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path: root/testing/web-platform/tests/payment-handler/app-change-payment-method.js
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self.addEventListener('canmakepayment', (event) => {
  event.respondWith(true);
});

async function responder(event) {
  const methodName = event.methodData[0].supportedMethods;
  if (!event.changePaymentMethod) {
    return {
      methodName,
      details: {
        changePaymentMethodReturned:
          'The changePaymentMethod() method is not implemented.',
      },
    };
  }
  let changePaymentMethodReturned;
  try {
    const response = await event.changePaymentMethod(methodName, {
      country: 'US',
    });
    changePaymentMethodReturned = response;
  } catch (err) {
    changePaymentMethodReturned = err.message;
  }
  return {methodName, details: {changePaymentMethodReturned}};
}

self.addEventListener('paymentrequest', (event) => {
  event.respondWith(responder(event));
});