Domain models
This section describes the API using UML diagrams.
PaymentProvider and PaymentOption
The PaymentProvider is a place holder for Payment Service Provider PSP (such as Klarna, SwedbankPay, PayPal, etc) and the PaymentOption entity represents merchant account(s) created with the PSP in Litium.

Payment
Litium Connect Payment is the entity contains the information sent to payment service providers to initialize a payment.

Transaction
