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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/proxy/beacon/BeaconProxy.sol";
import "@openzeppelin/contracts/utils/Create2.sol";

import "./IRestakerDeployer.sol";
import "./IRestaker.sol";
import "./IRestakerFacets.sol";

/**
 * @title create2 deployer of {Restaker}
 * @author GenesisLRT
 * @notice Not upgradeable contracts makes possible to everyone deploy new instance of Restaker.
 */
contract RestakerDeployer is IRestakerDeployer {
    bytes public constant BEACON_PROXY_BYTECODE =
        type(BeaconProxy).creationCode;

    address public immutable beacon;

    IRestakerFacets public immutable facets;

    uint256 public nonce;

    constructor(address beacon_, IRestakerFacets facets_) {
        beacon = beacon_;
        facets = facets_;
    }

    function deployRestaker() external override returns (IRestaker restaker) {
        address creator = msg.sender;
        restaker = IRestaker(
            Create2.deploy(0, bytes32(nonce), _getPreparedBytecode())
        );
        restaker.initialize(creator, facets);
        emit RestakerDeployed(creator, restaker, nonce++);
        return restaker;
    }

    /*******************************************************************************
                        VIEW FUNCTIONS
    *******************************************************************************/

    function getRestaker(uint256 id) external view override returns (address) {
        return
            Create2.computeAddress(
                bytes32(id),
                keccak256(_getPreparedBytecode())
            );
    }

    function _getPreparedBytecode() internal view returns (bytes memory) {
        return abi.encodePacked(BEACON_PROXY_BYTECODE, abi.encode(beacon, ""));
    }
}

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        StorageSlot.getAddressSlot(BEACON_SLOT).value = newBeacon;

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

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

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

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

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

pragma solidity ^0.8.20;

/**
 * @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 {
        _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();
    }
}

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

pragma solidity ^0.8.20;

import {IBeacon} from "./IBeacon.sol";
import {Proxy} from "../Proxy.sol";
import {ERC1967Utils} from "../ERC1967/ERC1967Utils.sol";

/**
 * @dev This contract implements a proxy that gets the implementation address for each call from an {UpgradeableBeacon}.
 *
 * The beacon address can only be set once during construction, and cannot be changed afterwards. It is stored in an
 * immutable variable to avoid unnecessary storage reads, and also in the beacon storage slot specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] so that it can be accessed externally.
 *
 * CAUTION: Since the beacon address can never be changed, you must ensure that you either control the beacon, or trust
 * the beacon to not upgrade the implementation maliciously.
 *
 * IMPORTANT: Do not use the implementation logic to modify the beacon storage slot. Doing so would leave the proxy in
 * an inconsistent state where the beacon storage slot does not match the beacon address.
 */
contract BeaconProxy is Proxy {
    // An immutable address for the beacon to avoid unnecessary SLOADs before each delegate call.
    address private immutable _beacon;

    /**
     * @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}.
     * - If `data` is empty, `msg.value` must be zero.
     */
    constructor(address beacon, bytes memory data) payable {
        ERC1967Utils.upgradeBeaconToAndCall(beacon, data);
        _beacon = beacon;
    }

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

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

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

pragma solidity ^0.8.20;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

pragma solidity ^0.8.20;

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

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

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Create2.sol)

pragma solidity ^0.8.20;

/**
 * @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 Not enough balance for performing a CREATE2 deploy.
     */
    error Create2InsufficientBalance(uint256 balance, uint256 needed);

    /**
     * @dev There's no code to deploy.
     */
    error Create2EmptyBytecode();

    /**
     * @dev The deployment failed.
     */
    error Create2FailedDeployment();

    /**
     * @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 addr) {
        if (address(this).balance < amount) {
            revert Create2InsufficientBalance(address(this).balance, amount);
        }
        if (bytecode.length == 0) {
            revert Create2EmptyBytecode();
        }
        /// @solidity memory-safe-assembly
        assembly {
            addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt)
        }
        if (addr == address(0)) {
            revert Create2FailedDeployment();
        }
    }

    /**
     * @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 addr) {
        /// @solidity memory-safe-assembly
        assembly {
            let ptr := mload(0x40) // Get free memory pointer

            // |                   | ↓ ptr ...  ↓ ptr + 0x0B (start) ...  ↓ ptr + 0x20 ...  ↓ ptr + 0x40 ...   |
            // |-------------------|---------------------------------------------------------------------------|
            // | bytecodeHash      |                                                        CCCCCCCCCCCCC...CC |
            // | salt              |                                      BBBBBBBBBBBBB...BB                   |
            // | deployer          | 000000...0000AAAAAAAAAAAAAAAAAAA...AA                                     |
            // | 0xFF              |            FF                                                             |
            // |-------------------|---------------------------------------------------------------------------|
            // | memory            | 000000...00FFAAAAAAAAAAAAAAAAAAA...AABBBBBBBBBBBBB...BBCCCCCCCCCCCCC...CC |
            // | keccak(start, 85) |            ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ |

            mstore(add(ptr, 0x40), bytecodeHash)
            mstore(add(ptr, 0x20), salt)
            mstore(ptr, deployer) // Right-aligned with 12 preceding garbage bytes
            let start := add(ptr, 0x0b) // The hashed data starts at the final garbage byte which we will set to 0xff
            mstore8(start, 0xff)
            addr := keccak256(start, 85)
        }
    }
}

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

pragma solidity ^0.8.20;

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

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    struct StringSlot {
        string value;
    }

    struct BytesSlot {
        bytes value;
    }

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;

/**
 * @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 The block number to state root mapping.
    function timestampToBlockRoot(
        uint256 timestamp
    ) external view returns (bytes32);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;

import "./IStrategy.sol";
import "./ISignatureUtils.sol";
import "./IStakeRegistryStub.sol";
import "./IStrategyManager.sol";

/**
 * @title DelegationManager
 * @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 operators to specify parameters related to stakers who delegate to them
 * - enabling any staker to delegate its stake to the operator of its choice (a given staker can only delegate to a single operator at a time)
 * - enabling a staker to undelegate its assets from the operator it is delegated to (performed as part of the withdrawal process, initiated through the StrategyManager)
 */
interface IDelegationManager is ISignatureUtils {
    // @notice Struct used for storing information about a single operator who has registered with EigenLayer
    struct OperatorDetails {
        // @notice address to receive the rewards that the operator earns via serving applications built on EigenLayer.
        address earningsReceiver;
        /**
         * @notice Address to verify signatures when a staker wishes to delegate to the operator, as well as controlling "forced undelegations".
         * @dev Signature verification follows these rules:
         * 1) If this address is left as address(0), then any staker will be free to delegate to the operator, i.e. no signature verification will be performed.
         * 2) If this address is an EOA (i.e. it has no code), then we follow standard ECDSA signature verification for delegations to the operator.
         * 3) If this address is a contract (i.e. it has code) then we forward a call to the contract and verify that it returns the correct EIP-1271 "magic value".
         */
        address delegationApprover;
        /**
         * @notice A minimum delay -- measured in blocks -- enforced between:
         * 1) the operator signalling their intent to register for a service, via calling `Slasher.optIntoSlashing`
         * and
         * 2) the operator completing registration for the service, via the service ultimately calling `Slasher.recordFirstStakeUpdate`
         * @dev note that for a specific operator, this value *cannot decrease*, i.e. if the operator wishes to modify their OperatorDetails,
         * then they are only allowed to either increase this value or keep it the same.
         */
        uint32 stakerOptOutWindowBlocks;
    }

