add gopkgdriver implementation (genception)

* Add data column sidecars proto.

* Fix Terence's comment.

* Re-add everything.

CHANGELOG.md

@@ -8,16 +8,25 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 
 ### Added
 
-- Electra EIP6110: Queue deposit [pr](https://github.com/prysmaticlabs/prysm/pull/14430)
+- Electra EIP6110: Queue deposit [pr](https://github.com/prysmaticlabs/prysm/pull/14430).
 - Add Bellatrix tests for light client functions.
 - Add Discovery Rebooter Feature.
 - Added GetBlockAttestationsV2 endpoint.
-- Light client support: Consensus types for Electra
+- Light client support: Consensus types for Electra.
 - Added SubmitPoolAttesterSlashingV2 endpoint.
 - Added SubmitAggregateAndProofsRequestV2 endpoint.
 - Updated the `beacon-chain/monitor` package to Electra. [PR](https://github.com/prysmaticlabs/prysm/pull/14562)
 - Added ListAttestationsV2 endpoint.
 - Add ability to rollback node's internal state during processing.
+- Change how unsafe protobuf state is created to prevent unnecessary copies.
+- Added benchmarks for process slots for Capella, Deneb, Electra.
+- Add helper to cast bytes to string without allocating memory.
+- Added GetAggregatedAttestationV2 endpoint.
+- Added SubmitAttestationsV2 endpoint.
+- Validator REST mode Electra block support.
+- Added validator index label to `validator_statuses` metric.
+- Added Validator REST mode use of Attestation V2 endpoints and Electra attestations.
+- PeerDAS: Added proto for `DataColumnIdentifier`, `DataColumnSidecar`, `DataColumnSidecarsByRangeRequest` and `MetadataV2`.
 
 ### Changed
 
@@ -39,9 +48,19 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - Simplified `ExitedValidatorIndices`.
 - Simplified `EjectedValidatorIndices`.
 - `engine_newPayloadV4`,`engine_getPayloadV4` are changes due to new execution request serialization decisions, [PR](https://github.com/prysmaticlabs/prysm/pull/14580)
+- Fixed various small things in state-native code.
 - Use ROBlock earlier in block syncing pipeline. 
-- Changed the signature of `ProcessPayload` 
-- Only Build the Protobuf state once during serialization
+- Changed the signature of `ProcessPayload`.
+- Only Build the Protobuf state once during serialization.
+- Capella blocks are execution.
+- Fixed panic when http request to subscribe to event stream fails.
+- Return early for blob reconstructor during capella fork.
+- Updated block endpoint from V1 to V2.
+- Rename instances of "deposit receipts" to "deposit requests".
+- Non-blocking payload attribute event handling in beacon api [pr](https://github.com/prysmaticlabs/prysm/pull/14644).
+- Updated light client protobufs. [PR](https://github.com/prysmaticlabs/prysm/pull/14650)
+- Added `Eth-Consensus-Version` header to `ListAttestationsV2` and `GetAggregateAttestationV2` endpoints.
+- Updated light client consensus types. [PR](https://github.com/prysmaticlabs/prysm/pull/14652)
 
 ### Deprecated
 
@@ -51,6 +70,7 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 
 - Removed finalized validator index cache, no longer needed.
 - Removed validator queue position log on key reload and wait for activation.
+- Removed outdated spectest exclusions for EIP-6110.
 
 ### Fixed
 
@@ -65,6 +85,11 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - Fix keymanager API so that get keys returns an empty response instead of a 500 error when using an unsupported keystore.
 - Small log imporvement, removing some redundant or duplicate logs
 - EIP7521 - Fixes withdrawal bug by accounting for pending partial withdrawals and deducting already withdrawn amounts from the sweep balance. [PR](https://github.com/prysmaticlabs/prysm/pull/14578)
+- unskip electra merkle spec test
+- Fix panic in validator REST mode when checking status after removing all keys
+- Fix panic on attestation interface since we call data before validation
+- corrects nil check on some interface attestation types
+- temporary solution to handling electra attesation and attester_slashing events. [pr](14655)
 
 
 ### Security
@@ -179,6 +204,7 @@ Updating to this release is recommended at your convenience.
 - Light client support: fix light client attested header execution fields' wrong version bug.
 - Testing: added custom matcher for better push settings testing.
 - Registered `GetDepositSnapshot` Beacon API endpoint.
+- Fix rolling back of a block due to a context deadline.
 
 ### Security
 

api/client/event/event_stream.go

@@ -93,6 +93,7 @@ func (h *EventStream) Subscribe(eventsChannel chan<- *Event) {
 			EventType: EventConnectionError,
 			Data:      []byte(errors.Wrap(err, client.ErrConnectionIssue.Error()).Error()),
 		}
+		return
 	}
 
 	defer func() {

api/client/event/event_stream_test.go

@@ -40,7 +40,7 @@ func TestNewEventStream(t *testing.T) {
 
 func TestEventStream(t *testing.T) {
 	mux := http.NewServeMux()
-	mux.HandleFunc("/eth/v1/events", func(w http.ResponseWriter, r *http.Request) {
+	mux.HandleFunc("/eth/v1/events", func(w http.ResponseWriter, _ *http.Request) {
 		flusher, ok := w.(http.Flusher)
 		require.Equal(t, true, ok)
 		for i := 1; i <= 3; i++ {
@@ -79,3 +79,23 @@ func TestEventStream(t *testing.T) {
 		}
 	}
 }
+
+func TestEventStreamRequestError(t *testing.T) {
+	topics := []string{"head"}
+	eventsChannel := make(chan *Event, 1)
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	// use valid url that will result in failed request with nil body
+	stream, err := NewEventStream(ctx, http.DefaultClient, "http://badhost:1234", topics)
+	require.NoError(t, err)
+
+	// error will happen when request is made, should be received over events channel
+	go stream.Subscribe(eventsChannel)
+
+	event := <-eventsChannel
+	if event.EventType != EventConnectionError {
+		t.Errorf("Expected event type %q, got %q", EventConnectionError, event.EventType)
+	}
+
+}

api/server/structs/endpoints_beacon.go

@@ -26,7 +26,7 @@ type ListAttestationsResponse struct {
 }
 
 type SubmitAttestationsRequest struct {
-	Data []*Attestation `json:"data"`
+	Data json.RawMessage `json:"data"`
 }
 
 type ListVoluntaryExitsResponse struct {

api/server/structs/endpoints_validator.go

@@ -7,7 +7,8 @@ import (
 )
 
 type AggregateAttestationResponse struct {
-	Data *Attestation `json:"data"`
+	Version string          `json:"version,omitempty"`
+	Data    json.RawMessage `json:"data"`
 }
 
 type SubmitContributionAndProofsRequest struct {

beacon-chain/blockchain/execution_engine.go

@@ -6,8 +6,11 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/async/event"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
+	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
@@ -69,6 +72,7 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *fcuConfig) (*
 	if arg.attributes == nil {
 		arg.attributes = payloadattribute.EmptyWithVersion(headBlk.Version())
 	}
+	go firePayloadAttributesEvent(ctx, s.cfg.StateNotifier.StateFeed(), arg)
 	payloadID, lastValidHash, err := s.cfg.ExecutionEngineCaller.ForkchoiceUpdated(ctx, fcs, arg.attributes)
 	if err != nil {
 		switch {
@@ -167,6 +171,38 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *fcuConfig) (*
 	return payloadID, nil
 }
 
+func firePayloadAttributesEvent(ctx context.Context, f event.SubscriberSender, cfg *fcuConfig) {
+	pidx, err := helpers.BeaconProposerIndex(ctx, cfg.headState)
+	if err != nil {
+		log.WithError(err).
+			WithField("head_root", cfg.headRoot[:]).
+			Error("Could not get proposer index for PayloadAttributes event")
+		return
+	}
+	evd := payloadattribute.EventData{
+		ProposerIndex:   pidx,
+		ProposalSlot:    cfg.headState.Slot(),
+		ParentBlockRoot: cfg.headRoot[:],
+		Attributer:      cfg.attributes,
+		HeadRoot:        cfg.headRoot,
+		HeadState:       cfg.headState,
+		HeadBlock:       cfg.headBlock,
+	}
+	if cfg.headBlock != nil && !cfg.headBlock.IsNil() {
+		headPayload, err := cfg.headBlock.Block().Body().Execution()
+		if err != nil {
+			log.WithError(err).Error("Could not get execution payload for head block")
+			return
+		}
+		evd.ParentBlockHash = headPayload.BlockHash()
+		evd.ParentBlockNumber = headPayload.BlockNumber()
+	}
+	f.Send(&feed.Event{
+		Type: statefeed.PayloadAttributes,
+		Data: evd,
+	})
+}
+
 // getPayloadHash returns the payload hash given the block root.
 // if the block is before bellatrix fork epoch, it returns the zero hash.
 func (s *Service) getPayloadHash(ctx context.Context, root []byte) ([32]byte, error) {

beacon-chain/blockchain/process_attestation_test.go

@@ -92,12 +92,12 @@ func TestStore_OnAttestation_ErrorConditions(t *testing.T) {
 		{
 			name:      "process nil attestation",
 			a:         nil,
-			wantedErr: "attestation can't be nil",
+			wantedErr: "attestation is nil",
 		},
 		{
 			name:      "process nil field (a.Data) in attestation",
 			a:         &ethpb.Attestation{},
-			wantedErr: "attestation's data can't be nil",
+			wantedErr: "attestation is nil",
 		},
 		{
 			name: "process nil field (a.Target) in attestation",

beacon-chain/blockchain/process_block.go

@@ -7,8 +7,6 @@ import (
 
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	coreTime "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
@@ -76,6 +74,8 @@ func (s *Service) postBlockProcess(cfg *postBlockProcessConfig) error {
 
 	err := s.cfg.ForkChoiceStore.InsertNode(ctx, cfg.postState, cfg.roblock)
 	if err != nil {
+		// Do not use parent context in the event it deadlined
+		ctx = trace.NewContext(context.Background(), span)
 		s.rollbackBlock(ctx, cfg.roblock.Root())
 		return errors.Wrapf(err, "could not insert block %d to fork choice store", cfg.roblock.Block().Slot())
 	}
@@ -618,9 +618,6 @@ func (s *Service) lateBlockTasks(ctx context.Context) {
 	if !s.inRegularSync() {
 		return
 	}
-	s.cfg.StateNotifier.StateFeed().Send(&feed.Event{
-		Type: statefeed.MissedSlot,
-	})
 	s.headLock.RLock()
 	headRoot := s.headRoot()
 	headState := s.headState(ctx)
@@ -648,6 +645,13 @@ func (s *Service) lateBlockTasks(ctx context.Context) {
 	attribute := s.getPayloadAttribute(ctx, headState, s.CurrentSlot()+1, headRoot[:])
 	// return early if we are not proposing next slot
 	if attribute.IsEmpty() {
+		fcuArgs := &fcuConfig{
+			headState:  headState,
+			headRoot:   headRoot,
+			headBlock:  nil,
+			attributes: attribute,
+		}
+		go firePayloadAttributesEvent(ctx, s.cfg.StateNotifier.StateFeed(), fcuArgs)
 		return
 	}
 

beacon-chain/blockchain/process_block_test.go

@@ -2352,6 +2352,85 @@ func TestRollbackBlock(t *testing.T) {
 	require.Equal(t, false, hasState)
 }
 
+func TestRollbackBlock_ContextDeadline(t *testing.T) {
+	service, tr := minimalTestService(t)
+	ctx := tr.ctx
+
+	st, keys := util.DeterministicGenesisState(t, 64)
+	stateRoot, err := st.HashTreeRoot(ctx)
+	require.NoError(t, err, "Could not hash genesis state")
+
+	require.NoError(t, service.saveGenesisData(ctx, st))
+
+	genesis := blocks.NewGenesisBlock(stateRoot[:])
+	wsb, err := consensusblocks.NewSignedBeaconBlock(genesis)
+	require.NoError(t, err)
+	require.NoError(t, service.cfg.BeaconDB.SaveBlock(ctx, wsb), "Could not save genesis block")
+	parentRoot, err := genesis.Block.HashTreeRoot()
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, st, parentRoot), "Could not save genesis state")
+	require.NoError(t, service.cfg.BeaconDB.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
+	require.NoError(t, service.cfg.BeaconDB.SaveJustifiedCheckpoint(ctx, &ethpb.Checkpoint{Root: parentRoot[:]}))
+	require.NoError(t, service.cfg.BeaconDB.SaveFinalizedCheckpoint(ctx, &ethpb.Checkpoint{Root: parentRoot[:]}))
+
+	st, err = service.HeadState(ctx)
+	require.NoError(t, err)
+	b, err := util.GenerateFullBlock(st, keys, util.DefaultBlockGenConfig(), 33)
+	require.NoError(t, err)
+	wsb, err = consensusblocks.NewSignedBeaconBlock(b)
+	require.NoError(t, err)
+	root, err := b.Block.HashTreeRoot()
+	require.NoError(t, err)
+	preState, err := service.getBlockPreState(ctx, wsb.Block())
+	require.NoError(t, err)
+	postState, err := service.validateStateTransition(ctx, preState, wsb)
+	require.NoError(t, err)
+	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
+	roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
+	require.NoError(t, err)
+	require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+
+	b, err = util.GenerateFullBlock(postState, keys, util.DefaultBlockGenConfig(), 34)
+	require.NoError(t, err)
+	wsb, err = consensusblocks.NewSignedBeaconBlock(b)
+	require.NoError(t, err)
+	root, err = b.Block.HashTreeRoot()
+	require.NoError(t, err)
+	preState, err = service.getBlockPreState(ctx, wsb.Block())
+	require.NoError(t, err)
+	postState, err = service.validateStateTransition(ctx, preState, wsb)
+	require.NoError(t, err)
+	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
+
+	require.Equal(t, true, service.cfg.BeaconDB.HasBlock(ctx, root))
+	hasState, err := service.cfg.StateGen.HasState(ctx, root)
+	require.NoError(t, err)
+	require.Equal(t, true, hasState)
+
+	// Set deadlined context when processing the block
+	cancCtx, canc := context.WithCancel(context.Background())
+	canc()
+	roblock, err = consensusblocks.NewROBlockWithRoot(wsb, root)
+	require.NoError(t, err)
+
+	parentRoot = roblock.Block().ParentRoot()
+
+	cj := &ethpb.Checkpoint{}
+	cj.Epoch = 1
+	cj.Root = parentRoot[:]
+	require.NoError(t, postState.SetCurrentJustifiedCheckpoint(cj))
+	require.NoError(t, postState.SetFinalizedCheckpoint(cj))
+
+	// Rollback block insertion into db and caches.
+	require.ErrorContains(t, "context canceled", service.postBlockProcess(&postBlockProcessConfig{cancCtx, roblock, [32]byte{}, postState, false}))
+
+	// The block should no longer exist.
+	require.Equal(t, false, service.cfg.BeaconDB.HasBlock(ctx, root))
+	hasState, err = service.cfg.StateGen.HasState(ctx, root)
+	require.NoError(t, err)
+	require.Equal(t, false, hasState)
+}
+
 func fakeCommitments(n int) [][]byte {
 	f := make([][]byte, n)
 	for i := range f {

beacon-chain/core/blocks/attestation_test.go

@@ -448,6 +448,7 @@ func TestValidateIndexedAttestation_AboveMaxLength(t *testing.T) {
 			Target: &ethpb.Checkpoint{
 				Epoch: primitives.Epoch(i),
 			},
+			Source: &ethpb.Checkpoint{},
 		}
 	}
 
@@ -489,6 +490,7 @@ func TestValidateIndexedAttestation_BadAttestationsSignatureSet(t *testing.T) {
 				Target: &ethpb.Checkpoint{
 					Root: []byte{},
 				},
+				Source: &ethpb.Checkpoint{},
 			},
 			Signature:       sig.Marshal(),
 			AggregationBits: list,

beacon-chain/core/blocks/payload.go

@@ -61,6 +61,9 @@ func IsExecutionBlock(body interfaces.ReadOnlyBeaconBlockBody) (bool, error) {
 	if body == nil {
 		return false, errors.New("nil block body")
 	}
+	if body.Version() >= version.Capella {
+		return true, nil
+	}
 	payload, err := body.Execution()
 	switch {
 	case errors.Is(err, consensus_types.ErrUnsupportedField):

beacon-chain/core/blocks/payload_test.go

@@ -253,7 +253,8 @@ func Test_IsExecutionBlockCapella(t *testing.T) {
 	require.NoError(t, err)
 	got, err := blocks.IsExecutionBlock(wrappedBlock.Body())
 	require.NoError(t, err)
-	require.Equal(t, false, got)
+	// #14614
+	require.Equal(t, true, got)
 }
 
 func Test_IsExecutionEnabled(t *testing.T) {

beacon-chain/core/blocks/withdrawals.go

@@ -193,7 +193,7 @@ func ProcessWithdrawals(st state.BeaconState, executionData interfaces.Execution
 	}
 
 	if st.Version() >= version.Electra {
-		if err := st.DequeuePartialWithdrawals(processedPartialWithdrawalsCount); err != nil {
+		if err := st.DequeuePendingPartialWithdrawals(processedPartialWithdrawalsCount); err != nil {
 			return nil, fmt.Errorf("unable to dequeue partial withdrawals from state: %w", err)
 		}
 	}

beacon-chain/core/electra/deposits.go

@@ -560,7 +560,7 @@ func ProcessDepositRequests(ctx context.Context, beaconState state.BeaconState,
 	return beaconState, nil
 }
 
-// processDepositRequest processes the specific deposit receipt
+// processDepositRequest processes the specific deposit request
 // def process_deposit_request(state: BeaconState, deposit_request: DepositRequest) -> None:
 //
 //	# Set deposit request start index
@@ -590,8 +590,8 @@ func processDepositRequest(beaconState state.BeaconState, request *enginev1.Depo
 	}
 	if err := beaconState.AppendPendingDeposit(&ethpb.PendingDeposit{
 		PublicKey:             bytesutil.SafeCopyBytes(request.Pubkey),
-		Amount:                request.Amount,
 		WithdrawalCredentials: bytesutil.SafeCopyBytes(request.WithdrawalCredentials),
+		Amount:                request.Amount,
 		Signature:             bytesutil.SafeCopyBytes(request.Signature),
 		Slot:                  beaconState.Slot(),
 	}); err != nil {

beacon-chain/core/electra/transition.go

@@ -29,7 +29,6 @@ var (
 	ProcessParticipationFlagUpdates      = altair.ProcessParticipationFlagUpdates
 	ProcessSyncCommitteeUpdates          = altair.ProcessSyncCommitteeUpdates
 	AttestationsDelta                    = altair.AttestationsDelta
-	ProcessSyncAggregate                 = altair.ProcessSyncAggregate
 )
 
 // ProcessEpoch describes the per epoch operations that are performed on the beacon state.

beacon-chain/core/electra/transition_no_verify_sig.go

@@ -84,11 +84,11 @@ func ProcessOperations(
 	}
 	st, err = ProcessDepositRequests(ctx, st, requests.Deposits)
 	if err != nil {
-		return nil, errors.Wrap(err, "could not process deposit receipts")
+		return nil, errors.Wrap(err, "could not process deposit requests")
 	}
 	st, err = ProcessWithdrawalRequests(ctx, st, requests.Withdrawals)
 	if err != nil {
-		return nil, errors.Wrap(err, "could not process execution layer withdrawal requests")
+		return nil, errors.Wrap(err, "could not process withdrawal requests")
 	}
 	if err := ProcessConsolidationRequests(ctx, st, requests.Consolidations); err != nil {
 		return nil, fmt.Errorf("could not process consolidation requests: %w", err)

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

@@ -31,6 +31,8 @@ const (
 	LightClientFinalityUpdate
 	// LightClientOptimisticUpdate event
 	LightClientOptimisticUpdate
+	// PayloadAttributes events are fired upon a missed slot or new head.
+	PayloadAttributes
 )
 
 // BlockProcessedData is the data sent with BlockProcessed events.

beacon-chain/core/helpers/attestation.go

@@ -23,11 +23,8 @@ var (
 // Access to these nil fields will result in run time panic,
 // it is recommended to run these checks as first line of defense.
 func ValidateNilAttestation(attestation ethpb.Att) error {
-	if attestation == nil {
-		return errors.New("attestation can't be nil")
-	}
-	if attestation.GetData() == nil {
-		return errors.New("attestation's data can't be nil")
+	if attestation == nil || attestation.IsNil() {
+		return errors.New("attestation is nil")
 	}
 	if attestation.GetData().Source == nil {
 		return errors.New("attestation's source can't be nil")

beacon-chain/core/helpers/attestation_test.go

@@ -260,12 +260,12 @@ func TestValidateNilAttestation(t *testing.T) {
 		{
 			name:        "nil attestation",
 			attestation: nil,
-			errString:   "attestation can't be nil",
+			errString:   "attestation is nil",
 		},
 		{
 			name:        "nil attestation data",
 			attestation: &ethpb.Attestation{},
-			errString:   "attestation's data can't be nil",
+			errString:   "attestation is nil",
 		},
 		{
 			name: "nil attestation source",

beacon-chain/core/transition/transition_test.go

@@ -698,3 +698,45 @@ func TestProcessSlotsConditionally(t *testing.T) {
 		assert.Equal(t, primitives.Slot(6), s.Slot())
 	})
 }
+
+func BenchmarkProcessSlots_Capella(b *testing.B) {
+	st, _ := util.DeterministicGenesisStateCapella(b, params.BeaconConfig().MaxValidatorsPerCommittee)
+
+	var err error
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		st, err = transition.ProcessSlots(context.Background(), st, st.Slot()+1)
+		if err != nil {
+			b.Fatalf("Failed to process slot %v", err)
+		}
+	}
+}
+
+func BenchmarkProcessSlots_Deneb(b *testing.B) {
+	st, _ := util.DeterministicGenesisStateDeneb(b, params.BeaconConfig().MaxValidatorsPerCommittee)
+
+	var err error
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		st, err = transition.ProcessSlots(context.Background(), st, st.Slot()+1)
+		if err != nil {
+			b.Fatalf("Failed to process slot %v", err)
+		}
+	}
+}
+
+func BenchmarkProcessSlots_Electra(b *testing.B) {
+	st, _ := util.DeterministicGenesisStateElectra(b, params.BeaconConfig().MaxValidatorsPerCommittee)
+
+	var err error
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		st, err = transition.ProcessSlots(context.Background(), st, st.Slot()+1)
+		if err != nil {
+			b.Fatalf("Failed to process slot %v", err)
+		}
+	}
+}

beacon-chain/db/slasherkv/slasher.go

@@ -688,7 +688,7 @@ func decodeSlasherChunk(enc []byte) ([]uint16, error) {
 // Encode attestation record to bytes.
 // The output encoded attestation record consists in the signing root concatenated with the compressed attestation record.
 func encodeAttestationRecord(att *slashertypes.IndexedAttestationWrapper) ([]byte, error) {
-	if att == nil || att.IndexedAttestation == nil {
+	if att == nil || att.IndexedAttestation == nil || att.IndexedAttestation.IsNil() {
 		return []byte{}, errors.New("nil proposal record")
 	}
 

beacon-chain/node/node.go

@@ -192,20 +192,13 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 	beacon.verifyInitWaiter = verification.NewInitializerWaiter(
 		beacon.clockWaiter, forkchoice.NewROForkChoice(beacon.forkChoicer), beacon.stateGen)
 
-	pa := peers.NewAssigner(beacon.fetchP2P().Peers(), beacon.forkChoicer)
-
 	beacon.BackfillOpts = append(
 		beacon.BackfillOpts,
 		backfill.WithVerifierWaiter(beacon.verifyInitWaiter),
 		backfill.WithInitSyncWaiter(initSyncWaiter(ctx, beacon.initialSyncComplete)),
 	)
 
-	bf, err := backfill.NewService(ctx, bfs, beacon.BlobStorage, beacon.clockWaiter, beacon.fetchP2P(), pa, beacon.BackfillOpts...)
-	if err != nil {
-		return nil, errors.Wrap(err, "error initializing backfill service")
-	}
-
-	if err := registerServices(cliCtx, beacon, synchronizer, bf, bfs); err != nil {
+	if err := registerServices(cliCtx, beacon, synchronizer, bfs); err != nil {
 		return nil, errors.Wrap(err, "could not register services")
 	}
 
@@ -292,11 +285,6 @@ func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress s
 		return nil, errors.Wrap(err, "could not start slashing DB")
 	}
 
-	log.Debugln("Registering P2P Service")
-	if err := beacon.registerP2P(cliCtx); err != nil {
-		return nil, errors.Wrap(err, "could not register P2P service")
-	}
-
 	bfs, err := backfill.NewUpdater(ctx, beacon.db)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not create backfill updater")
@@ -315,9 +303,15 @@ func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress s
 	return bfs, nil
 }
 
-func registerServices(cliCtx *cli.Context, beacon *BeaconNode, synchronizer *startup.ClockSynchronizer, bf *backfill.Service, bfs *backfill.Store) error {
-	if err := beacon.services.RegisterService(bf); err != nil {
-		return errors.Wrap(err, "could not register backfill service")
+func registerServices(cliCtx *cli.Context, beacon *BeaconNode, synchronizer *startup.ClockSynchronizer, bfs *backfill.Store) error {
+	log.Debugln("Registering P2P Service")
+	if err := beacon.registerP2P(cliCtx); err != nil {
+		return errors.Wrap(err, "could not register P2P service")
+	}
+
+	log.Debugln("Registering Backfill Service")
+	if err := beacon.RegisterBackfillService(cliCtx, bfs); err != nil {
+		return errors.Wrap(err, "could not register Back Fill service")
 	}
 
 	log.Debugln("Registering POW Chain Service")
@@ -1136,6 +1130,16 @@ func (b *BeaconNode) registerBuilderService(cliCtx *cli.Context) error {
 	return b.services.RegisterService(svc)
 }
 
+func (b *BeaconNode) RegisterBackfillService(cliCtx *cli.Context, bfs *backfill.Store) error {
+	pa := peers.NewAssigner(b.fetchP2P().Peers(), b.forkChoicer)
+	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")
+	}
+
+	return b.services.RegisterService(bf)
+}
+
 func hasNetworkFlag(cliCtx *cli.Context) bool {
 	for _, flag := range features.NetworkFlags {
 		for _, name := range flag.Names() {

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

@@ -49,12 +49,12 @@ func TestKV_Aggregated_SaveAggregatedAttestation(t *testing.T) {
 		{
 			name:          "nil attestation",
 			att:           nil,
-			wantErrString: "attestation can't be nil",
+			wantErrString: "attestation is nil",
 		},
 		{
 			name:          "nil attestation data",
 			att:           &ethpb.Attestation{},
-			wantErrString: "attestation's data can't be nil",
+			wantErrString: "attestation is nil",
 		},
 		{
 			name: "not aggregated",
@@ -206,7 +206,7 @@ func TestKV_Aggregated_AggregatedAttestations(t *testing.T) {
 func TestKV_Aggregated_DeleteAggregatedAttestation(t *testing.T) {
 	t.Run("nil attestation", func(t *testing.T) {
 		cache := NewAttCaches()
-		assert.ErrorContains(t, "attestation can't be nil", cache.DeleteAggregatedAttestation(nil))
+		assert.ErrorContains(t, "attestation is nil", cache.DeleteAggregatedAttestation(nil))
 		att := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b10101}, Data: &ethpb.AttestationData{Slot: 2}})
 		assert.NoError(t, cache.DeleteAggregatedAttestation(att))
 	})
@@ -288,7 +288,7 @@ func TestKV_Aggregated_HasAggregatedAttestation(t *testing.T) {
 			name:  "nil attestation",
 			input: nil,
 			want:  false,
-			err:   errors.New("can't be nil"),
+			err:   errors.New("is nil"),
 		},
 		{
 			name: "nil attestation data",
@@ -296,7 +296,7 @@ func TestKV_Aggregated_HasAggregatedAttestation(t *testing.T) {
 				AggregationBits: bitfield.Bitlist{0b1111},
 			},
 			want: false,
-			err:  errors.New("can't be nil"),
+			err:  errors.New("is nil"),
 		},
 		{
 			name: "empty cache aggregated",

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

@@ -8,7 +8,7 @@ import (
 
 // SaveBlockAttestation saves an block attestation in cache.
 func (c *AttCaches) SaveBlockAttestation(att ethpb.Att) error {
-	if att == nil {
+	if att == nil || att.IsNil() {
 		return nil
 	}
 
@@ -53,10 +53,9 @@ func (c *AttCaches) BlockAttestations() []ethpb.Att {
 
 // DeleteBlockAttestation deletes a block attestation in cache.
 func (c *AttCaches) DeleteBlockAttestation(att ethpb.Att) error {
-	if att == nil {
+	if att == nil || att.IsNil() {
 		return nil
 	}
-
 	id, err := attestation.NewId(att, attestation.Data)
 	if err != nil {
 		return errors.Wrap(err, "could not create attestation ID")

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

@@ -8,7 +8,7 @@ import (
 
 // SaveForkchoiceAttestation saves an forkchoice attestation in cache.
 func (c *AttCaches) SaveForkchoiceAttestation(att ethpb.Att) error {
-	if att == nil {
+	if att == nil || att.IsNil() {
 		return nil
 	}
 
@@ -50,7 +50,7 @@ func (c *AttCaches) ForkchoiceAttestations() []ethpb.Att {
 
 // DeleteForkchoiceAttestation deletes a forkchoice attestation in cache.
 func (c *AttCaches) DeleteForkchoiceAttestation(att ethpb.Att) error {
-	if att == nil {
+	if att == nil || att.IsNil() {
 		return nil
 	}
 

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

@@ -14,7 +14,7 @@ import (
 
 // SaveUnaggregatedAttestation saves an unaggregated attestation in cache.
 func (c *AttCaches) SaveUnaggregatedAttestation(att ethpb.Att) error {
-	if att == nil {
+	if att == nil || att.IsNil() {
 		return nil
 	}
 	if helpers.IsAggregated(att) {
@@ -130,9 +130,10 @@ func (c *AttCaches) UnaggregatedAttestationsBySlotIndexElectra(
 
 // DeleteUnaggregatedAttestation deletes the unaggregated attestations in cache.
 func (c *AttCaches) DeleteUnaggregatedAttestation(att ethpb.Att) error {
-	if att == nil {
+	if att == nil || att.IsNil() {
 		return nil
 	}
+
 	if helpers.IsAggregated(att) {
 		return errors.New("attestation is aggregated")
 	}
@@ -161,7 +162,7 @@ func (c *AttCaches) DeleteSeenUnaggregatedAttestations() (int, error) {
 
 	count := 0
 	for r, att := range c.unAggregatedAtt {
-		if att == nil || helpers.IsAggregated(att) {
+		if att == nil || att.IsNil() || helpers.IsAggregated(att) {
 			continue
 		}
 		if seen, err := c.hasSeenBit(att); err == nil && seen {

beacon-chain/p2p/message_id.go

@@ -29,7 +29,7 @@ func MsgID(genesisValidatorsRoot []byte, pmsg *pubsubpb.Message) string {
 		// never be hit.
 		msg := make([]byte, 20)
 		copy(msg, "invalid")
-		return string(msg)
+		return bytesutil.UnsafeCastToString(msg)
 	}
 	digest, err := ExtractGossipDigest(*pmsg.Topic)
 	if err != nil {
@@ -37,7 +37,7 @@ func MsgID(genesisValidatorsRoot []byte, pmsg *pubsubpb.Message) string {
 		// never be hit.
 		msg := make([]byte, 20)
 		copy(msg, "invalid")
-		return string(msg)
+		return bytesutil.UnsafeCastToString(msg)
 	}
 	_, fEpoch, err := forks.RetrieveForkDataFromDigest(digest, genesisValidatorsRoot)
 	if err != nil {
@@ -45,7 +45,7 @@ func MsgID(genesisValidatorsRoot []byte, pmsg *pubsubpb.Message) string {
 		// never be hit.
 		msg := make([]byte, 20)
 		copy(msg, "invalid")
-		return string(msg)
+		return bytesutil.UnsafeCastToString(msg)
 	}
 	if fEpoch >= params.BeaconConfig().AltairForkEpoch {
 		return postAltairMsgID(pmsg, fEpoch)
@@ -54,11 +54,11 @@ func MsgID(genesisValidatorsRoot []byte, pmsg *pubsubpb.Message) string {
 	if err != nil {
 		combinedData := append(params.BeaconConfig().MessageDomainInvalidSnappy[:], pmsg.Data...)
 		h := hash.Hash(combinedData)
-		return string(h[:20])
+		return bytesutil.UnsafeCastToString(h[:20])
 	}
 	combinedData := append(params.BeaconConfig().MessageDomainValidSnappy[:], decodedData...)
 	h := hash.Hash(combinedData)
-	return string(h[:20])
+	return bytesutil.UnsafeCastToString(h[:20])
 }
 
 // Spec:
@@ -93,13 +93,13 @@ func postAltairMsgID(pmsg *pubsubpb.Message, fEpoch primitives.Epoch) string {
 			// should never happen
 			msg := make([]byte, 20)
 			copy(msg, "invalid")
-			return string(msg)
+			return bytesutil.UnsafeCastToString(msg)
 		}
 		if uint64(totalLength) > gossipPubSubSize {
 			// this should never happen
 			msg := make([]byte, 20)
 			copy(msg, "invalid")
-			return string(msg)
+			return bytesutil.UnsafeCastToString(msg)
 		}
 		combinedData := make([]byte, 0, totalLength)
 		combinedData = append(combinedData, params.BeaconConfig().MessageDomainInvalidSnappy[:]...)
@@ -107,7 +107,7 @@ func postAltairMsgID(pmsg *pubsubpb.Message, fEpoch primitives.Epoch) string {
 		combinedData = append(combinedData, topic...)
 		combinedData = append(combinedData, pmsg.Data...)
 		h := hash.Hash(combinedData)
-		return string(h[:20])
+		return bytesutil.UnsafeCastToString(h[:20])
 	}
 	totalLength, err := math.AddInt(
 		len(params.BeaconConfig().MessageDomainValidSnappy),
@@ -120,7 +120,7 @@ func postAltairMsgID(pmsg *pubsubpb.Message, fEpoch primitives.Epoch) string {
 		// should never happen
 		msg := make([]byte, 20)
 		copy(msg, "invalid")
-		return string(msg)
+		return bytesutil.UnsafeCastToString(msg)
 	}
 	combinedData := make([]byte, 0, totalLength)
 	combinedData = append(combinedData, params.BeaconConfig().MessageDomainValidSnappy[:]...)
@@ -128,5 +128,5 @@ func postAltairMsgID(pmsg *pubsubpb.Message, fEpoch primitives.Epoch) string {
 	combinedData = append(combinedData, topic...)
 	combinedData = append(combinedData, decodedData...)
 	h := hash.Hash(combinedData)
-	return string(h[:20])
+	return bytesutil.UnsafeCastToString(h[:20])
 }

beacon-chain/rpc/core/validator.go

@@ -381,21 +381,12 @@ func (s *Service) SubmitSignedAggregateSelectionProof(
 	ctx, span := trace.StartSpan(ctx, "coreService.SubmitSignedAggregateSelectionProof")
 	defer span.End()
 
-	if agg == nil {
+	if agg == nil || agg.IsNil() {
 		return &RpcError{Err: errors.New("signed aggregate request can't be nil"), Reason: BadRequest}
 	}
 	attAndProof := agg.AggregateAttestationAndProof()
-	if attAndProof == nil {
-		return &RpcError{Err: errors.New("signed aggregate request can't be nil"), Reason: BadRequest}
-	}
 	att := attAndProof.AggregateVal()
-	if att == nil {
-		return &RpcError{Err: errors.New("signed aggregate request can't be nil"), Reason: BadRequest}
-	}
 	data := att.GetData()
-	if data == nil {
-		return &RpcError{Err: errors.New("signed aggregate request can't be nil"), Reason: BadRequest}
-	}
 	emptySig := make([]byte, fieldparams.BLSSignatureLength)
 	if bytes.Equal(agg.GetSignature(), emptySig) || bytes.Equal(attAndProof.GetSelectionProof(), emptySig) {
 		return &RpcError{Err: errors.New("signed signatures can't be zero hashes"), Reason: BadRequest}

beacon-chain/rpc/endpoints.go

@@ -199,6 +199,15 @@ func (s *Service) validatorEndpoints(
 			handler: server.GetAggregateAttestation,
 			methods: []string{http.MethodGet},
 		},
+		{
+			template: "/eth/v2/validator/aggregate_attestation",
+			name:     namespace + ".GetAggregateAttestationV2",
+			middleware: []middleware.Middleware{
+				middleware.AcceptHeaderHandler([]string{api.JsonMediaType}),
+			},
+			handler: server.GetAggregateAttestationV2,
+			methods: []string{http.MethodGet},
+		},
 		{
 			template: "/eth/v1/validator/contribution_and_proofs",
 			name:     namespace + ".SubmitContributionAndProofs",
@@ -601,7 +610,7 @@ func (s *Service) beaconEndpoints(
 			middleware: []middleware.Middleware{
 				middleware.AcceptHeaderHandler([]string{api.JsonMediaType}),
 			},
-			handler: server.GetBlockAttestations,
+			handler: server.GetBlockAttestationsV2,
 			methods: []string{http.MethodGet},
 		},
 		{
@@ -650,6 +659,16 @@ func (s *Service) beaconEndpoints(
 			handler: server.SubmitAttestations,
 			methods: []string{http.MethodPost},
 		},
+		{
+			template: "/eth/v2/beacon/pool/attestations",
+			name:     namespace + ".SubmitAttestationsV2",
+			middleware: []middleware.Middleware{
+				middleware.ContentTypeHandler([]string{api.JsonMediaType}),
+				middleware.AcceptHeaderHandler([]string{api.JsonMediaType}),
+			},
+			handler: server.SubmitAttestationsV2,
+			methods: []string{http.MethodPost},
+		},
 		{
 			template: "/eth/v1/beacon/pool/voluntary_exits",
 			name:     namespace + ".ListVoluntaryExits",

beacon-chain/rpc/endpoints_test.go

@@ -41,7 +41,7 @@ func Test_endpoints(t *testing.T) {
 		"/eth/v1/beacon/deposit_snapshot":                            {http.MethodGet},
 		"/eth/v1/beacon/blinded_blocks/{block_id}":                   {http.MethodGet},
 		"/eth/v1/beacon/pool/attestations":                           {http.MethodGet, http.MethodPost},
-		"/eth/v2/beacon/pool/attestations":                           {http.MethodGet},
+		"/eth/v2/beacon/pool/attestations":                           {http.MethodGet, http.MethodPost},
 		"/eth/v1/beacon/pool/attester_slashings":                     {http.MethodGet, http.MethodPost},
 		"/eth/v2/beacon/pool/attester_slashings":                     {http.MethodGet, http.MethodPost},
 		"/eth/v1/beacon/pool/proposer_slashings":                     {http.MethodGet, http.MethodPost},
@@ -101,6 +101,7 @@ func Test_endpoints(t *testing.T) {
 		"/eth/v1/validator/blinded_blocks/{slot}":          {http.MethodGet},
 		"/eth/v1/validator/attestation_data":               {http.MethodGet},
 		"/eth/v1/validator/aggregate_attestation":          {http.MethodGet},
+		"/eth/v2/validator/aggregate_attestation":          {http.MethodGet},
 		"/eth/v1/validator/aggregate_and_proofs":           {http.MethodPost},
 		"/eth/v2/validator/aggregate_and_proofs":           {http.MethodPost},
 		"/eth/v1/validator/beacon_committee_subscriptions": {http.MethodPost},

