code: protected function retData(array $ret)
      {
          $ret['total_fee'] = bcdiv($ret['total_fee'], 100, 2);
          $ret['cash_fee'] = bcdiv($ret['cash_fee'], 100, 2);
  
          if ($this->config->returnRaw) {
              return $ret;
          }
  
          return $ret;
      }
docs: 返回的数据
  @param array $ret
  @return array