recover from panics when writing the event stream (#14545)

* recover from panics when writing the event stream

---------

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>
(cherry picked from commit 1086bdf2b3)

CHANGELOG.md

@@ -14,11 +14,14 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - Light client support: Add light client database changes.
 - Light client support: Implement capella and deneb changes.
 - Light client support: Implement `BlockToLightClientHeader` function.
+- Light client support: Consensus types.
 - GetBeaconStateV2: add Electra case.
 - Implement [consensus-specs/3875](https://github.com/ethereum/consensus-specs/pull/3875)
 - Tests to ensure sepolia config matches the official upstream yaml
 - HTTP endpoint for PublishBlobs
 - GetBlockV2, GetBlindedBlock, ProduceBlockV2, ProduceBlockV3: add Electra case.
+- Add Electra support and tests for light client functions
+- fastssz version bump (better error messages).
 - SSE implementation that sheds stuck clients. [pr](https://github.com/prysmaticlabs/prysm/pull/14413)
 
 ### Changed
@@ -47,6 +50,8 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - Update light client helper functions to reference `dev` branch of CL specs
 - Updated Libp2p Dependencies to allow prysm to use gossipsub v1.2 .
 - Updated Sepolia bootnodes.
+- Make committee aware packing the default by deprecating `--enable-committee-aware-packing`.
+- Moved `ConvertKzgCommitmentToVersionedHash` to the `primitives` package.
 
 ### Deprecated
 - `--disable-grpc-gateway` flag is deprecated due to grpc gateway removal.

beacon-chain/blockchain/execution_engine.go

@@ -2,7 +2,6 @@ package blockchain
 
 import (
 	"context"
-	"crypto/sha256"
 	"fmt"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -28,8 +27,6 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-const blobCommitmentVersionKZG uint8 = 0x01
-
 var defaultLatestValidHash = bytesutil.PadTo([]byte{0xff}, 32)
 
 // notifyForkchoiceUpdate signals execution engine the fork choice updates. Execution engine should:
@@ -402,13 +399,7 @@ func kzgCommitmentsToVersionedHashes(body interfaces.ReadOnlyBeaconBlockBody) ([
 
 	versionedHashes := make([]common.Hash, len(commitments))
 	for i, commitment := range commitments {
-		versionedHashes[i] = ConvertKzgCommitmentToVersionedHash(commitment)
+		versionedHashes[i] = primitives.ConvertKzgCommitmentToVersionedHash(commitment)
 	}
 	return versionedHashes, nil
 }
-
-func ConvertKzgCommitmentToVersionedHash(commitment []byte) common.Hash {
-	versionedHash := sha256.Sum256(commitment)
-	versionedHash[0] = blobCommitmentVersionKZG
-	return versionedHash
-}

beacon-chain/core/light-client/lightclient.go

@@ -243,8 +243,8 @@ func createDefaultLightClientUpdate() (*ethpbv2.LightClientUpdate, error) {
 		Pubkeys:         pubKeys,
 		AggregatePubkey: make([]byte, fieldparams.BLSPubkeyLength),
 	}
-	nextSyncCommitteeBranch := make([][]byte, fieldparams.NextSyncCommitteeBranchDepth)
-	for i := 0; i < fieldparams.NextSyncCommitteeBranchDepth; i++ {
+	nextSyncCommitteeBranch := make([][]byte, fieldparams.SyncCommitteeBranchDepth)
+	for i := 0; i < fieldparams.SyncCommitteeBranchDepth; i++ {
 		nextSyncCommitteeBranch[i] = make([]byte, fieldparams.RootLength)
 	}
 	executionBranch := make([][]byte, executionBranchNumOfLeaves)
@@ -321,10 +321,10 @@ func BlockToLightClientHeader(block interfaces.ReadOnlySignedBeaconBlock) (*ethp
 				HeaderCapella: capellaHeader,
 			},
 		}, nil
-	case version.Deneb:
+	case version.Deneb, version.Electra:
 		denebHeader, err := blockToLightClientHeaderDeneb(context.Background(), block)
 		if err != nil {
-			return nil, errors.Wrap(err, "could not get deneb header")
+			return nil, errors.Wrap(err, "could not get header")
 		}
 		return &ethpbv2.LightClientHeaderContainer{
 			Header: &ethpbv2.LightClientHeaderContainer_HeaderDeneb{
@@ -337,7 +337,7 @@ func BlockToLightClientHeader(block interfaces.ReadOnlySignedBeaconBlock) (*ethp
 }
 
 func blockToLightClientHeaderAltair(block interfaces.ReadOnlySignedBeaconBlock) (*ethpbv2.LightClientHeader, error) {
-	if block.Version() != version.Altair {
+	if block.Version() < version.Altair {
 		return nil, fmt.Errorf("block version is %s instead of Altair", version.String(block.Version()))
 	}
 
@@ -360,7 +360,7 @@ func blockToLightClientHeaderAltair(block interfaces.ReadOnlySignedBeaconBlock)
 }
 
 func blockToLightClientHeaderCapella(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock) (*ethpbv2.LightClientHeaderCapella, error) {
-	if block.Version() != version.Capella {
+	if block.Version() < version.Capella {
 		return nil, fmt.Errorf("block version is %s instead of Capella", version.String(block.Version()))
 	}
 
@@ -422,8 +422,8 @@ func blockToLightClientHeaderCapella(ctx context.Context, block interfaces.ReadO
 }
 
 func blockToLightClientHeaderDeneb(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock) (*ethpbv2.LightClientHeaderDeneb, error) {
-	if block.Version() != version.Deneb {
-		return nil, fmt.Errorf("block version is %s instead of Deneb", version.String(block.Version()))
+	if block.Version() < version.Deneb {
+		return nil, fmt.Errorf("block version is %s instead of Deneb/Electra", version.String(block.Version()))
 	}
 
 	payload, err := block.Block().Body().Execution()

beacon-chain/core/light-client/lightclient_test.go

@@ -599,4 +599,130 @@ func TestLightClient_BlockToLightClientHeader(t *testing.T) {
 			require.DeepSSZEqual(t, executionPayloadProof, header.ExecutionBranch, "Execution payload proofs are not equal")
 		})
 	})
+
+	t.Run("Electra", func(t *testing.T) {
+		t.Run("Non-Blinded Beacon Block", func(t *testing.T) {
+			l := util.NewTestLightClient(t).SetupTestElectra(false)
+
+			container, err := lightClient.BlockToLightClientHeader(l.Block)
+			require.NoError(t, err)
+			header := container.GetHeaderDeneb()
+			require.NotNil(t, header, "header is nil")
+
+			parentRoot := l.Block.Block().ParentRoot()
+			stateRoot := l.Block.Block().StateRoot()
+			bodyRoot, err := l.Block.Block().Body().HashTreeRoot()
+			require.NoError(t, err)
+
+			payload, err := l.Block.Block().Body().Execution()
+			require.NoError(t, err)
+
+			transactionsRoot, err := lightClient.ComputeTransactionsRoot(payload)
+			require.NoError(t, err)
+
+			withdrawalsRoot, err := lightClient.ComputeWithdrawalsRoot(payload)
+			require.NoError(t, err)
+
+			blobGasUsed, err := payload.BlobGasUsed()
+			require.NoError(t, err)
+
+			excessBlobGas, err := payload.ExcessBlobGas()
+			require.NoError(t, err)
+
+			executionHeader := &v11.ExecutionPayloadHeaderElectra{
+				ParentHash:       payload.ParentHash(),
+				FeeRecipient:     payload.FeeRecipient(),
+				StateRoot:        payload.StateRoot(),
+				ReceiptsRoot:     payload.ReceiptsRoot(),
+				LogsBloom:        payload.LogsBloom(),
+				PrevRandao:       payload.PrevRandao(),
+				BlockNumber:      payload.BlockNumber(),
+				GasLimit:         payload.GasLimit(),
+				GasUsed:          payload.GasUsed(),
+				Timestamp:        payload.Timestamp(),
+				ExtraData:        payload.ExtraData(),
+				BaseFeePerGas:    payload.BaseFeePerGas(),
+				BlockHash:        payload.BlockHash(),
+				TransactionsRoot: transactionsRoot,
+				WithdrawalsRoot:  withdrawalsRoot,
+				BlobGasUsed:      blobGasUsed,
+				ExcessBlobGas:    excessBlobGas,
+			}
+
+			executionPayloadProof, err := blocks.PayloadProof(l.Ctx, l.Block.Block())
+			require.NoError(t, err)
+
+			require.Equal(t, l.Block.Block().Slot(), header.Beacon.Slot, "Slot is not equal")
+			require.Equal(t, l.Block.Block().ProposerIndex(), header.Beacon.ProposerIndex, "Proposer index is not equal")
+			require.DeepSSZEqual(t, parentRoot[:], header.Beacon.ParentRoot, "Parent root is not equal")
+			require.DeepSSZEqual(t, stateRoot[:], header.Beacon.StateRoot, "State root is not equal")
+			require.DeepSSZEqual(t, bodyRoot[:], header.Beacon.BodyRoot, "Body root is not equal")
+
+			require.DeepSSZEqual(t, executionHeader, header.Execution, "Execution headers are not equal")
+
+			require.DeepSSZEqual(t, executionPayloadProof, header.ExecutionBranch, "Execution payload proofs are not equal")
+		})
+
+		t.Run("Blinded Beacon Block", func(t *testing.T) {
+			l := util.NewTestLightClient(t).SetupTestElectra(true)
+
+			container, err := lightClient.BlockToLightClientHeader(l.Block)
+			require.NoError(t, err)
+			header := container.GetHeaderDeneb()
+			require.NotNil(t, header, "header is nil")
+
+			parentRoot := l.Block.Block().ParentRoot()
+			stateRoot := l.Block.Block().StateRoot()
+			bodyRoot, err := l.Block.Block().Body().HashTreeRoot()
+			require.NoError(t, err)
+
+			payload, err := l.Block.Block().Body().Execution()
+			require.NoError(t, err)
+
+			transactionsRoot, err := payload.TransactionsRoot()
+			require.NoError(t, err)
+
+			withdrawalsRoot, err := payload.WithdrawalsRoot()
+			require.NoError(t, err)
+
+			blobGasUsed, err := payload.BlobGasUsed()
+			require.NoError(t, err)
+
+			excessBlobGas, err := payload.ExcessBlobGas()
+			require.NoError(t, err)
+
+			executionHeader := &v11.ExecutionPayloadHeaderElectra{
+				ParentHash:       payload.ParentHash(),
+				FeeRecipient:     payload.FeeRecipient(),
+				StateRoot:        payload.StateRoot(),
+				ReceiptsRoot:     payload.ReceiptsRoot(),
+				LogsBloom:        payload.LogsBloom(),
+				PrevRandao:       payload.PrevRandao(),
+				BlockNumber:      payload.BlockNumber(),
+				GasLimit:         payload.GasLimit(),
+				GasUsed:          payload.GasUsed(),
+				Timestamp:        payload.Timestamp(),
+				ExtraData:        payload.ExtraData(),
+				BaseFeePerGas:    payload.BaseFeePerGas(),
+				BlockHash:        payload.BlockHash(),
+				TransactionsRoot: transactionsRoot,
+				WithdrawalsRoot:  withdrawalsRoot,
+				BlobGasUsed:      blobGasUsed,
+				ExcessBlobGas:    excessBlobGas,
+			}
+
+			executionPayloadProof, err := blocks.PayloadProof(l.Ctx, l.Block.Block())
+			require.NoError(t, err)
+
+			require.Equal(t, l.Block.Block().Slot(), header.Beacon.Slot, "Slot is not equal")
+			require.Equal(t, l.Block.Block().ProposerIndex(), header.Beacon.ProposerIndex, "Proposer index is not equal")
+			require.DeepSSZEqual(t, parentRoot[:], header.Beacon.ParentRoot, "Parent root is not equal")
+			require.DeepSSZEqual(t, stateRoot[:], header.Beacon.StateRoot, "State root is not equal")
+			require.DeepSSZEqual(t, bodyRoot[:], header.Beacon.BodyRoot, "Body root is not equal")
+
+			require.DeepSSZEqual(t, executionHeader, header.Execution, "Execution headers are not equal")
+
+			require.DeepSSZEqual(t, executionPayloadProof, header.ExecutionBranch, "Execution payload proofs are not equal")
+		})
+	})
 }

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

@@ -20,6 +20,7 @@ go_library(
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
         "//config/params:go_default_library",
+        "//consensus-types/primitives:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
         "//network/httputil:go_default_library",
         "//proto/eth/v1:go_default_library",

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

@@ -13,7 +13,6 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/api"
 	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/operation"
 	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
@@ -21,6 +20,7 @@ import (
 	chaintime "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing/trace"
 	"github.com/prysmaticlabs/prysm/v5/network/httputil"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/eth/v1"
@@ -71,6 +71,7 @@ var (
 	errSlowReader         = errors.New("client failed to read fast enough to keep outgoing buffer below threshold")
 	errNotRequested       = errors.New("event not requested by client")
 	errUnhandledEventData = errors.New("unable to represent event data in the event stream")
+	errWriterUnusable     = errors.New("http response writer is unusable")
 )
 
 // StreamingResponseWriter defines a type that can be used by the eventStreamer.
@@ -309,10 +310,21 @@ func (es *eventStreamer) outboxWriteLoop(ctx context.Context, cancel context.Can
 	}
 }
 
+func writeLazyReaderWithRecover(w StreamingResponseWriter, lr lazyReader) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			log.WithField("panic", r).Error("Recovered from panic while writing event to client.")
+			err = errWriterUnusable
+		}
+	}()
+	_, err = io.Copy(w, lr())
+	return err
+}
+
 func (es *eventStreamer) writeOutbox(ctx context.Context, w StreamingResponseWriter, first lazyReader) error {
 	needKeepAlive := true
 	if first != nil {
-		if _, err := io.Copy(w, first()); err != nil {
+		if err := writeLazyReaderWithRecover(w, first); err != nil {
 			return err
 		}
 		needKeepAlive = false
@@ -325,13 +337,13 @@ func (es *eventStreamer) writeOutbox(ctx context.Context, w StreamingResponseWri
 		case <-ctx.Done():
 			return ctx.Err()
 		case rf := <-es.outbox:
-			if _, err := io.Copy(w, rf()); err != nil {
+			if err := writeLazyReaderWithRecover(w, rf); err != nil {
 				return err
 			}
 			needKeepAlive = false
 		default:
 			if needKeepAlive {
-				if _, err := io.Copy(w, newlineReader()); err != nil {
+				if err := writeLazyReaderWithRecover(w, newlineReader); err != nil {
 					return err
 				}
 			}
@@ -447,7 +459,7 @@ func (s *Server) lazyReaderForEvent(ctx context.Context, event *feed.Event, topi
 		}, nil
 	case *operation.BlobSidecarReceivedData:
 		return func() io.Reader {
-			versionedHash := blockchain.ConvertKzgCommitmentToVersionedHash(v.Blob.KzgCommitment)
+			versionedHash := primitives.ConvertKzgCommitmentToVersionedHash(v.Blob.KzgCommitment)
 			return jsonMarshalReader(eventName, &structs.BlobSidecarEvent{
 				BlockRoot:     hexutil.Encode(v.Blob.BlockRootSlice()),
 				Index:         fmt.Sprintf("%d", v.Blob.Index),

