chapter27-code-1
Thu Mar 30 2023 11:42:56 GMT+0000 (Coordinated Universal Time)
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@RareSkills
contract Ownable {
address public owner;
constructor() {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner, "onlyOwner");
_;
}
function changeOwner(address newOwner) public onlyOwner {
owner = newOwner;
}
}
contract HoldFunds is Ownable {
function withdrawFunds() public onlyOwner {
(bool ok, ) = owner.call{value: address(this).balance}("");
require(ok, "transfer failed");
}
receive() external payable {
}
}
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