## Operation Status
There are several operation statuses used across `cash in` & `cash out` processes:
* `unpaid`: Initial status when a reference is created. The operation is ready to be paid.
* `paid`: Once the end customer completes a cash deposit or cash withdrawal and all required validations succeed.
* `expired`: Each generated reference has an expiration window. For cash-in, the reference expires after 3 days. For cash-out, it expires after 60 minutes, For Open References it expires based on the custom date you set during creation.
* `reversed`: If an issue occurs during processing at the physical location, the transaction is voided.