Walley Checkout is hosted within your site by placing a script tag in pages in your web shop where the Checkout should be shown. The script tag will load an iframe which will guide the customer through the purchase. Once the purchase has been completed, you will be notified through a web request to an API URI of your choosing. Details about the purchase may then be acquired from the Checkout REST API.
Completed purchases may be managed by interacting with the Walley Payments API Integration. This includes activating pending invoices, making returns etc.