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// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.16;

import './library/UtilLib.sol';

import './interfaces/ISocializingPool.sol';
import './interfaces/SDCollateral/ISDCollateral.sol';
import './interfaces/IStaderStakePoolManager.sol';
import './interfaces/IPermissionlessNodeRegistry.sol';

import '@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/security/PausableUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol';
import '@openzeppelin/contracts-upgradeable/utils/cryptography/MerkleProofUpgradeable.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';

contract SocializingPool is
    ISocializingPool,
    AccessControlUpgradeable,
    PausableUpgradeable,
    ReentrancyGuardUpgradeable
{
    IStaderConfig public override staderConfig;
    uint256 public override totalOperatorETHRewardsRemaining;
    uint256 public override totalOperatorSDRewardsRemaining;
    uint256 public override initialBlock;

    mapping(address => mapping(uint256 => bool)) public override claimedRewards;
    mapping(uint256 => bool) public handledRewards;
    RewardsData public lastReportedRewardsData;
    mapping(uint256 => RewardsData) public rewardsDataMap;

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    function initialize(address _admin, address _staderConfig) external initializer {
        UtilLib.checkNonZeroAddress(_admin);
        UtilLib.checkNonZeroAddress(_staderConfig);

        __AccessControl_init();
        __Pausable_init();
        __ReentrancyGuard_init();

        staderConfig = IStaderConfig(_staderConfig);
        initialBlock = block.number;

        _grantRole(DEFAULT_ADMIN_ROLE, _admin);
    }

    /**
     * @notice Allows the contract to receive ETH
     * @dev execution layer rewards may be sent as plain ETH transfers
     */
    receive() external payable {
        emit ETHReceived(msg.sender, msg.value);
    }

    function handleRewards(RewardsData calldata _rewardsData) external override nonReentrant {
        UtilLib.onlyStaderContract(msg.sender, staderConfig, staderConfig.STADER_ORACLE());

        if (handledRewards[_rewardsData.index]) {
            revert RewardAlreadyHandled();
        }
        if (
            _rewardsData.operatorETHRewards + _rewardsData.userETHRewards + _rewardsData.protocolETHRewards >
            address(this).balance - totalOperatorETHRewardsRemaining
        ) {
            revert InsufficientETHRewards();
        }
        if (
            _rewardsData.operatorSDRewards >
            IERC20(staderConfig.getStaderToken()).balanceOf(address(this)) - totalOperatorSDRewardsRemaining
        ) {
            revert InsufficientSDRewards();
        }

        handledRewards[_rewardsData.index] = true;
        totalOperatorETHRewardsRemaining += _rewardsData.operatorETHRewards;
        totalOperatorSDRewardsRemaining += _rewardsData.operatorSDRewards;

        lastReportedRewardsData = _rewardsData;
        rewardsDataMap[_rewardsData.index] = _rewardsData;

        IStaderStakePoolManager(staderConfig.getStakePoolManager()).receiveExecutionLayerRewards{
            value: _rewardsData.userETHRewards
        }();

        (bool success, ) = payable(staderConfig.getStaderTreasury()).call{value: _rewardsData.protocolETHRewards}('');
        if (!success) {
            revert ETHTransferFailed(staderConfig.getStaderTreasury(), _rewardsData.protocolETHRewards);
        }

        emit OperatorRewardsUpdated(
            _rewardsData.operatorETHRewards,
            totalOperatorETHRewardsRemaining,
            _rewardsData.operatorSDRewards,
            totalOperatorSDRewardsRemaining
        );

        emit UserETHRewardsTransferred(_rewardsData.userETHRewards);
        emit ProtocolETHRewardsTransferred(_rewardsData.protocolETHRewards);
    }

    function claim(
        uint256[] calldata _index,
        uint256[] calldata _amountSD,
        uint256[] calldata _amountETH,
        bytes32[][] calldata _merkleProof
    ) external override nonReentrant whenNotPaused {
        _claimAndDepositSD(false, _index, _amountSD, _amountETH, _merkleProof);
    }

    ///@notice claim ETH rewards along with depositing SD Token rewards as collateral
    function claimAndDepositSD(
        uint256[] calldata _index,
        uint256[] calldata _amountSD,
        uint256[] calldata _amountETH,
        bytes32[][] calldata _merkleProof
    ) external override nonReentrant whenNotPaused {
        _claimAndDepositSD(true, _index, _amountSD, _amountETH, _merkleProof);
    }

    function _claimAndDepositSD(
        bool _depositSDAsCollateral,
        uint256[] calldata _index,
        uint256[] calldata _amountSD,
        uint256[] calldata _amountETH,
        bytes32[][] calldata _merkleProof
    ) internal {
        (uint256 totalAmountSD, uint256 totalAmountETH) = _claim(
            _index,
            msg.sender,
            _amountSD,
            _amountETH,
            _merkleProof
        );

        address operatorRewardsAddr = UtilLib.getOperatorRewardAddress(msg.sender, staderConfig);

        bool success;
        if (totalAmountETH > 0) {
            totalOperatorETHRewardsRemaining -= totalAmountETH;
            (success, ) = payable(operatorRewardsAddr).call{value: totalAmountETH}('');
            if (!success) {
                revert ETHTransferFailed(operatorRewardsAddr, totalAmountETH);
            }
        }
        totalOperatorSDRewardsRemaining -= totalAmountSD;

        if (_depositSDAsCollateral) {
            ISDCollateral(staderConfig.getSDCollateral()).depositSDAsCollateralOnBehalf(msg.sender, totalAmountSD);
        } else {
            if (!IERC20(staderConfig.getStaderToken()).transfer(operatorRewardsAddr, totalAmountSD)) {
                revert SDTransferFailed();
            }
        }
        emit OperatorRewardsClaimed(operatorRewardsAddr, totalAmountETH, totalAmountSD);
    }

    function _claim(
        uint256[] calldata _index,
        address _operator,
        uint256[] calldata _amountSD,
        uint256[] calldata _amountETH,
        bytes32[][] calldata _merkleProof
    ) internal returns (uint256 _totalAmountSD, uint256 _totalAmountETH) {
        uint256 indexLength = _index.length;
        for (uint256 i; i < indexLength; i++) {
            if (_amountSD[i] == 0 && _amountETH[i] == 0) {
                revert InvalidAmount();
            }
            if (claimedRewards[_operator][_index[i]]) {
                revert RewardAlreadyClaimed(_operator, _index[i]);
            }

