introducing deneb changes and blobs to builder (#12477)

2026-01-08 07:03:58 -05:00 · 2023-06-14 13:04:48 -05:00
parent bcdf1c92a7
commit 8a67f616f0
37 changed files with 2198 additions and 168 deletions
--- a/api/client/builder/BUILD.bazel
+++ b/api/client/builder/BUILD.bazel
@@ -11,12 +11,12 @@ go_library(
    importpath = "github.com/prysmaticlabs/prysm/v4/api/client/builder",
    visibility = ["//visibility:public"],
    deps = [
+        "//config/fieldparams:go_default_library",
        "//consensus-types:go_default_library",
        "//consensus-types/blocks:go_default_library",
        "//consensus-types/interfaces:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//encoding/bytesutil:go_default_library",
-        "//math:go_default_library",
        "//monitoring/tracing:go_default_library",
        "//network:go_default_library",
        "//network/authorization:go_default_library",
@@ -40,6 +40,7 @@ go_test(
    data = glob(["testdata/**"]),
    embed = [":go_default_library"],
    deps = [
+        "//config/fieldparams:go_default_library",
        "//config/params:go_default_library",
        "//consensus-types/blocks:go_default_library",
        "//consensus-types/primitives:go_default_library",
--- a/api/client/builder/bid.go
+++ b/api/client/builder/bid.go
@@ -1,14 +1,12 @@
 package builder

 import (
-	"math/big"
-
+	"github.com/pkg/errors"
 	ssz "github.com/prysmaticlabs/fastssz"
 	consensus_types "github.com/prysmaticlabs/prysm/v4/consensus-types"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v4/math"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v4/runtime/version"
 )
@@ -24,6 +22,7 @@ type SignedBid interface {
 // Bid is an interface describing the method set of a builder bid.
 type Bid interface {
 	Header() (interfaces.ExecutionData, error)
+	BlindedBlobsBundle() (*enginev1.BlindedBlobsBundle, error)
 	Value() []byte
 	Pubkey() []byte
 	Version() int
@@ -116,6 +115,11 @@ func (b builderBid) Header() (interfaces.ExecutionData, error) {
 	return blocks.WrappedExecutionPayloadHeader(b.p.Header)
 }

+// BlindedBlobsBundle --
+func (b builderBid) BlindedBlobsBundle() (*enginev1.BlindedBlobsBundle, error) {
+	return nil, errors.New("blinded blobs bundle not available before Deneb")
+}
+
 // Version --
 func (b builderBid) Version() int {
 	return version.Bellatrix
@@ -162,8 +166,12 @@ func WrappedBuilderBidCapella(p *ethpb.BuilderBidCapella) (Bid, error) {
 // Header returns the execution data interface.
 func (b builderBidCapella) Header() (interfaces.ExecutionData, error) {
 	// We have to convert big endian to little endian because the value is coming from the execution layer.
-	v := big.NewInt(0).SetBytes(bytesutil.ReverseByteOrder(b.p.Value))
-	return blocks.WrappedExecutionPayloadHeaderCapella(b.p.Header, math.WeiToGwei(v))
+	return blocks.WrappedExecutionPayloadHeaderCapella(b.p.Header, blocks.PayloadValueToGwei(b.p.Value))
+}
+
+// BlindedBlobsBundle --
+func (b builderBidCapella) BlindedBlobsBundle() (*enginev1.BlindedBlobsBundle, error) {
+	return nil, errors.New("blinded blobs bundle not available before Deneb")
 }

 // Version --
@@ -195,3 +203,90 @@ func (b builderBidCapella) HashTreeRoot() ([32]byte, error) {
 func (b builderBidCapella) HashTreeRootWith(hh *ssz.Hasher) error {
 	return b.p.HashTreeRootWith(hh)
 }
+
+type builderBidDeneb struct {
+	p *ethpb.BuilderBidDeneb
+}
+
+// WrappedBuilderBidDeneb is a constructor which wraps a protobuf bid into an interface.
+func WrappedBuilderBidDeneb(p *ethpb.BuilderBidDeneb) (Bid, error) {
+	w := builderBidDeneb{p: p}
+	if w.IsNil() {
+		return nil, consensus_types.ErrNilObjectWrapped
+	}
+	return w, nil
+}
+
+// Version --
+func (b builderBidDeneb) Version() int {
+	return version.Deneb
+}
+
+// Value --
+func (b builderBidDeneb) Value() []byte {
+	return b.p.Value
+}
+
+// Pubkey --
+func (b builderBidDeneb) Pubkey() []byte {
+	return b.p.Pubkey
+}
+
+// IsNil --
+func (b builderBidDeneb) IsNil() bool {
+	return b.p == nil
+}
+
+// HashTreeRoot --
+func (b builderBidDeneb) HashTreeRoot() ([32]byte, error) {
+	return b.p.HashTreeRoot()
+}
+
+// HashTreeRootWith --
+func (b builderBidDeneb) HashTreeRootWith(hh *ssz.Hasher) error {
+	return b.p.HashTreeRootWith(hh)
+}
+
+// Header --
+func (b builderBidDeneb) Header() (interfaces.ExecutionData, error) {
+	// We have to convert big endian to little endian because the value is coming from the execution layer.
+	return blocks.WrappedExecutionPayloadHeaderDeneb(b.p.Header, blocks.PayloadValueToGwei(b.p.Value))
+}
+
+// BlindedBlobsBundle --
+func (b builderBidDeneb) BlindedBlobsBundle() (*enginev1.BlindedBlobsBundle, error) {
+	return b.p.BlindedBlobsBundle, nil
+}
+
+type signedBuilderBidDeneb struct {
+	p *ethpb.SignedBuilderBidDeneb
+}
+
+// WrappedSignedBuilderBidDeneb is a constructor which wraps a protobuf signed bit into an interface.
+func WrappedSignedBuilderBidDeneb(p *ethpb.SignedBuilderBidDeneb) (SignedBid, error) {
+	w := signedBuilderBidDeneb{p: p}
+	if w.IsNil() {
+		return nil, consensus_types.ErrNilObjectWrapped
+	}
+	return w, nil
+}
+
+// Message --
+func (b signedBuilderBidDeneb) Message() (Bid, error) {
+	return WrappedBuilderBidDeneb(b.p.Message)
+}
+
+// Signature --
+func (b signedBuilderBidDeneb) Signature() []byte {
+	return b.p.Signature
+}
+
+// Version --
+func (b signedBuilderBidDeneb) Version() int {
+	return version.Deneb
+}
+
+// IsNil --
+func (b signedBuilderBidDeneb) IsNil() bool {
+	return b.p == nil
+}
--- a/api/client/builder/client.go
+++ b/api/client/builder/client.go
@@ -19,6 +19,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v4/monitoring/tracing"
 	"github.com/prysmaticlabs/prysm/v4/network"
 	"github.com/prysmaticlabs/prysm/v4/network/authorization"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v4/runtime/version"
 	log "github.com/sirupsen/logrus"
@@ -86,7 +87,7 @@ type BuilderClient interface {
 	NodeURL() string
 	GetHeader(ctx context.Context, slot primitives.Slot, parentHash [32]byte, pubkey [48]byte) (SignedBid, error)
 	RegisterValidator(ctx context.Context, svr []*ethpb.SignedValidatorRegistrationV1) error
-	SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, error)
+	SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock, blobs []*ethpb.SignedBlindedBlobSidecar) (interfaces.ExecutionData, *v1.BlobsBundle, error)
 	Status(ctx context.Context) error
 }

@@ -220,6 +221,16 @@ func (c *Client) GetHeader(ctx context.Context, slot primitives.Slot, parentHash
 		return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
 	}
 	switch strings.ToLower(v.Version) {
+	case strings.ToLower(version.String(version.Deneb)):
+		hr := &ExecHeaderResponseDeneb{}
+		if err := json.Unmarshal(hb, hr); err != nil {
+			return nil, errors.Wrapf(err, "error unmarshaling the builder GetHeader response, using slot=%d, parentHash=%#x, pubkey=%#x", slot, parentHash, pubkey)
+		}
+		p, err := hr.ToProto()
+		if err != nil {
+			return nil, errors.Wrapf(err, "could not extract proto message from header")
+		}
+		return WrappedSignedBuilderBidDeneb(p)
 	case strings.ToLower(version.String(version.Capella)):
 		hr := &ExecHeaderResponseCapella{}
 		if err := json.Unmarshal(hb, hr); err != nil {
@@ -274,20 +285,20 @@ func (c *Client) RegisterValidator(ctx context.Context, svr []*ethpb.SignedValid

 // SubmitBlindedBlock calls the builder API endpoint that binds the validator to the builder and submits the block.
 // The response is the full execution payload used to create the blinded block.
-func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, error) {
+func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock, blobs []*ethpb.SignedBlindedBlobSidecar) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
 	if !sb.IsBlinded() {
-		return nil, errNotBlinded
+		return nil, nil, errNotBlinded
 	}
 	switch sb.Version() {
 	case version.Bellatrix:
 		psb, err := sb.PbBlindedBellatrixBlock()
 		if err != nil {
-			return nil, errors.Wrapf(err, "could not get protobuf block")
+			return nil, nil, errors.Wrapf(err, "could not get protobuf block")
 		}
 		b := &SignedBlindedBeaconBlockBellatrix{SignedBlindedBeaconBlockBellatrix: psb}
 		body, err := json.Marshal(b)
 		if err != nil {
-			return nil, errors.Wrap(err, "error encoding the SignedBlindedBeaconBlockBellatrix value body in SubmitBlindedBlock")
+			return nil, nil, errors.Wrap(err, "error encoding the SignedBlindedBeaconBlockBellatrix value body in SubmitBlindedBlock")
 		}

 		versionOpt := func(r *http.Request) {
@@ -296,29 +307,33 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 		rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), versionOpt)

 		if err != nil {
-			return nil, errors.Wrap(err, "error posting the SignedBlindedBeaconBlockBellatrix to the builder api")
+			return nil, nil, errors.Wrap(err, "error posting the SignedBlindedBeaconBlockBellatrix to the builder api")
 		}
 		ep := &ExecPayloadResponse{}
 		if err := json.Unmarshal(rb, ep); err != nil {
-			return nil, errors.Wrap(err, "error unmarshaling the builder SubmitBlindedBlock response")
+			return nil, nil, errors.Wrap(err, "error unmarshaling the builder SubmitBlindedBlock response")
 		}
 		if strings.ToLower(ep.Version) != version.String(version.Bellatrix) {
-			return nil, errors.New("not a bellatrix payload")
+			return nil, nil, errors.New("not a bellatrix payload")
 		}
 		p, err := ep.ToProto()
 		if err != nil {
-			return nil, errors.Wrapf(err, "could not extract proto message from payload")
+			return nil, nil, errors.Wrapf(err, "could not extract proto message from payload")
 		}
-		return blocks.WrappedExecutionPayload(p)
+		payload, err := blocks.WrappedExecutionPayload(p)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "could not wrap execution payload in interface")
+		}
+		return payload, nil, nil
 	case version.Capella:
 		psb, err := sb.PbBlindedCapellaBlock()
 		if err != nil {
-			return nil, errors.Wrapf(err, "could not get protobuf block")
+			return nil, nil, errors.Wrapf(err, "could not get protobuf block")
 		}
 		b := &SignedBlindedBeaconBlockCapella{SignedBlindedBeaconBlockCapella: psb}
 		body, err := json.Marshal(b)
 		if err != nil {
-			return nil, errors.Wrap(err, "error encoding the SignedBlindedBeaconBlockCapella value body in SubmitBlindedBlockCapella")
+			return nil, nil, errors.Wrap(err, "error encoding the SignedBlindedBeaconBlockCapella value body in SubmitBlindedBlockCapella")
 		}

 		versionOpt := func(r *http.Request) {
@@ -327,22 +342,61 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 		rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), versionOpt)

 		if err != nil {
-			return nil, errors.Wrap(err, "error posting the SignedBlindedBeaconBlockCapella to the builder api")
+			return nil, nil, errors.Wrap(err, "error posting the SignedBlindedBeaconBlockCapella to the builder api")
 		}
 		ep := &ExecPayloadResponseCapella{}
 		if err := json.Unmarshal(rb, ep); err != nil {
-			return nil, errors.Wrap(err, "error unmarshaling the builder SubmitBlindedBlockCapella response")
+			return nil, nil, errors.Wrap(err, "error unmarshaling the builder SubmitBlindedBlockCapella response")
 		}
 		if strings.ToLower(ep.Version) != version.String(version.Capella) {
-			return nil, errors.New("not a capella payload")
+			return nil, nil, errors.New("not a capella payload")
 		}
 		p, err := ep.ToProto()
 		if err != nil {
-			return nil, errors.Wrapf(err, "could not extract proto message from payload")
+			return nil, nil, errors.Wrapf(err, "could not extract proto message from payload")
 		}
-		return blocks.WrappedExecutionPayloadCapella(p, 0)
+		payload, err := blocks.WrappedExecutionPayloadCapella(p, 0)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "could not wrap execution payload in interface")
+		}
+		return payload, nil, nil
+	case version.Deneb:
+		psb, err := sb.PbBlindedDenebBlock()
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "could not get protobuf block")
+		}
+
+		b := &ethpb.SignedBlindedBeaconBlockAndBlobsDeneb{Block: psb, Blobs: blobs}
+		body, err := json.Marshal(b)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "error encoding the SignedBlindedBeaconBlockDeneb value body in SubmitBlindedBlockDeneb")
+		}
+
+		versionOpt := func(r *http.Request) {
+			r.Header.Add("Eth-Consensus-Version", version.String(version.Deneb))
+		}
+		rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), versionOpt)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "error posting the SignedBlindedBeaconBlockDeneb to the builder api")
+		}
+		ep := &ExecPayloadResponseDeneb{}
+		if err := json.Unmarshal(rb, ep); err != nil {
+			return nil, nil, errors.Wrap(err, "error unmarshaling the builder SubmitBlindedBlockDeneb response")
+		}
+		if strings.ToLower(ep.Version) != version.String(version.Deneb) {
+			return nil, nil, errors.New("not a deneb payload")
+		}
+		p, blobBundle, err := ep.ToProto()
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "could not extract proto message from payload")
+		}
+		payload, err := blocks.WrappedExecutionPayloadDeneb(p, 0)
+		if err != nil {
+			return nil, nil, errors.Wrapf(err, "could not wrap execution payload in interface")
+		}
+		return payload, blobBundle, nil
 	default:
-		return nil, fmt.Errorf("unsupported block version %s", version.String(sb.Version()))
+		return nil, nil, fmt.Errorf("unsupported block version %s", version.String(sb.Version()))
 	}
 }

--- a/api/client/builder/client_test.go
+++ b/api/client/builder/client_test.go
@@ -12,7 +12,9 @@ import (
 	"strconv"
 	"testing"

