SteleFund

{{
  "language": "Solidity",
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 600
    },
    "viaIR": true,
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  },
  "sources": {
    "contracts/SteleFund.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

// Simplified interfaces for Stele integration
import "./interfaces/ISteleFund.sol";
import "./interfaces/ISteleFundInfo.sol";
import "./interfaces/ISteleFundSetting.sol";
import "./interfaces/ISteleFundManagerNFT.sol";
import "./libraries/PriceOracle.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

interface IWETH9 {
  function deposit() external payable;
  function withdraw(uint256 wad) external;
  function transfer(address to, uint256 value) external returns (bool);
  function transferFrom(address from, address to, uint256 value) external returns (bool);
  function balanceOf(address account) external view returns (uint256);
}

interface IERC20Minimal {
  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);
  function decimals() external view returns (uint8);
}


contract SteleFund is ISteleFund, ReentrancyGuard {
  using PriceOracle for address;

  address public override owner;

  // Uniswap V3 Contract
  address public constant swapRouter = 0xE592427A0AEce92De3Edee1F18E0157C05861564;
  address public constant uniswapV3Factory = 0x1F98431c8aD98523631AE4a59f267346ea31F984; // For price oracle

  // Precision scaling for more accurate calculations
  uint256 private constant BASIS_POINTS = 10000; // 100% = 10000 basis points
  
  // Minimum thresholds to prevent dust issues
  uint256 private constant MIN_DEPOSIT_USD = 10; // Minimum $10 deposit
  
  // Maximum fund ID to prevent abuse
  uint256 private constant MAX_FUND_ID = 1000000000; // Maximum 1 billion funds
  
  // Maximum swaps per transaction to prevent DoS
  uint256 private constant MAX_SWAPS_PER_TX = 10;

  address public weth9;
  address public setting;
  address public info;
  address public usdToken; // USDC address for price calculation
  address public managerNFTContract; // SteleFundManagerNFT contract address

  modifier onlyOwner() {
      require(msg.sender == owner, 'NO');
      _;
  }

  modifier onlyManager(address sender, uint256 fundId) {
    require(fundId == ISteleFundInfo(info).managingFund(sender), "NM");
    _;
  }

  constructor(
    address _weth9, 
    address _setting, 
    address _info, 
    address _usdToken
  ) {
    weth9 = _weth9;
    setting = _setting;
    info = _info;
    usdToken = _usdToken;
    owner = msg.sender;
  }

  // Safe fund ID parsing from calldata
  function parseFundId(bytes memory data) private pure returns (uint256 fundId) {
    require(data.length == 32, "IDL"); // Must be exactly 32 bytes for uint256
    
    // Use standard ABI decoding for safety
    fundId = abi.decode(data, (uint256));
    
    // Prevent unreasonably large fund IDs
    require(fundId > 0 && fundId <= MAX_FUND_ID, "FID");
  }
  
  // Calculate portfolio total value in USD
  function getPortfolioValueUSD(uint256 fundId) internal view returns (uint256) {
    IToken.Token[] memory fundTokens = ISteleFundInfo(info).getFundTokens(fundId);
    uint256 totalValueUSD = 0;

    for (uint256 i = 0; i < fundTokens.length; i++) {
      if (fundTokens[i].amount > 0) {
        uint256 tokenValueUSD = PriceOracle.getTokenPriceUSD(uniswapV3Factory, fundTokens[i].token, fundTokens[i].amount, weth9, usdToken);
        totalValueUSD += tokenValueUSD;
      }
    }

    return totalValueUSD;
  }

  // Calculate shares to mint based on USD value with improved precision
  function _calculateSharesToMint(uint256 fundId, address token, uint256 amount) private view returns (uint256) {
    uint256 fundShare = ISteleFundInfo(info).getFundShare(fundId);

    // First deposit: shares = USD value of deposit
    if (fundShare == 0) {
      uint256 usdValue = PriceOracle.getTokenPriceUSD(uniswapV3Factory, token, amount, weth9, usdToken);
      return usdValue;
    }
    
    // Get deposit value in USD
    uint256 depositValueUSD = PriceOracle.getTokenPriceUSD(uniswapV3Factory, token, amount, weth9, usdToken);
    if (depositValueUSD == 0) return 0;
    
    // Get current portfolio value in USD
    uint256 portfolioValueUSD = getPortfolioValueUSD(fundId);
    if (portfolioValueUSD == 0) {
      return depositValueUSD;
    }
    
