Revert "send bad withdrawals"

This reverts commit 6c9b7786a1.

DEPENDENCIES.md

@@ -1,4 +1,4 @@
-# Dependency Managagement in Prysm
+# Dependency Management in Prysm
 
 Prysm is go project with many complicated dependencies, including some c++ based libraries. There
 are two parts to Prysm's dependency management. Go modules and bazel managed dependencies. Be sure 
@@ -28,7 +28,7 @@ including complicated c++ dependencies.
 One key advantage of Bazel over vanilla `go build` is that Bazel automatically (re)builds generated
 pb.go files at build time when file changes are present in any protobuf definition file or after
 any updates to the protobuf compiler or other relevant dependencies. Vanilla go users should run
-the following scripts often to ensure their generated files are up to date. Further more, Prysm
+the following scripts often to ensure their generated files are up to date. Furthermore, Prysm
 generates SSZ marshal related code based on defined data structures. These generated files must
 also be updated and checked in as frequently.
 

WORKSPACE

@@ -188,7 +188,7 @@ filegroup(
     url = "https://github.com/eth-clients/slashing-protection-interchange-tests/archive/b8413ca42dc92308019d0d4db52c87e9e125c4e9.tar.gz",
 )
 
-consensus_spec_version = "v1.3.0-alpha.2"
+consensus_spec_version = "v1.3.0-rc.1"
 
 bls_test_version = "v0.1.1"
 
@@ -204,7 +204,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "a92c41058dc17ced811cc85570cd6f8af761aedfcbd2dd7dd4fb64ac961d76f9",
+    sha256 = "3d6fadb64674eb64a84fae6c2efa9949231ea91e7cb74ada9214097323e86569",
     url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
 )
 
@@ -220,7 +220,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "49a7944da92429ac8f41347f19837762247cdbf00e628c285d1b826e58e4096d",
+    sha256 = "54ffbcab1e77316a280e6f5a64c6ed62351e8f5678e6fa49340e49b9b5575e8e",
     url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
 )
 
@@ -236,7 +236,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "d19673e9cd55e0c8d45eefc33b60978e14c166d0e891976fcaa114085312adcb",
+    sha256 = "bb06d30ca533dc97d45f2367916ba9ff1b5af52f08a9d8c33bb7b1a61254094e",
     url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )
 
@@ -251,7 +251,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "a72b7457c403f6b76567d4d7bec19d01bedf7d5ef1d6f2c3a9e09ee86d401a14",
+    sha256 = "9d22246c00ec3907ef8dc3ddccdfe6f7153ce46df73deee0a0176fe7e4aa1126",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )

beacon-chain/blockchain/chain_info_test.go

@@ -125,7 +125,10 @@ func TestHeadSlot_CanRetrieve(t *testing.T) {
 	c := &Service{}
 	s, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{})
 	require.NoError(t, err)
-	c.head = &head{slot: 100, state: s}
+	b, err := blocks.NewSignedBeaconBlock(util.NewBeaconBlock())
+	require.NoError(t, err)
+	b.Block().SetSlot(100)
+	c.head = &head{block: b, state: s}
 	assert.Equal(t, types.Slot(100), c.HeadSlot())
 }
 
@@ -412,7 +415,7 @@ func TestService_IsOptimistic(t *testing.T) {
 	ctx := context.Background()
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, head: &head{slot: 101, root: [32]byte{'b'}}}
+	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, head: &head{root: [32]byte{'b'}}}
 	st, blkRoot, err := prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, c.cfg.ForkChoiceStore.InsertNode(ctx, st, blkRoot))
@@ -435,7 +438,7 @@ func TestService_IsOptimisticBeforeBellatrix(t *testing.T) {
 
 func TestService_IsOptimisticForRoot(t *testing.T) {
 	ctx := context.Background()
-	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, head: &head{slot: 101, root: [32]byte{'b'}}}
+	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}, head: &head{root: [32]byte{'b'}}}
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	st, blkRoot, err := prepareForkchoiceState(ctx, 100, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
@@ -453,7 +456,7 @@ func TestService_IsOptimisticForRoot(t *testing.T) {
 func TestService_IsOptimisticForRoot_DB(t *testing.T) {
 	beaconDB := testDB.SetupDB(t)
 	ctx := context.Background()
-	c := &Service{cfg: &config{BeaconDB: beaconDB, ForkChoiceStore: doublylinkedtree.New()}, head: &head{slot: 101, root: [32]byte{'b'}}}
+	c := &Service{cfg: &config{BeaconDB: beaconDB, ForkChoiceStore: doublylinkedtree.New()}, head: &head{root: [32]byte{'b'}}}
 	c.head = &head{root: params.BeaconConfig().ZeroHash}
 	b := util.NewBeaconBlock()
 	b.Block.Slot = 10
@@ -511,7 +514,7 @@ func TestService_IsOptimisticForRoot_DB(t *testing.T) {
 func TestService_IsOptimisticForRoot_DB_non_canonical(t *testing.T) {
 	beaconDB := testDB.SetupDB(t)
 	ctx := context.Background()
-	c := &Service{cfg: &config{BeaconDB: beaconDB, ForkChoiceStore: doublylinkedtree.New()}, head: &head{slot: 101, root: [32]byte{'b'}}}
+	c := &Service{cfg: &config{BeaconDB: beaconDB, ForkChoiceStore: doublylinkedtree.New()}, head: &head{root: [32]byte{'b'}}}
 	c.head = &head{root: params.BeaconConfig().ZeroHash}
 	b := util.NewBeaconBlock()
 	b.Block.Slot = 10

beacon-chain/blockchain/head.go

@@ -19,6 +19,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v3/math"
 	ethpbv1 "github.com/prysmaticlabs/prysm/v3/proto/eth/v1"
+	"github.com/prysmaticlabs/prysm/v3/runtime/version"
 	"github.com/prysmaticlabs/prysm/v3/time/slots"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
@@ -51,7 +52,6 @@ func (s *Service) UpdateAndSaveHeadWithBalances(ctx context.Context) error {
 
 // This defines the current chain service's view of head.
 type head struct {
-	slot  types.Slot                   // current head slot.
 	root  [32]byte                     // current head root.
 	block interfaces.SignedBeaconBlock // current head block.
 	state state.BeaconState            // current head state.
@@ -109,11 +109,21 @@ func (s *Service) saveHead(ctx context.Context, newHeadRoot [32]byte, headBlock
 		}
 		dis := headSlot + newHeadSlot - 2*forkSlot
 		dep := math.Max(uint64(headSlot-forkSlot), uint64(newHeadSlot-forkSlot))
+		oldWeight, err := s.ForkChoicer().Weight(oldHeadRoot)
+		if err != nil {
+			log.WithField("root", fmt.Sprintf("%#x", oldHeadRoot)).Warn("could not determine node weight")
+		}
+		newWeight, err := s.ForkChoicer().Weight(newHeadRoot)
+		if err != nil {
+			log.WithField("root", fmt.Sprintf("%#x", newHeadRoot)).Warn("could not determine node weight")
+		}
 		log.WithFields(logrus.Fields{
 			"newSlot":            fmt.Sprintf("%d", newHeadSlot),
 			"newRoot":            fmt.Sprintf("%#x", newHeadRoot),
+			"newWeight":          newWeight,
 			"oldSlot":            fmt.Sprintf("%d", headSlot),
 			"oldRoot":            fmt.Sprintf("%#x", oldHeadRoot),
+			"oldWeight":          oldWeight,
 			"commonAncestorRoot": fmt.Sprintf("%#x", commonRoot),
 			"distance":           dis,
 			"depth":              dep,
@@ -139,7 +149,7 @@ func (s *Service) saveHead(ctx context.Context, newHeadRoot [32]byte, headBlock
 			},
 		})
 
-		if err := s.saveOrphanedAtts(ctx, oldHeadRoot, newHeadRoot); err != nil {
+		if err := s.saveOrphanedOperations(ctx, oldHeadRoot, newHeadRoot); err != nil {
 			return err
 		}
 		reorgCount.Inc()
@@ -202,7 +212,6 @@ func (s *Service) setHead(root [32]byte, block interfaces.SignedBeaconBlock, sta
 		return err
 	}
 	s.head = &head{
-		slot:  block.Block().Slot(),
 		root:  root,
 		block: bCp,
 		state: state.Copy(),
@@ -223,7 +232,6 @@ func (s *Service) setHeadInitialSync(root [32]byte, block interfaces.SignedBeaco
 		return err
 	}
 	s.head = &head{
-		slot:  block.Block().Slot(),
 		root:  root,
 		block: bCp,
 		state: state,
@@ -234,7 +242,10 @@ func (s *Service) setHeadInitialSync(root [32]byte, block interfaces.SignedBeaco
 // This returns the head slot.
 // This is a lock free version.
 func (s *Service) headSlot() types.Slot {
-	return s.head.slot
+	if s.head == nil || s.head.block == nil || s.head.block.Block() == nil {
+		return 0
+	}
+	return s.head.block.Block().Slot()
 }
 
 // This returns the head root.
@@ -347,9 +358,9 @@ func (s *Service) notifyNewHeadEvent(
 	return nil
 }
 
-// This saves the attestations between `orphanedRoot` and the common ancestor root that is derived using `newHeadRoot`.
+// This saves the Attestations and BLSToExecChanges between `orphanedRoot` and the common ancestor root that is derived using `newHeadRoot`.
 // It also filters out the attestations that is one epoch older as a defense so invalid attestations don't flow into the attestation pool.
-func (s *Service) saveOrphanedAtts(ctx context.Context, orphanedRoot [32]byte, newHeadRoot [32]byte) error {
+func (s *Service) saveOrphanedOperations(ctx context.Context, orphanedRoot [32]byte, newHeadRoot [32]byte) error {
 	commonAncestorRoot, _, err := s.ForkChoicer().CommonAncestor(ctx, newHeadRoot, orphanedRoot)
 	switch {
 	// Exit early if there's no common ancestor and root doesn't exist, there would be nothing to save.
@@ -388,6 +399,15 @@ func (s *Service) saveOrphanedAtts(ctx context.Context, orphanedRoot [32]byte, n
 			}
 			saveOrphanedAttCount.Inc()
 		}
+		if orphanedBlk.Version() >= version.Capella {
+			changes, err := orphanedBlk.Block().Body().BLSToExecutionChanges()
+			if err != nil {
+				return errors.Wrap(err, "could not get BLSToExecutionChanges")
+			}
+			for _, c := range changes {
+				s.cfg.BLSToExecPool.InsertBLSToExecChange(c)
+			}
+		}
 		parentRoot := orphanedBlk.Block().ParentRoot()
 		orphanedRoot = bytesutil.ToBytes32(parentRoot[:])
 	}

beacon-chain/blockchain/head_test.go

@@ -10,6 +10,7 @@ import (
 	mock "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
 	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
 	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
 	"github.com/prysmaticlabs/prysm/v3/config/features"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
@@ -30,7 +31,7 @@ func TestSaveHead_Same(t *testing.T) {
 	service := setupBeaconChain(t, beaconDB)
 
 	r := [32]byte{'A'}
-	service.head = &head{slot: 0, root: r}
+	service.head = &head{root: r}
 	b, err := blocks.NewSignedBeaconBlock(util.NewBeaconBlock())
 	require.NoError(t, err)
 	st, _ := util.DeterministicGenesisState(t, 1)
@@ -53,7 +54,6 @@ func TestSaveHead_Different(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	service.head = &head{
-		slot:  0,
 		root:  oldRoot,
 		block: oldBlock,
 	}
@@ -107,7 +107,6 @@ func TestSaveHead_Different_Reorg(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	service.head = &head{
-		slot:  0,
 		root:  oldRoot,
 		block: oldBlock,
 	}
@@ -285,7 +284,7 @@ func TestSaveOrphanedAtts(t *testing.T) {
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}
 
-	require.NoError(t, service.saveOrphanedAtts(ctx, r3, r4))
+	require.NoError(t, service.saveOrphanedOperations(ctx, r3, r4))
 	require.Equal(t, 3, service.cfg.AttPool.AggregatedAttestationCount())
 	wantAtts := []*ethpb.Attestation{
 		blk3.Block.Body.Attestations[0],
@@ -303,31 +302,37 @@ func TestSaveOrphanedAtts_CanFilter(t *testing.T) {
 	ctx := context.Background()
 	beaconDB := testDB.SetupDB(t)
 	service := setupBeaconChain(t, beaconDB)
+	service.cfg.BLSToExecPool = blstoexec.NewPool()
 	service.genesisTime = time.Now().Add(time.Duration(-1*int64(params.BeaconConfig().SlotsPerEpoch+2)*int64(params.BeaconConfig().SecondsPerSlot)) * time.Second)
 
 	// Chain setup
 	// 0 -- 1 -- 2
 	//  \-4
-	st, keys := util.DeterministicGenesisState(t, 64)
-	blkG, err := util.GenerateFullBlock(st, keys, util.DefaultBlockGenConfig(), 0)
+	st, keys := util.DeterministicGenesisStateCapella(t, 64)
+	blkConfig := util.DefaultBlockGenConfig()
+	blkConfig.NumBLSChanges = 5
+	blkG, err := util.GenerateFullBlockCapella(st, keys, blkConfig, 1)
 	assert.NoError(t, err)
 	util.SaveBlock(t, ctx, service.cfg.BeaconDB, blkG)
 	rG, err := blkG.Block.HashTreeRoot()
 	require.NoError(t, err)
 
-	blk1, err := util.GenerateFullBlock(st, keys, util.DefaultBlockGenConfig(), 1)
+	blkConfig.NumBLSChanges = 10
+	blk1, err := util.GenerateFullBlockCapella(st, keys, blkConfig, 2)
 	assert.NoError(t, err)
 	blk1.Block.ParentRoot = rG[:]
 	r1, err := blk1.Block.HashTreeRoot()
 	require.NoError(t, err)
 
-	blk2, err := util.GenerateFullBlock(st, keys, util.DefaultBlockGenConfig(), 2)
+	blkConfig.NumBLSChanges = 15
+	blk2, err := util.GenerateFullBlockCapella(st, keys, blkConfig, 3)
 	assert.NoError(t, err)
 	blk2.Block.ParentRoot = r1[:]
 	r2, err := blk2.Block.HashTreeRoot()
 	require.NoError(t, err)
 
-	blk4 := util.NewBeaconBlock()
+	blk4 := util.NewBeaconBlockCapella()
+	blkConfig.NumBLSChanges = 0
 	blk4.Block.Slot = 4
 	blk4.Block.ParentRoot = rG[:]
 	r4, err := blk4.Block.HashTreeRoot()
@@ -335,7 +340,7 @@ func TestSaveOrphanedAtts_CanFilter(t *testing.T) {
 	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
 
-	for _, blk := range []*ethpb.SignedBeaconBlock{blkG, blk1, blk2, blk4} {
+	for _, blk := range []*ethpb.SignedBeaconBlockCapella{blkG, blk1, blk2, blk4} {
 		r, err := blk.Block.HashTreeRoot()
 		require.NoError(t, err)
 		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
@@ -344,8 +349,11 @@ func TestSaveOrphanedAtts_CanFilter(t *testing.T) {
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}
 
-	require.NoError(t, service.saveOrphanedAtts(ctx, r2, r4))
-	require.Equal(t, 0, service.cfg.AttPool.AggregatedAttestationCount())
+	require.NoError(t, service.saveOrphanedOperations(ctx, r2, r4))
+	require.Equal(t, 1, service.cfg.AttPool.AggregatedAttestationCount())
+	pending, err := service.cfg.BLSToExecPool.PendingBLSToExecChanges()
+	require.NoError(t, err)
+	require.Equal(t, 15, len(pending))
 }
 
 func TestSaveOrphanedAtts_DoublyLinkedTrie(t *testing.T) {
@@ -404,7 +412,7 @@ func TestSaveOrphanedAtts_DoublyLinkedTrie(t *testing.T) {
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}
 
-	require.NoError(t, service.saveOrphanedAtts(ctx, r3, r4))
+	require.NoError(t, service.saveOrphanedOperations(ctx, r3, r4))
 	require.Equal(t, 3, service.cfg.AttPool.AggregatedAttestationCount())
 	wantAtts := []*ethpb.Attestation{
 		blk3.Block.Body.Attestations[0],
@@ -468,7 +476,7 @@ func TestSaveOrphanedAtts_CanFilter_DoublyLinkedTrie(t *testing.T) {
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}
 
-	require.NoError(t, service.saveOrphanedAtts(ctx, r2, r4))
+	require.NoError(t, service.saveOrphanedOperations(ctx, r2, r4))
 	require.Equal(t, 0, service.cfg.AttPool.AggregatedAttestationCount())
 }
 

beacon-chain/blockchain/log.go

@@ -38,14 +38,14 @@ func logStateTransitionData(b interfaces.BeaconBlock) error {
 	if len(b.Body().VoluntaryExits()) > 0 {
 		log = log.WithField("voluntaryExits", len(b.Body().VoluntaryExits()))
 	}
-	if b.Version() == version.Altair || b.Version() == version.Bellatrix {
+	if b.Version() >= version.Altair {
 		agg, err := b.Body().SyncAggregate()
 		if err != nil {
 			return err
 		}
 		log = log.WithField("syncBitsCount", agg.SyncCommitteeBits.Count())
 	}
-	if b.Version() == version.Bellatrix {
+	if b.Version() >= version.Bellatrix {
 		p, err := b.Body().Execution()
 		if err != nil {
 			return err

beacon-chain/blockchain/metrics.go

@@ -317,9 +317,8 @@ func reportEpochMetrics(ctx context.Context, postState, headState state.BeaconSt
 	var b *precompute.Balance
 	var v []*precompute.Validator
 	var err error
-	switch headState.Version() {
-	case version.Phase0:
-		// Validator participation should be viewed on the canonical chain.
+
+	if headState.Version() == version.Phase0 {
 		v, b, err = precompute.New(ctx, headState)
 		if err != nil {
 			return err
@@ -328,7 +327,7 @@ func reportEpochMetrics(ctx context.Context, postState, headState state.BeaconSt
 		if err != nil {
 			return err
 		}
-	case version.Altair, version.Bellatrix, version.Capella:
+	} else if headState.Version() >= version.Altair {
 		v, b, err = altair.InitializePrecomputeValidators(ctx, headState)
 		if err != nil {
 			return err
@@ -337,9 +336,10 @@ func reportEpochMetrics(ctx context.Context, postState, headState state.BeaconSt
 		if err != nil {
 			return err
 		}
-	default:
+	} else {
 		return errors.Errorf("invalid state type provided: %T", headState.ToProtoUnsafe())
 	}
+
 	prevEpochActiveBalances.Set(float64(b.ActivePrevEpoch))
 	prevEpochSourceBalances.Set(float64(b.PrevEpochAttested))
 	prevEpochTargetBalances.Set(float64(b.PrevEpochTargetAttested))

beacon-chain/blockchain/receive_attestation_test.go

@@ -159,7 +159,6 @@ func TestNotifyEngineIfChangedHead(t *testing.T) {
 	require.NoError(t, service.saveInitSyncBlock(ctx, r1, wsb))
 	st, _ := util.DeterministicGenesisState(t, 1)
 	service.head = &head{
-		slot:  1,
 		root:  r1,
 		block: wsb,
 		state: st,
@@ -177,7 +176,6 @@ func TestNotifyEngineIfChangedHead(t *testing.T) {
 	require.NoError(t, err)
 	st, _ = util.DeterministicGenesisState(t, 1)
 	service.head = &head{
-		slot:  1,
 		root:  r1,
 		block: wsb,
 		state: st,

beacon-chain/cache/checkpoint_state.go

@@ -1,8 +1,6 @@
 package cache
 
 import (
-	"sync"
-
 	lru "github.com/hashicorp/golang-lru"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
@@ -32,7 +30,6 @@ var (
 // CheckpointStateCache is a struct with 1 queue for looking up state by checkpoint.
 type CheckpointStateCache struct {
 	cache *lru.Cache
-	lock  sync.RWMutex
 }
 
 // NewCheckpointStateCache creates a new checkpoint state cache for storing/accessing processed state.
@@ -45,8 +42,6 @@ func NewCheckpointStateCache() *CheckpointStateCache {
 // StateByCheckpoint fetches state by checkpoint. Returns true with a
 // reference to the CheckpointState info, if exists. Otherwise returns false, nil.
 func (c *CheckpointStateCache) StateByCheckpoint(cp *ethpb.Checkpoint) (state.BeaconState, error) {
-	c.lock.RLock()
-	defer c.lock.RUnlock()
 	h, err := hash.HashProto(cp)
 	if err != nil {
 		return nil, err
@@ -67,8 +62,6 @@ func (c *CheckpointStateCache) StateByCheckpoint(cp *ethpb.Checkpoint) (state.Be
 // AddCheckpointState adds CheckpointState object to the cache. This method also trims the least
 // recently added CheckpointState object if the cache size has ready the max cache size limit.
 func (c *CheckpointStateCache) AddCheckpointState(cp *ethpb.Checkpoint, s state.ReadOnlyBeaconState) error {
-	c.lock.Lock()
-	defer c.lock.Unlock()
 	h, err := hash.HashProto(cp)
 	if err != nil {
 		return err

beacon-chain/core/altair/transition.go

@@ -93,7 +93,7 @@ func ProcessEpoch(ctx context.Context, state state.BeaconState) (state.BeaconSta
 	if err != nil {
 		return nil, err
 	}
-	state, err = e.ProcessHistoricalRootsUpdate(state)
+	state, err = e.ProcessHistoricalDataUpdate(state)
 	if err != nil {
 		return nil, err
 	}

beacon-chain/core/altair/upgrade.go

@@ -67,6 +67,10 @@ func UpgradeToAltair(ctx context.Context, state state.BeaconState) (state.Beacon
 	epoch := time.CurrentEpoch(state)
 
 	numValidators := state.NumValidators()
+	hrs, err := state.HistoricalRoots()
+	if err != nil {
+		return nil, err
+	}
 	s := &ethpb.BeaconStateAltair{
 		GenesisTime:           state.GenesisTime(),
 		GenesisValidatorsRoot: state.GenesisValidatorsRoot(),
@@ -79,7 +83,7 @@ func UpgradeToAltair(ctx context.Context, state state.BeaconState) (state.Beacon
 		LatestBlockHeader:           state.LatestBlockHeader(),
 		BlockRoots:                  state.BlockRoots(),
 		StateRoots:                  state.StateRoots(),
-		HistoricalRoots:             state.HistoricalRoots(),
+		HistoricalRoots:             hrs,
 		Eth1Data:                    state.Eth1Data(),
 		Eth1DataVotes:               state.Eth1DataVotes(),
 		Eth1DepositIndex:            state.Eth1DepositIndex(),

beacon-chain/core/altair/upgrade_test.go

@@ -82,7 +82,11 @@ func TestUpgradeToAltair(t *testing.T) {
 	require.DeepSSZEqual(t, preForkState.LatestBlockHeader(), aState.LatestBlockHeader())
 	require.DeepSSZEqual(t, preForkState.BlockRoots(), aState.BlockRoots())
 	require.DeepSSZEqual(t, preForkState.StateRoots(), aState.StateRoots())
-	require.DeepSSZEqual(t, preForkState.HistoricalRoots(), aState.HistoricalRoots())
+	r1, err := preForkState.HistoricalRoots()
+	require.NoError(t, err)
+	r2, err := aState.HistoricalRoots()
+	require.NoError(t, err)
+	require.DeepSSZEqual(t, r1, r2)
 	require.DeepSSZEqual(t, preForkState.Eth1Data(), aState.Eth1Data())
 	require.DeepSSZEqual(t, preForkState.Eth1DataVotes(), aState.Eth1DataVotes())
 	require.DeepSSZEqual(t, preForkState.Eth1DepositIndex(), aState.Eth1DepositIndex())

beacon-chain/core/blocks/BUILD.bazel

@@ -41,6 +41,7 @@ go_library(
         "//math:go_default_library",
         "//network/forks:go_default_library",
         "//proto/engine/v1:go_default_library",
+        "//proto/eth/v2:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation:go_default_library",
         "//proto/prysm/v1alpha1/slashings:go_default_library",
@@ -98,6 +99,7 @@ go_test(
         "//encoding/bytesutil:go_default_library",
         "//encoding/ssz:go_default_library",
         "//proto/engine/v1:go_default_library",
+        "//proto/migration:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation:go_default_library",
         "//proto/prysm/v1alpha1/attestation/aggregation:go_default_library",

beacon-chain/core/blocks/attester_slashing.go

@@ -84,7 +84,7 @@ func ProcessAttesterSlashing(
 				slashingQuotient = cfg.MinSlashingPenaltyQuotient
 			case beaconState.Version() == version.Altair:
 				slashingQuotient = cfg.MinSlashingPenaltyQuotientAltair
-			case beaconState.Version() == version.Bellatrix, beaconState.Version() == version.Capella:
+			case beaconState.Version() >= version.Bellatrix:
 				slashingQuotient = cfg.MinSlashingPenaltyQuotientBellatrix
 			default:
 				return nil, errors.New("unknown state version")

beacon-chain/core/blocks/genesis.go

@@ -37,7 +37,7 @@ func NewGenesisBlock(stateRoot []byte) *ethpb.SignedBeaconBlock {
 	return block
 }
 
-var ErrUnrecognizedState = errors.New("uknonwn underlying type for state.BeaconState value")
+var ErrUnrecognizedState = errors.New("unknown underlying type for state.BeaconState value")
 
 func NewGenesisBlockForState(ctx context.Context, st state.BeaconState) (interfaces.SignedBeaconBlock, error) {
 	root, err := st.HashTreeRoot(ctx)
@@ -113,6 +113,38 @@ func NewGenesisBlockForState(ctx context.Context, st state.BeaconState) (interfa
 			},
 			Signature: params.BeaconConfig().EmptySignature[:],
 		})
+	case *ethpb.BeaconStateCapella:
+		return blocks.NewSignedBeaconBlock(&ethpb.SignedBeaconBlockCapella{
+			Block: &ethpb.BeaconBlockCapella{
+				ParentRoot: params.BeaconConfig().ZeroHash[:],
+				StateRoot:  root[:],
+				Body: &ethpb.BeaconBlockBodyCapella{
+					RandaoReveal: make([]byte, 96),
+					Eth1Data: &ethpb.Eth1Data{
+						DepositRoot: make([]byte, 32),
+						BlockHash:   make([]byte, 32),
+					},
+					Graffiti: make([]byte, 32),
+					SyncAggregate: &ethpb.SyncAggregate{
+						SyncCommitteeBits:      make([]byte, fieldparams.SyncCommitteeLength/8),
+						SyncCommitteeSignature: make([]byte, fieldparams.BLSSignatureLength),
+					},
+					ExecutionPayload: &enginev1.ExecutionPayloadCapella{
+						ParentHash:    make([]byte, 32),
+						FeeRecipient:  make([]byte, 20),
+						StateRoot:     make([]byte, 32),
+						ReceiptsRoot:  make([]byte, 32),
+						LogsBloom:     make([]byte, 256),
+						PrevRandao:    make([]byte, 32),
+						BaseFeePerGas: make([]byte, 32),
+						BlockHash:     make([]byte, 32),
+						Transactions:  make([][]byte, 0),
+						Withdrawals:   make([]*enginev1.Withdrawal, 0),
+					},
+				},
+			},
+			Signature: params.BeaconConfig().EmptySignature[:],
+		})
 	default:
 		return nil, ErrUnrecognizedState
 	}

beacon-chain/core/blocks/proposer_slashing.go

@@ -82,7 +82,7 @@ func ProcessProposerSlashing(
 		slashingQuotient = cfg.MinSlashingPenaltyQuotient
 	case beaconState.Version() == version.Altair:
 		slashingQuotient = cfg.MinSlashingPenaltyQuotientAltair
-	case beaconState.Version() == version.Bellatrix, beaconState.Version() == version.Capella:
+	case beaconState.Version() >= version.Bellatrix:
 		slashingQuotient = cfg.MinSlashingPenaltyQuotientBellatrix
 	default:
 		return nil, errors.New("unknown state version")

beacon-chain/core/blocks/withdrawals.go

@@ -14,9 +14,9 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/crypto/hash"
 	"github.com/prysmaticlabs/prysm/v3/encoding/ssz"
 	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
+	ethpbv2 "github.com/prysmaticlabs/prysm/v3/proto/eth/v2"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
 )
 
 const executionToBLSPadding = 12
@@ -175,20 +175,10 @@ func BLSChangesSignatureBatch(
 		Messages:     make([][32]byte, len(changes)),
 		Descriptions: make([]string, len(changes)),
 	}
-	epoch := slots.ToEpoch(st.Slot())
-	var fork *ethpb.Fork
-	if st.Version() < version.Capella {
-		fork = &ethpb.Fork{
-			PreviousVersion: params.BeaconConfig().BellatrixForkVersion,
-			CurrentVersion:  params.BeaconConfig().CapellaForkVersion,
-			Epoch:           params.BeaconConfig().CapellaForkEpoch,
-		}
-	} else {
-		fork = st.Fork()
-	}
-	domain, err := signing.Domain(fork, epoch, params.BeaconConfig().DomainBLSToExecutionChange, st.GenesisValidatorsRoot())
+	c := params.BeaconConfig()
+	domain, err := signing.ComputeDomain(c.DomainBLSToExecutionChange, c.GenesisForkVersion, st.GenesisValidatorsRoot())
 	if err != nil {
-		return nil, err
+		return nil, errors.Wrap(err, "could not compute signing domain")
 	}
 	for i, change := range changes {
 		batch.Signatures[i] = change.Signature
@@ -206,3 +196,19 @@ func BLSChangesSignatureBatch(
 	}
 	return batch, nil
 }
+
+// VerifyBLSChangeSignature checks the signature in the SignedBLSToExecutionChange message.
+// It validates the signature with the Capella fork version if the passed state
+// is from a previous fork.
+func VerifyBLSChangeSignature(
+	st state.BeaconState,
+	change *ethpbv2.SignedBLSToExecutionChange,
+) error {
+	c := params.BeaconConfig()
+	domain, err := signing.ComputeDomain(c.DomainBLSToExecutionChange, c.GenesisForkVersion, st.GenesisValidatorsRoot())
+	if err != nil {
+		return errors.Wrap(err, "could not compute signing domain")
+	}
+	publicKey := change.Message.FromBlsPubkey
+	return signing.VerifySigningRoot(change.Message, publicKey, change.Signature, domain)
+}

beacon-chain/core/blocks/withdrawals_test.go

@@ -17,6 +17,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/crypto/hash"
 	"github.com/prysmaticlabs/prysm/v3/encoding/ssz"
 	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
+	"github.com/prysmaticlabs/prysm/v3/proto/migration"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v3/testing/require"
 	"github.com/prysmaticlabs/prysm/v3/time/slots"
@@ -784,13 +785,18 @@ func TestBLSChangesSignatureBatch(t *testing.T) {
 	verify, err := batch.Verify()
 	require.NoError(t, err)
 	require.Equal(t, true, verify)
+
+	// Verify a single change
+	change := migration.V1Alpha1SignedBLSToExecChangeToV2(signedChanges[0])
+	require.NoError(t, blocks.VerifyBLSChangeSignature(st, change))
 }
 
-func TestBLSChangesSignatureBatchFromBellatrix(t *testing.T) {
-	spb := &ethpb.BeaconStateBellatrix{
+func TestBLSChangesSignatureBatchWrongFork(t *testing.T) {
+	spb := &ethpb.BeaconStateCapella{
 		Fork: &ethpb.Fork{
-			CurrentVersion:  params.BeaconConfig().AltairForkVersion,
+			CurrentVersion:  params.BeaconConfig().CapellaForkVersion,
 			PreviousVersion: params.BeaconConfig().BellatrixForkVersion,
+			Epoch:           params.BeaconConfig().CapellaForkEpoch,
 		},
 	}
 	numValidators := 10
@@ -801,6 +807,80 @@ func TestBLSChangesSignatureBatchFromBellatrix(t *testing.T) {
 	maxEffectiveBalance := params.BeaconConfig().MaxEffectiveBalance
 	executionAddress := []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13}
 
+	for i := range validators {
+		v := &ethpb.Validator{}
+		v.EffectiveBalance = maxEffectiveBalance
+		v.WithdrawableEpoch = params.BeaconConfig().FarFutureEpoch
+		v.WithdrawalCredentials = make([]byte, 32)
+		priv, err := bls.RandKey()
+		require.NoError(t, err)
+		privKeys[i] = priv
+		pubkey := priv.PublicKey().Marshal()
+
+		message := &ethpb.BLSToExecutionChange{
+			ToExecutionAddress: executionAddress,
+			ValidatorIndex:     types.ValidatorIndex(i),
+			FromBlsPubkey:      pubkey,
+		}
+
+		hashFn := ssz.NewHasherFunc(hash.CustomSHA256Hasher())
+		digest := hashFn.Hash(pubkey)
+		digest[0] = params.BeaconConfig().BLSWithdrawalPrefixByte
+		copy(v.WithdrawalCredentials, digest[:])
+		validators[i] = v
+		blsChanges[i] = message
+	}
+	spb.Validators = validators
+	st, err := state_native.InitializeFromProtoCapella(spb)
+	require.NoError(t, err)
+
+	signedChanges := make([]*ethpb.SignedBLSToExecutionChange, numValidators)
+	for i, message := range blsChanges {
+		signature, err := signing.ComputeDomainAndSign(st, time.CurrentEpoch(st), message, params.BeaconConfig().DomainBLSToExecutionChange, privKeys[i])
+		require.NoError(t, err)
+
+		signed := &ethpb.SignedBLSToExecutionChange{
+			Message:   message,
+			Signature: signature,
+		}
+		signedChanges[i] = signed
+	}
+	batch, err := blocks.BLSChangesSignatureBatch(st, signedChanges)
+	require.NoError(t, err)
+	verify, err := batch.Verify()
+	require.NoError(t, err)
+	require.Equal(t, false, verify)
+
+	// Verify a single change
+	change := migration.V1Alpha1SignedBLSToExecChangeToV2(signedChanges[0])
+	require.ErrorIs(t, signing.ErrSigFailedToVerify, blocks.VerifyBLSChangeSignature(st, change))
+}
+
+func TestBLSChangesSignatureBatchFromBellatrix(t *testing.T) {
+	cfg := params.BeaconConfig()
+	savedConfig := cfg.Copy()
+	cfg.CapellaForkEpoch = cfg.BellatrixForkEpoch.AddEpoch(2)
+	params.OverrideBeaconConfig(cfg)
+
+	spb := &ethpb.BeaconStateBellatrix{
+		Fork: &ethpb.Fork{
+			CurrentVersion:  params.BeaconConfig().BellatrixForkVersion,
+			PreviousVersion: params.BeaconConfig().AltairForkVersion,
+			Epoch:           params.BeaconConfig().BellatrixForkEpoch,
+		},
+	}
+	numValidators := 10
+	validators := make([]*ethpb.Validator, numValidators)
+	blsChanges := make([]*ethpb.BLSToExecutionChange, numValidators)
+	spb.Balances = make([]uint64, numValidators)
+	slot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
+	require.NoError(t, err)
+	spb.Slot = slot
+
+	privKeys := make([]common.SecretKey, numValidators)
+	maxEffectiveBalance := params.BeaconConfig().MaxEffectiveBalance
+	executionAddress := []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13}
+
 	for i := range validators {
 		v := &ethpb.Validator{}
 		v.EffectiveBalance = maxEffectiveBalance
@@ -832,15 +912,19 @@ func TestBLSChangesSignatureBatchFromBellatrix(t *testing.T) {
 	spc := &ethpb.BeaconStateCapella{
 		Fork: &ethpb.Fork{
 			CurrentVersion:  params.BeaconConfig().CapellaForkVersion,
-			PreviousVersion: params.BeaconConfig().BellatrixForkVersion,
+			PreviousVersion: params.BeaconConfig().GenesisForkVersion,
 			Epoch:           params.BeaconConfig().CapellaForkEpoch,
 		},
 	}
+	slot, err = slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	require.NoError(t, err)
+	spc.Slot = slot
+
 	stc, err := state_native.InitializeFromProtoCapella(spc)
 	require.NoError(t, err)
 
 	for i, message := range blsChanges {
-		signature, err := signing.ComputeDomainAndSign(stc, time.CurrentEpoch(stc), message, params.BeaconConfig().DomainBLSToExecutionChange, privKeys[i])
+		signature, err := signing.ComputeDomainAndSign(stc, 0, message, params.BeaconConfig().DomainBLSToExecutionChange, privKeys[i])
 		require.NoError(t, err)
 
 		signed := &ethpb.SignedBLSToExecutionChange{
@@ -854,4 +938,9 @@ func TestBLSChangesSignatureBatchFromBellatrix(t *testing.T) {
 	verify, err := batch.Verify()
 	require.NoError(t, err)
 	require.Equal(t, true, verify)
+
+	// Verify a single change
+	change := migration.V1Alpha1SignedBLSToExecChangeToV2(signedChanges[0])
+	require.NoError(t, blocks.VerifyBLSChangeSignature(st, change))
+	params.OverrideBeaconConfig(savedConfig)
 }

beacon-chain/core/capella/upgrade.go

@@ -42,6 +42,10 @@ func UpgradeToCapella(state state.BeaconState) (state.BeaconState, error) {
 		return nil, err
 	}
 