            _totalAmountSD += _amountSD[i];
            _totalAmountETH += _amountETH[i];
            claimedRewards[_operator][_index[i]] = true;

            if (!verifyProof(_index[i], _operator, _amountSD[i], _amountETH[i], _merkleProof[i])) {
                revert InvalidProof(_index[i], _operator);
            }
        }
    }

    /// @notice for max approval to SDCollateral for spending SD tokens
    function maxApproveSD() external override {
        UtilLib.onlyManagerRole(msg.sender, staderConfig);
        address sdCollateral = staderConfig.getSDCollateral();
        UtilLib.checkNonZeroAddress(sdCollateral);
        IERC20(staderConfig.getStaderToken()).approve(sdCollateral, type(uint256).max);
    }

    function verifyProof(
        uint256 _index,
        address _operator,
        uint256 _amountSD,
        uint256 _amountETH,
        bytes32[] calldata _merkleProof
    ) public view returns (bool) {
        if (_index == 0 || _index > lastReportedRewardsData.index) {
            revert InvalidCycleIndex();
        }
        bytes32 merkleRoot = rewardsDataMap[_index].merkleRoot;
        bytes32 node = keccak256(abi.encodePacked(_operator, _amountSD, _amountETH));
        return MerkleProofUpgradeable.verify(_merkleProof, merkleRoot, node);
    }

    // SETTERS
    function updateStaderConfig(address _staderConfig) external override onlyRole(DEFAULT_ADMIN_ROLE) {
        UtilLib.checkNonZeroAddress(_staderConfig);
        staderConfig = IStaderConfig(_staderConfig);
        emit UpdatedStaderConfig(_staderConfig);
    }

    /**
     * @dev Triggers stopped state.
     * Contract must not be paused.
     */
    function pause() external {
        UtilLib.onlyManagerRole(msg.sender, staderConfig);
        _pause();
    }

    /**
     * @dev Returns to normal state.
     * Contract must be paused
     */
    function unpause() external onlyRole(DEFAULT_ADMIN_ROLE) {
        _unpause();
    }

    // GETTERS

    function getCurrentRewardsIndex() public view returns (uint256 index) {
        index = lastReportedRewardsData.index + 1;
    }

    function getRewardDetails()
        external
        view
        override
        returns (
            uint256 currentIndex,
            uint256 currentStartBlock,
            uint256 currentEndBlock
        )
    {
        currentIndex = getCurrentRewardsIndex();
        (currentStartBlock, currentEndBlock) = getRewardCycleDetails(currentIndex);
    }

    /// @param _index reward cycle index for which details is required
    function getRewardCycleDetails(uint256 _index) public view returns (uint256 _startBlock, uint256 _endBlock) {
        if (_index == 0) {
            revert InvalidCycleIndex();
        }

        // past cycles
        if (rewardsDataMap[_index].reportingBlockNumber != 0) {
            _startBlock = rewardsDataMap[_index - 1].reportingBlockNumber + 1;
            _endBlock = rewardsDataMap[_index].reportingBlockNumber;
            return (_startBlock, _endBlock);
        }

        // for current cycle

        uint256 cycleDuration = staderConfig.getSocializingPoolCycleDuration();
        if (_index == 1) {
            return (initialBlock, initialBlock + cycleDuration - 1);
        }
        if (rewardsDataMap[_index - 1].reportingBlockNumber != 0) {
            _startBlock = rewardsDataMap[_index - 1].reportingBlockNumber + 1;
            _endBlock = rewardsDataMap[_index - 1].reportingBlockNumber + cycleDuration;
            return (_startBlock, _endBlock);
        }

        // everything else is a future cycle
        revert FutureCycleIndex();
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

import '../interfaces/IStaderConfig.sol';
import '../interfaces/INodeRegistry.sol';
import '../interfaces/IPoolUtils.sol';
import '../interfaces/IVaultProxy.sol';

library UtilLib {
    error ZeroAddress();
    error InvalidPubkeyLength();
    error CallerNotManager();
    error CallerNotOperator();
    error CallerNotStaderContract();
    error CallerNotWithdrawVault();
    error TransferFailed();

    uint64 private constant VALIDATOR_PUBKEY_LENGTH = 48;

    /// @notice zero address check modifier
    function checkNonZeroAddress(address _address) internal pure {
        if (_address == address(0)) revert ZeroAddress();
    }

    //checks for Manager role in staderConfig
    function onlyManagerRole(address _addr, IStaderConfig _staderConfig) internal view {
        if (!_staderConfig.onlyManagerRole(_addr)) {
            revert CallerNotManager();
        }
    }

    function onlyOperatorRole(address _addr, IStaderConfig _staderConfig) internal view {
        if (!_staderConfig.onlyOperatorRole(_addr)) {
            revert CallerNotOperator();
        }
    }

