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  "title" : "CredentialSession.Event"
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# CredentialSession.Event

Events produced by a credential session, such as connectivity events and errors.

```
enum Event
```

## Topics

### Credential events

[`case credentialFinishedInstalling(credential: CredentialSession.Credential)`](/documentation/SecureElementCredential/CredentialSession/Event/credentialFinishedInstalling(credential:))

The session finished installing a credential.

[`struct Credential`](/documentation/SecureElementCredential/CredentialSession/Credential)

Information about a credential that a credential session retrieves from the Secure Element.

### Card emulation events

[`case connectivityEvent(CredentialSession.ConnectivityEvent)`](/documentation/SecureElementCredential/CredentialSession/Event/connectivityEvent(_:))

A credential received a connectivity event during card emulation.

[`struct ConnectivityEvent`](/documentation/SecureElementCredential/CredentialSession/ConnectivityEvent)

An event that a credential receives during card emulation.

### NFC field events

[`case fieldStateChanged(info: CredentialSession.NFCFieldInformation)`](/documentation/SecureElementCredential/CredentialSession/Event/fieldStateChanged(info:))

The state of the NFC RF field changed during card emulation.

[`enum NFCFieldInformation`](/documentation/SecureElementCredential/CredentialSession/NFCFieldInformation)

The state of an NFC RF field.

### Invalidation events

[`case sessionInvalidated(reason: CredentialSession.ErrorCode)`](/documentation/SecureElementCredential/CredentialSession/Event/sessionInvalidated(reason:))

The session became invalidated.

[`enum ErrorCode`](/documentation/SecureElementCredential/CredentialSession/ErrorCode)

An error encountered by a credential session.

### Timeout events

[`case cardEmulationTimeout`](/documentation/SecureElementCredential/CredentialSession/Event/cardEmulationTimeout)

The session’s card emulation timer expired.

[`case presentmentIntentAssertionTimeout`](/documentation/SecureElementCredential/CredentialSession/Event/presentmentIntentAssertionTimeout)

The session’s presentment intent assertion timed out.

## Relationships

### Conforms To

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

---

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