添加获取托管小程序支付证书的接口

src/Wx3rd/Lib/EntrustedInterface.php

@@ -16,6 +16,7 @@ use Swoft\Core\ResultInterface;
  * The interface of store service
  *
  * @method ResultInterface deferGetEntrustedData(int $storeId, array $fields = [])
+ * @method ResultInterface deferGetWxpayCerts(int $storeId, $mchid)
  */
 interface EntrustedInterface
 {
@@ -28,4 +29,12 @@ interface EntrustedInterface
      */
     public function getEntrustedData(int $storeId, array $fields = []);
     
+    /**
+     * 根据店铺id和商户平台id获取对应的支付证书
+     * 
+     * @param int $storeId
+     * @param string $mchid
+     * @return array
+     */
+    public function getWxpayCerts(int $storeId, $mchid);
 }
\ No newline at end of file