)
-	require.Equal(t, 12, len(events))
+	require.Equal(t, 11, len(events))
 
 	// set eventFeedDepth to a number lower than the events we intend to send to force the server to drop the reader.
 	stn := mockChain.NewEventFeedWrapper()

beacon-chain/rpc/eth/light-client/BUILD.bazel

@@ -20,6 +20,7 @@ go_library(
         "//config/params:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
+        "//network/forks:go_default_library",
         "//network/httputil:go_default_library",
         "//runtime/version:go_default_library",
         "//time/slots:go_default_library",

beacon-chain/rpc/eth/light-client/handlers.go

@@ -11,6 +11,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
+	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -114,7 +115,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 
 			updateSlot := update.AttestedHeader().Beacon().Slot
 			updateEpoch := slots.ToEpoch(updateSlot)
-			updateFork, err := params.Fork(updateEpoch)
+			updateFork, err := forks.Fork(updateEpoch)
 			if err != nil {
 				httputil.HandleError(w, "Could not get fork Version: "+err.Error(), http.StatusInternalServerError)
 				return

beacon-chain/rpc/lookup/BUILD.bazel

@@ -10,11 +10,13 @@ go_library(
     visibility = ["//visibility:public"],
     deps = [
         "//beacon-chain/blockchain:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/db/filesystem:go_default_library",
         "//beacon-chain/rpc/core:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/stategen:go_default_library",
+        "//cmd/beacon-chain/flags:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",
@@ -36,6 +38,7 @@ go_test(
     ],
     embed = [":go_default_library"],
     deps = [
+        "//beacon-chain/blockchain/kzg:go_default_library",
         "//beacon-chain/blockchain/testing:go_default_library",
         "//beacon-chain/db/filesystem:go_default_library",
         "//beacon-chain/db/testing:go_default_library",
@@ -47,12 +50,16 @@ go_test(
         "//beacon-chain/verification:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
+        "@com_github_consensys_gnark_crypto//ecc/bls12-381/fr:go_default_library",
+        "@com_github_crate_crypto_go_kzg_4844//:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
     ],
 )

beacon-chain/rpc/lookup/blocker.go

@@ -3,12 +3,15 @@ package lookup
 import (
 	"context"
 	"fmt"
+	"math"
 	"strconv"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filesystem"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/core"
+	"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/blocks"
@@ -49,6 +52,7 @@ type BeaconDbBlocker struct {
 	ChainInfoFetcher   blockchain.ChainInfoFetcher
 	GenesisTimeFetcher blockchain.TimeFetcher
 	BlobStorage        *filesystem.BlobStorage
+	DataColumnStorage  *filesystem.DataColumnStorage
 }
 
 // Block returns the beacon block for a given identifier. The identifier can be one of:
@@ -129,6 +133,137 @@ func (p *BeaconDbBlocker) Block(ctx context.Context, id []byte) (interfaces.Read
 	return blk, nil
 }
 
