DepositVaultFactory

{{
  "language": "Solidity",
  "sources": {
    "src/DepositVaultFactory.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {ERC1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {IERC20Upgradeable} from "@openzeppelin-upgradeable/contracts/interfaces/IERC20Upgradeable.sol";

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

/**
 * @title DepositVaultFactory
 * @dev Factory contract for deploying and managing multiple DepositVault instances
 * @notice This contract allows for easy deployment of new vaults with standardized configurations
 */
contract DepositVaultFactory is Ownable {
    /// @notice The implementation contract address for all vault proxies
    address public immutable vaultImplementation;

    /// @notice Array of all vault addresses
    address[] public vaults;

    /// @notice Default configuration for new vaults
    struct DefaultConfig {
        uint256 minLockDuration; // Default: 1 day
        uint256 maxLockDuration; // Default: 365 days
        address defaultMultisig; // Default multisig (can be overridden)
    }

    DefaultConfig public defaultConfig;

    // Events
    event VaultDeployed(
        address indexed vault,
        address indexed asset,
        string name,
        string symbol,
        uint256 lockDuration,
        address indexed deployer
    );

    event VaultStatusUpdated(address indexed vault, bool isActive);
    event DefaultConfigUpdated(uint256 minLockDuration, uint256 maxLockDuration, address defaultMultisig);
    event ImplementationUpdated(address indexed oldImplementation, address indexed newImplementation);

    // Errors
    error InvalidAsset();
    error InvalidLockDuration();
    error InvalidMultisigWallet();
    error VaultNotFound();
    error VaultAlreadyExists();
    error UnauthorizedVault();

    constructor(address _vaultImplementation, address _defaultMultisig) {
        if (_vaultImplementation == address(0)) revert InvalidAsset();

        vaultImplementation = _vaultImplementation;

        // Set default configuration
        defaultConfig =
            DefaultConfig({minLockDuration: 1 days, maxLockDuration: 365 days, defaultMultisig: _defaultMultisig});
    }

    /**
     * @notice Deploy a new DepositVault with standard configuration
     * @param asset The underlying ERC20 asset
     * @param name The name of the vault token
     * @param symbol The symbol of the vault token
     * @param lockDuration The lock duration for deposits
     * @param multisigWallet The multisig wallet (use address(0) for default)
     * @return vault The address of the deployed vault
     */
    function deployVault(
        address asset,
        string memory name,
        string memory symbol,
        uint256 lockDuration,
        address multisigWallet
    ) external returns (address vault) {
        return _deployVaultInternal(asset, name, symbol, lockDuration, multisigWallet);
    }

    /**
     * @notice Internal function to deploy a new DepositVault
     */
    function _deployVaultInternal(
        address asset,
        string memory name,
        string memory symbol,
        uint256 lockDuration,
        address multisigWallet
    ) internal returns (address vault) {
        if (asset == address(0)) revert InvalidAsset();
        if (lockDuration == 0) revert InvalidLockDuration();

        // Use default multisig if not provided
        address _multisig = multisigWallet == address(0) ? defaultConfig.defaultMultisig : multisigWallet;

        if (_multisig == address(0)) revert InvalidMultisigWallet();

        // Create initialization data
        bytes memory initData = abi.encodeWithSelector(
            DepositVault.initialize.selector,
            IERC20Upgradeable(asset),
            name,
            symbol,
            lockDuration,
            _multisig,
            defaultConfig.minLockDuration,
            defaultConfig.maxLockDuration
        );

        // Deploy proxy
        vault = address(new ERC1967Proxy(vaultImplementation, initData));

        vaults.push(vault);

        emit VaultDeployed(vault, asset, name, symbol, lockDuration, msg.sender);
    }

    /**
     * @notice Get all deployed vaults
     * @return Array of all vault addresses
     */
    function getAllVaults() external view returns (address[] memory) {
        return vaults;
    }

    /**
     * @notice Get total number of deployed vaults
     * @return The number of deployed vaults
     */
    function getVaultCount() external view returns (uint256) {
        return vaults.length;
    }

