Contract Address Details

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "./IDOPool.sol";
import "./IDOFactory.sol";
import "./IDOToken.sol";

// Custom errors for better gas efficiency
error InvalidAddress(string message);
error InvalidParameter(string message);
error InvalidDuration(string message);
error InvalidAmount(string message);
error InvalidRatio(string message);

contract GDCrowdfundHelper is Ownable, ReentrancyGuard, Pausable {
    using Address for address;

    // === Constants ===
    uint256 private constant BASIS_POINTS = 10000;           // Base for percentage calculations
    // uint256 private constant FIXED_TOTAL_SUPPLY = 100_000_000_000;  // 100B tokens
    uint256 private constant MAX_SHARE_RATIO = 200;         // Maximum share ratio (2%)
    uint256 private constant DECIMAL_PRECISION = 1e18;      // Standard decimal precision
    uint256 private constant MIN_IDO_ALLOCATION = 2000;     // Minimum IDO allocation (20%)
    uint256 private constant MAX_IDO_ALLOCATION = 8000;     // Maximum IDO allocation (80%)

    // === State Variables ===
    IDOFactory public immutable idoFactory;     // Factory contract for creating IDO pools
    address public rewardWallet;                // Wallet for receiving shared tokens
    uint256 public softCapRatio = 8000;         // 8000 = 80% of hardcap
    bool public enableShare;                    // Toggle for share mechanism
    uint256 public creationFee = 0.005 ether;
    uint256 public rewardFeeRatio = 10000; // 100% by default
    
    // Configurable parameters with default values
    uint256 public minIDODuration = 3 days;    // Minimum IDO duration
    uint256 public maxIDODuration = 15 days;     // Maximum IDO duration
    uint256 public shareRatio = 100;            // Share percentage in basis points (1%)
    uint256 public idoAllocationRatio = 5500;   // IDO allocation in basis points (55%)
    uint256 public lpInterestRate = 100;        // LP ETH percentage (100% of hardcap)
    uint256 public minPersonalRatio = 10;          // Minimum investment ratio(0.1%)
    uint256 public maxPersonalRatio = 10000;        // Maximum investment ratio(10%)

    // === Structs ===
    struct TokenInfo {
        address tokenAddress;     // Token contract address
        uint256 idoAmount;       // Amount of tokens for IDO
    }

    struct IDOParameters {
        uint256 hardCapInETH;      // Maximum ETH to raise
        uint256 tokenPrice;        // Price per token in ETH
        uint256 listingPrice;      // Initial DEX listing price
        uint256 idoTokens;         // Tokens allocated for IDO
        uint256 lpTokens;          // Tokens allocated for liquidity
        IDOPool.Timestamps timestamps;  // IDO timeline
        address lockerFactory;     // Factory for LP token locking
        string metadataURL;        // IPFS hash for project metadata
    }

    // IDO creation info structure
    struct IDOCreationInfo {
        // base info
        address creator;           // creator address
        uint256 fee;              // fee
        uint256 creationTime;     // creation time
        uint256 storedFeeRatio;   // fee ratio
        bool feeReturned;         // fee returned
        
        // IDO config info
        uint256 hardCapInETH;     // hard cap
        bool userEnableShare;     // user enable share
        uint256 idoTokenAmount;   // IDO token amount
        uint256 lpTokenAmount;    // LP token amount
        uint256 shareAmount;      // Share token amount
        uint256 tokenPrice;       // token price
        uint256 listingPrice;     // listing price
        
        // DEX info
        address router;           // DEX router address
        address factory;          // DEX factory address
        address weth;            // WETH address
        
        // timestamps info
        uint256 startTime;        // start time
        uint256 endTime;          // end time
        uint256 unlockTime;       // unlock time
        address idoPoolAddress;   // IDO pool address

        // metadata info
        string metadataURL;        // metadata URL
    }
    
    mapping(address => IDOCreationInfo) public idoCreationInfo;

    // === Events ===
    event TokenCreated(
        address token,      // Address of created token
        string name,        // Token name
        string symbol,      // Token symbol
        uint256 totalSupply,        // Total token supply
        address receiver      // Receiver address
    );
    
    event IDOCreated(
        address indexed token,
        address indexed creator,
        uint256 fee,
        uint256 feeRatio,
        IDOCreationInfo info,
        uint256 timestamp
    );

    event IDOCreatedByHelper(
        address indexed token,      // Token address
        address indexed idoPool,    // IDO pool address
        uint256 shareAmount,       // Share amount
        uint256 timestamp,         // Creation timestamp
        uint256 idoTokenAmount,    // token amount for ido
        uint256 lpTokenAmount      // token amount for lp
    );
    
    event ConfigUpdated(
        string indexed configName,  // Name of updated parameter
        uint256 oldValue,          // Previous value
        uint256 newValue,          // New value
        address indexed operator   // Address that made the update
    );

    event WalletUpdated(
        address indexed oldWallet,  // Previous wallet address
        address indexed newWallet,  // New wallet address
        address indexed operator   // Address that made the update
    );
    
    event EmergencyAction(
        string indexed actionType,  // Type of emergency action
        address indexed initiator, // Address that initiated the action
        uint256 timestamp         // Action timestamp
    );

    event ShareStatusUpdated(
        bool enabled,              // New share status
        address indexed operator  // Address that made the update
    );

    event Calculation(
        uint256 hardCapInETH,
        uint256 hardCapWei,
        uint256 tokenPrice,
        uint256 idoTokenAmount,
        uint256 lpTokenAmount,
        uint256 shareAmount
    );

    event TokenDistribution(
        uint256 totalSupply,
        uint256 idoAllocationRatio,
        uint256 shareRatio,
        uint256 lpInterestRate
    );

    event CreationFeeUpdated(
        uint256 indexed oldFee, 
        uint256 indexed newFee, 
        address indexed operator
    );
    
    event RewardFeeRatioUpdated(
        uint256 indexed oldRatio, 
        uint256 indexed newRatio, 
        address indexed operator
    );
    
    event FeeReturned(
        address indexed token, 
        address indexed creator, 
        uint256 amount,
        uint256 originalFee,
        uint256 appliedRatio
    );

    event IDOActivated(
        address indexed poolAddress,
        address indexed lpToken,
        uint256 timestamp
    );

    address private constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;

    /**
     * @dev Modifier to validate address is not zero
     */
    modifier validAddress(address _address) {
        if(_address == address(0)) revert InvalidAddress("Zero address");
        _;
    }

    /**
     * @dev Contract constructor
     * @param _idoFactory Address of IDO factory contract
     * @param _rewardWallet Address to receive shared tokens
     * @param _initialShareRatio Initial share ratio in basis points
     */
    constructor(
        address _idoFactory,
        address _rewardWallet,
        uint256 _initialShareRatio
    ) validAddress(_idoFactory) validAddress(_rewardWallet) {
        if(!_idoFactory.isContract()) revert InvalidAddress("Factory must be contract");
        if(_initialShareRatio > MAX_SHARE_RATIO) revert InvalidRatio("Share ratio too high");

        idoFactory = IDOFactory(_idoFactory);
        rewardWallet = _rewardWallet;
        shareRatio = _initialShareRatio;
    }

