Pay with QR Code (Desktop Website Browser) - Alipay HK

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

2.1 Obtain the string representation of the QR code and the fallback URL

When a shopper selects to pay with Alipay HK on their desktop browser, call the Confirm a Payment Intent API API to get:

• a string representation of the QR code.
• a fallback URL pointing to the Alipay HK page.

POST /api/v1/pa/payment_intents/{id}/confirm

You will get a response similar to the following.

2.2. Present the QR code to the shopper or redirect the shopper to the Alipay HK page

You can render the QR code image with the next_action.qrcode returned in the confirm Payment Intent response and present it to the shopper. Shoppers will complete payment after scanning the QR code with their Alipay HK mobile app.

There are publicly available libraries for different programming languages to render a QR code image from its string representation. For example, if you use JavaScript, you may use qrcode to facilitate the conversion. Firstly, get a Base64-encoded image string with the qrcode library:

Then place the image string into the src field of the img element.

In case the QR code cannot be displayed, you should redirect the shopper to the Alipay HK page with the next_action.url returned in the confirm Payment Intent response. Shoppers will be able to continue the payment by scanning the QR code rendered by Alipay HK on that page.

Once generated, the QR code and the URL will expire in 10 minutes. Confirming the Payment Intent again (with Alipay HK or any other payment methods) will void both the QR code and the URL.

To get the payment result, we suggest you poll the status of the Payment Intent via the Retrieve a Payment Intent API API.

GET /api/v1/pa/payment_intents/{id}

• If you directly rendered and presented the QR code to the shopper, you should start polling the status immediately.
• If you redirected the shopper to the Alipay HK page, you may start polling the Payment Intent status after the shopper is redirected back to your website (i.e. the return_url passed when creating the Payment Intent)

In addition, Airwallex will notify you of the payment result asynchronously via the webhooks. Please refer to the webhook documentation to set up your webhook accordingly. Although subscribing to webhook events is optional, it is recommended to subscribe to the payment_intent.succeeded webhook which indicates that the shopper has paid the order.