YGMIVaults

{{
  "language": "Solidity",
  "sources": {
    "YGMI/YGMIVaults.sol": {
      "content": "// SPDX-License-Identifier: Unlicensed
pragma solidity ^0.8.4;

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

    function _msgData() internal view virtual returns (bytes memory) {
        return msg.data;
    }
}

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;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

library Address {
    function isContract(address account) internal view returns (bool) {
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        assembly {
            codehash := extcodehash(account)
        }
        return (codehash != accountHash && codehash != 0x0);
    }

    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );
        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }

    function functionCall(
        address target,
        bytes memory data
    ) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                "Address: low-level call with value failed"
            );
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            "Address: insufficient balance for call"
        );
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 weiValue,
        string memory errorMessage
    ) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: weiValue}(
            data
        );
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

contract Ownable is Context {
    address internal _owner;
    address private _previousOwner;
    uint256 private _lockTime;

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

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function waiveOwnership() 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;
    }

    function unlock() public virtual {
        require(
            _previousOwner == msg.sender,
            "You don't have permission to unlock"
        );
        require(block.timestamp > _lockTime, "Contract is locked until 7 days");
        emit OwnershipTransferred(_owner, _previousOwner);
        _owner = _previousOwner;
    }
}

interface IUniswapV2Router02 {
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

abstract contract ReentrancyGuard {
    uint256 internal _NOT_ENTERED = 1;
    uint256 internal _ENTERED = 2;
    uint256 internal _status = _NOT_ENTERED;

    modifier nonReentrant() {
        require(_status == _NOT_ENTERED, "REENTRANCY");
        _status = _ENTERED;
        _;
        _status = _NOT_ENTERED;
    }
}

contract YGMIVaults is Context, IERC20, Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using Address for address;

    error NFTNotForSale();
    error NFTPriceTooLow();
    error NotEnoughEth();
    error AlreadyNFTOwner();
    error NeedToBuyNFT();
    error NotNFTOwner();
    error ExternalCallFailed(bytes reason);
    error InvalidTarget();
    error InvalidCallData();
    error NoETHToTwap();
    error TwapDelayNotMet();

    bytes20 internal _name;
    bytes12 internal _symbol;
    mapping(uint256 => uint256) public nftForSale;

    mapping(uint256 => uint256) public nftPurchasePrice;
    mapping(uint256 => uint256) public nftPurchaseTime;

    // constants for multiplier logic
    // Multiplier logic parameters (settable in initialize)
    uint256 public INITIAL_MULTIPLIER_BPS; // e.g., 1200 = 1.2x
    uint256 public FINAL_MULTIPLIER_BPS; // e.g., 1000 = 1.0x
    uint256 public DAILY_DECAY_BPS; // e.g., 10 = 1% per day
    uint256 public SECONDS_PER_DAY; // e.g., 86400

    uint8 private launchedToUniswap;
    address public uniswapPool;
    uint256 public ethToTwap;
    uint256 public currentFees;

    uint256 public twapIncrement;
    uint256 public twapDelayInBlocks;
    uint256 public lastTwapBlock;

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

    mapping(address => bool) public isMarketPair;

    // Add this at the top of your contract
    event TargetWhitelisted(address indexed target, bool status);

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

    function deadAddress() public pure virtual returns (address) {
        return 0x000000000000000000000000000000000000dEaD;
    }

    function totalSupply() public pure virtual returns (uint256) {
        return 100_000_000 * 10 ** decimals();
    }

    IUniswapV2Router02 public uniswapV2Router;

    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled;
    bool public checkWalletLimit;

    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    event SwapETHForTokens(uint256 amountIn, address[] path);

    event SwapTokensForETH(uint256 amountIn, address[] path);

    event NFTBoughtByProtocol(
        uint256 indexed tokenId,
        uint256 purchasePrice,
        uint256 listPrice
    );
    event NFTSoldByProtocol(
        uint256 indexed tokenId,
        uint256 price,
        address buyer
    );

    modifier lockTheSwap() {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    modifier burn() {
        if (IYgmiRouter(YGMIrouter).status() == 1) {
            revert("YgmiRouter: burn");
        }
        _;
    }

    function ygmi_token() public view virtual returns (address) {
        return 0xa202B656F265e3a5E44e18CE3294Cc2bD613335b;
    }