    /**
     * @dev Internal function to validate contract address
     * @param addr Address to validate
     * @param errorMsg Error message if validation fails
     */
    function _validateContractAddress(address addr, string memory errorMsg) private view {
        if (addr == address(0)) revert InvalidAddress("Zero address");
        if (!addr.isContract()) revert InvalidAddress(errorMsg);
    }

    /**
     * @dev Public function to get fee information
     * @return feeToken Fee token address
     * @return feeAmount Fee amount
     */
    function getFeeInfo() public view returns (address feeToken, uint256 feeAmount) {
        return (
            address(idoFactory.feeToken()),
            idoFactory.feeAmount()
        );
    }

    /**
     * @dev Create token and launch IDO
     * @param _tokenInfo Token information (name, symbol)
     * @param hardCapInETH Maximum ETH to raise
     * @param _timestamps IDO timeline parameters
     * @param _lockerFactoryAddress Locker factory address
     * @param _metadataURL Project metadata URL
     * @param _dexInfo DEX configuration
     * @param _userEnableShare User enable share
     */
    function createIDO(
        TokenInfo calldata _tokenInfo,
        uint256 hardCapInETH,
        IDOPool.Timestamps calldata _timestamps,
        address _lockerFactoryAddress,
        string calldata _metadataURL,
        IDOPool.DEXInfo calldata _dexInfo,
        bool _userEnableShare
    ) external payable nonReentrant whenNotPaused onlyOwner() {
        // creationFee 
        require(msg.value >= creationFee, "Insufficient creation fee");
        
        // 1. get fee info
        (address _feeToken, uint256 _feeAmount) = getFeeInfo();
        
        if (_feeToken != address(0) && _feeAmount > 0) {
            // validate all related addresses
            require(address(idoFactory) != address(0), "IDOFactory address is zero");
            require(msg.sender != address(0), "Sender address is zero");
            require(address(this) != address(0), "Helper address is zero");
            
            ERC20 feeToken = ERC20(_feeToken);
            
            // check balance and allowance
            require(feeToken.balanceOf(msg.sender) >= _feeAmount, "Insufficient fee token balance");
            require(feeToken.allowance(msg.sender, address(this)) >= _feeAmount, "Insufficient allowance");
            
            // transfer fee token to helper
            bool success = feeToken.transferFrom(msg.sender, address(this), _feeAmount);
            require(success, "Fee token transfer to helper failed");
            
            // check helper balance
            uint256 helperBalance = feeToken.balanceOf(address(this));
            require(helperBalance >= _feeAmount, "Helper insufficient balance after transfer");
            
            // approve fee token to factory
            success = feeToken.approve(address(idoFactory), _feeAmount);
            require(success, "Fee token approval to factory failed");
        }
        
        // 1. Checks (all checks)
        if(hardCapInETH == 0) revert InvalidAmount("Invalid hardcap");
        _validateContractAddress(_lockerFactoryAddress, "Locker must be contract");
        _validateContractAddress(_dexInfo.router, "Router must be contract");
        _validateContractAddress(_dexInfo.factory, "Factory must be contract");
        _validateContractAddress(_dexInfo.weth, "WETH must be contract");
        _validateContractAddress(_tokenInfo.tokenAddress, "Token address invalid");
        
        // set unlockTimestamp = endTimestamp
        IDOPool.Timestamps memory timestamps = IDOPool.Timestamps({
            startTimestamp: _timestamps.startTimestamp,
            endTimestamp: _timestamps.endTimestamp,
            unlockTimestamp: _timestamps.endTimestamp  // 确保 unlockTimestamp = endTimestamp
        });
        
        // validate timestamps
        _validateTimestamps(timestamps);

        // Validate token amount and allowance
        IERC20 idoToken = IERC20(_tokenInfo.tokenAddress);
        require(_tokenInfo.idoAmount > 0, "IDO amount must be greater than 0");
        require(
            idoToken.balanceOf(msg.sender) >= _tokenInfo.idoAmount,
            "Insufficient token balance"
        );
        require(
            idoToken.allowance(msg.sender, address(this)) >= _tokenInfo.idoAmount,
            "Insufficient token allowance"
        );

        // Transfer tokens to helper
        require(
            idoToken.transferFrom(msg.sender, address(this), _tokenInfo.idoAmount),
            "Token transfer to helper failed"
        );

        // Approve tokens to factory
        require(
            idoToken.approve(address(idoFactory), _tokenInfo.idoAmount + _feeAmount),
            "Token approval to factory failed"
        );

        // 2. Effects (state calculation)
        bool finalEnableShare = enableShare && _userEnableShare;
        
        (uint256 tokenPrice, uint256 listingPrice, uint256 idoTokenAmount, uint256 lpTokenAmount, uint256 shareAmount) = 
            _calculateTokenDistributionFromAmount(_tokenInfo.idoAmount, hardCapInETH, finalEnableShare);

        // store creation info
        idoCreationInfo[_tokenInfo.tokenAddress] = IDOCreationInfo({
            creator: msg.sender,
            fee: msg.value,
            creationTime: block.timestamp,
            storedFeeRatio: rewardFeeRatio, // store current reward ratio
            feeReturned: false,
            hardCapInETH: hardCapInETH,
            userEnableShare: _userEnableShare,
            idoTokenAmount: idoTokenAmount,
            lpTokenAmount: lpTokenAmount,
            shareAmount: shareAmount,
            tokenPrice: tokenPrice,
            listingPrice: listingPrice,
            router: _dexInfo.router,
            factory: _dexInfo.factory,
            weth: _dexInfo.weth,
            startTime: timestamps.startTimestamp,
            endTime: timestamps.endTimestamp,
            unlockTime: timestamps.endTimestamp,
            idoPoolAddress: address(0),
            metadataURL: _metadataURL
        });
        
        emit IDOCreated(
            _tokenInfo.tokenAddress,
            msg.sender,
            msg.value,
            rewardFeeRatio,
            idoCreationInfo[_tokenInfo.tokenAddress],
            block.timestamp
        );
        
        // 4. Interactions (external interactions)
        _executeExternalInteractions(
            ERC20(_tokenInfo.tokenAddress),
            shareAmount,
            idoTokenAmount,
            lpTokenAmount,
            hardCapInETH,
            tokenPrice,
            listingPrice,
            timestamps,
            _lockerFactoryAddress,
            _metadataURL,
            _dexInfo
        );
    }

    function _calculateTokenDistributionFromAmount(
        uint256 totalAmount,
        uint256 hardCapInETH,
        bool _enableShare
    ) private returns (
        uint256 tokenPrice,
        uint256 listingPrice,
        uint256 idoTokenAmount,
        uint256 lpTokenAmount,
        uint256 shareAmount
    ) {
        emit TokenDistribution(
            totalAmount,
            idoAllocationRatio,
            shareRatio,
            lpInterestRate
        );
        
        uint256 hardCapWei = hardCapInETH * DECIMAL_PRECISION;
        
        unchecked {
            // 1. compute base amount
            uint256 baseAmount = totalAmount / DECIMAL_PRECISION;
            uint256 baseIdoAmount = (baseAmount * idoAllocationRatio) / BASIS_POINTS;
            uint256 baseShareAmount = _enableShare ? (baseAmount * shareRatio) / BASIS_POINTS : 0;
            uint256 baseLpAmount = baseAmount - baseIdoAmount - baseShareAmount;
            
