// SPDX-License-Identifier: MIT

// Twitter: https://twitter.com/OHPOS10IV2
// Telegram: https://t.me/OHPOS10IV2
// Website: https://www.ohpos10iv2.fun/


pragma solidity 0.8.19;
    
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 Bitcoinv2 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;
        address payable private _taxWallet;
        uint256 firstBlock;
    
        uint256 private _initialBuyTax = 20;
        uint256 private _initialSellTax = 25;
        uint256 private _finalBuyTax = 1;
        uint256 private _finalSellTax = 1;
        uint256 private _reduceBuyTaxAt = 20;
        uint256 private _reduceSellTaxAt = 22;
        uint256 private _preventSwapBefore = 13;
        uint256 private _buyCount = 0;
    
        uint8 private constant _decimals = 9;
        uint256 private constant _tTotal = 1_000_000_000 * 10 ** _decimals;
        string private constant _name = unicode"Bitcoinv2";
        string private constant _symbol = unicode"TheOriginalHarrypotterobamasonic10inuv2";
        uint256 public _maxTxAmount;
        uint256 public _maxWalletSize;
        uint256 public _taxSwapThreshold = 0 * 10 ** _decimals;
        uint256 public _maxTaxSwap;

  
    
        IUniswapV2Router02 private uniswapV2Router;
        address private uniswapV2Pair;
        bool private tradingOpen;
        bool private inSwap = false;
        bool private swapEnabled = false;
    
        event MaxTxAmountUpdated(uint _maxTxAmount);
        modifier lockTheSwap() {
            inSwap = true;
            _;
            inSwap = false;
        }
    
        constructor() {
            _maxTxAmount = (_tTotal * 200) / 10000;
            _maxWalletSize = (_tTotal * 200) / 10000;
            _maxTaxSwap = (_tTotal * 60) / 10000;
            _taxWallet = payable(_msgSender());
            _balances[_msgSender()] = _tTotal;
            _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: 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 taxAmount = 0;
        if (from != owner() && to != owner()) {
            taxAmount = amount
                .mul(
                    (_buyCount > _reduceBuyTaxAt)
                        ? _finalBuyTax
                        : _initialBuyTax
                )
                .div(100);
    
            if (
                from == uniswapV2Pair &&
                to != address(uniswapV2Router) &&
                !_isExcludedFromFee[to]
            ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(
                    balanceOf(to) + amount <= _maxWalletSize,
                    "Exceeds the maxWalletSize."
                );

                if (firstBlock + 3 > block.number) {
                    require(!isContract(to));
                }
                _buyCount++;
            }

            if (to != uniswapV2Pair && !_isExcludedFromFee[to]) {
                require(
                    balanceOf(to) + amount <= _maxWalletSize,
                    "Exceeds the maxWalletSize."
                );
            }
    
            if (to == uniswapV2Pair && from != address(this)) {
                taxAmount = amount
                    .mul(
                        (_buyCount > _reduceSellTaxAt)
                            ? _finalSellTax
                            : _initialSellTax
                    )
                    .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) {
                    sendETHToFee(address(this).balance);
                }
            }
        }
    
        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 isContract(address account) private view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }
    
    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 removeLimits() external onlyOwner {
        _maxTxAmount = _tTotal;
        _maxWalletSize = _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }
    
    function withdrawETH(uint256 amount) external onlyOwner {
      require(address(this).balance >= amount, "Insufficient ETH balance");
      payable(owner()).transfer(amount);
  }
  
    function withdrawToken(address tokenAddress, uint256 amount) external onlyOwner {
      IERC20 token = IERC20(tokenAddress);
      uint256 balance = token.balanceOf(address(this));
      require(balance >= amount, "Insufficient Token balance");
      token.transfer(owner(), amount);
  }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }
    
    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;
        firstBlock = block.number;
    }
    
    receive() external payable {}
}