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

@@ -3,13 +3,14 @@ package beacon
 import (
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
+	"strconv"
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/api"
 	"github.com/prysmaticlabs/prysm/v5/api/server"
 	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
@@ -148,6 +149,7 @@ func (s *Server) ListAttestationsV2(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	w.Header().Set(api.VersionHeader, version.String(headState.Version()))
 	httputil.WriteJson(w, &structs.ListAttestationsResponse{
 		Version: version.String(headState.Version()),
 		Data:    attsData,
@@ -189,70 +191,13 @@ func (s *Server) SubmitAttestations(w http.ResponseWriter, r *http.Request) {
 		httputil.HandleError(w, "Could not decode request body: "+err.Error(), http.StatusBadRequest)
 		return
 	}
-	if len(req.Data) == 0 {
-		httputil.HandleError(w, "No data submitted", http.StatusBadRequest)
+
+	attFailures, failedBroadcasts, err := s.handleAttestations(ctx, req.Data)
+	if err != nil {
+		httputil.HandleError(w, err.Error(), http.StatusBadRequest)
 		return
 	}
 
-	var validAttestations []*eth.Attestation
-	var attFailures []*server.IndexedVerificationFailure
-	for i, sourceAtt := range req.Data {
-		att, err := sourceAtt.ToConsensus()
-		if err != nil {
-			attFailures = append(attFailures, &server.IndexedVerificationFailure{
-				Index:   i,
-				Message: "Could not convert request attestation to consensus attestation: " + err.Error(),
-			})
-			continue
-		}
-		if _, err = bls.SignatureFromBytes(att.Signature); err != nil {
-			attFailures = append(attFailures, &server.IndexedVerificationFailure{
-				Index:   i,
-				Message: "Incorrect attestation signature: " + err.Error(),
-			})
-			continue
-		}
-
-		// Broadcast the unaggregated attestation on a feed to notify other services in the beacon node
-		// of a received unaggregated attestation.
-		// Note we can't send for aggregated att because we don't have selection proof.
-		if !corehelpers.IsAggregated(att) {
-			s.OperationNotifier.OperationFeed().Send(&feed.Event{
-				Type: operation.UnaggregatedAttReceived,
-				Data: &operation.UnAggregatedAttReceivedData{
-					Attestation: att,
-				},
-			})
-		}
-
-		validAttestations = append(validAttestations, att)
-	}
-
-	failedBroadcasts := make([]string, 0)
-	for i, att := range validAttestations {
-		// Determine subnet to broadcast attestation to
-		wantedEpoch := slots.ToEpoch(att.Data.Slot)
-		vals, err := s.HeadFetcher.HeadValidatorsIndices(ctx, wantedEpoch)
-		if err != nil {
-			httputil.HandleError(w, "Could not get head validator indices: "+err.Error(), http.StatusInternalServerError)
-			return
-		}
-		subnet := corehelpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), att.Data.CommitteeIndex, att.Data.Slot)
-
-		if err = s.Broadcaster.BroadcastAttestation(ctx, subnet, att); err != nil {
-			log.WithError(err).Errorf("could not broadcast attestation at index %d", i)
-		}
-
-		if corehelpers.IsAggregated(att) {
-			if err = s.AttestationsPool.SaveAggregatedAttestation(att); err != nil {
-				log.WithError(err).Error("could not save aggregated attestation")
-			}
-		} else {
-			if err = s.AttestationsPool.SaveUnaggregatedAttestation(att); err != nil {
-				log.WithError(err).Error("could not save unaggregated attestation")
-			}
-		}
-	}
 	if len(failedBroadcasts) > 0 {
 		httputil.HandleError(
 			w,
@@ -272,6 +217,213 @@ func (s *Server) SubmitAttestations(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// SubmitAttestationsV2 submits an attestation object to node. If the attestation passes all validation
+// constraints, node MUST publish the attestation on an appropriate subnet.
+func (s *Server) SubmitAttestationsV2(w http.ResponseWriter, r *http.Request) {
+	ctx, span := trace.StartSpan(r.Context(), "beacon.SubmitAttestationsV2")
+	defer span.End()
+
+	versionHeader := r.Header.Get(api.VersionHeader)
+	if versionHeader == "" {
+		httputil.HandleError(w, api.VersionHeader+" header is required", http.StatusBadRequest)
+		return
+	}
+	v, err := version.FromString(versionHeader)
+	if err != nil {
+		httputil.HandleError(w, "Invalid version: "+err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	var req structs.SubmitAttestationsRequest
+	err = json.NewDecoder(r.Body).Decode(&req.Data)
+	switch {
+	case errors.Is(err, io.EOF):
+		httputil.HandleError(w, "No data submitted", http.StatusBadRequest)
+		return
+	case err != nil:
+		httputil.HandleError(w, "Could not decode request body: "+err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	var attFailures []*server.IndexedVerificationFailure
+	var failedBroadcasts []string
+
+	if v >= version.Electra {
+		attFailures, failedBroadcasts, err = s.handleAttestationsElectra(ctx, req.Data)
+	} else {
+		attFailures, failedBroadcasts, err = s.handleAttestations(ctx, req.Data)
+	}
+	if err != nil {
+		httputil.HandleError(w, fmt.Sprintf("Failed to handle attestations: %v", err), http.StatusBadRequest)
+		return
+	}
+
+	if len(failedBroadcasts) > 0 {
+		httputil.HandleError(
+			w,
+			fmt.Sprintf("Attestations at index %s could not be broadcasted", strings.Join(failedBroadcasts, ", ")),
+			http.StatusInternalServerError,
+		)
+		return
+	}
+
+	if len(attFailures) > 0 {
+		failuresErr := &server.IndexedVerificationFailureError{
+			Code:     http.StatusBadRequest,
+			Message:  "One or more attestations failed validation",
+			Failures: attFailures,
+		}
+		httputil.WriteError(w, failuresErr)
+	}
+}
+
+func (s *Server) handleAttestationsElectra(ctx context.Context, data json.RawMessage) (attFailures []*server.IndexedVerificationFailure, failedBroadcasts []string, err error) {
+	var sourceAttestations []*structs.AttestationElectra
+
+	if err = json.Unmarshal(data, &sourceAttestations); err != nil {
+		return nil, nil, errors.Wrap(err, "failed to unmarshal attestation")
+	}
+
+	if len(sourceAttestations) == 0 {
+		return nil, nil, errors.New("no data submitted")
+	}
+
+	var validAttestations []*eth.AttestationElectra
+	for i, sourceAtt := range sourceAttestations {
+		att, err := sourceAtt.ToConsensus()
+		if err != nil {
+			attFailures = append(attFailures, &server.IndexedVerificationFailure{
+				Index:   i,
+				Message: "Could not convert request attestation to consensus attestation: " + err.Error(),
+			})
+			continue
+		}
+		if _, err = bls.SignatureFromBytes(att.Signature); err != nil {
+			attFailures = append(attFailures, &server.IndexedVerificationFailure{
+				Index:   i,
+				Message: "Incorrect attestation signature: " + err.Error(),
+			})
+			continue
+		}
+		validAttestations = append(validAttestations, att)
+	}
+
+	for i, att := range validAttestations {
+		// Broadcast the unaggregated attestation on a feed to notify other services in the beacon node
+		// of a received unaggregated attestation.
+		// Note we can't send for aggregated att because we don't have selection proof.
+		if !corehelpers.IsAggregated(att) {
+			s.OperationNotifier.OperationFeed().Send(&feed.Event{
+				Type: operation.UnaggregatedAttReceived,
+				Data: &operation.UnAggregatedAttReceivedData{
+					Attestation: att,
+				},
+			})
+		}
+
+		wantedEpoch := slots.ToEpoch(att.Data.Slot)
+		vals, err := s.HeadFetcher.HeadValidatorsIndices(ctx, wantedEpoch)
+		if err != nil {
+			failedBroadcasts = append(failedBroadcasts, strconv.Itoa(i))
+			continue
+		}
+		committeeIndex, err := att.GetCommitteeIndex()
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "failed to retrieve attestation committee index")
+		}
+		subnet := corehelpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), committeeIndex, att.Data.Slot)
+		if err = s.Broadcaster.BroadcastAttestation(ctx, subnet, att); err != nil {
+			log.WithError(err).Errorf("could not broadcast attestation at index %d", i)
+			failedBroadcasts = append(failedBroadcasts, strconv.Itoa(i))
+			continue
+		}
+
+		if corehelpers.IsAggregated(att) {
+			if err = s.AttestationsPool.SaveAggregatedAttestation(att); err != nil {
+				log.WithError(err).Error("could not save aggregated attestation")
+			}
+		} else {
+			if err = s.AttestationsPool.SaveUnaggregatedAttestation(att); err != nil {
+				log.WithError(err).Error("could not save unaggregated attestation")
+			}
+		}
+	}
+
+	return attFailures, failedBroadcasts, nil
+}
+
+func (s *Server) handleAttestations(ctx context.Context, data json.RawMessage) (attFailures []*server.IndexedVerificationFailure, failedBroadcasts []string, err error) {
+	var sourceAttestations []*structs.Attestation
+
+	if err = json.Unmarshal(data, &sourceAttestations); err != nil {
+		return nil, nil, errors.Wrap(err, "failed to unmarshal attestation")
+	}
+
+	if len(sourceAttestations) == 0 {
+		return nil, nil, errors.New("no data submitted")
+	}
+
+	var validAttestations []*eth.Attestation
+	for i, sourceAtt := range sourceAttestations {
+		att, err := sourceAtt.ToConsensus()
+		if err != nil {
+			attFailures = append(attFailures, &server.IndexedVerificationFailure{
+				Index:   i,
+				Message: "Could not convert request attestation to consensus attestation: " + err.Error(),
+			})
+			continue
+		}
+		if _, err = bls.SignatureFromBytes(att.Signature); err != nil {
+			attFailures = append(attFailures, &server.IndexedVerificationFailure{
+				Index:   i,
+				Message: "Incorrect attestation signature: " + err.Error(),
+			})
+			continue
+		}
+		validAttestations = append(validAttestations, att)
+	}
+
+	for i, att := range validAttestations {
+		// Broadcast the unaggregated attestation on a feed to notify other services in the beacon node
+		// of a received unaggregated attestation.
+		// Note we can't send for aggregated att because we don't have selection proof.
+		if !corehelpers.IsAggregated(att) {
+			s.OperationNotifier.OperationFeed().Send(&feed.Event{
+				Type: operation.UnaggregatedAttReceived,
+				Data: &operation.UnAggregatedAttReceivedData{
+					Attestation: att,
+				},
+			})
+		}
+
+		wantedEpoch := slots.ToEpoch(att.Data.Slot)
+		vals, err := s.HeadFetcher.HeadValidatorsIndices(ctx, wantedEpoch)
+		if err != nil {
+			failedBroadcasts = append(failedBroadcasts, strconv.Itoa(i))
+			continue
+		}
+
+		subnet := corehelpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), att.Data.CommitteeIndex, att.Data.Slot)
+		if err = s.Broadcaster.BroadcastAttestation(ctx, subnet, att); err != nil {
+			log.WithError(err).Errorf("could not broadcast attestation at index %d", i)
+			failedBroadcasts = append(failedBroadcasts, strconv.Itoa(i))
+			continue
+		}
+
+		if corehelpers.IsAggregated(att) {
+			if err = s.AttestationsPool.SaveAggregatedAttestation(att); err != nil {
+				log.WithError(err).Error("could not save aggregated attestation")
+			}
+		} else {
+			if err = s.AttestationsPool.SaveUnaggregatedAttestation(att); err != nil {
+				log.WithError(err).Error("could not save unaggregated attestation")
+			}
+		}
+	}
+
+	return attFailures, failedBroadcasts, nil
+}
+
 // ListVoluntaryExits retrieves voluntary exits known by the node but
 // not necessarily incorporated into any block.
 func (s *Server) ListVoluntaryExits(w http.ResponseWriter, r *http.Request) {

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

@@ -500,95 +500,292 @@ func TestSubmitAttestations(t *testing.T) {
 		ChainInfoFetcher:  chainService,
 		OperationNotifier: &blockchainmock.MockOperationNotifier{},
 	}
+	t.Run("V1", func(t *testing.T) {
+		t.Run("single", func(t *testing.T) {
+			broadcaster := &p2pMock.MockBroadcaster{}
+			s.Broadcaster = broadcaster
+			s.AttestationsPool = attestations.NewPool()
 
-	t.Run("single", func(t *testing.T) {
-		broadcaster := &p2pMock.MockBroadcaster{}
-		s.Broadcaster = broadcaster
-		s.AttestationsPool = attestations.NewPool()
+			var body bytes.Buffer
+			_, err := body.WriteString(singleAtt)
+			require.NoError(t, err)
+			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+			writer := httptest.NewRecorder()
+			writer.Body = &bytes.Buffer{}
 
-		var body bytes.Buffer
-		_, err := body.WriteString(singleAtt)
-		require.NoError(t, err)
-		request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+			s.SubmitAttestations(writer, request)
 
-		s.SubmitAttestations(writer, request)
-		assert.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
-		assert.Equal(t, 1, broadcaster.NumAttestations())
-		assert.Equal(t, "0x03", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetAggregationBits()))
-		assert.Equal(t, "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetSignature()))
-		assert.Equal(t, primitives.Slot(0), broadcaster.BroadcastAttestations[0].GetData().Slot)
-		assert.Equal(t, primitives.CommitteeIndex(0), broadcaster.BroadcastAttestations[0].GetData().CommitteeIndex)
-		assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().BeaconBlockRoot))
-		assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Source.Root))
-		assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Source.Epoch)
-		assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Target.Root))
-		assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Target.Epoch)
-		assert.Equal(t, 1, s.AttestationsPool.UnaggregatedAttestationCount())
+			assert.Equal(t, http.StatusOK, writer.Code)
+			assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
+			assert.Equal(t, 1, broadcaster.NumAttestations())
+			assert.Equal(t, "0x03", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetAggregationBits()))
+			assert.Equal(t, "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetSignature()))
+			assert.Equal(t, primitives.Slot(0), broadcaster.BroadcastAttestations[0].GetData().Slot)
+			assert.Equal(t, primitives.CommitteeIndex(0), broadcaster.BroadcastAttestations[0].GetData().CommitteeIndex)
+			assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().BeaconBlockRoot))
+			assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Source.Root))
+			assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Source.Epoch)
+			assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Target.Root))
+			assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Target.Epoch)
+			assert.Equal(t, 1, s.AttestationsPool.UnaggregatedAttestationCount())
+		})
+		t.Run("multiple", func(t *testing.T) {
+			broadcaster := &p2pMock.MockBroadcaster{}
+			s.Broadcaster = broadcaster
+			s.AttestationsPool = attestations.NewPool()
+
+			var body bytes.Buffer
+			_, err := body.WriteString(multipleAtts)
+			require.NoError(t, err)
+			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+			writer := httptest.NewRecorder()
+			writer.Body = &bytes.Buffer{}
+
+			s.SubmitAttestations(writer, request)
+			assert.Equal(t, http.StatusOK, writer.Code)
+			assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
+			assert.Equal(t, 2, broadcaster.NumAttestations())
+			assert.Equal(t, 2, s.AttestationsPool.UnaggregatedAttestationCount())
+		})
+		t.Run("no body", func(t *testing.T) {
+			request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
+			writer := httptest.NewRecorder()
+			writer.Body = &bytes.Buffer{}
+
+			s.SubmitAttestations(writer, request)
+			assert.Equal(t, http.StatusBadRequest, writer.Code)
+			e := &httputil.DefaultJsonError{}
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+			assert.Equal(t, http.StatusBadRequest, e.Code)
+			assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
+		})
+		t.Run("empty", func(t *testing.T) {
+			var body bytes.Buffer
+			_, err := body.WriteString("[]")
+			require.NoError(t, err)
+			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+			writer := httptest.NewRecorder()
+			writer.Body = &bytes.Buffer{}
+
+			s.SubmitAttestations(writer, request)
+			assert.Equal(t, http.StatusBadRequest, writer.Code)
+			e := &httputil.DefaultJsonError{}
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+			assert.Equal(t, http.StatusBadRequest, e.Code)
+			assert.Equal(t, true, strings.Contains(e.Message, "no data submitted"))
+		})
+		t.Run("invalid", func(t *testing.T) {
+			var body bytes.Buffer
+			_, err := body.WriteString(invalidAtt)
+			require.NoError(t, err)
+			request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+			writer := httptest.NewRecorder()
+			writer.Body = &bytes.Buffer{}
+
+			s.SubmitAttestations(writer, request)
+			assert.Equal(t, http.StatusBadRequest, writer.Code)
+			e := &server.IndexedVerificationFailureError{}
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+			assert.Equal(t, http.StatusBadRequest, e.Code)
+			require.Equal(t, 1, len(e.Failures))
+			assert.Equal(t, true, strings.Contains(e.Failures[0].Message, "Incorrect attestation signature"))
+		})
 	})
-	t.Run("multiple", func(t *testing.T) {
-		broadcaster := &p2pMock.MockBroadcaster{}
-		s.Broadcaster = broadcaster
-		s.AttestationsPool = attestations.NewPool()
+	t.Run("V2", func(t *testing.T) {
+		t.Run("pre-electra", func(t *testing.T) {
+			t.Run("single", func(t *testing.T) {
+				broadcaster := &p2pMock.MockBroadcaster{}
+				s.Broadcaster = broadcaster
+				s.AttestationsPool = attestations.NewPool()
 
-		var body bytes.Buffer
-		_, err := body.WriteString(multipleAtts)
-		require.NoError(t, err)
-		request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+				var body bytes.Buffer
+				_, err := body.WriteString(singleAtt)
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
 
-		s.SubmitAttestations(writer, request)
-		assert.Equal(t, http.StatusOK, writer.Code)
-		assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
-		assert.Equal(t, 2, broadcaster.NumAttestations())
-		assert.Equal(t, 2, s.AttestationsPool.UnaggregatedAttestationCount())
+				s.SubmitAttestationsV2(writer, request)
+
+				assert.Equal(t, http.StatusOK, writer.Code)
+				assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
+				assert.Equal(t, 1, broadcaster.NumAttestations())
+				assert.Equal(t, "0x03", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetAggregationBits()))
+				assert.Equal(t, "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetSignature()))
+				assert.Equal(t, primitives.Slot(0), broadcaster.BroadcastAttestations[0].GetData().Slot)
+				assert.Equal(t, primitives.CommitteeIndex(0), broadcaster.BroadcastAttestations[0].GetData().CommitteeIndex)
+				assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().BeaconBlockRoot))
+				assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Source.Root))
+				assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Source.Epoch)
+				assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Target.Root))
+				assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Target.Epoch)
+				assert.Equal(t, 1, s.AttestationsPool.UnaggregatedAttestationCount())
+			})
+			t.Run("multiple", func(t *testing.T) {
+				broadcaster := &p2pMock.MockBroadcaster{}
+				s.Broadcaster = broadcaster
+				s.AttestationsPool = attestations.NewPool()
+
+				var body bytes.Buffer
+				_, err := body.WriteString(multipleAtts)
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusOK, writer.Code)
+				assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
+				assert.Equal(t, 2, broadcaster.NumAttestations())
+				assert.Equal(t, 2, s.AttestationsPool.UnaggregatedAttestationCount())
+			})
+			t.Run("no body", func(t *testing.T) {
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
+				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusBadRequest, writer.Code)
+				e := &httputil.DefaultJsonError{}
+				require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+				assert.Equal(t, http.StatusBadRequest, e.Code)
+				assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
+			})
+			t.Run("empty", func(t *testing.T) {
+				var body bytes.Buffer
+				_, err := body.WriteString("[]")
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusBadRequest, writer.Code)
+				e := &httputil.DefaultJsonError{}
+				require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+				assert.Equal(t, http.StatusBadRequest, e.Code)
+				assert.Equal(t, true, strings.Contains(e.Message, "no data submitted"))
+			})
+			t.Run("invalid", func(t *testing.T) {
+				var body bytes.Buffer
+				_, err := body.WriteString(invalidAtt)
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusBadRequest, writer.Code)
+				e := &server.IndexedVerificationFailureError{}
+				require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+				assert.Equal(t, http.StatusBadRequest, e.Code)
+				require.Equal(t, 1, len(e.Failures))
+				assert.Equal(t, true, strings.Contains(e.Failures[0].Message, "Incorrect attestation signature"))
+			})
+		})
+		t.Run("post-electra", func(t *testing.T) {
+			t.Run("single", func(t *testing.T) {
+				broadcaster := &p2pMock.MockBroadcaster{}
+				s.Broadcaster = broadcaster
+				s.AttestationsPool = attestations.NewPool()
+
+				var body bytes.Buffer
+				_, err := body.WriteString(singleAttElectra)
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+
+				assert.Equal(t, http.StatusOK, writer.Code)
+				assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
+				assert.Equal(t, 1, broadcaster.NumAttestations())
+				assert.Equal(t, "0x03", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetAggregationBits()))
+				assert.Equal(t, "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetSignature()))
+				assert.Equal(t, primitives.Slot(0), broadcaster.BroadcastAttestations[0].GetData().Slot)
+				assert.Equal(t, primitives.CommitteeIndex(0), broadcaster.BroadcastAttestations[0].GetData().CommitteeIndex)
+				assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().BeaconBlockRoot))
+				assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Source.Root))
+				assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Source.Epoch)
+				assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Target.Root))
+				assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Target.Epoch)
+				assert.Equal(t, 1, s.AttestationsPool.UnaggregatedAttestationCount())
+			})
+			t.Run("multiple", func(t *testing.T) {
+				broadcaster := &p2pMock.MockBroadcaster{}
+				s.Broadcaster = broadcaster
+				s.AttestationsPool = attestations.NewPool()
+
+				var body bytes.Buffer
+				_, err := body.WriteString(multipleAttsElectra)
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusOK, writer.Code)
+				assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
+				assert.Equal(t, 2, broadcaster.NumAttestations())
+				assert.Equal(t, 2, s.AttestationsPool.UnaggregatedAttestationCount())
+			})
+			t.Run("no body", func(t *testing.T) {
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
+				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusBadRequest, writer.Code)
+				e := &httputil.DefaultJsonError{}
+				require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+				assert.Equal(t, http.StatusBadRequest, e.Code)
+				assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
+			})
+			t.Run("empty", func(t *testing.T) {
+				var body bytes.Buffer
+				_, err := body.WriteString("[]")
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusBadRequest, writer.Code)
+				e := &httputil.DefaultJsonError{}
+				require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+				assert.Equal(t, http.StatusBadRequest, e.Code)
+				assert.Equal(t, true, strings.Contains(e.Message, "no data submitted"))
+			})
+			t.Run("invalid", func(t *testing.T) {
+				var body bytes.Buffer
+				_, err := body.WriteString(invalidAttElectra)
+				require.NoError(t, err)
+				request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+				request.Header.Set(api.VersionHeader, version.String(version.Electra))
+				writer := httptest.NewRecorder()
+				writer.Body = &bytes.Buffer{}
+
+				s.SubmitAttestationsV2(writer, request)
+				assert.Equal(t, http.StatusBadRequest, writer.Code)
+				e := &server.IndexedVerificationFailureError{}
+				require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+				assert.Equal(t, http.StatusBadRequest, e.Code)
+				require.Equal(t, 1, len(e.Failures))
+				assert.Equal(t, true, strings.Contains(e.Failures[0].Message, "Incorrect attestation signature"))
+			})
+		})
 	})
-	t.Run("no body", func(t *testing.T) {
-		request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
 
-		s.SubmitAttestations(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
-	})
-	t.Run("empty", func(t *testing.T) {
-		var body bytes.Buffer
-		_, err := body.WriteString("[]")
-		require.NoError(t, err)
-		request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
-
-		s.SubmitAttestations(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
-	})
-	t.Run("invalid", func(t *testing.T) {
-		var body bytes.Buffer
-		_, err := body.WriteString(invalidAtt)
-		require.NoError(t, err)
-		request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
-
-		s.SubmitAttestations(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &server.IndexedVerificationFailureError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		require.Equal(t, 1, len(e.Failures))
-		assert.Equal(t, true, strings.Contains(e.Failures[0].Message, "Incorrect attestation signature"))
-	})
 }
 
 func TestListVoluntaryExits(t *testing.T) {
@@ -2063,6 +2260,85 @@ var (
       }
     }
   }
+]`
+	singleAttElectra = `[
+  {
+    "aggregation_bits": "0x03",
+	"committee_bits": "0x0100000000000000",
+    "signature": "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15",
+    "data": {
+      "slot": "0",
+      "index": "0",
+      "beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+      "source": {
+        "epoch": "0",
+        "root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
+      },
+      "target": {
+        "epoch": "0",
+        "root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
+      }
+    }
+  }
+]`
+	multipleAttsElectra = `[
+  {
+    "aggregation_bits": "0x03",
+	"committee_bits": "0x0100000000000000",
+    "signature": "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15",
+    "data": {
+      "slot": "0",
+      "index": "0",
+      "beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+      "source": {
+        "epoch": "0",
+        "root": "0x736f75726365726f6f7431000000000000000000000000000000000000000000"
+      },
+      "target": {
+        "epoch": "0",
+        "root": "0x746172676574726f6f7431000000000000000000000000000000000000000000"
+      }
+    }
+  },
+  {
+    "aggregation_bits": "0x03",
+	"committee_bits": "0x0100000000000000",
+    "signature": "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15",
+    "data": {
+      "slot": "0",
+      "index": "0",
+      "beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+      "source": {
+        "epoch": "0",
+        "root": "0x736f75726365726f6f7431000000000000000000000000000000000000000000"
+      },
+      "target": {
+        "epoch": "0",
+        "root": "0x746172676574726f6f7432000000000000000000000000000000000000000000"
+      }
+    }
+  }
+]`
+	// signature is invalid
+	invalidAttElectra = `[
+  {
+    "aggregation_bits": "0x03",
+	"committee_bits": "0x0100000000000000",
+	"signature": "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+    "data": {
+      "slot": "0",
+      "index": "0",
+      "beacon_block_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+      "source": {
+        "epoch": "0",
+        "root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
+      },
+      "target": {
+        "epoch": "0",
+        "root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"
+      }
+    }
+  }
 ]`
 	exit1 = `{
   "message": {

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

@@ -79,6 +79,7 @@ func TestGetSpec(t *testing.T) {
 	config.DenebForkEpoch = 105
 	config.ElectraForkVersion = []byte("ElectraForkVersion")
 	config.ElectraForkEpoch = 107
+	config.Eip7594ForkEpoch = 109
 	config.BLSWithdrawalPrefixByte = byte('b')
 	config.ETH1AddressWithdrawalPrefixByte = byte('c')
 	config.GenesisDelay = 24
@@ -189,7 +190,7 @@ func TestGetSpec(t *testing.T) {
 	data, ok := resp.Data.(map[string]interface{})
 	require.Equal(t, true, ok)
 
-	assert.Equal(t, 155, len(data))
+	assert.Equal(t, 156, len(data))
 	for k, v := range data {
 		t.Run(k, func(t *testing.T) {
 			switch k {
@@ -267,6 +268,8 @@ func TestGetSpec(t *testing.T) {
 				assert.Equal(t, "0x"+hex.EncodeToString([]byte("ElectraForkVersion")), v)
 			case "ELECTRA_FORK_EPOCH":
 				assert.Equal(t, "107", v)
+			case "EIP7594_FORK_EPOCH":
+				assert.Equal(t, "109", v)
 			case "MIN_ANCHOR_POW_BLOCK_DIFFICULTY":
 				assert.Equal(t, "1000", v)
 			case "BLS_WITHDRAWAL_PREFIX":

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

@@ -19,11 +19,12 @@ go_library(
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
         "//beacon-chain/core/time:go_default_library",
-        "//beacon-chain/core/transition:go_default_library",
         "//config/params:go_default_library",
+        "//consensus-types/payload-attribute:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
         "//network/httputil:go_default_library",
+        "//proto/engine/v1:go_default_library",
         "//proto/eth/v1:go_default_library",
         "//proto/eth/v2:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
@@ -52,6 +53,7 @@ go_test(
         "//config/fieldparams:go_default_library",
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/interfaces:go_default_library",
+        "//consensus-types/payload-attribute:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//proto/eth/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",

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

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"strconv"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
@@ -18,11 +19,12 @@ import (
 	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	chaintime "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
+	payloadattribute "github.com/prysmaticlabs/prysm/v5/consensus-types/payload-attribute"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
 	"github.com/prysmaticlabs/prysm/v5/network/httputil"
+	engine "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/eth/v1"
 	ethpbv2 "github.com/prysmaticlabs/prysm/v5/proto/eth/v2"
 	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
@@ -31,6 +33,7 @@ import (
 )
 
 const DefaultEventFeedDepth = 1000
+const payloadAttributeTimeout = 2 * time.Second
 
 const (
 	InvalidTopic = "__invalid__"
@@ -89,12 +92,12 @@ var opsFeedEventTopics = map[feed.EventType]string{
 
 var stateFeedEventTopics = map[feed.EventType]string{
 	statefeed.NewHead:                     HeadTopic,
-	statefeed.MissedSlot:                  PayloadAttributesTopic,
 	statefeed.FinalizedCheckpoint:         FinalizedCheckpointTopic,
 	statefeed.LightClientFinalityUpdate:   LightClientFinalityUpdateTopic,
 	statefeed.LightClientOptimisticUpdate: LightClientOptimisticUpdateTopic,
 	statefeed.Reorg:                       ChainReorgTopic,
 	statefeed.BlockProcessed:              BlockTopic,
+	statefeed.PayloadAttributes:           PayloadAttributesTopic,
 }
 
 var topicsForStateFeed = topicsForFeed(stateFeedEventTopics)
@@ -418,10 +421,9 @@ func topicForEvent(event *feed.Event) string {
 		return ChainReorgTopic
 	case *statefeed.BlockProcessedData:
 		return BlockTopic
+	case payloadattribute.EventData:
+		return PayloadAttributesTopic
 	default:
-		if event.Type == statefeed.MissedSlot {
-			return PayloadAttributesTopic
-		}
 		return InvalidTopic
 	}
 }
@@ -431,31 +433,17 @@ func (s *Server) lazyReaderForEvent(ctx context.Context, event *feed.Event, topi
 	if !topics.requested(eventName) {
 		return nil, errNotRequested
 	}
-	if eventName == PayloadAttributesTopic {
-		return s.currentPayloadAttributes(ctx)
-	}
 	if event == nil || event.Data == nil {
 		return nil, errors.New("event or event data is nil")
 	}
 	switch v := event.Data.(type) {
+	case payloadattribute.EventData:
+		return s.payloadAttributesReader(ctx, v)
 	case *ethpb.EventHead:
 		// The head event is a special case because, if the client requested the payload attributes topic,
 		// we send two event messages in reaction; the head event and the payload attributes.
-		headReader := func() io.Reader {
-			return jsonMarshalReader(eventName, structs.HeadEventFromV1(v))
-		}
-		// Don't do the expensive attr lookup unless the client requested it.
-		if !topics.requested(PayloadAttributesTopic) {
-			return headReader, nil
-		}
-		// Since payload attributes could change before the outbox is written, we need to do a blocking operation to
-		// get the current payload attributes right here.
-		attrReader, err := s.currentPayloadAttributes(ctx)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not get payload attributes for head event")
-		}
 		return func() io.Reader {
-			return io.MultiReader(headReader(), attrReader())
+			return jsonMarshalReader(eventName, structs.HeadEventFromV1(v))
 		}, nil
 	case *operation.AggregatedAttReceivedData:
 		return func() io.Reader {
@@ -463,14 +451,20 @@ func (s *Server) lazyReaderForEvent(ctx context.Context, event *feed.Event, topi
 			return jsonMarshalReader(eventName, att)
 		}, nil
 	case *operation.UnAggregatedAttReceivedData:
-		att, ok := v.Attestation.(*eth.Attestation)
-		if !ok {
+		switch att := v.Attestation.(type) {
+		case *eth.Attestation:
+			return func() io.Reader {
+				att := structs.AttFromConsensus(att)
+				return jsonMarshalReader(eventName, att)
+			}, nil
+		case *eth.AttestationElectra:
+			return func() io.Reader {
+				att := structs.AttElectraFromConsensus(att)
+				return jsonMarshalReader(eventName, att)
+			}, nil
+		default:
 			return nil, errors.Wrapf(errUnhandledEventData, "Unexpected type %T for the .Attestation field of UnAggregatedAttReceivedData", v.Attestation)
 		}
-		return func() io.Reader {
-			att := structs.AttFromConsensus(att)
-			return jsonMarshalReader(eventName, att)
-		}, nil
 	case *operation.ExitReceivedData:
 		return func() io.Reader {
 			return jsonMarshalReader(eventName, structs.SignedExitFromConsensus(v.Exit))
@@ -495,13 +489,18 @@ func (s *Server) lazyReaderForEvent(ctx context.Context, event *feed.Event, topi
 			})
 		}, nil
 	case *operation.AttesterSlashingReceivedData:
-		slashing, ok := v.AttesterSlashing.(*eth.AttesterSlashing)
-		if !ok {
+		switch slashing := v.AttesterSlashing.(type) {
+		case *eth.AttesterSlashing:
+			return func() io.Reader {
+				return jsonMarshalReader(eventName, structs.AttesterSlashingFromConsensus(slashing))
+			}, nil
+		case *eth.AttesterSlashingElectra:
+			return func() io.Reader {
+				return jsonMarshalReader(eventName, structs.AttesterSlashingElectraFromConsensus(slashing))
+			}, nil
+		default:
 			return nil, errors.Wrapf(errUnhandledEventData, "Unexpected type %T for the .AttesterSlashing field of AttesterSlashingReceivedData", v.AttesterSlashing)
 		}
-		return func() io.Reader {
-			return jsonMarshalReader(eventName, structs.AttesterSlashingFromConsensus(slashing))
-		}, nil
 	case *operation.ProposerSlashingReceivedData:
 		return func() io.Reader {
 			return jsonMarshalReader(eventName, structs.ProposerSlashingFromConsensus(v.ProposerSlashing))
@@ -556,115 +555,202 @@ func (s *Server) lazyReaderForEvent(ctx context.Context, event *feed.Event, topi
 	}
 }
 
-// This event stream is intended to be used by builders and relays.
-// Parent fields are based on state at N_{current_slot}, while the rest of fields are based on state of N_{current_slot + 1}
-func (s *Server) currentPayloadAttributes(ctx context.Context) (lazyReader, error) {
-	headRoot, err := s.HeadFetcher.HeadRoot(ctx)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get head root")
-	}
-	st, err := s.HeadFetcher.HeadState(ctx)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get head state")
-	}
-	// advance the head state
-	headState, err := transition.ProcessSlotsIfPossible(ctx, st, s.ChainInfoFetcher.CurrentSlot()+1)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not advance head state")
+var errUnsupportedPayloadAttribute = errors.New("cannot compute payload attributes pre-Bellatrix")
+
+func (s *Server) computePayloadAttributes(ctx context.Context, ev payloadattribute.EventData) (payloadattribute.Attributer, error) {
+	v := ev.HeadState.Version()
+	if v < version.Bellatrix {
+		return nil, errors.Wrapf(errUnsupportedPayloadAttribute, "%s is not supported", version.String(v))
 	}
 
-	headBlock, err := s.HeadFetcher.HeadBlock(ctx)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get head block")
-	}
-
-	headPayload, err := headBlock.Block().Body().Execution()
-	if err != nil {
-		return nil, errors.Wrap(err, "could not get execution payload")
-	}
-
-	t, err := slots.ToTime(headState.GenesisTime(), headState.Slot())
+	t, err := slots.ToTime(ev.HeadState.GenesisTime(), ev.HeadState.Slot())
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get head state slot time")
 	}
-
-	prevRando, err := helpers.RandaoMix(headState, chaintime.CurrentEpoch(headState))
+	timestamp := uint64(t.Unix())
+	prevRando, err := helpers.RandaoMix(ev.HeadState, chaintime.CurrentEpoch(ev.HeadState))
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get head state randao mix")
 	}
-
-	proposerIndex, err := helpers.BeaconProposerIndex(ctx, headState)
+	proposerIndex, err := helpers.BeaconProposerIndex(ctx, ev.HeadState)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get head state proposer index")
 	}
-	feeRecipient := params.BeaconConfig().DefaultFeeRecipient.Bytes()
+	feeRecpt := params.BeaconConfig().DefaultFeeRecipient.Bytes()
 	tValidator, exists := s.TrackedValidatorsCache.Validator(proposerIndex)
 	if exists {
-		feeRecipient = tValidator.FeeRecipient[:]
-	}
-	var attributes interface{}
-	switch headState.Version() {
-	case version.Bellatrix:
-		attributes = &structs.PayloadAttributesV1{
-			Timestamp:             fmt.Sprintf("%d", t.Unix()),
-			PrevRandao:            hexutil.Encode(prevRando),
-			SuggestedFeeRecipient: hexutil.Encode(feeRecipient),
-		}
-	case version.Capella:
-		withdrawals, _, err := headState.ExpectedWithdrawals()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not get head state expected withdrawals")
-		}
-		attributes = &structs.PayloadAttributesV2{
-			Timestamp:             fmt.Sprintf("%d", t.Unix()),
-			PrevRandao:            hexutil.Encode(prevRando),
-			SuggestedFeeRecipient: hexutil.Encode(feeRecipient),
-			Withdrawals:           structs.WithdrawalsFromConsensus(withdrawals),
-		}
-	case version.Deneb, version.Electra:
-		withdrawals, _, err := headState.ExpectedWithdrawals()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not get head state expected withdrawals")
-		}
-		parentRoot, err := headBlock.Block().HashTreeRoot()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not get head block root")
-		}
-		attributes = &structs.PayloadAttributesV3{
-			Timestamp:             fmt.Sprintf("%d", t.Unix()),
-			PrevRandao:            hexutil.Encode(prevRando),
-			SuggestedFeeRecipient: hexutil.Encode(feeRecipient),
-			Withdrawals:           structs.WithdrawalsFromConsensus(withdrawals),
-			ParentBeaconBlockRoot: hexutil.Encode(parentRoot[:]),
-		}
-	default:
-		return nil, errors.Wrapf(err, "Payload version %s is not supported", version.String(headState.Version()))
+		feeRecpt = tValidator.FeeRecipient[:]
 	}
 