+// blobsFromStoredBlobs retrieves blobs corresponding to `indices` and `root` from the store.
+// This function expects blobs to be stored directly (aka. no data columns).
+func (p *BeaconDbBlocker) blobsFromStoredBlobs(indices []int, root []byte, commitments [][]byte) ([]*blocks.VerifiedROBlob, *core.RpcError) {
+	sum := p.BlobStorage.Summary(bytesutil.ToBytes32(root))
+
+	if len(indices) == 0 {
+		for index := range commitments {
+			if sum.HasIndex(uint64(index)) {
+				indices = append(indices, index)
+			}
+		}
+	} else {
+		for _, index := range indices {
+			if uint64(index) >= sum.MaxBlobsForEpoch() {
+				return nil, &core.RpcError{
+					Err:    fmt.Errorf("requested index %d is bigger than the maximum possible blob count %d", index, sum.MaxBlobsForEpoch()),
+					Reason: core.BadRequest,
+				}
+			}
+
+			if !sum.HasIndex(uint64(index)) {
+				return nil, &core.RpcError{
+					Err:    fmt.Errorf("requested index %d not found", index),
+					Reason: core.NotFound,
+				}
+			}
+		}
+	}
+
+	blobs := make([]*blocks.VerifiedROBlob, 0, len(indices))
+	for _, index := range indices {
+		vblob, err := p.BlobStorage.Get(bytesutil.ToBytes32(root), uint64(index))
+		if err != nil {
+			return nil, &core.RpcError{
+				Err:    fmt.Errorf("could not retrieve blob for block root %#x at index %d", root, index),
+				Reason: core.Internal,
+			}
+		}
+		blobs = append(blobs, &vblob)
+	}
+
+	return blobs, nil
+}
+
+// blobsFromStoredDataColumns retrieves data columns from the store, reconstruct the whole matrix if needed, convert the matrix to blobs,
+// and then returns blobs corresponding to `indices` and `root` from the store,
+// This function expects data columns to be stored (aka. no blobs).
+// If not enough data columns are available to extract blobs from them (either directly or after reconstruction), an error is returned.
+func (p *BeaconDbBlocker) blobsFromStoredDataColumns(block blocks.ROBlock, indices []int, rootBytes []byte) ([]*blocks.VerifiedROBlob, *core.RpcError) {
+	root := bytesutil.ToBytes32(rootBytes)
+
+	// Use all indices if none are provided.
+	if len(indices) == 0 {
+		commitments, err := block.Block().Body().BlobKzgCommitments()
+		if err != nil {
+			return nil, &core.RpcError{
+				Err:    errors.Wrap(err, "could not retrieve blob commitments"),
+				Reason: core.Internal,
+			}
+		}
+
+		for index := range commitments {
+			indices = append(indices, index)
+		}
+	}
+
+	// Count how many columns we have in the store.
+	summary := p.DataColumnStorage.Summary(root)
+	stored := summary.Stored()
+	count := uint64(len(stored))
+
+	if count < peerdas.MinimumColumnsCountToReconstruct() {
+		// There is no way to reconstruct the data columns.
+		return nil, &core.RpcError{
+			Err:    errors.Errorf("the node does not custody enough data columns to reconstruct blobs. Please start the beacon node with the `--%s` flag to ensure this call to success, or retry later if it is already the case.", flags.SubscribeAllDataSubnets.Name),
+			Reason: core.NotFound,
+		}
+	}
+
+	// Retrieve from the database needed data columns.
+	verifiedRoDataColumnSidecars, err := p.neededDataColumnSidecars(root, stored)
+	if err != nil {
+		return nil, &core.RpcError{
+			Err:    errors.Wrap(err, "needed data column sidecars"),
+			Reason: core.Internal,
+		}
+	}
+
+	verifiedRoBlobSidecars, err := peerdas.ReconstructBlobs(block, verifiedRoDataColumnSidecars, indices)
+	if err != nil {
+		return nil, &core.RpcError{
+			Err:    errors.Wrap(err, "blobs from data columns"),
+			Reason: core.Internal,
+		}
+	}
+
+	return verifiedRoBlobSidecars, nil
+}
+
+func (p *BeaconDbBlocker) neededDataColumnSidecars(root [fieldparams.RootLength]byte, stored map[uint64]bool) ([]blocks.VerifiedRODataColumn, error) {
+	// Check if we have all the non-extended data columns.
+	cellsPerBlob := fieldparams.CellsPerBlob
+	blobIndices := make([]uint64, 0, cellsPerBlob)
+	hasAllBlobColumns := true
+	for i := range uint64(cellsPerBlob) {
+		if !stored[i] {
+			hasAllBlobColumns = false
+			break
+		}
+		blobIndices = append(blobIndices, i)
+	}
+
+	if hasAllBlobColumns {
+		// Retrieve only the non-extended data columns.
+		verifiedRoSidecars, err := p.DataColumnStorage.Get(root, blobIndices)
+		if err != nil {
+			return nil, errors.Wrap(err, "data columns storage get")
+		}
+
+		return verifiedRoSidecars, nil
+	}
+
+	// Retrieve all the data columns.
+	verifiedRoSidecars, err := p.DataColumnStorage.Get(root, nil)
+	if err != nil {
+		return nil, errors.Wrap(err, "data columns storage get")
+	}
+
+	return verifiedRoSidecars, nil
+}
+
 // Blobs returns the blobs for a given block id identifier and blob indices. The identifier can be one of:
 //   - "head" (canonical head in node's view)
 //   - "genesis"
@@ -212,64 +347,55 @@ func (p *BeaconDbBlocker) Blobs(ctx context.Context, id string, indices []int) (
 
 	root := bytesutil.ToBytes32(rootSlice)
 
-	b, err := p.BeaconDB.Block(ctx, root)
+	roSignedBlock, err := p.BeaconDB.Block(ctx, root)
 	if err != nil {
 		return nil, &core.RpcError{Err: errors.Wrapf(err, "failed to retrieve block %#x from db", rootSlice), Reason: core.Internal}
 	}
-	if b == nil {
+
+	if roSignedBlock == nil {
 		return nil, &core.RpcError{Err: fmt.Errorf("block %#x not found in db", rootSlice), Reason: core.NotFound}
 	}
 
-	// if block is not in the retention window, return 200 w/ empty list
-	if !p.BlobStorage.WithinRetentionPeriod(slots.ToEpoch(b.Block().Slot()), slots.ToEpoch(p.GenesisTimeFetcher.CurrentSlot())) {
+	// If block is not in the retention window, return 200 w/ empty list
+	if !p.BlobStorage.WithinRetentionPeriod(slots.ToEpoch(roSignedBlock.Block().Slot()), slots.ToEpoch(p.GenesisTimeFetcher.CurrentSlot())) {
 		return make([]*blocks.VerifiedROBlob, 0), nil
 	}
 
-	commitments, err := b.Block().Body().BlobKzgCommitments()
+	roBlock := roSignedBlock.Block()
+
+	commitments, err := roBlock.Body().BlobKzgCommitments()
 	if err != nil {
 		return nil, &core.RpcError{Err: errors.Wrapf(err, "failed to retrieve kzg commitments from block %#x", rootSlice), Reason: core.Internal}
 	}
+
 	// if there are no commitments return 200 w/ empty list
 	if len(commitments) == 0 {
 		return make([]*blocks.VerifiedROBlob, 0), nil
 	}
 
