> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-docs-add-b20-spec.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# IActivationRegistry.activate

> Generated B20 reference for activate(bytes32).

[Related concept](/base-chain/specs/upgrades/beryl/b20/specification/concepts/architecture-and-precompiles)

## Signature

```solidity theme={null}
function activate(bytes32 feature) external;
```

| Field               | Value               |
| ------------------- | ------------------- |
| Selector            | `0x59db6e85`        |
| Canonical signature | `activate(bytes32)` |

## Description

Activates `feature`. Emits `FeatureActivated`.
Dev: Reverts with `DelegateCallNotAllowed` when invoked via `DELEGATECALL` or `CALLCODE`.
Dev: Reverts with `StaticCallNotAllowed` when invoked under `STATICCALL`.
Dev: Reverts with `Unauthorized` when the caller is not the activation admin.
Dev: Reverts with `AlreadyActivated` when `feature` is already activated.
Param: feature Feature to activate.

## Access control

Callable by the ActivationRegistry admin.

## Policy interaction

No direct policy interaction.

## Example

```solidity theme={null}
IActivationRegistry(target).activate(arg0);
```

## Related

* [IActivationRegistry reference](/base-chain/specs/upgrades/beryl/b20/specification/reference/interfaces/IActivationRegistry)
* [Constants & addresses](/base-chain/specs/upgrades/beryl/b20/specification/reference/constants-and-addresses)