diff --git a/gointerfaces/sentry/mocks.go b/gointerfaces/sentry/mocks.go
index 9edb63f53..ae078d7c8 100644
--- a/gointerfaces/sentry/mocks.go
+++ b/gointerfaces/sentry/mocks.go
@@ -20,6 +20,9 @@ var _ SentryServer = &SentryServerMock{}
 //
 // 		// make and configure a mocked SentryServer
 // 		mockedSentryServer := &SentryServerMock{
+// 			HandShakeFunc: func(contextMoqParam context.Context, empty *emptypb.Empty) (*HandShakeReply, error) {
+// 				panic("mock out the HandShake method")
+// 			},
 // 			MessagesFunc: func(messagesRequest *MessagesRequest, sentry_MessagesServer Sentry_MessagesServer) error {
 // 				panic("mock out the Messages method")
 // 			},
@@ -60,6 +63,9 @@ var _ SentryServer = &SentryServerMock{}
 //
 // 	}
 type SentryServerMock struct {
+	// HandShakeFunc mocks the HandShake method.
+	HandShakeFunc func(contextMoqParam context.Context, empty *emptypb.Empty) (*HandShakeReply, error)
+
 	// MessagesFunc mocks the Messages method.
 	MessagesFunc func(messagesRequest *MessagesRequest, sentry_MessagesServer Sentry_MessagesServer) error
 
@@ -95,6 +101,13 @@ type SentryServerMock struct {
 
 	// calls tracks calls to the methods.
 	calls struct {
+		// HandShake holds details about calls to the HandShake method.
+		HandShake []struct {
+			// ContextMoqParam is the contextMoqParam argument value.
+			ContextMoqParam context.Context
+			// Empty is the empty argument value.
+			Empty *emptypb.Empty
+		}
 		// Messages holds details about calls to the Messages method.
 		Messages []struct {
 			// MessagesRequest is the messagesRequest argument value.
@@ -169,6 +182,7 @@ type SentryServerMock struct {
 		mustEmbedUnimplementedSentryServer []struct {
 		}
 	}
+	lockHandShake                          sync.RWMutex
 	lockMessages                           sync.RWMutex
 	lockPeerCount                          sync.RWMutex
 	lockPeerMinBlock                       sync.RWMutex
@@ -182,6 +196,45 @@ type SentryServerMock struct {
 	lockmustEmbedUnimplementedSentryServer sync.RWMutex
 }
 
+// HandShake calls HandShakeFunc.
+func (mock *SentryServerMock) HandShake(contextMoqParam context.Context, empty *emptypb.Empty) (*HandShakeReply, error) {
+	callInfo := struct {
+		ContextMoqParam context.Context
+		Empty           *emptypb.Empty
+	}{
+		ContextMoqParam: contextMoqParam,
+		Empty:           empty,
+	}
+	mock.lockHandShake.Lock()
+	mock.calls.HandShake = append(mock.calls.HandShake, callInfo)
+	mock.lockHandShake.Unlock()
+	if mock.HandShakeFunc == nil {
+		var (
+			handShakeReplyOut *HandShakeReply
+			errOut            error
+		)
+		return handShakeReplyOut, errOut
+	}
+	return mock.HandShakeFunc(contextMoqParam, empty)
+}
+
+// HandShakeCalls gets all the calls that were made to HandShake.
+// Check the length with:
+//     len(mockedSentryServer.HandShakeCalls())
+func (mock *SentryServerMock) HandShakeCalls() []struct {
+	ContextMoqParam context.Context
+	Empty           *emptypb.Empty
+} {
+	var calls []struct {
+		ContextMoqParam context.Context
+		Empty           *emptypb.Empty
+	}
+	mock.lockHandShake.RLock()
+	calls = mock.calls.HandShake
+	mock.lockHandShake.RUnlock()
+	return calls
+}
+
 // Messages calls MessagesFunc.
 func (mock *SentryServerMock) Messages(messagesRequest *MessagesRequest, sentry_MessagesServer Sentry_MessagesServer) error {
 	callInfo := struct {
@@ -606,6 +659,9 @@ var _ SentryClient = &SentryClientMock{}
 //
 // 		// make and configure a mocked SentryClient
 // 		mockedSentryClient := &SentryClientMock{
+// 			HandShakeFunc: func(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*HandShakeReply, error) {
+// 				panic("mock out the HandShake method")
+// 			},
 // 			MessagesFunc: func(ctx context.Context, in *MessagesRequest, opts ...grpc.CallOption) (Sentry_MessagesClient, error) {
 // 				panic("mock out the Messages method")
 // 			},
@@ -643,6 +699,9 @@ var _ SentryClient = &SentryClientMock{}
 //
 // 	}
 type SentryClientMock struct {
+	// HandShakeFunc mocks the HandShake method.
+	HandShakeFunc func(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*HandShakeReply, error)
+
 	// MessagesFunc mocks the Messages method.
 	MessagesFunc func(ctx context.Context, in *MessagesRequest, opts ...grpc.CallOption) (Sentry_MessagesClient, error)
 
