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# configurationData

Additional configuration information for the token instance.

```
var configurationData: Data? { get set }
```

## Discussion

[`configurationData`](/documentation/CryptoTokenKit/TKToken/Configuration-swift.class/configurationData) can provide token-implementation-specific additional data, which the app that hosts the token driver extension and configures the token provides. The system doesn’t interpret this data in any way.

For example, the network-based hardware security module (HSM) can store encoded target network addresses, access credentials, or the list of identities the HSM contains.

---

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