// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/transparent/TransparentUpgradeableProxy.sol)
pragma solidity ^0.8.0;
import "../ERC1967/ERC1967Proxy.sol";
/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(
        address _logic,
        address admin_,
        bytes memory _data
    ) payable ERC1967Proxy(_logic, _data) {
        _changeAdmin(admin_);
    }
    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }
    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * 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 admin() external ifAdmin returns (address admin_) {
        admin_ = _getAdmin();
    }
    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * 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.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address implementation_) {
        implementation_ = _implementation();
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external virtual ifAdmin {
        _changeAdmin(newAdmin);
    }
    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeToAndCall(newImplementation, bytes(""), false);
    }
    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeToAndCall(newImplementation, data, true);
    }
    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }
    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/ERC1967/ERC1967Proxy.sol)
pragma solidity ^0.8.0;
import "../Proxy.sol";
import "./ERC1967Upgrade.sol";
/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializing the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        _upgradeToAndCall(_logic, _data, false);
    }
    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeacon.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";
/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }
    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }
    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);
    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }
    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);
    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }
    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
 * @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.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
 * @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 v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
 * @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:
 * ```
 * 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(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }
    struct BooleanSlot {
        bool value;
    }
    struct Bytes32Slot {
        bytes32 value;
    }
    struct Uint256Slot {
        uint256 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
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @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);
}

// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

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

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

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

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(address newBeacon, bytes memory data, bool forceCall) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}

// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}

// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @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.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://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/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) 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(errorMessage);
        }
    }
}

// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.

pragma solidity ^0.8.0;

/**
 * @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(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, `uint256`._
 * _Available since v4.9 for `string`, `bytes`._
 */
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
        }
    }
}

// OpenZeppelin Contracts (last updated v4.7.0) (proxy/beacon/BeaconProxy.sol)

pragma solidity ^0.8.0;

// import "./IBeacon.sol";
// import "../Proxy.sol";
// import "../ERC1967/ERC1967Upgrade.sol";

/**
 * @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}.
 *
 * The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
 * conflict with the storage layout of the implementation behind the proxy.
 *
 * _Available since v3.4._
 */
contract BeaconProxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the proxy with `beacon`.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
     * will typically be an encoded function call, and allows initializing the storage of the proxy like a Solidity
     * constructor.
     *
     * Requirements:
     *
     * - `beacon` must be a contract with the interface {IBeacon}.
     */
    constructor(address beacon, bytes memory data) payable {
        _upgradeBeaconToAndCall(beacon, data, false);
    }

    /**
     * @dev Returns the current beacon address.
     */
    function _beacon() internal view virtual returns (address) {
        return _getBeacon();
    }

    /**
     * @dev Returns the current implementation address of the associated beacon.
     */
    function _implementation() internal view virtual override returns (address) {
        return IBeacon(_getBeacon()).implementation();
    }

    /**
     * @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
     *
     * Requirements:
     *
     * - `beacon` must be a contract.
     * - The implementation returned by `beacon` must be a contract.
     */
    function _setBeacon(address beacon, bytes memory data) internal virtual {
        _upgradeBeaconToAndCall(beacon, data, false);
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "@openzeppelin/contracts/utils/Create2.sol";
import "@openzeppelin/contracts/proxy/beacon/BeaconProxy.sol";
import "@openzeppelin/contracts/proxy/beacon/IBeacon.sol";
import "@openzeppelin-upgrades/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin-upgrades/contracts/access/OwnableUpgradeable.sol";
import "../interfaces/IStrategyManager.sol";
import "../interfaces/IDelegationManager.sol";
import "../interfaces/IEigenPodManager.sol";
import "../interfaces/IETHPOSDeposit.sol";
import "../interfaces/IEigenPod.sol";
import "../interfaces/IBeaconChainOracle.sol";
import "../permissions/Pausable.sol";
import "./EigenPodPausingConstants.sol";
/**
 * @title The contract used for creating and managing EigenPods
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice The main functionalities are:
 * - creating EigenPods
 * - staking for new validators on EigenPods
 * - keeping track of the balances of all validators of EigenPods, and their stake in EigenLayer
 * - withdrawing eth when withdrawals are initiated
 */
contract EigenPodManager is Initializable, OwnableUpgradeable, Pausable, IEigenPodManager, EigenPodPausingConstants {
    /**
     * @notice Stored code of type(BeaconProxy).creationCode
     * @dev Maintained as a constant to solve an edge case - changes to OpenZeppelin's BeaconProxy code should not cause
     * addresses of EigenPods that are pre-computed with Create2 to change, even upon upgrading this contract, changing compiler version, etc.
    */
    bytes internal constant beaconProxyBytecode = hex"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";
    /// @notice The ETH2 Deposit Contract
    IETHPOSDeposit public immutable ethPOS;
    
    /// @notice Beacon proxy to which the EigenPods point
    IBeacon public immutable eigenPodBeacon;
    /// @notice EigenLayer's StrategyManager contract
    IStrategyManager public immutable strategyManager;
    /// @notice EigenLayer's Slasher contract
    ISlasher public immutable slasher;
    /// @notice Oracle contract that provides updates to the beacon chain's state
    IBeaconChainOracle public beaconChainOracle;
    
    /// @notice Pod owner to deployed EigenPod address
    mapping(address => IEigenPod) public ownerToPod;
    // BEGIN STORAGE VARIABLES ADDED AFTER FIRST TESTNET DEPLOYMENT -- DO NOT SUGGEST REORDERING TO CONVENTIONAL ORDER
    /// @notice The number of EigenPods that have been deployed
    uint256 public numPods;
    /// @notice The maximum number of EigenPods that can be deployed
    uint256 public maxPods;
    /// @notice Emitted to notify the update of the beaconChainOracle address
    event BeaconOracleUpdated(address indexed newOracleAddress);
    /// @notice Emitted to notify the deployment of an EigenPod
    event PodDeployed(address indexed eigenPod, address indexed podOwner);
    /// @notice Emitted to notify a deposit of beacon chain ETH recorded in the strategy manager
    event BeaconChainETHDeposited(address indexed podOwner, uint256 amount);
    /// @notice Emitted when `maxPods` value is updated from `previousValue` to `newValue`
    event MaxPodsUpdated(uint256 previousValue, uint256 newValue);
    modifier onlyEigenPod(address podOwner) {
        require(address(ownerToPod[podOwner]) == msg.sender, "EigenPodManager.onlyEigenPod: not a pod");
        _;
    }
    modifier onlyStrategyManager {
        require(msg.sender == address(strategyManager), "EigenPodManager.onlyStrategyManager: not strategyManager");
        _;
    }
    constructor(IETHPOSDeposit _ethPOS, IBeacon _eigenPodBeacon, IStrategyManager _strategyManager, ISlasher _slasher) {
        ethPOS = _ethPOS;
        eigenPodBeacon = _eigenPodBeacon;
        strategyManager = _strategyManager;
        slasher = _slasher;
        _disableInitializers();
    }
    function initialize(
        uint256 _maxPods,
        IBeaconChainOracle _beaconChainOracle,
        address initialOwner,
        IPauserRegistry _pauserRegistry,
        uint256 _initPausedStatus
    ) external initializer {
        _setMaxPods(_maxPods);
        _updateBeaconChainOracle(_beaconChainOracle);
        _transferOwnership(initialOwner);
        _initializePauser(_pauserRegistry, _initPausedStatus);
    }
    
    /**
     * @notice Creates an EigenPod for the sender.
     * @dev Function will revert if the `msg.sender` already has an EigenPod.
     */
    function createPod() external {
        require(!hasPod(msg.sender), "EigenPodManager.createPod: Sender already has a pod");
        // deploy a pod if the sender doesn't have one already
        _deployPod();
    }
    /**
     * @notice Stakes for a new beacon chain validator on the sender's EigenPod. 
     * Also creates an EigenPod for the sender if they don't have one already.
     * @param pubkey The 48 bytes public key of the beacon chain validator.
     * @param signature The validator's signature of the deposit data.
     * @param depositDataRoot The root/hash of the deposit data for the validator's deposit.
     */
    function stake(bytes calldata pubkey, bytes calldata signature, bytes32 depositDataRoot) external payable {
        IEigenPod pod = ownerToPod[msg.sender];
        if(address(pod) == address(0)) {
            //deploy a pod if the sender doesn't have one already
            pod = _deployPod();
        }
        pod.stake{value: msg.value}(pubkey, signature, depositDataRoot);
    }
    /**
     * @notice Deposits/Restakes beacon chain ETH in EigenLayer on behalf of the owner of an EigenPod.
     * @param podOwner The owner of the pod whose balance must be deposited.
     * @param amount The amount of ETH to 'deposit' (i.e. be credited to the podOwner).
     * @dev Callable only by the podOwner's EigenPod contract.
     */
    function restakeBeaconChainETH(address podOwner, uint256 amount) external onlyEigenPod(podOwner) {
        strategyManager.depositBeaconChainETH(podOwner, amount);
        emit BeaconChainETHDeposited(podOwner, amount);
    }
    /**
     * @notice Removes beacon chain ETH from EigenLayer on behalf of the owner of an EigenPod, when the
     *         balance of a validator is lower than how much stake they have committed to EigenLayer
     * @param podOwner The owner of the pod whose balance must be removed.
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *                                    the StrategyManager in case it must be removed from the list of the podOwner's strategies
     * @param amount The amount of beacon chain ETH to decrement from the podOwner's shares in the strategyManager.
     * @dev Callable only by the podOwner's EigenPod contract.
     */
    function recordOvercommittedBeaconChainETH(address podOwner, uint256 beaconChainETHStrategyIndex, uint256 amount) external onlyEigenPod(podOwner) {
        strategyManager.recordOvercommittedBeaconChainETH(podOwner, beaconChainETHStrategyIndex, amount);
    }
    /**
     * @notice Withdraws ETH from an EigenPod. The ETH must have first been withdrawn from the beacon chain.
     * @param podOwner The owner of the pod whose balance must be withdrawn.
     * @param recipient The recipient of the withdrawn ETH.
     * @param amount The amount of ETH to withdraw.
     * @dev Callable only by the StrategyManager contract.
     */
    function withdrawRestakedBeaconChainETH(address podOwner, address recipient, uint256 amount)
        external onlyStrategyManager onlyWhenNotPaused(PAUSED_WITHDRAW_RESTAKED_ETH)
    {
        ownerToPod[podOwner].withdrawRestakedBeaconChainETH(recipient, amount);
    }
    /**
     * Sets the maximum number of pods that can be deployed
     * @param newMaxPods The new maximum number of pods that can be deployed
     * @dev Callable by the unpauser of this contract
     */
    function setMaxPods(uint256 newMaxPods) external onlyUnpauser {
        _setMaxPods(newMaxPods);
    }
    /**
     * @notice Updates the oracle contract that provides the beacon chain state root
     * @param newBeaconChainOracle is the new oracle contract being pointed to
     * @dev Callable only by the owner of this contract (i.e. governance)
     */
    function updateBeaconChainOracle(IBeaconChainOracle newBeaconChainOracle) external onlyOwner {
        _updateBeaconChainOracle(newBeaconChainOracle);
    }
    // INTERNAL FUNCTIONS
    function _deployPod() internal onlyWhenNotPaused(PAUSED_NEW_EIGENPODS) returns (IEigenPod) {
        // check that the limit of EigenPods has not been hit, and increment the EigenPod count
        require(numPods + 1 <= maxPods, "EigenPodManager._deployPod: pod limit reached");
        ++numPods;
        // create the pod
        IEigenPod pod = 
            IEigenPod(
                Create2.deploy(
                    0, 
                    bytes32(uint256(uint160(msg.sender))), 
                    // set the beacon address to the eigenPodBeacon and initialize it
                    abi.encodePacked(
                        beaconProxyBytecode, 
                        abi.encode(eigenPodBeacon, "")
                    )
                )
            );
        pod.initialize(msg.sender);
        // store the pod in the mapping
        ownerToPod[msg.sender] = pod;
        emit PodDeployed(address(pod), msg.sender);
        return pod;
    }
    /// @notice Internal setter for `beaconChainOracle` that also emits an event
    function _updateBeaconChainOracle(IBeaconChainOracle newBeaconChainOracle) internal {
        beaconChainOracle = newBeaconChainOracle;
        emit BeaconOracleUpdated(address(newBeaconChainOracle));
    }
    /// @notice Internal setter for `maxPods` that also emits an event
    function _setMaxPods(uint256 _maxPods) internal {
        emit MaxPodsUpdated(maxPods, _maxPods);
        maxPods = _maxPods;
    }
    // VIEW FUNCTIONS
    /// @notice Returns the address of the `podOwner`'s EigenPod (whether it is deployed yet or not).
    function getPod(address podOwner) public view returns (IEigenPod) {
        IEigenPod pod = ownerToPod[podOwner];
        // if pod does not exist already, calculate what its address *will be* once it is deployed
        if (address(pod) == address(0)) {
            pod = IEigenPod(
                Create2.computeAddress(
                    bytes32(uint256(uint160(podOwner))), //salt
                    keccak256(abi.encodePacked(
                        beaconProxyBytecode, 
                        abi.encode(eigenPodBeacon, "")
                    )) //bytecode
                ));
        }
        return pod;
    }
    /// @notice Returns 'true' if the `podOwner` has created an EigenPod, and 'false' otherwise.
    function hasPod(address podOwner) public view returns (bool) {
        return address(ownerToPod[podOwner]) != address(0);
    }
    /// @notice Returns the Beacon Chain state root at `blockNumber`. Reverts if the Beacon Chain state root at `blockNumber` has not yet been finalized.
    function getBeaconChainStateRoot(uint64 blockNumber) external view returns(bytes32) {
        bytes32 stateRoot = beaconChainOracle.beaconStateRootAtBlockNumber(blockNumber);
        require(stateRoot != bytes32(0), "EigenPodManager.getBeaconChainStateRoot: state root at blockNumber not yet finalized");
        return stateRoot;
    }
    /**
     * @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[46] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Create2.sol)
pragma solidity ^0.8.0;
/**
 * @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer.
 * `CREATE2` can be used to compute in advance the address where a smart
 * contract will be deployed, which allows for interesting new mechanisms known
 * as 'counterfactual interactions'.
 *
 * See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more
 * information.
 */
library Create2 {
    /**
     * @dev Deploys a contract using `CREATE2`. The address where the contract
     * will be deployed can be known in advance via {computeAddress}.
     *
     * The bytecode for a contract can be obtained from Solidity with
     * `type(contractName).creationCode`.
     *
     * Requirements:
     *
     * - `bytecode` must not be empty.
     * - `salt` must have not been used for `bytecode` already.
     * - the factory must have a balance of at least `amount`.
     * - if `amount` is non-zero, `bytecode` must have a `payable` constructor.
     */
    function deploy(
        uint256 amount,
        bytes32 salt,
        bytes memory bytecode
    ) internal returns (address) {
        address addr;
        require(address(this).balance >= amount, "Create2: insufficient balance");
        require(bytecode.length != 0, "Create2: bytecode length is zero");
        /// @solidity memory-safe-assembly
        assembly {
            addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt)
        }
        require(addr != address(0), "Create2: Failed on deploy");
        return addr;
    }
    /**
     * @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the
     * `bytecodeHash` or `salt` will result in a new destination address.
     */
    function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) {
        return computeAddress(salt, bytecodeHash, address(this));
    }
    /**
     * @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at
     * `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}.
     */
    function computeAddress(
        bytes32 salt,
        bytes32 bytecodeHash,
        address deployer
    ) internal pure returns (address) {
        bytes32 _data = keccak256(abi.encodePacked(bytes1(0xff), deployer, salt, bytecodeHash));
        return address(uint160(uint256(_data)));
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/beacon/BeaconProxy.sol)
pragma solidity ^0.8.0;
import "./IBeacon.sol";
import "../Proxy.sol";
import "../ERC1967/ERC1967Upgrade.sol";
/**
 * @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}.
 *
 * The beacon address is stored in storage slot `uint256(keccak256('eip1967.proxy.beacon')) - 1`, so that it doesn't
 * conflict with the storage layout of the implementation behind the proxy.
 *
 * _Available since v3.4._
 */
contract BeaconProxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the proxy with `beacon`.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon. This
     * will typically be an encoded function call, and allows initializing the storage of the proxy like a Solidity
     * constructor.
     *
     * Requirements:
     *
     * - `beacon` must be a contract with the interface {IBeacon}.
     */
    constructor(address beacon, bytes memory data) payable {
        _upgradeBeaconToAndCall(beacon, data, false);
    }
    /**
     * @dev Returns the current beacon address.
     */
    function _beacon() internal view virtual returns (address) {
        return _getBeacon();
    }
    /**
     * @dev Returns the current implementation address of the associated beacon.
     */
    function _implementation() internal view virtual override returns (address) {
        return IBeacon(_getBeacon()).implementation();
    }
    /**
     * @dev Changes the proxy to use a new beacon. Deprecated: see {_upgradeBeaconToAndCall}.
     *
     * If `data` is nonempty, it's used as data in a delegate call to the implementation returned by the beacon.
     *
     * Requirements:
     *
     * - `beacon` must be a contract.
     * - The implementation returned by `beacon` must be a contract.
     */
    function _setBeacon(address beacon, bytes memory data) internal virtual {
        _upgradeBeaconToAndCall(beacon, data, false);
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
 * @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.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;
    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;
    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);
    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }
    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }
    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }
    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }
    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IStrategy.sol";
import "./ISlasher.sol";
import "./IDelegationManager.sol";
/**
 * @title Interface for the primary entrypoint for funds into EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice See the `StrategyManager` contract itself for implementation details.
 */
interface IStrategyManager {
    // packed struct for queued withdrawals; helps deal with stack-too-deep errors
    struct WithdrawerAndNonce {
        address withdrawer;
        uint96 nonce;
    }
    /**
     * Struct type used to specify an existing queued withdrawal. Rather than storing the entire struct, only a hash is stored.
     * In functions that operate on existing queued withdrawals -- e.g. `startQueuedWithdrawalWaitingPeriod` or `completeQueuedWithdrawal`,
     * the data is resubmitted and the hash of the submitted data is computed by `calculateWithdrawalRoot` and checked against the
     * stored hash in order to confirm the integrity of the submitted data.
     */
    struct QueuedWithdrawal {
        IStrategy[] strategies;
        uint256[] shares;
        address depositor;
        WithdrawerAndNonce withdrawerAndNonce;
        uint32 withdrawalStartBlock;
        address delegatedAddress;
    }
    /**
     * @notice Deposits `amount` of `token` into the specified `strategy`, with the resultant shares credited to `msg.sender`
     * @param strategy is the specified strategy where deposit is to be made,
     * @param token is the denomination in which the deposit is to be made,
     * @param amount is the amount of token to be deposited in the strategy by the depositor
     * @return shares The amount of new shares in the `strategy` created as part of the action.
     * @dev The `msg.sender` must have previously approved this contract to transfer at least `amount` of `token` on their behalf.
     * @dev Cannot be called by an address that is 'frozen' (this function will revert if the `msg.sender` is frozen).
     * 
     * WARNING: Depositing tokens that allow reentrancy (eg. ERC-777) into a strategy is not recommended.  This can lead to attack vectors
     *          where the token balance and corresponding strategy shares are not in sync upon reentrancy.
     */
    function depositIntoStrategy(IStrategy strategy, IERC20 token, uint256 amount)
        external
        returns (uint256 shares);
    /**
     * @notice Deposits `amount` of beaconchain ETH into this contract on behalf of `staker`
     * @param staker is the entity that is restaking in eigenlayer,
     * @param amount is the amount of beaconchain ETH being restaked,
     * @dev Only callable by EigenPodManager.
     */
    function depositBeaconChainETH(address staker, uint256 amount) external;
    /**
     * @notice Records an overcommitment event on behalf of a staker. The staker's beaconChainETH shares are decremented by `amount`.
     * @param overcommittedPodOwner is the pod owner to be slashed
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy in case it must be removed,
     * @param amount is the amount to decrement the slashedAddress's beaconChainETHStrategy shares
     * @dev Only callable by EigenPodManager.
     */
    function recordOvercommittedBeaconChainETH(address overcommittedPodOwner, uint256 beaconChainETHStrategyIndex, uint256 amount)
        external;
    /**
     * @notice Used for depositing an asset into the specified strategy with the resultant shares credited to `staker`,
     * who must sign off on the action.
     * Note that the assets are transferred out/from the `msg.sender`, not from the `staker`; this function is explicitly designed 
     * purely to help one address deposit 'for' another.
     * @param strategy is the specified strategy where deposit is to be made,
     * @param token is the denomination in which the deposit is to be made,
     * @param amount is the amount of token to be deposited in the strategy by the depositor
     * @param staker the staker that the deposited assets will be credited to
     * @param expiry the timestamp at which the signature expires
     * @param signature is a valid signature from the `staker`. either an ECDSA signature if the `staker` is an EOA, or data to forward
     * following EIP-1271 if the `staker` is a contract
     * @return shares The amount of new shares in the `strategy` created as part of the action.
     * @dev The `msg.sender` must have previously approved this contract to transfer at least `amount` of `token` on their behalf.
     * @dev A signature is required for this function to eliminate the possibility of griefing attacks, specifically those
     * targeting stakers who may be attempting to undelegate.
     * @dev Cannot be called on behalf of a staker that is 'frozen' (this function will revert if the `staker` is frozen).
     * 
     *  WARNING: Depositing tokens that allow reentrancy (eg. ERC-777) into a strategy is not recommended.  This can lead to attack vectors
     *          where the token balance and corresponding strategy shares are not in sync upon reentrancy
     */
    function depositIntoStrategyWithSignature(
        IStrategy strategy,
        IERC20 token,
        uint256 amount,
        address staker,
        uint256 expiry,
        bytes memory signature
    )
        external
        returns (uint256 shares);
    /// @notice Returns the current shares of `user` in `strategy`
    function stakerStrategyShares(address user, IStrategy strategy) external view returns (uint256 shares);
    /**
     * @notice Get all details on the depositor's deposits and corresponding shares
     * @return (depositor's strategies, shares in these strategies)
     */
    function getDeposits(address depositor) external view returns (IStrategy[] memory, uint256[] memory);
    /// @notice Simple getter function that returns `stakerStrategyList[staker].length`.
    function stakerStrategyListLength(address staker) external view returns (uint256);
    /**
     * @notice Called by a staker to queue a withdrawal of the given amount of `shares` from each of the respective given `strategies`.
     * @dev Stakers will complete their withdrawal by calling the 'completeQueuedWithdrawal' function.
     * User shares are decreased in this function, but the total number of shares in each strategy remains the same.
     * The total number of shares is decremented in the 'completeQueuedWithdrawal' function instead, which is where
     * the funds are actually sent to the user through use of the strategies' 'withdrawal' function. This ensures
     * that the value per share reported by each strategy will remain consistent, and that the shares will continue
     * to accrue gains during the enforced withdrawal waiting period.
     * @param strategyIndexes is a list of the indices in `stakerStrategyList[msg.sender]` that correspond to the strategies
     * for which `msg.sender` is withdrawing 100% of their shares
     * @param strategies The Strategies to withdraw from
     * @param shares The amount of shares to withdraw from each of the respective Strategies in the `strategies` array
     * @param withdrawer The address that can complete the withdrawal and will receive any withdrawn funds or shares upon completing the withdrawal
     * @param undelegateIfPossible If this param is marked as 'true' *and the withdrawal will result in `msg.sender` having no shares in any Strategy,*
     * then this function will also make an internal call to `undelegate(msg.sender)` to undelegate the `msg.sender`.
     * @return The 'withdrawalRoot' of the newly created Queued Withdrawal
     * @dev Strategies are removed from `stakerStrategyList` by swapping the last entry with the entry to be removed, then
     * popping off the last entry in `stakerStrategyList`. The simplest way to calculate the correct `strategyIndexes` to input
     * is to order the strategies *for which `msg.sender` is withdrawing 100% of their shares* from highest index in
     * `stakerStrategyList` to lowest index
     * @dev Note that if the withdrawal includes shares in the enshrined 'beaconChainETH' strategy, then it must *only* include shares in this strategy, and
     * `withdrawer` must match the caller's address. The first condition is because slashing of queued withdrawals cannot be guaranteed 
     * for Beacon Chain ETH (since we cannot trigger a withdrawal from the beacon chain through a smart contract) and the second condition is because shares in
     * the enshrined 'beaconChainETH' strategy technically represent non-fungible positions (deposits to the Beacon Chain, each pointed at a specific EigenPod).
     */
    function queueWithdrawal(
        uint256[] calldata strategyIndexes,
        IStrategy[] calldata strategies,
        uint256[] calldata shares,
        address withdrawer,
        bool undelegateIfPossible
    )
        external returns(bytes32);
        
    /**
     * @notice Used to complete the specified `queuedWithdrawal`. The function caller must match `queuedWithdrawal.withdrawer`
     * @param queuedWithdrawal The QueuedWithdrawal to complete.
     * @param tokens Array in which the i-th entry specifies the `token` input to the 'withdraw' function of the i-th Strategy in the `strategies` array
     * of the `queuedWithdrawal`. This input can be provided with zero length if `receiveAsTokens` is set to 'false' (since in that case, this input will be unused)
     * @param middlewareTimesIndex is the index in the operator that the staker who triggered the withdrawal was delegated to's middleware times array
     * @param receiveAsTokens If true, the shares specified in the queued withdrawal will be withdrawn from the specified strategies themselves
     * and sent to the caller, through calls to `queuedWithdrawal.strategies[i].withdraw`. If false, then the shares in the specified strategies
     * will simply be transferred to the caller directly.