    //checks if caller is a stader contract address
    function onlyStaderContract(
        address _addr,
        IStaderConfig _staderConfig,
        bytes32 _contractName
    ) internal view {
        if (!_staderConfig.onlyStaderContract(_addr, _contractName)) {
            revert CallerNotStaderContract();
        }
    }

    function getPubkeyForValidSender(
        uint8 _poolId,
        uint256 _validatorId,
        address _addr,
        IStaderConfig _staderConfig
    ) internal view returns (bytes memory) {
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(_poolId);
        (, bytes memory pubkey, , , address withdrawVaultAddress, , , ) = INodeRegistry(nodeRegistry).validatorRegistry(
            _validatorId
        );
        if (_addr != withdrawVaultAddress) {
            revert CallerNotWithdrawVault();
        }
        return pubkey;
    }

    function getOperatorForValidSender(
        uint8 _poolId,
        uint256 _validatorId,
        address _addr,
        IStaderConfig _staderConfig
    ) internal view returns (address) {
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(_poolId);
        (, , , , address withdrawVaultAddress, uint256 operatorId, , ) = INodeRegistry(nodeRegistry).validatorRegistry(
            _validatorId
        );
        if (_addr != withdrawVaultAddress) {
            revert CallerNotWithdrawVault();
        }
        (, , , , address operator) = INodeRegistry(nodeRegistry).operatorStructById(operatorId);
        return operator;
    }

    function onlyValidatorWithdrawVault(
        uint8 _poolId,
        uint256 _validatorId,
        address _addr,
        IStaderConfig _staderConfig
    ) internal view {
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(_poolId);
        (, , , , address withdrawVaultAddress, , , ) = INodeRegistry(nodeRegistry).validatorRegistry(_validatorId);
        if (_addr != withdrawVaultAddress) {
            revert CallerNotWithdrawVault();
        }
    }

    function getOperatorAddressByValidatorId(
        uint8 _poolId,
        uint256 _validatorId,
        IStaderConfig _staderConfig
    ) internal view returns (address) {
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(_poolId);
        (, , , , , uint256 operatorId, , ) = INodeRegistry(nodeRegistry).validatorRegistry(_validatorId);
        (, , , , address operatorAddress) = INodeRegistry(nodeRegistry).operatorStructById(operatorId);

        return operatorAddress;
    }

    function getOperatorAddressByOperatorId(
        uint8 _poolId,
        uint256 _operatorId,
        IStaderConfig _staderConfig
    ) internal view returns (address) {
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(_poolId);
        (, , , , address operatorAddress) = INodeRegistry(nodeRegistry).operatorStructById(_operatorId);

        return operatorAddress;
    }

    function getOperatorRewardAddress(address _operator, IStaderConfig _staderConfig)
        internal
        view
        returns (address payable)
    {
        uint8 poolId = IPoolUtils(_staderConfig.getPoolUtils()).getOperatorPoolId(_operator);
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(poolId);
        uint256 operatorId = INodeRegistry(nodeRegistry).operatorIDByAddress(_operator);
        return INodeRegistry(nodeRegistry).getOperatorRewardAddress(operatorId);
    }

    /**
     * @notice Computes the public key root.
     * @param _pubkey The validator public key for which to compute the root.
     * @return The root of the public key.
     */
    function getPubkeyRoot(bytes calldata _pubkey) internal pure returns (bytes32) {
        if (_pubkey.length != VALIDATOR_PUBKEY_LENGTH) {
            revert InvalidPubkeyLength();
        }

        // Append 16 bytes of zero padding to the pubkey and compute its hash to get the pubkey root.
        return sha256(abi.encodePacked(_pubkey, bytes16(0)));
    }

    function getValidatorSettleStatus(bytes calldata _pubkey, IStaderConfig _staderConfig)
        internal
        view
        returns (bool)
    {
        uint8 poolId = IPoolUtils(_staderConfig.getPoolUtils()).getValidatorPoolId(_pubkey);
        address nodeRegistry = IPoolUtils(_staderConfig.getPoolUtils()).getNodeRegistry(poolId);
        uint256 validatorId = INodeRegistry(nodeRegistry).validatorIdByPubkey(_pubkey);
        (, , , , address withdrawVaultAddress, , , ) = INodeRegistry(nodeRegistry).validatorRegistry(validatorId);
        return IVaultProxy(withdrawVaultAddress).vaultSettleStatus();
    }

    function computeExchangeRate(
        uint256 totalETHBalance,
        uint256 totalETHXSupply,
        IStaderConfig _staderConfig
    ) internal view returns (uint256) {
        uint256 DECIMALS = _staderConfig.getDecimals();
        uint256 newExchangeRate = (totalETHBalance == 0 || totalETHXSupply == 0)
            ? DECIMALS
            : (totalETHBalance * DECIMALS) / totalETHXSupply;
        return newExchangeRate;
    }

    function sendValue(address _receiver, uint256 _amount) internal {
        (bool success, ) = payable(_receiver).call{value: _amount}('');
        if (!success) {
            revert TransferFailed();
        }
    }
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.16;

import './IStaderConfig.sol';

/// @title RewardsData
/// @notice This struct holds rewards merkleRoot and rewards split
struct RewardsData {
    /// @notice The block number when the rewards data was last updated
    uint256 reportingBlockNumber;
    /// @notice The index of merkle tree or rewards cycle
    uint256 index;
    /// @notice The merkle root hash
    bytes32 merkleRoot;
    /// @notice pool id of operators
    uint8 poolId;
    /// @notice operator ETH rewards for index cycle
    uint256 operatorETHRewards;
    /// @notice user ETH rewards for index cycle
    uint256 userETHRewards;
    /// @notice protocol ETH rewards for index cycle
    uint256 protocolETHRewards;
    /// @notice operator SD rewards for index cycle
    uint256 operatorSDRewards;
}

interface ISocializingPool {
    // errors
    error ETHTransferFailed(address recipient, uint256 amount);
    error SDTransferFailed();
    error RewardAlreadyHandled();
    error RewardAlreadyClaimed(address operator, uint256 cycle);
    error InsufficientETHRewards();
    error InsufficientSDRewards();
    error InvalidAmount();
    error InvalidProof(uint256 cycle, address operator);
    error InvalidCycleIndex();
    error FutureCycleIndex();

    // events
    event UpdatedStaderConfig(address indexed staderConfig);
    event ETHReceived(address indexed sender, uint256 amount);
    event UpdatedStaderValidatorRegistry(address indexed staderValidatorRegistry);
    event UpdatedStaderOperatorRegistry(address indexed staderOperatorRegistry);
    event OperatorRewardsClaimed(address indexed recipient, uint256 ethRewards, uint256 sdRewards);
    event OperatorRewardsUpdated(
        uint256 ethRewards,
        uint256 totalETHRewards,
        uint256 sdRewards,
        uint256 totalSDRewards
    );

    event UserETHRewardsTransferred(uint256 ethRewards);
    event ProtocolETHRewardsTransferred(uint256 ethRewards);

