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// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {IEthPrivVault} from '../../interfaces/IEthPrivVault.sol';
import {IEthVaultFactory} from '../../interfaces/IEthVaultFactory.sol';
import {VaultEthStaking, IVaultEthStaking} from '../modules/VaultEthStaking.sol';
import {VaultOsToken, IVaultOsToken} from '../modules/VaultOsToken.sol';
import {VaultWhitelist} from '../modules/VaultWhitelist.sol';
import {IVaultVersion} from '../modules/VaultVersion.sol';
import {EthVault, IEthVault} from './EthVault.sol';

/**
 * @title EthPrivVault
 * @author StakeWise
 * @notice Defines the Ethereum staking Vault with whitelist
 */
contract EthPrivVault is Initializable, EthVault, VaultWhitelist, IEthPrivVault {
  // slither-disable-next-line shadowing-state
  uint8 private constant _version = 2;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param _keeper The address of the Keeper contract
   * @param _vaultsRegistry The address of the VaultsRegistry contract
   * @param _validatorsRegistry The contract address used for registering validators in beacon chain
   * @param osTokenVaultController The address of the OsTokenVaultController contract
   * @param osTokenConfig The address of the OsTokenConfig contract
   * @param sharedMevEscrow The address of the shared MEV escrow
   * @param depositDataRegistry The address of the DepositDataRegistry contract
   * @param exitingAssetsClaimDelay The delay after which the assets can be claimed after exiting from staking
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(
    address _keeper,
    address _vaultsRegistry,
    address _validatorsRegistry,
    address osTokenVaultController,
    address osTokenConfig,
    address sharedMevEscrow,
    address depositDataRegistry,
    uint256 exitingAssetsClaimDelay
  )
    EthVault(
      _keeper,
      _vaultsRegistry,
      _validatorsRegistry,
      osTokenVaultController,
      osTokenConfig,
      sharedMevEscrow,
      depositDataRegistry,
      exitingAssetsClaimDelay
    )
  {}

  /// @inheritdoc IEthVault
  function initialize(
    bytes calldata params
  ) external payable virtual override(IEthVault, EthVault) reinitializer(_version) {
    // if admin is already set, it's an upgrade
    if (admin != address(0)) {
      __EthVault_initV2();
      return;
    }
    // initialize deployed vault
    address _admin = IEthVaultFactory(msg.sender).vaultAdmin();
    __EthVault_init(
      _admin,
      IEthVaultFactory(msg.sender).ownMevEscrow(),
      abi.decode(params, (EthVaultInitParams))
    );
    // whitelister is initially set to admin address
    __VaultWhitelist_init(_admin);
  }

  /// @inheritdoc IVaultEthStaking
  function deposit(
    address receiver,
    address referrer
  ) public payable virtual override(IVaultEthStaking, VaultEthStaking) returns (uint256 shares) {
    _checkWhitelist(msg.sender);
    _checkWhitelist(receiver);
    return super.deposit(receiver, referrer);
  }

  /// @inheritdoc VaultEthStaking
  receive() external payable virtual override {
    _checkWhitelist(msg.sender);
    _deposit(msg.sender, msg.value, address(0));
  }

  /// @inheritdoc IVaultOsToken
  function mintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer
  ) public virtual override(IVaultOsToken, VaultOsToken) returns (uint256 assets) {
    _checkWhitelist(msg.sender);
    return super.mintOsToken(receiver, osTokenShares, referrer);
  }

  /// @inheritdoc IVaultVersion
  function vaultId() public pure virtual override(IVaultVersion, EthVault) returns (bytes32) {
    return keccak256('EthPrivVault');
  }

  /// @inheritdoc IVaultVersion
  function version() public pure virtual override(IVaultVersion, EthVault) returns (uint8) {
    return _version;
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (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 reininitialization) 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 Returns a pointer to the storage namespace.
     */
    // solhint-disable-next-line var-name-mixedcase
    function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
        assembly {
            $.slot := INITIALIZABLE_STORAGE
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.20;

import {IERC1822Proxiable} from "@openzeppelin/contracts/interfaces/draft-IERC1822.sol";
import {ERC1967Utils} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol";
import {Initializable} from "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822Proxiable {
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
    address private immutable __self = address(this);

    /**
     * @dev The version of the upgrade interface of the contract. If this getter is missing, both `upgradeTo(address)`
     * and `upgradeToAndCall(address,bytes)` are present, and `upgradeTo` must be used if no function should be called,
     * while `upgradeToAndCall` will invoke the `receive` function if the second argument is the empty byte string.
     * If the getter returns `"5.0.0"`, only `upgradeToAndCall(address,bytes)` is present, and the second argument must
     * be the empty byte string if no function should be called, making it impossible to invoke the `receive` function
     * during an upgrade.
     */
    string public constant UPGRADE_INTERFACE_VERSION = "5.0.0";

    /**
     * @dev The call is from an unauthorized context.
     */
    error UUPSUnauthorizedCallContext();

    /**
     * @dev The storage `slot` is unsupported as a UUID.
     */
    error UUPSUnsupportedProxiableUUID(bytes32 slot);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        _checkProxy();
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        _checkNotDelegated();
        _;
    }

    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual notDelegated returns (bytes32) {
        return ERC1967Utils.IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     *
     * @custom:oz-upgrades-unsafe-allow-reachable delegatecall
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) public payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data);
    }

    /**
     * @dev Reverts if the execution is not performed via delegatecall or the execution
     * context is not of a proxy with an ERC1967-compliant implementation pointing to self.
     * See {_onlyProxy}.
     */
    function _checkProxy() internal view virtual {
        if (
            address(this) == __self || // Must be called through delegatecall
            ERC1967Utils.getImplementation() != __self // Must be called through an active proxy
        ) {
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Reverts if the execution is performed via delegatecall.
     * See {notDelegated}.
     */
    function _checkNotDelegated() internal view virtual {
        if (address(this) != __self) {
            // Must not be called through delegatecall
            revert UUPSUnauthorizedCallContext();
        }
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev Performs an implementation upgrade with a security check for UUPS proxies, and additional setup call.
     *
     * As a security check, {proxiableUUID} is invoked in the new implementation, and the return value
     * is expected to be the implementation slot in ERC1967.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function _upgradeToAndCallUUPS(address newImplementation, bytes memory data) private {
        try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
            if (slot != ERC1967Utils.IMPLEMENTATION_SLOT) {
                revert UUPSUnsupportedProxiableUUID(slot);
            }
            ERC1967Utils.upgradeToAndCall(newImplementation, data);
        } catch {
            // The implementation is not UUPS
            revert ERC1967Utils.ERC1967InvalidImplementation(newImplementation);
        }
    }
}

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

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

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

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

    /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard
    struct ReentrancyGuardStorage {
        uint256 _status;
    }

    // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
    bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;

    function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) {
        assembly {
            $.slot := ReentrancyGuardStorageLocation
        }
    }

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

    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
        $._status = NOT_ENTERED;
    }

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.20;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822Proxiable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC1271.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)

pragma solidity ^0.8.20;

interface IERC5267 {
    /**
     * @dev MAY be emitted to signal that the domain could have changed.
     */
    event EIP712DomainChanged();

    /**
     * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
     * signature.
     */
    function eip712Domain()
        external
        view
        returns (
            bytes1 fields,
            string memory name,
            string memory version,
            uint256 chainId,
            address verifyingContract,
            bytes32 salt,
            uint256[] memory extensions
        );
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.20;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeacon {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {UpgradeableBeacon} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/ERC1967/ERC1967Utils.sol)

pragma solidity ^0.8.20;

import {IBeacon} from "../beacon/IBeacon.sol";
import {Address} from "../../utils/Address.sol";
import {StorageSlot} from "../../utils/StorageSlot.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 */
library ERC1967Utils {
    // We re-declare ERC-1967 events here because they can't be used directly from IERC1967.
    // This will be fixed in Solidity 0.8.21. At that point we should remove these events.
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev The `implementation` of the proxy is invalid.
     */
    error ERC1967InvalidImplementation(address implementation);

    /**
     * @dev The `admin` of the proxy is invalid.
     */
    error ERC1967InvalidAdmin(address admin);

    /**
     * @dev The `beacon` of the proxy is invalid.
     */
    error ERC1967InvalidBeacon(address beacon);

    /**
     * @dev An upgrade function sees `msg.value > 0` that may be lost.
     */
    error ERC1967NonPayable();

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

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        if (newImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(newImplementation);
        }
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Performs implementation upgrade with additional setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);

        if (data.length > 0) {
            Address.functionDelegateCall(newImplementation, data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using
     * the https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        if (newAdmin == address(0)) {
            revert ERC1967InvalidAdmin(address(0));
        }
        StorageSlot.getAddressSlot(ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {IERC1967-AdminChanged} event.
     */
    function changeAdmin(address newAdmin) internal {
        emit AdminChanged(getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is the keccak-256 hash of "eip1967.proxy.beacon" subtracted by 1.
     */
    // solhint-disable-next-line private-vars-leading-underscore
    bytes32 internal constant BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

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

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        if (newBeacon.code.length == 0) {
            revert ERC1967InvalidBeacon(newBeacon);
        }

        StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;

        address beaconImplementation = IBeacon(newBeacon).implementation();
        if (beaconImplementation.code.length == 0) {
            revert ERC1967InvalidImplementation(beaconImplementation);
        }
    }

    /**
     * @dev Change the beacon and trigger a setup call if data is nonempty.
     * This function is payable only if the setup call is performed, otherwise `msg.value` is rejected
     * to avoid stuck value in the contract.
     *
     * Emits an {IERC1967-BeaconUpgraded} event.
     *
     * CAUTION: Invoking this function has no effect on an instance of {BeaconProxy} since v5, since
     * it uses an immutable beacon without looking at the value of the ERC-1967 beacon slot for
     * efficiency.
     */
    function upgradeBeaconToAndCall(address newBeacon, bytes memory data) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);

        if (data.length > 0) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        } else {
            _checkNonPayable();
        }
    }

    /**
     * @dev Reverts if `msg.value` is not zero. It can be used to avoid `msg.value` stuck in the contract
     * if an upgrade doesn't perform an initialization call.
     */
    function _checkNonPayable() private {
        if (msg.value > 0) {
            revert ERC1967NonPayable();
        }
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     */
    function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) {
        unchecked {
            bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
            // We do not check for an overflow here since the shift operation results in 0 or 1.
            uint8 v = uint8((uint256(vs) >> 255) + 27);
            return tryRecover(hash, v, r, s);
        }
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     */
    function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError, bytes32) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS, s);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature, bytes32(0));
        }

        return (signer, RecoverError.NoError, bytes32(0));
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);
        _throwError(error, errorArg);
        return recovered;
    }

    /**
     * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
     */
    function _throwError(RecoverError error, bytes32 errorArg) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert ECDSAInvalidSignature();
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert ECDSAInvalidSignatureLength(uint256(errorArg));
        } else if (error == RecoverError.InvalidSignatureS) {
            revert ECDSAInvalidSignatureS(errorArg);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.20;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The tree and the proofs can be generated using our
 * https://github.com/OpenZeppelin/merkle-tree[JavaScript library].
 * You will find a quickstart guide in the readme.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the Merkle tree could be reinterpreted as a leaf value.
 * OpenZeppelin's JavaScript library generates Merkle trees that are safe
 * against this attack out of the box.
 */
library MerkleProof {
    /**
     *@dev The multiproof provided is not valid.
     */
    error MerkleProofInvalidMultiproof();

    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     */
    function verifyCalldata(bytes32[] calldata proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction
     * proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another
     * leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false
     * respectively.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree
     * is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the
     * tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer).
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofLen = proof.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proofLen != totalHashes + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            if (proofPos != proofLen) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}.
     *
     * CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details.
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuilds the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the Merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 proofLen = proof.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        if (leavesLen + proofLen != totalHashes + 1) {
            revert MerkleProofInvalidMultiproof();
        }

        // The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
        // `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
        bytes32[] memory hashes = new bytes32[](totalHashes);
        uint256 leafPos = 0;
        uint256 hashPos = 0;
        uint256 proofPos = 0;
        // At each step, we compute the next hash using two values:
        // - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
        //   get the next hash.
        // - depending on the flag, either another value from the "main queue" (merging branches) or an element from the
        //   `proof` array.
        for (uint256 i = 0; i < totalHashes; i++) {
            bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
            bytes32 b = proofFlags[i]
                ? (leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++])
                : proof[proofPos++];
            hashes[i] = _hashPair(a, b);
        }

        if (totalHashes > 0) {
            if (proofPos != proofLen) {
                revert MerkleProofInvalidMultiproof();
            }
            unchecked {
                return hashes[totalHashes - 1];
            }
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Sorts the pair (a, b) and hashes the result.
     */
    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    /**
     * @dev Implementation of keccak256(abi.encode(a, b)) that doesn't allocate or expand memory.
     */
    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol)

pragma solidity ^0.8.20;

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

/**
 * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.
 *
 * The library provides methods for generating a hash of a message that conforms to the
 * https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]
 * specifications.
 */
library MessageHashUtils {
    /**
     * @dev Returns the keccak256 digest of an EIP-191 signed data with version
     * `0x45` (`personal_sign` messages).
     *
     * The digest is calculated by prefixing a bytes32 `messageHash` with
     * `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the
     * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
     *
     * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with
     * keccak256, although any bytes32 value can be safely used because the final digest will
     * be re-hashed.
     *
     * See {ECDSA-recover}.
     */
    function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash
            mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix
            digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)
        }
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-191 signed data with version
     * `0x45` (`personal_sign` messages).
     *
     * The digest is calculated by prefixing an arbitrary `message` with
     * `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the
     * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
     *
     * See {ECDSA-recover}.
     */
    function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {
        return
            keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-191 signed data with version
     * `0x00` (data with intended validator).
     *
     * The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended
     * `validator` address. Then hashing the result.
     *
     * See {ECDSA-recover}.
     */
    function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked(hex"19_00", validator, data));
    }

    /**
     * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`).
     *
     * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
     * `\x19\x01` and hashing the result. It corresponds to the hash signed by the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
     *
     * See {ECDSA-recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, hex"19_01")
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            digest := keccak256(ptr, 0x42)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/SignatureChecker.sol)

pragma solidity ^0.8.20;

import {ECDSA} from "./ECDSA.sol";
import {IERC1271} from "../../interfaces/IERC1271.sol";

/**
 * @dev Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA
 * signatures from externally owned accounts (EOAs) as well as ERC1271 signatures from smart contract wallets like
 * Argent and Safe Wallet (previously Gnosis Safe).
 */
library SignatureChecker {
    /**
     * @dev Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the
     * signature is validated against that smart contract using ERC1271, otherwise it's validated using `ECDSA.recover`.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidSignatureNow(address signer, bytes32 hash, bytes memory signature) internal view returns (bool) {
        (address recovered, ECDSA.RecoverError error, ) = ECDSA.tryRecover(hash, signature);
        return
            (error == ECDSA.RecoverError.NoError && recovered == signer) ||
            isValidERC1271SignatureNow(signer, hash, signature);
    }

    /**
     * @dev Checks if a signature is valid for a given signer and data hash. The signature is validated
     * against the signer smart contract using ERC1271.
     *
     * NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus
     * change through time. It could return true at block N and false at block N+1 (or the opposite).
     */
    function isValidERC1271SignatureNow(
        address signer,
        bytes32 hash,
        bytes memory signature
    ) internal view returns (bool) {
        (bool success, bytes memory result) = signer.staticcall(
            abi.encodeCall(IERC1271.isValidSignature, (hash, signature))
        );
        return (success &&
            result.length >= 32 &&
            abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

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

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

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

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

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

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

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

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

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

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

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

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

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

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

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

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

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

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

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

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

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.20;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such an operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeCast {
    /**
     * @dev Value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);

    /**
     * @dev An int value doesn't fit in an uint of `bits` size.
     */
    error SafeCastOverflowedIntToUint(int256 value);

    /**
     * @dev Value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);

    /**
     * @dev An uint value doesn't fit in an int of `bits` size.
     */
    error SafeCastOverflowedUintToInt(uint256 value);