    /**
     * @notice Abstract struct used in calculating an EIP712 signature for a staker to approve that they (the staker themselves) delegate to a specific operator.
     * @dev Used in computing the `STAKER_DELEGATION_TYPEHASH` and as a reference in the computation of the stakerDigestHash in the `delegateToBySignature` function.
     */
    struct StakerDelegation {
        // the staker who is delegating
        address staker;
        // the operator being delegated to
        address operator;
        // the staker's nonce
        uint256 nonce;
        // the expiration timestamp (UTC) of the signature
        uint256 expiry;
    }

    /**
     * @notice Abstract struct used in calculating an EIP712 signature for an operator's delegationApprover to approve that a specific staker delegate to the operator.
     * @dev Used in computing the `DELEGATION_APPROVAL_TYPEHASH` and as a reference in the computation of the approverDigestHash in the `_delegate` function.
     */
    struct DelegationApproval {
        // the staker who is delegating
        address staker;
        // the operator being delegated to
        address operator;
        // the operator's provided salt
        bytes32 salt;
        // the expiration timestamp (UTC) of the signature
        uint256 expiry;
    }

    /// @notice Emitted when the StakeRegistry is set
    event StakeRegistrySet(IStakeRegistryStub stakeRegistry);

    /**
     * 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. 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 Withdrawal {
        // The address that originated the Withdrawal
        address staker;
        // The address that the staker was delegated to at the time that the Withdrawal was created
        address delegatedTo;
        // The address that can complete the Withdrawal + will receive funds when completing the withdrawal
        address withdrawer;
        // Nonce used to guarantee that otherwise identical withdrawals have unique hashes
        uint256 nonce;
        // Block number when the Withdrawal was created
        uint32 startBlock;
        // Array of strategies that the Withdrawal contains
        IStrategy[] strategies;
        // Array containing the amount of shares in each Strategy in the `strategies` array
        uint256[] shares;
    }

    struct QueuedWithdrawalParams {
        // Array of strategies that the QueuedWithdrawal contains
        IStrategy[] strategies;
        // Array containing the amount of shares in each Strategy in the `strategies` array
        uint256[] shares;
        // The address of the withdrawer
        address withdrawer;
    }

    // @notice Emitted when a new operator registers in EigenLayer and provides their OperatorDetails.
    event OperatorRegistered(
        address indexed operator,
        OperatorDetails operatorDetails
    );

    /// @notice Emitted when an operator updates their OperatorDetails to @param newOperatorDetails
    event OperatorDetailsModified(
        address indexed operator,
        OperatorDetails newOperatorDetails
    );

    /**
     * @notice Emitted when @param operator indicates that they are updating their MetadataURI string
     * @dev Note that these strings are *never stored in storage* and are instead purely emitted in events for off-chain indexing
     */
    event OperatorMetadataURIUpdated(
        address indexed operator,
        string metadataURI
    );

    /// @notice Emitted whenever an operator's shares are increased for a given strategy. Note that shares is the delta in the operator's shares.
    event OperatorSharesIncreased(
        address indexed operator,
        address staker,
        IStrategy strategy,
        uint256 shares
    );

    /// @notice Emitted whenever an operator's shares are decreased for a given strategy. Note that shares is the delta in the operator's shares.
    event OperatorSharesDecreased(
        address indexed operator,
        address staker,
        IStrategy strategy,
        uint256 shares
    );

    /// @notice Emitted when @param staker delegates to @param operator.
    event StakerDelegated(address indexed staker, address indexed operator);

    /// @notice Emitted when @param staker undelegates from @param operator.
    event StakerUndelegated(address indexed staker, address indexed operator);

    /// @notice Emitted when @param staker is undelegated via a call not originating from the staker themself
    event StakerForceUndelegated(
        address indexed staker,
        address indexed operator
    );

    /**
     * @notice Emitted when a new withdrawal is queued.
     * @param withdrawalRoot Is the hash of the `withdrawal`.
     * @param withdrawal Is the withdrawal itself.
     */
    event WithdrawalQueued(bytes32 withdrawalRoot, Withdrawal withdrawal);

    /// @notice Emitted when a queued withdrawal is completed
    event WithdrawalCompleted(bytes32 withdrawalRoot);

    /// @notice Emitted when a queued withdrawal is *migrated* from the StrategyManager to the DelegationManager
    event WithdrawalMigrated(
        bytes32 oldWithdrawalRoot,
        bytes32 newWithdrawalRoot
    );

    /// @notice Emitted when the `withdrawalDelayBlocks` variable is modified from `previousValue` to `newValue`.
    event WithdrawalDelayBlocksSet(uint256 previousValue, uint256 newValue);

    /**
     * @notice Caller delegates their stake to an operator.
     * @param operator The account (`msg.sender`) is delegating its assets to for use in serving applications built on EigenLayer.
     * @param approverSignatureAndExpiry Verifies the operator approves of this delegation
     * @param approverSalt A unique single use value tied to an individual signature.
     * @dev The approverSignatureAndExpiry is used in the event that:
     *          1) the operator's `delegationApprover` address is set to a non-zero value.
     *                  AND
     *          2) neither the operator nor their `delegationApprover` is the `msg.sender`, since in the event that the operator
     *             or their delegationApprover is the `msg.sender`, then approval is assumed.
     * @dev In the event that `approverSignatureAndExpiry` is not checked, its content is ignored entirely; it's recommended to use an empty input
     * in this case to save on complexity + gas costs
     */
    function delegateTo(
        address operator,
        SignatureWithExpiry memory approverSignatureAndExpiry,
        bytes32 approverSalt
    ) external;

    /**
     * @notice Caller delegates a staker's stake to an operator with valid signatures from both parties.
     * @param staker The account delegating stake to an `operator` account
     * @param operator The account (`staker`) is delegating its assets to for use in serving applications built on EigenLayer.
     * @param stakerSignatureAndExpiry Signed data from the staker authorizing delegating stake to an operator
     * @param approverSignatureAndExpiry is a parameter that will be used for verifying that the operator approves of this delegation action in the event that:
     * @param approverSalt Is a salt used to help guarantee signature uniqueness. Each salt can only be used once by a given approver.
     *
     * @dev If `staker` is an EOA, then `stakerSignature` is verified to be a valid ECDSA stakerSignature from `staker`, indicating their intention for this action.
     * @dev If `staker` is a contract, then `stakerSignature` will be checked according to EIP-1271.
     * @dev the operator's `delegationApprover` address is set to a non-zero value.
     * @dev neither the operator nor their `delegationApprover` is the `msg.sender`, since in the event that the operator or their delegationApprover
     * is the `msg.sender`, then approval is assumed.
     * @dev This function will revert if the current `block.timestamp` is equal to or exceeds the expiry
     * @dev In the case that `approverSignatureAndExpiry` is not checked, its content is ignored entirely; it's recommended to use an empty input
     * in this case to save on complexity + gas costs
     */
    function delegateToBySignature(
        address staker,
        address operator,
        SignatureWithExpiry memory stakerSignatureAndExpiry,
        SignatureWithExpiry memory approverSignatureAndExpiry,
        bytes32 approverSalt
    ) external;

