// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

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

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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

//SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.10;

import "./interfaces/IFeeDispatcher.sol";
import "./libs/DispatchersStorageLib.sol";
import "./interfaces/IFeeRecipient.sol";

contract AuthorizedFeeRecipient is IFeeRecipient {
    /// @notice Constructor replay prevention
    bool internal initialized;
    /// @notice Address where funds are sent to be dispatched
    IFeeDispatcher internal dispatcher;
    /// @notice Public Key root assigned to this receiver
    bytes32 internal publicKeyRoot;
    /// @notice Address of the staking contract
    address internal stakingContract;

    error AlreadyInitialized();
    error Unauthorized();

    /// @notice Initializes the receiver
    /// @param _dispatcher Address that will handle the fee dispatching
    /// @param _publicKeyRoot Public Key root assigned to this receiver
    function init(address _dispatcher, bytes32 _publicKeyRoot) external {
        if (initialized) {
            revert AlreadyInitialized();
        }
        initialized = true;
        dispatcher = IFeeDispatcher(_dispatcher);
        publicKeyRoot = _publicKeyRoot;
        stakingContract = msg.sender; // The staking contract always calls init
    }

    /// @notice Empty calldata fallback
    receive() external payable {}

    /// @notice Non-empty calldata fallback
    fallback() external payable {}

    /// @notice Triggers a withdrawal by sending its funds + its public key root to the dispatcher
    /// @dev Can be called only be called through the staking contract
    function withdraw() external {
        if (msg.sender != stakingContract) {
            revert Unauthorized();
        }
        dispatcher.dispatch{value: address(this).balance}(publicKeyRoot);
    }

    /// @notice Retrieve the assigned public key root
    function getPublicKeyRoot() external view returns (bytes32) {
        return publicKeyRoot;
    }

    /// @notice retrieve the assigned withdrawer
    function getWithdrawer() external view returns (address) {
        return dispatcher.getWithdrawer(publicKeyRoot);
    }
}

//SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

/// Based on GNSPS/BytesLib.sol
library BytesLib {
    function concat(bytes memory _preBytes, bytes memory _postBytes) internal pure returns (bytes memory) {
        bytes memory tempBytes;

        assembly {
            // Get a location of some free memory and store it in tempBytes as
            // Solidity does for memory variables.
            tempBytes := mload(0x40)

            // Store the length of the first bytes array at the beginning of
            // the memory for tempBytes.
            let length := mload(_preBytes)
            mstore(tempBytes, length)

            // Maintain a memory counter for the current write location in the
            // temp bytes array by adding the 32 bytes for the array length to
            // the starting location.
            let mc := add(tempBytes, 0x20)
            // Stop copying when the memory counter reaches the length of the
            // first bytes array.
            let end := add(mc, length)

            for {
                // Initialize a copy counter to the start of the _preBytes data,
                // 32 bytes into its memory.
                let cc := add(_preBytes, 0x20)
            } lt(mc, end) {
                // Increase both counters by 32 bytes each iteration.
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                // Write the _preBytes data into the tempBytes memory 32 bytes
                // at a time.
                mstore(mc, mload(cc))
            }

            // Add the length of _postBytes to the current length of tempBytes
            // and store it as the new length in the first 32 bytes of the
            // tempBytes memory.
            length := mload(_postBytes)
            mstore(tempBytes, add(length, mload(tempBytes)))

            // Move the memory counter back from a multiple of 0x20 to the
            // actual end of the _preBytes data.
            mc := end
            // Stop copying when the memory counter reaches the new combined
            // length of the arrays.
            end := add(mc, length)

            for {
                let cc := add(_postBytes, 0x20)
            } lt(mc, end) {
                mc := add(mc, 0x20)
                cc := add(cc, 0x20)
            } {
                mstore(mc, mload(cc))
            }

            // Update the free-memory pointer by padding our last write location
            // to 32 bytes: add 31 bytes to the end of tempBytes to move to the
            // next 32 byte block, then round down to the nearest multiple of
            // 32. If the sum of the length of the two arrays is zero then add
            // one before rounding down to leave a blank 32 bytes (the length block with 0).
            mstore(
                0x40,
                and(
                    add(add(end, iszero(add(length, mload(_preBytes)))), 31),
                    not(31) // Round down to the nearest 32 bytes.
                )
            )
        }

        return tempBytes;
    }

    function slice(
        bytes memory _bytes,
        uint256 _start,
        uint256 _length
    ) internal pure returns (bytes memory) {
        require(_length + 31 >= _length, "slice_overflow");
        require(_bytes.length >= _start + _length, "slice_outOfBounds");

        bytes memory tempBytes;

        assembly {
            switch iszero(_length)
            case 0 {
                // Get a location of some free memory and store it in tempBytes as
                // Solidity does for memory variables.
                tempBytes := mload(0x40)

                // The first word of the slice result is potentially a partial
                // word read from the original array. To read it, we calculate
                // the length of that partial word and start copying that many
                // bytes into the array. The first word we copy will start with
                // data we don't care about, but the last `lengthmod` bytes will
                // land at the beginning of the contents of the new array. When
                // we're done copying, we overwrite the full first word with
                // the actual length of the slice.
                let lengthmod := and(_length, 31)

                // The multiplication in the next line is necessary
                // because when slicing multiples of 32 bytes (lengthmod == 0)
                // the following copy loop was copying the origin's length
                // and then ending prematurely not copying everything it should.
                let mc := add(add(tempBytes, lengthmod), mul(0x20, iszero(lengthmod)))
                let end := add(mc, _length)

                for {
                    // The multiplication in the next line has the same exact purpose
                    // as the one above.
                    let cc := add(add(add(_bytes, lengthmod), mul(0x20, iszero(lengthmod))), _start)
                } lt(mc, end) {
                    mc := add(mc, 0x20)
                    cc := add(cc, 0x20)
                } {
                    mstore(mc, mload(cc))
                }

                mstore(tempBytes, _length)

                //update free-memory pointer
                //allocating the array padded to 32 bytes like the compiler does now
                mstore(0x40, and(add(mc, 31), not(31)))
            }
            //if we want a zero-length slice let's just return a zero-length array
            default {
                tempBytes := mload(0x40)
                //zero out the 32 bytes slice we are about to return
                //we need to do it because Solidity does not garbage collect
                mstore(tempBytes, 0)

                mstore(0x40, add(tempBytes, 0x20))
            }
        }

        return tempBytes;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/Clones.sol)

pragma solidity ^0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address implementation) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `implementation` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(
        address implementation,
        bytes32 salt,
        address deployer
    ) internal pure returns (address predicted) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address implementation, bytes32 salt)
        internal
        view
        returns (address predicted)
    {
        return predictDeterministicAddress(implementation, salt, address(this));
    }
}

//SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.10;

import "./libs/DispatchersStorageLib.sol";
import "./interfaces/IStakingContractFeeDetails.sol";
import "./interfaces/IFeeDispatcher.sol";

/// @title Consensus Layer Fee Recipient
/// @author Kiln
/// @notice This contract can be used to receive fees from a validator and split them with a node operator
contract ConsensusLayerFeeDispatcher is IFeeDispatcher {
    using DispatchersStorageLib for bytes32;

    event Withdrawal(
        address indexed withdrawer,
        address indexed feeRecipient,
        bytes32 pubKeyRoot,
        uint256 rewards,
        uint256 nodeOperatorFee,
        uint256 treasuryFee
    );

    error TreasuryReceiveError(bytes errorData);
    error FeeRecipientReceiveError(bytes errorData);
    error WithdrawerReceiveError(bytes errorData);
    error ZeroBalanceWithdrawal();
    error AlreadyInitialized();
    error InvalidCall();

    bytes32 internal constant STAKING_CONTRACT_ADDRESS_SLOT =
        keccak256("ConsensusLayerFeeRecipient.stakingContractAddress");
    uint256 internal constant BASIS_POINTS = 10_000;
    bytes32 internal constant VERSION_SLOT = keccak256("ConsensusLayerFeeRecipient.version");

    /// @notice Ensures an initialisation call has been called only once per _version value
    /// @param _version The current initialisation value
    modifier init(uint256 _version) {
        if (_version != VERSION_SLOT.getUint256() + 1) {
            revert AlreadyInitialized();
        }

        VERSION_SLOT.setUint256(_version);

        _;
    }

    /// @notice Constructor method allowing us to prevent calls to initCLFR by setting the appropriate version
    constructor(uint256 _version) {
        VERSION_SLOT.setUint256(_version);
    }

    /// @notice Initialize the contract by storing the staking contract
    /// @param _stakingContract Address of the Staking Contract
    function initCLD(address _stakingContract) external init(1) {
        STAKING_CONTRACT_ADDRESS_SLOT.setAddress(_stakingContract);
    }

    /// @notice Performs a withdrawal on this contract's balance
    function dispatch(bytes32 _publicKeyRoot) external payable {
        IStakingContractFeeDetails stakingContract = IStakingContractFeeDetails(
            STAKING_CONTRACT_ADDRESS_SLOT.getAddress()
        );

        uint256 balance = address(this).balance; // this has taken into account msg.value
        if (balance == 0) {
            revert ZeroBalanceWithdrawal();
        }

        bool exitRequested = stakingContract.getExitRequestedFromRoot(_publicKeyRoot);
        bool withdrawn = stakingContract.getWithdrawnFromPublicKeyRoot(_publicKeyRoot);

        uint256 nonExemptBalance = balance;

        if (exitRequested && balance >= 31 ether && !withdrawn) {
            // If the skimmed rewards were withdrawn and the validator then underperformed
            // an healthy exit can be slightly lower than 32 ETH
            // We exempt the balance up to 32 ETH, happens only once.
            // !withdrawn prevents this logic being reused to not pay the fee on rewards
            uint256 exemption = nonExemptBalance > 32 ether ? 32 ether : nonExemptBalance;
            nonExemptBalance -= exemption;
            stakingContract.toggleWithdrawnFromPublicKeyRoot(_publicKeyRoot);
        }
        // In case of slashing the exit is not requested we don't exempt anything
        // This is in case of slashing, the staker will be rebated manually
        // A slashed validator may have accumulated enough skimmed rewards to still have a balance > 32 ETH
        // All of this will be taken into account and the staker will be compensated for the commission taken
        // on its principal and the loss according to the SLA described in the Terms&Conditions

        uint256 globalFee = (nonExemptBalance * stakingContract.getGlobalFee()) / BASIS_POINTS;
        uint256 operatorFee = (globalFee * stakingContract.getOperatorFee()) / BASIS_POINTS;
        address operator = stakingContract.getOperatorFeeRecipient(_publicKeyRoot);
        address treasury = stakingContract.getTreasury();
        address withdrawer = stakingContract.getWithdrawerFromPublicKeyRoot(_publicKeyRoot);

