public void PreparePayment(Invoice invoice)
{
PaymentGatewayFactory factory = new PaymentGatewayFactory();
this.gateway = factory.CreatePaymentGateway(invoice);
this.gateway.PaymentGranularity(invoice);
}
public void MakePayment(PaymentMethod method, Product product)
{
PaymentGatewayFactory factory = new PaymentGatewayFactory();
gateway = factory.CreatePaymentGateway(method, product);
gateway.MakePayment(product);
}