     * @dev middlewareTimesIndex should be calculated off chain before calling this function by finding the first index that satisfies `slasher.canWithdraw`
     */
    function completeQueuedWithdrawal(
        QueuedWithdrawal calldata queuedWithdrawal,
        IERC20[] calldata tokens,
        uint256 middlewareTimesIndex,
        bool receiveAsTokens
    )
        external;
    
    /**
     * @notice Used to complete the specified `queuedWithdrawals`. The function caller must match `queuedWithdrawals[...].withdrawer`
     * @param queuedWithdrawals The QueuedWithdrawals to complete.
     * @param tokens Array of tokens for each QueuedWithdrawal. See `completeQueuedWithdrawal` for the usage of a single array.
     * @param middlewareTimesIndexes One index to reference per QueuedWithdrawal. See `completeQueuedWithdrawal` for the usage of a single index.
     * @param receiveAsTokens If true, the shares specified in the queued withdrawal will be withdrawn from the specified strategies themselves
     * and sent to the caller, through calls to `queuedWithdrawal.strategies[i].withdraw`. If false, then the shares in the specified strategies
     * will simply be transferred to the caller directly.
     * @dev Array-ified version of `completeQueuedWithdrawal`
     * @dev middlewareTimesIndex should be calculated off chain before calling this function by finding the first index that satisfies `slasher.canWithdraw`
     */
    function completeQueuedWithdrawals(
        QueuedWithdrawal[] calldata queuedWithdrawals,
        IERC20[][] calldata tokens,
        uint256[] calldata middlewareTimesIndexes,
        bool[] calldata receiveAsTokens
    )
        external;
    /**
     * @notice Slashes the shares of a 'frozen' operator (or a staker delegated to one)
     * @param slashedAddress is the frozen address that is having its shares slashed
     * @param recipient is the address that will receive the slashed funds, which could e.g. be a harmed party themself,
     * or a MerkleDistributor-type contract that further sub-divides the slashed funds.
     * @param strategies Strategies to slash
     * @param shareAmounts The amount of shares to slash in each of the provided `strategies`
     * @param tokens The tokens to use as input to the `withdraw` function of each of the provided `strategies`
     * @param strategyIndexes is a list of the indices in `stakerStrategyList[msg.sender]` that correspond to the strategies
     * for which `msg.sender` is withdrawing 100% of their shares
     * @param recipient The slashed funds are withdrawn as tokens to this address.
     * @dev strategies are removed from `stakerStrategyList` by swapping the last entry with the entry to be removed, then
     * popping off the last entry in `stakerStrategyList`. The simplest way to calculate the correct `strategyIndexes` to input
     * is to order the strategies *for which `msg.sender` is withdrawing 100% of their shares* from highest index in
     * `stakerStrategyList` to lowest index
     */
    function slashShares(
        address slashedAddress,
        address recipient,
        IStrategy[] calldata strategies,
        IERC20[] calldata tokens,
        uint256[] calldata strategyIndexes,
        uint256[] calldata shareAmounts
    )
        external;
    /**
     * @notice Slashes an existing queued withdrawal that was created by a 'frozen' operator (or a staker delegated to one)
     * @param recipient The funds in the slashed withdrawal are withdrawn as tokens to this address.
     * @param queuedWithdrawal The previously queued withdrawal to be slashed
     * @param tokens Array in which the i-th entry specifies the `token` input to the 'withdraw' function of the i-th Strategy in the `strategies`
     * array of the `queuedWithdrawal`.
     * @param indicesToSkip Optional input parameter -- indices in the `strategies` array to skip (i.e. not call the 'withdraw' function on). This input exists
     * so that, e.g., if the slashed QueuedWithdrawal contains a malicious strategy in the `strategies` array which always reverts on calls to its 'withdraw' function,
     * then the malicious strategy can be skipped (with the shares in effect "burned"), while the non-malicious strategies are still called as normal.
     */
    function slashQueuedWithdrawal(address recipient, QueuedWithdrawal calldata queuedWithdrawal, IERC20[] calldata tokens, uint256[] calldata indicesToSkip)
        external;
    /// @notice Returns the keccak256 hash of `queuedWithdrawal`.
    function calculateWithdrawalRoot(
        QueuedWithdrawal memory queuedWithdrawal
    )
        external
        pure
        returns (bytes32);
    /**
     * @notice Owner-only function that adds the provided Strategies to the 'whitelist' of strategies that stakers can deposit into
     * @param strategiesToWhitelist Strategies that will be added to the `strategyIsWhitelistedForDeposit` mapping (if they aren't in it already)
    */
    function addStrategiesToDepositWhitelist(IStrategy[] calldata strategiesToWhitelist) external;
    /**
     * @notice Owner-only function that removes the provided Strategies from the 'whitelist' of strategies that stakers can deposit into
     * @param strategiesToRemoveFromWhitelist Strategies that will be removed to the `strategyIsWhitelistedForDeposit` mapping (if they are in it)
    */
    function removeStrategiesFromDepositWhitelist(IStrategy[] calldata strategiesToRemoveFromWhitelist) external;
    /// @notice Returns the single, central Delegation contract of EigenLayer
    function delegation() external view returns (IDelegationManager);
    /// @notice Returns the single, central Slasher contract of EigenLayer
    function slasher() external view returns (ISlasher);
    /// @notice returns the enshrined, virtual 'beaconChainETH' Strategy
    function beaconChainETHStrategy() external view returns (IStrategy);
    /// @notice Returns the number of blocks that must pass between the time a withdrawal is queued and the time it can be completed
    function withdrawalDelayBlocks() external view returns (uint256);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IDelegationTerms.sol";
/**
 * @title The interface for the primary delegation contract for EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice  This is the contract for delegation in EigenLayer. The main functionalities of this contract are
 * - enabling anyone to register as an operator in EigenLayer
 * - allowing new operators to provide a DelegationTerms-type contract, which may mediate their interactions with stakers who delegate to them
 * - enabling any staker to delegate its stake to the operator of its choice
 * - enabling a staker to undelegate its assets from an operator (performed as part of the withdrawal process, initiated through the StrategyManager)
 */
interface IDelegationManager {
    /**
     * @notice This will be called by an operator to register itself as an operator that stakers can choose to delegate to.
     * @param dt is the `DelegationTerms` contract that the operator has for those who delegate to them.
     * @dev An operator can set `dt` equal to their own address (or another EOA address), in the event that they want to split payments
     * in a more 'trustful' manner.
     * @dev In the present design, once set, there is no way for an operator to ever modify the address of their DelegationTerms contract.
     */
    function registerAsOperator(IDelegationTerms dt) external;
    /**
     *  @notice This will be called by a staker to delegate its assets to some operator.
     *  @param operator is the operator to whom staker (msg.sender) is delegating its assets
     */
    function delegateTo(address operator) external;
    /**
     * @notice Delegates from `staker` to `operator`.
     * @dev requires that:
     * 1) if `staker` is an EOA, then `signature` is valid ECDSA signature from `staker`, indicating their intention for this action
     * 2) if `staker` is a contract, then `signature` must will be checked according to EIP-1271
     */
    function delegateToBySignature(address staker, address operator, uint256 expiry, bytes memory signature) external;
    /**
     * @notice Undelegates `staker` from the operator who they are delegated to.
     * @notice Callable only by the StrategyManager
     * @dev Should only ever be called in the event that the `staker` has no active deposits in EigenLayer.
     */
    function undelegate(address staker) external;
    /// @notice returns the address of the operator that `staker` is delegated to.
    function delegatedTo(address staker) external view returns (address);
    /// @notice returns the DelegationTerms of the `operator`, which may mediate their interactions with stakers who delegate to them.
    function delegationTerms(address operator) external view returns (IDelegationTerms);
    /// @notice returns the total number of shares in `strategy` that are delegated to `operator`.
    function operatorShares(address operator, IStrategy strategy) external view returns (uint256);
    /**
     * @notice Increases the `staker`'s delegated shares in `strategy` by `shares, typically called when the staker has further deposits into EigenLayer
     * @dev Callable only by the StrategyManager
     */
    function increaseDelegatedShares(address staker, IStrategy strategy, uint256 shares) external;
    /**
     * @notice Decreases the `staker`'s delegated shares in each entry of `strategies` by its respective `shares[i]`, typically called when the staker withdraws from EigenLayer
     * @dev Callable only by the StrategyManager
     */
    function decreaseDelegatedShares(
        address staker,
        IStrategy[] calldata strategies,
        uint256[] calldata shares
    ) external;
    /// @notice Returns 'true' if `staker` *is* actively delegated, and 'false' otherwise.
    function isDelegated(address staker) external view returns (bool);
    /// @notice Returns 'true' if `staker` is *not* actively delegated, and 'false' otherwise.
    function isNotDelegated(address staker) external view returns (bool);
    /// @notice Returns if an operator can be delegated to, i.e. it has called `registerAsOperator`.
    function isOperator(address operator) external view returns (bool);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IStrategyManager.sol";
import "./IEigenPod.sol";
import "./IBeaconChainOracle.sol";
import "./IPausable.sol";
/**
 * @title Interface for factory that creates and manages solo staking pods that have their withdrawal credentials pointed to EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface IEigenPodManager is IPausable {
    /**
     * @notice Creates an EigenPod for the sender.
     * @dev Function will revert if the `msg.sender` already has an EigenPod.
     */
    function createPod() external;
    /**
     * @notice Stakes for a new beacon chain validator on the sender's EigenPod. 
     * Also creates an EigenPod for the sender if they don't have one already.
     * @param pubkey The 48 bytes public key of the beacon chain validator.
     * @param signature The validator's signature of the deposit data.
     * @param depositDataRoot The root/hash of the deposit data for the validator's deposit.
     */
    function stake(bytes calldata pubkey, bytes calldata signature, bytes32 depositDataRoot) external payable;
    /**
     * @notice Deposits/Restakes beacon chain ETH in EigenLayer on behalf of the owner of an EigenPod.
     * @param podOwner The owner of the pod whose balance must be deposited.
     * @param amount The amount of ETH to 'deposit' (i.e. be credited to the podOwner).
     * @dev Callable only by the podOwner's EigenPod contract.
     */
    function restakeBeaconChainETH(address podOwner, uint256 amount) external;
    /**
     * @notice Removes beacon chain ETH from EigenLayer on behalf of the owner of an EigenPod, when the
     *         balance of a validator is lower than how much stake they have committed to EigenLayer
     * @param podOwner The owner of the pod whose balance must be removed.
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *                                    the StrategyManager in case it must be removed from the list of the podOwner's strategies
     * @param amount The amount of ETH to remove.
     * @dev Callable only by the podOwner's EigenPod contract.
     */
    function recordOvercommittedBeaconChainETH(address podOwner, uint256 beaconChainETHStrategyIndex, uint256 amount) external;
    
    /**
     * @notice Withdraws ETH from an EigenPod. The ETH must have first been withdrawn from the beacon chain.
     * @param podOwner The owner of the pod whose balance must be withdrawn.
     * @param recipient The recipient of the withdrawn ETH.
     * @param amount The amount of ETH to withdraw.
     * @dev Callable only by the StrategyManager contract.
     */
    function withdrawRestakedBeaconChainETH(address podOwner, address recipient, uint256 amount) external;
    /**
     * @notice Updates the oracle contract that provides the beacon chain state root
     * @param newBeaconChainOracle is the new oracle contract being pointed to
     * @dev Callable only by the owner of this contract (i.e. governance)
     */
    function updateBeaconChainOracle(IBeaconChainOracle newBeaconChainOracle) external;
    /// @notice Returns the address of the `podOwner`'s EigenPod if it has been deployed.
    function ownerToPod(address podOwner) external view returns(IEigenPod);
    /// @notice Returns the address of the `podOwner`'s EigenPod (whether it is deployed yet or not).
    function getPod(address podOwner) external view returns(IEigenPod);
    /// @notice Oracle contract that provides updates to the beacon chain's state
    function beaconChainOracle() external view returns(IBeaconChainOracle);    
    /// @notice Returns the Beacon Chain state root at `blockNumber`. Reverts if the Beacon Chain state root at `blockNumber` has not yet been finalized.
    function getBeaconChainStateRoot(uint64 blockNumber) external view returns(bytes32);
    /// @notice EigenLayer's StrategyManager contract
    function strategyManager() external view returns(IStrategyManager);
    /// @notice EigenLayer's Slasher contract
    function slasher() external view returns(ISlasher);
    function hasPod(address podOwner) external view returns (bool);
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// SPDX-License-Identifier: CC0-1.0
pragma solidity =0.8.12;
// This interface is designed to be compatible with the Vyper version.
/// @notice This is the Ethereum 2.0 deposit contract interface.
/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs
interface IETHPOSDeposit {
    /// @notice A processed deposit event.
    event DepositEvent(bytes pubkey, bytes withdrawal_credentials, bytes amount, bytes signature, bytes index);
    /// @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;
    /// @notice Query the current deposit root hash.
    /// @return The deposit root hash.
    function get_deposit_root() external view returns (bytes32);
    /// @notice Query the current deposit count.
    /// @return The deposit count encoded as a little endian 64-bit number.
    function get_deposit_count() external view returns (bytes memory);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "../libraries/BeaconChainProofs.sol";
import "./IEigenPodManager.sol";
import "./IBeaconChainOracle.sol";
/**
 * @title The implementation contract used for restaking beacon chain ETH on EigenLayer 
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice The main functionalities are:
 * - creating new ETH validators with their withdrawal credentials pointed to this contract
 * - proving from beacon chain state roots that withdrawal credentials are pointed to this contract
 * - proving from beacon chain state roots the balances of ETH validators with their withdrawal credentials
 *   pointed to this contract
 * - updating aggregate balances in the EigenPodManager
 * - withdrawing eth when withdrawals are initiated
 * @dev Note that all beacon chain balances are stored as gwei within the beacon chain datastructures. We choose
 *   to account balances in terms of gwei in the EigenPod contract and convert to wei when making calls to other contracts
 */
interface IEigenPod {
    enum VALIDATOR_STATUS {
        INACTIVE, // doesnt exist
        ACTIVE, // staked on ethpos and withdrawal credentials are pointed to the EigenPod
        OVERCOMMITTED, // proven to be overcommitted to EigenLayer
        WITHDRAWN // withdrawn from the Beacon Chain
    }
    // this struct keeps track of PartialWithdrawalClaims
    struct PartialWithdrawalClaim {
        PARTIAL_WITHDRAWAL_CLAIM_STATUS status;
        // block at which the PartialWithdrawalClaim was created
        uint32 creationBlockNumber;
        // last block (inclusive) in which the PartialWithdrawalClaim can be fraudproofed
        uint32 fraudproofPeriodEndBlockNumber;
        // amount of ETH -- in Gwei -- to be withdrawn until completion of this claim
        uint64 partialWithdrawalAmountGwei;
    }
    enum PARTIAL_WITHDRAWAL_CLAIM_STATUS {
        REDEEMED,
        PENDING,
        FAILED
    }
    /// @notice The amount of eth, in gwei, that is restaked per validator
    function REQUIRED_BALANCE_GWEI() external view returns(uint64);
    /// @notice The amount of eth, in wei, that is restaked per validator
    function REQUIRED_BALANCE_WEI() external view returns(uint256);
    /// @notice this is a mapping of validator indices to a Validator struct containing pertinent info about the validator
    function validatorStatus(uint40 validatorIndex) external view returns(VALIDATOR_STATUS);
    /// @notice the amount of execution layer ETH in this contract that is staked in EigenLayer (i.e. withdrawn from beaconchain but not EigenLayer), 
    function restakedExecutionLayerGwei() external view returns(uint64);
    /// @notice Used to initialize the pointers to contracts crucial to the pod's functionality, in beacon proxy construction from EigenPodManager
    function initialize(address owner) external;
    /// @notice Called by EigenPodManager when the owner wants to create another ETH validator.
    function stake(bytes calldata pubkey, bytes calldata signature, bytes32 depositDataRoot) external payable;
    /**
     * @notice Transfers `amountWei` in ether from this contract to the specified `recipient` address
     * @notice Called by EigenPodManager to withdrawBeaconChainETH that has been added to the EigenPod's balance due to a withdrawal from the beacon chain.
     * @dev Called during withdrawal or slashing.
     * @dev Note that this function is marked as non-reentrant to prevent the recipient calling back into it
     */
    function withdrawRestakedBeaconChainETH(address recipient, uint256 amount) external;
    /// @notice The single EigenPodManager for EigenLayer
    function eigenPodManager() external view returns (IEigenPodManager);
    /// @notice The owner of this EigenPod
    function podOwner() external view returns (address);
    /// @notice an indicator of whether or not the podOwner has ever "fully restaked" by successfully calling `verifyCorrectWithdrawalCredentials`.
    function hasRestaked() external view returns (bool);
    /// @notice block number of the most recent withdrawal
    function mostRecentWithdrawalBlockNumber() external view returns (uint64);
    ///@notice mapping that tracks proven partial withdrawals
    function provenPartialWithdrawal(uint40 validatorIndex, uint64 slot) external view returns (bool);
    /**
     * @notice This function verifies that the withdrawal credentials of the podOwner are pointed to
     * this contract. It also verifies the current (not effective) balance  of the validator.  It verifies the provided proof of the ETH validator against the beacon chain state
     * root, marks the validator as 'active' in EigenLayer, and credits the restaked ETH in Eigenlayer.
     * @param oracleBlockNumber is the Beacon Chain blockNumber whose state root the `proof` will be proven against.
     * @param validatorIndex is the index of the validator being proven, refer to consensus specs 
     * @param proofs is the bytes that prove the ETH validator's balance and withdrawal credentials against a beacon chain state root
     * @param validatorFields are the fields of the "Validator Container", refer to consensus specs 
     * for details: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
     */
    function verifyWithdrawalCredentialsAndBalance(
        uint64 oracleBlockNumber,
        uint40 validatorIndex,
        BeaconChainProofs.ValidatorFieldsAndBalanceProofs memory proofs,
        bytes32[] calldata validatorFields
    ) external;
    
    /**
     * @notice This function records an overcommitment of stake to EigenLayer on behalf of a certain ETH validator.
     *         If successful, the overcommitted balance is penalized (available for withdrawal whenever the pod's balance allows).
     *         The ETH validator's shares in the enshrined beaconChainETH strategy are also removed from the StrategyManager and undelegated.
     * @param oracleBlockNumber The oracleBlockNumber whose state root the `proof` will be proven against.
     *        Must be within `VERIFY_OVERCOMMITTED_WINDOW_BLOCKS` of the current block.
     * @param validatorIndex is the index of the validator being proven, refer to consensus specs 
     * @param proofs is the proof of the validator's balance and validatorFields in the balance tree and the balanceRoot to prove for
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *                                    the StrategyManager in case it must be removed from the list of the podOwners strategies
     * @param validatorFields are the fields of the "Validator Container", refer to consensus specs
     * @dev For more details on the Beacon Chain spec, see: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
     */
    function verifyOvercommittedStake(
        uint40 validatorIndex,
        BeaconChainProofs.ValidatorFieldsAndBalanceProofs calldata proofs,
        bytes32[] calldata validatorFields,
        uint256 beaconChainETHStrategyIndex,
        uint64 oracleBlockNumber
    ) external;
    /**
     * @notice This function records a full withdrawal on behalf of one of the Ethereum validators for this EigenPod
     * @param withdrawalProofs is the information needed to check the veracity of the block number and withdrawal being proven
     * @param validatorFieldsProof is the proof of the validator's fields in the validator tree
     * @param withdrawalFields are the fields of the withdrawal being proven
     * @param validatorFields are the fields of the validator being proven
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *        the EigenPodManager to the StrategyManager in case it must be removed from the podOwner's list of strategies
     */
    function verifyAndProcessWithdrawal(
        BeaconChainProofs.WithdrawalProofs calldata withdrawalProofs, 
        bytes calldata validatorFieldsProof,
        bytes32[] calldata validatorFields,
        bytes32[] calldata withdrawalFields,
        uint256 beaconChainETHStrategyIndex,
        uint64 oracleBlockNumber
    ) external;
    /// @notice Called by the pod owner to withdraw the balance of the pod when `hasRestaked` is set to false
    function withdrawBeforeRestaking() external;
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Interface for the BeaconStateOracle contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface IBeaconChainOracle {
    /// @notice Largest blockNumber that has been confirmed by the oracle.
    function latestConfirmedOracleBlockNumber() external view returns(uint64);
    /// @notice Mapping: Beacon Chain blockNumber => the Beacon Chain state root at the specified blockNumber.
    /// @dev This will return `bytes32(0)` if the state root at the specified blockNumber is not yet confirmed.
    function beaconStateRootAtBlockNumber(uint64 blockNumber) external view returns(bytes32);
    /// @notice Mapping: address => whether or not the address is in the set of oracle signers.
    function isOracleSigner(address _oracleSigner) external view returns(bool);
    /// @notice Mapping: Beacon Chain blockNumber => oracle signer address => whether or not the oracle signer has voted on the state root at the blockNumber.
    function hasVoted(uint64 blockNumber, address oracleSigner) external view returns(bool);
    /// @notice Mapping: Beacon Chain blockNumber => state root => total number of oracle signer votes for the state root at the blockNumber. 
    function stateRootVotes(uint64 blockNumber, bytes32 stateRoot) external view returns(uint256);
    /// @notice Total number of members of the set of oracle signers.
    function totalOracleSigners() external view returns(uint256);
    /**
     * @notice Number of oracle signers that must vote for a state root in order for the state root to be confirmed.
     * Adjustable by this contract's owner through use of the `setThreshold` function.
     * @dev We note that there is an edge case -- when the threshold is adjusted downward, if a state root already has enough votes to meet the *new* threshold,
     * the state root must still receive one additional vote from an oracle signer to be confirmed. This behavior is intended, to minimize unexpected root confirmations.
     */
    function threshold() external view returns(uint256);
    /**
     * @notice Owner-only function used to modify the value of the `threshold` variable.
     * @param _threshold Desired new value for the `threshold` variable. Function will revert if this is set to zero.
     */
    function setThreshold(uint256 _threshold) external;
    /**
     * @notice Owner-only function used to add a signer to the set of oracle signers.
     * @param _oracleSigners Array of address to be added to the set.
     * @dev Function will have no effect on the i-th input address if `_oracleSigners[i]`is already in the set of oracle signers.
     */
    function addOracleSigners(address[] memory _oracleSigners) external;
    /**
     * @notice Owner-only function used to remove a signer from the set of oracle signers.
     * @param _oracleSigners Array of address to be removed from the set.
     * @dev Function will have no effect on the i-th input address if `_oracleSigners[i]`is already not in the set of oracle signers.
     */
    function removeOracleSigners(address[] memory _oracleSigners) external;
    /**
     * @notice Called by a member of the set of oracle signers to assert that the Beacon Chain state root is `stateRoot` at `blockNumber`.
     * @dev The state root will be finalized once the total number of votes *for this exact state root at this exact blockNumber* meets the `threshold` value.
     * @param blockNumber The Beacon Chain blockNumber of interest.
     * @param stateRoot The Beacon Chain state root that the caller asserts was the correct root, at the specified `blockNumber`.
     */
    function voteForBeaconChainStateRoot(uint64 blockNumber, bytes32 stateRoot) external;
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "../interfaces/IPausable.sol";
/**
 * @title Adds pausability to a contract, with pausing & unpausing controlled by the `pauser` and `unpauser` of a PauserRegistry contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice Contracts that inherit from this contract may define their own `pause` and `unpause` (and/or related) functions.
 * These functions should be permissioned as "onlyPauser" which defers to a `PauserRegistry` for determining access control.
 * @dev Pausability is implemented using a uint256, which allows up to 256 different single bit-flags; each bit can potentially pause different functionality.
 * Inspiration for this was taken from the NearBridge design here https://etherscan.io/address/0x3FEFc5A4B1c02f21cBc8D3613643ba0635b9a873#code.
 * For the `pause` and `unpause` functions we've implemented, if you pause, you can only flip (any number of) switches to on/1 (aka "paused"), and if you unpause,
 * you can only flip (any number of) switches to off/0 (aka "paused").
 * If you want a pauseXYZ function that just flips a single bit / "pausing flag", it will:
 * 1) 'bit-wise and' (aka `&`) a flag with the current paused state (as a uint256)
 * 2) update the paused state to this new value
 * @dev We note as well that we have chosen to identify flags by their *bit index* as opposed to their numerical value, so, e.g. defining `DEPOSITS_PAUSED = 3`
 * indicates specifically that if the *third bit* of `_paused` is flipped -- i.e. it is a '1' -- then deposits should be paused
 */
contract Pausable is IPausable {
    /// @notice Address of the `PauserRegistry` contract that this contract defers to for determining access control (for pausing).
    IPauserRegistry public pauserRegistry;
    /// @dev whether or not the contract is currently paused
    uint256 private _paused;
    uint256 constant internal UNPAUSE_ALL = 0;
    uint256 constant internal PAUSE_ALL = type(uint256).max;
    /// @notice Emitted when the `pauserRegistry` is set to `newPauserRegistry`.
    event PauserRegistrySet(IPauserRegistry pauserRegistry, IPauserRegistry newPauserRegistry);
    /// @notice Emitted when the pause is triggered by `account`, and changed to `newPausedStatus`.
    event Paused(address indexed account, uint256 newPausedStatus);
    /// @notice Emitted when the pause is lifted by `account`, and changed to `newPausedStatus`.
    event Unpaused(address indexed account, uint256 newPausedStatus);
    /// @notice
    modifier onlyPauser() {
        require(pauserRegistry.isPauser(msg.sender), "msg.sender is not permissioned as pauser");
        _;
    }
    modifier onlyUnpauser() {
        require(msg.sender == pauserRegistry.unpauser(), "msg.sender is not permissioned as unpauser");
        _;
    }
    /// @notice Throws if the contract is paused, i.e. if any of the bits in `_paused` is flipped to 1.
    modifier whenNotPaused() {
        require(_paused == 0, "Pausable: contract is paused");
        _;
    }
    /// @notice Throws if the `indexed`th bit of `_paused` is 1, i.e. if the `index`th pause switch is flipped.
    modifier onlyWhenNotPaused(uint8 index) {
        require(!paused(index), "Pausable: index is paused");
        _;
    }
    /// @notice One-time function for setting the `pauserRegistry` and initializing the value of `_paused`.
    function _initializePauser(IPauserRegistry _pauserRegistry, uint256 initPausedStatus) internal {
        require(
            address(pauserRegistry) == address(0) && address(_pauserRegistry) != address(0),
            "Pausable._initializePauser: _initializePauser() can only be called once"
        );
        _paused = initPausedStatus;
        emit Paused(msg.sender, initPausedStatus);
        _setPauserRegistry(_pauserRegistry);
    }
    /**
     * @notice This function is used to pause an EigenLayer contract's functionality.
