Update testing/endtoend/evaluators/validator.go

Co-authored-by: Potuz <potuz@prysmaticlabs.com>

BUILD.bazel

@@ -193,7 +193,7 @@ nogo(
         "//tools/analyzers/featureconfig:go_default_library",
         "//tools/analyzers/gocognit:go_default_library",
         "//tools/analyzers/ineffassign:go_default_library",
-        "//tools/analyzers/httperror:go_default_library",
+        "//tools/analyzers/httpwriter:go_default_library",
         "//tools/analyzers/interfacechecker:go_default_library",
         "//tools/analyzers/logcapitalization:go_default_library",
         "//tools/analyzers/logruswitherror:go_default_library",

beacon-chain/blockchain/execution_engine_test.go

@@ -1053,40 +1053,3 @@ func TestKZGCommitmentToVersionedHashes(t *testing.T) {
 	require.Equal(t, vhs[0].String(), vh0)
 	require.Equal(t, vhs[1].String(), vh1)
 }
-
-func TestComputePayloadAttribute(t *testing.T) {
-	service, tr := minimalTestService(t, WithPayloadIDCache(cache.NewPayloadIDCache()))
-	ctx := tr.ctx
-
-	st, _ := util.DeterministicGenesisStateBellatrix(t, 1)
-
-	service.cfg.TrackedValidatorsCache.Set(cache.TrackedValidator{Active: true, Index: 0})
-	// Cache hit, advance state, no fee recipient
-	slot := primitives.Slot(1)
-	service.cfg.PayloadIDCache.Set(slot, [32]byte{}, [8]byte{})
-	blk := util.NewBeaconBlockBellatrix()
-	signed, err := consensusblocks.NewSignedBeaconBlock(blk)
-	require.NoError(t, err)
-	roblock, err := consensusblocks.NewROBlockWithRoot(signed, [32]byte{'a'})
-	require.NoError(t, err)
-	cfg := &postBlockProcessConfig{
-		ctx:     ctx,
-		roblock: roblock,
-	}
-	fcu := &fcuConfig{
-		headState:     st,
-		proposingSlot: slot,
-		headRoot:      [32]byte{},
-	}
-	require.NoError(t, service.computePayloadAttributes(cfg, fcu))
-	require.Equal(t, false, fcu.attributes.IsEmpty())
-	require.Equal(t, params.BeaconConfig().EthBurnAddressHex, common.BytesToAddress(fcu.attributes.SuggestedFeeRecipient()).String())
-
-	// Cache hit, advance state, has fee recipient
-	suggestedAddr := common.HexToAddress("123")
-	service.cfg.TrackedValidatorsCache.Set(cache.TrackedValidator{Active: true, FeeRecipient: primitives.ExecutionAddress(suggestedAddr), Index: 0})
-	service.cfg.PayloadIDCache.Set(slot, [32]byte{}, [8]byte{})
-	require.NoError(t, service.computePayloadAttributes(cfg, fcu))
-	require.Equal(t, false, fcu.attributes.IsEmpty())
-	require.Equal(t, suggestedAddr, common.BytesToAddress(fcu.attributes.SuggestedFeeRecipient()))
-}

beacon-chain/blockchain/forkchoice_update_execution.go

@@ -12,6 +12,7 @@ import (
 	payloadattribute "github.com/OffchainLabs/prysm/v7/consensus-types/payload-attribute"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v7/monitoring/tracing/trace"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
 	"github.com/OffchainLabs/prysm/v7/time/slots"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -53,58 +54,53 @@ type fcuConfig struct {
 }
 
 // sendFCU handles the logic to notify the engine of a forckhoice update
-// for the first time when processing an incoming block during regular sync. It
-// always updates the shuffling caches and handles epoch transitions when the
-// incoming block is late, preparing payload attributes in this case while it
-// only sends a message with empty attributes for early blocks.
-func (s *Service) sendFCU(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) error {
-	if !s.isNewHead(cfg.headRoot) {
-		return nil
+// when processing an incoming block during regular sync. It
+// always updates the shuffling caches and handles epoch transitions .
+func (s *Service) sendFCU(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) {
+	if cfg.postState.Version() < version.Fulu {
+		// update the caches to compute the right proposer index
+		// this function is called under a forkchoice lock which we need to release.
+		s.ForkChoicer().Unlock()
+		s.updateCachesPostBlockProcessing(cfg)
+		s.ForkChoicer().Lock()
 	}
+	if err := s.getFCUArgs(cfg, fcuArgs); err != nil {
+		log.WithError(err).Error("Could not get forkchoice update argument")
+		return
+	}
+	// If head has not been updated and attributes are nil, we can skip the FCU.
+	if !s.isNewHead(cfg.headRoot) && (fcuArgs.attributes == nil || fcuArgs.attributes.IsEmpty()) {
+		return
+	}
+	// If we are proposing and we aim to reorg the block, we have already sent FCU with attributes on lateBlockTasks
 	if fcuArgs.attributes != nil && !fcuArgs.attributes.IsEmpty() && s.shouldOverrideFCU(cfg.headRoot, s.CurrentSlot()+1) {
-		return nil
+		return
+	}
+	if s.inRegularSync() {
+		go s.forkchoiceUpdateWithExecution(cfg.ctx, fcuArgs)
 	}
-	return s.forkchoiceUpdateWithExecution(cfg.ctx, fcuArgs)
-}
 
-// sendFCUWithAttributes computes the payload attributes and sends an FCU message
-// to the engine if needed
-func (s *Service) sendFCUWithAttributes(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) {
-	slotCtx, cancel := context.WithTimeout(context.Background(), slotDeadline)
-	defer cancel()
-	cfg.ctx = slotCtx
-	s.cfg.ForkChoiceStore.RLock()
-	defer s.cfg.ForkChoiceStore.RUnlock()
-	if err := s.computePayloadAttributes(cfg, fcuArgs); err != nil {
-		log.WithError(err).Error("Could not compute payload attributes")
-		return
-	}
-	if fcuArgs.attributes.IsEmpty() {
-		return
-	}
-	if _, err := s.notifyForkchoiceUpdate(cfg.ctx, fcuArgs); err != nil {
-		log.WithError(err).Error("Could not update forkchoice with payload attributes for proposal")
+	if s.isNewHead(fcuArgs.headRoot) {
+		if err := s.saveHead(cfg.ctx, fcuArgs.headRoot, fcuArgs.headBlock, fcuArgs.headState); err != nil {
+			log.WithError(err).Error("Could not save head")
+		}
+		s.pruneAttsFromPool(s.ctx, fcuArgs.headState, fcuArgs.headBlock)
 	}
 }
 
-// fockchoiceUpdateWithExecution is a wrapper around notifyForkchoiceUpdate. It decides whether a new call to FCU should be made.
-func (s *Service) forkchoiceUpdateWithExecution(ctx context.Context, args *fcuConfig) error {
+// fockchoiceUpdateWithExecution is a wrapper around notifyForkchoiceUpdate. It gets a forkchoice lock and calls the engine.
+// The caller of this function should NOT have a lock in forkchoice store.
+func (s *Service) forkchoiceUpdateWithExecution(ctx context.Context, args *fcuConfig) {
 	_, span := trace.StartSpan(ctx, "beacon-chain.blockchain.forkchoiceUpdateWithExecution")
 	defer span.End()
 	// Note: Use the service context here to avoid the parent context being ended during a forkchoice update.
 	ctx = trace.NewContext(s.ctx, span)
+	s.ForkChoicer().Lock()
+	defer s.ForkChoicer().Unlock()
 	_, err := s.notifyForkchoiceUpdate(ctx, args)
 	if err != nil {
-		return errors.Wrap(err, "could not notify forkchoice update")
+		log.WithError(err).Error("Could not notify forkchoice update")
 	}
-
-	if err := s.saveHead(ctx, args.headRoot, args.headBlock, args.headState); err != nil {
-		log.WithError(err).Error("Could not save head")
-	}
-
-	// Only need to prune attestations from pool if the head has changed.
-	s.pruneAttsFromPool(s.ctx, args.headState, args.headBlock)
-	return nil
 }
 
 // shouldOverrideFCU checks whether the incoming block is still subject to being

beacon-chain/blockchain/forkchoice_update_execution_test.go

@@ -97,7 +97,7 @@ func TestService_forkchoiceUpdateWithExecution_exceptionalCases(t *testing.T) {
 		headBlock:     wsb,
 		proposingSlot: service.CurrentSlot() + 1,
 	}
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, args))
+	service.forkchoiceUpdateWithExecution(ctx, args)
 
 	payloadID, has := service.cfg.PayloadIDCache.PayloadID(2, [32]byte{2})
 	require.Equal(t, true, has)
@@ -151,7 +151,7 @@ func TestService_forkchoiceUpdateWithExecution_SameHeadRootNewProposer(t *testin
 		headRoot:      r,
 		proposingSlot: service.CurrentSlot() + 1,
 	}
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, args))
+	service.forkchoiceUpdateWithExecution(ctx, args)
 }
 
 func TestShouldOverrideFCU(t *testing.T) {

beacon-chain/blockchain/process_attestation_helpers.go

@@ -22,7 +22,7 @@ import (
 // The caller of this function must have a lock on forkchoice.
 func (s *Service) getRecentPreState(ctx context.Context, c *ethpb.Checkpoint) state.ReadOnlyBeaconState {
 	headEpoch := slots.ToEpoch(s.HeadSlot())
-	if c.Epoch < headEpoch || c.Epoch == 0 {
+	if c.Epoch+1 < headEpoch || c.Epoch == 0 {
 		return nil
 	}
 	// Only use head state if the head state is compatible with the target checkpoint.
@@ -30,11 +30,13 @@ func (s *Service) getRecentPreState(ctx context.Context, c *ethpb.Checkpoint) st
 	if err != nil {
 		return nil
 	}
-	headDependent, err := s.cfg.ForkChoiceStore.DependentRootForEpoch([32]byte(headRoot), c.Epoch-1)
+	// headEpoch - 1 equals c.Epoch if c is from the previous epoch and equals c.Epoch - 1 if c is from the current epoch.
+	// We don't use the smaller c.Epoch - 1 because forkchoice would not have the data to answer that.
+	headDependent, err := s.cfg.ForkChoiceStore.DependentRootForEpoch([32]byte(headRoot), headEpoch-1)
 	if err != nil {
 		return nil
 	}
-	targetDependent, err := s.cfg.ForkChoiceStore.DependentRootForEpoch([32]byte(c.Root), c.Epoch-1)
+	targetDependent, err := s.cfg.ForkChoiceStore.DependentRootForEpoch([32]byte(c.Root), headEpoch-1)
 	if err != nil {
 		return nil
 	}
@@ -43,7 +45,7 @@ func (s *Service) getRecentPreState(ctx context.Context, c *ethpb.Checkpoint) st
 	}
 
 	// If the head state alone is enough, we can return it directly read only.
-	if c.Epoch == headEpoch {
+	if c.Epoch <= headEpoch {
 		st, err := s.HeadStateReadOnly(ctx)
 		if err != nil {
 			return nil

beacon-chain/blockchain/process_attestation_test.go

@@ -170,12 +170,13 @@ func TestService_GetRecentPreState(t *testing.T) {
 	err = s.SetFinalizedCheckpoint(cp0)
 	require.NoError(t, err)
 
-	st, root, err := prepareForkchoiceState(ctx, 31, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
+	st, blk, err := prepareForkchoiceState(ctx, 31, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
 	require.NoError(t, err)
-	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))
+	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	service.head = &head{
 		root:  [32]byte(ckRoot),
 		state: s,
+		block: blk,
 		slot:  31,
 	}
 	require.NotNil(t, service.getRecentPreState(ctx, &ethpb.Checkpoint{Epoch: 1, Root: ckRoot}))
@@ -197,12 +198,13 @@ func TestService_GetRecentPreState_Old_Checkpoint(t *testing.T) {
 	err = s.SetFinalizedCheckpoint(cp0)
 	require.NoError(t, err)
 
-	st, root, err := prepareForkchoiceState(ctx, 33, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
+	st, blk, err := prepareForkchoiceState(ctx, 33, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
 	require.NoError(t, err)
-	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))
+	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	service.head = &head{
 		root:  [32]byte(ckRoot),
 		state: s,
+		block: blk,
 		slot:  33,
 	}
 	require.IsNil(t, service.getRecentPreState(ctx, &ethpb.Checkpoint{}))
@@ -227,6 +229,7 @@ func TestService_GetRecentPreState_Same_DependentRoots(t *testing.T) {
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	st, blk, err = prepareForkchoiceState(ctx, 64, [32]byte{'T'}, blk.Root(), [32]byte{}, cp0, cp0)
 	require.NoError(t, err)
+	headBlock := blk
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	st, blk, err = prepareForkchoiceState(ctx, 33, [32]byte{'U'}, [32]byte(ckRoot), [32]byte{}, cp0, cp0)
 	require.NoError(t, err)
@@ -235,8 +238,9 @@ func TestService_GetRecentPreState_Same_DependentRoots(t *testing.T) {
 
 	service.head = &head{
 		root:  [32]byte{'T'},
-		state: s,
+		block: headBlock,
 		slot:  64,
+		state: s,
 	}
 	require.NotNil(t, service.getRecentPreState(ctx, &ethpb.Checkpoint{Epoch: 2, Root: cpRoot[:]}))
 }
@@ -263,6 +267,7 @@ func TestService_GetRecentPreState_Different_DependentRoots(t *testing.T) {
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	st, blk, err = prepareForkchoiceState(ctx, 64, [32]byte{'U'}, blk.Root(), [32]byte{}, cp0, cp0)
 	require.NoError(t, err)
+	headBlock := blk
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	st, blk, err = prepareForkchoiceState(ctx, 33, [32]byte{'V'}, [32]byte(ckRoot), [32]byte{}, cp0, cp0)
 	require.NoError(t, err)
@@ -270,7 +275,8 @@ func TestService_GetRecentPreState_Different_DependentRoots(t *testing.T) {
 	cpRoot := blk.Root()
 
 	service.head = &head{
-		root:  [32]byte{'T'},
+		root:  [32]byte{'U'},
+		block: headBlock,
 		state: s,
 		slot:  64,
 	}
@@ -287,12 +293,13 @@ func TestService_GetRecentPreState_Different(t *testing.T) {
 	err = s.SetFinalizedCheckpoint(cp0)
 	require.NoError(t, err)
 
-	st, root, err := prepareForkchoiceState(ctx, 33, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
+	st, blk, err := prepareForkchoiceState(ctx, 33, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
 	require.NoError(t, err)
-	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))
+	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blk))
 	service.head = &head{
 		root:  [32]byte(ckRoot),
 		state: s,
+		block: blk,
 		slot:  33,
 	}
 	require.IsNil(t, service.getRecentPreState(ctx, &ethpb.Checkpoint{}))

beacon-chain/blockchain/process_block.go

@@ -66,9 +66,6 @@ func (s *Service) postBlockProcess(cfg *postBlockProcessConfig) error {
 	startTime := time.Now()
 	fcuArgs := &fcuConfig{}
 
-	if s.inRegularSync() {
-		defer s.handleSecondFCUCall(cfg, fcuArgs)
-	}
 	if features.Get().EnableLightClient && slots.ToEpoch(s.CurrentSlot()) >= params.BeaconConfig().AltairForkEpoch {
 		defer s.processLightClientUpdates(cfg)
 	}
@@ -105,14 +102,17 @@ func (s *Service) postBlockProcess(cfg *postBlockProcessConfig) error {
 		s.logNonCanonicalBlockReceived(cfg.roblock.Root(), cfg.headRoot)
 		return nil
 	}
-	if err := s.getFCUArgs(cfg, fcuArgs); err != nil {
-		log.WithError(err).Error("Could not get forkchoice update argument")
-		return nil
-	}
-	if err := s.sendFCU(cfg, fcuArgs); err != nil {
-		return errors.Wrap(err, "could not send FCU to engine")
-	}
+	s.sendFCU(cfg, fcuArgs)
 
+	// Pre-Fulu the caches are updated when computing the payload attributes
+	if cfg.postState.Version() >= version.Fulu {
+		go func() {
+			ctx, cancel := context.WithTimeout(s.ctx, slotDeadline)
+			defer cancel()
+			cfg.ctx = ctx
+			s.updateCachesPostBlockProcessing(cfg)
+		}()
+	}
 	return nil
 }
 
@@ -295,14 +295,6 @@ func (s *Service) onBlockBatch(ctx context.Context, blks []consensusblocks.ROBlo
 			return errors.Wrap(err, "could not set optimistic block to valid")
 		}
 	}
-	arg := &fcuConfig{
-		headState: preState,
-		headRoot:  lastBR,
-		headBlock: lastB,
-	}
-	if _, err := s.notifyForkchoiceUpdate(ctx, arg); err != nil {
-		return err
-	}
 	return s.saveHeadNoDB(ctx, lastB, lastBR, preState, !isValidPayload)
 }
 
@@ -330,6 +322,7 @@ func (s *Service) areSidecarsAvailable(ctx context.Context, avs das.Availability
 	return nil
 }
 
+// the caller of this function must not hold a lock in forkchoice store.
 func (s *Service) updateEpochBoundaryCaches(ctx context.Context, st state.BeaconState) error {
 	e := coreTime.CurrentEpoch(st)
 	if err := helpers.UpdateCommitteeCache(ctx, st, e); err != nil {
@@ -359,7 +352,9 @@ func (s *Service) updateEpochBoundaryCaches(ctx context.Context, st state.Beacon
 	if e > 0 {
 		e = e - 1
 	}
+	s.ForkChoicer().RLock()
 	target, err := s.cfg.ForkChoiceStore.TargetRootForEpoch(r, e)
+	s.ForkChoicer().RUnlock()
 	if err != nil {
 		log.WithError(err).Error("Could not update proposer index state-root map")
 		return nil
@@ -372,7 +367,7 @@ func (s *Service) updateEpochBoundaryCaches(ctx context.Context, st state.Beacon
 }
 
 // Epoch boundary tasks: it copies the headState and updates the epoch boundary
-// caches.
+// caches. The caller of this function must not hold a lock in forkchoice store.
 func (s *Service) handleEpochBoundary(ctx context.Context, slot primitives.Slot, headState state.BeaconState, blockRoot []byte) error {
 	ctx, span := trace.StartSpan(ctx, "blockChain.handleEpochBoundary")
 	defer span.End()
@@ -912,8 +907,6 @@ func (s *Service) lateBlockTasks(ctx context.Context) {
 	if currentSlot == s.HeadSlot() {
 		return
 	}
-	s.cfg.ForkChoiceStore.RLock()
-	defer s.cfg.ForkChoiceStore.RUnlock()
 	// return early if we are in init sync
 	if !s.inRegularSync() {
 		return
@@ -926,14 +919,32 @@ func (s *Service) lateBlockTasks(ctx context.Context) {
 	if lastState == nil {
 		lastRoot, lastState = headRoot[:], headState
 	}
-	// Copy all the field tries in our cached state in the event of late
-	// blocks.
-	lastState.CopyAllTries()
-	if err := transition.UpdateNextSlotCache(ctx, lastRoot, lastState); err != nil {
-		log.WithError(err).Debug("Could not update next slot state cache")
-	}
-	if err := s.handleEpochBoundary(ctx, currentSlot, headState, headRoot[:]); err != nil {
-		log.WithError(err).Error("Could not update epoch boundary caches")
+	// Before Fulu we need to process the next slot to find out if we are proposing.
+	if lastState.Version() < version.Fulu {
+		// Copy all the field tries in our cached state in the event of late
+		// blocks.
+		lastState.CopyAllTries()
+		if err := transition.UpdateNextSlotCache(ctx, lastRoot, lastState); err != nil {
+			log.WithError(err).Debug("Could not update next slot state cache")
+		}
+		if err := s.handleEpochBoundary(ctx, currentSlot, headState, headRoot[:]); err != nil {
+			log.WithError(err).Error("Could not update epoch boundary caches")
+		}
+	} else {
+		// After Fulu, we can update the caches asynchronously after sending FCU to the engine
+		defer func() {
+			go func() {
+				ctx, cancel := context.WithTimeout(s.ctx, slotDeadline)
+				defer cancel()
+				lastState.CopyAllTries()
+				if err := transition.UpdateNextSlotCache(ctx, lastRoot, lastState); err != nil {
+					log.WithError(err).Debug("Could not update next slot state cache")
+				}
+				if err := s.handleEpochBoundary(ctx, currentSlot, headState, headRoot[:]); err != nil {
+					log.WithError(err).Error("Could not update epoch boundary caches")
+				}
+			}()
+		}()
 	}
 	// return early if we already started building a block for the current
 	// head root
@@ -963,6 +974,8 @@ func (s *Service) lateBlockTasks(ctx context.Context) {
 		headBlock:  headBlock,
 		attributes: attribute,
 	}
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
 	_, err = s.notifyForkchoiceUpdate(ctx, fcuArgs)
 	if err != nil {
 		log.WithError(err).Debug("could not perform late block tasks: failed to update forkchoice with engine")

beacon-chain/blockchain/process_block_helpers.go

@@ -42,14 +42,8 @@ func (s *Service) getFCUArgs(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) er
 	if err := s.getFCUArgsEarlyBlock(cfg, fcuArgs); err != nil {
 		return err
 	}
-	if !s.inRegularSync() {
-		return nil
-	}
-	slot := cfg.roblock.Block().Slot()
-	if slots.WithinVotingWindow(s.genesisTime, slot) {
-		return nil
-	}
-	return s.computePayloadAttributes(cfg, fcuArgs)
+	fcuArgs.attributes = s.getPayloadAttribute(cfg.ctx, fcuArgs.headState, fcuArgs.proposingSlot, cfg.headRoot[:])
+	return nil
 }
 
 func (s *Service) getFCUArgsEarlyBlock(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) error {
@@ -173,26 +167,19 @@ func (s *Service) processLightClientUpdates(cfg *postBlockProcessConfig) {
 
 // updateCachesPostBlockProcessing updates the next slot cache and handles the epoch
 // boundary in order to compute the right proposer indices after processing
-// state transition. This function is called on late blocks while still locked,
-// before sending FCU to the engine.
-func (s *Service) updateCachesPostBlockProcessing(cfg *postBlockProcessConfig) error {
+// state transition. The caller of this function must not hold a lock in forkchoice store.
+func (s *Service) updateCachesPostBlockProcessing(cfg *postBlockProcessConfig) {
 	slot := cfg.postState.Slot()
 	root := cfg.roblock.Root()
 	if err := transition.UpdateNextSlotCache(cfg.ctx, root[:], cfg.postState); err != nil {
-		return errors.Wrap(err, "could not update next slot state cache")
+		log.WithError(err).Error("Could not update next slot state cache")
+		return
 	}
 	if !slots.IsEpochEnd(slot) {
-		return nil
+		return
 	}
-	return s.handleEpochBoundary(cfg.ctx, slot, cfg.postState, root[:])
-}
-
-// handleSecondFCUCall handles a second call to FCU when syncing a new block.
-// This is useful when proposing in the next block and we want to defer the
-// computation of the next slot shuffling.
-func (s *Service) handleSecondFCUCall(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) {
-	if (fcuArgs.attributes == nil || fcuArgs.attributes.IsEmpty()) && cfg.headRoot == cfg.roblock.Root() {
-		go s.sendFCUWithAttributes(cfg, fcuArgs)
+	if err := s.handleEpochBoundary(cfg.ctx, slot, cfg.postState, root[:]); err != nil {
+		log.WithError(err).Error("Could not handle epoch boundary")
 	}
 }
 
@@ -202,20 +189,6 @@ func reportProcessingTime(startTime time.Time) {
 	onBlockProcessingTime.Observe(float64(time.Since(startTime).Milliseconds()))
 }
 
-// computePayloadAttributes modifies the passed FCU arguments to
-// contain the right payload attributes with the tracked proposer. It gets
-// called on blocks that arrive after the attestation voting window, or in a
-// background routine after syncing early blocks.
-func (s *Service) computePayloadAttributes(cfg *postBlockProcessConfig, fcuArgs *fcuConfig) error {
-	if cfg.roblock.Root() == cfg.headRoot {
-		if err := s.updateCachesPostBlockProcessing(cfg); err != nil {
-			return err
-		}
-	}
-	fcuArgs.attributes = s.getPayloadAttribute(cfg.ctx, fcuArgs.headState, fcuArgs.proposingSlot, cfg.headRoot[:])
-	return nil
-}
-
 // getBlockPreState returns the pre state of an incoming block. It uses the parent root of the block
 // to retrieve the state in DB. It verifies the pre state's validity and the incoming block
 // is in the correct time window.

beacon-chain/blockchain/process_block_test.go

@@ -738,7 +738,9 @@ func TestOnBlock_CanFinalize_WithOnTick(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, r, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, r)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+		service.cfg.ForkChoiceStore.Unlock()
 		require.NoError(t, service.updateJustificationOnBlock(ctx, preState, postState, currStoreJustifiedEpoch))
 		_, err = service.updateFinalizationOnBlock(ctx, preState, postState, currStoreFinalizedEpoch)
 		require.NoError(t, err)
@@ -788,7 +790,9 @@ func TestOnBlock_CanFinalize(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, r, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, r)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+		service.cfg.ForkChoiceStore.Unlock()
 		require.NoError(t, service.updateJustificationOnBlock(ctx, preState, postState, currStoreJustifiedEpoch))
 		_, err = service.updateFinalizationOnBlock(ctx, preState, postState, currStoreFinalizedEpoch)
 		require.NoError(t, err)
@@ -816,25 +820,9 @@ func TestOnBlock_NilBlock(t *testing.T) {
 	service, tr := minimalTestService(t)
 	signed := &consensusblocks.SignedBeaconBlock{}
 	roblock := consensusblocks.ROBlock{ReadOnlySignedBeaconBlock: signed}
+	service.cfg.ForkChoiceStore.Lock()
 	err := service.postBlockProcess(&postBlockProcessConfig{tr.ctx, roblock, [32]byte{}, nil, true})
-	require.Equal(t, true, IsInvalidBlock(err))
-}
-
-func TestOnBlock_InvalidSignature(t *testing.T) {
-	service, tr := minimalTestService(t)
-	ctx := tr.ctx
-
-	gs, keys := util.DeterministicGenesisState(t, 32)
-	require.NoError(t, service.saveGenesisData(ctx, gs))
-
-	blk, err := util.GenerateFullBlock(gs, keys, util.DefaultBlockGenConfig(), 1)
-	require.NoError(t, err)
-	blk.Signature = []byte{'a'} // Mutate the signature.
-	wsb, err := consensusblocks.NewSignedBeaconBlock(blk)
-	require.NoError(t, err)
-	preState, err := service.getBlockPreState(ctx, wsb.Block())
-	require.NoError(t, err)
-	_, err = service.validateStateTransition(ctx, preState, wsb)
+	service.cfg.ForkChoiceStore.Unlock()
 	require.Equal(t, true, IsInvalidBlock(err))
 }
 
@@ -866,7 +854,9 @@ func TestOnBlock_CallNewPayloadAndForkchoiceUpdated(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, r, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, r)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 		testState, err = service.cfg.StateGen.StateByRoot(ctx, r)
 		require.NoError(t, err)
 	}
@@ -1339,7 +1329,9 @@ func TestOnBlock_ProcessBlocksParallel(t *testing.T) {
 			lock.Lock()
 			roblock, err := consensusblocks.NewROBlockWithRoot(wsb1, r1)
 			require.NoError(t, err)
+			service.cfg.ForkChoiceStore.Lock()
 			require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+			service.cfg.ForkChoiceStore.Unlock()
 			lock.Unlock()
 			wg.Done()
 		}()
@@ -1351,7 +1343,9 @@ func TestOnBlock_ProcessBlocksParallel(t *testing.T) {
 			lock.Lock()
 			roblock, err := consensusblocks.NewROBlockWithRoot(wsb2, r2)
 			require.NoError(t, err)
+			service.cfg.ForkChoiceStore.Lock()
 			require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+			service.cfg.ForkChoiceStore.Unlock()
 			lock.Unlock()
 			wg.Done()
 		}()
@@ -1363,7 +1357,9 @@ func TestOnBlock_ProcessBlocksParallel(t *testing.T) {
 			lock.Lock()
 			roblock, err := consensusblocks.NewROBlockWithRoot(wsb3, r3)
 			require.NoError(t, err)
+			service.cfg.ForkChoiceStore.Lock()
 			require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+			service.cfg.ForkChoiceStore.Unlock()
 			lock.Unlock()
 			wg.Done()
 		}()
@@ -1375,7 +1371,9 @@ func TestOnBlock_ProcessBlocksParallel(t *testing.T) {
 			lock.Lock()
 			roblock, err := consensusblocks.NewROBlockWithRoot(wsb4, r4)
 			require.NoError(t, err)
+			service.cfg.ForkChoiceStore.Lock()
 			require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+			service.cfg.ForkChoiceStore.Unlock()
 			lock.Unlock()
 			wg.Done()
 		}()
@@ -1400,197 +1398,6 @@ func Test_verifyBlkFinalizedSlot_invalidBlock(t *testing.T) {
 	require.Equal(t, true, IsInvalidBlock(err))
 }
 
