Get Payment Instrument Use this to read a card before the amount is known. This way it is easy to make a loyalty solution and to deduct the amount in case of a loyalty member. It may also speed ut the process in case contactless is used and PIN not required. Request Customer Confirmation Use this method to ask the customer a yes/no question. Request Customer DigitString Use this method to ask the customer to enter a string of digits Request To Display This method makes it possible to display a message on the terminal display. Request To Print Call this method to use the A920pro printer for printing. Set Payment Instrument SetPaymentInstrument starts a payment for supplied paymentInstrument.
