saveDataColumnSidecarsExistingFile: Parallelize SSZ encoding of data column sidecars.

If returning before waiting, then the `ctx` used in `processSidecarsFromExecutionFromBlock` is canceled as well, stopping early the blobs retrieval from the EL.

.gitignore

@@ -39,12 +39,6 @@ metaData
 # execution API authentication
 jwt.hex
 
-# local execution client data
-execution/
-
-# local documentation
-CLAUDE.md
-
 # manual testing
 tmp
 

BUILD.bazel

@@ -193,6 +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/interfacechecker:go_default_library",
         "//tools/analyzers/logcapitalization:go_default_library",
         "//tools/analyzers/logruswitherror:go_default_library",

beacon-chain/core/helpers/validators.go

@@ -152,7 +152,7 @@ func ActiveValidatorIndices(ctx context.Context, s state.ReadOnlyBeaconState, ep
 	}
 
 	if err := UpdateCommitteeCache(ctx, s, epoch); err != nil {
-		return nil, errors.Wrap(err, "could not update committee cache")
+		log.WithError(err).Error("Could not update committee cache")
 	}
 
 	return indices, nil

beacon-chain/core/peerdas/metrics.go

@@ -5,10 +5,20 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promauto"
 )
 
-var dataColumnComputationTime = promauto.NewHistogram(
-	prometheus.HistogramOpts{
-		Name:    "beacon_data_column_sidecar_computation_milliseconds",
-		Help:    "Captures the time taken to compute data column sidecars from blobs.",
-		Buckets: []float64{25, 50, 100, 250, 500, 750, 1000},
-	},
+var (
+	dataColumnComputationTime = promauto.NewHistogram(
+		prometheus.HistogramOpts{
+			Name:    "beacon_data_column_sidecar_computation_milliseconds",
+			Help:    "Captures the time taken to compute data column sidecars from blobs.",
+			Buckets: []float64{25, 50, 100, 250, 500, 750, 1000},
+		},
+	)
+
+	cellsAndProofsFromStructuredComputationTime = promauto.NewHistogram(
+		prometheus.HistogramOpts{
+			Name:    "cells_and_proofs_from_structured_computation_milliseconds",
+			Help:    "Captures the time taken to compute cells and proofs from structured computation.",
+			Buckets: []float64{10, 20, 30, 40, 50, 100, 200},
+		},
+	)
 )

beacon-chain/core/peerdas/reconstruction.go

@@ -3,6 +3,7 @@ package peerdas
 import (
 	"sort"
 	"sync"
+	"time"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/blockchain/kzg"
 	fieldparams "github.com/OffchainLabs/prysm/v7/config/fieldparams"
@@ -296,32 +297,42 @@ func ComputeCellsAndProofsFromFlat(blobs [][]byte, cellProofs [][]byte) ([][]kzg
 		return nil, nil, ErrBlobsCellsProofsMismatch
 	}
 
-	cellsPerBlob := make([][]kzg.Cell, 0, blobCount)
-	proofsPerBlob := make([][]kzg.Proof, 0, blobCount)
+	var wg errgroup.Group
+
+	cellsPerBlob := make([][]kzg.Cell, blobCount)
+	proofsPerBlob := make([][]kzg.Proof, blobCount)
+
 	for i, blob := range blobs {
-		var kzgBlob kzg.Blob
-		if copy(kzgBlob[:], blob) != len(kzgBlob) {
-			return nil, nil, errors.New("wrong blob size - should never happen")
-		}
-
-		// Compute the extended cells from the (non-extended) blob.
-		cells, err := kzg.ComputeCells(&kzgBlob)
-		if err != nil {
-			return nil, nil, errors.Wrap(err, "compute cells")
-		}
-
-		var proofs []kzg.Proof
-		for idx := uint64(i) * numberOfColumns; idx < (uint64(i)+1)*numberOfColumns; idx++ {
-			var kzgProof kzg.Proof
-			if copy(kzgProof[:], cellProofs[idx]) != len(kzgProof) {
-				return nil, nil, errors.New("wrong KZG proof size - should never happen")
+		wg.Go(func() error {
+			var kzgBlob kzg.Blob
+			if copy(kzgBlob[:], blob) != len(kzgBlob) {
+				return errors.New("wrong blob size - should never happen")
 			}
 
-			proofs = append(proofs, kzgProof)
-		}
+			// Compute the extended cells from the (non-extended) blob.
+			cells, err := kzg.ComputeCells(&kzgBlob)
+			if err != nil {
+				return errors.Wrap(err, "compute cells")
+			}
 
-		cellsPerBlob = append(cellsPerBlob, cells)
-		proofsPerBlob = append(proofsPerBlob, proofs)
+			proofs := make([]kzg.Proof, 0, numberOfColumns)
+			for idx := uint64(i) * numberOfColumns; idx < (uint64(i)+1)*numberOfColumns; idx++ {
+				var kzgProof kzg.Proof
+				if copy(kzgProof[:], cellProofs[idx]) != len(kzgProof) {
+					return errors.New("wrong KZG proof size - should never happen")
+				}
+
+				proofs = append(proofs, kzgProof)
+			}
+
+			cellsPerBlob[i] = cells
+			proofsPerBlob[i] = proofs
+			return nil
+		})
+	}
+
+	if err := wg.Wait(); err != nil {
+		return nil, nil, err
 	}
 
 	return cellsPerBlob, proofsPerBlob, nil
@@ -329,40 +340,55 @@ func ComputeCellsAndProofsFromFlat(blobs [][]byte, cellProofs [][]byte) ([][]kzg
 
 // ComputeCellsAndProofsFromStructured computes the cells and proofs from blobs and cell proofs.
 func ComputeCellsAndProofsFromStructured(blobsAndProofs []*pb.BlobAndProofV2) ([][]kzg.Cell, [][]kzg.Proof, error) {
-	cellsPerBlob := make([][]kzg.Cell, 0, len(blobsAndProofs))
-	proofsPerBlob := make([][]kzg.Proof, 0, len(blobsAndProofs))
-	for _, blobAndProof := range blobsAndProofs {
+	start := time.Now()
+	defer func() {
+		cellsAndProofsFromStructuredComputationTime.Observe(float64(time.Since(start).Milliseconds()))
+	}()
+
+	var wg errgroup.Group
+
+	cellsPerBlob := make([][]kzg.Cell, len(blobsAndProofs))
+	proofsPerBlob := make([][]kzg.Proof, len(blobsAndProofs))
+
+	for i, blobAndProof := range blobsAndProofs {
 		if blobAndProof == nil {
 			return nil, nil, ErrNilBlobAndProof
 		}
 
-		var kzgBlob kzg.Blob
-		if copy(kzgBlob[:], blobAndProof.Blob) != len(kzgBlob) {
-			return nil, nil, errors.New("wrong blob size - should never happen")
-		}
-
-		// Compute the extended cells from the (non-extended) blob.
-		cells, err := kzg.ComputeCells(&kzgBlob)
-		if err != nil {
-			return nil, nil, errors.Wrap(err, "compute cells")
-		}
-
-		kzgProofs := make([]kzg.Proof, 0, fieldparams.NumberOfColumns)
-		for _, kzgProofBytes := range blobAndProof.KzgProofs {
-			if len(kzgProofBytes) != kzg.BytesPerProof {
-				return nil, nil, errors.New("wrong KZG proof size - should never happen")
+		wg.Go(func() error {
+			var kzgBlob kzg.Blob
+			if copy(kzgBlob[:], blobAndProof.Blob) != len(kzgBlob) {
+				return errors.New("wrong blob size - should never happen")
 			}
 
-			var kzgProof kzg.Proof
-			if copy(kzgProof[:], kzgProofBytes) != len(kzgProof) {
-				return nil, nil, errors.New("wrong copied KZG proof size - should never happen")
+			// Compute the extended cells from the (non-extended) blob.
+			cells, err := kzg.ComputeCells(&kzgBlob)
+			if err != nil {
+				return errors.Wrap(err, "compute cells")
 			}
 
-			kzgProofs = append(kzgProofs, kzgProof)
-		}
+			kzgProofs := make([]kzg.Proof, 0, fieldparams.NumberOfColumns)
+			for _, kzgProofBytes := range blobAndProof.KzgProofs {
+				if len(kzgProofBytes) != kzg.BytesPerProof {
+					return errors.New("wrong KZG proof size - should never happen")
+				}
 
-		cellsPerBlob = append(cellsPerBlob, cells)
-		proofsPerBlob = append(proofsPerBlob, kzgProofs)
+				var kzgProof kzg.Proof
+				if copy(kzgProof[:], kzgProofBytes) != len(kzgProof) {
+					return errors.New("wrong copied KZG proof size - should never happen")
+				}
+
+				kzgProofs = append(kzgProofs, kzgProof)
+			}
+
+			cellsPerBlob[i] = cells
+			proofsPerBlob[i] = kzgProofs
+			return nil
+		})
+	}
+
+	if err := wg.Wait(); err != nil {
+		return nil, nil, err
 	}
 
 	return cellsPerBlob, proofsPerBlob, nil

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 (
@@ -515,6 +516,11 @@ func (dcs *DataColumnStorage) Clear() error {
 
 // prune clean the cache, the filesystem and mutexes.
 func (dcs *DataColumnStorage) prune() {
+	startTime := time.Now()
+	defer func() {
+		dataColumnPruneLatency.Observe(float64(time.Since(startTime).Milliseconds()))
+	}()
+
 	highestStoredEpoch := dcs.cache.HighestEpoch()
 
 	// Check if we need to prune.
@@ -620,7 +626,10 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsExistingFile(filePath string
 	}
 
 	// Create the SSZ encoded data column sidecars.
-	var sszEncodedDataColumnSidecars []byte
+	var sszEncodedDataColumnSidecarsBytes []byte
+
+	// Initialize the count of the saved SSZ encoded data column sidecar.
+	storedCount := uint8(0)
 
 	for {
 		dataColumnSidecars := pullChan(inputDataColumnSidecars)
@@ -628,7 +637,26 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsExistingFile(filePath string
 			break
 		}
 
-		for _, dataColumnSidecar := range dataColumnSidecars {
+		var wg errgroup.Group
+		sszEncodedDataColumnSidecars := make([][]byte, len(dataColumnSidecars))
+		for i, dataColumnSidecar := range dataColumnSidecars {
+			wg.Go(func() error {
+				// SSZ encode the data column sidecar.
+				sszEncodedDataColumnSidecar, err := dataColumnSidecar.MarshalSSZ()
+				if err != nil {
+					return errors.Wrap(err, "data column sidecar marshal SSZ")
+				}
+
+				sszEncodedDataColumnSidecars[i] = sszEncodedDataColumnSidecar
+				return nil
+			})
+		}
+
+		if err := wg.Wait(); err != nil {
+			return err
+		}
+
+		for i, dataColumnSidecar := range dataColumnSidecars {
 			// Extract the data columns index.
 			dataColumnIndex := dataColumnSidecar.Index
 
@@ -650,10 +678,7 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsExistingFile(filePath string
 			}
 
 			// SSZ encode the data column sidecar.
-			sszEncodedDataColumnSidecar, err := dataColumnSidecar.MarshalSSZ()
-			if err != nil {
-				return errors.Wrap(err, "data column sidecar marshal SSZ")
-			}
+			sszEncodedDataColumnSidecar := sszEncodedDataColumnSidecars[i]
 
 			// Compute the size of the SSZ encoded data column sidecar.
 			incomingSszEncodedDataColumnSidecarSize := uint32(len(sszEncodedDataColumnSidecar))
@@ -668,8 +693,11 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsExistingFile(filePath string
 				return errors.Wrap(err, "set index")
 			}
 
+			// Increment the count of the saved SSZ encoded data column sidecar.
+			storedCount++
+
 			// Append the SSZ encoded data column sidecar to the SSZ encoded data column sidecars.
-			sszEncodedDataColumnSidecars = append(sszEncodedDataColumnSidecars, sszEncodedDataColumnSidecar...)
+			sszEncodedDataColumnSidecarsBytes = append(sszEncodedDataColumnSidecarsBytes, sszEncodedDataColumnSidecar...)
 		}
 	}
 
@@ -684,17 +712,20 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsExistingFile(filePath string
 	}
 
 	// Append the SSZ encoded data column sidecars to the end of the file.
-	count, err = file.WriteAt(sszEncodedDataColumnSidecars, metadata.fileSize)
+	count, err = file.WriteAt(sszEncodedDataColumnSidecarsBytes, metadata.fileSize)
 	if err != nil {
 		return errors.Wrap(err, "write SSZ encoded data column sidecars")
 	}
-	if count != len(sszEncodedDataColumnSidecars) {
+	if count != len(sszEncodedDataColumnSidecarsBytes) {
 		return errWrongBytesWritten
 	}
 
+	syncStart := time.Now()
 	if err := file.Sync(); err != nil {
 		return errors.Wrap(err, "sync")
 	}
+	dataColumnFileSyncLatency.Observe(float64(time.Since(syncStart).Milliseconds()))
+	dataColumnBatchStoreCount.Observe(float64(storedCount))
 
 	return nil
 }
@@ -707,7 +738,7 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsNewFile(filePath string, inp
 
 	var (
 		sszEncodedDataColumnSidecarRefSize int
-		sszEncodedDataColumnSidecars       []byte
+		sszEncodedDataColumnSidecarsBytes  []byte
 	)
 
 	// Initialize the count of the saved SSZ encoded data column sidecar.
@@ -719,7 +750,26 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsNewFile(filePath string, inp
 			break
 		}
 
-		for _, dataColumnSidecar := range dataColumnSidecars {
+		var wg errgroup.Group
+		sszEncodedDataColumnSidecars := make([][]byte, len(dataColumnSidecars))
+		for i, dataColumnSidecar := range dataColumnSidecars {
+			wg.Go(func() error {
+				// SSZ encode the first data column sidecar.
+				sszEncodedDataColumnSidecar, err := dataColumnSidecar.MarshalSSZ()
+				if err != nil {
+					return errors.Wrap(err, "data column sidecar marshal SSZ")
+				}
+
+				sszEncodedDataColumnSidecars[i] = sszEncodedDataColumnSidecar
+				return nil
+			})
+		}
+
+		if err := wg.Wait(); err != nil {
+			return err
+		}
+
+		for i, dataColumnSidecar := range dataColumnSidecars {
 			// Extract the data column index.
 			dataColumnIndex := dataColumnSidecar.Index
 
@@ -742,10 +792,7 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsNewFile(filePath string, inp
 			storedCount++
 
 			// SSZ encode the first data column sidecar.
-			sszEncodedDataColumnSidecar, err := dataColumnSidecar.MarshalSSZ()
-			if err != nil {
-				return errors.Wrap(err, "data column sidecar marshal SSZ")
-			}
+			sszEncodedDataColumnSidecar := sszEncodedDataColumnSidecars[i]
 
 			// Check if the size of the SSZ encoded data column sidecar is correct.
 			if sszEncodedDataColumnSidecarRefSize != 0 && len(sszEncodedDataColumnSidecar) != sszEncodedDataColumnSidecarRefSize {
@@ -756,7 +803,7 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsNewFile(filePath string, inp
 			sszEncodedDataColumnSidecarRefSize = len(sszEncodedDataColumnSidecar)
 
 			// Append the first SSZ encoded data column sidecar to the SSZ encoded data column sidecars.
-			sszEncodedDataColumnSidecars = append(sszEncodedDataColumnSidecars, sszEncodedDataColumnSidecar...)
+			sszEncodedDataColumnSidecarsBytes = append(sszEncodedDataColumnSidecarsBytes, sszEncodedDataColumnSidecar...)
 		}
 	}
 
@@ -793,12 +840,12 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsNewFile(filePath string, inp
 	rawIndices := indices.raw()
 
 	// Concatenate the version, the data column sidecar size, the data column indices and the SSZ encoded data column sidecar.
-	countToWrite := headerSize + len(sszEncodedDataColumnSidecars)
+	countToWrite := headerSize + len(sszEncodedDataColumnSidecarsBytes)
 	bytes := make([]byte, 0, countToWrite)
 	bytes = append(bytes, byte(version))
 	bytes = append(bytes, encodedSszEncodedDataColumnSidecarSize[:]...)
 	bytes = append(bytes, rawIndices[:]...)
-	bytes = append(bytes, sszEncodedDataColumnSidecars...)
+	bytes = append(bytes, sszEncodedDataColumnSidecarsBytes...)
 
 	countWritten, err := file.Write(bytes)
 	if err != nil {
@@ -808,10 +855,14 @@ func (dcs *DataColumnStorage) saveDataColumnSidecarsNewFile(filePath string, inp
 		return errWrongBytesWritten
 	}
 
+	syncStart := time.Now()
 	if err := file.Sync(); err != nil {
 		return errors.Wrap(err, "sync")
 	}
 
+	dataColumnFileSyncLatency.Observe(float64(time.Since(syncStart).Milliseconds()))
+	dataColumnBatchStoreCount.Observe(float64(storedCount))
+
 	return nil
 }
 

beacon-chain/db/filesystem/metrics.go

@@ -36,16 +36,15 @@ var (
 	})
 
 	// Data columns
-	dataColumnBuckets     = []float64{3, 5, 7, 9, 11, 13}
 	dataColumnSaveLatency = promauto.NewHistogram(prometheus.HistogramOpts{
 		Name:    "data_column_storage_save_latency",
 		Help:    "Latency of DataColumnSidecar storage save operations in milliseconds",
-		Buckets: dataColumnBuckets,
+		Buckets: []float64{10, 20, 30, 50, 100, 200, 500},
 	})
 	dataColumnFetchLatency = promauto.NewHistogram(prometheus.HistogramOpts{
 		Name:    "data_column_storage_get_latency",
 		Help:    "Latency of DataColumnSidecar storage get operations in milliseconds",
-		Buckets: dataColumnBuckets,
+		Buckets: []float64{3, 5, 7, 9, 11, 13},
 	})
 	dataColumnPrunedCounter = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "data_column_pruned",
@@ -59,4 +58,16 @@ var (
 		Name: "data_column_disk_count",
 		Help: "Approximate number of data columns in storage",
 	})
+	dataColumnFileSyncLatency = promauto.NewSummary(prometheus.SummaryOpts{
+		Name: "data_column_file_sync_latency",
+		Help: "Latency of sync operations when saving data columns in milliseconds",
+	})
+	dataColumnBatchStoreCount = promauto.NewSummary(prometheus.SummaryOpts{
+		Name: "data_column_batch_store_count",
+		Help: "Number of data columns stored in a batch",
+	})
+	dataColumnPruneLatency = promauto.NewSummary(prometheus.SummaryOpts{
+		Name: "data_column_prune_latency",
+		Help: "Latency of data column prune operations in milliseconds",
+	})
 )

beacon-chain/execution/BUILD.bazel

@@ -40,6 +40,7 @@ go_library(
         "//beacon-chain/state/state-native:go_default_library",
         "//beacon-chain/state/stategen:go_default_library",
         "//beacon-chain/verification:go_default_library",
+        "//cmd/beacon-chain/flags:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",

beacon-chain/execution/engine_client.go

@@ -11,6 +11,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/execution/types"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/verification"
+	"github.com/OffchainLabs/prysm/v7/cmd/beacon-chain/flags"
 	fieldparams "github.com/OffchainLabs/prysm/v7/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v7/config/params"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
@@ -532,12 +533,23 @@ func (s *Service) GetBlobsV2(ctx context.Context, versionedHashes []common.Hash)
 	ctx, span := trace.StartSpan(ctx, "powchain.engine-api-client.GetBlobsV2")
 	defer span.End()
 
+	start := time.Now()
+
 	if !s.capabilityCache.has(GetBlobsV2) {
 		return nil, errors.New(fmt.Sprintf("%s is not supported", GetBlobsV2))
 	}
 
