Substitutable Components
The solution proposed relies on IPF Core components, however the interactions between the components are abstracted into a single interface allowing you to substitute alternative components.
For example, the Payment Warehouse is accessed through a single interface, the PaymentWarehouse interface.
You could implement your own concrete class of this interface and use that.
The key interfaces are outlined below:
Payment Warehouse
The com.iconsolutions.ipf.core.warehouse.port.PaymentWarehouse found in the Maven artefact:
<dependency>
<groupId>com.iconsolutions.ipf.core.warehouse</groupId>
<artifactId>payment-warehouse-api-port</artifactId>
</dependency>