-	sum := p.BlobStorage.Summary(root)
+	// Get the slot of the block.
+	blockSlot := roBlock.Slot()
 
-	if len(indices) == 0 {
-		for i := range commitments {
-			if sum.HasIndex(uint64(i)) {
-				indices = append(indices, i)
-			}
-		}
-	} else {
-		for _, ix := range indices {
-			if uint64(ix) >= sum.MaxBlobsForEpoch() {
-				return nil, &core.RpcError{
-					Err:    fmt.Errorf("requested index %d is bigger than the maximum possible blob count %d", ix, sum.MaxBlobsForEpoch()),
-					Reason: core.BadRequest,
-				}
-			}
-			if !sum.HasIndex(uint64(ix)) {
-				return nil, &core.RpcError{
-					Err:    fmt.Errorf("requested index %d not found", ix),
-					Reason: core.NotFound,
-				}
-			}
-		}
-	}
+	// Get the first peerDAS epoch.
+	fuluForkEpoch := params.BeaconConfig().FuluForkEpoch
 
-	blobs := make([]*blocks.VerifiedROBlob, len(indices))
-	for i, index := range indices {
-		vblob, err := p.BlobStorage.Get(root, uint64(index))
+	// Compute the first peerDAS slot.
+	fuluForkSlot := primitives.Slot(math.MaxUint64)
+	if fuluForkEpoch != primitives.Epoch(math.MaxUint64) {
+		fuluForkSlot, err = slots.EpochStart(fuluForkEpoch)
 		if err != nil {
-			return nil, &core.RpcError{
-				Err:    fmt.Errorf("could not retrieve blob for block root %#x at index %d", rootSlice, index),
-				Reason: core.Internal,
-			}
+			return nil, &core.RpcError{Err: errors.Wrap(err, "could not calculate peerDAS start slot"), Reason: core.Internal}
 		}
-		blobs[i] = &vblob
 	}
 
-	return blobs, nil
+	if blockSlot >= fuluForkSlot {
+		roBlock, err := blocks.NewROBlockWithRoot(roSignedBlock, root)
+		if err != nil {
+			return nil, &core.RpcError{Err: errors.Wrapf(err, "failed to create roBlock with root %#x", root), Reason: core.Internal}
+		}
+
+		return p.blobsFromStoredDataColumns(roBlock, indices, rootSlice)
+	}
+
+	return p.blobsFromStoredBlobs(indices, rootSlice, commitments)
 }

beacon-chain/rpc/lookup/blocker_test.go

@@ -1,7 +1,10 @@
 package lookup
 
 import (
+	"bytes"
 	"context"
+	"crypto/sha256"
+	"encoding/binary"
 	"fmt"
 	"math"
 	"net/http"
@@ -9,6 +12,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
 	mockChain "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filesystem"
 	testDB "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
@@ -17,12 +21,16 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/verification"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	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/consensys/gnark-crypto/ecc/bls12-381/fr"
+	GoKZG "github.com/crate-crypto/go-kzg-4844"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/sirupsen/logrus"
 )
 
 func TestGetBlock(t *testing.T) {
@@ -158,6 +166,118 @@ func TestGetBlock(t *testing.T) {
 	}
 }
 
