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// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

import {ERC20} from "solmate/src/tokens/ERC20.sol";
import {SafeTransferLib} from "solmate/src/utils/SafeTransferLib.sol";
import {FixedPointMathLib} from "solmate/src/utils/FixedPointMathLib.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";

import {AffineVault} from "src/vaults/AffineVault.sol";
import {AccessStrategy} from "src/strategies/AccessStrategy.sol";
import {ICurvePool, I3CrvMetaPoolZap} from "src/interfaces/curve.sol";
import {IConvexBooster, IConvexRewards} from "src/interfaces/convex.sol";
import {ISwapRouter} from "@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol";

contract ConvexStrategy is AccessStrategy {
    using SafeTransferLib for ERC20;
    using FixedPointMathLib for uint256;

    /// @notice Index assigned to `asset` by curve. Used during deposit/withdraw.
    int128 public immutable assetIndex;
    /// @notice The `asset`'s decimals.
    uint8 immutable assetDecimals;

    constructor(
        AffineVault _vault,
        int128 _assetIndex,
        bool _isMetaPool,
        ICurvePool _curvePool,
        I3CrvMetaPoolZap _zapper,
        uint256 _convexPid,
        address[] memory strategists
    ) AccessStrategy(_vault, strategists) {
        assetIndex = _assetIndex;
        assetDecimals = ERC20(_vault.asset()).decimals();
        isMetaPool = _isMetaPool;
        curvePool = _curvePool;
        zapper = _zapper;
        convexPid = _convexPid;
        if (isMetaPool) require(address(zapper) != address(0), "Zapper required");

        IConvexBooster.PoolInfo memory poolInfo = CVX_BOOSTER.poolInfo(convexPid);
        cvxRewarder = IConvexRewards(poolInfo.crvRewards);
        curveLpToken = ERC20(poolInfo.lptoken);

        // Curve Approvals (minting/burning lp tokens)
        if (isMetaPool) {
            asset.safeApprove(address(zapper), type(uint256).max);
            curveLpToken.safeApprove(address(zapper), type(uint256).max);
        } else {
            asset.safeApprove(address(curvePool), type(uint256).max);
        }

        // Convex Approvals
        curveLpToken.safeApprove(address(CVX_BOOSTER), type(uint256).max);

        // For trading CVX and CRV
        CRV.safeApprove(address(ROUTER), type(uint256).max);
        CVX.safeApprove(address(ROUTER), type(uint256).max);
    }

    /*//////////////////////////////////////////////////////////////
                                DEPOSITS
    //////////////////////////////////////////////////////////////*/

    /// @notice The curve pool, e.g. FRAX/USDC. Stableswap pool addresses are different from their lp token addresses.
    /// @dev https://curve.readthedocs.io/exchange-deposits.html#curve-stableswap-exchange-deposit-contracts
    ICurvePool public immutable curvePool;
    /// @notice The lp token received upon deposit into the pool.
    ERC20 public immutable curveLpToken;
    /// @notice If true, use the zapper for deposits/withdrawals E.g. for MIM/3CRV this would be true.
    bool immutable isMetaPool;
    /// @notice Allows users to deposit underlying tokens to metapool, e.g. USDC to MIM/3CRV.
    /// @dev See https://curve.readthedocs.io/exchange-deposits.html#metapool-deposits
    I3CrvMetaPoolZap public immutable zapper;

    /// @notice Id of the curve pool (used by convex booster).
    uint256 public immutable convexPid;
    /// @notice Convex booster. Used for depositing curve lp tokens.
    IConvexBooster public constant CVX_BOOSTER = IConvexBooster(0xF403C135812408BFbE8713b5A23a04b3D48AAE31);

    /// @notice Deposit `assets` and receive at least `minLpTokens` of CRV lp tokens. Also stake lp tokens in Convex.
    function deposit(uint256 assets, uint256 minLpTokens) external onlyRole(STRATEGIST_ROLE) {
        _depositIntoCurve(assets, minLpTokens);
        _depositIntoConvex();
    }

    /// @dev Deposits into curve using metapool if necessary.
    function _depositIntoCurve(uint256 assets, uint256 minLpTokens) internal {
        // E.g. in a FRAX-USDC stableswap pool, the 0 index is for FRAX and the index 1 is for USDC.
        if (isMetaPool) {
            uint256[4] memory depositAmounts = [uint256(0), 0, 0, 0];
            depositAmounts[uint256(uint128(assetIndex))] = assets;
            zapper.add_liquidity({pool: address(curvePool), depositAmounts: depositAmounts, minMintAmount: minLpTokens});
        } else {
            uint256[2] memory depositAmounts = [uint256(0), 0];
            depositAmounts[uint256(uint128(assetIndex))] = assets;
            curvePool.add_liquidity({depositAmounts: depositAmounts, minMintAmount: minLpTokens});
        }
    }

    function _depositIntoConvex() internal {
        CVX_BOOSTER.depositAll(convexPid, true);
    }

    /// @notice Deposit assets into curve without staking in convex.
    function depositIntoCurve(uint256 assets, uint256 minLpTokens) external onlyRole(STRATEGIST_ROLE) {
        _depositIntoCurve(assets, minLpTokens);
    }

    /// @notice Deposit curve lp tokens into convex.
    function depositIntoConvex() external onlyRole(STRATEGIST_ROLE) {
        _depositIntoConvex();
    }

    /// @dev Divestment. Unstake from convex and convert curve lp tokens into `asset`.
    function _divest(uint256 assets) internal override returns (uint256) {
        _withdraw(assets);

        uint256 amountToSend = Math.min(asset.balanceOf(address(this)), assets);
        asset.safeTransfer(address(vault), amountToSend);
        return amountToSend;
    }

    /*//////////////////////////////////////////////////////////////
                              WITHDRAWALS
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice The minimum amount of lp tokens to count towards tvl or be liquidated during withdrawals.
     * @dev `calc_withdraw_one_coin` and `remove_liquidity_one_coin` may fail when using amounts smaller than this.
     */
    uint256 constant MIN_LP_AMOUNT = 100;

    /**
     * @notice Withdraw from CRV + convex and try to increase balance of `asset` to `assets`.
     * @dev Useful in the case that we want to do multiple withdrawals ahead of a big divestment from the vault. Doing the
     * withdrawals manually (in chunks) will give us less slippage
     */
    function withdrawAssets(uint256 assets) external onlyRole(STRATEGIST_ROLE) {
        _withdraw(assets);
    }

