From 1829bc2d129e26b8da6d72426be21750dac7b2ee Mon Sep 17 00:00:00 2001
From: Potuz <potuz@prysmaticlabs.com>
Date: Mon, 28 Oct 2024 09:49:58 -0300
Subject: [PATCH] Helper for Payload Attestation Signing (#13901)

---
 beacon-chain/rpc/eth/config/handlers_test.go  |  12 +-
 config/params/config.go                       |   2 +-
 proto/engine/v1/epbs.pb.go                    | 389 +++---------------
 proto/engine/v1/epbs.proto                    |  19 -
 proto/prysm/v1alpha1/BUILD.bazel              |   6 +-
 proto/prysm/v1alpha1/beacon_block.pb.go       | 111 ++++-
 proto/prysm/v1alpha1/beacon_block.proto       |   3 +-
 proto/prysm/v1alpha1/generated.ssz.go         | 293 ++++++++++++-
 .../prysm/v1alpha1/payload_attestation.pb.go  | 376 +++++++++++++++++
 .../v1alpha1/payload_attestation.pb.gw.go     |   4 +
 .../prysm/v1alpha1/payload_attestation.proto  |  43 ++
 .../validator-client/keymanager.pb.go         | 201 +++++----
 .../validator-client/keymanager.pb.gw.go      |   4 +
 .../validator-client/keymanager.proto         |   4 +
 testing/util/BUILD.bazel                      |   1 +
 testing/util/payload_attestation.go           |  45 ++
 validator/client/BUILD.bazel                  |   2 +
 validator/client/payload_attestation.go       |  49 +++
 validator/client/payload_attestation_test.go  |  51 +++
 19 files changed, 1166 insertions(+), 449 deletions(-)
 create mode 100755 proto/prysm/v1alpha1/payload_attestation.pb.go
 create mode 100755 proto/prysm/v1alpha1/payload_attestation.pb.gw.go
 create mode 100644 proto/prysm/v1alpha1/payload_attestation.proto
 create mode 100755 proto/prysm/v1alpha1/validator-client/keymanager.pb.gw.go
 create mode 100644 testing/util/payload_attestation.go
 create mode 100644 validator/client/payload_attestation.go
 create mode 100644 validator/client/payload_attestation_test.go

diff --git a/beacon-chain/rpc/eth/config/handlers_test.go b/beacon-chain/rpc/eth/config/handlers_test.go
index 30bddfd24c76..201278ace3ae 100644
--- a/beacon-chain/rpc/eth/config/handlers_test.go
+++ b/beacon-chain/rpc/eth/config/handlers_test.go
@@ -20,6 +20,10 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )
 
+// Variables defined in the placeholderFields will not be tested in `TestGetSpec`.
+// These are variables that we don't use in Prysm. (i.e. future hardfork, light client... etc)
+var placeholderFields = []string{"DOMAIN_BEACON_BUILDER", "DOMAIN_PTC_ATTESTER"}
+
 func TestGetDepositContract(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	config := params.BeaconConfig().Copy()
@@ -190,7 +194,7 @@ func TestGetSpec(t *testing.T) {
 	data, ok := resp.Data.(map[string]interface{})
 	require.Equal(t, true, ok)
 
-	assert.Equal(t, 156, len(data))
+	assert.Equal(t, 157, len(data))
 	for k, v := range data {
 		t.Run(k, func(t *testing.T) {
 			switch k {
@@ -530,6 +534,12 @@ func TestGetSpec(t *testing.T) {
 			case "MAX_PENDING_DEPOSITS_PER_EPOCH":
 				assert.Equal(t, "94", v)
 			default:
+				for _, pf := range placeholderFields {
+					if k == pf {
+						t.Logf("Skipping placeholder field: %s", k)
+						return
+					}
+				}
 				t.Errorf("Incorrect key: %s", k)
 			}
 		})
diff --git a/config/params/config.go b/config/params/config.go
index 6edf23fe1c15..56bbb68779ed 100644
--- a/config/params/config.go
+++ b/config/params/config.go
@@ -125,7 +125,7 @@ type BeaconChainConfig struct {
 	DomainApplicationMask             [4]byte `yaml:"DOMAIN_APPLICATION_MASK" spec:"true"`               // DomainApplicationMask defines the BLS signature domain for application mask.
 	DomainApplicationBuilder          [4]byte `yaml:"DOMAIN_APPLICATION_BUILDER" spec:"true"`            // DomainApplicationBuilder defines the BLS signature domain for application builder.
 	DomainBLSToExecutionChange        [4]byte `yaml:"DOMAIN_BLS_TO_EXECUTION_CHANGE" spec:"true"`        // DomainBLSToExecutionChange defines the BLS signature domain to change withdrawal addresses to ETH1 prefix
-	DomainBeaconBuilder               [4]byte `yaml:"DOMAIN_BEACON_BULDER" spec:"false"`                 // DomainBeaconBuilder defines the BLS signature domain used by builders [New in ePBS]
+	DomainBeaconBuilder               [4]byte `yaml:"DOMAIN_BEACON_BUILDER" spec:"false"`                // DomainBeaconBuilder defines the BLS signature domain used by builders [New in ePBS]
 	DomainPTCAttester                 [4]byte `yaml:"DOMAIN_PTC_ATTESTER" spec:"false"`                  // DomainPTCAttester defines the BLS signature domain used by PTC members [New in ePBS]
 
 	// Prysm constants.
diff --git a/proto/engine/v1/epbs.pb.go b/proto/engine/v1/epbs.pb.go
index 324755ca910b..52210801db76 100755
--- a/proto/engine/v1/epbs.pb.go
+++ b/proto/engine/v1/epbs.pb.go
@@ -10,7 +10,6 @@ import (
 	reflect "reflect"
 	sync "sync"
 
-	github_com_prysmaticlabs_go_bitfield "github.com/prysmaticlabs/go-bitfield"
 	github_com_prysmaticlabs_prysm_v5_consensus_types_primitives "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	_ "github.com/prysmaticlabs/prysm/v5/proto/eth/ext"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
@@ -24,195 +23,6 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-type PayloadAttestationData struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	BeaconBlockRoot []byte                                                                 `protobuf:"bytes,1,opt,name=beacon_block_root,json=beaconBlockRoot,proto3" json:"beacon_block_root,omitempty" ssz-size:"32"`
-	Slot            github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot      `protobuf:"varint,2,opt,name=slot,proto3" json:"slot,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"`
-	PayloadStatus   github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus `protobuf:"varint,3,opt,name=payload_status,json=payloadStatus,proto3" json:"payload_status,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.PTCStatus"`
-}
-
-func (x *PayloadAttestationData) Reset() {
-	*x = PayloadAttestationData{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[0]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *PayloadAttestationData) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*PayloadAttestationData) ProtoMessage() {}
-
-func (x *PayloadAttestationData) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[0]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use PayloadAttestationData.ProtoReflect.Descriptor instead.
-func (*PayloadAttestationData) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{0}
-}
-
-func (x *PayloadAttestationData) GetBeaconBlockRoot() []byte {
-	if x != nil {
-		return x.BeaconBlockRoot
-	}
-	return nil
-}
-
-func (x *PayloadAttestationData) GetSlot() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot {
-	if x != nil {
-		return x.Slot
-	}
-	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(0)
-}
-
-func (x *PayloadAttestationData) GetPayloadStatus() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus {
-	if x != nil {
-		return x.PayloadStatus
-	}
-	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus(0)
-}
-
-type PayloadAttestation struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	AggregationBits github_com_prysmaticlabs_go_bitfield.Bitvector512 `protobuf:"bytes,1,opt,name=aggregation_bits,json=aggregationBits,proto3" json:"aggregation_bits,omitempty" cast-type:"github.com/prysmaticlabs/go-bitfield.Bitvector512" ssz-size:"64"`
-	Data            *PayloadAttestationData                           `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
-	Signature       []byte                                            `protobuf:"bytes,3,opt,name=signature,proto3" json:"signature,omitempty" ssz-size:"96"`
-}
-
-func (x *PayloadAttestation) Reset() {
-	*x = PayloadAttestation{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[1]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *PayloadAttestation) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*PayloadAttestation) ProtoMessage() {}
-
-func (x *PayloadAttestation) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[1]
-	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 PayloadAttestation.ProtoReflect.Descriptor instead.
-func (*PayloadAttestation) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{1}
-}
-
-func (x *PayloadAttestation) GetAggregationBits() github_com_prysmaticlabs_go_bitfield.Bitvector512 {
-	if x != nil {
-		return x.AggregationBits
-	}
-	return github_com_prysmaticlabs_go_bitfield.Bitvector512(nil)
-}
-
-func (x *PayloadAttestation) GetData() *PayloadAttestationData {
-	if x != nil {
-		return x.Data
-	}
-	return nil
-}
-
-func (x *PayloadAttestation) GetSignature() []byte {
-	if x != nil {
-		return x.Signature
-	}
-	return nil
-}
-
-type PayloadAttestationMessage struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	ValidatorIndex github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex `protobuf:"varint,1,opt,name=validator_index,json=validatorIndex,proto3" json:"validator_index,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"`
-	Data           *PayloadAttestationData                                                     `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
-	Signature      []byte                                                                      `protobuf:"bytes,3,opt,name=signature,proto3" json:"signature,omitempty" ssz-size:"96"`
-}
-
-func (x *PayloadAttestationMessage) Reset() {
-	*x = PayloadAttestationMessage{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[2]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *PayloadAttestationMessage) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*PayloadAttestationMessage) ProtoMessage() {}
-
-func (x *PayloadAttestationMessage) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[2]
-	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 PayloadAttestationMessage.ProtoReflect.Descriptor instead.
-func (*PayloadAttestationMessage) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{2}
-}
-
-func (x *PayloadAttestationMessage) GetValidatorIndex() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex {
-	if x != nil {
-		return x.ValidatorIndex
-	}
-	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex(0)
-}
-
-func (x *PayloadAttestationMessage) GetData() *PayloadAttestationData {
-	if x != nil {
-		return x.Data
-	}
-	return nil
-}
-
-func (x *PayloadAttestationMessage) GetSignature() []byte {
-	if x != nil {
-		return x.Signature
-	}
-	return nil
-}
-
 type InclusionListSummary struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -226,7 +36,7 @@ type InclusionListSummary struct {
 func (x *InclusionListSummary) Reset() {
 	*x = InclusionListSummary{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[3]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[0]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -239,7 +49,7 @@ func (x *InclusionListSummary) String() string {
 func (*InclusionListSummary) ProtoMessage() {}
 
