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Withdraw Tokens244913332026-02-19 13:56:354 days ago1771509395IN
0xb4E96E46...f3Eac6830
0 ETH0.000089062.24386305
Set Referral Rew...244911442026-02-19 13:18:354 days ago1771507115IN
0xb4E96E46...f3Eac6830
0 ETH0.000004060.16169251
Set Active Round244910222026-02-19 12:54:114 days ago1771505651IN
0xb4E96E46...f3Eac6830
0 ETH0.000217722.08333761
Add Round244910052026-02-19 12:50:474 days ago1771505447IN
0xb4E96E46...f3Eac6830
0 ETH0.000340392.1081786
Deactivate Activ...244909212026-02-19 12:33:594 days ago1771504439IN
0xb4E96E46...f3Eac6830
0 ETH0.000072332.18559475
Set Active Round244899742026-02-19 9:23:595 days ago1771493039IN
0xb4E96E46...f3Eac6830
0 ETH0.000266192.54709812
Edit Round244899652026-02-19 9:22:115 days ago1771492931IN
0xb4E96E46...f3Eac6830
0 ETH0.000130182.54501613
Add Round244899622026-02-19 9:21:355 days ago1771492895IN
0xb4E96E46...f3Eac6830
0 ETH0.000411622.54990203
Add Round244899012026-02-19 9:09:235 days ago1771492163IN
0xb4E96E46...f3Eac6830
0 ETH0.000412822.55736921
Edit Round244899002026-02-19 9:09:115 days ago1771492151IN
0xb4E96E46...f3Eac6830
0 ETH0.000145072.55629461
Sync Active Roun...244898992026-02-19 9:08:595 days ago1771492139IN
0xb4E96E46...f3Eac6830
0 ETH0.000061062.55693188
Edit Round244898942026-02-19 9:07:595 days ago1771492079IN
0xb4E96E46...f3Eac6830
0 ETH0.000145092.55655248
Edit Round244898902026-02-19 9:07:115 days ago1771492031IN
0xb4E96E46...f3Eac6830
0 ETH0.000145292.56007687
Edit Round244898872026-02-19 9:06:355 days ago1771491995IN
0xb4E96E46...f3Eac6830
0 ETH0.000137842.55478822
Add Round244898812026-02-19 9:05:235 days ago1771491923IN
0xb4E96E46...f3Eac6830
0 ETH0.00041082.54483083
Deactivate Activ...244897242026-02-19 8:33:475 days ago1771490027IN
0xb4E96E46...f3Eac6830
0 ETH0.000084992.56823516
Set Active Round244839292026-02-18 13:10:115 days ago1771420211IN
0xb4E96E46...f3Eac6830
0 ETH0.000266972.5545573
Edit Round244838892026-02-18 13:02:115 days ago1771419731IN
0xb4E96E46...f3Eac6830
0 ETH0.000137732.55103934
Edit Round244838812026-02-18 13:00:355 days ago1771419635IN
0xb4E96E46...f3Eac6830
0 ETH0.00013062.55137891
Edit Round244838792026-02-18 13:00:115 days ago1771419611IN
0xb4E96E46...f3Eac6830
0 ETH0.000137842.55312542
Add Round244838642026-02-18 12:57:115 days ago1771419431IN
0xb4E96E46...f3Eac6830
0 ETH0.000454412.54486603
Transfer Ownersh...244836772026-02-18 12:19:475 days ago1771417187IN
0xb4E96E46...f3Eac6830
0 ETH0.00006172.06606846
Transfer Ownersh...244772192026-02-17 14:42:116 days ago1771339331IN
0xb4E96E46...f3Eac6830
0 ETH0.000063072.1118684

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Contract Source Code Verified (Exact Match)

Contract Name:
Presale

Compiler Version
v0.8.24+commit.e11b9ed9

Optimization Enabled:
Yes with 200 runs

Other Settings:
paris EvmVersion
File 1 of 13 : TorchIDO.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
import "@openzeppelin/contracts/utils/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";


/// @title Presale Contract
/// @notice Referral system is intentionally irreversible and owner-controlled.
/// @dev Design decisions:
/// - Referrer can be set only once and cannot be changed
/// - Owner can disable or reactivate referrals
/// - Referral removal permanently disables future rewards
/// This introduces intentional centralized control and is not a vulnerability.


contract Presale is ReentrancyGuard, Pausable, Ownable {
    using SafeERC20 for IERC20Metadata;

