diff --git a/pkg/service/a_test.go b/pkg/service/a_test.go
new file mode 100644
index 000000000..fbbddaee8
--- /dev/null
+++ b/pkg/service/a_test.go
@@ -0,0 +1,56 @@
+package service
+
+import (
+	"crypto/tls"
+	"net"
+	"testing"
+	"time"
+)
+
+func TestName1(t *testing.T) {
+
+	tls.Client(&testConn{}, &tls.Config{}).Handshake()
+
+	time.Sleep(time.Hour)
+}
+
+type testConn struct {
+}
+
+func (testConn) Read(b []byte) (n int, err error) {
+	panic("implement me")
+}
+
+func (testConn) Write(b []byte) (n int, err error) {
+	panic("implement me")
+}
+
+func (testConn) Close() error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (testConn) LocalAddr() net.Addr {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (testConn) RemoteAddr() net.Addr {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (testConn) SetDeadline(t time.Time) error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (testConn) SetReadDeadline(t time.Time) error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (testConn) SetWriteDeadline(t time.Time) error {
+	//TODO implement me
+	panic("implement me")
+}
diff --git a/pkg/service/registry.go b/pkg/service/registry.go
new file mode 100644
index 000000000..38a4575ac
--- /dev/null
+++ b/pkg/service/registry.go
@@ -0,0 +1,67 @@
+package service
+
+import (
+	"context"
+	"fmt"
+
+	"google.golang.org/grpc"
+)
+
+type Conn interface {
+	GetConns(ctx context.Context, serviceName string, opts ...grpc.DialOption) ([]grpc.ClientConnInterface, error) //1
+	GetConn(ctx context.Context, serviceName string, opts ...grpc.DialOption) (grpc.ClientConnInterface, error)    //2
+	GetSelfConnTarget() string                                                                                     //3
+	AddOption(opts ...grpc.DialOption)                                                                             //4
+	CloseConn(conn *grpc.ClientConn)                                                                               //5
+	// do not use this method for call rpc
+}
+type SvcDiscoveryRegistry interface {
+	Conn
+	Register(serviceName, host string, port int, opts ...grpc.DialOption) error //6
+	UnRegister() error                                                          //7
+	Close()
+	GetUserIdHashGatewayHost(ctx context.Context, userId string) (string, error) //
+}
+
+var _ SvcDiscoveryRegistry = (*DiscoveryRegistry)(nil)
+
+type DiscoveryRegistry struct {
+}
+
+func (x *DiscoveryRegistry) RegisterService(desc *grpc.ServiceDesc, impl any) {
+	fmt.Println("RegisterService", desc, impl)
+}
+
+func (x *DiscoveryRegistry) GetConns(ctx context.Context, serviceName string, opts ...grpc.DialOption) ([]grpc.ClientConnInterface, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (x *DiscoveryRegistry) GetConn(ctx context.Context, serviceName string, opts ...grpc.DialOption) (grpc.ClientConnInterface, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (x *DiscoveryRegistry) GetSelfConnTarget() string {
+	return ""
+}
+
+func (x *DiscoveryRegistry) AddOption(opts ...grpc.DialOption) {}
+
+func (x *DiscoveryRegistry) CloseConn(conn *grpc.ClientConn) {
+	_ = conn.Close()
+}
+
+func (x *DiscoveryRegistry) Register(serviceName, host string, port int, opts ...grpc.DialOption) error {
+	return nil
+}
+
+func (x *DiscoveryRegistry) UnRegister() error {
+	return nil
+}
+
+func (x *DiscoveryRegistry) Close() {}
+
+func (x *DiscoveryRegistry) GetUserIdHashGatewayHost(ctx context.Context, userId string) (string, error) {
+	return "", nil
+}
diff --git a/pkg/service/service.go b/pkg/service/service.go
new file mode 100644
index 000000000..183aa4b9c
--- /dev/null
+++ b/pkg/service/service.go
@@ -0,0 +1,14 @@
+package service
+
+import (
+	"fmt"
+
+	"google.golang.org/grpc"
+)
+
+type GrpcServer struct {
+}
+
+func (x *GrpcServer) RegisterService(desc *grpc.ServiceDesc, impl any) {
+	fmt.Println("RegisterService", desc, impl)
+}