Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.26;

import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import { IHarvesterCallback } from "./interfaces/IHarvesterCallback.sol";

import { PermissionedSwap } from "../common/utils/PermissionedSwap.sol";
import { PegKeeper } from "../core/PegKeeper.sol";

contract ProtocolTreasury is PermissionedSwap {
  using SafeERC20 for IERC20;

  /**********
   * Errors *
   **********/

  /// @dev Thrown when the multicall fails.
  error ErrorMulticallFailed();

  /*************
   * Constants *
   *************/

  /// @notice The role for permissioned multicall.
  bytes32 public constant MULTICALL_ROLE = keccak256("MULTICALL_ROLE");

  /// @notice The role for permissioned batch transfer.
  bytes32 public constant BATCH_TRANSFER_ROLE = keccak256("BATCH_TRANSFER_ROLE");

  /// @notice The role for permissioned token receiver.
  bytes32 public constant TOKEN_RECEIVER_ROLE = keccak256("TOKEN_RECEIVER_ROLE");

  /// @notice The role for permissioned peg keeper.
  bytes32 public constant PEG_KEEPER_ROLE = keccak256("PEG_KEEPER_ROLE");

  /// @notice The role for buyback.
  bytes32 public constant BUYBACK_ROLE = keccak256("BUYBACK_ROLE");

  /// @notice The role for stabilize.
  bytes32 public constant STABILIZE_ROLE = keccak256("STABILIZE_ROLE");

  /***************
   * Constructor *
   ***************/

  function initialize(address _admin) external initializer {
    __Context_init();
    __ERC165_init();
    __AccessControl_init();

    _grantRole(DEFAULT_ADMIN_ROLE, _admin);
  }

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @notice Multicall function to call multiple functions in a single transaction.
  /// @param targets The addresses of the contracts to call.
  /// @param data The data to call the functions with.
  function multicall(address[] calldata targets, bytes[] calldata data) external onlyRole(MULTICALL_ROLE) {
    for (uint256 i = 0; i < targets.length; i++) {
      (bool success, ) = targets[i].call(data[i]);
      if (!success) revert ErrorMulticallFailed();
    }
  }

  /// @notice Batch transfer tokens to the receiver.
  /// @param token The address of the token to transfer.
  /// @param receivers The addresses of the receivers to transfer.
  /// @param amounts The amounts of the tokens to transfer.
  function batchTransfer(
    address token,
    address[] calldata receivers,
    uint256[] calldata amounts
  ) external onlyRole(BATCH_TRANSFER_ROLE) {
    for (uint256 i = 0; i < receivers.length; i++) {
      _checkRole(TOKEN_RECEIVER_ROLE, receivers[i]);
      IERC20(token).safeTransfer(receivers[i], amounts[i]);
    }
  }

  /// @notice Buyback fxUSD with stable reserve in FxUSDSave.
  /// @param pegKeeper The address of peg keeper.
  /// @param amountIn The amount of stable token to use.
  /// @param data The hook data to `onSwap`.
  /// @return amountOut The amount of fxUSD swapped.
  /// @return bonus The amount of bonus fxUSD.
  function buyback(
    address pegKeeper,
    uint256 amountIn,
    bytes calldata data
  ) external onlyRole(BUYBACK_ROLE) returns (uint256 amountOut, uint256 bonus) {
    (amountOut, bonus) = PegKeeper(pegKeeper).buyback(amountIn, data);
  }

  /// @notice Stabilize the fxUSD price in curve pool.
  /// @param pegKeeper The address of peg keeper.
  /// @param srcToken The address of source token (fxUSD or stable token).
  /// @param amountIn The amount of source token to use.
  /// @param data The hook data to `onSwap`.
  /// @return amountOut The amount of target token swapped.
  /// @return bonus The amount of bonus token.
  function stabilize(
    address pegKeeper,
    address srcToken,
    uint256 amountIn,
    bytes calldata data
  ) external onlyRole(STABILIZE_ROLE) returns (uint256 amountOut, uint256 bonus) {
    (amountOut, bonus) = PegKeeper(pegKeeper).stabilize(srcToken, amountIn, data);
  }
}

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

pragma solidity ^0.8.20;

import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol";
import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {ERC165Upgradeable} from "../utils/introspection/ERC165Upgradeable.sol";
import {Initializable} from "../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:
 *
 * ```solidity
 * 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}:
 *
 * ```solidity
 * 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. We recommend using {AccessControlDefaultAdminRules}
 * to enforce additional security measures for this role.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControl, ERC165Upgradeable {
    struct RoleData {
        mapping(address account => bool) hasRole;
        bytes32 adminRole;
    }

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;


    /// @custom:storage-location erc7201:openzeppelin.storage.AccessControl
    struct AccessControlStorage {
        mapping(bytes32 role => RoleData) _roles;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.AccessControl")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant AccessControlStorageLocation = 0x02dd7bc7dec4dceedda775e58dd541e08a116c6c53815c0bd028192f7b626800;

    function _getAccessControlStorage() private pure returns (AccessControlStorage storage $) {
        assembly {
            $.slot := AccessControlStorageLocation
        }
    }

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with an {AccessControlUnauthorizedAccount} error including the required role.
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    /// @inheritdoc IERC165
    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 returns (bool) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        return $._roles[role].hasRole[account];
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `_msgSender()`
     * is missing `role`. Overriding this function changes the behavior of the {onlyRole} modifier.
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Reverts with an {AccessControlUnauthorizedAccount} error if `account`
     * is missing `role`.
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert AccessControlUnauthorizedAccount(account, role);
        }
    }

    /**
     * @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 returns (bytes32) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        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 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 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 `callerConfirmation`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address callerConfirmation) public virtual {
        if (callerConfirmation != _msgSender()) {
            revert AccessControlBadConfirmation();
        }

        _revokeRole(role, callerConfirmation);
    }

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

    /**
     * @dev Attempts to grant `role` to `account` and returns a boolean indicating if `role` was granted.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual returns (bool) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        if (!hasRole(role, account)) {
            $._roles[role].hasRole[account] = true;
            emit RoleGranted(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Attempts to revoke `role` from `account` and returns a boolean indicating if `role` was revoked.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual returns (bool) {
        AccessControlStorage storage $ = _getAccessControlStorage();
        if (hasRole(role, account)) {
            $._roles[role].hasRole[account] = false;
            emit RoleRevoked(role, account, _msgSender());
            return true;
        } else {
            return false;
        }
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```solidity
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 *
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the 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 Storage of the initializable contract.
     *
     * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
     * when using with upgradeable contracts.
     *
     * @custom:storage-location erc7201:openzeppelin.storage.Initializable
     */
    struct InitializableStorage {
        /**
         * @dev Indicates that the contract has been initialized.
         */
        uint64 _initialized;
        /**
         * @dev Indicates that the contract is in the process of being initialized.
         */
        bool _initializing;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;

    /**
     * @dev The contract is already initialized.
     */
    error InvalidInitialization();

    /**
     * @dev The contract is not initializing.
     */
    error NotInitializing();

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint64 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.
     *
     * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
     * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
     * production.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        // Cache values to avoid duplicated sloads
        bool isTopLevelCall = !$._initializing;
        uint64 initialized = $._initialized;

