MakeRPCFail 추가

server.go

@@ -606,6 +606,14 @@ func MakeRPCReturn(value interface{}) *RpcReturnSimple {
 	}
 }
 
+func MakeRPCFail() *RpcReturnError {
+	return &RpcReturnError{
+		err:  nil,
+		code: http.StatusInternalServerError,
+		h:    nil,
+	}
+}
+
 func MakeRPCError() *RpcReturnError {
 	pc, _, _, ok := runtime.Caller(1)
 	if ok {