            // 2. compute token price
            tokenPrice = hardCapWei / baseIdoAmount;
            
            uint256 ethForLP = (hardCapWei * lpInterestRate) / 100;
            listingPrice = ethForLP / baseLpAmount;

            // 3. add precision
            idoTokenAmount = baseIdoAmount * DECIMAL_PRECISION;
            shareAmount = baseShareAmount * DECIMAL_PRECISION;
            lpTokenAmount = baseLpAmount * DECIMAL_PRECISION;

            emit Calculation(
                hardCapInETH,
                hardCapWei,
                tokenPrice,
                idoTokenAmount,
                lpTokenAmount,
                shareAmount
            );
        }
        
        return (tokenPrice, listingPrice, idoTokenAmount, lpTokenAmount, shareAmount);
    }

    // execute external interactions
    function _executeExternalInteractions(
        ERC20 token,
        uint256 shareAmount,
        uint256 idoTokenAmount,
        uint256 lpTokenAmount,
        uint256 hardCapInETH,
        uint256 tokenPrice,
        uint256 listingPrice,
        IDOPool.Timestamps memory timestamps,
        address lockerFactory,
        string memory metadataURL,
        IDOPool.DEXInfo memory dexInfo
    ) private {
        // 1. transfer share token (if enabled)
        if (enableShare && shareAmount > 0) {
            bool shareTransferSuccess = token.transfer(
                rewardWallet, 
                shareAmount
            );
            require(shareTransferSuccess, "Share transfer failed");
        }

        // 2. create IDO pool financial info
        IDOPool.FinInfo memory finInfo = IDOPool.FinInfo({
            hardCap: hardCapInETH * DECIMAL_PRECISION,
            softCap: (hardCapInETH * DECIMAL_PRECISION * softCapRatio) / BASIS_POINTS,
            tokenPrice: tokenPrice,
            lpInterestRate: lpInterestRate,
            listingPrice: listingPrice,
            minEthPayment: hardCapInETH * DECIMAL_PRECISION * minPersonalRatio / BASIS_POINTS,
            maxEthPayment: hardCapInETH * DECIMAL_PRECISION * maxPersonalRatio / BASIS_POINTS
        });

        // 3. use new createIDObyHelper method
        address idoPoolAddress = idoFactory.createIDOByHelper(
            token,
            finInfo,
            timestamps,
            dexInfo,
            lockerFactory,
            metadataURL,
            idoTokenAmount, 
            lpTokenAmount
        );

        // update IDO creation info pool address
        IDOCreationInfo storage info = idoCreationInfo[address(token)];
        info.idoPoolAddress = idoPoolAddress;

        emit IDOCreatedByHelper(
            address(token),
            idoPoolAddress,
            shareAmount,
            block.timestamp,
            idoTokenAmount,
            lpTokenAmount
        );
    }

    /**
     * @dev Validate IDO timestamps
     * @param _timestamps IDO timeline parameters
     */
    function _validateTimestamps(IDOPool.Timestamps memory _timestamps) private view {
        // Start time must be in future
        if(_timestamps.startTimestamp <= block.timestamp) {
            revert InvalidDuration("Start time must be in future");
        }
        
        // End time must be after start time
        if(_timestamps.endTimestamp <= _timestamps.startTimestamp) {
            revert InvalidDuration("End time must be after start");
        }
        
        // Unlock time must be at least the same as end time (ensure they are equal)
        if(_timestamps.unlockTimestamp != _timestamps.endTimestamp) {
            revert InvalidDuration("Unlock time must be same as end time");
        }
        
        // Validate IDO duration
        uint256 duration = _timestamps.endTimestamp - _timestamps.startTimestamp;
        if(duration < minIDODuration) revert InvalidDuration("IDO duration too short");
        if(duration > maxIDODuration) revert InvalidDuration("IDO duration too long");
    }

    /**
     * @dev Update reward wallet address
     * @param _newWallet New wallet address
     */
    function updateRewardWallet(address _newWallet) 
        external 
        onlyOwner 
        validAddress(_newWallet) 
    {
        if(_newWallet == rewardWallet) revert InvalidAddress("Same wallet address");
        
        address oldWallet = rewardWallet;
        rewardWallet = _newWallet;
        
        emit WalletUpdated(
            oldWallet, 
            _newWallet, 
            msg.sender
        );
    }

    /**
     * @dev Update share ratio
     * @param _newRatio New share ratio
     */
    function updateShareRatio(uint256 _newRatio) external onlyOwner {
        if(_newRatio > MAX_SHARE_RATIO) revert InvalidRatio("Share ratio too high");
        
        uint256 oldRatio = shareRatio;
        shareRatio = _newRatio;
        
        emit ConfigUpdated(
            "ShareRatio",
            oldRatio,
            _newRatio,
            msg.sender
        );
    }

    /**
     * @dev Update IDO duration range
     * @param _newMinDuration New minimum duration
     * @param _newMaxDuration New maximum duration
     */
    function updateIDODuration(
        uint256 _newMinDuration,
        uint256 _newMaxDuration
    ) external onlyOwner {
        if(_newMinDuration == 0) revert InvalidDuration("Min duration must be > 0");
        if(_newMaxDuration <= _newMinDuration) revert InvalidDuration("Max must be > min");
        
        uint256 oldMinDuration = minIDODuration;
        uint256 oldMaxDuration = maxIDODuration;
        
        minIDODuration = _newMinDuration;
        maxIDODuration = _newMaxDuration;
        
        emit ConfigUpdated(
            "MinDuration",
            oldMinDuration,
            _newMinDuration,
            msg.sender
        );
        emit ConfigUpdated(
            "MaxDuration",
            oldMaxDuration,
            _newMaxDuration,
            msg.sender
        );
    }

    /**
     * @dev Update LP interest rate
     * @param _newRate New LP interest rate (1-100)
     */
    function updateLPInterestRate(uint256 _newRate) external onlyOwner {
        if(_newRate == 0 || _newRate > 100) revert InvalidRatio("Invalid rate: 1-100");
        
        uint256 oldRate = lpInterestRate;
        lpInterestRate = _newRate;
        
        emit ConfigUpdated(
            "LPInterestRate",
            oldRate,
            _newRate,
            msg.sender
        );
    }

    /**
     * @dev Update IDO allocation ratio
     * @param _newRatio New allocation ratio
     */
    function updateIDOAllocation(uint256 _newRatio) external onlyOwner {
        if(_newRatio < MIN_IDO_ALLOCATION) revert InvalidRatio("Allocation too low");
        if(_newRatio > MAX_IDO_ALLOCATION) revert InvalidRatio("Allocation too high");
        
        uint256 oldRatio = idoAllocationRatio;
        idoAllocationRatio = _newRatio;
        
        emit ConfigUpdated(
            "IdoAllocation",
            oldRatio,
            _newRatio,
            msg.sender
        );
    }