        // Allowed calls:
        // - initialSetup: the contract is not in the initializing state and no previous version was
        //                 initialized
        // - construction: the contract is initialized at version 1 (no reinitialization) and the
        //                 current contract is just being deployed
        bool initialSetup = initialized == 0 && isTopLevelCall;
        bool construction = initialized == 1 && address(this).code.length == 0;

        if (!initialSetup && !construction) {
            revert InvalidInitialization();
        }
        $._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.
     *
     * 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.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * 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.
     *
     * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint64 version) {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing || $._initialized >= version) {
            revert InvalidInitialization();
        }
        $._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() {
        _checkInitializing();
        _;
    }

    /**
     * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
     */
    function _checkInitializing() internal view virtual {
        if (!_isInitializing()) {
            revert NotInitializing();
        }
    }

    /**
     * @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.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        // solhint-disable-next-line var-name-mixedcase
        InitializableStorage storage $ = _getInitializableStorage();

        if ($._initializing) {
            revert InvalidInitialization();
        }
        if ($._initialized != type(uint64).max) {
            $._initialized = type(uint64).max;
            emit Initialized(type(uint64).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint64) {
        return _getInitializableStorage()._initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _getInitializableStorage()._initializing;
    }

    /**
     * @dev Pointer to storage slot. Allows integrators to override it with a custom storage location.
     *
     * NOTE: Consider following the ERC-7201 formula to derive storage locations.
     */
    function _initializableStorageSlot() internal pure virtual returns (bytes32) {
        return INITIALIZABLE_STORAGE;
    }

    /**
     * @dev Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        bytes32 slot = _initializableStorageSlot();
        assembly {
            $.slot := slot
        }
    }
}