    /// @dev Try to increase balance of `asset` to `assets`.
    function _withdraw(uint256 assets) internal {
        uint256 currAssets = asset.balanceOf(address(this));
        if (currAssets >= assets) return;

        // price * (num of lp tokens) = dollars
        uint256 currLpBal = curveLpToken.balanceOf(address(this));
        uint256 lpTokenBal = currLpBal + cvxRewarder.balanceOf(address(this));
        uint256 price = curvePool.get_virtual_price(); // 18 decimals
        uint256 dollarsOfLp = lpTokenBal.mulWadDown(price);

        // Get the amount of dollars to remove from vault, and the equivalent amount of lp token.
        // We assume that the  vault `asset` is $1.00 (e.g. we assume that USDC is 1.00). Convert to 18 decimals.
        uint256 dollarsOfAssetsToDivest = Math.min(_giveDecimals(assets - currAssets, assetDecimals, 18), dollarsOfLp);
        uint256 lpTokensToDivest = dollarsOfAssetsToDivest.divWadDown(price);

        // Minimum amount of dollars received is 99% of dollar value of lp shares (trading fees, slippage)
        // Convert back to `asset` decimals.
        uint256 minAssetsReceived = _giveDecimals(dollarsOfAssetsToDivest.mulDivDown(99, 100), 18, assetDecimals);
        // Increase the cap on lp tokens by 1% to account for curve's trading fees
        uint256 maxLpTokensToBurn = Math.min(lpTokenBal, lpTokensToDivest.mulDivDown(101, 100));

        // Withdraw from convex if needed to get correct amount of curve lp tokens
        if (maxLpTokensToBurn > currLpBal) _withdrawFromConvex(maxLpTokensToBurn - currLpBal);

        _withdrawFromCurve(maxLpTokensToBurn, minAssetsReceived);
    }

    /// @dev Withdraw from curve burning at most `maxLpTokensToBurn` and receiving at least `minAssetsReceived` assets.
    function _withdrawFromCurve(uint256 maxLpTokensToBurn, uint256 minAssetsReceived) internal {
        if (maxLpTokensToBurn < MIN_LP_AMOUNT) return;

        if (isMetaPool) {
            zapper.remove_liquidity_one_coin({
                pool: address(curvePool),
                burnAmount: maxLpTokensToBurn,
                index: assetIndex,
                minAmount: minAssetsReceived
            });
        } else {
            curvePool.remove_liquidity_one_coin(curveLpToken.balanceOf(address(this)), assetIndex, minAssetsReceived);
        }
    }

    function _withdrawFromConvex(uint256 numLpTokens) internal {
        cvxRewarder.withdrawAndUnwrap({amount: numLpTokens, claim: true});
    }

    function withdrawFromCurve(uint256 maxLpTokensToBurn, uint256 minAssetsReceived)
        external
        onlyRole(STRATEGIST_ROLE)
    {
        _withdrawFromCurve(maxLpTokensToBurn, minAssetsReceived);
    }

    function withdrawFromConvex(uint256 numLpTokens) external onlyRole(STRATEGIST_ROLE) {
        _withdrawFromConvex(numLpTokens);
    }

    /// @dev Convert between different decimal representations
    function _giveDecimals(uint256 number, uint256 inDecimals, uint256 outDecimals) internal pure returns (uint256) {
        if (inDecimals > outDecimals) {
            number = number / (10 ** (inDecimals - outDecimals));
        }
        if (inDecimals < outDecimals) {
            number = number * (10 ** (outDecimals - inDecimals));
        }
        return number;
    }

    /*//////////////////////////////////////////////////////////////
                                REWARDS
    //////////////////////////////////////////////////////////////*/

    /// @notice BaseRewardPool. Used for claiming rewards (cvx and crv).
    IConvexRewards public immutable cvxRewarder;

    /// @notice The UniswapV2 router used for trades.
    ISwapRouter public constant ROUTER = ISwapRouter(0xE592427A0AEce92De3Edee1F18E0157C05861564);
    /// @notice The CRV token. Given as a reward for deposits into convex contracts.
    ERC20 public constant CRV = ERC20(0xD533a949740bb3306d119CC777fa900bA034cd52);
    /// @notice The CVX token. Given as a reward for deposits into convex contracts.
    ERC20 public constant CVX = ERC20(0x4e3FBD56CD56c3e72c1403e103b45Db9da5B9D2B);
    /// @notice All trades are made with WETH as the middle asset, e.g. CRV => WETH => USDC.
    address constant WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    /// @notice We won't sell any CRV or CVX unless we have 0.01 of them.
    uint256 constant MIN_REWARD_AMOUNT = 0.01e18;

    /// @notice Claim convex rewards.
    function claimRewards() external onlyRole(STRATEGIST_ROLE) {
        _claimRewards();
    }

    function _claimRewards() internal {
        cvxRewarder.getReward();
    }

    /// @notice Sell rewards.
    function sellRewards(uint256 minAssetsFromCrv, uint256 minAssetsFromCvx) external onlyRole(STRATEGIST_ROLE) {
        _sellRewards(minAssetsFromCrv, minAssetsFromCvx);
    }

    function _sellRewards(uint256 minAssetsFromCrv, uint256 minAssetsFromCvx) internal {
        // Sell CRV rewards if we have at least MIN_REWARD_AMOUNT tokens
        uint256 crvBal = CRV.balanceOf(address(this));
        uint24 bps100 = 10_000;
        uint24 bps5 = 500;
        if (crvBal > MIN_REWARD_AMOUNT) {
            ISwapRouter.ExactInputSingleParams memory paramsCrv = ISwapRouter.ExactInputSingleParams({
                tokenIn: address(CRV),
                tokenOut: address(asset),
                fee: bps100,
                recipient: address(this),
                deadline: block.timestamp,
                amountIn: crvBal,
                amountOutMinimum: minAssetsFromCrv,
                sqrtPriceLimitX96: 0
            });
            ROUTER.exactInputSingle(paramsCrv);
        }

        // Sell CVX rewards
        uint256 cvxBal = CVX.balanceOf(address(this));
        if (cvxBal > MIN_REWARD_AMOUNT) {
            ISwapRouter.ExactInputParams memory paramsCvx = ISwapRouter.ExactInputParams({
                path: abi.encodePacked(address(CVX), bps100, address(WETH), bps5, address(asset)),
                recipient: address(this),
                deadline: block.timestamp,
                amountIn: cvxBal,
                amountOutMinimum: minAssetsFromCvx
            });
            ROUTER.exactInput(paramsCvx);
        }
    }