 func (x *InclusionListSummary) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[3]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[0]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -252,7 +62,7 @@ func (x *InclusionListSummary) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InclusionListSummary.ProtoReflect.Descriptor instead.
 func (*InclusionListSummary) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{3}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{0}
 }
 
 func (x *InclusionListSummary) GetProposerIndex() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex {
@@ -288,7 +98,7 @@ type SignedInclusionListSummary struct {
 func (x *SignedInclusionListSummary) Reset() {
 	*x = SignedInclusionListSummary{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[4]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[1]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -301,7 +111,7 @@ func (x *SignedInclusionListSummary) String() string {
 func (*SignedInclusionListSummary) ProtoMessage() {}
 
 func (x *SignedInclusionListSummary) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[4]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[1]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -314,7 +124,7 @@ func (x *SignedInclusionListSummary) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SignedInclusionListSummary.ProtoReflect.Descriptor instead.
 func (*SignedInclusionListSummary) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{4}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{1}
 }
 
 func (x *SignedInclusionListSummary) GetMessage() *InclusionListSummary {
@@ -344,7 +154,7 @@ type InclusionList struct {
 func (x *InclusionList) Reset() {
 	*x = InclusionList{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[5]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -357,7 +167,7 @@ func (x *InclusionList) String() string {
 func (*InclusionList) ProtoMessage() {}
 
 func (x *InclusionList) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[5]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -370,7 +180,7 @@ func (x *InclusionList) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InclusionList.ProtoReflect.Descriptor instead.
 func (*InclusionList) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{5}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *InclusionList) GetSignedSummary() *SignedInclusionListSummary {
@@ -411,7 +221,7 @@ type ExecutionPayloadHeaderEPBS struct {
 func (x *ExecutionPayloadHeaderEPBS) Reset() {
 	*x = ExecutionPayloadHeaderEPBS{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[6]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -424,7 +234,7 @@ func (x *ExecutionPayloadHeaderEPBS) String() string {
 func (*ExecutionPayloadHeaderEPBS) ProtoMessage() {}
 
 func (x *ExecutionPayloadHeaderEPBS) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[6]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -437,7 +247,7 @@ func (x *ExecutionPayloadHeaderEPBS) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExecutionPayloadHeaderEPBS.ProtoReflect.Descriptor instead.
 func (*ExecutionPayloadHeaderEPBS) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{6}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *ExecutionPayloadHeaderEPBS) GetParentBlockHash() []byte {
@@ -517,7 +327,7 @@ type ExecutionPayloadEPBS struct {
 func (x *ExecutionPayloadEPBS) Reset() {
 	*x = ExecutionPayloadEPBS{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[7]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -530,7 +340,7 @@ func (x *ExecutionPayloadEPBS) String() string {
 func (*ExecutionPayloadEPBS) ProtoMessage() {}
 
 func (x *ExecutionPayloadEPBS) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[7]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -543,7 +353,7 @@ func (x *ExecutionPayloadEPBS) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExecutionPayloadEPBS.ProtoReflect.Descriptor instead.
 func (*ExecutionPayloadEPBS) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{7}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *ExecutionPayloadEPBS) GetParentHash() []byte {
@@ -684,7 +494,7 @@ type SignedExecutionPayloadHeader struct {
 func (x *SignedExecutionPayloadHeader) Reset() {
 	*x = SignedExecutionPayloadHeader{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[8]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -697,7 +507,7 @@ func (x *SignedExecutionPayloadHeader) String() string {
 func (*SignedExecutionPayloadHeader) ProtoMessage() {}
 
 func (x *SignedExecutionPayloadHeader) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[8]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -710,7 +520,7 @@ func (x *SignedExecutionPayloadHeader) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SignedExecutionPayloadHeader.ProtoReflect.Descriptor instead.
 func (*SignedExecutionPayloadHeader) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{8}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *SignedExecutionPayloadHeader) GetMessage() *ExecutionPayloadHeader {
@@ -746,7 +556,7 @@ type ExecutionPayloadEnvelope struct {
 func (x *ExecutionPayloadEnvelope) Reset() {
 	*x = ExecutionPayloadEnvelope{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[9]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -759,7 +569,7 @@ func (x *ExecutionPayloadEnvelope) String() string {
 func (*ExecutionPayloadEnvelope) ProtoMessage() {}
 
 func (x *ExecutionPayloadEnvelope) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[9]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -772,7 +582,7 @@ func (x *ExecutionPayloadEnvelope) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExecutionPayloadEnvelope.ProtoReflect.Descriptor instead.
 func (*ExecutionPayloadEnvelope) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{9}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *ExecutionPayloadEnvelope) GetPayload() *ExecutionPayloadEPBS {
@@ -850,7 +660,7 @@ type SignedExecutionPayloadEnvelope struct {
 func (x *SignedExecutionPayloadEnvelope) Reset() {
 	*x = SignedExecutionPayloadEnvelope{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_proto_engine_v1_epbs_proto_msgTypes[10]
+		mi := &file_proto_engine_v1_epbs_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -863,7 +673,7 @@ func (x *SignedExecutionPayloadEnvelope) String() string {
 func (*SignedExecutionPayloadEnvelope) ProtoMessage() {}
 
 func (x *SignedExecutionPayloadEnvelope) ProtoReflect() protoreflect.Message {
-	mi := &file_proto_engine_v1_epbs_proto_msgTypes[10]
+	mi := &file_proto_engine_v1_epbs_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -876,7 +686,7 @@ func (x *SignedExecutionPayloadEnvelope) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SignedExecutionPayloadEnvelope.ProtoReflect.Descriptor instead.
 func (*SignedExecutionPayloadEnvelope) Descriptor() ([]byte, []int) {
-	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{10}
+	return file_proto_engine_v1_epbs_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *SignedExecutionPayloadEnvelope) GetMessage() *ExecutionPayloadEnvelope {
@@ -903,55 +713,7 @@ var file_proto_engine_v1_epbs_proto_rawDesc = []byte{
 	0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x26, 0x70,
 	0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x65, 0x6e, 0x67, 0x69, 0x6e, 0x65, 0x2f, 0x76, 0x31, 0x2f, 0x65,
 	0x78, 0x65, 0x63, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x5f, 0x65, 0x6e, 0x67, 0x69, 0x6e, 0x65, 0x2e,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x9a, 0x02, 0x0a, 0x16, 0x50, 0x61, 0x79, 0x6c, 0x6f, 0x61,
-	0x64, 0x41, 0x74, 0x74, 0x65, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x44, 0x61, 0x74, 0x61,
-	0x12, 0x32, 0x0a, 0x11, 0x62, 0x65, 0x61, 0x63, 0x6f, 0x6e, 0x5f, 0x62, 0x6c, 0x6f, 0x63, 0x6b,
-	0x5f, 0x72, 0x6f, 0x6f, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x42, 0x06, 0x8a, 0xb5, 0x18,
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@@ -1161,36 +923,31 @@ func file_proto_engine_v1_epbs_proto_rawDescGZIP() []byte {
 	return file_proto_engine_v1_epbs_proto_rawDescData
 }
 