    /**
     * @dev Emergency withdraw
     * @param token Token address, address(0) represents ETH
     */
    function emergencyWithdraw(address token) external onlyOwner {
        if(token == address(0)) {
            uint256 balance = address(this).balance;
            if(balance > 0) {
                (bool success,) = payable(owner()).call{value: balance}("");
                if(!success) revert InvalidParameter("ETH transfer failed");
            }
        } else {
            IERC20 tokenContract = IERC20(token);
            uint256 balance = tokenContract.balanceOf(address(this));
            if(balance > 0) {
                if(!tokenContract.transfer(owner(), balance)) {
                    revert InvalidParameter("Token transfer failed");
                }
            }
        }
        
        emit EmergencyAction(
            "WITHDRAW", 
            msg.sender, 
            block.timestamp
        );
    }

    /**
     * @dev Get all current configurations
     */
    function getConfigurations() external view returns (
        address _rewardWallet,
        uint256 _shareRatio,
        uint256 _idoAllocationRatio,
        uint256 _lpInterestRate,
        uint256 _minIDODuration,
        uint256 _maxIDODuration,
        bool _enableShare,
        uint256 _creationFee,
        uint256 _rewardFeeRatio
    ) {
        return (
            rewardWallet,
            shareRatio,
            idoAllocationRatio,
            lpInterestRate,
            minIDODuration,
            maxIDODuration,
            enableShare,
            creationFee,
            rewardFeeRatio
        );
    }

    /**
     * @dev Receive ETH
     */
    receive() external payable {}

    /**
     * @dev Control function
     * @param _enable Whether to enable share mechanism
     */
    function setEnableShare(bool _enable) external onlyOwner {
        enableShare = _enable;
        emit ShareStatusUpdated(_enable, msg.sender);
    }

    /**
     * @dev Update personal limits
     * @param _newMinRatio New minimum ratio
     * @param _newMaxRatio New maximum ratio
     */
    function updatePersonalLimits(
        uint256 _newMinRatio,
        uint256 _newMaxRatio
    ) external onlyOwner {
        if(_newMinRatio == 0 || _newMinRatio > 10000) revert InvalidRatio("Min ratio must be > 0 and <= 10000");
        if(_newMaxRatio == 0 || _newMaxRatio > 10000) revert InvalidRatio("Max ratio must be > 0 and <= 10000");
        if(_newMinRatio >= _newMaxRatio) revert InvalidRatio("Min ratio must be less than max");
        
        uint256 oldMinRatio = minPersonalRatio;
        uint256 oldMaxRatio = maxPersonalRatio;
        
        minPersonalRatio = _newMinRatio;
        maxPersonalRatio = _newMaxRatio;
        
        emit ConfigUpdated("MinPersonalRatio", oldMinRatio, _newMinRatio, msg.sender);
        emit ConfigUpdated("MaxPersonalRatio", oldMaxRatio, _newMaxRatio, msg.sender);
    }

    /**
     * @dev Activate IDO and handle token distribution
     * @param _poolAddress IDO pool address
     */
    function activateIDO(address _poolAddress) external nonReentrant onlyOwner() {
        _validateContractAddress(_poolAddress, "Pool must be contract");
        IDOPool pool = IDOPool(_poolAddress);
        
        // check owner
        require(
            pool.owner() == address(this),
            "Helper is not the pool owner"
        );
        
        // get unlockTimestamp
        (,, uint256 unlockTimestamp) = pool.timestamps();
        require(
            block.timestamp > unlockTimestamp,
            "Not reached unlock time"
        );
        
        // validate not distributed
        require(!pool.distributed(), "Already distributed");
        
        // 1. withdraw ETH and add liquidity
        pool.withdrawETH();
        
        // 2. get LP token address, ignore router
        (, address factory, address weth) = pool.dexInfo();
        address lpTokenAddress = IUniswapV2Factory(factory).getPair(
            address(pool.rewardToken()),
            weth
        );
        
        // 3. burn LP token - transfer to burn address
        uint256 lpBalance = IERC20(lpTokenAddress).balanceOf(address(this));
        if (lpBalance > 0) {
            require(
                IERC20(lpTokenAddress).transfer(BURN_ADDRESS, lpBalance),
                "LP burn failed"
            );
        }
        
        // 4. burn unsold tokens - use IDOToken's burn method
        uint256 balance = pool.getNotSoldToken();
        if (balance > 0) {
            pool.withdrawNotSoldTokens();
            IDOToken rewardToken = IDOToken(address(pool.rewardToken()));
            uint256 unsoldBalance = rewardToken.balanceOf(address(this));
            if (unsoldBalance > 0) {
                rewardToken.burn(unsoldBalance);
            }
        }
        
        emit IDOActivated(
            _poolAddress,
            lpTokenAddress,
            block.timestamp
        );
        
        // use creation fee ratio to return fee
        // IDOCreationInfo storage info = idoCreationInfo[address(pool.rewardToken())];
        // if (!info.feeReturned && info.fee > 0) {
        //     uint256 rewardAmount = (info.fee * info.storedFeeRatio) / BASIS_POINTS;
        //     if (rewardAmount > 0) {
        //         info.feeReturned = true;
        //         (bool success,) = payable(info.creator).call{value: rewardAmount}("");
        //         require(success, "Fee return failed");
                
        //         emit FeeReturned(
        //             address(pool.rewardToken()),
        //             info.creator,
        //             rewardAmount,
        //             info.fee,
        //             info.storedFeeRatio
        //         );
        //     }
        // }
    }

    /**
     * @dev Update soft cap ratio
     * @param _newRatio New soft cap ratio (in basis points, 1-10000)
     */
    function updateSoftCapRatio(uint256 _newRatio) external onlyOwner {
        if(_newRatio == 0 || _newRatio > BASIS_POINTS) revert InvalidRatio("Invalid ratio: 1-10000");
        
        uint256 oldRatio = softCapRatio;
        softCapRatio = _newRatio;
        
        emit ConfigUpdated(
            "SoftCapRatio",
            oldRatio,
            _newRatio,
            msg.sender
        );
    }

    /**
     * @dev Update creation fee
     * @param _newFee New creation fee in wei
     */
    function updateCreationFee(uint256 _newFee) external onlyOwner {
        require(_newFee > 0, "Creation fee must be greater than zero");
        
        uint256 oldFee = creationFee;
        creationFee = _newFee;
        
        emit CreationFeeUpdated(oldFee, _newFee, msg.sender);
    }

    /**
     * @dev Update reward fee ratio
     * @param _newRatio New reward fee ratio (in basis points)
     */
    function updateRewardFeeRatio(uint256 _newRatio) external onlyOwner {
        require(_newRatio <= 10000, "Reward fee ratio must be <= 100%");
        
        uint256 oldRatio = rewardFeeRatio;
        rewardFeeRatio = _newRatio;
        
        emit RewardFeeRatioUpdated(oldRatio, _newRatio, msg.sender);
    }
}
        

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";

import "./IDOPool.sol";

contract IDOFactory is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for ERC20Burnable;
    using SafeERC20 for ERC20;