    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        if (value > type(uint248).max) {
            revert SafeCastOverflowedUintDowncast(248, value);
        }
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        if (value > type(uint240).max) {
            revert SafeCastOverflowedUintDowncast(240, value);
        }
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        if (value > type(uint232).max) {
            revert SafeCastOverflowedUintDowncast(232, value);
        }
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        if (value > type(uint224).max) {
            revert SafeCastOverflowedUintDowncast(224, value);
        }
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        if (value > type(uint216).max) {
            revert SafeCastOverflowedUintDowncast(216, value);
        }
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        if (value > type(uint208).max) {
            revert SafeCastOverflowedUintDowncast(208, value);
        }
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        if (value > type(uint200).max) {
            revert SafeCastOverflowedUintDowncast(200, value);
        }
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        if (value > type(uint192).max) {
            revert SafeCastOverflowedUintDowncast(192, value);
        }
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        if (value > type(uint184).max) {
            revert SafeCastOverflowedUintDowncast(184, value);
        }
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        if (value > type(uint176).max) {
            revert SafeCastOverflowedUintDowncast(176, value);
        }
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        if (value > type(uint168).max) {
            revert SafeCastOverflowedUintDowncast(168, value);
        }
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        if (value > type(uint160).max) {
            revert SafeCastOverflowedUintDowncast(160, value);
        }
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        if (value > type(uint152).max) {
            revert SafeCastOverflowedUintDowncast(152, value);
        }
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        if (value > type(uint144).max) {
            revert SafeCastOverflowedUintDowncast(144, value);
        }
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        if (value > type(uint136).max) {
            revert SafeCastOverflowedUintDowncast(136, value);
        }
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        if (value > type(uint128).max) {
            revert SafeCastOverflowedUintDowncast(128, value);
        }
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        if (value > type(uint120).max) {
            revert SafeCastOverflowedUintDowncast(120, value);
        }
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        if (value > type(uint112).max) {
            revert SafeCastOverflowedUintDowncast(112, value);
        }
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        if (value > type(uint104).max) {
            revert SafeCastOverflowedUintDowncast(104, value);
        }
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        if (value > type(uint96).max) {
            revert SafeCastOverflowedUintDowncast(96, value);
        }
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        if (value > type(uint88).max) {
            revert SafeCastOverflowedUintDowncast(88, value);
        }
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        if (value > type(uint80).max) {
            revert SafeCastOverflowedUintDowncast(80, value);
        }
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        if (value > type(uint72).max) {
            revert SafeCastOverflowedUintDowncast(72, value);
        }
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        if (value > type(uint64).max) {
            revert SafeCastOverflowedUintDowncast(64, value);
        }
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        if (value > type(uint56).max) {
            revert SafeCastOverflowedUintDowncast(56, value);
        }
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        if (value > type(uint48).max) {
            revert SafeCastOverflowedUintDowncast(48, value);
        }
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        if (value > type(uint40).max) {
            revert SafeCastOverflowedUintDowncast(40, value);
        }
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        if (value > type(uint32).max) {
            revert SafeCastOverflowedUintDowncast(32, value);
        }
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        if (value > type(uint24).max) {
            revert SafeCastOverflowedUintDowncast(24, value);
        }
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        if (value > type(uint16).max) {
            revert SafeCastOverflowedUintDowncast(16, value);
        }
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        if (value > type(uint8).max) {
            revert SafeCastOverflowedUintDowncast(8, value);
        }
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        if (value < 0) {
            revert SafeCastOverflowedIntToUint(value);
        }
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(248, value);
        }
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(240, value);
        }
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(232, value);
        }
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(224, value);
        }
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(216, value);
        }
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(208, value);
        }
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(200, value);
        }
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(192, value);
        }
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(184, value);
        }
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(176, value);
        }
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(168, value);
        }
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(160, value);
        }
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(152, value);
        }
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(144, value);
        }
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(136, value);
        }
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(128, value);
        }
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(120, value);
        }
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(112, value);
        }
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(104, value);
        }
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(96, value);
        }
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(88, value);
        }
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(80, value);
        }
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(72, value);
        }
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(64, value);
        }
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(56, value);
        }
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(48, value);
        }
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(40, value);
        }
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(32, value);
        }
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(24, value);
        }
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(16, value);
        }
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        if (downcasted != value) {
            revert SafeCastOverflowedIntDowncast(8, value);
        }
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        if (value > uint256(type(int256).max)) {
            revert SafeCastOverflowedUintToInt(value);
        }
        return int256(value);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.20;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```solidity
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(newImplementation.code.length > 0);
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` with member `value` located at `slot`.
     */
    function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `StringSlot` representation of the string storage pointer `store`.
     */
    function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` with member `value` located at `slot`.
     */
    function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
     */
    function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := store.slot
        }
    }
}

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

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

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

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

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

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

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later

pragma solidity ^0.8.22;

import '../interfaces/IMulticall.sol';

/**
 * @title Multicall
 * @author Uniswap
 * @notice Adopted from https://github.com/Uniswap/v3-periphery/blob/1d69caf0d6c8cfeae9acd1f34ead30018d6e6400/contracts/base/Multicall.sol
 * @notice Enables calling multiple methods in a single call to the contract
 */
abstract contract Multicall is IMulticall {
  /// @inheritdoc IMulticall
  function multicall(bytes[] calldata data) external override returns (bytes[] memory results) {
    uint256 dataLength = data.length;
    results = new bytes[](dataLength);
    for (uint256 i = 0; i < dataLength; i++) {
      (bool success, bytes memory result) = address(this).delegatecall(data[i]);

      if (!success) {
        // Next 5 lines from https://ethereum.stackexchange.com/a/83577
        if (result.length < 68) revert();
        assembly {
          result := add(result, 0x04)
        }
        revert(abi.decode(result, (string)));
      }

      results[i] = result;
    }
  }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperValidators} from './IKeeperValidators.sol';
import {IKeeperRewards} from './IKeeperRewards.sol';
import {IMulticall} from './IMulticall.sol';

/**
 * @title IDepositDataRegistry
 * @author StakeWise
 * @notice Defines the interface for DepositDataRegistry
 */
interface IDepositDataRegistry is IMulticall {
  /**
   * @notice Event emitted on deposit data manager update
   * @param vault The address of the vault
   * @param depositDataManager The address of the new deposit data manager
   */
  event DepositDataManagerUpdated(address indexed vault, address depositDataManager);

  /**
   * @notice Event emitted on deposit data root update
   * @param vault The address of the vault
   * @param depositDataRoot The new deposit data Merkle tree root
   */
  event DepositDataRootUpdated(address indexed vault, bytes32 depositDataRoot);

  /**
   * @notice Event emitted on deposit data migration
   * @param vault The address of the vault
   * @param depositDataRoot The deposit data root
   * @param validatorIndex The index of the next validator to be registered
   * @param depositDataManager The address of the deposit data manager
   */
  event DepositDataMigrated(
    address indexed vault,
    bytes32 depositDataRoot,
    uint256 validatorIndex,
    address depositDataManager
  );

  /**
   * @notice The vault deposit data index
   * @param vault The address of the vault
   * @return validatorIndex The index of the next validator to be registered
   */
  function depositDataIndexes(address vault) external view returns (uint256 validatorIndex);

  /**
   * @notice The vault deposit data root
   * @param vault The address of the vault
   * @return depositDataRoot The deposit data root
   */
  function depositDataRoots(address vault) external view returns (bytes32 depositDataRoot);

  /**
   * @notice The vault deposit data manager. Defaults to the vault admin if not set.
   * @param vault The address of the vault
   * @return depositDataManager The address of the deposit data manager
   */
  function getDepositDataManager(address vault) external view returns (address);

  /**
   * @notice Function for setting the deposit data manager for the vault. Can only be called by the vault admin.
   * @param vault The address of the vault
   * @param depositDataManager The address of the new deposit data manager
   */
  function setDepositDataManager(address vault, address depositDataManager) external;

  /**
   * @notice Function for setting the deposit data root for the vault. Can only be called by the deposit data manager.
   * @param vault The address of the vault
   * @param depositDataRoot The new deposit data Merkle tree root
   */
  function setDepositDataRoot(address vault, bytes32 depositDataRoot) external;

  /**
   * @notice Updates the vault state. Can be used in multicall to update state and register validator(s).
   * @param vault The address of the vault
   * @param harvestParams The harvest params to use for updating the vault state
   */
  function updateVaultState(
    address vault,
    IKeeperRewards.HarvestParams calldata harvestParams
  ) external;

  /**
   * @notice Function for registering single validator
   * @param vault The address of the vault
   * @param keeperParams The parameters for getting approval from Keeper oracles
   * @param proof The proof used to verify that the validator is part of the deposit data merkle tree
   */
  function registerValidator(
    address vault,
    IKeeperValidators.ApprovalParams calldata keeperParams,
    bytes32[] calldata proof
  ) external;

  /**
   * @notice Function for registering multiple validators
   * @param vault The address of the vault
   * @param keeperParams The parameters for getting approval from Keeper oracles
   * @param indexes The indexes of the leaves for the merkle tree multi proof verification
   * @param proofFlags The multi proof flags for the merkle tree verification
   * @param proof The proof used for the merkle tree verification
   */
  function registerValidators(
    address vault,
    IKeeperValidators.ApprovalParams calldata keeperParams,
    uint256[] calldata indexes,
    bool[] calldata proofFlags,
    bytes32[] calldata proof
  ) external;

  /**
   * @notice Function for migrating the deposit data of the Vault. Can only be called once by a vault during an upgrade.
   * @param depositDataRoot The current deposit data root
   * @param validatorIndex The current index of the next validator to be registered
   * @param depositDataManager The address of the deposit data manager
   */
  function migrate(
    bytes32 depositDataRoot,
    uint256 validatorIndex,
    address depositDataManager
  ) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultWhitelist} from './IVaultWhitelist.sol';
import {IEthVault} from './IEthVault.sol';

/**
 * @title IEthPrivVault
 * @author StakeWise
 * @notice Defines the interface for the EthPrivVault contract
 */
interface IEthPrivVault is IEthVault, IVaultWhitelist {}

// SPDX-License-Identifier: CC0-1.0

pragma solidity ^0.8.22;

import {IValidatorsRegistry} from './IValidatorsRegistry.sol';

/**
 * @title IEthValidatorsRegistry
 * @author Ethereum Foundation
 * @notice This is the Ethereum validators deposit contract interface.
 *         See https://github.com/ethereum/consensus-specs/blob/v1.2.0/solidity_deposit_contract/deposit_contract.sol.
 *         For more information see the Phase 0 specification under https://github.com/ethereum/consensus-specs.
 */
interface IEthValidatorsRegistry is IValidatorsRegistry {
  /// @notice Submit a Phase 0 DepositData object.
  /// @param pubkey A BLS12-381 public key.
  /// @param withdrawal_credentials Commitment to a public key for withdrawals.
  /// @param signature A BLS12-381 signature.
  /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.
  /// Used as a protection against malformed input.
  function deposit(
    bytes calldata pubkey,
    bytes calldata withdrawal_credentials,
    bytes calldata signature,
    bytes32 deposit_data_root
  ) external payable;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperRewards} from './IKeeperRewards.sol';
import {IVaultAdmin} from './IVaultAdmin.sol';
import {IVaultVersion} from './IVaultVersion.sol';
import {IVaultFee} from './IVaultFee.sol';
import {IVaultState} from './IVaultState.sol';
import {IVaultValidators} from './IVaultValidators.sol';
import {IVaultEnterExit} from './IVaultEnterExit.sol';
import {IVaultOsToken} from './IVaultOsToken.sol';
import {IVaultMev} from './IVaultMev.sol';
import {IVaultEthStaking} from './IVaultEthStaking.sol';
import {IMulticall} from './IMulticall.sol';

/**
 * @title IEthVault
 * @author StakeWise
 * @notice Defines the interface for the EthVault contract
 */
interface IEthVault is
  IVaultAdmin,
  IVaultVersion,
  IVaultFee,
  IVaultState,
  IVaultValidators,
  IVaultEnterExit,
  IVaultOsToken,
  IVaultMev,
  IVaultEthStaking,
  IMulticall
{
  /**
   * @dev Struct for initializing the EthVault contract
   * @param capacity The Vault stops accepting deposits after exceeding the capacity
   * @param feePercent The fee percent that is charged by the Vault
   * @param metadataIpfsHash The IPFS hash of the Vault's metadata file
   */
  struct EthVaultInitParams {
    uint256 capacity;
    uint16 feePercent;
    string metadataIpfsHash;
  }

  /**
   * @notice Initializes or upgrades the EthVault contract. Must transfer security deposit during the deployment.
   * @param params The encoded parameters for initializing the EthVault contract
   */
  function initialize(bytes calldata params) external payable;

  /**
   * @notice Deposits assets to the vault and mints OsToken shares to the receiver
   * @param receiver The address to receive the OsToken
   * @param osTokenShares The amount of OsToken shares to mint.
   *        If set to type(uint256).max, max OsToken shares will be minted based on the deposited amount.
   * @param referrer The address of the referrer
   * @return The amount of OsToken shares minted
   */
  function depositAndMintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer
  ) external payable returns (uint256);

  /**
   * @notice Updates the state, deposits assets to the vault and mints OsToken shares to the receiver
   * @param receiver The address to receive the OsToken
   * @param osTokenShares The amount of OsToken shares to mint.
   *        If set to type(uint256).max, max OsToken shares will be minted based on the deposited amount.
   * @param referrer The address of the referrer
   * @param harvestParams The parameters for the harvest
   * @return The amount of OsToken shares minted
   */
  function updateStateAndDepositAndMintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer,
    IKeeperRewards.HarvestParams calldata harvestParams
  ) external payable returns (uint256);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title IEthVaultFactory
 * @author StakeWise
 * @notice Defines the interface for the ETH Vault Factory contract
 */
interface IEthVaultFactory {
  /**
   * @notice Event emitted on a Vault creation
   * @param admin The address of the Vault admin
   * @param vault The address of the created Vault
   * @param ownMevEscrow The address of the own MEV escrow contract. Zero address if shared MEV escrow is used.
   * @param params The encoded parameters for initializing the Vault contract
   */
  event VaultCreated(
    address indexed admin,
    address indexed vault,
    address ownMevEscrow,
    bytes params
  );

  /**
   * @notice The address of the Vault implementation contract used for proxy creation
   * @return The address of the Vault implementation contract
   */
  function implementation() external view returns (address);

  /**
   * @notice The address of the own MEV escrow contract used for Vault creation
   * @return The address of the MEV escrow contract
   */
  function ownMevEscrow() external view returns (address);

  /**
   * @notice The address of the Vault admin used for Vault creation
   * @return The address of the Vault admin
   */
  function vaultAdmin() external view returns (address);

  /**
   * @notice Create Vault. Must transfer security deposit together with a call.
   * @param params The encoded parameters for initializing the Vault contract
   * @param isOwnMevEscrow Whether to deploy own escrow contract or connect to a smoothing pool for priority fees and MEV rewards
   * @return vault The address of the created Vault
   */
  function createVault(
    bytes calldata params,
    bool isOwnMevEscrow
  ) external payable returns (address vault);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IERC5267} from '@openzeppelin/contracts/interfaces/IERC5267.sol';

/**
 * @title IKeeperOracles
 * @author StakeWise
 * @notice Defines the interface for the KeeperOracles contract
 */
interface IKeeperOracles is IERC5267 {
  /**
   * @notice Event emitted on the oracle addition
   * @param oracle The address of the added oracle
   */
  event OracleAdded(address indexed oracle);

  /**
   * @notice Event emitted on the oracle removal
   * @param oracle The address of the removed oracle
   */
  event OracleRemoved(address indexed oracle);

  /**
   * @notice Event emitted on oracles config update
   * @param configIpfsHash The IPFS hash of the new config
   */
  event ConfigUpdated(string configIpfsHash);

  /**
   * @notice Function for verifying whether oracle is registered or not
   * @param oracle The address of the oracle to check
   * @return `true` for the registered oracle, `false` otherwise
   */
  function isOracle(address oracle) external view returns (bool);

  /**
   * @notice Total Oracles
   * @return The total number of oracles registered
   */
  function totalOracles() external view returns (uint256);

  /**
   * @notice Function for adding oracle to the set
   * @param oracle The address of the oracle to add
   */
  function addOracle(address oracle) external;

  /**
   * @notice Function for removing oracle from the set
   * @param oracle The address of the oracle to remove
   */
  function removeOracle(address oracle) external;

  /**
   * @notice Function for updating the config IPFS hash
   * @param configIpfsHash The new config IPFS hash
   */
  function updateConfig(string calldata configIpfsHash) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperOracles} from './IKeeperOracles.sol';

/**
 * @title IKeeperRewards
 * @author StakeWise
 * @notice Defines the interface for the Keeper contract rewards
 */
interface IKeeperRewards is IKeeperOracles {
  /**
   * @notice Event emitted on rewards update
   * @param caller The address of the function caller
   * @param rewardsRoot The new rewards merkle tree root
   * @param avgRewardPerSecond The new average reward per second
   * @param updateTimestamp The update timestamp used for rewards calculation
   * @param nonce The nonce used for verifying signatures
   * @param rewardsIpfsHash The new rewards IPFS hash
   */
  event RewardsUpdated(
    address indexed caller,
    bytes32 indexed rewardsRoot,
    uint256 avgRewardPerSecond,
    uint64 updateTimestamp,
    uint64 nonce,
    string rewardsIpfsHash
  );

  /**
   * @notice Event emitted on Vault harvest
   * @param vault The address of the Vault
   * @param rewardsRoot The rewards merkle tree root
   * @param totalAssetsDelta The Vault total assets delta since last sync. Can be negative in case of penalty/slashing.
   * @param unlockedMevDelta The Vault execution reward that can be withdrawn from shared MEV escrow. Only used by shared MEV Vaults.
   */
  event Harvested(
    address indexed vault,
    bytes32 indexed rewardsRoot,
    int256 totalAssetsDelta,
    uint256 unlockedMevDelta
  );

  /**
   * @notice Event emitted on rewards min oracles number update
   * @param oracles The new minimum number of oracles required to update rewards
   */
  event RewardsMinOraclesUpdated(uint256 oracles);

  /**
   * @notice A struct containing the last synced Vault's cumulative reward
   * @param assets The Vault cumulative reward earned since the start. Can be negative in case of penalty/slashing.
   * @param nonce The nonce of the last sync
   */
  struct Reward {
    int192 assets;
    uint64 nonce;
  }

  /**
   * @notice A struct containing the last unlocked Vault's cumulative execution reward that can be withdrawn from shared MEV escrow. Only used by shared MEV Vaults.
   * @param assets The shared MEV Vault's cumulative execution reward that can be withdrawn
   * @param nonce The nonce of the last sync
   */
  struct UnlockedMevReward {
    uint192 assets;
    uint64 nonce;
  }