@@ -675,6 +734,15 @@ type SentryClientMock struct {
 
 	// calls tracks calls to the methods.
 	calls struct {
+		// HandShake holds details about calls to the HandShake method.
+		HandShake []struct {
+			// Ctx is the ctx argument value.
+			Ctx context.Context
+			// In is the in argument value.
+			In *emptypb.Empty
+			// Opts is the opts argument value.
+			Opts []grpc.CallOption
+		}
 		// Messages holds details about calls to the Messages method.
 		Messages []struct {
 			// Ctx is the ctx argument value.
@@ -766,6 +834,7 @@ type SentryClientMock struct {
 			Opts []grpc.CallOption
 		}
 	}
+	lockHandShake                sync.RWMutex
 	lockMessages                 sync.RWMutex
 	lockPeerCount                sync.RWMutex
 	lockPeerMinBlock             sync.RWMutex
@@ -778,6 +847,49 @@ type SentryClientMock struct {
 	lockSetStatus                sync.RWMutex
 }
 
+// HandShake calls HandShakeFunc.
+func (mock *SentryClientMock) HandShake(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*HandShakeReply, error) {
+	callInfo := struct {
+		Ctx  context.Context
+		In   *emptypb.Empty
+		Opts []grpc.CallOption
+	}{
+		Ctx:  ctx,
+		In:   in,
+		Opts: opts,
+	}
+	mock.lockHandShake.Lock()
+	mock.calls.HandShake = append(mock.calls.HandShake, callInfo)
+	mock.lockHandShake.Unlock()
+	if mock.HandShakeFunc == nil {
+		var (
+			handShakeReplyOut *HandShakeReply
+			errOut            error
+		)
+		return handShakeReplyOut, errOut
+	}
+	return mock.HandShakeFunc(ctx, in, opts...)
+}
+
+// HandShakeCalls gets all the calls that were made to HandShake.
+// Check the length with:
+//     len(mockedSentryClient.HandShakeCalls())
+func (mock *SentryClientMock) HandShakeCalls() []struct {
+	Ctx  context.Context
+	In   *emptypb.Empty
+	Opts []grpc.CallOption
+} {
+	var calls []struct {
+		Ctx  context.Context
+		In   *emptypb.Empty
+		Opts []grpc.CallOption
+	}
+	mock.lockHandShake.RLock()
+	calls = mock.calls.HandShake
+	mock.lockHandShake.RUnlock()
+	return calls
+}
+
 // Messages calls MessagesFunc.
 func (mock *SentryClientMock) Messages(ctx context.Context, in *MessagesRequest, opts ...grpc.CallOption) (Sentry_MessagesClient, error) {
 	callInfo := struct {
diff --git a/gointerfaces/sentry/sentry.pb.go b/gointerfaces/sentry/sentry.pb.go
index f602a343c..dd1f7a7d5 100644
--- a/gointerfaces/sentry/sentry.pb.go
+++ b/gointerfaces/sentry/sentry.pb.go
@@ -290,7 +290,7 @@ func (x PeersReply_PeerEvent) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use PeersReply_PeerEvent.Descriptor instead.
 func (PeersReply_PeerEvent) EnumDescriptor() ([]byte, []int) {
-	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{15, 0}
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{16, 0}
 }
 
 type OutboundMessageData struct {
@@ -871,8 +871,6 @@ type SetStatusReply struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
-
-	Protocol Protocol `protobuf:"varint,1,opt,name=protocol,proto3,enum=sentry.Protocol" json:"protocol,omitempty"`
 }
 
 func (x *SetStatusReply) Reset() {
@@ -907,7 +905,47 @@ func (*SetStatusReply) Descriptor() ([]byte, []int) {
 	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{10}
 }
 