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

pragma solidity ^0.8.20;
import {Initializable} from "../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;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import {Initializable} from "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC-165 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);
 * }
 * ```
 */
abstract contract ERC165Upgradeable is Initializable, IERC165 {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /// @inheritdoc IERC165
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

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

pragma solidity >=0.8.4;

/**
 * @dev External interface of AccessControl declared to support ERC-165 detection.
 */
interface IAccessControl {
    /**
     * @dev The `account` is missing a role.
     */
    error AccessControlUnauthorizedAccount(address account, bytes32 neededRole);

    /**
     * @dev The caller of a function is not the expected one.
     *
     * NOTE: Don't confuse with {AccessControlUnauthorizedAccount}.
     */
    error AccessControlBadConfirmation();

    /**
     * @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 to signal this.
     */
    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. This account bears the admin role (for the granted role).
     * Expected in cases where the role was granted using the internal {AccessControl-_grantRole}.
     */
    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 `callerConfirmation`.
     */
    function renounceRole(bytes32 role, address callerConfirmation) external;
}

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

pragma solidity >=0.6.2;

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

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

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

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

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

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

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

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

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

pragma solidity >=0.4.16;

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

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

pragma solidity >=0.4.16;

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

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

pragma solidity >=0.4.16;

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity >=0.4.16;

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

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import { AccessControlUpgradeable } from "@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

// solhint-disable avoid-low-level-calls
// solhint-disable no-inline-assembly

abstract contract PermissionedSwap is AccessControlUpgradeable {
  using SafeERC20 for IERC20;

  /**********
   * Errors *
   **********/

  /// @dev Thrown when the amount of output token is not enough.
  error InsufficientOutputToken();

  /*************
   * Constants *
   *************/

  /// @notice The role for permissioned trader.
  bytes32 public constant PERMISSIONED_TRADER_ROLE = keccak256("PERMISSIONED_TRADER_ROLE");

  /// @notice The role for permissioned trading router.
  bytes32 public constant PERMISSIONED_ROUTER_ROLE = keccak256("PERMISSIONED_ROUTER_ROLE");

  /***********
   * Structs *
   ***********/

  /// @notice The struct for trading parameters.
  ///
  /// @param router The address of trading router.
  /// @param data The calldata passing to the router contract.
  /// @param minOut The minimum amount of output token should receive.
  struct TradingParameter {
    address router;
    bytes data;
    uint256 minOut;
  }

  /*************
   * Variables *
   *************/

  /// @dev reserved slots.
  uint256[50] private __gap;

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @notice Swap token with permissioned router.
  /// @param srcToken The address of source token.
  /// @param dstToken The address of destination token.
  /// @param amountIn The amount of input token.
  /// @param params The token converting parameters.
  /// @return amountOut The amount of output token received.
  function swap(
    address srcToken,
    address dstToken,
    uint256 amountIn,
    TradingParameter memory params
  ) external returns (uint256 amountOut) {
    amountOut = _doTrade(srcToken, dstToken, amountIn, params);
  }

  /************************
   * Restricted Functions *
   ************************/

  /// @notice Withdraw base token to someone else.
  /// @dev This should be only used when we are retiring this contract.
  /// @param baseToken The address of base token.
  function withdraw(address baseToken, address recipient) external onlyRole(DEFAULT_ADMIN_ROLE) {
    uint256 amountIn = IERC20(baseToken).balanceOf(address(this));
    IERC20(baseToken).safeTransfer(recipient, amountIn);
  }

  /**********************
   * Internal Functions *
   **********************/

  /// @dev Internal function to convert token with routes.
  /// @param srcToken The address of source token.
  /// @param dstToken The address of destination token.
  /// @param amountIn The amount of input token.
  /// @param params The token converting parameters.
  /// @return amountOut The amount of output token received.
  function _doTrade(
    address srcToken,
    address dstToken,
    uint256 amountIn,
    TradingParameter memory params
  ) internal virtual onlyRole(PERMISSIONED_TRADER_ROLE) returns (uint256 amountOut) {
    if (srcToken == dstToken) return amountIn;

    // router should be permissioned
    _checkRole(PERMISSIONED_ROUTER_ROLE, params.router);

    // approve to router
    IERC20(srcToken).forceApprove(params.router, amountIn);

    // do trading
    amountOut = IERC20(dstToken).balanceOf(address(this));
    (bool success, ) = params.router.call(params.data);
    if (!success) {
      // below lines will propagate inner error up
      assembly {
        let ptr := mload(0x40)
        let size := returndatasize()
        returndatacopy(ptr, 0, size)
        revert(ptr, size)
      }
    }

    amountOut = IERC20(dstToken).balanceOf(address(this)) - amountOut;
    if (amountOut < params.minOut) {
      revert InsufficientOutputToken();
    }
  }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.26;

import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

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

import { IMultiPathConverter } from "../helpers/interfaces/IMultiPathConverter.sol";
import { ICurveStableSwapNG } from "../interfaces/Curve/ICurveStableSwapNG.sol";
import { IFxUSDRegeneracy } from "../interfaces/IFxUSDRegeneracy.sol";
import { IPegKeeper } from "../interfaces/IPegKeeper.sol";
import { IFxUSDBasePool } from "../interfaces/IFxUSDBasePool.sol";

contract PegKeeper is AccessControlUpgradeable, IPegKeeper {
  using SafeERC20 for IERC20;

  /**********
   * Errors *
   **********/

  error ErrorNotInCallbackContext();

  error ErrorZeroAddress();

  error ErrorInsufficientOutput();

  /*************
   * Constants *
   *************/

  /// @dev The precision used to compute nav.
  uint256 private constant PRECISION = 1e18;

  /// @notice The role for buyback.
  bytes32 public constant BUYBACK_ROLE = keccak256("BUYBACK_ROLE");

  /// @notice The role for stabilize.
  bytes32 public constant STABILIZE_ROLE = keccak256("STABILIZE_ROLE");

  /// @dev contexts for buyback and stabilize callback
  uint8 private constant CONTEXT_NO_CONTEXT = 1;
  uint8 private constant CONTEXT_BUYBACK = 2;
  uint8 private constant CONTEXT_STABILIZE = 3;

  /***********************
   * Immutable Variables *
   ***********************/

  /// @notice The address of fxUSD.
  address public immutable fxUSD;

  /// @notice The address of stable token.
  address public immutable stable;

  /// @notice The address of FxUSDBasePool.
  address public immutable fxBASE;

  /*********************
   * Storage Variables *
   *********************/

  /// @dev The context for buyback and stabilize callback.
  uint8 private context;

  /// @notice The address of MultiPathConverter.
  address public converter;

  /// @notice The curve pool for stable and fxUSD
  address public curvePool;

  /// @notice The fxUSD depeg price threshold.
  uint256 public priceThreshold;

  /*************
   * Modifiers *
   *************/

  modifier setContext(uint8 c) {
    context = c;
    _;
    context = CONTEXT_NO_CONTEXT;
  }

  /***************
   * Constructor *
   ***************/

  constructor(address _fxBASE) {
    fxBASE = _fxBASE;
    fxUSD = IFxUSDBasePool(_fxBASE).yieldToken();
    stable = IFxUSDBasePool(_fxBASE).stableToken();
  }

  function initialize(address admin, address _converter, address _curvePool) external initializer {
    __Context_init();
    __ERC165_init();
    __AccessControl_init();

    _grantRole(DEFAULT_ADMIN_ROLE, admin);

    _updateConverter(_converter);
    _updateCurvePool(_curvePool);
