Separate type for unaggregated network attestations (#14659)

* definitions and gossip

* validator

* broadcast

* broadcast the correct att depending on version

* small updates

* don't check bits after Electra

* nitpick

* tests

* changelog <3

* review

* more review

* review yet again

* try a different design

* fix gossip issues

* cleanup

* tests

* reduce cognitive complexity

* Preston's review

* move changelog entry to unreleased section

* fix pending atts pool issues

* reviews

* Potuz's comments

* test fixes

CHANGELOG.md

@@ -21,6 +21,7 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - DB optimization for saving light client bootstraps (save unique sync committees only).
 - Trace IDONTWANT Messages in Pubsub.
 - Add Fulu fork boilerplate.
+- Separate type for unaggregated network attestations. [PR](https://github.com/prysmaticlabs/prysm/pull/14659)
 
 ### Changed
 

api/server/structs/conversions.go

@@ -432,6 +432,32 @@ func (a *AttestationElectra) ToConsensus() (*eth.AttestationElectra, error) {
 	}, nil
 }
 
+func (a *SingleAttestation) ToConsensus() (*eth.SingleAttestation, error) {
+	ci, err := strconv.ParseUint(a.CommitteeIndex, 10, 64)
+	if err != nil {
+		return nil, server.NewDecodeError(err, "CommitteeIndex")
+	}
+	ai, err := strconv.ParseUint(a.AttesterIndex, 10, 64)
+	if err != nil {
+		return nil, server.NewDecodeError(err, "AttesterIndex")
+	}
+	data, err := a.Data.ToConsensus()
+	if err != nil {
+		return nil, server.NewDecodeError(err, "Data")
+	}
+	sig, err := bytesutil.DecodeHexWithLength(a.Signature, fieldparams.BLSSignatureLength)
+	if err != nil {
+		return nil, server.NewDecodeError(err, "Signature")
+	}
+
+	return &eth.SingleAttestation{
+		CommitteeId:   primitives.CommitteeIndex(ci),
+		AttesterIndex: primitives.ValidatorIndex(ai),
+		Data:          data,
+		Signature:     sig,
+	}, nil
+}
+
 func AttElectraFromConsensus(a *eth.AttestationElectra) *AttestationElectra {
 	return &AttestationElectra{
 		AggregationBits: hexutil.Encode(a.AggregationBits),

api/server/structs/other.go

@@ -36,6 +36,13 @@ type AttestationElectra struct {
 	CommitteeBits   string           `json:"committee_bits"`
 }
 
+type SingleAttestation struct {
+	CommitteeIndex string           `json:"committee_index"`
+	AttesterIndex  string           `json:"attester_index"`
+	Data           *AttestationData `json:"data"`
+	Signature      string           `json:"signature"`
+}
+
 type AttestationData struct {
 	Slot            string      `json:"slot"`
 	CommitteeIndex  string      `json:"index"`

beacon-chain/core/helpers/attestation.go

@@ -32,6 +32,9 @@ func ValidateNilAttestation(attestation ethpb.Att) error {
 	if attestation.GetData().Target == nil {
 		return errors.New("attestation's target can't be nil")
 	}
+	if attestation.IsSingle() {
+		return nil
+	}
 	if attestation.GetAggregationBits() == nil {
 		return errors.New("attestation's bitfield can't be nil")
 	}

beacon-chain/core/helpers/attestation_test.go

@@ -308,6 +308,16 @@ func TestValidateNilAttestation(t *testing.T) {
 			},
 			errString: "",
 		},
+		{
+			name: "single attestation",
+			attestation: &ethpb.SingleAttestation{
+				Data: &ethpb.AttestationData{
+					Target: &ethpb.Checkpoint{},
+					Source: &ethpb.Checkpoint{},
+				},
+			},
+			errString: "",
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

beacon-chain/core/helpers/beacon_committee_test.go

@@ -97,6 +97,13 @@ func TestVerifyBitfieldLength_OK(t *testing.T) {
 	assert.NoError(t, helpers.VerifyBitfieldLength(bf, committeeSize), "Bitfield is not validated when it was supposed to be")
 }
 
+func TestVerifyBitfieldLength_Incorrect(t *testing.T) {
+	helpers.ClearCache()
+
+	bf := bitfield.NewBitlist(1)
+	require.ErrorContains(t, "wanted participants bitfield length 2, got: 1", helpers.VerifyBitfieldLength(bf, 2))
+}
+
 func TestCommitteeAssignments_CannotRetrieveFutureEpoch(t *testing.T) {
 	helpers.ClearCache()
 

beacon-chain/p2p/gossip_topic_mappings.go

@@ -50,7 +50,7 @@ func GossipTopicMappings(topic string, epoch primitives.Epoch) proto.Message {
 		return gossipMessage(topic)
 	case AttestationSubnetTopicFormat:
 		if epoch >= params.BeaconConfig().ElectraForkEpoch {
-			return &ethpb.AttestationElectra{}
+			return &ethpb.SingleAttestation{}
 		}
 		return gossipMessage(topic)
 	case AttesterSlashingSubnetTopicFormat:
@@ -109,7 +109,7 @@ func init() {
 
 	// Specially handle Electra objects.
 	GossipTypeMapping[reflect.TypeOf(&ethpb.SignedBeaconBlockElectra{})] = BlockSubnetTopicFormat
-	GossipTypeMapping[reflect.TypeOf(&ethpb.AttestationElectra{})] = AttestationSubnetTopicFormat
+	GossipTypeMapping[reflect.TypeOf(&ethpb.SingleAttestation{})] = AttestationSubnetTopicFormat
 	GossipTypeMapping[reflect.TypeOf(&ethpb.AttesterSlashingElectra{})] = AttesterSlashingSubnetTopicFormat
 	GossipTypeMapping[reflect.TypeOf(&ethpb.SignedAggregateAttestationAndProofElectra{})] = AggregateAndProofSubnetTopicFormat
 

beacon-chain/p2p/gossip_topic_mappings_test.go

@@ -121,7 +121,7 @@ func TestGossipTopicMappings_CorrectType(t *testing.T) {
 	_, ok = pMessage.(*ethpb.SignedBeaconBlockElectra)
 	assert.Equal(t, true, ok)
 	pMessage = GossipTopicMappings(AttestationSubnetTopicFormat, electraForkEpoch)
-	_, ok = pMessage.(*ethpb.AttestationElectra)
+	_, ok = pMessage.(*ethpb.SingleAttestation)
 	assert.Equal(t, true, ok)
 	pMessage = GossipTopicMappings(AttesterSlashingSubnetTopicFormat, electraForkEpoch)
 	_, ok = pMessage.(*ethpb.AttesterSlashingElectra)

beacon-chain/p2p/types/object_mapping.go

@@ -120,7 +120,7 @@ func InitializeDataMaps() {
 			return &ethpb.Attestation{}, nil
 		},
 		bytesutil.ToBytes4(params.BeaconConfig().ElectraForkVersion): func() (ethpb.Att, error) {
-			return &ethpb.AttestationElectra{}, nil
+			return &ethpb.SingleAttestation{}, nil
 		},
 		bytesutil.ToBytes4(params.BeaconConfig().FuluForkVersion): func() (ethpb.Att, error) {
 			return &ethpb.AttestationElectra{}, nil

beacon-chain/rpc/endpoints.go

@@ -532,6 +532,7 @@ func (s *Service) beaconEndpoints(
 		FinalizationFetcher:     s.cfg.FinalizationFetcher,
 		ForkchoiceFetcher:       s.cfg.ForkchoiceFetcher,
 		CoreService:             coreService,
+		AttestationStateFetcher: s.cfg.AttestationReceiver,
 	}
 
 	const namespace = "beacon"

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

@@ -285,8 +285,11 @@ func (s *Server) SubmitAttestationsV2(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-func (s *Server) handleAttestationsElectra(ctx context.Context, data json.RawMessage) (attFailures []*server.IndexedVerificationFailure, failedBroadcasts []string, err error) {
-	var sourceAttestations []*structs.AttestationElectra
+func (s *Server) handleAttestationsElectra(
+	ctx context.Context,
+	data json.RawMessage,
+) (attFailures []*server.IndexedVerificationFailure, failedBroadcasts []string, err error) {
+	var sourceAttestations []*structs.SingleAttestation
 
 	if err = json.Unmarshal(data, &sourceAttestations); err != nil {
 		return nil, nil, errors.Wrap(err, "failed to unmarshal attestation")
@@ -296,7 +299,7 @@ func (s *Server) handleAttestationsElectra(ctx context.Context, data json.RawMes
 		return nil, nil, errors.New("no data submitted")
 	}
 
-	var validAttestations []*eth.AttestationElectra
+	var validAttestations []*eth.SingleAttestation
 	for i, sourceAtt := range sourceAttestations {
 		att, err := sourceAtt.ToConsensus()
 		if err != nil {
@@ -316,18 +319,23 @@ func (s *Server) handleAttestationsElectra(ctx context.Context, data json.RawMes
 		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 !att.IsAggregated() {
-			s.OperationNotifier.OperationFeed().Send(&feed.Event{
-				Type: operation.UnaggregatedAttReceived,
-				Data: &operation.UnAggregatedAttReceivedData{
-					Attestation: att,
-				},
-			})
+	for i, singleAtt := range validAttestations {
+		targetState, err := s.AttestationStateFetcher.AttestationTargetState(ctx, singleAtt.Data.Target)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "could not get target state for attestation")
 		}
+		committee, err := corehelpers.BeaconCommitteeFromState(ctx, targetState, singleAtt.Data.Slot, singleAtt.CommitteeId)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "could not get committee for attestation")
+		}
+		att := singleAtt.ToAttestationElectra(committee)
+
+		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)
@@ -335,12 +343,8 @@ func (s *Server) handleAttestationsElectra(ctx context.Context, data json.RawMes
 			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 {
+		subnet := corehelpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), att.GetCommitteeIndex(), att.Data.Slot)
+		if err = s.Broadcaster.BroadcastAttestation(ctx, subnet, singleAtt); err != nil {
 			log.WithError(err).Errorf("could not broadcast attestation at index %d", i)
 			failedBroadcasts = append(failedBroadcasts, strconv.Itoa(i))
 			continue
@@ -350,13 +354,9 @@ func (s *Server) handleAttestationsElectra(ctx context.Context, data json.RawMes
 			if err = s.AttestationCache.Add(att); err != nil {
 				log.WithError(err).Error("could not save attestation")
 			}
-		} else if att.IsAggregated() {
-			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")
+				log.WithError(err).Error("could not save attestation")
 			}
 		}
 	}

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

@@ -498,13 +498,17 @@ func TestSubmitAttestations(t *testing.T) {
 	c.SlotsPerEpoch = 1
 	params.OverrideBeaconConfig(c)
 
-	_, keys, err := util.DeterministicDepositsAndKeys(1)
+	_, keys, err := util.DeterministicDepositsAndKeys(2)
 	require.NoError(t, err)
 	validators := []*ethpbv1alpha1.Validator{
 		{
 			PublicKey: keys[0].PublicKey().Marshal(),
 			ExitEpoch: params.BeaconConfig().FarFutureEpoch,
 		},
+		{
+			PublicKey: keys[1].PublicKey().Marshal(),
+			ExitEpoch: params.BeaconConfig().FarFutureEpoch,
+		},
 	}
 	bs, err := util.NewBeaconState(func(state *ethpbv1alpha1.BeaconState) error {
 		state.Validators = validators
@@ -521,9 +525,10 @@ func TestSubmitAttestations(t *testing.T) {
 
 	chainService := &blockchainmock.ChainService{State: bs}
 	s := &Server{
-		HeadFetcher:       chainService,
-		ChainInfoFetcher:  chainService,
-		OperationNotifier: &blockchainmock.MockOperationNotifier{},
+		HeadFetcher:             chainService,
+		ChainInfoFetcher:        chainService,
+		OperationNotifier:       &blockchainmock.MockOperationNotifier{},
+		AttestationStateFetcher: chainService,
 	}
 	t.Run("V1", func(t *testing.T) {
 		t.Run("single", func(t *testing.T) {
@@ -732,7 +737,7 @@ func TestSubmitAttestations(t *testing.T) {
 				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, primitives.ValidatorIndex(1), broadcaster.BroadcastAttestations[0].GetAttestingIndex())
 				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)
@@ -2344,8 +2349,8 @@ var (
 ]`
 	singleAttElectra = `[
   {
-    "aggregation_bits": "0x03",
-	"committee_bits": "0x0100000000000000",
+    "committee_index": "0",
+	"attester_index": "1",
     "signature": "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15",
     "data": {
       "slot": "0",
@@ -2364,8 +2369,8 @@ var (
 ]`
 	multipleAttsElectra = `[
   {
-    "aggregation_bits": "0x03",
-	"committee_bits": "0x0100000000000000",
+    "committee_index": "0",
+	"attester_index": "0",
     "signature": "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15",
     "data": {
       "slot": "0",
@@ -2382,8 +2387,8 @@ var (
     }
   },
   {
-    "aggregation_bits": "0x03",
-	"committee_bits": "0x0100000000000000",
+    "committee_index": "0",
+	"attester_index": "1",
     "signature": "0x8146f4397bfd8fd057ebbcd6a67327bdc7ed5fb650533edcb6377b650dea0b6da64c14ecd60846d5c0a0cd43893d6972092500f82c9d8a955e2b58c5ed3cbe885d84008ace6bd86ba9e23652f58e2ec207cec494c916063257abf285b9b15b15",
     "data": {
       "slot": "0",
@@ -2403,8 +2408,8 @@ var (
 	// signature is invalid
 	invalidAttElectra = `[
   {
-    "aggregation_bits": "0x03",
-	"committee_bits": "0x0100000000000000",
+    "committee_index": "0",
+	"attester_index": "0",
 	"signature": "0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
     "data": {
       "slot": "0",

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

@@ -50,4 +50,5 @@ type Server struct {
 	BLSChangesPool          blstoexec.PoolManager
 	ForkchoiceFetcher       blockchain.ForkchoiceFetcher
 	CoreService             *core.Service
+	AttestationStateFetcher blockchain.AttestationStateFetcher
 }

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

@@ -198,35 +198,20 @@ func matchingAtts(atts []ethpbalpha.Att, slot primitives.Slot, attDataRoot []byt
 			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) {
+			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 {
-			if att.Version() >= version.Electra {
-				ci, err := att.GetCommitteeIndex()
-				if err != nil {
-					return nil, err
-				}
-				if ci != index {
-					continue
-				}
-			} else {
-				continue
-			}
-		} else {
-			// If postElectra is false and att.Version >= version.Electra, ignore the attestation.
-			if att.Version() >= version.Electra {
-				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) {
+		if (!postElectra && att.Version() < version.Electra) || (postElectra && att.Version() >= version.Electra && att.GetCommitteeIndex() == index) {
 			result = append(result, att)
 		}
 	}

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

@@ -13,6 +13,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
 	ethpb "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/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -45,7 +46,7 @@ func (vs *Server) ProposeAttestation(ctx context.Context, att *ethpb.Attestation
 	ctx, span := trace.StartSpan(ctx, "AttesterServer.ProposeAttestation")
 	defer span.End()
 
-	resp, err := vs.proposeAtt(ctx, att, att.GetData().CommitteeIndex)
+	resp, err := vs.proposeAtt(ctx, att, nil, att.GetData().CommitteeIndex)
 	if err != nil {
 		return nil, err
 	}
@@ -69,20 +70,27 @@ func (vs *Server) ProposeAttestation(ctx context.Context, att *ethpb.Attestation
 
 // ProposeAttestationElectra is a function called by an attester to vote
 // on a block via an attestation object as defined in the Ethereum specification.
-func (vs *Server) ProposeAttestationElectra(ctx context.Context, att *ethpb.AttestationElectra) (*ethpb.AttestResponse, error) {
+func (vs *Server) ProposeAttestationElectra(ctx context.Context, singleAtt *ethpb.SingleAttestation) (*ethpb.AttestResponse, error) {
 	ctx, span := trace.StartSpan(ctx, "AttesterServer.ProposeAttestationElectra")
 	defer span.End()
 
-	committeeIndex, err := att.GetCommitteeIndex()
-	if err != nil {
-		return nil, err
-	}
-
-	resp, err := vs.proposeAtt(ctx, att, committeeIndex)
+	targetState, err := vs.AttestationStateFetcher.AttestationTargetState(ctx, singleAtt.Data.Target)
+	if err != nil {
+		return nil, status.Error(codes.Internal, "Could not get target state")
+	}
+	committeeIndex := singleAtt.GetCommitteeIndex()
+	committee, err := helpers.BeaconCommitteeFromState(ctx, targetState, singleAtt.Data.Slot, committeeIndex)
+	if err != nil {
+		return nil, status.Error(codes.Internal, "Could not get committee")
+	}
+
+	resp, err := vs.proposeAtt(ctx, singleAtt, committee, committeeIndex)
 	if err != nil {
 		return nil, err
 	}
 
+	singleAttCopy := singleAtt.Copy()
+	att := singleAttCopy.ToAttestationElectra(committee)
 	if features.Get().EnableExperimentalAttestationPool {
 		if err = vs.AttestationCache.Add(att); err != nil {
 			log.WithError(err).Error("Could not save attestation")
@@ -90,8 +98,7 @@ func (vs *Server) ProposeAttestationElectra(ctx context.Context, att *ethpb.Atte
 	} else {
 		go func() {
 			ctx = trace.NewContext(context.Background(), trace.FromContext(ctx))
-			attCopy := att.Copy()
-			if err := vs.AttPool.SaveUnaggregatedAttestation(attCopy); err != nil {
+			if err := vs.AttPool.SaveUnaggregatedAttestation(att); err != nil {
 				log.WithError(err).Error("Could not save unaggregated attestation")
 				return
 			}
@@ -149,14 +156,29 @@ func (vs *Server) SubscribeCommitteeSubnets(ctx context.Context, req *ethpb.Comm
 	return &emptypb.Empty{}, nil
 }
 
-func (vs *Server) proposeAtt(ctx context.Context, att ethpb.Att, committee primitives.CommitteeIndex) (*ethpb.AttestResponse, error) {
+func (vs *Server) proposeAtt(
+	ctx context.Context,
+	att ethpb.Att,
+	committee []primitives.ValidatorIndex, // required post-Electra
+	committeeIndex primitives.CommitteeIndex,
+) (*ethpb.AttestResponse, error) {
 	if _, err := bls.SignatureFromBytes(att.GetSignature()); err != nil {
 		return nil, status.Error(codes.InvalidArgument, "Incorrect attestation signature")
 	}
 
 	root, err := att.GetData().HashTreeRoot()
 	if err != nil {
-		return nil, status.Errorf(codes.Internal, "Could not tree hash attestation: %v", err)
+		return nil, status.Errorf(codes.Internal, "Could not get attestation root: %v", err)
+	}
+
+	var singleAtt *ethpb.SingleAttestation
+	if att.Version() >= version.Electra {
+		var ok bool
+		singleAtt, ok = att.(*ethpb.SingleAttestation)
+		if !ok {
+			return nil, status.Errorf(codes.Internal, "Attestation has wrong type (expected %T, got %T)", &ethpb.SingleAttestation{}, att)
+		}
+		att = singleAtt.ToAttestationElectra(committee)
 	}
 