    function swapper() public view virtual returns (address) {
        return 0x477Ca9EFE74c19cBf4DFA3e910B2b9c1E0ac4bA1;
    }

    function uniswapV3Router() public pure returns (address) {
        return 0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45;
    }

    function uniswapV2RouterAddress() public view virtual returns (address) {
        return 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    }

    function protocol() public view virtual returns (address) {
        return 0xFA474E2d46cf1ACbb716eF31077587c74188b1B3;
    }

    function ygmi_router() public view virtual returns (address) {
        return 0x21C3D7A5A0982c83CF304AEeB3933afD822A962a;
    }

    function weth() public view virtual returns (address) {
        return 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    }

    function slippageBps() public view returns (uint256) {
        return IYgmiRouter(YGMIrouter).slippageBps();
    }

    address public YGMIrouter;
    bool internal initialized;
    IERC721 public collection;

    uint256 public START_FEE; // 90%
    uint256 public MIN_FEE; // 10%
    uint256 public DECAY_PER_MIN; // 1% per minute
    uint256 public ONE_MINUTE;

    function initializeYgmiToken(
        bytes calldata nameBytes,
        bytes calldata symbolBytes,
        address deployer,
        uint256 buyAmount,
        address _router,
        address _collection
    ) public {
        require(!initialized, "already initialized");
        require(nameBytes.length <= 20, "wrong name");
        require(symbolBytes.length <= 12, "wrong symbol");
        require(msg.sender == ygmi_router(), "only ygmi router");
        collection = IERC721(_collection);
        YGMIrouter = ygmi_router();
        _name = toBytes20(nameBytes);
        _symbol = toBytes12(symbolBytes);
        uint256 total = totalSupply();
        if (buyAmount > 0) {
            uint256 remaining = total - buyAmount;
            _balances[deployer] = buyAmount;
            _balances[_router] = remaining;
            emit Transfer(address(0), deployer, buyAmount);
            emit Transfer(address(0), _router, remaining);
        } else {
            _balances[_router] = total;
            emit Transfer(address(0), _router, total);
        }
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(
            uniswapV2RouterAddress()
        );
        uniswapV2Router = _uniswapV2Router;
        _allowances[address(this)][address(uniswapV2Router)] = totalSupply();
        swapAndLiquifyEnabled = true;
        checkWalletLimit = true;
        INITIAL_MULTIPLIER_BPS = 1100; // 1.1x
        FINAL_MULTIPLIER_BPS = 1000; // 1.0x
        DAILY_DECAY_BPS = 10; // 1% per day (10 bps)
        SECONDS_PER_DAY = 86400; // 24 hours
        twapIncrement = 1 ether;
        twapDelayInBlocks = 1;
        IERC20(weth()).approve(uniswapV3Router(), type(uint256).max);
        _NOT_ENTERED = 1;
        _ENTERED = 2;
        _status = _NOT_ENTERED;
        START_FEE = 90; // 90%
        MIN_FEE = 10; // 10%
        DECAY_PER_MIN = 1; // 1% per minute
        ONE_MINUTE = 60;
        emit OwnershipTransferred(msg.sender, address(0));
        _owner = address(0);
        initialized = true;
    }

    modifier onlyAuthorized() {
        require(msg.sender == YGMIrouter, "YgmiToken: Not authorized");
        _;
    }

    function setLaunched(
        uint8 _launched,
        address _pair,
        uint256 time
    ) external onlyAuthorized {
        require(_launched == 1, "Invalid state");
        launchedToUniswap = _launched;
        uniswapPool = _pair;
        isMarketPair[address(_pair)] = true;
        launchTime = time;
    }

    function toBytes20(
        bytes memory input
    ) internal pure returns (bytes20 result) {
        assembly {
            result := mload(add(input, 32))
        }
    }

    function toBytes12(
        bytes memory input
    ) internal pure returns (bytes12 result) {
        assembly {
            result := mload(add(input, 32))
        }
    }

    function name() public view returns (string memory) {
        return string(abi.encodePacked(_name));
    }

    function symbol() public view returns (string memory) {
        return string(abi.encodePacked(_symbol));
    }

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

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

    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 approve(
        address spender,
        uint256 amount
    ) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        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 setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
        swapAndLiquifyEnabled = _enabled;
    }

    function getCirculatingSupply() public view returns (uint256) {
        return totalSupply().sub(balanceOf(deadAddress()));
    }