  /**
   * @notice A struct containing parameters for rewards update
   * @param rewardsRoot The new rewards merkle root
   * @param avgRewardPerSecond The new average reward per second
   * @param updateTimestamp The update timestamp used for rewards calculation
   * @param rewardsIpfsHash The new IPFS hash with all the Vaults' rewards for the new root
   * @param signatures The concatenation of the Oracles' signatures
   */
  struct RewardsUpdateParams {
    bytes32 rewardsRoot;
    uint256 avgRewardPerSecond;
    uint64 updateTimestamp;
    string rewardsIpfsHash;
    bytes signatures;
  }

  /**
   * @notice A struct containing parameters for harvesting rewards. Can only be called by Vault.
   * @param rewardsRoot The rewards merkle root
   * @param reward The Vault cumulative reward earned since the start. Can be negative in case of penalty/slashing.
   * @param unlockedMevReward The Vault cumulative execution reward that can be withdrawn from shared MEV escrow. Only used by shared MEV Vaults.
   * @param proof The proof to verify that Vault's reward is correct
   */
  struct HarvestParams {
    bytes32 rewardsRoot;
    int160 reward;
    uint160 unlockedMevReward;
    bytes32[] proof;
  }

  /**
   * @notice Previous Rewards Root
   * @return The previous merkle tree root of the rewards accumulated by the Vaults
   */
  function prevRewardsRoot() external view returns (bytes32);

  /**
   * @notice Rewards Root
   * @return The latest merkle tree root of the rewards accumulated by the Vaults
   */
  function rewardsRoot() external view returns (bytes32);

  /**
   * @notice Rewards Nonce
   * @return The nonce used for updating rewards merkle tree root
   */
  function rewardsNonce() external view returns (uint64);

  /**
   * @notice The last rewards update
   * @return The timestamp of the last rewards update
   */
  function lastRewardsTimestamp() external view returns (uint64);

  /**
   * @notice The minimum number of oracles required to update rewards
   * @return The minimum number of oracles
   */
  function rewardsMinOracles() external view returns (uint256);

  /**
   * @notice The rewards delay
   * @return The delay in seconds between rewards updates
   */
  function rewardsDelay() external view returns (uint256);

  /**
   * @notice Get last synced Vault cumulative reward
   * @param vault The address of the Vault
   * @return assets The last synced reward assets
   * @return nonce The last synced reward nonce
   */
  function rewards(address vault) external view returns (int192 assets, uint64 nonce);

  /**
   * @notice Get last unlocked shared MEV Vault cumulative reward
   * @param vault The address of the Vault
   * @return assets The last synced reward assets
   * @return nonce The last synced reward nonce
   */
  function unlockedMevRewards(address vault) external view returns (uint192 assets, uint64 nonce);

  /**
   * @notice Checks whether Vault must be harvested
   * @param vault The address of the Vault
   * @return `true` if the Vault requires harvesting, `false` otherwise
   */
  function isHarvestRequired(address vault) external view returns (bool);

  /**
   * @notice Checks whether the Vault can be harvested
   * @param vault The address of the Vault
   * @return `true` if Vault can be harvested, `false` otherwise
   */
  function canHarvest(address vault) external view returns (bool);

  /**
   * @notice Checks whether rewards can be updated
   * @return `true` if rewards can be updated, `false` otherwise
   */
  function canUpdateRewards() external view returns (bool);

  /**
   * @notice Checks whether the Vault has registered validators
   * @param vault The address of the Vault
   * @return `true` if Vault is collateralized, `false` otherwise
   */
  function isCollateralized(address vault) external view returns (bool);

  /**
   * @notice Update rewards data
   * @param params The struct containing rewards update parameters
   */
  function updateRewards(RewardsUpdateParams calldata params) external;

  /**
   * @notice Harvest rewards. Can be called only by Vault.
   * @param params The struct containing rewards harvesting parameters
   * @return totalAssetsDelta The total reward/penalty accumulated by the Vault since the last sync
   * @return unlockedMevDelta The Vault execution reward that can be withdrawn from shared MEV escrow. Only used by shared MEV Vaults.
   * @return harvested `true` when the rewards were harvested, `false` otherwise
   */
  function harvest(
    HarvestParams calldata params
  ) external returns (int256 totalAssetsDelta, uint256 unlockedMevDelta, bool harvested);

  /**
   * @notice Set min number of oracles for confirming rewards update. Can only be called by the owner.
   * @param _rewardsMinOracles The new min number of oracles for confirming rewards update
   */
  function setRewardsMinOracles(uint256 _rewardsMinOracles) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperRewards} from './IKeeperRewards.sol';
import {IKeeperOracles} from './IKeeperOracles.sol';

/**
 * @title IKeeperValidators
 * @author StakeWise
 * @notice Defines the interface for the Keeper validators
 */
interface IKeeperValidators is IKeeperOracles, IKeeperRewards {
  /**
   * @notice Event emitted on validators approval
   * @param vault The address of the Vault
   * @param exitSignaturesIpfsHash The IPFS hash with the validators' exit signatures
   */
  event ValidatorsApproval(address indexed vault, string exitSignaturesIpfsHash);

  /**
   * @notice Event emitted on exit signatures update
   * @param caller The address of the function caller
   * @param vault The address of the Vault
   * @param nonce The nonce used for verifying Oracles' signatures
   * @param exitSignaturesIpfsHash The IPFS hash with the validators' exit signatures
   */
  event ExitSignaturesUpdated(
    address indexed caller,
    address indexed vault,
    uint256 nonce,
    string exitSignaturesIpfsHash
  );

  /**
   * @notice Event emitted on validators min oracles number update
   * @param oracles The new minimum number of oracles required to approve validators
   */
  event ValidatorsMinOraclesUpdated(uint256 oracles);

  /**
   * @notice Get nonce for the next vault exit signatures update
   * @param vault The address of the Vault to get the nonce for
   * @return The nonce of the Vault for updating signatures
   */
  function exitSignaturesNonces(address vault) external view returns (uint256);

  /**
   * @notice Struct for approving registration of one or more validators
   * @param validatorsRegistryRoot The deposit data root used to verify that oracles approved validators
   * @param deadline The deadline for submitting the approval
   * @param validators The concatenation of the validators' public key, signature and deposit data root
   * @param signatures The concatenation of Oracles' signatures
   * @param exitSignaturesIpfsHash The IPFS hash with the validators' exit signatures
   */
  struct ApprovalParams {
    bytes32 validatorsRegistryRoot;
    uint256 deadline;
    bytes validators;
    bytes signatures;
    string exitSignaturesIpfsHash;
  }

  /**
   * @notice The minimum number of oracles required to update validators
   * @return The minimum number of oracles
   */
  function validatorsMinOracles() external view returns (uint256);

  /**
   * @notice Function for approving validators registration
   * @param params The parameters for approving validators registration
   */
  function approveValidators(ApprovalParams calldata params) external;

  /**
   * @notice Function for updating exit signatures for every hard fork
   * @param vault The address of the Vault to update signatures for
   * @param deadline The deadline for submitting signatures update
   * @param exitSignaturesIpfsHash The IPFS hash with the validators' exit signatures
   * @param oraclesSignatures The concatenation of Oracles' signatures
   */
  function updateExitSignatures(
    address vault,
    uint256 deadline,
    string calldata exitSignaturesIpfsHash,
    bytes calldata oraclesSignatures
  ) external;

  /**
   * @notice Function for updating validators min oracles number
   * @param _validatorsMinOracles The new minimum number of oracles required to approve validators
   */
  function setValidatorsMinOracles(uint256 _validatorsMinOracles) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later

pragma solidity ^0.8.22;

/**
 * @title Multicall
 * @author Uniswap
 * @notice Adopted from https://github.com/Uniswap/v3-periphery/blob/1d69caf0d6c8cfeae9acd1f34ead30018d6e6400/contracts/base/Multicall.sol
 * @notice Enables calling multiple methods in a single call to the contract
 */
interface IMulticall {
  /**
   * @notice Call multiple functions in the current contract and return the data from all of them if they all succeed
   * @param data The encoded function data for each of the calls to make to this contract
   * @return results The results from each of the calls passed in via data
   */
  function multicall(bytes[] calldata data) external returns (bytes[] memory results);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title IOsTokenConfig
 * @author StakeWise
 * @notice Defines the interface for the OsTokenConfig contract
 */
interface IOsTokenConfig {
  /**
   * @notice Emitted when OsToken minting and liquidating configuration values are updated
   * @param vault The address of the vault to update the config for. Will be zero address if it is a default config.
   * @param liqBonusPercent The new liquidation bonus percent value
   * @param liqThresholdPercent The new liquidation threshold percent value
   * @param ltvPercent The new loan-to-value (LTV) percent value
   */
  event OsTokenConfigUpdated(
    address vault,
    uint128 liqBonusPercent,
    uint64 liqThresholdPercent,
    uint64 ltvPercent
  );

  /**
   * @notice Emitted when the OsToken redeemer address is updated
   * @param newRedeemer The address of the new redeemer
   */
  event RedeemerUpdated(address newRedeemer);

  /**
   * @notice The OsToken minting and liquidating configuration values
   * @param liqThresholdPercent The liquidation threshold percent used to calculate health factor for OsToken position
   * @param liqBonusPercent The minimal bonus percent that liquidator earns on OsToken position liquidation
   * @param ltvPercent The percent used to calculate how much user can mint OsToken shares
   */
  struct Config {
    uint128 liqBonusPercent;
    uint64 liqThresholdPercent;
    uint64 ltvPercent;
  }

  /**
   * @notice The address of the OsToken redeemer
   * @return The address of the redeemer
   */
  function redeemer() external view returns (address);

  /**
   * @notice Returns the OsToken minting and liquidating configuration values for the vault
   * @param vault The address of the vault to get the config for
   * @return config The OsToken config for the vault
   */
  function getConfig(address vault) external view returns (Config memory config);

  /**
   * @notice Sets the OsToken redeemer address. Can only be called by the owner.
   * @param newRedeemer The address of the new redeemer
   */
  function setRedeemer(address newRedeemer) external;

  /**
   * @notice Updates the OsToken minting and liquidating configuration values. Can only be called by the owner.
   * @param vault The address of the vault. Set to zero address to update the default config.
   * @param config The new OsToken configuration
   */
  function updateConfig(address vault, Config memory config) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title IOsTokenVaultController
 * @author StakeWise
 * @notice Defines the interface for the OsTokenVaultController contract
 */
interface IOsTokenVaultController {
  /**
   * @notice Event emitted on minting shares
   * @param vault The address of the Vault
   * @param receiver The address that received the shares
   * @param assets The number of assets collateralized
   * @param shares The number of tokens the owner received
   */
  event Mint(address indexed vault, address indexed receiver, uint256 assets, uint256 shares);

  /**
   * @notice Event emitted on burning shares
   * @param vault The address of the Vault
   * @param owner The address that owns the shares
   * @param assets The total number of assets withdrawn
   * @param shares The total number of shares burned
   */
  event Burn(address indexed vault, address indexed owner, uint256 assets, uint256 shares);

  /**
   * @notice Event emitted on state update
   * @param profitAccrued The profit accrued since the last update
   * @param treasuryShares The number of shares minted for the treasury
   * @param treasuryAssets The number of assets minted for the treasury
   */
  event StateUpdated(uint256 profitAccrued, uint256 treasuryShares, uint256 treasuryAssets);

  /**
   * @notice Event emitted on capacity update
   * @param capacity The amount after which the OsToken stops accepting deposits
   */
  event CapacityUpdated(uint256 capacity);

  /**
   * @notice Event emitted on treasury address update
   * @param treasury The new treasury address
   */
  event TreasuryUpdated(address indexed treasury);

  /**
   * @notice Event emitted on fee percent update
   * @param feePercent The new fee percent
   */
  event FeePercentUpdated(uint16 feePercent);

  /**
   * @notice Event emitted on average reward per second update
   * @param avgRewardPerSecond The new average reward per second
   */
  event AvgRewardPerSecondUpdated(uint256 avgRewardPerSecond);

  /**
   * @notice Event emitted on keeper address update
   * @param keeper The new keeper address
   */
  event KeeperUpdated(address keeper);

  /**
   * @notice The OsToken capacity
   * @return The amount after which the OsToken stops accepting deposits
   */
  function capacity() external view returns (uint256);

  /**
   * @notice The DAO treasury address that receives OsToken fees
   * @return The address of the treasury
   */
  function treasury() external view returns (address);

  /**
   * @notice The fee percent (multiplied by 100)
   * @return The fee percent applied by the OsToken on the rewards
   */
  function feePercent() external view returns (uint64);

  /**
   * @notice The address that can update avgRewardPerSecond
   * @return The address of the keeper contract
   */
  function keeper() external view returns (address);

  /**
   * @notice The average reward per second used to mint OsToken rewards
   * @return The average reward per second earned by the Vaults
   */
  function avgRewardPerSecond() external view returns (uint256);

  /**
   * @notice The fee per share used for calculating the fee for every position
   * @return The cumulative fee per share
   */
  function cumulativeFeePerShare() external view returns (uint256);

  /**
   * @notice The total number of shares controlled by the OsToken
   * @return The total number of shares
   */
  function totalShares() external view returns (uint256);

  /**
   * @notice Total assets controlled by the OsToken
   * @return The total amount of the underlying asset that is "managed" by OsToken
   */
  function totalAssets() external view returns (uint256);

  /**
   * @notice Converts shares to assets
   * @param assets The amount of assets to convert to shares
   * @return shares The amount of shares that the OsToken would exchange for the amount of assets provided
   */
  function convertToShares(uint256 assets) external view returns (uint256 shares);

  /**
   * @notice Converts assets to shares
   * @param shares The amount of shares to convert to assets
   * @return assets The amount of assets that the OsToken would exchange for the amount of shares provided
   */
  function convertToAssets(uint256 shares) external view returns (uint256 assets);

  /**
   * @notice Updates rewards and treasury fee checkpoint for the OsToken
   */
  function updateState() external;

  /**
   * @notice Mint OsToken shares. Can only be called by the registered vault.
   * @param receiver The address that will receive the shares
   * @param shares The amount of shares to mint
   * @return assets The amount of assets minted
   */
  function mintShares(address receiver, uint256 shares) external returns (uint256 assets);

  /**
   * @notice Burn shares for withdrawn assets. Can only be called by the registered vault.
   * @param owner The address that owns the shares
   * @param shares The amount of shares to burn
   * @return assets The amount of assets withdrawn
   */
  function burnShares(address owner, uint256 shares) external returns (uint256 assets);

  /**
   * @notice Update treasury address. Can only be called by the owner.
   * @param _treasury The new treasury address
   */
  function setTreasury(address _treasury) external;

  /**
   * @notice Update capacity. Can only be called by the owner.
   * @param _capacity The amount after which the OsToken stops accepting deposits
   */
  function setCapacity(uint256 _capacity) external;

  /**
   * @notice Update fee percent. Can only be called by the owner. Cannot be larger than 10 000 (100%).
   * @param _feePercent The new fee percent
   */
  function setFeePercent(uint16 _feePercent) external;

  /**
   * @notice Update keeper address. Can only be called by the owner.
   * @param _keeper The new keeper address
   */
  function setKeeper(address _keeper) external;

  /**
   * @notice Updates average reward per second. Can only be called by the keeper.
   * @param _avgRewardPerSecond The new average reward per second
   */
  function setAvgRewardPerSecond(uint256 _avgRewardPerSecond) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title IOwnMevEscrow
 * @author StakeWise
 * @notice Defines the interface for the OwnMevEscrow contract
 */
interface IOwnMevEscrow {
  /**
   * @notice Event emitted on received MEV
   * @param assets The amount of MEV assets received
   */
  event MevReceived(uint256 assets);

  /**
   * @notice Event emitted on harvest
   * @param assets The amount of assets withdrawn
   */
  event Harvested(uint256 assets);

  /**
   * @notice Vault address
   * @return The address of the vault that owns the escrow
   */
  function vault() external view returns (address payable);

  /**
   * @notice Withdraws MEV accumulated in the escrow. Can be called only by the Vault.
   * @dev IMPORTANT: because control is transferred to the Vault, care must be
   *    taken to not create reentrancy vulnerabilities. The Vault must follow the checks-effects-interactions pattern:
   *    https://docs.soliditylang.org/en/v0.8.22/security-considerations.html#use-the-checks-effects-interactions-pattern
   * @return assets The amount of assets withdrawn
   */
  function harvest() external returns (uint256 assets);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title ISharedMevEscrow
 * @author StakeWise
 * @notice Defines the interface for the SharedMevEscrow contract
 */
interface ISharedMevEscrow {
  /**
   * @notice Event emitted on received MEV
   * @param assets The amount of MEV assets received
   */
  event MevReceived(uint256 assets);

  /**
   * @notice Event emitted on harvest
   * @param caller The function caller
   * @param assets The amount of assets withdrawn
   */
  event Harvested(address indexed caller, uint256 assets);

  /**
   * @notice Withdraws MEV accumulated in the escrow. Can be called only by the Vault.
   * @dev IMPORTANT: because control is transferred to the Vault, care must be
   *    taken to not create reentrancy vulnerabilities. The Vault must follow the checks-effects-interactions pattern:
   *    https://docs.soliditylang.org/en/v0.8.22/security-considerations.html#use-the-checks-effects-interactions-pattern
   * @param assets The amount of assets to withdraw
   */
  function harvest(uint256 assets) external;
}

// SPDX-License-Identifier: CC0-1.0

pragma solidity ^0.8.22;

/**
 * @title IValidatorsRegistry
 * @author Ethereum Foundation
 * @notice The validators deposit contract common interface
 */
interface IValidatorsRegistry {
  /// @notice A processed deposit event.
  event DepositEvent(
    bytes pubkey,
    bytes withdrawal_credentials,
    bytes amount,
    bytes signature,
    bytes index
  );