 	// Broadcast the unaggregated attestation on a feed to notify other services in the beacon node
@@ -174,10 +196,16 @@ func (vs *Server) proposeAtt(ctx context.Context, att ethpb.Att, committee primi
 	if err != nil {
 		return nil, err
 	}
-	subnet := helpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), committee, att.GetData().Slot)
+	subnet := helpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), committeeIndex, att.GetData().Slot)
 
 	// Broadcast the new attestation to the network.
-	if err := vs.P2P.BroadcastAttestation(ctx, subnet, att); err != nil {
+	var attToBroadcast ethpb.Att
+	if singleAtt != nil {
+		attToBroadcast = singleAtt
+	} else {
+		attToBroadcast = att
+	}
+	if err := vs.P2P.BroadcastAttestation(ctx, subnet, attToBroadcast); err != nil {
 		return nil, status.Errorf(codes.Internal, "Could not broadcast attestation: %v", err)
 	}
 

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

@@ -31,11 +31,13 @@ import (
 )
 
 func TestProposeAttestation(t *testing.T) {
+	chainService := &mock.ChainService{}
 	attesterServer := &Server{
-		HeadFetcher:       &mock.ChainService{},
-		P2P:               &mockp2p.MockBroadcaster{},
-		AttPool:           attestations.NewPool(),
-		OperationNotifier: (&mock.ChainService{}).OperationNotifier(),
+		HeadFetcher:             chainService,
+		P2P:                     &mockp2p.MockBroadcaster{},
+		AttPool:                 attestations.NewPool(),
+		OperationNotifier:       (&mock.ChainService{}).OperationNotifier(),
+		AttestationStateFetcher: chainService,
 	}
 	head := util.NewBeaconBlock()
 	head.Block.Slot = 999
@@ -79,81 +81,19 @@ func TestProposeAttestation(t *testing.T) {
 		require.NoError(t, err)
 		require.NoError(t, state.SetSlot(params.BeaconConfig().SlotsPerEpoch+1))
 		require.NoError(t, state.SetValidators(validators))
+		chainService.State = state
 
-		cb := primitives.NewAttestationCommitteeBits()
-		cb.SetBitAt(0, true)
-		req := &ethpb.AttestationElectra{
+		req := &ethpb.SingleAttestation{
 			Signature: sig.Marshal(),
 			Data: &ethpb.AttestationData{
 				BeaconBlockRoot: root[:],
 				Source:          &ethpb.Checkpoint{Root: make([]byte, 32)},
 				Target:          &ethpb.Checkpoint{Root: make([]byte, 32)},
 			},
-			CommitteeBits: cb,
 		}
 		_, err = attesterServer.ProposeAttestationElectra(context.Background(), req)
 		assert.NoError(t, err)
 	})
-	t.Run("Electra - non-zero committee index", func(t *testing.T) {
-		state, err := util.NewBeaconStateElectra()
-		require.NoError(t, err)
-		require.NoError(t, state.SetSlot(params.BeaconConfig().SlotsPerEpoch+1))
-		require.NoError(t, state.SetValidators(validators))
-
-		cb := primitives.NewAttestationCommitteeBits()
-		cb.SetBitAt(0, true)
-		req := &ethpb.AttestationElectra{
-			Signature: sig.Marshal(),
-			Data: &ethpb.AttestationData{
-				BeaconBlockRoot: root[:],
-				Source:          &ethpb.Checkpoint{Root: make([]byte, 32)},
-				Target:          &ethpb.Checkpoint{Root: make([]byte, 32)},
-				CommitteeIndex:  1,
-			},
-			CommitteeBits: cb,
-		}
-		_, err = attesterServer.ProposeAttestationElectra(context.Background(), req)
-		assert.ErrorContains(t, "attestation data's committee index must be 0 but was 1", err)
-	})
-	t.Run("Electra - no committee bit set", func(t *testing.T) {
-		state, err := util.NewBeaconStateElectra()
-		require.NoError(t, err)
-		require.NoError(t, state.SetSlot(params.BeaconConfig().SlotsPerEpoch+1))
-		require.NoError(t, state.SetValidators(validators))
-
-		req := &ethpb.AttestationElectra{
-			Signature: sig.Marshal(),
-			Data: &ethpb.AttestationData{
-				BeaconBlockRoot: root[:],
-				Source:          &ethpb.Checkpoint{Root: make([]byte, 32)},
-				Target:          &ethpb.Checkpoint{Root: make([]byte, 32)},
-			},
-			CommitteeBits: primitives.NewAttestationCommitteeBits(),
-		}
-		_, err = attesterServer.ProposeAttestationElectra(context.Background(), req)
-		assert.ErrorContains(t, "exactly 1 committee index must be set but 0 were set", err)
-	})
-	t.Run("Electra - multiple committee bits set", func(t *testing.T) {
-		state, err := util.NewBeaconStateElectra()
-		require.NoError(t, err)
-		require.NoError(t, state.SetSlot(params.BeaconConfig().SlotsPerEpoch+1))
-		require.NoError(t, state.SetValidators(validators))
-
-		cb := primitives.NewAttestationCommitteeBits()
-		cb.SetBitAt(0, true)
-		cb.SetBitAt(1, true)
-		req := &ethpb.AttestationElectra{
-			Signature: sig.Marshal(),
-			Data: &ethpb.AttestationData{
-				BeaconBlockRoot: root[:],
-				Source:          &ethpb.Checkpoint{Root: make([]byte, 32)},
-				Target:          &ethpb.Checkpoint{Root: make([]byte, 32)},
-			},
-			CommitteeBits: cb,
-		}
-		_, err = attesterServer.ProposeAttestationElectra(context.Background(), req)
-		assert.ErrorContains(t, "exactly 1 committee index must be set but 2 were set", err)
-	})
 }
 
 func TestProposeAttestation_IncorrectSignature(t *testing.T) {

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

@@ -42,43 +42,44 @@ import (
 // and committees in which particular validators need to perform their responsibilities,
 // and more.
 type Server struct {
-	Ctx                    context.Context
-	PayloadIDCache         *cache.PayloadIDCache
-	TrackedValidatorsCache *cache.TrackedValidatorsCache
-	HeadFetcher            blockchain.HeadFetcher
-	ForkFetcher            blockchain.ForkFetcher
-	ForkchoiceFetcher      blockchain.ForkchoiceFetcher
-	GenesisFetcher         blockchain.GenesisFetcher
-	FinalizationFetcher    blockchain.FinalizationFetcher
-	TimeFetcher            blockchain.TimeFetcher
-	BlockFetcher           execution.POWBlockFetcher
-	DepositFetcher         cache.DepositFetcher
-	ChainStartFetcher      execution.ChainStartFetcher
-	Eth1InfoFetcher        execution.ChainInfoFetcher
-	OptimisticModeFetcher  blockchain.OptimisticModeFetcher
-	SyncChecker            sync.Checker
-	StateNotifier          statefeed.Notifier
-	BlockNotifier          blockfeed.Notifier
-	P2P                    p2p.Broadcaster
-	AttestationCache       *cache.AttestationCache
-	AttPool                attestations.Pool
-	SlashingsPool          slashings.PoolManager
-	ExitPool               voluntaryexits.PoolManager
-	SyncCommitteePool      synccommittee.Pool
-	BlockReceiver          blockchain.BlockReceiver
-	BlobReceiver           blockchain.BlobReceiver
-	MockEth1Votes          bool
-	Eth1BlockFetcher       execution.POWBlockFetcher
-	PendingDepositsFetcher depositsnapshot.PendingDepositsFetcher
-	OperationNotifier      opfeed.Notifier
-	StateGen               stategen.StateManager
-	ReplayerBuilder        stategen.ReplayerBuilder
-	BeaconDB               db.HeadAccessDatabase
-	ExecutionEngineCaller  execution.EngineCaller
-	BlockBuilder           builder.BlockBuilder
-	BLSChangesPool         blstoexec.PoolManager
-	ClockWaiter            startup.ClockWaiter
-	CoreService            *core.Service
+	Ctx                     context.Context
+	PayloadIDCache          *cache.PayloadIDCache
+	TrackedValidatorsCache  *cache.TrackedValidatorsCache
+	HeadFetcher             blockchain.HeadFetcher
+	ForkFetcher             blockchain.ForkFetcher
+	ForkchoiceFetcher       blockchain.ForkchoiceFetcher
+	GenesisFetcher          blockchain.GenesisFetcher
+	FinalizationFetcher     blockchain.FinalizationFetcher
+	TimeFetcher             blockchain.TimeFetcher
+	BlockFetcher            execution.POWBlockFetcher
+	DepositFetcher          cache.DepositFetcher
+	ChainStartFetcher       execution.ChainStartFetcher
+	Eth1InfoFetcher         execution.ChainInfoFetcher
+	OptimisticModeFetcher   blockchain.OptimisticModeFetcher
+	SyncChecker             sync.Checker
+	StateNotifier           statefeed.Notifier
+	BlockNotifier           blockfeed.Notifier
+	P2P                     p2p.Broadcaster
+	AttestationCache        *cache.AttestationCache
+	AttPool                 attestations.Pool
+	SlashingsPool           slashings.PoolManager
+	ExitPool                voluntaryexits.PoolManager
+	SyncCommitteePool       synccommittee.Pool
+	BlockReceiver           blockchain.BlockReceiver
+	BlobReceiver            blockchain.BlobReceiver
+	MockEth1Votes           bool
+	Eth1BlockFetcher        execution.POWBlockFetcher
+	PendingDepositsFetcher  depositsnapshot.PendingDepositsFetcher
+	OperationNotifier       opfeed.Notifier
+	StateGen                stategen.StateManager
+	ReplayerBuilder         stategen.ReplayerBuilder
+	BeaconDB                db.HeadAccessDatabase
+	ExecutionEngineCaller   execution.EngineCaller
+	BlockBuilder            builder.BlockBuilder
+	BLSChangesPool          blstoexec.PoolManager
+	ClockWaiter             startup.ClockWaiter
+	CoreService             *core.Service
+	AttestationStateFetcher blockchain.AttestationStateFetcher
 }
 
 // WaitForActivation checks if a validator public key exists in the active validator registry of the current

beacon-chain/rpc/service.go

@@ -212,43 +212,44 @@ func NewService(ctx context.Context, cfg *Config) *Service {
 		OptimisticModeFetcher: s.cfg.OptimisticModeFetcher,
 	}
 	validatorServer := &validatorv1alpha1.Server{
-		Ctx:                    s.ctx,
-		AttestationCache:       s.cfg.AttestationCache,
-		AttPool:                s.cfg.AttestationsPool,
-		ExitPool:               s.cfg.ExitPool,
-		HeadFetcher:            s.cfg.HeadFetcher,
-		ForkFetcher:            s.cfg.ForkFetcher,
-		ForkchoiceFetcher:      s.cfg.ForkchoiceFetcher,
-		GenesisFetcher:         s.cfg.GenesisFetcher,
-		FinalizationFetcher:    s.cfg.FinalizationFetcher,
-		TimeFetcher:            s.cfg.GenesisTimeFetcher,
-		BlockFetcher:           s.cfg.ExecutionChainService,
-		DepositFetcher:         s.cfg.DepositFetcher,
-		ChainStartFetcher:      s.cfg.ChainStartFetcher,
-		Eth1InfoFetcher:        s.cfg.ExecutionChainService,
-		OptimisticModeFetcher:  s.cfg.OptimisticModeFetcher,
-		SyncChecker:            s.cfg.SyncService,
-		StateNotifier:          s.cfg.StateNotifier,
-		BlockNotifier:          s.cfg.BlockNotifier,
-		OperationNotifier:      s.cfg.OperationNotifier,
-		P2P:                    s.cfg.Broadcaster,
-		BlockReceiver:          s.cfg.BlockReceiver,
-		BlobReceiver:           s.cfg.BlobReceiver,
-		MockEth1Votes:          s.cfg.MockEth1Votes,
-		Eth1BlockFetcher:       s.cfg.ExecutionChainService,
-		PendingDepositsFetcher: s.cfg.PendingDepositFetcher,
-		SlashingsPool:          s.cfg.SlashingsPool,
-		StateGen:               s.cfg.StateGen,
-		SyncCommitteePool:      s.cfg.SyncCommitteeObjectPool,
-		ReplayerBuilder:        ch,
-		ExecutionEngineCaller:  s.cfg.ExecutionEngineCaller,
-		BeaconDB:               s.cfg.BeaconDB,
-		BlockBuilder:           s.cfg.BlockBuilder,
-		BLSChangesPool:         s.cfg.BLSChangesPool,
-		ClockWaiter:            s.cfg.ClockWaiter,
-		CoreService:            coreService,
-		TrackedValidatorsCache: s.cfg.TrackedValidatorsCache,
-		PayloadIDCache:         s.cfg.PayloadIDCache,
+		Ctx:                     s.ctx,
+		AttestationCache:        s.cfg.AttestationCache,
+		AttPool:                 s.cfg.AttestationsPool,
+		ExitPool:                s.cfg.ExitPool,
+		HeadFetcher:             s.cfg.HeadFetcher,
+		ForkFetcher:             s.cfg.ForkFetcher,
+		ForkchoiceFetcher:       s.cfg.ForkchoiceFetcher,
+		GenesisFetcher:          s.cfg.GenesisFetcher,
+		FinalizationFetcher:     s.cfg.FinalizationFetcher,
+		TimeFetcher:             s.cfg.GenesisTimeFetcher,
+		BlockFetcher:            s.cfg.ExecutionChainService,
+		DepositFetcher:          s.cfg.DepositFetcher,
+		ChainStartFetcher:       s.cfg.ChainStartFetcher,
+		Eth1InfoFetcher:         s.cfg.ExecutionChainService,
+		OptimisticModeFetcher:   s.cfg.OptimisticModeFetcher,
+		SyncChecker:             s.cfg.SyncService,
+		StateNotifier:           s.cfg.StateNotifier,
+		BlockNotifier:           s.cfg.BlockNotifier,
+		OperationNotifier:       s.cfg.OperationNotifier,
+		P2P:                     s.cfg.Broadcaster,
+		BlockReceiver:           s.cfg.BlockReceiver,
+		BlobReceiver:            s.cfg.BlobReceiver,
+		MockEth1Votes:           s.cfg.MockEth1Votes,
+		Eth1BlockFetcher:        s.cfg.ExecutionChainService,
+		PendingDepositsFetcher:  s.cfg.PendingDepositFetcher,
+		SlashingsPool:           s.cfg.SlashingsPool,
+		StateGen:                s.cfg.StateGen,
+		SyncCommitteePool:       s.cfg.SyncCommitteeObjectPool,
+		ReplayerBuilder:         ch,
+		ExecutionEngineCaller:   s.cfg.ExecutionEngineCaller,
+		BeaconDB:                s.cfg.BeaconDB,
+		BlockBuilder:            s.cfg.BlockBuilder,
+		BLSChangesPool:          s.cfg.BLSChangesPool,
+		ClockWaiter:             s.cfg.ClockWaiter,
+		CoreService:             coreService,
+		TrackedValidatorsCache:  s.cfg.TrackedValidatorsCache,
+		PayloadIDCache:          s.cfg.PayloadIDCache,
+		AttestationStateFetcher: s.cfg.AttestationReceiver,
 	}
 	s.validatorServer = validatorServer
 	nodeServer := &nodev1alpha1.Server{

beacon-chain/sync/BUILD.bazel

@@ -44,7 +44,6 @@ go_library(
         "validate_aggregate_proof.go",
         "validate_attester_slashing.go",
         "validate_beacon_attestation.go",
-        "validate_beacon_attestation_electra.go",
         "validate_beacon_blocks.go",
         "validate_blob.go",
         "validate_bls_to_execution_change.go",
@@ -179,7 +178,6 @@ go_test(
         "sync_test.go",
         "validate_aggregate_proof_test.go",
         "validate_attester_slashing_test.go",
-        "validate_beacon_attestation_electra_test.go",
         "validate_beacon_attestation_test.go",
         "validate_beacon_blocks_test.go",
         "validate_blob_test.go",

beacon-chain/sync/decode_pubsub_test.go

@@ -276,7 +276,7 @@ func TestExtractDataType(t *testing.T) {
 				return wsb
 			}(),
 			wantMd:        wrapper.WrappedMetadataV1(&ethpb.MetaDataV1{}),
-			wantAtt:       &ethpb.AttestationElectra{},
+			wantAtt:       &ethpb.SingleAttestation{},
 			wantAggregate: &ethpb.SignedAggregateAttestationAndProofElectra{},
 			wantErr:       false,
 		},

beacon-chain/sync/pending_attestations_queue.go

@@ -91,85 +91,126 @@ func (s *Service) processPendingAtts(ctx context.Context) error {
 
 func (s *Service) processAttestations(ctx context.Context, attestations []ethpb.SignedAggregateAttAndProof) {
 	for _, signedAtt := range attestations {
-		aggregate := signedAtt.AggregateAttestationAndProof().AggregateVal()
-		data := aggregate.GetData()
+		att := signedAtt.AggregateAttestationAndProof().AggregateVal()
 		// The pending attestations can arrive in both aggregated and unaggregated forms,
 		// each from has distinct validation steps.
-		if aggregate.IsAggregated() {
-			// Save the pending aggregated attestation to the pool if it passes the aggregated
-			// validation steps.
-			valRes, err := s.validateAggregatedAtt(ctx, signedAtt)
-			if err != nil {
-				log.WithError(err).Debug("Pending aggregated attestation failed validation")
-			}
-			aggValid := pubsub.ValidationAccept == valRes
-			if s.validateBlockInAttestation(ctx, signedAtt) && aggValid {
-				if features.Get().EnableExperimentalAttestationPool {
-					if err = s.cfg.attestationCache.Add(aggregate); err != nil {
-						log.WithError(err).Debug("Could not save aggregate attestation")
-						continue
-					}
-				} else {
-					if err := s.cfg.attPool.SaveAggregatedAttestation(aggregate); err != nil {
-						log.WithError(err).Debug("Could not save aggregate attestation")
-						continue
-					}
-				}
+		if att.IsAggregated() {
+			s.processAggregated(ctx, signedAtt)
+		} else {
+			s.processUnaggregated(ctx, att)
+		}
+	}
+}
 
-				s.setAggregatorIndexEpochSeen(data.Target.Epoch, signedAtt.AggregateAttestationAndProof().GetAggregatorIndex())
+func (s *Service) processAggregated(ctx context.Context, att ethpb.SignedAggregateAttAndProof) {
+	aggregate := att.AggregateAttestationAndProof().AggregateVal()
 
