Establishing interaction with the payment gateway
The interaction with the payment gateway is described in the Payment Form Implementation Guide, available here: https://www.payzen.eu/support/integration-payzen/
The merchant website and the payment gateway interact by exchanging data.
To create a payment, this data is sent in an HTML form via the buyer's browser.
- automatically by means of a notification called Instant Notification URL (also called IPN), see chapter Setting up notifications,
- via the browser when the buyer clicks on the button to return to the merchant website, .