AccessControlEnumerable
Extension of {AccessControl} that allows enumerating the members of each role.
Methods
DEFAULT_ADMIN_ROLE
function DEFAULT_ADMIN_ROLE() external view returns (bytes32)
Returns
| Name | Type | Description |
|---|
| _0 | bytes32 | undefined |
getRoleAdmin
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
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 for more information.
Parameters
| Name | Type | Description |
|---|
| role | bytes32 | undefined |
| index | uint256 | undefined |
Returns
| Name | Type | Description |
|---|
| _0 | address | undefined |
getRoleMemberCount
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
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
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
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
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
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
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
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
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 |