/*

    Copyright 2020 DODO ZOO.
    SPDX-License-Identifier: Apache-2.0

*/

pragma solidity 0.6.9;
pragma experimental ABIEncoderV2;


contract Migrations {
    address public owner;
    uint256 public last_completed_migration;

    modifier restricted() {
        if (msg.sender == owner) {
            _;
        }
    }

    constructor() public {
        owner = msg.sender;
    }

    function setCompleted(uint256 completed) public restricted {
        last_completed_migration = completed;
    }

    function upgrade(address newAddress) public restricted {
        Migrations upgraded = Migrations(newAddress);
        upgraded.setCompleted(last_completed_migration);
    }
}
