Message Flow

The EFTLink Core API is a set of Java classes, but it is essential when developing a new core to also understand the underlying message protocol that is encapsulated in those classes, to keep in mind how each method call affects the connections and to be aware of the generally multi-threaded nature of the architecture.

The diagram below describes the flow of messages from the client application through EFTLink to a payment core.

Figure 3-2 Message Flow