  /// @notice Query the current deposit root hash.
  /// @return The deposit root hash.
  function get_deposit_root() external view returns (bytes32);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title IVaultState
 * @author StakeWise
 * @notice Defines the interface for the VaultAdmin contract
 */
interface IVaultAdmin {
  /**
   * @notice Event emitted on metadata ipfs hash update
   * @param caller The address of the function caller
   * @param metadataIpfsHash The new metadata IPFS hash
   */
  event MetadataUpdated(address indexed caller, string metadataIpfsHash);

  /**
   * @notice The Vault admin
   * @return The address of the Vault admin
   */
  function admin() external view returns (address);

  /**
   * @notice Function for updating the metadata IPFS hash. Can only be called by Vault admin.
   * @param metadataIpfsHash The new metadata IPFS hash
   */
  function setMetadata(string calldata metadataIpfsHash) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultState} from './IVaultState.sol';

/**
 * @title IVaultEnterExit
 * @author StakeWise
 * @notice Defines the interface for the VaultEnterExit contract
 */
interface IVaultEnterExit is IVaultState {
  /**
   * @notice Event emitted on deposit
   * @param caller The address that called the deposit function
   * @param receiver The address that received the shares
   * @param assets The number of assets deposited by the caller
   * @param shares The number of shares received
   * @param referrer The address of the referrer
   */
  event Deposited(
    address indexed caller,
    address indexed receiver,
    uint256 assets,
    uint256 shares,
    address referrer
  );

  /**
   * @notice Event emitted on redeem (deprecated)
   * @param owner The address that owns the shares
   * @param receiver The address that received withdrawn assets
   * @param assets The total number of withdrawn assets
   * @param shares The total number of withdrawn shares
   */
  event Redeemed(address indexed owner, address indexed receiver, uint256 assets, uint256 shares);

  /**
   * @notice Event emitted on shares added to the V1 exit queue (deprecated)
   * @param owner The address that owns the shares
   * @param receiver The address that will receive withdrawn assets
   * @param positionTicket The exit queue ticket that was assigned to the position
   * @param shares The number of shares that queued for the exit
   */
  event ExitQueueEntered(
    address indexed owner,
    address indexed receiver,
    uint256 positionTicket,
    uint256 shares
  );

  /**
   * @notice Event emitted on shares added to the V2 exit queue
   * @param owner The address that owns the shares
   * @param receiver The address that will receive withdrawn assets
   * @param positionTicket The exit queue ticket that was assigned to the position
   * @param shares The number of shares that queued for the exit
   * @param assets The number of assets that queued for the exit
   */
  event V2ExitQueueEntered(
    address indexed owner,
    address indexed receiver,
    uint256 positionTicket,
    uint256 shares,
    uint256 assets
  );

  /**
   * @notice Event emitted on claim of the exited assets
   * @param receiver The address that has received withdrawn assets
   * @param prevPositionTicket The exit queue ticket received after the `enterExitQueue` call
   * @param newPositionTicket The new exit queue ticket in case not all the assets were withdrawn. Otherwise 0.
   * @param withdrawnAssets The total number of assets withdrawn
   */
  event ExitedAssetsClaimed(
    address indexed receiver,
    uint256 prevPositionTicket,
    uint256 newPositionTicket,
    uint256 withdrawnAssets
  );

  /**
   * @notice Locks assets to the exit queue. The shares to assets rate will be locked at the moment of the call.
   * @param shares The number of shares to exit
   * @param receiver The address that will receive assets upon withdrawal
   * @return positionTicket The position ticket of the exit queue
   */
  function enterExitQueue(
    uint256 shares,
    address receiver
  ) external returns (uint256 positionTicket);

  /**
   * @notice Get the exit queue index to claim exited assets from (deprecated)
   * @param positionTicket The exit queue position ticket to get the index for
   * @return The exit queue index that should be used to claim exited assets.
   *         Returns -1 in case such index does not exist.
   */
  function getExitQueueIndex(uint256 positionTicket) external view returns (int256);

  /**
   * @notice Calculates the number of assets that can be claimed from the exit queue.
   * @param receiver The address that will receive assets upon withdrawal
   * @param positionTicket The exit queue ticket received after the `enterExitQueue` call
   * @param timestamp The timestamp when the assets entered the exit queue
   * @param exitQueueIndex The exit queue index at which the shares were burned.
   *        It can be looked up by calling `getExitQueueIndex`. Only relevant for V1 positions, otherwise pass 0.
   * @return leftTickets The number of tickets left in the queue
   * @return exitedTickets The number of tickets that have already exited
   * @return exitedAssets The number of assets that can be claimed
   */
  function calculateExitedAssets(
    address receiver,
    uint256 positionTicket,
    uint256 timestamp,
    uint256 exitQueueIndex
  ) external view returns (uint256 leftTickets, uint256 exitedTickets, uint256 exitedAssets);

  /**
   * @notice Claims assets that were withdrawn by the Vault. It can be called only after the `enterExitQueue` call by the `receiver`.
   * @param positionTicket The exit queue ticket received after the `enterExitQueue` call
   * @param timestamp The timestamp when the assets entered the exit queue
   * @param exitQueueIndex The exit queue index at which the shares were burned.
   *        It can be looked up by calling `getExitQueueIndex`. Only relevant for V1 positions, otherwise pass 0.
   */
  function claimExitedAssets(
    uint256 positionTicket,
    uint256 timestamp,
    uint256 exitQueueIndex
  ) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultState} from './IVaultState.sol';
import {IVaultValidators} from './IVaultValidators.sol';
import {IVaultEnterExit} from './IVaultEnterExit.sol';
import {IKeeperRewards} from './IKeeperRewards.sol';
import {IVaultMev} from './IVaultMev.sol';

/**
 * @title IVaultEthStaking
 * @author StakeWise
 * @notice Defines the interface for the VaultEthStaking contract
 */
interface IVaultEthStaking is IVaultState, IVaultValidators, IVaultEnterExit, IVaultMev {
  /**
   * @notice Deposit ETH to the Vault
   * @param receiver The address that will receive Vault's shares
   * @param referrer The address of the referrer. Set to zero address if not used.
   * @return shares The number of shares minted
   */
  function deposit(address receiver, address referrer) external payable returns (uint256 shares);

  /**
   * @notice Used by MEV escrow to transfer ETH.
   */
  function receiveFromMevEscrow() external payable;

  /**
   * @notice Updates Vault state and deposits ETH to the Vault
   * @param receiver The address that will receive Vault's shares
   * @param referrer The address of the referrer. Set to zero address if not used.
   * @param harvestParams The parameters for harvesting Keeper rewards
   * @return shares The number of shares minted
   */
  function updateStateAndDeposit(
    address receiver,
    address referrer,
    IKeeperRewards.HarvestParams calldata harvestParams
  ) external payable returns (uint256 shares);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultAdmin} from './IVaultAdmin.sol';

/**
 * @title IVaultFee
 * @author StakeWise
 * @notice Defines the interface for the VaultFee contract
 */
interface IVaultFee is IVaultAdmin {
  /**
   * @notice Event emitted on fee recipient update
   * @param caller The address of the function caller
   * @param feeRecipient The address of the new fee recipient
   */
  event FeeRecipientUpdated(address indexed caller, address indexed feeRecipient);

  /**
   * @notice The Vault's fee recipient
   * @return The address of the Vault's fee recipient
   */
  function feeRecipient() external view returns (address);

  /**
   * @notice The Vault's fee percent in BPS
   * @return The fee percent applied by the Vault on the rewards
   */
  function feePercent() external view returns (uint16);

  /**
   * @notice Function for updating the fee recipient address. Can only be called by the admin.
   * @param _feeRecipient The address of the new fee recipient
   */
  function setFeeRecipient(address _feeRecipient) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultState} from './IVaultState.sol';

/**
 * @title IVaultMev
 * @author StakeWise
 * @notice Common interface for the VaultMev contracts
 */
interface IVaultMev is IVaultState {
  /**
   * @notice The contract that accumulates MEV rewards
   * @return The MEV escrow contract address
   */
  function mevEscrow() external view returns (address);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultState} from './IVaultState.sol';
import {IVaultEnterExit} from './IVaultEnterExit.sol';

/**
 * @title IVaultOsToken
 * @author StakeWise
 * @notice Defines the interface for the VaultOsToken contract
 */
interface IVaultOsToken is IVaultState, IVaultEnterExit {
  /**
   * @notice Event emitted on minting osToken
   * @param caller The address of the function caller
   * @param receiver The address of the osToken receiver
   * @param assets The amount of minted assets
   * @param shares The amount of minted shares
   * @param referrer The address of the referrer
   */
  event OsTokenMinted(
    address indexed caller,
    address receiver,
    uint256 assets,
    uint256 shares,
    address referrer
  );

  /**
   * @notice Event emitted on burning OsToken
   * @param caller The address of the function caller
   * @param assets The amount of burned assets
   * @param shares The amount of burned shares
   */
  event OsTokenBurned(address indexed caller, uint256 assets, uint256 shares);

  /**
   * @notice Event emitted on osToken position liquidation
   * @param caller The address of the function caller
   * @param user The address of the user liquidated
   * @param receiver The address of the receiver of the liquidated assets
   * @param osTokenShares The amount of osToken shares to liquidate
   * @param shares The amount of vault shares burned
   * @param receivedAssets The amount of assets received
   */
  event OsTokenLiquidated(
    address indexed caller,
    address indexed user,
    address receiver,
    uint256 osTokenShares,
    uint256 shares,
    uint256 receivedAssets
  );

  /**
   * @notice Event emitted on osToken position redemption
   * @param caller The address of the function caller
   * @param user The address of the position owner to redeem from
   * @param receiver The address of the receiver of the redeemed assets
   * @param osTokenShares The amount of osToken shares to redeem
   * @param shares The amount of vault shares burned
   * @param assets The amount of assets received
   */
  event OsTokenRedeemed(
    address indexed caller,
    address indexed user,
    address receiver,
    uint256 osTokenShares,
    uint256 shares,
    uint256 assets
  );

  /**
   * @notice Struct of osToken position
   * @param shares The total number of minted osToken shares. Will increase based on the treasury fee.
   * @param cumulativeFeePerShare The cumulative fee per share
   */
  struct OsTokenPosition {
    uint128 shares;
    uint128 cumulativeFeePerShare;
  }

  /**
   * @notice Get total amount of minted osToken shares
   * @param user The address of the user
   * @return shares The number of minted osToken shares
   */
  function osTokenPositions(address user) external view returns (uint128 shares);

  /**
   * @notice Mints OsToken shares
   * @param receiver The address that will receive the minted OsToken shares
   * @param osTokenShares The number of OsToken shares to mint to the receiver
   * @param referrer The address of the referrer
   * @return assets The number of assets minted to the receiver
   */
  function mintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer
  ) external returns (uint256 assets);

  /**
   * @notice Burns osToken shares
   * @param osTokenShares The number of shares to burn
   * @return assets The number of assets burned
   */
  function burnOsToken(uint128 osTokenShares) external returns (uint256 assets);

  /**
   * @notice Liquidates a user position and returns the number of received assets.
   *         Can only be called when health factor is below 1 by the liquidator.
   * @param osTokenShares The number of shares to cover
   * @param owner The address of the position owner to liquidate
   * @param receiver The address of the receiver of the liquidated assets
   */
  function liquidateOsToken(uint256 osTokenShares, address owner, address receiver) external;

  /**
   * @notice Redeems osToken shares for assets. Can only be called when health factor is above redeemFromHealthFactor by the redeemer.
   * @param osTokenShares The number of osToken shares to redeem
   * @param owner The address of the position owner to redeem from
   * @param receiver The address of the receiver of the redeemed assets
   */
  function redeemOsToken(uint256 osTokenShares, address owner, address receiver) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title IVaultsRegistry
 * @author StakeWise
 * @notice Defines the interface for the VaultsRegistry
 */
interface IVaultsRegistry {
  /**
   * @notice Event emitted on a Vault addition
   * @param caller The address that has added the Vault
   * @param vault The address of the added Vault
   */
  event VaultAdded(address indexed caller, address indexed vault);

  /**
   * @notice Event emitted on adding Vault implementation contract
   * @param impl The address of the new implementation contract
   */
  event VaultImplAdded(address indexed impl);

  /**
   * @notice Event emitted on removing Vault implementation contract
   * @param impl The address of the removed implementation contract
   */
  event VaultImplRemoved(address indexed impl);

  /**
   * @notice Event emitted on whitelisting the factory
   * @param factory The address of the whitelisted factory
   */
  event FactoryAdded(address indexed factory);

  /**
   * @notice Event emitted on removing the factory from the whitelist
   * @param factory The address of the factory removed from the whitelist
   */
  event FactoryRemoved(address indexed factory);

  /**
   * @notice Registered Vaults
   * @param vault The address of the vault to check whether it is registered
   * @return `true` for the registered Vault, `false` otherwise
   */
  function vaults(address vault) external view returns (bool);

  /**
   * @notice Registered Vault implementations
   * @param impl The address of the vault implementation
   * @return `true` for the registered implementation, `false` otherwise
   */
  function vaultImpls(address impl) external view returns (bool);

  /**
   * @notice Registered Factories
   * @param factory The address of the factory to check whether it is whitelisted
   * @return `true` for the whitelisted Factory, `false` otherwise
   */
  function factories(address factory) external view returns (bool);

  /**
   * @notice Function for adding Vault to the registry. Can only be called by the whitelisted Factory.
   * @param vault The address of the Vault to add
   */
  function addVault(address vault) external;

  /**
   * @notice Function for adding Vault implementation contract
   * @param newImpl The address of the new implementation contract
   */
  function addVaultImpl(address newImpl) external;

  /**
   * @notice Function for removing Vault implementation contract
   * @param impl The address of the removed implementation contract
   */
  function removeVaultImpl(address impl) external;

  /**
   * @notice Function for adding the factory to the whitelist
   * @param factory The address of the factory to add to the whitelist
   */
  function addFactory(address factory) external;

  /**
   * @notice Function for removing the factory from the whitelist
   * @param factory The address of the factory to remove from the whitelist
   */
  function removeFactory(address factory) external;

  /**
   * @notice Function for initializing the registry. Can only be called once during the deployment.
   * @param _owner The address of the owner of the contract
   */
  function initialize(address _owner) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperRewards} from './IKeeperRewards.sol';
import {IVaultFee} from './IVaultFee.sol';

/**
 * @title IVaultState
 * @author StakeWise
 * @notice Defines the interface for the VaultState contract
 */
interface IVaultState is IVaultFee {
  /**
   * @notice Event emitted on checkpoint creation (deprecated)
   * @param shares The number of burned shares
   * @param assets The amount of exited assets
   */
  event CheckpointCreated(uint256 shares, uint256 assets);

  /**
   * @notice Event emitted on minting fee recipient shares
   * @param receiver The address of the fee recipient
   * @param shares The number of minted shares
   * @param assets The amount of minted assets
   */
  event FeeSharesMinted(address receiver, uint256 shares, uint256 assets);

  /**
   * @notice Event emitted when exiting assets are penalized
   * @param penalty The total penalty amount
   */
  event ExitingAssetsPenalized(uint256 penalty);

  /**
   * @notice Total assets in the Vault
   * @return The total amount of the underlying asset that is "managed" by Vault
   */
  function totalAssets() external view returns (uint256);

  /**
   * @notice Function for retrieving total shares
   * @return The amount of shares in existence
   */
  function totalShares() external view returns (uint256);

  /**
   * @notice The Vault's capacity
   * @return The amount after which the Vault stops accepting deposits
   */
  function capacity() external view returns (uint256);

  /**
   * @notice Total assets available in the Vault. They can be staked or withdrawn.
   * @return The total amount of withdrawable assets
   */
  function withdrawableAssets() external view returns (uint256);

  /**
   * @notice Queued Shares (deprecated)
   * @return The total number of shares queued for exit
   */
  function queuedShares() external view returns (uint128);

  /**
   * @notice Total Exiting Assets
   * @return The total number of assets queued for exit
   */
  function totalExitingAssets() external view returns (uint128);

  /**
   * @notice Returns the number of shares held by an account
   * @param account The account for which to look up the number of shares it has, i.e. its balance
   * @return The number of shares held by the account
   */
  function getShares(address account) external view returns (uint256);

  /**
   * @notice Converts shares to assets
   * @param assets The amount of assets to convert to shares
   * @return shares The amount of shares that the Vault would exchange for the amount of assets provided
   */
  function convertToShares(uint256 assets) external view returns (uint256 shares);

  /**
   * @notice Converts assets to shares
   * @param shares The amount of shares to convert to assets
   * @return assets The amount of assets that the Vault would exchange for the amount of shares provided
   */
  function convertToAssets(uint256 shares) external view returns (uint256 assets);

  /**
   * @notice Check whether state update is required
   * @return `true` if state update is required, `false` otherwise
   */
  function isStateUpdateRequired() external view returns (bool);

  /**
   * @notice Updates the total amount of assets in the Vault and its exit queue
   * @param harvestParams The parameters for harvesting Keeper rewards
   */
  function updateState(IKeeperRewards.HarvestParams calldata harvestParams) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperValidators} from './IKeeperValidators.sol';
import {IVaultAdmin} from './IVaultAdmin.sol';
import {IVaultState} from './IVaultState.sol';

