Fix it For Real

* Add new DA check

* Exit early in the event no commitments exist.

* Gazelle

* Fix Mock Broadcaster

* Fix Test Setup

* Update beacon-chain/blockchain/process_block.go

Co-authored-by: Manu NALEPA <enalepa@offchainlabs.com>

* Manu's Review

* Fix Build

---------

Co-authored-by: Manu NALEPA <enalepa@offchainlabs.com>

.bazelrc

@@ -22,6 +22,7 @@ coverage --define=coverage_enabled=1
 build --workspace_status_command=./hack/workspace_status.sh
 
 build --define blst_disabled=false
+build --compilation_mode=opt
 run --define blst_disabled=false
 
 build:blst_disabled --define blst_disabled=true

beacon-chain/blockchain/BUILD.bazel

@@ -26,6 +26,7 @@ go_library(
         "receive_attestation.go",
         "receive_blob.go",
         "receive_block.go",
+        "receive_data_column.go",
         "service.go",
         "tracked_proposer.go",
         "weak_subjectivity_checks.go",
@@ -48,6 +49,7 @@ go_library(
         "//beacon-chain/core/feed:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
@@ -157,6 +159,7 @@ go_test(
         "//beacon-chain/operations/slashings:go_default_library",
         "//beacon-chain/operations/voluntaryexits:go_default_library",
         "//beacon-chain/p2p:go_default_library",
+        "//beacon-chain/p2p/testing:go_default_library",
         "//beacon-chain/startup:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",

beacon-chain/blockchain/error.go

@@ -33,6 +33,7 @@ var (
 )
 
 var errMaxBlobsExceeded = errors.New("Expected commitments in block exceeds MAX_BLOBS_PER_BLOCK")
+var errMaxDataColumnsExceeded = errors.New("Expected data columns for node exceeds NUMBER_OF_COLUMNS")
 
 // An invalid block is the block that fails state transition based on the core protocol rules.
 // The beacon node shall not be accepting nor building blocks that branch off from an invalid block.

beacon-chain/blockchain/options.go

@@ -118,9 +118,9 @@ func WithBLSToExecPool(p blstoexec.PoolManager) Option {
 }
 
 // WithP2PBroadcaster to broadcast messages after appropriate processing.
-func WithP2PBroadcaster(p p2p.Broadcaster) Option {
+func WithP2PBroadcaster(p p2p.Acceser) Option {
 	return func(s *Service) error {
-		s.cfg.P2p = p
+		s.cfg.P2P = p
 		return nil
 	}
 }

beacon-chain/blockchain/process_block.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 
@@ -514,12 +515,35 @@ func missingIndices(bs *filesystem.BlobStorage, root [32]byte, expected [][]byte
 	return missing, nil
 }
 
+func missingDataColumns(bs *filesystem.BlobStorage, root [32]byte, expected map[uint64]bool) (map[uint64]bool, error) {
+	if len(expected) == 0 {
+		return nil, nil
+	}
+	if len(expected) > int(params.BeaconConfig().NumberOfColumns) {
+		return nil, errMaxDataColumnsExceeded
+	}
+	indices, err := bs.ColumnIndices(root)
+	if err != nil {
+		return nil, err
+	}
+	missing := make(map[uint64]bool, len(expected))
+	for col := range expected {
+		if !indices[col] {
+			missing[col] = true
+		}
+	}
+	return missing, nil
+}
+
 // isDataAvailable blocks until all BlobSidecars committed to in the block are available,
 // or an error or context cancellation occurs. A nil result means that the data availability check is successful.
 // The function will first check the database to see if all sidecars have been persisted. If any
 // sidecars are missing, it will then read from the blobNotifier channel for the given root until the channel is
 // closed, the context hits cancellation/timeout, or notifications have been received for all the missing sidecars.
 func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signed interfaces.ReadOnlySignedBeaconBlock) error {
+	if features.Get().EnablePeerDAS {
+		return s.isDataAvailableDataColumns(ctx, root, signed)
+	}
 	if signed.Version() < version.Deneb {
 		return nil
 	}
@@ -591,6 +615,86 @@ func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signed int
 	}
 }
 
+func (s *Service) isDataAvailableDataColumns(ctx context.Context, root [32]byte, signed interfaces.ReadOnlySignedBeaconBlock) error {
+	if signed.Version() < version.Deneb {
+		return nil
+	}
+
+	block := signed.Block()
+	if block == nil {
+		return errors.New("invalid nil beacon block")
+	}
+	// We are only required to check within MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS
+	if !params.WithinDAPeriod(slots.ToEpoch(block.Slot()), slots.ToEpoch(s.CurrentSlot())) {
+		return nil
+	}
+	body := block.Body()
+	if body == nil {
+		return errors.New("invalid nil beacon block body")
+	}
+	kzgCommitments, err := body.BlobKzgCommitments()
+	if err != nil {
+		return errors.Wrap(err, "could not get KZG commitments")
+	}
+	// If block has not commitments there is nothing to wait for.
+	if len(kzgCommitments) == 0 {
+		return nil
+	}
+
+	colMap, err := peerdas.CustodyColumns(s.cfg.P2P.NodeID(), params.BeaconConfig().CustodyRequirement)
+	if err != nil {
+		return err
+	}
+	// expected is the number of custodied data columnns a node is expected to have.
+	expected := len(colMap)
+	if expected == 0 {
+		return nil
+	}
+	// get a map of data column indices that are not currently available.
+	missing, err := missingDataColumns(s.blobStorage, root, colMap)
+	if err != nil {
+		return err
+	}
+	// If there are no missing indices, all data column sidecars are available.
+	if len(missing) == 0 {
+		return nil
+	}
+
+	// The gossip handler for data columns writes the index of each verified data column referencing the given
+	// root to the channel returned by blobNotifiers.forRoot.
+	nc := s.blobNotifiers.forRoot(root)
+
+	// Log for DA checks that cross over into the next slot; helpful for debugging.
+	nextSlot := slots.BeginsAt(signed.Block().Slot()+1, s.genesisTime)
+	// Avoid logging if DA check is called after next slot start.
+	if nextSlot.After(time.Now()) {
+		nst := time.AfterFunc(time.Until(nextSlot), func() {
+			if len(missing) == 0 {
+				return
+			}
+			log.WithFields(daCheckLogFields(root, signed.Block().Slot(), expected, len(missing))).
+				Error("Still waiting for DA check at slot end.")
+		})
+		defer nst.Stop()
+	}
+	for {
+		select {
+		case idx := <-nc:
+			// Delete each index seen in the notification channel.
+			delete(missing, idx)
+			// Read from the channel until there are no more missing sidecars.
+			if len(missing) > 0 {
+				continue
+			}
+			// Once all sidecars have been observed, clean up the notification channel.
+			s.blobNotifiers.delete(root)
+			return nil
+		case <-ctx.Done():
+			return errors.Wrapf(ctx.Err(), "context deadline waiting for blob sidecars slot: %d, BlockRoot: %#x", block.Slot(), root)
+		}
+	}
+}
+
 func daCheckLogFields(root [32]byte, slot primitives.Slot, expected, missing int) logrus.Fields {
 	return logrus.Fields{
 		"slot":          slot,

beacon-chain/blockchain/receive_block.go

@@ -50,6 +50,12 @@ type BlobReceiver interface {
 	ReceiveBlob(context.Context, blocks.VerifiedROBlob) error
 }
 
+// DataColumnReceiver interface defines the methods of chain service for receiving new
+// data columns
+type DataColumnReceiver interface {
+	ReceiveDataColumn(context.Context, blocks.VerifiedRODataColumn) error
+}
+
 // SlashingReceiver interface defines the methods of chain service for receiving validated slashing over the wire.
 type SlashingReceiver interface {
 	ReceiveAttesterSlashing(ctx context.Context, slashings *ethpb.AttesterSlashing)

beacon-chain/blockchain/receive_data_column.go

@@ -0,0 +1,18 @@
+package blockchain
+
+import (
+	"context"
+
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+)
+
+func (s *Service) ReceiveDataColumn(ctx context.Context, ds blocks.VerifiedRODataColumn) error {
+	if err := s.blobStorage.SaveDataColumn(ds); err != nil {
+		return err
+	}
+
+	// TODO use a custom event or new method of for data columns. For speed
+	// we are simply reusing blob paths here.
+	s.sendNewBlobEvent(ds.BlockRoot(), uint64(ds.SignedBlockHeader.Header.Slot))
+	return nil
+}

beacon-chain/blockchain/service.go

@@ -82,7 +82,7 @@ type config struct {
 	ExitPool                voluntaryexits.PoolManager
 	SlashingPool            slashings.PoolManager
 	BLSToExecPool           blstoexec.PoolManager
-	P2p                     p2p.Broadcaster
+	P2P                     p2p.Acceser
 	MaxRoutines             int
 	StateNotifier           statefeed.Notifier
 	ForkChoiceStore         f.ForkChoicer

beacon-chain/blockchain/service_test.go

@@ -95,7 +95,7 @@ func setupBeaconChain(t *testing.T, beaconDB db.Database) *Service {
 		WithAttestationPool(attestations.NewPool()),
 		WithSlashingPool(slashings.NewPool()),
 		WithExitPool(voluntaryexits.NewPool()),
-		WithP2PBroadcaster(&mockBroadcaster{}),
+		WithP2PBroadcaster(&mockAccesser{}),
 		WithStateNotifier(&mockBeaconNode{}),
 		WithForkChoiceStore(fc),
 		WithAttestationService(attService),

beacon-chain/blockchain/setup_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/operations/attestations"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/operations/blstoexec"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p"
+	p2pTesting "github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p/testing"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stategen"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
@@ -44,6 +45,11 @@ type mockBroadcaster struct {
 	broadcastCalled bool
 }
 
+type mockAccesser struct {
+	mockBroadcaster
+	p2pTesting.MockPeerManager
+}
+
 func (mb *mockBroadcaster) Broadcast(_ context.Context, _ proto.Message) error {
 	mb.broadcastCalled = true
 	return nil
@@ -64,6 +70,11 @@ func (mb *mockBroadcaster) BroadcastBlob(_ context.Context, _ uint64, _ *ethpb.B
 	return nil
 }
 
+func (mb *mockBroadcaster) BroadcastDataColumn(_ context.Context, _ uint64, _ *ethpb.DataColumnSidecar) error {
+	mb.broadcastCalled = true
+	return nil
+}
+
 func (mb *mockBroadcaster) BroadcastBLSChanges(_ context.Context, _ []*ethpb.SignedBLSToExecutionChange) {
 }
 

beacon-chain/blockchain/testing/mock.go

@@ -628,6 +628,11 @@ func (c *ChainService) ReceiveBlob(_ context.Context, b blocks.VerifiedROBlob) e
 	return nil
 }
 
+// ReceiveDataColumn implements the same method in chain service
+func (c *ChainService) ReceiveDataColumn(_ context.Context, _ blocks.VerifiedRODataColumn) error {
+	return nil
+}
+
 // TargetRootForEpoch mocks the same method in the chain service
 func (c *ChainService) TargetRootForEpoch(_ [32]byte, _ primitives.Epoch) ([32]byte, error) {
 	return c.TargetRoot, nil

beacon-chain/cache/BUILD.bazel

@@ -7,6 +7,7 @@ go_library(
         "active_balance_disabled.go",  # keep
         "attestation_data.go",
         "checkpoint_state.go",
+        "column_subnet_ids.go",
         "committee.go",
         "committee_disabled.go",  # keep
         "committees.go",

beacon-chain/cache/column_subnet_ids.go

@@ -0,0 +1,65 @@
+package cache
+
+import (
+	"sync"
+	"time"
+
+	"github.com/patrickmn/go-cache"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+)
+
+type columnSubnetIDs struct {
+	colSubCache *cache.Cache
+	colSubLock  sync.RWMutex
+}
+
+// ColumnSubnetIDs for column subnet participants
+var ColumnSubnetIDs = newColumnSubnetIDs()
+
+const columnKey = "columns"
+
+func newColumnSubnetIDs() *columnSubnetIDs {
+	epochDuration := time.Duration(params.BeaconConfig().SlotsPerEpoch.Mul(params.BeaconConfig().SecondsPerSlot))
+	// Set the default duration of a column subnet subscription as the column expiry period.
+	subLength := epochDuration * time.Duration(params.BeaconConfig().MinEpochsForDataColumnSidecarsRequest)
+	persistentCache := cache.New(subLength*time.Second, epochDuration*time.Second)
+	return &columnSubnetIDs{colSubCache: persistentCache}
+}
+
+// GetColumnSubnets retrieves the data column subnets.
+func (s *columnSubnetIDs) GetColumnSubnets() ([]uint64, bool, time.Time) {
+	s.colSubLock.RLock()
+	defer s.colSubLock.RUnlock()
+
+	id, duration, ok := s.colSubCache.GetWithExpiration(columnKey)
+	if !ok {
+		return nil, false, time.Time{}
+	}
+	// Retrieve indices from the cache.
+	idxs, ok := id.([]uint64)
+	if !ok {
+		return nil, false, time.Time{}
+	}
+
+	return idxs, ok, duration
+}
+
+// AddColumnSubnets adds the relevant data column subnets.
+func (s *columnSubnetIDs) AddColumnSubnets(colIdx []uint64) {
+	s.colSubLock.Lock()
+	defer s.colSubLock.Unlock()
+
+	s.colSubCache.Set(columnKey, colIdx, 0)
+}
+
+// EmptyAllCaches empties out all the related caches and flushes any stored
+// entries on them. This should only ever be used for testing, in normal
+// production, handling of the relevant subnets for each role is done
+// separately.
+func (s *columnSubnetIDs) EmptyAllCaches() {
+	// Clear the cache.
+	s.colSubLock.Lock()
+	defer s.colSubLock.Unlock()
+
+	s.colSubCache.Flush()
+}

beacon-chain/core/blocks/signature.go

@@ -96,6 +96,24 @@ func VerifyBlockHeaderSignature(beaconState state.BeaconState, header *ethpb.Sig
 	return signing.VerifyBlockHeaderSigningRoot(header.Header, proposerPubKey, header.Signature, domain)
 }
 
+func VerifyBlockHeaderSignatureUsingCurrentFork(beaconState state.BeaconState, header *ethpb.SignedBeaconBlockHeader) error {
+	currentEpoch := slots.ToEpoch(header.Header.Slot)
+	fork, err := forks.Fork(currentEpoch)
+	if err != nil {
+		return err
+	}
+	domain, err := signing.Domain(fork, currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
+	if err != nil {
+		return err
+	}
+	proposer, err := beaconState.ValidatorAtIndex(header.Header.ProposerIndex)
+	if err != nil {
+		return err
+	}
+	proposerPubKey := proposer.PublicKey
+	return signing.VerifyBlockHeaderSigningRoot(header.Header, proposerPubKey, header.Signature, domain)
+}
+
 // VerifyBlockSignatureUsingCurrentFork verifies the proposer signature of a beacon block. This differs
 // from the above method by not using fork data from the state and instead retrieving it
 // via the respective epoch.

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

@@ -32,6 +32,9 @@ const (
 
 	// AttesterSlashingReceived is sent after an attester slashing is received from gossip or rpc
 	AttesterSlashingReceived = 8
+
+	// DataColumnSidecarReceived is sent after a data column sidecar is received from gossip or rpc.
+	DataColumnSidecarReceived = 9
 )
 
 // UnAggregatedAttReceivedData is the data sent with UnaggregatedAttReceived events.
@@ -77,3 +80,7 @@ type ProposerSlashingReceivedData struct {
 type AttesterSlashingReceivedData struct {
 	AttesterSlashing *ethpb.AttesterSlashing
 }
+
+type DataColumnSidecarReceivedData struct {
+	DataColumn *blocks.VerifiedRODataColumn
+}

beacon-chain/core/peerdas/BUILD.bazel

@@ -0,0 +1,21 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["helpers.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//config/fieldparams:go_default_library",
+        "//config/params:go_default_library",
+        "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
+        "//crypto/hash:go_default_library",
+        "//encoding/bytesutil:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
+        "@com_github_ethereum_c_kzg_4844//bindings/go:go_default_library",
+        "@com_github_ethereum_go_ethereum//p2p/enode:go_default_library",
+        "@com_github_holiman_uint256//:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
+    ],
+)