    IERC20Metadata public immutable presaleToken;
    IERC20Metadata public immutable usdcToken;
    IERC20Permit public immutable usdcPermit;
    
    address public liqHolder;
    uint256 public minPurchaseTokens;
    uint256 public totalRounds;
    uint256 public nextRoundId = 1;
    uint256 public constant MAX_REFERRAL_DEPTH = 10;
    uint256 public activeRoundId;
    uint256 public constant PERCENTAGE_BASE = 10000;
    uint256 public referralRewardPercentage = 100;
    bool public referralRewardsEnabled = true;
    uint256 public totalReferralRewardsGiven = 0;
    uint256 public referralCapPercentage = 500;
    uint256 public maxReferralRewardsCap;
    uint8 public immutable tokenDecimals;
    uint8 public immutable usdcDecimals;
    address public timelock;
    uint256 public totalTokensSold;
    uint256 public maxRoundDuration;

    /// @notice TIMING FIX: Minimum delay before a round can start (prevents same-block DoS)
    uint256 public constant MINIMUM_ACTIVATION_DELAY = 60; // 60 seconds minimum delay
    
    /// @notice Track only active round allocation (not cumulative)
    uint256 public activeRoundUnsoldAllocation;

    /// @notice Single flag to prevent referrer reassignment
    mapping(address => bool) public referrerLocked;
    
    /// @notice Track admin-deactivated referrals
    mapping(address => mapping(address => bool)) public adminDeactivated;
    
    enum RoundState {
        Pending,
        Active,
        Ended
    }

    struct User {
        uint256 totalPurchased;
        uint256 totalDepositUSDC;
        uint256 totalReferralRewards;
        uint256 referralCount;
        address referrer;
    }

    struct Round {
        uint256 roundId;
        uint256 startTime;
        uint256 endTime;
        uint256 tokenPriceUSDC;
        uint256 tokensSold;
        uint256 cap;
        RoundState state;
    }

    /// @notice Single source of truth for referral data
    struct ReferralInfo {
        address referee;
        uint256 referredDate;
        bool isActive;
        uint256 firstPurchaseDate;
        // arrayIndex removed - redundant with referralInfoIndex mapping
    }

    mapping(address => User) public usersInfo;
    mapping(uint256 => Round) public rounds;
    
    /// @notice Single referral data structure with proper indexing
    mapping(address => ReferralInfo[]) public referralInfoList;
    mapping(address => mapping(address => uint256)) private referralInfoIndex; // 1-based index
    
    address[] public referrersList;
    mapping(address => bool) public isReferrer;

    event RoundAdded(uint256 indexed roundId, uint256 startTime, uint256 endTime, uint256 price, uint256 cap);
    event RoundEdited(
        uint256 indexed roundId,
        uint256 startTime,
        uint256 endTime,
        uint256 price,
        RoundState state,
        uint256 cap
    );
    event TokensPurchased(address indexed buyer, uint256 indexed roundId, uint256 usdcAmount, uint256 tokensBought);
    event ReferralRewardPaid(address indexed referrer, address indexed referee, uint256 rewardAmount, uint256 roundId);
    event ReferralRewardCapped(address indexed referrer, address indexed referee, uint256 intendedReward, uint256 actualReward);
    event ReferralSet(address indexed user, address indexed referrer);
    event RoundActivated(uint256 indexed roundId);
    event RoundEnded(uint256 indexed roundId);
    event ReferralStatusUpdated(address indexed referrer, address indexed referee, bool isActive, uint256 firstPurchaseDate);
    event ReferralReactivated(address indexed referrer, address indexed referee);
    event ReferralRemoved(address indexed referrer, address indexed referee);
    event LiqHolderUpdated(address newLiqHolder);
    event Withdraw(address to, uint256 amount);
    event TokensRescued(address indexed token, address indexed to, uint256 amount);
    event ActiveRoundAllocationUpdated(uint256 newAllocation);
    event MinimumActivationDelayUpdated(uint256 newDelay);

    modifier onlyOwnerOrTimelock() {
        require(msg.sender == owner() || msg.sender == timelock, "Presale: caller is not owner or timelock");
        _;
    }

    constructor(address _liqHolder, address _usdcToken, address _token) Ownable(msg.sender) {
        require(_token != address(0), "Presale: Invalid token address");
        require(_liqHolder != address(0) && _usdcToken != address(0), "Presale: Invalid address");
        require(!_hasCode(_liqHolder), "Presale: liqHolder cannot be a contract");

        presaleToken = IERC20Metadata(_token);
        usdcToken = IERC20Metadata(_usdcToken);
        usdcPermit = IERC20Permit(_usdcToken);
        liqHolder = _liqHolder;

        uint8 _tokenDecimals = presaleToken.decimals();
        uint8 _usdcDecimals = usdcToken.decimals();
        require(_tokenDecimals <= 18, "Presale: Token decimals must be <= 18");
        require(_usdcDecimals <= 18, "Presale: USDC decimals must be <= 18");

        tokenDecimals = _tokenDecimals;
        usdcDecimals = _usdcDecimals;
        maxRoundDuration = 90 days;
        minPurchaseTokens = 100 * (10 ** _tokenDecimals);
        _updateReferralCap();
    }