/**
 * @title IVaultValidators
 * @author StakeWise
 * @notice Defines the interface for VaultValidators contract
 */
interface IVaultValidators is IVaultAdmin, IVaultState {
  /**
   * @notice Event emitted on validator registration
   * @param publicKey The public key of the validator that was registered
   */
  event ValidatorRegistered(bytes publicKey);

  /**
   * @notice Event emitted on keys manager address update (deprecated)
   * @param caller The address of the function caller
   * @param keysManager The address of the new keys manager
   */
  event KeysManagerUpdated(address indexed caller, address indexed keysManager);

  /**
   * @notice Event emitted on validators merkle tree root update (deprecated)
   * @param caller The address of the function caller
   * @param validatorsRoot The new validators merkle tree root
   */
  event ValidatorsRootUpdated(address indexed caller, bytes32 indexed validatorsRoot);

  /**
   * @notice Event emitted on validators manager address update
   * @param caller The address of the function caller
   * @param validatorsManager The address of the new validators manager
   */
  event ValidatorsManagerUpdated(address indexed caller, address indexed validatorsManager);

  /**
   * @notice The Vault validators manager address
   * @return The address that can register validators
   */
  function validatorsManager() external view returns (address);

  /**
   * @notice Function for registering single or multiple validators
   * @param keeperParams The parameters for getting approval from Keeper oracles
   * @param validatorsManagerSignature The optional signature from the validators manager
   */
  function registerValidators(
    IKeeperValidators.ApprovalParams calldata keeperParams,
    bytes calldata validatorsManagerSignature
  ) external;

  /**
   * @notice Function for updating the validators manager. Can only be called by the admin. Default is the DepositDataRegistry contract.
   * @param _validatorsManager The new validators manager address
   */
  function setValidatorsManager(address _validatorsManager) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IERC1822Proxiable} from '@openzeppelin/contracts/interfaces/draft-IERC1822.sol';
import {IVaultAdmin} from './IVaultAdmin.sol';

/**
 * @title IVaultVersion
 * @author StakeWise
 * @notice Defines the interface for VaultVersion contract
 */
interface IVaultVersion is IERC1822Proxiable, IVaultAdmin {
  /**
   * @notice Vault Unique Identifier
   * @return The unique identifier of the Vault
   */
  function vaultId() external pure returns (bytes32);

  /**
   * @notice Version
   * @return The version of the Vault implementation contract
   */
  function version() external pure returns (uint8);

  /**
   * @notice Implementation
   * @return The address of the Vault implementation contract
   */
  function implementation() external view returns (address);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IVaultAdmin} from './IVaultAdmin.sol';

/**
 * @title IVaultWhitelist
 * @author StakeWise
 * @notice Defines the interface for the VaultWhitelist contract
 */
interface IVaultWhitelist is IVaultAdmin {
  /**
   * @notice Event emitted on whitelist update
   * @param caller The address of the function caller
   * @param account The address of the account updated
   * @param approved Whether account is approved or not
   */
  event WhitelistUpdated(address indexed caller, address indexed account, bool approved);

  /**
   * @notice Event emitted when whitelister address is updated
   * @param caller The address of the function caller
   * @param whitelister The address of the new whitelister
   */
  event WhitelisterUpdated(address indexed caller, address indexed whitelister);

  /**
   * @notice Whitelister address
   * @return The address of the whitelister
   */
  function whitelister() external view returns (address);

  /**
   * @notice Checks whether account is whitelisted or not
   * @param account The account to check
   * @return `true` for the whitelisted account, `false` otherwise
   */
  function whitelistedAccounts(address account) external view returns (bool);

  /**
   * @notice Add or remove account from the whitelist. Can only be called by the whitelister.
   * @param account The account to add or remove from the whitelist
   * @param approved Whether account should be whitelisted or not
   */
  function updateWhitelist(address account, bool approved) external;

  /**
   * @notice Used to update the whitelister. Can only be called by the Vault admin.
   * @param _whitelister The address of the new whitelister
   */
  function setWhitelister(address _whitelister) external;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

/**
 * @title Errors
 * @author StakeWise
 * @notice Contains all the custom errors
 */
library Errors {
  error AccessDenied();
  error InvalidShares();
  error InvalidAssets();
  error ZeroAddress();
  error InsufficientAssets();
  error CapacityExceeded();
  error InvalidCapacity();
  error InvalidSecurityDeposit();
  error InvalidFeeRecipient();
  error InvalidFeePercent();
  error NotHarvested();
  error NotCollateralized();
  error InvalidProof();
  error LowLtv();
  error RedemptionExceeded();
  error InvalidPosition();
  error InvalidLtv();
  error InvalidHealthFactor();
  error InvalidReceivedAssets();
  error InvalidTokenMeta();
  error UpgradeFailed();
  error InvalidValidators();
  error DeadlineExpired();
  error PermitInvalidSigner();
  error InvalidValidatorsRegistryRoot();
  error InvalidVault();
  error AlreadyAdded();
  error AlreadyRemoved();
  error InvalidOracles();
  error NotEnoughSignatures();
  error InvalidOracle();
  error TooEarlyUpdate();
  error InvalidAvgRewardPerSecond();
  error InvalidRewardsRoot();
  error HarvestFailed();
  error LiquidationDisabled();
  error InvalidLiqThresholdPercent();
  error InvalidLiqBonusPercent();
  error InvalidLtvPercent();
  error InvalidCheckpointIndex();
  error InvalidCheckpointValue();
  error MaxOraclesExceeded();
  error ExitRequestNotProcessed();
  error ValueNotChanged();
  error EigenInvalidWithdrawal();
  error InvalidEigenQueuedWithdrawals();
  error InvalidWithdrawalCredentials();
  error EigenPodNotFound();
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Math} from '@openzeppelin/contracts/utils/math/Math.sol';
import {SafeCast} from '@openzeppelin/contracts/utils/math/SafeCast.sol';
import {Errors} from './Errors.sol';

/**
 * @title ExitQueue
 * @author StakeWise
 * @notice ExitQueue represent checkpoints of burned shares and exited assets
 */
library ExitQueue {
  /**
   * @notice A struct containing checkpoint data
   * @param totalTickets The cumulative number of tickets (shares) exited
   * @param exitedAssets The number of assets that exited in this checkpoint
   */
  struct Checkpoint {
    uint160 totalTickets;
    uint96 exitedAssets;
  }

  /**
   * @notice A struct containing the history of checkpoints data
   * @param checkpoints An array of checkpoints
   */
  struct History {
    Checkpoint[] checkpoints;
  }

  /**
   * @notice Check whether the position is a V1 position
   * @param self An array containing checkpoints
   * @param queuedShares The number of shares that are queued for exiting
   * @param positionTicket The position ticket to check
   * @return true if the position is a V1 position, false otherwise
   */
  function isV1Position(
    History storage self,
    uint256 queuedShares,
    uint256 positionTicket
  ) internal view returns (bool) {
    return positionTicket < getLatestTotalTickets(self) + queuedShares;
  }

  /**
   * @notice Get the latest checkpoint total tickets
   * @param self An array containing checkpoints
   * @return The current total tickets or zero if there are no checkpoints
   */
  function getLatestTotalTickets(History storage self) internal view returns (uint256) {
    uint256 pos = self.checkpoints.length;
    unchecked {
      // cannot underflow as subtraction happens in case pos > 0
      return pos == 0 ? 0 : _unsafeAccess(self.checkpoints, pos - 1).totalTickets;
    }
  }

  /**
   * @notice Get checkpoint index for the burned shares
   * @param self An array containing checkpoints
   * @param positionTicket The position ticket to search the closest checkpoint for
   * @return The checkpoint index or the length of checkpoints array in case there is no such
   */
  function getCheckpointIndex(
    History storage self,
    uint256 positionTicket
  ) internal view returns (uint256) {
    uint256 high = self.checkpoints.length;
    uint256 low;
    while (low < high) {
      uint256 mid = Math.average(low, high);
      if (_unsafeAccess(self.checkpoints, mid).totalTickets > positionTicket) {
        high = mid;
      } else {
        unchecked {
          // cannot underflow as mid < high
          low = mid + 1;
        }
      }
    }
    return high;
  }

  /**
   * @notice Calculates burned shares and exited assets
   * @param self An array containing checkpoints
   * @param checkpointIdx The index of the checkpoint to start calculating from
   * @param positionTicket The position ticket to start calculating exited assets from
   * @param positionShares The number of shares to calculate assets for
   * @return burnedShares The number of shares burned
   * @return exitedAssets The number of assets exited
   */
  function calculateExitedAssets(
    History storage self,
    uint256 checkpointIdx,
    uint256 positionTicket,
    uint256 positionShares
  ) internal view returns (uint256 burnedShares, uint256 exitedAssets) {
    uint256 length = self.checkpoints.length;
    // there are no exited assets for such checkpoint index or no shares to burn
    if (checkpointIdx >= length || positionShares == 0) return (0, 0);

    // previous total tickets for calculating how much shares were burned for the period
    uint256 prevTotalTickets;
    unchecked {
      // cannot underflow as subtraction happens in case checkpointIdx > 0
      prevTotalTickets = checkpointIdx == 0
        ? 0
        : _unsafeAccess(self.checkpoints, checkpointIdx - 1).totalTickets;
    }

    // current total tickets for calculating assets per burned share
    // can be used with _unsafeAccess as checkpointIdx < length
    Checkpoint memory checkpoint = _unsafeAccess(self.checkpoints, checkpointIdx);
    uint256 currTotalTickets = checkpoint.totalTickets;
    uint256 checkpointAssets = checkpoint.exitedAssets;
    // check whether position ticket is in [prevTotalTickets, currTotalTickets) range
    if (positionTicket < prevTotalTickets || currTotalTickets <= positionTicket) {
      revert Errors.InvalidCheckpointIndex();
    }

    // calculate amount of available shares that will be updated while iterating over checkpoints
    uint256 availableShares;
    unchecked {
      // cannot underflow as positionTicket < currTotalTickets
      availableShares = currTotalTickets - positionTicket;
    }

    // accumulate assets until the number of required shares is collected
    uint256 checkpointShares;
    uint256 sharesDelta;
    while (true) {
      unchecked {
        // cannot underflow as prevTotalTickets <= positionTicket
        checkpointShares = currTotalTickets - prevTotalTickets;
        // cannot underflow as positionShares > burnedShares while in the loop
        sharesDelta = Math.min(availableShares, positionShares - burnedShares);

        // cannot overflow as it is capped with underlying asset total supply
        burnedShares += sharesDelta;
        exitedAssets += Math.mulDiv(sharesDelta, checkpointAssets, checkpointShares);

        // cannot overflow as checkpoints are created max once per day
        checkpointIdx++;
      }

      // stop when required shares collected or reached end of checkpoints list
      if (positionShares <= burnedShares || checkpointIdx >= length) {
        return (burnedShares, exitedAssets);
      }

      // take next checkpoint
      prevTotalTickets = currTotalTickets;
      // can use _unsafeAccess as checkpointIdx < length is checked above
      checkpoint = _unsafeAccess(self.checkpoints, checkpointIdx);
      currTotalTickets = checkpoint.totalTickets;
      checkpointAssets = checkpoint.exitedAssets;

      unchecked {
        // cannot underflow as every next checkpoint total tickets is larger than previous
        availableShares = currTotalTickets - prevTotalTickets;
      }
    }
  }

  /**
   * @notice Pushes a new checkpoint onto a History
   * @param self An array containing checkpoints
   * @param shares The number of shares to add to the latest checkpoint
   * @param assets The number of assets that were exited for this checkpoint
   */
  function push(History storage self, uint256 shares, uint256 assets) internal {
    if (shares == 0 || assets == 0) revert Errors.InvalidCheckpointValue();
    Checkpoint memory checkpoint = Checkpoint({
      totalTickets: SafeCast.toUint160(getLatestTotalTickets(self) + shares),
      exitedAssets: SafeCast.toUint96(assets)
    });
    self.checkpoints.push(checkpoint);
  }

  function _unsafeAccess(
    Checkpoint[] storage self,
    uint256 pos
  ) private pure returns (Checkpoint storage result) {
    assembly {
      mstore(0, self.slot)
      result.slot := add(keccak256(0, 0x20), pos)
    }
  }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {IEthVault} from '../../interfaces/IEthVault.sol';
import {IEthVaultFactory} from '../../interfaces/IEthVaultFactory.sol';
import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {Multicall} from '../../base/Multicall.sol';
import {VaultValidators} from '../modules/VaultValidators.sol';
import {VaultAdmin} from '../modules/VaultAdmin.sol';
import {VaultFee} from '../modules/VaultFee.sol';
import {VaultVersion, IVaultVersion} from '../modules/VaultVersion.sol';
import {VaultImmutables} from '../modules/VaultImmutables.sol';
import {VaultState} from '../modules/VaultState.sol';
import {VaultEnterExit, IVaultEnterExit} from '../modules/VaultEnterExit.sol';
import {VaultOsToken} from '../modules/VaultOsToken.sol';
import {VaultEthStaking} from '../modules/VaultEthStaking.sol';
import {VaultMev} from '../modules/VaultMev.sol';

/**
 * @title EthVault
 * @author StakeWise
 * @notice Defines the Ethereum staking Vault
 */
contract EthVault is
  VaultImmutables,
  Initializable,
  VaultAdmin,
  VaultVersion,
  VaultFee,
  VaultState,
  VaultValidators,
  VaultEnterExit,
  VaultOsToken,
  VaultMev,
  VaultEthStaking,
  Multicall,
  IEthVault
{
  uint8 private constant _version = 2;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param _keeper The address of the Keeper contract
   * @param _vaultsRegistry The address of the VaultsRegistry contract
   * @param _validatorsRegistry The contract address used for registering validators in beacon chain
   * @param osTokenVaultController The address of the OsTokenVaultController contract
   * @param osTokenConfig The address of the OsTokenConfig contract
   * @param sharedMevEscrow The address of the shared MEV escrow
   * @param depositDataRegistry The address of the DepositDataRegistry contract
   * @param exitingAssetsClaimDelay The delay after which the assets can be claimed after exiting from staking
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(
    address _keeper,
    address _vaultsRegistry,
    address _validatorsRegistry,
    address osTokenVaultController,
    address osTokenConfig,
    address sharedMevEscrow,
    address depositDataRegistry,
    uint256 exitingAssetsClaimDelay
  )
    VaultImmutables(_keeper, _vaultsRegistry, _validatorsRegistry)
    VaultValidators(depositDataRegistry)
    VaultEnterExit(exitingAssetsClaimDelay)
    VaultOsToken(osTokenVaultController, osTokenConfig)
    VaultMev(sharedMevEscrow)
  {
    _disableInitializers();
  }

  /// @inheritdoc IEthVault
  function initialize(
    bytes calldata params
  ) external payable virtual override reinitializer(_version) {
    // if admin is already set, it's an upgrade
    if (admin != address(0)) {
      __EthVault_initV2();
      return;
    }
    // initialize deployed vault
    __EthVault_init(
      IEthVaultFactory(msg.sender).vaultAdmin(),
      IEthVaultFactory(msg.sender).ownMevEscrow(),
      abi.decode(params, (EthVaultInitParams))
    );
  }

  /// @inheritdoc IEthVault
  function depositAndMintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer
  ) public payable override returns (uint256) {
    deposit(msg.sender, referrer);
    if (osTokenShares == type(uint256).max) {
      // mint max OsToken shares based on the deposited amount
      osTokenShares = _calcMaxOsTokenShares(msg.value);
    }
    mintOsToken(receiver, osTokenShares, referrer);
    return osTokenShares;
  }

  /// @inheritdoc IEthVault
  function updateStateAndDepositAndMintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer,
    IKeeperRewards.HarvestParams calldata harvestParams
  ) external payable override returns (uint256) {
    updateState(harvestParams);
    return depositAndMintOsToken(receiver, osTokenShares, referrer);
  }

  /// @inheritdoc IVaultEnterExit
  function enterExitQueue(
    uint256 shares,
    address receiver
  )
    public
    virtual
    override(IVaultEnterExit, VaultEnterExit, VaultOsToken)
    returns (uint256 positionTicket)
  {
    return super.enterExitQueue(shares, receiver);
  }

  /// @inheritdoc VaultVersion
  function vaultId() public pure virtual override(IVaultVersion, VaultVersion) returns (bytes32) {
    return keccak256('EthVault');
  }

  /// @inheritdoc IVaultVersion
  function version() public pure virtual override(IVaultVersion, VaultVersion) returns (uint8) {
    return _version;
  }

  /**
   * @dev Initializes the EthVault contract
   * @param admin The address of the admin of the Vault
   * @param ownMevEscrow The address of the MEV escrow owned by the Vault. Zero address if shared MEV escrow is used.
   * @param params The decoded parameters for initializing the EthVault contract
   */
  function __EthVault_init(
    address admin,
    address ownMevEscrow,
    EthVaultInitParams memory params
  ) internal onlyInitializing {
    __VaultAdmin_init(admin, params.metadataIpfsHash);
    // fee recipient is initially set to admin address
    __VaultFee_init(admin, params.feePercent);
    __VaultState_init(params.capacity);
    __VaultValidators_init();
    __VaultMev_init(ownMevEscrow);
    __VaultEthStaking_init();
  }

  /**
   * @dev Initializes the EthVault V2 contract
   */
  function __EthVault_initV2() internal onlyInitializing {
    __VaultState_initV2();
    __VaultValidators_initV2();
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {IVaultAdmin} from '../../interfaces/IVaultAdmin.sol';
import {Errors} from '../../libraries/Errors.sol';

