An architecture that provides a server that communicates bidirectionally with a gateway over a first communication link, over which service requests flow to the server for one or more merchants and/or consumers is disclosed. Service requests are associated with a particular merchant based on storefront...http://www.google.de/patents/US5987132?utm_source=gb-gplus-sharePatent US5987132 - System, method and article of manufacture for conditionally accepting a payment method utilizing an extensible, flexible architecture