    // methods
    function handleRewards(RewardsData calldata _rewardsData) external;

    function maxApproveSD() external;

    function claim(
        uint256[] calldata _index,
        uint256[] calldata _amountSD,
        uint256[] calldata _amountETH,
        bytes32[][] calldata _merkleProof
    ) external;

    function claimAndDepositSD(
        uint256[] calldata _index,
        uint256[] calldata _amountSD,
        uint256[] calldata _amountETH,
        bytes32[][] calldata _merkleProof
    ) external;

    // setters
    function updateStaderConfig(address _staderConfig) external;

    // getters
    function staderConfig() external view returns (IStaderConfig);

    function claimedRewards(address _user, uint256 _index) external view returns (bool);

    function totalOperatorETHRewardsRemaining() external view returns (uint256);

    function totalOperatorSDRewardsRemaining() external view returns (uint256);

    function initialBlock() external view returns (uint256);

    function verifyProof(
        uint256 _index,
        address _operator,
        uint256 _amountSD,
        uint256 _amountETH,
        bytes32[] calldata _merkleProof
    ) external view returns (bool);

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

    function getRewardDetails()
        external
        view
        returns (
            uint256 currentIndex,
            uint256 currentStartBlock,
            uint256 currentEndBlock
        );

    function getRewardCycleDetails(uint256 _index) external view returns (uint256 _startBlock, uint256 _endBlock);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

import '../IStaderConfig.sol';

interface ISDCollateral {
    struct PoolThresholdInfo {
        uint256 minThreshold;
        uint256 maxThreshold;
        uint256 withdrawThreshold;
        string units;
    }

    // errors
    error InsufficientSDToWithdraw(uint256 operatorSDCollateral);
    error InvalidPoolId();
    error InvalidPoolLimit();
    error SDTransferFailed();
    error NoStateChange();
    error NonTerminalKeysNotZero();
    error InsufficientSelfBondToRepay();

    // events
    event SDRepaid(address operator, uint256 repayAmount);
    event UpdatedStaderConfig(address indexed staderConfig);
    event SDDeposited(address indexed operator, uint256 sdAmount);
    event UtilizedSDDeposited(address indexed operator, uint256 sdAmount);
    event SDWithdrawn(address indexed operator, uint256 sdAmount);
    event ReducedUtilizedPosition(address indexed operator, uint256 sdAmount);
    event UtilizedSDSlashed(address operator, uint256 sdSlashFromUtilized);
    event SDSlashed(address indexed operator, address indexed auction, uint256 sdSlashed);
    event UpdatedPoolThreshold(uint8 poolId, uint256 minThreshold, uint256 withdrawThreshold);
    event UpdatedPoolIdForOperator(uint8 poolId, address operator);

    // methods
    function depositSDAsCollateral(uint256 _sdAmount) external;

    function depositSDAsCollateralOnBehalf(address _operator, uint256 _sdAmount) external;

    function depositSDFromUtilityPool(address _operator, uint256 _sdAmount) external;

    function reduceUtilizedSDPosition(address operator, uint256 amount) external;

    function withdraw(uint256 _requestedSD) external;

    function withdrawOnBehalf(uint256 _requestedSD, address _operator) external;

    function transferBackUtilizedSD(address _operator) external;

    function slashValidatorSD(uint256 _validatorId, uint8 _poolId) external;

    function maxApproveSD() external;

    // setters
    function updateStaderConfig(address _staderConfig) external;

    function updatePoolThreshold(
        uint8 _poolId,
        uint256 _minThreshold,
        uint256 _maxThreshold,
        uint256 _withdrawThreshold,
        string memory _units
    ) external;

    // getters
    function staderConfig() external view returns (IStaderConfig);

    function operatorSDBalance(address) external view returns (uint256);

    function operatorUtilizedSDBalance(address) external view returns (uint256);

    function getOperatorWithdrawThreshold(address _operator) external view returns (uint256 operatorWithdrawThreshold);

    function hasEnoughSDCollateral(
        address _operator,
        uint8 _poolId,
        uint256 _numValidators
    ) external view returns (bool);

    function getMinimumSDToBond(uint8 _poolId, uint256 _numValidator) external view returns (uint256 _minSDToBond);

    function getRemainingSDToBond(
        address _operator,
        uint8 _poolId,
        uint256 _numValidator
    ) external view returns (uint256);

    function getRewardEligibleSD(address _operator) external view returns (uint256 _rewardEligibleSD);

    function convertSDToETH(uint256 _sdAmount) external view returns (uint256);

    function convertETHToSD(uint256 _ethAmount) external view returns (uint256);

    function getOperatorInfo(address _operator)
        external
        view
        returns (
            uint8 _poolId,
            uint256 _operatorId,
            uint256 _validatorCount
        );
}

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.16;

interface IStaderStakePoolManager {
    // Errors
    error InvalidDepositAmount();
    error UnsupportedOperation();
    error InsufficientBalance();
    error TransferFailed();
    error PoolIdDoesNotExit();
    error CooldownNotComplete();
    error UnsupportedOperationInSafeMode();

