How can I confirm which user has completed the payment for WeChat payment?

Scan the QR code to get the QR code link and the prepaid information. However, after the payment is complete, the value not corresponding to the previous value submitted to yy_url is used to identify the user who paid the order (the openid was not obtained at the beginning, but only submitted... scan the QR code to get the QR code link and the prepaid information. However, after the payment is complete, the value not corresponding to the previous value submitted to yy_url is used to identify the user who paid the order (the openid was not obtained at the beginning, but the product information was submitted and the QR code was obtained ). The current idea is to add user-related information in notify_url. I don't know if this is the correct method.
In addition, it is difficult to achieve automatic jump in front-end payment.

How did you do it? I feel that the document is unclear.

Reply content:

Scan the QR code to get the QR code link and the prepaid information. However, after the payment is complete, the value not corresponding to the previous value submitted to yy_url is used to identify the user who paid the order (the openid was not obtained at the beginning, but the product information was submitted and the QR code was obtained ). The current idea is to add user-related information in notify_url. I don't know if this is the correct method.
In addition, it is difficult to achieve automatic jump in front-end payment.

How did you do it? I feel that the document is unclear.

The order information for each successful payment will be sent to yy_url. For details, refer:

{    "appid":"wx345f3830c28971f4",    "bank_type":"CFT",    "cash_fee":"1",    "fee_type":"CNY",    "is_subscribe":"Y",    "mch_id":"1241642202",    "nonce_str":"fTbkMTXgMmnvTaO1",    "openid":"oWY-5jjLjo7pYUK86JPpwvcnF2Js",    "out_trade_no":"124164220220150803161536",    "result_code":"SUCCESS",    "return_code":"SUCCESS",    "sign":"4B8948BD3E831394C956B5DFA8AAEB1E",    "time_end":"20150803161547",    "total_fee":"1",    "trade_type":"JSAPI",    "transaction_id":"1005130236201508030539058581"}

Out_trade_no is your order ID. You only need to update the order status in your application.

Reference: https://github.com/thenbsp/wechat/blob/master/example/payment-notify.php

Find a solution.
The original merchant system generates an out_trade_no, which will be passed back when the payment is completed and the Merchant system is notified. Therefore, the payer can be determined by using this unique id. In addition, an attach field is provided to pass custom information and return it when the payment is completed.