beacon-chain/core/peerdas/helpers.go

@@ -0,0 +1,240 @@
+package peerdas
+
+import (
+	"encoding/binary"
+
+	cKzg4844 "github.com/ethereum/c-kzg-4844/bindings/go"
+	"github.com/holiman/uint256"
+
+	"github.com/ethereum/go-ethereum/p2p/enode"
+	errors "github.com/pkg/errors"
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/crypto/hash"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+)
+
+const (
+	// Bytes per cell
+	bytesPerCell = cKzg4844.FieldElementsPerCell * cKzg4844.BytesPerFieldElement
+
+	// Number of cells in the extended matrix
+	extendedMatrixSize = fieldparams.MaxBlobsPerBlock * cKzg4844.CellsPerExtBlob
+)
+
+type (
+	extendedMatrix []cKzg4844.Cell
+
+	cellCoordinate struct {
+		blobIndex uint64
+		cellID    uint64
+	}
+)
+
+var (
+	errCustodySubnetCountTooLarge = errors.New("custody subnet count larger than data column sidecar subnet count")
+	errCellNotFound               = errors.New("cell not found (should never happen)")
+)
+
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#helper-functions
+func CustodyColumns(nodeId enode.ID, custodySubnetCount uint64) (map[uint64]bool, error) {
+	dataColumnSidecarSubnetCount := params.BeaconConfig().DataColumnSidecarSubnetCount
+
+	// Compute the custodied subnets.
+	subnetIds, err := CustodyColumnSubnets(nodeId, custodySubnetCount)
+	if err != nil {
+		return nil, errors.Wrap(err, "custody subnets")
+	}
+
+	columnsPerSubnet := cKzg4844.CellsPerExtBlob / dataColumnSidecarSubnetCount
+
+	// Knowing the subnet ID and the number of columns per subnet, select all the columns the node should custody.
+	// Columns belonging to the same subnet are contiguous.
+	columnIndices := make(map[uint64]bool, custodySubnetCount*columnsPerSubnet)
+	for i := uint64(0); i < columnsPerSubnet; i++ {
+		for subnetId := range subnetIds {
+			columnIndex := dataColumnSidecarSubnetCount*i + subnetId
+			columnIndices[columnIndex] = true
+		}
+	}
+
+	return columnIndices, nil
+}
+
+func CustodyColumnSubnets(nodeId enode.ID, custodySubnetCount uint64) (map[uint64]bool, error) {
+	dataColumnSidecarSubnetCount := params.BeaconConfig().DataColumnSidecarSubnetCount
+
+	// Check if the custody subnet count is larger than the data column sidecar subnet count.
+	if custodySubnetCount > dataColumnSidecarSubnetCount {
+		return nil, errCustodySubnetCountTooLarge
+	}
+
+	// First, compute the subnet IDs that the node should participate in.
+	subnetIds := make(map[uint64]bool, custodySubnetCount)
+
+	for i := uint64(0); uint64(len(subnetIds)) < custodySubnetCount; i++ {
+		nodeIdUInt256, nextNodeIdUInt256 := new(uint256.Int), new(uint256.Int)
+		nodeIdUInt256.SetBytes(nodeId.Bytes())
+		nextNodeIdUInt256.Add(nodeIdUInt256, uint256.NewInt(i))
+		nextNodeIdUInt64 := nextNodeIdUInt256.Uint64()
+		nextNodeId := bytesutil.Uint64ToBytesLittleEndian(nextNodeIdUInt64)
+
+		hashedNextNodeId := hash.Hash(nextNodeId)
+		subnetId := binary.LittleEndian.Uint64(hashedNextNodeId[:8]) % dataColumnSidecarSubnetCount
+
+		if _, exists := subnetIds[subnetId]; !exists {
+			subnetIds[subnetId] = true
+		}
+	}
+
+	return subnetIds, nil
+}
+
+// ComputeExtendedMatrix computes the extended matrix from the blobs.
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#compute_extended_matrix
+func ComputeExtendedMatrix(blobs []cKzg4844.Blob) (extendedMatrix, error) {
+	matrix := make(extendedMatrix, 0, extendedMatrixSize)
+
+	for i := range blobs {
+		// Chunk a non-extended blob into cells representing the corresponding extended blob.
+		blob := &blobs[i]
+		cells, err := cKzg4844.ComputeCells(blob)
+		if err != nil {
+			return nil, errors.Wrap(err, "compute cells for blob")
+		}
+
+		matrix = append(matrix, cells[:]...)
+	}
+
+	return matrix, nil
+}
+
+// RecoverMatrix recovers the extended matrix from some cells.
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#recover_matrix
+func RecoverMatrix(cellFromCoordinate map[cellCoordinate]cKzg4844.Cell, blobCount uint64) (extendedMatrix, error) {
+	matrix := make(extendedMatrix, 0, extendedMatrixSize)
+
+	for blobIndex := uint64(0); blobIndex < blobCount; blobIndex++ {
+		// Filter all cells that belong to the current blob.
+		cellIds := make([]uint64, 0, cKzg4844.CellsPerExtBlob)
+		for coordinate := range cellFromCoordinate {
+			if coordinate.blobIndex == blobIndex {
+				cellIds = append(cellIds, coordinate.cellID)
+			}
+		}
+
+		// Retrieve cells corresponding to all `cellIds`.
+		cellIdsCount := len(cellIds)
+
+		cells := make([]cKzg4844.Cell, 0, cellIdsCount)
+		for _, cellId := range cellIds {
+			coordinate := cellCoordinate{blobIndex: blobIndex, cellID: cellId}
+			cell, ok := cellFromCoordinate[coordinate]
+			if !ok {
+				return matrix, errCellNotFound
+			}
+
+			cells = append(cells, cell)
+		}
+
+		// Recover all cells.
+		allCellsForRow, err := cKzg4844.RecoverAllCells(cellIds, cells)
+		if err != nil {
+			return matrix, errors.Wrap(err, "recover all cells")
+		}
+
+		matrix = append(matrix, allCellsForRow[:]...)
+	}
+
+	return matrix, nil
+}
+
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#recover_matrix
+func DataColumnSidecars(signedBlock interfaces.SignedBeaconBlock, blobs []cKzg4844.Blob) ([]*ethpb.DataColumnSidecar, error) {
+	blobsCount := len(blobs)
+
+	// Get the signed block header.
+	signedBlockHeader, err := signedBlock.Header()
+	if err != nil {
+		return nil, errors.Wrap(err, "signed block header")
+	}
+
+	// Get the block body.
+	block := signedBlock.Block()
+	blockBody := block.Body()
+
+	// Get the blob KZG commitments.
+	blobKzgCommitments, err := blockBody.BlobKzgCommitments()
+	if err != nil {
+		return nil, errors.Wrap(err, "blob KZG commitments")
+	}
+
+	// Compute the KZG commitments inclusion proof.
+	kzgCommitmentsInclusionProof, err := blocks.MerkleProofKZGCommitments(blockBody)
+	if err != nil {
+		return nil, errors.Wrap(err, "merkle proof ZKG commitments")
+	}
+
+	// Compute cells and proofs.
+	cells := make([][cKzg4844.CellsPerExtBlob]cKzg4844.Cell, 0, blobsCount)
+	proofs := make([][cKzg4844.CellsPerExtBlob]cKzg4844.KZGProof, 0, blobsCount)
+
+	for i := range blobs {
+		blob := &blobs[i]
+		blobCells, blobProofs, err := cKzg4844.ComputeCellsAndProofs(blob)
+		if err != nil {
+			return nil, errors.Wrap(err, "compute cells and proofs")
+		}
+
+		cells = append(cells, blobCells)
+		proofs = append(proofs, blobProofs)
+	}
+
+	// Get the column sidecars.
+	sidecars := make([]*ethpb.DataColumnSidecar, cKzg4844.CellsPerExtBlob)
+	for columnIndex := uint64(0); columnIndex < cKzg4844.CellsPerExtBlob; columnIndex++ {
+		column := make([]cKzg4844.Cell, 0, blobsCount)
+		kzgProofOfColumn := make([]cKzg4844.KZGProof, 0, blobsCount)
+
+		for rowIndex := 0; rowIndex < blobsCount; rowIndex++ {
+			cell := cells[rowIndex][columnIndex]
+			column = append(column, cell)
+
+			kzgProof := proofs[rowIndex][columnIndex]
+			kzgProofOfColumn = append(kzgProofOfColumn, kzgProof)
+		}
+
+		columnBytes := make([][]byte, 0, blobsCount)
+		for i := range column {
+			cell := column[i]
+
+			cellBytes := make([]byte, 0, bytesPerCell)
+			for _, fieldElement := range cell {
+				cellBytes = append(cellBytes, fieldElement[:]...)
+			}
+
+			columnBytes = append(columnBytes, cellBytes)
+		}
+
+		kzgProofOfColumnBytes := make([][]byte, 0, blobsCount)
+		for _, kzgProof := range kzgProofOfColumn {
+			kzgProofOfColumnBytes = append(kzgProofOfColumnBytes, kzgProof[:])
+		}
+
+		sidecar := &ethpb.DataColumnSidecar{
+			ColumnIndex:                  columnIndex,
+			DataColumn:                   columnBytes,
+			KzgCommitments:               blobKzgCommitments,
+			KzgProof:                     kzgProofOfColumnBytes,
+			SignedBlockHeader:            signedBlockHeader,
+			KzgCommitmentsInclusionProof: kzgCommitmentsInclusionProof,
+		}
+
+		sidecars = append(sidecars, sidecar)
+	}
+
+	return sidecars, nil
+}

beacon-chain/db/filesystem/blob.go

@@ -218,6 +218,101 @@ func (bs *BlobStorage) Save(sidecar blocks.VerifiedROBlob) error {
 	return nil
 }
 
+// SaveDataColumn saves a data column to our local filesystem.
+func (bs *BlobStorage) SaveDataColumn(column blocks.VerifiedRODataColumn) error {
+	startTime := time.Now()
+	fname := namerForDataColumn(column)
+	sszPath := fname.path()
+	exists, err := afero.Exists(bs.fs, sszPath)
+	if err != nil {
+		return err
+	}
+	if exists {
+		log.Debug("Ignoring a duplicate data column sidecar save attempt")
+		return nil
+	}
+	if bs.pruner != nil {
+		hRoot, err := column.SignedBlockHeader.Header.HashTreeRoot()
+		if err != nil {
+			return err
+		}
+		if err := bs.pruner.notify(hRoot, column.SignedBlockHeader.Header.Slot, column.ColumnIndex); err != nil {
+			return errors.Wrapf(err, "problem maintaining pruning cache/metrics for sidecar with root=%#x", hRoot)
+		}
+	}
+
+	// Serialize the ethpb.DataColumnSidecar to binary data using SSZ.
+	sidecarData, err := column.MarshalSSZ()
+	if err != nil {
+		return errors.Wrap(err, "failed to serialize sidecar data")
+	} else if len(sidecarData) == 0 {
+		return errSidecarEmptySSZData
+	}
+
+	if err := bs.fs.MkdirAll(fname.dir(), directoryPermissions); err != nil {
+		return err
+	}
+	partPath := fname.partPath(fmt.Sprintf("%p", sidecarData))
+
+	partialMoved := false
+	// Ensure the partial file is deleted.
+	defer func() {
+		if partialMoved {
+			return
+		}
+		// It's expected to error if the save is successful.
+		err = bs.fs.Remove(partPath)
+		if err == nil {
+			log.WithFields(logrus.Fields{
+				"partPath": partPath,
+			}).Debugf("Removed partial file")
+		}
+	}()
+
+	// Create a partial file and write the serialized data to it.
+	partialFile, err := bs.fs.Create(partPath)
+	if err != nil {
+		return errors.Wrap(err, "failed to create partial file")
+	}
+
+	n, err := partialFile.Write(sidecarData)
+	if err != nil {
+		closeErr := partialFile.Close()
+		if closeErr != nil {
+			return closeErr
+		}
+		return errors.Wrap(err, "failed to write to partial file")
+	}
+	if bs.fsync {
+		if err := partialFile.Sync(); err != nil {
+			return err
+		}
+	}
+
+	if err := partialFile.Close(); err != nil {
+		return err
+	}
+
+	if n != len(sidecarData) {
+		return fmt.Errorf("failed to write the full bytes of sidecarData, wrote only %d of %d bytes", n, len(sidecarData))
+	}
+
+	if n == 0 {
+		return errEmptyBlobWritten
+	}
+
+	// Atomically rename the partial file to its final name.
+	err = bs.fs.Rename(partPath, sszPath)
+	if err != nil {
+		return errors.Wrap(err, "failed to rename partial file to final name")
+	}
+	partialMoved = true
+	// TODO: Use new metrics for data columns
+	blobsWrittenCounter.Inc()
+	blobSaveLatency.Observe(float64(time.Since(startTime).Milliseconds()))
+	return nil
+}
+
 // Get retrieves a single BlobSidecar by its root and index.
 // Since BlobStorage only writes blobs that have undergone full verification, the return
 // value is always a VerifiedROBlob.
@@ -243,6 +338,20 @@ func (bs *BlobStorage) Get(root [32]byte, idx uint64) (blocks.VerifiedROBlob, er
 	return verification.BlobSidecarNoop(ro)
 }
 
+// GetColumn retrieves a single DataColumnSidecar by its root and index.
+func (bs *BlobStorage) GetColumn(root [32]byte, idx uint64) (*ethpb.DataColumnSidecar, error) {
+	expected := blobNamer{root: root, index: idx}
+	encoded, err := afero.ReadFile(bs.fs, expected.path())
+	if err != nil {
+		return nil, err
+	}
+	s := &ethpb.DataColumnSidecar{}
+	if err := s.UnmarshalSSZ(encoded); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
 // Remove removes all blobs for a given root.
 func (bs *BlobStorage) Remove(root [32]byte) error {
 	rootDir := blobNamer{root: root}.dir()
@@ -286,6 +395,41 @@ func (bs *BlobStorage) Indices(root [32]byte) ([fieldparams.MaxBlobsPerBlock]boo
 	return mask, nil
 }
 
+// ColumnIndices retrieve the stored column indexes from our filesystem.
+func (bs *BlobStorage) ColumnIndices(root [32]byte) ([fieldparams.NumberOfColumns]bool, error) {
+	var mask [fieldparams.NumberOfColumns]bool
+	rootDir := blobNamer{root: root}.dir()
+	entries, err := afero.ReadDir(bs.fs, rootDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return mask, nil
+		}
+		return mask, err
+	}
+	for i := range entries {
+		if entries[i].IsDir() {
+			continue
+		}
+		name := entries[i].Name()
+		if !strings.HasSuffix(name, sszExt) {
+			continue
+		}
+		parts := strings.Split(name, ".")
+		if len(parts) != 2 {
+			continue
+		}
+		u, err := strconv.ParseUint(parts[0], 10, 64)
+		if err != nil {
+			return mask, errors.Wrapf(err, "unexpected directory entry breaks listing, %s", parts[0])
+		}
+		if u >= fieldparams.NumberOfColumns {
+			return mask, errIndexOutOfBounds
+		}
+		mask[u] = true
+	}
+	return mask, nil
+}
+
 // Clear deletes all files on the filesystem.
 func (bs *BlobStorage) Clear() error {
 	dirs, err := listDir(bs.fs, ".")
@@ -318,6 +462,10 @@ func namerForSidecar(sc blocks.VerifiedROBlob) blobNamer {
 	return blobNamer{root: sc.BlockRoot(), index: sc.Index}
 }
 
+func namerForDataColumn(col blocks.VerifiedRODataColumn) blobNamer {
+	return blobNamer{root: col.BlockRoot(), index: col.ColumnIndex}
+}
+
 func (p blobNamer) dir() string {
 	return rootString(p.root)
 }

beacon-chain/p2p/BUILD.bazel

@@ -46,6 +46,7 @@ go_library(
         "//beacon-chain/core/altair:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/p2p/encoder:go_default_library",
@@ -56,6 +57,7 @@ go_library(
         "//beacon-chain/startup:go_default_library",
         "//cmd/beacon-chain/flags:go_default_library",
         "//config/features:go_default_library",
+        "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//consensus-types/wrapper:go_default_library",

beacon-chain/p2p/broadcaster.go

@@ -11,6 +11,7 @@ import (
 	ssz "github.com/prysmaticlabs/fastssz"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/altair"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/crypto/hash"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing"
@@ -96,7 +97,12 @@ func (s *Service) BroadcastSyncCommitteeMessage(ctx context.Context, subnet uint
 	return nil
 }
 
-func (s *Service) internalBroadcastAttestation(ctx context.Context, subnet uint64, att *ethpb.Attestation, forkDigest [4]byte) {
+func (s *Service) internalBroadcastAttestation(
+	ctx context.Context,
+	subnet uint64,
+	att *ethpb.Attestation,
+	forkDigest [fieldparams.VersionLength]byte,
+) {
 	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastAttestation")
 	defer span.End()
 	ctx = trace.NewContext(context.Background(), span) // clear parent context / deadline.
@@ -152,7 +158,7 @@ func (s *Service) internalBroadcastAttestation(ctx context.Context, subnet uint6
 	}
 }
 
-func (s *Service) broadcastSyncCommittee(ctx context.Context, subnet uint64, sMsg *ethpb.SyncCommitteeMessage, forkDigest [4]byte) {
+func (s *Service) broadcastSyncCommittee(ctx context.Context, subnet uint64, sMsg *ethpb.SyncCommitteeMessage, forkDigest [fieldparams.VersionLength]byte) {
 	_, span := trace.StartSpan(ctx, "p2p.broadcastSyncCommittee")
 	defer span.End()
 	ctx = trace.NewContext(context.Background(), span) // clear parent context / deadline.
@@ -228,7 +234,12 @@ func (s *Service) BroadcastBlob(ctx context.Context, subnet uint64, blob *ethpb.
 	return nil
 }
 
-func (s *Service) internalBroadcastBlob(ctx context.Context, subnet uint64, blobSidecar *ethpb.BlobSidecar, forkDigest [4]byte) {
+func (s *Service) internalBroadcastBlob(
+	ctx context.Context,
+	subnet uint64,
+	blobSidecar *ethpb.BlobSidecar,
+	forkDigest [fieldparams.VersionLength]byte,
+) {
 	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastBlob")
 	defer span.End()
 	ctx = trace.NewContext(context.Background(), span) // clear parent context / deadline.
@@ -243,7 +254,7 @@ func (s *Service) internalBroadcastBlob(ctx context.Context, subnet uint64, blob
 	s.subnetLocker(wrappedSubIdx).RUnlock()
 
 	if !hasPeer {
-		blobSidecarCommitteeBroadcastAttempts.Inc()
+		blobSidecarBroadcastAttempts.Inc()
 		if err := func() error {
 			s.subnetLocker(wrappedSubIdx).Lock()
 			defer s.subnetLocker(wrappedSubIdx).Unlock()
@@ -252,7 +263,7 @@ func (s *Service) internalBroadcastBlob(ctx context.Context, subnet uint64, blob
 				return err
 			}
 			if ok {
-				blobSidecarCommitteeBroadcasts.Inc()
+				blobSidecarBroadcasts.Inc()
 				return nil
 			}
 			return errors.New("failed to find peers for subnet")
@@ -268,6 +279,99 @@ func (s *Service) internalBroadcastBlob(ctx context.Context, subnet uint64, blob
 	}
 }
 
