update

src/Common/Weixin/Data/BackPubChargeData.php

@@ -29,6 +29,10 @@ class BackPubChargeData extends WxBaseData
             'package' => 'prepay_id=' . $this->prepay_id,
             'signType' => 'MD5',// 签名算法，暂支持MD5
         ];
+        if (!empty($this->sub_appid)) {
+            $this->retData['sub_appid'] = $this->sub_appid;
+            $this->retData['sub_mch_id'] = $this->sub_mch_id;
+        }
     }
 
     protected function checkDataParam()

src/Common/Weixin/Data/WxBaseData.php

@@ -25,6 +25,9 @@ use Payment\Common\PayException;
  * @property string $publicKeyPem 从获取RSA加密公钥API中得到的RSA公钥并进行将PKCS#1转为PKCS#8的pem格式文件
  * @property string $tradeType   支付类型
  * @property string $terminal_id 终端设备号(门店号或收银设备ID)，默认请传"WEB"
+ * @property string $sub_appid
+ * @property string $sub_mch_id 终端设备号(门店号或收银设备ID)，默认请传"WEB"
+ *
  *
  * @package Payment\Common\Weixin\Data
  */