// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;


contract Ownable {
    address public owner;

    event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);

    constructor () {
        owner = msg.sender;
        emit OwnershipTransferred(address(0), owner);
    }

    /// @dev Throws if called by any account other than the owner.
    modifier onlyOwner() {
        require(owner == msg.sender, "Ownable: caller is not the owner");
        _;
    }

    /// @dev Transfers ownership of the contract to a new account (`newOwner`).
    /// Can only be called by the current owner.
    function transferOwnership(address newOwner) public onlyOwner {
        emit OwnershipTransferred(owner, newOwner);
        owner = newOwner;
    }
}