        (bool status, bytes memory data) = withdrawer.call{value: balance - globalFee}("");
        if (status == false) {
            revert WithdrawerReceiveError(data);
        }
        if (globalFee > 0) {
            (status, data) = treasury.call{value: globalFee - operatorFee}("");
            if (status == false) {
                revert TreasuryReceiveError(data);
            }
        }
        if (operatorFee > 0) {
            (status, data) = operator.call{value: operatorFee}("");
            if (status == false) {
                revert FeeRecipientReceiveError(data);
            }
        }
        emit Withdrawal(
            withdrawer,
            operator,
            _publicKeyRoot,
            balance - globalFee,
            operatorFee,
            globalFee - operatorFee
        );
    }

    /// @notice Retrieve the staking contract address
    function getStakingContract() external view returns (address) {
        return STAKING_CONTRACT_ADDRESS_SLOT.getAddress();
    }

    /// @notice Retrieve the assigned withdrawer for the given public key root
    /// @param _publicKeyRoot Public key root to get the owner
    function getWithdrawer(bytes32 _publicKeyRoot) external view returns (address) {
        IStakingContractFeeDetails stakingContract = IStakingContractFeeDetails(
            STAKING_CONTRACT_ADDRESS_SLOT.getAddress()
        );
        return stakingContract.getWithdrawerFromPublicKeyRoot(_publicKeyRoot);
    }

    receive() external payable {
        revert InvalidCall();
    }

    fallback() external payable {
        revert InvalidCall();
    }
}

//SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

library DispatchersStorageLib {
    function getUint256(bytes32 position) internal view returns (uint256 data) {
        assembly {
            data := sload(position)
        }
    }

    function setUint256(bytes32 position, uint256 data) internal {
        assembly {
            sstore(position, data)
        }
    }

    function getAddress(bytes32 position) internal view returns (address data) {
        assembly {
            data := sload(position)
        }
    }

    function setAddress(bytes32 position, address data) internal {
        assembly {
            sstore(position, data)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/ERC1967/ERC1967Proxy.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev This contract implements an upgradeable proxy. It is upgradeable because calls are delegated to an
 * implementation address that can be changed. This address is stored in storage in the location specified by
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967], so that it doesn't conflict with the storage layout of the
 * implementation behind the proxy.
 */
contract ERC1967Proxy is Proxy, ERC1967Upgrade {
    /**
     * @dev Initializes the upgradeable proxy with an initial implementation specified by `_logic`.
     *
     * If `_data` is nonempty, it's used as data in a delegate call to `_logic`. This will typically be an encoded
     * function call, and allows initializating the storage of the proxy like a Solidity constructor.
     */
    constructor(address _logic, bytes memory _data) payable {
        assert(_IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        _upgradeToAndCall(_logic, _data, false);
    }

    /**
     * @dev Returns the current implementation address.
     */
    function _implementation() internal view virtual override returns (address impl) {
        return ERC1967Upgrade._getImplementation();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

//SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.10;

import "./libs/DispatchersStorageLib.sol";
import "./interfaces/IStakingContractFeeDetails.sol";
import "./interfaces/IFeeDispatcher.sol";

/// @title Execution Layer Fee Recipient
/// @author Kiln
/// @notice This contract can be used to receive fees from a validator and split them with a node operator
contract ExecutionLayerFeeDispatcher is IFeeDispatcher {
    using DispatchersStorageLib for bytes32;

    event Withdrawal(
        address indexed withdrawer,
        address indexed feeRecipient,
        bytes32 pubKeyRoot,
        uint256 rewards,
        uint256 nodeOperatorFee,
        uint256 treasuryFee
    );

    error TreasuryReceiveError(bytes errorData);
    error FeeRecipientReceiveError(bytes errorData);
    error WithdrawerReceiveError(bytes errorData);
    error ZeroBalanceWithdrawal();
    error AlreadyInitialized();
    error InvalidCall();

    bytes32 internal constant STAKING_CONTRACT_ADDRESS_SLOT =
        keccak256("ExecutionLayerFeeRecipient.stakingContractAddress");
    uint256 internal constant BASIS_POINTS = 10_000;
    bytes32 internal constant VERSION_SLOT = keccak256("ExecutionLayerFeeRecipient.version");

    /// @notice Ensures an initialisation call has been called only once per _version value
    /// @param _version The current initialisation value
    modifier init(uint256 _version) {
        if (_version != VERSION_SLOT.getUint256() + 1) {
            revert AlreadyInitialized();
        }

        VERSION_SLOT.setUint256(_version);

        _;
    }

    /// @notice Constructor method allowing us to prevent calls to initCLFR by setting the appropriate version
    constructor(uint256 _version) {
        VERSION_SLOT.setUint256(_version);
    }

    /// @notice Initialize the contract by storing the staking contract and the public key in storage
    /// @param _stakingContract Address of the Staking Contract
    function initELD(address _stakingContract) external init(1) {
        STAKING_CONTRACT_ADDRESS_SLOT.setAddress(_stakingContract);
    }

    /// @notice Performs a withdrawal on this contract's balance
    function dispatch(bytes32 _publicKeyRoot) external payable {
        uint256 balance = address(this).balance;
        if (balance == 0) {
            revert ZeroBalanceWithdrawal();
        }
        IStakingContractFeeDetails stakingContract = IStakingContractFeeDetails(
            STAKING_CONTRACT_ADDRESS_SLOT.getAddress()
        );
        address withdrawer = stakingContract.getWithdrawerFromPublicKeyRoot(_publicKeyRoot);
        address operator = stakingContract.getOperatorFeeRecipient(_publicKeyRoot);
        address treasury = stakingContract.getTreasury();
        uint256 globalFee = (balance * stakingContract.getGlobalFee()) / BASIS_POINTS;
        uint256 operatorFee = (globalFee * stakingContract.getOperatorFee()) / BASIS_POINTS;

        (bool status, bytes memory data) = withdrawer.call{value: balance - globalFee}("");
        if (status == false) {
            revert WithdrawerReceiveError(data);
        }
        if (globalFee > 0) {
            (status, data) = treasury.call{value: globalFee - operatorFee}("");
            if (status == false) {
                revert TreasuryReceiveError(data);
            }
        }
        if (operatorFee > 0) {
            (status, data) = operator.call{value: operatorFee}("");
            if (status == false) {
                revert FeeRecipientReceiveError(data);
            }
        }
        emit Withdrawal(
            withdrawer,
            operator,
            _publicKeyRoot,
            balance - globalFee,
            operatorFee,
            globalFee - operatorFee
        );
    }

    /// @notice Retrieve the staking contract address
    function getStakingContract() external view returns (address) {
        return STAKING_CONTRACT_ADDRESS_SLOT.getAddress();
    }

    /// @notice Retrieve the assigned withdrawer for the given public key root
    /// @param _publicKeyRoot Public key root to get the owner
    function getWithdrawer(bytes32 _publicKeyRoot) external view returns (address) {
        IStakingContractFeeDetails stakingContract = IStakingContractFeeDetails(
            STAKING_CONTRACT_ADDRESS_SLOT.getAddress()
        );
        return stakingContract.getWithdrawerFromPublicKeyRoot(_publicKeyRoot);
    }

    receive() external payable {
        revert InvalidCall();
    }

    fallback() external payable {
        revert InvalidCall();
    }
}

//SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.10;

import "./interfaces/IFeeDispatcher.sol";

contract FeeRecipient {
    /// @notice Constructor replay prevention
    bool internal initialized;
    /// @notice Address where funds are sent to be dispatched
    IFeeDispatcher internal dispatcher;
    /// @notice Public Key root assigned to this receiver
    bytes32 internal publicKeyRoot;

    error AlreadyInitialized();

    /// @notice Initializes the receiver
    /// @param _dispatcher Address that will handle the fee dispatching
    /// @param _publicKeyRoot Public Key root assigned to this receiver
    function init(address _dispatcher, bytes32 _publicKeyRoot) external {
        if (initialized) {
            revert AlreadyInitialized();
        }
        initialized = true;
        dispatcher = IFeeDispatcher(_dispatcher);
        publicKeyRoot = _publicKeyRoot;
    }

    /// @notice Empty calldata fallback
    receive() external payable {}

    /// @notice Non-empty calldata fallback
    fallback() external payable {}

    /// @notice Triggers a withdrawal by sending its funds + its public key root to the dispatcher
    /// @dev Can be called by any wallet as recipients are not parameters
    function withdraw() external {
        dispatcher.dispatch{value: address(this).balance}(publicKeyRoot);
    }

    /// @notice Retrieve the assigned public key root
    function getPublicKeyRoot() external view returns (bytes32) {
        return publicKeyRoot;
    }

