EPSCore/EPSHost

The key Interfaces that a core must use are EPSCore and EPSHost. The core implements EPSCore and so receives events (for example authorization requests) from the EFTLink framework. The EFTLink framework implements EPSHost to allow the core to access framework resources and to interact with the POS.

The current version of EPSCore is EPSCore_1_6. Earlier versions are still supported for backward compatibility, but any new core should implement the highest available version to benefit from any recent enhancements.