    ERC20Burnable public feeToken;
    address public feeWallet;
    uint256 public feeAmount;
    uint256 public burnPercent; // use this state only if your token is ERC20Burnable and has burnFrom method
    uint256 public divider;

    address[] public idoPools;

    event IDOCreated(
        address indexed owner,
        address idoPool,
        address indexed rewardToken,
        string tokenURI
    );

    event IDOCreatedByHelper(
        address indexed owner,
        address idoPool,
        address indexed rewardToken,
        string tokenURI,
        uint256 idoTokenAmount,     // IDO token exact amount
        uint256 lpTokenAmount      // LP token exact amount
    );

    event TokenFeeUpdated(address newFeeToken);
    event FeeAmountUpdated(uint256 newFeeAmount);
    event BurnPercentUpdated(uint256 newBurnPercent, uint256 divider);
    event FeeWalletUpdated(address newFeeWallet);

    event IDOPoolInitialized(
        address indexed idoPool,
        address indexed rewardToken,
        IDOPool.FinInfo finInfo,
        IDOPool.Timestamps timestamps,
        IDOPool.DEXInfo dexInfo,
        address lockerFactory,
        string metadataURL
    );

    constructor(
        ERC20Burnable _feeToken,
        uint256 _feeAmount,
        uint256 _burnPercent
    ){
        feeToken = _feeToken;
        feeAmount = _feeAmount;
        burnPercent = _burnPercent;
        divider = 100;
    }

    function getIdoPools() public view returns (address[] memory) {
      return idoPools;
    }

    function setFeeToken(address _newFeeToken) external onlyOwner {
        require(isContract(_newFeeToken), "New address is not a token");
        feeToken = ERC20Burnable(_newFeeToken);

        emit TokenFeeUpdated(_newFeeToken);
    }

    function setFeeAmount(uint256 _newFeeAmount) external onlyOwner {
        feeAmount = _newFeeAmount;

        emit FeeAmountUpdated(_newFeeAmount);
    }

    function setFeeWallet(address _newFeeWallet) external onlyOwner {
        feeWallet = _newFeeWallet;

        emit FeeWalletUpdated(_newFeeWallet);
    }

    function setBurnPercent(uint256 _newBurnPercent, uint256 _newDivider)
        external
        onlyOwner
    {
        require(_newBurnPercent <= _newDivider, "Burn percent must be less than divider");
        burnPercent = _newBurnPercent;
        divider = _newDivider;

        emit BurnPercentUpdated(_newBurnPercent, _newDivider);
    }

    function handleFees() internal {
       if(feeAmount > 0){
            if (burnPercent > 0){
                uint256 burnAmount = feeAmount.mul(burnPercent).div(divider);

                feeToken.safeTransferFrom(
                    msg.sender,
                    feeWallet,
                    feeAmount.sub(burnAmount)
                );

                feeToken.burnFrom(msg.sender, burnAmount);
            } else {
                feeToken.safeTransferFrom(
                    msg.sender,
                    feeWallet,
                    feeAmount
                );
            }
        }
    }

    function createIDO(
        ERC20 _rewardToken,
        IDOPool.FinInfo memory _finInfo,
        IDOPool.Timestamps memory _timestamps,
        IDOPool.DEXInfo memory _dexInfo,
        address _lockerFactoryAddress,
        string memory _metadataURL
    ) external returns (address idoPoolAddress) {
        IDOPool idoPool =
            new IDOPool(
                _rewardToken,
                _finInfo,
                _timestamps,
                _dexInfo,
                _lockerFactoryAddress,
                _metadataURL
            );

        uint8 tokenDecimals = _rewardToken.decimals();

        uint256 transferAmount = getTokenAmount(_finInfo.hardCap, _finInfo.tokenPrice, tokenDecimals);

        if (_finInfo.lpInterestRate > 0 && _finInfo.listingPrice > 0) {
            transferAmount += getTokenAmount(_finInfo.hardCap * _finInfo.lpInterestRate / 100, _finInfo.listingPrice, tokenDecimals);
        }

        idoPool.transferOwnership(msg.sender);

        idoPoolAddress = address(idoPool);
        _rewardToken.safeTransferFrom(
            msg.sender,
            idoPoolAddress,
            transferAmount
        );

        idoPools.push(idoPoolAddress);

        emit IDOCreated(
            msg.sender,
            idoPoolAddress,
            address(_rewardToken),
            _metadataURL
        );

        handleFees();
    }

    function createIDOByHelper(
        ERC20 _rewardToken,
        IDOPool.FinInfo memory _finInfo,
        IDOPool.Timestamps memory _timestamps,
        IDOPool.DEXInfo memory _dexInfo,
        address _lockerFactoryAddress,
        string memory _metadataURL,
        uint256 idoTokenAmount,
        uint256 lpTokenAmount
    ) external returns (address idoPoolAddress) {
        IDOPool idoPool = new IDOPool(
            _rewardToken,
            _finInfo,
            _timestamps,
            _dexInfo,
            _lockerFactoryAddress,
            _metadataURL
        );

        // trigger initialized event
        emit IDOPoolInitialized(
            address(idoPool),
            address(_rewardToken),
            _finInfo,
            _timestamps,
            _dexInfo,
            _lockerFactoryAddress,
            _metadataURL
        );

        // use exact token amount
        uint256 transferAmount = idoTokenAmount + lpTokenAmount;

        // transfer ownership
        idoPool.transferOwnership(msg.sender);
        
        // set pool address
        idoPoolAddress = address(idoPool);

        // transfer token to pool
        _rewardToken.safeTransferFrom(
            msg.sender,
            idoPoolAddress,
            transferAmount
        );

        // record pool address
        idoPools.push(idoPoolAddress);

        // trigger event
        emit IDOCreatedByHelper(
            msg.sender,
            idoPoolAddress,
            address(_rewardToken),
            _metadataURL,
            idoTokenAmount, 
            lpTokenAmount
        );

        handleFees();
    }

    function getTokenAmount(
        uint256 ethAmount,
        uint256 tokenPrice,
        uint8 decimals
    ) internal pure returns (uint256) {
        return (ethAmount / tokenPrice) * (10**decimals);
    }
    function isContract(address _addr) private view returns (bool) {
        uint32 size;
        assembly {
            size := extcodesize(_addr)
        }
        return (size > 0);
    }

}
          

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
import "./TokenLockerFactory.sol";

contract IDOPool is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    struct FinInfo {
        uint256 tokenPrice; // one token in WEI
        uint256 softCap;
        uint256 hardCap;
        uint256 minEthPayment;
        uint256 maxEthPayment;
        uint256 listingPrice; // one token in WEI
        uint256 lpInterestRate;
    }

    struct Timestamps {
        uint256 startTimestamp;
        uint256 endTimestamp;
        uint256 unlockTimestamp;
    }

    struct DEXInfo {
        address router;
        address factory;
        address weth;
    }

    struct UserInfo {
        uint debt;
        uint total;
        uint totalInvestedETH;
    }

