pragma solidity >=0.7.0 <0.9.0;

/**

@title Owner

@dev Set & change owner */ contract Owner {

address private owner;

// event for EVM logging event OwnerSet(address indexed oldOwner, address indexed newOwner);

// modifier to check if caller is owner modifier isOwner() { // If the first argument of 'require' evaluates to 'false', execution terminates and all // changes to the state and to Ether balances are reverted. // This used to consume all gas in old EVM versions, but not anymore. // It is often a good idea to use 'require' to check if functions are called correctly. // As a second argument, you can also provide an explanation about what went wrong. require(msg.sender == owner, "Caller is not owner"); _; }

/**

@dev Set contract deployer as owner / constructor() { owner = msg.sender; // 'msg.sender' is sender of current call, contract deployer for a constructor emit OwnerSet(address(0), owner); } /*

@dev Change owner @param newOwner address of new owner / function changeOwner(address newOwner) public isOwner { emit OwnerSet(owner, newOwner); owner = newOwner; } /*

@dev Return owner address @return address of owner */ function getOwner() external view returns (address) { return owner; } } © 2022 GitHub, Inc. Terms Privacy Security Status Docs Contact GitHub Pricing