// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {MerkleProof} from "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import {IGradientRegistry} from "./interfaces/IGradientRegistry.sol";
import {IGradientMarketMakerFactory} from "./interfaces/IGradientMarketMakerFactory.sol";
import {IUniswapV2Pair} from "./interfaces/IUniswapV2Pair.sol";
import {IUniswapV2Router02} from "./interfaces/IUniswapV2Router.sol";
import {IUniswapV2Factory} from "./interfaces/IUniswapV2Factory.sol";
import {IEventAggregator} from "./interfaces/IEventAggregator.sol";

// Custom errors
error InvalidTokenAddress();
error TokenBlocked();
error OnlyRewardDistributor();
error OnlyOrderbook();
error OnlyFactory();
error AmountZero();
error InsufficientShares();
error InsufficientPoolBalance();
error InsufficientWithdrawal();
error ETHTransferFailed();
error ETHTransferToOrderbookFailed();
error VersionAlreadyProcessed();
error VersionNotAvailable();
error InvalidMerkleProof();
error NoMerkleRootForUpdates();
error InvalidSharesPercentage();
error NoLiquidity();
error NoLiquidityToWithdraw();
error NoSharesToBurn();
error InsufficientSharesToBurn();
error NoRewards();
error NoETHLiquidityOrRewards();
error NoTokenLiquidityOrRewards();
error NoTokenProviderRewards();
error InvalidRecipient();
error InsufficientETHBalance();
error InsufficientTokenBalance();
error ETHWithdrawalFailed();
error TokenWithdrawalFailed();
error RouterNotSet();
error PairDoesNotExist();
error OverflowInETHRewardCalculation();
error OverflowInTokenProviderRewardCalculation();
error OverflowInTokenRewardCalculation();
error ETHAmountMismatch();
error InsufficientTokenLiquidity();
error InsufficientETHLiquidity();
error ETHAmountBelowMinimum();
error TokenAmountBelowMinimum();
error NoETHSent();
error NoLiquidityOrRewards();
error InvalidMinLiquidity();
error InvalidMinTokenLiquidity();

/**
 * @title GradientMarketMakerPoolV2
 * @notice Individual pool contract for a single token - deployed by factory
 * @dev Each token gets its own pool contract, similar to Uniswap V2 pairs
 * @dev Simplified version without epochs - single pool per token
 * @dev Uses merkle tree for efficient bulk position updates after trades
 */
contract GradientMarketMakerPoolV2 is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    // Immutable token address - this pool is dedicated to one token
    IERC20 public immutable token;
    IGradientMarketMakerFactory public immutable factory;

    // Single pool state (no epochs)
    uint256 public totalETH;
    uint256 public totalTokens;

    // Separate structs for ETH and token providers
    struct ETHProvider {
        uint256 ethPosition;
        uint256 rewardDebt;
        uint256 pendingRewards;
        uint256 lastUpdateVersion;
    }

    struct TokenProvider {
        uint256 tokenPosition;
        uint256 rewardDebt;
        uint256 pendingRewards;
        uint256 lastUpdateVersion;
    }

    // Separate mappings for each provider type
    mapping(address => ETHProvider) public ethProviders;
    mapping(address => TokenProvider) public tokenProviders;

    // Reward tracking - separate ETH pools for each provider type
    uint256 public accRewardPerShare; // For ETH providers (ETH rewards)
    uint256 public accTokenRewardPerShare; // For ETH providers (token rewards)
    uint256 public rewardBalance; // ETH rewards for ETH providers
    uint256 public tokenProviderRewardBalance; // ETH rewards for token providers

    uint256 public constant SCALE = 1e18;

    // Token decimals for proper reward calculations
    uint8 public tokenDecimals;

    // Configurable minimum liquidity requirements
    uint256 public minLiquidity = 1e15; // 0.001 ETH minimum (default)
    uint256 public minTokenLiquidity = 1e15; // 0.001 tokens minimum (default)

    // Track totals for this specific token pool
    uint256 public totalEthAdded; // Total ETH added to this pool
    uint256 public totalEthRemoved; // Total ETH removed from this pool
    uint256 public totalTokensAdded; // Total tokens added to this pool
    uint256 public totalTokensRemoved; // Total tokens removed from this pool

    // Uniswap pair address
    address public uniswapPair;

    // Merkle root for LP share updates
    bytes32 public merkleRoot;
    uint256 public currentVersion;
    mapping(uint256 => bytes32) public versionMerkleRoots;

    // Events
    event ETHLiquidityDeposited(
        address indexed user,
        address token,
        uint256 ethAmount
    );

    event TokenLiquidityDeposited(
        address indexed user,
        address token,
        uint256 tokenAmount
    );

    event ETHLiquidityWithdrawn(
        address indexed user,
        address token,
        uint256 ethAmount
    );

    event TokenLiquidityWithdrawn(
        address indexed user,
        address token,
        uint256 tokenAmount
    );

    event PoolFeeDistributed(
        address indexed from,
        uint256 amount,
        address token
    );

    event TokenFeeDistributed(
        address indexed from,
        uint256 amount,
        address token
    );

    event FeeClaimed(address indexed user, uint256 amount, address token);

    event PoolBalanceUpdated(
        address indexed token,
        uint256 newTotalEth,
        uint256 newTotalTokens
    );

    event MinLiquidityUpdated(uint256 newMinLiquidity);
    event MinTokenLiquidityUpdated(uint256 newMinTokenLiquidity);

    event MerkleRootUpdated(uint256 indexed version, bytes32 merkleRoot);
    event MerkleRootUpdateSkipped(uint256 indexed version, string reason);
    event UserPositionUpdated(
        address indexed user,
        uint256 indexed version,
        uint256 newETHPosition,
        uint256 newTokenPosition
    );

    modifier isNotBlocked() {
        if (getRegistry().blockedTokens(address(token))) revert TokenBlocked();
        _;
    }

    modifier onlyRewardDistributor() {
        if (!getRegistry().isRewardDistributor(msg.sender))
            revert OnlyRewardDistributor();
        _;
    }

    modifier onlyOrderbook() {
        if (msg.sender != getRegistry().orderbook()) revert OnlyOrderbook();
        _;
    }

    modifier onlyFactory() {
        if (msg.sender != address(factory)) revert OnlyFactory();
        _;
    }

    constructor(IERC20 _token, address _owner) Ownable(_owner) {
        if (address(_token) == address(0)) revert InvalidTokenAddress();
        if (_owner == address(0)) revert InvalidRecipient();

        token = _token;
        factory = IGradientMarketMakerFactory(msg.sender);

        // Initialize token decimals for proper reward calculations
        tokenDecimals = IERC20Metadata(address(_token)).decimals();
    }

    /**
     * @notice Receive ETH for reward distribution
     */
    receive() external payable {}

    // =============================== INTERNAL FUNCTIONS ===============================

    /**
     * @notice Get the registry address from the factory
     * @return registryAddress Address of the GradientRegistry
     */
    function getRegistry() public view returns (IGradientRegistry) {
        return IGradientRegistry(factory.getRegistry());
    }

    /**
     * @notice Get the event aggregator address from the factory
     * @return eventAggregatorAddress Address of the EventAggregator
     */
    function getEventAggregator() public view returns (IEventAggregator) {
        return IEventAggregator(factory.getEventAggregator());
    }

    /**
     * @notice Updates ETH pool rewards before modifying state
     * @param ethAmount Amount of ETH to distribute as rewards to ETH providers
     */
    function _updatePoolRewards(uint256 ethAmount) internal {
        if (ethAmount == 0) revert AmountZero();

        // Distribute ETH rewards to ETH providers only
        if (totalETH > 0) {
            uint256 newAccRewardPerShare = accRewardPerShare +
                ((ethAmount * SCALE) / totalETH);
            if (newAccRewardPerShare < accRewardPerShare)
                revert OverflowInETHRewardCalculation();
            accRewardPerShare = newAccRewardPerShare;
        }