+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/prysmaticlabs/go-bitfield"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v4/config/params"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
 	types "github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
@@ -125,7 +127,6 @@ func TestClient_GetHeader(t *testing.T) {
 	var slot types.Slot = 23
 	parentHash := ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
 	pubkey := ezDecode(t, "0x93247f2209abcacf57b75a51dafae777f9dd38bc7053d1af526f220a7489a6d3a2753e5f3e8b1cfe39b56f43611df74a")
-
 	t.Run("server error", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
@@ -236,6 +237,52 @@ func TestClient_GetHeader(t *testing.T) {
 		require.DeepEqual(t, bidValue, value.Bytes())
 		require.DeepEqual(t, big.NewInt(0).SetBytes(bidValue), value.Int)
 	})
+	t.Run("deneb", func(t *testing.T) {
+		hc := &http.Client{
+			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
+				require.Equal(t, expectedPath, r.URL.Path)
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(bytes.NewBufferString(testExampleHeaderResponseDeneb)),
+					Request:    r.Clone(ctx),
+				}, nil
+			}),
+		}
+		c := &Client{
+			hc:      hc,
+			baseURL: &url.URL{Host: "localhost:3500", Scheme: "http"},
+		}
+		h, err := c.GetHeader(ctx, slot, bytesutil.ToBytes32(parentHash), bytesutil.ToBytes48(pubkey))
+		require.NoError(t, err)
+		expectedWithdrawalsRoot := ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+		bid, err := h.Message()
+		require.NoError(t, err)
+		bidHeader, err := bid.Header()
+		require.NoError(t, err)
+		withdrawalsRoot, err := bidHeader.WithdrawalsRoot()
+		require.NoError(t, err)
+		require.Equal(t, true, bytes.Equal(expectedWithdrawalsRoot, withdrawalsRoot))
+		value, err := stringToUint256("652312848583266388373324160190187140051835877600158453279131187530910662656")
+		require.NoError(t, err)
+		require.Equal(t, fmt.Sprintf("%#x", value.SSZBytes()), fmt.Sprintf("%#x", bid.Value()))
+		bidValue := bytesutil.ReverseByteOrder(bid.Value())
+		require.DeepEqual(t, bidValue, value.Bytes())
+		require.DeepEqual(t, big.NewInt(0).SetBytes(bidValue), value.Int)
+		bundle, err := bid.BlindedBlobsBundle()
+		require.NoError(t, err)
+		require.Equal(t, len(bundle.BlobRoots) <= fieldparams.MaxBlobsPerBlock && len(bundle.BlobRoots) > 0, true)
+		for i := range bundle.BlobRoots {
+			require.Equal(t, len(bundle.BlobRoots[i]) == fieldparams.RootLength, true)
+		}
+		require.Equal(t, len(bundle.KzgCommitments) > 0, true)
+		for i := range bundle.KzgCommitments {
+			require.Equal(t, len(bundle.KzgCommitments[i]) == 48, true)
+		}
+		require.Equal(t, len(bundle.Proofs) > 0, true)
+		for i := range bundle.Proofs {
+			require.Equal(t, len(bundle.Proofs[i]) == 48, true)
+		}
+	})
 	t.Run("unsupported version", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
@@ -277,7 +324,7 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		}
 		sbbb, err := blocks.NewSignedBeaconBlock(testSignedBlindedBeaconBlockBellatrix(t))
 		require.NoError(t, err)
-		ep, err := c.SubmitBlindedBlock(ctx, sbbb)
+		ep, _, err := c.SubmitBlindedBlock(ctx, sbbb, nil)
 		require.NoError(t, err)
 		require.Equal(t, true, bytes.Equal(ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"), ep.ParentHash()))
 		bfpg, err := stringToUint256("452312848583266388373324160190187140051835877600158453279131187530910662656")
@@ -303,7 +350,7 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		}
 		sbb, err := blocks.NewSignedBeaconBlock(testSignedBlindedBeaconBlockCapella(t))
 		require.NoError(t, err)
-		ep, err := c.SubmitBlindedBlock(ctx, sbb)
+		ep, _, err := c.SubmitBlindedBlock(ctx, sbb, nil)
 		require.NoError(t, err)
 		withdrawals, err := ep.Withdrawals()
 		require.NoError(t, err)
@@ -313,6 +360,40 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		assert.DeepEqual(t, ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943"), withdrawals[0].Address)
 		assert.Equal(t, uint64(1), withdrawals[0].Amount)
 	})
+	t.Run("deneb", func(t *testing.T) {
+		hc := &http.Client{
+			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
+				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
+				require.Equal(t, "deneb", r.Header.Get("Eth-Consensus-Version"))
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(bytes.NewBufferString(testExampleExecutionPayloadDeneb)),
+					Request:    r.Clone(ctx),
+				}, nil
+			}),
+		}
+		c := &Client{
+			hc:      hc,
+			baseURL: &url.URL{Host: "localhost:3500", Scheme: "http"},
+		}
+		test := testSignedBlindedBeaconBlockAndBlobsDeneb(t)
+		sbb, err := blocks.NewSignedBeaconBlock(test.Block)
+		require.NoError(t, err)
+
+		ep, blobBundle, err := c.SubmitBlindedBlock(ctx, sbb, test.Blobs)
+		require.NoError(t, err)
+		withdrawals, err := ep.Withdrawals()
+		require.NoError(t, err)
+		require.Equal(t, 1, len(withdrawals))
+		assert.Equal(t, uint64(1), withdrawals[0].Index)
+		assert.Equal(t, types.ValidatorIndex(1), withdrawals[0].ValidatorIndex)
+		assert.DeepEqual(t, ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943"), withdrawals[0].Address)
+		assert.Equal(t, uint64(1), withdrawals[0].Amount)
+		require.NotNil(t, blobBundle)
+		require.Equal(t, hexutil.Encode(blobBundle.Blobs[0]), hexutil.Encode(make([]byte, fieldparams.BlobLength)))
+		require.Equal(t, hexutil.Encode(blobBundle.KzgCommitments[0]), "0x8dab030c51e16e84be9caab84ee3d0b8bbec1db4a0e4de76439da8424d9b957370a10a78851f97e4b54d2ce1ab0d686f")
+		require.Equal(t, hexutil.Encode(blobBundle.Proofs[0]), "0xb4021b0de10f743893d4f71e1bf830c019e832958efd6795baf2f83b8699a9eccc5dc99015d8d4d8ec370d0cc333c06a")
+	})
 	t.Run("mismatched versions, expected bellatrix got capella", func(t *testing.T) {
 		hc := &http.Client{
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
@@ -330,13 +411,13 @@ func TestSubmitBlindedBlock(t *testing.T) {
 		}
 		sbbb, err := blocks.NewSignedBeaconBlock(testSignedBlindedBeaconBlockBellatrix(t))
 		require.NoError(t, err)
-		_, err = c.SubmitBlindedBlock(ctx, sbbb)
+		_, _, err = c.SubmitBlindedBlock(ctx, sbbb, nil)
 		require.ErrorContains(t, "not a bellatrix payload", err)
 	})
 	t.Run("not blinded", func(t *testing.T) {
 		sbb, err := blocks.NewSignedBeaconBlock(&eth.SignedBeaconBlockBellatrix{Block: &eth.BeaconBlockBellatrix{Body: &eth.BeaconBlockBodyBellatrix{}}})
 		require.NoError(t, err)
-		_, err = (&Client{}).SubmitBlindedBlock(ctx, sbb)
+		_, _, err = (&Client{}).SubmitBlindedBlock(ctx, sbb, nil)
 		require.ErrorIs(t, err, errNotBlinded)
 	})
 }
@@ -626,6 +707,168 @@ func testSignedBlindedBeaconBlockCapella(t *testing.T) *eth.SignedBlindedBeaconB
 	}
 }

+func testSignedBlindedBeaconBlockAndBlobsDeneb(t *testing.T) *eth.SignedBlindedBeaconBlockAndBlobsDeneb {
+	return &eth.SignedBlindedBeaconBlockAndBlobsDeneb{
+		Block: &eth.SignedBlindedBeaconBlockDeneb{
+			Block: &eth.BlindedBeaconBlockDeneb{
+				Slot:          1,
+				ProposerIndex: 1,
+				ParentRoot:    ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+				StateRoot:     ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+				Body: &eth.BlindedBeaconBlockBodyDeneb{
+					RandaoReveal: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+					Eth1Data: &eth.Eth1Data{
+						DepositRoot:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						DepositCount: 1,
+						BlockHash:    ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+					},
+					Graffiti: ezDecode(t, "0xdeadbeefc0ffee"),
+					ProposerSlashings: []*eth.ProposerSlashing{
+						{
+							Header_1: &eth.SignedBeaconBlockHeader{
+								Header: &eth.BeaconBlockHeader{
+									Slot:          1,
+									ProposerIndex: 1,
+									ParentRoot:    ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									StateRoot:     ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									BodyRoot:      ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+								},
+								Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+							},
+							Header_2: &eth.SignedBeaconBlockHeader{
+								Header: &eth.BeaconBlockHeader{
+									Slot:          1,
+									ProposerIndex: 1,
+									ParentRoot:    ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									StateRoot:     ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									BodyRoot:      ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+								},
+								Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+							},
+						},
+					},
+					AttesterSlashings: []*eth.AttesterSlashing{
+						{
+							Attestation_1: &eth.IndexedAttestation{
+								AttestingIndices: []uint64{1},
+								Data: &eth.AttestationData{
+									Slot:            1,
+									CommitteeIndex:  1,
+									BeaconBlockRoot: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									Source: &eth.Checkpoint{
+										Epoch: 1,
+										Root:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									},
+									Target: &eth.Checkpoint{
+										Epoch: 1,
+										Root:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									},
+								},
+								Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+							},
+							Attestation_2: &eth.IndexedAttestation{
+								AttestingIndices: []uint64{1},
+								Data: &eth.AttestationData{
+									Slot:            1,
+									CommitteeIndex:  1,
+									BeaconBlockRoot: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									Source: &eth.Checkpoint{
+										Epoch: 1,
+										Root:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									},
+									Target: &eth.Checkpoint{
+										Epoch: 1,
+										Root:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+									},
+								},
+								Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+							},
+						},
+					},
+					Attestations: []*eth.Attestation{
+						{
+							AggregationBits: bitfield.Bitlist{0x01},
+							Data: &eth.AttestationData{
+								Slot:            1,
+								CommitteeIndex:  1,
+								BeaconBlockRoot: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+								Source: &eth.Checkpoint{
+									Epoch: 1,
+									Root:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+								},
+								Target: &eth.Checkpoint{
+									Epoch: 1,
+									Root:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+								},
+							},
+							Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+						},
+					},
+					Deposits: []*eth.Deposit{
+						{
+							Proof: [][]byte{ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")},
+							Data: &eth.Deposit_Data{
+								PublicKey:             ezDecode(t, "0x93247f2209abcacf57b75a51dafae777f9dd38bc7053d1af526f220a7489a6d3a2753e5f3e8b1cfe39b56f43611df74a"),
+								WithdrawalCredentials: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+								Amount:                1,
+								Signature:             ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+							},
+						},
+					},
+					VoluntaryExits: []*eth.SignedVoluntaryExit{
+						{
+							Exit: &eth.VoluntaryExit{
+								Epoch:          1,
+								ValidatorIndex: 1,
+							},
+							Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+						},
+					},
+					SyncAggregate: &eth.SyncAggregate{
+						SyncCommitteeSignature: make([]byte, 48),
+						SyncCommitteeBits:      bitfield.Bitvector512{0x01},
+					},
+					ExecutionPayloadHeader: &v1.ExecutionPayloadHeaderDeneb{
+						ParentHash:       ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						FeeRecipient:     ezDecode(t, "0xabcf8e0d4e9587369b2301d0790347320302cc09"),
+						StateRoot:        ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						ReceiptsRoot:     ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						LogsBloom:        ezDecode(t, "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"),
+						PrevRandao:       ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						BlockNumber:      1,
+						GasLimit:         1,
+						GasUsed:          1,
+						Timestamp:        1,
+						ExtraData:        ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						BaseFeePerGas:    []byte(strconv.FormatUint(1, 10)),
+						BlockHash:        ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						TransactionsRoot: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						WithdrawalsRoot:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+						DataGasUsed:      1,
+						ExcessDataGas:    1,
+					},
+				},
+			},
+			Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+		},
+		Blobs: []*eth.SignedBlindedBlobSidecar{
+			{
+				Message: &eth.BlindedBlobSidecar{
+					BlockRoot:       ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+					Index:           0,
+					Slot:            1,
+					BlockParentRoot: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+					ProposerIndex:   1,
+					BlobRoot:        ezDecode(t, "0x24564723180fcb3d994104538d351c8dcbde12d541676bb736cf678018ca4739"),
+					KzgCommitment:   ezDecode(t, "0x8dab030c51e16e84be9caab84ee3d0b8bbec1db4a0e4de76439da8424d9b957370a10a78851f97e4b54d2ce1ab0d686f"),
+					KzgProof:        ezDecode(t, "0xb4021b0de10f743893d4f71e1bf830c019e832958efd6795baf2f83b8699a9eccc5dc99015d8d4d8ec370d0cc333c06a"),
+				},
+				Signature: ezDecode(t, "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"),
+			},
+		},
+	}
+}
+
 func TestRequestLogger(t *testing.T) {
 	wo := WithObserver(&requestLogger{})
 	c, err := NewClient("localhost:3500", wo)
--- a/api/client/builder/testing/BUILD.bazel
+++ b/api/client/builder/testing/BUILD.bazel
@@ -10,6 +10,7 @@ go_library(
        "//consensus-types/interfaces:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//encoding/bytesutil:go_default_library",
+        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
    ],
 )
--- a/api/client/builder/testing/mock.go
+++ b/api/client/builder/testing/mock.go
@@ -7,6 +7,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 )

@@ -40,8 +41,8 @@ func (m MockClient) RegisterValidator(_ context.Context, svr []*ethpb.SignedVali
 }

 // SubmitBlindedBlock --
-func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, error) {
-	return nil, nil
+func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock, _ []*ethpb.SignedBlindedBlobSidecar) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
+	return nil, nil, nil
 }

 // Status --
--- a/api/client/builder/types.go
+++ b/api/client/builder/types.go
@@ -8,6 +8,7 @@ import (

 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
 	types "github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
 	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
@@ -1107,6 +1108,295 @@ func (b *BlindedBeaconBlockBodyCapella) MarshalJSON() ([]byte, error) {
 	})
 }

