# provider(_:execute:) Called when a transaction is executed by a call controller. ``` optional func provider(_ provider: CXProvider, execute transaction: CXTransaction) -> Bool ``` ## Parameters `provider` The telephony provider. `transaction` Contains the upcoming actions. ## Return Value if the `transaction` was handled; otherwise . ## Discussion Most delegates should not need to provide an implementation for this method. However, a delegate can implement this method to customize how transactions are handled. This method returns to indicate that the custom implementation handled the transaction and returns to have the provider execute the transaction normally—as if the delegate did not implement this method. For example, given a transaction consisting of a [`CXSetHeldCallAction`](/documentation/CallKit/CXSetHeldCallAction) object and a [`CXSetGroupCallAction`](/documentation/CallKit/CXSetGroupCallAction) object, the delegate may override this method to inject a 30 second wait and play hold music to the caller. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)