---
title: "onNOCChainGenerationNeeded(_:attestationInfo:onNOCChainGenerationComplete:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrnocchainissuer/onnocchaingenerationneeded(_:attestationinfo:onnocchaingenerationcomplete:)"
---

# onNOCChainGenerationNeeded(_:attestationInfo:onNOCChainGenerationComplete:)

## Declaration

```swift
func onNOCChainGenerationNeeded(_ csrInfo: CSRInfo, attestationInfo: AttestationInfo, onNOCChainGenerationComplete: @escaping MTRNOCChainGenerationCompleteHandler)
```