-	attributesBytes, err := json.Marshal(attributes)
-	if err != nil {
-		return nil, errors.Wrap(err, "errors marshaling payload attributes to json")
-	}
-	eventData := structs.PayloadAttributesEventData{
-		ProposerIndex:     fmt.Sprintf("%d", proposerIndex),
-		ProposalSlot:      fmt.Sprintf("%d", headState.Slot()),
-		ParentBlockNumber: fmt.Sprintf("%d", headPayload.BlockNumber()),
-		ParentBlockRoot:   hexutil.Encode(headRoot),
-		ParentBlockHash:   hexutil.Encode(headPayload.BlockHash()),
-		PayloadAttributes: attributesBytes,
-	}
-	eventDataBytes, err := json.Marshal(eventData)
-	if err != nil {
-		return nil, errors.Wrap(err, "errors marshaling payload attributes event data to json")
-	}
-	return func() io.Reader {
-		return jsonMarshalReader(PayloadAttributesTopic, &structs.PayloadAttributesEvent{
-			Version: version.String(headState.Version()),
-			Data:    eventDataBytes,
+	if v == version.Bellatrix {
+		return payloadattribute.New(&engine.PayloadAttributes{
+			Timestamp:             timestamp,
+			PrevRandao:            prevRando,
+			SuggestedFeeRecipient: feeRecpt,
 		})
+	}
+
+	w, _, err := ev.HeadState.ExpectedWithdrawals()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get withdrawals from head state")
+	}
+	if v == version.Capella {
+		return payloadattribute.New(&engine.PayloadAttributesV2{
+			Timestamp:             timestamp,
+			PrevRandao:            prevRando,
+			SuggestedFeeRecipient: feeRecpt,
+			Withdrawals:           w,
+		})
+	}
+
+	pr, err := ev.HeadBlock.Block().HashTreeRoot()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not compute head block root")
+	}
+	return payloadattribute.New(&engine.PayloadAttributesV3{
+		Timestamp:             timestamp,
+		PrevRandao:            prevRando,
+		SuggestedFeeRecipient: feeRecpt,
+		Withdrawals:           w,
+		ParentBeaconBlockRoot: pr[:],
+	})
+}
+
+type asyncPayloadAttrData struct {
+	data    json.RawMessage
+	version string
+	err     error
+}
+
+func (s *Server) fillEventData(ctx context.Context, ev payloadattribute.EventData) (payloadattribute.EventData, error) {
+	if ev.HeadBlock == nil || ev.HeadBlock.IsNil() {
+		hb, err := s.HeadFetcher.HeadBlock(ctx)
+		if err != nil {
+			return ev, errors.Wrap(err, "Could not look up head block")
+		}
+		root, err := hb.Block().HashTreeRoot()
+		if err != nil {
+			return ev, errors.Wrap(err, "Could not compute head block root")
+		}
+		if ev.HeadRoot != root {
+			return ev, errors.Wrap(err, "head root changed before payload attribute event handler execution")
+		}
+		ev.HeadBlock = hb
+		payload, err := hb.Block().Body().Execution()
+		if err != nil {
+			return ev, errors.Wrap(err, "Could not get execution payload for head block")
+		}
+		ev.ParentBlockHash = payload.BlockHash()
+		ev.ParentBlockNumber = payload.BlockNumber()
+	}
+
+	attr := ev.Attributer
+	if attr == nil || attr.IsEmpty() {
+		attr, err := s.computePayloadAttributes(ctx, ev)
+		if err != nil {
+			return ev, errors.Wrap(err, "Could not compute payload attributes")
+		}
+		ev.Attributer = attr
+	}
+	return ev, nil
+}
+
+// This event stream is intended to be used by builders and relays.
+// Parent fields are based on state at N_{current_slot}, while the rest of fields are based on state of N_{current_slot + 1}
+func (s *Server) payloadAttributesReader(ctx context.Context, ev payloadattribute.EventData) (lazyReader, error) {
+	ctx, cancel := context.WithTimeout(ctx, payloadAttributeTimeout)
+	edc := make(chan asyncPayloadAttrData)
+	go func() {
+		d := asyncPayloadAttrData{
+			version: version.String(ev.HeadState.Version()),
+		}
+
+		defer func() {
+			edc <- d
+		}()
+		ev, err := s.fillEventData(ctx, ev)
+		if err != nil {
+			d.err = errors.Wrap(err, "Could not fill event data")
+			return
+		}
+		attributesBytes, err := marshalAttributes(ev.Attributer)
+		if err != nil {
+			d.err = errors.Wrap(err, "errors marshaling payload attributes to json")
+			return
+		}
+		d.data, d.err = json.Marshal(structs.PayloadAttributesEventData{
+			ProposerIndex:     strconv.FormatUint(uint64(ev.ProposerIndex), 10),
+			ProposalSlot:      strconv.FormatUint(uint64(ev.ProposalSlot), 10),
+			ParentBlockNumber: strconv.FormatUint(ev.ParentBlockNumber, 10),
+			ParentBlockRoot:   hexutil.Encode(ev.ParentBlockRoot),
+			ParentBlockHash:   hexutil.Encode(ev.ParentBlockHash),
+			PayloadAttributes: attributesBytes,
+		})
+		if d.err != nil {
+			d.err = errors.Wrap(d.err, "errors marshaling payload attributes event data to json")
+		}
+	}()
+	return func() io.Reader {
+		defer cancel()
+		select {
+		case <-ctx.Done():
+			log.WithError(ctx.Err()).Warn("Context canceled while waiting for payload attributes event data")
+			return nil
+		case ed := <-edc:
+			if ed.err != nil {
+				log.WithError(ed.err).Warn("Error while marshaling payload attributes event data")
+				return nil
+			}
+			return jsonMarshalReader(PayloadAttributesTopic, &structs.PayloadAttributesEvent{
+				Version: ed.version,
+				Data:    ed.data,
+			})
+		}
 	}, nil
 }
 
+func marshalAttributes(attr payloadattribute.Attributer) ([]byte, error) {
+	v := attr.Version()
+	if v < version.Bellatrix {
+		return nil, errors.Wrapf(errUnsupportedPayloadAttribute, "Payload version %s is not supported", version.String(v))
+	}
+
+	timestamp := strconv.FormatUint(attr.Timestamp(), 10)
+	prevRandao := hexutil.Encode(attr.PrevRandao())
+	feeRecpt := hexutil.Encode(attr.SuggestedFeeRecipient())
+	if v == version.Bellatrix {
+		return json.Marshal(&structs.PayloadAttributesV1{
+			Timestamp:             timestamp,
+			PrevRandao:            prevRandao,
+			SuggestedFeeRecipient: feeRecpt,
+		})
+	}
+	w, err := attr.Withdrawals()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get withdrawals from payload attributes event")
+	}
+	withdrawals := structs.WithdrawalsFromConsensus(w)
+	if v == version.Capella {
+		return json.Marshal(&structs.PayloadAttributesV2{
+			Timestamp:             timestamp,
+			PrevRandao:            prevRandao,
+			SuggestedFeeRecipient: feeRecpt,
+			Withdrawals:           withdrawals,
+		})
+	}
+	parentRoot, err := attr.ParentBeaconBlockRoot()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get parent beacon block root from payload attributes event")
+	}
+	return json.Marshal(&structs.PayloadAttributesV3{
+		Timestamp:             timestamp,
+		PrevRandao:            prevRandao,
+		SuggestedFeeRecipient: feeRecpt,
+		Withdrawals:           withdrawals,
+		ParentBeaconBlockRoot: hexutil.Encode(parentRoot),
+	})
+}
+
 func newStreamingResponseController(rw http.ResponseWriter, timeout time.Duration) *streamingResponseWriterController {
 	rc := http.NewResponseController(rw)
 	return &streamingResponseWriterController{

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

@@ -21,6 +21,7 @@ import (
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	payloadattribute "github.com/prysmaticlabs/prysm/v5/consensus-types/payload-attribute"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/eth/v1"
 	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
@@ -489,7 +490,21 @@ func TestStreamEvents_OperationsEvents(t *testing.T) {
 				require.NoError(t, err)
 				request := topics.testHttpRequest(testSync.ctx, t)
 				w := NewStreamingResponseWriterRecorder(testSync.ctx)
-				events := []*feed.Event{&feed.Event{Type: statefeed.MissedSlot}}
+				events := []*feed.Event{
+					&feed.Event{
+						Type: statefeed.PayloadAttributes,
+						Data: payloadattribute.EventData{
+							ProposerIndex:     0,
+							ProposalSlot:      0,
+							ParentBlockNumber: 0,
+							ParentBlockRoot:   make([]byte, 32),
+							ParentBlockHash:   make([]byte, 32),
+							HeadState:         st,
+							HeadBlock:         b,
+							HeadRoot:          [fieldparams.RootLength]byte{},
+						},
+					},
+				}
 
 				go func() {
 					s.StreamEvents(w, request)

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

@@ -40,6 +40,7 @@ go_library(
         "//monitoring/tracing/trace:go_default_library",
         "//network/httputil:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//proto/prysm/v1alpha1/attestation/aggregation/attestations:go_default_library",
         "//runtime/version:go_default_library",
         "//time/slots:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
@@ -82,6 +83,7 @@ go_test(
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//crypto/bls:go_default_library",
+        "//crypto/bls/common:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//network/httputil:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
@@ -93,6 +95,7 @@ go_test(
         "//time/slots:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
+        "@com_github_prysmaticlabs_go_bitfield//:go_default_library",
         "@com_github_sirupsen_logrus//hooks/test:go_default_library",
         "@org_uber_go_mock//gomock:go_default_library",
     ],

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

@@ -2,11 +2,13 @@ package validator
 
 import (
 	"bytes"
+	"cmp"
 	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
+	"slices"
 	"sort"
 	"strconv"
 	"time"
@@ -32,6 +34,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
 	"github.com/prysmaticlabs/prysm/v5/network/httputil"
 	ethpbalpha "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1/attestation/aggregation/attestations"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
 	"github.com/sirupsen/logrus"
@@ -48,71 +51,165 @@ func (s *Server) GetAggregateAttestation(w http.ResponseWriter, r *http.Request)
 	if !ok {
 		return
 	}
-
 	_, slot, ok := shared.UintFromQuery(w, r, "slot", true)
 	if !ok {
 		return
 	}
 
-	var match ethpbalpha.Att
-	var err error
-
-	match, err = matchingAtt(s.AttestationsPool.AggregatedAttestations(), primitives.Slot(slot), attDataRoot)
+	agg := s.aggregatedAttestation(w, primitives.Slot(slot), attDataRoot, 0)
+	if agg == nil {
+		return
+	}
+	typedAgg, ok := agg.(*ethpbalpha.Attestation)
+	if !ok {
+		httputil.HandleError(w, fmt.Sprintf("Attestation is not of type %T", &ethpbalpha.Attestation{}), http.StatusInternalServerError)
+		return
+	}
+	data, err := json.Marshal(structs.AttFromConsensus(typedAgg))
 	if err != nil {
-		httputil.HandleError(w, "Could not get matching attestation: "+err.Error(), http.StatusInternalServerError)
+		httputil.HandleError(w, "Could not marshal attestation: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	if match == nil {
-		atts, err := s.AttestationsPool.UnaggregatedAttestations()
-		if err != nil {
-			httputil.HandleError(w, "Could not get unaggregated attestations: "+err.Error(), http.StatusInternalServerError)
-			return
-		}
-		match, err = matchingAtt(atts, primitives.Slot(slot), attDataRoot)
-		if err != nil {
-			httputil.HandleError(w, "Could not get matching attestation: "+err.Error(), http.StatusInternalServerError)
-			return
-		}
-	}
-	if match == nil {
-		httputil.HandleError(w, "No matching attestation found", http.StatusNotFound)
-		return
-	}
-
-	response := &structs.AggregateAttestationResponse{
-		Data: &structs.Attestation{
-			AggregationBits: hexutil.Encode(match.GetAggregationBits()),
-			Data: &structs.AttestationData{
-				Slot:            strconv.FormatUint(uint64(match.GetData().Slot), 10),
-				CommitteeIndex:  strconv.FormatUint(uint64(match.GetData().CommitteeIndex), 10),
-				BeaconBlockRoot: hexutil.Encode(match.GetData().BeaconBlockRoot),
-				Source: &structs.Checkpoint{
-					Epoch: strconv.FormatUint(uint64(match.GetData().Source.Epoch), 10),
-					Root:  hexutil.Encode(match.GetData().Source.Root),
-				},
-				Target: &structs.Checkpoint{
-					Epoch: strconv.FormatUint(uint64(match.GetData().Target.Epoch), 10),
-					Root:  hexutil.Encode(match.GetData().Target.Root),
-				},
-			},
-			Signature: hexutil.Encode(match.GetSignature()),
-		}}
-	httputil.WriteJson(w, response)
+	httputil.WriteJson(w, &structs.AggregateAttestationResponse{Data: data})
 }
 
-func matchingAtt(atts []ethpbalpha.Att, slot primitives.Slot, attDataRoot []byte) (ethpbalpha.Att, error) {
+// GetAggregateAttestationV2 aggregates all attestations matching the given attestation data root and slot, returning the aggregated result.
+func (s *Server) GetAggregateAttestationV2(w http.ResponseWriter, r *http.Request) {
+	ctx, span := trace.StartSpan(r.Context(), "validator.GetAggregateAttestationV2")
+	defer span.End()
+
+	_, attDataRoot, ok := shared.HexFromQuery(w, r, "attestation_data_root", fieldparams.RootLength, true)
+	if !ok {
+		return
+	}
+	_, slot, ok := shared.UintFromQuery(w, r, "slot", true)
+	if !ok {
+		return
+	}
+	_, index, ok := shared.UintFromQuery(w, r, "committee_index", true)
+	if !ok {
+		return
+	}
+
+	agg := s.aggregatedAttestation(w, primitives.Slot(slot), attDataRoot, primitives.CommitteeIndex(index))
+	if agg == nil {
+		return
+	}
+	resp := &structs.AggregateAttestationResponse{
+		Version: version.String(agg.Version()),
+	}
+	if agg.Version() >= version.Electra {
+		typedAgg, ok := agg.(*ethpbalpha.AttestationElectra)
+		if !ok {
+			httputil.HandleError(w, fmt.Sprintf("Attestation is not of type %T", &ethpbalpha.AttestationElectra{}), http.StatusInternalServerError)
+			return
+		}
+		data, err := json.Marshal(structs.AttElectraFromConsensus(typedAgg))
+		if err != nil {
+			httputil.HandleError(w, "Could not marshal attestation: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		resp.Data = data
+	} else {
+		typedAgg, ok := agg.(*ethpbalpha.Attestation)
+		if !ok {
+			httputil.HandleError(w, fmt.Sprintf("Attestation is not of type %T", &ethpbalpha.Attestation{}), http.StatusInternalServerError)
+			return
+		}
+		data, err := json.Marshal(structs.AttFromConsensus(typedAgg))
+		if err != nil {
+			httputil.HandleError(w, "Could not marshal attestation: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+		resp.Data = data
+	}
+	headState, err := s.ChainInfoFetcher.HeadStateReadOnly(ctx)
+	if err != nil {
+		httputil.HandleError(w, "Could not get head state: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set(api.VersionHeader, version.String(headState.Version()))
+	httputil.WriteJson(w, resp)
+}
+
+func (s *Server) aggregatedAttestation(w http.ResponseWriter, slot primitives.Slot, attDataRoot []byte, index primitives.CommitteeIndex) ethpbalpha.Att {
+	var err error
+
+	match, err := matchingAtts(s.AttestationsPool.AggregatedAttestations(), slot, attDataRoot, index)
+	if err != nil {
+		httputil.HandleError(w, "Could not get matching attestations: "+err.Error(), http.StatusInternalServerError)
+		return nil
+	}
+	if len(match) > 0 {
+		// If there are multiple matching aggregated attestations,
+		// then we return the one with the most aggregation bits.
+		slices.SortFunc(match, func(a, b ethpbalpha.Att) int {
+			return cmp.Compare(b.GetAggregationBits().Count(), a.GetAggregationBits().Count())
+		})
+		return match[0]
+	}
+
+	atts, err := s.AttestationsPool.UnaggregatedAttestations()
+	if err != nil {
+		httputil.HandleError(w, "Could not get unaggregated attestations: "+err.Error(), http.StatusInternalServerError)
+		return nil
+	}
+	match, err = matchingAtts(atts, slot, attDataRoot, index)
+	if err != nil {
+		httputil.HandleError(w, "Could not get matching attestations: "+err.Error(), http.StatusInternalServerError)
+		return nil
+	}
+	if len(match) == 0 {
+		httputil.HandleError(w, "No matching attestations found", http.StatusNotFound)
+		return nil
+	}
+	agg, err := attestations.Aggregate(match)
+	if err != nil {
+		httputil.HandleError(w, "Could not aggregate unaggregated attestations: "+err.Error(), http.StatusInternalServerError)
+		return nil
+	}
+
+	// Aggregating unaggregated attestations will in theory always return just one aggregate,
+	// so we can take the first one and be done with it.
+	return agg[0]
+}
+
+func matchingAtts(atts []ethpbalpha.Att, slot primitives.Slot, attDataRoot []byte, index primitives.CommitteeIndex) ([]ethpbalpha.Att, error) {
+	if len(atts) == 0 {
+		return []ethpbalpha.Att{}, nil
+	}
+
+	postElectra := atts[0].Version() >= version.Electra
+
+	result := make([]ethpbalpha.Att, 0)
 	for _, att := range atts {
-		if att.GetData().Slot == slot {
-			root, err := att.GetData().HashTreeRoot()
+		if att.GetData().Slot != slot {
+			continue
+		}
+		// We ignore the committee index from the request before Electra.
+		// This is because before Electra the committee index is part of the attestation data,
+		// meaning that comparing the data root is sufficient.
+		// Post-Electra the committee index in the data root is always 0, so we need to
+		// compare the committee index separately.
+		if postElectra {
+			ci, err := att.GetCommitteeIndex()
 			if err != nil {
-				return nil, errors.Wrap(err, "could not get attestation data root")
+				return nil, err
 			}
-			if bytes.Equal(root[:], attDataRoot) {
-				return att, nil
+			if ci != index {
+				continue
 			}
 		}
+		root, err := att.GetData().HashTreeRoot()
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get attestation data root")
+		}
+		if bytes.Equal(root[:], attDataRoot) {
+			result = append(result, att)
+		}
 	}
-	return nil, nil
+
+	return result, nil
 }
 
 // SubmitContributionAndProofs publishes multiple signed sync committee contribution and proofs.

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

@@ -14,6 +14,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/prysmaticlabs/prysm/v5/api"
 	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
 	mockChain "github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain/testing"
@@ -35,6 +36,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
+	"github.com/prysmaticlabs/prysm/v5/crypto/bls/common"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/network/httputil"
 	ethpbalpha "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
@@ -48,292 +50,340 @@ import (
 
 func TestGetAggregateAttestation(t *testing.T) {
 	root1 := bytesutil.PadTo([]byte("root1"), 32)
-	sig1 := bytesutil.PadTo([]byte("sig1"), fieldparams.BLSSignatureLength)
-	attSlot1 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{0, 1},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            1,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root1,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root1,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root1,
-			},
-		},
-		Signature: sig1,
-	}
-	root21 := bytesutil.PadTo([]byte("root2_1"), 32)
-	sig21 := bytesutil.PadTo([]byte("sig2_1"), fieldparams.BLSSignatureLength)
-	attslot21 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{0, 1, 1},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            2,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root21,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root21,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root21,
-			},
-		},
-		Signature: sig21,
-	}
-	root22 := bytesutil.PadTo([]byte("root2_2"), 32)
-	sig22 := bytesutil.PadTo([]byte("sig2_2"), fieldparams.BLSSignatureLength)
-	attslot22 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{0, 1, 1, 1},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            2,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root22,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root22,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root22,
-			},
-		},
-		Signature: sig22,
-	}
-	root31 := bytesutil.PadTo([]byte("root3_1"), 32)
-	sig31 := bls.NewAggregateSignature().Marshal()
-	attslot31 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{1, 0},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            3,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root31,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root31,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root31,
-			},
-		},
-		Signature: sig31,
-	}
-	root32 := bytesutil.PadTo([]byte("root3_2"), 32)
-	sig32 := bls.NewAggregateSignature().Marshal()
-	attslot32 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{0, 1},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            3,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root32,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root32,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root32,
-			},
-		},
-		Signature: sig32,
-	}
+	root2 := bytesutil.PadTo([]byte("root2"), 32)
+	key, err := bls.RandKey()
+	require.NoError(t, err)
+	sig := key.Sign([]byte("sig"))
 
-	pool := attestations.NewPool()
-	err := pool.SaveAggregatedAttestations([]ethpbalpha.Att{attSlot1, attslot21, attslot22})
-	assert.NoError(t, err)
-	err = pool.SaveUnaggregatedAttestations([]ethpbalpha.Att{attslot31, attslot32})
-	assert.NoError(t, err)
+	t.Run("V1", func(t *testing.T) {
+		createAttestation := func(slot primitives.Slot, aggregationBits bitfield.Bitlist, root []byte) *ethpbalpha.Attestation {
+			return &ethpbalpha.Attestation{
+				AggregationBits: aggregationBits,
+				Data:            createAttestationData(slot, 1, 1, root),
+				Signature:       sig.Marshal(),
+			}
+		}
 
-	s := &Server{
-		AttestationsPool: pool,
-	}
+		aggSlot1_Root1_1 := createAttestation(1, bitfield.Bitlist{0b11100}, root1)
+		aggSlot1_Root1_2 := createAttestation(1, bitfield.Bitlist{0b10111}, root1)
+		aggSlot1_Root2 := createAttestation(1, bitfield.Bitlist{0b11100}, root2)
+		aggSlot2 := createAttestation(2, bitfield.Bitlist{0b11100}, root1)
+		unaggSlot3_Root1_1 := createAttestation(3, bitfield.Bitlist{0b11000}, root1)
+		unaggSlot3_Root1_2 := createAttestation(3, bitfield.Bitlist{0b10100}, root1)
+		unaggSlot3_Root2 := createAttestation(3, bitfield.Bitlist{0b11000}, root2)
+		unaggSlot4 := createAttestation(4, bitfield.Bitlist{0b11000}, root1)
 
-	t.Run("matching aggregated att", func(t *testing.T) {
-		reqRoot, err := attslot22.Data.HashTreeRoot()
+		compareResult := func(
+			t *testing.T,
+			attestation structs.Attestation,
+			expectedSlot string,
+			expectedAggregationBits string,
+			expectedRoot []byte,
+			expectedSig []byte,
+		) {
+			assert.Equal(t, expectedAggregationBits, attestation.AggregationBits, "Unexpected aggregation bits in attestation")
+			assert.Equal(t, hexutil.Encode(expectedSig), attestation.Signature, "Signature mismatch")
+			assert.Equal(t, expectedSlot, attestation.Data.Slot, "Slot mismatch in attestation data")
+			assert.Equal(t, "1", attestation.Data.CommitteeIndex, "Committee index mismatch")
+			assert.Equal(t, hexutil.Encode(expectedRoot), attestation.Data.BeaconBlockRoot, "Beacon block root mismatch")
+
+			// Source checkpoint checks
+			require.NotNil(t, attestation.Data.Source, "Source checkpoint should not be nil")
+			assert.Equal(t, "1", attestation.Data.Source.Epoch, "Source epoch mismatch")
+			assert.Equal(t, hexutil.Encode(expectedRoot), attestation.Data.Source.Root, "Source root mismatch")
+
+			// Target checkpoint checks
+			require.NotNil(t, attestation.Data.Target, "Target checkpoint should not be nil")
+			assert.Equal(t, "1", attestation.Data.Target.Epoch, "Target epoch mismatch")
+			assert.Equal(t, hexutil.Encode(expectedRoot), attestation.Data.Target.Root, "Target root mismatch")
+		}
+
+		pool := attestations.NewPool()
+		require.NoError(t, pool.SaveUnaggregatedAttestations([]ethpbalpha.Att{unaggSlot3_Root1_1, unaggSlot3_Root1_2, unaggSlot3_Root2, unaggSlot4}), "Failed to save unaggregated attestations")
+		unagg, err := pool.UnaggregatedAttestations()
 		require.NoError(t, err)
-		attDataRoot := hexutil.Encode(reqRoot[:])
-		url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=2"
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+		require.Equal(t, 4, len(unagg), "Expected 4 unaggregated attestations")
+		require.NoError(t, pool.SaveAggregatedAttestations([]ethpbalpha.Att{aggSlot1_Root1_1, aggSlot1_Root1_2, aggSlot1_Root2, aggSlot2}), "Failed to save aggregated attestations")
+		agg := pool.AggregatedAttestations()
+		require.Equal(t, 4, len(agg), "Expected 4 aggregated attestations")
+		s := &Server{
+			AttestationsPool: pool,
+		}
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusOK, writer.Code)
-		resp := &structs.AggregateAttestationResponse{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
-		require.NotNil(t, resp)
-		require.NotNil(t, resp.Data)
-		assert.DeepEqual(t, "0x00010101", resp.Data.AggregationBits)
-		assert.DeepEqual(t, hexutil.Encode(sig22), resp.Data.Signature)
-		assert.Equal(t, "2", resp.Data.Data.Slot)
-		assert.Equal(t, "1", resp.Data.Data.CommitteeIndex)
-		assert.DeepEqual(t, hexutil.Encode(root22), resp.Data.Data.BeaconBlockRoot)
-		require.NotNil(t, resp.Data.Data.Source)
-		assert.Equal(t, "1", resp.Data.Data.Source.Epoch)
-		assert.DeepEqual(t, hexutil.Encode(root22), resp.Data.Data.Source.Root)
-		require.NotNil(t, resp.Data.Data.Target)
-		assert.Equal(t, "1", resp.Data.Data.Target.Epoch)
-		assert.DeepEqual(t, hexutil.Encode(root22), resp.Data.Data.Target.Root)
+		t.Run("non-matching attestation request", func(t *testing.T) {
+			reqRoot, err := aggSlot2.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestation(writer, request)
+			assert.Equal(t, http.StatusNotFound, writer.Code, "Expected HTTP status NotFound for non-matching request")
+		})
+		t.Run("1 matching aggregated attestation", func(t *testing.T) {
+			reqRoot, err := aggSlot2.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=2"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestation(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.Attestation
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+
+			compareResult(t, attestation, "2", hexutil.Encode(aggSlot2.AggregationBits), root1, sig.Marshal())
+		})
+		t.Run("multiple matching aggregated attestations - return the one with most bits", func(t *testing.T) {
+			reqRoot, err := aggSlot1_Root1_1.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestation(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.Attestation
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+
+			compareResult(t, attestation, "1", hexutil.Encode(aggSlot1_Root1_2.AggregationBits), root1, sig.Marshal())
+		})
+		t.Run("1 matching unaggregated attestation", func(t *testing.T) {
+			reqRoot, err := unaggSlot4.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=4"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestation(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.Attestation
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+			compareResult(t, attestation, "4", hexutil.Encode(unaggSlot4.AggregationBits), root1, sig.Marshal())
+		})
+		t.Run("multiple matching unaggregated attestations - their aggregate is returned", func(t *testing.T) {
+			reqRoot, err := unaggSlot3_Root1_1.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=3"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestation(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.Attestation
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+			sig1, err := bls.SignatureFromBytes(unaggSlot3_Root1_1.Signature)
+			require.NoError(t, err)
+			sig2, err := bls.SignatureFromBytes(unaggSlot3_Root1_2.Signature)
+			require.NoError(t, err)
+			expectedSig := bls.AggregateSignatures([]common.Signature{sig1, sig2})
+			compareResult(t, attestation, "3", hexutil.Encode(bitfield.Bitlist{0b11100}), root1, expectedSig.Marshal())
+		})
 	})
-	t.Run("matching unaggregated att", func(t *testing.T) {
-		reqRoot, err := attslot32.Data.HashTreeRoot()
+	t.Run("V2", func(t *testing.T) {
+		createAttestation := func(slot primitives.Slot, aggregationBits bitfield.Bitlist, root []byte, bits uint64) *ethpbalpha.AttestationElectra {
+			committeeBits := bitfield.NewBitvector64()
+			committeeBits.SetBitAt(bits, true)
+
+			return &ethpbalpha.AttestationElectra{
+				CommitteeBits:   committeeBits,
+				AggregationBits: aggregationBits,
+				Data:            createAttestationData(slot, 0, 1, root),
+				Signature:       sig.Marshal(),
+			}
+		}
+
+		aggSlot1_Root1_1 := createAttestation(1, bitfield.Bitlist{0b11100}, root1, 1)
+		aggSlot1_Root1_2 := createAttestation(1, bitfield.Bitlist{0b10111}, root1, 1)
+		aggSlot1_Root2 := createAttestation(1, bitfield.Bitlist{0b11100}, root2, 1)
+		aggSlot2 := createAttestation(2, bitfield.Bitlist{0b11100}, root1, 1)
+		unaggSlot3_Root1_1 := createAttestation(3, bitfield.Bitlist{0b11000}, root1, 1)
+		unaggSlot3_Root1_2 := createAttestation(3, bitfield.Bitlist{0b10100}, root1, 1)
+		unaggSlot3_Root2 := createAttestation(3, bitfield.Bitlist{0b11000}, root2, 1)
+		unaggSlot4 := createAttestation(4, bitfield.Bitlist{0b11000}, root1, 1)
+
+		compareResult := func(
+			t *testing.T,
+			attestation structs.AttestationElectra,
+			expectedSlot string,
+			expectedAggregationBits string,
+			expectedRoot []byte,
+			expectedSig []byte,
+			expectedCommitteeBits string,
+		) {
+			assert.Equal(t, expectedAggregationBits, attestation.AggregationBits, "Unexpected aggregation bits in attestation")
+			assert.Equal(t, expectedCommitteeBits, attestation.CommitteeBits)
+			assert.Equal(t, hexutil.Encode(expectedSig), attestation.Signature, "Signature mismatch")
+			assert.Equal(t, expectedSlot, attestation.Data.Slot, "Slot mismatch in attestation data")
+			assert.Equal(t, "0", attestation.Data.CommitteeIndex, "Committee index mismatch")
+			assert.Equal(t, hexutil.Encode(expectedRoot), attestation.Data.BeaconBlockRoot, "Beacon block root mismatch")
+
+			// Source checkpoint checks
+			require.NotNil(t, attestation.Data.Source, "Source checkpoint should not be nil")
+			assert.Equal(t, "1", attestation.Data.Source.Epoch, "Source epoch mismatch")
+			assert.Equal(t, hexutil.Encode(expectedRoot), attestation.Data.Source.Root, "Source root mismatch")
+
+			// Target checkpoint checks
+			require.NotNil(t, attestation.Data.Target, "Target checkpoint should not be nil")
+			assert.Equal(t, "1", attestation.Data.Target.Epoch, "Target epoch mismatch")
+			assert.Equal(t, hexutil.Encode(expectedRoot), attestation.Data.Target.Root, "Target root mismatch")
+		}
+
+		pool := attestations.NewPool()
+		require.NoError(t, pool.SaveUnaggregatedAttestations([]ethpbalpha.Att{unaggSlot3_Root1_1, unaggSlot3_Root1_2, unaggSlot3_Root2, unaggSlot4}), "Failed to save unaggregated attestations")
+		unagg, err := pool.UnaggregatedAttestations()
 		require.NoError(t, err)
-		attDataRoot := hexutil.Encode(reqRoot[:])
-		url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=3"
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+		require.Equal(t, 4, len(unagg), "Expected 4 unaggregated attestations")
+		require.NoError(t, pool.SaveAggregatedAttestations([]ethpbalpha.Att{aggSlot1_Root1_1, aggSlot1_Root1_2, aggSlot1_Root2, aggSlot2}), "Failed to save aggregated attestations")
+		agg := pool.AggregatedAttestations()
+		require.Equal(t, 4, len(agg), "Expected 4 aggregated attestations")
+		bs, err := util.NewBeaconState()
+		require.NoError(t, err)
+		s := &Server{
+			ChainInfoFetcher: &mockChain.ChainService{State: bs},
+			AttestationsPool: pool,
+		}
+		t.Run("non-matching attestation request", func(t *testing.T) {
+			reqRoot, err := aggSlot2.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1" + "&committee_index=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusOK, writer.Code)
-		resp := &structs.AggregateAttestationResponse{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
-		require.NotNil(t, resp)
-		require.NotNil(t, resp.Data)
-		assert.DeepEqual(t, "0x0001", resp.Data.AggregationBits)
-		assert.DeepEqual(t, hexutil.Encode(sig32), resp.Data.Signature)
-		assert.Equal(t, "3", resp.Data.Data.Slot)
-		assert.Equal(t, "1", resp.Data.Data.CommitteeIndex)
-		assert.DeepEqual(t, hexutil.Encode(root32), resp.Data.Data.BeaconBlockRoot)
-		require.NotNil(t, resp.Data.Data.Source)
-		assert.Equal(t, "1", resp.Data.Data.Source.Epoch)
-		assert.DeepEqual(t, hexutil.Encode(root32), resp.Data.Data.Source.Root)
-		require.NotNil(t, resp.Data.Data.Target)
-		assert.Equal(t, "1", resp.Data.Data.Target.Epoch)
-		assert.DeepEqual(t, hexutil.Encode(root32), resp.Data.Data.Target.Root)
-	})
-	t.Run("no matching attestation", func(t *testing.T) {
-		attDataRoot := hexutil.Encode(bytesutil.PadTo([]byte("foo"), 32))
-		url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=2"
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+			s.GetAggregateAttestationV2(writer, request)
+			assert.Equal(t, http.StatusNotFound, writer.Code, "Expected HTTP status NotFound for non-matching request")
+		})
+		t.Run("1 matching aggregated attestation", func(t *testing.T) {
+			reqRoot, err := aggSlot2.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=2" + "&committee_index=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusNotFound, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusNotFound, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "No matching attestation found"))
-	})
-	t.Run("no attestation_data_root provided", func(t *testing.T) {
-		url := "http://example.com?slot=2"
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+			s.GetAggregateAttestationV2(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "attestation_data_root is required"))
-	})
-	t.Run("invalid attestation_data_root provided", func(t *testing.T) {
-		url := "http://example.com?attestation_data_root=foo&slot=2"
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "attestation_data_root is invalid"))
-	})
-	t.Run("no slot provided", func(t *testing.T) {
-		attDataRoot := hexutil.Encode(bytesutil.PadTo([]byte("foo"), 32))
-		url := "http://example.com?attestation_data_root=" + attDataRoot
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+			var attestation structs.AttestationElectra
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "slot is required"))
-	})
-	t.Run("invalid slot provided", func(t *testing.T) {
-		attDataRoot := hexutil.Encode(bytesutil.PadTo([]byte("foo"), 32))
-		url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=foo"
-		request := httptest.NewRequest(http.MethodGet, url, nil)
-		writer := httptest.NewRecorder()
-		writer.Body = &bytes.Buffer{}
+			compareResult(t, attestation, "2", hexutil.Encode(aggSlot2.AggregationBits), root1, sig.Marshal(), hexutil.Encode(aggSlot2.CommitteeBits))
+		})
+		t.Run("multiple matching aggregated attestations - return the one with most bits", func(t *testing.T) {
+			reqRoot, err := aggSlot1_Root1_1.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1" + "&committee_index=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
 
-		s.GetAggregateAttestation(writer, request)
-		assert.Equal(t, http.StatusBadRequest, writer.Code)
-		e := &httputil.DefaultJsonError{}
-		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
-		assert.Equal(t, http.StatusBadRequest, e.Code)
-		assert.Equal(t, true, strings.Contains(e.Message, "slot is invalid"))
+			s.GetAggregateAttestationV2(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.AttestationElectra
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+
+			compareResult(t, attestation, "1", hexutil.Encode(aggSlot1_Root1_2.AggregationBits), root1, sig.Marshal(), hexutil.Encode(aggSlot1_Root1_1.CommitteeBits))
+		})
+		t.Run("1 matching unaggregated attestation", func(t *testing.T) {
+			reqRoot, err := unaggSlot4.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=4" + "&committee_index=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestationV2(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.AttestationElectra
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+			compareResult(t, attestation, "4", hexutil.Encode(unaggSlot4.AggregationBits), root1, sig.Marshal(), hexutil.Encode(unaggSlot4.CommitteeBits))
+		})
+		t.Run("multiple matching unaggregated attestations - their aggregate is returned", func(t *testing.T) {
+			reqRoot, err := unaggSlot3_Root1_1.Data.HashTreeRoot()
+			require.NoError(t, err, "Failed to generate attestation data hash tree root")
+			attDataRoot := hexutil.Encode(reqRoot[:])
+			url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=3" + "&committee_index=1"
+			request := httptest.NewRequest(http.MethodGet, url, nil)
+			writer := httptest.NewRecorder()
+
+			s.GetAggregateAttestationV2(writer, request)
+			require.Equal(t, http.StatusOK, writer.Code, "Expected HTTP status OK")
+
+			var resp structs.AggregateAttestationResponse
+			require.NoError(t, json.Unmarshal(writer.Body.Bytes(), &resp), "Failed to unmarshal response")
+			require.NotNil(t, resp.Data, "Response data should not be nil")
+
+			var attestation structs.AttestationElectra
+			require.NoError(t, json.Unmarshal(resp.Data, &attestation), "Failed to unmarshal attestation data")
+			sig1, err := bls.SignatureFromBytes(unaggSlot3_Root1_1.Signature)
+			require.NoError(t, err)
+			sig2, err := bls.SignatureFromBytes(unaggSlot3_Root1_2.Signature)
+			require.NoError(t, err)
+			expectedSig := bls.AggregateSignatures([]common.Signature{sig1, sig2})
+			compareResult(t, attestation, "3", hexutil.Encode(bitfield.Bitlist{0b11100}), root1, expectedSig.Marshal(), hexutil.Encode(unaggSlot3_Root1_1.CommitteeBits))
+		})
 	})
 }
 
