> ## 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.

# CrossmintOtpSendCallback

> Flutter Type Alias

**Type Alias**

Called by non-custodial signers to (re-)send an OTP to the user.

```dart theme={null}
typedef CrossmintOtpSendCallback = Future<void> Function()
```