    /// @notice Claim convex rewards and sell them for `asset`.
    function claimAndSellRewards(uint256 minAssetsFromCrv, uint256 minAssetsFromCvx)
        external
        onlyRole(STRATEGIST_ROLE)
    {
        _claimRewards();
        _sellRewards(minAssetsFromCrv, minAssetsFromCvx);
    }

    /// @notice Amount of CRV to be gained during next claim.
    /// @dev The amount of CVX to be gained can be calculated off chain: https://docs.convexfinance.com/convexfinanceintegration/cvx-minting
    function pendingRewards() external view returns (uint256 pendingCrv) {
        pendingCrv = cvxRewarder.earned(address(this));
    }

    /*//////////////////////////////////////////////////////////////
                                  TVL
    //////////////////////////////////////////////////////////////*/

    function totalLockedValue() external override returns (uint256) {
        uint256 lpTokenBal = curveLpToken.balanceOf(address(this)) + cvxRewarder.balanceOf(address(this));
        uint256 assetsLp;
        if (lpTokenBal < MIN_LP_AMOUNT) return balanceOfAsset();

        if (isMetaPool) {
            assetsLp =
                zapper.calc_withdraw_one_coin({pool: address(curvePool), tokenAmount: lpTokenBal, index: assetIndex});
        } else {
            assetsLp = curvePool.calc_withdraw_one_coin(lpTokenBal, assetIndex);
        }
        return balanceOfAsset() + assetsLp;
    }

    /*//////////////////////////////////////////////////////////////
                                UPGRADES
    //////////////////////////////////////////////////////////////*/
    function sendAllTokens(address newStrategy) external onlyRole(DEFAULT_ADMIN_ROLE) {
        // Withdraw from convex
        uint256 stakedBal = cvxRewarder.balanceOf(address(this));
        if (stakedBal > 0) {
            _withdrawFromConvex(stakedBal);
        }

        // Send `asset`, curve lp, cvx, crv tokens to the new address
        _sweepToken(asset, newStrategy);
        _sweepToken(curveLpToken, newStrategy);
        _sweepToken(CRV, newStrategy);
        _sweepToken(CVX, newStrategy);
    }

    function _sweepToken(ERC20 token, address to) internal {
        uint256 bal = token.balanceOf(address(this));
        if (bal == 0) return;
        token.safeTransfer(to, bal);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControl is Context, IAccessControl, ERC165 {
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        Strings.toHexString(uint160(account), 20),
                        " is missing role ",
                        Strings.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. It the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`.
        // We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`.
        // This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`.
        // Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a
        // good first aproximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1;
        uint256 x = a;
        if (x >> 128 > 0) {
            x >>= 128;
            result <<= 64;
        }
        if (x >> 64 > 0) {
            x >>= 64;
            result <<= 32;
        }
        if (x >> 32 > 0) {
            x >>= 32;
            result <<= 16;
        }
        if (x >> 16 > 0) {
            x >>= 16;
            result <<= 8;
        }
        if (x >> 8 > 0) {
            x >>= 8;
            result <<= 4;
        }
        if (x >> 4 > 0) {
            x >>= 4;
            result <<= 2;
        }
        if (x >> 2 > 0) {
            result <<= 1;
        }

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        uint256 result = sqrt(a);
        if (rounding == Rounding.Up && result * result < a) {
            result += 1;
        }
        return result;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        StringsUpgradeable.toHexString(uint160(account), 20),
                        " is missing role ",
                        StringsUpgradeable.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }

    /**
     * @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;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControlUpgradeable {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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]
 * ```
 * 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 implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

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

    /**
     * @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[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }

    /**
     * @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[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;

import '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter is IUniswapV3SwapCallback {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);

    struct ExactInputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);

    struct ExactOutputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
    /*//////////////////////////////////////////////////////////////
                    SIMPLIFIED FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
    }

    function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
    }

    function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
    }

    /*//////////////////////////////////////////////////////////////
                    LOW LEVEL FIXED POINT OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // Divide z by the denominator.
            z := div(z, denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // First, divide z - 1 by the denominator and add 1.
            // We allow z - 1 to underflow if z is 0, because we multiply the
            // end result by 0 if z is zero, ensuring we return 0 if z is zero.
            z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))
        }
    }

    function rpow(
        uint256 x,
        uint256 n,
        uint256 scalar
    ) internal pure returns (uint256 z) {
        assembly {
            switch x
            case 0 {
                switch n
                case 0 {
                    // 0 ** 0 = 1
                    z := scalar
                }
                default {
                    // 0 ** n = 0
                    z := 0
                }
            }
            default {
                switch mod(n, 2)
                case 0 {
                    // If n is even, store scalar in z for now.
                    z := scalar
                }
                default {
                    // If n is odd, store x in z for now.
                    z := x
                }

                // Shifting right by 1 is like dividing by 2.
                let half := shr(1, scalar)

                for {
                    // Shift n right by 1 before looping to halve it.
                    n := shr(1, n)
                } n {
                    // Shift n right by 1 each iteration to halve it.
                    n := shr(1, n)
                } {
                    // Revert immediately if x ** 2 would overflow.
                    // Equivalent to iszero(eq(div(xx, x), x)) here.
                    if shr(128, x) {
                        revert(0, 0)
                    }

                    // Store x squared.
                    let xx := mul(x, x)

                    // Round to the nearest number.
                    let xxRound := add(xx, half)

                    // Revert if xx + half overflowed.
                    if lt(xxRound, xx) {
                        revert(0, 0)
                    }

                    // Set x to scaled xxRound.
                    x := div(xxRound, scalar)

                    // If n is even:
                    if mod(n, 2) {
                        // Compute z * x.
                        let zx := mul(z, x)

                        // If z * x overflowed:
                        if iszero(eq(div(zx, x), z)) {
                            // Revert if x is non-zero.
                            if iszero(iszero(x)) {
                                revert(0, 0)
                            }
                        }

                        // Round to the nearest number.
                        let zxRound := add(zx, half)

                        // Revert if zx + half overflowed.
                        if lt(zxRound, zx) {
                            revert(0, 0)
                        }

                        // Return properly scaled zxRound.
                        z := div(zxRound, scalar)
                    }
                }
            }
        }
    }

    /*//////////////////////////////////////////////////////////////
                        GENERAL NUMBER UTILITIES
    //////////////////////////////////////////////////////////////*/

    function sqrt(uint256 x) internal pure returns (uint256 z) {
        assembly {
            // Start off with z at 1.
            z := 1

            // Used below to help find a nearby power of 2.
            let y := x

            // Find the lowest power of 2 that is at least sqrt(x).
            if iszero(lt(y, 0x100000000000000000000000000000000)) {
                y := shr(128, y) // Like dividing by 2 ** 128.
                z := shl(64, z) // Like multiplying by 2 ** 64.
            }
            if iszero(lt(y, 0x10000000000000000)) {
                y := shr(64, y) // Like dividing by 2 ** 64.
                z := shl(32, z) // Like multiplying by 2 ** 32.
            }
            if iszero(lt(y, 0x100000000)) {
                y := shr(32, y) // Like dividing by 2 ** 32.
                z := shl(16, z) // Like multiplying by 2 ** 16.
            }
            if iszero(lt(y, 0x10000)) {
                y := shr(16, y) // Like dividing by 2 ** 16.
                z := shl(8, z) // Like multiplying by 2 ** 8.
            }
            if iszero(lt(y, 0x100)) {
                y := shr(8, y) // Like dividing by 2 ** 8.
                z := shl(4, z) // Like multiplying by 2 ** 4.
            }
            if iszero(lt(y, 0x10)) {
                y := shr(4, y) // Like dividing by 2 ** 4.
                z := shl(2, z) // Like multiplying by 2 ** 2.
            }
            if iszero(lt(y, 0x8)) {
                // Equivalent to 2 ** z.
                z := shl(1, z)
            }

            // Shifting right by 1 is like dividing by 2.
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))
            z := shr(1, add(z, div(x, z)))

            // Compute a rounded down version of z.
            let zRoundDown := div(x, z)

            // If zRoundDown is smaller, use it.
            if lt(zRoundDown, z) {
                z := zRoundDown
            }
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

// See https://docs.convexfinance.com/convexfinanceintegration/booster

interface IConvexBooster {
    struct PoolInfo {
        address lptoken;
        address token;
        address gauge;
        address crvRewards;
        address stash;
        bool shutdown;
    }

    function poolLength() external returns (uint256);
    function poolInfo(uint256 _pid) external returns (PoolInfo memory);
    function depositAll(uint256 _pid, bool _stake) external returns (bool);
    function crv() external returns (address);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

// See https://docs.convexfinance.com/convexfinanceintegration/baserewardpool
interface IConvexRewards {
    // get balance of an address
    function balanceOf(address _account) external returns (uint256);
    //withdraw to a convex tokenized deposit
    function withdraw(uint256 _amount, bool _claim) external returns (bool);
    //withdraw directly to curve LP token
    function withdrawAndUnwrap(uint256 amount, bool claim) external returns (bool);