    /**
     * @notice Undelegates the staker from the operator who they are delegated to. Puts the staker into the "undelegation limbo" mode of the EigenPodManager
     * and queues a withdrawal of all of the staker's shares in the StrategyManager (to the staker), if necessary.
     * @param staker The account to be undelegated.
     * @return withdrawalRoot The root of the newly queued withdrawal, if a withdrawal was queued. Otherwise just bytes32(0).
     *
     * @dev Reverts if the `staker` is also an operator, since operators are not allowed to undelegate from themselves.
     * @dev Reverts if the caller is not the staker, nor the operator who the staker is delegated to, nor the operator's specified "delegationApprover"
     * @dev Reverts if the `staker` is already undelegated.
     */
    function undelegate(
        address staker
    ) external returns (bytes32 withdrawalRoot);

    /**
     * Allows a staker to withdraw some shares. Withdrawn shares/strategies are immediately removed
     * from the staker. If the staker is delegated, withdrawn shares/strategies are also removed from
     * their operator.
     *
     * All withdrawn shares/strategies are placed in a queue and can be fully withdrawn after a delay.
     */
    function queueWithdrawals(
        QueuedWithdrawalParams[] calldata queuedWithdrawalParams
    ) external returns (bytes32[] memory);

    /**
     * @notice Used to complete the specified `withdrawal`. The caller must match `withdrawal.withdrawer`
     * @param withdrawal The Withdrawal 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 `withdrawal.strategies` array.
     * 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 withdrawal will be withdrawn from the specified strategies themselves
     * and sent to the caller, through calls to `withdrawal.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`
     * @dev beaconChainETHStrategy shares are non-transferrable, so if `receiveAsTokens = false` and `withdrawal.withdrawer != withdrawal.staker`, note that
     * any beaconChainETHStrategy shares in the `withdrawal` will be _returned to the staker_, rather than transferred to the withdrawer, unlike shares in
     * any other strategies, which will be transferred to the withdrawer.
     */
    function completeQueuedWithdrawal(
        Withdrawal calldata withdrawal,
        IERC20[] calldata tokens,
        uint256 middlewareTimesIndex,
        bool receiveAsTokens
    ) external;

    /**
     * @notice Array-ified version of `completeQueuedWithdrawal`.
     * Used to complete the specified `withdrawals`. The function caller must match `withdrawals[...].withdrawer`
     * @param withdrawals The Withdrawals to complete.
     * @param tokens Array of tokens for each Withdrawal. See `completeQueuedWithdrawal` for the usage of a single array.
     * @param middlewareTimesIndexes One index to reference per Withdrawal. See `completeQueuedWithdrawal` for the usage of a single index.
     * @param receiveAsTokens Whether or not to complete each withdrawal as tokens. See `completeQueuedWithdrawal` for the usage of a single boolean.
     * @dev See `completeQueuedWithdrawal` for relevant dev tags
     */
    function completeQueuedWithdrawals(
        Withdrawal[] calldata withdrawals,
        IERC20[][] calldata tokens,
        uint256[] calldata middlewareTimesIndexes,
        bool[] calldata receiveAsTokens
    ) external;

    /// @notice the address of the StakeRegistry contract to call for stake updates when operator shares are changed
    function stakeRegistry() external view returns (IStakeRegistryStub);

    /**
     * @notice returns the address of the operator that `staker` is delegated to.
     * @notice Mapping: staker => operator whom the staker is currently delegated to.
     * @dev Note that returning address(0) indicates that the staker is not actively delegated to any operator.
     */
    function delegatedTo(address staker) external view returns (address);

    /**
     * @notice Returns the OperatorDetails struct associated with an `operator`.
     */
    function operatorDetails(
        address operator
    ) external view returns (OperatorDetails memory);

    /*
     * @notice Returns the earnings receiver address for an operator
     */
    function earningsReceiver(address operator) external view returns (address);

    /**
     * @notice Returns the delegationApprover account for an operator
     */
    function delegationApprover(
        address operator
    ) external view returns (address);

    /**
     * @notice Returns the stakerOptOutWindowBlocks for an operator
     */
    function stakerOptOutWindowBlocks(
        address operator
    ) external view returns (uint256);

    /**
     * @notice returns the total number of shares in `strategy` that are delegated to `operator`.
     * @notice Mapping: operator => strategy => total number of shares in the strategy delegated to the operator.
     * @dev By design, the following invariant should hold for each Strategy:
     * (operator's shares in delegation manager) = sum (shares above zero of all stakers delegated to operator)
     * = sum (delegateable shares of all stakers delegated to the operator)
     */
    function operatorShares(
        address operator,
        IStrategy strategy
    ) external view returns (uint256);

    /**
     * @notice Returns 'true' if `staker` *is* actively delegated, and 'false' otherwise.
     */
    function isDelegated(address staker) external view returns (bool);

    /**
     * @notice Returns true is an operator has previously registered for delegation.
     */
    function isOperator(address operator) external view returns (bool);

    /// @notice Mapping: staker => number of signed delegation nonces (used in `delegateToBySignature`) from the staker that the contract has already checked
    function stakerNonce(address staker) external view returns (uint256);

    /**
     * @notice Mapping: delegationApprover => 32-byte salt => whether or not the salt has already been used by the delegationApprover.
     * @dev Salts are used in the `delegateTo` and `delegateToBySignature` functions. Note that these functions only process the delegationApprover's
     * signature + the provided salt if the operator being delegated to has specified a nonzero address as their `delegationApprover`.
     */
    function delegationApproverSaltIsSpent(
        address _delegationApprover,
        bytes32 salt
    ) external view returns (bool);

    /**
     * @notice Calculates the digestHash for a `staker` to sign to delegate to an `operator`
     * @param staker The signing staker
     * @param operator The operator who is being delegated to
     * @param expiry The desired expiry time of the staker's signature
     */
    function calculateCurrentStakerDelegationDigestHash(
        address staker,
        address operator,
        uint256 expiry
    ) external view returns (bytes32);

    /**
     * @notice Calculates the digest hash to be signed and used in the `delegateToBySignature` function
     * @param staker The signing staker
     * @param _stakerNonce The nonce of the staker. In practice we use the staker's current nonce, stored at `stakerNonce[staker]`
     * @param operator The operator who is being delegated to
     * @param expiry The desired expiry time of the staker's signature
     */
    function calculateStakerDelegationDigestHash(
        address staker,
        uint256 _stakerNonce,
        address operator,
        uint256 expiry
    ) external view returns (bytes32);

    /**
     * @notice Calculates the digest hash to be signed by the operator's delegationApprove and used in the `delegateTo` and `delegateToBySignature` functions.
     * @param staker The account delegating their stake
     * @param operator The account receiving delegated stake
     * @param _delegationApprover the operator's `delegationApprover` who will be signing the delegationHash (in general)
     * @param approverSalt A unique and single use value associated with the approver signature.
     * @param expiry Time after which the approver's signature becomes invalid
     */
    function calculateDelegationApprovalDigestHash(
        address staker,
        address operator,
        address _delegationApprover,
        bytes32 approverSalt,
        uint256 expiry
    ) external view returns (bytes32);

    /// @notice The EIP-712 typehash for the contract's domain
    function DOMAIN_TYPEHASH() external view returns (bytes32);

    /// @notice The EIP-712 typehash for the StakerDelegation struct used by the contract
    function STAKER_DELEGATION_TYPEHASH() external view returns (bytes32);

    /// @notice The EIP-712 typehash for the DelegationApproval struct used by the contract
    function DELEGATION_APPROVAL_TYPEHASH() external view returns (bytes32);