-func TestGetAggregateAttestation_SameSlotAndRoot_ReturnMostAggregationBits(t *testing.T) {
-	root := bytesutil.PadTo([]byte("root"), 32)
-	sig := bytesutil.PadTo([]byte("sig"), fieldparams.BLSSignatureLength)
-	att1 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{3, 0, 0, 1},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            1,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root,
-			},
+func createAttestationData(
+	slot primitives.Slot,
+	committeeIndex primitives.CommitteeIndex,
+	epoch primitives.Epoch,
+	root []byte,
+) *ethpbalpha.AttestationData {
+	return &ethpbalpha.AttestationData{
+		Slot:            slot,
+		CommitteeIndex:  committeeIndex,
+		BeaconBlockRoot: root,
+		Source: &ethpbalpha.Checkpoint{
+			Epoch: epoch,
+			Root:  root,
 		},
-		Signature: sig,
-	}
-	att2 := &ethpbalpha.Attestation{
-		AggregationBits: []byte{0, 3, 0, 1},
-		Data: &ethpbalpha.AttestationData{
-			Slot:            1,
-			CommitteeIndex:  1,
-			BeaconBlockRoot: root,
-			Source: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root,
-			},
-			Target: &ethpbalpha.Checkpoint{
-				Epoch: 1,
-				Root:  root,
-			},
+		Target: &ethpbalpha.Checkpoint{
+			Epoch: epoch,
+			Root:  root,
 		},
-		Signature: sig,
 	}
-	pool := attestations.NewPool()
-	err := pool.SaveAggregatedAttestations([]ethpbalpha.Att{att1, att2})
-	assert.NoError(t, err)
-	s := &Server{
-		AttestationsPool: pool,
-	}
-	reqRoot, err := att1.Data.HashTreeRoot()
-	require.NoError(t, err)
-	attDataRoot := hexutil.Encode(reqRoot[:])
-	url := "http://example.com?attestation_data_root=" + attDataRoot + "&slot=1"
-	request := httptest.NewRequest(http.MethodGet, url, nil)
-	writer := httptest.NewRecorder()
-	writer.Body = &bytes.Buffer{}
-
-	s.GetAggregateAttestation(writer, request)
-	assert.Equal(t, http.StatusOK, writer.Code)
-	resp := &structs.AggregateAttestationResponse{}
-	require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
-	require.NotNil(t, resp)
-	assert.DeepEqual(t, "0x03000001", resp.Data.AggregationBits)
 }
 
 func TestSubmitContributionAndProofs(t *testing.T) {

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

@@ -287,6 +287,9 @@ func (vs *Server) validatorStatus(
 		Status:          ethpb.ValidatorStatus_UNKNOWN_STATUS,
 		ActivationEpoch: params.BeaconConfig().FarFutureEpoch,
 	}
+	if len(pubKey) == 0 {
+		return resp, nonExistentIndex
+	}
 	vStatus, idx, err := statusForPubKey(headState, pubKey)
 	if err != nil && !errors.Is(err, errPubkeyDoesNotExist) {
 		tracing.AnnotateError(span, err)

beacon-chain/slasher/helpers.go

@@ -97,10 +97,7 @@ func (s *Service) filterAttestations(
 // detection (except for the genesis epoch).
 func validateAttestationIntegrity(att ethpb.IndexedAtt) bool {
 	// If an attestation is malformed, we drop it.
-	if att == nil ||
-		att.GetData() == nil ||
-		att.GetData().Source == nil ||
-		att.GetData().Target == nil {
+	if att == nil || att.IsNil() || att.GetData().Source == nil || att.GetData().Target == nil {
 		return false
 	}
 

beacon-chain/state/interfaces.go

@@ -316,7 +316,7 @@ type WriteOnlySyncCommittee interface {
 
 type WriteOnlyWithdrawals interface {
 	AppendPendingPartialWithdrawal(ppw *ethpb.PendingPartialWithdrawal) error
-	DequeuePartialWithdrawals(num uint64) error
+	DequeuePendingPartialWithdrawals(num uint64) error
 	SetNextWithdrawalIndex(i uint64) error
 	SetNextWithdrawalValidatorIndex(i primitives.ValidatorIndex) error
 }

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

@@ -29,7 +29,6 @@ type BeaconState struct {
 	stateRoots                          customtypes.StateRoots
 	stateRootsMultiValue                *MultiValueStateRoots
 	historicalRoots                     customtypes.HistoricalRoots
-	historicalSummaries                 []*ethpb.HistoricalSummary
 	eth1Data                            *ethpb.Eth1Data
 	eth1DataVotes                       []*ethpb.Eth1Data
 	eth1DepositIndex                    uint64
@@ -55,8 +54,11 @@ type BeaconState struct {
 	latestExecutionPayloadHeader        *enginev1.ExecutionPayloadHeader
 	latestExecutionPayloadHeaderCapella *enginev1.ExecutionPayloadHeaderCapella
 	latestExecutionPayloadHeaderDeneb   *enginev1.ExecutionPayloadHeaderDeneb
-	nextWithdrawalIndex                 uint64
-	nextWithdrawalValidatorIndex        primitives.ValidatorIndex
+
+	// Capella fields
+	nextWithdrawalIndex          uint64
+	nextWithdrawalValidatorIndex primitives.ValidatorIndex
+	historicalSummaries          []*ethpb.HistoricalSummary
 
 	// Electra fields
 	depositRequestsStartIndex     uint64
@@ -90,7 +92,6 @@ type beaconStateMarshalable struct {
 	BlockRoots                          customtypes.BlockRoots                  `json:"block_roots" yaml:"block_roots"`
 	StateRoots                          customtypes.StateRoots                  `json:"state_roots" yaml:"state_roots"`
 	HistoricalRoots                     customtypes.HistoricalRoots             `json:"historical_roots" yaml:"historical_roots"`
-	HistoricalSummaries                 []*ethpb.HistoricalSummary              `json:"historical_summaries" yaml:"historical_summaries"`
 	Eth1Data                            *ethpb.Eth1Data                         `json:"eth_1_data" yaml:"eth_1_data"`
 	Eth1DataVotes                       []*ethpb.Eth1Data                       `json:"eth_1_data_votes" yaml:"eth_1_data_votes"`
 	Eth1DepositIndex                    uint64                                  `json:"eth_1_deposit_index" yaml:"eth_1_deposit_index"`
@@ -114,6 +115,7 @@ type beaconStateMarshalable struct {
 	LatestExecutionPayloadHeaderDeneb   *enginev1.ExecutionPayloadHeaderDeneb   `json:"latest_execution_payload_header_deneb" yaml:"latest_execution_payload_header_deneb"`
 	NextWithdrawalIndex                 uint64                                  `json:"next_withdrawal_index" yaml:"next_withdrawal_index"`
 	NextWithdrawalValidatorIndex        primitives.ValidatorIndex               `json:"next_withdrawal_validator_index" yaml:"next_withdrawal_validator_index"`
+	HistoricalSummaries                 []*ethpb.HistoricalSummary              `json:"historical_summaries" yaml:"historical_summaries"`
 	DepositRequestsStartIndex           uint64                                  `json:"deposit_requests_start_index" yaml:"deposit_requests_start_index"`
 	DepositBalanceToConsume             primitives.Gwei                         `json:"deposit_balance_to_consume" yaml:"deposit_balance_to_consume"`
 	ExitBalanceToConsume                primitives.Gwei                         `json:"exit_balance_to_consume" yaml:"exit_balance_to_consume"`
@@ -159,7 +161,6 @@ func (b *BeaconState) MarshalJSON() ([]byte, error) {
 		BlockRoots:                          bRoots,
 		StateRoots:                          sRoots,
 		HistoricalRoots:                     b.historicalRoots,
-		HistoricalSummaries:                 b.historicalSummaries,
 		Eth1Data:                            b.eth1Data,
 		Eth1DataVotes:                       b.eth1DataVotes,
 		Eth1DepositIndex:                    b.eth1DepositIndex,
@@ -183,6 +184,7 @@ func (b *BeaconState) MarshalJSON() ([]byte, error) {
 		LatestExecutionPayloadHeaderDeneb:   b.latestExecutionPayloadHeaderDeneb,
 		NextWithdrawalIndex:                 b.nextWithdrawalIndex,
 		NextWithdrawalValidatorIndex:        b.nextWithdrawalValidatorIndex,
+		HistoricalSummaries:                 b.historicalSummaries,
 		DepositRequestsStartIndex:           b.depositRequestsStartIndex,
 		DepositBalanceToConsume:             b.depositBalanceToConsume,
 		ExitBalanceToConsume:                b.exitBalanceToConsume,

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

@@ -4,7 +4,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )
 
-// DepositRequestsStartIndex is used for returning the deposit receipts start index which is used for eip6110
+// DepositRequestsStartIndex is used for returning the deposit requests start index which is used for eip6110
 func (b *BeaconState) DepositRequestsStartIndex() (uint64, error) {
 	if b.version < version.Electra {
 		return 0, errNotSupported("DepositRequestsStartIndex", b.version)

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

@@ -22,12 +22,22 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 	rm := b.randaoMixesVal().Slice()
 	var vals []*ethpb.Validator
 	var bals []uint64
+	var inactivityScores []uint64
+
 	if features.Get().EnableExperimentalState {
-		vals = b.validatorsVal()
-		bals = b.balancesVal()
+		if b.balancesMultiValue != nil {
+			bals = b.balancesMultiValue.Value(b)
+		}
+		if b.inactivityScoresMultiValue != nil {
+			inactivityScores = b.inactivityScoresMultiValue.Value(b)
+		}
+		if b.validatorsMultiValue != nil {
+			vals = b.validatorsMultiValue.Value(b)
+		}
 	} else {
-		vals = b.validators
 		bals = b.balances
+		inactivityScores = b.inactivityScores
+		vals = b.validators
 	}
 
 	switch b.version {
@@ -78,7 +88,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			PreviousJustifiedCheckpoint: b.previousJustifiedCheckpoint,
 			CurrentJustifiedCheckpoint:  b.currentJustifiedCheckpoint,
 			FinalizedCheckpoint:         b.finalizedCheckpoint,
-			InactivityScores:            b.inactivityScoresVal(),
+			InactivityScores:            inactivityScores,
 			CurrentSyncCommittee:        b.currentSyncCommittee,
 			NextSyncCommittee:           b.nextSyncCommittee,
 		}
@@ -105,7 +115,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			PreviousJustifiedCheckpoint:  b.previousJustifiedCheckpoint,
 			CurrentJustifiedCheckpoint:   b.currentJustifiedCheckpoint,
 			FinalizedCheckpoint:          b.finalizedCheckpoint,
-			InactivityScores:             b.inactivityScoresVal(),
+			InactivityScores:             inactivityScores,
 			CurrentSyncCommittee:         b.currentSyncCommittee,
 			NextSyncCommittee:            b.nextSyncCommittee,
 			LatestExecutionPayloadHeader: b.latestExecutionPayloadHeader,
@@ -133,7 +143,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			PreviousJustifiedCheckpoint:  b.previousJustifiedCheckpoint,
 			CurrentJustifiedCheckpoint:   b.currentJustifiedCheckpoint,
 			FinalizedCheckpoint:          b.finalizedCheckpoint,
-			InactivityScores:             b.inactivityScoresVal(),
+			InactivityScores:             inactivityScores,
 			CurrentSyncCommittee:         b.currentSyncCommittee,
 			NextSyncCommittee:            b.nextSyncCommittee,
 			LatestExecutionPayloadHeader: b.latestExecutionPayloadHeaderCapella,
@@ -164,7 +174,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			PreviousJustifiedCheckpoint:  b.previousJustifiedCheckpoint,
 			CurrentJustifiedCheckpoint:   b.currentJustifiedCheckpoint,
 			FinalizedCheckpoint:          b.finalizedCheckpoint,
-			InactivityScores:             b.inactivityScoresVal(),
+			InactivityScores:             inactivityScores,
 			CurrentSyncCommittee:         b.currentSyncCommittee,
 			NextSyncCommittee:            b.nextSyncCommittee,
 			LatestExecutionPayloadHeader: b.latestExecutionPayloadHeaderDeneb,
@@ -195,7 +205,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			PreviousJustifiedCheckpoint:   b.previousJustifiedCheckpoint,
 			CurrentJustifiedCheckpoint:    b.currentJustifiedCheckpoint,
 			FinalizedCheckpoint:           b.finalizedCheckpoint,
-			InactivityScores:              b.inactivityScoresVal(),
+			InactivityScores:              inactivityScores,
 			CurrentSyncCommittee:          b.currentSyncCommittee,
 			NextSyncCommittee:             b.nextSyncCommittee,
 			LatestExecutionPayloadHeader:  b.latestExecutionPayloadHeaderDeneb,

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

@@ -1,6 +1,8 @@
 package state_native
 
 import (
+	"errors"
+
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native/types"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stateutil"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@@ -15,6 +17,9 @@ func (b *BeaconState) AppendPendingConsolidation(val *ethpb.PendingConsolidation
 	if b.version < version.Electra {
 		return errNotSupported("AppendPendingConsolidation", b.version)
 	}
+	if val == nil {
+		return errors.New("cannot append nil pending consolidation")
+	}
 	b.lock.Lock()
 	defer b.lock.Unlock()
 

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

@@ -1,6 +1,8 @@
 package state_native
 
 import (
+	"errors"
+
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native/types"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stateutil"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@@ -15,6 +17,9 @@ func (b *BeaconState) AppendPendingDeposit(pd *ethpb.PendingDeposit) error {
 	if b.version < version.Electra {
 		return errNotSupported("AppendPendingDeposit", b.version)
 	}
+	if pd == nil {
+		return errors.New("cannot append nil pending deposit")
+	}
 	b.lock.Lock()
 	defer b.lock.Unlock()
 

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

@@ -64,10 +64,10 @@ func (b *BeaconState) AppendPendingPartialWithdrawal(ppw *eth.PendingPartialWith
 	return nil
 }
 
-// DequeuePartialWithdrawals removes the partial withdrawals from the beginning of the partial withdrawals list.
-func (b *BeaconState) DequeuePartialWithdrawals(n uint64) error {
+// DequeuePendingPartialWithdrawals removes the partial withdrawals from the beginning of the partial withdrawals list.
+func (b *BeaconState) DequeuePendingPartialWithdrawals(n uint64) error {
 	if b.version < version.Electra {
-		return errNotSupported("DequeuePartialWithdrawals", b.version)
+		return errNotSupported("DequeuePendingPartialWithdrawals", b.version)
 	}
 
 	if n > uint64(len(b.pendingPartialWithdrawals)) {

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

@@ -68,7 +68,7 @@ func TestDequeuePendingWithdrawals(t *testing.T) {
 	num, err := s.NumPendingPartialWithdrawals()
 	require.NoError(t, err)
 	require.Equal(t, uint64(3), num)
-	require.NoError(t, s.DequeuePartialWithdrawals(2))
+	require.NoError(t, s.DequeuePendingPartialWithdrawals(2))
 	num, err = s.NumPendingPartialWithdrawals()
 	require.NoError(t, err)
 	require.Equal(t, uint64(1), num)
@@ -77,13 +77,13 @@ func TestDequeuePendingWithdrawals(t *testing.T) {
 	num, err = s.NumPendingPartialWithdrawals()
 	require.NoError(t, err)
 	require.Equal(t, uint64(1), num)
-	require.ErrorContains(t, "cannot dequeue more withdrawals than are in the queue", s.DequeuePartialWithdrawals(2))
+	require.ErrorContains(t, "cannot dequeue more withdrawals than are in the queue", s.DequeuePendingPartialWithdrawals(2))
 
 	// Removing all pending partial withdrawals should be OK.
 	num, err = s.NumPendingPartialWithdrawals()
 	require.NoError(t, err)
 	require.Equal(t, uint64(1), num)
-	require.NoError(t, s.DequeuePartialWithdrawals(1))
+	require.NoError(t, s.DequeuePendingPartialWithdrawals(1))
 	num, err = s.Copy().NumPendingPartialWithdrawals()
 	require.NoError(t, err)
 	require.Equal(t, uint64(0), num)
@@ -91,7 +91,7 @@ func TestDequeuePendingWithdrawals(t *testing.T) {
 	s, err = InitializeFromProtoDeneb(&eth.BeaconStateDeneb{})
 	require.NoError(t, err)
 
-	require.ErrorContains(t, "is not supported", s.DequeuePartialWithdrawals(0))
+	require.ErrorContains(t, "is not supported", s.DequeuePendingPartialWithdrawals(0))
 }
 
 func TestAppendPendingWithdrawals(t *testing.T) {

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

@@ -14,7 +14,7 @@ func (b *BeaconState) ProportionalSlashingMultiplier() (uint64, error) {
 	case version.Phase0:
 		return params.BeaconConfig().ProportionalSlashingMultiplier, nil
 	}
-	return 0, errNotSupported("ProportionalSlashingMultiplier()", b.version)
+	return 0, errNotSupported("ProportionalSlashingMultiplier", b.version)
 }
 
 func (b *BeaconState) InactivityPenaltyQuotient() (uint64, error) {
@@ -26,5 +26,5 @@ func (b *BeaconState) InactivityPenaltyQuotient() (uint64, error) {
 	case version.Phase0:
 		return params.BeaconConfig().InactivityPenaltyQuotient, nil
 	}
-	return 0, errNotSupported("InactivityPenaltyQuotient()", b.version)
+	return 0, errNotSupported("InactivityPenaltyQuotient", b.version)
 }

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

@@ -96,10 +96,10 @@ var denebFields = append(
 
 var electraFields = append(
 	altairFields,
+	types.LatestExecutionPayloadHeaderDeneb,
 	types.NextWithdrawalIndex,
 	types.NextWithdrawalValidatorIndex,
 	types.HistoricalSummaries,
-	types.LatestExecutionPayloadHeaderDeneb,
 	types.DepositRequestsStartIndex,
 	types.DepositBalanceToConsume,
 	types.ExitBalanceToConsume,

beacon-chain/sync/subscriber_beacon_blocks.go

@@ -12,6 +12,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/io/file"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
 	"google.golang.org/protobuf/proto"
 )
@@ -62,6 +63,10 @@ func (s *Service) beaconBlockSubscriber(ctx context.Context, msg proto.Message)
 // This function reconstructs the blob sidecars from the EL using the block's KZG commitments,
 // broadcasts the reconstructed blobs over P2P, and saves them into the blob storage.
 func (s *Service) reconstructAndBroadcastBlobs(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock) {
+	if block.Version() < version.Deneb {
+		return
+	}
+
 	startTime, err := slots.ToTime(uint64(s.cfg.chain.GenesisTime().Unix()), block.Block().Slot())
 	if err != nil {
 		log.WithError(err).Error("Failed to convert slot to time")

beacon-chain/sync/validate_aggregate_proof.go

@@ -57,11 +57,10 @@ func (s *Service) validateAggregateAndProof(ctx context.Context, pid peer.ID, ms
 	}
 
 	aggregate := m.AggregateAttestationAndProof().AggregateVal()
-	data := aggregate.GetData()
-
 	if err := helpers.ValidateNilAttestation(aggregate); err != nil {
 		return pubsub.ValidationReject, err
 	}
+	data := aggregate.GetData()
 	// Do not process slot 0 aggregates.
 	if data.Slot == 0 {
 		return pubsub.ValidationIgnore, nil

beacon-chain/sync/validate_beacon_attestation.go

@@ -62,12 +62,11 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(ctx context.Context, p
 	if !ok {
 		return pubsub.ValidationReject, errWrongMessage
 	}
-
-	data := att.GetData()
-
 	if err := helpers.ValidateNilAttestation(att); err != nil {
 		return pubsub.ValidationReject, err
 	}
+	data := att.GetData()
+
 	// Do not process slot 0 attestations.
 	if data.Slot == 0 {
 		return pubsub.ValidationIgnore, nil

config/fieldparams/mainnet.go

@@ -37,6 +37,7 @@ const (
 	SyncCommitteeBranchDepth              = 5             // SyncCommitteeBranchDepth defines the number of leaves in a merkle proof of a sync committee.
 	SyncCommitteeBranchDepthElectra       = 6             // SyncCommitteeBranchDepthElectra defines the number of leaves in a merkle proof of a sync committee.
 	FinalityBranchDepth                   = 6             // FinalityBranchDepth defines the number of leaves in a merkle proof of the finalized checkpoint root.
+	FinalityBranchDepthElectra            = 7             // FinalityBranchDepthElectra defines the number of leaves in a merkle proof of the finalized checkpoint root.
 	PendingDepositsLimit                  = 134217728     // Maximum number of pending balance deposits in the beacon state.
 	PendingPartialWithdrawalsLimit        = 134217728     // Maximum number of pending partial withdrawals in the beacon state.
 	PendingConsolidationsLimit            = 262144        // Maximum number of pending consolidations in the beacon state.

config/fieldparams/minimal.go

@@ -37,6 +37,7 @@ const (
 	SyncCommitteeBranchDepth              = 5             // SyncCommitteeBranchDepth defines the number of leaves in a merkle proof of a sync committee.
 	SyncCommitteeBranchDepthElectra       = 6             // SyncCommitteeBranchDepthElectra defines the number of leaves in a merkle proof of a sync committee.
 	FinalityBranchDepth                   = 6             // FinalityBranchDepth defines the number of leaves in a merkle proof of the finalized checkpoint root.
+	FinalityBranchDepthElectra            = 7             // FinalityBranchDepthElectra defines the number of leaves in a merkle proof of the finalized checkpoint root.
 	PendingDepositsLimit                  = 134217728     // Maximum number of pending balance deposits in the beacon state.
 	PendingPartialWithdrawalsLimit        = 64            // Maximum number of pending partial withdrawals in the beacon state.
 	PendingConsolidationsLimit            = 64            // Maximum number of pending consolidations in the beacon state.

config/params/config.go

@@ -166,6 +166,7 @@ type BeaconChainConfig struct {
 	DenebForkEpoch       primitives.Epoch `yaml:"DENEB_FORK_EPOCH" spec:"true"`       // DenebForkEpoch is used to represent the assigned fork epoch for deneb.
 	ElectraForkVersion   []byte           `yaml:"ELECTRA_FORK_VERSION" spec:"true"`   // ElectraForkVersion is used to represent the fork version for electra.
 	ElectraForkEpoch     primitives.Epoch `yaml:"ELECTRA_FORK_EPOCH" spec:"true"`     // ElectraForkEpoch is used to represent the assigned fork epoch for electra.
+	Eip7594ForkEpoch     primitives.Epoch `yaml:"EIP7594_FORK_EPOCH" spec:"true"`     // EIP7594ForkEpoch is used to represent the assigned fork epoch for peer das.
 
 	ForkVersionSchedule map[[fieldparams.VersionLength]byte]primitives.Epoch // Schedule of fork epochs by version.
 	ForkVersionNames    map[[fieldparams.VersionLength]byte]string           // Human-readable names of fork versions.
@@ -255,6 +256,13 @@ type BeaconChainConfig struct {
 	MaxDepositRequestsPerPayload          uint64 `yaml:"MAX_DEPOSIT_REQUESTS_PER_PAYLOAD" spec:"true"`           // MaxDepositRequestsPerPayload is the maximum number of execution layer deposits in each payload
 	UnsetDepositRequestsStartIndex        uint64 `yaml:"UNSET_DEPOSIT_REQUESTS_START_INDEX" spec:"true"`         // UnsetDepositRequestsStartIndex is used to check the start index for eip6110
 
+	// PeerDAS Values
+	SamplesPerSlot                        uint64           `yaml:"SAMPLES_PER_SLOT"`                             // SamplesPerSlot refers to the number of random samples a node queries per slot.
+	CustodyRequirement                    uint64           `yaml:"CUSTODY_REQUIREMENT"`                          // CustodyRequirement refers to the minimum amount of subnets a peer must custody and serve samples from.
+	MinEpochsForDataColumnSidecarsRequest primitives.Epoch `yaml:"MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS"` // MinEpochsForDataColumnSidecarsRequest is the minimum number of epochs the node will keep the data columns for.
+	MaxCellsInExtendedMatrix              uint64           `yaml:"MAX_CELLS_IN_EXTENDED_MATRIX" spec:"true"`     // MaxCellsInExtendedMatrix is the full data of one-dimensional erasure coding extended blobs (in row major format).
+	NumberOfColumns                       uint64           `yaml:"NUMBER_OF_COLUMNS" spec:"true"`                // NumberOfColumns in the extended data matrix.
+
 	// Networking Specific Parameters
 	GossipMaxSize                   uint64          `yaml:"GOSSIP_MAX_SIZE" spec:"true"`                    // GossipMaxSize is the maximum allowed size of uncompressed gossip messages.
 	MaxChunkSize                    uint64          `yaml:"MAX_CHUNK_SIZE" spec:"true"`                     // MaxChunkSize is the maximum allowed size of uncompressed req/resp chunked responses.
@@ -272,10 +280,6 @@ type BeaconChainConfig struct {
 	AttestationSubnetPrefixBits     uint64          `yaml:"ATTESTATION_SUBNET_PREFIX_BITS" spec:"true"`     // AttestationSubnetPrefixBits is defined as (ceillog2(ATTESTATION_SUBNET_COUNT) + ATTESTATION_SUBNET_EXTRA_BITS).
 	SubnetsPerNode                  uint64          `yaml:"SUBNETS_PER_NODE" spec:"true"`                   // SubnetsPerNode is the number of long-lived subnets a beacon node should be subscribed to.
 	NodeIdBits                      uint64          `yaml:"NODE_ID_BITS" spec:"true"`                       // NodeIdBits defines the bit length of a node id.
-
-	// PeerDAS
-	NumberOfColumns          uint64 `yaml:"NUMBER_OF_COLUMNS" spec:"true"`            // NumberOfColumns in the extended data matrix.
-	MaxCellsInExtendedMatrix uint64 `yaml:"MAX_CELLS_IN_EXTENDED_MATRIX" spec:"true"` // MaxCellsInExtendedMatrix is the full data of one-dimensional erasure coding extended blobs (in row major format).
 }
 
 // InitializeForkSchedule initializes the schedules forks baked into the config.
@@ -360,6 +364,12 @@ func DenebEnabled() bool {
 	return BeaconConfig().DenebForkEpoch < math.MaxUint64
 }
 
+// PeerDASEnabled centralizes the check to determine if code paths
+// that are specific to peerdas should be allowed to execute.
+func PeerDASEnabled() bool {
+	return BeaconConfig().Eip7594ForkEpoch < math.MaxUint64
+}
+
 // WithinDAPeriod checks if the block epoch is within MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS of the given current epoch.
 func WithinDAPeriod(block, current primitives.Epoch) bool {
 	return block+BeaconConfig().MinEpochsForBlobsSidecarsRequest >= current

config/params/loader_test.go

@@ -25,12 +25,10 @@ import (
 // IMPORTANT: Use one field per line and sort these alphabetically to reduce conflicts.
 var placeholderFields = []string{
 	"BYTES_PER_LOGS_BLOOM", // Compile time constant on ExecutionPayload.logs_bloom.
-	"CUSTODY_REQUIREMENT",
 	"EIP6110_FORK_EPOCH",
 	"EIP6110_FORK_VERSION",
 	"EIP7002_FORK_EPOCH",
 	"EIP7002_FORK_VERSION",
-	"EIP7594_FORK_EPOCH",
 	"EIP7594_FORK_VERSION",
 	"EIP7732_FORK_EPOCH",
 	"EIP7732_FORK_VERSION",
@@ -43,7 +41,6 @@ var placeholderFields = []string{
 	"MAX_REQUEST_PAYLOADS",           // Compile time constant on BeaconBlockBody.ExecutionRequests
 	"MAX_TRANSACTIONS_PER_PAYLOAD",   // Compile time constant on ExecutionPayload.transactions.
 	"REORG_HEAD_WEIGHT_THRESHOLD",
-	"SAMPLES_PER_SLOT",
 	"TARGET_NUMBER_OF_PEERS",
 	"UPDATE_TIMEOUT",
 	"WHISK_EPOCHS_PER_SHUFFLING_PHASE",

config/params/mainnet_config.go

@@ -216,6 +216,7 @@ var mainnetBeaconConfig = &BeaconChainConfig{
 	DenebForkEpoch:       mainnetDenebForkEpoch,
 	ElectraForkVersion:   []byte{5, 0, 0, 0},
 	ElectraForkEpoch:     mainnetElectraForkEpoch,
+	Eip7594ForkEpoch:     math.MaxUint64,
 
 	// New values introduced in Altair hard fork 1.
 	// Participation flag indices.
@@ -295,8 +296,11 @@ var mainnetBeaconConfig = &BeaconChainConfig{
 	UnsetDepositRequestsStartIndex:        math.MaxUint64,
 
 	// PeerDAS
-	NumberOfColumns:          128,
-	MaxCellsInExtendedMatrix: 768,
+	NumberOfColumns:                       128,
+	MaxCellsInExtendedMatrix:              768,
+	SamplesPerSlot:                        8,
+	CustodyRequirement:                    4,
+	MinEpochsForDataColumnSidecarsRequest: 4096,
 
 	// Values related to networking parameters.
 	GossipMaxSize:                   10 * 1 << 20, // 10 MiB

consensus-types/interfaces/light_client.go

@@ -5,15 +5,18 @@ import (
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"google.golang.org/protobuf/proto"
 )
 
 type LightClientExecutionBranch = [fieldparams.ExecutionBranchDepth][fieldparams.RootLength]byte
 type LightClientSyncCommitteeBranch = [fieldparams.SyncCommitteeBranchDepth][fieldparams.RootLength]byte
 type LightClientSyncCommitteeBranchElectra = [fieldparams.SyncCommitteeBranchDepthElectra][fieldparams.RootLength]byte
 type LightClientFinalityBranch = [fieldparams.FinalityBranchDepth][fieldparams.RootLength]byte
+type LightClientFinalityBranchElectra = [fieldparams.FinalityBranchDepthElectra][fieldparams.RootLength]byte
 
 type LightClientHeader interface {
 	ssz.Marshaler
+	Proto() proto.Message
 	Version() int
 	Beacon() *pb.BeaconBlockHeader
 	Execution() (ExecutionData, error)
@@ -31,29 +34,41 @@ type LightClientBootstrap interface {
 
 type LightClientUpdate interface {
 	ssz.Marshaler
+	Proto() proto.Message
 	Version() int
 	AttestedHeader() LightClientHeader
+	SetAttestedHeader(header LightClientHeader) error
 	NextSyncCommittee() *pb.SyncCommittee
+	SetNextSyncCommittee(sc *pb.SyncCommittee)
 	NextSyncCommitteeBranch() (LightClientSyncCommitteeBranch, error)
+	SetNextSyncCommitteeBranch(branch [][]byte) error
 	NextSyncCommitteeBranchElectra() (LightClientSyncCommitteeBranchElectra, error)
 	FinalizedHeader() LightClientHeader
-	FinalityBranch() LightClientFinalityBranch
+	SetFinalizedHeader(header LightClientHeader) error
+	FinalityBranch() (LightClientFinalityBranch, error)
+	FinalityBranchElectra() (LightClientFinalityBranchElectra, error)
+	SetFinalityBranch(branch [][]byte) error
 	SyncAggregate() *pb.SyncAggregate
+	SetSyncAggregate(sa *pb.SyncAggregate)
 	SignatureSlot() primitives.Slot
+	SetSignatureSlot(slot primitives.Slot)
 }
 
 type LightClientFinalityUpdate interface {
 	ssz.Marshaler
+	Proto() proto.Message
 	Version() int
 	AttestedHeader() LightClientHeader
 	FinalizedHeader() LightClientHeader
-	FinalityBranch() LightClientFinalityBranch
+	FinalityBranch() (LightClientFinalityBranch, error)
+	FinalityBranchElectra() (LightClientFinalityBranchElectra, error)
 	SyncAggregate() *pb.SyncAggregate
 	SignatureSlot() primitives.Slot
 }
 
 type LightClientOptimisticUpdate interface {
 	ssz.Marshaler
+	Proto() proto.Message
 	Version() int
 	AttestedHeader() LightClientHeader
 	SyncAggregate() *pb.SyncAggregate

consensus-types/light-client/BUILD.bazel

@@ -14,6 +14,7 @@ go_library(
     visibility = ["//visibility:public"],
     deps = [
         "//config/fieldparams:go_default_library",
+        "//config/params:go_default_library",
         "//consensus-types:go_default_library",
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/interfaces:go_default_library",
@@ -21,6 +22,7 @@ go_library(
         "//encoding/bytesutil:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//runtime/version:go_default_library",
+        "//time/slots:go_default_library",
         "@org_golang_google_protobuf//proto:go_default_library",
     ],
 )

consensus-types/light-client/bootstrap.go

@@ -41,7 +41,7 @@ func NewWrappedBootstrapAltair(p *pb.LightClientBootstrapAltair) (interfaces.Lig
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	header, err := NewWrappedHeaderAltair(p.Header)
+	header, err := NewWrappedHeader(p.Header)
 	if err != nil {
 		return nil, err
 	}
@@ -105,7 +105,7 @@ func NewWrappedBootstrapCapella(p *pb.LightClientBootstrapCapella) (interfaces.L
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	header, err := NewWrappedHeaderCapella(p.Header)
+	header, err := NewWrappedHeader(p.Header)
 	if err != nil {
 		return nil, err
 	}
@@ -169,7 +169,7 @@ func NewWrappedBootstrapDeneb(p *pb.LightClientBootstrapDeneb) (interfaces.Light
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	header, err := NewWrappedHeaderDeneb(p.Header)
+	header, err := NewWrappedHeader(p.Header)
 	if err != nil {
 		return nil, err
 	}
@@ -233,7 +233,7 @@ func NewWrappedBootstrapElectra(p *pb.LightClientBootstrapElectra) (interfaces.L
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	header, err := NewWrappedHeaderDeneb(p.Header)
+	header, err := NewWrappedHeader(p.Header)
 	if err != nil {
 		return nil, err
 	}

consensus-types/light-client/finality_update.go

@@ -23,11 +23,72 @@ func NewWrappedFinalityUpdate(m proto.Message) (interfaces.LightClientFinalityUp
 		return NewWrappedFinalityUpdateCapella(t)
 	case *pb.LightClientFinalityUpdateDeneb:
 		return NewWrappedFinalityUpdateDeneb(t)
+	case *pb.LightClientFinalityUpdateElectra:
+		return NewWrappedFinalityUpdateElectra(t)
 	default:
 		return nil, fmt.Errorf("cannot construct light client finality update from type %T", t)
 	}
 }
 
+func NewFinalityUpdateFromUpdate(update interfaces.LightClientUpdate) (interfaces.LightClientFinalityUpdate, error) {
+	switch t := update.(type) {
+	case *updateAltair:
+		return &finalityUpdateAltair{
+			p: &pb.LightClientFinalityUpdateAltair{
+				AttestedHeader:  t.p.AttestedHeader,
+				FinalizedHeader: t.p.FinalizedHeader,
+				FinalityBranch:  t.p.FinalityBranch,
+				SyncAggregate:   t.p.SyncAggregate,
+				SignatureSlot:   t.p.SignatureSlot,
+			},
+			attestedHeader:  t.attestedHeader,
+			finalizedHeader: t.finalizedHeader,
+			finalityBranch:  t.finalityBranch,
+		}, nil
+	case *updateCapella:
+		return &finalityUpdateCapella{
+			p: &pb.LightClientFinalityUpdateCapella{
+				AttestedHeader:  t.p.AttestedHeader,
+				FinalizedHeader: t.p.FinalizedHeader,
+				FinalityBranch:  t.p.FinalityBranch,
+				SyncAggregate:   t.p.SyncAggregate,
+				SignatureSlot:   t.p.SignatureSlot,
+			},
+			attestedHeader:  t.attestedHeader,
+			finalizedHeader: t.finalizedHeader,
+			finalityBranch:  t.finalityBranch,
+		}, nil
+	case *updateDeneb:
+		return &finalityUpdateDeneb{
+			p: &pb.LightClientFinalityUpdateDeneb{
+				AttestedHeader:  t.p.AttestedHeader,
+				FinalizedHeader: t.p.FinalizedHeader,
+				FinalityBranch:  t.p.FinalityBranch,
+				SyncAggregate:   t.p.SyncAggregate,
+				SignatureSlot:   t.p.SignatureSlot,
+			},
+			attestedHeader:  t.attestedHeader,
+			finalizedHeader: t.finalizedHeader,
+			finalityBranch:  t.finalityBranch,
+		}, nil
+	case *updateElectra:
+		return &finalityUpdateElectra{
+			p: &pb.LightClientFinalityUpdateElectra{
+				AttestedHeader:  t.p.AttestedHeader,
+				FinalizedHeader: t.p.FinalizedHeader,
+				FinalityBranch:  t.p.FinalityBranch,
+				SyncAggregate:   t.p.SyncAggregate,
+				SignatureSlot:   t.p.SignatureSlot,
+			},
+			attestedHeader:  t.attestedHeader,
+			finalizedHeader: t.finalizedHeader,
+			finalityBranch:  t.finalityBranch,
+		}, nil
+	default:
+		return nil, fmt.Errorf("unsupported type %T", t)
+	}
+}
+
 type finalityUpdateAltair struct {
 	p               *pb.LightClientFinalityUpdateAltair
 	attestedHeader  interfaces.LightClientHeader
@@ -41,11 +102,11 @@ func NewWrappedFinalityUpdateAltair(p *pb.LightClientFinalityUpdateAltair) (inte
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderAltair(p.AttestedHeader)
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderAltair(p.FinalizedHeader)
+	finalizedHeader, err := NewWrappedHeader(p.FinalizedHeader)
 	if err != nil {
 		return nil, err
 	}
@@ -78,6 +139,10 @@ func (u *finalityUpdateAltair) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *finalityUpdateAltair) Proto() proto.Message {
+	return u.p
+}
+
 func (u *finalityUpdateAltair) Version() int {
 	return version.Altair
 }
@@ -90,8 +155,12 @@ func (u *finalityUpdateAltair) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *finalityUpdateAltair) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *finalityUpdateAltair) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *finalityUpdateAltair) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return interfaces.LightClientFinalityBranchElectra{}, consensustypes.ErrNotSupported("FinalityBranchElectra", u.Version())
 }
 
 func (u *finalityUpdateAltair) SyncAggregate() *pb.SyncAggregate {
@@ -115,11 +184,11 @@ func NewWrappedFinalityUpdateCapella(p *pb.LightClientFinalityUpdateCapella) (in
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderCapella(p.AttestedHeader)
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderCapella(p.FinalizedHeader)
+	finalizedHeader, err := NewWrappedHeader(p.FinalizedHeader)
 	if err != nil {
 		return nil, err
 	}
@@ -152,6 +221,10 @@ func (u *finalityUpdateCapella) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *finalityUpdateCapella) Proto() proto.Message {
+	return u.p
+}
+
 func (u *finalityUpdateCapella) Version() int {
 	return version.Capella
 }
@@ -164,8 +237,12 @@ func (u *finalityUpdateCapella) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *finalityUpdateCapella) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *finalityUpdateCapella) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *finalityUpdateCapella) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return interfaces.LightClientFinalityBranchElectra{}, consensustypes.ErrNotSupported("FinalityBranchElectra", u.Version())
 }
 
 func (u *finalityUpdateCapella) SyncAggregate() *pb.SyncAggregate {
@@ -189,11 +266,11 @@ func NewWrappedFinalityUpdateDeneb(p *pb.LightClientFinalityUpdateDeneb) (interf
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderDeneb(p.AttestedHeader)
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderDeneb(p.FinalizedHeader)
+	finalizedHeader, err := NewWrappedHeader(p.FinalizedHeader)
 	if err != nil {
 		return nil, err
 	}
@@ -226,6 +303,10 @@ func (u *finalityUpdateDeneb) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *finalityUpdateDeneb) Proto() proto.Message {
+	return u.p
+}
+
 func (u *finalityUpdateDeneb) Version() int {
 	return version.Deneb
 }
@@ -238,8 +319,12 @@ func (u *finalityUpdateDeneb) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *finalityUpdateDeneb) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *finalityUpdateDeneb) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *finalityUpdateDeneb) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return interfaces.LightClientFinalityBranchElectra{}, consensustypes.ErrNotSupported("FinalityBranchElectra", u.Version())
 }
 
 func (u *finalityUpdateDeneb) SyncAggregate() *pb.SyncAggregate {
@@ -249,3 +334,86 @@ func (u *finalityUpdateDeneb) SyncAggregate() *pb.SyncAggregate {
 func (u *finalityUpdateDeneb) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
+
+type finalityUpdateElectra struct {
+	p               *pb.LightClientFinalityUpdateElectra
+	attestedHeader  interfaces.LightClientHeader
+	finalizedHeader interfaces.LightClientHeader
+	finalityBranch  interfaces.LightClientFinalityBranchElectra
+}
+
+var _ interfaces.LightClientFinalityUpdate = &finalityUpdateElectra{}
+
+func NewWrappedFinalityUpdateElectra(p *pb.LightClientFinalityUpdateElectra) (interfaces.LightClientFinalityUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeader(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+
+	finalityBranch, err := createBranch[interfaces.LightClientFinalityBranchElectra](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepthElectra,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &finalityUpdateElectra{
+		p:               p,
+		attestedHeader:  attestedHeader,
+		finalizedHeader: finalizedHeader,
+		finalityBranch:  finalityBranch,
+	}, nil
+}
+
+func (u *finalityUpdateElectra) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *finalityUpdateElectra) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *finalityUpdateElectra) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *finalityUpdateElectra) Proto() proto.Message {
+	return u.p
+}
+
+func (u *finalityUpdateElectra) Version() int {
+	return version.Electra
+}
+
+func (u *finalityUpdateElectra) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *finalityUpdateElectra) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *finalityUpdateElectra) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return interfaces.LightClientFinalityBranch{}, consensustypes.ErrNotSupported("FinalityBranch", u.Version())
+}
+
+func (u *finalityUpdateElectra) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *finalityUpdateElectra) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *finalityUpdateElectra) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}

consensus-types/light-client/header.go

@@ -4,11 +4,13 @@ import (
 	"fmt"
 
