FixedRateMaturityVault

{{
  "language": "Solidity",
  "sources": {
    "src/FixedRateMaturityVault.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import {EIP712} from "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";

/**
 * @title FixedRateMaturityVault
 * @notice Fixed-rate maturity vault with queue-based withdrawal system
 *         - Users deposit underlying tokens and receive fTOKEN based on fixYield
 *         - Contract calculates fyAmount based on fixYield and time remaining
 *         - Withdrawals are queued and processed by authorized processors
 *         - 1 fTOKEN = 1 underlying token on/after maturityxa
 *         - EIP-712 signed quotes with fixYield parameter
 *         - Two-role access control: ISSUER and WITHDRAWAL_QUEUE_PROCESSOR
 */
contract FixedRateMaturityVault is ERC20, EIP712, ReentrancyGuard {
    using SafeERC20 for IERC20;

    // -------- Roles --------
    bytes32 public constant ISSUER_ROLE = keccak256("ISSUER_ROLE");
    bytes32 public constant WITHDRAWAL_QUEUE_PROCESSOR_ROLE = keccak256("WITHDRAWAL_QUEUE_PROCESSOR_ROLE");
    bytes32 public constant ASSET_MANAGER_ROLE = keccak256("ASSET_MANAGER_ROLE");
    
    mapping(bytes32 => mapping(address => bool)) public roles;

    // -------- Immutable config --------
    uint256 public immutable maturityTimestamp;
    IERC20 public immutable underlyingToken;
    uint8 private immutable _underlyingDecimals;

    // -------- Parameters (issuer-tunable) --------
    address public quoteSigner;      // backend signer for quotes
    uint256 public faceCap;          // optional max total face (totalSupply) allowed; 0 means unbounded
    bool    public depositsPaused;   // emergency stop for new deposits

    // -------- Quote validation parameters --------
    uint256 public maxQuoteAge;      // maximum age of quote in seconds
    uint256 public minDepositAmount; // minimum deposit amount per transaction
    uint256 public maxDepositAmount; // maximum deposit amount per transaction
    uint256 public maxDepositPerDay; // maximum deposit per user per day

    // -------- Rho routing / liquidity policy --------
    address public rhoTarget;                 // allowlisted Rho endpoint (EOA or contract)
    uint256 public minLiquidityBufferBps = 1000; // keep >=10% idle as buffer

    // -------- Replay protection for quotes --------
    mapping(address => mapping(uint256 => bool)) public usedNonce;

    // -------- Daily deposit tracking --------
    mapping(address => uint256) public dailyDeposits;
    mapping(address => uint256) public lastDepositDay;

    // -------- Withdrawal Queue System --------
    struct WithdrawalRequest {
        address user;
        uint256 fyAmount;
        uint256 underlyingAmount;
        uint256 timestamp;
        bool processed;
    }
    
    mapping(uint256 => WithdrawalRequest) public withdrawalQueue;
    uint256 public queueFront;        // Next request to be processed
    uint256 public queueBack;         // Next available slot
    uint256 public pendingWithdrawals; // Total pending withdrawal amount
    
    // -------- User withdrawal tracking --------
    mapping(address => uint256) public userPendingWithdrawals;

    // -------- Constants --------
    uint256 public constant BPS_DENOMINATOR = 10_000;
    uint256 public constant SECONDS_PER_YEAR = 365 days;
    uint256 public constant DEPOSIT_BLOCK_PERIOD = 24 hours; // Block deposits 24 hours before maturity

    // -------- EIP-712 Quote (updated structure) --------
    bytes32 public constant QUOTE_TYPEHASH = keccak256(
        "Quote(address userAddress,uint256 depositAmount,uint256 fixYield,uint256 maturityTimestamp,uint256 quoteTimestamp,uint256 nonce)"
    );
    
    // TODO: Future enhancement - range quotes for execution flexibility
    // bytes32 public constant QUOTE_TYPEHASH = keccak256(
    //   "Quote(address userAddress,uint256 minAmount,uint256 maxAmount,uint256 fixYield,uint256 maturityTimestamp,uint256 quoteTimestamp,uint256 nonce)"
    // );
    // In deposit():
    // require(depositAmount >= minAmount && depositAmount <= maxAmount, "amount out of range");

