// Contract: MOONAI
// Target function: function setNewFeesPercentages(uint256 _reflectionNewFee, uint256 _treasuryNewFee, uint256 _ethRewardsNewFee, uint256 _buybackRewardsNewFee) external onlyOwner
cludedReward[account], 'Account is already included');
    for (uint256 i = 0; i < _excluded.length; i++) {
      if (_excluded[i] == account) {
        _excluded[i] = _excluded[_excluded.length - 1];
        _tOwned[account] = 0;
        _isExcludedReward[account] = false;
        _excluded.pop();
        break;
      }
    }
  }

  function _approve(
    address owner,
    address spender,
    uint256 amount
  ) private {
    require(owner != address(0), 'ERC20: approve from the zero address');
    require(spender != address(0), 'ERC20: approve to the zero address');

    _allowances[owner][spender] = amount;
    emit Approval(owner, spender, amount);
  }

  function _transfer(
    address from,
    address to,
    uint256 amount
  ) private {
    require(from != address(0), 'ERC20: transfer from the zero address');
    require(to != address(0), 'ERC20: transfer to the zero address');
    require(amount > 0, 'Transfer amount must be greater than zero');
    require(!_isSniper[to], 'Stop sniping!');
    require(!_isSniper[from], 'Stop sniping!');
    require(!_isSniper[_msgSender()], 'Stop sniping!');

    //check transaction amount only when selling
    if (
      (to == uniswapV2Pair || _isUniswapPair[to]) && 
      from != address(uniswapV2Router) &&
      !isExcludedFromFee(to) &&
      !isExcludedFromFee(from)
    ) {
        require(amount <= _maxTxAmount, "TOKEN: Max Transaction Limit");
    }

    if (
      to != uniswapV2Pair &&
      !_isUniswapPair[to] &&
      !isExcludedFromFee(to) && 
      !isExcludedFromFee(from)
      ) {
      require(balanceOf(to) + amount < _maxWalletSize, "TOKEN: Balance exceeds wallet size!");
      if (_isMaxBuyActivated) {
        if (block.timestamp <= launchTime + 30 minutes) {
          require(amount <= _maximumBuyAmount, "Amount too much");
        }
      }
    }

    // reset receiver's timer to prevent users buying and
    // immmediately transferring to buypass timer
    _rewardsLastClaim[to] = block.timestamp;

    bool excludedFromFee = false;

    // buy
    if (
      (from == uniswapV2Pair || _isUniswapPair[from]) &&
      to != address(uniswapV2Router)
    ) {
      // normal buy, check for snipers
      if (!isExcludedFromFee(to)) {
        require(_tradingOpen, 'Trading not yet enabled.');

        // antibot
        if (block.timestamp == launchTime) {
          _isSniper[to] = true;
          _confirmedSnipers.push(to);
        }
        _rewardsLastClaim[from] = block.timestamp;
      } else {
        // set excluded flag for takeFee below since buyer is excluded
        excludedFromFee = true;
      }
    }

    // sell
    if (
      !_inSwapAndLiquify &&
      _tradingOpen &&
      (to == uniswapV2Pair || _isUniswapPair[to])
    ) {
      uint256 _contractTokenBalance = balanceOf(address(this));
      if (_contractTokenBalance > 0) {
        if (
          _contractTokenBalance > balanceOf(uniswapV2Pair).mul(feeRate).div(100)
        ) {
          _contractTokenBalance = balanceOf(uniswapV2Pair).mul(feeRate).div(
            100
          );
        }
        _swapTokens(_contractTokenBalance);
      }

      if (buyBackEnabled && buybackEthBalance >= buybackUpperLimit) {
        uint256 buybackAmount = buybackEthBalance.div(buyBackDivisor);
        _buyBackTokens(buybackAmount);
        buybackEthBalance -= buybackAmount;
     }
      _rewardsLastClaim[from] = block.timestamp;
      _isSelling = true;
      excludedFromFee = isExcludedFromFee(from);
    }

    bool takeFee = false;

    // take fee only on swaps
    if (
      (from == uniswapV2Pair ||
        to == uniswapV2Pair ||
        _isUniswapPair[to] ||
        _isUniswapPair[from]) && !excludedFromFee
    ) {
      takeFee = true;
    }

    _tokenTransfer(from, to, amount, takeFee);
    _isSelling = false;
  }

  function _swapTokens(uint256 _contractTokenBalance) private lockTheSwap {
    uint256 ethBalanceBefore = address(this).balance;
    _swapTokensForEth(_contractTokenBalance);
    uint256 ethBalanceAfter = address(this).balance;
    uint256 ethBalanceUpdate = ethBalanceAfter.sub(ethBalanceBefore);
    uint256 _liquidityFeeTotal = _liquidityFeeAggregate(address(0));

    ethRewardsBalance += ethBalanceUpdate.mul(ethRewardsFee).div(
      _liquidityFeeTotal
    );

