> For the complete documentation index, see [llms.txt](https://docs.caf.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.caf.io/caf-sdk/android/standalone-modules/cafsmartauth/references.md).

# References

### `CafFilterStyle`

| Field          | Description                                           |
| -------------- | ----------------------------------------------------- |
| `NATURAL`      | The original captured selfie.                         |
| `LINE_DRAWING` | A line drawing filter applied to the captured selfie. |

### `CafFaceAuthenticatorSettings`

| Field               | Description                                                                                    |
| ------------------- | ---------------------------------------------------------------------------------------------- |
| `faceAuthToken`     | Usage token associated with your CAF account                                                   |
| `useLoadingScreen`  | Boolean value to enable or disable the loading screen.                                         |
| `enableScreenshots` | Boolean value to enable or disable screen recording during face liveness verification process. |
| `filter`            | Filter style to apply to the captured selfie.                                                  |

### `CafFailure`

#### Structure

| Field     | Description             |
| --------- | ----------------------- |
| `message` | Detailed error message. |

The `CafFailure` represents various types of errors that may occur in the SDK:

| Error                | Description                                                |
| -------------------- | ---------------------------------------------------------- |
| `PermissionReason`   | Some mandatory permission is missing.                      |
| `AvailabilityReason` | CafSmartAuth is not available for use.                     |
| `NetworkReason`      | Internet connection failure.                               |
| `ServerReason`       | When a request receives a failure status code.             |
| `SecurityReason`     | The SDK cannot be started due to a security-related issue. |
| `PolicyReason`       | A policy being used is not supported by the SDK.           |

This section provides a reference to the main configurable properties and potential errors for the *CafSmartAuth* SDK on Android.


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