    /// @notice retrieve the assigned withdrawer
    function getWithdrawer() external view returns (address) {
        return dispatcher.getWithdrawer(publicKeyRoot);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

interface IDepositContract {
    function deposit(
        bytes calldata pubkey,
        bytes calldata withdrawalCredentials,
        bytes calldata signature,
        bytes32 depositDataRoot
    ) external payable;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

interface IFeeDispatcher {
    function dispatch(bytes32 _publicKeyRoot) external payable;

    function getWithdrawer(bytes32 _publicKeyRoot) external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

interface IFeeRecipient {
    function init(address _dispatcher, bytes32 _publicKeyRoot) external;

    function withdraw() external;
}

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

interface IStakingContractFeeDetails {
    function getWithdrawerFromPublicKeyRoot(bytes32 _publicKeyRoot) external view returns (address);

    function getTreasury() external view returns (address);

    function getOperatorFeeRecipient(bytes32 pubKeyRoot) external view returns (address);

    function getGlobalFee() external view returns (uint256);

    function getOperatorFee() external view returns (uint256);

    function getExitRequestedFromRoot(bytes32 _publicKeyRoot) external view returns (bool);

    function getWithdrawnFromPublicKeyRoot(bytes32 _publicKeyRoot) external view returns (bool);

    function toggleWithdrawnFromPublicKeyRoot(bytes32 _publicKeyRoot) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/Proxy.sol)

pragma solidity ^0.8.0;

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

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

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

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

    /**
     * @dev This is a virtual function that should be overriden 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 internall call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _beforeFallback();
        _delegate(_implementation());
    }

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

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

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

//SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.10;

import "./libs/BytesLib.sol";
import "./interfaces/IFeeRecipient.sol";
import "./interfaces/IDepositContract.sol";
import "./libs/StakingContractStorageLib.sol";
import "@openzeppelin/contracts/proxy/Clones.sol";

/// @title Ethereum Staking Contract
/// @author Kiln
/// @notice You can use this contract to store validator keys and have users fund them and trigger deposits.
contract StakingContract {
    using StakingContractStorageLib for bytes32;

    uint256 internal constant EXECUTION_LAYER_SALT_PREFIX = 0;
    uint256 internal constant CONSENSUS_LAYER_SALT_PREFIX = 1;
    uint256 public constant SIGNATURE_LENGTH = 96;
    uint256 public constant PUBLIC_KEY_LENGTH = 48;
    uint256 public constant DEPOSIT_SIZE = 32 ether;
    // this is the equivalent of Uint256Lib.toLittleEndian64(DEPOSIT_SIZE / 1000000000 wei);
    uint256 constant DEPOSIT_SIZE_AMOUNT_LITTLEENDIAN64 =
        0x0040597307000000000000000000000000000000000000000000000000000000;
    uint256 internal constant BASIS_POINTS = 10_000;
    uint256 internal constant WITHDRAWAL_CREDENTIAL_PREFIX_01 =
        0x0100000000000000000000000000000000000000000000000000000000000000;

    error Forbidden();
    error InvalidFee();
    error Deactivated();
    error NoOperators();
    error InvalidCall();
    error Unauthorized();
    error DepositFailure();
    error DepositsStopped();
    error InvalidArgument();
    error UnsortedIndexes();
    error InvalidPublicKeys();
    error InvalidSignatures();
    error InvalidWithdrawer();
    error InvalidZeroAddress();
    error AlreadyInitialized();
    error InvalidDepositValue();
    error NotEnoughValidators();
    error InvalidValidatorCount();
    error DuplicateValidatorKey(bytes);
    error FundedValidatorDeletionAttempt();
    error OperatorLimitTooHigh(uint256 limit, uint256 keyCount);
    error MaximumOperatorCountAlreadyReached();
    error LastEditAfterSnapshot();
    error PublicKeyNotInContract();

    struct ValidatorAllocationCache {
        bool used;
        uint8 operatorIndex;
        uint32 funded;
        uint32 toDeposit;
        uint32 available;
    }

    event Deposit(address indexed caller, address indexed withdrawer, bytes publicKey, bytes signature);
    event ValidatorKeysAdded(uint256 indexed operatorIndex, bytes publicKeys, bytes signatures);
    event ValidatorKeyRemoved(uint256 indexed operatorIndex, bytes publicKey);
    event ChangedWithdrawer(bytes publicKey, address newWithdrawer);
    event ChangedOperatorLimit(uint256 operatorIndex, uint256 limit);
    event ChangedTreasury(address newTreasury);
    event ChangedGlobalFee(uint256 newGlobalFee);
    event ChangedOperatorFee(uint256 newOperatorFee);
    event ChangedAdmin(address newAdmin);
    event ChangedDepositsStopped(bool isStopped);
    event NewOperator(address operatorAddress, address feeRecipientAddress, uint256 index);
    event ChangedOperatorAddresses(uint256 operatorIndex, address operatorAddress, address feeRecipientAddress);
    event DeactivatedOperator(uint256 _operatorIndex);
    event ActivatedOperator(uint256 _operatorIndex);
    event SetWithdrawerCustomizationStatus(bool _status);
    event ExitRequest(address caller, bytes pubkey);
    event ValidatorsEdited(uint256 blockNumber);

    /// @notice Ensures an initialisation call has been called only once per _version value
    /// @param _version The current initialisation value
    modifier init(uint256 _version) {
        if (_version != StakingContractStorageLib.getVersion() + 1) {
            revert AlreadyInitialized();
        }

        StakingContractStorageLib.setVersion(_version);
        _;
    }

    /// @notice Ensures that the caller is the admin
    modifier onlyAdmin() {
        if (msg.sender != StakingContractStorageLib.getAdmin()) {
            revert Unauthorized();
        }

        _;
    }

    /// @notice Ensures that the caller is the admin or the operator
    modifier onlyActiveOperatorOrAdmin(uint256 _operatorIndex) {
        if (msg.sender == StakingContractStorageLib.getAdmin()) {
            _;
        } else {
            _onlyActiveOperator(_operatorIndex);
            _;
        }
    }

    /// @notice Ensures that the caller is the admin
    modifier onlyActiveOperator(uint256 _operatorIndex) {
        _onlyActiveOperator(_operatorIndex);
        _;
    }

    /// @notice Ensures that the caller is the operator fee recipient
    modifier onlyActiveOperatorFeeRecipient(uint256 _operatorIndex) {
        StakingContractStorageLib.OperatorInfo storage operatorInfo = StakingContractStorageLib.getOperators().value[
            _operatorIndex
        ];

        if (operatorInfo.deactivated) {
            revert Deactivated();
        }

        if (msg.sender != operatorInfo.feeRecipient) {
            revert Unauthorized();
        }

        _;
    }

    /// @notice Explicit deposit method using msg.sender
    /// @dev A multiple of 32 ETH should be sent
    function deposit() external payable {
        _deposit();
    }

    /// @notice Implicit deposit method
    /// @dev A multiple of 32 ETH should be sent
    /// @dev The withdrawer is set to the message sender address
    receive() external payable {
        _deposit();
    }

    /// @notice Fallback detection
    /// @dev Fails on any call that fallbacks
    fallback() external payable {
        revert InvalidCall();
    }

    function initialize_1(
        address _admin,
        address _treasury,
        address _depositContract,
        address _elDispatcher,
        address _clDispatcher,
        address _feeRecipientImplementation,
        uint256 _globalFee,
        uint256 _operatorFee,
        uint256 globalCommissionLimitBPS,
        uint256 operatorCommissionLimitBPS
    ) external init(1) {
        _checkAddress(_admin);
        StakingContractStorageLib.setAdmin(_admin);
        _checkAddress(_treasury);
        StakingContractStorageLib.setTreasury(_treasury);

        if (_globalFee > BASIS_POINTS) {
            revert InvalidFee();
        }
        StakingContractStorageLib.setGlobalFee(_globalFee);
        if (_operatorFee > BASIS_POINTS) {
            revert InvalidFee();
        }
        StakingContractStorageLib.setOperatorFee(_operatorFee);

        _checkAddress(_elDispatcher);
        StakingContractStorageLib.setELDispatcher(_elDispatcher);
        _checkAddress(_clDispatcher);
        StakingContractStorageLib.setCLDispatcher(_clDispatcher);
        _checkAddress(_depositContract);
        StakingContractStorageLib.setDepositContract(_depositContract);
        _checkAddress(_feeRecipientImplementation);
        StakingContractStorageLib.setFeeRecipientImplementation(_feeRecipientImplementation);
        initialize_2(globalCommissionLimitBPS, operatorCommissionLimitBPS);
    }

    function initialize_2(uint256 globalCommissionLimitBPS, uint256 operatorCommissionLimitBPS) public init(2) {
        if (globalCommissionLimitBPS > BASIS_POINTS) {
            revert InvalidFee();
        }
        StakingContractStorageLib.setGlobalCommissionLimit(globalCommissionLimitBPS);
        if (operatorCommissionLimitBPS > BASIS_POINTS) {
            revert InvalidFee();
        }
        StakingContractStorageLib.setOperatorCommissionLimit(operatorCommissionLimitBPS);
    }

    /// @notice Changes the behavior of the withdrawer customization logic
    /// @param _enabled True to allow users to customize the withdrawer
    function setWithdrawerCustomizationEnabled(bool _enabled) external onlyAdmin {
        StakingContractStorageLib.setWithdrawerCustomizationEnabled(_enabled);
        emit SetWithdrawerCustomizationStatus(_enabled);
    }

    /// @notice Retrieve system admin
    function getAdmin() external view returns (address) {
        return StakingContractStorageLib.getAdmin();
    }

    /// @notice Set new treasury
    /// @dev Only callable by admin
    /// @param _newTreasury New Treasury address
    function setTreasury(address _newTreasury) external onlyAdmin {
        emit ChangedTreasury(_newTreasury);
        StakingContractStorageLib.setTreasury(_newTreasury);
    }

    /// @notice Retrieve system treasury
    function getTreasury() external view returns (address) {
        return StakingContractStorageLib.getTreasury();
    }

    /// @notice Retrieve the global fee
    function getGlobalFee() external view returns (uint256) {
        return StakingContractStorageLib.getGlobalFee();
    }

    /// @notice Retrieve the operator fee
    function getOperatorFee() external view returns (uint256) {
        return StakingContractStorageLib.getOperatorFee();
    }