     * It is permissioned to the `pauser` address, which is expected to be a low threshold multisig.
     * @param newPausedStatus represents the new value for `_paused` to take, which means it may flip several bits at once.
     * @dev This function can only pause functionality, and thus cannot 'unflip' any bit in `_paused` from 1 to 0.
     */
    function pause(uint256 newPausedStatus) external onlyPauser {
        // verify that the `newPausedStatus` does not *unflip* any bits (i.e. doesn't unpause anything, all 1 bits remain)
        require((_paused & newPausedStatus) == _paused, "Pausable.pause: invalid attempt to unpause functionality");
        _paused = newPausedStatus;
        emit Paused(msg.sender, newPausedStatus);
    }
    /**
     * @notice Alias for `pause(type(uint256).max)`.
     */
    function pauseAll() external onlyPauser {
        _paused = type(uint256).max;
        emit Paused(msg.sender, type(uint256).max);
    }
    /**
     * @notice This function is used to unpause an EigenLayer contract's functionality.
     * It is permissioned to the `unpauser` address, which is expected to be a high threshold multisig or governance contract.
     * @param newPausedStatus represents the new value for `_paused` to take, which means it may flip several bits at once.
     * @dev This function can only unpause functionality, and thus cannot 'flip' any bit in `_paused` from 0 to 1.
     */
    function unpause(uint256 newPausedStatus) external onlyUnpauser {
        // verify that the `newPausedStatus` does not *flip* any bits (i.e. doesn't pause anything, all 0 bits remain)
        require(((~_paused) & (~newPausedStatus)) == (~_paused), "Pausable.unpause: invalid attempt to pause functionality");
        _paused = newPausedStatus;
        emit Unpaused(msg.sender, newPausedStatus);
    }
    /// @notice Returns the current paused status as a uint256.
    function paused() public view virtual returns (uint256) {
        return _paused;
    }
    /// @notice Returns 'true' if the `indexed`th bit of `_paused` is 1, and 'false' otherwise
    function paused(uint8 index) public view virtual returns (bool) {
        uint256 mask = 1 << index;
        return ((_paused & mask) == mask);
    }
    /// @notice Allows the unpauser to set a new pauser registry
    function setPauserRegistry(IPauserRegistry newPauserRegistry) external onlyUnpauser {
        _setPauserRegistry(newPauserRegistry);
    }
    /// internal function for setting pauser registry
    function _setPauserRegistry(IPauserRegistry newPauserRegistry) internal {
        require(address(newPauserRegistry) != address(0), "Pausable._setPauserRegistry: newPauserRegistry cannot be the zero address");
        emit PauserRegistrySet(pauserRegistry, newPauserRegistry);
        pauserRegistry = newPauserRegistry;
    }
    /**
     * @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 =0.8.12;
/**
 * @title Constants shared between 'EigenPod' and 'EigenPodManager' contracts.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
abstract contract EigenPodPausingConstants {
    /// @notice Index for flag that pauses creation of new EigenPods when set. See EigenPodManager code for details.
    uint8 internal constant PAUSED_NEW_EIGENPODS = 0;
    /// @notice Index for flag that pauses the `withdrawRestakedBeaconChainETH` function *of the EigenPodManager* when set. See EigenPodManager code for details.
    uint8 internal constant PAUSED_WITHDRAW_RESTAKED_ETH = 1;
    /// @notice Index for flag that pauses the `verifyCorrectWithdrawalCredentials` function *of the EigenPods* when set. see EigenPod code for details.
    uint8 internal constant PAUSED_EIGENPODS_VERIFY_CREDENTIALS = 2;
    /// @notice Index for flag that pauses the `verifyOvercommittedStake` function *of the EigenPods* when set. see EigenPod code for details.
    uint8 internal constant PAUSED_EIGENPODS_VERIFY_OVERCOMMITTED = 3;
    /// @notice Index for flag that pauses the `verifyBeaconChainFullWithdrawal` function *of the EigenPods* when set. see EigenPod code for details.
    uint8 internal constant PAUSED_EIGENPODS_VERIFY_WITHDRAWAL = 4;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/Proxy.sol)
pragma solidity ^0.8.0;
/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())
            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)
            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())
            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }
    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback function
     * and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);
    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if call data
     * is empty.
     */
    receive() external payable virtual {
        _fallback();
    }
    /**
     * @dev Hook that is called before falling back to the implementation. Can happen as part of a manual `_fallback`
     * call, or as part of the Solidity `fallback` or `receive` functions.
     *
     * If overridden should call `super._beforeFallback()`.
     */
    function _beforeFallback() internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeacon.sol";
import "../../interfaces/draft-IERC1822.sol";
import "../../utils/Address.sol";
import "../../utils/StorageSlot.sol";
/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967Upgrade {
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }
    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(newImplementation, data);
        }
    }
    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlot.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822Proxiable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }
    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);
    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlot.getAddressSlot(_ADMIN_SLOT).value;
    }
    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlot.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }
    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }
    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);
    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlot.getAddressSlot(_BEACON_SLOT).value;
    }
    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(Address.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            Address.isContract(IBeacon(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlot.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }
    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            Address.functionDelegateCall(IBeacon(newBeacon).implementation(), data);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }
    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
 * @title Minimal interface for an `Strategy` contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice Custom `Strategy` implementations may expand extensively on this interface.
 */
interface IStrategy {
    /**
     * @notice Used to deposit tokens into this Strategy
     * @param token is the ERC20 token being deposited
     * @param amount is the amount of token being deposited
     * @dev This function is only callable by the strategyManager contract. It is invoked inside of the strategyManager's
     * `depositIntoStrategy` function, and individual share balances are recorded in the strategyManager as well.
     * @return newShares is the number of new shares issued at the current exchange ratio.
     */
    function deposit(IERC20 token, uint256 amount) external returns (uint256);
    /**
     * @notice Used to withdraw tokens from this Strategy, to the `depositor`'s address
     * @param depositor is the address to receive the withdrawn funds
     * @param token is the ERC20 token being transferred out
     * @param amountShares is the amount of shares being withdrawn
     * @dev This function is only callable by the strategyManager contract. It is invoked inside of the strategyManager's
     * other functions, and individual share balances are recorded in the strategyManager as well.
     */
    function withdraw(address depositor, IERC20 token, uint256 amountShares) external;
    /**
     * @notice Used to convert a number of shares to the equivalent amount of underlying tokens for this strategy.
     * @notice In contrast to `sharesToUnderlyingView`, this function **may** make state modifications
     * @param amountShares is the amount of shares to calculate its conversion into the underlying token
     * @return The amount of underlying tokens corresponding to the input `amountShares`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function sharesToUnderlying(uint256 amountShares) external returns (uint256);
    /**
     * @notice Used to convert an amount of underlying tokens to the equivalent amount of shares in this strategy.
     * @notice In contrast to `underlyingToSharesView`, this function **may** make state modifications
     * @param amountUnderlying is the amount of `underlyingToken` to calculate its conversion into strategy shares
     * @return The amount of underlying tokens corresponding to the input `amountShares`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function underlyingToShares(uint256 amountUnderlying) external returns (uint256);
    /**
     * @notice convenience function for fetching the current underlying value of all of the `user`'s shares in
     * this strategy. In contrast to `userUnderlyingView`, this function **may** make state modifications
     */
    function userUnderlying(address user) external returns (uint256);
     /**
     * @notice Used to convert a number of shares to the equivalent amount of underlying tokens for this strategy.
     * @notice In contrast to `sharesToUnderlying`, this function guarantees no state modifications
     * @param amountShares is the amount of shares to calculate its conversion into the underlying token
     * @return The amount of shares corresponding to the input `amountUnderlying`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function sharesToUnderlyingView(uint256 amountShares) external view returns (uint256);
    /**
     * @notice Used to convert an amount of underlying tokens to the equivalent amount of shares in this strategy.
     * @notice In contrast to `underlyingToShares`, this function guarantees no state modifications
     * @param amountUnderlying is the amount of `underlyingToken` to calculate its conversion into strategy shares
     * @return The amount of shares corresponding to the input `amountUnderlying`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function underlyingToSharesView(uint256 amountUnderlying) external view returns (uint256);
    /**
     * @notice convenience function for fetching the current underlying value of all of the `user`'s shares in
     * this strategy. In contrast to `userUnderlying`, this function guarantees no state modifications
     */
    function userUnderlyingView(address user) external view returns (uint256);
    /// @notice The underlying token for shares in this Strategy
    function underlyingToken() external view returns (IERC20);
    /// @notice The total number of extant shares in this Strategy
    function totalShares() external view returns (uint256);
    /// @notice Returns either a brief string explaining the strategy's goal & purpose, or a link to metadata that explains in more detail.
    function explanation() external view returns (string memory);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Interface for the primary 'slashing' contract for EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice See the `Slasher` contract itself for implementation details.
 */
interface ISlasher {
    // struct used to store information about the current state of an operator's obligations to middlewares they are serving
    struct MiddlewareTimes {
        // The update block for the middleware whose most recent update was earliest, i.e. the 'stalest' update out of all middlewares the operator is serving
        uint32 stalestUpdateBlock;
        // The latest 'serveUntilBlock' from all of the middleware that the operator is serving
        uint32 latestServeUntilBlock;
    }
    // struct used to store details relevant to a single middleware that an operator has opted-in to serving
    struct MiddlewareDetails {
        // the block before which the contract is allowed to slash the user
        uint32 contractCanSlashOperatorUntilBlock;
        // the block at which the middleware's view of the operator's stake was most recently updated
        uint32 latestUpdateBlock;
    }
    /**
     * @notice Gives the `contractAddress` permission to slash the funds of the caller.
     * @dev Typically, this function must be called prior to registering for a middleware.
     */
    function optIntoSlashing(address contractAddress) external;
    /**
     * @notice Used for 'slashing' a certain operator.
     * @param toBeFrozen The operator to be frozen.
     * @dev Technically the operator is 'frozen' (hence the name of this function), and then subject to slashing pending a decision by a human-in-the-loop.
     * @dev The operator must have previously given the caller (which should be a contract) the ability to slash them, through a call to `optIntoSlashing`.
     */
    function freezeOperator(address toBeFrozen) external;
    
    /**
     * @notice Removes the 'frozen' status from each of the `frozenAddresses`
     * @dev Callable only by the contract owner (i.e. governance).
     */
    function resetFrozenStatus(address[] calldata frozenAddresses) external;
    /**
     * @notice this function is a called by middlewares during an operator's registration to make sure the operator's stake at registration 
     *         is slashable until serveUntil
     * @param operator the operator whose stake update is being recorded
     * @param serveUntilBlock the block until which the operator's stake at the current block is slashable
     * @dev adds the middleware's slashing contract to the operator's linked list
     */
    function recordFirstStakeUpdate(address operator, uint32 serveUntilBlock) external;
    /**
     * @notice this function is a called by middlewares during a stake update for an operator (perhaps to free pending withdrawals)
     *         to make sure the operator's stake at updateBlock is slashable until serveUntil
     * @param operator the operator whose stake update is being recorded
     * @param updateBlock the block for which the stake update is being recorded
     * @param serveUntilBlock the block until which the operator's stake at updateBlock is slashable
     * @param insertAfter the element of the operators linked list that the currently updating middleware should be inserted after
     * @dev insertAfter should be calculated offchain before making the transaction that calls this. this is subject to race conditions, 
     *      but it is anticipated to be rare and not detrimental.
     */
    function recordStakeUpdate(address operator, uint32 updateBlock, uint32 serveUntilBlock, uint256 insertAfter) external;
    /**
     * @notice this function is a called by middlewares during an operator's deregistration to make sure the operator's stake at deregistration 
     *         is slashable until serveUntil
     * @param operator the operator whose stake update is being recorded
     * @param serveUntilBlock the block until which the operator's stake at the current block is slashable
     * @dev removes the middleware's slashing contract to the operator's linked list and revokes the middleware's (i.e. caller's) ability to
     * slash `operator` once `serveUntil` is reached
     */
    function recordLastStakeUpdateAndRevokeSlashingAbility(address operator, uint32 serveUntilBlock) external;
    /**
     * @notice Used to determine whether `staker` is actively 'frozen'. If a staker is frozen, then they are potentially subject to
     * slashing of their funds, and cannot cannot deposit or withdraw from the strategyManager until the slashing process is completed
     * and the staker's status is reset (to 'unfrozen').
     * @param staker The staker of interest.
     * @return Returns 'true' if `staker` themselves has their status set to frozen, OR if the staker is delegated
     * to an operator who has their status set to frozen. Otherwise returns 'false'.
     */
    function isFrozen(address staker) external view returns (bool);
    /// @notice Returns true if `slashingContract` is currently allowed to slash `toBeSlashed`.
    function canSlash(address toBeSlashed, address slashingContract) external view returns (bool);
    /// @notice Returns the block until which `serviceContract` is allowed to slash the `operator`.
    function contractCanSlashOperatorUntilBlock(address operator, address serviceContract) external view returns (uint32);
    /// @notice Returns the block at which the `serviceContract` last updated its view of the `operator`'s stake
    function latestUpdateBlock(address operator, address serviceContract) external view returns (uint32);
    /// @notice A search routine for finding the correct input value of `insertAfter` to `recordStakeUpdate` / `_updateMiddlewareList`.
    function getCorrectValueForInsertAfter(address operator, uint32 updateBlock) external view returns (uint256);
    /**
     * @notice Returns 'true' if `operator` can currently complete a withdrawal started at the `withdrawalStartBlock`, with `middlewareTimesIndex` used
     * to specify the index of a `MiddlewareTimes` struct in the operator's list (i.e. an index in `operatorToMiddlewareTimes[operator]`). The specified
     * struct is consulted as proof of the `operator`'s ability (or lack thereof) to complete the withdrawal.
     * This function will return 'false' if the operator cannot currently complete a withdrawal started at the `withdrawalStartBlock`, *or* in the event
     * that an incorrect `middlewareTimesIndex` is supplied, even if one or more correct inputs exist.
     * @param operator Either the operator who queued the withdrawal themselves, or if the withdrawing party is a staker who delegated to an operator,
     * this address is the operator *who the staker was delegated to* at the time of the `withdrawalStartBlock`.
     * @param withdrawalStartBlock The block number at which the withdrawal was initiated.
     * @param middlewareTimesIndex Indicates an index in `operatorToMiddlewareTimes[operator]` to consult as proof of the `operator`'s ability to withdraw
     * @dev The correct `middlewareTimesIndex` input should be computable off-chain.
     */
    function canWithdraw(address operator, uint32 withdrawalStartBlock, uint256 middlewareTimesIndex) external returns(bool);
    /**
     * operator => 
     *  [
     *      (
     *          the least recent update block of all of the middlewares it's serving/served, 
     *          latest time that the stake bonded at that update needed to serve until
     *      )
     *  ]
     */
    function operatorToMiddlewareTimes(address operator, uint256 arrayIndex) external view returns (MiddlewareTimes memory);
    /// @notice Getter function for fetching `operatorToMiddlewareTimes[operator].length`
    function middlewareTimesLength(address operator) external view returns (uint256);
    /// @notice Getter function for fetching `operatorToMiddlewareTimes[operator][index].stalestUpdateBlock`.
    function getMiddlewareTimesIndexBlock(address operator, uint32 index) external view returns(uint32);
    /// @notice Getter function for fetching `operatorToMiddlewareTimes[operator][index].latestServeUntil`.
    function getMiddlewareTimesIndexServeUntilBlock(address operator, uint32 index) external view returns(uint32);
    /// @notice Getter function for fetching `_operatorToWhitelistedContractsByUpdate[operator].size`.
    function operatorWhitelistedContractsLinkedListSize(address operator) external view returns (uint256);
    /// @notice Getter function for fetching a single node in the operator's linked list (`_operatorToWhitelistedContractsByUpdate[operator]`).
    function operatorWhitelistedContractsLinkedListEntry(address operator, address node) external view returns (bool, uint256, uint256);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IStrategy.sol";
/**
 * @title Abstract interface for a contract that helps structure the delegation relationship.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice The gas budget provided to this contract in calls from EigenLayer contracts is limited.
 */
interface IDelegationTerms {
    function payForService(IERC20 token, uint256 amount) external payable;
    function onDelegationWithdrawn(
        address delegator,
        IStrategy[] memory stakerStrategyList,
        uint256[] memory stakerShares
    ) external returns(bytes memory);
    function onDelegationReceived(
        address delegator,
        IStrategy[] memory stakerStrategyList,
        uint256[] memory stakerShares
    ) external returns(bytes memory);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "../interfaces/IPauserRegistry.sol";
/**
 * @title Adds pausability to a contract, with pausing & unpausing controlled by the `pauser` and `unpauser` of a PauserRegistry contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice Contracts that inherit from this contract may define their own `pause` and `unpause` (and/or related) functions.
 * These functions should be permissioned as "onlyPauser" which defers to a `PauserRegistry` for determining access control.
 * @dev Pausability is implemented using a uint256, which allows up to 256 different single bit-flags; each bit can potentially pause different functionality.
 * Inspiration for this was taken from the NearBridge design here https://etherscan.io/address/0x3FEFc5A4B1c02f21cBc8D3613643ba0635b9a873#code.
 * For the `pause` and `unpause` functions we've implemented, if you pause, you can only flip (any number of) switches to on/1 (aka "paused"), and if you unpause,
 * you can only flip (any number of) switches to off/0 (aka "paused").
 * If you want a pauseXYZ function that just flips a single bit / "pausing flag", it will:
 * 1) 'bit-wise and' (aka `&`) a flag with the current paused state (as a uint256)
 * 2) update the paused state to this new value
 * @dev We note as well that we have chosen to identify flags by their *bit index* as opposed to their numerical value, so, e.g. defining `DEPOSITS_PAUSED = 3`
 * indicates specifically that if the *third bit* of `_paused` is flipped -- i.e. it is a '1' -- then deposits should be paused
 */
interface IPausable {
    /// @notice Address of the `PauserRegistry` contract that this contract defers to for determining access control (for pausing).
    function pauserRegistry() external view returns (IPauserRegistry); 
    /**
     * @notice This function is used to pause an EigenLayer contract's functionality.
     * It is permissioned to the `pauser` address, which is expected to be a low threshold multisig.
     * @param newPausedStatus represents the new value for `_paused` to take, which means it may flip several bits at once.
     * @dev This function can only pause functionality, and thus cannot 'unflip' any bit in `_paused` from 1 to 0.
     */
    function pause(uint256 newPausedStatus) external;
    /**
     * @notice Alias for `pause(type(uint256).max)`.
     */
    function pauseAll() external;
    /**
     * @notice This function is used to unpause an EigenLayer contract's functionality.
     * It is permissioned to the `unpauser` address, which is expected to be a high threshold multisig or governance contract.
     * @param newPausedStatus represents the new value for `_paused` to take, which means it may flip several bits at once.
     * @dev This function can only unpause functionality, and thus cannot 'flip' any bit in `_paused` from 0 to 1.
     */
    function unpause(uint256 newPausedStatus) external;
    /// @notice Returns the current paused status as a uint256.
    function paused() external view returns (uint256);
    /// @notice Returns 'true' if the `indexed`th bit of `_paused` is 1, and 'false' otherwise
    function paused(uint8 index) external view returns (bool);
    /// @notice Allows the unpauser to set a new pauser registry
    function setPauserRegistry(IPauserRegistry newPauserRegistry) external;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./Merkle.sol";
import "../libraries/Endian.sol";
//Utility library for parsing and PHASE0 beacon chain block headers
//SSZ Spec: https://github.com/ethereum/consensus-specs/blob/dev/ssz/simple-serialize.md#merkleization
//BeaconBlockHeader Spec: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#beaconblockheader
//BeaconState Spec: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#beaconstate
library BeaconChainProofs {
    // constants are the number of fields and the heights of the different merkle trees used in merkleizing beacon chain containers
    uint256 internal constant NUM_BEACON_BLOCK_HEADER_FIELDS = 5;
    uint256 internal constant BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT = 3;
    uint256 internal constant NUM_BEACON_BLOCK_BODY_FIELDS = 11;
    uint256 internal constant BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT = 4;
    uint256 internal constant NUM_BEACON_STATE_FIELDS = 21;
    uint256 internal constant BEACON_STATE_FIELD_TREE_HEIGHT = 5;
    uint256 internal constant NUM_ETH1_DATA_FIELDS = 3;
    uint256 internal constant ETH1_DATA_FIELD_TREE_HEIGHT = 2;
    uint256 internal constant NUM_VALIDATOR_FIELDS = 8;
    uint256 internal constant VALIDATOR_FIELD_TREE_HEIGHT = 3;
    uint256 internal constant NUM_EXECUTION_PAYLOAD_HEADER_FIELDS = 15;
    uint256 internal constant EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT = 4;
    uint256 internal constant NUM_EXECUTION_PAYLOAD_FIELDS = 15;
    uint256 internal constant EXECUTION_PAYLOAD_FIELD_TREE_HEIGHT = 4;
    // HISTORICAL_ROOTS_LIMIT\t = 2**24, so tree height is 24
    uint256 internal constant HISTORICAL_ROOTS_TREE_HEIGHT = 24;
    // HISTORICAL_BATCH is root of state_roots and block_root, so number of leaves =  2^1
    uint256 internal constant HISTORICAL_BATCH_TREE_HEIGHT = 1;
    // SLOTS_PER_HISTORICAL_ROOT = 2**13, so tree height is 13
    uint256 internal constant STATE_ROOTS_TREE_HEIGHT = 13;
    uint256 internal constant BLOCK_ROOTS_TREE_HEIGHT = 13;
    uint256 internal constant NUM_WITHDRAWAL_FIELDS = 4;
    // tree height for hash tree of an individual withdrawal container
    uint256 internal constant WITHDRAWAL_FIELD_TREE_HEIGHT = 2;
    uint256 internal constant VALIDATOR_TREE_HEIGHT = 40;
    //refer to the eigenlayer-cli proof library.  Despite being the same dimensions as the validator tree, the balance tree is merkleized differently
    uint256 internal constant BALANCE_TREE_HEIGHT = 38;
    // MAX_WITHDRAWALS_PER_PAYLOAD = 2**4, making tree height = 4
    uint256 internal constant WITHDRAWALS_TREE_HEIGHT = 4;
    //in beacon block body
    uint256 internal constant EXECUTION_PAYLOAD_INDEX = 9;
    // in beacon block header
    uint256 internal constant STATE_ROOT_INDEX = 3;
    uint256 internal constant PROPOSER_INDEX_INDEX = 1;
    uint256 internal constant SLOT_INDEX = 0;
    uint256 internal constant BODY_ROOT_INDEX = 4;
    // in beacon state
    uint256 internal constant STATE_ROOTS_INDEX = 6;
    uint256 internal constant BLOCK_ROOTS_INDEX = 5;
    uint256 internal constant HISTORICAL_ROOTS_INDEX = 7;
    uint256 internal constant ETH_1_ROOT_INDEX = 8;
    uint256 internal constant VALIDATOR_TREE_ROOT_INDEX = 11;
    uint256 internal constant BALANCE_INDEX = 12;
    uint256 internal constant EXECUTION_PAYLOAD_HEADER_INDEX = 24;
    uint256 internal constant HISTORICAL_BATCH_STATE_ROOT_INDEX = 1;
    // in validator
    uint256 internal constant VALIDATOR_WITHDRAWAL_CREDENTIALS_INDEX = 1;
    uint256 internal constant VALIDATOR_BALANCE_INDEX = 2;
    uint256 internal constant VALIDATOR_SLASHED_INDEX = 3;
    uint256 internal constant VALIDATOR_WITHDRAWABLE_EPOCH_INDEX = 7;
    
    // in execution payload header
    uint256 internal constant BLOCK_NUMBER_INDEX = 6;
    uint256 internal constant WITHDRAWALS_ROOT_INDEX = 14;
    //in execution payload
    uint256 internal constant WITHDRAWALS_INDEX = 14;
    // in withdrawal
    uint256 internal constant WITHDRAWAL_VALIDATOR_INDEX_INDEX = 1;
    uint256 internal constant WITHDRAWAL_VALIDATOR_AMOUNT_INDEX = 3;
    //In historicalBatch
    uint256 internal constant HISTORICALBATCH_STATEROOTS_INDEX = 1;
    //Misc Constants
    uint256 internal constant SLOTS_PER_EPOCH = 32;
    bytes8 internal constant UINT64_MASK = 0xffffffffffffffff;
    struct WithdrawalProofs {
        bytes blockHeaderProof;
        bytes withdrawalProof;
        bytes slotProof;
        bytes executionPayloadProof;
        bytes blockNumberProof;
        uint64 blockHeaderRootIndex;
        uint64 withdrawalIndex;
        bytes32 blockHeaderRoot;
        bytes32 blockBodyRoot;
        bytes32 slotRoot;
        bytes32 blockNumberRoot;
        bytes32 executionPayloadRoot;
    }
    struct ValidatorFieldsAndBalanceProofs {
        bytes validatorFieldsProof;
        bytes validatorBalanceProof;
        bytes32 balanceRoot;
    }
    struct ValidatorFieldsProof {
        bytes validatorProof;
        uint40 validatorIndex;
    }
    /**
     * 
     * @notice This function is parses the balanceRoot to get the uint64 balance of a validator.  During merkleization of the
     * beacon state balance tree, four uint64 values (making 32 bytes) are grouped together and treated as a single leaf in the merkle tree. Thus the
     * validatorIndex mod 4 is used to determine which of the four uint64 values to extract from the balanceRoot.