+func deterministicRandomness(seed int64) [32]byte {
+	// Converts an int64 to a byte slice
+	buf := new(bytes.Buffer)
+	err := binary.Write(buf, binary.BigEndian, seed)
+	if err != nil {
+		logrus.WithError(err).Error("Failed to write int64 to bytes buffer")
+		return [32]byte{}
+	}
+	bytes := buf.Bytes()
+
+	return sha256.Sum256(bytes)
+}
+
+// Returns a serialized random field element in big-endian
+func getRandFieldElement(seed int64) [32]byte {
+	bytes := deterministicRandomness(seed)
+	var r fr.Element
+	r.SetBytes(bytes[:])
+
+	return GoKZG.SerializeScalar(r)
+}
+
+// Returns a random blob using the passed seed as entropy
+func getRandBlob(seed int64) kzg.Blob {
+	var blob kzg.Blob
+	for i := 0; i < len(blob); i += 32 {
+		fieldElementBytes := getRandFieldElement(seed + int64(i))
+		copy(blob[i:i+32], fieldElementBytes[:])
+	}
+	return blob
+}
+
+func generateCommitmentAndProof(blob *kzg.Blob) (*kzg.Commitment, *kzg.Proof, error) {
+	commitment, err := kzg.BlobToKZGCommitment(blob)
+	if err != nil {
+		return nil, nil, err
+	}
+	proof, err := kzg.ComputeBlobKZGProof(blob, commitment)
+	if err != nil {
+		return nil, nil, err
+	}
+	return &commitment, &proof, err
+}
+
+func generateRandomBlocSignedBeaconBlockkAndVerifiedRoBlobs(t *testing.T, blobCount int) (interfaces.SignedBeaconBlock, []*blocks.VerifiedROBlob) {
+	// Create a protobuf signed beacon block.
+	signedBeaconBlockPb := util.NewBeaconBlockDeneb()
+
+	// Generate random blobs and their corresponding commitments and proofs.
+	blobs := make([]kzg.Blob, 0, blobCount)
+	blobKzgCommitments := make([]*kzg.Commitment, 0, blobCount)
+	blobKzgProofs := make([]*kzg.Proof, 0, blobCount)
+
+	for blobIndex := range blobCount {
+		// Create a random blob.
+		blob := getRandBlob(int64(blobIndex))
+		blobs = append(blobs, blob)
+
+		// Generate a blobKZGCommitment for the blob.
+		blobKZGCommitment, proof, err := generateCommitmentAndProof(&blob)
+		require.NoError(t, err)
+
+		blobKzgCommitments = append(blobKzgCommitments, blobKZGCommitment)
+		blobKzgProofs = append(blobKzgProofs, proof)
+	}
+
+	// Set the commitments into the block.
+	blobZkgCommitmentsBytes := make([][]byte, 0, blobCount)
+	for _, blobKZGCommitment := range blobKzgCommitments {
+		blobZkgCommitmentsBytes = append(blobZkgCommitmentsBytes, blobKZGCommitment[:])
+	}
+
+	signedBeaconBlockPb.Block.Body.BlobKzgCommitments = blobZkgCommitmentsBytes
+
+	// Generate verified RO blobs.
+	verifiedROBlobs := make([]*blocks.VerifiedROBlob, 0, blobCount)
+
+	// Create a signed beacon block from the protobuf.
+	signedBeaconBlock, err := blocks.NewSignedBeaconBlock(signedBeaconBlockPb)
+	require.NoError(t, err)
+
+	commitmentInclusionProof, err := blocks.MerkleProofKZGCommitments(signedBeaconBlock.Block().Body())
+	require.NoError(t, err)
+
+	for blobIndex := range blobCount {
+		blob := blobs[blobIndex]
+		blobKZGCommitment := blobKzgCommitments[blobIndex]
+		blobKzgProof := blobKzgProofs[blobIndex]
+
+		// Get the signed beacon block header.
+		signedBeaconBlockHeader, err := signedBeaconBlock.Header()
+		require.NoError(t, err)
+
+		blobSidecar := &ethpb.BlobSidecar{
+			Index:                    uint64(blobIndex),
+			Blob:                     blob[:],
+			KzgCommitment:            blobKZGCommitment[:],
+			KzgProof:                 blobKzgProof[:],
+			SignedBlockHeader:        signedBeaconBlockHeader,
+			CommitmentInclusionProof: commitmentInclusionProof,
+		}
+
+		roBlob, err := blocks.NewROBlob(blobSidecar)
+		require.NoError(t, err)
+
+		verifiedROBlob := blocks.NewVerifiedROBlob(roBlob)
+		verifiedROBlobs = append(verifiedROBlobs, &verifiedROBlob)
+	}
+
+	return signedBeaconBlock, verifiedROBlobs
+}
+
 func TestGetBlob(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	cfg := params.BeaconConfig().Copy()

beacon-chain/rpc/prysm/v1alpha1/debug/p2p.go

@@ -109,6 +109,8 @@ func (ds *Server) getPeer(pid peer.ID) (*ethpb.DebugPeerResponse, error) {
 			peerInfo.MetadataV0 = metadata.MetadataObjV0()
 		case metadata.MetadataObjV1() != nil:
 			peerInfo.MetadataV1 = metadata.MetadataObjV1()
+		case metadata.MetadataObjV2() != nil:
+			peerInfo.MetadataV2 = metadata.MetadataObjV2()
 		}
 	}
 	addresses := peerStore.Addrs(pid)
@@ -127,7 +129,7 @@ func (ds *Server) getPeer(pid peer.ID) (*ethpb.DebugPeerResponse, error) {
 	if err != nil {
 		// In the event chain state is non existent, we
 		// initialize with the zero value.
-		pStatus = new(ethpb.Status)
+		pStatus = new(ethpb.StatusV2)
 	}
 	lastUpdated, err := peers.ChainStateLastUpdated(pid)
 	if err != nil {
@@ -150,6 +152,17 @@ func (ds *Server) getPeer(pid peer.ID) (*ethpb.DebugPeerResponse, error) {
 		BehaviourPenalty:   float32(bPenalty),
 		ValidationError:    errorToString(peers.Scorers().ValidationError(pid)),
 	}
+
+	// Convert statusV2 into status
+	// TODO: Should we do it this way or the other way around?
+	peerStatus := &ethpb.Status{
+		ForkDigest:     pStatus.ForkDigest,
+		FinalizedRoot:  pStatus.FinalizedRoot,
+		FinalizedEpoch: pStatus.FinalizedEpoch,
+		HeadRoot:       pStatus.HeadRoot,
+		HeadSlot:       pStatus.HeadSlot,
+	}
+
 	return &ethpb.DebugPeerResponse{
 		ListeningAddresses: stringAddrs,
 		Direction:          pbDirection,
@@ -157,7 +170,7 @@ func (ds *Server) getPeer(pid peer.ID) (*ethpb.DebugPeerResponse, error) {
 		PeerId:             pid.String(),
 		Enr:                enr,
 		PeerInfo:           peerInfo,
-		PeerStatus:         pStatus,
+		PeerStatus:         peerStatus,
 		LastUpdated:        unixTime,
 		ScoreInfo:          scoreInfo,
 	}, nil