-var file_proto_engine_v1_epbs_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
+var file_proto_engine_v1_epbs_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
 var file_proto_engine_v1_epbs_proto_goTypes = []interface{}{
-	(*PayloadAttestationData)(nil),         // 0: ethereum.engine.v1.PayloadAttestationData
-	(*PayloadAttestation)(nil),             // 1: ethereum.engine.v1.PayloadAttestation
-	(*PayloadAttestationMessage)(nil),      // 2: ethereum.engine.v1.PayloadAttestationMessage
-	(*InclusionListSummary)(nil),           // 3: ethereum.engine.v1.InclusionListSummary
-	(*SignedInclusionListSummary)(nil),     // 4: ethereum.engine.v1.SignedInclusionListSummary
-	(*InclusionList)(nil),                  // 5: ethereum.engine.v1.InclusionList
-	(*ExecutionPayloadHeaderEPBS)(nil),     // 6: ethereum.engine.v1.ExecutionPayloadHeaderEPBS
-	(*ExecutionPayloadEPBS)(nil),           // 7: ethereum.engine.v1.ExecutionPayloadEPBS
-	(*SignedExecutionPayloadHeader)(nil),   // 8: ethereum.engine.v1.SignedExecutionPayloadHeader
-	(*ExecutionPayloadEnvelope)(nil),       // 9: ethereum.engine.v1.ExecutionPayloadEnvelope
-	(*SignedExecutionPayloadEnvelope)(nil), // 10: ethereum.engine.v1.SignedExecutionPayloadEnvelope
-	(*Withdrawal)(nil),                     // 11: ethereum.engine.v1.Withdrawal
-	(*ExecutionPayloadHeader)(nil),         // 12: ethereum.engine.v1.ExecutionPayloadHeader
+	(*InclusionListSummary)(nil),           // 0: ethereum.engine.v1.InclusionListSummary
+	(*SignedInclusionListSummary)(nil),     // 1: ethereum.engine.v1.SignedInclusionListSummary
+	(*InclusionList)(nil),                  // 2: ethereum.engine.v1.InclusionList
+	(*ExecutionPayloadHeaderEPBS)(nil),     // 3: ethereum.engine.v1.ExecutionPayloadHeaderEPBS
+	(*ExecutionPayloadEPBS)(nil),           // 4: ethereum.engine.v1.ExecutionPayloadEPBS
+	(*SignedExecutionPayloadHeader)(nil),   // 5: ethereum.engine.v1.SignedExecutionPayloadHeader
+	(*ExecutionPayloadEnvelope)(nil),       // 6: ethereum.engine.v1.ExecutionPayloadEnvelope
+	(*SignedExecutionPayloadEnvelope)(nil), // 7: ethereum.engine.v1.SignedExecutionPayloadEnvelope
+	(*Withdrawal)(nil),                     // 8: ethereum.engine.v1.Withdrawal
+	(*ExecutionPayloadHeader)(nil),         // 9: ethereum.engine.v1.ExecutionPayloadHeader
 }
 var file_proto_engine_v1_epbs_proto_depIdxs = []int32{
-	0,  // 0: ethereum.engine.v1.PayloadAttestation.data:type_name -> ethereum.engine.v1.PayloadAttestationData
-	0,  // 1: ethereum.engine.v1.PayloadAttestationMessage.data:type_name -> ethereum.engine.v1.PayloadAttestationData
-	3,  // 2: ethereum.engine.v1.SignedInclusionListSummary.message:type_name -> ethereum.engine.v1.InclusionListSummary
-	4,  // 3: ethereum.engine.v1.InclusionList.signed_summary:type_name -> ethereum.engine.v1.SignedInclusionListSummary
-	11, // 4: ethereum.engine.v1.ExecutionPayloadEPBS.withdrawals:type_name -> ethereum.engine.v1.Withdrawal
-	12, // 5: ethereum.engine.v1.SignedExecutionPayloadHeader.message:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
-	7,  // 6: ethereum.engine.v1.ExecutionPayloadEnvelope.payload:type_name -> ethereum.engine.v1.ExecutionPayloadEPBS
-	9,  // 7: ethereum.engine.v1.SignedExecutionPayloadEnvelope.message:type_name -> ethereum.engine.v1.ExecutionPayloadEnvelope
-	8,  // [8:8] is the sub-list for method output_type
-	8,  // [8:8] is the sub-list for method input_type
-	8,  // [8:8] is the sub-list for extension type_name
-	8,  // [8:8] is the sub-list for extension extendee
-	0,  // [0:8] is the sub-list for field type_name
+	0, // 0: ethereum.engine.v1.SignedInclusionListSummary.message:type_name -> ethereum.engine.v1.InclusionListSummary
+	1, // 1: ethereum.engine.v1.InclusionList.signed_summary:type_name -> ethereum.engine.v1.SignedInclusionListSummary
+	8, // 2: ethereum.engine.v1.ExecutionPayloadEPBS.withdrawals:type_name -> ethereum.engine.v1.Withdrawal
+	9, // 3: ethereum.engine.v1.SignedExecutionPayloadHeader.message:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
+	4, // 4: ethereum.engine.v1.ExecutionPayloadEnvelope.payload:type_name -> ethereum.engine.v1.ExecutionPayloadEPBS
+	6, // 5: ethereum.engine.v1.SignedExecutionPayloadEnvelope.message:type_name -> ethereum.engine.v1.ExecutionPayloadEnvelope
+	6, // [6:6] is the sub-list for method output_type
+	6, // [6:6] is the sub-list for method input_type
+	6, // [6:6] is the sub-list for extension type_name
+	6, // [6:6] is the sub-list for extension extendee
+	0, // [0:6] is the sub-list for field type_name
 }
 
 func init() { file_proto_engine_v1_epbs_proto_init() }
@@ -1201,42 +958,6 @@ func file_proto_engine_v1_epbs_proto_init() {
 	file_proto_engine_v1_execution_engine_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_proto_engine_v1_epbs_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PayloadAttestationData); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_proto_engine_v1_epbs_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PayloadAttestation); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_proto_engine_v1_epbs_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PayloadAttestationMessage); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-		file_proto_engine_v1_epbs_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*InclusionListSummary); i {
 			case 0:
 				return &v.state
@@ -1248,7 +969,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SignedInclusionListSummary); i {
 			case 0:
 				return &v.state
@@ -1260,7 +981,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*InclusionList); i {
 			case 0:
 				return &v.state
@@ -1272,7 +993,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ExecutionPayloadHeaderEPBS); i {
 			case 0:
 				return &v.state
@@ -1284,7 +1005,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ExecutionPayloadEPBS); i {
 			case 0:
 				return &v.state
@@ -1296,7 +1017,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SignedExecutionPayloadHeader); i {
 			case 0:
 				return &v.state
@@ -1308,7 +1029,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ExecutionPayloadEnvelope); i {
 			case 0:
 				return &v.state
@@ -1320,7 +1041,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 				return nil
 			}
 		}
-		file_proto_engine_v1_epbs_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+		file_proto_engine_v1_epbs_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SignedExecutionPayloadEnvelope); i {
 			case 0:
 				return &v.state
@@ -1339,7 +1060,7 @@ func file_proto_engine_v1_epbs_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_engine_v1_epbs_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   11,
+			NumMessages:   8,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/proto/engine/v1/epbs.proto b/proto/engine/v1/epbs.proto
index 48f775e95a33..a708bca39529 100644
--- a/proto/engine/v1/epbs.proto
+++ b/proto/engine/v1/epbs.proto
@@ -25,25 +25,6 @@ option java_outer_classname = "ExecutionEngineProto";
 option java_package = "org.ethereum.engine.v1";
 option php_namespace = "Ethereum\\Engine\\v1";
 
-
-message PayloadAttestationData {
-	bytes beacon_block_root = 1 [(ethereum.eth.ext.ssz_size) = "32"];
-	uint64 slot 		= 2 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
-	uint64 payload_status 	= 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.PTCStatus"];
-}
-
-message PayloadAttestation {
-  	bytes aggregation_bits          = 1 [(ethereum.eth.ext.ssz_size) = "ptc.size", (ethereum.eth.ext.cast_type) = "ptc.type"];
-	PayloadAttestationData data 	= 2;
-    	bytes signature 		= 3 [(ethereum.eth.ext.ssz_size) = "96"];
-}
-
-message PayloadAttestationMessage {
-	uint64 validator_index 		= 1 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"];
-	PayloadAttestationData data 	= 2;
-    	bytes signature 		= 3 [(ethereum.eth.ext.ssz_size) = "96"];
-}
-
 message InclusionListSummary {
 	uint64 proposer_index  = 1 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"];
 	uint64 slot 	       = 2 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
diff --git a/proto/prysm/v1alpha1/BUILD.bazel b/proto/prysm/v1alpha1/BUILD.bazel
index ca117ad99b3e..af4fcc77eb82 100644
--- a/proto/prysm/v1alpha1/BUILD.bazel
+++ b/proto/prysm/v1alpha1/BUILD.bazel
@@ -182,6 +182,9 @@ ssz_fulu_objs = [
 ssz_epbs_objs = [
 	"BeaconBlockePBS",
 	"SignedBeaconBlockePBS",
+	"PayloadAttestationData",
+	"PayloadAttestation",
+	"PayloadAttestationMessage",
 ]
 
 ssz_gen_marshal(
@@ -284,7 +287,7 @@ ssz_gen_marshal(
         "//math:go_default_library",
     ],
     objs = ssz_epbs_objs,
-    exclude_objs = ssz_phase0_objs + ssz_altair_objs + ssz_bellatrix_objs  + ssz_capella_objs + ssz_deneb_objs + ssz_epbs_objs,
+    exclude_objs = ssz_phase0_objs + ssz_altair_objs + ssz_bellatrix_objs  + ssz_capella_objs + ssz_deneb_objs + ssz_electra_objs,
 )
 
 ssz_gen_marshal(
@@ -395,6 +398,7 @@ ssz_proto_files(
         "blobs.proto",
         "light_client.proto",
         "data_columns.proto",
+        "payload_attestation.proto",
         "sync_committee.proto",
         "withdrawals.proto",
     ],
diff --git a/proto/prysm/v1alpha1/beacon_block.pb.go b/proto/prysm/v1alpha1/beacon_block.pb.go
index 37670731bd88..bfd6cd906d19 100755
--- a/proto/prysm/v1alpha1/beacon_block.pb.go
+++ b/proto/prysm/v1alpha1/beacon_block.pb.go
@@ -4789,7 +4789,7 @@ type BeaconBlockBodyePBS struct {
 	SyncAggregate                *SyncAggregate                   `protobuf:"bytes,9,opt,name=sync_aggregate,json=syncAggregate,proto3" json:"sync_aggregate,omitempty"`
 	BlsToExecutionChanges        []*SignedBLSToExecutionChange    `protobuf:"bytes,10,rep,name=bls_to_execution_changes,json=blsToExecutionChanges,proto3" json:"bls_to_execution_changes,omitempty" ssz-max:"16"`
 	SignedExecutionPayloadHeader *v1.SignedExecutionPayloadHeader `protobuf:"bytes,11,opt,name=signed_execution_payload_header,json=signedExecutionPayloadHeader,proto3" json:"signed_execution_payload_header,omitempty"`
-	PayloadAttestations          []*v1.PayloadAttestation         `protobuf:"bytes,12,rep,name=payload_attestations,json=payloadAttestations,proto3" json:"payload_attestations,omitempty" ssz-max:"4"`
+	PayloadAttestations          []*PayloadAttestation            `protobuf:"bytes,12,rep,name=payload_attestations,json=payloadAttestations,proto3" json:"payload_attestations,omitempty" ssz-max:"4"`
 }
 
 func (x *BeaconBlockBodyePBS) Reset() {
@@ -4901,7 +4901,7 @@ func (x *BeaconBlockBodyePBS) GetSignedExecutionPayloadHeader() *v1.SignedExecut
 	return nil
 }
 
