// SPDX-License-Identifier: MIT pragma solidity 0.7.6; /** * @title The Owned contract * @notice A contract with helpers for basic contract ownership. */ contract Owned { address payable public owner; address private pendingOwner; event OwnershipTransferRequested( address indexed from, address indexed to ); event OwnershipTransferred( address indexed from, address indexed to ); constructor() { owner = msg.sender; } /** * @dev Allows an owner to begin transferring ownership to a new address, * pending. */ function transferOwnership(address _to) external onlyOwner() { pendingOwner = _to; emit OwnershipTransferRequested(owner, _to); } /** * @dev Allows an ownership transfer to be completed by the recipient. */ function acceptOwnership() external { require(msg.sender == pendingOwner, "Must be proposed owner"); address oldOwner = owner; owner = msg.sender; pendingOwner = address(0); emit OwnershipTransferred(oldOwner, msg.sender); } /** * @dev Reverts if called by anyone other than the contract owner. */ modifier onlyOwner() { require(msg.sender == owner, "Only callable by owner"); _; } }