    // -------- Events --------
    event Deposit(address indexed user, uint256 tokenIn, uint256 fyMinted, uint256 nonce, uint256 fixYieldBps, uint256 quoteTimestamp);
    event WithdrawalRequested(address indexed user, uint256 requestId, uint256 fyAmount, uint256 underlyingAmount);
    event WithdrawalProcessed(address indexed user, uint256 requestId, uint256 underlyingAmount, address processor);
    event DepositsPausedSet(bool paused);
    event QuoteSignerSet(address oldSigner, address newSigner);
    event FaceCapSet(uint256 oldCap, uint256 newCap);
    event RoleGranted(bytes32 indexed role, address indexed account);
    event RoleRevoked(bytes32 indexed role, address indexed account);
    event MaxQuoteAgeSet(uint256 oldAge, uint256 newAge);
    event MinDepositAmountSet(uint256 oldAmount, uint256 newAmount);
    event MaxDepositAmountSet(uint256 oldAmount, uint256 newAmount);
    event MaxDepositPerDaySet(uint256 oldAmount, uint256 newAmount);
    event RhoTargetSet(address indexed oldTarget, address indexed newTarget);
    event MinLiquidityBufferBpsSet(uint256 oldBps, uint256 newBps);
    event MovedToRho(uint256 amount);
    event PulledFromRho(uint256 amount);

    // -------- Modifiers --------
    modifier onlyRole(bytes32 role) {
        require(roles[role][msg.sender], "AccessControl: caller does not have required role");
        _;
    }

    // -------- Constructor --------
    constructor(
        address _underlyingToken,
        uint256 _maturityTimestamp,
        address _quoteSigner,
        string memory nameSuffix, // e.g., "2025-06-30"
        address _issuer
    )
        ERC20(
            string(abi.encodePacked(IERC20Metadata(_underlyingToken).symbol(), " Fixed ", nameSuffix)),
            string(abi.encodePacked("f", IERC20Metadata(_underlyingToken).symbol(), "-", nameSuffix))
        )
        EIP712("FixedRateMaturityVault", "1")
    {
        require(_underlyingToken != address(0), "bad underlying token");
        require(_maturityTimestamp > block.timestamp, "maturity in past");
        require(_quoteSigner != address(0), "bad signer");
        require(_issuer != address(0), "bad issuer");

        underlyingToken = IERC20(_underlyingToken);
        maturityTimestamp = _maturityTimestamp;
        quoteSigner = _quoteSigner;

        _underlyingDecimals = IERC20Metadata(_underlyingToken).decimals();

        faceCap = 0;
        depositsPaused = false;

        maxQuoteAge = 5 minutes;
        // Scale defaults to underlying units (yUSD=6)
        minDepositAmount = 100 * (10 ** _underlyingDecimals);
        maxDepositAmount = 1_000 * (10 ** _underlyingDecimals);
        maxDepositPerDay = 10_000 * (10 ** _underlyingDecimals);

        _grantRole(ISSUER_ROLE, _issuer);
    }

    // -------- Role Management --------
    function _grantRole(bytes32 role, address account) internal {
        roles[role][account] = true;
        emit RoleGranted(role, account);
    }

    function grantRole(bytes32 role, address account) external onlyRole(ISSUER_ROLE) {
        require(account != address(0), "bad account");
        _grantRole(role, account);
    }

    function revokeRole(bytes32 role, address account) external onlyRole(ISSUER_ROLE) {
        require(account != address(0), "bad account");
        roles[role][account] = false;
        emit RoleRevoked(role, account);
    }

    function hasRole(bytes32 role, address account) external view returns (bool) {
        return roles[role][account];
    }

    // -------- Views --------

    /// @notice Current underlying token this contract holds.
    function underlyingHeld() public view returns (uint256) {
        return underlyingToken.balanceOf(address(this));
    }

    /// @notice Total liability owed by the vault right now.
    /// @dev Includes outstanding fTOKEN supply + queued redemptions (burned from supply but tracked in pendingWithdrawals).
    function totalLiability() external view returns (uint256) {
        return totalSupply() + pendingWithdrawals;
    }