    /// @notice Referrer assignment is one-time and permanently locked.
    /// @dev Once set or skipped, referrer cannot be changed under any circumstance.
    function _assignReferrer(address _buyer, address _referrer) internal {
        // If no referrer provided or already locked, return
        if (_referrer == address(0)) {
            if (!referrerLocked[_buyer]) {
                referrerLocked[_buyer] = true; // Lock with no referrer
            }
            return;
        }

        // Prevent reassignment
        if (referrerLocked[_buyer]) {
            if (usersInfo[_buyer].referrer == _referrer) {
                return; // Same referrer, OK
            }
            revert("Presale: Referrer already locked");
        }

        // Validation
        require(_referrer != _buyer, "Presale: Cannot refer yourself");
        require(!_hasCode(_buyer), "Presale: Buyer cannot be a contract");
        require(!_hasCode(_referrer), "Presale: Referrer cannot be a contract");
        require(!_wouldCreateReferralCycle(_buyer, _referrer), "Presale: Referral cycle detected");
        
        // Revert if admin deactivated this relationship
        require(!adminDeactivated[_referrer][_buyer], "Presale: Referral deactivated by admin");

        // Set referrer and lock
        usersInfo[_buyer].referrer = _referrer;
        referrerLocked[_buyer] = true;

        // Update single source of truth with proper indexing
        ReferralInfo memory newReferral = ReferralInfo({
            referee: _buyer,
            referredDate: block.timestamp,
            isActive: false,
            firstPurchaseDate: 0
        });

        referralInfoList[_referrer].push(newReferral);
        // Use 1-based indexing (0 means not found)
        referralInfoIndex[_referrer][_buyer] = referralInfoList[_referrer].length;

        if (!isReferrer[_referrer]) {
            isReferrer[_referrer] = true;
            referrersList.push(_referrer);
        }
        
        emit ReferralSet(_buyer, _referrer);
    }

    /// @notice Returns active referrer or activates on first purchase
    /// @return referrer address if active and valid, address(0) otherwise
    function _getOrActivateReferrer(address _buyer) internal returns (address) {
        address referrer = usersInfo[_buyer].referrer;
        
        // No referrer assigned
        if (referrer == address(0)) return address(0);
        
        // Rewards disabled globally
        if (!referralRewardsEnabled || referralRewardPercentage == 0) return address(0);
        
        // Admin deactivated
        if (adminDeactivated[referrer][_buyer]) return address(0);
        
        uint256 index = referralInfoIndex[referrer][_buyer];
        if (index == 0) return address(0); // Not in list
        
        ReferralInfo storage refInfo = referralInfoList[referrer][index - 1];
        
        // Activate on first purchase if not yet active
        if (!refInfo.isActive) {
            refInfo.isActive = true;
            refInfo.firstPurchaseDate = block.timestamp;
            emit ReferralStatusUpdated(referrer, _buyer, true, block.timestamp);
        }
        
        return referrer;
    }

    function _normalizeDecimals(uint256 amount, uint8 fromDecimals, uint8 toDecimals) internal pure returns (uint256) {
        if (fromDecimals == toDecimals) return amount;
        if (fromDecimals < toDecimals) return amount * (10 ** (toDecimals - fromDecimals));
        return amount / (10 ** (fromDecimals - toDecimals));
    }

    function _calculateTokenAmount(uint256 _usdcAmount, uint256 _priceUSDC) internal view returns (uint256) {
        require(_usdcAmount > 0 && _priceUSDC > 0, "Presale: Invalid amounts");
        uint256 usdcAmount18 = _normalizeDecimals(_usdcAmount, usdcDecimals, 18);
        return (usdcAmount18 * (10 ** tokenDecimals)) / _priceUSDC;
    }

    function _hasCode(address account) internal view returns (bool) {
        uint256 size;
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    function _wouldCreateReferralCycle(address user, address referrer) 
        internal view returns (bool) 
    {
        address current = referrer;

        // @dev Allow chains up to MAX_REFERRAL_DEPTH inclusive
        for (uint256 i = 0; i <= MAX_REFERRAL_DEPTH; i++) {
            if (current == address(0)) return false;
            if (current == user) return true;
            current = usersInfo[current].referrer;
        }

        return true; // Exceeded allowed depth
    }


    /// @notice Sync active round and update allocation
    function _syncRoundState(uint256 _roundId) internal {
        if (_roundId == 0) return;