+	hrs, err := state.HistoricalRoots()
+	if err != nil {
+		return nil, err
+	}
 	s := &ethpb.BeaconStateCapella{
 		GenesisTime:           state.GenesisTime(),
 		GenesisValidatorsRoot: state.GenesisValidatorsRoot(),
@@ -54,7 +58,7 @@ func UpgradeToCapella(state state.BeaconState) (state.BeaconState, error) {
 		LatestBlockHeader:           state.LatestBlockHeader(),
 		BlockRoots:                  state.BlockRoots(),
 		StateRoots:                  state.StateRoots(),
-		HistoricalRoots:             state.HistoricalRoots(),
+		HistoricalRoots:             hrs,
 		Eth1Data:                    state.Eth1Data(),
 		Eth1DataVotes:               state.Eth1DataVotes(),
 		Eth1DepositIndex:            state.Eth1DepositIndex(),
@@ -90,6 +94,7 @@ func UpgradeToCapella(state state.BeaconState) (state.BeaconState, error) {
 		},
 		NextWithdrawalIndex:          0,
 		NextWithdrawalValidatorIndex: 0,
+		HistoricalSummaries:          make([]*ethpb.HistoricalSummary, 0),
 	}
 
 	return state_native.InitializeFromProtoUnsafeCapella(s)

beacon-chain/core/capella/upgrade_test.go

@@ -25,7 +25,6 @@ func TestUpgradeToCapella(t *testing.T) {
 	require.DeepSSZEqual(t, preForkState.LatestBlockHeader(), mSt.LatestBlockHeader())
 	require.DeepSSZEqual(t, preForkState.BlockRoots(), mSt.BlockRoots())
 	require.DeepSSZEqual(t, preForkState.StateRoots(), mSt.StateRoots())
-	require.DeepSSZEqual(t, preForkState.HistoricalRoots(), mSt.HistoricalRoots())
 	require.DeepSSZEqual(t, preForkState.Eth1Data(), mSt.Eth1Data())
 	require.DeepSSZEqual(t, preForkState.Eth1DataVotes(), mSt.Eth1DataVotes())
 	require.DeepSSZEqual(t, preForkState.Eth1DepositIndex(), mSt.Eth1DepositIndex())
@@ -98,4 +97,8 @@ func TestUpgradeToCapella(t *testing.T) {
 	lwvi, err := mSt.NextWithdrawalValidatorIndex()
 	require.NoError(t, err)
 	require.Equal(t, types.ValidatorIndex(0), lwvi)
+
+	summaries, err := mSt.HistoricalSummaries()
+	require.NoError(t, err)
+	require.Equal(t, 0, len(summaries))
 }

beacon-chain/core/epoch/BUILD.bazel

@@ -13,11 +13,14 @@ go_library(
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/validators:go_default_library",
         "//beacon-chain/state:go_default_library",
+        "//beacon-chain/state/stateutil:go_default_library",
+        "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//math:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation:go_default_library",
+        "//runtime/version:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
     ],
 )
@@ -33,8 +36,10 @@ go_test(
     deps = [
         "//beacon-chain/core/helpers:go_default_library",
         "//beacon-chain/core/time:go_default_library",
+        "//beacon-chain/core/transition:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
+        "//beacon-chain/state/stateutil:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",

beacon-chain/core/epoch/epoch_processing.go

@@ -14,11 +14,14 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/validators"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stateutil"
+	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/math"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1/attestation"
+	"github.com/prysmaticlabs/prysm/v3/runtime/version"
 )
 
 // sortableIndices implements the Sort interface to sort newly activated validator indices
@@ -349,33 +352,39 @@ func ProcessRandaoMixesReset(state state.BeaconState) (state.BeaconState, error)
 	return state, nil
 }
 
-// ProcessHistoricalRootsUpdate processes the updates to historical root accumulator during epoch processing.
-//
-// Spec pseudocode definition:
-//
-//	def process_historical_roots_update(state: BeaconState) -> None:
-//	  # Set historical root accumulator
-//	  next_epoch = Epoch(get_current_epoch(state) + 1)
-//	  if next_epoch % (SLOTS_PER_HISTORICAL_ROOT // SLOTS_PER_EPOCH) == 0:
-//	      historical_batch = HistoricalBatch(block_roots=state.block_roots, state_roots=state.state_roots)
-//	      state.historical_roots.append(hash_tree_root(historical_batch))
-func ProcessHistoricalRootsUpdate(state state.BeaconState) (state.BeaconState, error) {
+// ProcessHistoricalDataUpdate processes the updates to historical data during epoch processing.
+// From Capella onward, per spec,state's historical summaries are updated instead of historical roots.
+func ProcessHistoricalDataUpdate(state state.BeaconState) (state.BeaconState, error) {
 	currentEpoch := time.CurrentEpoch(state)
 	nextEpoch := currentEpoch + 1
 
 	// Set historical root accumulator.
 	epochsPerHistoricalRoot := params.BeaconConfig().SlotsPerHistoricalRoot.DivSlot(params.BeaconConfig().SlotsPerEpoch)
 	if nextEpoch.Mod(uint64(epochsPerHistoricalRoot)) == 0 {
-		historicalBatch := &ethpb.HistoricalBatch{
-			BlockRoots: state.BlockRoots(),
-			StateRoots: state.StateRoots(),
-		}
-		batchRoot, err := historicalBatch.HashTreeRoot()
-		if err != nil {
-			return nil, errors.Wrap(err, "could not hash historical batch")
-		}
-		if err := state.AppendHistoricalRoots(batchRoot); err != nil {
-			return nil, err
+		if state.Version() >= version.Capella {
+			br, err := stateutil.ArraysRoot(state.BlockRoots(), fieldparams.BlockRootsLength)
+			if err != nil {
+				return nil, err
+			}
+			sr, err := stateutil.ArraysRoot(state.StateRoots(), fieldparams.StateRootsLength)
+			if err != nil {
+				return nil, err
+			}
+			if err := state.AppendHistoricalSummaries(&ethpb.HistoricalSummary{BlockSummaryRoot: br[:], StateSummaryRoot: sr[:]}); err != nil {
+				return nil, err
+			}
+		} else {
+			historicalBatch := &ethpb.HistoricalBatch{
+				BlockRoots: state.BlockRoots(),
+				StateRoots: state.StateRoots(),
+			}
+			batchRoot, err := historicalBatch.HashTreeRoot()
+			if err != nil {
+				return nil, errors.Wrap(err, "could not hash historical batch")
+			}
+			if err := state.AppendHistoricalRoots(batchRoot); err != nil {
+				return nil, err
+			}
 		}
 	}
 
@@ -426,7 +435,7 @@ func ProcessFinalUpdates(state state.BeaconState) (state.BeaconState, error) {
 	}
 
 	// Set historical root accumulator.
-	state, err = ProcessHistoricalRootsUpdate(state)
+	state, err = ProcessHistoricalDataUpdate(state)
 	if err != nil {
 		return nil, err
 	}

beacon-chain/core/epoch/epoch_processing_test.go

@@ -10,8 +10,10 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/epoch"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
 	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stateutil"
 	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
@@ -274,7 +276,9 @@ func TestProcessFinalUpdates_CanProcess(t *testing.T) {
 	assert.DeepNotEqual(t, params.BeaconConfig().ZeroHash[:], mix, "latest RANDAO still zero hashes")
 
 	// Verify historical root accumulator was appended.
-	assert.Equal(t, 1, len(newS.HistoricalRoots()), "Unexpected slashed balance")
+	roots, err := newS.HistoricalRoots()
+	require.NoError(t, err)
+	assert.Equal(t, 1, len(roots), "Unexpected slashed balance")
 	currAtt, err := newS.CurrentEpochAttestations()
 	require.NoError(t, err)
 	assert.NotNil(t, currAtt, "Nil value stored in current epoch attestations instead of empty slice")
@@ -455,3 +459,83 @@ func TestProcessSlashings_BadValue(t *testing.T) {
 	_, err = epoch.ProcessSlashings(s, params.BeaconConfig().ProportionalSlashingMultiplier)
 	require.ErrorContains(t, "addition overflows", err)
 }
+
+func TestProcessHistoricalDataUpdate(t *testing.T) {
+	tests := []struct {
+		name     string
+		st       func() state.BeaconState
+		verifier func(state.BeaconState)
+	}{
+		{
+			name: "no change",
+			st: func() state.BeaconState {
+				st, _ := util.DeterministicGenesisState(t, 1)
+				return st
+			},
+			verifier: func(st state.BeaconState) {
+				roots, err := st.HistoricalRoots()
+				require.NoError(t, err)
+				require.Equal(t, 0, len(roots))
+			},
+		},
+		{
+			name: "before capella can process and get historical root",
+			st: func() state.BeaconState {
+				st, _ := util.DeterministicGenesisState(t, 1)
+				st, err := transition.ProcessSlots(context.Background(), st, params.BeaconConfig().SlotsPerHistoricalRoot-1)
+				require.NoError(t, err)
+				return st
+			},
+			verifier: func(st state.BeaconState) {
+				roots, err := st.HistoricalRoots()
+				require.NoError(t, err)
+				require.Equal(t, 1, len(roots))
+
+				b := &ethpb.HistoricalBatch{
+					BlockRoots: st.BlockRoots(),
+					StateRoots: st.StateRoots(),
+				}
+				r, err := b.HashTreeRoot()
+				require.NoError(t, err)
+				require.DeepEqual(t, r[:], roots[0])
+
+				_, err = st.HistoricalSummaries()
+				require.ErrorContains(t, "HistoricalSummaries is not supported for phase0", err)
+			},
+		},
+		{
+			name: "after capella can process and get historical summary",
+			st: func() state.BeaconState {
+				st, _ := util.DeterministicGenesisStateCapella(t, 1)
+				st, err := transition.ProcessSlots(context.Background(), st, params.BeaconConfig().SlotsPerHistoricalRoot-1)
+				require.NoError(t, err)
+				return st
+			},
+			verifier: func(st state.BeaconState) {
+				summaries, err := st.HistoricalSummaries()
+				require.NoError(t, err)
+				require.Equal(t, 1, len(summaries))
+
+				br, err := stateutil.ArraysRoot(st.BlockRoots(), fieldparams.BlockRootsLength)
+				require.NoError(t, err)
+				sr, err := stateutil.ArraysRoot(st.StateRoots(), fieldparams.StateRootsLength)
+				require.NoError(t, err)
+				b := &ethpb.HistoricalSummary{
+					BlockSummaryRoot: br[:],
+					StateSummaryRoot: sr[:],
+				}
+				require.DeepEqual(t, b, summaries[0])
+				hrs, err := st.HistoricalRoots()
+				require.NoError(t, err)
+				require.DeepEqual(t, hrs, [][]byte{})
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := epoch.ProcessHistoricalDataUpdate(tt.st())
+			require.NoError(t, err)
+			tt.verifier(got)
+		})
+	}
+}

beacon-chain/core/execution/upgrade.go

@@ -35,6 +35,10 @@ func UpgradeToBellatrix(state state.BeaconState) (state.BeaconState, error) {
 		return nil, err
 	}
 
+	hrs, err := state.HistoricalRoots()
+	if err != nil {
+		return nil, err
+	}
 	s := &ethpb.BeaconStateBellatrix{
 		GenesisTime:           state.GenesisTime(),
 		GenesisValidatorsRoot: state.GenesisValidatorsRoot(),
@@ -47,7 +51,7 @@ func UpgradeToBellatrix(state state.BeaconState) (state.BeaconState, error) {
 		LatestBlockHeader:           state.LatestBlockHeader(),
 		BlockRoots:                  state.BlockRoots(),
 		StateRoots:                  state.StateRoots(),
-		HistoricalRoots:             state.HistoricalRoots(),
+		HistoricalRoots:             hrs,
 		Eth1Data:                    state.Eth1Data(),
 		Eth1DataVotes:               state.Eth1DataVotes(),
 		Eth1DepositIndex:            state.Eth1DepositIndex(),

beacon-chain/core/execution/upgrade_test.go

@@ -24,7 +24,11 @@ func TestUpgradeToBellatrix(t *testing.T) {
 	require.DeepSSZEqual(t, preForkState.LatestBlockHeader(), mSt.LatestBlockHeader())
 	require.DeepSSZEqual(t, preForkState.BlockRoots(), mSt.BlockRoots())
 	require.DeepSSZEqual(t, preForkState.StateRoots(), mSt.StateRoots())
-	require.DeepSSZEqual(t, preForkState.HistoricalRoots(), mSt.HistoricalRoots())
+	r1, err := preForkState.HistoricalRoots()
+	require.NoError(t, err)
+	r2, err := mSt.HistoricalRoots()
+	require.NoError(t, err)
+	require.DeepSSZEqual(t, r1, r2)
 	require.DeepSSZEqual(t, preForkState.Eth1Data(), mSt.Eth1Data())
 	require.DeepSSZEqual(t, preForkState.Eth1DataVotes(), mSt.Eth1DataVotes())
 	require.DeepSSZEqual(t, preForkState.Eth1DepositIndex(), mSt.Eth1DepositIndex())

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

@@ -19,6 +19,9 @@ const (
 
 	// SyncCommitteeContributionReceived is sent after a sync committee contribution object has been received.
 	SyncCommitteeContributionReceived
+
+	// BLSToExecutionChangeReceived is sent after a BLS to execution change object has been received from gossip or rpc.
+	BLSToExecutionChangeReceived
 )
 
 // UnAggregatedAttReceivedData is the data sent with UnaggregatedAttReceived events.
@@ -44,3 +47,8 @@ type SyncCommitteeContributionReceivedData struct {
 	// Contribution is the sync committee contribution object.
 	Contribution *ethpb.SignedContributionAndProof
 }
+
+// BLSToExecutionChangeReceivedData is the data sent with BLSToExecutionChangeReceived events.
+type BLSToExecutionChangeReceivedData struct {
+	Change *ethpb.SignedBLSToExecutionChange
+}

beacon-chain/core/transition/transition.go

@@ -258,20 +258,19 @@ func ProcessSlots(ctx context.Context, state state.BeaconState, slot types.Slot)
 			return nil, errors.Wrap(err, "could not process slot")
 		}
 		if time.CanProcessEpoch(state) {
-			switch state.Version() {
-			case version.Phase0:
+			if state.Version() == version.Phase0 {
 				state, err = ProcessEpochPrecompute(ctx, state)
 				if err != nil {
 					tracing.AnnotateError(span, err)
 					return nil, errors.Wrap(err, "could not process epoch with optimizations")
 				}
-			case version.Altair, version.Bellatrix, version.Capella:
+			} else if state.Version() >= version.Altair {
 				state, err = altair.ProcessEpoch(ctx, state)
 				if err != nil {
 					tracing.AnnotateError(span, err)
 					return nil, errors.Wrap(err, "could not process epoch")
 				}
-			default:
+			} else {
 				return nil, errors.New("beacon state should have a version")
 			}
 		}

beacon-chain/core/transition/transition_no_verify_sig.go

@@ -53,7 +53,7 @@ func ExecuteStateTransitionNoVerifyAnySig(
 		return nil, nil, errors.New("nil block")
 	}
 
-	ctx, span := trace.StartSpan(ctx, "core.state.ExecuteStateTransitionNoVerifyAttSigs")
+	ctx, span := trace.StartSpan(ctx, "core.state.ExecuteStateTransitionNoVerifyAnySig")
 	defer span.End()
 	var err error
 

beacon-chain/db/kv/genesis_test.go

@@ -2,12 +2,14 @@ package kv
 
 import (
 	"context"
+	"encoding/hex"
 	"os"
 	"testing"
 
 	"github.com/bazelbuild/rules_go/go/tools/bazel"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/iface"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
+	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v3/testing/assert"
 	"github.com/prysmaticlabs/prysm/v3/testing/require"
 	"github.com/prysmaticlabs/prysm/v3/testing/util"
@@ -48,6 +50,37 @@ func testGenesisDataSaved(t *testing.T, db iface.Database) {
 	require.Equal(t, gbHTR, headHTR, "head block does not match genesis block")
 }
 
+func TestLoadCapellaFromFile(t *testing.T) {
+	cfg, err := params.ByName(params.MainnetName)
+	require.NoError(t, err)
+	// This state fixture is from a hive testnet, `0a` is the suffix they are using in their fork versions.
+	suffix, err := hex.DecodeString("0a")
+	require.NoError(t, err)
+	require.Equal(t, 1, len(suffix))
+	reversioned := cfg.Copy()
+	params.FillTestVersions(reversioned, suffix[0])
+	reversioned.CapellaForkEpoch = 0
+	require.Equal(t, [4]byte{3, 0, 0, 10}, bytesutil.ToBytes4(reversioned.CapellaForkVersion))
+	reversioned.ConfigName = "capella-genesis-test"
+	undo, err := params.SetActiveWithUndo(reversioned)
+	require.NoError(t, err)
+	defer func() {
+		require.NoError(t, undo())
+	}()
+
+	fp := "testdata/capella_genesis.ssz"
+	rfp, err := bazel.Runfile(fp)
+	if err == nil {
+		fp = rfp
+	}
+	sb, err := os.ReadFile(fp)
+	require.NoError(t, err)
+
+	db := setupDB(t)
+	require.NoError(t, db.LoadGenesis(context.Background(), sb))
+	testGenesisDataSaved(t, db)
+}
+
 func TestLoadGenesisFromFile(t *testing.T) {
 	// for this test to work, we need the active config to have these properties:
 	// - fork version schedule that matches mainnnet.genesis.ssz
@@ -57,7 +90,7 @@ func TestLoadGenesisFromFile(t *testing.T) {
 	// uses the mainnet fork schedule. construct the differently named mainnet config and set it active.
 	// finally, revert all this at the end of the test.
 
-	// first get the real mainnet out of the way by overwriting it schedule.
+	// first get the real mainnet out of the way by overwriting its schedule.
 	cfg, err := params.ByName(params.MainnetName)
 	require.NoError(t, err)
 	cfg = cfg.Copy()

beacon-chain/execution/engine_client.go

@@ -86,6 +86,8 @@ type EngineCaller interface {
 	GetTerminalBlockHash(ctx context.Context, transitionTime uint64) ([]byte, bool, error)
 }
 
+var EmptyBlockHash = errors.New("Block hash is empty 0x0000...")
+
 // NewPayload calls the engine_newPayloadVX method via JSON-RPC.
 func (s *Service) NewPayload(ctx context.Context, payload interfaces.ExecutionData) ([]byte, error) {
 	ctx, span := trace.StartSpan(ctx, "powchain.engine-api-client.NewPayload")
@@ -471,6 +473,10 @@ func (s *Service) ReconstructFullBlock(
 	if executionBlock == nil {
 		return nil, fmt.Errorf("received nil execution block for request by hash %#x", executionBlockHash)
 	}
+	if bytes.Equal(executionBlock.Hash.Bytes(), []byte{}) {
+		return nil, EmptyBlockHash
+	}
+
 	executionBlock.Version = blindedBlock.Version()
 	payload, err := fullPayloadFromExecutionBlock(header, executionBlock)
 	if err != nil {

beacon-chain/execution/engine_client_test.go

@@ -54,6 +54,7 @@ func (RPCClientBad) CallContext(context.Context, interface{}, string, ...interfa
 }
 
 func TestClient_IPC(t *testing.T) {
+	t.Skip("Skipping IPC test to support Capella devnet-3")
 	server := newTestIPCServer(t)
 	defer server.Stop()
 	rpcClient := rpc.DialInProc(server)
@@ -154,6 +155,8 @@ func TestClient_IPC(t *testing.T) {
 }
 
 func TestClient_HTTP(t *testing.T) {
+	t.Skip("Skipping HTTP test to support Capella devnet-3")
+
 	ctx := context.Background()
 	fix := fixtures()
 

beacon-chain/execution/testing/BUILD.bazel

@@ -26,6 +26,7 @@ go_library(
         "//encoding/bytesutil:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//time/slots:go_default_library",
         "@com_github_ethereum_go_ethereum//accounts/abi/bind/backends:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",

beacon-chain/execution/testing/mock_engine_client.go

@@ -15,6 +15,7 @@ import (
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
 	pb "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
+	"github.com/prysmaticlabs/prysm/v3/time/slots"
 )
 
 // EngineClient --
@@ -23,6 +24,7 @@ type EngineClient struct {
 	PayloadIDBytes              *pb.PayloadIDBytes
 	ForkChoiceUpdatedResp       []byte
 	ExecutionPayload            *pb.ExecutionPayload
+	ExecutionPayloadCapella     *pb.ExecutionPayloadCapella
 	ExecutionBlock              *pb.ExecutionBlock
 	Err                         error
 	ErrLatestExecBlock          error
@@ -54,7 +56,10 @@ func (e *EngineClient) ForkchoiceUpdated(
 }
 
 // GetPayload --
-func (e *EngineClient) GetPayload(_ context.Context, _ [8]byte, _ types.Slot) (interfaces.ExecutionData, error) {
+func (e *EngineClient) GetPayload(_ context.Context, _ [8]byte, s types.Slot) (interfaces.ExecutionData, error) {
+	if slots.ToEpoch(s) >= params.BeaconConfig().CapellaForkEpoch {
+		return blocks.WrappedExecutionPayloadCapella(e.ExecutionPayloadCapella)
+	}
 	p, err := blocks.WrappedExecutionPayload(e.ExecutionPayload)
 	if err != nil {
 		return nil, err

beacon-chain/forkchoice/doubly-linked-tree/forkchoice.go

@@ -669,3 +669,14 @@ func (f *ForkChoice) ForkChoiceDump(ctx context.Context) (*v1.ForkChoiceDump, er
 func (f *ForkChoice) SetBalancesByRooter(handler forkchoice.BalancesByRooter) {
 	f.balancesByRoot = handler
 }
+
+// Weight returns the weight of the given root if found on the store
+func (f *ForkChoice) Weight(root [32]byte) (uint64, error) {
+	f.store.nodesLock.RLock()
+	defer f.store.nodesLock.RUnlock()
+	n, ok := f.store.nodeByRoot[root]
+	if !ok || n == nil {
+		return 0, ErrNilNode
+	}
+	return n.weight, nil
+}

beacon-chain/forkchoice/doubly-linked-tree/forkchoice_test.go

@@ -757,3 +757,24 @@ func TestForkChoice_UpdateCheckpoints(t *testing.T) {
 		})
 	}
 }
+
+func TestWeight(t *testing.T) {
+	ctx := context.Background()
+	f := setup(0, 0)
+
+	root := [32]byte{'a'}
+	st, blkRoot, err := prepareForkchoiceState(ctx, 0, root, params.BeaconConfig().ZeroHash, [32]byte{'A'}, 1, 1)
+	require.NoError(t, err)
+	require.NoError(t, f.InsertNode(ctx, st, blkRoot))
+
+	n, ok := f.store.nodeByRoot[root]
+	require.Equal(t, true, ok)
+	n.weight = 10
+	w, err := f.Weight(root)
+	require.NoError(t, err)
+	require.Equal(t, uint64(10), w)
+
+	w, err = f.Weight([32]byte{'b'})
+	require.ErrorIs(t, err, ErrNilNode)
+	require.Equal(t, uint64(0), w)
+}

beacon-chain/forkchoice/doubly-linked-tree/vote_test.go

@@ -120,16 +120,16 @@ func TestVotes_CanFindHead(t *testing.T) {
 	//             |
 	//             3
 	//             |
-	//             4 <- head
+	//             4
 	//            /
-	//           5 <- justified epoch = 2
+	//           5 <- head, justified epoch = 2
 	state, blkRoot, err = prepareForkchoiceState(context.Background(), 0, indexToHash(5), indexToHash(4), params.BeaconConfig().ZeroHash, 2, 2)
 	require.NoError(t, err)
 	require.NoError(t, f.InsertNode(ctx, state, blkRoot))
 
 	r, err = f.Head(context.Background(), balances)
 	require.NoError(t, err)
-	assert.Equal(t, indexToHash(5), r, "Incorrect head for with justified epoch at 1")
+	assert.Equal(t, indexToHash(5), r, "Incorrect head for with justified epoch at 2")
 
 	// Insert block 6 with justified epoch 3: verify it's head
 	//            0
@@ -138,15 +138,15 @@ func TestVotes_CanFindHead(t *testing.T) {
 	//             |
 	//             3
 	//             |
-	//             4 <- head
+	//             4
 	//            / \
-	//           5  6 <- justified epoch = 3
+	//           5  6 <- head, justified epoch = 3
 	state, blkRoot, err = prepareForkchoiceState(context.Background(), 0, indexToHash(6), indexToHash(4), params.BeaconConfig().ZeroHash, 3, 2)
 	require.NoError(t, err)
 	require.NoError(t, f.InsertNode(ctx, state, blkRoot))
 	r, err = f.Head(context.Background(), balances)
 	require.NoError(t, err)
-	assert.Equal(t, indexToHash(6), r, "Incorrect head for with justified epoch at 1")
+	assert.Equal(t, indexToHash(6), r, "Incorrect head for with justified epoch at 3")
 
 	// Moved 2 votes to block 5:
 	f.ProcessAttestation(context.Background(), []uint64{0, 1}, indexToHash(5), 4)
@@ -174,10 +174,10 @@ func TestVotes_CanFindHead(t *testing.T) {
 	require.NoError(t, f.InsertNode(ctx, state, blkRoot))
 	r, err = f.Head(context.Background(), balances)
 	require.NoError(t, err)
-	assert.Equal(t, indexToHash(6), r, "Incorrect head for with justified epoch at 1")
+	assert.Equal(t, indexToHash(6), r, "Incorrect head for with justified epoch at 3")
 
-	// Insert block 9 with justified epoch 3, it becomes head
-	// Verify 9 is the head:
+	// Insert block 10 with justified epoch 3, it becomes head
+	// Verify 10 is the head:
 	//            0
 	//           / \
 	//          2  1
@@ -289,7 +289,7 @@ func TestVotes_CanFindHead(t *testing.T) {
 
 	r, err = f.Head(context.Background(), balances)
 	require.NoError(t, err)
-	assert.Equal(t, indexToHash(10), r, "Incorrect head for with justified epoch at 2")
+	assert.Equal(t, indexToHash(10), r, "Incorrect head for with justified epoch at 3")
 
 	// Insert new block 11 and verify head is at 11.
 	//          5   6

beacon-chain/forkchoice/interfaces.go

@@ -69,6 +69,7 @@ type Getter interface {
 	HighestReceivedBlockRoot() [32]byte
 	ReceivedBlocksLastEpoch() (uint64, error)
 	ForkChoiceDump(context.Context) (*v1.ForkChoiceDump, error)
+	Weight(root [32]byte) (uint64, error)
 	VotedFraction(root [32]byte) (uint64, error)
 }
 

beacon-chain/node/node.go

@@ -448,6 +448,11 @@ func (b *BeaconNode) startSlasherDB(cliCtx *cli.Context) error {
 		return nil
 	}
 	baseDir := cliCtx.String(cmd.DataDirFlag.Name)
+
+	if cliCtx.IsSet(flags.SlasherDirFlag.Name) {
+		baseDir = cliCtx.String(flags.SlasherDirFlag.Name)
+	}
+
 	dbPath := filepath.Join(baseDir, kv.BeaconNodeDbDirName)
 	clearDB := cliCtx.Bool(cmd.ClearDB.Name)
 	forceClearDB := cliCtx.Bool(cmd.ForceClearDB.Name)

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

@@ -52,8 +52,8 @@ func (c *AttCaches) SaveUnaggregatedAttestations(atts []*ethpb.Attestation) erro
 
 // UnaggregatedAttestations returns all the unaggregated attestations in cache.
 func (c *AttCaches) UnaggregatedAttestations() ([]*ethpb.Attestation, error) {
-	c.unAggregateAttLock.Lock()
-	defer c.unAggregateAttLock.Unlock()
+	c.unAggregateAttLock.RLock()
+	defer c.unAggregateAttLock.RUnlock()
 	unAggregatedAtts := c.unAggregatedAtt
 	atts := make([]*ethpb.Attestation, 0, len(unAggregatedAtts))
 	for _, att := range unAggregatedAtts {

beacon-chain/operations/attestations/prune_expired.go

@@ -59,8 +59,8 @@ func (s *Service) pruneExpiredAtts() {
 			if err := s.cfg.Pool.DeleteBlockAttestation(att); err != nil {
 				log.WithError(err).Error("Could not delete expired block attestation")
 			}
+			expiredBlockAtts.Inc()
 		}
-		expiredBlockAtts.Inc()
 	}
 }
 

beacon-chain/operations/blstoexec/BUILD.bazel

@@ -16,7 +16,6 @@ go_library(
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//container/doubly-linked-list:go_default_library",
-        "//crypto/bls/blst:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",

beacon-chain/operations/blstoexec/pool.go

@@ -10,7 +10,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	doublylinkedlist "github.com/prysmaticlabs/prysm/v3/container/doubly-linked-list"
-	"github.com/prysmaticlabs/prysm/v3/crypto/bls/blst"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	"github.com/sirupsen/logrus"
 )
@@ -67,26 +66,21 @@ func (p *Pool) BLSToExecChangesForInclusion(st state.BeaconState) ([]*ethpb.Sign
 	p.lock.RLock()
 	length := int(math.Min(float64(params.BeaconConfig().MaxBlsToExecutionChanges), float64(p.pending.Len())))
 	result := make([]*ethpb.SignedBLSToExecutionChange, 0, length)
-	node := p.pending.First()
+	node := p.pending.Last()
 	for node != nil && len(result) < length {
 		change, err := node.Value()
 		if err != nil {
 			p.lock.RUnlock()
 			return nil, err
 		}
-		_, err = blocks.ValidateBLSToExecutionChange(st, change)
-		if err != nil {
-			logrus.WithError(err).Warning("removing invalid BLSToExecutionChange from pool")
-			// MarkIncluded removes the invalid change from the pool
-			p.lock.RUnlock()
-			if err := p.MarkIncluded(change); err != nil {
-				return nil, errors.Wrap(err, "could not mark BLSToExecutionChange as included")
-			}
-			p.lock.RLock()
-		} else {
-			result = append(result, change)
+		copied := ethpb.CopyBLSToExecutionChanges([]*ethpb.SignedBLSToExecutionChange{change})
+		result = append(result, copied[0])
+		p.lock.RUnlock()
+		if err := p.MarkIncluded(change); err != nil {
+			return nil, errors.Wrap(err, "could not mark included")
 		}
-		node, err = node.Next()
+		p.lock.RLock()
+		node, err = node.Prev()
 		if err != nil {
 			p.lock.RUnlock()
 			return nil, err
@@ -97,35 +91,11 @@ func (p *Pool) BLSToExecChangesForInclusion(st state.BeaconState) ([]*ethpb.Sign
 		return result, nil
 	}
 	// We now verify the signatures in batches
-	cSet, err := blocks.BLSChangesSignatureBatch(st, result)
+	_, err := blocks.BLSChangesSignatureBatch(st, result)
 	if err != nil {
 		logrus.WithError(err).Warning("could not get BLSToExecutionChanges signatures")
-	} else {
-		ok, err := cSet.Verify()
-		if err != nil {
-			logrus.WithError(err).Warning("could not batch verify BLSToExecutionChanges signatures")
-		} else if ok {
-			return result, nil
-		}
 	}
-	// Batch signature failed, check signatures individually
-	verified := make([]*ethpb.SignedBLSToExecutionChange, 0, length)
-	for i, sig := range cSet.Signatures {
-		signature, err := blst.SignatureFromBytes(sig)
-		if err != nil {
-			logrus.WithError(err).Warning("could not get signature from bytes")
-			continue
-		}
-		if !signature.Verify(cSet.PublicKeys[i], cSet.Messages[i][:]) {
-			logrus.Warning("removing BLSToExecutionChange with invalid signature from pool")
-			if err := p.MarkIncluded(result[i]); err != nil {
-				return nil, errors.Wrap(err, "could not mark BLSToExecutionChange as included")
-			}
-		} else {
-			verified = append(verified, result[i])
-		}
-	}
-	return verified, nil
+	return result, nil
 }
 
 // InsertBLSToExecChange inserts an object into the pool.

beacon-chain/operations/blstoexec/pool_test.go

@@ -130,7 +130,7 @@ func TestBLSToExecChangesForInclusion(t *testing.T) {
 		// We want FIFO semantics, which means validator with index 16 shouldn't be returned
 		assert.Equal(t, int(params.BeaconConfig().MaxBlsToExecutionChanges), len(changes))
 		for _, ch := range changes {
-			assert.NotEqual(t, types.ValidatorIndex(16), ch.Message.ValidatorIndex)
+			assert.NotEqual(t, types.ValidatorIndex(15), ch.Message.ValidatorIndex)
 		}
 	})
 	t.Run("One Bad change", func(t *testing.T) {
@@ -143,19 +143,19 @@ func TestBLSToExecChangesForInclusion(t *testing.T) {
 		changes, err := pool.BLSToExecChangesForInclusion(st)
 		require.NoError(t, err)
 		assert.Equal(t, int(params.BeaconConfig().MaxBlsToExecutionChanges), len(changes))
-		assert.Equal(t, types.ValidatorIndex(2), changes[1].Message.ValidatorIndex)
+		assert.Equal(t, types.ValidatorIndex(30), changes[1].Message.ValidatorIndex)
 		signedChanges[1].Message.FromBlsPubkey[5] = saveByte
 	})
 	t.Run("One Bad Signature", func(t *testing.T) {
 		pool := NewPool()
-		copy(signedChanges[1].Signature, signedChanges[2].Signature)
+		copy(signedChanges[30].Signature, signedChanges[31].Signature)
 		for i := uint64(0); i < numValidators; i++ {
 			pool.InsertBLSToExecChange(signedChanges[i])
 		}
 		changes, err := pool.BLSToExecChangesForInclusion(st)
 		require.NoError(t, err)
 		assert.Equal(t, int(params.BeaconConfig().MaxBlsToExecutionChanges)-1, len(changes))
-		assert.Equal(t, types.ValidatorIndex(2), changes[1].Message.ValidatorIndex)
+		assert.Equal(t, types.ValidatorIndex(29), changes[1].Message.ValidatorIndex)
 	})
 }
 

beacon-chain/rpc/apimiddleware/custom_handlers.go

@@ -416,6 +416,8 @@ func receiveEvents(eventChan <-chan *sse.Event, w http.ResponseWriter, req *http
 				data = &EventChainReorgJson{}
 			case events.SyncCommitteeContributionTopic:
 				data = &SignedContributionAndProofJson{}
+			case events.BLSToExecutionChangeTopic:
+				data = &SignedBLSToExecutionChangeJson{}
 			case "error":
 				data = &EventErrorJson{}
 			default:

beacon-chain/rpc/apimiddleware/custom_hooks.go

@@ -17,6 +17,29 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/time/slots"
 )
 
+// https://ethereum.github.io/beacon-APIs/?urls.primaryName=dev#/Beacon/submitPoolBLSToExecutionChange
+// expects posting a top-level array. We make it more proto-friendly by wrapping it in a struct.
+func wrapBLSChangesArray(
+	endpoint *apimiddleware.Endpoint,
+	_ http.ResponseWriter,
+	req *http.Request,
+) (apimiddleware.RunDefault, apimiddleware.ErrorJson) {
+	if _, ok := endpoint.PostRequest.(*SubmitBLSToExecutionChangesRequest); !ok {
+		return true, nil
+	}
+	changes := make([]*SignedBLSToExecutionChangeJson, 0)
+	if err := json.NewDecoder(req.Body).Decode(&changes); err != nil {
+		return false, apimiddleware.InternalServerErrorWithMessage(err, "could not decode body")
+	}
+	j := &SubmitBLSToExecutionChangesRequest{Changes: changes}
+	b, err := json.Marshal(j)
+	if err != nil {
+		return false, apimiddleware.InternalServerErrorWithMessage(err, "could not marshal wrapped body")
+	}
+	req.Body = io.NopCloser(bytes.NewReader(b))
+	return true, nil
+}
+
 // https://ethereum.github.io/beacon-apis/#/Validator/prepareBeaconProposer expects posting a top-level array.
 // We make it more proto-friendly by wrapping it in a struct.
 func wrapFeeRecipientsArray(
@@ -278,8 +301,10 @@ func setInitialPublishBlockPostRequest(endpoint *apimiddleware.Endpoint,
 		endpoint.PostRequest = &SignedBeaconBlockContainerJson{}
 	} else if currentEpoch < params.BeaconConfig().BellatrixForkEpoch {
 		endpoint.PostRequest = &SignedBeaconBlockAltairContainerJson{}
-	} else {
+	} else if currentEpoch < params.BeaconConfig().CapellaForkEpoch {
 		endpoint.PostRequest = &SignedBeaconBlockBellatrixContainerJson{}
+	} else {
+		endpoint.PostRequest = &SignedBeaconBlockCapellaContainerJson{}
 	}
 	req.Body = io.NopCloser(bytes.NewBuffer(buf))
 	return true, nil
@@ -684,11 +709,21 @@ type bellatrixProduceBlockResponseJson struct {
 	Data    *BeaconBlockBellatrixJson `json:"data"`
 }
 
+type capellaProduceBlockResponseJson struct {
+	Version string                  `json:"version" enum:"true"`
+	Data    *BeaconBlockCapellaJson `json:"data"`
+}
+
 type bellatrixProduceBlindedBlockResponseJson struct {
 	Version string                           `json:"version" enum:"true"`
 	Data    *BlindedBeaconBlockBellatrixJson `json:"data"`
 }
 