    ERC20 public rewardToken;
    uint256 public decimals;
    string public metadataURL;

    FinInfo public finInfo;
    Timestamps public timestamps;
    DEXInfo public dexInfo;

    TokenLockerFactory public lockerFactory;

    uint256 public totalInvestedETH;
    uint256 public tokensForDistribution;
    uint256 public distributedTokens;

    bool public distributed = false;

    mapping(address => UserInfo) public userInfo;

    event TokensDebt(
        address indexed holder,
        uint256 ethAmount,
        uint256 tokenAmount
    );

    event TokensWithdrawn(address indexed holder, uint256 amount);

    // Events for detailed parameter logging
    event AddLiquidityETHParams(
        address token,           // Token address
        uint256 amountToken,     // Token amount
        uint256 amountETH,       // ETH amount
        uint256 amountTokenMin,  // Minimum token amount (slippage protection)
        uint256 amountETHMin,    // Minimum ETH amount (slippage protection)
        address to,              // LP token recipient
        uint256 deadline         // Transaction deadline
    );

    event TokenLockerParams(
        address lpToken,         // LP token address
        string lockerName,       // Locker name
        uint256 amount,          // Amount to lock
        address owner,           // Locker owner
        uint256 unlockTime,      // Unlock timestamp
        uint256 value            // ETH value sent for fee
    );

    event ETHTransferParams(
        address to,              // Recipient address
        uint256 amount,          // Amount to transfer
        bool isLockFee           // Whether it's a lock fee
    );

    // Debug parameters event
    event DebugParams(
        string label,            // Parameter label for identification
        uint256 value1,          // Primary value
        uint256 value2,          // Secondary value
        address addr1,           // Primary address
        address addr2            // Secondary address
    );

    constructor(
        ERC20 _rewardToken,
        FinInfo memory _finInfo,
        Timestamps memory _timestamps,
        DEXInfo memory _dexInfo,
        address _lockerFactoryAddress,
        string memory _metadataURL
    ) {

        rewardToken = _rewardToken;
        decimals = rewardToken.decimals();
        lockerFactory = TokenLockerFactory(_lockerFactoryAddress);

        finInfo = _finInfo;

        setTimestamps(_timestamps);

        dexInfo = _dexInfo;

        setMetadataURL(_metadataURL);
    }

    function setTimestamps(Timestamps memory _timestamps) internal {
        require(
            _timestamps.startTimestamp < _timestamps.endTimestamp,
            "Start timestamp must be less than finish timestamp"
        );
        require(
            _timestamps.endTimestamp > block.timestamp,
            "Finish timestamp must be more than current block"
        );

        timestamps = _timestamps;
    }

    function setMetadataURL(string memory _metadataURL) public{
        metadataURL = _metadataURL;
    }

    function pay() payable external {
        require(block.timestamp >= timestamps.startTimestamp, "Not started");
        require(block.timestamp < timestamps.endTimestamp, "Ended");

        require(msg.value >= finInfo.minEthPayment, "Less then min amount");
        require(msg.value <= finInfo.maxEthPayment, "More then max amount");
        require(totalInvestedETH.add(msg.value) <= finInfo.hardCap, "Overfilled");

        UserInfo storage user = userInfo[msg.sender];
        require(user.totalInvestedETH.add(msg.value) <= finInfo.maxEthPayment, "More then max amount");

        uint256 tokenAmount = getTokenAmount(msg.value, finInfo.tokenPrice);

        totalInvestedETH = totalInvestedETH.add(msg.value);
        tokensForDistribution = tokensForDistribution.add(tokenAmount);
        user.totalInvestedETH = user.totalInvestedETH.add(msg.value);
        user.total = user.total.add(tokenAmount);
        user.debt = user.debt.add(tokenAmount);

        emit TokensDebt(msg.sender, msg.value, tokenAmount);
    }

    function refund() external {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH < finInfo.softCap, "The IDO pool has reach soft cap.");

        UserInfo storage user = userInfo[msg.sender];

        uint256 _amount = user.totalInvestedETH;
        require(_amount > 0 , "You have no investment.");

        user.debt = 0;
        user.totalInvestedETH = 0;
        user.total = 0;

        (bool success, ) = msg.sender.call{value: _amount}("");
        require(success, "Transfer failed.");

    }

    /// @dev Allows to claim tokens for the specific user.
    /// @param _user Token receiver.
    function claimFor(address _user) external {
        proccessClaim(_user);
    }

    /// @dev Allows to claim tokens for themselves.
    function claim() external {
        proccessClaim(msg.sender);
    }

    /// @dev Proccess the claim.
    /// @param _receiver Token receiver.
    function proccessClaim(
        address _receiver
    ) internal nonReentrant{
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH >= finInfo.softCap, "The IDO pool did not reach soft cap.");

        UserInfo storage user = userInfo[_receiver];

        uint256 _amount = user.debt;
        require(_amount > 0 , "You do not have debt tokens.");

        user.debt = 0;
        distributedTokens = distributedTokens.add(_amount);
        rewardToken.safeTransfer(_receiver, _amount);
        emit TokensWithdrawn(_receiver,_amount);
    }

    // /**
    //  * @dev Debug version of withdrawETH that logs all parameters without actual external calls
    //  * Records exact parameters that would be passed to addLiquidityETH
    //  */
    // function withdrawETHDebug() external payable onlyOwner {
    //     // Check prerequisites
    //     require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
    //     require(totalInvestedETH >= finInfo.softCap, "The IDO pool did not reach soft cap.");
    //     require(!distributed, "Already distributed.");

    //     // Record initial state
    //     emit DebugParams(
    //         "Initial State", 
    //         address(this).balance,            // Contract ETH balance
    //         rewardToken.balanceOf(address(this)), // Contract token balance
    //         address(0),
    //         address(0)
    //     );
        
    //     // Record address information
    //     emit DebugParams(
    //         "Contract Addresses",
    //         0,
    //         0,
    //         dexInfo.router,                   // Router address
    //         dexInfo.factory                   // Factory address
    //     );
        
    //     emit DebugParams(
    //         "Token Addresses",
    //         0,
    //         0,
    //         dexInfo.weth,                     // WETH address
    //         address(rewardToken)              // Reward token address
    //     );
        
    //     emit DebugParams(
    //         "Control Addresses",
    //         0,
    //         0,
    //         owner(),                          // Contract owner
    //         msg.sender                        // Function caller
    //     );

    //     // Record timestamps
    //     emit DebugParams(
    //         "Timestamps",
    //         timestamps.startTimestamp,        // Start time
    //         timestamps.endTimestamp,          // End time
    //         address(0),
    //         address(0)
    //     );
        
    //     emit DebugParams(
    //         "More Timestamps",
    //         timestamps.unlockTimestamp,       // Unlock time
    //         block.timestamp,                  // Current time
    //         address(0),
    //         address(0)
    //     );
        