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

@@ -146,6 +146,46 @@ func TestLightClientHandler_GetLightClientBootstrap_Deneb(t *testing.T) {
 	require.NotNil(t, resp.Data.CurrentSyncCommitteeBranch)
 }
 
+func TestLightClientHandler_GetLightClientBootstrap_Electra(t *testing.T) {
+	l := util.NewTestLightClient(t).SetupTestElectra(false) // result is same for true and false
+
+	slot := l.State.Slot()
+	stateRoot, err := l.State.HashTreeRoot(l.Ctx)
+	require.NoError(t, err)
+
+	mockBlocker := &testutil.MockBlocker{BlockToReturn: l.Block}
+	mockChainService := &mock.ChainService{Optimistic: true, Slot: &slot}
+	s := &Server{
+		Stater: &testutil.MockStater{StatesBySlot: map[primitives.Slot]state.BeaconState{
+			slot: l.State,
+		}},
+		Blocker:     mockBlocker,
+		HeadFetcher: mockChainService,
+	}
+	request := httptest.NewRequest("GET", "http://foo.com/", nil)
+	request.SetPathValue("block_root", hexutil.Encode(stateRoot[:]))
+	writer := httptest.NewRecorder()
+	writer.Body = &bytes.Buffer{}
+
+	s.GetLightClientBootstrap(writer, request)
+	require.Equal(t, http.StatusOK, writer.Code)
+	var resp structs.LightClientBootstrapResponse
+	err = json.Unmarshal(writer.Body.Bytes(), &resp)
+	require.NoError(t, err)
+	var respHeader structs.LightClientHeader
+	err = json.Unmarshal(resp.Data.Header, &respHeader)
+	require.NoError(t, err)
+	require.Equal(t, "electra", resp.Version)
+
+	blockHeader, err := l.Block.Header()
+	require.NoError(t, err)
+	require.Equal(t, hexutil.Encode(blockHeader.Header.BodyRoot), respHeader.Beacon.BodyRoot)
+	require.Equal(t, strconv.FormatUint(uint64(blockHeader.Header.Slot), 10), respHeader.Beacon.Slot)
+
+	require.NotNil(t, resp.Data.CurrentSyncCommittee)
+	require.NotNil(t, resp.Data.CurrentSyncCommitteeBranch)
+}
+
 func TestLightClientHandler_GetLightClientUpdatesByRangeAltair(t *testing.T) {
 	helpers.ClearCache()
 	ctx := context.Background()

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

@@ -30,7 +30,7 @@ func createLightClientBootstrap(ctx context.Context, state state.BeaconState, bl
 		return createLightClientBootstrapAltair(ctx, state, blk)
 	case version.Capella:
 		return createLightClientBootstrapCapella(ctx, state, blk)
-	case version.Deneb:
+	case version.Deneb, version.Electra:
 		return createLightClientBootstrapDeneb(ctx, state, blk)
 	}
 	return nil, fmt.Errorf("unsupported block version %s", version.String(blk.Version()))
@@ -91,7 +91,7 @@ func createLightClientBootstrapAltair(ctx context.Context, state state.BeaconSta
 		return nil, errors.Wrap(err, "could not get current sync committee proof")
 	}
 
-	branch := make([]string, fieldparams.NextSyncCommitteeBranchDepth)
+	branch := make([]string, fieldparams.SyncCommitteeBranchDepth)
 	for i, proof := range currentSyncCommitteeProof {
 		branch[i] = hexutil.Encode(proof)
 	}
@@ -159,7 +159,7 @@ func createLightClientBootstrapCapella(ctx context.Context, state state.BeaconSt
 		return nil, errors.Wrap(err, "could not get current sync committee proof")
 	}
 
-	branch := make([]string, fieldparams.NextSyncCommitteeBranchDepth)
+	branch := make([]string, fieldparams.SyncCommitteeBranchDepth)
 	for i, proof := range currentSyncCommitteeProof {
 		branch[i] = hexutil.Encode(proof)
 	}
@@ -226,8 +226,13 @@ func createLightClientBootstrapDeneb(ctx context.Context, state state.BeaconStat
 	if err != nil {
 		return nil, errors.Wrap(err, "could not get current sync committee proof")
 	}
-
-	branch := make([]string, fieldparams.NextSyncCommitteeBranchDepth)
+	var branch []string
+	switch block.Version() {
+	case version.Deneb:
+		branch = make([]string, fieldparams.SyncCommitteeBranchDepth)
+	case version.Electra:
+		branch = make([]string, fieldparams.SyncCommitteeBranchDepthElectra)
+	}
 	for i, proof := range currentSyncCommitteeProof {
 		branch[i] = hexutil.Encode(proof)
 	}
@@ -288,7 +293,7 @@ func newLightClientOptimisticUpdateFromBeaconState(
 }
 
 func IsSyncCommitteeUpdate(update *v2.LightClientUpdate) bool {
-	nextSyncCommitteeBranch := make([][]byte, fieldparams.NextSyncCommitteeBranchDepth)
+	nextSyncCommitteeBranch := make([][]byte, fieldparams.SyncCommitteeBranchDepth)
 	return !reflect.DeepEqual(update.NextSyncCommitteeBranch, nextSyncCommitteeBranch)
 }
 

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

@@ -13,7 +13,7 @@ import (
 
 // When the update has relevant sync committee
 func createNonEmptySyncCommitteeBranch() [][]byte {
-	res := make([][]byte, fieldparams.NextSyncCommitteeBranchDepth)
+	res := make([][]byte, fieldparams.SyncCommitteeBranchDepth)
 	res[0] = []byte("xyz")
 	return res
 }
@@ -101,7 +101,7 @@ func TestIsBetterUpdate(t *testing.T) {
 						}},
 					},
 				},
-				NextSyncCommitteeBranch: make([][]byte, fieldparams.NextSyncCommitteeBranchDepth),
+				NextSyncCommitteeBranch: make([][]byte, fieldparams.SyncCommitteeBranchDepth),
 				SignatureSlot:           9999,
 			},
 			newUpdate: &ethpbv2.LightClientUpdate{
@@ -147,7 +147,7 @@ func TestIsBetterUpdate(t *testing.T) {
 						}},
 					},
 				},
-				NextSyncCommitteeBranch: make([][]byte, fieldparams.NextSyncCommitteeBranchDepth),
+				NextSyncCommitteeBranch: make([][]byte, fieldparams.SyncCommitteeBranchDepth),
 				SignatureSlot:           9999,
 			},
 			expectedResult: false,

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

@@ -217,10 +217,10 @@ func (a proposerAtts) sort() (proposerAtts, error) {
 		return a, nil
 	}
 
-	if features.Get().EnableCommitteeAwarePacking {
-		return a.sortBySlotAndCommittee()
+	if features.Get().DisableCommitteeAwarePacking {
+		return a.sortByProfitabilityUsingMaxCover()
 	}
-	return a.sortByProfitabilityUsingMaxCover()
+	return a.sortBySlotAndCommittee()
 }
 
 // Separate attestations by slot, as slot number takes higher precedence when sorting.

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

@@ -21,6 +21,11 @@ import (
 )
 
 func TestProposer_ProposerAtts_sort(t *testing.T) {
+	feat := features.Get()
+	feat.DisableCommitteeAwarePacking = true
+	reset := features.InitWithReset(feat)
+	defer reset()
+
 	type testData struct {
 		slot primitives.Slot
 		bits bitfield.Bitlist
@@ -186,11 +191,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	}
 
 	t.Run("no atts", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		atts := getAtts([]testData{})
 		want := getAtts([]testData{})
 		atts, err := atts.sort()
@@ -201,11 +201,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	})
 
 	t.Run("single att", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		atts := getAtts([]testData{
 			{4, bitfield.Bitlist{0b11100000, 0b1}},
 		})
@@ -220,11 +215,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	})
 
 	t.Run("single att per slot", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		atts := getAtts([]testData{
 			{1, bitfield.Bitlist{0b11000000, 0b1}},
 			{4, bitfield.Bitlist{0b11100000, 0b1}},
@@ -241,10 +231,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	})
 
 	t.Run("two atts on one of the slots", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
 
 		atts := getAtts([]testData{
 			{1, bitfield.Bitlist{0b11000000, 0b1}},
@@ -263,11 +249,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	})
 
 	t.Run("compare to native sort", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		// The max-cover based approach will select 0b00001100 instead, despite lower bit count
 		// (since it has two new/unknown bits).
 		t.Run("max-cover", func(t *testing.T) {
@@ -289,11 +270,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	})
 
 	t.Run("multiple slots", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		atts := getAtts([]testData{
 			{2, bitfield.Bitlist{0b11100000, 0b1}},
 			{4, bitfield.Bitlist{0b11100000, 0b1}},
@@ -316,11 +292,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 	})
 
 	t.Run("follows max-cover", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		// Items at slot 4 must be first split into two lists by max-cover, with
 		// 0b10000011 being selected and 0b11100001 being leftover (despite naive bit count suggesting otherwise).
 		atts := getAtts([]testData{
@@ -350,11 +321,6 @@ func TestProposer_ProposerAtts_committeeAwareSort(t *testing.T) {
 
 func TestProposer_sort_DifferentCommittees(t *testing.T) {
 	t.Run("one att per committee", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		c1_a1 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b11111000, 0b1}, Data: &ethpb.AttestationData{CommitteeIndex: 1}})
 		c2_a1 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b11100000, 0b1}, Data: &ethpb.AttestationData{CommitteeIndex: 2}})
 		atts := proposerAtts{c1_a1, c2_a1}
@@ -364,11 +330,6 @@ func TestProposer_sort_DifferentCommittees(t *testing.T) {
 		assert.DeepEqual(t, want, atts)
 	})
 	t.Run("multiple atts per committee", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		c1_a1 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b11111100, 0b1}, Data: &ethpb.AttestationData{CommitteeIndex: 1}})
 		c1_a2 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b10000010, 0b1}, Data: &ethpb.AttestationData{CommitteeIndex: 1}})
 		c2_a1 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b11110000, 0b1}, Data: &ethpb.AttestationData{CommitteeIndex: 2}})
@@ -381,11 +342,6 @@ func TestProposer_sort_DifferentCommittees(t *testing.T) {
 		assert.DeepEqual(t, want, atts)
 	})
 	t.Run("multiple atts per committee, multiple slots", func(t *testing.T) {
-		feat := features.Get()
-		feat.EnableCommitteeAwarePacking = true
-		reset := features.InitWithReset(feat)
-		defer reset()
-
 		s2_c1_a1 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b11111100, 0b1}, Data: &ethpb.AttestationData{Slot: 2, CommitteeIndex: 1}})
 		s2_c1_a2 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b10000010, 0b1}, Data: &ethpb.AttestationData{Slot: 2, CommitteeIndex: 1}})
 		s2_c2_a1 := util.HydrateAttestation(&ethpb.Attestation{AggregationBits: bitfield.Bitlist{0b11110000, 0b1}, Data: &ethpb.AttestationData{Slot: 2, CommitteeIndex: 2}})

config/features/config.go

@@ -48,7 +48,7 @@ type Flags struct {
 	EnableDoppelGanger                  bool // EnableDoppelGanger enables doppelganger protection on startup for the validator.
 	EnableHistoricalSpaceRepresentation bool // EnableHistoricalSpaceRepresentation enables the saving of registry validators in separate buckets to save space
 	EnableBeaconRESTApi                 bool // EnableBeaconRESTApi enables experimental usage of the beacon REST API by the validator when querying a beacon node
-	EnableCommitteeAwarePacking         bool // EnableCommitteeAwarePacking TODO
+	DisableCommitteeAwarePacking        bool // DisableCommitteeAwarePacking changes the attestation packing algorithm to one that is not aware of attesting committees.
 	// Logging related toggles.
 	DisableGRPCConnectionLogs bool // Disables logging when a new grpc client has connected.
 	EnableFullSSZDataLogging  bool // Enables logging for full ssz data on rejected gossip messages
@@ -256,9 +256,9 @@ func ConfigureBeaconChain(ctx *cli.Context) error {
 		logEnabled(EnableQUIC)
 		cfg.EnableQUIC = true
 	}
-	if ctx.IsSet(EnableCommitteeAwarePacking.Name) {
-		logEnabled(EnableCommitteeAwarePacking)
-		cfg.EnableCommitteeAwarePacking = true
+	if ctx.IsSet(DisableCommitteeAwarePacking.Name) {
+		logEnabled(DisableCommitteeAwarePacking)
+		cfg.DisableCommitteeAwarePacking = true
 	}
 
 	cfg.AggregateIntervals = [3]time.Duration{aggregateFirstInterval.Value, aggregateSecondInterval.Value, aggregateThirdInterval.Value}

config/features/deprecated_flags.go

@@ -77,6 +77,12 @@ var (
 		Usage:  deprecatedUsage,
 		Hidden: true,
 	}
+
+	deprecatedEnableCommitteeAwarePacking = &cli.BoolFlag{
+		Name:   "enable-committee-aware-packing",
+		Usage:  deprecatedUsage,
+		Hidden: true,
+	}
 )
 
 // Deprecated flags for both the beacon node and validator client.
@@ -94,6 +100,7 @@ var deprecatedFlags = []cli.Flag{
 	deprecatedBeaconRPCGatewayProviderFlag,
 	deprecatedDisableGRPCGateway,
 	deprecatedEnableExperimentalState,
+	deprecatedEnableCommitteeAwarePacking,
 }
 
 // deprecatedBeaconFlags contains flags that are still used by other components

config/features/flags.go

@@ -166,9 +166,9 @@ var (
 		Name:  "enable-quic",
 		Usage: "Enables connection using the QUIC protocol for peers which support it.",
 	}
-	EnableCommitteeAwarePacking = &cli.BoolFlag{
-		Name:  "enable-committee-aware-packing",
-		Usage: "Changes the attestation packing algorithm to one that is aware of attesting committees.",
+	DisableCommitteeAwarePacking = &cli.BoolFlag{
+		Name:  "disable-committee-aware-packing",
+		Usage: "Changes the attestation packing algorithm to one that is not aware of attesting committees.",
 	}
 )
 
@@ -226,7 +226,7 @@ var BeaconChainFlags = append(deprecatedBeaconFlags, append(deprecatedFlags, []c
 	EnableLightClient,
 	BlobSaveFsync,
 	EnableQUIC,
-	EnableCommitteeAwarePacking,
+	DisableCommitteeAwarePacking,
 }...)...)
 