        // Track ETH rewards
        rewardBalance += ethAmount;
    }

    /**
     * @notice Update token rewards for token providers
     * @param tokenAmount Amount of tokens to distribute as rewards (in token decimals)
     */
    function _updateTokenRewards(uint256 tokenAmount) internal {
        if (tokenAmount == 0) revert AmountZero();

        // Distribute token rewards to token providers only
        if (totalTokens > 0) {
            // Normalize token amount to 18 decimals for consistent calculations
            uint256 normalizedTokenAmount = _normalizeTo18Decimals(tokenAmount);
            uint256 normalizedTotalTokens = _normalizeTo18Decimals(totalTokens);

            uint256 newAccTokenRewardPerShare = accTokenRewardPerShare +
                ((normalizedTokenAmount * SCALE) / normalizedTotalTokens);
            if (newAccTokenRewardPerShare < accTokenRewardPerShare)
                revert OverflowInTokenRewardCalculation();
            accTokenRewardPerShare = newAccTokenRewardPerShare;
        }

        // Track token rewards
        totalTokensRemoved += tokenAmount;
    }

    /**
     * @notice Normalize token amount to 18 decimals for consistent calculations
     * @param amount Amount in token decimals
     * @return uint256 Amount normalized to 18 decimals
     */
    function _normalizeTo18Decimals(
        uint256 amount
    ) internal view returns (uint256) {
        if (tokenDecimals == 18) {
            return amount;
        } else if (tokenDecimals < 18) {
            return amount * (10 ** (18 - tokenDecimals));
        } else {
            return amount / (10 ** (tokenDecimals - 18));
        }
    }

    /**
     * @notice Denormalize from 18 decimals to token decimals
     * @param amount Amount in 18 decimals
     * @return uint256 Amount in token decimals
     */
    function _denormalizeFrom18Decimals(
        uint256 amount
    ) internal view returns (uint256) {
        if (tokenDecimals == 18) {
            return amount;
        } else if (tokenDecimals < 18) {
            return amount / (10 ** (18 - tokenDecimals));
        } else {
            return amount * (10 ** (tokenDecimals - 18));
        }
    }

    /**
     * @notice Update merkle root after trade execution
     * @param newMerkleRoot New merkle root to set
     */
    function _updateMerkleRootAfterTrade(bytes32 newMerkleRoot) internal {
        if (newMerkleRoot != bytes32(0)) {
            currentVersion++;
            merkleRoot = newMerkleRoot;
            versionMerkleRoots[currentVersion] = newMerkleRoot;

            // Emit to EventAggregator instead of local event
            getEventAggregator().emitMerkleRootUpdated(
                currentVersion,
                newMerkleRoot
            );

            emit MerkleRootUpdated(currentVersion, newMerkleRoot);
        }
    }

    /**
     * @notice Verify merkle proof for user position update
     * @param user User address
     * @param proof Merkle proof
     * @param newETHPosition New ETH position (actual ETH amount)
     * @param newTokenPosition New token position (actual token amount)
     * @param ethRewardsToAdd Off-chain calculated total ETH rewards
     * @param tokenRewardsToAdd Off-chain calculated total token provider rewards
     * @return isValid Whether the proof is valid
     */
    function _verifyMerkleProof(
        address user,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) internal view returns (bool isValid) {
        bytes32 leaf = keccak256(
            abi.encodePacked(
                user,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            )
        );

        // Special handling for single provider case
        if (proof.length == 0) {
            // For single provider, verify that the leaf equals the merkle root
            return leaf == merkleRoot;
        }

        // For multiple providers, use standard merkle proof verification
        return MerkleProof.verify(proof, merkleRoot, leaf);
    }

    /**
     * @notice Update ETH provider position using merkle proof
     * @param user User address
     * @param newETHPosition New ETH position (actual ETH amount)
     */
    function _updateETHProviderPosition(
        address user,
        uint256 newETHPosition,
        uint256 totalRewards
    ) internal {
        ethProviders[user].pendingRewards = totalRewards;

        // Update user's last update version for ETH provider
        ethProviders[user].lastUpdateVersion = currentVersion;

        // Update ETH provider position
        ethProviders[user].ethPosition = newETHPosition;

        // Update reward debt for the new position to ensure accurate future reward calculations
        ethProviders[user].rewardDebt =
            (newETHPosition * accRewardPerShare) /
            SCALE;
    }

    /**
     * @notice Update token provider position using merkle proof
     * @param user User address
     * @param newTokenPosition New token position (actual token amount)
     */
    function _updateTokenProviderPosition(
        address user,
        uint256 newTokenPosition,
        uint256 totalRewards
    ) internal {
        tokenProviders[user].pendingRewards = totalRewards;

        // Update user's last update version for token provider
        tokenProviders[user].lastUpdateVersion = currentVersion;

        // Update token provider position
        tokenProviders[user].tokenPosition = newTokenPosition;

        // Update reward debt for the new position to ensure accurate future reward calculations
        uint256 normalizedTokenPosition = _normalizeTo18Decimals(
            newTokenPosition
        );
        tokenProviders[user].rewardDebt =
            (normalizedTokenPosition * accTokenRewardPerShare) /
            SCALE;
    }

    /**
     * @notice Update both ETH and token provider positions using merkle proof
     * @param user User address
     * @param newETHPosition New ETH position (actual ETH amount)
     * @param newTokenPosition New token position (actual token amount)
     */
    function _updateUserPosition(
        address user,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethTotalRewards,
        uint256 tokenTotalRewards
    ) internal {
        // Update both provider positions
        _updateETHProviderPosition(user, newETHPosition, ethTotalRewards);
        _updateTokenProviderPosition(user, newTokenPosition, tokenTotalRewards);

        // Emit event for position update
        emit UserPositionUpdated(
            user,
            currentVersion,
            newETHPosition,
            newTokenPosition
        );
    }

    // =============================== INTERNAL HELPER FUNCTIONS ===============================

    /**
     * @notice Check if user needs position update for either asset type
     * @param user User address to check
     * @return needsUpdate True if user needs position update
     */
    function _needsPositionUpdate(address user) internal view returns (bool) {
        return
            (ethProviders[user].ethPosition > 0 &&
                ethProviders[user].lastUpdateVersion < currentVersion) ||
            (tokenProviders[user].tokenPosition > 0 &&
                tokenProviders[user].lastUpdateVersion < currentVersion) ||
            // Also check if user has pending rewards that need position update
            (ethProviders[user].pendingRewards > 0 &&
                ethProviders[user].lastUpdateVersion < currentVersion) ||
            (tokenProviders[user].pendingRewards > 0 &&
                tokenProviders[user].lastUpdateVersion < currentVersion);
    }

    // =============================== PUBLIC FUNCTIONS ===============================

    /**
     * @notice Add ETH liquidity to the pool (internal function)
     * @param user User address to add liquidity for
     * @param ethAmount Amount of ETH to deposit
     */
    function _addETHLiquidity(address user, uint256 ethAmount) internal {
        // Initialize Uniswap pair if not set
        if (uniswapPair == address(0)) {
            uniswapPair = getPairAddress();
        }
        if (uniswapPair == address(0)) revert PairDoesNotExist();

        // Calculate pending rewards before update
        if (ethProviders[user].ethPosition > 0) {
            uint256 pendingReward = (ethProviders[user].ethPosition *
                accRewardPerShare) /
                SCALE -
                ethProviders[user].rewardDebt;
            ethProviders[user].pendingRewards += pendingReward;
        }

        ethProviders[user].ethPosition += ethAmount;

        // Initialize lastUpdateVersion for first-time liquidity providers
        if (ethProviders[user].lastUpdateVersion == 0) {
            ethProviders[user].lastUpdateVersion = currentVersion;
        }

        // Update reward debt
        ethProviders[user].rewardDebt =
            (ethProviders[user].ethPosition * accRewardPerShare) /
            SCALE;

        totalETH += ethAmount;
        totalEthAdded += ethAmount;