    // Use mulDiv for maximum precision: (depositValue * existingShares) / portfolioValue
    // This avoids intermediate overflow and maintains precision
    uint256 shares = PriceOracle.mulDiv(depositValueUSD, fundShare, portfolioValueUSD);

    // Round up to favor the protocol (prevent rounding attacks)
    if ((depositValueUSD * fundShare) % portfolioValueUSD > 0) {
      shares += 1;
    }
    
    return shares;
  }

  fallback() external payable nonReentrant { 
    // Safe fund ID parsing with validation
    uint256 fundId = parseFundId(msg.data);
    
    // Verify fund exists (fundId > 0 already checked in parseFundId)
    require(fundId <= ISteleFundInfo(info).fundIdCount(), "FNE");
    require(ISteleFundInfo(info).isJoined(msg.sender, fundId), "US");
    
    // Check minimum USD deposit amount
    {
      uint256 depositUSD = PriceOracle.getTokenPriceUSD(uniswapV3Factory, weth9, msg.value, weth9, usdToken);
      uint8 decimals = IERC20Minimal(usdToken).decimals();
      require(decimals <= 18, "ID"); // Prevent overflow
      require(depositUSD >= MIN_DEPOSIT_USD * (10 ** uint256(decimals)), "MDA"); // Minimum $10 deposit
    }
    
    // Calculate manager fee (only for investors, not manager)
    uint256 feeAmount = 0;
    uint256 fundAmount = msg.value;
    if (msg.sender != ISteleFundInfo(info).manager(fundId)) {
      uint256 feeRate = ISteleFundSetting(setting).managerFee();
      feeAmount = PriceOracle.mulDiv(msg.value, feeRate, BASIS_POINTS);
      fundAmount = msg.value - feeAmount;
    }
    
    // Calculate shares based on net deposit amount (after fee deduction)
    uint256 sharesToMint = _calculateSharesToMint(fundId, weth9, fundAmount);
    require(sharesToMint > 0, "ZS"); // Zero shares
    
    // Update state FIRST (before external calls)
    ISteleFundInfo(info).increaseFundToken(fundId, weth9, fundAmount); // Net amount to fund pool
    if (feeAmount > 0) {
      ISteleFundInfo(info).increaseFeeToken(fundId, weth9, feeAmount); // Fee amount to fee pool
    }
    (uint256 investorShare, uint256 fundShare) = ISteleFundInfo(info).increaseShare(fundId, msg.sender, sharesToMint);
    
    emit Deposit(fundId, msg.sender, weth9, msg.value, investorShare, fundShare, fundAmount, feeAmount);

    // External call LAST
    IWETH9(weth9).deposit{value: msg.value}();
  }

  receive() external payable {
    if (msg.sender == weth9) {
      // when call IWETH9(weth9).withdraw(amount) in this contract
    } else {
      // when deposit ETH with no data
    }
  }

  function withdraw(uint256 fundId, uint256 percentage) external payable override nonReentrant {
    bool isJoined = ISteleFundInfo(info).isJoined(msg.sender, fundId);
    require(isJoined, "US");
    require(percentage > 0 && percentage <= 10000, "IP"); // 0.01% to 100%
    
    uint256 investorShare = ISteleFundInfo(info).getInvestorShare(fundId, msg.sender);
    require(investorShare > 0, "NS");
    
    _withdraw(fundId, investorShare, percentage);
  }
  
  function _withdraw(uint256 fundId, uint256 investorShareBefore, uint256 percentage) private {
    IToken.Token[] memory fundTokens = ISteleFundInfo(info).getFundTokens(fundId);
    uint256 fundShare = ISteleFundInfo(info).getFundShare(fundId);
    require(fundShare > 0, "ZFS"); // Zero fund shares

    uint256 shareToWithdraw = PriceOracle.mulDiv(investorShareBefore, percentage, 10000);
    
    // If shareToWithdraw is 0 due to rounding, just return - no need to complicate
    if (shareToWithdraw == 0) {
      return; // No withdrawal, save gas
    }

    // Update state FIRST (before external calls)
    (uint256 investorShareAfter, uint256 fundShareAfter) = ISteleFundInfo(info).decreaseShare(fundId, msg.sender, shareToWithdraw);
    emit Withdraw(fundId, msg.sender, percentage, investorShareAfter, fundShareAfter);

    for (uint256 i = 0; i < fundTokens.length; i++) {
      if (fundTokens[i].amount > 0) {
        // Calculate token amount with overflow protection using mulDiv
        // Calculate token share directly: (amount * investorShareBefore * percentage) / (fundShare * 10000)
        uint256 tokenShare = PriceOracle.mulDiv(
          PriceOracle.mulDiv(fundTokens[i].amount, investorShareBefore, fundShare),
          percentage,
          10000
        );
        