 // E2EBeaconChainFlags contains a list of the beacon chain feature flags to be tested in E2E.

config/fieldparams/mainnet.go

@@ -33,7 +33,10 @@ const (
 	BlobSize                              = 131072        // defined to match blob.size in bazel ssz codegen
 	BlobSidecarSize                       = 131928        // defined to match blob sidecar size in bazel ssz codegen
 	KzgCommitmentInclusionProofDepth      = 17            // Merkle proof depth for blob_kzg_commitments list item
-	NextSyncCommitteeBranchDepth          = 5             // NextSyncCommitteeBranchDepth defines the depth of the next sync committee branch.
+	ExecutionBranchDepth                  = 4             // ExecutionBranchDepth defines the number of leaves in a merkle proof of the execution payload header.
+	SyncCommitteeBranchDepth              = 5             // SyncCommitteeBranchDepth defines the number of leaves in a merkle proof of a sync committee.
+	SyncCommitteeBranchDepthElectra       = 6             // SyncCommitteeBranchDepthElectra defines the number of leaves in a merkle proof of a sync committee.
+	FinalityBranchDepth                   = 6             // FinalityBranchDepth defines the number of leaves in a merkle proof of the finalized checkpoint root.
 	PendingBalanceDepositsLimit           = 134217728     // Maximum number of pending balance deposits in the beacon state.
 	PendingPartialWithdrawalsLimit        = 134217728     // Maximum number of pending partial withdrawals in the beacon state.
 	PendingConsolidationsLimit            = 262144        // Maximum number of pending consolidations in the beacon state.

config/fieldparams/minimal.go

@@ -33,7 +33,10 @@ const (
 	BlobSize                              = 131072        // defined to match blob.size in bazel ssz codegen
 	BlobSidecarSize                       = 131928        // defined to match blob sidecar size in bazel ssz codegen
 	KzgCommitmentInclusionProofDepth      = 17            // Merkle proof depth for blob_kzg_commitments list item
-	NextSyncCommitteeBranchDepth          = 5             // NextSyncCommitteeBranchDepth defines the depth of the next sync committee branch.
+	ExecutionBranchDepth                  = 4             // ExecutionBranchDepth defines the number of leaves in a merkle proof of the execution payload header.
+	SyncCommitteeBranchDepth              = 5             // SyncCommitteeBranchDepth defines the number of leaves in a merkle proof of a sync committee.
+	SyncCommitteeBranchDepthElectra       = 6             // SyncCommitteeBranchDepthElectra defines the number of leaves in a merkle proof of a sync committee.
+	FinalityBranchDepth                   = 6             // FinalityBranchDepth defines the number of leaves in a merkle proof of the finalized checkpoint root.
 	PendingBalanceDepositsLimit           = 134217728     // Maximum number of pending balance deposits in the beacon state.
 	PendingPartialWithdrawalsLimit        = 64            // Maximum number of pending partial withdrawals in the beacon state.
 	PendingConsolidationsLimit            = 64            // Maximum number of pending consolidations in the beacon state.

consensus-types/interfaces/BUILD.bazel

@@ -5,6 +5,7 @@ go_library(
     srcs = [
         "beacon_block.go",
         "error.go",
+        "light_client.go",
         "utils.go",
         "validator.go",
     ],

consensus-types/interfaces/light_client.go

@@ -0,0 +1,58 @@
+package interfaces
+
+import (
+	ssz "github.com/prysmaticlabs/fastssz"
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+)
+
+type LightClientExecutionBranch = [fieldparams.ExecutionBranchDepth][fieldparams.RootLength]byte
+type LightClientSyncCommitteeBranch = [fieldparams.SyncCommitteeBranchDepth][fieldparams.RootLength]byte
+type LightClientFinalityBranch = [fieldparams.FinalityBranchDepth][fieldparams.RootLength]byte
+
+type LightClientHeader interface {
+	ssz.Marshaler
+	Version() int
+	Beacon() *pb.BeaconBlockHeader
+	Execution() (ExecutionData, error)
+	ExecutionBranch() (LightClientExecutionBranch, error)
+}
+
+type LightClientBootstrap interface {
+	ssz.Marshaler
+	Version() int
+	Header() LightClientHeader
+	CurrentSyncCommittee() *pb.SyncCommittee
+	CurrentSyncCommitteeBranch() LightClientSyncCommitteeBranch
+}
+
+type LightClientUpdate interface {
+	ssz.Marshaler
+	Version() int
+	AttestedHeader() LightClientHeader
+	NextSyncCommittee() *pb.SyncCommittee
+	NextSyncCommitteeBranch() LightClientSyncCommitteeBranch
+	FinalizedHeader() LightClientHeader
+	FinalityBranch() LightClientFinalityBranch
+	SyncAggregate() *pb.SyncAggregate
+	SignatureSlot() primitives.Slot
+}
+
+type LightClientFinalityUpdate interface {
+	ssz.Marshaler
+	Version() int
+	AttestedHeader() LightClientHeader
+	FinalizedHeader() LightClientHeader
+	FinalityBranch() LightClientFinalityBranch
+	SyncAggregate() *pb.SyncAggregate
+	SignatureSlot() primitives.Slot
+}
+
+type LightClientOptimisticUpdate interface {
+	ssz.Marshaler
+	Version() int
+	AttestedHeader() LightClientHeader
+	SyncAggregate() *pb.SyncAggregate
+	SignatureSlot() primitives.Slot
+}

consensus-types/light-client/BUILD.bazel

@@ -0,0 +1,26 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "bootstrap.go",
+        "finality_update.go",
+        "header.go",
+        "helpers.go",
+        "optimistic_update.go",
+        "update.go",
+    ],
+    importpath = "github.com/prysmaticlabs/prysm/v5/consensus-types/light-client",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//config/fieldparams:go_default_library",
+        "//consensus-types:go_default_library",
+        "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
+        "//consensus-types/primitives:go_default_library",
+        "//encoding/bytesutil:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
+        "//runtime/version:go_default_library",
+        "@org_golang_google_protobuf//proto:go_default_library",
+    ],
+)

consensus-types/light-client/bootstrap.go

@@ -0,0 +1,208 @@
+package light_client
+
+import (
+	"fmt"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	consensustypes "github.com/prysmaticlabs/prysm/v5/consensus-types"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"google.golang.org/protobuf/proto"
+)
+
+func NewWrappedBootstrap(m proto.Message) (interfaces.LightClientBootstrap, error) {
+	if m == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	switch t := m.(type) {
+	case *pb.LightClientBootstrapAltair:
+		return NewWrappedBootstrapAltair(t)
+	case *pb.LightClientBootstrapCapella:
+		return NewWrappedBootstrapCapella(t)
+	case *pb.LightClientBootstrapDeneb:
+		return NewWrappedBootstrapDeneb(t)
+	default:
+		return nil, fmt.Errorf("cannot construct light client bootstrap from type %T", t)
+	}
+}
+
+type bootstrapAltair struct {
+	p                          *pb.LightClientBootstrapAltair
+	header                     interfaces.LightClientHeader
+	currentSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranch
+}
+
+var _ interfaces.LightClientBootstrap = &bootstrapAltair{}
+
+func NewWrappedBootstrapAltair(p *pb.LightClientBootstrapAltair) (interfaces.LightClientBootstrap, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	header, err := NewWrappedHeaderAltair(p.Header)
+	if err != nil {
+		return nil, err
+	}
+	branch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
+		"sync committee",
+		p.CurrentSyncCommitteeBranch,
+		fieldparams.SyncCommitteeBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &bootstrapAltair{
+		p:                          p,
+		header:                     header,
+		currentSyncCommitteeBranch: branch,
+	}, nil
+}
+
+func (h *bootstrapAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *bootstrapAltair) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *bootstrapAltair) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *bootstrapAltair) Version() int {
+	return version.Altair
+}
+
+func (h *bootstrapAltair) Header() interfaces.LightClientHeader {
+	return h.header
+}
+
+func (h *bootstrapAltair) CurrentSyncCommittee() *pb.SyncCommittee {
+	return h.p.CurrentSyncCommittee
+}
+
+func (h *bootstrapAltair) CurrentSyncCommitteeBranch() interfaces.LightClientSyncCommitteeBranch {
+	return h.currentSyncCommitteeBranch
+}
+
+type bootstrapCapella struct {
+	p                          *pb.LightClientBootstrapCapella
+	header                     interfaces.LightClientHeader
+	currentSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranch
+}
+
+var _ interfaces.LightClientBootstrap = &bootstrapCapella{}
+
+func NewWrappedBootstrapCapella(p *pb.LightClientBootstrapCapella) (interfaces.LightClientBootstrap, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	header, err := NewWrappedHeaderCapella(p.Header)
+	if err != nil {
+		return nil, err
+	}
+	branch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
+		"sync committee",
+		p.CurrentSyncCommitteeBranch,
+		fieldparams.SyncCommitteeBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &bootstrapCapella{
+		p:                          p,
+		header:                     header,
+		currentSyncCommitteeBranch: branch,
+	}, nil
+}
+
+func (h *bootstrapCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *bootstrapCapella) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *bootstrapCapella) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *bootstrapCapella) Version() int {
+	return version.Capella
+}
+
+func (h *bootstrapCapella) Header() interfaces.LightClientHeader {
+	return h.header
+}
+
+func (h *bootstrapCapella) CurrentSyncCommittee() *pb.SyncCommittee {
+	return h.p.CurrentSyncCommittee
+}
+
+func (h *bootstrapCapella) CurrentSyncCommitteeBranch() interfaces.LightClientSyncCommitteeBranch {
+	return h.currentSyncCommitteeBranch
+}
+
+type bootstrapDeneb struct {
+	p                          *pb.LightClientBootstrapDeneb
+	header                     interfaces.LightClientHeader
+	currentSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranch
+}
+
+var _ interfaces.LightClientBootstrap = &bootstrapDeneb{}
+
+func NewWrappedBootstrapDeneb(p *pb.LightClientBootstrapDeneb) (interfaces.LightClientBootstrap, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	header, err := NewWrappedHeaderDeneb(p.Header)
+	if err != nil {
+		return nil, err
+	}
+	branch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
+		"sync committee",
+		p.CurrentSyncCommitteeBranch,
+		fieldparams.SyncCommitteeBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &bootstrapDeneb{
+		p:                          p,
+		header:                     header,
+		currentSyncCommitteeBranch: branch,
+	}, nil
+}
+
+func (h *bootstrapDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *bootstrapDeneb) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *bootstrapDeneb) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *bootstrapDeneb) Version() int {
+	return version.Deneb
+}
+
+func (h *bootstrapDeneb) Header() interfaces.LightClientHeader {
+	return h.header
+}
+
+func (h *bootstrapDeneb) CurrentSyncCommittee() *pb.SyncCommittee {
+	return h.p.CurrentSyncCommittee
+}
+
+func (h *bootstrapDeneb) CurrentSyncCommitteeBranch() interfaces.LightClientSyncCommitteeBranch {
+	return h.currentSyncCommitteeBranch
+}

consensus-types/light-client/finality_update.go

@@ -0,0 +1,251 @@
+package light_client
+
+import (
+	"fmt"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	consensustypes "github.com/prysmaticlabs/prysm/v5/consensus-types"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"google.golang.org/protobuf/proto"
+)
+
+func NewWrappedFinalityUpdate(m proto.Message) (interfaces.LightClientFinalityUpdate, error) {
+	if m == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	switch t := m.(type) {
+	case *pb.LightClientFinalityUpdateAltair:
+		return NewWrappedFinalityUpdateAltair(t)
+	case *pb.LightClientFinalityUpdateCapella:
+		return NewWrappedFinalityUpdateCapella(t)
+	case *pb.LightClientFinalityUpdateDeneb:
+		return NewWrappedFinalityUpdateDeneb(t)
+	default:
+		return nil, fmt.Errorf("cannot construct light client finality update from type %T", t)
+	}
+}
+
+type finalityUpdateAltair struct {
+	p               *pb.LightClientFinalityUpdateAltair
+	attestedHeader  interfaces.LightClientHeader
+	finalizedHeader interfaces.LightClientHeader
+	finalityBranch  interfaces.LightClientFinalityBranch
+}
+
+var _ interfaces.LightClientFinalityUpdate = &finalityUpdateAltair{}
+
+func NewWrappedFinalityUpdateAltair(p *pb.LightClientFinalityUpdateAltair) (interfaces.LightClientFinalityUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderAltair(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeaderAltair(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+	branch, err := createBranch[interfaces.LightClientFinalityBranch](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &finalityUpdateAltair{
+		p:               p,
+		attestedHeader:  attestedHeader,
+		finalizedHeader: finalizedHeader,
+		finalityBranch:  branch,
+	}, nil
+}
+
+func (u *finalityUpdateAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *finalityUpdateAltair) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *finalityUpdateAltair) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *finalityUpdateAltair) Version() int {
+	return version.Altair
+}
+
+func (u *finalityUpdateAltair) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *finalityUpdateAltair) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *finalityUpdateAltair) FinalityBranch() interfaces.LightClientFinalityBranch {
+	return u.finalityBranch
+}
+
+func (u *finalityUpdateAltair) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *finalityUpdateAltair) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}
+
+type finalityUpdateCapella struct {
+	p               *pb.LightClientFinalityUpdateCapella
+	attestedHeader  interfaces.LightClientHeader
+	finalizedHeader interfaces.LightClientHeader
+	finalityBranch  interfaces.LightClientFinalityBranch
+}
+
+var _ interfaces.LightClientFinalityUpdate = &finalityUpdateCapella{}
+
+func NewWrappedFinalityUpdateCapella(p *pb.LightClientFinalityUpdateCapella) (interfaces.LightClientFinalityUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderCapella(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeaderCapella(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+	branch, err := createBranch[interfaces.LightClientFinalityBranch](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &finalityUpdateCapella{
+		p:               p,
+		attestedHeader:  attestedHeader,
+		finalizedHeader: finalizedHeader,
+		finalityBranch:  branch,
+	}, nil
+}
+
+func (u *finalityUpdateCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *finalityUpdateCapella) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *finalityUpdateCapella) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *finalityUpdateCapella) Version() int {
+	return version.Capella
+}
+
+func (u *finalityUpdateCapella) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *finalityUpdateCapella) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *finalityUpdateCapella) FinalityBranch() interfaces.LightClientFinalityBranch {
+	return u.finalityBranch
+}
+
+func (u *finalityUpdateCapella) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *finalityUpdateCapella) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}
+
+type finalityUpdateDeneb struct {
+	p               *pb.LightClientFinalityUpdateDeneb
+	attestedHeader  interfaces.LightClientHeader
+	finalizedHeader interfaces.LightClientHeader
+	finalityBranch  interfaces.LightClientFinalityBranch
+}
+
+var _ interfaces.LightClientFinalityUpdate = &finalityUpdateDeneb{}
+
+func NewWrappedFinalityUpdateDeneb(p *pb.LightClientFinalityUpdateDeneb) (interfaces.LightClientFinalityUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderDeneb(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeaderDeneb(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+	branch, err := createBranch[interfaces.LightClientFinalityBranch](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &finalityUpdateDeneb{
+		p:               p,
+		attestedHeader:  attestedHeader,
+		finalizedHeader: finalizedHeader,
+		finalityBranch:  branch,
+	}, nil
+}
+
+func (u *finalityUpdateDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *finalityUpdateDeneb) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *finalityUpdateDeneb) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *finalityUpdateDeneb) Version() int {
+	return version.Deneb
+}
+
+func (u *finalityUpdateDeneb) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *finalityUpdateDeneb) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *finalityUpdateDeneb) FinalityBranch() interfaces.LightClientFinalityBranch {
+	return u.finalityBranch
+}
+
+func (u *finalityUpdateDeneb) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *finalityUpdateDeneb) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}

