# commissioning(_:needsThreadCredentialsWithScanResults:error:completion:) Callback that gets called for a commissionee that supports Thread if Thread network commissioning is required and an operational dataset was not provided in MTRCommissioningParameters. ``` optional func commissioning(_ commissioning: MTRCommissioningOperation, needsThreadCredentialsWithScanResults networks: [MTRNetworkCommissioningClusterThreadInterfaceScanResultStruct]?, error: (any Error)?, completion: @escaping @Sendable (Data) -> Void) ``` ``` optional func commissioning(_ commissioning: MTRCommissioningOperation, needsThreadCredentialsWithScanResults networks: [MTRNetworkCommissioningClusterThreadInterfaceScanResultStruct]?, error: (any Error)?) async -> Data ``` ## Discussion Commissioning will pause, including in cases when the network scan failed, until the completion is invoked with the operational dataset the commissionee should use, or until commissioning is stopped. - error will be non-nil if a scan was attempted and failed. - networks will be non-nil if a scan was attempted and succeeded. - Both error and networks will be nil if no scan was performed. --- 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)