function resolve() public {
        require(now >= auctionEnd);
        require(msg.sender == seller);
        require (highBidder != 0);
        
        require (token.transfer(highBidder));

        balanceOf[seller] += balanceOf[highBidder];
        balanceOf[highBidder] = 0;
        highBidder = 0;
    }