    /**
     * @notice Getter function for the current EIP-712 domain separator for this contract.
     *
     * @dev The domain separator will change in the event of a fork that changes the ChainID.
     * @dev By introducing a domain separator the DApp developers are guaranteed that there can be no signature collision.
     * for more detailed information please read EIP-712.
     */
    function domainSeparator() external view returns (bytes32);

    /// @notice Mapping: staker => cumulative number of queued withdrawals they have ever initiated.
    /// @dev This only increments (doesn't decrement), and is used to help ensure that otherwise identical withdrawals have unique hashes.
    function cumulativeWithdrawalsQueued(
        address staker
    ) external view returns (uint256);

    /// @notice Returns the keccak256 hash of `withdrawal`.
    function calculateWithdrawalRoot(
        Withdrawal memory withdrawal
    ) external pure returns (bytes32);

    function migrateQueuedWithdrawals(
        IStrategyManager.DeprecatedStruct_QueuedWithdrawal[]
            memory withdrawalsToQueue
    ) external;
}

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// SPDX-License-Identifier: CC0-1.0

pragma solidity >=0.5.0;

// 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 >=0.5.0;

import "../libraries/BeaconChainProofs.sol";
import "./IEigenPodManager.sol";
import "./IBeaconChainOracle.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.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
        WITHDRAWN // withdrawn from the Beacon Chain
    }

    struct ValidatorInfo {
        // index of the validator in the beacon chain
        uint64 validatorIndex;
        // amount of beacon chain ETH restaked on EigenLayer in gwei
        uint64 restakedBalanceGwei;
        //timestamp of the validator's most recent balance update
        uint64 mostRecentBalanceUpdateTimestamp;
        // status of the validator
        VALIDATOR_STATUS status;
    }

    /**
     * @notice struct used to store amounts related to proven withdrawals in memory. Used to help
     * manage stack depth and optimize the number of external calls, when batching withdrawal operations.
     */
    struct VerifiedWithdrawal {
        // amount to send to a podOwner from a proven withdrawal
        uint256 amountToSendGwei;
        // difference in shares to be recorded in the eigenPodManager, as a result of the withdrawal
        int256 sharesDeltaGwei;
    }

    enum PARTIAL_WITHDRAWAL_CLAIM_STATUS {
        REDEEMED,
        PENDING,
        FAILED
    }

    /// @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's  balance is proven to be updated.  Here newValidatorBalanceGwei
    //  is the validator's balance that is credited on EigenLayer.
    event ValidatorBalanceUpdated(
        uint40 validatorIndex,
        uint64 balanceTimestamp,
        uint64 newValidatorBalanceGwei
    );

    /// @notice Emitted when an ETH validator is prove to have withdrawn from the beacon chain
    event FullWithdrawalRedeemed(
        uint40 validatorIndex,
        uint64 withdrawalTimestamp,
        address indexed recipient,
        uint64 withdrawalAmountGwei
    );

    /// @notice Emitted when a partial withdrawal claim is successfully redeemed
    event PartialWithdrawalRedeemed(
        uint40 validatorIndex,
        uint64 withdrawalTimestamp,
        address indexed recipient,
        uint64 partialWithdrawalAmountGwei
    );

    /// @notice Emitted when restaked beacon chain ETH is withdrawn from the eigenPod.
    event RestakedBeaconChainETHWithdrawn(
        address indexed recipient,
        uint256 amount
    );

    /// @notice Emitted when podOwner enables restaking
    event RestakingActivated(address indexed podOwner);

    /// @notice Emitted when ETH is received via the `receive` fallback
    event NonBeaconChainETHReceived(uint256 amountReceived);

    /// @notice Emitted when ETH that was previously received via the `receive` fallback is withdrawn
    event NonBeaconChainETHWithdrawn(
        address indexed recipient,
        uint256 amountWithdrawn
    );

    /// @notice The max amount of eth, in gwei, that can be restaked per validator
    function MAX_RESTAKED_BALANCE_GWEI_PER_VALIDATOR()
        external
        view
        returns (uint64);

    /// @notice the amount of execution layer ETH in this contract that is staked in EigenLayer (i.e. withdrawn from beaconchain but not EigenLayer),
    function withdrawableRestakedExecutionLayerGwei()
        external
        view
        returns (uint64);

    /// @notice any ETH deposited into the EigenPod contract via the `receive` fallback function
    function nonBeaconChainETHBalanceWei() external view returns (uint256);

    /// @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 The latest timestamp at which the pod owner withdrew the balance of the pod, via calling `withdrawBeforeRestaking`.
     * @dev This variable is only updated when the `withdrawBeforeRestaking` 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 timestamps after the stored `mostRecentWithdrawalTimestamp`.
     */
    function mostRecentWithdrawalTimestamp() external view returns (uint64);

    /// @notice Returns the validatorInfo struct for the provided pubkeyHash
    function validatorPubkeyHashToInfo(
        bytes32 validatorPubkeyHash
    ) external view returns (ValidatorInfo memory);

    ///@notice mapping that tracks proven withdrawals
    function provenWithdrawal(
        bytes32 validatorPubkeyHash,
        uint64 slot
    ) external view returns (bool);

    /// @notice This returns the status of a given validator
    function validatorStatus(
        bytes32 pubkeyHash
    ) external view returns (VALIDATOR_STATUS);

    /**
     * @notice This function verifies that the withdrawal credentials of validator(s) owned by the podOwner are pointed to
     * this contract. It also verifies the 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 oracleTimestamp is the Beacon Chain timestamp whose state root the `proof` will be proven against.
     * @param validatorIndices is the list of indices of the validators being proven, refer to consensus specs
     * @param withdrawalCredentialProofs is an array of proofs, where each proof proves each 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 verifyWithdrawalCredentials(
        uint64 oracleTimestamp,
        BeaconChainProofs.StateRootProof calldata stateRootProof,
        uint40[] calldata validatorIndices,
        bytes[] calldata withdrawalCredentialProofs,
        bytes32[][] calldata validatorFields
    ) external;

    /**
     * @notice This function records an update (either increase or decrease) in the pod's balance in the StrategyManager.  
               It also verifies a merkle proof of the validator's current beacon chain balance.  
     * @param oracleTimestamp The oracleTimestamp whose state root the `proof` will be proven against.
     *        Must be within `VERIFY_BALANCE_UPDATE_WINDOW_SECONDS` of the current block.
     * @param validatorIndices is the list of indices of the validators being proven, refer to consensus specs 
     * @param balanceUpdateProofs is the proof of the validator's balance and validatorFields in the balance tree and the balanceRoot to prove for
     *                                    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 verifyBalanceUpdates(
        uint64 oracleTimestamp,
        uint40[] calldata validatorIndices,
        BeaconChainProofs.StateRootProof calldata stateRootProof,
        BeaconChainProofs.BalanceUpdateProof[] calldata balanceUpdateProofs,
        bytes32[][] calldata validatorFields
    ) external;

    /**
     * @notice This function records full and partial withdrawals on behalf of one of the Ethereum validators for this EigenPod
     * @param oracleTimestamp is the timestamp of the oracle slot that the withdrawal is being proven against
     * @param withdrawalProofs is the information needed to check the veracity of the block numbers and withdrawals being proven
     * @param validatorFieldsProofs is the proof of the validator's fields' in the validator tree
     * @param withdrawalFields are the fields of the withdrawals being proven
     * @param validatorFields are the fields of the validators being proven
     */
    function verifyAndProcessWithdrawals(
        uint64 oracleTimestamp,
        BeaconChainProofs.StateRootProof calldata stateRootProof,
        BeaconChainProofs.WithdrawalProof[] calldata withdrawalProofs,
        bytes[] calldata validatorFieldsProofs,
        bytes32[][] calldata validatorFields,
        bytes32[][] calldata withdrawalFields
    ) external;