+	if flags.Get().DisableGetBlobsV2 {
+		return []*pb.BlobAndProofV2{}, nil
+	}
+
 	result := make([]*pb.BlobAndProofV2, len(versionedHashes))
 	err := s.rpcClient.CallContext(ctx, &result, GetBlobsV2, versionedHashes)
+
+	if len(result) != 0 {
+		getBlobsV2Latency.Observe(float64(time.Since(start).Milliseconds()))
+	}
+
 	return result, handleRPCError(err)
 }
 

beacon-chain/execution/metrics.go

@@ -27,6 +27,13 @@ var (
 			Buckets: []float64{25, 50, 100, 200, 500, 1000, 2000, 4000},
 		},
 	)
+	getBlobsV2Latency = promauto.NewHistogram(
+		prometheus.HistogramOpts{
+			Name:    "get_blobs_v2_latency_milliseconds",
+			Help:    "Captures RPC latency for getBlobsV2 in milliseconds",
+			Buckets: []float64{25, 50, 100, 200, 500, 1000, 2000, 4000},
+		},
+	)
 	errParseCount = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "execution_parse_error_count",
 		Help: "The number of errors that occurred while parsing execution payload",

beacon-chain/node/node.go

@@ -664,7 +664,6 @@ func (b *BeaconNode) registerP2P(cliCtx *cli.Context) error {
 		DenyListCIDR:          slice.SplitCommaSeparated(cliCtx.StringSlice(cmd.P2PDenyList.Name)),
 		IPColocationWhitelist: colocationWhitelist,
 		EnableUPnP:            cliCtx.Bool(cmd.EnableUPnPFlag.Name),
-		EnableAutoNAT:         cliCtx.Bool(cmd.EnableAutoNATFlag.Name),
 		StateNotifier:         b,
 		DB:                    b.db,
 		StateGen:              b.stateGen,

beacon-chain/p2p/BUILD.bazel

@@ -92,7 +92,6 @@ go_library(
         "@com_github_libp2p_go_libp2p//core/connmgr:go_default_library",
         "@com_github_libp2p_go_libp2p//core/control:go_default_library",
         "@com_github_libp2p_go_libp2p//core/crypto:go_default_library",
-        "@com_github_libp2p_go_libp2p//core/event:go_default_library",
         "@com_github_libp2p_go_libp2p//core/host:go_default_library",
         "@com_github_libp2p_go_libp2p//core/network:go_default_library",
         "@com_github_libp2p_go_libp2p//core/peer:go_default_library",
@@ -102,8 +101,10 @@ go_library(
         "@com_github_libp2p_go_libp2p//p2p/security/noise:go_default_library",
         "@com_github_libp2p_go_libp2p//p2p/transport/quic:go_default_library",
         "@com_github_libp2p_go_libp2p//p2p/transport/tcp:go_default_library",
+        "@com_github_libp2p_go_libp2p_mplex//:go_default_library",
         "@com_github_libp2p_go_libp2p_pubsub//:go_default_library",
         "@com_github_libp2p_go_libp2p_pubsub//pb:go_default_library",
+        "@com_github_libp2p_go_mplex//:go_default_library",
         "@com_github_multiformats_go_multiaddr//:go_default_library",
         "@com_github_multiformats_go_multiaddr//net:go_default_library",
         "@com_github_patrickmn_go_cache//:go_default_library",
@@ -193,7 +194,6 @@ go_test(
         "@com_github_libp2p_go_libp2p//:go_default_library",
         "@com_github_libp2p_go_libp2p//core/connmgr:go_default_library",
         "@com_github_libp2p_go_libp2p//core/crypto:go_default_library",
-        "@com_github_libp2p_go_libp2p//core/event:go_default_library",
         "@com_github_libp2p_go_libp2p//core/host:go_default_library",
         "@com_github_libp2p_go_libp2p//core/network:go_default_library",
         "@com_github_libp2p_go_libp2p//core/peer:go_default_library",

beacon-chain/p2p/config.go

@@ -28,7 +28,6 @@ const (
 type Config struct {
 	NoDiscovery           bool
 	EnableUPnP            bool
-	EnableAutoNAT         bool
 	StaticPeerID          bool
 	DisableLivenessCheck  bool
 	StaticPeers           []string

beacon-chain/p2p/options.go

@@ -4,17 +4,20 @@ import (
 	"crypto/ecdsa"
 	"fmt"
 	"net"
+	"time"
 
 	"github.com/OffchainLabs/prysm/v7/config/features"
 	ecdsaprysm "github.com/OffchainLabs/prysm/v7/crypto/ecdsa"
 	"github.com/OffchainLabs/prysm/v7/runtime/version"
 	"github.com/libp2p/go-libp2p"
+	mplex "github.com/libp2p/go-libp2p-mplex"
 	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/libp2p/go-libp2p/p2p/net/connmgr"
 	"github.com/libp2p/go-libp2p/p2p/security/noise"
 	libp2pquic "github.com/libp2p/go-libp2p/p2p/transport/quic"
 	libp2ptcp "github.com/libp2p/go-libp2p/p2p/transport/tcp"
+	gomplex "github.com/libp2p/go-mplex"
 	ma "github.com/multiformats/go-multiaddr"
 	"github.com/pkg/errors"
 )
@@ -107,6 +110,7 @@ func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) ([]libp2p.Op
 		libp2p.ConnectionGater(s),
 		libp2p.Transport(libp2ptcp.NewTCPTransport),
 		libp2p.DefaultMuxers,
+		libp2p.Muxer("/mplex/6.7.0", mplex.DefaultTransport),
 		libp2p.Security(noise.ID, noise.New),
 		libp2p.Ping(false), // Disable Ping Service.
 	}
@@ -158,10 +162,6 @@ func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) ([]libp2p.Op
 		options = append(options, libp2p.ResourceManager(&network.NullResourceManager{}))
 	}
 
-	if cfg.EnableAutoNAT {
-		options = append(options, libp2p.EnableAutoNATv2())
-	}
-
 	return options, nil
 }
 
@@ -217,3 +217,8 @@ func privKeyOption(privkey *ecdsa.PrivateKey) libp2p.Option {
 		return cfg.Apply(libp2p.Identity(ifaceKey))
 	}
 }
+
+// Configures stream timeouts on mplex.
+func configureMplex() {
+	gomplex.ResetStreamTimeout = 5 * time.Second
+}

beacon-chain/p2p/options_test.go

@@ -132,6 +132,7 @@ func TestDefaultMultiplexers(t *testing.T) {
 	assert.NoError(t, err)
 
 	assert.Equal(t, protocol.ID("/yamux/1.0.0"), cfg.Muxers[0].ID)
+	assert.Equal(t, protocol.ID("/mplex/6.7.0"), cfg.Muxers[1].ID)
 }
 
 func TestSetConnManagerOption(t *testing.T) {
@@ -187,30 +188,6 @@ func checkLimit(t *testing.T, cm connmgr.ConnManager, expected int) {
 	}
 }
 
-func TestBuildOptions_EnableAutoNAT(t *testing.T) {
-	params.SetupTestConfigCleanup(t)
-	p2pCfg := &Config{
-		UDPPort:       2000,
-		TCPPort:       3000,
-		QUICPort:      3000,
-		EnableAutoNAT: true,
-		StateNotifier: &mock.MockStateNotifier{},
-	}
-	svc := &Service{cfg: p2pCfg}
-	var err error
-	svc.privKey, err = privKey(svc.cfg)
-	require.NoError(t, err)
-	ipAddr := network.IPAddr()
-	opts, err := svc.buildOptions(ipAddr, svc.privKey)
-	require.NoError(t, err)
-
-	// Verify that options were built without error when EnableAutoNAT is true.
-	// The actual AutoNAT v2 behavior is tested by libp2p itself.
-	var cfg libp2p.Config
-	err = cfg.Apply(append(opts, libp2p.FallbackDefaults)...)
-	assert.NoError(t, err)
-}
-
 func TestMultiAddressBuilderWithID(t *testing.T) {
 	testCases := []struct {
 		name     string

beacon-chain/p2p/peers/status_test.go

@@ -58,7 +58,7 @@ func TestPeerExplicitAdd(t *testing.T) {
 
 	resAddress, err := p.Address(id)
 	require.NoError(t, err)
-	assert.Equal(t, address.Equal(resAddress), true, "Unexpected address")
+	assert.Equal(t, address, resAddress, "Unexpected address")
 
 	resDirection, err := p.Direction(id)
 	require.NoError(t, err)
@@ -72,7 +72,7 @@ func TestPeerExplicitAdd(t *testing.T) {
 
 	resAddress2, err := p.Address(id)
 	require.NoError(t, err)
-	assert.Equal(t, address2.Equal(resAddress2), true, "Unexpected address")
+	assert.Equal(t, address2, resAddress2, "Unexpected address")
 
 	resDirection2, err := p.Direction(id)
 	require.NoError(t, err)

beacon-chain/p2p/service.go

@@ -6,7 +6,6 @@ package p2p
 import (
 	"context"
 	"crypto/ecdsa"
-	"fmt"
 	"sync"
 	"time"
 
@@ -29,7 +28,6 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/libp2p/go-libp2p"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
-	"github.com/libp2p/go-libp2p/core/event"
 	"github.com/libp2p/go-libp2p/core/host"
 	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/peer"
@@ -156,6 +154,8 @@ func NewService(ctx context.Context, cfg *Config) (*Service, error) {
 		return nil, errors.Wrapf(err, "failed to build p2p options")
 	}
 
+	// Sets mplex timeouts
+	configureMplex()
 	h, err := libp2p.New(opts...)
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to create p2p host")
@@ -259,14 +259,6 @@ func (s *Service) Start() {
 	// current epoch.
 	s.RefreshPersistentSubnets()
 
-	if s.cfg.EnableAutoNAT {
-		if err := s.subscribeReachabilityEvents(); err != nil {
-			log.WithError(err).Error("Failed to subscribe to AutoNAT v2 reachability events")
-		} else {
-			log.Info("AutoNAT v2 enabled for address reachability detection")
-		}
-	}
-
 	// Periodic functions.
 	async.RunEvery(s.ctx, params.BeaconConfig().TtfbTimeoutDuration(), func() {
 		ensurePeerConnections(s.ctx, s.host, s.peers, relayNodes...)
@@ -565,41 +557,3 @@ func (s *Service) downscorePeer(peerID peer.ID, reason string) {
 	newScore := s.Peers().Scorers().BadResponsesScorer().Increment(peerID)
 	log.WithFields(logrus.Fields{"peerID": peerID, "reason": reason, "newScore": newScore}).Debug("Downscore peer")
 }
-
-func (s *Service) subscribeReachabilityEvents() error {
-	sub, err := s.host.EventBus().Subscribe(new(event.EvtHostReachableAddrsChanged))
-	if err != nil {
-		return fmt.Errorf("subscribing to reachability events: %w", err)
-	}
-
-	go func() {
-		defer func() {
-			if err := sub.Close(); err != nil {
-				log.WithError(err).Debug("Failed to close reachability event subscription")
-			}
-		}()
-		for {
-			select {
-			case <-s.ctx.Done():
-				return
-			case ev := <-sub.Out():
-				if event, ok := ev.(event.EvtHostReachableAddrsChanged); ok {
-					log.WithFields(logrus.Fields{
-						"reachable":   multiaddrsToStrings(event.Reachable),
-						"unreachable": multiaddrsToStrings(event.Unreachable),
-						"unknown":     multiaddrsToStrings(event.Unknown),
-					}).Info("Address reachability changed")
-				}
-			}
-		}
-	}()
-	return nil
-}
-
-func multiaddrsToStrings(addrs []multiaddr.Multiaddr) []string {
-	strs := make([]string, len(addrs))
-	for i, a := range addrs {
-		strs[i] = a.String()
-	}
-	return strs
-}

beacon-chain/p2p/service_test.go

@@ -21,7 +21,6 @@ import (
 	"github.com/OffchainLabs/prysm/v7/testing/require"
 	prysmTime "github.com/OffchainLabs/prysm/v7/time"
 	"github.com/libp2p/go-libp2p"
-	"github.com/libp2p/go-libp2p/core/event"
 	"github.com/libp2p/go-libp2p/core/host"
 	"github.com/libp2p/go-libp2p/core/peer"
 	noise "github.com/libp2p/go-libp2p/p2p/security/noise"
@@ -401,58 +400,3 @@ func TestService_connectWithPeer(t *testing.T) {
 		})
 	}
 }
-
-func TestService_SubscribeReachabilityEvents(t *testing.T) {
-	hook := logTest.NewGlobal()
-	ctx := t.Context()
-
-	h, _, _ := createHost(t, 0)
-	defer func() {
-		if err := h.Close(); err != nil {
-			t.Fatal(err)
-		}
-	}()
-
-	// Create service with the host
-	s := &Service{
-		ctx:  ctx,
-		host: h,
-		cfg:  &Config{EnableAutoNAT: true},
-	}
-
-	// Get an emitter for the reachability event
-	emitter, err := h.EventBus().Emitter(new(event.EvtHostReachableAddrsChanged))
-	require.NoError(t, err)
-	defer func() {
-		if err := emitter.Close(); err != nil {
-			t.Fatal(err)
-		}
-	}()
-	// Subscribe to reachability events
-	require.NoError(t, s.subscribeReachabilityEvents())
-
-	// Create test multiaddrs for each reachability state
-	reachableAddr, err := multiaddr.NewMultiaddr("/ip4/192.168.1.1/tcp/9000")
-	require.NoError(t, err)
-	unreachableAddr, err := multiaddr.NewMultiaddr("/ip4/10.0.0.1/tcp/9001")
-	require.NoError(t, err)
-	unknownAddr, err := multiaddr.NewMultiaddr("/ip4/172.16.0.1/tcp/9002")
-	require.NoError(t, err)
-
-	// Emit a reachability event with all address types
-	err = emitter.Emit(event.EvtHostReachableAddrsChanged{
-		Reachable:   []multiaddr.Multiaddr{reachableAddr},
-		Unreachable: []multiaddr.Multiaddr{unreachableAddr},
-		Unknown:     []multiaddr.Multiaddr{unknownAddr},
-	})
-	require.NoError(t, err)
-
-	// Wait for the event to be processed
-	time.Sleep(100 * time.Millisecond)
-
-	// Verify the log message contains all addresses
-	require.LogsContain(t, hook, "Address reachability changed")
-	require.LogsContain(t, hook, "/ip4/192.168.1.1/tcp/9000")
-	require.LogsContain(t, hook, "/ip4/10.0.0.1/tcp/9001")
-	require.LogsContain(t, hook, "/ip4/172.16.0.1/tcp/9002")
-}

beacon-chain/p2p/types/object_mapping.go

@@ -204,6 +204,9 @@ func InitializeDataMaps() {
 		bytesutil.ToBytes4(params.BeaconConfig().ElectraForkVersion): func() (interfaces.LightClientOptimisticUpdate, error) {
 			return lightclientConsensusTypes.NewEmptyOptimisticUpdateDeneb(), nil
 		},
+		bytesutil.ToBytes4(params.BeaconConfig().FuluForkVersion): func() (interfaces.LightClientOptimisticUpdate, error) {
+			return lightclientConsensusTypes.NewEmptyOptimisticUpdateDeneb(), nil
+		},
 	}
 
 	// Reset our light client finality update map.
@@ -223,5 +226,8 @@ func InitializeDataMaps() {
 		bytesutil.ToBytes4(params.BeaconConfig().ElectraForkVersion): func() (interfaces.LightClientFinalityUpdate, error) {
 			return lightclientConsensusTypes.NewEmptyFinalityUpdateElectra(), nil
 		},
+		bytesutil.ToBytes4(params.BeaconConfig().FuluForkVersion): func() (interfaces.LightClientFinalityUpdate, error) {
+			return lightclientConsensusTypes.NewEmptyFinalityUpdateElectra(), nil
+		},
 	}
 }

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

@@ -130,6 +130,10 @@ func (s *Server) SubmitAttestationsV2(w http.ResponseWriter, r *http.Request) {
 	ctx, span := trace.StartSpan(r.Context(), "beacon.SubmitAttestationsV2")
 	defer span.End()
 
+	if shared.IsSyncing(ctx, w, s.SyncChecker, s.HeadFetcher, s.TimeFetcher, s.OptimisticModeFetcher) {
+		return
+	}
+
 	versionHeader := r.Header.Get(api.VersionHeader)
 	if versionHeader == "" {
 		httputil.HandleError(w, api.VersionHeader+" header is required", http.StatusBadRequest)
@@ -238,22 +242,14 @@ func (s *Server) handleAttestationsElectra(
 			},
 		})
 
-		targetState, err := s.AttestationStateFetcher.AttestationTargetState(ctx, singleAtt.Data.Target)
-		if err != nil {
-			return nil, nil, errors.Wrap(err, "could not get target state for attestation")
-		}
-		committee, err := corehelpers.BeaconCommitteeFromState(ctx, targetState, singleAtt.Data.Slot, singleAtt.CommitteeId)
-		if err != nil {
-			return nil, nil, errors.Wrap(err, "could not get committee for attestation")
-		}
-		att := singleAtt.ToAttestationElectra(committee)
-
-		wantedEpoch := slots.ToEpoch(att.Data.Slot)
+		// Broadcast first using CommitteeId directly (fast path)
+		// This matches gRPC behavior and avoids blocking on state fetching
+		wantedEpoch := slots.ToEpoch(singleAtt.Data.Slot)
 		vals, err := s.HeadFetcher.HeadValidatorsIndices(ctx, wantedEpoch)
 		if err != nil {
 			return nil, nil, errors.Wrap(err, "could not get head validator indices")
 		}
-		subnet := corehelpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), att.GetCommitteeIndex(), att.Data.Slot)
+		subnet := corehelpers.ComputeSubnetFromCommitteeAndSlot(uint64(len(vals)), singleAtt.CommitteeId, singleAtt.Data.Slot)
 		if err = s.Broadcaster.BroadcastAttestation(ctx, subnet, singleAtt); err != nil {
 			failedBroadcasts = append(failedBroadcasts, &server.IndexedError{
 				Index:   i,
@@ -264,17 +260,35 @@ func (s *Server) handleAttestationsElectra(
 			}
 			continue
 		}
+	}
 
-		if features.Get().EnableExperimentalAttestationPool {
-			if err = s.AttestationCache.Add(att); err != nil {
-				log.WithError(err).Error("Could not save attestation")
+	// Save to pool after broadcast (slow path - requires state fetching)
+	// Run in goroutine to avoid blocking the HTTP response
+	go func() {
+		for _, singleAtt := range validAttestations {
+			targetState, err := s.AttestationStateFetcher.AttestationTargetState(context.Background(), singleAtt.Data.Target)
+			if err != nil {
+				log.WithError(err).Error("Could not get target state for attestation")
+				continue
 			}
-		} else {
-			if err = s.AttestationsPool.SaveUnaggregatedAttestation(att); err != nil {
-				log.WithError(err).Error("Could not save attestation")
+			committee, err := corehelpers.BeaconCommitteeFromState(context.Background(), targetState, singleAtt.Data.Slot, singleAtt.CommitteeId)
+			if err != nil {
+				log.WithError(err).Error("Could not get committee for attestation")
+				continue
+			}
+			att := singleAtt.ToAttestationElectra(committee)
+
+			if features.Get().EnableExperimentalAttestationPool {
+				if err = s.AttestationCache.Add(att); err != nil {
+					log.WithError(err).Error("Could not save attestation")
+				}
+			} else {
+				if err = s.AttestationsPool.SaveUnaggregatedAttestation(att); err != nil {
+					log.WithError(err).Error("Could not save attestation")
+				}
 			}
 		}
-	}
+	}()
 
 	if len(failedBroadcasts) > 0 {
 		log.WithFields(logrus.Fields{
@@ -470,6 +484,10 @@ func (s *Server) SubmitSyncCommitteeSignatures(w http.ResponseWriter, r *http.Re
 	ctx, span := trace.StartSpan(r.Context(), "beacon.SubmitPoolSyncCommitteeSignatures")
 	defer span.End()
 
+	if shared.IsSyncing(ctx, w, s.SyncChecker, s.HeadFetcher, s.TimeFetcher, s.OptimisticModeFetcher) {
+		return
+	}
+
 	var req structs.SubmitSyncCommitteeSignaturesRequest
 	err := json.NewDecoder(r.Body).Decode(&req.Data)
 	switch {
@@ -711,6 +729,7 @@ func (s *Server) SubmitAttesterSlashingsV2(w http.ResponseWriter, r *http.Reques
 	versionHeader := r.Header.Get(api.VersionHeader)
 	if versionHeader == "" {
 		httputil.HandleError(w, api.VersionHeader+" header is required", http.StatusBadRequest)
+		return
 	}
 	v, err := version.FromString(versionHeader)
 	if err != nil {

