Checking Out with the Payment Request API: A Practical Introduction to the HTML5 Payment Request API using Real-world Examples

Appendix: API Reference

API Inter faces

Interface	Purpose
MerchantValidationEvent	This enables a merchant to validate themselves as being allowed to use a particular payment handler, such as Apple Pay.
PaymentAddress	An object that contains address information, such as billing and shipping addresses.
PaymentMethodChangeEvent	This describes the paymentmethodchange event which is fired by some payment handlers, if a user changes their chosen payment instrument, such as switching from Apple Pay to using a store card.
PaymentRequest	This is the primary access point for the API, and lets web-enabled content and applications accept payments from customers/visitors.
PaymentRequestEvent	This event is sent to a payment handler when a PaymentRequest has been made. ...