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Owner.sol
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Owner.sol
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.4;
contract Owner {
address public owner;
address[] private _ownerHistory;
event OwnerChanged(address indexed _from, address indexed _to);
event OwnerHistory(address[] _history);
constructor() {
owner = msg.sender;
_ownerHistory.push(msg.sender);
}
modifier onlyOwner {
require(_isOwner(), "MOD_ONLY_OWNER");
_;
}
function getOwnerHistory() external {
emit OwnerHistory(_ownerHistory);
}
function setOwner(address _newOwner) external onlyOwner {
owner = _newOwner;
_ownerHistory.push(_newOwner);
emit OwnerChanged(msg.sender, _newOwner);
}
function _isOwner() internal view returns(bool) {
return msg.sender == owner;
}
}