Contract Address Details

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

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {TOKEN_V3} from "./Tokens.sol";
import "./interfaces/ISWAP_V3.sol";
import "./libraries/TimeUtilsLib.sol";

interface IPulseXFactory {
    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IPulseXRouter02 {
    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);
}

interface IDAV {
    function transferGovernanceImmediate(address newGovernance) external;
}

interface IBuyAndBurnController {
    function transferGovernanceByAdmin(address newGovernance) external;
}

/**
 * @title AuctionAdmin
 * @author State Protocol Team
 * @notice Administrative contract managing auction operations, token deployment, and fee distribution
 * @dev Handles governance transfers, development fee wallet management, and token deployment
 * @custom:governance 7-day timelock for governance transfers across all protocol contracts
 * @custom:fees Distributes DAV minting fees (5% PLS) and auction fees (0.5%) to dev wallets
 * @custom:wallets Maximum 5 development fee wallets, percentages must sum to 100
 * @custom:centralization Single governance address controls protocol - intended for launchpad model with timelock protection
 */
contract AuctionAdmin is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    ISWAP_V3 public mainContract;
    address public governance;
    
    // ================= Governance Transfer System =================
    
    /// @notice Pending governance proposal with timelock
    struct GovernanceProposal {
        address newGovernance;
        uint256 timestamp;
    }
    GovernanceProposal public pendingProtocolGovernance;
    
    /// @notice Timelock duration for governance transfers (7 days for production)
    uint256 public constant GOVERNANCE_TIMELOCK = 7 days;
    
    // ================= Development Fee Wallet System =================
    // Used by DAV token (5% PLS minting fee) and AuctionSwap (0.5% auction fees)
    
    /// @notice Information for a development fee recipient wallet
    /// @dev Percentage must sum to 100 across all active wallets
    struct DevFeeWalletInfo {
        address wallet;         // Recipient address
        uint256 percentage;     // Allocation out of 100 (e.g., 40 = 40%)
        bool active;            // Whether this wallet is currently active
    }
    
    /// @notice Mapping of development fee wallet configurations by index
    /// @dev Uses index-based mapping for efficient iteration and compaction
    mapping(uint256 => DevFeeWalletInfo) public developmentFeeWallets;
    
    /// @notice Reverse mapping for quick wallet address to index lookup
    /// @dev Updated during add/remove operations to maintain consistency
    mapping(address => uint256) public feeWalletToIndex;
    
    /// @notice Current number of registered development fee wallets
    /// @dev Maximum of 5 wallets allowed (MAX_DEV_FEE_WALLETS)
    uint256 public developmentFeeWalletsCount;
    
    /// @notice Maximum number of development fee wallets allowed
    /// @dev Set to 5 to prevent excessive gas costs in distribution loops
    uint256 public constant MAX_DEV_FEE_WALLETS = 5;
    
    event ContractPaused(address indexed pauser);
    event ContractUnpaused(address indexed unpauser);
    event MaxParticipantsUpdated(uint256 oldValue, uint256 newValue);
    event DexAddressesUpdated(address indexed router, address indexed factory);
    event TokenDeployed(string name, address indexed token, uint256 tokenId);
    event AuctionStarted(uint256 startTime, uint256 endTime, address indexed token, address indexed stateToken);
    event DavTokenAddressSet(address indexed davToken);
    event TokensDeposited(address indexed token, uint256 amount);
    event ProtocolFeeAccrued(address indexed token, uint256 amount);
    event BurnAccrued(address indexed token, uint256 amount);
    event PoolCreated(address indexed token, address indexed pair, uint256 tokenAmount, uint256 stateAmount);
    event DailyStateReleaseRolled(uint256 dayIndex, uint256 amountReleased, uint256 nextWindowStart);
    event DevelopmentFeeWalletAdded(address indexed wallet, uint256 percentage);
    event DevelopmentFeeWalletRemoved(address indexed wallet);
    event DevelopmentFeeWalletPercentageUpdated(address indexed wallet, uint256 oldPercentage, uint256 newPercentage);
    event ProtocolGovernanceProposed(address indexed newGovernance, uint256 executeAfter);
    event ProtocolGovernanceTransferred(address indexed newGovernance);
    event ProtocolGovernanceProposalCancelled(address indexed cancelledGovernance);

    modifier onlyMainContract() {
        require(msg.sender == address(mainContract), "Only main contract");
        _;
    }
    
    modifier onlyGovernance() {
        require(msg.sender == governance, "Only governance");
        _;
    }

    constructor(address _mainContract, address _governance) Ownable(msg.sender) {
        require(_mainContract != address(0) && _governance != address(0), "Zero address");
        mainContract = ISWAP_V3(_mainContract);
        governance = _governance;
        
