I want to use subscriptions as a business model (https://developers.facebook.com/docs/payments/subscriptions/) but for onetime payment (Upgrading from lite to full version). The problem is that the metadata“fbpayment:billing_period” in fbpayment:subscription object takes "1 month" as default while the user in my app need to pay one time only to upgrade his version . Also the subscription dialog shows the price of subscription per month which is not real in my case. My aim for using subscriptions is to use Graph API for querying the subscription status and know who is already subscriber to give him access for specific materials . The regular payment follow in this tutorial: https://developers.facebook.com/docs/howtos/payments/paymentflow, doesn't tell how to retrieval these records .
My question is that how to use subscriptions for onetime payment ?