    /**
     * @notice Update default configuration (only owner)
     * @param minLockDuration New minimum lock duration
     * @param maxLockDuration New maximum lock duration
     * @param defaultMultisig New default multisig address
     */
    function updateDefaultConfig(uint256 minLockDuration, uint256 maxLockDuration, address defaultMultisig)
        external
        onlyOwner
    {
        if (minLockDuration == 0 || maxLockDuration == 0 || minLockDuration >= maxLockDuration) {
            revert InvalidLockDuration();
        }

        defaultConfig.minLockDuration = minLockDuration;
        defaultConfig.maxLockDuration = maxLockDuration;
        defaultConfig.defaultMultisig = defaultMultisig;

        emit DefaultConfigUpdated(minLockDuration, maxLockDuration, defaultMultisig);
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/proxy/ERC1967/ERC1967Proxy.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/ERC1967/ERC1967Proxy.sol)

pragma solidity ^0.8.0;

import "../Proxy.sol";
import "./ERC1967Upgrade.sol";

/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializing the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        _upgradeToAndCall(_logic, _data, false);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @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 {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _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);
    }
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/interfaces/IERC20Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/IERC20Upgradeable.sol";
"
    },
    "src/DepositVault.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

import {ERC4626Upgradeable} from "@openzeppelin-upgradeable/contracts/token/ERC20/extensions/ERC4626Upgradeable.sol";
import {SafeERC20Upgradeable} from "@openzeppelin-upgradeable/contracts/token/ERC20/utils/SafeERC20Upgradeable.sol";
import {IERC20Upgradeable} from "@openzeppelin-upgradeable/contracts/interfaces/IERC20Upgradeable.sol";
import {OwnableUpgradeable} from "@openzeppelin-upgradeable/contracts/access/OwnableUpgradeable.sol";
import {Initializable} from "@openzeppelin-upgradeable/contracts/proxy/utils/Initializable.sol";
import {PausableUpgradeable} from "@openzeppelin-upgradeable/contracts/security/PausableUpgradeable.sol";
import {UUPSUpgradeable} from "@openzeppelin-upgradeable/contracts/proxy/utils/UUPSUpgradeable.sol";

contract DepositVault is Initializable, ERC4626Upgradeable, OwnableUpgradeable, PausableUpgradeable, UUPSUpgradeable {
    using SafeERC20Upgradeable for IERC20Upgradeable;

    uint256 public lockDuration;
    uint256 public minLockDuration;
    uint256 public maxLockDuration;
    mapping(address => uint256) public userLockTimestamp;
    mapping(address => uint256) public userDepositAmount;

    bool public emergencyUnlockEnabled;

    // Deposit limits and access control
    uint256 public maxDepositPerWallet;
    uint256 public vaultDepositCap;
    uint256 public minDepositAmount;
    mapping(address => bool) public denyList;
    mapping(address => bool) public whitelist;
    bool public whitelistEnabled;
    uint256 public minFirstDepositAmount;

    // Multisig wallet for asset transfers
    address public multisigWallet;

    uint256[50] private __gap;

    event Deposited(address indexed user, uint256 assets, uint256 shares, uint256 unlockTime);
    event LockDurationUpdated(uint256 oldDuration, uint256 newDuration);
    event EmergencyUnlockToggled(bool enabled);
    event MaxDepositPerWalletUpdated(uint256 oldLimit, uint256 newLimit);
    event VaultDepositCapUpdated(uint256 oldCap, uint256 newCap);
    event DenyListUpdated(address indexed user, bool denied);
    event WhitelistUpdated(address indexed user, bool whitelisted);
    event WhitelistEnabledUpdated(bool enabled);
    event MinDepositAmountUpdated(uint256 oldAmount, uint256 newAmount);
    event MinFirstDepositAmountUpdated(uint256 oldAmount, uint256 newAmount);
    event MultisigWalletUpdated(address indexed oldWallet, address indexed newWallet);
    event AssetsTransferredToMultisig(uint256 amount, address indexed multisig);