-func (x *SetStatusReply) GetProtocol() Protocol {
+type HandShakeReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Protocol Protocol `protobuf:"varint,1,opt,name=protocol,proto3,enum=sentry.Protocol" json:"protocol,omitempty"`
+}
+
+func (x *HandShakeReply) Reset() {
+	*x = HandShakeReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_p2psentry_sentry_proto_msgTypes[11]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HandShakeReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HandShakeReply) ProtoMessage() {}
+
+func (x *HandShakeReply) ProtoReflect() protoreflect.Message {
+	mi := &file_p2psentry_sentry_proto_msgTypes[11]
+	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 HandShakeReply.ProtoReflect.Descriptor instead.
+func (*HandShakeReply) Descriptor() ([]byte, []int) {
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{11}
+}
+
+func (x *HandShakeReply) GetProtocol() Protocol {
 	if x != nil {
 		return x.Protocol
 	}
@@ -925,7 +963,7 @@ type MessagesRequest struct {
 func (x *MessagesRequest) Reset() {
 	*x = MessagesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_p2psentry_sentry_proto_msgTypes[11]
+		mi := &file_p2psentry_sentry_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -938,7 +976,7 @@ func (x *MessagesRequest) String() string {
 func (*MessagesRequest) ProtoMessage() {}
 
 func (x *MessagesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_p2psentry_sentry_proto_msgTypes[11]
+	mi := &file_p2psentry_sentry_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -951,7 +989,7 @@ func (x *MessagesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MessagesRequest.ProtoReflect.Descriptor instead.
 func (*MessagesRequest) Descriptor() ([]byte, []int) {
-	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{11}
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *MessagesRequest) GetIds() []MessageId {
@@ -970,7 +1008,7 @@ type PeerCountRequest struct {
 func (x *PeerCountRequest) Reset() {
 	*x = PeerCountRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_p2psentry_sentry_proto_msgTypes[12]
+		mi := &file_p2psentry_sentry_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -983,7 +1021,7 @@ func (x *PeerCountRequest) String() string {
 func (*PeerCountRequest) ProtoMessage() {}
 
 func (x *PeerCountRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_p2psentry_sentry_proto_msgTypes[12]
+	mi := &file_p2psentry_sentry_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -996,7 +1034,7 @@ func (x *PeerCountRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PeerCountRequest.ProtoReflect.Descriptor instead.
 func (*PeerCountRequest) Descriptor() ([]byte, []int) {
-	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{12}
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{13}
 }
 
 type PeerCountReply struct {
@@ -1010,7 +1048,7 @@ type PeerCountReply struct {
 func (x *PeerCountReply) Reset() {
 	*x = PeerCountReply{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_p2psentry_sentry_proto_msgTypes[13]
+		mi := &file_p2psentry_sentry_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1023,7 +1061,7 @@ func (x *PeerCountReply) String() string {
 func (*PeerCountReply) ProtoMessage() {}
 
 func (x *PeerCountReply) ProtoReflect() protoreflect.Message {
-	mi := &file_p2psentry_sentry_proto_msgTypes[13]
+	mi := &file_p2psentry_sentry_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1036,7 +1074,7 @@ func (x *PeerCountReply) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PeerCountReply.ProtoReflect.Descriptor instead.
 func (*PeerCountReply) Descriptor() ([]byte, []int) {
-	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{13}
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *PeerCountReply) GetCount() uint64 {
@@ -1055,7 +1093,7 @@ type PeersRequest struct {
 func (x *PeersRequest) Reset() {
 	*x = PeersRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_p2psentry_sentry_proto_msgTypes[14]
+		mi := &file_p2psentry_sentry_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1068,7 +1106,7 @@ func (x *PeersRequest) String() string {
 func (*PeersRequest) ProtoMessage() {}
 
 func (x *PeersRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_p2psentry_sentry_proto_msgTypes[14]
+	mi := &file_p2psentry_sentry_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1081,7 +1119,7 @@ func (x *PeersRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PeersRequest.ProtoReflect.Descriptor instead.
 func (*PeersRequest) Descriptor() ([]byte, []int) {
-	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{14}
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{15}
 }
 
 type PeersReply struct {
@@ -1096,7 +1134,7 @@ type PeersReply struct {
 func (x *PeersReply) Reset() {
 	*x = PeersReply{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_p2psentry_sentry_proto_msgTypes[15]
+		mi := &file_p2psentry_sentry_proto_msgTypes[16]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1109,7 +1147,7 @@ func (x *PeersReply) String() string {
 func (*PeersReply) ProtoMessage() {}
 
 func (x *PeersReply) ProtoReflect() protoreflect.Message {
-	mi := &file_p2psentry_sentry_proto_msgTypes[15]
+	mi := &file_p2psentry_sentry_proto_msgTypes[16]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1122,7 +1160,7 @@ func (x *PeersReply) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use PeersReply.ProtoReflect.Descriptor instead.
 func (*PeersReply) Descriptor() ([]byte, []int) {
-	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{15}
+	return file_p2psentry_sentry_proto_rawDescGZIP(), []int{16}
 }
 
