---
title: "certificateChainRequest(with:completionHandler:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusteroperationalcredentials/certificatechainrequest(with:completionhandler:)"
---

# certificateChainRequest(with:completionHandler:)

## Declaration

```swift
func certificateChainRequest(with params: MTROperationalCredentialsClusterCertificateChainRequestParams, completionHandler: @escaping @Sendable (MTROperationalCredentialsClusterCertificateChainResponseParams?, (any Error)?) -> Void)
```

```swift
func certificateChainRequest(with params: MTROperationalCredentialsClusterCertificateChainRequestParams) async throws -> MTROperationalCredentialsClusterCertificateChainResponseParams
```