     * @param validatorIndex is the index of the validator being proven for.
     * @param balanceRoot is the combination of 4 validator balances being proven for.
     * @return The validator's balance, in Gwei
     */
   function getBalanceFromBalanceRoot(uint40 validatorIndex, bytes32 balanceRoot) internal pure returns (uint64) {
        uint256 bitShiftAmount = (validatorIndex % 4) * 64;
        bytes32 validatorBalanceLittleEndian = bytes32((uint256(balanceRoot) << bitShiftAmount));
        uint64 validatorBalance = Endian.fromLittleEndianUint64(validatorBalanceLittleEndian);
        return validatorBalance;
    }
    /**
     * @notice This function verifies merkle proofs of the fields of a certain validator against a beacon chain state root
     * @param validatorIndex the index of the proven validator
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param proof is the data used in proving the validator's fields
     * @param validatorFields the claimed fields of the validator
     */
    function verifyValidatorFields(
        uint40 validatorIndex,
        bytes32 beaconStateRoot,
        bytes calldata proof, 
        bytes32[] calldata validatorFields
    ) internal view {
        
        require(validatorFields.length == 2**VALIDATOR_FIELD_TREE_HEIGHT, "BeaconChainProofs.verifyValidatorFields: Validator fields has incorrect length");
        /**
         * Note: the length of the validator merkle proof is BeaconChainProofs.VALIDATOR_TREE_HEIGHT + 1.
         * There is an additional layer added by hashing the root with the length of the validator list
         */
        require(proof.length == 32 * ((VALIDATOR_TREE_HEIGHT + 1) + BEACON_STATE_FIELD_TREE_HEIGHT), "BeaconChainProofs.verifyValidatorFields: Proof has incorrect length");
        uint256 index = (VALIDATOR_TREE_ROOT_INDEX << (VALIDATOR_TREE_HEIGHT + 1)) | uint256(validatorIndex);
        // merkleize the validatorFields to get the leaf to prove
        bytes32 validatorRoot = Merkle.merkleizeSha256(validatorFields);
        // verify the proof of the validatorRoot against the beaconStateRoot
        require(Merkle.verifyInclusionSha256(proof, beaconStateRoot, validatorRoot, index), "BeaconChainProofs.verifyValidatorFields: Invalid merkle proof");
    }
    /**
     * @notice This function verifies merkle proofs of the balance of a certain validator against a beacon chain state root
     * @param validatorIndex the index of the proven validator
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param proof is the proof of the balance against the beacon chain state root
     * @param balanceRoot is the serialized balance used to prove the balance of the validator (refer to `getBalanceFromBalanceRoot` above for detailed explanation)
     */
    function verifyValidatorBalance(
        uint40 validatorIndex,
        bytes32 beaconStateRoot,
        bytes calldata proof,
        bytes32 balanceRoot
    ) internal view {
        require(proof.length == 32 * ((BALANCE_TREE_HEIGHT + 1) + BEACON_STATE_FIELD_TREE_HEIGHT), "BeaconChainProofs.verifyValidatorBalance: Proof has incorrect length");
        /**
        * the beacon state's balance list is a list of uint64 values, and these are grouped together in 4s when merkleized.  
        * Therefore, the index of the balance of a validator is validatorIndex/4
        */
        uint256 balanceIndex = uint256(validatorIndex/4);
        balanceIndex = (BALANCE_INDEX << (BALANCE_TREE_HEIGHT + 1)) | balanceIndex;
        require(Merkle.verifyInclusionSha256(proof, beaconStateRoot, balanceRoot, balanceIndex), "BeaconChainProofs.verifyValidatorBalance: Invalid merkle proof");
    }
    /**
     * @notice This function verifies the slot and the withdrawal fields for a given withdrawal
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param proofs is the provided set of merkle proofs
     * @param withdrawalFields is the serialized withdrawal container to be proven
     */
    function verifyWithdrawalProofs(
        bytes32 beaconStateRoot,
        WithdrawalProofs calldata proofs,
        bytes32[] calldata withdrawalFields
    ) internal view {
        require(withdrawalFields.length == 2**WITHDRAWAL_FIELD_TREE_HEIGHT, "BeaconChainProofs.verifyWithdrawalProofs: withdrawalFields has incorrect length");
        require(proofs.blockHeaderRootIndex < 2**BLOCK_ROOTS_TREE_HEIGHT, "BeaconChainProofs.verifyWithdrawalProofs: blockRootIndex is too large");
        require(proofs.withdrawalIndex < 2**WITHDRAWALS_TREE_HEIGHT, "BeaconChainProofs.verifyWithdrawalProofs: withdrawalIndex is too large");
       
        // verify the block header proof length
        require(proofs.blockHeaderProof.length == 32 * (BEACON_STATE_FIELD_TREE_HEIGHT + BLOCK_ROOTS_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: blockHeaderProof has incorrect length");
        require(proofs.withdrawalProof.length == 32 * (EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT + WITHDRAWALS_TREE_HEIGHT + 1),
            "BeaconChainProofs.verifyWithdrawalProofs: withdrawalProof has incorrect length");
        require(proofs.executionPayloadProof.length == 32 * (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT + BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: executionPayloadProof has incorrect length");
        require(proofs.slotProof.length == 32 * (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: slotProof has incorrect length");
        require(proofs.blockNumberProof.length == 32 * (EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: blockNumberProof has incorrect length");
        /**
         * Computes the block_header_index relative to the beaconStateRoot.  It concatenates the indexes of all the
         * intermediate root indexes from the bottom of the sub trees (the block header container) to the top of the tree
         */
        uint256 blockHeaderIndex = BLOCK_ROOTS_INDEX << (BLOCK_ROOTS_TREE_HEIGHT)  | uint256(proofs.blockHeaderRootIndex);
        // Verify the blockHeaderRoot against the beaconStateRoot
        require(Merkle.verifyInclusionSha256(proofs.blockHeaderProof, beaconStateRoot, proofs.blockHeaderRoot, blockHeaderIndex),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid block header merkle proof");
        //Next we verify the slot against the blockHeaderRoot
        require(Merkle.verifyInclusionSha256(proofs.slotProof, proofs.blockHeaderRoot, proofs.slotRoot, SLOT_INDEX), "BeaconChainProofs.verifyWithdrawalProofs: Invalid slot merkle proof");
        // Next we verify the executionPayloadRoot against the blockHeaderRoot
        uint256 executionPayloadIndex = BODY_ROOT_INDEX << (BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT)| EXECUTION_PAYLOAD_INDEX ;
        require(Merkle.verifyInclusionSha256(proofs.executionPayloadProof, proofs.blockHeaderRoot, proofs.executionPayloadRoot, executionPayloadIndex),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid executionPayload merkle proof");
        // Next we verify the blockNumberRoot against the executionPayload root
        require(Merkle.verifyInclusionSha256(proofs.blockNumberProof, proofs.executionPayloadRoot, proofs.blockNumberRoot, BLOCK_NUMBER_INDEX),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid blockNumber merkle proof");
        /**
         * Next we verify the withdrawal fields against the blockHeaderRoot:
         * First we compute the withdrawal_index relative to the blockHeaderRoot by concatenating the indexes of all the 
         * intermediate root indexes from the bottom of the sub trees (the withdrawal container) to the top, the blockHeaderRoot.
         * Then we calculate merkleize the withdrawalFields container to calculate the the withdrawalRoot.
         * Finally we verify the withdrawalRoot against the executionPayloadRoot.
         */
        uint256 withdrawalIndex = WITHDRAWALS_INDEX << (WITHDRAWALS_TREE_HEIGHT + 1) | uint256(proofs.withdrawalIndex);
        bytes32 withdrawalRoot = Merkle.merkleizeSha256(withdrawalFields);
        require(Merkle.verifyInclusionSha256(proofs.withdrawalProof, proofs.executionPayloadRoot, withdrawalRoot, withdrawalIndex),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid withdrawal merkle proof");
    }
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
 * @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 v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
 * @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:
 * ```
 * 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(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }
    struct BooleanSlot {
        bool value;
    }
    struct Bytes32Slot {
        bytes32 value;
    }
    struct Uint256Slot {
        uint256 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
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);
    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);
    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);
    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);
    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);
    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);
    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Interface for the `PauserRegistry` contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface IPauserRegistry {
    /// @notice Mapping of addresses to whether they hold the pauser role.
    function isPauser(address pauser) external view returns (bool);
    /// @notice Unique address that holds the unpauser role. Capable of changing *both* the pauser and unpauser addresses.
    function unpauser() external view returns (address);
}
// SPDX-License-Identifier: BUSL-1.1
// Adapted from OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/MerkleProof.sol)
pragma solidity =0.8.12;
/**
 * @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 Merkle {
    /**
     * @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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     * 
     * Note this is for a Merkle tree using the keccak/sha3 hash function
     */
    function verifyInclusionKeccak(
        bytes memory proof,
        bytes32 root,
        bytes32 leaf,
        uint256 index
    ) internal pure returns (bool) {
        return processInclusionProofKeccak(proof, leaf, index) == 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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     * 
     * _Available since v4.4._
     * 
     * Note this is for a Merkle tree using the keccak/sha3 hash function
     */
    function processInclusionProofKeccak(bytes memory proof, bytes32 leaf, uint256 index) internal pure returns (bytes32) {
        require(proof.length != 0 && proof.length % 32 == 0, "Merkle.processInclusionProofKeccak: proof length should be a non-zero multiple of 32");
        bytes32 computedHash = leaf;
        for (uint256 i = 32; i <= proof.length; i+=32) {
            if(index % 2 == 0) {
                // if ith bit of index is 0, then computedHash is a left sibling
                assembly {
                    mstore(0x00, computedHash)
                    mstore(0x20, mload(add(proof, i)))
                    computedHash := keccak256(0x00, 0x40)
                    index := div(index, 2)
                }
            } else {
                // if ith bit of index is 1, then computedHash is a right sibling
                assembly {
                    mstore(0x00, mload(add(proof, i)))
                    mstore(0x20, computedHash)
                    computedHash := keccak256(0x00, 0x40)
                    index := div(index, 2)
                }            
            }
        }
        return computedHash;
    }
    /**
     * @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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     * 
     * Note this is for a Merkle tree using the sha256 hash function
     */
    function verifyInclusionSha256(
        bytes memory proof,
        bytes32 root,
        bytes32 leaf,
        uint256 index
    ) internal view returns (bool) {
        return processInclusionProofSha256(proof, leaf, index) == 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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     *
     * _Available since v4.4._
     * 
     * Note this is for a Merkle tree using the sha256 hash function
     */
    function processInclusionProofSha256(bytes memory proof, bytes32 leaf, uint256 index) internal view returns (bytes32) {
        require(proof.length != 0 && proof.length % 32 == 0, "Merkle.processInclusionProofSha256: proof length should be a non-zero multiple of 32");
        bytes32[1] memory computedHash = [leaf];
        for (uint256 i = 32; i <= proof.length; i+=32) {
            if(index % 2 == 0) {
                // if ith bit of index is 0, then computedHash is a left sibling
                assembly {
                    mstore(0x00, mload(computedHash))
                    mstore(0x20, mload(add(proof, i)))
                    if iszero(staticcall(sub(gas(), 2000), 2, 0x00, 0x40, computedHash, 0x20)) {revert(0, 0)}
                    index := div(index, 2)
                }
            } else {
                // if ith bit of index is 1, then computedHash is a right sibling
                assembly {
                    mstore(0x00, mload(add(proof, i)))
                    mstore(0x20, mload(computedHash))
                    if iszero(staticcall(sub(gas(), 2000), 2, 0x00, 0x40, computedHash, 0x20)) {revert(0, 0)}
                    index := div(index, 2)
                }            
            }
        }
        return computedHash[0];
    }
    /**
     @notice this function returns the merkle root of a tree created from a set of leaves using sha256 as its hash function
     @param leaves the leaves of the merkle tree
     @return The computed Merkle root of the tree.
     @dev A pre-condition to this function is that leaves.length is a power of two.  If not, the function will merkleize the inputs incorrectly.
     */ 
    function merkleizeSha256(
        bytes32[] memory leaves
    ) internal pure returns (bytes32) {
        //there are half as many nodes in the layer above the leaves
        uint256 numNodesInLayer = leaves.length / 2;
        //create a layer to store the internal nodes
        bytes32[] memory layer = new bytes32[](numNodesInLayer);
        //fill the layer with the pairwise hashes of the leaves
        for (uint i = 0; i < numNodesInLayer; i++) {
            layer[i] = sha256(abi.encodePacked(leaves[2*i], leaves[2*i+1]));
        }
        //the next layer above has half as many nodes
        numNodesInLayer /= 2;
        //while we haven't computed the root
        while (numNodesInLayer != 0) {
            //overwrite the first numNodesInLayer nodes in layer with the pairwise hashes of their children
            for (uint i = 0; i < numNodesInLayer; i++) {
                layer[i] = sha256(abi.encodePacked(layer[2*i], layer[2*i+1]));
            }
            //the next layer above has half as many nodes
            numNodesInLayer /= 2;
        }
        //the first node in the layer is the root
        return layer[0];
    }
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
library Endian {
    /**
     * @notice Converts a little endian-formatted uint64 to a big endian-formatted uint64
     * @param lenum little endian-formatted uint64 input, provided as 'bytes32' type
     * @return n The big endian-formatted uint64
     * @dev Note that the input is formatted as a 'bytes32' type (i.e. 256 bits), but it is immediately truncated to a uint64 (i.e. 64 bits)
     * through a right-shift/shr operation.
     */
    function fromLittleEndianUint64(
        bytes32 lenum
    ) internal pure returns (uint64 n) {
        // the number needs to be stored in little-endian encoding (ie in bytes 0-8)
        n = uint64(uint256(lenum >> 192));
        return
            (n >> 56) |
            ((0x00FF000000000000 & n) >> 40) |
            ((0x0000FF0000000000 & n) >> 24) |
            ((0x000000FF00000000 & n) >> 8) |
            ((0x00000000FF000000 & n) << 8) |
            ((0x0000000000FF0000 & n) << 24) |
            ((0x000000000000FF00 & n) << 40) |
            ((0x00000000000000FF & n) << 56);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/UpgradeableBeacon.sol)
pragma solidity ^0.8.0;
import "./IBeacon.sol";
import "../../access/Ownable.sol";
import "../../utils/Address.sol";
/**
 * @dev This contract is used in conjunction with one or more instances of {BeaconProxy} to determine their
 * implementation contract, which is where they will delegate all function calls.
 *
 * An owner is able to change the implementation the beacon points to, thus upgrading the proxies that use this beacon.
 */
contract UpgradeableBeacon is IBeacon, Ownable {
    address private _implementation;
    /**
     * @dev Emitted when the implementation returned by the beacon is changed.
     */
    event Upgraded(address indexed implementation);
    /**
     * @dev Sets the address of the initial implementation, and the deployer account as the owner who can upgrade the
     * beacon.
     */
    constructor(address implementation_) {
        _setImplementation(implementation_);
    }
    /**
     * @dev Returns the current implementation address.
     */
    function implementation() public view virtual override returns (address) {
        return _implementation;
    }
    /**
     * @dev Upgrades the beacon to a new implementation.
     *
     * Emits an {Upgraded} event.
     *
     * Requirements:
     *
     * - msg.sender must be the owner of the contract.
     * - `newImplementation` must be a contract.
     */
    function upgradeTo(address newImplementation) public virtual onlyOwner {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }
    /**
     * @dev Sets the implementation contract address for this beacon
     *
     * Requirements:
     *
     * - `newImplementation` must be a contract.
     */
    function _setImplementation(address newImplementation) private {
        require(Address.isContract(newImplementation), "UpgradeableBeacon: implementation is not a contract");
        _implementation = newImplementation;
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
 * @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.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "@openzeppelin-upgrades/contracts/proxy/utils/Initializable.sol";
import "@openzeppelin-upgrades/contracts/access/OwnableUpgradeable.sol";
import "@openzeppelin-upgrades/contracts/security/ReentrancyGuardUpgradeable.sol";
import "@openzeppelin-upgrades/contracts/utils/AddressUpgradeable.sol";
import "../libraries/BeaconChainProofs.sol";
import "../libraries/BytesLib.sol";
import "../libraries/Endian.sol";
import "../interfaces/IETHPOSDeposit.sol";
import "../interfaces/IEigenPodManager.sol";
import "../interfaces/IEigenPod.sol";
import "../interfaces/IDelayedWithdrawalRouter.sol";
import "../interfaces/IPausable.sol";
import "./EigenPodPausingConstants.sol";
/**
 * @title The implementation contract used for restaking beacon chain ETH on EigenLayer 
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice The main functionalities are:
 * - creating new ETH validators with their withdrawal credentials pointed to this contract
 * - proving from beacon chain state roots that withdrawal credentials are pointed to this contract
 * - proving from beacon chain state roots the balances of ETH validators with their withdrawal credentials
 *   pointed to this contract
 * - updating aggregate balances in the EigenPodManager
 * - withdrawing eth when withdrawals are initiated
 * @dev Note that all beacon chain balances are stored as gwei within the beacon chain datastructures. We choose
 *   to account balances in terms of gwei in the EigenPod contract and convert to wei when making calls to other contracts
 */
contract EigenPod is IEigenPod, Initializable, ReentrancyGuardUpgradeable, EigenPodPausingConstants {
    using BytesLib for bytes;
    // CONSTANTS + IMMUTABLES
    uint256 internal constant GWEI_TO_WEI = 1e9;
    /// @notice Maximum "staleness" of a Beacon Chain state root against which `verifyOvercommittedStake` may be proven. 7 days in blocks.
    uint256 internal constant VERIFY_OVERCOMMITTED_WINDOW_BLOCKS = 50400;
    /// @notice This is the beacon chain deposit contract
    IETHPOSDeposit public immutable ethPOS;
    /// @notice Contract used for withdrawal routing, to provide an extra "safety net" mechanism
    IDelayedWithdrawalRouter public immutable delayedWithdrawalRouter;
    /// @notice The single EigenPodManager for EigenLayer
    IEigenPodManager public immutable eigenPodManager;
    /// @notice The amount of eth, in gwei, that is restaked per validator
    uint64 public immutable REQUIRED_BALANCE_GWEI;
    /// @notice The amount of eth, in wei, that is restaked per ETH validator into EigenLayer
    uint256 public immutable REQUIRED_BALANCE_WEI;
    /// @notice The owner of this EigenPod
    address public podOwner;
    /**
     * @notice The latest block number at which the pod owner withdrew the balance of the pod.
     * @dev This variable is only updated when the `withdraw` function is called, which can only occur before `hasRestaked` is set to true for this pod.
     * Proofs for this pod are only valid against Beacon Chain state roots corresponding to blocks after the stored `mostRecentWithdrawalBlockNumber`.
     */
    uint64 public mostRecentWithdrawalBlockNumber;
    // STORAGE VARIABLES
    /// @notice the amount of execution layer ETH in this contract that is staked in EigenLayer (i.e. withdrawn from the Beacon Chain but not from EigenLayer), 
    uint64 public restakedExecutionLayerGwei;
    /// @notice an indicator of whether or not the podOwner has ever "fully restaked" by successfully calling `verifyCorrectWithdrawalCredentials`.
    bool public hasRestaked;
    /// @notice this is a mapping of validator indices to a Validator struct containing pertinent info about the validator
    mapping(uint40 => VALIDATOR_STATUS) public validatorStatus;
    /// @notice This is a mapping of validatorIndex to withdrawalIndex to whether or not they have proven a withdrawal for that index
    mapping(uint40 => mapping(uint64 => bool)) public provenPartialWithdrawal;
    /// @notice Emitted when an ETH validator stakes via this eigenPod
    event EigenPodStaked(bytes pubkey);
    /// @notice Emitted when an ETH validator's withdrawal credentials are successfully verified to be pointed to this eigenPod
    event ValidatorRestaked(uint40 validatorIndex);
    /// @notice Emitted when an ETH validator is proven to have a balance less than `REQUIRED_BALANCE_GWEI` in the beacon chain
    event ValidatorOvercommitted(uint40 validatorIndex);
    
    /// @notice Emitted when an ETH validator is prove to have withdrawn from the beacon chain
    event FullWithdrawalRedeemed(uint40 validatorIndex, address indexed recipient, uint64 withdrawalAmountGwei);
    /// @notice Emitted when a partial withdrawal claim is successfully redeemed
    event PartialWithdrawalRedeemed(uint40 validatorIndex, address indexed recipient, uint64 partialWithdrawalAmountGwei);
    /// @notice Emitted when restaked beacon chain ETH is withdrawn from the eigenPod.
    event RestakedBeaconChainETHWithdrawn(address indexed recipient, uint256 amount);
    modifier onlyEigenPodManager {
        require(msg.sender == address(eigenPodManager), "EigenPod.onlyEigenPodManager: not eigenPodManager");
        _;
    }
    modifier onlyEigenPodOwner {
        require(msg.sender == podOwner, "EigenPod.onlyEigenPodOwner: not podOwner");
        _;
    }
    modifier onlyNotFrozen {
        require(!eigenPodManager.slasher().isFrozen(podOwner), "EigenPod.onlyNotFrozen: pod owner is frozen");
        _;
    }
    modifier hasNeverRestaked {
        require(!hasRestaked, "EigenPod.hasNeverRestaked: restaking is enabled");
        _;
    }
    /// @notice Checks that `blockNumber` is strictly greater than the value stored in `mostRecentWithdrawalBlockNumber`
    modifier proofIsForValidBlockNumber(uint64 blockNumber) {
        require(blockNumber > mostRecentWithdrawalBlockNumber,
            "EigenPod.proofIsForValidBlockNumber: beacon chain proof must be for block number after mostRecentWithdrawalBlockNumber");
        _;
    }
    /**
     * @notice Based on 'Pausable' code, but uses the storage of the EigenPodManager instead of this contract. This construction
     * is necessary for enabling pausing all EigenPods at the same time (due to EigenPods being Beacon Proxies).
     * Modifier throws if the `indexed`th bit of `_paused` in the EigenPodManager is 1, i.e. if the `index`th pause switch is flipped.
     */
    modifier onlyWhenNotPaused(uint8 index) {
        require(!IPausable(address(eigenPodManager)).paused(index), "EigenPod.onlyWhenNotPaused: index is paused in EigenPodManager");
        _;
    }
    constructor(
        IETHPOSDeposit _ethPOS,
        IDelayedWithdrawalRouter _delayedWithdrawalRouter,
        IEigenPodManager _eigenPodManager,
        uint256 _REQUIRED_BALANCE_WEI
    ) {
        ethPOS = _ethPOS;
        delayedWithdrawalRouter = _delayedWithdrawalRouter;
        eigenPodManager = _eigenPodManager;
        REQUIRED_BALANCE_WEI = _REQUIRED_BALANCE_WEI;
        REQUIRED_BALANCE_GWEI = uint64(_REQUIRED_BALANCE_WEI / GWEI_TO_WEI);
        require(_REQUIRED_BALANCE_WEI % GWEI_TO_WEI == 0, "EigenPod.contructor: _REQUIRED_BALANCE_WEI is not a whole number of gwei");
        _disableInitializers();
    }
    /// @notice Used to initialize the pointers to addresses crucial to the pod's functionality. Called on construction by the EigenPodManager.
    function initialize(address _podOwner) external initializer {
        require(_podOwner != address(0), "EigenPod.initialize: podOwner cannot be zero address");
        podOwner = _podOwner;
    }
    /// @notice Called by EigenPodManager when the owner wants to create another ETH validator.
    function stake(bytes calldata pubkey, bytes calldata signature, bytes32 depositDataRoot) external payable onlyEigenPodManager {
        // stake on ethpos
        require(msg.value == 32 ether, "EigenPod.stake: must initially stake for any validator with 32 ether");
        ethPOS.deposit{value : 32 ether}(pubkey, _podWithdrawalCredentials(), signature, depositDataRoot);
        emit EigenPodStaked(pubkey);
    }
    /**
     * @notice  This function verifies that the withdrawal credentials of the podOwner are pointed to
     * this contract. It also verifies the current (not effective) balance  of the validator.  It verifies the provided proof of the ETH validator against the beacon chain state
     * root, marks the validator as 'active' in EigenLayer, and credits the restaked ETH in Eigenlayer.
     * @param oracleBlockNumber is the Beacon Chain blockNumber whose state root the `proof` will be proven against.