        // Ensure we don't withdraw more than available
        if (tokenShare > fundTokens[i].amount) {
          tokenShare = fundTokens[i].amount;
        }
        
        if (tokenShare > 0) {
          address token = fundTokens[i].token;
          
          // Update state FIRST (before external calls)
          ISteleFundInfo(info).decreaseFundToken(fundId, token, tokenShare);
          
          // External calls LAST
          if (token == weth9) {
            IWETH9(weth9).withdraw(tokenShare);
            (bool success, ) = payable(msg.sender).call{value: tokenShare}("");
            require(success, "FW");
          } else {
            IERC20Minimal(token).transfer(msg.sender, tokenShare);
          }
        }
      }
    }
  }

  // Uniswap V3 Swap Implementation with slippage protection
  function executeV3Swap(uint256 fundId, SwapParams calldata trade) private {
    require(ISteleFundSetting(setting).isInvestable(trade.tokenOut), "NWT");
    require(trade.amountIn <= ISteleFundInfo(info).getFundTokenAmount(fundId, trade.tokenIn), "NET");
    
    // Validate slippage and check token limits
    _validateSwapParameters(fundId, trade);
    
    // Calculate effective minimum output
    uint256 effectiveMinOutput = _calculateEffectiveMinOutput(trade);
    
    // Update state FIRST - decrease the token we're swapping from
    ISteleFundInfo(info).decreaseFundToken(fundId, trade.tokenIn, trade.amountIn);

    // Execute the swap
    uint256 amountOut = _executeSwapCall(trade, effectiveMinOutput);
    
    // Validate output and update state
    require(amountOut >= effectiveMinOutput, "SLP");
    ISteleFundInfo(info).increaseFundToken(fundId, trade.tokenOut, amountOut);
    emit Swap(fundId, trade.tokenIn, trade.tokenOut, trade.amountIn, amountOut);
  }
  
  // Helper function to validate swap parameters
  function _validateSwapParameters(uint256 fundId, SwapParams calldata trade) private view {
    // Check maxTokens limit for new tokens
    if (ISteleFundInfo(info).getFundTokenAmount(fundId, trade.tokenOut) == 0) {
      IToken.Token[] memory fundTokens = ISteleFundInfo(info).getFundTokens(fundId);
      uint256 currentTokenTypes = 0;
      for (uint256 i = 0; i < fundTokens.length; i++) {
        if (fundTokens[i].amount > 0) {
          currentTokenTypes++;
        }
      }
      require(currentTokenTypes < ISteleFundSetting(setting).maxTokens(), "MAX");
    }
  }
  
  // Helper function to calculate effective minimum output
  function _calculateEffectiveMinOutput(SwapParams calldata trade) private view returns (uint256) {
    uint256 expectedOutput = PriceOracle.getBestQuote(
      uniswapV3Factory,
      trade.tokenIn,
      trade.tokenOut,
      uint128(trade.amountIn),
      300
    );
    
    uint256 slippage = ISteleFundSetting(setting).maxSlippage();
    uint256 minOutputWithSlippage = PriceOracle.mulDiv(expectedOutput, BASIS_POINTS - slippage, BASIS_POINTS);
    
    require(trade.amountOutMinimum >= minOutputWithSlippage, "ESP"); // Excessive slippage protection
    
    return trade.amountOutMinimum;
  }
  
  // Helper function to execute swap call
  function _executeSwapCall(SwapParams calldata trade, uint256 effectiveMinOutput) private returns (uint256) {
    // Safe approve pattern: reset to 0 first, then set new amount
    // This prevents issues with tokens like USDT that don't allow changing non-zero allowances
    IERC20Minimal(trade.tokenIn).approve(swapRouter, 0);
    IERC20Minimal(trade.tokenIn).approve(swapRouter, trade.amountIn);
    
    bytes memory swapCall = abi.encodeWithSignature(
      "exactInputSingle((address,address,uint24,address,uint256,uint256,uint256,uint160))",
      trade.tokenIn,
      trade.tokenOut,
      trade.fee,
      address(this),
      block.timestamp + 300,
      trade.amountIn,
      effectiveMinOutput,
      0
    );
    
    uint256 balanceBefore = IERC20Minimal(trade.tokenOut).balanceOf(address(this));
    (bool success, ) = swapRouter.call(swapCall);
    require(success, "SWF");
    
    return IERC20Minimal(trade.tokenOut).balanceOf(address(this)) - balanceBefore;
  }