+// ExecHeaderResponseDeneb is the header response for builder API /eth/v1/builder/header/{slot}/{parent_hash}/{pubkey}.
+type ExecHeaderResponseDeneb struct {
+	Data struct {
+		Signature hexutil.Bytes    `json:"signature"`
+		Message   *BuilderBidDeneb `json:"message"`
+	} `json:"data"`
+}
+
+// ToProto creates a SignedBuilderBidDeneb Proto from ExecHeaderResponseDeneb.
+func (ehr *ExecHeaderResponseDeneb) ToProto() (*eth.SignedBuilderBidDeneb, error) {
+	bb, err := ehr.Data.Message.ToProto()
+	if err != nil {
+		return nil, err
+	}
+	return &eth.SignedBuilderBidDeneb{
+		Message:   bb,
+		Signature: bytesutil.SafeCopyBytes(ehr.Data.Signature),
+	}, nil
+}
+
+// ToProto creates a BuilderBidDeneb Proto from BuilderBidDeneb.
+func (bb *BuilderBidDeneb) ToProto() (*eth.BuilderBidDeneb, error) {
+	header, err := bb.Header.ToProto()
+	if err != nil {
+		return nil, err
+	}
+	bundle, err := bb.BlindedBlobsBundle.ToProto()
+	if err != nil {
+		return nil, err
+	}
+	return &eth.BuilderBidDeneb{
+		Header:             header,
+		BlindedBlobsBundle: bundle,
+		Value:              bytesutil.SafeCopyBytes(bb.Value.SSZBytes()),
+		Pubkey:             bytesutil.SafeCopyBytes(bb.Pubkey),
+	}, nil
+}
+
+// BuilderBidDeneb is a field of ExecHeaderResponseDeneb.
+type BuilderBidDeneb struct {
+	Header             *ExecutionPayloadHeaderDeneb `json:"header"`
+	BlindedBlobsBundle *BlindedBlobsBundle          `json:"blinded_blobs_bundle"`
+	Value              Uint256                      `json:"value"`
+	Pubkey             hexutil.Bytes                `json:"pubkey"`
+}
+
+// BlindedBlobsBundle is a field of BuilderBidDeneb and represents the blinded blobs of the associated header.
+type BlindedBlobsBundle struct {
+	KzgCommitments []hexutil.Bytes `json:"commitments"`
+	Proofs         []hexutil.Bytes `json:"proofs"`
+	BlobRoots      []hexutil.Bytes `json:"blob_roots"`
+}
+
+// ToProto creates a BlindedBlobsBundle Proto from BlindedBlobsBundle.
+func (r *BlindedBlobsBundle) ToProto() (*v1.BlindedBlobsBundle, error) {
+	kzg := make([][]byte, len(r.KzgCommitments))
+	for i := range kzg {
+		kzg[i] = bytesutil.SafeCopyBytes(r.KzgCommitments[i])
+	}
+
+	proofs := make([][]byte, len(r.Proofs))
+	for i := range proofs {
+		proofs[i] = bytesutil.SafeCopyBytes(r.Proofs[i])
+	}
+
+	blobRoots := make([][]byte, len(r.BlobRoots))
+	for i := range blobRoots {
+		blobRoots[i] = bytesutil.SafeCopyBytes(r.BlobRoots[i])
+	}
+
+	return &v1.BlindedBlobsBundle{
+		KzgCommitments: kzg,
+		Proofs:         proofs,
+		BlobRoots:      blobRoots,
+	}, nil
+}
+
+// ExecutionPayloadHeaderDeneb a field part of the BuilderBidDeneb.
+type ExecutionPayloadHeaderDeneb struct {
+	ParentHash       hexutil.Bytes `json:"parent_hash"`
+	FeeRecipient     hexutil.Bytes `json:"fee_recipient"`
+	StateRoot        hexutil.Bytes `json:"state_root"`
+	ReceiptsRoot     hexutil.Bytes `json:"receipts_root"`
+	LogsBloom        hexutil.Bytes `json:"logs_bloom"`
+	PrevRandao       hexutil.Bytes `json:"prev_randao"`
+	BlockNumber      Uint64String  `json:"block_number"`
+	GasLimit         Uint64String  `json:"gas_limit"`
+	GasUsed          Uint64String  `json:"gas_used"`
+	Timestamp        Uint64String  `json:"timestamp"`
+	ExtraData        hexutil.Bytes `json:"extra_data"`
+	BaseFeePerGas    Uint256       `json:"base_fee_per_gas"`
+	BlockHash        hexutil.Bytes `json:"block_hash"`
+	TransactionsRoot hexutil.Bytes `json:"transactions_root"`
+	WithdrawalsRoot  hexutil.Bytes `json:"withdrawals_root"`
+	DataGasUsed      Uint64String  `json:"data_gas_used"`   // new in deneb
+	ExcessDataGas    Uint64String  `json:"excess_data_gas"` // new in deneb
+	*v1.ExecutionPayloadHeaderDeneb
+}
+
+// MarshalJSON returns a JSON byte array representing the ExecutionPayloadHeaderDeneb struct.
+func (h *ExecutionPayloadHeaderDeneb) MarshalJSON() ([]byte, error) {
+	type MarshalCaller ExecutionPayloadHeaderDeneb
+	baseFeePerGas, err := sszBytesToUint256(h.ExecutionPayloadHeaderDeneb.BaseFeePerGas)
+	if err != nil {
+		return []byte{}, errors.Wrapf(err, "invalid BaseFeePerGas")
+	}
+	return json.Marshal(&MarshalCaller{
+		ParentHash:       h.ExecutionPayloadHeaderDeneb.ParentHash,
+		FeeRecipient:     h.ExecutionPayloadHeaderDeneb.FeeRecipient,
+		StateRoot:        h.ExecutionPayloadHeaderDeneb.StateRoot,
+		ReceiptsRoot:     h.ExecutionPayloadHeaderDeneb.ReceiptsRoot,
+		LogsBloom:        h.ExecutionPayloadHeaderDeneb.LogsBloom,
+		PrevRandao:       h.ExecutionPayloadHeaderDeneb.PrevRandao,
+		BlockNumber:      Uint64String(h.ExecutionPayloadHeaderDeneb.BlockNumber),
+		GasLimit:         Uint64String(h.ExecutionPayloadHeaderDeneb.GasLimit),
+		GasUsed:          Uint64String(h.ExecutionPayloadHeaderDeneb.GasUsed),
+		Timestamp:        Uint64String(h.ExecutionPayloadHeaderDeneb.Timestamp),
+		ExtraData:        h.ExecutionPayloadHeaderDeneb.ExtraData,
+		BaseFeePerGas:    baseFeePerGas,
+		BlockHash:        h.ExecutionPayloadHeaderDeneb.BlockHash,
+		TransactionsRoot: h.ExecutionPayloadHeaderDeneb.TransactionsRoot,
+		WithdrawalsRoot:  h.ExecutionPayloadHeaderDeneb.WithdrawalsRoot,
+		DataGasUsed:      Uint64String(h.ExecutionPayloadHeaderDeneb.DataGasUsed),
+		ExcessDataGas:    Uint64String(h.ExecutionPayloadHeaderDeneb.ExcessDataGas),
+	})
+}
+
+// UnmarshalJSON takes in a byte array and unmarshals the value into ExecutionPayloadHeaderDeneb.
+func (h *ExecutionPayloadHeaderDeneb) UnmarshalJSON(b []byte) error {
+	type UnmarshalCaller ExecutionPayloadHeaderDeneb
+	uc := &UnmarshalCaller{}
+	if err := json.Unmarshal(b, uc); err != nil {
+		return err
+	}
+	ep := ExecutionPayloadHeaderDeneb(*uc)
+	*h = ep
+	var err error
+	h.ExecutionPayloadHeaderDeneb, err = h.ToProto()
+	return err
+}
+
+// ToProto returns a ExecutionPayloadHeaderDeneb Proto object.
+func (h *ExecutionPayloadHeaderDeneb) ToProto() (*v1.ExecutionPayloadHeaderDeneb, error) {
+	return &v1.ExecutionPayloadHeaderDeneb{
+		ParentHash:       bytesutil.SafeCopyBytes(h.ParentHash),
+		FeeRecipient:     bytesutil.SafeCopyBytes(h.FeeRecipient),
+		StateRoot:        bytesutil.SafeCopyBytes(h.StateRoot),
+		ReceiptsRoot:     bytesutil.SafeCopyBytes(h.ReceiptsRoot),
+		LogsBloom:        bytesutil.SafeCopyBytes(h.LogsBloom),
+		PrevRandao:       bytesutil.SafeCopyBytes(h.PrevRandao),
+		BlockNumber:      uint64(h.BlockNumber),
+		GasLimit:         uint64(h.GasLimit),
+		GasUsed:          uint64(h.GasUsed),
+		Timestamp:        uint64(h.Timestamp),
+		ExtraData:        bytesutil.SafeCopyBytes(h.ExtraData),
+		BaseFeePerGas:    bytesutil.SafeCopyBytes(h.BaseFeePerGas.SSZBytes()),
+		BlockHash:        bytesutil.SafeCopyBytes(h.BlockHash),
+		TransactionsRoot: bytesutil.SafeCopyBytes(h.TransactionsRoot),
+		WithdrawalsRoot:  bytesutil.SafeCopyBytes(h.WithdrawalsRoot),
+		DataGasUsed:      uint64(h.DataGasUsed),
+		ExcessDataGas:    uint64(h.ExcessDataGas),
+	}, nil
+}
+
+// ExecPayloadResponseDeneb the response to the build API /eth/v1/builder/blinded_blocks that includes the version, execution payload object , and blobs bundle object.
+type ExecPayloadResponseDeneb struct {
+	Version string                               `json:"version"`
+	Data    *ExecutionPayloadDenebAndBlobsBundle `json:"data"`
+}
+
+// ExecutionPayloadDenebAndBlobsBundle the main field used in ExecPayloadResponseDeneb.
+type ExecutionPayloadDenebAndBlobsBundle struct {
+	ExecutionPayload *ExecutionPayloadDeneb `json:"execution_payload"`
+	BlobsBundle      *BlobsBundle           `json:"blobs_bundle"`
+}
+
+// ExecutionPayloadDeneb is a field used in ExecutionPayloadDenebAndBlobsBundle.
+type ExecutionPayloadDeneb struct {
+	ParentHash    hexutil.Bytes   `json:"parent_hash"`
+	FeeRecipient  hexutil.Bytes   `json:"fee_recipient"`
+	StateRoot     hexutil.Bytes   `json:"state_root"`
+	ReceiptsRoot  hexutil.Bytes   `json:"receipts_root"`
+	LogsBloom     hexutil.Bytes   `json:"logs_bloom"`
+	PrevRandao    hexutil.Bytes   `json:"prev_randao"`
+	BlockNumber   Uint64String    `json:"block_number"`
+	GasLimit      Uint64String    `json:"gas_limit"`
+	GasUsed       Uint64String    `json:"gas_used"`
+	Timestamp     Uint64String    `json:"timestamp"`
+	ExtraData     hexutil.Bytes   `json:"extra_data"`
+	BaseFeePerGas Uint256         `json:"base_fee_per_gas"`
+	BlockHash     hexutil.Bytes   `json:"block_hash"`
+	Transactions  []hexutil.Bytes `json:"transactions"`
+	Withdrawals   []Withdrawal    `json:"withdrawals"`
+	DataGasUsed   Uint64String    `json:"data_gas_used"`   // new in deneb
+	ExcessDataGas Uint64String    `json:"excess_data_gas"` // new in deneb
+}
+
+// BlobsBundle is a field in ExecutionPayloadDenebAndBlobsBundle.
+type BlobsBundle struct {
+	Commitments []hexutil.Bytes `json:"commitments"`
+	Proofs      []hexutil.Bytes `json:"proofs"`
+	Blobs       []hexutil.Bytes `json:"blobs"`
+}
+
+// ToProto returns a BlobsBundle Proto.
+func (b BlobsBundle) ToProto() (*v1.BlobsBundle, error) {
+	commitments := make([][]byte, len(b.Commitments))
+	for i := range b.Commitments {
+		if len(b.Commitments[i]) != fieldparams.BLSPubkeyLength {
+			return nil, fmt.Errorf("commitment length %d is not %d", len(b.Commitments[i]), fieldparams.BLSPubkeyLength)
+		}
+		commitments[i] = bytesutil.SafeCopyBytes(b.Commitments[i])
+	}
+	proofs := make([][]byte, len(b.Proofs))
+	for i := range b.Proofs {
+		if len(b.Proofs[i]) != fieldparams.BLSPubkeyLength {
+			return nil, fmt.Errorf("proof length %d is not %d", len(b.Proofs[i]), fieldparams.BLSPubkeyLength)
+		}
+		proofs[i] = bytesutil.SafeCopyBytes(b.Proofs[i])
+	}
+	if len(b.Blobs) > fieldparams.MaxBlobsPerBlock {
+		return nil, fmt.Errorf("blobs length %d is more than max %d", len(b.Blobs), fieldparams.MaxBlobsPerBlock)
+	}
+	blobs := make([][]byte, len(b.Blobs))
+	for i := range b.Blobs {
+		if len(b.Blobs[i]) != fieldparams.BlobLength {
+			return nil, fmt.Errorf("blob length %d is not %d", len(b.Blobs[i]), fieldparams.BlobLength)
+		}
+		blobs[i] = bytesutil.SafeCopyBytes(b.Blobs[i])
+	}
+	return &v1.BlobsBundle{
+		KzgCommitments: commitments,
+		Proofs:         proofs,
+		Blobs:          blobs,
+	}, nil
+}
+
+// ToProto returns ExecutionPayloadDeneb Proto and BlobsBundle Proto separately.
+func (r *ExecPayloadResponseDeneb) ToProto() (*v1.ExecutionPayloadDeneb, *v1.BlobsBundle, error) {
+	if r.Data == nil {
+		return nil, nil, errors.New("data field in response is empty")
+	}
+	payload, err := r.Data.ExecutionPayload.ToProto()
+	if err != nil {
+		return nil, nil, err
+	}
+	bundle, err := r.Data.BlobsBundle.ToProto()
+	if err != nil {
+		return nil, nil, err
+	}
+	return payload, bundle, nil
+}
+
+// ToProto returns the ExecutionPayloadDeneb Proto.
+func (p *ExecutionPayloadDeneb) ToProto() (*v1.ExecutionPayloadDeneb, error) {
+	txs := make([][]byte, len(p.Transactions))
+	for i := range p.Transactions {
+		txs[i] = bytesutil.SafeCopyBytes(p.Transactions[i])
+	}
+	withdrawals := make([]*v1.Withdrawal, len(p.Withdrawals))
+	for i, w := range p.Withdrawals {
+		withdrawals[i] = &v1.Withdrawal{
+			Index:          w.Index.Uint64(),
+			ValidatorIndex: types.ValidatorIndex(w.ValidatorIndex.Uint64()),
+			Address:        bytesutil.SafeCopyBytes(w.Address),
+			Amount:         w.Amount.Uint64(),
+		}
+	}
+	return &v1.ExecutionPayloadDeneb{
+		ParentHash:    bytesutil.SafeCopyBytes(p.ParentHash),
+		FeeRecipient:  bytesutil.SafeCopyBytes(p.FeeRecipient),
+		StateRoot:     bytesutil.SafeCopyBytes(p.StateRoot),
+		ReceiptsRoot:  bytesutil.SafeCopyBytes(p.ReceiptsRoot),
+		LogsBloom:     bytesutil.SafeCopyBytes(p.LogsBloom),
+		PrevRandao:    bytesutil.SafeCopyBytes(p.PrevRandao),
+		BlockNumber:   uint64(p.BlockNumber),
+		GasLimit:      uint64(p.GasLimit),
+		GasUsed:       uint64(p.GasUsed),
+		Timestamp:     uint64(p.Timestamp),
+		ExtraData:     bytesutil.SafeCopyBytes(p.ExtraData),
+		BaseFeePerGas: bytesutil.SafeCopyBytes(p.BaseFeePerGas.SSZBytes()),
+		BlockHash:     bytesutil.SafeCopyBytes(p.BlockHash),
+		Transactions:  txs,
+		Withdrawals:   withdrawals,
+		DataGasUsed:   uint64(p.DataGasUsed),
+		ExcessDataGas: uint64(p.ExcessDataGas),
+	}, nil
+}
+
 // ErrorMessage is a JSON representation of the builder API's returned error message.
 type ErrorMessage struct {
 	Code        int      `json:"code"`
--- a/api/client/builder/types_test.go
+++ b/api/client/builder/types_test.go
@@ -14,6 +14,7 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/golang/protobuf/proto"
 	"github.com/prysmaticlabs/go-bitfield"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
 	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v4/testing/assert"
@@ -116,6 +117,47 @@ var testExampleHeaderResponseCapella = `{
  }
 }`

+var testExampleHeaderResponseDeneb = `{
+  "version": "deneb",
+  "data": {
+    "message": {
+      "header": {
+        "parent_hash": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "fee_recipient": "0xabcf8e0d4e9587369b2301d0790347320302cc09",
+        "state_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "receipts_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "logs_bloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+        "prev_randao": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "block_number": "1",
+        "gas_limit": "1",
+        "gas_used": "1",
+        "timestamp": "1",
+        "extra_data": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "base_fee_per_gas": "452312848583266388373324160190187140051835877600158453279131187530910662656",
+		"block_hash": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "transactions_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+        "withdrawals_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"data_gas_used": "1",	
+		"excess_data_gas": "1"	
+      },
+      "blinded_blobs_bundle": {
+        "commitments": [
+          "0x8dab030c51e16e84be9caab84ee3d0b8bbec1db4a0e4de76439da8424d9b957370a10a78851f97e4b54d2ce1ab0d686f"
+        ],
+        "proofs": [
+          "0xb4021b0de10f743893d4f71e1bf830c019e832958efd6795baf2f83b8699a9eccc5dc99015d8d4d8ec370d0cc333c06a"
+        ],
+        "blob_roots": [
+          "0x24564723180fcb3d994104538d351c8dcbde12d541676bb736cf678018ca4739"
+        ]
+      },
+      "value": "652312848583266388373324160190187140051835877600158453279131187530910662656",
+      "pubkey": "0x93247f2209abcacf57b75a51dafae777f9dd38bc7053d1af526f220a7489a6d3a2753e5f3e8b1cfe39b56f43611df74a"
+    },
+    "signature": "0x1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505cc411d61252fb6cb3fa0017b679f8bb2305b26a285fa2737f175668d0dff91cc1b66ac1fb663c9bc59509846d6ec05345bd908eda73e670af888da41af171505"
+  }
+}`
+
 var testExampleHeaderResponseUnknownVersion = `{
  "version": "bad",
  "data": {
@@ -518,6 +560,51 @@ var testExampleExecutionPayloadCapella = `{
  }
 }`

+var testExampleExecutionPayloadDeneb = fmt.Sprintf(`{
+  "version": "deneb",
+  "data": {
+	"execution_payload":{
+		"parent_hash": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"fee_recipient": "0xabcf8e0d4e9587369b2301d0790347320302cc09",
+		"state_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"receipts_root": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"logs_bloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+		"prev_randao": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"block_number": "1",
+		"gas_limit": "1",
+		"gas_used": "1",
+		"timestamp": "1",
+		"extra_data": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"base_fee_per_gas": "452312848583266388373324160190187140051835877600158453279131187530910662656",
+		"block_hash": "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+		"transactions": [
+		  "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
+		],
+		"withdrawals": [
+		  {
+			"index": "1",
+			"validator_index": "1",
+			"address": "0xcf8e0d4e9587369b2301d0790347320302cc0943",
+			"amount": "1"
+		  }
+		],
+		"data_gas_used": "2",
+ 		"excess_data_gas": "3"
+	  },
+	"blobs_bundle": {
+      "commitments": [
+        "0x8dab030c51e16e84be9caab84ee3d0b8bbec1db4a0e4de76439da8424d9b957370a10a78851f97e4b54d2ce1ab0d686f"
+      ],
+      "proofs": [
+        "0xb4021b0de10f743893d4f71e1bf830c019e832958efd6795baf2f83b8699a9eccc5dc99015d8d4d8ec370d0cc333c06a"
+      ],
+      "blobs": [
+        "%s"
+      ]
+    }
+  }
+}`, hexutil.Encode(make([]byte, fieldparams.BlobLength)))
+
 func TestExecutionPayloadResponseUnmarshal(t *testing.T) {
 	epr := &ExecPayloadResponse{}
 	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayload), epr))
@@ -689,6 +776,107 @@ func TestExecutionPayloadResponseCapellaUnmarshal(t *testing.T) {
 	assert.Equal(t, uint64(1), w.Amount.Uint64())
 }