     * @param validatorIndex is the index of the validator being proven, refer to consensus specs 
     * @param proofs is the bytes that prove the ETH validator's balance and withdrawal credentials against a beacon chain state root
     * @param validatorFields are the fields of the "Validator Container", refer to consensus specs 
     * for details: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
     */
    function verifyWithdrawalCredentialsAndBalance(
        uint64 oracleBlockNumber,
        uint40 validatorIndex,
        BeaconChainProofs.ValidatorFieldsAndBalanceProofs calldata proofs,
        bytes32[] calldata validatorFields
    )
        external
        onlyWhenNotPaused(PAUSED_EIGENPODS_VERIFY_CREDENTIALS)
        // check that the provided `oracleBlockNumber` is after the `mostRecentWithdrawalBlockNumber`
        proofIsForValidBlockNumber(oracleBlockNumber)
    {
        require(validatorStatus[validatorIndex] == VALIDATOR_STATUS.INACTIVE,
            "EigenPod.verifyCorrectWithdrawalCredentials: Validator must be inactive to prove withdrawal credentials");
        require(validatorFields[BeaconChainProofs.VALIDATOR_WITHDRAWAL_CREDENTIALS_INDEX] == bytes32(_podWithdrawalCredentials()),
            "EigenPod.verifyCorrectWithdrawalCredentials: Proof is not for this EigenPod");
        // deserialize the balance field from the balanceRoot
        uint64 validatorCurrentBalanceGwei = BeaconChainProofs.getBalanceFromBalanceRoot(validatorIndex, proofs.balanceRoot);
        
        // make sure the balance is greater than the amount restaked per validator
        require(validatorCurrentBalanceGwei >= REQUIRED_BALANCE_GWEI,
            "EigenPod.verifyCorrectWithdrawalCredentials: ETH validator's balance must be greater than or equal to the restaked balance per validator");
        // verify ETH validator proof
        bytes32 beaconStateRoot = eigenPodManager.getBeaconChainStateRoot(oracleBlockNumber);
        BeaconChainProofs.verifyValidatorFields(
            validatorIndex,
            beaconStateRoot,
            proofs.validatorFieldsProof,
            validatorFields
        );
        // verify ETH validator's current balance, which is stored in the `balances` container of the beacon state
        BeaconChainProofs.verifyValidatorBalance(
            validatorIndex,
            beaconStateRoot,
            proofs.validatorBalanceProof,
            proofs.balanceRoot
        );
        // set the status to active
        validatorStatus[validatorIndex] = VALIDATOR_STATUS.ACTIVE;
        // Sets "hasRestaked" to true if it hasn't been set yet. 
        if (!hasRestaked) {
            hasRestaked = true;
        }
        emit ValidatorRestaked(validatorIndex);
        // virtually deposit REQUIRED_BALANCE_WEI for new ETH validator
        eigenPodManager.restakeBeaconChainETH(podOwner, REQUIRED_BALANCE_WEI);
    }
    /**
     * @notice This function records an overcommitment of stake to EigenLayer on behalf of a certain ETH validator.
     *         If successful, the overcommitted balance is penalized (available for withdrawal whenever the pod's balance allows).
     *         The ETH validator's shares in the enshrined beaconChainETH strategy are also removed from the StrategyManager and undelegated.
     * @param oracleBlockNumber The oracleBlockNumber whose state root the `proof` will be proven against.
     *        Must be within `VERIFY_OVERCOMMITTED_WINDOW_BLOCKS` of the current block.
     * @param validatorIndex is the index of the validator being proven, refer to consensus specs 
     * @param proofs is the proof of the validator's balance and validatorFields in the balance tree and the balanceRoot to prove for
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *                                    the StrategyManager in case it must be removed from the list of the podOwner's strategies
     * @param validatorFields are the fields of the "Validator Container", refer to consensus specs
     * @dev For more details on the Beacon Chain spec, see: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
     */
    function verifyOvercommittedStake(
        uint40 validatorIndex,
        BeaconChainProofs.ValidatorFieldsAndBalanceProofs calldata proofs,
        bytes32[] calldata validatorFields,
        uint256 beaconChainETHStrategyIndex,
        uint64 oracleBlockNumber
    ) external onlyWhenNotPaused(PAUSED_EIGENPODS_VERIFY_OVERCOMMITTED) {
       // ensure that the blockNumber being proven against is not "too stale", i.e. that the validator was *recently* overcommitted.
        require(oracleBlockNumber + VERIFY_OVERCOMMITTED_WINDOW_BLOCKS >= block.number,
            "EigenPod.verifyOvercommittedStake: specified blockNumber is too far in past");
        require(validatorStatus[validatorIndex] == VALIDATOR_STATUS.ACTIVE, "EigenPod.verifyOvercommittedStake: Validator not active");
        // deserialize the balance field from the balanceRoot
        uint64 validatorCurrentBalanceGwei = BeaconChainProofs.getBalanceFromBalanceRoot(validatorIndex, proofs.balanceRoot);        
        require(validatorCurrentBalanceGwei < REQUIRED_BALANCE_GWEI,
            "EigenPod.verifyOvercommittedStake: validator's balance must be less than the restaked balance per validator");
        
        // verify ETH validator proof
        bytes32 beaconStateRoot = eigenPodManager.getBeaconChainStateRoot(oracleBlockNumber);
 
        /**
         * If validator's balance is zero, then either they have fully withdrawn or they have been slashed down zero.
         * If the validator *has* been slashed, then this function can proceed. If they have *not* been slashed, then
         * the `verifyAndProcessWithdrawal` function should be called instead.
         */
        if (validatorCurrentBalanceGwei == 0) {
            uint64 slashedStatus = Endian.fromLittleEndianUint64(validatorFields[BeaconChainProofs.VALIDATOR_SLASHED_INDEX]);
            require(slashedStatus == 1, "EigenPod.verifyOvercommittedStake: Validator must be slashed to be overcommitted");
            //Verify the validator fields, which contain the validator's slashed status
            BeaconChainProofs.verifyValidatorFields(
                validatorIndex,
                beaconStateRoot,
                proofs.validatorFieldsProof,
                validatorFields
            );
        }
        // verify ETH validator's current balance, which is stored in the `balances` container of the beacon state
       BeaconChainProofs.verifyValidatorBalance(
            validatorIndex,
            beaconStateRoot,
            proofs.validatorBalanceProof,
            proofs.balanceRoot
        );
        // mark the ETH validator as overcommitted
        validatorStatus[validatorIndex] = VALIDATOR_STATUS.OVERCOMMITTED;
        emit ValidatorOvercommitted(validatorIndex);
        // remove and undelegate shares in EigenLayer
        eigenPodManager.recordOvercommittedBeaconChainETH(podOwner, beaconChainETHStrategyIndex, REQUIRED_BALANCE_WEI);
    }
    /**
     * @notice This function records a full withdrawal on behalf of one of the Ethereum validators for this EigenPod
     * @param withdrawalProofs is the information needed to check the veracity of the block number and withdrawal being proven
     * @param validatorFieldsProof is the information needed to check the veracity of the validator fields being proven
     * @param withdrawalFields are the fields of the withdrawal being proven
     * @param validatorFields are the fields of the validator being proven
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *        the EigenPodManager to the StrategyManager in case it must be removed from the podOwner's list of strategies
     * @param oracleBlockNumber is the Beacon Chain blockNumber whose state root the `proof` will be proven against.
     */
    function verifyAndProcessWithdrawal(
        BeaconChainProofs.WithdrawalProofs calldata withdrawalProofs, 
        bytes calldata validatorFieldsProof,
        bytes32[] calldata validatorFields,
        bytes32[] calldata withdrawalFields,
        uint256 beaconChainETHStrategyIndex,
        uint64 oracleBlockNumber
    )
        external
        onlyWhenNotPaused(PAUSED_EIGENPODS_VERIFY_WITHDRAWAL)
        onlyNotFrozen
        /** 
         * Check that the provided block number being proven against is after the `mostRecentWithdrawalBlockNumber`.
         * Without this check, there is an edge case where a user proves a past withdrawal for a validator whose funds they already withdrew,
         * as a way to "withdraw the same funds twice" without providing adequate proof.
         * Note that this check is not made using the oracleBlockNumber as in the `verifyWithdrawalCredentials` proof; instead this proof
         * proof is made for the block number of the withdrawal, which may be within 8192 slots of the oracleBlockNumber. 
         * This difference in modifier usage is OK, since it is still not possible to `verifyAndProcessWithdrawal` against a slot that occurred
         * *prior* to the proof provided in the `verifyWithdrawalCredentials` function.
         */
        proofIsForValidBlockNumber(Endian.fromLittleEndianUint64(withdrawalProofs.blockNumberRoot))
    {
        /**
         * If the validator status is inactive, then withdrawal credentials were never verified for the validator,
         * and thus we cannot know that the validator is related to this EigenPod at all!
         */
        uint40 validatorIndex = uint40(Endian.fromLittleEndianUint64(withdrawalFields[BeaconChainProofs.WITHDRAWAL_VALIDATOR_INDEX_INDEX]));
        
        require(validatorStatus[validatorIndex] != VALIDATOR_STATUS.INACTIVE,
            "EigenPod.verifyOvercommittedStake: Validator never proven to have withdrawal credentials pointed to this contract");
        // fetch the beacon state root for the specified block
        bytes32 beaconStateRoot = eigenPodManager.getBeaconChainStateRoot(oracleBlockNumber);
        // Verifying the withdrawal as well as the slot
        BeaconChainProofs.verifyWithdrawalProofs(beaconStateRoot, withdrawalProofs, withdrawalFields);
        // Verifying the validator fields, specifically the withdrawable epoch
        BeaconChainProofs.verifyValidatorFields(validatorIndex, beaconStateRoot, validatorFieldsProof, validatorFields);
        uint64 withdrawalAmountGwei = Endian.fromLittleEndianUint64(withdrawalFields[BeaconChainProofs.WITHDRAWAL_VALIDATOR_AMOUNT_INDEX]);
        //check if the withdrawal occured after mostRecentWithdrawalBlockNumber
        uint64 slot = Endian.fromLittleEndianUint64(withdrawalProofs.slotRoot);
        /**
         * if the validator's withdrawable epoch is less than or equal to the slot's epoch, then the validator has fully withdrawn because
         * a full withdrawal is only processable after the withdrawable epoch has passed.
         */
        // reference: uint64 withdrawableEpoch = Endian.fromLittleEndianUint64(validatorFields[BeaconChainProofs.VALIDATOR_WITHDRAWABLE_EPOCH_INDEX]);
        if (Endian.fromLittleEndianUint64(validatorFields[BeaconChainProofs.VALIDATOR_WITHDRAWABLE_EPOCH_INDEX]) <= slot/BeaconChainProofs.SLOTS_PER_EPOCH) {
            _processFullWithdrawal(withdrawalAmountGwei, validatorIndex, beaconChainETHStrategyIndex, podOwner, validatorStatus[validatorIndex]);
        } else {
            _processPartialWithdrawal(slot, withdrawalAmountGwei, validatorIndex, podOwner);
        }
    }
    function _processFullWithdrawal(
        uint64 withdrawalAmountGwei,
        uint40 validatorIndex,
        uint256 beaconChainETHStrategyIndex,
        address recipient,
        VALIDATOR_STATUS status
    ) internal {
        uint256 amountToSend;
        // if the validator has not previously been proven to be "overcommitted"
        if (status == VALIDATOR_STATUS.ACTIVE) {
            // if the withdrawal amount is greater than the REQUIRED_BALANCE_GWEI (i.e. the amount restaked on EigenLayer, per ETH validator)
            if (withdrawalAmountGwei >= REQUIRED_BALANCE_GWEI) {
                // then the excess is immediately withdrawable
                amountToSend = uint256(withdrawalAmountGwei - REQUIRED_BALANCE_GWEI) * uint256(GWEI_TO_WEI);
                // and the extra execution layer ETH in the contract is REQUIRED_BALANCE_GWEI, which must be withdrawn through EigenLayer's normal withdrawal process
                restakedExecutionLayerGwei += REQUIRED_BALANCE_GWEI;
            } else {
                // otherwise, just use the full withdrawal amount to continue to "back" the podOwner's remaining shares in EigenLayer (i.e. none is instantly withdrawable)
                restakedExecutionLayerGwei += withdrawalAmountGwei;
                // remove and undelegate 'extra' (i.e. "overcommitted") shares in EigenLayer
                eigenPodManager.recordOvercommittedBeaconChainETH(podOwner, beaconChainETHStrategyIndex, uint256(REQUIRED_BALANCE_GWEI - withdrawalAmountGwei) * GWEI_TO_WEI);
            }
        // if the validator *has* previously been proven to be "overcommitted"
        } else if (status == VALIDATOR_STATUS.OVERCOMMITTED) {
            // if the withdrawal amount is greater than the REQUIRED_BALANCE_GWEI (i.e. the amount restaked on EigenLayer, per ETH validator)
            if (withdrawalAmountGwei >= REQUIRED_BALANCE_GWEI) {
                // then the excess is immediately withdrawable
                amountToSend = uint256(withdrawalAmountGwei - REQUIRED_BALANCE_GWEI) * uint256(GWEI_TO_WEI);
                // and the extra execution layer ETH in the contract is REQUIRED_BALANCE_GWEI, which must be withdrawn through EigenLayer's normal withdrawal process
                restakedExecutionLayerGwei += REQUIRED_BALANCE_GWEI;
                /**
                 * since in `verifyOvercommittedStake` the podOwner's beaconChainETH shares are decremented by `REQUIRED_BALANCE_WEI`, we must reverse the process here,
                 * in order to allow the podOwner to complete their withdrawal through EigenLayer's normal withdrawal process
                 */
                eigenPodManager.restakeBeaconChainETH(podOwner, REQUIRED_BALANCE_WEI);
            } else {
                // otherwise, just use the full withdrawal amount to continue to "back" the podOwner's remaining shares in EigenLayer (i.e. none is instantly withdrawable)
                restakedExecutionLayerGwei += withdrawalAmountGwei;
                /**
                 * since in `verifyOvercommittedStake` the podOwner's beaconChainETH shares are decremented by `REQUIRED_BALANCE_WEI`, we must reverse the process here,
                 * in order to allow the podOwner to complete their withdrawal through EigenLayer's normal withdrawal process
                 */
                eigenPodManager.restakeBeaconChainETH(podOwner, uint256(withdrawalAmountGwei) * GWEI_TO_WEI);
            }
        // If the validator status is withdrawn, they have already processed their ETH withdrawal
        }  else {
            revert("EigenPod.verifyBeaconChainFullWithdrawal: VALIDATOR_STATUS is WITHDRAWN or invalid VALIDATOR_STATUS");
        }
        // set the ETH validator status to withdrawn
        validatorStatus[validatorIndex] = VALIDATOR_STATUS.WITHDRAWN;
        emit FullWithdrawalRedeemed(validatorIndex, recipient, withdrawalAmountGwei);
        // send ETH to the `recipient`, if applicable
        if (amountToSend != 0) {
            _sendETH(recipient, amountToSend);
        }
    }
    function _processPartialWithdrawal(uint64 withdrawalHappenedSlot, uint64 partialWithdrawalAmountGwei, uint40 validatorIndex, address recipient) internal {
        require(!provenPartialWithdrawal[validatorIndex][withdrawalHappenedSlot], "EigenPod._processPartialWithdrawal: partial withdrawal has already been proven for this slot");
        provenPartialWithdrawal[validatorIndex][withdrawalHappenedSlot] = true;
        emit PartialWithdrawalRedeemed(validatorIndex, recipient, partialWithdrawalAmountGwei);
        // send the ETH to the `recipient`
        _sendETH(recipient, uint256(partialWithdrawalAmountGwei) * uint256(GWEI_TO_WEI));
    }
    /**
     * @notice Transfers `amountWei` in ether from this contract to the specified `recipient` address
     * @notice Called by EigenPodManager to withdrawBeaconChainETH that has been added to the EigenPod's balance due to a withdrawal from the beacon chain.
     * @dev Called during withdrawal or slashing.
     */
    function withdrawRestakedBeaconChainETH(
        address recipient,
        uint256 amountWei
    )
        external
        onlyEigenPodManager
    {
        // reduce the restakedExecutionLayerGwei
        restakedExecutionLayerGwei -= uint64(amountWei / GWEI_TO_WEI);
        emit RestakedBeaconChainETHWithdrawn(recipient, amountWei);
        // transfer ETH from pod to `recipient`
        _sendETH(recipient, amountWei);
    }
    /// @notice Called by the pod owner to withdraw the balance of the pod when `hasRestaked` is set to false
    function withdrawBeforeRestaking() external onlyEigenPodOwner hasNeverRestaked {
        mostRecentWithdrawalBlockNumber = uint32(block.number);
        _sendETH(podOwner, address(this).balance);
    }
    // INTERNAL FUNCTIONS
    function _podWithdrawalCredentials() internal view returns(bytes memory) {
        return abi.encodePacked(bytes1(uint8(1)), bytes11(0), address(this));
    }
    function _sendETH(address recipient, uint256 amountWei) internal {
        delayedWithdrawalRouter.createDelayedWithdrawal{value: amountWei}(podOwner, recipient);
    }
    /**
     * @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[46] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;
    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;
    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);
    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }
    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }
    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }
    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }
    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }
    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }
    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }
    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }
    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }
    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
import "../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;
    uint256 private _status;
    function __ReentrancyGuard_init() internal onlyInitializing {
        __ReentrancyGuard_init_unchained();
    }
    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _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() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
        _;
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.
        return account.code.length > 0;
    }
    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }
    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./Merkle.sol";
import "../libraries/Endian.sol";
//Utility library for parsing and PHASE0 beacon chain block headers
//SSZ Spec: https://github.com/ethereum/consensus-specs/blob/dev/ssz/simple-serialize.md#merkleization
//BeaconBlockHeader Spec: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#beaconblockheader
//BeaconState Spec: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#beaconstate
library BeaconChainProofs {
    // constants are the number of fields and the heights of the different merkle trees used in merkleizing beacon chain containers
    uint256 internal constant NUM_BEACON_BLOCK_HEADER_FIELDS = 5;
    uint256 internal constant BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT = 3;
    uint256 internal constant NUM_BEACON_BLOCK_BODY_FIELDS = 11;
    uint256 internal constant BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT = 4;
    uint256 internal constant NUM_BEACON_STATE_FIELDS = 21;
    uint256 internal constant BEACON_STATE_FIELD_TREE_HEIGHT = 5;
    uint256 internal constant NUM_ETH1_DATA_FIELDS = 3;
    uint256 internal constant ETH1_DATA_FIELD_TREE_HEIGHT = 2;
    uint256 internal constant NUM_VALIDATOR_FIELDS = 8;
    uint256 internal constant VALIDATOR_FIELD_TREE_HEIGHT = 3;
    uint256 internal constant NUM_EXECUTION_PAYLOAD_HEADER_FIELDS = 15;
    uint256 internal constant EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT = 4;
    uint256 internal constant NUM_EXECUTION_PAYLOAD_FIELDS = 15;
    uint256 internal constant EXECUTION_PAYLOAD_FIELD_TREE_HEIGHT = 4;
    // HISTORICAL_ROOTS_LIMIT\t = 2**24, so tree height is 24
    uint256 internal constant HISTORICAL_ROOTS_TREE_HEIGHT = 24;
    // HISTORICAL_BATCH is root of state_roots and block_root, so number of leaves =  2^1
    uint256 internal constant HISTORICAL_BATCH_TREE_HEIGHT = 1;
    // SLOTS_PER_HISTORICAL_ROOT = 2**13, so tree height is 13
    uint256 internal constant STATE_ROOTS_TREE_HEIGHT = 13;
    uint256 internal constant BLOCK_ROOTS_TREE_HEIGHT = 13;
    uint256 internal constant NUM_WITHDRAWAL_FIELDS = 4;
    // tree height for hash tree of an individual withdrawal container
    uint256 internal constant WITHDRAWAL_FIELD_TREE_HEIGHT = 2;
    uint256 internal constant VALIDATOR_TREE_HEIGHT = 40;
    //refer to the eigenlayer-cli proof library.  Despite being the same dimensions as the validator tree, the balance tree is merkleized differently
    uint256 internal constant BALANCE_TREE_HEIGHT = 38;
    // MAX_WITHDRAWALS_PER_PAYLOAD = 2**4, making tree height = 4
    uint256 internal constant WITHDRAWALS_TREE_HEIGHT = 4;
    //in beacon block body
    uint256 internal constant EXECUTION_PAYLOAD_INDEX = 9;
    // in beacon block header
    uint256 internal constant STATE_ROOT_INDEX = 3;
    uint256 internal constant PROPOSER_INDEX_INDEX = 1;
    uint256 internal constant SLOT_INDEX = 0;
    uint256 internal constant BODY_ROOT_INDEX = 4;
    // in beacon state
    uint256 internal constant STATE_ROOTS_INDEX = 6;
    uint256 internal constant BLOCK_ROOTS_INDEX = 5;
    uint256 internal constant HISTORICAL_ROOTS_INDEX = 7;
    uint256 internal constant ETH_1_ROOT_INDEX = 8;
    uint256 internal constant VALIDATOR_TREE_ROOT_INDEX = 11;
    uint256 internal constant BALANCE_INDEX = 12;
    uint256 internal constant EXECUTION_PAYLOAD_HEADER_INDEX = 24;
    uint256 internal constant HISTORICAL_BATCH_STATE_ROOT_INDEX = 1;
    // in validator
    uint256 internal constant VALIDATOR_WITHDRAWAL_CREDENTIALS_INDEX = 1;
    uint256 internal constant VALIDATOR_BALANCE_INDEX = 2;
    uint256 internal constant VALIDATOR_SLASHED_INDEX = 3;
    uint256 internal constant VALIDATOR_WITHDRAWABLE_EPOCH_INDEX = 7;
    
    // in execution payload header
    uint256 internal constant BLOCK_NUMBER_INDEX = 6;
    uint256 internal constant WITHDRAWALS_ROOT_INDEX = 14;
    //in execution payload
    uint256 internal constant WITHDRAWALS_INDEX = 14;
    // in withdrawal
    uint256 internal constant WITHDRAWAL_VALIDATOR_INDEX_INDEX = 1;
    uint256 internal constant WITHDRAWAL_VALIDATOR_AMOUNT_INDEX = 3;
    //In historicalBatch
    uint256 internal constant HISTORICALBATCH_STATEROOTS_INDEX = 1;
    //Misc Constants
    uint256 internal constant SLOTS_PER_EPOCH = 32;
    bytes8 internal constant UINT64_MASK = 0xffffffffffffffff;
    struct WithdrawalProofs {
        bytes blockHeaderProof;
        bytes withdrawalProof;
        bytes slotProof;
        bytes executionPayloadProof;
        bytes blockNumberProof;
        uint64 blockHeaderRootIndex;
        uint64 withdrawalIndex;
        bytes32 blockHeaderRoot;
        bytes32 blockBodyRoot;
        bytes32 slotRoot;
        bytes32 blockNumberRoot;
        bytes32 executionPayloadRoot;
    }
    struct ValidatorFieldsAndBalanceProofs {
        bytes validatorFieldsProof;
        bytes validatorBalanceProof;
        bytes32 balanceRoot;
    }
    struct ValidatorFieldsProof {
        bytes validatorProof;
        uint40 validatorIndex;
    }
    /**
     * 
     * @notice This function is parses the balanceRoot to get the uint64 balance of a validator.  During merkleization of the
     * beacon state balance tree, four uint64 values (making 32 bytes) are grouped together and treated as a single leaf in the merkle tree. Thus the
     * validatorIndex mod 4 is used to determine which of the four uint64 values to extract from the balanceRoot.
     * @param validatorIndex is the index of the validator being proven for.
     * @param balanceRoot is the combination of 4 validator balances being proven for.
     * @return The validator's balance, in Gwei
     */
   function getBalanceFromBalanceRoot(uint40 validatorIndex, bytes32 balanceRoot) internal pure returns (uint64) {
        uint256 bitShiftAmount = (validatorIndex % 4) * 64;
        bytes32 validatorBalanceLittleEndian = bytes32((uint256(balanceRoot) << bitShiftAmount));
        uint64 validatorBalance = Endian.fromLittleEndianUint64(validatorBalanceLittleEndian);
        return validatorBalance;
    }
    /**
     * @notice This function verifies merkle proofs of the fields of a certain validator against a beacon chain state root
     * @param validatorIndex the index of the proven validator
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param proof is the data used in proving the validator's fields
     * @param validatorFields the claimed fields of the validator
     */
    function verifyValidatorFields(
        uint40 validatorIndex,
        bytes32 beaconStateRoot,
        bytes calldata proof, 
        bytes32[] calldata validatorFields
    ) internal view {
        
        require(validatorFields.length == 2**VALIDATOR_FIELD_TREE_HEIGHT, "BeaconChainProofs.verifyValidatorFields: Validator fields has incorrect length");
        /**
         * Note: the length of the validator merkle proof is BeaconChainProofs.VALIDATOR_TREE_HEIGHT + 1.
         * There is an additional layer added by hashing the root with the length of the validator list
         */
        require(proof.length == 32 * ((VALIDATOR_TREE_HEIGHT + 1) + BEACON_STATE_FIELD_TREE_HEIGHT), "BeaconChainProofs.verifyValidatorFields: Proof has incorrect length");
        uint256 index = (VALIDATOR_TREE_ROOT_INDEX << (VALIDATOR_TREE_HEIGHT + 1)) | uint256(validatorIndex);
        // merkleize the validatorFields to get the leaf to prove
        bytes32 validatorRoot = Merkle.merkleizeSha256(validatorFields);
        // verify the proof of the validatorRoot against the beaconStateRoot
        require(Merkle.verifyInclusionSha256(proof, beaconStateRoot, validatorRoot, index), "BeaconChainProofs.verifyValidatorFields: Invalid merkle proof");
    }
    /**
     * @notice This function verifies merkle proofs of the balance of a certain validator against a beacon chain state root
     * @param validatorIndex the index of the proven validator
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param proof is the proof of the balance against the beacon chain state root
     * @param balanceRoot is the serialized balance used to prove the balance of the validator (refer to `getBalanceFromBalanceRoot` above for detailed explanation)
     */
    function verifyValidatorBalance(
        uint40 validatorIndex,
        bytes32 beaconStateRoot,
        bytes calldata proof,
        bytes32 balanceRoot
    ) internal view {
        require(proof.length == 32 * ((BALANCE_TREE_HEIGHT + 1) + BEACON_STATE_FIELD_TREE_HEIGHT), "BeaconChainProofs.verifyValidatorBalance: Proof has incorrect length");
        /**
        * the beacon state's balance list is a list of uint64 values, and these are grouped together in 4s when merkleized.  
