diff --git a/dtmcli/msg_grpc.go b/dtmcli/msg_grpc.go
new file mode 100644
index 0000000..b8a8902
--- /dev/null
+++ b/dtmcli/msg_grpc.go
@@ -0,0 +1,49 @@
+package dtmcli
+
+// MsgGrpc reliable msg type
+type MsgGrpc struct {
+	MsgDataGrpc
+	TransBase
+}
+
+// MsgDataGrpc msg data
+type MsgDataGrpc struct {
+	TransData
+	Steps         []MsgStepGrpc `json:"steps"`
+	QueryPrepared string        `json:"query_prepared"`
+}
+
+// MsgStepGrpc struct of one step msg
+type MsgStepGrpc struct {
+	Action string `json:"action"`
+	Data   string `json:"data"`
+}
+
+// NewMsgGrpc create new msg
+func NewMsgGrpc(server string, gid string) *MsgGrpc {
+	return &MsgGrpc{
+		MsgDataGrpc: MsgDataGrpc{TransData: TransData{
+			Gid:       gid,
+			TransType: "msg",
+		}},
+		TransBase: TransBase{
+			Dtm: server,
+		},
+	}
+}
+
+// Add add a new step
+func (s *MsgGrpc) Add(action string, postData interface{}) *MsgGrpc {
+	Logf("msg %s Add %s %v", s.MsgDataGrpc.Gid, action, postData)
+	step := MsgStepGrpc{
+		Action: action,
+		Data:   MustMarshalString(postData),
+	}
+	s.Steps = append(s.Steps, step)
+	return s
+}
+
+// Submit submit the msg
+func (s *MsgGrpc) Submit() error {
+	return s.CallDtm(&s.MsgDataGrpc, "submit")
+}
diff --git a/examples/busi.pb.go b/examples/busi.pb.go
new file mode 100644
index 0000000..b431eee
--- /dev/null
+++ b/examples/busi.pb.go
@@ -0,0 +1,274 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.17.3
+// source: examples/busi.proto
+
+package examples
+
+import (
+	dtmcli "github.com/yedf/dtm/dtmcli"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+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)
+)
+
+// The request message containing the user's name.
+type BusiRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Info    *dtmcli.DtmTransInfo `protobuf:"bytes,1,opt,name=info,proto3" json:"info,omitempty"`
+	Extra   map[string]string    `protobuf:"bytes,2,rep,name=Extra,proto3" json:"Extra,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	AppData []byte               `protobuf:"bytes,3,opt,name=AppData,proto3" json:"AppData,omitempty"`
+}
+
+func (x *BusiRequest) Reset() {
+	*x = BusiRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_examples_busi_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BusiRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BusiRequest) ProtoMessage() {}
+
+func (x *BusiRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_examples_busi_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 BusiRequest.ProtoReflect.Descriptor instead.
+func (*BusiRequest) Descriptor() ([]byte, []int) {
+	return file_examples_busi_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *BusiRequest) GetInfo() *dtmcli.DtmTransInfo {
+	if x != nil {
+		return x.Info
+	}
+	return nil
+}
+
+func (x *BusiRequest) GetExtra() map[string]string {
+	if x != nil {
+		return x.Extra
+	}
+	return nil
+}
+
+func (x *BusiRequest) GetAppData() []byte {
+	if x != nil {
+		return x.AppData
+	}
+	return nil
+}
+
+// The response message containing the greetings
+type BusiReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DtmResult  string `protobuf:"bytes,1,opt,name=DtmResult,proto3" json:"DtmResult,omitempty"`
+	DtmMessage string `protobuf:"bytes,2,opt,name=DtmMessage,proto3" json:"DtmMessage,omitempty"`
+}
+
+func (x *BusiReply) Reset() {
+	*x = BusiReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_examples_busi_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BusiReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BusiReply) ProtoMessage() {}
+
+func (x *BusiReply) ProtoReflect() protoreflect.Message {
+	mi := &file_examples_busi_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 BusiReply.ProtoReflect.Descriptor instead.
