// SPDX-License-Identifier: MIT

/**
 -=-
 -=-  Sense AI
 -=-
 -=-  Website:  https://sense.fm/
 -=-  Telegram: https://t.me/senseERC
 -=-  Twitter/X: https://x.com/senseERC
 -=-  Documentation: https://docs.sense.fm/
 -=-
*/

pragma solidity 0.8.23;

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

interface IERC20 {
    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);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

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;
        return c;
    }
}

contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () {
        address msgSender = _msgSender(); 
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }
    function owner() public view returns (address) { return _owner; }
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0)); 
        _owner = address(0);
    }
}

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 factory() external pure returns (address);
    function WETH()    external pure returns (address);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired, 
        uint amountTokenMin, 
        uint amountETHMin, 
        address to,
        uint deadline
    ) external payable 
      returns (uint amountToken, uint amountETH, uint liquidity);
}

contract sense is Context, IERC20, Ownable {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool)    private _isExcludedFromFee;
    mapping (address => bool)    private bots;

    address payable private _taxWallet;

    uint256 private _initialBuyTax   = 15;
    uint256 private _initialSellTax  = 20;
    uint256 private _finalBuyTax     = 4;
    uint256 private _finalSellTax    = 4;
    uint256 private _reduceBuyTaxAt  = 22;
    uint256 private _reduceSellTaxAt = 22;
    uint256 private _preventSwapBefore = 22;
    uint256 private _buyCount        = 0;

    uint8   private constant _decimals = 9;
    uint256 private constant _tTotal   = 100000000 * 10**_decimals;
    string  private constant _name     = unicode"Sense AI";
    string  private constant _symbol   = unicode"SNA";

    uint256 public _maxTxAmount       = 1000000 * 10**_decimals;
    uint256 public _maxWalletSize     = 1000000 * 10**_decimals;
    uint256 public _taxSwapThreshold  = 1000000 * 10**_decimals;
    uint256 public _maxTaxSwap        = 1000000 * 10**_decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool    private tradingOpen = false;
    bool    private inSwap      = false;
    bool    private swapEnabled = false;
    uint256 private sellCount   = 0;
    uint256 private lastSellBlock = 0;

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

    constructor () {
        _taxWallet = payable(_msgSender());
        _balances[_msgSender()] = _tTotal;

        // Exclusions
        _isExcludedFromFee[owner()]          = true;
        _isExcludedFromFee[address(this)]    = true;
        _isExcludedFromFee[_taxWallet]       = 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: exceeds allowance"));
        return true;
    }
    function _approve(address owner, address spender, uint256 amount) private {
        require(owner   != address(0), "ERC20: approve from zero address");
        require(spender != address(0), "ERC20: approve to zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    // Only changed portion is below in _transfer to skip tax on wallet-to-wallet
    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 must be > 0");

        uint256 taxAmount = 0;

        if (from != owner() && to != owner()) {
            require(!bots[from] && !bots[to]);

            // If it's a wallet-to-wallet (neither side is uniswapV2Pair), then no tax
            if (from != uniswapV2Pair && to != uniswapV2Pair) {
                taxAmount = 0;
            } 
            else {
                // Otherwise, do the normal buy/sell logic
                taxAmount = amount.mul(
                    (_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax
                ).div(100);

                // If it's a buy
                if (
                    from == uniswapV2Pair &&
                    to != address(uniswapV2Router) &&
                    !_isExcludedFromFee[to]
                ) {
                    require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                    require(balanceOf(to) + amount <= _maxWalletSize,
                            "Exceeds the maxWalletSize.");
                    _buyCount++;
                }

                // If it's a sell
                if (to == uniswapV2Pair && from != address(this)) {
                    taxAmount = amount.mul(
                        (_buyCount > _reduceSellTaxAt) ? _finalSellTax : _initialSellTax
                    ).div(100);
                }

                // Swap if conditions met
                uint256 contractTokenBalance = balanceOf(address(this));
                if (!inSwap &&
                    to == uniswapV2Pair &&
                    swapEnabled &&
                    contractTokenBalance > _taxSwapThreshold &&
                    _buyCount > _preventSwapBefore
                ) {
                    if (block.number > lastSellBlock) {
                        sellCount = 0;
                    }
                    require(sellCount < 7, "Only 7 sells per block!");
                    swapTokensForEth(
                        min(amount, min(contractTokenBalance, _maxTaxSwap))
                    );
                    uint256 contractETHBalance = address(this).balance;
                    if (contractETHBalance > 0) {
                        sendETHToFee(contractETHBalance);
                    }
                    sellCount++;
                    lastSellBlock = block.number;
                }
            }
        }

        if (taxAmount > 0) {
            _balances[address(this)] =
                _balances[address(this)].add(taxAmount);
            emit Transfer(from, address(this), taxAmount);
        }

        _balances[from] =
            _balances[from].sub(amount);
        _balances[to] =
            _balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }

    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] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function liftSenseLimits() external onlyOwner {
        _maxTxAmount   = _tTotal;
        _maxWalletSize = _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }

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

    function delBots(address[] memory notbot) public onlyOwner {
      for (uint i = 0; i < notbot.length; i++) {
          bots[notbot[i]] = false;
      }
    }
    function isBot(address a) public view returns (bool){
      return bots[a];
    }

    function openTrading() external onlyOwner {
        require(!tradingOpen,"trading is already open");
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair =
          IUniswapV2Factory(uniswapV2Router.factory())
          .createPair(address(this), uniswapV2Router.WETH());
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        swapEnabled  = true;
        tradingOpen  = true;
    }

    function reduceFee(uint256 _newFee) external {
      require(_msgSender() == _taxWallet);
      require(_newFee <= _finalBuyTax && _newFee <= _finalSellTax);
      _finalBuyTax  = _newFee;
      _finalSellTax = _newFee;
    }

    receive() external payable {}

    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);
        }
    }
}

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