# Glossary (/reference/glossary)



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| Term                   | Meaning                                                                                                                                                                                                                                                 |
| ---------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **tenant / project**   | you, the integrating project                                                                                                                                                                                                                            |
| **customer**           | one of *your* end users. We never learn their identity                                                                                                                                                                                                  |
| **wallet**             | a customer's holding on one chain                                                                                                                                                                                                                       |
| **address**            | the on-chain destination. A wallet can rotate addresses; retired ones stay monitored forever                                                                                                                                                            |
| **payout**             | sending funds out to an external address                                                                                                                                                                                                                |
| **ledger**             | the internal double-entry record. `available` + `locked` is what you owe a customer                                                                                                                                                                     |
| **MolnPay ID (`ref`)** | `MOLN-` and twelve hex characters on every deposit, payout, conversion, swap, cross-chain order, transfer and release. The same string the console prints on the receipt; quote it to support instead of the uuid `id`, which stays the API resource id |