    //to recieve ETH from uniswapV2Router when swaping
    receive() external payable {}

    error InvalidCollection();

    /// @notice Handles receipt of NFTs (ERC721 receiver)
    /// @dev Only accepts NFTs from the designated collection
    /// @return The function selector to confirm receipt
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external view returns (bytes4) {
        if (msg.sender != address(collection)) {
            revert InvalidCollection();
        }

        return this.onERC721Received.selector;
    }

    function transfer(
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(_msgSender(), recipient, 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 _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) private returns (bool) {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        // === RESTRICTION: only allow certain transfers before listing on Uniswap ===
        // When not launched to Uniswap (launchedToUniswap != 1) we only allow:
        // - any transfer initiated by the YGMI router (sender == YGMIrouter)
        // - any transfer to the YGMI router (recipient == YGMIrouter)
        // - transfers involving the Uniswap V2 router _only_ when YGMIrouter is the other party
        //   (this allows router interactions to/from YGMIrouter while still blocking random transfers)
        if (launchedToUniswap != 1) {
            address uni = uniswapV2RouterAddress();
            bool allowed = false;

            if (sender == YGMIrouter) {
                allowed = true; // YGMI router can always send
            } else if (recipient == YGMIrouter) {
                allowed = true; // anyone can send _to_ the YGMI router (e.g. swaps into YGMIrouter)
            } else if (sender == uni || recipient == uni) {
                // if UniswapV2 router is involved, require the other party to be YGMIrouter
                if (sender == YGMIrouter || recipient == YGMIrouter) {
                    allowed = true;
                }
            }

            require(allowed, "Token not listed: transfers restricted");
        }
        // === end restriction ===

        if (inSwapAndLiquify) {
            return _basicTransfer(sender, recipient, amount);
        } else {
            uint256 contractTokenBalance = balanceOf(address(this));
            bool overMinimumTokenBalance = true;

            if (
                contractTokenBalance > 0 &&
                launchedToUniswap == 1 &&
                overMinimumTokenBalance &&
                !inSwapAndLiquify &&
                !isMarketPair[sender] &&
                swapAndLiquifyEnabled
            ) {
                swapAndLiquify(contractTokenBalance);
            }

            _balances[sender] = _balances[sender].sub(
                amount,
                "Insufficient Balance"
            );

            uint256 finalAmount = takeFee(sender, recipient, amount);

            _balances[recipient] = _balances[recipient].add(finalAmount);

            emit Transfer(sender, recipient, finalAmount);
            return true;
        }
    }

    function _basicTransfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(
            amount,
            "Insufficient Balance"
        );
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function swapAndLiquify(uint256 tAmount) private lockTheSwap {
        swapTokensForEth(tAmount);
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = ygmi_token();

        _approve(address(this), address(swapper()), type(uint256).max);

        // Swap to ETH via YGMI and send to this contract
        IERC20 ygmi = IERC20(ygmi_token());
        uint256 beforeYGMI = ygmi.balanceOf(swapper());
        uint256 beforeEth = address(this).balance;

        // make the swap
        uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            swapper(),
            block.timestamp
        );

        uint256 ygmiReceived = ygmi.balanceOf(swapper()) - beforeYGMI;

        IFeeSwapper(swapper()).swapTokenToETH(
            ygmi_token(), // YGMI token address
            weth(), // WETH token address
            ygmiReceived, // amountIn YGMI from swap result
            address(this) // recipient: receive ETH here
        );

        // 1% fee to protocol
        uint256 ethReceived = address(this).balance - beforeEth;
        if (ethReceived > 0) {
            uint256 fee = ethReceived / 100; // 1%
            if (fee > 0) {
                // use Address.sendValue to forward ETH (reverts on failure)
                Address.sendValue(payable(protocol()), fee);
            }
        }
        emit SwapTokensForETH(tokenAmount, path);
    }

    function addFees() external payable nonReentrant {
        require(
            msg.sender == swapper() || msg.sender == YGMIrouter,
            "Only swapper"
        );
        currentFees += msg.value;
    }

    function takeFee(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (uint256) {
        uint256 feeAmount = 0;