    error WithdrawalLocked(address user, uint256 unlockTime);
    error ZeroAmount();
    error NotAuthorized();
    error ExceedsMaxDepositPerWallet(uint256 currentDeposit, uint256 attemptedDeposit, uint256 maxAllowed);
    error ExceedsVaultDepositCap(uint256 currentTotal, uint256 attemptedDeposit, uint256 maxCap);
    error UserOnDenyList(address user);
    error UserNotWhitelisted(address user);
    error BelowMinimumDeposit(uint256 attemptedDeposit, uint256 minRequired);
    error BelowMinimumFirstDeposit(uint256 attemptedDeposit, uint256 minRequired);
    error MultisigWalletNotSet();
    error InvalidMultisigWallet();
    error InvalidLockDuration();
    error LockDurationOutOfBounds(uint256 provided, uint256 min, uint256 max);

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    function initialize(
        IERC20Upgradeable asset_,
        string memory name_,
        string memory symbol_,
        uint256 lockDuration_,
        address multisigWallet_,
        uint256 minLockDuration_,
        uint256 maxLockDuration_
    ) public initializer {
        if (lockDuration_ == 0) {
            revert InvalidLockDuration();
        }

        if (multisigWallet_ == address(0)) {
            revert InvalidMultisigWallet();
        }

        if (minLockDuration_ == 0 || maxLockDuration_ == 0 || minLockDuration_ >= maxLockDuration_) {
            revert InvalidLockDuration();
        }

        if (lockDuration_ < minLockDuration_ || lockDuration_ > maxLockDuration_) {
            revert LockDurationOutOfBounds(lockDuration_, minLockDuration_, maxLockDuration_);
        }

        __ERC4626_init(asset_);
        __ERC20_init(name_, symbol_);
        __Ownable_init();
        __Pausable_init();
        __UUPSUpgradeable_init();

        lockDuration = lockDuration_;
        minLockDuration = minLockDuration_;
        maxLockDuration = maxLockDuration_;

        // Initialize deposit settings - defaults to no limits
        maxDepositPerWallet = type(uint256).max;
        vaultDepositCap = type(uint256).max;
        minDepositAmount = 0; // No minimum by default
        minFirstDepositAmount = 1e18; // Default to 1 token for inflation protection

        multisigWallet = multisigWallet_;
    }

    function deposit(uint256 assets, address receiver) public virtual override whenNotPaused returns (uint256 shares) {
        if (assets == 0) revert ZeroAmount();

        // This check is critical to prevent the re-locking attack.
        if (receiver != msg.sender) revert NotAuthorized();

        _checkDepositAllowed(receiver, assets);

        shares = super.deposit(assets, receiver);

        _handleDepositLock(receiver, assets, shares);

        return shares;
    }

    function mint(uint256 shares, address receiver) public virtual override whenNotPaused returns (uint256 assets) {
        if (shares == 0) revert ZeroAmount();

        // This check is critical to prevent the re-locking attack.
        if (receiver != msg.sender) revert NotAuthorized();

        assets = previewMint(shares);
        _checkDepositAllowed(receiver, assets);

        assets = super.mint(shares, receiver);

        _handleDepositLock(receiver, assets, shares);

        return assets;
    }

    function withdraw(uint256 assets, address receiver, address owner)
        public
        virtual
        override
        returns (uint256 shares)
    {
        if (!_canWithdraw(owner)) {
            uint256 unlockTime = userLockTimestamp[owner] + lockDuration;

            revert WithdrawalLocked(owner, unlockTime);
        }

        shares = super.withdraw(assets, receiver, owner);

        if (userDepositAmount[owner] >= assets) {
            userDepositAmount[owner] -= assets;
        } else {
            userDepositAmount[owner] = 0;
        }

        return shares;
    }

    function redeem(uint256 shares, address receiver, address owner) public virtual override returns (uint256 assets) {
        if (!_canWithdraw(owner)) {
            uint256 unlockTime = userLockTimestamp[owner] + lockDuration;
            assets = previewRedeem(shares);

            revert WithdrawalLocked(owner, unlockTime);
        }

        assets = super.redeem(shares, receiver, owner);

