xyzshop/helper/refill/api/xyz/xiaoniu/config.php

<?php
namespace refill\xiaoniu;

class config
{
    //98
    const ORDER_URL = 'http://120.78.222.188:8801/api/order/recharge';
    const QUERY_URL = 'http://120.78.222.188:8801/api/order/query';

    const MCH_ID = 'xn210709006';
    const Key = '6bfdcb765af3434b886e48fa609c6ec4';
    const NOTIFY_URL = BASE_SITE_URL . "/mobile/callback/refill_xiaoniu.php";
    const ExtHeaders = ['Content-Type:application/x-www-form-urlencoded;charset=utf-8'];
}