        // Emit to EventAggregator
        getEventAggregator().emitLiquidityEvent(
            user,
            address(token),
            0, // ETH_ADD
            ethAmount
        );

        // Emit local event
        emit ETHLiquidityDeposited(user, address(token), ethAmount);
    }

    /**
     * @notice Add token liquidity to the pool (internal function)
     * @param user User address to add liquidity for
     * @param tokenAmount Amount of tokens to deposit
     */
    function _addTokenLiquidity(address user, uint256 tokenAmount) internal {
        // Initialize Uniswap pair if not set
        if (uniswapPair == address(0)) {
            uniswapPair = getPairAddress();
        }
        if (uniswapPair == address(0)) revert PairDoesNotExist();

        // Transfer tokens from user
        token.safeTransferFrom(msg.sender, address(this), tokenAmount);

        // Calculate pending rewards before update
        if (tokenProviders[user].tokenPosition > 0) {
            uint256 pendingReward = (tokenProviders[user].tokenPosition *
                accTokenRewardPerShare) /
                SCALE -
                tokenProviders[user].rewardDebt;
            tokenProviders[user].pendingRewards += pendingReward;
        }

        tokenProviders[user].tokenPosition += tokenAmount;

        // Initialize lastUpdateVersion for first-time liquidity providers
        if (tokenProviders[user].lastUpdateVersion == 0) {
            tokenProviders[user].lastUpdateVersion = currentVersion;
        }

        // Update reward debt
        uint256 normalizedTokenPosition = _normalizeTo18Decimals(
            tokenProviders[user].tokenPosition
        );
        tokenProviders[user].rewardDebt =
            (normalizedTokenPosition * accTokenRewardPerShare) /
            SCALE;

        totalTokens += tokenAmount;
        totalTokensAdded += tokenAmount;

        // Emit to EventAggregator
        getEventAggregator().emitLiquidityEvent(
            user,
            address(token),
            2, // TOKEN_ADD
            tokenAmount
        );

        // Emit local event
        emit TokenLiquidityDeposited(user, address(token), tokenAmount);
    }

    /**
     * @notice Add ETH liquidity to the pool for a specific user
     * @param user User address to add liquidity for
     */
    function addETHLiquidityForUser(
        address user
    ) external payable isNotBlocked nonReentrant onlyFactory {
        if (msg.value < minLiquidity) revert ETHAmountBelowMinimum();
        if (user == address(0)) revert InvalidRecipient();
        _addETHLiquidity(user, msg.value);
    }

    /**
     * @notice Add token liquidity to the pool for a specific user
     * @param user User address to add liquidity for
     * @param tokenAmount Amount of tokens to deposit
     */
    function addTokenLiquidityForUser(
        address user,
        uint256 tokenAmount
    ) external isNotBlocked nonReentrant onlyFactory {
        if (tokenAmount < minTokenLiquidity) revert TokenAmountBelowMinimum();
        if (user == address(0)) revert InvalidRecipient();
        _addTokenLiquidity(user, tokenAmount);
    }

    /**
     * @notice Remove liquidity with optional position update
     * @param shares Percentage of pool to withdraw (in basis points, 10000 = 100%)
     * @param minEthAmount Minimum amount of ETH to receive
     * @param minTokenAmount Minimum amount of tokens to receive
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function removeLiquidityWithProof(
        uint256 shares,
        uint256 minEthAmount,
        uint256 minTokenAmount,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external isNotBlocked nonReentrant {
        if (shares <= 0 || shares > 10000) revert InvalidSharesPercentage();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Then remove liquidity
        _removeETHLiquidity(shares, minEthAmount);
        _removeTokenLiquidity(shares, minTokenAmount);
    }

    /**
     * @notice Remove ETH liquidity with optional position update
     * @param shares Percentage of pool to withdraw (in basis points, 10000 = 100%)
     * @param minEthAmount Minimum amount of ETH to receive
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function removeETHLiquidityWithProof(
        uint256 shares,
        uint256 minEthAmount,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external isNotBlocked nonReentrant {
        if (shares <= 0 || shares > 10000) revert InvalidSharesPercentage();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Then remove ETH liquidity
        _removeETHLiquidity(shares, minEthAmount);
    }

    /**
     * @notice Remove token liquidity with optional position update
     * @param shares Percentage of pool to withdraw (in basis points, 10000 = 100%)
     * @param minTokenAmount Minimum amount of tokens to receive
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function removeTokenLiquidityWithProof(
        uint256 shares,
        uint256 minTokenAmount,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external isNotBlocked nonReentrant {
        if (shares <= 0 || shares > 10000) revert InvalidSharesPercentage();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Then remove token liquidity
        _removeTokenLiquidity(shares, minTokenAmount);
    }

    // =============================== REMOVAL FUNCTIONS ===============================

    /**
     * @notice Remove ETH liquidity from the pool
     * @param shares Percentage of pool to withdraw (in basis points, 10000 = 100%)
     * @param minEthAmount Minimum amount of ETH to receive
     */
    function _removeETHLiquidity(
        uint256 shares,
        uint256 minEthAmount
    ) internal {
        if (totalETH == 0) revert NoLiquidity();
        if (ethProviders[msg.sender].ethPosition == 0)
            revert NoLiquidityToWithdraw();

        // Calculate pending rewards before withdrawing
        uint256 pendingReward = (ethProviders[msg.sender].ethPosition *
            accRewardPerShare) /
            SCALE -
            ethProviders[msg.sender].rewardDebt;
        ethProviders[msg.sender].pendingRewards += pendingReward;

        // Calculate amount to withdraw based on withdrawal percentage
        uint256 amountToWithdraw = (ethProviders[msg.sender].ethPosition *
            shares) / 10000;
        if (amountToWithdraw == 0) revert NoSharesToBurn();

        // Ensure we don't withdraw more than the user actually has (prevent underflow)
        if (amountToWithdraw > ethProviders[msg.sender].ethPosition) {
            amountToWithdraw = ethProviders[msg.sender].ethPosition;
        }
        if (amountToWithdraw > totalETH) revert InsufficientPoolBalance();

        // Update balances
        ethProviders[msg.sender].ethPosition -= amountToWithdraw;

        // Update reward debt
        ethProviders[msg.sender].rewardDebt =
            (ethProviders[msg.sender].ethPosition * accRewardPerShare) /
            SCALE;

        totalETH -= amountToWithdraw;
        totalEthRemoved += amountToWithdraw;

        // Transfer ETH back to user
        if (amountToWithdraw < minEthAmount) revert InsufficientWithdrawal();
        (bool success, ) = payable(msg.sender).call{value: amountToWithdraw}(
            ""
        );
        if (!success) revert ETHTransferFailed();

        // Emit to EventAggregator instead of local event
        getEventAggregator().emitLiquidityEvent(
            msg.sender,
            address(token),
            1, // ETH_REMOVE
            amountToWithdraw
        );

        emit ETHLiquidityWithdrawn(
            msg.sender,
            address(token),
            amountToWithdraw
        );
    }

    /**
     * @notice Remove token liquidity from the pool
     * @param shares Percentage of pool to withdraw (in basis points, 10000 = 100%)
     * @param minTokenAmount Minimum amount of tokens to receive
     */
    function _removeTokenLiquidity(
        uint256 shares,
        uint256 minTokenAmount
    ) internal {
        if (totalTokens == 0) revert NoLiquidity();
        if (tokenProviders[msg.sender].tokenPosition == 0)
            revert NoLiquidityToWithdraw();

        // Calculate pending rewards before withdrawing
        uint256 pendingReward = (tokenProviders[msg.sender].tokenPosition *
            accTokenRewardPerShare) /
            SCALE -
            tokenProviders[msg.sender].rewardDebt;
        tokenProviders[msg.sender].pendingRewards += pendingReward;