+func TestExecutionPayloadResponseDenebUnmarshal(t *testing.T) {
+	epr := &ExecPayloadResponseDeneb{}
+	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayloadDeneb), epr))
+	cases := []struct {
+		expected string
+		actual   string
+		name     string
+	}{
+		{
+			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ParentHash),
+			name:     "ExecPayloadResponse.ExecutionPayload.ParentHash",
+		},
+		{
+			expected: "0xabcf8e0d4e9587369b2301d0790347320302cc09",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.FeeRecipient),
+			name:     "ExecPayloadResponse.ExecutionPayload.FeeRecipient",
+		},
+		{
+			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.StateRoot),
+			name:     "ExecPayloadResponse.ExecutionPayload.StateRoot",
+		},
+		{
+			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ReceiptsRoot),
+			name:     "ExecPayloadResponse.ExecutionPayload.ReceiptsRoot",
+		},
+		{
+			expected: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.LogsBloom),
+			name:     "ExecPayloadResponse.ExecutionPayload.LogsBloom",
+		},
+		{
+			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.PrevRandao),
+			name:     "ExecPayloadResponse.ExecutionPayload.PrevRandao",
+		},
+		{
+			expected: "1",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BlockNumber),
+			name:     "ExecPayloadResponse.ExecutionPayload.BlockNumber",
+		},
+		{
+			expected: "1",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.GasLimit),
+			name:     "ExecPayloadResponse.ExecutionPayload.GasLimit",
+		},
+		{
+			expected: "1",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.GasUsed),
+			name:     "ExecPayloadResponse.ExecutionPayload.GasUsed",
+		},
+		{
+			expected: "1",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.Timestamp),
+			name:     "ExecPayloadResponse.ExecutionPayload.Timestamp",
+		},
+		{
+			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.ExtraData),
+			name:     "ExecPayloadResponse.ExecutionPayload.ExtraData",
+		},
+		{
+			expected: "452312848583266388373324160190187140051835877600158453279131187530910662656",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.BaseFeePerGas),
+			name:     "ExecPayloadResponse.ExecutionPayload.BaseFeePerGas",
+		},
+		{
+			expected: "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2",
+			actual:   hexutil.Encode(epr.Data.ExecutionPayload.BlockHash),
+			name:     "ExecPayloadResponse.ExecutionPayload.BlockHash",
+		},
+		{
+			expected: "2",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.DataGasUsed),
+			name:     "ExecPayloadResponse.ExecutionPayload.DataGasUsed",
+		},
+		{
+			expected: "3",
+			actual:   fmt.Sprintf("%d", epr.Data.ExecutionPayload.ExcessDataGas),
+			name:     "ExecPayloadResponse.ExecutionPayload.ExcessDataGas",
+		},
+	}
+	for _, c := range cases {
+		require.Equal(t, c.expected, c.actual, fmt.Sprintf("unexpected value for field %s", c.name))
+	}
+	require.Equal(t, 1, len(epr.Data.ExecutionPayload.Transactions))
+	txHash := "0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86"
+	require.Equal(t, txHash, hexutil.Encode(epr.Data.ExecutionPayload.Transactions[0]))
+
+	require.Equal(t, 1, len(epr.Data.ExecutionPayload.Withdrawals))
+	w := epr.Data.ExecutionPayload.Withdrawals[0]
+	assert.Equal(t, uint64(1), w.Index.Uint64())
+	assert.Equal(t, uint64(1), w.ValidatorIndex.Uint64())
+	assert.DeepEqual(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943", w.Address.String())
+	assert.Equal(t, uint64(1), w.Amount.Uint64())
+	assert.Equal(t, uint64(2), uint64(epr.Data.ExecutionPayload.DataGasUsed))
+	assert.Equal(t, uint64(3), uint64(epr.Data.ExecutionPayload.ExcessDataGas))
+}
+
 func TestExecutionPayloadResponseToProto(t *testing.T) {
 	hr := &ExecPayloadResponse{}
 	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayload), hr))
@@ -796,6 +984,85 @@ func TestExecutionPayloadResponseCapellaToProto(t *testing.T) {

 }

+func TestExecutionPayloadResponseDenebToProto(t *testing.T) {
+	hr := &ExecPayloadResponseDeneb{}
+	require.NoError(t, json.Unmarshal([]byte(testExampleExecutionPayloadDeneb), hr))
+	p, blobsBundle, err := hr.ToProto()
+	require.NoError(t, err)
+
+	parentHash, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+	require.NoError(t, err)
+	feeRecipient, err := hexutil.Decode("0xabcf8e0d4e9587369b2301d0790347320302cc09")
+	require.NoError(t, err)
+	stateRoot, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+	require.NoError(t, err)
+	receiptsRoot, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+	require.NoError(t, err)
+	logsBloom, err := hexutil.Decode("0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
+	require.NoError(t, err)
+	prevRandao, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+	require.NoError(t, err)
+	extraData, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+	require.NoError(t, err)
+	blockHash, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2")
+	require.NoError(t, err)
+
+	tx, err := hexutil.Decode("0x02f878831469668303f51d843b9ac9f9843b9aca0082520894c93269b73096998db66be0441e836d873535cb9c8894a19041886f000080c001a031cc29234036afbf9a1fb9476b463367cb1f957ac0b919b69bbc798436e604aaa018c4e9c3914eb27aadd0b91e10b18655739fcf8c1fc398763a9f1beecb8ddc86")
+	require.NoError(t, err)
+	txList := [][]byte{tx}
+	address, err := hexutil.Decode("0xcf8e0d4e9587369b2301d0790347320302cc0943")
+	require.NoError(t, err)
+
+	bfpg, err := stringToUint256("452312848583266388373324160190187140051835877600158453279131187530910662656")
+	require.NoError(t, err)
+	expected := &v1.ExecutionPayloadDeneb{
+		ParentHash:    parentHash,
+		FeeRecipient:  feeRecipient,
+		StateRoot:     stateRoot,
+		ReceiptsRoot:  receiptsRoot,
+		LogsBloom:     logsBloom,
+		PrevRandao:    prevRandao,
+		BlockNumber:   1,
+		GasLimit:      1,
+		GasUsed:       1,
+		Timestamp:     1,
+		ExtraData:     extraData,
+		BaseFeePerGas: bfpg.SSZBytes(),
+		BlockHash:     blockHash,
+		Transactions:  txList,
+		Withdrawals: []*v1.Withdrawal{
+			{
+				Index:          1,
+				ValidatorIndex: 1,
+				Address:        address,
+				Amount:         1,
+			},
+		},
+		DataGasUsed:   2,
+		ExcessDataGas: 3,
+	}
+	require.DeepEqual(t, expected, p)
+	commitment, err := hexutil.Decode("0x8dab030c51e16e84be9caab84ee3d0b8bbec1db4a0e4de76439da8424d9b957370a10a78851f97e4b54d2ce1ab0d686f")
+	require.NoError(t, err)
+	proof, err := hexutil.Decode("0xb4021b0de10f743893d4f71e1bf830c019e832958efd6795baf2f83b8699a9eccc5dc99015d8d4d8ec370d0cc333c06a")
+	require.NoError(t, err)
+
+	expectedBlobs := &v1.BlobsBundle{
+		KzgCommitments: [][]byte{
+			commitment,
+		},
+		Proofs: [][]byte{
+			proof,
+		},
+		Blobs: [][]byte{
+			make([]byte, fieldparams.BlobLength),
+		},
+	}
+
+	require.DeepEqual(t, blobsBundle, expectedBlobs)
+
+}
+
 func pbEth1Data() *eth.Eth1Data {
 	return &eth.Eth1Data{
 		DepositRoot:  make([]byte, 32),
@@ -1026,6 +1293,30 @@ func pbExecutionPayloadHeaderCapella(t *testing.T) *v1.ExecutionPayloadHeaderCap
 	}
 }

+func pbExecutionPayloadHeaderDeneb(t *testing.T) *v1.ExecutionPayloadHeaderDeneb {
+	bfpg, err := stringToUint256("452312848583266388373324160190187140051835877600158453279131187530910662656")
+	require.NoError(t, err)
+	return &v1.ExecutionPayloadHeaderDeneb{
+		ParentHash:       ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		FeeRecipient:     ezDecode(t, "0xabcf8e0d4e9587369b2301d0790347320302cc09"),
+		StateRoot:        ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		ReceiptsRoot:     ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		LogsBloom:        ezDecode(t, "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"),
+		PrevRandao:       ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		BlockNumber:      1,
+		GasLimit:         1,
+		GasUsed:          1,
+		Timestamp:        1,
+		ExtraData:        ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		BaseFeePerGas:    bfpg.SSZBytes(),
+		BlockHash:        ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		TransactionsRoot: ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		WithdrawalsRoot:  ezDecode(t, "0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2"),
+		DataGasUsed:      1,
+		ExcessDataGas:    1,
+	}
+}
+
 func TestExecutionPayloadHeader_MarshalJSON(t *testing.T) {
 	h := &ExecutionPayloadHeader{
 		ExecutionPayloadHeader: pbExecutionPayloadHeader(t),
@@ -1046,6 +1337,16 @@ func TestExecutionPayloadHeaderCapella_MarshalJSON(t *testing.T) {
 	require.Equal(t, expected, string(b))
 }

+func TestExecutionPayloadHeaderDeneb_MarshalJSON(t *testing.T) {
+	h := &ExecutionPayloadHeaderDeneb{
+		ExecutionPayloadHeaderDeneb: pbExecutionPayloadHeaderDeneb(t),
+	}
+	b, err := json.Marshal(h)
+	require.NoError(t, err)
+	expected := `{"parent_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","fee_recipient":"0xabcf8e0d4e9587369b2301d0790347320302cc09","state_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","receipts_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","logs_bloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","prev_randao":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","block_number":"1","gas_limit":"1","gas_used":"1","timestamp":"1","extra_data":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","base_fee_per_gas":"452312848583266388373324160190187140051835877600158453279131187530910662656","block_hash":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","transactions_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","withdrawals_root":"0xcf8e0d4e9587369b2301d0790347320302cc0943d5a1884560367e8208d920f2","data_gas_used":"1","excess_data_gas":"1"}`
+	require.Equal(t, expected, string(b))
+}
+
 var testBuilderBid = `{
    "version":"bellatrix",
 	"data":{
--- a/beacon-chain/builder/BUILD.bazel
+++ b/beacon-chain/builder/BUILD.bazel
@@ -15,10 +15,12 @@ go_library(
        "//beacon-chain/cache:go_default_library",
        "//beacon-chain/db:go_default_library",
        "//cmd/beacon-chain/flags:go_default_library",
+        "//config/fieldparams:go_default_library",
        "//consensus-types/interfaces:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//encoding/bytesutil:go_default_library",
        "//monitoring/tracing:go_default_library",
+        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "@com_github_pkg_errors//:go_default_library",
        "@com_github_prometheus_client_golang//prometheus:go_default_library",
--- a/beacon-chain/builder/service.go
+++ b/beacon-chain/builder/service.go
@@ -2,6 +2,7 @@ package builder

 import (
 	"context"
+	"fmt"
 	"reflect"
 	"time"

@@ -10,10 +11,12 @@ import (
 	"github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain"
 	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
 	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v4/monitoring/tracing"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	log "github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
@@ -24,7 +27,7 @@ var ErrNoBuilder = errors.New("builder endpoint not configured")

 // BlockBuilder defines the interface for interacting with the block builder
 type BlockBuilder interface {
-	SubmitBlindedBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, error)
+	SubmitBlindedBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blobs []*ethpb.SignedBlindedBlobSidecar) (interfaces.ExecutionData, *v1.BlobsBundle, error)
 	GetHeader(ctx context.Context, slot primitives.Slot, parentHash [32]byte, pubKey [48]byte) (builder.SignedBid, error)
 	RegisterValidator(ctx context.Context, reg []*ethpb.SignedValidatorRegistrationV1) error
 	RegistrationByValidatorID(ctx context.Context, id primitives.ValidatorIndex) (*ethpb.ValidatorRegistrationV1, error)
@@ -87,7 +90,7 @@ func (s *Service) Stop() error {
 }

 // SubmitBlindedBlock submits a blinded block to the builder relay network.
-func (s *Service) SubmitBlindedBlock(ctx context.Context, b interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, error) {
+func (s *Service) SubmitBlindedBlock(ctx context.Context, b interfaces.ReadOnlySignedBeaconBlock, blobs []*ethpb.SignedBlindedBlobSidecar) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
 	ctx, span := trace.StartSpan(ctx, "builder.SubmitBlindedBlock")
 	defer span.End()
 	start := time.Now()
@@ -95,10 +98,13 @@ func (s *Service) SubmitBlindedBlock(ctx context.Context, b interfaces.ReadOnlyS
 		submitBlindedBlockLatency.Observe(float64(time.Since(start).Milliseconds()))
 	}()
 	if s.c == nil {
-		return nil, ErrNoBuilder
+		return nil, nil, ErrNoBuilder
+	}
+	if uint64(len(blobs)) > fieldparams.MaxBlobsPerBlock {
+		return nil, nil, fmt.Errorf("blob count %d beyond max limit of %d", len(blobs), fieldparams.MaxBlobsPerBlock)
 	}

-	return s.c.SubmitBlindedBlock(ctx, b)
+	return s.c.SubmitBlindedBlock(ctx, b, blobs)
 }

 // GetHeader retrieves the header for a given slot and parent hash from the builder relay network.
--- a/beacon-chain/builder/service_test.go
+++ b/beacon-chain/builder/service_test.go
@@ -62,7 +62,7 @@ func Test_BuilderMethodsWithouClient(t *testing.T) {
 	_, err = s.GetHeader(context.Background(), 0, [32]byte{}, [48]byte{})
 	assert.ErrorContains(t, ErrNoBuilder.Error(), err)

-	_, err = s.SubmitBlindedBlock(context.Background(), nil)
+	_, _, err = s.SubmitBlindedBlock(context.Background(), nil, nil)
 	assert.ErrorContains(t, ErrNoBuilder.Error(), err)

 	err = s.RegisterValidator(context.Background(), nil)
--- a/beacon-chain/builder/testing/mock.go
+++ b/beacon-chain/builder/testing/mock.go
@@ -26,9 +26,12 @@ type MockBuilderService struct {
 	HasConfigured         bool
 	Payload               *v1.ExecutionPayload
 	PayloadCapella        *v1.ExecutionPayloadCapella
+	PayloadDeneb          *v1.ExecutionPayloadDeneb
+	BlobBundle            *v1.BlobsBundle
 	ErrSubmitBlindedBlock error
 	Bid                   *ethpb.SignedBuilderBid
 	BidCapella            *ethpb.SignedBuilderBidCapella
+	BidDeneb              *ethpb.SignedBuilderBidDeneb
 	RegistrationCache     *cache.RegistrationCache
 	ErrGetHeader          error
 	ErrRegisterValidator  error
@@ -41,23 +44,34 @@ func (s *MockBuilderService) Configured() bool {
 }

 // SubmitBlindedBlock for mocking.
-func (s *MockBuilderService) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, error) {
+func (s *MockBuilderService) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock, _ []*ethpb.SignedBlindedBlobSidecar) (interfaces.ExecutionData, *v1.BlobsBundle, error) {
 	if s.Payload != nil {
 		w, err := blocks.WrappedExecutionPayload(s.Payload)
 		if err != nil {
-			return nil, errors.Wrap(err, "could not wrap payload")
+			return nil, nil, errors.Wrap(err, "could not wrap payload")
 		}
-		return w, s.ErrSubmitBlindedBlock
+		return w, nil, s.ErrSubmitBlindedBlock
 	}
-	w, err := blocks.WrappedExecutionPayloadCapella(s.PayloadCapella, 0)
+	if s.PayloadCapella != nil {
+		w, err := blocks.WrappedExecutionPayloadCapella(s.PayloadCapella, 0)
+		if err != nil {
+			return nil, nil, errors.Wrap(err, "could not wrap capella payload")
+		}
+		return w, nil, s.ErrSubmitBlindedBlock
+	}
+
+	w, err := blocks.WrappedExecutionPayloadDeneb(s.PayloadDeneb, 0)
 	if err != nil {
-		return nil, errors.Wrap(err, "could not wrap capella payload")
+		return nil, nil, errors.Wrap(err, "could not wrap deneb payload")
 	}
-	return w, s.ErrSubmitBlindedBlock
+	return w, s.BlobBundle, s.ErrSubmitBlindedBlock
 }