        // Renounce ownership immediately - governance has direct admin rights
        renounceOwnership();
    }

    // ================= Centralized Governance Transfer (7-Day Timelock) =================
    
    /**
     * @notice Propose new governance for entire protocol (7-day timelock)
     * @param newGovernance Address of new governance (typically a multisig)
     * @dev Starts timelock - must call confirmProtocolGovernance() after 7 days
     * @dev Transfers governance for all protocol contracts:
     *      - AuctionSwap: governance
     *      - DavToken: governance
     *      - BuyAndBurnController: governance
     *      - AuctionAdmin: governance (self)
     *      
     *      NOTE: All contracts renounce ownership in constructor
     *            AirdropDistributor is fully autonomous (no governance)
     */
    function proposeProtocolGovernance(address newGovernance) external onlyGovernance {
        require(newGovernance != address(0), "Zero address");
        
        pendingProtocolGovernance = GovernanceProposal({
            newGovernance: newGovernance,
            timestamp: block.timestamp + GOVERNANCE_TIMELOCK
        });
        
        emit ProtocolGovernanceProposed(newGovernance, block.timestamp + GOVERNANCE_TIMELOCK);
    }

    /**
     * @notice Confirm governance transfer after timelock expires
     * @dev Transfers governance for ALL protocol contracts atomically:
     *      1. AuctionSwap (SWAP_V3) - transfers governance
     *      2. DavToken (DAV_V3) - transfers governance
     *      3. BuyAndBurnController_V2 - transfers governance (read from SWAP)
     *      4. AuctionAdmin - transfers own governance (last)
     * @custom:security All transfers atomic - if any fails, entire transaction reverts
     * @custom:excluded SwapLens (renounced ownership), AirdropDistributor (autonomous)
     */
    function confirmProtocolGovernance() external onlyGovernance {
        require(pendingProtocolGovernance.newGovernance != address(0), "No pending governance");
        require(block.timestamp >= pendingProtocolGovernance.timestamp, "Timelock not expired");
        
        address newGov = pendingProtocolGovernance.newGovernance;
        
        // 1. Transfer AuctionSwap governance (ownership renounced in constructor)
        mainContract._setGovernance(newGov);
        
        // 2. Transfer DavToken governance (ownership renounced in constructor)
        address davToken = mainContract.davToken();
        if (davToken != address(0)) {
            IDAV(davToken).transferGovernanceImmediate(newGov);
        }
        
        // 3. Transfer BuyAndBurnController governance (ownership renounced in constructor)
        address buyAndBurn = mainContract.buyAndBurnController();
        if (buyAndBurn != address(0)) {
            IBuyAndBurnController(buyAndBurn).transferGovernanceByAdmin(newGov);
        }
        
        // 4. SwapLens - ownership renounced, no transfer needed
        // 5. AirdropDistributor - fully autonomous, no governance
        
        // 6. Transfer own governance (last operation)
        governance = newGov;
        
        // Clear pending proposal
        delete pendingProtocolGovernance;
        
        emit ProtocolGovernanceTransferred(newGov);
    }
    
    /**
     * @notice Cancel pending governance proposal (emergency)
     * @dev Only callable by current governance before timelock expires
     */
    function cancelProtocolGovernanceProposal() external onlyGovernance {
        require(pendingProtocolGovernance.newGovernance != address(0), "No pending governance");
        address cancelledGovernance = pendingProtocolGovernance.newGovernance;
        delete pendingProtocolGovernance;
        emit ProtocolGovernanceProposalCancelled(cancelledGovernance);
    }
    
    /**
     * @notice View pending governance proposal details
     * @return newGovernance Proposed new governance address
     * @return executeAfter Timestamp when proposal can be executed
     * @return isReady Whether timelock has passed and proposal is ready
     */
    function getPendingGovernance() external view returns (
        address newGovernance,
        uint256 executeAfter,
        bool isReady
    ) {
        newGovernance = pendingProtocolGovernance.newGovernance;
        executeAfter = pendingProtocolGovernance.timestamp;
        isReady = newGovernance != address(0) && block.timestamp >= executeAfter;
    }
    