+type capellaProduceBlindedBlockResponseJson struct {
+	Version string                         `json:"version" enum:"true"`
+	Data    *BlindedBeaconBlockCapellaJson `json:"data"`
+}
+
 func serializeProducedV2Block(response interface{}) (apimiddleware.RunDefault, []byte, apimiddleware.ErrorJson) {
 	respContainer, ok := response.(*ProduceBlockResponseV2Json)
 	if !ok {
@@ -712,6 +747,11 @@ func serializeProducedV2Block(response interface{}) (apimiddleware.RunDefault, [
 			Version: respContainer.Version,
 			Data:    respContainer.Data.BellatrixBlock,
 		}
+	case strings.EqualFold(respContainer.Version, strings.ToLower(ethpbv2.Version_CAPELLA.String())):
+		actualRespContainer = &capellaProduceBlockResponseJson{
+			Version: respContainer.Version,
+			Data:    respContainer.Data.CapellaBlock,
+		}
 	default:
 		return false, nil, apimiddleware.InternalServerError(fmt.Errorf("unsupported block version '%s'", respContainer.Version))
 	}
@@ -746,6 +786,11 @@ func serializeProducedBlindedBlock(response interface{}) (apimiddleware.RunDefau
 			Version: respContainer.Version,
 			Data:    respContainer.Data.BellatrixBlock,
 		}
+	case strings.EqualFold(respContainer.Version, strings.ToLower(ethpbv2.Version_CAPELLA.String())):
+		actualRespContainer = &capellaProduceBlindedBlockResponseJson{
+			Version: respContainer.Version,
+			Data:    respContainer.Data.CapellaBlock,
+		}
 	default:
 		return false, nil, apimiddleware.InternalServerError(fmt.Errorf("unsupported block version '%s'", respContainer.Version))
 	}

beacon-chain/rpc/apimiddleware/custom_hooks_test.go

@@ -100,6 +100,46 @@ func TestWrapValidatorIndicesArray(t *testing.T) {
 	})
 }
 
+func TestWrapBLSChangesArray(t *testing.T) {
+	t.Run("ok", func(t *testing.T) {
+		endpoint := &apimiddleware.Endpoint{
+			PostRequest: &SubmitBLSToExecutionChangesRequest{},
+		}
+		unwrappedChanges := []*SignedBLSToExecutionChangeJson{{Signature: "sig"}}
+		unwrappedChangesJson, err := json.Marshal(unwrappedChanges)
+		require.NoError(t, err)
+
+		var body bytes.Buffer
+		_, err = body.Write(unwrappedChangesJson)
+		require.NoError(t, err)
+		request := httptest.NewRequest("POST", "http://foo.example", &body)
+
+		runDefault, errJson := wrapBLSChangesArray(endpoint, nil, request)
+		require.Equal(t, true, errJson == nil)
+		assert.Equal(t, apimiddleware.RunDefault(true), runDefault)
+		wrappedChanges := &SubmitBLSToExecutionChangesRequest{}
+		require.NoError(t, json.NewDecoder(request.Body).Decode(wrappedChanges))
+		require.Equal(t, 1, len(wrappedChanges.Changes), "wrong number of wrapped items")
+		assert.Equal(t, "sig", wrappedChanges.Changes[0].Signature)
+	})
+
+	t.Run("invalid_body", func(t *testing.T) {
+		endpoint := &apimiddleware.Endpoint{
+			PostRequest: &SubmitBLSToExecutionChangesRequest{},
+		}
+		var body bytes.Buffer
+		_, err := body.Write([]byte("invalid"))
+		require.NoError(t, err)
+		request := httptest.NewRequest("POST", "http://foo.example", &body)
+
+		runDefault, errJson := wrapBLSChangesArray(endpoint, nil, request)
+		require.Equal(t, false, errJson == nil)
+		assert.Equal(t, apimiddleware.RunDefault(false), runDefault)
+		assert.Equal(t, true, strings.Contains(errJson.Msg(), "could not decode body"))
+		assert.Equal(t, http.StatusInternalServerError, errJson.StatusCode())
+	})
+}
+
 func TestWrapSignedAggregateAndProofArray(t *testing.T) {
 	t.Run("ok", func(t *testing.T) {
 		endpoint := &apimiddleware.Endpoint{
@@ -417,6 +457,26 @@ func TestSetInitialPublishBlockPostRequest(t *testing.T) {
 		assert.Equal(t, apimiddleware.RunDefault(true), runDefault)
 		assert.Equal(t, reflect.TypeOf(SignedBeaconBlockBellatrixContainerJson{}).Name(), reflect.Indirect(reflect.ValueOf(endpoint.PostRequest)).Type().Name())
 	})
+	t.Run("Capella", func(t *testing.T) {
+		params.SetupTestConfigCleanup(t)
+		cfg := params.BeaconConfig()
+		cfg.CapellaForkEpoch = cfg.BellatrixForkEpoch.Add(2)
+		params.OverrideBeaconConfig(cfg)
+
+		slot, err := slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+		require.NoError(t, err)
+		s.Message = struct{ Slot string }{Slot: strconv.FormatUint(uint64(slot), 10)}
+		j, err := json.Marshal(s)
+		require.NoError(t, err)
+		var body bytes.Buffer
+		_, err = body.Write(j)
+		require.NoError(t, err)
+		request := httptest.NewRequest("POST", "http://foo.example", &body)
+		runDefault, errJson := setInitialPublishBlockPostRequest(endpoint, nil, request)
+		require.Equal(t, true, errJson == nil)
+		assert.Equal(t, apimiddleware.RunDefault(true), runDefault)
+		assert.Equal(t, reflect.TypeOf(SignedBeaconBlockCapellaContainerJson{}).Name(), reflect.Indirect(reflect.ValueOf(endpoint.PostRequest)).Type().Name())
+	})
 }
 
 func TestPreparePublishedBlock(t *testing.T) {
@@ -1060,7 +1120,35 @@ func TestSerializeProducedV2Block(t *testing.T) {
 		require.Equal(t, nil, errJson)
 		require.Equal(t, apimiddleware.RunDefault(false), runDefault)
 		require.NotNil(t, j)
-		resp := &bellatrixProduceBlockResponseJson{}
+		resp := &capellaProduceBlockResponseJson{}
+		require.NoError(t, json.Unmarshal(j, resp))
+		require.NotNil(t, resp.Data)
+		require.NotNil(t, resp.Data)
+		beaconBlock := resp.Data
+		assert.Equal(t, "1", beaconBlock.Slot)
+		assert.Equal(t, "1", beaconBlock.ProposerIndex)
+		assert.Equal(t, "root", beaconBlock.ParentRoot)
+		assert.Equal(t, "root", beaconBlock.StateRoot)
+		require.NotNil(t, beaconBlock.Body)
+	})
+	t.Run("Capella", func(t *testing.T) {
+		response := &ProduceBlockResponseV2Json{
+			Version: ethpbv2.Version_CAPELLA.String(),
+			Data: &BeaconBlockContainerV2Json{
+				CapellaBlock: &BeaconBlockCapellaJson{
+					Slot:          "1",
+					ProposerIndex: "1",
+					ParentRoot:    "root",
+					StateRoot:     "root",
+					Body:          &BeaconBlockBodyCapellaJson{},
+				},
+			},
+		}
+		runDefault, j, errJson := serializeProducedV2Block(response)
+		require.Equal(t, nil, errJson)
+		require.Equal(t, apimiddleware.RunDefault(false), runDefault)
+		require.NotNil(t, j)
+		resp := &capellaProduceBlockResponseJson{}
 		require.NoError(t, json.Unmarshal(j, resp))
 		require.NotNil(t, resp.Data)
 		require.NotNil(t, resp.Data)
@@ -1071,7 +1159,6 @@ func TestSerializeProducedV2Block(t *testing.T) {
 		assert.Equal(t, "root", beaconBlock.StateRoot)
 		require.NotNil(t, beaconBlock.Body)
 	})
-
 	t.Run("incorrect response type", func(t *testing.T) {
 		response := &types.Empty{}
 		runDefault, j, errJson := serializeProducedV2Block(response)
@@ -1182,6 +1269,34 @@ func TestSerializeProduceBlindedBlock(t *testing.T) {
 		require.NotNil(t, beaconBlock.Body)
 	})
 
+	t.Run("Capella", func(t *testing.T) {
+		response := &ProduceBlindedBlockResponseJson{
+			Version: ethpbv2.Version_CAPELLA.String(),
+			Data: &BlindedBeaconBlockContainerJson{
+				CapellaBlock: &BlindedBeaconBlockCapellaJson{
+					Slot:          "1",
+					ProposerIndex: "1",
+					ParentRoot:    "root",
+					StateRoot:     "root",
+					Body:          &BlindedBeaconBlockBodyCapellaJson{},
+				},
+			},
+		}
+		runDefault, j, errJson := serializeProducedBlindedBlock(response)
+		require.Equal(t, nil, errJson)
+		require.Equal(t, apimiddleware.RunDefault(false), runDefault)
+		require.NotNil(t, j)
+		resp := &capellaProduceBlindedBlockResponseJson{}
+		require.NoError(t, json.Unmarshal(j, resp))
+		require.NotNil(t, resp.Data)
+		beaconBlock := resp.Data
+		assert.Equal(t, "1", beaconBlock.Slot)
+		assert.Equal(t, "1", beaconBlock.ProposerIndex)
+		assert.Equal(t, "root", beaconBlock.ParentRoot)
+		assert.Equal(t, "root", beaconBlock.StateRoot)
+		require.NotNil(t, beaconBlock.Body)
+	})
+
 	t.Run("incorrect response type", func(t *testing.T) {
 		response := &types.Empty{}
 		runDefault, j, errJson := serializeProducedV2Block(response)

beacon-chain/rpc/apimiddleware/endpoint_factory.go

@@ -39,6 +39,7 @@ func (_ *BeaconEndpointFactory) Paths() []string {
 		"/eth/v1/beacon/pool/attester_slashings",
 		"/eth/v1/beacon/pool/proposer_slashings",
 		"/eth/v1/beacon/pool/voluntary_exits",
+		"/eth/v1/beacon/pool/bls_to_execution_changes",
 		"/eth/v1/beacon/pool/sync_committees",
 		"/eth/v1/beacon/pool/bls_to_execution_changes",
 		"/eth/v1/beacon/weak_subjectivity",
@@ -162,14 +163,18 @@ func (_ *BeaconEndpointFactory) Create(path string) (*apimiddleware.Endpoint, er
 	case "/eth/v1/beacon/pool/voluntary_exits":
 		endpoint.PostRequest = &SignedVoluntaryExitJson{}
 		endpoint.GetResponse = &VoluntaryExitsPoolResponseJson{}
+	case "/eth/v1/beacon/pool/bls_to_execution_changes":
+		endpoint.PostRequest = &SubmitBLSToExecutionChangesRequest{}
+		endpoint.GetResponse = &BLSToExecutionChangesPoolResponseJson{}
+		endpoint.Hooks = apimiddleware.HookCollection{
+			OnPreDeserializeRequestBodyIntoContainer: wrapBLSChangesArray,
+		}
 	case "/eth/v1/beacon/pool/sync_committees":
 		endpoint.PostRequest = &SubmitSyncCommitteeSignaturesRequestJson{}
 		endpoint.Err = &IndexedVerificationFailureErrorJson{}
 		endpoint.Hooks = apimiddleware.HookCollection{
 			OnPreDeserializeRequestBodyIntoContainer: wrapSyncCommitteeSignaturesArray,
 		}
-	case "/eth/v1/beacon/pool/bls_to_execution_changes":
-		endpoint.GetResponse = &BLSToExecutionChangesPoolResponseJson{}
 	case "/eth/v1/beacon/weak_subjectivity":
 		endpoint.GetResponse = &WeakSubjectivityResponse{}
 	case "/eth/v1/node/identity":

beacon-chain/rpc/apimiddleware/structs.go

@@ -400,12 +400,14 @@ type BeaconBlockContainerV2Json struct {
 	Phase0Block    *BeaconBlockJson          `json:"phase0_block"`
 	AltairBlock    *BeaconBlockAltairJson    `json:"altair_block"`
 	BellatrixBlock *BeaconBlockBellatrixJson `json:"bellatrix_block"`
+	CapellaBlock   *BeaconBlockCapellaJson   `json:"capella_block"`
 }
 
 type BlindedBeaconBlockContainerJson struct {
 	Phase0Block    *BeaconBlockJson                 `json:"phase0_block"`
 	AltairBlock    *BeaconBlockAltairJson           `json:"altair_block"`
 	BellatrixBlock *BlindedBeaconBlockBellatrixJson `json:"bellatrix_block"`
+	CapellaBlock   *BlindedBeaconBlockCapellaJson   `json:"capella_block"`
 }
 
 type SignedBeaconBlockAltairContainerJson struct {
@@ -690,6 +692,10 @@ type BLSToExecutionChangeJson struct {
 	ToExecutionAddress string `json:"to_execution_address" hex:"true"`
 }
 
+type SubmitBLSToExecutionChangesRequest struct {
+	Changes []*SignedBLSToExecutionChangeJson `json:"changes"`
+}
+
 type DepositJson struct {
 	Proof []string          `json:"proof" hex:"true"`
 	Data  *Deposit_DataJson `json:"data"`
@@ -858,6 +864,7 @@ type BeaconStateCapellaJson struct {
 	LatestExecutionPayloadHeader *ExecutionPayloadHeaderCapellaJson `json:"latest_execution_payload_header"`
 	NextWithdrawalIndex          string                             `json:"next_withdrawal_index"`
 	NextWithdrawalValidatorIndex string                             `json:"next_withdrawal_validator_index"`
+	HistoricalSummaries          []*HistoricalSummaryJson           `json:"historical_summaries"`
 }
 
 type BeaconStateContainerV2Json struct {
@@ -1031,6 +1038,11 @@ type ForkChoiceDumpJson struct {
 	ForkChoiceNodes               []*ForkChoiceNodeJson `json:"fork_choice_nodes"`
 }
 
+type HistoricalSummaryJson struct {
+	BlockSummaryRoot string `json:"block_summary_root" hex:"true"`
+	StateSummaryRoot string `json:"state_summary_root" hex:"true"`
+}
+
 //----------------
 // SSZ
 // ---------------

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

@@ -87,11 +87,13 @@ go_test(
         "//beacon-chain/blockchain/testing:go_default_library",
         "//beacon-chain/builder/testing:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
+        "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/db/testing:go_default_library",
         "//beacon-chain/execution/testing:go_default_library",
         "//beacon-chain/operations/attestations:go_default_library",
+        "//beacon-chain/operations/blstoexec:go_default_library",
         "//beacon-chain/operations/blstoexec/mock:go_default_library",
         "//beacon-chain/operations/slashings/mock:go_default_library",
         "//beacon-chain/operations/synccommittee:go_default_library",
@@ -108,9 +110,11 @@ go_test(
         "//consensus-types/interfaces:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//crypto/bls:go_default_library",
+        "//crypto/bls/common:go_default_library",
         "//crypto/hash:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//encoding/ssz:go_default_library",
+        "//network/forks:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/eth/service:go_default_library",
         "//proto/eth/v1:go_default_library",

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

@@ -142,32 +142,25 @@ func (bs *Server) SubmitBlindedBlock(ctx context.Context, req *ethpbv2.SignedBli
 	ctx, span := trace.StartSpan(ctx, "beacon.SubmitBlindedBlock")
 	defer span.End()
 
-	capellaBlkContainer, ok := req.Message.(*ethpbv2.SignedBlindedBeaconBlockContainer_CapellaBlock)
-	if ok {
-		if err := bs.submitBlindedCapellaBlock(ctx, capellaBlkContainer.CapellaBlock, req.Signature); err != nil {
+	switch blkContainer := req.Message.(type) {
+	case *ethpbv2.SignedBlindedBeaconBlockContainer_CapellaBlock:
+		if err := bs.submitBlindedCapellaBlock(ctx, blkContainer.CapellaBlock, req.Signature); err != nil {
 			return nil, err
 		}
-	}
-
-	bellatrixBlkContainer, ok := req.Message.(*ethpbv2.SignedBlindedBeaconBlockContainer_BellatrixBlock)
-	if ok {
-		if err := bs.submitBlindedBellatrixBlock(ctx, bellatrixBlkContainer.BellatrixBlock, req.Signature); err != nil {
+	case *ethpbv2.SignedBlindedBeaconBlockContainer_BellatrixBlock:
+		if err := bs.submitBlindedBellatrixBlock(ctx, blkContainer.BellatrixBlock, req.Signature); err != nil {
 			return nil, err
 		}
-	}
-
-	// At the end we check forks that don't have blinded blocks.
-	phase0BlkContainer, ok := req.Message.(*ethpbv2.SignedBlindedBeaconBlockContainer_Phase0Block)
-	if ok {
-		if err := bs.submitPhase0Block(ctx, phase0BlkContainer.Phase0Block, req.Signature); err != nil {
+	case *ethpbv2.SignedBlindedBeaconBlockContainer_Phase0Block:
+		if err := bs.submitPhase0Block(ctx, blkContainer.Phase0Block, req.Signature); err != nil {
 			return nil, err
 		}
-	}
-	altairBlkContainer, ok := req.Message.(*ethpbv2.SignedBlindedBeaconBlockContainer_AltairBlock)
-	if ok {
-		if err := bs.submitAltairBlock(ctx, altairBlkContainer.AltairBlock, req.Signature); err != nil {
+	case *ethpbv2.SignedBlindedBeaconBlockContainer_AltairBlock:
+		if err := bs.submitAltairBlock(ctx, blkContainer.AltairBlock, req.Signature); err != nil {
 			return nil, err
 		}
+	default:
+		return nil, status.Errorf(codes.InvalidArgument, "Unsupported block container type %T", blkContainer)
 	}
 
 	return &emptypb.Empty{}, nil

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

@@ -220,29 +220,25 @@ func (bs *Server) SubmitBlock(ctx context.Context, req *ethpbv2.SignedBeaconBloc
 	ctx, span := trace.StartSpan(ctx, "beacon.SubmitBlock")
 	defer span.End()
 
-	phase0BlkContainer, ok := req.Message.(*ethpbv2.SignedBeaconBlockContainer_Phase0Block)
-	if ok {
-		if err := bs.submitPhase0Block(ctx, phase0BlkContainer.Phase0Block, req.Signature); err != nil {
+	switch blkContainer := req.Message.(type) {
+	case *ethpbv2.SignedBeaconBlockContainer_Phase0Block:
+		if err := bs.submitPhase0Block(ctx, blkContainer.Phase0Block, req.Signature); err != nil {
 			return nil, err
 		}
-	}
-	altairBlkContainer, ok := req.Message.(*ethpbv2.SignedBeaconBlockContainer_AltairBlock)
-	if ok {
-		if err := bs.submitAltairBlock(ctx, altairBlkContainer.AltairBlock, req.Signature); err != nil {
+	case *ethpbv2.SignedBeaconBlockContainer_AltairBlock:
+		if err := bs.submitAltairBlock(ctx, blkContainer.AltairBlock, req.Signature); err != nil {
 			return nil, err
 		}
-	}
-	bellatrixBlkContainer, ok := req.Message.(*ethpbv2.SignedBeaconBlockContainer_BellatrixBlock)
-	if ok {
-		if err := bs.submitBellatrixBlock(ctx, bellatrixBlkContainer.BellatrixBlock, req.Signature); err != nil {
+	case *ethpbv2.SignedBeaconBlockContainer_BellatrixBlock:
+		if err := bs.submitBellatrixBlock(ctx, blkContainer.BellatrixBlock, req.Signature); err != nil {
 			return nil, err
 		}
-	}
-	capellaBlkContainer, ok := req.Message.(*ethpbv2.SignedBeaconBlockContainer_CapellaBlock)
-	if ok {
-		if err := bs.submitCapellaBlock(ctx, capellaBlkContainer.CapellaBlock, req.Signature); err != nil {
+	case *ethpbv2.SignedBeaconBlockContainer_CapellaBlock:
+		if err := bs.submitCapellaBlock(ctx, blkContainer.CapellaBlock, req.Signature); err != nil {
 			return nil, err
 		}
+	default:
+		return nil, status.Errorf(codes.InvalidArgument, "Unsupported block container type %T", blkContainer)
 	}
 
 	return &emptypb.Empty{}, nil

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

@@ -6,6 +6,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/prysmaticlabs/go-bitfield"
 	mock "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
 	dbTest "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
@@ -43,13 +44,6 @@ func fillDBTestBlocks(ctx context.Context, t *testing.T, beaconDB db.Database) (
 		b := util.NewBeaconBlock()
 		b.Block.Slot = i
 		b.Block.ParentRoot = bytesutil.PadTo([]byte{uint8(i)}, 32)
-		att1 := util.NewAttestation()
-		att1.Data.Slot = i
-		att1.Data.CommitteeIndex = types.CommitteeIndex(i)
-		att2 := util.NewAttestation()
-		att2.Data.Slot = i
-		att2.Data.CommitteeIndex = types.CommitteeIndex(i + 1)
-		b.Block.Body.Attestations = []*ethpbalpha.Attestation{att1, att2}
 		root, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
 		blks[i], err = blocks.NewSignedBeaconBlock(b)
@@ -86,13 +80,12 @@ func fillDBTestBlocksAltair(ctx context.Context, t *testing.T, beaconDB db.Datab
 		b := util.NewBeaconBlockAltair()
 		b.Block.Slot = i
 		b.Block.ParentRoot = bytesutil.PadTo([]byte{uint8(i)}, 32)
-		att1 := util.NewAttestation()
-		att1.Data.Slot = i
-		att1.Data.CommitteeIndex = types.CommitteeIndex(i)
-		att2 := util.NewAttestation()
-		att2.Data.Slot = i
-		att2.Data.CommitteeIndex = types.CommitteeIndex(i + 1)
-		b.Block.Body.Attestations = []*ethpbalpha.Attestation{att1, att2}
+		syncCommitteeBits := bitfield.NewBitvector512()
+		syncCommitteeBits.SetBitAt(100, true)
+		b.Block.Body.SyncAggregate = &ethpbalpha.SyncAggregate{
+			SyncCommitteeBits:      syncCommitteeBits,
+			SyncCommitteeSignature: bytesutil.PadTo([]byte("signature"), 96),
+		}
 		root, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
 		signedB, err := blocks.NewSignedBeaconBlock(b)
@@ -128,13 +121,28 @@ func fillDBTestBlocksBellatrix(ctx context.Context, t *testing.T, beaconDB db.Da
 		b := util.NewBeaconBlockBellatrix()
 		b.Block.Slot = i
 		b.Block.ParentRoot = bytesutil.PadTo([]byte{uint8(i)}, 32)
-		att1 := util.NewAttestation()
-		att1.Data.Slot = i
-		att1.Data.CommitteeIndex = types.CommitteeIndex(i)
-		att2 := util.NewAttestation()
-		att2.Data.Slot = i
-		att2.Data.CommitteeIndex = types.CommitteeIndex(i + 1)
-		b.Block.Body.Attestations = []*ethpbalpha.Attestation{att1, att2}
+		syncCommitteeBits := bitfield.NewBitvector512()
+		syncCommitteeBits.SetBitAt(100, true)
+		b.Block.Body.SyncAggregate = &ethpbalpha.SyncAggregate{
+			SyncCommitteeBits:      syncCommitteeBits,
+			SyncCommitteeSignature: bytesutil.PadTo([]byte("signature"), 96),
+		}
+		b.Block.Body.ExecutionPayload = &enginev1.ExecutionPayload{
+			ParentHash:    bytesutil.PadTo([]byte("parent_hash"), 32),
+			FeeRecipient:  bytesutil.PadTo([]byte("fee_recipient"), 20),
+			StateRoot:     bytesutil.PadTo([]byte("state_root"), 32),
+			ReceiptsRoot:  bytesutil.PadTo([]byte("receipts_root"), 32),
+			LogsBloom:     bytesutil.PadTo([]byte("logs_bloom"), 256),
+			PrevRandao:    bytesutil.PadTo([]byte("prev_randao"), 32),
+			BlockNumber:   123,
+			GasLimit:      123,
+			GasUsed:       123,
+			Timestamp:     123,
+			ExtraData:     bytesutil.PadTo([]byte("extra_data"), 32),
+			BaseFeePerGas: bytesutil.PadTo([]byte("base_fee_per_gas"), 32),
+			BlockHash:     bytesutil.PadTo([]byte("block_hash"), 32),
+			Transactions:  [][]byte{[]byte("transaction1"), []byte("transaction2")},
+		}
 		root, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
 		signedB, err := blocks.NewSignedBeaconBlock(b)
@@ -170,13 +178,42 @@ func fillDBTestBlocksCapella(ctx context.Context, t *testing.T, beaconDB db.Data
 		b := util.NewBeaconBlockCapella()
 		b.Block.Slot = i
 		b.Block.ParentRoot = bytesutil.PadTo([]byte{uint8(i)}, 32)
-		att1 := util.NewAttestation()
-		att1.Data.Slot = i
-		att1.Data.CommitteeIndex = types.CommitteeIndex(i)
-		att2 := util.NewAttestation()
-		att2.Data.Slot = i
-		att2.Data.CommitteeIndex = types.CommitteeIndex(i + 1)
-		b.Block.Body.Attestations = []*ethpbalpha.Attestation{att1, att2}
+		syncCommitteeBits := bitfield.NewBitvector512()
+		syncCommitteeBits.SetBitAt(100, true)
+		b.Block.Body.SyncAggregate = &ethpbalpha.SyncAggregate{
+			SyncCommitteeBits:      syncCommitteeBits,
+			SyncCommitteeSignature: bytesutil.PadTo([]byte("signature"), 96),
+		}
+		b.Block.Body.ExecutionPayload = &enginev1.ExecutionPayloadCapella{
+			ParentHash:    bytesutil.PadTo([]byte("parent_hash"), 32),
+			FeeRecipient:  bytesutil.PadTo([]byte("fee_recipient"), 20),
+			StateRoot:     bytesutil.PadTo([]byte("state_root"), 32),
+			ReceiptsRoot:  bytesutil.PadTo([]byte("receipts_root"), 32),
+			LogsBloom:     bytesutil.PadTo([]byte("logs_bloom"), 256),
+			PrevRandao:    bytesutil.PadTo([]byte("prev_randao"), 32),
+			BlockNumber:   123,
+			GasLimit:      123,
+			GasUsed:       123,
+			Timestamp:     123,
+			ExtraData:     bytesutil.PadTo([]byte("extra_data"), 32),
+			BaseFeePerGas: bytesutil.PadTo([]byte("base_fee_per_gas"), 32),
+			BlockHash:     bytesutil.PadTo([]byte("block_hash"), 32),
+			Transactions:  [][]byte{[]byte("transaction1"), []byte("transaction2")},
+			Withdrawals: []*enginev1.Withdrawal{
+				{
+					Index:          1,
+					ValidatorIndex: 1,
+					Address:        bytesutil.PadTo([]byte("address1"), 20),
+					Amount:         1,
+				},
+				{
+					Index:          2,
+					ValidatorIndex: 2,
+					Address:        bytesutil.PadTo([]byte("address2"), 20),
+					Amount:         2,
+				},
+			},
+		}
 		root, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
 		signedB, err := blocks.NewSignedBeaconBlock(b)
@@ -212,13 +249,28 @@ func fillDBTestBlocksBellatrixBlinded(ctx context.Context, t *testing.T, beaconD
 		b := util.NewBlindedBeaconBlockBellatrix()
 		b.Block.Slot = i
 		b.Block.ParentRoot = bytesutil.PadTo([]byte{uint8(i)}, 32)
-		att1 := util.NewAttestation()
-		att1.Data.Slot = i
-		att1.Data.CommitteeIndex = types.CommitteeIndex(i)
-		att2 := util.NewAttestation()
-		att2.Data.Slot = i
-		att2.Data.CommitteeIndex = types.CommitteeIndex(i + 1)
-		b.Block.Body.Attestations = []*ethpbalpha.Attestation{att1, att2}
+		syncCommitteeBits := bitfield.NewBitvector512()
+		syncCommitteeBits.SetBitAt(100, true)
+		b.Block.Body.SyncAggregate = &ethpbalpha.SyncAggregate{
+			SyncCommitteeBits:      syncCommitteeBits,
+			SyncCommitteeSignature: bytesutil.PadTo([]byte("signature"), 96),
+		}
+		b.Block.Body.ExecutionPayloadHeader = &enginev1.ExecutionPayloadHeader{
+			ParentHash:       bytesutil.PadTo([]byte("parent_hash"), 32),
+			FeeRecipient:     bytesutil.PadTo([]byte("fee_recipient"), 20),
+			StateRoot:        bytesutil.PadTo([]byte("state_root"), 32),
+			ReceiptsRoot:     bytesutil.PadTo([]byte("receipts_root"), 32),
+			LogsBloom:        bytesutil.PadTo([]byte("logs_bloom"), 256),
+			PrevRandao:       bytesutil.PadTo([]byte("prev_randao"), 32),
+			BlockNumber:      123,
+			GasLimit:         123,
+			GasUsed:          123,
+			Timestamp:        123,
+			ExtraData:        bytesutil.PadTo([]byte("extra_data"), 32),
+			BaseFeePerGas:    bytesutil.PadTo([]byte("base_fee_per_gas"), 32),
+			BlockHash:        bytesutil.PadTo([]byte("block_hash"), 32),
+			TransactionsRoot: bytesutil.PadTo([]byte("transactions_root"), 32),
+		}
 		root, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
 		signedB, err := blocks.NewSignedBeaconBlock(b)
@@ -254,13 +306,29 @@ func fillDBTestBlocksCapellaBlinded(ctx context.Context, t *testing.T, beaconDB
 		b := util.NewBlindedBeaconBlockCapella()
 		b.Block.Slot = i
 		b.Block.ParentRoot = bytesutil.PadTo([]byte{uint8(i)}, 32)
-		att1 := util.NewAttestation()
-		att1.Data.Slot = i
-		att1.Data.CommitteeIndex = types.CommitteeIndex(i)
-		att2 := util.NewAttestation()
-		att2.Data.Slot = i
-		att2.Data.CommitteeIndex = types.CommitteeIndex(i + 1)
-		b.Block.Body.Attestations = []*ethpbalpha.Attestation{att1, att2}
+		syncCommitteeBits := bitfield.NewBitvector512()
+		syncCommitteeBits.SetBitAt(100, true)
+		b.Block.Body.SyncAggregate = &ethpbalpha.SyncAggregate{
+			SyncCommitteeBits:      syncCommitteeBits,
+			SyncCommitteeSignature: bytesutil.PadTo([]byte("signature"), 96),
+		}
+		b.Block.Body.ExecutionPayloadHeader = &enginev1.ExecutionPayloadHeaderCapella{
+			ParentHash:       bytesutil.PadTo([]byte("parent_hash"), 32),
+			FeeRecipient:     bytesutil.PadTo([]byte("fee_recipient"), 20),
+			StateRoot:        bytesutil.PadTo([]byte("state_root"), 32),
+			ReceiptsRoot:     bytesutil.PadTo([]byte("receipts_root"), 32),
+			LogsBloom:        bytesutil.PadTo([]byte("logs_bloom"), 256),
+			PrevRandao:       bytesutil.PadTo([]byte("prev_randao"), 32),
+			BlockNumber:      123,
+			GasLimit:         123,
+			GasUsed:          123,
+			Timestamp:        123,
+			ExtraData:        bytesutil.PadTo([]byte("extra_data"), 32),
+			BaseFeePerGas:    bytesutil.PadTo([]byte("base_fee_per_gas"), 32),
+			BlockHash:        bytesutil.PadTo([]byte("block_hash"), 32),
+			TransactionsRoot: bytesutil.PadTo([]byte("transactions_root"), 32),
+			WithdrawalsRoot:  bytesutil.PadTo([]byte("withdrawals_root"), 32),
+		}
 		root, err := b.Block.HashTreeRoot()
 		require.NoError(t, err)
 		signedB, err := blocks.NewSignedBeaconBlock(b)

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

@@ -9,6 +9,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v3/network/forks"
 	"github.com/prysmaticlabs/prysm/v3/testing/assert"
 	"github.com/prysmaticlabs/prysm/v3/testing/require"
 	"google.golang.org/protobuf/types/known/emptypb"
@@ -49,8 +50,6 @@ func TestGetSpec(t *testing.T) {
 	config.AltairForkEpoch = 100
 	config.BellatrixForkVersion = []byte("BellatrixForkVersion")
 	config.BellatrixForkEpoch = 101
-	config.ShardingForkVersion = []byte("ShardingForkVersion")
-	config.ShardingForkEpoch = 102
 	config.CapellaForkVersion = []byte("CapellaForkVersion")
 	config.CapellaForkEpoch = 103
 	config.BLSWithdrawalPrefixByte = byte('b')
@@ -138,7 +137,7 @@ func TestGetSpec(t *testing.T) {
 	resp, err := server.GetSpec(context.Background(), &emptypb.Empty{})
 	require.NoError(t, err)
 
-	assert.Equal(t, 105, len(resp.Data))
+	assert.Equal(t, 103, len(resp.Data))
 	for k, v := range resp.Data {
 		switch k {
 		case "CONFIG_NAME":
@@ -203,10 +202,6 @@ func TestGetSpec(t *testing.T) {
 			assert.Equal(t, "0x"+hex.EncodeToString([]byte("BellatrixForkVersion")), v)
 		case "BELLATRIX_FORK_EPOCH":
 			assert.Equal(t, "101", v)
-		case "SHARDING_FORK_VERSION":
-			assert.Equal(t, "0x"+hex.EncodeToString([]byte("ShardingForkVersion")), v)
-		case "SHARDING_FORK_EPOCH":
-			assert.Equal(t, "102", v)
 		case "CAPELLA_FORK_VERSION":
 			assert.Equal(t, "0x"+hex.EncodeToString([]byte("CapellaForkVersion")), v)
 		case "CAPELLA_FORK_EPOCH":
@@ -425,6 +420,6 @@ func TestForkSchedule_CorrectNumberOfForks(t *testing.T) {
 	s := &Server{}
 	resp, err := s.GetForkSchedule(context.Background(), &emptypb.Empty{})
 	require.NoError(t, err)
-	// Genesis and Altair.
-	assert.Equal(t, 3, len(resp.Data))
+	os := forks.NewOrderedSchedule(params.BeaconConfig())
+	assert.Equal(t, os.Len(), len(resp.Data))
 }

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

@@ -13,7 +13,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/config/features"
 	"github.com/prysmaticlabs/prysm/v3/crypto/bls"
 	ethpbv1 "github.com/prysmaticlabs/prysm/v3/proto/eth/v1"
-	v2 "github.com/prysmaticlabs/prysm/v3/proto/eth/v2"
+	ethpbv2 "github.com/prysmaticlabs/prysm/v3/proto/eth/v2"
 	"github.com/prysmaticlabs/prysm/v3/proto/migration"
 	ethpbalpha "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v3/time/slots"
@@ -306,8 +306,39 @@ func (bs *Server) SubmitVoluntaryExit(ctx context.Context, req *ethpbv1.SignedVo
 	return &emptypb.Empty{}, nil
 }
 
+// SubmitSignedBLSToExecutionChanges submits said object to the node's pool
+// if it passes validation the node must broadcast it to the network.
+func (bs *Server) SubmitSignedBLSToExecutionChanges(ctx context.Context, req *ethpbv2.SubmitBLSToExecutionChangesRequest) (*emptypb.Empty, error) {
+	ctx, span := trace.StartSpan(ctx, "beacon.SubmitSignedBLSToExecutionChanges")
+	defer span.End()
+	var failures []*helpers.SingleIndexedVerificationFailure
+	for _, change := range req.GetChanges() {
+		alphaChange := migration.V2SignedBLSToExecutionChangeToV1Alpha1(change)
+		bs.OperationNotifier.OperationFeed().Send(&feed.Event{
+			Type: operation.BLSToExecutionChangeReceived,
+			Data: &operation.BLSToExecutionChangeReceivedData{
+				Change: alphaChange,
+			},
+		})
+		bs.BLSChangesPool.InsertBLSToExecChange(alphaChange)
+	}
+	if len(failures) > 0 {
+		failuresContainer := &helpers.IndexedVerificationFailure{Failures: failures}
+		err := grpc.AppendCustomErrorHeader(ctx, failuresContainer)
+		if err != nil {
+			return nil, status.Errorf(
+				codes.InvalidArgument,
+				"One or more BLSToExecutionChange failed validation. Could not prepare BLSToExecutionChange failure information: %v",
+				err,
+			)
+		}
+		return nil, status.Errorf(codes.InvalidArgument, "One or more BLSToExecutionChange failed validation")
+	}
+	return &emptypb.Empty{}, nil
+}
+
 // ListBLSToExecutionChanges retrieves BLS to execution changes known by the node but not necessarily incorporated into any block
-func (bs *Server) ListBLSToExecutionChanges(ctx context.Context, _ *emptypb.Empty) (*v2.BLSToExecutionChangesPoolResponse, error) {
+func (bs *Server) ListBLSToExecutionChanges(ctx context.Context, _ *emptypb.Empty) (*ethpbv2.BLSToExecutionChangesPoolResponse, error) {
 	ctx, span := trace.StartSpan(ctx, "beacon.ListBLSToExecutionChanges")
 	defer span.End()
 
@@ -316,12 +347,12 @@ func (bs *Server) ListBLSToExecutionChanges(ctx context.Context, _ *emptypb.Empt
 		return nil, status.Errorf(codes.Internal, "Could not get BLS to execution changes: %v", err)
 	}
 
-	changes := make([]*v2.SignedBLSToExecutionChange, len(sourceChanges))
+	changes := make([]*ethpbv2.SignedBLSToExecutionChange, len(sourceChanges))
 	for i, ch := range sourceChanges {
 		changes[i] = migration.V1Alpha1SignedBLSToExecChangeToV2(ch)
 	}
 
-	return &v2.BLSToExecutionChangesPoolResponse{
+	return &ethpbv2.BLSToExecutionChangesPoolResponse{
 		Data: changes,
 	}, nil
 }