+func (*BusiReply) Descriptor() ([]byte, []int) {
+	return file_examples_busi_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *BusiReply) GetDtmResult() string {
+	if x != nil {
+		return x.DtmResult
+	}
+	return ""
+}
+
+func (x *BusiReply) GetDtmMessage() string {
+	if x != nil {
+		return x.DtmMessage
+	}
+	return ""
+}
+
+var File_examples_busi_proto protoreflect.FileDescriptor
+
+var file_examples_busi_proto_rawDesc = []byte{
+	0x0a, 0x13, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x73, 0x2f, 0x62, 0x75, 0x73, 0x69, 0x2e,
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+	0x12, 0x3e, 0x0a, 0x0e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x4f, 0x75, 0x74, 0x52, 0x65, 0x76, 0x65,
+	0x72, 0x74, 0x12, 0x15, 0x2e, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x73, 0x2e, 0x42, 0x75,
+	0x73, 0x69, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x13, 0x2e, 0x65, 0x78, 0x61, 0x6d,
+	0x70, 0x6c, 0x65, 0x73, 0x2e, 0x42, 0x75, 0x73, 0x69, 0x52, 0x65, 0x70, 0x6c, 0x79, 0x22, 0x00,
+	0x42, 0x1e, 0x5a, 0x1c, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x79,
+	0x65, 0x64, 0x66, 0x2f, 0x64, 0x74, 0x6d, 0x2f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x73,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_examples_busi_proto_rawDescOnce sync.Once
+	file_examples_busi_proto_rawDescData = file_examples_busi_proto_rawDesc
+)
+
+func file_examples_busi_proto_rawDescGZIP() []byte {
+	file_examples_busi_proto_rawDescOnce.Do(func() {
+		file_examples_busi_proto_rawDescData = protoimpl.X.CompressGZIP(file_examples_busi_proto_rawDescData)
+	})
+	return file_examples_busi_proto_rawDescData
+}
+
+var file_examples_busi_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_examples_busi_proto_goTypes = []interface{}{
+	(*BusiRequest)(nil),         // 0: examples.BusiRequest
+	(*BusiReply)(nil),           // 1: examples.BusiReply
+	nil,                         // 2: examples.BusiRequest.ExtraEntry
+	(*dtmcli.DtmTransInfo)(nil), // 3: dtmcli.DtmTransInfo
+}
+var file_examples_busi_proto_depIdxs = []int32{
+	3, // 0: examples.BusiRequest.info:type_name -> dtmcli.DtmTransInfo
+	2, // 1: examples.BusiRequest.Extra:type_name -> examples.BusiRequest.ExtraEntry
+	0, // 2: examples.Busi.TransIn:input_type -> examples.BusiRequest
+	0, // 3: examples.Busi.TransOut:input_type -> examples.BusiRequest
+	0, // 4: examples.Busi.TransInRevert:input_type -> examples.BusiRequest
+	0, // 5: examples.Busi.TransOutRevert:input_type -> examples.BusiRequest
+	1, // 6: examples.Busi.TransIn:output_type -> examples.BusiReply
+	1, // 7: examples.Busi.TransOut:output_type -> examples.BusiReply
+	1, // 8: examples.Busi.TransInRevert:output_type -> examples.BusiReply
+	1, // 9: examples.Busi.TransOutRevert:output_type -> examples.BusiReply
+	6, // [6:10] is the sub-list for method output_type
+	2, // [2:6] 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_examples_busi_proto_init() }
+func file_examples_busi_proto_init() {
+	if File_examples_busi_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_examples_busi_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BusiRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_examples_busi_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BusiReply); 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_examples_busi_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_examples_busi_proto_goTypes,
+		DependencyIndexes: file_examples_busi_proto_depIdxs,
+		MessageInfos:      file_examples_busi_proto_msgTypes,
+	}.Build()
+	File_examples_busi_proto = out.File
+	file_examples_busi_proto_rawDesc = nil
+	file_examples_busi_proto_goTypes = nil
+	file_examples_busi_proto_depIdxs = nil
+}
diff --git a/examples/busi.proto b/examples/busi.proto
new file mode 100644
index 0000000..d6816b6
--- /dev/null
+++ b/examples/busi.proto
@@ -0,0 +1,27 @@
+syntax = "proto3";
+
+package examples;
+
+option go_package = "github.com/yedf/dtm/examples";
+import "dtmcli/dtmcli.proto";
+
+// The dtm service definition.
+service Busi {
+  rpc TransIn(BusiRequest) returns (BusiReply) {}
+  rpc TransOut(BusiRequest) returns (BusiReply) {}
+  rpc TransInRevert(BusiRequest) returns (BusiReply) {}
+  rpc TransOutRevert(BusiRequest) returns (BusiReply) {}
+}
+
+// The request message containing the user's name.
+message BusiRequest {
+  dtmcli.DtmTransInfo info = 1;
+  map<string, string> Extra = 2;
+  bytes AppData = 3;
+}
+
+// The response message containing the greetings
+message BusiReply {
+  string DtmResult = 1;
+  string DtmMessage = 2;
+}
\ No newline at end of file
diff --git a/examples/busi_grpc.pb.go b/examples/busi_grpc.pb.go
new file mode 100644
index 0000000..524c697
--- /dev/null
+++ b/examples/busi_grpc.pb.go
@@ -0,0 +1,209 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package examples
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// BusiClient is the client API for Busi service.
