/* Bring back the Golden Days of Shiba!
Today's Shiba management has 0 skills and is worse than your local non profit restaurant.
This project is by the community for the community in the pursuit of bringing back to good golden days of when Shib was great. 
*/

// SPDX-License-Identifier:MIT
pragma solidity ^0.8.18;

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
    );
}

// Dex Factory contract interface
interface IDexFactory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);
}

// Dex Router contract interface
interface IDexRouter {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    constructor() {
        _owner = _msgSender();
        emit OwnershipTransferred(address(0), _owner);
    }

    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 = payable(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;
    }
}

contract GOLDENSHIBA is Context, IERC20, Ownable {
    string private _name = "Golden Shib";
    string private _symbol = "gSHIB";
    uint8 private _decimals = 18;
    uint256 private _totalSupply = 420_690_000_000 * 1e18;

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    mapping(address => bool) public isExcludedFromFee;
    mapping(address => bool) public isExcludedFromMaxTxn;
    mapping(address => bool) public isExcludedFromMaxHolding;

    uint256 public minTokenToSwap = (_totalSupply * 5) / (1000); // this amount will trigger swap and distribute
    uint256 public maxHoldLimit = (_totalSupply * 2) / (100); // this is the max wallet holding limit
    uint256 public maxTxnLimit = (_totalSupply * 1) / (100); // this is the max transaction limit
    uint256 public percentDivider = 100;
    uint256 public launchedAt;

    bool public distributeAndLiquifyStatus; // should be true to turn on to liquidate the pool
    bool public feesStatus; // enable by default
    bool public trading; // once enable can't be disable afterwards

    IDexRouter public dexRouter; // router declaration

    address public dexPair; // pair address declaration
    address public marketingWallet; // marketing address declaration
    address private constant DEAD = address(0xdead);
    address private constant ZERO = address(0);

    uint256 public marketingFeeOnBuying = 20;
    uint256 public marketingFeeOnSelling = 40;

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    constructor() {
        _balances[owner()] = _totalSupply;
        marketingWallet = address(0xa34DC88AcF5b61C4f653Caf194687c3E4728C70C);

        dexRouter = IDexRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        isExcludedFromFee[address(dexRouter)] = true;
        isExcludedFromMaxTxn[address(dexRouter)] = true;
        isExcludedFromMaxHolding[address(dexRouter)] = true;

        dexPair = IDexFactory(dexRouter.factory()).createPair(
            address(this),
            dexRouter.WETH()
        );
        isExcludedFromMaxHolding[dexPair] = true;

        //exclude owner and this contract from fee
        isExcludedFromFee[owner()] = true;
        isExcludedFromFee[address(this)] = true;

        //exclude owner and this contract from max Txn
        isExcludedFromMaxTxn[owner()] = true;
        isExcludedFromMaxTxn[address(this)] = true;

        //exclude owner and this contract from max hold limit
        isExcludedFromMaxHolding[owner()] = true;
        isExcludedFromMaxHolding[address(this)] = true;
        isExcludedFromMaxHolding[marketingWallet] = true;

        emit Transfer(address(0), owner(), _totalSupply);
    }

    //to receive ETH from dexRouter when swapping
    receive() external payable {}

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    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()] - amount
        );
        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] + (addedValue)
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] - subtractedValue
        );
        return true;
    }

    function includeOrExcludeFromFee(
        address account,
        bool value
    ) external onlyOwner {
        isExcludedFromFee[account] = value;
    }

    function includeOrExcludeFromMaxTxn(
        address account,
        bool value
    ) external onlyOwner {
        isExcludedFromMaxTxn[account] = value;
    }

    function includeOrExcludeFromMaxHolding(
        address account,
        bool value
    ) external onlyOwner {
        isExcludedFromMaxHolding[account] = value;
    }

    function setMinTokenToSwap(uint256 _amount) external onlyOwner {
        minTokenToSwap = _amount * 1e18;
    }

    function setMaxHoldLimit(uint256 _amount) external onlyOwner {
        maxHoldLimit = _amount * 1e18;
    }

    function setMaxTxnLimit(uint256 _amount) external onlyOwner {
        maxTxnLimit = _amount * 1e18;
    }

    function setBuyFeePercent(uint256 _marketingFee) external onlyOwner {
        marketingFeeOnBuying = _marketingFee;
    }

    function setSellFeePercent(uint256 _marketingFee) external onlyOwner {
        marketingFeeOnSelling = _marketingFee;
    }

    function setDistributionStatus(bool _value) public onlyOwner {
        distributeAndLiquifyStatus = _value;
    }

    function enableOrDisableFees(bool _value) external onlyOwner {
        feesStatus = _value;
    }

    function updateAddresses(address _marketingWallet) external onlyOwner {
        marketingWallet = _marketingWallet;
    }

    function enableTrading() external onlyOwner {
        require(!trading, ": already enabled");