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
 	consensustypes "github.com/prysmaticlabs/prysm/v5/consensus-types"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -22,6 +24,9 @@ func NewWrappedHeader(m proto.Message) (interfaces.LightClientHeader, error) {
 	case *pb.LightClientHeaderCapella:
 		return NewWrappedHeaderCapella(t)
 	case *pb.LightClientHeaderDeneb:
+		if slots.ToEpoch(t.Beacon.Slot) >= params.BeaconConfig().ElectraForkEpoch {
+			return NewWrappedHeaderElectra(t)
+		}
 		return NewWrappedHeaderDeneb(t)
 	default:
 		return nil, fmt.Errorf("cannot construct light client header from type %T", t)
@@ -53,6 +58,10 @@ func (h *headerAltair) SizeSSZ() int {
 	return h.p.SizeSSZ()
 }
 
+func (h *headerAltair) Proto() proto.Message {
+	return h.p
+}
+
 func (h *headerAltair) Version() int {
 	return version.Altair
 }
@@ -62,11 +71,11 @@ func (h *headerAltair) Beacon() *pb.BeaconBlockHeader {
 }
 
 func (h *headerAltair) Execution() (interfaces.ExecutionData, error) {
-	return nil, consensustypes.ErrNotSupported("Execution", version.Altair)
+	return nil, consensustypes.ErrNotSupported("Execution", h.Version())
 }
 
 func (h *headerAltair) ExecutionBranch() (interfaces.LightClientExecutionBranch, error) {
-	return interfaces.LightClientExecutionBranch{}, consensustypes.ErrNotSupported("ExecutionBranch", version.Altair)
+	return interfaces.LightClientExecutionBranch{}, consensustypes.ErrNotSupported("ExecutionBranch", h.Version())
 }
 
 type headerCapella struct {
@@ -114,6 +123,10 @@ func (h *headerCapella) SizeSSZ() int {
 	return h.p.SizeSSZ()
 }
 
+func (h *headerCapella) Proto() proto.Message {
+	return h.p
+}
+
 func (h *headerCapella) Version() int {
 	return version.Capella
 }
@@ -175,6 +188,10 @@ func (h *headerDeneb) SizeSSZ() int {
 	return h.p.SizeSSZ()
 }
 
+func (h *headerDeneb) Proto() proto.Message {
+	return h.p
+}
+
 func (h *headerDeneb) Version() int {
 	return version.Deneb
 }
@@ -190,3 +207,68 @@ func (h *headerDeneb) Execution() (interfaces.ExecutionData, error) {
 func (h *headerDeneb) ExecutionBranch() (interfaces.LightClientExecutionBranch, error) {
 	return h.executionBranch, nil
 }
+
+type headerElectra struct {
+	p               *pb.LightClientHeaderDeneb
+	execution       interfaces.ExecutionData
+	executionBranch interfaces.LightClientExecutionBranch
+}
+
+var _ interfaces.LightClientHeader = &headerElectra{}
+
+func NewWrappedHeaderElectra(p *pb.LightClientHeaderDeneb) (interfaces.LightClientHeader, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	execution, err := blocks.WrappedExecutionPayloadHeaderDeneb(p.Execution)
+	if err != nil {
+		return nil, err
+	}
+
+	branch, err := createBranch[interfaces.LightClientExecutionBranch](
+		"execution",
+		p.ExecutionBranch,
+		fieldparams.ExecutionBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &headerElectra{
+		p:               p,
+		execution:       execution,
+		executionBranch: branch,
+	}, nil
+}
+
+func (h *headerElectra) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *headerElectra) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *headerElectra) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *headerElectra) Proto() proto.Message {
+	return h.p
+}
+
+func (h *headerElectra) Version() int {
+	return version.Electra
+}
+
+func (h *headerElectra) Beacon() *pb.BeaconBlockHeader {
+	return h.p.Beacon
+}
+
+func (h *headerElectra) Execution() (interfaces.ExecutionData, error) {
+	return h.execution, nil
+}
+
+func (h *headerElectra) ExecutionBranch() (interfaces.LightClientExecutionBranch, error) {
+	return h.executionBranch, nil
+}

consensus-types/light-client/helpers.go

@@ -4,12 +4,11 @@ import (
 	"fmt"
 
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 )
 
 type branchConstraint interface {
-	~interfaces.LightClientExecutionBranch | ~interfaces.LightClientSyncCommitteeBranch | ~interfaces.LightClientFinalityBranch
+	[4][fieldparams.RootLength]byte | [5][fieldparams.RootLength]byte | [6][fieldparams.RootLength]byte | [7][fieldparams.RootLength]byte
 }
 
 func createBranch[T branchConstraint](name string, input [][]byte, depth int) (T, error) {

consensus-types/light-client/optimistic_update.go

@@ -27,12 +27,55 @@ func NewWrappedOptimisticUpdate(m proto.Message) (interfaces.LightClientOptimist
 	}
 }
 
-type OptimisticUpdateAltair struct {
+func NewOptimisticUpdateFromUpdate(update interfaces.LightClientUpdate) (interfaces.LightClientOptimisticUpdate, error) {
+	switch t := update.(type) {
+	case *updateAltair:
+		return &optimisticUpdateAltair{
+			p: &pb.LightClientOptimisticUpdateAltair{
+				AttestedHeader: t.p.AttestedHeader,
+				SyncAggregate:  t.p.SyncAggregate,
+				SignatureSlot:  t.p.SignatureSlot,
+			},
+			attestedHeader: t.attestedHeader,
+		}, nil
+	case *updateCapella:
+		return &optimisticUpdateCapella{
+			p: &pb.LightClientOptimisticUpdateCapella{
+				AttestedHeader: t.p.AttestedHeader,
+				SyncAggregate:  t.p.SyncAggregate,
+				SignatureSlot:  t.p.SignatureSlot,
+			},
+			attestedHeader: t.attestedHeader,
+		}, nil
+	case *updateDeneb:
+		return &optimisticUpdateDeneb{
+			p: &pb.LightClientOptimisticUpdateDeneb{
+				AttestedHeader: t.p.AttestedHeader,
+				SyncAggregate:  t.p.SyncAggregate,
+				SignatureSlot:  t.p.SignatureSlot,
+			},
+			attestedHeader: t.attestedHeader,
+		}, nil
+	case *updateElectra:
+		return &optimisticUpdateDeneb{
+			p: &pb.LightClientOptimisticUpdateDeneb{
+				AttestedHeader: t.p.AttestedHeader,
+				SyncAggregate:  t.p.SyncAggregate,
+				SignatureSlot:  t.p.SignatureSlot,
+			},
+			attestedHeader: t.attestedHeader,
+		}, nil
+	default:
+		return nil, fmt.Errorf("unsupported type %T", t)
+	}
+}
+
+type optimisticUpdateAltair struct {
 	p              *pb.LightClientOptimisticUpdateAltair
 	attestedHeader interfaces.LightClientHeader
 }
 
-var _ interfaces.LightClientOptimisticUpdate = &OptimisticUpdateAltair{}
+var _ interfaces.LightClientOptimisticUpdate = &optimisticUpdateAltair{}
 
 func NewWrappedOptimisticUpdateAltair(p *pb.LightClientOptimisticUpdateAltair) (interfaces.LightClientOptimisticUpdate, error) {
 	if p == nil {
@@ -43,46 +86,50 @@ func NewWrappedOptimisticUpdateAltair(p *pb.LightClientOptimisticUpdateAltair) (
 		return nil, err
 	}
 
-	return &OptimisticUpdateAltair{
+	return &optimisticUpdateAltair{
 		p:              p,
 		attestedHeader: attestedHeader,
 	}, nil
 }
 
-func (u *OptimisticUpdateAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
+func (u *optimisticUpdateAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
 	return u.p.MarshalSSZTo(dst)
 }
 
-func (u *OptimisticUpdateAltair) MarshalSSZ() ([]byte, error) {
+func (u *optimisticUpdateAltair) MarshalSSZ() ([]byte, error) {
 	return u.p.MarshalSSZ()
 }
 
-func (u *OptimisticUpdateAltair) SizeSSZ() int {
+func (u *optimisticUpdateAltair) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
-func (u *OptimisticUpdateAltair) Version() int {
+func (u *optimisticUpdateAltair) Proto() proto.Message {
+	return u.p
+}
+
+func (u *optimisticUpdateAltair) Version() int {
 	return version.Altair
 }
 
-func (u *OptimisticUpdateAltair) AttestedHeader() interfaces.LightClientHeader {
+func (u *optimisticUpdateAltair) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
-func (u *OptimisticUpdateAltair) SyncAggregate() *pb.SyncAggregate {
+func (u *optimisticUpdateAltair) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
-func (u *OptimisticUpdateAltair) SignatureSlot() primitives.Slot {
+func (u *optimisticUpdateAltair) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
 
-type OptimisticUpdateCapella struct {
+type optimisticUpdateCapella struct {
 	p              *pb.LightClientOptimisticUpdateCapella
 	attestedHeader interfaces.LightClientHeader
 }
 
-var _ interfaces.LightClientOptimisticUpdate = &OptimisticUpdateCapella{}
+var _ interfaces.LightClientOptimisticUpdate = &optimisticUpdateCapella{}
 
 func NewWrappedOptimisticUpdateCapella(p *pb.LightClientOptimisticUpdateCapella) (interfaces.LightClientOptimisticUpdate, error) {
 	if p == nil {
@@ -93,46 +140,50 @@ func NewWrappedOptimisticUpdateCapella(p *pb.LightClientOptimisticUpdateCapella)
 		return nil, err
 	}
 
-	return &OptimisticUpdateCapella{
+	return &optimisticUpdateCapella{
 		p:              p,
 		attestedHeader: attestedHeader,
 	}, nil
 }
 
-func (u *OptimisticUpdateCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
+func (u *optimisticUpdateCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
 	return u.p.MarshalSSZTo(dst)
 }
 
-func (u *OptimisticUpdateCapella) MarshalSSZ() ([]byte, error) {
+func (u *optimisticUpdateCapella) MarshalSSZ() ([]byte, error) {
 	return u.p.MarshalSSZ()
 }
 
-func (u *OptimisticUpdateCapella) SizeSSZ() int {
+func (u *optimisticUpdateCapella) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
-func (u *OptimisticUpdateCapella) Version() int {
+func (u *optimisticUpdateCapella) Proto() proto.Message {
+	return u.p
+}
+
+func (u *optimisticUpdateCapella) Version() int {
 	return version.Capella
 }
 
-func (u *OptimisticUpdateCapella) AttestedHeader() interfaces.LightClientHeader {
+func (u *optimisticUpdateCapella) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
-func (u *OptimisticUpdateCapella) SyncAggregate() *pb.SyncAggregate {
+func (u *optimisticUpdateCapella) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
-func (u *OptimisticUpdateCapella) SignatureSlot() primitives.Slot {
+func (u *optimisticUpdateCapella) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
 
-type OptimisticUpdateDeneb struct {
+type optimisticUpdateDeneb struct {
 	p              *pb.LightClientOptimisticUpdateDeneb
 	attestedHeader interfaces.LightClientHeader
 }
 
-var _ interfaces.LightClientOptimisticUpdate = &OptimisticUpdateDeneb{}
+var _ interfaces.LightClientOptimisticUpdate = &optimisticUpdateDeneb{}
 
 func NewWrappedOptimisticUpdateDeneb(p *pb.LightClientOptimisticUpdateDeneb) (interfaces.LightClientOptimisticUpdate, error) {
 	if p == nil {
@@ -143,36 +194,40 @@ func NewWrappedOptimisticUpdateDeneb(p *pb.LightClientOptimisticUpdateDeneb) (in
 		return nil, err
 	}
 
-	return &OptimisticUpdateDeneb{
+	return &optimisticUpdateDeneb{
 		p:              p,
 		attestedHeader: attestedHeader,
 	}, nil
 }
 
-func (u *OptimisticUpdateDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
+func (u *optimisticUpdateDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
 	return u.p.MarshalSSZTo(dst)
 }
 
-func (u *OptimisticUpdateDeneb) MarshalSSZ() ([]byte, error) {
+func (u *optimisticUpdateDeneb) MarshalSSZ() ([]byte, error) {
 	return u.p.MarshalSSZ()
 }
 
-func (u *OptimisticUpdateDeneb) SizeSSZ() int {
+func (u *optimisticUpdateDeneb) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
-func (u *OptimisticUpdateDeneb) Version() int {
+func (u *optimisticUpdateDeneb) Proto() proto.Message {
+	return u.p
+}
+
+func (u *optimisticUpdateDeneb) Version() int {
 	return version.Deneb
 }
 
-func (u *OptimisticUpdateDeneb) AttestedHeader() interfaces.LightClientHeader {
+func (u *optimisticUpdateDeneb) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
-func (u *OptimisticUpdateDeneb) SyncAggregate() *pb.SyncAggregate {
+func (u *optimisticUpdateDeneb) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
-func (u *OptimisticUpdateDeneb) SignatureSlot() primitives.Slot {
+func (u *optimisticUpdateDeneb) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }

consensus-types/light-client/update.go

@@ -23,11 +23,17 @@ func NewWrappedUpdate(m proto.Message) (interfaces.LightClientUpdate, error) {
 		return NewWrappedUpdateCapella(t)
 	case *pb.LightClientUpdateDeneb:
 		return NewWrappedUpdateDeneb(t)
+	case *pb.LightClientUpdateElectra:
+		return NewWrappedUpdateElectra(t)
 	default:
 		return nil, fmt.Errorf("cannot construct light client update from type %T", t)
 	}
 }
 
+// In addition to the proto object being wrapped, we store some fields that have to be
+// constructed from the proto, so that we don't have to reconstruct them every time
+// in getters.
+
 type updateAltair struct {
 	p                       *pb.LightClientUpdateAltair
 	attestedHeader          interfaces.LightClientHeader
@@ -42,14 +48,20 @@ func NewWrappedUpdateAltair(p *pb.LightClientUpdateAltair) (interfaces.LightClie
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderAltair(p.AttestedHeader)
+
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderAltair(p.FinalizedHeader)
-	if err != nil {
-		return nil, err
+
+	var finalizedHeader interfaces.LightClientHeader
+	if p.FinalizedHeader != nil {
+		finalizedHeader, err = NewWrappedHeader(p.FinalizedHeader)
+		if err != nil {
+			return nil, err
+		}
 	}
+
 	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
 		"sync committee",
 		p.NextSyncCommitteeBranch,
@@ -88,6 +100,10 @@ func (u *updateAltair) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *updateAltair) Proto() proto.Message {
+	return u.p
+}
+
 func (u *updateAltair) Version() int {
 	return version.Altair
 }
@@ -96,14 +112,40 @@ func (u *updateAltair) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
+func (u *updateAltair) SetAttestedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderAltair)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderAltair{})
+	}
+	u.p.AttestedHeader = proto
+	u.attestedHeader = header
+	return nil
+}
+
 func (u *updateAltair) NextSyncCommittee() *pb.SyncCommittee {
 	return u.p.NextSyncCommittee
 }
 
+func (u *updateAltair) SetNextSyncCommittee(sc *pb.SyncCommittee) {
+	u.p.NextSyncCommittee = sc
+}
+
 func (u *updateAltair) NextSyncCommitteeBranch() (interfaces.LightClientSyncCommitteeBranch, error) {
 	return u.nextSyncCommitteeBranch, nil
 }
 
+func (u *updateAltair) SetNextSyncCommitteeBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientSyncCommitteeBranch]("sync committee", branch, fieldparams.SyncCommitteeBranchDepth)
+	if err != nil {
+		return err
+	}
+	u.nextSyncCommitteeBranch = b
+
+	u.p.NextSyncCommitteeBranch = branch
+
+	return nil
+}
+
 func (u *updateAltair) NextSyncCommitteeBranchElectra() (interfaces.LightClientSyncCommitteeBranchElectra, error) {
 	return [6][32]byte{}, consensustypes.ErrNotSupported("NextSyncCommitteeBranchElectra", version.Altair)
 }
@@ -112,18 +154,53 @@ func (u *updateAltair) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *updateAltair) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *updateAltair) SetFinalizedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderAltair)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderAltair{})
+	}
+	u.p.FinalizedHeader = proto
+	u.finalizedHeader = header
+	return nil
+}
+
+func (u *updateAltair) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *updateAltair) SetFinalityBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientFinalityBranch]("finality", branch, fieldparams.FinalityBranchDepth)
+	if err != nil {
+		return err
+	}
+	u.finalityBranch = b
+	u.p.FinalityBranch = branch
+	return nil
+}
+
+func (u *updateAltair) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return interfaces.LightClientFinalityBranchElectra{}, consensustypes.ErrNotSupported("FinalityBranchElectra", version.Altair)
 }
 
 func (u *updateAltair) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
+func (u *updateAltair) SetSyncAggregate(sa *pb.SyncAggregate) {
+	u.p.SyncAggregate = sa
+}
+
 func (u *updateAltair) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
 
+func (u *updateAltair) SetSignatureSlot(slot primitives.Slot) {
+	u.p.SignatureSlot = slot
+}
+
+// In addition to the proto object being wrapped, we store some fields that have to be
+// constructed from the proto, so that we don't have to reconstruct them every time
+// in getters.
 type updateCapella struct {
 	p                       *pb.LightClientUpdateCapella
 	attestedHeader          interfaces.LightClientHeader
@@ -138,14 +215,20 @@ func NewWrappedUpdateCapella(p *pb.LightClientUpdateCapella) (interfaces.LightCl
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderCapella(p.AttestedHeader)
+
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderCapella(p.FinalizedHeader)
-	if err != nil {
-		return nil, err
+
+	var finalizedHeader interfaces.LightClientHeader
+	if p.FinalizedHeader != nil {
+		finalizedHeader, err = NewWrappedHeader(p.FinalizedHeader)
+		if err != nil {
+			return nil, err
+		}
 	}
+
 	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
 		"sync committee",
 		p.NextSyncCommitteeBranch,
@@ -184,6 +267,10 @@ func (u *updateCapella) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *updateCapella) Proto() proto.Message {
+	return u.p
+}
+
 func (u *updateCapella) Version() int {
 	return version.Capella
 }
@@ -192,14 +279,40 @@ func (u *updateCapella) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
+func (u *updateCapella) SetAttestedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderCapella)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderCapella{})
+	}
+	u.p.AttestedHeader = proto
+	u.attestedHeader = header
+	return nil
+}
+
 func (u *updateCapella) NextSyncCommittee() *pb.SyncCommittee {
 	return u.p.NextSyncCommittee
 }
 
+func (u *updateCapella) SetNextSyncCommittee(sc *pb.SyncCommittee) {
+	u.p.NextSyncCommittee = sc
+}
+
 func (u *updateCapella) NextSyncCommitteeBranch() (interfaces.LightClientSyncCommitteeBranch, error) {
 	return u.nextSyncCommitteeBranch, nil
 }
 
+func (u *updateCapella) SetNextSyncCommitteeBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientSyncCommitteeBranch]("sync committee", branch, fieldparams.SyncCommitteeBranchDepth)
+	if err != nil {
+		return err
+	}
+	u.nextSyncCommitteeBranch = b
+
+	u.p.NextSyncCommitteeBranch = branch
+
+	return nil
+}
+
 func (u *updateCapella) NextSyncCommitteeBranchElectra() (interfaces.LightClientSyncCommitteeBranchElectra, error) {
 	return [6][32]byte{}, consensustypes.ErrNotSupported("NextSyncCommitteeBranchElectra", version.Capella)
 }
@@ -208,18 +321,53 @@ func (u *updateCapella) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *updateCapella) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *updateCapella) SetFinalizedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderCapella)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderCapella{})
+	}
+	u.p.FinalizedHeader = proto
+	u.finalizedHeader = header
+	return nil
+}
+
+func (u *updateCapella) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *updateCapella) SetFinalityBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientFinalityBranch]("finality", branch, fieldparams.FinalityBranchDepth)
+	if err != nil {
+		return err
+	}
+	u.finalityBranch = b
+	u.p.FinalityBranch = branch
+	return nil
+}
+
+func (u *updateCapella) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return interfaces.LightClientFinalityBranchElectra{}, consensustypes.ErrNotSupported("FinalityBranchElectra", u.Version())
 }
 
 func (u *updateCapella) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
+func (u *updateCapella) SetSyncAggregate(sa *pb.SyncAggregate) {
+	u.p.SyncAggregate = sa
+}
+
 func (u *updateCapella) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
 
+func (u *updateCapella) SetSignatureSlot(slot primitives.Slot) {
+	u.p.SignatureSlot = slot
+}
+
+// In addition to the proto object being wrapped, we store some fields that have to be
+// constructed from the proto, so that we don't have to reconstruct them every time
+// in getters.
 type updateDeneb struct {
 	p                       *pb.LightClientUpdateDeneb
 	attestedHeader          interfaces.LightClientHeader
@@ -234,14 +382,20 @@ func NewWrappedUpdateDeneb(p *pb.LightClientUpdateDeneb) (interfaces.LightClient
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderDeneb(p.AttestedHeader)
+
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderDeneb(p.FinalizedHeader)
-	if err != nil {
-		return nil, err
+
+	var finalizedHeader interfaces.LightClientHeader
+	if p.FinalizedHeader != nil {
+		finalizedHeader, err = NewWrappedHeader(p.FinalizedHeader)
+		if err != nil {
+			return nil, err
+		}
 	}
+
 	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
 		"sync committee",
 		p.NextSyncCommitteeBranch,
@@ -280,6 +434,10 @@ func (u *updateDeneb) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *updateDeneb) Proto() proto.Message {
+	return u.p
+}
+
 func (u *updateDeneb) Version() int {
 	return version.Deneb
 }
@@ -288,14 +446,40 @@ func (u *updateDeneb) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
+func (u *updateDeneb) SetAttestedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderDeneb)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderDeneb{})
+	}
+	u.p.AttestedHeader = proto
+	u.attestedHeader = header
+	return nil
+}
+
 func (u *updateDeneb) NextSyncCommittee() *pb.SyncCommittee {
 	return u.p.NextSyncCommittee
 }
 
+func (u *updateDeneb) SetNextSyncCommittee(sc *pb.SyncCommittee) {
+	u.p.NextSyncCommittee = sc
+}
+
 func (u *updateDeneb) NextSyncCommitteeBranch() (interfaces.LightClientSyncCommitteeBranch, error) {
 	return u.nextSyncCommitteeBranch, nil
 }
 
+func (u *updateDeneb) SetNextSyncCommitteeBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientSyncCommitteeBranch]("sync committee", branch, fieldparams.SyncCommitteeBranchDepth)
+	if err != nil {
+		return err
+	}
+	u.nextSyncCommitteeBranch = b
+
+	u.p.NextSyncCommitteeBranch = branch
+
+	return nil
+}
+
 func (u *updateDeneb) NextSyncCommitteeBranchElectra() (interfaces.LightClientSyncCommitteeBranchElectra, error) {
 	return [6][32]byte{}, consensustypes.ErrNotSupported("NextSyncCommitteeBranchElectra", version.Deneb)
 }
@@ -304,24 +488,59 @@ func (u *updateDeneb) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *updateDeneb) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *updateDeneb) SetFinalizedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderDeneb)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderDeneb{})
+	}
+	u.p.FinalizedHeader = proto
+	u.finalizedHeader = header
+	return nil
+}
+
+func (u *updateDeneb) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return u.finalityBranch, nil
+}
+
+func (u *updateDeneb) SetFinalityBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientFinalityBranch]("finality", branch, fieldparams.FinalityBranchDepth)
+	if err != nil {
+		return err
+	}
+	u.finalityBranch = b
+	u.p.FinalityBranch = branch
+	return nil
+}
+
+func (u *updateDeneb) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return interfaces.LightClientFinalityBranchElectra{}, consensustypes.ErrNotSupported("FinalityBranchElectra", u.Version())
 }
 
 func (u *updateDeneb) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
+func (u *updateDeneb) SetSyncAggregate(sa *pb.SyncAggregate) {
+	u.p.SyncAggregate = sa
+}
+
 func (u *updateDeneb) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
 
+func (u *updateDeneb) SetSignatureSlot(slot primitives.Slot) {
+	u.p.SignatureSlot = slot
+}
+
+// In addition to the proto object being wrapped, we store some fields that have to be
+// constructed from the proto, so that we don't have to reconstruct them every time
+// in getters.
 type updateElectra struct {
 	p                       *pb.LightClientUpdateElectra
 	attestedHeader          interfaces.LightClientHeader
 	nextSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranchElectra
 	finalizedHeader         interfaces.LightClientHeader
-	finalityBranch          interfaces.LightClientFinalityBranch
+	finalityBranch          interfaces.LightClientFinalityBranchElectra
 }
 
 var _ interfaces.LightClientUpdate = &updateElectra{}
@@ -330,14 +549,20 @@ func NewWrappedUpdateElectra(p *pb.LightClientUpdateElectra) (interfaces.LightCl
 	if p == nil {
 		return nil, consensustypes.ErrNilObjectWrapped
 	}
-	attestedHeader, err := NewWrappedHeaderDeneb(p.AttestedHeader)
+
+	attestedHeader, err := NewWrappedHeader(p.AttestedHeader)
 	if err != nil {
 		return nil, err
 	}
-	finalizedHeader, err := NewWrappedHeaderDeneb(p.FinalizedHeader)
-	if err != nil {
-		return nil, err
+
+	var finalizedHeader interfaces.LightClientHeader
+	if p.FinalizedHeader != nil {
+		finalizedHeader, err = NewWrappedHeader(p.FinalizedHeader)
+		if err != nil {
+			return nil, err
+		}
 	}
+
 	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranchElectra](
 		"sync committee",
 		p.NextSyncCommitteeBranch,
@@ -346,10 +571,11 @@ func NewWrappedUpdateElectra(p *pb.LightClientUpdateElectra) (interfaces.LightCl
 	if err != nil {
 		return nil, err
 	}
-	finalityBranch, err := createBranch[interfaces.LightClientFinalityBranch](
+
+	finalityBranch, err := createBranch[interfaces.LightClientFinalityBranchElectra](
 		"finality",
 		p.FinalityBranch,
-		fieldparams.FinalityBranchDepth,
+		fieldparams.FinalityBranchDepthElectra,
 	)
 	if err != nil {
 		return nil, err
@@ -376,6 +602,10 @@ func (u *updateElectra) SizeSSZ() int {
 	return u.p.SizeSSZ()
 }
 
+func (u *updateElectra) Proto() proto.Message {
+	return u.p
+}
+
 func (u *updateElectra) Version() int {
 	return version.Electra
 }
@@ -384,14 +614,40 @@ func (u *updateElectra) AttestedHeader() interfaces.LightClientHeader {
 	return u.attestedHeader
 }
 
+func (u *updateElectra) SetAttestedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderDeneb)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderDeneb{})
+	}
+	u.p.AttestedHeader = proto
+	u.attestedHeader = header
+	return nil
+}
+
 func (u *updateElectra) NextSyncCommittee() *pb.SyncCommittee {
 	return u.p.NextSyncCommittee
 }
 
+func (u *updateElectra) SetNextSyncCommittee(sc *pb.SyncCommittee) {
+	u.p.NextSyncCommittee = sc
+}
+
 func (u *updateElectra) NextSyncCommitteeBranch() (interfaces.LightClientSyncCommitteeBranch, error) {
 	return [5][32]byte{}, consensustypes.ErrNotSupported("NextSyncCommitteeBranch", version.Electra)
 }
 
+func (u *updateElectra) SetNextSyncCommitteeBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientSyncCommitteeBranchElectra]("sync committee", branch, fieldparams.SyncCommitteeBranchDepthElectra)
+	if err != nil {
+		return err
+	}
+	u.nextSyncCommitteeBranch = b
+
+	u.p.NextSyncCommitteeBranch = branch
+
+	return nil
+}
+
 func (u *updateElectra) NextSyncCommitteeBranchElectra() (interfaces.LightClientSyncCommitteeBranchElectra, error) {
 	return u.nextSyncCommitteeBranch, nil
 }
@@ -400,14 +656,46 @@ func (u *updateElectra) FinalizedHeader() interfaces.LightClientHeader {
 	return u.finalizedHeader
 }
 
-func (u *updateElectra) FinalityBranch() interfaces.LightClientFinalityBranch {
-	return u.finalityBranch
+func (u *updateElectra) SetFinalizedHeader(header interfaces.LightClientHeader) error {
+	proto, ok := header.Proto().(*pb.LightClientHeaderDeneb)
+	if !ok {
+		return fmt.Errorf("header type %T is not %T", proto, &pb.LightClientHeaderDeneb{})
+	}
+	u.p.FinalizedHeader = proto
+	u.finalizedHeader = header
+	return nil
+}
+
+func (u *updateElectra) FinalityBranch() (interfaces.LightClientFinalityBranch, error) {
+	return interfaces.LightClientFinalityBranch{}, consensustypes.ErrNotSupported("FinalityBranch", u.Version())
+}
+
+func (u *updateElectra) SetFinalityBranch(branch [][]byte) error {
+	b, err := createBranch[interfaces.LightClientFinalityBranchElectra]("finality", branch, fieldparams.FinalityBranchDepthElectra)
+	if err != nil {
+		return err
+	}
+	u.finalityBranch = b
+	u.p.FinalityBranch = branch
+	return nil
+}
+
+func (u *updateElectra) FinalityBranchElectra() (interfaces.LightClientFinalityBranchElectra, error) {
+	return u.finalityBranch, nil
 }
 
 func (u *updateElectra) SyncAggregate() *pb.SyncAggregate {
 	return u.p.SyncAggregate
 }
 
+func (u *updateElectra) SetSyncAggregate(sa *pb.SyncAggregate) {
+	u.p.SyncAggregate = sa
+}
+
 func (u *updateElectra) SignatureSlot() primitives.Slot {
 	return u.p.SignatureSlot
 }
+
+func (u *updateElectra) SetSignatureSlot(slot primitives.Slot) {
+	u.p.SignatureSlot = slot
+}

consensus-types/payload-attribute/BUILD.bazel

@@ -10,8 +10,12 @@ go_library(
     importpath = "github.com/prysmaticlabs/prysm/v5/consensus-types/payload-attribute",
     visibility = ["//visibility:public"],
     deps = [
+        "//beacon-chain/state:go_default_library",
+        "//config/fieldparams:go_default_library",
         "//consensus-types:go_default_library",
         "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
+        "//consensus-types/primitives:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//runtime/version:go_default_library",
         "@com_github_pkg_errors//:go_default_library",

consensus-types/payload-attribute/getters.go

@@ -38,6 +38,16 @@ func (a *data) Withdrawals() ([]*enginev1.Withdrawal, error) {
 	return a.withdrawals, nil
 }
 
+func (a *data) ParentBeaconBlockRoot() ([]byte, error) {
+	if len(a.parentBeaconBlockRoot) == 0 {
+		return nil, errNoParentRoot
+	}
+	if a.version < version.Deneb {
+		return nil, consensus_types.ErrNotSupported("ParentBeaconBlockRoot", a.version)
+	}
+	return a.parentBeaconBlockRoot, nil
+}
+
 // PbV1 returns the payload attribute in version 1.
 func (a *data) PbV1() (*enginev1.PayloadAttributes, error) {
 	if a == nil {
@@ -97,6 +107,9 @@ func (a *data) PbV3() (*enginev1.PayloadAttributesV3, error) {
 
 // IsEmpty returns whether the given payload attribute is empty
 func (a *data) IsEmpty() bool {
+	if a == nil {
+		return true
+	}
 	if len(a.PrevRandao()) != 0 {
 		return false
 	}

consensus-types/payload-attribute/interface.go

@@ -10,6 +10,7 @@ type Attributer interface {
 	Timestamp() uint64
 	SuggestedFeeRecipient() []byte
 	Withdrawals() ([]*enginev1.Withdrawal, error)
+	ParentBeaconBlockRoot() ([]byte, error)
 	PbV1() (*enginev1.PayloadAttributes, error)
 	PbV2() (*enginev1.PayloadAttributesV2, error)
 	PbV3() (*enginev1.PayloadAttributesV3, error)

consensus-types/payload-attribute/types.go

@@ -2,7 +2,11 @@ package payloadattribute
 
 import (
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
+	field_params "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	enginev1 "github.com/prysmaticlabs/prysm/v5/proto/engine/v1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )
@@ -23,6 +27,7 @@ type data struct {
 var (
 	errNilPayloadAttribute         = errors.New("received nil payload attribute")
 	errUnsupportedPayloadAttribute = errors.New("unsupported payload attribute")
+	errNoParentRoot                = errors.New("parent root is empty")
 )
 
 // New returns a new payload attribute with the given input object.
@@ -89,3 +94,16 @@ func initPayloadAttributeFromV3(a *enginev1.PayloadAttributesV3) (Attributer, er
 		parentBeaconBlockRoot: a.ParentBeaconBlockRoot,
 	}, nil
 }
+
+// EventData holds the values for a PayloadAttributes event.
+type EventData struct {
+	ProposerIndex     primitives.ValidatorIndex
+	ProposalSlot      primitives.Slot
+	ParentBlockNumber uint64
+	ParentBlockRoot   []byte
+	ParentBlockHash   []byte
+	Attributer        Attributer
+	HeadState         state.BeaconState
+	HeadBlock         interfaces.ReadOnlySignedBeaconBlock
+	HeadRoot          [field_params.RootLength]byte
+}

deps.bzl

@@ -582,6 +582,12 @@ def prysm_deps():
         sum = "h1:oWf5W7GtOLgp6bciQYDmhHHjdhYkALu6S/5Ni9ZgSvQ=",
         version = "v1.5.5",
     )
+    go_repository(
+        name = "com_github_dave_jennifer",
+        importpath = "github.com/dave/jennifer",
+        sum = "h1:MQ/6emI2xM7wt0tJzJzyUik2Q3Tcn2eE0vtYgh4GPVI=",
+        version = "v1.6.0",
+    )
     go_repository(
         name = "com_github_davecgh_go_spew",
         importpath = "github.com/davecgh/go-spew",

encoding/bytesutil/bytes.go

@@ -3,6 +3,7 @@ package bytesutil
 
 import (
 	"fmt"
+	"unsafe"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
 )
@@ -145,3 +146,10 @@ func ReverseByteOrder(input []byte) []byte {
 	}
 	return b
 }
+
+// UnsafeCastToString casts a byte slice to a string object without performing a copy. Changes
+// to byteSlice will also modify the contents of the string, so it is the caller's responsibility
+// to ensure that the byte slice will not modified after the string is created.
+func UnsafeCastToString(byteSlice []byte) string {
+	return *(*string)(unsafe.Pointer(&byteSlice)) // #nosec G103
+}

encoding/bytesutil/bytes_test.go

@@ -217,6 +217,50 @@ func TestToBytes20(t *testing.T) {
 	}
 }
 
+func TestCastToString(t *testing.T) {
+	bSlice := []byte{'a', 'b', 'c'}
+	bString := bytesutil.UnsafeCastToString(bSlice)
+
+	originalString := "abc"
+
+	// Mutate original slice to make sure that a copy was not performed.
+	bSlice[0] = 'd'
+	assert.NotEqual(t, originalString, bString)
+	assert.Equal(t, "dbc", bString)
+}
+
+func BenchmarkUnsafeCastToString(b *testing.B) {
+	data := []byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}
+	empty := []byte{}
+	var nilData []byte
+
+	b.Run("string(b)", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			_ = string(data)
+			_ = string(empty)
+			_ = string(nilData)
+		}
+	})
+
+	b.Run("bytesutil.UnsafeCastToString(b)", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			_ = bytesutil.UnsafeCastToString(data)
+			_ = bytesutil.UnsafeCastToString(empty)
+			_ = bytesutil.UnsafeCastToString(nilData)
+		}
+	})
+}
+
+func FuzzUnsafeCastToString(f *testing.F) {
+	f.Fuzz(func(t *testing.T, input []byte) {
+		want := string(input)
+		result := bytesutil.UnsafeCastToString(input)
+		if result != want {
+			t.Fatalf("input (%v) result (%s) did not match expected (%s)", input, result, want)
+		}
+	})
+}
+
 func BenchmarkToBytes32(b *testing.B) {
 	x := []byte{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}
 	for i := 0; i < b.N; i++ {

encoding/ssz/htrutils.go

@@ -141,7 +141,7 @@ func WithdrawalSliceRoot(withdrawals []*enginev1.Withdrawal, limit uint64) ([32]
 	return MixInLength(bytesRoot, bytesRootBufRoot), nil
 }
 