    /// @notice Available assets minus pending withdrawals.
    function freeAssets() public view returns (uint256) {
        uint256 totalAssets = underlyingHeld();
        uint256 pending = pendingWithdrawals;
        return totalAssets > pending ? totalAssets - pending : 0;
    }

    /// @notice Get queue statistics.
    function getQueueStats() external view returns (uint256 front, uint256 back, uint256 pending) {
        return (queueFront, queueBack, pendingWithdrawals);
    }

    /// @notice Get withdrawal request details.
    function getWithdrawalRequest(uint256 requestId) external view returns (
        address user,
        uint256 fyAmount,
        uint256 underlyingAmount,
        uint256 timestamp,
        bool processed
    ) {
        WithdrawalRequest memory request = withdrawalQueue[requestId];
        return (request.user, request.fyAmount, request.underlyingAmount, request.timestamp, request.processed);
    }

    /// @notice True if the given nonce has been consumed for `user`.
    function quoteUsed(address user, uint256 nonce) external view returns (bool) {
        return usedNonce[user][nonce];
    }

    /// @notice Calculate fyAmount based on fixYield and time remaining to maturity
    /// @dev This is the core function that calculates the exact amount to mint
    function calculateFyAmount(
        uint256 depositAmount,
        uint256 fixYieldBps,
        uint256 quoteTimestamp
    ) public view returns (uint256) {
        require(quoteTimestamp <= maturityTimestamp, "quote after maturity");

        uint256 timeRemaining = maturityTimestamp - quoteTimestamp;
        uint256 annualYieldBps = (fixYieldBps * timeRemaining) / SECONDS_PER_YEAR;

        uint256 yieldAmount = (depositAmount * annualYieldBps) / BPS_DENOMINATOR;
        return depositAmount + yieldAmount;
    }

    /// @notice Recoverable EIP-712 digest for a quote
    function hashQuote(
        address userAddress,
        uint256 depositAmount,
        uint256 fixYield,
        uint256 qMaturityTimestamp,
        uint256 quoteTimestamp,
        uint256 nonce
    ) external view returns (bytes32) {
        bytes32 structHash = keccak256(
            abi.encode(
                QUOTE_TYPEHASH,
                userAddress,
                depositAmount,
                fixYield,
                qMaturityTimestamp,
                quoteTimestamp,
                nonce
            )
        );
        return _hashTypedDataV4(structHash);
    }

    /// @notice Check if user can deposit the given amount today.
    function canDepositToday(address user, uint256 amount) external view returns (bool) {
        uint256 currentDay = block.timestamp / 1 days;
        
        // If it's a new day, reset the counter
        if (lastDepositDay[user] != currentDay) {
            return amount <= maxDepositPerDay;
        }
        
        // Check if adding this amount would exceed daily limit
        return dailyDeposits[user] + amount <= maxDepositPerDay;
    }

    /// @notice Get user's remaining daily deposit allowance.
    function getRemainingDailyDeposit(address user) external view returns (uint256) {
        uint256 currentDay = block.timestamp / 1 days;
        
        // If it's a new day, reset the counter
        if (lastDepositDay[user] != currentDay) {
            return maxDepositPerDay;
        }
        
        // Return remaining allowance
        if (dailyDeposits[user] >= maxDepositPerDay) {
            return 0;
        }
        return maxDepositPerDay - dailyDeposits[user];
    }

    /// @notice Check if deposits are blocked due to 24-hour pre-maturity restriction.
    function isDepositBlocked() public view returns (bool) {
        return block.timestamp >= maturityTimestamp - DEPOSIT_BLOCK_PERIOD;
    }

    /// @notice Return decimals to match underlying token
    function decimals() public view override returns (uint8) {
        return _underlyingDecimals;
    }

    // -------- Admin (issuer) controls --------

    /// @notice Pause or unpause new deposits (withdrawals remain available after maturity).
    function setDepositsPaused(bool paused) external onlyRole(ISSUER_ROLE) {
        depositsPaused = paused;
        emit DepositsPausedSet(paused);
    }

    /// @notice Update the trusted quote signer.
    function setQuoteSigner(address newSigner) external onlyRole(ISSUER_ROLE) {
        require(newSigner != address(0), "bad signer");
        address old = quoteSigner;
        quoteSigner = newSigner;
        emit QuoteSignerSet(old, newSigner);
    }