-				// Broadcasting the signed attestation again once a node is able to process it.
-				if err := s.cfg.p2p.Broadcast(ctx, signedAtt); err != nil {
-					log.WithError(err).Debug("Could not broadcast")
-				}
+	// Save the pending aggregated attestation to the pool if it passes the aggregated
+	// validation steps.
+	valRes, err := s.validateAggregatedAtt(ctx, att)
+	if err != nil {
+		log.WithError(err).Debug("Pending aggregated attestation failed validation")
+	}
+	aggValid := pubsub.ValidationAccept == valRes
+	if s.validateBlockInAttestation(ctx, att) && aggValid {
+		if features.Get().EnableExperimentalAttestationPool {
+			if err = s.cfg.attestationCache.Add(aggregate); err != nil {
+				log.WithError(err).Debug("Could not save aggregate attestation")
+				return
 			}
 		} else {
-			// This is an important validation before retrieving attestation pre state to defend against
-			// attestation's target intentionally reference checkpoint that's long ago.
-			// Verify current finalized checkpoint is an ancestor of the block defined by the attestation's beacon block root.
-			if !s.cfg.chain.InForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot)) {
-				log.WithError(blockchain.ErrNotDescendantOfFinalized).Debug("Could not verify finalized consistency")
-				continue
-			}
-			if err := s.cfg.chain.VerifyLmdFfgConsistency(ctx, aggregate); err != nil {
-				log.WithError(err).Debug("Could not verify FFG consistency")
-				continue
-			}
-			preState, err := s.cfg.chain.AttestationTargetState(ctx, data.Target)
-			if err != nil {
-				log.WithError(err).Debug("Could not retrieve attestation prestate")
-				continue
+			if err := s.cfg.attPool.SaveAggregatedAttestation(aggregate); err != nil {
+				log.WithError(err).Debug("Could not save aggregate attestation")
+				return
 			}
+		}
 
-			valid, err := s.validateUnaggregatedAttWithState(ctx, aggregate, preState)
-			if err != nil {
-				log.WithError(err).Debug("Pending unaggregated attestation failed validation")
-				continue
-			}
-			if valid == pubsub.ValidationAccept {
-				if features.Get().EnableExperimentalAttestationPool {
-					if err = s.cfg.attestationCache.Add(aggregate); err != nil {
-						log.WithError(err).Debug("Could not save unaggregated attestation")
-						continue
-					}
-				} else {
-					if err := s.cfg.attPool.SaveUnaggregatedAttestation(aggregate); err != nil {
-						log.WithError(err).Debug("Could not save unaggregated attestation")
-						continue
-					}
-				}
-				s.setSeenCommitteeIndicesSlot(data.Slot, data.CommitteeIndex, aggregate.GetAggregationBits())
+		s.setAggregatorIndexEpochSeen(aggregate.GetData().Target.Epoch, att.AggregateAttestationAndProof().GetAggregatorIndex())
 
-				valCount, err := helpers.ActiveValidatorCount(ctx, preState, slots.ToEpoch(data.Slot))
-				if err != nil {
-					log.WithError(err).Debug("Could not retrieve active validator count")
-					continue
-				}
-				// Broadcasting the signed attestation again once a node is able to process it.
-				if err := s.cfg.p2p.BroadcastAttestation(ctx, helpers.ComputeSubnetForAttestation(valCount, aggregate), aggregate); err != nil {
-					log.WithError(err).Debug("Could not broadcast")
-				}
+		// Broadcasting the signed attestation again once a node is able to process it.
+		if err := s.cfg.p2p.Broadcast(ctx, att); err != nil {
+			log.WithError(err).Debug("Could not broadcast")
+		}
+	}
+}
+
+func (s *Service) processUnaggregated(ctx context.Context, att ethpb.Att) {
+	data := att.GetData()
+
+	// This is an important validation before retrieving attestation pre state to defend against
+	// attestation's target intentionally reference checkpoint that's long ago.
+	// Verify current finalized checkpoint is an ancestor of the block defined by the attestation's beacon block root.
+	if !s.cfg.chain.InForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot)) {
+		log.WithError(blockchain.ErrNotDescendantOfFinalized).Debug("Could not verify finalized consistency")
+		return
+	}
+	if err := s.cfg.chain.VerifyLmdFfgConsistency(ctx, att); err != nil {
+		log.WithError(err).Debug("Could not verify FFG consistency")
+		return
+	}
+	preState, err := s.cfg.chain.AttestationTargetState(ctx, data.Target)
+	if err != nil {
+		log.WithError(err).Debug("Could not retrieve attestation prestate")
+		return
+	}
+	committee, err := helpers.BeaconCommitteeFromState(ctx, preState, data.Slot, att.GetCommitteeIndex())
+	if err != nil {
+		log.WithError(err).Debug("Could not retrieve committee from state")
+		return
+	}
+	valid, err := validateAttesterData(ctx, att, committee)
+	if err != nil {
+		log.WithError(err).Debug("Could not validate attester data")
+		return
+	} else if valid != pubsub.ValidationAccept {
+		log.Debug("Attestation failed attester data validation")
+		return
+	}
+
+	var singleAtt *ethpb.SingleAttestation
+	if att.Version() >= version.Electra {
+		var ok bool
+		singleAtt, ok = att.(*ethpb.SingleAttestation)
+		if !ok {
+			log.Debugf("Attestation has wrong type (expected %T, got %T)", &ethpb.SingleAttestation{}, att)
+			return
+		}
+		att = singleAtt.ToAttestationElectra(committee)
+	}
+
+	valid, err = s.validateUnaggregatedAttWithState(ctx, att, preState)
+	if err != nil {
+		log.WithError(err).Debug("Pending unaggregated attestation failed validation")
+		return
+	}
+	if valid == pubsub.ValidationAccept {
+		if features.Get().EnableExperimentalAttestationPool {
+			if err = s.cfg.attestationCache.Add(att); err != nil {
+				log.WithError(err).Debug("Could not save unaggregated attestation")
+				return
 			}
+		} else {
+			if err := s.cfg.attPool.SaveUnaggregatedAttestation(att); err != nil {
+				log.WithError(err).Debug("Could not save unaggregated attestation")
+				return
+			}
+		}
+		s.setSeenCommitteeIndicesSlot(data.Slot, data.CommitteeIndex, att.GetAggregationBits())
+
+		valCount, err := helpers.ActiveValidatorCount(ctx, preState, slots.ToEpoch(data.Slot))
+		if err != nil {
+			log.WithError(err).Debug("Could not retrieve active validator count")
+			return
+		}
+		// Broadcasting the signed attestation again once a node is able to process it.
+		var attToBroadcast ethpb.Att
+		if singleAtt != nil {
+			attToBroadcast = singleAtt
+		} else {
+			attToBroadcast = att
+		}
+		if err := s.cfg.p2p.BroadcastAttestation(ctx, helpers.ComputeSubnetForAttestation(valCount, attToBroadcast), attToBroadcast); err != nil {
+			log.WithError(err).Debug("Could not broadcast")
 		}
 	}
 }
@@ -211,6 +252,10 @@ func (s *Service) savePendingAtt(att ethpb.SignedAggregateAttAndProof) {
 }
 
 func attsAreEqual(a, b ethpb.SignedAggregateAttAndProof) bool {
+	if a.Version() != b.Version() {
+		return false
+	}
+
 	if a.GetSignature() != nil {
 		return b.GetSignature() != nil && a.AggregateAttestationAndProof().GetAggregatorIndex() == b.AggregateAttestationAndProof().GetAggregatorIndex()
 	}
@@ -228,6 +273,12 @@ func attsAreEqual(a, b ethpb.SignedAggregateAttAndProof) bool {
 	}
 
 	if a.Version() >= version.Electra {
+		if aAggregate.IsSingle() != bAggregate.IsSingle() {
+			return false
+		}
+		if aAggregate.IsSingle() && aAggregate.GetAttestingIndex() != bAggregate.GetAttestingIndex() {
+			return false
+		}
 		if !bytes.Equal(aAggregate.CommitteeBitsVal().Bytes(), bAggregate.CommitteeBitsVal().Bytes()) {
 			return false
 		}

beacon-chain/sync/pending_attestations_queue_test.go

@@ -92,18 +92,9 @@ func TestProcessPendingAtts_HasBlockSaveUnAggregatedAtt(t *testing.T) {
 		att.Signature = privKeys[i].Sign(hashTreeRoot[:]).Marshal()
 	}
 
-	// Arbitrary aggregator index for testing purposes.
-	aggregatorIndex := committee[0]
-	sszUint := primitives.SSZUint64(att.Data.Slot)
-	sig, err := signing.ComputeDomainAndSign(beaconState, 0, &sszUint, params.BeaconConfig().DomainSelectionProof, privKeys[aggregatorIndex])
-	require.NoError(t, err)
 	aggregateAndProof := &ethpb.AggregateAttestationAndProof{
-		SelectionProof:  sig,
-		Aggregate:       att,
-		AggregatorIndex: aggregatorIndex,
+		Aggregate: att,
 	}
-	aggreSig, err := signing.ComputeDomainAndSign(beaconState, 0, aggregateAndProof, params.BeaconConfig().DomainAggregateAndProof, privKeys[aggregatorIndex])
-	require.NoError(t, err)
 
 	require.NoError(t, beaconState.SetGenesisTime(uint64(time.Now().Unix())))
 
@@ -134,7 +125,7 @@ func TestProcessPendingAtts_HasBlockSaveUnAggregatedAtt(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, r.cfg.beaconDB.SaveState(context.Background(), s, root))
 
-	r.blkRootToPendingAtts[root] = []ethpb.SignedAggregateAttAndProof{&ethpb.SignedAggregateAttestationAndProof{Message: aggregateAndProof, Signature: aggreSig}}
+	r.blkRootToPendingAtts[root] = []ethpb.SignedAggregateAttAndProof{&ethpb.SignedAggregateAttestationAndProof{Message: aggregateAndProof}}
 	require.NoError(t, r.processPendingAtts(context.Background()))
 
 	atts, err := r.cfg.attPool.UnaggregatedAttestations()
@@ -146,6 +137,80 @@ func TestProcessPendingAtts_HasBlockSaveUnAggregatedAtt(t *testing.T) {
 	cancel()
 }
 
+func TestProcessPendingAtts_HasBlockSaveUnAggregatedAttElectra(t *testing.T) {
+	hook := logTest.NewGlobal()
+	db := dbtest.SetupDB(t)
+	p1 := p2ptest.NewTestP2P(t)
+	validators := uint64(256)
+
+	beaconState, privKeys := util.DeterministicGenesisStateElectra(t, validators)
+
+	sb := util.NewBeaconBlockElectra()
+	util.SaveBlock(t, context.Background(), db, sb)
+	root, err := sb.Block.HashTreeRoot()
+	require.NoError(t, err)
+
+	att := &ethpb.SingleAttestation{
+		Data: &ethpb.AttestationData{
+			BeaconBlockRoot: root[:],
+			Source:          &ethpb.Checkpoint{Epoch: 0, Root: bytesutil.PadTo([]byte("hello-world"), 32)},
+			Target:          &ethpb.Checkpoint{Epoch: 0, Root: root[:]},
+		},
+	}
+	aggregateAndProof := &ethpb.AggregateAttestationAndProofSingle{
+		Aggregate: att,
+	}
+
+	committee, err := helpers.BeaconCommitteeFromState(context.Background(), beaconState, att.Data.Slot, att.Data.CommitteeIndex)
+	assert.NoError(t, err)
+	att.AttesterIndex = committee[0]
+	attesterDomain, err := signing.Domain(beaconState.Fork(), 0, params.BeaconConfig().DomainBeaconAttester, beaconState.GenesisValidatorsRoot())
+	require.NoError(t, err)
+	hashTreeRoot, err := signing.ComputeSigningRoot(att.Data, attesterDomain)
+	assert.NoError(t, err)
+	att.Signature = privKeys[committee[0]].Sign(hashTreeRoot[:]).Marshal()
+
+	require.NoError(t, beaconState.SetGenesisTime(uint64(time.Now().Unix())))
+
+	chain := &mock.ChainService{Genesis: time.Now(),
+		State: beaconState,
+		FinalizedCheckPoint: &ethpb.Checkpoint{
+			Root:  aggregateAndProof.Aggregate.Data.BeaconBlockRoot,
+			Epoch: 0,
+		},
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	r := &Service{
+		ctx: ctx,
+		cfg: &config{
+			p2p:      p1,
+			beaconDB: db,
+			chain:    chain,
+			clock:    startup.NewClock(chain.Genesis, chain.ValidatorsRoot),
+			attPool:  attestations.NewPool(),
+		},
+		blkRootToPendingAtts:             make(map[[32]byte][]ethpb.SignedAggregateAttAndProof),
+		seenUnAggregatedAttestationCache: lruwrpr.New(10),
+		signatureChan:                    make(chan *signatureVerifier, verifierLimit),
+	}
+	go r.verifierRoutine()
+
+	s, err := util.NewBeaconStateElectra()
+	require.NoError(t, err)
+	require.NoError(t, r.cfg.beaconDB.SaveState(context.Background(), s, root))
+
+	r.blkRootToPendingAtts[root] = []ethpb.SignedAggregateAttAndProof{&ethpb.SignedAggregateAttestationAndProofSingle{Message: aggregateAndProof}}
+	require.NoError(t, r.processPendingAtts(context.Background()))
+
+	atts, err := r.cfg.attPool.UnaggregatedAttestations()
+	require.NoError(t, err)
+	require.Equal(t, 1, len(atts), "Did not save unaggregated att")
+	assert.DeepEqual(t, att.ToAttestationElectra(committee), atts[0], "Incorrect saved att")
+	assert.Equal(t, 0, len(r.cfg.attPool.AggregatedAttestations()), "Did save aggregated att")
+	require.LogsContain(t, hook, "Verified and saved pending attestations to pool")
+	cancel()
+}
+
 func TestProcessPendingAtts_NoBroadcastWithBadSignature(t *testing.T) {
 	db := dbtest.SetupDB(t)
 	p1 := p2ptest.NewTestP2P(t)
@@ -465,12 +530,12 @@ func Test_attsAreEqual_Committee(t *testing.T) {
 			Message: &ethpb.AggregateAttestationAndProof{
 				Aggregate: &ethpb.Attestation{
 					Data: &ethpb.AttestationData{
-						CommitteeIndex: 123}}}}
+						CommitteeIndex: 0}}}}
 		att2 := &ethpb.SignedAggregateAttestationAndProof{
 			Message: &ethpb.AggregateAttestationAndProof{
 				Aggregate: &ethpb.Attestation{
 					Data: &ethpb.AttestationData{
-						CommitteeIndex: 123}}}}
+						CommitteeIndex: 0}}}}
 		assert.Equal(t, true, attsAreEqual(att1, att2))
 	})
 	t.Run("Phase 0 not equal", func(t *testing.T) {
@@ -478,12 +543,12 @@ func Test_attsAreEqual_Committee(t *testing.T) {
 			Message: &ethpb.AggregateAttestationAndProof{
 				Aggregate: &ethpb.Attestation{
 					Data: &ethpb.AttestationData{
-						CommitteeIndex: 123}}}}
+						CommitteeIndex: 0}}}}
 		att2 := &ethpb.SignedAggregateAttestationAndProof{
 			Message: &ethpb.AggregateAttestationAndProof{
 				Aggregate: &ethpb.Attestation{
 					Data: &ethpb.AttestationData{
-						CommitteeIndex: 456}}}}
+						CommitteeIndex: 1}}}}
 		assert.Equal(t, false, attsAreEqual(att1, att2))
 	})
 	t.Run("Electra equal", func(t *testing.T) {
@@ -524,4 +589,72 @@ func Test_attsAreEqual_Committee(t *testing.T) {
 				}}}
 		assert.Equal(t, false, attsAreEqual(att1, att2))
 	})
+	t.Run("Single and Electra not equal", func(t *testing.T) {
+		cb := primitives.NewAttestationCommitteeBits()
+		cb.SetBitAt(0, true)
+		att1 := &ethpb.SignedAggregateAttestationAndProofElectra{
+			Message: &ethpb.AggregateAttestationAndProofElectra{
+				Aggregate: &ethpb.AttestationElectra{
+					Data:          &ethpb.AttestationData{},
+					CommitteeBits: cb,
+				}}}
+		att2 := &ethpb.SignedAggregateAttestationAndProofSingle{
+			Message: &ethpb.AggregateAttestationAndProofSingle{
+				Aggregate: &ethpb.SingleAttestation{
+					CommitteeId:   0,
+					AttesterIndex: 0,
+					Data:          &ethpb.AttestationData{},
+				},
+			},
+		}
+		assert.Equal(t, false, attsAreEqual(att1, att2))
+	})
+	t.Run("Single equal", func(t *testing.T) {
+		att1 := &ethpb.SignedAggregateAttestationAndProofSingle{
+			Message: &ethpb.AggregateAttestationAndProofSingle{
+				Aggregate: &ethpb.SingleAttestation{
+					CommitteeId:   0,
+					AttesterIndex: 0,
+					Data:          &ethpb.AttestationData{},
+				},
+			},
+		}
+		att2 := &ethpb.SignedAggregateAttestationAndProofSingle{
+			Message: &ethpb.AggregateAttestationAndProofSingle{
+				Aggregate: &ethpb.SingleAttestation{
+					CommitteeId:   0,
+					AttesterIndex: 0,
+					Data:          &ethpb.AttestationData{},
+				},
+			},
+		}
+		assert.Equal(t, true, attsAreEqual(att1, att2))
+	})
+	t.Run("Single not equal", func(t *testing.T) {
+		// Same AttesterIndex but different CommitteeId
+		att1 := &ethpb.SignedAggregateAttestationAndProofSingle{
+			Message: &ethpb.AggregateAttestationAndProofSingle{
+				Aggregate: &ethpb.SingleAttestation{
+					CommitteeId:   0,
+					AttesterIndex: 0,
+					Data:          &ethpb.AttestationData{},
+				},
+			},
+		}
+		att2 := &ethpb.SignedAggregateAttestationAndProofSingle{
+			Message: &ethpb.AggregateAttestationAndProofSingle{
+				Aggregate: &ethpb.SingleAttestation{
+					CommitteeId:   1,
+					AttesterIndex: 0,
+					Data:          &ethpb.AttestationData{},
+				},
+			},
+		}
+		assert.Equal(t, false, attsAreEqual(att1, att2))
+
+		// Same CommitteeId but different AttesterIndex
+		att2.Message.Aggregate.CommitteeId = 0
+		att2.Message.Aggregate.AttesterIndex = 1
+		assert.Equal(t, false, attsAreEqual(att1, att2))
+	})
 }

beacon-chain/sync/subscriber_beacon_attestation.go

@@ -26,10 +26,7 @@ func (s *Service) committeeIndexBeaconAttestationSubscriber(_ context.Context, m
 	if data == nil {
 		return errors.New("nil attestation")
 	}
-	committeeIndex, err := a.GetCommitteeIndex()
-	if err != nil {
-		return errors.Wrap(err, "committeeIndexBeaconAttestationSubscriber failed to get committee index")
-	}
+	committeeIndex := a.GetCommitteeIndex()
 	s.setSeenCommitteeIndicesSlot(data.Slot, committeeIndex, a.GetAggregationBits())
 
 	if features.Get().EnableExperimentalAttestationPool {

beacon-chain/sync/validate_aggregate_proof.go

@@ -190,9 +190,16 @@ func (s *Service) validateAggregatedAtt(ctx context.Context, signed ethpb.Signed
 		return result, err
 	}
 