beacon-chain/rpc/prysm/v1alpha1/validator/BUILD.bazel

@@ -1,3 +1,5 @@
+# gazelle:ignore
+
 load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 
 go_library(
@@ -37,6 +39,7 @@ go_library(
         "//api/client/builder:go_default_library",
         "//async/event:go_default_library",
         "//beacon-chain/blockchain:go_default_library",
+        "//beacon-chain/blockchain/kzg:go_default_library",
         "//beacon-chain/builder:go_default_library",
         "//beacon-chain/cache:go_default_library",
         "//beacon-chain/cache/depositsnapshot:go_default_library",
@@ -47,6 +50,7 @@ go_library(
         "//beacon-chain/core/feed/operation:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
@@ -180,7 +184,6 @@ common_deps = [
     "@org_golang_google_protobuf//types/known/emptypb:go_default_library",
 ]
 
-# gazelle:ignore
 go_test(
     name = "go_default_test",
     timeout = "moderate",

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

@@ -8,13 +8,18 @@ import (
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
+	"github.com/pkg/errors"
 	"google.golang.org/protobuf/proto"
 )
 
 // constructGenericBeaconBlock constructs a `GenericBeaconBlock` based on the block version and other parameters.
-func (vs *Server) constructGenericBeaconBlock(sBlk interfaces.SignedBeaconBlock, blobsBundle *enginev1.BlobsBundle, winningBid primitives.Wei) (*ethpb.GenericBeaconBlock, error) {
+func (vs *Server) constructGenericBeaconBlock(
+	sBlk interfaces.SignedBeaconBlock,
+	blobsBundler enginev1.BlobsBundler,
+	winningBid primitives.Wei,
+) (*ethpb.GenericBeaconBlock, error) {
 	if sBlk == nil || sBlk.Block() == nil {
-		return nil, fmt.Errorf("block cannot be nil")
+		return nil, errors.New("block cannot be nil")
 	}
 
 	blockProto, err := sBlk.Block().Proto()
@@ -34,12 +39,21 @@ func (vs *Server) constructGenericBeaconBlock(sBlk interfaces.SignedBeaconBlock,
 		return vs.constructBellatrixBlock(blockProto, isBlinded, bidStr), nil
 	case version.Capella:
 		return vs.constructCapellaBlock(blockProto, isBlinded, bidStr), nil
-	case version.Deneb:
-		return vs.constructDenebBlock(blockProto, isBlinded, bidStr, blobsBundle), nil
-	case version.Electra:
-		return vs.constructElectraBlock(blockProto, isBlinded, bidStr, blobsBundle), nil
+	case version.Deneb, version.Electra:
+		bundle, ok := blobsBundler.(*enginev1.BlobsBundle)
+		if blobsBundler != nil && !ok {
+			return nil, fmt.Errorf("expected *BlobsBundler, got %T", blobsBundler)
+		}
+		if sBlk.Version() == version.Deneb {
+			return vs.constructDenebBlock(blockProto, isBlinded, bidStr, bundle), nil
+		}
+		return vs.constructElectraBlock(blockProto, isBlinded, bidStr, bundle), nil
 	case version.Fulu:
-		return vs.constructFuluBlock(blockProto, isBlinded, bidStr, blobsBundle), nil
+		bundle, ok := blobsBundler.(*enginev1.BlobsBundleV2)
+		if blobsBundler != nil && !ok {
+			return nil, fmt.Errorf("expected *BlobsBundleV2, got %T", blobsBundler)
+		}
+		return vs.constructFuluBlock(blockProto, isBlinded, bidStr, bundle), nil
 	default:
 		return nil, fmt.Errorf("unknown block version: %d", sBlk.Version())
 	}
@@ -92,7 +106,7 @@ func (vs *Server) constructElectraBlock(blockProto proto.Message, isBlinded bool
 	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Electra{Electra: electraContents}, IsBlinded: false, PayloadValue: payloadValue}
 }
 
-func (vs *Server) constructFuluBlock(blockProto proto.Message, isBlinded bool, payloadValue string, bundle *enginev1.BlobsBundle) *ethpb.GenericBeaconBlock {
+func (vs *Server) constructFuluBlock(blockProto proto.Message, isBlinded bool, payloadValue string, bundle *enginev1.BlobsBundleV2) *ethpb.GenericBeaconBlock {
 	if isBlinded {
 		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedFulu{BlindedFulu: blockProto.(*ethpb.BlindedBeaconBlockFulu)}, IsBlinded: true, PayloadValue: payloadValue}
 	}