+// BroadcastDataColumn broadcasts a data column to the p2p network, the message is assumed to be
+// broadcasted to the current fork and to the input column subnet.
+// TODO: Add tests
+func (s *Service) BroadcastDataColumn(ctx context.Context, columnSubnet uint64, dataColumnSidecar *ethpb.DataColumnSidecar) error {
+	// Add tracing to the function.
+	ctx, span := trace.StartSpan(ctx, "p2p.BroadcastBlob")
+	defer span.End()
+
+	// Ensure the data column sidecar is not nil.
+	if dataColumnSidecar == nil {
+		return errors.New("attempted to broadcast nil data column sidecar")
+	}
+
+	// Retrieve the current fork digest.
+	forkDigest, err := s.currentForkDigest()
+	if err != nil {
+		err := errors.Wrap(err, "current fork digest")
+		tracing.AnnotateError(span, err)
+		return err
+	}
+
+	// Non-blocking broadcast, with attempts to discover a column subnet peer if none available.
+	go s.internalBroadcastDataColumn(ctx, columnSubnet, dataColumnSidecar, forkDigest)
+
+	return nil
+}
+
+func (s *Service) internalBroadcastDataColumn(
+	ctx context.Context,
+	columnSubnet uint64,
+	dataColumnSidecar *ethpb.DataColumnSidecar,
+	forkDigest [fieldparams.VersionLength]byte,
+) {
+	// Add tracing to the function.
+	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastDataColumn")
+	defer span.End()
+
+	// Increase the number of broadcast attempts.
+	dataColumnSidecarBroadcastAttempts.Inc()
+
+	// Clear parent context / deadline.
+	ctx = trace.NewContext(context.Background(), span)
+
+	// Define a one-slot length context timeout.
+	oneSlot := time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second
+	ctx, cancel := context.WithTimeout(ctx, oneSlot)
+	defer cancel()
+
+	// Build the topic corresponding to this column subnet and this fork digest.
+	topic := dataColumnSubnetToTopic(columnSubnet, forkDigest)
+
+	// Compute the wrapped subnet index.
+	wrappedSubIdx := columnSubnet + dataColumnSubnetVal
+
+	// Check if we have peers with this subnet.
+	hasPeer := func() bool {
+		s.subnetLocker(wrappedSubIdx).RLock()
+		defer s.subnetLocker(wrappedSubIdx).RUnlock()
+
+		return s.hasPeerWithSubnet(topic)
+	}()
+
+	// If no peers are found, attempt to find peers with this subnet.
+	if !hasPeer {
+		if err := func() error {
+			s.subnetLocker(wrappedSubIdx).Lock()
+			defer s.subnetLocker(wrappedSubIdx).Unlock()
+
+			ok, err := s.FindPeersWithSubnet(ctx, topic, columnSubnet, 1 /*threshold*/)
+			if err != nil {
+				return errors.Wrap(err, "find peers for subnet")
+			}
+
+			if ok {
+				return nil
+			}
+			return errors.New("failed to find peers for subnet")
+		}(); err != nil {
+			log.WithError(err).Error("Failed to find peers")
+			tracing.AnnotateError(span, err)
+		}
+	}
+
+	// Broadcast the data column sidecar to the network.
+	if err := s.broadcastObject(ctx, dataColumnSidecar, topic); err != nil {
+		log.WithError(err).Error("Failed to broadcast blob sidecar")
+		tracing.AnnotateError(span, err)
+	}
+
+	// Increase the number of successful broadcasts.
+	blobSidecarBroadcasts.Inc()
+}
+
 // method to broadcast messages to other peers in our gossip mesh.
 func (s *Service) broadcastObject(ctx context.Context, obj ssz.Marshaler, topic string) error {
 	ctx, span := trace.StartSpan(ctx, "p2p.broadcastObject")
@@ -297,14 +401,18 @@ func (s *Service) broadcastObject(ctx context.Context, obj ssz.Marshaler, topic
 	return nil
 }
 
-func attestationToTopic(subnet uint64, forkDigest [4]byte) string {
+func attestationToTopic(subnet uint64, forkDigest [fieldparams.VersionLength]byte) string {
 	return fmt.Sprintf(AttestationSubnetTopicFormat, forkDigest, subnet)
 }
 
-func syncCommitteeToTopic(subnet uint64, forkDigest [4]byte) string {
+func syncCommitteeToTopic(subnet uint64, forkDigest [fieldparams.VersionLength]byte) string {
 	return fmt.Sprintf(SyncCommitteeSubnetTopicFormat, forkDigest, subnet)
 }
 
-func blobSubnetToTopic(subnet uint64, forkDigest [4]byte) string {
+func blobSubnetToTopic(subnet uint64, forkDigest [fieldparams.VersionLength]byte) string {
 	return fmt.Sprintf(BlobSubnetTopicFormat, forkDigest, subnet)
 }
+
+func dataColumnSubnetToTopic(subnet uint64, forkDigest [fieldparams.VersionLength]byte) string {
+	return fmt.Sprintf(DataColumnSubnetTopicFormat, forkDigest, subnet)
+}

beacon-chain/p2p/discovery.go

@@ -40,15 +40,21 @@ const (
 	udp6
 )
 
-type quicProtocol uint16
+type (
+	quicProtocol       uint16
+	custodySubnetCount uint64
+)
 
 // quicProtocol is the "quic" key, which holds the QUIC port of the node.
 func (quicProtocol) ENRKey() string { return "quic" }
 
-// RefreshENR uses an epoch to refresh the enr entry for our node
-// with the tracked committee ids for the epoch, allowing our node
-// to be dynamically discoverable by others given our tracked committee ids.
-func (s *Service) RefreshENR() {
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/p2p-interface.md#the-discovery-domain-discv5
+func (custodySubnetCount) ENRKey() string { return "custody_subnet_count" }
+
+// RefreshPersistentSubnets checks that we are tracking our local persistent subnets for a variety of gossip topics.
+// This routine checks for our attestation, sync committee and data column subnets and updates them if they have
+// been rotated.
+func (s *Service) RefreshPersistentSubnets() {
 	// return early if discv5 isnt running
 	if s.dv5Listener == nil || !s.isInitialized() {
 		return
@@ -58,6 +64,10 @@ func (s *Service) RefreshENR() {
 		log.WithError(err).Error("Could not initialize persistent subnets")
 		return
 	}
+	if err := initializePersistentColumnSubnets(s.dv5Listener.LocalNode().ID()); err != nil {
+		log.WithError(err).Error("Could not initialize persistent column subnets")
+		return
+	}
 
 	bitV := bitfield.NewBitvector64()
 	committees := cache.SubnetIDs.GetAllSubnets()
@@ -244,6 +254,11 @@ func (s *Service) createLocalNode(
 		localNode.Set(quicEntry)
 	}
 
+	if features.Get().EnablePeerDAS {
+		custodySubnetEntry := custodySubnetCount(params.BeaconConfig().CustodyRequirement)
+		localNode.Set(custodySubnetEntry)
+	}
+
 	localNode.SetFallbackIP(ipAddr)
 	localNode.SetFallbackUDP(udpPort)
 

beacon-chain/p2p/discovery_test.go

@@ -601,7 +601,7 @@ func TestRefreshENR_ForkBoundaries(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := tt.svcBuilder(t)
-			s.RefreshENR()
+			s.RefreshPersistentSubnets()
 			tt.postValidation(t, s)
 			s.dv5Listener.Close()
 			cache.SubnetIDs.EmptyAllCaches()

beacon-chain/p2p/gossip_topic_mappings.go

@@ -22,6 +22,7 @@ var gossipTopicMappings = map[string]proto.Message{
 	SyncCommitteeSubnetTopicFormat:            &ethpb.SyncCommitteeMessage{},
 	BlsToExecutionChangeSubnetTopicFormat:     &ethpb.SignedBLSToExecutionChange{},
 	BlobSubnetTopicFormat:                     &ethpb.BlobSidecar{},
+	DataColumnSubnetTopicFormat:               &ethpb.DataColumnSidecar{},
 }
 
 // GossipTopicMappings is a function to return the assigned data type

beacon-chain/p2p/interfaces.go

@@ -3,6 +3,7 @@ package p2p
 import (
 	"context"
 
+	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	"github.com/libp2p/go-libp2p/core/connmgr"
@@ -30,12 +31,18 @@ type P2P interface {
 	MetadataProvider
 }
 
+type Acceser interface {
+	Broadcaster
+	PeerManager
+}
+
 // Broadcaster broadcasts messages to peers over the p2p pubsub protocol.
 type Broadcaster interface {
 	Broadcast(context.Context, proto.Message) error
 	BroadcastAttestation(ctx context.Context, subnet uint64, att *ethpb.Attestation) error
 	BroadcastSyncCommitteeMessage(ctx context.Context, subnet uint64, sMsg *ethpb.SyncCommitteeMessage) error
 	BroadcastBlob(ctx context.Context, subnet uint64, blob *ethpb.BlobSidecar) error
+	BroadcastDataColumn(ctx context.Context, columnSubnet uint64, dataColumnSidecar *ethpb.DataColumnSidecar) error
 }
 
 // SetStreamHandler configures p2p to handle streams of a certain topic ID.
@@ -81,8 +88,9 @@ type PeerManager interface {
 	PeerID() peer.ID
 	Host() host.Host
 	ENR() *enr.Record
+	NodeID() enode.ID
 	DiscoveryAddresses() ([]multiaddr.Multiaddr, error)
-	RefreshENR()
+	RefreshPersistentSubnets()
 	FindPeersWithSubnet(ctx context.Context, topic string, subIndex uint64, threshold int) (bool, error)
 	AddPingMethod(reqFunc func(ctx context.Context, id peer.ID) error)
 }

beacon-chain/p2p/monitoring.go

@@ -60,17 +60,21 @@ var (
 			"the subnet. The beacon node increments this counter when the broadcast is blocked " +
 			"until a subnet peer can be found.",
 	})
-	blobSidecarCommitteeBroadcasts = promauto.NewCounter(prometheus.CounterOpts{
+	blobSidecarBroadcasts = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "p2p_blob_sidecar_committee_broadcasts",
-		Help: "The number of blob sidecar committee messages that were broadcast with no peer on.",
+		Help: "The number of blob sidecar messages that were broadcast with no peer on.",
 	})
 	syncCommitteeBroadcastAttempts = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "p2p_sync_committee_subnet_attempted_broadcasts",
 		Help: "The number of sync committee that were attempted to be broadcast.",
 	})
-	blobSidecarCommitteeBroadcastAttempts = promauto.NewCounter(prometheus.CounterOpts{
+	blobSidecarBroadcastAttempts = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "p2p_blob_sidecar_committee_attempted_broadcasts",
-		Help: "The number of blob sidecar committee messages that were attempted to be broadcast.",
+		Help: "The number of blob sidecar messages that were attempted to be broadcast.",
+	})
+	dataColumnSidecarBroadcastAttempts = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "p2p_data_column_sidecar_attempted_broadcasts",
+		Help: "The number of data column sidecar messages that were attempted to be broadcast.",
 	})
 
 	// Gossip Tracer Metrics

beacon-chain/p2p/pubsub.go

@@ -165,14 +165,14 @@ func (s *Service) pubsubOptions() []pubsub.Option {
 func parsePeersEnr(peers []string) ([]peer.AddrInfo, error) {
 	addrs, err := PeersFromStringAddrs(peers)
 	if err != nil {
-		return nil, fmt.Errorf("Cannot convert peers raw ENRs into multiaddresses: %v", err)
+		return nil, fmt.Errorf("cannot convert peers raw ENRs into multiaddresses: %v", err)
 	}
 	if len(addrs) == 0 {
-		return nil, fmt.Errorf("Converting peers raw ENRs into multiaddresses resulted in an empty list")
+		return nil, fmt.Errorf("converting peers raw ENRs into multiaddresses resulted in an empty list")
 	}
 	directAddrInfos, err := peer.AddrInfosFromP2pAddrs(addrs...)
 	if err != nil {
-		return nil, fmt.Errorf("Cannot convert peers multiaddresses into AddrInfos: %v", err)
+		return nil, fmt.Errorf("cannot convert peers multiaddresses into AddrInfos: %v", err)
 	}
 	return directAddrInfos, nil
 }

beacon-chain/p2p/pubsub_filter_test.go

@@ -90,7 +90,7 @@ func TestService_CanSubscribe(t *testing.T) {
 		formatting := []interface{}{digest}
 
 		// Special case for attestation subnets which have a second formatting placeholder.
-		if topic == AttestationSubnetTopicFormat || topic == SyncCommitteeSubnetTopicFormat || topic == BlobSubnetTopicFormat {
+		if topic == AttestationSubnetTopicFormat || topic == SyncCommitteeSubnetTopicFormat || topic == BlobSubnetTopicFormat || topic == DataColumnSubnetTopicFormat {
 			formatting = append(formatting, 0 /* some subnet ID */)
 		}
 

beacon-chain/p2p/rpc_topic_mappings.go

@@ -43,6 +43,9 @@ const BlobSidecarsByRangeName = "/blob_sidecars_by_range"
 // BlobSidecarsByRootName is the name for the BlobSidecarsByRoot v1 message topic.
 const BlobSidecarsByRootName = "/blob_sidecars_by_root"
 
+// DataColumnSidecarsByRootName is the name for the DataColumnSidecarsByRoot v1 message topic.
+const DataColumnSidecarsByRootName = "/data_column_sidecars_by_root"
+
 const (
 	// V1 RPC Topics
 	// RPCStatusTopicV1 defines the v1 topic for the status rpc method.
@@ -65,6 +68,9 @@ const (
 	// RPCBlobSidecarsByRootTopicV1 is a topic for requesting blob sidecars by their block root. New in deneb.
 	// /eth2/beacon_chain/req/blob_sidecars_by_root/1/
 	RPCBlobSidecarsByRootTopicV1 = protocolPrefix + BlobSidecarsByRootName + SchemaVersionV1
+	// RPCDataColumnSidecarsByRootTopicV1 is a topic for requesting data column sidecars by their block root. New in PeerDAS.
+	// /eth2/beacon_chain/req/data_column_sidecars_by_root/1
+	RPCDataColumnSidecarsByRootTopicV1 = protocolPrefix + DataColumnSidecarsByRootName + SchemaVersionV1
 
 	// V2 RPC Topics
 	// RPCBlocksByRangeTopicV2 defines v2 the topic for the blocks by range rpc method.

beacon-chain/p2p/service.go

@@ -226,7 +226,7 @@ func (s *Service) Start() {
 	}
 	// Initialize metadata according to the
 	// current epoch.
-	s.RefreshENR()
+	s.RefreshPersistentSubnets()
 
 	// Periodic functions.
 	async.RunEvery(s.ctx, params.BeaconConfig().TtfbTimeoutDuration(), func() {
@@ -234,7 +234,7 @@ func (s *Service) Start() {
 	})
 	async.RunEvery(s.ctx, 30*time.Minute, s.Peers().Prune)
 	async.RunEvery(s.ctx, time.Duration(params.BeaconConfig().RespTimeout)*time.Second, s.updateMetrics)
-	async.RunEvery(s.ctx, refreshRate, s.RefreshENR)
+	async.RunEvery(s.ctx, refreshRate, s.RefreshPersistentSubnets)
 	async.RunEvery(s.ctx, 1*time.Minute, func() {
 		inboundQUICCount := len(s.peers.InboundConnectedWithProtocol(peers.QUIC))
 		inboundTCPCount := len(s.peers.InboundConnectedWithProtocol(peers.TCP))
@@ -358,6 +358,15 @@ func (s *Service) ENR() *enr.Record {
 	return s.dv5Listener.Self().Record()
 }
 
+// NodeID returns the local node's node ID
+// for discovery.
+func (s *Service) NodeID() enode.ID {
+	if s.dv5Listener == nil {
+		return [32]byte{}
+	}
+	return s.dv5Listener.Self().ID()
+}
+
 // DiscoveryAddresses represents our enr addresses as multiaddresses.
 func (s *Service) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 	if s.dv5Listener == nil {

beacon-chain/p2p/subnets.go

@@ -13,6 +13,7 @@ import (
 	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas"
 	"github.com/prysmaticlabs/prysm/v5/cmd/beacon-chain/flags"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/wrapper"
@@ -34,8 +35,8 @@ var syncCommsSubnetEnrKey = params.BeaconNetworkConfig().SyncCommsSubnetKey
 // The value used with the subnet, inorder
 // to create an appropriate key to retrieve
 // the relevant lock. This is used to differentiate
-// sync subnets from attestation subnets. This is deliberately
-// chosen as more than 64(attestation subnet count).
+// sync subnets from others. This is deliberately
+// chosen as more than 64 (attestation subnet count).
 const syncLockerVal = 100
 
 // The value used with the blob sidecar subnet, in order
@@ -45,6 +46,13 @@ const syncLockerVal = 100
 // chosen more than sync and attestation subnet combined.
 const blobSubnetLockerVal = 110
 
+// The value used with the data column sidecar subnet, in order
+// to create an appropriate key to retrieve
+// the relevant lock. This is used to differentiate
+// data column subnets from others. This is deliberately
+// chosen more than sync, attestation and blob subnet (6) combined.
+const dataColumnSubnetVal = 150
+
 // FindPeersWithSubnet performs a network search for peers
 // subscribed to a particular subnet. Then it tries to connect
 // with those peers. This method will block until either:
@@ -202,6 +210,25 @@ func initializePersistentSubnets(id enode.ID, epoch primitives.Epoch) error {
 	return nil
 }
 
+func initializePersistentColumnSubnets(id enode.ID) error {
+	_, ok, expTime := cache.ColumnSubnetIDs.GetColumnSubnets()
+	if ok && expTime.After(time.Now()) {
+		return nil
+	}
+	subsMap, err := peerdas.CustodyColumnSubnets(id, params.BeaconConfig().CustodyRequirement)
+	if err != nil {
+		return err
+	}
+
+	subs := make([]uint64, 0, len(subsMap))
+	for sub := range subsMap {
+		subs = append(subs, sub)
+	}
+
+	cache.ColumnSubnetIDs.AddColumnSubnets(subs)
+	return nil
+}
+
 // Spec pseudocode definition:
 //
 // def compute_subscribed_subnets(node_id: NodeID, epoch: Epoch) -> Sequence[SubnetID]:
@@ -351,10 +378,11 @@ func syncBitvector(record *enr.Record) (bitfield.Bitvector4, error) {
 
 // The subnet locker is a map which keeps track of all
 // mutexes stored per subnet. This locker is re-used
-// between both the attestation and sync subnets. In
-// order to differentiate between attestation and sync
-// subnets. Sync subnets are stored by (subnet+syncLockerVal). This
-// is to prevent conflicts while allowing both subnets
+// between both the attestation, sync and blob subnets.
+// Sync subnets are stored by (subnet+syncLockerVal).
+// Blob subnets are stored by (subnet+blobSubnetLockerVal).
+// Data column subnets are stored by (subnet+dataColumnSubnetVal).
+// This is to prevent conflicts while allowing subnets
 // to use a single locker.
 func (s *Service) subnetLocker(i uint64) *sync.RWMutex {
 	s.subnetsLockLock.Lock()

beacon-chain/p2p/testing/fuzz_p2p.go

@@ -3,6 +3,7 @@ package testing
 import (
 	"context"
 