/**
 * @title VaultAdmin
 * @author StakeWise
 * @notice Defines the admin functionality for the Vault
 */
abstract contract VaultAdmin is Initializable, IVaultAdmin {
  /// @inheritdoc IVaultAdmin
  address public override admin;

  /// @inheritdoc IVaultAdmin
  function setMetadata(string calldata metadataIpfsHash) external override {
    _checkAdmin();
    emit MetadataUpdated(msg.sender, metadataIpfsHash);
  }

  /**
   * @dev Initializes the VaultAdmin contract
   * @param _admin The address of the Vault admin
   */
  function __VaultAdmin_init(
    address _admin,
    string memory metadataIpfsHash
  ) internal onlyInitializing {
    if (_admin == address(0)) revert Errors.ZeroAddress();
    admin = _admin;
    emit MetadataUpdated(msg.sender, metadataIpfsHash);
  }

  /**
   * @dev Internal method for checking whether the caller is admin
   */
  function _checkAdmin() internal view {
    if (msg.sender != admin) revert Errors.AccessDenied();
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {SafeCast} from '@openzeppelin/contracts/utils/math/SafeCast.sol';
import {Math} from '@openzeppelin/contracts/utils/math/Math.sol';
import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {IVaultEnterExit} from '../../interfaces/IVaultEnterExit.sol';
import {ExitQueue} from '../../libraries/ExitQueue.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultImmutables} from './VaultImmutables.sol';
import {VaultState} from './VaultState.sol';

/**
 * @title VaultEnterExit
 * @author StakeWise
 * @notice Defines the functionality for entering and exiting the Vault
 */
abstract contract VaultEnterExit is VaultImmutables, Initializable, VaultState, IVaultEnterExit {
  using ExitQueue for ExitQueue.History;

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  uint256 private immutable _exitingAssetsClaimDelay;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param exitingAssetsClaimDelay The delay after which the assets can be claimed after exiting from staking
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(uint256 exitingAssetsClaimDelay) {
    _exitingAssetsClaimDelay = exitingAssetsClaimDelay;
  }

  /// @inheritdoc IVaultEnterExit
  function getExitQueueIndex(uint256 positionTicket) external view override returns (int256) {
    if (_exitQueue.isV1Position(queuedShares, positionTicket)) {
      uint256 checkpointIdx = _exitQueue.getCheckpointIndex(positionTicket);
      return checkpointIdx < _exitQueue.checkpoints.length ? int256(checkpointIdx) : -1;
    }
    // calculate total exited tickets
    uint256 totalExitedTickets = _totalExitedTickets + _getTotalExitableTickets();
    return (totalExitedTickets > positionTicket) ? int256(0) : -1;
  }

  /// @inheritdoc IVaultEnterExit
  function enterExitQueue(
    uint256 shares,
    address receiver
  ) public virtual override returns (uint256 positionTicket) {
    return _enterExitQueue(msg.sender, shares, receiver);
  }

  /// @inheritdoc IVaultEnterExit
  function calculateExitedAssets(
    address receiver,
    uint256 positionTicket,
    uint256 timestamp,
    uint256 exitQueueIndex
  )
    public
    view
    override
    returns (uint256 leftTickets, uint256 exitedTickets, uint256 exitedAssets)
  {
    uint256 exitingTickets = _exitRequests[
      keccak256(abi.encode(receiver, timestamp, positionTicket))
    ];
    if (exitingTickets == 0) return (0, 0, 0);

    if (_exitQueue.isV1Position(queuedShares, positionTicket)) {
      // calculate exited assets in V1 exit queue
      (exitedTickets, exitedAssets) = _exitQueue.calculateExitedAssets(
        exitQueueIndex,
        positionTicket,
        exitingTickets
      );
    } else {
      // calculate exited assets
      (exitedTickets, exitedAssets) = _calculateExitedTickets(exitingTickets, positionTicket);
    }
    leftTickets = exitingTickets - exitedTickets;
  }

  /// @inheritdoc IVaultEnterExit
  function claimExitedAssets(
    uint256 positionTicket,
    uint256 timestamp,
    uint256 exitQueueIndex
  ) external override {
    // calculate exited tickets and assets
    (uint256 leftTickets, uint256 exitedTickets, uint256 exitedAssets) = calculateExitedAssets(
      msg.sender,
      positionTicket,
      timestamp,
      exitQueueIndex
    );
    if (
      block.timestamp < timestamp + _exitingAssetsClaimDelay ||
      exitedTickets == 0 ||
      exitedAssets == 0
    ) {
      revert Errors.ExitRequestNotProcessed();
    }

    if (_exitQueue.isV1Position(queuedShares, positionTicket)) {
      // update unclaimed assets
      _unclaimedAssets -= SafeCast.toUint128(exitedAssets);
    } else {
      // vault must be harvested to calculate exact withdrawable amount
      _checkHarvested();

      // update state
      totalExitingAssets -= SafeCast.toUint128(exitedAssets);
      _totalExitingTickets -= SafeCast.toUint128(exitedTickets);
      _totalExitedTickets += exitedTickets;
    }

    // clean up current exit request
    delete _exitRequests[keccak256(abi.encode(msg.sender, timestamp, positionTicket))];

    // skip creating new position for the tickets rounding error
    uint256 newPositionTicket;
    if (leftTickets > 1) {
      // update user's queue position
      newPositionTicket = positionTicket + exitedTickets;
      _exitRequests[keccak256(abi.encode(msg.sender, timestamp, newPositionTicket))] = leftTickets;
    }

    // transfer assets to the receiver
    _transferVaultAssets(msg.sender, exitedAssets);
    emit ExitedAssetsClaimed(msg.sender, positionTicket, newPositionTicket, exitedAssets);
  }

  function _calculateExitedTickets(
    uint256 exitingTickets,
    uint256 positionTicket
  ) private view returns (uint256 exitedTickets, uint256 exitedAssets) {
    // calculate total exitable tickets
    uint256 exitableTickets = _getTotalExitableTickets();
    // calculate total exited tickets
    uint256 totalExitedTickets = _totalExitedTickets + exitableTickets;
    if (totalExitedTickets <= positionTicket) return (0, 0);

    // calculate exited tickets and assets
    unchecked {
      // cannot underflow as totalExitedTickets > positionTicket
      exitedTickets = Math.min(exitingTickets, totalExitedTickets - positionTicket);
    }
    return (exitedTickets, _convertExitTicketsToAssets(exitedTickets));
  }

  /**
   * @dev Internal function that must be used to process user deposits
   * @param to The address to mint shares to
   * @param assets The number of assets deposited
   * @param referrer The address of the referrer. Set to zero address if not used.
   * @return shares The total amount of shares minted
   */
  function _deposit(
    address to,
    uint256 assets,
    address referrer
  ) internal virtual returns (uint256 shares) {
    _checkHarvested();
    if (to == address(0)) revert Errors.ZeroAddress();
    if (assets == 0) revert Errors.InvalidAssets();

    uint256 totalAssetsAfter;
    unchecked {
      // cannot overflow as it is capped with underlying asset total supply
      totalAssetsAfter = _totalAssets + assets;
    }
    if (totalAssetsAfter > capacity()) revert Errors.CapacityExceeded();

    // calculate amount of shares to mint
    shares = _convertToShares(assets, Math.Rounding.Ceil);

    // update state
    _totalAssets = SafeCast.toUint128(totalAssetsAfter);
    _mintShares(to, shares);

    emit Deposited(msg.sender, to, assets, shares, referrer);
  }

  /**
   * @dev Internal function for sending user shares to the exit queue
   * @param user The address of the user
   * @param shares The number of shares to lock
   * @param receiver The address that will receive assets upon withdrawal
   * @return positionTicket The position ticket of the exit queue
   */
  function _enterExitQueue(
    address user,
    uint256 shares,
    address receiver
  ) internal returns (uint256 positionTicket) {
    _checkHarvested();
    if (shares == 0) revert Errors.InvalidShares();
    if (receiver == address(0)) revert Errors.ZeroAddress();

    // calculate amount of assets to lock
    uint256 assets = convertToAssets(shares);
    if (assets == 0) revert Errors.InvalidAssets();

    // convert assets to exiting tickets
    uint256 exitingTickets = _convertAssetsToExitTickets(assets);

    // reduce total assets
    _totalAssets -= SafeCast.toUint128(assets);

    // burn shares
    _burnShares(user, shares);

    // SLOAD to memory
    uint256 totalExitingTickets = _totalExitingTickets;

    // calculate position ticket
    positionTicket = _totalExitedTickets + totalExitingTickets;

    // increase total exiting assets and tickets
    totalExitingAssets += SafeCast.toUint128(assets);
    _totalExitingTickets = SafeCast.toUint128(totalExitingTickets + exitingTickets);

    // add to the exit requests
    _exitRequests[
      keccak256(abi.encode(receiver, block.timestamp, positionTicket))
    ] = exitingTickets;

    emit V2ExitQueueEntered(user, receiver, positionTicket, shares, assets);
  }

  /**
   * @dev Internal function for calculating the number of assets that can be withdrawn
   * @return assets The number of assets that can be withdrawn
   */
  function _getTotalExitableTickets() private view returns (uint256) {
    // calculate available assets
    uint256 availableAssets = _vaultAssets() - _unclaimedAssets;
    uint256 queuedAssets = convertToAssets(queuedShares);
    if (queuedAssets > 0) {
      unchecked {
        // cannot underflow as availableAssets >= queuedV1Assets
        availableAssets = availableAssets > queuedAssets ? availableAssets - queuedAssets : 0;
      }
    }
    if (availableAssets == 0) return 0;

    // calculate number of tickets that can be withdrawn based on available assets
    return _convertAssetsToExitTickets(Math.min(availableAssets, totalExitingAssets));
  }

  /**
   * @dev Internal function for transferring assets from the Vault to the receiver
   * @dev IMPORTANT: because control is transferred to the receiver, care must be
   *    taken to not create reentrancy vulnerabilities. The Vault must follow the checks-effects-interactions pattern:
   *    https://docs.soliditylang.org/en/v0.8.22/security-considerations.html#use-the-checks-effects-interactions-pattern
   * @param receiver The address that will receive the assets
   * @param assets The number of assets to transfer
   */
  function _transferVaultAssets(address receiver, uint256 assets) internal virtual;

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {ReentrancyGuardUpgradeable} from '@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol';
import {Address} from '@openzeppelin/contracts/utils/Address.sol';
import {IEthValidatorsRegistry} from '../../interfaces/IEthValidatorsRegistry.sol';
import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {IVaultEthStaking} from '../../interfaces/IVaultEthStaking.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultValidators} from './VaultValidators.sol';
import {VaultState} from './VaultState.sol';
import {VaultEnterExit} from './VaultEnterExit.sol';
import {VaultMev} from './VaultMev.sol';

/**
 * @title VaultEthStaking
 * @author StakeWise
 * @notice Defines the Ethereum staking functionality for the Vault
 */
abstract contract VaultEthStaking is
  Initializable,
  ReentrancyGuardUpgradeable,
  VaultState,
  VaultValidators,
  VaultEnterExit,
  VaultMev,
  IVaultEthStaking
{
  uint256 private constant _securityDeposit = 1e9;

  /// @inheritdoc IVaultEthStaking
  function deposit(
    address receiver,
    address referrer
  ) public payable virtual override returns (uint256 shares) {
    return _deposit(receiver, msg.value, referrer);
  }

  /// @inheritdoc IVaultEthStaking
  function updateStateAndDeposit(
    address receiver,
    address referrer,
    IKeeperRewards.HarvestParams calldata harvestParams
  ) public payable virtual override returns (uint256 shares) {
    updateState(harvestParams);
    return deposit(receiver, referrer);
  }

  /**
   * @dev Function for depositing using fallback function
   */
  receive() external payable virtual {
    _deposit(msg.sender, msg.value, address(0));
  }

  /// @inheritdoc IVaultEthStaking
  function receiveFromMevEscrow() external payable override {
    if (msg.sender != mevEscrow()) revert Errors.AccessDenied();
  }

  /// @inheritdoc VaultValidators
  function _registerSingleValidator(bytes calldata validator) internal virtual override {
    bytes calldata publicKey = validator[:48];
    IEthValidatorsRegistry(_validatorsRegistry).deposit{value: _validatorDeposit()}(
      publicKey,
      _withdrawalCredentials(),
      validator[48:144],
      bytes32(validator[144:_validatorLength()])
    );
    emit ValidatorRegistered(publicKey);
  }

  /// @inheritdoc VaultValidators
  function _registerMultipleValidators(bytes calldata validators) internal virtual override {
    uint256 startIndex;
    uint256 endIndex;
    uint256 validatorsCount = validators.length / _validatorLength();
    bytes memory withdrawalCredentials = _withdrawalCredentials();
    bytes calldata validator;
    bytes calldata publicKey;
    for (uint256 i = 0; i < validatorsCount; ) {
      unchecked {
        // cannot realistically overflow
        endIndex += _validatorLength();
      }
      validator = validators[startIndex:endIndex];
      publicKey = validator[:48];
      IEthValidatorsRegistry(_validatorsRegistry).deposit{value: _validatorDeposit()}(
        publicKey,
        withdrawalCredentials,
        validator[48:144],
        bytes32(validator[144:_validatorLength()])
      );
      emit ValidatorRegistered(publicKey);
      startIndex = endIndex;
      unchecked {
        // cannot realistically overflow
        ++i;
      }
    }
  }

  /// @inheritdoc VaultState
  function _vaultAssets() internal view virtual override returns (uint256) {
    return address(this).balance;
  }

  /// @inheritdoc VaultEnterExit
  function _transferVaultAssets(
    address receiver,
    uint256 assets
  ) internal virtual override nonReentrant {
    return Address.sendValue(payable(receiver), assets);
  }

  /// @inheritdoc VaultValidators
  function _validatorLength() internal pure virtual override returns (uint256) {
    return 176;
  }

  /// @inheritdoc VaultValidators
  function _validatorDeposit() internal pure virtual override returns (uint256) {
    return 32 ether;
  }

  /**
   * @dev Internal function for calculating Vault withdrawal credentials
   * @return The credentials used for the validators withdrawals
   */
  function _withdrawalCredentials() private view returns (bytes memory) {
    return abi.encodePacked(bytes1(0x01), bytes11(0x0), address(this));
  }

  /**
   * @dev Initializes the VaultEthStaking contract
   */
  function __VaultEthStaking_init() internal onlyInitializing {
    __ReentrancyGuard_init();

    // see https://github.com/OpenZeppelin/openzeppelin-contracts/issues/3706
    if (msg.value < _securityDeposit) revert Errors.InvalidSecurityDeposit();
    _deposit(address(this), msg.value, address(0));
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {IVaultFee} from '../../interfaces/IVaultFee.sol';
import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultAdmin} from './VaultAdmin.sol';
import {VaultImmutables} from './VaultImmutables.sol';

/**
 * @title VaultFee
 * @author StakeWise
 * @notice Defines the fee functionality for the Vault
 */
abstract contract VaultFee is VaultImmutables, Initializable, VaultAdmin, IVaultFee {
  uint256 internal constant _maxFeePercent = 10_000; // @dev 100.00 %

  /// @inheritdoc IVaultFee
  address public override feeRecipient;

  /// @inheritdoc IVaultFee
  uint16 public override feePercent;

  /// @inheritdoc IVaultFee
  function setFeeRecipient(address _feeRecipient) external override {
    _checkAdmin();
    _setFeeRecipient(_feeRecipient);
  }

  /**
   * @dev Internal function for updating the fee recipient externally or from the initializer
   * @param _feeRecipient The address of the new fee recipient
   */
  function _setFeeRecipient(address _feeRecipient) private {
    _checkHarvested();
    if (_feeRecipient == address(0)) revert Errors.InvalidFeeRecipient();

    // update fee recipient address
    feeRecipient = _feeRecipient;
    emit FeeRecipientUpdated(msg.sender, _feeRecipient);
  }

  /**
   * @dev Initializes the VaultFee contract
   * @param _feeRecipient The address of the fee recipient
   * @param _feePercent The fee percent that is charged by the Vault
   */
  function __VaultFee_init(address _feeRecipient, uint16 _feePercent) internal onlyInitializing {
    if (_feePercent > _maxFeePercent) revert Errors.InvalidFeePercent();

    _setFeeRecipient(_feeRecipient);
    feePercent = _feePercent;
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {Errors} from '../../libraries/Errors.sol';

/**
 * @title VaultImmutables
 * @author StakeWise
 * @notice Defines the Vault common immutable variables
 */
abstract contract VaultImmutables {
  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  address internal immutable _keeper;

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  address internal immutable _vaultsRegistry;

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  address internal immutable _validatorsRegistry;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param keeper The address of the Keeper contract
   * @param vaultsRegistry The address of the VaultsRegistry contract
   * @param validatorsRegistry The contract address used for registering validators in beacon chain
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(address keeper, address vaultsRegistry, address validatorsRegistry) {
    _keeper = keeper;
    _vaultsRegistry = vaultsRegistry;
    _validatorsRegistry = validatorsRegistry;
  }

  /**
   * @dev Internal method for checking whether the vault is harvested
   */
  function _checkHarvested() internal view {
    if (IKeeperRewards(_keeper).isHarvestRequired(address(this))) revert Errors.NotHarvested();
  }

  /**
   * @dev Internal method for checking whether the vault is collateralized
   */
  function _checkCollateralized() internal view {
    if (!IKeeperRewards(_keeper).isCollateralized(address(this))) revert Errors.NotCollateralized();
  }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {ISharedMevEscrow} from '../../interfaces/ISharedMevEscrow.sol';
import {IOwnMevEscrow} from '../../interfaces/IOwnMevEscrow.sol';
import {IVaultMev} from '../../interfaces/IVaultMev.sol';
import {VaultState} from './VaultState.sol';

