PaymentRequest: merchantvalidation event

merchantvalidation events are delivered by the Payment Request API to a PaymentRequest object when a payment handler requires that the merchant requesting the purchase validate itself as permitted to use the payment handler.

See Merchant validation in Payment processing concepts for details on how the merchant validation process works.

Examples

In this example, an event handler is established for the merchantvalidation event. It uses the fetch() to send a request to its own server with an argument of the payment method's validation URL, obtained from the event's validationURL property. The merchant server should access the validation URL in accordance with the payment method documention. Typically, a client should not access the validation URL.

request.addEventListener("merchantvalidation", event => {
  event.complete(async () => {
    const merchantServerUrl = window.location.origin +
        '/validate?url=' + encodeURIComponent(event.validationURL);
    // get validation data, and complete validation;
    return await fetch(merchantServerUrl).then(response => response.text());
  }, false);
};

const response = await request.show();

How merchant server handles the validation depends on the server implementation and payment method documentation. The content delivered by the validation server is forwarded to the merchant server and is then returned from the fetch() call's fulfillment handler to the complete() method on the event. This response lets the payment handler know if the merchant is validated.

You can also use the onmerchantvalidation event handler property to set up the handler for this event:

request.onmerchantvalidation = event => {
  event.complete(async () => {
    const merchantServerUrl = window.location.origin +
        '/validate?url=' + encodeURIComponent(event.validationURL);
    // get validation data, and complete validation;
    return await fetch(merchantServerUrl).then(response => response.text());
  });
};

const response = await request.show();

For more information, see Merchant Validation in Payment processing concepts.

Related events

• payerdetailchange, paymentmethodchange, shippingaddresschange, and shippingoptionchange

Specifications

Browser compatibility