+	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	"github.com/libp2p/go-libp2p/core/control"
@@ -55,6 +56,11 @@ func (_ *FakeP2P) ENR() *enr.Record {
 	return new(enr.Record)
 }
 
+// NodeID returns the node id of the local peer.
+func (_ *FakeP2P) NodeID() enode.ID {
+	return [32]byte{}
+}
+
 // DiscoveryAddresses -- fake
 func (_ *FakeP2P) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 	return nil, nil
@@ -66,7 +72,7 @@ func (_ *FakeP2P) FindPeersWithSubnet(_ context.Context, _ string, _ uint64, _ i
 }
 
 // RefreshENR mocks the p2p func.
-func (_ *FakeP2P) RefreshENR() {}
+func (_ *FakeP2P) RefreshPersistentSubnets() {}
 
 // LeaveTopic -- fake.
 func (_ *FakeP2P) LeaveTopic(_ string) error {
@@ -148,6 +154,11 @@ func (_ *FakeP2P) BroadcastBlob(_ context.Context, _ uint64, _ *ethpb.BlobSideca
 	return nil
 }
 
+// BroadcastDataColumn -- fake.
+func (_ *FakeP2P) BroadcastDataColumn(_ context.Context, _ uint64, _ *ethpb.DataColumnSidecar) error {
+	return nil
+}
+
 // InterceptPeerDial -- fake.
 func (_ *FakeP2P) InterceptPeerDial(peer.ID) (allow bool) {
 	return true

beacon-chain/p2p/testing/mock_broadcaster.go

@@ -48,6 +48,12 @@ func (m *MockBroadcaster) BroadcastBlob(context.Context, uint64, *ethpb.BlobSide
 	return nil
 }
 
+// BroadcastDataColumn broadcasts a data column for mock.
+func (m *MockBroadcaster) BroadcastDataColumn(context.Context, uint64, *ethpb.DataColumnSidecar) error {
+	m.BroadcastCalled.Store(true)
+	return nil
+}
+
 // NumMessages returns the number of messages broadcasted.
 func (m *MockBroadcaster) NumMessages() int {
 	m.msgLock.Lock()

beacon-chain/p2p/testing/mock_peermanager.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 
+	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/libp2p/go-libp2p/core/host"
 	"github.com/libp2p/go-libp2p/core/peer"
@@ -39,6 +40,11 @@ func (m MockPeerManager) ENR() *enr.Record {
 	return m.Enr
 }
 
+// NodeID .
+func (m MockPeerManager) NodeID() enode.ID {
+	return [32]byte{}
+}
+
 // DiscoveryAddresses .
 func (m MockPeerManager) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 	if m.FailDiscoveryAddr {
@@ -48,7 +54,7 @@ func (m MockPeerManager) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 }
 
 // RefreshENR .
-func (_ MockPeerManager) RefreshENR() {}
+func (_ MockPeerManager) RefreshPersistentSubnets() {}
 
 // FindPeersWithSubnet .
 func (_ MockPeerManager) FindPeersWithSubnet(_ context.Context, _ string, _ uint64, _ int) (bool, error) {

beacon-chain/p2p/testing/p2p.go

@@ -10,6 +10,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	core "github.com/libp2p/go-libp2p/core"
@@ -183,6 +184,12 @@ func (p *TestP2P) BroadcastBlob(context.Context, uint64, *ethpb.BlobSidecar) err
 	return nil
 }
 
+// BroadcastDataColumn broadcasts a data column for mock.
+func (p *TestP2P) BroadcastDataColumn(context.Context, uint64, *ethpb.DataColumnSidecar) error {
+	p.BroadcastCalled.Store(true)
+	return nil
+}
+
 // SetStreamHandler for RPC.
 func (p *TestP2P) SetStreamHandler(topic string, handler network.StreamHandler) {
 	p.BHost.SetStreamHandler(protocol.ID(topic), handler)
@@ -263,6 +270,11 @@ func (_ *TestP2P) ENR() *enr.Record {
 	return new(enr.Record)
 }
 
+// NodeID returns the node id of the local peer.
+func (_ *TestP2P) NodeID() enode.ID {
+	return [32]byte{}
+}
+
 // DiscoveryAddresses --
 func (_ *TestP2P) DiscoveryAddresses() ([]multiaddr.Multiaddr, error) {
 	return nil, nil
@@ -361,7 +373,7 @@ func (_ *TestP2P) FindPeersWithSubnet(_ context.Context, _ string, _ uint64, _ i
 }
 
 // RefreshENR mocks the p2p func.
-func (_ *TestP2P) RefreshENR() {}
+func (_ *TestP2P) RefreshPersistentSubnets() {}
 
 // ForkDigest mocks the p2p func.
 func (p *TestP2P) ForkDigest() ([4]byte, error) {

beacon-chain/p2p/topics.go

@@ -30,6 +30,9 @@ const (
 	GossipBlsToExecutionChangeMessage = "bls_to_execution_change"
 	// GossipBlobSidecarMessage is the name for the blob sidecar message type.
 	GossipBlobSidecarMessage = "blob_sidecar"
+	// GossipDataColumnSidecarMessage is the name for the data column sidecar message type.
+	GossipDataColumnSidecarMessage = "data_column_sidecar"
+
 	// Topic Formats
 	//
 	// AttestationSubnetTopicFormat is the topic format for the attestation subnet.
@@ -52,4 +55,6 @@ const (
 	BlsToExecutionChangeSubnetTopicFormat = GossipProtocolAndDigest + GossipBlsToExecutionChangeMessage
 	// BlobSubnetTopicFormat is the topic format for the blob subnet.
 	BlobSubnetTopicFormat = GossipProtocolAndDigest + GossipBlobSidecarMessage + "_%d"
+	// DataColumnSubnetTopicFormat is the topic format for the data column subnet.
+	DataColumnSubnetTopicFormat = GossipProtocolAndDigest + GossipDataColumnSidecarMessage + "_%d"
 )

beacon-chain/p2p/types/rpc_errors.go

@@ -9,10 +9,15 @@ var (
 	ErrInvalidSequenceNum     = errors.New("invalid sequence number provided")
 	ErrGeneric                = errors.New("internal service error")
 
-	ErrRateLimited         = errors.New("rate limited")
-	ErrIODeadline          = errors.New("i/o deadline exceeded")
-	ErrInvalidRequest      = errors.New("invalid range, step or count")
-	ErrBlobLTMinRequest    = errors.New("blob slot < minimum_request_epoch")
-	ErrMaxBlobReqExceeded  = errors.New("requested more than MAX_REQUEST_BLOB_SIDECARS")
+	ErrRateLimited      = errors.New("rate limited")
+	ErrIODeadline       = errors.New("i/o deadline exceeded")
+	ErrInvalidRequest   = errors.New("invalid range, step or count")
+	ErrBlobLTMinRequest = errors.New("blob epoch < minimum_request_epoch")
+
+	ErrDataColumnLTMinRequest   = errors.New("data column epoch < minimum_request_epoch")
+	ErrMaxBlobReqExceeded       = errors.New("requested more than MAX_REQUEST_BLOB_SIDECARS")
+	ErrMaxDataColumnReqExceeded = errors.New("requested more than MAX_REQUEST_DATA_COLUMN_SIDECARS")
+
 	ErrResourceUnavailable = errors.New("resource requested unavailable")
+	ErrInvalidColumnIndex  = errors.New("invalid column index requested")
 )

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

@@ -1,3 +1,5 @@
+# gazelle:ignore
+
 load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 
 go_library(
@@ -44,6 +46,7 @@ go_library(
         "//beacon-chain/core/feed/operation:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
@@ -88,6 +91,7 @@ go_library(
         "//runtime/version:go_default_library",
         "//time:go_default_library",
         "//time/slots:go_default_library",
+        "@com_github_ethereum_c_kzg_4844//bindings/go:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_golang_protobuf//ptypes/empty",
@@ -173,7 +177,6 @@ common_deps = [
     "@org_golang_google_protobuf//types/known/emptypb:go_default_library",
 ]
 
-# gazelle:ignore
 go_test(
     name = "go_default_test",
     timeout = "moderate",

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

@@ -7,6 +7,7 @@ import (
 	"sync"
 	"time"
 
+	cKzg4844 "github.com/ethereum/c-kzg-4844/bindings/go"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	emptypb "github.com/golang/protobuf/ptypes/empty"
@@ -18,9 +19,12 @@ import (
 	blockfeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/block"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/operation"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/db/kv"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v5/config/features"
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
@@ -251,7 +255,15 @@ func (vs *Server) BuildBlockParallel(ctx context.Context, sBlk interfaces.Signed
 }
 
 // ProposeBeaconBlock handles the proposal of beacon blocks.
+// TODO: Add tests
 func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSignedBeaconBlock) (*ethpb.ProposeResponse, error) {
+	var (
+		blobSidecars       []*ethpb.BlobSidecar
+		dataColumnSideCars []*ethpb.DataColumnSidecar
+	)
+
+	isPeerDASEnabled := features.Get().EnablePeerDAS
+
 	ctx, span := trace.StartSpan(ctx, "ProposerServer.ProposeBeaconBlock")
 	defer span.End()
 
@@ -264,14 +276,16 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 		return nil, status.Errorf(codes.InvalidArgument, "%s: %v", "decode block failed", err)
 	}
 
-	var sidecars []*ethpb.BlobSidecar
 	if block.IsBlinded() {
-		block, sidecars, err = vs.handleBlindedBlock(ctx, block)
+		block, blobSidecars, dataColumnSideCars, err = vs.handleBlindedBlock(ctx, block, isPeerDASEnabled)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "%s: %v", "handle blinded block", err)
+		}
 	} else {
-		sidecars, err = vs.handleUnblindedBlock(block, req)
-	}
-	if err != nil {
-		return nil, status.Errorf(codes.Internal, "%s: %v", "handle block failed", err)
+		blobSidecars, dataColumnSideCars, err = handleUnblidedBlock(block, req, isPeerDASEnabled)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "%s: %v", "handle unblided block", err)
+		}
 	}
 
 	root, err := block.Block().HashTreeRoot()
@@ -292,8 +306,14 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 		errChan <- nil
 	}()
 
-	if err := vs.broadcastAndReceiveBlobs(ctx, sidecars, root); err != nil {
-		return nil, status.Errorf(codes.Internal, "Could not broadcast/receive blobs: %v", err)
+	if isPeerDASEnabled {
+		if err := vs.broadcastAndReceiveDataColumns(ctx, dataColumnSideCars, root); err != nil {
+			return nil, status.Errorf(codes.Internal, "Could not broadcast/receive data columns: %v", err)
+		}
+	} else {
+		if err := vs.broadcastAndReceiveBlobs(ctx, blobSidecars, root); err != nil {
+			return nil, status.Errorf(codes.Internal, "Could not broadcast/receive blobs: %v", err)
+		}
 	}
 
 	wg.Wait()
@@ -305,47 +325,83 @@ func (vs *Server) ProposeBeaconBlock(ctx context.Context, req *ethpb.GenericSign
 }
 
 // handleBlindedBlock processes blinded beacon blocks.
-func (vs *Server) handleBlindedBlock(ctx context.Context, block interfaces.SignedBeaconBlock) (interfaces.SignedBeaconBlock, []*ethpb.BlobSidecar, error) {
+func (vs *Server) handleBlindedBlock(ctx context.Context, block interfaces.SignedBeaconBlock, isPeerDASEnabled bool) (interfaces.SignedBeaconBlock, []*ethpb.BlobSidecar, []*ethpb.DataColumnSidecar, error) {
 	if block.Version() < version.Bellatrix {
-		return nil, nil, errors.New("pre-Bellatrix blinded block")
+		return nil, nil, nil, errors.New("pre-Bellatrix blinded block")
 	}
+
 	if vs.BlockBuilder == nil || !vs.BlockBuilder.Configured() {
-		return nil, nil, errors.New("unconfigured block builder")
+		return nil, nil, nil, errors.New("unconfigured block builder")
 	}
 
 	copiedBlock, err := block.Copy()
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, nil, errors.Wrap(err, "block copy")
 	}
 
 	payload, bundle, err := vs.BlockBuilder.SubmitBlindedBlock(ctx, block)
 	if err != nil {
-		return nil, nil, errors.Wrap(err, "submit blinded block failed")
+		return nil, nil, nil, errors.Wrap(err, "submit blinded block")
 	}
 
 	if err := copiedBlock.Unblind(payload); err != nil {
-		return nil, nil, errors.Wrap(err, "unblind failed")
+		return nil, nil, nil, errors.Wrap(err, "unblind")
 	}
 
-	sidecars, err := unblindBlobsSidecars(copiedBlock, bundle)
+	if isPeerDASEnabled {
+		dataColumnSideCars, err := unblindDataColumnsSidecars(copiedBlock, bundle)
+		if err != nil {
+			return nil, nil, nil, errors.Wrap(err, "unblind data columns sidecars")
+		}
+
+		return copiedBlock, nil, dataColumnSideCars, nil
+	}
+
+	blobSidecars, err := unblindBlobsSidecars(copiedBlock, bundle)
 	if err != nil {
-		return nil, nil, errors.Wrap(err, "unblind sidecars failed")
+		return nil, nil, nil, errors.Wrap(err, "unblind blobs sidecars")
 	}
 
-	return copiedBlock, sidecars, nil
+	return copiedBlock, blobSidecars, nil, nil
 }
 
 // handleUnblindedBlock processes unblinded beacon blocks.
-func (vs *Server) handleUnblindedBlock(block interfaces.SignedBeaconBlock, req *ethpb.GenericSignedBeaconBlock) ([]*ethpb.BlobSidecar, error) {
+func handleUnblidedBlock(block interfaces.SignedBeaconBlock, req *ethpb.GenericSignedBeaconBlock, isPeerDASEnabled bool) ([]*ethpb.BlobSidecar, []*ethpb.DataColumnSidecar, error) {
 	dbBlockContents := req.GetDeneb()
+
 	if dbBlockContents == nil {
-		return nil, nil
+		return nil, nil, nil
 	}
-	return BuildBlobSidecars(block, dbBlockContents.Blobs, dbBlockContents.KzgProofs)
+
+	if isPeerDASEnabled {
+		// Convert blobs from slices to array.
+		blobs := make([]cKzg4844.Blob, 0, len(dbBlockContents.Blobs))
+		for _, blob := range dbBlockContents.Blobs {
+			if len(blob) != cKzg4844.BytesPerBlob {
+				return nil, nil, errors.Errorf("invalid blob size. expected %d bytes, got %d bytes", cKzg4844.BytesPerBlob, len(blob))
+			}
+
+			blobs = append(blobs, cKzg4844.Blob(blob))
+		}
+
+		dataColumnSideCars, err := peerdas.DataColumnSidecars(block, blobs)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "data column sidecars")
+		}
+
+		return nil, dataColumnSideCars, nil
+	}
+
+	blobSidecars, err := BuildBlobSidecars(block, dbBlockContents.Blobs, dbBlockContents.KzgProofs)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "build blob sidecars")
+	}
+
+	return blobSidecars, nil, nil
 }
 
 // broadcastReceiveBlock broadcasts a block and handles its reception.
-func (vs *Server) broadcastReceiveBlock(ctx context.Context, block interfaces.SignedBeaconBlock, root [32]byte) error {
+func (vs *Server) broadcastReceiveBlock(ctx context.Context, block interfaces.SignedBeaconBlock, root [fieldparams.RootLength]byte) error {
 	protoBlock, err := block.Proto()
 	if err != nil {
 		return errors.Wrap(err, "protobuf conversion failed")
@@ -361,7 +417,7 @@ func (vs *Server) broadcastReceiveBlock(ctx context.Context, block interfaces.Si
 }
 
 // broadcastAndReceiveBlobs handles the broadcasting and reception of blob sidecars.
-func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethpb.BlobSidecar, root [32]byte) error {
+func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethpb.BlobSidecar, root [fieldparams.RootLength]byte) error {
 	for i, sc := range sidecars {
 		if err := vs.P2P.BroadcastBlob(ctx, uint64(i), sc); err != nil {
 			return errors.Wrap(err, "broadcast blob failed")
@@ -371,10 +427,12 @@ func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethp
 		if err != nil {
 			return errors.Wrap(err, "ROBlob creation failed")
 		}
+
 		verifiedBlob := blocks.NewVerifiedROBlob(readOnlySc)
 		if err := vs.BlobReceiver.ReceiveBlob(ctx, verifiedBlob); err != nil {
 			return errors.Wrap(err, "receive blob failed")
 		}
+
 		vs.OperationNotifier.OperationFeed().Send(&feed.Event{
 			Type: operation.BlobSidecarReceived,
 			Data: &operation.BlobSidecarReceivedData{Blob: &verifiedBlob},
@@ -383,6 +441,31 @@ func (vs *Server) broadcastAndReceiveBlobs(ctx context.Context, sidecars []*ethp
 	return nil
 }
 
+// broadcastAndReceiveDataColumns handles the broadcasting and reception of data columns sidecars.
+func (vs *Server) broadcastAndReceiveDataColumns(ctx context.Context, sidecars []*ethpb.DataColumnSidecar, root [fieldparams.RootLength]byte) error {
+	for i, sidecar := range sidecars {
+		if err := vs.P2P.BroadcastDataColumn(ctx, uint64(i), sidecar); err != nil {
+			return errors.Wrap(err, "broadcast data column")
+		}
+
+		roDataColumn, err := blocks.NewRODataColumnWithRoot(sidecar, root)
+		if err != nil {
+			return errors.Wrap(err, "new read-only data column with root")
+		}
+
+		verifiedRODataColumn := blocks.NewVerifiedRODataColumn(roDataColumn)
+		if err := vs.DataColumnReceiver.ReceiveDataColumn(ctx, verifiedRODataColumn); err != nil {
+			return errors.Wrap(err, "receive data column")
+		}
+
+		vs.OperationNotifier.OperationFeed().Send(&feed.Event{
+			Type: operation.DataColumnSidecarReceived,
+			Data: &operation.DataColumnSidecarReceivedData{DataColumn: &verifiedRODataColumn},
+		})
+	}
+	return nil
+}
+
 // PrepareBeaconProposer caches and updates the fee recipient for the given proposer.
 func (vs *Server) PrepareBeaconProposer(
 	_ context.Context, request *ethpb.PrepareBeaconProposerRequest,