    _updatePriceThreshold(995000000000000000); // 0.995

    context = CONTEXT_NO_CONTEXT;
  }

  /*************************
   * Public View Functions *
   *************************/

  /// @inheritdoc IPegKeeper
  function isBorrowAllowed() external view returns (bool) {
    return _getFxUSDEmaPrice() >= priceThreshold;
  }

  /// @inheritdoc IPegKeeper
  function isFundingEnabled() external view returns (bool) {
    return _getFxUSDEmaPrice() < priceThreshold;
  }

  /// @inheritdoc IPegKeeper
  function isRedeemAllowed() external view returns (bool) {
    return _getFxUSDEmaPrice() < priceThreshold;
  }

  /// @inheritdoc IPegKeeper
  function getFxUSDPrice() external view returns (uint256) {
    return _getFxUSDEmaPrice();
  }

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @inheritdoc IPegKeeper
  function buyback(
    uint256 amountIn,
    bytes calldata data
  ) external onlyRole(BUYBACK_ROLE) setContext(CONTEXT_BUYBACK) returns (uint256 amountOut, uint256 bonus) {
    (amountOut, bonus) = IFxUSDRegeneracy(fxUSD).buyback(amountIn, _msgSender(), data);
  }

  /// @inheritdoc IPegKeeper
  function stabilize(
    address srcToken,
    uint256 amountIn,
    bytes calldata data
  ) external onlyRole(STABILIZE_ROLE) setContext(CONTEXT_STABILIZE) returns (uint256 amountOut, uint256 bonus) {
    (amountOut, bonus) = IFxUSDBasePool(fxBASE).arbitrage(srcToken, amountIn, _msgSender(), data);
  }

  /// @inheritdoc IPegKeeper
  /// @dev This function will be called in `buyback`, `stabilize`.
  function onSwap(
    address srcToken,
    address targetToken,
    uint256 amountIn,
    bytes calldata data
  ) external returns (uint256 amountOut) {
    // check callback validity
    if (context == CONTEXT_NO_CONTEXT) revert ErrorNotInCallbackContext();

    amountOut = _doSwap(srcToken, amountIn, data);
    IERC20(targetToken).safeTransfer(_msgSender(), amountOut);
  }

  /************************
   * Restricted Functions *
   ************************/

  /// @notice Update the address of converter.
  /// @param newConverter The address of converter.
  function updateConverter(address newConverter) external onlyRole(DEFAULT_ADMIN_ROLE) {
    _updateConverter(newConverter);
  }

  /// @notice Update the address of curve pool.
  /// @param newPool The address of curve pool.
  function updateCurvePool(address newPool) external onlyRole(DEFAULT_ADMIN_ROLE) {
    _updateCurvePool(newPool);
  }

  /// @notice Update the value of depeg price threshold.
  /// @param newThreshold The value of new price threshold.
  function updatePriceThreshold(uint256 newThreshold) external onlyRole(DEFAULT_ADMIN_ROLE) {
    _updatePriceThreshold(newThreshold);
  }

  /**********************
   * Internal Functions *
   **********************/

  /// @dev Internal function to update the address of converter.
  /// @param newConverter The address of converter.
  function _updateConverter(address newConverter) internal {
    if (newConverter == address(0)) revert ErrorZeroAddress();

    address oldConverter = converter;
    converter = newConverter;

    emit UpdateConverter(oldConverter, newConverter);
  }

  /// @dev Internal function to update the address of curve pool.
  /// @param newPool The address of curve pool.
  function _updateCurvePool(address newPool) internal {
    if (newPool == address(0)) revert ErrorZeroAddress();

    address oldPool = curvePool;
    curvePool = newPool;

    emit UpdateCurvePool(oldPool, newPool);
  }

  /// @dev Internal function to update the value of depeg price threshold.
  /// @param newThreshold The value of new price threshold.
  function _updatePriceThreshold(uint256 newThreshold) internal {
    uint256 oldThreshold = priceThreshold;
    priceThreshold = newThreshold;

    emit UpdatePriceThreshold(oldThreshold, newThreshold);
  }

  /// @dev Internal function to do swap.
  /// @param srcToken The address of source token.
  /// @param amountIn The amount of token to use.
  /// @param data The callback data.
  /// @return amountOut The amount of token swapped.
  function _doSwap(address srcToken, uint256 amountIn, bytes calldata data) internal returns (uint256 amountOut) {
    IERC20(srcToken).forceApprove(converter, amountIn);

    (uint256 minOut, uint256 encoding, uint256[] memory routes) = abi.decode(data, (uint256, uint256, uint256[]));
    amountOut = IMultiPathConverter(converter).convert(srcToken, amountIn, encoding, routes);
    if (amountOut < minOut) revert ErrorInsufficientOutput();
  }

  /// @dev Internal function to get curve ema price for fxUSD.
  /// @return price The value of ema price, multiplied by 1e18.
  function _getFxUSDEmaPrice() internal view returns (uint256 price) {
    address cachedCurvePool = curvePool; // gas saving
    address firstCoin = ICurveStableSwapNG(cachedCurvePool).coins(0);
    price = ICurveStableSwapNG(cachedCurvePool).price_oracle(0);
    if (firstCoin == fxUSD) {
      price = (PRECISION * PRECISION) / price;
    }
  }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IHarvesterCallback {
  /// @notice Hook function to handle harvested rewards.
  /// @param token The address of token.
  /// @param amount The amount of tokens.
  function onHarvest(address token, uint256 amount) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IMultiPathConverter {
  function queryConvert(
    uint256 _amount,
    uint256 _encoding,
    uint256[] calldata _routes
  ) external returns (uint256 amountOut);

  function convert(
    address _tokenIn,
    uint256 _amount,
    uint256 _encoding,
    uint256[] calldata _routes
  ) external payable returns (uint256 amountOut);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface ICurveStableSwapNG {
  /*************************
   * Public View Functions *
   *************************/

  function coins(uint256 index) external view returns (address);

  function last_price(uint256 index) external view returns (uint256);

  function ema_price(uint256 index) external view returns (uint256);

  /// @notice Returns the AMM State price of token
  /// @dev if i = 0, it will return the state price of coin[1].
  /// @param i index of state price (0 for coin[1], 1 for coin[2], ...)
  /// @return uint256 The state price quoted by the AMM for coin[i+1]
  function get_p(uint256 i) external view returns (uint256);

  function price_oracle(uint256 index) external view returns (uint256);

  function D_oracle() external view returns (uint256);

  function A() external view returns (uint256);

  function A_precise() external view returns (uint256);

  /// @notice Calculate the current input dx given output dy
  /// @dev Index values can be found via the `coins` public getter method
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @param dy Amount of `j` being received after exchange
  /// @return Amount of `i` predicted
  function get_dx(
    int128 i,
    int128 j,
    uint256 dy
  ) external view returns (uint256);

  /// @notice Calculate the current output dy given input dx
  /// @dev Index values can be found via the `coins` public getter method
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @param dx Amount of `i` being exchanged
  /// @return Amount of `j` predicted
  function get_dy(
    int128 i,
    int128 j,
    uint256 dx
  ) external view returns (uint256);

  /// @notice Calculate the amount received when withdrawing a single coin
  /// @param burn_amount Amount of LP tokens to burn in the withdrawal
  /// @param i Index value of the coin to withdraw
  /// @return Amount of coin received
  function calc_withdraw_one_coin(uint256 burn_amount, int128 i) external view returns (uint256);

  /// @notice The current virtual price of the pool LP token
  /// @dev Useful for calculating profits.
  ///      The method may be vulnerable to donation-style attacks if implementation
  ///      contains rebasing tokens. For integrators, caution is advised.
  /// @return LP token virtual price normalized to 1e18
  function get_virtual_price() external view returns (uint256);

  /// @notice Calculate addition or reduction in token supply from a deposit or withdrawal
  /// @param amounts Amount of each coin being deposited
  /// @param is_deposit set True for deposits, False for withdrawals
  /// @return Expected amount of LP tokens received
  function calc_token_amount(uint256[] calldata amounts, bool is_deposit) external view returns (uint256);

  /// @notice Get the current balance of a coin within the
  ///         pool, less the accrued admin fees
  /// @param i Index value for the coin to query balance of
  /// @return Token balance
  function balances(uint256 i) external view returns (uint256);

  function get_balances() external view returns (uint256[] memory);

  function stored_rates() external view returns (uint256[] memory);

  /// @notice Return the fee for swapping between `i` and `j`
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @return Swap fee expressed as an integer with 1e10 precision
  function dynamic_fee(int128 i, int128 j) external view returns (uint256);