        * Therefore, the index of the balance of a validator is validatorIndex/4
        */
        uint256 balanceIndex = uint256(validatorIndex/4);
        balanceIndex = (BALANCE_INDEX << (BALANCE_TREE_HEIGHT + 1)) | balanceIndex;
        require(Merkle.verifyInclusionSha256(proof, beaconStateRoot, balanceRoot, balanceIndex), "BeaconChainProofs.verifyValidatorBalance: Invalid merkle proof");
    }
    /**
     * @notice This function verifies the slot and the withdrawal fields for a given withdrawal
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param proofs is the provided set of merkle proofs
     * @param withdrawalFields is the serialized withdrawal container to be proven
     */
    function verifyWithdrawalProofs(
        bytes32 beaconStateRoot,
        WithdrawalProofs calldata proofs,
        bytes32[] calldata withdrawalFields
    ) internal view {
        require(withdrawalFields.length == 2**WITHDRAWAL_FIELD_TREE_HEIGHT, "BeaconChainProofs.verifyWithdrawalProofs: withdrawalFields has incorrect length");
        require(proofs.blockHeaderRootIndex < 2**BLOCK_ROOTS_TREE_HEIGHT, "BeaconChainProofs.verifyWithdrawalProofs: blockRootIndex is too large");
        require(proofs.withdrawalIndex < 2**WITHDRAWALS_TREE_HEIGHT, "BeaconChainProofs.verifyWithdrawalProofs: withdrawalIndex is too large");
       
        // verify the block header proof length
        require(proofs.blockHeaderProof.length == 32 * (BEACON_STATE_FIELD_TREE_HEIGHT + BLOCK_ROOTS_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: blockHeaderProof has incorrect length");
        require(proofs.withdrawalProof.length == 32 * (EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT + WITHDRAWALS_TREE_HEIGHT + 1),
            "BeaconChainProofs.verifyWithdrawalProofs: withdrawalProof has incorrect length");
        require(proofs.executionPayloadProof.length == 32 * (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT + BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: executionPayloadProof has incorrect length");
        require(proofs.slotProof.length == 32 * (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: slotProof has incorrect length");
        require(proofs.blockNumberProof.length == 32 * (EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawalProofs: blockNumberProof has incorrect length");
        /**
         * Computes the block_header_index relative to the beaconStateRoot.  It concatenates the indexes of all the
         * intermediate root indexes from the bottom of the sub trees (the block header container) to the top of the tree
         */
        uint256 blockHeaderIndex = BLOCK_ROOTS_INDEX << (BLOCK_ROOTS_TREE_HEIGHT)  | uint256(proofs.blockHeaderRootIndex);
        // Verify the blockHeaderRoot against the beaconStateRoot
        require(Merkle.verifyInclusionSha256(proofs.blockHeaderProof, beaconStateRoot, proofs.blockHeaderRoot, blockHeaderIndex),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid block header merkle proof");
        //Next we verify the slot against the blockHeaderRoot
        require(Merkle.verifyInclusionSha256(proofs.slotProof, proofs.blockHeaderRoot, proofs.slotRoot, SLOT_INDEX), "BeaconChainProofs.verifyWithdrawalProofs: Invalid slot merkle proof");
        // Next we verify the executionPayloadRoot against the blockHeaderRoot
        uint256 executionPayloadIndex = BODY_ROOT_INDEX << (BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT)| EXECUTION_PAYLOAD_INDEX ;
        require(Merkle.verifyInclusionSha256(proofs.executionPayloadProof, proofs.blockHeaderRoot, proofs.executionPayloadRoot, executionPayloadIndex),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid executionPayload merkle proof");
        // Next we verify the blockNumberRoot against the executionPayload root
        require(Merkle.verifyInclusionSha256(proofs.blockNumberProof, proofs.executionPayloadRoot, proofs.blockNumberRoot, BLOCK_NUMBER_INDEX),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid blockNumber merkle proof");
        /**
         * Next we verify the withdrawal fields against the blockHeaderRoot:
         * First we compute the withdrawal_index relative to the blockHeaderRoot by concatenating the indexes of all the 
         * intermediate root indexes from the bottom of the sub trees (the withdrawal container) to the top, the blockHeaderRoot.
         * Then we calculate merkleize the withdrawalFields container to calculate the the withdrawalRoot.
         * Finally we verify the withdrawalRoot against the executionPayloadRoot.
         */
        uint256 withdrawalIndex = WITHDRAWALS_INDEX << (WITHDRAWALS_TREE_HEIGHT + 1) | uint256(proofs.withdrawalIndex);
        bytes32 withdrawalRoot = Merkle.merkleizeSha256(withdrawalFields);
        require(Merkle.verifyInclusionSha256(proofs.withdrawalProof, proofs.executionPayloadRoot, withdrawalRoot, withdrawalIndex),
            "BeaconChainProofs.verifyWithdrawalProofs: Invalid withdrawal merkle proof");
    }
}// SPDX-License-Identifier: Unlicense
/*
 * @title Solidity Bytes Arrays Utils
 * @author Gonçalo Sá <[email protected]>
 *
 * @dev Bytes tightly packed arrays utility library for ethereum contracts written in Solidity.
 *      The library lets you concatenate, slice and type cast bytes arrays both in memory and storage.
 */
pragma solidity >=0.8.0 <0.9.0;
library BytesLib {
    function concat(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bytes memory) {
        bytes memory tempBytes;
        assembly {
            // Get a location of some free memory and store it in tempBytes as
            // Solidity does for memory variables.
            tempBytes := mload(0x40)
            // Store the length of the first bytes array at the beginning of
            // the memory for tempBytes.
            let length := mload(_preBytes)
            mstore(tempBytes, length)
            // Maintain a memory counter for the current write location in the
            // temp bytes array by adding the 32 bytes for the array length to
            // the starting location.
            let mc := add(tempBytes, 0x20)
            // Stop copying when the memory counter reaches the length of the
            // first bytes array.
            let end := add(mc, length)
            for {
                // Initialize a copy counter to the start of the _preBytes data,
                // 32 bytes into its memory.
                let cc := add(_preBytes, 0x20)
            } lt(mc, end) {
                // Increase both counters by 32 bytes each iteration.
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                // Write the _preBytes data into the tempBytes memory 32 bytes
                // at a time.
                mstore(mc, mload(cc))
            }
            // Add the length of _postBytes to the current length of tempBytes
            // and store it as the new length in the first 32 bytes of the
            // tempBytes memory.
            length := mload(_postBytes)
            mstore(tempBytes, add(length, mload(tempBytes)))
            // Move the memory counter back from a multiple of 0x20 to the
            // actual end of the _preBytes data.
            mc := end
            // Stop copying when the memory counter reaches the new combined
            // length of the arrays.
            end := add(mc, length)
            for { let cc := add(_postBytes, 0x20) } lt(mc, end) {
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } { mstore(mc, mload(cc)) }
            // Update the free-memory pointer by padding our last write location
            // to 32 bytes: add 31 bytes to the end of tempBytes to move to the
            // next 32 byte block, then round down to the nearest multiple of
            // 32. If the sum of the length of the two arrays is zero then add
            // one before rounding down to leave a blank 32 bytes (the length block with 0).
            mstore(
                0x40,
                and(
                    add(add(end, iszero(add(length, mload(_preBytes)))), 31),
                    not(31) // Round down to the nearest 32 bytes.
                )
            )
        }
        return tempBytes;
    }
    function concatStorage(bytes storage _preBytes, bytes memory _postBytes) internal {
        assembly {
            // Read the first 32 bytes of _preBytes storage, which is the length
            // of the array. (We don't need to use the offset into the slot
            // because arrays use the entire slot.)
            let fslot := sload(_preBytes.slot)
            // Arrays of 31 bytes or less have an even value in their slot,
            // while longer arrays have an odd value. The actual length is
            // the slot divided by two for odd values, and the lowest order
            // byte divided by two for even values.
            // If the slot is even, bitwise and the slot with 255 and divide by
            // two to get the length. If the slot is odd, bitwise and the slot
            // with -1 and divide by two.
            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
            let mlength := mload(_postBytes)
            let newlength := add(slength, mlength)
            // slength can contain both the length and contents of the array
            // if length < 32 bytes so let's prepare for that
            // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
            switch add(lt(slength, 32), lt(newlength, 32))
            case 2 {
                // Since the new array still fits in the slot, we just need to
                // update the contents of the slot.
                // uint256(bytes_storage) = uint256(bytes_storage) + uint256(bytes_memory) + new_length
                sstore(
                    _preBytes.slot,
                    // all the modifications to the slot are inside this
                    // next block
                    add(
                        // we can just add to the slot contents because the
                        // bytes we want to change are the LSBs
                        fslot,
                        add(
                            mul(
                                div(
                                    // load the bytes from memory
                                    mload(add(_postBytes, 0x20)),
                                    // zero all bytes to the right
                                    exp(0x100, sub(32, mlength))
                                ),
                                // and now shift left the number of bytes to
                                // leave space for the length in the slot
                                exp(0x100, sub(32, newlength))
                            ),
                            // increase length by the double of the memory
                            // bytes length
                            mul(mlength, 2)
                        )
                    )
                )
            }
            case 1 {
                // The stored value fits in the slot, but the combined value
                // will exceed it.
                // get the keccak hash to get the contents of the array
                mstore(0x0, _preBytes.slot)
                let sc := add(keccak256(0x0, 0x20), div(slength, 32))
                // save new length
                sstore(_preBytes.slot, add(mul(newlength, 2), 1))
                // The contents of the _postBytes array start 32 bytes into
                // the structure. Our first read should obtain the `submod`
                // bytes that can fit into the unused space in the last word
                // of the stored array. To get this, we read 32 bytes starting
                // from `submod`, so the data we read overlaps with the array
                // contents by `submod` bytes. Masking the lowest-order
                // `submod` bytes allows us to add that value directly to the
                // stored value.
                let submod := sub(32, slength)
                let mc := add(_postBytes, submod)
                let end := add(_postBytes, mlength)
                let mask := sub(exp(0x100, submod), 1)
                sstore(
                    sc,
                    add(
                        and(fslot, 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00),
                        and(mload(mc), mask)
                    )
                )
                for {
                    mc := add(mc, 0x20)
                    sc := add(sc, 1)
                } lt(mc, end) {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } { sstore(sc, mload(mc)) }
                mask := exp(0x100, sub(mc, end))
                sstore(sc, mul(div(mload(mc), mask), mask))
            }
            default {
                // get the keccak hash to get the contents of the array
                mstore(0x0, _preBytes.slot)
                // Start copying to the last used word of the stored array.
                let sc := add(keccak256(0x0, 0x20), div(slength, 32))
                // save new length
                sstore(_preBytes.slot, add(mul(newlength, 2), 1))
                // Copy over the first `submod` bytes of the new data as in
                // case 1 above.
                let slengthmod := mod(slength, 32)
                // solhint-disable-next-line no-unused-vars
                let mlengthmod := mod(mlength, 32)
                let submod := sub(32, slengthmod)
                let mc := add(_postBytes, submod)
                let end := add(_postBytes, mlength)
                let mask := sub(exp(0x100, submod), 1)
                sstore(sc, add(sload(sc), and(mload(mc), mask)))
                for {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } lt(mc, end) {
                    sc := add(sc, 1)
                    mc := add(mc, 0x20)
                } { sstore(sc, mload(mc)) }
                mask := exp(0x100, sub(mc, end))
                sstore(sc, mul(div(mload(mc), mask), mask))
            }
        }
    }
    function slice(bytes memory _bytes, uint256 _start, uint256 _length) internal pure returns (bytes memory) {
        require(_length + 31 >= _length, "slice_overflow");
        require(_bytes.length >= _start + _length, "slice_outOfBounds");
        bytes memory tempBytes;
        assembly {
            switch iszero(_length)
            case 0 {
                // Get a location of some free memory and store it in tempBytes as
                // Solidity does for memory variables.
                tempBytes := mload(0x40)
                // The first word of the slice result is potentially a partial
                // word read from the original array. To read it, we calculate
                // the length of that partial word and start copying that many
                // bytes into the array. The first word we copy will start with
                // data we don't care about, but the last `lengthmod` bytes will
                // land at the beginning of the contents of the new array. When
                // we're done copying, we overwrite the full first word with
                // the actual length of the slice.
                let lengthmod := and(_length, 31)
                // The multiplication in the next line is necessary
                // because when slicing multiples of 32 bytes (lengthmod == 0)
                // the following copy loop was copying the origin's length
                // and then ending prematurely not copying everything it should.
                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
                let end := add(mc, _length)
                for {
                    // The multiplication in the next line has the same exact purpose
                    // as the one above.
                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
                } lt(mc, end) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } { mstore(mc, mload(cc)) }
                mstore(tempBytes, _length)
                //update free-memory pointer
                //allocating the array padded to 32 bytes like the compiler does now
                mstore(0x40, and(add(mc, 31), not(31)))
            }
            //if we want a zero-length slice let's just return a zero-length array
            default {
                tempBytes := mload(0x40)
                //zero out the 32 bytes slice we are about to return
                //we need to do it because Solidity does not garbage collect
                mstore(tempBytes, 0)
                mstore(0x40, add(tempBytes, 0x20))
            }
        }
        return tempBytes;
    }
    function toAddress(bytes memory _bytes, uint256 _start) internal pure returns (address) {
        require(_bytes.length >= _start + 20, "toAddress_outOfBounds");
        address tempAddress;
        assembly {
            tempAddress := div(mload(add(add(_bytes, 0x20), _start)), 0x1000000000000000000000000)
        }
        return tempAddress;
    }
    function toUint8(bytes memory _bytes, uint256 _start) internal pure returns (uint8) {
        require(_bytes.length >= _start + 1, "toUint8_outOfBounds");
        uint8 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x1), _start))
        }
        return tempUint;
    }
    function toUint16(bytes memory _bytes, uint256 _start) internal pure returns (uint16) {
        require(_bytes.length >= _start + 2, "toUint16_outOfBounds");
        uint16 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x2), _start))
        }
        return tempUint;
    }
    function toUint32(bytes memory _bytes, uint256 _start) internal pure returns (uint32) {
        require(_bytes.length >= _start + 4, "toUint32_outOfBounds");
        uint32 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x4), _start))
        }
        return tempUint;
    }
    function toUint64(bytes memory _bytes, uint256 _start) internal pure returns (uint64) {
        require(_bytes.length >= _start + 8, "toUint64_outOfBounds");
        uint64 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x8), _start))
        }
        return tempUint;
    }
    function toUint96(bytes memory _bytes, uint256 _start) internal pure returns (uint96) {
        require(_bytes.length >= _start + 12, "toUint96_outOfBounds");
        uint96 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0xc), _start))
        }
        return tempUint;
    }
    function toUint128(bytes memory _bytes, uint256 _start) internal pure returns (uint128) {
        require(_bytes.length >= _start + 16, "toUint128_outOfBounds");
        uint128 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x10), _start))
        }
        return tempUint;
    }
    function toUint256(bytes memory _bytes, uint256 _start) internal pure returns (uint256) {
        require(_bytes.length >= _start + 32, "toUint256_outOfBounds");
        uint256 tempUint;
        assembly {
            tempUint := mload(add(add(_bytes, 0x20), _start))
        }
        return tempUint;
    }
    function toBytes32(bytes memory _bytes, uint256 _start) internal pure returns (bytes32) {
        require(_bytes.length >= _start + 32, "toBytes32_outOfBounds");
        bytes32 tempBytes32;
        assembly {
            tempBytes32 := mload(add(add(_bytes, 0x20), _start))
        }
        return tempBytes32;
    }
    function equal(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bool) {
        bool success = true;
        assembly {
            let length := mload(_preBytes)
            // if lengths don't match the arrays are not equal
            switch eq(length, mload(_postBytes))
            case 1 {
                // cb is a circuit breaker in the for loop since there's
                //  no said feature for inline assembly loops
                // cb = 1 - don't breaker
                // cb = 0 - break
                let cb := 1
                let mc := add(_preBytes, 0x20)
                let end := add(mc, length)
                for { let cc := add(_postBytes, 0x20) }
                // the next line is the loop condition:
                // while(uint256(mc < end) + cb == 2)
                eq(add(lt(mc, end), cb), 2) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    // if any of these checks fails then arrays are not equal
                    if iszero(eq(mload(mc), mload(cc))) {
                        // unsuccess:
                        success := 0
                        cb := 0
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }
        return success;
    }
    function equalStorage(bytes storage _preBytes, bytes memory _postBytes) internal view returns (bool) {
        bool success = true;
        assembly {
            // we know _preBytes_offset is 0
            let fslot := sload(_preBytes.slot)
            // Decode the length of the stored array like in concatStorage().
            let slength := div(and(fslot, sub(mul(0x100, iszero(and(fslot, 1))), 1)), 2)
            let mlength := mload(_postBytes)
            // if lengths don't match the arrays are not equal
            switch eq(slength, mlength)
            case 1 {
                // slength can contain both the length and contents of the array
                // if length < 32 bytes so let's prepare for that
                // v. http://solidity.readthedocs.io/en/latest/miscellaneous.html#layout-of-state-variables-in-storage
                if iszero(iszero(slength)) {
                    switch lt(slength, 32)
                    case 1 {
                        // blank the last byte which is the length
                        fslot := mul(div(fslot, 0x100), 0x100)
                        if iszero(eq(fslot, mload(add(_postBytes, 0x20)))) {
                            // unsuccess:
                            success := 0
                        }
                    }
                    default {
                        // cb is a circuit breaker in the for loop since there's
                        //  no said feature for inline assembly loops
                        // cb = 1 - don't breaker
                        // cb = 0 - break
                        let cb := 1
                        // get the keccak hash to get the contents of the array
                        mstore(0x0, _preBytes.slot)
                        let sc := keccak256(0x0, 0x20)
                        let mc := add(_postBytes, 0x20)
                        let end := add(mc, mlength)
                        // the next line is the loop condition:
                        // while(uint256(mc < end) + cb == 2)
                        // solhint-disable-next-line no-empty-blocks
                        for {} eq(add(lt(mc, end), cb), 2) {
                            sc := add(sc, 1)
                            mc := add(mc, 0x20)
                        } {
                            if iszero(eq(sload(sc), mload(mc))) {
                                // unsuccess:
                                success := 0
                                cb := 0
                            }
                        }
                    }
                }
            }
            default {
                // unsuccess:
                success := 0
            }
        }
        return success;
    }
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
library Endian {
    /**
     * @notice Converts a little endian-formatted uint64 to a big endian-formatted uint64
     * @param lenum little endian-formatted uint64 input, provided as 'bytes32' type
     * @return n The big endian-formatted uint64
     * @dev Note that the input is formatted as a 'bytes32' type (i.e. 256 bits), but it is immediately truncated to a uint64 (i.e. 64 bits)
     * through a right-shift/shr operation.
     */
    function fromLittleEndianUint64(
        bytes32 lenum
    ) internal pure returns (uint64 n) {
        // the number needs to be stored in little-endian encoding (ie in bytes 0-8)
        n = uint64(uint256(lenum >> 192));
        return
            (n >> 56) |
            ((0x00FF000000000000 & n) >> 40) |
            ((0x0000FF0000000000 & n) >> 24) |
            ((0x000000FF00000000 & n) >> 8) |
            ((0x00000000FF000000 & n) << 8) |
            ((0x0000000000FF0000 & n) << 24) |
            ((0x000000000000FF00 & n) << 40) |
            ((0x00000000000000FF & n) << 56);
    }
}
// ┏━━━┓━┏┓━┏┓━━┏━━━┓━━┏━━━┓━━━━┏━━━┓━━━━━━━━━━━━━━━━━━━┏┓━━━━━┏━━━┓━━━━━━━━━┏┓━━━━━━━━━━━━━━┏┓━
// ┃┏━━┛┏┛┗┓┃┃━━┃┏━┓┃━━┃┏━┓┃━━━━┗┓┏┓┃━━━━━━━━━━━━━━━━━━┏┛┗┓━━━━┃┏━┓┃━━━━━━━━┏┛┗┓━━━━━━━━━━━━┏┛┗┓
// ┃┗━━┓┗┓┏┛┃┗━┓┗┛┏┛┃━━┃┃━┃┃━━━━━┃┃┃┃┏━━┓┏━━┓┏━━┓┏━━┓┏┓┗┓┏┛━━━━┃┃━┗┛┏━━┓┏━┓━┗┓┏┛┏━┓┏━━┓━┏━━┓┗┓┏┛
// ┃┏━━┛━┃┃━┃┏┓┃┏━┛┏┛━━┃┃━┃┃━━━━━┃┃┃┃┃┏┓┃┃┏┓┃┃┏┓┃┃━━┫┣┫━┃┃━━━━━┃┃━┏┓┃┏┓┃┃┏┓┓━┃┃━┃┏┛┗━┓┃━┃┏━┛━┃┃━
// ┃┗━━┓━┃┗┓┃┃┃┃┃┃┗━┓┏┓┃┗━┛┃━━━━┏┛┗┛┃┃┃━┫┃┗┛┃┃┗┛┃┣━━┃┃┃━┃┗┓━━━━┃┗━┛┃┃┗┛┃┃┃┃┃━┃┗┓┃┃━┃┗┛┗┓┃┗━┓━┃┗┓
// ┗━━━┛━┗━┛┗┛┗┛┗━━━┛┗┛┗━━━┛━━━━┗━━━┛┗━━┛┃┏━┛┗━━┛┗━━┛┗┛━┗━┛━━━━┗━━━┛┗━━┛┗┛┗┛━┗━┛┗┛━┗━━━┛┗━━┛━┗━┛
// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┃┃━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
// ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┗┛━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
// SPDX-License-Identifier: CC0-1.0
pragma solidity =0.8.12;
// This interface is designed to be compatible with the Vyper version.
/// @notice This is the Ethereum 2.0 deposit contract interface.
/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs
interface IETHPOSDeposit {
    /// @notice A processed deposit event.
    event DepositEvent(bytes pubkey, bytes withdrawal_credentials, bytes amount, bytes signature, bytes index);
    /// @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;
    /// @notice Query the current deposit root hash.
    /// @return The deposit root hash.
    function get_deposit_root() external view returns (bytes32);
    /// @notice Query the current deposit count.
    /// @return The deposit count encoded as a little endian 64-bit number.
    function get_deposit_count() external view returns (bytes memory);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IStrategyManager.sol";
import "./IEigenPod.sol";
import "./IBeaconChainOracle.sol";
import "./IPausable.sol";
/**
 * @title Interface for factory that creates and manages solo staking pods that have their withdrawal credentials pointed to EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface IEigenPodManager is IPausable {
    /**
     * @notice Creates an EigenPod for the sender.
     * @dev Function will revert if the `msg.sender` already has an EigenPod.
     */
    function createPod() external;
    /**
     * @notice Stakes for a new beacon chain validator on the sender's EigenPod. 
     * Also creates an EigenPod for the sender if they don't have one already.
     * @param pubkey The 48 bytes public key of the beacon chain validator.
     * @param signature The validator's signature of the deposit data.
     * @param depositDataRoot The root/hash of the deposit data for the validator's deposit.
     */
    function stake(bytes calldata pubkey, bytes calldata signature, bytes32 depositDataRoot) external payable;
    /**
     * @notice Deposits/Restakes beacon chain ETH in EigenLayer on behalf of the owner of an EigenPod.
     * @param podOwner The owner of the pod whose balance must be deposited.
     * @param amount The amount of ETH to 'deposit' (i.e. be credited to the podOwner).
     * @dev Callable only by the podOwner's EigenPod contract.
     */
    function restakeBeaconChainETH(address podOwner, uint256 amount) external;
    /**
     * @notice Removes beacon chain ETH from EigenLayer on behalf of the owner of an EigenPod, when the
     *         balance of a validator is lower than how much stake they have committed to EigenLayer
     * @param podOwner The owner of the pod whose balance must be removed.
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *                                    the StrategyManager in case it must be removed from the list of the podOwner's strategies
     * @param amount The amount of ETH to remove.
     * @dev Callable only by the podOwner's EigenPod contract.
     */
    function recordOvercommittedBeaconChainETH(address podOwner, uint256 beaconChainETHStrategyIndex, uint256 amount) external;
    
    /**
     * @notice Withdraws ETH from an EigenPod. The ETH must have first been withdrawn from the beacon chain.
     * @param podOwner The owner of the pod whose balance must be withdrawn.
     * @param recipient The recipient of the withdrawn ETH.
     * @param amount The amount of ETH to withdraw.
     * @dev Callable only by the StrategyManager contract.