 func (x *PeersReply) GetPeerId() *types.H512 {
@@ -1213,123 +1251,127 @@ var file_p2psentry_sentry_proto_rawDesc = []byte{
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 }
 
 var (
@@ -1345,7 +1387,7 @@ func file_p2psentry_sentry_proto_rawDescGZIP() []byte {
 }
 
 var file_p2psentry_sentry_proto_enumTypes = make([]protoimpl.EnumInfo, 4)
-var file_p2psentry_sentry_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
+var file_p2psentry_sentry_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
 var file_p2psentry_sentry_proto_goTypes = []interface{}{
 	(MessageId)(0),                          // 0: sentry.MessageId
 	(PenaltyKind)(0),                        // 1: sentry.PenaltyKind
@@ -1362,57 +1404,60 @@ var file_p2psentry_sentry_proto_goTypes = []interface{}{
 	(*Forks)(nil),                           // 12: sentry.Forks
 	(*StatusData)(nil),                      // 13: sentry.StatusData
 	(*SetStatusReply)(nil),                  // 14: sentry.SetStatusReply
-	(*MessagesRequest)(nil),                 // 15: sentry.MessagesRequest
-	(*PeerCountRequest)(nil),                // 16: sentry.PeerCountRequest
-	(*PeerCountReply)(nil),                  // 17: sentry.PeerCountReply
-	(*PeersRequest)(nil),                    // 18: sentry.PeersRequest
-	(*PeersReply)(nil),                      // 19: sentry.PeersReply
-	(*types.H512)(nil),                      // 20: types.H512
-	(*types.H256)(nil),                      // 21: types.H256
-	(*emptypb.Empty)(nil),                   // 22: google.protobuf.Empty
+	(*HandShakeReply)(nil),                  // 15: sentry.HandShakeReply
+	(*MessagesRequest)(nil),                 // 16: sentry.MessagesRequest
+	(*PeerCountRequest)(nil),                // 17: sentry.PeerCountRequest
+	(*PeerCountReply)(nil),                  // 18: sentry.PeerCountReply
+	(*PeersRequest)(nil),                    // 19: sentry.PeersRequest
+	(*PeersReply)(nil),                      // 20: sentry.PeersReply
+	(*types.H512)(nil),                      // 21: types.H512
+	(*types.H256)(nil),                      // 22: types.H256
+	(*emptypb.Empty)(nil),                   // 23: google.protobuf.Empty
 }
 var file_p2psentry_sentry_proto_depIdxs = []int32{
 	0,  // 0: sentry.OutboundMessageData.id:type_name -> sentry.MessageId
 	4,  // 1: sentry.SendMessageByMinBlockRequest.data:type_name -> sentry.OutboundMessageData
 	4,  // 2: sentry.SendMessageByIdRequest.data:type_name -> sentry.OutboundMessageData
-	20, // 3: sentry.SendMessageByIdRequest.peer_id:type_name -> types.H512
+	21, // 3: sentry.SendMessageByIdRequest.peer_id:type_name -> types.H512
 	4,  // 4: sentry.SendMessageToRandomPeersRequest.data:type_name -> sentry.OutboundMessageData
-	20, // 5: sentry.SentPeers.peers:type_name -> types.H512
-	20, // 6: sentry.PenalizePeerRequest.peer_id:type_name -> types.H512
+	21, // 5: sentry.SentPeers.peers:type_name -> types.H512
+	21, // 6: sentry.PenalizePeerRequest.peer_id:type_name -> types.H512
 	1,  // 7: sentry.PenalizePeerRequest.penalty:type_name -> sentry.PenaltyKind
-	20, // 8: sentry.PeerMinBlockRequest.peer_id:type_name -> types.H512
+	21, // 8: sentry.PeerMinBlockRequest.peer_id:type_name -> types.H512
 	0,  // 9: sentry.InboundMessage.id:type_name -> sentry.MessageId
-	20, // 10: sentry.InboundMessage.peer_id:type_name -> types.H512
-	21, // 11: sentry.Forks.genesis:type_name -> types.H256
-	21, // 12: sentry.StatusData.total_difficulty:type_name -> types.H256
-	21, // 13: sentry.StatusData.best_hash:type_name -> types.H256
+	21, // 10: sentry.InboundMessage.peer_id:type_name -> types.H512
+	22, // 11: sentry.Forks.genesis:type_name -> types.H256
+	22, // 12: sentry.StatusData.total_difficulty:type_name -> types.H256
+	22, // 13: sentry.StatusData.best_hash:type_name -> types.H256
 	12, // 14: sentry.StatusData.fork_data:type_name -> sentry.Forks