        Round storage r = rounds[_roundId];

        if (
            r.state == RoundState.Active &&
            (block.timestamp > r.endTime || r.tokensSold >= r.cap)
        ) {
            r.state = RoundState.Ended;
            activeRoundId = 0;
            activeRoundUnsoldAllocation = 0;

            emit ActiveRoundAllocationUpdated(0);
            emit RoundEnded(_roundId);
        }
    }

    function _buyWithUsdc(uint256 _usdcAmount, address _referrer) private {
        Round storage round = _getActiveRoundForPurchase();
        require(_usdcAmount > 0, "Presale: Amount must be > 0");
        require(
            usdcToken.allowance(msg.sender, address(this)) >= _usdcAmount,
            "Presale: Insufficient allowance"
        );

        uint256 tokensToBuy = _calculateTokenAmount(_usdcAmount, round.tokenPriceUSDC);
        require(tokensToBuy >= minPurchaseTokens, "Presale: Below minimum purchase");

        // USDC goes directly to liquidity holder
        usdcToken.safeTransferFrom(msg.sender, liqHolder, _usdcAmount);
        usersInfo[msg.sender].totalDepositUSDC += _usdcAmount;

        // Assign referrer (one-time)
        _assignReferrer(msg.sender, _referrer);

        // All cap + referral logic handled here
        _purchaseTokens(msg.sender, round, tokensToBuy, _usdcAmount);
    }

    /// @notice FIX: Corrected purchase logic addressing both CertiK findings
    /// @dev Changes:
    /// 1. Calculate actual referral reward (after global cap) BEFORE round cap check
    /// 2. Validate inventory BEFORE any token transfers
    function _purchaseTokens(
        address _buyer,
        Round storage _round,
        uint256 _tokensToBuy,
        uint256 _usdcAmount
    ) private {
        // STEP 1: Get or activate referrer
        address activeReferrer = _getOrActivateReferrer(_buyer);

        // STEP 2: Calculate intended referral reward
        uint256 intendedReward = 0;
        if (activeReferrer != address(0)) {
            intendedReward = (_tokensToBuy * referralRewardPercentage) / PERCENTAGE_BASE;
        }

        // STEP 3: Apply global referral cap to get ACTUAL referral reward
        // FIX #1: Calculate the actual reward amount considering global cap
        uint256 referralReward = 0;
        if (activeReferrer != address(0) && intendedReward > 0) {
            uint256 projected = totalReferralRewardsGiven + intendedReward;

            if (projected > maxReferralRewardsCap) {
                // Cap the reward to what's remaining in global cap
                intendedReward = maxReferralRewardsCap > totalReferralRewardsGiven
                    ? maxReferralRewardsCap - totalReferralRewardsGiven
                    : 0;
            }

            referralReward = intendedReward;
        }

        // STEP 4: Enforce round cap using ACTUAL referral reward (not intended)
        // FIX #1: Now using the actual referralReward after global cap adjustment
        require(
            _round.tokensSold + _tokensToBuy + referralReward <= _round.cap,
            "Presale: Exceeds round cap including referral rewards"
        );

        // STEP 5: Total distributed = buyer + actual referral
        uint256 totalDistributed = _tokensToBuy + referralReward;

        // STEP 6: Ensure contract has enough tokens BEFORE any transfers
        // FIX #2: Check balance before transfers, not after
        require(
            presaleToken.balanceOf(address(this)) >= totalDistributed,
            "Presale: Insufficient balance"
        );

        // STEP 7: Transfer tokens to buyer
        presaleToken.safeTransfer(_buyer, _tokensToBuy);

        // STEP 8: Transfer referral reward if applicable
        if (referralReward > 0) {
            usersInfo[activeReferrer].totalReferralRewards += referralReward;
            usersInfo[activeReferrer].referralCount++;
            totalReferralRewardsGiven += referralReward;

            presaleToken.safeTransfer(activeReferrer, referralReward);

            emit ReferralRewardPaid(
                activeReferrer,
                _buyer,
                referralReward,
                _round.roundId
            );
        }

        // STEP 9: Update round + global accounting
        _round.tokensSold += totalDistributed;
        usersInfo[_buyer].totalPurchased += _tokensToBuy;
        totalTokensSold += totalDistributed;

        // STEP 10: Update active round allocation
        require(
            activeRoundUnsoldAllocation >= totalDistributed,
            "Presale: Insufficient round allocation"
        );

        activeRoundUnsoldAllocation -= totalDistributed;
        emit ActiveRoundAllocationUpdated(activeRoundUnsoldAllocation);

