# Required

> Calculate and uploaded content hashes to the Accelerator. Require Accelerator-provided hashes for download validation.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor](/engine/6000.5/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
Required = 3
```

### Remarks

Use this mode if you want Unity to to require content hashes for all downloaded artifacts and validate them, as well as calculate hashes for uploaded artifacts.