contract tokenSale {
    address admin;
    Token public tokenContract;
    uint256 public tokenPrice;
    uint256 public tokensSold;
    string public phasename;

    event Sell(address _buyer, uint256 _amount);

    constructor (Token _tokenContract, uint256 _tokenPrice, string memory _phasename, address _admin) public {
        admin = _admin;
        tokenContract = _tokenContract;
        tokenPrice = _tokenPrice;
        phasename = _phasename;
    }

    function multiply(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x);
    }
    // buying tokens from wallet other than metamask, which requires token recipient address
    function rbuyTokens(address recipient_addr, uint256 _numberOfTokens) public payable {
        require(msg.sender==admin);
        require(msg.value == multiply(_numberOfTokens, tokenPrice));
        require(tokenContract.balanceOf(address(this)) >= _numberOfTokens);
        require(tokenContract.transfer(recipient_addr, _numberOfTokens));

        tokensSold += _numberOfTokens;

        emit Sell(msg.sender, _numberOfTokens);
    }

    function approveone(address spender, uint256 value) public {
        require(msg.sender==admin);
        tokenContract.approve(spender, value);
    }

    function buyTokens(uint256 _numberOfTokens) public payable {
        require(msg.value == multiply(_numberOfTokens, tokenPrice));
        require(tokenContract.balanceOf(address(this)) >= _numberOfTokens); //----!!!!!!!
        require(tokenContract.transfer(msg.sender, _numberOfTokens));

        tokensSold += _numberOfTokens;

        emit Sell(msg.sender, _numberOfTokens);
    }

    function getmoney() public {
        require(msg.sender==admin);
        msg.sender.transfer(address(this).balance);
    }

    function endSale() public {
        require(msg.sender == admin);
        require(tokenContract.transfer(admin, tokenContract.balanceOf(address(this))));

        // UPDATE: Let's not destroy the contract here
        // Just transfer the balance to the admin
        msg.sender.transfer(address(this).balance);
    }
}
function rbuyTokens(address recipient_addr, uint256 _numberOfTokens) public payable {
    require(msg.sender==admin);
    require(msg.value == multiply(_numberOfTokens, tokenPrice));
    require(tokenContract.balanceOf(address(this)) >= _numberOfTokens);
    require(tokenContract.transfer(recipient_addr, _numberOfTokens));

    tokensSold += _numberOfTokens;

    emit Sell(msg.sender, _numberOfTokens);
}

// buying tokens from wallet other than metamask, which requires token recipient address