        // STEP 11: Emit purchase event
        emit TokensPurchased(
            _buyer,
            _round.roundId,
            _usdcAmount,
            _tokensToBuy
        );
    }

    function buyWithUsdc(uint256 _usdcAmount) external nonReentrant whenNotPaused {
        syncActiveRound();
        _buyWithUsdc(_usdcAmount, address(0));
    }

    function buyWithUsdcWithReferral(uint256 _usdcAmount, address _referrer) external nonReentrant whenNotPaused {
        syncActiveRound();
        _buyWithUsdc(_usdcAmount, _referrer);
    }

    function buyWithUsdcPermit(uint256 _usdcAmount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) 
        external nonReentrant whenNotPaused 
    {
        require(deadline >= block.timestamp, "Presale: Permit expired");
        syncActiveRound();
        _buyWithUsdcPermit(_usdcAmount, address(0), deadline, v, r, s);
    }

    function buyWithUsdcPermitWithReferral(uint256 _usdcAmount, address _referrer, uint256 deadline, uint8 v, bytes32 r, bytes32 s) 
        external nonReentrant whenNotPaused 
    {
        require(deadline >= block.timestamp, "Presale: Permit expired");
        syncActiveRound();
        _buyWithUsdcPermit(_usdcAmount, _referrer, deadline, v, r, s);
    }

    function _buyWithUsdcPermit(uint256 _usdcAmount, address _referrer, uint256 deadline, uint8 v, bytes32 r, bytes32 s) private {
        usdcPermit.permit(msg.sender, address(this), _usdcAmount, deadline, v, r, s);
        _buyWithUsdc(_usdcAmount, _referrer);
    }

    /// @notice TIMING FIX: Add round without immediate activation option
    /// @dev Rounds must be created with sufficient buffer before start time
    function addRound(
        uint256 _startTime, 
        uint256 _endTime, 
        uint256 _tokenPriceUSDC, 
        uint256 _cap
    ) external onlyOwner {
        uint256 _roundId = nextRoundId++;
        require(rounds[_roundId].roundId == 0, "Presale: Round exists");
        require(_startTime < _endTime && _tokenPriceUSDC > 0 && _cap > 0, "Presale: Invalid params");
        
        // TIMING FIX: Enforce minimum delay before round can start
        require(
            _startTime > block.timestamp + MINIMUM_ACTIVATION_DELAY,
            "Presale: Start time must be after minimum delay"
        );
        
        require(_endTime > block.timestamp, "Presale: Invalid time");
        require(_endTime - _startTime <= maxRoundDuration, "Presale: Duration exceeds max");

        // Only check direct balance vs cap (no cross-round accounting)
        uint256 contractBal = presaleToken.balanceOf(address(this));
        require(_cap <= contractBal, "Presale: Insufficient inventory");
 
        // if (_roundId > 1) {
        //     require(
        //         _startTime > rounds[_roundId - 1].endTime,
        //         "Presale: Round time must be strictly increasing"
        //     );
        // }

        rounds[_roundId] = Round({
            roundId: _roundId,  
            startTime: _startTime,
            endTime: _endTime,
            tokenPriceUSDC: _tokenPriceUSDC,
            tokensSold: 0,
            cap: _cap,
            state: RoundState.Pending
        });

        totalRounds++;
        emit RoundAdded(_roundId, _startTime, _endTime, _tokenPriceUSDC, _cap);
    }

    function editRound(uint256 _roundId, uint256 _startTime, uint256 _endTime, uint256 _tokenPriceUSDC, uint256 _cap) external onlyOwner {
        _editRoundInternal(_roundId, _startTime, _endTime, _tokenPriceUSDC, _cap);
    }

    function _editRoundInternal(
        uint256 _roundId, 
        uint256 _startTime, 
        uint256 _endTime, 
        uint256 _tokenPriceUSDC, 
        uint256 _cap
    ) internal {
        require(rounds[_roundId].roundId != 0, "Presale: Round not found");
        _syncRoundState(_roundId);

        Round storage round = rounds[_roundId];

        require(
            round.state == RoundState.Pending,
            "Presale: Only pending rounds editable"
        );

        require(_startTime < _endTime && _tokenPriceUSDC > 0 && _cap > 0, "Presale: Invalid params");
        
        // TIMING FIX: Enforce minimum delay for edited rounds too
        require(
            _startTime > block.timestamp + MINIMUM_ACTIVATION_DELAY,
            "Presale: Start time must be after minimum delay"
        );
        
        require(_endTime - _startTime <= maxRoundDuration, "Presale: Duration exceeds max");
        require(_cap >= round.tokensSold, "Presale: Cap below sold tokens");

        // Only check direct balance vs new cap (stateless, local)
        uint256 contractBal = presaleToken.balanceOf(address(this));
        require(_cap <= contractBal, "Presale: Insufficient inventory");

        round.cap = _cap;
        round.startTime = _startTime;
        round.endTime = _endTime;
        round.tokenPriceUSDC = _tokenPriceUSDC;

        emit RoundEdited(
            _roundId,
            _startTime,
            _endTime,
            _tokenPriceUSDC,
            round.state,
            _cap
        );
    }