        if (userDepositAmount[owner] >= assets) {
            userDepositAmount[owner] -= assets;
        } else {
            userDepositAmount[owner] = 0;
        }

        return assets;
    }

    function _canWithdraw(address user) internal view returns (bool) {
        if (emergencyUnlockEnabled) {
            return true;
        }

        if (userLockTimestamp[user] == 0) {
            return true;
        }

        return block.timestamp >= userLockTimestamp[user] + lockDuration;
    }

    function getUserUnlockTime(address user) external view returns (uint256) {
        if (userLockTimestamp[user] == 0) {
            return 0;
        }

        return userLockTimestamp[user] + lockDuration;
    }

    function canUserWithdraw(address user) external view returns (bool) {
        return _canWithdraw(user);
    }

    function getRemainingLockTime(address user) external view returns (uint256) {
        if (_canWithdraw(user)) {
            return 0;
        }

        uint256 unlockTime = userLockTimestamp[user] + lockDuration;

        return unlockTime - block.timestamp;
    }

    function setLockDuration(uint256 newLockDuration) external onlyOwner {
        if (newLockDuration < minLockDuration || newLockDuration > maxLockDuration) {
            revert LockDurationOutOfBounds(newLockDuration, minLockDuration, maxLockDuration);
        }

        uint256 oldDuration = lockDuration;
        lockDuration = newLockDuration;

        emit LockDurationUpdated(oldDuration, newLockDuration);
    }

    function toggleEmergencyUnlock() external onlyOwner {
        emergencyUnlockEnabled = !emergencyUnlockEnabled;

        emit EmergencyUnlockToggled(emergencyUnlockEnabled);
    }

    function setMaxDepositPerWallet(uint256 newMaxDeposit) external onlyOwner {
        uint256 oldLimit = maxDepositPerWallet;
        maxDepositPerWallet = newMaxDeposit;

        emit MaxDepositPerWalletUpdated(oldLimit, newMaxDeposit);
    }

    function setVaultDepositCap(uint256 newDepositCap) external onlyOwner {
        uint256 oldCap = vaultDepositCap;
        vaultDepositCap = newDepositCap;

        emit VaultDepositCapUpdated(oldCap, newDepositCap);
    }

    function updateDenyList(address user, bool denied) external onlyOwner {
        denyList[user] = denied;

        emit DenyListUpdated(user, denied);
    }

    function batchUpdateDenyList(address[] calldata users, bool denied) external onlyOwner {
        for (uint256 i = 0; i < users.length; i++) {
            denyList[users[i]] = denied;

            emit DenyListUpdated(users[i], denied);
        }
    }

    function updateWhitelist(address user, bool whitelisted) external onlyOwner {
        whitelist[user] = whitelisted;

        emit WhitelistUpdated(user, whitelisted);
    }

    function batchUpdateWhitelist(address[] calldata users, bool whitelisted) external onlyOwner {
        for (uint256 i = 0; i < users.length; i++) {
            whitelist[users[i]] = whitelisted;

            emit WhitelistUpdated(users[i], whitelisted);
        }
    }

    function setWhitelistEnabled(bool enabled) external onlyOwner {
        whitelistEnabled = enabled;

        emit WhitelistEnabledUpdated(enabled);
    }

    function setMinDepositAmount(uint256 newMinAmount) external onlyOwner {
        uint256 oldAmount = minDepositAmount;
        minDepositAmount = newMinAmount;

        emit MinDepositAmountUpdated(oldAmount, newMinAmount);
    }

    function setMinFirstDepositAmount(uint256 newMinFirstAmount) external onlyOwner {
        uint256 oldAmount = minFirstDepositAmount;
        minFirstDepositAmount = newMinFirstAmount;

        emit MinFirstDepositAmountUpdated(oldAmount, newMinFirstAmount);
    }

    function setMultisigWallet(address newMultisigWallet) external onlyOwner {
        if (newMultisigWallet == address(0)) {
            revert InvalidMultisigWallet();
        }

        address oldWallet = multisigWallet;
        multisigWallet = newMultisigWallet;

