- more interface and const added.

platformapi/dadaapi/callback.go

@@ -40,6 +40,13 @@ var (
 	FailedResponse  = &CallbackResponse{Code: ResponseHttpCodeGeneralErr}
 )
 
+func Err2CallbackResponse(err error, data string) *CallbackResponse {
+	if err == nil {
+		return SuccessResponse
+	}
+	return FailedResponse
+}
+
 func (a *API) signCallbackParams(mapData map[string]interface{}) string {
 	values := make([]string, 0)
 	for _, k := range []string{"client_id", "order_id", "update_time"} {