    // Events
    event UpdatedStaderConfig(address staderConfig);
    event DepositReferral(
        address indexed caller,
        address indexed owner,
        uint256 assets,
        uint256 shares,
        string referralId
    );
    event Deposited(address indexed caller, address indexed owner, uint256 assets, uint256 shares);
    event ExecutionLayerRewardsReceived(uint256 amount);
    event AuctionedEthReceived(uint256 amount);
    event ReceivedExcessEthFromPool(uint8 indexed poolId);
    event TransferredETHToUserWithdrawManager(uint256 amount);
    event ETHTransferredToPool(uint256 indexed poolId, address poolAddress, uint256 validatorCount);
    event WithdrawVaultUserShareReceived(uint256 amount);
    event UpdatedExcessETHDepositCoolDown(uint256 excessETHDepositCoolDown);

    function deposit(address _receiver, string calldata _referralId) external payable returns (uint256);

    function deposit(address _receiver) external payable returns (uint256);

    function previewDeposit(uint256 _assets) external view returns (uint256);

    function previewWithdraw(uint256 _shares) external view returns (uint256);

    function getExchangeRate() external view returns (uint256);

    function totalAssets() external view returns (uint256);

    function convertToShares(uint256 _assets) external view returns (uint256);

    function convertToAssets(uint256 _shares) external view returns (uint256);

    function maxDeposit() external view returns (uint256);

    function minDeposit() external view returns (uint256);

    function receiveExecutionLayerRewards() external payable;

    function receiveWithdrawVaultUserShare() external payable;

    function receiveEthFromAuction() external payable;

    function receiveExcessEthFromPool(uint8 _poolId) external payable;

    function transferETHToUserWithdrawManager(uint256 _amount) external;

    function validatorBatchDeposit(uint8 _poolId) external;

    function depositETHOverTargetWeight() external;

    function isVaultHealthy() external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

import '../library/ValidatorStatus.sol';
import './INodeRegistry.sol';

interface IPermissionlessNodeRegistry {
    // Errors
    error TransferFailed();
    error InvalidBondEthValue();
    error InSufficientBalance();
    error CooldownNotComplete();
    error NoChangeInState();

    // Events
    event OnboardedOperator(
        address indexed nodeOperator,
        address nodeRewardAddress,
        uint256 operatorId,
        bool optInForSocializingPool
    );
    event ValidatorMarkedReadyToDeposit(bytes pubkey, uint256 validatorId);
    event UpdatedNextQueuedValidatorIndex(uint256 nextQueuedValidatorIndex);
    event UpdatedSocializingPoolState(uint256 operatorId, bool optedForSocializingPool, uint256 block);
    event TransferredCollateralToPool(uint256 amount);
    event ValidatorAddedViaReferral(uint256 amount, string referralId);

    //Getters

    function validatorQueueSize() external view returns (uint256);

    function nextQueuedValidatorIndex() external view returns (uint256);

    function FRONT_RUN_PENALTY() external view returns (uint256);

    function queuedValidators(uint256) external view returns (uint256);

    function nodeELRewardVaultByOperatorId(uint256) external view returns (address);

    function getAllNodeELVaultAddress(uint256 _pageNumber, uint256 _pageSize) external view returns (address[] memory);

    //Setters

    function addValidatorKeys(
        bytes[] calldata _pubkey,
        bytes[] calldata _preDepositSignature,
        bytes[] calldata _depositSignature
    ) external payable;

    function onboardNodeOperator(
        bool _optInForMevSocialize,
        string calldata _operatorName,
        address payable _operatorRewardAddress
    ) external returns (address mevFeeRecipientAddress);

    function addValidatorKeysWithUtilizeSD(
        string calldata _referralId,
        uint256 _amountOfSDToUtilize,
        bytes[] calldata _pubkey,
        bytes[] calldata _preDepositSignature,
        bytes[] calldata _depositSignature
    ) external payable;

    function updateNextQueuedValidatorIndex(uint256 _nextQueuedValidatorIndex) external;

    function updateDepositStatusAndBlock(uint256 _validatorId) external;

    function increaseTotalActiveValidatorCount(uint256 _count) external;

    function transferCollateralToPool(uint256 _amount) external;

    function updateInputKeyCountLimit(uint16 _batchKeyDepositLimit) external;

    function updateMaxNonTerminalKeyPerOperator(uint64 _maxNonTerminalKeyPerOperator) external;

    function proposeRewardAddress(address _operatorAddress, address _newRewardAddress) external;

    function confirmRewardAddressChange(address _operatorAddress) external;

    function updateOperatorName(string calldata _operatorName) external;

    function changeSocializingPoolState(bool _optInForSocializingPool)
        external
        returns (address mevFeeRecipientAddress);

    function pause() external;

    function unpause() external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (access/AccessControl.sol)

pragma solidity ^0.8.0;

import "./IAccessControlUpgradeable.sol";
import "../utils/ContextUpgradeable.sol";
import "../utils/StringsUpgradeable.sol";
import "../utils/introspection/ERC165Upgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
    function __AccessControl_init() internal onlyInitializing {
    }

    function __AccessControl_init_unchained() internal onlyInitializing {
    }
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role);
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `_msgSender()` is missing `role`.
     * Overriding this function changes the behavior of the {onlyRole} modifier.
     *
     * Format of the revert message is described in {_checkRole}.
     *
     * _Available since v4.6._
     */
    function _checkRole(bytes32 role) internal view virtual {
        _checkRole(role, _msgSender());
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view virtual {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        StringsUpgradeable.toHexString(account),
                        " is missing role ",
                        StringsUpgradeable.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
        return _roles[role].adminRole;
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleGranted} event.
     */
    function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _grantRole(role, account);
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     *
     * May emit a {RoleRevoked} event.
     */
    function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
        _revokeRole(role, account);
    }

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been revoked `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     *
     * May emit a {RoleRevoked} event.
     */
    function renounceRole(bytes32 role, address account) public virtual override {
        require(account == _msgSender(), "AccessControl: can only renounce roles for self");

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * May emit a {RoleGranted} event.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     *
     * NOTE: This function is deprecated in favor of {_grantRole}.
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

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

    /**
     * @dev Grants `role` to `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleGranted} event.
     */
    function _grantRole(bytes32 role, address account) internal virtual {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    /**
     * @dev Revokes `role` from `account`.
     *
     * Internal function without access restriction.
     *
     * May emit a {RoleRevoked} event.
     */
    function _revokeRole(bytes32 role, address account) internal virtual {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract PausableUpgradeable is Initializable, ContextUpgradeable {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    function __Pausable_init() internal onlyInitializing {
        __Pausable_init_unchained();
    }

    function __Pausable_init_unchained() internal onlyInitializing {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

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

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

    uint256 private _status;

