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# CredentialSession.Event.cardEmulationTimeout

The session’s card emulation timer expired.

```
case cardEmulationTimeout
```

## Discussion

This event the session’s state back to [`CredentialSession.State.management`](/documentation/SecureElementCredential/CredentialSession/State-swift.enum/management).

When handling this event, SwiftUI applications must invalidate the [`CredentialTransaction.Configuration`](/documentation/SecureElementCredential/CredentialTransaction/Configuration) requested for this transaction.

---

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