-	committee, result, err := s.validateBitLength(ctx, bs, aggregate.GetData().Slot, committeeIndex, aggregate.GetAggregationBits())
-	if result != pubsub.ValidationAccept {
-		return result, err
+	committee, err := helpers.BeaconCommitteeFromState(ctx, bs, aggregate.GetData().Slot, committeeIndex)
+	if err != nil {
+		tracing.AnnotateError(span, err)
+		return pubsub.ValidationIgnore, err
+	}
+
+	// Verify number of aggregation bits matches the committee size.
+	if err = helpers.VerifyBitfieldLength(aggregate.GetAggregationBits(), uint64(len(committee))); err != nil {
+		tracing.AnnotateError(span, err)
+		return pubsub.ValidationReject, err
 	}
 
 	// Verify validator index is within the beacon committee.

beacon-chain/sync/validate_aggregate_proof_test.go

@@ -94,13 +94,6 @@ func TestVerifyIndexInCommittee_ExistsInBeaconCommittee(t *testing.T) {
 	assert.ErrorContains(t, wanted, err)
 	assert.Equal(t, pubsub.ValidationReject, result)
 
-	att.AggregationBits = bitfield.NewBitlist(1)
-	committeeIndex, err := att.GetCommitteeIndex()
-	require.NoError(t, err)
-	_, result, err = service.validateBitLength(ctx, s, att.Data.Slot, committeeIndex, att.AggregationBits)
-	require.ErrorContains(t, "wanted participants bitfield length 4, got: 1", err)
-	assert.Equal(t, pubsub.ValidationReject, result)
-
 	att.Data.CommitteeIndex = 10000
 	_, _, result, err = service.validateCommitteeIndexAndCount(ctx, att, s)
 	require.ErrorContains(t, "committee index 10000 > 2", err)

beacon-chain/sync/validate_beacon_attestation.go

@@ -9,7 +9,6 @@ import (
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
@@ -71,14 +70,6 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(ctx context.Context, p
 	if data.Slot == 0 {
 		return pubsub.ValidationIgnore, nil
 	}
-	// Broadcast the unaggregated attestation on a feed to notify other services in the beacon node
-	// of a received unaggregated attestation.
-	s.cfg.attestationNotifier.OperationFeed().Send(&feed.Event{
-		Type: operation.UnaggregatedAttReceived,
-		Data: &operation.UnAggregatedAttReceivedData{
-			Attestation: att,
-		},
-	})
 
 	// Attestation's slot is within ATTESTATION_PROPAGATION_SLOT_RANGE and early attestation
 	// processing tolerance.
@@ -91,14 +82,7 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(ctx context.Context, p
 		return pubsub.ValidationReject, err
 	}
 
-	var validationRes pubsub.ValidationResult
-
-	committeeIndex, result, err := s.validateCommitteeIndex(ctx, att)
-	if result != pubsub.ValidationAccept {
-		wrappedErr := errors.Wrapf(err, "could not validate committee index for %s version", version.String(att.Version()))
-		tracing.AnnotateError(span, wrappedErr)
-		return result, wrappedErr
-	}
+	committeeIndex := att.GetCommitteeIndex()
 
 	if !features.Get().EnableSlasher {
 		// Verify this the first attestation received for the participating validator for the slot.
@@ -115,33 +99,19 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(ctx context.Context, p
 		}
 	}
 
+	var validationRes pubsub.ValidationResult
+
 	// Verify the block being voted and the processed state is in beaconDB and the block has passed validation if it's in the beaconDB.
 	blockRoot := bytesutil.ToBytes32(data.BeaconBlockRoot)
 	if !s.hasBlockAndState(ctx, blockRoot) {
-		// A node doesn't have the block, it'll request from peer while saving the pending attestation to a queue.
-		if att.Version() >= version.Electra {
-			a, ok := att.(*eth.AttestationElectra)
-			// This will never fail in practice because we asserted the version
-			if !ok {
-				return pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &eth.AttestationElectra{}, att)
-			}
-			s.savePendingAtt(&eth.SignedAggregateAttestationAndProofElectra{Message: &eth.AggregateAttestationAndProofElectra{Aggregate: a}})
-		} else {
-			a, ok := att.(*eth.Attestation)
-			// This will never fail in practice because we asserted the version
-			if !ok {
-				return pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &eth.Attestation{}, att)
-			}
-			s.savePendingAtt(&eth.SignedAggregateAttestationAndProof{Message: &eth.AggregateAttestationAndProof{Aggregate: a}})
-		}
-		return pubsub.ValidationIgnore, nil
+		return s.saveToPendingAttPool(att)
 	}
 
 	if !s.cfg.chain.InForkchoice(bytesutil.ToBytes32(data.BeaconBlockRoot)) {
 		tracing.AnnotateError(span, blockchain.ErrNotDescendantOfFinalized)
 		return pubsub.ValidationIgnore, blockchain.ErrNotDescendantOfFinalized
 	}
-	if err := s.cfg.chain.VerifyLmdFfgConsistency(ctx, att); err != nil {
+	if err = s.cfg.chain.VerifyLmdFfgConsistency(ctx, att); err != nil {
 		tracing.AnnotateError(span, err)
 		attBadLmdConsistencyCount.Inc()
 		return pubsub.ValidationReject, err
@@ -158,6 +128,25 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(ctx context.Context, p
 		return validationRes, err
 	}
 
+	committee, err := helpers.BeaconCommitteeFromState(ctx, preState, att.GetData().Slot, committeeIndex)
+	if err != nil {
+		tracing.AnnotateError(span, err)
+		return pubsub.ValidationIgnore, err
+	}
+
+	validationRes, err = validateAttesterData(ctx, att, committee)
+	if validationRes != pubsub.ValidationAccept {
+		return validationRes, err
+	}
+
+	if att.Version() >= version.Electra {
+		singleAtt, ok := att.(*eth.SingleAttestation)
+		if !ok {
+			return pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &eth.SingleAttestation{}, att)
+		}
+		att = singleAtt.ToAttestationElectra(committee)
+	}
+
 	validationRes, err = s.validateUnaggregatedAttWithState(ctx, att, preState)
 	if validationRes != pubsub.ValidationAccept {
 		return validationRes, err
@@ -192,6 +181,15 @@ func (s *Service) validateCommitteeIndexBeaconAttestation(ctx context.Context, p
 		}()
 	}
 
+	// Broadcast the unaggregated attestation on a feed to notify other services in the beacon node
+	// of a received unaggregated attestation.
+	s.cfg.attestationNotifier.OperationFeed().Send(&feed.Event{
+		Type: operation.UnaggregatedAttReceived,
+		Data: &operation.UnAggregatedAttReceivedData{
+			Attestation: att,
+		},
+	})
+
 	s.setSeenCommitteeIndicesSlot(data.Slot, committeeIndex, att.GetAggregationBits())
 
 	msg.ValidatorData = att
@@ -227,44 +225,39 @@ func (s *Service) validateCommitteeIndexAndCount(
 	a eth.Att,
 	bs state.ReadOnlyBeaconState,
 ) (primitives.CommitteeIndex, uint64, pubsub.ValidationResult, error) {
-	ci, result, err := s.validateCommitteeIndex(ctx, a)
-	if result != pubsub.ValidationAccept {
-		return 0, 0, result, err
+	// - [REJECT] attestation.data.index == 0
+	if a.Version() >= version.Electra && a.GetData().CommitteeIndex != 0 {
+		return 0, 0, pubsub.ValidationReject, errors.New("attestation data's committee index must be 0")
 	}
 	valCount, err := helpers.ActiveValidatorCount(ctx, bs, slots.ToEpoch(a.GetData().Slot))
 	if err != nil {
 		return 0, 0, pubsub.ValidationIgnore, err
 	}
 	count := helpers.SlotCommitteeCount(valCount)
+	ci := a.GetCommitteeIndex()
 	if uint64(ci) > count {
-		return 0, 0, pubsub.ValidationReject, fmt.Errorf("committee index %d > %d", a.GetData().CommitteeIndex, count)
+		return 0, 0, pubsub.ValidationReject, fmt.Errorf("committee index %d > %d", ci, count)
 	}
 	return ci, valCount, pubsub.ValidationAccept, nil
 }
 
-func (s *Service) validateCommitteeIndex(ctx context.Context, a eth.Att) (primitives.CommitteeIndex, pubsub.ValidationResult, error) {
+func validateAttesterData(
+	ctx context.Context,
+	a eth.Att,
+	committee []primitives.ValidatorIndex,
+) (pubsub.ValidationResult, error) {
 	if a.Version() >= version.Electra {
-		return validateCommitteeIndexElectra(ctx, a)
-	}
-	return a.GetData().CommitteeIndex, pubsub.ValidationAccept, nil
-}
-
-// This validates beacon unaggregated attestation using the given state, the validation consists of bitfield length and count consistency
-// and signature verification.
-func (s *Service) validateUnaggregatedAttWithState(ctx context.Context, a eth.Att, bs state.ReadOnlyBeaconState) (pubsub.ValidationResult, error) {
-	ctx, span := trace.StartSpan(ctx, "sync.validateUnaggregatedAttWithState")
-	defer span.End()
-
-	committeeIndex, err := a.GetCommitteeIndex()
-	if err != nil {
-		return pubsub.ValidationIgnore, err
+		singleAtt, ok := a.(*eth.SingleAttestation)
+		if !ok {
+			return pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &eth.SingleAttestation{}, a)
+		}
+		return validateAttestingIndex(ctx, singleAtt.AttesterIndex, committee)
 	}
 
-	committee, result, err := s.validateBitLength(ctx, bs, a.GetData().Slot, committeeIndex, a.GetAggregationBits())
-	if result != pubsub.ValidationAccept {
-		return result, err
+	// Verify number of aggregation bits matches the committee size.
+	if err := helpers.VerifyBitfieldLength(a.GetAggregationBits(), uint64(len(committee))); err != nil {
+		return pubsub.ValidationReject, err
 	}
-
 	// Attestation must be unaggregated and the bit index must exist in the range of committee indices.
 	// Note: The Ethereum Beacon chain spec suggests (len(get_attesting_indices(state, attestation.data, attestation.aggregation_bits)) == 1)
 	// however this validation can be achieved without use of get_attesting_indices which is an O(n) lookup.
@@ -272,33 +265,46 @@ func (s *Service) validateUnaggregatedAttWithState(ctx context.Context, a eth.At
 		return pubsub.ValidationReject, errors.New("attestation bitfield is invalid")
 	}
 
+	return pubsub.ValidationAccept, nil
+}
+
+// This validates beacon unaggregated attestation using the given state, the validation consists of signature verification.
+func (s *Service) validateUnaggregatedAttWithState(ctx context.Context, a eth.Att, bs state.ReadOnlyBeaconState) (pubsub.ValidationResult, error) {
+	ctx, span := trace.StartSpan(ctx, "sync.validateUnaggregatedAttWithState")
+	defer span.End()
+
 	set, err := blocks.AttestationSignatureBatch(ctx, bs, []eth.Att{a})
 	if err != nil {
 		tracing.AnnotateError(span, err)
 		attBadSignatureBatchCount.Inc()
 		return pubsub.ValidationReject, err
 	}
+
 	return s.validateWithBatchVerifier(ctx, "attestation", set)
 }
 
-func (s *Service) validateBitLength(
+func validateAttestingIndex(
 	ctx context.Context,
-	bs state.ReadOnlyBeaconState,
-	slot primitives.Slot,
-	committeeIndex primitives.CommitteeIndex,
-	aggregationBits bitfield.Bitlist,
-) ([]primitives.ValidatorIndex, pubsub.ValidationResult, error) {
-	committee, err := helpers.BeaconCommitteeFromState(ctx, bs, slot, committeeIndex)
-	if err != nil {
-		return nil, pubsub.ValidationIgnore, err
+	attestingIndex primitives.ValidatorIndex,
+	committee []primitives.ValidatorIndex,
+) (pubsub.ValidationResult, error) {
+	_, span := trace.StartSpan(ctx, "sync.validateAttestingIndex")
+	defer span.End()
+
+	// _[REJECT]_ The attester is a member of the committee -- i.e.
+	//  `attestation.attester_index in get_beacon_committee(state, attestation.data.slot, index)`.
+	inCommittee := false
+	for _, ix := range committee {
+		if attestingIndex == ix {
+			inCommittee = true
+			break
+		}
+	}
+	if !inCommittee {
+		return pubsub.ValidationReject, errors.New("attester is not a member of the committee")
 	}
 
-	// Verify number of aggregation bits matches the committee size.
-	if err := helpers.VerifyBitfieldLength(aggregationBits, uint64(len(committee))); err != nil {
-		return nil, pubsub.ValidationReject, err
-	}
-
-	return committee, pubsub.ValidationAccept, nil
+	return pubsub.ValidationAccept, nil
 }
 
 // Returns true if the attestation was already seen for the participating validator for the slot.
@@ -327,3 +333,31 @@ func (s *Service) hasBlockAndState(ctx context.Context, blockRoot [32]byte) bool
 	hasState := hasStateSummary || s.cfg.beaconDB.HasState(ctx, blockRoot)
 	return hasState && s.cfg.chain.HasBlock(ctx, blockRoot)
 }
+
+func (s *Service) saveToPendingAttPool(att eth.Att) (pubsub.ValidationResult, error) {
+	// A node doesn't have the block, it'll request from peer while saving the pending attestation to a queue.
+	if att.Version() >= version.Electra {
+		a, ok := att.(*eth.SingleAttestation)
+		// This will never fail in practice because we asserted the version
+		if !ok {
+			return pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &eth.SingleAttestation{}, att)
+		}
+		// Even though there is no AggregateAndProof type to hold a single attestation, our design of pending atts pool
+		// requires to have an AggregateAndProof object, even for unaggregated attestations.
+		// Because of this we need to have a single attestation version of it to be able to save single attestations into the pool.
+		// It's not possible to convert the single attestation into an electra attestation before saving to the pool
+		// because crucial verification steps can't be performed without the block, and converting prior to these checks
+		// opens up DoS attacks.
+		// The AggregateAndProof object is discarded once we process the pending attestation and code paths dealing
+		// with "real" AggregateAndProof objects (ones that hold actual aggregates) don't use the single attestation version anywhere.
+		s.savePendingAtt(&eth.SignedAggregateAttestationAndProofSingle{Message: &eth.AggregateAttestationAndProofSingle{Aggregate: a}})
+	} else {
+		a, ok := att.(*eth.Attestation)
+		// This will never fail in practice because we asserted the version
+		if !ok {
+			return pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &eth.Attestation{}, att)
+		}
+		s.savePendingAtt(&eth.SignedAggregateAttestationAndProof{Message: &eth.AggregateAttestationAndProof{Aggregate: a}})
+	}
+	return pubsub.ValidationIgnore, nil
+}

beacon-chain/sync/validate_beacon_attestation_electra.go

@@ -1,28 +0,0 @@
-package sync
-
-import (
-	"context"
-	"fmt"
-
-	pubsub "github.com/libp2p/go-libp2p-pubsub"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-)
-
-// validateCommitteeIndexElectra implements the following checks from the spec:
-//   - [REJECT] len(committee_indices) == 1, where committee_indices = get_committee_indices(attestation).
-//   - [REJECT] attestation.data.index == 0
-func validateCommitteeIndexElectra(ctx context.Context, a ethpb.Att) (primitives.CommitteeIndex, pubsub.ValidationResult, error) {
-	_, span := trace.StartSpan(ctx, "sync.validateCommitteeIndexElectra")
-	defer span.End()
-	_, ok := a.(*ethpb.AttestationElectra)
-	if !ok {
-		return 0, pubsub.ValidationIgnore, fmt.Errorf("attestation has wrong type (expected %T, got %T)", &ethpb.AttestationElectra{}, a)
-	}
-	committeeIndex, err := a.GetCommitteeIndex()
-	if err != nil {
-		return 0, pubsub.ValidationReject, err
-	}
-	return committeeIndex, pubsub.ValidationAccept, nil
-}

beacon-chain/sync/validate_beacon_attestation_electra_test.go

@@ -1,46 +0,0 @@
-package sync
-
-import (
-	"context"
-	"testing"
-
-	pubsub "github.com/libp2p/go-libp2p-pubsub"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v5/testing/assert"
-	"github.com/prysmaticlabs/prysm/v5/testing/require"
-)
-
-func Test_validateCommitteeIndexElectra(t *testing.T) {
-	ctx := context.Background()
-
-	t.Run("valid", func(t *testing.T) {
-		cb := primitives.NewAttestationCommitteeBits()
-		cb.SetBitAt(1, true)
-		ci, res, err := validateCommitteeIndexElectra(ctx, &ethpb.AttestationElectra{Data: &ethpb.AttestationData{}, CommitteeBits: cb})
-		require.NoError(t, err)
-		assert.Equal(t, pubsub.ValidationAccept, res)
-		assert.Equal(t, primitives.CommitteeIndex(1), ci)
-	})
-	t.Run("non-zero data committee index", func(t *testing.T) {
-		cb := primitives.NewAttestationCommitteeBits()
-		cb.SetBitAt(1, true)
-		_, res, err := validateCommitteeIndexElectra(ctx, &ethpb.AttestationElectra{Data: &ethpb.AttestationData{CommitteeIndex: 1}, CommitteeBits: cb})
-		assert.NotNil(t, err)
-		assert.Equal(t, pubsub.ValidationReject, res)
-	})
-	t.Run("no committee bits set", func(t *testing.T) {
-		cb := primitives.NewAttestationCommitteeBits()
-		_, res, err := validateCommitteeIndexElectra(ctx, &ethpb.AttestationElectra{Data: &ethpb.AttestationData{}, CommitteeBits: cb})
-		assert.NotNil(t, err)
-		assert.Equal(t, pubsub.ValidationReject, res)
-	})
-	t.Run("more than 1 committee bit set", func(t *testing.T) {
-		cb := primitives.NewAttestationCommitteeBits()
-		cb.SetBitAt(0, true)
-		cb.SetBitAt(1, true)
-		_, res, err := validateCommitteeIndexElectra(ctx, &ethpb.AttestationElectra{Data: &ethpb.AttestationData{}, CommitteeBits: cb})
-		assert.NotNil(t, err)
-		assert.Equal(t, pubsub.ValidationReject, res)
-	})
-}

beacon-chain/sync/validate_beacon_attestation_test.go

@@ -20,6 +20,7 @@ import (
 	lruwrpr "github.com/prysmaticlabs/prysm/v5/cache/lru"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
@@ -81,7 +82,7 @@ func TestService_validateCommitteeIndexBeaconAttestation(t *testing.T) {
 
 	tests := []struct {
 		name                      string
-		msg                       *ethpb.Attestation
+		msg                       ethpb.Att
 		topic                     string
 		validAttestationSignature bool
 		want                      bool
@@ -262,20 +263,20 @@ func TestService_validateCommitteeIndexBeaconAttestation(t *testing.T) {
 			helpers.ClearCache()
 			chain.ValidAttestation = tt.validAttestationSignature
 			if tt.validAttestationSignature {
-				com, err := helpers.BeaconCommitteeFromState(context.Background(), savedState, tt.msg.Data.Slot, tt.msg.Data.CommitteeIndex)
+				com, err := helpers.BeaconCommitteeFromState(context.Background(), savedState, tt.msg.GetData().Slot, tt.msg.GetData().CommitteeIndex)
 				require.NoError(t, err)
-				domain, err := signing.Domain(savedState.Fork(), tt.msg.Data.Target.Epoch, params.BeaconConfig().DomainBeaconAttester, savedState.GenesisValidatorsRoot())
+				domain, err := signing.Domain(savedState.Fork(), tt.msg.GetData().Target.Epoch, params.BeaconConfig().DomainBeaconAttester, savedState.GenesisValidatorsRoot())
 				require.NoError(t, err)
-				attRoot, err := signing.ComputeSigningRoot(tt.msg.Data, domain)
+				attRoot, err := signing.ComputeSigningRoot(tt.msg.GetData(), domain)
 				require.NoError(t, err)
 				for i := 0; ; i++ {
-					if tt.msg.AggregationBits.BitAt(uint64(i)) {
-						tt.msg.Signature = keys[com[i]].Sign(attRoot[:]).Marshal()
+					if tt.msg.GetAggregationBits().BitAt(uint64(i)) {
+						tt.msg.SetSignature(keys[com[i]].Sign(attRoot[:]).Marshal())
 						break
 					}
 				}
 			} else {
-				tt.msg.Signature = make([]byte, 96)
+				tt.msg.SetSignature(make([]byte, 96))
 			}
 			buf := new(bytes.Buffer)
 			_, err := p.Encoding().EncodeGossip(buf, tt.msg)
@@ -305,6 +306,165 @@ func TestService_validateCommitteeIndexBeaconAttestation(t *testing.T) {
 	}
 }
 