-	2,  // 15: sentry.SetStatusReply.protocol:type_name -> sentry.Protocol
+	2,  // 15: sentry.HandShakeReply.protocol:type_name -> sentry.Protocol
 	0,  // 16: sentry.MessagesRequest.ids:type_name -> sentry.MessageId
-	20, // 17: sentry.PeersReply.peer_id:type_name -> types.H512
+	21, // 17: sentry.PeersReply.peer_id:type_name -> types.H512
 	3,  // 18: sentry.PeersReply.event:type_name -> sentry.PeersReply.PeerEvent
-	9,  // 19: sentry.Sentry.PenalizePeer:input_type -> sentry.PenalizePeerRequest
-	10, // 20: sentry.Sentry.PeerMinBlock:input_type -> sentry.PeerMinBlockRequest
-	5,  // 21: sentry.Sentry.SendMessageByMinBlock:input_type -> sentry.SendMessageByMinBlockRequest
-	6,  // 22: sentry.Sentry.SendMessageById:input_type -> sentry.SendMessageByIdRequest
-	7,  // 23: sentry.Sentry.SendMessageToRandomPeers:input_type -> sentry.SendMessageToRandomPeersRequest
-	4,  // 24: sentry.Sentry.SendMessageToAll:input_type -> sentry.OutboundMessageData
-	13, // 25: sentry.Sentry.SetStatus:input_type -> sentry.StatusData
-	15, // 26: sentry.Sentry.Messages:input_type -> sentry.MessagesRequest
-	16, // 27: sentry.Sentry.PeerCount:input_type -> sentry.PeerCountRequest
-	18, // 28: sentry.Sentry.Peers:input_type -> sentry.PeersRequest
-	22, // 29: sentry.Sentry.PenalizePeer:output_type -> google.protobuf.Empty
-	22, // 30: sentry.Sentry.PeerMinBlock:output_type -> google.protobuf.Empty
-	8,  // 31: sentry.Sentry.SendMessageByMinBlock:output_type -> sentry.SentPeers
-	8,  // 32: sentry.Sentry.SendMessageById:output_type -> sentry.SentPeers
-	8,  // 33: sentry.Sentry.SendMessageToRandomPeers:output_type -> sentry.SentPeers
-	8,  // 34: sentry.Sentry.SendMessageToAll:output_type -> sentry.SentPeers
-	14, // 35: sentry.Sentry.SetStatus:output_type -> sentry.SetStatusReply
-	11, // 36: sentry.Sentry.Messages:output_type -> sentry.InboundMessage
-	17, // 37: sentry.Sentry.PeerCount:output_type -> sentry.PeerCountReply
-	19, // 38: sentry.Sentry.Peers:output_type -> sentry.PeersReply
-	29, // [29:39] is the sub-list for method output_type
-	19, // [19:29] is the sub-list for method input_type
+	13, // 19: sentry.Sentry.SetStatus:input_type -> sentry.StatusData
+	9,  // 20: sentry.Sentry.PenalizePeer:input_type -> sentry.PenalizePeerRequest
+	10, // 21: sentry.Sentry.PeerMinBlock:input_type -> sentry.PeerMinBlockRequest
+	23, // 22: sentry.Sentry.HandShake:input_type -> google.protobuf.Empty
+	5,  // 23: sentry.Sentry.SendMessageByMinBlock:input_type -> sentry.SendMessageByMinBlockRequest
+	6,  // 24: sentry.Sentry.SendMessageById:input_type -> sentry.SendMessageByIdRequest
+	7,  // 25: sentry.Sentry.SendMessageToRandomPeers:input_type -> sentry.SendMessageToRandomPeersRequest
+	4,  // 26: sentry.Sentry.SendMessageToAll:input_type -> sentry.OutboundMessageData
+	16, // 27: sentry.Sentry.Messages:input_type -> sentry.MessagesRequest
+	17, // 28: sentry.Sentry.PeerCount:input_type -> sentry.PeerCountRequest
+	19, // 29: sentry.Sentry.Peers:input_type -> sentry.PeersRequest
+	14, // 30: sentry.Sentry.SetStatus:output_type -> sentry.SetStatusReply
+	23, // 31: sentry.Sentry.PenalizePeer:output_type -> google.protobuf.Empty
+	23, // 32: sentry.Sentry.PeerMinBlock:output_type -> google.protobuf.Empty
+	15, // 33: sentry.Sentry.HandShake:output_type -> sentry.HandShakeReply
+	8,  // 34: sentry.Sentry.SendMessageByMinBlock:output_type -> sentry.SentPeers
+	8,  // 35: sentry.Sentry.SendMessageById:output_type -> sentry.SentPeers
+	8,  // 36: sentry.Sentry.SendMessageToRandomPeers:output_type -> sentry.SentPeers
+	8,  // 37: sentry.Sentry.SendMessageToAll:output_type -> sentry.SentPeers
+	11, // 38: sentry.Sentry.Messages:output_type -> sentry.InboundMessage
+	18, // 39: sentry.Sentry.PeerCount:output_type -> sentry.PeerCountReply
+	20, // 40: sentry.Sentry.Peers:output_type -> sentry.PeersReply
