code: protected function retData(array $data)
      {
          $data = parent::retData($data); // TODO: Change the autogenerated stub
  
          try {
              $ret = $this->sendReq($data);
          } catch (PayException $e) {
              throw $e;
          }
  
          if ($this->config->returnRaw) {
              $ret['channel'] = Config::ALI_CHARGE;
              return $ret;
          }
  
          return $this->createBackData($ret);
      }
docs: 请求后得到的返回数据
  @param array $data
  @return array|mixed
  @throws PayException