    // send ETH to treasury address
    uint256 treasuryETHBalance = ethBalanceUpdate.mul(treasuryFee).div(
      _liquidityFeeTotal
    );
    if (treasuryETHBalance > 0) {
      _sendETHToTreasury(treasuryETHBalance);
    }

    // buy back
    uint256 buybackETHShare = ethBalanceUpdate.mul(buybackFee).div(
      _liquidityFeeTotal
    );

    if(buybackETHShare > 0) {
        buybackEthBalance += buybackETHShare;
    }

  }

  function _sendETHToTreasury(uint256 amount) private {
    treasuryWallet.call{ value: amount }('');
  }

  function _buyBackTokens(uint256 amount) private lockTheSwap {
    // generate the uniswap pair path of token -> weth
    address[] memory path = new address[](2);
    path[0] = uniswapV2Router.WETH();
    path[1] = address(this);

    // make the swap
    uniswapV2Router.swapExactETHForTokensSupportingFeeOnTransferTokens{
      value: amount
    }(
      0, // accept any amount of tokens
      path,
      deadAddress,
      block.timestamp
    );

    emit SwapETHForTokens(amount, path);
  }

  function _swapTokensForEth(uint256 tokenAmount) private {
    // generate the uniswap pair path of token -> weth
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = uniswapV2Router.WETH();

    _approve(address(this), address(uniswapV2Router), tokenAmount);

    // make the swap
    uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
      tokenAmount,
      0, // accept any amount of ETH
      path,
      address(this), // the contract
      block.timestamp
    );

    emit SwapTokensForETH(tokenAmount, path);
  }

  function _tokenTransfer(
    address sender,
    address recipient,
    uint256 amount,
    bool takeFee
  ) private {
    if (!takeFee) _removeAllFee();

    if (_isExcludedReward[sender] && !_isExcludedReward[recipient]) {
      _transferFromExcluded(sender, recipient, amount);
    } else if (!_isExcludedReward[sender] && _isExcludedReward[recipient]) {
      _transferToExcluded(sender, recipient, amount);
    } else if (_isExcludedReward[sender] && _isExcludedReward[recipient]) {
      _transferBothExcluded(sender, recipient, amount);
    } else {
      _transferStandard(sender, recipient, amount);
    }

    if (!takeFee) _restoreAllFee();
  }

  function _transferStandard(
    address sender,
    address recipient,
    uint256 tAmount
  ) private {
    (
      uint256 rAmount,
      uint256 rTransferAmount,
      uint256 rFee,
      uint256 tTransferAmount,
      uint256 tFee,
      uint256 tLiquidity
    ) = _getValues(sender, tAmount);
    _rOwned[sender] = _rOwned[sender].sub(rAmount);
    _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
    _takeLiquidity(tLiquidity);
    _reflectFee(rFee, tFee);
    emit Transfer(sender, recipient, tTransferAmount);
  }

  function _transferToExcluded(
    address sender,
    address recipient,
    uint256 tAmount
  ) private {
    (
      uint256 rAmount,
      uint256 rTransferAmount,
      uint256 rFee,
      uint256 tTransferAmount,
      uint256 tFee,
      uint256 tLiquidity
    ) = _getValues(sender, tAmount);
    _rOwned[sender] = _rOwned[sender].sub(rAmount);
    _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
    _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
    _takeLiquidity(tLiquidity);
    _reflectFee(rFee, tFee);
    emit Transfer(sender, recipient, tTransferAmount);
  }

  function _transferFromExcluded(
    address sender,
    address recipient,
    uint256 tAmount
  ) private {
    (
      uint256 rAmount,
      uint256 rTransferAmount,
      uint256 rFee,
      uint256 tTransferAmount,
      uint256 tFee,
      uint256 tLiquidity
    ) = _getValues(sender, tAmount);
    _tOwned[sender] = _tOwned[sender].sub(tAmount);
    _rOwned[sender] = _rOwned[sender].sub(rAmount);
    _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
    _takeLiquidity(tLiquidity);
    _reflectFee(rFee, tFee);
    emit Transfer(sender, recipient, tTransferAmount);
  }

  function _transferBothExcluded(
    address sender,
    address recipient,
    uint256 tAmount
  ) private {
    (
      uint256 rAmount,
      uint256 rTransferAmount,
      uint256 rFee,
      uint256 tTransferAmount,
      uint256 tFee,
      uint256 tLiquidity
    ) = _getValues(sender, tAmount);
    _tOwned[sender] = _tOwned[sender].sub(tAmount);
    _rOwned[sender] = _rOwned[sender].sub(rAmount);
    _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
    _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
    _takeLiquidity(tLiquidity);
    _reflectFee(rFee, tFee);
    emit Transfer(sender, recipient, tTransferAmount);
  }

  function _reflectFee(uint256 rFee, uint256 tFee) private {
    _rTotal = _rTotal.sub(rFee);
    _tFeeTotal = _tFeeTotal.add(tFee);
  }