    /// @notice TIMING FIX: Separate activation function with proper timing checks
    /// @dev Can only activate a pending round within its valid time window
    function setActiveRound(uint256 _roundId) external onlyOwner {
        require(_roundId > 0 && _roundId < nextRoundId, "Presale: Invalid round id");

        Round storage r = rounds[_roundId];

        // Enforce monotonic lifecycle - only PENDING rounds can be activated
        require(r.state == RoundState.Pending, "Presale: Round already used");

        // TIMING FIX: More flexible activation window
        // Allow activation if we're past the minimum delay but before end time
        require(
            block.timestamp >= r.startTime - MINIMUM_ACTIVATION_DELAY &&
            block.timestamp <= r.endTime,
            "Presale: Round timing invalid for activation"
        );

        // End currently active round permanently
        if (activeRoundId != 0) {
            Round storage prev = rounds[activeRoundId];
            prev.state = RoundState.Ended;
            emit RoundEnded(activeRoundId);
        }

        // Activate new round
        r.state = RoundState.Active;
        activeRoundId = _roundId;

        // Set allocation strictly from this round
        activeRoundUnsoldAllocation = r.cap - r.tokensSold;
        emit ActiveRoundAllocationUpdated(activeRoundUnsoldAllocation);

        emit RoundActivated(_roundId);
    }

    /// @notice Clear allocation when deactivating
    function deactivateActiveRound() external onlyOwner {
        require(activeRoundId != 0, "Presale: No active round");

        uint256 old = activeRoundId;
        Round storage r = rounds[old];

        r.state = RoundState.Ended; // permanently ended
        activeRoundId = 0;
        activeRoundUnsoldAllocation = 0;

        emit ActiveRoundAllocationUpdated(0);
        emit RoundEnded(old);
    }

    function syncActiveRound() public {
        if (activeRoundId == 0) return;

        Round storage r = rounds[activeRoundId];

        if (
            r.state == RoundState.Active &&
            (block.timestamp > r.endTime || r.tokensSold >= r.cap)
        ) {
            r.state = RoundState.Ended;
            activeRoundId = 0;
            activeRoundUnsoldAllocation = 0;

            emit ActiveRoundAllocationUpdated(0);
            emit RoundEnded(r.roundId);
        }
    }

    function _getActiveRoundForPurchase() internal view returns (Round storage) {
        require(activeRoundId != 0, "Presale: No active round");
        Round storage r = rounds[activeRoundId];
        require(
            r.state == RoundState.Active &&
            block.timestamp >= r.startTime &&
            block.timestamp <= r.endTime &&
            r.tokensSold < r.cap,
            "Presale: Round unavailable"
        );

        return r;
    }

    /// @notice Owner can disable a referral relationship.
    /// @dev Future rewards will stop; this is a centralized design choice.
    function deactivateReferral(address _referrer, address _referee) external onlyOwner {
        require(usersInfo[_referee].referrer == _referrer, "Presale: Invalid relationship");
        
        uint256 index = referralInfoIndex[_referrer][_referee];
        require(index > 0, "Presale: Referral not found");

        ReferralInfo storage info = referralInfoList[_referrer][index - 1];
        require(info.referee == _referee, "Presale: Index mismatch");

        info.isActive = false;
        adminDeactivated[_referrer][_referee] = true;
        
        emit ReferralStatusUpdated(_referrer, _referee, false, 0);
    }

    /// @notice Admin can reactivate previously deactivated referral
    function reactivateReferral(address _referrer, address _referee) external onlyOwner {
        require(usersInfo[_referee].referrer == _referrer, "Presale: Invalid relationship");
        require(adminDeactivated[_referrer][_referee], "Presale: Not deactivated");

        uint256 index = referralInfoIndex[_referrer][_referee];
        require(index > 0, "Presale: Referral not found");
        
        ReferralInfo storage info = referralInfoList[_referrer][index - 1];

        info.isActive = true;
        adminDeactivated[_referrer][_referee] = false;
        
        emit ReferralReactivated(_referrer, _referee);
        emit ReferralStatusUpdated(_referrer, _referee, true, info.firstPurchaseDate);
    }

    /// @notice Permanently disables referral rewards for a referee.
    /// @dev Does NOT allow referrer reassignment.
    /// This behavior is intentional and owner-controlled.
    function removeReferral(address _referrer, address _referee) external onlyOwner {
        require(usersInfo[_referee].referrer == _referrer, "Presale: Invalid relationship");

        uint256 index = referralInfoIndex[_referrer][_referee];
        require(index > 0, "Presale: Referral not found");

