Integration of Recurring
Step 1 : Tokenization
The first time must perform web-to-web.Refer to Payment request .
Merchants generate a HTML form that redirects users to Gkash Unified Payment page for the user to ented their credit card details.
Step 2 : Receive epkey through callbackurl
A server-to-server HTTP payment status notification will respond to the merchant with the epkey
Step 3 : Payment with epkey (Recurring)
Merchant can now use the epkey to perform host-to-host(server-to-server).Refer to Payment request (Host-to-host)
Step 4 : Direct Response
A direct response Payment response(server-to-server) will include epkey as well for merchant to do the next recurring payment.