/**
 * @title VaultMev
 * @author StakeWise
 * @notice Defines the Vaults' MEV functionality
 */
abstract contract VaultMev is Initializable, VaultState, IVaultMev {
  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  address private immutable _sharedMevEscrow;
  address private _ownMevEscrow;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param sharedMevEscrow The address of the shared MEV escrow
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(address sharedMevEscrow) {
    _sharedMevEscrow = sharedMevEscrow;
  }

  /// @inheritdoc IVaultMev
  function mevEscrow() public view override returns (address) {
    // SLOAD to memory
    address ownMevEscrow = _ownMevEscrow;
    return ownMevEscrow != address(0) ? ownMevEscrow : _sharedMevEscrow;
  }

  /// @inheritdoc VaultState
  function _harvestAssets(
    IKeeperRewards.HarvestParams calldata harvestParams
  ) internal override returns (int256, bool) {
    (int256 totalAssetsDelta, uint256 unlockedMevDelta, bool harvested) = IKeeperRewards(_keeper)
      .harvest(harvestParams);

    // harvest execution rewards only when consensus rewards were harvested
    if (!harvested) return (totalAssetsDelta, harvested);

    // SLOAD to memory
    address _mevEscrow = mevEscrow();
    if (_mevEscrow == _sharedMevEscrow) {
      if (unlockedMevDelta > 0) {
        // withdraw assets from shared escrow only in case reward is positive
        ISharedMevEscrow(_mevEscrow).harvest(unlockedMevDelta);
      }
      return (totalAssetsDelta, harvested);
    }

    // execution rewards are always equal to what was accumulated in own MEV escrow
    return (totalAssetsDelta + int256(IOwnMevEscrow(_mevEscrow).harvest()), harvested);
  }

  /**
   * @dev Initializes the VaultMev contract
   * @param ownMevEscrow The address of the own MEV escrow contract
   */
  function __VaultMev_init(address ownMevEscrow) internal onlyInitializing {
    if (ownMevEscrow != address(0)) _ownMevEscrow = ownMevEscrow;
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Math} from '@openzeppelin/contracts/utils/math/Math.sol';
import {SafeCast} from '@openzeppelin/contracts/utils/math/SafeCast.sol';
import {IOsTokenVaultController} from '../../interfaces/IOsTokenVaultController.sol';
import {IOsTokenConfig} from '../../interfaces/IOsTokenConfig.sol';
import {IVaultOsToken} from '../../interfaces/IVaultOsToken.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultImmutables} from './VaultImmutables.sol';
import {VaultEnterExit, IVaultEnterExit} from './VaultEnterExit.sol';
import {VaultState} from './VaultState.sol';

/**
 * @title VaultOsToken
 * @author StakeWise
 * @notice Defines the functionality for minting OsToken
 */
abstract contract VaultOsToken is VaultImmutables, VaultState, VaultEnterExit, IVaultOsToken {
  uint256 private constant _wad = 1e18;
  uint256 private constant _hfLiqThreshold = 1e18;
  uint256 private constant _maxPercent = 1e18;
  uint256 private constant _disabledLiqThreshold = type(uint64).max;

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  IOsTokenVaultController private immutable _osTokenVaultController;

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  IOsTokenConfig private immutable _osTokenConfig;

  mapping(address => OsTokenPosition) private _positions;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param osTokenVaultController The address of the OsTokenVaultController contract
   * @param osTokenConfig The address of the OsTokenConfig contract
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(address osTokenVaultController, address osTokenConfig) {
    _osTokenVaultController = IOsTokenVaultController(osTokenVaultController);
    _osTokenConfig = IOsTokenConfig(osTokenConfig);
  }

  /// @inheritdoc IVaultOsToken
  function osTokenPositions(address user) external view override returns (uint128 shares) {
    OsTokenPosition memory position = _positions[user];
    if (position.shares != 0) _syncPositionFee(position);
    return position.shares;
  }

  /// @inheritdoc IVaultOsToken
  function mintOsToken(
    address receiver,
    uint256 osTokenShares,
    address referrer
  ) public virtual override returns (uint256 assets) {
    _checkCollateralized();
    _checkHarvested();

    // mint osToken shares to the receiver
    assets = _osTokenVaultController.mintShares(receiver, osTokenShares);

    // fetch user position
    OsTokenPosition memory position = _positions[msg.sender];
    if (position.shares != 0) {
      _syncPositionFee(position);
    } else {
      position.cumulativeFeePerShare = SafeCast.toUint128(
        _osTokenVaultController.cumulativeFeePerShare()
      );
    }

    // add minted shares to the position
    position.shares += SafeCast.toUint128(osTokenShares);

    // calculate and validate LTV
    if (_calcMaxOsTokenShares(convertToAssets(_balances[msg.sender])) < position.shares) {
      revert Errors.LowLtv();
    }

    // update state
    _positions[msg.sender] = position;

    // emit event
    emit OsTokenMinted(msg.sender, receiver, assets, osTokenShares, referrer);
  }

  /// @inheritdoc IVaultOsToken
  function burnOsToken(uint128 osTokenShares) external override returns (uint256 assets) {
    // burn osToken shares
    assets = _osTokenVaultController.burnShares(msg.sender, osTokenShares);

    // fetch user position
    OsTokenPosition memory position = _positions[msg.sender];
    if (position.shares == 0) revert Errors.InvalidPosition();
    _syncPositionFee(position);

    // update osToken position
    position.shares -= osTokenShares;
    _positions[msg.sender] = position;

    // emit event
    emit OsTokenBurned(msg.sender, assets, osTokenShares);
  }

  /// @inheritdoc IVaultOsToken
  function liquidateOsToken(
    uint256 osTokenShares,
    address owner,
    address receiver
  ) external override {
    (uint256 burnedShares, uint256 receivedAssets) = _redeemOsToken(
      owner,
      receiver,
      osTokenShares,
      true
    );
    emit OsTokenLiquidated(
      msg.sender,
      owner,
      receiver,
      osTokenShares,
      burnedShares,
      receivedAssets
    );
  }

  /// @inheritdoc IVaultOsToken
  function redeemOsToken(uint256 osTokenShares, address owner, address receiver) external override {
    if (msg.sender != _osTokenConfig.redeemer()) revert Errors.AccessDenied();
    (uint256 burnedShares, uint256 receivedAssets) = _redeemOsToken(
      owner,
      receiver,
      osTokenShares,
      false
    );
    emit OsTokenRedeemed(msg.sender, owner, receiver, osTokenShares, burnedShares, receivedAssets);
  }

  /// @inheritdoc IVaultEnterExit
  function enterExitQueue(
    uint256 shares,
    address receiver
  ) public virtual override(IVaultEnterExit, VaultEnterExit) returns (uint256 positionTicket) {
    positionTicket = super.enterExitQueue(shares, receiver);
    _checkOsTokenPosition(msg.sender);
  }

  /**
   * @dev Internal function for redeeming and liquidating osToken shares
   * @param owner The minter of the osToken shares
   * @param receiver The receiver of the assets
   * @param osTokenShares The amount of osToken shares to redeem or liquidate
   * @param isLiquidation Whether the liquidation or redemption is being performed
   * @return burnedShares The amount of shares burned
   * @return receivedAssets The amount of assets received
   */
  function _redeemOsToken(
    address owner,
    address receiver,
    uint256 osTokenShares,
    bool isLiquidation
  ) private returns (uint256 burnedShares, uint256 receivedAssets) {
    if (receiver == address(0)) revert Errors.ZeroAddress();
    _checkHarvested();

    // update osToken state for gas efficiency
    _osTokenVaultController.updateState();

    // fetch user position
    OsTokenPosition memory position = _positions[owner];
    if (position.shares == 0) revert Errors.InvalidPosition();
    _syncPositionFee(position);

    // SLOAD to memory
    IOsTokenConfig.Config memory osTokenConfig = _osTokenConfig.getConfig(address(this));
    if (isLiquidation && osTokenConfig.liqThresholdPercent == _disabledLiqThreshold) {
      revert Errors.LiquidationDisabled();
    }

    // calculate received assets
    if (isLiquidation) {
      receivedAssets = Math.mulDiv(
        _osTokenVaultController.convertToAssets(osTokenShares),
        osTokenConfig.liqBonusPercent,
        _maxPercent
      );
    } else {
      receivedAssets = _osTokenVaultController.convertToAssets(osTokenShares);
    }

    {
      // check whether received assets are valid
      uint256 depositedAssets = convertToAssets(_balances[owner]);
      if (receivedAssets > depositedAssets || receivedAssets > withdrawableAssets()) {
        revert Errors.InvalidReceivedAssets();
      }

      uint256 mintedAssets = _osTokenVaultController.convertToAssets(position.shares);
      if (isLiquidation) {
        // check health factor violation in case of liquidation
        if (
          Math.mulDiv(
            depositedAssets * _wad,
            osTokenConfig.liqThresholdPercent,
            mintedAssets * _maxPercent
          ) >= _hfLiqThreshold
        ) {
          revert Errors.InvalidHealthFactor();
        }
      }
    }

    // reduce osToken supply
    _osTokenVaultController.burnShares(msg.sender, osTokenShares);

    // update osToken position
    position.shares -= SafeCast.toUint128(osTokenShares);
    _positions[owner] = position;

    burnedShares = convertToShares(receivedAssets);

    // update total assets
    unchecked {
      _totalAssets -= SafeCast.toUint128(receivedAssets);
    }

    // burn owner shares
    _burnShares(owner, burnedShares);

    // transfer assets to the receiver
    _transferVaultAssets(receiver, receivedAssets);
  }

  /**
   * @dev Internal function for syncing the osToken fee
   * @param position The position to sync the fee for
   */
  function _syncPositionFee(OsTokenPosition memory position) private view {
    // fetch current cumulative fee per share
    uint256 cumulativeFeePerShare = _osTokenVaultController.cumulativeFeePerShare();

    // check whether fee is already up to date
    if (cumulativeFeePerShare == position.cumulativeFeePerShare) return;

    // add treasury fee to the position
    position.shares = SafeCast.toUint128(
      Math.mulDiv(position.shares, cumulativeFeePerShare, position.cumulativeFeePerShare)
    );
    position.cumulativeFeePerShare = SafeCast.toUint128(cumulativeFeePerShare);
  }

  /**
   * @notice Internal function for checking position validity. Reverts if it is invalid.
   * @param user The address of the user
   */
  function _checkOsTokenPosition(address user) internal view {
    // fetch user position
    OsTokenPosition memory position = _positions[user];
    if (position.shares == 0) return;

    // check whether vault assets are up to date
    _checkHarvested();

    // sync fee
    _syncPositionFee(position);

    // calculate and validate position LTV
    if (_calcMaxOsTokenShares(convertToAssets(_balances[user])) < position.shares) {
      revert Errors.LowLtv();
    }
  }

  /**
   * @dev Internal function for calculating the maximum amount of osToken shares that can be minted
   * @param assets The amount of assets to convert to osToken shares
   * @return maxOsTokenShares The maximum amount of osToken shares that can be minted
   */
  function _calcMaxOsTokenShares(uint256 assets) internal view returns (uint256) {
    uint256 maxOsTokenAssets = Math.mulDiv(
      assets,
      _osTokenConfig.getConfig(address(this)).ltvPercent,
      _maxPercent
    );
    return _osTokenVaultController.convertToShares(maxOsTokenAssets);
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {SafeCast} from '@openzeppelin/contracts/utils/math/SafeCast.sol';
import {Math} from '@openzeppelin/contracts/utils/math/Math.sol';
import {IVaultState} from '../../interfaces/IVaultState.sol';
import {IKeeperRewards} from '../../interfaces/IKeeperRewards.sol';
import {ExitQueue} from '../../libraries/ExitQueue.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultImmutables} from './VaultImmutables.sol';
import {VaultFee} from './VaultFee.sol';

/**
 * @title VaultState
 * @author StakeWise
 * @notice Defines Vault's state manipulation
 */
abstract contract VaultState is VaultImmutables, Initializable, VaultFee, IVaultState {
  using ExitQueue for ExitQueue.History;

  uint128 internal _totalShares;
  uint128 internal _totalAssets;

  /// @inheritdoc IVaultState
  uint128 public override queuedShares; // deprecated
  uint128 internal _unclaimedAssets; // deprecated
  ExitQueue.History internal _exitQueue; // deprecated

  mapping(bytes32 => uint256) internal _exitRequests;
  mapping(address => uint256) internal _balances;

  uint256 private _capacity;

  /// @inheritdoc IVaultState
  uint128 public override totalExitingAssets;
  uint128 internal _totalExitingTickets;
  uint256 internal _totalExitedTickets;

  /// @inheritdoc IVaultState
  function totalShares() external view override returns (uint256) {
    return _totalShares;
  }

  /// @inheritdoc IVaultState
  function totalAssets() external view override returns (uint256) {
    return _totalAssets;
  }

  /// @inheritdoc IVaultState
  function getShares(address account) external view override returns (uint256) {
    return _balances[account];
  }

  /// @inheritdoc IVaultState
  function convertToShares(uint256 assets) public view override returns (uint256 shares) {
    return _convertToShares(assets, Math.Rounding.Floor);
  }

  /// @inheritdoc IVaultState
  function convertToAssets(uint256 shares) public view override returns (uint256 assets) {
    uint256 totalShares_ = _totalShares;
    return (totalShares_ == 0) ? shares : Math.mulDiv(shares, _totalAssets, totalShares_);
  }

  /// @inheritdoc IVaultState
  function capacity() public view override returns (uint256) {
    // SLOAD to memory
    uint256 capacity_ = _capacity;

    // if capacity is not set, it is unlimited
    return capacity_ == 0 ? type(uint256).max : capacity_;
  }

  /// @inheritdoc IVaultState
  function withdrawableAssets() public view override returns (uint256) {
    uint256 vaultAssets = _vaultAssets();
    unchecked {
      // calculate assets that are reserved by users who queued for exit
      // cannot overflow as it is capped with underlying asset total supply
      uint256 reservedAssets = convertToAssets(queuedShares) +
        totalExitingAssets +
        _unclaimedAssets;
      return vaultAssets > reservedAssets ? vaultAssets - reservedAssets : 0;
    }
  }

  /// @inheritdoc IVaultState
  function isStateUpdateRequired() external view override returns (bool) {
    return IKeeperRewards(_keeper).isHarvestRequired(address(this));
  }

  /// @inheritdoc IVaultState
  function updateState(
    IKeeperRewards.HarvestParams calldata harvestParams
  ) public virtual override {
    // process total assets delta  since last update
    (int256 totalAssetsDelta, bool harvested) = _harvestAssets(harvestParams);

    // process total assets delta if it has changed
    _processTotalAssetsDelta(totalAssetsDelta);

    // update exit queue every time new update is harvested (deprecated)
    if (harvested) _updateExitQueue();
  }

  /**
   * @dev Internal function for processing rewards and penalties
   * @param totalAssetsDelta The number of assets earned or lost
   */
  function _processTotalAssetsDelta(int256 totalAssetsDelta) internal virtual {
    // skip processing if there is no change in assets
    if (totalAssetsDelta == 0) return;

    // SLOAD to memory
    uint256 newTotalAssets = _totalAssets;
    if (totalAssetsDelta < 0) {
      uint256 penalty = uint256(-totalAssetsDelta);

      // SLOAD to memory
      uint256 _totalExitingAssets = totalExitingAssets;
      if (_totalExitingAssets > 0) {
        // apply penalty to exiting assets
        uint256 exitingAssetsPenalty = Math.mulDiv(
          penalty,
          _totalExitingAssets,
          _totalExitingAssets + newTotalAssets
        );

        // apply penalty to total exiting assets
        unchecked {
          // cannot underflow as exitingAssetsPenalty <= penalty
          penalty -= exitingAssetsPenalty;
          // cannot underflow as exitingAssetsPenalty <= _totalExitingAssets
          totalExitingAssets = SafeCast.toUint128(_totalExitingAssets - exitingAssetsPenalty);
        }
        emit ExitingAssetsPenalized(exitingAssetsPenalty);
      }

      // subtract penalty from total assets (excludes exiting assets)
      if (penalty > 0) {
        _totalAssets = SafeCast.toUint128(newTotalAssets - penalty);
      }
      return;
    }

    // convert assets delta as it is positive
    uint256 profitAssets = uint256(totalAssetsDelta);
    newTotalAssets += profitAssets;

    // update state
    _totalAssets = SafeCast.toUint128(newTotalAssets);

    // calculate admin fee recipient assets
    uint256 feeRecipientAssets = Math.mulDiv(profitAssets, feePercent, _maxFeePercent);
    if (feeRecipientAssets == 0) return;

    // SLOAD to memory
    uint256 totalShares_ = _totalShares;

    // calculate fee recipient's shares
    uint256 feeRecipientShares;
    if (totalShares_ == 0) {
      feeRecipientShares = feeRecipientAssets;
    } else {
      unchecked {
        feeRecipientShares = Math.mulDiv(
          feeRecipientAssets,
          totalShares_,
          newTotalAssets - feeRecipientAssets
        );
      }
    }

    // SLOAD to memory
    address _feeRecipient = feeRecipient;
    // mint shares to the fee recipient
    _mintShares(_feeRecipient, feeRecipientShares);
    emit FeeSharesMinted(_feeRecipient, feeRecipientShares, feeRecipientAssets);
  }