-// DepositRequestsSliceRoot computes the HTR of a slice of deposit receipts.
+// DepositRequestsSliceRoot computes the HTR of a slice of deposit requests.
 // The limit parameter is used as input to the bitwise merkleization algorithm.
 func DepositRequestsSliceRoot(depositRequests []*enginev1.DepositRequest, limit uint64) ([32]byte, error) {
 	return SliceRoot(depositRequests, limit)

proto/prysm/v1alpha1/BUILD.bazel

@@ -81,11 +81,11 @@ ssz_altair_objs = [
     "BeaconBlockBodyAltair",
     "BeaconStateAltair",
     "ContributionAndProof",
-    "LightClientBootstrapAltair",
-    "LightClientFinalityUpdateAltair",
     "LightClientHeaderAltair",
-    "LightClientOptimisticUpdateAltair",
+    "LightClientBootstrapAltair",
     "LightClientUpdateAltair",
+    "LightClientFinalityUpdateAltair",
+    "LightClientOptimisticUpdateAltair",
     "SignedBeaconBlockAltair",
     "SignedContributionAndProof",
     "SyncAggregate",
@@ -115,11 +115,11 @@ ssz_capella_objs = [
     "BlindedBeaconBlockCapella",
     "BuilderBidCapella",
     "HistoricalSummary",
-    "LightClientBootstrapCapella",
-    "LightClientFinalityUpdateCapella",
     "LightClientHeaderCapella",
-    "LightClientOptimisticUpdateCapella",
+    "LightClientBootstrapCapella",
     "LightClientUpdateCapella",
+    "LightClientFinalityUpdateCapella",
+    "LightClientOptimisticUpdateCapella",
     "SignedBLSToExecutionChange",
     "SignedBeaconBlockCapella",
     "SignedBlindedBeaconBlockCapella",
@@ -137,11 +137,11 @@ ssz_deneb_objs = [
     "BlobSidecar",
     "BlobSidecars",
     "BuilderBidDeneb",
-    "LightClientBootstrapDeneb",
-    "LightClientFinalityUpdateDeneb",
     "LightClientHeaderDeneb",
-    "LightClientOptimisticUpdateDeneb",
+    "LightClientBootstrapDeneb",
     "LightClientUpdateDeneb",
+    "LightClientFinalityUpdateDeneb",
+    "LightClientOptimisticUpdateDeneb",
     "SignedBeaconBlockContentsDeneb",
     "SignedBeaconBlockDeneb",
     "SignedBlindedBeaconBlockDeneb",
@@ -151,16 +151,18 @@ ssz_electra_objs = [
     "AggregateAttestationAndProofElectra",
     "AttestationElectra",
     "AttesterSlashingElectra",
+    "BeaconBlockElectra",
     "BeaconBlockBodyElectra",
     "BeaconBlockContentsElectra",
-    "BeaconBlockElectra",
     "BeaconStateElectra",
     "BlindedBeaconBlockBodyElectra",
     "BlindedBeaconBlockElectra",
     "Consolidation",
     "IndexedAttestationElectra",
+    "LightClientHeaderElectra",
     "LightClientBootstrapElectra",
     "LightClientUpdateElectra",
+    "LightClientFinalityUpdateElectra",
     "PendingDeposit",
     "PendingDeposits",
     "PendingConsolidation",
@@ -172,6 +174,11 @@ ssz_electra_objs = [
     "SignedConsolidation",
 ]
 
+ssz_fulu_objs = [
+    "DataColumnIdentifier",
+    "DataColumnSidecar",
+]
+
 ssz_gen_marshal(
     name = "ssz_generated_phase0",
     out = "phase0.ssz.go",
@@ -249,6 +256,19 @@ ssz_gen_marshal(
     objs = ssz_electra_objs,
 )
 
+ssz_gen_marshal(
+    name = "ssz_generated_fulu",
+    out = "fulu.ssz.go",
+    exclude_objs = ssz_phase0_objs + ssz_altair_objs + ssz_bellatrix_objs + ssz_capella_objs + ssz_deneb_objs + ssz_electra_objs,
+    go_proto = ":go_proto",
+    includes = [
+        "//consensus-types/primitives:go_default_library",
+        "//math:go_default_library",
+        "//proto/engine/v1:go_default_library",
+    ],
+    objs = ssz_fulu_objs,
+)
+
 ssz_gen_marshal(
     name = "ssz_generated_non_core",
     out = "non-core.ssz.go",
@@ -261,8 +281,10 @@ ssz_gen_marshal(
     objs = [
         "BeaconBlocksByRangeRequest",
         "BlobSidecarsByRangeRequest",
+        "DataColumnSidecarsByRangeRequest",
         "MetaDataV0",
         "MetaDataV1",
+        "MetaDataV2",
         "SignedValidatorRegistrationV1",
         "ValidatorRegistrationV1",
         "BuilderBid",
@@ -311,6 +333,7 @@ go_library(
         ":ssz_generated_capella",  # keep
         ":ssz_generated_deneb",  # keep
         ":ssz_generated_electra",  # keep
+        ":ssz_generated_fulu",  # keep
         ":ssz_generated_non_core",  # keep
         ":ssz_generated_phase0",  # keep
     ],
@@ -352,6 +375,7 @@ ssz_proto_files(
         "beacon_state.proto",
         "blobs.proto",
         "light_client.proto",
+        "data_columns.proto",
         "sync_committee.proto",
         "withdrawals.proto",
     ],

proto/prysm/v1alpha1/attestation.go

@@ -25,6 +25,7 @@ type Att interface {
 	CommitteeBitsVal() bitfield.Bitfield
 	GetSignature() []byte
 	GetCommitteeIndex() (primitives.CommitteeIndex, error)
+	IsNil() bool
 }
 
 // IndexedAtt defines common functionality for all indexed attestation types.
@@ -37,6 +38,7 @@ type IndexedAtt interface {
 	GetAttestingIndices() []uint64
 	GetData() *AttestationData
 	GetSignature() []byte
+	IsNil() bool
 }
 
 // SignedAggregateAttAndProof defines common functionality for all signed aggregate attestation types.
@@ -48,6 +50,7 @@ type SignedAggregateAttAndProof interface {
 	Version() int
 	AggregateAttestationAndProof() AggregateAttAndProof
 	GetSignature() []byte
+	IsNil() bool
 }
 
 // AggregateAttAndProof defines common functionality for all aggregate attestation types.
@@ -60,6 +63,7 @@ type AggregateAttAndProof interface {
 	GetAggregatorIndex() primitives.ValidatorIndex
 	AggregateVal() Att
 	GetSelectionProof() []byte
+	IsNil() bool
 }
 
 // AttSlashing defines common functionality for all attestation slashing types.
@@ -71,6 +75,7 @@ type AttSlashing interface {
 	Version() int
 	FirstAttestation() IndexedAtt
 	SecondAttestation() IndexedAtt
+	IsNil() bool
 }
 
 // Copy --
@@ -103,20 +108,25 @@ func (a *Attestation) Version() int {
 	return version.Phase0
 }
 
+// IsNil --
+func (a *Attestation) IsNil() bool {
+	return a == nil || a.Data == nil
+}
+
 // Clone --
 func (a *Attestation) Clone() Att {
 	return a.Copy()
 }
 
 // Copy --
-func (att *Attestation) Copy() *Attestation {
-	if att == nil {
+func (a *Attestation) Copy() *Attestation {
+	if a == nil {
 		return nil
 	}
 	return &Attestation{
-		AggregationBits: bytesutil.SafeCopyBytes(att.AggregationBits),
-		Data:            att.Data.Copy(),
-		Signature:       bytesutil.SafeCopyBytes(att.Signature),
+		AggregationBits: bytesutil.SafeCopyBytes(a.AggregationBits),
+		Data:            a.Data.Copy(),
+		Signature:       bytesutil.SafeCopyBytes(a.Signature),
 	}
 }
 
@@ -140,6 +150,11 @@ func (a *PendingAttestation) Version() int {
 	return version.Phase0
 }
 
+// IsNil --
+func (a *PendingAttestation) IsNil() bool {
+	return a == nil || a.Data == nil
+}
+
 // Clone --
 func (a *PendingAttestation) Clone() Att {
 	return a.Copy()
@@ -181,21 +196,26 @@ func (a *AttestationElectra) Version() int {
 	return version.Electra
 }
 
+// IsNil --
+func (a *AttestationElectra) IsNil() bool {
+	return a == nil || a.Data == nil
+}
+
 // Clone --
 func (a *AttestationElectra) Clone() Att {
 	return a.Copy()
 }
 
 // Copy --
-func (att *AttestationElectra) Copy() *AttestationElectra {
-	if att == nil {
+func (a *AttestationElectra) Copy() *AttestationElectra {
+	if a == nil {
 		return nil
 	}
 	return &AttestationElectra{
-		AggregationBits: bytesutil.SafeCopyBytes(att.AggregationBits),
-		CommitteeBits:   bytesutil.SafeCopyBytes(att.CommitteeBits),
-		Data:            att.Data.Copy(),
-		Signature:       bytesutil.SafeCopyBytes(att.Signature),
+		AggregationBits: bytesutil.SafeCopyBytes(a.AggregationBits),
+		CommitteeBits:   bytesutil.SafeCopyBytes(a.CommitteeBits),
+		Data:            a.Data.Copy(),
+		Signature:       bytesutil.SafeCopyBytes(a.Signature),
 	}
 }
 
@@ -227,40 +247,50 @@ func (a *IndexedAttestation) Version() int {
 	return version.Phase0
 }
 
+// IsNil --
+func (a *IndexedAttestation) IsNil() bool {
+	return a == nil || a.Data == nil
+}
+
 // Version --
 func (a *IndexedAttestationElectra) Version() int {
 	return version.Electra
 }
 
+// IsNil --
+func (a *IndexedAttestationElectra) IsNil() bool {
+	return a == nil || a.Data == nil
+}
+
 // Copy --
-func (indexedAtt *IndexedAttestation) Copy() *IndexedAttestation {
+func (a *IndexedAttestation) Copy() *IndexedAttestation {
 	var indices []uint64
-	if indexedAtt == nil {
+	if a == nil {
 		return nil
-	} else if indexedAtt.AttestingIndices != nil {
-		indices = make([]uint64, len(indexedAtt.AttestingIndices))
-		copy(indices, indexedAtt.AttestingIndices)
+	} else if a.AttestingIndices != nil {
+		indices = make([]uint64, len(a.AttestingIndices))
+		copy(indices, a.AttestingIndices)
 	}
 	return &IndexedAttestation{
 		AttestingIndices: indices,
-		Data:             indexedAtt.Data.Copy(),
-		Signature:        bytesutil.SafeCopyBytes(indexedAtt.Signature),
+		Data:             a.Data.Copy(),
+		Signature:        bytesutil.SafeCopyBytes(a.Signature),
 	}
 }
 
 // Copy --
-func (indexedAtt *IndexedAttestationElectra) Copy() *IndexedAttestationElectra {
+func (a *IndexedAttestationElectra) Copy() *IndexedAttestationElectra {
 	var indices []uint64
-	if indexedAtt == nil {
+	if a == nil {
 		return nil
-	} else if indexedAtt.AttestingIndices != nil {
-		indices = make([]uint64, len(indexedAtt.AttestingIndices))
-		copy(indices, indexedAtt.AttestingIndices)
+	} else if a.AttestingIndices != nil {
+		indices = make([]uint64, len(a.AttestingIndices))
+		copy(indices, a.AttestingIndices)
 	}
 	return &IndexedAttestationElectra{
 		AttestingIndices: indices,
-		Data:             indexedAtt.Data.Copy(),
-		Signature:        bytesutil.SafeCopyBytes(indexedAtt.Signature),
+		Data:             a.Data.Copy(),
+		Signature:        bytesutil.SafeCopyBytes(a.Signature),
 	}
 }
 
@@ -269,6 +299,13 @@ func (a *AttesterSlashing) Version() int {
 	return version.Phase0
 }
 
+// IsNil --
+func (a *AttesterSlashing) IsNil() bool {
+	return a == nil ||
+		a.Attestation_1 == nil || a.Attestation_1.IsNil() ||
+		a.Attestation_2 == nil || a.Attestation_2.IsNil()
+}
+
 // FirstAttestation --
 func (a *AttesterSlashing) FirstAttestation() IndexedAtt {
 	return a.Attestation_1
@@ -284,6 +321,13 @@ func (a *AttesterSlashingElectra) Version() int {
 	return version.Electra
 }
 
+// IsNil --
+func (a *AttesterSlashingElectra) IsNil() bool {
+	return a == nil ||
+		a.Attestation_1 == nil || a.Attestation_1.IsNil() ||
+		a.Attestation_2 == nil || a.Attestation_2.IsNil()
+}
+
 // FirstAttestation --
 func (a *AttesterSlashingElectra) FirstAttestation() IndexedAtt {
 	return a.Attestation_1
@@ -320,6 +364,11 @@ func (a *AggregateAttestationAndProof) Version() int {
 	return version.Phase0
 }
 
+// IsNil --
+func (a *AggregateAttestationAndProof) IsNil() bool {
+	return a == nil || a.Aggregate == nil || a.Aggregate.IsNil()
+}
+
 // AggregateVal --
 func (a *AggregateAttestationAndProof) AggregateVal() Att {
 	return a.Aggregate
@@ -330,6 +379,11 @@ func (a *AggregateAttestationAndProofElectra) Version() int {
 	return version.Electra
 }
 
+// IsNil --
+func (a *AggregateAttestationAndProofElectra) IsNil() bool {
+	return a == nil || a.Aggregate == nil || a.Aggregate.IsNil()
+}
+
 // AggregateVal --
 func (a *AggregateAttestationAndProofElectra) AggregateVal() Att {
 	return a.Aggregate
@@ -340,6 +394,11 @@ func (a *SignedAggregateAttestationAndProof) Version() int {
 	return version.Phase0
 }
 
+// IsNil --
+func (a *SignedAggregateAttestationAndProof) IsNil() bool {
+	return a == nil || a.Message == nil || a.Message.IsNil()
+}
+
 // AggregateAttestationAndProof --
 func (a *SignedAggregateAttestationAndProof) AggregateAttestationAndProof() AggregateAttAndProof {
 	return a.Message
@@ -350,6 +409,11 @@ func (a *SignedAggregateAttestationAndProofElectra) Version() int {
 	return version.Electra
 }
 
+// IsNil --
+func (a *SignedAggregateAttestationAndProofElectra) IsNil() bool {
+	return a == nil || a.Message == nil || a.Message.IsNil()
+}
+
 // AggregateAttestationAndProof --
 func (a *SignedAggregateAttestationAndProofElectra) AggregateAttestationAndProof() AggregateAttAndProof {
 	return a.Message

proto/prysm/v1alpha1/attestation/attestation_utils.go

@@ -39,7 +39,7 @@ import (
 //	     data=attestation.data,
 //	     signature=attestation.signature,
 //	 )
-func ConvertToIndexed(ctx context.Context, attestation ethpb.Att, committees ...[]primitives.ValidatorIndex) (ethpb.IndexedAtt, error) {
+func ConvertToIndexed(_ context.Context, attestation ethpb.Att, committees ...[]primitives.ValidatorIndex) (ethpb.IndexedAtt, error) {
 	attIndices, err := AttestingIndices(attestation, committees...)
 	if err != nil {
 		return nil, err
@@ -185,12 +185,10 @@ func IsValidAttestationIndices(ctx context.Context, indexedAttestation ethpb.Ind
 	_, span := trace.StartSpan(ctx, "attestationutil.IsValidAttestationIndices")
 	defer span.End()
 
-	if indexedAttestation == nil ||
-		indexedAttestation.GetData() == nil ||
-		indexedAttestation.GetData().Target == nil ||
-		indexedAttestation.GetAttestingIndices() == nil {
+	if indexedAttestation == nil || indexedAttestation.IsNil() || indexedAttestation.GetData().Target == nil || indexedAttestation.GetData().Source == nil {
 		return errors.New("nil or missing indexed attestation data")
 	}
+
 	indices := indexedAttestation.GetAttestingIndices()
 	if len(indices) == 0 {
 		return errors.New("expected non-empty attesting indices")

proto/prysm/v1alpha1/attestation/attestation_utils_test.go

@@ -106,10 +106,11 @@ func TestIsValidAttestationIndices(t *testing.T) {
 			att: &eth.IndexedAttestation{
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
-			wantedErr: "nil or missing indexed attestation data",
+			wantedErr: "expected non-empty attesting indices",
 		},
 		{
 			name: "Indices should be non-empty",
@@ -117,6 +118,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: []uint64{},
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -128,6 +130,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: make([]uint64, params.BeaconConfig().MaxValidatorsPerCommittee+1),
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -139,6 +142,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: []uint64{3, 2, 1},
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -150,6 +154,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: []uint64{1, 2, 3},
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -160,6 +165,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: []uint64{1, 2},
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -170,6 +176,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: []uint64{1},
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -180,6 +187,7 @@ func TestIsValidAttestationIndices(t *testing.T) {
 				AttestingIndices: make([]uint64, params.BeaconConfig().MaxValidatorsPerCommittee*params.BeaconConfig().MaxCommitteesPerSlot+1),
 				Data: &eth.AttestationData{
 					Target: &eth.Checkpoint{},
+					Source: &eth.Checkpoint{},
 				},
 				Signature: make([]byte, fieldparams.BLSSignatureLength),
 			},
@@ -218,6 +226,7 @@ func BenchmarkIsValidAttestationIndices(b *testing.B) {
 		AttestingIndices: indices,
 		Data: &eth.AttestationData{
 			Target: &eth.Checkpoint{},
+			Source: &eth.Checkpoint{},
 		},
 		Signature: make([]byte, fieldparams.BLSSignatureLength),
 	}

proto/prysm/v1alpha1/data_columns.pb.go

@@ -0,0 +1,299 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.31.0
+// 	protoc        v4.25.1
+// source: proto/prysm/v1alpha1/data_columns.proto
+
+package eth
+
+import (
+	reflect "reflect"
+	sync "sync"
+
+	_ "github.com/prysmaticlabs/prysm/v5/proto/eth/ext"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type DataColumnSidecar struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ColumnIndex                  uint64                   `protobuf:"varint,1,opt,name=column_index,json=columnIndex,proto3" json:"column_index,omitempty"`
+	DataColumn                   [][]byte                 `protobuf:"bytes,2,rep,name=data_column,json=dataColumn,proto3" json:"data_column,omitempty" ssz-max:"4096" ssz-size:"?,2048"`
+	KzgCommitments               [][]byte                 `protobuf:"bytes,3,rep,name=kzg_commitments,json=kzgCommitments,proto3" json:"kzg_commitments,omitempty" ssz-max:"4096" ssz-size:"?,48"`
+	KzgProof                     [][]byte                 `protobuf:"bytes,4,rep,name=kzg_proof,json=kzgProof,proto3" json:"kzg_proof,omitempty" ssz-max:"4096" ssz-size:"?,48"`
+	SignedBlockHeader            *SignedBeaconBlockHeader `protobuf:"bytes,5,opt,name=signed_block_header,json=signedBlockHeader,proto3" json:"signed_block_header,omitempty"`
+	KzgCommitmentsInclusionProof [][]byte                 `protobuf:"bytes,6,rep,name=kzg_commitments_inclusion_proof,json=kzgCommitmentsInclusionProof,proto3" json:"kzg_commitments_inclusion_proof,omitempty" ssz-size:"4,32"`
+}
+
+func (x *DataColumnSidecar) Reset() {
+	*x = DataColumnSidecar{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DataColumnSidecar) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DataColumnSidecar) ProtoMessage() {}
+
+func (x *DataColumnSidecar) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DataColumnSidecar.ProtoReflect.Descriptor instead.
+func (*DataColumnSidecar) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_data_columns_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *DataColumnSidecar) GetColumnIndex() uint64 {
+	if x != nil {
+		return x.ColumnIndex
+	}
+	return 0
+}
+
+func (x *DataColumnSidecar) GetDataColumn() [][]byte {
+	if x != nil {
+		return x.DataColumn
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetKzgCommitments() [][]byte {
+	if x != nil {
+		return x.KzgCommitments
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetKzgProof() [][]byte {
+	if x != nil {
+		return x.KzgProof
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetSignedBlockHeader() *SignedBeaconBlockHeader {
+	if x != nil {
+		return x.SignedBlockHeader
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetKzgCommitmentsInclusionProof() [][]byte {
+	if x != nil {
+		return x.KzgCommitmentsInclusionProof
+	}
+	return nil
+}
+
+type DataColumnIdentifier struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	BlockRoot   []byte `protobuf:"bytes,1,opt,name=block_root,json=blockRoot,proto3" json:"block_root,omitempty" ssz-size:"32"`
+	ColumnIndex uint64 `protobuf:"varint,2,opt,name=column_index,json=columnIndex,proto3" json:"column_index,omitempty"`
+}
+
+func (x *DataColumnIdentifier) Reset() {
+	*x = DataColumnIdentifier{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DataColumnIdentifier) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DataColumnIdentifier) ProtoMessage() {}
+
+func (x *DataColumnIdentifier) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DataColumnIdentifier.ProtoReflect.Descriptor instead.
+func (*DataColumnIdentifier) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_data_columns_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *DataColumnIdentifier) GetBlockRoot() []byte {
+	if x != nil {
+		return x.BlockRoot
+	}
+	return nil
+}
+
+func (x *DataColumnIdentifier) GetColumnIndex() uint64 {
+	if x != nil {
+		return x.ColumnIndex
+	}
+	return 0
+}
+
+var File_proto_prysm_v1alpha1_data_columns_proto protoreflect.FileDescriptor
+
+var file_proto_prysm_v1alpha1_data_columns_proto_rawDesc = []byte{
+	0x0a, 0x27, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x70, 0x72, 0x79, 0x73, 0x6d, 0x2f, 0x76, 0x31,
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+	0x20, 0x01, 0x28, 0x04, 0x52, 0x0b, 0x63, 0x6f, 0x6c, 0x75, 0x6d, 0x6e, 0x49, 0x6e, 0x64, 0x65,
+	0x78, 0x42, 0x9b, 0x01, 0x0a, 0x19, 0x6f, 0x72, 0x67, 0x2e, 0x65, 0x74, 0x68, 0x65, 0x72, 0x65,
+	0x75, 0x6d, 0x2e, 0x65, 0x74, 0x68, 0x2e, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x42,
+	0x10, 0x44, 0x61, 0x74, 0x61, 0x43, 0x6f, 0x6c, 0x75, 0x6d, 0x6e, 0x73, 0x50, 0x72, 0x6f, 0x74,
+	0x6f, 0x50, 0x01, 0x5a, 0x3a, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
+	0x70, 0x72, 0x79, 0x73, 0x6d, 0x61, 0x74, 0x69, 0x63, 0x6c, 0x61, 0x62, 0x73, 0x2f, 0x70, 0x72,
+	0x79, 0x73, 0x6d, 0x2f, 0x76, 0x35, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x70, 0x72, 0x79,
+	0x73, 0x6d, 0x2f, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x3b, 0x65, 0x74, 0x68, 0xaa,
+	0x02, 0x15, 0x45, 0x74, 0x68, 0x65, 0x72, 0x65, 0x75, 0x6d, 0x2e, 0x45, 0x74, 0x68, 0x2e, 0x76,
+	0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0xca, 0x02, 0x15, 0x45, 0x74, 0x68, 0x65, 0x72, 0x65,
+	0x75, 0x6d, 0x5c, 0x45, 0x74, 0x68, 0x5c, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDescOnce sync.Once
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDescData = file_proto_prysm_v1alpha1_data_columns_proto_rawDesc
+)
+
+func file_proto_prysm_v1alpha1_data_columns_proto_rawDescGZIP() []byte {
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDescOnce.Do(func() {
+		file_proto_prysm_v1alpha1_data_columns_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_prysm_v1alpha1_data_columns_proto_rawDescData)
+	})
+	return file_proto_prysm_v1alpha1_data_columns_proto_rawDescData
+}
+
+var file_proto_prysm_v1alpha1_data_columns_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_proto_prysm_v1alpha1_data_columns_proto_goTypes = []interface{}{
+	(*DataColumnSidecar)(nil),       // 0: ethereum.eth.v1alpha1.DataColumnSidecar
+	(*DataColumnIdentifier)(nil),    // 1: ethereum.eth.v1alpha1.DataColumnIdentifier
+	(*SignedBeaconBlockHeader)(nil), // 2: ethereum.eth.v1alpha1.SignedBeaconBlockHeader
+}
+var file_proto_prysm_v1alpha1_data_columns_proto_depIdxs = []int32{
+	2, // 0: ethereum.eth.v1alpha1.DataColumnSidecar.signed_block_header:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlockHeader
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_proto_prysm_v1alpha1_data_columns_proto_init() }
+func file_proto_prysm_v1alpha1_data_columns_proto_init() {
+	if File_proto_prysm_v1alpha1_data_columns_proto != nil {
+		return
+	}
+	file_proto_prysm_v1alpha1_beacon_block_proto_init()
+	if !protoimpl.UnsafeEnabled {
+		file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DataColumnSidecar); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DataColumnIdentifier); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proto_prysm_v1alpha1_data_columns_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_proto_prysm_v1alpha1_data_columns_proto_goTypes,
+		DependencyIndexes: file_proto_prysm_v1alpha1_data_columns_proto_depIdxs,
+		MessageInfos:      file_proto_prysm_v1alpha1_data_columns_proto_msgTypes,
+	}.Build()
+	File_proto_prysm_v1alpha1_data_columns_proto = out.File
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDesc = nil
+	file_proto_prysm_v1alpha1_data_columns_proto_goTypes = nil
+	file_proto_prysm_v1alpha1_data_columns_proto_depIdxs = nil
+}

proto/prysm/v1alpha1/data_columns.proto

@@ -0,0 +1,41 @@
+// Copyright 2024 Offchain Labs.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+syntax = "proto3";
+
+package ethereum.eth.v1alpha1;
+
+import "proto/eth/ext/options.proto";
+import "proto/prysm/v1alpha1/beacon_block.proto";
+
+option csharp_namespace = "Ethereum.Eth.v1alpha1";
+option go_package = "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1;eth";
+option java_multiple_files = true;
+option java_outer_classname = "DataColumnsProto";
+option java_package = "org.ethereum.eth.v1alpha1";
+option php_namespace = "Ethereum\\Eth\\v1alpha1";
+
+
+message DataColumnSidecar {
+  uint64 column_index = 1;
+  repeated bytes data_column = 2 [(ethereum.eth.ext.ssz_size) = "?,bytes_per_cell.size", (ethereum.eth.ext.ssz_max)  = "max_blob_commitments.size"];
+  repeated bytes kzg_commitments = 3 [(ethereum.eth.ext.ssz_size) = "?,48", (ethereum.eth.ext.ssz_max)  = "max_blob_commitments.size"];
+  repeated bytes kzg_proof = 4 [(ethereum.eth.ext.ssz_size) = "?,48", (ethereum.eth.ext.ssz_max)  = "max_blob_commitments.size"];
+  SignedBeaconBlockHeader signed_block_header = 5;
+  repeated bytes kzg_commitments_inclusion_proof = 6  [(ethereum.eth.ext.ssz_size) = "kzg_commitments_inclusion_proof_depth.size,32"];
+}
+
+message DataColumnIdentifier {
+  bytes block_root = 1 [(ethereum.eth.ext.ssz_size) = "32"];
+  uint64 column_index = 2;
+}

proto/prysm/v1alpha1/electra.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 5ca1c2c4e61b47b1f8185b3e9c477ae280f82e1483b88d4e11fa214452da5117
+// Hash: bce36d386a65c91018c9a1edaacd2ed0f09cc4dce59fdc5f014fbd9e05bfee77
 package eth
 
 import (
@@ -4410,7 +4410,7 @@ func (l *LightClientUpdateElectra) MarshalSSZ() ([]byte, error) {
 // MarshalSSZTo ssz marshals the LightClientUpdateElectra object to a target array
 func (l *LightClientUpdateElectra) MarshalSSZTo(buf []byte) (dst []byte, err error) {
 	dst = buf
-	offset := int(25184)
+	offset := int(25216)
 
 	// Offset (0) 'AttestedHeader'
 	dst = ssz.WriteOffset(dst, offset)
@@ -4448,11 +4448,11 @@ func (l *LightClientUpdateElectra) MarshalSSZTo(buf []byte) (dst []byte, err err
 	offset += l.FinalizedHeader.SizeSSZ()
 
 	// Field (4) 'FinalityBranch'
-	if size := len(l.FinalityBranch); size != 6 {
-		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+	if size := len(l.FinalityBranch); size != 7 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 7)
 		return
 	}
-	for ii := 0; ii < 6; ii++ {
+	for ii := 0; ii < 7; ii++ {
 		if size := len(l.FinalityBranch[ii]); size != 32 {
 			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
 			return
@@ -4488,7 +4488,7 @@ func (l *LightClientUpdateElectra) MarshalSSZTo(buf []byte) (dst []byte, err err
 func (l *LightClientUpdateElectra) UnmarshalSSZ(buf []byte) error {
 	var err error
 	size := uint64(len(buf))
-	if size < 25184 {
+	if size < 25216 {
 		return ssz.ErrSize
 	}
 
@@ -4500,7 +4500,7 @@ func (l *LightClientUpdateElectra) UnmarshalSSZ(buf []byte) error {
 		return ssz.ErrOffset
 	}
 
-	if o0 != 25184 {
+	if o0 != 25216 {
 		return ssz.ErrInvalidVariableOffset
 	}
 
@@ -4527,24 +4527,24 @@ func (l *LightClientUpdateElectra) UnmarshalSSZ(buf []byte) error {
 	}
 
 	// Field (4) 'FinalityBranch'
-	l.FinalityBranch = make([][]byte, 6)
-	for ii := 0; ii < 6; ii++ {
+	l.FinalityBranch = make([][]byte, 7)
+	for ii := 0; ii < 7; ii++ {
 		if cap(l.FinalityBranch[ii]) == 0 {
-			l.FinalityBranch[ii] = make([]byte, 0, len(buf[24824:25016][ii*32:(ii+1)*32]))
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[24824:25048][ii*32:(ii+1)*32]))
 		}
-		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[24824:25016][ii*32:(ii+1)*32]...)
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[24824:25048][ii*32:(ii+1)*32]...)
 	}
 
 	// Field (5) 'SyncAggregate'
 	if l.SyncAggregate == nil {
 		l.SyncAggregate = new(SyncAggregate)
 	}
-	if err = l.SyncAggregate.UnmarshalSSZ(buf[25016:25176]); err != nil {
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[25048:25208]); err != nil {
 		return err
 	}
 
 	// Field (6) 'SignatureSlot'
-	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[25176:25184]))
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[25208:25216]))
 
 	// Field (0) 'AttestedHeader'
 	{
@@ -4572,7 +4572,7 @@ func (l *LightClientUpdateElectra) UnmarshalSSZ(buf []byte) error {
 
 // SizeSSZ returns the ssz encoded size in bytes for the LightClientUpdateElectra object
 func (l *LightClientUpdateElectra) SizeSSZ() (size int) {
-	size = 25184
+	size = 25216
 
 	// Field (0) 'AttestedHeader'
 	if l.AttestedHeader == nil {
@@ -4632,8 +4632,8 @@ func (l *LightClientUpdateElectra) HashTreeRootWith(hh *ssz.Hasher) (err error)
 
 	// Field (4) 'FinalityBranch'
 	{
-		if size := len(l.FinalityBranch); size != 6 {
-			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		if size := len(l.FinalityBranch); size != 7 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 7)
 			return
 		}
 		subIndx := hh.Index()
@@ -4658,3 +4658,245 @@ func (l *LightClientUpdateElectra) HashTreeRootWith(hh *ssz.Hasher) (err error)
 	hh.Merkleize(indx)
 	return
 }
+
+// MarshalSSZ ssz marshals the LightClientFinalityUpdateElectra object
+func (l *LightClientFinalityUpdateElectra) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientFinalityUpdateElectra object to a target array
+func (l *LightClientFinalityUpdateElectra) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(180)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Offset (1) 'FinalizedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.FinalizedHeader.SizeSSZ()
+
+	// Offset (2) 'FinalityBranch'
+	dst = ssz.WriteOffset(dst, offset)
+	for ii := 0; ii < len(l.FinalityBranch); ii++ {
+		offset += 4
+		offset += len(l.FinalityBranch[ii])
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size > 7 {
+		err = ssz.ErrListTooBigFn("--.FinalityBranch", size, 7)
+		return
+	}
+	{
+		offset = 4 * len(l.FinalityBranch)
+		for ii := 0; ii < len(l.FinalityBranch); ii++ {
+			dst = ssz.WriteOffset(dst, offset)
+			offset += len(l.FinalityBranch[ii])
+		}
+	}
+	for ii := 0; ii < len(l.FinalityBranch); ii++ {
+		if size := len(l.FinalityBranch[ii]); size > 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientFinalityUpdateElectra object
+func (l *LightClientFinalityUpdateElectra) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 180 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o1, o2 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 180 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (1) 'FinalizedHeader'
+	if o1 = ssz.ReadOffset(buf[4:8]); o1 > size || o0 > o1 {
+		return ssz.ErrOffset
+	}
+
+	// Offset (2) 'FinalityBranch'
+	if o2 = ssz.ReadOffset(buf[8:12]); o2 > size || o1 > o2 {
+		return ssz.ErrOffset
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[12:172]); err != nil {
+		return err
+	}
+
+	// Field (4) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[172:180]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:o1]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (1) 'FinalizedHeader'
+	{
+		buf = tail[o1:o2]
+		if l.FinalizedHeader == nil {
+			l.FinalizedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.FinalizedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (2) 'FinalityBranch'
+	{
+		buf = tail[o2:]
+		num, err := ssz.DecodeDynamicLength(buf, 7)
+		if err != nil {
+			return err
+		}
+		l.FinalityBranch = make([][]byte, num)
+		err = ssz.UnmarshalDynamic(buf, num, func(indx int, buf []byte) (err error) {
+			if len(buf) > 32 {
+				return ssz.ErrBytesLength
+			}
+			if cap(l.FinalityBranch[indx]) == 0 {
+				l.FinalityBranch[indx] = make([]byte, 0, len(buf))
+			}
+			l.FinalityBranch[indx] = append(l.FinalityBranch[indx], buf...)
+			return nil
+		})
+		if err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientFinalityUpdateElectra object
+func (l *LightClientFinalityUpdateElectra) SizeSSZ() (size int) {
+	size = 180
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.FinalizedHeader.SizeSSZ()
+
+	// Field (2) 'FinalityBranch'
+	for ii := 0; ii < len(l.FinalityBranch); ii++ {
+		size += 4
+		size += len(l.FinalityBranch[ii])
+	}
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientFinalityUpdateElectra object
+func (l *LightClientFinalityUpdateElectra) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientFinalityUpdateElectra object with a hasher
+func (l *LightClientFinalityUpdateElectra) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'FinalityBranch'
+	{
+		subIndx := hh.Index()
+		num := uint64(len(l.FinalityBranch))
+		if num > 7 {
+			err = ssz.ErrIncorrectListSize
+			return
+		}
+		for _, elem := range l.FinalityBranch {
+			{
+				elemIndx := hh.Index()
+				byteLen := uint64(len(elem))
+				if byteLen > 32 {
+					err = ssz.ErrIncorrectListSize
+					return
+				}
+				hh.AppendBytes32(elem)
+				hh.MerkleizeWithMixin(elemIndx, byteLen, (32+31)/32)
+			}
+		}
+		hh.MerkleizeWithMixin(subIndx, num, 7)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}