    /**
     * @notice Called by the pod owner to activate restaking by withdrawing
     * all existing ETH from the pod and preventing further withdrawals via
     * "withdrawBeforeRestaking()"
     */
    function activateRestaking() external;

    /// @notice Called by the pod owner to withdraw the balance of the pod when `hasRestaked` is set to false
    function withdrawBeforeRestaking() external;

    /// @notice Called by the pod owner to withdraw the nonBeaconChainETHBalanceWei
    function withdrawNonBeaconChainETHBalanceWei(
        address recipient,
        uint256 amountToWithdraw
    ) external;

    /// @notice called by owner of a pod to remove any ERC20s deposited in the pod
    function recoverTokens(
        IERC20[] memory tokenList,
        uint256[] memory amountsToWithdraw,
        address recipient
    ) external;

    function initialize(address _podOwner) external;
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;

import "@openzeppelin/contracts/proxy/beacon/IBeacon.sol";
import "./IETHPOSDeposit.sol";
import "./IStrategyManager.sol";
import "./IEigenPod.sol";
import "./IBeaconChainOracle.sol";
import "./ISlasher.sol";
import "./IStrategy.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 {
    /// @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);

    /// @notice Emitted when a withdrawal of beacon chain ETH is completed
    event BeaconChainETHWithdrawalCompleted(
        address indexed podOwner,
        uint256 shares,
        uint96 nonce,
        address delegatedAddress,
        address withdrawer,
        bytes32 withdrawalRoot
    );

    /**
     * @notice Creates an EigenPod for the sender.
     * @dev Function will revert if the `msg.sender` already has an EigenPod.
     * @dev Returns EigenPod address
     */
    function createPod() external returns (address);

    /**
     * @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 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 The ETH2 Deposit Contract
    function ethPOS() external view returns (IETHPOSDeposit);

    /// @notice Beacon proxy to which the EigenPods point
    function eigenPodBeacon() external view returns (IBeacon);

    /// @notice Oracle contract that provides updates to the beacon chain's state
    function beaconChainOracle() external view returns (IBeaconChainOracle);

    /// @notice Returns the beacon block root at `timestamp`. Reverts if the Beacon block root at `timestamp` has not yet been finalized.
    function getBlockRootAtTimestamp(
        uint64 timestamp
    ) 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);

    /// @notice Returns 'true' if the `podOwner` has created an EigenPod, and 'false' otherwise.
    function hasPod(address podOwner) external view returns (bool);

    /// @notice Returns the number of EigenPods that have been created
    function numPods() external view returns (uint256);

    /// @notice Returns the maximum number of EigenPods that can be created
    function maxPods() external view returns (uint256);

    /**
     * @notice Mapping from Pod owner owner to the number of shares they have in the virtual beacon chain ETH strategy.
     * @dev The share amount can become negative. This is necessary to accommodate the fact that a pod owner's virtual beacon chain ETH shares can
     * decrease between the pod owner queuing and completing a withdrawal.
     * When the pod owner's shares would otherwise increase, this "deficit" is decreased first _instead_.
     * Likewise, when a withdrawal is completed, this "deficit" is decreased and the withdrawal amount is decreased; We can think of this
     * as the withdrawal "paying off the deficit".
     */
    function podOwnerShares(address podOwner) external view returns (int256);

    /// @notice returns canonical, virtual beaconChainETH strategy
    function beaconChainETHStrategy() external view returns (IStrategy);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;

/**
 * @title The interface for common signature utilities.
 * @author Layr Labs, Inc.
 * @notice Terms of Service: https://docs.eigenlayer.xyz/overview/terms-of-service
 */
interface ISignatureUtils {
    // @notice Struct that bundles together a signature and an expiration time for the signature. Used primarily for stack management.
    struct SignatureWithExpiry {
        // the signature itself, formatted as a single bytes object
        bytes signature;
        // the expiration timestamp (UTC) of the signature
        uint256 expiry;
    }

    // @notice Struct that bundles together a signature, a salt for uniqueness, and an expiration time for the signature. Used primarily for stack management.
    struct SignatureWithSaltAndExpiry {
        // the signature itself, formatted as a single bytes object
        bytes signature;
        // the salt used to generate the signature
        bytes32 salt;
        // the expiration timestamp (UTC) of the signature
        uint256 expiry;
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;

import "./IStrategyManager.sol";
import "./IDelegationManager.sol";

/**
 * @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 at which the contract begins being able to finalize the operator's registration with the service via calling `recordFirstStakeUpdate`
        uint32 registrationMayBeginAtBlock;
        // 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 Emitted when a middleware times is added to `operator`'s array.
    event MiddlewareTimesAdded(
        address operator,
        uint256 index,
        uint32 stalestUpdateBlock,
        uint32 latestServeUntilBlock
    );

    /// @notice Emitted when `operator` begins to allow `contractAddress` to slash them.
    event OptedIntoSlashing(
        address indexed operator,
        address indexed contractAddress
    );

    /// @notice Emitted when `contractAddress` signals that it will no longer be able to slash `operator` after the `contractCanSlashOperatorUntilBlock`.
    event SlashingAbilityRevoked(
        address indexed operator,
        address indexed contractAddress,
        uint32 contractCanSlashOperatorUntilBlock
    );

    /**
     * @notice Emitted when `slashingContract` 'freezes' the `slashedOperator`.
     * @dev The `slashingContract` must have permission to slash the `slashedOperator`, i.e. `canSlash(slasherOperator, slashingContract)` must return 'true'.
     */
    event OperatorFrozen(
        address indexed slashedOperator,
        address indexed slashingContract
    );

    /// @notice Emitted when `previouslySlashedAddress` is 'unfrozen', allowing them to again move deposited funds within EigenLayer.
    event FrozenStatusReset(address indexed previouslySlashedAddress);

    /**
     * @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 The StrategyManager contract of EigenLayer
    function strategyManager() external view returns (IStrategyManager);

    /// @notice The DelegationManager contract of EigenLayer
    function delegation() external view returns (IDelegationManager);

    /**
     * @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 getMiddlewareTimesIndexStalestUpdateBlock(
        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 >=0.5.0;

import "./IStakeRegistryStub.sol";

// @notice Stub interface to avoid circular-ish inheritance, where core contracts rely on middleware interfaces
interface IStakeRegistryStub {
    /**
     * @notice Used for updating information on deposits of nodes.
     * @param operators are the addresses of the operators whose stake information is getting updated
     */
    function updateStakes(address[] memory operators) external;
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.5.0;

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 `recipient`'s address
     * @param recipient 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 recipient,
        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 convenience function for fetching the current total shares of `user` in this strategy, by
     * querying the `strategyManager` contract
     */
    function shares(address user) external view 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 >=0.5.0;

import "./IStrategy.sol";
import "./ISlasher.sol";
import "./IDelegationManager.sol";
import "./IEigenPodManager.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 {
    /**
     * @notice Emitted when a new deposit occurs on behalf of `staker`.
     * @param staker Is the staker who is depositing funds into EigenLayer.
     * @param strategy Is the strategy that `staker` has deposited into.
     * @param token Is the token that `staker` deposited.
     * @param shares Is the number of new shares `staker` has been granted in `strategy`.
     */
    event Deposit(
        address staker,
        IERC20 token,
        IStrategy strategy,
        uint256 shares
    );