+	30, // [30:41] is the sub-list for method output_type
+	19, // [19:30] is the sub-list for method input_type
 	19, // [19:19] is the sub-list for extension type_name
 	19, // [19:19] is the sub-list for extension extendee
 	0,  // [0:19] is the sub-list for field type_name
@@ -1557,7 +1602,7 @@ func file_p2psentry_sentry_proto_init() {
 			}
 		}
 		file_p2psentry_sentry_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MessagesRequest); i {
+			switch v := v.(*HandShakeReply); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1569,7 +1614,7 @@ func file_p2psentry_sentry_proto_init() {
 			}
 		}
 		file_p2psentry_sentry_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PeerCountRequest); i {
+			switch v := v.(*MessagesRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1581,7 +1626,7 @@ func file_p2psentry_sentry_proto_init() {
 			}
 		}
 		file_p2psentry_sentry_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PeerCountReply); i {
+			switch v := v.(*PeerCountRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1593,7 +1638,7 @@ func file_p2psentry_sentry_proto_init() {
 			}
 		}
 		file_p2psentry_sentry_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*PeersRequest); i {
+			switch v := v.(*PeerCountReply); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1605,6 +1650,18 @@ func file_p2psentry_sentry_proto_init() {
 			}
 		}
 		file_p2psentry_sentry_proto_msgTypes[15].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PeersRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_p2psentry_sentry_proto_msgTypes[16].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*PeersReply); i {
 			case 0:
 				return &v.state
@@ -1623,7 +1680,7 @@ func file_p2psentry_sentry_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_p2psentry_sentry_proto_rawDesc,
 			NumEnums:      4,
-			NumMessages:   16,
+			NumMessages:   17,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/gointerfaces/sentry/sentry_grpc.pb.go b/gointerfaces/sentry/sentry_grpc.pb.go
index baba40266..a603777a0 100644
--- a/gointerfaces/sentry/sentry_grpc.pb.go
+++ b/gointerfaces/sentry/sentry_grpc.pb.go
@@ -19,13 +19,17 @@ const _ = grpc.SupportPackageIsVersion7
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type SentryClient interface {
+	// SetStatus - force new ETH client state of sentry - network_id, max_block, etc...
+	SetStatus(ctx context.Context, in *StatusData, opts ...grpc.CallOption) (*SetStatusReply, error)
 	PenalizePeer(ctx context.Context, in *PenalizePeerRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	PeerMinBlock(ctx context.Context, in *PeerMinBlockRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
+	// HandShake - pre-requirement for all Send* methods - returns ETH protocol version,
+	// without knowledge of protocol - impossible encode correct P2P message
+	HandShake(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*HandShakeReply, error)
 	SendMessageByMinBlock(ctx context.Context, in *SendMessageByMinBlockRequest, opts ...grpc.CallOption) (*SentPeers, error)
 	SendMessageById(ctx context.Context, in *SendMessageByIdRequest, opts ...grpc.CallOption) (*SentPeers, error)
 	SendMessageToRandomPeers(ctx context.Context, in *SendMessageToRandomPeersRequest, opts ...grpc.CallOption) (*SentPeers, error)
 	SendMessageToAll(ctx context.Context, in *OutboundMessageData, opts ...grpc.CallOption) (*SentPeers, error)
-	SetStatus(ctx context.Context, in *StatusData, opts ...grpc.CallOption) (*SetStatusReply, error)
 	// Subscribe to receive messages.
 	// Calling multiple times with a different set of ids starts separate streams.
 	// It is possible to subscribe to the same set if ids more than once.
@@ -43,6 +47,15 @@ func NewSentryClient(cc grpc.ClientConnInterface) SentryClient {
 	return &sentryClient{cc}
 }
 