    // Withdraw to curve LP token while also claiming any rewards
    function withdrawAllAndUnwrap(bool claim) external;
    // claim rewards
    function getReward() external returns (bool);
    //stake a convex tokenized deposit
    function stake(uint256 _amount) external returns (bool);
    //stake a convex tokenized deposit for another address(transferring ownership)
    function stakeFor(address _account, uint256 _amount) external returns (bool);

    // Get amount of pending CRV rewards
    function earned(address account) external view returns (uint256);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

import {IConvexBooster} from "./convex/IConvexBooster.sol";
import {IConvexRewards} from "./convex/IConvexRewards.sol";

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

// See https://curve.readthedocs.io/exchange-deposits.html#curve-stableswap-exchange-deposit-contracts
/*  solhint-disable func-name-mixedcase, var-name-mixedcase */
interface ICurvePool {
    function lp_token() external view returns (address);

    function add_liquidity(uint256[2] memory depositAmounts, uint256 minMintAmount) external returns (uint256);

    function remove_liquidity_one_coin(uint256 _burn_amount, int128 i, uint256 _min_amount)
        external
        returns (uint256);

    function remove_liquidity_imbalance(uint256[2] memory _amounts, uint256 _max_burn_amount)
        external
        returns (uint256);

    function calc_withdraw_one_coin(uint256 _token_amount, int128 i) external view returns (uint256);
    function get_virtual_price() external view returns (uint256);
}
/*  solhint-disable func-name-mixedcase, var-name-mixedcase */

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

// See https://etherscan.io/address/0xd8b712d29381748dB89c36BCa0138d7c75866ddF#code
/*  solhint-disable func-name-mixedcase, var-name-mixedcase */
interface ILiquidityGauge {
    function deposit(uint256 _value) external;
    function withdraw(uint256 _value) external returns (uint256);
    function balanceOf(address owner) external returns (uint256);

    // Get claimable CRV
    function claimable_tokens(address addr) external returns (uint256);
    function claim_rewards() external;

    // NOTE: The below only applies to non-CRV rewards
    // claimable_reward - claimed_reward = pending rewards
    // Total rewards, claimed and unclaimed
    function claimable_reward(address addr, address token) external view returns (uint256);
    // unclaimed
    function claimed_reward(address addr, address token) external view returns (uint256);
}

/*  solhint-disable func-name-mixedcase, var-name-mixedcase */

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

// See https://etherscan.io/address/0xa79828df1850e8a3a3064576f380d90aecdd3359#code for an example
/*  solhint-disable func-name-mixedcase, var-name-mixedcase */
interface I3CrvMetaPoolZap {
    function add_liquidity(address pool, uint256[4] memory depositAmounts, uint256 minMintAmount)
        external
        returns (uint256);

    function remove_liquidity_one_coin(address pool, uint256 burnAmount, int128 index, uint256 minAmount)
        external
        returns (uint256);

    function remove_liquidity_imbalance(address _pool, uint256[4] memory _amounts, uint256 _maxBurnAmount)
        external
        returns (uint256);

    function calc_withdraw_one_coin(address pool, uint256 tokenAmount, int128 index) external view returns (uint256);
}
/*  solhint-disable func-name-mixedcase, var-name-mixedcase */

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

// See https://etherscan.io/address/0xd061D61a4d941c39E5453435B6345Dc261C2fcE0#code
/*  solhint-disable func-name-mixedcase, var-name-mixedcase */
interface IMinter {
    function mint(address gauge) external;
}

/*  solhint-disable func-name-mixedcase, var-name-mixedcase */

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

import {ICurvePool} from "./curve/ICurvePool.sol";
import {ILiquidityGauge} from "./curve/ILiquidityGauge.sol";
import {I3CrvMetaPoolZap} from "./curve/IMetaPoolZap.sol";
import {IMinter} from "./curve/IMinter.sol";

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

/*  solhint-disable func-visibility */
function uncheckedInc(uint256 i) pure returns (uint256) {
    unchecked {
        return i + 1;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

import {AccessControl} from "@openzeppelin/contracts/access/AccessControl.sol";

import {AffineVault} from "src/vaults/AffineVault.sol";
import {BaseStrategy} from "./BaseStrategy.sol";
import {uncheckedInc} from "src/libs/Unchecked.sol";

contract AccessStrategy is BaseStrategy, AccessControl {
    bytes32 public constant STRATEGIST_ROLE = keccak256("STRATEGIST");

    constructor(AffineVault _vault, address[] memory strategists) BaseStrategy(_vault) {
        // Governance is admin
        _grantRole(DEFAULT_ADMIN_ROLE, vault.governance());
        _grantRole(STRATEGIST_ROLE, vault.governance());

        // Give STRATEGIST_ROLE to every address in list
        for (uint256 i = 0; i < strategists.length; i = uncheckedInc(i)) {
            _grantRole(STRATEGIST_ROLE, strategists[i]);
        }
    }

    function totalLockedValue() external virtual override returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

import {ERC20} from "solmate/src/tokens/ERC20.sol";
import {AffineVault} from "src/vaults/AffineVault.sol";
import {SafeTransferLib} from "solmate/src/utils/SafeTransferLib.sol";
import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";

/// @notice Base strategy contract
abstract contract BaseStrategy {
    using SafeTransferLib for ERC20;

    constructor(AffineVault _vault) {
        vault = _vault;
        asset = ERC20(_vault.asset());
    }

    /// @notice The vault which will deposit/withdraw from the this contract
    AffineVault public immutable vault;

    modifier onlyVault() {
        require(msg.sender == address(vault), "BS: only vault");
        _;
    }

    modifier onlyGovernance() {
        require(msg.sender == vault.governance(), "BS: only governance");
        _;
    }

    /// @notice Returns the underlying ERC20 asset the strategy accepts.
    ERC20 public immutable asset;

    /// @notice Strategy's balance of underlying asset.
    /// @return assets Strategy's balance.
    function balanceOfAsset() public view returns (uint256 assets) {
        assets = asset.balanceOf(address(this));
    }

    /// @notice Deposit vault's underlying asset into strategy.
    /// @param amount The amount to invest.
    /// @dev This function must revert if investment fails.
    function invest(uint256 amount) external {
        asset.safeTransferFrom(msg.sender, address(this), amount);
        _afterInvest(amount);
    }

    /// @notice After getting money from the vault, do something with it.
    /// @param amount The amount received from the vault.
    /// @dev Since investment is often gas-intensive and may require off-chain data, this will often be unimplemented.
    /// @dev Strategists will call custom functions for handling deployment of capital.
    function _afterInvest(uint256 amount) internal virtual {}

    /// @notice Withdraw vault's underlying asset from strategy.
    /// @param amount The amount to withdraw.
    /// @return The amount of `asset` divested from the strategy
    function divest(uint256 amount) external onlyVault returns (uint256) {
        return _divest(amount);
    }

    /// @dev This function should not revert if we get less than `amount` out of the strategy
    function _divest(uint256 amount) internal virtual returns (uint256) {}

    /// @notice The total amount of `asset` that the strategy is managing
    /// @dev This should not overestimate, and should account for slippage during divestment
    /// @return The strategy tvl