consensus-types/light-client/header.go

@@ -0,0 +1,192 @@
+package light_client
+
+import (
+	"fmt"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	consensustypes "github.com/prysmaticlabs/prysm/v5/consensus-types"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"google.golang.org/protobuf/proto"
+)
+
+func NewWrappedHeader(m proto.Message) (interfaces.LightClientHeader, error) {
+	if m == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	switch t := m.(type) {
+	case *pb.LightClientHeaderAltair:
+		return NewWrappedHeaderAltair(t)
+	case *pb.LightClientHeaderCapella:
+		return NewWrappedHeaderCapella(t)
+	case *pb.LightClientHeaderDeneb:
+		return NewWrappedHeaderDeneb(t)
+	default:
+		return nil, fmt.Errorf("cannot construct light client header from type %T", t)
+	}
+}
+
+type headerAltair struct {
+	p *pb.LightClientHeaderAltair
+}
+
+var _ interfaces.LightClientHeader = &headerAltair{}
+
+func NewWrappedHeaderAltair(p *pb.LightClientHeaderAltair) (interfaces.LightClientHeader, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	return &headerAltair{p: p}, nil
+}
+
+func (h *headerAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *headerAltair) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *headerAltair) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *headerAltair) Version() int {
+	return version.Altair
+}
+
+func (h *headerAltair) Beacon() *pb.BeaconBlockHeader {
+	return h.p.Beacon
+}
+
+func (h *headerAltair) Execution() (interfaces.ExecutionData, error) {
+	return nil, consensustypes.ErrNotSupported("Execution", version.Altair)
+}
+
+func (h *headerAltair) ExecutionBranch() (interfaces.LightClientExecutionBranch, error) {
+	return interfaces.LightClientExecutionBranch{}, consensustypes.ErrNotSupported("ExecutionBranch", version.Altair)
+}
+
+type headerCapella struct {
+	p               *pb.LightClientHeaderCapella
+	execution       interfaces.ExecutionData
+	executionBranch interfaces.LightClientExecutionBranch
+}
+
+var _ interfaces.LightClientHeader = &headerCapella{}
+
+func NewWrappedHeaderCapella(p *pb.LightClientHeaderCapella) (interfaces.LightClientHeader, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	execution, err := blocks.WrappedExecutionPayloadHeaderCapella(p.Execution)
+	if err != nil {
+		return nil, err
+	}
+
+	branch, err := createBranch[interfaces.LightClientExecutionBranch](
+		"execution",
+		p.ExecutionBranch,
+		fieldparams.ExecutionBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &headerCapella{
+		p:               p,
+		execution:       execution,
+		executionBranch: branch,
+	}, nil
+}
+
+func (h *headerCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *headerCapella) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *headerCapella) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *headerCapella) Version() int {
+	return version.Capella
+}
+
+func (h *headerCapella) Beacon() *pb.BeaconBlockHeader {
+	return h.p.Beacon
+}
+
+func (h *headerCapella) Execution() (interfaces.ExecutionData, error) {
+	return h.execution, nil
+}
+
+func (h *headerCapella) ExecutionBranch() (interfaces.LightClientExecutionBranch, error) {
+	return h.executionBranch, nil
+}
+
+type headerDeneb struct {
+	p               *pb.LightClientHeaderDeneb
+	execution       interfaces.ExecutionData
+	executionBranch interfaces.LightClientExecutionBranch
+}
+
+var _ interfaces.LightClientHeader = &headerDeneb{}
+
+func NewWrappedHeaderDeneb(p *pb.LightClientHeaderDeneb) (interfaces.LightClientHeader, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	execution, err := blocks.WrappedExecutionPayloadHeaderDeneb(p.Execution)
+	if err != nil {
+		return nil, err
+	}
+
+	branch, err := createBranch[interfaces.LightClientExecutionBranch](
+		"execution",
+		p.ExecutionBranch,
+		fieldparams.ExecutionBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &headerDeneb{
+		p:               p,
+		execution:       execution,
+		executionBranch: branch,
+	}, nil
+}
+
+func (h *headerDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return h.p.MarshalSSZTo(dst)
+}
+
+func (h *headerDeneb) MarshalSSZ() ([]byte, error) {
+	return h.p.MarshalSSZ()
+}
+
+func (h *headerDeneb) SizeSSZ() int {
+	return h.p.SizeSSZ()
+}
+
+func (h *headerDeneb) Version() int {
+	return version.Deneb
+}
+
+func (h *headerDeneb) Beacon() *pb.BeaconBlockHeader {
+	return h.p.Beacon
+}
+
+func (h *headerDeneb) Execution() (interfaces.ExecutionData, error) {
+	return h.execution, nil
+}
+
+func (h *headerDeneb) ExecutionBranch() (interfaces.LightClientExecutionBranch, error) {
+	return h.executionBranch, nil
+}

consensus-types/light-client/helpers.go

@@ -0,0 +1,30 @@
+package light_client
+
+import (
+	"fmt"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+)
+
+type branchConstraint interface {
+	~interfaces.LightClientExecutionBranch | ~interfaces.LightClientSyncCommitteeBranch | ~interfaces.LightClientFinalityBranch
+}
+
+func createBranch[T branchConstraint](name string, input [][]byte, depth int) (T, error) {
+	var zero T
+
+	if len(input) != depth {
+		return zero, fmt.Errorf("%s branch has %d leaves instead of expected %d", name, len(input), depth)
+	}
+	var branch T
+	for i, leaf := range input {
+		if len(leaf) != fieldparams.RootLength {
+			return zero, fmt.Errorf("%s branch leaf at index %d has length %d instead of expected %d", name, i, len(leaf), fieldparams.RootLength)
+		}
+		branch[i] = bytesutil.ToBytes32(leaf)
+	}
+
+	return branch, nil
+}

consensus-types/light-client/optimistic_update.go

@@ -0,0 +1,178 @@
+package light_client
+
+import (
+	"fmt"
+
+	consensustypes "github.com/prysmaticlabs/prysm/v5/consensus-types"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"google.golang.org/protobuf/proto"
+)
+
+func NewWrappedOptimisticUpdate(m proto.Message) (interfaces.LightClientOptimisticUpdate, error) {
+	if m == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	switch t := m.(type) {
+	case *pb.LightClientOptimisticUpdateAltair:
+		return NewWrappedOptimisticUpdateAltair(t)
+	case *pb.LightClientOptimisticUpdateCapella:
+		return NewWrappedOptimisticUpdateCapella(t)
+	case *pb.LightClientOptimisticUpdateDeneb:
+		return NewWrappedOptimisticUpdateDeneb(t)
+	default:
+		return nil, fmt.Errorf("cannot construct light client optimistic update from type %T", t)
+	}
+}
+
+type OptimisticUpdateAltair struct {
+	p              *pb.LightClientOptimisticUpdateAltair
+	attestedHeader interfaces.LightClientHeader
+}
+
+var _ interfaces.LightClientOptimisticUpdate = &OptimisticUpdateAltair{}
+
+func NewWrappedOptimisticUpdateAltair(p *pb.LightClientOptimisticUpdateAltair) (interfaces.LightClientOptimisticUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderAltair(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+
+	return &OptimisticUpdateAltair{
+		p:              p,
+		attestedHeader: attestedHeader,
+	}, nil
+}
+
+func (u *OptimisticUpdateAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *OptimisticUpdateAltair) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *OptimisticUpdateAltair) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *OptimisticUpdateAltair) Version() int {
+	return version.Altair
+}
+
+func (u *OptimisticUpdateAltair) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *OptimisticUpdateAltair) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *OptimisticUpdateAltair) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}
+
+type OptimisticUpdateCapella struct {
+	p              *pb.LightClientOptimisticUpdateCapella
+	attestedHeader interfaces.LightClientHeader
+}
+
+var _ interfaces.LightClientOptimisticUpdate = &OptimisticUpdateCapella{}
+
+func NewWrappedOptimisticUpdateCapella(p *pb.LightClientOptimisticUpdateCapella) (interfaces.LightClientOptimisticUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderCapella(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+
+	return &OptimisticUpdateCapella{
+		p:              p,
+		attestedHeader: attestedHeader,
+	}, nil
+}
+
+func (u *OptimisticUpdateCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *OptimisticUpdateCapella) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *OptimisticUpdateCapella) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *OptimisticUpdateCapella) Version() int {
+	return version.Capella
+}
+
+func (u *OptimisticUpdateCapella) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *OptimisticUpdateCapella) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *OptimisticUpdateCapella) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}
+
+type OptimisticUpdateDeneb struct {
+	p              *pb.LightClientOptimisticUpdateDeneb
+	attestedHeader interfaces.LightClientHeader
+}
+
+var _ interfaces.LightClientOptimisticUpdate = &OptimisticUpdateDeneb{}
+
+func NewWrappedOptimisticUpdateDeneb(p *pb.LightClientOptimisticUpdateDeneb) (interfaces.LightClientOptimisticUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderDeneb(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+
+	return &OptimisticUpdateDeneb{
+		p:              p,
+		attestedHeader: attestedHeader,
+	}, nil
+}
+
+func (u *OptimisticUpdateDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *OptimisticUpdateDeneb) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *OptimisticUpdateDeneb) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *OptimisticUpdateDeneb) Version() int {
+	return version.Deneb
+}
+
+func (u *OptimisticUpdateDeneb) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *OptimisticUpdateDeneb) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *OptimisticUpdateDeneb) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}

consensus-types/light-client/update.go

@@ -0,0 +1,305 @@
+package light_client
+
+import (
+	"fmt"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	consensustypes "github.com/prysmaticlabs/prysm/v5/consensus-types"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"google.golang.org/protobuf/proto"
+)
+
+func NewWrappedUpdate(m proto.Message) (interfaces.LightClientUpdate, error) {
+	if m == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	switch t := m.(type) {
+	case *pb.LightClientUpdateAltair:
+		return NewWrappedUpdateAltair(t)
+	case *pb.LightClientUpdateCapella:
+		return NewWrappedUpdateCapella(t)
+	case *pb.LightClientUpdateDeneb:
+		return NewWrappedUpdateDeneb(t)
+	default:
+		return nil, fmt.Errorf("cannot construct light client update from type %T", t)
+	}
+}
+
+type updateAltair struct {
+	p                       *pb.LightClientUpdateAltair
+	attestedHeader          interfaces.LightClientHeader
+	nextSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranch
+	finalizedHeader         interfaces.LightClientHeader
+	finalityBranch          interfaces.LightClientFinalityBranch
+}
+
+var _ interfaces.LightClientUpdate = &updateAltair{}
+
+func NewWrappedUpdateAltair(p *pb.LightClientUpdateAltair) (interfaces.LightClientUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderAltair(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeaderAltair(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
+		"sync committee",
+		p.NextSyncCommitteeBranch,
+		fieldparams.SyncCommitteeBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+	finalityBranch, err := createBranch[interfaces.LightClientFinalityBranch](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &updateAltair{
+		p:                       p,
+		attestedHeader:          attestedHeader,
+		nextSyncCommitteeBranch: scBranch,
+		finalizedHeader:         finalizedHeader,
+		finalityBranch:          finalityBranch,
+	}, nil
+}
+
+func (u *updateAltair) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *updateAltair) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *updateAltair) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *updateAltair) Version() int {
+	return version.Altair
+}
+
+func (u *updateAltair) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *updateAltair) NextSyncCommittee() *pb.SyncCommittee {
+	return u.p.NextSyncCommittee
+}
+
+func (u *updateAltair) NextSyncCommitteeBranch() interfaces.LightClientSyncCommitteeBranch {
+	return u.nextSyncCommitteeBranch
+}
+
+func (u *updateAltair) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *updateAltair) FinalityBranch() interfaces.LightClientFinalityBranch {
+	return u.finalityBranch
+}
+
+func (u *updateAltair) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *updateAltair) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}
+
+type updateCapella struct {
+	p                       *pb.LightClientUpdateCapella
+	attestedHeader          interfaces.LightClientHeader
+	nextSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranch
+	finalizedHeader         interfaces.LightClientHeader
+	finalityBranch          interfaces.LightClientFinalityBranch
+}
+
+var _ interfaces.LightClientUpdate = &updateCapella{}
+
+func NewWrappedUpdateCapella(p *pb.LightClientUpdateCapella) (interfaces.LightClientUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderCapella(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeaderCapella(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
+		"sync committee",
+		p.NextSyncCommitteeBranch,
+		fieldparams.SyncCommitteeBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+	finalityBranch, err := createBranch[interfaces.LightClientFinalityBranch](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &updateCapella{
+		p:                       p,
+		attestedHeader:          attestedHeader,
+		nextSyncCommitteeBranch: scBranch,
+		finalizedHeader:         finalizedHeader,
+		finalityBranch:          finalityBranch,
+	}, nil
+}
+
+func (u *updateCapella) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *updateCapella) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *updateCapella) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *updateCapella) Version() int {
+	return version.Capella
+}
+
+func (u *updateCapella) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *updateCapella) NextSyncCommittee() *pb.SyncCommittee {
+	return u.p.NextSyncCommittee
+}
+
+func (u *updateCapella) NextSyncCommitteeBranch() interfaces.LightClientSyncCommitteeBranch {
+	return u.nextSyncCommitteeBranch
+}
+
+func (u *updateCapella) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *updateCapella) FinalityBranch() interfaces.LightClientFinalityBranch {
+	return u.finalityBranch
+}
+
+func (u *updateCapella) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *updateCapella) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}
+
+type updateDeneb struct {
+	p                       *pb.LightClientUpdateDeneb
+	attestedHeader          interfaces.LightClientHeader
+	nextSyncCommitteeBranch interfaces.LightClientSyncCommitteeBranch
+	finalizedHeader         interfaces.LightClientHeader
+	finalityBranch          interfaces.LightClientFinalityBranch
+}
+
+var _ interfaces.LightClientUpdate = &updateDeneb{}
+
+func NewWrappedUpdateDeneb(p *pb.LightClientUpdateDeneb) (interfaces.LightClientUpdate, error) {
+	if p == nil {
+		return nil, consensustypes.ErrNilObjectWrapped
+	}
+	attestedHeader, err := NewWrappedHeaderDeneb(p.AttestedHeader)
+	if err != nil {
+		return nil, err
+	}
+	finalizedHeader, err := NewWrappedHeaderDeneb(p.FinalizedHeader)
+	if err != nil {
+		return nil, err
+	}
+	scBranch, err := createBranch[interfaces.LightClientSyncCommitteeBranch](
+		"sync committee",
+		p.NextSyncCommitteeBranch,
+		fieldparams.SyncCommitteeBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+	finalityBranch, err := createBranch[interfaces.LightClientFinalityBranch](
+		"finality",
+		p.FinalityBranch,
+		fieldparams.FinalityBranchDepth,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &updateDeneb{
+		p:                       p,
+		attestedHeader:          attestedHeader,
+		nextSyncCommitteeBranch: scBranch,
+		finalizedHeader:         finalizedHeader,
+		finalityBranch:          finalityBranch,
+	}, nil
+}
+
+func (u *updateDeneb) MarshalSSZTo(dst []byte) ([]byte, error) {
+	return u.p.MarshalSSZTo(dst)
+}
+
+func (u *updateDeneb) MarshalSSZ() ([]byte, error) {
+	return u.p.MarshalSSZ()
+}
+
+func (u *updateDeneb) SizeSSZ() int {
+	return u.p.SizeSSZ()
+}
+
+func (u *updateDeneb) Version() int {
+	return version.Deneb
+}
+
+func (u *updateDeneb) AttestedHeader() interfaces.LightClientHeader {
+	return u.attestedHeader
+}
+
+func (u *updateDeneb) NextSyncCommittee() *pb.SyncCommittee {
+	return u.p.NextSyncCommittee
+}
+
+func (u *updateDeneb) NextSyncCommitteeBranch() interfaces.LightClientSyncCommitteeBranch {
+	return u.nextSyncCommitteeBranch
+}
+
+func (u *updateDeneb) FinalizedHeader() interfaces.LightClientHeader {
+	return u.finalizedHeader
+}
+
+func (u *updateDeneb) FinalityBranch() interfaces.LightClientFinalityBranch {
+	return u.finalityBranch
+}
+
+func (u *updateDeneb) SyncAggregate() *pb.SyncAggregate {
+	return u.p.SyncAggregate
+}
+
+func (u *updateDeneb) SignatureSlot() primitives.Slot {
+	return u.p.SignatureSlot
+}

