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// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;

import "./IOperationalStaking.sol";
import "@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";

contract BlockSpecimenProofChain is OwnableUpgradeable {
    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;
    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.Bytes32Set;

    IOperationalStaking _stakingInterface; // staking contract (deprecated)

    bytes32 public constant GOVERNANCE_ROLE = keccak256("GOVERNANCE_ROLE");
    bytes32 public constant BLOCK_SPECIMEN_PRODUCER_ROLE = keccak256("BLOCK_SPECIMEN_PRODUCER_ROLE");
    bytes32 public constant AUDITOR_ROLE = keccak256("AUDITOR_ROLE");
    uint256 private constant _DIVIDER = 10 ** 18; // 18 decimals used for scaling

    uint256 private _blockSpecimenQuorum; // The value is represented as a uint <= 10**18. The threshold value will later be divided by 10**18 to represent it as a percentage.  e.g.) 10**18 == 100%; 5 * 10**17 == 50%;
    uint256 private _secondsPerBlockCurrentChain; // average block time on the chain where the ProofChain is deployed
    uint128 private _blockSpecimenRewardAllocation; // the reward allocated per block hash
    uint128 private _bspRequiredStake; // how much a validator should have staked in order to run an operator
    uint64 private _blockSpecimenSessionDuration; // the length of a session in blocks
    uint64 private _minSubmissionsRequired; // min number of participants who submitted the agreed specimen hash in order for the quorum to be achieved

    EnumerableSetUpgradeable.Bytes32Set private _roleNames; // set of all role names

    EnumerableSetUpgradeable.AddressSet private _blockSpecimenProducers; // currently enabled block specimen producer operators
    EnumerableSetUpgradeable.AddressSet private _governors; // governor operators
    EnumerableSetUpgradeable.AddressSet private _auditors; // auditor operators

    mapping(address => uint128) public validatorIDs; // maps an operator address to validatorId
    mapping(uint128 => EnumerableSetUpgradeable.AddressSet) private _validatorOperators; // operator addresses that validator owns
    mapping(address => bytes32) public operatorRoles; // operator address => role
    mapping(uint128 => uint128) private _validatorActiveOperatorsCounters; // how many operators are enabled per validator given validator id
    mapping(uint64 => mapping(uint64 => BlockSpecimenSession)) private _sessions; // chainId => blockHeight
    mapping(uint64 => ChainData) private _chainData; // by chain id

    mapping(bytes32 => string[]) private _urls; // hash => urls
    mapping(uint128 => address) private _validatorAddresses; // validatorId => validator address (deprecated)
    mapping(uint128 => bool) private _validatorEnabled; // validatorId => enabled?
    address private _stakingManager;

    struct ChainData {
        uint256 blockOnTargetChain; // block number on the chain for which BSP are produced which is mapped to the current chain block
        uint256 blockOnCurrentChain; // block number on the chain where the ProofChain is deployed. it is mapped to the target chain block
        uint256 secondsPerBlockTargetChain; // average block time on the chain for which BSP is generated
        uint128 allowedThreshold; // block offsett threshold, used to handle minor de-synchronization over time
        uint128 maxSubmissionsPerBlockHeight; // max number of block hashes allowed to submit per block height
        uint64 nthBlock; // block divisor
    }

    struct BlockProperties {
        mapping(bytes32 => address[]) participants; // specimen hash => operators who submitted the specimen hash
        bytes32[] specimenHashes; // raw specimen hashes
    }

    struct SessionParticipantData {
        uint128 stake; // stake at the time when an operator submitted the first specimen hash (deprecate now (always 0))
        uint128 submissionCounter; // how many specimen hashes an operator has submitted
    }

    struct BlockSpecimenSession {
        mapping(bytes32 => BlockProperties) blockProperties; // block hash => block properties
        bytes32[] blockHashesRaw;
        mapping(address => SessionParticipantData) participantsData; // stake and submission counter, pack these together to save gas
        uint64 sessionDeadline; // the last block when an operator can submit a specimen hash
        bool isSessionDone; // marker for session finalization
    }