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @notice Perform an exchange between two coins
  /// @dev Index values can be found via the `coins` public getter method
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @param dx Amount of `i` being exchanged
  /// @param min_dy Minimum amount of `j` to receive
  /// @return Actual amount of `j` received
  function exchange(
    int128 i,
    int128 j,
    uint256 dx,
    uint256 min_dy
  ) external returns (uint256);

  /// @notice Perform an exchange between two coins
  /// @dev Index values can be found via the `coins` public getter method
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @param dx Amount of `i` being exchanged
  /// @param min_dy Minimum amount of `j` to receive
  /// @param receiver Address that receives `j`
  /// @return Actual amount of `j` received
  function exchange(
    int128 i,
    int128 j,
    uint256 dx,
    uint256 min_dy,
    address receiver
  ) external returns (uint256);

  /// @notice Perform an exchange between two coins without transferring token in
  /// @dev The contract swaps tokens based on a change in balance of coin[i]. The
  ///      dx = ERC20(coin[i]).balanceOf(self) - self.stored_balances[i]. Users of
  ///      this method are dex aggregators, arbitrageurs, or other users who do not
  ///      wish to grant approvals to the contract: they would instead send tokens
  ///      directly to the contract and call `exchange_received`.
  ///      Note: This is disabled if pool contains rebasing tokens.
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @param dx Amount of `i` being exchanged
  /// @param min_dy Minimum amount of `j` to receive
  /// @return Actual amount of `j` received
  function exchange_received(
    int128 i,
    int128 j,
    uint256 dx,
    uint256 min_dy
  ) external returns (uint256);

  /// @notice Perform an exchange between two coins without transferring token in
  /// @dev The contract swaps tokens based on a change in balance of coin[i]. The
  ///      dx = ERC20(coin[i]).balanceOf(self) - self.stored_balances[i]. Users of
  ///      this method are dex aggregators, arbitrageurs, or other users who do not
  ///      wish to grant approvals to the contract: they would instead send tokens
  ///      directly to the contract and call `exchange_received`.
  ///      Note: This is disabled if pool contains rebasing tokens.
  /// @param i Index value for the coin to send
  /// @param j Index value of the coin to receive
  /// @param dx Amount of `i` being exchanged
  /// @param min_dy Minimum amount of `j` to receive
  /// @param receiver Address that receives `j`
  /// @return Actual amount of `j` received
  function exchange_received(
    int128 i,
    int128 j,
    uint256 dx,
    uint256 min_dy,
    address receiver
  ) external returns (uint256);

  /// @notice Deposit coins into the pool
  /// @param amounts List of amounts of coins to deposit
  /// @param min_mint_amount Minimum amount of LP tokens to mint from the deposit
  /// @return Amount of LP tokens received by depositing
  function add_liquidity(uint256[] calldata amounts, uint256 min_mint_amount) external returns (uint256);

  /// @notice Deposit coins into the pool
  /// @param amounts List of amounts of coins to deposit
  /// @param min_mint_amount Minimum amount of LP tokens to mint from the deposit
  /// @param receiver Address that owns the minted LP tokens
  /// @return Amount of LP tokens received by depositing
  function add_liquidity(
    uint256[] calldata amounts,
    uint256 min_mint_amount,
    address receiver
  ) external returns (uint256);

  /// @notice Withdraw a single coin from the pool
  /// @param burn_amount Amount of LP tokens to burn in the withdrawal
  /// @param i Index value of the coin to withdraw
  /// @param min_received Minimum amount of coin to receive
  /// @return Amount of coin received
  function remove_liquidity_one_coin(
    uint256 burn_amount,
    int128 i,
    uint256 min_received
  ) external returns (uint256);

  /// @notice Withdraw a single coin from the pool
  /// @param burn_amount Amount of LP tokens to burn in the withdrawal
  /// @param i Index value of the coin to withdraw
  /// @param min_received Minimum amount of coin to receive
  /// @param receiver Address that receives the withdrawn coins
  /// @return Amount of coin received
  function remove_liquidity_one_coin(
    uint256 burn_amount,
    int128 i,
    uint256 min_received,
    address receiver
  ) external returns (uint256);

  /// @notice Withdraw coins from the pool in an imbalanced amount
  /// @param amounts List of amounts of underlying coins to withdraw
  /// @param max_burn_amount Maximum amount of LP token to burn in the withdrawal
  /// @return Actual amount of the LP token burned in the withdrawal
  function remove_liquidity_imbalance(uint256[] calldata amounts, uint256 max_burn_amount) external returns (uint256);

  /// @notice Withdraw coins from the pool in an imbalanced amount
  /// @param amounts List of amounts of underlying coins to withdraw
  /// @param max_burn_amount Maximum amount of LP token to burn in the withdrawal
  /// @param receiver Address that receives the withdrawn coins
  /// @return Actual amount of the LP token burned in the withdrawal
  function remove_liquidity_imbalance(
    uint256[] calldata amounts,
    uint256 max_burn_amount,
    address receiver
  ) external returns (uint256);

  /// @notice Withdraw coins from the pool
  /// @dev Withdrawal amounts are based on current deposit ratios
  /// @param burn_amount Quantity of LP tokens to burn in the withdrawal
  /// @param min_amounts Minimum amounts of underlying coins to receive
  /// @return List of amounts of coins that were withdrawn
  function remove_liquidity(uint256 burn_amount, uint256[] calldata min_amounts) external returns (uint256[] memory);

  /// @notice Withdraw coins from the pool
  /// @dev Withdrawal amounts are based on current deposit ratios
  /// @param burn_amount Quantity of LP tokens to burn in the withdrawal
  /// @param min_amounts Minimum amounts of underlying coins to receive
  /// @param receiver Address that receives the withdrawn coins
  /// @return List of amounts of coins that were withdrawn
  function remove_liquidity(
    uint256 burn_amount,
    uint256[] calldata min_amounts,
    address receiver
  ) external returns (uint256[] memory);

  /// @notice Withdraw coins from the pool
  /// @dev Withdrawal amounts are based on current deposit ratios
  /// @param burn_amount Quantity of LP tokens to burn in the withdrawal
  /// @param min_amounts Minimum amounts of underlying coins to receive
  /// @param receiver Address that receives the withdrawn coins
  /// @return List of amounts of coins that were withdrawn
  function remove_liquidity(
    uint256 burn_amount,
    uint256[] calldata min_amounts,
    address receiver,
    bool claim_admin_fees
  ) external returns (uint256[] memory);

  /// @notice Claim admin fees. Callable by anyone.
  function withdraw_admin_fees() external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IFxUSDBasePool {
  /**********
   * Events *
   **********/

  /// @notice Emitted when the stable depeg price is updated.
  /// @param oldPrice The value of previous depeg price, multiplied by 1e18.
  /// @param newPrice The value of current depeg price, multiplied by 1e18.
  event UpdateStableDepegPrice(uint256 oldPrice, uint256 newPrice);

  /// @notice Emitted when the redeem cool down period is updated.
  /// @param oldPeriod The value of previous redeem cool down period.
  /// @param newPeriod The value of current redeem cool down period.
  event UpdateRedeemCoolDownPeriod(uint256 oldPeriod, uint256 newPeriod);

  /// @notice Emitted when the instant redeem fee ratio is updated.
  /// @param oldRatio The value of previous instant redeem fee ratio, multiplied by 1e18.
  /// @param newRatio The value of current instant redeem fee ratio, multiplied by 1e18.
  event UpdateInstantRedeemFeeRatio(uint256 oldRatio, uint256 newRatio);

  /// @notice Emitted when deposit tokens.
  /// @param caller The address of caller.
  /// @param receiver The address of pool share recipient.
  /// @param tokenIn The address of input token.
  /// @param amountDeposited The amount of input tokens.
  /// @param amountSharesOut The amount of pool shares minted.
  event Deposit(
    address indexed caller,
    address indexed receiver,
    address indexed tokenIn,
    uint256 amountDeposited,
    uint256 amountSharesOut
  );
  
  /// @notice Emitted when users request redeem.
  /// @param caller The address of caller.
  /// @param shares The amount of shares to redeem.
  /// @param unlockAt The timestamp when this share can be redeemed.
  event RequestRedeem(address indexed caller, uint256 shares, uint256 unlockAt);

  /// @notice Emitted when redeem pool shares.
  /// @param caller The address of caller.
  /// @param receiver The address of pool share recipient.
  /// @param amountSharesToRedeem The amount of pool shares burned.
  /// @param amountYieldTokenOut The amount of yield tokens redeemed.
