PrePayRequest

{
    "mchId": "MCH20231120001",
    "payWay": "MINI_PROGRAM",
    "channel": "WECHAT",
    "userIp": "192.168.1.100",
    "orderNo": "ORDER20231120000001",
    "orderAmt": 99.99,
    "expiredTime": "2023-11-20T18:30:00Z",
    "notifyUrl": "https://merchant.example.com/notify",
    "memo": "用户购买商品备注信息",
    "goodsName": "Apple iPhone 15 Pro",
    "appId": "wx1234567890abcdef",
    "userId": "user_openid_12345"
}