---
title: MTRDeviceOpenCommissioningWindowHandler
framework: matter
role: symbol
role_heading: Type Alias
path: matter/mtrdeviceopencommissioningwindowhandler
---

# MTRDeviceOpenCommissioningWindowHandler

## Declaration

```swift
typealias MTRDeviceOpenCommissioningWindowHandler = (MTRSetupPayload?, (any Error)?) -> Void
```