可以通过轮训该接口，实现支付状态检测
```javascript
WXAPI.payQuery(token, outTradeId)
```
+ token 用户登陆凭证
+ outTradeId 支付订单号，一般是`ZF`开头的那个单号
返回示例：
```json
{
"code": 0,
"data": {
"dateAdd": "2021-12-04 16:42:13",
"dateUpdate": "2021-12-04 16:42:18",
"id": 995627,
"money": 0.01,
"nextAction": "{\"type\":0,\"id\":1230398}",
"orderNo": "ZF2112040551316024",
"payGate": "WXAPP",
"payGateStr": "微信小程序",
"payGateTradeId": "4200001117202112047821714994",
"remark": "支付订单 ：1230398",
"status": 1,
"statusStr": "成功",
"uid": 1351478,
"userId": 951
},
"msg": "success"
}
```
+ status 0 未支付 1 已支付 2 失败
+ money 支付金额
+ payGateTradeId 为支付网关返回的订单号