     */
    function withdrawRestakedBeaconChainETH(address podOwner, address recipient, uint256 amount) external;
    /**
     * @notice Updates the oracle contract that provides the beacon chain state root
     * @param newBeaconChainOracle is the new oracle contract being pointed to
     * @dev Callable only by the owner of this contract (i.e. governance)
     */
    function updateBeaconChainOracle(IBeaconChainOracle newBeaconChainOracle) external;
    /// @notice Returns the address of the `podOwner`'s EigenPod if it has been deployed.
    function ownerToPod(address podOwner) external view returns(IEigenPod);
    /// @notice Returns the address of the `podOwner`'s EigenPod (whether it is deployed yet or not).
    function getPod(address podOwner) external view returns(IEigenPod);
    /// @notice Oracle contract that provides updates to the beacon chain's state
    function beaconChainOracle() external view returns(IBeaconChainOracle);    
    /// @notice Returns the Beacon Chain state root at `blockNumber`. Reverts if the Beacon Chain state root at `blockNumber` has not yet been finalized.
    function getBeaconChainStateRoot(uint64 blockNumber) external view returns(bytes32);
    /// @notice EigenLayer's StrategyManager contract
    function strategyManager() external view returns(IStrategyManager);
    /// @notice EigenLayer's Slasher contract
    function slasher() external view returns(ISlasher);
    function hasPod(address podOwner) external view returns (bool);
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "../libraries/BeaconChainProofs.sol";
import "./IEigenPodManager.sol";
import "./IBeaconChainOracle.sol";
/**
 * @title The implementation contract used for restaking beacon chain ETH on EigenLayer 
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice The main functionalities are:
 * - creating new ETH validators with their withdrawal credentials pointed to this contract
 * - proving from beacon chain state roots that withdrawal credentials are pointed to this contract
 * - proving from beacon chain state roots the balances of ETH validators with their withdrawal credentials
 *   pointed to this contract
 * - updating aggregate balances in the EigenPodManager
 * - withdrawing eth when withdrawals are initiated
 * @dev Note that all beacon chain balances are stored as gwei within the beacon chain datastructures. We choose
 *   to account balances in terms of gwei in the EigenPod contract and convert to wei when making calls to other contracts
 */
interface IEigenPod {
    enum VALIDATOR_STATUS {
        INACTIVE, // doesnt exist
        ACTIVE, // staked on ethpos and withdrawal credentials are pointed to the EigenPod
        OVERCOMMITTED, // proven to be overcommitted to EigenLayer
        WITHDRAWN // withdrawn from the Beacon Chain
    }
    // this struct keeps track of PartialWithdrawalClaims
    struct PartialWithdrawalClaim {
        PARTIAL_WITHDRAWAL_CLAIM_STATUS status;
        // block at which the PartialWithdrawalClaim was created
        uint32 creationBlockNumber;
        // last block (inclusive) in which the PartialWithdrawalClaim can be fraudproofed
        uint32 fraudproofPeriodEndBlockNumber;
        // amount of ETH -- in Gwei -- to be withdrawn until completion of this claim
        uint64 partialWithdrawalAmountGwei;
    }
    enum PARTIAL_WITHDRAWAL_CLAIM_STATUS {
        REDEEMED,
        PENDING,
        FAILED
    }
    /// @notice The amount of eth, in gwei, that is restaked per validator
    function REQUIRED_BALANCE_GWEI() external view returns(uint64);
    /// @notice The amount of eth, in wei, that is restaked per validator
    function REQUIRED_BALANCE_WEI() external view returns(uint256);
    /// @notice this is a mapping of validator indices to a Validator struct containing pertinent info about the validator
    function validatorStatus(uint40 validatorIndex) external view returns(VALIDATOR_STATUS);
    /// @notice the amount of execution layer ETH in this contract that is staked in EigenLayer (i.e. withdrawn from beaconchain but not EigenLayer), 
    function restakedExecutionLayerGwei() external view returns(uint64);
    /// @notice Used to initialize the pointers to contracts crucial to the pod's functionality, in beacon proxy construction from EigenPodManager
    function initialize(address owner) external;
    /// @notice Called by EigenPodManager when the owner wants to create another ETH validator.
    function stake(bytes calldata pubkey, bytes calldata signature, bytes32 depositDataRoot) external payable;
    /**
     * @notice Transfers `amountWei` in ether from this contract to the specified `recipient` address
     * @notice Called by EigenPodManager to withdrawBeaconChainETH that has been added to the EigenPod's balance due to a withdrawal from the beacon chain.
     * @dev Called during withdrawal or slashing.
     * @dev Note that this function is marked as non-reentrant to prevent the recipient calling back into it
     */
    function withdrawRestakedBeaconChainETH(address recipient, uint256 amount) external;
    /// @notice The single EigenPodManager for EigenLayer
    function eigenPodManager() external view returns (IEigenPodManager);
    /// @notice The owner of this EigenPod
    function podOwner() external view returns (address);
    /// @notice an indicator of whether or not the podOwner has ever "fully restaked" by successfully calling `verifyCorrectWithdrawalCredentials`.
    function hasRestaked() external view returns (bool);
    /// @notice block number of the most recent withdrawal
    function mostRecentWithdrawalBlockNumber() external view returns (uint64);
    ///@notice mapping that tracks proven partial withdrawals
    function provenPartialWithdrawal(uint40 validatorIndex, uint64 slot) external view returns (bool);
    /**
     * @notice This function verifies that the withdrawal credentials of the podOwner are pointed to
     * this contract. It also verifies the current (not effective) balance  of the validator.  It verifies the provided proof of the ETH validator against the beacon chain state
     * root, marks the validator as 'active' in EigenLayer, and credits the restaked ETH in Eigenlayer.
     * @param oracleBlockNumber is the Beacon Chain blockNumber whose state root the `proof` will be proven against.
     * @param validatorIndex is the index of the validator being proven, refer to consensus specs 
     * @param proofs is the bytes that prove the ETH validator's balance and withdrawal credentials against a beacon chain state root
     * @param validatorFields are the fields of the "Validator Container", refer to consensus specs 
     * for details: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
     */
    function verifyWithdrawalCredentialsAndBalance(
        uint64 oracleBlockNumber,
        uint40 validatorIndex,
        BeaconChainProofs.ValidatorFieldsAndBalanceProofs memory proofs,
        bytes32[] calldata validatorFields
    ) external;
    
    /**
     * @notice This function records an overcommitment of stake to EigenLayer on behalf of a certain ETH validator.
     *         If successful, the overcommitted balance is penalized (available for withdrawal whenever the pod's balance allows).
     *         The ETH validator's shares in the enshrined beaconChainETH strategy are also removed from the StrategyManager and undelegated.
     * @param oracleBlockNumber The oracleBlockNumber whose state root the `proof` will be proven against.
     *        Must be within `VERIFY_OVERCOMMITTED_WINDOW_BLOCKS` of the current block.
     * @param validatorIndex is the index of the validator being proven, refer to consensus specs 
     * @param proofs is the proof of the validator's balance and validatorFields in the balance tree and the balanceRoot to prove for
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *                                    the StrategyManager in case it must be removed from the list of the podOwners strategies
     * @param validatorFields are the fields of the "Validator Container", refer to consensus specs
     * @dev For more details on the Beacon Chain spec, see: https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
     */
    function verifyOvercommittedStake(
        uint40 validatorIndex,
        BeaconChainProofs.ValidatorFieldsAndBalanceProofs calldata proofs,
        bytes32[] calldata validatorFields,
        uint256 beaconChainETHStrategyIndex,
        uint64 oracleBlockNumber
    ) external;
    /**
     * @notice This function records a full withdrawal on behalf of one of the Ethereum validators for this EigenPod
     * @param withdrawalProofs is the information needed to check the veracity of the block number and withdrawal being proven
     * @param validatorFieldsProof is the proof of the validator's fields in the validator tree
     * @param withdrawalFields are the fields of the withdrawal being proven
     * @param validatorFields are the fields of the validator being proven
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy for the pod owner for the callback to 
     *        the EigenPodManager to the StrategyManager in case it must be removed from the podOwner's list of strategies
     */
    function verifyAndProcessWithdrawal(
        BeaconChainProofs.WithdrawalProofs calldata withdrawalProofs, 
        bytes calldata validatorFieldsProof,
        bytes32[] calldata validatorFields,
        bytes32[] calldata withdrawalFields,
        uint256 beaconChainETHStrategyIndex,
        uint64 oracleBlockNumber
    ) external;
    /// @notice Called by the pod owner to withdraw the balance of the pod when `hasRestaked` is set to false
    function withdrawBeforeRestaking() external;
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
interface IDelayedWithdrawalRouter {
    // struct used to pack data into a single storage slot
    struct DelayedWithdrawal {
        uint224 amount;
        uint32 blockCreated;
    }
    // struct used to store a single users delayedWithdrawal data
    struct UserDelayedWithdrawals {
        uint256 delayedWithdrawalsCompleted;
        DelayedWithdrawal[] delayedWithdrawals;
    }
    /** 
     * @notice Creates an delayed withdrawal for `msg.value` to the `recipient`.
     * @dev Only callable by the `podOwner`'s EigenPod contract.
     */
    function createDelayedWithdrawal(address podOwner, address recipient) external payable;
    /**
     * @notice Called in order to withdraw delayed withdrawals made to the `recipient` that have passed the `withdrawalDelayBlocks` period.
     * @param recipient The address to claim delayedWithdrawals for.
     * @param maxNumberOfWithdrawalsToClaim Used to limit the maximum number of withdrawals to loop through claiming.
     */
    function claimDelayedWithdrawals(address recipient, uint256 maxNumberOfWithdrawalsToClaim) external;
    /**
     * @notice Called in order to withdraw delayed withdrawals made to the caller that have passed the `withdrawalDelayBlocks` period.
     * @param maxNumberOfWithdrawalsToClaim Used to limit the maximum number of withdrawals to loop through claiming.
     */
    function claimDelayedWithdrawals(uint256 maxNumberOfWithdrawalsToClaim) external;
    /// @notice Owner-only function for modifying the value of the `withdrawalDelayBlocks` variable.
    function setWithdrawalDelayBlocks(uint256 newValue) external;
    /// @notice Getter function for the mapping `_userWithdrawals`
    function userWithdrawals(address user) external view returns (UserDelayedWithdrawals memory);
    /// @notice Getter function to get all delayedWithdrawals of the `user`
    function getUserDelayedWithdrawals(address user) external view returns (DelayedWithdrawal[] memory);
    /// @notice Getter function to get all delayedWithdrawals that are currently claimable by the `user`
    function getClaimableUserDelayedWithdrawals(address user) external view returns (DelayedWithdrawal[] memory);
    
    /// @notice Getter function for fetching the delayedWithdrawal at the `index`th entry from the `_userWithdrawals[user].delayedWithdrawals` array
    function userDelayedWithdrawalByIndex(address user, uint256 index) external view returns (DelayedWithdrawal memory);
    /// @notice Getter function for fetching the length of the delayedWithdrawals array of a specific user
    function userWithdrawalsLength(address user) external view returns (uint256);
    /// @notice Convenience function for checking whether or not the delayedWithdrawal at the `index`th entry from the `_userWithdrawals[user].delayedWithdrawals` array is currently claimable
    function canClaimDelayedWithdrawal(address user, uint256 index) external view returns (bool);
    /**
     * @notice Delay enforced by this contract for completing any delayedWithdrawal. Measured in blocks, and adjustable by this contract's owner,
     * up to a maximum of `MAX_WITHDRAWAL_DELAY_BLOCKS`. Minimum value is 0 (i.e. no delay enforced).
     */
    function withdrawalDelayBlocks() external view returns (uint256);
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "../interfaces/IPauserRegistry.sol";
/**
 * @title Adds pausability to a contract, with pausing & unpausing controlled by the `pauser` and `unpauser` of a PauserRegistry contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice Contracts that inherit from this contract may define their own `pause` and `unpause` (and/or related) functions.
 * These functions should be permissioned as "onlyPauser" which defers to a `PauserRegistry` for determining access control.
 * @dev Pausability is implemented using a uint256, which allows up to 256 different single bit-flags; each bit can potentially pause different functionality.
 * Inspiration for this was taken from the NearBridge design here https://etherscan.io/address/0x3FEFc5A4B1c02f21cBc8D3613643ba0635b9a873#code.
 * For the `pause` and `unpause` functions we've implemented, if you pause, you can only flip (any number of) switches to on/1 (aka "paused"), and if you unpause,
 * you can only flip (any number of) switches to off/0 (aka "paused").
 * If you want a pauseXYZ function that just flips a single bit / "pausing flag", it will:
 * 1) 'bit-wise and' (aka `&`) a flag with the current paused state (as a uint256)
 * 2) update the paused state to this new value
 * @dev We note as well that we have chosen to identify flags by their *bit index* as opposed to their numerical value, so, e.g. defining `DEPOSITS_PAUSED = 3`
 * indicates specifically that if the *third bit* of `_paused` is flipped -- i.e. it is a '1' -- then deposits should be paused
 */
interface IPausable {
    /// @notice Address of the `PauserRegistry` contract that this contract defers to for determining access control (for pausing).
    function pauserRegistry() external view returns (IPauserRegistry); 
    /**
     * @notice This function is used to pause an EigenLayer contract's functionality.
     * It is permissioned to the `pauser` address, which is expected to be a low threshold multisig.
     * @param newPausedStatus represents the new value for `_paused` to take, which means it may flip several bits at once.
     * @dev This function can only pause functionality, and thus cannot 'unflip' any bit in `_paused` from 1 to 0.
     */
    function pause(uint256 newPausedStatus) external;
    /**
     * @notice Alias for `pause(type(uint256).max)`.
     */
    function pauseAll() external;
    /**
     * @notice This function is used to unpause an EigenLayer contract's functionality.
     * It is permissioned to the `unpauser` address, which is expected to be a high threshold multisig or governance contract.
     * @param newPausedStatus represents the new value for `_paused` to take, which means it may flip several bits at once.
     * @dev This function can only unpause functionality, and thus cannot 'flip' any bit in `_paused` from 0 to 1.
     */
    function unpause(uint256 newPausedStatus) external;
    /// @notice Returns the current paused status as a uint256.
    function paused() external view returns (uint256);
    /// @notice Returns 'true' if the `indexed`th bit of `_paused` is 1, and 'false' otherwise
    function paused(uint8 index) external view returns (bool);
    /// @notice Allows the unpauser to set a new pauser registry
    function setPauserRegistry(IPauserRegistry newPauserRegistry) external;
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Constants shared between 'EigenPod' and 'EigenPodManager' contracts.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
abstract contract EigenPodPausingConstants {
    /// @notice Index for flag that pauses creation of new EigenPods when set. See EigenPodManager code for details.
    uint8 internal constant PAUSED_NEW_EIGENPODS = 0;
    /// @notice Index for flag that pauses the `withdrawRestakedBeaconChainETH` function *of the EigenPodManager* when set. See EigenPodManager code for details.
    uint8 internal constant PAUSED_WITHDRAW_RESTAKED_ETH = 1;
    /// @notice Index for flag that pauses the `verifyCorrectWithdrawalCredentials` function *of the EigenPods* when set. see EigenPod code for details.
    uint8 internal constant PAUSED_EIGENPODS_VERIFY_CREDENTIALS = 2;
    /// @notice Index for flag that pauses the `verifyOvercommittedStake` function *of the EigenPods* when set. see EigenPod code for details.
    uint8 internal constant PAUSED_EIGENPODS_VERIFY_OVERCOMMITTED = 3;
    /// @notice Index for flag that pauses the `verifyBeaconChainFullWithdrawal` function *of the EigenPods* when set. see EigenPod code for details.
    uint8 internal constant PAUSED_EIGENPODS_VERIFY_WITHDRAWAL = 4;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }
    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}
// SPDX-License-Identifier: BUSL-1.1
// Adapted from OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/MerkleProof.sol)
pragma solidity =0.8.12;
/**
 * @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 Merkle {
    /**
     * @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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     * 
     * Note this is for a Merkle tree using the keccak/sha3 hash function
     */
    function verifyInclusionKeccak(
        bytes memory proof,
        bytes32 root,
        bytes32 leaf,
        uint256 index
    ) internal pure returns (bool) {
        return processInclusionProofKeccak(proof, leaf, index) == 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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     * 
     * _Available since v4.4._
     * 
     * Note this is for a Merkle tree using the keccak/sha3 hash function
     */
    function processInclusionProofKeccak(bytes memory proof, bytes32 leaf, uint256 index) internal pure returns (bytes32) {
        require(proof.length != 0 && proof.length % 32 == 0, "Merkle.processInclusionProofKeccak: proof length should be a non-zero multiple of 32");
        bytes32 computedHash = leaf;
        for (uint256 i = 32; i <= proof.length; i+=32) {
            if(index % 2 == 0) {
                // if ith bit of index is 0, then computedHash is a left sibling
                assembly {
                    mstore(0x00, computedHash)
                    mstore(0x20, mload(add(proof, i)))
                    computedHash := keccak256(0x00, 0x40)
                    index := div(index, 2)
                }
            } else {
                // if ith bit of index is 1, then computedHash is a right sibling
                assembly {
                    mstore(0x00, mload(add(proof, i)))
                    mstore(0x20, computedHash)
                    computedHash := keccak256(0x00, 0x40)
                    index := div(index, 2)
                }            
            }
        }
        return computedHash;
    }
    /**
     * @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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     * 
     * Note this is for a Merkle tree using the sha256 hash function
     */
    function verifyInclusionSha256(
        bytes memory proof,
        bytes32 root,
        bytes32 leaf,
        uint256 index
    ) internal view returns (bool) {
        return processInclusionProofSha256(proof, leaf, index) == 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. The tree is built assuming `leaf` is 
     * the 0 indexed `index`'th leaf from the bottom left of the tree.
     *
     * _Available since v4.4._
     * 
     * Note this is for a Merkle tree using the sha256 hash function
     */
    function processInclusionProofSha256(bytes memory proof, bytes32 leaf, uint256 index) internal view returns (bytes32) {
        require(proof.length != 0 && proof.length % 32 == 0, "Merkle.processInclusionProofSha256: proof length should be a non-zero multiple of 32");
        bytes32[1] memory computedHash = [leaf];
        for (uint256 i = 32; i <= proof.length; i+=32) {
            if(index % 2 == 0) {
                // if ith bit of index is 0, then computedHash is a left sibling
                assembly {
                    mstore(0x00, mload(computedHash))
                    mstore(0x20, mload(add(proof, i)))
                    if iszero(staticcall(sub(gas(), 2000), 2, 0x00, 0x40, computedHash, 0x20)) {revert(0, 0)}
                    index := div(index, 2)
                }
            } else {
                // if ith bit of index is 1, then computedHash is a right sibling
                assembly {
                    mstore(0x00, mload(add(proof, i)))
                    mstore(0x20, mload(computedHash))
                    if iszero(staticcall(sub(gas(), 2000), 2, 0x00, 0x40, computedHash, 0x20)) {revert(0, 0)}
                    index := div(index, 2)
                }            
            }
        }
        return computedHash[0];
    }
    /**
     @notice this function returns the merkle root of a tree created from a set of leaves using sha256 as its hash function
     @param leaves the leaves of the merkle tree
     @return The computed Merkle root of the tree.
     @dev A pre-condition to this function is that leaves.length is a power of two.  If not, the function will merkleize the inputs incorrectly.
     */ 
    function merkleizeSha256(
        bytes32[] memory leaves
    ) internal pure returns (bytes32) {
        //there are half as many nodes in the layer above the leaves
        uint256 numNodesInLayer = leaves.length / 2;
        //create a layer to store the internal nodes
        bytes32[] memory layer = new bytes32[](numNodesInLayer);
        //fill the layer with the pairwise hashes of the leaves
        for (uint i = 0; i < numNodesInLayer; i++) {
            layer[i] = sha256(abi.encodePacked(leaves[2*i], leaves[2*i+1]));
        }
        //the next layer above has half as many nodes
        numNodesInLayer /= 2;
        //while we haven't computed the root
        while (numNodesInLayer != 0) {
            //overwrite the first numNodesInLayer nodes in layer with the pairwise hashes of their children
            for (uint i = 0; i < numNodesInLayer; i++) {
                layer[i] = sha256(abi.encodePacked(layer[2*i], layer[2*i+1]));
            }
            //the next layer above has half as many nodes
            numNodesInLayer /= 2;
        }
        //the first node in the layer is the root
        return layer[0];
    }
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IStrategy.sol";
import "./ISlasher.sol";
import "./IDelegationManager.sol";
/**
 * @title Interface for the primary entrypoint for funds into EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice See the `StrategyManager` contract itself for implementation details.
 */
interface IStrategyManager {
    // packed struct for queued withdrawals; helps deal with stack-too-deep errors
    struct WithdrawerAndNonce {
        address withdrawer;
        uint96 nonce;
    }
    /**
     * Struct type used to specify an existing queued withdrawal. Rather than storing the entire struct, only a hash is stored.
     * In functions that operate on existing queued withdrawals -- e.g. `startQueuedWithdrawalWaitingPeriod` or `completeQueuedWithdrawal`,
     * the data is resubmitted and the hash of the submitted data is computed by `calculateWithdrawalRoot` and checked against the
     * stored hash in order to confirm the integrity of the submitted data.
     */
    struct QueuedWithdrawal {
        IStrategy[] strategies;
        uint256[] shares;
        address depositor;
        WithdrawerAndNonce withdrawerAndNonce;
        uint32 withdrawalStartBlock;
        address delegatedAddress;
    }
    /**
     * @notice Deposits `amount` of `token` into the specified `strategy`, with the resultant shares credited to `msg.sender`
     * @param strategy is the specified strategy where deposit is to be made,
     * @param token is the denomination in which the deposit is to be made,
     * @param amount is the amount of token to be deposited in the strategy by the depositor
     * @return shares The amount of new shares in the `strategy` created as part of the action.
     * @dev The `msg.sender` must have previously approved this contract to transfer at least `amount` of `token` on their behalf.
     * @dev Cannot be called by an address that is 'frozen' (this function will revert if the `msg.sender` is frozen).
     * 
     * WARNING: Depositing tokens that allow reentrancy (eg. ERC-777) into a strategy is not recommended.  This can lead to attack vectors
     *          where the token balance and corresponding strategy shares are not in sync upon reentrancy.
     */
    function depositIntoStrategy(IStrategy strategy, IERC20 token, uint256 amount)
        external
        returns (uint256 shares);
    /**
     * @notice Deposits `amount` of beaconchain ETH into this contract on behalf of `staker`
     * @param staker is the entity that is restaking in eigenlayer,
     * @param amount is the amount of beaconchain ETH being restaked,
     * @dev Only callable by EigenPodManager.
     */
    function depositBeaconChainETH(address staker, uint256 amount) external;
    /**
     * @notice Records an overcommitment event on behalf of a staker. The staker's beaconChainETH shares are decremented by `amount`.
     * @param overcommittedPodOwner is the pod owner to be slashed
     * @param beaconChainETHStrategyIndex is the index of the beaconChainETHStrategy in case it must be removed,
     * @param amount is the amount to decrement the slashedAddress's beaconChainETHStrategy shares
     * @dev Only callable by EigenPodManager.
     */
    function recordOvercommittedBeaconChainETH(address overcommittedPodOwner, uint256 beaconChainETHStrategyIndex, uint256 amount)
        external;
    /**
     * @notice Used for depositing an asset into the specified strategy with the resultant shares credited to `staker`,
     * who must sign off on the action.
     * Note that the assets are transferred out/from the `msg.sender`, not from the `staker`; this function is explicitly designed 
     * purely to help one address deposit 'for' another.
     * @param strategy is the specified strategy where deposit is to be made,
     * @param token is the denomination in which the deposit is to be made,
     * @param amount is the amount of token to be deposited in the strategy by the depositor
     * @param staker the staker that the deposited assets will be credited to
     * @param expiry the timestamp at which the signature expires
     * @param signature is a valid signature from the `staker`. either an ECDSA signature if the `staker` is an EOA, or data to forward
     * following EIP-1271 if the `staker` is a contract
     * @return shares The amount of new shares in the `strategy` created as part of the action.
     * @dev The `msg.sender` must have previously approved this contract to transfer at least `amount` of `token` on their behalf.
     * @dev A signature is required for this function to eliminate the possibility of griefing attacks, specifically those
     * targeting stakers who may be attempting to undelegate.
     * @dev Cannot be called on behalf of a staker that is 'frozen' (this function will revert if the `staker` is frozen).
     * 
     *  WARNING: Depositing tokens that allow reentrancy (eg. ERC-777) into a strategy is not recommended.  This can lead to attack vectors
     *          where the token balance and corresponding strategy shares are not in sync upon reentrancy
     */
    function depositIntoStrategyWithSignature(
        IStrategy strategy,
        IERC20 token,
        uint256 amount,
        address staker,
        uint256 expiry,
        bytes memory signature
    )
        external
        returns (uint256 shares);
    /// @notice Returns the current shares of `user` in `strategy`
    function stakerStrategyShares(address user, IStrategy strategy) external view returns (uint256 shares);
    /**
     * @notice Get all details on the depositor's deposits and corresponding shares
     * @return (depositor's strategies, shares in these strategies)
     */
    function getDeposits(address depositor) external view returns (IStrategy[] memory, uint256[] memory);
    /// @notice Simple getter function that returns `stakerStrategyList[staker].length`.
    function stakerStrategyListLength(address staker) external view returns (uint256);
    /**
     * @notice Called by a staker to queue a withdrawal of the given amount of `shares` from each of the respective given `strategies`.
     * @dev Stakers will complete their withdrawal by calling the 'completeQueuedWithdrawal' function.
     * User shares are decreased in this function, but the total number of shares in each strategy remains the same.
     * The total number of shares is decremented in the 'completeQueuedWithdrawal' function instead, which is where
     * the funds are actually sent to the user through use of the strategies' 'withdrawal' function. This ensures
     * that the value per share reported by each strategy will remain consistent, and that the shares will continue
     * to accrue gains during the enforced withdrawal waiting period.
     * @param strategyIndexes is a list of the indices in `stakerStrategyList[msg.sender]` that correspond to the strategies
     * for which `msg.sender` is withdrawing 100% of their shares
     * @param strategies The Strategies to withdraw from
     * @param shares The amount of shares to withdraw from each of the respective Strategies in the `strategies` array
     * @param withdrawer The address that can complete the withdrawal and will receive any withdrawn funds or shares upon completing the withdrawal
     * @param undelegateIfPossible If this param is marked as 'true' *and the withdrawal will result in `msg.sender` having no shares in any Strategy,*
     * then this function will also make an internal call to `undelegate(msg.sender)` to undelegate the `msg.sender`.