+func TestService_validateCommitteeIndexBeaconAttestationElectra(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig()
+	fvs := map[[fieldparams.VersionLength]byte]primitives.Epoch{}
+	fvs[bytesutil.ToBytes4(cfg.GenesisForkVersion)] = 1
+	fvs[bytesutil.ToBytes4(cfg.AltairForkVersion)] = 2
+	fvs[bytesutil.ToBytes4(cfg.BellatrixForkVersion)] = 3
+	fvs[bytesutil.ToBytes4(cfg.CapellaForkVersion)] = 4
+	fvs[bytesutil.ToBytes4(cfg.DenebForkVersion)] = 5
+	fvs[bytesutil.ToBytes4(cfg.FuluForkVersion)] = 6
+	fvs[bytesutil.ToBytes4(cfg.ElectraForkVersion)] = 0
+	cfg.ForkVersionSchedule = fvs
+	params.OverrideBeaconConfig(cfg)
+
+	p := p2ptest.NewTestP2P(t)
+	db := dbtest.SetupDB(t)
+	chain := &mockChain.ChainService{
+		// 1 slot ago.
+		Genesis:          time.Now().Add(time.Duration(-1*int64(params.BeaconConfig().SecondsPerSlot)) * time.Second),
+		ValidatorsRoot:   [32]byte{'A'},
+		ValidAttestation: true,
+		DB:               db,
+		Optimistic:       true,
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	s := &Service{
+		ctx: ctx,
+		cfg: &config{
+			initialSync:         &mockSync.Sync{IsSyncing: false},
+			p2p:                 p,
+			beaconDB:            db,
+			chain:               chain,
+			clock:               startup.NewClock(chain.Genesis, chain.ValidatorsRoot),
+			attestationNotifier: (&mockChain.ChainService{}).OperationNotifier(),
+		},
+		blkRootToPendingAtts:             make(map[[32]byte][]ethpb.SignedAggregateAttAndProof),
+		seenUnAggregatedAttestationCache: lruwrpr.New(10),
+		signatureChan:                    make(chan *signatureVerifier, verifierLimit),
+	}
+	s.initCaches()
+	go s.verifierRoutine()
+
+	digest, err := s.currentForkDigest()
+	require.NoError(t, err)
+
+	blk := util.NewBeaconBlock()
+	blk.Block.Slot = 1
+	util.SaveBlock(t, ctx, db, blk)
+
+	validBlockRoot, err := blk.Block.HashTreeRoot()
+	require.NoError(t, err)
+	chain.FinalizedCheckPoint = &ethpb.Checkpoint{
+		Root:  validBlockRoot[:],
+		Epoch: 0,
+	}
+
+	validators := uint64(64)
+	savedState, keys := util.DeterministicGenesisState(t, validators)
+	require.NoError(t, savedState.SetSlot(1))
+	require.NoError(t, db.SaveState(context.Background(), savedState, validBlockRoot))
+	chain.State = savedState
+	committee, err := helpers.BeaconCommitteeFromState(ctx, savedState, 1, 0)
+	require.NoError(t, err)
+
+	tests := []struct {
+		name string
+		msg  ethpb.Att
+		want bool
+	}{
+		{
+			name: "valid",
+			msg: &ethpb.SingleAttestation{
+				Data: &ethpb.AttestationData{
+					BeaconBlockRoot: validBlockRoot[:],
+					CommitteeIndex:  0,
+					Slot:            1,
+					Target: &ethpb.Checkpoint{
+						Epoch: 0,
+						Root:  validBlockRoot[:],
+					},
+					Source: &ethpb.Checkpoint{Root: make([]byte, fieldparams.RootLength)},
+				},
+				AttesterIndex: committee[0],
+			},
+			want: true,
+		},
+		{
+			name: "non-zero committee index in att data",
+			msg: &ethpb.SingleAttestation{
+				Data: &ethpb.AttestationData{
+					BeaconBlockRoot: validBlockRoot[:],
+					CommitteeIndex:  1,
+					Slot:            1,
+					Target: &ethpb.Checkpoint{
+						Epoch: 0,
+						Root:  validBlockRoot[:],
+					},
+					Source: &ethpb.Checkpoint{Root: make([]byte, fieldparams.RootLength)},
+				},
+				AttesterIndex: committee[0],
+			},
+			want: false,
+		},
+		{
+			name: "attesting index not in committee",
+			msg: &ethpb.SingleAttestation{
+				Data: &ethpb.AttestationData{
+					BeaconBlockRoot: validBlockRoot[:],
+					CommitteeIndex:  1,
+					Slot:            1,
+					Target: &ethpb.Checkpoint{
+						Epoch: 0,
+						Root:  validBlockRoot[:],
+					},
+					Source: &ethpb.Checkpoint{Root: make([]byte, fieldparams.RootLength)},
+				},
+				AttesterIndex: 999999,
+			},
+			want: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			helpers.ClearCache()
+			com, err := helpers.BeaconCommitteeFromState(context.Background(), savedState, tt.msg.GetData().Slot, tt.msg.GetData().CommitteeIndex)
+			require.NoError(t, err)
+			domain, err := signing.Domain(savedState.Fork(), tt.msg.GetData().Target.Epoch, params.BeaconConfig().DomainBeaconAttester, savedState.GenesisValidatorsRoot())
+			require.NoError(t, err)
+			attRoot, err := signing.ComputeSigningRoot(tt.msg.GetData(), domain)
+			require.NoError(t, err)
+			tt.msg.SetSignature(keys[com[0]].Sign(attRoot[:]).Marshal())
+			buf := new(bytes.Buffer)
+			_, err = p.Encoding().EncodeGossip(buf, tt.msg)
+			require.NoError(t, err)
+			topic := fmt.Sprintf("/eth2/%x/beacon_attestation_1", digest)
+			m := &pubsub.Message{
+				Message: &pubsubpb.Message{
+					Data:  buf.Bytes(),
+					Topic: &topic,
+				},
+			}
+
+			res, err := s.validateCommitteeIndexBeaconAttestation(ctx, "", m)
+			received := res == pubsub.ValidationAccept
+			if received != tt.want {
+				t.Fatalf("Did not received wanted validation. Got %v, wanted %v", !tt.want, tt.want)
+			}
+			if tt.want && err != nil {
+				t.Errorf("Non nil error returned: %v", err)
+			}
+			if tt.want && m.ValidatorData == nil {
+				t.Error("Expected validator data to be set")
+			}
+		})
+	}
+}
+
 func TestService_setSeenCommitteeIndicesSlot(t *testing.T) {
 	s := NewService(context.Background(), WithP2P(p2ptest.NewTestP2P(t)))
 	s.initCaches()

proto/prysm/v1alpha1/BUILD.bazel

@@ -149,6 +149,7 @@ ssz_deneb_objs = [
 
 ssz_electra_objs = [
     "AggregateAttestationAndProofElectra",
+    "AggregateAttestationAndProofSingle",
     "AttestationElectra",
     "AttesterSlashingElectra",
     "BeaconBlockElectra",
@@ -168,6 +169,7 @@ ssz_electra_objs = [
     "PendingConsolidation",
     "PendingPartialWithdrawal",
     "SignedAggregateAttestationAndProofElectra",
+    "SignedAggregateAttestationAndProofSingle",
     "SignedBeaconBlockContentsElectra",
     "SignedBeaconBlockElectra",
     "SignedBlindedBeaconBlockElectra",
@@ -384,8 +386,8 @@ ssz_proto_files(
         "beacon_block.proto",
         "beacon_state.proto",
         "blobs.proto",
-        "light_client.proto",
         "data_columns.proto",
+        "light_client.proto",
         "sync_committee.proto",
         "withdrawals.proto",
     ],

proto/prysm/v1alpha1/attestation.go

@@ -1,9 +1,6 @@
 package eth
 
 import (
-	"fmt"
-
-	"github.com/pkg/errors"
 	ssz "github.com/prysmaticlabs/fastssz"
 	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@@ -20,14 +17,16 @@ type Att interface {
 	ssz.HashRoot
 	Version() int
 	IsNil() bool
+	IsSingle() bool
 	IsAggregated() bool
 	Clone() Att
 	GetAggregationBits() bitfield.Bitlist
+	GetAttestingIndex() primitives.ValidatorIndex
 	GetData() *AttestationData
 	CommitteeBitsVal() bitfield.Bitfield
 	GetSignature() []byte
 	SetSignature(sig []byte)
-	GetCommitteeIndex() (primitives.CommitteeIndex, error)
+	GetCommitteeIndex() primitives.CommitteeIndex
 }
 
 // IndexedAtt defines common functionality for all indexed attestation types.
@@ -115,6 +114,11 @@ func (a *Attestation) IsNil() bool {
 	return a == nil || a.Data == nil
 }
 
+// IsSingle returns true when the attestation can have only a single attester index.
+func (*Attestation) IsSingle() bool {
+	return false
+}
+
 // IsAggregated --
 func (a *Attestation) IsAggregated() bool {
 	return a.AggregationBits.Count() > 1
@@ -137,6 +141,11 @@ func (a *Attestation) Copy() *Attestation {
 	}
 }
 
+// GetAttestingIndex --
+func (*Attestation) GetAttestingIndex() primitives.ValidatorIndex {
+	return 0
+}
+
 // CommitteeBitsVal --
 func (a *Attestation) CommitteeBitsVal() bitfield.Bitfield {
 	cb := primitives.NewAttestationCommitteeBits()
@@ -150,11 +159,11 @@ func (a *Attestation) SetSignature(sig []byte) {
 }
 
 // GetCommitteeIndex --
-func (a *Attestation) GetCommitteeIndex() (primitives.CommitteeIndex, error) {
+func (a *Attestation) GetCommitteeIndex() primitives.CommitteeIndex {
 	if a == nil || a.Data == nil {
-		return 0, errors.New("nil attestation data")
+		return 0
 	}
-	return a.Data.CommitteeIndex, nil
+	return a.Data.CommitteeIndex
 }
 
 // Version --
@@ -167,6 +176,11 @@ func (a *PendingAttestation) IsNil() bool {
 	return a == nil || a.Data == nil
 }
 
+// IsSingle returns true when the attestation can have only a single attester index.
+func (*PendingAttestation) IsSingle() bool {
+	return false
+}
+
 // IsAggregated --
 func (a *PendingAttestation) IsAggregated() bool {
 	return a.AggregationBits.Count() > 1
@@ -190,6 +204,11 @@ func (a *PendingAttestation) Copy() *PendingAttestation {
 	}
 }
 
+// GetAttestingIndex --
+func (*PendingAttestation) GetAttestingIndex() primitives.ValidatorIndex {
+	return 0
+}
+
 // CommitteeBitsVal --
 func (a *PendingAttestation) CommitteeBitsVal() bitfield.Bitfield {
 	return nil
@@ -204,11 +223,11 @@ func (a *PendingAttestation) GetSignature() []byte {
 func (a *PendingAttestation) SetSignature(_ []byte) {}
 
 // GetCommitteeIndex --
-func (a *PendingAttestation) GetCommitteeIndex() (primitives.CommitteeIndex, error) {
+func (a *PendingAttestation) GetCommitteeIndex() primitives.CommitteeIndex {
 	if a == nil || a.Data == nil {
-		return 0, errors.New("nil attestation data")
+		return 0
 	}
-	return a.Data.CommitteeIndex, nil
+	return a.Data.CommitteeIndex
 }
 
 // Version --
@@ -221,6 +240,11 @@ func (a *AttestationElectra) IsNil() bool {
 	return a == nil || a.Data == nil
 }
 
+// IsSingle returns true when the attestation can have only a single attester index.
+func (*AttestationElectra) IsSingle() bool {
+	return false
+}
+
 // IsAggregated --
 func (a *AttestationElectra) IsAggregated() bool {
 	return a.AggregationBits.Count() > 1
@@ -244,6 +268,11 @@ func (a *AttestationElectra) Copy() *AttestationElectra {
 	}
 }
 
+// GetAttestingIndex --
+func (*AttestationElectra) GetAttestingIndex() primitives.ValidatorIndex {
+	return 0
+}
+
 // CommitteeBitsVal --
 func (a *AttestationElectra) CommitteeBitsVal() bitfield.Bitfield {
 	return a.CommitteeBits
@@ -255,21 +284,101 @@ func (a *AttestationElectra) SetSignature(sig []byte) {
 }
 
 // GetCommitteeIndex --
-func (a *AttestationElectra) GetCommitteeIndex() (primitives.CommitteeIndex, error) {
-	if a == nil || a.Data == nil {
-		return 0, errors.New("nil attestation data")
-	}
+func (a *AttestationElectra) GetCommitteeIndex() primitives.CommitteeIndex {
 	if len(a.CommitteeBits) == 0 {
-		return 0, errors.New("no committee bits found in attestation")
-	}
-	if a.Data.CommitteeIndex != 0 {
-		return 0, fmt.Errorf("attestation data's committee index must be 0 but was %d", a.Data.CommitteeIndex)
+		return 0
 	}
 	indices := a.CommitteeBits.BitIndices()
-	if len(indices) != 1 {
-		return 0, fmt.Errorf("exactly 1 committee index must be set but %d were set", len(indices))
+	if len(indices) == 0 {
+		return 0
+	}
+	return primitives.CommitteeIndex(uint64(indices[0]))
+}
+
+// Version --
+func (a *SingleAttestation) Version() int {
+	return version.Electra
+}
+
+// IsNil --
+func (a *SingleAttestation) IsNil() bool {
+	return a == nil || a.Data == nil
+}
+
+// IsAggregated --
+func (a *SingleAttestation) IsAggregated() bool {
+	return false
+}
+
+// IsSingle returns true when the attestation can have only a single attester index.
+func (*SingleAttestation) IsSingle() bool {
+	return true
+}
+
+// Clone --
+func (a *SingleAttestation) Clone() Att {
+	return a.Copy()
+}
+
+// Copy --
+func (a *SingleAttestation) Copy() *SingleAttestation {
+	if a == nil {
+		return nil
+	}
+	return &SingleAttestation{
+		CommitteeId:   a.CommitteeId,
+		AttesterIndex: a.AttesterIndex,
+		Data:          a.Data.Copy(),
+		Signature:     bytesutil.SafeCopyBytes(a.Signature),
+	}
+}
+
+// GetAttestingIndex --
+func (a *SingleAttestation) GetAttestingIndex() primitives.ValidatorIndex {
+	return a.AttesterIndex
+}
+
+// CommitteeBitsVal --
+func (a *SingleAttestation) CommitteeBitsVal() bitfield.Bitfield {
+	cb := primitives.NewAttestationCommitteeBits()
+	cb.SetBitAt(uint64(a.CommitteeId), true)
+	return cb
+}
+
+// GetAggregationBits --
+func (a *SingleAttestation) GetAggregationBits() bitfield.Bitlist {
+	return nil
+}
+
+// SetSignature --
+func (a *SingleAttestation) SetSignature(sig []byte) {
+	a.Signature = sig
+}
+
+// GetCommitteeIndex --
+func (a *SingleAttestation) GetCommitteeIndex() primitives.CommitteeIndex {
+	return a.CommitteeId
+}
+
+// ToAttestationElectra converts the attestation to an AttestationElectra.
+func (a *SingleAttestation) ToAttestationElectra(committee []primitives.ValidatorIndex) *AttestationElectra {
+	cb := primitives.NewAttestationCommitteeBits()
+	cb.SetBitAt(uint64(a.CommitteeId), true)
+
+	ab := bitfield.NewBitlist(uint64(len(committee)))
+	for i, ix := range committee {
+		if a.AttesterIndex == ix {
+			ab.SetBitAt(uint64(i), true)
+			break
+		}
+	}
+
+	return &AttestationElectra{
+		AggregationBits: ab,
+		Data:            a.Data,
+		Signature:       a.Signature,
+		CommitteeBits:   cb,
 	}
-	return primitives.CommitteeIndex(uint64(indices[0])), nil
 }
 
 // Version --
@@ -419,6 +528,21 @@ func (a *AggregateAttestationAndProofElectra) AggregateVal() Att {
 	return a.Aggregate
 }
 
+// Version --
+func (a *AggregateAttestationAndProofSingle) Version() int {
+	return version.Electra
+}
+
+// IsNil --
+func (a *AggregateAttestationAndProofSingle) IsNil() bool {
+	return a == nil || a.Aggregate == nil || a.Aggregate.IsNil()
+}
+
+// AggregateVal --
+func (a *AggregateAttestationAndProofSingle) AggregateVal() Att {
+	return a.Aggregate
+}
+
 // Version --
 func (a *SignedAggregateAttestationAndProof) Version() int {
 	return version.Phase0
@@ -448,3 +572,18 @@ func (a *SignedAggregateAttestationAndProofElectra) IsNil() bool {
 func (a *SignedAggregateAttestationAndProofElectra) AggregateAttestationAndProof() AggregateAttAndProof {
 	return a.Message
 }
+
+// Version --
+func (a *SignedAggregateAttestationAndProofSingle) Version() int {
+	return version.Electra
+}
+
+// IsNil --
+func (a *SignedAggregateAttestationAndProofSingle) IsNil() bool {
+	return a == nil || a.Message == nil || a.Message.IsNil()
+}
+
+// AggregateAttestationAndProof --
+func (a *SignedAggregateAttestationAndProofSingle) AggregateAttestationAndProof() AggregateAttAndProof {
+	return a.Message
+}

proto/prysm/v1alpha1/attestation.pb.go

@@ -528,6 +528,124 @@ func (x *AttestationElectra) GetCommitteeBits() github_com_prysmaticlabs_go_bitf
 	return github_com_prysmaticlabs_go_bitfield.Bitvector64(nil)
 }
 
