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# CXErrorCodeRequestTransactionError.Code

Error codes for the CallKit error domain.

```
enum Code
```

## Topics

### Constants

[`CXErrorCodeRequestTransactionErrorUnknown`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/unknown)

An unknown error occurred.

[`CXErrorCodeRequestTransactionErrorUnentitled`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/unentitled)

The app isn’t entitled to perform the actions in the requested transaction.

[`CXErrorCodeRequestTransactionErrorUnknownCallProvider`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/unknownCallProvider)

The controller couldn’t find a call provider to perform the actions in the requested transaction.

[`CXErrorCodeRequestTransactionErrorEmptyTransaction`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/emptyTransaction)

The requested transaction contains no actions.

[`CXErrorCodeRequestTransactionErrorUnknownCallUUID`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/unknownCallUUID)

The requested transaction contains call actions that reference an unknown UUID.

[`CXErrorCodeRequestTransactionErrorCallUUIDAlreadyExists`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/callUUIDAlreadyExists)

The requested transaction contains call actions that reference a UUID that already exists.

[`CXErrorCodeRequestTransactionErrorInvalidAction`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/invalidAction)

The requested transaction contains an invalid action.

[`CXErrorCodeRequestTransactionErrorMaximumCallGroupsReached`](/documentation/CallKit/CXErrorCodeRequestTransactionError-swift.struct/Code/maximumCallGroupsReached)

The requested transaction contains actions that, if performed, would exceed the maximum number of call groups for the provider.

## Relationships

### Conforms To

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

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

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

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

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

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

---

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