        // Calculate amount to withdraw based on withdrawal percentage
        uint256 amountToWithdraw = (tokenProviders[msg.sender].tokenPosition *
            shares) / 10000;
        if (amountToWithdraw == 0) revert NoSharesToBurn();

        // Ensure we don't withdraw more than the user actually has (prevent underflow)
        if (amountToWithdraw > tokenProviders[msg.sender].tokenPosition) {
            amountToWithdraw = tokenProviders[msg.sender].tokenPosition;
        }

        if (amountToWithdraw > totalTokens) revert InsufficientPoolBalance();

        // Update balances
        tokenProviders[msg.sender].tokenPosition -= amountToWithdraw;

        // Update reward debt
        tokenProviders[msg.sender].rewardDebt =
            (tokenProviders[msg.sender].tokenPosition *
                accTokenRewardPerShare) /
            SCALE;

        totalTokens -= amountToWithdraw;
        totalTokensRemoved += amountToWithdraw;

        // Transfer tokens back to user
        if (amountToWithdraw < minTokenAmount) revert InsufficientWithdrawal();
        if (amountToWithdraw > 0) {
            token.safeTransfer(msg.sender, amountToWithdraw);
        }

        // Emit to EventAggregator instead of local event
        getEventAggregator().emitLiquidityEvent(
            msg.sender,
            address(token),
            3, // TOKEN_REMOVE
            amountToWithdraw
        );

        emit TokenLiquidityWithdrawn(
            msg.sender,
            address(token),
            amountToWithdraw
        );
    }

    // =============================== ORDER EXECUTION FUNCTIONS ===============================

    /**
     * @notice Execute buy order - Orderbook sends ETH, receives tokens
     * @param ethAmount Amount of ETH sent by orderbook
     * @param tokenAmount Amount of tokens to send to orderbook
     * @param newMerkleRoot New merkle root to update after trade
     */
    function executeBuyOrder(
        uint256 ethAmount,
        uint256 tokenAmount,
        bytes32 newMerkleRoot
    ) external payable isNotBlocked onlyOrderbook {
        _executeBuyOrder(ethAmount, tokenAmount, newMerkleRoot);
    }

    /**
     * @notice Internal function to execute buy order
     * @param ethAmount Amount of ETH sent by orderbook
     * @param tokenAmount Amount of tokens to send to orderbook
     * @param newMerkleRoot New merkle root to update after trade
     */
    function _executeBuyOrder(
        uint256 ethAmount,
        uint256 tokenAmount,
        bytes32 newMerkleRoot
    ) internal {
        if (ethAmount == 0) revert AmountZero();
        if (tokenAmount == 0) revert AmountZero();
        if (msg.value != ethAmount) revert ETHAmountMismatch();

        if (totalTokens < tokenAmount) revert InsufficientTokenLiquidity();

        // Pool provides tokens to orderbook
        totalTokens -= tokenAmount;
        totalTokensRemoved += tokenAmount;
        totalETH += msg.value; // Update totalETH with incoming ETH from orderbook
        totalEthAdded += msg.value;

        // Transfer tokens to orderbook
        if (tokenAmount > 0) {
            token.safeTransfer(msg.sender, tokenAmount);
        }

        // Update merkle root if provided
        _updateMerkleRootAfterTrade(newMerkleRoot);

        // Emit trade event to EventAggregator
        getEventAggregator().emitTradeExecuted(
            msg.sender, // orderbook address
            0, // BUY trade
            ethAmount,
            tokenAmount
        );

        emit PoolBalanceUpdated(address(token), totalETH, totalTokens);
    }

    /**
     * @notice Execute sell order - Orderbook sends tokens, receives ETH
     * @param ethAmount Amount of ETH to send to orderbook
     * @param tokenAmount Amount of tokens sent by orderbook
     * @param newMerkleRoot New merkle root to update after trade
     */
    function executeSellOrder(
        uint256 ethAmount,
        uint256 tokenAmount,
        bytes32 newMerkleRoot
    ) external isNotBlocked onlyOrderbook {
        _executeSellOrder(ethAmount, tokenAmount, newMerkleRoot);
    }

    /**
     * @notice Internal function to execute sell order
     * @param ethAmount Amount of ETH to send to orderbook
     * @param tokenAmount Amount of tokens sent by orderbook
     * @param newMerkleRoot New merkle root to update after trade
     */
    function _executeSellOrder(
        uint256 ethAmount,
        uint256 tokenAmount,
        bytes32 newMerkleRoot
    ) internal {
        if (ethAmount == 0) revert AmountZero();
        if (tokenAmount == 0) revert AmountZero();

        if (totalETH < ethAmount) revert InsufficientETHLiquidity();

        // Transfer tokens from orderbook to market maker pool
        token.safeTransferFrom(msg.sender, address(this), tokenAmount);

        // Pool provides ETH to orderbook
        totalETH -= ethAmount;
        totalEthRemoved += ethAmount;
        totalTokens += tokenAmount;
        totalTokensAdded += tokenAmount;

        // Transfer ETH to orderbook
        (bool success, ) = payable(msg.sender).call{value: ethAmount}("");
        if (!success) revert ETHTransferToOrderbookFailed();

        // Update merkle root if provided
        _updateMerkleRootAfterTrade(newMerkleRoot);

        // Emit trade event to EventAggregator
        getEventAggregator().emitTradeExecuted(
            msg.sender, // orderbook address
            1, // SELL trade
            ethAmount,
            tokenAmount
        );

        emit PoolBalanceUpdated(address(token), totalETH, totalTokens);
    }

    /**
     * @notice Update user position using merkle proof
     * @param version Version of the merkle root
     * @param proof Merkle proof for the user's new position
     * @param newETHPosition New ETH position (actual ETH amount)
     * @param newTokenPosition New token position (actual token amount)
     */
    function updateUserPosition(
        uint256 version,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external nonReentrant {
        // Check if version is newer than the last update for either provider type
        if (
            version <= ethProviders[msg.sender].lastUpdateVersion ||
            version <= tokenProviders[msg.sender].lastUpdateVersion
        ) revert VersionAlreadyProcessed();
        if (version > currentVersion) revert VersionNotAvailable();

        // Verify merkle proof
        if (
            !_verifyMerkleProof(
                msg.sender,
                proof,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            )
        ) revert InvalidMerkleProof();

        // Update user position
        _updateUserPosition(
            msg.sender,
            newETHPosition,
            newTokenPosition,
            ethRewardsToAdd,
            tokenRewardsToAdd
        );
    }

    // =============================== REWARD DISTRIBUTION FUNCTIONS ===============================

    /**
     * @notice Distributes fee distribution from orderbook to be distributed to market makers
     */
    function distributePoolFee() external payable onlyRewardDistributor {
        if (msg.value == 0) revert NoETHSent();
        totalEthAdded += msg.value;
        _updatePoolRewards(msg.value);

        emit PoolFeeDistributed(msg.sender, msg.value, address(token));
    }

    /**
     * @notice Distributes token fees to token providers only
     * @param tokenAmount Amount of tokens to distribute as fees
     */
    function distributeTokenFee(
        uint256 tokenAmount
    ) external onlyRewardDistributor {
        if (tokenAmount == 0) revert AmountZero();

        // Transfer tokens from orderbook to this contract
        IERC20(token).safeTransferFrom(msg.sender, address(this), tokenAmount);

        // Update token rewards using the same pattern as distributePoolFee
        totalTokensAdded += tokenAmount;
        _updateTokenRewards(tokenAmount);

        emit TokenFeeDistributed(msg.sender, tokenAmount, address(token));
    }

    // =============================== USER FUNCTIONS ===============================

    /**
     * @notice Add ETH liquidity to the pool with optional position update
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function addETHLiquidityWithProof(
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external payable isNotBlocked nonReentrant {
        if (msg.value < minLiquidity) revert ETHAmountBelowMinimum();