    event OperatorAdded(address operator, uint128 validatorId, bytes32 role);

    event OperatorRemoved(address operator, uint128 validatorId, uint128 activeOperatorCount, bytes32 role);

    event ValidatorEnabled(uint128 validatorId);

    event ValidatorDisabled(uint128 validatorId);

    event BlockSpecimenProductionProofSubmitted(
        uint64 chainId,
        uint64 blockHeight,
        bytes32 blockHash,
        bytes32 specimenHash, // SHA-256 content-hash of specimen object file;
        string storageURL // URL of specimen storage
    );

    event SessionStarted(uint64 indexed chainId, uint64 indexed blockHeight, uint64 deadline);

    event QuorumNotReached(uint64 indexed chainId, uint64 blockHeight);

    event BlockSpecimenRewardChanged(uint128 newBlockSpecimenRewardAllocation);

    event MinimumRequiredStakeChanged(uint128 newStakeRequirement);

    event StakingManagerChanged(address newStakingManager);

    event SpecimenSessionQuorumChanged(uint256 newQuorumThreshold);

    event SpecimenSessionDurationChanged(uint64 newSessionDuration);

    event SpecimenSessionMinSubmissionChanged(uint64 minSubmissions);

    event NthBlockChanged(uint64 indexed chainId, uint64 indexed nthBlock);

    event MaxSubmissionsPerBlockHeightChanged(uint256 maxSubmissions);

    event ChainSyncDataChanged(uint64 indexed chainId, uint256 blockOnTargetChain, uint256 blockOnCurrentChain, uint256 secondsPerBlockTargetChain);

    event SecondsPerBlockCurrentChainChanged(uint64 indexed secondsPerBlockCurrentChain);

    event BlockHeightSubmissionThresholdChanged(uint64 indexed chainId, uint64 threshold);

    event BlockSpecimenQuorum(uint64 indexed chainId, uint64 indexed blockHeight, uint256 validatorBitMap, bytes32 indexed blockHash, bytes32 specimenHash);

    modifier onlyGovernor() {
        require(_governors.contains(msg.sender), "Sender is not GOVERNANCE_ROLE");
        _;
    }

    modifier onlyStakingManager() {
        require(msg.sender == _stakingManager, "Sender is not staking manager");
        _;
    }

    function initialize(address initialGovernor, address stakingManager) public initializer {
        require(initialGovernor != address(0), "Invalid governor address");
        __Ownable_init();

        _governors.add(msg.sender);

        _roleNames.add(GOVERNANCE_ROLE);
        _roleNames.add(BLOCK_SPECIMEN_PRODUCER_ROLE);
        _roleNames.add(AUDITOR_ROLE);

        setQuorumThreshold(_DIVIDER / 2); // 50%
        setBlockSpecimenReward(10 ** 14); // 0.0001
        setBlockSpecimenSessionDuration(240); // blocks
        setMinSubmissionsRequired(2);
        setStakingManagerAddress(stakingManager);
        _governors.remove(msg.sender);

        operatorRoles[initialGovernor] = GOVERNANCE_ROLE;
        _governors.add(initialGovernor);
        emit OperatorAdded(initialGovernor, 0, GOVERNANCE_ROLE);
    }

    function disableValidator(uint128 validatorId) external onlyStakingManager {
        // when remove/disable bsp is called, it emits an event, which might then cause bridge agent to
        // disable this.
        require(validatorId < 256, "validatorId out of range");
        _validatorEnabled[validatorId] = false;
        emit ValidatorDisabled(validatorId);
    }

    /**
     * Enables the given operator on the staking contract
     */
    function enableValidator(uint128 validatorId) external onlyStakingManager {
        // when addBsp is done, it emits an event, which might then cause bridge agent
        // to enable this.
        require(validatorId < 256, "validatorId out of range");
        _validatorEnabled[validatorId] = true;
        emit ValidatorEnabled(validatorId);
    }

