// File: /Users/hieptran/Documents/Projects/nami/namismartcontractv2/contracts/Migrations.sol



// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;

contract Migrations {
  address public owner = msg.sender;
  uint public last_completed_migration;

  modifier restricted() {
    require(
      msg.sender == owner,
      "This function is restricted to the contract's owner"
    );
    _;
  }

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }

  function changeOwner(address newOwner) public restricted {
    require(newOwner != address(0), "Migration: new owner is the zero address");
    owner = newOwner;
  }
}