        // Check if user needs position update - only if they have existing liquidity
        if (_needsPositionUpdate(msg.sender)) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Then add ETH liquidity
        _addETHLiquidity(msg.sender, msg.value);
    }

    /**
     * @notice Add token liquidity to the pool with optional position update
     * @param tokenAmount Amount of tokens to deposit
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function addTokenLiquidityWithProof(
        uint256 tokenAmount,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external isNotBlocked nonReentrant {
        if (tokenAmount < minTokenLiquidity) revert TokenAmountBelowMinimum();

        // Check if user needs position update - only if they have existing liquidity
        if (_needsPositionUpdate(msg.sender)) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Then add token liquidity
        _addTokenLiquidity(msg.sender, tokenAmount);
    }

    /**
     * @notice Add liquidity to the pool with optional position update
     * @param tokenAmount Amount of tokens to deposit
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function addLiquidityWithProof(
        uint256 tokenAmount,
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external payable isNotBlocked nonReentrant {
        if (msg.value < minLiquidity) revert ETHAmountBelowMinimum();
        if (tokenAmount < minTokenLiquidity) revert TokenAmountBelowMinimum();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Then add liquidity
        _addETHLiquidity(msg.sender, msg.value);
        _addTokenLiquidity(msg.sender, tokenAmount);
    }

    /**
     * @notice Claim rewards with optional position update
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function claimRewardsWithProof(
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external nonReentrant {
        uint256 totalUserPosition = ethProviders[msg.sender].ethPosition +
            tokenProviders[msg.sender].tokenPosition;
        if (
            totalUserPosition == 0 &&
            ethProviders[msg.sender].pendingRewards == 0 &&
            tokenProviders[msg.sender].pendingRewards == 0
        ) revert NoLiquidityOrRewards();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Calculate ETH rewards after position update (if any)
        uint256 ethRewards = 0;
        if (ethProviders[msg.sender].ethPosition > 0) {
            uint256 ethAccumulated = (ethProviders[msg.sender].ethPosition *
                accRewardPerShare) / SCALE;
            ethRewards = ethAccumulated - ethProviders[msg.sender].rewardDebt;
        }
        // Always add pending rewards
        ethRewards += ethProviders[msg.sender].pendingRewards;

        // Calculate token rewards from token positions after position update (if any)
        uint256 tokenProviderRewards = 0;
        if (tokenProviders[msg.sender].tokenPosition > 0) {
            uint256 normalizedTokenPosition = _normalizeTo18Decimals(
                tokenProviders[msg.sender].tokenPosition
            );
            uint256 tokenAccumulated = (normalizedTokenPosition *
                accTokenRewardPerShare) / SCALE;
            tokenProviderRewards =
                tokenAccumulated -
                tokenProviders[msg.sender].rewardDebt;
        }
        // Always add pending rewards
        tokenProviderRewards += tokenProviders[msg.sender].pendingRewards;

        uint256 totalRewards = ethRewards + tokenProviderRewards;
        if (totalRewards == 0) revert NoRewards();

        // Update reward debt for both asset types
        if (ethProviders[msg.sender].ethPosition > 0) {
            ethProviders[msg.sender].rewardDebt =
                (ethProviders[msg.sender].ethPosition * accRewardPerShare) /
                SCALE;
        }
        if (tokenProviders[msg.sender].tokenPosition > 0) {
            uint256 normalizedTokenPosition = _normalizeTo18Decimals(
                tokenProviders[msg.sender].tokenPosition
            );
            tokenProviders[msg.sender].rewardDebt =
                (normalizedTokenPosition * accTokenRewardPerShare) /
                SCALE;
        }

        // Clear pending rewards
        ethProviders[msg.sender].pendingRewards = 0;
        tokenProviders[msg.sender].pendingRewards = 0;

        // Transfer ETH rewards
        if (ethRewards > 0) {
            totalEthRemoved += ethRewards;
            (bool success, ) = payable(msg.sender).call{value: ethRewards}("");
            if (!success) revert ETHWithdrawalFailed();
        }

        // Transfer token rewards
        if (tokenProviderRewards > 0) {
            // Denormalize rewards from 18 decimals back to token decimals
            uint256 denormalizedRewards = _denormalizeFrom18Decimals(
                tokenProviderRewards
            );
            token.safeTransfer(msg.sender, denormalizedRewards);
        }

        // Emit events to EventAggregator
        if (ethRewards > 0) {
            getEventAggregator().emitETHRewardsClaimed(
                msg.sender,
                address(token),
                ethRewards
            );
        }
        if (tokenProviderRewards > 0) {
            uint256 denormalizedRewards = _denormalizeFrom18Decimals(
                tokenProviderRewards
            );
            getEventAggregator().emitTokenRewardsClaimed(
                msg.sender,
                address(token),
                denormalizedRewards
            );
        }

        emit FeeClaimed(msg.sender, totalRewards, address(token));
    }

    /**
     * @notice Claim only ETH rewards for ETH liquidity providers with optional position update
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function claimETHRewardsWithProof(
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external nonReentrant {
        if (ethProviders[msg.sender].pendingRewards == 0)
            revert NoETHLiquidityOrRewards();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Calculate ETH rewards from ETH positions only
        uint256 ethRewards = 0;
        if (ethProviders[msg.sender].ethPosition > 0) {
            uint256 ethAccumulated = (ethProviders[msg.sender].ethPosition *
                accRewardPerShare) / SCALE;
            ethRewards = ethAccumulated - ethProviders[msg.sender].rewardDebt;
        }
        // Always add pending rewards
        ethRewards += ethProviders[msg.sender].pendingRewards;

        if (ethRewards == 0) revert NoRewards();

        // Update reward debt
        if (ethProviders[msg.sender].ethPosition > 0) {
            ethProviders[msg.sender].rewardDebt =
                (ethProviders[msg.sender].ethPosition * accRewardPerShare) /
                SCALE;
        }

        // Clear pending rewards
        ethProviders[msg.sender].pendingRewards = 0;

        // Transfer ETH rewards
        totalEthRemoved += ethRewards;
        (bool success, ) = payable(msg.sender).call{value: ethRewards}("");
        if (!success) revert ETHWithdrawalFailed();

        // Emit to EventAggregator instead of local event
        getEventAggregator().emitETHRewardsClaimed(
            msg.sender,
            address(token),
            ethRewards
        );

        emit FeeClaimed(msg.sender, ethRewards, address(token));
    }

    /**
     * @notice Claim only ETH rewards for token liquidity providers with optional position update
     * @param proof Merkle proof for position update (required if user has pending updates)
     * @param newETHPosition New ETH position (required if proof provided)
     * @param newTokenPosition New token position (required if proof provided)
     */
    function claimTokenRewardsWithProof(
        bytes32[] calldata proof,
        uint256 newETHPosition,
        uint256 newTokenPosition,
        uint256 ethRewardsToAdd,
        uint256 tokenRewardsToAdd
    ) external nonReentrant {
        if (tokenProviders[msg.sender].pendingRewards == 0)
            revert NoTokenLiquidityOrRewards();

        // Check if user needs position update for either asset type - only if they have existing liquidity
        bool needsUpdate = _needsPositionUpdate(msg.sender);

        if (needsUpdate) {
            // Proof is required - validate parameters
            if (merkleRoot == bytes32(0)) revert NoMerkleRootForUpdates();

            // Verify merkle proof
            if (
                !_verifyMerkleProof(
                    msg.sender,
                    proof,
                    newETHPosition,
                    newTokenPosition,
                    ethRewardsToAdd,
                    tokenRewardsToAdd
                )
            ) revert InvalidMerkleProof();

            // Update user position first
            _updateUserPosition(
                msg.sender,
                newETHPosition,
                newTokenPosition,
                ethRewardsToAdd,
                tokenRewardsToAdd
            );
        }