    /// @notice Emitted when the `strategyWhitelister` is changed
    event StrategyWhitelisterChanged(
        address previousAddress,
        address newAddress
    );

    /// @notice Emitted when a strategy is added to the approved list of strategies for deposit
    event StrategyAddedToDepositWhitelist(IStrategy strategy);

    /// @notice Emitted when a strategy is removed from the approved list of strategies for deposit
    event StrategyRemovedFromDepositWhitelist(IStrategy strategy);

    /**
     * @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 staker
     * @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 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 staker
     * @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 Used by the DelegationManager to remove a Staker's shares from a particular strategy when entering the withdrawal queue
    function removeShares(
        address staker,
        IStrategy strategy,
        uint256 shares
    ) external;

    /// @notice Used by the DelegationManager to award a Staker some shares that have passed through the withdrawal queue
    function addShares(
        address staker,
        IStrategy strategy,
        uint256 shares
    ) external;

    /// @notice Used by the DelegationManager to convert withdrawn shares to tokens and send them to a recipient
    function withdrawSharesAsTokens(
        address recipient,
        IStrategy strategy,
        uint256 shares,
        IERC20 token
    ) external;

    /// @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 staker's deposits and corresponding shares
     * @return (staker's strategies, shares in these strategies)
     */
    function getDeposits(
        address staker
    ) 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 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 EigenPodManager contract of EigenLayer
    function eigenPodManager() external view returns (IEigenPodManager);

    /// @notice Returns the address of the `strategyWhitelister`
    function strategyWhitelister() external view returns (address);

    // LIMITED BACKWARDS-COMPATIBILITY FOR DEPRECATED FUNCTIONALITY
    // packed struct for queued withdrawals; helps deal with stack-too-deep errors
    struct DeprecatedStruct_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 DeprecatedStruct_QueuedWithdrawal {
        IStrategy[] strategies;
        uint256[] shares;
        address staker;
        DeprecatedStruct_WithdrawerAndNonce withdrawerAndNonce;
        uint32 withdrawalStartBlock;
        address delegatedAddress;
    }

    function migrateQueuedWithdrawal(
        DeprecatedStruct_QueuedWithdrawal memory queuedWithdrawal
    ) external returns (bool, bytes32);

    function calculateWithdrawalRoot(
        DeprecatedStruct_QueuedWithdrawal memory queuedWithdrawal
    ) external pure returns (bytes32);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity ^0.8.0;

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	 = 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;

    //HISTORICAL_ROOTS_LIMIT = 2**24, so tree height is 24
    uint256 internal constant HISTORICAL_SUMMARIES_TREE_HEIGHT = 24;

    //Index of block_summary_root in historical_summary container
    uint256 internal constant BLOCK_SUMMARY_ROOT_INDEX = 0;

    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 https://github.com/ethereum/consensus-specs/blob/dev/specs/capella/beacon-chain.md#beaconblockbody
    uint256 internal constant EXECUTION_PAYLOAD_INDEX = 9;

    // in beacon block header https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#beaconblockheader
    uint256 internal constant SLOT_INDEX = 0;
    uint256 internal constant PROPOSER_INDEX_INDEX = 1;
    uint256 internal constant STATE_ROOT_INDEX = 3;
    uint256 internal constant BODY_ROOT_INDEX = 4;
    // in beacon state https://github.com/ethereum/consensus-specs/blob/dev/specs/capella/beacon-chain.md#beaconstate
    uint256 internal constant HISTORICAL_BATCH_STATE_ROOT_INDEX = 1;
    uint256 internal constant BEACON_STATE_SLOT_INDEX = 2;
    uint256 internal constant LATEST_BLOCK_HEADER_ROOT_INDEX = 4;
    uint256 internal constant BLOCK_ROOTS_INDEX = 5;
    uint256 internal constant STATE_ROOTS_INDEX = 6;
    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_SUMMARIES_INDEX = 27;

    // in validator https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/beacon-chain.md#validator
    uint256 internal constant VALIDATOR_PUBKEY_INDEX = 0;
    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 TIMESTAMP_INDEX = 9;
    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

    /// @notice The number of slots each epoch in the beacon chain
    uint64 internal constant SLOTS_PER_EPOCH = 32;

    /// @notice The number of seconds in a slot in the beacon chain
    uint64 internal constant SECONDS_PER_SLOT = 12;

    /// @notice Number of seconds per epoch: 384 == 32 slots/epoch * 12 seconds/slot
    uint64 internal constant SECONDS_PER_EPOCH =
        SLOTS_PER_EPOCH * SECONDS_PER_SLOT;

    bytes8 internal constant UINT64_MASK = 0xffffffffffffffff;

    /// @notice This struct contains the merkle proofs and leaves needed to verify a partial/full withdrawal
    struct WithdrawalProof {
        bytes withdrawalProof;
        bytes slotProof;
        bytes executionPayloadProof;
        bytes timestampProof;
        bytes historicalSummaryBlockRootProof;
        uint64 blockRootIndex;
        uint64 historicalSummaryIndex;
        uint64 withdrawalIndex;
        bytes32 blockRoot;
        bytes32 slotRoot;
        bytes32 timestampRoot;
        bytes32 executionPayloadRoot;
    }

    /// @notice This struct contains the merkle proofs and leaves needed to verify a balance update
    struct BalanceUpdateProof {
        bytes validatorBalanceProof;
        bytes validatorFieldsProof;
        bytes32 balanceRoot;
    }

    /// @notice This struct contains the root and proof for verifying the state root against the oracle block root
    struct StateRootProof {
        bytes32 beaconStateRoot;
        bytes proof;
    }

    /**
     * @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 validatorFieldsProof is the data used in proving the validator's fields
     * @param validatorFields the claimed fields of the validator
     */
    function verifyValidatorFields(
        bytes32 beaconStateRoot,
        bytes32[] calldata validatorFields,
        bytes calldata validatorFieldsProof,
        uint40 validatorIndex
    ) 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(
            validatorFieldsProof.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: validatorFieldsProof,
                root: beaconStateRoot,
                leaf: validatorRoot,
                index: 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 validatorBalanceProof 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 `getBalanceAtIndex` for detailed explanation)
     */
    function verifyValidatorBalance(
        bytes32 beaconStateRoot,
        bytes32 balanceRoot,
        bytes calldata validatorBalanceProof,
        uint40 validatorIndex
    ) internal view {
        require(
            validatorBalanceProof.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);
        /**
         * Note: Merkleization of the balance root tree uses MerkleizeWithMixin, i.e., the length of the array is hashed with the root of
         * the array.  Thus we shift the BALANCE_INDEX over by BALANCE_TREE_HEIGHT + 1 and not just BALANCE_TREE_HEIGHT.
         */
        balanceIndex =
            (BALANCE_INDEX << (BALANCE_TREE_HEIGHT + 1)) |
            balanceIndex;

        require(
            Merkle.verifyInclusionSha256({
                proof: validatorBalanceProof,
                root: beaconStateRoot,
                leaf: balanceRoot,
                index: balanceIndex
            }),
            "BeaconChainProofs.verifyValidatorBalance: Invalid merkle proof"
        );
    }

