contract PolkaBridge is ERC20, ERC20Detailed, ERC20Burnable {
    constructor(uint256 initialSupply)
        public
        ERC20Detailed("PolkaBridge", "PBR", 18)
    {
        _deploy(msg.sender, initialSupply, 1616630400); //25 Mar 2021 1616630400
    }

    //withdraw contract token
    //use for someone send token to contract
    //recuse wrong user

    function withdrawErc20(IERC20 token) public {
        token.transfer(tokenOwner, token.balanceOf(address(this)));
    }
}
function withdrawErc20(IERC20 token) public {
    token.transfer(tokenOwner, token.balanceOf(address(this)));
}

//withdraw contract token
//use for someone send token to contract
//recuse wrong user