+func (c *sentryClient) SetStatus(ctx context.Context, in *StatusData, opts ...grpc.CallOption) (*SetStatusReply, error) {
+	out := new(SetStatusReply)
+	err := c.cc.Invoke(ctx, "/sentry.Sentry/SetStatus", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *sentryClient) PenalizePeer(ctx context.Context, in *PenalizePeerRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
 	out := new(emptypb.Empty)
 	err := c.cc.Invoke(ctx, "/sentry.Sentry/PenalizePeer", in, out, opts...)
@@ -61,6 +74,15 @@ func (c *sentryClient) PeerMinBlock(ctx context.Context, in *PeerMinBlockRequest
 	return out, nil
 }
 
+func (c *sentryClient) HandShake(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*HandShakeReply, error) {
+	out := new(HandShakeReply)
+	err := c.cc.Invoke(ctx, "/sentry.Sentry/HandShake", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *sentryClient) SendMessageByMinBlock(ctx context.Context, in *SendMessageByMinBlockRequest, opts ...grpc.CallOption) (*SentPeers, error) {
 	out := new(SentPeers)
 	err := c.cc.Invoke(ctx, "/sentry.Sentry/SendMessageByMinBlock", in, out, opts...)
@@ -97,15 +119,6 @@ func (c *sentryClient) SendMessageToAll(ctx context.Context, in *OutboundMessage
 	return out, nil
 }
 
-func (c *sentryClient) SetStatus(ctx context.Context, in *StatusData, opts ...grpc.CallOption) (*SetStatusReply, error) {
-	out := new(SetStatusReply)
-	err := c.cc.Invoke(ctx, "/sentry.Sentry/SetStatus", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
 func (c *sentryClient) Messages(ctx context.Context, in *MessagesRequest, opts ...grpc.CallOption) (Sentry_MessagesClient, error) {
 	stream, err := c.cc.NewStream(ctx, &Sentry_ServiceDesc.Streams[0], "/sentry.Sentry/Messages", opts...)
 	if err != nil {
@@ -183,13 +196,17 @@ func (x *sentryPeersClient) Recv() (*PeersReply, error) {
 // All implementations must embed UnimplementedSentryServer
 // for forward compatibility
 type SentryServer interface {
+	// SetStatus - force new ETH client state of sentry - network_id, max_block, etc...
+	SetStatus(context.Context, *StatusData) (*SetStatusReply, error)
 	PenalizePeer(context.Context, *PenalizePeerRequest) (*emptypb.Empty, error)
 	PeerMinBlock(context.Context, *PeerMinBlockRequest) (*emptypb.Empty, error)
+	// HandShake - pre-requirement for all Send* methods - returns ETH protocol version,
+	// without knowledge of protocol - impossible encode correct P2P message
+	HandShake(context.Context, *emptypb.Empty) (*HandShakeReply, error)
 	SendMessageByMinBlock(context.Context, *SendMessageByMinBlockRequest) (*SentPeers, error)
 	SendMessageById(context.Context, *SendMessageByIdRequest) (*SentPeers, error)
 	SendMessageToRandomPeers(context.Context, *SendMessageToRandomPeersRequest) (*SentPeers, error)
 	SendMessageToAll(context.Context, *OutboundMessageData) (*SentPeers, error)
-	SetStatus(context.Context, *StatusData) (*SetStatusReply, error)
 	// Subscribe to receive messages.
 	// Calling multiple times with a different set of ids starts separate streams.
 	// It is possible to subscribe to the same set if ids more than once.
@@ -204,12 +221,18 @@ type SentryServer interface {
 type UnimplementedSentryServer struct {
 }
 
+func (UnimplementedSentryServer) SetStatus(context.Context, *StatusData) (*SetStatusReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SetStatus not implemented")
+}
 func (UnimplementedSentryServer) PenalizePeer(context.Context, *PenalizePeerRequest) (*emptypb.Empty, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method PenalizePeer not implemented")
 }
 func (UnimplementedSentryServer) PeerMinBlock(context.Context, *PeerMinBlockRequest) (*emptypb.Empty, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method PeerMinBlock not implemented")
 }
+func (UnimplementedSentryServer) HandShake(context.Context, *emptypb.Empty) (*HandShakeReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method HandShake not implemented")
+}
 func (UnimplementedSentryServer) SendMessageByMinBlock(context.Context, *SendMessageByMinBlockRequest) (*SentPeers, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method SendMessageByMinBlock not implemented")
 }
@@ -222,9 +245,6 @@ func (UnimplementedSentryServer) SendMessageToRandomPeers(context.Context, *Send
 func (UnimplementedSentryServer) SendMessageToAll(context.Context, *OutboundMessageData) (*SentPeers, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method SendMessageToAll not implemented")
 }
-func (UnimplementedSentryServer) SetStatus(context.Context, *StatusData) (*SetStatusReply, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method SetStatus not implemented")
-}
 func (UnimplementedSentryServer) Messages(*MessagesRequest, Sentry_MessagesServer) error {
 	return status.Errorf(codes.Unimplemented, "method Messages not implemented")
 }
@@ -247,6 +267,24 @@ func RegisterSentryServer(s grpc.ServiceRegistrar, srv SentryServer) {
 	s.RegisterService(&Sentry_ServiceDesc, srv)
 }
 