consensus-types/primitives/BUILD.bazel

@@ -9,6 +9,7 @@ go_library(
         "domain.go",
         "epoch.go",
         "execution_address.go",
+        "kzg.go",
         "payload_id.go",
         "randao.go",
         "slot.go",
@@ -21,6 +22,7 @@ go_library(
     visibility = ["//visibility:public"],
     deps = [
         "//math:go_default_library",
+        "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_prysmaticlabs_fastssz//:go_default_library",
         "@com_github_prysmaticlabs_go_bitfield//:go_default_library",
     ],

consensus-types/primitives/kzg.go

@@ -0,0 +1,15 @@
+package primitives
+
+import (
+	"crypto/sha256"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+const blobCommitmentVersionKZG uint8 = 0x01
+
+func ConvertKzgCommitmentToVersionedHash(commitment []byte) common.Hash {
+	versionedHash := sha256.Sum256(commitment)
+	versionedHash[0] = blobCommitmentVersionKZG
+	return versionedHash
+}

deps.bzl

@@ -2781,8 +2781,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_prysmaticlabs_fastssz",
         importpath = "github.com/prysmaticlabs/fastssz",
-        sum = "h1:0LZAwwHnsZFfXm4IK4rzFV4N5IVSKZKLmuBMA4kAlFk=",
-        version = "v0.0.0-20240620202422-a981b8ef89d3",
+        sum = "h1:xuVAdtz5ShYblG2sPyb4gw01DF8InbOI/kBCQjk7NiM=",
+        version = "v0.0.0-20241008181541-518c4ce73516",
     )
     go_repository(
         name = "com_github_prysmaticlabs_go_bitfield",

go.mod

@@ -62,7 +62,7 @@ require (
 	github.com/prometheus/client_golang v1.20.0
 	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/prom2json v1.3.0
-	github.com/prysmaticlabs/fastssz v0.0.0-20240620202422-a981b8ef89d3
+	github.com/prysmaticlabs/fastssz v0.0.0-20241008181541-518c4ce73516
 	github.com/prysmaticlabs/go-bitfield v0.0.0-20240328144219-a1caa50c3a1e
 	github.com/prysmaticlabs/prombbolt v0.0.0-20210126082820-9b7adba6db7c
 	github.com/prysmaticlabs/protoc-gen-go-cast v0.0.0-20230228205207-28762a7b9294

go.sum

@@ -897,8 +897,8 @@ github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0leargg
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
 github.com/prometheus/prom2json v1.3.0 h1:BlqrtbT9lLH3ZsOVhXPsHzFrApCTKRifB7gjJuypu6Y=
 github.com/prometheus/prom2json v1.3.0/go.mod h1:rMN7m0ApCowcoDlypBHlkNbp5eJQf/+1isKykIP5ZnM=
-github.com/prysmaticlabs/fastssz v0.0.0-20240620202422-a981b8ef89d3 h1:0LZAwwHnsZFfXm4IK4rzFV4N5IVSKZKLmuBMA4kAlFk=
-github.com/prysmaticlabs/fastssz v0.0.0-20240620202422-a981b8ef89d3/go.mod h1:h2OlIZD/M6wFvV3YMZbW16lFgh3Rsye00G44J2cwLyU=
+github.com/prysmaticlabs/fastssz v0.0.0-20241008181541-518c4ce73516 h1:xuVAdtz5ShYblG2sPyb4gw01DF8InbOI/kBCQjk7NiM=
+github.com/prysmaticlabs/fastssz v0.0.0-20241008181541-518c4ce73516/go.mod h1:h2OlIZD/M6wFvV3YMZbW16lFgh3Rsye00G44J2cwLyU=
 github.com/prysmaticlabs/go-bitfield v0.0.0-20210108222456-8e92c3709aa0/go.mod h1:hCwmef+4qXWjv0jLDbQdWnL0Ol7cS7/lCSS26WR+u6s=
 github.com/prysmaticlabs/go-bitfield v0.0.0-20240328144219-a1caa50c3a1e h1:ATgOe+abbzfx9kCPeXIW4fiWyDdxlwHw07j8UGhdTd4=
 github.com/prysmaticlabs/go-bitfield v0.0.0-20240328144219-a1caa50c3a1e/go.mod h1:wmuf/mdK4VMD+jA9ThwcUKjg3a2XWM9cVfFYjDyY4j4=

proto/eth/v1/gateway.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 13c946aa898cca1afa84687b619bc5a10fc79a46340e98dcfb07dde835d39a0c
+// Hash: 2874e1dadeb47411763f48fe31e5daaa91ac663e796933d9a508c2e7be94fa5e
 package v1
 
 import (
@@ -2395,7 +2395,10 @@ func (v *Validator) UnmarshalSSZ(buf []byte) error {
 	v.EffectiveBalance = ssz.UnmarshallUint64(buf[80:88])
 
 	// Field (3) 'Slashed'
-	v.Slashed = ssz.UnmarshalBool(buf[88:89])
+	v.Slashed, err = ssz.DecodeBool(buf[88:89])
+	if err != nil {
+		return err
+	}
 
 	// Field (4) 'ActivationEligibilityEpoch'
 	v.ActivationEligibilityEpoch = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Epoch(ssz.UnmarshallUint64(buf[89:97]))

proto/eth/v2/grpc.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: bc8a0f7f6c8dadac6bcb0eaab2dea4888cc44c5b3f4fe9998a71e15f1a059399
+// Hash: 298a6e797d2a244a4eee0e60b198b11fd30b4b8596a8a5b911dd2e14fafebdad
 package eth
 
 import (

proto/prysm/v1alpha1/BUILD.bazel

@@ -81,6 +81,11 @@ ssz_altair_objs = [
     "BeaconBlockBodyAltair",
     "BeaconStateAltair",
     "ContributionAndProof",
+    "LightClientBootstrapAltair",
+    "LightClientFinalityUpdateAltair",
+    "LightClientHeaderAltair",
+    "LightClientOptimisticUpdateAltair",
+    "LightClientUpdateAltair",
     "SignedBeaconBlockAltair",
     "SignedContributionAndProof",
     "SyncAggregate",
@@ -110,6 +115,11 @@ ssz_capella_objs = [
     "BlindedBeaconBlockCapella",
     "BuilderBidCapella",
     "HistoricalSummary",
+    "LightClientBootstrapCapella",
+    "LightClientFinalityUpdateCapella",
+    "LightClientHeaderCapella",
+    "LightClientOptimisticUpdateCapella",
+    "LightClientUpdateCapella",
     "SignedBLSToExecutionChange",
     "SignedBeaconBlockCapella",
     "SignedBlindedBeaconBlockCapella",
@@ -127,6 +137,11 @@ ssz_deneb_objs = [
     "BlobSidecar",
     "BlobSidecars",
     "BuilderBidDeneb",
+    "LightClientBootstrapDeneb",
+    "LightClientFinalityUpdateDeneb",
+    "LightClientHeaderDeneb",
+    "LightClientOptimisticUpdateDeneb",
+    "LightClientUpdateDeneb",
     "SignedBeaconBlockContentsDeneb",
     "SignedBeaconBlockDeneb",
     "SignedBlindedBeaconBlockDeneb",
@@ -334,6 +349,7 @@ ssz_proto_files(
         "beacon_block.proto",
         "beacon_state.proto",
         "blobs.proto",
+        "light_client.proto",
         "sync_committee.proto",
         "withdrawals.proto",
     ],

proto/prysm/v1alpha1/altair.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: bb838fc0c2dfdadd4a8274dd1b438b1051f7b84d7c8e7470900621284dba8f43
+// Hash: 18a07a11eb3d1daaafe0b6b1ac8934e9333ea6eceed7d5ef30166b9c2fb50d39
 package eth
 
 import (
@@ -1747,6 +1747,651 @@ func (s *SyncAggregatorSelectionData) HashTreeRootWith(hh *ssz.Hasher) (err erro
 	return
 }
 
+// MarshalSSZ ssz marshals the LightClientHeaderAltair object
+func (l *LightClientHeaderAltair) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientHeaderAltair object to a target array
+func (l *LightClientHeaderAltair) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'Beacon'
+	if l.Beacon == nil {
+		l.Beacon = new(BeaconBlockHeader)
+	}
+	if dst, err = l.Beacon.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientHeaderAltair object
+func (l *LightClientHeaderAltair) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 112 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'Beacon'
+	if l.Beacon == nil {
+		l.Beacon = new(BeaconBlockHeader)
+	}
+	if err = l.Beacon.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientHeaderAltair object
+func (l *LightClientHeaderAltair) SizeSSZ() (size int) {
+	size = 112
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientHeaderAltair object
+func (l *LightClientHeaderAltair) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientHeaderAltair object with a hasher
+func (l *LightClientHeaderAltair) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Beacon'
+	if err = l.Beacon.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientBootstrapAltair object
+func (l *LightClientBootstrapAltair) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientBootstrapAltair object to a target array
+func (l *LightClientBootstrapAltair) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'Header'
+	if l.Header == nil {
+		l.Header = new(LightClientHeaderAltair)
+	}
+	if dst, err = l.Header.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if l.CurrentSyncCommittee == nil {
+		l.CurrentSyncCommittee = new(SyncCommittee)
+	}
+	if dst, err = l.CurrentSyncCommittee.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	if size := len(l.CurrentSyncCommitteeBranch); size != 5 {
+		err = ssz.ErrVectorLengthFn("--.CurrentSyncCommitteeBranch", size, 5)
+		return
+	}
+	for ii := 0; ii < 5; ii++ {
+		if size := len(l.CurrentSyncCommitteeBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.CurrentSyncCommitteeBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.CurrentSyncCommitteeBranch[ii]...)
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientBootstrapAltair object
+func (l *LightClientBootstrapAltair) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 24896 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'Header'
+	if l.Header == nil {
+		l.Header = new(LightClientHeaderAltair)
+	}
+	if err = l.Header.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if l.CurrentSyncCommittee == nil {
+		l.CurrentSyncCommittee = new(SyncCommittee)
+	}
+	if err = l.CurrentSyncCommittee.UnmarshalSSZ(buf[112:24736]); err != nil {
+		return err
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	l.CurrentSyncCommitteeBranch = make([][]byte, 5)
+	for ii := 0; ii < 5; ii++ {
+		if cap(l.CurrentSyncCommitteeBranch[ii]) == 0 {
+			l.CurrentSyncCommitteeBranch[ii] = make([]byte, 0, len(buf[24736:24896][ii*32:(ii+1)*32]))
+		}
+		l.CurrentSyncCommitteeBranch[ii] = append(l.CurrentSyncCommitteeBranch[ii], buf[24736:24896][ii*32:(ii+1)*32]...)
+	}
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientBootstrapAltair object
+func (l *LightClientBootstrapAltair) SizeSSZ() (size int) {
+	size = 24896
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientBootstrapAltair object
+func (l *LightClientBootstrapAltair) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientBootstrapAltair object with a hasher
+func (l *LightClientBootstrapAltair) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Header'
+	if err = l.Header.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if err = l.CurrentSyncCommittee.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	{
+		if size := len(l.CurrentSyncCommitteeBranch); size != 5 {
+			err = ssz.ErrVectorLengthFn("--.CurrentSyncCommitteeBranch", size, 5)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.CurrentSyncCommitteeBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientUpdateAltair object
+func (l *LightClientUpdateAltair) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientUpdateAltair object to a target array
+func (l *LightClientUpdateAltair) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderAltair)
+	}
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if l.NextSyncCommittee == nil {
+		l.NextSyncCommittee = new(SyncCommittee)
+	}
+	if dst, err = l.NextSyncCommittee.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	if size := len(l.NextSyncCommitteeBranch); size != 5 {
+		err = ssz.ErrVectorLengthFn("--.NextSyncCommitteeBranch", size, 5)
+		return
+	}
+	for ii := 0; ii < 5; ii++ {
+		if size := len(l.NextSyncCommitteeBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.NextSyncCommitteeBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.NextSyncCommitteeBranch[ii]...)
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderAltair)
+	}
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (4) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size != 6 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		return
+	}
+	for ii := 0; ii < 6; ii++ {
+		if size := len(l.FinalityBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (6) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientUpdateAltair object
+func (l *LightClientUpdateAltair) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 25368 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderAltair)
+	}
+	if err = l.AttestedHeader.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if l.NextSyncCommittee == nil {
+		l.NextSyncCommittee = new(SyncCommittee)
+	}
+	if err = l.NextSyncCommittee.UnmarshalSSZ(buf[112:24736]); err != nil {
+		return err
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	l.NextSyncCommitteeBranch = make([][]byte, 5)
+	for ii := 0; ii < 5; ii++ {
+		if cap(l.NextSyncCommitteeBranch[ii]) == 0 {
+			l.NextSyncCommitteeBranch[ii] = make([]byte, 0, len(buf[24736:24896][ii*32:(ii+1)*32]))
+		}
+		l.NextSyncCommitteeBranch[ii] = append(l.NextSyncCommitteeBranch[ii], buf[24736:24896][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderAltair)
+	}
+	if err = l.FinalizedHeader.UnmarshalSSZ(buf[24896:25008]); err != nil {
+		return err
+	}
+
+	// Field (4) 'FinalityBranch'
+	l.FinalityBranch = make([][]byte, 6)
+	for ii := 0; ii < 6; ii++ {
+		if cap(l.FinalityBranch[ii]) == 0 {
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[25008:25200][ii*32:(ii+1)*32]))
+		}
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[25008:25200][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[25200:25360]); err != nil {
+		return err
+	}
+
+	// Field (6) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[25360:25368]))
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientUpdateAltair object
+func (l *LightClientUpdateAltair) SizeSSZ() (size int) {
+	size = 25368
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientUpdateAltair object
+func (l *LightClientUpdateAltair) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientUpdateAltair object with a hasher
+func (l *LightClientUpdateAltair) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if err = l.NextSyncCommittee.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	{
+		if size := len(l.NextSyncCommitteeBranch); size != 5 {
+			err = ssz.ErrVectorLengthFn("--.NextSyncCommitteeBranch", size, 5)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.NextSyncCommitteeBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'FinalityBranch'
+	{
+		if size := len(l.FinalityBranch); size != 6 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.FinalityBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (6) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientFinalityUpdateAltair object
+func (l *LightClientFinalityUpdateAltair) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientFinalityUpdateAltair object to a target array
+func (l *LightClientFinalityUpdateAltair) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderAltair)
+	}
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderAltair)
+	}
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size != 6 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		return
+	}
+	for ii := 0; ii < 6; ii++ {
+		if size := len(l.FinalityBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientFinalityUpdateAltair object
+func (l *LightClientFinalityUpdateAltair) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 584 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderAltair)
+	}
+	if err = l.AttestedHeader.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderAltair)
+	}
+	if err = l.FinalizedHeader.UnmarshalSSZ(buf[112:224]); err != nil {
+		return err
+	}
+
+	// Field (2) 'FinalityBranch'
+	l.FinalityBranch = make([][]byte, 6)
+	for ii := 0; ii < 6; ii++ {
+		if cap(l.FinalityBranch[ii]) == 0 {
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[224:416][ii*32:(ii+1)*32]))
+		}
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[224:416][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[416:576]); err != nil {
+		return err
+	}
+
+	// Field (4) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[576:584]))
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientFinalityUpdateAltair object
+func (l *LightClientFinalityUpdateAltair) SizeSSZ() (size int) {
+	size = 584
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientFinalityUpdateAltair object
+func (l *LightClientFinalityUpdateAltair) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientFinalityUpdateAltair object with a hasher
+func (l *LightClientFinalityUpdateAltair) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'FinalityBranch'
+	{
+		if size := len(l.FinalityBranch); size != 6 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.FinalityBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientOptimisticUpdateAltair object
+func (l *LightClientOptimisticUpdateAltair) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientOptimisticUpdateAltair object to a target array
+func (l *LightClientOptimisticUpdateAltair) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderAltair)
+	}
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientOptimisticUpdateAltair object
+func (l *LightClientOptimisticUpdateAltair) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 280 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderAltair)
+	}
+	if err = l.AttestedHeader.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	// Field (1) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[112:272]); err != nil {
+		return err
+	}
+
+	// Field (2) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[272:280]))
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientOptimisticUpdateAltair object
+func (l *LightClientOptimisticUpdateAltair) SizeSSZ() (size int) {
+	size = 280
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientOptimisticUpdateAltair object
+func (l *LightClientOptimisticUpdateAltair) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientOptimisticUpdateAltair object with a hasher
+func (l *LightClientOptimisticUpdateAltair) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
 // MarshalSSZ ssz marshals the SyncCommitteeMessage object
 func (s *SyncCommitteeMessage) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(s)