  function swap(uint256 fundId, SwapParams[] calldata trades) 
    external override onlyManager(msg.sender, fundId) nonReentrant
  {
    require(trades.length <= MAX_SWAPS_PER_TX, "TMS"); // Too Many Swaps
    for(uint256 i=0; i<trades.length; i++)
    {
      // Use Uniswap V3 SwapRouter for all swaps
      executeV3Swap(fundId, trades[i]);
    }
  }

  function withdrawFee(uint256 fundId, address token, uint256 percentage) 
    external payable override onlyManager(msg.sender, fundId) nonReentrant
  {
    require(percentage > 0 && percentage <= 10000, "IP"); // 0.01% to 100%
    
    uint256 totalFeeAmount = ISteleFundInfo(info).getFeeTokenAmount(fundId, token);
    require(totalFeeAmount > 0, "NF"); // No fee available
    
    // Calculate amount to withdraw using high precision
    uint256 amount = PriceOracle.precisionMul(totalFeeAmount, percentage, 10000);
    
    // If amount is 0 due to rounding, return
    if (amount == 0) {
      return; // Save gas
    }
    
    // Ensure we don't withdraw more than available
    if (amount > totalFeeAmount) {
      amount = totalFeeAmount;
    }
    
    // Update state FIRST (before external calls)
    bool isSuccess = ISteleFundInfo(info).decreaseFeeToken(fundId, token, amount);
    require(isSuccess, "FD");
    
    // This line should not be here - fee tokens are separate from fund tokens
    // ISteleFundInfo(info).decreaseFundToken(fundId, token, amount);
    
    emit WithdrawFee(fundId, msg.sender, token, amount);
    
    // External calls LAST
    if (token == weth9) {
      IWETH9(weth9).withdraw(amount);
      (bool success, ) = payable(msg.sender).call{value: amount}("");
      require(success, "FW");
    } else {
      IERC20Minimal(token).transfer(msg.sender, amount);
    }
  }

  // Transfer ownership (only owner)
  function transferOwnership(address newOwner) external onlyOwner {
    require(newOwner != address(0), "ZA"); // Zero Address
    owner = newOwner;
    emit OwnershipTransferred(msg.sender, newOwner);
  }

  // Set Manager NFT Contract (only callable by info contract owner)
  function setManagerNFTContract(address _managerNFTContract) external override onlyOwner {
    require(_managerNFTContract != address(0), "NZ");
    managerNFTContract = _managerNFTContract;
    emit ManagerNFTContractSet(_managerNFTContract);
  }

  // Get Manager NFT Contract address
  function getManagerNFTContract() external view override returns (address) {
    return managerNFTContract;
  }

  // Mint Manager NFT (only callable by fund manager)
  function mintManagerNFT(uint256 fundId) external override onlyManager(msg.sender, fundId) nonReentrant returns (uint256) {
    require(managerNFTContract != address(0), "NNC"); // NFT Contract Not set
    address manager = ISteleFundInfo(info).manager(fundId);
    require(manager == msg.sender, "NM");

    // Create mint parameters
    MintParams memory params = MintParams({
      fundId: fundId,
      fundCreated: ISteleFundInfo(info).fundCreationBlock(fundId), // Get actual fund creation block
      investment: ISteleFundInfo(info).getFundShare(fundId),
      currentTVL: getPortfolioValueUSD(fundId)
    });

    // Call NFT contract to mint
    return ISteleFundManagerNFT(managerNFTContract).mintManagerNFT(params);
  }
}
"
    },
    "@openzeppelin/contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}
"
    },
    "contracts/libraries/PriceOracle.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

// Direct Uniswap V3 interfaces
interface IUniswapV3Factory {
    function getPool(address tokenA, address tokenB, uint24 fee) 
        external view returns (address pool);
}

interface IUniswapV3Pool {
    function observe(uint32[] calldata secondsAgos)
        external
        view
        returns (
            int56[] memory tickCumulatives, 
            uint160[] memory secondsPerLiquidityCumulativeX128s
        );
    
    function slot0() external view returns (
        uint160 sqrtPriceX96,
        int24 tick,
        uint16 observationIndex,
        uint16 observationCardinality,
        uint16 observationCardinalityNext,
        uint8 feeProtocol,
        bool unlocked
    );
}

/// @title Price Oracle Library
/// @notice Library for calculating Time-Weighted Average Prices using Uniswap V3
/// @dev Provides functions for TWAP calculation, tick math, and price conversion
library PriceOracle {
    