-// See the description in #10777 and #10782 for the full setup
-// We sync optimistically a chain of blocks. Block 17 is the last block in Epoch
-// 2. Block 18 justifies block 12 (the first in Epoch 2) and Block 19 returns
-// INVALID from FCU, with LVH block 17. No head is viable. We check
-// that the node is optimistic and that we can actually import a block on top of
-// 17 and recover.
-func TestStore_NoViableHead_FCU(t *testing.T) {
-	params.SetupTestConfigCleanup(t)
-	config := params.BeaconConfig()
-	config.SlotsPerEpoch = 6
-	config.AltairForkEpoch = 1
-	config.BellatrixForkEpoch = 2
-	params.OverrideBeaconConfig(config)
-
-	mockEngine := &mockExecution.EngineClient{ErrNewPayload: execution.ErrAcceptedSyncingPayloadStatus, ErrForkchoiceUpdated: execution.ErrAcceptedSyncingPayloadStatus}
-	service, tr := minimalTestService(t, WithExecutionEngineCaller(mockEngine))
-	ctx := tr.ctx
-
-	st, keys := util.DeterministicGenesisState(t, 64)
-	stateRoot, err := st.HashTreeRoot(ctx)
-	require.NoError(t, err, "Could not hash genesis state")
-
-	require.NoError(t, service.saveGenesisData(ctx, st))
-
-	genesis := blocks.NewGenesisBlock(stateRoot[:])
-	wsb, err := consensusblocks.NewSignedBeaconBlock(genesis)
-	require.NoError(t, err)
-	require.NoError(t, service.cfg.BeaconDB.SaveBlock(ctx, wsb), "Could not save genesis block")
-
-	parentRoot, err := genesis.Block.HashTreeRoot()
-	require.NoError(t, err, "Could not get signing root")
-	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, st, parentRoot), "Could not save genesis state")
-	require.NoError(t, service.cfg.BeaconDB.SaveHeadBlockRoot(ctx, parentRoot), "Could not save genesis state")
-
-	for i := 1; i < 6; i++ {
-		driftGenesisTime(service, primitives.Slot(i), 0)
-		st, err := service.HeadState(ctx)
-		require.NoError(t, err)
-		b, err := util.GenerateFullBlock(st, keys, util.DefaultBlockGenConfig(), primitives.Slot(i))
-		require.NoError(t, err)
-		wsb, err := consensusblocks.NewSignedBeaconBlock(b)
-		require.NoError(t, err)
-		root, err := b.Block.HashTreeRoot()
-		require.NoError(t, err)
-
-		preState, err := service.getBlockPreState(ctx, wsb.Block())
-		require.NoError(t, err)
-		postState, err := service.validateStateTransition(ctx, preState, wsb)
-		require.NoError(t, err)
-		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
-		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
-		require.NoError(t, err)
-		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
-	}
-
-	for i := 6; i < 12; i++ {
-		driftGenesisTime(service, primitives.Slot(i), 0)
-		st, err := service.HeadState(ctx)
-		require.NoError(t, err)
-		b, err := util.GenerateFullBlockAltair(st, keys, util.DefaultBlockGenConfig(), primitives.Slot(i))
-		require.NoError(t, err)
-		wsb, err := consensusblocks.NewSignedBeaconBlock(b)
-		require.NoError(t, err)
-		root, err := b.Block.HashTreeRoot()
-		require.NoError(t, err)
-		preState, err := service.getBlockPreState(ctx, wsb.Block())
-		require.NoError(t, err)
-		postState, err := service.validateStateTransition(ctx, preState, wsb)
-		require.NoError(t, err)
-		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
-		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
-		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
-	}
-
-	for i := 12; i < 18; i++ {
-		driftGenesisTime(service, primitives.Slot(i), 0)
-		st, err := service.HeadState(ctx)
-		require.NoError(t, err)
-		b, err := util.GenerateFullBlockBellatrix(st, keys, util.DefaultBlockGenConfig(), primitives.Slot(i))
-		require.NoError(t, err)
-		wsb, err := consensusblocks.NewSignedBeaconBlock(b)
-		require.NoError(t, err)
-		root, err := b.Block.HashTreeRoot()
-		require.NoError(t, err)
-		preState, err := service.getBlockPreState(ctx, wsb.Block())
-		require.NoError(t, err)
-		postState, err := service.validateStateTransition(ctx, preState, wsb)
-		require.NoError(t, err)
-		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
-		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
-		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
-	}
-	// Check that we haven't justified the second epoch yet
-	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
-	require.Equal(t, primitives.Epoch(0), jc.Epoch)
-
-	// import a block that justifies the second epoch
-	driftGenesisTime(service, 18, 0)
-	validHeadState, err := service.HeadState(ctx)
-	require.NoError(t, err)
-	b, err := util.GenerateFullBlockBellatrix(validHeadState, keys, util.DefaultBlockGenConfig(), 18)
-	require.NoError(t, err)
-	wsb, err = consensusblocks.NewSignedBeaconBlock(b)
-	require.NoError(t, err)
-	firstInvalidRoot, err := b.Block.HashTreeRoot()
-	require.NoError(t, err)
-	preState, err := service.getBlockPreState(ctx, wsb.Block())
-	require.NoError(t, err)
-	postState, err := service.validateStateTransition(ctx, preState, wsb)
-	require.NoError(t, err)
-	require.NoError(t, service.savePostStateInfo(ctx, firstInvalidRoot, wsb, postState))
-	roblock, err := consensusblocks.NewROBlockWithRoot(wsb, firstInvalidRoot)
-	require.NoError(t, err)
-	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-	require.NoError(t, err)
-	jc = service.cfg.ForkChoiceStore.JustifiedCheckpoint()
-	require.Equal(t, primitives.Epoch(2), jc.Epoch)
-
-	sjc := validHeadState.CurrentJustifiedCheckpoint()
-	require.Equal(t, primitives.Epoch(0), sjc.Epoch)
-	lvh := b.Block.Body.ExecutionPayload.ParentHash
-	// check our head
-	require.Equal(t, firstInvalidRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
-
-	// import another block to find out that it was invalid
-	mockEngine = &mockExecution.EngineClient{ErrNewPayload: execution.ErrAcceptedSyncingPayloadStatus, ErrForkchoiceUpdated: execution.ErrInvalidPayloadStatus, ForkChoiceUpdatedResp: lvh}
-	service.cfg.ExecutionEngineCaller = mockEngine
-	driftGenesisTime(service, 19, 0)
-	st, err = service.HeadState(ctx)
-	require.NoError(t, err)
-	b, err = util.GenerateFullBlockBellatrix(st, keys, util.DefaultBlockGenConfig(), 19)
-	require.NoError(t, err)
-	wsb, err = consensusblocks.NewSignedBeaconBlock(b)
-	require.NoError(t, err)
-	root, err := b.Block.HashTreeRoot()
-	require.NoError(t, err)
-	preState, err = service.getBlockPreState(ctx, wsb.Block())
-	require.NoError(t, err)
-	postState, err = service.validateStateTransition(ctx, preState, wsb)
-	require.NoError(t, err)
-	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
-	roblock, err = consensusblocks.NewROBlockWithRoot(wsb, root)
-	require.NoError(t, err)
-	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-	require.ErrorContains(t, "received an INVALID payload from execution engine", err)
-	// Check that forkchoice's head is the last invalid block imported. The
-	// store's headroot is the previous head (since the invalid block did
-	// not finish importing) one and that the node is optimistic
-	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
-	headRoot, err := service.HeadRoot(ctx)
-	require.NoError(t, err)
-	require.Equal(t, firstInvalidRoot, bytesutil.ToBytes32(headRoot))
-	optimistic, err := service.IsOptimistic(ctx)
-	require.NoError(t, err)
-	require.Equal(t, true, optimistic)
-
-	// import another block based on the last valid head state
-	mockEngine = &mockExecution.EngineClient{}
-	service.cfg.ExecutionEngineCaller = mockEngine
-	driftGenesisTime(service, 20, 0)
-	b, err = util.GenerateFullBlockBellatrix(validHeadState, keys, &util.BlockGenConfig{}, 20)
-	require.NoError(t, err)
-	wsb, err = consensusblocks.NewSignedBeaconBlock(b)
-	require.NoError(t, err)
-	root, err = b.Block.HashTreeRoot()
-	require.NoError(t, err)
-
-	preState, err = service.getBlockPreState(ctx, wsb.Block())
-	require.NoError(t, err)
-	postState, err = service.validateStateTransition(ctx, preState, wsb)
-	require.NoError(t, err)
-	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
-	roblock, err = consensusblocks.NewROBlockWithRoot(wsb, root)
-	require.NoError(t, err)
-	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true})
-	require.NoError(t, err)
-	// Check the newly imported block is head, it justified the right
-	// checkpoint and the node is no longer optimistic
-	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
-	sjc = service.CurrentJustifiedCheckpt()
-	require.Equal(t, jc.Epoch, sjc.Epoch)
-	require.Equal(t, jc.Root, bytesutil.ToBytes32(sjc.Root))
-	optimistic, err = service.IsOptimistic(ctx)
-	require.NoError(t, err)
-	require.Equal(t, false, optimistic)
-}
-
 // See the description in #10777 and #10782 for the full setup
 // We sync optimistically a chain of blocks. Block 17 is the last block in Epoch
 // 2. Block 18 justifies block 12 (the first in Epoch 2) and Block 19 returns
@@ -1642,7 +1449,9 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 
 	for i := 6; i < 12; i++ {
@@ -1662,8 +1471,9 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
+		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 
 	for i := 12; i < 18; i++ {
@@ -1684,8 +1494,9 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
+		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 	// Check that we haven't justified the second epoch yet
 	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
@@ -1708,7 +1519,9 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, firstInvalidRoot, wsb, postState))
 	roblock, err := consensusblocks.NewROBlockWithRoot(wsb, firstInvalidRoot)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
+	service.cfg.ForkChoiceStore.Unlock()
 	require.NoError(t, err)
 	jc = service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(2), jc.Epoch)
@@ -1718,6 +1531,10 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 	lvh := b.Block.Body.ExecutionPayload.ParentHash
 	// check our head
 	require.Equal(t, firstInvalidRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
+	isBlock18OptimisticAfterImport, err := service.IsOptimisticForRoot(ctx, firstInvalidRoot)
+	require.NoError(t, err)
+	require.Equal(t, true, isBlock18OptimisticAfterImport)
+	time.Sleep(20 * time.Millisecond) // wait for async forkchoice update to be processed
 
 	// import another block to find out that it was invalid
 	mockEngine = &mockExecution.EngineClient{ErrNewPayload: execution.ErrInvalidPayloadStatus, NewPayloadResp: lvh}
@@ -1768,7 +1585,9 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 	roblock, err = consensusblocks.NewROBlockWithRoot(wsb, root)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true})
+	service.cfg.ForkChoiceStore.Unlock()
 	require.NoError(t, err)
 	// Check the newly imported block is head, it justified the right
 	// checkpoint and the node is no longer optimistic
@@ -1835,7 +1654,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 
 	for i := 6; i < 12; i++ {
@@ -1856,8 +1677,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
+		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 
 	// import the merge block
@@ -1877,7 +1699,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, lastValidRoot, wsb, postState))
 	roblock, err := consensusblocks.NewROBlockWithRoot(wsb, lastValidRoot)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
+	service.cfg.ForkChoiceStore.Unlock()
 	require.NoError(t, err)
 	// save the post state and the payload Hash of this block since it will
 	// be the LVH
@@ -1906,8 +1730,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, invalidRoots[i-13], wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, invalidRoots[i-13])
 		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
+		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 	// Check that we have justified the second epoch
 	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
@@ -1975,7 +1800,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 	roblock, err = consensusblocks.NewROBlockWithRoot(wsb, root)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true}))
+	service.cfg.ForkChoiceStore.Unlock()
 	// Check that the head is still INVALID and the node is still optimistic
 	require.Equal(t, invalidHeadRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	optimistic, err = service.IsOptimistic(ctx)
@@ -2000,7 +1827,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true})
+		service.cfg.ForkChoiceStore.Unlock()
 		require.NoError(t, err)
 		st, err = service.cfg.StateGen.StateByRoot(ctx, root)
 		require.NoError(t, err)
@@ -2028,7 +1857,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 	roblock, err = consensusblocks.NewROBlockWithRoot(wsb, root)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, true})
+	service.cfg.ForkChoiceStore.Unlock()
 	require.NoError(t, err)
 	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	sjc = service.CurrentJustifiedCheckpt()
@@ -2072,7 +1903,6 @@ func TestNoViableHead_Reboot(t *testing.T) {
 	require.NoError(t, service.cfg.BeaconDB.SaveGenesisBlockRoot(ctx, genesisRoot), "Could not save genesis state")
 
 	for i := 1; i < 6; i++ {
-		t.Log(i)
 		driftGenesisTime(service, primitives.Slot(i), 0)
 		st, err := service.HeadState(ctx)
 		require.NoError(t, err)
@@ -2089,7 +1919,9 @@ func TestNoViableHead_Reboot(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 
 	for i := 6; i < 12; i++ {
@@ -2109,8 +1941,9 @@ func TestNoViableHead_Reboot(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
-		err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
-		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
+		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 	}
 
 	// import the merge block
@@ -2130,7 +1963,9 @@ func TestNoViableHead_Reboot(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, lastValidRoot, wsb, postState))
 	roblock, err := consensusblocks.NewROBlockWithRoot(wsb, lastValidRoot)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
+	service.cfg.ForkChoiceStore.Unlock()
 	require.NoError(t, err)
 	// save the post state and the payload Hash of this block since it will
 	// be the LVH
@@ -2161,7 +1996,9 @@ func TestNoViableHead_Reboot(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 		require.NoError(t, service.updateJustificationOnBlock(ctx, preState, postState, currStoreJustifiedEpoch))
 		_, err = service.updateFinalizationOnBlock(ctx, preState, postState, currStoreFinalizedEpoch)
 		require.NoError(t, err)
@@ -2282,7 +2119,9 @@ func TestOnBlock_HandleBlockAttestations(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 
 		st, err = service.HeadState(ctx)
 		require.NoError(t, err)
@@ -2348,7 +2187,9 @@ func TestOnBlock_HandleBlockAttestations(t *testing.T) {
 		require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 		roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 		require.NoError(t, err)
+		service.cfg.ForkChoiceStore.Lock()
 		require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+		service.cfg.ForkChoiceStore.Unlock()
 
 		st, err = service.HeadState(ctx)
 		require.NoError(t, err)
@@ -2631,7 +2472,10 @@ func TestRollbackBlock(t *testing.T) {
 	require.NoError(t, err)
 
 	// Rollback block insertion into db and caches.
-	require.ErrorContains(t, fmt.Sprintf("could not insert block %d to fork choice store", roblock.Block().Slot()), service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+	service.cfg.ForkChoiceStore.Lock()
+	err = service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false})
+	service.cfg.ForkChoiceStore.Unlock()
+	require.ErrorContains(t, fmt.Sprintf("could not insert block %d to fork choice store", roblock.Block().Slot()), err)
 
 	// The block should no longer exist.
 	require.Equal(t, false, service.cfg.BeaconDB.HasBlock(ctx, root))
@@ -2732,7 +2576,9 @@ func TestRollbackBlock_ContextDeadline(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, root, wsb, postState))
 	roblock, err := consensusblocks.NewROBlockWithRoot(wsb, root)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+	service.cfg.ForkChoiceStore.Unlock()
 
 	b, err = util.GenerateFullBlock(postState, keys, util.DefaultBlockGenConfig(), 34)
 	require.NoError(t, err)
@@ -2766,7 +2612,10 @@ func TestRollbackBlock_ContextDeadline(t *testing.T) {
 	require.NoError(t, postState.SetFinalizedCheckpoint(cj))
 
 	// Rollback block insertion into db and caches.
-	require.ErrorContains(t, "context canceled", service.postBlockProcess(&postBlockProcessConfig{cancCtx, roblock, [32]byte{}, postState, false}))
+	service.cfg.ForkChoiceStore.Lock()
+	err = service.postBlockProcess(&postBlockProcessConfig{cancCtx, roblock, [32]byte{}, postState, false})
+	service.cfg.ForkChoiceStore.Unlock()
+	require.ErrorContains(t, "context canceled", err)
 
 	// The block should no longer exist.
 	require.Equal(t, false, service.cfg.BeaconDB.HasBlock(ctx, root))
@@ -3262,7 +3111,9 @@ func Test_postBlockProcess_EventSending(t *testing.T) {
 			}
 
 			// Execute postBlockProcess
+			service.cfg.ForkChoiceStore.Lock()
 			err = service.postBlockProcess(cfg)
+			service.cfg.ForkChoiceStore.Unlock()
 
 			// Check error expectation
 			if tt.expectError {

beacon-chain/blockchain/receive_attestation.go

@@ -156,13 +156,15 @@ func (s *Service) UpdateHead(ctx context.Context, proposingSlot primitives.Slot)
 	}
 	if s.inRegularSync() {
 		fcuArgs.attributes = s.getPayloadAttribute(ctx, headState, proposingSlot, newHeadRoot[:])
+		if fcuArgs.attributes != nil && s.shouldOverrideFCU(newHeadRoot, proposingSlot) {
+			return
+		}
+		go s.forkchoiceUpdateWithExecution(s.ctx, fcuArgs)
 	}
-	if fcuArgs.attributes != nil && s.shouldOverrideFCU(newHeadRoot, proposingSlot) {
-		return
-	}
-	if err := s.forkchoiceUpdateWithExecution(s.ctx, fcuArgs); err != nil {
-		log.WithError(err).Error("Could not update forkchoice")
+	if err := s.saveHead(s.ctx, fcuArgs.headRoot, fcuArgs.headBlock, fcuArgs.headState); err != nil {
+		log.WithError(err).Error("Could not save head")
 	}
+	s.pruneAttsFromPool(s.ctx, fcuArgs.headState, fcuArgs.headBlock)
 }
 
 // This processes fork choice attestations from the pool to account for validator votes and fork choice.

beacon-chain/blockchain/receive_attestation_test.go

@@ -117,7 +117,9 @@ func TestService_ProcessAttestationsAndUpdateHead(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, tRoot, wsb, postState))
 	roblock, err := blocks.NewROBlockWithRoot(wsb, tRoot)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+	service.cfg.ForkChoiceStore.Unlock()
 	copied, err = service.cfg.StateGen.StateByRoot(ctx, tRoot)
 	require.NoError(t, err)
 	require.Equal(t, 2, fcs.NodeCount())
@@ -177,7 +179,9 @@ func TestService_UpdateHead_NoAtts(t *testing.T) {
 	require.NoError(t, service.savePostStateInfo(ctx, tRoot, wsb, postState))
 	roblock, err := blocks.NewROBlockWithRoot(wsb, tRoot)
 	require.NoError(t, err)
+	service.cfg.ForkChoiceStore.Lock()
 	require.NoError(t, service.postBlockProcess(&postBlockProcessConfig{ctx, roblock, [32]byte{}, postState, false}))
+	service.cfg.ForkChoiceStore.Unlock()
 	require.Equal(t, 2, fcs.NodeCount())
 	require.NoError(t, service.cfg.BeaconDB.SaveBlock(ctx, wsb))
 	require.Equal(t, tRoot, service.head.root)

beacon-chain/core/blocks/header_test.go

@@ -290,52 +290,3 @@ func TestProcessBlockHeader_OK(t *testing.T) {
 	}
 	assert.Equal(t, true, proto.Equal(nsh, expected), "Expected %v, received %v", expected, nsh)
 }
-
-func TestBlockSignatureSet_OK(t *testing.T) {
-	validators := make([]*ethpb.Validator, params.BeaconConfig().MinGenesisActiveValidatorCount)
-	for i := range validators {
-		validators[i] = &ethpb.Validator{
-			PublicKey:             make([]byte, 32),
-			WithdrawalCredentials: make([]byte, 32),
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-			Slashed:               true,
-		}
-	}
-
-	state, err := util.NewBeaconState()
-	require.NoError(t, err)
-	require.NoError(t, state.SetValidators(validators))
-	require.NoError(t, state.SetSlot(10))
-	require.NoError(t, state.SetLatestBlockHeader(util.HydrateBeaconHeader(&ethpb.BeaconBlockHeader{
-		Slot:          9,
-		ProposerIndex: 0,
-	})))
-
-	latestBlockSignedRoot, err := state.LatestBlockHeader().HashTreeRoot()
-	require.NoError(t, err)
-
-	currentEpoch := time.CurrentEpoch(state)
-	priv, err := bls.RandKey()
-	require.NoError(t, err)
-	pID, err := helpers.BeaconProposerIndex(t.Context(), state)
-	require.NoError(t, err)
-	block := util.NewBeaconBlock()
-	block.Block.Slot = 10
-	block.Block.ProposerIndex = pID
-	block.Block.Body.RandaoReveal = bytesutil.PadTo([]byte{'A', 'B', 'C'}, 96)
-	block.Block.ParentRoot = latestBlockSignedRoot[:]
-	block.Signature, err = signing.ComputeDomainAndSign(state, currentEpoch, block.Block, params.BeaconConfig().DomainBeaconProposer, priv)
-	require.NoError(t, err)
-	proposerIdx, err := helpers.BeaconProposerIndex(t.Context(), state)
-	require.NoError(t, err)
-	validators[proposerIdx].Slashed = false
-	validators[proposerIdx].PublicKey = priv.PublicKey().Marshal()
-	err = state.UpdateValidatorAtIndex(proposerIdx, validators[proposerIdx])
-	require.NoError(t, err)
-	set, err := blocks.BlockSignatureBatch(state, block.Block.ProposerIndex, block.Signature, block.Block.HashTreeRoot)
-	require.NoError(t, err)
-
-	verified, err := set.Verify()
-	require.NoError(t, err)
-	assert.Equal(t, true, verified, "Block signature set returned a set which was unable to be verified")
-}

beacon-chain/core/blocks/signature.go

@@ -122,24 +122,6 @@ func VerifyBlockSignatureUsingCurrentFork(beaconState state.ReadOnlyBeaconState,
 	return nil
 }
 
-// BlockSignatureBatch retrieves the block signature batch from the provided block and its corresponding state.
-func BlockSignatureBatch(beaconState state.ReadOnlyBeaconState,
-	proposerIndex primitives.ValidatorIndex,
-	sig []byte,
-	rootFunc func() ([32]byte, error)) (*bls.SignatureBatch, error) {
-	currentEpoch := slots.ToEpoch(beaconState.Slot())
-	domain, err := signing.Domain(beaconState.Fork(), currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
-	if err != nil {
-		return nil, err
-	}
-	proposer, err := beaconState.ValidatorAtIndex(proposerIndex)
-	if err != nil {
-		return nil, err
-	}
-	proposerPubKey := proposer.PublicKey
-	return signing.BlockSignatureBatch(proposerPubKey, sig, domain, rootFunc)
-}
-
 // RandaoSignatureBatch retrieves the relevant randao specific signature batch object
 // from a block and its corresponding state.
 func RandaoSignatureBatch(

beacon-chain/core/electra/consolidations.go

@@ -278,12 +278,12 @@ func ProcessConsolidationRequests(ctx context.Context, st state.BeaconState, req
 		if uint64(curEpoch) < e {
 			continue
 		}
-		bal, err := st.PendingBalanceToWithdraw(srcIdx)
+		hasBal, err := st.HasPendingBalanceToWithdraw(srcIdx)
 		if err != nil {
 			log.WithError(err).Error("Failed to fetch pending balance to withdraw")
 			continue
 		}
-		if bal > 0 {
+		if hasBal {
 			continue
 		}
 

beacon-chain/core/transition/transition_no_verify_sig.go

@@ -182,12 +182,6 @@ func ProcessBlockNoVerifyAnySig(
 		return nil, nil, err
 	}
 
-	sig := signed.Signature()
-	bSet, err := b.BlockSignatureBatch(st, blk.ProposerIndex(), sig[:], blk.HashTreeRoot)
-	if err != nil {
-		tracing.AnnotateError(span, err)
-		return nil, nil, errors.Wrap(err, "could not retrieve block signature set")
-	}
 	randaoReveal := signed.Block().Body().RandaoReveal()
 	rSet, err := b.RandaoSignatureBatch(ctx, st, randaoReveal[:])
 	if err != nil {
@@ -201,7 +195,7 @@ func ProcessBlockNoVerifyAnySig(
 
 	// Merge beacon block, randao and attestations signatures into a set.
 	set := bls.NewSet()
-	set.Join(bSet).Join(rSet).Join(aSet)
+	set.Join(rSet).Join(aSet)
 
 	if blk.Version() >= version.Capella {
 		changes, err := signed.Block().Body().BLSToExecutionChanges()

beacon-chain/core/transition/transition_no_verify_sig_test.go

@@ -157,9 +157,8 @@ func TestProcessBlockNoVerify_SigSetContainsDescriptions(t *testing.T) {
 	set, _, err := transition.ProcessBlockNoVerifyAnySig(t.Context(), beaconState, wsb)
 	require.NoError(t, err)
 	assert.Equal(t, len(set.Signatures), len(set.Descriptions), "Signatures and descriptions do not match up")
-	assert.Equal(t, "block signature", set.Descriptions[0])
-	assert.Equal(t, "randao signature", set.Descriptions[1])
-	assert.Equal(t, "attestation signature", set.Descriptions[2])
+	assert.Equal(t, "randao signature", set.Descriptions[0])
+	assert.Equal(t, "attestation signature", set.Descriptions[1])
 }
 
 func TestProcessOperationsNoVerifyAttsSigs_OK(t *testing.T) {

beacon-chain/das/needs.go

@@ -67,9 +67,9 @@ func NewSyncNeeds(current CurrentSlotter, oldestSlotFlagPtr *primitives.Slot, bl
 
 	// Override spec minimum block retention with user-provided flag only if it is lower than the spec minimum.
 	sn.blockRetention = primitives.Epoch(params.BeaconConfig().MinEpochsForBlockRequests)
+
 	if oldestSlotFlagPtr != nil {
-		oldestEpoch := slots.ToEpoch(*oldestSlotFlagPtr)
-		if oldestEpoch < sn.blockRetention {
+		if *oldestSlotFlagPtr <= syncEpochOffset(current(), sn.blockRetention) {
 			sn.validOldestSlotPtr = oldestSlotFlagPtr
 		} else {
 			log.WithField("backfill-oldest-slot", *oldestSlotFlagPtr).

beacon-chain/das/needs_test.go

@@ -128,6 +128,9 @@ func TestSyncNeedsInitialize(t *testing.T) {
 	slotsPerEpoch := params.BeaconConfig().SlotsPerEpoch
 	minBlobEpochs := params.BeaconConfig().MinEpochsForBlobsSidecarsRequest
 	minColEpochs := params.BeaconConfig().MinEpochsForDataColumnSidecarsRequest
+	denebSlot := slots.UnsafeEpochStart(params.BeaconConfig().DenebForkEpoch)
+	fuluSlot := slots.UnsafeEpochStart(params.BeaconConfig().FuluForkEpoch)
+	minSlots := slots.UnsafeEpochStart(primitives.Epoch(params.BeaconConfig().MinEpochsForBlockRequests))
 
 	currentSlot := primitives.Slot(10000)
 	currentFunc := func() primitives.Slot { return currentSlot }
@@ -141,6 +144,7 @@ func TestSyncNeedsInitialize(t *testing.T) {
 		expectedCol       primitives.Epoch
 		name              string
 		input             SyncNeeds
+		current           func() primitives.Slot
 	}{
 		{
 			name:              "basic initialization with no flags",
@@ -174,13 +178,13 @@ func TestSyncNeedsInitialize(t *testing.T) {
 		{
 			name:              "valid oldestSlotFlagPtr (earlier than spec minimum)",
 			blobRetentionFlag: 0,
-			oldestSlotFlagPtr: func() *primitives.Slot {
-				slot := primitives.Slot(10)
-				return &slot
-			}(),
+			oldestSlotFlagPtr: &denebSlot,
 			expectValidOldest: true,
 			expectedBlob:      minBlobEpochs,
 			expectedCol:       minColEpochs,
+			current: func() primitives.Slot {
+				return fuluSlot + minSlots
+			},
 		},
 		{
 			name:              "invalid oldestSlotFlagPtr (later than spec minimum)",
@@ -210,6 +214,9 @@ func TestSyncNeedsInitialize(t *testing.T) {
 		{
 			name:              "both blob retention flag and oldest slot set",
 			blobRetentionFlag: minBlobEpochs + 5,
+			current: func() primitives.Slot {
+				return fuluSlot + minSlots
+			},
 			oldestSlotFlagPtr: func() *primitives.Slot {
 				slot := primitives.Slot(100)
 				return &slot
@@ -232,16 +239,27 @@ func TestSyncNeedsInitialize(t *testing.T) {
 			expectedBlob:      5000,
 			expectedCol:       5000,
 		},
+		{
+			name:              "regression for deneb start",
+			blobRetentionFlag: 8212500,
+			expectValidOldest: true,
+			oldestSlotFlagPtr: &denebSlot,
+			current: func() primitives.Slot {
+				return fuluSlot + minSlots
+			},
+			expectedBlob: 8212500,
+			expectedCol:  8212500,
+		},
 	}
 
 	for _, tc := range cases {
 		t.Run(tc.name, func(t *testing.T) {
-			result, err := NewSyncNeeds(currentFunc, tc.oldestSlotFlagPtr, tc.blobRetentionFlag)
+			if tc.current == nil {
+				tc.current = currentFunc
+			}
+			result, err := NewSyncNeeds(tc.current, tc.oldestSlotFlagPtr, tc.blobRetentionFlag)
 			require.NoError(t, err)
 