  /// @param amountStableTokenOut The amount of stable tokens redeemed.
  event Redeem(
    address indexed caller,
    address indexed receiver,
    uint256 amountSharesToRedeem,
    uint256 amountYieldTokenOut,
    uint256 amountStableTokenOut
  );

  /// @notice Emitted when instant redeem pool shares.
  /// @param caller The address of caller.
  /// @param receiver The address of pool share recipient.
  /// @param amountSharesToRedeem The amount of pool shares burned.
  /// @param amountYieldTokenOut The amount of yield tokens redeemed.
  /// @param amountStableTokenOut The amount of stable tokens redeemed.
  event InstantRedeem(
    address indexed caller,
    address indexed receiver,
    uint256 amountSharesToRedeem,
    uint256 amountYieldTokenOut,
    uint256 amountStableTokenOut
  );

  /// @notice Emitted when rebalance or liquidate.
  /// @param caller The address of caller.
  /// @param tokenIn The address of input token.
  /// @param amountTokenIn The amount of input token used.
  /// @param amountCollateral The amount of collateral token rebalanced.
  /// @param amountYieldToken The amount of yield token used.
  /// @param amountStableToken The amount of stable token used.
  event Rebalance(
    address indexed caller,
    address indexed tokenIn,
    uint256 amountTokenIn,
    uint256 amountCollateral,
    uint256 amountYieldToken,
    uint256 amountStableToken
  );

  /// @notice Emitted when arbitrage in curve pool.
  /// @param caller The address of caller.
  /// @param tokenIn The address of input token.
  /// @param amountIn The amount of input token used.
  /// @param amountOut The amount of output token swapped.
  /// @param bonusOut The amount of bonus token.
  event Arbitrage(
    address indexed caller,
    address indexed tokenIn,
    uint256 amountIn,
    uint256 amountOut,
    uint256 bonusOut
  );

  /*************************
   * Public View Functions *
   *************************/

  /// @notice The address of yield token.
  function yieldToken() external view returns (address);

  /// @notice The address of stable token.
  function stableToken() external view returns (address);

  /// @notice The total amount of yield token managed in this contract
  function totalYieldToken() external view returns (uint256);

  /// @notice The total amount of stable token managed in this contract
  function totalStableToken() external view returns (uint256);

  /// @notice The net asset value, multiplied by 1e18.
  function nav() external view returns (uint256);

  /// @notice Return the stable token price, multiplied by 1e18.
  function getStableTokenPrice() external view returns (uint256);

  /// @notice Return the stable token price with scaling to 18 decimals, multiplied by 1e18.
  function getStableTokenPriceWithScale() external view returns (uint256);

  /// @notice Preview the result of deposit.
  /// @param tokenIn The address of input token.
  /// @param amount The amount of input tokens to deposit.
  /// @return amountSharesOut The amount of pool shares should receive.
  function previewDeposit(address tokenIn, uint256 amount) external view returns (uint256 amountSharesOut);

  /// @notice Preview the result of redeem.
  /// @param amountSharesToRedeem The amount of pool shares to redeem.
  /// @return amountYieldOut The amount of yield token should receive.
  /// @return amountStableOut The amount of stable token should receive.
  function previewRedeem(
    uint256 amountSharesToRedeem
  ) external view returns (uint256 amountYieldOut, uint256 amountStableOut);

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @notice Deposit token.
  /// @param receiver The address of pool shares recipient.
  /// @param tokenIn The address of input token.
  /// @param amountTokenToDeposit The amount of input tokens to deposit.
  /// @param minSharesOut The minimum amount of pool shares should receive.
  /// @return amountSharesOut The amount of pool shares received.
  function deposit(
    address receiver,
    address tokenIn,
    uint256 amountTokenToDeposit,
    uint256 minSharesOut
  ) external returns (uint256 amountSharesOut);

  /// @notice Request redeem.
  /// @param shares The amount of shares to request.
  function requestRedeem(uint256 shares) external;

  /// @notice Redeem pool shares.
  /// @param receiver The address of token recipient.
  /// @param shares The amount of pool shares to redeem.
  /// @return amountYieldOut The amount of yield token should received.
  /// @return amountStableOut The amount of stable token should received.
  function redeem(address receiver, uint256 shares) external returns (uint256 amountYieldOut, uint256 amountStableOut);

  /// @notice Redeem pool shares instantly with withdraw fee.
  /// @param receiver The address of token recipient.
  /// @param shares The amount of pool shares to redeem.
  /// @return amountYieldOut The amount of yield token should received.
  /// @return amountStableOut The amount of stable token should received.
  function instantRedeem(address receiver, uint256 shares) external returns (uint256 amountYieldOut, uint256 amountStableOut);

  /// @notice Redeem pool shares instantly without withdraw fee.
  /// @param receiver The address of token recipient.
  /// @param shares The amount of pool shares to redeem.
  /// @return amountYieldOut The amount of yield token should received.
  /// @return amountStableOut The amount of stable token should received.
  function instantRedeemNoFee(address receiver, uint256 shares) external returns (uint256 amountYieldOut, uint256 amountStableOut);

  /// @notice Rebalance all positions in the given tick.
  /// @param pool The address of pool to rebalance.
  /// @param tick The index of tick to rebalance.
  /// @param tokenIn The address of token to rebalance.
  /// @param maxAmount The maximum amount of input token to rebalance.
  /// @param minBaseOut The minimum amount of collateral tokens should receive.
  /// @return tokenUsed The amount of input token used to rebalance.
  /// @return baseOut The amount of collateral tokens rebalanced.
  function rebalance(
    address pool,
    int16 tick,
    address tokenIn,
    uint256 maxAmount,
    uint256 minBaseOut
  ) external returns (uint256 tokenUsed, uint256 baseOut);

  /// @notice Rebalance all possible ticks.
  /// @param pool The address of pool to rebalance.
  /// @param tokenIn The address of token to rebalance.
  /// @param maxAmount The maximum amount of input token to rebalance.
  /// @param minBaseOut The minimum amount of collateral tokens should receive.
  /// @return tokenUsed The amount of input token used to rebalance.
  /// @return baseOut The amount of collateral tokens rebalanced.
  function rebalance(
    address pool,
    address tokenIn,
    uint256 maxAmount,
    uint256 minBaseOut
  ) external returns (uint256 tokenUsed, uint256 baseOut);

  /// @notice Liquidate all possible ticks.
  /// @param pool The address of pool to rebalance.
  /// @param tokenIn The address of token to rebalance.
  /// @param maxAmount The maximum amount of input token to rebalance.
  /// @param minBaseOut The minimum amount of collateral tokens should receive.
  /// @return tokenUsed The amount of input token used to rebalance.
  /// @return baseOut The amount of collateral tokens rebalanced.
  function liquidate(
    address pool,
    address tokenIn,
    uint256 maxAmount,
    uint256 minBaseOut
  ) external returns (uint256 tokenUsed, uint256 baseOut);

  /// @notice Arbitrage between yield token and stable token.
  /// @param srcToken The address of source token.
  /// @param amountIn The amount of source token to use.
  /// @param receiver The address of bonus receiver.
  /// @param data The hook data to `onSwap`.
  /// @return amountOut The amount of target token swapped.
  /// @return bonusOut The amount of bonus token.
  function arbitrage(
    address srcToken,
    uint256 amountIn,
    address receiver,
    bytes calldata data
  ) external returns (uint256 amountOut, uint256 bonusOut);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IFxUSDRegeneracy {
  /**********
   * Events *
   **********/
  
  /// @notice Emitted when rebalance/liquidate with stable token.
  /// @param amountStable The amount of stable token used.
  /// @param amountFxUSD The corresponding amount of fxUSD.
  event RebalanceWithStable(uint256 amountStable, uint256 amountFxUSD);
  
  /// @notice Emitted when buyback fxUSD with stable reserve.
  /// @param amountStable the amount of stable token used.
  /// @param amountFxUSD The amount of fxUSD bought.
  /// @param bonusFxUSD The amount of fxUSD as bonus for caller.
  event Buyback(uint256 amountStable, uint256 amountFxUSD, uint256 bonusFxUSD);

  /*************************
   * Public View Functions *
   *************************/

  /// @notice The address of `PoolManager` contract.
  function poolManager() external view returns (address);

  /// @notice The address of stable token.
  function stableToken() external view returns (address);

