For Banca sella purchases, you need an active and valid Bancasella account. Once you enter the Bancasella account, select '*Tecnica': A screen will appear where you can enter the IP addresses that are authorized to request Gest-pay payments. Enter the IP addresses as shown here:
In the next section, enter the requested data: payment confirmation email (this should be the main email of your store), declined payment email (this should be the main email of your store), URL for successful payments (a 'thanks for the order' page should be set), URL for declined payments (a page with an alert should be set in order to inform the user that the payment has failed), and a server to server URL (set here: https://www.storeden.com/ipn/gestpay.php) Inside the control panel configuration window, enter the Gest-Pay code provided in the format GESPAYXXXXX format, where XXXXX is the number of your Gestpay account. That's it, your gateway is now set up.