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

@@ -11,17 +11,24 @@ import (
 	grpcutil "github.com/prysmaticlabs/prysm/v3/api/grpc"
 	blockchainmock "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
 	blstoexecmock "github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec/mock"
 	slashingsmock "github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/slashings/mock"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits/mock"
 	p2pMock "github.com/prysmaticlabs/prysm/v3/beacon-chain/p2p/testing"
+	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	eth2types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/crypto/bls"
+	"github.com/prysmaticlabs/prysm/v3/crypto/bls/common"
+	"github.com/prysmaticlabs/prysm/v3/crypto/hash"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v3/encoding/ssz"
 	ethpbv1 "github.com/prysmaticlabs/prysm/v3/proto/eth/v1"
+	ethpbv2 "github.com/prysmaticlabs/prysm/v3/proto/eth/v2"
 	"github.com/prysmaticlabs/prysm/v3/proto/migration"
 	ethpbv1alpha1 "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v3/testing/assert"
@@ -1187,3 +1194,299 @@ func TestListBLSToExecutionChanges(t *testing.T) {
 	assert.DeepEqual(t, migration.V1Alpha1SignedBLSToExecChangeToV2(change1), resp.Data[0])
 	assert.DeepEqual(t, migration.V1Alpha1SignedBLSToExecChangeToV2(change2), resp.Data[1])
 }
+
+func TestSubmitSignedBLSToExecutionChanges_Ok(t *testing.T) {
+	ctx := context.Background()
+	params.SetupTestConfigCleanup(t)
+	c := params.BeaconConfig().Copy()
+	// Required for correct committee size calculation.
+	c.CapellaForkEpoch = c.BellatrixForkEpoch.Add(2)
+	params.OverrideBeaconConfig(c)
+
+	spb := &ethpbv1alpha1.BeaconStateCapella{
+		Fork: &ethpbv1alpha1.Fork{
+			CurrentVersion:  params.BeaconConfig().GenesisForkVersion,
+			PreviousVersion: params.BeaconConfig().GenesisForkVersion,
+			Epoch:           params.BeaconConfig().CapellaForkEpoch,
+		},
+	}
+	numValidators := 10
+	validators := make([]*ethpbv1alpha1.Validator, numValidators)
+	blsChanges := make([]*ethpbv2.BLSToExecutionChange, numValidators)
+	spb.Balances = make([]uint64, numValidators)
+	privKeys := make([]common.SecretKey, numValidators)
+	maxEffectiveBalance := params.BeaconConfig().MaxEffectiveBalance
+	executionAddress := []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13}
+
+	for i := range validators {
+		v := &ethpbv1alpha1.Validator{}
+		v.EffectiveBalance = maxEffectiveBalance
+		v.WithdrawableEpoch = params.BeaconConfig().FarFutureEpoch
+		v.WithdrawalCredentials = make([]byte, 32)
+		priv, err := bls.RandKey()
+		require.NoError(t, err)
+		privKeys[i] = priv
+		pubkey := priv.PublicKey().Marshal()
+
+		message := &ethpbv2.BLSToExecutionChange{
+			ToExecutionAddress: executionAddress,
+			ValidatorIndex:     eth2types.ValidatorIndex(i),
+			FromBlsPubkey:      pubkey,
+		}
+
+		hashFn := ssz.NewHasherFunc(hash.CustomSHA256Hasher())
+		digest := hashFn.Hash(pubkey)
+		digest[0] = params.BeaconConfig().BLSWithdrawalPrefixByte
+		copy(v.WithdrawalCredentials, digest[:])
+		validators[i] = v
+		blsChanges[i] = message
+	}
+	spb.Validators = validators
+	slot, err := slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	require.NoError(t, err)
+	spb.Slot = slot
+	st, err := state_native.InitializeFromProtoCapella(spb)
+	require.NoError(t, err)
+
+	signedChanges := make([]*ethpbv2.SignedBLSToExecutionChange, numValidators)
+	for i, message := range blsChanges {
+		signature, err := signing.ComputeDomainAndSign(st, time.CurrentEpoch(st), message, params.BeaconConfig().DomainBLSToExecutionChange, privKeys[i])
+		require.NoError(t, err)
+
+		signed := &ethpbv2.SignedBLSToExecutionChange{
+			Message:   message,
+			Signature: signature,
+		}
+		signedChanges[i] = signed
+	}
+
+	broadcaster := &p2pMock.MockBroadcaster{}
+	chainService := &blockchainmock.ChainService{State: st}
+	s := &Server{
+		HeadFetcher:       chainService,
+		ChainInfoFetcher:  chainService,
+		AttestationsPool:  attestations.NewPool(),
+		Broadcaster:       broadcaster,
+		OperationNotifier: &blockchainmock.MockOperationNotifier{},
+		BLSChangesPool:    blstoexec.NewPool(),
+	}
+
+	_, err = s.SubmitSignedBLSToExecutionChanges(ctx, &ethpbv2.SubmitBLSToExecutionChangesRequest{
+		Changes: signedChanges,
+	})
+	require.NoError(t, err)
+	assert.Equal(t, true, broadcaster.BroadcastCalled)
+	assert.Equal(t, numValidators, len(broadcaster.BroadcastMessages))
+
+	poolChanges, err := s.BLSChangesPool.PendingBLSToExecChanges()
+	require.Equal(t, len(poolChanges), len(signedChanges))
+	require.NoError(t, err)
+	for i, v1alphaChange := range poolChanges {
+		v2Change := migration.V1Alpha1SignedBLSToExecChangeToV2(v1alphaChange)
+		require.DeepEqual(t, v2Change, signedChanges[i])
+	}
+}
+
+func TestSubmitSignedBLSToExecutionChanges_Bellatrix(t *testing.T) {
+	ctx := context.Background()
+	params.SetupTestConfigCleanup(t)
+	c := params.BeaconConfig().Copy()
+	// Required for correct committee size calculation.
+	c.CapellaForkEpoch = c.BellatrixForkEpoch.Add(2)
+	params.OverrideBeaconConfig(c)
+
+	spb := &ethpbv1alpha1.BeaconStateBellatrix{
+		Fork: &ethpbv1alpha1.Fork{
+			CurrentVersion:  params.BeaconConfig().BellatrixForkVersion,
+			PreviousVersion: params.BeaconConfig().AltairForkVersion,
+			Epoch:           params.BeaconConfig().BellatrixForkEpoch,
+		},
+	}
+	numValidators := 10
+	validators := make([]*ethpbv1alpha1.Validator, numValidators)
+	blsChanges := make([]*ethpbv2.BLSToExecutionChange, numValidators)
+	spb.Balances = make([]uint64, numValidators)
+	privKeys := make([]common.SecretKey, numValidators)
+	maxEffectiveBalance := params.BeaconConfig().MaxEffectiveBalance
+	executionAddress := []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13}
+
+	for i := range validators {
+		v := &ethpbv1alpha1.Validator{}
+		v.EffectiveBalance = maxEffectiveBalance
+		v.WithdrawableEpoch = params.BeaconConfig().FarFutureEpoch
+		v.WithdrawalCredentials = make([]byte, 32)
+		priv, err := bls.RandKey()
+		require.NoError(t, err)
+		privKeys[i] = priv
+		pubkey := priv.PublicKey().Marshal()
+
+		message := &ethpbv2.BLSToExecutionChange{
+			ToExecutionAddress: executionAddress,
+			ValidatorIndex:     eth2types.ValidatorIndex(i),
+			FromBlsPubkey:      pubkey,
+		}
+
+		hashFn := ssz.NewHasherFunc(hash.CustomSHA256Hasher())
+		digest := hashFn.Hash(pubkey)
+		digest[0] = params.BeaconConfig().BLSWithdrawalPrefixByte
+		copy(v.WithdrawalCredentials, digest[:])
+		validators[i] = v
+		blsChanges[i] = message
+	}
+	spb.Validators = validators
+	slot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
+	require.NoError(t, err)
+	spb.Slot = slot
+	st, err := state_native.InitializeFromProtoBellatrix(spb)
+	require.NoError(t, err)
+
+	spc := &ethpbv1alpha1.BeaconStateCapella{
+		Fork: &ethpbv1alpha1.Fork{
+			CurrentVersion:  params.BeaconConfig().GenesisForkVersion,
+			PreviousVersion: params.BeaconConfig().GenesisForkVersion,
+			Epoch:           params.BeaconConfig().CapellaForkEpoch,
+		},
+	}
+	slot, err = slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	require.NoError(t, err)
+	spc.Slot = slot
+
+	stc, err := state_native.InitializeFromProtoCapella(spc)
+	require.NoError(t, err)
+
+	signedChanges := make([]*ethpbv2.SignedBLSToExecutionChange, numValidators)
+	for i, message := range blsChanges {
+		signature, err := signing.ComputeDomainAndSign(stc, time.CurrentEpoch(stc), message, params.BeaconConfig().DomainBLSToExecutionChange, privKeys[i])
+		require.NoError(t, err)
+
+		signed := &ethpbv2.SignedBLSToExecutionChange{
+			Message:   message,
+			Signature: signature,
+		}
+		signedChanges[i] = signed
+	}
+
+	broadcaster := &p2pMock.MockBroadcaster{}
+	chainService := &blockchainmock.ChainService{State: st}
+	s := &Server{
+		HeadFetcher:       chainService,
+		ChainInfoFetcher:  chainService,
+		AttestationsPool:  attestations.NewPool(),
+		Broadcaster:       broadcaster,
+		OperationNotifier: &blockchainmock.MockOperationNotifier{},
+		BLSChangesPool:    blstoexec.NewPool(),
+	}
+
+	_, err = s.SubmitSignedBLSToExecutionChanges(ctx, &ethpbv2.SubmitBLSToExecutionChangesRequest{
+		Changes: signedChanges,
+	})
+	require.NoError(t, err)
+
+	// Check that we didn't broadcast the messages but did in fact fill in
+	// the pool
+	assert.Equal(t, false, broadcaster.BroadcastCalled)
+
+	poolChanges, err := s.BLSChangesPool.PendingBLSToExecChanges()
+	require.Equal(t, len(poolChanges), len(signedChanges))
+	require.NoError(t, err)
+	for i, v1alphaChange := range poolChanges {
+		v2Change := migration.V1Alpha1SignedBLSToExecChangeToV2(v1alphaChange)
+		require.DeepEqual(t, v2Change, signedChanges[i])
+	}
+}
+
+func TestSubmitSignedBLSToExecutionChanges_Failures(t *testing.T) {
+	ctx := context.Background()
+	params.SetupTestConfigCleanup(t)
+	c := params.BeaconConfig().Copy()
+	// Required for correct committee size calculation.
+	c.CapellaForkEpoch = c.BellatrixForkEpoch.Add(2)
+	params.OverrideBeaconConfig(c)
+
+	spb := &ethpbv1alpha1.BeaconStateCapella{
+		Fork: &ethpbv1alpha1.Fork{
+			CurrentVersion:  params.BeaconConfig().GenesisForkVersion,
+			PreviousVersion: params.BeaconConfig().GenesisForkVersion,
+			Epoch:           params.BeaconConfig().CapellaForkEpoch,
+		},
+	}
+	numValidators := 10
+	validators := make([]*ethpbv1alpha1.Validator, numValidators)
+	blsChanges := make([]*ethpbv2.BLSToExecutionChange, numValidators)
+	spb.Balances = make([]uint64, numValidators)
+	privKeys := make([]common.SecretKey, numValidators)
+	maxEffectiveBalance := params.BeaconConfig().MaxEffectiveBalance
+	executionAddress := []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13}
+
+	for i := range validators {
+		v := &ethpbv1alpha1.Validator{}
+		v.EffectiveBalance = maxEffectiveBalance
+		v.WithdrawableEpoch = params.BeaconConfig().FarFutureEpoch
+		v.WithdrawalCredentials = make([]byte, 32)
+		priv, err := bls.RandKey()
+		require.NoError(t, err)
+		privKeys[i] = priv
+		pubkey := priv.PublicKey().Marshal()
+
+		message := &ethpbv2.BLSToExecutionChange{
+			ToExecutionAddress: executionAddress,
+			ValidatorIndex:     eth2types.ValidatorIndex(i),
+			FromBlsPubkey:      pubkey,
+		}
+
+		hashFn := ssz.NewHasherFunc(hash.CustomSHA256Hasher())
+		digest := hashFn.Hash(pubkey)
+		digest[0] = params.BeaconConfig().BLSWithdrawalPrefixByte
+		copy(v.WithdrawalCredentials, digest[:])
+		validators[i] = v
+		blsChanges[i] = message
+	}
+	spb.Validators = validators
+	slot, err := slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	require.NoError(t, err)
+	spb.Slot = slot
+	st, err := state_native.InitializeFromProtoCapella(spb)
+	require.NoError(t, err)
+
+	signedChanges := make([]*ethpbv2.SignedBLSToExecutionChange, numValidators)
+	for i, message := range blsChanges {
+		signature, err := signing.ComputeDomainAndSign(st, time.CurrentEpoch(st), message, params.BeaconConfig().DomainBLSToExecutionChange, privKeys[i])
+		require.NoError(t, err)
+
+		signed := &ethpbv2.SignedBLSToExecutionChange{
+			Message:   message,
+			Signature: signature,
+		}
+		signedChanges[i] = signed
+	}
+	signedChanges[1].Signature[0] = 0x00
+
+	broadcaster := &p2pMock.MockBroadcaster{}
+	chainService := &blockchainmock.ChainService{State: st}
+	s := &Server{
+		HeadFetcher:       chainService,
+		ChainInfoFetcher:  chainService,
+		AttestationsPool:  attestations.NewPool(),
+		Broadcaster:       broadcaster,
+		OperationNotifier: &blockchainmock.MockOperationNotifier{},
+		BLSChangesPool:    blstoexec.NewPool(),
+	}
+
+	_, err = s.SubmitSignedBLSToExecutionChanges(ctx, &ethpbv2.SubmitBLSToExecutionChangesRequest{
+		Changes: signedChanges,
+	})
+	require.ErrorContains(t, "One or more BLSToExecutionChange failed validation", err)
+	assert.Equal(t, true, broadcaster.BroadcastCalled)
+	assert.Equal(t, numValidators, len(broadcaster.BroadcastMessages)+1)
+
+	poolChanges, err := s.BLSChangesPool.PendingBLSToExecChanges()
+	require.Equal(t, len(poolChanges)+1, len(signedChanges))
+	require.NoError(t, err)
+
+	v2Change := migration.V1Alpha1SignedBLSToExecChangeToV2(poolChanges[0])
+	require.DeepEqual(t, v2Change, signedChanges[0])
+	for i := 2; i < numValidators; i++ {
+		v2Change := migration.V1Alpha1SignedBLSToExecChangeToV2(poolChanges[i-1])
+		require.DeepEqual(t, v2Change, signedChanges[i])
+	}
+}

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

@@ -33,6 +33,8 @@ const (
 	ChainReorgTopic = "chain_reorg"
 	// SyncCommitteeContributionTopic represents a new sync committee contribution event topic.
 	SyncCommitteeContributionTopic = "contribution_and_proof"
+	// BLSToExecutionChangeTopic represents a new received BLS to execution change event topic.
+	BLSToExecutionChangeTopic = "bls_to_execution_change"
 )
 
 var casesHandled = map[string]bool{
@@ -43,6 +45,7 @@ var casesHandled = map[string]bool{
 	FinalizedCheckpointTopic:       true,
 	ChainReorgTopic:                true,
 	SyncCommitteeContributionTopic: true,
+	BLSToExecutionChangeTopic:      true,
 }
 
 // StreamEvents allows requesting all events from a set of topics defined in the Ethereum consensus API standard.
@@ -178,6 +181,16 @@ func handleBlockOperationEvents(
 		}
 		v2Data := migration.V1Alpha1SignedContributionAndProofToV2(contributionData.Contribution)
 		return streamData(stream, SyncCommitteeContributionTopic, v2Data)
+	case operation.BLSToExecutionChangeReceived:
+		if _, ok := requestedTopics[BLSToExecutionChangeTopic]; !ok {
+			return nil
+		}
+		changeData, ok := event.Data.(*operation.BLSToExecutionChangeReceivedData)
+		if !ok {
+			return nil
+		}
+		v2Change := migration.V1Alpha1SignedBLSToExecChangeToV2(changeData.Change)
+		return streamData(stream, BLSToExecutionChangeTopic, v2Change)
 	default:
 		return nil
 	}

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

@@ -238,6 +238,43 @@ func TestStreamEvents_OperationsEvents(t *testing.T) {
 			feed: srv.OperationNotifier.OperationFeed(),
 		})
 	})
+	t.Run(BLSToExecutionChangeTopic, func(t *testing.T) {
+		ctx := context.Background()
+		srv, ctrl, mockStream := setupServer(ctx, t)
+		defer ctrl.Finish()
+
+		wantedChangeV1alpha1 := &eth.SignedBLSToExecutionChange{
+			Message: &eth.BLSToExecutionChange{
+				ValidatorIndex:     1,
+				FromBlsPubkey:      []byte("from"),
+				ToExecutionAddress: []byte("to"),
+			},
+			Signature: make([]byte, 96),
+		}
+		wantedChange := migration.V1Alpha1SignedBLSToExecChangeToV2(wantedChangeV1alpha1)
+		genericResponse, err := anypb.New(wantedChange)
+		require.NoError(t, err)
+
+		wantedMessage := &gateway.EventSource{
+			Event: BLSToExecutionChangeTopic,
+			Data:  genericResponse,
+		}
+
+		assertFeedSendAndReceive(ctx, &assertFeedArgs{
+			t:             t,
+			srv:           srv,
+			topics:        []string{BLSToExecutionChangeTopic},
+			stream:        mockStream,
+			shouldReceive: wantedMessage,
+			itemToSend: &feed.Event{
+				Type: operation.BLSToExecutionChangeReceived,
+				Data: &operation.BLSToExecutionChangeReceivedData{
+					Change: wantedChangeV1alpha1,
+				},
+			},
+			feed: srv.OperationNotifier.OperationFeed(),
+		})
+	})
 }
 
 func TestStreamEvents_StateEvents(t *testing.T) {

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

@@ -500,16 +500,9 @@ func (vs *Server) ProduceBlindedBlock(ctx context.Context, req *ethpbv1.ProduceB
 	if optimistic {
 		return nil, status.Errorf(codes.Unavailable, "The node is currently optimistic and cannot serve validators")
 	}
-	altairBlk, err := vs.V1Alpha1Server.BuildAltairBeaconBlock(ctx, v1alpha1req)
+	b, err := vs.V1Alpha1Server.GetBeaconBlock(ctx, v1alpha1req)
 	if err != nil {
-		return nil, status.Errorf(codes.Internal, "Could not prepare beacon block: %v", err)
-	}
-	ok, b, err := vs.V1Alpha1Server.GetAndBuildBlindBlock(ctx, altairBlk)
-	if err != nil {
-		return nil, status.Errorf(codes.Internal, "Could not prepare blind beacon block: %v", err)
-	}
-	if !ok {
-		return nil, status.Error(codes.Unavailable, "Builder is not available due to miss-config or circuit breaker")
+		return nil, status.Error(codes.Unavailable, "Could not get block from prysm API")
 	}
 	blk, err := migration.V1Alpha1BeaconBlockBlindedBellatrixToV2Blinded(b.GetBlindedBellatrix())
 	if err != nil {

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

@@ -689,18 +689,20 @@ func TestProduceBlockV2(t *testing.T) {
 		mockChainService := &mockChain.ChainService{State: beaconState, Root: parentRoot[:]}
 		mockExecutionChain := &mockExecution.Chain{}
 		v1Alpha1Server := &v1alpha1validator.Server{
-			HeadFetcher:       mockChainService,
-			SyncChecker:       &mockSync.Sync{IsSyncing: false},
-			BlockReceiver:     mockChainService,
-			HeadUpdater:       mockChainService,
-			ChainStartFetcher: mockExecutionChain,
-			Eth1InfoFetcher:   mockExecutionChain,
-			Eth1BlockFetcher:  mockExecutionChain,
-			MockEth1Votes:     true,
-			AttPool:           attestations.NewPool(),
-			SlashingsPool:     slashings.NewPool(),
-			ExitPool:          voluntaryexits.NewPool(),
-			StateGen:          stategen.New(db, doublylinkedtree.New()),
+			HeadFetcher:           mockChainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			BlockReceiver:         mockChainService,
+			HeadUpdater:           mockChainService,
+			ChainStartFetcher:     mockExecutionChain,
+			Eth1InfoFetcher:       mockExecutionChain,
+			Eth1BlockFetcher:      mockExecutionChain,
+			MockEth1Votes:         true,
+			AttPool:               attestations.NewPool(),
+			SlashingsPool:         slashings.NewPool(),
+			ExitPool:              voluntaryexits.NewPool(),
+			StateGen:              stategen.New(db, doublylinkedtree.New()),
+			TimeFetcher:           mockChainService,
+			OptimisticModeFetcher: mockChainService,
 		}
 
 		proposerSlashings := make([]*ethpbalpha.ProposerSlashing, params.BeaconConfig().MaxProposerSlashings)
@@ -797,19 +799,21 @@ func TestProduceBlockV2(t *testing.T) {
 		mochChainService := &mockChain.ChainService{State: beaconState, Root: parentRoot[:]}
 		mockExecutionChain := &mockExecution.Chain{}
 		v1Alpha1Server := &v1alpha1validator.Server{
-			HeadFetcher:       mochChainService,
-			SyncChecker:       &mockSync.Sync{IsSyncing: false},
-			BlockReceiver:     mochChainService,
-			HeadUpdater:       mochChainService,
-			ChainStartFetcher: mockExecutionChain,
-			Eth1InfoFetcher:   mockExecutionChain,
-			Eth1BlockFetcher:  mockExecutionChain,
-			MockEth1Votes:     true,
-			AttPool:           attestations.NewPool(),
-			SlashingsPool:     slashings.NewPool(),
-			ExitPool:          voluntaryexits.NewPool(),
-			StateGen:          stategen.New(db, doublylinkedtree.New()),
-			SyncCommitteePool: synccommittee.NewStore(),
+			HeadFetcher:           mochChainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			BlockReceiver:         mochChainService,
+			HeadUpdater:           mochChainService,
+			ChainStartFetcher:     mockExecutionChain,
+			Eth1InfoFetcher:       mockExecutionChain,
+			Eth1BlockFetcher:      mockExecutionChain,
+			MockEth1Votes:         true,
+			AttPool:               attestations.NewPool(),
+			SlashingsPool:         slashings.NewPool(),
+			ExitPool:              voluntaryexits.NewPool(),
+			StateGen:              stategen.New(db, doublylinkedtree.New()),
+			SyncCommitteePool:     synccommittee.NewStore(),
+			TimeFetcher:           mochChainService,
+			OptimisticModeFetcher: mochChainService,
 		}
 
 		proposerSlashings := make([]*ethpbalpha.ProposerSlashing, params.BeaconConfig().MaxProposerSlashings)
@@ -2105,6 +2109,14 @@ func TestProduceBlindedBlock(t *testing.T) {
 		require.NoError(t, err)
 		graffiti := bytesutil.ToBytes32([]byte("eth2"))
 
+		copied := beaconState.Copy()
+		require.NoError(t, copied.SetSlot(params.BeaconConfig().SlotsPerEpoch+1))
+		idx, err := helpers.BeaconProposerIndex(ctx, copied)
+		require.NoError(t, err)
+		require.NoError(t,
+			db.SaveRegistrationsByValidatorIDs(ctx, []types.ValidatorIndex{idx},
+				[]*ethpbalpha.ValidatorRegistrationV1{{FeeRecipient: make([]byte, 20), Pubkey: make([]byte, 48)}}))
+
 		req := &ethpbv1.ProduceBlockRequest{
 			Slot:         params.BeaconConfig().SlotsPerEpoch + 1,
 			RandaoReveal: randaoReveal,

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

@@ -122,6 +122,20 @@ func convertToBlockContainer(blk interfaces.SignedBeaconBlock, root [32]byte, is
 			}
 			ctr.Block = &ethpb.BeaconBlockContainer_BellatrixBlock{BellatrixBlock: rBlk}
 		}
+	case version.Capella:
+		if blk.IsBlinded() {
+			rBlk, err := blk.PbBlindedCapellaBlock()
+			if err != nil {
+				return nil, err
+			}
+			ctr.Block = &ethpb.BeaconBlockContainer_BlindedCapellaBlock{BlindedCapellaBlock: rBlk}
+		} else {
+			rBlk, err := blk.PbCapellaBlock()
+			if err != nil {
+				return nil, err
+			}
+			ctr.Block = &ethpb.BeaconBlockContainer_CapellaBlock{CapellaBlock: rBlk}
+		}
 	default:
 		return nil, errors.Errorf("block type is not recognized: %d", blk.Version())
 	}

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

@@ -541,6 +541,20 @@ func TestServer_ListBeaconBlocks_Genesis(t *testing.T) {
 			Block: &ethpb.BeaconBlockContainer_BlindedBellatrixBlock{BlindedBellatrixBlock: blindedProto}}
 		runListBlocksGenesis(t, wrapped, blkContainer)
 	})
+	t.Run("capella block", func(t *testing.T) {
+		parentRoot := [32]byte{'a'}
+		blk := util.NewBeaconBlockCapella()
+		blk.Block.ParentRoot = parentRoot[:]
+		wrapped, err := blocks.NewSignedBeaconBlock(blk)
+		assert.NoError(t, err)
+		blinded, err := wrapped.ToBlinded()
+		assert.NoError(t, err)
+		blindedProto, err := blinded.PbBlindedCapellaBlock()
+		assert.NoError(t, err)
+		blkContainer := &ethpb.BeaconBlockContainer{
+			Block: &ethpb.BeaconBlockContainer_BlindedCapellaBlock{BlindedCapellaBlock: blindedProto}}
+		runListBlocksGenesis(t, wrapped, blkContainer)
+	})
 }
 
 func runListBlocksGenesis(t *testing.T, blk interfaces.SignedBeaconBlock, blkContainer *ethpb.BeaconBlockContainer) {
@@ -632,6 +646,21 @@ func TestServer_ListBeaconBlocks_Genesis_MultiBlocks(t *testing.T) {
 		assert.NoError(t, err)
 		runListBeaconBlocksGenesisMultiBlocks(t, gBlock, blockCreator)
 	})
+	t.Run("capella block", func(t *testing.T) {
+		parentRoot := [32]byte{1, 2, 3}
+		blk := util.NewBeaconBlockCapella()
+		blk.Block.ParentRoot = parentRoot[:]
+		blockCreator := func(i types.Slot) interfaces.SignedBeaconBlock {
+			b := util.NewBeaconBlockCapella()
+			b.Block.Slot = i
+			wrappedB, err := blocks.NewSignedBeaconBlock(b)
+			assert.NoError(t, err)
+			return wrappedB
+		}
+		gBlock, err := blocks.NewSignedBeaconBlock(blk)
+		assert.NoError(t, err)
+		runListBeaconBlocksGenesisMultiBlocks(t, gBlock, blockCreator)
+	})
 }
 
 func runListBeaconBlocksGenesisMultiBlocks(t *testing.T, genBlock interfaces.SignedBeaconBlock,
@@ -739,6 +768,30 @@ func TestServer_ListBeaconBlocks_Pagination(t *testing.T) {
 		assert.NoError(t, err)
 		runListBeaconBlocksPagination(t, orphanedB, blockCreator, containerCreator)
 	})
+	t.Run("capella block", func(t *testing.T) {
+		blk := util.NewBeaconBlockCapella()
+		blk.Block.Slot = 300
+		blockCreator := func(i types.Slot) interfaces.SignedBeaconBlock {
+			b := util.NewBeaconBlockCapella()
+			b.Block.Slot = i
+			wrappedB, err := blocks.NewSignedBeaconBlock(b)
+			assert.NoError(t, err)
+			return wrappedB
+		}
+		containerCreator := func(i types.Slot, root []byte, canonical bool) *ethpb.BeaconBlockContainer {
+			b := util.NewBeaconBlockCapella()
+			b.Block.Slot = i
+			ctr := &ethpb.BeaconBlockContainer{
+				Block: &ethpb.BeaconBlockContainer_CapellaBlock{
+					CapellaBlock: util.HydrateSignedBeaconBlockCapella(b)},
+				BlockRoot: root,
+				Canonical: canonical}
+			return ctr
+		}
+		orphanedB, err := blocks.NewSignedBeaconBlock(blk)
+		assert.NoError(t, err)
+		runListBeaconBlocksPagination(t, orphanedB, blockCreator, containerCreator)
+	})
 }
 
 func runListBeaconBlocksPagination(t *testing.T, orphanedBlk interfaces.SignedBeaconBlock,
@@ -853,3 +906,23 @@ func runListBeaconBlocksPagination(t *testing.T, orphanedBlk interfaces.SignedBe
 		})
 	}
 }
+
+func TestServer_ConvertToBlockContainer(t *testing.T) {
+	b := util.NewBeaconBlockCapella()
+	root, err := b.HashTreeRoot()
+	require.NoError(t, err)
+	wrapped, err := blocks.NewSignedBeaconBlock(b)
+	assert.NoError(t, err)
+	container, err := convertToBlockContainer(wrapped, root, true)
+	require.NoError(t, err)
+	require.NotNil(t, container.GetCapellaBlock())
+
+	bb := util.NewBlindedBeaconBlockCapella()
+	root, err = b.HashTreeRoot()
+	require.NoError(t, err)
+	wrapped, err = blocks.NewSignedBeaconBlock(bb)
+	assert.NoError(t, err)
+	container, err = convertToBlockContainer(wrapped, root, true)
+	require.NoError(t, err)
+	require.NotNil(t, container.GetBlindedCapellaBlock())
+}

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

@@ -13,10 +13,14 @@ go_library(
         "proposer_altair.go",
         "proposer_attestations.go",
         "proposer_bellatrix.go",
+        "proposer_builder.go",
+        "proposer_capella.go",
         "proposer_deposits.go",
+        "proposer_empty_block.go",
         "proposer_eth1data.go",
         "proposer_execution_payload.go",
-        "proposer_phase0.go",
+        "proposer_exits.go",
+        "proposer_slashings.go",
         "proposer_sync_aggregate.go",
         "server.go",
         "status.go",
@@ -40,12 +44,12 @@ go_library(
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
-        "//beacon-chain/core/transition/interop:go_default_library",
         "//beacon-chain/core/validators:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/db/kv:go_default_library",
         "//beacon-chain/execution:go_default_library",
         "//beacon-chain/operations/attestations:go_default_library",
+        "//beacon-chain/operations/blstoexec:go_default_library",
         "//beacon-chain/operations/slashings:go_default_library",
         "//beacon-chain/operations/synccommittee:go_default_library",
         "//beacon-chain/operations/voluntaryexits:go_default_library",
@@ -58,8 +62,8 @@ go_library(
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/interfaces:go_default_library",
-        "//consensus-types/primitives:go_default_library",
         "//consensus-types/payload-attribute:go_default_library",
+        "//consensus-types/primitives:go_default_library",
         "//container/trie:go_default_library",
         "//contracts/deposit:go_default_library",
         "//crypto/bls:go_default_library",
@@ -121,6 +125,7 @@ common_deps = [
     "//beacon-chain/operations/synccommittee:go_default_library",
     "//beacon-chain/operations/voluntaryexits:go_default_library",
     "//beacon-chain/p2p/testing:go_default_library",
+    "//beacon-chain/rpc/testutil:go_default_library",
     "//beacon-chain/state:go_default_library",
     "//beacon-chain/state/state-native:go_default_library",
     "//beacon-chain/state/stategen:go_default_library",
@@ -170,13 +175,20 @@ go_test(
         "attester_test.go",
         "blocks_test.go",
         "exit_test.go",
+        "proposer_altair_test.go",
         "proposer_attestations_test.go",
         "proposer_bellatrix_test.go",
+        "proposer_builder_test.go",
         "proposer_deposits_test.go",
+        "proposer_empty_block_test.go",
         "proposer_execution_payload_test.go",
+        "proposer_exits_test.go",
+        "proposer_slashings_test.go",
         "proposer_sync_aggregate_test.go",
         "proposer_test.go",
+        "server_mainnet_test.go",
         "server_test.go",
+        "status_mainnet_test.go",
         "status_test.go",
         "sync_committee_test.go",
         "validator_test.go",

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

@@ -89,6 +89,17 @@ func sendVerifiedBlocks(stream ethpb.BeaconNodeValidator_StreamBlocksAltairServe
 			return nil
 		}
 		b.Block = &ethpb.StreamBlocksResponse_BellatrixBlock{BellatrixBlock: phBlk}
+	case version.Capella:
+		pb, err := data.SignedBlock.Proto()
+		if err != nil {
+			return errors.Wrap(err, "could not get protobuf block")
+		}
+		phBlk, ok := pb.(*ethpb.SignedBeaconBlockCapella)
+		if !ok {
+			log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlockCapella")
+			return nil
+		}
+		b.Block = &ethpb.StreamBlocksResponse_CapellaBlock{CapellaBlock: phBlk}
 	}
 
 	if err := stream.Send(b); err != nil {
@@ -136,6 +147,8 @@ func (vs *Server) sendBlocks(stream ethpb.BeaconNodeValidator_StreamBlocksAltair
 		b.Block = &ethpb.StreamBlocksResponse_AltairBlock{AltairBlock: p}
 	case *ethpb.SignedBeaconBlockBellatrix:
 		b.Block = &ethpb.StreamBlocksResponse_BellatrixBlock{BellatrixBlock: p}
+	case *ethpb.SignedBeaconBlockCapella:
+		b.Block = &ethpb.StreamBlocksResponse_CapellaBlock{CapellaBlock: p}
 	default:
 		log.Errorf("Unknown block type %T", p)
 	}

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

@@ -112,6 +112,48 @@ func TestServer_StreamAltairBlocks_OnHeadUpdated(t *testing.T) {
 	<-exitRoutine
 }
 
+func TestServer_StreamCapellaBlocks_OnHeadUpdated(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	params.OverrideBeaconConfig(params.BeaconConfig())
+	ctx := context.Background()
+	beaconState, privs := util.DeterministicGenesisStateCapella(t, 64)
+	c, err := altair.NextSyncCommittee(ctx, beaconState)
+	require.NoError(t, err)
+	require.NoError(t, beaconState.SetCurrentSyncCommittee(c))
+
+	b, err := util.GenerateFullBlockCapella(beaconState, privs, util.DefaultBlockGenConfig(), 1)
+	require.NoError(t, err)
+	chainService := &chainMock.ChainService{State: beaconState}
+	server := &Server{
+		Ctx:           ctx,
+		BlockNotifier: chainService.BlockNotifier(),
+		HeadFetcher:   chainService,
+	}
+	exitRoutine := make(chan bool)
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	mockStream := mock.NewMockBeaconNodeValidatorAltair_StreamBlocksServer(ctrl)
+
+	mockStream.EXPECT().Send(&ethpb.StreamBlocksResponse{Block: &ethpb.StreamBlocksResponse_CapellaBlock{CapellaBlock: b}}).Do(func(arg0 interface{}) {
+		exitRoutine <- true
+	})
+	mockStream.EXPECT().Context().Return(ctx).AnyTimes()
+
+	go func(tt *testing.T) {
+		assert.NoError(tt, server.StreamBlocksAltair(&ethpb.StreamBlocksRequest{}, mockStream), "Could not call RPC method")
+	}(t)
+	wrappedBlk, err := blocks.NewSignedBeaconBlock(b)
+	require.NoError(t, err)
+	// Send in a loop to ensure it is delivered (busy wait for the service to subscribe to the state feed).
+	for sent := 0; sent == 0; {
+		sent = server.BlockNotifier.BlockFeed().Send(&feed.Event{
+			Type: blockfeed.ReceivedBlock,
+			Data: &blockfeed.ReceivedBlockData{SignedBlock: wrappedBlk},
+		})
+	}
+	<-exitRoutine
+}
+
 func TestServer_StreamAltairBlocksVerified_OnHeadUpdated(t *testing.T) {
 	db := dbTest.SetupDB(t)
 	ctx := context.Background()
@@ -154,3 +196,46 @@ func TestServer_StreamAltairBlocksVerified_OnHeadUpdated(t *testing.T) {
 	}
 	<-exitRoutine
 }
+
+func TestServer_StreamCapellaBlocksVerified_OnHeadUpdated(t *testing.T) {
+	db := dbTest.SetupDB(t)
+	ctx := context.Background()
+	beaconState, privs := util.DeterministicGenesisStateCapella(t, 32)
+	c, err := altair.NextSyncCommittee(ctx, beaconState)
+	require.NoError(t, err)
+	require.NoError(t, beaconState.SetCurrentSyncCommittee(c))
+
+	b, err := util.GenerateFullBlockCapella(beaconState, privs, util.DefaultBlockGenConfig(), 1)
+	require.NoError(t, err)
+	r, err := b.Block.HashTreeRoot()
+	require.NoError(t, err)
+	wrappedBlk := util.SaveBlock(t, ctx, db, b)
+	chainService := &chainMock.ChainService{State: beaconState}
+	server := &Server{
+		Ctx:           ctx,
+		StateNotifier: chainService.StateNotifier(),
+		HeadFetcher:   chainService,
+	}
+	exitRoutine := make(chan bool)
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	mockStream := mock.NewMockBeaconNodeValidatorAltair_StreamBlocksServer(ctrl)
+	mockStream.EXPECT().Send(&ethpb.StreamBlocksResponse{Block: &ethpb.StreamBlocksResponse_CapellaBlock{CapellaBlock: b}}).Do(func(arg0 interface{}) {
+		exitRoutine <- true
+	})
+	mockStream.EXPECT().Context().Return(ctx).AnyTimes()
+
+	go func(tt *testing.T) {
+		assert.NoError(tt, server.StreamBlocksAltair(&ethpb.StreamBlocksRequest{
+			VerifiedOnly: true,
+		}, mockStream), "Could not call RPC method")
+	}(t)
+	// Send in a loop to ensure it is delivered (busy wait for the service to subscribe to the state feed).
+	for sent := 0; sent == 0; {
+		sent = server.StateNotifier.StateFeed().Send(&feed.Event{
+			Type: statefeed.BlockProcessed,
+			Data: &statefeed.BlockProcessedData{Slot: b.Block.Slot, BlockRoot: r, SignedBlock: wrappedBlk},
+		})
+	}
+	<-exitRoutine
+}

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

@@ -14,6 +14,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/builder"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
 	blockfeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/block"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/kv"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
@@ -41,26 +42,110 @@ func (vs *Server) GetBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (
 	ctx, span := trace.StartSpan(ctx, "ProposerServer.GetBeaconBlock")
 	defer span.End()
 	span.AddAttributes(trace.Int64Attribute("slot", int64(req.Slot)))
-	if slots.ToEpoch(req.Slot) < params.BeaconConfig().AltairForkEpoch {
-		blk, err := vs.getPhase0BeaconBlock(ctx, req)
-		if err != nil {
-			return nil, status.Errorf(codes.Internal, "Could not fetch phase0 beacon block: %v", err)
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Phase0{Phase0: blk}}, nil
-	} else if slots.ToEpoch(req.Slot) < params.BeaconConfig().BellatrixForkEpoch {
-		blk, err := vs.getAltairBeaconBlock(ctx, req)
-		if err != nil {
-			return nil, status.Errorf(codes.Internal, "Could not fetch Altair beacon block: %v", err)
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Altair{Altair: blk}}, nil
+
+	// A syncing validator should not produce a block.
+	if vs.SyncChecker.Syncing() {
+		return nil, status.Error(codes.Unavailable, "Syncing to latest head, not ready to respond")
 	}
 
