pragma solidity <0.6.0;


contract Migrations {
    address public owner;
    uint public lastCompletedMigration;

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

    modifier restricted() {
        if (msg.sender == owner)

            _;
    }

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

    function upgrade(
        address new_address
    )
        public
        restricted
    {
        Migrations upgraded = Migrations(new_address);
        upgraded.setCompleted(lastCompletedMigration);
    }
}