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

    function __ReentrancyGuard_init_unchained() internal onlyInitializing {
        _status = _NOT_ENTERED;
    }

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

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Tree proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 */
library MerkleProofUpgradeable {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Calldata version of {verify}
     *
     * _Available since v4.7._
     */
    function verifyCalldata(
        bytes32[] calldata proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProofCalldata(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Calldata version of {processProof}
     *
     * _Available since v4.7._
     */
    function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            computedHash = _hashPair(computedHash, proof[i]);
        }
        return computedHash;
    }

    /**
     * @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by
     * `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
     *
     * _Available since v4.7._
     */
    function multiProofVerify(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProof(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Calldata version of {multiProofVerify}
     *
     * _Available since v4.7._
     */
    function multiProofVerifyCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32 root,
        bytes32[] memory leaves
    ) internal pure returns (bool) {
        return processMultiProofCalldata(proof, proofFlags, leaves) == root;
    }

    /**
     * @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`,
     * consuming from one or the other at each step according to the instructions given by
     * `proofFlags`.
     *
     * _Available since v4.7._
     */
    function processMultiProof(
        bytes32[] memory proof,
        bool[] memory proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

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

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    /**
     * @dev Calldata version of {processMultiProof}
     *
     * _Available since v4.7._
     */
    function processMultiProofCalldata(
        bytes32[] calldata proof,
        bool[] calldata proofFlags,
        bytes32[] memory leaves
    ) internal pure returns (bytes32 merkleRoot) {
        // This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
        // consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
        // `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
        // the merkle tree.
        uint256 leavesLen = leaves.length;
        uint256 totalHashes = proofFlags.length;

        // Check proof validity.
        require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");

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

        if (totalHashes > 0) {
            return hashes[totalHashes - 1];
        } else if (leavesLen > 0) {
            return leaves[0];
        } else {
            return proof[0];
        }
    }

    function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
        return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        /// @solidity memory-safe-assembly
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

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

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

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

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

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

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

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

interface IStaderConfig {
    // Errors
    error InvalidLimits();
    error InvalidMinDepositValue();
    error InvalidMaxDepositValue();
    error InvalidMinWithdrawValue();
    error InvalidMaxWithdrawValue();
    error IndenticalValue();

    // Events
    event SetConstant(bytes32 key, uint256 amount);
    event SetVariable(bytes32 key, uint256 amount);
    event SetAccount(bytes32 key, address newAddress);
    event SetContract(bytes32 key, address newAddress);
    event SetToken(bytes32 key, address newAddress);

    //Contracts
    function POOL_UTILS() external view returns (bytes32);

    function POOL_SELECTOR() external view returns (bytes32);

    function SD_COLLATERAL() external view returns (bytes32);

    function OPERATOR_REWARD_COLLECTOR() external view returns (bytes32);

    function VAULT_FACTORY() external view returns (bytes32);

    function STADER_ORACLE() external view returns (bytes32);

    function AUCTION_CONTRACT() external view returns (bytes32);

    function PENALTY_CONTRACT() external view returns (bytes32);

    function PERMISSIONED_POOL() external view returns (bytes32);

    function STAKE_POOL_MANAGER() external view returns (bytes32);

    function ETH_DEPOSIT_CONTRACT() external view returns (bytes32);

    function PERMISSIONLESS_POOL() external view returns (bytes32);

    function USER_WITHDRAW_MANAGER() external view returns (bytes32);

    function STADER_INSURANCE_FUND() external view returns (bytes32);

    function PERMISSIONED_NODE_REGISTRY() external view returns (bytes32);

    function PERMISSIONLESS_NODE_REGISTRY() external view returns (bytes32);

    function PERMISSIONED_SOCIALIZING_POOL() external view returns (bytes32);

    function PERMISSIONLESS_SOCIALIZING_POOL() external view returns (bytes32);

    function NODE_EL_REWARD_VAULT_IMPLEMENTATION() external view returns (bytes32);

    function VALIDATOR_WITHDRAWAL_VAULT_IMPLEMENTATION() external view returns (bytes32);

    //SD Utility Pool

    function SD_UTILITY_POOL() external view returns (bytes32);

    function SD_INCENTIVE_CONTROLLER() external view returns (bytes32);

    //POR Feed Proxy
    function ETH_BALANCE_POR_FEED() external view returns (bytes32);

    function ETHX_SUPPLY_POR_FEED() external view returns (bytes32);

    //Roles
    function MANAGER() external view returns (bytes32);

    function OPERATOR() external view returns (bytes32);

    // Constants
    function getStakedEthPerNode() external view returns (uint256);

    function getPreDepositSize() external view returns (uint256);

    function getFullDepositSize() external view returns (uint256);

    function getDecimals() external view returns (uint256);

    function getTotalFee() external view returns (uint256);

    function getOperatorMaxNameLength() external view returns (uint256);

    // Variables
    function getSocializingPoolCycleDuration() external view returns (uint256);

    function getSocializingPoolOptInCoolingPeriod() external view returns (uint256);

    function getRewardsThreshold() external view returns (uint256);

    function getMinDepositAmount() external view returns (uint256);

    function getMaxDepositAmount() external view returns (uint256);

    function getMinWithdrawAmount() external view returns (uint256);

    function getMaxWithdrawAmount() external view returns (uint256);

    function getMinBlockDelayToFinalizeWithdrawRequest() external view returns (uint256);

    function getWithdrawnKeyBatchSize() external view returns (uint256);

    // Accounts
    function getAdmin() external view returns (address);

    function getStaderTreasury() external view returns (address);

