// SPDX-License-Identifier: Unlicensed

// Bit gold was one of the earliest attempts at creating a decentralized virtual currency, proposed by blockchain pioneer Nick Szabo in 1998. Although the bit gold project was never implemented, Szabo's attempt is widely considered to be the precursor to Satoshi Nakamoto’s bitcoin protocol. In fact, the bit gold and bitcoin protocols draw such close parallels that people have speculated that Szabo is the anonymous bitcoin creator, Satoshi Nakamoto (although Szabo has denied this claim).

// $BITGOLD :)

// T.ME/BITGOLDGG
// TWITTER.COM/BITGOLDGG
// BITGOLD.GG



pragma solidity ^0.8.16;

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) {
        return a + b;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; 
        return msg.data;
    }
}

abstract contract Ownable is Context {
    address internal _owner;
    address private _previousOwner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    constructor() {
        _owner = _msgSender();
        emit OwnershipTransferred(address(0), _owner);
    }

    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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

interface IUniswapV2Factory  {
    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);
}

interface IuniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
}

interface IUniswapV2Router02 is IuniswapV2Router01 {
}

contract BITGOLD is Context, IERC20, Ownable {

    using SafeMath for uint256;
    mapping(address => uint256) private _rOwned;
    mapping(address => uint256) private _tOwned;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _isExcludedFromFee;
    mapping(address => bool) private _isExcluded;
    mapping(address => bool) private _isExcludedFromMaxWallet;

    address[] private _excluded;
    address public _marketingWalletAddress;
    address constant _burnAddress = 0x000000000000000000000000000000000000dEaD;
    uint256 private constant MAX = ~uint256(0);
    uint256 private _tTotal;
    uint256 private _rTotal;
    uint256 private _tFeeTotal;
    string private _name;
    string private _symbol;
    uint256 private _decimals;

    uint256 private _buyTaxFee = 0;
    uint256 private _buyMarketingFee = 0;
    uint256 private _buyBurnFee = 0;

    uint256 private _sellTaxFee = 0;
    uint256 private _sellMarketingFee = 0;
    uint256 private _sellBurnFee = 0;

    uint256 public _taxFee = _buyTaxFee;
    uint256 public _marketingFee = _buyMarketingFee;
    uint256 public _burnFee = _buyBurnFee;

    uint256 private _previousTaxFee = _taxFee;
    uint256 private _previousMarketingFee = _marketingFee;
    uint256 private _previousBurnFee = _burnFee;

    IUniswapV2Router02  public uniswapV2Router ;
    address public uniswapV2Pair;
    uint256 public maxWalletBalance;
    bool public tradingEnabled = false;

    constructor() {
        _name = "BITGOLD"; // <= CHANGE TOKEN NAME HERE 
        _symbol = "BITGOLD"; // <= CHANGE SYMBOL HERE 
        _decimals = 18; // <= CHANGE DECIMAL HERE 
        _tTotal = 21000000 * 10**_decimals; // <= CHANGE TOTOAL SUPPLY HERE 
        maxWalletBalance = 630000  * 10**_decimals; //  <= CHANGE MAX WALLET LIMIT HERE  
        _rTotal = (MAX - (MAX % _tTotal));
        _marketingWalletAddress = 0x7f06FF3c63037158fE4B8215Fe6F0336B9A6b8af;  // <= CHANGE MARKETING WALLET ADDRESS HERE 
        _rOwned[_msgSender()] = _rTotal;

        IUniswapV2Router02  _uniswapV2Router = IUniswapV2Router02 (
             0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        uniswapV2Pair  = IUniswapV2Factory (_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        uniswapV2Router  = _uniswapV2Router;
        _owner = _msgSender();

        _isExcludedFromFee[_msgSender()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_marketingWalletAddress] = true;

        _isExcludedFromMaxWallet[owner()] = true;
        _isExcludedFromMaxWallet[address(this)] = true;
        _isExcludedFromMaxWallet[_burnAddress] = true;
        _isExcludedFromMaxWallet[_marketingWalletAddress]= true;

