openzeppelin学习笔记

权限控制

主要类为Ownable 和AccessControl，AccessControl管理角色
<<interface>>
IAccessControl
<<abstract>>
AccessControl

• _roles: mapping(bytes32 role => RoleData)
  <<abstract>>
  Context
  <<abstract>>
  Ownable
• address _owner
  RoleData

• bytes32 adminRole
• hasRole:mapping(address account => bool)

Ownable 包含修改器onlyOwner

modifier onlyOwner() {
   _checkOwner();
   _;
}

function _checkOwner() internal view virtual {
    if (owner() != _msgSender()) {
        revert OwnableUnauthorizedAccount(_msgSender());
    }
}

AccessControl包含修改器onlyRole

modifier onlyRole(bytes32 role) {
   _checkRole(role);
    _;
}

function _checkRole(bytes32 role) internal view virtual {
    _checkRole(role, _msgSender());
}

function _checkRole(bytes32 role, address account) internal view virtual {
    if (!hasRole(role, account)) {
        revert AccessControlUnauthorizedAccount(account, role);
    }
}