+//
+// 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 BusiClient interface {
+	TransIn(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error)
+	TransOut(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error)
+	TransInRevert(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error)
+	TransOutRevert(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error)
+}
+
+type busiClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewBusiClient(cc grpc.ClientConnInterface) BusiClient {
+	return &busiClient{cc}
+}
+
+func (c *busiClient) TransIn(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error) {
+	out := new(BusiReply)
+	err := c.cc.Invoke(ctx, "/examples.Busi/TransIn", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *busiClient) TransOut(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error) {
+	out := new(BusiReply)
+	err := c.cc.Invoke(ctx, "/examples.Busi/TransOut", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *busiClient) TransInRevert(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error) {
+	out := new(BusiReply)
+	err := c.cc.Invoke(ctx, "/examples.Busi/TransInRevert", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *busiClient) TransOutRevert(ctx context.Context, in *BusiRequest, opts ...grpc.CallOption) (*BusiReply, error) {
+	out := new(BusiReply)
+	err := c.cc.Invoke(ctx, "/examples.Busi/TransOutRevert", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// BusiServer is the server API for Busi service.
+// All implementations must embed UnimplementedBusiServer
+// for forward compatibility
+type BusiServer interface {
+	TransIn(context.Context, *BusiRequest) (*BusiReply, error)
+	TransOut(context.Context, *BusiRequest) (*BusiReply, error)
+	TransInRevert(context.Context, *BusiRequest) (*BusiReply, error)
+	TransOutRevert(context.Context, *BusiRequest) (*BusiReply, error)
+	mustEmbedUnimplementedBusiServer()
+}
+
+// UnimplementedBusiServer must be embedded to have forward compatible implementations.
+type UnimplementedBusiServer struct {
+}
+
+func (UnimplementedBusiServer) TransIn(context.Context, *BusiRequest) (*BusiReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method TransIn not implemented")
+}
+func (UnimplementedBusiServer) TransOut(context.Context, *BusiRequest) (*BusiReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method TransOut not implemented")
+}
+func (UnimplementedBusiServer) TransInRevert(context.Context, *BusiRequest) (*BusiReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method TransInRevert not implemented")
+}
+func (UnimplementedBusiServer) TransOutRevert(context.Context, *BusiRequest) (*BusiReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method TransOutRevert not implemented")
+}
+func (UnimplementedBusiServer) mustEmbedUnimplementedBusiServer() {}
+
+// UnsafeBusiServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to BusiServer will
+// result in compilation errors.
+type UnsafeBusiServer interface {
+	mustEmbedUnimplementedBusiServer()
+}
+
+func RegisterBusiServer(s grpc.ServiceRegistrar, srv BusiServer) {
+	s.RegisterService(&Busi_ServiceDesc, srv)
+}
+
+func _Busi_TransIn_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BusiRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BusiServer).TransIn(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/examples.Busi/TransIn",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BusiServer).TransIn(ctx, req.(*BusiRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Busi_TransOut_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BusiRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BusiServer).TransOut(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/examples.Busi/TransOut",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BusiServer).TransOut(ctx, req.(*BusiRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Busi_TransInRevert_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BusiRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BusiServer).TransInRevert(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/examples.Busi/TransInRevert",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BusiServer).TransInRevert(ctx, req.(*BusiRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Busi_TransOutRevert_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BusiRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BusiServer).TransOutRevert(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/examples.Busi/TransOutRevert",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BusiServer).TransOutRevert(ctx, req.(*BusiRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Busi_ServiceDesc is the grpc.ServiceDesc for Busi service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Busi_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "examples.Busi",
+	HandlerType: (*BusiServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "TransIn",
+			Handler:    _Busi_TransIn_Handler,
+		},
+		{
+			MethodName: "TransOut",
+			Handler:    _Busi_TransOut_Handler,
+		},
+		{
+			MethodName: "TransInRevert",
+			Handler:    _Busi_TransInRevert_Handler,
+		},
+		{
+			MethodName: "TransOutRevert",
+			Handler:    _Busi_TransOutRevert_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "examples/busi.proto",
+}
diff --git a/examples/main_msg_pb.go b/examples/main_msg_pb.go
new file mode 100644
index 0000000..292ef8c
--- /dev/null
+++ b/examples/main_msg_pb.go
@@ -0,0 +1,21 @@
+package examples
+
+import (
+	"context"
+
+	"github.com/gin-gonic/gin"
+	"github.com/yedf/dtm/dtmcli"
+)
+
+// MsgPbSetup 1
+func MsgPbSetup(app *gin.Engine) {
+
+}
+
+// MsgPbFireRequest 1
+func MsgPbFireRequest() string {
+	dtmcli.Logf("MsgPbFireRequest")
+	reply, err := DtmClient.Call(context.Background(), &dtmcli.DtmRequest{})
+	dtmcli.Logf("reply and err is: %v, %v", reply, err)
+	return ""
+}