-			// Check that current, deneb, fulu are set correctly
-			require.Equal(t, currentSlot, result.current())
-
 			// Check retention calculations
 			require.Equal(t, tc.expectedBlob, result.blobRetention)
 			require.Equal(t, tc.expectedCol, result.colRetention)

beacon-chain/db/filesystem/BUILD.bazel

@@ -38,6 +38,7 @@ go_library(
         "@com_github_prometheus_client_golang//prometheus/promauto:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
         "@com_github_spf13_afero//:go_default_library",
+        "@org_golang_x_sync//errgroup:go_default_library",
     ],
 )
 

beacon-chain/db/filesystem/data_column.go

@@ -25,6 +25,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/time/slots"
 	"github.com/pkg/errors"
 	"github.com/spf13/afero"
+	"golang.org/x/sync/errgroup"
 )
 
 const (
@@ -185,73 +186,162 @@ func (dcs *DataColumnStorage) WarmCache() {
 
 	highestStoredEpoch := primitives.Epoch(0)
 
-	// Walk the data column filesystem to warm up the cache.
-	if err := afero.Walk(dcs.fs, ".", func(path string, info os.FileInfo, fileErr error) (err error) {
-		if fileErr != nil {
-			return fileErr
-		}
-
-		// If not a leaf, skip.
-		if info.IsDir() {
-			return nil
-		}
-
-		// Extract metadata from the file path.
-		fileMetadata, err := extractFileMetadata(path)
-		if err != nil {
-			log.WithError(err).Error("Error encountered while extracting file metadata")
-			return nil
-		}
-
-		// Open the data column filesystem file.
-		f, err := dcs.fs.Open(path)
-		if err != nil {
-			log.WithError(err).Error("Error encountered while opening data column filesystem file")
-			return nil
-		}
-
-		// Close the file.
-		defer func() {
-			// Overwrite the existing error only if it is nil, since the close error is less important.
-			closeErr := f.Close()
-			if closeErr != nil && err == nil {
-				err = closeErr
-			}
-		}()
-
-		// Read the metadata of the file.
-		metadata, err := dcs.metadata(f)
-		if err != nil {
-			log.WithError(err).Error("Error encountered while reading metadata from data column filesystem file")
-			return nil
-		}
-
-		// Check the indices.
-		indices := metadata.indices.all()
-		if len(indices) == 0 {
-			return nil
-		}
-
-		// Build the ident.
-		dataColumnsIdent := DataColumnsIdent{Root: fileMetadata.blockRoot, Epoch: fileMetadata.epoch, Indices: indices}
-
-		// Update the highest stored epoch.
-		highestStoredEpoch = max(highestStoredEpoch, fileMetadata.epoch)
-
-		// Set the ident in the cache.
-		if err := dcs.cache.set(dataColumnsIdent); err != nil {
-			log.WithError(err).Error("Error encountered while ensuring data column filesystem cache")
-		}
-
-		return nil
-	}); err != nil {
-		log.WithError(err).Error("Error encountered while walking data column filesystem.")
+	// List all period directories
+	periodFileInfos, err := afero.ReadDir(dcs.fs, ".")
+	if err != nil {
+		log.WithError(err).Error("Error reading top directory during warm cache")
+		return
 	}
 
-	// Prune the cache and the filesystem.
+	// Iterate through periods
+	for _, periodFileInfo := range periodFileInfos {
+		if !periodFileInfo.IsDir() {
+			continue
+		}
+
+		periodPath := periodFileInfo.Name()
+
+		// List all epoch directories in this period
+		epochFileInfos, err := afero.ReadDir(dcs.fs, periodPath)
+		if err != nil {
+			log.WithError(err).WithField("period", periodPath).Error("Error reading period directory during warm cache")
+			continue
+		}
+
+		// Iterate through epochs
+		for _, epochFileInfo := range epochFileInfos {
+			if !epochFileInfo.IsDir() {
+				continue
+			}
+
+			epochPath := path.Join(periodPath, epochFileInfo.Name())
+
+			// List all .sszs files in this epoch
+			files, err := listEpochFiles(dcs.fs, epochPath)
+			if err != nil {
+				log.WithError(err).WithField("epoch", epochPath).Error("Error listing epoch files during warm cache")
+				continue
+			}
+
+			if len(files) == 0 {
+				continue
+			}
+
+			// Process all files in this epoch in parallel
+			epochHighest, err := dcs.processEpochFiles(files)
+			if err != nil {
+				log.WithError(err).WithField("epoch", epochPath).Error("Error processing epoch files during warm cache")
+			}
+
+			highestStoredEpoch = max(highestStoredEpoch, epochHighest)
+		}
+	}
+
+	// Prune the cache and the filesystem
 	dcs.prune()
 
-	log.WithField("elapsed", time.Since(start)).Info("Data column filesystem cache warm-up complete")
+	totalElapsed := time.Since(start)
+
+	// Log summary
+	log.WithField("elapsed", totalElapsed).Info("Data column filesystem cache warm-up complete")
+}
+
+// listEpochFiles lists all .sszs files in an epoch directory.
+func listEpochFiles(fs afero.Fs, epochPath string) ([]string, error) {
+	fileInfos, err := afero.ReadDir(fs, epochPath)
+	if err != nil {
+		return nil, errors.Wrap(err, "read epoch directory")
+	}
+
+	files := make([]string, 0, len(fileInfos))
+	for _, fileInfo := range fileInfos {
+		if fileInfo.IsDir() {
+			continue
+		}
+
+		fileName := fileInfo.Name()
+		if strings.HasSuffix(fileName, "."+dataColumnsFileExtension) {
+			files = append(files, path.Join(epochPath, fileName))
+		}
+	}
+
+	return files, nil
+}
+
+// processEpochFiles processes all .sszs files in an epoch directory in parallel.
+func (dcs *DataColumnStorage) processEpochFiles(files []string) (primitives.Epoch, error) {
+	var (
+		eg errgroup.Group
+		mu sync.Mutex
+	)
+
+	highestEpoch := primitives.Epoch(0)
+	for _, filePath := range files {
+		eg.Go(func() error {
+			epoch, err := dcs.processFile(filePath)
+			if err != nil {
+				log.WithError(err).WithField("file", filePath).Error("Error processing file during warm cache")
+				return nil
+			}
+
+			mu.Lock()
+			defer mu.Unlock()
+			highestEpoch = max(highestEpoch, epoch)
+
+			return nil
+		})
+	}
+
+	if err := eg.Wait(); err != nil {
+		return highestEpoch, err
+	}
+
+	return highestEpoch, nil
+}
+
+// processFile processes a single .sszs file.
+func (dcs *DataColumnStorage) processFile(filePath string) (primitives.Epoch, error) {
+	// Extract metadata from the file path
+	fileMetadata, err := extractFileMetadata(filePath)
+	if err != nil {
+		return 0, errors.Wrap(err, "extract file metadata")
+	}
+
+	// Open the file (each goroutine gets its own FD)
+	f, err := dcs.fs.Open(filePath)
+	if err != nil {
+		return 0, errors.Wrap(err, "open file")
+	}
+	defer func() {
+		if closeErr := f.Close(); closeErr != nil {
+			log.WithError(closeErr).WithField("file", filePath).Error("Error closing file during warm cache")
+		}
+	}()
+
+	// Read metadata
+	metadata, err := dcs.metadata(f)
+	if err != nil {
+		return 0, errors.Wrap(err, "read metadata")
+	}
+
+	// Extract indices
+	indices := metadata.indices.all()
+	if len(indices) == 0 {
+		return fileMetadata.epoch, nil // No indices, skip
+	}
+
+	// Build ident and set in cache (thread-safe)
+	dataColumnsIdent := DataColumnsIdent{
+		Root:    fileMetadata.blockRoot,
+		Epoch:   fileMetadata.epoch,
+		Indices: indices,
+	}
+
+	if err := dcs.cache.set(dataColumnsIdent); err != nil {
+		return 0, errors.Wrap(err, "cache set")
+	}
+
+	return fileMetadata.epoch, nil
 }
 
 // Summary returns the DataColumnStorageSummary.

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

@@ -14,6 +14,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/api"
 	"github.com/OffchainLabs/prysm/v7/api/server/structs"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/blockchain/kzg"
+	coreblocks "github.com/OffchainLabs/prysm/v7/beacon-chain/core/blocks"
 	corehelpers "github.com/OffchainLabs/prysm/v7/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/transition"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/db/filters"
@@ -957,6 +958,13 @@ func (s *Server) validateConsensus(ctx context.Context, b *eth.GenericSignedBeac
 			}
 		}
 	}
+	blockRoot, err := blk.Block().HashTreeRoot()
+	if err != nil {
+		return errors.Wrap(err, "could not hash block")
+	}
+	if err := coreblocks.VerifyBlockSignatureUsingCurrentFork(parentState, blk, blockRoot); err != nil {
+		return errors.Wrap(err, "could not verify block signature")
+	}
 	_, err = transition.ExecuteStateTransition(ctx, parentState, blk)
 	if err != nil {
 		return errors.Wrap(err, "could not execute state transition")

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

@@ -40,6 +40,7 @@ func GetForkSchedule(w http.ResponseWriter, r *http.Request) {
 		httputil.WriteJson(w, &structs.GetForkScheduleResponse{
 			Data: data,
 		})
+		return
 	}
 	previous := schedule[0]
 	for _, entry := range schedule {

beacon-chain/sync/validate_data_column.go

@@ -3,11 +3,12 @@ package sync
 import (
 	"context"
 	"fmt"
-	"math"
+	"slices"
 	"time"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/feed"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/feed/operation"
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/verification"
 	fieldparams "github.com/OffchainLabs/prysm/v7/config/fieldparams"
@@ -192,19 +193,13 @@ func (s *Service) validateDataColumn(ctx context.Context, pid peer.ID, msg *pubs
 	dataColumnSidecarArrivalGossipSummary.Observe(float64(sinceSlotStartTime.Milliseconds()))
 	dataColumnSidecarVerificationGossipHistogram.Observe(float64(validationTime.Milliseconds()))
 
-	peerGossipScore := s.cfg.p2p.Peers().Scorers().GossipScorer().Score(pid)
-
 	select {
 	case s.dataColumnLogCh <- dataColumnLogEntry{
-		Slot:            roDataColumn.Slot(),
-		ColIdx:          roDataColumn.Index,
-		PropIdx:         roDataColumn.ProposerIndex(),
-		BlockRoot:       roDataColumn.BlockRoot(),
-		ParentRoot:      roDataColumn.ParentRoot(),
-		PeerSuffix:      pid.String()[len(pid.String())-6:],
-		PeerGossipScore: peerGossipScore,
-		validationTime:  validationTime,
-		sinceStartTime:  sinceSlotStartTime,
+		slot:           roDataColumn.Slot(),
+		index:          roDataColumn.Index,
+		root:           roDataColumn.BlockRoot(),
+		validationTime: validationTime,
+		sinceStartTime: sinceSlotStartTime,
 	}:
 	default:
 		log.WithField("slot", roDataColumn.Slot()).Warn("Failed to send data column log entry")
@@ -249,68 +244,69 @@ func computeCacheKey(slot primitives.Slot, proposerIndex primitives.ValidatorInd
 }
 
 type dataColumnLogEntry struct {
-	Slot            primitives.Slot
-	ColIdx          uint64
-	PropIdx         primitives.ValidatorIndex
-	BlockRoot       [32]byte
-	ParentRoot      [32]byte
-	PeerSuffix      string
-	PeerGossipScore float64
-	validationTime  time.Duration
-	sinceStartTime  time.Duration
+	slot           primitives.Slot
+	index          uint64
+	root           [32]byte
+	validationTime time.Duration
+	sinceStartTime time.Duration
 }
 
 func (s *Service) processDataColumnLogs() {
 	ticker := time.NewTicker(1 * time.Second)
-	defer ticker.Stop()
-
-	slotStats := make(map[primitives.Slot][fieldparams.NumberOfColumns]dataColumnLogEntry)
+	slotStats := make(map[[fieldparams.RootLength]byte][]dataColumnLogEntry)
 
 	for {
 		select {
-		case entry := <-s.dataColumnLogCh:
-			cols := slotStats[entry.Slot]
-			cols[entry.ColIdx] = entry
-			slotStats[entry.Slot] = cols
+		case col := <-s.dataColumnLogCh:
+			cols := slotStats[col.root]
+			cols = append(cols, col)
+			slotStats[col.root] = cols
 		case <-ticker.C:
-			for slot, columns := range slotStats {
-				var (
-					colIndices      = make([]uint64, 0, fieldparams.NumberOfColumns)
-					peers           = make([]string, 0, fieldparams.NumberOfColumns)
-					gossipScores    = make([]float64, 0, fieldparams.NumberOfColumns)
-					validationTimes = make([]string, 0, fieldparams.NumberOfColumns)
-					sinceStartTimes = make([]string, 0, fieldparams.NumberOfColumns)
-				)
+			for root, columns := range slotStats {
+				indices := make([]uint64, 0, fieldparams.NumberOfColumns)
+				minValidationTime, maxValidationTime, sumValidationTime := time.Duration(0), time.Duration(0), time.Duration(0)
+				minSinceStartTime, maxSinceStartTime, sumSinceStartTime := time.Duration(0), time.Duration(0), time.Duration(0)
 
 				totalReceived := 0
-				for _, entry := range columns {
-					if entry.PeerSuffix == "" {
+				for _, column := range columns {
+					indices = append(indices, column.index)
+
+					sumValidationTime += column.validationTime
+					sumSinceStartTime += column.sinceStartTime
+
+					if totalReceived == 0 {
+						minValidationTime, maxValidationTime = column.validationTime, column.validationTime
+						minSinceStartTime, maxSinceStartTime = column.sinceStartTime, column.sinceStartTime
+						totalReceived++
 						continue
 					}
-					colIndices = append(colIndices, entry.ColIdx)
-					peers = append(peers, entry.PeerSuffix)
-					gossipScores = append(gossipScores, roundFloat(entry.PeerGossipScore, 2))
-					validationTimes = append(validationTimes, fmt.Sprintf("%.2fms", float64(entry.validationTime.Milliseconds())))
-					sinceStartTimes = append(sinceStartTimes, fmt.Sprintf("%.2fms", float64(entry.sinceStartTime.Milliseconds())))
+
+					minValidationTime, maxValidationTime = min(minValidationTime, column.validationTime), max(maxValidationTime, column.validationTime)
+					minSinceStartTime, maxSinceStartTime = min(minSinceStartTime, column.sinceStartTime), max(maxSinceStartTime, column.sinceStartTime)
 					totalReceived++
 				}
 
-				log.WithFields(logrus.Fields{
-					"slot":            slot,
-					"receivedCount":   totalReceived,
-					"columnIndices":   colIndices,
-					"peers":           peers,
-					"gossipScores":    gossipScores,
-					"validationTimes": validationTimes,
-					"sinceStartTimes": sinceStartTimes,
-				}).Debug("Accepted data column sidecars summary")
+				if totalReceived > 0 {
+					slices.Sort(indices)
+					avgValidationTime := sumValidationTime / time.Duration(totalReceived)
+					avgSinceStartTime := sumSinceStartTime / time.Duration(totalReceived)
+
+					log.WithFields(logrus.Fields{
+						"slot":           columns[0].slot,
+						"root":           fmt.Sprintf("%#x", root),
+						"count":          totalReceived,
+						"indices":        helpers.PrettySlice(indices),
+						"validationTime": prettyMinMaxAverage(minValidationTime, maxValidationTime, avgValidationTime),
+						"sinceStartTime": prettyMinMaxAverage(minSinceStartTime, maxSinceStartTime, avgSinceStartTime),
+					}).Debug("Accepted data column sidecars summary")
+				}
 			}
-			slotStats = make(map[primitives.Slot][fieldparams.NumberOfColumns]dataColumnLogEntry)
+
+			slotStats = make(map[[fieldparams.RootLength]byte][]dataColumnLogEntry)
 		}
 	}
 }
 
-func roundFloat(f float64, decimals int) float64 {
-	mult := math.Pow(10, float64(decimals))
-	return math.Round(f*mult) / mult
+func prettyMinMaxAverage(min, max, average time.Duration) string {
+	return fmt.Sprintf("[min: %v, avg: %v, max: %v]", min, average, max)
 }

beacon-chain/verification/blob_test.go

@@ -687,6 +687,12 @@ func sbrNotFound(t *testing.T, expectedRoot [32]byte) *mockStateByRooter {
 	}}
 }
 
+func sbrReturnsState(st state.BeaconState) *mockStateByRooter {
+	return &mockStateByRooter{sbr: func(_ context.Context, _ [32]byte) (state.BeaconState, error) {
+		return st, nil
+	}}
+}
+
 func sbrForValOverride(idx primitives.ValidatorIndex, val *ethpb.Validator) *mockStateByRooter {
 	return sbrForValOverrideWithT(nil, idx, val)
 }

beacon-chain/verification/data_column.go

@@ -11,12 +11,10 @@ import (
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/transition"
-	forkchoicetypes "github.com/OffchainLabs/prysm/v7/beacon-chain/forkchoice/types"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
 	fieldparams "github.com/OffchainLabs/prysm/v7/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v7/config/params"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
-	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v7/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v7/runtime/logging"
 	"github.com/OffchainLabs/prysm/v7/time/slots"
@@ -484,88 +482,19 @@ func (dv *RODataColumnsVerifier) SidecarProposerExpected(ctx context.Context) (e
 
 	defer dv.recordResult(RequireSidecarProposerExpected, &err)
 
-	type slotParentRoot struct {
-		slot       primitives.Slot
-		parentRoot [fieldparams.RootLength]byte
-	}
-
-	targetRootBySlotParentRoot := make(map[slotParentRoot][fieldparams.RootLength]byte)
-
-	var targetRootFromCache = func(slot primitives.Slot, parentRoot [fieldparams.RootLength]byte) ([fieldparams.RootLength]byte, error) {
-		// Use cached values if available.
-		slotParentRoot := slotParentRoot{slot: slot, parentRoot: parentRoot}
-		if root, ok := targetRootBySlotParentRoot[slotParentRoot]; ok {
-			return root, nil
-		}
-
-		// Compute the epoch of the data column slot.
-		dataColumnEpoch := slots.ToEpoch(slot)
-		if dataColumnEpoch > 0 {
-			dataColumnEpoch = dataColumnEpoch - 1
-		}
-
-		// Compute the target root for the epoch.
-		targetRoot, err := dv.fc.TargetRootForEpoch(parentRoot, dataColumnEpoch)
-		if err != nil {
-			return [fieldparams.RootLength]byte{}, columnErrBuilder(errors.Wrap(err, "target root from epoch"))
-		}
-
-		// Store the target root in the cache.
-		targetRootBySlotParentRoot[slotParentRoot] = targetRoot
-
-		return targetRoot, nil
-	}
-
 	for _, dataColumn := range dv.dataColumns {
-		// Extract the slot of the data column.
 		dataColumnSlot := dataColumn.Slot()
 
-		// Extract the root of the parent block corresponding to the data column.
-		parentRoot := dataColumn.ParentRoot()
-
-		// Compute the target root for the data column.
-		targetRoot, err := targetRootFromCache(dataColumnSlot, parentRoot)
+		// Get the verifying state, it is guaranteed to have the correct proposer in the lookahead.
+		verifyingState, err := dv.getVerifyingState(ctx, dataColumn)
 		if err != nil {
-			return columnErrBuilder(errors.Wrap(err, "target root"))
+			return columnErrBuilder(errors.Wrap(err, "verifying state"))
 		}
 
-		// Compute the epoch of the data column slot.
-		dataColumnEpoch := slots.ToEpoch(dataColumnSlot)
-		if dataColumnEpoch > 0 {
-			dataColumnEpoch = dataColumnEpoch - 1
-		}
-
-		// Create a checkpoint for the target root.
-		checkpoint := &forkchoicetypes.Checkpoint{Root: targetRoot, Epoch: dataColumnEpoch}
-
-		// Try to extract the proposer index from the data column in the cache.
-		idx, cached := dv.pc.Proposer(checkpoint, dataColumnSlot)
-
-		if !cached {
-			parentRoot := dataColumn.ParentRoot()
-			// Ensure the expensive index computation is only performed once for
-			// concurrent requests for the same signature data.
-			idxAny, err, _ := dv.sg.Do(concatRootSlot(parentRoot, dataColumnSlot), func() (any, error) {
-				verifyingState, err := dv.getVerifyingState(ctx, dataColumn)
-				if err != nil {
-					return nil, columnErrBuilder(errors.Wrap(err, "verifying state"))
-				}
-
-				idx, err = helpers.BeaconProposerIndexAtSlot(ctx, verifyingState, dataColumnSlot)
-				if err != nil {
-					return nil, columnErrBuilder(errors.Wrap(err, "compute proposer"))
-				}
-
-				return idx, nil
-			})
-			if err != nil {
-				return err
-			}
-
-			var ok bool
-			if idx, ok = idxAny.(primitives.ValidatorIndex); !ok {
-				return columnErrBuilder(errors.New("type assertion to ValidatorIndex failed"))
-			}
+		// Use proposer lookahead directly
+		idx, err := helpers.BeaconProposerIndexAtSlot(ctx, verifyingState, dataColumnSlot)
+		if err != nil {
+			return columnErrBuilder(errors.Wrap(err, "proposer from lookahead"))
 		}
 
 		if idx != dataColumn.ProposerIndex() {
@@ -626,7 +555,3 @@ func inclusionProofKey(c blocks.RODataColumn) ([32]byte, error) {
 
 	return sha256.Sum256(unhashedKey), nil
 }
-
-func concatRootSlot(root [fieldparams.RootLength]byte, slot primitives.Slot) string {
-	return string(root[:]) + fmt.Sprintf("%d", slot)
-}

beacon-chain/verification/data_column_test.go

@@ -2,7 +2,6 @@ package verification
 
 import (
 	"reflect"
-	"sync"
 	"testing"
 	"time"
 
@@ -795,87 +794,90 @@ func TestDataColumnsSidecarProposerExpected(t *testing.T) {
 		blobCount  = 1
 	)
 
-	parentRoot := [fieldparams.RootLength]byte{}
-	columns := GenerateTestDataColumns(t, parentRoot, columnSlot, blobCount)
-	firstColumn := columns[0]
 	ctx := t.Context()
-	testCases := []struct {
-		name          string
-		stateByRooter StateByRooter
-		proposerCache proposerCache
-		columns       []blocks.RODataColumn
-		error         string
-	}{
-		{
-			name:          "Cached, matches",
-			stateByRooter: nil,
-			proposerCache: &mockProposerCache{
-				ProposerCB: pcReturnsIdx(firstColumn.ProposerIndex()),
-			},
-			columns: columns,
-		},
-		{
-			name:          "Cached, does not match",
-			stateByRooter: nil,
-			proposerCache: &mockProposerCache{
-				ProposerCB: pcReturnsIdx(firstColumn.ProposerIndex() + 1),
-			},
-			columns: columns,
-			error:   errSidecarUnexpectedProposer.Error(),
-		},
-		{
-			name:          "Not cached, state lookup failure",
-			stateByRooter: sbrNotFound(t, firstColumn.ParentRoot()),
-			proposerCache: &mockProposerCache{
-				ProposerCB: pcReturnsNotFound(),
-			},
-			columns: columns,
-			error:   "verifying state",
-		},
-	}
+	parentRoot := [fieldparams.RootLength]byte{}
 
-	for _, tc := range testCases {
-		t.Run(tc.name, func(t *testing.T) {
-			initializer := Initializer{
-				shared: &sharedResources{
-					sr:  tc.stateByRooter,
-					pc:  tc.proposerCache,
-					hsp: &mockHeadStateProvider{},
-					fc: &mockForkchoicer{
-						TargetRootForEpochCB: fcReturnsTargetRoot([fieldparams.RootLength]byte{}),
-					},
+	// Create a Fulu state to get the expected proposer from the lookahead.
+	fuluState, _ := util.DeterministicGenesisStateFulu(t, 32)
+	expectedProposer, err := fuluState.ProposerLookahead()
+	require.NoError(t, err)
+	expectedProposerIdx := primitives.ValidatorIndex(expectedProposer[columnSlot])
+
+	// Generate data columns with the expected proposer index.
+	matchingColumns := generateTestDataColumnsWithProposer(t, parentRoot, columnSlot, blobCount, expectedProposerIdx)
+	// Generate data columns with wrong proposer index.
+	wrongColumns := generateTestDataColumnsWithProposer(t, parentRoot, columnSlot, blobCount, expectedProposerIdx+1)
+
+	t.Run("Proposer matches", func(t *testing.T) {
+		initializer := Initializer{
+			shared: &sharedResources{
+				sr: sbrReturnsState(fuluState),
+				hsp: &mockHeadStateProvider{
+					headRoot:          parentRoot[:],
+					headSlot:          columnSlot, // Same epoch so HeadStateReadOnly is used
+					headStateReadOnly: fuluState,
 				},
-			}
+				fc: &mockForkchoicer{},
+			},
+		}
 
-			verifier := initializer.NewDataColumnsVerifier(tc.columns, GossipDataColumnSidecarRequirements)
-			var wg sync.WaitGroup
+		verifier := initializer.NewDataColumnsVerifier(matchingColumns, GossipDataColumnSidecarRequirements)
+		err := verifier.SidecarProposerExpected(ctx)
+		require.NoError(t, err)
+		require.Equal(t, true, verifier.results.executed(RequireSidecarProposerExpected))
+		require.NoError(t, verifier.results.result(RequireSidecarProposerExpected))
+	})
 
-			var err1, err2 error
-			wg.Go(func() {
-				err1 = verifier.SidecarProposerExpected(ctx)
-			})
-			wg.Go(func() {
-				err2 = verifier.SidecarProposerExpected(ctx)
-			})
-			wg.Wait()
+	t.Run("Proposer does not match", func(t *testing.T) {
+		initializer := Initializer{
+			shared: &sharedResources{
+				sr: sbrReturnsState(fuluState),
+				hsp: &mockHeadStateProvider{
+					headRoot:          parentRoot[:],
+					headSlot:          columnSlot, // Same epoch so HeadStateReadOnly is used
+					headStateReadOnly: fuluState,
+				},
+				fc: &mockForkchoicer{},
+			},
+		}
 
-			require.Equal(t, true, verifier.results.executed(RequireSidecarProposerExpected))
+		verifier := initializer.NewDataColumnsVerifier(wrongColumns, GossipDataColumnSidecarRequirements)
+		err := verifier.SidecarProposerExpected(ctx)
+		require.ErrorContains(t, errSidecarUnexpectedProposer.Error(), err)
+		require.Equal(t, true, verifier.results.executed(RequireSidecarProposerExpected))
+		require.NotNil(t, verifier.results.result(RequireSidecarProposerExpected))
+	})
 
-			if len(tc.error) > 0 {
-				require.ErrorContains(t, tc.error, err1)
-				require.ErrorContains(t, tc.error, err2)
-				require.NotNil(t, verifier.results.result(RequireSidecarProposerExpected))
-				return
-			}
+	t.Run("State lookup failure", func(t *testing.T) {
+		columns := GenerateTestDataColumns(t, parentRoot, columnSlot, blobCount)
+		initializer := Initializer{
+			shared: &sharedResources{
+				sr:  sbrNotFound(t, columns[0].ParentRoot()),
+				hsp: &mockHeadStateProvider{},
+				fc:  &mockForkchoicer{},
+			},
+		}
 
-			require.NoError(t, err1)
-			require.NoError(t, err2)
-			require.NoError(t, verifier.results.result(RequireSidecarProposerExpected))
+		verifier := initializer.NewDataColumnsVerifier(columns, GossipDataColumnSidecarRequirements)
+		err := verifier.SidecarProposerExpected(ctx)
+		require.ErrorContains(t, "verifying state", err)
+		require.Equal(t, true, verifier.results.executed(RequireSidecarProposerExpected))
+		require.NotNil(t, verifier.results.result(RequireSidecarProposerExpected))
+	})
+}
 
-			err := verifier.SidecarProposerExpected(ctx)
-			require.NoError(t, err)
-		})
+func generateTestDataColumnsWithProposer(t *testing.T, parent [fieldparams.RootLength]byte, slot primitives.Slot, blobCount int, proposer primitives.ValidatorIndex) []blocks.RODataColumn {
+	roBlock, roBlobs := util.GenerateTestDenebBlockWithSidecar(t, parent, slot, blobCount, util.WithProposer(proposer))
+	blobs := make([]kzg.Blob, 0, len(roBlobs))
+	for i := range roBlobs {
+		blobs = append(blobs, kzg.Blob(roBlobs[i].Blob))
 	}
+
+	cellsPerBlob, proofsPerBlob := util.GenerateCellsAndProofs(t, blobs)
+	roDataColumnSidecars, err := peerdas.DataColumnSidecars(cellsPerBlob, proofsPerBlob, peerdas.PopulateFromBlock(roBlock))
+	require.NoError(t, err)
+
+	return roDataColumnSidecars
 }
 
 func TestColumnRequirementSatisfaction(t *testing.T) {
@@ -922,12 +924,3 @@ func TestColumnRequirementSatisfaction(t *testing.T) {
 	require.NoError(t, err)
 }
 