        _isExcluded[_burnAddress] = true;
        _isExcluded[uniswapV2Pair ] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint256) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _tTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        if (_isExcluded[account]) return _tOwned[account];
        return tokenFromReflection(_rOwned[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 increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    function isExcludedFromReward(address account) public view returns (bool) {
        return _isExcluded[account];
    }

    function totalFees() public view returns (uint256) {
        return _tFeeTotal;
    }

    function deliver(uint256 tAmount) public {
        address sender = _msgSender();
        require(
            !_isExcluded[sender],
            "Excluded addresses cannot call this function"
        );
        (uint256 rAmount, , , , , , ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rTotal = _rTotal.sub(rAmount);
        _tFeeTotal = _tFeeTotal.add(tAmount);
    }

    function reflectionFromToken(uint256 tAmount, bool deductTransferFee)
        public
        view
        returns (uint256)
    {
        require(tAmount <= _tTotal, "Amount must be less than supply");
        if (!deductTransferFee) {
            (uint256 rAmount, , , , , , ) = _getValues(tAmount);
            return rAmount;
        } else {
            (, uint256 rTransferAmount, , , , , ) = _getValues(tAmount);
            return rTransferAmount;
        }
    }

    function tokenFromReflection(uint256 rAmount)
        public
        view
        returns (uint256)
    {
        require(
            rAmount <= _rTotal,
            "Amount must be less than total reflections"
        );
        uint256 currentRate = _getRate();
        return rAmount.div(currentRate);
    }

    function excludeFromReward(address account) public onlyOwner {
        require(!_isExcluded[account], "Account is already excluded");
        if (_rOwned[account] > 0) {
            _tOwned[account] = tokenFromReflection(_rOwned[account]);
        }
        _isExcluded[account] = true;
        _excluded.push(account);
    }

    function includeInReward(address account) external onlyOwner {
        require(_isExcluded[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;
                _isExcluded[account] = false;
                _excluded.pop();
                break;
            }
        }
    }

    function _transferBothExcluded(
        address sender,
        address recipient,
        uint256 tAmount
    ) private {
        (
            uint256 rAmount,
            uint256 rTransferAmount,
            uint256 rFee,
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getValues(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);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function excludeFromFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = true;
    }

     function enableTrading() external onlyOwner {
        tradingEnabled = true;
    }

    function includeInFee(address account) public onlyOwner {
        _isExcludedFromFee[account] = false;
    }

    function includeAndExcludedFromMaxWallet(address account, bool value) public onlyOwner {
            _isExcludedFromMaxWallet[account] = value;
    }

    function isExcludedFromMaxWallet(address account) public view returns(bool){
            return _isExcludedFromMaxWallet[account];
    }

    function setSellFeePercent(
        uint256 tFee,
        uint256 mFee,
        uint256 cFee
    ) external onlyOwner {
        _sellTaxFee = tFee;
        _taxFee = _sellTaxFee;
        _sellMarketingFee = mFee;
        _marketingFee = _sellMarketingFee;
        _sellBurnFee = cFee;
        _burnFee = _sellBurnFee;
    }

    function setBuyFeePercent(
        uint256 tFee,
        uint256 mFee,
        uint256 cFee
    ) external onlyOwner {
        _buyTaxFee = tFee;
        _taxFee = _buyTaxFee;
        _buyMarketingFee = mFee;
        _marketingFee = _buyMarketingFee;
        _buyBurnFee = cFee;
        _burnFee = _buyBurnFee;
    }

    function setMarketingWalletAddress(address _addr) external onlyOwner {
        _marketingWalletAddress = _addr;
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function _getValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        (
            uint256 tTransferAmount,
            uint256 tFee,
            uint256 tBurn,
            uint256 tMarket
        ) = _getTValues(tAmount);
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(
            tAmount,
            tFee,
            tBurn,
            tMarket,
            _getRate()
        );
        return (
            rAmount,
            rTransferAmount,
            rFee,
            tTransferAmount,
            tFee,
            tBurn,
            tMarket
        );
    }

    function _getTValues(uint256 tAmount)
        private
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        uint256 tFee = calculateTaxFee(tAmount);
        uint256 tBurn = calculateBurn(tAmount);
        uint256 tMarket = calculateMarketingFee(tAmount);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tBurn).sub(
            tMarket
        );
        return (tTransferAmount, tFee, tBurn, tMarket);
    }

