The buyer validates the shopping cart.

1. The mobile application initializes a payment request via the merchant server.

2. The merchant server sends a payment request to the gateway.

3. The gateway generates a payment URL and returns it to the mobile application.

4. The merchant server sends a payment URL to the mobile application.

5. The mobile application opens the payment page in a webview.

6. The buyer enters his or her card details and clicks Validate.

7. The gateway proceeds to payment, then transmits the payment notification to the merchant server.

8. The merchant server analyzes the payment result.

9. The buyer is automatically redirected to the merchant application.