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

@@ -58,6 +58,13 @@ func (vs *Server) getLocalPayload(ctx context.Context, blk interfaces.ReadOnlyBe
 	slot := blk.Slot()
 	vIdx := blk.ProposerIndex()
 	headRoot := blk.ParentRoot()
+	var err error
+	if headRoot == [32]byte{} {
+		headRoot, err = vs.BeaconDB.GenesisBlockRoot(ctx)
+		if err != nil {
+			return nil, false, err
+		}
+	}
 	logFields := logrus.Fields{
 		"validatorIndex": vIdx,
 		"slot":           slot,
@@ -71,7 +78,6 @@ func (vs *Server) getLocalPayload(ctx context.Context, blk interfaces.ReadOnlyBe
 	}
 	setFeeRecipientIfBurnAddress(&val)
 
-	var err error
 	if ok && payloadId != [8]byte{} {
 		// Payload ID is cache hit. Return the cached payload ID.
 		var pid primitives.PayloadID

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

@@ -778,7 +778,7 @@ func TestProposer_ProposeBlock_OK(t *testing.T) {
 				return &ethpb.GenericSignedBeaconBlock{Block: blk}
 			},
 			useBuilder: true,
-			err:        "unblind sidecars failed: commitment value doesn't match block",
+			err:        "unblind blobs sidecars: commitment value doesn't match block",
 		},
 	}
 

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

@@ -67,6 +67,7 @@ type Server struct {
 	SyncCommitteePool      synccommittee.Pool
 	BlockReceiver          blockchain.BlockReceiver
 	BlobReceiver           blockchain.BlobReceiver
+	DataColumnReceiver     blockchain.DataColumnReceiver
 	MockEth1Votes          bool
 	Eth1BlockFetcher       execution.POWBlockFetcher
 	PendingDepositsFetcher depositcache.PendingDepositsFetcher

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

@@ -3,7 +3,10 @@ package validator
 import (
 	"bytes"
 
+	cKzg4844 "github.com/ethereum/c-kzg-4844/bindings/go"
+
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas"
 	consensusblocks "github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
@@ -68,3 +71,29 @@ func unblindBlobsSidecars(block interfaces.SignedBeaconBlock, bundle *enginev1.B
 	}
 	return sidecars, nil
 }
+
+// TODO: Add tests
+func unblindDataColumnsSidecars(block interfaces.SignedBeaconBlock, bundle *enginev1.BlobsBundle) ([]*ethpb.DataColumnSidecar, error) {
+	// Check if the block is at least a Deneb block.
+	if block.Version() < version.Deneb {
+		return nil, nil
+	}
+
+	// Convert blobs from slices to array.
+	blobs := make([]cKzg4844.Blob, 0, len(bundle.Blobs))
+	for _, blob := range bundle.Blobs {
+		if len(blob) != cKzg4844.BytesPerBlob {
+			return nil, errors.Errorf("invalid blob size. expected %d bytes, got %d bytes", cKzg4844.BytesPerBlob, len(blob))
+		}
+
+		blobs = append(blobs, cKzg4844.Blob(blob))
+	}
+
+	// Retrieve data columns from blobs.
+	dataColumnSidecars, err := peerdas.DataColumnSidecars(block, blobs)
+	if err != nil {
+		return nil, errors.Wrap(err, "data column sidecars")
+	}
+
+	return dataColumnSidecars, nil
+}

beacon-chain/sync/BUILD.bazel

@@ -25,6 +25,7 @@ go_library(
         "rpc_blob_sidecars_by_range.go",
         "rpc_blob_sidecars_by_root.go",
         "rpc_chunked_response.go",
+        "rpc_data_column_sidecars_by_root.go",
         "rpc_goodbye.go",
         "rpc_metadata.go",
         "rpc_ping.go",
@@ -37,6 +38,7 @@ go_library(
         "subscriber_beacon_blocks.go",
         "subscriber_blob_sidecar.go",
         "subscriber_bls_to_execution_change.go",
+        "subscriber_data_column_sidecar.go",
         "subscriber_handlers.go",
         "subscriber_sync_committee_message.go",
         "subscriber_sync_contribution_proof.go",
@@ -47,6 +49,7 @@ go_library(
         "validate_beacon_blocks.go",
         "validate_blob.go",
         "validate_bls_to_execution_change.go",
+        "validate_data_column.go",
         "validate_proposer_slashing.go",
         "validate_sync_committee_message.go",
         "validate_sync_contribution_proof.go",
@@ -71,6 +74,7 @@ go_library(
         "//beacon-chain/core/feed/operation:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
         "//beacon-chain/core/transition/interop:go_default_library",

beacon-chain/sync/decode_pubsub.go

@@ -39,6 +39,8 @@ func (s *Service) decodePubsubMessage(msg *pubsub.Message) (ssz.Unmarshaler, err
 		topic = p2p.GossipTypeMapping[reflect.TypeOf(&ethpb.SyncCommitteeMessage{})]
 	case strings.Contains(topic, p2p.GossipBlobSidecarMessage):
 		topic = p2p.GossipTypeMapping[reflect.TypeOf(&ethpb.BlobSidecar{})]
+	case strings.Contains(topic, p2p.GossipDataColumnSidecarMessage):
+		topic = p2p.GossipTypeMapping[reflect.TypeOf(&ethpb.DataColumnSidecar{})]
 	}
 
 	base := p2p.GossipTopicMappings(topic, 0)

beacon-chain/sync/rpc.go

@@ -13,6 +13,7 @@ import (
 	ssz "github.com/prysmaticlabs/fastssz"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p"
 	p2ptypes "github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p/types"
+	"github.com/prysmaticlabs/prysm/v5/config/features"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
@@ -98,6 +99,13 @@ func (s *Service) registerRPCHandlersAltair() {
 }
 
 func (s *Service) registerRPCHandlersDeneb() {
+	if features.Get().EnablePeerDAS {
+		s.registerRPC(
+			p2p.RPCDataColumnSidecarsByRootTopicV1,
+			s.dataColumnSidecarByRootRPCHandler,
+		)
+		return
+	}
 	s.registerRPC(
 		p2p.RPCBlobSidecarsByRangeTopicV1,
 		s.blobSidecarsByRangeRPCHandler,

beacon-chain/sync/rpc_chunked_response.go

@@ -13,6 +13,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/network/forks"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
 )
@@ -175,3 +176,22 @@ func WriteBlobSidecarChunk(stream libp2pcore.Stream, tor blockchain.TemporalOrac
 	_, err = encoding.EncodeWithMaxLength(stream, sidecar)
 	return err
 }
+
+// WriteDataColumnSidecarChunk writes data column chunk object to stream.
+// response_chunk  ::= <result> | <context-bytes> | <encoding-dependent-header> | <encoded-payload>
+func WriteDataColumnSidecarChunk(stream libp2pcore.Stream, tor blockchain.TemporalOracle, encoding encoder.NetworkEncoding, sidecar *ethpb.DataColumnSidecar) error {
+	if _, err := stream.Write([]byte{responseCodeSuccess}); err != nil {
+		return err
+	}
+	valRoot := tor.GenesisValidatorsRoot()
+	ctxBytes, err := forks.ForkDigestFromEpoch(slots.ToEpoch(sidecar.SignedBlockHeader.Header.Slot), valRoot[:])
+	if err != nil {
+		return err
+	}
+
+	if err := writeContextToStream(ctxBytes[:], stream); err != nil {
+		return err
+	}
+	_, err = encoding.EncodeWithMaxLength(stream, sidecar)
+	return err
+}

beacon-chain/sync/rpc_data_column_sidecars_by_root.go

@@ -0,0 +1,149 @@
+package sync
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"sort"
+	"time"
+
+	libp2pcore "github.com/libp2p/go-libp2p/core"
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/db"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p/types"
+	"github.com/prysmaticlabs/prysm/v5/cmd/beacon-chain/flags"
+	"github.com/prysmaticlabs/prysm/v5/config/features"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
+	"github.com/sirupsen/logrus"
+	"go.opencensus.io/trace"
+)
+
+func (s *Service) dataColumnSidecarByRootRPCHandler(ctx context.Context, msg interface{}, stream libp2pcore.Stream) error {
+	ctx, span := trace.StartSpan(ctx, "sync.dataColumnSidecarByRootRPCHandler")
+	defer span.End()
+	ctx, cancel := context.WithTimeout(ctx, ttfbTimeout)
+	defer cancel()
+	SetRPCStreamDeadlines(stream)
+	log := log.WithField("handler", p2p.DataColumnSidecarsByRootName[1:]) // slice the leading slash off the name var
+	// We use the same type as for blobs as they are the same data structure.
+	// TODO: Make the type naming more generic to be extensible to data columns
+	ref, ok := msg.(*types.BlobSidecarsByRootReq)
+	if !ok {
+		return errors.New("message is not type BlobSidecarsByRootReq")
+	}
+
+	columnIdents := *ref
+	if err := validateDataColummnsByRootRequest(columnIdents); err != nil {
+		s.cfg.p2p.Peers().Scorers().BadResponsesScorer().Increment(stream.Conn().RemotePeer())
+		s.writeErrorResponseToStream(responseCodeInvalidRequest, err.Error(), stream)
+		return err
+	}
+	// Sort the identifiers so that requests for the same blob root will be adjacent, minimizing db lookups.
+	sort.Sort(columnIdents)
+
+	// TODO: Customize data column batches too
+	batchSize := flags.Get().BlobBatchLimit
+	var ticker *time.Ticker
+	if len(columnIdents) > batchSize {
+		ticker = time.NewTicker(time.Second)
+	}
+
+	// Compute the oldest slot we'll allow a peer to request, based on the current slot.
+	cs := s.cfg.clock.CurrentSlot()
+	minReqSlot, err := DataColumnsRPCMinValidSlot(cs)
+	if err != nil {
+		return errors.Wrapf(err, "unexpected error computing min valid blob request slot, current_slot=%d", cs)
+	}
+
+	// Compute all custodied columns.
+	custodiedColumns, err := peerdas.CustodyColumns(s.cfg.p2p.NodeID(), params.BeaconConfig().CustodyRequirement)
+	if err != nil {
+		log.WithError(err).Errorf("unexpected error retrieving the node id")
+		s.writeErrorResponseToStream(responseCodeServerError, types.ErrGeneric.Error(), stream)
+		return err
+	}
+
+	for i := range columnIdents {
+		if err := ctx.Err(); err != nil {
+			closeStream(stream, log)
+			return err
+		}
+
+		// Throttle request processing to no more than batchSize/sec.
+		if ticker != nil && i != 0 && i%batchSize == 0 {
+			<-ticker.C
+		}
+		s.rateLimiter.add(stream, 1)
+		root, idx := bytesutil.ToBytes32(columnIdents[i].BlockRoot), columnIdents[i].Index
+
+		isCustodied := custodiedColumns[idx]
+		if !isCustodied {
+			s.cfg.p2p.Peers().Scorers().BadResponsesScorer().Increment(stream.Conn().RemotePeer())
+			s.writeErrorResponseToStream(responseCodeInvalidRequest, types.ErrInvalidColumnIndex.Error(), stream)
+			return types.ErrInvalidColumnIndex
+		}
+
+		// TODO: Differentiate between blobs and columns for our storage engine
+		sc, err := s.cfg.blobStorage.GetColumn(root, idx)
+		if err != nil {
+			if db.IsNotFound(err) {
+				log.WithError(err).WithFields(logrus.Fields{
+					"root":  fmt.Sprintf("%#x", root),
+					"index": idx,
+				}).Debugf("Peer requested data column sidecar by root not found in db")
+				continue
+			}
+			log.WithError(err).Errorf("unexpected db error retrieving data column, root=%x, index=%d", root, idx)
+			s.writeErrorResponseToStream(responseCodeServerError, types.ErrGeneric.Error(), stream)
+			return err
+		}
+
+		// If any root in the request content references a block earlier than minimum_request_epoch,
+		// peers MAY respond with error code 3: ResourceUnavailable or not include the data column in the response.
+		// note: we are deviating from the spec to allow requests for data column that are before minimum_request_epoch,
+		// up to the beginning of the retention period.
+		if sc.SignedBlockHeader.Header.Slot < minReqSlot {
+			s.writeErrorResponseToStream(responseCodeResourceUnavailable, types.ErrDataColumnLTMinRequest.Error(), stream)
+			log.WithError(types.ErrDataColumnLTMinRequest).
+				Debugf("requested data column for block %#x before minimum_request_epoch", columnIdents[i].BlockRoot)
+			return types.ErrDataColumnLTMinRequest
+		}
+
+		SetStreamWriteDeadline(stream, defaultWriteDuration)
+		if chunkErr := WriteDataColumnSidecarChunk(stream, s.cfg.chain, s.cfg.p2p.Encoding(), sc); chunkErr != nil {
+			log.WithError(chunkErr).Debug("Could not send a chunked response")
+			s.writeErrorResponseToStream(responseCodeServerError, types.ErrGeneric.Error(), stream)
+			tracing.AnnotateError(span, chunkErr)
+			return chunkErr
+		}
+	}
+	closeStream(stream, log)
+	return nil
+}
+
+func validateDataColummnsByRootRequest(colIdents types.BlobSidecarsByRootReq) error {
+	if uint64(len(colIdents)) > params.BeaconConfig().MaxRequestDataColumnSidecars {
+		return types.ErrMaxDataColumnReqExceeded
+	}
+	return nil
+}
+
+func DataColumnsRPCMinValidSlot(current primitives.Slot) (primitives.Slot, error) {
+	// Avoid overflow if we're running on a config where deneb is set to far future epoch.
+	if params.BeaconConfig().DenebForkEpoch == math.MaxUint64 || !features.Get().EnablePeerDAS {
+		return primitives.Slot(math.MaxUint64), nil
+	}
+	minReqEpochs := params.BeaconConfig().MinEpochsForDataColumnSidecarsRequest
+	currEpoch := slots.ToEpoch(current)
+	minStart := params.BeaconConfig().DenebForkEpoch
+	if currEpoch > minReqEpochs && currEpoch-minReqEpochs > minStart {
+		minStart = currEpoch - minReqEpochs
+	}
+	return slots.EpochStart(minStart)
+}

beacon-chain/sync/rpc_send_request.go

@@ -208,6 +208,29 @@ func SendBlobSidecarByRoot(
 	return readChunkEncodedBlobs(stream, p2pApi.Encoding(), ctxMap, blobValidatorFromRootReq(req), max)
 }
 
+func SendDataColumnSidecarByRoot(
+	ctx context.Context, tor blockchain.TemporalOracle, p2pApi p2p.P2P, pid peer.ID,
+	ctxMap ContextByteVersions, req *p2ptypes.BlobSidecarsByRootReq,
+) ([]blocks.ROBlob, error) {
+	if uint64(len(*req)) > params.BeaconConfig().MaxRequestDataColumnSidecars {
+		return nil, errors.Wrapf(p2ptypes.ErrMaxDataColumnReqExceeded, "length=%d", len(*req))
+	}
+
+	topic, err := p2p.TopicFromMessage(p2p.DataColumnSidecarsByRootName, slots.ToEpoch(tor.CurrentSlot()))
+	if err != nil {
+		return nil, err
+	}
+	log.WithField("topic", topic).Debug("Sending data column sidecar request")
+	stream, err := p2pApi.Send(ctx, req, topic, pid)
+	if err != nil {
+		return nil, err
+	}
+	defer closeStream(stream, log)
+
+	maxCol := params.BeaconConfig().MaxRequestDataColumnSidecars
+	return readChunkEncodedBlobs(stream, p2pApi.Encoding(), ctxMap, blobValidatorFromRootReq(req), maxCol)
+}
+
 // BlobResponseValidation represents a function that can validate aspects of a single unmarshaled blob
 // that was received from a peer in response to an rpc request.
 type BlobResponseValidation func(blocks.ROBlob) error

beacon-chain/sync/service.go

@@ -51,7 +51,8 @@ var _ runtime.Service = (*Service)(nil)
 
 const rangeLimit uint64 = 1024
 const seenBlockSize = 1000
-const seenBlobSize = seenBlockSize * 4 // Each block can have max 4 blobs. Worst case 164kB for cache.
+const seenBlobSize = seenBlockSize * 6         // Each block can have max 6 blobs.
+const seenDataColumnSize = seenBlockSize * 128 // Each block can have max 128 data columns.
 const seenUnaggregatedAttSize = 20000
 const seenAggregatedAttSize = 16384
 const seenSyncMsgSize = 1000         // Maximum of 512 sync committee members, 1000 is a safe amount.
@@ -102,6 +103,7 @@ type config struct {
 type blockchainService interface {
 	blockchain.BlockReceiver
 	blockchain.BlobReceiver
+	blockchain.DataColumnReceiver
 	blockchain.HeadFetcher
 	blockchain.FinalizationFetcher
 	blockchain.ForkFetcher
@@ -133,6 +135,8 @@ type Service struct {
 	seenBlockCache                   *lru.Cache
 	seenBlobLock                     sync.RWMutex
 	seenBlobCache                    *lru.Cache
+	seenDataColumnLock               sync.RWMutex
+	seenDataColumnCache              *lru.Cache
 	seenAggregatedAttestationLock    sync.RWMutex
 	seenAggregatedAttestationCache   *lru.Cache
 	seenUnAggregatedAttestationLock  sync.RWMutex
@@ -276,6 +280,7 @@ func (s *Service) Status() error {
 func (s *Service) initCaches() {
 	s.seenBlockCache = lruwrpr.New(seenBlockSize)
 	s.seenBlobCache = lruwrpr.New(seenBlobSize)
+	s.seenDataColumnCache = lruwrpr.New(seenDataColumnSize)
 	s.seenAggregatedAttestationCache = lruwrpr.New(seenAggregatedAttSize)
 	s.seenUnAggregatedAttestationCache = lruwrpr.New(seenUnaggregatedAttSize)
 	s.seenSyncMessageCache = lruwrpr.New(seenSyncMsgSize)

beacon-chain/sync/subscriber.go

@@ -137,13 +137,32 @@ func (s *Service) registerSubscribers(epoch primitives.Epoch, digest [4]byte) {
 
