diff --git a/p2p/stream/protocols/sync/message/compose.go b/p2p/stream/protocols/sync/message/compose.go
index e24f73837..44a9ff55a 100644
--- a/p2p/stream/protocols/sync/message/compose.go
+++ b/p2p/stream/protocols/sync/message/compose.go
@@ -112,36 +112,38 @@ func MakeGetBlockHashesResponse(rid uint64, hs []common.Hash) *Response {
 }
 
 // MakeGetBlocksByNumResponseMessage makes the GetBlocksByNumResponse of Message type
-func MakeGetBlocksByNumResponseMessage(rid uint64, blocksBytes [][]byte) *Message {
-	resp := MakeGetBlocksByNumResponse(rid, blocksBytes)
+func MakeGetBlocksByNumResponseMessage(rid uint64, blocksBytes, sigs [][]byte) *Message {
+	resp := MakeGetBlocksByNumResponse(rid, blocksBytes, sigs)
 	return makeMessageFromResponse(resp)
 }
 
 // MakeGetBlocksByNumResponseMessage make the GetBlocksByNumResponse of Response type
-func MakeGetBlocksByNumResponse(rid uint64, blocksBytes [][]byte) *Response {
+func MakeGetBlocksByNumResponse(rid uint64, blocksBytes, sigs [][]byte) *Response {
 	return &Response{
 		ReqId: rid,
 		Response: &Response_GetBlocksByNumResponse{
 			GetBlocksByNumResponse: &GetBlocksByNumResponse{
 				BlocksBytes: blocksBytes,
+				CommitSig:   sigs,
 			},
 		},
 	}
 }
 
 // MakeGetBlocksByHashesResponseMessage makes the GetBlocksByHashesResponse of Message type
-func MakeGetBlocksByHashesResponseMessage(rid uint64, blocksBytes [][]byte) *Message {
-	resp := MakeGetBlocksByHashesResponse(rid, blocksBytes)
+func MakeGetBlocksByHashesResponseMessage(rid uint64, blocksBytes, sigs [][]byte) *Message {
+	resp := MakeGetBlocksByHashesResponse(rid, blocksBytes, sigs)
 	return makeMessageFromResponse(resp)
 }
 
 // MakeGetBlocksByHashesResponse make the GetBlocksByHashesResponse of Response type
-func MakeGetBlocksByHashesResponse(rid uint64, blocksBytes [][]byte) *Response {
+func MakeGetBlocksByHashesResponse(rid uint64, blocksBytes [][]byte, sigs [][]byte) *Response {
 	return &Response{
 		ReqId: rid,
 		Response: &Response_GetBlocksByHashesResponse{
 			GetBlocksByHashesResponse: &GetBlocksByHashesResponse{
 				BlocksBytes: blocksBytes,
+				CommitSig:   sigs,
 			},
 		},
 	}
diff --git a/p2p/stream/protocols/sync/message/msg.pb.go b/p2p/stream/protocols/sync/message/msg.pb.go
index e1362fdcb..d6dbdcf82 100644
--- a/p2p/stream/protocols/sync/message/msg.pb.go
+++ b/p2p/stream/protocols/sync/message/msg.pb.go
@@ -752,6 +752,7 @@ type GetBlocksByNumResponse struct {
 	unknownFields protoimpl.UnknownFields
 
 	BlocksBytes [][]byte `protobuf:"bytes,1,rep,name=blocks_bytes,json=blocksBytes,proto3" json:"blocks_bytes,omitempty"`
+	CommitSig   [][]byte `protobuf:"bytes,2,rep,name=commit_sig,json=commitSig,proto3" json:"commit_sig,omitempty"`
 }
 
 func (x *GetBlocksByNumResponse) Reset() {
@@ -793,12 +794,20 @@ func (x *GetBlocksByNumResponse) GetBlocksBytes() [][]byte {
 	return nil
 }
 
+func (x *GetBlocksByNumResponse) GetCommitSig() [][]byte {
+	if x != nil {
+		return x.CommitSig
+	}
+	return nil
+}
+
 type GetBlocksByHashesResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
 	BlocksBytes [][]byte `protobuf:"bytes,1,rep,name=blocks_bytes,json=blocksBytes,proto3" json:"blocks_bytes,omitempty"`
+	CommitSig   [][]byte `protobuf:"bytes,2,rep,name=commit_sig,json=commitSig,proto3" json:"commit_sig,omitempty"`
 }
 
 func (x *GetBlocksByHashesResponse) Reset() {
@@ -840,6 +849,13 @@ func (x *GetBlocksByHashesResponse) GetBlocksBytes() [][]byte {
 	return nil
 }
 
+func (x *GetBlocksByHashesResponse) GetCommitSig() [][]byte {
+	if x != nil {
+		return x.CommitSig
+	}
+	return nil
+}
+
 type GetEpochStateResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1015,22 +1031,25 @@ var file_msg_proto_rawDesc = []byte{
 	0x62, 0x65, 0x72, 0x22, 0x30, 0x0a, 0x16, 0x47, 0x65, 0x74, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x48,
 	0x61, 0x73, 0x68, 0x65, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x16, 0x0a,
 	0x06, 0x68, 0x61, 0x73, 0x68, 0x65, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x06, 0x68,
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 	0x6b, 0x73, 0x42, 0x79, 0x4e, 0x75, 0x6d, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12,
 	0x21, 0x0a, 0x0c, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x73, 0x5f, 0x62, 0x79, 0x74, 0x65, 0x73, 0x18,
 	0x01, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x0b, 0x62, 0x6c, 0x6f, 0x63, 0x6b, 0x73, 0x42, 0x79, 0x74,
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+	0x0c, 0x52, 0x0a, 0x73, 0x68, 0x61, 0x72, 0x64, 0x53, 0x74, 0x61, 0x74, 0x65, 0x42, 0x09, 0x5a,
+	0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/p2p/stream/protocols/sync/message/msg.proto b/p2p/stream/protocols/sync/message/msg.proto
index 90b5edf8f..78ee12f5e 100644
--- a/p2p/stream/protocols/sync/message/msg.proto
+++ b/p2p/stream/protocols/sync/message/msg.proto
@@ -65,10 +65,12 @@ message GetBlockHashesResponse {
 
 message GetBlocksByNumResponse {
   repeated bytes blocks_bytes = 1;
+  repeated bytes commit_sig = 2;
 }
 
 message GetBlocksByHashesResponse {
   repeated bytes blocks_bytes = 1;
+  repeated bytes commit_sig = 2;
 }
 
 message GetEpochStateResponse {