metadata parameter. These objects currently include Charges, Checkout Sessions, Payment Links, Payment Intents, Transfers, and Account Numbers.
Use metadata to store arbitrary structured data about the Fintoc objects you interact with. This data can help you map Fintoc objects to records in your system. For example, you can store a customer’s full name and the corresponding identifier from your system on a Fintoc payment intent. Fintoc does not use or modify metadata.
Limitations
metadata supports up to 50 keys. Key names can contain up to 40 characters, and values can contain up to 500 characters. Each value must be a string, boolean, or number.