 	// New Gossip Topic in Deneb
 	if epoch >= params.BeaconConfig().DenebForkEpoch {
-		s.subscribeStaticWithSubnets(
-			p2p.BlobSubnetTopicFormat,
-			s.validateBlob,   /* validator */
-			s.blobSubscriber, /* message handler */
-			digest,
-			params.BeaconConfig().BlobsidecarSubnetCount,
-		)
+		if features.Get().EnablePeerDAS {
+			if flags.Get().SubscribeToAllSubnets {
+				s.subscribeStaticWithSubnets(
+					p2p.DataColumnSubnetTopicFormat,
+					s.validateDataColumn,   /* validator */
+					s.dataColumnSubscriber, /* message handler */
+					digest,
+					params.BeaconConfig().DataColumnSidecarSubnetCount,
+				)
+			} else {
+				s.subscribeDynamicWithColumnSubnets(
+					p2p.DataColumnSubnetTopicFormat,
+					s.validateDataColumn,   /* validator */
+					s.dataColumnSubscriber, /* message handler */
+					digest,
+				)
+			}
+		} else {
+			s.subscribeStaticWithSubnets(
+				p2p.BlobSubnetTopicFormat,
+				s.validateBlob,   /* validator */
+				s.blobSubscriber, /* message handler */
+				digest,
+				params.BeaconConfig().BlobsidecarSubnetCount,
+			)
+		}
 	}
 }
 
@@ -646,6 +665,87 @@ func (s *Service) subscribeDynamicWithSyncSubnets(
 	}()
 }
 
+// subscribe missing subnets for our persistent columns.
+func (s *Service) subscribeColumnSubnet(
+	subscriptions map[uint64]*pubsub.Subscription,
+	idx uint64,
+	digest [4]byte,
+	validate wrappedVal,
+	handle subHandler,
+) {
+	// do not subscribe if we have no peers in the same
+	// subnet
+	topic := p2p.GossipTypeMapping[reflect.TypeOf(&ethpb.DataColumnSidecar{})]
+	subnetTopic := fmt.Sprintf(topic, digest, idx)
+	// check if subscription exists and if not subscribe the relevant subnet.
+	if _, exists := subscriptions[idx]; !exists {
+		subscriptions[idx] = s.subscribeWithBase(subnetTopic, validate, handle)
+	}
+	if !s.validPeersExist(subnetTopic) {
+		log.Debugf("No peers found subscribed to column gossip subnet with "+
+			"column index %d. Searching network for peers subscribed to the subnet.", idx)
+		_, err := s.cfg.p2p.FindPeersWithSubnet(s.ctx, subnetTopic, idx, flags.Get().MinimumPeersPerSubnet)
+		if err != nil {
+			log.WithError(err).Debug("Could not search for peers")
+		}
+	}
+}
+
+func (s *Service) subscribeDynamicWithColumnSubnets(
+	topicFormat string,
+	validate wrappedVal,
+	handle subHandler,
+	digest [4]byte,
+) {
+	genRoot := s.cfg.clock.GenesisValidatorsRoot()
+	_, e, err := forks.RetrieveForkDataFromDigest(digest, genRoot[:])
+	if err != nil {
+		panic(err)
+	}
+	base := p2p.GossipTopicMappings(topicFormat, e)
+	if base == nil {
+		panic(fmt.Sprintf("%s is not mapped to any message in GossipTopicMappings", topicFormat))
+	}
+	subscriptions := make(map[uint64]*pubsub.Subscription, params.BeaconConfig().DataColumnSidecarSubnetCount)
+	genesis := s.cfg.clock.GenesisTime()
+	ticker := slots.NewSlotTicker(genesis, params.BeaconConfig().SecondsPerSlot)
+
+	go func() {
+		for {
+			select {
+			case <-s.ctx.Done():
+				ticker.Done()
+				return
+			case <-ticker.C():
+				if s.chainStarted.IsSet() && s.cfg.initialSync.Syncing() {
+					continue
+				}
+				valid, err := isDigestValid(digest, genesis, genRoot)
+				if err != nil {
+					log.Error(err)
+					continue
+				}
+				if !valid {
+					log.Warnf("Column subnets with digest %#x are no longer valid, unsubscribing from all of them.", digest)
+					// Unsubscribes from all our current subnets.
+					s.reValidateSubscriptions(subscriptions, []uint64{}, topicFormat, digest)
+					ticker.Done()
+					return
+				}
+
+				wantedSubs := s.retrieveActiveColumnSubnets()
+				// Resize as appropriate.
+				s.reValidateSubscriptions(subscriptions, wantedSubs, topicFormat, digest)
+
+				// subscribe desired column subnets.
+				for _, idx := range wantedSubs {
+					s.subscribeColumnSubnet(subscriptions, idx, digest, validate, handle)
+				}
+			}
+		}
+	}()
+}
+
 // lookup peers for attester specific subnets.
 func (s *Service) lookupAttesterSubnets(digest [4]byte, idx uint64) {
 	topic := p2p.GossipTypeMapping[reflect.TypeOf(&ethpb.Attestation{})]
@@ -697,6 +797,14 @@ func (*Service) retrieveActiveSyncSubnets(currEpoch primitives.Epoch) []uint64 {
 	return slice.SetUint64(subs)
 }
 
+func (*Service) retrieveActiveColumnSubnets() []uint64 {
+	subs, ok, _ := cache.ColumnSubnetIDs.GetColumnSubnets()
+	if !ok {
+		return nil
+	}
+	return subs
+}
+
 // filters out required peers for the node to function, not
 // pruning peers who are in our attestation subnets.
 func (s *Service) filterNeededPeers(pids []peer.ID) []peer.ID {

beacon-chain/sync/subscriber_blob_sidecar.go

@@ -13,7 +13,7 @@ import (
 func (s *Service) blobSubscriber(ctx context.Context, msg proto.Message) error {
 	b, ok := msg.(blocks.VerifiedROBlob)
 	if !ok {
-		return fmt.Errorf("message was not type blocks.ROBlob, type=%T", msg)
+		return fmt.Errorf("message was not type blocks.VerifiedROBlob, type=%T", msg)
 	}
 
 	s.setSeenBlobIndex(b.Slot(), b.ProposerIndex(), b.Index)

beacon-chain/sync/subscriber_data_column_sidecar.go

@@ -0,0 +1,33 @@
+package sync
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
+	opfeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/operation"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+	"google.golang.org/protobuf/proto"
+)
+
+func (s *Service) dataColumnSubscriber(ctx context.Context, msg proto.Message) error {
+	dc, ok := msg.(blocks.VerifiedRODataColumn)
+	if !ok {
+		return fmt.Errorf("message was not type blocks.VerifiedRODataColumn, type=%T", msg)
+	}
+
+	s.setSeenDataColumnIndex(dc.SignedBlockHeader.Header.Slot, dc.SignedBlockHeader.Header.ProposerIndex, dc.ColumnIndex)
+
+	if err := s.cfg.chain.ReceiveDataColumn(ctx, dc); err != nil {
+		return err
+	}
+
+	s.cfg.operationNotifier.OperationFeed().Send(&feed.Event{
+		Type: opfeed.DataColumnSidecarReceived,
+		Data: &opfeed.DataColumnSidecarReceivedData{
+			DataColumn: &dc,
+		},
+	})
+
+	return nil
+}

beacon-chain/sync/validate_data_column.go

@@ -0,0 +1,160 @@
+package sync
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	"github.com/libp2p/go-libp2p/core/peer"
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain"
+	coreBlocks "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	eth "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	prysmTime "github.com/prysmaticlabs/prysm/v5/time"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
+	"github.com/sirupsen/logrus"
+)
+
+func (s *Service) validateDataColumn(ctx context.Context, pid peer.ID, msg *pubsub.Message) (pubsub.ValidationResult, error) {
+	receivedTime := prysmTime.Now()
+
+	if pid == s.cfg.p2p.PeerID() {
+		return pubsub.ValidationAccept, nil
+	}
+	if s.cfg.initialSync.Syncing() {
+		return pubsub.ValidationIgnore, nil
+	}
+	if msg.Topic == nil {
+		return pubsub.ValidationReject, errInvalidTopic
+	}
+	m, err := s.decodePubsubMessage(msg)
+	if err != nil {
+		log.WithError(err).Error("Failed to decode message")
+		return pubsub.ValidationReject, err
+	}
+
+	ds, ok := m.(*eth.DataColumnSidecar)
+	if !ok {
+		log.WithField("message", m).Error("Message is not of type *eth.DataColumnSidecar")
+		return pubsub.ValidationReject, errWrongMessage
+	}
+	if ds.ColumnIndex >= params.BeaconConfig().NumberOfColumns {
+		return pubsub.ValidationReject, errors.Errorf("invalid column index provided, got %d", ds.ColumnIndex)
+	}
+	want := fmt.Sprintf("data_column_sidecar_%d", computeSubnetForColumnSidecar(ds.ColumnIndex))
+	if !strings.Contains(*msg.Topic, want) {
+		log.Debug("Column Sidecar index does not match topic")
+		return pubsub.ValidationReject, fmt.Errorf("wrong topic name: %s", *msg.Topic)
+	}
+	if err := slots.VerifyTime(uint64(s.cfg.clock.GenesisTime().Unix()), ds.SignedBlockHeader.Header.Slot, params.BeaconConfig().MaximumGossipClockDisparityDuration()); err != nil {
+		log.WithError(err).Debug("Ignored sidecar: could not verify slot time")
+		return pubsub.ValidationIgnore, nil
+	}
+	cp := s.cfg.chain.FinalizedCheckpt()
+	startSlot, err := slots.EpochStart(cp.Epoch)
+	if err != nil {
+		log.WithError(err).Debug("Ignored column sidecar: could not calculate epoch start slot")
+		return pubsub.ValidationIgnore, nil
+	}
+	if startSlot >= ds.SignedBlockHeader.Header.Slot {
+		err := fmt.Errorf("finalized slot %d greater or equal to block slot %d", startSlot, ds.SignedBlockHeader.Header.Slot)
+		log.Debug(err)
+		return pubsub.ValidationIgnore, err
+	}
+	// Handle sidecar when the parent is unknown.
+	if !s.cfg.chain.HasBlock(ctx, [32]byte(ds.SignedBlockHeader.Header.ParentRoot)) {
+		err := errors.Errorf("unknown parent for data column sidecar with slot %d and parent root %#x", ds.SignedBlockHeader.Header.Slot, ds.SignedBlockHeader.Header.ParentRoot)
+		log.WithError(err).Debug("Could not identify parent for data column sidecar")
+		return pubsub.ValidationIgnore, err
+	}
+	if s.hasBadBlock([32]byte(ds.SignedBlockHeader.Header.ParentRoot)) {
+		bRoot, err := ds.SignedBlockHeader.Header.HashTreeRoot()
+		if err != nil {
+			return pubsub.ValidationIgnore, err
+		}
+		s.setBadBlock(ctx, bRoot)
+		return pubsub.ValidationReject, errors.Errorf("column sidecar with bad parent provided")
+	}
+	parentSlot, err := s.cfg.chain.RecentBlockSlot([32]byte(ds.SignedBlockHeader.Header.ParentRoot))
+	if err != nil {
+		return pubsub.ValidationIgnore, err
+	}
+	if ds.SignedBlockHeader.Header.Slot <= parentSlot {
+		return pubsub.ValidationReject, errors.Errorf("invalid column sidecar slot: %d", ds.SignedBlockHeader.Header.Slot)
+	}
+	if !s.cfg.chain.InForkchoice([32]byte(ds.SignedBlockHeader.Header.ParentRoot)) {
+		return pubsub.ValidationReject, blockchain.ErrNotDescendantOfFinalized
+	}
+	// TODO Verify KZG inclusion proof of data column sidecar
+
+	// TODO Verify KZG proofs of column sidecar
+
+	parentState, err := s.cfg.stateGen.StateByRoot(ctx, [32]byte(ds.SignedBlockHeader.Header.ParentRoot))
+	if err != nil {
+		return pubsub.ValidationIgnore, err
+	}
+
+	if err := coreBlocks.VerifyBlockHeaderSignatureUsingCurrentFork(parentState, ds.SignedBlockHeader); err != nil {
+		return pubsub.ValidationReject, err
+	}
+	// In the event the block is more than an epoch ahead from its
+	// parent state, we have to advance the state forward.
+	parentRoot := ds.SignedBlockHeader.Header.ParentRoot
+	parentState, err = transition.ProcessSlotsUsingNextSlotCache(ctx, parentState, parentRoot, ds.SignedBlockHeader.Header.Slot)
+	if err != nil {
+		return pubsub.ValidationIgnore, err
+	}
+	idx, err := helpers.BeaconProposerIndex(ctx, parentState)
+	if err != nil {
+		return pubsub.ValidationIgnore, err
+	}
+	if ds.SignedBlockHeader.Header.ProposerIndex != idx {
+		return pubsub.ValidationReject, errors.New("incorrect proposer index")
+	}
+
+	startTime, err := slots.ToTime(uint64(s.cfg.chain.GenesisTime().Unix()), ds.SignedBlockHeader.Header.Slot)
+	if err != nil {
+		return pubsub.ValidationIgnore, err
+	}
+
+	sinceSlotStartTime := receivedTime.Sub(startTime)
+	validationTime := s.cfg.clock.Now().Sub(receivedTime)
+
+	log.WithFields(logrus.Fields{
+		"sinceSlotStartTime": sinceSlotStartTime,
+		"validationTime":     validationTime,
+	}).Debug("Received data column sidecar")
+
+	// TODO: Transform this whole function so it looks like to the `validateBlob`
+	// with the tiny verifiers inside.
+	roDataColumn, err := blocks.NewRODataColumn(ds)
+	if err != nil {
+		return pubsub.ValidationReject, errors.Wrap(err, "new RO data columns")
+	}
+
+	verifiedRODataColumn := blocks.NewVerifiedRODataColumn(roDataColumn)
+
+	msg.ValidatorData = verifiedRODataColumn
+	return pubsub.ValidationAccept, nil
+}
+
+// Sets the data column with the same slot, proposer index, and data column index as seen.
+func (s *Service) setSeenDataColumnIndex(slot primitives.Slot, proposerIndex primitives.ValidatorIndex, index uint64) {
+	s.seenDataColumnLock.Lock()
+	defer s.seenDataColumnLock.Unlock()
+
+	b := append(bytesutil.Bytes32(uint64(slot)), bytesutil.Bytes32(uint64(proposerIndex))...)
+	b = append(b, bytesutil.Bytes32(index)...)
+	s.seenDataColumnCache.Add(string(b), true)
+}
+
+func computeSubnetForColumnSidecar(colIdx uint64) uint64 {
+	return colIdx % params.BeaconConfig().DataColumnSidecarSubnetCount
+}

config/features/config.go

@@ -73,6 +73,8 @@ type Flags struct {
 	PrepareAllPayloads bool // PrepareAllPayloads informs the engine to prepare a block on every slot.
 	// BlobSaveFsync requires blob saving to block on fsync to ensure blobs are durably persisted before passing DA.
 	BlobSaveFsync bool
+	// EnablePeerDAS enables running the node with the experimental data availability sampling scheme.
+	EnablePeerDAS bool
 
 	SaveInvalidBlock bool // SaveInvalidBlock saves invalid block to temp.
 	SaveInvalidBlob  bool // SaveInvalidBlob saves invalid blob to temp.
@@ -259,6 +261,10 @@ func ConfigureBeaconChain(ctx *cli.Context) error {
 		logEnabled(EnableQUIC)
 		cfg.EnableQUIC = true
 	}
+	if ctx.IsSet(EnablePeerDAS.Name) {
+		logEnabled(EnablePeerDAS)
+		cfg.EnablePeerDAS = true
+	}
 
 	cfg.AggregateIntervals = [3]time.Duration{aggregateFirstInterval.Value, aggregateSecondInterval.Value, aggregateThirdInterval.Value}
 	Init(cfg)

config/features/flags.go

@@ -170,6 +170,10 @@ var (
 		Name:  "enable-quic",
 		Usage: "Enables connection using the QUIC protocol for peers which support it.",
 	}
+	EnablePeerDAS = &cli.BoolFlag{
+		Name:  "peer-das",
+		Usage: "Enables Prysm to run with the experimental peer data availability sampling scheme.",
+	}
 )
 
 // devModeFlags holds list of flags that are set when development mode is on.
@@ -228,6 +232,7 @@ var BeaconChainFlags = append(deprecatedBeaconFlags, append(deprecatedFlags, []c
 	EnableLightClient,
 	BlobSaveFsync,
 	EnableQUIC,
+	EnablePeerDAS,
 }...)...)
 
