Configure payment plug-ins

Define payment and refund methods; payment and refund rules; and the payment protocols (payment back-end system).

A payment method is typically associated with one payment configuration (for example, Visa has a configuration called config001, MasterCard has a configuration called config002, check has a configuration called config003, and so on).

More than one payment configuration ID can be associated with a store so that a store can use various payment method configurations.

A given payment method can be associated with a store more than once with a different payment configuration ID (for example, Visa - Gold with configuration ID configID0004 and MasterCard - Silver with configuration ID configID0005).