    /// @notice Compute the Execution Layer Fee recipient address for a given validator public key
    /// @param _publicKey Validator to get the recipient
    function getELFeeRecipient(bytes calldata _publicKey) external view returns (address) {
        return _getDeterministicReceiver(_publicKey, EXECUTION_LAYER_SALT_PREFIX);
    }

    /// @notice Compute the Consensus Layer Fee recipient address for a given validator public key
    /// @param _publicKey Validator to get the recipient
    function getCLFeeRecipient(bytes calldata _publicKey) external view returns (address) {
        return _getDeterministicReceiver(_publicKey, CONSENSUS_LAYER_SALT_PREFIX);
    }

    /// @notice Retrieve the Execution & Consensus Layer Fee operator recipient for a given public key
    function getOperatorFeeRecipient(bytes32 pubKeyRoot) external view returns (address) {
        if (StakingContractStorageLib.getOperatorIndexPerValidator().value[pubKeyRoot].enabled == false) {
            revert PublicKeyNotInContract();
        }
        return
            StakingContractStorageLib
                .getOperators()
                .value[StakingContractStorageLib.getOperatorIndexPerValidator().value[pubKeyRoot].operatorIndex]
                .feeRecipient;
    }

    /// @notice Retrieve withdrawer of public key
    /// @notice In case the validator is not enabled, it will return address(0)
    /// @param _publicKey Public Key to check
    function getWithdrawer(bytes calldata _publicKey) external view returns (address) {
        return _getWithdrawer(_getPubKeyRoot(_publicKey));
    }

    /// @notice Retrieve withdrawer of public key root
    /// @notice In case the validator is not enabled, it will return address(0)
    /// @param _publicKeyRoot Hash of the public key
    function getWithdrawerFromPublicKeyRoot(bytes32 _publicKeyRoot) external view returns (address) {
        return _getWithdrawer(_publicKeyRoot);
    }

    /// @notice Retrieve whether the validator exit has been requested
    /// @notice In case the validator is not enabled, it will return false
    /// @param _publicKeyRoot Public Key Root to check
    function getExitRequestedFromRoot(bytes32 _publicKeyRoot) external view returns (bool) {
        return _getExitRequest(_publicKeyRoot);
    }

    /// @notice Return true if the validator already went through the exit logic
    /// @notice In case the validator is not enabled, it will return false
    /// @param _publicKeyRoot Public Key Root of the validator
    function getWithdrawnFromPublicKeyRoot(bytes32 _publicKeyRoot) external view returns (bool) {
        return StakingContractStorageLib.getWithdrawnMap().value[_publicKeyRoot];
    }

    /// @notice Retrieve the enabled status of public key root, true if the key is in the contract
    /// @param _publicKeyRoot Hash of the public key
    function getEnabledFromPublicKeyRoot(bytes32 _publicKeyRoot) external view returns (bool) {
        return StakingContractStorageLib.getOperatorIndexPerValidator().value[_publicKeyRoot].enabled;
    }

    /// @notice Allows the CLDispatcher to signal a validator went through the exit logic
    /// @param _publicKeyRoot Public Key Root of the validator
    function toggleWithdrawnFromPublicKeyRoot(bytes32 _publicKeyRoot) external {
        if (msg.sender != StakingContractStorageLib.getCLDispatcher()) {
            revert Unauthorized();
        }
        StakingContractStorageLib.getWithdrawnMap().value[_publicKeyRoot] = true;
    }

    /// @notice Returns false if the users can deposit, true if deposits are stopped
    function getDepositsStopped() external view returns (bool) {
        return StakingContractStorageLib.getDepositStopped();
    }

    /// @notice Retrieve operator details
    /// @param _operatorIndex Operator index
    function getOperator(uint256 _operatorIndex)
        external
        view
        returns (
            address operatorAddress,
            address feeRecipientAddress,
            uint256 limit,
            uint256 keys,
            uint256 funded,
            uint256 available,
            bool deactivated
        )
    {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        if (_operatorIndex < operators.value.length) {
            StakingContractStorageLib.ValidatorsFundingInfo memory _operatorInfo = StakingContractStorageLib
                .getValidatorsFundingInfo(_operatorIndex);
            StakingContractStorageLib.OperatorInfo storage _operator = operators.value[_operatorIndex];

            (operatorAddress, feeRecipientAddress, limit, keys, deactivated) = (
                _operator.operator,
                _operator.feeRecipient,
                _operator.limit,
                _operator.publicKeys.length,
                _operator.deactivated
            );
            (funded, available) = (_operatorInfo.funded, _operatorInfo.availableKeys);
        }
    }

    /// @notice Get details about a validator
    /// @param _operatorIndex Index of the operator running the validator
    /// @param _validatorIndex Index of the validator
    function getValidator(uint256 _operatorIndex, uint256 _validatorIndex)
        external
        view
        returns (
            bytes memory publicKey,
            bytes memory signature,
            address withdrawer,
            bool funded
        )
    {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        publicKey = operators.value[_operatorIndex].publicKeys[_validatorIndex];
        signature = operators.value[_operatorIndex].signatures[_validatorIndex];
        withdrawer = _getWithdrawer(_getPubKeyRoot(publicKey));
        funded = _validatorIndex < StakingContractStorageLib.getValidatorsFundingInfo(_operatorIndex).funded;
    }

    /// @notice Get the total available keys that are ready to be used for deposits
    function getAvailableValidatorCount() external view returns (uint256) {
        return StakingContractStorageLib.getTotalAvailableValidators();
    }

    /// @notice Set new admin
    /// @dev Only callable by admin
    /// @param _newAdmin New Administrator address
    function transferOwnership(address _newAdmin) external onlyAdmin {
        StakingContractStorageLib.setPendingAdmin(_newAdmin);
    }

    /// @notice New admin must accept its role by calling this method
    /// @dev Only callable by new admin
    function acceptOwnership() external {
        address newAdmin = StakingContractStorageLib.getPendingAdmin();

        if (msg.sender != newAdmin) {
            revert Unauthorized();
        }
        StakingContractStorageLib.setAdmin(newAdmin);
        StakingContractStorageLib.setPendingAdmin(address(0));
        emit ChangedAdmin(newAdmin);
    }

    /// @notice Get the new admin's address previously set for an ownership transfer
    function getPendingAdmin() external view returns (address) {
        return StakingContractStorageLib.getPendingAdmin();
    }

    /// @notice Add new operator
    /// @dev Only callable by admin
    /// @param _operatorAddress Operator address allowed to add / remove validators
    /// @param _feeRecipientAddress Privileged operator address used to manage rewards and operator addresses
    function addOperator(address _operatorAddress, address _feeRecipientAddress) external onlyAdmin returns (uint256) {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        StakingContractStorageLib.OperatorInfo memory newOperator;

        if (operators.value.length == 1) {
            revert MaximumOperatorCountAlreadyReached();
        }
        newOperator.operator = _operatorAddress;
        newOperator.feeRecipient = _feeRecipientAddress;
        operators.value.push(newOperator);
        uint256 operatorIndex = operators.value.length - 1;
        emit NewOperator(_operatorAddress, _feeRecipientAddress, operatorIndex);
        return operatorIndex;
    }

    /// @notice Set new operator addresses (operations and reward management)
    /// @dev Only callable by fee recipient address manager
    /// @param _operatorIndex Index of the operator to update
    /// @param _operatorAddress New operator address for operations management
    /// @param _feeRecipientAddress New operator address for reward management
    function setOperatorAddresses(
        uint256 _operatorIndex,
        address _operatorAddress,
        address _feeRecipientAddress
    ) external onlyActiveOperatorFeeRecipient(_operatorIndex) {
        _checkAddress(_operatorAddress);
        _checkAddress(_feeRecipientAddress);
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();

        operators.value[_operatorIndex].operator = _operatorAddress;
        operators.value[_operatorIndex].feeRecipient = _feeRecipientAddress;
        emit ChangedOperatorAddresses(_operatorIndex, _operatorAddress, _feeRecipientAddress);
    }

    /// @notice Set withdrawer for public key
    /// @dev Only callable by current public key withdrawer
    /// @param _publicKey Public key to change withdrawer
    /// @param _newWithdrawer New withdrawer address
    function setWithdrawer(bytes calldata _publicKey, address _newWithdrawer) external {
        if (!StakingContractStorageLib.getWithdrawerCustomizationEnabled()) {
            revert Forbidden();
        }
        _checkAddress(_newWithdrawer);
        bytes32 pubkeyRoot = _getPubKeyRoot(_publicKey);
        StakingContractStorageLib.WithdrawersSlot storage withdrawers = StakingContractStorageLib.getWithdrawers();

        if (withdrawers.value[pubkeyRoot] != msg.sender) {
            revert Unauthorized();
        }

        emit ChangedWithdrawer(_publicKey, _newWithdrawer);

        withdrawers.value[pubkeyRoot] = _newWithdrawer;
    }

    /// @notice Set operator staking limits
    /// @dev Only callable by admin
    /// @dev Limit should not exceed the validator key count of the operator
    /// @dev Keys should be registered before limit is increased
    /// @dev Allows all keys to be verified by the system admin before limit is increased
    /// @param _operatorIndex Operator Index
    /// @param _limit New staking limit
    /// @param _snapshot Block number at which verification was done
    function setOperatorLimit(
        uint256 _operatorIndex,
        uint256 _limit,
        uint256 _snapshot
    ) external onlyAdmin {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        if (operators.value[_operatorIndex].deactivated) {
            revert Deactivated();
        }
        uint256 publicKeyCount = operators.value[_operatorIndex].publicKeys.length;
        if (publicKeyCount < _limit) {
            revert OperatorLimitTooHigh(_limit, publicKeyCount);
        }
        if (
            operators.value[_operatorIndex].limit < _limit &&
            StakingContractStorageLib.getLastValidatorEdit() > _snapshot
        ) {
            revert LastEditAfterSnapshot();
        }
        operators.value[_operatorIndex].limit = _limit;
        _updateAvailableValidatorCount(_operatorIndex);
        emit ChangedOperatorLimit(_operatorIndex, _limit);
    }