    // Standard Uniswap V3 fee tiers - using function to return array
    function getFeeTiers() private pure returns (uint16[3] memory) {
        return [uint16(500), uint16(3000), uint16(10000)]; // 0.05%, 0.3%, 1%
    }
    
    // Default TWAP period (30 minutes)
    uint32 public constant DEFAULT_TWAP_PERIOD = 1800;
    
    /// @notice Calculate TWAP tick for a given pool and time period
    /// @param pool The Uniswap V3 pool address
    /// @param secondsAgo The time period for TWAP calculation
    /// @return timeWeightedAverageTick The calculated TWAP tick
    function getTWAPTick(address pool, uint32 secondsAgo) internal view returns (int24 timeWeightedAverageTick) {
        if (secondsAgo == 0) {
            (, timeWeightedAverageTick, , , , , ) = IUniswapV3Pool(pool).slot0();
            return timeWeightedAverageTick;
        }

        uint32[] memory secondsAgos = new uint32[](2);
        secondsAgos[0] = secondsAgo;
        secondsAgos[1] = 0;

        (int56[] memory tickCumulatives, ) = IUniswapV3Pool(pool).observe(secondsAgos);
        
        int56 tickCumulativesDelta = tickCumulatives[1] - tickCumulatives[0];
        timeWeightedAverageTick = int24(tickCumulativesDelta / int56(uint56(secondsAgo)));

        // Always round to negative infinity
        if (tickCumulativesDelta < 0 && (tickCumulativesDelta % int56(uint56(secondsAgo)) != 0)) {
            timeWeightedAverageTick--;
        }
    }

    /// @notice Convert tick to sqrt price ratio
    /// @param tick The tick value
    /// @return sqrtPriceX96 The sqrt price in X96 format
    function getSqrtRatioAtTick(int24 tick) internal pure returns (uint160 sqrtPriceX96) {
        uint256 absTick = tick < 0 ? uint256(-int256(tick)) : uint256(int256(tick));
        require(absTick <= uint256(int256(887272)), 'T');

        uint256 ratio = absTick & 0x1 != 0 ? 0xfffcb933bd6fad37aa2d162d1a594001 : 0x100000000000000000000000000000000;
        if (absTick & 0x2 != 0) ratio = (ratio * 0xfff97272373d413259a46990580e213a) >> 128;
        if (absTick & 0x4 != 0) ratio = (ratio * 0xfff2e50f5f656932ef12357cf3c7fdcc) >> 128;
        if (absTick & 0x8 != 0) ratio = (ratio * 0xffe5caca7e10e4e61c3624eaa0941cd0) >> 128;
        if (absTick & 0x10 != 0) ratio = (ratio * 0xffcb9843d60f6159c9db58835c926644) >> 128;
        if (absTick & 0x20 != 0) ratio = (ratio * 0xff973b41fa98c081472e6896dfb254c0) >> 128;
        if (absTick & 0x40 != 0) ratio = (ratio * 0xff2ea16466c96a3843ec78b326b52861) >> 128;
        if (absTick & 0x80 != 0) ratio = (ratio * 0xfe5dee046a99a2a811c461f1969c3053) >> 128;
        if (absTick & 0x100 != 0) ratio = (ratio * 0xfcbe86c7900a88aedcffc83b479aa3a4) >> 128;
        if (absTick & 0x200 != 0) ratio = (ratio * 0xf987a7253ac413176f2b074cf7815e54) >> 128;
        if (absTick & 0x400 != 0) ratio = (ratio * 0xf3392b0822b70005940c7a398e4b70f3) >> 128;
        if (absTick & 0x800 != 0) ratio = (ratio * 0xe7159475a2c29b7443b29c7fa6e889d9) >> 128;
        if (absTick & 0x1000 != 0) ratio = (ratio * 0xd097f3bdfd2022b8845ad8f792aa5825) >> 128;
        if (absTick & 0x2000 != 0) ratio = (ratio * 0xa9f746462d870fdf8a65dc1f90e061e5) >> 128;
        if (absTick & 0x4000 != 0) ratio = (ratio * 0x70d869a156d2a1b890bb3df62baf32f7) >> 128;
        if (absTick & 0x8000 != 0) ratio = (ratio * 0x31be135f97d08fd981231505542fcfa6) >> 128;
        if (absTick & 0x10000 != 0) ratio = (ratio * 0x9aa508b5b7a84e1c677de54f3e99bc9) >> 128;
        if (absTick & 0x20000 != 0) ratio = (ratio * 0x5d6af8dedb81196699c329225ee604) >> 128;
        if (absTick & 0x40000 != 0) ratio = (ratio * 0x2216e584f5fa1ea926041bedfe98) >> 128;
        if (absTick & 0x80000 != 0) ratio = (ratio * 0x48a170391f7dc42444e8fa2) >> 128;