-func TestConcatRootSlot(t *testing.T) {
-	root := [fieldparams.RootLength]byte{1, 2, 3}
-	const slot = primitives.Slot(3210)
-
-	const expected = "\x01\x02\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x003210"
-
-	actual := concatRootSlot(root, slot)
-	require.Equal(t, expected, actual)
-}

changelog/james-prysm_fulu-e2e.md

@@ -0,0 +1,11 @@
+### Added
+
+- Adding basic fulu fork transition support for mainnet and minimal e2e tests (multi scenario is not included)
+
+### Changed
+
+- updated go ethereum to 1.16.7
+
+### Removed
+
+- removed github.com/MariusVanDerWijden/FuzzyVM and github.com/MariusVanDerWijden/tx-fuzz due to lack of support post 1.16.7, only used in e2e for transaction fuzzing

changelog/kasey_fix-backfill-flag.md

@@ -0,0 +1,2 @@
+#### Fixed
+- Fix validation logic for `--backfill-oldest-slot`, which was rejecting slots newer than 1056767.

changelog/manu-cache-warmup.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Data column sidecars cache warmup: Process in parallel all sidecars for a given epoch.

changelog/manu-log.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Summarize DEBUG log corresponding to incoming via gossip data column sidecar.

changelog/potuz_dcs_pc_removal.md

@@ -0,0 +1,2 @@
+### Changed
+- Use lookahead to validate data column sidecar proposer index.

changelog/potuz_dont_lock_fcu.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Notify the engine about forkchoice updates in the background. 

changelog/potuz_fcu_ctx.md

@@ -0,0 +1,2 @@
+### Changed
+- Use a separate context when updating the slot cache. 

changelog/potuz_no_fcu_on_batches.md

@@ -0,0 +1,2 @@
+### Ignored
+- D  not send FCU on block batches. 

changelog/potuz_remove_signature_check.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Do not check block signature on state transition. 

changelog/potuz_use_head_previous_epoch.md

@@ -0,0 +1,3 @@
+### Added
+
+- Use the head state to validate attestations for the previous epoch if head is compatible with the target checkpoint.

changelog/radek_extend-http-analyzer.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Extend `httperror` analyzer to more functions.

changelog/sashass1315_fix-panic.md

@@ -0,0 +1,3 @@
+### Fixed
+
+- avoid panic when fork schedule is empty [#16175](https://github.com/OffchainLabs/prysm/pull/16175)

changelog/satushh-consolidation.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Performance improvement in ProcessConsolidationRequests: Use more performance HasPendingBalanceToWithdraw instead of PendingBalanceToWithdraw as no need to calculate full total pending balance. 

config/params/testdata/e2e_config.yaml

@@ -49,7 +49,7 @@ ELECTRA_FORK_VERSION: 0x050000fd
 ELECTRA_FORK_EPOCH: 14
 # Fulu
 FULU_FORK_VERSION: 0x060000fd
-FULU_FORK_EPOCH: 18446744073709551615
+FULU_FORK_EPOCH: 16
 
 
 # Time parameters
@@ -122,7 +122,7 @@ MIN_SYNC_COMMITTEE_PARTICIPANTS: 1
 # Other e2e overrides
 # ---------------------------------------------------------------
 CONFIG_NAME: "end-to-end"
-SLOTS_PER_EPOCH: 6
+SLOTS_PER_EPOCH: 8
 EPOCHS_PER_ETH1_VOTING_PERIOD: 2
 MAX_SEED_LOOKAHEAD: 1
 
@@ -136,3 +136,8 @@ BLOB_SCHEDULE:
   # Electra
   - EPOCH: 14
     MAX_BLOBS_PER_BLOCK: 9
+  # BPO (Blob Parameter Optimization) schedule for Fulu
+  - EPOCH: 17
+    MAX_BLOBS_PER_BLOCK: 15
+  - EPOCH: 18
+    MAX_BLOBS_PER_BLOCK: 21

config/params/testnet_e2e_config.go

@@ -1,14 +1,12 @@
 package params
 
-import "math"
-
 const (
 	AltairE2EForkEpoch    = 6
 	BellatrixE2EForkEpoch = 8
 	CapellaE2EForkEpoch   = 10
 	DenebE2EForkEpoch     = 12
 	ElectraE2EForkEpoch   = 14
-	FuluE2EForkEpoch      = math.MaxUint64
+	FuluE2EForkEpoch      = 16
 )
 
 // E2ETestConfig retrieves the configurations made specifically for E2E testing.
@@ -28,7 +26,7 @@ func E2ETestConfig() *BeaconChainConfig {
 	// Time parameters.
 	e2eConfig.SecondsPerSlot = 10
 	e2eConfig.SlotDurationMilliseconds = 10000
-	e2eConfig.SlotsPerEpoch = 6
+	e2eConfig.SlotsPerEpoch = 8
 	e2eConfig.SqrRootSlotsPerEpoch = 2
 	e2eConfig.SecondsPerETH1Block = 2
 	e2eConfig.EpochsPerEth1VotingPeriod = 2
@@ -64,6 +62,9 @@ func E2ETestConfig() *BeaconChainConfig {
 	e2eConfig.BlobSchedule = []BlobScheduleEntry{
 		{Epoch: e2eConfig.DenebForkEpoch, MaxBlobsPerBlock: uint64(e2eConfig.DeprecatedMaxBlobsPerBlock)},
 		{Epoch: e2eConfig.ElectraForkEpoch, MaxBlobsPerBlock: uint64(e2eConfig.DeprecatedMaxBlobsPerBlockElectra)},
+		// BPO (Blob Parameter Optimization) schedule for Fulu
+		{Epoch: e2eConfig.FuluForkEpoch + 1, MaxBlobsPerBlock: 15},
+		{Epoch: e2eConfig.FuluForkEpoch + 2, MaxBlobsPerBlock: 21},
 	}
 
 	e2eConfig.InitializeForkSchedule()
@@ -119,6 +120,9 @@ func E2EMainnetTestConfig() *BeaconChainConfig {
 	e2eConfig.BlobSchedule = []BlobScheduleEntry{
 		{Epoch: e2eConfig.DenebForkEpoch, MaxBlobsPerBlock: uint64(e2eConfig.DeprecatedMaxBlobsPerBlock)},
 		{Epoch: e2eConfig.ElectraForkEpoch, MaxBlobsPerBlock: uint64(e2eConfig.DeprecatedMaxBlobsPerBlockElectra)},
+		// BPO (Blob Parameter Optimization) schedule for Fulu
+		{Epoch: e2eConfig.FuluForkEpoch + 1, MaxBlobsPerBlock: 15},
+		{Epoch: e2eConfig.FuluForkEpoch + 2, MaxBlobsPerBlock: 21},
 	}
 
 	e2eConfig.InitializeForkSchedule()

deps.bzl

@@ -301,8 +301,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_bits_and_blooms_bitset",
         importpath = "github.com/bits-and-blooms/bitset",
-        sum = "h1:1X2TS7aHz1ELcC0yU1y2stUs/0ig5oMU6STFZGrhvHI=",
-        version = "v1.17.0",
+        sum = "h1:Tquv9S8+SGaS3EhyA+up3FXzmkhxPGjQQCkcs2uw7w4=",
+        version = "v1.22.0",
     )
     go_repository(
         name = "com_github_bradfitz_go_smtpd",
@@ -482,8 +482,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_cockroachdb_pebble",
         importpath = "github.com/cockroachdb/pebble",
-        sum = "h1:CUh2IPtR4swHlEj48Rhfzw6l/d0qA31fItcIszQVIsA=",
-        version = "v1.1.2",
+        sum = "h1:5AAWCBWbat0uE0blr8qzufZP5tBjkRyy/jWe1QWLnvw=",
+        version = "v1.1.5",
     )
     go_repository(
         name = "com_github_cockroachdb_redact",
@@ -512,14 +512,16 @@ def prysm_deps():
     go_repository(
         name = "com_github_consensys_bavard",
         importpath = "github.com/consensys/bavard",
-        sum = "h1:Uw2CGvbXSZWhqK59X0VG/zOjpTFuOMcPLStrp1ihI0A=",
-        version = "v0.1.22",
+        sum = "h1:dTlIwEdFQmldzFf5F6bbTcYWhvnAgZai2g8eq3Wwxqg=",
+        version = "v0.1.31-0.20250406004941-2db259e4b582",
     )
     go_repository(
         name = "com_github_consensys_gnark_crypto",
         importpath = "github.com/consensys/gnark-crypto",
-        sum = "h1:DDBdl4HaBtdQsq/wfMwJvZNE80sHidrK3Nfrefatm0E=",
-        version = "v0.14.0",
+        patch_args = ["-p1"],
+        patches = ["//third_party:com_github_consensys_gnark_crypto.patch"],
+        sum = "h1:vIye/FqI50VeAr0B3dx+YjeIvmc3LWz4yEfbWBpTUf0=",
+        version = "v0.18.0",
     )
     go_repository(
         name = "com_github_containerd_cgroups",
@@ -555,8 +557,14 @@ def prysm_deps():
     go_repository(
         name = "com_github_cpuguy83_go_md2man_v2",
         importpath = "github.com/cpuguy83/go-md2man/v2",
-        sum = "h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB0alcyc=",
-        version = "v2.0.5",
+        sum = "h1:zbFlGlXEAKlwXpmvle3d8Oe3YnkKIK4xSRTd3sHPnBo=",
+        version = "v2.0.7",
+    )
+    go_repository(
+        name = "com_github_crate_crypto_go_eth_kzg",
+        importpath = "github.com/crate-crypto/go-eth-kzg",
+        sum = "h1:WzDGjHk4gFg6YzV0rJOAsTK4z3Qkz5jd4RE3DAvPFkg=",
+        version = "v1.4.0",
     )
     go_repository(
         name = "com_github_crate_crypto_go_ipa",
@@ -591,8 +599,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_datadog_zstd",
         importpath = "github.com/DataDog/zstd",
-        sum = "h1:oWf5W7GtOLgp6bciQYDmhHHjdhYkALu6S/5Ni9ZgSvQ=",
-        version = "v1.5.5",
+        sum = "h1:ybO8RBeh29qrxIhCA9E8gKY6xfONU9T6G6aP9DTKfLE=",
+        version = "v1.5.7",
     )
     go_repository(
         name = "com_github_davecgh_go_spew",
@@ -606,23 +614,29 @@ def prysm_deps():
         sum = "h1:pFUpOrbxDR6AkioZ1ySsx5yxlDQZ8stG2b88gTPxgJU=",
         version = "v0.0.0-20200604182044-b73af7476f6c",
     )
+    go_repository(
+        name = "com_github_dchest_siphash",
+        importpath = "github.com/dchest/siphash",
+        sum = "h1:QXwFc8cFOR2dSa/gE6o/HokBMWtLUaNDVd+22aKHeEA=",
+        version = "v1.2.3",
+    )
     go_repository(
         name = "com_github_deckarep_golang_set_v2",
         importpath = "github.com/deckarep/golang-set/v2",
-        sum = "h1:XfcQbWM1LlMB8BsJ8N9vW5ehnnPVIw0je80NsVHagjM=",
-        version = "v2.6.0",
+        sum = "h1:swm0rlPCmdWn9mESxKOjWk8hXSqoxOp+ZlfuyaAdFlQ=",
+        version = "v2.8.0",
     )
     go_repository(
         name = "com_github_decred_dcrd_crypto_blake256",
         importpath = "github.com/decred/dcrd/crypto/blake256",
-        sum = "h1:7PltbUIQB7u/FfZ39+DGa/ShuMyJ5ilcvdfma9wOH6Y=",
-        version = "v1.0.1",
+        sum = "h1:zPMNGQCm0g4QTY27fOCorQW7EryeQ/U0x++OzVrdms8=",
+        version = "v1.1.0",
     )
     go_repository(
         name = "com_github_decred_dcrd_dcrec_secp256k1_v4",
         importpath = "github.com/decred/dcrd/dcrec/secp256k1/v4",
-        sum = "h1:rpfIENRNNilwHwZeG5+P150SMrnNEcHYvcCuK6dPZSg=",
-        version = "v4.3.0",
+        sum = "h1:NMZiJj8QnKe1LgsbDayM4UoHwbvwDRwnI3hwNaAHRnc=",
+        version = "v4.4.0",
     )
     go_repository(
         name = "com_github_deepmap_oapi_codegen",
@@ -735,8 +749,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_emicklei_dot",
         importpath = "github.com/emicklei/dot",
-        sum = "h1:Ase39UD9T9fRBOb5ptgpixrxfx8abVzNWZi2+lr53PI=",
-        version = "v0.11.0",
+        sum = "h1:08GN+DD79cy/tzN6uLCT84+2Wk9u+wvqP+Hkx/dIR8A=",
+        version = "v1.6.2",
     )
     go_repository(
         name = "com_github_emicklei_go_restful_v3",
@@ -779,6 +793,12 @@ def prysm_deps():
         sum = "h1:aVtoLK5xwJ6c5RiqO8g8ptJ5KU+2Hdquf6G3aXiHh5s=",
         version = "v2.1.5",
     )
+    go_repository(
+        name = "com_github_ethereum_go_bigmodexpfix",
+        importpath = "github.com/ethereum/go-bigmodexpfix",
+        sum = "h1:rvv6MJhy07IMfEKuARQ9TKojGqLVNxQajaXEp/BoqSk=",
+        version = "v0.0.0-20250911101455-f9e208c548ab",
+    )
     go_repository(
         name = "com_github_ethereum_go_ethereum",
         build_directives = [
@@ -790,8 +810,8 @@ def prysm_deps():
         patches = [
             "//third_party:com_github_ethereum_go_ethereum_secp256k1.patch",
         ],
-        sum = "h1:bRra1zi+/q+qyXZ6fylZOrlaF8kDdnlTtzNTmNHfX+g=",
-        version = "v1.15.9",
+        sum = "h1:qeM4TvbrWK0UC0tgkZ7NiRsmBGwsjqc64BHo20U59UQ=",
+        version = "v1.16.7",
     )
     go_repository(
         name = "com_github_ethereum_go_verkle",
@@ -832,8 +852,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_ferranbt_fastssz",
         importpath = "github.com/ferranbt/fastssz",
-        sum = "h1:ZI+z3JH05h4kgmFXdHuR1aWYsgrg7o+Fw7/NCzM16Mo=",
-        version = "v0.1.3",
+        sum = "h1:OCDB+dYDEQDvAgtAGnTSidK1Pe2tW3nFV40XyMkTeDY=",
+        version = "v0.1.4",
     )
     go_repository(
         name = "com_github_fjl_gencodec",
@@ -919,12 +939,6 @@ def prysm_deps():
         sum = "h1:f6D9Hr8xV8uYKlyuj8XIruxlh9WjVjdh1gIicAS7ays=",
         version = "v0.0.0-20191108122812-4678299bea08",
     )
-    go_repository(
-        name = "com_github_gballet_go_verkle",
-        importpath = "github.com/gballet/go-verkle",
-        sum = "h1:BAIP2GihuqhwdILrV+7GJel5lyPV3u1+PgzrWLc0TkE=",
-        version = "v0.1.1-0.20231031103413-a67434b50f46",
-    )
     go_repository(
         name = "com_github_gdamore_encoding",
         importpath = "github.com/gdamore/encoding",
@@ -1132,8 +1146,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_gofrs_flock",
         importpath = "github.com/gofrs/flock",
-        sum = "h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=",
-        version = "v0.8.1",
+        sum = "h1:MTLVXXHf8ekldpJk3AKicLij9MdwOWkZ+a/jHHZby9E=",
+        version = "v0.12.1",
     )
     go_repository(
         name = "com_github_gogo_googleapis",
@@ -1200,8 +1214,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_golang_snappy",
         importpath = "github.com/golang/snappy",
-        sum = "h1:4bw4WeyTYPp0smaXiJZCNnLrvVBqirQVreixayXezGc=",
-        version = "v0.0.5-0.20231225225746-43d5d4cd4e0e",
+        sum = "h1:Oy607GVXHs7RtbggtPBnr2RmDArIsAefDwvrdWvRhGs=",
+        version = "v1.0.0",
     )
     go_repository(
         name = "com_github_golangci_lint_1",
@@ -1275,12 +1289,6 @@ def prysm_deps():
         sum = "h1:GOZbcHa3HfsPKPlmyPyN2KEohoMXOhdMbHrvbpl2QaA=",
         version = "v0.1.0",
     )
-    go_repository(
-        name = "com_github_google_subcommands",
-        importpath = "github.com/google/subcommands",
-        sum = "h1:vWQspBTo2nEqTUFita5/KeEWlUL8kQObDFbub/EN9oE=",
-        version = "v1.2.0",
-    )
     go_repository(
         name = "com_github_google_uuid",
         importpath = "github.com/google/uuid",
@@ -1542,8 +1550,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_holiman_billy",
         importpath = "github.com/holiman/billy",
-        sum = "h1:X4egAf/gcS1zATw6wn4Ej8vjuVGxeHdan+bRb2ebyv4=",
-        version = "v0.0.0-20240216141850-2abb0c79d3c4",
+        sum = "h1:IZUYC/xb3giYwBLMnr8d0TGTzPKFGNTCGgGLoyeX330=",
+        version = "v0.0.0-20250707135307-f2f9b9aae7db",
     )
     go_repository(
         name = "com_github_holiman_bloomfilter_v2",
@@ -1554,8 +1562,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_holiman_goevmlab",
         importpath = "github.com/holiman/goevmlab",
-        sum = "h1:JHZ8k9n9G9KXIo1qrvK5Cxah6ax5BR0qVTA9bFYl1oM=",
-        version = "v0.0.0-20241121133100-cfa6b078c8c4",
+        sum = "h1:krEMViaomzuBfH/L1V4b8w2lVfsEpUbxH1ZJQpUaT6E=",
+        version = "v0.0.0-20250515153315-ab84907ebdb2",
     )
     go_repository(
         name = "com_github_holiman_uint256",
@@ -1850,8 +1858,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_klauspost_compress",
         importpath = "github.com/klauspost/compress",
-        sum = "h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=",
-        version = "v1.17.11",
+        sum = "h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=",
+        version = "v1.18.0",
     )
     go_repository(
         name = "com_github_klauspost_cpuid",
@@ -2104,18 +2112,6 @@ def prysm_deps():
         sum = "h1:3l11YT8tm9MnwGFQ4kETwkzpAwY2Jt9lCrumCUW4+z4=",
         version = "v0.7.0",
     )
-    go_repository(
-        name = "com_github_mariusvanderwijden_fuzzyvm",
-        importpath = "github.com/MariusVanDerWijden/FuzzyVM",
-        sum = "h1:RQtzNvriR3Yu5CvVBTJPwDmfItBT90TWZ3fFondhc08=",
-        version = "v0.0.0-20240516070431-7828990cad7d",
-    )
-    go_repository(
-        name = "com_github_mariusvanderwijden_tx_fuzz",
-        importpath = "github.com/MariusVanDerWijden/tx-fuzz",
-        sum = "h1:Tq4lXivsR8mtoP4RpasUDIUpDLHfN1YhFge/kzrzK78=",
-        version = "v1.4.0",
-    )
     go_repository(
         name = "com_github_marten_seemann_tcp",
         importpath = "github.com/marten-seemann/tcp",
@@ -2143,8 +2139,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_mattn_go_runewidth",
         importpath = "github.com/mattn/go-runewidth",
-        sum = "h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=",
-        version = "v0.0.15",
+        sum = "h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=",
+        version = "v0.0.16",
     )
     go_repository(
         name = "com_github_matttproud_golang_protobuf_extensions",
@@ -2257,8 +2253,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_mitchellh_mapstructure",
         importpath = "github.com/mitchellh/mapstructure",
-        sum = "h1:CpVNEelQCZBooIPDn+AR3NpivK/TIKU8bDxdASFVQag=",
-        version = "v1.4.1",
+        sum = "h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=",
+        version = "v1.5.0",
     )
     go_repository(
         name = "com_github_mitchellh_pointerstructure",
@@ -2272,12 +2268,6 @@ def prysm_deps():
         sum = "h1:SobOdjm2xLj1KkXN5/n0xTIWyZA2+s99UCY1iPfkHRY=",
         version = "v0.4.0",
     )
-    go_repository(
-        name = "com_github_mmcloughlin_profile",
-        importpath = "github.com/mmcloughlin/profile",
-        sum = "h1:jhDmAqPyebOsVDOCICJoINoLb/AnLBaUw58nFzxWS2w=",
-        version = "v0.1.1",
-    )
     go_repository(
         name = "com_github_moby_spdystream",
         importpath = "github.com/moby/spdystream",
@@ -2821,6 +2811,12 @@ def prysm_deps():
         sum = "h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=",
         version = "v1.1.0",
     )
+    go_repository(
+        name = "com_github_projectzkm_ziren_crates_go_runtime_zkvm_runtime",
+        importpath = "github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime",
+        sum = "h1:1zYrtlhrZ6/b6SAjLSfKzWtdgqK0U+HtH/VcBWh1BaU=",
+        version = "v0.0.0-20251001021608-1fe7b43fc4d6",
+    )
     go_repository(
         name = "com_github_prometheus_client_golang",
         importpath = "github.com/prometheus/client_golang",
@@ -3267,8 +3263,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_spf13_pflag",
         importpath = "github.com/spf13/pflag",
-        sum = "h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=",
-        version = "v1.0.5",
+        sum = "h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=",
+        version = "v1.0.6",
     )
     go_repository(
         name = "com_github_spf13_viper",
@@ -3384,14 +3380,14 @@ def prysm_deps():
     go_repository(
         name = "com_github_tklauser_go_sysconf",
         importpath = "github.com/tklauser/go-sysconf",
-        sum = "h1:GBUpcahXSpR2xN01jhkNAbTLRk2Yzgggk8IM08lq3r4=",
-        version = "v0.3.13",
+        sum = "h1:VE89k0criAymJ/Os65CSn1IXaol+1wrsFHEB8Ol49K4=",
+        version = "v0.3.15",
     )
     go_repository(
         name = "com_github_tklauser_numcpus",
         importpath = "github.com/tklauser/numcpus",
-        sum = "h1:yjuerZP127QG9m5Zh/mSO4wqurYil27tHrqwRoRjpr4=",
-        version = "v0.7.0",
+        sum = "h1:18njr6LDBk1zuna922MgdjQuJFjrdppsZG60sHGfjso=",
+        version = "v0.10.0",
     )
     go_repository(
         name = "com_github_tmc_grpc_websocket_proxy",
@@ -3411,12 +3407,6 @@ def prysm_deps():
         sum = "h1:YPXUKf7fYbp/y8xloBqZOw2qaVggbfwMlI8WM3wZUJ0=",
         version = "v1.2.7",
     )
-    go_repository(
-        name = "com_github_umbracle_gohashtree",
-        importpath = "github.com/umbracle/gohashtree",
-        sum = "h1:CQh33pStIp/E30b7TxDlXfM0145bn2e8boI30IxAhTg=",
-        version = "v0.0.2-alpha.0.20230207094856-5b775a815c10",
-    )
     go_repository(
         name = "com_github_urfave_cli",
         importpath = "github.com/urfave/cli",
@@ -3426,8 +3416,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_urfave_cli_v2",
         importpath = "github.com/urfave/cli/v2",
-        sum = "h1:WoHEJLdsXr6dDWoJgMq/CboDmyY/8HMMH1fTECbih+w=",
-        version = "v2.27.5",
+        sum = "h1:VdRdS98FNhKZ8/Az8B7MTyGQmpIr36O1EHybx/LaZ4g=",
+        version = "v2.27.6",
     )
     go_repository(
         name = "com_github_urfave_negroni",
@@ -3474,8 +3464,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_victoriametrics_fastcache",
         importpath = "github.com/VictoriaMetrics/fastcache",
-        sum = "h1:N0y9ASrJ0F6h0QaC3o6uJb3NIZ9VKLjCM7NQbSmF7WI=",
-        version = "v1.12.2",
+        sum = "h1:AW4mheMR5Vd9FkAPUv+NH6Nhw+fmbTMGMsNAoA/+4G0=",
+        version = "v1.13.0",
     )
     go_repository(
         name = "com_github_vividcortex_gohistogram",
@@ -3597,8 +3587,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_yusufpapurcu_wmi",
         importpath = "github.com/yusufpapurcu/wmi",
-        sum = "h1:E1ctvB7uKFMOJw3fdOW32DwGE9I7t++CRUEMKvFoFiw=",
-        version = "v1.2.3",
+        sum = "h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=",
+        version = "v1.2.4",
     )
     go_repository(
         name = "com_google_cloud_go",
@@ -4784,8 +4774,8 @@ def prysm_deps():
     go_repository(
         name = "org_golang_x_exp",
         importpath = "golang.org/x/exp",
-        sum = "h1:KL/ZBHXgKGVmuZBZ01Lt57yE5ws8ZPSkkihmEyq7FXc=",
-        version = "v0.0.0-20250128182459-e0ece0dbea4c",
+        sum = "h1:y5zboxd6LQAqYIhHnB48p0ByQ/GnQx2BE33L8BOHQkI=",
+        version = "v0.0.0-20250506013437-ce4c2cf36ca6",
     )
     go_repository(
         name = "org_golang_x_exp_typeparams",

go.mod

@@ -3,20 +3,18 @@ module github.com/OffchainLabs/prysm/v7
 go 1.25.1
 
 require (
-	github.com/MariusVanDerWijden/FuzzyVM v0.0.0-20240516070431-7828990cad7d
-	github.com/MariusVanDerWijden/tx-fuzz v1.4.0
 	github.com/OffchainLabs/go-bitfield v0.0.0-20251031151322-f427d04d8506
 	github.com/aristanetworks/goarista v0.0.0-20200805130819-fd197cf57d96
 	github.com/bazelbuild/rules_go v0.23.2
 	github.com/btcsuite/btcd/btcec/v2 v2.3.4
-	github.com/consensys/gnark-crypto v0.14.0
+	github.com/consensys/gnark-crypto v0.18.0
 	github.com/crate-crypto/go-kzg-4844 v1.1.0
 	github.com/d4l3k/messagediff v1.2.1
 	github.com/dgraph-io/ristretto/v2 v2.2.0
 	github.com/dustin/go-humanize v1.0.1
-	github.com/emicklei/dot v0.11.0
+	github.com/emicklei/dot v1.6.2
 	github.com/ethereum/c-kzg-4844/v2 v2.1.5
-	github.com/ethereum/go-ethereum v1.15.9
+	github.com/ethereum/go-ethereum v1.16.7
 	github.com/fsnotify/fsnotify v1.6.0
 	github.com/ghodss/yaml v1.0.0
 	github.com/go-yaml/yaml v2.1.0+incompatible
@@ -24,7 +22,7 @@ require (
 	github.com/golang-jwt/jwt/v4 v4.5.2
 	github.com/golang/gddo v0.0.0-20200528160355-8d077c1d8f4c
 	github.com/golang/protobuf v1.5.4
-	github.com/golang/snappy v0.0.5-0.20231225225746-43d5d4cd4e0e
+	github.com/golang/snappy v1.0.0
 	github.com/google/go-cmp v0.7.0
 	github.com/google/gofuzz v1.2.0
 	github.com/google/uuid v1.6.0
@@ -74,7 +72,7 @@ require (
 	github.com/thomaso-mirodin/intmath v0.0.0-20160323211736-5dc6d854e46e
 	github.com/trailofbits/go-mutexasserts v0.0.0-20250212181730-4c2b8e9e784b
 	github.com/tyler-smith/go-bip39 v1.1.0
-	github.com/urfave/cli/v2 v2.27.5
+	github.com/urfave/cli/v2 v2.27.6
 	github.com/uudashr/gocognit v1.0.5
 	github.com/wealdtech/go-bytesutil v1.1.1
 	github.com/wealdtech/go-eth2-util v1.6.3
@@ -89,7 +87,7 @@ require (
 	go.uber.org/automaxprocs v1.5.2
 	go.uber.org/mock v0.5.2
 	golang.org/x/crypto v0.44.0
-	golang.org/x/exp v0.0.0-20250128182459-e0ece0dbea4c
+	golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6
 	golang.org/x/sync v0.18.0
 	golang.org/x/tools v0.39.0
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1
@@ -105,12 +103,13 @@ require (
 