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

@@ -26,6 +26,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/operations/voluntaryexits/mock"
 	p2pMock "github.com/OffchainLabs/prysm/v7/beacon-chain/p2p/testing"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/rpc/core"
+	mockSync "github.com/OffchainLabs/prysm/v7/beacon-chain/sync/initial-sync/testing"
 	state_native "github.com/OffchainLabs/prysm/v7/beacon-chain/state/state-native"
 	"github.com/OffchainLabs/prysm/v7/config/params"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
@@ -622,6 +623,8 @@ func TestSubmitAttestationsV2(t *testing.T) {
 		HeadFetcher:             chainService,
 		ChainInfoFetcher:        chainService,
 		TimeFetcher:             chainService,
+		OptimisticModeFetcher:   chainService,
+		SyncChecker:             &mockSync.Sync{IsSyncing: false},
 		OperationNotifier:       &blockchainmock.MockOperationNotifier{},
 		AttestationStateFetcher: chainService,
 	}
@@ -654,6 +657,7 @@ func TestSubmitAttestationsV2(t *testing.T) {
 			assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Source.Epoch)
 			assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Target.Root))
 			assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Target.Epoch)
+			time.Sleep(100 * time.Millisecond) // Wait for async pool save
 			assert.Equal(t, 1, s.AttestationsPool.UnaggregatedAttestationCount())
 		})
 		t.Run("multiple", func(t *testing.T) {
@@ -673,6 +677,7 @@ func TestSubmitAttestationsV2(t *testing.T) {
 			assert.Equal(t, http.StatusOK, writer.Code)
 			assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
 			assert.Equal(t, 2, broadcaster.NumAttestations())
+			time.Sleep(100 * time.Millisecond) // Wait for async pool save
 			assert.Equal(t, 2, s.AttestationsPool.UnaggregatedAttestationCount())
 		})
 		t.Run("phase0 att post electra", func(t *testing.T) {
@@ -793,6 +798,7 @@ func TestSubmitAttestationsV2(t *testing.T) {
 			assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Source.Epoch)
 			assert.Equal(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2", hexutil.Encode(broadcaster.BroadcastAttestations[0].GetData().Target.Root))
 			assert.Equal(t, primitives.Epoch(0), broadcaster.BroadcastAttestations[0].GetData().Target.Epoch)
+			time.Sleep(100 * time.Millisecond) // Wait for async pool save
 			assert.Equal(t, 1, s.AttestationsPool.UnaggregatedAttestationCount())
 		})
 		t.Run("multiple", func(t *testing.T) {
@@ -812,6 +818,7 @@ func TestSubmitAttestationsV2(t *testing.T) {
 			assert.Equal(t, http.StatusOK, writer.Code)
 			assert.Equal(t, true, broadcaster.BroadcastCalled.Load())
 			assert.Equal(t, 2, broadcaster.NumAttestations())
+			time.Sleep(100 * time.Millisecond) // Wait for async pool save
 			assert.Equal(t, 2, s.AttestationsPool.UnaggregatedAttestationCount())
 		})
 		t.Run("no body", func(t *testing.T) {
@@ -861,6 +868,27 @@ func TestSubmitAttestationsV2(t *testing.T) {
 			assert.Equal(t, true, strings.Contains(e.Failures[0].Message, "Incorrect attestation signature"))
 		})
 	})
+	t.Run("syncing", func(t *testing.T) {
+		chainService := &blockchainmock.ChainService{}
+		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: true},
+		}
+
+		var body bytes.Buffer
+		_, err := body.WriteString(singleAtt)
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+		request.Header.Set(api.VersionHeader, version.String(version.Phase0))
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.SubmitAttestationsV2(writer, request)
+		assert.Equal(t, http.StatusServiceUnavailable, writer.Code)
+		assert.Equal(t, true, strings.Contains(writer.Body.String(), "Beacon node is currently syncing"))
+	})
 }
 
 func TestListVoluntaryExits(t *testing.T) {
@@ -1057,14 +1085,19 @@ func TestSubmitSyncCommitteeSignatures(t *testing.T) {
 
 	t.Run("single", func(t *testing.T) {
 		broadcaster := &p2pMock.MockBroadcaster{}
+		chainService := &blockchainmock.ChainService{
+			State:                st,
+			SyncCommitteeIndices: []primitives.CommitteeIndex{0},
+		}
 		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
 			CoreService: &core.Service{
 				SyncCommitteePool: synccommittee.NewStore(),
 				P2P:               broadcaster,
-				HeadFetcher: &blockchainmock.ChainService{
-					State:                st,
-					SyncCommitteeIndices: []primitives.CommitteeIndex{0},
-				},
+				HeadFetcher:       chainService,
 			},
 		}
 
@@ -1089,14 +1122,19 @@ func TestSubmitSyncCommitteeSignatures(t *testing.T) {
 	})
 	t.Run("multiple", func(t *testing.T) {
 		broadcaster := &p2pMock.MockBroadcaster{}
+		chainService := &blockchainmock.ChainService{
+			State:                st,
+			SyncCommitteeIndices: []primitives.CommitteeIndex{0},
+		}
 		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
 			CoreService: &core.Service{
 				SyncCommitteePool: synccommittee.NewStore(),
 				P2P:               broadcaster,
-				HeadFetcher: &blockchainmock.ChainService{
-					State:                st,
-					SyncCommitteeIndices: []primitives.CommitteeIndex{0},
-				},
+				HeadFetcher:       chainService,
 			},
 		}
 
@@ -1120,13 +1158,18 @@ func TestSubmitSyncCommitteeSignatures(t *testing.T) {
 	})
 	t.Run("invalid", func(t *testing.T) {
 		broadcaster := &p2pMock.MockBroadcaster{}
+		chainService := &blockchainmock.ChainService{
+			State: st,
+		}
 		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
 			CoreService: &core.Service{
 				SyncCommitteePool: synccommittee.NewStore(),
 				P2P:               broadcaster,
-				HeadFetcher: &blockchainmock.ChainService{
-					State: st,
-				},
+				HeadFetcher:       chainService,
 			},
 		}
 
@@ -1149,7 +1192,13 @@ func TestSubmitSyncCommitteeSignatures(t *testing.T) {
 		assert.Equal(t, false, broadcaster.BroadcastCalled.Load())
 	})
 	t.Run("empty", func(t *testing.T) {
-		s := &Server{}
+		chainService := &blockchainmock.ChainService{State: st}
+		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+		}
 
 		var body bytes.Buffer
 		_, err := body.WriteString("[]")
@@ -1166,7 +1215,13 @@ func TestSubmitSyncCommitteeSignatures(t *testing.T) {
 		assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
 	})
 	t.Run("no body", func(t *testing.T) {
-		s := &Server{}
+		chainService := &blockchainmock.ChainService{State: st}
+		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+		}
 
 		request := httptest.NewRequest(http.MethodPost, "http://example.com", nil)
 		writer := httptest.NewRecorder()
@@ -1179,6 +1234,26 @@ func TestSubmitSyncCommitteeSignatures(t *testing.T) {
 		assert.Equal(t, http.StatusBadRequest, e.Code)
 		assert.Equal(t, true, strings.Contains(e.Message, "No data submitted"))
 	})
+	t.Run("syncing", func(t *testing.T) {
+		chainService := &blockchainmock.ChainService{State: st}
+		s := &Server{
+			HeadFetcher:           chainService,
+			TimeFetcher:           chainService,
+			OptimisticModeFetcher: chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: true},
+		}
+
+		var body bytes.Buffer
+		_, err := body.WriteString(singleSyncCommitteeMsg)
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodPost, "http://example.com", &body)
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.SubmitSyncCommitteeSignatures(writer, request)
+		assert.Equal(t, http.StatusServiceUnavailable, writer.Code)
+		assert.Equal(t, true, strings.Contains(writer.Body.String(), "Beacon node is currently syncing"))
+	})
 }
 
 func TestListBLSToExecutionChanges(t *testing.T) {
@@ -2112,6 +2187,33 @@ func TestSubmitAttesterSlashingsV2(t *testing.T) {
 		assert.Equal(t, http.StatusBadRequest, e.Code)
 		assert.StringContains(t, "Invalid attester slashing", e.Message)
 	})
+
+	t.Run("missing-version-header", func(t *testing.T) {
+		bs, err := util.NewBeaconStateElectra()
+		require.NoError(t, err)
+
+		broadcaster := &p2pMock.MockBroadcaster{}
+		s := &Server{
+			ChainInfoFetcher: &blockchainmock.ChainService{State: bs},
+			SlashingsPool:    &slashingsmock.PoolMock{},
+			Broadcaster:      broadcaster,
+		}
+
+		var body bytes.Buffer
+		_, err = body.WriteString(invalidAttesterSlashing)
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodPost, "http://example.com/beacon/pool/attester_slashings", &body)
+		// Intentionally do not set api.VersionHeader to verify missing header handling.
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.SubmitAttesterSlashingsV2(writer, request)
+		require.Equal(t, http.StatusBadRequest, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusBadRequest, e.Code)
+		assert.StringContains(t, api.VersionHeader+" header is required", e.Message)
+	})
 }
 
 func TestSubmitProposerSlashing_InvalidSlashing(t *testing.T) {

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

@@ -654,6 +654,10 @@ func (m *futureSyncMockFetcher) StateBySlot(context.Context, primitives.Slot) (s
 	return m.BeaconState, nil
 }
 
+func (m *futureSyncMockFetcher) StateByEpoch(context.Context, primitives.Epoch) (state.BeaconState, error) {
+	return m.BeaconState, nil
+}
+
 func TestGetSyncCommittees_Future(t *testing.T) {
 	st, _ := util.DeterministicGenesisStateAltair(t, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := make([][]byte, params.BeaconConfig().SyncCommitteeSize)

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

@@ -116,6 +116,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 		for _, update := range updates {
 			if ctx.Err() != nil {
 				httputil.HandleError(w, "Context error: "+ctx.Err().Error(), http.StatusInternalServerError)
+				return
 			}
 
 			updateSlot := update.AttestedHeader().Beacon().Slot
@@ -131,12 +132,15 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 			chunkLength = ssz.MarshalUint64(chunkLength, uint64(len(updateSSZ)+4))
 			if _, err := w.Write(chunkLength); err != nil {
 				httputil.HandleError(w, "Could not write chunk length: "+err.Error(), http.StatusInternalServerError)
+				return
 			}
 			if _, err := w.Write(updateEntry.ForkDigest[:]); err != nil {
 				httputil.HandleError(w, "Could not write fork digest: "+err.Error(), http.StatusInternalServerError)
+				return
 			}
 			if _, err := w.Write(updateSSZ); err != nil {
 				httputil.HandleError(w, "Could not write update SSZ: "+err.Error(), http.StatusInternalServerError)
+				return
 			}
 		}
 	} else {
@@ -145,6 +149,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 		for _, update := range updates {
 			if ctx.Err() != nil {
 				httputil.HandleError(w, "Context error: "+ctx.Err().Error(), http.StatusInternalServerError)
+				return
 			}
 
 			updateJson, err := structs.LightClientUpdateFromConsensus(update)

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

@@ -132,6 +132,7 @@ func (s *Server) GetHealth(w http.ResponseWriter, r *http.Request) {
 	optimistic, err := s.OptimisticModeFetcher.IsOptimistic(ctx)
 	if err != nil {
 		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		return
 	}
 	if s.SyncChecker.Synced() && !optimistic {
 		return

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

@@ -228,7 +228,7 @@ func (s *Server) attRewardsState(w http.ResponseWriter, r *http.Request) (state.
 	}
 	st, err := s.Stater.StateBySlot(r.Context(), nextEpochEnd)
 	if err != nil {
-		httputil.HandleError(w, "Could not get state for epoch's starting slot: "+err.Error(), http.StatusInternalServerError)
+		shared.WriteStateFetchError(w, err)
 		return nil, false
 	}
 	return st, true

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

@@ -19,7 +19,6 @@ go_library(
         "//beacon-chain/cache:go_default_library",
         "//beacon-chain/core/feed/operation:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
-        "//beacon-chain/core/transition:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/operations/attestations:go_default_library",
         "//beacon-chain/operations/synccommittee:go_default_library",
@@ -78,6 +77,7 @@ go_test(
         "//beacon-chain/rpc/core:go_default_library",
         "//beacon-chain/rpc/eth/rewards/testing:go_default_library",
         "//beacon-chain/rpc/eth/shared/testing:go_default_library",
+        "//beacon-chain/rpc/lookup:go_default_library",
         "//beacon-chain/rpc/testutil:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/stategen:go_default_library",

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

@@ -19,7 +19,6 @@ import (
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/builder"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/cache"
 	"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/rpc/core"
 	rpchelpers "github.com/OffchainLabs/prysm/v7/beacon-chain/rpc/eth/helpers"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/rpc/eth/shared"
@@ -898,20 +897,15 @@ func (s *Server) GetAttesterDuties(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	var startSlot primitives.Slot
+	// For next epoch requests, we use the current epoch's state since committee
+	// assignments for next epoch can be computed from current epoch's state.
+	epochForState := requestedEpoch
 	if requestedEpoch == nextEpoch {
-		startSlot, err = slots.EpochStart(currentEpoch)
-	} else {
-		startSlot, err = slots.EpochStart(requestedEpoch)
+		epochForState = currentEpoch
 	}
+	st, err := s.Stater.StateByEpoch(ctx, epochForState)
 	if err != nil {
-		httputil.HandleError(w, fmt.Sprintf("Could not get start slot from epoch %d: %v", requestedEpoch, err), http.StatusInternalServerError)
-		return
-	}
-
-	st, err := s.Stater.StateBySlot(ctx, startSlot)
-	if err != nil {
-		httputil.HandleError(w, "Could not get state: "+err.Error(), http.StatusInternalServerError)
+		shared.WriteStateFetchError(w, err)
 		return
 	}
 
@@ -1020,39 +1014,11 @@ func (s *Server) GetProposerDuties(w http.ResponseWriter, r *http.Request) {
 		nextEpochLookahead = true
 	}
 
-	epochStartSlot, err := slots.EpochStart(requestedEpoch)
+	st, err := s.Stater.StateByEpoch(ctx, requestedEpoch)
 	if err != nil {
-		httputil.HandleError(w, fmt.Sprintf("Could not get start slot of epoch %d: %v", requestedEpoch, err), http.StatusInternalServerError)
+		shared.WriteStateFetchError(w, err)
 		return
 	}
-	var st state.BeaconState
-	// if the requested epoch is new, use the head state and the next slot cache
-	if requestedEpoch < currentEpoch {
-		st, err = s.Stater.StateBySlot(ctx, epochStartSlot)
-		if err != nil {
-			httputil.HandleError(w, fmt.Sprintf("Could not get state for slot %d: %v ", epochStartSlot, err), http.StatusInternalServerError)
-			return
-		}
-	} else {
-		st, err = s.HeadFetcher.HeadState(ctx)
-		if err != nil {
-			httputil.HandleError(w, fmt.Sprintf("Could not get head state: %v ", err), http.StatusInternalServerError)
-			return
-		}
-		// Notice that even for Fulu requests for the next epoch, we are only advancing the state to the start of the current epoch.
-		if st.Slot() < epochStartSlot {
-			headRoot, err := s.HeadFetcher.HeadRoot(ctx)
-			if err != nil {
-				httputil.HandleError(w, fmt.Sprintf("Could not get head root: %v ", err), http.StatusInternalServerError)
-				return
-			}
-			st, err = transition.ProcessSlotsUsingNextSlotCache(ctx, st, headRoot, epochStartSlot)
-			if err != nil {
-				httputil.HandleError(w, fmt.Sprintf("Could not process slots up to %d: %v ", epochStartSlot, err), http.StatusInternalServerError)
-				return
-			}
-		}
-	}
 
 	var assignments map[primitives.ValidatorIndex][]primitives.Slot
 	if nextEpochLookahead {
@@ -1103,7 +1069,8 @@ func (s *Server) GetProposerDuties(w http.ResponseWriter, r *http.Request) {
 		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
-	if !sortProposerDuties(w, duties) {
+	if err = sortProposerDuties(duties); err != nil {
+		httputil.HandleError(w, "Could not sort proposer duties: "+err.Error(), http.StatusInternalServerError)
 		return
 	}
 
@@ -1174,14 +1141,10 @@ func (s *Server) GetSyncCommitteeDuties(w http.ResponseWriter, r *http.Request)
 	}
 
 	startingEpoch := min(requestedEpoch, currentEpoch)
-	slot, err := slots.EpochStart(startingEpoch)
+
+	st, err := s.Stater.StateByEpoch(ctx, startingEpoch)
 	if err != nil {
-		httputil.HandleError(w, "Could not get sync committee slot: "+err.Error(), http.StatusInternalServerError)
-		return
-	}
-	st, err := s.Stater.State(ctx, []byte(strconv.FormatUint(uint64(slot), 10)))
-	if err != nil {
-		httputil.HandleError(w, "Could not get sync committee state: "+err.Error(), http.StatusInternalServerError)
+		shared.WriteStateFetchError(w, err)
 		return
 	}
 
@@ -1327,7 +1290,7 @@ func (s *Server) GetLiveness(w http.ResponseWriter, r *http.Request) {
 		}
 		st, err = s.Stater.StateBySlot(ctx, epochEnd)
 		if err != nil {
-			httputil.HandleError(w, "Could not get slot for requested epoch: "+err.Error(), http.StatusInternalServerError)
+			shared.WriteStateFetchError(w, err)
 			return
 		}
 		participation, err = st.CurrentEpochParticipation()
@@ -1447,22 +1410,20 @@ func syncCommitteeDutiesAndVals(
 	return duties, vals, nil
 }
 
-func sortProposerDuties(w http.ResponseWriter, duties []*structs.ProposerDuty) bool {
-	ok := true
+func sortProposerDuties(duties []*structs.ProposerDuty) error {
+	var err error
 	sort.Slice(duties, func(i, j int) bool {
-		si, err := strconv.ParseUint(duties[i].Slot, 10, 64)
-		if err != nil {
-			httputil.HandleError(w, "Could not parse slot: "+err.Error(), http.StatusInternalServerError)
-			ok = false
+		si, parseErr := strconv.ParseUint(duties[i].Slot, 10, 64)
+		if parseErr != nil {
+			err = errors.Wrap(parseErr, "could not parse slot")
 			return false
 		}
-		sj, err := strconv.ParseUint(duties[j].Slot, 10, 64)
-		if err != nil {
-			httputil.HandleError(w, "Could not parse slot: "+err.Error(), http.StatusInternalServerError)
-			ok = false
+		sj, parseErr := strconv.ParseUint(duties[j].Slot, 10, 64)
+		if parseErr != nil {
+			err = errors.Wrap(parseErr, "could not parse slot")
 			return false
 		}
 		return si < sj
 	})
-	return ok
+	return err
 }

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

@@ -25,6 +25,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/operations/synccommittee"
 	p2pmock "github.com/OffchainLabs/prysm/v7/beacon-chain/p2p/testing"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/rpc/core"
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/rpc/lookup"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/rpc/testutil"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state/stategen"
@@ -2006,6 +2007,7 @@ func TestGetAttesterDuties(t *testing.T) {
 		TimeFetcher:           chain,
 		SyncChecker:           &mockSync.Sync{IsSyncing: false},
 		OptimisticModeFetcher: chain,
+		HeadFetcher:           chain,
 		BeaconDB:              db,
 	}
 