        trading = true;
        feesStatus = true;
        distributeAndLiquifyStatus = true;
        launchedAt = block.timestamp;
    }

    function removeStuckEth(address _receiver) public onlyOwner {
        payable(_receiver).transfer(address(this).balance);
    }

    function totalBuyFeePerTx(uint256 amount) public view returns (uint256) {
        uint256 fee = (amount * marketingFeeOnBuying) / (percentDivider);
        return fee;
    }

    function totalSellFeePerTx(uint256 amount) public view returns (uint256) {
        uint256 fee = (amount * marketingFeeOnSelling) / (percentDivider);
        return fee;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), " approve from the zero address");
        require(spender != address(0), "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), "transfer from the zero address");
        require(to != address(0), "transfer to the zero address");
        require(amount > 0, "Amount must be greater than zero");
        if (!isExcludedFromMaxTxn[from] && !isExcludedFromMaxTxn[to]) {
            require(amount <= maxTxnLimit, " max txn limit exceeds");

            // trading disable till launch
            if (!trading) {
                require(
                    dexPair != from && dexPair != to,
                    ": trading is disable"
                );
            }
        }

        if (!isExcludedFromMaxHolding[to]) {
            require(
                (balanceOf(to) + amount) <= maxHoldLimit,
                ": max hold limit exceeds"
            );
        }

        // swap and liquify
        distributeAndLiquify(from, to);

        //indicates if fee should be deducted from transfer
        bool takeFee = true;

        //if any account belongs to isExcludedFromFee account then remove the fee
        if (isExcludedFromFee[from] || isExcludedFromFee[to] || !feesStatus) {
            takeFee = false;
        }

        //transfer amount, it will take tax, burn, liquidity fee
        _tokenTransfer(from, to, amount, takeFee);
    }

    //this method is responsible for taking all fees, if takeFee is true
    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amount,
        bool takeFee
    ) private {
        if (dexPair == sender && takeFee) {
            uint256 allFee;
            uint256 tTransferAmount;
            allFee = totalBuyFeePerTx(amount);
            tTransferAmount = amount - allFee;

            _balances[sender] = _balances[sender] - amount;
            _balances[recipient] = _balances[recipient] + tTransferAmount;
            emit Transfer(sender, recipient, tTransferAmount);

            takeTokenFee(sender, allFee);
        } else if (dexPair == recipient && takeFee) {
            uint256 allFee = totalSellFeePerTx(amount);
            uint256 tTransferAmount = amount - allFee;
            _balances[sender] = _balances[sender] - amount;
            _balances[recipient] = _balances[recipient] + tTransferAmount;
            emit Transfer(sender, recipient, tTransferAmount);

            takeTokenFee(sender, allFee);
        } else {
            _balances[sender] = _balances[sender] - amount;
            _balances[recipient] = _balances[recipient] + (amount);
            emit Transfer(sender, recipient, amount);
        }
    }

    function takeTokenFee(address sender, uint256 amount) private {
        _balances[address(this)] = _balances[address(this)] + (amount);

        emit Transfer(sender, address(this), amount);
    }

    // to withdarw ETH from contract
    function withdrawETH(uint256 _amount) external onlyOwner {
        require(address(this).balance >= _amount, "Invalid Amount");
        payable(msg.sender).transfer(_amount);
    }

    // to withdraw ERC20 tokens from contract
    function withdrawToken(IERC20 _token, uint256 _amount) external onlyOwner {
        require(_token.balanceOf(address(this)) >= _amount, "Invalid Amount");
        _token.transfer(msg.sender, _amount);
    }

    function distributeAndLiquify(address from, address to) private {
        uint256 contractTokenBalance = balanceOf(address(this));

        bool shouldSell = contractTokenBalance >= minTokenToSwap;

        if (
            shouldSell &&
            from != dexPair &&
            distributeAndLiquifyStatus &&
            !(from == address(this) && to == dexPair) // swap 1 time
        ) {
            // approve contract
            _approve(address(this), address(dexRouter), minTokenToSwap);

            // now is to lock into liquidty pool
            Utils.swapTokensForEth(address(dexRouter), minTokenToSwap);
            uint256 ethForMarketing = address(this).balance;

            // sending Eth to Marketing wallet
            if (ethForMarketing > 0)
                payable(marketingWallet).transfer(ethForMarketing);
        }
    }
}

// Library for swapping on Dex
library Utils {
    function swapTokensForEth(
        address routerAddress,
        uint256 tokenAmount
    ) internal {
        IDexRouter dexRouter = IDexRouter(routerAddress);

        // generate the Dex pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = dexRouter.WETH();

        // make the swap
        dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp + 300
        );
    }

    function addLiquidity(
        address routerAddress,
        address owner,
        uint256 tokenAmount,
        uint256 ethAmount
    ) internal {
        IDexRouter dexRouter = IDexRouter(routerAddress);

        // add the liquidity
        dexRouter.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            owner,
            block.timestamp + 300
        );
    }
}