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

@@ -29,12 +29,19 @@ func TestConstructGenericBeaconBlock(t *testing.T) {
 		require.NoError(t, err)
 		r1, err := eb.Block.HashTreeRoot()
 		require.NoError(t, err)
-		result, err := vs.constructGenericBeaconBlock(b, nil, primitives.ZeroWei())
+		bundle := &enginev1.BlobsBundleV2{
+			KzgCommitments: [][]byte{{1, 2, 3}},
+			Proofs:         [][]byte{{4, 5, 6}},
+			Blobs:          [][]byte{{7, 8, 9}},
+		}
+		result, err := vs.constructGenericBeaconBlock(b, bundle, primitives.ZeroWei())
 		require.NoError(t, err)
 		r2, err := result.GetFulu().Block.HashTreeRoot()
 		require.NoError(t, err)
 		require.Equal(t, r1, r2)
 		require.Equal(t, result.IsBlinded, false)
+		require.DeepEqual(t, bundle.Blobs, result.GetFulu().GetBlobs())
+		require.DeepEqual(t, bundle.Proofs, result.GetFulu().GetKzgProofs())
 	})
 
 	// Test for Electra version

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

@@ -15,9 +15,13 @@ import (
 	blockfeed "github.com/OffchainLabs/prysm/v6/beacon-chain/core/feed/block"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/feed/operation"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
+	coreTime "github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/transition"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/kv"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
+	"github.com/OffchainLabs/prysm/v6/config/features"
+	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"
@@ -58,28 +62,31 @@ func (vs *Server) GetBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (
 	if err != nil {
 		log.WithError(err).Error("Could not convert slot to time")
 	}
-	log.WithFields(logrus.Fields{
-		"slot":               req.Slot,
-		"sinceSlotStartTime": time.Since(t),
-	}).Info("Begin building block")
+
+	log := log.WithField("slot", req.Slot)
+	log.WithField("sinceSlotStartTime", time.Since(t)).Info("Begin building block")
 
 	// A syncing validator should not produce a block.
 	if vs.SyncChecker.Syncing() {
+		log.Error("Fail to build block: node is syncing")
 		return nil, status.Error(codes.Unavailable, "Syncing to latest head, not ready to respond")
 	}
 	// An optimistic validator MUST NOT produce a block (i.e., sign across the DOMAIN_BEACON_PROPOSER domain).
 	if slots.ToEpoch(req.Slot) >= params.BeaconConfig().BellatrixForkEpoch {
 		if err := vs.optimisticStatus(ctx); err != nil {
+			log.WithError(err).Error("Fail to build block: node is optimistic")
 			return nil, status.Errorf(codes.Unavailable, "Validator is not ready to propose: %v", err)
 		}
 	}
 
 	head, parentRoot, err := vs.getParentState(ctx, req.Slot)
 	if err != nil {
+		log.WithError(err).Error("Fail to build block: could not get parent state")
 		return nil, err
 	}
 	sBlk, err := getEmptyBlock(req.Slot)
 	if err != nil {
+		log.WithError(err).Error("Fail to build block: could not get empty block")
 		return nil, status.Errorf(codes.Internal, "Could not prepare block: %v", err)
 	}
 	// Set slot, graffiti, randao reveal, and parent root.
@@ -91,6 +98,7 @@ func (vs *Server) GetBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (
 	// Set proposer index.
 	idx, err := helpers.BeaconProposerIndex(ctx, head)
 	if err != nil {
+		log.WithError(err).Error("Fail to build block: could not calculate proposer index")
 		return nil, fmt.Errorf("could not calculate proposer index %w", err)
 	}
 	sBlk.SetProposerIndex(idx)
@@ -101,7 +109,7 @@ func (vs *Server) GetBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (
 	}
 
 	resp, err := vs.BuildBlockParallel(ctx, sBlk, head, req.SkipMevBoost, builderBoostFactor)
-	log := log.WithFields(logrus.Fields{
+	log = log.WithFields(logrus.Fields{
 		"slot":               req.Slot,
 		"sinceSlotStartTime": time.Since(t),
 		"validator":          sBlk.Block().ProposerIndex(),
@@ -232,7 +240,7 @@ func (vs *Server) BuildBlockParallel(ctx context.Context, sBlk interfaces.Signed
 	}()
 
 	winningBid := primitives.ZeroWei()
-	var bundle *enginev1.BlobsBundle
+	var bundle enginev1.BlobsBundler
 	if sBlk.Version() >= version.Bellatrix {
 		local, err := vs.getLocalPayload(ctx, sBlk.Block(), head)
 		if err != nil {
@@ -274,7 +282,13 @@ func (vs *Server) BuildBlockParallel(ctx context.Context, sBlk interfaces.Signed
 // Deprecated: The gRPC API will remain the default and fully supported through v8 (expected in 2026) but will be eventually removed in favor of REST API.
 //
 // ProposeBeaconBlock handles the proposal of beacon blocks.
+// TODO: Add tests
 func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSignedBeaconBlock) (*ethpb.ProposeResponse, error) {
+	var (
+		blobSidecars       []*ethpb.BlobSidecar
+		dataColumnSideCars []*ethpb.DataColumnSidecar
+	)
+
 	ctx, span := trace.StartSpan(ctx, "ProposerServer.ProposeBeaconBlock")
 	defer span.End()
 
