> ## 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.admin

> Generated B20 reference for admin().

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

## Signature

```solidity theme={null}
function admin() external view returns (address);
```

| Field               | Value        |
| ------------------- | ------------ |
| Selector            | `0xf851a440` |
| Canonical signature | `admin()`    |

## Description

The address authorized to call `activate` and `deactivate`.
Return: Current activation admin.

## Access control

Read-only or ERC-20-standard access rules unless the NatSpec states otherwise.

## Policy interaction

No direct policy interaction.

## Example

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

## 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)