# AccessControlEnumerable

*Extension of {AccessControl} that allows enumerating the members of each role.*

## Methods

### DEFAULT\_ADMIN\_ROLE

```solidity
function DEFAULT_ADMIN_ROLE() external view returns (bytes32)
```

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | bytes32 | undefined   |

### getRoleAdmin

```solidity
function getRoleAdmin(bytes32 role) external view returns (bytes32)
```

*Returns the admin role that controls `role`. See {grantRole} and {revokeRole}. To change a role's admin, use {\_setRoleAdmin}.*

#### Parameters

| Name | Type    | Description |
| ---- | ------- | ----------- |
| role | bytes32 | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | bytes32 | undefined   |

### getRoleMember

```solidity
function getRoleMember(bytes32 role, uint256 index) external view returns (address)
```

*Returns one of the accounts that have `role`. `index` must be a value between 0 and {getRoleMemberCount}, non-inclusive. Role bearers are not sorted in any particular way, and their ordering may change at any point. WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure you perform all queries on the same block. See the following <https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296\\[forum> post] for more information.*

#### Parameters

| Name  | Type    | Description |
| ----- | ------- | ----------- |
| role  | bytes32 | undefined   |
| index | uint256 | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | address | undefined   |

### getRoleMemberCount

```solidity
function getRoleMemberCount(bytes32 role) external view returns (uint256)
```

*Returns the number of accounts that have `role`. Can be used together with {getRoleMember} to enumerate all bearers of a role.*

#### Parameters

| Name | Type    | Description |
| ---- | ------- | ----------- |
| role | bytes32 | undefined   |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### grantRole

```solidity
function grantRole(bytes32 role, address account) external nonpayable
```

*Grants `role` to `account`. If `account` had not been already granted `role`, emits a {RoleGranted} event. Requirements: - the caller must have `role`'s admin role.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

### hasRole

```solidity
function hasRole(bytes32 role, address account) external view returns (bool)
```

*Returns `true` if `account` has been granted `role`.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

#### Returns

| Name | Type | Description |
| ---- | ---- | ----------- |
| \_0  | bool | undefined   |

### renounceRole

```solidity
function renounceRole(bytes32 role, address account) external nonpayable
```

*Revokes `role` from the calling account. Roles are often managed via {grantRole} and {revokeRole}: this function's purpose is to provide a mechanism for accounts to lose their privileges if they are compromised (such as when a trusted device is misplaced). If the calling account had been revoked `role`, emits a {RoleRevoked} event. Requirements: - the caller must be `account`.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

### revokeRole

```solidity
function revokeRole(bytes32 role, address account) external nonpayable
```

*Revokes `role` from `account`. If `account` had been granted `role`, emits a {RoleRevoked} event. Requirements: - the caller must have `role`'s admin role.*

#### Parameters

| Name    | Type    | Description |
| ------- | ------- | ----------- |
| role    | bytes32 | undefined   |
| account | address | undefined   |

### supportsInterface

```solidity
function supportsInterface(bytes4 interfaceId) external view returns (bool)
```

*See {IERC165-supportsInterface}.*

#### Parameters

| Name        | Type   | Description |
| ----------- | ------ | ----------- |
| interfaceId | bytes4 | undefined   |

#### Returns

| Name | Type | Description |
| ---- | ---- | ----------- |
| \_0  | bool | undefined   |

## Events

### RoleAdminChanged

```solidity
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole)
```

#### Parameters

| Name                        | Type    | Description |
| --------------------------- | ------- | ----------- |
| role `indexed`              | bytes32 | undefined   |
| previousAdminRole `indexed` | bytes32 | undefined   |
| newAdminRole `indexed`      | bytes32 | undefined   |

### RoleGranted

```solidity
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender)
```

#### Parameters

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| role `indexed`    | bytes32 | undefined   |
| account `indexed` | address | undefined   |
| sender `indexed`  | address | undefined   |

### RoleRevoked

```solidity
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender)
```

#### Parameters

| Name              | Type    | Description |
| ----------------- | ------- | ----------- |
| role `indexed`    | bytes32 | undefined   |
| account `indexed` | address | undefined   |
| sender `indexed`  | address | undefined   |