> ## Documentation Index
> Fetch the complete documentation index at: https://docs.base.org/llms.txt
> Use this file to discover all available pages before exploring further.

# IB20.revokeRole

> Revokes a role from an account on a B20 token.

## Signature

```solidity IB20.sol theme={null}
function revokeRole(bytes32 role, address account) external;
```

| Field               | Value                         |
| ------------------- | ----------------------------- |
| Selector            | `0xd547741f`                  |
| Canonical signature | `revokeRole(bytes32,address)` |

## Description

Revokes `role` from `account` and emits `RoleRevoked(role, account, sender)`. B20 follows OpenZeppelin AccessControl semantics, under which revoking a role the account does not hold changes nothing and emits no event.

## Parameters

| Parameter | Description             |
| --------- | ----------------------- |
| `role`    | Role to revoke.         |
| `account` | Account to revoke from. |

## Reverts

* `AccessControlUnauthorizedAccount`: caller does not hold the admin role for `role`, or the token has no admins (transitioned via `renounceLastAdmin`).
* `LastAdminCannotRenounce`: `role == DEFAULT_ADMIN_ROLE` and `account` is the last remaining `DEFAULT_ADMIN_ROLE` holder. Use `renounceLastAdmin` to clear the final admin intentionally.

## Access Control

The caller must hold `getRoleAdmin(role)`. On a fresh token every role's admin is `DEFAULT_ADMIN_ROLE`. After `setRoleAdmin` is called the new admin role applies; `revokeRole` is not hardcoded to `DEFAULT_ADMIN_ROLE`.

## Policy Interaction

No direct policy interaction.

## Example

```solidity Usage Example theme={null}
IB20(target).revokeRole(MINT_ROLE, account);
```