    /// @notice Deactivates an operator and changes the fee recipient address and the staking limit
    /// @param _operatorIndex Operator Index
    /// @param _temporaryFeeRecipient Temporary address to receive funds decided by the system admin
    function deactivateOperator(uint256 _operatorIndex, address _temporaryFeeRecipient) external onlyAdmin {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        operators.value[_operatorIndex].limit = 0;
        emit ChangedOperatorLimit(_operatorIndex, 0);
        operators.value[_operatorIndex].deactivated = true;
        emit DeactivatedOperator(_operatorIndex);
        operators.value[_operatorIndex].feeRecipient = _temporaryFeeRecipient;
        emit ChangedOperatorAddresses(_operatorIndex, operators.value[_operatorIndex].operator, _temporaryFeeRecipient);
        _updateAvailableValidatorCount(_operatorIndex);
    }

    /// @notice Activates an operator, without changing its 0 staking limit
    /// @param _operatorIndex Operator Index
    /// @param _newFeeRecipient Sets the fee recipient address
    function activateOperator(uint256 _operatorIndex, address _newFeeRecipient) external onlyAdmin {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        operators.value[_operatorIndex].deactivated = false;
        emit ActivatedOperator(_operatorIndex);
        operators.value[_operatorIndex].feeRecipient = _newFeeRecipient;
        emit ChangedOperatorAddresses(_operatorIndex, operators.value[_operatorIndex].operator, _newFeeRecipient);
    }

    /// @notice Change the Operator fee
    /// @param _operatorFee Fee in Basis Point
    function setOperatorFee(uint256 _operatorFee) external onlyAdmin {
        if (_operatorFee > StakingContractStorageLib.getOperatorCommissionLimit()) {
            revert InvalidFee();
        }
        StakingContractStorageLib.setOperatorFee(_operatorFee);
        emit ChangedOperatorFee(_operatorFee);
    }

    /// @notice Change the Global fee
    /// @param _globalFee Fee in Basis Point
    function setGlobalFee(uint256 _globalFee) external onlyAdmin {
        if (_globalFee > StakingContractStorageLib.getGlobalCommissionLimit()) {
            revert InvalidFee();
        }
        StakingContractStorageLib.setGlobalFee(_globalFee);
        emit ChangedGlobalFee(_globalFee);
    }

    /// @notice Add new validator public keys and signatures
    /// @dev Only callable by operator
    /// @param _operatorIndex Operator Index
    /// @param _keyCount Number of keys added
    /// @param _publicKeys Concatenated _keyCount public keys
    /// @param _signatures Concatenated _keyCount signatures
    function addValidators(
        uint256 _operatorIndex,
        uint256 _keyCount,
        bytes calldata _publicKeys,
        bytes calldata _signatures
    ) external onlyActiveOperator(_operatorIndex) {
        if (_keyCount == 0) {
            revert InvalidArgument();
        }

        if (_publicKeys.length % PUBLIC_KEY_LENGTH != 0 || _publicKeys.length / PUBLIC_KEY_LENGTH != _keyCount) {
            revert InvalidPublicKeys();
        }

        if (_signatures.length % SIGNATURE_LENGTH != 0 || _signatures.length / SIGNATURE_LENGTH != _keyCount) {
            revert InvalidSignatures();
        }

        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        StakingContractStorageLib.OperatorIndexPerValidatorSlot
            storage operatorIndexPerValidator = StakingContractStorageLib.getOperatorIndexPerValidator();

        for (uint256 i; i < _keyCount; ) {
            bytes memory publicKey = BytesLib.slice(_publicKeys, i * PUBLIC_KEY_LENGTH, PUBLIC_KEY_LENGTH);
            bytes memory signature = BytesLib.slice(_signatures, i * SIGNATURE_LENGTH, SIGNATURE_LENGTH);

            operators.value[_operatorIndex].publicKeys.push(publicKey);
            operators.value[_operatorIndex].signatures.push(signature);

            bytes32 pubKeyRoot = _getPubKeyRoot(publicKey);

            if (operatorIndexPerValidator.value[pubKeyRoot].enabled) {
                revert DuplicateValidatorKey(publicKey);
            }

            operatorIndexPerValidator.value[pubKeyRoot] = StakingContractStorageLib.OperatorIndex({
                enabled: true,
                operatorIndex: uint32(_operatorIndex)
            });

            unchecked {
                ++i;
            }
        }

        emit ValidatorKeysAdded(_operatorIndex, _publicKeys, _signatures);
        _updateLastValidatorsEdit();
        _updateAvailableValidatorCount(_operatorIndex);
    }

    /// @notice Remove unfunded validators
    /// @dev Only callable by operator
    /// @dev Indexes should be provided in decreasing order
    /// @dev The limit will be set to the lowest removed operator index to ensure all changes above the
    ///      lowest removed validator key are verified by the system administrator
    /// @param _operatorIndex Operator Index
    /// @param _indexes List of indexes to delete, in decreasing order
    function removeValidators(uint256 _operatorIndex, uint256[] calldata _indexes)
        external
        onlyActiveOperatorOrAdmin(_operatorIndex)
    {
        if (_indexes.length == 0) {
            revert InvalidArgument();
        }

        StakingContractStorageLib.ValidatorsFundingInfo memory operatorInfo = StakingContractStorageLib
            .getValidatorsFundingInfo(_operatorIndex);
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        StakingContractStorageLib.OperatorIndexPerValidatorSlot
            storage operatorIndexPerValidator = StakingContractStorageLib.getOperatorIndexPerValidator();

        if (_indexes[_indexes.length - 1] < operatorInfo.funded) {
            revert FundedValidatorDeletionAttempt();
        }
        for (uint256 i; i < _indexes.length; ) {
            if (i > 0 && _indexes[i] >= _indexes[i - 1]) {
                revert UnsortedIndexes();
            }

            bytes32 pubKeyRoot = _getPubKeyRoot(operators.value[_operatorIndex].publicKeys[_indexes[i]]);
            operatorIndexPerValidator.value[pubKeyRoot].enabled = false;
            operatorIndexPerValidator.value[pubKeyRoot].operatorIndex = 0;

            emit ValidatorKeyRemoved(_operatorIndex, operators.value[_operatorIndex].publicKeys[_indexes[i]]);
            if (_indexes[i] == operators.value[_operatorIndex].publicKeys.length - 1) {
                operators.value[_operatorIndex].publicKeys.pop();
                operators.value[_operatorIndex].signatures.pop();
            } else {
                operators.value[_operatorIndex].publicKeys[_indexes[i]] = operators.value[_operatorIndex].publicKeys[
                    operators.value[_operatorIndex].publicKeys.length - 1
                ];
                operators.value[_operatorIndex].publicKeys.pop();
                operators.value[_operatorIndex].signatures[_indexes[i]] = operators.value[_operatorIndex].signatures[
                    operators.value[_operatorIndex].signatures.length - 1
                ];
                operators.value[_operatorIndex].signatures.pop();
            }

            unchecked {
                ++i;
            }
        }

        if (_indexes[_indexes.length - 1] < operators.value[_operatorIndex].limit) {
            operators.value[_operatorIndex].limit = _indexes[_indexes.length - 1];
            emit ChangedOperatorLimit(_operatorIndex, _indexes[_indexes.length - 1]);
        }

        _updateLastValidatorsEdit();
        _updateAvailableValidatorCount(_operatorIndex);
    }

    /// @notice Withdraw the Execution Layer Fee for given validators public keys
    /// @dev Funds are sent to the withdrawer account
    /// @dev This method is public on purpose
    /// @param _publicKeys Validators to withdraw Execution Layer Fees from
    function batchWithdrawELFee(bytes calldata _publicKeys) external {
        if (_publicKeys.length % PUBLIC_KEY_LENGTH != 0) {
            revert InvalidPublicKeys();
        }
        for (uint256 i = 0; i < _publicKeys.length; ) {
            bytes memory publicKey = BytesLib.slice(_publicKeys, i, PUBLIC_KEY_LENGTH);
            _onlyWithdrawerOrAdmin(publicKey);
            _deployAndWithdraw(publicKey, EXECUTION_LAYER_SALT_PREFIX, StakingContractStorageLib.getELDispatcher());
            unchecked {
                i += PUBLIC_KEY_LENGTH;
            }
        }
    }

    /// @notice Withdraw the Consensus Layer Fee for given validators public keys
    /// @dev Funds are sent to the withdrawer account
    /// @dev This method is public on purpose
    /// @param _publicKeys Validators to withdraw Consensus Layer Fees from
    function batchWithdrawCLFee(bytes calldata _publicKeys) external {
        if (_publicKeys.length % PUBLIC_KEY_LENGTH != 0) {
            revert InvalidPublicKeys();
        }
        for (uint256 i = 0; i < _publicKeys.length; ) {
            bytes memory publicKey = BytesLib.slice(_publicKeys, i, PUBLIC_KEY_LENGTH);
            _onlyWithdrawerOrAdmin(publicKey);
            _deployAndWithdraw(publicKey, CONSENSUS_LAYER_SALT_PREFIX, StakingContractStorageLib.getCLDispatcher());
            unchecked {
                i += PUBLIC_KEY_LENGTH;
            }
        }
    }

    /// @notice Withdraw both Consensus and Execution Layer Fees for given validators public keys
    /// @dev Funds are sent to the withdrawer account
    /// @param _publicKeys Validators to withdraw fees from
    function batchWithdraw(bytes calldata _publicKeys) external {
        if (_publicKeys.length % PUBLIC_KEY_LENGTH != 0) {
            revert InvalidPublicKeys();
        }
        for (uint256 i = 0; i < _publicKeys.length; ) {
            bytes memory publicKey = BytesLib.slice(_publicKeys, i, PUBLIC_KEY_LENGTH);
            _onlyWithdrawerOrAdmin(publicKey);
            _deployAndWithdraw(publicKey, EXECUTION_LAYER_SALT_PREFIX, StakingContractStorageLib.getELDispatcher());
            _deployAndWithdraw(publicKey, CONSENSUS_LAYER_SALT_PREFIX, StakingContractStorageLib.getCLDispatcher());
            unchecked {
                i += PUBLIC_KEY_LENGTH;
            }
        }
    }

