| AdapterInterface | Payment adapter interface |
| AbstractAdapter | Payment adapter abstract class |
| Authorize | Authorize payment adapter class |
| Exception | Payment adapter exception class |
| PayLeap | PayLeap payment adapter class |
| PayPal | PayPal payment adapter class |
| TrustCommerce | TrustCommerce payment adapter class |
| UsaEpay | USAEPay payment adapter class |
