> ## Documentation Index
> Fetch the complete documentation index at: https://docs.seasonlabs.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Flutter SDK types

> Verification models and storage interfaces exported by the Flutter SDK.

## VerificationType

```dart theme={null}
enum VerificationType {
  email,
  phone;

  String get wireValue => name;
}
```

Use `VerificationType.email` with an email address. Use
`VerificationType.phone` with an E.164 phone number.

## VerificationChallenge

Returned by `startVerification()` and `resendVerification()`.

```dart theme={null}
class VerificationChallenge {
  final String challengeId;
  final String maskedIdentifier;
  final String expiresAt;
}
```

| Field              | Meaning                                              |
| ------------------ | ---------------------------------------------------- |
| `challengeId`      | Opaque ID used to confirm or resend the challenge    |
| `maskedIdentifier` | Safe email address or phone number to show in the UI |
| `expiresAt`        | Challenge expiry returned by Era                     |

## VerificationStatus

Returned by `getVerification()`.

```dart theme={null}
class VerificationStatus {
  final String? eraEndUserId;
}
```

`eraEndUserId` is an opaque continuity ID. Do not use it to authorize access.

## VerificationConfirmation

Returned by `confirmVerification()`.

```dart theme={null}
class VerificationConfirmation {
  final bool verified = true;
  final String eraEndUserId;
}
```

A successful confirmation proves control of the email address or phone number.
It does not sign the user in to your application.

## EraFlutterStorage

Implement this interface to replace the default `SharedPreferencesAsync`
visitor storage.

```dart theme={null}
abstract interface class EraFlutterStorage {
  Future<String?> getString(String key);
  Future<void> setString(String key, String value);
  Future<void> remove(String key);
}
```

The SDK stores only the visitor ID. Challenge IDs, verification codes, and Era
end-user IDs remain the responsibility of your UI.