    /// @notice Optional cap on total face (totalSupply). 0 disables the cap.
    function setFaceCap(uint256 newCap) external onlyRole(ISSUER_ROLE) {
        require(newCap == 0 || newCap >= totalSupply(), "cap < supply");
        uint256 old = faceCap;
        faceCap = newCap;
        emit FaceCapSet(old, newCap);
    }

    /// @notice Set maximum age of quotes in seconds.
    function setMaxQuoteAge(uint256 newAge) external onlyRole(ISSUER_ROLE) {
        require(newAge > 0, "age must be > 0");
        uint256 old = maxQuoteAge;
        maxQuoteAge = newAge;
        emit MaxQuoteAgeSet(old, newAge);
    }

    /// @notice Set minimum deposit amount per transaction.
    function setMinDepositAmount(uint256 newAmount) external onlyRole(ISSUER_ROLE) {
        require(newAmount > 0, "min = 0");
        require(newAmount <= maxDepositAmount, "min > max per tx");
        uint256 old = minDepositAmount;
        minDepositAmount = newAmount;
        emit MinDepositAmountSet(old, newAmount);
    }

    /// @notice Set maximum deposit amount per transaction.
    function setMaxDepositAmount(uint256 newAmount) external onlyRole(ISSUER_ROLE) {
        require(newAmount > minDepositAmount, "max must be > min");
        require(newAmount <= maxDepositPerDay, "max per tx > max per day");
        uint256 old = maxDepositAmount;
        maxDepositAmount = newAmount;
        emit MaxDepositAmountSet(old, newAmount);
    }

    /// @notice Set maximum deposit amount per user per day.
    function setMaxDepositPerDay(uint256 newAmount) external onlyRole(ISSUER_ROLE) {
        require(newAmount >= maxDepositAmount, "day cap < tx cap");
        uint256 old = maxDepositPerDay;
        maxDepositPerDay = newAmount;
        emit MaxDepositPerDaySet(old, newAmount);
    }

    // -------- Core flows --------

    /**
     * @notice Deposit underlying token per a signed quote and mint fTOKEN based on fixYield.
     * @dev Contract calculates fyAmount based on fixYield and time remaining to maturity.
     */
    function deposit(
        uint256 depositAmount,
        uint256 fixYield,
        uint256 qMaturityTimestamp,
        uint256 quoteTimestamp,
        uint256 nonce,
        bytes memory signature
    ) external nonReentrant {
        require(!depositsPaused, "deposits paused");
        require(block.timestamp < maturityTimestamp, "matured");
        require(!isDepositBlocked(), "deposits blocked 24h before maturity");
        require(!usedNonce[msg.sender][nonce], "nonce used");
        require(depositAmount > 0, "zero");

        // Enhanced quote validation
        require(depositAmount >= minDepositAmount, "deposit too small");
        require(depositAmount <= maxDepositAmount, "deposit too large");
        
        // Quote age validation
        require(quoteTimestamp <= block.timestamp, "quote from future");
        require(block.timestamp - quoteTimestamp <= maxQuoteAge, "quote too old");
        
        // Maturity validation
        require(qMaturityTimestamp == maturityTimestamp, "maturity mismatch");
        
        // Daily deposit limit validation
        uint256 currentDay = block.timestamp / 1 days;
        if (lastDepositDay[msg.sender] != currentDay) {
            // New day, reset counter
            dailyDeposits[msg.sender] = 0;
            lastDepositDay[msg.sender] = currentDay;
        }
        require(dailyDeposits[msg.sender] + depositAmount <= maxDepositPerDay, "daily limit exceeded");

        // Verify EIP-712 signature
        bytes32 structHash = keccak256(
            abi.encode(
                QUOTE_TYPEHASH,
                msg.sender,
                depositAmount,    // NEW
                fixYield,
                qMaturityTimestamp,
                quoteTimestamp,
                nonce
            )
        );
        bytes32 digest = _hashTypedDataV4(structHash);
        address recovered = ECDSA.recover(digest, signature);
        require(recovered == quoteSigner, "bad signer");

        // CONTRACT CALCULATES fyAmount based on fixYield and current time
        uint256 fyAmount = calculateFyAmount(depositAmount, fixYield, quoteTimestamp);