        // Calculate token rewards from token positions only
        uint256 tokenProviderRewards = 0;
        if (tokenProviders[msg.sender].tokenPosition > 0) {
            // Normalize token position to 18 decimals for consistent calculation
            uint256 normalizedTokenPosition = _normalizeTo18Decimals(
                tokenProviders[msg.sender].tokenPosition
            );
            uint256 tokenAccumulated = (normalizedTokenPosition *
                accTokenRewardPerShare) / SCALE;
            tokenProviderRewards =
                tokenAccumulated -
                tokenProviders[msg.sender].rewardDebt;
        }
        // Always add pending rewards
        tokenProviderRewards += tokenProviders[msg.sender].pendingRewards;

        if (tokenProviderRewards == 0) revert NoTokenProviderRewards();

        // Update reward debt
        if (tokenProviders[msg.sender].tokenPosition > 0) {
            uint256 normalizedTokenPosition = _normalizeTo18Decimals(
                tokenProviders[msg.sender].tokenPosition
            );
            tokenProviders[msg.sender].rewardDebt =
                (normalizedTokenPosition * accTokenRewardPerShare) /
                SCALE;
        }

        // Clear pending rewards
        tokenProviders[msg.sender].pendingRewards = 0;

        // Transfer token rewards
        uint256 denormalizedRewards = _denormalizeFrom18Decimals(
            tokenProviderRewards
        );
        totalTokensRemoved += denormalizedRewards;
        token.safeTransfer(msg.sender, denormalizedRewards);

        // Emit to EventAggregator instead of local event
        getEventAggregator().emitTokenRewardsClaimed(
            msg.sender,
            address(token),
            denormalizedRewards
        );

        emit FeeClaimed(msg.sender, denormalizedRewards, address(token));
    }

    // =============================== VIEW FUNCTIONS ===============================

    /**
     * @notice Get the Uniswap V2 pair address for this token
     * @return pairAddress Address of the Uniswap V2 pair
     */
    function getPairAddress() public view returns (address pairAddress) {
        address routerAddress = getRegistry().router();
        if (routerAddress == address(0)) revert RouterNotSet();

        IUniswapV2Router02 router = IUniswapV2Router02(routerAddress);
        address factoryAddress = router.factory();
        address weth = router.WETH();

        IUniswapV2Factory factoryContract = IUniswapV2Factory(factoryAddress);
        return factoryContract.getPair(address(token), weth);
    }

    /**
     * @notice Get the reserves for this token pair
     * @return reserveETH ETH reserve amount
     * @return reserveToken Token reserve amount
     */
    function getReserves()
        public
        view
        returns (uint256 reserveETH, uint256 reserveToken)
    {
        address pairAddress = getPairAddress();
        if (pairAddress == address(0)) revert PairDoesNotExist();

        (uint112 reserve0, uint112 reserve1, ) = IUniswapV2Pair(pairAddress)
            .getReserves();
        address token0 = IUniswapV2Pair(pairAddress).token0();

        (reserveETH, reserveToken) = token0 == address(token)
            ? (reserve1, reserve0)
            : (reserve0, reserve1);
    }

    // =============================== OWNER FUNCTIONS ===============================

    /**
     * @notice Set minimum ETH liquidity requirement
     * @param _minLiquidity New minimum ETH liquidity amount
     */
    function setMinLiquidity(uint256 _minLiquidity) external onlyOwner {
        if (_minLiquidity == 0) revert InvalidMinLiquidity();
        minLiquidity = _minLiquidity;
        emit MinLiquidityUpdated(_minLiquidity);
    }

    /**
     * @notice Set minimum token liquidity requirement
     * @param _minTokenLiquidity New minimum token liquidity amount
     */
    function setMinTokenLiquidity(
        uint256 _minTokenLiquidity
    ) external onlyOwner {
        if (_minTokenLiquidity == 0) revert InvalidMinTokenLiquidity();
        minTokenLiquidity = _minTokenLiquidity;
        emit MinTokenLiquidityUpdated(_minTokenLiquidity);
    }

    // =============================== EMERGENCY FUNCTIONS ===============================

    /**
     * @notice Emergency function to withdraw ETH from the contract
     * @param recipient Address to receive the ETH
     * @param amount Amount of ETH to withdraw (0 = withdraw all)
     * @dev Only callable by contract owner in emergency situations
     */
    function emergencyWithdrawETH(
        address payable recipient,
        uint256 amount
    ) external onlyOwner {
        if (recipient == address(0)) revert InvalidRecipient();
        if (address(this).balance == 0) revert InsufficientETHBalance();

        uint256 withdrawAmount = amount == 0 ? address(this).balance : amount;
        if (withdrawAmount > address(this).balance)
            revert InsufficientETHBalance();

        (bool success, ) = recipient.call{value: withdrawAmount}("");
        if (!success) revert ETHWithdrawalFailed();

        emit EmergencyWithdrawETH(recipient, withdrawAmount);
    }

    /**
     * @notice Emergency function to withdraw any ERC20 token from the contract
     * @param tokenAddress Address of the token to withdraw
     * @param recipient Address to receive the tokens
     * @param amount Amount of tokens to withdraw (0 = withdraw all)
     * @dev Only callable by contract owner in emergency situations
     */
    function emergencyWithdrawToken(
        address tokenAddress,
        address recipient,
        uint256 amount
    ) external onlyOwner {
        if (tokenAddress == address(0)) revert InvalidTokenAddress();
        if (recipient == address(0)) revert InvalidRecipient();

        IERC20 tokenContract = IERC20(tokenAddress);
        uint256 balance = tokenContract.balanceOf(address(this));
        if (balance == 0) revert InsufficientTokenBalance();

        uint256 withdrawAmount = amount == 0 ? balance : amount;
        if (withdrawAmount > balance) revert InsufficientTokenBalance();

        tokenContract.safeTransfer(recipient, withdrawAmount);

        emit EmergencyWithdrawToken(tokenAddress, recipient, withdrawAmount);
    }

    // Events for emergency withdrawals
    event EmergencyWithdrawETH(address indexed recipient, uint256 amount);
    event EmergencyWithdrawToken(
        address indexed token,
        address indexed recipient,
        uint256 amount
    );
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/IERC1363.sol)

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";

/**
 * @title IERC1363
 * @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
 *
 * Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
 * after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
 */
interface IERC1363 is IERC20, IERC165 {
    /*
     * Note: the ERC-165 identifier for this interface is 0xb0202a11.
     * 0xb0202a11 ===
     *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
     *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
     *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
     *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
     */

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
     * and then calls {IERC1363Receiver-onTransferReceived} on `to`.
     * @param from The address which you want to send tokens from.
     * @param to The address which you want to transfer to.
     * @param value The amount of tokens to be transferred.
     * @param data Additional data with no specified format, sent in call to `to`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value) external returns (bool);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     * @param data Additional data with no specified format, sent in call to `spender`.
     * @return A boolean value indicating whether the operation succeeded unless throwing.
     */
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../utils/introspection/IERC165.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../token/ERC20/IERC20.sol";

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.20;

import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC-20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    /**
     * @dev An operation with an ERC-20 token failed.
     */
    error SafeERC20FailedOperation(address token);

    /**
     * @dev Indicates a failed `decreaseAllowance` request.
     */
    error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
    }