    /// @notice Withdraw the Execution Layer Fee for a given validator public key
    /// @dev Funds are sent to the withdrawer account
    /// @param _publicKey Validator to withdraw Execution Layer Fees from
    function withdrawELFee(bytes calldata _publicKey) external {
        _onlyWithdrawerOrAdmin(_publicKey);
        _deployAndWithdraw(_publicKey, EXECUTION_LAYER_SALT_PREFIX, StakingContractStorageLib.getELDispatcher());
    }

    /// @notice Withdraw the Consensus Layer Fee for a given validator public key
    /// @dev Funds are sent to the withdrawer account
    /// @param _publicKey Validator to withdraw Consensus Layer Fees from
    function withdrawCLFee(bytes calldata _publicKey) external {
        _onlyWithdrawerOrAdmin(_publicKey);
        _deployAndWithdraw(_publicKey, CONSENSUS_LAYER_SALT_PREFIX, StakingContractStorageLib.getCLDispatcher());
    }

    /// @notice Withdraw both Consensus and Execution Layer Fee for a given validator public key
    /// @dev Reverts if any is null
    /// @param _publicKey Validator to withdraw Execution and Consensus Layer Fees from
    function withdraw(bytes calldata _publicKey) external {
        _onlyWithdrawerOrAdmin(_publicKey);
        _deployAndWithdraw(_publicKey, EXECUTION_LAYER_SALT_PREFIX, StakingContractStorageLib.getELDispatcher());
        _deployAndWithdraw(_publicKey, CONSENSUS_LAYER_SALT_PREFIX, StakingContractStorageLib.getCLDispatcher());
    }

    function requestValidatorsExit(bytes calldata _publicKeys) external {
        if (_publicKeys.length % PUBLIC_KEY_LENGTH != 0) {
            revert InvalidPublicKeys();
        }
        for (uint256 i = 0; i < _publicKeys.length; ) {
            bytes memory publicKey = BytesLib.slice(_publicKeys, i, PUBLIC_KEY_LENGTH);
            bytes32 pubKeyRoot = _getPubKeyRoot(publicKey);
            address withdrawer = _getWithdrawer(pubKeyRoot);
            if (msg.sender != withdrawer) {
                revert Unauthorized();
            }
            _setExitRequest(pubKeyRoot, true);
            emit ExitRequest(withdrawer, publicKey);
            unchecked {
                i += PUBLIC_KEY_LENGTH;
            }
        }
    }

    /// @notice Utility to stop or allow deposits
    function setDepositsStopped(bool val) external onlyAdmin {
        emit ChangedDepositsStopped(val);
        StakingContractStorageLib.setDepositStopped(val);
    }

    /// ██ ███    ██ ████████ ███████ ██████  ███    ██  █████  ██
    /// ██ ████   ██    ██    ██      ██   ██ ████   ██ ██   ██ ██
    /// ██ ██ ██  ██    ██    █████   ██████  ██ ██  ██ ███████ ██
    /// ██ ██  ██ ██    ██    ██      ██   ██ ██  ██ ██ ██   ██ ██
    /// ██ ██   ████    ██    ███████ ██   ██ ██   ████ ██   ██ ███████

    function _onlyWithdrawerOrAdmin(bytes memory _publicKey) internal view {
        if (
            msg.sender != _getWithdrawer(_getPubKeyRoot(_publicKey)) &&
            StakingContractStorageLib.getAdmin() != msg.sender
        ) {
            revert InvalidWithdrawer();
        }
    }

    function _onlyActiveOperator(uint256 _operatorIndex) internal view {
        StakingContractStorageLib.OperatorInfo storage operatorInfo = StakingContractStorageLib.getOperators().value[
            _operatorIndex
        ];

        if (operatorInfo.deactivated) {
            revert Deactivated();
        }

        if (msg.sender != operatorInfo.operator) {
            revert Unauthorized();
        }
    }

    function _getPubKeyRoot(bytes memory _publicKey) internal pure returns (bytes32) {
        return sha256(abi.encodePacked(_publicKey, bytes16(0)));
    }

    function _getWithdrawer(bytes32 _publicKeyRoot) internal view returns (address) {
        return StakingContractStorageLib.getWithdrawers().value[_publicKeyRoot];
    }

    function _getExitRequest(bytes32 _publicKeyRoot) internal view returns (bool) {
        return StakingContractStorageLib.getExitRequestMap().value[_publicKeyRoot];
    }

    function _setExitRequest(bytes32 _publicKeyRoot, bool _value) internal {
        StakingContractStorageLib.getExitRequestMap().value[_publicKeyRoot] = _value;
    }

    function _updateAvailableValidatorCount(uint256 _operatorIndex) internal {
        StakingContractStorageLib.ValidatorsFundingInfo memory validatorFundingInfo = StakingContractStorageLib
            .getValidatorsFundingInfo(_operatorIndex);
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();

        uint32 oldAvailableCount = validatorFundingInfo.availableKeys;
        uint32 newAvailableCount = 0;
        uint256 cap = operators.value[_operatorIndex].limit;

        if (cap <= validatorFundingInfo.funded) {
            StakingContractStorageLib.setValidatorsFundingInfo(_operatorIndex, 0, validatorFundingInfo.funded);
        } else {
            newAvailableCount = uint32(cap - validatorFundingInfo.funded);
            StakingContractStorageLib.setValidatorsFundingInfo(
                _operatorIndex,
                newAvailableCount,
                validatorFundingInfo.funded
            );
        }

        if (oldAvailableCount != newAvailableCount) {
            StakingContractStorageLib.setTotalAvailableValidators(
                (StakingContractStorageLib.getTotalAvailableValidators() - oldAvailableCount) + newAvailableCount
            );
        }
    }

    function _updateLastValidatorsEdit() internal {
        StakingContractStorageLib.setLastValidatorEdit(block.number);
        emit ValidatorsEdited(block.number);
    }

    function _addressToWithdrawalCredentials(address _recipient) internal pure returns (bytes32) {
        return bytes32(uint256(uint160(_recipient)) + WITHDRAWAL_CREDENTIAL_PREFIX_01);
    }

    function _depositValidatorsOfOperator(uint256 _operatorIndex, uint256 _validatorCount) internal {
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        StakingContractStorageLib.OperatorInfo storage operator = operators.value[_operatorIndex];
        StakingContractStorageLib.ValidatorsFundingInfo memory vfi = StakingContractStorageLib.getValidatorsFundingInfo(
            _operatorIndex
        );

        for (uint256 i = vfi.funded; i < vfi.funded + _validatorCount; ) {
            bytes memory publicKey = operator.publicKeys[i];
            bytes memory signature = operator.signatures[i];
            address consensusLayerRecipient = _getDeterministicReceiver(publicKey, CONSENSUS_LAYER_SALT_PREFIX);
            bytes32 withdrawalCredentials = _addressToWithdrawalCredentials(consensusLayerRecipient);
            bytes32 pubkeyRoot = _getPubKeyRoot(publicKey);
            _depositValidator(publicKey, pubkeyRoot, signature, withdrawalCredentials);
            StakingContractStorageLib.getWithdrawers().value[pubkeyRoot] = msg.sender;
            emit Deposit(msg.sender, msg.sender, publicKey, signature);
            unchecked {
                ++i;
            }
        }

        StakingContractStorageLib.setValidatorsFundingInfo(
            _operatorIndex,
            uint32(vfi.availableKeys - _validatorCount),
            uint32(vfi.funded + _validatorCount)
        );
    }

    /// @notice Internal utility to deposit a public key, its signature and 32 ETH to the consensus layer
    /// @param _publicKey The Public Key to deposit
    /// @param _signature The Signature to deposit
    /// @param _withdrawalCredentials The Withdrawal Credentials to deposit
    function _depositValidator(
        bytes memory _publicKey,
        bytes32 _pubkeyRoot,
        bytes memory _signature,
        bytes32 _withdrawalCredentials
    ) internal {
        bytes32 signatureRoot = sha256(
            abi.encodePacked(
                sha256(BytesLib.slice(_signature, 0, 64)),
                sha256(abi.encodePacked(BytesLib.slice(_signature, 64, SIGNATURE_LENGTH - 64), bytes32(0)))
            )
        );

        bytes32 depositDataRoot = sha256(
            abi.encodePacked(
                sha256(abi.encodePacked(_pubkeyRoot, _withdrawalCredentials)),
                sha256(abi.encodePacked(DEPOSIT_SIZE_AMOUNT_LITTLEENDIAN64, signatureRoot))
            )
        );

        uint256 targetBalance = address(this).balance - DEPOSIT_SIZE;

        IDepositContract(StakingContractStorageLib.getDepositContract()).deposit{value: DEPOSIT_SIZE}(
            _publicKey,
            abi.encodePacked(_withdrawalCredentials),
            _signature,
            depositDataRoot
        );

        if (address(this).balance != targetBalance) {
            revert DepositFailure();
        }
    }

    function _depositOnOneOperator(uint256 _depositCount, uint256 _totalAvailableValidators) internal {
        StakingContractStorageLib.setTotalAvailableValidators(_totalAvailableValidators - _depositCount);
        _depositValidatorsOfOperator(0, _depositCount);
    }

    function _deposit() internal {
        if (StakingContractStorageLib.getDepositStopped()) {
            revert DepositsStopped();
        }
        if (msg.value == 0 || msg.value % DEPOSIT_SIZE != 0) {
            revert InvalidDepositValue();
        }
        uint256 totalAvailableValidators = StakingContractStorageLib.getTotalAvailableValidators();
        uint256 depositCount = msg.value / DEPOSIT_SIZE;
        if (depositCount > totalAvailableValidators) {
            revert NotEnoughValidators();
        }
        StakingContractStorageLib.OperatorsSlot storage operators = StakingContractStorageLib.getOperators();
        if (operators.value.length == 0) {
            revert NoOperators();
        }
        _depositOnOneOperator(depositCount, totalAvailableValidators);
    }

    function _min(uint256 _a, uint256 _b) internal pure returns (uint256) {
        if (_a < _b) {
            return _a;
        }
        return _b;
    }

