---
title: referenceChecksum
framework: CKTool JS
role: symbol
role_heading: Instance Property
platforms: [cktool js 1.2.15+]
path: cktooljs/ckdbasset/referencechecksum
---

# referenceChecksum

The checksum of the wrapping key returned from the upload step.

## Declaration

```data
attribute string? referenceChecksum;
```