-func (x *BeaconBlockBodyePBS) GetPayloadAttestations() []*v1.PayloadAttestation {
+func (x *BeaconBlockBodyePBS) GetPayloadAttestations() []*PayloadAttestation {
 	if x != nil {
 		return x.PayloadAttestations
 	}
@@ -5045,6 +5045,9 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{
 	0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x26, 0x70,
 	0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x70, 0x72, 0x79, 0x73, 0x6d, 0x2f, 0x76, 0x31, 0x61, 0x6c, 0x70,
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+	0x73, 0x6d, 0x2f, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x2f, 0x70, 0x61, 0x79, 0x6c,
+	0x6f, 0x61, 0x64, 0x5f, 0x61, 0x74, 0x74, 0x65, 0x73, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e,
 	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x26, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x70, 0x72, 0x79,
 	0x73, 0x6d, 0x2f, 0x76, 0x31, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x31, 0x2f, 0x77, 0x69, 0x74, 0x68,
 	0x64, 0x72, 0x61, 0x77, 0x61, 0x6c, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x26, 0x70,
@@ -5668,6 +5671,7 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{
 	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, 0x35, 0x2f, 0x63, 0x6f,
 	0x6e, 0x73, 0x65, 0x6e, 0x73, 0x75, 0x73, 0x2d, 0x74, 0x79, 0x70, 0x65, 0x73, 0x2f, 0x70, 0x72,
+<<<<<<< HEAD
 	0x69, 0x6d, 0x69, 0x74, 0x69, 0x76, 0x65, 0x73, 0x2e, 0x53, 0x6c, 0x6f, 0x74, 0x52, 0x04, 0x73,
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@@ -5779,6 +5783,21 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{
 	0x63, 0x6b, 0x42, 0x6f, 0x64, 0x79, 0x43, 0x61, 0x70, 0x65, 0x6c, 0x6c, 0x61, 0x52, 0x04, 0x62,
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+>>>>>>> 23c19cffca (Helper for Payload Attestation Signing (#13901))
 	0x0a, 0x0d, 0x72, 0x61, 0x6e, 0x64, 0x61, 0x6f, 0x5f, 0x72, 0x65, 0x76, 0x65, 0x61, 0x6c, 0x18,
 	0x01, 0x20, 0x01, 0x28, 0x0c, 0x42, 0x06, 0x8a, 0xb5, 0x18, 0x02, 0x39, 0x36, 0x52, 0x0c, 0x72,
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@@ -6256,6 +6275,7 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{
 	0x73, 0x74, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x56, 0x31, 0x12, 0x50, 0x0a, 0x08, 0x6d,
 	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x34, 0x2e,
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+<<<<<<< HEAD
 	0x6c, 0x70, 0x68, 0x61, 0x31, 0x2e, 0x53, 0x69, 0x67, 0x6e, 0x65, 0x64, 0x56, 0x61, 0x6c, 0x69,
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@@ -6456,6 +6476,44 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{
 	0x70, 0x68, 0x61, 0x31, 0xca, 0x02, 0x15, 0x45, 0x74, 0x68, 0x65, 0x72, 0x65, 0x75, 0x6d, 0x5c,
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+>>>>>>> 23c19cffca (Helper for Payload Attestation Signing (#13901))
 }
 
 var (
@@ -6545,9 +6603,16 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_goTypes = []interface{}{
 	(*v1.ExecutionPayloadHeaderCapella)(nil),  // 70: ethereum.engine.v1.ExecutionPayloadHeaderCapella
 	(*v1.ExecutionPayloadHeaderDeneb)(nil),    // 71: ethereum.engine.v1.ExecutionPayloadHeaderDeneb
 	(*AttestationElectra)(nil),                // 72: ethereum.eth.v1alpha1.AttestationElectra
+<<<<<<< HEAD
 	(*v1.ExecutionRequests)(nil),              // 73: ethereum.engine.v1.ExecutionRequests
 	(*v1.SignedExecutionPayloadHeader)(nil),   // 74: ethereum.engine.v1.SignedExecutionPayloadHeader
 	(*v1.PayloadAttestation)(nil),             // 75: ethereum.engine.v1.PayloadAttestation
+=======
+	(*v1.ExecutionPayloadElectra)(nil),        // 73: ethereum.engine.v1.ExecutionPayloadElectra
+	(*v1.ExecutionPayloadHeaderElectra)(nil),  // 74: ethereum.engine.v1.ExecutionPayloadHeaderElectra
+	(*v1.SignedExecutionPayloadHeader)(nil),   // 75: ethereum.engine.v1.SignedExecutionPayloadHeader
+	(*PayloadAttestation)(nil),                // 76: ethereum.eth.v1alpha1.PayloadAttestation
+>>>>>>> 23c19cffca (Helper for Payload Attestation Signing (#13901))
 }
 var file_proto_prysm_v1alpha1_beacon_block_proto_depIdxs = []int32{
 	3,   // 0: ethereum.eth.v1alpha1.GenericSignedBeaconBlock.phase0:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlock
@@ -6679,6 +6744,7 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_depIdxs = []int32{
 	19,  // 126: ethereum.eth.v1alpha1.BeaconBlockBodyElectra.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
 	67,  // 127: ethereum.eth.v1alpha1.BeaconBlockBodyElectra.execution_payload:type_name -> ethereum.engine.v1.ExecutionPayloadDeneb
 	68,  // 128: ethereum.eth.v1alpha1.BeaconBlockBodyElectra.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+<<<<<<< HEAD
 	73,  // 129: ethereum.eth.v1alpha1.BeaconBlockBodyElectra.execution_requests:type_name -> ethereum.engine.v1.ExecutionRequests
 	46,  // 130: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockElectra.message:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockElectra
 	47,  // 131: ethereum.eth.v1alpha1.BlindedBeaconBlockElectra.body:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra
@@ -6719,6 +6785,46 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_depIdxs = []int32{
 	164, // [164:164] is the sub-list for extension type_name
 	164, // [164:164] is the sub-list for extension extendee
 	0,   // [0:164] is the sub-list for field type_name
+=======
+	46,  // 129: ethereum.eth.v1alpha1.SignedBlindedBeaconBlockElectra.message:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockElectra
+	47,  // 130: ethereum.eth.v1alpha1.BlindedBeaconBlockElectra.body:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra
+	14,  // 131: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
+	8,   // 132: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
+	10,  // 133: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashingElectra
+	72,  // 134: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.attestations:type_name -> ethereum.eth.v1alpha1.AttestationElectra
+	11,  // 135: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
+	13,  // 136: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
+	19,  // 137: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	74,  // 138: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.execution_payload_header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderElectra
+	68,  // 139: ethereum.eth.v1alpha1.BlindedBeaconBlockBodyElectra.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	50,  // 140: ethereum.eth.v1alpha1.SignedValidatorRegistrationsV1.messages:type_name -> ethereum.eth.v1alpha1.SignedValidatorRegistrationV1
+	48,  // 141: ethereum.eth.v1alpha1.SignedValidatorRegistrationV1.message:type_name -> ethereum.eth.v1alpha1.ValidatorRegistrationV1
+	66,  // 142: ethereum.eth.v1alpha1.BuilderBid.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeader
+	51,  // 143: ethereum.eth.v1alpha1.SignedBuilderBid.message:type_name -> ethereum.eth.v1alpha1.BuilderBid
+	70,  // 144: ethereum.eth.v1alpha1.BuilderBidCapella.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderCapella
+	53,  // 145: ethereum.eth.v1alpha1.SignedBuilderBidCapella.message:type_name -> ethereum.eth.v1alpha1.BuilderBidCapella
+	71,  // 146: ethereum.eth.v1alpha1.BuilderBidDeneb.header:type_name -> ethereum.engine.v1.ExecutionPayloadHeaderDeneb
+	55,  // 147: ethereum.eth.v1alpha1.SignedBuilderBidDeneb.message:type_name -> ethereum.eth.v1alpha1.BuilderBidDeneb
+	16,  // 148: ethereum.eth.v1alpha1.BlobSidecar.signed_block_header:type_name -> ethereum.eth.v1alpha1.SignedBeaconBlockHeader
+	57,  // 149: ethereum.eth.v1alpha1.BlobSidecars.sidecars:type_name -> ethereum.eth.v1alpha1.BlobSidecar
+	60,  // 150: ethereum.eth.v1alpha1.BeaconBlockePBS.body:type_name -> ethereum.eth.v1alpha1.BeaconBlockBodyePBS
+	14,  // 151: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.eth1_data:type_name -> ethereum.eth.v1alpha1.Eth1Data
+	8,   // 152: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.proposer_slashings:type_name -> ethereum.eth.v1alpha1.ProposerSlashing
+	9,   // 153: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.attester_slashings:type_name -> ethereum.eth.v1alpha1.AttesterSlashing
+	63,  // 154: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.attestations:type_name -> ethereum.eth.v1alpha1.Attestation
+	11,  // 155: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.deposits:type_name -> ethereum.eth.v1alpha1.Deposit
+	13,  // 156: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.voluntary_exits:type_name -> ethereum.eth.v1alpha1.SignedVoluntaryExit
+	19,  // 157: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.sync_aggregate:type_name -> ethereum.eth.v1alpha1.SyncAggregate
+	68,  // 158: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.bls_to_execution_changes:type_name -> ethereum.eth.v1alpha1.SignedBLSToExecutionChange
+	75,  // 159: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.signed_execution_payload_header:type_name -> ethereum.engine.v1.SignedExecutionPayloadHeader
+	76,  // 160: ethereum.eth.v1alpha1.BeaconBlockBodyePBS.payload_attestations:type_name -> ethereum.eth.v1alpha1.PayloadAttestation
+	59,  // 161: ethereum.eth.v1alpha1.SignedBeaconBlockePBS.block:type_name -> ethereum.eth.v1alpha1.BeaconBlockePBS
+	162, // [162:162] is the sub-list for method output_type
+	162, // [162:162] is the sub-list for method input_type
+	162, // [162:162] is the sub-list for extension type_name
+	162, // [162:162] is the sub-list for extension extendee
+	0,   // [0:162] is the sub-list for field type_name
+>>>>>>> 23c19cffca (Helper for Payload Attestation Signing (#13901))
 }
 
