Method: Check for errors during checkout

Method: Process the purchase and create the charge in Amazon

Method: Retrieve the checkout URL for Amazon after authentication is complete

Method: Retrieve the return URL for Amazon after authentication on Amazon is complete

Method: Retrieve the URL to send customers too once sign-in is complete

Method: Retrieve the IPN URL for Amazon

Method: Removes the requirement for entering the billing address

Method: Given a transaction ID, generate a link to the Amazon transaction ID details

Method: Process IPN messages from Amazon

Method: Detect a refund action from EDD