The details read-only property of the PaymentResponse interface returns a JSON-serializable object that provides a payment method specific message used by the merchant to process the transaction and determine a successful funds transfer.

This data is returned by the payment app that satisfies the payment request. Developers need to consult whomever controls the URL for the expected shape of the details object.

The following example extracts the details from the PaymentResponse object to the promise returned from PaymentRequest.show(). In a real-world implementation this data would then be sent to a payment server.

payment.show().then((paymentResponse) => {
  const paymentData = {
    // payment method string
    method: paymentResponse.methodName,
    // payment details as you requested
    details: paymentResponse.details,
    // shipping address information
    address: toDict(paymentResponse.shippingAddress),
  };
  // Send information to the server
});