 func init() { file_proto_prysm_v1alpha1_beacon_block_proto_init() }
@@ -6727,6 +6833,7 @@ func file_proto_prysm_v1alpha1_beacon_block_proto_init() {
 		return
 	}
 	file_proto_prysm_v1alpha1_attestation_proto_init()
+	file_proto_prysm_v1alpha1_payload_attestation_proto_init()
 	file_proto_prysm_v1alpha1_withdrawals_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_proto_prysm_v1alpha1_beacon_block_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
diff --git a/proto/prysm/v1alpha1/beacon_block.proto b/proto/prysm/v1alpha1/beacon_block.proto
index e4c49d06117b..a464d7e60a7e 100644
--- a/proto/prysm/v1alpha1/beacon_block.proto
+++ b/proto/prysm/v1alpha1/beacon_block.proto
@@ -17,6 +17,7 @@ package ethereum.eth.v1alpha1;
 
 import "proto/eth/ext/options.proto";
 import "proto/prysm/v1alpha1/attestation.proto";
+import "proto/prysm/v1alpha1/payload_attestation.proto";
 import "proto/prysm/v1alpha1/withdrawals.proto";
 import "proto/engine/v1/execution_engine.proto";
 import "proto/engine/v1/electra.proto";
@@ -1017,7 +1018,7 @@ message BeaconBlockBodyePBS {
     ethereum.engine.v1.SignedExecutionPayloadHeader signed_execution_payload_header = 11; 
 
     // Payload attestations. New in ePBS
-    repeated ethereum.engine.v1.PayloadAttestation payload_attestations = 12 [(ethereum.eth.ext.ssz_max) = "payload_attestation.size"];
+    repeated PayloadAttestation payload_attestations = 12 [(ethereum.eth.ext.ssz_max) = "payload_attestation.size"];
 }
 
 message SignedBeaconBlockePBS {
diff --git a/proto/prysm/v1alpha1/generated.ssz.go b/proto/prysm/v1alpha1/generated.ssz.go
index 928f7fddb85e..945f135cfbb8 100644
--- 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: 5ebf8b5a0edaf5de61f82f703c6646891a5375726867dca26f21f8a5e1e6ca59
+// Hash: 6d4d64999bdb99ed147e3ac5088f6ea550718311bbace9097827092f63a2feb7
 package eth
 
 import (
@@ -12633,10 +12633,10 @@ func (b *BeaconBlockBodyePBS) UnmarshalSSZ(buf []byte) error {
 		if err != nil {
 			return err
 		}
-		b.PayloadAttestations = make([]*v1.PayloadAttestation, num)
+		b.PayloadAttestations = make([]*PayloadAttestation, num)
 		for ii := 0; ii < num; ii++ {
 			if b.PayloadAttestations[ii] == nil {
-				b.PayloadAttestations[ii] = new(v1.PayloadAttestation)
+				b.PayloadAttestations[ii] = new(PayloadAttestation)
 			}
 			if err = b.PayloadAttestations[ii].UnmarshalSSZ(buf[ii*208 : (ii+1)*208]); err != nil {
 				return err
@@ -20703,6 +20703,293 @@ func (b *BlobSidecarsByRangeRequest) HashTreeRootWith(hh *ssz.Hasher) (err error
 	return
 }
 