    // Contracts
    function getPoolUtils() external view returns (address);

    function getPoolSelector() external view returns (address);

    function getSDCollateral() external view returns (address);

    function getOperatorRewardsCollector() external view returns (address);

    function getVaultFactory() external view returns (address);

    function getStaderOracle() external view returns (address);

    function getAuctionContract() external view returns (address);

    function getPenaltyContract() external view returns (address);

    function getPermissionedPool() external view returns (address);

    function getStakePoolManager() external view returns (address);

    function getETHDepositContract() external view returns (address);

    function getPermissionlessPool() external view returns (address);

    function getUserWithdrawManager() external view returns (address);

    function getStaderInsuranceFund() external view returns (address);

    function getPermissionedNodeRegistry() external view returns (address);

    function getPermissionlessNodeRegistry() external view returns (address);

    function getPermissionedSocializingPool() external view returns (address);

    function getPermissionlessSocializingPool() external view returns (address);

    function getNodeELRewardVaultImplementation() external view returns (address);

    function getValidatorWithdrawalVaultImplementation() external view returns (address);

    function getETHBalancePORFeedProxy() external view returns (address);

    function getETHXSupplyPORFeedProxy() external view returns (address);

    function getSDUtilityPool() external view returns (address);

    function getSDIncentiveController() external view returns (address);

    // Tokens
    function getStaderToken() external view returns (address);

    function getETHxToken() external view returns (address);

    //checks roles and stader contracts
    function onlyStaderContract(address _addr, bytes32 _contractName) external view returns (bool);

    function onlyManagerRole(address account) external view returns (bool);

    function onlyOperatorRole(address account) external view returns (bool);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

import '../library/ValidatorStatus.sol';

struct Validator {
    ValidatorStatus status; // status of validator
    bytes pubkey; //pubkey of the validator
    bytes preDepositSignature; //signature for 1 ETH deposit on beacon chain
    bytes depositSignature; //signature for 31 ETH deposit on beacon chain
    address withdrawVaultAddress; //withdrawal vault address of validator
    uint256 operatorId; // stader network assigned Id
    uint256 depositBlock; // block number of the 31ETH deposit
    uint256 withdrawnBlock; //block number when oracle report validator as withdrawn
}

struct Operator {
    bool active; // operator status
    bool optedForSocializingPool; // operator opted for socializing pool
    string operatorName; // name of the operator
    address payable operatorRewardAddress; //Eth1 address of node for reward
    address operatorAddress; //address of operator to interact with stader
}

// Interface for the NodeRegistry contract
interface INodeRegistry {
    // Errors
    error DuplicatePoolIDOrPoolNotAdded();
    error OperatorAlreadyOnBoardedInProtocol();
    error maxKeyLimitReached();
    error OperatorNotOnBoarded();
    error InvalidKeyCount();
    error InvalidStartAndEndIndex();
    error OperatorIsDeactivate();
    error MisMatchingInputKeysSize();
    error PageNumberIsZero();
    error UNEXPECTED_STATUS();
    error PubkeyAlreadyExist();
    error NotEnoughSDCollateral();
    error TooManyVerifiedKeysReported();
    error TooManyWithdrawnKeysReported();
    error CallerNotExistingRewardAddress();
    error CallerNotNewRewardAddress();

    // Events
    event AddedValidatorKey(address indexed nodeOperator, bytes pubkey, uint256 validatorId);
    event ValidatorMarkedAsFrontRunned(bytes pubkey, uint256 validatorId);
    event ValidatorWithdrawn(bytes pubkey, uint256 validatorId);
    event ValidatorStatusMarkedAsInvalidSignature(bytes pubkey, uint256 validatorId);
    event UpdatedValidatorDepositBlock(uint256 validatorId, uint256 depositBlock);
    event UpdatedMaxNonTerminalKeyPerOperator(uint64 maxNonTerminalKeyPerOperator);
    event UpdatedInputKeyCountLimit(uint256 batchKeyDepositLimit);
    event UpdatedStaderConfig(address staderConfig);
    event RewardAddressProposed(address indexed nodeOperator, address indexed rewardAddress);
    event OperatorRewardAddressUpdated(address indexed nodeOperator, address indexed rewardAddress);
    event UpdatedOperatorName(address indexed nodeOperator, string operatorName);
    event IncreasedTotalActiveValidatorCount(uint256 totalActiveValidatorCount);
    event UpdatedVerifiedKeyBatchSize(uint256 verifiedKeysBatchSize);
    event UpdatedWithdrawnKeyBatchSize(uint256 withdrawnKeysBatchSize);
    event DecreasedTotalActiveValidatorCount(uint256 totalActiveValidatorCount);

    function withdrawnValidators(bytes[] calldata _pubkeys) external;

    function markValidatorReadyToDeposit(
        bytes[] calldata _readyToDepositPubkey,
        bytes[] calldata _frontRunPubkey,
        bytes[] calldata _invalidSignaturePubkey
    ) external;

    // return validator struct for a validator Id
    function validatorRegistry(uint256)
        external
        view
        returns (
            ValidatorStatus status,
            bytes calldata pubkey,
            bytes calldata preDepositSignature,
            bytes calldata depositSignature,
            address withdrawVaultAddress,
            uint256 operatorId,
            uint256 depositTime,
            uint256 withdrawnTime
        );

    // returns the operator struct given operator Id
    function operatorStructById(uint256)
        external
        view
        returns (
            bool active,
            bool optedForSocializingPool,
            string calldata operatorName,
            address payable operatorRewardAddress,
            address operatorAddress
        );

    // Returns the last block the operator changed the opt-in status for socializing pool
    function getSocializingPoolStateChangeBlock(uint256 _operatorId) external view returns (uint256);

    function getAllActiveValidators(uint256 _pageNumber, uint256 _pageSize) external view returns (Validator[] memory);

    function getValidatorsByOperator(
        address _operator,
        uint256 _pageNumber,
        uint256 _pageSize
    ) external view returns (Validator[] memory);

    /**
     *
     * @param _nodeOperator @notice operator total non withdrawn keys within a specified validator list
     * @param _startIndex start index in validator queue to start with
     * @param _endIndex  up to end index of validator queue to to count
     */
    function getOperatorTotalNonTerminalKeys(
        address _nodeOperator,
        uint256 _startIndex,
        uint256 _endIndex
    ) external view returns (uint64);

    // returns the total number of queued validators across all operators
    function getTotalQueuedValidatorCount() external view returns (uint256);