        // Optional face cap
        if (faceCap != 0) {
            require(totalSupply() + fyAmount <= faceCap, "face cap");
        }

        // Effects
        usedNonce[msg.sender][nonce] = true;
        dailyDeposits[msg.sender] += depositAmount;

        // Pull underlying token in full
        underlyingToken.safeTransferFrom(msg.sender, address(this), depositAmount);

        // Mint fTOKEN (calculated amount) to user
        _mint(msg.sender, fyAmount);

        emit Deposit(msg.sender, depositAmount, fyAmount, nonce, fixYield, quoteTimestamp);
    }

    /**
     * @notice Request withdrawal of all fTOKEN for underlying token at/after maturity.
     * @dev This queues the withdrawal request instead of immediate execution.
     * @dev Only allows full balance withdrawal - partial withdrawals not supported after maturity.
     */
    function requestWithdrawal() external nonReentrant {
        require(block.timestamp >= maturityTimestamp, "not matured");
        
        uint256 fyAmount = balanceOf(msg.sender);
        require(fyAmount > 0, "no balance to withdraw");

        // Burn fTOKEN immediately
        _burn(msg.sender, fyAmount);

        // Calculate underlying amount (1:1 at maturity)
        uint256 underlyingAmount = fyAmount;

        // Create withdrawal request
        uint256 requestId = queueBack;
        withdrawalQueue[requestId] = WithdrawalRequest({
            user: msg.sender,
            fyAmount: fyAmount,
            underlyingAmount: underlyingAmount,
            timestamp: block.timestamp,
            processed: false
        });

        // Update queue state
        queueBack++;
        pendingWithdrawals += underlyingAmount;
        userPendingWithdrawals[msg.sender] += underlyingAmount;

        emit WithdrawalRequested(msg.sender, requestId, fyAmount, underlyingAmount);
    }

    /**
     * @notice Process withdrawal request by authorized processor.
     * @dev This function can be called by WITHDRAWAL_QUEUE_PROCESSOR_ROLE.
     */
    function processWithdrawal(uint256 requestId) external nonReentrant onlyRole(WITHDRAWAL_QUEUE_PROCESSOR_ROLE) {
        require(requestId == queueFront, "not next in queue");
        require(requestId < queueBack, "invalid request id");

        WithdrawalRequest storage request = withdrawalQueue[requestId];
        require(!request.processed && request.user != address(0), "bad request");

        request.processed = true;
        pendingWithdrawals -= request.underlyingAmount;
        userPendingWithdrawals[request.user] -= request.underlyingAmount;
        underlyingToken.safeTransfer(request.user, request.underlyingAmount);

        unchecked { queueFront++; }
        emit WithdrawalProcessed(request.user, requestId, request.underlyingAmount, msg.sender);
    }

    /**
     * @notice Process multiple withdrawal requests in batch.
     * @dev Gas efficient way to process multiple requests.
     */
    function processWithdrawalsBatch(uint256[] calldata requestIds) external nonReentrant onlyRole(WITHDRAWAL_QUEUE_PROCESSOR_ROLE) {
        uint256 expected = queueFront;
        for (uint256 i = 0; i < requestIds.length; ) {
            uint256 requestId = requestIds[i];
            require(requestId == expected, "non-contiguous batch");
            require(requestId < queueBack, "invalid request id");

            WithdrawalRequest storage request = withdrawalQueue[requestId];
            require(!request.processed && request.user != address(0), "bad request");

            request.processed = true;
            pendingWithdrawals -= request.underlyingAmount;
            userPendingWithdrawals[request.user] -= request.underlyingAmount;
            underlyingToken.safeTransfer(request.user, request.underlyingAmount);

            unchecked { ++expected; ++i; }
            emit WithdrawalProcessed(request.user, requestId, request.underlyingAmount, msg.sender);
        }
        queueFront = expected;
    }

    // -------- Rho Management (Issuer + Asset Manager) --------

    /// @notice Set the allowlisted Rho recipient (strategy)
    function setRhoTarget(address target) external onlyRole(ISSUER_ROLE) {
        require(target != address(0), "rho target=0");
        address old = rhoTarget;
        rhoTarget = target;
        emit RhoTargetSet(old, target);
    }