        emit MultisigWalletUpdated(oldWallet, newMultisigWallet);
    }

    function transferAssets(uint256 amount) external onlyOwner {
        if (multisigWallet == address(0)) {
            revert MultisigWalletNotSet();
        }

        if (amount == 0) {
            revert ZeroAmount();
        }

        IERC20Upgradeable assetToken = IERC20Upgradeable(asset());
        uint256 contractBalance = assetToken.balanceOf(address(this));

        if (amount > contractBalance) {
            amount = contractBalance;
        }

        assetToken.safeTransfer(multisigWallet, amount);

        emit AssetsTransferredToMultisig(amount, multisigWallet);
    }

    function transferAllAssets() external onlyOwner {
        if (multisigWallet == address(0)) {
            revert MultisigWalletNotSet();
        }

        IERC20Upgradeable assetToken = IERC20Upgradeable(asset());
        uint256 contractBalance = assetToken.balanceOf(address(this));

        if (contractBalance == 0) {
            revert ZeroAmount();
        }

        assetToken.safeTransfer(multisigWallet, contractBalance);

        emit AssetsTransferredToMultisig(contractBalance, multisigWallet);
    }

    function _checkDepositAllowed(address receiver, uint256 assets) internal view {
        // Check minimum deposit amount
        if (assets < minDepositAmount) {
            revert BelowMinimumDeposit(assets, minDepositAmount);
        }

        // Check minimum first deposit to prevent inflation attacks
        if (totalSupply() == 0 && assets < minFirstDepositAmount) {
            revert BelowMinimumFirstDeposit(assets, minFirstDepositAmount);
        }

        // Check whitelist first - if user is whitelisted, skip deny list check
        // If whitelist is enabled and user is not whitelisted, they cannot deposit
        if (whitelistEnabled) {
            if (!whitelist[receiver]) {
                revert UserNotWhitelisted(receiver);
            }
        } else {
            // If no whitelist is active, check deny list
            if (denyList[receiver]) {
                revert UserOnDenyList(receiver);
            }
        }

        // Check vault deposit cap
        uint256 currentTotal = totalAssets();
        if (currentTotal + assets > vaultDepositCap) {
            revert ExceedsVaultDepositCap(currentTotal, assets, vaultDepositCap);
        }

        // Check per-wallet deposit limit
        uint256 currentUserDeposit = userDepositAmount[receiver];
        if (currentUserDeposit + assets > maxDepositPerWallet) {
            revert ExceedsMaxDepositPerWallet(currentUserDeposit, assets, maxDepositPerWallet);
        }
    }

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

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

    function _authorizeUpgrade(address newImplementation) internal override onlyOwner {}

    function _handleDepositLock(address receiver, uint256 assets, uint256 shares) internal {
        // This is safe because caller functions check receiver == msg.sender
        if (_canWithdraw(receiver)) {
            userLockTimestamp[receiver] = block.timestamp;
        }

        userDepositAmount[receiver] += assets;

        uint256 unlockTime = userLockTimestamp[receiver] == 0 ? 0 : userLockTimestamp[receiver] + lockDuration;

        emit Deposited(receiver, assets, shares, unlockTime);
    }

    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
        super._beforeTokenTransfer(from, to, amount);

        if (from != address(0) && to != address(0)) {
            if (!_canWithdraw(from)) {
                uint256 unlockTime = userLockTimestamp[from] + lockDuration;

                revert WithdrawalLocked(from, unlockTime);
            }

            // When transferring to a new address, inherit the sender's lock timestamp
            // This ensures the lock period travels with the shares
            if (userLockTimestamp[to] == 0 && userLockTimestamp[from] > 0) {
                userLockTimestamp[to] = userLockTimestamp[from];
            }
        }
    }

    function maxWithdraw(address owner) public view virtual override returns (uint256) {
        if (!_canWithdraw(owner)) {
            return 0;
        }

        return super.maxWithdraw(owner);
    }

    function maxRedeem(address owner) public view virtual override returns (uint256) {
        if (!_canWithdraw(owner)) {
            return 0;
        }