proto/prysm/v1alpha1/bellatrix.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 693cad07de8560b2681132d912aebb927e668fe15e5cb9f42e8a36bbac6e2c5e
+// Hash: c6614861443f105e2d5445ca29187cc78c2a929161d0a15b36ce2f0e6517a0ea
 package eth
 
 import (

proto/prysm/v1alpha1/capella.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: a5507ef7d71897486989f37eb4dbb19fc2c49e7c47f244291a9f3122c9bfe546
+// Hash: 6bee0cf7c5707af68be518a221b248ce37edd4b0b1e6fec9703c6152a5107a1d
 package eth
 
 import (
@@ -2729,6 +2729,877 @@ func (h *HistoricalSummary) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	return
 }
 
+// MarshalSSZ ssz marshals the LightClientHeaderCapella object
+func (l *LightClientHeaderCapella) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientHeaderCapella object to a target array
+func (l *LightClientHeaderCapella) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(244)
+
+	// Field (0) 'Beacon'
+	if l.Beacon == nil {
+		l.Beacon = new(BeaconBlockHeader)
+	}
+	if dst, err = l.Beacon.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Offset (1) 'Execution'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.Execution == nil {
+		l.Execution = new(v1.ExecutionPayloadHeaderCapella)
+	}
+	offset += l.Execution.SizeSSZ()
+
+	// Field (2) 'ExecutionBranch'
+	if size := len(l.ExecutionBranch); size != 4 {
+		err = ssz.ErrVectorLengthFn("--.ExecutionBranch", size, 4)
+		return
+	}
+	for ii := 0; ii < 4; ii++ {
+		if size := len(l.ExecutionBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.ExecutionBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.ExecutionBranch[ii]...)
+	}
+
+	// Field (1) 'Execution'
+	if dst, err = l.Execution.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientHeaderCapella object
+func (l *LightClientHeaderCapella) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 244 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o1 uint64
+
+	// Field (0) 'Beacon'
+	if l.Beacon == nil {
+		l.Beacon = new(BeaconBlockHeader)
+	}
+	if err = l.Beacon.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	// Offset (1) 'Execution'
+	if o1 = ssz.ReadOffset(buf[112:116]); o1 > size {
+		return ssz.ErrOffset
+	}
+
+	if o1 != 244 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (2) 'ExecutionBranch'
+	l.ExecutionBranch = make([][]byte, 4)
+	for ii := 0; ii < 4; ii++ {
+		if cap(l.ExecutionBranch[ii]) == 0 {
+			l.ExecutionBranch[ii] = make([]byte, 0, len(buf[116:244][ii*32:(ii+1)*32]))
+		}
+		l.ExecutionBranch[ii] = append(l.ExecutionBranch[ii], buf[116:244][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (1) 'Execution'
+	{
+		buf = tail[o1:]
+		if l.Execution == nil {
+			l.Execution = new(v1.ExecutionPayloadHeaderCapella)
+		}
+		if err = l.Execution.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientHeaderCapella object
+func (l *LightClientHeaderCapella) SizeSSZ() (size int) {
+	size = 244
+
+	// Field (1) 'Execution'
+	if l.Execution == nil {
+		l.Execution = new(v1.ExecutionPayloadHeaderCapella)
+	}
+	size += l.Execution.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientHeaderCapella object
+func (l *LightClientHeaderCapella) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientHeaderCapella object with a hasher
+func (l *LightClientHeaderCapella) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Beacon'
+	if err = l.Beacon.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'Execution'
+	if err = l.Execution.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'ExecutionBranch'
+	{
+		if size := len(l.ExecutionBranch); size != 4 {
+			err = ssz.ErrVectorLengthFn("--.ExecutionBranch", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.ExecutionBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientBootstrapCapella object
+func (l *LightClientBootstrapCapella) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientBootstrapCapella object to a target array
+func (l *LightClientBootstrapCapella) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(24788)
+
+	// Offset (0) 'Header'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.Header == nil {
+		l.Header = new(LightClientHeaderCapella)
+	}
+	offset += l.Header.SizeSSZ()
+
+	// Field (1) 'CurrentSyncCommittee'
+	if l.CurrentSyncCommittee == nil {
+		l.CurrentSyncCommittee = new(SyncCommittee)
+	}
+	if dst, err = l.CurrentSyncCommittee.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	if size := len(l.CurrentSyncCommitteeBranch); size != 5 {
+		err = ssz.ErrVectorLengthFn("--.CurrentSyncCommitteeBranch", size, 5)
+		return
+	}
+	for ii := 0; ii < 5; ii++ {
+		if size := len(l.CurrentSyncCommitteeBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.CurrentSyncCommitteeBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.CurrentSyncCommitteeBranch[ii]...)
+	}
+
+	// Field (0) 'Header'
+	if dst, err = l.Header.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientBootstrapCapella object
+func (l *LightClientBootstrapCapella) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 24788 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0 uint64
+
+	// Offset (0) 'Header'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 24788 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if l.CurrentSyncCommittee == nil {
+		l.CurrentSyncCommittee = new(SyncCommittee)
+	}
+	if err = l.CurrentSyncCommittee.UnmarshalSSZ(buf[4:24628]); err != nil {
+		return err
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	l.CurrentSyncCommitteeBranch = make([][]byte, 5)
+	for ii := 0; ii < 5; ii++ {
+		if cap(l.CurrentSyncCommitteeBranch[ii]) == 0 {
+			l.CurrentSyncCommitteeBranch[ii] = make([]byte, 0, len(buf[24628:24788][ii*32:(ii+1)*32]))
+		}
+		l.CurrentSyncCommitteeBranch[ii] = append(l.CurrentSyncCommitteeBranch[ii], buf[24628:24788][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (0) 'Header'
+	{
+		buf = tail[o0:]
+		if l.Header == nil {
+			l.Header = new(LightClientHeaderCapella)
+		}
+		if err = l.Header.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientBootstrapCapella object
+func (l *LightClientBootstrapCapella) SizeSSZ() (size int) {
+	size = 24788
+
+	// Field (0) 'Header'
+	if l.Header == nil {
+		l.Header = new(LightClientHeaderCapella)
+	}
+	size += l.Header.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientBootstrapCapella object
+func (l *LightClientBootstrapCapella) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientBootstrapCapella object with a hasher
+func (l *LightClientBootstrapCapella) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Header'
+	if err = l.Header.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if err = l.CurrentSyncCommittee.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	{
+		if size := len(l.CurrentSyncCommitteeBranch); size != 5 {
+			err = ssz.ErrVectorLengthFn("--.CurrentSyncCommitteeBranch", size, 5)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.CurrentSyncCommitteeBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientUpdateCapella object
+func (l *LightClientUpdateCapella) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientUpdateCapella object to a target array
+func (l *LightClientUpdateCapella) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(25152)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderCapella)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'NextSyncCommittee'
+	if l.NextSyncCommittee == nil {
+		l.NextSyncCommittee = new(SyncCommittee)
+	}
+	if dst, err = l.NextSyncCommittee.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	if size := len(l.NextSyncCommitteeBranch); size != 5 {
+		err = ssz.ErrVectorLengthFn("--.NextSyncCommitteeBranch", size, 5)
+		return
+	}
+	for ii := 0; ii < 5; ii++ {
+		if size := len(l.NextSyncCommitteeBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.NextSyncCommitteeBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.NextSyncCommitteeBranch[ii]...)
+	}
+
+	// Offset (3) 'FinalizedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderCapella)
+	}
+	offset += l.FinalizedHeader.SizeSSZ()
+
+	// Field (4) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size != 6 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		return
+	}
+	for ii := 0; ii < 6; ii++ {
+		if size := len(l.FinalityBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (6) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientUpdateCapella object
+func (l *LightClientUpdateCapella) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 25152 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o3 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 25152 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if l.NextSyncCommittee == nil {
+		l.NextSyncCommittee = new(SyncCommittee)
+	}
+	if err = l.NextSyncCommittee.UnmarshalSSZ(buf[4:24628]); err != nil {
+		return err
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	l.NextSyncCommitteeBranch = make([][]byte, 5)
+	for ii := 0; ii < 5; ii++ {
+		if cap(l.NextSyncCommitteeBranch[ii]) == 0 {
+			l.NextSyncCommitteeBranch[ii] = make([]byte, 0, len(buf[24628:24788][ii*32:(ii+1)*32]))
+		}
+		l.NextSyncCommitteeBranch[ii] = append(l.NextSyncCommitteeBranch[ii], buf[24628:24788][ii*32:(ii+1)*32]...)
+	}
+
+	// Offset (3) 'FinalizedHeader'
+	if o3 = ssz.ReadOffset(buf[24788:24792]); o3 > size || o0 > o3 {
+		return ssz.ErrOffset
+	}
+
+	// Field (4) 'FinalityBranch'
+	l.FinalityBranch = make([][]byte, 6)
+	for ii := 0; ii < 6; ii++ {
+		if cap(l.FinalityBranch[ii]) == 0 {
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[24792:24984][ii*32:(ii+1)*32]))
+		}
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[24792:24984][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[24984:25144]); err != nil {
+		return err
+	}
+
+	// Field (6) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[25144:25152]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:o3]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderCapella)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (3) 'FinalizedHeader'
+	{
+		buf = tail[o3:]
+		if l.FinalizedHeader == nil {
+			l.FinalizedHeader = new(LightClientHeaderCapella)
+		}
+		if err = l.FinalizedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientUpdateCapella object
+func (l *LightClientUpdateCapella) SizeSSZ() (size int) {
+	size = 25152
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderCapella)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	// Field (3) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderCapella)
+	}
+	size += l.FinalizedHeader.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientUpdateCapella object
+func (l *LightClientUpdateCapella) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientUpdateCapella object with a hasher
+func (l *LightClientUpdateCapella) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if err = l.NextSyncCommittee.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	{
+		if size := len(l.NextSyncCommitteeBranch); size != 5 {
+			err = ssz.ErrVectorLengthFn("--.NextSyncCommitteeBranch", size, 5)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.NextSyncCommitteeBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'FinalityBranch'
+	{
+		if size := len(l.FinalityBranch); size != 6 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.FinalityBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (6) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientFinalityUpdateCapella object
+func (l *LightClientFinalityUpdateCapella) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientFinalityUpdateCapella object to a target array
+func (l *LightClientFinalityUpdateCapella) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(368)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderCapella)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Offset (1) 'FinalizedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderCapella)
+	}
+	offset += l.FinalizedHeader.SizeSSZ()
+
+	// Field (2) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size != 6 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		return
+	}
+	for ii := 0; ii < 6; ii++ {
+		if size := len(l.FinalityBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientFinalityUpdateCapella object
+func (l *LightClientFinalityUpdateCapella) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 368 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o1 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 368 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (1) 'FinalizedHeader'
+	if o1 = ssz.ReadOffset(buf[4:8]); o1 > size || o0 > o1 {
+		return ssz.ErrOffset
+	}
+
+	// Field (2) 'FinalityBranch'
+	l.FinalityBranch = make([][]byte, 6)
+	for ii := 0; ii < 6; ii++ {
+		if cap(l.FinalityBranch[ii]) == 0 {
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[8:200][ii*32:(ii+1)*32]))
+		}
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[8:200][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[200:360]); err != nil {
+		return err
+	}
+
+	// Field (4) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[360:368]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:o1]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderCapella)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (1) 'FinalizedHeader'
+	{
+		buf = tail[o1:]
+		if l.FinalizedHeader == nil {
+			l.FinalizedHeader = new(LightClientHeaderCapella)
+		}
+		if err = l.FinalizedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientFinalityUpdateCapella object
+func (l *LightClientFinalityUpdateCapella) SizeSSZ() (size int) {
+	size = 368
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderCapella)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderCapella)
+	}
+	size += l.FinalizedHeader.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientFinalityUpdateCapella object
+func (l *LightClientFinalityUpdateCapella) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientFinalityUpdateCapella object with a hasher
+func (l *LightClientFinalityUpdateCapella) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'FinalityBranch'
+	{
+		if size := len(l.FinalityBranch); size != 6 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.FinalityBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientOptimisticUpdateCapella object
+func (l *LightClientOptimisticUpdateCapella) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientOptimisticUpdateCapella object to a target array
+func (l *LightClientOptimisticUpdateCapella) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(172)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderCapella)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientOptimisticUpdateCapella object
+func (l *LightClientOptimisticUpdateCapella) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 172 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 172 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[4:164]); err != nil {
+		return err
+	}
+
+	// Field (2) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[164:172]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderCapella)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientOptimisticUpdateCapella object
+func (l *LightClientOptimisticUpdateCapella) SizeSSZ() (size int) {
+	size = 172
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderCapella)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientOptimisticUpdateCapella object
+func (l *LightClientOptimisticUpdateCapella) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientOptimisticUpdateCapella object with a hasher
+func (l *LightClientOptimisticUpdateCapella) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
 // MarshalSSZ ssz marshals the BLSToExecutionChange object
 func (b *BLSToExecutionChange) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(b)