    function _getRValues(
        uint256 tAmount,
        uint256 tFee,
        uint256 tBurn,
        uint256 tMarket,
        uint256 currentRate
    )
        private
        pure
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rBurn = tBurn.mul(currentRate);
        uint256 rMarket= tMarket.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rBurn).sub(
            rMarket
        );
        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 _takeBurn(uint256 tBurn)
        private
    {
         uint256 currentRate = _getRate();
        uint256 rBurn = tBurn.mul(
            currentRate
        );
        _rOwned[_burnAddress] = _rOwned[_burnAddress].add(
            rBurn
        );
        if (_isExcluded[_burnAddress])
            _tOwned[_burnAddress] = _tOwned[_burnAddress].add(
                tBurn
            );
    }

    function _takeMarketing(uint256 tMarket) private {
        uint256 currentRate = _getRate();
        uint256 rMarket = tMarket.mul(currentRate);
        _rOwned[_marketingWalletAddress] = _rOwned[_marketingWalletAddress].add(
            rMarket
        );
        if (_isExcluded[_marketingWalletAddress])
            _tOwned[_marketingWalletAddress] = _tOwned[_marketingWalletAddress].add(
                tMarket
            );
    }

    function calculateTaxFee(uint256 _amount) private view returns (uint256) {
        return _amount.mul(_taxFee).div(10**4);
    }

    function calculateMarketingFee(uint256 _amount)
        private
        view
        returns (uint256)
    {
        return _amount.mul(_marketingFee).div(10**4);
    }

    function calculateBurn(uint256 _amount)
        private
        view
        returns (uint256)
    {
        return _amount.mul(_burnFee).div(10**4);
    }

    function removeAllFee() private {
        _previousTaxFee = _taxFee;
        _previousMarketingFee = _marketingFee;
        _previousBurnFee = _burnFee;

        _taxFee = 0;
        _marketingFee = 0;
        _burnFee = 0;
    }

    function restoreAllFee() private {
        _taxFee = _previousTaxFee;
        _marketingFee = _previousMarketingFee;
        _burnFee = _previousBurnFee;
    }

    function isExcludedFromFee(address account) public view returns (bool) {
        return _isExcludedFromFee[account];
    }

    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");
        if (from != owner() && !tradingEnabled) {
            require(tradingEnabled, "Trading is not enabled yet");
        }

         if (
                from != owner() &&
                to != address(this) &&
                to != _burnAddress &&
                to != uniswapV2Pair
            ) {
                uint256 currentBalance = balanceOf(to);
                require(
                    _isExcludedFromMaxWallet[to] ||
                        (currentBalance + amount <= maxWalletBalance),
                    "ERC20: Reached Max wallet holding"
                );
            }
        
        bool takeFee = true;
        if (_isExcludedFromFee[from] || _isExcludedFromFee[to]) {
            takeFee = false;
        } else {
            if (from == uniswapV2Pair ) {
                _taxFee = _buyTaxFee;
                _marketingFee = _buyMarketingFee;
                _burnFee = _buyBurnFee;
            } else if (to == uniswapV2Pair ) {
                _taxFee = _sellTaxFee;
                _marketingFee = _sellMarketingFee;
                _burnFee = _sellBurnFee;
            } else {
                _taxFee = 0;
                _marketingFee = 0;
                _burnFee = 0;
            }
        }
       
        _tokenTransfer(from, to, amount, takeFee);

    }

    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amount,
        bool takeFee
    ) private {
        if (!takeFee) removeAllFee();

        if (_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferFromExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && _isExcluded[recipient]) {
            _transferToExcluded(sender, recipient, amount);
        } else if (!_isExcluded[sender] && !_isExcluded[recipient]) {
            _transferStandard(sender, recipient, amount);
        } else if (_isExcluded[sender] && _isExcluded[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 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _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 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _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 tBurn,
            uint256 tMarket
        ) = _getValues(tAmount);
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
        _takeBurn(tBurn);
        _takeMarketing(tMarket);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }
}