---
title: "deviceAttestation(_:failedForDevice:error:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrdeviceattestationdelegate/deviceattestation(_:failedfordevice:error:)"
---

# deviceAttestation(_:failedForDevice:error:)

## Declaration

```swift
optional func deviceAttestation(_ controller: MTRDeviceController, failedForDevice device: UnsafeMutableRawPointer, error: any Error)
```