> ## Documentation Index
> Fetch the complete documentation index at: https://crossmint-devin-1787949784-wallet-docs-two-concept-model.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CrossmintOtpRejectCallback

> Flutter Type Alias

**Type Alias**

Called to cancel a pending OTP challenge, optionally with an error cause.

```dart theme={null}
typedef CrossmintOtpRejectCallback = void Function([Object? error])
```