  /// @notice The address of `PegKeeper` contract.
  function pegKeeper() external view returns (address);

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @notice Mint fxUSD token someone.
  function mint(address to, uint256 amount) external;

  /// @notice Burn fxUSD from someone.
  function burn(address from, uint256 amount) external;

  /// @notice Hook for rebalance/liquidate with stable token.
  /// @param amountStableToken The amount of stable token.
  /// @param amountFxUSD The amount of fxUSD.
  function onRebalanceWithStable(uint256 amountStableToken, uint256 amountFxUSD) external;

  /// @notice Buyback fxUSD with stable token.
  /// @param amountIn the amount of stable token to use.
  /// @param receiver The address of bonus receiver.
  /// @param data The hook data to PegKeeper.
  /// @return amountOut The amount of fxUSD swapped.
  /// @return bonusOut The amount of bonus fxUSD.
  function buyback(
    uint256 amountIn,
    address receiver,
    bytes calldata data
  ) external returns (uint256 amountOut, uint256 bonusOut);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

interface IPegKeeper {
  /**********
   * Events *
   **********/

  /// @notice Emitted when the converter contract is updated.
  /// @param oldConverter The address of previous converter contract.
  /// @param newConverter The address of current converter contract.
  event UpdateConverter(address indexed oldConverter, address indexed newConverter);

  /// @notice Emitted when the curve pool contract is updated.
  /// @param oldPool The address of previous curve pool contract.
  /// @param newPool The address of current curve pool contract.
  event UpdateCurvePool(address indexed oldPool, address indexed newPool);

  /// @notice Emitted when the price threshold is updated.
  /// @param oldThreshold The value of previous price threshold
  /// @param newThreshold The value of current price threshold
  event UpdatePriceThreshold(uint256 oldThreshold, uint256 newThreshold);

  /*************************
   * Public View Functions *
   *************************/

  /// @notice Return whether borrow for fxUSD is allowed.
  function isBorrowAllowed() external view returns (bool);

  /// @notice Return whether redeem fxUSD is allowed.
  function isRedeemAllowed() external view returns (bool);

  /// @notice Return whether funding costs is enabled.
  function isFundingEnabled() external view returns (bool);
  
  /// @notice Return the price of fxUSD, multiplied by 1e18
  function getFxUSDPrice() external view returns (uint256);

  /****************************
   * Public Mutated Functions *
   ****************************/

  /// @notice Buyback fxUSD with stable reserve in FxUSDSave.
  /// @param amountIn the amount of stable token to use.
  /// @param data The hook data to `onSwap`.
  /// @return amountOut The amount of fxUSD swapped.
  /// @return bonusOut The amount of bonus fxUSD.
  function buyback(uint256 amountIn, bytes calldata data) external returns (uint256 amountOut, uint256 bonusOut);

  /// @notice Stabilize the fxUSD price in curve pool.
  /// @param srcToken The address of source token (fxUSD or stable token).
  /// @param amountIn the amount of source token to use.
  /// @param data The hook data to `onSwap`.
  /// @return amountOut The amount of target token swapped.
  /// @return bonusOut The amount of bonus token.
  function stabilize(
    address srcToken,
    uint256 amountIn,
    bytes calldata data
  ) external returns (uint256 amountOut, uint256 bonusOut);

  /// @notice Swap callback from `buyback` and `stabilize`.
  /// @param srcToken The address of source token.
  /// @param srcToken The address of target token.
  /// @param amountIn the amount of source token to use.
  /// @param data The callback data.
  /// @return amountOut The amount of target token swapped.
  function onSwap(
    address srcToken,
    address targetToken,
    uint256 amountIn,
    bytes calldata data
  ) external returns (uint256 amountOut);
}

{
  "evmVersion": "cancun",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "npm/@openzeppelin/contracts-upgradeable@5.4.0/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "npm/@openzeppelin/contracts-upgradeable@5.4.0/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "npm/@openzeppelin/contracts-upgradeable@5.4.0/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "project/:@openzeppelin/contracts-upgradeable/=npm/@openzeppelin/contracts-upgradeable@5.4.0/",
    "project/:@openzeppelin/contracts-upgradeable/=npm/@openzeppelin/contracts-upgradeable@5.4.0/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/",
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/contracts@5.4.0/"
  ]
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"name":"AccessControlBadConfirmation","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bytes32","name":"neededRole","type":"bytes32"}],"name":"AccessControlUnauthorizedAccount","type":"error"},{"inputs":[],"name":"ErrorMulticallFailed","type":"error"},{"inputs":[],"name":"InsufficientOutputToken","type":"error"},{"inputs":[],"name":"InvalidInitialization","type":"error"},{"inputs":[],"name":"NotInitializing","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint64","name":"version","type":"uint64"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"inputs":[],"name":"BATCH_TRANSFER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"BUYBACK_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MULTICALL_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PEG_KEEPER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMISSIONED_ROUTER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMISSIONED_TRADER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"STABILIZE_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TOKEN_RECEIVER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address[]","name":"receivers","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"batchTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pegKeeper","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"buyback","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"bonus","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"targets","type":"address[]"},{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"callerConfirmation","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pegKeeper","type":"address"},{"internalType":"address","name":"srcToken","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"stabilize","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"bonus","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"srcToken","type":"address"},{"internalType":"address","name":"dstToken","type":"address"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"components":[{"internalType":"address","name":"router","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"},{"internalType":"uint256","name":"minOut","type":"uint256"}],"internalType":"struct PermissionedSwap.TradingParameter","name":"params","type":"tuple"}],"name":"swap","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"baseToken","type":"address"},{"internalType":"address","name":"recipient","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

6080604052348015600e575f80fd5b506115168061001c5f395ff3fe608060405234801561000f575f80fd5b506004361061013d575f3560e01c8063a590bc1e116100b4578063d547741f11610079578063d547741f146102ef578063de52e72114610302578063e1ccf11c14610329578063f1b6d5ea14610350578063f940e38514610377578063fe3fc3691461038a575f80fd5b8063a590bc1e14610253578063a91c1d3c1461027b578063b720e658146102a2578063b7f11c21146102b5578063c4d66de8146102dc575f80fd5b80633500ae8e116101055780633500ae8e146101d957806336568abe146101ec57806363fb0b96146101ff578063795277651461021257806391d1485414610239578063a217fddf1461024c575f80fd5b806301ffc9a7146101415780630dda2e53146101695780631239ec8c1461019e578063248a9ca3146101b35780632f2ff15d146101c6575b5f80fd5b61015461014f366004610f3a565b6103b1565b60405190151581526020015b60405180910390f35b6101907f759995689d0b5a8d082ba285697cd721c40ae33fadfeb8da798e7c4b54e8827d81565b604051908152602001610160565b6101b16101ac366004610fca565b6103e7565b005b6101906101c1366004611048565b6104d8565b6101b16101d436600461105f565b6104f8565b6101906101e73660046110f5565b61051a565b6101b16101fa36600461105f565b610530565b6101b161020d3660046111fc565b610568565b6101907f84060c990e14b08d7c5d95f3c4be08c8b28742dee5236bc38e7559b465ca531f81565b61015461024736600461105f565b610670565b6101905f81565b6102666102613660046112a3565b6106a6565b60408051928352602083019190915201610160565b6101907f8ba312960b5597dbb6106c0155aa0551317467e13792b46ce452b4e143b06e1381565b6102666102b03660046112fb565b610752565b6101907fa7c777b85fc58675e1f97f547c6d0658b5454f6e82d1930f8a36716c5ac0de0581565b6101b16102ea366004611344565b6107fb565b6101b16102fd36600461105f565b61090b565b6101907f795faeccae94bd9eed40852cb158e30f590ffa7acbfa89a0204147c5bcf072cd81565b6101907fd0deb57dbcd9ea4bdf9c5591c75b12b446541d89029fe7721eaa93f04d0c1d8381565b6101907f607b5964b99ba60004997a77c26b85dfbfe3dd5c8325bfb94d82d08cf63c693281565b6101b161038