    /**
     * Disables the operator instance.
     * If all addresses of the operator are disabled, then the operator (validator) instance will get disabled on the staking contract
     */
    function _removeBSPOperatorFromActiveInstances(address operator) internal {
        _blockSpecimenProducers.remove(operator);
        uint128 validatorId = validatorIDs[operator];
        _validatorActiveOperatorsCounters[validatorId]--;
    }

    /**
     * Adds the given address to the block specimen producers set
     */
    function addBSPOperator(address operator, uint128 validatorId) external onlyGovernor {
        require(operator != address(0), "Invalid operator address");
        require(operatorRoles[operator] == 0, "Operator already exists");
        require(validatorId <= 255, "Validator ID cannot be greater than 255");
        operatorRoles[operator] = BLOCK_SPECIMEN_PRODUCER_ROLE;
        validatorIDs[operator] = validatorId;
        _validatorOperators[validatorId].add(operator);

        _blockSpecimenProducers.add(operator);
        _validatorActiveOperatorsCounters[validatorId]++;
        emit OperatorAdded(operator, validatorId, BLOCK_SPECIMEN_PRODUCER_ROLE);
    }

    /**
     * Removes the given address from the block specimen producers set
     */
    function removeBSPOperator(address operator) external onlyGovernor {
        require(operatorRoles[operator] == BLOCK_SPECIMEN_PRODUCER_ROLE, "Operator is not BSP");
        require(_blockSpecimenProducers.contains(operator), "Operator not found in active instances");
        _removeBSPOperatorFromActiveInstances(operator);
        uint128 validatorID = validatorIDs[operator];
        _validatorOperators[validatorID].remove(operator);
        validatorIDs[operator] = 0;
        operatorRoles[operator] = 0;
        emit OperatorRemoved(operator, validatorID, _validatorActiveOperatorsCounters[validatorID], BLOCK_SPECIMEN_PRODUCER_ROLE);
    }

    /**
     * Adds the given address to the auditors set
     */
    function addAuditor(address auditor) external onlyGovernor {
        require(auditor != address(0), "Invalid auditor address");
        require(operatorRoles[auditor] == 0, "Operator already exists");
        operatorRoles[auditor] = AUDITOR_ROLE;
        _auditors.add(auditor);
        emit OperatorAdded(auditor, 0, AUDITOR_ROLE);
    }

    /**
     * Removes the given address from the auditors set
     */
    function removeAuditor(address auditor) external onlyGovernor {
        require(operatorRoles[auditor] == AUDITOR_ROLE, "Operator is not auditor");
        operatorRoles[auditor] = 0;
        _auditors.remove(auditor);
        emit OperatorRemoved(auditor, 0, 0, AUDITOR_ROLE);
    }

    /**
     * Adds the given address to the governors set
     */
    function addGovernor(address governor) external onlyOwner {
        require(governor != address(0), "Invalid governor address");
        require(operatorRoles[governor] == 0, "Operator already exists");
        operatorRoles[governor] = GOVERNANCE_ROLE;
        _governors.add(governor);
        emit OperatorAdded(governor, 0, GOVERNANCE_ROLE);
    }

    /**
     * Removes the given address from the governors set
     */
    function removeGovernor(address governor) external onlyOwner {
        require(operatorRoles[governor] == GOVERNANCE_ROLE, "Operator is not governor");
        operatorRoles[governor] = 0;
        _governors.remove(governor);
        emit OperatorRemoved(governor, 0, 0, GOVERNANCE_ROLE);
    }

    /**
     * Updates the address of the staking manager
     */
    function setStakingManagerAddress(address stakingManagerAddress) public onlyGovernor {
        require(stakingManagerAddress != address(0), "Invalid address");
        _stakingManager = stakingManagerAddress;
        emit StakingManagerChanged(stakingManagerAddress);
    }

    /**
     * Update the Block Specimen Quorum Threshold.
     */
    function setQuorumThreshold(uint256 quorum) public onlyGovernor {
        require(quorum <= _DIVIDER, "Quorum cannot be greater than 100%");
        _blockSpecimenQuorum = quorum;
        emit SpecimenSessionQuorumChanged(quorum);
    }