 require (
 	github.com/BurntSushi/toml v1.4.1-0.20240526193622-a339e1f7089c // indirect
-	github.com/DataDog/zstd v1.5.5 // indirect
+	github.com/DataDog/zstd v1.5.7 // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/VictoriaMetrics/fastcache v1.12.2 // indirect
+	github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251001021608-1fe7b43fc4d6 // indirect
+	github.com/VictoriaMetrics/fastcache v1.13.0 // indirect
 	github.com/benbjohnson/clock v1.3.5 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/bits-and-blooms/bitset v1.17.0 // indirect
+	github.com/bits-and-blooms/bitset v1.22.0 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cespare/cp v1.1.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
@@ -118,27 +117,28 @@ require (
 	github.com/cockroachdb/errors v1.11.3 // indirect
 	github.com/cockroachdb/fifo v0.0.0-20240606204812-0bbfbd93a7ce // indirect
 	github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b // indirect
-	github.com/cockroachdb/pebble v1.1.2 // indirect
+	github.com/cockroachdb/pebble v1.1.5 // indirect
 	github.com/cockroachdb/redact v1.1.5 // indirect
 	github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect
-	github.com/consensys/bavard v0.1.22 // indirect
 	github.com/containerd/cgroups v1.1.0 // indirect
 	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
-	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
+	github.com/crate-crypto/go-eth-kzg v1.4.0 // indirect
 	github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/davidlazar/go-crypto v0.0.0-20200604182044-b73af7476f6c // indirect
-	github.com/deckarep/golang-set/v2 v2.6.0 // indirect
-	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 // indirect
+	github.com/dchest/siphash v1.2.3 // indirect
+	github.com/deckarep/golang-set/v2 v2.8.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 // indirect
 	github.com/deepmap/oapi-codegen v1.8.2 // indirect
 	github.com/dlclark/regexp2 v1.7.0 // indirect
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/dop251/goja v0.0.0-20230806174421-c933cf95e127 // indirect
 	github.com/elastic/gosigar v0.14.3 // indirect
-	github.com/ethereum/c-kzg-4844 v1.0.0 // indirect
+	github.com/ethereum/go-bigmodexpfix v0.0.0-20250911101455-f9e208c548ab // indirect
 	github.com/ethereum/go-verkle v0.2.2 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/ferranbt/fastssz v0.1.3 // indirect
+	github.com/ferranbt/fastssz v0.1.4 // indirect
 	github.com/flynn/noise v1.1.0 // indirect
 	github.com/francoispqt/gojay v1.2.13 // indirect
 	github.com/getsentry/sentry-go v0.27.0 // indirect
@@ -148,7 +148,7 @@ require (
 	github.com/go-sourcemap/sourcemap v2.1.3+incompatible // indirect
 	github.com/go-task/slim-sprig/v3 v3.0.0 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
-	github.com/gofrs/flock v0.8.1 // indirect
+	github.com/gofrs/flock v0.12.1 // indirect
 	github.com/google/gopacket v1.1.19 // indirect
 	github.com/google/pprof v0.0.0-20250202011525-fc3143867406 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
@@ -156,9 +156,8 @@ require (
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1 // indirect
 	github.com/hashicorp/go-bexpr v0.1.10 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
-	github.com/holiman/billy v0.0.0-20240216141850-2abb0c79d3c4 // indirect
+	github.com/holiman/billy v0.0.0-20250707135307-f2f9b9aae7db // indirect
 	github.com/holiman/bloomfilter/v2 v2.0.3 // indirect
-	github.com/holiman/goevmlab v0.0.0-20241121133100-cfa6b078c8c4 // indirect
 	github.com/huin/goupnp v1.3.0 // indirect
 	github.com/influxdata/influxdb-client-go/v2 v2.4.0 // indirect
 	github.com/influxdata/influxdb1-client v0.0.0-20220302092344-a9ab5670611c // indirect
@@ -167,7 +166,7 @@ require (
 	github.com/jackpal/go-nat-pmp v1.0.2 // indirect
 	github.com/jbenet/go-temp-err-catcher v0.1.0 // indirect
 	github.com/juju/ansiterm v0.0.0-20180109212912-720a0952cc2a // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.9 // indirect
 	github.com/koron/go-ssdp v0.0.5 // indirect
 	github.com/kr/text v0.2.0 // indirect
@@ -184,15 +183,14 @@ require (
 	github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/miekg/dns v1.1.63 // indirect
 	github.com/mikioh/tcpinfo v0.0.0-20190314235526-30a79bb1804b // indirect
 	github.com/mikioh/tcpopt v0.0.0-20190314235656-172688c1accc // indirect
 	github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect
-	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/mitchellh/pointerstructure v1.2.0 // indirect
-	github.com/mmcloughlin/addchain v0.4.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/mr-tron/base58 v1.2.0 // indirect
@@ -248,12 +246,12 @@ require (
 	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7 // indirect
-	github.com/tklauser/go-sysconf v0.3.13 // indirect
-	github.com/tklauser/numcpus v0.7.0 // indirect
+	github.com/tklauser/go-sysconf v0.3.15 // indirect
+	github.com/tklauser/numcpus v0.10.0 // indirect
 	github.com/wealdtech/go-eth2-types/v2 v2.8.2 // indirect
 	github.com/wlynxg/anet v0.0.5 // indirect
 	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
-	github.com/yusufpapurcu/wmi v1.2.3 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.34.0 // indirect
 	go.opentelemetry.io/otel/metric v1.35.0 // indirect
@@ -275,7 +273,6 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
 	lukechampine.com/blake3 v1.3.0 // indirect
-	rsc.io/tmplfunc v0.0.3 // indirect
 	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect
 	sigs.k8s.io/yaml v1.3.0 // indirect

go.sum

@@ -48,22 +48,20 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/BurntSushi/toml v1.4.1-0.20240526193622-a339e1f7089c h1:pxW6RcqyfI9/kWtOwnv/G+AzdKuy2ZrqINhenH4HyNs=
 github.com/BurntSushi/toml v1.4.1-0.20240526193622-a339e1f7089c/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/DataDog/zstd v1.5.5 h1:oWf5W7GtOLgp6bciQYDmhHHjdhYkALu6S/5Ni9ZgSvQ=
-github.com/DataDog/zstd v1.5.5/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
+github.com/DataDog/zstd v1.5.7 h1:ybO8RBeh29qrxIhCA9E8gKY6xfONU9T6G6aP9DTKfLE=
+github.com/DataDog/zstd v1.5.7/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
-github.com/MariusVanDerWijden/FuzzyVM v0.0.0-20240516070431-7828990cad7d h1:RQtzNvriR3Yu5CvVBTJPwDmfItBT90TWZ3fFondhc08=
-github.com/MariusVanDerWijden/FuzzyVM v0.0.0-20240516070431-7828990cad7d/go.mod h1:gWTykV/ZinShgltWofTEJY4TsletuvGhB6l4+Ai2F+E=
-github.com/MariusVanDerWijden/tx-fuzz v1.4.0 h1:Tq4lXivsR8mtoP4RpasUDIUpDLHfN1YhFge/kzrzK78=
-github.com/MariusVanDerWijden/tx-fuzz v1.4.0/go.mod h1:gmOVECg7o5FY5VU3DQ/fY0zTk/ExBdMkUGz0vA8qqms=
 github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
 github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/OffchainLabs/go-bitfield v0.0.0-20251031151322-f427d04d8506 h1:d/SJkN8/9Ca+1YmuDiUJxAiV4w/a9S8NcsG7GMQSrVI=
 github.com/OffchainLabs/go-bitfield v0.0.0-20251031151322-f427d04d8506/go.mod h1:6TZI4FU6zT8x6ZfWa1J8YQ2NgW0wLV/W3fHRca8ISBo=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251001021608-1fe7b43fc4d6 h1:1zYrtlhrZ6/b6SAjLSfKzWtdgqK0U+HtH/VcBWh1BaU=
+github.com/ProjectZKM/Ziren/crates/go-runtime/zkvm_runtime v0.0.0-20251001021608-1fe7b43fc4d6/go.mod h1:ioLG6R+5bUSO1oeGSDxOV3FADARuMoytZCSX6MEMQkI=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/sarama v1.26.1/go.mod h1:NbSGBSSndYaIhRcBtY9V0U7AyH+x71bG668AuWys/yU=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/VictoriaMetrics/fastcache v1.12.2 h1:N0y9ASrJ0F6h0QaC3o6uJb3NIZ9VKLjCM7NQbSmF7WI=
-github.com/VictoriaMetrics/fastcache v1.12.2/go.mod h1:AmC+Nzz1+3G2eCPapF6UcsnkThDcMsQicp4xDukwJYI=
+github.com/VictoriaMetrics/fastcache v1.13.0 h1:AW4mheMR5Vd9FkAPUv+NH6Nhw+fmbTMGMsNAoA/+4G0=
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@@ -71,9 +69,8 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
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@@ -100,8 +97,8 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
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@@ -115,7 +112,6 @@ github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA
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@@ -145,17 +141,15 @@ github.com/cockroachdb/fifo v0.0.0-20240606204812-0bbfbd93a7ce h1:giXvy4KSc/6g/e
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@@ -170,8 +164,10 @@ github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSV
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@@ -186,12 +182,14 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
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@@ -223,8 +221,8 @@ github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaB
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@@ -234,12 +232,12 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
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@@ -248,8 +246,8 @@ github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4Nij
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@@ -325,8 +323,8 @@ github.com/godbus/dbus/v5 v5.0.3/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5x
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@@ -373,8 +371,8 @@ github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8l
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@@ -418,7 +416,6 @@ github.com/google/pprof v0.0.0-20230207041349-798e818bf904/go.mod h1:uglQLonpP8q
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@@ -486,12 +483,10 @@ github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/J
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@@ -549,8 +544,8 @@ github.com/kisielk/errcheck v1.8.0/go.mod h1:1kLL+jV4e+CFfueBmI1dSK2ADDyQnlrnrY/
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@@ -646,8 +641,8 @@ github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D
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@@ -681,13 +676,11 @@ github.com/mitchellh/mapstructure v0.0.0-20160808181253-ca63d7c062ee/go.mod h1:F
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@@ -995,8 +988,8 @@ github.com/spf13/cobra v0.0.3/go.mod h1:1l0Ry5zgKvJasoi3XT1TypsSe7PqH0Sj9dhYf7v3
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@@ -1033,20 +1026,18 @@ github.com/tenntenn/text/transform v0.0.0-20200319021203-7eef512accb3/go.mod h1:
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@@ -1081,8 +1072,8 @@ github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
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+github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
+github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
 go.etcd.io/bbolt v1.3.6 h1:/ecaJf0sk1l4l6V4awd65v2C3ILy7MSj+s/x1ADCIMU=
@@ -1184,8 +1175,8 @@ golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
 golang.org/x/exp v0.0.0-20200331195152-e8c3332aa8e5/go.mod h1:4M0jN8W1tt0AVLNr8HDosyJCDCDuyL9N9+3m7wDWgKw=
-golang.org/x/exp v0.0.0-20250128182459-e0ece0dbea4c h1:KL/ZBHXgKGVmuZBZ01Lt57yE5ws8ZPSkkihmEyq7FXc=
-golang.org/x/exp v0.0.0-20250128182459-e0ece0dbea4c/go.mod h1:tujkw807nyEEAamNbDrEGzRav+ilXA7PCRAd6xsmwiU=
+golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6 h1:y5zboxd6LQAqYIhHnB48p0ByQ/GnQx2BE33L8BOHQkI=
+golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6/go.mod h1:U6Lno4MTRCDY+Ba7aCcauB9T60gsv5s4ralQzP72ZoQ=
 golang.org/x/exp/typeparams v0.0.0-20231108232855-2478ac86f678 h1:1P7xPZEwZMoBoz0Yze5Nx2/4pxj6nw9ZqHWXqP0iRgQ=
 golang.org/x/exp/typeparams v0.0.0-20231108232855-2478ac86f678/go.mod h1:AbB0pIl9nAr9wVwH+Z2ZpaocVmF5I4GyWCDIsVjR0bk=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
@@ -1391,7 +1382,6 @@ golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.9.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
 golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
@@ -1693,8 +1683,6 @@ lukechampine.com/blake3 v1.3.0/go.mod h1:0OFRp7fBtAylGVCO40o87sbupkyIGgbpv1+M1k1
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
-rsc.io/tmplfunc v0.0.3 h1:53XFQh69AfOa8Tw0Jm7t+GV7KZhOi6jzsCzTtKbMvzU=
-rsc.io/tmplfunc v0.0.3/go.mod h1:AG3sTPzElb1Io3Yg4voV9AGZJuleGAwaVRxL9M49PhA=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
 sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
 sigs.k8s.io/structured-merge-diff/v4 v4.4.1 h1:150L+0vs/8DA78h1u02ooW1/fFq/Lwr+sGiqlzvrtq4=

network/httputil/writer.go

@@ -43,6 +43,7 @@ func WriteJson(w http.ResponseWriter, v any) {
 func WriteSsz(w http.ResponseWriter, respSsz []byte) {
 	w.Header().Set("Content-Length", strconv.Itoa(len(respSsz)))
 	w.Header().Set("Content-Type", api.OctetStreamMediaType)
+	w.WriteHeader(http.StatusOK)
 	if _, err := io.Copy(w, io.NopCloser(bytes.NewReader(respSsz))); err != nil {
 		log.WithError(err).Error("Could not write response message")
 	}

runtime/interop/genesis.go

@@ -99,7 +99,7 @@ func GethCancunTime(genesisTime time.Time, cfg *clparams.BeaconChainConfig) *uin
 }
 
 // GethPragueTime calculates the absolute time of the prague (aka electra) fork block
-// by adding the relative time of the capella the fork epoch to the given genesis timestamp.
+// by adding the relative time of the electra fork epoch to the given genesis timestamp.
 func GethPragueTime(genesisTime time.Time, cfg *clparams.BeaconChainConfig) *uint64 {
 	var pragueTime *uint64
 	if cfg.ElectraForkEpoch != math.MaxUint64 {
@@ -128,6 +128,45 @@ func GethOsakaTime(genesisTime time.Time, cfg *clparams.BeaconChainConfig) *uint
 	return osakaTime
 }
 
+// GethBPO1Time calculates the absolute time of the BPO1 activation
+// by finding the first BlobSchedule entry with MaxBlobsPerBlock > 9 (Electra's limit)
+// which corresponds to the first BPO increase.
+func GethBPO1Time(genesisTime time.Time, cfg *clparams.BeaconChainConfig) *uint64 {
+	for _, entry := range cfg.BlobSchedule {
+		// BPO1 is the first entry that increases beyond Electra's 9 blobs
+		if entry.MaxBlobsPerBlock > uint64(cfg.DeprecatedMaxBlobsPerBlockElectra) {
+			startSlot, err := slots.EpochStart(entry.Epoch)
+			if err == nil {
+				startTime := slots.UnsafeStartTime(genesisTime, startSlot)
+				newTime := uint64(startTime.Unix())
+				return &newTime
+			}
+		}
+	}
+	return nil
+}
+
+// GethBPO2Time calculates the absolute time of the BPO2 activation
+// by finding the second BlobSchedule entry with MaxBlobsPerBlock > 9.
+func GethBPO2Time(genesisTime time.Time, cfg *clparams.BeaconChainConfig) *uint64 {
+	count := 0
+	for _, entry := range cfg.BlobSchedule {
+		// Count entries that are beyond Electra's limit
+		if entry.MaxBlobsPerBlock > uint64(cfg.DeprecatedMaxBlobsPerBlockElectra) {
+			count++
+			if count == 2 { // BPO2 is the second such entry
+				startSlot, err := slots.EpochStart(entry.Epoch)
+				if err == nil {
+					startTime := slots.UnsafeStartTime(genesisTime, startSlot)
+					newTime := uint64(startTime.Unix())
+					return &newTime
+				}
+			}
+		}
+	}
+	return nil
+}
+
 // GethTestnetGenesis creates a genesis.json for eth1 clients with a set of defaults suitable for ephemeral testnets,
 // like in an e2e test. The parameters are minimal but the full value is returned unmarshaled so that it can be
 // customized as desired.
@@ -149,6 +188,8 @@ func GethTestnetGenesis(genesis time.Time, cfg *clparams.BeaconChainConfig) *cor
 	if cfg.FuluForkEpoch == 0 {
 		osakaTime = &genesisTime
 	}
+	bpo1Time := GethBPO1Time(genesis, cfg)
+	bpo2Time := GethBPO2Time(genesis, cfg)
 	cc := &params.ChainConfig{
 		ChainID:                 big.NewInt(defaultTestChainId),
 		HomesteadBlock:          bigz,
@@ -171,18 +212,16 @@ func GethTestnetGenesis(genesis time.Time, cfg *clparams.BeaconChainConfig) *cor
 		CancunTime:              cancunTime,
 		PragueTime:              pragueTime,
 		OsakaTime:               osakaTime,
+		BPO1Time:                bpo1Time,
+		BPO2Time:                bpo2Time,
 		DepositContractAddress:  common.HexToAddress(cfg.DepositContractAddress),
 		BlobScheduleConfig: &params.BlobScheduleConfig{
-			Cancun: &params.BlobConfig{
-				Target:         3,
-				Max:            6,
-				UpdateFraction: 3338477,
-			},
-			Prague: &params.BlobConfig{
-				Target:         6,
-				Max:            9,
-				UpdateFraction: 5007716,
-			},
+			Cancun: params.DefaultCancunBlobConfig,
+			Prague: params.DefaultPragueBlobConfig,
+			Osaka:  params.DefaultOsakaBlobConfig,
+			BPO1:   params.DefaultBPO1BlobConfig,
+			BPO2:   params.DefaultBPO2BlobConfig,
+			BPO3:   params.DefaultBPO3BlobConfig,
 		},
 	}
 	da := defaultDepositContractAllocation(cfg.DepositContractAddress)

testing/endtoend/BUILD.bazel

@@ -5,6 +5,7 @@ load("@prysm//tools/go:def.bzl", "go_test")
 # gazelle:exclude mainnet_scenario_e2e_test.go
 # gazelle:exclude minimal_scenario_e2e_test.go
 # gazelle:exclude minimal_builder_e2e_test.go
+# gazelle:exclude minimal_postmerge_e2e_test.go
 
 # Presubmit tests represent the group of endtoend tests that are run on pull
 # requests and must be passing before a pull request can merge.
@@ -27,6 +28,7 @@ test_suite(
     ],
     tests = [
         ":go_builder_test",
+        ":go_minimal_postmerge_test",
         ":go_mainnet_test",
     ],
 )
@@ -88,7 +90,7 @@ common_deps = [
 # gazelle:ignore
 go_test(
     name = "go_default_test",
-    size = "large",
+    size = "enormous",
     testonly = True,
     srcs = [
         "component_handler_test.go",
@@ -153,6 +155,39 @@ go_test(
     deps = common_deps,
 )
 
+# Full e2e test from post-merge (Bellatrix) through all forks (post-submit only, takes longer)
+go_test(
+    name = "go_minimal_postmerge_test",
+    size = "enormous",
+    testonly = True,
+    srcs = [
+        "component_handler_test.go",
+        "endtoend_setup_test.go",
+        "endtoend_test.go",
+        "minimal_postmerge_e2e_test.go",
+    ],
+    args = ["-test.v"],
+    data = [
+        "//:prysm_sh",
+        "//cmd/beacon-chain",
+        "//cmd/validator",
+        "//config/params:custom_configs",
+        "//tools/bootnode",
+        "@com_github_ethereum_go_ethereum//cmd/geth",
+        "@web3signer",
+    ],
+    eth_network = "minimal",
+    flaky = True,
+    shard_count = 2,
+    tags = [
+        "e2e",
+        "manual",
+        "minimal",
+        "requires-network",
+    ],
+    deps = common_deps,
+)
+
 go_test(
     name = "go_mainnet_test",
     size = "large",

testing/endtoend/components/eth1/BUILD.bazel

@@ -28,6 +28,7 @@ go_library(
         "//testing/endtoend/types:go_default_library",
         "//testing/middleware/engine-api-proxy:go_default_library",
         "//testing/util:go_default_library",
+        "//time/slots:go_default_library",
         "@com_github_ethereum_go_ethereum//:go_default_library",
         "@com_github_ethereum_go_ethereum//accounts/abi/bind:go_default_library",
         "@com_github_ethereum_go_ethereum//accounts/keystore:go_default_library",
@@ -38,8 +39,6 @@ go_library(
         "@com_github_ethereum_go_ethereum//ethclient/gethclient:go_default_library",
         "@com_github_ethereum_go_ethereum//rpc:go_default_library",
         "@com_github_holiman_uint256//:go_default_library",
-        "@com_github_mariusvanderwijden_fuzzyvm//filler:go_default_library",
-        "@com_github_mariusvanderwijden_tx_fuzz//:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
         "@io_bazel_rules_go//go/tools/bazel:go_default_library",

testing/endtoend/components/eth1/depositor.go

@@ -267,6 +267,10 @@ func (d *Depositor) txops(ctx context.Context) (*bind.TransactOpts, error) {
 		return nil, err
 	}
 	txo.Nonce = big.NewInt(0).SetUint64(nonce)
+	// Set a high gas price to ensure deposit transactions can replace any pending
+	// transactions from the transaction generator that may be using the same nonce.
+	// The transaction generator uses 1e11 (100 Gwei), so we use 2e11 (200 Gwei).
+	txo.GasPrice = big.NewInt(2e11)
 	return txo, nil
 }
 

testing/endtoend/components/eth1/helpers.go

@@ -3,6 +3,7 @@ package eth1
 import (
 	"context"
 	"math/big"
+	"strings"
 	"time"
 
 	"github.com/OffchainLabs/prysm/v7/testing/endtoend/params"
@@ -31,10 +32,6 @@ var _ e2etypes.EngineProxy = (*Proxy)(nil)
 
 // WaitForBlocks waits for a certain amount of blocks to be mined by the ETH1 chain before returning.
 func WaitForBlocks(ctx context.Context, web3 *ethclient.Client, key *keystore.Key, blocksToWait uint64) error {
-	nonce, err := web3.PendingNonceAt(ctx, key.Address)
-	if err != nil {
-		return err
-	}
 	chainID, err := web3.NetworkID(ctx)
 	if err != nil {
 		return err
@@ -49,19 +46,36 @@ func WaitForBlocks(ctx context.Context, web3 *ethclient.Client, key *keystore.Ke
 		if ctx.Err() != nil {
 			return ctx.Err()
 		}
+		// Get fresh nonce each iteration to handle any pending transactions
+		nonce, err := web3.PendingNonceAt(ctx, key.Address)
+		if err != nil {
+			return err
+		}
 		gasPrice, err := web3.SuggestGasPrice(ctx)
 		if err != nil {
 			return err
 		}
+		// Bump gas price by 20% to ensure we can replace any pending transactions
+		gasPrice = new(big.Int).Mul(gasPrice, big.NewInt(120))
+		gasPrice = new(big.Int).Div(gasPrice, big.NewInt(100))
+
 		spamTX := types.NewTransaction(nonce, key.Address, big.NewInt(0), params.SpamTxGasLimit, gasPrice, []byte{})
 		signed, err := types.SignTx(spamTX, types.NewEIP155Signer(chainID), key.PrivateKey)
 		if err != nil {
 			return err
 		}
 		if err = web3.SendTransaction(ctx, signed); err != nil {
+			// If replacement error, try again with next iteration which will get fresh nonce
+			if strings.Contains(err.Error(), "replacement transaction underpriced") {
+				time.Sleep(timeGapPerMiningTX)
+				block, err = web3.BlockByNumber(ctx, nil)
+				if err != nil {
+					return err
+				}
+				continue
+			}
 			return err
 		}
-		nonce++
 		time.Sleep(timeGapPerMiningTX)
 		block, err = web3.BlockByNumber(ctx, nil)
 		if err != nil {

testing/endtoend/components/eth1/transactions.go

@@ -10,12 +10,11 @@ import (
 	"os"
 	"time"
 
-	"github.com/MariusVanDerWijden/FuzzyVM/filler"
-	txfuzz "github.com/MariusVanDerWijden/tx-fuzz"
 	fieldparams "github.com/OffchainLabs/prysm/v7/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v7/config/params"
 	"github.com/OffchainLabs/prysm/v7/crypto/rand"
 	e2e "github.com/OffchainLabs/prysm/v7/testing/endtoend/params"
+	"github.com/OffchainLabs/prysm/v7/time/slots"
 	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/common"
@@ -35,11 +34,12 @@ const txCount = 20
 var fundedAccount *keystore.Key
 
 type TransactionGenerator struct {
-	keystore string
-	seed     int64
-	started  chan struct{}
-	cancel   context.CancelFunc
-	paused   bool
+	keystore      string
+	seed          int64
+	started       chan struct{}
+	cancel        context.CancelFunc
+	paused        bool
+	useLargeBlobs bool // Use large blob transactions (6 blobs per tx) for BPO testing
 }
 
 func (t *TransactionGenerator) UnderlyingProcess() *os.Process {
@@ -48,8 +48,8 @@ func (t *TransactionGenerator) UnderlyingProcess() *os.Process {
 	return &os.Process{}
 }
 
-func NewTransactionGenerator(keystore string, seed int64) *TransactionGenerator {
-	return &TransactionGenerator{keystore: keystore, seed: seed}
+func NewTransactionGenerator(keystore string, seed int64, useLargeBlobs bool) *TransactionGenerator {
+	return &TransactionGenerator{keystore: keystore, seed: seed, useLargeBlobs: useLargeBlobs}
 }
 
 func (t *TransactionGenerator) Start(ctx context.Context) error {
@@ -67,7 +67,7 @@ func (t *TransactionGenerator) Start(ctx context.Context) error {
 	newGen := rand.NewDeterministicGenerator()
 	if seed == 0 {
 		seed = newGen.Int63()
-		logrus.Infof("Seed for transaction generator is: %d", seed)
+		logrus.WithField("Seed", seed).Info("Transaction generator")
 	}
 	// Set seed so that all transactions can be
 	// deterministically generated.
@@ -86,12 +86,21 @@ func (t *TransactionGenerator) Start(ctx context.Context) error {
 		return err
 	}
 	fundedAccount = newKey
-	rnd := make([]byte, 10000)
-	_, err = mathRand.Read(rnd) // #nosec G404
-	if err != nil {
+	// Ensure funding tx is mined before generating txs that rely on balance.
+	// Mine 1 block using the miner key to include the funding transfer.
+	backend := ethclient.NewClient(client)
+	defer backend.Close()
+
+	if err := WaitForBlocks(ctx, backend, mineKey, 1); err != nil {
+		return errors.Wrap(err, "failed to mine block for funding tx")
+	}
+
+	// Ensure the funded account has a comfortable minimum balance for blob and fuzzed txs.
+	minWei := new(big.Int).Mul(big.NewInt(1000), big.NewInt(0).SetUint64(params.BeaconConfig().GweiPerEth))
+	minWei.Mul(minWei, big.NewInt(1e9)) // 1000 ETH in wei
+	if err := ensureMinBalance(ctx, client, backend, mineKey, fundedAccount, minWei); err != nil {
 		return err
 	}
-	f := filler.NewFiller(rnd)
 	// Broadcast Transactions every slot
 	txPeriod := time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second
 	ticker := time.NewTicker(txPeriod)
@@ -105,7 +114,7 @@ func (t *TransactionGenerator) Start(ctx context.Context) error {
 				continue
 			}
 			backend := ethclient.NewClient(client)
-			err = SendTransaction(client, mineKey.PrivateKey, f, gasPrice, mineKey.Address.String(), txCount, backend, false)
+			err = SendTransaction(client, mineKey.PrivateKey, gasPrice, mineKey.Address.String(), txCount, backend, false, t.useLargeBlobs)
 			if err != nil {
 				return err
 			}
@@ -119,7 +128,7 @@ func (s *TransactionGenerator) Started() <-chan struct{} {
 	return s.started
 }
 
-func SendTransaction(client *rpc.Client, key *ecdsa.PrivateKey, f *filler.Filler, gasPrice *big.Int, addr string, N uint64, backend *ethclient.Client, al bool) error {
+func SendTransaction(client *rpc.Client, key *ecdsa.PrivateKey, gasPrice *big.Int, addr string, txCount uint64, backend *ethclient.Client, al bool, useLargeBlobs bool) error {
 	sender := common.HexToAddress(addr)
 	nonce, err := backend.PendingNonceAt(context.Background(), fundedAccount.Address)
 	if err != nil {
@@ -136,30 +145,65 @@ func SendTransaction(client *rpc.Client, key *ecdsa.PrivateKey, f *filler.Filler
 	if expectedPrice.Cmp(gasPrice) > 0 {
 		gasPrice = expectedPrice
 	}
+
+	// Check if we're post-Fulu fork
+	currentSlot := slots.CurrentSlot(e2e.TestParams.CLGenesisTime)
+	currentEpoch := slots.ToEpoch(currentSlot)
+	fuluForkEpoch := params.BeaconConfig().FuluForkEpoch
+	isPostFulu := currentEpoch >= fuluForkEpoch
+
 	g, _ := errgroup.WithContext(context.Background())
 	txs := make([]*types.Transaction, 10)
-	for i := range uint64(10) {
-		index := i
-		g.Go(func() error {
-			tx, err := RandomBlobTx(client, f, fundedAccount.Address, nonce+index, gasPrice, chainid, al)
-			if err != nil {
-				logrus.WithError(err).Error("Could not create blob tx")
-				// In the event the transaction constructed is not valid, we continue with the routine
-				// rather than complete stop it.
-				//nolint:nilerr
+
+	// Send blob transactions - use different versions pre/post Fulu
+	if isPostFulu {
+		logrus.Info("Sending blob transactions with cell proofs")
+		// Reduced from 10 to 5 to reduce load and prevent builder/EL timeouts
+		for index := range uint64(5) {
+
+			g.Go(func() error {
+				tx, err := RandomBlobCellTx(client, fundedAccount.Address, nonce+index, gasPrice, chainid, al, useLargeBlobs)
+				if err != nil {
+					return errors.Wrap(err, "Could not create blob cell tx")
+				}
+
+				signedTx, err := types.SignTx(tx, types.NewCancunSigner(chainid), fundedAccount.PrivateKey)
+				if err != nil {
+					return errors.Wrap(err, "Could not sign blob cell tx")
+				}
+
+				txs[index] = signedTx
 				return nil
-			}
-			signedTx, err := types.SignTx(tx, types.NewCancunSigner(chainid), fundedAccount.PrivateKey)
-			if err != nil {
-				logrus.WithError(err).Error("Could not sign blob tx")
-				// We continue on in the event there is a reason we can't sign this
-				// transaction(unlikely).
-				//nolint:nilerr
+			})
+		}
+	} else {
+		logrus.Info("Sending blob transactions with sidecars")
+		// Reduced from 10 to 5 to reduce load and prevent builder/EL timeouts
+		for index := range uint64(5) {
+
+			g.Go(func() error {
+				tx, err := RandomBlobTx(client, fundedAccount.Address, nonce+index, gasPrice, chainid, al, useLargeBlobs)
+				if err != nil {
+					logrus.WithError(err).Error("Could not create blob tx")
+					// In the event the transaction constructed is not valid, we continue with the routine
+					// rather than complete stop it.
+					//nolint:nilerr
+					return nil
+				}
+
+				signedTx, err := types.SignTx(tx, types.NewCancunSigner(chainid), fundedAccount.PrivateKey)
+				if err != nil {
+					logrus.WithError(err).Error("Could not sign blob tx")
+					// We continue on in the event there is a reason we can't sign this
+					// transaction(unlikely).
+					//nolint:nilerr
+					return nil
+				}
+
+				txs[index] = signedTx
 				return nil
-			}
-			txs[index] = signedTx
-			return nil
-		})
+			})
+		}
 	}
 
 	if err := g.Wait(); err != nil {
@@ -169,6 +213,7 @@ func SendTransaction(client *rpc.Client, key *ecdsa.PrivateKey, f *filler.Filler
 		if tx == nil {
 			continue
 		}
+
 		err = backend.SendTransaction(context.Background(), tx)
 		if err != nil {
 			// Do nothing
@@ -181,17 +226,20 @@ func SendTransaction(client *rpc.Client, key *ecdsa.PrivateKey, f *filler.Filler
 		return err
 	}
 