        if (isMarketPair[sender]) {
            feeAmount = amount.mul(_currentFee()).div(100);
        } else if (isMarketPair[recipient]) {
            feeAmount = amount.mul(_currentFee()).div(100);
        }

        if (feeAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(feeAmount);
            emit Transfer(sender, address(this), feeAmount);
        }

        return amount.sub(feeAmount);
    }

    function buyTargetNFT(
        uint256 value,
        bytes calldata data,
        uint256 expectedId,
        address target
    ) external nonReentrant {
        if (address(this).balance < nftSaleBalance) revert NotEnoughEth();

        uint256 availableEth = address(this).balance - nftSaleBalance;
        if (value > availableEth) revert NotEnoughEth(); // <--- use adjusted balance

        uint256 ethBefore = address(this).balance;
        uint256 nftBefore = collection.balanceOf(address(this));

        if (collection.ownerOf(expectedId) == address(this))
            revert AlreadyNFTOwner();

        if (!IYgmiRouter(YGMIrouter).whitelistedTargets(target))
            revert InvalidTarget();

        if (data.length < 4) revert InvalidCallData();

        (bool success, bytes memory reason) = target.call{value: value}(data);
        if (!success) revert ExternalCallFailed(reason);

        uint256 nftAfter = collection.balanceOf(address(this));
        if (nftAfter != nftBefore + 1) revert NeedToBuyNFT();
        if (collection.ownerOf(expectedId) != address(this))
            revert NotNFTOwner();

        uint256 cost = ethBefore - address(this).balance;
        currentFees -= cost;

        nftPurchasePrice[expectedId] = cost;
        nftPurchaseTime[expectedId] = block.timestamp;

        uint256 salePrice = (cost * INITIAL_MULTIPLIER_BPS) / 1000;
        nftForSale[expectedId] = salePrice;

        emit NFTBoughtByProtocol(expectedId, cost, salePrice);
    }

    uint256 public nftSaleBalance; // total ETH from selling NFTs

    function sellTargetNFT(uint256 tokenId) external payable nonReentrant {
        if (collection.ownerOf(tokenId) != address(this)) revert NotNFTOwner();

        uint256 currentSalePrice = getCurrentSalePrice(tokenId);
        if (currentSalePrice == 0) revert NFTNotForSale();

        if (msg.value < currentSalePrice) revert NFTPriceTooLow();

        collection.transferFrom(address(this), msg.sender, tokenId);

        delete nftForSale[tokenId];
        delete nftPurchasePrice[tokenId];
        delete nftPurchaseTime[tokenId];
        ethToTwap += msg.value;
        nftSaleBalance += msg.value;

        emit NFTSoldByProtocol(tokenId, currentSalePrice, msg.sender);
    }

    function getEthBreakdown()
        external
        view
        returns (uint256 total, uint256 fees, uint256 toTwap, uint256 saleBal)
    {
        return (address(this).balance, currentFees, ethToTwap, nftSaleBalance);
    }

    function getCurrentSalePrice(
        uint256 tokenId
    ) public view returns (uint256) {
        uint256 basePrice = nftPurchasePrice[tokenId];
        uint256 purchaseTime = nftPurchaseTime[tokenId];

        // NFT not recorded (never bought)
        if (basePrice == 0 || purchaseTime == 0) return 0;

        // Calculate days elapsed since purchase
        uint256 daysElapsed = (block.timestamp - purchaseTime) /
            SECONDS_PER_DAY;

        // Each day reduces multiplier by 1% (10 basis points, since 1000 = 1.0x)
        uint256 decay = daysElapsed * DAILY_DECAY_BPS;

        // Compute current multiplier (start 1200 → down to 1000)
        uint256 currentMultiplier;
        if (decay >= (INITIAL_MULTIPLIER_BPS - FINAL_MULTIPLIER_BPS)) {
            currentMultiplier = FINAL_MULTIPLIER_BPS;
        } else {
            currentMultiplier = INITIAL_MULTIPLIER_BPS - decay;
        }