    /**
     * Update block divisor
     */
    function setNthBlock(uint64 chainId, uint64 n) public onlyGovernor {
        require(n > 0, "Nth block cannot be 0");
        _chainData[chainId].nthBlock = n;
        emit NthBlockChanged(chainId, n);
    }

    /**
     * Update the reward allocation per block specimen.
     */
    function setBlockSpecimenReward(uint128 newBlockSpecimenReward) public onlyGovernor {
        require(newBlockSpecimenReward <= 1000 * _DIVIDER, "Block specimen reward cannot be greater than 1000*DIVIDER");
        _blockSpecimenRewardAllocation = newBlockSpecimenReward;
        emit BlockSpecimenRewardChanged(newBlockSpecimenReward);
    }

    /**
     * Update the duration of a specimen session in blocks
     */
    function setBlockSpecimenSessionDuration(uint64 newSessionDuration) public onlyGovernor {
        require(newSessionDuration > 0, "Session duration cannot be 0");
        _blockSpecimenSessionDuration = newSessionDuration;
        emit SpecimenSessionDurationChanged(newSessionDuration);
    }

    /**
     * Update the minimum # of submissions required in order to reach quorum
     */
    function setMinSubmissionsRequired(uint64 minSubmissions) public onlyGovernor {
        require(minSubmissions >= 1, "Minimum submissions must be at least 1");
        require(minSubmissions <= 255, "Maximum allowed minimum submissions is 255");
        _minSubmissionsRequired = minSubmissions;
        emit SpecimenSessionMinSubmissionChanged(minSubmissions);
    }

    /**
     * Update the max # of submissions per operator per block height
     */
    function setMaxSubmissionsPerBlockHeight(uint64 chainId, uint64 maxSubmissions) public onlyGovernor {
        require(maxSubmissions > 0, "Max submissions cannot be 0");
        require(maxSubmissions <= 3, "Max submissions cannot be more than 3");
        require(_chainData[chainId].nthBlock != 0, "Invalid chain ID");
        _chainData[chainId].maxSubmissionsPerBlockHeight = maxSubmissions;
        emit MaxSubmissionsPerBlockHeightChanged(maxSubmissions);
    }

    /**
     * Update chain sync data
     */
    function setChainSyncData(uint64 chainId, uint256 blockOnTargetChain, uint256 blockOnCurrentChain, uint256 secondsPerBlockTargetChain) external onlyGovernor {
        ChainData storage cd = _chainData[chainId];
        require(secondsPerBlockTargetChain > 0, "Seconds per block cannot be 0");
        cd.blockOnTargetChain = blockOnTargetChain;
        cd.blockOnCurrentChain = blockOnCurrentChain;
        cd.secondsPerBlockTargetChain = secondsPerBlockTargetChain;
        emit ChainSyncDataChanged(chainId, blockOnTargetChain, blockOnCurrentChain, secondsPerBlockTargetChain);
    }

    /**
     * Update block height submission threshold for live sync
     */
    function setBlockHeightSubmissionsThreshold(uint64 chainId, uint64 threshold) external onlyGovernor {
        require(threshold > 0, "Threshold cannot be 0");
        _chainData[chainId].allowedThreshold = threshold;
        emit BlockHeightSubmissionThresholdChanged(chainId, threshold);
    }

    /**
     * Update seconds per block on the chain where the ProofChain is deployed
     */
    function setSecondsPerBlockCurrentChain(uint64 secondsPerBlockCurrentChain) external onlyGovernor {
        require(secondsPerBlockCurrentChain > 0, "Seconds per block cannot be 0");
        _secondsPerBlockCurrentChain = secondsPerBlockCurrentChain;
        emit SecondsPerBlockCurrentChainChanged(secondsPerBlockCurrentChain);
    }

    /**
     * Block Specimen Producers submit their block specimen proofs using this function.
     */
    function submitBlockSpecimenProof(uint64 chainId, uint64 blockHeight, bytes32 blockHash, bytes32 specimenHash, string calldata storageURL) external {
        require(_isValidBlockHash(blockHash), "Invalid block hash");
        require(_isValidSpecimenHash(specimenHash), "Invalid specimen hash");
        require(_isValidStorageURL(storageURL), "Invalid storage URL");
        require(_blockSpecimenProducers.contains(msg.sender), "Sender is not BLOCK_SPECIMEN_PRODUCER_ROLE");
        ChainData storage cd = _chainData[chainId];
        require(cd.nthBlock != 0, "Invalid chain ID");
        require(blockHeight % cd.nthBlock == 0, "Invalid block height");