    /**
     * @notice One-click token deployment with automatic SWAP registration
     * @param swapContract The SWAP_V3 contract address initiating the call (must match mainContract)
     * @param name Token name for the new token
     * @param symbol Token symbol for the new token
     * @return tokenAddress Address of the newly deployed token (100% supply minted to SWAP vault)
     * @custom:security Only callable by mainContract, all tokens minted to SWAP treasury atomically
     */
    function deployTokenOneClick(
        address swapContract,
        string memory name,
        string memory symbol
    ) external returns (address tokenAddress) {
        // Ensure this is being called by the main contract and the provided address matches
        require(msg.sender == address(mainContract), "Only main contract");
        require(swapContract == address(mainContract), "Invalid swap contract");
        require(bytes(name).length > 0 && bytes(symbol).length > 0, "Empty name or symbol");

        // Get governance address from the main contract
        address swapGovernance = mainContract.governanceAddress();

        // Deploy the token - 100% to SWAP treasury in SINGLE transaction
        // NOTE: _owner = address(0) makes token ownerless from deployment (modified OZ Ownable allows this)
        //       This is intentional and more efficient than deploying with owner then calling renounceOwnership()
        TOKEN_V3 token = new TOKEN_V3(
            name,
            symbol,
            address(mainContract),   // recipient (100% to SWAP contract in single mint)
            address(0)               // _owner (ownerless deployment - custom OZ modification)
        );

        tokenAddress = address(token);

        // Register the token with the main contract (deployer shown as governance for UI ownership mapping)
        mainContract._registerDeployedToken(tokenAddress, name, swapGovernance);

        emit TokenDeployed(name, tokenAddress, 0);
        return tokenAddress;
    }

    // ================= Development Fee Wallet Management =================
    
    /**
     * @notice Add a new development fee wallet with automatic equal distribution
     * @param wallet Address of the development wallet to add
     * @dev Automatically rebalances all wallets to equal percentages (e.g., 3 wallets = 33/33/34)
     * @custom:limit Maximum 5 wallets enforced to prevent excessive gas costs
     * @custom:security Validates wallet not already registered and count below MAX_DEV_FEE_WALLETS
     */
    function addDevelopmentFeeWallet(address wallet) external onlyGovernance {
        require(wallet != address(0), "Zero address");
        require(developmentFeeWalletsCount < MAX_DEV_FEE_WALLETS, "Max wallets reached");
        require(feeWalletToIndex[wallet] == 0 || !developmentFeeWallets[feeWalletToIndex[wallet]].active, "Wallet already exists");
        
        // Add new wallet with 0% initially
        uint256 index = developmentFeeWalletsCount;
        developmentFeeWallets[index] = DevFeeWalletInfo({
            wallet: wallet,
            percentage: 0,
            active: true
        });
        
        feeWalletToIndex[wallet] = index;
        developmentFeeWalletsCount++;
        
        // Automatically rebalance percentages equally among all active wallets
        _rebalanceAllWallets();
        
        emit DevelopmentFeeWalletAdded(wallet, developmentFeeWallets[index].percentage);
    }
    
    /**
     * @notice Remove a development fee wallet
     * @param wallet Address of the wallet to remove
     * @dev Uses swap-and-pop pattern for array compaction with proper mapping updates
     * @custom:pattern Moves last wallet to removed position, updates mappings, decrements count
     * @custom:security Validates wallet exists and is active before removal
     */
    function removeDevelopmentFeeWallet(address wallet) external onlyGovernance {
        require(wallet != address(0), "Zero address");
        
        uint256 index = feeWalletToIndex[wallet];
        require(developmentFeeWallets[index].active, "Wallet not active");
        require(developmentFeeWallets[index].wallet == wallet, "Wallet mismatch");
        
        // Mark as inactive
        developmentFeeWallets[index].active = false;
        
        // Compact the array by moving last element to removed position
        uint256 lastIndex = developmentFeeWalletsCount - 1;
        if (index != lastIndex && developmentFeeWallets[lastIndex].active) {
            // Move last wallet to removed position
            developmentFeeWallets[index] = developmentFeeWallets[lastIndex];
            feeWalletToIndex[developmentFeeWallets[lastIndex].wallet] = index;
        }
        
        // Clear last position
        delete developmentFeeWallets[lastIndex];
        delete feeWalletToIndex[wallet];
        developmentFeeWalletsCount--;
        