        ReferralInfo[] storage list = referralInfoList[_referrer];
        uint256 arrayIndex = index - 1;
        uint256 lastIndex = list.length - 1;

        if (arrayIndex != lastIndex) {
            ReferralInfo storage lastRef = list[lastIndex];
            list[arrayIndex] = lastRef;
            // Update mapping to reflect new position (1-based index)
            referralInfoIndex[_referrer][lastRef.referee] = arrayIndex + 1;
        }

        list.pop();
        delete referralInfoIndex[_referrer][_referee];

        // Full state cleanup
        usersInfo[_referee].referrer = address(0);
        adminDeactivated[_referrer][_referee] = false;

        emit ReferralRemoved(_referrer, _referee);
    }

    function setMinPurchaseTokens(uint256 _amount) external onlyOwner {
        require(_amount > 0, "Presale: Invalid min");
        minPurchaseTokens = _amount;
    }

    function updateLiqHolder(address newLiqHolder) external onlyOwnerOrTimelock {
        require(newLiqHolder != address(0) && !_hasCode(newLiqHolder), "Presale: Invalid");
        liqHolder = newLiqHolder;
        emit LiqHolderUpdated(newLiqHolder);
    }

    function setTimelock(address _timelock) external onlyOwner {
        require(_timelock != address(0), "Presale: Invalid timelock");
        timelock = _timelock;
    }

    function setReferralRewardPercentage(uint256 _percentage) external onlyOwner {
        require(_percentage <= 2000, "Presale: Max 20%");
        referralRewardPercentage = _percentage;
    }

    function setReferralRewardsEnabled(bool _enabled) external onlyOwner {
        referralRewardsEnabled = _enabled;
    }

    function setReferralCapPercentage(uint256 _percentage) external onlyOwner {
        require(_percentage <= 2000, "Presale: Max 20%");
        referralCapPercentage = _percentage;
        _updateReferralCap();
    }

    function setReferralCapManual(uint256 _cap) external onlyOwner {
        require(_cap > 0 && _cap >= totalReferralRewardsGiven, "Presale: Invalid cap");
        maxReferralRewardsCap = _cap;
    }

    function _updateReferralCap() internal {
        uint256 totalSupply = presaleToken.totalSupply();
        uint256 newCap = (totalSupply * referralCapPercentage) / PERCENTAGE_BASE;
        require(newCap >= totalReferralRewardsGiven, "Presale: Cap below distributed");
        maxReferralRewardsCap = newCap;
    }

    function setMaxRoundDuration(uint256 _newDuration) external onlyOwner {
        require(_newDuration > 0 && _newDuration <= 180 days, "Presale: Invalid duration");
        require(activeRoundId == 0, "Presale: Cannot change during active round");
        maxRoundDuration = _newDuration;
    }

    function pause() external onlyOwner { _pause(); }
    function unpause() external onlyOwner { _unpause(); }

    function withdrawTokens(address _to, uint256 _amount) external onlyOwnerOrTimelock nonReentrant {
        require(_to != address(0), "Presale: Invalid address");
        uint256 bal = presaleToken.balanceOf(address(this));
        require(bal >= _amount, "Presale: Insufficient balance");
        presaleToken.safeTransfer(_to, _amount);
        emit Withdraw(_to, _amount);
    }

    /// @notice USDC rescue works because USDC never stays in contract
    /// @dev USDC is sent directly to liqHolder, so no conflict with totalUSDCDeposited
    function rescueERC20(address token, address to, uint256 amount) external onlyOwnerOrTimelock nonReentrant {
        require(to != address(0), "Presale: Invalid address");
        require(token != address(presaleToken), "Presale: Cannot rescue presale token");
        
        IERC20 t = IERC20(token);
        uint256 bal = t.balanceOf(address(this));
        require(amount <= bal, "Presale: Insufficient balance");
        
        SafeERC20.safeTransfer(t, to, amount);
        emit TokensRescued(token, to, amount);
    }

    /// @notice Can only set referrer once, before first purchase
    /// @dev Prevents deferred referrer selection and secondary referral markets
    function setReferrer(address _referrer) external {
        require(_referrer != address(0), "Presale: Invalid referrer");
        require(!referrerLocked[msg.sender], "Presale: Referrer already locked");
        require(usersInfo[msg.sender].totalPurchased == 0, "Presale: Cannot set after purchase");
        