+// MarshalSSZ ssz marshals the PayloadAttestationData object
+func (p *PayloadAttestationData) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(p)
+}
+
+// MarshalSSZTo ssz marshals the PayloadAttestationData object to a target array
+func (p *PayloadAttestationData) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'BeaconBlockRoot'
+	if size := len(p.BeaconBlockRoot); size != 32 {
+		err = ssz.ErrBytesLengthFn("--.BeaconBlockRoot", size, 32)
+		return
+	}
+	dst = append(dst, p.BeaconBlockRoot...)
+
+	// Field (1) 'Slot'
+	dst = ssz.MarshalUint64(dst, uint64(p.Slot))
+
+	// Field (2) 'PayloadStatus'
+	dst = ssz.MarshalUint64(dst, uint64(p.PayloadStatus))
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the PayloadAttestationData object
+func (p *PayloadAttestationData) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 48 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'BeaconBlockRoot'
+	if cap(p.BeaconBlockRoot) == 0 {
+		p.BeaconBlockRoot = make([]byte, 0, len(buf[0:32]))
+	}
+	p.BeaconBlockRoot = append(p.BeaconBlockRoot, buf[0:32]...)
+
+	// Field (1) 'Slot'
+	p.Slot = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(ssz.UnmarshallUint64(buf[32:40]))
+
+	// Field (2) 'PayloadStatus'
+	p.PayloadStatus = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus(ssz.UnmarshallUint64(buf[40:48]))
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the PayloadAttestationData object
+func (p *PayloadAttestationData) SizeSSZ() (size int) {
+	size = 48
+	return
+}
+
+// HashTreeRoot ssz hashes the PayloadAttestationData object
+func (p *PayloadAttestationData) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(p)
+}
+
+// HashTreeRootWith ssz hashes the PayloadAttestationData object with a hasher
+func (p *PayloadAttestationData) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'BeaconBlockRoot'
+	if size := len(p.BeaconBlockRoot); size != 32 {
+		err = ssz.ErrBytesLengthFn("--.BeaconBlockRoot", size, 32)
+		return
+	}
+	hh.PutBytes(p.BeaconBlockRoot)
+
+	// Field (1) 'Slot'
+	hh.PutUint64(uint64(p.Slot))
+
+	// Field (2) 'PayloadStatus'
+	hh.PutUint64(uint64(p.PayloadStatus))
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
+
+// MarshalSSZ ssz marshals the PayloadAttestation object
+func (p *PayloadAttestation) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(p)
+}
+
+// MarshalSSZTo ssz marshals the PayloadAttestation object to a target array
+func (p *PayloadAttestation) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'AggregationBits'
+	if size := len(p.AggregationBits); size != 64 {
+		err = ssz.ErrBytesLengthFn("--.AggregationBits", size, 64)
+		return
+	}
+	dst = append(dst, p.AggregationBits...)
+
+	// Field (1) 'Data'
+	if p.Data == nil {
+		p.Data = new(PayloadAttestationData)
+	}
+	if dst, err = p.Data.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'Signature'
+	if size := len(p.Signature); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.Signature", size, 96)
+		return
+	}
+	dst = append(dst, p.Signature...)
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the PayloadAttestation object
+func (p *PayloadAttestation) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 208 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'AggregationBits'
+	if cap(p.AggregationBits) == 0 {
+		p.AggregationBits = make([]byte, 0, len(buf[0:64]))
+	}
+	p.AggregationBits = append(p.AggregationBits, buf[0:64]...)
+
+	// Field (1) 'Data'
+	if p.Data == nil {
+		p.Data = new(PayloadAttestationData)
+	}
+	if err = p.Data.UnmarshalSSZ(buf[64:112]); err != nil {
+		return err
+	}
+
+	// Field (2) 'Signature'
+	if cap(p.Signature) == 0 {
+		p.Signature = make([]byte, 0, len(buf[112:208]))
+	}
+	p.Signature = append(p.Signature, buf[112:208]...)
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the PayloadAttestation object
+func (p *PayloadAttestation) SizeSSZ() (size int) {
+	size = 208
+	return
+}
+
+// HashTreeRoot ssz hashes the PayloadAttestation object
+func (p *PayloadAttestation) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(p)
+}
+
+// HashTreeRootWith ssz hashes the PayloadAttestation object with a hasher
+func (p *PayloadAttestation) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'AggregationBits'
+	if size := len(p.AggregationBits); size != 64 {
+		err = ssz.ErrBytesLengthFn("--.AggregationBits", size, 64)
+		return
+	}
+	hh.PutBytes(p.AggregationBits)
+
+	// Field (1) 'Data'
+	if err = p.Data.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'Signature'
+	if size := len(p.Signature); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.Signature", size, 96)
+		return
+	}
+	hh.PutBytes(p.Signature)
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
+
+// MarshalSSZ ssz marshals the PayloadAttestationMessage object
+func (p *PayloadAttestationMessage) MarshalSSZ() ([]byte, error) {
+	return ssz.MarshalSSZ(p)
+}
+
+// MarshalSSZTo ssz marshals the PayloadAttestationMessage object to a target array
+func (p *PayloadAttestationMessage) MarshalSSZTo(buf []byte) (dst []byte, err error) {
+	dst = buf
+
+	// Field (0) 'ValidatorIndex'
+	dst = ssz.MarshalUint64(dst, uint64(p.ValidatorIndex))
+
+	// Field (1) 'Data'
+	if p.Data == nil {
+		p.Data = new(PayloadAttestationData)
+	}
+	if dst, err = p.Data.MarshalSSZTo(dst); err != nil {
+		return
+	}
+
+	// Field (2) 'Signature'
+	if size := len(p.Signature); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.Signature", size, 96)
+		return
+	}
+	dst = append(dst, p.Signature...)
+
+	return
+}
+
+// UnmarshalSSZ ssz unmarshals the PayloadAttestationMessage object
+func (p *PayloadAttestationMessage) UnmarshalSSZ(buf []byte) error {
+	var err error
+	size := uint64(len(buf))
+	if size != 152 {
+		return ssz.ErrSize
+	}
+
+	// Field (0) 'ValidatorIndex'
+	p.ValidatorIndex = github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex(ssz.UnmarshallUint64(buf[0:8]))
+
+	// Field (1) 'Data'
+	if p.Data == nil {
+		p.Data = new(PayloadAttestationData)
+	}
+	if err = p.Data.UnmarshalSSZ(buf[8:56]); err != nil {
+		return err
+	}
+
+	// Field (2) 'Signature'
+	if cap(p.Signature) == 0 {
+		p.Signature = make([]byte, 0, len(buf[56:152]))
+	}
+	p.Signature = append(p.Signature, buf[56:152]...)
+
+	return err
+}
+
+// SizeSSZ returns the ssz encoded size in bytes for the PayloadAttestationMessage object
+func (p *PayloadAttestationMessage) SizeSSZ() (size int) {
+	size = 152
+	return
+}
+
+// HashTreeRoot ssz hashes the PayloadAttestationMessage object
+func (p *PayloadAttestationMessage) HashTreeRoot() ([32]byte, error) {
+	return ssz.HashWithDefaultHasher(p)
+}
+
+// HashTreeRootWith ssz hashes the PayloadAttestationMessage object with a hasher
+func (p *PayloadAttestationMessage) HashTreeRootWith(hh *ssz.Hasher) (err error) {
+	indx := hh.Index()
+
+	// Field (0) 'ValidatorIndex'
+	hh.PutUint64(uint64(p.ValidatorIndex))
+
+	// Field (1) 'Data'
+	if err = p.Data.HashTreeRootWith(hh); err != nil {
+		return
+	}
+
+	// Field (2) 'Signature'
+	if size := len(p.Signature); size != 96 {
+		err = ssz.ErrBytesLengthFn("--.Signature", size, 96)
+		return
+	}
+	hh.PutBytes(p.Signature)
+
+	if ssz.EnableVectorizedHTR {
+		hh.MerkleizeVectorizedHTR(indx)
+	} else {
+		hh.Merkleize(indx)
+	}
+	return
+}
+
 // MarshalSSZ ssz marshals the DepositSnapshot object
 func (d *DepositSnapshot) MarshalSSZ() ([]byte, error) {
 	return ssz.MarshalSSZ(d)
diff --git a/proto/prysm/v1alpha1/payload_attestation.pb.go b/proto/prysm/v1alpha1/payload_attestation.pb.go
new file mode 100755
index 000000000000..1d62c2ea7ace
--- /dev/null
+++ b/proto/prysm/v1alpha1/payload_attestation.pb.go
@@ -0,0 +1,376 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.31.0
+// 	protoc        v4.25.1
+// source: proto/prysm/v1alpha1/payload_attestation.proto
+
+package eth
+
+import (
+	reflect "reflect"
+	sync "sync"
+
+	github_com_prysmaticlabs_go_bitfield "github.com/prysmaticlabs/go-bitfield"
+	github_com_prysmaticlabs_prysm_v5_consensus_types_primitives "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	_ "github.com/prysmaticlabs/prysm/v5/proto/eth/ext"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type PayloadAttestationData struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	BeaconBlockRoot []byte                                                                 `protobuf:"bytes,1,opt,name=beacon_block_root,json=beaconBlockRoot,proto3" json:"beacon_block_root,omitempty" ssz-size:"32"`
+	Slot            github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot      `protobuf:"varint,2,opt,name=slot,proto3" json:"slot,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"`
+	PayloadStatus   github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus `protobuf:"varint,3,opt,name=payload_status,json=payloadStatus,proto3" json:"payload_status,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.PTCStatus"`
+}
+
+func (x *PayloadAttestationData) Reset() {
+	*x = PayloadAttestationData{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PayloadAttestationData) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PayloadAttestationData) ProtoMessage() {}
+
+func (x *PayloadAttestationData) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use PayloadAttestationData.ProtoReflect.Descriptor instead.
+func (*PayloadAttestationData) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *PayloadAttestationData) GetBeaconBlockRoot() []byte {
+	if x != nil {
+		return x.BeaconBlockRoot
+	}
+	return nil
+}
+
+func (x *PayloadAttestationData) GetSlot() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot {
+	if x != nil {
+		return x.Slot
+	}
+	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot(0)
+}
+
+func (x *PayloadAttestationData) GetPayloadStatus() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus {
+	if x != nil {
+		return x.PayloadStatus
+	}
+	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.PTCStatus(0)
+}
+
+type PayloadAttestation struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	AggregationBits github_com_prysmaticlabs_go_bitfield.Bitvector512 `protobuf:"bytes,1,opt,name=aggregation_bits,json=aggregationBits,proto3" json:"aggregation_bits,omitempty" cast-type:"github.com/prysmaticlabs/go-bitfield.Bitvector512" ssz-size:"64"`
+	Data            *PayloadAttestationData                           `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
+	Signature       []byte                                            `protobuf:"bytes,3,opt,name=signature,proto3" json:"signature,omitempty" ssz-size:"96"`
+}
+
+func (x *PayloadAttestation) Reset() {
+	*x = PayloadAttestation{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PayloadAttestation) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PayloadAttestation) ProtoMessage() {}
+
+func (x *PayloadAttestation) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[1]
+	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 PayloadAttestation.ProtoReflect.Descriptor instead.
+func (*PayloadAttestation) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *PayloadAttestation) GetAggregationBits() github_com_prysmaticlabs_go_bitfield.Bitvector512 {
+	if x != nil {
+		return x.AggregationBits
+	}
+	return github_com_prysmaticlabs_go_bitfield.Bitvector512(nil)
+}
+
+func (x *PayloadAttestation) GetData() *PayloadAttestationData {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
+func (x *PayloadAttestation) GetSignature() []byte {
+	if x != nil {
+		return x.Signature
+	}
+	return nil
+}
+
+type PayloadAttestationMessage struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ValidatorIndex github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex `protobuf:"varint,1,opt,name=validator_index,json=validatorIndex,proto3" json:"validator_index,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"`
+	Data           *PayloadAttestationData                                                     `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
+	Signature      []byte                                                                      `protobuf:"bytes,3,opt,name=signature,proto3" json:"signature,omitempty" ssz-size:"96"`
+}
+
+func (x *PayloadAttestationMessage) Reset() {
+	*x = PayloadAttestationMessage{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PayloadAttestationMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PayloadAttestationMessage) ProtoMessage() {}
+
+func (x *PayloadAttestationMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[2]
+	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 PayloadAttestationMessage.ProtoReflect.Descriptor instead.
+func (*PayloadAttestationMessage) Descriptor() ([]byte, []int) {
+	return file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *PayloadAttestationMessage) GetValidatorIndex() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex {
+	if x != nil {
+		return x.ValidatorIndex
+	}
+	return github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.ValidatorIndex(0)
+}
+
+func (x *PayloadAttestationMessage) GetData() *PayloadAttestationData {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
+func (x *PayloadAttestationMessage) GetSignature() []byte {
+	if x != nil {
+		return x.Signature
+	}
+	return nil
+}
+
+var File_proto_prysm_v1alpha1_payload_attestation_proto protoreflect.FileDescriptor
+
+var file_proto_prysm_v1alpha1_payload_attestation_proto_rawDesc = []byte{
+	0x0a, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x70, 0x72, 0x79, 0x73, 0x6d, 0x2f, 0x76, 0x31,
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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 (
+	file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescOnce sync.Once
+	file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescData = file_proto_prysm_v1alpha1_payload_attestation_proto_rawDesc
+)
+
+func file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescGZIP() []byte {
+	file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescOnce.Do(func() {
+		file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescData)
+	})
+	return file_proto_prysm_v1alpha1_payload_attestation_proto_rawDescData
+}
+
+var file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_proto_prysm_v1alpha1_payload_attestation_proto_goTypes = []interface{}{
+	(*PayloadAttestationData)(nil),    // 0: ethereum.eth.v1alpha1.PayloadAttestationData
+	(*PayloadAttestation)(nil),        // 1: ethereum.eth.v1alpha1.PayloadAttestation
+	(*PayloadAttestationMessage)(nil), // 2: ethereum.eth.v1alpha1.PayloadAttestationMessage
+}
+var file_proto_prysm_v1alpha1_payload_attestation_proto_depIdxs = []int32{
+	0, // 0: ethereum.eth.v1alpha1.PayloadAttestation.data:type_name -> ethereum.eth.v1alpha1.PayloadAttestationData
+	0, // 1: ethereum.eth.v1alpha1.PayloadAttestationMessage.data:type_name -> ethereum.eth.v1alpha1.PayloadAttestationData
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
+}
+
+func init() { file_proto_prysm_v1alpha1_payload_attestation_proto_init() }
+func file_proto_prysm_v1alpha1_payload_attestation_proto_init() {
+	if File_proto_prysm_v1alpha1_payload_attestation_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PayloadAttestationData); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PayloadAttestation); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PayloadAttestationMessage); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proto_prysm_v1alpha1_payload_attestation_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_proto_prysm_v1alpha1_payload_attestation_proto_goTypes,
+		DependencyIndexes: file_proto_prysm_v1alpha1_payload_attestation_proto_depIdxs,
+		MessageInfos:      file_proto_prysm_v1alpha1_payload_attestation_proto_msgTypes,
+	}.Build()
+	File_proto_prysm_v1alpha1_payload_attestation_proto = out.File
+	file_proto_prysm_v1alpha1_payload_attestation_proto_rawDesc = nil
+	file_proto_prysm_v1alpha1_payload_attestation_proto_goTypes = nil
+	file_proto_prysm_v1alpha1_payload_attestation_proto_depIdxs = nil
+}
diff --git a/proto/prysm/v1alpha1/payload_attestation.pb.gw.go b/proto/prysm/v1alpha1/payload_attestation.pb.gw.go
new file mode 100755
index 000000000000..cdd03643f0c7
--- /dev/null
+++ b/proto/prysm/v1alpha1/payload_attestation.pb.gw.go
@@ -0,0 +1,4 @@
+//go:build ignore
+// +build ignore
+
+package ignore
diff --git a/proto/prysm/v1alpha1/payload_attestation.proto b/proto/prysm/v1alpha1/payload_attestation.proto
new file mode 100644
index 000000000000..7778245688ef
--- /dev/null
+++ b/proto/prysm/v1alpha1/payload_attestation.proto
@@ -0,0 +1,43 @@
+// Copyright 2024 Prysmatic Labs.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+syntax = "proto3";
+
+package ethereum.eth.v1alpha1;
+
+import "proto/eth/ext/options.proto";
+
+option csharp_namespace = "Ethereum.Eth.v1alpha1";
+option go_package = "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1;eth";
+option java_multiple_files = true;
+option java_outer_classname = "PayloadAttestationProto";
+option java_package = "org.ethereum.eth.v1alpha1";
+option php_namespace = "Ethereum\\Eth\\v1alpha1";
+
+message PayloadAttestationData {
+    bytes beacon_block_root = 1 [(ethereum.eth.ext.ssz_size) = "32"];
+    uint64 slot 		= 2 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
+    uint64 payload_status 	= 3 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.PTCStatus"];
+}
+
+message PayloadAttestation {
+    bytes aggregation_bits          = 1 [(ethereum.eth.ext.ssz_size) = "ptc.size", (ethereum.eth.ext.cast_type) = "ptc.type"];
+    PayloadAttestationData data 	= 2;
+    bytes signature 		= 3 [(ethereum.eth.ext.ssz_size) = "96"];
+}
+
+message PayloadAttestationMessage {
+    uint64 validator_index 		= 1 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.ValidatorIndex"];
+    PayloadAttestationData data 	= 2;
+    bytes signature 		= 3 [(ethereum.eth.ext.ssz_size) = "96"];
+}
diff --git a/proto/prysm/v1alpha1/validator-client/keymanager.pb.go b/proto/prysm/v1alpha1/validator-client/keymanager.pb.go
index b6e9f1b1542a..0b92cf20f510 100755
--- a/proto/prysm/v1alpha1/validator-client/keymanager.pb.go
+++ b/proto/prysm/v1alpha1/validator-client/keymanager.pb.go
@@ -107,6 +107,7 @@ type SignRequest struct {
 	//	*SignRequest_BlockElectra
 	//	*SignRequest_BlindedBlockElectra
 	//	*SignRequest_AggregateAttestationAndProofElectra
+	//	*SignRequest_PayloadAttestationData
 	Object      isSignRequest_Object                                              `protobuf_oneof:"object"`
 	SigningSlot github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot `protobuf:"varint,6,opt,name=signing_slot,json=signingSlot,proto3" json:"signing_slot,omitempty" cast-type:"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"`
 }
@@ -311,6 +312,13 @@ func (x *SignRequest) GetAggregateAttestationAndProofElectra() *v1alpha1.Aggrega
 	return nil
 }
 