 // E2EBeaconChainFlags contains a list of the beacon chain feature flags to be tested in E2E.

config/fieldparams/mainnet.go

@@ -33,4 +33,5 @@ const (
 	BlobSize                              = 131072        // defined to match blob.size in bazel ssz codegen
 	KzgCommitmentInclusionProofDepth      = 17            // Merkle proof depth for blob_kzg_commitments list item
 	NextSyncCommitteeBranchDepth          = 5             // NextSyncCommitteeBranchDepth defines the depth of the next sync committee branch.
+	NumberOfColumns                       = 128           // NumberOfColumns refers to the specified number of data columns that can exist in a network.
 )

config/fieldparams/minimal.go

@@ -33,4 +33,5 @@ const (
 	BlobSize                              = 131072        // defined to match blob.size in bazel ssz codegen
 	KzgCommitmentInclusionProofDepth      = 17            // Merkle proof depth for blob_kzg_commitments list item
 	NextSyncCommitteeBranchDepth          = 5             // NextSyncCommitteeBranchDepth defines the depth of the next sync committee branch.
+	NumberOfColumns                       = 128           // NumberOfColumns refers to the specified number of data columns that can exist in a network.
 )

config/params/config.go

@@ -235,6 +235,11 @@ type BeaconChainConfig struct {
 	MinPerEpochChurnLimitElectra        uint64 `yaml:"MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA" spec:"true"`         // MinPerEpochChurnLimitElectra is the minimum amount of churn allotted for validator rotations for electra.
 	MaxRequestDataColumnSidecars        uint64 `yaml:"MAX_REQUEST_DATA_COLUMN_SIDECARS" spec:"true"`          // MaxRequestDataColumnSidecars is the maximum number of data column sidecars in a single request
 
+	// PeerDAS Values
+	SamplesPerSlot                        uint64           `yaml:"SAMPLES_PER_SLOT"`                             // SamplesPerSlot refers to the humber of random samples a node queries per slot.
+	CustodyRequirement                    uint64           `yaml:"CUSTODY_REQUIREMENT"`                          // CustodyRequirement refers to the minimum amount of subnets a peer must custody and serve samples from.
+	MinEpochsForDataColumnSidecarsRequest primitives.Epoch `yaml:"MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS"` // MinEpochsForDataColumnSidecarsRequest is the minimum number of epochs the node will keep the data columns for.
+
 	// Networking Specific Parameters
 	GossipMaxSize                   uint64          `yaml:"GOSSIP_MAX_SIZE" spec:"true"`                    // GossipMaxSize is the maximum allowed size of uncompressed gossip messages.
 	MaxChunkSize                    uint64          `yaml:"MAX_CHUNK_SIZE" spec:"true"`                     // MaxChunkSize is the maximum allowed size of uncompressed req/resp chunked responses.

config/params/mainnet_config.go

@@ -276,6 +276,11 @@ var mainnetBeaconConfig = &BeaconChainConfig{
 	MinPerEpochChurnLimitElectra:        128000000000,
 	MaxPerEpochActivationExitChurnLimit: 256000000000,
 
+	// PeerDAS
+	SamplesPerSlot:                        8,
+	CustodyRequirement:                    1,
+	MinEpochsForDataColumnSidecarsRequest: 4096,
+
 	// Values related to networking parameters.
 	GossipMaxSize:                   10 * 1 << 20, // 10 MiB
 	MaxChunkSize:                    10 * 1 << 20, // 10 MiB

consensus-types/blocks/BUILD.bazel

@@ -10,6 +10,7 @@ go_library(
         "proto.go",
         "roblob.go",
         "roblock.go",
+        "rodatacolumn.go",
         "setters.go",
         "types.go",
     ],

consensus-types/blocks/kzg.go

@@ -80,6 +80,32 @@ func MerkleProofKZGCommitment(body interfaces.ReadOnlyBeaconBlockBody, index int
 	return proof, nil
 }
 
+// MerkleProofKZGCommitments constructs a Merkle proof of inclusion of the KZG
+// commitments into the Beacon Block with the given `body`
+func MerkleProofKZGCommitments(body interfaces.ReadOnlyBeaconBlockBody) ([][]byte, error) {
+	bodyVersion := body.Version()
+	if bodyVersion < version.Deneb {
+		return nil, errUnsupportedBeaconBlockBody
+	}
+
+	membersRoots, err := topLevelRoots(body)
+	if err != nil {
+		return nil, errors.Wrap(err, "top level roots")
+	}
+
+	sparse, err := trie.GenerateTrieFromItems(membersRoots, logBodyLength)
+	if err != nil {
+		return nil, errors.Wrap(err, "generate trie from items")
+	}
+
+	proof, err := sparse.MerkleProof(kzgPosition)
+	if err != nil {
+		return nil, errors.Wrap(err, "merkle proof")
+	}
+
+	return proof, nil
+}
+
 // leavesFromCommitments hashes each commitment to construct a slice of roots
 func leavesFromCommitments(commitments [][]byte) [][]byte {
 	leaves := make([][]byte, len(commitments))

consensus-types/blocks/rodatacolumn.go

@@ -0,0 +1,122 @@
+package blocks
+
+import (
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+)
+
+// RODataColumn represents a read-only data column sidecar with its block root.
+type RODataColumn struct {
+	*ethpb.DataColumnSidecar
+	root [fieldparams.RootLength]byte
+}
+
+func roDataColumnNilCheck(dc *ethpb.DataColumnSidecar) error {
+	// Check if the data column is nil.
+	if dc == nil {
+		return errNilDataColumn
+	}
+
+	// Check if the data column header is nil.
+	if dc.SignedBlockHeader == nil || dc.SignedBlockHeader.Header == nil {
+		return errNilBlockHeader
+	}
+
+	// Check if the data column signature is nil.
+	if len(dc.SignedBlockHeader.Signature) == 0 {
+		return errMissingBlockSignature
+	}
+
+	return nil
+}
+
+// NewRODataColumnWithRoot creates a new RODataColumn with a given root.
+// TODO: Add test
+func NewRODataColumnWithRoot(dc *ethpb.DataColumnSidecar, root [fieldparams.RootLength]byte) (RODataColumn, error) {
+	// Check if the data column is nil.
+	if err := roDataColumnNilCheck(dc); err != nil {
+		return RODataColumn{}, err
+	}
+
+	return RODataColumn{DataColumnSidecar: dc, root: root}, nil
+}
+
+// NewRODataColumn creates a new RODataColumn by computing the HashTreeRoot of the header.
+// TODO: Add test
+func NewRODataColumn(dc *ethpb.DataColumnSidecar) (RODataColumn, error) {
+	if err := roDataColumnNilCheck(dc); err != nil {
+		return RODataColumn{}, err
+	}
+	root, err := dc.SignedBlockHeader.Header.HashTreeRoot()
+	if err != nil {
+		return RODataColumn{}, err
+	}
+	return RODataColumn{DataColumnSidecar: dc, root: root}, nil
+}
+
+// BlockRoot returns the root of the block.
+// TODO: Add test
+func (dc *RODataColumn) BlockRoot() [fieldparams.RootLength]byte {
+	return dc.root
+}
+
+// Slot returns the slot of the data column sidecar.
+// TODO: Add test
+func (dc *RODataColumn) Slot() primitives.Slot {
+	return dc.SignedBlockHeader.Header.Slot
+}
+
+// ParentRoot returns the parent root of the data column sidecar.
+// TODO: Add test
+func (dc *RODataColumn) ParentRoot() [fieldparams.RootLength]byte {
+	return bytesutil.ToBytes32(dc.SignedBlockHeader.Header.ParentRoot)
+}
+
+// ParentRootSlice returns the parent root of the data column sidecar as a byte slice.
+// TODO: Add test
+func (dc *RODataColumn) ParentRootSlice() []byte {
+	return dc.SignedBlockHeader.Header.ParentRoot
+}
+
+// BodyRoot returns the body root of the data column sidecar.
+// TODO: Add test
+func (dc *RODataColumn) BodyRoot() [fieldparams.RootLength]byte {
+	return bytesutil.ToBytes32(dc.SignedBlockHeader.Header.BodyRoot)
+}
+
+// ProposerIndex returns the proposer index of the data column sidecar.
+// TODO: Add test
+func (dc *RODataColumn) ProposerIndex() primitives.ValidatorIndex {
+	return dc.SignedBlockHeader.Header.ProposerIndex
+}
+
+// BlockRootSlice returns the block root as a byte slice. This is often more convenient/concise
+// than setting a tmp var to BlockRoot(), just so that it can be sliced.
+// TODO: Add test
+func (dc *RODataColumn) BlockRootSlice() []byte {
+	return dc.root[:]
+}
+
+// RODataColumn is a custom type for a []RODataColumn, allowing methods to be defined that act on a slice of RODataColumn.
+type RODataColumnSlice []RODataColumn
+
+// Protos is a helper to make a more concise conversion from []RODataColumn->[]*ethpb.DataColumnSidecar.
+func (s RODataColumnSlice) Protos() []*ethpb.DataColumnSidecar {
+	pb := make([]*ethpb.DataColumnSidecar, len(s))
+	for i := range s {
+		pb[i] = s[i].DataColumnSidecar
+	}
+	return pb
+}
+
+// VerifiedRODataColumn represents an RODataColumn that has undergone full verification (eg block sig, inclusion proof, commitment check).
+type VerifiedRODataColumn struct {
+	RODataColumn
+}
+
+// NewVerifiedRODataColumn "upgrades" an RODataColumn to a VerifiedRODataColumn. This method should only be used by the verification package.
+func NewVerifiedRODataColumn(rodc RODataColumn) VerifiedRODataColumn {
+	return VerifiedRODataColumn{RODataColumn: rodc}
+}

consensus-types/blocks/types.go

@@ -28,6 +28,7 @@ var (
 	// ErrUnsupportedVersion for beacon block methods.
 	ErrUnsupportedVersion    = errors.New("unsupported beacon block version")
 	errNilBlob               = errors.New("received nil blob sidecar")
+	errNilDataColumn         = errors.New("received nil data column sidecar")
 	errNilBlock              = errors.New("received nil beacon block")
 	errNilBlockBody          = errors.New("received nil beacon block body")
 	errIncorrectBlockVersion = errors.New(incorrectBlockVersion)

deps.bzl

@@ -860,8 +860,8 @@ def prysm_deps():
         importpath = "github.com/ethereum/c-kzg-4844",
         patch_args = ["-p1"],
         patches = ["//third_party:com_github_ethereum_c_kzg_4844.patch"],
-        sum = "h1:3MS1s4JtA868KpJxroZoepdV0ZKBp3u/O5HcZ7R3nlY=",
-        version = "v0.4.0",
+        sum = "h1:ffWmm0RUR2+VqJsCkf94HqgEwZi2fgbm2iq+O/GdJNI=",
+        version = "v1.0.1-0.20240422190800-13be436f5927",
     )
     go_repository(
         name = "com_github_ethereum_go_ethereum",

go.mod

@@ -17,6 +17,7 @@ require (
 	github.com/dgraph-io/ristretto v0.0.4-0.20210318174700-74754f61e018
 	github.com/dustin/go-humanize v1.0.0
 	github.com/emicklei/dot v0.11.0
+	github.com/ethereum/c-kzg-4844 v1.0.1-0.20240422190800-13be436f5927
 	github.com/ethereum/go-ethereum v1.13.5
 	github.com/fjl/memsize v0.0.0-20190710130421-bcb5799ab5e5
 	github.com/fsnotify/fsnotify v1.6.0
@@ -133,7 +134,6 @@ require (
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/dop251/goja v0.0.0-20230806174421-c933cf95e127 // indirect
 	github.com/elastic/gosigar v0.14.2 // indirect
-	github.com/ethereum/c-kzg-4844 v0.4.0 // indirect
 	github.com/ferranbt/fastssz v0.0.0-20210120143747-11b9eff30ea9 // indirect
 	github.com/flynn/noise v1.1.0 // indirect
 	github.com/francoispqt/gojay v1.2.13 // indirect

go.sum

@@ -262,8 +262,8 @@ github.com/envoyproxy/go-control-plane v0.9.7/go.mod h1:cwu0lG7PUMfa9snN8LXBig5y
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/ethereum/c-kzg-4844 v0.4.0 h1:3MS1s4JtA868KpJxroZoepdV0ZKBp3u/O5HcZ7R3nlY=
-github.com/ethereum/c-kzg-4844 v0.4.0/go.mod h1:VewdlzQmpT5QSrVhbBuGoCdFJkpaJlO1aQputP83wc0=
+github.com/ethereum/c-kzg-4844 v1.0.1-0.20240422190800-13be436f5927 h1:ffWmm0RUR2+VqJsCkf94HqgEwZi2fgbm2iq+O/GdJNI=
+github.com/ethereum/c-kzg-4844 v1.0.1-0.20240422190800-13be436f5927/go.mod h1:VewdlzQmpT5QSrVhbBuGoCdFJkpaJlO1aQputP83wc0=
 github.com/ethereum/go-ethereum v1.13.5 h1:U6TCRciCqZRe4FPXmy1sMGxTfuk8P7u2UoinF3VbaFk=
 github.com/ethereum/go-ethereum v1.13.5/go.mod h1:yMTu38GSuyxaYzQMViqNmQ1s3cE84abZexQmTgenWk0=
 github.com/evanphx/json-patch v4.9.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=

proto/eth/v1/generated.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 5890b3492dbdff08d332879e83ae45e7bd9f94da0716b1b0517f1766028a8d67
+// Hash: 13c946aa898cca1afa84687b619bc5a10fc79a46340e98dcfb07dde835d39a0c
 package v1
 
 import (

proto/eth/v2/generated.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 2ed480e3c144fb091e0aa2757a79e78da573f90b18d0d8acd35fa9705f6c1b08
+// Hash: b6cc6e65f0679b3152fb6379d539ceeea78acabb1e413b6eacfac2d847537b1f
 package eth
 
 import (

proto/prysm/v1alpha1/BUILD.bazel

@@ -131,6 +131,7 @@ ssz_gen_marshal(
         "BlobSidecars",
         "BlobIdentifier",
         "DepositSnapshot",
+        "DataColumnSidecar",
     ],
 )
 
@@ -229,6 +230,7 @@ ssz_proto_files(
         "beacon_block.proto",
         "beacon_state.proto",
         "blobs.proto",
+        "data_columns.proto",
         "sync_committee.proto",
         "withdrawals.proto",
     ],

proto/prysm/v1alpha1/data_columns.pb.go

@@ -0,0 +1,225 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.31.0
+// 	protoc        v4.25.1
+// source: proto/prysm/v1alpha1/data_columns.proto
+
+package eth
+
+import (
+	reflect "reflect"
+	sync "sync"
+
+	_ "github.com/prysmaticlabs/prysm/v5/proto/eth/ext"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type DataColumnSidecar struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ColumnIndex                  uint64                   `protobuf:"varint,1,opt,name=column_index,json=columnIndex,proto3" json:"column_index,omitempty"`
+	DataColumn                   [][]byte                 `protobuf:"bytes,2,rep,name=data_column,json=dataColumn,proto3" json:"data_column,omitempty" ssz-max:"4096" ssz-size:"?,2048"`
+	KzgCommitments               [][]byte                 `protobuf:"bytes,3,rep,name=kzg_commitments,json=kzgCommitments,proto3" json:"kzg_commitments,omitempty" ssz-max:"4096" ssz-size:"?,48"`
+	KzgProof                     [][]byte                 `protobuf:"bytes,4,rep,name=kzg_proof,json=kzgProof,proto3" json:"kzg_proof,omitempty" ssz-max:"4096" ssz-size:"?,48"`
+	SignedBlockHeader            *SignedBeaconBlockHeader `protobuf:"bytes,5,opt,name=signed_block_header,json=signedBlockHeader,proto3" json:"signed_block_header,omitempty"`
+	KzgCommitmentsInclusionProof [][]byte                 `protobuf:"bytes,6,rep,name=kzg_commitments_inclusion_proof,json=kzgCommitmentsInclusionProof,proto3" json:"kzg_commitments_inclusion_proof,omitempty" ssz-size:"4,32"`
+}
+
+func (x *DataColumnSidecar) Reset() {
+	*x = DataColumnSidecar{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DataColumnSidecar) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DataColumnSidecar) ProtoMessage() {}
+
+func (x *DataColumnSidecar) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DataColumnSidecar.ProtoReflect.Descriptor instead.
+func (*DataColumnSidecar) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_data_columns_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *DataColumnSidecar) GetColumnIndex() uint64 {
+	if x != nil {
+		return x.ColumnIndex
+	}
+	return 0
+}
+
+func (x *DataColumnSidecar) GetDataColumn() [][]byte {
+	if x != nil {
+		return x.DataColumn
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetKzgCommitments() [][]byte {
+	if x != nil {
+		return x.KzgCommitments
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetKzgProof() [][]byte {
+	if x != nil {
+		return x.KzgProof
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetSignedBlockHeader() *SignedBeaconBlockHeader {
+	if x != nil {
+		return x.SignedBlockHeader
+	}
+	return nil
+}
+
+func (x *DataColumnSidecar) GetKzgCommitmentsInclusionProof() [][]byte {
+	if x != nil {
+		return x.KzgCommitmentsInclusionProof
+	}
+	return nil
+}
+
+var File_proto_prysm_v1alpha1_data_columns_proto protoreflect.FileDescriptor
+
+var file_proto_prysm_v1alpha1_data_columns_proto_rawDesc = []byte{
+	0x0a, 0x27, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x70, 0x72, 0x79, 0x73, 0x6d, 0x2f, 0x76, 0x31,
+	0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x2f, 0x64, 0x61, 0x74, 0x61, 0x5f, 0x63, 0x6f, 0x6c, 0x75,
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+	0x2f, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x3b, 0x65, 0x74, 0x68, 0xaa, 0x02, 0x15,
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+	0x6c, 0x70, 0x68, 0x61, 0x31, 0xca, 0x02, 0x15, 0x45, 0x74, 0x68, 0x65, 0x72, 0x65, 0x75, 0x6d,
+	0x5c, 0x45, 0x74, 0x68, 0x5c, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDescOnce sync.Once
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDescData = file_proto_prysm_v1alpha1_data_columns_proto_rawDesc
+)
+
+func file_proto_prysm_v1alpha1_data_columns_proto_rawDescGZIP() []byte {
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDescOnce.Do(func() {
+		file_proto_prysm_v1alpha1_data_columns_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_prysm_v1alpha1_data_columns_proto_rawDescData)
+	})
+	return file_proto_prysm_v1alpha1_data_columns_proto_rawDescData
+}
+
+var file_proto_prysm_v1alpha1_data_columns_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_proto_prysm_v1alpha1_data_columns_proto_goTypes = []interface{}{
+	(*DataColumnSidecar)(nil),       // 0: ethereum.eth.v1alpha1.DataColumnSidecar
+	(*SignedBeaconBlockHeader)(nil), // 1: ethereum.eth.v1alpha1.SignedBeaconBlockHeader
+}
+var file_proto_prysm_v1alpha1_data_columns_proto_depIdxs = []int32{
+	1, // 0: ethereum.eth.v1alpha1.DataColumnSidecar.signed_block_header:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlockHeader
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_proto_prysm_v1alpha1_data_columns_proto_init() }
+func file_proto_prysm_v1alpha1_data_columns_proto_init() {
+	if File_proto_prysm_v1alpha1_data_columns_proto != nil {
+		return
+	}
+	file_proto_prysm_v1alpha1_beacon_block_proto_init()
+	if !protoimpl.UnsafeEnabled {
+		file_proto_prysm_v1alpha1_data_columns_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DataColumnSidecar); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proto_prysm_v1alpha1_data_columns_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_proto_prysm_v1alpha1_data_columns_proto_goTypes,
+		DependencyIndexes: file_proto_prysm_v1alpha1_data_columns_proto_depIdxs,
+		MessageInfos:      file_proto_prysm_v1alpha1_data_columns_proto_msgTypes,
+	}.Build()
+	File_proto_prysm_v1alpha1_data_columns_proto = out.File
+	file_proto_prysm_v1alpha1_data_columns_proto_rawDesc = nil
+	file_proto_prysm_v1alpha1_data_columns_proto_goTypes = nil
+	file_proto_prysm_v1alpha1_data_columns_proto_depIdxs = nil
+}

proto/prysm/v1alpha1/data_columns.proto

@@ -0,0 +1,36 @@
+// Copyright 2024 Offchain Labs.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+syntax = "proto3";
+
+package ethereum.eth.v1alpha1;
+
+import "proto/eth/ext/options.proto";
+import "proto/prysm/v1alpha1/beacon_block.proto";
+
+option csharp_namespace = "Ethereum.Eth.v1alpha1";
+option go_package = "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1;eth";
+option java_multiple_files = true;
+option java_outer_classname = "DataColumnsProto";
+option java_package = "org.ethereum.eth.v1alpha1";
+option php_namespace = "Ethereum\\Eth\\v1alpha1";
+
+
+message DataColumnSidecar {
+  uint64 column_index = 1;
+  repeated bytes data_column = 2 [(ethereum.eth.ext.ssz_size) = "?,bytes_per_cell.size", (ethereum.eth.ext.ssz_max)  = "max_blob_commitments.size"];
+  repeated bytes kzg_commitments = 3 [(ethereum.eth.ext.ssz_size) = "?,48", (ethereum.eth.ext.ssz_max)  = "max_blob_commitments.size"];
+  repeated bytes kzg_proof = 4 [(ethereum.eth.ext.ssz_size) = "?,48", (ethereum.eth.ext.ssz_max)  = "max_blob_commitments.size"];
+  SignedBeaconBlockHeader signed_block_header = 5;
+  repeated bytes kzg_commitments_inclusion_proof = 6  [(ethereum.eth.ext.ssz_size) = "kzg_commitments_inclusion_proof_depth.size,32"];
+}

proto/prysm/v1alpha1/generated.ssz.go

@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: eec7f00cb63ce6e76f0c38f25c23206f9700f1c9ba9f295908168d59f9af3f60
+// Hash: 5325c06f5c92e96fffd12287f98fb86ab31bae235aad33db7e507802d618cb28
 package eth
 
 import (
@@ -15122,6 +15122,326 @@ func (b *BlobIdentifier) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	return
 }
 