+type SignedAggregateAttestationAndProofSingle struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Message   *AggregateAttestationAndProofSingle `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	Signature []byte                              `protobuf:"bytes,2,opt,name=signature,proto3" json:"signature,omitempty" ssz-size:"96"`
+}
+
+func (x *SignedAggregateAttestationAndProofSingle) Reset() {
+	*x = SignedAggregateAttestationAndProofSingle{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[8]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SignedAggregateAttestationAndProofSingle) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SignedAggregateAttestationAndProofSingle) ProtoMessage() {}
+
+func (x *SignedAggregateAttestationAndProofSingle) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[8]
+	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 SignedAggregateAttestationAndProofSingle.ProtoReflect.Descriptor instead.
+func (*SignedAggregateAttestationAndProofSingle) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_attestation_proto_rawDescGZIP(), []int{8}
+}
+
+func (x *SignedAggregateAttestationAndProofSingle) GetMessage() *AggregateAttestationAndProofSingle {
+	if x != nil {
+		return x.Message
+	}
+	return nil
+}
+
+func (x *SignedAggregateAttestationAndProofSingle) GetSignature() []byte {
+	if x != nil {
+		return x.Signature
+	}
+	return nil
+}
+
+type AggregateAttestationAndProofSingle struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	AggregatorIndex github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex `protobuf:"varint,1,opt,name=aggregator_index,json=aggregatorIndex,proto3" json:"aggregator_index,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"`
+	Aggregate       *SingleAttestation                                                          `protobuf:"bytes,3,opt,name=aggregate,proto3" json:"aggregate,omitempty"`
+	SelectionProof  []byte                                                                      `protobuf:"bytes,2,opt,name=selection_proof,json=selectionProof,proto3" json:"selection_proof,omitempty" ssz-size:"96"`
+}
+
+func (x *AggregateAttestationAndProofSingle) Reset() {
+	*x = AggregateAttestationAndProofSingle{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AggregateAttestationAndProofSingle) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AggregateAttestationAndProofSingle) ProtoMessage() {}
+
+func (x *AggregateAttestationAndProofSingle) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[9]
+	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 AggregateAttestationAndProofSingle.ProtoReflect.Descriptor instead.
+func (*AggregateAttestationAndProofSingle) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_attestation_proto_rawDescGZIP(), []int{9}
+}
+
+func (x *AggregateAttestationAndProofSingle) GetAggregatorIndex() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex {
+	if x != nil {
+		return x.AggregatorIndex
+	}
+	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex(0)
+}
+
+func (x *AggregateAttestationAndProofSingle) GetAggregate() *SingleAttestation {
+	if x != nil {
+		return x.Aggregate
+	}
+	return nil
+}
+
+func (x *AggregateAttestationAndProofSingle) GetSelectionProof() []byte {
+	if x != nil {
+		return x.SelectionProof
+	}
+	return nil
+}
+
 type SingleAttestation struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -542,7 +660,7 @@ type SingleAttestation struct {
 func (x *SingleAttestation) Reset() {
 	*x = SingleAttestation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[8]
+		mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -555,7 +673,7 @@ func (x *SingleAttestation) String() string {
 func (*SingleAttestation) ProtoMessage() {}
 
 func (x *SingleAttestation) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[8]
+	mi := &file_proto_prysm_v1alpha1_attestation_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -568,7 +686,7 @@ func (x *SingleAttestation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SingleAttestation.ProtoReflect.Descriptor instead.
 func (*SingleAttestation) Descriptor() ([]byte, []int) {
-	return file_proto_prysm_v1alpha1_attestation_proto_rawDescGZIP(), []int{8}
+	return file_proto_prysm_v1alpha1_attestation_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *SingleAttestation) GetCommitteeId() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.CommitteeIndex {
@@ -730,39 +848,68 @@ var file_proto_prysm_v1alpha1_attestation_proto_rawDesc = []byte{
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+	0x61, 0x74, 0x61, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x26, 0x2e, 0x65, 0x74, 0x68, 0x65,
+	0x72, 0x65, 0x75, 0x6d, 0x2e, 0x65, 0x74, 0x68, 0x2e, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61,
+	0x31, 0x2e, 0x41, 0x74, 0x74, 0x65, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x44, 0x61, 0x74,
+	0x61, 0x52, 0x04, 0x64, 0x61, 0x74, 0x61, 0x12, 0x24, 0x0a, 0x09, 0x73, 0x69, 0x67, 0x6e, 0x61,
+	0x74, 0x75, 0x72, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0c, 0x42, 0x06, 0x8a, 0xb5, 0x18, 0x02,
+	0x39, 0x36, 0x52, 0x09, 0x73, 0x69, 0x67, 0x6e, 0x61, 0x74, 0x75, 0x72, 0x65, 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, 0x41, 0x74, 0x74,
+	0x65, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 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 (
@@ -777,7 +924,7 @@ func file_proto_prysm_v1alpha1_attestation_proto_rawDescGZIP() []byte {
 	return file_proto_prysm_v1alpha1_attestation_proto_rawDescData
 }
 
-var file_proto_prysm_v1alpha1_attestation_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
+var file_proto_prysm_v1alpha1_attestation_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
 var file_proto_prysm_v1alpha1_attestation_proto_goTypes = []interface{}{
 	(*SignedAggregateAttestationAndProof)(nil),        // 0: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProof
 	(*AggregateAttestationAndProof)(nil),              // 1: ethereum.eth.v1alpha1.AggregateAttestationAndProof
@@ -787,23 +934,27 @@ var file_proto_prysm_v1alpha1_attestation_proto_goTypes = []interface{}{
 	(*SignedAggregateAttestationAndProofElectra)(nil), // 5: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProofElectra
 	(*AggregateAttestationAndProofElectra)(nil),       // 6: ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra
 	(*AttestationElectra)(nil),                        // 7: ethereum.eth.v1alpha1.AttestationElectra
-	(*SingleAttestation)(nil),                         // 8: ethereum.eth.v1alpha1.SingleAttestation
+	(*SignedAggregateAttestationAndProofSingle)(nil),  // 8: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProofSingle
+	(*AggregateAttestationAndProofSingle)(nil),        // 9: ethereum.eth.v1alpha1.AggregateAttestationAndProofSingle
+	(*SingleAttestation)(nil),                         // 10: ethereum.eth.v1alpha1.SingleAttestation
 }
 var file_proto_prysm_v1alpha1_attestation_proto_depIdxs = []int32{
-	1, // 0: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProof.message:type_name -> ethereum.eth.v1alpha1.AggregateAttestationAndProof
-	2, // 1: ethereum.eth.v1alpha1.AggregateAttestationAndProof.aggregate:type_name -> ethereum.eth.v1alpha1.Attestation
-	3, // 2: ethereum.eth.v1alpha1.Attestation.data:type_name -> ethereum.eth.v1alpha1.AttestationData
-	4, // 3: ethereum.eth.v1alpha1.AttestationData.source:type_name -> ethereum.eth.v1alpha1.Checkpoint
-	4, // 4: ethereum.eth.v1alpha1.AttestationData.target:type_name -> ethereum.eth.v1alpha1.Checkpoint
-	6, // 5: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProofElectra.message:type_name -> ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra
-	7, // 6: ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra.aggregate:type_name -> ethereum.eth.v1alpha1.AttestationElectra
-	3, // 7: ethereum.eth.v1alpha1.AttestationElectra.data:type_name -> ethereum.eth.v1alpha1.AttestationData
-	3, // 8: ethereum.eth.v1alpha1.SingleAttestation.data:type_name -> ethereum.eth.v1alpha1.AttestationData
-	9, // [9:9] is the sub-list for method output_type
-	9, // [9:9] is the sub-list for method input_type
-	9, // [9:9] is the sub-list for extension type_name
-	9, // [9:9] is the sub-list for extension extendee
-	0, // [0:9] is the sub-list for field type_name
+	1,  // 0: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProof.message:type_name -> ethereum.eth.v1alpha1.AggregateAttestationAndProof
+	2,  // 1: ethereum.eth.v1alpha1.AggregateAttestationAndProof.aggregate:type_name -> ethereum.eth.v1alpha1.Attestation
+	3,  // 2: ethereum.eth.v1alpha1.Attestation.data:type_name -> ethereum.eth.v1alpha1.AttestationData
+	4,  // 3: ethereum.eth.v1alpha1.AttestationData.source:type_name -> ethereum.eth.v1alpha1.Checkpoint
+	4,  // 4: ethereum.eth.v1alpha1.AttestationData.target:type_name -> ethereum.eth.v1alpha1.Checkpoint
+	6,  // 5: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProofElectra.message:type_name -> ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra
+	7,  // 6: ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra.aggregate:type_name -> ethereum.eth.v1alpha1.AttestationElectra
+	3,  // 7: ethereum.eth.v1alpha1.AttestationElectra.data:type_name -> ethereum.eth.v1alpha1.AttestationData
+	9,  // 8: ethereum.eth.v1alpha1.SignedAggregateAttestationAndProofSingle.message:type_name -> ethereum.eth.v1alpha1.AggregateAttestationAndProofSingle
+	10, // 9: ethereum.eth.v1alpha1.AggregateAttestationAndProofSingle.aggregate:type_name -> ethereum.eth.v1alpha1.SingleAttestation
+	3,  // 10: ethereum.eth.v1alpha1.SingleAttestation.data:type_name -> ethereum.eth.v1alpha1.AttestationData
+	11, // [11:11] is the sub-list for method output_type
+	11, // [11:11] is the sub-list for method input_type
+	11, // [11:11] is the sub-list for extension type_name
+	11, // [11:11] is the sub-list for extension extendee
+	0,  // [0:11] is the sub-list for field type_name
 }
 
 func init() { file_proto_prysm_v1alpha1_attestation_proto_init() }
@@ -909,6 +1060,30 @@ func file_proto_prysm_v1alpha1_attestation_proto_init() {
 			}
 		}
 		file_proto_prysm_v1alpha1_attestation_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignedAggregateAttestationAndProofSingle); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_attestation_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*AggregateAttestationAndProofSingle); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_attestation_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SingleAttestation); i {
 			case 0:
 				return &v.state
@@ -927,7 +1102,7 @@ func file_proto_prysm_v1alpha1_attestation_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_prysm_v1alpha1_attestation_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   9,
+			NumMessages:   11,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

proto/prysm/v1alpha1/attestation.proto

@@ -126,6 +126,25 @@ message AttestationElectra {
     bytes committee_bits = 4 [(ethereum.eth.ext.ssz_size) = "committee_bits.size", (ethereum.eth.ext.cast_type) = "committee_bits.type"];
 }
 
+message SignedAggregateAttestationAndProofSingle {
+    // The aggregated attestation and selection proof itself.
+    AggregateAttestationAndProofSingle message = 1;
+
+    // 96 byte BLS aggregate signature signed by the aggregator over the message.
+    bytes signature = 2 [(ethereum.eth.ext.ssz_size) = "96"];
+}
+
+message AggregateAttestationAndProofSingle {
+    // The aggregator index that submitted this aggregated attestation and proof.
+    uint64 aggregator_index = 1  [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"];
+
+    // The aggregated attestation that was submitted.
+    SingleAttestation aggregate = 3;
+
+    // 96 byte selection proof signed by the aggregator, which is the signature of the slot to aggregate.
+    bytes selection_proof = 2 [(ethereum.eth.ext.ssz_size) = "96"];
+}
+
 message SingleAttestation {
     uint64 committee_id = 1  [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.CommitteeIndex"];
     uint64 attester_index = 2  [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"];

proto/prysm/v1alpha1/electra.ssz.go

@@ -383,6 +383,181 @@ func (a *AttestationElectra) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	return
 }
 
+// MarshalSSZ ssz marshals the SignedAggregateAttestationAndProofSingle object
+func (s *SignedAggregateAttestationAndProofSingle) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(s)
+}
+
+// MarshalSSZTo ssz marshals the SignedAggregateAttestationAndProofSingle object to a target array
+func (s *SignedAggregateAttestationAndProofSingle) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'Message'
+	if s.Message == nil {
+		s.Message = new(AggregateAttestationAndProofSingle)
+	}
+	if dst, err = s.Message.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'Signature'
+	if size := len(s.Signature); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.Signature", size, 96)
+		return
+	}
+	dst = append(dst, s.Signature...)
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the SignedAggregateAttestationAndProofSingle object
+func (s *SignedAggregateAttestationAndProofSingle) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 440 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'Message'
+	if s.Message == nil {
+		s.Message = new(AggregateAttestationAndProofSingle)
+	}
+	if err = s.Message.UnmarshalSSZ(buf[0:344]); err != nil {
+		return err
+	}
+
+	// Field (1) 'Signature'
+	if cap(s.Signature) == 0 {
+		s.Signature = make([]byte, 0, len(buf[344:440]))
+	}
+	s.Signature = append(s.Signature, buf[344:440]...)
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the SignedAggregateAttestationAndProofSingle object
+func (s *SignedAggregateAttestationAndProofSingle) SizeSSZ() (size int) {
+	size = 440
+	return
+}
+
+// HashTreeRoot ssz hashes the SignedAggregateAttestationAndProofSingle object
+func (s *SignedAggregateAttestationAndProofSingle) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(s)
+}
+
+// HashTreeRootWith ssz hashes the SignedAggregateAttestationAndProofSingle object with a hasher
+func (s *SignedAggregateAttestationAndProofSingle) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Message'
+	if err = s.Message.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'Signature'
+	if size := len(s.Signature); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.Signature", size, 96)
+		return
+	}
+	hh.PutBytes(s.Signature)
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the AggregateAttestationAndProofSingle object
+func (a *AggregateAttestationAndProofSingle) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(a)
+}
+
+// MarshalSSZTo ssz marshals the AggregateAttestationAndProofSingle object to a target array
+func (a *AggregateAttestationAndProofSingle) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'AggregatorIndex'
+	dst = ssz.MarshalUint64(dst, uint64(a.AggregatorIndex))
+
+	// Field (1) 'Aggregate'
+	if a.Aggregate == nil {
+		a.Aggregate = new(SingleAttestation)
+	}
+	if dst, err = a.Aggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'SelectionProof'
+	if size := len(a.SelectionProof); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.SelectionProof", size, 96)
+		return
+	}
+	dst = append(dst, a.SelectionProof...)
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the AggregateAttestationAndProofSingle object
+func (a *AggregateAttestationAndProofSingle) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 344 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'AggregatorIndex'
+	a.AggregatorIndex = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex(ssz.UnmarshallUint64(buf[0:8]))
+
+	// Field (1) 'Aggregate'
+	if a.Aggregate == nil {
+		a.Aggregate = new(SingleAttestation)
+	}
+	if err = a.Aggregate.UnmarshalSSZ(buf[8:248]); err != nil {
+		return err
+	}
+
+	// Field (2) 'SelectionProof'
+	if cap(a.SelectionProof) == 0 {
+		a.SelectionProof = make([]byte, 0, len(buf[248:344]))
+	}
+	a.SelectionProof = append(a.SelectionProof, buf[248:344]...)
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the AggregateAttestationAndProofSingle object
+func (a *AggregateAttestationAndProofSingle) SizeSSZ() (size int) {
+	size = 344
+	return
+}
+
+// HashTreeRoot ssz hashes the AggregateAttestationAndProofSingle object
+func (a *AggregateAttestationAndProofSingle) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(a)
+}
+
+// HashTreeRootWith ssz hashes the AggregateAttestationAndProofSingle object with a hasher
+func (a *AggregateAttestationAndProofSingle) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AggregatorIndex'
+	hh.PutUint64(uint64(a.AggregatorIndex))
+
+	// Field (1) 'Aggregate'
+	if err = a.Aggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'SelectionProof'
+	if size := len(a.SelectionProof); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.SelectionProof", size, 96)
+		return
+	}
+	hh.PutBytes(a.SelectionProof)
+
+	hh.Merkleize(indx)
+	return
+}
+
 // MarshalSSZ ssz marshals the SingleAttestation object
 func (s *SingleAttestation) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(s)

proto/prysm/v1alpha1/validator.pb.go

@@ -3747,7 +3747,7 @@ var file_proto_prysm_v1alpha1_validator_proto_rawDesc = []byte{
 	0x0a, 0x06, 0x45, 0x58, 0x49, 0x54, 0x45, 0x44, 0x10, 0x06, 0x12, 0x0b, 0x0a, 0x07, 0x49, 0x4e,
 	0x56, 0x41, 0x4c, 0x49, 0x44, 0x10, 0x07, 0x12, 0x17, 0x0a, 0x13, 0x50, 0x41, 0x52, 0x54, 0x49,
 	0x41, 0x4c, 0x4c, 0x59, 0x5f, 0x44, 0x45, 0x50, 0x4f, 0x53, 0x49, 0x54, 0x45, 0x44, 0x10, 0x08,
-	0x32, 0xf5, 0x28, 0x0a, 0x13, 0x42, 0x65, 0x61, 0x63, 0x6f, 0x6e, 0x4e, 0x6f, 0x64, 0x65, 0x56,
+	0x32, 0xf4, 0x28, 0x0a, 0x13, 0x42, 0x65, 0x61, 0x63, 0x6f, 0x6e, 0x4e, 0x6f, 0x64, 0x65, 0x56,
 	0x61, 0x6c, 0x69, 0x64, 0x61, 0x74, 0x6f, 0x72, 0x12, 0x80, 0x01, 0x0a, 0x09, 0x47, 0x65, 0x74,
 	0x44, 0x75, 0x74, 0x69, 0x65, 0x73, 0x12, 0x24, 0x2e, 0x65, 0x74, 0x68, 0x65, 0x72, 0x65, 0x75,
 	0x6d, 0x2e, 0x65, 0x74, 0x68, 0x2e, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x2e, 0x44,
@@ -3875,216 +3875,216 @@ var file_proto_prysm_v1alpha1_validator_proto_rawDesc = []byte{
 	0x73, 0x65, 0x22, 0x2e, 0x82, 0xd3, 0xe4, 0x93, 0x02, 0x28, 0x3a, 0x01, 0x2a, 0x22, 0x23, 0x2f,
 	0x65, 0x74, 0x68, 0x2f, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x2f, 0x76, 0x61, 0x6c,
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+	0x6f, 0x6e, 0x12, 0xa4, 0x01, 0x0a, 0x19, 0x50, 0x72, 0x6f, 0x70, 0x6f, 0x73, 0x65, 0x41, 0x74,
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+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -4169,7 +4169,7 @@ var file_proto_prysm_v1alpha1_validator_proto_goTypes = []interface{}{
 	(*emptypb.Empty)(nil),                                      // 64: google.protobuf.Empty
 	(*GenericSignedBeaconBlock)(nil),                           // 65: ethereum.eth.v1alpha1.GenericSignedBeaconBlock
 	(*Attestation)(nil),                                        // 66: ethereum.eth.v1alpha1.Attestation
-	(*AttestationElectra)(nil),                                 // 67: ethereum.eth.v1alpha1.AttestationElectra
+	(*SingleAttestation)(nil),                                  // 67: ethereum.eth.v1alpha1.SingleAttestation
 	(*SignedVoluntaryExit)(nil),                                // 68: ethereum.eth.v1alpha1.SignedVoluntaryExit
 	(*SignedContributionAndProof)(nil),                         // 69: ethereum.eth.v1alpha1.SignedContributionAndProof
 	(*SignedValidatorRegistrationsV1)(nil),                     // 70: ethereum.eth.v1alpha1.SignedValidatorRegistrationsV1
@@ -4216,7 +4216,7 @@ var file_proto_prysm_v1alpha1_validator_proto_depIdxs = []int32{
 	41, // 35: ethereum.eth.v1alpha1.BeaconNodeValidator.GetFeeRecipientByPubKey:input_type -> ethereum.eth.v1alpha1.FeeRecipientByPubKeyRequest
 	24, // 36: ethereum.eth.v1alpha1.BeaconNodeValidator.GetAttestationData:input_type -> ethereum.eth.v1alpha1.AttestationDataRequest
 	66, // 37: ethereum.eth.v1alpha1.BeaconNodeValidator.ProposeAttestation:input_type -> ethereum.eth.v1alpha1.Attestation
-	67, // 38: ethereum.eth.v1alpha1.BeaconNodeValidator.ProposeAttestationElectra:input_type -> ethereum.eth.v1alpha1.AttestationElectra
+	67, // 38: ethereum.eth.v1alpha1.BeaconNodeValidator.ProposeAttestationElectra:input_type -> ethereum.eth.v1alpha1.SingleAttestation
 	26, // 39: ethereum.eth.v1alpha1.BeaconNodeValidator.SubmitAggregateSelectionProof:input_type -> ethereum.eth.v1alpha1.AggregateSelectionRequest
 	26, // 40: ethereum.eth.v1alpha1.BeaconNodeValidator.SubmitAggregateSelectionProofElectra:input_type -> ethereum.eth.v1alpha1.AggregateSelectionRequest
 	29, // 41: ethereum.eth.v1alpha1.BeaconNodeValidator.SubmitSignedAggregateSelectionProof:input_type -> ethereum.eth.v1alpha1.SignedAggregateSubmitRequest
@@ -4939,7 +4939,7 @@ type BeaconNodeValidatorClient interface {
 	GetFeeRecipientByPubKey(ctx context.Context, in *FeeRecipientByPubKeyRequest, opts ...grpc.CallOption) (*FeeRecipientByPubKeyResponse, error)
 	GetAttestationData(ctx context.Context, in *AttestationDataRequest, opts ...grpc.CallOption) (*AttestationData, error)
 	ProposeAttestation(ctx context.Context, in *Attestation, opts ...grpc.CallOption) (*AttestResponse, error)
-	ProposeAttestationElectra(ctx context.Context, in *AttestationElectra, opts ...grpc.CallOption) (*AttestResponse, error)
+	ProposeAttestationElectra(ctx context.Context, in *SingleAttestation, opts ...grpc.CallOption) (*AttestResponse, error)
 	SubmitAggregateSelectionProof(ctx context.Context, in *AggregateSelectionRequest, opts ...grpc.CallOption) (*AggregateSelectionResponse, error)
 	SubmitAggregateSelectionProofElectra(ctx context.Context, in *AggregateSelectionRequest, opts ...grpc.CallOption) (*AggregateSelectionElectraResponse, error)
 	SubmitSignedAggregateSelectionProof(ctx context.Context, in *SignedAggregateSubmitRequest, opts ...grpc.CallOption) (*SignedAggregateSubmitResponse, error)
@@ -5134,7 +5134,7 @@ func (c *beaconNodeValidatorClient) ProposeAttestation(ctx context.Context, in *
 	return out, nil
 }
 