        BlockSpecimenSession storage session = _sessions[chainId][blockHeight];
        uint64 sessionDeadline = session.sessionDeadline;
        SessionParticipantData storage participantsData = session.participantsData[msg.sender];

        // if this is the first specimen to be submitted for a block, initialize a new session
        if (sessionDeadline == 0) {
            require(!session.isSessionDone, "Session submissions have closed");

            uint256 currentBlockOnTargetChain = cd.blockOnTargetChain + (((block.number - cd.blockOnCurrentChain) * _secondsPerBlockCurrentChain) / cd.secondsPerBlockTargetChain);
            uint256 lowerBound = currentBlockOnTargetChain >= cd.allowedThreshold ? currentBlockOnTargetChain - (cd.allowedThreshold / 2) : 0;
            uint256 upperBound = currentBlockOnTargetChain + (cd.allowedThreshold / 2);
            require(lowerBound <= blockHeight && blockHeight <= upperBound, "Block height is out of bounds for live sync");
            session.sessionDeadline = uint64(block.number + _blockSpecimenSessionDuration);

            emit SessionStarted(chainId, blockHeight, session.sessionDeadline);

            uint128 validatorID = validatorIDs[msg.sender];

            require(_validatorEnabled[validatorID], "Validator is not enabled");

            session.blockHashesRaw.push(blockHash);
            BlockProperties storage bh = session.blockProperties[blockHash];
            bh.specimenHashes.push(specimenHash);

            bh.participants[specimenHash].push(msg.sender);
            participantsData.submissionCounter++;
        } else {
            require(block.number <= sessionDeadline, "Session submissions have closed");
            require(participantsData.submissionCounter < cd.maxSubmissionsPerBlockHeight, "Max submissions limit exceeded");

            BlockProperties storage bh = session.blockProperties[blockHash];
            bytes32[] storage specimenHashes = bh.specimenHashes;

            uint128 validatorID = validatorIDs[msg.sender];
            require(_validatorEnabled[validatorID], "Validator is not enabled");

            // check if it was submitted for the same block hash
            // this should be at about (nValidators * maxSubmissionsPerBlockHeight) iterations
            // which would typically be less than 50
            for (uint256 j = 0; j < specimenHashes.length && j < 50; j++) {
                address[] storage specimenHashParticipants = bh.participants[specimenHashes[j]];
                for (uint256 k = 0; k < specimenHashParticipants.length; k++)
                    require(specimenHashParticipants[k] != msg.sender, "Operator already submitted for the provided block hash");
            }

            address[] storage participants = bh.participants[specimenHash];
            if (specimenHashes.length != 0) {
                if (participants.length == 0) specimenHashes.push(specimenHash);
            } else {
                session.blockHashesRaw.push(blockHash);
                specimenHashes.push(specimenHash);
            }

            participants.push(msg.sender);
            participantsData.submissionCounter++;
        }
        _urls[specimenHash].push(storageURL);

        emit BlockSpecimenProductionProofSubmitted(chainId, blockHeight, blockHash, specimenHash, storageURL);
    }

    /**
     * This is the new finalize function that works with staking contract in ethereum
     */
    function finalizeSpecimenSession(uint64 chainId, uint64 blockHeight) public {
        BlockSpecimenSession storage session = _sessions[chainId][blockHeight];
        uint64 sessionDeadline = session.sessionDeadline;
        require(block.number > sessionDeadline, "Session not past deadline");
        require(!session.isSessionDone, "Session cannot be finalized");
        require(sessionDeadline != 0, "Session not started");

        uint256 contributorsN;
        bytes32 specimenHash;

        uint256 max;
        bytes32 agreedBlockHash;
        bytes32 agreedSpecimenHash;

        bytes32[] storage blockHashesRaw = session.blockHashesRaw;
        bytes32 rawBlockHash;
        uint256 blockSpecimenHashesLength = blockHashesRaw.length;