        return super.maxRedeem(owner);
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/proxy/Proxy.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}
"
    },
    "lib/openzeppelin-contracts/contracts/proxy/ERC1967/ERC1967Upgrade.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeacon.sol";
import "../../interfaces/IERC1967.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 */
abstract contract ERC1967Upgrade is IERC1967 {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(address newImplementation, bytes memory data, bool forceCall) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data, bool forceCall) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}
"
    },
    "lib/openzeppelin-contracts/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/IERC20Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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 amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/extensions/ERC4626Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/ERC4626.sol)

pragma solidity ^0.8.0;

import "../ERC20Upgradeable.sol";
import "../utils/SafeERC20Upgradeable.sol";
import "../../../interfaces/IERC4626Upgradeable.sol";
import "../../../utils/math/MathUpgradeable.sol";
import {Initializable} from "../../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the ERC4626 "Tokenized Vault Standard" as defined in
 * https://eips.ethereum.org/EIPS/eip-4626[EIP-4626].
 *
 * This extension allows the minting and burning of "shares" (represented using the ERC20 inheritance) in exchange for
 * underlying "assets" through standardized {deposit}, {mint}, {redeem} and {burn} workflows. This contract extends
 * the ERC20 standard. Any additional extensions included along it would affect the "shares" token represented by this
 * contract and not the "assets" token which is an independent contract.
 *
 * [CAUTION]
 * ====
 * In empty (or nearly empty) ERC-4626 vaults, deposits are at high risk of being stolen through frontrunning
 * with a "donation" to the vault that inflates the price of a share. This is variously known as a donation or inflation
 * attack and is essentially a problem of slippage. Vault deployers can protect against this attack by making an initial
 * deposit of a non-trivial amount of the asset, such that price manipulation becomes infeasible. Withdrawals may
 * similarly be affected by slippage. Users can protect against this attack as well as unexpected slippage in general by
 * verifying the amount received is as expected, using a wrapper that performs these checks such as
 * https://github.com/fei-protocol/ERC4626#erc4626router-and-base[ERC4626Router].
 *
 * Since v4.9, this implementation uses virtual assets and shares to mitigate that risk. The `_decimalsOffset()`
 * corresponds to an offset in the decimal representation between the underlying asset's decimals and the vault
 * decimals. This offset also determines the rate of virtual shares to virtual assets in the vault, which itself
 * determines the initial exchange rate. While not fully preventing the attack, analysis shows that the default offset
 * (0) makes it non-profitable, as a result of the value being captured by the virtual shares (out of the attacker's
 * donation) matching the attacker's expected gains. With a larger offset, the attack becomes orders of magnitude more
 * expensive than it is profitable. More details about the underlying math can be found
 * xref:erc4626.adoc#inflation-attack[here].
 *
 * The drawback of this approach is that the virtual shares do capture (a very small) part of the value being accrued
 * to the vault. Also, if the vault experiences losses, the users try to exit the vault, the virtual shares and assets
 * will cause the first user to exit to experience reduced losses in detriment to the last users that will experience
 * bigger losses. Developers willing to revert back to the pre-v4.9 behavior just need to override the
 * `_convertToShares` and `_convertToAssets` functions.
 *
 * To learn more, check out our xref:ROOT:erc4626.adoc[ERC-4626 guide].
 * ====
 *
 * _Available since v4.7._
 */
abstract contract ERC4626Upgradeable is Initializable, ERC20Upgradeable, IERC4626Upgradeable {
    using MathUpgradeable for uint256;

    IERC20Upgradeable private _asset;
    uint8 private _underlyingDecimals;

    /**
     * @dev Set the underlying asset contract. This must be an ERC20-compatible contract (ERC20 or ERC777).
     */
    function __ERC4626_init(IERC20Upgradeable asset_) internal onlyInitializing {
        __ERC4626_init_unchained(asset_);
    }

    function __ERC4626_init_unchained(IERC20Upgradeable asset_) internal onlyInitializing {
        (bool success, uint8 assetDecimals) = _tryGetAssetDecimals(asset_);
        _underlyingDecimals = success ? assetDecimals : 18;
        _asset = asset_;
    }