    //     // Record financial parameters
    //     emit DebugParams(
    //         "Financial Info",
    //         finInfo.tokenPrice,               // Token price in wei
    //         finInfo.listingPrice,             // Listing price in wei
    //         address(0),
    //         address(0)
    //     );
        
    //     emit DebugParams(
    //         "Cap Info",
    //         finInfo.softCap,                  // Soft cap
    //         finInfo.hardCap,                  // Hard cap
    //         address(0),
    //         address(0)
    //     );
        
    //     emit DebugParams(
    //         "LP Rate",
    //         finInfo.lpInterestRate,           // LP interest rate percentage
    //         totalInvestedETH,                 // Total invested ETH
    //         address(0),
    //         address(0)
    //     );

    //     // Calculate ETH allocation
    //     uint256 balance = address(this).balance;
        
    //     // Liquidity-related logic
    //     if (finInfo.lpInterestRate > 0 && finInfo.listingPrice > 0) {
    //         // Subtract msg.value (for locker fee)
    //         balance -= msg.value;
            
    //         // Calculate ETH for LP and ETH to withdraw
    //         uint256 ethForLP = (balance * finInfo.lpInterestRate) / 100;
    //         uint256 ethWithdraw = balance - ethForLP;
            
    //         // Calculate token amount needed for LP
    //         uint256 tokenAmount = getTokenAmount(ethForLP, finInfo.listingPrice);
            
    //         // Record calculated values
    //         emit DebugParams(
    //             "LP Calculation",
    //             ethForLP,                     // ETH for liquidity
    //             ethWithdraw,                  // ETH to withdraw
    //             address(0),
    //             address(0)
    //         );
            
    //         emit DebugParams(
    //             "Token Calculation",
    //             tokenAmount,                  // Token amount for LP
    //             msg.value,                    // Fee amount
    //             address(0),
    //             address(0)
    //         );
            
    //         // Check token allowance before approval
    //         uint256 allowanceBefore = rewardToken.allowance(address(this), dexInfo.router);
    //         emit DebugParams(
    //             "Allowance Before",
    //             allowanceBefore,              // Current allowance
    //             0,
    //             dexInfo.router,               // Router address
    //             address(0)
    //         );
            
    //         distributed = true;
    //         // Record expected parameters for addLiquidityETH
    //         emit AddLiquidityETHParams(
    //             address(rewardToken),         // Token address
    //             tokenAmount,                  // Token amount
    //             ethForLP,                     // ETH amount
    //             0,                            // Minimum token amount (0 = no slippage protection)
    //             0,                            // Minimum ETH amount (0 = no slippage protection)
    //             address(this),                // LP token recipient
    //             block.timestamp + 360         // Deadline (6 minutes)
    //         );
            
    //         // Check if LP locking is needed
    //         bool needsLock = timestamps.unlockTimestamp > block.timestamp;
    //         emit DebugParams(
    //             "LP Lock Status",
    //             needsLock ? 1 : 0,            // Whether locking is needed
    //             timestamps.unlockTimestamp,   // Unlock timestamp
    //             address(0),
    //             address(0)
    //         );
            
    //         // Try to get pair address if it exists
    //         try IUniswapV2Factory(dexInfo.factory).getPair(address(rewardToken), dexInfo.weth) returns (address pair) {
    //             emit DebugParams(
    //                 "Existing Pair",
    //                 pair != address(0) ? 1 : 0, // Whether pair exists
    //                 0,
    //                 pair,                     // Pair address
    //                 address(0)
    //             );
    //         } catch {
    //             emit DebugParams(
    //                 "Pair Check Failed",
    //                 0,
    //                 0,
    //                 address(0),
    //                 address(0)
    //             );
    //         }
            
    //         // Simulate LP token handling with mock liquidity
    //         uint256 mockLiquidity = 1000; // Example value
            
    //         if (needsLock) {
    //             // Record locker parameters
    //             emit TokenLockerParams(
    //                 address(0),               // LP token address (unknown yet)
    //                 "LP Token Locker",        // Locker name
    //                 mockLiquidity,            // LP amount (mock)
    //                 msg.sender,               // Owner
    //                 timestamps.unlockTimestamp, // Unlock time
    //                 msg.value                 // Fee amount
    //             );
                
    //             // Record ETH transfer parameters
    //             emit ETHTransferParams(
    //                 msg.sender,               // Recipient
    //                 ethWithdraw,              // Amount
    //                 true                      // Is lock fee
    //             );
    //         } else {
    //             // Record LP token transfer (without locking)
    //             emit DebugParams(
    //                 "LP Transfer",
    //                 mockLiquidity,            // LP amount (mock)
    //                 0,
    //                 msg.sender,               // Recipient
    //                 address(0)
    //             );
                
    //             // Record ETH transfer parameters
    //             emit ETHTransferParams(
    //                 msg.sender,               // Recipient
    //                 ethWithdraw + msg.value,  // Amount (including msg.value)
    //                 false                     // Not a lock fee
    //             );
    //         }
    //     } else {
    //         // If no liquidity addition, record direct ETH transfer
    //         emit ETHTransferParams(
    //             msg.sender,                   // Recipient
    //             balance,                      // Full balance
    //             false                         // Not a lock fee
    //         );
    //     }
        
    //     // Record gas information
    //     emit DebugParams(
    //         "Gas Info",
    //         gasleft(),                        // Remaining gas
    //         block.gaslimit,                   // Block gas limit
    //         address(0),
    //         address(0)
    //     );
    // }

    function withdrawETH() external payable onlyOwner {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH >= finInfo.softCap, "The IDO pool did not reach soft cap.");
        require(!distributed, "Already distributed.");

        // This forwards all available gas. Be sure to check the return value!
        uint256 balance = address(this).balance;

        if ( finInfo.lpInterestRate > 0 && finInfo.listingPrice > 0 ) {
            // if TokenLockerFactory has fee we should provide there fee by msg.value and sub it from balance for correct execution
            balance -= msg.value;
            uint256 ethForLP = (balance * finInfo.lpInterestRate)/100;
            uint256 ethWithdraw = balance - ethForLP;

            uint256 tokenAmount = getTokenAmount(ethForLP, finInfo.listingPrice);

            // Add Liquidity ETH
            IUniswapV2Router02 uniswapRouter = IUniswapV2Router02(dexInfo.router);
            rewardToken.approve(address(uniswapRouter), tokenAmount);
            // (,, uint liquidity) = uniswapRouter.addLiquidityETH{value: ethForLP}(
            //     address(rewardToken),
            //     tokenAmount,
            //     0, // slippage is unavoidable
            //     0, // slippage is unavoidable
            //     address(this),
            //     block.timestamp + 360
            // );

            uint256 liquidity = 0;
            emit AddLiquidityETHParams(
                address(rewardToken),         // Token address
                tokenAmount,                  // Token amount
                ethForLP,                     // ETH amount
                0,                            // Minimum token amount (0 = no slippage protection)
                0,                            // Minimum ETH amount (0 = no slippage protection)
                address(this),                // LP token recipient
                block.timestamp + 360         // Deadline (6 minutes)
            );
            