@@ -2184,6 +2186,7 @@ func TestGetAttesterDuties(t *testing.T) {
 			Stater:                &testutil.MockStater{StatesBySlot: map[primitives.Slot]state.BeaconState{0: bs}},
 			TimeFetcher:           chain,
 			OptimisticModeFetcher: chain,
+			HeadFetcher:           chain,
 			SyncChecker:           &mockSync.Sync{IsSyncing: false},
 			BeaconDB:              db,
 		}
@@ -2224,6 +2227,62 @@ func TestGetAttesterDuties(t *testing.T) {
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
 		assert.Equal(t, http.StatusServiceUnavailable, e.Code)
 	})
+	t.Run("state not found returns 404", func(t *testing.T) {
+		chainSlot := primitives.Slot(0)
+		chain := &mockChain.ChainService{
+			State: bs, Root: genesisRoot[:], Slot: &chainSlot,
+		}
+		stateNotFoundErr := lookup.NewStateNotFoundError(8192, []byte("test"))
+		s := &Server{
+			Stater:                &testutil.MockStater{CustomError: &stateNotFoundErr},
+			TimeFetcher:           chain,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			OptimisticModeFetcher: chain,
+			HeadFetcher:           chain,
+		}
+
+		var body bytes.Buffer
+		_, err = body.WriteString("[\"0\"]")
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodGet, "http://www.example.com/eth/v1/validator/duties/attester/{epoch}", &body)
+		request.SetPathValue("epoch", "0")
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.GetAttesterDuties(writer, request)
+		assert.Equal(t, http.StatusNotFound, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusNotFound, e.Code)
+		assert.StringContains(t, "State not found", e.Message)
+	})
+	t.Run("state fetch error returns 500", func(t *testing.T) {
+		chainSlot := primitives.Slot(0)
+		chain := &mockChain.ChainService{
+			State: bs, Root: genesisRoot[:], Slot: &chainSlot,
+		}
+		s := &Server{
+			Stater:                &testutil.MockStater{CustomError: errors.New("internal error")},
+			TimeFetcher:           chain,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			OptimisticModeFetcher: chain,
+			HeadFetcher:           chain,
+		}
+
+		var body bytes.Buffer
+		_, err = body.WriteString("[\"0\"]")
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodGet, "http://www.example.com/eth/v1/validator/duties/attester/{epoch}", &body)
+		request.SetPathValue("epoch", "0")
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.GetAttesterDuties(writer, request)
+		assert.Equal(t, http.StatusInternalServerError, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusInternalServerError, e.Code)
+	})
 }
 
 func TestGetProposerDuties(t *testing.T) {
@@ -2427,6 +2486,60 @@ func TestGetProposerDuties(t *testing.T) {
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
 		assert.Equal(t, http.StatusServiceUnavailable, e.Code)
 	})
+	t.Run("state not found returns 404", func(t *testing.T) {
+		bs, err := transition.GenesisBeaconState(t.Context(), deposits, 0, eth1Data)
+		require.NoError(t, err)
+		chainSlot := primitives.Slot(0)
+		chain := &mockChain.ChainService{
+			State: bs, Root: genesisRoot[:], Slot: &chainSlot,
+		}
+		stateNotFoundErr := lookup.NewStateNotFoundError(8192, []byte("test"))
+		s := &Server{
+			Stater:                &testutil.MockStater{CustomError: &stateNotFoundErr},
+			TimeFetcher:           chain,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			OptimisticModeFetcher: chain,
+			HeadFetcher:           chain,
+		}
+
+		request := httptest.NewRequest(http.MethodGet, "http://www.example.com/eth/v1/validator/duties/proposer/{epoch}", nil)
+		request.SetPathValue("epoch", "0")
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.GetProposerDuties(writer, request)
+		assert.Equal(t, http.StatusNotFound, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusNotFound, e.Code)
+		assert.StringContains(t, "State not found", e.Message)
+	})
+	t.Run("state fetch error returns 500", func(t *testing.T) {
+		bs, err := transition.GenesisBeaconState(t.Context(), deposits, 0, eth1Data)
+		require.NoError(t, err)
+		chainSlot := primitives.Slot(0)
+		chain := &mockChain.ChainService{
+			State: bs, Root: genesisRoot[:], Slot: &chainSlot,
+		}
+		s := &Server{
+			Stater:                &testutil.MockStater{CustomError: errors.New("internal error")},
+			TimeFetcher:           chain,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			OptimisticModeFetcher: chain,
+			HeadFetcher:           chain,
+		}
+
+		request := httptest.NewRequest(http.MethodGet, "http://www.example.com/eth/v1/validator/duties/proposer/{epoch}", nil)
+		request.SetPathValue("epoch", "0")
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.GetProposerDuties(writer, request)
+		assert.Equal(t, http.StatusInternalServerError, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusInternalServerError, e.Code)
+	})
 }
 
 func TestGetSyncCommitteeDuties(t *testing.T) {
@@ -2457,7 +2570,7 @@ func TestGetSyncCommitteeDuties(t *testing.T) {
 	}
 	require.NoError(t, st.SetNextSyncCommittee(nextCommittee))
 
-	mockChainService := &mockChain.ChainService{Genesis: genesisTime}
+	mockChainService := &mockChain.ChainService{Genesis: genesisTime, State: st}
 	s := &Server{
 		Stater:                &testutil.MockStater{BeaconState: st},
 		SyncChecker:           &mockSync.Sync{IsSyncing: false},
@@ -2648,7 +2761,7 @@ func TestGetSyncCommitteeDuties(t *testing.T) {
 				return newSyncPeriodSt
 			}
 		}
-		mockChainService := &mockChain.ChainService{Genesis: genesisTime, Slot: &newSyncPeriodStartSlot}
+		mockChainService := &mockChain.ChainService{Genesis: genesisTime, Slot: &newSyncPeriodStartSlot, State: newSyncPeriodSt}
 		s := &Server{
 			Stater:                &testutil.MockStater{BeaconState: stateFetchFn(newSyncPeriodStartSlot)},
 			SyncChecker:           &mockSync.Sync{IsSyncing: false},
@@ -2729,8 +2842,7 @@ func TestGetSyncCommitteeDuties(t *testing.T) {
 		slot, err := slots.EpochStart(1)
 		require.NoError(t, err)
 
-		st2, err := util.NewBeaconStateBellatrix()
-		require.NoError(t, err)
+		st2 := st.Copy()
 		require.NoError(t, st2.SetSlot(slot))
 
 		mockChainService := &mockChain.ChainService{
@@ -2744,7 +2856,7 @@ func TestGetSyncCommitteeDuties(t *testing.T) {
 			State: st2,
 		}
 		s := &Server{
-			Stater:                &testutil.MockStater{BeaconState: st},
+			Stater:                &testutil.MockStater{BeaconState: st2},
 			SyncChecker:           &mockSync.Sync{IsSyncing: false},
 			TimeFetcher:           mockChainService,
 			HeadFetcher:           mockChainService,
@@ -2789,6 +2901,62 @@ func TestGetSyncCommitteeDuties(t *testing.T) {
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
 		assert.Equal(t, http.StatusServiceUnavailable, e.Code)
 	})
+	t.Run("state not found returns 404", func(t *testing.T) {
+		slot := 2 * params.BeaconConfig().SlotsPerEpoch
+		chainService := &mockChain.ChainService{
+			Slot: &slot,
+		}
+		stateNotFoundErr := lookup.NewStateNotFoundError(8192, []byte("test"))
+		s := &Server{
+			Stater:                &testutil.MockStater{CustomError: &stateNotFoundErr},
+			TimeFetcher:           chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			OptimisticModeFetcher: chainService,
+			HeadFetcher:           chainService,
+		}
+
+		var body bytes.Buffer
+		_, err := body.WriteString("[\"1\"]")
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodGet, "http://www.example.com/eth/v1/validator/duties/sync/{epoch}", &body)
+		request.SetPathValue("epoch", "1")
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.GetSyncCommitteeDuties(writer, request)
+		assert.Equal(t, http.StatusNotFound, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusNotFound, e.Code)
+		assert.StringContains(t, "State not found", e.Message)
+	})
+	t.Run("state fetch error returns 500", func(t *testing.T) {
+		slot := 2 * params.BeaconConfig().SlotsPerEpoch
+		chainService := &mockChain.ChainService{
+			Slot: &slot,
+		}
+		s := &Server{
+			Stater:                &testutil.MockStater{CustomError: errors.New("internal error")},
+			TimeFetcher:           chainService,
+			SyncChecker:           &mockSync.Sync{IsSyncing: false},
+			OptimisticModeFetcher: chainService,
+			HeadFetcher:           chainService,
+		}
+
+		var body bytes.Buffer
+		_, err := body.WriteString("[\"1\"]")
+		require.NoError(t, err)
+		request := httptest.NewRequest(http.MethodGet, "http://www.example.com/eth/v1/validator/duties/sync/{epoch}", &body)
+		request.SetPathValue("epoch", "1")
+		writer := httptest.NewRecorder()
+		writer.Body = &bytes.Buffer{}
+
+		s.GetSyncCommitteeDuties(writer, request)
+		assert.Equal(t, http.StatusInternalServerError, writer.Code)
+		e := &httputil.DefaultJsonError{}
+		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), e))
+		assert.Equal(t, http.StatusInternalServerError, e.Code)
+	})
 }
 
 func TestPrepareBeaconProposer(t *testing.T) {

beacon-chain/rpc/lookup/BUILD.bazel

@@ -11,6 +11,7 @@ go_library(
     deps = [
         "//beacon-chain/blockchain:go_default_library",
         "//beacon-chain/core/peerdas:go_default_library",
+        "//beacon-chain/core/transition:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/db/filesystem:go_default_library",
         "//beacon-chain/rpc/core:go_default_library",

beacon-chain/rpc/lookup/stater.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/blockchain"
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/transition"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/db"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state/stategen"
@@ -98,6 +99,7 @@ type Stater interface {
 	State(ctx context.Context, id []byte) (state.BeaconState, error)
 	StateRoot(ctx context.Context, id []byte) ([]byte, error)
 	StateBySlot(ctx context.Context, slot primitives.Slot) (state.BeaconState, error)
+	StateByEpoch(ctx context.Context, epoch primitives.Epoch) (state.BeaconState, error)
 }
 
 // BeaconDbStater is an implementation of Stater. It retrieves states from the beacon chain database.
@@ -267,6 +269,46 @@ func (p *BeaconDbStater) StateBySlot(ctx context.Context, target primitives.Slot
 	return st, nil
 }
 
+// StateByEpoch returns the state for the start of the requested epoch.
+// For current or next epoch, it uses the head state and next slot cache for efficiency.
+// For past epochs, it replays blocks from the most recent canonical state.
+func (p *BeaconDbStater) StateByEpoch(ctx context.Context, epoch primitives.Epoch) (state.BeaconState, error) {
+	ctx, span := trace.StartSpan(ctx, "statefetcher.StateByEpoch")
+	defer span.End()
+
+	targetSlot, err := slots.EpochStart(epoch)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get epoch start slot")
+	}
+
+	currentSlot := p.GenesisTimeFetcher.CurrentSlot()
+	currentEpoch := slots.ToEpoch(currentSlot)
+
+	// For past epochs, use the replay mechanism
+	if epoch < currentEpoch {
+		return p.StateBySlot(ctx, targetSlot)
+	}
+
+	// For current or next epoch, use head state + next slot cache (much faster)
+	headState, err := p.ChainInfoFetcher.HeadState(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get head state")
+	}
+
+	// If head state is already at or past the target slot, return it
+	if headState.Slot() >= targetSlot {
+		return headState, nil
+	}
+
+	// Process slots using the next slot cache
+	headRoot := p.ChainInfoFetcher.CachedHeadRoot()
+	st, err := transition.ProcessSlotsUsingNextSlotCache(ctx, headState, headRoot[:], targetSlot)
+	if err != nil {
+		return nil, errors.Wrapf(err, "could not process slots up to %d", targetSlot)
+	}
+	return st, nil
+}
+
 func (p *BeaconDbStater) headStateRoot(ctx context.Context) ([]byte, error) {
 	b, err := p.ChainInfoFetcher.HeadBlock(ctx)
 	if err != nil {

beacon-chain/rpc/lookup/stater_test.go

@@ -444,3 +444,111 @@ func TestStateBySlot_AfterHeadSlot(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, primitives.Slot(101), st.Slot())
 }
+
+func TestStateByEpoch(t *testing.T) {
+	ctx := t.Context()
+	slotsPerEpoch := params.BeaconConfig().SlotsPerEpoch
+
+	t.Run("current epoch uses head state", func(t *testing.T) {
+		// Head is at slot 5 (epoch 0), requesting epoch 0
+		headSlot := primitives.Slot(5)
+		headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: headSlot})
+		require.NoError(t, err)
+
+		currentSlot := headSlot
+		mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+		p := BeaconDbStater{ChainInfoFetcher: mock, GenesisTimeFetcher: mock}
+
+		st, err := p.StateByEpoch(ctx, 0)
+		require.NoError(t, err)
+		// Should return head state since it's already past epoch start
+		assert.Equal(t, headSlot, st.Slot())
+	})
+
+	t.Run("current epoch processes slots to epoch start", func(t *testing.T) {
+		// Head is at slot 5 (epoch 0), requesting epoch 1
+		// Current slot is 32 (epoch 1), so epoch 1 is current epoch
+		headSlot := primitives.Slot(5)
+		headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: headSlot})
+		require.NoError(t, err)
+
+		currentSlot := slotsPerEpoch // slot 32, epoch 1
+		mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+		p := BeaconDbStater{ChainInfoFetcher: mock, GenesisTimeFetcher: mock}
+
+		// Note: This will fail since ProcessSlotsUsingNextSlotCache requires proper setup
+		// In real usage, the transition package handles this properly
+		_, err = p.StateByEpoch(ctx, 1)
+		// The error is expected since we don't have a fully initialized beacon state
+		// that can process slots (missing committees, etc.)
+		assert.NotNil(t, err)
+	})
+
+	t.Run("past epoch uses replay", func(t *testing.T) {
+		// Head is at epoch 2, requesting epoch 0 (past)
+		headSlot := slotsPerEpoch * 2 // slot 64, epoch 2
+		headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: headSlot})
+		require.NoError(t, err)
+
+		pastEpochSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: 0})
+		require.NoError(t, err)
+
+		currentSlot := headSlot
+		mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+		mockReplayer := mockstategen.NewReplayerBuilder()
+		mockReplayer.SetMockStateForSlot(pastEpochSt, 0)
+		p := BeaconDbStater{ChainInfoFetcher: mock, GenesisTimeFetcher: mock, ReplayerBuilder: mockReplayer}
+
+		st, err := p.StateByEpoch(ctx, 0)
+		require.NoError(t, err)
+		assert.Equal(t, primitives.Slot(0), st.Slot())
+	})
+
+	t.Run("next epoch uses head state path", func(t *testing.T) {
+		// Head is at slot 30 (epoch 0), requesting epoch 1 (next)
+		// Current slot is 30 (epoch 0), so epoch 1 is next epoch
+		headSlot := primitives.Slot(30)
+		headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: headSlot})
+		require.NoError(t, err)
+
+		currentSlot := headSlot
+		mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+		p := BeaconDbStater{ChainInfoFetcher: mock, GenesisTimeFetcher: mock}
+
+		// Note: This will fail since ProcessSlotsUsingNextSlotCache requires proper setup
+		_, err = p.StateByEpoch(ctx, 1)
+		// The error is expected since we don't have a fully initialized beacon state
+		assert.NotNil(t, err)
+	})
+
+	t.Run("head state already at target slot returns immediately", func(t *testing.T) {
+		// Head is at slot 32 (epoch 1 start), requesting epoch 1
+		headSlot := slotsPerEpoch // slot 32
+		headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: headSlot})
+		require.NoError(t, err)
+
+		currentSlot := headSlot
+		mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+		p := BeaconDbStater{ChainInfoFetcher: mock, GenesisTimeFetcher: mock}
+
+		st, err := p.StateByEpoch(ctx, 1)
+		require.NoError(t, err)
+		assert.Equal(t, headSlot, st.Slot())
+	})
+
+	t.Run("head state past target slot returns head state", func(t *testing.T) {
+		// Head is at slot 40, requesting epoch 1 (starts at slot 32)
+		headSlot := primitives.Slot(40)
+		headSt, err := statenative.InitializeFromProtoPhase0(&ethpb.BeaconState{Slot: headSlot})
+		require.NoError(t, err)
+
+		currentSlot := headSlot
+		mock := &chainMock.ChainService{State: headSt, Slot: &currentSlot}
+		p := BeaconDbStater{ChainInfoFetcher: mock, GenesisTimeFetcher: mock}
+
+		st, err := p.StateByEpoch(ctx, 1)
+		require.NoError(t, err)
+		// Returns head state since it's already >= epoch start
+		assert.Equal(t, headSlot, st.Slot())
+	})
+}

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

@@ -52,24 +52,27 @@ func (vs *Server) ProposeAttestation(ctx context.Context, att *ethpb.Attestation
 	ctx, span := trace.StartSpan(ctx, "AttesterServer.ProposeAttestation")
 	defer span.End()
 
+	if vs.SyncChecker.Syncing() {
+		return nil, status.Errorf(codes.Unavailable, "Syncing to latest head, not ready to respond")
+	}
+
 	resp, err := vs.proposeAtt(ctx, att, att.GetData().CommitteeIndex)
 	if err != nil {
 		return nil, err
 	}
 
-	if features.Get().EnableExperimentalAttestationPool {
-		if err = vs.AttestationCache.Add(att); err != nil {
-			log.WithError(err).Error("Could not save attestation")
-		}
-	} else {
-		go func() {
+	go func() {
+		if features.Get().EnableExperimentalAttestationPool {
+			if err := vs.AttestationCache.Add(att); err != nil {
+				log.WithError(err).Error("Could not save attestation")
+			}
+		} else {
 			attCopy := att.Copy()
 			if err := vs.AttPool.SaveUnaggregatedAttestation(attCopy); err != nil {
 				log.WithError(err).Error("Could not save unaggregated attestation")
-				return
 			}
-		}()
-	}
+		}
+	}()
 
 	return resp, nil
 }
@@ -82,6 +85,10 @@ func (vs *Server) ProposeAttestationElectra(ctx context.Context, singleAtt *ethp
 	ctx, span := trace.StartSpan(ctx, "AttesterServer.ProposeAttestationElectra")
 	defer span.End()
 
+	if vs.SyncChecker.Syncing() {
+		return nil, status.Errorf(codes.Unavailable, "Syncing to latest head, not ready to respond")
+	}
+
 	resp, err := vs.proposeAtt(ctx, singleAtt, singleAtt.GetCommitteeIndex())
 	if err != nil {
 		return nil, err
@@ -98,18 +105,17 @@ func (vs *Server) ProposeAttestationElectra(ctx context.Context, singleAtt *ethp
 
 	singleAttCopy := singleAtt.Copy()
 	att := singleAttCopy.ToAttestationElectra(committee)
-	if features.Get().EnableExperimentalAttestationPool {
-		if err = vs.AttestationCache.Add(att); err != nil {
-			log.WithError(err).Error("Could not save attestation")
-		}
-	} else {
-		go func() {
+	go func() {
+		if features.Get().EnableExperimentalAttestationPool {
+			if err := vs.AttestationCache.Add(att); err != nil {
+				log.WithError(err).Error("Could not save attestation")
+			}
+		} else {
 			if err := vs.AttPool.SaveUnaggregatedAttestation(att); err != nil {
 				log.WithError(err).Error("Could not save unaggregated attestation")
-				return
 			}
-		}()
-	}
+		}
+	}()
 
 	return resp, nil
 }

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

@@ -38,6 +38,7 @@ func TestProposeAttestation(t *testing.T) {
 		OperationNotifier:       (&mock.ChainService{}).OperationNotifier(),
 		TimeFetcher:             chainService,
 		AttestationStateFetcher: chainService,
+		SyncChecker:             &mockSync.Sync{IsSyncing: false},
 	}
 	head := util.NewBeaconBlock()
 	head.Block.Slot = 999
@@ -141,6 +142,7 @@ func TestProposeAttestation_IncorrectSignature(t *testing.T) {
 		P2P:               &mockp2p.MockBroadcaster{},
 		AttPool:           attestations.NewPool(),
 		OperationNotifier: (&mock.ChainService{}).OperationNotifier(),
+		SyncChecker:       &mockSync.Sync{IsSyncing: false},
 	}
 
 	req := util.HydrateAttestation(&ethpb.Attestation{})
@@ -149,6 +151,37 @@ func TestProposeAttestation_IncorrectSignature(t *testing.T) {
 	assert.ErrorContains(t, wanted, err)
 }
 