    function totalLockedValue() external virtual returns (uint256);

    function sweep(ERC20 token) external onlyGovernance {
        token.safeTransfer(vault.governance(), token.balanceOf(address(this)));
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

contract AffineGovernable {
    /// @notice The governance address
    address public governance;

    modifier onlyGovernance() {
        _onlyGovernance();
        _;
    }

    function _onlyGovernance() internal view {
        require(msg.sender == governance, "Only Governance.");
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.16;

import {AccessControlUpgradeable} from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";

import {ERC20} from "solmate/src/tokens/ERC20.sol";
import {SafeTransferLib} from "solmate/src/utils/SafeTransferLib.sol";

import {AffineGovernable} from "src/utils/AffineGovernable.sol";
import {BaseStrategy as Strategy} from "src/strategies/BaseStrategy.sol";
import {uncheckedInc} from "src/libs/Unchecked.sol";

/**
 * @notice A core contract to be inherited by the L1 and L2 vault contracts. This contract handles adding
 * and removing strategies, investing in (and divesting from) strategies, harvesting gains/losses, and
 * strategy liquidation.
 */
contract AffineVault is AffineGovernable, AccessControlUpgradeable {
    using SafeTransferLib for ERC20;

    /*//////////////////////////////////////////////////////////////
                             INITIALIZATION
    //////////////////////////////////////////////////////////////*/

    ERC20 _asset;

    /// @notice The token that the vault takes in and tries to get more of, e.g. USDC
    function asset() public view virtual returns (address) {
        return address(_asset);
    }

    /**
     * @dev Initialize the vault.
     * @param _governance The governance address.
     * @param vaultAsset The vault's input asset.
     */
    function baseInitialize(address _governance, ERC20 vaultAsset) internal virtual {
        governance = _governance;
        _asset = vaultAsset;

        // All roles use the default admin role
        // Governance has the admin role and all roles
        _grantRole(DEFAULT_ADMIN_ROLE, governance);
        _grantRole(HARVESTER, governance);

        lastHarvest = uint128(block.timestamp);
    }

    /*//////////////////////////////////////////////////////////////
                             AUTHENTICATION
    //////////////////////////////////////////////////////////////*/

    /// @notice Role with authority to call "harvest", i.e. update this vault's tvl
    bytes32 public constant HARVESTER = keccak256("HARVESTER");

    /*//////////////////////////////////////////////////////////////
                            WITHDRAWAL QUEUE
    //////////////////////////////////////////////////////////////*/

    uint8 constant MAX_STRATEGIES = 20;

    /**
     * @notice An ordered array of strategies representing the withdrawal queue. The withdrawal queue is used
     * whenever the vault wants to pull money out of strategies.
     * @dev The first strategy in the array (index 0) is withdrawn from first.
     * This is a list of the currently active strategies  (all non-zero addresses are active).
     */
    Strategy[MAX_STRATEGIES] public withdrawalQueue;

    /**
     * @notice Gets the full withdrawal queue.
     * @return The withdrawal queue.
     * @dev This gives easy access to the whole array (by default we can only get one index at a time)
     */
    function getWithdrawalQueue() external view returns (Strategy[MAX_STRATEGIES] memory) {
        return withdrawalQueue;
    }

    /**
     * @notice Sets a new withdrawal queue.
     * @param newQueue The new withdrawal queue.
     */
    function setWithdrawalQueue(Strategy[MAX_STRATEGIES] calldata newQueue) external onlyGovernance {
        // Maintain queue size
        require(newQueue.length == MAX_STRATEGIES, "BV: bad qu size");

        // Replace the withdrawal queue.
        withdrawalQueue = newQueue;

        emit WithdrawalQueueSet(newQueue);
    }

    /**
     * @notice Emitted when the withdrawal queue is updated.
     * @param newQueue The new withdrawal queue.
     */
    event WithdrawalQueueSet(Strategy[MAX_STRATEGIES] newQueue);

    /*//////////////////////////////////////////////////////////////
                               STRATEGIES
    //////////////////////////////////////////////////////////////*/

    /// @notice The total amount of underlying assets held in strategies at the time of the last harvest.
    uint256 public totalStrategyHoldings;

    struct StrategyInfo {
        bool isActive;
        uint16 tvlBps;
        uint232 balance;
    }

    /// @notice A map of strategy addresses to details
    mapping(Strategy => StrategyInfo) public strategies;

    uint256 constant MAX_BPS = 10_000;
    /// @notice The number of bps of the vault's tvl which may be given to strategies (at most MAX_BPS)
    uint256 public totalBps;

    /// @notice Emitted when a strategy is added by governance
    event StrategyAdded(Strategy indexed strategy);
    /// @notice Emitted when a strategy is removed by governance
    event StrategyRemoved(Strategy indexed strategy);

    /**
     * @notice Add a strategy
     * @param strategy The strategy to add
     * @param tvlBps The number of bps of our tvl the strategy will get when funds are distributed to strategies
     */
    function addStrategy(Strategy strategy, uint16 tvlBps) external onlyGovernance {
        _increaseTVLBps(tvlBps);
        strategies[strategy] = StrategyInfo({isActive: true, tvlBps: tvlBps, balance: 0});
        //  Add strategy to withdrawal queue
        withdrawalQueue[MAX_STRATEGIES - 1] = strategy;
        emit StrategyAdded(strategy);
        _organizeWithdrawalQueue();
    }

    /// @notice A helper function for increasing `totalBps`. Used when adding strategies or updating strategy allocs
    function _increaseTVLBps(uint256 tvlBps) internal {
        uint256 newTotalBps = totalBps + tvlBps;
        require(newTotalBps <= MAX_BPS, "BV: too many bps");
        totalBps = newTotalBps;
    }

    /**
     * @notice Push all zero addresses to the end of the array. This function is used whenever a strategy is
     * added or removed from the withdrawal queue
     * @dev Relative ordering of non-zero values is maintained.
     */
    function _organizeWithdrawalQueue() internal {
        // number or empty values we've seen iterating from left to right
        uint256 offset;

        for (uint256 i = 0; i < MAX_STRATEGIES; i = uncheckedInc(i)) {
            Strategy strategy = withdrawalQueue[i];
            if (address(strategy) == address(0)) {
                offset += 1;
            } else if (offset > 0) {
                // index of first empty value seen takes on value of `strategy`
                withdrawalQueue[i - offset] = strategy;
                withdrawalQueue[i] = Strategy(address(0));
            }
        }
    }

    /**
     * @notice Remove a strategy from the withdrawal queue. Fully divest from the strategy.
     * @param strategy The strategy to remove
     * @dev  removeStrategy MUST be called with harvest via multicall. This helps get the most accurate tvl numbers
     * and allows us to add any realized profits to our lockedProfit
     */
    function removeStrategy(Strategy strategy) external onlyGovernance {
        for (uint256 i = 0; i < MAX_STRATEGIES; i = uncheckedInc(i)) {
            if (strategy != withdrawalQueue[i]) {
                continue;
            }

            strategies[strategy].isActive = false;

            // The vault can re-allocate bps to a new strategy
            totalBps -= strategies[strategy].tvlBps;
            strategies[strategy].tvlBps = 0;

            // Remove strategy from withdrawal queue