     * @return The 'withdrawalRoot' of the newly created Queued Withdrawal
     * @dev Strategies are removed from `stakerStrategyList` by swapping the last entry with the entry to be removed, then
     * popping off the last entry in `stakerStrategyList`. The simplest way to calculate the correct `strategyIndexes` to input
     * is to order the strategies *for which `msg.sender` is withdrawing 100% of their shares* from highest index in
     * `stakerStrategyList` to lowest index
     * @dev Note that if the withdrawal includes shares in the enshrined 'beaconChainETH' strategy, then it must *only* include shares in this strategy, and
     * `withdrawer` must match the caller's address. The first condition is because slashing of queued withdrawals cannot be guaranteed 
     * for Beacon Chain ETH (since we cannot trigger a withdrawal from the beacon chain through a smart contract) and the second condition is because shares in
     * the enshrined 'beaconChainETH' strategy technically represent non-fungible positions (deposits to the Beacon Chain, each pointed at a specific EigenPod).
     */
    function queueWithdrawal(
        uint256[] calldata strategyIndexes,
        IStrategy[] calldata strategies,
        uint256[] calldata shares,
        address withdrawer,
        bool undelegateIfPossible
    )
        external returns(bytes32);
        
    /**
     * @notice Used to complete the specified `queuedWithdrawal`. The function caller must match `queuedWithdrawal.withdrawer`
     * @param queuedWithdrawal The QueuedWithdrawal to complete.
     * @param tokens Array in which the i-th entry specifies the `token` input to the 'withdraw' function of the i-th Strategy in the `strategies` array
     * of the `queuedWithdrawal`. This input can be provided with zero length if `receiveAsTokens` is set to 'false' (since in that case, this input will be unused)
     * @param middlewareTimesIndex is the index in the operator that the staker who triggered the withdrawal was delegated to's middleware times array
     * @param receiveAsTokens If true, the shares specified in the queued withdrawal will be withdrawn from the specified strategies themselves
     * and sent to the caller, through calls to `queuedWithdrawal.strategies[i].withdraw`. If false, then the shares in the specified strategies
     * will simply be transferred to the caller directly.
     * @dev middlewareTimesIndex should be calculated off chain before calling this function by finding the first index that satisfies `slasher.canWithdraw`
     */
    function completeQueuedWithdrawal(
        QueuedWithdrawal calldata queuedWithdrawal,
        IERC20[] calldata tokens,
        uint256 middlewareTimesIndex,
        bool receiveAsTokens
    )
        external;
    
    /**
     * @notice Used to complete the specified `queuedWithdrawals`. The function caller must match `queuedWithdrawals[...].withdrawer`
     * @param queuedWithdrawals The QueuedWithdrawals to complete.
     * @param tokens Array of tokens for each QueuedWithdrawal. See `completeQueuedWithdrawal` for the usage of a single array.
     * @param middlewareTimesIndexes One index to reference per QueuedWithdrawal. See `completeQueuedWithdrawal` for the usage of a single index.
     * @param receiveAsTokens If true, the shares specified in the queued withdrawal will be withdrawn from the specified strategies themselves
     * and sent to the caller, through calls to `queuedWithdrawal.strategies[i].withdraw`. If false, then the shares in the specified strategies
     * will simply be transferred to the caller directly.
     * @dev Array-ified version of `completeQueuedWithdrawal`
     * @dev middlewareTimesIndex should be calculated off chain before calling this function by finding the first index that satisfies `slasher.canWithdraw`
     */
    function completeQueuedWithdrawals(
        QueuedWithdrawal[] calldata queuedWithdrawals,
        IERC20[][] calldata tokens,
        uint256[] calldata middlewareTimesIndexes,
        bool[] calldata receiveAsTokens
    )
        external;
    /**
     * @notice Slashes the shares of a 'frozen' operator (or a staker delegated to one)
     * @param slashedAddress is the frozen address that is having its shares slashed
     * @param recipient is the address that will receive the slashed funds, which could e.g. be a harmed party themself,
     * or a MerkleDistributor-type contract that further sub-divides the slashed funds.
     * @param strategies Strategies to slash
     * @param shareAmounts The amount of shares to slash in each of the provided `strategies`
     * @param tokens The tokens to use as input to the `withdraw` function of each of the provided `strategies`
     * @param strategyIndexes is a list of the indices in `stakerStrategyList[msg.sender]` that correspond to the strategies
     * for which `msg.sender` is withdrawing 100% of their shares
     * @param recipient The slashed funds are withdrawn as tokens to this address.
     * @dev strategies are removed from `stakerStrategyList` by swapping the last entry with the entry to be removed, then
     * popping off the last entry in `stakerStrategyList`. The simplest way to calculate the correct `strategyIndexes` to input
     * is to order the strategies *for which `msg.sender` is withdrawing 100% of their shares* from highest index in
     * `stakerStrategyList` to lowest index
     */
    function slashShares(
        address slashedAddress,
        address recipient,
        IStrategy[] calldata strategies,
        IERC20[] calldata tokens,
        uint256[] calldata strategyIndexes,
        uint256[] calldata shareAmounts
    )
        external;
    /**
     * @notice Slashes an existing queued withdrawal that was created by a 'frozen' operator (or a staker delegated to one)
     * @param recipient The funds in the slashed withdrawal are withdrawn as tokens to this address.
     * @param queuedWithdrawal The previously queued withdrawal to be slashed
     * @param tokens Array in which the i-th entry specifies the `token` input to the 'withdraw' function of the i-th Strategy in the `strategies`
     * array of the `queuedWithdrawal`.
     * @param indicesToSkip Optional input parameter -- indices in the `strategies` array to skip (i.e. not call the 'withdraw' function on). This input exists
     * so that, e.g., if the slashed QueuedWithdrawal contains a malicious strategy in the `strategies` array which always reverts on calls to its 'withdraw' function,
     * then the malicious strategy can be skipped (with the shares in effect "burned"), while the non-malicious strategies are still called as normal.
     */
    function slashQueuedWithdrawal(address recipient, QueuedWithdrawal calldata queuedWithdrawal, IERC20[] calldata tokens, uint256[] calldata indicesToSkip)
        external;
    /// @notice Returns the keccak256 hash of `queuedWithdrawal`.
    function calculateWithdrawalRoot(
        QueuedWithdrawal memory queuedWithdrawal
    )
        external
        pure
        returns (bytes32);
    /**
     * @notice Owner-only function that adds the provided Strategies to the 'whitelist' of strategies that stakers can deposit into
     * @param strategiesToWhitelist Strategies that will be added to the `strategyIsWhitelistedForDeposit` mapping (if they aren't in it already)
    */
    function addStrategiesToDepositWhitelist(IStrategy[] calldata strategiesToWhitelist) external;
    /**
     * @notice Owner-only function that removes the provided Strategies from the 'whitelist' of strategies that stakers can deposit into
     * @param strategiesToRemoveFromWhitelist Strategies that will be removed to the `strategyIsWhitelistedForDeposit` mapping (if they are in it)
    */
    function removeStrategiesFromDepositWhitelist(IStrategy[] calldata strategiesToRemoveFromWhitelist) external;
    /// @notice Returns the single, central Delegation contract of EigenLayer
    function delegation() external view returns (IDelegationManager);
    /// @notice Returns the single, central Slasher contract of EigenLayer
    function slasher() external view returns (ISlasher);
    /// @notice returns the enshrined, virtual 'beaconChainETH' Strategy
    function beaconChainETHStrategy() external view returns (IStrategy);
    /// @notice Returns the number of blocks that must pass between the time a withdrawal is queued and the time it can be completed
    function withdrawalDelayBlocks() external view returns (uint256);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Interface for the BeaconStateOracle contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface IBeaconChainOracle {
    /// @notice Largest blockNumber that has been confirmed by the oracle.
    function latestConfirmedOracleBlockNumber() external view returns(uint64);
    /// @notice Mapping: Beacon Chain blockNumber => the Beacon Chain state root at the specified blockNumber.
    /// @dev This will return `bytes32(0)` if the state root at the specified blockNumber is not yet confirmed.
    function beaconStateRootAtBlockNumber(uint64 blockNumber) external view returns(bytes32);
    /// @notice Mapping: address => whether or not the address is in the set of oracle signers.
    function isOracleSigner(address _oracleSigner) external view returns(bool);
    /// @notice Mapping: Beacon Chain blockNumber => oracle signer address => whether or not the oracle signer has voted on the state root at the blockNumber.
    function hasVoted(uint64 blockNumber, address oracleSigner) external view returns(bool);
    /// @notice Mapping: Beacon Chain blockNumber => state root => total number of oracle signer votes for the state root at the blockNumber. 
    function stateRootVotes(uint64 blockNumber, bytes32 stateRoot) external view returns(uint256);
    /// @notice Total number of members of the set of oracle signers.
    function totalOracleSigners() external view returns(uint256);
    /**
     * @notice Number of oracle signers that must vote for a state root in order for the state root to be confirmed.
     * Adjustable by this contract's owner through use of the `setThreshold` function.
     * @dev We note that there is an edge case -- when the threshold is adjusted downward, if a state root already has enough votes to meet the *new* threshold,
     * the state root must still receive one additional vote from an oracle signer to be confirmed. This behavior is intended, to minimize unexpected root confirmations.
     */
    function threshold() external view returns(uint256);
    /**
     * @notice Owner-only function used to modify the value of the `threshold` variable.
     * @param _threshold Desired new value for the `threshold` variable. Function will revert if this is set to zero.
     */
    function setThreshold(uint256 _threshold) external;
    /**
     * @notice Owner-only function used to add a signer to the set of oracle signers.
     * @param _oracleSigners Array of address to be added to the set.
     * @dev Function will have no effect on the i-th input address if `_oracleSigners[i]`is already in the set of oracle signers.
     */
    function addOracleSigners(address[] memory _oracleSigners) external;
    /**
     * @notice Owner-only function used to remove a signer from the set of oracle signers.
     * @param _oracleSigners Array of address to be removed from the set.
     * @dev Function will have no effect on the i-th input address if `_oracleSigners[i]`is already not in the set of oracle signers.
     */
    function removeOracleSigners(address[] memory _oracleSigners) external;
    /**
     * @notice Called by a member of the set of oracle signers to assert that the Beacon Chain state root is `stateRoot` at `blockNumber`.
     * @dev The state root will be finalized once the total number of votes *for this exact state root at this exact blockNumber* meets the `threshold` value.
     * @param blockNumber The Beacon Chain blockNumber of interest.
     * @param stateRoot The Beacon Chain state root that the caller asserts was the correct root, at the specified `blockNumber`.
     */
    function voteForBeaconChainStateRoot(uint64 blockNumber, bytes32 stateRoot) external;
}// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Interface for the `PauserRegistry` contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface IPauserRegistry {
    /// @notice Mapping of addresses to whether they hold the pauser role.
    function isPauser(address pauser) external view returns (bool);
    /// @notice Unique address that holds the unpauser role. Capable of changing *both* the pauser and unpauser addresses.
    function unpauser() external view returns (address);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/**
 * @title Minimal interface for an `Strategy` contract.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice Custom `Strategy` implementations may expand extensively on this interface.
 */
interface IStrategy {
    /**
     * @notice Used to deposit tokens into this Strategy
     * @param token is the ERC20 token being deposited
     * @param amount is the amount of token being deposited
     * @dev This function is only callable by the strategyManager contract. It is invoked inside of the strategyManager's
     * `depositIntoStrategy` function, and individual share balances are recorded in the strategyManager as well.
     * @return newShares is the number of new shares issued at the current exchange ratio.
     */
    function deposit(IERC20 token, uint256 amount) external returns (uint256);
    /**
     * @notice Used to withdraw tokens from this Strategy, to the `depositor`'s address
     * @param depositor is the address to receive the withdrawn funds
     * @param token is the ERC20 token being transferred out
     * @param amountShares is the amount of shares being withdrawn
     * @dev This function is only callable by the strategyManager contract. It is invoked inside of the strategyManager's
     * other functions, and individual share balances are recorded in the strategyManager as well.
     */
    function withdraw(address depositor, IERC20 token, uint256 amountShares) external;
    /**
     * @notice Used to convert a number of shares to the equivalent amount of underlying tokens for this strategy.
     * @notice In contrast to `sharesToUnderlyingView`, this function **may** make state modifications
     * @param amountShares is the amount of shares to calculate its conversion into the underlying token
     * @return The amount of underlying tokens corresponding to the input `amountShares`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function sharesToUnderlying(uint256 amountShares) external returns (uint256);
    /**
     * @notice Used to convert an amount of underlying tokens to the equivalent amount of shares in this strategy.
     * @notice In contrast to `underlyingToSharesView`, this function **may** make state modifications
     * @param amountUnderlying is the amount of `underlyingToken` to calculate its conversion into strategy shares
     * @return The amount of underlying tokens corresponding to the input `amountShares`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function underlyingToShares(uint256 amountUnderlying) external returns (uint256);
    /**
     * @notice convenience function for fetching the current underlying value of all of the `user`'s shares in
     * this strategy. In contrast to `userUnderlyingView`, this function **may** make state modifications
     */
    function userUnderlying(address user) external returns (uint256);
     /**
     * @notice Used to convert a number of shares to the equivalent amount of underlying tokens for this strategy.
     * @notice In contrast to `sharesToUnderlying`, this function guarantees no state modifications
     * @param amountShares is the amount of shares to calculate its conversion into the underlying token
     * @return The amount of shares corresponding to the input `amountUnderlying`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function sharesToUnderlyingView(uint256 amountShares) external view returns (uint256);
    /**
     * @notice Used to convert an amount of underlying tokens to the equivalent amount of shares in this strategy.
     * @notice In contrast to `underlyingToShares`, this function guarantees no state modifications
     * @param amountUnderlying is the amount of `underlyingToken` to calculate its conversion into strategy shares
     * @return The amount of shares corresponding to the input `amountUnderlying`
     * @dev Implementation for these functions in particular may vary significantly for different strategies
     */
    function underlyingToSharesView(uint256 amountUnderlying) external view returns (uint256);
    /**
     * @notice convenience function for fetching the current underlying value of all of the `user`'s shares in
     * this strategy. In contrast to `userUnderlying`, this function guarantees no state modifications
     */
    function userUnderlyingView(address user) external view returns (uint256);
    /// @notice The underlying token for shares in this Strategy
    function underlyingToken() external view returns (IERC20);
    /// @notice The total number of extant shares in this Strategy
    function totalShares() external view returns (uint256);
    /// @notice Returns either a brief string explaining the strategy's goal & purpose, or a link to metadata that explains in more detail.
    function explanation() external view returns (string memory);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
/**
 * @title Interface for the primary 'slashing' contract for EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice See the `Slasher` contract itself for implementation details.
 */
interface ISlasher {
    // struct used to store information about the current state of an operator's obligations to middlewares they are serving
    struct MiddlewareTimes {
        // The update block for the middleware whose most recent update was earliest, i.e. the 'stalest' update out of all middlewares the operator is serving
        uint32 stalestUpdateBlock;
        // The latest 'serveUntilBlock' from all of the middleware that the operator is serving
        uint32 latestServeUntilBlock;
    }
    // struct used to store details relevant to a single middleware that an operator has opted-in to serving
    struct MiddlewareDetails {
        // the block before which the contract is allowed to slash the user
        uint32 contractCanSlashOperatorUntilBlock;
        // the block at which the middleware's view of the operator's stake was most recently updated
        uint32 latestUpdateBlock;
    }
    /**
     * @notice Gives the `contractAddress` permission to slash the funds of the caller.
     * @dev Typically, this function must be called prior to registering for a middleware.
     */
    function optIntoSlashing(address contractAddress) external;
    /**
     * @notice Used for 'slashing' a certain operator.
     * @param toBeFrozen The operator to be frozen.
     * @dev Technically the operator is 'frozen' (hence the name of this function), and then subject to slashing pending a decision by a human-in-the-loop.
     * @dev The operator must have previously given the caller (which should be a contract) the ability to slash them, through a call to `optIntoSlashing`.
     */
    function freezeOperator(address toBeFrozen) external;
    
    /**
     * @notice Removes the 'frozen' status from each of the `frozenAddresses`
     * @dev Callable only by the contract owner (i.e. governance).
     */
    function resetFrozenStatus(address[] calldata frozenAddresses) external;
    /**
     * @notice this function is a called by middlewares during an operator's registration to make sure the operator's stake at registration 
     *         is slashable until serveUntil
     * @param operator the operator whose stake update is being recorded
     * @param serveUntilBlock the block until which the operator's stake at the current block is slashable
     * @dev adds the middleware's slashing contract to the operator's linked list
     */
    function recordFirstStakeUpdate(address operator, uint32 serveUntilBlock) external;
    /**
     * @notice this function is a called by middlewares during a stake update for an operator (perhaps to free pending withdrawals)
     *         to make sure the operator's stake at updateBlock is slashable until serveUntil
     * @param operator the operator whose stake update is being recorded
     * @param updateBlock the block for which the stake update is being recorded
     * @param serveUntilBlock the block until which the operator's stake at updateBlock is slashable
     * @param insertAfter the element of the operators linked list that the currently updating middleware should be inserted after
     * @dev insertAfter should be calculated offchain before making the transaction that calls this. this is subject to race conditions, 
     *      but it is anticipated to be rare and not detrimental.
     */
    function recordStakeUpdate(address operator, uint32 updateBlock, uint32 serveUntilBlock, uint256 insertAfter) external;
    /**
     * @notice this function is a called by middlewares during an operator's deregistration to make sure the operator's stake at deregistration 
     *         is slashable until serveUntil
     * @param operator the operator whose stake update is being recorded
     * @param serveUntilBlock the block until which the operator's stake at the current block is slashable
     * @dev removes the middleware's slashing contract to the operator's linked list and revokes the middleware's (i.e. caller's) ability to
     * slash `operator` once `serveUntil` is reached
     */
    function recordLastStakeUpdateAndRevokeSlashingAbility(address operator, uint32 serveUntilBlock) external;
    /**
     * @notice Used to determine whether `staker` is actively 'frozen'. If a staker is frozen, then they are potentially subject to
     * slashing of their funds, and cannot cannot deposit or withdraw from the strategyManager until the slashing process is completed
     * and the staker's status is reset (to 'unfrozen').
     * @param staker The staker of interest.
     * @return Returns 'true' if `staker` themselves has their status set to frozen, OR if the staker is delegated
     * to an operator who has their status set to frozen. Otherwise returns 'false'.
     */
    function isFrozen(address staker) external view returns (bool);
    /// @notice Returns true if `slashingContract` is currently allowed to slash `toBeSlashed`.
    function canSlash(address toBeSlashed, address slashingContract) external view returns (bool);
    /// @notice Returns the block until which `serviceContract` is allowed to slash the `operator`.
    function contractCanSlashOperatorUntilBlock(address operator, address serviceContract) external view returns (uint32);
    /// @notice Returns the block at which the `serviceContract` last updated its view of the `operator`'s stake
    function latestUpdateBlock(address operator, address serviceContract) external view returns (uint32);
    /// @notice A search routine for finding the correct input value of `insertAfter` to `recordStakeUpdate` / `_updateMiddlewareList`.
    function getCorrectValueForInsertAfter(address operator, uint32 updateBlock) external view returns (uint256);
    /**
     * @notice Returns 'true' if `operator` can currently complete a withdrawal started at the `withdrawalStartBlock`, with `middlewareTimesIndex` used
     * to specify the index of a `MiddlewareTimes` struct in the operator's list (i.e. an index in `operatorToMiddlewareTimes[operator]`). The specified
     * struct is consulted as proof of the `operator`'s ability (or lack thereof) to complete the withdrawal.
     * This function will return 'false' if the operator cannot currently complete a withdrawal started at the `withdrawalStartBlock`, *or* in the event
     * that an incorrect `middlewareTimesIndex` is supplied, even if one or more correct inputs exist.
     * @param operator Either the operator who queued the withdrawal themselves, or if the withdrawing party is a staker who delegated to an operator,
     * this address is the operator *who the staker was delegated to* at the time of the `withdrawalStartBlock`.
     * @param withdrawalStartBlock The block number at which the withdrawal was initiated.
     * @param middlewareTimesIndex Indicates an index in `operatorToMiddlewareTimes[operator]` to consult as proof of the `operator`'s ability to withdraw
     * @dev The correct `middlewareTimesIndex` input should be computable off-chain.
     */
    function canWithdraw(address operator, uint32 withdrawalStartBlock, uint256 middlewareTimesIndex) external returns(bool);
    /**
     * operator => 
     *  [
     *      (
     *          the least recent update block of all of the middlewares it's serving/served, 
     *          latest time that the stake bonded at that update needed to serve until
     *      )
     *  ]
     */
    function operatorToMiddlewareTimes(address operator, uint256 arrayIndex) external view returns (MiddlewareTimes memory);
    /// @notice Getter function for fetching `operatorToMiddlewareTimes[operator].length`
    function middlewareTimesLength(address operator) external view returns (uint256);
    /// @notice Getter function for fetching `operatorToMiddlewareTimes[operator][index].stalestUpdateBlock`.
    function getMiddlewareTimesIndexBlock(address operator, uint32 index) external view returns(uint32);
    /// @notice Getter function for fetching `operatorToMiddlewareTimes[operator][index].latestServeUntil`.
    function getMiddlewareTimesIndexServeUntilBlock(address operator, uint32 index) external view returns(uint32);
    /// @notice Getter function for fetching `_operatorToWhitelistedContractsByUpdate[operator].size`.
    function operatorWhitelistedContractsLinkedListSize(address operator) external view returns (uint256);
    /// @notice Getter function for fetching a single node in the operator's linked list (`_operatorToWhitelistedContractsByUpdate[operator]`).
    function operatorWhitelistedContractsLinkedListEntry(address operator, address node) external view returns (bool, uint256, uint256);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IDelegationTerms.sol";
/**
 * @title The interface for the primary delegation contract for EigenLayer.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice  This is the contract for delegation in EigenLayer. The main functionalities of this contract are
 * - enabling anyone to register as an operator in EigenLayer
 * - allowing new operators to provide a DelegationTerms-type contract, which may mediate their interactions with stakers who delegate to them
 * - enabling any staker to delegate its stake to the operator of its choice
 * - enabling a staker to undelegate its assets from an operator (performed as part of the withdrawal process, initiated through the StrategyManager)
 */
interface IDelegationManager {
    /**
     * @notice This will be called by an operator to register itself as an operator that stakers can choose to delegate to.
     * @param dt is the `DelegationTerms` contract that the operator has for those who delegate to them.
     * @dev An operator can set `dt` equal to their own address (or another EOA address), in the event that they want to split payments
     * in a more 'trustful' manner.
     * @dev In the present design, once set, there is no way for an operator to ever modify the address of their DelegationTerms contract.
     */
    function registerAsOperator(IDelegationTerms dt) external;
    /**
     *  @notice This will be called by a staker to delegate its assets to some operator.
     *  @param operator is the operator to whom staker (msg.sender) is delegating its assets
     */
    function delegateTo(address operator) external;
    /**
     * @notice Delegates from `staker` to `operator`.
     * @dev requires that:
     * 1) if `staker` is an EOA, then `signature` is valid ECDSA signature from `staker`, indicating their intention for this action
     * 2) if `staker` is a contract, then `signature` must will be checked according to EIP-1271
     */
    function delegateToBySignature(address staker, address operator, uint256 expiry, bytes memory signature) external;
    /**
     * @notice Undelegates `staker` from the operator who they are delegated to.
     * @notice Callable only by the StrategyManager
     * @dev Should only ever be called in the event that the `staker` has no active deposits in EigenLayer.
     */
    function undelegate(address staker) external;
    /// @notice returns the address of the operator that `staker` is delegated to.
    function delegatedTo(address staker) external view returns (address);
    /// @notice returns the DelegationTerms of the `operator`, which may mediate their interactions with stakers who delegate to them.
    function delegationTerms(address operator) external view returns (IDelegationTerms);
    /// @notice returns the total number of shares in `strategy` that are delegated to `operator`.
    function operatorShares(address operator, IStrategy strategy) external view returns (uint256);
    /**
     * @notice Increases the `staker`'s delegated shares in `strategy` by `shares, typically called when the staker has further deposits into EigenLayer
     * @dev Callable only by the StrategyManager
     */
    function increaseDelegatedShares(address staker, IStrategy strategy, uint256 shares) external;
    /**
     * @notice Decreases the `staker`'s delegated shares in each entry of `strategies` by its respective `shares[i]`, typically called when the staker withdraws from EigenLayer
     * @dev Callable only by the StrategyManager
     */
    function decreaseDelegatedShares(
        address staker,
        IStrategy[] calldata strategies,
        uint256[] calldata shares
    ) external;
    /// @notice Returns 'true' if `staker` *is* actively delegated, and 'false' otherwise.
    function isDelegated(address staker) external view returns (bool);
    /// @notice Returns 'true' if `staker` is *not* actively delegated, and 'false' otherwise.
    function isNotDelegated(address staker) external view returns (bool);
    /// @notice Returns if an operator can be delegated to, i.e. it has called `registerAsOperator`.
    function isOperator(address operator) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);
    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);
    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);
    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);
    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);
    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);
    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}
// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.8.12;
import "./IStrategy.sol";
/**
 * @title Abstract interface for a contract that helps structure the delegation relationship.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 * @notice The gas budget provided to this contract in calls from EigenLayer contracts is limited.
 */
interface IDelegationTerms {
    function payForService(IERC20 token, uint256 amount) external payable;
    function onDelegationWithdrawn(
        address delegator,
        IStrategy[] memory stakerStrategyList,
        uint256[] memory stakerShares
    ) external returns(bytes memory);
    function onDelegationReceived(
        address delegator,
        IStrategy[] memory stakerStrategyList,
        uint256[] memory stakerShares
    ) external returns(bytes memory);
}