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For IPS Assist server to accept a request for the payment authorization, the enterprise should send the following parameters:
- Merchant_ID – the enterprise identifier in IPS Assist;
- OrderNumber – order number in the enterprise payment system corresponding to a given payment;
- OrderAmount – purchase price.
This is the minimum set of payment parameters that is sent by the merchant, when redirecting a customer to IPS Assist server, after which the customer enters his/her personal data (name, address, e-mail, phone number etc.) and payment means data on IPS Assist authorized payments.