    /// @notice Set the minimum idle liquidity buffer, in bps of liability
    function setMinLiquidityBufferBps(uint256 bps) external onlyRole(ISSUER_ROLE) {
        require(bps <= BPS_DENOMINATOR, "bps>100%");
        uint256 old = minLiquidityBufferBps;
        minLiquidityBufferBps = bps;
        emit MinLiquidityBufferBpsSet(old, bps);
    }

    /// @notice Move free assets to the allowlisted Rho target (by Asset Manager)
    /// @dev Keeps a buffer so processors/ops can service withdrawals/liquidity needs.
    function moveToRho(uint256 amount) external onlyRole(ASSET_MANAGER_ROLE) nonReentrant {
        require(rhoTarget != address(0), "rho not set");
        require(amount > 0, "zero amount");

        // Buffer against current liability
        uint256 liability = totalSupply() + pendingWithdrawals;
        uint256 bufferMin = (liability * minLiquidityBufferBps) / BPS_DENOMINATOR;

        uint256 free = freeAssets();
        require(free > bufferMin, "no free above buffer");
        require(amount <= free - bufferMin, "exceeds buffer");

        underlyingToken.safeTransfer(rhoTarget, amount);
        emit MovedToRho(amount);
    }

    /// @notice Allow Rho to push underlying back into the vault
    /// @dev Rho must approve(this) first; callable only by rhoTarget
    function depositUnderlyingFromRho(uint256 amount) external nonReentrant {
        require(msg.sender == rhoTarget, "not rho");
        require(amount > 0, "zero amount");
        underlyingToken.safeTransferFrom(msg.sender, address(this), amount);
        emit PulledFromRho(amount);
    }

    // -------- Asset Management (Issuer only) --------

    /**
     * @notice Withdraw underlying tokens from the contract (for Rho operations).
     * @dev Only ISSUER_ROLE can call this function.
     * @dev Cannot withdraw more than freeAssets() to ensure vault solvency.
     */
    function withdrawUnderlying(uint256 amount, address to) external onlyRole(ISSUER_ROLE) nonReentrant {
        require(to != address(0), "bad recipient");
        require(amount > 0, "zero amount");
        require(amount <= freeAssets(), "insufficient free assets");
        
        underlyingToken.safeTransfer(to, amount);
    }

    /**
     * @notice Deposit underlying tokens back to the contract.
     * @dev Only ISSUER_ROLE can call this function.
     * @dev This is used to provide additional underlying tokens to cover yield payments.
     */
    function depositUnderlying(uint256 amount) external onlyRole(ISSUER_ROLE) nonReentrant {
        require(amount > 0, "zero amount");
        
        underlyingToken.safeTransferFrom(msg.sender, address(this), amount);
    }

    /**
     * @notice Get the vault's solvency status.
     * @dev Returns true if the vault has enough underlying tokens to pay all fTOKEN at maturity.
     */
    function isSolvent() external view returns (bool) {
        return underlyingHeld() >= totalSupply() + pendingWithdrawals;
    }

    /**
     * @notice Get the amount of additional underlying tokens needed for solvency.
     * @dev Returns 0 if the vault is already solvent.
     */
    function additionalTokensNeeded() external view returns (uint256) {
        uint256 liability = totalSupply() + pendingWithdrawals;
        uint256 held = underlyingHeld();
        return liability > held ? liability - held : 0;
    }

    // -------- Internal Functions --------

    /**
     * @dev Override _update to prevent transfers after maturity
     * This ensures fTOKEN tokens cannot be transferred after maturity for security
     */
    function _update(
        address from,
        address to,
        uint256 value
    ) internal virtual override {
        // Allow minting and burning operations
        if (from == address(0) || to == address(0)) {
            super._update(from, to, value);
            return;
        }

        // Prevent transfers after maturity for security
        if (block.timestamp >= maturityTimestamp) {
            revert("Bond matured - transfers not allowed");
        }

        super._update(from, to, value);
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (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;
    }

    /// @inheritdoc IERC20
    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    /// @inheritdoc IERC20
    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;
    }