 	// An optimistic validator MUST NOT produce a block (i.e., sign across the DOMAIN_BEACON_PROPOSER domain).
-	if err := vs.optimisticStatus(ctx); err != nil {
-		return nil, err
+	if slots.ToEpoch(req.Slot) >= params.BeaconConfig().BellatrixForkEpoch {
+		if err := vs.optimisticStatus(ctx); err != nil {
+			return nil, status.Errorf(codes.Unavailable, "Validator is not ready to propose: %v", err)
+		}
 	}
 
-	return vs.getBellatrixBeaconBlock(ctx, req)
+	sBlk, err := getEmptyBlock(req.Slot)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "Could not prepare block: %v", err)
+	}
+	parentRoot, err := vs.HeadFetcher.HeadRoot(ctx)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "Could not get head root: %v", err)
+	}
+	head, err := vs.HeadFetcher.HeadState(ctx)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "Could not get head state: %v", err)
+	}
+	head, err = transition.ProcessSlotsUsingNextSlotCache(ctx, head, parentRoot, req.Slot)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "Could not process slots up to %d: %v", req.Slot, err)
+	}
+
+	blk := sBlk.Block()
+	// Set slot, graffiti, randao reveal, and parent root.
+	blk.SetSlot(req.Slot)
+	blk.Body().SetGraffiti(req.Graffiti)
+	blk.Body().SetRandaoReveal(req.RandaoReveal)
+	blk.SetParentRoot(parentRoot)
+
+	// Set eth1 data.
+	eth1Data, err := vs.eth1DataMajorityVote(ctx, head)
+	if err != nil {
+		eth1Data = &ethpb.Eth1Data{DepositRoot: params.BeaconConfig().ZeroHash[:], BlockHash: params.BeaconConfig().ZeroHash[:]}
+		log.WithError(err).Error("Could not get eth1data")
+	}
+	blk.Body().SetEth1Data(eth1Data)
+
+	// Set deposit and attestation.
+	deposits, atts, err := vs.packDepositsAndAttestations(ctx, head, eth1Data) // TODO: split attestations and deposits
+	if err != nil {
+		blk.Body().SetDeposits([]*ethpb.Deposit{})
+		blk.Body().SetAttestations([]*ethpb.Attestation{})
+		log.WithError(err).Error("Could not pack deposits and attestations")
+	}
+	blk.Body().SetDeposits(deposits)
+	blk.Body().SetAttestations(atts)
+
+	// Set proposer index.
+	idx, err := helpers.BeaconProposerIndex(ctx, head)
+	if err != nil {
+		return nil, fmt.Errorf("could not calculate proposer index %v", err)
+	}
+	blk.SetProposerIndex(idx)
+
+	// Set slashings.
+	validProposerSlashings, validAttSlashings := vs.getSlashings(ctx, head)
+	blk.Body().SetProposerSlashings(validProposerSlashings)
+	blk.Body().SetAttesterSlashings(validAttSlashings)
+
+	// Set exits.
+	blk.Body().SetVoluntaryExits(vs.getExits(head, req.Slot))
+
+	// Set sync aggregate. New in Altair.
+	vs.setSyncAggregate(ctx, blk)
+
+	// Set execution data. New in Bellatrix.
+	if err := vs.setExecutionData(ctx, blk, head); err != nil {
+		return nil, status.Errorf(codes.Internal, "Could not set execution data: %v", err)
+	}
+
+	// Set bls to execution change. New in Capella.
+	vs.setBlsToExecData(blk, head)
+
+	sr, err := vs.computeStateRoot(ctx, sBlk)
+	if err != nil {
+		sr = []byte{'e', 'v', 'i', 'l'}
+	}
+	blk.SetStateRoot(sr)
+
+	pb, err := blk.Proto()
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "Could not convert block to proto: %v", err)
+	}
+	if slots.ToEpoch(req.Slot) >= params.BeaconConfig().CapellaForkEpoch {
+		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Capella{Capella: pb.(*ethpb.BeaconBlockCapella)}}, nil
+	}
+	if slots.ToEpoch(req.Slot) >= params.BeaconConfig().BellatrixForkEpoch && !blk.IsBlinded() {
+		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Bellatrix{Bellatrix: pb.(*ethpb.BeaconBlockBellatrix)}}, nil
+	}
+	if slots.ToEpoch(req.Slot) >= params.BeaconConfig().BellatrixForkEpoch && blk.IsBlinded() {
+		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedBellatrix{BlindedBellatrix: pb.(*ethpb.BlindedBeaconBlockBellatrix)}}, nil
+	}
+	if slots.ToEpoch(req.Slot) >= params.BeaconConfig().AltairForkEpoch {
+		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Altair{Altair: pb.(*ethpb.BeaconBlockAltair)}}, nil
+	}
+	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Phase0{Phase0: pb.(*ethpb.BeaconBlock)}}, nil
 }
 
 // ProposeBeaconBlock is called by a proposer during its assigned slot to create a block in an attempt

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

@@ -2,77 +2,42 @@ package validator
 
 import (
 	"context"
-	"fmt"
 
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition/interop"
+	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/crypto/bls"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
 	synccontribution "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1/attestation/aggregation/sync_contribution"
+	"github.com/prysmaticlabs/prysm/v3/runtime/version"
 	"go.opencensus.io/trace"
 )
 
-func (vs *Server) BuildAltairBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (*ethpb.BeaconBlockAltair, error) {
-	ctx, span := trace.StartSpan(ctx, "ProposerServer.BuildAltairBeaconBlock")
-	defer span.End()
-	blkData, err := vs.buildPhase0BlockData(ctx, req)
-	if err != nil {
-		return nil, fmt.Errorf("could not build block data: %v", err)
+func (vs *Server) setSyncAggregate(ctx context.Context, blk interfaces.BeaconBlock) {
+	if blk.Version() < version.Altair {
+		return
 	}
 
-	// Use zero hash as stub for state root to compute later.
-	stateRoot := params.BeaconConfig().ZeroHash[:]
-
-	// No need for safe sub as req.Slot cannot be 0 if requesting Altair blocks. If 0, we will be throwing
-	// an error in the first validity check of this endpoint.
-	syncAggregate, err := vs.getSyncAggregate(ctx, req.Slot-1, bytesutil.ToBytes32(blkData.ParentRoot))
+	syncAggregate, err := vs.getSyncAggregate(ctx, blk.Slot()-1, blk.ParentRoot())
 	if err != nil {
-		return nil, err
+		log.WithError(err).Error("Could not get sync aggregate")
+		emptySig := [96]byte{0xC0}
+		emptyAggregate := &ethpb.SyncAggregate{
+			SyncCommitteeBits:      make([]byte, params.BeaconConfig().SyncCommitteeSize),
+			SyncCommitteeSignature: emptySig[:],
+		}
+		if err := blk.Body().SetSyncAggregate(emptyAggregate); err != nil {
+			log.WithError(err).Error("Could not set sync aggregate")
+		}
+		return
 	}
 
-	return &ethpb.BeaconBlockAltair{
-		Slot:          req.Slot,
-		ParentRoot:    blkData.ParentRoot,
-		StateRoot:     stateRoot,
-		ProposerIndex: blkData.ProposerIdx,
-		Body: &ethpb.BeaconBlockBodyAltair{
-			Eth1Data:          blkData.Eth1Data,
-			Deposits:          blkData.Deposits,
-			Attestations:      blkData.Attestations,
-			RandaoReveal:      req.RandaoReveal,
-			ProposerSlashings: blkData.ProposerSlashings,
-			AttesterSlashings: blkData.AttesterSlashings,
-			VoluntaryExits:    blkData.VoluntaryExits,
-			Graffiti:          blkData.Graffiti[:],
-			SyncAggregate:     syncAggregate,
-		},
-	}, nil
-}
-
-func (vs *Server) getAltairBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (*ethpb.BeaconBlockAltair, error) {
-	ctx, span := trace.StartSpan(ctx, "ProposerServer.getAltairBeaconBlock")
-	defer span.End()
-	blk, err := vs.BuildAltairBeaconBlock(ctx, req)
-	if err != nil {
-		return nil, fmt.Errorf("could not build block data: %v", err)
+	// Can not error. We already filter block versioning at the top. Phase 0 is impossible.
+	if err := blk.Body().SetSyncAggregate(syncAggregate); err != nil {
+		log.WithError(err).Error("Could not set sync aggregate")
 	}
-	// Compute state root with the newly constructed block.
-	wsb, err := blocks.NewSignedBeaconBlock(
-		&ethpb.SignedBeaconBlockAltair{Block: blk, Signature: make([]byte, 96)},
-	)
-	if err != nil {
-		return nil, err
-	}
-	stateRoot, err := vs.computeStateRoot(ctx, wsb)
-	if err != nil {
-		interop.WriteBlockToDisk(wsb, true /*failed*/)
-		return nil, fmt.Errorf("could not compute state root: %v", err)
-	}
-	blk.StateRoot = stateRoot
-	return blk, nil
 }
 
 // getSyncAggregate retrieves the sync contributions from the pool to construct the sync aggregate object.
@@ -81,6 +46,9 @@ func (vs *Server) getSyncAggregate(ctx context.Context, slot types.Slot, root [3
 	ctx, span := trace.StartSpan(ctx, "ProposerServer.getSyncAggregate")
 	defer span.End()
 
+	if vs.SyncCommitteePool == nil {
+		return nil, errors.New("sync committee pool is nil")
+	}
 	// Contributions have to match the input root
 	contributions, err := vs.SyncCommitteePool.SyncCommitteeContributions(slot)
 	if err != nil {

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

@@ -0,0 +1,28 @@
+package validator
+
+import (
+	"context"
+	"testing"
+
+	"github.com/prysmaticlabs/prysm/v3/config/params"
+	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
+	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v3/testing/util"
+)
+
+func TestServer_SetSyncAggregate_EmptyCase(t *testing.T) {
+	b, err := blocks.NewBeaconBlock(util.NewBeaconBlockAltair().Block)
+	require.NoError(t, err)
+	s := &Server{} // Sever is not initialized with sync committee pool.
+	s.setSyncAggregate(context.Background(), b)
+	agg, err := b.Body().SyncAggregate()
+	require.NoError(t, err)
+
+	emptySig := [96]byte{0xC0}
+	want := &ethpb.SyncAggregate{
+		SyncCommitteeBits:      make([]byte, params.BeaconConfig().SyncCommitteeSize),
+		SyncCommitteeSignature: emptySig[:],
+	}
+	require.DeepEqual(t, want, agg)
+}

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

@@ -85,10 +85,9 @@ func (a proposerAtts) filter(ctx context.Context, st state.BeaconState) (propose
 	invalidAtts := make([]*ethpb.Attestation, 0, len(a))
 	var attestationProcessor func(context.Context, state.BeaconState, *ethpb.Attestation) (state.BeaconState, error)
 
-	switch st.Version() {
-	case version.Phase0:
+	if st.Version() == version.Phase0 {
 		attestationProcessor = blocks.ProcessAttestationNoVerifySignature
-	case version.Altair, version.Bellatrix:
+	} else if st.Version() >= version.Altair {
 		// Use a wrapper here, as go needs strong typing for the function signature.
 		attestationProcessor = func(ctx context.Context, st state.BeaconState, attestation *ethpb.Attestation) (state.BeaconState, error) {
 			totalBalance, err := helpers.TotalActiveBalance(st)
@@ -97,10 +96,11 @@ func (a proposerAtts) filter(ctx context.Context, st state.BeaconState) (propose
 			}
 			return altair.ProcessAttestationNoVerifySignature(ctx, st, attestation, totalBalance)
 		}
-	default:
+	} else {
 		// Exit early if there is an unknown state type.
 		return validAtts, invalidAtts
 	}
+
 	for _, att := range a {
 		if _, err := attestationProcessor(ctx, st, att); err == nil {
 			validAtts = append(validAtts, att)

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

@@ -11,8 +11,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition/interop"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/kv"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
@@ -36,73 +35,41 @@ var builderGetPayloadMissCount = promauto.NewCounter(prometheus.CounterOpts{
 // block request. This value is known as `BUILDER_PROPOSAL_DELAY_TOLERANCE` in builder spec.
 const blockBuilderTimeout = 1 * time.Second
 
-func (vs *Server) getBellatrixBeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (*ethpb.GenericBeaconBlock, error) {
-	altairBlk, err := vs.BuildAltairBeaconBlock(ctx, req)
-	if err != nil {
-		return nil, err
+// Sets the execution data for the block. Execution data can come from local EL client or remote builder depends on validator registration and circuit breaker conditions.
+func (vs *Server) setExecutionData(ctx context.Context, blk interfaces.BeaconBlock, headState state.BeaconState) error {
+	idx := blk.ProposerIndex()
+	slot := blk.Slot()
+	if slots.ToEpoch(slot) < params.BeaconConfig().BellatrixForkEpoch {
+		return nil
 	}
 
-	if !req.SkipMevBoost {
-		registered, err := vs.validatorRegistered(ctx, altairBlk.ProposerIndex)
-		if registered && err == nil {
-			builderReady, b, err := vs.GetAndBuildBlindBlock(ctx, altairBlk)
-			if err != nil {
-				// In the event of an error, the node should fall back to default execution engine for building block.
-				log.WithError(err).Error("Failed to build a block from external builder, falling " +
-					"back to local execution client")
-				builderGetPayloadMissCount.Inc()
-			} else if builderReady {
-				return b, nil
+	canUseBuilder, err := vs.canUseBuilder(ctx, slot, idx)
+	if err != nil {
+		log.WithError(err).Warn("Proposer: failed to check if builder can be used")
+	} else if canUseBuilder {
+		h, err := vs.getPayloadHeaderFromBuilder(ctx, slot, idx)
+		if err != nil {
+			builderGetPayloadMissCount.Inc()
+			log.WithError(err).Warn("Proposer: failed to get payload header from builder")
+		} else {
+			blk.SetBlinded(true)
+			if err := blk.Body().SetExecution(h); err != nil {
+				log.WithError(err).Warn("Proposer: failed to set execution payload")
+			} else {
+				return nil
 			}
-		} else if err != nil {
-			log.WithError(err).WithFields(logrus.Fields{
-				"slot":           req.Slot,
-				"validatorIndex": altairBlk.ProposerIndex,
-			}).Error("Could not determine validator has registered. Defaulting to local execution client")
 		}
 	}
-	payload, err := vs.getExecutionPayload(ctx, req.Slot, altairBlk.ProposerIndex, bytesutil.ToBytes32(altairBlk.ParentRoot))
+	executionData, err := vs.getExecutionPayload(ctx, slot, idx, blk.ParentRoot(), headState)
 	if err != nil {
-		return nil, err
+		return errors.Wrap(err, "failed to get execution payload")
 	}
-
-	blk := &ethpb.BeaconBlockBellatrix{
-		Slot:          altairBlk.Slot,
-		ProposerIndex: altairBlk.ProposerIndex,
-		ParentRoot:    altairBlk.ParentRoot,
-		StateRoot:     params.BeaconConfig().ZeroHash[:],
-		Body: &ethpb.BeaconBlockBodyBellatrix{
-			RandaoReveal:      altairBlk.Body.RandaoReveal,
-			Eth1Data:          altairBlk.Body.Eth1Data,
-			Graffiti:          altairBlk.Body.Graffiti,
-			ProposerSlashings: altairBlk.Body.ProposerSlashings,
-			AttesterSlashings: altairBlk.Body.AttesterSlashings,
-			Attestations:      altairBlk.Body.Attestations,
-			Deposits:          altairBlk.Body.Deposits,
-			VoluntaryExits:    altairBlk.Body.VoluntaryExits,
-			SyncAggregate:     altairBlk.Body.SyncAggregate,
-			ExecutionPayload:  payload,
-		},
-	}
-	// Compute state root with the newly constructed block.
-	wsb, err := consensusblocks.NewSignedBeaconBlock(
-		&ethpb.SignedBeaconBlockBellatrix{Block: blk, Signature: make([]byte, 96)},
-	)
-	if err != nil {
-		return nil, err
-	}
-	stateRoot, err := vs.computeStateRoot(ctx, wsb)
-	if err != nil {
-		interop.WriteBlockToDisk(wsb, true /*failed*/)
-		return nil, fmt.Errorf("could not compute state root: %v", err)
-	}
-	blk.StateRoot = stateRoot
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Bellatrix{Bellatrix: blk}}, nil
+	return blk.Body().SetExecution(executionData)
 }
 
 // This function retrieves the payload header given the slot number and the validator index.
 // It's a no-op if the latest head block is not versioned bellatrix.
-func (vs *Server) getPayloadHeaderFromBuilder(ctx context.Context, slot types.Slot, idx types.ValidatorIndex) (*enginev1.ExecutionPayloadHeader, error) {
+func (vs *Server) getPayloadHeaderFromBuilder(ctx context.Context, slot types.Slot, idx types.ValidatorIndex) (interfaces.ExecutionData, error) {
 	b, err := vs.HeadFetcher.HeadBlock(ctx)
 	if err != nil {
 		return nil, err
@@ -119,6 +86,10 @@ func (vs *Server) getPayloadHeaderFromBuilder(ctx context.Context, slot types.Sl
 	if err != nil {
 		return nil, err
 	}
+
+	ctx, cancel := context.WithTimeout(ctx, blockBuilderTimeout)
+	defer cancel()
+
 	bid, err := vs.BlockBuilder.GetHeader(ctx, slot, bytesutil.ToBytes32(h.BlockHash()), pk)
 	if err != nil {
 		return nil, err
@@ -162,48 +133,7 @@ func (vs *Server) getPayloadHeaderFromBuilder(ctx context.Context, slot types.Sl
 		"builderPubKey": fmt.Sprintf("%#x", bid.Message.Pubkey),
 		"blockHash":     fmt.Sprintf("%#x", bid.Message.Header.BlockHash),
 	}).Info("Received header with bid")
-	return bid.Message.Header, nil
-}
-
-// This function constructs the builder block given the input altair block and the header. It returns a generic beacon block for signing
-func (vs *Server) buildBlindBlock(ctx context.Context, b *ethpb.BeaconBlockAltair, h *enginev1.ExecutionPayloadHeader) (*ethpb.GenericBeaconBlock, error) {
-	if b == nil || b.Body == nil {
-		return nil, errors.New("nil block")
-	}
-	if h == nil {
-		return nil, errors.New("nil header")
-	}
-
-	blk := &ethpb.BlindedBeaconBlockBellatrix{
-		Slot:          b.Slot,
-		ProposerIndex: b.ProposerIndex,
-		ParentRoot:    b.ParentRoot,
-		StateRoot:     params.BeaconConfig().ZeroHash[:],
-		Body: &ethpb.BlindedBeaconBlockBodyBellatrix{
-			RandaoReveal:           b.Body.RandaoReveal,
-			Eth1Data:               b.Body.Eth1Data,
-			Graffiti:               b.Body.Graffiti,
-			ProposerSlashings:      b.Body.ProposerSlashings,
-			AttesterSlashings:      b.Body.AttesterSlashings,
-			Attestations:           b.Body.Attestations,
-			Deposits:               b.Body.Deposits,
-			VoluntaryExits:         b.Body.VoluntaryExits,
-			SyncAggregate:          b.Body.SyncAggregate,
-			ExecutionPayloadHeader: h,
-		},
-	}
-	wsb, err := consensusblocks.NewSignedBeaconBlock(
-		&ethpb.SignedBlindedBeaconBlockBellatrix{Block: blk, Signature: make([]byte, 96)},
-	)
-	if err != nil {
-		return nil, err
-	}
-	stateRoot, err := vs.computeStateRoot(ctx, wsb)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not compute state root")
-	}
-	blk.StateRoot = stateRoot
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedBellatrix{BlindedBellatrix: blk}}, nil
+	return consensusblocks.WrappedExecutionPayloadHeader(bid.Message.Header)
 }
 
 // This function retrieves the full payload block using the input blind block. This input must be versioned as
@@ -317,131 +247,6 @@ func (vs *Server) unblindBuilderBlock(ctx context.Context, b interfaces.SignedBe
 	return wb, nil
 }
 
-// readyForBuilder returns true if builder is allowed to be used. Builder is only allowed to be use after the
-// first finalized checkpt has been execution-enabled.
-func (vs *Server) readyForBuilder(ctx context.Context) (bool, error) {
-	cp := vs.FinalizationFetcher.FinalizedCheckpt()
-	// Checkpoint root is zero means we are still at genesis epoch.
-	if bytesutil.ToBytes32(cp.Root) == params.BeaconConfig().ZeroHash {
-		return false, nil
-	}
-	b, err := vs.BeaconDB.Block(ctx, bytesutil.ToBytes32(cp.Root))
-	if err != nil {
-		return false, err
-	}
-	if err = consensusblocks.BeaconBlockIsNil(b); err != nil {
-		return false, err
-	}
-	return blocks.IsExecutionBlock(b.Block().Body())
-}
-
-// circuitBreakBuilder returns true if the builder is not allowed to be used due to circuit breaker conditions.
-func (vs *Server) circuitBreakBuilder(s types.Slot) (bool, error) {
-	if vs.ForkFetcher == nil || vs.ForkFetcher.ForkChoicer() == nil {
-		return true, errors.New("no fork choicer configured")
-	}
-
-	// Circuit breaker is active if the missing consecutive slots greater than `MaxBuilderConsecutiveMissedSlots`.
-	highestReceivedSlot := vs.ForkFetcher.ForkChoicer().HighestReceivedBlockSlot()
-	maxConsecutiveSkipSlotsAllowed := params.BeaconConfig().MaxBuilderConsecutiveMissedSlots
-	diff, err := s.SafeSubSlot(highestReceivedSlot)
-	if err != nil {
-		return true, err
-	}
-	if diff > maxConsecutiveSkipSlotsAllowed {
-		log.WithFields(logrus.Fields{
-			"currentSlot":                    s,
-			"highestReceivedSlot":            highestReceivedSlot,
-			"maxConsecutiveSkipSlotsAllowed": maxConsecutiveSkipSlotsAllowed,
-		}).Warn("Builder circuit breaker activated due to missing consecutive slot")
-		return true, nil
-	}
-
-	// Not much reason to check missed slots epoch rolling window if input slot is less than epoch.
-	if s < params.BeaconConfig().SlotsPerEpoch {
-		return false, nil
-	}
-
-	// Circuit breaker is active if the missing slots per epoch (rolling window) greater than `MaxBuilderEpochMissedSlots`.
-	receivedCount, err := vs.ForkFetcher.ForkChoicer().ReceivedBlocksLastEpoch()
-	if err != nil {
-		return true, err
-	}
-	maxEpochSkipSlotsAllowed := params.BeaconConfig().MaxBuilderEpochMissedSlots
-	diff, err = params.BeaconConfig().SlotsPerEpoch.SafeSub(receivedCount)
-	if err != nil {
-		return true, err
-	}
-	if diff > maxEpochSkipSlotsAllowed {
-		log.WithFields(logrus.Fields{
-			"totalMissed":              diff,
-			"maxEpochSkipSlotsAllowed": maxEpochSkipSlotsAllowed,
-		}).Warn("Builder circuit breaker activated due to missing enough slots last epoch")
-		return true, nil
-	}
-
-	return false, nil
-}
-
-// GetAndBuildBlindBlock builds blind block from builder network. Returns a boolean status, built block and error.
-// If the status is false that means builder the header block is disallowed.
-// This routine is time limited by `blockBuilderTimeout`.
-func (vs *Server) GetAndBuildBlindBlock(ctx context.Context, b *ethpb.BeaconBlockAltair) (bool, *ethpb.GenericBeaconBlock, error) {
-	// No op. Builder is not defined. User did not specify a user URL. We should use local EE.
-	if vs.BlockBuilder == nil || !vs.BlockBuilder.Configured() {
-		return false, nil, nil
-	}
-	ctx, cancel := context.WithTimeout(ctx, blockBuilderTimeout)
-	defer cancel()
-	// Does the protocol allow for builder at this current moment. Builder is only allowed post merge after finalization.
-	ready, err := vs.readyForBuilder(ctx)
-	if err != nil {
-		return false, nil, errors.Wrap(err, "could not determine if builder is ready")
-	}
-	if !ready {
-		return false, nil, nil
-	}
-
-	circuitBreak, err := vs.circuitBreakBuilder(b.Slot)
-	if err != nil {
-		return false, nil, errors.Wrap(err, "could not determine if builder circuit breaker condition")
-	}
-	if circuitBreak {
-		return false, nil, nil
-	}
-
-	h, err := vs.getPayloadHeaderFromBuilder(ctx, b.Slot, b.ProposerIndex)
-	if err != nil {
-		return false, nil, errors.Wrap(err, "could not get payload header")
-	}
-	log.WithFields(logrus.Fields{
-		"blockHash":    fmt.Sprintf("%#x", h.BlockHash),
-		"feeRecipient": fmt.Sprintf("%#x", h.FeeRecipient),
-		"gasUsed":      h.GasUsed,
-		"slot":         b.Slot,
-	}).Info("Retrieved header from builder")
-	gb, err := vs.buildBlindBlock(ctx, b, h)
-	if err != nil {
-		return false, nil, errors.Wrap(err, "could not combine altair block with payload header")
-	}
-	return true, gb, nil
-}
-
-// validatorRegistered returns true if validator with index `id` was previously registered in the database.
-func (vs *Server) validatorRegistered(ctx context.Context, id types.ValidatorIndex) (bool, error) {
-	if vs.BeaconDB == nil {
-		return false, errors.New("nil beacon db")
-	}
-	_, err := vs.BeaconDB.RegistrationByValidatorID(ctx, id)
-	switch {
-	case errors.Is(err, kv.ErrNotFoundFeeRecipient):
-		return false, nil
-	case err != nil:
-		return false, err
-	}
-	return true, nil
-}
-
 // Validates builder signature and returns an error if the signature is invalid.
 func validateBuilderSignature(bid *ethpb.SignedBuilderBid) error {
 	d, err := signing.ComputeDomain(params.BeaconConfig().DomainApplicationBuilder,

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

@@ -5,32 +5,14 @@ import (
 	"testing"
 	"time"
 
-	"github.com/ethereum/go-ethereum/common"
 	"github.com/pkg/errors"
 	blockchainTest "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
 	builderTest "github.com/prysmaticlabs/prysm/v3/beacon-chain/builder/testing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/altair"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
-	prysmtime "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
-	dbTest "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	mockExecution "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/slashings"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/synccommittee"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	mockSync "github.com/prysmaticlabs/prysm/v3/beacon-chain/sync/initial-sync/testing"
 	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/crypto/bls"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v3/encoding/ssz"
@@ -39,59 +21,8 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/testing/require"
 	"github.com/prysmaticlabs/prysm/v3/testing/util"
 	"github.com/prysmaticlabs/prysm/v3/time/slots"
-	logTest "github.com/sirupsen/logrus/hooks/test"
 )
 
-func TestServer_buildHeaderBlock(t *testing.T) {
-	db := dbTest.SetupDB(t)
-	ctx := context.Background()
-
-	beaconState, keys := util.DeterministicGenesisStateAltair(t, 16384)
-	sCom, err := altair.NextSyncCommittee(context.Background(), beaconState)
-	require.NoError(t, err)
-	require.NoError(t, beaconState.SetCurrentSyncCommittee(sCom))
-	copiedState := beaconState.Copy()
-
-	proposerServer := &Server{
-		BeaconDB: db,
-		StateGen: stategen.New(db, doublylinkedtree.New()),
-	}
-	b, err := util.GenerateFullBlockAltair(copiedState, keys, util.DefaultBlockGenConfig(), 1)
-	require.NoError(t, err)
-	r := bytesutil.ToBytes32(b.Block.ParentRoot)
-	util.SaveBlock(t, ctx, proposerServer.BeaconDB, b)
-	require.NoError(t, proposerServer.BeaconDB.SaveState(ctx, beaconState, r))
-
-	b1, err := util.GenerateFullBlockAltair(copiedState, keys, util.DefaultBlockGenConfig(), 2)
-	require.NoError(t, err)
-
-	vs := &Server{StateGen: stategen.New(db, doublylinkedtree.New()), BeaconDB: db}
-	h := &v1.ExecutionPayloadHeader{
-		BlockNumber:      123,
-		GasLimit:         456,
-		GasUsed:          789,
-		ParentHash:       make([]byte, fieldparams.RootLength),
-		FeeRecipient:     make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:        make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:     make([]byte, fieldparams.RootLength),
-		LogsBloom:        make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:       make([]byte, fieldparams.RootLength),
-		BaseFeePerGas:    make([]byte, fieldparams.RootLength),
-		BlockHash:        make([]byte, fieldparams.RootLength),
-		TransactionsRoot: make([]byte, fieldparams.RootLength),
-		ExtraData:        make([]byte, 0),
-	}
-	got, err := vs.buildBlindBlock(ctx, b1.Block, h)
-	require.NoError(t, err)
-	require.DeepEqual(t, h, got.GetBlindedBellatrix().Body.ExecutionPayloadHeader)
-
-	_, err = vs.buildBlindBlock(ctx, nil, h)
-	require.ErrorContains(t, "nil block", err)
-
-	_, err = vs.buildBlindBlock(ctx, b1.Block, nil)
-	require.ErrorContains(t, "nil header", err)
-}
-
 func TestServer_getPayloadHeader(t *testing.T) {
 	emptyRoot, err := ssz.TransactionsRoot([][]byte{})
 	require.NoError(t, err)
@@ -227,7 +158,11 @@ func TestServer_getPayloadHeader(t *testing.T) {
 				require.ErrorContains(t, tc.err, err)
 			} else {
 				require.NoError(t, err)
-				require.DeepEqual(t, tc.returnedHeader, h)
+				if tc.returnedHeader != nil {
+					want, err := blocks.WrappedExecutionPayloadHeader(tc.returnedHeader)
+					require.NoError(t, err)
+					require.DeepEqual(t, want, h)
+				}
 			}
 		})
 	}
@@ -372,547 +307,6 @@ func TestServer_getBuilderBlock(t *testing.T) {
 	}
 }
 