@@ -286,12 +300,12 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 	if err != nil {
 		return nil, status.Errorf(codes.InvalidArgument, "%s: %v", "decode block failed", err)
 	}
+	isPeerDASEnabled := coreTime.PeerDASIsActive(block.Block().Slot())
 
-	var sidecars []*ethpb.BlobSidecar
 	if block.IsBlinded() {
-		block, sidecars, err = vs.handleBlindedBlock(ctx, block)
+		block, blobSidecars, dataColumnSideCars, err = vs.handleBlindedBlock(ctx, block, isPeerDASEnabled)
 	} else if block.Version() >= version.Deneb {
-		sidecars, err = vs.blobSidecarsFromUnblindedBlock(block, req)
+		blobSidecars, dataColumnSideCars, err = vs.handleUnblindedBlock(block, req, isPeerDASEnabled)
 	}
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "%s: %v", "handle block failed", err)
@@ -302,9 +316,10 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 		return nil, status.Errorf(codes.Internal, "Could not hash tree root: %v", err)
 	}
 
+	slot := block.Block().Slot()
+
 	var wg sync.WaitGroup
 	errChan := make(chan error, 1)
-
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
@@ -315,8 +330,14 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 		errChan <- nil
 	}()
 
-	if err := vs.broadcastAndReceiveBlobs(ctx, sidecars, root); err != nil {
-		return nil, status.Errorf(codes.Internal, "Could not broadcast/receive blobs: %v", err)
+	if isPeerDASEnabled {
+		if err := vs.broadcastAndReceiveDataColumns(ctx, dataColumnSideCars, root, slot); err != nil {
+			return nil, status.Errorf(codes.Internal, "Could not broadcast/receive data columns: %v", err)
+		}
+	} else {
+		if err := vs.broadcastAndReceiveBlobs(ctx, blobSidecars, root); err != nil {
+			return nil, status.Errorf(codes.Internal, "Could not broadcast/receive blobs: %v", err)
+		}
 	}
 
 	wg.Wait()
@@ -328,46 +349,75 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 }
 
 // handleBlindedBlock processes blinded beacon blocks.
-func (vs *Server) handleBlindedBlock(ctx context.Context, block interfaces.SignedBeaconBlock) (interfaces.SignedBeaconBlock, []*ethpb.BlobSidecar, error) {
+func (vs *Server) handleBlindedBlock(ctx context.Context, block interfaces.SignedBeaconBlock, isPeerDASEnabled bool) (interfaces.SignedBeaconBlock, []*ethpb.BlobSidecar, []*ethpb.DataColumnSidecar, error) {
 	if block.Version() < version.Bellatrix {
-		return nil, nil, errors.New("pre-Bellatrix blinded block")
+		return nil, nil, nil, errors.New("pre-Bellatrix blinded block")
 	}
+
 	if vs.BlockBuilder == nil || !vs.BlockBuilder.Configured() {
-		return nil, nil, errors.New("unconfigured block builder")
+		return nil, nil, nil, errors.New("unconfigured block builder")
 	}
 
 	copiedBlock, err := block.Copy()
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, nil, errors.Wrap(err, "block copy")
 	}
 
 	payload, bundle, err := vs.BlockBuilder.SubmitBlindedBlock(ctx, block)
 	if err != nil {
-		return nil, nil, errors.Wrap(err, "submit blinded block failed")
+		return nil, nil, nil, errors.Wrap(err, "submit blinded block")
 	}
 
 	if err := copiedBlock.Unblind(payload); err != nil {
-		return nil, nil, errors.Wrap(err, "unblind failed")
+		return nil, nil, nil, errors.Wrap(err, "unblind")
 	}
 
-	sidecars, err := unblindBlobsSidecars(copiedBlock, bundle)
+	if isPeerDASEnabled {
+		dataColumnSideCars, err := peerdas.ConstructDataColumnSidecars(block, bundle.GetBlobs(), bundle.GetProofs())
+		if err != nil {
+			return nil, nil, nil, errors.Wrap(err, "construct data column sidecars")
+		}
+
+		return copiedBlock, nil, dataColumnSideCars, nil
+	}
+
+	blobSidecars, err := unblindBlobsSidecars(copiedBlock, bundle)
 	if err != nil {
-		return nil, nil, errors.Wrap(err, "unblind blobs sidecars: commitment value doesn't match block")
+		return nil, nil, nil, errors.Wrap(err, "unblind blobs sidecars: commitment value doesn't match block")
 	}
 
-	return copiedBlock, sidecars, nil
+	return copiedBlock, blobSidecars, nil, nil
 }
 
