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[forum post] 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