+func TestProposeAttestation_Syncing(t *testing.T) {
+	attesterServer := &Server{
+		SyncChecker: &mockSync.Sync{IsSyncing: true},
+	}
+
+	req := util.HydrateAttestation(&ethpb.Attestation{})
+	_, err := attesterServer.ProposeAttestation(t.Context(), req)
+	assert.ErrorContains(t, "Syncing to latest head", err)
+	s, ok := status.FromError(err)
+	require.Equal(t, true, ok)
+	assert.Equal(t, codes.Unavailable, s.Code())
+}
+
+func TestProposeAttestationElectra_Syncing(t *testing.T) {
+	attesterServer := &Server{
+		SyncChecker: &mockSync.Sync{IsSyncing: true},
+	}
+
+	req := &ethpb.SingleAttestation{
+		Data: &ethpb.AttestationData{
+			Source: &ethpb.Checkpoint{Root: make([]byte, 32)},
+			Target: &ethpb.Checkpoint{Root: make([]byte, 32)},
+		},
+	}
+	_, err := attesterServer.ProposeAttestationElectra(t.Context(), req)
+	assert.ErrorContains(t, "Syncing to latest head", err)
+	s, ok := status.FromError(err)
+	require.Equal(t, true, ok)
+	assert.Equal(t, codes.Unavailable, s.Code())
+}
+
 func TestGetAttestationData_OK(t *testing.T) {
 	block := util.NewBeaconBlock()
 	block.Block.Slot = 3*params.BeaconConfig().SlotsPerEpoch + 1

beacon-chain/rpc/testutil/BUILD.bazel

@@ -26,5 +26,6 @@ go_library(
         "//proto/prysm/v1alpha1:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
+        "//time/slots:go_default_library",
     ],
 )

beacon-chain/rpc/testutil/mock_stater.go

@@ -6,6 +6,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v7/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v7/time/slots"
 )
 
 // MockStater is a fake implementation of lookup.Stater.
@@ -14,6 +15,7 @@ type MockStater struct {
 	StateProviderFunc func(ctx context.Context, stateId []byte) (state.BeaconState, error)
 	BeaconStateRoot   []byte
 	StatesBySlot      map[primitives.Slot]state.BeaconState
+	StatesByEpoch     map[primitives.Epoch]state.BeaconState
 	StatesByRoot      map[[32]byte]state.BeaconState
 	CustomError       error
 }
@@ -43,3 +45,22 @@ func (m *MockStater) StateRoot(context.Context, []byte) ([]byte, error) {
 func (m *MockStater) StateBySlot(_ context.Context, s primitives.Slot) (state.BeaconState, error) {
 	return m.StatesBySlot[s], nil
 }
+
+// StateByEpoch --
+func (m *MockStater) StateByEpoch(_ context.Context, e primitives.Epoch) (state.BeaconState, error) {
+	if m.CustomError != nil {
+		return nil, m.CustomError
+	}
+	if m.StatesByEpoch != nil {
+		return m.StatesByEpoch[e], nil
+	}
+	// Fall back to StatesBySlot if StatesByEpoch is not set
+	slot, err := slots.EpochStart(e)
+	if err != nil {
+		return nil, err
+	}
+	if m.StatesBySlot != nil {
+		return m.StatesBySlot[slot], nil
+	}
+	return m.BeaconState, nil
+}

beacon-chain/sync/BUILD.bazel

@@ -144,6 +144,7 @@ go_library(
         "@com_github_libp2p_go_libp2p//core/peer:go_default_library",
         "@com_github_libp2p_go_libp2p//core/protocol:go_default_library",
         "@com_github_libp2p_go_libp2p_pubsub//:go_default_library",
+        "@com_github_libp2p_go_mplex//:go_default_library",
         "@com_github_patrickmn_go_cache//:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prometheus_client_golang//prometheus:go_default_library",

beacon-chain/sync/batch_verifier.go

@@ -161,13 +161,17 @@ func (s *Service) validateWithKzgBatchVerifier(ctx context.Context, dataColumns
 
 	timeout := time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second
 
-	resChan := make(chan error)
+	resChan := make(chan error, 1)
 	verificationSet := &kzgVerifier{dataColumns: dataColumns, resChan: resChan}
-	s.kzgChan <- verificationSet
-
 	ctx, cancel := context.WithTimeout(ctx, timeout)
 	defer cancel()
 
+	select {
+	case s.kzgChan <- verificationSet:
+	case <-ctx.Done():
+		return pubsub.ValidationIgnore, ctx.Err()
+	}
+
 	select {
 	case <-ctx.Done():
 		return pubsub.ValidationIgnore, ctx.Err() // parent context canceled, give up

beacon-chain/sync/data_column_sidecars.go

@@ -3,6 +3,7 @@ package sync
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"maps"
 	"slices"
 	"sync"
@@ -243,8 +244,10 @@ func requestDirectSidecarsFromPeers(
 	}
 
 	// Compute missing indices by root, excluding those already in storage.
+	var lastRoot [fieldparams.RootLength]byte
 	missingIndicesByRoot := make(map[[fieldparams.RootLength]byte]map[uint64]bool, len(incompleteRoots))
 	for root := range incompleteRoots {
+		lastRoot = root
 		storedIndices := storedIndicesByRoot[root]
 
 		missingIndices := make(map[uint64]bool, len(requestedIndices))
@@ -259,6 +262,7 @@ func requestDirectSidecarsFromPeers(
 		}
 	}
 
+	initialMissingRootCount := len(missingIndicesByRoot)
 	initialMissingCount := computeTotalCount(missingIndicesByRoot)
 
 	indicesByRootByPeer, err := computeIndicesByRootByPeer(params.P2P, slotByRoot, missingIndicesByRoot, connectedPeers)
@@ -301,11 +305,19 @@ func requestDirectSidecarsFromPeers(
 		}
 	}
 
-	log.WithFields(logrus.Fields{
-		"duration":            time.Since(start),
-		"initialMissingCount": initialMissingCount,
-		"finalMissingCount":   computeTotalCount(missingIndicesByRoot),
-	}).Debug("Requested direct data column sidecars from peers")
+	log := log.WithFields(logrus.Fields{
+		"duration":                time.Since(start),
+		"initialMissingRootCount": initialMissingRootCount,
+		"initialMissingCount":     initialMissingCount,
+		"finalMissingRootCount":   len(missingIndicesByRoot),
+		"finalMissingCount":       computeTotalCount(missingIndicesByRoot),
+	})
+
+	if initialMissingRootCount == 1 {
+		log = log.WithField("root", fmt.Sprintf("%#x", lastRoot))
+	}
+
+	log.Debug("Requested direct data column sidecars from peers")
 
 	return verifiedColumnsByRoot, nil
 }

beacon-chain/sync/error.go

@@ -10,6 +10,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/config/params"
 	libp2pcore "github.com/libp2p/go-libp2p/core"
 	"github.com/libp2p/go-libp2p/core/network"
+	multiplex "github.com/libp2p/go-mplex"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
@@ -147,7 +148,7 @@ func closeStreamAndWait(stream network.Stream, log *logrus.Entry) {
 }
 
 func isUnwantedError(err error) bool {
-	for _, e := range []error{network.ErrReset, io.EOF, types.ErrIODeadline} {
+	for _, e := range []error{network.ErrReset, multiplex.ErrShutdown, io.EOF, types.ErrIODeadline} {
 		if errors.Is(err, e) || err.Error() == e.Error() {
 			return true
 		}

beacon-chain/sync/kzg_batch_verifier_test.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/blockchain/kzg"
+	"github.com/OffchainLabs/prysm/v7/config/params"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
 	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v7/testing/assert"
@@ -268,6 +269,71 @@ func TestKzgBatchVerifierFallback(t *testing.T) {
 	})
 }
 
+func TestValidateWithKzgBatchVerifier_DeadlockOnTimeout(t *testing.T) {
+	err := kzg.Start()
+	require.NoError(t, err)
+
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	cfg.SecondsPerSlot = 0
+	params.OverrideBeaconConfig(cfg)
+
+	ctx, cancel := context.WithCancel(t.Context())
+	defer cancel()
+
+	service := &Service{
+		ctx:     ctx,
+		kzgChan: make(chan *kzgVerifier),
+	}
+	go service.kzgVerifierRoutine()
+
+	result, err := service.validateWithKzgBatchVerifier(context.Background(), nil)
+	require.Equal(t, pubsub.ValidationIgnore, result)
+	require.ErrorIs(t, err, context.DeadlineExceeded)
+
+	done := make(chan struct{})
+	go func() {
+		_, _ = service.validateWithKzgBatchVerifier(context.Background(), nil)
+		close(done)
+	}()
+
+	select {
+	case <-done:
+	case <-time.After(500 * time.Millisecond):
+		t.Fatal("validateWithKzgBatchVerifier blocked")
+	}
+}
+
+func TestValidateWithKzgBatchVerifier_ContextCanceledBeforeSend(t *testing.T) {
+	cancelledCtx, cancel := context.WithCancel(t.Context())
+	cancel()
+
+	service := &Service{
+		ctx:     context.Background(),
+		kzgChan: make(chan *kzgVerifier),
+	}
+
+	done := make(chan struct{})
+	go func() {
+		result, err := service.validateWithKzgBatchVerifier(cancelledCtx, nil)
+		require.Equal(t, pubsub.ValidationIgnore, result)
+		require.ErrorIs(t, err, context.Canceled)
+		close(done)
+	}()
+
+	select {
+	case <-done:
+	case <-time.After(500 * time.Millisecond):
+		t.Fatal("validateWithKzgBatchVerifier did not return after context cancellation")
+	}
+
+	select {
+	case <-service.kzgChan:
+		t.Fatal("verificationSet was sent to kzgChan despite canceled context")
+	default:
+	}
+}
+
 func createValidTestDataColumns(t *testing.T, count int) []blocks.RODataColumn {
 	_, roSidecars, _ := util.GenerateTestFuluBlockWithSidecars(t, count)
 	if len(roSidecars) >= count {

beacon-chain/sync/metrics.go

@@ -204,6 +204,13 @@ var (
 		},
 	)
 
+	dataColumnsRecoveredFromELAttempts = promauto.NewCounter(
+		prometheus.CounterOpts{
+			Name: "data_columns_recovered_from_el_attempts",
+			Help: "Count the number of data columns recovery attempts from the execution layer.",
+		},
+	)
+
 	dataColumnsRecoveredFromELTotal = promauto.NewCounter(
 		prometheus.CounterOpts{
 			Name: "data_columns_recovered_from_el_total",
@@ -242,6 +249,13 @@ var (
 			Buckets: []float64{100, 250, 500, 750, 1000, 1500, 2000, 4000, 8000, 12000, 16000},
 		},
 	)
+
+	dataColumnSidecarsObtainedViaELCount = promauto.NewSummary(
+		prometheus.SummaryOpts{
+			Name: "data_column_obtained_via_el_count",
+			Help: "Count the number of data column sidecars obtained via the execution layer.",
+		},
+	)
 )
 
 func (s *Service) updateMetrics() {

beacon-chain/sync/pending_attestations_queue.go

@@ -3,9 +3,9 @@ package sync
 import (
 	"bytes"
 	"context"
-	"encoding/hex"
 	"fmt"
 	"slices"
+	"time"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/blockchain"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/blocks"
@@ -21,13 +21,23 @@ import (
 	"github.com/OffchainLabs/prysm/v7/monitoring/tracing/trace"
 	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v7/runtime/version"
-	"github.com/OffchainLabs/prysm/v7/time"
 	"github.com/OffchainLabs/prysm/v7/time/slots"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
 
-var pendingAttsLimit = 32768
+const pendingAttsLimit = 32768
+
+// aggregatorIndexFilter defines how aggregator index should be handled in equality checks.
+type aggregatorIndexFilter int
+
+const (
+	// ignoreAggregatorIndex means aggregates differing only by aggregator index are considered equal.
+	ignoreAggregatorIndex aggregatorIndexFilter = iota
+	// includeAggregatorIndex means aggregator index must also match for aggregates to be considered equal.
+	includeAggregatorIndex
+)
 
 // This method processes pending attestations as a "known" block as arrived. With validations,
 // the valid attestations get saved into the operation mem pool, and the invalid attestations gets deleted
@@ -50,16 +60,7 @@ func (s *Service) processPendingAttsForBlock(ctx context.Context, bRoot [32]byte
 	attestations := s.blkRootToPendingAtts[bRoot]
 	s.pendingAttsLock.RUnlock()
 
-	if len(attestations) > 0 {
-		start := time.Now()
-		s.processAttestations(ctx, attestations)
-		duration := time.Since(start)
-		log.WithFields(logrus.Fields{
-			"blockRoot":        hex.EncodeToString(bytesutil.Trunc(bRoot[:])),
-			"pendingAttsCount": len(attestations),
-			"duration":         duration,
-		}).Debug("Verified and saved pending attestations to pool")
-	}
+	s.processAttestations(ctx, attestations)
 
 	randGen := rand.NewGenerator()
 	// Delete the missing block root key from pending attestation queue so a node will not request for the block again.
@@ -79,26 +80,71 @@ func (s *Service) processPendingAttsForBlock(ctx context.Context, bRoot [32]byte
 	return s.sendBatchRootRequest(ctx, pendingRoots, randGen)
 }
 
+// processAttestations processes a list of attestations.
+// It assumes (for logging purposes only) that all attestations pertain to the same block.
 func (s *Service) processAttestations(ctx context.Context, attestations []any) {
 	if len(attestations) == 0 {
 		return
 	}
 
+	firstAttestation := attestations[0]
+	var blockRoot []byte
+	switch v := firstAttestation.(type) {
+	case ethpb.Att:
+		blockRoot = v.GetData().BeaconBlockRoot
+	case ethpb.SignedAggregateAttAndProof:
+		blockRoot = v.AggregateAttestationAndProof().AggregateVal().GetData().BeaconBlockRoot
+	default:
+		log.Warnf("Unexpected attestation type %T, skipping processing", v)
+		return
+	}
+
+	validAggregates := make([]ethpb.SignedAggregateAttAndProof, 0, len(attestations))
+	startAggregate := time.Now()
 	atts := make([]ethpb.Att, 0, len(attestations))
+	aggregateAttAndProofCount := 0
 	for _, att := range attestations {
 		switch v := att.(type) {
 		case ethpb.Att:
 			atts = append(atts, v)
 		case ethpb.SignedAggregateAttAndProof:
-			s.processAggregate(ctx, v)
+			aggregateAttAndProofCount++
+			// Avoid processing multiple aggregates only differing by aggregator index.
+			if slices.ContainsFunc(validAggregates, func(other ethpb.SignedAggregateAttAndProof) bool {
+				return pendingAggregatesAreEqual(v, other, ignoreAggregatorIndex)
+			}) {
+				continue
+			}
+
+			if err := s.processAggregate(ctx, v); err != nil {
+				log.WithError(err).Debug("Pending aggregate attestation could not be processed")
+				continue
+			}
+
+			validAggregates = append(validAggregates, v)
 		default:
 			log.Warnf("Unexpected attestation type %T, skipping", v)
 		}
 	}
+	durationAggregateAttAndProof := time.Since(startAggregate)
 
+	startAtts := time.Now()
 	for _, bucket := range bucketAttestationsByData(atts) {
 		s.processAttestationBucket(ctx, bucket)
 	}
+
+	durationAtts := time.Since(startAtts)
+
+	log.WithFields(logrus.Fields{
+		"blockRoot":                       fmt.Sprintf("%#x", blockRoot),
+		"totalCount":                      len(attestations),
+		"aggregateAttAndProofCount":       aggregateAttAndProofCount,
+		"uniqueAggregateAttAndProofCount": len(validAggregates),
+		"attCount":                        len(atts),
+		"durationTotal":                   durationAggregateAttAndProof + durationAtts,
+		"durationAggregateAttAndProof":    durationAggregateAttAndProof,
+		"durationAtts":                    durationAtts,
+	}).Debug("Verified and saved pending attestations to pool")
 }
 
 // attestationBucket groups attestations with the same AttestationData for batch processing.
@@ -303,21 +349,20 @@ func (s *Service) processVerifiedAttestation(
 	})
 }
 
-func (s *Service) processAggregate(ctx context.Context, aggregate ethpb.SignedAggregateAttAndProof) {
+func (s *Service) processAggregate(ctx context.Context, aggregate ethpb.SignedAggregateAttAndProof) error {
 	res, err := s.validateAggregatedAtt(ctx, aggregate)
 	if err != nil {
 		log.WithError(err).Debug("Pending aggregated attestation failed validation")
-		return
+		return errors.Wrap(err, "validate aggregated att")
 	}
+
 	if res != pubsub.ValidationAccept || !s.validateBlockInAttestation(ctx, aggregate) {
-		log.Debug("Pending aggregated attestation failed validation")
-		return
+		return errors.New("Pending aggregated attestation failed validation")
 	}
 
 	att := aggregate.AggregateAttestationAndProof().AggregateVal()
 	if err := s.saveAttestation(att); err != nil {
-		log.WithError(err).Debug("Could not save aggregated attestation")
-		return
+		return errors.Wrap(err, "save attestation")
 	}
 
 	_ = s.setAggregatorIndexEpochSeen(att.GetData().Target.Epoch, aggregate.AggregateAttestationAndProof().GetAggregatorIndex())
@@ -325,6 +370,8 @@ func (s *Service) processAggregate(ctx context.Context, aggregate ethpb.SignedAg
 	if err := s.cfg.p2p.Broadcast(ctx, aggregate); err != nil {
 		log.WithError(err).Debug("Could not broadcast aggregated attestation")
 	}
+
+	return nil
 }
 
 // This defines how pending aggregates are saved in the map. The key is the
@@ -336,7 +383,7 @@ func (s *Service) savePendingAggregate(agg ethpb.SignedAggregateAttAndProof) {
 
 	s.savePending(root, agg, func(other any) bool {
 		a, ok := other.(ethpb.SignedAggregateAttAndProof)
-		return ok && pendingAggregatesAreEqual(agg, a)
+		return ok && pendingAggregatesAreEqual(agg, a, includeAggregatorIndex)
 	})
 }
 
@@ -391,13 +438,19 @@ func (s *Service) savePending(root [32]byte, pending any, isEqual func(other any
 	s.blkRootToPendingAtts[root] = append(s.blkRootToPendingAtts[root], pending)
 }
 