    /// @notice Internal utility to compute the receiver deterministic address
    /// @param _publicKey Public Key assigned to the receiver
    /// @param _prefix Prefix used to generate multiple receivers per public key
    function _getDeterministicReceiver(bytes memory _publicKey, uint256 _prefix) internal view returns (address) {
        bytes32 publicKeyRoot = _getPubKeyRoot(_publicKey);
        bytes32 salt = sha256(abi.encodePacked(_prefix, publicKeyRoot));
        address implementation = StakingContractStorageLib.getFeeRecipientImplementation();
        return Clones.predictDeterministicAddress(implementation, salt);
    }

    /// @notice Internal utility to deploy and withdraw the fees from a receiver
    /// @param _publicKey Public Key assigned to the receiver
    /// @param _prefix Prefix used to generate multiple receivers per public key
    /// @param _dispatcher Address of the dispatcher contract
    function _deployAndWithdraw(
        bytes memory _publicKey,
        uint256 _prefix,
        address _dispatcher
    ) internal {
        bytes32 publicKeyRoot = _getPubKeyRoot(_publicKey);
        bytes32 feeRecipientSalt = sha256(abi.encodePacked(_prefix, publicKeyRoot));
        address implementation = StakingContractStorageLib.getFeeRecipientImplementation();
        address feeRecipientAddress = Clones.predictDeterministicAddress(implementation, feeRecipientSalt);
        if (feeRecipientAddress.code.length == 0) {
            Clones.cloneDeterministic(implementation, feeRecipientSalt);
            IFeeRecipient(feeRecipientAddress).init(_dispatcher, publicKeyRoot);
        }
        IFeeRecipient(feeRecipientAddress).withdraw();
    }

    function _checkAddress(address _address) internal pure {
        if (_address == address(0)) {
            revert InvalidZeroAddress();
        }
    }
}

//SPDX-License-Identifier: MIT
pragma solidity >=0.8.10;

library StakingContractStorageLib {
    function getUint256(bytes32 position) internal view returns (uint256 data) {
        assembly {
            data := sload(position)
        }
    }

    function setUint256(bytes32 position, uint256 data) internal {
        assembly {
            sstore(position, data)
        }
    }

    function getAddress(bytes32 position) internal view returns (address data) {
        assembly {
            data := sload(position)
        }
    }

    function setAddress(bytes32 position, address data) internal {
        assembly {
            sstore(position, data)
        }
    }

    function getBool(bytes32 position) internal view returns (bool data) {
        assembly {
            data := sload(position)
        }
    }

    function setBool(bytes32 position, bool data) internal {
        assembly {
            sstore(position, data)
        }
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant VERSION_SLOT = keccak256("StakingContract.version");

    function getVersion() internal view returns (uint256) {
        return getUint256(VERSION_SLOT);
    }

    function setVersion(uint256 _newVersion) internal {
        setUint256(VERSION_SLOT, _newVersion);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant ADMIN_SLOT = keccak256("StakingContract.admin");
    bytes32 internal constant PENDING_ADMIN_SLOT = keccak256("StakingContract.pendingAdmin");

    function getAdmin() internal view returns (address) {
        return getAddress(ADMIN_SLOT);
    }

    function setAdmin(address _newAdmin) internal {
        setAddress(ADMIN_SLOT, _newAdmin);
    }

    function getPendingAdmin() internal view returns (address) {
        return getAddress(PENDING_ADMIN_SLOT);
    }

    function setPendingAdmin(address _newPendingAdmin) internal {
        setAddress(PENDING_ADMIN_SLOT, _newPendingAdmin);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant TREASURY_SLOT = keccak256("StakingContract.treasury");

    function getTreasury() internal view returns (address) {
        return getAddress(TREASURY_SLOT);
    }

    function setTreasury(address _newTreasury) internal {
        setAddress(TREASURY_SLOT, _newTreasury);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant DEPOSIT_CONTRACT_SLOT = keccak256("StakingContract.depositContract");

    function getDepositContract() internal view returns (address) {
        return getAddress(DEPOSIT_CONTRACT_SLOT);
    }

    function setDepositContract(address _newDepositContract) internal {
        setAddress(DEPOSIT_CONTRACT_SLOT, _newDepositContract);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant OPERATORS_SLOT = keccak256("StakingContract.operators");

    struct OperatorInfo {
        address operator;
        address feeRecipient;
        uint256 limit;
        bytes[] publicKeys;
        bytes[] signatures;
        bool deactivated;
    }

    struct OperatorsSlot {
        OperatorInfo[] value;
    }

    function getOperators() internal pure returns (OperatorsSlot storage p) {
        bytes32 slot = OPERATORS_SLOT;
        assembly {
            p.slot := slot
        }
    }

    /* ========================================
    ===========================================
    =========================================*/

    /// Validator funding information is stored in a packed fashion
    /// We fit 4 vfi per storage slot.
    /// Each vfi is stored in 64 bits, with the following layout:
    /// 32 bits for the number of available keys
    /// 32 bits for the number of funded keys

    uint256 internal constant FUNDED_OFFSET = 32;

    bytes32 internal constant VALIDATORS_FUNDING_INFO_SLOT = keccak256("StakingContract.validatorsFundingInfo");

    struct ValidatorsFundingInfo {
        uint32 availableKeys;
        uint32 funded;
    }

    struct UintToUintMappingSlot {
        mapping(uint256 => uint256) value;
    }

    function getValidatorsFundingInfo(uint256 _index) internal view returns (ValidatorsFundingInfo memory vfi) {
        UintToUintMappingSlot storage p;
        bytes32 slot = VALIDATORS_FUNDING_INFO_SLOT;

        assembly {
            p.slot := slot
        }

        uint256 slotIndex = _index >> 2; // divide by 4
        uint256 innerIndex = (_index & 3) << 6; // modulo 4, multiply by 64
        uint256 value = p.value[slotIndex] >> innerIndex;
        vfi.availableKeys = uint32(value);
        vfi.funded = uint32(value >> FUNDED_OFFSET);
    }

    function setValidatorsFundingInfo(
        uint256 _index,
        uint32 _availableKeys,
        uint32 _funded
    ) internal {
        UintToUintMappingSlot storage p;
        bytes32 slot = VALIDATORS_FUNDING_INFO_SLOT;

        assembly {
            p.slot := slot
        }

        uint256 slotIndex = _index >> 2; // divide by 4
        uint256 innerIndex = (_index & 3) << 6; // modulo 4, multiply by 64
        p.value[slotIndex] =
            (p.value[slotIndex] & (~(uint256(0xFFFFFFFFFFFFFFFF) << innerIndex))) | // clear the bits we want to set
            ((uint256(_availableKeys) | (uint256(_funded) << FUNDED_OFFSET)) << innerIndex);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant TOTAL_AVAILABLE_VALIDATORS_SLOT = keccak256("StakingContract.totalAvailableValidators");

    function getTotalAvailableValidators() internal view returns (uint256) {
        return getUint256(TOTAL_AVAILABLE_VALIDATORS_SLOT);
    }

    function setTotalAvailableValidators(uint256 _newTotal) internal {
        setUint256(TOTAL_AVAILABLE_VALIDATORS_SLOT, _newTotal);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant WITHDRAWERS_SLOT = keccak256("StakingContract.withdrawers");

    struct WithdrawersSlot {
        mapping(bytes32 => address) value;
    }

    function getWithdrawers() internal pure returns (WithdrawersSlot storage p) {
        bytes32 slot = WITHDRAWERS_SLOT;
        assembly {
            p.slot := slot
        }
    }

    /* ========================================
    ===========================================
    =========================================*/

    struct OperatorIndex {
        bool enabled;
        uint32 operatorIndex;
    }

    struct OperatorIndexPerValidatorSlot {
        mapping(bytes32 => OperatorIndex) value;
    }

    bytes32 internal constant OPERATOR_INDEX_PER_VALIDATOR_SLOT =
        keccak256("StakingContract.operatorIndexPerValidator");

    function getOperatorIndexPerValidator() internal pure returns (OperatorIndexPerValidatorSlot storage p) {
        bytes32 slot = OPERATOR_INDEX_PER_VALIDATOR_SLOT;
        assembly {
            p.slot := slot
        }
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant GLOBAL_FEE_SLOT = keccak256("StakingContract.globalFee");

    function getGlobalFee() internal view returns (uint256) {
        return getUint256(GLOBAL_FEE_SLOT);
    }

    function setGlobalFee(uint256 _newTreasuryFee) internal {
        setUint256(GLOBAL_FEE_SLOT, _newTreasuryFee);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant OPERATOR_FEE_SLOT = keccak256("StakingContract.operatorFee");

    function getOperatorFee() internal view returns (uint256) {
        return getUint256(OPERATOR_FEE_SLOT);
    }

    function setOperatorFee(uint256 _newOperatorFee) internal {
        setUint256(OPERATOR_FEE_SLOT, _newOperatorFee);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant EL_DISPATCHER_SLOT = keccak256("StakingContract.executionLayerDispatcher");

    function getELDispatcher() internal view returns (address) {
        return getAddress(EL_DISPATCHER_SLOT);
    }

    function setELDispatcher(address _newElDispatcher) internal {
        setAddress(EL_DISPATCHER_SLOT, _newElDispatcher);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant CL_DISPATCHER_SLOT = keccak256("StakingContract.consensusLayerDispatcher");