+func (x *SignRequest) GetPayloadAttestationData() *v1alpha1.PayloadAttestationData {
+	if x, ok := x.GetObject().(*SignRequest_PayloadAttestationData); ok {
+		return x.PayloadAttestationData
+	}
+	return nil
+}
+
 func (x *SignRequest) GetSigningSlot() github_com_prysmaticlabs_prysm_v5_consensus_types_primitives.Slot {
 	if x != nil {
 		return x.SigningSlot
@@ -402,6 +410,10 @@ type SignRequest_AggregateAttestationAndProofElectra struct {
 	AggregateAttestationAndProofElectra *v1alpha1.AggregateAttestationAndProofElectra `protobuf:"bytes,120,opt,name=aggregate_attestation_and_proof_electra,json=aggregateAttestationAndProofElectra,proto3,oneof"`
 }
 
+type SignRequest_PayloadAttestationData struct {
+	PayloadAttestationData *v1alpha1.PayloadAttestationData `protobuf:"bytes,121,opt,name=payload_attestation_data,json=payloadAttestationData,proto3,oneof"`
+}
+
 func (*SignRequest_Block) isSignRequest_Object() {}
 
 func (*SignRequest_AttestationData) isSignRequest_Object() {}
@@ -442,6 +454,8 @@ func (*SignRequest_BlindedBlockElectra) isSignRequest_Object() {}
 
 func (*SignRequest_AggregateAttestationAndProofElectra) isSignRequest_Object() {}
 
+func (*SignRequest_PayloadAttestationData) isSignRequest_Object() {}
+
 type SignResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -690,6 +704,9 @@ var file_proto_prysm_v1alpha1_validator_client_keymanager_proto_rawDesc = []byte
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@@ -698,7 +715,7 @@ var file_proto_prysm_v1alpha1_validator_client_keymanager_proto_rawDesc = []byte
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@@ -822,85 +839,92 @@ var file_proto_prysm_v1alpha1_validator_client_keymanager_proto_rawDesc = []byte
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 }
 
 var (
@@ -942,6 +966,7 @@ var file_proto_prysm_v1alpha1_validator_client_keymanager_proto_goTypes = []inte
 	(*v1alpha1.BeaconBlockElectra)(nil),                  // 21: ethereum.eth.v1alpha1.BeaconBlockElectra
 	(*v1alpha1.BlindedBeaconBlockElectra)(nil),           // 22: ethereum.eth.v1alpha1.BlindedBeaconBlockElectra
 	(*v1alpha1.AggregateAttestationAndProofElectra)(nil), // 23: ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra
+	(*v1alpha1.PayloadAttestationData)(nil),              // 24: ethereum.eth.v1alpha1.PayloadAttestationData
 }
 var file_proto_prysm_v1alpha1_validator_client_keymanager_proto_depIdxs = []int32{
 	7,  // 0: ethereum.validator.accounts.v2.SignRequest.block:type_name -> ethereum.eth.v1alpha1.BeaconBlock
@@ -961,16 +986,17 @@ var file_proto_prysm_v1alpha1_validator_client_keymanager_proto_depIdxs = []int3
 	21, // 14: ethereum.validator.accounts.v2.SignRequest.block_electra:type_name -> ethereum.eth.v1alpha1.BeaconBlockElectra
 	22, // 15: ethereum.validator.accounts.v2.SignRequest.blinded_block_electra:type_name -> ethereum.eth.v1alpha1.BlindedBeaconBlockElectra
 	23, // 16: ethereum.validator.accounts.v2.SignRequest.aggregate_attestation_and_proof_electra:type_name -> ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra
-	0,  // 17: ethereum.validator.accounts.v2.SignResponse.status:type_name -> ethereum.validator.accounts.v2.SignResponse.Status
-	4,  // 18: ethereum.validator.accounts.v2.ProposerOptionPayload.builder:type_name -> ethereum.validator.accounts.v2.BuilderConfig
-	6,  // 19: ethereum.validator.accounts.v2.ProposerSettingsPayload.proposer_config:type_name -> ethereum.validator.accounts.v2.ProposerSettingsPayload.ProposerConfigEntry
-	3,  // 20: ethereum.validator.accounts.v2.ProposerSettingsPayload.default_config:type_name -> ethereum.validator.accounts.v2.ProposerOptionPayload
-	3,  // 21: ethereum.validator.accounts.v2.ProposerSettingsPayload.ProposerConfigEntry.value:type_name -> ethereum.validator.accounts.v2.ProposerOptionPayload
-	22, // [22:22] is the sub-list for method output_type
-	22, // [22:22] is the sub-list for method input_type
-	22, // [22:22] is the sub-list for extension type_name
-	22, // [22:22] is the sub-list for extension extendee
-	0,  // [0:22] is the sub-list for field type_name
+	24, // 17: ethereum.validator.accounts.v2.SignRequest.payload_attestation_data:type_name -> ethereum.eth.v1alpha1.PayloadAttestationData
+	0,  // 18: ethereum.validator.accounts.v2.SignResponse.status:type_name -> ethereum.validator.accounts.v2.SignResponse.Status
+	4,  // 19: ethereum.validator.accounts.v2.ProposerOptionPayload.builder:type_name -> ethereum.validator.accounts.v2.BuilderConfig
+	6,  // 20: ethereum.validator.accounts.v2.ProposerSettingsPayload.proposer_config:type_name -> ethereum.validator.accounts.v2.ProposerSettingsPayload.ProposerConfigEntry
+	3,  // 21: ethereum.validator.accounts.v2.ProposerSettingsPayload.default_config:type_name -> ethereum.validator.accounts.v2.ProposerOptionPayload
+	3,  // 22: ethereum.validator.accounts.v2.ProposerSettingsPayload.ProposerConfigEntry.value:type_name -> ethereum.validator.accounts.v2.ProposerOptionPayload
+	23, // [23:23] is the sub-list for method output_type
+	23, // [23:23] is the sub-list for method input_type
+	23, // [23:23] is the sub-list for extension type_name
+	23, // [23:23] is the sub-list for extension extendee
+	0,  // [0:23] is the sub-list for field type_name
 }
 