    /**
     * @dev Attempts to fetch the asset decimals. A return value of false indicates that the attempt failed in some way.
     */
    function _tryGetAssetDecimals(IERC20Upgradeable asset_) private view returns (bool, uint8) {
        (bool success, bytes memory encodedDecimals) = address(asset_).staticcall(
            abi.encodeWithSelector(IERC20MetadataUpgradeable.decimals.selector)
        );
        if (success && encodedDecimals.length >= 32) {
            uint256 returnedDecimals = abi.decode(encodedDecimals, (uint256));
            if (returnedDecimals <= type(uint8).max) {
                return (true, uint8(returnedDecimals));
            }
        }
        return (false, 0);
    }

    /**
     * @dev Decimals are computed by adding the decimal offset on top of the underlying asset's decimals. This
     * "original" value is cached during construction of the vault contract. If this read operation fails (e.g., the
     * asset has not been created yet), a default of 18 is used to represent the underlying asset's decimals.
     *
     * See {IERC20Metadata-decimals}.
     */
    function decimals() public view virtual override(IERC20MetadataUpgradeable, ERC20Upgradeable) returns (uint8) {
        return _underlyingDecimals + _decimalsOffset();
    }

    /** @dev See {IERC4626-asset}. */
    function asset() public view virtual override returns (address) {
        return address(_asset);
    }

    /** @dev See {IERC4626-totalAssets}. */
    function totalAssets() public view virtual override returns (uint256) {
        return _asset.balanceOf(address(this));
    }

    /** @dev See {IERC4626-convertToShares}. */
    function convertToShares(uint256 assets) public view virtual override returns (uint256) {
        return _convertToShares(assets, MathUpgradeable.Rounding.Down);
    }

    /** @dev See {IERC4626-convertToAssets}. */
    function convertToAssets(uint256 shares) public view virtual override returns (uint256) {
        return _convertToAssets(shares, MathUpgradeable.Rounding.Down);
    }

    /** @dev See {IERC4626-maxDeposit}. */
    function maxDeposit(address) public view virtual override returns (uint256) {
        return type(uint256).max;
    }

    /** @dev See {IERC4626-maxMint}. */
    function maxMint(address) public view virtual override returns (uint256) {
        return type(uint256).max;
    }

    /** @dev See {IERC4626-maxWithdraw}. */
    function maxWithdraw(address owner) public view virtual override returns (uint256) {
        return _convertToAssets(balanceOf(owner), MathUpgradeable.Rounding.Down);
    }

    /** @dev See {IERC4626-maxRedeem}. */
    function maxRedeem(address owner) public view virtual override returns (uint256) {
        return balanceOf(owner);
    }

    /** @dev See {IERC4626-previewDeposit}. */
    function previewDeposit(uint256 assets) public view virtual override returns (uint256) {
        return _convertToShares(assets, MathUpgradeable.Rounding.Down);
    }

    /** @dev See {IERC4626-previewMint}. */
    function previewMint(uint256 shares) public view virtual override returns (uint256) {
        return _convertToAssets(shares, MathUpgradeable.Rounding.Up);
    }

    /** @dev See {IERC4626-previewWithdraw}. */
    function previewWithdraw(uint256 assets) public view virtual override returns (uint256) {
        return _convertToShares(assets, MathUpgradeable.Rounding.Up);
    }

    /** @dev See {IERC4626-previewRedeem}. */
    function previewRedeem(uint256 shares) public view virtual override returns (uint256) {
        return _convertToAssets(shares, MathUpgradeable.Rounding.Down);
    }