-func TestServer_readyForBuilder(t *testing.T) {
-	ctx := context.Background()
-	vs := &Server{BeaconDB: dbTest.SetupDB(t)}
-	cs := &blockchainTest.ChainService{FinalizedCheckPoint: &ethpb.Checkpoint{}} // Checkpoint root is zeros.
-	vs.FinalizationFetcher = cs
-	ready, err := vs.readyForBuilder(ctx)
-	require.NoError(t, err)
-	require.Equal(t, false, ready)
-
-	b := util.NewBeaconBlockBellatrix()
-	wb, err := blocks.NewSignedBeaconBlock(b)
-	require.NoError(t, err)
-	wbr, err := wb.Block().HashTreeRoot()
-	require.NoError(t, err)
-
-	b1 := util.NewBeaconBlockBellatrix()
-	b1.Block.Body.ExecutionPayload.BlockNumber = 1 // Execution enabled.
-	wb1, err := blocks.NewSignedBeaconBlock(b1)
-	require.NoError(t, err)
-	wbr1, err := wb1.Block().HashTreeRoot()
-	require.NoError(t, err)
-	require.NoError(t, vs.BeaconDB.SaveBlock(ctx, wb))
-	require.NoError(t, vs.BeaconDB.SaveBlock(ctx, wb1))
-
-	// Ready is false given finalized block does not have execution.
-	cs = &blockchainTest.ChainService{FinalizedCheckPoint: &ethpb.Checkpoint{Root: wbr[:]}}
-	vs.FinalizationFetcher = cs
-	ready, err = vs.readyForBuilder(ctx)
-	require.NoError(t, err)
-	require.Equal(t, false, ready)
-
-	// Ready is true given finalized block has execution.
-	cs = &blockchainTest.ChainService{FinalizedCheckPoint: &ethpb.Checkpoint{Root: wbr1[:]}}
-	vs.FinalizationFetcher = cs
-	ready, err = vs.readyForBuilder(ctx)
-	require.NoError(t, err)
-	require.Equal(t, true, ready)
-}
-
-func TestServer_getAndBuildHeaderBlock(t *testing.T) {
-	ctx := context.Background()
-	vs := &Server{}
-
-	// Nil builder
-	ready, _, err := vs.GetAndBuildBlindBlock(ctx, nil)
-	require.NoError(t, err)
-	require.Equal(t, false, ready)
-
-	// Not configured
-	vs.BlockBuilder = &builderTest.MockBuilderService{}
-	ready, _, err = vs.GetAndBuildBlindBlock(ctx, nil)
-	require.NoError(t, err)
-	require.Equal(t, false, ready)
-
-	// Block is not ready
-	vs.BlockBuilder = &builderTest.MockBuilderService{HasConfigured: true}
-	vs.FinalizationFetcher = &blockchainTest.ChainService{FinalizedCheckPoint: &ethpb.Checkpoint{}}
-	ready, _, err = vs.GetAndBuildBlindBlock(ctx, nil)
-	require.NoError(t, err)
-	require.Equal(t, false, ready)
-
-	// Failed to get header
-	b1 := util.NewBeaconBlockBellatrix()
-	b1.Block.Body.ExecutionPayload.BlockNumber = 1 // Execution enabled.
-	wb1, err := blocks.NewSignedBeaconBlock(b1)
-	require.NoError(t, err)
-	wbr1, err := wb1.Block().HashTreeRoot()
-	require.NoError(t, err)
-	vs.BeaconDB = dbTest.SetupDB(t)
-	require.NoError(t, vs.BeaconDB.SaveBlock(ctx, wb1))
-	vs.FinalizationFetcher = &blockchainTest.ChainService{FinalizedCheckPoint: &ethpb.Checkpoint{Root: wbr1[:]}}
-	vs.HeadFetcher = &blockchainTest.ChainService{Block: wb1}
-	vs.BlockBuilder = &builderTest.MockBuilderService{HasConfigured: true, ErrGetHeader: errors.New("could not get payload")}
-	vs.ForkFetcher = &blockchainTest.ChainService{ForkChoiceStore: doublylinkedtree.New()}
-	ready, _, err = vs.GetAndBuildBlindBlock(ctx, &ethpb.BeaconBlockAltair{})
-	require.ErrorContains(t, "could not get payload", err)
-	require.Equal(t, false, ready)
-
-	// Block built and validated!
-	beaconState, keys := util.DeterministicGenesisStateAltair(t, 16384)
-	sCom, err := altair.NextSyncCommittee(context.Background(), beaconState)
-	require.NoError(t, err)
-	require.NoError(t, beaconState.SetCurrentSyncCommittee(sCom))
-	copiedState := beaconState.Copy()
-
-	b, err := util.GenerateFullBlockAltair(copiedState, keys, util.DefaultBlockGenConfig(), 1)
-	require.NoError(t, err)
-	r := bytesutil.ToBytes32(b.Block.ParentRoot)
-	util.SaveBlock(t, ctx, vs.BeaconDB, b)
-	require.NoError(t, vs.BeaconDB.SaveState(ctx, beaconState, r))
-
-	altairBlk, err := util.GenerateFullBlockAltair(copiedState, keys, util.DefaultBlockGenConfig(), 2)
-	require.NoError(t, err)
-
-	ts := uint64(time.Now().Unix()) + uint64(altairBlk.Block.Slot)*params.BeaconConfig().SecondsPerSlot
-	h := &v1.ExecutionPayloadHeader{
-		BlockNumber:      123,
-		GasLimit:         456,
-		GasUsed:          789,
-		ParentHash:       make([]byte, fieldparams.RootLength),
-		FeeRecipient:     make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:        make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:     make([]byte, fieldparams.RootLength),
-		LogsBloom:        make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:       make([]byte, fieldparams.RootLength),
-		BaseFeePerGas:    make([]byte, fieldparams.RootLength),
-		BlockHash:        make([]byte, fieldparams.RootLength),
-		TransactionsRoot: make([]byte, fieldparams.RootLength),
-		Timestamp:        ts,
-	}
-
-	vs.StateGen = stategen.New(vs.BeaconDB, doublylinkedtree.New())
-	vs.GenesisFetcher = &blockchainTest.ChainService{}
-	vs.ForkFetcher = &blockchainTest.ChainService{Fork: &ethpb.Fork{}}
-
-	sk, err := bls.RandKey()
-	require.NoError(t, err)
-	bid := &ethpb.BuilderBid{
-		Header: &v1.ExecutionPayloadHeader{
-			BlockNumber:      123,
-			GasLimit:         456,
-			GasUsed:          789,
-			ParentHash:       make([]byte, fieldparams.RootLength),
-			FeeRecipient:     make([]byte, fieldparams.FeeRecipientLength),
-			StateRoot:        make([]byte, fieldparams.RootLength),
-			ReceiptsRoot:     make([]byte, fieldparams.RootLength),
-			LogsBloom:        make([]byte, fieldparams.LogsBloomLength),
-			PrevRandao:       make([]byte, fieldparams.RootLength),
-			BaseFeePerGas:    make([]byte, fieldparams.RootLength),
-			BlockHash:        make([]byte, fieldparams.RootLength),
-			TransactionsRoot: make([]byte, fieldparams.RootLength),
-			Timestamp:        ts,
-		},
-		Pubkey: sk.PublicKey().Marshal(),
-		Value:  bytesutil.PadTo([]byte{1, 2, 3}, 32),
-	}
-	d := params.BeaconConfig().DomainApplicationBuilder
-	domain, err := signing.ComputeDomain(d, nil, nil)
-	require.NoError(t, err)
-	sr, err := signing.ComputeSigningRoot(bid, domain)
-	require.NoError(t, err)
-	sBid := &ethpb.SignedBuilderBid{
-		Message:   bid,
-		Signature: sk.Sign(sr[:]).Marshal(),
-	}
-	vs.BlockBuilder = &builderTest.MockBuilderService{HasConfigured: true, Bid: sBid}
-	vs.TimeFetcher = &blockchainTest.ChainService{Genesis: time.Now()}
-	vs.ForkFetcher = &blockchainTest.ChainService{ForkChoiceStore: doublylinkedtree.New()}
-	ready, builtBlk, err := vs.GetAndBuildBlindBlock(ctx, altairBlk.Block)
-	require.NoError(t, err)
-	require.Equal(t, true, ready)
-	require.DeepEqual(t, h, builtBlk.GetBlindedBellatrix().Body.ExecutionPayloadHeader)
-}
-
-func TestServer_GetBellatrixBeaconBlock_HappyCase(t *testing.T) {
-	db := dbTest.SetupDB(t)
-	ctx := context.Background()
-	hook := logTest.NewGlobal()
-
-	terminalBlockHash := bytesutil.PadTo([]byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-		0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 32)
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.BellatrixForkEpoch = 2
-	cfg.AltairForkEpoch = 1
-	cfg.TerminalBlockHash = common.BytesToHash(terminalBlockHash)
-	cfg.TerminalBlockHashActivationEpoch = 2
-	params.OverrideBeaconConfig(cfg)
-
-	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
-	stateRoot, err := beaconState.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	genesis := consensusblocks.NewGenesisBlock(stateRoot[:])
-	wsb, err := blocks.NewSignedBeaconBlock(genesis)
-	require.NoError(t, err)
-	require.NoError(t, db.SaveBlock(ctx, wsb), "Could not save genesis block")
-
-	parentRoot, err := genesis.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
-	require.NoError(t, err)
-
-	emptyPayload := &v1.ExecutionPayload{
-		ParentHash:    make([]byte, fieldparams.RootLength),
-		FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:     make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:  make([]byte, fieldparams.RootLength),
-		LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:    make([]byte, fieldparams.RootLength),
-		BaseFeePerGas: make([]byte, fieldparams.RootLength),
-		BlockHash:     make([]byte, fieldparams.RootLength),
-	}
-	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
-	blk := &ethpb.SignedBeaconBlockBellatrix{
-		Block: &ethpb.BeaconBlockBellatrix{
-			Slot:       bellatrixSlot + 1,
-			ParentRoot: parentRoot[:],
-			StateRoot:  genesis.Block.StateRoot,
-			Body: &ethpb.BeaconBlockBodyBellatrix{
-				RandaoReveal:     genesis.Block.Body.RandaoReveal,
-				Graffiti:         genesis.Block.Body.Graffiti,
-				Eth1Data:         genesis.Block.Body.Eth1Data,
-				SyncAggregate:    &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
-				ExecutionPayload: emptyPayload,
-			},
-		},
-		Signature: genesis.Signature,
-	}
-
-	blkRoot, err := blk.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
-
-	proposerServer := &Server{
-		HeadFetcher:       &blockchainTest.ChainService{State: beaconState, Root: parentRoot[:], Optimistic: false},
-		TimeFetcher:       &blockchainTest.ChainService{Genesis: time.Now()},
-		SyncChecker:       &mockSync.Sync{IsSyncing: false},
-		BlockReceiver:     &blockchainTest.ChainService{},
-		HeadUpdater:       &blockchainTest.ChainService{},
-		ChainStartFetcher: &mockExecution.Chain{},
-		Eth1InfoFetcher:   &mockExecution.Chain{},
-		MockEth1Votes:     true,
-		AttPool:           attestations.NewPool(),
-		SlashingsPool:     slashings.NewPool(),
-		ExitPool:          voluntaryexits.NewPool(),
-		StateGen:          stategen.New(db, doublylinkedtree.New()),
-		SyncCommitteePool: synccommittee.NewStore(),
-		ExecutionEngineCaller: &mockExecution.EngineClient{
-			PayloadIDBytes:   &v1.PayloadIDBytes{1},
-			ExecutionPayload: emptyPayload,
-		},
-		BeaconDB:               db,
-		ProposerSlotIndexCache: cache.NewProposerPayloadIDsCache(),
-		BlockBuilder:           &builderTest.MockBuilderService{},
-	}
-	proposerServer.ProposerSlotIndexCache.SetProposerAndPayloadIDs(17, 11, [8]byte{'a'}, parentRoot)
-
-	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
-	require.NoError(t, err)
-
-	block, err := proposerServer.getBellatrixBeaconBlock(ctx, &ethpb.BlockRequest{
-		Slot:         bellatrixSlot + 1,
-		RandaoReveal: randaoReveal,
-	})
-	require.NoError(t, err)
-	bellatrixBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Bellatrix)
-	require.Equal(t, true, ok)
-	require.LogsContain(t, hook, "Computed state root")
-	require.DeepEqual(t, emptyPayload, bellatrixBlk.Bellatrix.Body.ExecutionPayload) // Payload should equal.
-}
-
-func TestServer_GetBellatrixBeaconBlock_LocalProgressingWithBuilderSkipped(t *testing.T) {
-	db := dbTest.SetupDB(t)
-	ctx := context.Background()
-	hook := logTest.NewGlobal()
-
-	terminalBlockHash := bytesutil.PadTo([]byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-		0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 32)
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.BellatrixForkEpoch = 2
-	cfg.AltairForkEpoch = 1
-	cfg.TerminalBlockHash = common.BytesToHash(terminalBlockHash)
-	cfg.TerminalBlockHashActivationEpoch = 2
-	params.OverrideBeaconConfig(cfg)
-
-	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
-	stateRoot, err := beaconState.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	genesis := consensusblocks.NewGenesisBlock(stateRoot[:])
-	wsb, err := blocks.NewSignedBeaconBlock(genesis)
-	require.NoError(t, err)
-	require.NoError(t, db.SaveBlock(ctx, wsb), "Could not save genesis block")
-
-	parentRoot, err := genesis.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
-	require.NoError(t, err)
-
-	emptyPayload := &v1.ExecutionPayload{
-		ParentHash:    make([]byte, fieldparams.RootLength),
-		FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:     make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:  make([]byte, fieldparams.RootLength),
-		LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:    make([]byte, fieldparams.RootLength),
-		BaseFeePerGas: make([]byte, fieldparams.RootLength),
-		BlockHash:     make([]byte, fieldparams.RootLength),
-	}
-	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
-	blk := &ethpb.SignedBeaconBlockBellatrix{
-		Block: &ethpb.BeaconBlockBellatrix{
-			Slot:       bellatrixSlot + 1,
-			ParentRoot: parentRoot[:],
-			StateRoot:  genesis.Block.StateRoot,
-			Body: &ethpb.BeaconBlockBodyBellatrix{
-				RandaoReveal:     genesis.Block.Body.RandaoReveal,
-				Graffiti:         genesis.Block.Body.Graffiti,
-				Eth1Data:         genesis.Block.Body.Eth1Data,
-				SyncAggregate:    &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
-				ExecutionPayload: emptyPayload,
-			},
-		},
-		Signature: genesis.Signature,
-	}
-
-	blkRoot, err := blk.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
-
-	proposerServer := &Server{
-		HeadFetcher:       &blockchainTest.ChainService{State: beaconState, Root: parentRoot[:], Optimistic: false},
-		TimeFetcher:       &blockchainTest.ChainService{Genesis: time.Now()},
-		SyncChecker:       &mockSync.Sync{IsSyncing: false},
-		BlockReceiver:     &blockchainTest.ChainService{},
-		HeadUpdater:       &blockchainTest.ChainService{},
-		ChainStartFetcher: &mockExecution.Chain{},
-		Eth1InfoFetcher:   &mockExecution.Chain{},
-		MockEth1Votes:     true,
-		AttPool:           attestations.NewPool(),
-		SlashingsPool:     slashings.NewPool(),
-		ExitPool:          voluntaryexits.NewPool(),
-		StateGen:          stategen.New(db, doublylinkedtree.New()),
-		SyncCommitteePool: synccommittee.NewStore(),
-		ExecutionEngineCaller: &mockExecution.EngineClient{
-			PayloadIDBytes:   &v1.PayloadIDBytes{1},
-			ExecutionPayload: emptyPayload,
-		},
-		BeaconDB:               db,
-		ProposerSlotIndexCache: cache.NewProposerPayloadIDsCache(),
-		BlockBuilder:           &builderTest.MockBuilderService{},
-	}
-	proposerServer.ProposerSlotIndexCache.SetProposerAndPayloadIDs(17, 11, [8]byte{'a'}, parentRoot)
-
-	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
-	require.NoError(t, err)
-
-	// Configure builder, this should fail if it's not local engine processing
-	proposerServer.BlockBuilder = &builderTest.MockBuilderService{HasConfigured: true, ErrGetHeader: errors.New("bad)")}
-	block, err := proposerServer.getBellatrixBeaconBlock(ctx, &ethpb.BlockRequest{
-		Slot:         bellatrixSlot + 1,
-		RandaoReveal: randaoReveal,
-		SkipMevBoost: true,
-	})
-	require.NoError(t, err)
-	bellatrixBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Bellatrix)
-	require.Equal(t, true, ok)
-	require.LogsContain(t, hook, "Computed state root")
-	require.DeepEqual(t, emptyPayload, bellatrixBlk.Bellatrix.Body.ExecutionPayload) // Payload should equal.
-}
-
-func TestServer_GetBellatrixBeaconBlock_BuilderCase(t *testing.T) {
-	db := dbTest.SetupDB(t)
-	ctx := context.Background()
-	hook := logTest.NewGlobal()
-
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.BellatrixForkEpoch = 2
-	cfg.AltairForkEpoch = 1
-	params.OverrideBeaconConfig(cfg)
-
-	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
-	stateRoot, err := beaconState.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	genesis := consensusblocks.NewGenesisBlock(stateRoot[:])
-	wsb, err := blocks.NewSignedBeaconBlock(genesis)
-	require.NoError(t, err)
-	require.NoError(t, db.SaveBlock(ctx, wsb), "Could not save genesis block")
-
-	parentRoot, err := genesis.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
-	require.NoError(t, err)
-
-	emptyPayload := &v1.ExecutionPayload{
-		ParentHash:    make([]byte, fieldparams.RootLength),
-		FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:     make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:  make([]byte, fieldparams.RootLength),
-		LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:    make([]byte, fieldparams.RootLength),
-		BaseFeePerGas: make([]byte, fieldparams.RootLength),
-		BlockHash:     make([]byte, fieldparams.RootLength),
-	}
-	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
-	blk := &ethpb.SignedBeaconBlockBellatrix{
-		Block: &ethpb.BeaconBlockBellatrix{
-			Slot:       bellatrixSlot + 1,
-			ParentRoot: parentRoot[:],
-			StateRoot:  genesis.Block.StateRoot,
-			Body: &ethpb.BeaconBlockBodyBellatrix{
-				RandaoReveal:     genesis.Block.Body.RandaoReveal,
-				Graffiti:         genesis.Block.Body.Graffiti,
-				Eth1Data:         genesis.Block.Body.Eth1Data,
-				SyncAggregate:    &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
-				ExecutionPayload: emptyPayload,
-			},
-		},
-		Signature: genesis.Signature,
-	}
-
-	blkRoot, err := blk.Block.HashTreeRoot()
-	require.NoError(t, err)
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
-
-	b1 := util.NewBeaconBlockBellatrix()
-	b1.Block.Body.ExecutionPayload.BlockNumber = 1 // Execution enabled.
-	wb1, err := blocks.NewSignedBeaconBlock(b1)
-	require.NoError(t, err)
-	wbr1, err := wb1.Block().HashTreeRoot()
-	require.NoError(t, err)
-	require.NoError(t, db.SaveBlock(ctx, wb1))
-
-	random, err := helpers.RandaoMix(beaconState, prysmtime.CurrentEpoch(beaconState))
-	require.NoError(t, err)
-
-	tstamp, err := slots.ToTime(beaconState.GenesisTime(), bellatrixSlot+1)
-	require.NoError(t, err)
-	h := &v1.ExecutionPayloadHeader{
-		BlockNumber:      123,
-		GasLimit:         456,
-		GasUsed:          789,
-		ParentHash:       make([]byte, fieldparams.RootLength),
-		FeeRecipient:     make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:        make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:     make([]byte, fieldparams.RootLength),
-		LogsBloom:        make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:       random,
-		BaseFeePerGas:    make([]byte, fieldparams.RootLength),
-		BlockHash:        make([]byte, fieldparams.RootLength),
-		TransactionsRoot: make([]byte, fieldparams.RootLength),
-		ExtraData:        make([]byte, 0),
-		Timestamp:        uint64(tstamp.Unix()),
-	}
-
-	proposerServer := &Server{
-		FinalizationFetcher: &blockchainTest.ChainService{FinalizedCheckPoint: &ethpb.Checkpoint{Root: wbr1[:]}},
-		HeadFetcher:         &blockchainTest.ChainService{State: beaconState, Root: parentRoot[:], Optimistic: false, Block: wb1},
-		TimeFetcher:         &blockchainTest.ChainService{Genesis: time.Unix(int64(beaconState.GenesisTime()), 0)},
-		SyncChecker:         &mockSync.Sync{IsSyncing: false},
-		BlockReceiver:       &blockchainTest.ChainService{},
-		HeadUpdater:         &blockchainTest.ChainService{},
-		ForkFetcher:         &blockchainTest.ChainService{Fork: &ethpb.Fork{}},
-		GenesisFetcher:      &blockchainTest.ChainService{},
-		ChainStartFetcher:   &mockExecution.Chain{},
-		Eth1InfoFetcher:     &mockExecution.Chain{},
-		MockEth1Votes:       true,
-		AttPool:             attestations.NewPool(),
-		SlashingsPool:       slashings.NewPool(),
-		ExitPool:            voluntaryexits.NewPool(),
-		StateGen:            stategen.New(db, doublylinkedtree.New()),
-		SyncCommitteePool:   synccommittee.NewStore(),
-		ExecutionEngineCaller: &mockExecution.EngineClient{
-			PayloadIDBytes:   &v1.PayloadIDBytes{1},
-			ExecutionPayload: emptyPayload,
-		},
-		BeaconDB: db,
-	}
-	sk, err := bls.RandKey()
-	require.NoError(t, err)
-	bid := &ethpb.BuilderBid{
-		Header: h,
-		Pubkey: sk.PublicKey().Marshal(),
-		Value:  bytesutil.PadTo([]byte{1, 2, 3}, 32),
-	}
-	d := params.BeaconConfig().DomainApplicationBuilder
-	domain, err := signing.ComputeDomain(d, nil, nil)
-	require.NoError(t, err)
-	sr, err := signing.ComputeSigningRoot(bid, domain)
-	require.NoError(t, err)
-	sBid := &ethpb.SignedBuilderBid{
-		Message:   bid,
-		Signature: sk.Sign(sr[:]).Marshal(),
-	}
-	proposerServer.BlockBuilder = &builderTest.MockBuilderService{HasConfigured: true, Bid: sBid}
-	proposerServer.ForkFetcher = &blockchainTest.ChainService{ForkChoiceStore: doublylinkedtree.New()}
-	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
-	require.NoError(t, err)
-
-	require.NoError(t, proposerServer.BeaconDB.SaveRegistrationsByValidatorIDs(ctx, []types.ValidatorIndex{11},
-		[]*ethpb.ValidatorRegistrationV1{{FeeRecipient: bytesutil.PadTo([]byte{}, fieldparams.FeeRecipientLength), Pubkey: bytesutil.PadTo([]byte{}, fieldparams.BLSPubkeyLength)}}))
-
-	params.SetupTestConfigCleanup(t)
-	cfg.MaxBuilderConsecutiveMissedSlots = bellatrixSlot + 1
-	cfg.MaxBuilderEpochMissedSlots = 32
-	params.OverrideBeaconConfig(cfg)
-
-	block, err := proposerServer.getBellatrixBeaconBlock(ctx, &ethpb.BlockRequest{
-		Slot:         bellatrixSlot + 1,
-		RandaoReveal: randaoReveal,
-	})
-	require.NoError(t, err)
-	bellatrixBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_BlindedBellatrix)
-	require.Equal(t, true, ok)
-	require.LogsContain(t, hook, "Computed state root")
-	require.DeepEqual(t, h, bellatrixBlk.BlindedBellatrix.Body.ExecutionPayloadHeader) // Payload header should equal.
-}
-
-func TestServer_validatorRegistered(t *testing.T) {
-	proposerServer := &Server{}
-	ctx := context.Background()
-
-	reg, err := proposerServer.validatorRegistered(ctx, 0)
-	require.ErrorContains(t, "nil beacon db", err)
-	require.Equal(t, false, reg)
-
-	proposerServer.BeaconDB = dbTest.SetupDB(t)
-	reg, err = proposerServer.validatorRegistered(ctx, 0)
-	require.NoError(t, err)
-	require.Equal(t, false, reg)
-
-	f := bytesutil.PadTo([]byte{}, fieldparams.FeeRecipientLength)
-	p := bytesutil.PadTo([]byte{}, fieldparams.BLSPubkeyLength)
-	require.NoError(t, proposerServer.BeaconDB.SaveRegistrationsByValidatorIDs(ctx, []types.ValidatorIndex{0, 1},
-		[]*ethpb.ValidatorRegistrationV1{{FeeRecipient: f, Pubkey: p}, {FeeRecipient: f, Pubkey: p}}))
-
-	reg, err = proposerServer.validatorRegistered(ctx, 0)
-	require.NoError(t, err)
-	require.Equal(t, true, reg)
-	reg, err = proposerServer.validatorRegistered(ctx, 1)
-	require.NoError(t, err)
-	require.Equal(t, true, reg)
-}
-
 func TestServer_validateBuilderSignature(t *testing.T) {
 	sk, err := bls.RandKey()
 	require.NoError(t, err)
@@ -946,77 +340,3 @@ func TestServer_validateBuilderSignature(t *testing.T) {
 	sBid.Message.Value = make([]byte, 32)
 	require.ErrorIs(t, validateBuilderSignature(sBid), signing.ErrSigFailedToVerify)
 }
-
-func TestServer_circuitBreakBuilder(t *testing.T) {
-	hook := logTest.NewGlobal()
-	s := &Server{}
-	_, err := s.circuitBreakBuilder(0)
-	require.ErrorContains(t, "no fork choicer configured", err)
-
-	s.ForkFetcher = &blockchainTest.ChainService{ForkChoiceStore: doublylinkedtree.New()}
-	s.ForkFetcher.ForkChoicer().SetGenesisTime(uint64(time.Now().Unix()))
-	b, err := s.circuitBreakBuilder(params.BeaconConfig().MaxBuilderConsecutiveMissedSlots + 1)
-	require.NoError(t, err)
-	require.Equal(t, true, b)
-	require.LogsContain(t, hook, "Builder circuit breaker activated due to missing consecutive slot")
-
-	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
-	ctx := context.Background()
-	st, blkRoot, err := createState(1, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
-	require.NoError(t, err)
-	require.NoError(t, s.ForkFetcher.ForkChoicer().InsertNode(ctx, st, blkRoot))
-	b, err = s.circuitBreakBuilder(params.BeaconConfig().MaxBuilderConsecutiveMissedSlots + 1)
-	require.NoError(t, err)
-	require.Equal(t, false, b)
-
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.MaxBuilderEpochMissedSlots = 4
-	params.OverrideBeaconConfig(cfg)
-	st, blkRoot, err = createState(params.BeaconConfig().SlotsPerEpoch, [32]byte{'b'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
-	require.NoError(t, err)
-	require.NoError(t, s.ForkFetcher.ForkChoicer().InsertNode(ctx, st, blkRoot))
-	b, err = s.circuitBreakBuilder(params.BeaconConfig().SlotsPerEpoch + 1)
-	require.NoError(t, err)
-	require.Equal(t, true, b)
-	require.LogsContain(t, hook, "Builder circuit breaker activated due to missing enough slots last epoch")
-
-	want := params.BeaconConfig().SlotsPerEpoch - params.BeaconConfig().MaxBuilderEpochMissedSlots
-	for i := types.Slot(2); i <= want+2; i++ {
-		st, blkRoot, err = createState(i, [32]byte{byte(i)}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
-		require.NoError(t, err)
-		require.NoError(t, s.ForkFetcher.ForkChoicer().InsertNode(ctx, st, blkRoot))
-	}
-	b, err = s.circuitBreakBuilder(params.BeaconConfig().SlotsPerEpoch + 1)
-	require.NoError(t, err)
-	require.Equal(t, false, b)
-}
-
-func createState(
-	slot types.Slot,
-	blockRoot [32]byte,
-	parentRoot [32]byte,
-	payloadHash [32]byte,
-	justified *ethpb.Checkpoint,
-	finalized *ethpb.Checkpoint,
-) (state.BeaconState, [32]byte, error) {
-
-	base := &ethpb.BeaconStateBellatrix{
-		Slot:                       slot,
-		RandaoMixes:                make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
-		BlockRoots:                 make([][]byte, 1),
-		CurrentJustifiedCheckpoint: justified,
-		FinalizedCheckpoint:        finalized,
-		LatestExecutionPayloadHeader: &v1.ExecutionPayloadHeader{
-			BlockHash: payloadHash[:],
-		},
-		LatestBlockHeader: &ethpb.BeaconBlockHeader{
-			ParentRoot: parentRoot[:],
-		},
-	}
-
-	base.BlockRoots[0] = append(base.BlockRoots[0], blockRoot[:]...)
-	st, err := state_native.InitializeFromProtoBellatrix(base)
-	return st, blockRoot, err
-}

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

@@ -0,0 +1,89 @@
+package validator
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/kv"
+	"github.com/prysmaticlabs/prysm/v3/config/params"
+	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
+	"github.com/sirupsen/logrus"
+)
+
+// Returns true if builder (ie outsourcing block construction) can be used. Both conditions have to meet:
+// - Validator has registered to use builder (ie called registerBuilder API end point)
+// - Circuit breaker has not been activated (ie the liveness of the chain is healthy)
+func (vs *Server) canUseBuilder(ctx context.Context, slot types.Slot, idx types.ValidatorIndex) (bool, error) {
+	activated, err := vs.circuitBreakBuilder(slot)
+	if err != nil {
+		return false, err
+	}
+	if activated {
+		return false, nil
+	}
+	return vs.validatorRegistered(ctx, idx)
+}
+
+// validatorRegistered returns true if validator with index `id` was previously registered in the database.
+func (vs *Server) validatorRegistered(ctx context.Context, id types.ValidatorIndex) (bool, error) {
+	if vs.BeaconDB == nil {
+		return false, errors.New("nil beacon db")
+	}
+	_, err := vs.BeaconDB.RegistrationByValidatorID(ctx, id)
+	switch {
+	case errors.Is(err, kv.ErrNotFoundFeeRecipient):
+		return false, nil
+	case err != nil:
+		return false, err
+	}
+	return true, nil
+}
+
+// circuitBreakBuilder returns true if the builder is not allowed to be used due to circuit breaker conditions.
+func (vs *Server) circuitBreakBuilder(s types.Slot) (bool, error) {
+	if vs.ForkFetcher == nil || vs.ForkFetcher.ForkChoicer() == nil {
+		return true, errors.New("no fork choicer configured")
+	}
+
+	// Circuit breaker is active if the missing consecutive slots greater than `MaxBuilderConsecutiveMissedSlots`.
+	highestReceivedSlot := vs.ForkFetcher.ForkChoicer().HighestReceivedBlockSlot()
+	maxConsecutiveSkipSlotsAllowed := params.BeaconConfig().MaxBuilderConsecutiveMissedSlots
+	diff, err := s.SafeSubSlot(highestReceivedSlot)
+	if err != nil {
+		return true, err
+	}
+
+	if diff > maxConsecutiveSkipSlotsAllowed {
+		log.WithFields(logrus.Fields{
+			"currentSlot":                    s,
+			"highestReceivedSlot":            highestReceivedSlot,
+			"maxConsecutiveSkipSlotsAllowed": maxConsecutiveSkipSlotsAllowed,
+		}).Warn("Circuit breaker activated due to missing consecutive slot. Ignore if mev-boost is not used")
+		return true, nil
+	}
+
+	// Not much reason to check missed slots epoch rolling window if input slot is less than epoch.
+	if s < params.BeaconConfig().SlotsPerEpoch {
+		return false, nil
+	}
+
+	// Circuit breaker is active if the missing slots per epoch (rolling window) greater than `MaxBuilderEpochMissedSlots`.
+	receivedCount, err := vs.ForkFetcher.ForkChoicer().ReceivedBlocksLastEpoch()
+	if err != nil {
+		return true, err
+	}
+	maxEpochSkipSlotsAllowed := params.BeaconConfig().MaxBuilderEpochMissedSlots
+	diff, err = params.BeaconConfig().SlotsPerEpoch.SafeSub(receivedCount)
+	if err != nil {
+		return true, err
+	}
+	if diff > maxEpochSkipSlotsAllowed {
+		log.WithFields(logrus.Fields{
+			"totalMissed":              diff,
+			"maxEpochSkipSlotsAllowed": maxEpochSkipSlotsAllowed,
+		}).Warn("Circuit breaker activated due to missing enough slots last epoch. Ignore if mev-boost is not used")
+		return true, nil
+	}
+
+	return false, nil
+}

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

@@ -0,0 +1,153 @@
+package validator
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	blockchainTest "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
+	dbTest "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
+	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
+	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v3/config/params"
+	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
+	v1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	logTest "github.com/sirupsen/logrus/hooks/test"
+)
+
+func TestServer_circuitBreakBuilder(t *testing.T) {
+	hook := logTest.NewGlobal()
+	s := &Server{}
+	_, err := s.circuitBreakBuilder(0)
+	require.ErrorContains(t, "no fork choicer configured", err)
+
+	s.ForkFetcher = &blockchainTest.ChainService{ForkChoiceStore: doublylinkedtree.New()}
+	s.ForkFetcher.ForkChoicer().SetGenesisTime(uint64(time.Now().Unix()))
+	b, err := s.circuitBreakBuilder(params.BeaconConfig().MaxBuilderConsecutiveMissedSlots + 1)
+	require.NoError(
+		t,
+		err,
+	)
+	require.Equal(t, true, b)
+	require.LogsContain(t, hook, "Circuit breaker activated due to missing consecutive slot. Ignore if mev-boost is not used")
+
+	ojc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
+	ofc := &ethpb.Checkpoint{Root: params.BeaconConfig().ZeroHash[:]}
+	ctx := context.Background()
+	st, blkRoot, err := createState(1, [32]byte{'a'}, [32]byte{}, params.BeaconConfig().ZeroHash, ojc, ofc)
+	require.NoError(t, err)
+	require.NoError(t, s.ForkFetcher.ForkChoicer().InsertNode(ctx, st, blkRoot))
+	b, err = s.circuitBreakBuilder(params.BeaconConfig().MaxBuilderConsecutiveMissedSlots + 1)
+	require.NoError(t, err)
+	require.Equal(t, false, b)
+
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.MaxBuilderEpochMissedSlots = 4
+	params.OverrideBeaconConfig(cfg)
+	st, blkRoot, err = createState(params.BeaconConfig().SlotsPerEpoch, [32]byte{'b'}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
+	require.NoError(t, err)
+	require.NoError(t, s.ForkFetcher.ForkChoicer().InsertNode(ctx, st, blkRoot))
+	b, err = s.circuitBreakBuilder(params.BeaconConfig().SlotsPerEpoch + 1)
+	require.NoError(t, err)
+	require.Equal(t, true, b)
+	require.LogsContain(t, hook, "Circuit breaker activated due to missing enough slots last epoch. Ignore if mev-boost is not used")
+
+	want := params.BeaconConfig().SlotsPerEpoch - params.BeaconConfig().MaxBuilderEpochMissedSlots
+	for i := types.Slot(2); i <= want+2; i++ {
+		st, blkRoot, err = createState(i, [32]byte{byte(i)}, [32]byte{'a'}, params.BeaconConfig().ZeroHash, ojc, ofc)
+		require.NoError(t, err)
+		require.NoError(t, s.ForkFetcher.ForkChoicer().InsertNode(ctx, st, blkRoot))
+	}
+	b, err = s.circuitBreakBuilder(params.BeaconConfig().SlotsPerEpoch + 1)
+	require.NoError(t, err)
+	require.Equal(t, false, b)
+}
+
+func TestServer_validatorRegistered(t *testing.T) {
+	proposerServer := &Server{}
+	ctx := context.Background()
+
+	reg, err := proposerServer.validatorRegistered(ctx, 0)
+	require.ErrorContains(t, "nil beacon db", err)
+	require.Equal(t, false, reg)
+
+	proposerServer.BeaconDB = dbTest.SetupDB(t)
+	reg, err = proposerServer.validatorRegistered(ctx, 0)
+	require.NoError(t, err)
+	require.Equal(t, false, reg)
+
+	f := bytesutil.PadTo([]byte{}, fieldparams.FeeRecipientLength)
+	p := bytesutil.PadTo([]byte{}, fieldparams.BLSPubkeyLength)
+	require.NoError(t, proposerServer.BeaconDB.SaveRegistrationsByValidatorIDs(ctx, []types.ValidatorIndex{0, 1},
+		[]*ethpb.ValidatorRegistrationV1{{FeeRecipient: f, Pubkey: p}, {FeeRecipient: f, Pubkey: p}}))
+
+	reg, err = proposerServer.validatorRegistered(ctx, 0)
+	require.NoError(t, err)
+	require.Equal(t, true, reg)
+	reg, err = proposerServer.validatorRegistered(ctx, 1)
+	require.NoError(t, err)
+	require.Equal(t, true, reg)
+}
+
+func TestServer_canUseBuilder(t *testing.T) {
+	proposerServer := &Server{}
+	ctx := context.Background()
+
+	proposerServer.ForkFetcher = &blockchainTest.ChainService{ForkChoiceStore: doublylinkedtree.New()}
+	proposerServer.ForkFetcher.ForkChoicer().SetGenesisTime(uint64(time.Now().Unix()))
+	reg, err := proposerServer.canUseBuilder(ctx, params.BeaconConfig().MaxBuilderConsecutiveMissedSlots+1, 0)
+	require.NoError(t, err)
+	require.Equal(t, false, reg)
+
+	reg, err = proposerServer.validatorRegistered(ctx, 0)
+	require.ErrorContains(t, "nil beacon db", err)
+	require.Equal(t, false, reg)
+
+	proposerServer.BeaconDB = dbTest.SetupDB(t)
+	reg, err = proposerServer.canUseBuilder(ctx, 1, 0)
+	require.NoError(t, err)
+	require.Equal(t, false, reg)
+
+	f := bytesutil.PadTo([]byte{}, fieldparams.FeeRecipientLength)
+	p := bytesutil.PadTo([]byte{}, fieldparams.BLSPubkeyLength)
+	require.NoError(t, proposerServer.BeaconDB.SaveRegistrationsByValidatorIDs(ctx, []types.ValidatorIndex{0},
+		[]*ethpb.ValidatorRegistrationV1{{FeeRecipient: f, Pubkey: p}}))
+
+	reg, err = proposerServer.canUseBuilder(ctx, params.BeaconConfig().MaxBuilderConsecutiveMissedSlots, 0)
+	require.NoError(t, err)
+	require.Equal(t, true, reg)
+}
+
+func createState(
+	slot types.Slot,
+	blockRoot [32]byte,
+	parentRoot [32]byte,
+	payloadHash [32]byte,
+	justified *ethpb.Checkpoint,
+	finalized *ethpb.Checkpoint,
+) (state.BeaconState, [32]byte, error) {
+
+	base := &ethpb.BeaconStateBellatrix{
+		Slot:                       slot,
+		RandaoMixes:                make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
+		BlockRoots:                 make([][]byte, 1),
+		CurrentJustifiedCheckpoint: justified,
+		FinalizedCheckpoint:        finalized,
+		LatestExecutionPayloadHeader: &v1.ExecutionPayloadHeader{
+			BlockHash: payloadHash[:],
+		},
+		LatestBlockHeader: &ethpb.BeaconBlockHeader{
+			ParentRoot: parentRoot[:],
+		},
+	}
+
+	base.BlockRoots[0] = append(base.BlockRoots[0], blockRoot[:]...)
+	st, err := state_native.InitializeFromProtoBellatrix(base)
+	return st, blockRoot, err
+}

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

@@ -0,0 +1,29 @@
+package validator
+
+import (
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
+	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v3/runtime/version"
+)
+
+// Sets the bls to exec data for a block.
+func (vs *Server) setBlsToExecData(blk interfaces.BeaconBlock, headState state.BeaconState) {
+	if blk.Version() < version.Capella {
+		return
+	}
+	if err := blk.Body().SetBLSToExecutionChanges([]*ethpb.SignedBLSToExecutionChange{}); err != nil {
+		log.WithError(err).Error("Could not set bls to execution data in block")
+		return
+	}
+	changes, err := vs.BLSChangesPool.BLSToExecChangesForInclusion(headState)
+	if err != nil {
+		log.WithError(err).Error("Could not get bls to execution changes")
+		return
+	} else {
+		if err := blk.Body().SetBLSToExecutionChanges(changes); err != nil {
+			log.WithError(err).Error("Could not set bls to execution changes")
+			return
+		}
+	}
+}

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

@@ -12,11 +12,12 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/kv"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
 	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v3/config/params"
 	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
 	payloadattribute "github.com/prysmaticlabs/prysm/v3/consensus-types/payload-attribute"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
@@ -41,7 +42,7 @@ var (
 
 // This returns the execution payload of a given slot. The function has full awareness of pre and post merge.
 // The payload is computed given the respected time of merge.
-func (vs *Server) getExecutionPayload(ctx context.Context, slot types.Slot, vIdx types.ValidatorIndex, headRoot [32]byte) (*enginev1.ExecutionPayload, error) {
+func (vs *Server) getExecutionPayload(ctx context.Context, slot types.Slot, vIdx types.ValidatorIndex, headRoot [32]byte, st state.BeaconState) (interfaces.ExecutionData, error) {
 	proposerID, payloadId, ok := vs.ProposerSlotIndexCache.GetProposerPayloadIDs(slot, headRoot)
 	feeRecipient := params.BeaconConfig().DefaultFeeRecipient
 	recipient, err := vs.BeaconDB.FeeRecipientByValidatorID(ctx, vIdx)
@@ -71,27 +72,14 @@ func (vs *Server) getExecutionPayload(ctx context.Context, slot types.Slot, vIdx
 		payload, err := vs.ExecutionEngineCaller.GetPayload(ctx, pid, slot)
 		switch {
 		case err == nil:
-			pb, err := payload.PbBellatrix()
-			if err != nil {
-				return nil, err
-			}
-			warnIfFeeRecipientDiffers(pb, feeRecipient)
-			return pb, nil
+			warnIfFeeRecipientDiffers(payload, feeRecipient)
+			return payload, nil
 		case errors.Is(err, context.DeadlineExceeded):
 		default:
 			return nil, errors.Wrap(err, "could not get cached payload from execution client")
 		}
 	}
 
-	st, err := vs.HeadFetcher.HeadState(ctx)
-	if err != nil {
-		return nil, err
-	}
-	st, err = transition.ProcessSlotsIfPossible(ctx, st, slot)
-	if err != nil {
-		return nil, err
-	}
-
 	var parentHash []byte
 	var hasTerminalBlock bool
 	mergeComplete, err := blocks.IsMergeTransitionComplete(st)
@@ -111,14 +99,14 @@ func (vs *Server) getExecutionPayload(ctx context.Context, slot types.Slot, vIdx
 		parentHash = header.BlockHash()
 	} else {
 		if activationEpochNotReached(slot) {
-			return emptyPayload(), nil
+			return consensusblocks.WrappedExecutionPayload(emptyPayload())
 		}
 		parentHash, hasTerminalBlock, err = vs.getTerminalBlockHashIfExists(ctx, uint64(t.Unix()))
 		if err != nil {
 			return nil, err
 		}
 		if !hasTerminalBlock {
-			return emptyPayload(), nil
+			return consensusblocks.WrappedExecutionPayload(emptyPayload())
 		}
 	}
 	payloadIDCacheMiss.Inc()
@@ -176,22 +164,18 @@ func (vs *Server) getExecutionPayload(ctx context.Context, slot types.Slot, vIdx
 	if err != nil {
 		return nil, err
 	}
-	pb, err := payload.PbBellatrix()
-	if err != nil {
-		return nil, err
-	}
-	warnIfFeeRecipientDiffers(pb, feeRecipient)
-	return pb, nil
+	warnIfFeeRecipientDiffers(payload, feeRecipient)
+	return payload, nil
 }
 
 // warnIfFeeRecipientDiffers logs a warning if the fee recipient in the included payload does not
 // match the requested one.
-func warnIfFeeRecipientDiffers(payload *enginev1.ExecutionPayload, feeRecipient common.Address) {
+func warnIfFeeRecipientDiffers(payload interfaces.ExecutionData, feeRecipient common.Address) {
 	// Warn if the fee recipient is not the value we expect.
-	if payload != nil && !bytes.Equal(payload.FeeRecipient, feeRecipient[:]) {
+	if payload != nil && !bytes.Equal(payload.FeeRecipient(), feeRecipient[:]) {
 		logrus.WithFields(logrus.Fields{
 			"wantedFeeRecipient": fmt.Sprintf("%#x", feeRecipient),
-			"received":           fmt.Sprintf("%#x", payload.FeeRecipient),
+			"received":           fmt.Sprintf("%#x", payload.FeeRecipient()),
 		}).Warn("Fee recipient address from execution client is not what was expected. " +
 			"It is possible someone has compromised your client to try and take your transaction fees")
 	}

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

@@ -124,7 +124,7 @@ func TestServer_getExecutionPayload(t *testing.T) {
 				ProposerSlotIndexCache: cache.NewProposerPayloadIDsCache(),
 			}
 			vs.ProposerSlotIndexCache.SetProposerAndPayloadIDs(tt.st.Slot(), 100, [8]byte{100}, [32]byte{'a'})
-			_, err := vs.getExecutionPayload(context.Background(), tt.st.Slot(), tt.validatorIndx, [32]byte{'a'})
+			_, err := vs.getExecutionPayload(context.Background(), tt.st.Slot(), tt.validatorIndx, [32]byte{'a'}, tt.st)
 			if tt.errString != "" {
 				require.ErrorContains(t, tt.errString, err)
 			} else {
@@ -160,7 +160,7 @@ func TestServer_getExecutionPayloadContextTimeout(t *testing.T) {
 	}
 	vs.ProposerSlotIndexCache.SetProposerAndPayloadIDs(nonTransitionSt.Slot(), 100, [8]byte{100}, [32]byte{'a'})
 