 func init() { file_proto_prysm_v1alpha1_validator_client_keymanager_proto_init() }
@@ -1061,6 +1087,7 @@ func file_proto_prysm_v1alpha1_validator_client_keymanager_proto_init() {
 		(*SignRequest_BlockElectra)(nil),
 		(*SignRequest_BlindedBlockElectra)(nil),
 		(*SignRequest_AggregateAttestationAndProofElectra)(nil),
+		(*SignRequest_PayloadAttestationData)(nil),
 	}
 	file_proto_prysm_v1alpha1_validator_client_keymanager_proto_msgTypes[2].OneofWrappers = []interface{}{}
 	type x struct{}
diff --git a/proto/prysm/v1alpha1/validator-client/keymanager.pb.gw.go b/proto/prysm/v1alpha1/validator-client/keymanager.pb.gw.go
new file mode 100755
index 000000000000..cdd03643f0c7
--- /dev/null
+++ b/proto/prysm/v1alpha1/validator-client/keymanager.pb.gw.go
@@ -0,0 +1,4 @@
+//go:build ignore
+// +build ignore
+
+package ignore
diff --git a/proto/prysm/v1alpha1/validator-client/keymanager.proto b/proto/prysm/v1alpha1/validator-client/keymanager.proto
index 81769612a17c..bdc309e24e06 100644
--- a/proto/prysm/v1alpha1/validator-client/keymanager.proto
+++ b/proto/prysm/v1alpha1/validator-client/keymanager.proto
@@ -3,6 +3,7 @@ package ethereum.validator.accounts.v2;
 
 import "proto/eth/ext/options.proto";
 import "proto/prysm/v1alpha1/attestation.proto";
+import "proto/prysm/v1alpha1/payload_attestation.proto";
 import "proto/prysm/v1alpha1/beacon_block.proto";
 import "proto/prysm/v1alpha1/beacon_state.proto";
 import "proto/prysm/v1alpha1/sync_committee.proto";
@@ -65,6 +66,9 @@ message SignRequest {
         ethereum.eth.v1alpha1.BeaconBlockElectra block_electra = 118;
         ethereum.eth.v1alpha1.BlindedBeaconBlockElectra blinded_block_electra = 119;
         ethereum.eth.v1alpha1.AggregateAttestationAndProofElectra aggregate_attestation_and_proof_electra = 120;
+
+        // ePBS objects.
+        ethereum.eth.v1alpha1.PayloadAttestationData payload_attestation_data = 121;
     }
     reserved 4, 5; // Reserving old, deleted fields.
     uint64 signing_slot = 6 [(ethereum.eth.ext.cast_type) = "github.com/prysmaticlabs/prysm/v5/consensus-types/primitives.Slot"];
diff --git a/testing/util/BUILD.bazel b/testing/util/BUILD.bazel
index 16154398cf7e..cf5757eee759 100644
--- a/testing/util/BUILD.bazel
+++ b/testing/util/BUILD.bazel
@@ -23,6 +23,7 @@ go_library(
         "lightclient.go",
         "logging.go",
         "merge.go",
+        "payload_attestation.go",
         "state.go",
         "sync_aggregate.go",
         "sync_committee.go",
diff --git a/testing/util/payload_attestation.go b/testing/util/payload_attestation.go
new file mode 100644
index 000000000000..a66a4d1e5a7b
--- /dev/null
+++ b/testing/util/payload_attestation.go
@@ -0,0 +1,45 @@
+package util
+
+import (
+	"crypto/rand"
+	"math/big"
+	"testing"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+)
+
+// GenerateRandomPayloadAttestationData generates a random PayloadAttestationData for testing purposes.
+func GenerateRandomPayloadAttestationData(t *testing.T) *ethpb.PayloadAttestationData {
+	// Generate a random BeaconBlockRoot
+	randomBytes := make([]byte, fieldparams.RootLength)
+	_, err := rand.Read(randomBytes)
+	if err != nil {
+		t.Fatalf("Failed to generate random BeaconBlockRoot: %v", err)
+	}
+
+	// Generate a random Slot value
+	randomSlot, err := rand.Int(rand.Reader, big.NewInt(10000))
+	if err != nil {
+		t.Fatalf("Failed to generate random Slot: %v", err)
+	}
+
+	payloadStatuses := []primitives.PTCStatus{
+		primitives.PAYLOAD_ABSENT,
+		primitives.PAYLOAD_PRESENT,
+		primitives.PAYLOAD_WITHHELD,
+	}
+	// Select a random PayloadStatus
+	index, err := rand.Int(rand.Reader, big.NewInt(int64(len(payloadStatuses))))
+	if err != nil {
+		t.Fatalf("Failed to select random PayloadStatus: %v", err)
+	}
+	randomPayloadStatus := payloadStatuses[index.Int64()]
+
+	return &ethpb.PayloadAttestationData{
+		BeaconBlockRoot: randomBytes,
+		Slot:            primitives.Slot(randomSlot.Uint64()),
+		PayloadStatus:   randomPayloadStatus,
+	}
+}
diff --git a/validator/client/BUILD.bazel b/validator/client/BUILD.bazel
index e873a131b3fe..0549340c1532 100644
--- a/validator/client/BUILD.bazel
+++ b/validator/client/BUILD.bazel
@@ -9,6 +9,7 @@ go_library(
         "log.go",
         "metrics.go",
         "multiple_endpoints_grpc_resolver.go",
+        "payload_attestation.go",
         "propose.go",
         "registration.go",
         "runner.go",
@@ -105,6 +106,7 @@ go_test(
         "attest_test.go",
         "key_reload_test.go",
         "metrics_test.go",
+        "payload_attestation_test.go",
         "propose_test.go",
         "registration_test.go",
         "runner_test.go",
diff --git a/validator/client/payload_attestation.go b/validator/client/payload_attestation.go
new file mode 100644
index 000000000000..3b405227dfd4
--- /dev/null
+++ b/validator/client/payload_attestation.go
@@ -0,0 +1,49 @@
+package client
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	validatorpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1/validator-client"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
+)
+
+func (v *validator) signPayloadAttestation(ctx context.Context, p *ethpb.PayloadAttestationData, pubKey [fieldparams.BLSPubkeyLength]byte) ([]byte, error) {
+	// Get domain data
+	epoch := slots.ToEpoch(p.Slot)
+	domain, err := v.domainData(ctx, epoch, params.BeaconConfig().DomainPTCAttester[:])
+	if err != nil {
+		return nil, errors.Wrap(err, domainDataErr)
+	}
+	if domain == nil {
+		return nil, errors.New(domainDataErr)
+	}
+
+	// Compute signing root
+	signingRoot, err := signing.ComputeSigningRoot(p, domain.SignatureDomain)
+	if err != nil {
+		return nil, errors.Wrap(err, signingRootErr)
+	}
+
+	// Create signature request
+	signReq := &validatorpb.SignRequest{
+		PublicKey:       pubKey[:],
+		SigningRoot:     signingRoot[:],
+		SignatureDomain: domain.SignatureDomain,
+		Object:          &validatorpb.SignRequest_PayloadAttestationData{PayloadAttestationData: p},
+		SigningSlot:     p.Slot,
+	}
+
+	// Sign the payload attestation data
+	sig, err := v.keyManager.Sign(ctx, signReq)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not sign payload attestation")
+	}
+
+	// Marshal the signature into bytes
+	return sig.Marshal(), nil
+}
diff --git a/validator/client/payload_attestation_test.go b/validator/client/payload_attestation_test.go
new file mode 100644
index 000000000000..6c2f356404f5
--- /dev/null
+++ b/validator/client/payload_attestation_test.go
@@ -0,0 +1,51 @@
+package client
+
+import (
+	"context"
+	"testing"
+
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/signing"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v5/crypto/bls"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/util"
+	"go.uber.org/mock/gomock"
+)
+
+func Test_validator_signPayloadAttestation(t *testing.T) {
+	v, m, vk, finish := setup(t, false)
+	defer finish()
+
+	// Define constants and mock expectations
+	e := primitives.Epoch(1000)
+	m.validatorClient.EXPECT().
+		DomainData(gomock.Any(), // ctx
+			&ethpb.DomainRequest{
+				Epoch:  e,
+				Domain: params.BeaconConfig().DomainPTCAttester[:],
+			}). // epoch
+		Return(&ethpb.DomainResponse{
+			SignatureDomain: bytesutil.PadTo([]byte("signatureDomain"), 32),
+		}, nil)
+
+	// Generate random payload attestation data
+	pa := util.GenerateRandomPayloadAttestationData(t)
+	pa.Slot = primitives.Slot(e) * params.BeaconConfig().SlotsPerEpoch // Verify that go mock EXPECT() gets the correct epoch.
+
+	// Perform the signature operation
+	ctx := context.Background()
+	sig, err := v.signPayloadAttestation(ctx, pa, [48]byte(vk.PublicKey().Marshal()))
+	require.NoError(t, err)
+
+	// Verify the signature
+	pb, err := bls.PublicKeyFromBytes(vk.PublicKey().Marshal())
+	require.NoError(t, err)
+	signature, err := bls.SignatureFromBytes(sig)
+	require.NoError(t, err)
+	sr, err := signing.ComputeSigningRoot(pa, bytesutil.PadTo([]byte("signatureDomain"), 32))
+	require.NoError(t, err)
+	require.Equal(t, true, signature.Verify(pb, sr[:]))
+}