 // GetHeader for mocking.
 func (s *MockBuilderService) GetHeader(_ context.Context, slot primitives.Slot, _ [32]byte, _ [48]byte) (builder.SignedBid, error) {
+	if slots.ToEpoch(slot) >= params.BeaconConfig().DenebForkEpoch || s.BidDeneb != nil {
+		return builder.WrappedSignedBuilderBidDeneb(s.BidDeneb)
+	}
 	if slots.ToEpoch(slot) >= params.BeaconConfig().CapellaForkEpoch || s.BidCapella != nil {
 		return builder.WrappedSignedBuilderBidCapella(s.BidCapella)
 	}
--- a/beacon-chain/execution/BUILD.bazel
+++ b/beacon-chain/execution/BUILD.bazel
@@ -48,7 +48,6 @@ go_library(
        "//crypto/hash:go_default_library",
        "//encoding/bytesutil:go_default_library",
        "//io/logs:go_default_library",
-        "//math:go_default_library",
        "//monitoring/clientstats:go_default_library",
        "//monitoring/tracing:go_default_library",
        "//network:go_default_library",
--- a/beacon-chain/execution/engine_client.go
+++ b/beacon-chain/execution/engine_client.go
@@ -23,7 +23,6 @@ import (
 	payloadattribute "github.com/prysmaticlabs/prysm/v4/consensus-types/payload-attribute"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v4/math"
 	pb "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	"github.com/prysmaticlabs/prysm/v4/runtime/version"
 	"github.com/prysmaticlabs/prysm/v4/time/slots"
@@ -256,8 +255,7 @@ func (s *Service) GetPayload(ctx context.Context, payloadId [8]byte, slot primit
 		if err != nil {
 			return nil, nil, handleRPCError(err)
 		}
-		v := big.NewInt(0).SetBytes(bytesutil.ReverseByteOrder(result.Value))
-		ed, err := blocks.WrappedExecutionPayloadDeneb(result.Payload, math.WeiToGwei(v))
+		ed, err := blocks.WrappedExecutionPayloadDeneb(result.Payload, blocks.PayloadValueToGwei(result.Value))
 		if err != nil {
 			return nil, nil, err
 		}
@@ -270,8 +268,7 @@ func (s *Service) GetPayload(ctx context.Context, payloadId [8]byte, slot primit
 		if err != nil {
 			return nil, nil, handleRPCError(err)
 		}
-		v := big.NewInt(0).SetBytes(bytesutil.ReverseByteOrder(result.Value))
-		ed, err := blocks.WrappedExecutionPayloadCapella(result.Payload, math.WeiToGwei(v))
+		ed, err := blocks.WrappedExecutionPayloadCapella(result.Payload, blocks.PayloadValueToGwei(result.Value))
 		if err != nil {
 			return nil, nil, err
 		}
--- a/beacon-chain/execution/testing/BUILD.bazel
+++ b/beacon-chain/execution/testing/BUILD.bazel
@@ -23,6 +23,7 @@ go_library(
        "//consensus-types/payload-attribute:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//encoding/bytesutil:go_default_library",
+        "//math:go_default_library",
        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//time/slots:go_default_library",
--- a/beacon-chain/execution/testing/mock_engine_client.go
+++ b/beacon-chain/execution/testing/mock_engine_client.go
@@ -14,6 +14,7 @@ import (
 	payloadattribute "github.com/prysmaticlabs/prysm/v4/consensus-types/payload-attribute"
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v4/math"
 	pb "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )
@@ -61,14 +62,14 @@ func (e *EngineClient) ForkchoiceUpdated(
 // GetPayload --
 func (e *EngineClient) GetPayload(_ context.Context, _ [8]byte, s primitives.Slot) (interfaces.ExecutionData, *pb.BlobsBundle, error) {
 	if slots.ToEpoch(s) >= params.BeaconConfig().DenebForkEpoch {
-		ed, err := blocks.WrappedExecutionPayloadDeneb(e.ExecutionPayloadDeneb, e.BlockValue)
+		ed, err := blocks.WrappedExecutionPayloadDeneb(e.ExecutionPayloadDeneb, math.Gwei(e.BlockValue))
 		if err != nil {
 			return nil, nil, err
 		}
 		return ed, e.BlobsBundle, nil
 	}
 	if slots.ToEpoch(s) >= params.BeaconConfig().CapellaForkEpoch {
-		ed, err := blocks.WrappedExecutionPayloadCapella(e.ExecutionPayloadCapella, e.BlockValue)
+		ed, err := blocks.WrappedExecutionPayloadCapella(e.ExecutionPayloadCapella, math.Gwei(e.BlockValue))
 		if err != nil {
 			return nil, nil, err
 		}
--- a/beacon-chain/rpc/prysm/v1alpha1/validator/unblinder.go
+++ b/beacon-chain/rpc/prysm/v1alpha1/validator/unblinder.go
@@ -59,8 +59,9 @@ func (u *unblinder) unblindBuilderBlock(ctx context.Context) (interfaces.SignedB
 	if err = sb.SetExecution(h); err != nil {
 		return nil, errors.Wrap(err, "could not set execution")
 	}
-
-	payload, err := u.builder.SubmitBlindedBlock(ctx, sb)
+	// TODO: replace nil with proper variable for signed blinded blob sidecars
+	// replace _ with blob bundle and use it in the response.
+	payload, _, err := u.builder.SubmitBlindedBlock(ctx, sb, nil)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not submit blinded block")
 	}
--- a/consensus-types/blocks/BUILD.bazel
+++ b/consensus-types/blocks/BUILD.bazel
@@ -20,6 +20,7 @@ go_library(
        "//consensus-types/primitives:go_default_library",
        "//encoding/bytesutil:go_default_library",
        "//encoding/ssz:go_default_library",
+        "//math:go_default_library",
        "//proto/engine/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//proto/prysm/v1alpha1/validator-client:go_default_library",
--- a/consensus-types/blocks/execution.go
+++ b/consensus-types/blocks/execution.go
@@ -3,6 +3,7 @@ package blocks
 import (
 	"bytes"
 	"errors"
+	"math/big"

 	fastssz "github.com/prysmaticlabs/fastssz"
 	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
@@ -10,6 +11,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v4/encoding/ssz"
+	"github.com/prysmaticlabs/prysm/v4/math"
 	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
 	"google.golang.org/protobuf/proto"
 )
@@ -393,8 +395,8 @@ type executionPayloadCapella struct {
 }

 // WrappedExecutionPayloadCapella is a constructor which wraps a protobuf execution payload into an interface.
-func WrappedExecutionPayloadCapella(p *enginev1.ExecutionPayloadCapella, value uint64) (interfaces.ExecutionData, error) {
-	w := executionPayloadCapella{p: p, value: value}
+func WrappedExecutionPayloadCapella(p *enginev1.ExecutionPayloadCapella, value math.Gwei) (interfaces.ExecutionData, error) {
+	w := executionPayloadCapella{p: p, value: uint64(value)}
 	if w.IsNil() {
 		return nil, consensus_types.ErrNilObjectWrapped
 	}
@@ -565,8 +567,8 @@ type executionPayloadHeaderCapella struct {
 }

 // WrappedExecutionPayloadHeaderCapella is a constructor which wraps a protobuf execution header into an interface.
-func WrappedExecutionPayloadHeaderCapella(p *enginev1.ExecutionPayloadHeaderCapella, value uint64) (interfaces.ExecutionData, error) {
-	w := executionPayloadHeaderCapella{p: p, value: value}
+func WrappedExecutionPayloadHeaderCapella(p *enginev1.ExecutionPayloadHeaderCapella, value math.Gwei) (interfaces.ExecutionData, error) {
+	w := executionPayloadHeaderCapella{p: p, value: uint64(value)}
 	if w.IsNil() {
 		return nil, consensus_types.ErrNilObjectWrapped
 	}
@@ -880,8 +882,8 @@ type executionPayloadHeaderDeneb struct {
 }

 // WrappedExecutionPayloadHeaderDeneb is a constructor which wraps a protobuf execution header into an interface.
-func WrappedExecutionPayloadHeaderDeneb(p *enginev1.ExecutionPayloadHeaderDeneb, value uint64) (interfaces.ExecutionData, error) {
-	w := executionPayloadHeaderDeneb{p: p, value: value}
+func WrappedExecutionPayloadHeaderDeneb(p *enginev1.ExecutionPayloadHeaderDeneb, value math.Gwei) (interfaces.ExecutionData, error) {
+	w := executionPayloadHeaderDeneb{p: p, value: uint64(value)}
 	if w.IsNil() {
 		return nil, consensus_types.ErrNilObjectWrapped
 	}
@@ -1049,8 +1051,8 @@ type executionPayloadDeneb struct {
 }

 // WrappedExecutionPayloadDeneb is a constructor which wraps a protobuf execution payload into an interface.
-func WrappedExecutionPayloadDeneb(p *enginev1.ExecutionPayloadDeneb, value uint64) (interfaces.ExecutionData, error) {
-	w := executionPayloadDeneb{p: p, value: value}
+func WrappedExecutionPayloadDeneb(p *enginev1.ExecutionPayloadDeneb, value math.Gwei) (interfaces.ExecutionData, error) {
+	w := executionPayloadDeneb{p: p, value: uint64(value)}
 	if w.IsNil() {
 		return nil, consensus_types.ErrNilObjectWrapped
 	}
@@ -1208,3 +1210,10 @@ func (e executionPayloadDeneb) ValueInGwei() (uint64, error) {
 func (e executionPayloadDeneb) IsBlinded() bool {
 	return false
 }
+
+// PayloadValueToGwei returns a Gwei value given the payload's value
+func PayloadValueToGwei(value []byte) math.Gwei {
+	// We have to convert big endian to little endian because the value is coming from the execution layer.
+	v := big.NewInt(0).SetBytes(bytesutil.ReverseByteOrder(value))
+	return math.WeiToGwei(v)
+}
--- a/math/math_helper.go
+++ b/math/math_helper.go
@@ -213,14 +213,20 @@ func AddInt(i ...int) (int, error) {
 	return sum, nil
 }

+// Wei is the smallest unit of Ether, represented as a pointer to a bigInt.
+type Wei *big.Int
+
+// Gwei is a denomination of 1e9 Wei represented as an uint64.
+type Gwei uint64
+
 // WeiToGwei converts big int wei to uint64 gwei.
 // The input `v` is copied before being modified.
-func WeiToGwei(v *big.Int) uint64 {
+func WeiToGwei(v Wei) Gwei {
 	if v == nil {
 		return 0
 	}
 	gweiPerEth := big.NewInt(1e9)
 	copied := big.NewInt(0).Set(v)
 	copied.Div(copied, gweiPerEth)
-	return copied.Uint64()
+	return Gwei(copied.Uint64())
 }
--- a/math/math_helper_test.go
+++ b/math/math_helper_test.go
@@ -554,7 +554,7 @@ func TestAddInt(t *testing.T) {
 func TestWeiToGwei(t *testing.T) {
 	tests := []struct {
 		v    *big.Int
-		want uint64
+		want math.Gwei
 	}{
 		{big.NewInt(1e9 - 1), 0},
 		{big.NewInt(1e9), 1},
@@ -572,6 +572,6 @@ func TestWeiToGwei_CopyOk(t *testing.T) {
 	v := big.NewInt(1e9)
 	got := math.WeiToGwei(v)

-	require.Equal(t, uint64(1), got)
+	require.Equal(t, math.Gwei(1), got)
 	require.Equal(t, big.NewInt(1e9).Uint64(), v.Uint64())
 }
--- a/proto/engine/v1/BUILD.bazel
+++ b/proto/engine/v1/BUILD.bazel
@@ -41,6 +41,8 @@ ssz_gen_marshal(
        "ExecutionPayloadHeaderCapella",
        "ExecutionPayloadHeaderDeneb",
        "ExecutionPayloadDeneb",
+        "BlindedBlobsBundle",
+        "BlobsBundle",
        "Withdrawal",
    ],
 )
--- a/proto/engine/v1/execution_engine.pb.go
+++ b/proto/engine/v1/execution_engine.pb.go
@@ -1681,6 +1681,69 @@ func (x *BlobsBundle) GetBlobs() [][]byte {
 	return nil
 }

+type BlindedBlobsBundle struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	KzgCommitments [][]byte `protobuf:"bytes,1,rep,name=kzg_commitments,json=kzgCommitments,proto3" json:"kzg_commitments,omitempty" ssz-max:"4" ssz-size:"?,48"`
+	Proofs         [][]byte `protobuf:"bytes,2,rep,name=proofs,proto3" json:"proofs,omitempty" ssz-max:"4" ssz-size:"?,48"`
+	BlobRoots      [][]byte `protobuf:"bytes,3,rep,name=blob_roots,json=blobRoots,proto3" json:"blob_roots,omitempty" ssz-max:"4" ssz-size:"?,32"`
+}
+
+func (x *BlindedBlobsBundle) Reset() {
+	*x = BlindedBlobsBundle{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[16]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BlindedBlobsBundle) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BlindedBlobsBundle) ProtoMessage() {}
+
+func (x *BlindedBlobsBundle) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[16]
+	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 BlindedBlobsBundle.ProtoReflect.Descriptor instead.
+func (*BlindedBlobsBundle) Descriptor() ([]byte, []int) {
+	return file_proto_engine_v1_execution_engine_proto_rawDescGZIP(), []int{16}
+}
+
+func (x *BlindedBlobsBundle) GetKzgCommitments() [][]byte {
+	if x != nil {
+		return x.KzgCommitments
+	}
+	return nil
+}
+
+func (x *BlindedBlobsBundle) GetProofs() [][]byte {
+	if x != nil {
+		return x.Proofs
+	}
+	return nil
+}
+
+func (x *BlindedBlobsBundle) GetBlobRoots() [][]byte {
+	if x != nil {
+		return x.BlobRoots
+	}
+	return nil
+}
+
 type Blob struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1692,7 +1755,7 @@ type Blob struct {
 func (x *Blob) Reset() {
 	*x = Blob{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[16]
+		mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[17]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1705,7 +1768,7 @@ func (x *Blob) String() string {
 func (*Blob) ProtoMessage() {}

 func (x *Blob) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[16]
+	mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[17]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1718,7 +1781,7 @@ func (x *Blob) ProtoReflect() protoreflect.Message {

 // Deprecated: Use Blob.ProtoReflect.Descriptor instead.
 func (*Blob) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_execution_engine_proto_rawDescGZIP(), []int{16}
+	return file_proto_engine_v1_execution_engine_proto_rawDescGZIP(), []int{17}
 }

 func (x *Blob) GetData() []byte {
@@ -1739,7 +1802,7 @@ type ExchangeCapabilities struct {
 func (x *ExchangeCapabilities) Reset() {
 	*x = ExchangeCapabilities{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[17]
+		mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[18]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1752,7 +1815,7 @@ func (x *ExchangeCapabilities) String() string {
 func (*ExchangeCapabilities) ProtoMessage() {}

 func (x *ExchangeCapabilities) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[17]
+	mi := &file_proto_engine_v1_execution_engine_proto_msgTypes[18]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1765,7 +1828,7 @@ func (x *ExchangeCapabilities) ProtoReflect() protoreflect.Message {

 // Deprecated: Use ExchangeCapabilities.ProtoReflect.Descriptor instead.
 func (*ExchangeCapabilities) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_execution_engine_proto_rawDescGZIP(), []int{17}
+	return file_proto_engine_v1_execution_engine_proto_rawDescGZIP(), []int{18}
 }

 func (x *ExchangeCapabilities) GetSupportedMethods() []string {
@@ -2145,24 +2208,34 @@ var file_proto_engine_v1_execution_engine_proto_rawDesc = []byte{
 	0x18, 0x01, 0x34, 0x52, 0x06, 0x70, 0x72, 0x6f, 0x6f, 0x66, 0x73, 0x12, 0x27, 0x0a, 0x05, 0x62,
 	0x6c, 0x6f, 0x62, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0c, 0x42, 0x11, 0x8a, 0xb5, 0x18, 0x08,
 	0x3f, 0x2c, 0x31, 0x33, 0x31, 0x30, 0x37, 0x32, 0x92, 0xb5, 0x18, 0x01, 0x34, 0x52, 0x05, 0x62,
-	0x6c, 0x6f, 0x62, 0x73, 0x22, 0x26, 0x0a, 0x04, 0x42, 0x6c, 0x6f, 0x62, 0x12, 0x1e, 0x0a, 0x04,
-	0x64, 0x61, 0x74, 0x61, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x42, 0x0a, 0x8a, 0xb5, 0x18, 0x06,
-	0x31, 0x33, 0x31, 0x30, 0x37, 0x32, 0x52, 0x04, 0x64, 0x61, 0x74, 0x61, 0x22, 0x43, 0x0a, 0x14,
-	0x45, 0x78, 0x63, 0x68, 0x61, 0x6e, 0x67, 0x65, 0x43, 0x61, 0x70, 0x61, 0x62, 0x69, 0x6c, 0x69,
-	0x74, 0x69, 0x65, 0x73, 0x12, 0x2b, 0x0a, 0x11, 0x73, 0x75, 0x70, 0x70, 0x6f, 0x72, 0x74, 0x65,
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+	0x18, 0x01, 0x34, 0x52, 0x0e, 0x6b, 0x7a, 0x67, 0x43, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65,
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+	0x03, 0x28, 0x0c, 0x42, 0x0d, 0x8a, 0xb5, 0x18, 0x04, 0x3f, 0x2c, 0x34, 0x38, 0x92, 0xb5, 0x18,
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+	0x6f, 0x62, 0x5f, 0x72, 0x6f, 0x6f, 0x74, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0c, 0x42, 0x0d,
+	0x8a, 0xb5, 0x18, 0x04, 0x3f, 0x2c, 0x33, 0x32, 0x92, 0xb5, 0x18, 0x01, 0x34, 0x52, 0x09, 0x62,
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+	0x12, 0x1e, 0x0a, 0x04, 0x64, 0x61, 0x74, 0x61, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x42, 0x0a,
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+	0x03, 0x28, 0x09, 0x52, 0x10, 0x73, 0x75, 0x70, 0x70, 0x6f, 0x72, 0x74, 0x65, 0x64, 0x4d, 0x65,
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+	0x68, 0x65, 0x72, 0x65, 0x75, 0x6d, 0x2e, 0x65, 0x6e, 0x67, 0x69, 0x6e, 0x65, 0x2e, 0x76, 0x31,
+	0x42, 0x14, 0x45, 0x78, 0x65, 0x63, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x45, 0x6e, 0x67, 0x69, 0x6e,
+	0x65, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x3a, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
+	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x70, 0x72, 0x79, 0x73, 0x6d, 0x61, 0x74, 0x69, 0x63, 0x6c, 0x61,
+	0x62, 0x73, 0x2f, 0x70, 0x72, 0x79, 0x73, 0x6d, 0x2f, 0x76, 0x34, 0x2f, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x2f, 0x65, 0x6e, 0x67, 0x69, 0x6e, 0x65, 0x2f, 0x76, 0x31, 0x3b, 0x65, 0x6e, 0x67, 0x69,
+	0x6e, 0x65, 0x76, 0x31, 0xaa, 0x02, 0x12, 0x45, 0x74, 0x68, 0x65, 0x72, 0x65, 0x75, 0x6d, 0x2e,
+	0x45, 0x6e, 0x67, 0x69, 0x6e, 0x65, 0x2e, 0x56, 0x31, 0xca, 0x02, 0x12, 0x45, 0x74, 0x68, 0x65,
+	0x72, 0x65, 0x75, 0x6d, 0x5c, 0x45, 0x6e, 0x67, 0x69, 0x6e, 0x65, 0x5c, 0x76, 0x31, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }

 var (
@@ -2178,7 +2251,7 @@ func file_proto_engine_v1_execution_engine_proto_rawDescGZIP() []byte {
 }

 var file_proto_engine_v1_execution_engine_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_proto_engine_v1_execution_engine_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
+var file_proto_engine_v1_execution_engine_proto_msgTypes = make([]protoimpl.MessageInfo, 19)
 var file_proto_engine_v1_execution_engine_proto_goTypes = []interface{}{
 	(PayloadStatus_Status)(0),                            // 0: ethereum.engine.v1.PayloadStatus.Status
 	(*ExecutionPayload)(nil),                             // 1: ethereum.engine.v1.ExecutionPayload
@@ -2197,8 +2270,9 @@ var file_proto_engine_v1_execution_engine_proto_goTypes = []interface{}{
 	(*ForkchoiceState)(nil),                              // 14: ethereum.engine.v1.ForkchoiceState
 	(*Withdrawal)(nil),                                   // 15: ethereum.engine.v1.Withdrawal
 	(*BlobsBundle)(nil),                                  // 16: ethereum.engine.v1.BlobsBundle
-	(*Blob)(nil),                                         // 17: ethereum.engine.v1.Blob
-	(*ExchangeCapabilities)(nil),                         // 18: ethereum.engine.v1.ExchangeCapabilities
+	(*BlindedBlobsBundle)(nil),                           // 17: ethereum.engine.v1.BlindedBlobsBundle
+	(*Blob)(nil),                                         // 18: ethereum.engine.v1.Blob
+	(*ExchangeCapabilities)(nil),                         // 19: ethereum.engine.v1.ExchangeCapabilities
 }
 var file_proto_engine_v1_execution_engine_proto_depIdxs = []int32{
 	15, // 0: ethereum.engine.v1.ExecutionPayloadBodyV1.withdrawals:type_name -> ethereum.engine.v1.Withdrawal
@@ -2415,7 +2489,7 @@ func file_proto_engine_v1_execution_engine_proto_init() {
 			}
 		}
 		file_proto_engine_v1_execution_engine_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Blob); i {
+			switch v := v.(*BlindedBlobsBundle); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2427,6 +2501,18 @@ func file_proto_engine_v1_execution_engine_proto_init() {
 			}
 		}
 		file_proto_engine_v1_execution_engine_proto_msgTypes[17].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Blob); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_engine_v1_execution_engine_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ExchangeCapabilities); i {
 			case 0:
 				return &v.state
@@ -2445,7 +2531,7 @@ func file_proto_engine_v1_execution_engine_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_engine_v1_execution_engine_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   18,
+			NumMessages:   19,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
--- a/proto/engine/v1/execution_engine.proto
+++ b/proto/engine/v1/execution_engine.proto
@@ -207,7 +207,7 @@ message Withdrawal {
 	uint64 amount = 4;
 }

-// Blobs bundle is retrieved through engine-api from the execution layer client.
+// BlobsBundle is retrieved through engine-api from the execution layer client.
 // It consists of the necessary components for constructing a blobs sidecar object to gossip through p2p.
 message BlobsBundle {
 	// The KZG commitments of the blobs.
@@ -218,6 +218,16 @@ message BlobsBundle {
 	repeated bytes blobs = 3 [(ethereum.eth.ext.ssz_size) = "?,131072", (ethereum.eth.ext.ssz_max) = "4"];
 }

+// BlindedBlobsBundle is retrieved through the builder-api from /eth/v1/builder/header/{slot}/{parent_hash}/{pubkey} after the Deneb hardfork.
+message BlindedBlobsBundle {
+	// The KZG commitments of the blobs.
+	repeated bytes kzg_commitments = 1 [(ethereum.eth.ext.ssz_size) = "?,48", (ethereum.eth.ext.ssz_max) = "4"];
+	// The proofs of the blobs.
+	repeated bytes proofs = 2 [(ethereum.eth.ext.ssz_size) = "?,48", (ethereum.eth.ext.ssz_max) = "4"];
+	// The blob roots.
+	repeated bytes blob_roots = 3 [(ethereum.eth.ext.ssz_size) = "?,32", (ethereum.eth.ext.ssz_max) = "4"];
+}
+
 // Blob contains the data that is to be committed on chain.
 message Blob {
 	// Each blob consists of `BLS_FIELD_ELEMENT`(32) multiplies `FIELD_ELEMENTS_PER_BLOB`(4096)
--- a/proto/engine/v1/generated.ssz.go
+++ b/proto/engine/v1/generated.ssz.go
@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: b6dd872046b3b8deb04e7771b1c2436ff08459f58cddcdeb46920124a0d639e0
+// Hash: e55708aac3d3cb6d7fa68dafd784f6fa014917a3888e8e46fc9e056dbf0f2672
 package enginev1

 import (
@@ -2415,3 +2415,495 @@ func (w *Withdrawal) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	}
 	return
 }
+
+// MarshalSSZ ssz marshals the BlobsBundle object
+func (b *BlobsBundle) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(b)
+}
+
+// MarshalSSZTo ssz marshals the BlobsBundle object to a target array
+func (b *BlobsBundle) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(12)
+
+	// Offset (0) 'KzgCommitments'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(b.KzgCommitments) * 48
+
+	// Offset (1) 'Proofs'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(b.Proofs) * 48
+
+	// Offset (2) 'Blobs'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(b.Blobs) * 131072
+
+	// Field (0) 'KzgCommitments'
+	if size := len(b.KzgCommitments); size > 4 {
+		err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4)
+		return
+	}
+	for ii := 0; ii < len(b.KzgCommitments); ii++ {
+		if size := len(b.KzgCommitments[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.KzgCommitments[ii]", size, 48)
+			return
+		}
+		dst = append(dst, b.KzgCommitments[ii]...)
+	}
+
+	// Field (1) 'Proofs'
+	if size := len(b.Proofs); size > 4 {
+		err = ssz.ErrListTooBigFn("--.Proofs", size, 4)
+		return
+	}
+	for ii := 0; ii < len(b.Proofs); ii++ {
+		if size := len(b.Proofs[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.Proofs[ii]", size, 48)
+			return
+		}
+		dst = append(dst, b.Proofs[ii]...)
+	}
+
+	// Field (2) 'Blobs'
+	if size := len(b.Blobs); size > 4 {
+		err = ssz.ErrListTooBigFn("--.Blobs", size, 4)
+		return
+	}
+	for ii := 0; ii < len(b.Blobs); ii++ {
+		if size := len(b.Blobs[ii]); size != 131072 {
+			err = ssz.ErrBytesLengthFn("--.Blobs[ii]", size, 131072)
+			return
+		}
+		dst = append(dst, b.Blobs[ii]...)
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the BlobsBundle object
+func (b *BlobsBundle) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 12 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o1, o2 uint64
+
+	// Offset (0) 'KzgCommitments'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 < 12 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (1) 'Proofs'
+	if o1 = ssz.ReadOffset(buf[4:8]); o1 > size || o0 > o1 {
+		return ssz.ErrOffset
+	}
+
+	// Offset (2) 'Blobs'
+	if o2 = ssz.ReadOffset(buf[8:12]); o2 > size || o1 > o2 {
+		return ssz.ErrOffset
+	}
+
+	// Field (0) 'KzgCommitments'
+	{
+		buf = tail[o0:o1]
+		num, err := ssz.DivideInt2(len(buf), 48, 4)
+		if err != nil {
+			return err
+		}
+		b.KzgCommitments = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(b.KzgCommitments[ii]) == 0 {
+				b.KzgCommitments[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			b.KzgCommitments[ii] = append(b.KzgCommitments[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+
+	// Field (1) 'Proofs'
+	{
+		buf = tail[o1:o2]
+		num, err := ssz.DivideInt2(len(buf), 48, 4)
+		if err != nil {
+			return err
+		}
+		b.Proofs = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(b.Proofs[ii]) == 0 {
+				b.Proofs[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			b.Proofs[ii] = append(b.Proofs[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+
+	// Field (2) 'Blobs'
+	{
+		buf = tail[o2:]
+		num, err := ssz.DivideInt2(len(buf), 131072, 4)
+		if err != nil {
+			return err
+		}
+		b.Blobs = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(b.Blobs[ii]) == 0 {
+				b.Blobs[ii] = make([]byte, 0, len(buf[ii*131072:(ii+1)*131072]))
+			}
+			b.Blobs[ii] = append(b.Blobs[ii], buf[ii*131072:(ii+1)*131072]...)
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the BlobsBundle object
+func (b *BlobsBundle) SizeSSZ() (size int) {
+	size = 12
+
+	// Field (0) 'KzgCommitments'
+	size += len(b.KzgCommitments) * 48
+
+	// Field (1) 'Proofs'
+	size += len(b.Proofs) * 48
+
+	// Field (2) 'Blobs'
+	size += len(b.Blobs) * 131072
+
+	return
+}
+
+// HashTreeRoot ssz hashes the BlobsBundle object
+func (b *BlobsBundle) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(b)
+}
+
+// HashTreeRootWith ssz hashes the BlobsBundle object with a hasher
+func (b *BlobsBundle) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'KzgCommitments'
+	{
+		if size := len(b.KzgCommitments); size > 4 {
+			err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range b.KzgCommitments {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(b.KzgCommitments))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4)
+		}
+	}
+
+	// Field (1) 'Proofs'
+	{
+		if size := len(b.Proofs); size > 4 {
+			err = ssz.ErrListTooBigFn("--.Proofs", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range b.Proofs {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(b.Proofs))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4)
+		}
+	}
+
+	// Field (2) 'Blobs'
+	{
+		if size := len(b.Blobs); size > 4 {
+			err = ssz.ErrListTooBigFn("--.Blobs", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range b.Blobs {
+			if len(i) != 131072 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(b.Blobs))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4)
+		}
+	}
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
+
+// MarshalSSZ ssz marshals the BlindedBlobsBundle object
+func (b *BlindedBlobsBundle) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(b)
+}
+
+// MarshalSSZTo ssz marshals the BlindedBlobsBundle object to a target array
+func (b *BlindedBlobsBundle) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(12)
+
+	// Offset (0) 'KzgCommitments'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(b.KzgCommitments) * 48
+
+	// Offset (1) 'Proofs'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(b.Proofs) * 48
+
+	// Offset (2) 'BlobRoots'
+	dst = ssz.WriteOffset(dst, offset)
+	offset += len(b.BlobRoots) * 32
+
+	// Field (0) 'KzgCommitments'
+	if size := len(b.KzgCommitments); size > 4 {
+		err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4)
+		return
+	}
+	for ii := 0; ii < len(b.KzgCommitments); ii++ {
+		if size := len(b.KzgCommitments[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.KzgCommitments[ii]", size, 48)
+			return
+		}
+		dst = append(dst, b.KzgCommitments[ii]...)
+	}
+
+	// Field (1) 'Proofs'
+	if size := len(b.Proofs); size > 4 {
+		err = ssz.ErrListTooBigFn("--.Proofs", size, 4)
+		return
+	}
+	for ii := 0; ii < len(b.Proofs); ii++ {
+		if size := len(b.Proofs[ii]); size != 48 {
+			err = ssz.ErrBytesLengthFn("--.Proofs[ii]", size, 48)
+			return
+		}
+		dst = append(dst, b.Proofs[ii]...)
+	}
+
+	// Field (2) 'BlobRoots'
+	if size := len(b.BlobRoots); size > 4 {
+		err = ssz.ErrListTooBigFn("--.BlobRoots", size, 4)
+		return
+	}
+	for ii := 0; ii < len(b.BlobRoots); ii++ {
+		if size := len(b.BlobRoots[ii]); size != 32 {
+			err = ssz.ErrBytesLengthFn("--.BlobRoots[ii]", size, 32)
+			return
+		}
+		dst = append(dst, b.BlobRoots[ii]...)
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the BlindedBlobsBundle object
+func (b *BlindedBlobsBundle) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 12 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o1, o2 uint64
+
+	// Offset (0) 'KzgCommitments'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 < 12 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Offset (1) 'Proofs'
+	if o1 = ssz.ReadOffset(buf[4:8]); o1 > size || o0 > o1 {
+		return ssz.ErrOffset
+	}
+
+	// Offset (2) 'BlobRoots'
+	if o2 = ssz.ReadOffset(buf[8:12]); o2 > size || o1 > o2 {
+		return ssz.ErrOffset
+	}
+
+	// Field (0) 'KzgCommitments'
+	{
+		buf = tail[o0:o1]
+		num, err := ssz.DivideInt2(len(buf), 48, 4)
+		if err != nil {
+			return err
+		}
+		b.KzgCommitments = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(b.KzgCommitments[ii]) == 0 {
+				b.KzgCommitments[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			b.KzgCommitments[ii] = append(b.KzgCommitments[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+
+	// Field (1) 'Proofs'
+	{
+		buf = tail[o1:o2]
+		num, err := ssz.DivideInt2(len(buf), 48, 4)
+		if err != nil {
+			return err
+		}
+		b.Proofs = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(b.Proofs[ii]) == 0 {
+				b.Proofs[ii] = make([]byte, 0, len(buf[ii*48:(ii+1)*48]))
+			}
+			b.Proofs[ii] = append(b.Proofs[ii], buf[ii*48:(ii+1)*48]...)
+		}
+	}
+
+	// Field (2) 'BlobRoots'
+	{
+		buf = tail[o2:]
+		num, err := ssz.DivideInt2(len(buf), 32, 4)
+		if err != nil {
+			return err
+		}
+		b.BlobRoots = make([][]byte, num)
+		for ii := 0; ii < num; ii++ {
+			if cap(b.BlobRoots[ii]) == 0 {
+				b.BlobRoots[ii] = make([]byte, 0, len(buf[ii*32:(ii+1)*32]))
+			}
+			b.BlobRoots[ii] = append(b.BlobRoots[ii], buf[ii*32:(ii+1)*32]...)
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the BlindedBlobsBundle object
+func (b *BlindedBlobsBundle) SizeSSZ() (size int) {
+	size = 12
+
+	// Field (0) 'KzgCommitments'
+	size += len(b.KzgCommitments) * 48
+
+	// Field (1) 'Proofs'
+	size += len(b.Proofs) * 48
+
+	// Field (2) 'BlobRoots'
+	size += len(b.BlobRoots) * 32
+
+	return
+}
+
+// HashTreeRoot ssz hashes the BlindedBlobsBundle object
+func (b *BlindedBlobsBundle) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(b)
+}
+
+// HashTreeRootWith ssz hashes the BlindedBlobsBundle object with a hasher
+func (b *BlindedBlobsBundle) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'KzgCommitments'
+	{
+		if size := len(b.KzgCommitments); size > 4 {
+			err = ssz.ErrListTooBigFn("--.KzgCommitments", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range b.KzgCommitments {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(b.KzgCommitments))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4)
+		}
+	}
+
+	// Field (1) 'Proofs'
+	{
+		if size := len(b.Proofs); size > 4 {
+			err = ssz.ErrListTooBigFn("--.Proofs", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range b.Proofs {
+			if len(i) != 48 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.PutBytes(i)
+		}
+
+		numItems := uint64(len(b.Proofs))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4)
+		}
+	}
+
+	// Field (2) 'BlobRoots'
+	{
+		if size := len(b.BlobRoots); size > 4 {
+			err = ssz.ErrListTooBigFn("--.BlobRoots", size, 4)
+			return
+		}
+		subIndx := hh.Index()
+		for _, i := range b.BlobRoots {
+			if len(i) != 32 {
+				err = ssz.ErrBytesLength
+				return
+			}
+			hh.Append(i)
+		}
+
+		numItems := uint64(len(b.BlobRoots))
+		if ssz.EnableVectorizedHTR {
+			hh.MerkleizeWithMixinVectorizedHTR(subIndx, numItems, 4)
+		} else {
+			hh.MerkleizeWithMixin(subIndx, numItems, 4)
+		}
+	}
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
--- a/proto/engine/v1/json_marshal_unmarshal.go
+++ b/proto/engine/v1/json_marshal_unmarshal.go
@@ -701,6 +701,14 @@ type BlobBundleJSON struct {
 	Blobs       [][]byte   `json:"blobs"`
 }