-	txs = make([]*types.Transaction, N)
-	for i := range N {
-		index := i
+	txs = make([]*types.Transaction, txCount)
+	for index := range txCount {
+
 		g.Go(func() error {
-			tx, err := txfuzz.RandomValidTx(client, f, sender, nonce+index, gasPrice, chainid, al)
+			tx, err := randomValidTx(sender, nonce+index, gasPrice, chainid, al)
 			if err != nil {
 				// In the event the transaction constructed is not valid, we continue with the routine
 				// rather than complete stop it.
 				//nolint:nilerr
 				return nil
 			}
+			// Clamp gas to avoid exceeding common EL per-tx gas caps (e.g. 16,777,216) due to EIP-7825: Transaction Gas Limit Cap
+			tx = clampTxGas(tx, 16_000_000)
+
 			signedTx, err := types.SignTx(tx, types.NewLondonSigner(chainid), key)
 			if err != nil {
 				// We continue on in the event there is a reason we can't sign this
@@ -237,11 +285,13 @@ func (t *TransactionGenerator) Stop() error {
 	return nil
 }
 
-func RandomBlobTx(rpc *rpc.Client, f *filler.Filler, sender common.Address, nonce uint64, gasPrice, chainID *big.Int, al bool) (*types.Transaction, error) {
+func RandomBlobCellTx(rpc *rpc.Client, sender common.Address, nonce uint64, gasPrice, chainID *big.Int, al bool, useLargeBlobs bool) (*types.Transaction, error) {
 	// Set fields if non-nil
 	if rpc != nil {
 		client := ethclient.NewClient(rpc)
+
 		var err error
+
 		if gasPrice == nil {
 			gasPrice, err = client.SuggestGasPrice(context.Background())
 			if err != nil {
@@ -255,27 +305,133 @@ func RandomBlobTx(rpc *rpc.Client, f *filler.Filler, sender common.Address, nonc
 			}
 		}
 	}
+
 	gas := uint64(100000)
 	to := randomAddress()
-	code := txfuzz.RandomCode(f)
+	// Generate random EVM bytecode (similar to what tx-fuzz RandomCode did)
+	code := generateRandomEVMCode(mathRand.Intn(128)) // #nosec G404
 	value := big.NewInt(0)
-	if len(code) > 128 {
-		code = code[:128]
-	}
+
 	mod := 2
 	if al {
 		mod = 1
 	}
-	switch f.Byte() % byte(mod) {
+
+	// Helper to get blob data based on config
+	getBlobData := func() ([]byte, error) {
+		if useLargeBlobs {
+			return randomBlobDataLarge()
+		}
+		return randomBlobData()
+	}
+
+	// #nosec G404 -- Test code uses deterministic randomness
+	switch mathRand.Intn(mod) {
 	case 0:
-		// 4844 transaction without AL
+		// Blob transaction with cell proofs (Version 1 sidecar)
 		tip, feecap, err := getCaps(rpc, gasPrice)
 		if err != nil {
 			return nil, errors.Wrap(err, "getCaps")
 		}
-		data, err := randomBlobData()
+
+		data, err := getBlobData()
 		if err != nil {
-			return nil, errors.Wrap(err, "randomBlobData")
+			return nil, errors.Wrap(err, "getBlobData")
+		}
+
+		return New4844CellTx(nonce, &to, gas, chainID, tip, feecap, value, code, big.NewInt(1000000), data, make(types.AccessList, 0))
+	case 1:
+		// Blob transaction with cell proofs and access list
+		tx := types.NewTx(&types.LegacyTx{
+			Nonce:    nonce,
+			To:       &to,
+			Value:    value,
+			Gas:      gas,
+			GasPrice: gasPrice,
+			Data:     code,
+		})
+
+		// Use legacy GasPrice for access list simulation to satisfy post-London requirement.
+		msg := ethereum.CallMsg{
+			From:       sender,
+			To:         tx.To(),
+			Gas:        tx.Gas(),
+			GasPrice:   gasPrice,
+			Value:      tx.Value(),
+			Data:       tx.Data(),
+			AccessList: nil,
+		}
+		geth := gethclient.New(rpc)
+
+		al, _, _, err := geth.CreateAccessList(context.Background(), msg)
+		if err != nil {
+			return nil, errors.Wrap(err, "CreateAccessList")
+		}
+		tip, feecap, err := getCaps(rpc, gasPrice)
+		if err != nil {
+			return nil, errors.Wrap(err, "getCaps")
+		}
+		data, err := getBlobData()
+		if err != nil {
+			return nil, errors.Wrap(err, "getBlobData")
+		}
+
+		return New4844CellTx(nonce, &to, gas, chainID, tip, feecap, value, code, big.NewInt(1000000), data, *al)
+	}
+
+	return nil, nil
+}
+
+func RandomBlobTx(rpc *rpc.Client, sender common.Address, nonce uint64, gasPrice, chainID *big.Int, al bool, useLargeBlobs bool) (*types.Transaction, error) {
+	// Set fields if non-nil
+	if rpc != nil {
+		client := ethclient.NewClient(rpc)
+		var err error
+		if gasPrice == nil {
+			gasPrice, err = client.SuggestGasPrice(context.Background())
+			if err != nil {
+				gasPrice = big.NewInt(1)
+			}
+		}
+
+		if chainID == nil {
+			chainID, err = client.ChainID(context.Background())
+			if err != nil {
+				chainID = big.NewInt(1)
+			}
+		}
+	}
+	gas := uint64(100000)
+	to := randomAddress()
+	// Generate random EVM bytecode (similar to what tx-fuzz RandomCode did)
+	code := generateRandomEVMCode(mathRand.Intn(128)) // #nosec G404
+	value := big.NewInt(0)
+	mod := 2
+	if al {
+		mod = 1
+	}
+
+	// Helper to get blob data based on config
+	getBlobData := func() ([]byte, error) {
+		if useLargeBlobs {
+			return randomBlobDataLarge()
+		}
+		return randomBlobData()
+	}
+
+	// #nosec G404 -- Test code uses deterministic randomness
+	switch mathRand.Intn(mod) {
+	case 0:
+		// 4844 transaction without AL
+
+		tip, feecap, err := getCaps(rpc, gasPrice)
+		if err != nil {
+			return nil, errors.Wrap(err, "getCaps")
+		}
+
+		data, err := getBlobData()
+		if err != nil {
+			return nil, errors.Wrap(err, "getBlobData")
 		}
 		return New4844Tx(nonce, &to, gas, chainID, tip, feecap, value, code, big.NewInt(1000000), data, make(types.AccessList, 0)), nil
 	case 1:
@@ -289,18 +445,18 @@ func RandomBlobTx(rpc *rpc.Client, f *filler.Filler, sender common.Address, nonc
 			Data:     code,
 		})
 
-		// TODO: replace call with al, err := txfuzz.CreateAccessList(rpc, tx, sender) when txfuzz is fixed in new release
-		// an error occurs mentioning error="CreateAccessList: both gasPrice and (maxFeePerGas or maxPriorityFeePerGas) specified"
+		// Use legacy GasPrice for access list simulation to satisfy post-London requirement.
 		msg := ethereum.CallMsg{
 			From:       sender,
 			To:         tx.To(),
 			Gas:        tx.Gas(),
-			GasPrice:   tx.GasPrice(),
+			GasPrice:   gasPrice,
 			Value:      tx.Value(),
 			Data:       tx.Data(),
 			AccessList: nil,
 		}
 		geth := gethclient.New(rpc)
+
 		al, _, _, err := geth.CreateAccessList(context.Background(), msg)
 		if err != nil {
 			return nil, errors.Wrap(err, "CreateAccessList")
@@ -309,15 +465,52 @@ func RandomBlobTx(rpc *rpc.Client, f *filler.Filler, sender common.Address, nonc
 		if err != nil {
 			return nil, errors.Wrap(err, "getCaps")
 		}
-		data, err := randomBlobData()
+		data, err := getBlobData()
 		if err != nil {
-			return nil, errors.Wrap(err, "randomBlobData")
+			return nil, errors.Wrap(err, "getBlobData")
 		}
 		return New4844Tx(nonce, &to, gas, chainID, tip, feecap, value, code, big.NewInt(1000000), data, *al), nil
 	}
 	return nil, errors.New("asdf")
 }
 
+func New4844CellTx(nonce uint64, to *common.Address, gasLimit uint64, chainID, tip, feeCap, value *big.Int, code []byte, blobFeeCap *big.Int, blobData []byte, al types.AccessList) (*types.Transaction, error) {
+	blobs, comms, _, versionedHashes, err := EncodeBlobs(blobData)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to encode blobs")
+	}
+
+	// Create a Version 0 sidecar first
+	sidecar := &types.BlobTxSidecar{
+		Version:     types.BlobSidecarVersion0,
+		Blobs:       blobs,
+		Commitments: comms,
+		Proofs:      make([]kzg4844.Proof, len(blobs)), // Placeholder, will be replaced by ToV1
+	}
+
+	// Convert to Version 1 which will compute and attach cell proofs
+	if err := sidecar.ToV1(); err != nil {
+		return nil, errors.Wrap(err, "failed to convert sidecar to V1")
+	}
+
+	tx := types.NewTx(&types.BlobTx{
+		ChainID:    uint256.MustFromBig(chainID),
+		Nonce:      nonce,
+		GasTipCap:  uint256.MustFromBig(tip),
+		GasFeeCap:  uint256.MustFromBig(feeCap),
+		Gas:        gasLimit,
+		To:         *to,
+		Value:      uint256.MustFromBig(value),
+		Data:       code,
+		AccessList: al,
+		BlobFeeCap: uint256.MustFromBig(blobFeeCap),
+		BlobHashes: versionedHashes,
+		Sidecar:    sidecar,
+	})
+
+	return tx, nil
+}
+
 func New4844Tx(nonce uint64, to *common.Address, gasLimit uint64, chainID, tip, feeCap, value *big.Int, code []byte, blobFeeCap *big.Int, blobData []byte, al types.AccessList) *types.Transaction {
 	blobs, comms, proofs, versionedHashes, err := EncodeBlobs(blobData)
 	if err != nil {
@@ -344,15 +537,91 @@ func New4844Tx(nonce uint64, to *common.Address, gasLimit uint64, chainID, tip,
 	return tx
 }
 
+// clampTxGas returns a copy of tx with Gas reduced to cap if it exceeds cap.
+// This avoids EL errors like "transaction gas limit too high" on networks with
+// per-transaction gas caps (commonly ~16,777,216).
+func clampTxGas(tx *types.Transaction, gasCap uint64) *types.Transaction {
+	if tx == nil || tx.Gas() <= gasCap {
+		return tx
+	}
+
+	to := tx.To()
+	switch tx.Type() {
+	case types.LegacyTxType:
+		return types.NewTx(&types.LegacyTx{
+			Nonce:    tx.Nonce(),
+			To:       to,
+			Value:    tx.Value(),
+			Gas:      gasCap,
+			GasPrice: tx.GasPrice(),
+			Data:     tx.Data(),
+		})
+	case types.AccessListTxType:
+		return types.NewTx(&types.AccessListTx{
+			ChainID:    tx.ChainId(),
+			Nonce:      tx.Nonce(),
+			To:         to,
+			Value:      tx.Value(),
+			Gas:        gasCap,
+			GasPrice:   tx.GasPrice(),
+			Data:       tx.Data(),
+			AccessList: tx.AccessList(),
+		})
+	case types.DynamicFeeTxType:
+		return types.NewTx(&types.DynamicFeeTx{
+			ChainID:    tx.ChainId(),
+			Nonce:      tx.Nonce(),
+			To:         to,
+			Value:      tx.Value(),
+			Gas:        gasCap,
+			Data:       tx.Data(),
+			AccessList: tx.AccessList(),
+			GasTipCap:  tx.GasTipCap(),
+			GasFeeCap:  tx.GasFeeCap(),
+		})
+	case types.BlobTxType:
+		// Leave blob txs unchanged here; blob tx construction paths set gas explicitly.
+		return tx
+	default:
+		return tx
+	}
+}
+
+// ensureMinBalance tops up dest account from miner if its balance is below minWei.
+func ensureMinBalance(ctx context.Context, rpcCli *rpc.Client, backend *ethclient.Client, minerKey, destKey *keystore.Key, minWei *big.Int) error {
+	bal, err := backend.BalanceAt(ctx, destKey.Address, nil)
+	if err != nil {
+		return err
+	}
+
+	if bal.Cmp(minWei) >= 0 {
+		return nil
+	}
+
+	if err := fundAccount(rpcCli, minerKey, destKey); err != nil {
+		return err
+	}
+
+	if err := WaitForBlocks(ctx, backend, minerKey, 1); err != nil {
+		return errors.Wrap(err, "failed to mine block for top-up tx")
+	}
+
+	return nil
+}
+
 func encodeBlobs(data []byte) []kzg4844.Blob {
 	blobs := []kzg4844.Blob{{}}
 	blobIndex := 0
 	fieldIndex := -1
 	numOfElems := fieldparams.BlobLength / 32
+	// Allow up to 6 blobs per transaction to properly test BPO limits.
+	// With 10 blob txs per slot × 6 blobs = 60 max blobs submitted,
+	// which exceeds the highest BPO limit (21) and ensures we can hit it.
+	const maxBlobsPerTx = 6
 	for i := 0; i < len(data); i += 31 {
 		fieldIndex++
 		if fieldIndex == numOfElems {
-			if blobIndex >= 1 {
+			if blobIndex >= maxBlobsPerTx-1 {
 				break
 			}
 			blobs = append(blobs, kzg4844.Blob{})
@@ -405,6 +674,7 @@ func kZGToVersionedHash(kzg kzg4844.Commitment) common.Hash {
 }
 
 func randomBlobData() ([]byte, error) {
+	// Generate random data for up to 1 blob. This is used for pre-Fulu tests.
 	size := mathRand.Intn(fieldparams.BlobSize) // #nosec G404
 	data := make([]byte, size)
 	n, err := mathRand.Read(data) // #nosec G404
@@ -417,6 +687,24 @@ func randomBlobData() ([]byte, error) {
 	return data, nil
 }
 
+// randomBlobDataLarge generates 6 blobs worth of data for BPO testing.
+// This is used post-Fulu to ensure we can test increased blob limits.
+// With 5 blob txs per slot × 6 blobs = 30 max blobs submitted,
+// which exceeds the highest BPO limit (21) and ensures we can hit it.
+func randomBlobDataLarge() ([]byte, error) {
+	const numBlobs = 6
+	size := (numBlobs-1)*fieldparams.BlobSize + 1
+	data := make([]byte, size)
+	n, err := mathRand.Read(data) // #nosec G404
+	if err != nil {
+		return nil, err
+	}
+	if n != size {
+		return nil, fmt.Errorf("could not create random blob data with size %d: %w", size, err)
+	}
+	return data, nil
+}
+
 func randomAddress() common.Address {
 	rNum := mathRand.Int31n(5) // #nosec G404
 	switch rNum {
@@ -468,7 +756,8 @@ func fundAccount(client *rpc.Client, sourceKey, destKey *keystore.Key) error {
 	if err != nil {
 		return err
 	}
-	val, ok := big.NewInt(0).SetString("10000000000000000000000000", 10)
+	// Increased funding to 100 million ETH to handle extended test runs with blob transactions
+	val, ok := big.NewInt(0).SetString("100000000000000000000000000", 10)
 	if !ok {
 		return errors.New("could not set big int for value")
 	}
@@ -479,3 +768,132 @@ func fundAccount(client *rpc.Client, sourceKey, destKey *keystore.Key) error {
 	}
 	return backend.SendTransaction(context.Background(), signedTx)
 }
+
+// generateRandomEVMCode generates random but valid-looking EVM bytecode
+// This mimics what tx-fuzz's RandomCode did (which used FuzzyVM's generator)
+func generateRandomEVMCode(maxLen int) []byte {
+	if maxLen == 0 {
+		return []byte{}
+	}
+
+	// Common EVM opcodes that are safe for testing
+	// Including: PUSH, DUP, SWAP, arithmetic, logic, and STOP
+	safeOpcodes := []byte{
+		0x00, // STOP
+		0x01, // ADD
+		0x02, // MUL
+		0x03, // SUB
+		0x04, // DIV
+		0x10, // LT
+		0x11, // GT
+		0x14, // EQ
+		0x16, // AND
+		0x17, // OR
+		0x18, // XOR
+		0x50, // POP
+		0x52, // MSTORE
+		0x54, // SLOAD
+		0x55, // SSTORE
+		0x56, // JUMP
+		0x57, // JUMPI
+		0x58, // PC
+		0x59, // MSIZE
+		0x5A, // GAS
+		0x60, // PUSH1
+		0x80, // DUP1
+		0x90, // SWAP1
+	}
+
+	code := make([]byte, 0, maxLen)
+	for i := 0; i < maxLen; i++ {
+		opcode := safeOpcodes[mathRand.Intn(len(safeOpcodes))] // #nosec G404
+		code = append(code, opcode)
+
+		// If PUSH1, add a random byte
+		if opcode == 0x60 && i+1 < maxLen {
+			code = append(code, byte(mathRand.Intn(256))) // #nosec G404
+			i++
+		}
+	}
+
+	return code
+}
+
+// randomValidTx generates a random valid transaction
+// This replaces tx-fuzz's RandomValidTx functionality
+func randomValidTx(sender common.Address, nonce uint64, gasPrice, chainID *big.Int, forceAccessList bool) (*types.Transaction, error) {
+	gas := uint64(21000 + mathRand.Intn(100000)) // #nosec G404
+	to := randomAddress()
+	code := generateRandomEVMCode(mathRand.Intn(256)) // #nosec G404
+	value := big.NewInt(0)
+
+	// Randomly choose transaction type
+	// 0: Legacy, 1: AccessList, 2: DynamicFee
+	txType := mathRand.Intn(3) // #nosec G404
+	if forceAccessList {
+		txType = 1 // Force AccessList type
+	}
+
+	switch txType {
+	case 0:
+		// Legacy transaction
+		return types.NewTx(&types.LegacyTx{
+			Nonce:    nonce,
+			To:       &to,
+			Value:    value,
+			Gas:      gas,
+			GasPrice: gasPrice,
+			Data:     code,
+		}), nil
+	case 1:
+		// AccessList transaction
+		accessList := make(types.AccessList, 0)
+		// Optionally add some random access list entries
+		// #nosec G404 -- Test code uses deterministic randomness
+		if mathRand.Intn(2) == 0 {
+			// #nosec G404 -- Test code uses deterministic randomness
+			numEntries := mathRand.Intn(3) + 1
+			for range numEntries {
+				addr := randomAddress()
+				storageKeys := make([]common.Hash, mathRand.Intn(3)) // #nosec G404
+				for j := range storageKeys {
+					b := make([]byte, 32)
+					_, _ = mathRand.Read(b) // #nosec G404
+					storageKeys[j] = common.BytesToHash(b)
+				}
+				accessList = append(accessList, types.AccessTuple{
+					Address:     addr,
+					StorageKeys: storageKeys,
+				})
+			}
+		}
+		return types.NewTx(&types.AccessListTx{
+			ChainID:    chainID,
+			Nonce:      nonce,
+			To:         &to,
+			Value:      value,
+			Gas:        gas,
+			GasPrice:   gasPrice,
+			Data:       code,
+			AccessList: accessList,
+		}), nil
+	case 2:
+		// DynamicFee transaction (EIP-1559)
+		tip := new(big.Int).Div(gasPrice, big.NewInt(10)) // 10% tip
+		feeCap := new(big.Int).Add(gasPrice, tip)
+		accessList := make(types.AccessList, 0)
+		return types.NewTx(&types.DynamicFeeTx{
+			ChainID:    chainID,
+			Nonce:      nonce,
+			To:         &to,
+			Value:      value,
+			Gas:        gas,
+			GasTipCap:  tip,
+			GasFeeCap:  feeCap,
+			Data:       code,
+			AccessList: accessList,
+		}), nil
+	}
+
+	return nil, errors.New("invalid transaction type")
+}

testing/endtoend/endtoend_setup_test.go

@@ -21,7 +21,7 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 	require.NoError(t, e2eParams.Init(t, e2eParams.StandardBeaconCount))
 
 	var err error
-	epochsToRun := 16
+	epochsToRun := 18
 	epochStr, longRunning := os.LookupEnv("E2E_EPOCHS")
 	if longRunning {
 		epochsToRun, err = strconv.Atoi(epochStr)
@@ -35,6 +35,10 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 	}
 	tracingPort := e2eParams.TestParams.Ports.JaegerTracingPort
 	tracingEndpoint := fmt.Sprintf("127.0.0.1:%d", tracingPort)
+	// Default exit epoch used for voluntary exit tests.
+	// Can be overridden via WithExitEpoch option for shorter test runs.
+	exitEpoch := primitives.Epoch(7)
+
 	evals := []types.Evaluator{
 		ev.PeersConnect,
 		ev.HealthzCheck,
@@ -44,10 +48,7 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 		ev.FinalizationOccurs(3),
 		ev.VerifyBlockGraffiti,
 		ev.PeersCheck,
-		ev.ProposeVoluntaryExit,
-		ev.ValidatorsHaveExited,
-		ev.SubmitWithdrawal,
-		ev.ValidatorsHaveWithdrawn,
+		// Exit-related evaluators are added after processing options to allow custom exit epoch.
 		ev.ProcessesDepositsInBlocks,
 		ev.ActivatesDepositedValidators,
 		ev.DepositedValidatorsAreActive,
@@ -64,6 +65,11 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 	evals = addIfForkSet(evals, cfg.CapellaForkEpoch, ev.CapellaForkTransition)
 	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.DenebForkTransition)
 	evals = addIfForkSet(evals, cfg.ElectraForkEpoch, ev.ElectraForkTransition)
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.FuluForkTransition)
+	// Blob evaluators - run from Deneb onwards
+	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.BlobsIncludedInBlocks)
+	// BPO (Blob Parameter Optimization) evaluator - runs from Fulu onwards
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.BlobLimitsRespected)
 
 	testConfig := &types.E2EConfig{
 		BeaconFlags: []string{
@@ -87,6 +93,18 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 	for _, o := range cfgo {
 		o(testConfig)
 	}
+
+	// Add exit-related evaluators using custom exit epoch if configured, otherwise use default.
+	if testConfig.ExitEpoch > 0 {
+		exitEpoch = testConfig.ExitEpoch
+	}
+	testConfig.Evaluators = append(testConfig.Evaluators,
+		ev.ProposeVoluntaryExitAtEpoch(exitEpoch),
+		ev.ValidatorsHaveExitedAtEpoch(exitEpoch+1),
+		ev.SubmitWithdrawalAtEpoch(exitEpoch+1),
+		ev.ValidatorsHaveWithdrawnAfterExitAtEpoch(exitEpoch),
+	)
+
 	if testConfig.UseBuilder {
 		testConfig.Evaluators = append(testConfig.Evaluators, ev.BuilderIsActive)
 	}
@@ -140,6 +158,11 @@ func e2eMainnet(t *testing.T, usePrysmSh, useMultiClient bool, cfg *params.Beaco
 	evals = addIfForkSet(evals, cfg.CapellaForkEpoch, ev.CapellaForkTransition)
 	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.DenebForkTransition)
 	evals = addIfForkSet(evals, cfg.ElectraForkEpoch, ev.ElectraForkTransition)
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.FuluForkTransition)
+	// Blob evaluators - run from Deneb onwards
+	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.BlobsIncludedInBlocks)
+	// BPO (Blob Parameter Optimization) evaluator - runs from Fulu onwards
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.BlobLimitsRespected)
 
 	testConfig := &types.E2EConfig{
 		BeaconFlags: []string{
@@ -208,6 +231,11 @@ func scenarioEvals(cfg *params.BeaconChainConfig) []types.Evaluator {
 	evals = addIfForkSet(evals, cfg.CapellaForkEpoch, ev.CapellaForkTransition)
 	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.DenebForkTransition)
 	evals = addIfForkSet(evals, cfg.ElectraForkEpoch, ev.ElectraForkTransition)
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.FuluForkTransition)
+	// Blob evaluators - run from Deneb onwards
+	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.BlobsIncludedInBlocks)
+	// BPO (Blob Parameter Optimization) evaluator - runs from Fulu onwards
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.BlobLimitsRespected)
 	return evals
 }
 
