We are using a payment gateway in one of our mendix application. There are 3 basic step to made payment by using payment portal.
. Register your transaction request (This will give you a Transaction ID)
· Redirect buyer to Payment Portal using TransactionID received from Registration and ReturnPath (specifies the URL a buyer will be redirected back to, when the payment process is finished.)
· Collect TransactionID from the page redirected back from Payment Portal.
· Send Finalization request (Capture Payment or Reversal Payment)using the received TransactionID as parameter.