proto/prysm/v1alpha1/fulu.ssz.go

@@ -0,0 +1,377 @@
+// Code generated by fastssz. DO NOT EDIT.
+// Hash: 4a3e60c60f0d0729fe9feb7ebc13fa7a8dda757273542e39821ecbd42fe1422d
+package eth
+
+import (
+	ssz "github.com/prysmaticlabs/fastssz"
+)
+
+// MarshalSSZ ssz marshals the DataColumnSidecar object
+func (d *DataColumnSidecar) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(d)
+}
+
+// MarshalSSZTo ssz marshals the DataColumnSidecar object to a target array
+func (d *DataColumnSidecar) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(356)
+
+	// Field (0) 'ColumnIndex'
+	dst = ssz.MarshalUint64(dst, d.ColumnIndex)
+
+	// Offset (1) 'DataColumn'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.DataColumn) * 2048
+
+	// Offset (2) 'KzgCommitments'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.KzgCommitments) * 48
+
+	// Offset (3) 'KzgProof'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.KzgProof) * 48
+
+	// Field (4) 'SignedBlockHeader'
+	if d.SignedBlockHeader == nil {
+		d.SignedBlockHeader = new(SignedBeaconBlockHeader)
+	}
+	if dst, err = d.SignedBlockHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (5) 'KzgCommitmentsInclusionProof'
+	if size := len(d.KzgCommitmentsInclusionProof); size != 4 {
+		err = ssz.ErrVectorLengthFn("--.KzgCommitmentsInclusionProof", size, 4)
+		return
+	}
+	for ii := 0; ii < 4; ii++ {
+		if size := len(d.KzgCommitmentsInclusionProof[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.KzgCommitmentsInclusionProof[ii]", size, 32)
+			return
+		}
+		dst = append(dst, d.KzgCommitmentsInclusionProof[ii]...)
+	}
+
+	// Field (1) 'DataColumn'
+	if size := len(d.DataColumn); size > 4096 {
+		err = ssz.ErrListTooBigFn("--.DataColumn", size, 4096)
+		return
+	}
+	for ii := 0; ii < len(d.DataColumn); ii++ {
+		if size := len(d.DataColumn[ii]); size != 2048 {
+			err = ssz.ErrBytesLengthFn("--.DataColumn[ii]", size, 2048)
+			return
+		}
+		dst = append(dst, d.DataColumn[ii]...)
+	}
+
+	// Field (2) 'KzgCommitments'
+	if size := len(d.KzgCommitments); size > 4096 {
+		err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4096)
+		return
+	}
+	for ii := 0; ii < len(d.KzgCommitments); ii++ {
+		if size := len(d.KzgCommitments[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.KzgCommitments[ii]", size, 48)
+			return
+		}
+		dst = append(dst, d.KzgCommitments[ii]...)
+	}
+
+	// Field (3) 'KzgProof'
+	if size := len(d.KzgProof); size > 4096 {
+		err = ssz.ErrListTooBigFn("--.KzgProof", size, 4096)
+		return
+	}
+	for ii := 0; ii < len(d.KzgProof); ii++ {
+		if size := len(d.KzgProof[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.KzgProof[ii]", size, 48)
+			return
+		}
+		dst = append(dst, d.KzgProof[ii]...)
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the DataColumnSidecar object
+func (d *DataColumnSidecar) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 356 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o1, o2, o3 uint64
+
+	// Field (0) 'ColumnIndex'
+	d.ColumnIndex = ssz.UnmarshallUint64(buf[0:8])
+
+	// Offset (1) 'DataColumn'
+	if o1 = ssz.ReadOffset(buf[8:12]); o1 > size {
+		return ssz.ErrOffset
+	}
+
+	if o1 != 356 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (2) 'KzgCommitments'
+	if o2 = ssz.ReadOffset(buf[12:16]); o2 > size || o1 > o2 {
+		return ssz.ErrOffset
+	}
+
+	// Offset (3) 'KzgProof'
+	if o3 = ssz.ReadOffset(buf[16:20]); o3 > size || o2 > o3 {
+		return ssz.ErrOffset
+	}
+
+	// Field (4) 'SignedBlockHeader'
+	if d.SignedBlockHeader == nil {
+		d.SignedBlockHeader = new(SignedBeaconBlockHeader)
+	}
+	if err = d.SignedBlockHeader.UnmarshalSSZ(buf[20:228]); err != nil {
+		return err
+	}
+
+	// Field (5) 'KzgCommitmentsInclusionProof'
+	d.KzgCommitmentsInclusionProof = make([][]byte, 4)
+	for ii := 0; ii < 4; ii++ {
+		if cap(d.KzgCommitmentsInclusionProof[ii]) == 0 {
+			d.KzgCommitmentsInclusionProof[ii] = make([]byte, 0, len(buf[228:356][ii*32:(ii+1)*32]))
+		}
+		d.KzgCommitmentsInclusionProof[ii] = append(d.KzgCommitmentsInclusionProof[ii], buf[228:356][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (1) 'DataColumn'
+	{
+		buf = tail[o1:o2]
+		num, err := ssz.DivideInt2(len(buf), 2048, 4096)
+		if err != nil {
+			return err
+		}
+		d.DataColumn = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(d.DataColumn[ii]) == 0 {
+				d.DataColumn[ii] = make([]byte, 0, len(buf[ii*2048:(ii+1)*2048]))
+			}
+			d.DataColumn[ii] = append(d.DataColumn[ii], buf[ii*2048:(ii+1)*2048]...)
+		}
+	}
+
+	// Field (2) 'KzgCommitments'
+	{
+		buf = tail[o2:o3]
+		num, err := ssz.DivideInt2(len(buf), 48, 4096)
+		if err != nil {
+			return err
+		}
+		d.KzgCommitments = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(d.KzgCommitments[ii]) == 0 {
+				d.KzgCommitments[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			d.KzgCommitments[ii] = append(d.KzgCommitments[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+
+	// Field (3) 'KzgProof'
+	{
+		buf = tail[o3:]
+		num, err := ssz.DivideInt2(len(buf), 48, 4096)
+		if err != nil {
+			return err
+		}
+		d.KzgProof = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(d.KzgProof[ii]) == 0 {
+				d.KzgProof[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			d.KzgProof[ii] = append(d.KzgProof[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the DataColumnSidecar object
+func (d *DataColumnSidecar) SizeSSZ() (size int) {
+	size = 356
+
+	// Field (1) 'DataColumn'
+	size += len(d.DataColumn) * 2048
+
+	// Field (2) 'KzgCommitments'
+	size += len(d.KzgCommitments) * 48
+
+	// Field (3) 'KzgProof'
+	size += len(d.KzgProof) * 48
+
+	return
+}
+
+// HashTreeRoot ssz hashes the DataColumnSidecar object
+func (d *DataColumnSidecar) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(d)
+}
+
+// HashTreeRootWith ssz hashes the DataColumnSidecar object with a hasher
+func (d *DataColumnSidecar) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'ColumnIndex'
+	hh.PutUint64(d.ColumnIndex)
+
+	// Field (1) 'DataColumn'
+	{
+		if size := len(d.DataColumn); size > 4096 {
+			err = ssz.ErrListTooBigFn("--.DataColumn", size, 4096)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.DataColumn {
+			if len(i) != 2048 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(d.DataColumn))
+		hh.MerkleizeWithMixin(subIndx, numItems, 4096)
+	}
+
+	// Field (2) 'KzgCommitments'
+	{
+		if size := len(d.KzgCommitments); size > 4096 {
+			err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4096)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.KzgCommitments {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(d.KzgCommitments))
+		hh.MerkleizeWithMixin(subIndx, numItems, 4096)
+	}
+
+	// Field (3) 'KzgProof'
+	{
+		if size := len(d.KzgProof); size > 4096 {
+			err = ssz.ErrListTooBigFn("--.KzgProof", size, 4096)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.KzgProof {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(d.KzgProof))
+		hh.MerkleizeWithMixin(subIndx, numItems, 4096)
+	}
+
+	// Field (4) 'SignedBlockHeader'
+	if err = d.SignedBlockHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (5) 'KzgCommitmentsInclusionProof'
+	{
+		if size := len(d.KzgCommitmentsInclusionProof); size != 4 {
+			err = ssz.ErrVectorLengthFn("--.KzgCommitmentsInclusionProof", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.KzgCommitmentsInclusionProof {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the DataColumnIdentifier object
+func (d *DataColumnIdentifier) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(d)
+}
+
+// MarshalSSZTo ssz marshals the DataColumnIdentifier object to a target array
+func (d *DataColumnIdentifier) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'BlockRoot'
+	if size := len(d.BlockRoot); size != 32 {
+		err = ssz.ErrBytesLengthFn("--.BlockRoot", size, 32)
+		return
+	}
+	dst = append(dst, d.BlockRoot...)
+
+	// Field (1) 'ColumnIndex'
+	dst = ssz.MarshalUint64(dst, d.ColumnIndex)
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the DataColumnIdentifier object
+func (d *DataColumnIdentifier) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 40 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'BlockRoot'
+	if cap(d.BlockRoot) == 0 {
+		d.BlockRoot = make([]byte, 0, len(buf[0:32]))
+	}
+	d.BlockRoot = append(d.BlockRoot, buf[0:32]...)
+
+	// Field (1) 'ColumnIndex'
+	d.ColumnIndex = ssz.UnmarshallUint64(buf[32:40])
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the DataColumnIdentifier object
+func (d *DataColumnIdentifier) SizeSSZ() (size int) {
+	size = 40
+	return
+}
+
+// HashTreeRoot ssz hashes the DataColumnIdentifier object
+func (d *DataColumnIdentifier) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(d)
+}
+
+// HashTreeRootWith ssz hashes the DataColumnIdentifier object with a hasher
+func (d *DataColumnIdentifier) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'BlockRoot'
+	if size := len(d.BlockRoot); size != 32 {
+		err = ssz.ErrBytesLengthFn("--.BlockRoot", size, 32)
+		return
+	}
+	hh.PutBytes(d.BlockRoot)
+
+	// Field (1) 'ColumnIndex'
+	hh.PutUint64(d.ColumnIndex)
+
+	hh.Merkleize(indx)
+	return
+}

proto/prysm/v1alpha1/light_client.pb.go

@@ -743,7 +743,7 @@ type LightClientUpdateElectra struct {
 	NextSyncCommittee       *SyncCommittee                                                    `protobuf:"bytes,2,opt,name=next_sync_committee,json=nextSyncCommittee,proto3" json:"next_sync_committee,omitempty"`
 	NextSyncCommitteeBranch [][]byte                                                          `protobuf:"bytes,3,rep,name=next_sync_committee_branch,json=nextSyncCommitteeBranch,proto3" json:"next_sync_committee_branch,omitempty" ssz-size:"6,32"`
 	FinalizedHeader         *LightClientHeaderDeneb                                           `protobuf:"bytes,4,opt,name=finalized_header,json=finalizedHeader,proto3" json:"finalized_header,omitempty"`
-	FinalityBranch          [][]byte                                                          `protobuf:"bytes,5,rep,name=finality_branch,json=finalityBranch,proto3" json:"finality_branch,omitempty" ssz-size:"6,32"`
+	FinalityBranch          [][]byte                                                          `protobuf:"bytes,5,rep,name=finality_branch,json=finalityBranch,proto3" json:"finality_branch,omitempty" ssz-size:"7,32"`
 	SyncAggregate           *SyncAggregate                                                    `protobuf:"bytes,6,opt,name=sync_aggregate,json=syncAggregate,proto3" json:"sync_aggregate,omitempty"`
 	SignatureSlot           github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot `protobuf:"varint,7,opt,name=signature_slot,json=signatureSlot,proto3" json:"signature_slot,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"`
 }
@@ -1066,6 +1066,85 @@ func (x *LightClientFinalityUpdateDeneb) GetSignatureSlot() github_com_prysmatic
 	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(0)
 }
 
+type LightClientFinalityUpdateElectra struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	AttestedHeader  *LightClientHeaderDeneb                                           `protobuf:"bytes,1,opt,name=attested_header,json=attestedHeader,proto3" json:"attested_header,omitempty"`
+	FinalizedHeader *LightClientHeaderDeneb                                           `protobuf:"bytes,2,opt,name=finalized_header,json=finalizedHeader,proto3" json:"finalized_header,omitempty"`
+	FinalityBranch  [][]byte                                                          `protobuf:"bytes,3,rep,name=finality_branch,json=finalityBranch,proto3" json:"finality_branch,omitempty" ssz-max:"7,32"`
+	SyncAggregate   *SyncAggregate                                                    `protobuf:"bytes,4,opt,name=sync_aggregate,json=syncAggregate,proto3" json:"sync_aggregate,omitempty"`
+	SignatureSlot   github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot `protobuf:"varint,5,opt,name=signature_slot,json=signatureSlot,proto3" json:"signature_slot,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"`
+}
+
+func (x *LightClientFinalityUpdateElectra) Reset() {
+	*x = LightClientFinalityUpdateElectra{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[14]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *LightClientFinalityUpdateElectra) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*LightClientFinalityUpdateElectra) ProtoMessage() {}
+
+func (x *LightClientFinalityUpdateElectra) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[14]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use LightClientFinalityUpdateElectra.ProtoReflect.Descriptor instead.
+func (*LightClientFinalityUpdateElectra) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{14}
+}
+
+func (x *LightClientFinalityUpdateElectra) GetAttestedHeader() *LightClientHeaderDeneb {
+	if x != nil {
+		return x.AttestedHeader
+	}
+	return nil
+}
+
+func (x *LightClientFinalityUpdateElectra) GetFinalizedHeader() *LightClientHeaderDeneb {
+	if x != nil {
+		return x.FinalizedHeader
+	}
+	return nil
+}
+
+func (x *LightClientFinalityUpdateElectra) GetFinalityBranch() [][]byte {
+	if x != nil {
+		return x.FinalityBranch
+	}
+	return nil
+}
+
+func (x *LightClientFinalityUpdateElectra) GetSyncAggregate() *SyncAggregate {
+	if x != nil {
+		return x.SyncAggregate
+	}
+	return nil
+}
+
+func (x *LightClientFinalityUpdateElectra) GetSignatureSlot() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot {
+	if x != nil {
+		return x.SignatureSlot
+	}
+	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(0)
+}
+
 type LightClientOptimisticUpdateAltair struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1079,7 +1158,7 @@ type LightClientOptimisticUpdateAltair struct {
 func (x *LightClientOptimisticUpdateAltair) Reset() {
 	*x = LightClientOptimisticUpdateAltair{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[14]
+		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1092,7 +1171,7 @@ func (x *LightClientOptimisticUpdateAltair) String() string {
 func (*LightClientOptimisticUpdateAltair) ProtoMessage() {}
 
 func (x *LightClientOptimisticUpdateAltair) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[14]
+	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1105,7 +1184,7 @@ func (x *LightClientOptimisticUpdateAltair) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use LightClientOptimisticUpdateAltair.ProtoReflect.Descriptor instead.
 func (*LightClientOptimisticUpdateAltair) Descriptor() ([]byte, []int) {
-	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{14}
+	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{15}
 }
 
 func (x *LightClientOptimisticUpdateAltair) GetAttestedHeader() *LightClientHeaderAltair {
@@ -1142,7 +1221,7 @@ type LightClientOptimisticUpdateCapella struct {
 func (x *LightClientOptimisticUpdateCapella) Reset() {
 	*x = LightClientOptimisticUpdateCapella{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[15]
+		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1155,7 +1234,7 @@ func (x *LightClientOptimisticUpdateCapella) String() string {
 func (*LightClientOptimisticUpdateCapella) ProtoMessage() {}
 
 func (x *LightClientOptimisticUpdateCapella) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[15]
+	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1168,7 +1247,7 @@ func (x *LightClientOptimisticUpdateCapella) ProtoReflect() protoreflect.Message
 
 // Deprecated: Use LightClientOptimisticUpdateCapella.ProtoReflect.Descriptor instead.
 func (*LightClientOptimisticUpdateCapella) Descriptor() ([]byte, []int) {
-	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{15}
+	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *LightClientOptimisticUpdateCapella) GetAttestedHeader() *LightClientHeaderCapella {
@@ -1205,7 +1284,7 @@ type LightClientOptimisticUpdateDeneb struct {
 func (x *LightClientOptimisticUpdateDeneb) Reset() {
 	*x = LightClientOptimisticUpdateDeneb{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[16]
+		mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1218,7 +1297,7 @@ func (x *LightClientOptimisticUpdateDeneb) String() string {
 func (*LightClientOptimisticUpdateDeneb) ProtoMessage() {}
 
 func (x *LightClientOptimisticUpdateDeneb) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[16]
+	mi := &file_proto_prysm_v1alpha1_light_client_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1231,7 +1310,7 @@ func (x *LightClientOptimisticUpdateDeneb) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LightClientOptimisticUpdateDeneb.ProtoReflect.Descriptor instead.
 func (*LightClientOptimisticUpdateDeneb) Descriptor() ([]byte, []int) {
-	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{16}
+	return file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP(), []int{17}
 }
 
 func (x *LightClientOptimisticUpdateDeneb) GetAttestedHeader() *LightClientHeaderDeneb {
@@ -1511,7 +1590,7 @@ var file_proto_prysm_v1alpha1_light_client_proto_rawDesc = []byte{
 	0x72, 0x44, 0x65, 0x6e, 0x65, 0x62, 0x52, 0x0f, 0x66, 0x69, 0x6e, 0x61, 0x6c, 0x69, 0x7a, 0x65,
 	0x64, 0x48, 0x65, 0x61, 0x64, 0x65, 0x72, 0x12, 0x31, 0x0a, 0x0f, 0x66, 0x69, 0x6e, 0x61, 0x6c,
 	0x69, 0x74, 0x79, 0x5f, 0x62, 0x72, 0x61, 0x6e, 0x63, 0x68, 0x18, 0x05, 0x20, 0x03, 0x28, 0x0c,
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 }
 
 var (
@@ -1693,7 +1800,7 @@ func file_proto_prysm_v1alpha1_light_client_proto_rawDescGZIP() []byte {
 	return file_proto_prysm_v1alpha1_light_client_proto_rawDescData
 }
 
-var file_proto_prysm_v1alpha1_light_client_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
+var file_proto_prysm_v1alpha1_light_client_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
 var file_proto_prysm_v1alpha1_light_client_proto_goTypes = []interface{}{
 	(*LightClientHeaderAltair)(nil),            // 0: ethereum.eth.v1alpha1.LightClientHeaderAltair
 	(*LightClientHeaderCapella)(nil),           // 1: ethereum.eth.v1alpha1.LightClientHeaderCapella
@@ -1709,65 +1816,69 @@ var file_proto_prysm_v1alpha1_light_client_proto_goTypes = []interface{}{
 	(*LightClientFinalityUpdateAltair)(nil),    // 11: ethereum.eth.v1alpha1.LightClientFinalityUpdateAltair
 	(*LightClientFinalityUpdateCapella)(nil),   // 12: ethereum.eth.v1alpha1.LightClientFinalityUpdateCapella
 	(*LightClientFinalityUpdateDeneb)(nil),     // 13: ethereum.eth.v1alpha1.LightClientFinalityUpdateDeneb
-	(*LightClientOptimisticUpdateAltair)(nil),  // 14: ethereum.eth.v1alpha1.LightClientOptimisticUpdateAltair
-	(*LightClientOptimisticUpdateCapella)(nil), // 15: ethereum.eth.v1alpha1.LightClientOptimisticUpdateCapella
-	(*LightClientOptimisticUpdateDeneb)(nil),   // 16: ethereum.eth.v1alpha1.LightClientOptimisticUpdateDeneb
-	(*BeaconBlockHeader)(nil),                  // 17: ethereum.eth.v1alpha1.BeaconBlockHeader
-	(*v1.ExecutionPayloadHeaderCapella)(nil),   // 18: ethereum.engine.v1.ExecutionPayloadHeaderCapella
-	(*v1.ExecutionPayloadHeaderDeneb)(nil),     // 19: ethereum.engine.v1.ExecutionPayloadHeaderDeneb
-	(*SyncCommittee)(nil),                      // 20: ethereum.eth.v1alpha1.SyncCommittee
-	(*SyncAggregate)(nil),                      // 21: ethereum.eth.v1alpha1.SyncAggregate
+	(*LightClientFinalityUpdateElectra)(nil),   // 14: ethereum.eth.v1alpha1.LightClientFinalityUpdateElectra
+	(*LightClientOptimisticUpdateAltair)(nil),  // 15: ethereum.eth.v1alpha1.LightClientOptimisticUpdateAltair
+	(*LightClientOptimisticUpdateCapella)(nil), // 16: ethereum.eth.v1alpha1.LightClientOptimisticUpdateCapella
+	(*LightClientOptimisticUpdateDeneb)(nil),   // 17: ethereum.eth.v1alpha1.LightClientOptimisticUpdateDeneb
+	(*BeaconBlockHeader)(nil),                  // 18: ethereum.eth.v1alpha1.BeaconBlockHeader
+	(*v1.ExecutionPayloadHeaderCapella)(nil),   // 19: ethereum.engine.v1.ExecutionPayloadHeaderCapella
+	(*v1.ExecutionPayloadHeaderDeneb)(nil),     // 20: ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	(*SyncCommittee)(nil),                      // 21: ethereum.eth.v1alpha1.SyncCommittee
+	(*SyncAggregate)(nil),                      // 22: ethereum.eth.v1alpha1.SyncAggregate
 }
 var file_proto_prysm_v1alpha1_light_client_proto_depIdxs = []int32{
-	17, // 0: ethereum.eth.v1alpha1.LightClientHeaderAltair.beacon:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
-	17, // 1: ethereum.eth.v1alpha1.LightClientHeaderCapella.beacon:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
-	18, // 2: ethereum.eth.v1alpha1.LightClientHeaderCapella.execution:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
-	17, // 3: ethereum.eth.v1alpha1.LightClientHeaderDeneb.beacon:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
-	19, // 4: ethereum.eth.v1alpha1.LightClientHeaderDeneb.execution:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	18, // 0: ethereum.eth.v1alpha1.LightClientHeaderAltair.beacon:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
+	18, // 1: ethereum.eth.v1alpha1.LightClientHeaderCapella.beacon:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
+	19, // 2: ethereum.eth.v1alpha1.LightClientHeaderCapella.execution:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
+	18, // 3: ethereum.eth.v1alpha1.LightClientHeaderDeneb.beacon:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
+	20, // 4: ethereum.eth.v1alpha1.LightClientHeaderDeneb.execution:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderDeneb
 	0,  // 5: ethereum.eth.v1alpha1.LightClientBootstrapAltair.header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
-	20, // 6: ethereum.eth.v1alpha1.LightClientBootstrapAltair.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 6: ethereum.eth.v1alpha1.LightClientBootstrapAltair.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	1,  // 7: ethereum.eth.v1alpha1.LightClientBootstrapCapella.header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
-	20, // 8: ethereum.eth.v1alpha1.LightClientBootstrapCapella.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 8: ethereum.eth.v1alpha1.LightClientBootstrapCapella.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	2,  // 9: ethereum.eth.v1alpha1.LightClientBootstrapDeneb.header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	20, // 10: ethereum.eth.v1alpha1.LightClientBootstrapDeneb.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 10: ethereum.eth.v1alpha1.LightClientBootstrapDeneb.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	2,  // 11: ethereum.eth.v1alpha1.LightClientBootstrapElectra.header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	20, // 12: ethereum.eth.v1alpha1.LightClientBootstrapElectra.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 12: ethereum.eth.v1alpha1.LightClientBootstrapElectra.current_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	0,  // 13: ethereum.eth.v1alpha1.LightClientUpdateAltair.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
-	20, // 14: ethereum.eth.v1alpha1.LightClientUpdateAltair.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 14: ethereum.eth.v1alpha1.LightClientUpdateAltair.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	0,  // 15: ethereum.eth.v1alpha1.LightClientUpdateAltair.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
-	21, // 16: ethereum.eth.v1alpha1.LightClientUpdateAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	22, // 16: ethereum.eth.v1alpha1.LightClientUpdateAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	1,  // 17: ethereum.eth.v1alpha1.LightClientUpdateCapella.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
-	20, // 18: ethereum.eth.v1alpha1.LightClientUpdateCapella.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 18: ethereum.eth.v1alpha1.LightClientUpdateCapella.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	1,  // 19: ethereum.eth.v1alpha1.LightClientUpdateCapella.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
-	21, // 20: ethereum.eth.v1alpha1.LightClientUpdateCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	22, // 20: ethereum.eth.v1alpha1.LightClientUpdateCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	2,  // 21: ethereum.eth.v1alpha1.LightClientUpdateDeneb.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	20, // 22: ethereum.eth.v1alpha1.LightClientUpdateDeneb.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 22: ethereum.eth.v1alpha1.LightClientUpdateDeneb.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	2,  // 23: ethereum.eth.v1alpha1.LightClientUpdateDeneb.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	21, // 24: ethereum.eth.v1alpha1.LightClientUpdateDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	22, // 24: ethereum.eth.v1alpha1.LightClientUpdateDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	2,  // 25: ethereum.eth.v1alpha1.LightClientUpdateElectra.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	20, // 26: ethereum.eth.v1alpha1.LightClientUpdateElectra.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
+	21, // 26: ethereum.eth.v1alpha1.LightClientUpdateElectra.next_sync_committee:type_name -> ethereum.eth.v1alpha1.SyncCommittee
 	2,  // 27: ethereum.eth.v1alpha1.LightClientUpdateElectra.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	21, // 28: ethereum.eth.v1alpha1.LightClientUpdateElectra.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	22, // 28: ethereum.eth.v1alpha1.LightClientUpdateElectra.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	0,  // 29: ethereum.eth.v1alpha1.LightClientFinalityUpdateAltair.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
 	0,  // 30: ethereum.eth.v1alpha1.LightClientFinalityUpdateAltair.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
-	21, // 31: ethereum.eth.v1alpha1.LightClientFinalityUpdateAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	22, // 31: ethereum.eth.v1alpha1.LightClientFinalityUpdateAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	1,  // 32: ethereum.eth.v1alpha1.LightClientFinalityUpdateCapella.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
 	1,  // 33: ethereum.eth.v1alpha1.LightClientFinalityUpdateCapella.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
-	21, // 34: ethereum.eth.v1alpha1.LightClientFinalityUpdateCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	22, // 34: ethereum.eth.v1alpha1.LightClientFinalityUpdateCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	2,  // 35: ethereum.eth.v1alpha1.LightClientFinalityUpdateDeneb.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
 	2,  // 36: ethereum.eth.v1alpha1.LightClientFinalityUpdateDeneb.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	21, // 37: ethereum.eth.v1alpha1.LightClientFinalityUpdateDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	0,  // 38: ethereum.eth.v1alpha1.LightClientOptimisticUpdateAltair.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
-	21, // 39: ethereum.eth.v1alpha1.LightClientOptimisticUpdateAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	1,  // 40: ethereum.eth.v1alpha1.LightClientOptimisticUpdateCapella.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
-	21, // 41: ethereum.eth.v1alpha1.LightClientOptimisticUpdateCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	2,  // 42: ethereum.eth.v1alpha1.LightClientOptimisticUpdateDeneb.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
-	21, // 43: ethereum.eth.v1alpha1.LightClientOptimisticUpdateDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	44, // [44:44] is the sub-list for method output_type
-	44, // [44:44] is the sub-list for method input_type
-	44, // [44:44] is the sub-list for extension type_name
-	44, // [44:44] is the sub-list for extension extendee
-	0,  // [0:44] is the sub-list for field type_name
+	22, // 37: ethereum.eth.v1alpha1.LightClientFinalityUpdateDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	2,  // 38: ethereum.eth.v1alpha1.LightClientFinalityUpdateElectra.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
+	2,  // 39: ethereum.eth.v1alpha1.LightClientFinalityUpdateElectra.finalized_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
+	22, // 40: ethereum.eth.v1alpha1.LightClientFinalityUpdateElectra.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	0,  // 41: ethereum.eth.v1alpha1.LightClientOptimisticUpdateAltair.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderAltair
+	22, // 42: ethereum.eth.v1alpha1.LightClientOptimisticUpdateAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	1,  // 43: ethereum.eth.v1alpha1.LightClientOptimisticUpdateCapella.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderCapella
+	22, // 44: ethereum.eth.v1alpha1.LightClientOptimisticUpdateCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	2,  // 45: ethereum.eth.v1alpha1.LightClientOptimisticUpdateDeneb.attested_header:type_name -> ethereum.eth.v1alpha1.LightClientHeaderDeneb
+	22, // 46: ethereum.eth.v1alpha1.LightClientOptimisticUpdateDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	47, // [47:47] is the sub-list for method output_type
+	47, // [47:47] is the sub-list for method input_type
+	47, // [47:47] is the sub-list for extension type_name
+	47, // [47:47] is the sub-list for extension extendee
+	0,  // [0:47] is the sub-list for field type_name
 }
 
 func init() { file_proto_prysm_v1alpha1_light_client_proto_init() }
@@ -1947,7 +2058,7 @@ func file_proto_prysm_v1alpha1_light_client_proto_init() {
 			}
 		}
 		file_proto_prysm_v1alpha1_light_client_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LightClientOptimisticUpdateAltair); i {
+			switch v := v.(*LightClientFinalityUpdateElectra); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1959,7 +2070,7 @@ func file_proto_prysm_v1alpha1_light_client_proto_init() {
 			}
 		}
 		file_proto_prysm_v1alpha1_light_client_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LightClientOptimisticUpdateCapella); i {
+			switch v := v.(*LightClientOptimisticUpdateAltair); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1971,6 +2082,18 @@ func file_proto_prysm_v1alpha1_light_client_proto_init() {
 			}
 		}
 		file_proto_prysm_v1alpha1_light_client_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*LightClientOptimisticUpdateCapella); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_light_client_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*LightClientOptimisticUpdateDeneb); i {
 			case 0:
 				return &v.state
@@ -1989,7 +2112,7 @@ func file_proto_prysm_v1alpha1_light_client_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_prysm_v1alpha1_light_client_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   17,
+			NumMessages:   18,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

proto/prysm/v1alpha1/light_client.proto

@@ -102,7 +102,7 @@ message LightClientUpdateElectra {
   SyncCommittee next_sync_committee = 2;
   repeated bytes next_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "6,32"];
   LightClientHeaderDeneb finalized_header = 4;
-  repeated bytes finality_branch = 5 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  repeated bytes finality_branch = 5 [(ethereum.eth.ext.ssz_size) = "7,32"];
   SyncAggregate sync_aggregate = 6;
   uint64 signature_slot = 7 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
 }
@@ -131,6 +131,14 @@ message LightClientFinalityUpdateDeneb {
   uint64 signature_slot = 5 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
 }
 
+message LightClientFinalityUpdateElectra {
+  LightClientHeaderDeneb attested_header = 1;
+  LightClientHeaderDeneb finalized_header = 2;
+  repeated bytes finality_branch = 3 [(ethereum.eth.ext.ssz_max) = "7,32"];
+  SyncAggregate sync_aggregate = 4;
+  uint64 signature_slot = 5 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
 message LightClientOptimisticUpdateAltair {
   LightClientHeaderAltair attested_header = 1;
   SyncAggregate sync_aggregate = 2;

proto/prysm/v1alpha1/non-core.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: bfd7d6b556134c3bd236b880245717aa01ae79573b33f2746a08c165ba5dcedb
+// Hash: c9ac7a1f653faa9b9d8f1ffba7c326db17da4f0005bf98299770bc52c93c7e11
 package eth
 
 import (
@@ -551,6 +551,106 @@ func (m *MetaDataV1) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	return
 }
 
+// MarshalSSZ ssz marshals the MetaDataV2 object
+func (m *MetaDataV2) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(m)
+}
+
+// MarshalSSZTo ssz marshals the MetaDataV2 object to a target array
+func (m *MetaDataV2) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'SeqNumber'
+	dst = ssz.MarshalUint64(dst, m.SeqNumber)
+
+	// Field (1) 'Attnets'
+	if size := len(m.Attnets); size != 8 {
+		err = ssz.ErrBytesLengthFn("--.Attnets", size, 8)
+		return
+	}
+	dst = append(dst, m.Attnets...)
+
+	// Field (2) 'Syncnets'
+	if size := len(m.Syncnets); size != 1 {
+		err = ssz.ErrBytesLengthFn("--.Syncnets", size, 1)
+		return
+	}
+	dst = append(dst, m.Syncnets...)
+
+	// Field (3) 'CustodySubnetCount'
+	dst = ssz.MarshalUint64(dst, m.CustodySubnetCount)
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the MetaDataV2 object
+func (m *MetaDataV2) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 25 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'SeqNumber'
+	m.SeqNumber = ssz.UnmarshallUint64(buf[0:8])
+
+	// Field (1) 'Attnets'
+	if cap(m.Attnets) == 0 {
+		m.Attnets = make([]byte, 0, len(buf[8:16]))
+	}
+	m.Attnets = append(m.Attnets, buf[8:16]...)
+
+	// Field (2) 'Syncnets'
+	if cap(m.Syncnets) == 0 {
+		m.Syncnets = make([]byte, 0, len(buf[16:17]))
+	}
+	m.Syncnets = append(m.Syncnets, buf[16:17]...)
+
+	// Field (3) 'CustodySubnetCount'
+	m.CustodySubnetCount = ssz.UnmarshallUint64(buf[17:25])
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the MetaDataV2 object
+func (m *MetaDataV2) SizeSSZ() (size int) {
+	size = 25
+	return
+}
+
+// HashTreeRoot ssz hashes the MetaDataV2 object
+func (m *MetaDataV2) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(m)
+}
+
+// HashTreeRootWith ssz hashes the MetaDataV2 object with a hasher
+func (m *MetaDataV2) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'SeqNumber'
+	hh.PutUint64(m.SeqNumber)
+
+	// Field (1) 'Attnets'
+	if size := len(m.Attnets); size != 8 {
+		err = ssz.ErrBytesLengthFn("--.Attnets", size, 8)
+		return
+	}
+	hh.PutBytes(m.Attnets)
+
+	// Field (2) 'Syncnets'
+	if size := len(m.Syncnets); size != 1 {
+		err = ssz.ErrBytesLengthFn("--.Syncnets", size, 1)
+		return
+	}
+	hh.PutBytes(m.Syncnets)
+
+	// Field (3) 'CustodySubnetCount'
+	hh.PutUint64(m.CustodySubnetCount)
+
+	hh.Merkleize(indx)
+	return
+}
+
 // MarshalSSZ ssz marshals the BlobSidecarsByRangeRequest object
 func (b *BlobSidecarsByRangeRequest) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(b)
@@ -611,6 +711,124 @@ func (b *BlobSidecarsByRangeRequest) HashTreeRootWith(hh *ssz.Hasher) (err error
 	return
 }
 
+// MarshalSSZ ssz marshals the DataColumnSidecarsByRangeRequest object
+func (d *DataColumnSidecarsByRangeRequest) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(d)
+}
+
+// MarshalSSZTo ssz marshals the DataColumnSidecarsByRangeRequest object to a target array
+func (d *DataColumnSidecarsByRangeRequest) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(20)
+
+	// Field (0) 'StartSlot'
+	dst = ssz.MarshalUint64(dst, uint64(d.StartSlot))
+
+	// Field (1) 'Count'
+	dst = ssz.MarshalUint64(dst, d.Count)
+
+	// Offset (2) 'Columns'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.Columns) * 8
+
+	// Field (2) 'Columns'
+	if size := len(d.Columns); size > 128 {
+		err = ssz.ErrListTooBigFn("--.Columns", size, 128)
+		return
+	}
+	for ii := 0; ii < len(d.Columns); ii++ {
+		dst = ssz.MarshalUint64(dst, d.Columns[ii])
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the DataColumnSidecarsByRangeRequest object
+func (d *DataColumnSidecarsByRangeRequest) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 20 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o2 uint64
+
+	// Field (0) 'StartSlot'
+	d.StartSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[0:8]))
+
+	// Field (1) 'Count'
+	d.Count = ssz.UnmarshallUint64(buf[8:16])
+
+	// Offset (2) 'Columns'
+	if o2 = ssz.ReadOffset(buf[16:20]); o2 > size {
+		return ssz.ErrOffset
+	}
+
+	if o2 != 20 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (2) 'Columns'
+	{
+		buf = tail[o2:]
+		num, err := ssz.DivideInt2(len(buf), 8, 128)
+		if err != nil {
+			return err
+		}
+		d.Columns = ssz.ExtendUint64(d.Columns, num)
+		for ii := 0; ii < num; ii++ {
+			d.Columns[ii] = ssz.UnmarshallUint64(buf[ii*8 : (ii+1)*8])
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the DataColumnSidecarsByRangeRequest object
+func (d *DataColumnSidecarsByRangeRequest) SizeSSZ() (size int) {
+	size = 20
+
+	// Field (2) 'Columns'
+	size += len(d.Columns) * 8
+
+	return
+}
+
+// HashTreeRoot ssz hashes the DataColumnSidecarsByRangeRequest object
+func (d *DataColumnSidecarsByRangeRequest) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(d)
+}
+
+// HashTreeRootWith ssz hashes the DataColumnSidecarsByRangeRequest object with a hasher
+func (d *DataColumnSidecarsByRangeRequest) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'StartSlot'
+	hh.PutUint64(uint64(d.StartSlot))
+
+	// Field (1) 'Count'
+	hh.PutUint64(d.Count)
+
+	// Field (2) 'Columns'
+	{
+		if size := len(d.Columns); size > 128 {
+			err = ssz.ErrListTooBigFn("--.Columns", size, 128)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.Columns {
+			hh.AppendUint64(i)
+		}
+		hh.FillUpTo32()
+
+		numItems := uint64(len(d.Columns))
+		hh.MerkleizeWithMixin(subIndx, numItems, ssz.CalculateLimit(128, numItems, 8))
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
 // MarshalSSZ ssz marshals the DepositSnapshot object
 func (d *DepositSnapshot) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(d)

proto/prysm/v1alpha1/p2p_messages.pb.go

@@ -348,6 +348,77 @@ func (x *MetaDataV1) GetSyncnets() github_com_prysmaticlabs_go_bitfield.Bitvecto
 	return github_com_prysmaticlabs_go_bitfield.Bitvector4(nil)
 }
 
+type MetaDataV2 struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	SeqNumber          uint64                                           `protobuf:"varint,1,opt,name=seq_number,json=seqNumber,proto3" json:"seq_number,omitempty"`
+	Attnets            github_com_prysmaticlabs_go_bitfield.Bitvector64 `protobuf:"bytes,2,opt,name=attnets,proto3" json:"attnets,omitempty" cast-type:"github.com/prysmaticlabs/go-bitfield.Bitvector64" ssz-size:"8"`
+	Syncnets           github_com_prysmaticlabs_go_bitfield.Bitvector4  `protobuf:"bytes,3,opt,name=syncnets,proto3" json:"syncnets,omitempty" cast-type:"github.com/prysmaticlabs/go-bitfield.Bitvector4" ssz-size:"1"`
+	CustodySubnetCount uint64                                           `protobuf:"varint,4,opt,name=custody_subnet_count,json=custodySubnetCount,proto3" json:"custody_subnet_count,omitempty"`
+}
+
+func (x *MetaDataV2) Reset() {
+	*x = MetaDataV2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MetaDataV2) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MetaDataV2) ProtoMessage() {}
+
+func (x *MetaDataV2) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MetaDataV2.ProtoReflect.Descriptor instead.
+func (*MetaDataV2) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_p2p_messages_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *MetaDataV2) GetSeqNumber() uint64 {
+	if x != nil {
+		return x.SeqNumber
+	}
+	return 0
+}
+
+func (x *MetaDataV2) GetAttnets() github_com_prysmaticlabs_go_bitfield.Bitvector64 {
+	if x != nil {
+		return x.Attnets
+	}
+	return github_com_prysmaticlabs_go_bitfield.Bitvector64(nil)
+}
+
+func (x *MetaDataV2) GetSyncnets() github_com_prysmaticlabs_go_bitfield.Bitvector4 {
+	if x != nil {
+		return x.Syncnets
+	}
+	return github_com_prysmaticlabs_go_bitfield.Bitvector4(nil)
+}
+
+func (x *MetaDataV2) GetCustodySubnetCount() uint64 {
+	if x != nil {
+		return x.CustodySubnetCount
+	}
+	return 0
+}
+
 type BlobSidecarsByRangeRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -360,7 +431,7 @@ type BlobSidecarsByRangeRequest struct {
 func (x *BlobSidecarsByRangeRequest) Reset() {
 	*x = BlobSidecarsByRangeRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[5]
+		mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -373,7 +444,7 @@ func (x *BlobSidecarsByRangeRequest) String() string {
 func (*BlobSidecarsByRangeRequest) ProtoMessage() {}
 
 func (x *BlobSidecarsByRangeRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[5]
+	mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -386,7 +457,7 @@ func (x *BlobSidecarsByRangeRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use BlobSidecarsByRangeRequest.ProtoReflect.Descriptor instead.
 func (*BlobSidecarsByRangeRequest) Descriptor() ([]byte, []int) {
-	return file_proto_prysm_v1alpha1_p2p_messages_proto_rawDescGZIP(), []int{5}
+	return file_proto_prysm_v1alpha1_p2p_messages_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *BlobSidecarsByRangeRequest) GetStartSlot() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot {
@@ -403,6 +474,69 @@ func (x *BlobSidecarsByRangeRequest) GetCount() uint64 {
 	return 0
 }
 
+type DataColumnSidecarsByRangeRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	StartSlot github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot `protobuf:"varint,1,opt,name=start_slot,json=startSlot,proto3" json:"start_slot,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"`
+	Count     uint64                                                            `protobuf:"varint,2,opt,name=count,proto3" json:"count,omitempty"`
+	Columns   []uint64                                                          `protobuf:"varint,3,rep,packed,name=columns,proto3" json:"columns,omitempty" ssz-max:"128"`
+}
+
+func (x *DataColumnSidecarsByRangeRequest) Reset() {
+	*x = DataColumnSidecarsByRangeRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DataColumnSidecarsByRangeRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DataColumnSidecarsByRangeRequest) ProtoMessage() {}
+
+func (x *DataColumnSidecarsByRangeRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DataColumnSidecarsByRangeRequest.ProtoReflect.Descriptor instead.
+func (*DataColumnSidecarsByRangeRequest) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_p2p_messages_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *DataColumnSidecarsByRangeRequest) GetStartSlot() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot {
+	if x != nil {
+		return x.StartSlot
+	}
+	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(0)
+}
+
+func (x *DataColumnSidecarsByRangeRequest) GetCount() uint64 {
+	if x != nil {
+		return x.Count
+	}
+	return 0
+}
+
+func (x *DataColumnSidecarsByRangeRequest) GetColumns() []uint64 {
+	if x != nil {
+		return x.Columns
+	}
+	return nil
+}
+
 var File_proto_prysm_v1alpha1_p2p_messages_proto protoreflect.FileDescriptor
 
 var file_proto_prysm_v1alpha1_p2p_messages_proto_rawDesc = []byte{
@@ -482,27 +616,56 @@ var file_proto_prysm_v1alpha1_p2p_messages_proto_rawDesc = []byte{
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 }
 
 var (
@@ -517,14 +680,16 @@ func file_proto_prysm_v1alpha1_p2p_messages_proto_rawDescGZIP() []byte {
 	return file_proto_prysm_v1alpha1_p2p_messages_proto_rawDescData
 }
 
-var file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
 var file_proto_prysm_v1alpha1_p2p_messages_proto_goTypes = []interface{}{
-	(*Status)(nil),                     // 0: ethereum.eth.v1alpha1.Status
-	(*BeaconBlocksByRangeRequest)(nil), // 1: ethereum.eth.v1alpha1.BeaconBlocksByRangeRequest
-	(*ENRForkID)(nil),                  // 2: ethereum.eth.v1alpha1.ENRForkID
-	(*MetaDataV0)(nil),                 // 3: ethereum.eth.v1alpha1.MetaDataV0
-	(*MetaDataV1)(nil),                 // 4: ethereum.eth.v1alpha1.MetaDataV1
-	(*BlobSidecarsByRangeRequest)(nil), // 5: ethereum.eth.v1alpha1.BlobSidecarsByRangeRequest
+	(*Status)(nil),                           // 0: ethereum.eth.v1alpha1.Status
+	(*BeaconBlocksByRangeRequest)(nil),       // 1: ethereum.eth.v1alpha1.BeaconBlocksByRangeRequest
+	(*ENRForkID)(nil),                        // 2: ethereum.eth.v1alpha1.ENRForkID
+	(*MetaDataV0)(nil),                       // 3: ethereum.eth.v1alpha1.MetaDataV0
+	(*MetaDataV1)(nil),                       // 4: ethereum.eth.v1alpha1.MetaDataV1
+	(*MetaDataV2)(nil),                       // 5: ethereum.eth.v1alpha1.MetaDataV2
+	(*BlobSidecarsByRangeRequest)(nil),       // 6: ethereum.eth.v1alpha1.BlobSidecarsByRangeRequest
+	(*DataColumnSidecarsByRangeRequest)(nil), // 7: ethereum.eth.v1alpha1.DataColumnSidecarsByRangeRequest
 }
 var file_proto_prysm_v1alpha1_p2p_messages_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for method output_type
@@ -601,6 +766,18 @@ func file_proto_prysm_v1alpha1_p2p_messages_proto_init() {
 			}
 		}
 		file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MetaDataV2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*BlobSidecarsByRangeRequest); i {
 			case 0:
 				return &v.state
@@ -612,6 +789,18 @@ func file_proto_prysm_v1alpha1_p2p_messages_proto_init() {
 				return nil
 			}
 		}
+		file_proto_prysm_v1alpha1_p2p_messages_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DataColumnSidecarsByRangeRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -619,7 +808,7 @@ func file_proto_prysm_v1alpha1_p2p_messages_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_prysm_v1alpha1_p2p_messages_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   6,
+			NumMessages:   8,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

proto/prysm/v1alpha1/p2p_messages.proto

@@ -51,6 +51,7 @@ message MetaDataV0 {
  (
  seq_number: uint64
  attnets: Bitvector[ATTESTATION_SUBNET_COUNT]
+ syncnets: Bitvector[SYNC_COMMITTEE_SUBNET_COUNT]
  )
 */
 message MetaDataV1 {
@@ -59,6 +60,23 @@ message MetaDataV1 {
   bytes syncnets = 3 [(ethereum.eth.ext.ssz_size) = "1", (ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/go-bitfield.Bitvector4"];
 }
 
+/*
+ Spec Definition:
+ MetaData
+ (
+ seq_number: uint64
+ attnets: Bitvector[ATTESTATION_SUBNET_COUNT]
+ syncnets: Bitvector[SYNC_COMMITTEE_SUBNET_COUNT]
+ custody_subnet_count: uint64
+ )
+*/
+message MetaDataV2 {
+  uint64 seq_number = 1;
+  bytes attnets = 2 [(ethereum.eth.ext.ssz_size) = "8", (ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/go-bitfield.Bitvector64"];
+  bytes syncnets = 3 [(ethereum.eth.ext.ssz_size) = "1", (ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/go-bitfield.Bitvector4"];
+  uint64 custody_subnet_count = 4;
+}
+
 /*
  Spec Definition:
  (
@@ -70,3 +88,17 @@ message BlobSidecarsByRangeRequest {
   uint64 start_slot = 1 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
   uint64 count = 2;
 }
+
+/*
+Spec Definition:
+(
+  start_slot: Slot
+  count: uint64
+  columns: List[ColumnIndex]
+)
+ */
+message DataColumnSidecarsByRangeRequest {
+  uint64 start_slot = 1 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+  uint64 count = 2;
+  repeated uint64 columns = 3 [(ethereum.eth.ext.ssz_max) = "128"];
+}

proto/ssz_proto_library.bzl

@@ -36,6 +36,11 @@ mainnet = {
     "pending_partial_withdrawals_limit": "134217728",
     "pending_consolidations_limit": "262144",
     "max_consolidation_requests_per_payload.size": "1",
+    "field_elements_per_cell.size": "64",
+    "field_elements_per_ext_blob.size": "8192",
+    "bytes_per_cell.size": "2048",  # FIELD_ELEMENTS_PER_CELL * BYTES_PER_FIELD_ELEMENT
+    "cells_per_blob.size": "128",
+    "kzg_commitments_inclusion_proof_depth.size": "4",
 }
 
 minimal = {
@@ -68,6 +73,11 @@ minimal = {
     "pending_partial_withdrawals_limit": "64",
     "pending_consolidations_limit": "64",
     "max_consolidation_requests_per_payload.size": "1",
+    "field_elements_per_cell.size": "64",
+    "field_elements_per_ext_blob.size": "8192",
+    "bytes_per_cell.size": "2048",  # FIELD_ELEMENTS_PER_CELL * BYTES_PER_FIELD_ELEMENT
+    "cells_per_blob.size": "128",
+    "kzg_commitments_inclusion_proof_depth.size": "4",
 }
 
 ###### Rules definitions #######

testing/spectest/exclusions.txt

@@ -24,179 +24,6 @@ tests/general/phase0/ssz_generic/boolean
 tests/general/phase0/ssz_generic/containers
 tests/general/phase0/ssz_generic/uints
 
-# EIP6110
-tests/mainnet/eip6110/epoch_processing/effective_balance_updates
-tests/mainnet/eip6110/epoch_processing/eth1_data_reset
-tests/mainnet/eip6110/epoch_processing/historical_summaries_update
-tests/mainnet/eip6110/epoch_processing/inactivity_updates
-tests/mainnet/eip6110/epoch_processing/justification_and_finalization
-tests/mainnet/eip6110/epoch_processing/participation_flag_updates
-tests/mainnet/eip6110/epoch_processing/randao_mixes_reset
-tests/mainnet/eip6110/epoch_processing/registry_updates
-tests/mainnet/eip6110/epoch_processing/rewards_and_penalties
-tests/mainnet/eip6110/epoch_processing/slashings
-tests/mainnet/eip6110/epoch_processing/slashings_reset
-tests/mainnet/eip6110/finality/finality
-tests/mainnet/eip6110/fork_choice/ex_ante
-tests/mainnet/eip6110/fork_choice/get_head
-tests/mainnet/eip6110/fork_choice/get_proposer_head
-tests/mainnet/eip6110/fork_choice/on_block
-tests/mainnet/eip6110/fork_choice/should_override_forkchoice_update
-tests/mainnet/eip6110/operations/attestation
-tests/mainnet/eip6110/operations/attester_slashing
-tests/mainnet/eip6110/operations/block_header
-tests/mainnet/eip6110/operations/bls_to_execution_change
-tests/mainnet/eip6110/operations/deposit
-tests/mainnet/eip6110/operations/execution_payload
-tests/mainnet/eip6110/operations/proposer_slashing
-tests/mainnet/eip6110/operations/sync_aggregate
-tests/mainnet/eip6110/operations/voluntary_exit
-tests/mainnet/eip6110/operations/withdrawals
-tests/mainnet/eip6110/rewards/basic
-tests/mainnet/eip6110/rewards/leak
-tests/mainnet/eip6110/rewards/random
-tests/mainnet/eip6110/sanity/blocks
-tests/mainnet/eip6110/sanity/slots
-tests/mainnet/eip6110/ssz_static/AggregateAndProof
-tests/mainnet/eip6110/ssz_static/Attestation
-tests/mainnet/eip6110/ssz_static/AttestationData
-tests/mainnet/eip6110/ssz_static/AttesterSlashing
-tests/mainnet/eip6110/ssz_static/BLSToExecutionChange
-tests/mainnet/eip6110/ssz_static/BeaconBlock
-tests/mainnet/eip6110/ssz_static/BeaconBlockBody
-tests/mainnet/eip6110/ssz_static/BeaconBlockHeader
-tests/mainnet/eip6110/ssz_static/BeaconState
-tests/mainnet/eip6110/ssz_static/BlobIdentifier
-tests/mainnet/eip6110/ssz_static/BlobSidecar
-tests/mainnet/eip6110/ssz_static/Checkpoint
-tests/mainnet/eip6110/ssz_static/ContributionAndProof
-tests/mainnet/eip6110/ssz_static/Deposit
-tests/mainnet/eip6110/ssz_static/DepositData
-tests/mainnet/eip6110/ssz_static/DepositMessage
-tests/mainnet/eip6110/ssz_static/DepositReceipt
-tests/mainnet/eip6110/ssz_static/Eth1Block
-tests/mainnet/eip6110/ssz_static/Eth1Data
-tests/mainnet/eip6110/ssz_static/ExecutionPayload
-tests/mainnet/eip6110/ssz_static/ExecutionPayloadHeader
-tests/mainnet/eip6110/ssz_static/Fork
-tests/mainnet/eip6110/ssz_static/ForkData
-tests/mainnet/eip6110/ssz_static/HistoricalBatch
-tests/mainnet/eip6110/ssz_static/HistoricalSummary
-tests/mainnet/eip6110/ssz_static/IndexedAttestation
-tests/mainnet/eip6110/ssz_static/LightClientBootstrap
-tests/mainnet/eip6110/ssz_static/LightClientFinalityUpdate
-tests/mainnet/eip6110/ssz_static/LightClientHeader
-tests/mainnet/eip6110/ssz_static/LightClientOptimisticUpdate
-tests/mainnet/eip6110/ssz_static/LightClientUpdate
-tests/mainnet/eip6110/ssz_static/PendingAttestation
-tests/mainnet/eip6110/ssz_static/PowBlock
-tests/mainnet/eip6110/ssz_static/ProposerSlashing
-tests/mainnet/eip6110/ssz_static/SignedAggregateAndProof
-tests/mainnet/eip6110/ssz_static/SignedBLSToExecutionChange
-tests/mainnet/eip6110/ssz_static/SignedBeaconBlock
-tests/mainnet/eip6110/ssz_static/SignedBeaconBlockHeader
-tests/mainnet/eip6110/ssz_static/SignedContributionAndProof
-tests/mainnet/eip6110/ssz_static/SignedVoluntaryExit
-tests/mainnet/eip6110/ssz_static/SigningData
-tests/mainnet/eip6110/ssz_static/SyncAggregate
-tests/mainnet/eip6110/ssz_static/SyncAggregatorSelectionData
-tests/mainnet/eip6110/ssz_static/SyncCommittee
-tests/mainnet/eip6110/ssz_static/SyncCommitteeContribution
-tests/mainnet/eip6110/ssz_static/SyncCommitteeMessage
-tests/mainnet/eip6110/ssz_static/Validator
-tests/mainnet/eip6110/ssz_static/VoluntaryExit
-tests/mainnet/eip6110/ssz_static/Withdrawal
-tests/mainnet/eip6110/sync/optimistic
-tests/mainnet/eip6110/transition/core
-tests/minimal/eip6110/epoch_processing/effective_balance_updates
-tests/minimal/eip6110/epoch_processing/eth1_data_reset
-tests/minimal/eip6110/epoch_processing/historical_summaries_update
-tests/minimal/eip6110/epoch_processing/inactivity_updates
-tests/minimal/eip6110/epoch_processing/justification_and_finalization
-tests/minimal/eip6110/epoch_processing/participation_flag_updates
-tests/minimal/eip6110/epoch_processing/randao_mixes_reset
-tests/minimal/eip6110/epoch_processing/registry_updates
-tests/minimal/eip6110/epoch_processing/rewards_and_penalties
-tests/minimal/eip6110/epoch_processing/slashings
-tests/minimal/eip6110/epoch_processing/slashings_reset
-tests/minimal/eip6110/epoch_processing/sync_committee_updates
-tests/minimal/eip6110/finality/finality
-tests/minimal/eip6110/fork_choice/ex_ante
-tests/minimal/eip6110/fork_choice/get_head
-tests/minimal/eip6110/fork_choice/get_proposer_head
-tests/minimal/eip6110/fork_choice/on_block
-tests/minimal/eip6110/fork_choice/reorg
-tests/minimal/eip6110/fork_choice/should_override_forkchoice_update
-tests/minimal/eip6110/fork_choice/withholding
-tests/minimal/eip6110/genesis/initialization
-tests/minimal/eip6110/genesis/validity
-tests/minimal/eip6110/operations/attestation
-tests/minimal/eip6110/operations/attester_slashing
-tests/minimal/eip6110/operations/block_header
-tests/minimal/eip6110/operations/bls_to_execution_change
-tests/minimal/eip6110/operations/deposit
-tests/minimal/eip6110/operations/execution_payload
-tests/minimal/eip6110/operations/proposer_slashing
-tests/minimal/eip6110/operations/sync_aggregate
-tests/minimal/eip6110/operations/voluntary_exit
-tests/minimal/eip6110/operations/withdrawals
-tests/minimal/eip6110/rewards/basic
-tests/minimal/eip6110/rewards/leak
-tests/minimal/eip6110/rewards/random
-tests/minimal/eip6110/sanity/blocks
-tests/minimal/eip6110/sanity/slots
-tests/minimal/eip6110/ssz_static/AggregateAndProof
-tests/minimal/eip6110/ssz_static/Attestation
-tests/minimal/eip6110/ssz_static/AttestationData
-tests/minimal/eip6110/ssz_static/AttesterSlashing
-tests/minimal/eip6110/ssz_static/BLSToExecutionChange
-tests/minimal/eip6110/ssz_static/BeaconBlock
-tests/minimal/eip6110/ssz_static/BeaconBlockBody
-tests/minimal/eip6110/ssz_static/BeaconBlockHeader
-tests/minimal/eip6110/ssz_static/BeaconState
-tests/minimal/eip6110/ssz_static/BlobIdentifier
-tests/minimal/eip6110/ssz_static/BlobSidecar
-tests/minimal/eip6110/ssz_static/Checkpoint
-tests/minimal/eip6110/ssz_static/ContributionAndProof
-tests/minimal/eip6110/ssz_static/Deposit
-tests/minimal/eip6110/ssz_static/DepositData
-tests/minimal/eip6110/ssz_static/DepositMessage
-tests/minimal/eip6110/ssz_static/DepositReceipt
-tests/minimal/eip6110/ssz_static/Eth1Block
-tests/minimal/eip6110/ssz_static/Eth1Data
-tests/minimal/eip6110/ssz_static/ExecutionPayload
-tests/minimal/eip6110/ssz_static/ExecutionPayloadHeader
-tests/minimal/eip6110/ssz_static/Fork
-tests/minimal/eip6110/ssz_static/ForkData
-tests/minimal/eip6110/ssz_static/HistoricalBatch
-tests/minimal/eip6110/ssz_static/HistoricalSummary
-tests/minimal/eip6110/ssz_static/IndexedAttestation
-tests/minimal/eip6110/ssz_static/LightClientBootstrap
-tests/minimal/eip6110/ssz_static/LightClientFinalityUpdate
-tests/minimal/eip6110/ssz_static/LightClientHeader
-tests/minimal/eip6110/ssz_static/LightClientOptimisticUpdate
-tests/minimal/eip6110/ssz_static/LightClientUpdate
-tests/minimal/eip6110/ssz_static/PendingAttestation
-tests/minimal/eip6110/ssz_static/PowBlock
-tests/minimal/eip6110/ssz_static/ProposerSlashing
-tests/minimal/eip6110/ssz_static/SignedAggregateAndProof
-tests/minimal/eip6110/ssz_static/SignedBLSToExecutionChange
-tests/minimal/eip6110/ssz_static/SignedBeaconBlock
-tests/minimal/eip6110/ssz_static/SignedBeaconBlockHeader
-tests/minimal/eip6110/ssz_static/SignedContributionAndProof
-tests/minimal/eip6110/ssz_static/SignedVoluntaryExit
-tests/minimal/eip6110/ssz_static/SigningData
-tests/minimal/eip6110/ssz_static/SyncAggregate
-tests/minimal/eip6110/ssz_static/SyncAggregatorSelectionData
-tests/minimal/eip6110/ssz_static/SyncCommittee
-tests/minimal/eip6110/ssz_static/SyncCommitteeContribution
-tests/minimal/eip6110/ssz_static/SyncCommitteeMessage
-tests/minimal/eip6110/ssz_static/Validator
-tests/minimal/eip6110/ssz_static/VoluntaryExit
-tests/minimal/eip6110/ssz_static/Withdrawal
-tests/minimal/eip6110/sync/optimistic
-tests/minimal/eip6110/transition/core
-
 # Whisk
 tests/mainnet/whisk/ssz_static/AggregateAndProof
 tests/mainnet/whisk/ssz_static/Attestation

testing/spectest/mainnet/electra/merkle_proof/merkle_proof_test.go

@@ -7,6 +7,5 @@ import (
 )
 
 func TestMainnet_Electra_MerkleProof(t *testing.T) {
-	t.Skip("TODO: Electra") // These spectests are missing?
 	merkle_proof.RunMerkleProofTests(t, "mainnet")
 }

testing/spectest/minimal/electra/merkle_proof/merkle_proof_test.go

@@ -7,6 +7,5 @@ import (
 )
 
 func TestMinimal_Electra_MerkleProof(t *testing.T) {
-	t.Skip("TODO: Electra") // These spectests are missing?
 	merkle_proof.RunMerkleProofTests(t, "minimal")
 }

tools/genception/BUILD.bazel

@@ -0,0 +1,5 @@
+alias(
+    name = "methodicalgen",
+    actual = "@com_github_offchainlabs_methodical_ssz//cmd/ssz:ssz",
+    visibility = ["//visibility:public"],
+)

tools/genception/cmd/BUILD.bazel

@@ -0,0 +1,16 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary")
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/tools/genception/cmd",
+    visibility = ["//visibility:private"],
+    deps = ["//tools/genception/driver:go_default_library"],
+)
+
+go_binary(
+    name = "cmd",
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+)

tools/genception/cmd/main.go

@@ -0,0 +1,104 @@
+// Copyright 2021 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"os/signal"
+	"strings"
+
+	"github.com/prysmaticlabs/prysm/v5/tools/genception/driver"
+)
+
+var log = driver.Logger
+
+func run(_ context.Context, in io.Reader, out io.Writer, args []string) error {
+	rec, err := driver.NewRecorder()
+	if err != nil {
+		return fmt.Errorf("unable to initialize recorder: %w", err)
+	}
+	resolver, err := driver.NewPathResolver()
+	if err != nil {
+		return fmt.Errorf("unable to initialize path resolver: %w", err)
+	}
+	jsonFiles, err := driver.LoadJsonListing()
+	if err != nil {
+		return fmt.Errorf("unable to lookup package: %w", err)
+	}
+	pd, err := driver.NewJSONPackagesDriver(jsonFiles, resolver.Resolve)
+	if err != nil {
+		return fmt.Errorf("unable to load JSON files: %w", err)
+	}
+
+	request, err := driver.ReadDriverRequest(in)
+	if err != nil {
+		return fmt.Errorf("unable to read request: %w", err)
+	}
+	if err := rec.RecordRequest(args, request); err != nil {
+		return fmt.Errorf("unable to record request: %w", err)
+	}
+	// Note: we are returning all files required to build a specific package.
+	// For file queries (`file=`), this means that the CompiledGoFiles will
+	// include more than the only file being specified.
+	resp := pd.Handle(request, args)
+	if err := rec.RecordResponse(resp); err != nil {
+		return fmt.Errorf("unable to record response: %w", err)
+	}
+	data, err := json.Marshal(resp)
+	if err != nil {
+		return fmt.Errorf("unable to marshal response: %v", err)
+	}
+	_, err = out.Write(data)
+	recErr := recordResponse(data)
+	if recErr != nil {
+		log.WithError(recErr).Error("unable to record response")
+	}
+	return err
+}
+
+func recordResponse(data []byte) error {
+	path := os.Getenv("GOPACKAGESDRIVER_RESPONSE_PATH")
+	if path == "" {
+		log.Info("GOPACKAGESDRIVER_RESPONSE_PATH not set; set this to a writable directory path if you want to record record the driver response for debugging")
+		return nil
+	}
+	f, err := os.CreateTemp(path, "*_response.json")
+	if err != nil {
+		return err
+	}
+	_, err = f.Write(data)
+	return err
+}
+
+func main() {
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer stop()
+
+	log.WithField("args", strings.Join(os.Args[1:], " ")).Info("genception lookup")
+	if err := run(ctx, os.Stdin, os.Stdout, os.Args[1:]); err != nil {
+		_, err := fmt.Fprintf(os.Stderr, "error: %v", err)
+		if err != nil {
+			log.WithError(err).Error("unhandled error in package resolution")
+		}
+		// gopls will check the packages driver exit code, and if there is an
+		// error, it will fall back to go list. Obviously we don't want that,
+		// so force a 0 exit code.
+		os.Exit(0)
+	}
+}

tools/genception/driver/BUILD.bazel

@@ -0,0 +1,33 @@
+load("@prysm//tools/go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "bazel_json_builder.go",
+        "build_context.go",
+        "driver_request.go",
+        "flatpackage.go",
+        "index.go",
+        "json_packages_driver.go",
+        "logger.go",
+        "packageregistry.go",
+        "recorder.go",
+    ],
+    importpath = "github.com/prysmaticlabs/prysm/v5/tools/genception/driver",
+    visibility = ["//visibility:public"],
+    deps = [
+        "@com_github_pkg_errors//:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "index_test.go",
+        "packageregistry_test.go",
+    ],
+    data = glob(["testdata/**"]),
+    embed = [":go_default_library"],
+    deps = ["//testing/require:go_default_library"],
+)

tools/genception/driver/bazel_json_builder.go

@@ -0,0 +1,156 @@
+// Copyright 2021 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package driver
+
+import (
+	"os"
+	"strings"
+)
+
+var RulesGoStdlibLabel = "@io_bazel_rules_go//:stdlib"
+
+/*
+type BazelJSONBuilder struct {
+	packagesBaseDir string
+	includeTests    bool
+}
+
+
+var _defaultKinds = []string{"go_library", "go_test", "go_binary"}
+
+var externalRe = regexp.MustCompile(`.*\/external\/([^\/]+)(\/(.*))?\/([^\/]+.go)`)
+
+func (b *BazelJSONBuilder) fileQuery(filename string) string {
+	label := filename
+
+	if strings.HasPrefix(filename, "./") {
+		label = strings.TrimPrefix(filename, "./")
+	}
+
+	if matches := externalRe.FindStringSubmatch(filename); len(matches) == 5 {
+		// if filepath is for a third party lib, we need to know, what external
+		// library this file is part of.
+		matches = append(matches[:2], matches[3:]...)
+		label = fmt.Sprintf("@%s//%s", matches[1], strings.Join(matches[2:], ":"))
+	}
+
+	relToBin, err := filepath.Rel(b.bazel.info["output_path"], filename)
+	if err == nil && !strings.HasPrefix(relToBin, "../") {
+		parts := strings.SplitN(relToBin, string(filepath.Separator), 3)
+		relToBin = parts[2]
+		// We've effectively converted filename from bazel-bin/some/path.go to some/path.go;
+		// Check if a BUILD.bazel files exists under this dir, if not walk up and repeat.
+		relToBin = filepath.Dir(relToBin)
+		_, err = os.Stat(filepath.Join(b.bazel.WorkspaceRoot(), relToBin, "BUILD.bazel"))
+		for errors.Is(err, os.ErrNotExist) && relToBin != "." {
+			relToBin = filepath.Dir(relToBin)
+			_, err = os.Stat(filepath.Join(b.bazel.WorkspaceRoot(), relToBin, "BUILD.bazel"))
+		}
+
+		if err == nil {
+			// return package path found and build all targets (codegen doesn't fall under go_library)
+			// Otherwise fallback to default
+			if relToBin == "." {
+				relToBin = ""
+			}
+			label = fmt.Sprintf("//%s:all", relToBin)
+		}
+	}
+
+	return label
+}
+
+func isLocalImport(path string) bool {
+	return path == "." || path == ".." ||
+		strings.HasPrefix(path, "./") || strings.HasPrefix(path, "../") ||
+		filepath.IsAbs(path)
+}
+
+func NewBazelJSONBuilder(includeTests bool) (*BazelJSONBuilder, error) {
+	return &BazelJSONBuilder{
+		includeTests:    includeTests,
+	}, nil
+}
+
+func (b *BazelJSONBuilder) Labels(ctx context.Context, requests []string) ([]string, error) {
+	ret := make([]string, 0, len(requests))
+	for _, request := range requests {
+		result := ""
+		if strings.HasSuffix(request, ".go") {
+			f := strings.TrimPrefix(request, "file=")
+			result = b.fileQuery(f)
+		} else if request == "builtin" || request == "std" {
+			result = fmt.Sprintf(RulesGoStdlibLabel)
+		}
+
+		if result != "" {
+			ret = append(ret, result)
+		}
+	}
+	if len(ret) == 0 {
+		return []string{RulesGoStdlibLabel}, nil
+	}
+	return ret, nil
+}
+
+func (b *BazelJSONBuilder) PathResolver() PathResolverFunc {
+	return func(p string) string {
+		p = strings.Replace(p, "__BAZEL_EXECROOT__", os.Getenv("PWD"), 1)
+		p = strings.Replace(p, "__BAZEL_OUTPUT_BASE__", b.packagesBaseDir, 1)
+		return p
+	}
+}
+*/
+
+func NewPathResolver() (*PathResolver, error) {
+	outBase, err := PackagesBaseFromEnv()
+	if err != nil {
+		return nil, err
+	}
+	return &PathResolver{
+		execRoot:   os.Getenv("PWD"),
+		outputBase: outBase,
+	}, nil
+}
+
+type PathResolver struct {
+	outputBase string
+	execRoot   string
+}
+
+const (
+	prefixExecRoot   = "__BAZEL_EXECROOT__"
+	prefixOutputBase = "__BAZEL_OUTPUT_BASE__"
+	prefixWorkspace  = "__BAZEL_WORKSPACE__"
+)
+
+var prefixes = []string{prefixExecRoot, prefixOutputBase, prefixWorkspace}
+
+func (r PathResolver) Resolve(path string) string {
+	for _, prefix := range prefixes {
+		if strings.HasPrefix(path, prefix) {
+			for _, rpl := range []string{r.execRoot, r.outputBase} {
+				rp := strings.Replace(path, prefix, rpl, 1)
+				_, err := os.Stat(rp)
+				if err == nil {
+					return rp
+				}
+			}
+			return path
+		}
+	}
+	log.WithField("path", path).Warn("unrecognized path prefix when resolving source paths in json import metadata")
+	return path
+}

tools/genception/driver/build_context.go

@@ -0,0 +1,44 @@
+package driver
+
+import (
+	"go/build"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+var buildContext = makeBuildContext()
+
+func makeBuildContext() *build.Context {
+	bctx := build.Default
+	bctx.BuildTags = strings.Split(getenvDefault("GOTAGS", ""), ",")
+
+	return &bctx
+}
+
+func filterSourceFilesForTags(files []string) []string {
+	ret := make([]string, 0, len(files))
+
+	for _, f := range files {
+		dir, filename := filepath.Split(f)
+		ext := filepath.Ext(f)
+
+		match, err := buildContext.MatchFile(dir, filename)
+		if err != nil {
+			log.WithError(err).WithField("file", f).Warn("error matching file")
+		}
+		// MatchFile filters out anything without a file extension. In the
+		// case of CompiledGoFiles (in particular gco processed files from
+		// the cache), we want them.
+		if match || ext == "" {
+			ret = append(ret, f)
+		}
+	}
+	return ret
+}
+func getenvDefault(key, defaultValue string) string {
+	if v, ok := os.LookupEnv(key); ok {
+		return v
+	}
+	return defaultValue
+}

tools/genception/driver/driver_request.go

@@ -0,0 +1,91 @@
+// Copyright 2021 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package driver
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+)
+
+// From https://pkg.go.dev/golang.org/x/tools/go/packages#LoadMode
+type LoadMode int
+
+// Only NeedExportsFile is needed in our case
+const (
+	// NeedName adds Name and PkgPath.
+	NeedName LoadMode = 1 << iota
+
+	// NeedFiles adds GoFiles and OtherFiles.
+	NeedFiles
+
+	// NeedCompiledGoFiles adds CompiledGoFiles.
+	NeedCompiledGoFiles
+
+	// NeedImports adds Imports. If NeedDeps is not set, the Imports field will contain
+	// "placeholder" Packages with only the ID set.
+	NeedImports
+
+	// NeedDeps adds the fields requested by the LoadMode in the packages in Imports.
+	NeedDeps
+
+	// NeedExportsFile adds ExportFile.
+	NeedExportFile
+
+	// NeedTypes adds Types, Fset, and IllTyped.
+	NeedTypes
+
+	// NeedSyntax adds Syntax.
+	NeedSyntax
+
+	// NeedTypesInfo adds TypesInfo.
+	NeedTypesInfo
+
+	// NeedTypesSizes adds TypesSizes.
+	NeedTypesSizes
+
+	// typecheckCgo enables full support for type checking cgo. Requires Go 1.15+.
+	// Modifies CompiledGoFiles and Types, and has no effect on its own.
+	typecheckCgo
+
+	// NeedModule adds Module.
+	NeedModule
+)
+
+// Deprecated: NeedExportsFile is a historical misspelling of NeedExportFile.
+const NeedExportsFile = NeedExportFile
+
+// From https://github.com/golang/tools/blob/v0.1.0/go/packages/external.go#L32
+// Most fields are disabled since there is no need for them
+type DriverRequest struct {
+	Mode LoadMode `json:"mode"`
+	// Env specifies the environment the underlying build system should be run in.
+	// Env []string `json:"env"`
+	// BuildFlags are flags that should be passed to the underlying build system.
+	// BuildFlags []string `json:"build_flags"`
+	// Tests specifies whether the patterns should also return test packages.
+	Tests bool `json:"tests"`
+	// Overlay maps file paths (relative to the driver's working directory) to the byte contents
+	// of overlay files.
+	// Overlay map[string][]byte `json:"overlay"`
+}
+
+func ReadDriverRequest(r io.Reader) (*DriverRequest, error) {
+	req := &DriverRequest{}
+	if err := json.NewDecoder(r).Decode(&req); err != nil {
+		return nil, fmt.Errorf("unable to decode driver request: %w", err)
+	}
+	return req, nil
+}

tools/genception/driver/flatpackage.go

@@ -0,0 +1,217 @@
+// Copyright 2021 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package driver
+
+import (
+	"encoding/json"
+	"fmt"
+	"go/parser"
+	"go/token"
+	"os"
+	"strconv"
+	"strings"
+)
+
+type ResolvePkgFunc func(importPath string) string
+
+// Copy and pasted from golang.org/x/tools/go/packages
+type FlatPackagesError struct {
+	Pos  string // "file:line:col" or "file:line" or "" or "-"
+	Msg  string
+	Kind FlatPackagesErrorKind
+}
+
+type FlatPackagesErrorKind int
+
+const (
+	UnknownError FlatPackagesErrorKind = iota
+	ListError
+	ParseError
+	TypeError
+)
+
+func (err FlatPackagesError) Error() string {
+	pos := err.Pos
+	if pos == "" {
+		pos = "-" // like token.Position{}.String()
+	}
+	return pos + ": " + err.Msg
+}
+
+// FlatPackage is the JSON form of Package
+// It drops all the type and syntax fields, and transforms the Imports
+type FlatPackage struct {
+	ID              string
+	Name            string              `json:",omitempty"`
+	PkgPath         string              `json:",omitempty"`
+	Errors          []FlatPackagesError `json:",omitempty"`
+	GoFiles         []string            `json:",omitempty"`
+	CompiledGoFiles []string            `json:",omitempty"`
+	OtherFiles      []string            `json:",omitempty"`
+	ExportFile      string              `json:",omitempty"`
+	Imports         map[string]string   `json:",omitempty"`
+	Standard        bool                `json:",omitempty"`
+}
+
+type (
+	PackageFunc      func(pkg *FlatPackage)
+	PathResolverFunc func(path string) string
+)
+
+func resolvePathsInPlace(prf PathResolverFunc, paths []string) {
+	for i, path := range paths {
+		paths[i] = prf(path)
+	}
+}
+
+func WalkFlatPackagesFromJSON(jsonFile string, onPkg PackageFunc) error {
+	f, err := os.Open(jsonFile)
+	if err != nil {
+		return fmt.Errorf("unable to open package JSON file: %w", err)
+	}
+	defer func() {
+		if err := f.Close(); err != nil {
+			log.WithError(err).WithField("file", f.Name()).Error("unable to close file")
+		}
+	}()
+
+	decoder := json.NewDecoder(f)
+	for decoder.More() {
+		pkg := &FlatPackage{}
+		if err := decoder.Decode(&pkg); err != nil {
+			return fmt.Errorf("unable to decode package in %s: %w", f.Name(), err)
+		}
+
+		onPkg(pkg)
+	}
+	return nil
+}
+
+func (fp *FlatPackage) ResolvePaths(prf PathResolverFunc) {
+	resolvePathsInPlace(prf, fp.CompiledGoFiles)
+	resolvePathsInPlace(prf, fp.GoFiles)
+	resolvePathsInPlace(prf, fp.OtherFiles)
+	fp.ExportFile = prf(fp.ExportFile)
+}
+
+// FilterFilesForBuildTags filters the source files given the current build
+// tags.
+func (fp *FlatPackage) FilterFilesForBuildTags() {
+	fp.GoFiles = filterSourceFilesForTags(fp.GoFiles)
+	fp.CompiledGoFiles = filterSourceFilesForTags(fp.CompiledGoFiles)
+}
+
+func (fp *FlatPackage) filterTestSuffix(files []string) (err error, testFiles []string, xTestFiles, nonTestFiles []string) {
+	for _, filename := range files {
+		if strings.HasSuffix(filename, "_test.go") {
+			fset := token.NewFileSet()
+			f, err := parser.ParseFile(fset, filename, nil, parser.PackageClauseOnly)
+			if err != nil {
+				return err, nil, nil, nil
+			}
+			if f.Name.Name == fp.Name {
+				testFiles = append(testFiles, filename)
+			} else {
+				xTestFiles = append(xTestFiles, filename)
+			}
+		} else {
+			nonTestFiles = append(nonTestFiles, filename)
+		}
+	}
+	return
+}
+
+func (fp *FlatPackage) MoveTestFiles() *FlatPackage {
+	err, tgf, xtgf, gf := fp.filterTestSuffix(fp.GoFiles)
+
+	if err != nil {
+		return nil
+	}
+	fp.GoFiles = append(gf, tgf...)
+	fp.CompiledGoFiles = append(gf, tgf...)
+
+	if len(xtgf) == 0 {
+		return nil
+	}
+
+	newImports := make(map[string]string, len(fp.Imports))
+	for k, v := range fp.Imports {
+		newImports[k] = v
+	}
+
+	newImports[fp.PkgPath] = fp.ID
+
+	// Clone package, only xtgf files
+	return &FlatPackage{
+		ID:              fp.ID + "_xtest",
+		Name:            fp.Name + "_test",
+		PkgPath:         fp.PkgPath + "_test",
+		Imports:         newImports,
+		Errors:          fp.Errors,
+		GoFiles:         append([]string{}, xtgf...),
+		CompiledGoFiles: append([]string{}, xtgf...),
+		OtherFiles:      fp.OtherFiles,
+		ExportFile:      fp.ExportFile,
+		Standard:        fp.Standard,
+	}
+}
+
+func (fp *FlatPackage) IsStdlib() bool {
+	return fp.Standard
+}
+
+func (fp *FlatPackage) ResolveImports(resolve ResolvePkgFunc) error {
+	// Stdlib packages are already complete import wise
+	if fp.IsStdlib() {
+		return nil
+	}
+
+	fset := token.NewFileSet()
+
+	for _, file := range fp.CompiledGoFiles {
+		f, err := parser.ParseFile(fset, file, nil, parser.ImportsOnly)
+		if err != nil {
+			return err
+		}
+		// If the name is not provided, fetch it from the sources
+		if fp.Name == "" {
+			fp.Name = f.Name.Name
+		}
+
+		for _, rawImport := range f.Imports {
+			imp, err := strconv.Unquote(rawImport.Path.Value)
+			if err != nil {
+				continue
+			}
+			// We don't handle CGo for now
+			if imp == "C" {
+				continue
+			}
+			if _, ok := fp.Imports[imp]; ok {
+				continue
+			}
+
+			if pkgID := resolve(imp); pkgID != "" {
+				fp.Imports[imp] = pkgID
+			}
+		}
+	}
+
+	return nil
+}
+
+func (fp *FlatPackage) IsRoot() bool {
+	return strings.HasPrefix(fp.ID, "//")
+}