        if (tick > 0) ratio = type(uint256).max / ratio;

        sqrtPriceX96 = uint160((ratio >> 32) + (ratio % (1 << 32) == 0 ? 0 : 1));
    }

    /// @notice Full precision multiplication
    /// @param a First number
    /// @param b Second number  
    /// @param denominator Denominator for division
    /// @return result The result of (a * b) / denominator
    function mulDiv(uint256 a, uint256 b, uint256 denominator) internal pure returns (uint256 result) {
        uint256 prod0;
        uint256 prod1;
        assembly {
            let mm := mulmod(a, b, not(0))
            prod0 := mul(a, b)
            prod1 := sub(sub(mm, prod0), lt(mm, prod0))
        }

        if (prod1 == 0) {
            require(denominator > 0);
            assembly {
                result := div(prod0, denominator)
            }
            return result;
        }

        require(denominator > prod1);

        uint256 remainder;
        assembly {
            remainder := mulmod(a, b, denominator)
        }
        assembly {
            prod1 := sub(prod1, gt(remainder, prod0))
            prod0 := sub(prod0, remainder)
        }

        uint256 twos = (~denominator + 1) & denominator;
        assembly {
            denominator := div(denominator, twos)
        }

        assembly {
            prod0 := div(prod0, twos)
        }
        assembly {
            twos := add(div(sub(0, twos), twos), 1)
        }
        prod0 |= prod1 * twos;

        uint256 inv = (3 * denominator) ^ 2;
        inv *= 2 - denominator * inv;
        inv *= 2 - denominator * inv;
        inv *= 2 - denominator * inv;
        inv *= 2 - denominator * inv;
        inv *= 2 - denominator * inv;
        inv *= 2 - denominator * inv;

        result = prod0 * inv;
        return result;
    }

    /// @notice Convert tick to price quote
    /// @param tick The tick value
    /// @param baseAmount The base amount to convert
    /// @param baseToken The base token address
    /// @param quoteToken The quote token address
    /// @return quoteAmount The calculated quote amount
    function getQuoteAtTick(
        int24 tick, 
        uint128 baseAmount, 
        address baseToken, 
        address quoteToken
    ) internal pure returns (uint256 quoteAmount) {
        uint160 sqrtRatioX96 = getSqrtRatioAtTick(tick);
        
        // Calculate the price ratio from sqrtRatioX96
        if (sqrtRatioX96 <= type(uint128).max) {
            uint256 ratioX192 = uint256(sqrtRatioX96) * sqrtRatioX96;
            quoteAmount = baseToken < quoteToken
                ? mulDiv(ratioX192, baseAmount, 1 << 192)
                : mulDiv(1 << 192, baseAmount, ratioX192);
        } else {
            uint256 ratioX128 = mulDiv(sqrtRatioX96, sqrtRatioX96, 1 << 64);
            quoteAmount = baseToken < quoteToken
                ? mulDiv(ratioX128, baseAmount, 1 << 128)
                : mulDiv(1 << 128, baseAmount, ratioX128);
        }
    }

    /// @notice Get quote from pool using TWAP
    /// @param pool The pool address
    /// @param baseAmount The base amount
    /// @param baseToken The base token address
    /// @param quoteToken The quote token address
    /// @param secondsAgo TWAP period in seconds
    /// @return quoteAmount The calculated quote amount
    function getQuoteFromPool(
        address pool,
        uint128 baseAmount,
        address baseToken,
        address quoteToken,
        uint32 secondsAgo
    ) internal view returns (uint256 quoteAmount) {
        int24 tick = getTWAPTick(pool, secondsAgo);
        return getQuoteAtTick(tick, baseAmount, baseToken, quoteToken);
    }

    /// @notice Get best quote across multiple fee tiers
    /// @param factory The Uniswap V3 factory address
    /// @param tokenA First token address
    /// @param tokenB Second token address  
    /// @param amountIn Input amount
    /// @param secondsAgo TWAP period in seconds
    /// @return bestQuote The best quote found across all pools
    function getBestQuote(
        address factory,
        address tokenA,
        address tokenB,
        uint128 amountIn,
        uint32 secondsAgo
    ) internal view returns (uint256 bestQuote) {
        bestQuote = 0;
        
        uint16[3] memory feeTiers = getFeeTiers();
        for (uint256 i = 0; i < feeTiers.length; i++) {
            address pool = IUniswapV3Factory(factory).getPool(tokenA, tokenB, uint24(feeTiers[i]));
            if (pool == address(0)) {
                continue;
            }