        // Automatically rebalance percentages equally among remaining active wallets
        _rebalanceAllWallets();
        
        emit DevelopmentFeeWalletRemoved(wallet);
    }
    
    /**
     * @notice Update percentage for an existing development fee wallet
     * @param wallet Address of the wallet
     * @param newPercentage New percentage allocation (out of 100)
     * @dev Total percentage across all wallets must equal 100% (except when setting to 0% for removal)
     */
    function updateDevelopmentFeeWalletPercentage(address wallet, uint256 newPercentage) external onlyGovernance {
        require(wallet != address(0), "Zero address");
        require(newPercentage <= 100, "Invalid percentage");
        
        uint256 index = feeWalletToIndex[wallet];
        require(developmentFeeWallets[index].active, "Wallet not active");
        require(developmentFeeWallets[index].wallet == wallet, "Wallet mismatch");
        
        uint256 oldPercentage = developmentFeeWallets[index].percentage;
        
        // Calculate total without this wallet
        uint256 otherWalletsTotal = _getTotalDevFeePercentage() - oldPercentage;
        
        // Allow setting to 0% as part of wallet removal workflow
        if (newPercentage == 0) {
            developmentFeeWallets[index].percentage = 0;
            emit DevelopmentFeeWalletPercentageUpdated(wallet, oldPercentage, 0);
            return;
        }
        
        // Otherwise, ensure total equals 100%
        require(otherWalletsTotal + newPercentage == 100, "Total must equal 100%");
        
        developmentFeeWallets[index].percentage = newPercentage;
        emit DevelopmentFeeWalletPercentageUpdated(wallet, oldPercentage, newPercentage);
    }
    
    /**
     * @notice Get all development fee wallets information
     * @return wallets Array of wallet addresses
     * @return percentages Array of percentage allocations
     * @return activeStatuses Array of active status flags
     */
    function getDevelopmentFeeWalletsInfo() external view returns (
        address[] memory wallets,
        uint256[] memory percentages,
        bool[] memory activeStatuses
    ) {
        wallets = new address[](developmentFeeWalletsCount);
        percentages = new uint256[](developmentFeeWalletsCount);
        activeStatuses = new bool[](developmentFeeWalletsCount);
        
        for (uint256 i = 0; i < developmentFeeWalletsCount; i++) {
            wallets[i] = developmentFeeWallets[i].wallet;
            percentages[i] = developmentFeeWallets[i].percentage;
            activeStatuses[i] = developmentFeeWallets[i].active;
        }
    }
    
    /**
     * @notice Get percentage allocation for a specific wallet
     * @param wallet Address of the wallet
     * @return percentage Percentage allocation (0-100)
     */
    function getWalletPercentage(address wallet) external view returns (uint256) {
        if (wallet == address(0)) return 0;
        
        uint256 index = feeWalletToIndex[wallet];
        if (!developmentFeeWallets[index].active) return 0;
        if (developmentFeeWallets[index].wallet != wallet) return 0;
        
        return developmentFeeWallets[index].percentage;
    }
    
    /**
     * @notice Get total percentage allocated across all active wallets
     * @return total The sum of all active wallet percentages
     */
    function _getTotalDevFeePercentage() internal view returns (uint256 total) {
        for (uint256 i = 0; i < developmentFeeWalletsCount; i++) {
            if (developmentFeeWallets[i].active) {
                total += developmentFeeWallets[i].percentage;
            }
        }
    }
    
    /**
     * @notice Automatically rebalance all active wallets to equal percentages
     * @dev Distributes 100% equally among all active wallets
     * @custom:formula basePercentage = 100 / count, remainder goes to first wallet
     * @custom:example 1 wallet = 100%, 2 wallets = 50/50, 3 wallets = 33/33/34
     * @custom:remainder First wallet (index 0) receives remainder to ensure total equals 100%
     *                   This is intentional - provides deterministic distribution with minimal complexity
     */
    function _rebalanceAllWallets() internal {
        if (developmentFeeWalletsCount == 0) return;
        
        // Calculate equal distribution
        uint256 basePercentage = 100 / developmentFeeWalletsCount;
        uint256 remainder = 100 % developmentFeeWalletsCount;
        
