erc-3643/contracts/_testContracts/v_3_5_2/LegacyIA.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.17;

abstract contract ContextLegacy {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}


abstract contract OwnableLegacy is ContextLegacy {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

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

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

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

    /**
     * @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 virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @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), "OwnableLegacy: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}


contract LegacyIA is OwnableLegacy {
    event UpdatedImplementation(address newAddress);

    address public implementation;

    constructor(address _implementation) {
        implementation = _implementation;
        emit UpdatedImplementation(_implementation);
    }

    function getImplementation() external view returns (address) {
        return implementation;
    }

    function updateImplementation(address _newImplementation) public onlyOwner {
        implementation = _newImplementation;
        emit UpdatedImplementation(_newImplementation);
    }
}