APP Flowchart

WeChat

Key Steps:

• Step 2 The merchant app initiates an order and receives parameters to invoke payment.
• Step 9 The merchant app uses the parameters received from the order to call the WeChat SDK's payment method and initiate WeChat Pay.
• Step 12 After the payment is completed, the merchant receives an asynchronous notification of the payment result. If not received, the merchant needs to actively query.

Alipay

Key Steps:

• Step 1 The merchant app initiates an order and receives parameters to invoke payment.
• Step 6 The merchant app uses the parameters received from the order to call the Alipay SDK's payment method and initiate Alipay.
• Step 9 After the payment is completed, the merchant receives an asynchronous notification of the payment result. If not received, the merchant needs to actively query.