proto/prysm/v1alpha1/deneb.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 4c3e6932bf84838e8de21e5c121c14d03cbccb051c3990d3b924932f531f4d30
+// Hash: dc56f26fb2603482588d88426187e889583abce2eeb7556ac0dc1ebaa891c455
 package eth
 
 import (
@@ -3593,3 +3593,874 @@ func (b *BlobIdentifier) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	hh.Merkleize(indx)
 	return
 }
+
+// MarshalSSZ ssz marshals the LightClientHeaderDeneb object
+func (l *LightClientHeaderDeneb) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientHeaderDeneb object to a target array
+func (l *LightClientHeaderDeneb) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(244)
+
+	// Field (0) 'Beacon'
+	if l.Beacon == nil {
+		l.Beacon = new(BeaconBlockHeader)
+	}
+	if dst, err = l.Beacon.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Offset (1) 'Execution'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.Execution == nil {
+		l.Execution = new(v1.ExecutionPayloadHeaderDeneb)
+	}
+	offset += l.Execution.SizeSSZ()
+
+	// Field (2) 'ExecutionBranch'
+	if size := len(l.ExecutionBranch); size != 4 {
+		err = ssz.ErrVectorLengthFn("--.ExecutionBranch", size, 4)
+		return
+	}
+	for ii := 0; ii < 4; ii++ {
+		if size := len(l.ExecutionBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.ExecutionBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.ExecutionBranch[ii]...)
+	}
+
+	// Field (1) 'Execution'
+	if dst, err = l.Execution.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientHeaderDeneb object
+func (l *LightClientHeaderDeneb) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 244 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o1 uint64
+
+	// Field (0) 'Beacon'
+	if l.Beacon == nil {
+		l.Beacon = new(BeaconBlockHeader)
+	}
+	if err = l.Beacon.UnmarshalSSZ(buf[0:112]); err != nil {
+		return err
+	}
+
+	// Offset (1) 'Execution'
+	if o1 = ssz.ReadOffset(buf[112:116]); o1 > size {
+		return ssz.ErrOffset
+	}
+
+	if o1 != 244 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (2) 'ExecutionBranch'
+	l.ExecutionBranch = make([][]byte, 4)
+	for ii := 0; ii < 4; ii++ {
+		if cap(l.ExecutionBranch[ii]) == 0 {
+			l.ExecutionBranch[ii] = make([]byte, 0, len(buf[116:244][ii*32:(ii+1)*32]))
+		}
+		l.ExecutionBranch[ii] = append(l.ExecutionBranch[ii], buf[116:244][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (1) 'Execution'
+	{
+		buf = tail[o1:]
+		if l.Execution == nil {
+			l.Execution = new(v1.ExecutionPayloadHeaderDeneb)
+		}
+		if err = l.Execution.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientHeaderDeneb object
+func (l *LightClientHeaderDeneb) SizeSSZ() (size int) {
+	size = 244
+
+	// Field (1) 'Execution'
+	if l.Execution == nil {
+		l.Execution = new(v1.ExecutionPayloadHeaderDeneb)
+	}
+	size += l.Execution.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientHeaderDeneb object
+func (l *LightClientHeaderDeneb) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientHeaderDeneb object with a hasher
+func (l *LightClientHeaderDeneb) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Beacon'
+	if err = l.Beacon.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'Execution'
+	if err = l.Execution.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'ExecutionBranch'
+	{
+		if size := len(l.ExecutionBranch); size != 4 {
+			err = ssz.ErrVectorLengthFn("--.ExecutionBranch", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.ExecutionBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientBootstrapDeneb object
+func (l *LightClientBootstrapDeneb) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientBootstrapDeneb object to a target array
+func (l *LightClientBootstrapDeneb) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(24788)
+
+	// Offset (0) 'Header'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.Header == nil {
+		l.Header = new(LightClientHeaderDeneb)
+	}
+	offset += l.Header.SizeSSZ()
+
+	// Field (1) 'CurrentSyncCommittee'
+	if l.CurrentSyncCommittee == nil {
+		l.CurrentSyncCommittee = new(SyncCommittee)
+	}
+	if dst, err = l.CurrentSyncCommittee.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	if size := len(l.CurrentSyncCommitteeBranch); size != 5 {
+		err = ssz.ErrVectorLengthFn("--.CurrentSyncCommitteeBranch", size, 5)
+		return
+	}
+	for ii := 0; ii < 5; ii++ {
+		if size := len(l.CurrentSyncCommitteeBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.CurrentSyncCommitteeBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.CurrentSyncCommitteeBranch[ii]...)
+	}
+
+	// Field (0) 'Header'
+	if dst, err = l.Header.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientBootstrapDeneb object
+func (l *LightClientBootstrapDeneb) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 24788 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0 uint64
+
+	// Offset (0) 'Header'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 24788 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if l.CurrentSyncCommittee == nil {
+		l.CurrentSyncCommittee = new(SyncCommittee)
+	}
+	if err = l.CurrentSyncCommittee.UnmarshalSSZ(buf[4:24628]); err != nil {
+		return err
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	l.CurrentSyncCommitteeBranch = make([][]byte, 5)
+	for ii := 0; ii < 5; ii++ {
+		if cap(l.CurrentSyncCommitteeBranch[ii]) == 0 {
+			l.CurrentSyncCommitteeBranch[ii] = make([]byte, 0, len(buf[24628:24788][ii*32:(ii+1)*32]))
+		}
+		l.CurrentSyncCommitteeBranch[ii] = append(l.CurrentSyncCommitteeBranch[ii], buf[24628:24788][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (0) 'Header'
+	{
+		buf = tail[o0:]
+		if l.Header == nil {
+			l.Header = new(LightClientHeaderDeneb)
+		}
+		if err = l.Header.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientBootstrapDeneb object
+func (l *LightClientBootstrapDeneb) SizeSSZ() (size int) {
+	size = 24788
+
+	// Field (0) 'Header'
+	if l.Header == nil {
+		l.Header = new(LightClientHeaderDeneb)
+	}
+	size += l.Header.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientBootstrapDeneb object
+func (l *LightClientBootstrapDeneb) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientBootstrapDeneb object with a hasher
+func (l *LightClientBootstrapDeneb) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Header'
+	if err = l.Header.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'CurrentSyncCommittee'
+	if err = l.CurrentSyncCommittee.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'CurrentSyncCommitteeBranch'
+	{
+		if size := len(l.CurrentSyncCommitteeBranch); size != 5 {
+			err = ssz.ErrVectorLengthFn("--.CurrentSyncCommitteeBranch", size, 5)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.CurrentSyncCommitteeBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientUpdateDeneb object
+func (l *LightClientUpdateDeneb) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientUpdateDeneb object to a target array
+func (l *LightClientUpdateDeneb) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(25152)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'NextSyncCommittee'
+	if l.NextSyncCommittee == nil {
+		l.NextSyncCommittee = new(SyncCommittee)
+	}
+	if dst, err = l.NextSyncCommittee.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	if size := len(l.NextSyncCommitteeBranch); size != 5 {
+		err = ssz.ErrVectorLengthFn("--.NextSyncCommitteeBranch", size, 5)
+		return
+	}
+	for ii := 0; ii < 5; ii++ {
+		if size := len(l.NextSyncCommitteeBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.NextSyncCommitteeBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.NextSyncCommitteeBranch[ii]...)
+	}
+
+	// Offset (3) 'FinalizedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.FinalizedHeader.SizeSSZ()
+
+	// Field (4) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size != 6 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		return
+	}
+	for ii := 0; ii < 6; ii++ {
+		if size := len(l.FinalityBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (6) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientUpdateDeneb object
+func (l *LightClientUpdateDeneb) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 25152 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o3 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 25152 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if l.NextSyncCommittee == nil {
+		l.NextSyncCommittee = new(SyncCommittee)
+	}
+	if err = l.NextSyncCommittee.UnmarshalSSZ(buf[4:24628]); err != nil {
+		return err
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	l.NextSyncCommitteeBranch = make([][]byte, 5)
+	for ii := 0; ii < 5; ii++ {
+		if cap(l.NextSyncCommitteeBranch[ii]) == 0 {
+			l.NextSyncCommitteeBranch[ii] = make([]byte, 0, len(buf[24628:24788][ii*32:(ii+1)*32]))
+		}
+		l.NextSyncCommitteeBranch[ii] = append(l.NextSyncCommitteeBranch[ii], buf[24628:24788][ii*32:(ii+1)*32]...)
+	}
+
+	// Offset (3) 'FinalizedHeader'
+	if o3 = ssz.ReadOffset(buf[24788:24792]); o3 > size || o0 > o3 {
+		return ssz.ErrOffset
+	}
+
+	// Field (4) 'FinalityBranch'
+	l.FinalityBranch = make([][]byte, 6)
+	for ii := 0; ii < 6; ii++ {
+		if cap(l.FinalityBranch[ii]) == 0 {
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[24792:24984][ii*32:(ii+1)*32]))
+		}
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[24792:24984][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[24984:25144]); err != nil {
+		return err
+	}
+
+	// Field (6) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[25144:25152]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:o3]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (3) 'FinalizedHeader'
+	{
+		buf = tail[o3:]
+		if l.FinalizedHeader == nil {
+			l.FinalizedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.FinalizedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientUpdateDeneb object
+func (l *LightClientUpdateDeneb) SizeSSZ() (size int) {
+	size = 25152
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	// Field (3) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.FinalizedHeader.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientUpdateDeneb object
+func (l *LightClientUpdateDeneb) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientUpdateDeneb object with a hasher
+func (l *LightClientUpdateDeneb) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'NextSyncCommittee'
+	if err = l.NextSyncCommittee.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'NextSyncCommitteeBranch'
+	{
+		if size := len(l.NextSyncCommitteeBranch); size != 5 {
+			err = ssz.ErrVectorLengthFn("--.NextSyncCommitteeBranch", size, 5)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.NextSyncCommitteeBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (3) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'FinalityBranch'
+	{
+		if size := len(l.FinalityBranch); size != 6 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.FinalityBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (5) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (6) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientFinalityUpdateDeneb object
+func (l *LightClientFinalityUpdateDeneb) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientFinalityUpdateDeneb object to a target array
+func (l *LightClientFinalityUpdateDeneb) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(368)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Offset (1) 'FinalizedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.FinalizedHeader.SizeSSZ()
+
+	// Field (2) 'FinalityBranch'
+	if size := len(l.FinalityBranch); size != 6 {
+		err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+		return
+	}
+	for ii := 0; ii < 6; ii++ {
+		if size := len(l.FinalityBranch[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.FinalityBranch[ii]", size, 32)
+			return
+		}
+		dst = append(dst, l.FinalityBranch[ii]...)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if dst, err = l.FinalizedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientFinalityUpdateDeneb object
+func (l *LightClientFinalityUpdateDeneb) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 368 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o1 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 368 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (1) 'FinalizedHeader'
+	if o1 = ssz.ReadOffset(buf[4:8]); o1 > size || o0 > o1 {
+		return ssz.ErrOffset
+	}
+
+	// Field (2) 'FinalityBranch'
+	l.FinalityBranch = make([][]byte, 6)
+	for ii := 0; ii < 6; ii++ {
+		if cap(l.FinalityBranch[ii]) == 0 {
+			l.FinalityBranch[ii] = make([]byte, 0, len(buf[8:200][ii*32:(ii+1)*32]))
+		}
+		l.FinalityBranch[ii] = append(l.FinalityBranch[ii], buf[8:200][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[200:360]); err != nil {
+		return err
+	}
+
+	// Field (4) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[360:368]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:o1]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (1) 'FinalizedHeader'
+	{
+		buf = tail[o1:]
+		if l.FinalizedHeader == nil {
+			l.FinalizedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.FinalizedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientFinalityUpdateDeneb object
+func (l *LightClientFinalityUpdateDeneb) SizeSSZ() (size int) {
+	size = 368
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'FinalizedHeader'
+	if l.FinalizedHeader == nil {
+		l.FinalizedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.FinalizedHeader.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientFinalityUpdateDeneb object
+func (l *LightClientFinalityUpdateDeneb) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientFinalityUpdateDeneb object with a hasher
+func (l *LightClientFinalityUpdateDeneb) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'FinalizedHeader'
+	if err = l.FinalizedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'FinalityBranch'
+	{
+		if size := len(l.FinalityBranch); size != 6 {
+			err = ssz.ErrVectorLengthFn("--.FinalityBranch", size, 6)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range l.FinalityBranch {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+		hh.Merkleize(subIndx)
+	}
+
+	// Field (3) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (4) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}
+
+// MarshalSSZ ssz marshals the LightClientOptimisticUpdateDeneb object
+func (l *LightClientOptimisticUpdateDeneb) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(l)
+}
+
+// MarshalSSZTo ssz marshals the LightClientOptimisticUpdateDeneb object to a target array
+func (l *LightClientOptimisticUpdateDeneb) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(172)
+
+	// Offset (0) 'AttestedHeader'
+	dst = ssz.WriteOffset(dst, offset)
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	offset += l.AttestedHeader.SizeSSZ()
+
+	// Field (1) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if dst, err = l.SyncAggregate.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'SignatureSlot'
+	dst = ssz.MarshalUint64(dst, uint64(l.SignatureSlot))
+
+	// Field (0) 'AttestedHeader'
+	if dst, err = l.AttestedHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the LightClientOptimisticUpdateDeneb object
+func (l *LightClientOptimisticUpdateDeneb) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 172 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0 uint64
+
+	// Offset (0) 'AttestedHeader'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 != 172 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'SyncAggregate'
+	if l.SyncAggregate == nil {
+		l.SyncAggregate = new(SyncAggregate)
+	}
+	if err = l.SyncAggregate.UnmarshalSSZ(buf[4:164]); err != nil {
+		return err
+	}
+
+	// Field (2) 'SignatureSlot'
+	l.SignatureSlot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[164:172]))
+
+	// Field (0) 'AttestedHeader'
+	{
+		buf = tail[o0:]
+		if l.AttestedHeader == nil {
+			l.AttestedHeader = new(LightClientHeaderDeneb)
+		}
+		if err = l.AttestedHeader.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the LightClientOptimisticUpdateDeneb object
+func (l *LightClientOptimisticUpdateDeneb) SizeSSZ() (size int) {
+	size = 172
+
+	// Field (0) 'AttestedHeader'
+	if l.AttestedHeader == nil {
+		l.AttestedHeader = new(LightClientHeaderDeneb)
+	}
+	size += l.AttestedHeader.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the LightClientOptimisticUpdateDeneb object
+func (l *LightClientOptimisticUpdateDeneb) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(l)
+}
+
+// HashTreeRootWith ssz hashes the LightClientOptimisticUpdateDeneb object with a hasher
+func (l *LightClientOptimisticUpdateDeneb) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AttestedHeader'
+	if err = l.AttestedHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'SyncAggregate'
+	if err = l.SyncAggregate.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'SignatureSlot'
+	hh.PutUint64(uint64(l.SignatureSlot))
+
+	hh.Merkleize(indx)
+	return
+}