        // Distribute equally with remainder going to first wallet
        for (uint256 i = 0; i < developmentFeeWalletsCount; i++) {
            if (developmentFeeWallets[i].active) {
                if (i == 0) {
                    // First wallet gets base + remainder to ensure 100% total
                    developmentFeeWallets[i].percentage = basePercentage + remainder;
                } else {
                    developmentFeeWallets[i].percentage = basePercentage;
                }
            }
        }
    }
    
    /**
     * @notice Distribute fees to development wallets based on configured percentages
     * @param token Address of the token to distribute (STATE, auction tokens, PLS, etc.)
     * @param amount Total amount of tokens to distribute among dev wallets
     * @dev Called automatically by AuctionSwap (0.5% fees) and DAV (5% mint fees)
     * @custom:caller Callable by mainContract or governance for manual distributions
     * @custom:distribution Shares based on wallet percentages, dust goes to first active wallet
     * @custom:security Uses SafeERC20, reverts if insufficient balance
     * @custom:integration DAV distributes PLS fees directly, this handles ERC20 token fees
     */
    function distributeFeeToWallets(address token, uint256 amount) external {
        require(msg.sender == address(mainContract) || msg.sender == governance, "Unauthorized");
        require(token != address(0), "Zero token address");
        require(amount > 0, "Zero amount");
        
        // If no wallets configured, do nothing (tokens stay in AuctionAdmin)
        if (developmentFeeWalletsCount == 0) return;
        
        uint256 totalDistributed = 0;
        
        // Distribute tokens based on percentages
        for (uint256 i = 0; i < developmentFeeWalletsCount; i++) {
            if (developmentFeeWallets[i].active && developmentFeeWallets[i].percentage > 0) {
                uint256 share = (amount * developmentFeeWallets[i].percentage) / 100;
                if (share > 0) {
                    IERC20(token).safeTransfer(developmentFeeWallets[i].wallet, share);
                    totalDistributed += share;
                }
            }
        }
        
        // Handle dust (remainder due to rounding)
        uint256 dust = amount - totalDistributed;
        if (dust > 0 && developmentFeeWalletsCount > 0) {
            // Give dust to first active wallet with non-zero percentage
            for (uint256 i = 0; i < developmentFeeWalletsCount; i++) {
                if (developmentFeeWallets[i].active && developmentFeeWallets[i].percentage > 0) {
                    IERC20(token).safeTransfer(developmentFeeWallets[i].wallet, dust);
                    break;
                }
            }
        }
    }
}
        

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

pragma solidity ^0.8.20;

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

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

/**
 * @title TimeUtilsLib
 * @author State Protocol Team
 * @notice Utility library for timezone-aware time calculations
 * @dev Provides functions to calculate time boundaries with timezone offsets
 * @custom:timezone Default: GMT+3 (17:00 local = 14:00 UTC for DAV mint timing)
 * @custom:validation Bounds checking for timezone offsets (-14 to +14 hours)
 */
library TimeUtilsLib {
    uint256 internal constant SECONDS_IN_DAY = 86400;
    // Default time boundary: 17:00 GMT+3 (5:00 PM GMT+3)
    uint256 internal constant TARGET_GMT_HOUR = 17;
    uint256 internal constant TARGET_GMT_MINUTE = 0;

    /**
     * @notice Validates time calculation parameters
     * @custom:bounds Timezone offset: -14 to +14 hours, Hour: 0-23, Minute: 0-59
     * @custom:safety Prevents overflow in signed integer operations
     */
    function _validateTimeParams(
        uint256 blockTimestamp,
        int256 tzOffsetHours,
        uint256 targetLocalHour,
        uint256 targetLocalMinute
    ) private pure {
        require(blockTimestamp > 0, "Invalid timestamp");
        require(tzOffsetHours >= -14 && tzOffsetHours <= 14, "Invalid offset");
        require(targetLocalHour < 24, "Invalid hour");
        require(targetLocalMinute < 60, "Invalid minute");
        require(blockTimestamp <= uint256(type(int256).max), "Timestamp too large");
    }