            withdrawalQueue[i] = Strategy(address(0));
            emit StrategyRemoved(strategy);
            _organizeWithdrawalQueue();

            // Take all money out of strategy.
            _withdrawFromStrategy(strategy, strategy.totalLockedValue());
            break;
        }
    }

    /**
     * @notice Update tvl bps assigned to the given list of strategies
     * @param strategyList The list of strategies
     * @param strategyBps The new bps
     */
    function updateStrategyAllocations(Strategy[] calldata strategyList, uint16[] calldata strategyBps)
        external
        onlyRole(HARVESTER)
    {
        for (uint256 i = 0; i < strategyList.length; i = uncheckedInc(i)) {
            // Get the strategy at the current index.
            Strategy strategy = strategyList[i];

            // Ignore inactive (removed) strategies
            if (!strategies[strategy].isActive) continue;

            // update tvl bps
            totalBps -= strategies[strategy].tvlBps;
            _increaseTVLBps(strategyBps[i]);
            strategies[strategy].tvlBps = strategyBps[i];
        }
        emit StrategyAllocsUpdated(strategyList, strategyBps);
    }

    /**
     * @notice Emitted when we update tvl bps for a list of strategies.
     * @param strategyList The list of strategies.
     * @param strategyBps The new tvl bps for the strategies
     */
    event StrategyAllocsUpdated(Strategy[] strategyList, uint16[] strategyBps);

    /*//////////////////////////////////////////////////////////////
                      STRATEGY DEPOSIT/WITHDRAWAL
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice Emitted after the Vault deposits into a strategy contract.
     * @param strategy The strategy that was deposited into.
     * @param assets The amount of assets deposited.
     */
    event StrategyDeposit(Strategy indexed strategy, uint256 assets);

    /**
     * @notice Emitted after the Vault withdraws funds from a strategy contract.
     * @param strategy The strategy that was withdrawn from.
     * @param assetsRequested The amount of assets we tried to divest from the strategy.
     * @param assetsReceived The amount of assets actually withdrawn.
     */
    event StrategyWithdrawal(Strategy indexed strategy, uint256 assetsRequested, uint256 assetsReceived);

    /// @notice Deposit `assetAmount` amount of `asset` into strategies according to each strategy's `tvlBps`.
    function _depositIntoStrategies(uint256 assetAmount) internal {
        // All non-zero strategies are active
        for (uint256 i = 0; i < MAX_STRATEGIES; i = uncheckedInc(i)) {
            Strategy strategy = withdrawalQueue[i];
            if (address(strategy) == address(0)) {
                break;
            }
            _depositIntoStrategy(strategy, (assetAmount * strategies[strategy].tvlBps) / MAX_BPS);
        }
    }

    function _depositIntoStrategy(Strategy strategy, uint256 assets) internal {
        // Don't allow empty investments
        if (assets == 0) return;

        // Increase totalStrategyHoldings to account for the deposit.
        totalStrategyHoldings += assets;

        unchecked {
            // Without this the next harvest would count the deposit as profit.
            // Cannot overflow as the balance of one strategy can't exceed the sum of all.
            strategies[strategy].balance += uint232(assets);
        }

        // Approve assets to the strategy so we can deposit.
        _asset.safeApprove(address(strategy), assets);

        // Deposit into the strategy, will revert upon failure
        strategy.invest(assets);
        emit StrategyDeposit(strategy, assets);
    }

    /**
     * @notice Withdraw a specific amount of underlying tokens from a strategy.
     * @dev This is a "best effort" withdrawal. It could potentially withdraw nothing.
     * @param strategy The strategy to withdraw from.
     * @param assets  The amount of underlying tokens to withdraw.
     * @return The amount of assets actually received.
     */
    function _withdrawFromStrategy(Strategy strategy, uint256 assets) internal returns (uint256) {
        // Withdraw from the strategy
        uint256 amountWithdrawn = _divest(strategy, assets);

        // Without this the next harvest would count the withdrawal as a loss.
        // We update the balance to the current tvl because a withdrawal can reduce the tvl by more than the amount
        // withdrawn (e.g. fees during a swap)
        uint256 oldStratTVL = strategies[strategy].balance;
        uint256 newStratTvl = strategy.totalLockedValue();
        strategies[strategy].balance = uint232(newStratTvl);

        // Decrease totalStrategyHoldings to account for the withdrawal.
        // If we haven't harvested in a long time, newStratTvl could be bigger than oldStratTvl
        totalStrategyHoldings -= oldStratTVL > newStratTvl ? oldStratTVL - newStratTvl : 0;
        emit StrategyWithdrawal({strategy: strategy, assetsRequested: assets, assetsReceived: amountWithdrawn});
        return amountWithdrawn;
    }

    /// @dev A small wrapper around divest(). We try-catch to make sure that a bad strategy does not pause withdrawals.
    function _divest(Strategy strategy, uint256 assets) internal returns (uint256) {
        try strategy.divest(assets) returns (uint256 amountDivested) {
            return amountDivested;
        } catch {
            return 0;
        }
    }

    /*//////////////////////////////////////////////////////////////
                               HARVESTING
    //////////////////////////////////////////////////////////////*/

    /**
     * @notice A timestamp representing when the most recent harvest occurred.
     * @dev Since the time since the last harvest is used to calculate management fees, this is set
     * to `block.timestamp` (instead of 0) during initialization.
     */
    uint128 public lastHarvest;
    /// @notice The amount of profit *originally* locked after harvesting from a strategy
    uint128 public maxLockedProfit;
    /// @notice Amount of time in seconds that profit takes to fully unlock. See lockedProfit().
    uint256 public constant LOCK_INTERVAL = 24 hours;

    /**
     * @notice Emitted after a successful harvest.
     * @param user The authorized user who triggered the harvest.
     * @param strategies The trusted strategies that were harvested.
     */
    event Harvest(address indexed user, Strategy[] strategies);

    /**
     * @notice Harvest a set of trusted strategies.
     * @param strategyList The trusted strategies to harvest.
     * @dev Will always revert if profit from last harvest has not finished unlocking.
     */
    function harvest(Strategy[] calldata strategyList) external onlyRole(HARVESTER) {
        // Profit must not be unlocking
        require(block.timestamp >= lastHarvest + LOCK_INTERVAL, "BV: profit unlocking");

        // Get the Vault's current total strategy holdings.
        uint256 oldTotalStrategyHoldings = totalStrategyHoldings;

        // Used to store the new total strategy holdings after harvesting.
        uint256 newTotalStrategyHoldings = oldTotalStrategyHoldings;

        // Used to store the total profit accrued by the strategies.
        uint256 totalProfitAccrued;

        // Will revert if any of the specified strategies are untrusted.
        for (uint256 i = 0; i < strategyList.length; i = uncheckedInc(i)) {
            // Get the strategy at the current index.
            Strategy strategy = strategyList[i];

            // Ignore inactive (removed) strategies
            if (!strategies[strategy].isActive) {
                continue;
            }

            // Get the strategy's previous and current balance.
            uint232 balanceLastHarvest = strategies[strategy].balance;