    /// @inheritdoc IERC20
    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);
            }
        }
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol": {
      "content": "// 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);
}
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
      "content": "// 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);
}
"
    },
    "lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol": {
      "content": "// 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);
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/utils/ReentrancyGuard.sol": {
      "content": "// 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;
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/utils/cryptography/EIP712.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/cryptography/EIP712.sol)

pragma solidity ^0.8.20;

import {MessageHashUtils} from "./MessageHashUtils.sol";
import {ShortStrings, ShortString} from "../ShortStrings.sol";
import {IERC5267} from "../../interfaces/IERC5267.sol";

/**
 * @dev https://eips.ethereum.org/EIPS/eip-712[EIP-712] is a standard for hashing and signing of typed structured data.
 *
 * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose
 * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract
 * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to
 * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`.
 *
 * This contract implements the EIP-712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
 * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
 * ({_hashTypedDataV4}).
 *
 * The implementation of the domain separator was designed to be as efficient as possible while still properly updating
 * the chain id to protect against replay attacks on an eventual fork of the chain.
 *
 * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
 * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
 *
 * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
 * separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the
 * separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
 *
 * @custom:oz-upgrades-unsafe-allow state-variable-immutable
 */
abstract contract EIP712 is IERC5267 {
    using ShortStrings for *;

    bytes32 private constant TYPE_HASH =
        keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _cachedDomainSeparator;
    uint256 private immutable _cachedChainId;
    address private immutable _cachedThis;

    bytes32 private immutable _hashedName;
    bytes32 private immutable _hashedVersion;

    ShortString private immutable _name;
    ShortString private immutable _version;
    // slither-disable-next-line constable-states
    string private _nameFallback;
    // slither-disable-next-line constable-states
    string private _versionFallback;

    /**
     * @dev Initializes the domain separator and parameter caches.
     *
     * The meaning of `name` and `version` is specified in
     * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP-712]:
     *
     * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
     * - `version`: the current major version of the signing domain.
     *
     * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
     * contract upgrade].
     */
    constructor(string memory name, string memory version) {
        _name = name.toShortStringWithFallback(_nameFallback);
        _version = version.toShortStringWithFallback(_versionFallback);
        _hashedName = keccak256(bytes(name));
        _hashedVersion = keccak256(bytes(version));

        _cachedChainId = block.chainid;
        _cachedDomainSeparator = _buildDomainSeparator();
        _cachedThis = address(this);
    }

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
            return _cachedDomainSeparator;
        } else {
            return _buildDomainSeparator();
        }
    }

    function _buildDomainSeparator() private view returns (bytes32) {
        return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    /// @inheritdoc IERC5267
    function eip712Domain()
        public
        view
        virtual
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        )
    {
        return (
            hex"0f", // 01111
            _EIP712Name(),
            _EIP712Version(),
            block.chainid,
            address(this),
            bytes32(0),
            new uint256[](0)
        );
    }

    /**
     * @dev The name parameter for the EIP712 domain.
     *
     * NOTE: By default this function reads _name which is an immutable value.
     * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
     */
    // solhint-disable-next-line func-name-mixedcase
    function _EIP712Name() internal view returns (string memory) {
        return _name.toStringWithFallback(_nameFallback);
    }

    /**
     * @dev The version parameter for the EIP712 domain.
     *
     * NOTE: By default this function reads _version which is an immutable value.
     * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
     */
    // solhint-disable-next-line func-name-mixedcase
    function _EIP712Version() internal view returns (string memory) {
        return _version.toStringWithFallback(_versionFallback);
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/utils/cryptography/ECDSA.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.20;

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS
    }

    /**
     * @dev The signature derives the `address(0)`.
     */
    error ECDSAInvalidSignature();

    /**
     * @dev The signature has an invalid length.
     */
    error ECDSAInvalidSignatureLength(uint256 length);

    /**
     * @dev The signature has an S value that is in the upper half order.
     */
    error ECDSAInvalidSignatureS(bytes32 s);

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
     * return address(0) without also returning an error description. Errors are documented using an enum (error type)
     * and a bytes32 providing additional information about the error.
     *
     * If no error is returned, then the address can be used for verification purposes.
     *
     * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     */
    function tryRecover(
        bytes32 hash,
        bytes memory signature
    ) internal pure returns (address recovered, RecoverError err, bytes32 errArg) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            assembly ("memory-safe") {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length