Use Re-Usable Smart Contracts from OpenZeppelin

Having the owner-logic directly in one smart contract isn't very easy to audit. Let's break it down into smaller parts and re-use existing audited smart contracts from OpenZeppelin for that. The latest OpenZeppelin contract does not have an isOwner() function anymore, so we have to create our own. Note that the owner() is a function from the Ownable.sol contract.

//SPDX-License-Identifier: MIT

pragma solidity 0.8.1;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol";

contract SharedWallet is Ownable {

    function isOwner() internal view returns(bool) {
        return owner() == msg.sender;
    }

    function withdrawMoney(address payable _to, uint _amount) public onlyOwner {
        _to.transfer(_amount);
    }

    receive() external payable {

    }
}