        // find the block hash and specimen hashes that the quorum agrees on by finding the specimen hash with the highest number of participants
        for (uint256 i = 0; i < blockSpecimenHashesLength; i++) {
            rawBlockHash = blockHashesRaw[i];
            BlockProperties storage bh = session.blockProperties[rawBlockHash];
            for (uint256 j = 0; j < bh.specimenHashes.length; j++) {
                specimenHash = bh.specimenHashes[j];
                uint256 len = bh.participants[specimenHash].length;
                contributorsN += len;
                if (len > max) {
                    max = len;
                    agreedBlockHash = rawBlockHash;
                    agreedSpecimenHash = specimenHash;
                }
            }
        }
        // check if the number of submissions is sufficient and if the quorum is achieved
        if (_minSubmissionsRequired <= max && (max * _DIVIDER) / contributorsN >= _blockSpecimenQuorum) {
            _finalizeWithParticipants(session, chainId, blockHeight, agreedBlockHash, agreedSpecimenHash);
        } else emit QuorumNotReached(chainId, blockHeight);

        // prevent further session finalization calls
        session.isSessionDone = true;
        session.sessionDeadline = 0;
    }

    function _finalizeWithParticipants(BlockSpecimenSession storage session, uint64 chainId, uint64 blockHeight, bytes32 agreedBlockHash, bytes32 agreedSpecimenHash) internal {
        address[] storage participants = session.blockProperties[agreedBlockHash].participants[agreedSpecimenHash];
        uint256 validatorBitMap; // sets the ith bit to 1 if the ith validator submits the agreed specimen hash

        mapping(address => SessionParticipantData) storage participantsData = session.participantsData;

        for (uint256 i = 0; i < participants.length; i++) {
            address participant = participants[i];
            SessionParticipantData storage pd = participantsData[participant];
            validatorBitMap |= (1 << (255 - validatorIDs[participant]));
            // release gas if possible
            if (pd.submissionCounter > 0) {
                pd.submissionCounter = 0;
            }
        }

        emit BlockSpecimenQuorum(chainId, blockHeight, validatorBitMap, agreedBlockHash, agreedSpecimenHash);

        // release gas
        // clear blockProperties map
        for (uint256 i = 0; i < session.blockHashesRaw.length; i++) {
            bytes32 key = session.blockHashesRaw[i];
            BlockProperties storage bp = session.blockProperties[key];

            for (uint256 j = 0; j < bp.specimenHashes.length; j++) {
                bytes32 specimenHash = bp.specimenHashes[j];

                address[] memory participantsTemp = bp.participants[specimenHash];
                for (uint256 k = 0; k < participantsTemp.length; k++) {
                    delete session.participantsData[participantsTemp[k]];
                }

                delete bp.participants[specimenHash];
            }

            delete session.blockProperties[session.blockHashesRaw[i]];
        }

        delete session.blockHashesRaw;
    }

    /**
     * Returns contract meta data
     */
    function getMetadata()
        public
        view
        returns (
            address stakingManager,
            uint128 blockSpecimenRewardAllocation,
            uint64 blockSpecimenSessionDuration,
            uint64 minSubmissionsRequired,
            uint256 blockSpecimenQuorum,
            uint256 secondsPerBlockCurrentChain
        )
    {
        return (
            address(_stakingManager),
            _blockSpecimenRewardAllocation,
            _blockSpecimenSessionDuration,
            _minSubmissionsRequired,
            _blockSpecimenQuorum,
            _secondsPerBlockCurrentChain
        );
    }

    /**
     * Returns data used for chain sync
     */
    function getChainData(
        uint64 chainId
    )
        external
        view
        returns (
            uint256 blockOnTargetChain,
            uint256 blockOnCurrentChain,
            uint256 secondsPerBlockTargetChain,
            uint128 allowedThreshold,
            uint128 maxSubmissionsPerBlockHeight,
            uint64 nthBlock
        )
    {
        ChainData memory cd = _chainData[chainId];
        return (cd.blockOnTargetChain, cd.blockOnCurrentChain, cd.secondsPerBlockTargetChain, cd.allowedThreshold, cd.maxSubmissionsPerBlockHeight, cd.nthBlock);
    }