-func (c *beaconNodeValidatorClient) ProposeAttestationElectra(ctx context.Context, in *AttestationElectra, opts ...grpc.CallOption) (*AttestResponse, error) {
+func (c *beaconNodeValidatorClient) ProposeAttestationElectra(ctx context.Context, in *SingleAttestation, opts ...grpc.CallOption) (*AttestResponse, error) {
 	out := new(AttestResponse)
 	err := c.cc.Invoke(ctx, "/ethereum.eth.v1alpha1.BeaconNodeValidator/ProposeAttestationElectra", in, out, opts...)
 	if err != nil {
@@ -5361,7 +5361,7 @@ type BeaconNodeValidatorServer interface {
 	GetFeeRecipientByPubKey(context.Context, *FeeRecipientByPubKeyRequest) (*FeeRecipientByPubKeyResponse, error)
 	GetAttestationData(context.Context, *AttestationDataRequest) (*AttestationData, error)
 	ProposeAttestation(context.Context, *Attestation) (*AttestResponse, error)
-	ProposeAttestationElectra(context.Context, *AttestationElectra) (*AttestResponse, error)
+	ProposeAttestationElectra(context.Context, *SingleAttestation) (*AttestResponse, error)
 	SubmitAggregateSelectionProof(context.Context, *AggregateSelectionRequest) (*AggregateSelectionResponse, error)
 	SubmitAggregateSelectionProofElectra(context.Context, *AggregateSelectionRequest) (*AggregateSelectionElectraResponse, error)
 	SubmitSignedAggregateSelectionProof(context.Context, *SignedAggregateSubmitRequest) (*SignedAggregateSubmitResponse, error)
@@ -5426,7 +5426,7 @@ func (*UnimplementedBeaconNodeValidatorServer) GetAttestationData(context.Contex
 func (*UnimplementedBeaconNodeValidatorServer) ProposeAttestation(context.Context, *Attestation) (*AttestResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ProposeAttestation not implemented")
 }
-func (*UnimplementedBeaconNodeValidatorServer) ProposeAttestationElectra(context.Context, *AttestationElectra) (*AttestResponse, error) {
+func (*UnimplementedBeaconNodeValidatorServer) ProposeAttestationElectra(context.Context, *SingleAttestation) (*AttestResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method ProposeAttestationElectra not implemented")
 }
 func (*UnimplementedBeaconNodeValidatorServer) SubmitAggregateSelectionProof(context.Context, *AggregateSelectionRequest) (*AggregateSelectionResponse, error) {
@@ -5726,7 +5726,7 @@ func _BeaconNodeValidator_ProposeAttestation_Handler(srv interface{}, ctx contex
 }
 
 func _BeaconNodeValidator_ProposeAttestationElectra_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(AttestationElectra)
+	in := new(SingleAttestation)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
@@ -5738,7 +5738,7 @@ func _BeaconNodeValidator_ProposeAttestationElectra_Handler(srv interface{}, ctx
 		FullMethod: "/ethereum.eth.v1alpha1.BeaconNodeValidator/ProposeAttestationElectra",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BeaconNodeValidatorServer).ProposeAttestationElectra(ctx, req.(*AttestationElectra))
+		return srv.(BeaconNodeValidatorServer).ProposeAttestationElectra(ctx, req.(*SingleAttestation))
 	}
 	return interceptor(ctx, in, info, handler)
 }

proto/prysm/v1alpha1/validator.proto

@@ -194,7 +194,7 @@ service BeaconNodeValidator {
     // The validator sends the newly signed attestation to the beacon node for the attestation to
     // be included in the beacon chain. The beacon node is expected to validate and publish attestation on
     // appropriate committee subnet.
-    rpc ProposeAttestationElectra(AttestationElectra) returns (AttestResponse) {
+    rpc ProposeAttestationElectra(SingleAttestation) returns (AttestResponse) {
         option (google.api.http) = {
             post: "/eth/v1alpha1/validator/attestation_electra"
             body: "*"

testing/mock/beacon_service_mock.go

@@ -429,7 +429,7 @@ func (m *MockBeaconChainClient) SubmitAttesterSlashing(arg0 context.Context, arg
 	for _, a := range arg2 {
 		varargs = append(varargs, a)
 	}
-	ret := m.ctrl.Call(m, "SubmitAttesterSlashings", varargs...)
+	ret := m.ctrl.Call(m, "SubmitAttesterSlashing", varargs...)
 	ret0, _ := ret[0].(*eth.SubmitSlashingResponse)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
@@ -439,7 +439,7 @@ func (m *MockBeaconChainClient) SubmitAttesterSlashing(arg0 context.Context, arg
 func (mr *MockBeaconChainClientMockRecorder) SubmitAttesterSlashing(arg0, arg1 any, arg2 ...any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
 	varargs := append([]any{arg0, arg1}, arg2...)
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SubmitAttesterSlashings", reflect.TypeOf((*MockBeaconChainClient)(nil).SubmitAttesterSlashing), varargs...)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SubmitAttesterSlashing", reflect.TypeOf((*MockBeaconChainClient)(nil).SubmitAttesterSlashing), varargs...)
 }
 
 // SubmitAttesterSlashingElectra mocks base method.

testing/mock/beacon_validator_client_mock.go

@@ -324,7 +324,7 @@ func (mr *MockBeaconNodeValidatorClientMockRecorder) ProposeAttestation(arg0, ar
 }
 
 // ProposeAttestationElectra mocks base method.
-func (m *MockBeaconNodeValidatorClient) ProposeAttestationElectra(arg0 context.Context, arg1 *eth.AttestationElectra, arg2 ...grpc.CallOption) (*eth.AttestResponse, error) {
+func (m *MockBeaconNodeValidatorClient) ProposeAttestationElectra(arg0 context.Context, arg1 *eth.SingleAttestation, arg2 ...grpc.CallOption) (*eth.AttestResponse, error) {
 	m.ctrl.T.Helper()
 	varargs := []any{arg0, arg1}
 	for _, a := range arg2 {
@@ -786,6 +786,129 @@ func (mr *MockBeaconNodeValidator_WaitForChainStartClientMockRecorder) Trailer()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Trailer", reflect.TypeOf((*MockBeaconNodeValidator_WaitForChainStartClient)(nil).Trailer))
 }
 
+// MockBeaconNodeValidator_WaitForActivationClient is a mock of BeaconNodeValidator_WaitForActivationClient interface.
+type MockBeaconNodeValidator_WaitForActivationClient struct {
+	ctrl     *gomock.Controller
+	recorder *MockBeaconNodeValidator_WaitForActivationClientMockRecorder
+}
+
+// MockBeaconNodeValidator_WaitForActivationClientMockRecorder is the mock recorder for MockBeaconNodeValidator_WaitForActivationClient.
+type MockBeaconNodeValidator_WaitForActivationClientMockRecorder struct {
+	mock *MockBeaconNodeValidator_WaitForActivationClient
+}
+
+// NewMockBeaconNodeValidator_WaitForActivationClient creates a new mock instance.
+func NewMockBeaconNodeValidator_WaitForActivationClient(ctrl *gomock.Controller) *MockBeaconNodeValidator_WaitForActivationClient {
+	mock := &MockBeaconNodeValidator_WaitForActivationClient{ctrl: ctrl}
+	mock.recorder = &MockBeaconNodeValidator_WaitForActivationClientMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) EXPECT() *MockBeaconNodeValidator_WaitForActivationClientMockRecorder {
+	return m.recorder
+}
+
+// CloseSend mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) CloseSend() error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CloseSend")
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// CloseSend indicates an expected call of CloseSend.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) CloseSend() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CloseSend", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).CloseSend))
+}
+
+// Context mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) Context() context.Context {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Context")
+	ret0, _ := ret[0].(context.Context)
+	return ret0
+}
+
+// Context indicates an expected call of Context.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) Context() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Context", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).Context))
+}
+
+// Header mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) Header() (metadata.MD, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Header")
+	ret0, _ := ret[0].(metadata.MD)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Header indicates an expected call of Header.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) Header() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Header", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).Header))
+}
+
+// Recv mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) Recv() (*eth.ValidatorActivationResponse, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Recv")
+	ret0, _ := ret[0].(*eth.ValidatorActivationResponse)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Recv indicates an expected call of Recv.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) Recv() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Recv", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).Recv))
+}
+
+// RecvMsg mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) RecvMsg(arg0 any) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "RecvMsg", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// RecvMsg indicates an expected call of RecvMsg.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) RecvMsg(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "RecvMsg", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).RecvMsg), arg0)
+}
+
+// SendMsg mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) SendMsg(arg0 any) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "SendMsg", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// SendMsg indicates an expected call of SendMsg.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) SendMsg(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SendMsg", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).SendMsg), arg0)
+}
+
+// Trailer mocks base method.
+func (m *MockBeaconNodeValidator_WaitForActivationClient) Trailer() metadata.MD {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Trailer")
+	ret0, _ := ret[0].(metadata.MD)
+	return ret0
+}
+
+// Trailer indicates an expected call of Trailer.
+func (mr *MockBeaconNodeValidator_WaitForActivationClientMockRecorder) Trailer() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Trailer", reflect.TypeOf((*MockBeaconNodeValidator_WaitForActivationClient)(nil).Trailer))
+}
+
 // MockBeaconNodeValidator_StreamSlotsClient is a mock of BeaconNodeValidator_StreamSlotsClient interface.
 type MockBeaconNodeValidator_StreamSlotsClient struct {
 	ctrl     *gomock.Controller

testing/mock/beacon_validator_server_mock.go

@@ -253,7 +253,7 @@ func (mr *MockBeaconNodeValidatorServerMockRecorder) ProposeAttestation(arg0, ar
 }
 
 // ProposeAttestationElectra mocks base method.
-func (m *MockBeaconNodeValidatorServer) ProposeAttestationElectra(arg0 context.Context, arg1 *eth.AttestationElectra) (*eth.AttestResponse, error) {
+func (m *MockBeaconNodeValidatorServer) ProposeAttestationElectra(arg0 context.Context, arg1 *eth.SingleAttestation) (*eth.AttestResponse, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "ProposeAttestationElectra", arg0, arg1)
 	ret0, _ := ret[0].(*eth.AttestResponse)

testing/validator-mock/validator_client_mock.go

@@ -181,7 +181,7 @@ func (mr *MockValidatorClientMockRecorder) FeeRecipientByPubKey(arg0, arg1 any)
 // Host mocks base method.
 func (m *MockValidatorClient) Host() string {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "HTTPHost")
+	ret := m.ctrl.Call(m, "Host")
 	ret0, _ := ret[0].(string)
 	return ret0
 }
@@ -189,7 +189,7 @@ func (m *MockValidatorClient) Host() string {
 // Host indicates an expected call of Host.
 func (mr *MockValidatorClientMockRecorder) Host() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "HTTPHost", reflect.TypeOf((*MockValidatorClient)(nil).Host))
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Host", reflect.TypeOf((*MockValidatorClient)(nil).Host))
 }
 
 // MultipleValidatorStatus mocks base method.
@@ -238,7 +238,7 @@ func (mr *MockValidatorClientMockRecorder) ProposeAttestation(arg0, arg1 any) *g
 }
 
 // ProposeAttestationElectra mocks base method.
-func (m *MockValidatorClient) ProposeAttestationElectra(arg0 context.Context, arg1 *eth.AttestationElectra) (*eth.AttestResponse, error) {
+func (m *MockValidatorClient) ProposeAttestationElectra(arg0 context.Context, arg1 *eth.SingleAttestation) (*eth.AttestResponse, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "ProposeAttestationElectra", arg0, arg1)
 	ret0, _ := ret[0].(*eth.AttestResponse)
@@ -501,21 +501,6 @@ func (mr *MockValidatorClientMockRecorder) ValidatorStatus(arg0, arg1 any) *gomo
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ValidatorStatus", reflect.TypeOf((*MockValidatorClient)(nil).ValidatorStatus), arg0, arg1)
 }
 
-// WaitForActivation mocks base method.
-func (m *MockValidatorClient) WaitForActivation(arg0 context.Context, arg1 *eth.ValidatorActivationRequest) (eth.BeaconNodeValidator_WaitForActivationClient, error) {
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "WaitForActivation", arg0, arg1)
-	ret0, _ := ret[0].(eth.BeaconNodeValidator_WaitForActivationClient)
-	ret1, _ := ret[1].(error)
-	return ret0, ret1
-}
-
-// WaitForActivation indicates an expected call of WaitForActivation.
-func (mr *MockValidatorClientMockRecorder) WaitForActivation(arg0, arg1 any) *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "WaitForActivation", reflect.TypeOf((*MockValidatorClient)(nil).WaitForActivation), arg0, arg1)
-}
-
 // WaitForChainStart mocks base method.
 func (m *MockValidatorClient) WaitForChainStart(arg0 context.Context, arg1 *emptypb.Empty) (*eth.ChainStartResponse, error) {
 	m.ctrl.T.Helper()

validator/client/attest.go

@@ -122,23 +122,6 @@ func (v *validator) SubmitAttestation(ctx context.Context, slot primitives.Slot,
 		return
 	}
 
-	var indexInCommittee uint64
-	var found bool
-	for i, vID := range duty.Committee {
-		if vID == duty.ValidatorIndex {
-			indexInCommittee = uint64(i)
-			found = true
-			break
-		}
-	}
-	if !found {
-		log.Errorf("Validator ID %d not found in committee of %v", duty.ValidatorIndex, duty.Committee)
-		if v.emitAccountMetrics {
-			ValidatorAttestFailVec.WithLabelValues(fmtKey).Inc()
-		}
-		return
-	}
-
 	// TODO: Extend to Electra
 	phase0Att, ok := indexedAtt.(*ethpb.IndexedAttestation)
 	if ok {
@@ -153,21 +136,36 @@ func (v *validator) SubmitAttestation(ctx context.Context, slot primitives.Slot,
 		}
 	}
 
-	aggregationBitfield := bitfield.NewBitlist(uint64(len(duty.Committee)))
-	aggregationBitfield.SetBitAt(indexInCommittee, true)
-	committeeBits := primitives.NewAttestationCommitteeBits()
+	var aggregationBitfield bitfield.Bitlist
 
 	var attResp *ethpb.AttestResponse
 	if postElectra {
-		attestation := &ethpb.AttestationElectra{
-			Data:            data,
-			AggregationBits: aggregationBitfield,
-			CommitteeBits:   committeeBits,
-			Signature:       sig,
+		attestation := &ethpb.SingleAttestation{
+			Data:          data,
+			AttesterIndex: duty.ValidatorIndex,
+			CommitteeId:   duty.CommitteeIndex,
+			Signature:     sig,
 		}
-		attestation.CommitteeBits.SetBitAt(uint64(req.CommitteeIndex), true)
 		attResp, err = v.validatorClient.ProposeAttestationElectra(ctx, attestation)
 	} else {
+		var indexInCommittee uint64
+		var found bool
+		for i, vID := range duty.Committee {
+			if vID == duty.ValidatorIndex {
+				indexInCommittee = uint64(i)
+				found = true
+				break
+			}
+		}
+		if !found {
+			log.Errorf("Validator ID %d not found in committee of %v", duty.ValidatorIndex, duty.Committee)
+			if v.emitAccountMetrics {
+				ValidatorAttestFailVec.WithLabelValues(fmtKey).Inc()
+			}
+			return
+		}
+		aggregationBitfield = bitfield.NewBitlist(uint64(len(duty.Committee)))
+		aggregationBitfield.SetBitAt(indexInCommittee, true)
 		attestation := &ethpb.Attestation{
 			Data:            data,
 			AggregationBits: aggregationBitfield,
@@ -199,11 +197,12 @@ func (v *validator) SubmitAttestation(ctx context.Context, slot primitives.Slot,
 		trace.StringAttribute("blockRoot", fmt.Sprintf("%#x", data.BeaconBlockRoot)),
 		trace.Int64Attribute("justifiedEpoch", int64(data.Source.Epoch)),
 		trace.Int64Attribute("targetEpoch", int64(data.Target.Epoch)),
-		trace.StringAttribute("aggregationBitfield", fmt.Sprintf("%#x", aggregationBitfield)),
 	)
 	if postElectra {
-		span.SetAttributes(trace.StringAttribute("committeeBitfield", fmt.Sprintf("%#x", committeeBits)))
+		span.SetAttributes(trace.Int64Attribute("attesterIndex", int64(duty.ValidatorIndex)))
+		span.SetAttributes(trace.Int64Attribute("committeeIndex", int64(duty.CommitteeIndex)))
 	} else {
+		span.SetAttributes(trace.StringAttribute("aggregationBitfield", fmt.Sprintf("%#x", aggregationBitfield)))
 		span.SetAttributes(trace.Int64Attribute("committeeIndex", int64(data.CommitteeIndex)))
 	}
 

validator/client/attest_test.go

@@ -222,11 +222,11 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 				gomock.Any(), // epoch
 			).Times(2).Return(&ethpb.DomainResponse{SignatureDomain: make([]byte, 32)}, nil /*err*/)
 