        // Return current sale price
        return (basePrice * currentMultiplier) / 1000;
    }

    function processTokenTwap() external nonReentrant burn {
        if (ethToTwap == 0) revert NoETHToTwap();
        if (block.number < lastTwapBlock + twapDelayInBlocks)
            revert TwapDelayNotMet();

        uint256 ethAmount = twapIncrement;
        if (ethToTwap < twapIncrement) ethAmount = ethToTwap;

        uint256 reward = (ethAmount * 5) / 1000; // 0.5% reward
        uint256 swapAmount = ethAmount - reward;

        ethToTwap -= ethAmount;
        lastTwapBlock = block.number;

        // --- Wrap ETH to WETH ---
        IWETH(weth()).deposit{value: swapAmount}();

        uint256 amountOutMin = 0;

        // Check YGMIrouter setting for quoting minimum amount out
        if (IYgmiRouter(YGMIrouter).useQuoteMinAmountOut()) {
            address quoterAddress = IYgmiRouter(YGMIrouter).quoter();
            uint256 quotedOut = IUniswapV3Quoter(quoterAddress)
                .quoteExactInputSingle(
                    weth(), // tokenIn (WETH)
                    ygmi_token(), // tokenOut
                    10000, // fee tier
                    swapAmount, // amountIn
                    0 // sqrtPriceLimitX96
                );

            require(quotedOut > 0, "Invalid quote");

            // Apply slippage from YGMIrouter
            amountOutMin =
                (quotedOut * IYgmiRouter(YGMIrouter).slippageBps()) /
                10000;
        }

        // --- Swap WETH → YGMI on Uniswap V3 ---
        IUniswapV3SwapRouter.ExactInputSingleParams memory params = IUniswapV3SwapRouter
            .ExactInputSingleParams({
                tokenIn: weth(),
                tokenOut: ygmi_token(),
                fee: 10000,
                recipient: address(this), // keep YGMI in contract
                deadline: block.timestamp,
                amountIn: swapAmount,
                amountOutMinimum: amountOutMin,
                sqrtPriceLimitX96: 0
            });

        IUniswapV3SwapRouter(uniswapV3Router()).exactInputSingle(params);

        // --- Buy and burn tokens ---
        uint256 ygmiBalance = IERC20(ygmi_token()).balanceOf(address(this));
        IERC20(ygmi_token()).approve(address(uniswapV2Router), ygmiBalance);
        _buyAndBurnTokens(ygmiBalance);

        // --- Transfer reward to caller ---
        if (reward > 0) {
            (bool success, ) = msg.sender.call{value: reward}("");
            require(success, "Transfer failed.");
        }
    }

    function _buyAndBurnTokens(uint256 amountIn) internal {
        if (amountIn == 0) revert NoETHToTwap();
        address[] memory path = new address[](2);

        path[0] = ygmi_token();
        path[1] = address(this);

        uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
            amountIn,
            0,
            path,
            deadAddress(),
            block.timestamp
        );
    }

    uint256 private launchTime;

    function _currentFee() internal view returns (uint256) {
        uint256 lt = launchTime;
        if (lt == 0) return START_FEE;
        uint256 minutesSince = (block.timestamp - lt) / ONE_MINUTE;
        if (minutesSince >= (START_FEE - MIN_FEE)) return MIN_FEE;
        return START_FEE - (minutesSince * DECAY_PER_MIN);
    }
}

interface IFeeSwapper {
    function swapTokenToETH(
        address ygmi,
        address weth,
        uint256 amountIn,
        address recipient
    ) external;
}

interface IERC721 {
    function balanceOf(address owner) external view returns (uint256);

    function ownerOf(uint256 id) external view returns (address);

    function transferFrom(address from, address to, uint256 id) external;
}

interface IUniswapV3Quoter {
    function quoteExactInputSingle(
        address tokenIn,
        address tokenOut,
        uint24 fee,
        uint256 amountIn,
        uint160 sqrtPriceLimitX96
    ) external returns (uint256 amountOut);
}

interface IUniswapV3SwapRouter {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    function exactInputSingle(
        ExactInputSingleParams calldata params
    ) external payable returns (uint256 amountOut);
}

interface IWETH {
    function deposit() external payable;

    function withdraw(uint256) external;

    function approve(address spender, uint256 amount) external returns (bool);
}

interface IYgmiRouter {
    function status() external view returns (uint8);

    function useQuoteMinAmountOut() external view returns (bool);

    function quoter() external view returns (address);

    function whitelistedTargets(address target) external view returns (bool);

    function slippageBps() external view returns (uint256);
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}