            // Note: Direct call without try-catch since we're in a library
            // The calling contract should handle exceptions
            uint256 quote = getQuoteFromPool(pool, amountIn, tokenA, tokenB, secondsAgo);
            if (quote > bestQuote) {
                bestQuote = quote;
            }
        }
    }

    /// @notice Get ETH price in USD using TWAP
    /// @param factory The Uniswap V3 factory address
    /// @param weth9 WETH9 token address
    /// @param usdToken USD token address (e.g., USDC)
    /// @param fallbackPrice Fallback price if no pools available
    /// @return ethPriceUSD ETH price in USD
    function getETHPriceUSD(
        address factory,
        address weth9,
        address usdToken,
        uint256 fallbackPrice
    ) internal view returns (uint256 ethPriceUSD) {
        uint256 quote = getBestQuote(
            factory,
            weth9,
            usdToken,
            uint128(1e18), // 1 ETH
            DEFAULT_TWAP_PERIOD
        );
        
        return quote > 0 ? quote : fallbackPrice;
    }

    /// @notice Get token price in ETH using TWAP
    /// @param factory The Uniswap V3 factory address
    /// @param token Token address
    /// @param weth9 WETH9 token address
    /// @param amount Token amount
    /// @return ethAmount ETH amount equivalent
    function getTokenPriceETH(
        address factory,
        address token,
        address weth9,
        uint256 amount
    ) internal view returns (uint256 ethAmount) {
        if (token == weth9) {
            return amount; // 1:1 ratio for WETH to ETH
        }

        return getBestQuote(
            factory,
            token,
            weth9,
            uint128(amount),
            DEFAULT_TWAP_PERIOD
        );
    }
    
    /// @notice Get token price in USD using TWAP
    /// @param factory The Uniswap V3 factory address
    /// @param token Token address
    /// @param amount Token amount
    /// @param weth9 WETH9 token address
    /// @param usdToken USD token address (e.g., USDC)
    /// @return usdAmount USD amount equivalent
    function getTokenPriceUSD(
        address factory,
        address token,
        uint256 amount,
        address weth9,
        address usdToken
    ) internal view returns (uint256 usdAmount) {
        if (token == weth9) {
            // ETH to USD directly
            uint256 ethPriceUSD = getETHPriceUSD(factory, weth9, usdToken, 3000 * 1e6);
            return precisionMul(amount, ethPriceUSD, 1e18);
        } else if (token == usdToken) {
            // USD token (USDC) - return as is
            return amount;
        } else {
            // Other tokens: token -> ETH -> USD
            uint256 ethAmount = getTokenPriceETH(factory, token, weth9, amount);
            if (ethAmount == 0) return 0;
            
            uint256 ethPriceUSD = getETHPriceUSD(factory, weth9, usdToken, 3000 * 1e6);
            return precisionMul(ethAmount, ethPriceUSD, 1e18);
        }
    }
    
    /// @notice High precision multiplication: (a * b) / c
    /// @param a First number
    /// @param b Second number
    /// @param c Divisor
    /// @return result The result of (a * b) / c with high precision
    function precisionMul(uint256 a, uint256 b, uint256 c) internal pure returns (uint256) {
        if (a == 0 || b == 0) return 0;
        require(c > 0, "Division by zero");
        
        uint256 PRECISION_SCALE = 1e18;
        
        // Check if we can safely multiply with precision scale
        if (a <= type(uint256).max / b && (a * b) <= type(uint256).max / PRECISION_SCALE) {
            return (a * b * PRECISION_SCALE) / (c * PRECISION_SCALE);
        }
        
        // Fallback to standard calculation to avoid overflow
        return (a * b) / c;
    }
}"
    },
    "contracts/interfaces/ISteleFundManagerNFT.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

// Mint parameters structure to avoid stack too deep
struct MintParams {
  uint256 fundId;
  uint256 fundCreated;
  uint256 investment;
  uint256 currentTVL;
}

interface ISteleFundManagerNFT {
  // Events
  event ManagerNFTMinted(
    uint256 indexed tokenId, 
    uint256 indexed fundId, 
    address indexed manager,
    uint256 investment,
    uint256 currentTVL,
    int256 returnRate,
    uint256 fundCreated
  );

  event TransferAttemptBlocked(uint256 indexed tokenId, address indexed from, address indexed to, string reason);