-func (vs *Server) blobSidecarsFromUnblindedBlock(block interfaces.SignedBeaconBlock, req *ethpb.GenericSignedBeaconBlock) ([]*ethpb.BlobSidecar, error) {
+func (vs *Server) handleUnblindedBlock(
+	block interfaces.SignedBeaconBlock,
+	req *ethpb.GenericSignedBeaconBlock,
+	isPeerDASEnabled bool,
+) ([]*ethpb.BlobSidecar, []*ethpb.DataColumnSidecar, error) {
 	rawBlobs, proofs, err := blobsAndProofs(req)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
-	return BuildBlobSidecars(block, rawBlobs, proofs)
+
+	if isPeerDASEnabled {
+		dataColumnSideCars, err := peerdas.ConstructDataColumnSidecars(block, rawBlobs, proofs)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "construct data column sidecars")
+		}
+
+		return nil, dataColumnSideCars, nil
+	}
+
+	blobSidecars, err := BuildBlobSidecars(block, rawBlobs, proofs)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "build blob sidecars")
+	}
+
+	return blobSidecars, nil, nil
 }
 
 // broadcastReceiveBlock broadcasts a block and handles its reception.
-func (vs *Server) broadcastReceiveBlock(ctx context.Context, block interfaces.SignedBeaconBlock, root [32]byte) error {
+func (vs *Server) broadcastReceiveBlock(ctx context.Context, block interfaces.SignedBeaconBlock, root [fieldparams.RootLength]byte) error {
 	protoBlock, err := block.Proto()
 	if err != nil {
 		return errors.Wrap(err, "protobuf conversion failed")
@@ -383,7 +433,7 @@ func (vs *Server) broadcastReceiveBlock(ctx context.Context, block interfaces.Si
 }
 
 // broadcastAndReceiveBlobs handles the broadcasting and reception of blob sidecars.
-func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethpb.BlobSidecar, root [32]byte) error {
+func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethpb.BlobSidecar, root [fieldparams.RootLength]byte) error {
 	eg, eCtx := errgroup.WithContext(ctx)
 	for i, sc := range sidecars {
 		// Copy the iteration instance to a local variable to give each go-routine its own copy to play with.
@@ -412,6 +462,69 @@ func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethp
 	return eg.Wait()
 }
 
+// broadcastAndReceiveDataColumns handles the broadcasting and reception of data columns sidecars.
+func (vs *Server) broadcastAndReceiveDataColumns(
+	ctx context.Context,
+	sidecars []*ethpb.DataColumnSidecar,
+	root [fieldparams.RootLength]byte,
+	slot primitives.Slot,
+) error {
+	dataColumnsWithholdCount := features.Get().DataColumnsWithholdCount
+	verifiedRODataColumns := make([]blocks.VerifiedRODataColumn, 0, len(sidecars))
+
+	eg, _ := errgroup.WithContext(ctx)
+	for _, sd := range sidecars {
+		roDataColumn, err := blocks.NewRODataColumnWithRoot(sd, root)
+		if err != nil {
+			return errors.Wrap(err, "new read-only data column with root")
+		}
+
+		// We build this block ourselves, so we can upgrade the read only data column sidecar into a verified one.
+		verifiedRODataColumn := blocks.NewVerifiedRODataColumn(roDataColumn)
+		verifiedRODataColumns = append(verifiedRODataColumns, verifiedRODataColumn)
+
+		// Copy the iteration instance to a local variable to give each go-routine its own copy to play with.
+		// See https://golang.org/doc/faq#closures_and_goroutines for more details.
+		sidecar := sd
+		eg.Go(func() error {
+			if sidecar.Index < dataColumnsWithholdCount {
+				log.WithFields(logrus.Fields{
+					"root":  fmt.Sprintf("%#x", root),
+					"slot":  slot,
+					"index": sidecar.Index,
+				}).Warning("Withholding data column")
+
+				return nil
+			}
+
+			// Compute the subnet index based on the column index.
+			subnet := peerdas.ComputeSubnetForDataColumnSidecar(sidecar.Index)
+
+			if err := vs.P2P.BroadcastDataColumn(root, subnet, sidecar); err != nil {
+				return errors.Wrap(err, "broadcast data column")
+			}
+
+			return nil
+		})
+	}
+
+	if err := eg.Wait(); err != nil {
+		return errors.Wrap(err, "wait for data columns to be broadcasted")
+	}
+
+	if err := vs.DataColumnReceiver.ReceiveDataColumns(verifiedRODataColumns); err != nil {
+		return errors.Wrap(err, "receive data column")
+	}
+
+	for _, verifiedRODataColumn := range verifiedRODataColumns {
+		vs.OperationNotifier.OperationFeed().Send(&feed.Event{
+			Type: operation.DataColumnSidecarReceived,
+			Data: &operation.DataColumnSidecarReceivedData{DataColumn: &verifiedRODataColumn}, // #nosec G601
+		})
+	}
+	return nil
+}
+
 // Deprecated: The gRPC API will remain the default and fully supported through v8 (expected in 2026) but will be eventually removed in favor of REST API.
 //
 // PrepareBeaconProposer caches and updates the fee recipient for the given proposer.