[Feature Request] Payment Method Auto Discounts

[Feature Request] Payment Method Auto Discounts: Currently we have the ability to apply a flat rate or percentage at the payment gateway when clients pay. I would like to have my pricing be inclusive of credit card fees, but instead have the option to present the customer with a 2-3% discount if they choose to pay with Bank Transfer. If this is not possible, maybe an option to send a credit for the 2-3% discount to be applied to the customers next invoice.