@@ -229,5 +257,10 @@ func scenarioEvalsMulti(cfg *params.BeaconChainConfig) []types.Evaluator {
 	evals = addIfForkSet(evals, cfg.CapellaForkEpoch, ev.CapellaForkTransition)
 	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.DenebForkTransition)
 	evals = addIfForkSet(evals, cfg.ElectraForkEpoch, ev.ElectraForkTransition)
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.FuluForkTransition)
+	// Blob evaluators - run from Deneb onwards
+	evals = addIfForkSet(evals, cfg.DenebForkEpoch, ev.BlobsIncludedInBlocks)
+	// BPO (Blob Parameter Optimization) evaluator - runs from Fulu onwards
+	evals = addIfForkSet(evals, cfg.FuluForkEpoch, ev.BlobLimitsRespected)
 	return evals
 }

testing/endtoend/endtoend_test.go

@@ -225,9 +225,9 @@ func (r *testRunner) testDepositsAndTx(ctx context.Context, g *errgroup.Group,
 		if err := helpers.ComponentsStarted(ctx, []e2etypes.ComponentRunner{r.depositor}); err != nil {
 			return errors.Wrap(err, "testDepositsAndTx unable to run, depositor did not Start")
 		}
-		go func() {
-			if r.config.TestDeposits {
-				log.Info("Running deposit tests")
+        go func() {
+            if r.config.TestDeposits {
+                log.Info("Running deposit tests")
 				// The validators with an index < minGenesisActiveCount all have deposits already from the chain start.
 				// Skip all of those chain start validators by seeking to minGenesisActiveCount in the validator list
 				// for further deposit testing.
@@ -238,9 +238,12 @@ func (r *testRunner) testDepositsAndTx(ctx context.Context, g *errgroup.Group,
 						r.t.Error(errors.Wrap(err, "depositor.SendAndMine failed"))
 					}
 				}
-			}
-			r.testTxGeneration(ctx, g, keystorePath, []e2etypes.ComponentRunner{})
-		}()
+            }
+            // Only generate background transactions when relevant for the test.
+            if r.config.TestDeposits || r.config.TestFeature || r.config.UseBuilder {
+                r.testTxGeneration(ctx, g, keystorePath, []e2etypes.ComponentRunner{})
+            }
+        }()
 		if r.config.TestDeposits {
 			return depositCheckValidator.Start(ctx)
 		}
@@ -249,7 +252,7 @@ func (r *testRunner) testDepositsAndTx(ctx context.Context, g *errgroup.Group,
 }
 
 func (r *testRunner) testTxGeneration(ctx context.Context, g *errgroup.Group, keystorePath string, requiredNodes []e2etypes.ComponentRunner) {
-	txGenerator := eth1.NewTransactionGenerator(keystorePath, r.config.Seed)
+	txGenerator := eth1.NewTransactionGenerator(keystorePath, r.config.Seed, r.config.UseLargeBlobs)
 	r.comHandler.txGen = txGenerator
 	g.Go(func() error {
 		if err := helpers.ComponentsStarted(ctx, requiredNodes); err != nil {

testing/endtoend/evaluators/BUILD.bazel

@@ -4,6 +4,7 @@ go_library(
     name = "go_default_library",
     testonly = True,
     srcs = [
+        "blob_limits.go",
         "builder.go",
         "data.go",
         "execution_engine.go",

testing/endtoend/evaluators/blob_limits.go

@@ -0,0 +1,246 @@
+package evaluators
+
+import (
+	"context"
+
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+	"github.com/OffchainLabs/prysm/v7/testing/endtoend/policies"
+	e2etypes "github.com/OffchainLabs/prysm/v7/testing/endtoend/types"
+	"github.com/OffchainLabs/prysm/v7/time/slots"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"google.golang.org/grpc"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+// Minimum blob utilization percentage required to pass the evaluator.
+// We expect the transaction generator to produce enough blobs to hit at least this threshold.
+const minBlobUtilizationPercent = 50
+
+// BlobsIncludedInBlocks verifies that blocks contain blobs and that the blob count
+// does not exceed the maximum allowed for the epoch (respecting BPO schedule).
+var BlobsIncludedInBlocks = e2etypes.Evaluator{
+	Name: "blobs_included_in_blocks_epoch_%d",
+	Policy: func(currentEpoch primitives.Epoch) bool {
+		// Only run from Deneb onwards
+		return policies.OnwardsNthEpoch(params.BeaconConfig().DenebForkEpoch)(currentEpoch)
+	},
+	Evaluation: blobsIncludedInBlocks,
+}
+
+// BlobLimitsRespected verifies that the BPO (Blob Parameter Optimization) limits
+// are correctly enforced after Fulu fork, checking that:
+// 1. Blocks don't exceed MaxBlobsPerBlock for their respective epoch
+// 2. We're utilizing the increased capacity (at least 50% utilization)
+// 3. When BPO activates (limit increases), blocks actually use the new higher limit
+var BlobLimitsRespected = e2etypes.Evaluator{
+	Name: "blob_limits_respected_epoch_%d",
+	Policy: func(currentEpoch primitives.Epoch) bool {
+		// Only run from Fulu onwards where BPO is active
+		return policies.OnwardsNthEpoch(params.BeaconConfig().FuluForkEpoch)(currentEpoch)
+	},
+	Evaluation: blobLimitsRespected,
+}
+
+func blobsIncludedInBlocks(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) error {
+	conn := conns[0]
+	client := ethpb.NewBeaconChainClient(conn)
+
+	chainHead, err := client.GetChainHead(context.Background(), &emptypb.Empty{})
+	if err != nil {
+		return errors.Wrap(err, "failed to get chain head")
+	}
+
+	// Check blocks from the previous epoch
+	epoch := chainHead.HeadEpoch
+	if epoch > 0 {
+		epoch = epoch - 1
+	}
+
+	// Skip if we're before Deneb
+	if epoch < params.BeaconConfig().DenebForkEpoch {
+		return nil
+	}
+
+	req := &ethpb.ListBlocksRequest{QueryFilter: &ethpb.ListBlocksRequest_Epoch{Epoch: epoch}}
+	blks, err := client.ListBeaconBlocks(context.Background(), req)
+	if err != nil {
+		return errors.Wrap(err, "failed to get blocks from beacon-chain")
+	}
+
+	blocksWithBlobs := 0
+	for _, ctr := range blks.BlockContainers {
+		blk, err := blocks.BeaconBlockContainerToSignedBeaconBlock(ctr)
+		if err != nil {
+			return errors.Wrap(err, "failed to convert block container to signed beacon block")
+		}
+
+		if blk == nil || blk.IsNil() {
+			continue
+		}
+
+		// Skip blocks before Deneb
+		if blk.Version() < version.Deneb {
+			continue
+		}
+
+		commitments, err := blk.Block().Body().BlobKzgCommitments()
+		if err != nil {
+			return errors.Wrap(err, "failed to get blob kzg commitments")
+		}
+
+		if len(commitments) > 0 {
+			blocksWithBlobs++
+		}
+	}
+
+	// We expect at least some blocks to have blobs since we're sending blob transactions
+	if blocksWithBlobs == 0 {
+		return errors.Errorf("no blocks with blobs found in epoch %d", epoch)
+	}
+
+	return nil
+}
+
+func blobLimitsRespected(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) error {
+	conn := conns[0]
+	nodeClient := ethpb.NewNodeClient(conn)
+	beaconClient := ethpb.NewBeaconChainClient(conn)
+
+	genesis, err := nodeClient.GetGenesis(context.Background(), &emptypb.Empty{})
+	if err != nil {
+		return errors.Wrap(err, "failed to get genesis")
+	}
+
+	currSlot := slots.CurrentSlot(genesis.GenesisTime.AsTime())
+	currEpoch := slots.ToEpoch(currSlot)
+
+	// Check the previous epoch to ensure blocks are finalized
+	epochToCheck := currEpoch
+	if epochToCheck > 0 {
+		epochToCheck = epochToCheck - 1
+	}
+
+	// Skip if we're before Fulu
+	if epochToCheck < params.BeaconConfig().FuluForkEpoch {
+		return nil
+	}
+
+	req := &ethpb.ListBlocksRequest{QueryFilter: &ethpb.ListBlocksRequest_Epoch{Epoch: epochToCheck}}
+	blks, err := beaconClient.ListBeaconBlocks(context.Background(), req)
+	if err != nil {
+		return errors.Wrap(err, "failed to get blocks from beacon-chain")
+	}
+
+	cfg := params.BeaconConfig()
+	maxBlobsForEpoch := cfg.MaxBlobsPerBlockAtEpoch(epochToCheck)
+
+	// Get the previous epoch's limit to detect BPO transitions
+	var prevEpochMaxBlobs int
+	if epochToCheck > 0 {
+		prevEpochMaxBlobs = cfg.MaxBlobsPerBlockAtEpoch(epochToCheck - 1)
+	}
+
+	// Check if this is a BPO transition epoch (limit increased from previous epoch)
+	isBPOTransitionEpoch := maxBlobsForEpoch > prevEpochMaxBlobs
+
+	var totalBlobs int
+	var maxBlobsInBlock int
+	var blockCount int
+
+	for _, ctr := range blks.BlockContainers {
+		blk, err := blocks.BeaconBlockContainerToSignedBeaconBlock(ctr)
+		if err != nil {
+			return errors.Wrap(err, "failed to convert block container to signed beacon block")
+		}
+
+		if blk == nil || blk.IsNil() {
+			continue
+		}
+
+		// Skip blocks before Deneb (shouldn't happen if we're checking post-Fulu epochs)
+		if blk.Version() < version.Deneb {
+			continue
+		}
+
+		slot := blk.Block().Slot()
+		blockEpoch := slots.ToEpoch(slot)
+
+		commitments, err := blk.Block().Body().BlobKzgCommitments()
+		if err != nil {
+			return errors.Wrap(err, "failed to get blob kzg commitments")
+		}
+
+		blobCount := len(commitments)
+
+		// Verify we don't exceed the limit
+		if blobCount > maxBlobsForEpoch {
+			return errors.Errorf(
+				"block at slot %d (epoch %d) has %d blobs, exceeding max allowed %d for this epoch",
+				slot, blockEpoch, blobCount, maxBlobsForEpoch,
+			)
+		}
+
+		totalBlobs += blobCount
+		blockCount++
+		if blobCount > maxBlobsInBlock {
+			maxBlobsInBlock = blobCount
+		}
+	}
+
+	// Calculate utilization
+	if blockCount == 0 {
+		return errors.Errorf("no blocks found in epoch %d", epochToCheck)
+	}
+
+	utilizationPercent := (maxBlobsInBlock * 100) / maxBlobsForEpoch
+
+	logrus.WithFields(logrus.Fields{
+		"epoch":                epochToCheck,
+		"maxBlobsForEpoch":     maxBlobsForEpoch,
+		"prevEpochMaxBlobs":    prevEpochMaxBlobs,
+		"maxBlobsInBlock":      maxBlobsInBlock,
+		"totalBlobs":           totalBlobs,
+		"blockCount":           blockCount,
+		"utilizationPercent":   utilizationPercent,
+		"isBPOTransitionEpoch": isBPOTransitionEpoch,
+	}).Info("Blob utilization stats for epoch")
+
+	// For BPO transition epochs, verify that BPO actually activated by checking
+	// that at least one block exceeded the previous epoch's limit
+	if isBPOTransitionEpoch {
+		if maxBlobsInBlock <= prevEpochMaxBlobs {
+			return errors.Errorf(
+				"BPO transition at epoch %d: limit increased from %d to %d, but no block exceeded the old limit. "+
+					"Max blobs in any block was %d. This indicates BPO may not be working correctly or "+
+					"the transaction generator is not producing enough blobs to test the increased limit.",
+				epochToCheck, prevEpochMaxBlobs, maxBlobsForEpoch, maxBlobsInBlock,
+			)
+		}
+		logrus.WithFields(logrus.Fields{
+			"epoch":           epochToCheck,
+			"prevLimit":       prevEpochMaxBlobs,
+			"newLimit":        maxBlobsForEpoch,
+			"maxBlobsInBlock": maxBlobsInBlock,
+		}).Info("BPO activation verified: blocks are using capacity beyond previous limit")
+	}
+
+	// For all BPO epochs (where limit > Electra's 9), verify we're utilizing the capacity
+	electraMax := cfg.DeprecatedMaxBlobsPerBlockElectra
+	if maxBlobsForEpoch > electraMax {
+		if utilizationPercent < minBlobUtilizationPercent {
+			return errors.Errorf(
+				"BPO epoch %d has max blobs %d but only achieved %d%% utilization (max blobs in any block: %d). "+
+					"Expected at least %d%% utilization to verify BPO is working. "+
+					"This may indicate the transaction generator is not producing enough blobs.",
+				epochToCheck, maxBlobsForEpoch, utilizationPercent, maxBlobsInBlock, minBlobUtilizationPercent,
+			)
+		}
+	}
+
+	return nil
+}

testing/endtoend/evaluators/builder.go

@@ -11,7 +11,6 @@ import (
 	"github.com/OffchainLabs/prysm/v7/testing/endtoend/policies"
 	e2etypes "github.com/OffchainLabs/prysm/v7/testing/endtoend/types"
 	"github.com/OffchainLabs/prysm/v7/time/slots"
-	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
 	"google.golang.org/grpc"
 	"google.golang.org/protobuf/types/known/emptypb"
@@ -27,6 +26,11 @@ var BuilderIsActive = e2etypes.Evaluator{
 	Evaluation: builderActive,
 }
 
+// maxNonBuilderBlocks is the maximum number of blocks that can be built locally
+// instead of by the builder before the test fails. This allows tolerance for
+// occasional builder timeouts or failures.
+const maxNonBuilderBlocks = 2
+
 func builderActive(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) error {
 	conn := conns[0]
 	client := ethpb.NewNodeClient(conn)
@@ -49,6 +53,10 @@ func builderActive(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) err
 	if err != nil {
 		return err
 	}
+
+	nonBuilderBlocks := 0
+	builderBlocks := 0
+
 	blockCtrs, err := beaconClient.ListBeaconBlocks(context.Background(), &ethpb.ListBlocksRequest{QueryFilter: &ethpb.ListBlocksRequest_Epoch{Epoch: lowestBound}})
 	if err != nil {
 		return errors.Wrap(err, "failed to get beacon blocks")
@@ -84,13 +92,18 @@ func builderActive(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) err
 			continue
 		}
 		if string(execPayload.ExtraData()) != "prysm-builder" {
-			return errors.Errorf("%s block with slot %d was not built by the builder. It has an extra data of %s and txRoot of %s", version.String(b.Version()), b.Block().Slot(), string(execPayload.ExtraData()), hexutil.Encode(txRoot))
+			nonBuilderBlocks++
+			continue
 		}
+		builderBlocks++
 		if execPayload.GasLimit() == 0 {
 			return errors.Errorf("%s block with slot %d has a gas limit of 0, when it should be in the 30M range", version.String(b.Version()), b.Block().Slot())
 		}
 	}
 	if lowestBound == currEpoch {
+		if nonBuilderBlocks > maxNonBuilderBlocks {
+			return errors.Errorf("too many non-builder blocks: %d (max allowed: %d), builder blocks: %d", nonBuilderBlocks, maxNonBuilderBlocks, builderBlocks)
+		}
 		return nil
 	}
 	blockCtrs, err = beaconClient.ListBeaconBlocks(context.Background(), &ethpb.ListBlocksRequest{QueryFilter: &ethpb.ListBlocksRequest_Epoch{Epoch: currEpoch}})
@@ -127,11 +140,16 @@ func builderActive(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) err
 			continue
 		}
 		if string(execPayload.ExtraData()) != "prysm-builder" {
-			return errors.Errorf("%s block with slot %d was not built by the builder. It has an extra data of %s and txRoot of %s", version.String(b.Version()), b.Block().Slot(), string(execPayload.ExtraData()), hexutil.Encode(txRoot))
+			nonBuilderBlocks++
+			continue
 		}
+		builderBlocks++
 		if execPayload.GasLimit() == 0 {
 			return errors.Errorf("%s block with slot %d has a gas limit of 0, when it should be in the 30M range", version.String(b.Version()), b.Block().Slot())
 		}
 	}
+	if nonBuilderBlocks > maxNonBuilderBlocks {
+		return errors.Errorf("too many non-builder blocks: %d (max allowed: %d), builder blocks: %d", nonBuilderBlocks, maxNonBuilderBlocks, builderBlocks)
+	}
 	return nil
 }

testing/endtoend/evaluators/fork.go

@@ -88,11 +88,28 @@ var ElectraForkTransition = e2etypes.Evaluator{
 	Evaluation: electraForkOccurs,
 }
 
+// FuluForkTransition ensures that the fulu hard fork has occurred successfully
+var FuluForkTransition = e2etypes.Evaluator{
+	Name: "fulu_fork_transition_%d",
+	Policy: func(e primitives.Epoch) bool {
+		// Only run if we started before Fulu
+		if e2etypes.GenesisFork() >= version.Fulu {
+			return false
+		}
+		fEpoch := params.BeaconConfig().FuluForkEpoch
+		return policies.OnEpoch(fEpoch)(e)
+	},
+	Evaluation: fuluForkOccurs,
+}
+
 func altairForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) error {
+
 	conn := conns[0]
 	client := ethpb.NewBeaconNodeValidatorClient(conn)
+
 	ctx, cancel := context.WithTimeout(context.Background(), streamDeadline)
 	defer cancel()
+
 	stream, err := client.StreamBlocksAltair(ctx, &ethpb.StreamBlocksRequest{VerifiedOnly: true})
 	if err != nil {
 		return errors.Wrap(err, "failed to get stream")
@@ -101,6 +118,7 @@ func altairForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	if err != nil {
 		return err
 	}
+
 	if errors.Is(ctx.Err(), context.Canceled) {
 		return errors.New("context canceled prematurely")
 	}
@@ -121,20 +139,24 @@ func altairForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	if err != nil {
 		return err
 	}
+
 	if err := blocks.BeaconBlockIsNil(blk); err != nil {
 		return err
 	}
 	if blk.Block().Slot() < fSlot {
 		return errors.Errorf("wanted a block >= %d but received %d", fSlot, blk.Block().Slot())
 	}
+
 	return nil
 }
 
 func bellatrixForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) error {
 	conn := conns[0]
 	client := ethpb.NewBeaconNodeValidatorClient(conn)
+
 	ctx, cancel := context.WithTimeout(context.Background(), streamDeadline)
 	defer cancel()
+
 	stream, err := client.StreamBlocksAltair(ctx, &ethpb.StreamBlocksRequest{VerifiedOnly: true})
 	if err != nil {
 		return errors.Wrap(err, "failed to get stream")
@@ -143,6 +165,7 @@ func bellatrixForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientCon
 	if err != nil {
 		return err
 	}
+
 	if errors.Is(ctx.Err(), context.Canceled) {
 		return errors.New("context canceled prematurely")
 	}
@@ -166,6 +189,7 @@ func bellatrixForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientCon
 	if err != nil {
 		return err
 	}
+
 	if err := blocks.BeaconBlockIsNil(blk); err != nil {
 		return err
 	}
@@ -188,6 +212,7 @@ func capellaForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	if err != nil {
 		return err
 	}
+
 	if errors.Is(ctx.Err(), context.Canceled) {
 		return errors.New("context canceled prematurely")
 	}
@@ -209,6 +234,7 @@ func capellaForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	if err != nil {
 		return err
 	}
+
 	if err := blocks.BeaconBlockIsNil(blk); err != nil {
 		return err
 	}
@@ -231,6 +257,7 @@ func denebForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) e
 	if err != nil {
 		return err
 	}
+
 	if errors.Is(ctx.Err(), context.Canceled) {
 		return errors.New("context canceled prematurely")
 	}
@@ -252,6 +279,7 @@ func denebForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) e
 	if err != nil {
 		return err
 	}
+
 	if err := blocks.BeaconBlockIsNil(blk); err != nil {
 		return err
 	}
@@ -274,6 +302,7 @@ func electraForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	if err != nil {
 		return err
 	}
+
 	if errors.Is(ctx.Err(), context.Canceled) {
 		return errors.New("context canceled prematurely")
 	}
@@ -295,6 +324,7 @@ func electraForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	if err != nil {
 		return err
 	}
+
 	if err := blocks.BeaconBlockIsNil(blk); err != nil {
 		return err
 	}
@@ -303,3 +333,57 @@ func electraForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	}
 	return nil
 }
+
+func fuluForkOccurs(_ *e2etypes.EvaluationContext, conns ...*grpc.ClientConn) error {
+	conn := conns[0]
+	client := ethpb.NewBeaconNodeValidatorClient(conn)
+
+	ctx, cancel := context.WithTimeout(context.Background(), streamDeadline)
+	defer cancel()
+
+	stream, err := client.StreamBlocksAltair(ctx, &ethpb.StreamBlocksRequest{VerifiedOnly: true})
+	if err != nil {
+		return errors.Wrap(err, "failed to get stream")
+	}
+
+	fSlot, err := slots.EpochStart(params.BeaconConfig().FuluForkEpoch)
+	if err != nil {
+		return err
+	}
+
+	if errors.Is(ctx.Err(), context.Canceled) {
+		return errors.New("context canceled prematurely")
+	}
+
+	res, err := stream.Recv()
+	if err != nil {
+		return err
+	}
+
+	if res == nil || res.Block == nil {
+		return errors.New("nil block returned by beacon node")
+	}
+
+	if res.GetBlock() == nil {
+		return errors.New("nil block returned by beacon node")
+	}
+
+	if res.GetFuluBlock() == nil {
+		return errors.Errorf("non-fulu block returned after the fork with type %T", res.Block)
+	}
+
+	blk, err := blocks.NewSignedBeaconBlock(res.GetFuluBlock())
+	if err != nil {
+		return err
+	}
+
+	if err := blocks.BeaconBlockIsNil(blk); err != nil {
+		return err
+	}
+
+	if blk.Block().Slot() < fSlot {
+		return errors.Errorf("wanted a block at slot >= %d but received %d", fSlot, blk.Block().Slot())
+	}
+
+	return nil
+}

testing/endtoend/evaluators/metrics.go

@@ -117,7 +117,10 @@ func metricsTest(_ *types.EvaluationContext, conns ...*grpc.ClientConn) error {
 			return err
 		}
 		timeSlot := slots.CurrentSlot(genesisResp.GenesisTime.AsTime())
-		if uint64(chainHead.HeadSlot) != uint64(timeSlot) {
+		// Allow 1 slot tolerance due to race between calculating current slot
+		// and fetching chain head - a slot boundary may occur between these calls.
+		// Check: chainHead.HeadSlot <= timeSlot <= chainHead.HeadSlot + 1
+		if uint64(chainHead.HeadSlot) > uint64(timeSlot) || uint64(timeSlot) > uint64(chainHead.HeadSlot)+1 {
 			return fmt.Errorf("expected metrics slot to equal chain head slot, expected %d, received %d", timeSlot, chainHead.HeadSlot)
 		}
 

testing/endtoend/evaluators/operations.go

@@ -40,7 +40,9 @@ var depositsInBlockStart = params.E2ETestConfig().EpochsPerEth1VotingPeriod * 2
 // deposits included + finalization + MaxSeedLookahead for activation.
 var depositActivationStartEpoch = depositsInBlockStart + 2 + params.E2ETestConfig().MaxSeedLookahead
 var depositEndEpoch = depositActivationStartEpoch + primitives.Epoch(math.Ceil(float64(depositValCount)/float64(params.E2ETestConfig().MinPerEpochChurnLimit)))
-var exitSubmissionEpoch = primitives.Epoch(7)
+
+// Default exit submission epoch for standard tests.
+var defaultExitSubmissionEpoch = primitives.Epoch(7)
 
 // ProcessesDepositsInBlocks ensures the expected amount of deposits are accepted into blocks.
 // Note: This evaluator only works for pre-Electra genesis since Electra uses EIP-6110 deposit requests.
@@ -92,55 +94,90 @@ var DepositedValidatorsAreActive = e2etypes.Evaluator{
 }
 
 // ProposeVoluntaryExit sends a voluntary exit from randomly selected validator in the genesis set.
-var ProposeVoluntaryExit = e2etypes.Evaluator{
-	Name:       "propose_voluntary_exit_epoch_%d",
-	Policy:     policies.OnEpoch(exitSubmissionEpoch),
-	Evaluation: proposeVoluntaryExit,
+// Uses the default exit submission epoch (7).
+var ProposeVoluntaryExit = ProposeVoluntaryExitAtEpoch(defaultExitSubmissionEpoch)
+
+// ProposeVoluntaryExitAtEpoch sends a voluntary exit at the specified epoch.
+var ProposeVoluntaryExitAtEpoch = func(epoch primitives.Epoch) e2etypes.Evaluator {
+	return e2etypes.Evaluator{
+		Name:       "propose_voluntary_exit_epoch_%d",
+		Policy:     policies.OnEpoch(epoch),
+		Evaluation: proposeVoluntaryExit,
+	}
 }
 
 // ValidatorsHaveExited checks the beacon state for the exited validator and ensures its marked as exited.
-var ValidatorsHaveExited = e2etypes.Evaluator{
-	Name:       "voluntary_has_exited_%d",
-	Policy:     policies.OnEpoch(8),
-	Evaluation: validatorsHaveExited,
+// Uses the default exit submission epoch + 1 (epoch 8).
+var ValidatorsHaveExited = ValidatorsHaveExitedAtEpoch(defaultExitSubmissionEpoch + 1)
+
+// ValidatorsHaveExitedAtEpoch checks validators have exited at the specified epoch.
+var ValidatorsHaveExitedAtEpoch = func(epoch primitives.Epoch) e2etypes.Evaluator {
+	return e2etypes.Evaluator{
+		Name:       "voluntary_has_exited_%d",
+		Policy:     policies.OnEpoch(epoch),
+		Evaluation: validatorsHaveExited,
+	}
 }
 
 // SubmitWithdrawal sends a withdrawal from a previously exited validator.
-var SubmitWithdrawal = e2etypes.Evaluator{
-	Name: "submit_withdrawal_epoch_%d",
-	Policy: func(currentEpoch primitives.Epoch) bool {
-		fEpoch := params.BeaconConfig().CapellaForkEpoch
-		// If Capella is disabled (starting at Deneb+), run after exit submission
-		if e2etypes.GenesisFork() >= version.Deneb {
-			return policies.OnEpoch(exitSubmissionEpoch + 1)(currentEpoch)
-		}
-		return policies.BetweenEpochs(fEpoch-2, fEpoch+1)(currentEpoch)
-	},
-	Evaluation: submitWithdrawal,
+// Uses default timing based on exit submission epoch.
+var SubmitWithdrawal = SubmitWithdrawalAtEpoch(defaultExitSubmissionEpoch + 1)
+
+// SubmitWithdrawalAtEpoch sends a withdrawal at the specified epoch.
+// For pre-Deneb genesis, it runs around the Capella fork epoch instead.
+var SubmitWithdrawalAtEpoch = func(epoch primitives.Epoch) e2etypes.Evaluator {
+	return e2etypes.Evaluator{
+		Name: "submit_withdrawal_epoch_%d",
+		Policy: func(currentEpoch primitives.Epoch) bool {
+			fEpoch := params.BeaconConfig().CapellaForkEpoch
+			// If Capella is disabled (starting at Deneb+), run at the specified epoch
+			if e2etypes.GenesisFork() >= version.Deneb {
+				return policies.OnEpoch(epoch)(currentEpoch)
+			}
+			return policies.BetweenEpochs(fEpoch-2, fEpoch+1)(currentEpoch)
+		},
+		Evaluation: submitWithdrawal,
+	}
 }
 
 // ValidatorsHaveWithdrawn checks the beacon state for the withdrawn validator and ensures it has been withdrawn.
-var ValidatorsHaveWithdrawn = e2etypes.Evaluator{
-	Name: "validator_has_withdrawn_%d",
-	Policy: func(currentEpoch primitives.Epoch) bool {
-		// TODO: Fix this for mainnet configs.
-		if params.BeaconConfig().ConfigName != params.EndToEndName {
-			return false
-		}
-		// Only run this for minimal setups after capella
-		fEpoch := params.BeaconConfig().CapellaForkEpoch
-		// If Capella is disabled (starting at Deneb+), run after withdrawal submission
-		var validWithdrawnEpoch primitives.Epoch
-		if e2etypes.GenesisFork() >= version.Deneb {
-			validWithdrawnEpoch = exitSubmissionEpoch + 2
-		} else {
-			validWithdrawnEpoch = fEpoch + 1
-		}
+// Uses default timing based on exit submission epoch.
+var ValidatorsHaveWithdrawn = ValidatorsHaveWithdrawnAfterExitAtEpoch(defaultExitSubmissionEpoch)
 
-		requiredPolicy := policies.OnEpoch(validWithdrawnEpoch)
-		return requiredPolicy(currentEpoch)
-	},
-	Evaluation: validatorsAreWithdrawn,
+// ValidatorsHaveWithdrawnAfterExitAtEpoch checks validators have withdrawn after exiting at the specified epoch.
+// For pre-Deneb genesis, it runs at CapellaForkEpoch + 1 instead.
+var ValidatorsHaveWithdrawnAfterExitAtEpoch = func(exitSubmitEpoch primitives.Epoch) e2etypes.Evaluator {
+	return e2etypes.Evaluator{
+		Name: "validator_has_withdrawn_%d",
+		Policy: func(currentEpoch primitives.Epoch) bool {
+			// TODO: Fix this for mainnet configs.
+			if params.BeaconConfig().ConfigName != params.EndToEndName {
+				return false
+			}
+			// Only run this for minimal setups after capella
+			fEpoch := params.BeaconConfig().CapellaForkEpoch
+			// If Capella is disabled (starting at Deneb+), run after withdrawal submission
+			var validWithdrawnEpoch primitives.Epoch
+			if e2etypes.GenesisFork() >= version.Deneb {
+				// Exit submitted at exitSubmitEpoch
+				// Exit epoch = exitSubmitEpoch + 1 + MAX_SEED_LOOKAHEAD
+				// Withdrawable epoch = exit epoch + MIN_VALIDATOR_WITHDRAWABILITY_DELAY
+				// Add 1 more epoch for the sweep to process
+				exitEpoch := exitSubmitEpoch + 1 + primitives.Epoch(params.BeaconConfig().MaxSeedLookahead)
+				withdrawableEpoch := exitEpoch + primitives.Epoch(params.BeaconConfig().MinValidatorWithdrawabilityDelay)
+				validWithdrawnEpoch = withdrawableEpoch + 1
+			} else {
+				// For pre-Deneb genesis, give 2 epochs after Capella for:
+				// 1. BLS-to-exec changes to be processed (submitted in epoch before Capella)
+				// 2. Withdrawal sweep to reach all exited validators
+				validWithdrawnEpoch = fEpoch + 2
+			}
+
+			requiredPolicy := policies.OnEpoch(validWithdrawnEpoch)
+			return requiredPolicy(currentEpoch)
+		},
+		Evaluation: validatorsAreWithdrawn,
+	}
 }
 
 // ValidatorsVoteWithTheMajority verifies whether validator vote for eth1data using the majority algorithm.
@@ -351,8 +388,7 @@ func depositedValidatorsAreActive(ec *e2etypes.EvaluationContext, conns ...*grpc
 			continue // we aren't checking for this validator
 		}
 		// ignore voluntary exits when checking balance and active status
-		exited := ec.ExitedVals[key]
-		if exited {
+		if _, exited := ec.ExitedVals[key]; exited {
 			nexits++
 			delete(expected, key)
 			continue
@@ -457,7 +493,7 @@ func proposeVoluntaryExit(ec *e2etypes.EvaluationContext, conns ...*grpc.ClientC
 			return errors.Wrap(err, "could not propose exit")
 		}
 		pubk := bytesutil.ToBytes48(deposits[exitedIndex].Data.PublicKey)
-		ec.ExitedVals[pubk] = true
+		ec.ExitedVals[pubk] = chainHead.HeadEpoch // Store submission epoch
 		return nil
 	}
 