    /**
     * @notice Calculates the next claim start time using a timezone offset and local-hour target
     * @param blockTimestamp Current block timestamp (UTC seconds)
     * @param tzOffsetHours Signed hour offset from UTC (e.g. +3 for GMT+3, -4 for GMT-4)
     * @param targetLocalHour Target hour in the local timezone (0-23)
     * @param targetLocalMinute Target minute in the local timezone (0-59)
     * @return finalTimestamp UTC timestamp of the next target local-time boundary
     * @custom:timezone Fixed offsets (does not account for DST)
     * @custom:safety Overflow protection on all signed math operations
     */
    function calculateNextClaimStartTZ(
        uint256 blockTimestamp,
        int256 tzOffsetHours,
        uint256 targetLocalHour,
        uint256 targetLocalMinute
    ) internal pure returns (uint256 finalTimestamp) {
        _validateTimeParams(blockTimestamp, tzOffsetHours, targetLocalHour, targetLocalMinute);
        
        int256 offsetSeconds = tzOffsetHours * int256(1 hours);
        int256 tsInt = int256(blockTimestamp);
        
        if (offsetSeconds > 0) {
            require(tsInt <= type(int256).max - offsetSeconds, "Local overflow");
        } else if (offsetSeconds < 0) {
            require(tsInt >= type(int256).min - offsetSeconds, "Local underflow");
        }
        
        int256 localTs = tsInt + offsetSeconds;
        require(localTs >= 0, "Local time < 0");
        
        uint256 localTsUint = uint256(localTs);
        uint256 localDayStart = (localTsUint / SECONDS_IN_DAY) * SECONDS_IN_DAY;
        
        uint256 hoursSec = targetLocalHour * 1 hours;
        uint256 minutesSec = targetLocalMinute * 1 minutes;
        require(localDayStart <= type(uint256).max - hoursSec, "Target calc ovf (h)");
        uint256 targetLocal = localDayStart + hoursSec;
        require(targetLocal <= type(uint256).max - minutesSec, "Target calc ovf (m)");
        targetLocal += minutesSec;
        
        if (localTsUint >= targetLocal) {
            require(targetLocal <= type(uint256).max - SECONDS_IN_DAY, "Next day ovf");
            targetLocal += SECONDS_IN_DAY;
        }
        
        require(targetLocal <= uint256(type(int256).max), "UTC cast ovf");
        int256 utcTs = int256(targetLocal) - offsetSeconds;
        require(utcTs >= 0, "UTC time < 0");
        finalTimestamp = uint256(utcTs);
        require(finalTimestamp > blockTimestamp, "Non-future ts");
    }

    /**
     * @notice Calculate next 17:00 GMT+3 (5:00 PM GMT+3)
     * @custom:utc 17:00 GMT+3 = 14:00 UTC (2:00 PM UTC)
     */
    function calculateNextClaimStartGMTPlus3(uint256 blockTimestamp)
        internal
        pure
        returns (uint256)
    {
        return calculateNextClaimStartTZ(blockTimestamp, int256(3), 17, 0);
    }

    /**
     * @notice LEGACY: Calculate next 23:00 Pakistan Standard Time (11:00 PM UTC+5)
     * @dev Not used in current protocol. Use calculateNextClaimStartGMTPlus3() instead
     * @custom:utc 23:00 UTC+5 = 18:00 UTC (6:00 PM UTC)
     */
    function calculateNextClaimStartPakistan(uint256 blockTimestamp) internal pure returns (uint256) {
        return calculateNextClaimStartTZ(blockTimestamp, int256(5), 23, 0);
    }
}
          

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

interface ISWAP_V3 {
    // Governance state variables
    function governanceAddress() external view returns (address);
    function paused() external view returns (bool);
    function maxAuctionParticipants() external view returns (uint256);
    function treasury() external view returns (address);
    function davToken() external view returns (address);
    function stateToken() external view returns (address);
    function airdropDistributor() external view returns (address);
    function buyAndBurnController() external view returns (address);
    function swapLens() external view returns (address);
    function pulseXRouter() external view returns (address);
    function pulseXFactory() external view returns (address);
    
    // Admin-only state setters
    function _setPaused(bool _paused) external;
    function _setMaxAuctionParticipants(uint256 newMax) external;
    function _setDexAddresses(address _router, address _factory) external;
    function _setGovernance(address newGov) external;
    function _registerDeployedToken(address tokenAddress, string memory name, address deployer) external;
    function transferOwnershipByAdmin(address newOwner) external;
    
    // Vault allowance management
    function setVaultAllowance(address token, address spender, uint256 amount) external;
}
          

