The general scheme of the operation
The general scheme of interaction between merchant and Internet Payment System Assist (IPS Assist) is shown on the picture:
The buyer creates the order on the pages of the merchant's web-shop. The new order number, the payment amount and the currency are assigned to order in the enterprise's system. The buyer is being redirected to the payment pages of IPS Assist with necessary payment parameters after pressing the «Buy» button.
The Order with unique number (billnumber) and passed parameters is created in IPS Assist after receiving the authorization request. Personal data (the order parameters) can be provided within the request or prompted on the IPS Assist payment pages.
The buyer choices the way of payment (bankcard, electronic wallet ...). This creates the operation in IPS Assist. The first operation is a payment operation. The buyer provides the payment details and presses «Charge» button. The payment amount and currency are defined depending of provided value of the original amount, the original currency of the order, and the merchant and the processing settings.