    // returns the total number of active validators across all operators
    function getTotalActiveValidatorCount() external view returns (uint256);

    function getCollateralETH() external view returns (uint256);

    function getOperatorTotalKeys(uint256 _operatorId) external view returns (uint256 totalKeys);

    function operatorIDByAddress(address) external view returns (uint256);

    function getOperatorRewardAddress(uint256 _operatorId) external view returns (address payable);

    function isExistingPubkey(bytes calldata _pubkey) external view returns (bool);

    function isExistingOperator(address _operAddr) external view returns (bool);

    function POOL_ID() external view returns (uint8);

    function inputKeyCountLimit() external view returns (uint16);

    function nextOperatorId() external view returns (uint256);

    function nextValidatorId() external view returns (uint256);

    function maxNonTerminalKeyPerOperator() external view returns (uint64);

    function verifiedKeyBatchSize() external view returns (uint256);

    function totalActiveValidatorCount() external view returns (uint256);

    function validatorIdByPubkey(bytes calldata _pubkey) external view returns (uint256);

    function validatorIdsByOperatorId(uint256, uint256) external view returns (uint256);
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

import './INodeRegistry.sol';

// Interface for the PoolUtils contract
interface IPoolUtils {
    // Errors
    error EmptyNameString();
    error PoolIdNotPresent();
    error MismatchingPoolId();
    error PubkeyDoesNotExit();
    error PubkeyAlreadyExist();
    error NameCrossedMaxLength();
    error InvalidLengthOfPubkey();
    error OperatorIsNotOnboarded();
    error InvalidLengthOfSignature();
    error ExistingOrMismatchingPoolId();

    // Events
    event PoolAdded(uint8 indexed poolId, address poolAddress);
    event PoolAddressUpdated(uint8 indexed poolId, address poolAddress);
    event DeactivatedPool(uint8 indexed poolId, address poolAddress);
    event UpdatedStaderConfig(address staderConfig);
    event ExitValidator(bytes pubkey);
    event ExitOperator(address indexed operator, uint256 totalAmount);

    // returns the details of a specific pool
    function poolAddressById(uint8) external view returns (address poolAddress);

    function poolIdArray(uint256) external view returns (uint8);

    function getPoolIdArray() external view returns (uint8[] memory);

    // Pool functions
    function addNewPool(uint8 _poolId, address _poolAddress) external;

    function updatePoolAddress(uint8 _poolId, address _poolAddress) external;

    function processValidatorExitList(bytes[] calldata _pubkeys) external;

    function processOperatorExit(address _operator, uint256 totalAmount) external;

    function getOperatorTotalNonTerminalKeys(
        uint8 _poolId,
        address _nodeOperator,
        uint256 _startIndex,
        uint256 _endIndex
    ) external view returns (uint256);

    function getSocializingPoolAddress(uint8 _poolId) external view returns (address);

    // Pool getters
    function getProtocolFee(uint8 _poolId) external view returns (uint256); // returns the protocol fee (0-10000)

    function getOperatorFee(uint8 _poolId) external view returns (uint256); // returns the operator fee (0-10000)

    function getTotalActiveValidatorCount() external view returns (uint256); //returns total active validators across all pools

    function getActiveValidatorCountByPool(uint8 _poolId) external view returns (uint256); // returns the total number of active validators in a specific pool

    function getQueuedValidatorCountByPool(uint8 _poolId) external view returns (uint256); // returns the total number of queued validators in a specific pool

    function getCollateralETH(uint8 _poolId) external view returns (uint256);

    function getNodeRegistry(uint8 _poolId) external view returns (address);

    // check for duplicate pubkey across all pools
    function isExistingPubkey(bytes calldata _pubkey) external view returns (bool);

    // check for duplicate operator across all pools
    function isExistingOperator(address _operAddr) external view returns (bool);

    function isExistingPoolId(uint8 _poolId) external view returns (bool);

    function getOperatorPoolId(address _operAddr) external view returns (uint8);

    function getValidatorPoolId(bytes calldata _pubkey) external view returns (uint8);

    function onlyValidName(string calldata _name) external;

    function onlyValidKeys(
        bytes calldata _pubkey,
        bytes calldata _preDepositSignature,
        bytes calldata _depositSignature
    ) external;

    function calculateRewardShare(uint8 _poolId, uint256 _totalRewards)
        external
        view
        returns (
            uint256 userShare,
            uint256 operatorShare,
            uint256 protocolShare
        );
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

import './IStaderConfig.sol';

interface IVaultProxy {
    error CallerNotOwner();
    error AlreadyInitialized();
    event UpdatedOwner(address owner);
    event UpdatedStaderConfig(address staderConfig);

    //Getters
    function vaultSettleStatus() external view returns (bool);

    function isValidatorWithdrawalVault() external view returns (bool);

    function isInitialized() external view returns (bool);

    function poolId() external view returns (uint8);

    function id() external view returns (uint256);

    function owner() external view returns (address);

    function staderConfig() external view returns (IStaderConfig);

    //Setters
    function updateOwner() external;

    function updateStaderConfig(address _staderConfig) external;
}

// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.16;

enum ValidatorStatus {
    INITIALIZED,
    INVALID_SIGNATURE,
    FRONT_RUN,
    PRE_DEPOSIT,
    DEPOSITED,
    WITHDRAWN
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControlUpgradeable {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}

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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/MathUpgradeable.sol";

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Internal function that returns the initialized version. Returns `_initialized`
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Internal function that returns the initialized version. Returns `_initializing`
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library MathUpgradeable {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

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

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

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

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

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

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

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

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

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

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

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0-rc.1) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

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

{
  "remappings": [
    "@chainlink/=node_modules/@chainlink/",
    "@eth-optimism/=node_modules/@eth-optimism/",
    "@openzeppelin/=node_modules/@openzeppelin/",
    "@uniswap/=node_modules/@uniswap/",
    "base64-sol/=node_modules/base64-sol/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "eth-gas-reporter/=node_modules/eth-gas-reporter/",
    "forge-std/=lib/forge-std/src/",
    "hardhat/=node_modules/hardhat/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

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