    /**
     * Returns all bsp operator addresses (disabled and enabled) of a given validator
     */
    function getOperators(uint128 validatorId) external view returns (address[] memory) {
        return _validatorOperators[validatorId].values();
    }

    /**
     * Returns all enabled operators by role type
     */
    function getAllOperators() external view returns (address[] memory _bsps, address[] memory __governors, address[] memory __auditors) {
        return (_blockSpecimenProducers.values(), _governors.values(), _auditors.values());
    }

    /**
     * returns enabled operator count for a validator
     */
    function getEnabledOperatorCount(uint128 validatorId) external view returns (uint128) {
        return _validatorActiveOperatorsCounters[validatorId];
    }

    /**
     * Returns required stake and enabled block specimen producer operators
     */
    function getBSPRoleData() external view returns (uint128 requiredStake, address[] memory activeMembers) {
        return (_bspRequiredStake, _blockSpecimenProducers.values());
    }

    /**
     * Returns true if the given operator is enabled.
     * Returns false if the operator is disabled or does not exist
     */
    function isEnabled(address operator) external view returns (bool) {
        return _blockSpecimenProducers.contains(operator);
    }

    /**
     * Returns true if the given validator is enabled.
     * Returns false if the validator is disabled or does not exist
     */
    function isValidatorEnabled(uint128 validatorId) external view returns (bool) {
        return _validatorEnabled[validatorId];
    }

    /**
     * Returns IPFS urls where specimens reside
     */
    function getURLS(bytes32 specimenhash) external view returns (string[] memory) {
        return _urls[specimenhash];
    }

    /**
     * This function is called to check whether the sesion is open for the given chain id and block height
     */
    function isSessionOpen(uint64 chainId, uint64 blockHeight, address operator) public view returns (bool) {
        BlockSpecimenSession storage session = _sessions[chainId][blockHeight];
        uint64 sessionDeadline = session.sessionDeadline;
        SessionParticipantData storage participantsData = session.participantsData[operator];
        bool submissionLimitExceeded = participantsData.submissionCounter == _chainData[chainId].maxSubmissionsPerBlockHeight;
        return (!submissionLimitExceeded && block.number <= sessionDeadline) || (sessionDeadline == 0 && !session.isSessionDone);
    }

    function _isValidBlockHash(bytes32 blockHash) internal pure returns (bool) {
        bytes32 zeroHash = bytes32(0);
        // Check if the input is a valid hash
        require(blockHash != zeroHash, "Invalid block hash");
        return true;
    }

    function _isValidSpecimenHash(bytes32 specimenHash) internal pure returns (bool) {
        bytes32 zeroHash = bytes32(0);
        // Check if the input is a valid hash
        require(specimenHash != zeroHash, "Invalid specimen hash");
        return true;
    }

    function _isValidStorageURL(string memory storageURL) internal pure returns (bool) {
        // Check if the input is not an empty string
        return bytes(storageURL).length > 0;
    }
}

//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.13;

// blank interface contract which earlier at interface of OperationalStaking.sol which needed to be exposed to proof chain contracts.
// but now this is not needed anymore -- the functions are removed, but due to the upgrade rules of smart contract, we cannot remove the interface.
interface IOperationalStaking {}

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

pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 *
 * [WARNING]
 * ====
 *  Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable.
 *  See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info.
 *
 *  In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet.
 * ====
 */
library EnumerableSetUpgradeable {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastValue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastValue;
                // Update the index for the moved value
                set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        /// @solidity memory-safe-assembly
        assembly {
            result := store
        }

        return result;
    }
}

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

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 v4.7.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

