---
title: "ASAuthorizationPublicKeyCredentialLargeBlobAssertionOutput.OperationResult.read(data:)"
framework: authenticationservices
role: symbol
role_heading: Case
path: "authenticationservices/asauthorizationpublickeycredentiallargeblobassertionoutput-swift.struct/operationresult/read(data:)"
---

# ASAuthorizationPublicKeyCredentialLargeBlobAssertionOutput.OperationResult.read(data:)

A result that represents data the system reads from the blob.

## Declaration

```swift
case read(data: Data?)
```

## Parameters

- `data`: The data the system reads from the blob, if the read succeeds.

## See Also

### Results

- [ASAuthorizationPublicKeyCredentialLargeBlobAssertionOutput.OperationResult.write(success:)](authenticationservices/asauthorizationpublickeycredentiallargeblobassertionoutput-swift.struct/operationresult/write(success:).md)