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

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

/**
 * @title TOKEN_V3 - Auction Token Contract
 * @author State Protocol Team
 * @notice Generic ERC20 token with fixed 5 billion supply minted at deployment
 * @dev Used for auction tokens in State Protocol ecosystem
 *
 * @custom:supply 5 billion tokens (5,000,000,000 with 18 decimals)
 * @custom:allocation Entire supply minted to recipient (typically SWAP_V3) in constructor
 * @custom:ownership Deployed ownerless - constructor accepts address(0) for _owner parameter
 * @custom:ownable-modification Uses modified OpenZeppelin Ownable.sol with constructor validation removed
 *                               to allow address(0) as initial owner (ownerless from deployment)
 */
contract TOKEN_V3 is ERC20, Ownable {
    
    // ============ Constants ============
    
    /// @notice Total supply of auction tokens
    /// @dev 5 billion tokens: 5,000,000,000 × 10^18 wei
    ///      Compile-time constant - does not consume storage slot
    uint256 public constant MAX_SUPPLY = 5000000000 ether;
    
    // ============ Events ============
    
    /// @notice Emitted when initial supply is minted during deployment
    /// @param recipient Address receiving the entire token supply
    /// @param totalAmount Total tokens minted (5 billion with 18 decimals)
    event InitialDistribution(
        address indexed recipient,
        uint256 totalAmount
    );

    // ============ Constructor ============
    
    /// @notice Deploys auction token with entire supply minted to recipient
    /// @param name Human-readable token name (e.g., "MyToken")
    /// @param symbol Token ticker symbol (e.g., "MTK")
    /// @param recipient Address receiving 100% of supply (typically SWAP_V3 auction contract)
    /// @param _owner Owner address - pass address(0) for ownerless deployment (standard practice)
    /// @dev Constructor operations (atomic transaction):
    ///      1. Validate recipient address (non-zero)
    ///      2. Mint 5 billion tokens to recipient
    ///      3. Set owner (address(0) for ownerless tokens - modified OZ Ownable accepts this)
    ///      4. Emit InitialDistribution event
    /// @custom:ownerless-design Tokens deployed with _owner = address(0) have no owner from birth
    ///                          Modified Ownable.sol constructor allows this (standard OZ v5 would revert)
    ///                          This is intentional - saves gas vs deploying with owner then renouncing
    constructor(
        string memory name,
        string memory symbol,
        address recipient,
        address _owner
    ) ERC20(name, symbol) Ownable(_owner) {
        require(recipient != address(0), "Invalid recipient address");
        
        // Mint entire supply to auction contract
        _mint(recipient, MAX_SUPPLY);
        
        emit InitialDistribution(recipient, MAX_SUPPLY);
    }
}
          

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

pragma solidity ^0.8.20;

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

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

    uint256 private _status;

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

    constructor() {
        _status = NOT_ENTERED;
    }

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

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

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

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

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

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

pragma solidity ^0.8.20;

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.3.0) (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 v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.20;

import {IERC20} from "./IERC20.sol";
import {IERC20Metadata} from "./extensions/IERC20Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {IERC20Errors} from "../../interfaces/draft-IERC6093.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}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * 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 ERC-20
 * applications.
 */
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * Both 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 returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual 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 default value returned by this function, unless
     * it's 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 returns (uint8) {
        return 18;
    }

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

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

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

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

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Skips emitting an {Approval} event indicating an allowance update. This is not
     * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `value`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `value`.
     */
    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to`.
     *
     * 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.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    /**
     * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`
     * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding
     * this function.
     *
     * Emits a {Transfer} event.
     */
    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            // Overflow check required: The rest of the code assumes that totalSupply never overflows
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                // Overflow not possible: value <= fromBalance <= totalSupply.
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.
                _totalSupply -= value;
            }
        } else {
            unchecked {
                // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    /**
     * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).
     * Relies on the `_update` mechanism
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead.
     */
    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    /**
     * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.
     * Relies on the `_update` mechanism.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * NOTE: This function is not virtual, {_update} should be overridden instead
     */
    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    /**
     * @dev Sets `value` 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.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    /**
     * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.
     *
     * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by
     * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any
     * `Approval` event during `transferFrom` operations.
     *
     * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to
     * true using the following override:
     *
     * ```solidity
     * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {
     *     super._approve(owner, spender, value, true);
     * }
     * ```
     *
     * Requirements are the same as {_approve}.
     */
    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    /**
     * @dev Updates `owner`'s allowance for `spender` based on spent `value`.
     *
     * Does not update the allowance value in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Does not emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance < type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC-20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC-721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in ERC-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC-1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}
          

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

pragma solidity ^0.8.20;

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

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

pragma solidity ^0.8.20;

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

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (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) {
        
        _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);
    }
}