    /**
     * @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
     */
    function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
        return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, value)));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        forceApprove(token, spender, oldAllowance + value);
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
     * value, non-reverting calls are assumed to be successful.
     *
     * IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
     * smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
     * this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
     * that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
        unchecked {
            uint256 currentAllowance = token.allowance(address(this), spender);
            if (currentAllowance < requestedDecrease) {
                revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
            }
            forceApprove(token, spender, currentAllowance - requestedDecrease);
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     *
     * NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
     * only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
     * set here.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            safeTransfer(token, to, value);
        } else if (!token.transferAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
     * has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * Reverts if the returned value is other than `true`.
     */
    function transferFromAndCallRelaxed(
        IERC1363 token,
        address from,
        address to,
        uint256 value,
        bytes memory data
    ) internal {
        if (to.code.length == 0) {
            safeTransferFrom(token, from, to, value);
        } else if (!token.transferFromAndCall(from, to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
     * code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
     * targeting contracts.
     *
     * NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
     * Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
     * once without retrying, and relies on the returned value to be true.
     *
     * Reverts if the returned value is other than `true`.
     */
    function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
        if (to.code.length == 0) {
            forceApprove(token, to, value);
        } else if (!token.approveAndCall(to, value, data)) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            // bubble errors
            if iszero(success) {
                let ptr := mload(0x40)
                returndatacopy(ptr, 0, returndatasize())
                revert(ptr, returndatasize())
            }
            returnSize := returndatasize()
            returnValue := mload(0)
        }

        if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
            revert SafeERC20FailedOperation(address(token));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silently catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly ("memory-safe") {
            success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0)
        }
        return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (utils/cryptography/Hashes.sol)

pragma solidity ^0.8.20;

/**
 * @dev Library of standard hash functions.
 *
 * _Available since v5.1._
 */
library Hashes {
    /**
     * @dev Commutative Keccak256 hash of a sorted pair of bytes32. Frequently used when working with merkle proofs.
     *
     * NOTE: Equivalent to the `standardNodeHash` in our https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
     */
    function commutativeKeccak256(bytes32 a, bytes32 b) internal pure returns (bytes32) {
        return a < b ? efficientKeccak256(a, b) : efficientKeccak256(b, a);
    }

    /**
     * @dev Implementation of keccak256(abi.encode(a, b)) that doesn't allocate or expand memory.
     */
    function efficientKeccak256(bytes32 a, bytes32 b) internal pure returns (bytes32 value) {
        assembly ("memory-safe") {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/cryptography/MerkleProof.sol)
// This file was procedurally generated from scripts/generate/templates/MerkleProof.js.

pragma solidity ^0.8.20;

import {Hashes} from "./Hashes.sol";

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the Merkle tree could be reinterpreted as a leaf value.
 * OpenZeppelin's JavaScript library generates Merkle trees that are safe
 * against this attack out of the box.
 *
 * IMPORTANT: Consider memory side-effects when using custom hashing functions
 * that access memory in an unsafe way.
 *
 * NOTE: This library supports proof verification for merkle trees built using
 * custom _commutative_ hashing functions (i.e. `H(a, b) == H(b, a)`). Proving
 * leaf inclusion in trees built using non-commutative hashing functions requires
 * additional logic that is not supported by this library.
 */
library MerkleProof {
    /**
     *@dev The multiproof provided is not valid.
     */
    error MerkleProofInvalidMultiproof();

    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     *
     * This version handles proofs in memory with the default hashing function.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leaves & pre-images are assumed to be sorted.
     *
     * This version handles proofs in memory with the default hashing function.
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = Hashes.commutativeKeccak256(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     *
     * This version handles proofs in memory with a custom hashing function.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bool) {
        return processProof(proof, leaf, hasher) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leaves & pre-images are assumed to be sorted.
     *
     * This version handles proofs in memory with a custom hashing function.
     */
    function processProof(
        bytes32[] memory proof,
        bytes32 leaf,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = hasher(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     *
     * This version handles proofs in calldata with the default hashing function.
     */
    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leaves & pre-images are assumed to be sorted.
     *
     * This version handles proofs in calldata with the default hashing function.
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = Hashes.commutativeKeccak256(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     *
     * This version handles proofs in calldata with a custom hashing function.
     */
    function verifyCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bool) {
        return processProofCalldata(proof, leaf, hasher) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leaves & pre-images are assumed to be sorted.
     *
     * This version handles proofs in calldata with a custom hashing function.
     */
    function processProofCalldata(
        bytes32[] calldata proof,
        bytes32 leaf,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = hasher(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * This version handles multiproofs in memory with the default hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`.
     * The `leaves` must be validated independently. See {processMultiProof}.
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * This version handles multiproofs in memory with the default hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op,
     * and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not
     * validating the leaves elsewhere.
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofFlagsLen = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proof.length != proofFlagsLen + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](proofFlagsLen);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < proofFlagsLen; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = Hashes.commutativeKeccak256(a, b);
        }

        if (proofFlagsLen > 0) {
            if (proofPos != proof.length) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[proofFlagsLen - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * This version handles multiproofs in memory with a custom hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`.
     * The `leaves` must be validated independently. See {processMultiProof}.
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bool) {
        return processMultiProof(proof, proofFlags, leaves, hasher) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * This version handles multiproofs in memory with a custom hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op,
     * and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not
     * validating the leaves elsewhere.
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofFlagsLen = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proof.length != proofFlagsLen + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](proofFlagsLen);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < proofFlagsLen; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = hasher(a, b);
        }

        if (proofFlagsLen > 0) {
            if (proofPos != proof.length) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[proofFlagsLen - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * This version handles multiproofs in calldata with the default hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`.
     * The `leaves` must be validated independently. See {processMultiProofCalldata}.
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * This version handles multiproofs in calldata with the default hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op,
     * and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not
     * validating the leaves elsewhere.
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofFlagsLen = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proof.length != proofFlagsLen + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](proofFlagsLen);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < proofFlagsLen; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = Hashes.commutativeKeccak256(a, b);
        }

        if (proofFlagsLen > 0) {
            if (proofPos != proof.length) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[proofFlagsLen - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * This version handles multiproofs in calldata with a custom hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     *
     * NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`.
     * The `leaves` must be validated independently. See {processMultiProofCalldata}.
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves, hasher) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * This version handles multiproofs in calldata with a custom hashing function.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     *
     * NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op,
     * and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not
     * validating the leaves elsewhere.
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves,
        function(bytes32, bytes32) view returns (bytes32) hasher
    ) internal view returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofFlagsLen = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proof.length != proofFlagsLen + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](proofFlagsLen);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < proofFlagsLen; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = hasher(a, b);
        }

        if (proofFlagsLen > 0) {
            if (proofPos != proof.length) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[proofFlagsLen - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[ERC].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @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 EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * 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;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    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
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // 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;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IEventAggregator {
    // Event types
    function ETH_ADD() external view returns (uint8);

    function ETH_REMOVE() external view returns (uint8);

    function TOKEN_ADD() external view returns (uint8);

    function TOKEN_REMOVE() external view returns (uint8);

    function REWARDS_CLAIMED() external view returns (uint8);

    function TRADE_EXECUTED() external view returns (uint8);

    // Main functions
    function emitLiquidityEvent(
        address user,
        address token,
        uint8 eventType,
        uint256 amount
    ) external;

    function emitETHRewardsClaimed(
        address user,
        address token,
        uint256 amount
    ) external;

    function emitTokenRewardsClaimed(
        address user,
        address token,
        uint256 amount
    ) external;

    function emitTradeExecuted(
        address user,
        uint8 tradeType,
        uint256 ethAmount,
        uint256 tokenAmount
    ) external;

    function emitMerkleRootUpdated(
        uint256 version,
        bytes32 merkleRoot
    ) external;

    function emitPoolCreated(address token, address pool) external;

    // View functions
    function getEventTypeName(
        uint8 eventType
    ) external pure returns (string memory name);

    function getTradeTypeName(
        uint8 tradeType
    ) external pure returns (string memory name);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IGradientMarketMakerFactory {
    // Events
    event PoolCreated(
        address indexed token,
        address indexed pool,
        uint256 timestamp
    );

    // Pool management
    function createPool(address token) external returns (address pool);

    function createPoolWithLiquidity(
        address token,
        address initialLiquidityProvider,
        uint256 initialEthAmount,
        uint256 initialTokenAmount
    ) external payable returns (address pool);

    function getPool(address token) external view returns (address pool);

    function poolExists(address token) external view returns (bool);

    function getAllPools() external view returns (address[] memory);

    function getPoolCount() external view returns (uint256);