            // Lock LP Tokens
            (address lpTokenAddress) = IUniswapV2Factory(dexInfo.factory).getPair(address(rewardToken), dexInfo.weth);

            ERC20 lpToken = ERC20(lpTokenAddress);

            if (timestamps.unlockTimestamp > block.timestamp) {
                lpToken.approve(address(lockerFactory), liquidity);
                lockerFactory.createLocker{value: msg.value}(
                    lpToken,
                    string.concat(lpToken.symbol(), " tokens locker"),
                    liquidity, msg.sender, timestamps.unlockTimestamp
                );
            } else {
                lpToken.transfer(msg.sender, liquidity);
                // return msg.value along with eth to output if someone sent it wrong
                ethWithdraw += msg.value;
            }

            // Withdraw rest ETH
            (bool success, ) = msg.sender.call{value: ethWithdraw}("");
            require(success, "Transfer failed.");
        } else {
            (bool success, ) = msg.sender.call{value: balance}("");
            require(success, "Transfer failed.");
        }

        distributed = true;
    }

     function withdrawNotSoldTokens() external onlyOwner {
        require(distributed, "Withdraw allowed after distributed.");

        uint256 balance = getNotSoldToken();
        require(balance > 0, "The IDO pool has not unsold tokens.");
        rewardToken.safeTransfer(msg.sender, balance);
    }

    function getNotSoldToken() public view returns(uint256){
        uint256 balance = rewardToken.balanceOf(address(this));
        return balance.add(distributedTokens).sub(tokensForDistribution);
    }

    function refundTokens() external onlyOwner {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH < finInfo.softCap, "The IDO pool has reach soft cap.");

        uint256 balance = rewardToken.balanceOf(address(this));
        require(balance > 0, "The IDO pool has not refund tokens.");
        rewardToken.safeTransfer(msg.sender, balance);
    }

    function getTokenAmount(uint256 ethAmount, uint256 oneTokenInWei)
        internal
        view
        returns (uint256)
    {
        return (ethAmount / oneTokenInWei) * 10**decimals;
    }

    /**
     * @notice It allows the owner to recover wrong tokens sent to the contract
     * @param _tokenAddress: the address of the token to withdraw with the exception of rewardToken
     * @param _tokenAmount: the number of token amount to withdraw
     * @dev Only callable by owner.
     */
    function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount) external onlyOwner {
        require(_tokenAddress != address(rewardToken));
        ERC20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount);
    }
}
          

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";

/**
 * @title IDOToken
 * @notice Standard ido token
 */
contract IDOToken is ERC20Burnable {
    constructor(
        string memory name,
        string memory symbol,
        uint256 totalSupply,
        address recipient
    ) ERC20(name, symbol) {
        _mint(recipient, totalSupply);
    }
}
          

pragma solidity >=0.5.0;

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 ^0.8.0;

import "../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.
 *
 * By default, the owner account will be the one that deploys the contract. 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;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _setOwner(_msgSender());
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _setOwner(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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * Requirements:
     *
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);

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

        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `sender` to `recipient`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

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

        emit Transfer(sender, recipient, amount);

        _afterTokenTransfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

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

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

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

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

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

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

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

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

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

    /**
     * @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);
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../ERC20.sol";
import "../../../utils/Context.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 currentAllowance = allowance(account, _msgSender());
        require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
        unchecked {
            _approve(account, _msgSender(), currentAllowance - amount);
        }
        _burn(account, amount);
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
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

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 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 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @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).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @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;
    }
}
          

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}
          

pragma solidity >=0.6.2;

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);
}
          

pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

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;
}
          

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract TokenLocker is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    ERC20 public token;
    address public withdrawer;
    uint256 public withdrawTime;
    string public name;

    event withdrawTokenEvent(uint256 timestamp, uint256 amount);

    constructor(
        ERC20 _token,
        string memory _name,
        address _withdrawer,
        uint256 _withdrawTime
    ){
        require(_withdrawTime > block.timestamp, "withdraw time should be more than now");

        token = _token;
        name = _name;
        withdrawer = _withdrawer;
        withdrawTime = _withdrawTime;
    }

    function _processWithdraw(uint256 amount) internal {
        require(msg.sender == withdrawer, "You are not withdrawer");
        require(block.timestamp > withdrawTime, "Not time yet");
        token.safeTransfer(msg.sender, amount);
        emit withdrawTokenEvent(block.timestamp, amount);
    }

    function withdrawToken(uint256 amount) public {
        require(amount <= token.balanceOf(address(this)), "Withdraw amount exceeds balance");
        _processWithdraw(amount);
    }

    function withdrawTokenAll() public {
        uint256 amount = token.balanceOf(address(this));
        _processWithdraw(amount);
    }

    function tokenRemaining() public view returns(uint256){
        return token.balanceOf(address(this));
    }
}
          

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./TokenLocker.sol";

contract TokenLockerFactory is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    uint256 public lockerCount = 0;
    uint256 public fee = 0;

    struct lockerInfo {
        uint256 lockerId;
        address tokenAddress;
        address creator;
        uint256 ramaining;
        address withdrawer;
        uint256 withdrawTime;
    }

    address[] public lockerAddresses;

    mapping(address => address[]) public creatorLockers;
    mapping(address => address[]) public tokenLockers;

    event LockerCreated(uint256 lockerId, address indexed lockerAddress, address tokenAddress);
    event FeeUpdated(uint256 oldFee, uint256 newFee);

    constructor(){}

    function getLockerAddresses() public view returns (address[] memory) {
      return lockerAddresses;
    }

    function createLocker(
        ERC20 _tokenAddress,
        string memory _name,
        uint256 _lockAmount,
        address _withdrawer,
        uint256 _withdrawTime
        ) payable public returns(address){
        require(msg.value == fee, 'Fee amount is required');
        require(_lockAmount > 0, 'Lock amount must be greater than 0');
        require(_withdrawer != address(0), 'Withdrawer cannot be zero address');

        TokenLocker tokenLocker = new TokenLocker(_tokenAddress, _name, _withdrawer, _withdrawTime);
        tokenLocker.transferOwnership(msg.sender);

        _tokenAddress.safeTransferFrom(
                msg.sender,
                address(tokenLocker),
                _lockAmount
            );

        lockerAddresses.push(address(tokenLocker));

        creatorLockers[msg.sender].push(address(tokenLocker));
        tokenLockers[address(_tokenAddress)].push(address(tokenLocker));

        emit LockerCreated(lockerCount, address(tokenLocker), address(_tokenAddress));
        lockerCount++;
        return address(tokenLocker);

    }

    function withdrawFee() public onlyOwner{
        (bool success, ) = msg.sender.call{value: address(this).balance}("");
        require(success, "Transfer failed.");
    }

    function setFee(uint256 amount) public onlyOwner{
        uint256 oldFee = fee;
        fee = amount;
        emit FeeUpdated(oldFee, amount);
    }

    function getLockersByCreator(address creator) public view returns (address[] memory) {
        return creatorLockers[creator];
    }

    function getLockersByToken(address tokenAddress) public view returns (address[] memory) {
        return tokenLockers[tokenAddress];
    }
}