-func pendingAggregatesAreEqual(a, b ethpb.SignedAggregateAttAndProof) bool {
+// pendingAggregatesAreEqual checks if two pending aggregate attestations are equal.
+// The filter parameter controls whether aggregator index is considered in the equality check.
+func pendingAggregatesAreEqual(a, b ethpb.SignedAggregateAttAndProof, filter aggregatorIndexFilter) bool {
 	if a.Version() != b.Version() {
 		return false
 	}
-	if a.AggregateAttestationAndProof().GetAggregatorIndex() != b.AggregateAttestationAndProof().GetAggregatorIndex() {
-		return false
+
+	if filter == includeAggregatorIndex {
+		if a.AggregateAttestationAndProof().GetAggregatorIndex() != b.AggregateAttestationAndProof().GetAggregatorIndex() {
+			return false
+		}
 	}
+
 	aAtt := a.AggregateAttestationAndProof().AggregateVal()
 	bAtt := b.AggregateAttestationAndProof().AggregateVal()
 	if aAtt.GetData().Slot != bAtt.GetData().Slot {

beacon-chain/sync/pending_attestations_queue_test.go

@@ -94,7 +94,7 @@ func TestProcessPendingAtts_NoBlockRequestBlock(t *testing.T) {
 	// Process block A (which exists and has no pending attestations)
 	// This should skip processing attestations for A and request blocks B and C
 	require.NoError(t, r.processPendingAttsForBlock(t.Context(), rootA))
-	require.LogsContain(t, hook, "Requesting block by root")
+	require.LogsContain(t, hook, "Requesting blocks by root")
 }
 
 func TestProcessPendingAtts_HasBlockSaveUnaggregatedAtt(t *testing.T) {
@@ -911,17 +911,17 @@ func Test_pendingAggregatesAreEqual(t *testing.T) {
 					},
 					AggregationBits: bitfield.Bitlist{0b1111},
 				}}}
-		assert.Equal(t, true, pendingAggregatesAreEqual(a, b))
+		assert.Equal(t, true, pendingAggregatesAreEqual(a, b, includeAggregatorIndex))
 	})
 	t.Run("different version", func(t *testing.T) {
 		a := &ethpb.SignedAggregateAttestationAndProof{Message: &ethpb.AggregateAttestationAndProof{AggregatorIndex: 1}}
 		b := &ethpb.SignedAggregateAttestationAndProofElectra{Message: &ethpb.AggregateAttestationAndProofElectra{AggregatorIndex: 1}}
-		assert.Equal(t, false, pendingAggregatesAreEqual(a, b))
+		assert.Equal(t, false, pendingAggregatesAreEqual(a, b, includeAggregatorIndex))
 	})
 	t.Run("different aggregator index", func(t *testing.T) {
 		a := &ethpb.SignedAggregateAttestationAndProof{Message: &ethpb.AggregateAttestationAndProof{AggregatorIndex: 1}}
 		b := &ethpb.SignedAggregateAttestationAndProof{Message: &ethpb.AggregateAttestationAndProof{AggregatorIndex: 2}}
-		assert.Equal(t, false, pendingAggregatesAreEqual(a, b))
+		assert.Equal(t, false, pendingAggregatesAreEqual(a, b, includeAggregatorIndex))
 	})
 	t.Run("different slot", func(t *testing.T) {
 		a := &ethpb.SignedAggregateAttestationAndProof{
@@ -942,7 +942,7 @@ func Test_pendingAggregatesAreEqual(t *testing.T) {
 					},
 					AggregationBits: bitfield.Bitlist{0b1111},
 				}}}
-		assert.Equal(t, false, pendingAggregatesAreEqual(a, b))
+		assert.Equal(t, false, pendingAggregatesAreEqual(a, b, includeAggregatorIndex))
 	})
 	t.Run("different committee index", func(t *testing.T) {
 		a := &ethpb.SignedAggregateAttestationAndProof{
@@ -963,7 +963,7 @@ func Test_pendingAggregatesAreEqual(t *testing.T) {
 					},
 					AggregationBits: bitfield.Bitlist{0b1111},
 				}}}
-		assert.Equal(t, false, pendingAggregatesAreEqual(a, b))
+		assert.Equal(t, false, pendingAggregatesAreEqual(a, b, includeAggregatorIndex))
 	})
 	t.Run("different aggregation bits", func(t *testing.T) {
 		a := &ethpb.SignedAggregateAttestationAndProof{
@@ -984,7 +984,30 @@ func Test_pendingAggregatesAreEqual(t *testing.T) {
 					},
 					AggregationBits: bitfield.Bitlist{0b1000},
 				}}}
-		assert.Equal(t, false, pendingAggregatesAreEqual(a, b))
+		assert.Equal(t, false, pendingAggregatesAreEqual(a, b, includeAggregatorIndex))
+	})
+	t.Run("different aggregator index should be equal while ignoring aggregator index", func(t *testing.T) {
+		a := &ethpb.SignedAggregateAttestationAndProof{
+			Message: &ethpb.AggregateAttestationAndProof{
+				AggregatorIndex: 1,
+				Aggregate: &ethpb.Attestation{
+					Data: &ethpb.AttestationData{
+						Slot:           1,
+						CommitteeIndex: 1,
+					},
+					AggregationBits: bitfield.Bitlist{0b1111},
+				}}}
+		b := &ethpb.SignedAggregateAttestationAndProof{
+			Message: &ethpb.AggregateAttestationAndProof{
+				AggregatorIndex: 2,
+				Aggregate: &ethpb.Attestation{
+					Data: &ethpb.AttestationData{
+						Slot:           1,
+						CommitteeIndex: 1,
+					},
+					AggregationBits: bitfield.Bitlist{0b1111},
+				}}}
+		assert.Equal(t, true, pendingAggregatesAreEqual(a, b, ignoreAggregatorIndex))
 	})
 }
 

beacon-chain/sync/pending_blocks_queue.go

@@ -2,7 +2,6 @@ package sync
 
 import (
 	"context"
-	"encoding/hex"
 	"fmt"
 	"slices"
 	"sync"
@@ -44,11 +43,13 @@ func (s *Service) processPendingBlocksQueue() {
 		if !s.chainIsStarted() {
 			return
 		}
+
 		locker.Lock()
+		defer locker.Unlock()
+
 		if err := s.processPendingBlocks(s.ctx); err != nil {
 			log.WithError(err).Debug("Could not process pending blocks")
 		}
-		locker.Unlock()
 	})
 }
 
@@ -73,8 +74,10 @@ func (s *Service) processPendingBlocks(ctx context.Context) error {
 	randGen := rand.NewGenerator()
 	var parentRoots [][32]byte
 
+	blkRoots := make([][32]byte, 0, len(sortedSlots)*maxBlocksPerSlot)
+
 	// Iterate through sorted slots.
-	for _, slot := range sortedSlots {
+	for i, slot := range sortedSlots {
 		// Skip processing if slot is in the future.
 		if slot > s.cfg.clock.CurrentSlot() {
 			continue
@@ -91,6 +94,9 @@ func (s *Service) processPendingBlocks(ctx context.Context) error {
 
 		// Process each block in the queue.
 		for _, b := range blocksInCache {
+			start := time.Now()
+			totalDuration := time.Duration(0)
+
 			if err := blocks.BeaconBlockIsNil(b); err != nil {
 				continue
 			}
@@ -147,19 +153,34 @@ func (s *Service) processPendingBlocks(ctx context.Context) error {
 			}
 			cancelFunction()
 
-			// Process pending attestations for this block.
-			if err := s.processPendingAttsForBlock(ctx, blkRoot); err != nil {
-				log.WithError(err).Debug("Failed to process pending attestations for block")
-			}
+			blkRoots = append(blkRoots, blkRoot)
 
 			// Remove the processed block from the queue.
 			if err := s.removeBlockFromQueue(b, blkRoot); err != nil {
 				return err
 			}
-			log.WithFields(logrus.Fields{"slot": slot, "blockRoot": hex.EncodeToString(bytesutil.Trunc(blkRoot[:]))}).Debug("Processed pending block and cleared it in cache")
+
+			duration := time.Since(start)
+			totalDuration += duration
+			log.WithFields(logrus.Fields{
+				"slotIndex":     fmt.Sprintf("%d/%d", i+1, len(sortedSlots)),
+				"slot":          slot,
+				"root":          fmt.Sprintf("%#x", blkRoot),
+				"duration":      duration,
+				"totalDuration": totalDuration,
+			}).Debug("Processed pending block and cleared it in cache")
 		}
+
 		span.End()
 	}
+
+	for _, blkRoot := range blkRoots {
+		// Process pending attestations for this block.
+		if err := s.processPendingAttsForBlock(ctx, blkRoot); err != nil {
+			log.WithError(err).Debug("Failed to process pending attestations for block")
+		}
+	}
+
 	return s.sendBatchRootRequest(ctx, parentRoots, randGen)
 }
 
@@ -379,6 +400,19 @@ func (s *Service) sendBatchRootRequest(ctx context.Context, roots [][32]byte, ra
 			req = roots[:maxReqBlock]
 		}
 
+		if logrus.GetLevel() >= logrus.DebugLevel {
+			rootsStr := make([]string, 0, len(roots))
+			for _, req := range roots {
+				rootsStr = append(rootsStr, fmt.Sprintf("%#x", req))
+			}
+
+			log.WithFields(logrus.Fields{
+				"peer":  pid,
+				"count": len(req),
+				"roots": rootsStr,
+			}).Debug("Requesting blocks by root")
+		}
+
 		// Send the request to the peer.
 		if err := s.sendBeaconBlocksRequest(ctx, &req, pid); err != nil {
 			tracing.AnnotateError(span, err)
@@ -438,8 +472,6 @@ func (s *Service) filterOutPendingAndSynced(roots [][fieldparams.RootLength]byte
 			roots = append(roots[:i], roots[i+1:]...)
 			continue
 		}
-
-		log.WithField("blockRoot", fmt.Sprintf("%#x", r)).Debug("Requesting block by root")
 	}
 	return roots
 }

beacon-chain/sync/subscriber_beacon_blocks.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path"
+	"sync"
 	"time"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/blockchain"
@@ -48,7 +49,15 @@ func (s *Service) beaconBlockSubscriber(ctx context.Context, msg proto.Message)
 		return errors.Wrap(err, "new ro block with root")
 	}
 
-	go s.processSidecarsFromExecutionFromBlock(ctx, roBlock)
+	var wg sync.WaitGroup
+	wg.Go(func() {
+		if err := s.processSidecarsFromExecutionFromBlock(ctx, roBlock); err != nil {
+			log.WithError(err).WithFields(logrus.Fields{
+				"root": fmt.Sprintf("%#x", root),
+				"slot": block.Slot(),
+			}).Error("Failed to process sidecars from execution from block")
+		}
+	})
 
 	if err := s.cfg.chain.ReceiveBlock(ctx, signed, root, nil); err != nil {
 		if blockchain.IsInvalidBlock(err) {
@@ -69,28 +78,33 @@ func (s *Service) beaconBlockSubscriber(ctx context.Context, msg proto.Message)
 		}
 		return err
 	}
+
 	if err := s.processPendingAttsForBlock(ctx, root); err != nil {
 		return errors.Wrap(err, "process pending atts for block")
 	}
+
+	wg.Wait()
+
 	return nil
 }
 
 // processSidecarsFromExecutionFromBlock retrieves (if available) sidecars data from the execution client,
 // builds corresponding sidecars, save them to the storage, and broadcasts them over P2P if necessary.
-func (s *Service) processSidecarsFromExecutionFromBlock(ctx context.Context, roBlock blocks.ROBlock) {
+func (s *Service) processSidecarsFromExecutionFromBlock(ctx context.Context, roBlock blocks.ROBlock) error {
 	if roBlock.Version() >= version.Fulu {
 		if err := s.processDataColumnSidecarsFromExecution(ctx, peerdas.PopulateFromBlock(roBlock)); err != nil {
-			log.WithError(err).Error("Failed to process data column sidecars from execution")
-			return
+			return errors.Wrap(err, "process data column sidecars from execution")
 		}
 
-		return
+		return nil
 	}
 
 	if roBlock.Version() >= version.Deneb {
 		s.processBlobSidecarsFromExecution(ctx, roBlock)
-		return
+		return nil
 	}
+
+	return nil
 }
 
 // processBlobSidecarsFromExecution retrieves (if available) blob sidecars data from the execution client,
@@ -168,7 +182,6 @@ func (s *Service) processDataColumnSidecarsFromExecution(ctx context.Context, so
 	key := fmt.Sprintf("%#x", source.Root())
 	if _, err, _ := s.columnSidecarsExecSingleFlight.Do(key, func() (any, error) {
 		const delay = 250 * time.Millisecond
-		secondsPerHalfSlot := time.Duration(params.BeaconConfig().SecondsPerSlot/2) * time.Second
 
 		commitments, err := source.Commitments()
 		if err != nil {
@@ -186,15 +199,35 @@ func (s *Service) processDataColumnSidecarsFromExecution(ctx context.Context, so
 			return nil, errors.Wrap(err, "column indices to sample")
 		}
 
-		ctx, cancel := context.WithTimeout(ctx, secondsPerHalfSlot)
-		defer cancel()
+		log := log.WithFields(logrus.Fields{
+			"root":          fmt.Sprintf("%#x", source.Root()),
+			"slot":          source.Slot(),
+			"proposerIndex": source.ProposerIndex(),
+			"type":          source.Type(),
+		})
 
+		var constructedSidecarCount uint64
 		for iteration := uint64(0); ; /*no stop condition*/ iteration++ {
+			log = log.WithField("iteration", iteration)
+
 			// Exit early if all sidecars to sample have been seen.
 			if s.haveAllSidecarsBeenSeen(source.Slot(), source.ProposerIndex(), columnIndicesToSample) {
+				if iteration > 0 && constructedSidecarCount == 0 {
+					log.Debug("No data column sidecars constructed from the execution client")
+				}
+
 				return nil, nil
 			}
 
+			// Return if the context is done.
+			if ctx.Err() != nil {
+				return nil, ctx.Err()
+			}
+
+			if iteration == 0 {
+				dataColumnsRecoveredFromELAttempts.Inc()
+			}
+
 			// Try to reconstruct data column constructedSidecars from the execution client.
 			constructedSidecars, err := s.cfg.executionReconstructor.ConstructDataColumnSidecars(ctx, source)
 			if err != nil {
@@ -202,19 +235,11 @@ func (s *Service) processDataColumnSidecarsFromExecution(ctx context.Context, so
 			}
 
 			// No sidecars are retrieved from the EL, retry later
-			sidecarCount := uint64(len(constructedSidecars))
-			if sidecarCount == 0 {
-				if ctx.Err() != nil {
-					return nil, ctx.Err()
-				}
-
-				time.Sleep(delay)
-				continue
-			}
+			constructedCount := uint64(len(constructedSidecars))
 
 			// Boundary check.
-			if sidecarCount != fieldparams.NumberOfColumns {
-				return nil, errors.Errorf("reconstruct data column sidecars returned %d sidecars, expected %d - should never happen", sidecarCount, fieldparams.NumberOfColumns)
+			if constructedSidecarCount > 0 && constructedSidecarCount != fieldparams.NumberOfColumns {
+				return nil, errors.Errorf("reconstruct data column sidecars returned %d sidecars, expected %d - should never happen", constructedSidecarCount, fieldparams.NumberOfColumns)
 			}
 
 			unseenIndices, err := s.broadcastAndReceiveUnseenDataColumnSidecars(ctx, source.Slot(), source.ProposerIndex(), columnIndicesToSample, constructedSidecars)
@@ -222,7 +247,7 @@ func (s *Service) processDataColumnSidecarsFromExecution(ctx context.Context, so
 				return nil, errors.Wrap(err, "broadcast and receive unseen data column sidecars")
 			}
 
-			if len(unseenIndices) > 0 {
+			if constructedCount > 0 {
 				dataColumnsRecoveredFromELTotal.Inc()
 
 				log.WithFields(logrus.Fields{
@@ -234,9 +259,12 @@ func (s *Service) processDataColumnSidecarsFromExecution(ctx context.Context, so
 					"count":         len(unseenIndices),
 					"indices":       helpers.SortedPrettySliceFromMap(unseenIndices),
 				}).Debug("Constructed data column sidecars from the execution client")
+
+				return nil, nil
 			}
 
-			return nil, nil
+			// Wait before retrying.
+			time.Sleep(delay)
 		}
 	}); err != nil {
 		return err
@@ -271,6 +299,11 @@ func (s *Service) broadcastAndReceiveUnseenDataColumnSidecars(
 		unseenIndices[sidecar.Index] = true
 	}
 
+	// Exit early if there are no nothing to broadcast or receive.
+	if len(unseenSidecars) == 0 {
+		return nil, nil
+	}
+
 	// Broadcast all the data column sidecars we reconstructed but did not see via gossip (non blocking).
 	if err := s.cfg.p2p.BroadcastDataColumnSidecars(ctx, unseenSidecars); err != nil {
 		return nil, errors.Wrap(err, "broadcast data column sidecars")

beacon-chain/sync/subscriber_beacon_blocks_test.go

@@ -194,7 +194,8 @@ func TestProcessSidecarsFromExecutionFromBlock(t *testing.T) {
 					},
 					seenBlobCache: lruwrpr.New(1),
 				}
-				s.processSidecarsFromExecutionFromBlock(t.Context(), roBlock)
+				err := s.processSidecarsFromExecutionFromBlock(t.Context(), roBlock)
+				require.NoError(t, err)
 				require.Equal(t, tt.expectedBlobCount, len(chainService.Blobs))
 			})
 		}
@@ -293,7 +294,8 @@ func TestProcessSidecarsFromExecutionFromBlock(t *testing.T) {
 				roBlock, err := blocks.NewROBlock(sb)
 				require.NoError(t, err)
 
-				s.processSidecarsFromExecutionFromBlock(t.Context(), roBlock)
+				err = s.processSidecarsFromExecutionFromBlock(t.Context(), roBlock)
+				require.NoError(t, err)
 				require.Equal(t, tt.expectedDataColumnCount, len(chainService.DataColumns))
 			})
 		}

beacon-chain/sync/subscriber_data_column_sidecar.go

@@ -25,12 +25,12 @@ func (s *Service) dataColumnSubscriber(ctx context.Context, msg proto.Message) e
 	}
 
 	if err := s.receiveDataColumnSidecar(ctx, sidecar); err != nil {
-		return errors.Wrap(err, "receive data column sidecar")
+		return wrapDataColumnError(sidecar, "receive data column sidecar", err)
 	}
 
 	wg.Go(func() error {
 		if err := s.processDataColumnSidecarsFromReconstruction(ctx, sidecar); err != nil {
-			return errors.Wrap(err, "process data column sidecars from reconstruction")
+			return wrapDataColumnError(sidecar, "process data column sidecars from reconstruction", err)
 		}
 
 		return nil
@@ -38,7 +38,7 @@ func (s *Service) dataColumnSubscriber(ctx context.Context, msg proto.Message) e
 
 	wg.Go(func() error {
 		if err := s.processDataColumnSidecarsFromExecution(ctx, peerdas.PopulateFromSidecar(sidecar)); err != nil {
-			return errors.Wrap(err, "process data column sidecars from execution")
+			return wrapDataColumnError(sidecar, "process data column sidecars from execution", err)
 		}
 
 		return nil
@@ -110,3 +110,7 @@ func (s *Service) allDataColumnSubnets(_ primitives.Slot) map[uint64]bool {
 
 	return allSubnets
 }
+
+func wrapDataColumnError(sidecar blocks.VerifiedRODataColumn, message string, err error) error {
+	return fmt.Errorf("%s - slot %d, root %s: %w", message, sidecar.SignedBlockHeader.Header.Slot, fmt.Sprintf("%#x", sidecar.BlockRoot()), err)
+}

beacon-chain/sync/validate_data_column.go

@@ -51,14 +51,12 @@ func (s *Service) validateDataColumn(ctx context.Context, pid peer.ID, msg *pubs
 	// Decode the message, reject if it fails.
 	m, err := s.decodePubsubMessage(msg)
 	if err != nil {
-		log.WithError(err).Error("Failed to decode message")
 		return pubsub.ValidationReject, err
 	}
 