    /** @dev See {IERC4626-deposit}. */
    function deposit(uint256 assets, address receiver) public virtual override returns (uint256) {
        require(assets <= maxDeposit(receiver), "ERC4626: deposit more than max");

        uint256 shares = previewDeposit(assets);
        _deposit(_msgSender(), receiver, assets, shares);

        return shares;
    }

    /** @dev See {IERC4626-mint}.
     *
     * As opposed to {deposit}, minting is allowed even if the vault is in a state where the price of a share is zero.
     * In this case, the shares will be minted without requiring any assets to be deposited.
     */
    function mint(uint256 shares, address receiver) public virtual override returns (uint256) {
        require(shares <= maxMint(receiver), "ERC4626: mint more than max");

        uint256 assets = previewMint(shares);
        _deposit(_msgSender(), receiver, assets, shares);

        return assets;
    }

    /** @dev See {IERC4626-withdraw}. */
    function withdraw(uint256 assets, address receiver, address owner) public virtual override returns (uint256) {
        require(assets <= maxWithdraw(owner), "ERC4626: withdraw more than max");

        uint256 shares = previewWithdraw(assets);
        _withdraw(_msgSender(), receiver, owner, assets, shares);

        return shares;
    }

    /** @dev See {IERC4626-redeem}. */
    function redeem(uint256 shares, address receiver, address owner) public virtual override returns (uint256) {
        require(shares <= maxRedeem(owner), "ERC4626: redeem more than max");

        uint256 assets = previewRedeem(shares);
        _withdraw(_msgSender(), receiver, owner, assets, shares);

        return assets;
    }

    /**
     * @dev Internal conversion function (from assets to shares) with support for rounding direction.
     */
    function _convertToShares(uint256 assets, MathUpgradeable.Rounding rounding) internal view virtual returns (uint256) {
        return assets.mulDiv(totalSupply() + 10 ** _decimalsOffset(), totalAssets() + 1, rounding);
    }

    /**
     * @dev Internal conversion function (from shares to assets) with support for rounding direction.
     */
    function _convertToAssets(uint256 shares, MathUpgradeable.Rounding rounding) internal view virtual returns (uint256) {
        return shares.mulDiv(totalAssets() + 1, totalSupply() + 10 ** _decimalsOffset(), rounding);
    }

    /**
     * @dev Deposit/mint common workflow.
     */
    function _deposit(address caller, address receiver, uint256 assets, uint256 shares) internal virtual {
        // If _asset is ERC777, `transferFrom` can trigger a reentrancy BEFORE the transfer happens through the
        // `tokensToSend` hook. On the other hand, the `tokenReceived` hook, that is triggered after the transfer,
        // calls the vault, which is assumed not malicious.
        //
        // Conclusion: we need to do the transfer before we mint so that any reentrancy would happen before the
        // assets are transferred and before the shares are minted, which is a valid state.
        // slither-disable-next-line reentrancy-no-eth
        SafeERC20Upgradeable.safeTransferFrom(_asset, caller, address(this), assets);
        _mint(receiver, shares);

        emit Deposit(caller, receiver, assets, shares);
    }

    /**
     * @dev Withdraw/redeem common workflow.
     */
    function _withdraw(
        address caller,
        address receiver,
        address owner,
        uint256 assets,
        uint256 shares
    ) internal virtual {
        if (caller != owner) {
            _spendAllowance(owner, caller, shares);
        }

        // If _asset is ERC777, `transfer` can trigger a reentrancy AFTER the transfer happens through the
        // `tokensReceived` hook. On the other hand, the `tokensToSend` hook, that is triggered before the transfer,
        // calls the vault, which is assumed not malicious.
        //
        // Conclusion: we need to do the transfer after the burn so that any reentrancy would happen after the
        // shares are burned and after the assets are transferred, which is a valid state.
        _burn(owner, shares);
        SafeERC20Upgradeable.safeTransfer(_asset, receiver, assets);

        emit Withdraw(caller, receiver, owner, assets, shares);
    }

    function _decimalsOffset() internal view virtual returns (uint8) {
        return 0;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/token/ERC20/utils/SafeERC20Upgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../extensions/IERC20PermitUpgradeable.sol";
import "../../../utils/AddressUpgradeable.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    /**
     * @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(IERC20Upgradeable token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, 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(IERC20Upgradeable token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @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.
     */
    function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

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

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20PermitUpgradeable token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

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

    /**
     * @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 silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && AddressUpgradeable.isContract(address(token));
    }
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/access/OwnableUpgradeable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @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 {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _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);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
"
    },
    "lib/openzeppelin-contracts-upgradeable/contracts/proxy/utils/Initializable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implem