    /**
     * @notice This function verifies the latestBlockHeader against the state root. the latestBlockHeader is
     * a tracked in the beacon state.
     * @param beaconStateRoot is the beacon chain state root to be proven against.
     * @param stateRootProof is the provided merkle proof
     * @param latestBlockRoot is hashtree root of the latest block header in the beacon state
     */
    function verifyStateRootAgainstLatestBlockRoot(
        bytes32 latestBlockRoot,
        bytes32 beaconStateRoot,
        bytes calldata stateRootProof
    ) internal view {
        require(
            stateRootProof.length ==
                32 * (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyStateRootAgainstLatestBlockRoot: Proof has incorrect length"
        );
        //Next we verify the slot against the blockRoot
        require(
            Merkle.verifyInclusionSha256({
                proof: stateRootProof,
                root: latestBlockRoot,
                leaf: beaconStateRoot,
                index: STATE_ROOT_INDEX
            }),
            "BeaconChainProofs.verifyStateRootAgainstLatestBlockRoot: Invalid latest block header root merkle proof"
        );
    }

    /**
     * @notice This function verifies the slot and the withdrawal fields for a given withdrawal
     * @param withdrawalProof is the provided set of merkle proofs
     * @param withdrawalFields is the serialized withdrawal container to be proven
     */
    function verifyWithdrawal(
        bytes32 beaconStateRoot,
        bytes32[] calldata withdrawalFields,
        WithdrawalProof calldata withdrawalProof
    ) internal view {
        require(
            withdrawalFields.length == 2 ** WITHDRAWAL_FIELD_TREE_HEIGHT,
            "BeaconChainProofs.verifyWithdrawal: withdrawalFields has incorrect length"
        );

        require(
            withdrawalProof.blockRootIndex < 2 ** BLOCK_ROOTS_TREE_HEIGHT,
            "BeaconChainProofs.verifyWithdrawal: blockRootIndex is too large"
        );
        require(
            withdrawalProof.withdrawalIndex < 2 ** WITHDRAWALS_TREE_HEIGHT,
            "BeaconChainProofs.verifyWithdrawal: withdrawalIndex is too large"
        );

        require(
            withdrawalProof.historicalSummaryIndex <
                2 ** HISTORICAL_SUMMARIES_TREE_HEIGHT,
            "BeaconChainProofs.verifyWithdrawal: historicalSummaryIndex is too large"
        );

        require(
            withdrawalProof.withdrawalProof.length ==
                32 *
                    (EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT +
                        WITHDRAWALS_TREE_HEIGHT +
                        1),
            "BeaconChainProofs.verifyWithdrawal: withdrawalProof has incorrect length"
        );
        require(
            withdrawalProof.executionPayloadProof.length ==
                32 *
                    (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT +
                        BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawal: executionPayloadProof has incorrect length"
        );
        require(
            withdrawalProof.slotProof.length ==
                32 * (BEACON_BLOCK_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawal: slotProof has incorrect length"
        );
        require(
            withdrawalProof.timestampProof.length ==
                32 * (EXECUTION_PAYLOAD_HEADER_FIELD_TREE_HEIGHT),
            "BeaconChainProofs.verifyWithdrawal: timestampProof has incorrect length"
        );

        require(
            withdrawalProof.historicalSummaryBlockRootProof.length ==
                32 *
                    (BEACON_STATE_FIELD_TREE_HEIGHT +
                        (HISTORICAL_SUMMARIES_TREE_HEIGHT + 1) +
                        1 +
                        (BLOCK_ROOTS_TREE_HEIGHT)),
            "BeaconChainProofs.verifyWithdrawal: historicalSummaryBlockRootProof has incorrect length"
        );
        /**
         * Note: Here, the "1" in "1 + (BLOCK_ROOTS_TREE_HEIGHT)" signifies that extra step of choosing the "block_root_summary" within the individual
         * "historical_summary". Everywhere else it signifies merkelize_with_mixin, where the length of an array is hashed with the root of the array,
         * but not here.
         */
        uint256 historicalBlockHeaderIndex = (HISTORICAL_SUMMARIES_INDEX <<
            ((HISTORICAL_SUMMARIES_TREE_HEIGHT + 1) +
                1 +
                (BLOCK_ROOTS_TREE_HEIGHT))) |
            (uint256(withdrawalProof.historicalSummaryIndex) <<
                (1 + (BLOCK_ROOTS_TREE_HEIGHT))) |
            (BLOCK_SUMMARY_ROOT_INDEX << (BLOCK_ROOTS_TREE_HEIGHT)) |
            uint256(withdrawalProof.blockRootIndex);

        require(
            Merkle.verifyInclusionSha256({
                proof: withdrawalProof.historicalSummaryBlockRootProof,
                root: beaconStateRoot,
                leaf: withdrawalProof.blockRoot,
                index: historicalBlockHeaderIndex
            }),
            "BeaconChainProofs.verifyWithdrawal: Invalid historicalsummary merkle proof"
        );

        //Next we verify the slot against the blockRoot
        require(
            Merkle.verifyInclusionSha256({
                proof: withdrawalProof.slotProof,
                root: withdrawalProof.blockRoot,
                leaf: withdrawalProof.slotRoot,
                index: SLOT_INDEX
            }),
            "BeaconChainProofs.verifyWithdrawal: Invalid slot merkle proof"
        );

        {
            // Next we verify the executionPayloadRoot against the blockRoot
            uint256 executionPayloadIndex = (BODY_ROOT_INDEX <<
                (BEACON_BLOCK_BODY_FIELD_TREE_HEIGHT)) |
                EXECUTION_PAYLOAD_INDEX;
            require(
                Merkle.verifyInclusionSha256({
                    proof: withdrawalProof.executionPayloadProof,
                    root: withdrawalProof.blockRoot,
                    leaf: withdrawalProof.executionPayloadRoot,
                    index: executionPayloadIndex
                }),
                "BeaconChainProofs.verifyWithdrawal: Invalid executionPayload merkle proof"
            );
        }

        // Next we verify the timestampRoot against the executionPayload root
        require(
            Merkle.verifyInclusionSha256({
                proof: withdrawalProof.timestampProof,
                root: withdrawalProof.executionPayloadRoot,
                leaf: withdrawalProof.timestampRoot,
                index: TIMESTAMP_INDEX
            }),
            "BeaconChainProofs.verifyWithdrawal: Invalid blockNumber merkle proof"
        );

        {
            /**
             * Next we verify the withdrawal fields against the blockRoot:
             * First we compute the withdrawal_index relative to the blockRoot by concatenating the indexes of all the
             * intermediate root indexes from the bottom of the sub trees (the withdrawal container) to the top, the blockRoot.
             * Then we calculate merkleize the withdrawalFields container to calculate the the withdrawalRoot.
             * Finally we verify the withdrawalRoot against the executionPayloadRoot.
             *
             *
             * Note: Merkleization of the withdrawals root tree uses MerkleizeWithMixin, i.e., the length of the array is hashed with the root of
             * the array.  Thus we shift the WITHDRAWALS_INDEX over by WITHDRAWALS_TREE_HEIGHT + 1 and not just WITHDRAWALS_TREE_HEIGHT.
             */
            uint256 withdrawalIndex = (WITHDRAWALS_INDEX <<
                (WITHDRAWALS_TREE_HEIGHT + 1)) |
                uint256(withdrawalProof.withdrawalIndex);
            bytes32 withdrawalRoot = Merkle.merkleizeSha256(withdrawalFields);
            require(
                Merkle.verifyInclusionSha256({
                    proof: withdrawalProof.withdrawalProof,
                    root: withdrawalProof.executionPayloadRoot,
                    leaf: withdrawalRoot,
                    index: withdrawalIndex
                }),
                "BeaconChainProofs.verifyWithdrawal: Invalid withdrawal merkle proof"
            );
        }
    }