+func (b BlobBundleJSON) ToProto() *BlobsBundle {
+	return &BlobsBundle{
+		KzgCommitments: bytesutil.SafeCopy2dBytes(bytesutil.FromBytes48Array(b.Commitments)),
+		Proofs:         bytesutil.SafeCopy2dBytes(bytesutil.FromBytes48Array(b.Proofs)),
+		Blobs:          bytesutil.SafeCopy2dBytes(b.Blobs),
+	}
+}
+
 // MarshalJSON --
 func (e *ExecutionPayloadDeneb) MarshalJSON() ([]byte, error) {
 	transactions := make([]hexutil.Bytes, len(e.Transactions))
@@ -739,11 +747,11 @@ func (e *ExecutionPayloadDeneb) MarshalJSON() ([]byte, error) {
 		Timestamp:     &timeStamp,
 		ExtraData:     e.ExtraData,
 		BaseFeePerGas: baseFeeHex,
-		ExcessDataGas: &excessDataGas,
-		DataGasUsed:   &dataGasUsed,
 		BlockHash:     &bHash,
 		Transactions:  transactions,
 		Withdrawals:   e.Withdrawals,
+		DataGasUsed:   &dataGasUsed,
+		ExcessDataGas: &excessDataGas,
 	})
 }

--- a/proto/engine/v1/json_marshal_unmarshal_test.go
+++ b/proto/engine/v1/json_marshal_unmarshal_test.go
@@ -243,14 +243,14 @@ func TestJsonMarshalUnmarshal(t *testing.T) {
 				BaseFeePerGas: "0x123",
 				BlockHash:     &hash,
 				Transactions:  []hexutil.Bytes{{}},
-				DataGasUsed:   &dgu,
-				ExcessDataGas: &edg,
 				Withdrawals: []*enginev1.Withdrawal{{
 					Index:          1,
 					ValidatorIndex: 1,
 					Address:        bytesutil.PadTo([]byte("address"), 20),
 					Amount:         1,
 				}},
+				DataGasUsed:   &dgu,
+				ExcessDataGas: &edg,
 			},
 		}
 		enc, err := json.Marshal(resp)
@@ -267,11 +267,11 @@ func TestJsonMarshalUnmarshal(t *testing.T) {
 		require.DeepEqual(t, uint64(2), pb.Payload.GasLimit)
 		require.DeepEqual(t, uint64(3), pb.Payload.GasUsed)
 		require.DeepEqual(t, uint64(4), pb.Payload.Timestamp)
+		require.DeepEqual(t, uint64(5), pb.Payload.DataGasUsed)
+		require.DeepEqual(t, uint64(6), pb.Payload.ExcessDataGas)
 		require.DeepEqual(t, extra.Bytes(), pb.Payload.ExtraData)
 		feePerGas := new(big.Int).SetBytes(pb.Payload.BaseFeePerGas)
 		require.Equal(t, "15832716547479101977395928904157292820330083199902421483727713169783165812736", feePerGas.String())
-		require.DeepEqual(t, uint64(5), pb.Payload.DataGasUsed)
-		require.DeepEqual(t, uint64(6), pb.Payload.ExcessDataGas)
 		require.DeepEqual(t, hash.Bytes(), pb.Payload.BlockHash)
 		require.DeepEqual(t, [][]byte{{}}, pb.Payload.Transactions)
 		require.Equal(t, 1, len(pb.Payload.Withdrawals))
--- a/proto/eth/v1/generated.ssz.go
+++ b/proto/eth/v1/generated.ssz.go
@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 1b85415b8554b026eb2df13a10fe94efa922bae61c9c666935ebe1c75e8d419f
+// Hash: 401cdb3ad7380c513dbcec6cecea7854113a0c2d862d35445b2b319aaf3cbecd
 package v1

 import (
--- a/proto/eth/v2/generated.ssz.go
+++ b/proto/eth/v2/generated.ssz.go
@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 32f6d66a95401ce0292033b47fd1417101fc5e73b4d4e89610bb8060e0e43bae
+// Hash: 53d31a180e6d53a5d13f2c323d24dd544c0a684a457631fe0dcae4428696a70b
 package eth

 import (
--- a/proto/prysm/v1alpha1/BUILD.bazel
+++ b/proto/prysm/v1alpha1/BUILD.bazel
@@ -129,6 +129,7 @@ ssz_gen_marshal(
        "SignedBLSToExecutionChange",
        "BuilderBid",
        "BuilderBidCapella",
+        "BuilderBidDeneb",
        "BlobSidecar",
        "SignedBlobSidecar",
        "BlobIdentifier",
--- a/proto/prysm/v1alpha1/beacon_block.pb.go
+++ b/proto/prysm/v1alpha1/beacon_block.pb.go
@@ -3622,6 +3622,132 @@ func (x *SignedBuilderBidCapella) GetSignature() []byte {
 	return nil
 }

+type BuilderBidDeneb struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Header             *v1.ExecutionPayloadHeaderDeneb `protobuf:"bytes,1,opt,name=header,proto3" json:"header,omitempty"`
+	Value              []byte                          `protobuf:"bytes,2,opt,name=value,proto3" json:"value,omitempty" ssz-size:"32"`
+	Pubkey             []byte                          `protobuf:"bytes,3,opt,name=pubkey,proto3" json:"pubkey,omitempty" ssz-size:"48"`
+	BlindedBlobsBundle *v1.BlindedBlobsBundle          `protobuf:"bytes,4,opt,name=blinded_blobs_bundle,json=blindedBlobsBundle,proto3" json:"blinded_blobs_bundle,omitempty"`
+}
+
+func (x *BuilderBidDeneb) Reset() {
+	*x = BuilderBidDeneb{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[47]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BuilderBidDeneb) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BuilderBidDeneb) ProtoMessage() {}
+
+func (x *BuilderBidDeneb) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[47]
+	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 BuilderBidDeneb.ProtoReflect.Descriptor instead.
+func (*BuilderBidDeneb) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_beacon_block_proto_rawDescGZIP(), []int{47}
+}
+
+func (x *BuilderBidDeneb) GetHeader() *v1.ExecutionPayloadHeaderDeneb {
+	if x != nil {
+		return x.Header
+	}
+	return nil
+}
+
+func (x *BuilderBidDeneb) GetValue() []byte {
+	if x != nil {
+		return x.Value
+	}
+	return nil
+}
+
+func (x *BuilderBidDeneb) GetPubkey() []byte {
+	if x != nil {
+		return x.Pubkey
+	}
+	return nil
+}
+
+func (x *BuilderBidDeneb) GetBlindedBlobsBundle() *v1.BlindedBlobsBundle {
+	if x != nil {
+		return x.BlindedBlobsBundle
+	}
+	return nil
+}
+
+type SignedBuilderBidDeneb struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Message   *BuilderBidDeneb `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	Signature []byte           `protobuf:"bytes,2,opt,name=signature,proto3" json:"signature,omitempty" ssz-size:"96"`
+}
+
+func (x *SignedBuilderBidDeneb) Reset() {
+	*x = SignedBuilderBidDeneb{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[48]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SignedBuilderBidDeneb) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SignedBuilderBidDeneb) ProtoMessage() {}
+
+func (x *SignedBuilderBidDeneb) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[48]
+	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 SignedBuilderBidDeneb.ProtoReflect.Descriptor instead.
+func (*SignedBuilderBidDeneb) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_beacon_block_proto_rawDescGZIP(), []int{48}
+}
+
+func (x *SignedBuilderBidDeneb) GetMessage() *BuilderBidDeneb {
+	if x != nil {
+		return x.Message
+	}
+	return nil
+}
+
+func (x *SignedBuilderBidDeneb) GetSignature() []byte {
+	if x != nil {
+		return x.Signature
+	}
+	return nil
+}
+
 type Deposit_Data struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3636,7 +3762,7 @@ type Deposit_Data struct {
 func (x *Deposit_Data) Reset() {
 	*x = Deposit_Data{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[47]
+		mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[49]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -3649,7 +3775,7 @@ func (x *Deposit_Data) String() string {
 func (*Deposit_Data) ProtoMessage() {}

 func (x *Deposit_Data) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[47]
+	mi := &file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[49]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -4696,18 +4822,41 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{
 	0x65, 0x72, 0x42, 0x69, 0x64, 0x43, 0x61, 0x70, 0x65, 0x6c, 0x6c, 0x61, 0x52, 0x07, 0x6d, 0x65,
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+	0x75, 0x6d, 0x5c, 0x45, 0x74, 0x68, 0x5c, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }

 var (
@@ -4722,7 +4871,7 @@ func file_proto_prysm_v1alpha1_beacon_block_proto_rawDescGZIP() []byte {
 	return file_proto_prysm_v1alpha1_beacon_block_proto_rawDescData
 }

-var file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes = make([]protoimpl.MessageInfo, 48)
+var file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes = make([]protoimpl.MessageInfo, 50)
 var file_proto_prysm_v1alpha1_beacon_block_proto_goTypes = []interface{}{
 	(*GenericSignedBeaconBlock)(nil),              // 0: ethereum.eth.v1alpha1.GenericSignedBeaconBlock
 	(*GenericBeaconBlock)(nil),                    // 1: ethereum.eth.v1alpha1.GenericBeaconBlock
@@ -4771,20 +4920,23 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_goTypes = []interface{}{
 	(*SignedBuilderBid)(nil),                      // 44: ethereum.eth.v1alpha1.SignedBuilderBid
 	(*BuilderBidCapella)(nil),                     // 45: ethereum.eth.v1alpha1.BuilderBidCapella
 	(*SignedBuilderBidCapella)(nil),               // 46: ethereum.eth.v1alpha1.SignedBuilderBidCapella
-	(*Deposit_Data)(nil),                          // 47: ethereum.eth.v1alpha1.Deposit.Data
-	(*Attestation)(nil),                           // 48: ethereum.eth.v1alpha1.Attestation
-	(*AttestationData)(nil),                       // 49: ethereum.eth.v1alpha1.AttestationData
-	(*v1.ExecutionPayload)(nil),                   // 50: ethereum.engine.v1.ExecutionPayload
-	(*v1.ExecutionPayloadHeader)(nil),             // 51: ethereum.engine.v1.ExecutionPayloadHeader
-	(*SignedBlobSidecar)(nil),                     // 52: ethereum.eth.v1alpha1.SignedBlobSidecar
-	(*BlobSidecar)(nil),                           // 53: ethereum.eth.v1alpha1.BlobSidecar
-	(*v1.ExecutionPayloadDeneb)(nil),              // 54: ethereum.engine.v1.ExecutionPayloadDeneb
-	(*SignedBLSToExecutionChange)(nil),            // 55: ethereum.eth.v1alpha1.SignedBLSToExecutionChange
-	(*v1.ExecutionPayloadCapella)(nil),            // 56: ethereum.engine.v1.ExecutionPayloadCapella
-	(*v1.ExecutionPayloadHeaderCapella)(nil),      // 57: ethereum.engine.v1.ExecutionPayloadHeaderCapella
-	(*SignedBlindedBlobSidecar)(nil),              // 58: ethereum.eth.v1alpha1.SignedBlindedBlobSidecar
-	(*BlindedBlobSidecar)(nil),                    // 59: ethereum.eth.v1alpha1.BlindedBlobSidecar
-	(*v1.ExecutionPayloadHeaderDeneb)(nil),        // 60: ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	(*BuilderBidDeneb)(nil),                       // 47: ethereum.eth.v1alpha1.BuilderBidDeneb
+	(*SignedBuilderBidDeneb)(nil),                 // 48: ethereum.eth.v1alpha1.SignedBuilderBidDeneb
+	(*Deposit_Data)(nil),                          // 49: ethereum.eth.v1alpha1.Deposit.Data
+	(*Attestation)(nil),                           // 50: ethereum.eth.v1alpha1.Attestation
+	(*AttestationData)(nil),                       // 51: ethereum.eth.v1alpha1.AttestationData
+	(*v1.ExecutionPayload)(nil),                   // 52: ethereum.engine.v1.ExecutionPayload
+	(*v1.ExecutionPayloadHeader)(nil),             // 53: ethereum.engine.v1.ExecutionPayloadHeader
+	(*SignedBlobSidecar)(nil),                     // 54: ethereum.eth.v1alpha1.SignedBlobSidecar
+	(*BlobSidecar)(nil),                           // 55: ethereum.eth.v1alpha1.BlobSidecar
+	(*v1.ExecutionPayloadDeneb)(nil),              // 56: ethereum.engine.v1.ExecutionPayloadDeneb
+	(*SignedBLSToExecutionChange)(nil),            // 57: ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	(*v1.ExecutionPayloadCapella)(nil),            // 58: ethereum.engine.v1.ExecutionPayloadCapella
+	(*v1.ExecutionPayloadHeaderCapella)(nil),      // 59: ethereum.engine.v1.ExecutionPayloadHeaderCapella
+	(*SignedBlindedBlobSidecar)(nil),              // 60: ethereum.eth.v1alpha1.SignedBlindedBlobSidecar
+	(*BlindedBlobSidecar)(nil),                    // 61: ethereum.eth.v1alpha1.BlindedBlobSidecar
+	(*v1.ExecutionPayloadHeaderDeneb)(nil),        // 62: ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	(*v1.BlindedBlobsBundle)(nil),                 // 63: ethereum.engine.v1.BlindedBlobsBundle
 }
 var file_proto_prysm_v1alpha1_beacon_block_proto_depIdxs = []int32{
 	3,   // 0: ethereum.eth.v1alpha1.GenericSignedBeaconBlock.phase0:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlock
@@ -4810,13 +4962,13 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_depIdxs = []int32{
 	13,  // 20: ethereum.eth.v1alpha1.BeaconBlockBody.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 21: ethereum.eth.v1alpha1.BeaconBlockBody.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 22: ethereum.eth.v1alpha1.BeaconBlockBody.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 23: ethereum.eth.v1alpha1.BeaconBlockBody.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 23: ethereum.eth.v1alpha1.BeaconBlockBody.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 24: ethereum.eth.v1alpha1.BeaconBlockBody.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 25: ethereum.eth.v1alpha1.BeaconBlockBody.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	13,  // 26: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 27: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 28: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 29: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 29: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 30: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 31: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 32: ethereum.eth.v1alpha1.BeaconBlockBodyAltair.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
@@ -4824,93 +4976,96 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_depIdxs = []int32{
 	15,  // 34: ethereum.eth.v1alpha1.ProposerSlashing.header_2:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlockHeader
 	16,  // 35: ethereum.eth.v1alpha1.AttesterSlashing.attestation_1:type_name -> ethereum.eth.v1alpha1.IndexedAttestation
 	16,  // 36: ethereum.eth.v1alpha1.AttesterSlashing.attestation_2:type_name -> ethereum.eth.v1alpha1.IndexedAttestation
-	47,  // 37: ethereum.eth.v1alpha1.Deposit.data:type_name -> ethereum.eth.v1alpha1.Deposit.Data
+	49,  // 37: ethereum.eth.v1alpha1.Deposit.data:type_name -> ethereum.eth.v1alpha1.Deposit.Data
 	11,  // 38: ethereum.eth.v1alpha1.SignedVoluntaryExit.exit:type_name -> ethereum.eth.v1alpha1.VoluntaryExit
 	14,  // 39: ethereum.eth.v1alpha1.SignedBeaconBlockHeader.header:type_name -> ethereum.eth.v1alpha1.BeaconBlockHeader
-	49,  // 40: ethereum.eth.v1alpha1.IndexedAttestation.data:type_name -> ethereum.eth.v1alpha1.AttestationData
+	51,  // 40: ethereum.eth.v1alpha1.IndexedAttestation.data:type_name -> ethereum.eth.v1alpha1.AttestationData
 	19,  // 41: ethereum.eth.v1alpha1.SignedBeaconBlockBellatrix.block:type_name -> ethereum.eth.v1alpha1.BeaconBlockBellatrix
 	20,  // 42: ethereum.eth.v1alpha1.BeaconBlockBellatrix.body:type_name -> ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix
 	13,  // 43: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 44: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 45: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 46: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 46: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 47: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 48: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 49: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	50,  // 50: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayload
+	52,  // 50: ethereum.eth.v1alpha1.BeaconBlockBodyBellatrix.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayload
 	22,  // 51: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockBellatrix.block:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockBellatrix
 	23,  // 52: ethereum.eth.v1alpha1.BlindedBeaconBlockBellatrix.body:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix
 	13,  // 53: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 54: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 55: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 56: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 56: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 57: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 58: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 59: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	51,  // 60: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
+	53,  // 60: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyBellatrix.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
 	25,  // 61: ethereum.eth.v1alpha1.SignedBeaconBlockAndBlobsDeneb.block:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlockDeneb
-	52,  // 62: ethereum.eth.v1alpha1.SignedBeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.SignedBlobSidecar
+	54,  // 62: ethereum.eth.v1alpha1.SignedBeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.SignedBlobSidecar
 	27,  // 63: ethereum.eth.v1alpha1.SignedBeaconBlockDeneb.block:type_name -> ethereum.eth.v1alpha1.BeaconBlockDeneb
 	27,  // 64: ethereum.eth.v1alpha1.BeaconBlockAndBlobsDeneb.block:type_name -> ethereum.eth.v1alpha1.BeaconBlockDeneb
-	53,  // 65: ethereum.eth.v1alpha1.BeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.BlobSidecar
+	55,  // 65: ethereum.eth.v1alpha1.BeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.BlobSidecar
 	28,  // 66: ethereum.eth.v1alpha1.BeaconBlockDeneb.body:type_name -> ethereum.eth.v1alpha1.BeaconBlockBodyDeneb
 	13,  // 67: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 68: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 69: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 70: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 70: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 71: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 72: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 73: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	54,  // 74: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayloadDeneb
-	55,  // 75: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	56,  // 74: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayloadDeneb
+	57,  // 75: ethereum.eth.v1alpha1.BeaconBlockBodyDeneb.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
 	30,  // 76: ethereum.eth.v1alpha1.SignedBeaconBlockCapella.block:type_name -> ethereum.eth.v1alpha1.BeaconBlockCapella
 	31,  // 77: ethereum.eth.v1alpha1.BeaconBlockCapella.body:type_name -> ethereum.eth.v1alpha1.BeaconBlockBodyCapella
 	13,  // 78: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 79: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 80: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 81: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 81: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 82: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 83: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 84: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	56,  // 85: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayloadCapella
-	55,  // 86: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	58,  // 85: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayloadCapella
+	57,  // 86: ethereum.eth.v1alpha1.BeaconBlockBodyCapella.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
 	33,  // 87: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockCapella.block:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockCapella
 	34,  // 88: ethereum.eth.v1alpha1.BlindedBeaconBlockCapella.body:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella
 	13,  // 89: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 90: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 91: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 92: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 92: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 93: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 94: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 95: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	57,  // 96: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
-	55,  // 97: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	59,  // 96: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
+	57,  // 97: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyCapella.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
 	37,  // 98: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockAndBlobsDeneb.block:type_name -> ethereum.eth.v1alpha1.SignedBlindedBeaconBlockDeneb
-	58,  // 99: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.SignedBlindedBlobSidecar
+	60,  // 99: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.SignedBlindedBlobSidecar
 	38,  // 100: ethereum.eth.v1alpha1.BlindedBeaconBlockAndBlobsDeneb.block:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockDeneb
-	59,  // 101: ethereum.eth.v1alpha1.BlindedBeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.BlindedBlobSidecar
+	61,  // 101: ethereum.eth.v1alpha1.BlindedBeaconBlockAndBlobsDeneb.blobs:type_name -> ethereum.eth.v1alpha1.BlindedBlobSidecar
 	38,  // 102: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockDeneb.block:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockDeneb
 	39,  // 103: ethereum.eth.v1alpha1.BlindedBeaconBlockDeneb.body:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb
 	13,  // 104: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
 	8,   // 105: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
 	9,   // 106: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
-	48,  // 107: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	50,  // 107: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
 	10,  // 108: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
 	12,  // 109: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
 	17,  // 110: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
-	60,  // 111: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderDeneb
-	55,  // 112: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	62,  // 111: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	57,  // 112: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyDeneb.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
 	42,  // 113: ethereum.eth.v1alpha1.SignedValidatorRegistrationsV1.messages:type_name -> ethereum.eth.v1alpha1.SignedValidatorRegistrationV1
 	40,  // 114: ethereum.eth.v1alpha1.SignedValidatorRegistrationV1.message:type_name -> ethereum.eth.v1alpha1.ValidatorRegistrationV1
-	51,  // 115: ethereum.eth.v1alpha1.BuilderBid.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
+	53,  // 115: ethereum.eth.v1alpha1.BuilderBid.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
 	43,  // 116: ethereum.eth.v1alpha1.SignedBuilderBid.message:type_name -> ethereum.eth.v1alpha1.BuilderBid
-	57,  // 117: ethereum.eth.v1alpha1.BuilderBidCapella.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
+	59,  // 117: ethereum.eth.v1alpha1.BuilderBidCapella.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
 	45,  // 118: ethereum.eth.v1alpha1.SignedBuilderBidCapella.message:type_name -> ethereum.eth.v1alpha1.BuilderBidCapella
-	119, // [119:119] is the sub-list for method output_type
-	119, // [119:119] is the sub-list for method input_type
-	119, // [119:119] is the sub-list for extension type_name
-	119, // [119:119] is the sub-list for extension extendee
-	0,   // [0:119] is the sub-list for field type_name
+	62,  // 119: ethereum.eth.v1alpha1.BuilderBidDeneb.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	63,  // 120: ethereum.eth.v1alpha1.BuilderBidDeneb.blinded_blobs_bundle:type_name -> ethereum.engine.v1.BlindedBlobsBundle
+	47,  // 121: ethereum.eth.v1alpha1.SignedBuilderBidDeneb.message:type_name -> ethereum.eth.v1alpha1.BuilderBidDeneb
+	122, // [122:122] is the sub-list for method output_type
+	122, // [122:122] is the sub-list for method input_type
+	122, // [122:122] is the sub-list for extension type_name
+	122, // [122:122] is the sub-list for extension extendee
+	0,   // [0:122] is the sub-list for field type_name
 }