    function getCLDispatcher() internal view returns (address) {
        return getAddress(CL_DISPATCHER_SLOT);
    }

    function setCLDispatcher(address _newClDispatcher) internal {
        setAddress(CL_DISPATCHER_SLOT, _newClDispatcher);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant FEE_RECIPIENT_IMPLEMENTATION_SLOT =
        keccak256("StakingContract.feeRecipientImplementation");

    function getFeeRecipientImplementation() internal view returns (address) {
        return getAddress(FEE_RECIPIENT_IMPLEMENTATION_SLOT);
    }

    function setFeeRecipientImplementation(address _newFeeRecipientImplementation) internal {
        setAddress(FEE_RECIPIENT_IMPLEMENTATION_SLOT, _newFeeRecipientImplementation);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant WITHDRAWER_CUSTOMIZATION_ENABLED_SLOT =
        keccak256("StakingContract.withdrawerCustomizationEnabled");

    function getWithdrawerCustomizationEnabled() internal view returns (bool) {
        return getBool(WITHDRAWER_CUSTOMIZATION_ENABLED_SLOT);
    }

    function setWithdrawerCustomizationEnabled(bool _enabled) internal {
        setBool(WITHDRAWER_CUSTOMIZATION_ENABLED_SLOT, _enabled);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant EXIT_REQUEST_MAPPING_SLOT =
        bytes32(uint256(keccak256("StakingContract.exitRequest")) - 1);

    struct ExitRequestMap {
        mapping(bytes32 => bool) value;
    }

    function getExitRequestMap() internal pure returns (ExitRequestMap storage p) {
        bytes32 slot = EXIT_REQUEST_MAPPING_SLOT;
        assembly {
            p.slot := slot
        }
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant WITHDRAWN_MAPPING_SLOT = bytes32(uint256(keccak256("StakingContract.withdrawn")) - 1);

    struct WithdrawnMap {
        mapping(bytes32 => bool) value;
    }

    function getWithdrawnMap() internal pure returns (WithdrawnMap storage p) {
        bytes32 slot = WITHDRAWN_MAPPING_SLOT;
        assembly {
            p.slot := slot
        }
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant GLOBAL_COMMISSION_LIMIT_SLOT =
        bytes32(uint256(keccak256("StakingContract.globalCommissionLimit")) - 1);

    function getGlobalCommissionLimit() internal view returns (uint256) {
        return getUint256(GLOBAL_COMMISSION_LIMIT_SLOT);
    }

    function setGlobalCommissionLimit(uint256 value) internal {
        setUint256(GLOBAL_COMMISSION_LIMIT_SLOT, value);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant OPERATOR_COMMISSION_LIMIT_SLOT =
        bytes32(uint256(keccak256("StakingContract.operatorCommissionLimit")) - 1);

    function getOperatorCommissionLimit() internal view returns (uint256) {
        return getUint256(OPERATOR_COMMISSION_LIMIT_SLOT);
    }

    function setOperatorCommissionLimit(uint256 value) internal {
        setUint256(OPERATOR_COMMISSION_LIMIT_SLOT, value);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant DEPOSIT_STOPPED_SLOT = bytes32(uint256(keccak256("StakingContract.depositStopped")) - 1);

    function getDepositStopped() internal view returns (bool) {
        return getBool(DEPOSIT_STOPPED_SLOT);
    }

    function setDepositStopped(bool val) internal {
        setBool(DEPOSIT_STOPPED_SLOT, val);
    }

    /* ========================================
    ===========================================
    =========================================*/

    bytes32 internal constant LAST_VALIDATOR_EDIT_SLOT =
        bytes32(uint256(keccak256("StakingContract.lastValidatorsEdit")) - 1);

    function getLastValidatorEdit() internal view returns (uint256) {
        return getUint256(LAST_VALIDATOR_EDIT_SLOT);
    }

    function setLastValidatorEdit(uint256 value) internal {
        setUint256(LAST_VALIDATOR_EDIT_SLOT, value);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

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

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

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

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

//SPDX-License-Identifier: BUSL-1.1
pragma solidity >=0.8.10;

import "@openzeppelin/contracts/proxy/transparent/TransparentUpgradeableProxy.sol";

/// @title TUPProxy (Transparent Upgradeable Pausable Proxy)
/// @author SkillZ
/// @notice This contract extends the Transparent Upgradeable proxy and adds a system wide pause feature.
///         When the system is paused, the fallback will fail no matter what calls are made.
contract TUPProxy is TransparentUpgradeableProxy {
    bytes32 private constant _PAUSE_SLOT = bytes32(uint256(keccak256("eip1967.proxy.pause")) - 1);

    error CallWhenPaused();

    constructor(
        address _logic,
        address admin_,
        bytes memory _data
    ) payable TransparentUpgradeableProxy(_logic, admin_, _data) {}

    /// @dev Retrieves Paused state
    /// @return Paused state
    function isPaused() external ifAdmin returns (bool) {
        return StorageSlot.getBooleanSlot(_PAUSE_SLOT).value;
    }

    /// @dev Pauses system
    function pause() external ifAdmin {
        StorageSlot.getBooleanSlot(_PAUSE_SLOT).value = true;
    }

    /// @dev Unpauses system
    function unpause() external ifAdmin {
        StorageSlot.getBooleanSlot(_PAUSE_SLOT).value = false;
    }

    /// @dev Overrides the fallback method to check if system is not paused before
    /// @dev Address Zero is allowed to perform calls even if system is paused. This allows
    /// view functions to be called when the system is paused as rpc providers can easily
    /// set the sender address to zero.
    function _beforeFallback() internal override {
        if (StorageSlot.getBooleanSlot(_PAUSE_SLOT).value == false || msg.sender == address(0)) {
            super._beforeFallback();
        } else {
            revert CallWhenPaused();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/transparent/TransparentUpgradeableProxy.sol)

pragma solidity ^0.8.0;

import "../ERC1967/ERC1967Proxy.sol";

/**
 * @dev This contract implements a proxy that is upgradeable by an admin.
 *
 * To avoid https://medium.com/nomic-labs-blog/malicious-backdoors-in-ethereum-proxies-62629adf3357[proxy selector
 * clashing], which can potentially be used in an attack, this contract uses the
 * https://blog.openzeppelin.com/the-transparent-proxy-pattern/[transparent proxy pattern]. This pattern implies two
 * things that go hand in hand:
 *
 * 1. If any account other than the admin calls the proxy, the call will be forwarded to the implementation, even if
 * that call matches one of the admin functions exposed by the proxy itself.
 * 2. If the admin calls the proxy, it can access the admin functions, but its calls will never be forwarded to the
 * implementation. If the admin tries to call a function on the implementation it will fail with an error that says
 * "admin cannot fallback to proxy target".
 *
 * These properties mean that the admin account can only be used for admin actions like upgrading the proxy or changing
 * the admin, so it's best if it's a dedicated account that is not used for anything else. This will avoid headaches due
 * to sudden errors when trying to call a function from the proxy implementation.
 *
 * Our recommendation is for the dedicated account to be an instance of the {ProxyAdmin} contract. If set up this way,
 * you should think of the `ProxyAdmin` instance as the real administrative interface of your proxy.
 */
contract TransparentUpgradeableProxy is ERC1967Proxy {
    /**
     * @dev Initializes an upgradeable proxy managed by `_admin`, backed by the implementation at `_logic`, and
     * optionally initialized with `_data` as explained in {ERC1967Proxy-constructor}.
     */
    constructor(
        address _logic,
        address admin_,
        bytes memory _data
    ) payable ERC1967Proxy(_logic, _data) {
        assert(_ADMIN_SLOT == bytes32(uint256(keccak256("eip1967.proxy.admin")) - 1));
        _changeAdmin(admin_);
    }

    /**
     * @dev Modifier used internally that will delegate the call to the implementation unless the sender is the admin.
     */
    modifier ifAdmin() {
        if (msg.sender == _getAdmin()) {
            _;
        } else {
            _fallback();
        }
    }

    /**
     * @dev Returns the current admin.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyAdmin}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103`
     */
    function admin() external ifAdmin returns (address admin_) {
        admin_ = _getAdmin();
    }

    /**
     * @dev Returns the current implementation.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-getProxyImplementation}.
     *
     * TIP: To get this value clients can read directly from the storage slot shown below (specified by EIP1967) using the
     * https://eth.wiki/json-rpc/API#eth_getstorageat[`eth_getStorageAt`] RPC call.
     * `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc`
     */
    function implementation() external ifAdmin returns (address implementation_) {
        implementation_ = _implementation();
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-changeProxyAdmin}.
     */
    function changeAdmin(address newAdmin) external virtual ifAdmin {
        _changeAdmin(newAdmin);
    }

    /**
     * @dev Upgrade the implementation of the proxy.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgrade}.
     */
    function upgradeTo(address newImplementation) external ifAdmin {
        _upgradeToAndCall(newImplementation, bytes(""), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy, and then call a function from the new implementation as specified
     * by `data`, which should be an encoded function call. This is useful to initialize new storage variables in the
     * proxied contract.
     *
     * NOTE: Only the admin can call this function. See {ProxyAdmin-upgradeAndCall}.
     */
    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable ifAdmin {
        _upgradeToAndCall(newImplementation, data, true);
    }

    /**
     * @dev Returns the current admin.
     */
    function _admin() internal view virtual returns (address) {
        return _getAdmin();
    }

    /**
     * @dev Makes sure the admin cannot access the fallback function. See {Proxy-_beforeFallback}.
     */
    function _beforeFallback() internal virtual override {
        require(msg.sender != _getAdmin(), "TransparentUpgradeableProxy: admin cannot fallback to proxy target");
        super._beforeFallback();
    }
}

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

pragma solidity ^0.8.0;

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

{
  "compilationTarget": {
    "src/contracts/StakingContract.sol": "StakingContract"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "remappings": []
}