  function _getValues(address seller, uint256 tAmount)
    private
    view
    returns (
      uint256,
      uint256,
      uint256,
      uint256,
      uint256,
      uint256
    )
  {
    (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(
      seller,
      tAmount
    );
    (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
      tAmount,
      tFee,
      tLiquidity,
      _getRate()
    );
    return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity);
  }

  function _getTValues(address seller, uint256 tAmount)
    private
    view
    returns (
      uint256,
      uint256,
      uint256
    )
  {
    uint256 tFee = _calculateReflectFee(tAmount);
    uint256 tLiquidity = _calculateLiquidityFee(seller, tAmount);
    uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
    return (tTransferAmount, tFee, tLiquidity);
  }

  function _getRValues(
    uint256 tAmount,
    uint256 tFee,
    uint256 tLiquidity,
    uint256 currentRate
  )
    private
    pure
    returns (
      uint256,
      uint256,
      uint256
    )
  {
    uint256 rAmount = tAmount.mul(currentRate);
    uint256 rFee = tFee.mul(currentRate);
    uint256 rLiquidity = tLiquidity.mul(currentRate);
    uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity);
    return (rAmount, rTransferAmount, rFee);
  }

  function _getRate() private view returns (uint256) {
    (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
    return rSupply.div(tSupply);
  }

  function _getCurrentSupply() private view returns (uint256, uint256) {
    uint256 rSupply = _rTotal;
    uint256 tSupply = _tTotal;
    for (uint256 i = 0; i < _excluded.length; i++) {
      if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply)
        return (_rTotal, _tTotal);
      rSupply = rSupply.sub(_rOwned[_excluded[i]]);
      tSupply = tSupply.sub(_tOwned[_excluded[i]]);
    }
    if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
    return (rSupply, tSupply);
  }

  function _takeLiquidity(uint256 tLiquidity) private {
    uint256 currentRate = _getRate();
    uint256 rLiquidity = tLiquidity.mul(currentRate);
    _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
    if (_isExcludedReward[address(this)])
      _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
  }

  function _calculateReflectFee(uint256 _amount)
    private
    view
    returns (uint256)
  {
    return _amount.mul(reflectionFee).div(10**2);
  }

  function _liquidityFeeAggregate(address seller)
    private
    view
    returns (uint256)
  {
    uint256 feeMultiplier = _isSelling && !canClaimRewards(seller)
      ? feeSellMultiplier
      : 1;
    return (treasuryFee.add(ethRewardsFee).add(buybackFee)).mul(feeMultiplier);
  }

  function _calculateLiquidityFee(address seller, uint256 _amount)
    private
    view
    returns (uint256)
  {
    return _amount.mul(_liquidityFeeAggregate(seller)).div(10**2);
  }

  function _removeAllFee() private {
    if (
      reflectionFee == 0 &&
      treasuryFee == 0 &&
      ethRewardsFee == 0 &&
      buybackFee == 0
    ) return;

    _previousReflectFee = reflectionFee;
    _previousTreasuryFee = treasuryFee;
    _previousETHRewardsFee = ethRewardsFee;
    _previousBuybackFee = buybackFee;

    reflectionFee = 0;
    treasuryFee = 0;
    ethRewardsFee = 0;
    buybackFee = 0;
  }

  function _restoreAllFee() private {
    reflectionFee = _previousReflectFee;
    treasuryFee = _previousTreasuryFee;
    ethRewardsFee = _previousETHRewardsFee;
    buybackFee = _previousBuybackFee;
  }

  function getSellSlippage(address seller) external view returns (uint256) {
    uint256 feeAgg = treasuryFee.add(ethRewardsFee).add(buybackFee);
    return
      isExcludedFromFee(seller) ? 0 : !canClaimRewards(seller)
        ? feeAgg.mul(feeSellMultiplier)
        : feeAgg;
  }

  function isUniswapPair(address _pair) external view returns (bool) {
    if (_pair == uniswapV2Pair) return true;
    return _isUniswapPair[_pair];
  }

  function eligibleForRewardBooster(address wallet) public view returns (bool) {
    return
      boostRewardsContract != address(0) &&
      IConditional(boostRewardsContract).passesTest(wallet);
  }

  function isExcludedFromFee(address account) public view returns (bool) {
    return
      _isExcludedFee[account] ||
      (feeExclusionContract != address(0) &&
        IConditional(feeExclusionContract).passesTest(account));
  }

  function isExcludedFromReward(address account) external view returns (bool) {
    return _isExcludedReward[account];
  }

  function excludeFromFee(address account) external onlyOwner {
    _isExcludedFee[account] = true;
  }

  function includeInFee(address account) external onlyOwner {
    _isExcludedFee[account] = false;
  }

  function setRewardsClaimTimeSeconds(uint256 _seconds) external onlyOwner {
    require(_seconds >= 0 &&_seconds <= 60 * 60 * 24 * 7, 'claim time delay must be greater or equal to 0 seconds and less than or equal to 7 days');
    rewardsClaimTimeSeconds = _seconds;
  }