+func _Sentry_SetStatus_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(StatusData)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SentryServer).SetStatus(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/sentry.Sentry/SetStatus",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SentryServer).SetStatus(ctx, req.(*StatusData))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Sentry_PenalizePeer_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(PenalizePeerRequest)
 	if err := dec(in); err != nil {
@@ -283,6 +321,24 @@ func _Sentry_PeerMinBlock_Handler(srv interface{}, ctx context.Context, dec func
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Sentry_HandShake_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(emptypb.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SentryServer).HandShake(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/sentry.Sentry/HandShake",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SentryServer).HandShake(ctx, req.(*emptypb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Sentry_SendMessageByMinBlock_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(SendMessageByMinBlockRequest)
 	if err := dec(in); err != nil {
@@ -355,24 +411,6 @@ func _Sentry_SendMessageToAll_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }
 
-func _Sentry_SetStatus_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(StatusData)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(SentryServer).SetStatus(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/sentry.Sentry/SetStatus",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(SentryServer).SetStatus(ctx, req.(*StatusData))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
 func _Sentry_Messages_Handler(srv interface{}, stream grpc.ServerStream) error {
 	m := new(MessagesRequest)
 	if err := stream.RecvMsg(m); err != nil {
@@ -440,6 +478,10 @@ var Sentry_ServiceDesc = grpc.ServiceDesc{
 	ServiceName: "sentry.Sentry",
 	HandlerType: (*SentryServer)(nil),
 	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SetStatus",
+			Handler:    _Sentry_SetStatus_Handler,
+		},
 		{
 			MethodName: "PenalizePeer",
 			Handler:    _Sentry_PenalizePeer_Handler,
@@ -448,6 +490,10 @@ var Sentry_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "PeerMinBlock",
 			Handler:    _Sentry_PeerMinBlock_Handler,
 		},
+		{
+			MethodName: "HandShake",
+			Handler:    _Sentry_HandShake_Handler,
+		},
 		{
 			MethodName: "SendMessageByMinBlock",
 			Handler:    _Sentry_SendMessageByMinBlock_Handler,
@@ -464,10 +510,6 @@ var Sentry_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "SendMessageToAll",
 			Handler:    _Sentry_SendMessageToAll_Handler,
 		},
-		{
-			MethodName: "SetStatus",
-			Handler:    _Sentry_SetStatus_Handler,
-		},
 		{
 			MethodName: "PeerCount",
 			Handler:    _Sentry_PeerCount_Handler,
diff --git a/txpool/mocks_test.go b/txpool/mocks_test.go
index afbfe311c..f683e4c7a 100644
--- a/txpool/mocks_test.go
+++ b/txpool/mocks_test.go
@@ -4,9 +4,8 @@
 package txpool
 
 import (
-	"sync"
-
 	"github.com/ledgerwatch/erigon-lib/kv"
+	"sync"
 )
 
 // Ensure, that PoolMock does implement Pool.
diff --git a/txpool/test_util.go b/txpool/test_util.go
index 37fe53ede..ec02130bb 100644
--- a/txpool/test_util.go
+++ b/txpool/test_util.go
@@ -23,6 +23,7 @@ import (
 
 	"github.com/ledgerwatch/erigon-lib/gointerfaces"
 	"github.com/ledgerwatch/erigon-lib/gointerfaces/sentry"
+	"google.golang.org/protobuf/types/known/emptypb"
 )
 
 //go:generate moq -stub -out mocks_test.go . Pool
@@ -54,7 +55,10 @@ func (ms *MockSentry) Send(req *sentry.InboundMessage) (errs []error) {
 }
 
 func (ms *MockSentry) SetStatus(context.Context, *sentry.StatusData) (*sentry.SetStatusReply, error) {
-	return &sentry.SetStatusReply{Protocol: sentry.Protocol_ETH66}, nil
+	return &sentry.SetStatusReply{}, nil
+}
+func (ms *MockSentry) HandShake(context.Context, *emptypb.Empty) (*sentry.HandShakeReply, error) {
+	return &sentry.HandShakeReply{Protocol: sentry.Protocol_ETH66}, nil
 }
 func (ms *MockSentry) Messages(req *sentry.MessagesRequest, stream sentry.Sentry_MessagesServer) error {
 	ms.lock.Lock()