  /**
	 * @dev Internal function that must be used to process exit queue
   * @dev Make sure that sufficient time passed between exit queue updates (at least 1 day).
          Currently it's restricted by the keeper's harvest interval
   * @return burnedShares The total amount of burned shares
   */
  function _updateExitQueue() internal virtual returns (uint256 burnedShares) {
    // SLOAD to memory
    uint256 _queuedShares = queuedShares;
    if (_queuedShares == 0) return 0;

    // calculate the amount of assets that can be exited
    uint256 unclaimedAssets = _unclaimedAssets;
    uint256 exitedAssets = Math.min(
      _vaultAssets() - unclaimedAssets,
      convertToAssets(_queuedShares)
    );
    if (exitedAssets == 0) return 0;

    // calculate the amount of shares that can be burned
    burnedShares = convertToShares(exitedAssets);
    if (burnedShares == 0) return 0;

    // update queued shares and unclaimed assets
    queuedShares = SafeCast.toUint128(_queuedShares - burnedShares);
    _unclaimedAssets = SafeCast.toUint128(unclaimedAssets + exitedAssets);

    // push checkpoint so that exited assets could be claimed
    _exitQueue.push(burnedShares, exitedAssets);
    emit CheckpointCreated(burnedShares, exitedAssets);

    // update state
    _totalShares -= SafeCast.toUint128(burnedShares);
    _totalAssets -= SafeCast.toUint128(exitedAssets);
  }

  /**
   * @dev Internal function for minting shares
   * @param owner The address of the owner to mint shares to
   * @param shares The number of shares to mint
   */
  function _mintShares(address owner, uint256 shares) internal virtual {
    // update total shares
    _totalShares += SafeCast.toUint128(shares);

    // mint shares
    unchecked {
      // cannot overflow because the sum of all user
      // balances can't exceed the max uint256 value
      _balances[owner] += shares;
    }
  }

  /**
   * @dev Internal function for burning shares
   * @param owner The address of the owner to burn shares for
   * @param shares The number of shares to burn
   */
  function _burnShares(address owner, uint256 shares) internal virtual {
    // burn shares
    _balances[owner] -= shares;

    // update total shares
    unchecked {
      // cannot underflow because the sum of all shares can't exceed the _totalShares
      _totalShares -= SafeCast.toUint128(shares);
    }
  }

  /**
   * @dev Internal conversion function (from assets to shares) with support for rounding direction.
   */
  function _convertToShares(
    uint256 assets,
    Math.Rounding rounding
  ) internal view returns (uint256 shares) {
    uint256 totalShares_ = _totalShares;
    // Will revert if assets > 0, totalShares > 0 and _totalAssets = 0.
    // That corresponds to a case where any asset would represent an infinite amount of shares.
    return
      (assets == 0 || totalShares_ == 0)
        ? assets
        : Math.mulDiv(assets, totalShares_, _totalAssets, rounding);
  }

  /**
   * @dev Internal conversion function (from assets to exit tickets)
   */
  function _convertAssetsToExitTickets(uint256 assets) internal view returns (uint256 exitTickets) {
    uint256 totalExitingTickets = _totalExitingTickets;
    // Will revert if assets > 0, totalExitingTickets > 0 and totalExitingAssets = 0.
    // That corresponds to a case where any asset would represent an infinite amount of tickets.
    return
      (assets == 0 || totalExitingTickets == 0)
        ? assets
        : Math.mulDiv(assets, totalExitingTickets, totalExitingAssets, Math.Rounding.Floor);
  }

  /**
   * @dev Internal conversion function (from exit tickets to assets)
   */
  function _convertExitTicketsToAssets(uint256 exitTickets) internal view returns (uint256 assets) {
    uint256 totalExitingTickets = _totalExitingTickets;
    return
      (totalExitingTickets == 0)
        ? exitTickets
        : Math.mulDiv(exitTickets, totalExitingAssets, totalExitingTickets);
  }

  /**
   * @dev Internal function for harvesting Vaults' new assets
   * @return The total assets delta after harvest
   * @return `true` when the rewards were harvested, `false` otherwise
   */
  function _harvestAssets(
    IKeeperRewards.HarvestParams calldata harvestParams
  ) internal virtual returns (int256, bool);

  /**
	 * @dev Internal function for retrieving the total assets stored in the Vault.
          NB! Assets can be forcibly sent to the vault, the returned value must be used with caution
   * @return The total amount of assets stored in the Vault
   */
  function _vaultAssets() internal view virtual returns (uint256);

  /**
   * @dev Initializes the VaultState contract
   * @param capacity_ The amount after which the Vault stops accepting deposits
   */
  function __VaultState_init(uint256 capacity_) internal onlyInitializing {
    if (capacity_ == 0) revert Errors.InvalidCapacity();
    // skip setting capacity if it is unlimited
    if (capacity_ != type(uint256).max) _capacity = capacity_;
  }

  /**
   * @dev Initializes the VaultState contract V2
   */
  function __VaultState_initV2() internal onlyInitializing {
    // set initial value for total exited tickets
    _totalExitedTickets = _exitQueue.getLatestTotalTickets() + queuedShares;
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[48] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {MerkleProof} from '@openzeppelin/contracts/utils/cryptography/MerkleProof.sol';
import {MessageHashUtils} from '@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol';
import {SignatureChecker} from '@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol';
import {IKeeperValidators} from '../../interfaces/IKeeperValidators.sol';
import {IDepositDataRegistry} from '../../interfaces/IDepositDataRegistry.sol';
import {IVaultValidators} from '../../interfaces/IVaultValidators.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultImmutables} from './VaultImmutables.sol';
import {VaultAdmin} from './VaultAdmin.sol';
import {VaultState} from './VaultState.sol';

/**
 * @title VaultValidators
 * @author StakeWise
 * @notice Defines the validators functionality for the Vault
 */
abstract contract VaultValidators is
  VaultImmutables,
  Initializable,
  VaultAdmin,
  VaultState,
  IVaultValidators
{
  bytes32 private constant _registerValidatorsTypeHash =
    keccak256('VaultValidators(bytes32 validatorsRegistryRoot,bytes validators)');

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  address private immutable _depositDataRegistry;

  /// @custom:oz-upgrades-unsafe-allow state-variable-immutable
  uint256 private immutable _initialChainId;

  /// deprecated. Deposit data management is moved to DepositDataRegistry contract
  bytes32 private _validatorsRoot;

  /// deprecated. Deposit data management is moved to DepositDataRegistry contract
  uint256 private _validatorIndex;

  address private _validatorsManager;

  bytes32 private _initialDomainSeparator;

  /**
   * @dev Constructor
   * @dev Since the immutable variable value is stored in the bytecode,
   *      its value would be shared among all proxies pointing to a given contract instead of each proxy’s storage.
   * @param depositDataRegistry The address of the DepositDataRegistry contract
   */
  /// @custom:oz-upgrades-unsafe-allow constructor
  constructor(address depositDataRegistry) {
    _depositDataRegistry = depositDataRegistry;
    _initialChainId = block.chainid;
  }

  /// @inheritdoc IVaultValidators
  function validatorsManager() public view override returns (address) {
    // SLOAD to memory
    address validatorsManager_ = _validatorsManager;
    // if validatorsManager is not set, use DepositDataRegistry contract address
    return validatorsManager_ == address(0) ? _depositDataRegistry : validatorsManager_;
  }

  /// @inheritdoc IVaultValidators
  function registerValidators(
    IKeeperValidators.ApprovalParams calldata keeperParams,
    bytes calldata validatorsManagerSignature
  ) external override {
    // get approval from oracles
    IKeeperValidators(_keeper).approveValidators(keeperParams);

    // check vault is up to date
    _checkHarvested();

    // check access
    address validatorsManager_ = validatorsManager();
    if (
      msg.sender != validatorsManager_ &&
      !SignatureChecker.isValidSignatureNow(
        validatorsManager_,
        _getSignedMessageHash(keeperParams),
        validatorsManagerSignature
      )
    ) {
      revert Errors.AccessDenied();
    }

    // check validators length is valid
    uint256 validatorLength = _validatorLength();
    uint256 validatorsCount = keeperParams.validators.length / validatorLength;
    unchecked {
      if (
        validatorsCount == 0 || validatorsCount * validatorLength != keeperParams.validators.length
      ) {
        revert Errors.InvalidValidators();
      }
    }

    // check enough withdrawable assets
    if (withdrawableAssets() < _validatorDeposit() * validatorsCount) {
      revert Errors.InsufficientAssets();
    }

    if (keeperParams.validators.length == validatorLength) {
      // register single validator
      _registerSingleValidator(keeperParams.validators);
    } else {
      // register multiple validators
      _registerMultipleValidators(keeperParams.validators);
    }
  }

  /// @inheritdoc IVaultValidators
  function setValidatorsManager(address validatorsManager_) external override {
    _checkAdmin();
    // update validatorsManager address
    _validatorsManager = validatorsManager_;
    emit ValidatorsManagerUpdated(msg.sender, validatorsManager_);
  }

  /**
   * @dev Internal function for registering validator. Must emit ValidatorRegistered event.
   * @param validator The validator registration data
   */
  function _registerSingleValidator(bytes calldata validator) internal virtual;

  /**
   * @dev Internal function for registering multiple validators. Must emit ValidatorRegistered event for every validator.
   * @param validators The validators registration data
   */
  function _registerMultipleValidators(bytes calldata validators) internal virtual;

  /**
   * @dev Internal function for defining the length of the validator data
   * @return The length of the single validator data
   */
  function _validatorLength() internal pure virtual returns (uint256);

  /**
   * @dev Internal function for fetching validator deposit amount
   */
  function _validatorDeposit() internal pure virtual returns (uint256);

  /**
   * @dev Initializes the VaultValidators contract
   * @dev NB! This initializer must be called after VaultState initializer
   */
  function __VaultValidators_init() internal onlyInitializing {
    if (capacity() < _validatorDeposit()) revert Errors.InvalidCapacity();
    // initialize domain separator
    _initialDomainSeparator = _computeVaultValidatorsDomain();
  }

  /**
   * @dev Initializes the V2 of the VaultValidators contract
   */
  function __VaultValidators_initV2() internal onlyInitializing {
    // initialize domain separator
    _initialDomainSeparator = _computeVaultValidatorsDomain();

    // migrate deposit data variables to DepositDataRegistry contract
    IDepositDataRegistry(_depositDataRegistry).migrate(
      _validatorsRoot,
      _validatorIndex,
      _validatorsManager
    );

    // clean up variables
    delete _validatorsRoot;
    delete _validatorIndex;
    delete _validatorsManager;
  }

  /**
   * @notice Get the hash to be signed by the validators manager
   * @param keeperParams The keeper approval parameters
   * @return The hash to be signed
   */
  function _getSignedMessageHash(
    IKeeperValidators.ApprovalParams calldata keeperParams
  ) private view returns (bytes32) {
    bytes32 domainSeparator = block.chainid == _initialChainId
      ? _initialDomainSeparator
      : _computeVaultValidatorsDomain();

    return
      MessageHashUtils.toTypedDataHash(
        domainSeparator,
        keccak256(
          abi.encode(
            _registerValidatorsTypeHash,
            keeperParams.validatorsRegistryRoot,
            keccak256(keeperParams.validators)
          )
        )
      );
  }

  /**
   * @notice Computes the hash of the EIP712 typed data
   * @dev This function is used to compute the hash of the EIP712 typed data
   * @return The hash of the EIP712 typed data
   */
  function _computeVaultValidatorsDomain() private view returns (bytes32) {
    return
      keccak256(
        abi.encode(
          keccak256(
            'EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'
          ),
          keccak256(bytes('VaultValidators')),
          keccak256('1'),
          block.chainid,
          address(this)
        )
      );
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[49] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {UUPSUpgradeable} from '@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol';
import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {ERC1967Utils} from '@openzeppelin/contracts/proxy/ERC1967/ERC1967Utils.sol';
import {IVaultsRegistry} from '../../interfaces/IVaultsRegistry.sol';
import {IVaultVersion} from '../../interfaces/IVaultVersion.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultAdmin} from './VaultAdmin.sol';
import {VaultImmutables} from './VaultImmutables.sol';

/**
 * @title VaultVersion
 * @author StakeWise
 * @notice Defines the versioning functionality for the Vault
 */
abstract contract VaultVersion is
  VaultImmutables,
  Initializable,
  UUPSUpgradeable,
  VaultAdmin,
  IVaultVersion
{
  bytes4 private constant _initSelector = bytes4(keccak256('initialize(bytes)'));

  /// @inheritdoc IVaultVersion
  function implementation() external view override returns (address) {
    return ERC1967Utils.getImplementation();
  }

  /// @inheritdoc UUPSUpgradeable
  function upgradeToAndCall(
    address newImplementation,
    bytes memory data
  ) public payable override onlyProxy {
    super.upgradeToAndCall(newImplementation, abi.encodeWithSelector(_initSelector, data));
  }

  /// @inheritdoc UUPSUpgradeable
  function _authorizeUpgrade(address newImplementation) internal view override {
    _checkAdmin();
    if (
      newImplementation == address(0) ||
      ERC1967Utils.getImplementation() == newImplementation || // cannot reinit the same implementation
      IVaultVersion(newImplementation).vaultId() != vaultId() || // vault must be of the same type
      IVaultVersion(newImplementation).version() != version() + 1 || // vault cannot skip versions between
      !IVaultsRegistry(_vaultsRegistry).vaultImpls(newImplementation) // new implementation must be registered
    ) {
      revert Errors.UpgradeFailed();
    }
  }

  /// @inheritdoc IVaultVersion
  function vaultId() public pure virtual override returns (bytes32);

  /// @inheritdoc IVaultVersion
  function version() public pure virtual override returns (uint8);

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.22;

import {Initializable} from '@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol';
import {IVaultWhitelist} from '../../interfaces/IVaultWhitelist.sol';
import {Errors} from '../../libraries/Errors.sol';
import {VaultAdmin} from './VaultAdmin.sol';

/**
 * @title VaultWhitelist
 * @author StakeWise
 * @notice Defines the whitelisting functionality for the Vault
 */
abstract contract VaultWhitelist is Initializable, VaultAdmin, IVaultWhitelist {
  /// @inheritdoc IVaultWhitelist
  address public override whitelister;

  /// @inheritdoc IVaultWhitelist
  mapping(address => bool) public override whitelistedAccounts;

  /// @inheritdoc IVaultWhitelist
  function updateWhitelist(address account, bool approved) external override {
    if (msg.sender != whitelister) revert Errors.AccessDenied();
    if (whitelistedAccounts[account] == approved) return;
    whitelistedAccounts[account] = approved;
    emit WhitelistUpdated(msg.sender, account, approved);
  }

  /// @inheritdoc IVaultWhitelist
  function setWhitelister(address _whitelister) external override {
    _checkAdmin();
    _setWhitelister(_whitelister);
  }

  /**
   * @notice Internal function for checking whether account is in the whitelist
   * @param account The address of the account to check
   */
  function _checkWhitelist(address account) internal view {
    if (!whitelistedAccounts[account]) revert Errors.AccessDenied();
  }

  /**
   * @dev Internal function for updating the whitelister externally or from the initializer
   * @param _whitelister The address of the new whitelister
   */
  function _setWhitelister(address _whitelister) private {
    // update whitelister address
    whitelister = _whitelister;
    emit WhitelisterUpdated(msg.sender, _whitelister);
  }

  /**
   * @dev Initializes the VaultWhitelist contract
   * @param _whitelister The address of the whitelister
   */
  function __VaultWhitelist_init(address _whitelister) internal onlyInitializing {
    _setWhitelister(_whitelister);
  }

  /**
   * @dev This empty reserved space is put in place to allow future versions to add new
   * variables without shifting down storage in the inheritance chain.
   * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
   */
  uint256[50] private __gap;
}

{
  "viaIR": true,
  "optimizer": {
    "enabled": true,
    "runs": 200,
    "details": {
      "yul": true
    }
  },
  "evmVersion": "shanghai",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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

-----Decoded View---------------
Arg [0] : _keeper (address): 0x6B5815467da09DaA7DC83Db21c9239d98Bb487b5
Arg [1] : _vaultsRegistry (address): 0x3a0008a588772446f6e656133C2D5029CC4FC20E
Arg [2] : _validatorsRegistry (address): 0x00000000219ab540356cBB839Cbe05303d7705Fa
Arg [3] : osTokenVaultController (address): 0x2A261e60FB14586B474C208b1B7AC6D0f5000306
Arg [4] : osTokenConfig (address): 0x287d1e2A8dE183A8bf8f2b09Fa1340fBd766eb59
Arg [5] : sharedMevEscrow (address): 0x48319f97E5Da1233c21c48b80097c0FB7a20Ff86
Arg [6] : depositDataRegistry (address): 0x75AB6DdCe07556639333d3Df1eaa684F5735223e
Arg [7] : exitingAssetsClaimDelay (uint256): 86400

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000006b5815467da09daa7dc83db21c9239d98bb487b5
Arg [1] : 0000000000000000000000003a0008a588772446f6e656133c2d5029cc4fc20e
Arg [2] : 00000000000000000000000000000000219ab540356cbb839cbe05303d7705fa
Arg [3] : 0000000000000000000000002a261e60fb14586b474c208b1b7ac6d0f5000306
Arg [4] : 000000000000000000000000287d1e2a8de183a8bf8f2b09fa1340fbd766eb59
Arg [5] : 00000000000000000000000048319f97e5da1233c21c48b80097c0fb7a20ff86
Arg [6] : 00000000000000000000000075ab6ddce07556639333d3df1eaa684f5735223e
Arg [7] : 0000000000000000000000000000000000000000000000000000000000015180