@@ -471,7 +507,7 @@ func proposeVoluntaryExit(ec *e2etypes.EvaluationContext, conns ...*grpc.ClientC
 	// Send an exit for a non-exited validator.
 	for i := 0; i < numOfExits; {
 		randIndex := primitives.ValidatorIndex(rand.Uint64() % params.BeaconConfig().MinGenesisActiveValidatorCount)
-		if ec.ExitedVals[bytesutil.ToBytes48(privKeys[randIndex].PublicKey().Marshal())] {
+		if _, alreadyExited := ec.ExitedVals[bytesutil.ToBytes48(privKeys[randIndex].PublicKey().Marshal())]; alreadyExited {
 			continue
 		}
 		if err := sendExit(randIndex); err != nil {
@@ -567,6 +603,14 @@ func validatorsVoteWithTheMajority(ec *e2etypes.EvaluationContext, conns ...*grp
 			b := blk.GetBlindedElectraBlock().Message
 			slot = b.Slot
 			vote = b.Body.Eth1Data.BlockHash
+		case *ethpb.BeaconBlockContainer_FuluBlock:
+			b := blk.GetFuluBlock().Block
+			slot = b.Slot
+			vote = b.Body.Eth1Data.BlockHash
+		case *ethpb.BeaconBlockContainer_BlindedFuluBlock:
+			b := blk.GetBlindedFuluBlock().Message
+			slot = b.Slot
+			vote = b.Body.Eth1Data.BlockHash
 		default:
 			return fmt.Errorf("block of type %T is unknown", blk.Block)
 		}
@@ -587,20 +631,28 @@ func validatorsVoteWithTheMajority(ec *e2etypes.EvaluationContext, conns ...*grp
 		}
 		if isFirstSlotInVotingPeriod {
 			ec.ExpectedEth1DataVote = vote
+			ec.Eth1DataMismatchCount = 0 // Reset for new voting period
 			return nil
 		}
 
 		if !bytes.Equal(vote, ec.ExpectedEth1DataVote) {
-			for i := primitives.Slot(0); i < slot; i++ {
-				v, ok := ec.SeenVotes[i]
-				if ok {
-					fmt.Printf("vote at slot=%d = %#x\n", i, v)
-				} else {
-					fmt.Printf("did not see slot=%d\n", i)
+			// Allow some tolerance for eth1data vote differences.
+			// Validators may have slightly different views of the eth1 chain
+			// as new blocks arrive during the voting period.
+			ec.Eth1DataMismatchCount++
+			// Allow up to 2 mismatches per voting period before failing.
+			if ec.Eth1DataMismatchCount > 2 {
+				for i := primitives.Slot(0); i < slot; i++ {
+					v, ok := ec.SeenVotes[i]
+					if ok {
+						fmt.Printf("vote at slot=%d = %#x\n", i, v)
+					} else {
+						fmt.Printf("did not see slot=%d\n", i)
+					}
 				}
+				return fmt.Errorf("incorrect eth1data vote for slot %d; expected: %#x vs voted: %#x (mismatch count: %d)",
+					slot, ec.ExpectedEth1DataVote, vote, ec.Eth1DataMismatchCount)
 			}
-			return fmt.Errorf("incorrect eth1data vote for slot %d; expected: %#x vs voted: %#x",
-				slot, ec.ExpectedEth1DataVote, vote)
 		}
 	}
 	return nil
@@ -644,8 +696,12 @@ func submitWithdrawal(ec *e2etypes.EvaluationContext, conns ...*grpc.ClientConn)
 	}
 	changes := make([]*structs.SignedBLSToExecutionChange, 0)
 	// Only send half the number of changes each time, to allow us to test
-	// at the fork boundary.
+	// at the fork boundary. When starting from Deneb+ at genesis, there's no
+	// fork boundary to test so we send all changes.
 	wantedChanges := numOfExits / 2
+	if e2etypes.GenesisFork() >= version.Deneb {
+		wantedChanges = numOfExits
+	}
 	for _, idx := range exitedIndices {
 		// Exit sending more change messages.
 		if len(changes) >= wantedChanges {

testing/endtoend/evaluators/validator.go

@@ -26,11 +26,11 @@ import (
 	"google.golang.org/protobuf/types/known/emptypb"
 )
 
-var expectedParticipation = 0.99
+var expectedParticipation = 0.98
 
 var expectedMulticlientParticipation = 0.95
 
-var expectedSyncParticipation = 0.99
+var expectedSyncParticipation = 0.95
 
 // ValidatorsAreActive ensures the expected amount of validators are active.
 var ValidatorsAreActive = types.Evaluator{
@@ -62,6 +62,7 @@ var ValidatorSyncParticipation = types.Evaluator{
 func validatorsAreActive(ec *types.EvaluationContext, conns ...*grpc.ClientConn) error {
 	conn := conns[0]
 	client := ethpb.NewBeaconChainClient(conn)
+
 	// Balances actually fluctuate but we just want to check initial balance.
 	validatorRequest := &ethpb.ListValidatorsRequest{
 		PageSize: int32(params.BeaconConfig().MinGenesisActiveValidatorCount),
@@ -72,17 +73,26 @@ func validatorsAreActive(ec *types.EvaluationContext, conns ...*grpc.ClientConn)
 		return errors.Wrap(err, "failed to get validators")
 	}
 
-	expectedCount := params.BeaconConfig().MinGenesisActiveValidatorCount
+	// Count should be MinGenesisActiveValidatorCount minus any validators that have exited.
+	// We determine actual exited count from the difference, as exits may be submitted but
+	// not yet processed, or affected by churn limits.
 	receivedCount := uint64(len(validators.ValidatorList))
-	if expectedCount != receivedCount {
-		return fmt.Errorf("expected validator count to be %d, received %d", expectedCount, receivedCount)
+	maxExpected := params.BeaconConfig().MinGenesisActiveValidatorCount
+	minExpected := maxExpected - uint64(len(ec.ExitedVals))
+
+	if receivedCount > maxExpected {
+		return fmt.Errorf("validator count %d exceeds genesis count %d", receivedCount, maxExpected)
+	}
+	if receivedCount < minExpected {
+		return fmt.Errorf("validator count %d is less than expected minimum %d (genesis %d - %d submitted exits)",
+			receivedCount, minExpected, maxExpected, len(ec.ExitedVals))
 	}
 
 	effBalanceLowCount := 0
 	exitEpochWrongCount := 0
 	withdrawEpochWrongCount := 0
 	for _, item := range validators.ValidatorList {
-		if ec.ExitedVals[bytesutil.ToBytes48(item.Validator.PublicKey)] {
+		if _, exited := ec.ExitedVals[bytesutil.ToBytes48(item.Validator.PublicKey)]; exited {
 			continue
 		}
 		if item.Validator.EffectiveBalance < params.BeaconConfig().MaxEffectiveBalance {
@@ -262,9 +272,9 @@ func validatorsSyncParticipation(_ *types.EvaluationContext, conns ...*grpc.Clie
 			// Skip fork slot.
 			continue
 		}
-		// Skip slot 1 at genesis - validators need time to ramp up after chain start.
-		// This is a startup timing issue, not a fork transition issue.
-		if b.Block().Slot() == 1 {
+		// Skip slots 1-2 at genesis - validators need time to ramp up after chain start
+		// due to doppelganger protection. This is a startup timing issue, not a fork transition issue.
+		if b.Block().Slot() < 3 {
 			continue
 		}
 		expectedParticipation := expectedSyncParticipation
@@ -300,20 +310,34 @@ func validatorsSyncParticipation(_ *types.EvaluationContext, conns ...*grpc.Clie
 		if b == nil || b.IsNil() {
 			return errors.New("nil block provided")
 		}
-		forkSlot, err := slots.EpochStart(params.BeaconConfig().AltairForkEpoch)
-		if err != nil {
-			return err
+		// Skip evaluation of fork transition slots as sync participation
+		// tends to drop briefly when transitioning between forks.
+		forkEpochs := []primitives.Epoch{
+			params.BeaconConfig().AltairForkEpoch,
+			params.BeaconConfig().BellatrixForkEpoch,
+			params.BeaconConfig().CapellaForkEpoch,
+			params.BeaconConfig().DenebForkEpoch,
+			params.BeaconConfig().ElectraForkEpoch,
+			params.BeaconConfig().FuluForkEpoch,
 		}
-		nexForkSlot, err := slots.EpochStart(params.BeaconConfig().BellatrixForkEpoch)
-		if err != nil {
-			return err
+		skipSlot := false
+		for _, forkEpoch := range forkEpochs {
+			// Skip fork epochs set to far future (not scheduled).
+			if forkEpoch == params.BeaconConfig().FarFutureEpoch {
+				continue
+			}
+			forkSlot, err := slots.EpochStart(forkEpoch)
+			if err != nil {
+				return err
+			}
+			// Skip the first two slots of each fork epoch.
+			if b.Block().Slot() == forkSlot || b.Block().Slot() == forkSlot+1 {
+				skipSlot = true
+				break
+			}
 		}
-		switch b.Block().Slot() {
-		case forkSlot, forkSlot + 1, nexForkSlot:
-			// Skip evaluation of the slot.
+		if skipSlot {
 			continue
-		default:
-			// no-op
 		}
 		syncAgg, err := b.Block().Body().SyncAggregate()
 		if err != nil {
@@ -358,6 +382,14 @@ func syncCompatibleBlockFromCtr(container *ethpb.BeaconBlockContainer) (interfac
 	if container.GetBlindedElectraBlock() != nil {
 		return blocks.NewSignedBeaconBlock(container.GetBlindedElectraBlock())
 	}
+
+	if container.GetFuluBlock() != nil {
+		return blocks.NewSignedBeaconBlock(container.GetFuluBlock())
+	}
+
+	if container.GetBlindedFuluBlock() != nil {
+		return blocks.NewSignedBeaconBlock(container.GetBlindedFuluBlock())
+	}
 	return nil, errors.New("no supported block type in container")
 }
 

testing/endtoend/mainnet_e2e_test.go

@@ -10,7 +10,7 @@ import (
 
 // Run mainnet e2e config with the current release validator against latest beacon node.
 func TestEndToEnd_MainnetConfig_ValidatorAtCurrentRelease(t *testing.T) {
-	r := e2eMainnet(t, true, false, types.InitForkCfg(version.Bellatrix, version.Electra, params.E2EMainnetTestConfig()))
+	r := e2eMainnet(t, true, false, types.InitForkCfg(version.Bellatrix, version.Fulu, params.E2EMainnetTestConfig()))
 	r.run()
 }
 

testing/endtoend/minimal_e2e_test.go

@@ -8,7 +8,38 @@ import (
 	"github.com/OffchainLabs/prysm/v7/testing/endtoend/types"
 )
 
+// TestEndToEnd_MinimalConfig is the pre-submit e2e test from Electra to Fulu
+// with compressed epochs. It runs 10 epochs with exit at epoch 4 (the earliest
+// possible due to ShardCommitteePeriod=4), allowing all evaluators to complete:
+//   - Participation at epoch 2
+//   - Finalization at epoch 3
+//   - Fulu fork transition at epoch 2
+//   - BPO 1 at epoch 3 (15 blobs)
+//   - BPO 2 at epoch 4 (21 blobs)
+//   - Exit proposed at epoch 4
+//   - Exit confirmed at epoch 5
+//   - Withdrawal submitted at epoch 5
+//   - Withdrawal verified at epoch 8 (exit epoch 4 + 1 + MaxSeedLookahead + MinValidatorWithdrawabilityDelay + 1)
 func TestEndToEnd_MinimalConfig(t *testing.T) {
-	r := e2eMinimal(t, types.InitForkCfg(version.Bellatrix, version.Electra, params.E2ETestConfig()), types.WithCheckpointSync())
+	cfg := params.E2ETestConfig()
+	cfg = types.InitForkCfg(version.Electra, version.Fulu, cfg)
+	// Set Fulu fork at epoch 2 for a quick fork transition test
+	cfg.FuluForkEpoch = 2
+	// Update BlobSchedule to use the new FuluForkEpoch for BPO testing
+	cfg.BlobSchedule = []params.BlobScheduleEntry{
+		{Epoch: cfg.DenebForkEpoch, MaxBlobsPerBlock: uint64(cfg.DeprecatedMaxBlobsPerBlock)},
+		{Epoch: cfg.ElectraForkEpoch, MaxBlobsPerBlock: uint64(cfg.DeprecatedMaxBlobsPerBlockElectra)},
+		// BPO (Blob Parameter Optimization) schedule for Fulu
+		{Epoch: cfg.FuluForkEpoch + 1, MaxBlobsPerBlock: 15},
+		{Epoch: cfg.FuluForkEpoch + 2, MaxBlobsPerBlock: 21},
+	}
+	cfg.InitializeForkSchedule()
+
+	r := e2eMinimal(t, cfg,
+		types.WithCheckpointSync(),
+		types.WithEpochs(10),
+		types.WithExitEpoch(4),    // Minimum due to ShardCommitteePeriod=4
+		types.WithLargeBlobs(),    // Use large blob transactions for BPO testing
+	)
 	r.run()
 }

testing/endtoend/minimal_postmerge_e2e_test.go

@@ -0,0 +1,17 @@
+package endtoend
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+	"github.com/OffchainLabs/prysm/v7/testing/endtoend/types"
+)
+
+// TestEndToEnd_MinimalConfig_PostMerge is a post-submit test that runs the full
+// e2e test from Bellatrix (post-merge) through all fork transitions to the latest fork.
+// This test takes longer but provides comprehensive coverage of all forks.
+func TestEndToEnd_MinimalConfig_PostMerge(t *testing.T) {
+	r := e2eMinimal(t, types.InitForkCfg(version.Bellatrix, version.Fulu, params.E2ETestConfig()), types.WithCheckpointSync())
+	r.run()
+}

testing/endtoend/types/types.go

@@ -59,6 +59,15 @@ func WithBuilder() E2EConfigOpt {
 	}
 }
 
+// WithLargeBlobs configures the transaction generator to use large blob
+// transactions (6 blobs per tx) for testing BPO limits. Without this option,
+// small blob transactions (1 blob per tx) are used by default.
+func WithLargeBlobs() E2EConfigOpt {
+	return func(cfg *E2EConfig) {
+		cfg.UseLargeBlobs = true
+	}
+}
+
 func WithSSZOnly() E2EConfigOpt {
 	return func(cfg *E2EConfig) {
 		if err := os.Setenv(params.EnvNameOverrideAccept, api.OctetStreamMediaType); err != nil {
@@ -67,6 +76,14 @@ func WithSSZOnly() E2EConfigOpt {
 	}
 }
 
+// WithExitEpoch sets a custom epoch for voluntary exit submission.
+// This affects ProposeVoluntaryExit, ValidatorsHaveExited, SubmitWithdrawal, and ValidatorsHaveWithdrawn evaluators.
+func WithExitEpoch(e primitives.Epoch) E2EConfigOpt {
+	return func(cfg *E2EConfig) {
+		cfg.ExitEpoch = e
+	}
+}
+
 // E2EConfig defines the struct for all configurations needed for E2E testing.
 type E2EConfig struct {
 	TestCheckpointSync      bool
@@ -81,7 +98,9 @@ type E2EConfig struct {
 	UseValidatorCrossClient bool
 	UseBeaconRestApi        bool
 	UseBuilder              bool
+	UseLargeBlobs           bool // Use large blob transactions (6 blobs per tx) for BPO testing
 	EpochsToRun             uint64
+	ExitEpoch               primitives.Epoch // Custom epoch for voluntary exit submission (0 means use default)
 	Seed                    int64
 	TracingSinkEndpoint     string
 	Evaluators              []Evaluator
@@ -95,6 +114,9 @@ type E2EConfig struct {
 func GenesisFork() int {
 	cfg := params.BeaconConfig()
 	// Check from highest fork to lowest to find the genesis fork.
+	if cfg.FuluForkEpoch == 0 {
+		return version.Fulu
+	}
 	if cfg.ElectraForkEpoch == 0 {
 		return version.Electra
 	}
@@ -146,16 +168,21 @@ type DepositBalancer interface {
 // EvaluationContext allows for additional data to be provided to evaluators that need extra state.
 type EvaluationContext struct {
 	DepositBalancer
-	ExitedVals           map[[48]byte]bool
+	// ExitedVals maps validator pubkey to the epoch when their exit was submitted.
+	// The actual exit takes effect at: submission_epoch + 1 + MaxSeedLookahead
+	ExitedVals           map[[48]byte]primitives.Epoch
 	SeenVotes            map[primitives.Slot][]byte
 	ExpectedEth1DataVote []byte
+	// Eth1DataMismatchCount tracks how many eth1data vote mismatches have been seen
+	// in the current voting period. Some tolerance is allowed for timing differences.
+	Eth1DataMismatchCount int
 }
 
 // NewEvaluationContext handles initializing internal datastructures (like maps) provided by the EvaluationContext.
 func NewEvaluationContext(d DepositBalancer) *EvaluationContext {
 	return &EvaluationContext{
 		DepositBalancer: d,
-		ExitedVals:      make(map[[48]byte]bool),
+		ExitedVals:      make(map[[48]byte]primitives.Epoch),
 		SeenVotes:       make(map[primitives.Slot][]byte),
 	}
 }

testing/middleware/builder/builder.go

@@ -692,14 +692,25 @@ func (p *Builder) handleHeaderRequestElectra(w http.ResponseWriter) {
 }
 
 func (p *Builder) handleBlindedBlock(w http.ResponseWriter, req *http.Request) {
-	// TODO update for fork specific
-	sb := &builderAPI.SignedBlindedBeaconBlockBellatrix{
-		SignedBlindedBeaconBlockBellatrix: &eth.SignedBlindedBeaconBlockBellatrix{},
+	// Decode blinded block based on the current fork version.
+	// The beacon node sends JSON using api/server/structs types.
+	var err error
+	switch p.currVersion {
+	case version.Electra:
+		var sb structs.SignedBlindedBeaconBlockElectra
+		err = json.NewDecoder(req.Body).Decode(&sb)
+	case version.Deneb:
+		var sb structs.SignedBlindedBeaconBlockDeneb
+		err = json.NewDecoder(req.Body).Decode(&sb)
+	case version.Capella:
+		var sb structs.SignedBlindedBeaconBlockCapella
+		err = json.NewDecoder(req.Body).Decode(&sb)
+	default:
+		var sb structs.SignedBlindedBeaconBlockBellatrix
+		err = json.NewDecoder(req.Body).Decode(&sb)
 	}
-	err := json.NewDecoder(req.Body).Decode(sb)
 	if err != nil {
-		p.cfg.logger.WithError(err).Error("Could not decode blinded block")
-		// TODO: Allow the method to unmarshal blinded blocks correctly
+		p.cfg.logger.WithError(err).WithField("version", version.String(p.currVersion)).Error("Could not decode blinded block")
 	}
 	if p.currPayload == nil {
 		p.cfg.logger.Error("No payload is cached")

testing/util/deneb.go

@@ -44,6 +44,13 @@ func WithProposerSigning(idx primitives.ValidatorIndex, sk bls.SecretKey, valRoo
 	}
 }
 
+// WithProposer sets the proposer index for the generated block without signing.
+func WithProposer(idx primitives.ValidatorIndex) DenebBlockGeneratorOption {
+	return func(g *denebBlockGenerator) {
+		g.proposer = idx
+	}
+}
+
 func WithPayloadSetter(p *enginev1.ExecutionPayloadDeneb) DenebBlockGeneratorOption {
 	return func(g *denebBlockGenerator) {
 		g.payload = p

third_party/com_github_consensys_gnark_crypto.patch

@@ -0,0 +1,171 @@
+diff --git a/ecc/bls12-381/fp/BUILD.bazel b/ecc/bls12-381/fp/BUILD.bazel
+index 4d57841..5b1dec4 100644
+--- a/ecc/bls12-381/fp/BUILD.bazel
++++ b/ecc/bls12-381/fp/BUILD.bazel
+@@ -7,15 +7,21 @@ go_library(
+         "arith.go",
+         "doc.go",
+         "element.go",
+-        "element_amd64.go",
+-        "element_amd64.s",
+-        "element_arm64.go",
+-        "element_arm64.s",
+         "element_exp.go",
+         "element_purego.go",
+         "vector.go",
+         "vector_purego.go",
+-    ],
++    ] + select({
++        "@io_bazel_rules_go//go/platform:amd64": [
++          "element_amd64.go",
++          "//field/asm/element_6w:element_6w_amd64"
++        ],
++        "@io_bazel_rules_go//go/platform:arm64": [
++          "element_arm64.go",
++          "//field/asm/element_6w:element_6w_arm64"
++        ],
++        "//conditions:default": [],
++    }),
+     importpath = "github.com/consensys/gnark-crypto/ecc/bls12-381/fp",
+     visibility = ["//visibility:public"],
+     deps = [
+diff --git a/ecc/bls12-381/fr/BUILD.bazel b/ecc/bls12-381/fr/BUILD.bazel
+index e24b29b..6beeb04 100644
+--- a/ecc/bls12-381/fr/BUILD.bazel
++++ b/ecc/bls12-381/fr/BUILD.bazel
+@@ -7,17 +7,24 @@ go_library(
+         "arith.go",
+         "doc.go",
+         "element.go",
+-        "element_amd64.go",
+-        "element_amd64.s",
+-        "element_arm64.go",
+-        "element_arm64.s",
+         "element_exp.go",
+         "element_purego.go",
+         "generator.go",
+         "vector.go",
+-        "vector_amd64.go",
+         "vector_purego.go",
+-    ],
++    ] + select({
++        "@io_bazel_rules_go//go/platform:amd64": [
++          "element_amd64.go",
++          "//field/asm/element_4w:element_4w_amd64",
++          "vector_amd64.go",
++        ],
++        "@io_bazel_rules_go//go/platform:arm64": [
++          "element_arm64.go",
++          "//field/asm/element_4w:element_4w_arm64"
++        ],
++        "//conditions:default": [],
++    }),
++
+     importpath = "github.com/consensys/gnark-crypto/ecc/bls12-381/fr",
+     visibility = ["//visibility:public"],
+     deps = [
+diff --git a/field/asm/element_4w/BUILD.bazel b/field/asm/element_4w/BUILD.bazel
+index ef0882d..975e6f9 100644
+--- a/field/asm/element_4w/BUILD.bazel
++++ b/field/asm/element_4w/BUILD.bazel
+@@ -16,3 +16,15 @@ alias(
+     actual = ":element_4w",
+     visibility = ["//visibility:public"],
+ )
++
++filegroup(
++    name = "element_4w_amd64",
++    srcs = ["element_4w_amd64.s"],
++    visibility = ["//visibility:public"],
++)
++
++filegroup(
++    name = "element_4w_arm64",
++    srcs = ["element_4w_arm64.s"],
++    visibility = ["//visibility:public"],
++)
+diff --git a/field/asm/element_6w/BUILD.bazel b/field/asm/element_6w/BUILD.bazel
+index fbbe81c..fd99a62 100644
+--- a/field/asm/element_6w/BUILD.bazel
++++ b/field/asm/element_6w/BUILD.bazel
+@@ -16,3 +16,15 @@ alias(
+     actual = ":element_6w",
+     visibility = ["//visibility:public"],
+ )
++
++filegroup(
++    name = "element_6w_amd64",
++    srcs = ["element_6w_amd64.s"],
++    visibility = ["//visibility:public"],
++)
++
++filegroup(
++    name = "element_6w_arm64",
++    srcs = ["element_6w_arm64.s"],
++    visibility = ["//visibility:public"],
++)
+diff -urN gnark-patch-a/ecc/bn254/fp/BUILD.bazel gnark-patch-b/ecc/bn254/fp/BUILD.bazel
+--- gnark-patch-a/ecc/bn254/fp/BUILD.bazel	2025-11-19 13:10:39
++++ gnark-patch-b/ecc/bn254/fp/BUILD.bazel	2025-11-19 13:08:50
+@@ -7,16 +7,22 @@
+         "arith.go",
+         "doc.go",
+         "element.go",
+-        "element_amd64.go",
+-        "element_amd64.s",
+-        "element_arm64.go",
+-        "element_arm64.s",
+         "element_exp.go",
+         "element_purego.go",
+         "vector.go",
+-        "vector_amd64.go",
+         "vector_purego.go",
+-    ],
++    ] + select({
++        "@io_bazel_rules_go//go/platform:amd64": [
++            "element_amd64.go",
++            "//field/asm/element_4w:element_4w_amd64",
++            "vector_amd64.go",
++        ],
++        "@io_bazel_rules_go//go/platform:arm64": [
++            "element_arm64.go",
++            "//field/asm/element_4w:element_4w_arm64",
++        ],
++        "//conditions:default": [],
++    }),
+     importpath = "github.com/consensys/gnark-crypto/ecc/bn254/fp",
+     visibility = ["//visibility:public"],
+     deps = [
+diff -urN gnark-patch-a/ecc/bn254/fr/BUILD.bazel gnark-patch-b/ecc/bn254/fr/BUILD.bazel
+--- gnark-patch-a/ecc/bn254/fr/BUILD.bazel	2025-11-19 13:10:39
++++ gnark-patch-b/ecc/bn254/fr/BUILD.bazel	2025-11-19 13:08:55
+@@ -7,17 +7,23 @@
+         "arith.go",
+         "doc.go",
+         "element.go",
+-        "element_amd64.go",
+-        "element_amd64.s",
+-        "element_arm64.go",
+-        "element_arm64.s",
+         "element_exp.go",
+         "element_purego.go",
+         "generator.go",
+         "vector.go",
+-        "vector_amd64.go",
+         "vector_purego.go",
+-    ],
++    ] + select({
++        "@io_bazel_rules_go//go/platform:amd64": [
++            "element_amd64.go",
++            "//field/asm/element_4w:element_4w_amd64",
++            "vector_amd64.go",
++        ],
++        "@io_bazel_rules_go//go/platform:arm64": [
++            "element_arm64.go",
++            "//field/asm/element_4w:element_4w_arm64",
++        ],
++        "//conditions:default": [],
++    }),
+     importpath = "github.com/consensys/gnark-crypto/ecc/bn254/fr",
+     visibility = ["//visibility:public"],
+     deps = [

tools/analyzers/httpwriter/BUILD.bazel

@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = ["analyzer.go"],
-    importpath = "github.com/OffchainLabs/prysm/v7/tools/analyzers/httperror",
+    importpath = "github.com/OffchainLabs/prysm/v7/tools/analyzers/httpwriter",
     visibility = ["//visibility:public"],
     deps = [
         "@org_golang_x_tools//go/analysis:go_default_library",

tools/analyzers/httpwriter/analyzer.go

@@ -1,4 +1,4 @@
-package httperror
+package httpwriter
 
 import (
 	"go/ast"
@@ -9,8 +9,8 @@ import (
 )
 
 var Analyzer = &analysis.Analyzer{
-	Name: "httperror",
-	Doc:  "Ensures calls to httputil.HandleError are immediately followed by a return statement.",
+	Name: "httpwriter",
+	Doc:  "Ensures that httputil functions which make use of the writer are immediately followed by a return statement.",
 	Requires: []*analysis.Analyzer{
 		inspect.Analyzer,
 	},
@@ -99,7 +99,7 @@ func checkBlock(pass *analysis.Pass, fn *ast.FuncDecl, block *ast.BlockStmt, nex
 
 		// Now check the current statement itself: is it (or does it contain) a direct call to httputil.HandleError?
 		// We only consider ExprStmt that are direct CallExpr to httputil.HandleError.
-		call := findHandleErrorCall(stmt)
+		call, name := findHandleErrorCall(stmt)
 		if call == nil {
 			continue
 		}
@@ -121,7 +121,7 @@ func checkBlock(pass *analysis.Pass, fn *ast.FuncDecl, block *ast.BlockStmt, nex
 				continue
 			}
 			// otherwise it's not a return (even if it's an if/for etc) -> violation
-			pass.Reportf(stmt.Pos(), "call to httputil.HandleError must be immediately followed by a return statement")
+			pass.Reportf(stmt.Pos(), "call to httputil.%s must be immediately followed by a return statement", name)
 			continue
 		}
 
@@ -133,31 +133,33 @@ func checkBlock(pass *analysis.Pass, fn *ast.FuncDecl, block *ast.BlockStmt, nex
 		}
 
 		// Non-void function and it's the last statement → violation
-		pass.Reportf(stmt.Pos(), "call to httputil.HandleError must be followed by return because function has return values")
+		pass.Reportf(stmt.Pos(), "call to httputil.%s must be immediately followed by a return statement", name)
 	}
 }
 
 // findHandleErrorCall returns the call expression if stmt is a direct call to httputil.HandleError(...),
 // otherwise nil. We only match direct ExprStmt -> CallExpr -> SelectorExpr where selector is httputil.HandleError.
-func findHandleErrorCall(stmt ast.Stmt) *ast.CallExpr {
+func findHandleErrorCall(stmt ast.Stmt) (*ast.CallExpr, string) {
 	es, ok := stmt.(*ast.ExprStmt)
 	if !ok {
-		return nil
+		return nil, ""
 	}
 	call, ok := es.X.(*ast.CallExpr)
 	if !ok {
-		return nil
+		return nil, ""
 	}
 	sel, ok := call.Fun.(*ast.SelectorExpr)
 	if !ok {
-		return nil
+		return nil, ""
 	}
 	pkgIdent, ok := sel.X.(*ast.Ident)
 	if !ok {
-		return nil
+		return nil, ""
 	}
-	if pkgIdent.Name == "httputil" && sel.Sel.Name == "HandleError" {
-		return call
+	selectorName := sel.Sel.Name
+	if pkgIdent.Name == "httputil" &&
+		(selectorName == "HandleError" || selectorName == "WriteError" || selectorName == "WriteJson" || selectorName == "WriteSSZ") {
+		return call, selectorName
 	}
-	return nil
+	return nil, ""
 }

tools/go/def.bzl

@@ -8,7 +8,7 @@ def _go_test_transition_impl(settings, attr):
 
     if attr.eth_network == "minimal":
         settings["//proto:network"] = "minimal"
-        settings["@io_bazel_rules_go//go/config:tags"] = ["minimal"] + settings["@io_bazel_rules_go//go/config:tags"] 
+        settings["@io_bazel_rules_go//go/config:tags"] = ["minimal"] + settings["@io_bazel_rules_go//go/config:tags"]
     elif attr.eth_network == "mainnet":  # Default / optional
         settings["//proto:network"] = "mainnet"
         settings["@io_bazel_rules_go//go/config:tags"] = ["mainnet"] + settings["@io_bazel_rules_go//go/config:tags"]