退款

wchar_t* __stdcall NL_refund(wchar_t* param);
char*    __stdcall  NL_refundA(char* param);
char*    __stdcall  NL_refundSyncA(char* param);

NL_refund 这是一个异步接口，宽字符版本，只完成一次退款操作，返回结果，没有对支付未知等情况做查询操作。需要客户端自己结合自己的业务逻辑来使用。
NL_refundA 这是一个窄字符版本，功能同上
NL_refundSyncA 这是一个同步的窄字符版本，针对支付未知等情况作了查询操作，轮询时间间隔，次数可以在配置文件里面配置。完成后才会返回结果。

输入参数

{
    "organizationNo":"xxxx",
    "merchantId":"xxxx",
    "terminalId":"xxxx",
    "operId":"xxxx",
    "devKey":"xxxx",
    "merchantTradeSN":"xxx",
    "platformOrderNo":"xxxx",
    "amount":"xxxx",
    "merchantName":"xxx",
    "batchNo":"xxx",
    "voucherNo":"xxx",
}

输出参数

{
    "retCode":xx,
    "retMsg":"success",
    "merchantTradeSN":"xxx",
    "platformSerialNo":"xxxx",
    "refundAmount":"1",
    "paymentAmount":"1",
    "orderAmount":"1",
    "orderTitle":"xxx",
    "userOrderNo":"xxx",
    "discountComment":"xxx",
    "attachment":"xxx",
}