  // Main functions
  function mintManagerNFT(MintParams calldata params) external returns (uint256);
  
  // View functions
  function getTokenData(uint256 tokenId) external view returns (
    uint256 fundId,
    uint256 fundCreated,
    uint256 nftMintBlock,
    uint256 investment,
    uint256 currentTVL,
    int256 returnRate
  );
}"
    },
    "contracts/interfaces/ISteleFundSetting.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

interface ISteleFundSetting {
  event SettingCreated();
  event OwnerChanged(address oldOwner, address newOwner);
  event ManagerFeeChanged(uint256 managerFee);
  event AddToken(address indexed token);
  event RemoveToken(address indexed token);
  event MaxTokensChanged(uint256 maxTokens);
  event MaxSlippageChanged(uint256 maxSlippage);

  function owner() external view returns (address);
  function weth9() external view returns (address);
  function usdc() external view returns (address);
  function managerFee() external view returns (uint256);
  function maxTokens() external view returns (uint256);
  function maxSlippage() external view returns (uint256);
  function isInvestable(address _token) external view returns (bool);

  function setOwner(address _owner) external;
  function setManagerFee(uint256 _managerFee) external;
  function setMaxTokens(uint256 _maxTokens) external;
  function setMaxSlippage(uint256 _maxSlippage) external;
  function setToken(address _token) external;
  function resetToken(address _token) external;
}"
    },
    "contracts/interfaces/ISteleFundInfo.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import './IToken.sol';

interface ISteleFundInfo is IToken {
  event InfoCreated();
  event OwnerChanged(address owner, address newOwner);
  event Create(uint256 fundId, address indexed manager);
  event Join(uint256 fundId, address indexed investor);
 
  function owner() external view returns (address _owner);
  function manager(uint256 fundId) external view returns (address _manager);
  function managingFund(address _manager) external view returns (uint256 fundId);
  function fundIdCount() external view returns (uint256 fundCount);
  function fundCreationBlock(uint256 fundId) external view returns (uint256 creationBlock);

  function setOwner(address newOwner) external;
  function create() external returns (uint256 fundId);
  function isJoined(address investor, uint256 fundId) external view returns (bool);
  function join(uint256 fundId) external;

  function getFundTokens(uint256 fundId) external view returns (Token[] memory);
  function getFeeTokens(uint256 fundId) external view returns (Token[] memory);
  function getFundTokenAmount(uint256 fundId, address token) external view returns (uint256);
  function getFeeTokenAmount(uint256 fundId, address token) external view returns (uint256);
  function getFundShare(uint256 fundId) external view returns (uint256);
  function getInvestorShare(uint256 fundId, address investor) external view returns (uint256);

  function increaseFundToken(uint256 fundId, address token, uint256 amount) external;
  function decreaseFundToken(uint256 fundId, address token, uint256 amount) external returns (bool);
  function increaseShare(uint256 fundId, address investor, uint256 amount) external returns (uint256, uint256);
  function decreaseShare(uint256 fundId, address investor, uint256 amount) external returns (uint256, uint256);
  function increaseFeeToken(uint256 fundId, address token, uint256 amount) external;
  function decreaseFeeToken(uint256 fundId, address token, uint256 amount) external returns (bool);
}"
    },
    "contracts/interfaces/ISteleFund.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

interface ISteleFund {
  event Deposit(uint256 fundId, address indexed investor, address token, uint256 amount, uint256 investorShare, uint256 fundShare, uint256 fundAmount, uint256 feeAmount);
  event Withdraw(uint256 fundId, address indexed investor, uint256 percentage, uint256 investorShare, uint256 fundShare);
  event Swap(uint256 fundId, address tokenIn, address tokenOut, uint256 amountIn, uint256 amountOut);
  event WithdrawFee(uint256 fundId, address indexed manager, address token, uint256 amount);
  event ManagerNFTContractSet(address indexed managerNFTContract);
  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  struct SwapParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    uint256 amountIn;
    uint256 amountOutMinimum;
  }

  function owner() external view returns (address);
  function withdraw(uint256 fundId, uint256 percentage) external payable;
  function swap(uint256 fundId, SwapParams[] calldata trades) external;
  function withdrawFee(uint256 fundId, address token, uint256 percentage) external payable;
  function setManagerNFTContract(address _managerNFTContract) external;
  function getManagerNFTContract() external view returns (address);
  function mintManagerNFT(uint256 fundId) external returns (uint256);
}"
    },
    "contracts/interfaces/IToken.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

interface IToken {
  struct Token {
    address token;
    uint256 amount;
  }
}"
    }
  }
}}