 	// Reject messages that are not of the expected type.
 	dcsc, ok := m.(*eth.DataColumnSidecar)
 	if !ok {
-		log.WithField("message", m).Error("Message is not of type *eth.DataColumnSidecar")
 		return pubsub.ValidationReject, errWrongMessage
 	}
 

beacon-chain/sync/validate_light_client_test.go

@@ -54,11 +54,13 @@ func TestValidateLightClientOptimisticUpdate(t *testing.T) {
 	cfg.CapellaForkEpoch = 3
 	cfg.DenebForkEpoch = 4
 	cfg.ElectraForkEpoch = 5
+	cfg.FuluForkEpoch = 6
 	cfg.ForkVersionSchedule[[4]byte{1, 0, 0, 0}] = 1
 	cfg.ForkVersionSchedule[[4]byte{2, 0, 0, 0}] = 2
 	cfg.ForkVersionSchedule[[4]byte{3, 0, 0, 0}] = 3
 	cfg.ForkVersionSchedule[[4]byte{4, 0, 0, 0}] = 4
 	cfg.ForkVersionSchedule[[4]byte{5, 0, 0, 0}] = 5
+	cfg.ForkVersionSchedule[[4]byte{6, 0, 0, 0}] = 6
 	params.OverrideBeaconConfig(cfg)
 
 	secondsPerSlot := int(params.BeaconConfig().SecondsPerSlot)
@@ -101,7 +103,10 @@ func TestValidateLightClientOptimisticUpdate(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		for v := 1; v < 6; v++ {
+		for v := range version.All() {
+			if v == version.Phase0 {
+				continue
+			}
 			t.Run(test.name+"_"+version.String(v), func(t *testing.T) {
 				ctx := t.Context()
 				p := p2ptest.NewTestP2P(t)
@@ -180,11 +185,13 @@ func TestValidateLightClientFinalityUpdate(t *testing.T) {
 	cfg.CapellaForkEpoch = 3
 	cfg.DenebForkEpoch = 4
 	cfg.ElectraForkEpoch = 5
+	cfg.FuluForkEpoch = 6
 	cfg.ForkVersionSchedule[[4]byte{1, 0, 0, 0}] = 1
 	cfg.ForkVersionSchedule[[4]byte{2, 0, 0, 0}] = 2
 	cfg.ForkVersionSchedule[[4]byte{3, 0, 0, 0}] = 3
 	cfg.ForkVersionSchedule[[4]byte{4, 0, 0, 0}] = 4
 	cfg.ForkVersionSchedule[[4]byte{5, 0, 0, 0}] = 5
+	cfg.ForkVersionSchedule[[4]byte{6, 0, 0, 0}] = 6
 	params.OverrideBeaconConfig(cfg)
 
 	secondsPerSlot := int(params.BeaconConfig().SecondsPerSlot)
@@ -227,7 +234,10 @@ func TestValidateLightClientFinalityUpdate(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		for v := 1; v < 6; v++ {
+		for v := range version.All() {
+			if v == version.Phase0 {
+				continue
+			}
 			t.Run(test.name+"_"+version.String(v), func(t *testing.T) {
 				ctx := t.Context()
 				p := p2ptest.NewTestP2P(t)

beacon-chain/verification/data_column.go

@@ -361,7 +361,7 @@ func (dv *RODataColumnsVerifier) SidecarParentSeen(parentSeen func([fieldparams.
 		}
 
 		if !dv.fc.HasNode(parentRoot) {
-			return columnErrBuilder(errSidecarParentNotSeen)
+			return columnErrBuilder(errors.Wrapf(errSidecarParentNotSeen, "parent root: %#x", parentRoot))
 		}
 	}
 

changelog/SashaMalysehko_fix-return-after-check.md

@@ -0,0 +1,3 @@
+## Fixed
+
+- Fix missing return after version header check in SubmitAttesterSlashingsV2.

changelog/aarsh-revert-autonatv2.md

@@ -0,0 +1,2 @@
+### Ignored
+- Reverts AutoNatV2 change introduced in https://github.com/OffchainLabs/prysm/pull/16100 as the libp2p upgrade fails inter-op testing.

changelog/aarsh_libp2p_autonatv2_per_address.md

@@ -1,3 +0,0 @@
-### Added
-
-- Add support for detecting and logging per address reachability via libp2p AutoNAT v2.

changelog/avoid_kzg_send_after_context_cancel.md

@@ -0,0 +1,3 @@
+### Fixed
+
+- Prevent blocked sends to the KZG batch verifier when the caller context is already canceled, avoiding useless queueing and potential hangs.

changelog/bastin_fix-lcp2p-bug.md

@@ -0,0 +1,3 @@
+### Fixed
+
+- Fix the missing fork version object mapping for Fulu in light client p2p.

changelog/fix_kzg_batch_verifier_timeout_deadlock.md

@@ -0,0 +1,3 @@
+### Fixed
+
+- Fix deadlock in data column gossip KZG batch verification when a caller times out preventing result delivery.

changelog/james-prysm_align-atter-pool-apis.md

@@ -0,0 +1,3 @@
+### Changed
+
+- the /eth/v2/beacon/pool/attestations and /eth/v1/beacon/pool/sync_committees now returns a 503 error if the node is still syncing, the rest api is also working in a similar process to gRPC broadcasting immediately now.

changelog/james-prysm_fix-rest-replay-state.md

@@ -0,0 +1,3 @@
+### Fixed 
+
+- fixed replay state issue in rest api caused by attester and sync committee duties endpoints

changelog/james-prysm_skip-e2e-slot1-check.md

@@ -0,0 +1,3 @@
+### Changed
+
+- e2e sync committee evaluator now skips the first slot after startup, we already skip the fork epoch for checks here, this skip only applies on startup, due to altair always from 0 and validators need to warm up.

changelog/manu-agg.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Pending aggregates: When multiple aggregated attestations only differing by the aggregator index are in the pending queue, only process one of them.

changelog/manu-remove-error-logs.md

@@ -0,0 +1,2 @@
+### Changed
+- `validateDataColumn`: Remove error logs.

changelog/manu_disable_get_blobs_v2.md

@@ -0,0 +1,2 @@
+### Added
+- `--disable-get-blobs-v2` flag.

changelog/manu_reconstruct-metrics.md

@@ -0,0 +1,7 @@
+### Added
+- prometheus histogram `cells_and_proofs_from_structured_computation_milliseconds` to track computation time for cells and proofs from structured blobs.
+- prometheus histogram `get_blobs_v2_latency_milliseconds` to track RPC latency for `getBlobsV2` calls to the execution layer.
+
+### Changed
+- Run `ComputeCellsAndProofsFromFlat` in parallel to improve performance when computing cells and proofs.
+- Run `ComputeCellsAndProofsFromStructured` in parallel to improve performance when computing cells and proofs.

changelog/potuz_return_indices_updateerr.md

@@ -0,0 +1,3 @@
+### Fixed
+
+- Do not error when committee has been computed correctly but updating the cache failed.

changelog/radek_httperror-analyzer.md

@@ -0,0 +1,3 @@
+### Added
+
+- Static analyzer that ensures each `httputil.HandleError` call is followed by a `return` statement.

changelog/radek_use-statefetch-error.md

@@ -0,0 +1,3 @@
+### Ignored
+
+- Use `WriteStateFetchError` in API handlers whenever possible. 

cmd/beacon-chain/flags/base.go

@@ -356,4 +356,9 @@ var (
 		Usage: "A comma-separated list of exponents (of 2) in decreasing order, defining the state diff hierarchy levels. The last exponent must be greater than or equal to 5.",
 		Value: cli.NewIntSlice(21, 18, 16, 13, 11, 9, 5),
 	}
+	// DisableGetBlobsV2 disables the engine_getBlobsV2 usage.
+	DisableGetBlobsV2 = &cli.BoolFlag{
+		Name:  "disable-get-blobs-v2",
+		Usage: "Disables the engine_getBlobsV2 usage.",
+	}
 )

cmd/beacon-chain/flags/config.go

@@ -17,6 +17,7 @@ type GlobalFlags struct {
 	SubscribeToAllSubnets           bool
 	Supernode                       bool
 	SemiSupernode                   bool
+	DisableGetBlobsV2               bool
 	MinimumSyncPeers                int
 	MinimumPeersPerSubnet           int
 	MaxConcurrentDials              int
@@ -72,6 +73,11 @@ func ConfigureGlobalFlags(ctx *cli.Context) error {
 		cfg.SemiSupernode = true
 	}
 
+	if ctx.Bool(DisableGetBlobsV2.Name) {
+		log.Warning("Disabling `engine_getBlobsV2` API")
+		cfg.DisableGetBlobsV2 = true
+	}
+
 	// State-diff-exponents
 	cfg.StateDiffExponents = ctx.IntSlice(StateDiffExponents.Name)
 	if features.Get().EnableStateDiff {

cmd/beacon-chain/main.go

@@ -131,7 +131,6 @@ var appFlags = []cli.Flag{
 	debug.MutexProfileFractionFlag,
 	cmd.LogFileName,
 	cmd.EnableUPnPFlag,
-	cmd.EnableAutoNATFlag,
 	cmd.ConfigFileFlag,
 	cmd.ChainConfigFileFlag,
 	cmd.GrpcMaxCallRecvMsgSizeFlag,
@@ -148,6 +147,7 @@ var appFlags = []cli.Flag{
 	flags.SlasherDirFlag,
 	flags.SlasherFlag,
 	flags.JwtId,
+	flags.DisableGetBlobsV2,
 	storage.BlobStoragePathFlag,
 	storage.DataColumnStoragePathFlag,
 	storage.BlobStorageLayout,

cmd/beacon-chain/usage.go

@@ -82,7 +82,6 @@ var appHelpFlagGroups = []flagGroup{
 		Flags: []cli.Flag{
 			cmd.BootstrapNode,
 			cmd.EnableUPnPFlag,
-			cmd.EnableAutoNATFlag,
 			cmd.NoDiscovery,
 			cmd.P2PAllowList,
 			cmd.P2PDenyList,
@@ -170,6 +169,7 @@ var appHelpFlagGroups = []flagGroup{
 			flags.ExecutionJWTSecretFlag,
 			flags.JwtId,
 			flags.InteropMockEth1DataVotesFlag,
+			flags.DisableGetBlobsV2,
 		},
 	},
 	{ // Flags relevant to configuring beacon chain monitoring.

cmd/flags.go

@@ -224,11 +224,6 @@ var (
 		Name:  "enable-upnp",
 		Usage: "Enable the service (Beacon chain or Validator) to use UPnP when possible.",
 	}
-	// EnableAutoNATFlag enables AutoNAT v2 service for per-address reachability detection.
-	EnableAutoNATFlag = &cli.BoolFlag{
-		Name:  "enable-autonat",
-		Usage: "Enable AutoNAT v2 service for per-address reachability detection. Helps diagnose connectivity issues behind NAT/firewalls.",
-	}
 	// ConfigFileFlag specifies the filepath to load flag values.
 	ConfigFileFlag = &cli.StringFlag{
 		Name:  "config-file",

deps.bzl

@@ -1974,8 +1974,8 @@ def prysm_deps():
         ],
         build_file_proto_mode = "disable_global",
         importpath = "github.com/libp2p/go-libp2p",
-        sum = "h1:A8foZk+ZEhZTv0Jb++7xUFlrFhBDv4j2Vh/uq4YX+KE=",
-        version = "v0.42.0",
+        sum = "h1:1Ur6rPCf3GR+g8jkrnaQaM0ha2IGespsnNlCqJLLALE=",
+        version = "v0.39.1",
     )
     go_repository(
         name = "com_github_libp2p_go_libp2p_asn_util",
@@ -2038,12 +2038,6 @@ def prysm_deps():
         sum = "h1:nrLh89LN/LEiqcFiqdKDRHjGstN300C1269K/EX0CPU=",
         version = "v4.0.2",
     )
-    go_repository(
-        name = "com_github_libp2p_go_yamux_v5",
-        importpath = "github.com/libp2p/go-yamux/v5",
-        sum = "h1:f0WoX/bEF2E8SbE4c/k1Mo+/9z0O4oC/hWEA+nfYRSg=",
-        version = "v5.0.1",
-    )
     go_repository(
         name = "com_github_libp2p_zeroconf_v2",
         importpath = "github.com/libp2p/zeroconf/v2",
@@ -2329,8 +2323,8 @@ def prysm_deps():
     go_repository(
         name = "com_github_multiformats_go_multiaddr",
         importpath = "github.com/multiformats/go-multiaddr",
-        sum = "h1:oGWEVKioVQcdIOBlYM8BH1rZDWOGJSqr9/BKl6zQ4qc=",
-        version = "v0.16.0",
+        sum = "h1:bfrHrJhrRuh/NXH5mCnemjpbGjzRw/b+tJFOD41g2tU=",
+        version = "v0.14.0",
     )
     go_repository(
         name = "com_github_multiformats_go_multiaddr_dns",
@@ -2921,8 +2915,8 @@ def prysm_deps():
             "gazelle:exclude tools.go",
         ],
         importpath = "github.com/quic-go/quic-go",
-        sum = "h1:/SlHrCRElyaU6MaEPKqKr9z83sBg2v4FLLvWM+Z47pA=",
-        version = "v0.52.0",
+        sum = "h1:x09Agz4ATTMEP3qb5P0MRxNZfd6O9wAyK3qwwqQZVQc=",
+        version = "v0.49.1-0.20250925085836-275c172fec2b",
     )
     go_repository(
         name = "com_github_quic_go_webtransport_go",

go.mod

@@ -35,28 +35,30 @@ require (
 	github.com/herumi/bls-eth-go-binary v1.31.0
 	github.com/holiman/uint256 v1.3.2
 	github.com/ianlancetaylor/cgosymbolizer v0.0.0-20200424224625-be1b05b0b279
-	github.com/ipfs/go-log/v2 v2.6.0
+	github.com/ipfs/go-log/v2 v2.5.1
 	github.com/jedib0t/go-pretty/v6 v6.5.4
 	github.com/joonix/log v0.0.0-20200409080653-9c1d2ceb5f1d
 	github.com/json-iterator/go v1.1.12
 	github.com/k0kubun/go-ansi v0.0.0-20180517002512-3bf9e2903213
 	github.com/kisielk/errcheck v1.8.0
 	github.com/kr/pretty v0.3.1
-	github.com/libp2p/go-libp2p v0.42.0
+	github.com/libp2p/go-libp2p v0.39.1
+	github.com/libp2p/go-libp2p-mplex v0.9.0
 	github.com/libp2p/go-libp2p-pubsub v0.14.2
+	github.com/libp2p/go-mplex v0.7.0
 	github.com/logrusorgru/aurora v2.0.3+incompatible
 	github.com/manifoldco/promptui v0.7.0
 	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b
 	github.com/minio/highwayhash v1.0.2
 	github.com/minio/sha256-simd v1.0.1
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
-	github.com/multiformats/go-multiaddr v0.16.0
+	github.com/multiformats/go-multiaddr v0.14.0
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/paulbellamy/ratecounter v0.2.0
 	github.com/pborman/uuid v1.2.1
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.22.0
-	github.com/prometheus/client_model v0.6.2
+	github.com/prometheus/client_golang v1.20.5
+	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/prom2json v1.3.0
 	github.com/prysmaticlabs/fastssz v0.0.0-20251103153600-259302269bfc
 	github.com/prysmaticlabs/prombbolt v0.0.0-20210126082820-9b7adba6db7c
@@ -84,15 +86,15 @@ require (
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.34.0
 	go.opentelemetry.io/otel/sdk v1.34.0
 	go.opentelemetry.io/otel/trace v1.35.0
-	go.uber.org/automaxprocs v1.6.0
+	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 v0.0.0-20250606033433-dcc06ee1d476
+	golang.org/x/exp v0.0.0-20250128182459-e0ece0dbea4c
 	golang.org/x/sync v0.18.0
 	golang.org/x/tools v0.39.0
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1
 	google.golang.org/grpc v1.71.0
-	google.golang.org/protobuf v1.36.6
+	google.golang.org/protobuf v1.36.5
 	gopkg.in/d4l3k/messagediff.v1 v1.2.1
 	gopkg.in/yaml.v2 v2.4.0
 	gopkg.in/yaml.v3 v3.0.1
@@ -120,15 +122,19 @@ require (
 	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/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 v4.4.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 // 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-verkle v0.2.2 // indirect
 	github.com/felixge/httpsnoop v1.0.4 // indirect
@@ -141,9 +147,10 @@ require (
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	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/google/gopacket v1.1.19 // indirect
-	github.com/google/pprof v0.0.0-20250607225305-033d6d78b36a // indirect
+	github.com/google/pprof v0.0.0-20250202011525-fc3143867406 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
 	github.com/graph-gophers/graphql-go v1.3.0 // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1 // indirect
@@ -160,25 +167,26 @@ 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 v1.18.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
-	github.com/koron/go-ssdp v0.0.6 // indirect
+	github.com/klauspost/compress v1.17.11 // 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
 	github.com/leodido/go-urn v1.2.3 // indirect
 	github.com/libp2p/go-buffer-pool v0.1.0 // indirect
 	github.com/libp2p/go-flow-metrics v0.2.0 // indirect
 	github.com/libp2p/go-libp2p-asn-util v0.4.1 // indirect
 	github.com/libp2p/go-msgio v0.3.0 // indirect
+	github.com/libp2p/go-nat v0.2.0 // indirect
 	github.com/libp2p/go-netroute v0.4.0 // indirect
 	github.com/libp2p/go-reuseport v0.4.0 // indirect
-	github.com/libp2p/go-yamux/v5 v5.0.1 // indirect
+	github.com/libp2p/go-yamux/v4 v4.0.2 // indirect
 	github.com/lunixbochs/vtclean v1.0.0 // indirect
 	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/matttproud/golang_protobuf_extensions v1.0.4 // indirect
-	github.com/miekg/dns v1.1.66 // 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
@@ -193,41 +201,46 @@ require (
 	github.com/multiformats/go-multiaddr-dns v0.4.1 // indirect
 	github.com/multiformats/go-multiaddr-fmt v0.1.0 // indirect
 	github.com/multiformats/go-multibase v0.2.0 // indirect
-	github.com/multiformats/go-multicodec v0.9.1 // indirect
+	github.com/multiformats/go-multicodec v0.9.0 // indirect
 	github.com/multiformats/go-multihash v0.2.3 // indirect
-	github.com/multiformats/go-multistream v0.6.1 // indirect
+	github.com/multiformats/go-multistream v0.6.0 // indirect
 	github.com/multiformats/go-varint v0.0.7 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/onsi/ginkgo/v2 v2.23.4 // indirect
+	github.com/onsi/ginkgo/v2 v2.22.2 // indirect
+	github.com/opencontainers/runtime-spec v1.2.0 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
 	github.com/pion/datachannel v1.5.10 // indirect
 	github.com/pion/dtls/v2 v2.2.12 // indirect
-	github.com/pion/dtls/v3 v3.0.6 // indirect
-	github.com/pion/ice/v4 v4.0.10 // indirect
-	github.com/pion/interceptor v0.1.40 // indirect
+	github.com/pion/dtls/v3 v3.0.4 // indirect
+	github.com/pion/ice/v2 v2.3.37 // indirect
+	github.com/pion/ice/v4 v4.0.6 // indirect
+	github.com/pion/interceptor v0.1.37 // indirect
 	github.com/pion/logging v0.2.3 // indirect
+	github.com/pion/mdns v0.0.12 // indirect
 	github.com/pion/mdns/v2 v2.0.7 // indirect
 	github.com/pion/randutil v0.1.0 // indirect
 	github.com/pion/rtcp v1.2.15 // indirect
-	github.com/pion/rtp v1.8.19 // indirect
-	github.com/pion/sctp v1.8.39 // indirect
-	github.com/pion/sdp/v3 v3.0.13 // indirect
-	github.com/pion/srtp/v3 v3.0.6 // indirect
+	github.com/pion/rtp v1.8.11 // indirect
+	github.com/pion/sctp v1.8.35 // indirect
+	github.com/pion/sdp/v3 v3.0.10 // indirect
+	github.com/pion/srtp/v3 v3.0.4 // indirect
 	github.com/pion/stun v0.6.1 // indirect
 	github.com/pion/stun/v2 v2.0.0 // indirect
 	github.com/pion/stun/v3 v3.0.0 // indirect
 	github.com/pion/transport/v2 v2.2.10 // indirect
 	github.com/pion/transport/v3 v3.0.7 // indirect
-	github.com/pion/turn/v4 v4.0.2 // indirect
-	github.com/pion/webrtc/v4 v4.1.2 // indirect
+	github.com/pion/turn/v2 v2.1.6 // indirect
+	github.com/pion/turn/v4 v4.0.0 // indirect
+	github.com/pion/webrtc/v4 v4.0.8 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/common v0.64.0 // indirect
-	github.com/prometheus/procfs v0.16.1 // indirect
+	github.com/prometheus/common v0.62.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/quic-go/qpack v0.5.1 // indirect
-	github.com/quic-go/quic-go v0.52.0 // indirect
+	github.com/quic-go/quic-go v0.49.1-0.20250925085836-275c172fec2b // indirect
 	github.com/quic-go/webtransport-go v0.8.1-0.20241018022711-4ac2c9250e66 // indirect
+	github.com/raulk/go-watchdog v1.3.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/rogpeppe/go-internal v1.13.1 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
@@ -245,23 +258,23 @@ require (
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.34.0 // indirect
 	go.opentelemetry.io/otel/metric v1.35.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.5.0 // indirect
-	go.uber.org/dig v1.19.0 // indirect
-	go.uber.org/fx v1.24.0 // indirect
+	go.uber.org/dig v1.18.0 // indirect
+	go.uber.org/fx v1.23.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	golang.org/x/exp/typeparams v0.0.0-20231108232855-2478ac86f678 // indirect
 	golang.org/x/mod v0.30.0 // indirect
 	golang.org/x/net v0.47.0 // indirect
-	golang.org/x/oauth2 v0.30.0 // indirect
+	golang.org/x/oauth2 v0.25.0 // indirect
 	golang.org/x/telemetry v0.0.0-20251111182119-bc8e575c7b54 // indirect
 	golang.org/x/term v0.37.0 // indirect
 	golang.org/x/text v0.31.0 // indirect
-	golang.org/x/time v0.12.0 // indirect
+	golang.org/x/time v0.9.0 // indirect
 	golang.org/x/tools/go/expect v0.1.1-deprecated // indirect
 	gopkg.in/cenkalti/backoff.v1 v1.1.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
-	lukechampine.com/blake3 v1.4.1 // 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