    /**
     * @notice This function replicates the ssz hashing of a validator's pubkey, outlined below:
     *  hh := ssz.NewHasher()
     *  hh.PutBytes(validatorPubkey[:])
     *  validatorPubkeyHash := hh.Hash()
     *  hh.Reset()
     */
    function hashValidatorBLSPubkey(
        bytes memory validatorPubkey
    ) internal pure returns (bytes32 pubkeyHash) {
        require(
            validatorPubkey.length == 48,
            "Input should be 48 bytes in length"
        );
        return sha256(abi.encodePacked(validatorPubkey, bytes16(0)));
    }

    /**
     * @notice Parses a balanceRoot to get the uint64 balance of a validator.
     * @dev During merkleization of the beacon state balance tree, four uint64 values are treated as a single
     * leaf in the merkle tree. We use validatorIndex % 4 to determine which of the four uint64 values to
     * extract from the balanceRoot.
     * @param balanceRoot is the combination of 4 validator balances being proven for
     * @param validatorIndex is the index of the validator being proven for
     * @return The validator's balance, in Gwei
     */
    function getBalanceAtIndex(
        bytes32 balanceRoot,
        uint40 validatorIndex
    ) internal pure returns (uint64) {
        uint256 bitShiftAmount = (validatorIndex % 4) * 64;
        return
            Endian.fromLittleEndianUint64(
                bytes32((uint256(balanceRoot) << bitShiftAmount))
            );
    }

    /**
     * @dev Retrieve the withdrawal timestamp
     */
    function getWithdrawalTimestamp(
        WithdrawalProof memory withdrawalProof
    ) internal pure returns (uint64) {
        return Endian.fromLittleEndianUint64(withdrawalProof.timestampRoot);
    }

    /**
     * @dev Converts the withdrawal's slot to an epoch
     */
    function getWithdrawalEpoch(
        WithdrawalProof memory withdrawalProof
    ) internal pure returns (uint64) {
        return
            Endian.fromLittleEndianUint64(withdrawalProof.slotRoot) /
            SLOTS_PER_EPOCH;
    }

    /**
     * Indices for validator fields (refer to consensus specs):
     * 0: pubkey
     * 1: withdrawal credentials
     * 2: effective balance
     * 3: slashed?
     * 4: activation elligibility epoch
     * 5: activation epoch
     * 6: exit epoch
     * 7: withdrawable epoch
     */

    /**
     * @dev Retrieves a validator's pubkey hash
     */
    function getPubkeyHash(
        bytes32[] memory validatorFields
    ) internal pure returns (bytes32) {
        return validatorFields[VALIDATOR_PUBKEY_INDEX];
    }

    function getWithdrawalCredentials(
        bytes32[] memory validatorFields
    ) internal pure returns (bytes32) {
        return validatorFields[VALIDATOR_WITHDRAWAL_CREDENTIALS_INDEX];
    }

    /**
     * @dev Retrieves a validator's effective balance (in gwei)
     */
    function getEffectiveBalanceGwei(
        bytes32[] memory validatorFields
    ) internal pure returns (uint64) {
        return
            Endian.fromLittleEndianUint64(
                validatorFields[VALIDATOR_BALANCE_INDEX]
            );
    }

    /**
     * @dev Retrieves a validator's withdrawable epoch
     */
    function getWithdrawableEpoch(
        bytes32[] memory validatorFields
    ) internal pure returns (uint64) {
        return
            Endian.fromLittleEndianUint64(
                validatorFields[VALIDATOR_WITHDRAWABLE_EPOCH_INDEX]
            );
    }

    /**
     * Indices for withdrawal fields (refer to consensus specs):
     * 0: withdrawal index
     * 1: validator index
     * 2: execution address
     * 3: withdrawal amount
     */

    /**
     * @dev Retrieves a withdrawal's validator index
     */
    function getValidatorIndex(
        bytes32[] memory withdrawalFields
    ) internal pure returns (uint40) {
        return
            uint40(
                Endian.fromLittleEndianUint64(
                    withdrawalFields[WITHDRAWAL_VALIDATOR_INDEX_INDEX]
                )
            );
    }

    /**
     * @dev Retrieves a withdrawal's withdrawal amount (in gwei)
     */
    function getWithdrawalAmountGwei(
        bytes32[] memory withdrawalFields
    ) internal pure returns (uint64) {
        return
            Endian.fromLittleEndianUint64(
                withdrawalFields[WITHDRAWAL_VALIDATOR_AMOUNT_INDEX]
            );
    }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

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: BUSL-1.1
// Adapted from OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @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: MIT
pragma solidity ^0.8.20;

import "./IRestakerFacets.sol";

/**
 * @title Diamond-like implementation which support call with context (simple call).
 * @author GenesisLST
 */
interface IRestaker {
    error RestakerCannotClaim();

    event Claimed(address indexed recipient, uint256 amount);

    function initialize(address owner, IRestakerFacets facets) external;
    function __claim() external;
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "./IRestaker.sol";

interface IRestakerDeployer {
    event RestakerDeployed(
        address indexed creator,
        IRestaker indexed restaker,
        uint256 id
    );

    function BEACON_PROXY_BYTECODE() external view returns (bytes memory);

    function beacon() external view returns (address);

    function nonce() external view returns (uint256);

    function deployRestaker() external returns (IRestaker restaker);

    function getRestaker(uint256 id) external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "../interfaces/IEigenPodManager.sol";

interface IRestakerFacets {
    error ZeroAddress();

    enum FuncTarget {
        POD,
        POD_MANAGER,
        DELEGATION_MANAGER
    }

    function selectorToTarget(bytes4 sig) external view returns (address);

    function getEigenPodManager() external view returns (IEigenPodManager);
}

{
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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[{"inputs":[{"internalType":"address","name":"beacon_","type":"address"},{"internalType":"contract IRestakerFacets","name":"facets_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"Create2EmptyBytecode","type":"error"},{"inputs":[],"name":"Create2FailedDeployment","type":"error"},{"inputs":[{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"uint256","name":"needed","type":"uint256"}],"name":"Create2InsufficientBalance","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"creator","type":"address"},{"indexed":true,"internalType":"contract IRestaker","name":"restaker","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"}],"name":"RestakerDeployed","type":"event"},{"inputs":[],"name":"BEACON_PROXY_BYTECODE","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"beacon","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"deployRestaker","outputs":[{"internalType":"contract IRestaker","name":"restaker","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"facets","outputs":[{"internalType":"contract IRestakerFacets","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"getRestaker","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nonce","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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00000000000000000000000082d87f4c7171cabb9ac55ae3f60f7d15f595a46a000000000000000000000000161cd8fd2694d220e246854e177b726d8e36971d

-----Decoded View---------------
Arg [0] : beacon_ (address): 0x82D87F4c7171CABb9Ac55Ae3F60F7d15f595A46a
Arg [1] : facets_ (address): 0x161Cd8fD2694D220e246854E177B726D8E36971d

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000082d87f4c7171cabb9ac55ae3f60f7d15f595a46a
Arg [1] : 000000000000000000000000161cd8fd2694d220e246854e177b726d8e36971d