---
title: ENGetDiagnosisKeysHandler
framework: exposurenotification
role: symbol
role_heading: Type Alias
path: exposurenotification/engetdiagnosiskeyshandler
---

# ENGetDiagnosisKeysHandler

The definition of a handler that returns diagnosis keys.

## Declaration

```swift
typealias ENGetDiagnosisKeysHandler = ([ENTemporaryExposureKey]?, (any Error)?) -> Void
```