            uint256 balanceThisHarvest = strategy.totalLockedValue();

            // Update the strategy's stored balance.
            strategies[strategy].balance = uint232(balanceThisHarvest);

            // Increase/decrease newTotalStrategyHoldings based on the profit/loss registered.
            // We cannot wrap the subtraction in parenthesis as it would underflow if the strategy had a loss.
            newTotalStrategyHoldings = newTotalStrategyHoldings + balanceThisHarvest - balanceLastHarvest;

            unchecked {
                // Update the total profit accrued while counting losses as zero profit.
                // Cannot overflow as we already increased total holdings without reverting.
                totalProfitAccrued += balanceThisHarvest > balanceLastHarvest
                    ? balanceThisHarvest - balanceLastHarvest // Profits since last harvest.
                    : 0; // If the strategy registered a net loss we don't have any new profit.
            }
        }

        // Update max unlocked profit based on any remaining locked profit plus new profit.
        maxLockedProfit = uint128(lockedProfit() + totalProfitAccrued);

        // Set strategy holdings to our new total.
        totalStrategyHoldings = newTotalStrategyHoldings;

        // Assess fees (using old lastHarvest) and update the last harvest timestamp.
        _assessFees();
        lastHarvest = uint128(block.timestamp);

        emit Harvest(msg.sender, strategyList);
    }

    /**
     * @notice Current locked profit amount.
     * @dev Profit unlocks uniformly over `LOCK_INTERVAL` seconds after the last harvest
     */
    function lockedProfit() public view virtual returns (uint256) {
        if (block.timestamp >= lastHarvest + LOCK_INTERVAL) {
            return 0;
        }

        uint256 unlockedProfit = (maxLockedProfit * (block.timestamp - lastHarvest)) / LOCK_INTERVAL;
        return maxLockedProfit - unlockedProfit;
    }

    /*//////////////////////////////////////////////////////////////
                        LIQUIDATION/REBALANCING
    //////////////////////////////////////////////////////////////*/

    /// @notice The total amount of the underlying asset the vault has.
    function vaultTVL() public view returns (uint256) {
        return _asset.balanceOf(address(this)) + totalStrategyHoldings;
    }

    /**
     * @notice Emitted when the vault must make a certain amount of assets available
     * @dev We liquidate during cross chain rebalancing or withdrawals.
     * @param assetsRequested The amount we wanted to make available for withdrawal.
     * @param assetsLiquidated The amount we actually liquidated.
     */
    event Liquidation(uint256 assetsRequested, uint256 assetsLiquidated);

    /**
     * @notice Withdraw `amount` of underlying asset from strategies.
     * @dev Always check the return value when using this function, we might not liquidate anything!
     * @param amount The amount we want to liquidate
     * @return The amount we actually liquidated
     */
    function _liquidate(uint256 amount) internal returns (uint256) {
        uint256 amountLiquidated;
        for (uint256 i = 0; i < MAX_STRATEGIES; i = uncheckedInc(i)) {
            Strategy strategy = withdrawalQueue[i];
            if (address(strategy) == address(0)) {
                break;
            }

            uint256 balance = _asset.balanceOf(address(this));
            if (balance >= amount) {
                break;
            }

            uint256 amountNeeded = amount - balance;
            amountNeeded = Math.min(amountNeeded, strategies[strategy].balance);

            // Force withdraw of token from strategy
            uint256 withdrawn = _withdrawFromStrategy(strategy, amountNeeded);
            amountLiquidated += withdrawn;
        }
        emit Liquidation({assetsRequested: amount, assetsLiquidated: amountLiquidated});
        return amountLiquidated;
    }

    /**
     * @notice Assess fees.
     * @dev This is called during harvest() to assess management fees.
     */
    function _assessFees() internal virtual {}

    /**
     * @notice Emitted when we do a strategy rebalance, i.e. when we make the strategy tvls match their tvl bps
     * @param caller The caller
     */
    event Rebalance(address indexed caller);

    /// @notice  Rebalance strategies according to given tvl bps
    function rebalance() external onlyRole(HARVESTER) {
        uint256 tvl = vaultTVL();

        // Loop through all strategies. Divesting from those whose tvl is too high,
        // Invest in those whose tvl is too low

        // MAX_STRATEGIES is always equal to withdrawalQueue.length
        uint256[MAX_STRATEGIES] memory amountsToInvest;

        for (uint256 i = 0; i < MAX_STRATEGIES; i = uncheckedInc(i)) {
            Strategy strategy = withdrawalQueue[i];
            if (address(strategy) == address(0)) {
                break;
            }

            uint256 idealStrategyTVL = (tvl * strategies[strategy].tvlBps) / MAX_BPS;
            uint256 currStrategyTVL = strategy.totalLockedValue();
            if (idealStrategyTVL < currStrategyTVL) {
                _withdrawFromStrategy(strategy, currStrategyTVL - idealStrategyTVL);
            }
            if (idealStrategyTVL > currStrategyTVL) {
                amountsToInvest[i] = idealStrategyTVL - currStrategyTVL;
            }
        }

        // Loop through the strategies to invest in, and invest in them
        for (uint256 i = 0; i < MAX_STRATEGIES; i = uncheckedInc(i)) {
            uint256 amountToInvest = amountsToInvest[i];
            if (amountToInvest == 0) {
                continue;
            }

            // We aren't guaranteed that the vault has `amountToInvest` since there can be slippage
            // when divesting from strategies
            // NOTE: Strategies closer to the start of the queue are more likely to get the exact
            // amount of money needed
            amountToInvest = Math.min(amountToInvest, _asset.balanceOf(address(this)));
            if (amountToInvest == 0) {
                break;
            }
            // Deposit into strategy, making sure to not count this investment as a profit
            _depositIntoStrategy(withdrawalQueue[i], amountToInvest);
        }

        emit Rebalance(msg.sender);
    }
}

{
  "remappings": [
    "@opengsn/=node_modules/@opengsn/",
    "@openzeppelin/=node_modules/@openzeppelin/",
    "@uniswap/=node_modules/@uniswap/",
    "base64-sol/=node_modules/base64-sol/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "hardhat/=node_modules/hardhat/",
    "script/=script/",
    "solady/=node_modules/solady/",
    "solmate/=node_modules/solmate/",
    "src/=src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 2000000
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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-----Decoded View---------------
Arg [0] : _vault (address): 0x78Bb94Feab383ccEd39766a7d6CF31dED177Ad0c
Arg [1] : _assetIndex (int128): 2
Arg [2] : _isMetaPool (bool): True
Arg [3] : _curvePool (address): 0x5a6A4D54456819380173272A5E8E9B9904BdF41B
Arg [4] : _zapper (address): 0xA79828DF1850E8a3A3064576f380D90aECDD3359
Arg [5] : _convexPid (uint256): 40
Arg [6] : strategists (address[]): 0x47fD0834DD8b435BbbD7115bB7d3b3120dD0946d

-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 00000000000000000000000078bb94feab383cced39766a7d6cf31ded177ad0c
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [3] : 0000000000000000000000005a6a4d54456819380173272a5e8e9b9904bdf41b
Arg [4] : 000000000000000000000000a79828df1850e8a3a3064576f380d90aecdd3359
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000028
Arg [6] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [8] : 00000000000000000000000047fd0834dd8b435bbbd7115bb7d3b3120dd0946d