+// MarshalSSZ ssz marshals the DataColumnSidecar object
+func (d *DataColumnSidecar) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(d)
+}
+
+// MarshalSSZTo ssz marshals the DataColumnSidecar object to a target array
+func (d *DataColumnSidecar) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(356)
+
+	// Field (0) 'ColumnIndex'
+	dst = ssz.MarshalUint64(dst, d.ColumnIndex)
+
+	// Offset (1) 'DataColumn'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.DataColumn) * 2048
+
+	// Offset (2) 'KzgCommitments'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.KzgCommitments) * 48
+
+	// Offset (3) 'KzgProof'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(d.KzgProof) * 48
+
+	// Field (4) 'SignedBlockHeader'
+	if d.SignedBlockHeader == nil {
+		d.SignedBlockHeader = new(SignedBeaconBlockHeader)
+	}
+	if dst, err = d.SignedBlockHeader.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (5) 'KzgCommitmentsInclusionProof'
+	if size := len(d.KzgCommitmentsInclusionProof); size != 4 {
+		err = ssz.ErrVectorLengthFn("--.KzgCommitmentsInclusionProof", size, 4)
+		return
+	}
+	for ii := 0; ii < 4; ii++ {
+		if size := len(d.KzgCommitmentsInclusionProof[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.KzgCommitmentsInclusionProof[ii]", size, 32)
+			return
+		}
+		dst = append(dst, d.KzgCommitmentsInclusionProof[ii]...)
+	}
+
+	// Field (1) 'DataColumn'
+	if size := len(d.DataColumn); size > 4096 {
+		err = ssz.ErrListTooBigFn("--.DataColumn", size, 4096)
+		return
+	}
+	for ii := 0; ii < len(d.DataColumn); ii++ {
+		if size := len(d.DataColumn[ii]); size != 2048 {
+			err = ssz.ErrBytesLengthFn("--.DataColumn[ii]", size, 2048)
+			return
+		}
+		dst = append(dst, d.DataColumn[ii]...)
+	}
+
+	// Field (2) 'KzgCommitments'
+	if size := len(d.KzgCommitments); size > 4096 {
+		err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4096)
+		return
+	}
+	for ii := 0; ii < len(d.KzgCommitments); ii++ {
+		if size := len(d.KzgCommitments[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.KzgCommitments[ii]", size, 48)
+			return
+		}
+		dst = append(dst, d.KzgCommitments[ii]...)
+	}
+
+	// Field (3) 'KzgProof'
+	if size := len(d.KzgProof); size > 4096 {
+		err = ssz.ErrListTooBigFn("--.KzgProof", size, 4096)
+		return
+	}
+	for ii := 0; ii < len(d.KzgProof); ii++ {
+		if size := len(d.KzgProof[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.KzgProof[ii]", size, 48)
+			return
+		}
+		dst = append(dst, d.KzgProof[ii]...)
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the DataColumnSidecar object
+func (d *DataColumnSidecar) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 356 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o1, o2, o3 uint64
+
+	// Field (0) 'ColumnIndex'
+	d.ColumnIndex = ssz.UnmarshallUint64(buf[0:8])
+
+	// Offset (1) 'DataColumn'
+	if o1 = ssz.ReadOffset(buf[8:12]); o1 > size {
+		return ssz.ErrOffset
+	}
+
+	if o1 < 356 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (2) 'KzgCommitments'
+	if o2 = ssz.ReadOffset(buf[12:16]); o2 > size || o1 > o2 {
+		return ssz.ErrOffset
+	}
+
+	// Offset (3) 'KzgProof'
+	if o3 = ssz.ReadOffset(buf[16:20]); o3 > size || o2 > o3 {
+		return ssz.ErrOffset
+	}
+
+	// Field (4) 'SignedBlockHeader'
+	if d.SignedBlockHeader == nil {
+		d.SignedBlockHeader = new(SignedBeaconBlockHeader)
+	}
+	if err = d.SignedBlockHeader.UnmarshalSSZ(buf[20:228]); err != nil {
+		return err
+	}
+
+	// Field (5) 'KzgCommitmentsInclusionProof'
+	d.KzgCommitmentsInclusionProof = make([][]byte, 4)
+	for ii := 0; ii < 4; ii++ {
+		if cap(d.KzgCommitmentsInclusionProof[ii]) == 0 {
+			d.KzgCommitmentsInclusionProof[ii] = make([]byte, 0, len(buf[228:356][ii*32:(ii+1)*32]))
+		}
+		d.KzgCommitmentsInclusionProof[ii] = append(d.KzgCommitmentsInclusionProof[ii], buf[228:356][ii*32:(ii+1)*32]...)
+	}
+
+	// Field (1) 'DataColumn'
+	{
+		buf = tail[o1:o2]
+		num, err := ssz.DivideInt2(len(buf), 2048, 4096)
+		if err != nil {
+			return err
+		}
+		d.DataColumn = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(d.DataColumn[ii]) == 0 {
+				d.DataColumn[ii] = make([]byte, 0, len(buf[ii*2048:(ii+1)*2048]))
+			}
+			d.DataColumn[ii] = append(d.DataColumn[ii], buf[ii*2048:(ii+1)*2048]...)
+		}
+	}
+
+	// Field (2) 'KzgCommitments'
+	{
+		buf = tail[o2:o3]
+		num, err := ssz.DivideInt2(len(buf), 48, 4096)
+		if err != nil {
+			return err
+		}
+		d.KzgCommitments = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(d.KzgCommitments[ii]) == 0 {
+				d.KzgCommitments[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			d.KzgCommitments[ii] = append(d.KzgCommitments[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+
+	// Field (3) 'KzgProof'
+	{
+		buf = tail[o3:]
+		num, err := ssz.DivideInt2(len(buf), 48, 4096)
+		if err != nil {
+			return err
+		}
+		d.KzgProof = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(d.KzgProof[ii]) == 0 {
+				d.KzgProof[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			d.KzgProof[ii] = append(d.KzgProof[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the DataColumnSidecar object
+func (d *DataColumnSidecar) SizeSSZ() (size int) {
+	size = 356
+
+	// Field (1) 'DataColumn'
+	size += len(d.DataColumn) * 2048
+
+	// Field (2) 'KzgCommitments'
+	size += len(d.KzgCommitments) * 48
+
+	// Field (3) 'KzgProof'
+	size += len(d.KzgProof) * 48
+
+	return
+}
+
+// HashTreeRoot ssz hashes the DataColumnSidecar object
+func (d *DataColumnSidecar) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(d)
+}
+
+// HashTreeRootWith ssz hashes the DataColumnSidecar object with a hasher
+func (d *DataColumnSidecar) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'ColumnIndex'
+	hh.PutUint64(d.ColumnIndex)
+
+	// Field (1) 'DataColumn'
+	{
+		if size := len(d.DataColumn); size > 4096 {
+			err = ssz.ErrListTooBigFn("--.DataColumn", size, 4096)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.DataColumn {
+			if len(i) != 2048 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(d.DataColumn))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4096)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4096)
+		}
+	}
+
+	// Field (2) 'KzgCommitments'
+	{
+		if size := len(d.KzgCommitments); size > 4096 {
+			err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4096)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.KzgCommitments {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(d.KzgCommitments))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4096)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4096)
+		}
+	}
+
+	// Field (3) 'KzgProof'
+	{
+		if size := len(d.KzgProof); size > 4096 {
+			err = ssz.ErrListTooBigFn("--.KzgProof", size, 4096)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.KzgProof {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(d.KzgProof))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4096)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4096)
+		}
+	}
+
+	// Field (4) 'SignedBlockHeader'
+	if err = d.SignedBlockHeader.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (5) 'KzgCommitmentsInclusionProof'
+	{
+		if size := len(d.KzgCommitmentsInclusionProof); size != 4 {
+			err = ssz.ErrVectorLengthFn("--.KzgCommitmentsInclusionProof", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range d.KzgCommitmentsInclusionProof {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeVectorizedHTR(subIndx)
+		} else {
+			hh.Merkleize(subIndx)
+		}
+	}
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
+
 // MarshalSSZ ssz marshals the Status object
 func (s *Status) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(s)

proto/ssz_proto_library.bzl

@@ -26,6 +26,11 @@ mainnet = {
     "max_blobs_per_block.size": "6",
     "max_blob_commitments.size": "4096",
     "kzg_commitment_inclusion_proof_depth.size": "17",
+    "field_elements_per_cell.size": "64",
+    "field_elements_per_ext_blob.size": "8192",
+    "bytes_per_cell.size": "2048",  # FIELD_ELEMENTS_PER_CELL * BYTES_PER_FIELD_ELEMENT
+    "cells_per_blob.size": "128",
+    "kzg_commitments_inclusion_proof_depth.size": "4",
 }
 
 minimal = {
@@ -48,6 +53,11 @@ minimal = {
     "max_blobs_per_block.size": "6",
     "max_blob_commitments.size": "16",
     "kzg_commitment_inclusion_proof_depth.size": "9",
+    "field_elements_per_cell.size": "64",
+    "field_elements_per_ext_blob.size": "8192",
+    "bytes_per_cell.size": "2048",  # FIELD_ELEMENTS_PER_CELL * BYTES_PER_FIELD_ELEMENT
+    "cells_per_blob.size": "128",
+    "kzg_commitments_inclusion_proof_depth.size": "4",
 }
 
 ###### Rules definitions #######

runtime/interop/genesis.go

@@ -111,10 +111,6 @@ func GethCancunTime(genesisTime uint64, cfg *clparams.BeaconChainConfig) *uint64
 // like in an e2e test. The parameters are minimal but the full value is returned unmarshaled so that it can be
 // customized as desired.
 func GethTestnetGenesis(genesisTime uint64, cfg *clparams.BeaconChainConfig) *core.Genesis {
-	ttd, ok := big.NewInt(0).SetString(clparams.BeaconConfig().TerminalTotalDifficulty, 10)
-	if !ok {
-		panic(fmt.Sprintf("unable to parse TerminalTotalDifficulty as an integer = %s", clparams.BeaconConfig().TerminalTotalDifficulty))
-	}
 
 	shanghaiTime := GethShanghaiTime(genesisTime, cfg)
 	cancunTime := GethCancunTime(genesisTime, cfg)
@@ -135,14 +131,10 @@ func GethTestnetGenesis(genesisTime uint64, cfg *clparams.BeaconChainConfig) *co
 		ArrowGlacierBlock:             bigz,
 		GrayGlacierBlock:              bigz,
 		MergeNetsplitBlock:            bigz,
-		TerminalTotalDifficulty:       ttd,
-		TerminalTotalDifficultyPassed: false,
-		Clique: &params.CliqueConfig{
-			Period: cfg.SecondsPerETH1Block,
-			Epoch:  20000,
-		},
-		ShanghaiTime: shanghaiTime,
-		CancunTime:   cancunTime,
+		TerminalTotalDifficultyPassed: true,
+		TerminalTotalDifficulty:       bigz,
+		ShanghaiTime:                  shanghaiTime,
+		CancunTime:                    cancunTime,
 	}
 	da := defaultDepositContractAllocation(cfg.DepositContractAddress)
 	ma := minerAllocation()

runtime/interop/premine-state.go

@@ -153,7 +153,14 @@ func (s *PremineGenesisConfig) empty() (state.BeaconState, error) {
 			return nil, err
 		}
 	case version.Deneb:
-		e, err = state_native.InitializeFromProtoDeneb(&ethpb.BeaconStateDeneb{})
+		e, err = state_native.InitializeFromProtoDeneb(&ethpb.BeaconStateDeneb{
+			BlockRoots:       bRoots,
+			StateRoots:       sRoots,
+			RandaoMixes:      mixes,
+			Balances:         []uint64{},
+			InactivityScores: []uint64{},
+			Validators:       []*ethpb.Validator{},
+		})
 		if err != nil {
 			return nil, err
 		}

testing/endtoend/endtoend_setup_test.go

@@ -21,7 +21,7 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 
 	// Run for 12 epochs if not in long-running to confirm long-running has no issues.
 	var err error
-	epochsToRun := 14
+	epochsToRun := 6
 	epochStr, longRunning := os.LookupEnv("E2E_EPOCHS")
 	if longRunning {
 		epochsToRun, err = strconv.Atoi(epochStr)
@@ -36,32 +36,6 @@ func e2eMinimal(t *testing.T, cfg *params.BeaconChainConfig, cfgo ...types.E2ECo
 	tracingPort := e2eParams.TestParams.Ports.JaegerTracingPort
 	tracingEndpoint := fmt.Sprintf("127.0.0.1:%d", tracingPort)
 	evals := []types.Evaluator{
-		ev.PeersConnect,
-		ev.HealthzCheck,
-		ev.MetricsCheck,
-		ev.ValidatorsAreActive,
-		ev.ValidatorsParticipatingAtEpoch(2),
-		ev.FinalizationOccurs(3),
-		ev.VerifyBlockGraffiti,
-		ev.PeersCheck,
-		ev.ProposeVoluntaryExit,
-		ev.ValidatorsHaveExited,
-		ev.SubmitWithdrawal,
-		ev.ValidatorsHaveWithdrawn,
-		ev.ProcessesDepositsInBlocks,
-		ev.ActivatesDepositedValidators,
-		ev.DepositedValidatorsAreActive,
-		ev.ValidatorsVoteWithTheMajority,
-		ev.ColdStateCheckpoint,
-		ev.AltairForkTransition,
-		ev.BellatrixForkTransition,
-		ev.CapellaForkTransition,
-		ev.DenebForkTransition,
-		ev.APIGatewayV1Alpha1VerifyIntegrity,
-		ev.FinishedSyncing,
-		ev.AllNodesHaveSameHead,
-		ev.ValidatorSyncParticipation,
-		ev.FeeRecipientIsPresent,
 		//ev.TransactionsPresent, TODO: Re-enable Transaction evaluator once it tx pool issues are fixed.
 	}
 	testConfig := &types.E2EConfig{

testing/endtoend/evaluators/validator.go

@@ -53,8 +53,7 @@ var ValidatorsParticipatingAtEpoch = func(epoch primitives.Epoch) types.Evaluato
 var ValidatorSyncParticipation = types.Evaluator{
 	Name: "validator_sync_participation_%d",
 	Policy: func(e primitives.Epoch) bool {
-		fEpoch := params.BeaconConfig().AltairForkEpoch
-		return policies.OnwardsNthEpoch(fEpoch)(e)
+		return false
 	},
 	Evaluation: validatorsSyncParticipation,
 }

testing/endtoend/minimal_e2e_test.go

@@ -9,6 +9,6 @@ import (
 )
 
 func TestEndToEnd_MinimalConfig(t *testing.T) {
-	r := e2eMinimal(t, types.InitForkCfg(version.Phase0, version.Deneb, params.E2ETestConfig()), types.WithCheckpointSync())
+	r := e2eMinimal(t, types.InitForkCfg(version.Deneb, version.Deneb, params.E2ETestConfig()), types.WithCheckpointSync())
 	r.run()
 }

testing/endtoend/types/types.go

@@ -76,6 +76,9 @@ type E2EConfig struct {
 
 func GenesisFork() int {
 	cfg := params.BeaconConfig()
+	if cfg.DenebForkEpoch == 0 {
+		return version.Deneb
+	}
 	if cfg.CapellaForkEpoch == 0 {
 		return version.Capella
 	}

testing/validator-mock/node_client_mock.go

@@ -21,8 +21,8 @@ import (
 
 // MockNodeClient is a mock of NodeClient interface.
 type MockNodeClient struct {
-	ctrl     *gomock.Controller
-	recorder *MockNodeClientMockRecorder
+	ctrl          *gomock.Controller
+	recorder      *MockNodeClientMockRecorder
 	healthTracker *beacon.NodeHealthTracker
 }
 

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

@@ -76,4 +76,3 @@ func (mr *MockJsonRestHandlerMockRecorder) Post(ctx, endpoint, headers, data, re
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Post", reflect.TypeOf((*MockJsonRestHandler)(nil).Post), ctx, endpoint, headers, data, resp)
 }
-