-	_, err = vs.getExecutionPayload(context.Background(), nonTransitionSt.Slot(), 100, [32]byte{'a'})
+	_, err = vs.getExecutionPayload(context.Background(), nonTransitionSt.Slot(), 100, [32]byte{'a'}, nonTransitionSt)
 	require.NoError(t, err)
 }
 
@@ -205,7 +205,7 @@ func TestServer_getExecutionPayload_UnexpectedFeeRecipient(t *testing.T) {
 		BeaconDB:               beaconDB,
 		ProposerSlotIndexCache: cache.NewProposerPayloadIDsCache(),
 	}
-	gotPayload, err := vs.getExecutionPayload(context.Background(), transitionSt.Slot(), 0, [32]byte{})
+	gotPayload, err := vs.getExecutionPayload(context.Background(), transitionSt.Slot(), 0, [32]byte{}, transitionSt)
 	require.NoError(t, err)
 	require.NotNil(t, gotPayload)
 
@@ -217,7 +217,7 @@ func TestServer_getExecutionPayload_UnexpectedFeeRecipient(t *testing.T) {
 	payload.FeeRecipient = evilRecipientAddress[:]
 	vs.ProposerSlotIndexCache = cache.NewProposerPayloadIDsCache()
 
-	gotPayload, err = vs.getExecutionPayload(context.Background(), transitionSt.Slot(), 0, [32]byte{})
+	gotPayload, err = vs.getExecutionPayload(context.Background(), transitionSt.Slot(), 0, [32]byte{}, transitionSt)
 	require.NoError(t, err)
 	require.NotNil(t, gotPayload)
 

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_phase0.go

@@ -1,170 +0,0 @@
-package validator
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition/interop"
-	v "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/validators"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"go.opencensus.io/trace"
-)
-
-// blockData required to create a beacon block.
-type blockData struct {
-	ParentRoot        []byte
-	Graffiti          [32]byte
-	ProposerIdx       types.ValidatorIndex
-	Eth1Data          *ethpb.Eth1Data
-	Deposits          []*ethpb.Deposit
-	Attestations      []*ethpb.Attestation
-	ProposerSlashings []*ethpb.ProposerSlashing
-	AttesterSlashings []*ethpb.AttesterSlashing
-	VoluntaryExits    []*ethpb.SignedVoluntaryExit
-}
-
-func (vs *Server) getPhase0BeaconBlock(ctx context.Context, req *ethpb.BlockRequest) (*ethpb.BeaconBlock, error) {
-	ctx, span := trace.StartSpan(ctx, "ProposerServer.getPhase0BeaconBlock")
-	defer span.End()
-	blkData, err := vs.buildPhase0BlockData(ctx, req)
-	if err != nil {
-		return nil, fmt.Errorf("could not build block data: %v", err)
-	}
-
-	// Use zero hash as stub for state root to compute later.
-	stateRoot := params.BeaconConfig().ZeroHash[:]
-
-	blk := &ethpb.BeaconBlock{
-		Slot:          req.Slot,
-		ParentRoot:    blkData.ParentRoot,
-		StateRoot:     stateRoot,
-		ProposerIndex: blkData.ProposerIdx,
-		Body: &ethpb.BeaconBlockBody{
-			Eth1Data:          blkData.Eth1Data,
-			Deposits:          blkData.Deposits,
-			Attestations:      blkData.Attestations,
-			RandaoReveal:      req.RandaoReveal,
-			ProposerSlashings: blkData.ProposerSlashings,
-			AttesterSlashings: blkData.AttesterSlashings,
-			VoluntaryExits:    blkData.VoluntaryExits,
-			Graffiti:          blkData.Graffiti[:],
-		},
-	}
-
-	// Compute state root with the newly constructed block.
-	wsb, err := consensusblocks.NewSignedBeaconBlock(&ethpb.SignedBeaconBlock{Block: blk, Signature: make([]byte, 96)})
-	if err != nil {
-		return nil, err
-	}
-	stateRoot, err = vs.computeStateRoot(ctx, wsb)
-	if err != nil {
-		interop.WriteBlockToDisk(wsb, true /*failed*/)
-		return nil, errors.Wrap(err, "could not compute state root")
-	}
-	blk.StateRoot = stateRoot
-	return blk, nil
-}
-
-// Build data required for creating a new beacon block, so this method can be shared across forks.
-func (vs *Server) buildPhase0BlockData(ctx context.Context, req *ethpb.BlockRequest) (*blockData, error) {
-	ctx, span := trace.StartSpan(ctx, "ProposerServer.buildPhase0BlockData")
-	defer span.End()
-
-	if vs.SyncChecker.Syncing() {
-		return nil, fmt.Errorf("syncing to latest head, not ready to respond")
-	}
-
-	if err := vs.HeadUpdater.UpdateHead(ctx); err != nil {
-		log.WithError(err).Error("Could not process attestations and update head")
-	}
-
-	// Retrieve the parent block as the current head of the canonical chain.
-	parentRoot, err := vs.HeadFetcher.HeadRoot(ctx)
-	if err != nil {
-		return nil, fmt.Errorf("could not retrieve head root: %v", err)
-	}
-
-	head, err := vs.HeadFetcher.HeadState(ctx)
-	if err != nil {
-		return nil, fmt.Errorf("could not get head state %v", err)
-	}
-
-	head, err = transition.ProcessSlotsUsingNextSlotCache(ctx, head, parentRoot, req.Slot)
-	if err != nil {
-		return nil, fmt.Errorf("could not advance slots to calculate proposer index: %v", err)
-	}
-
-	eth1Data, err := vs.eth1DataMajorityVote(ctx, head)
-	if err != nil {
-		return nil, fmt.Errorf("could not get ETH1 data: %v", err)
-	}
-
-	deposits, atts, err := vs.packDepositsAndAttestations(ctx, head, eth1Data)
-	if err != nil {
-		return nil, err
-	}
-
-	graffiti := bytesutil.ToBytes32(req.Graffiti)
-
-	// Calculate new proposer index.
-	idx, err := helpers.BeaconProposerIndex(ctx, head)
-	if err != nil {
-		return nil, fmt.Errorf("could not calculate proposer index %v", err)
-	}
-
-	proposerSlashings := vs.SlashingsPool.PendingProposerSlashings(ctx, head, false /*noLimit*/)
-	validProposerSlashings := make([]*ethpb.ProposerSlashing, 0, len(proposerSlashings))
-	for _, slashing := range proposerSlashings {
-		_, err := blocks.ProcessProposerSlashing(ctx, head, slashing, v.SlashValidator)
-		if err != nil {
-			log.WithError(err).Warn("Proposer: invalid proposer slashing")
-			continue
-		}
-		validProposerSlashings = append(validProposerSlashings, slashing)
-	}
-
-	attSlashings := vs.SlashingsPool.PendingAttesterSlashings(ctx, head, false /*noLimit*/)
-	validAttSlashings := make([]*ethpb.AttesterSlashing, 0, len(attSlashings))
-	for _, slashing := range attSlashings {
-		_, err := blocks.ProcessAttesterSlashing(ctx, head, slashing, v.SlashValidator)
-		if err != nil {
-			log.WithError(err).Warn("Proposer: invalid attester slashing")
-			continue
-		}
-		validAttSlashings = append(validAttSlashings, slashing)
-	}
-	exits := vs.ExitPool.PendingExits(head, req.Slot, false /*noLimit*/)
-	validExits := make([]*ethpb.SignedVoluntaryExit, 0, len(exits))
-	for _, exit := range exits {
-		val, err := head.ValidatorAtIndexReadOnly(exit.Exit.ValidatorIndex)
-		if err != nil {
-			log.WithError(err).Warn("Proposer: invalid exit")
-			continue
-		}
-		if err := blocks.VerifyExitAndSignature(val, head.Slot(), head.Fork(), exit, head.GenesisValidatorsRoot()); err != nil {
-			log.WithError(err).Warn("Proposer: invalid exit")
-			continue
-		}
-		validExits = append(validExits, exit)
-	}
-
-	return &blockData{
-		ParentRoot:        parentRoot,
-		Graffiti:          graffiti,
-		ProposerIdx:       idx,
-		Eth1Data:          eth1Data,
-		Deposits:          deposits,
-		Attestations:      atts,
-		ProposerSlashings: validProposerSlashings,
-		AttesterSlashings: validAttSlashings,
-		VoluntaryExits:    validExits,
-	}, nil
-}

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

@@ -19,14 +19,19 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
 	coretime "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
 	dbutil "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
 	mockExecution "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
 	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/slashings"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/synccommittee"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits"
 	mockp2p "github.com/prysmaticlabs/prysm/v3/beacon-chain/p2p/testing"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/rpc/testutil"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
 	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
 	mockSync "github.com/prysmaticlabs/prysm/v3/beacon-chain/sync/initial-sync/testing"
@@ -51,6 +56,449 @@ import (
 	"google.golang.org/protobuf/proto"
 )
 
+func TestServer_GetBeaconBlock_Phase0(t *testing.T) {
+	db := dbutil.SetupDB(t)
+	ctx := context.Background()
+
+	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
+	stateRoot, err := beaconState.HashTreeRoot(ctx)
+	require.NoError(t, err, "Could not hash genesis state")
+
+	genesis := b.NewGenesisBlock(stateRoot[:])
+	genBlk := &ethpb.SignedBeaconBlock{
+		Block: &ethpb.BeaconBlock{
+			Slot:       genesis.Block.Slot,
+			ParentRoot: genesis.Block.ParentRoot,
+			StateRoot:  genesis.Block.StateRoot,
+			Body: &ethpb.BeaconBlockBody{
+				RandaoReveal: genesis.Block.Body.RandaoReveal,
+				Graffiti:     genesis.Block.Body.Graffiti,
+				Eth1Data:     genesis.Block.Body.Eth1Data,
+			},
+		},
+		Signature: genesis.Signature,
+	}
+	util.SaveBlock(t, ctx, db, genBlk)
+
+	parentRoot, err := genBlk.Block.HashTreeRoot()
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
+
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
+
+	proposerServer := getProposerServer(db, beaconState, parentRoot[:])
+
+	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
+	require.NoError(t, err)
+
+	graffiti := bytesutil.ToBytes32([]byte("eth2"))
+	req := &ethpb.BlockRequest{
+		Slot:         1,
+		RandaoReveal: randaoReveal,
+		Graffiti:     graffiti[:],
+	}
+	proposerSlashings, attSlashings := injectSlashings(t, beaconState, privKeys, proposerServer)
+
+	block, err := proposerServer.GetBeaconBlock(ctx, req)
+	require.NoError(t, err)
+	phase0Blk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Phase0)
+	require.Equal(t, true, ok)
+	assert.Equal(t, req.Slot, phase0Blk.Phase0.Slot)
+	assert.DeepEqual(t, parentRoot[:], phase0Blk.Phase0.ParentRoot, "Expected block to have correct parent root")
+	assert.DeepEqual(t, randaoReveal, phase0Blk.Phase0.Body.RandaoReveal, "Expected block to have correct randao reveal")
+	assert.DeepEqual(t, req.Graffiti, phase0Blk.Phase0.Body.Graffiti, "Expected block to have correct Graffiti")
+	assert.Equal(t, params.BeaconConfig().MaxProposerSlashings, uint64(len(phase0Blk.Phase0.Body.ProposerSlashings)))
+	assert.DeepEqual(t, proposerSlashings, phase0Blk.Phase0.Body.ProposerSlashings)
+	assert.Equal(t, params.BeaconConfig().MaxAttesterSlashings, uint64(len(phase0Blk.Phase0.Body.AttesterSlashings)))
+	assert.DeepEqual(t, attSlashings, phase0Blk.Phase0.Body.AttesterSlashings)
+}
+
+func TestServer_GetBeaconBlock_Altair(t *testing.T) {
+	db := dbutil.SetupDB(t)
+	ctx := context.Background()
+
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.AltairForkEpoch = 1
+	params.OverrideBeaconConfig(cfg)
+	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
+
+	stateRoot, err := beaconState.HashTreeRoot(ctx)
+	require.NoError(t, err, "Could not hash genesis state")
+
+	genesis := b.NewGenesisBlock(stateRoot[:])
+	util.SaveBlock(t, ctx, db, genesis)
+
+	parentRoot, err := genesis.Block.HashTreeRoot()
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
+
+	altairSlot, err := slots.EpochStart(params.BeaconConfig().AltairForkEpoch)
+	require.NoError(t, err)
+
+	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
+	genAltair := &ethpb.SignedBeaconBlockAltair{
+		Block: &ethpb.BeaconBlockAltair{
+			Slot:       altairSlot + 1,
+			ParentRoot: parentRoot[:],
+			StateRoot:  genesis.Block.StateRoot,
+			Body: &ethpb.BeaconBlockBodyAltair{
+				RandaoReveal:  genesis.Block.Body.RandaoReveal,
+				Graffiti:      genesis.Block.Body.Graffiti,
+				Eth1Data:      genesis.Block.Body.Eth1Data,
+				SyncAggregate: &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
+			},
+		},
+		Signature: genesis.Signature,
+	}
+
+	blkRoot, err := genAltair.Block.HashTreeRoot()
+	require.NoError(t, err)
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
+
+	proposerServer := getProposerServer(db, beaconState, parentRoot[:])
+
+	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
+	require.NoError(t, err)
+
+	graffiti := bytesutil.ToBytes32([]byte("eth2"))
+	require.NoError(t, err)
+	req := &ethpb.BlockRequest{
+		Slot:         altairSlot + 1,
+		RandaoReveal: randaoReveal,
+		Graffiti:     graffiti[:],
+	}
+	proposerSlashings, attSlashings := injectSlashings(t, beaconState, privKeys, proposerServer)
+
+	block, err := proposerServer.GetBeaconBlock(ctx, req)
+	require.NoError(t, err)
+	altairBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Altair)
+	require.Equal(t, true, ok)
+
+	assert.Equal(t, req.Slot, altairBlk.Altair.Slot)
+	assert.DeepEqual(t, parentRoot[:], altairBlk.Altair.ParentRoot, "Expected block to have correct parent root")
+	assert.DeepEqual(t, randaoReveal, altairBlk.Altair.Body.RandaoReveal, "Expected block to have correct randao reveal")
+	assert.DeepEqual(t, req.Graffiti, altairBlk.Altair.Body.Graffiti, "Expected block to have correct Graffiti")
+	assert.Equal(t, params.BeaconConfig().MaxProposerSlashings, uint64(len(altairBlk.Altair.Body.ProposerSlashings)))
+	assert.DeepEqual(t, proposerSlashings, altairBlk.Altair.Body.ProposerSlashings)
+	assert.Equal(t, params.BeaconConfig().MaxAttesterSlashings, uint64(len(altairBlk.Altair.Body.AttesterSlashings)))
+	assert.DeepEqual(t, attSlashings, altairBlk.Altair.Body.AttesterSlashings)
+}
+
+func TestServer_GetBeaconBlock_Bellatrix(t *testing.T) {
+	db := dbutil.SetupDB(t)
+	ctx := context.Background()
+	hook := logTest.NewGlobal()
+
+	terminalBlockHash := bytesutil.PadTo([]byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+		0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 32)
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.BellatrixForkEpoch = 2
+	cfg.AltairForkEpoch = 1
+	cfg.TerminalBlockHash = common.BytesToHash(terminalBlockHash)
+	cfg.TerminalBlockHashActivationEpoch = 2
+	params.OverrideBeaconConfig(cfg)
+	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
+
+	stateRoot, err := beaconState.HashTreeRoot(ctx)
+	require.NoError(t, err, "Could not hash genesis state")
+
+	genesis := b.NewGenesisBlock(stateRoot[:])
+	util.SaveBlock(t, ctx, db, genesis)
+
+	parentRoot, err := genesis.Block.HashTreeRoot()
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
+
+	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
+	require.NoError(t, err)
+
+	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
+	blk := &ethpb.SignedBeaconBlockBellatrix{
+		Block: &ethpb.BeaconBlockBellatrix{
+			Slot:       bellatrixSlot + 1,
+			ParentRoot: parentRoot[:],
+			StateRoot:  genesis.Block.StateRoot,
+			Body: &ethpb.BeaconBlockBodyBellatrix{
+				RandaoReveal:  genesis.Block.Body.RandaoReveal,
+				Graffiti:      genesis.Block.Body.Graffiti,
+				Eth1Data:      genesis.Block.Body.Eth1Data,
+				SyncAggregate: &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
+				ExecutionPayload: &enginev1.ExecutionPayload{
+					ParentHash:    make([]byte, fieldparams.RootLength),
+					FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
+					StateRoot:     make([]byte, fieldparams.RootLength),
+					ReceiptsRoot:  make([]byte, fieldparams.RootLength),
+					LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
+					PrevRandao:    make([]byte, fieldparams.RootLength),
+					BaseFeePerGas: make([]byte, fieldparams.RootLength),
+					BlockHash:     make([]byte, fieldparams.RootLength),
+				},
+			},
+		},
+		Signature: genesis.Signature,
+	}
+
+	blkRoot, err := blk.Block.HashTreeRoot()
+	require.NoError(t, err)
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
+
+	c := mockExecution.New()
+	c.HashesByHeight[0] = terminalBlockHash
+	random, err := helpers.RandaoMix(beaconState, slots.ToEpoch(beaconState.Slot()))
+	require.NoError(t, err)
+	timeStamp, err := slots.ToTime(beaconState.GenesisTime(), bellatrixSlot+1)
+	require.NoError(t, err)
+
+	payload := &enginev1.ExecutionPayload{
+		ParentHash:    make([]byte, fieldparams.RootLength),
+		FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
+		StateRoot:     make([]byte, fieldparams.RootLength),
+		ReceiptsRoot:  make([]byte, fieldparams.RootLength),
+		LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
+		PrevRandao:    random,
+		BaseFeePerGas: make([]byte, fieldparams.RootLength),
+		BlockHash:     make([]byte, fieldparams.RootLength),
+		Transactions:  make([][]byte, 0),
+		ExtraData:     make([]byte, 0),
+		BlockNumber:   1,
+		GasLimit:      2,
+		GasUsed:       3,
+		Timestamp:     uint64(timeStamp.Unix()),
+	}
+
+	proposerServer := getProposerServer(db, beaconState, parentRoot[:])
+	proposerServer.Eth1BlockFetcher = c
+	proposerServer.ExecutionEngineCaller = &mockExecution.EngineClient{
+		PayloadIDBytes:   &enginev1.PayloadIDBytes{1},
+		ExecutionPayload: payload,
+	}
+
+	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
+	require.NoError(t, err)
+
+	graffiti := bytesutil.ToBytes32([]byte("eth2"))
+	require.NoError(t, err)
+	req := &ethpb.BlockRequest{
+		Slot:         bellatrixSlot + 1,
+		RandaoReveal: randaoReveal,
+		Graffiti:     graffiti[:],
+	}
+
+	block, err := proposerServer.GetBeaconBlock(ctx, req)
+	require.NoError(t, err)
+	bellatrixBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Bellatrix)
+	require.Equal(t, true, ok)
+
+	assert.Equal(t, req.Slot, bellatrixBlk.Bellatrix.Slot)
+	assert.DeepEqual(t, parentRoot[:], bellatrixBlk.Bellatrix.ParentRoot, "Expected block to have correct parent root")
+	assert.DeepEqual(t, randaoReveal, bellatrixBlk.Bellatrix.Body.RandaoReveal, "Expected block to have correct randao reveal")
+	assert.DeepEqual(t, req.Graffiti, bellatrixBlk.Bellatrix.Body.Graffiti, "Expected block to have correct Graffiti")
+
+	require.LogsContain(t, hook, "Fee recipient is currently using the burn address")
+	require.DeepEqual(t, payload, bellatrixBlk.Bellatrix.Body.ExecutionPayload) // Payload should equal.
+
+	// Operator sets default fee recipient to not be burned through beacon node cli.
+	newHook := logTest.NewGlobal()
+	params.SetupTestConfigCleanup(t)
+	cfg = params.MinimalSpecConfig().Copy()
+	cfg.DefaultFeeRecipient = common.Address{'b'}
+	params.OverrideBeaconConfig(cfg)
+	_, err = proposerServer.GetBeaconBlock(ctx, req)
+	require.NoError(t, err)
+	require.LogsDoNotContain(t, newHook, "Fee recipient is currently using the burn address")
+}
+
+func TestServer_GetBeaconBlock_Capella(t *testing.T) {
+	db := dbutil.SetupDB(t)
+	ctx := context.Background()
+	transition.SkipSlotCache.Disable()
+
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.CapellaForkEpoch = 3
+	cfg.BellatrixForkEpoch = 2
+	cfg.AltairForkEpoch = 1
+	params.OverrideBeaconConfig(cfg)
+	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
+
+	stateRoot, err := beaconState.HashTreeRoot(ctx)
+	require.NoError(t, err, "Could not hash genesis state")
+
+	genesis := b.NewGenesisBlock(stateRoot[:])
+	util.SaveBlock(t, ctx, db, genesis)
+
+	parentRoot, err := genesis.Block.HashTreeRoot()
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
+
+	capellaSlot, err := slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	require.NoError(t, err)
+
+	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
+	blk := &ethpb.SignedBeaconBlockCapella{
+		Block: &ethpb.BeaconBlockCapella{
+			Slot:       capellaSlot + 1,
+			ParentRoot: parentRoot[:],
+			StateRoot:  genesis.Block.StateRoot,
+			Body: &ethpb.BeaconBlockBodyCapella{
+				RandaoReveal:  genesis.Block.Body.RandaoReveal,
+				Graffiti:      genesis.Block.Body.Graffiti,
+				Eth1Data:      genesis.Block.Body.Eth1Data,
+				SyncAggregate: &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
+				ExecutionPayload: &enginev1.ExecutionPayloadCapella{
+					ParentHash:    make([]byte, fieldparams.RootLength),
+					FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
+					StateRoot:     make([]byte, fieldparams.RootLength),
+					ReceiptsRoot:  make([]byte, fieldparams.RootLength),
+					LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
+					PrevRandao:    make([]byte, fieldparams.RootLength),
+					BaseFeePerGas: make([]byte, fieldparams.RootLength),
+					BlockHash:     make([]byte, fieldparams.RootLength),
+				},
+			},
+		},
+		Signature: genesis.Signature,
+	}
+
+	blkRoot, err := blk.Block.HashTreeRoot()
+	require.NoError(t, err)
+	require.NoError(t, err, "Could not get signing root")
+	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
+	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
+
+	random, err := helpers.RandaoMix(beaconState, slots.ToEpoch(beaconState.Slot()))
+	require.NoError(t, err)
+	timeStamp, err := slots.ToTime(beaconState.GenesisTime(), capellaSlot+1)
+	require.NoError(t, err)
+	payload := &enginev1.ExecutionPayloadCapella{
+		ParentHash:    make([]byte, fieldparams.RootLength),
+		FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
+		StateRoot:     make([]byte, fieldparams.RootLength),
+		ReceiptsRoot:  make([]byte, fieldparams.RootLength),
+		LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
+		PrevRandao:    random,
+		BaseFeePerGas: make([]byte, fieldparams.RootLength),
+		BlockHash:     make([]byte, fieldparams.RootLength),
+		Transactions:  make([][]byte, 0),
+		ExtraData:     make([]byte, 0),
+		BlockNumber:   1,
+		GasLimit:      2,
+		GasUsed:       3,
+		Timestamp:     uint64(timeStamp.Unix()),
+	}
+
+	proposerServer := getProposerServer(db, beaconState, parentRoot[:])
+	proposerServer.ExecutionEngineCaller = &mockExecution.EngineClient{
+		PayloadIDBytes:          &enginev1.PayloadIDBytes{1},
+		ExecutionPayloadCapella: payload,
+	}
+
+	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
+	require.NoError(t, err)
+
+	graffiti := bytesutil.ToBytes32([]byte("eth2"))
+	require.NoError(t, err)
+	req := &ethpb.BlockRequest{
+		Slot:         capellaSlot + 1,
+		RandaoReveal: randaoReveal,
+		Graffiti:     graffiti[:],
+	}
+
+	copiedState := beaconState.Copy()
+	copiedState, err = transition.ProcessSlots(ctx, copiedState, capellaSlot+1)
+	require.NoError(t, err)
+	change, err := util.GenerateBLSToExecutionChange(copiedState, privKeys[1], 0)
+	require.NoError(t, err)
+	proposerServer.BLSChangesPool.InsertBLSToExecChange(change)
+
+	got, err := proposerServer.GetBeaconBlock(ctx, req)
+	require.NoError(t, err)
+	require.Equal(t, 1, len(got.GetCapella().Body.BlsToExecutionChanges))
+	require.DeepEqual(t, change, got.GetCapella().Body.BlsToExecutionChanges[0])
+}
+
+func TestServer_GetBeaconBlock_Optimistic(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.BellatrixForkEpoch = 2
+	cfg.AltairForkEpoch = 1
+	params.OverrideBeaconConfig(cfg)
+
+	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
+	require.NoError(t, err)
+
+	proposerServer := &Server{
+		OptimisticModeFetcher: &mock.ChainService{Optimistic: true},
+		SyncChecker:           &mockSync.Sync{},
+		TimeFetcher:           &mock.ChainService{}}
+	req := &ethpb.BlockRequest{
+		Slot: bellatrixSlot + 1,
+	}
+	_, err = proposerServer.GetBeaconBlock(context.Background(), req)
+	s, ok := status.FromError(err)
+	require.Equal(t, true, ok)
+	require.DeepEqual(t, codes.Unavailable, s.Code())
+	require.ErrorContains(t, errOptimisticMode.Error(), err)
+}
+
+func getProposerServer(db db.HeadAccessDatabase, headState state.BeaconState, headRoot []byte) *Server {
+	return &Server{
+		HeadFetcher:           &mock.ChainService{State: headState, Root: headRoot},
+		SyncChecker:           &mockSync.Sync{IsSyncing: false},
+		BlockReceiver:         &mock.ChainService{},
+		HeadUpdater:           &mock.ChainService{},
+		ChainStartFetcher:     &mockExecution.Chain{},
+		Eth1InfoFetcher:       &mockExecution.Chain{},
+		Eth1BlockFetcher:      &mockExecution.Chain{},
+		MockEth1Votes:         true,
+		AttPool:               attestations.NewPool(),
+		SlashingsPool:         slashings.NewPool(),
+		ExitPool:              voluntaryexits.NewPool(),
+		StateGen:              stategen.New(db, doublylinkedtree.New()),
+		SyncCommitteePool:     synccommittee.NewStore(),
+		OptimisticModeFetcher: &mock.ChainService{},
+		TimeFetcher: &testutil.MockGenesisTimeFetcher{
+			Genesis: time.Now(),
+		},
+		ProposerSlotIndexCache: cache.NewProposerPayloadIDsCache(),
+		BeaconDB:               db,
+		BLSChangesPool:         blstoexec.NewPool(),
+	}
+}
+
+func injectSlashings(t *testing.T, st state.BeaconState, keys []bls.SecretKey, server *Server) ([]*ethpb.ProposerSlashing, []*ethpb.AttesterSlashing) {
+	proposerSlashings := make([]*ethpb.ProposerSlashing, params.BeaconConfig().MaxProposerSlashings)
+	for i := types.ValidatorIndex(0); uint64(i) < params.BeaconConfig().MaxProposerSlashings; i++ {
+		proposerSlashing, err := util.GenerateProposerSlashingForValidator(st, keys[i], i /* validator index */)
+		require.NoError(t, err)
+		proposerSlashings[i] = proposerSlashing
+		err = server.SlashingsPool.InsertProposerSlashing(context.Background(), st, proposerSlashing)
+		require.NoError(t, err)
+	}
+
+	attSlashings := make([]*ethpb.AttesterSlashing, params.BeaconConfig().MaxAttesterSlashings)
+	for i := uint64(0); i < params.BeaconConfig().MaxAttesterSlashings; i++ {
+		attesterSlashing, err := util.GenerateAttesterSlashingForValidator(st, keys[i+params.BeaconConfig().MaxProposerSlashings], types.ValidatorIndex(i+params.BeaconConfig().MaxProposerSlashings) /* validator index */)
+		require.NoError(t, err)
+		attSlashings[i] = attesterSlashing
+		err = server.SlashingsPool.InsertAttesterSlashing(context.Background(), st, attesterSlashing)
+		require.NoError(t, err)
+	}
+	return proposerSlashings, attSlashings
+}
+
 func TestProposer_ProposeBlock_OK(t *testing.T) {
 	tests := []struct {
 		name  string
@@ -1914,382 +2362,6 @@ func TestProposer_DeleteAttsInPool_Aggregated(t *testing.T) {
 	assert.Equal(t, 0, len(atts), "Did not delete unaggregated attestation")
 }
 
-func TestProposer_GetBeaconBlock_PreForkEpoch(t *testing.T) {
-	db := dbutil.SetupDB(t)
-	ctx := context.Background()
-
-	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
-	stateRoot, err := beaconState.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	genesis := b.NewGenesisBlock(stateRoot[:])
-	genBlk := &ethpb.SignedBeaconBlock{
-		Block: &ethpb.BeaconBlock{
-			Slot:       genesis.Block.Slot,
-			ParentRoot: genesis.Block.ParentRoot,
-			StateRoot:  genesis.Block.StateRoot,
-			Body: &ethpb.BeaconBlockBody{
-				RandaoReveal: genesis.Block.Body.RandaoReveal,
-				Graffiti:     genesis.Block.Body.Graffiti,
-				Eth1Data:     genesis.Block.Body.Eth1Data,
-			},
-		},
-		Signature: genesis.Signature,
-	}
-	util.SaveBlock(t, ctx, db, genBlk)
-
-	parentRoot, err := genBlk.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	proposerServer := &Server{
-		HeadFetcher:       &mock.ChainService{State: beaconState, Root: parentRoot[:]},
-		SyncChecker:       &mockSync.Sync{IsSyncing: false},
-		BlockReceiver:     &mock.ChainService{},
-		HeadUpdater:       &mock.ChainService{},
-		ChainStartFetcher: &mockExecution.Chain{},
-		Eth1InfoFetcher:   &mockExecution.Chain{},
-		Eth1BlockFetcher:  &mockExecution.Chain{},
-		MockEth1Votes:     true,
-		AttPool:           attestations.NewPool(),
-		SlashingsPool:     slashings.NewPool(),
-		ExitPool:          voluntaryexits.NewPool(),
-		StateGen:          stategen.New(db, doublylinkedtree.New()),
-		SyncCommitteePool: synccommittee.NewStore(),
-	}
-
-	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
-	require.NoError(t, err)
-
-	graffiti := bytesutil.ToBytes32([]byte("eth2"))
-	req := &ethpb.BlockRequest{
-		Slot:         1,
-		RandaoReveal: randaoReveal,
-		Graffiti:     graffiti[:],
-	}
-
-	proposerSlashings := make([]*ethpb.ProposerSlashing, params.BeaconConfig().MaxProposerSlashings)
-	for i := types.ValidatorIndex(0); uint64(i) < params.BeaconConfig().MaxProposerSlashings; i++ {
-		proposerSlashing, err := util.GenerateProposerSlashingForValidator(
-			beaconState,
-			privKeys[i],
-			i, /* validator index */
-		)
-		require.NoError(t, err)
-		proposerSlashings[i] = proposerSlashing
-		err = proposerServer.SlashingsPool.InsertProposerSlashing(context.Background(), beaconState, proposerSlashing)
-		require.NoError(t, err)
-	}
-
-	attSlashings := make([]*ethpb.AttesterSlashing, params.BeaconConfig().MaxAttesterSlashings)
-	for i := uint64(0); i < params.BeaconConfig().MaxAttesterSlashings; i++ {
-		attesterSlashing, err := util.GenerateAttesterSlashingForValidator(
-			beaconState,
-			privKeys[i+params.BeaconConfig().MaxProposerSlashings],
-			types.ValidatorIndex(i+params.BeaconConfig().MaxProposerSlashings), /* validator index */
-		)
-		require.NoError(t, err)
-		attSlashings[i] = attesterSlashing
-		err = proposerServer.SlashingsPool.InsertAttesterSlashing(context.Background(), beaconState, attesterSlashing)
-		require.NoError(t, err)
-	}
-	block, err := proposerServer.GetBeaconBlock(ctx, req)
-	require.NoError(t, err)
-	phase0Blk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Phase0)
-	require.Equal(t, true, ok)
-
-	assert.Equal(t, req.Slot, phase0Blk.Phase0.Slot)
-	assert.DeepEqual(t, parentRoot[:], phase0Blk.Phase0.ParentRoot, "Expected block to have correct parent root")
-	assert.DeepEqual(t, randaoReveal, phase0Blk.Phase0.Body.RandaoReveal, "Expected block to have correct randao reveal")
-	assert.DeepEqual(t, req.Graffiti, phase0Blk.Phase0.Body.Graffiti, "Expected block to have correct Graffiti")
-	assert.Equal(t, params.BeaconConfig().MaxProposerSlashings, uint64(len(phase0Blk.Phase0.Body.ProposerSlashings)))
-	assert.DeepEqual(t, proposerSlashings, phase0Blk.Phase0.Body.ProposerSlashings)
-	assert.Equal(t, params.BeaconConfig().MaxAttesterSlashings, uint64(len(phase0Blk.Phase0.Body.AttesterSlashings)))
-	assert.DeepEqual(t, attSlashings, phase0Blk.Phase0.Body.AttesterSlashings)
-}
-
-func TestProposer_GetBeaconBlock_PostForkEpoch(t *testing.T) {
-	db := dbutil.SetupDB(t)
-	ctx := context.Background()
-
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.AltairForkEpoch = 1
-	params.OverrideBeaconConfig(cfg)
-	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
-
-	stateRoot, err := beaconState.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	genesis := b.NewGenesisBlock(stateRoot[:])
-	util.SaveBlock(t, ctx, db, genesis)
-
-	parentRoot, err := genesis.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	altairSlot, err := slots.EpochStart(params.BeaconConfig().AltairForkEpoch)
-	require.NoError(t, err)
-
-	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
-	genAltair := &ethpb.SignedBeaconBlockAltair{
-		Block: &ethpb.BeaconBlockAltair{
-			Slot:       altairSlot + 1,
-			ParentRoot: parentRoot[:],
-			StateRoot:  genesis.Block.StateRoot,
-			Body: &ethpb.BeaconBlockBodyAltair{
-				RandaoReveal:  genesis.Block.Body.RandaoReveal,
-				Graffiti:      genesis.Block.Body.Graffiti,
-				Eth1Data:      genesis.Block.Body.Eth1Data,
-				SyncAggregate: &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
-			},
-		},
-		Signature: genesis.Signature,
-	}
-
-	blkRoot, err := genAltair.Block.HashTreeRoot()
-	require.NoError(t, err)
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
-
-	proposerServer := &Server{
-		HeadFetcher:       &mock.ChainService{State: beaconState, Root: parentRoot[:]},
-		SyncChecker:       &mockSync.Sync{IsSyncing: false},
-		BlockReceiver:     &mock.ChainService{},
-		HeadUpdater:       &mock.ChainService{},
-		ChainStartFetcher: &mockExecution.Chain{},
-		Eth1InfoFetcher:   &mockExecution.Chain{},
-		Eth1BlockFetcher:  &mockExecution.Chain{},
-		MockEth1Votes:     true,
-		AttPool:           attestations.NewPool(),
-		SlashingsPool:     slashings.NewPool(),
-		ExitPool:          voluntaryexits.NewPool(),
-		StateGen:          stategen.New(db, doublylinkedtree.New()),
-		SyncCommitteePool: synccommittee.NewStore(),
-	}
-
-	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
-	require.NoError(t, err)
-
-	graffiti := bytesutil.ToBytes32([]byte("eth2"))
-	require.NoError(t, err)
-	req := &ethpb.BlockRequest{
-		Slot:         altairSlot + 1,
-		RandaoReveal: randaoReveal,
-		Graffiti:     graffiti[:],
-	}
-
-	proposerSlashings := make([]*ethpb.ProposerSlashing, params.BeaconConfig().MaxProposerSlashings)
-	for i := types.ValidatorIndex(0); uint64(i) < params.BeaconConfig().MaxProposerSlashings; i++ {
-		proposerSlashing, err := util.GenerateProposerSlashingForValidator(
-			beaconState,
-			privKeys[i],
-			i, /* validator index */
-		)
-		require.NoError(t, err)
-		proposerSlashings[i] = proposerSlashing
-		err = proposerServer.SlashingsPool.InsertProposerSlashing(context.Background(), beaconState, proposerSlashing)
-		require.NoError(t, err)
-	}
-
-	attSlashings := make([]*ethpb.AttesterSlashing, params.BeaconConfig().MaxAttesterSlashings)
-	for i := uint64(0); i < params.BeaconConfig().MaxAttesterSlashings; i++ {
-		attesterSlashing, err := util.GenerateAttesterSlashingForValidator(
-			beaconState,
-			privKeys[i+params.BeaconConfig().MaxProposerSlashings],
-			types.ValidatorIndex(i+params.BeaconConfig().MaxProposerSlashings), /* validator index */
-		)
-		require.NoError(t, err)
-		attSlashings[i] = attesterSlashing
-		err = proposerServer.SlashingsPool.InsertAttesterSlashing(context.Background(), beaconState, attesterSlashing)
-		require.NoError(t, err)
-	}
-	block, err := proposerServer.GetBeaconBlock(ctx, req)
-	require.NoError(t, err)
-	altairBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Altair)
-	require.Equal(t, true, ok)
-
-	assert.Equal(t, req.Slot, altairBlk.Altair.Slot)
-	assert.DeepEqual(t, parentRoot[:], altairBlk.Altair.ParentRoot, "Expected block to have correct parent root")
-	assert.DeepEqual(t, randaoReveal, altairBlk.Altair.Body.RandaoReveal, "Expected block to have correct randao reveal")
-	assert.DeepEqual(t, req.Graffiti, altairBlk.Altair.Body.Graffiti, "Expected block to have correct Graffiti")
-	assert.Equal(t, params.BeaconConfig().MaxProposerSlashings, uint64(len(altairBlk.Altair.Body.ProposerSlashings)))
-	assert.DeepEqual(t, proposerSlashings, altairBlk.Altair.Body.ProposerSlashings)
-	assert.Equal(t, params.BeaconConfig().MaxAttesterSlashings, uint64(len(altairBlk.Altair.Body.AttesterSlashings)))
-	assert.DeepEqual(t, attSlashings, altairBlk.Altair.Body.AttesterSlashings)
-}
-
-func TestProposer_GetBeaconBlock_BellatrixEpoch(t *testing.T) {
-	db := dbutil.SetupDB(t)
-	ctx := context.Background()
-	hook := logTest.NewGlobal()
-
-	terminalBlockHash := bytesutil.PadTo([]byte{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-		0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 32)
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.BellatrixForkEpoch = 2
-	cfg.AltairForkEpoch = 1
-	cfg.TerminalBlockHash = common.BytesToHash(terminalBlockHash)
-	cfg.TerminalBlockHashActivationEpoch = 2
-	params.OverrideBeaconConfig(cfg)
-	beaconState, privKeys := util.DeterministicGenesisState(t, 64)
-
-	stateRoot, err := beaconState.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	genesis := b.NewGenesisBlock(stateRoot[:])
-	util.SaveBlock(t, ctx, db, genesis)
-
-	parentRoot, err := genesis.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, parentRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
-	require.NoError(t, err)
-
-	var scBits [fieldparams.SyncAggregateSyncCommitteeBytesLength]byte
-	blk := &ethpb.SignedBeaconBlockBellatrix{
-		Block: &ethpb.BeaconBlockBellatrix{
-			Slot:       bellatrixSlot + 1,
-			ParentRoot: parentRoot[:],
-			StateRoot:  genesis.Block.StateRoot,
-			Body: &ethpb.BeaconBlockBodyBellatrix{
-				RandaoReveal:  genesis.Block.Body.RandaoReveal,
-				Graffiti:      genesis.Block.Body.Graffiti,
-				Eth1Data:      genesis.Block.Body.Eth1Data,
-				SyncAggregate: &ethpb.SyncAggregate{SyncCommitteeBits: scBits[:], SyncCommitteeSignature: make([]byte, 96)},
-				ExecutionPayload: &enginev1.ExecutionPayload{
-					ParentHash:    make([]byte, fieldparams.RootLength),
-					FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
-					StateRoot:     make([]byte, fieldparams.RootLength),
-					ReceiptsRoot:  make([]byte, fieldparams.RootLength),
-					LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
-					PrevRandao:    make([]byte, fieldparams.RootLength),
-					BaseFeePerGas: make([]byte, fieldparams.RootLength),
-					BlockHash:     make([]byte, fieldparams.RootLength),
-				},
-			},
-		},
-		Signature: genesis.Signature,
-	}
-
-	blkRoot, err := blk.Block.HashTreeRoot()
-	require.NoError(t, err)
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, db.SaveState(ctx, beaconState, blkRoot), "Could not save genesis state")
-	require.NoError(t, db.SaveHeadBlockRoot(ctx, blkRoot), "Could not save genesis state")
-
-	c := mockExecution.New()
-	c.HashesByHeight[0] = terminalBlockHash
-	random, err := helpers.RandaoMix(beaconState, slots.ToEpoch(beaconState.Slot()))
-	require.NoError(t, err)
-	timeStamp, err := slots.ToTime(beaconState.GenesisTime(), bellatrixSlot+1)
-	require.NoError(t, err)
-
-	payload := &enginev1.ExecutionPayload{
-		ParentHash:    make([]byte, fieldparams.RootLength),
-		FeeRecipient:  make([]byte, fieldparams.FeeRecipientLength),
-		StateRoot:     make([]byte, fieldparams.RootLength),
-		ReceiptsRoot:  make([]byte, fieldparams.RootLength),
-		LogsBloom:     make([]byte, fieldparams.LogsBloomLength),
-		PrevRandao:    random,
-		BaseFeePerGas: make([]byte, fieldparams.RootLength),
-		BlockHash:     make([]byte, fieldparams.RootLength),
-		Transactions:  make([][]byte, 0),
-		ExtraData:     make([]byte, 0),
-		BlockNumber:   1,
-		GasLimit:      2,
-		GasUsed:       3,
-		Timestamp:     uint64(timeStamp.Unix()),
-	}
-	proposerServer := &Server{
-		HeadFetcher:       &mock.ChainService{State: beaconState, Root: parentRoot[:], Optimistic: false},
-		TimeFetcher:       &mock.ChainService{Genesis: time.Now()},
-		SyncChecker:       &mockSync.Sync{IsSyncing: false},
-		BlockReceiver:     &mock.ChainService{},
-		HeadUpdater:       &mock.ChainService{},
-		ChainStartFetcher: &mockExecution.Chain{},
-		Eth1InfoFetcher:   &mockExecution.Chain{},
-		Eth1BlockFetcher:  c,
-		MockEth1Votes:     true,
-		AttPool:           attestations.NewPool(),
-		SlashingsPool:     slashings.NewPool(),
-		ExitPool:          voluntaryexits.NewPool(),
-		StateGen:          stategen.New(db, doublylinkedtree.New()),
-		SyncCommitteePool: synccommittee.NewStore(),
-		ExecutionEngineCaller: &mockExecution.EngineClient{
-			PayloadIDBytes:   &enginev1.PayloadIDBytes{1},
-			ExecutionPayload: payload,
-		},
-		BeaconDB:               db,
-		ProposerSlotIndexCache: cache.NewProposerPayloadIDsCache(),
-	}
-
-	randaoReveal, err := util.RandaoReveal(beaconState, 0, privKeys)
-	require.NoError(t, err)
-
-	graffiti := bytesutil.ToBytes32([]byte("eth2"))
-	require.NoError(t, err)
-	req := &ethpb.BlockRequest{
-		Slot:         bellatrixSlot + 1,
-		RandaoReveal: randaoReveal,
-		Graffiti:     graffiti[:],
-	}
-
-	block, err := proposerServer.GetBeaconBlock(ctx, req)
-	require.NoError(t, err)
-	bellatrixBlk, ok := block.GetBlock().(*ethpb.GenericBeaconBlock_Bellatrix)
-	require.Equal(t, true, ok)
-
-	assert.Equal(t, req.Slot, bellatrixBlk.Bellatrix.Slot)
-	assert.DeepEqual(t, parentRoot[:], bellatrixBlk.Bellatrix.ParentRoot, "Expected block to have correct parent root")
-	assert.DeepEqual(t, randaoReveal, bellatrixBlk.Bellatrix.Body.RandaoReveal, "Expected block to have correct randao reveal")
-	assert.DeepEqual(t, req.Graffiti, bellatrixBlk.Bellatrix.Body.Graffiti, "Expected block to have correct Graffiti")
-
-	require.LogsContain(t, hook, "Fee recipient is currently using the burn address")
-	require.DeepEqual(t, payload, bellatrixBlk.Bellatrix.Body.ExecutionPayload) // Payload should equal.
-
-	// Operator sets default fee recipient to not be burned through beacon node cli.
-	newHook := logTest.NewGlobal()
-	params.SetupTestConfigCleanup(t)
-	cfg = params.MinimalSpecConfig().Copy()
-	cfg.DefaultFeeRecipient = common.Address{'b'}
-	params.OverrideBeaconConfig(cfg)
-	_, err = proposerServer.GetBeaconBlock(ctx, req)
-	require.NoError(t, err)
-	require.LogsDoNotContain(t, newHook, "Fee recipient is currently using the burn address")
-}
-
-func TestProposer_GetBeaconBlock_Optimistic(t *testing.T) {
-	params.SetupTestConfigCleanup(t)
-	cfg := params.BeaconConfig().Copy()
-	cfg.BellatrixForkEpoch = 2
-	cfg.AltairForkEpoch = 1
-	params.OverrideBeaconConfig(cfg)
-
-	bellatrixSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
-	require.NoError(t, err)
-
-	proposerServer := &Server{OptimisticModeFetcher: &mock.ChainService{Optimistic: true}, TimeFetcher: &mock.ChainService{}}
-	req := &ethpb.BlockRequest{
-		Slot: bellatrixSlot + 1,
-	}
-	_, err = proposerServer.GetBeaconBlock(context.Background(), req)
-	s, ok := status.FromError(err)
-	require.Equal(t, true, ok)
-	require.DeepEqual(t, codes.Unavailable, s.Code())
-	require.ErrorContains(t, errOptimisticMode.Error(), err)
-}
-
 func TestProposer_GetSyncAggregate_OK(t *testing.T) {
 	proposerServer := &Server{
 		SyncChecker:       &mockSync.Sync{IsSyncing: false},