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

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

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

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

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

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

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

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

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

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

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

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

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

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

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

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

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

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

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

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

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly
                /// @solidity memory-safe-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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":false,"inputs":[{"indexed":false,"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"ValidatorEnabled","type":"event"},{"inputs":[],"name":"AUDITOR_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"BLOCK_SPECIMEN_PRODUCER_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"GOVERNANCE_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"auditor","type":"address"}],"name":"addAuditor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"addBSPOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"governor","type":"address"}],"name":"addGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"disableValidator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"enableValidator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint64","name":"blockHeight","type":"uint64"}],"name":"finalizeSpecimenSession","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAllOperators","outputs":[{"internalType":"address[]","name":"_bsps","type":"address[]"},{"internalType":"address[]","name":"__governors","type":"address[]"},{"internalType":"address[]","name":"__auditors","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBSPRoleData","outputs":[{"internalType":"uint128","name":"requiredStake","type":"uint128"},{"internalType":"address[]","name":"activeMembers","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"}],"name":"getChainData","outputs":[{"internalType":"uint256","name":"blockOnTargetChain","type":"uint256"},{"internalType":"uint256","name":"blockOnCurrentChain","type":"uint256"},{"internalType":"uint256","name":"secondsPerBlockTargetChain","type":"uint256"},{"internalType":"uint128","name":"allowedThreshold","type":"uint128"},{"internalType":"uint128","name":"maxSubmissionsPerBlockHeight","type":"uint128"},{"internalType":"uint64","name":"nthBlock","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"getEnabledOperatorCount","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMetadata","outputs":[{"internalType":"address","name":"stakingManager","type":"address"},{"internalType":"uint128","name":"blockSpecimenRewardAllocation","type":"uint128"},{"internalType":"uint64","name":"blockSpecimenSessionDuration","type":"uint64"},{"internalType":"uint64","name":"minSubmissionsRequired","type":"uint64"},{"internalType":"uint256","name":"blockSpecimenQuorum","type":"uint256"},{"internalType":"uint256","name":"secondsPerBlockCurrentChain","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"getOperators","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"specimenhash","type":"bytes32"}],"name":"getURLS","outputs":[{"internalType":"string[]","name":"","type":"string[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"initialGovernor","type":"address"},{"internalType":"address","name":"stakingManager","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"}],"name":"isEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint64","name":"blockHeight","type":"uint64"},{"internalType":"address","name":"operator","type":"address"}],"name":"isSessionOpen","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint128","name":"validatorId","type":"uint128"}],"name":"isValidatorEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"operatorRoles","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"auditor","type":"address"}],"name":"removeAuditor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"}],"name":"removeBSPOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"governor","type":"address"}],"name":"removeGovernor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint64","name":"threshold","type":"uint64"}],"name":"setBlockHeightSubmissionsThreshold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint128","name":"newBlockSpecimenReward","type":"uint128"}],"name":"setBlockSpecimenReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"newSessionDuration","type":"uint64"}],"name":"setBlockSpecimenSessionDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint256","name":"blockOnTargetChain","type":"uint256"},{"internalType":"uint256","name":"blockOnCurrentChain","type":"uint256"},{"internalType":"uint256","name":"secondsPerBlockTargetChain","type":"uint256"}],"name":"setChainSyncData","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint64","name":"maxSubmissions","type":"uint64"}],"name":"setMaxSubmissionsPerBlockHeight","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"minSubmissions","type":"uint64"}],"name":"setMinSubmissionsRequired","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint64","name":"n","type":"uint64"}],"name":"setNthBlock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"quorum","type":"uint256"}],"name":"setQuorumThreshold","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"secondsPerBlockCurrentChain","type":"uint64"}],"name":"setSecondsPerBlockCurrentChain","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"stakingManagerAddress","type":"address"}],"name":"setStakingManagerAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint64","name":"chainId","type":"uint64"},{"internalType":"uint64","name":"blockHeight","type":"uint64"},{"internalType":"bytes32","name":"blockHash","type":"bytes32"},{"internalType":"bytes32","name":"specimenHash","type":"bytes32"},{"internalType":"string","name":"storageURL","type":"string"}],"name":"submitBlockSpecimenProof","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"validatorIDs","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"}]

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