Creating a PaymentGateway Interface

Create a credit card token

Map<String, TransactionResult> generateToken(Map<String, TransactionParameter> mapOfTransactionParameterById,PaymentGatewayParameter paymentGatewayParameter);

Process a payment charge

Map<String, TransactionResult> chargeTransaction(Map<String, TransactionParameter> mapOfTransactionParameterById,PaymentGatewayParameter paymentGatewayParameter);

Void a payment

Map<String, TransactionResult> voidTransaction(Map<String, TransactionParameter> mapOfTransactionParameterById,PaymentGatewayParameter paymentGatewayParameter);

Authorize a payment

Map<String, TransactionResult> authorizeTransaction(Map<String, TransactionParameter> mapOfTransactionParameterById,PaymentGatewayParameter paymentGatewayParameter);

Refund a payment

Map<String, TransactionResult> generateToken(Map<String, TransactionParameter> mapOfTransactionParameterById,PaymentGatewayParameter paymentGatewayParameter);

So, if you want your gateway package to process a chargeTransaction sent from Salesforce Billing, the package must implement chargeTransaction within a PaymentGatewayAPI class. Let’s see how this configuration looks in a sample CyberSource implementation.

1global class CyberSourceAPI implements blng.PaymentGateWay
2{
3    global static Map<String, blng.TransactionResult> generateToken(Map<String, blng.TransactionParameter> mapOfTransactionParameterById) 
4    {
5        return service().generateToken(mapOfTransactionParameterById);
6    }
7
8    global static Map<String, blng.TransactionResult> authorizeTransaction(Map<String, blng.TransactionParameter> mapOfTransactionParameterById) 
9    {
10        return service().authorizeTransaction(mapOfTransactionParameterById);
11    }
12     
13    global static Map<String, blng.TransactionResult> chargeTransaction(Map<String, blng.TransactionParameter> mapOfTransactionParameterById) 
14    {
15        return service().chargeTransaction(mapOfTransactionParameterById);
16    }
17  
18    global static Map<String, blng.TransactionResult> voidTransaction(Map<String, blng.TransactionParameter> mapOfTransactionParameterById) 
19    {
20        return service().voidTransaction(mapOfTransactionParameterById);
21    }
22
23    global static Map<String, blng.TransactionResult> refundTransaction(Map<String, blng.TransactionParameter> mapOfTransactionParameterById) 
24    {
25        return service().refundTransaction(mapOfTransactionParameterById);
26    }
27}