        _assignReferrer(msg.sender, _referrer);
    }

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

    function getActiveRound() public view returns (Round memory) {
        require(activeRoundId != 0, "Presale: No active round");
        return rounds[activeRoundId];
    }

    function getRoundInfo(uint256 _roundId) external view returns (Round memory) {
        require(rounds[_roundId].roundId != 0, "Presale: Round not found");
        return rounds[_roundId];
    }

    function isReferralCapReached() public view returns (bool) {
        return totalReferralRewardsGiven >= maxReferralRewardsCap;
    }

    function getRemainingReferralRewards() public view returns (uint256) {
        return totalReferralRewardsGiven >= maxReferralRewardsCap 
            ? 0 
            : maxReferralRewardsCap - totalReferralRewardsGiven;
    }

    function getReferralCount(address _referrer) external view returns (uint256) {
        return referralInfoList[_referrer].length;
    }

    /// @notice Single source of truth for referral info
    function getReferralInfo(address _referrer, address _referee) external view returns (
        address referee, 
        uint256 referredDate, 
        bool isActive, 
        uint256 firstPurchaseDate
    ) {
        uint256 index = referralInfoIndex[_referrer][_referee];
        require(index > 0, "Presale: Referral not found");
        
        ReferralInfo memory info = referralInfoList[_referrer][index - 1];
        require(info.referee == _referee, "Presale: Invalid mapping");
        
        return (info.referee, info.referredDate, info.isActive, info.firstPurchaseDate);
    }

    function getReferralStatusCounts(address _referrer) external view returns (
        uint256 totalReferrals, 
        uint256 activeReferrals, 
        uint256 inactiveReferrals
    ) {
        ReferralInfo[] memory infos = referralInfoList[_referrer];
        totalReferrals = infos.length;
        
        for (uint256 i = 0; i < infos.length; i++) {
            if (infos[i].isActive) {
                activeReferrals++;
            } else {
                inactiveReferrals++;
            }
        }
        
        return (totalReferrals, activeReferrals, inactiveReferrals);
    }

    function getAllActiveReferrers() external view onlyOwner returns (
        address[] memory referrers, 
        uint256[] memory totalRewards, 
        uint256[] memory referralCounts
    ) {
        uint256 count = referrersList.length;
        referrers = new address[](count);
        totalRewards = new uint256[](count);
        referralCounts = new uint256[](count);

        for (uint256 i = 0; i < count; i++) {
            address referrer = referrersList[i];
            referrers[i] = referrer;
            totalRewards[i] = usersInfo[referrer].totalReferralRewards;
            referralCounts[i] = referralInfoList[referrer].length;
        }
        
        return (referrers, totalRewards, referralCounts);
    }

    function getTotalReferrersCount() external view returns (uint256) {
        return referrersList.length;
    }

    /// @notice Check if a user's referrer is locked (cannot be changed)
    function isReferrerLocked(address _user) external view returns (bool) {
        return referrerLocked[_user];
    }

    /// @notice Get the current active round allocation (unsold tokens)
    function getActiveRoundAllocation() external view returns (uint256) {
        return activeRoundUnsoldAllocation;
    }

    /// @notice Check if a referral has been admin-deactivated
    function isAdminDeactivated(address _referrer, address _referee) external view returns (bool) {
        return adminDeactivated[_referrer][_referee];
    }

    /// @notice Get the minimum activation delay constant
    function getMinimumActivationDelay() external pure returns (uint256) {
        return MINIMUM_ACTIVATION_DELAY;
    }
}

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)

pragma solidity >=0.6.2;

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

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

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

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

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

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

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

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

File 4 of 13 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)

pragma solidity >=0.4.16;

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

File 5 of 13 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)

pragma solidity >=0.4.16;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity >=0.6.2;

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[ERC-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC-20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     *
     * CAUTION: See Security Considerations above.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.20;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)

pragma solidity >=0.4.16;

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

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

pragma solidity ^0.8.20;

import {Context} from "../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 {
    bool private _paused;

    /**
     * @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);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

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

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

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

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @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
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

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

    uint256 private _status;

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

    constructor() {
        _status = NOT_ENTERED;
    }

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

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

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

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

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

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

Contract Security Audit

Contract ABI

API
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{"internalType":"uint256","name":"tokensSold","type":"uint256"},{"internalType":"uint256","name":"cap","type":"uint256"},{"internalType":"enum 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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000047ced79fd38e1c77739891aab40e5f66e6deb157000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48000000000000000000000000102897eeac4e88fea1e852ba5d7370415a5235b7

-----Decoded View---------------
Arg [0] : _liqHolder (address): 0x47cED79fD38E1C77739891Aab40E5F66E6deb157
Arg [1] : _usdcToken (address): 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Arg [2] : _token (address): 0x102897Eeac4e88FEa1e852ba5D7370415A5235B7

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000047ced79fd38e1c77739891aab40e5f66e6deb157
Arg [1] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [2] : 000000000000000000000000102897eeac4e88fea1e852ba5d7370415a5235b7


Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.