Module provides the skeleton for integrate custom payment in Magento 1.x
In Myname_Mygateway_PaymentController
redirectAction() is triggered when someone places an order
responseAction() is triggered when your gateway sends back a response after processing the customer's payment
cancelAction() is triggered when an order is to be cancelled
In Myname_Mygateway_Model_Standard extends Mage_Payment_Model_Method_Abstract
getOrderPlaceRedirectUrl() is called to get redirecturl of your gateway.