code: protected function createBackData(array $data)
      {
          // 将金额处理为元
          $amount = bcdiv($data['payment_amount'], 100, 2);
  
          $retData = [
              'is_success'    => 'T',
              'response'  => [
                  'trans_no'   => $data['partner_trade_no'],// 商户单号
                  'transaction_id'  => $data['detail_id'],// 付款单号
                  'status'  => strtolower($data['status']),// 转账状态
                  'reason'    => $data['reason'],// 失败原因
                  'openid'   => $data['openid'],
                  'payee_name'   => $data['transfer_name'],// 收款用户姓名
                  'amount'   => $amount,
                  'pay_date'   => $data['transfer_time'],
                  'desc'   => $data['desc'],// 付款描述
                  'channel' => Config::WX_TRANSFER,
              ],
          ];
  
          return $retData;
      }
docs: 返回数据给客户端
  @param array $data
  @return array
  @author helei