proto/prysm/v1alpha1/electra.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 8009dff4967583f3039317182cf9c9f5c46922f00fe10c357d9d32b0a264e28b
+// Hash: 3a2dbf56ebf4e81fbf961840a4cd2addac9047b17c12bad04e60879df5b69277
 package eth
 
 import (

proto/prysm/v1alpha1/light_client.proto

@@ -0,0 +1,134 @@
+// Copyright 2024 Prysmatic Labs.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+syntax = "proto3";
+
+package ethereum.eth.v1alpha1;
+
+import "proto/eth/ext/options.proto";
+import "proto/prysm/v1alpha1/beacon_block.proto";
+import "proto/engine/v1/execution_engine.proto";
+import "proto/prysm/v1alpha1/beacon_state.proto";
+
+option csharp_namespace = "Ethereum.Eth.V1alpha1";
+option go_package = "github.com/prysmaticlabs/prysm/v5/proto/eth/v1alpha1;eth";
+option java_multiple_files = true;
+option java_outer_classname = "LightClientProto";
+option java_package = "org.ethereum.eth.v1alpha1";
+option php_namespace = "Ethereum\\Eth\\v1alpha1";
+
+message LightClientHeaderAltair {
+  BeaconBlockHeader beacon = 1;
+}
+
+message LightClientHeaderCapella {
+  BeaconBlockHeader beacon = 1;
+  ethereum.engine.v1.ExecutionPayloadHeaderCapella execution = 2;
+  repeated bytes execution_branch = 3 [(ethereum.eth.ext.ssz_size) = "4,32"];
+}
+
+message LightClientHeaderDeneb {
+  BeaconBlockHeader beacon = 1;
+  ethereum.engine.v1.ExecutionPayloadHeaderDeneb execution = 2;
+  repeated bytes execution_branch = 3 [(ethereum.eth.ext.ssz_size) = "4,32"];
+}
+
+message LightClientBootstrapAltair {
+  LightClientHeaderAltair header = 1;
+  SyncCommittee current_sync_committee = 2;
+  repeated bytes current_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "5,32"];
+}
+
+message LightClientBootstrapCapella {
+  LightClientHeaderCapella header = 1;
+  SyncCommittee current_sync_committee = 2;
+  repeated bytes current_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "5,32"];
+}
+
+message LightClientBootstrapDeneb {
+  LightClientHeaderDeneb header = 1;
+  SyncCommittee current_sync_committee = 2;
+  repeated bytes current_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "5,32"];
+}
+
+message LightClientUpdateAltair {
+  LightClientHeaderAltair attested_header = 1;
+  SyncCommittee next_sync_committee = 2;
+  repeated bytes next_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "5,32"];
+  LightClientHeaderAltair finalized_header = 4;
+  repeated bytes finality_branch = 5 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  SyncAggregate sync_aggregate = 6;
+  uint64 signature_slot = 7 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientUpdateCapella {
+  LightClientHeaderCapella attested_header = 1;
+  SyncCommittee next_sync_committee = 2;
+  repeated bytes next_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "5,32"];
+  LightClientHeaderCapella finalized_header = 4;
+  repeated bytes finality_branch = 5 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  SyncAggregate sync_aggregate = 6;
+  uint64 signature_slot = 7 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientUpdateDeneb {
+  LightClientHeaderDeneb attested_header = 1;
+  SyncCommittee next_sync_committee = 2;
+  repeated bytes next_sync_committee_branch = 3 [(ethereum.eth.ext.ssz_size) = "5,32"];
+  LightClientHeaderDeneb finalized_header = 4;
+  repeated bytes finality_branch = 5 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  SyncAggregate sync_aggregate = 6;
+  uint64 signature_slot = 7 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientFinalityUpdateAltair {
+  LightClientHeaderAltair attested_header = 1;
+  LightClientHeaderAltair finalized_header = 2;
+  repeated bytes finality_branch = 3 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  SyncAggregate sync_aggregate = 4;
+  uint64 signature_slot = 5 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientFinalityUpdateCapella {
+  LightClientHeaderCapella attested_header = 1;
+  LightClientHeaderCapella finalized_header = 2;
+  repeated bytes finality_branch = 3 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  SyncAggregate sync_aggregate = 4;
+  uint64 signature_slot = 5 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientFinalityUpdateDeneb {
+  LightClientHeaderDeneb attested_header = 1;
+  LightClientHeaderDeneb finalized_header = 2;
+  repeated bytes finality_branch = 3 [(ethereum.eth.ext.ssz_size) = "6,32"];
+  SyncAggregate sync_aggregate = 4;
+  uint64 signature_slot = 5 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientOptimisticUpdateAltair {
+  LightClientHeaderAltair attested_header = 1;
+  SyncAggregate sync_aggregate = 2;
+  uint64 signature_slot = 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientOptimisticUpdateCapella {
+  LightClientHeaderCapella attested_header = 1;
+  SyncAggregate sync_aggregate = 2;
+  uint64 signature_slot = 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}
+
+message LightClientOptimisticUpdateDeneb {
+  LightClientHeaderDeneb attested_header = 1;
+  SyncAggregate sync_aggregate = 2;
+  uint64 signature_slot = 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+}

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

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 4cb7a5705004491db2ef29a5080a4cc56a1b618de948a86f9e5275858b48e6c4
+// Hash: bfd7d6b556134c3bd236b880245717aa01ae79573b33f2746a08c165ba5dcedb
 package eth
 
 import (

proto/prysm/v1alpha1/phase0.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 0afa289ce68dc2913d8000d495c6069832f35b66a6c0cf1bb0d1299fcad7047a
+// Hash: 5797213d138ec1a089f9dae2198cab6f4f829ac0cc1f0bda2633fff544db4e68
 package eth
 
 import (
@@ -3979,7 +3979,10 @@ func (v *Validator) UnmarshalSSZ(buf []byte) error {
 	v.EffectiveBalance = ssz.UnmarshallUint64(buf[80:88])
 
 	// Field (3) 'Slashed'
-	v.Slashed = ssz.UnmarshalBool(buf[88:89])
+	v.Slashed, err = ssz.DecodeBool(buf[88:89])
+	if err != nil {
+		return err
+	}
 
 	// Field (4) 'ActivationEligibilityEpoch'
 	v.ActivationEligibilityEpoch = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Epoch(ssz.UnmarshallUint64(buf[89:97]))

testing/util/lightclient.go

@@ -456,6 +456,118 @@ func (l *TestLightClient) SetupTestDeneb(blinded bool) *TestLightClient {
 	return l
 }
 
+func (l *TestLightClient) SetupTestElectra(blinded bool) *TestLightClient {
+	ctx := context.Background()
+
+	slot := primitives.Slot(params.BeaconConfig().ElectraForkEpoch * primitives.Epoch(params.BeaconConfig().SlotsPerEpoch)).Add(1)
+
+	attestedState, err := NewBeaconStateElectra()
+	require.NoError(l.T, err)
+	err = attestedState.SetSlot(slot)
+	require.NoError(l.T, err)
+
+	finalizedBlock, err := blocks.NewSignedBeaconBlock(NewBeaconBlockElectra())
+	require.NoError(l.T, err)
+	finalizedBlock.SetSlot(1)
+	finalizedHeader, err := finalizedBlock.Header()
+	require.NoError(l.T, err)
+	finalizedRoot, err := finalizedHeader.Header.HashTreeRoot()
+	require.NoError(l.T, err)
+
+	require.NoError(l.T, attestedState.SetFinalizedCheckpoint(&ethpb.Checkpoint{
+		Epoch: params.BeaconConfig().ElectraForkEpoch - 10,
+		Root:  finalizedRoot[:],
+	}))
+
+	parent := NewBeaconBlockElectra()
+	parent.Block.Slot = slot
+
+	signedParent, err := blocks.NewSignedBeaconBlock(parent)
+	require.NoError(l.T, err)
+
+	parentHeader, err := signedParent.Header()
+	require.NoError(l.T, err)
+	attestedHeader := parentHeader.Header
+
+	err = attestedState.SetLatestBlockHeader(attestedHeader)
+	require.NoError(l.T, err)
+	attestedStateRoot, err := attestedState.HashTreeRoot(ctx)
+	require.NoError(l.T, err)
+
+	// get a new signed block so the root is updated with the new state root
+	parent.Block.StateRoot = attestedStateRoot[:]
+	signedParent, err = blocks.NewSignedBeaconBlock(parent)
+	require.NoError(l.T, err)
+
+	state, err := NewBeaconStateElectra()
+	require.NoError(l.T, err)
+	err = state.SetSlot(slot)
+	require.NoError(l.T, err)
+
+	parentRoot, err := signedParent.Block().HashTreeRoot()
+	require.NoError(l.T, err)
+
+	var signedBlock interfaces.SignedBeaconBlock
+	if blinded {
+		block := NewBlindedBeaconBlockElectra()
+		block.Message.Slot = slot
+		block.Message.ParentRoot = parentRoot[:]
+
+		for i := uint64(0); i < params.BeaconConfig().MinSyncCommitteeParticipants; i++ {
+			block.Message.Body.SyncAggregate.SyncCommitteeBits.SetBitAt(i, true)
+		}
+
+		signedBlock, err = blocks.NewSignedBeaconBlock(block)
+		require.NoError(l.T, err)
+
+		h, err := signedBlock.Header()
+		require.NoError(l.T, err)
+
+		err = state.SetLatestBlockHeader(h.Header)
+		require.NoError(l.T, err)
+		stateRoot, err := state.HashTreeRoot(ctx)
+		require.NoError(l.T, err)
+
+		// get a new signed block so the root is updated with the new state root
+		block.Message.StateRoot = stateRoot[:]
+		signedBlock, err = blocks.NewSignedBeaconBlock(block)
+		require.NoError(l.T, err)
+	} else {
+		block := NewBeaconBlockElectra()
+		block.Block.Slot = slot
+		block.Block.ParentRoot = parentRoot[:]
+
+		for i := uint64(0); i < params.BeaconConfig().MinSyncCommitteeParticipants; i++ {
+			block.Block.Body.SyncAggregate.SyncCommitteeBits.SetBitAt(i, true)
+		}
+
+		signedBlock, err = blocks.NewSignedBeaconBlock(block)
+		require.NoError(l.T, err)
+
+		h, err := signedBlock.Header()
+		require.NoError(l.T, err)
+
+		err = state.SetLatestBlockHeader(h.Header)
+		require.NoError(l.T, err)
+		stateRoot, err := state.HashTreeRoot(ctx)
+		require.NoError(l.T, err)
+
+		// get a new signed block so the root is updated with the new state root
+		block.Block.StateRoot = stateRoot[:]
+		signedBlock, err = blocks.NewSignedBeaconBlock(block)
+		require.NoError(l.T, err)
+	}
+
+	l.State = state
+	l.AttestedState = attestedState
+	l.AttestedBlock = signedParent
+	l.Block = signedBlock
+	l.Ctx = ctx
+	l.FinalizedBlock = finalizedBlock
+
+	return l
+}
+
 func (l *TestLightClient) SetupTestDenebFinalizedBlockCapella(blinded bool) *TestLightClient {
 	ctx := context.Background()
 

validator/client/validator.go

@@ -1262,13 +1262,16 @@ func (v *validator) updateValidatorStatusCache(ctx context.Context, pubkeys [][f
 	if len(resp.Statuses) != len(resp.Indices) {
 		return fmt.Errorf("expected %d indices in status, received %d", len(resp.Statuses), len(resp.Indices))
 	}
+	pubkeyToStatus := make(map[[fieldparams.BLSPubkeyLength]byte]*validatorStatus, len(resp.Statuses))
 	for i, s := range resp.Statuses {
-		v.pubkeyToStatus[bytesutil.ToBytes48(resp.PublicKeys[i])] = &validatorStatus{
+		pubkeyToStatus[bytesutil.ToBytes48(resp.PublicKeys[i])] = &validatorStatus{
 			publicKey: resp.PublicKeys[i],
 			status:    s,
 			index:     resp.Indices[i],
 		}
 	}
+	v.pubkeyToStatus = pubkeyToStatus
+
 	return nil
 }
 

validator/client/validator_test.go

@@ -2908,3 +2908,63 @@ func TestValidator_ChangeHost(t *testing.T) {
 	v.ChangeHost()
 	assert.Equal(t, uint64(0), v.currentHostIndex)
 }
+
+func TestUpdateValidatorStatusCache(t *testing.T) {
+	ctx := context.Background()
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	pubkeys := [][fieldparams.BLSPubkeyLength]byte{
+		{0x01},
+		{0x02},
+	}
+	statusRequestKeys := [][]byte{
+		pubkeys[0][:],
+		pubkeys[1][:],
+	}
+
+	client := validatormock.NewMockValidatorClient(ctrl)
+	mockResponse := &ethpb.MultipleValidatorStatusResponse{
+		PublicKeys: statusRequestKeys,
+		Statuses: []*ethpb.ValidatorStatusResponse{
+			{
+				Status: ethpb.ValidatorStatus_ACTIVE,
+			}, {
+				Status: ethpb.ValidatorStatus_EXITING,
+			}},
+		Indices: []primitives.ValidatorIndex{1, 2},
+	}
+	client.EXPECT().MultipleValidatorStatus(
+		gomock.Any(),
+		gomock.Any()).Return(mockResponse, nil)
+
+	v := &validator{
+		validatorClient:  client,
+		beaconNodeHosts:  []string{"http://localhost:8080", "http://localhost:8081"},
+		currentHostIndex: 0,
+		pubkeyToStatus: map[[fieldparams.BLSPubkeyLength]byte]*validatorStatus{
+			[fieldparams.BLSPubkeyLength]byte{0x03}: &validatorStatus{ // add non existant key and status to cache, should be fully removed on update
+				publicKey: []byte{0x03},
+				status: &ethpb.ValidatorStatusResponse{
+					Status: ethpb.ValidatorStatus_ACTIVE,
+				},
+				index: 3,
+			},
+		},
+	}
+
+	err := v.updateValidatorStatusCache(ctx, pubkeys)
+	assert.NoError(t, err)
+
+	// make sure the nonexistant key is fully removed
+	_, ok := v.pubkeyToStatus[[fieldparams.BLSPubkeyLength]byte{0x03}]
+	require.Equal(t, false, ok)
+	// make sure we only have the added values
+	assert.Equal(t, 2, len(v.pubkeyToStatus))
+	for i, pk := range pubkeys {
+		status, exists := v.pubkeyToStatus[pk]
+		require.Equal(t, true, exists)
+		require.DeepEqual(t, pk[:], status.publicKey)
+		require.Equal(t, mockResponse.Statuses[i], status.status)
+		require.Equal(t, mockResponse.Indices[i], status.index)
+	}
+}