go.sum

@@ -91,6 +91,8 @@ github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
 github.com/bazelbuild/rules_go v0.23.2 h1:Wxu7JjqnF78cKZbsBsARLSXx/jlGaSLCnUV3mTlyHvM=
 github.com/bazelbuild/rules_go v0.23.2/go.mod h1:MC23Dc/wkXEyk3Wpq6lCqz0ZAYOZDw2DR5y3N1q2i7M=
+github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
+github.com/benbjohnson/clock v1.3.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/benbjohnson/clock v1.3.5 h1:VvXlSJBzZpA/zum6Sj74hxwYI2DIxRWuNIoXAzHZz5o=
 github.com/benbjohnson/clock v1.3.5/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
@@ -128,6 +130,7 @@ github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMn
 github.com/chzyer/test v0.0.0-20210722231415-061457976a23/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/chzyer/test v1.0.0 h1:p3BQDXSxOhOG0P9z6/hGnII4LGiEPOYBhs8asl/fC04=
 github.com/chzyer/test v1.0.0/go.mod h1:2JlltgoNkt4TW/z9V/IzDdFaMTM2JPIi26O1pF38GC8=
+github.com/cilium/ebpf v0.2.0/go.mod h1:To2CFviqOWL/M0gIMsvSMlqe7em/l1ALkX1PyjrX2Qs=
 github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
@@ -153,13 +156,20 @@ github.com/consensys/bavard v0.1.22 h1:Uw2CGvbXSZWhqK59X0VG/zOjpTFuOMcPLStrp1ihI
 github.com/consensys/bavard v0.1.22/go.mod h1:k/zVjHHC4B+PQy1Pg7fgvG3ALicQw540Crag8qx+dZs=
 github.com/consensys/gnark-crypto v0.14.0 h1:DDBdl4HaBtdQsq/wfMwJvZNE80sHidrK3Nfrefatm0E=
 github.com/consensys/gnark-crypto v0.14.0/go.mod h1:CU4UijNPsHawiVGNxe9co07FkzCeWHHrb1li/n1XoU0=
+github.com/containerd/cgroups v0.0.0-20201119153540-4cbc285b3327/go.mod h1:ZJeTFisyysqgcCdecO57Dj79RfL0LNeGiFUqLYQRYLE=
+github.com/containerd/cgroups v1.1.0 h1:v8rEWFl6EoqHB+swVNjVoCJE8o3jX7e8nqBGPLaDFBM=
+github.com/containerd/cgroups v1.1.0/go.mod h1:6ppBcbh/NOOUU+dMKrykgaBnK9lCIBxHqJDGwsa1mIw=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf h1:iW4rZ826su+pqaw19uhpSCzhj44qo35pNgKFGqzDKkU=
 github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
+github.com/coreos/go-systemd/v22 v22.1.0/go.mod h1:xO0FLkIi5MaZafQlIrOotqXZ90ih+1atmu1JpKERPPk=
+github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.5 h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB0alcyc=
 github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a h1:W8mUrRp6NOVl3J+MYp5kPMoUZPp7aOYHtaua31lwRHg=
@@ -178,10 +188,10 @@ github.com/davidlazar/go-crypto v0.0.0-20200604182044-b73af7476f6c h1:pFUpOrbxDR
 github.com/davidlazar/go-crypto v0.0.0-20200604182044-b73af7476f6c/go.mod h1:6UhI8N9EjYm1c2odKpFpAYeR8dsBeM7PtzQhRgxRr9U=
 github.com/deckarep/golang-set/v2 v2.6.0 h1:XfcQbWM1LlMB8BsJ8N9vW5ehnnPVIw0je80NsVHagjM=
 github.com/deckarep/golang-set/v2 v2.6.0/go.mod h1:VAky9rY/yGXJOLEDv3OMci+7wtDpOF4IN+y82NBOac4=
-github.com/decred/dcrd/crypto/blake256 v1.1.0 h1:zPMNGQCm0g4QTY27fOCorQW7EryeQ/U0x++OzVrdms8=
-github.com/decred/dcrd/crypto/blake256 v1.1.0/go.mod h1:2OfgNZ5wDpcsFmHmCK5gZTPcCXqlm2ArzUIkw9czNJo=
-github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 h1:NMZiJj8QnKe1LgsbDayM4UoHwbvwDRwnI3hwNaAHRnc=
-github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0/go.mod h1:ZXNYxsqcloTdSy/rNShjYzMhyjf0LaoftYK0p+A3h40=
+github.com/decred/dcrd/crypto/blake256 v1.0.1 h1:7PltbUIQB7u/FfZ39+DGa/ShuMyJ5ilcvdfma9wOH6Y=
+github.com/decred/dcrd/crypto/blake256 v1.0.1/go.mod h1:2OfgNZ5wDpcsFmHmCK5gZTPcCXqlm2ArzUIkw9czNJo=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 h1:rpfIENRNNilwHwZeG5+P150SMrnNEcHYvcCuK6dPZSg=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0/go.mod h1:v57UDF4pDQJcEfFUCRop3lJL149eHGSe9Jvczhzjo/0=
 github.com/deepmap/oapi-codegen v1.6.0/go.mod h1:ryDa9AgbELGeB+YEXE1dR53yAjHwFvE9iAUlWl9Al3M=
 github.com/deepmap/oapi-codegen v1.8.2 h1:SegyeYGcdi0jLLrpbCMoJxnUUn8GBXHsvr4rbzjuhfU=
 github.com/deepmap/oapi-codegen v1.8.2/go.mod h1:YLgSKSDv/bZQB7N4ws6luhozi3cEdRktEqrX88CvjIw=
@@ -193,6 +203,9 @@ github.com/dgryski/go-farm v0.0.0-20240924180020-3414d57e47da/go.mod h1:SqUrOPUn
 github.com/dlclark/regexp2 v1.4.1-0.20201116162257-a2a8dda75c91/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
 github.com/dlclark/regexp2 v1.7.0 h1:7lJfhqlPssTb1WQx4yvTHN0uElPEv52sbaECrAQxjAo=
 github.com/dlclark/regexp2 v1.7.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
+github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=
+github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/dop251/goja v0.0.0-20211022113120-dc8c55024d06/go.mod h1:R9ET47fwRVRPZnOGvHxxhuZcbrMCuiqOz3Rlrh4KSnk=
 github.com/dop251/goja v0.0.0-20230806174421-c933cf95e127 h1:qwcF+vdFrvPSEUDSX5RVoRccG8a5DhOdWdQ4zN62zzo=
 github.com/dop251/goja v0.0.0-20230806174421-c933cf95e127/go.mod h1:QMWlm50DNe14hD7t24KEqZuUdC9sOTy8W6XbCU1mlw4=
@@ -207,6 +220,9 @@ github.com/eapache/go-resiliency v1.2.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5m
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
+github.com/elastic/gosigar v0.12.0/go.mod h1:iXRIGg2tLnu7LBdpqzyQfGDEidKCfWcCMS0WKyPWoMs=
+github.com/elastic/gosigar v0.14.3 h1:xwkKwPia+hSfg9GqrCUKYdId102m9qTJIIr7egmK/uo=
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@@ -305,12 +321,17 @@ github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1v
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@@ -394,13 +415,14 @@ github.com/google/pprof v0.0.0-20201023163331-3e6fc7fc9c4c/go.mod h1:kpwsk12EmLe
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@@ -493,8 +515,8 @@ github.com/influxdata/line-protocol v0.0.0-20210311194329-9aa0e372d097 h1:vilfsD
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@@ -520,23 +542,24 @@ github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8
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@@ -562,22 +585,28 @@ github.com/libp2p/go-buffer-pool v0.1.0 h1:oK4mSFcQz7cTQIfqbe4MIj9gLW+mnanjyFtc6
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@@ -675,21 +705,21 @@ github.com/multiformats/go-base32 v0.1.0/go.mod h1:Kj3tFY6zNr+ABYMqeUNeGvkIC/UYg
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@@ -719,17 +750,20 @@ github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108
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@@ -771,29 +805,33 @@ github.com/pion/datachannel v1.5.10/go.mod h1:p/jJfC9arb29W7WrxyKbepTU20CFgyx5oL
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@@ -807,10 +845,13 @@ github.com/pion/transport/v2 v2.2.10/go.mod h1:sq1kSLWs+cHW9E+2fJP95QudkzbK7wscs
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@@ -833,16 +874,16 @@ github.com/prometheus/client_golang v1.3.0/go.mod h1:hJaj2vgQTGQmVCsAACORcieXFeD
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@@ -850,8 +891,8 @@ github.com/prometheus/common v0.7.0/go.mod h1:DjGbpBbp5NYNiECxcL/VnbXCCaQpKd3tt2
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@@ -860,8 +901,8 @@ github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+Gx
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@@ -875,12 +916,14 @@ github.com/prysmaticlabs/protoc-gen-go-cast v0.0.0-20230228205207-28762a7b9294 h
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@@ -933,6 +976,7 @@ github.com/shurcooL/webdavfs v0.0.0-20170829043945-18c3829fa133/go.mod h1:hKmq5k
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@@ -1000,6 +1044,7 @@ github.com/umbracle/gohashtree v0.0.2-alpha.0.20230207094856-5b775a815c10 h1:CQh
 github.com/umbracle/gohashtree v0.0.2-alpha.0.20230207094856-5b775a815c10/go.mod h1:x/Pa0FF5Te9kdrlZKJK82YmAkvL8+f989USgz6Jiw7M=
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@@ -1077,23 +1122,27 @@ go.opentelemetry.io/proto/otlp v1.5.0/go.mod h1:keN8WnHxOy8PG0rQZjJJ5A2ebUoafqWp
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@@ -1135,8 +1184,8 @@ golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u0
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 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=
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@@ -1237,8 +1286,8 @@ golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43/go.mod h1:KelEdhl1UZF7XfJ
 golang.org/x/oauth2 v0.0.0-20201109201403-9fd604954f58/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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-golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
-golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
+golang.org/x/oauth2 v0.25.0 h1:CY4y7XT9v0cRI9oupztF8AgiIu99L/ksR/Xp/6jrZ70=
+golang.org/x/oauth2 v0.25.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/perf v0.0.0-20180704124530-6e6d33e29852/go.mod h1:JLpeXjPJfIyPr5TlbXLkXWLhP8nz10XfvxElABhCtcw=
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@@ -1256,6 +1305,7 @@ golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJ
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 golang.org/x/sync v0.18.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sys v0.0.0-20180810173357-98c5dad5d1a0/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -1292,6 +1342,7 @@ golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200124204421-9fbb57f87de9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200219091948-cb0a6d8edb6c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1326,6 +1377,7 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210423185535-09eb48e85fd7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -1337,6 +1389,7 @@ golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 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=
@@ -1377,12 +1430,13 @@ golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxb
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20201208040808-7e3f01d25324/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20210220033141-f8bda1e9f3ba/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
-golang.org/x/time v0.12.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
+golang.org/x/time v0.9.0 h1:EsRrnYcQiGH+5FfbgvV4AP7qEZstoyrHB0DzarOQ4ZY=
+golang.org/x/time v0.9.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180828015842-6cd1fcedba52/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181030000716-a0a13e073c7b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
@@ -1438,6 +1492,7 @@ golang.org/x/tools v0.0.0-20210108195828-e2f9c7f1fc8e/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/tools v0.1.1-0.20210205202024-ef80cdb6ec6d/go.mod h1:9bzcO0MWcOuT0tm1iBGzDVPshzfwoVvREIui8C+MHqU=
 golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.39.0 h1:ik4ho21kwuQln40uelmciQPp9SipgNDdrafrYA4TmQQ=
@@ -1566,8 +1621,8 @@ google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGj
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
-google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
+google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
+google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/bsm/ratelimit.v1 v1.0.0-20160220154919-db14e161995a/go.mod h1:KF9sEfUPAXdG8Oev9e99iLGnl2uJMjc5B+4y3O7x610=
 gopkg.in/cenkalti/backoff.v1 v1.1.0 h1:Arh75ttbsvlpVA7WtVpH4u9h6Zl46xuptxqLxPiSo4Y=
@@ -1607,6 +1662,7 @@ gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJdjuHRquDANNeA4x7B8WQ9o=
@@ -1632,8 +1688,8 @@ k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 h1:BZqlfIlq5YbRMFko6/PM7F
 k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340/go.mod h1:yD4MZYeKMBwQKVht279WycxKyM84kkAx2DPrTXaeb98=
 k8s.io/utils v0.0.0-20230726121419-3b25d923346b h1:sgn3ZU783SCgtaSJjpcVVlRqd6GSnlTLKgpAAttJvpI=
 k8s.io/utils v0.0.0-20230726121419-3b25d923346b/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
-lukechampine.com/blake3 v1.4.1 h1:I3Smz7gso8w4/TunLKec6K2fn+kyKtDxr/xcQEN84Wg=
-lukechampine.com/blake3 v1.4.1/go.mod h1:QFosUxmjB8mnrWFSNwKmvxHpfY72bmD2tQ0kBMM3kwo=
+lukechampine.com/blake3 v1.3.0 h1:sJ3XhFINmHSrYCgl958hscfIa3bw8x4DqMP3u1YvoYE=
+lukechampine.com/blake3 v1.3.0/go.mod h1:0OFRp7fBtAylGVCO40o87sbupkyIGgbpv1+M1k1LM6k=
 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=

testing/endtoend/evaluators/validator.go

@@ -262,6 +262,11 @@ 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 {
+			continue
+		}
 		expectedParticipation := expectedSyncParticipation
 		switch slots.ToEpoch(b.Block().Slot()) {
 		case params.BeaconConfig().AltairForkEpoch:

tools/analyzers/httperror/BUILD.bazel

@@ -0,0 +1,13 @@
+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",
+    visibility = ["//visibility:public"],
+    deps = [
+        "@org_golang_x_tools//go/analysis:go_default_library",
+        "@org_golang_x_tools//go/analysis/passes/inspect:go_default_library",
+        "@org_golang_x_tools//go/ast/inspector:go_default_library",
+    ],
+)

tools/analyzers/httperror/analyzer.go

@@ -0,0 +1,163 @@
+package httperror
+
+import (
+	"go/ast"
+
+	"golang.org/x/tools/go/analysis"
+	"golang.org/x/tools/go/analysis/passes/inspect"
+	"golang.org/x/tools/go/ast/inspector"
+)
+
+var Analyzer = &analysis.Analyzer{
+	Name: "httperror",
+	Doc:  "Ensures calls to httputil.HandleError are immediately followed by a return statement.",
+	Requires: []*analysis.Analyzer{
+		inspect.Analyzer,
+	},
+}
+
+func Run(pass *analysis.Pass) (any, error) {
+	ins := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
+
+	ins.Preorder([]ast.Node{(*ast.FuncDecl)(nil)}, func(n ast.Node) {
+		fn := n.(*ast.FuncDecl)
+		if fn.Body == nil {
+			return
+		}
+		// top-level: there is no next statement after the function body
+		checkBlock(pass, fn, fn.Body, nil)
+	})
+
+	return nil, nil
+}
+
+func init() {
+	Analyzer.Run = Run
+}
+
+// checkBlock inspects all statements inside block.
+// nextAfter is the statement that comes immediately *after* the statement that contains this block,
+// at the enclosing lexical level (or nil if none).
+// Example: for `if ... { ... } ; return`, when checking the if's body the nextAfter will be the top-level return stmt.
+func checkBlock(pass *analysis.Pass, fn *ast.FuncDecl, block *ast.BlockStmt, nextAfter ast.Stmt) {
+	stmts := block.List
+	for i, stmt := range stmts {
+		// compute the next statement after this statement at the same lexical (ancestor) level:
+		// if there is a sibling, use it; otherwise propagate the nextAfter we were given.
+		var nextForThisStmt ast.Stmt
+		if i+1 < len(stmts) {
+			nextForThisStmt = stmts[i+1]
+		} else {
+			nextForThisStmt = nextAfter
+		}
+
+		// Recurse into nested blocks BEFORE checking this stmt's own expr,
+		// but we must pass nextForThisStmt to nested blocks so nested HandleError
+		// will see the correct "next statement after this statement".
+		switch s := stmt.(type) {
+		case *ast.IfStmt:
+			// pass what's next after the whole if-statement down into its bodies
+			if s.Init != nil {
+				// init is a statement (rare), treat it as contained in s; it should use next being the if's body first stmt,
+				// but for our purposes we don't need to inspect s.Init specially beyond nested calls.
+				// We'll just check it with nextForThisStmt as well.
+				checkBlock(pass, fn, &ast.BlockStmt{List: []ast.Stmt{s.Init}}, nextForThisStmt)
+			}
+			if s.Body != nil {
+				checkBlock(pass, fn, s.Body, nextForThisStmt)
+			}
+			if s.Else != nil {
+				switch els := s.Else.(type) {
+				case *ast.BlockStmt:
+					checkBlock(pass, fn, els, nextForThisStmt)
+				case *ast.IfStmt:
+					// else-if: its body will receive the same nextForThisStmt
+					checkBlock(pass, fn, els.Body, nextForThisStmt)
+				}
+			}
+
+		case *ast.ForStmt:
+			if s.Init != nil {
+				checkBlock(pass, fn, &ast.BlockStmt{List: []ast.Stmt{s.Init}}, nextForThisStmt)
+			}
+			if s.Body != nil {
+				checkBlock(pass, fn, s.Body, nextForThisStmt)
+			}
+			if s.Post != nil {
+				checkBlock(pass, fn, &ast.BlockStmt{List: []ast.Stmt{s.Post}}, nextForThisStmt)
+			}
+
+		case *ast.RangeStmt:
+			if s.Body != nil {
+				checkBlock(pass, fn, s.Body, nextForThisStmt)
+			}
+
+		case *ast.BlockStmt:
+			// nested block (e.g. anonymous block) — propagate nextForThisStmt
+			checkBlock(pass, fn, s, nextForThisStmt)
+		}
+
+		// 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)
+		if call == nil {
+			continue
+		}
+
+		// Determine the actual "next statement after this call" in lexical function order:
+		// - If there is a sibling in the same block after this stmt, that's next.
+		// - Otherwise, next is nextForThisStmt (propagated from ancestor).
+		var nextStmt ast.Stmt
+		if i+1 < len(stmts) {
+			nextStmt = stmts[i+1]
+		} else {
+			nextStmt = nextAfter
+		}
+
+		// If there is a next statement and it's a return -> OK
+		if nextStmt != nil {
+			if _, ok := nextStmt.(*ast.ReturnStmt); ok {
+				// immediately followed (in lexical order) by a return at some nesting level -> OK
+				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")
+			continue
+		}
+
+		// If nextStmt == nil, this call is lexically the last statement in the function.
+		// That is allowed only if the function has no result values.
+		if fn.Type.Results == nil || len(fn.Type.Results.List) == 0 {
+			// void function: allowed
+			continue
+		}
+
+		// 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")
+	}
+}
+
+// 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 {
+	es, ok := stmt.(*ast.ExprStmt)
+	if !ok {
+		return nil
+	}
+	call, ok := es.X.(*ast.CallExpr)
+	if !ok {
+		return nil
+	}
+	sel, ok := call.Fun.(*ast.SelectorExpr)
+	if !ok {
+		return nil
+	}
+	pkgIdent, ok := sel.X.(*ast.Ident)
+	if !ok {
+		return nil
+	}
+	if pkgIdent.Name == "httputil" && sel.Sel.Name == "HandleError" {
+		return call
+	}
+	return nil
+}