    // Pool info
    function pools(uint256 index) external view returns (address);

    function poolCount() external view returns (uint256);

    // Factory info
    function owner() external view returns (address);

    function getEventAggregator() external view returns (address);

    function setEventAggregator(address _eventAggregator) external;

    /**
     * @notice Get the registry address
     * @return registryAddress Address of the GradientRegistry
     */
    function getRegistry() external view returns (address);

    /**
     * @notice Check if a given address is a valid pool
     * @param poolAddress Address to check
     * @return isValid True if the address is a valid pool
     */
    function isValidPool(
        address poolAddress
    ) external view returns (bool isValid);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

/**
 * @title IGradientRegistry
 * @notice Interface for the GradientRegistry contract
 */
interface IGradientRegistry {
    /**
     * @notice Set all main contract addresses at once
     * @param _marketMakerFactory Address of the MarketMakerFactory contract
     * @param _gradientToken Address of the Gradient token contract
     * @param _orderbook Address of the Orderbook contract
     * @param _fallbackExecutor Address of the FallbackExecutor contract
     * @param _router Address of the Uniswap V2 Router contract
     */
    function setMainContracts(
        address _marketMakerFactory,
        address _gradientToken,
        address _orderbook,
        address _fallbackExecutor,
        address _router
    ) external;

    /**
     * @notice Set an individual main contract address
     * @param contractName Name of the contract to update
     * @param newAddress New address for the contract
     */
    function setContractAddress(
        string calldata contractName,
        address newAddress
    ) external;

    /**
     * @notice Set an additional contract address using a key
     * @param key The key to identify the contract
     * @param contractAddress The address of the contract
     */
    function setAdditionalContract(
        bytes32 key,
        address contractAddress
    ) external;

    /**
     * @notice Set the block status of a token
     * @param token The address of the token to set the block status of
     * @param blocked Whether the token should be blocked
     */
    function setTokenBlockStatus(address token, bool blocked) external;

    /**
     * @notice Set a reward distributor address
     * @param rewardDistributor The address of the reward distributor to authorize
     */
    function setRewardDistributor(address rewardDistributor) external;

    /**
     * @notice Authorize or deauthorize a fulfiller
     * @param fulfiller The address of the fulfiller to authorize
     * @param status The status of the fulfiller
     */
    function authorizeFulfiller(address fulfiller, bool status) external;

    /**
     * @notice Check if an address is an authorized fulfiller
     * @param fulfiller The address to check
     * @return bool Whether the address is an authorized fulfiller
     */
    function isAuthorizedFulfiller(
        address fulfiller
    ) external view returns (bool);

    /**
     * @notice Get all main contract addresses
     * @return _marketMakerFactory Address of the MarketMakerFactory contract
     * @return _gradientToken Address of the Gradient token contract
     * @return _orderbook Address of the Orderbook contract
     * @return _fallbackExecutor Address of the FallbackExecutor contract
     * @return _router Address of the Uniswap V2 Router contract
     */
    function getAllMainContracts()
        external
        view
        returns (
            address _marketMakerFactory,
            address _gradientToken,
            address _orderbook,
            address _fallbackExecutor,
            address _router
        );

    // View functions for individual contract addresses
    function marketMakerFactory() external view returns (address);

    // Legacy function for backward compatibility (returns factory address)
    function marketMakerPool() external view returns (address);

    // New function to get pool for specific token
    function getMarketMakerPool(address token) external view returns (address);

    // New function to check if pool exists for token
    function poolExists(address token) external view returns (bool);

    function gradientToken() external view returns (address);

    function orderbook() external view returns (address);

    function fallbackExecutor() external view returns (address);

    function router() external view returns (address);

    // View functions for mappings
    function blockedTokens(address token) external view returns (bool);

    function isRewardDistributor(
        address rewardDistributor
    ) external view returns (bool);

    function authorizedFulfillers(
        address fulfiller
    ) external view returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

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

    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(uint) external view returns (address pair);

    function allPairsLength() external view returns (uint);

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

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);

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

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint);

    function balanceOf(address owner) external view returns (uint);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);

    function transfer(address to, uint value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint);

    function permit(
        address owner,
        address spender,
        uint value,
        uint deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(
        address indexed sender,
        uint amount0,
        uint amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

    function price0CumulativeLast() external view returns (uint);

    function price1CumulativeLast() external view returns (uint);

    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);

    function burn(address to) external returns (uint amount0, uint amount1);

    function swap(
        uint amount0Out,
        uint amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    )
        external
        payable
        returns (uint amountToken, uint amountETH, uint liquidity);

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountToken, uint amountETH);

    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactETHForTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts);

    function swapTokensForExactETH(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactTokensForETH(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapETHForExactTokens(
        uint amountOut,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts);

    function quote(
        uint amountA,
        uint reserveA,
        uint reserveB
    ) external pure returns (uint amountB);

    function getAmountOut(
        uint amountIn,
        uint reserveIn,
        uint reserveOut
    ) external pure returns (uint amountOut);

    function getAmountIn(
        uint amountOut,
        uint reserveIn,
        uint reserveOut
    ) external pure returns (uint amountIn);

    function getAmountsOut(
        uint amountIn,
        address[] calldata path
    ) external view returns (uint[] memory amounts);

    function getAmountsIn(
        uint amountOut,
        address[] calldata path
    ) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountETH);

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

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;

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

{
  "viaIR": true,
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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MinTokenLiquidity","type":"uint256"}],"name":"MinTokenLiquidityUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"newTotalEth","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newTotalTokens","type":"uint256"}],"name":"PoolBalanceUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"token","type":"address"}],"name":"PoolFeeDistributed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"token","type":"address"}],"name":"TokenFeeDistributed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"TokenLiquidityDeposited","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"TokenLiquidityWithdrawn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"version","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newTokenPosition","type":"uint256"}],"name":"UserPositionUpdated","type":"event"},{"inputs":[],"name":"SCALE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"accRewardPerShare","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"accTokenRewardPerShare","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"addETHLiquidityForUser","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"internalType":"uint256","name":"newTokenPosition","type":"uint256"},{"internalType":"uint256","name":"ethRewardsToAdd","type":"uint256"},{"internalType":"uint256","name":"tokenRewardsToAdd","type":"uint256"}],"name":"addETHLiquidityWithProof","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenAmount","type":"uint256"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"internalType":"uint256","name":"newTokenPosition","type":"uint256"},{"internalType":"uint256","name":"ethRewardsToAdd","type":"uint256"},{"internalType":"uint256","name":"tokenRewardsToAdd","type":"uint256"}],"name":"addLiquidityWithProof","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"addTokenLiquidityForUser","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenAmount","type":"uint256"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"internalType":"uint256","name":"newTokenPosition","type":"uint256"},{"internalType":"uint256","name":"ethRewardsToAdd","type":"uint256"},{"internalType":"uint256","name":"tokenRewardsToAdd","type":"uint256"}],"name":"addTokenLiquidityWithProof","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"internalType":"uint256","name":"newTokenPosition","type":"uint256"},{"internalType":"uint256","name":"ethRewardsToAdd","type":"uint256"},{"internalType":"uint256","name":"tokenRewardsToAdd","type":"uint256"}],"name":"claimETHRewardsWithProof","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"internalType":"uint256","name":"newTokenPosition","type":"uint256"},{"internalType":"uint256","name":"ethRewardsToAdd","type":"uint256"},{"internalType":"uint256","name":"tokenRewardsToAdd","type":"uint256"}],"name":"claimRewardsWithProof","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"},{"internalType":"uint256","name":"newETHPosition","type":"uint256"},{"internalType":"uint256","name":"newTokenPosition","type":"uint256"},{"internalType":"uint256","name":"ethRewardsToAdd","type":"uint256"},{"internalType":"uint256","name":"tokenRewardsToAdd","type":"uint256"}],"name":"claimTokenRewardsWithProof","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"currentVersion","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"distributePoolFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"distributeTokenFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address 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