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

@@ -20,6 +20,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/slashings"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/synccommittee"
 	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits"
@@ -72,6 +73,7 @@ type Server struct {
 	BeaconDB               db.HeadAccessDatabase
 	ExecutionEngineCaller  execution.EngineCaller
 	BlockBuilder           builder.BlockBuilder
+	BLSChangesPool         blstoexec.PoolManager
 }
 
 // WaitForActivation checks if a validator public key exists in the active validator registry of the current

beacon-chain/rpc/service.go

@@ -223,6 +223,7 @@ func (s *Service) Start() {
 		BeaconDB:               s.cfg.BeaconDB,
 		ProposerSlotIndexCache: s.cfg.ProposerIdsCache,
 		BlockBuilder:           s.cfg.BlockBuilder,
+		BLSChangesPool:         s.cfg.BLSChangesPool,
 	}
 	validatorServerV1 := &validator.Server{
 		HeadFetcher:           s.cfg.HeadFetcher,

beacon-chain/rpc/statefetcher/BUILD.bazel

@@ -14,6 +14,7 @@ go_library(
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//time/slots:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@io_opencensus_go//trace:go_default_library",
     ],

beacon-chain/rpc/statefetcher/fetcher.go

@@ -16,6 +16,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v3/time/slots"
 	"go.opencensus.io/trace"
 )
 
@@ -113,13 +114,29 @@ func (p *StateProvider) State(ctx context.Context, stateId []byte) (state.Beacon
 		}
 	case "finalized":
 		checkpoint := p.ChainInfoFetcher.FinalizedCheckpt()
-		s, err = p.StateGenService.StateByRoot(ctx, bytesutil.ToBytes32(checkpoint.Root))
+		targetSlot, err := slots.EpochStart(checkpoint.Epoch)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get start slot")
+		}
+		// We use the stategen replayer to fetch the finalized state and then
+		// replay it to the start slot of our checkpoint's epoch. The replayer
+		// only ever accesses our canonical history, so the state retrieved will
+		// always be the finalized state at that epoch.
+		s, err = p.ReplayerBuilder.ReplayerForSlot(targetSlot).ReplayToSlot(ctx, targetSlot)
 		if err != nil {
 			return nil, errors.Wrap(err, "could not get finalized state")
 		}
 	case "justified":
 		checkpoint := p.ChainInfoFetcher.CurrentJustifiedCheckpt()
-		s, err = p.StateGenService.StateByRoot(ctx, bytesutil.ToBytes32(checkpoint.Root))
+		targetSlot, err := slots.EpochStart(checkpoint.Epoch)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not get start slot")
+		}
+		// We use the stategen replayer to fetch the justified state and then
+		// replay it to the start slot of our checkpoint's epoch. The replayer
+		// only ever accesses our canonical history, so the state retrieved will
+		// always be the justified state at that epoch.
+		s, err = p.ReplayerBuilder.ReplayerForSlot(targetSlot).ReplayToSlot(ctx, targetSlot)
 		if err != nil {
 			return nil, errors.Wrap(err, "could not get justified state")
 		}
@@ -203,9 +220,6 @@ func (p *StateProvider) StateBySlot(ctx context.Context, target types.Slot) (sta
 	if target > p.GenesisTimeFetcher.CurrentSlot() {
 		return nil, errors.New("requested slot is in the future")
 	}
-	if target > p.ChainInfoFetcher.HeadSlot() {
-		return nil, errors.New("requested slot number is higher than head slot number")
-	}
 
 	st, err := p.ReplayerBuilder.ReplayerForSlot(target).ReplayBlocks(ctx)
 	if err != nil {

beacon-chain/rpc/statefetcher/fetcher_test.go

@@ -94,15 +94,19 @@ func TestGetState(t *testing.T) {
 
 	t.Run("finalized", func(t *testing.T) {
 		stateGen := mockstategen.NewMockService()
+		replayer := mockstategen.NewMockReplayerBuilder()
+		replayer.SetMockStateForSlot(newBeaconState, params.BeaconConfig().SlotsPerEpoch*10)
 		stateGen.StatesByRoot[stateRoot] = newBeaconState
 
 		p := StateProvider{
 			ChainInfoFetcher: &chainMock.ChainService{
 				FinalizedCheckPoint: &ethpb.Checkpoint{
-					Root: stateRoot[:],
+					Root:  stateRoot[:],
+					Epoch: 10,
 				},
 			},
 			StateGenService: stateGen,
+			ReplayerBuilder: replayer,
 		}
 
 		s, err := p.State(ctx, []byte("finalized"))
@@ -114,15 +118,19 @@ func TestGetState(t *testing.T) {
 
 	t.Run("justified", func(t *testing.T) {
 		stateGen := mockstategen.NewMockService()
+		replayer := mockstategen.NewMockReplayerBuilder()
+		replayer.SetMockStateForSlot(newBeaconState, params.BeaconConfig().SlotsPerEpoch*10)
 		stateGen.StatesByRoot[stateRoot] = newBeaconState
 
 		p := StateProvider{
 			ChainInfoFetcher: &chainMock.ChainService{
 				CurrentJustifiedCheckPoint: &ethpb.Checkpoint{
-					Root: stateRoot[:],
+					Root:  stateRoot[:],
+					Epoch: 10,
 				},
 			},
 			StateGenService: stateGen,
+			ReplayerBuilder: replayer,
 		}
 
 		s, err := p.State(ctx, []byte("justified"))
@@ -387,11 +395,16 @@ func TestStateBySlot_FutureSlot(t *testing.T) {
 }
 
 func TestStateBySlot_AfterHeadSlot(t *testing.T) {
-	st, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: 100})
+	headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: 100})
+	require.NoError(t, err)
+	slotSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: 101})
 	require.NoError(t, err)
 	currentSlot := types.Slot(102)
-	mock := &chainMock.ChainService{State: st, Slot: &currentSlot}
-	p := StateProvider{ChainInfoFetcher: mock, GenesisTimeFetcher: mock}
-	_, err = p.StateBySlot(context.Background(), 101)
-	assert.ErrorContains(t, "requested slot number is higher than head slot number", err)
+	mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+	mockReplayer := mockstategen.NewMockReplayerBuilder()
+	mockReplayer.SetMockStateForSlot(slotSt, 101)
+	p := StateProvider{ChainInfoFetcher: mock, GenesisTimeFetcher: mock, ReplayerBuilder: mockReplayer}
+	st, err := p.StateBySlot(context.Background(), 101)
+	require.NoError(t, err)
+	assert.Equal(t, types.Slot(101), st.Slot())
 }

beacon-chain/state/interfaces.go

@@ -18,11 +18,9 @@ import (
 type BeaconState interface {
 	SpecParametersProvider
 	ReadOnlyBeaconState
-	ReadOnlyWithdrawals
 	WriteOnlyBeaconState
 	Copy() BeaconState
 	HashTreeRoot(ctx context.Context) ([32]byte, error)
-	FutureForkStub
 	StateProver
 }
 
@@ -50,6 +48,10 @@ type ReadOnlyBeaconState interface {
 	ReadOnlyBalances
 	ReadOnlyCheckpoint
 	ReadOnlyAttestations
+	ReadOnlyWithdrawals
+	ReadOnlyParticipation
+	ReadOnlyInactivity
+	ReadOnlySyncCommittee
 	ToProtoUnsafe() interface{}
 	ToProto() interface{}
 	GenesisTime() uint64
@@ -57,7 +59,8 @@ type ReadOnlyBeaconState interface {
 	Slot() types.Slot
 	Fork() *ethpb.Fork
 	LatestBlockHeader() *ethpb.BeaconBlockHeader
-	HistoricalRoots() [][]byte
+	HistoricalRoots() ([][]byte, error)
+	HistoricalSummaries() ([]*ethpb.HistoricalSummary, error)
 	Slashings() []uint64
 	FieldReferencesCount() map[string]uint64
 	MarshalSSZ() ([]byte, error)
@@ -76,6 +79,9 @@ type WriteOnlyBeaconState interface {
 	WriteOnlyBalances
 	WriteOnlyCheckpoint
 	WriteOnlyAttestations
+	WriteOnlyParticipation
+	WriteOnlyInactivity
+	WriteOnlySyncCommittee
 	SetGenesisTime(val uint64) error
 	SetGenesisValidatorsRoot(val []byte) error
 	SetSlot(val types.Slot) error
@@ -85,6 +91,7 @@ type WriteOnlyBeaconState interface {
 	SetSlashings(val []uint64) error
 	UpdateSlashingsAtIndex(idx, val uint64) error
 	AppendHistoricalRoots(root [32]byte) error
+	AppendHistoricalSummaries(*ethpb.HistoricalSummary) error
 	SetLatestExecutionPayloadHeader(payload interfaces.ExecutionData) error
 	SetNextWithdrawalIndex(i uint64) error
 	SetNextWithdrawalValidatorIndex(i types.ValidatorIndex) error
@@ -133,6 +140,7 @@ type ReadOnlyCheckpoint interface {
 	FinalizedCheckpoint() *ethpb.Checkpoint
 	FinalizedCheckpointEpoch() types.Epoch
 	JustificationBits() bitfield.Bitvector4
+	UnrealizedCheckpointBalances() (uint64, uint64, uint64, error)
 }
 
 // ReadOnlyBlockRoots defines a struct which only has read access to block roots methods.
@@ -174,6 +182,23 @@ type ReadOnlyWithdrawals interface {
 	NextWithdrawalIndex() (uint64, error)
 }
 
+// ReadOnlyParticipation defines a struct which only has read access to participation methods.
+type ReadOnlyParticipation interface {
+	CurrentEpochParticipation() ([]byte, error)
+	PreviousEpochParticipation() ([]byte, error)
+}
+
+// ReadOnlyInactivity defines a struct which only has read access to inactivity methods.
+type ReadOnlyInactivity interface {
+	InactivityScores() ([]uint64, error)
+}
+
+// ReadOnlySyncCommittee defines a struct which only has read access to sync committee methods.
+type ReadOnlySyncCommittee interface {
+	CurrentSyncCommittee() (*ethpb.SyncCommittee, error)
+	NextSyncCommittee() (*ethpb.SyncCommittee, error)
+}
+
 // WriteOnlyBlockRoots defines a struct which only has write access to block roots methods.
 type WriteOnlyBlockRoots interface {
 	SetBlockRoots(val [][]byte) error
@@ -232,23 +257,24 @@ type WriteOnlyAttestations interface {
 	RotateAttestations() error
 }
 
-// FutureForkStub defines methods that are used for future forks. This is a low cost solution to enable
-// various state casting of interface to work.
-type FutureForkStub interface {
+// WriteOnlyParticipation defines a struct which only has write access to participation methods.
+type WriteOnlyParticipation interface {
 	AppendCurrentParticipationBits(val byte) error
 	AppendPreviousParticipationBits(val byte) error
-	AppendInactivityScore(s uint64) error
-	CurrentEpochParticipation() ([]byte, error)
-	PreviousEpochParticipation() ([]byte, error)
-	UnrealizedCheckpointBalances() (uint64, uint64, uint64, error)
-	InactivityScores() ([]uint64, error)
-	SetInactivityScores(val []uint64) error
-	CurrentSyncCommittee() (*ethpb.SyncCommittee, error)
-	SetCurrentSyncCommittee(val *ethpb.SyncCommittee) error
 	SetPreviousParticipationBits(val []byte) error
 	SetCurrentParticipationBits(val []byte) error
 	ModifyCurrentParticipationBits(func(val []byte) ([]byte, error)) error
 	ModifyPreviousParticipationBits(func(val []byte) ([]byte, error)) error
-	NextSyncCommittee() (*ethpb.SyncCommittee, error)
+}
+
+// WriteOnlyInactivity defines a struct which only has write access to inactivity methods.
+type WriteOnlyInactivity interface {
+	AppendInactivityScore(s uint64) error
+	SetInactivityScores(val []uint64) error
+}
+
+// WriteOnlySyncCommittee defines a struct which only has write access to sync committee methods.
+type WriteOnlySyncCommittee interface {
+	SetCurrentSyncCommittee(val *ethpb.SyncCommittee) error
 	SetNextSyncCommittee(val *ethpb.SyncCommittee) error
 }

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

@@ -27,6 +27,7 @@ type BeaconState struct {
 	blockRoots                          *customtypes.BlockRoots
 	stateRoots                          *customtypes.StateRoots
 	historicalRoots                     customtypes.HistoricalRoots
+	historicalSummaries                 []*ethpb.HistoricalSummary
 	eth1Data                            *ethpb.Eth1Data
 	eth1DataVotes                       []*ethpb.Eth1Data
 	eth1DepositIndex                    uint64

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

@@ -27,6 +27,7 @@ type BeaconState struct {
 	blockRoots                          *customtypes.BlockRoots
 	stateRoots                          *customtypes.StateRoots
 	historicalRoots                     customtypes.HistoricalRoots
+	historicalSummaries                 []*ethpb.HistoricalSummary
 	eth1Data                            *ethpb.Eth1Data
 	eth1DataVotes                       []*ethpb.Eth1Data
 	eth1DepositIndex                    uint64

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

@@ -3,6 +3,7 @@ package state_native
 import (
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v3/runtime/version"
 )
 
 // GenesisTime of the beacon state as a uint64.
@@ -67,15 +68,15 @@ func (b *BeaconState) forkVal() *ethpb.Fork {
 }
 
 // HistoricalRoots based on epochs stored in the beacon state.
-func (b *BeaconState) HistoricalRoots() [][]byte {
+func (b *BeaconState) HistoricalRoots() ([][]byte, error) {
 	if b.historicalRoots == nil {
-		return nil
+		return nil, nil
 	}
 
 	b.lock.RLock()
 	defer b.lock.RUnlock()
 
-	return b.historicalRoots.Slice()
+	return b.historicalRoots.Slice(), nil
 }
 
 // balancesLength returns the length of the balances slice.
@@ -87,3 +88,25 @@ func (b *BeaconState) balancesLength() int {
 
 	return len(b.balances)
 }
+
+// HistoricalSummaries of the beacon state.
+func (b *BeaconState) HistoricalSummaries() ([]*ethpb.HistoricalSummary, error) {
+	if b.version < version.Capella {
+		return nil, errNotSupported("HistoricalSummaries", b.version)
+	}
+
+	if b.historicalSummaries == nil {
+		return nil, nil
+	}
+
+	b.lock.RLock()
+	defer b.lock.RUnlock()
+
+	return b.historicalSummariesVal(), nil
+}
+
+// historicalSummariesVal of the beacon state.
+// This assumes that a lock is already held on BeaconState.
+func (b *BeaconState) historicalSummariesVal() []*ethpb.HistoricalSummary {
+	return ethpb.CopyHistoricalSummaries(b.historicalSummaries)
+}

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

@@ -126,6 +126,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			LatestExecutionPayloadHeader: b.latestExecutionPayloadHeaderCapella,
 			NextWithdrawalIndex:          b.nextWithdrawalIndex,
 			NextWithdrawalValidatorIndex: b.nextWithdrawalValidatorIndex,
+			HistoricalSummaries:          b.historicalSummaries,
 		}
 	default:
 		return nil
@@ -252,6 +253,7 @@ func (b *BeaconState) ToProto() interface{} {
 			LatestExecutionPayloadHeader: b.latestExecutionPayloadHeaderCapellaVal(),
 			NextWithdrawalIndex:          b.nextWithdrawalIndex,
 			NextWithdrawalValidatorIndex: b.nextWithdrawalValidatorIndex,
+			HistoricalSummaries:          b.historicalSummariesVal(),
 		}
 	default:
 		return nil

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

@@ -255,6 +255,13 @@ func ComputeFieldRootsWithHasher(ctx context.Context, state *BeaconState) ([][]b
 		nextWithdrawalValidatorIndexRoot := make([]byte, 32)
 		binary.LittleEndian.PutUint64(nextWithdrawalValidatorIndexRoot, uint64(state.nextWithdrawalValidatorIndex))
 		fieldRoots[nativetypes.NextWithdrawalValidatorIndex.RealPosition()] = nextWithdrawalValidatorIndexRoot
+
+		// Historical summary root.
+		historicalSummaryRoot, err := stateutil.HistoricalSummariesRoot(state.historicalSummaries)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not compute historical summary merkleization")
+		}
+		fieldRoots[nativetypes.HistoricalSummaries.RealPosition()] = historicalSummaryRoot[:]
 	}
 
 	return fieldRoots, nil

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

@@ -258,6 +258,10 @@ func TestComputeFieldRootsWithHasher_Capella(t *testing.T) {
 	require.NoError(t, beaconState.SetLatestExecutionPayloadHeader(wrappedHeader))
 	require.NoError(t, beaconState.SetNextWithdrawalIndex(123))
 	require.NoError(t, beaconState.SetNextWithdrawalValidatorIndex(123))
+	require.NoError(t, beaconState.AppendHistoricalSummaries(&ethpb.HistoricalSummary{
+		BlockSummaryRoot: bytesutil.PadTo([]byte("block summary root"), 32),
+		StateSummaryRoot: bytesutil.PadTo([]byte("state summary root"), 32),
+	}))
 
 	nativeState, ok := beaconState.(*statenative.BeaconState)
 	require.Equal(t, true, ok)
@@ -298,6 +302,7 @@ func TestComputeFieldRootsWithHasher_Capella(t *testing.T) {
 		{0x39, 0x29, 0x16, 0xe8, 0x5a, 0xd2, 0xb, 0xbb, 0x1f, 0xef, 0x6a, 0xe0, 0x2d, 0xa6, 0x6a, 0x46, 0x81, 0xba, 0xcf, 0x86, 0xfc, 0x16, 0x22, 0x2a, 0x9b, 0x72, 0x96, 0x71, 0x2b, 0xc7, 0x5b, 0x9d},
 		{0x7b, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
 		{0x7b, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
+		{0xa1, 0x4, 0x64, 0x31, 0x2a, 0xa, 0x49, 0x31, 0x1c, 0x1, 0x41, 0x17, 0xc0, 0x52, 0x52, 0xfa, 0x4c, 0xf4, 0x95, 0x4f, 0x5c, 0xb0, 0x5a, 0x40, 0xc1, 0x32, 0x39, 0xc3, 0x7c, 0xb7, 0x2c, 0x27},
 	}
 	assert.DeepEqual(t, expected, root)
 }

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

@@ -9,6 +9,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v3/crypto/hash"
 	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
 	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v3/runtime/version"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -106,11 +107,15 @@ func (b *BeaconState) SetHistoricalRoots(val [][]byte) error {
 }
 
 // AppendHistoricalRoots for the beacon state. Appends the new value
-// to the the end of list.
+// to the end of list.
 func (b *BeaconState) AppendHistoricalRoots(root [32]byte) error {
 	b.lock.Lock()
 	defer b.lock.Unlock()
 
+	if b.version > version.Bellatrix {
+		return errNotSupported("AppendHistoricalRoots", b.version)
+	}
+
 	roots := b.historicalRoots
 	if b.sharedFieldReferences[nativetypes.HistoricalRoots].Refs() > 1 {
 		roots = make([][32]byte, len(b.historicalRoots))
@@ -124,6 +129,29 @@ func (b *BeaconState) AppendHistoricalRoots(root [32]byte) error {
 	return nil
 }
 
+// AppendHistoricalSummaries for the beacon state. Appends the new value
+// to the end of list.
+func (b *BeaconState) AppendHistoricalSummaries(summary *ethpb.HistoricalSummary) error {
+	b.lock.Lock()
+	defer b.lock.Unlock()
+
+	if b.version < version.Capella {
+		return errNotSupported("AppendHistoricalSummaries", b.version)
+	}
+
+	summaries := b.historicalSummaries
+	if b.sharedFieldReferences[nativetypes.HistoricalSummaries].Refs() > 1 {
+		summaries = make([]*ethpb.HistoricalSummary, len(b.historicalSummaries))
+		copy(summaries, b.historicalSummaries)
+		b.sharedFieldReferences[nativetypes.HistoricalSummaries].MinusRef()
+		b.sharedFieldReferences[nativetypes.HistoricalSummaries] = stateutil.NewRef(1)
+	}
+
+	b.historicalSummaries = append(summaries, summary)
+	b.markFieldAsDirty(nativetypes.HistoricalSummaries)
+	return nil
+}
+
 // Recomputes the branch up the index in the Merkle trie representation
 // of the beacon state. This method performs slice reads and the caller MUST
 // hold the lock before calling this method.

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

@@ -82,13 +82,14 @@ var capellaFields = append(
 	nativetypes.LatestExecutionPayloadHeaderCapella,
 	nativetypes.NextWithdrawalIndex,
 	nativetypes.NextWithdrawalValidatorIndex,
+	nativetypes.HistoricalSummaries,
 )
 
 const (
 	phase0SharedFieldRefCount    = 10
 	altairSharedFieldRefCount    = 11
 	bellatrixSharedFieldRefCount = 12
-	capellaSharedFieldRefCount   = 13
+	capellaSharedFieldRefCount   = 14
 )
 
 // InitializeFromProtoPhase0 the beacon state from a protobuf representation.
@@ -433,6 +434,7 @@ func InitializeFromProtoUnsafeCapella(st *ethpb.BeaconStateCapella) (state.Beaco
 		latestExecutionPayloadHeaderCapella: st.LatestExecutionPayloadHeader,
 		nextWithdrawalIndex:                 st.NextWithdrawalIndex,
 		nextWithdrawalValidatorIndex:        st.NextWithdrawalValidatorIndex,
+		historicalSummaries:                 st.HistoricalSummaries,
 
 		dirtyFields:           make(map[nativetypes.FieldIndex]bool, fieldCount),
 		dirtyIndices:          make(map[nativetypes.FieldIndex][]uint64, fieldCount),
@@ -466,6 +468,7 @@ func InitializeFromProtoUnsafeCapella(st *ethpb.BeaconStateCapella) (state.Beaco
 	b.sharedFieldReferences[nativetypes.CurrentEpochParticipationBits] = stateutil.NewRef(1)
 	b.sharedFieldReferences[nativetypes.InactivityScores] = stateutil.NewRef(1)
 	b.sharedFieldReferences[nativetypes.LatestExecutionPayloadHeaderCapella] = stateutil.NewRef(1) // New in Capella.
+	b.sharedFieldReferences[nativetypes.HistoricalSummaries] = stateutil.NewRef(1)                 // New in Capella.
 
 	state.StateCount.Inc()
 	// Finalizer runs when dst is being destroyed in garbage collection.
@@ -512,6 +515,7 @@ func (b *BeaconState) Copy() state.BeaconState {
 		// Large arrays, increases over time.
 		balances:                   b.balances,
 		historicalRoots:            b.historicalRoots,
+		historicalSummaries:        b.historicalSummaries,
 		validators:                 b.validators,
 		previousEpochParticipation: b.previousEpochParticipation,
 		currentEpochParticipation:  b.currentEpochParticipation,
@@ -833,6 +837,8 @@ func (b *BeaconState) rootSelector(ctx context.Context, field nativetypes.FieldI
 		return ssz.Uint64Root(b.nextWithdrawalIndex), nil
 	case nativetypes.NextWithdrawalValidatorIndex:
 		return ssz.Uint64Root(uint64(b.nextWithdrawalValidatorIndex)), nil
+	case nativetypes.HistoricalSummaries:
+		return stateutil.HistoricalSummariesRoot(b.historicalSummaries)
 	}
 	return [32]byte{}, errors.New("invalid field index provided")
 }

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

@@ -71,6 +71,8 @@ func (f FieldIndex) String(_ int) string {
 		return "NextWithdrawalIndex"
 	case NextWithdrawalValidatorIndex:
 		return "NextWithdrawalValidatorIndex"
+	case HistoricalSummaries:
+		return "HistoricalSummaries"
 	default:
 		return ""
 	}
@@ -134,6 +136,8 @@ func (f FieldIndex) RealPosition() int {
 		return 25
 	case NextWithdrawalValidatorIndex:
 		return 26
+	case HistoricalSummaries:
+		return 27
 	default:
 		return -1
 	}
@@ -191,4 +195,5 @@ const (
 	LatestExecutionPayloadHeaderCapella
 	NextWithdrawalIndex
 	NextWithdrawalValidatorIndex
+	HistoricalSummaries
 )

beacon-chain/state/stateutil/BUILD.bazel

@@ -9,6 +9,7 @@ go_library(
         "field_root_eth1.go",
         "field_root_validator.go",
         "field_root_vector.go",
+        "historical_summaries_root.go",
         "participation_bit_root.go",
         "pending_attestation_root.go",
         "reference.go",

beacon-chain/state/stateutil/historical_summaries_root.go

@@ -0,0 +1,49 @@
+package stateutil
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+
+	"github.com/pkg/errors"
+	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v3/crypto/hash"
+	"github.com/prysmaticlabs/prysm/v3/encoding/ssz"
+	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+)
+
+func HistoricalSummariesRoot(summaries []*ethpb.HistoricalSummary) ([32]byte, error) {
+	max := uint64(fieldparams.HistoricalRootsLength)
+	if uint64(len(summaries)) > max {
+		return [32]byte{}, fmt.Errorf("historical summary exceeds max length %d", max)
+	}
+
+	hasher := hash.CustomSHA256Hasher()
+	roots := make([][32]byte, len(summaries))
+	for i := 0; i < len(summaries); i++ {
+		r, err := summaries[i].HashTreeRoot()
+		if err != nil {
+			return [32]byte{}, errors.Wrap(err, "could not merkleize historical summary")
+		}
+		roots[i] = r
+	}
+
+	summariesRoot, err := ssz.BitwiseMerkleize(
+		hasher,
+		roots,
+		uint64(len(roots)),
+		fieldparams.HistoricalRootsLength,
+	)
+	if err != nil {
+		return [32]byte{}, errors.Wrap(err, "could not compute historical summaries merkleization")
+	}
+	summariesLenBuf := new(bytes.Buffer)
+	if err := binary.Write(summariesLenBuf, binary.LittleEndian, uint64(len(summaries))); err != nil {
+		return [32]byte{}, errors.Wrap(err, "could not marshal historical summary length")
+	}
+	// We need to mix in the length of the slice.
+	summariesLenRoot := make([]byte, 32)
+	copy(summariesLenRoot, summariesLenBuf.Bytes())
+	res := ssz.MixInLength(summariesRoot, summariesLenRoot)
+	return res, nil
+}

beacon-chain/sync/BUILD.bazel

@@ -4,6 +4,7 @@ go_library(
     name = "go_default_library",
     srcs = [
         "batch_verifier.go",
+        "broadcast_bls_changes.go",
         "context.go",
         "deadlines.go",
         "decode_pubsub.go",
@@ -133,6 +134,7 @@ go_test(
     size = "small",
     srcs = [
         "batch_verifier_test.go",
+        "broadcast_bls_changes_test.go",
         "context_test.go",
         "decode_pubsub_test.go",
         "error_test.go",

beacon-chain/sync/broadcast_bls_changes.go

@@ -0,0 +1,29 @@
+package sync
+
+import (
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v3/config/params"
+	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v3/time/slots"
+)
+
+// This routine broadcasts all known BLS changes at the Capella fork.
+func (s *Service) broadcastBLSChanges(currSlot types.Slot) error {
+	capellaSlotStart, err := slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	if err != nil {
+		// only possible error is an overflow, so we exit early from the method
+		return nil
+	}
+	if currSlot == capellaSlotStart {
+		changes, err := s.cfg.blsToExecPool.PendingBLSToExecChanges()
+		if err != nil {
+			return errors.Wrap(err, "could not get BLS to execution changes")
+		}
+		for _, ch := range changes {
+			if err := s.cfg.p2p.Broadcast(s.ctx, ch); err != nil {
+				return errors.Wrap(err, "could not broadcast BLS to execution changes.")
+			}
+		}
+	}
+	return nil
+}

beacon-chain/sync/broadcast_bls_changes_test.go

@@ -0,0 +1,50 @@
+package sync
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	mockChain "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
+	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
+	mockp2p "github.com/prysmaticlabs/prysm/v3/beacon-chain/p2p/testing"
+	mockSync "github.com/prysmaticlabs/prysm/v3/beacon-chain/sync/initial-sync/testing"
+	"github.com/prysmaticlabs/prysm/v3/config/params"
+	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v3/time/slots"
+)
+
+func TestBroadcastBLSChanges(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	c := params.BeaconConfig()
+	c.CapellaForkEpoch = c.BellatrixForkEpoch.Add(2)
+	params.OverrideBeaconConfig(c)
+	chainService := &mockChain.ChainService{
+		Genesis:        time.Now(),
+		ValidatorsRoot: [32]byte{'A'},
+	}
+	s := NewService(context.Background(),
+		WithP2P(mockp2p.NewTestP2P(t)),
+		WithInitialSync(&mockSync.Sync{IsSyncing: false}),
+		WithChainService(chainService),
+		WithStateNotifier(chainService.StateNotifier()),
+		WithOperationNotifier(chainService.OperationNotifier()),
+		WithBlsToExecPool(blstoexec.NewPool()),
+	)
+	var emptySig [96]byte
+	s.cfg.blsToExecPool.InsertBLSToExecChange(&ethpb.SignedBLSToExecutionChange{
+		Message: &ethpb.BLSToExecutionChange{
+			ValidatorIndex:     10,
+			FromBlsPubkey:      make([]byte, 48),
+			ToExecutionAddress: make([]byte, 20),
+		},
+		Signature: emptySig[:],
+	})
+
+	capellaStart, err := slots.EpochStart(params.BeaconConfig().CapellaForkEpoch)
+	require.NoError(t, err)
+	require.NoError(t, s.broadcastBLSChanges(capellaStart))
+	require.NoError(t, s.broadcastBLSChanges(capellaStart+1))
+
+}