 func init() { file_proto_prysm_v1alpha1_beacon_block_proto_init() }
@@ -5487,6 +5642,30 @@ func file_proto_prysm_v1alpha1_beacon_block_proto_init() {
 			}
 		}
 		file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[47].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BuilderBidDeneb); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[48].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignedBuilderBidDeneb); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[49].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Deposit_Data); i {
 			case 0:
 				return &v.state
@@ -5525,7 +5704,7 @@ func file_proto_prysm_v1alpha1_beacon_block_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   48,
+			NumMessages:   50,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
--- a/proto/prysm/v1alpha1/beacon_block.proto
+++ b/proto/prysm/v1alpha1/beacon_block.proto
@@ -761,3 +761,15 @@ message SignedBuilderBidCapella {
    bytes signature = 2 [(ethereum.eth.ext.ssz_size) = "96"];
 }

+message BuilderBidDeneb {
+    ethereum.engine.v1.ExecutionPayloadHeaderDeneb header = 1;
+    bytes value = 2 [(ethereum.eth.ext.ssz_size) = "32"];
+    bytes pubkey = 3 [(ethereum.eth.ext.ssz_size) = "48"];
+    ethereum.engine.v1.BlindedBlobsBundle blinded_blobs_bundle = 4; // new in deneb
+}
+
+message SignedBuilderBidDeneb {
+    BuilderBidDeneb message = 1 ;
+    bytes signature = 2 [(ethereum.eth.ext.ssz_size) = "96"];
+}
+
--- a/proto/prysm/v1alpha1/generated.ssz.go
+++ b/proto/prysm/v1alpha1/generated.ssz.go
@@ -1,5 +1,5 @@
 // Code generated by fastssz. DO NOT EDIT.
-// Hash: 2ae3aad86b787c66c08ffd704552e17c80b2527f332ad0bef791a7e0d81cf9a7
+// Hash: 8b5590d4a7e7101774ac858fb074719953db492e41b163d46e3793ab22ef2020
 package eth

 import (
@@ -8554,6 +8554,178 @@ func (b *BuilderBidCapella) HashTreeRootWith(hh *ssz.Hasher) (err error) {
 	return
 }

+// MarshalSSZ ssz marshals the BuilderBidDeneb object
+func (b *BuilderBidDeneb) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(b)
+}
+
+// MarshalSSZTo ssz marshals the BuilderBidDeneb object to a target array
+func (b *BuilderBidDeneb) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+	offset := int(88)
+
+	// Offset (0) 'Header'
+	dst = ssz.WriteOffset(dst, offset)
+	if b.Header == nil {
+		b.Header = new(v1.ExecutionPayloadHeaderDeneb)
+	}
+	offset += b.Header.SizeSSZ()
+
+	// Field (1) 'Value'
+	if size := len(b.Value); size != 32 {
+		err = ssz.ErrBytesLengthFn("--.Value", size, 32)
+		return
+	}
+	dst = append(dst, b.Value...)
+
+	// Field (2) 'Pubkey'
+	if size := len(b.Pubkey); size != 48 {
+		err = ssz.ErrBytesLengthFn("--.Pubkey", size, 48)
+		return
+	}
+	dst = append(dst, b.Pubkey...)
+
+	// Offset (3) 'BlindedBlobsBundle'
+	dst = ssz.WriteOffset(dst, offset)
+	if b.BlindedBlobsBundle == nil {
+		b.BlindedBlobsBundle = new(v1.BlindedBlobsBundle)
+	}
+	offset += b.BlindedBlobsBundle.SizeSSZ()
+
+	// Field (0) 'Header'
+	if dst, err = b.Header.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (3) 'BlindedBlobsBundle'
+	if dst, err = b.BlindedBlobsBundle.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the BuilderBidDeneb object
+func (b *BuilderBidDeneb) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size < 88 {
+		return ssz.ErrSize
+	}
+
+	tail := buf
+	var o0, o3 uint64
+
+	// Offset (0) 'Header'
+	if o0 = ssz.ReadOffset(buf[0:4]); o0 > size {
+		return ssz.ErrOffset
+	}
+
+	if o0 < 88 {
+		return ssz.ErrInvalidVariableOffset
+	}
+
+	// Field (1) 'Value'
+	if cap(b.Value) == 0 {
+		b.Value = make([]byte, 0, len(buf[4:36]))
+	}
+	b.Value = append(b.Value, buf[4:36]...)
+
+	// Field (2) 'Pubkey'
+	if cap(b.Pubkey) == 0 {
+		b.Pubkey = make([]byte, 0, len(buf[36:84]))
+	}
+	b.Pubkey = append(b.Pubkey, buf[36:84]...)
+
+	// Offset (3) 'BlindedBlobsBundle'
+	if o3 = ssz.ReadOffset(buf[84:88]); o3 > size || o0 > o3 {
+		return ssz.ErrOffset
+	}
+
+	// Field (0) 'Header'
+	{
+		buf = tail[o0:o3]
+		if b.Header == nil {
+			b.Header = new(v1.ExecutionPayloadHeaderDeneb)
+		}
+		if err = b.Header.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+
+	// Field (3) 'BlindedBlobsBundle'
+	{
+		buf = tail[o3:]
+		if b.BlindedBlobsBundle == nil {
+			b.BlindedBlobsBundle = new(v1.BlindedBlobsBundle)
+		}
+		if err = b.BlindedBlobsBundle.UnmarshalSSZ(buf); err != nil {
+			return err
+		}
+	}
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the BuilderBidDeneb object
+func (b *BuilderBidDeneb) SizeSSZ() (size int) {
+	size = 88
+
+	// Field (0) 'Header'
+	if b.Header == nil {
+		b.Header = new(v1.ExecutionPayloadHeaderDeneb)
+	}
+	size += b.Header.SizeSSZ()
+
+	// Field (3) 'BlindedBlobsBundle'
+	if b.BlindedBlobsBundle == nil {
+		b.BlindedBlobsBundle = new(v1.BlindedBlobsBundle)
+	}
+	size += b.BlindedBlobsBundle.SizeSSZ()
+
+	return
+}
+
+// HashTreeRoot ssz hashes the BuilderBidDeneb object
+func (b *BuilderBidDeneb) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(b)
+}
+
+// HashTreeRootWith ssz hashes the BuilderBidDeneb object with a hasher
+func (b *BuilderBidDeneb) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'Header'
+	if err = b.Header.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (1) 'Value'
+	if size := len(b.Value); size != 32 {
+		err = ssz.ErrBytesLengthFn("--.Value", size, 32)
+		return
+	}
+	hh.PutBytes(b.Value)
+
+	// Field (2) 'Pubkey'
+	if size := len(b.Pubkey); size != 48 {
+		err = ssz.ErrBytesLengthFn("--.Pubkey", size, 48)
+		return
+	}
+	hh.PutBytes(b.Pubkey)
+
+	// Field (3) 'BlindedBlobsBundle'
+	if err = b.BlindedBlobsBundle.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
+
 // MarshalSSZ ssz marshals the Deposit_Data object
 func (d *Deposit_Data) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(d)
--- a/testing/middleware/builder/builder.go
+++ b/testing/middleware/builder/builder.go
@@ -276,7 +276,7 @@ func (p *Builder) handleHeaderRequest(w http.ResponseWriter, req *http.Request)
 	ax := types.Slot(slot)
 	currEpoch := types.Epoch(ax / params.BeaconConfig().SlotsPerEpoch)
 	if currEpoch >= params.BeaconConfig().CapellaForkEpoch {
-		p.handleHeadeRequestCapella(w)
+		p.handleHeaderRequestCapella(w)
 		return
 	}

@@ -354,7 +354,7 @@ func (p *Builder) handleHeaderRequest(w http.ResponseWriter, req *http.Request)
 	w.WriteHeader(http.StatusOK)
 }

-func (p *Builder) handleHeadeRequestCapella(w http.ResponseWriter) {
+func (p *Builder) handleHeaderRequestCapella(w http.ResponseWriter) {
 	b, err := p.retrievePendingBlockCapella()
 	if err != nil {
 		p.cfg.logger.WithError(err).Error("Could not retrieve pending block")
@@ -369,9 +369,11 @@ func (p *Builder) handleHeadeRequestCapella(w http.ResponseWriter) {
 		return
 	}
 	v := big.NewInt(0).SetBytes(bytesutil.ReverseByteOrder(b.Value))
+	// we set the payload value as twice its actual one so that it always chooses builder payloads vs local payloads
 	v = v.Mul(v, big.NewInt(2))
 	// Is used as the helper modifies the big.Int
 	weiVal := big.NewInt(0).SetBytes(bytesutil.ReverseByteOrder(b.Value))
+	// we set the payload value as twice its actual one so that it always chooses builder payloads vs local payloads
 	weiVal = weiVal.Mul(weiVal, big.NewInt(2))
 	wObj, err := blocks.WrappedExecutionPayloadCapella(b.Payload, math.WeiToGwei(weiVal))
 	if err != nil {
--- a/testing/util/BUILD.bazel
+++ b/testing/util/BUILD.bazel
@@ -9,6 +9,7 @@ go_library(
        "bazel.go",
        "bellatrix.go",
        "bellatrix_state.go",
+        "blob.go",
        "block.go",
        "capella_block.go",
        "capella_state.go",
--- a/testing/util/blob.go
+++ b/testing/util/blob.go
@@ -0,0 +1,37 @@
+package util
+
+import (
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+)
+
+// HydrateSignedBlindedBlobSidecar hydrates a signed blinded blob sidecar with correct field length sizes
+// to comply with SSZ marshalling and unmarshalling rules.
+func HydrateSignedBlindedBlobSidecar(b *ethpb.SignedBlindedBlobSidecar) *ethpb.SignedBlindedBlobSidecar {
+	if b.Signature == nil {
+		b.Signature = make([]byte, fieldparams.BLSSignatureLength)
+	}
+	b.Message = HydrateBlindedBlobSidecar(b.Message)
+	return b
+}
+
+// HydrateBlindedBlobSidecar hydrates a blinded blob sidecar with correct field length sizes
+// to comply with SSZ marshalling and unmarshalling rules.
+func HydrateBlindedBlobSidecar(b *ethpb.BlindedBlobSidecar) *ethpb.BlindedBlobSidecar {
+	if b.BlockRoot == nil {
+		b.BlockRoot = make([]byte, fieldparams.RootLength)
+	}
+	if b.BlockParentRoot == nil {
+		b.BlockParentRoot = make([]byte, fieldparams.RootLength)
+	}
+	if b.KzgCommitment == nil {
+		b.KzgCommitment = make([]byte, fieldparams.BLSPubkeyLength)
+	}
+	if b.KzgProof == nil {
+		b.KzgProof = make([]byte, fieldparams.BLSPubkeyLength)
+	}
+	if b.BlobRoot == nil {
+		b.BlobRoot = make([]byte, fieldparams.RootLength)
+	}
+	return b
+}
--- a/testing/util/merge.go
+++ b/testing/util/merge.go
@@ -43,6 +43,11 @@ func NewBlindedBeaconBlockDeneb() *ethpb.SignedBlindedBeaconBlockDeneb {
 	return HydrateSignedBlindedBeaconBlockDeneb(&ethpb.SignedBlindedBeaconBlockDeneb{})
 }

+// NewBlindedBlobSidecar creates a signed blinded blob sidecar with minimum marshalable fields.
+func NewBlindedBlobSidecar() *ethpb.SignedBlindedBlobSidecar {
+	return HydrateSignedBlindedBlobSidecar(&ethpb.SignedBlindedBlobSidecar{})
+}
+
 // NewBlindedBeaconBlockCapellaV2 creates a blinded beacon block with minimum marshalable fields.
 func NewBlindedBeaconBlockCapellaV2() *v2.SignedBlindedBeaconBlockCapella {
 	return HydrateV2SignedBlindedBeaconBlockCapella(&v2.SignedBlindedBeaconBlockCapella{})