536600461135d565b610927565b6101907f90ba4e11ad240e3543d2e8a32e330be1330b184ccfcddfdcf9cefb7f695dc7ca81565b5f6001600160e01b03198216637965db0b60e01b14806103e157506301ffc9a760e01b6001600160e01b03198316145b92915050565b7f8ba312960b5597dbb6106c0155aa0551317467e13792b46ce452b4e143b06e13610411816109af565b5f5b848110156104cf5761046b7f607b5964b99ba60004997a77c26b85dfbfe3dd5c8325bfb94d82d08cf63c693287878481811061045157610451611385565b90506020020160208101906104669190611344565b6109bc565b6104c786868381811061048057610480611385565b90506020020160208101906104959190611344565b8585848181106104a7576104a7611385565b90506020020135896001600160a01b03166109fe9092919063ffffffff16565b600101610413565b50505050505050565b5f9081525f805160206114c1833981519152602052604090206001015490565b610501826104d8565b61050a816109af565b6105148383610a5d565b50505050565b5f61052785858585610afe565b95945050505050565b6001600160a01b03811633146105595760405163334bd91960e11b815260040160405180910390fd5b6105638282610d0d565b505050565b7f759995689d0b5a8d082ba285697cd721c40ae33fadfeb8da798e7c4b54e8827d610592816109af565b5f5b84811015610668575f8686838181106105af576105af611385565b90506020020160208101906105c49190611344565b6001600160a01b03168585848181106105df576105df611385565b90506020028101906105f19190611399565b6040516105ff9291906113db565b5f604051808303815f865af19150503d805f8114610638576040519150601f19603f3d011682016040523d82523d5f602084013e61063d565b606091505b505090508061065f57604051637935110d60e01b815260040160405180910390fd5b50600101610594565b505050505050565b5f9182525f805160206114c1833981519152602090815260408084206001600160a01b0393909316845291905290205460ff1690565b5f807f90ba4e11ad240e3543d2e8a32e330be1330b184ccfcddfdcf9cefb7f695dc7ca6106d2816109af565b6040516374d98e6f60e11b81526001600160a01b0389169063e9b31cde90610704908a908a908a908a90600401611412565b60408051808303815f875af115801561071f573d5f803e3d5ffd5b505050506040513d601f19601f820116820180604052508101906107439190611439565b90999098509650505050505050565b5f807fa7c777b85fc58675e1f97f547c6d0658b5454f6e82d1930f8a36716c5ac0de0561077e816109af565b6040516307f3234560e51b81526001600160a01b0388169063fe6468a0906107ae9089908990899060040161145b565b60408051808303815f875af11580156107c9573d5f803e3d5ffd5b505050506040513d601f19601f820116820180604052508101906107ed9190611439565b909890975095505050505050565b5f610804610d86565b805490915060ff600160401b82041615906001600160401b03165f8115801561082a5750825b90505f826001600160401b031660011480156108455750303b155b905081158015610853575080155b156108715760405163f92ee8a960e01b815260040160405180910390fd5b845467ffffffffffffffff19166001178555831561089b57845460ff60401b1916600160401b1785555b6108a3610dae565b6108ab610dae565b6108b3610dae565b6108bd5f87610a5d565b50831561066857845460ff60401b19168555604051600181527fc7f505b2f371ae2175ee4913f4499e1f2633a7b5936321eed1cdaeb6115181d29060200160405180910390a1505050505050565b610914826104d8565b61091d816109af565b6105148383610d0d565b5f610931816109af565b6040516370a0823160e01b81523060048201525f906001600160a01b038516906370a0823190602401602060405180830381865afa158015610975573d5f803e3d5ffd5b505050506040513d601f19601f820116820180604052508101906109999190611474565b90506105146001600160a01b03851684836109fe565b6109b981336109bc565b50565b6109c68282610670565b6109fa5760405163e2517d3f60e01b81526001600160a01b0382166004820152602481018390526044015b60405180910390fd5b5050565b6040516001600160a01b0383811660248301526044820183905261056391859182169063a9059cbb906064015b604051602081830303815290604052915060e01b6020820180516001600160e01b038381831617835250505050610db8565b5f5f805160206114c1833981519152610a768484610670565b610af5575f848152602082815260408083206001600160a01b03871684529091529020805460ff19166001179055610aab3390565b6001600160a01b0316836001600160a01b0316857f2f8788117e7eff1d82e926ec794901d17c78024a50270940304540a733656f0d60405160405180910390a460019150506103e1565b5f9150506103e1565b5f7f84060c990e14b08d7c5d95f3c4be08c8b28742dee5236bc38e7559b465ca531f610b29816109af565b846001600160a01b0316866001600160a01b031603610b4a57839150610d04565b610b777f795faeccae94bd9eed40852cb158e30f590ffa7acbfa89a0204147c5bcf072cd845f01516109bc565b8251610b8e906001600160a01b0388169086610e24565b6040516370a0823160e01b81523060048201526001600160a01b038616906370a0823190602401602060405180830381865afa158015610bd0573d5f803e3d5ffd5b505050506040513d601f19601f82011682018060405250810190610bf49190611474565b91505f835f01516001600160a01b03168460200151604051610c16919061148b565b5f604051808303815f865af19150503d805f8114610c4f576040519150601f19603f3d011682016040523d82523d5f602084013e610c54565b606091505b5050905080610c69576040513d805f833e8082fd5b6040516370a0823160e01b815230600482015283906001600160a01b038816906370a0823190602401602060405180830381865afa158015610cad573d5f803e3d5ffd5b505050506040513d601f19601f82011682018060405250810190610cd19190611474565b610cdb91906114a1565b92508360400151831015610d0257604051638bf3fb6f60e01b815260040160405180910390fd5b505b50949350505050565b5f5f805160206114c1833981519152610d268484610670565b15610af5575f848152602082815260408083206001600160a01b0387168085529252808320805460ff1916905551339287917ff6391f5c32d9c69d2a47ea670b442974b53935d1edc7fd64eb21e047a839171b9190a460019150506103e1565b5f807ff0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a006103e1565b610db6610eb3565b565b5f8060205f8451602086015f885af180610dd7576040513d5f823e3d81fd5b50505f513d91508115610dee578060011415610dfb565b6001600160a01b0384163b155b1561051457604051635274afe760e01b81526001600160a01b03851660048201526024016109f1565b604080516001600160a01b038416602482015260448082018490528251808303909101815260649091019091526020810180516001600160e01b031663095ea7b360e01b179052610e758482610ed8565b610514576040516001600160a01b0384811660248301525f6044830152610ea991869182169063095ea7b390606401610a2b565b6105148482610db8565b610ebb610f21565b610db657604051631afcd79f60e31b815260040160405180910390fd5b5f805f8060205f8651602088015f8a5af192503d91505f519050828015610f1757508115610f095780600114610f17565b5f866001600160a01b03163b115b9695505050505050565b5f610f2a610d86565b54600160401b900460ff16919050565b5f60208284031215610f4a575f80fd5b81356001600160e01b031981168114610f61575f80fd5b9392505050565b80356001600160a01b0381168114610f7e575f80fd5b919050565b5f8083601f840112610f93575f80fd5b5081356001600160401b03811115610fa9575f80fd5b6020830191508360208260051b8501011115610fc3575f80fd5b9250929050565b5f805f805f60608688031215610fde575f80fd5b610fe786610f68565b945060208601356001600160401b03811115611001575f80fd5b61100d88828901610f83565b90955093505060408601356001600160401b0381111561102b575f80fd5b61103788828901610f83565b969995985093965092949392505050565b5f60208284031215611058575f80fd5b5035919050565b5f8060408385031215611070575f80fd5b8235915061108060208401610f68565b90509250929050565b634e487b7160e01b5f52604160045260245ffd5b604051606081016001600160401b03811182821017156110bf576110bf611089565b60405290565b604051601f8201601f191681016001600160401b03811182821017156110ed576110ed611089565b604052919050565b5f805f8060808587031215611108575f80fd5b61111185610f68565b935061111f60208601610f68565b92506040850135915060608501356001600160401b03811115611140575f80fd5b850160608188031215611151575f80fd5b61115961109d565b61116282610f68565b815260208201356001600160401b0381111561117c575f80fd5b8201601f8101891361118c575f80fd5b80356001600160401b038111156111a5576111a5611089565b6111b8601f8201601f19166020016110c5565b8181528a60208385010111156111cc575f80fd5b816020840160208301375f6020928201830152908301525060409182013591810191909152939692955090935050565b5f805f806040858703121561120f575f80fd5b84356001600160401b03811115611224575f80fd5b61123087828801610f83565b90955093505060208501356001600160401b0381111561124e575f80fd5b61125a87828801610f83565b95989497509550505050565b5f8083601f840112611276575f80fd5b5081356001600160401b0381111561128c575f80fd5b602083019150836020828501011115610fc3575f80fd5b5f805f805f608086880312156112b7575f80fd5b6112c086610f68565b94506112ce60208701610f68565b93506040860135925060608601356001600160401b038111156112ef575f80fd5b61103788828901611266565b5f805f806060858703121561130e575f80fd5b61131785610f68565b93506020850135925060408501356001600160401b03811115611338575f80fd5b61125a87828801611266565b5f60208284031215611354575f80fd5b610f6182610f68565b5f806040838503121561136e575f80fd5b61137783610f68565b915061108060208401610f68565b634e487b7160e01b5f52603260045260245ffd5b5f808335601e198436030181126113ae575f80fd5b8301803591506001600160401b038211156113c7575f80fd5b602001915036819003821315610fc3575f80fd5b818382375f9101908152919050565b81835281816020850137505f828201602090810191909152601f909101601f19169091010190565b60018060a01b0385168152836020820152606060408201525f610f176060830184866113ea565b5f806040838503121561144a575f80fd5b505080516020909101519092909150565b838152604060208201525f6105276040830184866113ea565b5f60208284031215611484575f80fd5b5051919050565b5f82518060208501845e5f920191825250919050565b818103818111156103e157634e487b7160e01b5f52601160045260245ffdfe02dd7bc7dec4dceedda775e58dd541e08a116c6c53815c0bd028192f7b626800a2646970667358221220cfe2f78ac96ed6fd4d88980f0ce61229b21a697813f2ed5e52da957b7bf0a7c464736f6c634300081a0033

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