We are developing an app that allows merchants to sign up with us via OAuth and customers to purchase items from merchants using our app. We want to include a variable app fee, as described in the Payment API’s Create Payment endpoint, but we want to pass the fee along to the customer, ensuring that merchants receive their full payment, no matter the amount of the app fee. We would also like to be able to calculate this amount prior to payment processing to allow the customer the knowledge of how much they are being charged.
Is this possible? Currently, it appears that app fees are taken out of the merchant’s payment, thus reducing how much they receive on a given order.
Thanks in advance.