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Mobile App

Accept WeChat Pay on your mobile app on your shopper’s Android or iOS phone. You can choose to integrate Airwallex mobile SDK that supports multiple payment methods, or build the integration by yourself using WeChat Pay mobile SDKs.

Wechat - mobile app

Step 1. Initialize a payment Intent

Create a PaymentIntent object with a request_id, amount, currency and a merchant_order_id from your backend server.

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Step 2. Get available payment methods

To be able to display WeChat Pay as a payment option on your checkout page, you need to get available payment methods from Airwallex API.

When the PaymentIntent is created, send a GET request with parameters country_code, transaction_currency, transaction_mode to API endpoint /api/v1/pa/config/payment_method_types to query for a list of available payment method based on the information provided. The response will also contain the required fields and necessary resources of each payment method for you to display them on your page.

Request:

Response: Render payment methods in items to show all available payment methods to the shopper at checkout page.

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Note for available payment methods:

Alternatively, you can maintain available payment methods and corresponding resources locally on your server if you do not want to use this API endpoint. However, we highly recommend you get available payment methods dynamically from this API to avoid any trouble when payment method information or resources get updated.

Step 3. Accepting payments

When a customer selects to pay with WeChat Pay in a mobile app, you can call the following API endpoints to SDK data in the response that can be used to call WeChat mobile SDK.

  • Obtain required SDK data to process payment

Request:

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Response:

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  • Pass the data to WeChat Pay SDK

Pass what you get in the previous step to the WeChat Pay SDK. After the customer completes payment, WeChat will redirect the customer to your app and do a callback.

  • Wait for notification from Airwallex

Airwallex will notify you on the payment result asynchronously via the webhook API. Please refer to webhook documentation to set up your webhook accordingly. Although subscribing to different events is optional, it is recommended to at least subscribe to the ‘payment_intent.succeeded’ which indicates that the shopper has successfully paid for the order via WeChat.

  • Query the PaymentIntent status (Optional)

You may also query the status of a payment anytime via the PaymentIntents API

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