When submitting a creaditcard payment, the system wants to know what type the card is.
In the JAVA SDK, the following list is provided in the MethodOfPaymentTypeEnum class:
MC, VI, AX, DC, DI, PP, JC, BL, EC, GC, BLANK
These I have been able to figure out:
Master Card: MC
American Express: AX
However, DC, DI, PP, BL, GC and BLANK remain a mystery as the DI can be fitting with both Discover and Diners.
Or can I just use BLANK as the sandbox does not seem to mind if I use a Visa card number with an AX code....