Own Payment Method

• Payment methods are implemented as plugins in nopCommerce.
• So actually a payment method is an ordinary plugin which implements an IPaymentMethod interface (Nop.Services.Payments namespace).
• It contains some methods which are specific only for payment methods such as ProcessPayment() or GetAdditionalHandlingFee().
• So add a new payment plugin project (class library) to solution and let's get started.

Payment processing.

• Now you need to create a class which implements IPaymentMethod interface.
• This is the class that will be doing all the actual work of communicating with your payment gateway.
• When someone creates an order either the ProcessPayment or PostProcessPayment methods of your class will be called.
• Here is how CashOnDeliveryPaymentProcessor class is defined ("Cash on delivery" payment method)