-			var generatedAttestation *ethpb.AttestationElectra
+			var generatedAttestation *ethpb.SingleAttestation
 			m.validatorClient.EXPECT().ProposeAttestationElectra(
 				gomock.Any(), // ctx
-				gomock.AssignableToTypeOf(&ethpb.AttestationElectra{}),
-			).Do(func(_ context.Context, att *ethpb.AttestationElectra) {
+				gomock.AssignableToTypeOf(&ethpb.SingleAttestation{}),
+			).Do(func(_ context.Context, att *ethpb.SingleAttestation) {
 				generatedAttestation = att
 			}).Return(&ethpb.AttestResponse{}, nil /* error */)
 
@@ -236,15 +236,15 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 			aggregationBitfield.SetBitAt(4, true)
 			committeeBits := primitives.NewAttestationCommitteeBits()
 			committeeBits.SetBitAt(5, true)
-			expectedAttestation := &ethpb.AttestationElectra{
+			expectedAttestation := &ethpb.SingleAttestation{
 				Data: &ethpb.AttestationData{
 					BeaconBlockRoot: beaconBlockRoot[:],
 					Target:          &ethpb.Checkpoint{Root: targetRoot[:]},
 					Source:          &ethpb.Checkpoint{Root: sourceRoot[:], Epoch: 3},
 				},
-				AggregationBits: aggregationBitfield,
-				CommitteeBits:   committeeBits,
-				Signature:       make([]byte, 96),
+				AttesterIndex: validatorIndex,
+				CommitteeId:   5,
+				Signature:     make([]byte, 96),
 			}
 
 			root, err := signing.ComputeSigningRoot(expectedAttestation.Data, make([]byte, 32))

validator/client/beacon-api/BUILD.bazel

@@ -122,6 +122,7 @@ go_test(
     deps = [
         "//api:go_default_library",
         "//api/server/structs:go_default_library",
+        "//beacon-chain/core/helpers:go_default_library",
         "//beacon-chain/rpc/eth/shared/testing:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",

validator/client/beacon-api/beacon_api_validator_client.go

@@ -154,7 +154,7 @@ func (c *beaconApiValidatorClient) ProposeAttestation(ctx context.Context, in *e
 	})
 }
 
-func (c *beaconApiValidatorClient) ProposeAttestationElectra(ctx context.Context, in *ethpb.AttestationElectra) (*ethpb.AttestResponse, error) {
+func (c *beaconApiValidatorClient) ProposeAttestationElectra(ctx context.Context, in *ethpb.SingleAttestation) (*ethpb.AttestResponse, error) {
 	ctx, span := trace.StartSpan(ctx, "beacon-api.ProposeAttestationElectra")
 	defer span.End()
 

validator/client/beacon-api/beacon_block_json_helpers.go

@@ -51,10 +51,10 @@ func jsonifyAttestations(attestations []*ethpb.Attestation) []*structs.Attestati
 	return jsonAttestations
 }
 
-func jsonifyAttestationsElectra(attestations []*ethpb.AttestationElectra) []*structs.AttestationElectra {
-	jsonAttestations := make([]*structs.AttestationElectra, len(attestations))
+func jsonifySingleAttestations(attestations []*ethpb.SingleAttestation) []*structs.SingleAttestation {
+	jsonAttestations := make([]*structs.SingleAttestation, len(attestations))
 	for index, attestation := range attestations {
-		jsonAttestations[index] = jsonifyAttestationElectra(attestation)
+		jsonAttestations[index] = jsonifySingleAttestation(attestation)
 	}
 	return jsonAttestations
 }
@@ -181,6 +181,15 @@ func jsonifyAttestationElectra(attestation *ethpb.AttestationElectra) *structs.A
 	}
 }
 
+func jsonifySingleAttestation(attestation *ethpb.SingleAttestation) *structs.SingleAttestation {
+	return &structs.SingleAttestation{
+		CommitteeIndex: uint64ToString(attestation.CommitteeId),
+		AttesterIndex:  uint64ToString(attestation.AttesterIndex),
+		Data:           jsonifyAttestationData(attestation.Data),
+		Signature:      hexutil.Encode(attestation.Signature),
+	}
+}
+
 func jsonifySignedAggregateAndProof(signedAggregateAndProof *ethpb.SignedAggregateAttestationAndProof) *structs.SignedAggregateAttestationAndProof {
 	return &structs.SignedAggregateAttestationAndProof{
 		Message: &structs.AggregateAttestationAndProof{

validator/client/beacon-api/mock/json_rest_handler_mock.go

@@ -58,7 +58,7 @@ func (mr *MockJsonRestHandlerMockRecorder) Get(ctx, endpoint, resp any) *gomock.
 // Host mocks base method.
 func (m *MockJsonRestHandler) Host() string {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "HTTPHost")
+	ret := m.ctrl.Call(m, "Host")
 	ret0, _ := ret[0].(string)
 	return ret0
 }
@@ -66,7 +66,7 @@ func (m *MockJsonRestHandler) Host() string {
 // Host indicates an expected call of Host.
 func (mr *MockJsonRestHandlerMockRecorder) Host() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "HTTPHost", reflect.TypeOf((*MockJsonRestHandler)(nil).Host))
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Host", reflect.TypeOf((*MockJsonRestHandler)(nil).Host))
 }
 
 // HttpClient mocks base method.

validator/client/beacon-api/propose_attestation.go

@@ -7,13 +7,14 @@ import (
 	"net/http"
 
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/network/httputil"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 )
 
 func (c *beaconApiValidatorClient) proposeAttestation(ctx context.Context, attestation *ethpb.Attestation) (*ethpb.AttestResponse, error) {
-	if err := validateNilAttestation(attestation); err != nil {
+	if err := helpers.ValidateNilAttestation(attestation); err != nil {
 		return nil, err
 	}
 	marshalledAttestation, err := json.Marshal(jsonifyAttestations([]*ethpb.Attestation{attestation}))
@@ -58,11 +59,11 @@ func (c *beaconApiValidatorClient) proposeAttestation(ctx context.Context, attes
 	return &ethpb.AttestResponse{AttestationDataRoot: attestationDataRoot[:]}, nil
 }
 
-func (c *beaconApiValidatorClient) proposeAttestationElectra(ctx context.Context, attestation *ethpb.AttestationElectra) (*ethpb.AttestResponse, error) {
-	if err := validateNilAttestation(attestation); err != nil {
+func (c *beaconApiValidatorClient) proposeAttestationElectra(ctx context.Context, attestation *ethpb.SingleAttestation) (*ethpb.AttestResponse, error) {
+	if err := helpers.ValidateNilAttestation(attestation); err != nil {
 		return nil, err
 	}
-	marshalledAttestation, err := json.Marshal(jsonifyAttestationsElectra([]*ethpb.AttestationElectra{attestation}))
+	marshalledAttestation, err := json.Marshal(jsonifySingleAttestations([]*ethpb.SingleAttestation{attestation}))
 	if err != nil {
 		return nil, err
 	}
@@ -84,28 +85,3 @@ func (c *beaconApiValidatorClient) proposeAttestationElectra(ctx context.Context
 
 	return &ethpb.AttestResponse{AttestationDataRoot: attestationDataRoot[:]}, nil
 }
-
-func validateNilAttestation(attestation ethpb.Att) error {
-	if attestation == nil || attestation.IsNil() {
-		return errors.New("attestation can't be nil")
-	}
-	if attestation.GetData().Source == nil {
-		return errors.New("attestation's source can't be nil")
-	}
-	if attestation.GetData().Target == nil {
-		return errors.New("attestation's target can't be nil")
-	}
-	v := attestation.Version()
-	if len(attestation.GetAggregationBits()) == 0 {
-		return errors.New("attestation's bitfield can't be nil")
-	}
-	if len(attestation.GetSignature()) == 0 {
-		return errors.New("attestation signature can't be nil")
-	}
-	if v >= version.Electra {
-		if len(attestation.CommitteeBitsVal().BitIndices()) == 0 {
-			return errors.New("attestation committee bits can't be nil")
-		}
-	}
-	return nil
-}

validator/client/beacon-api/propose_attestation_test.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"testing"
 
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/network/httputil"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
@@ -51,7 +52,7 @@ func TestProposeAttestation(t *testing.T) {
 		},
 		{
 			name:                 "nil attestation",
-			expectedErrorMessage: "attestation can't be nil",
+			expectedErrorMessage: "attestation is nil",
 		},
 		{
 			name: "nil attestation data",
@@ -59,7 +60,7 @@ func TestProposeAttestation(t *testing.T) {
 				AggregationBits: testhelpers.FillByteSlice(4, 74),
 				Signature:       testhelpers.FillByteSlice(96, 82),
 			},
-			expectedErrorMessage: "attestation can't be nil",
+			expectedErrorMessage: "attestation is nil",
 		},
 		{
 			name: "nil source checkpoint",
@@ -94,17 +95,6 @@ func TestProposeAttestation(t *testing.T) {
 			},
 			expectedErrorMessage: "attestation's bitfield can't be nil",
 		},
-		{
-			name: "nil signature",
-			attestation: &ethpb.Attestation{
-				AggregationBits: testhelpers.FillByteSlice(4, 74),
-				Data: &ethpb.AttestationData{
-					Source: &ethpb.Checkpoint{},
-					Target: &ethpb.Checkpoint{},
-				},
-			},
-			expectedErrorMessage: "attestation signature can't be nil",
-		},
 		{
 			name:                 "bad request",
 			attestation:          attestation,
@@ -120,7 +110,7 @@ func TestProposeAttestation(t *testing.T) {
 			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 
 			var marshalledAttestations []byte
-			if validateNilAttestation(test.attestation) == nil {
+			if helpers.ValidateNilAttestation(test.attestation) == nil {
 				b, err := json.Marshal(jsonifyAttestations([]*ethpb.Attestation{test.attestation}))
 				require.NoError(t, err)
 				marshalledAttestations = b
@@ -181,7 +171,7 @@ func TestProposeAttestationFallBack(t *testing.T) {
 	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 
 	var marshalledAttestations []byte
-	if validateNilAttestation(attestation) == nil {
+	if helpers.ValidateNilAttestation(attestation) == nil {
 		b, err := json.Marshal(jsonifyAttestations([]*ethpb.Attestation{attestation}))
 		require.NoError(t, err)
 		marshalledAttestations = b
@@ -225,8 +215,8 @@ func TestProposeAttestationFallBack(t *testing.T) {
 }
 
 func TestProposeAttestationElectra(t *testing.T) {
-	attestation := &ethpb.AttestationElectra{
-		AggregationBits: testhelpers.FillByteSlice(4, 74),
+	attestation := &ethpb.SingleAttestation{
+		AttesterIndex: 74,
 		Data: &ethpb.AttestationData{
 			Slot:            75,
 			CommitteeIndex:  76,
@@ -240,13 +230,13 @@ func TestProposeAttestationElectra(t *testing.T) {
 				Root:  testhelpers.FillByteSlice(32, 81),
 			},
 		},
-		Signature:     testhelpers.FillByteSlice(96, 82),
-		CommitteeBits: testhelpers.FillByteSlice(8, 83),
+		Signature:   testhelpers.FillByteSlice(96, 82),
+		CommitteeId: 83,
 	}
 
 	tests := []struct {
 		name                 string
-		attestation          *ethpb.AttestationElectra
+		attestation          *ethpb.SingleAttestation
 		expectedErrorMessage string
 		endpointError        error
 		endpointCall         int
@@ -258,86 +248,41 @@ func TestProposeAttestationElectra(t *testing.T) {
 		},
 		{
 			name:                 "nil attestation",
-			expectedErrorMessage: "attestation can't be nil",
+			expectedErrorMessage: "attestation is nil",
 		},
 		{
 			name: "nil attestation data",
-			attestation: &ethpb.AttestationElectra{
-				AggregationBits: testhelpers.FillByteSlice(4, 74),
-				Signature:       testhelpers.FillByteSlice(96, 82),
-				CommitteeBits:   testhelpers.FillByteSlice(8, 83),
+			attestation: &ethpb.SingleAttestation{
+				AttesterIndex: 74,
+				Signature:     testhelpers.FillByteSlice(96, 82),
+				CommitteeId:   83,
 			},
-			expectedErrorMessage: "attestation can't be nil",
+			expectedErrorMessage: "attestation is nil",
 		},
 		{
 			name: "nil source checkpoint",
-			attestation: &ethpb.AttestationElectra{
-				AggregationBits: testhelpers.FillByteSlice(4, 74),
+			attestation: &ethpb.SingleAttestation{
+				AttesterIndex: 74,
 				Data: &ethpb.AttestationData{
 					Target: &ethpb.Checkpoint{},
 				},
-				Signature:     testhelpers.FillByteSlice(96, 82),
-				CommitteeBits: testhelpers.FillByteSlice(8, 83),
+				Signature:   testhelpers.FillByteSlice(96, 82),
+				CommitteeId: 83,
 			},
 			expectedErrorMessage: "attestation's source can't be nil",
 		},
 		{
 			name: "nil target checkpoint",
-			attestation: &ethpb.AttestationElectra{
-				AggregationBits: testhelpers.FillByteSlice(4, 74),
+			attestation: &ethpb.SingleAttestation{
+				AttesterIndex: 74,
 				Data: &ethpb.AttestationData{
 					Source: &ethpb.Checkpoint{},
 				},
-				Signature:     testhelpers.FillByteSlice(96, 82),
-				CommitteeBits: testhelpers.FillByteSlice(8, 83),
+				Signature:   testhelpers.FillByteSlice(96, 82),
+				CommitteeId: 83,
 			},
 			expectedErrorMessage: "attestation's target can't be nil",
 		},
-		{
-			name: "nil aggregation bits",
-			attestation: &ethpb.AttestationElectra{
-				Data: &ethpb.AttestationData{
-					Source: &ethpb.Checkpoint{},
-					Target: &ethpb.Checkpoint{},
-				},
-				Signature:     testhelpers.FillByteSlice(96, 82),
-				CommitteeBits: testhelpers.FillByteSlice(8, 83),
-			},
-			expectedErrorMessage: "attestation's bitfield can't be nil",
-		},
-		{
-			name: "nil signature",
-			attestation: &ethpb.AttestationElectra{
-				AggregationBits: testhelpers.FillByteSlice(4, 74),
-				Data: &ethpb.AttestationData{
-					Source: &ethpb.Checkpoint{},
-					Target: &ethpb.Checkpoint{},
-				},
-				CommitteeBits: testhelpers.FillByteSlice(8, 83),
-			},
-			expectedErrorMessage: "attestation signature can't be nil",
-		},
-		{
-			name: "nil committee bits",
-			attestation: &ethpb.AttestationElectra{
-				AggregationBits: testhelpers.FillByteSlice(4, 74),
-				Data: &ethpb.AttestationData{
-					Slot:            75,
-					CommitteeIndex:  76,
-					BeaconBlockRoot: testhelpers.FillByteSlice(32, 38),
-					Source: &ethpb.Checkpoint{
-						Epoch: 78,
-						Root:  testhelpers.FillByteSlice(32, 79),
-					},
-					Target: &ethpb.Checkpoint{
-						Epoch: 80,
-						Root:  testhelpers.FillByteSlice(32, 81),
-					},
-				},
-				Signature: testhelpers.FillByteSlice(96, 82),
-			},
-			expectedErrorMessage: "attestation committee bits can't be nil",
-		},
 		{
 			name:                 "bad request",
 			attestation:          attestation,
@@ -353,8 +298,8 @@ func TestProposeAttestationElectra(t *testing.T) {
 			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
 
 			var marshalledAttestations []byte
-			if validateNilAttestation(test.attestation) == nil {
-				b, err := json.Marshal(jsonifyAttestationsElectra([]*ethpb.AttestationElectra{test.attestation}))
+			if helpers.ValidateNilAttestation(test.attestation) == nil {
+				b, err := json.Marshal(jsonifySingleAttestations([]*ethpb.SingleAttestation{test.attestation}))
 				require.NoError(t, err)
 				marshalledAttestations = b
 			}

validator/client/grpc-api/grpc_validator_client.go

@@ -71,7 +71,7 @@ func (c *grpcValidatorClient) ProposeAttestation(ctx context.Context, in *ethpb.
 	return c.beaconNodeValidatorClient.ProposeAttestation(ctx, in)
 }
 
-func (c *grpcValidatorClient) ProposeAttestationElectra(ctx context.Context, in *ethpb.AttestationElectra) (*ethpb.AttestResponse, error) {
+func (c *grpcValidatorClient) ProposeAttestationElectra(ctx context.Context, in *ethpb.SingleAttestation) (*ethpb.AttestResponse, error) {
 	return c.beaconNodeValidatorClient.ProposeAttestationElectra(ctx, in)
 }
 

validator/client/iface/validator_client.go

@@ -133,7 +133,7 @@ type ValidatorClient interface {
 	FeeRecipientByPubKey(ctx context.Context, in *ethpb.FeeRecipientByPubKeyRequest) (*ethpb.FeeRecipientByPubKeyResponse, error)
 	AttestationData(ctx context.Context, in *ethpb.AttestationDataRequest) (*ethpb.AttestationData, error)
 	ProposeAttestation(ctx context.Context, in *ethpb.Attestation) (*ethpb.AttestResponse, error)
-	ProposeAttestationElectra(ctx context.Context, in *ethpb.AttestationElectra) (*ethpb.AttestResponse, error)
+	ProposeAttestationElectra(ctx context.Context, in *ethpb.SingleAttestation) (*ethpb.AttestResponse, error)
 	SubmitAggregateSelectionProof(ctx context.Context, in *ethpb.AggregateSelectionRequest, index primitives.ValidatorIndex, committeeLength uint64) (*ethpb.AggregateSelectionResponse, error)
 	SubmitAggregateSelectionProofElectra(ctx context.Context, in *ethpb.AggregateSelectionRequest, _ primitives.ValidatorIndex, _ uint64) (*ethpb.AggregateSelectionElectraResponse, error)
 	SubmitSignedAggregateSelectionProof(ctx context.Context, in *ethpb.SignedAggregateSubmitRequest) (*ethpb.SignedAggregateSubmitResponse, error)