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/**
 *Submitted for verification at Etherscan.io on 2023-08-07
*/

pragma solidity ^0.5.2;


interface IGovernance {
    function update(address target, bytes calldata data) external;
}



contract Governable {
    IGovernance public governance;

    constructor(address _governance) public {
        governance = IGovernance(_governance);
    }

    modifier onlyGovernance() {
        _assertGovernance();
        _;
    }

    function _assertGovernance() private view {
        require(
            msg.sender == address(governance),
            "Only governance contract is authorized"
        );
    }
}



contract IWithdrawManager {
    function createExitQueue(address token) external;

    function verifyInclusion(
        bytes calldata data,
        uint8 offset,
        bool verifyTxInclusion
    ) external view returns (uint256 age);

    function addExitToQueue(
        address exitor,
        address childToken,
        address rootToken,
        uint256 exitAmountOrTokenId,
        bytes32 txHash,
        bool isRegularExit,
        uint256 priority
    ) external;

    function addInput(
        uint256 exitId,
        uint256 age,
        address utxoOwner,
        address token
    ) external;

    function challengeExit(
        uint256 exitId,
        uint256 inputId,
        bytes calldata challengeData,
        address adjudicatorPredicate
    ) external;
}




contract Registry is Governable {
    // @todo hardcode constants
    bytes32 private constant WETH_TOKEN = keccak256("wethToken");
    bytes32 private constant DEPOSIT_MANAGER = keccak256("depositManager");
    bytes32 private constant STAKE_MANAGER = keccak256("stakeManager");
    bytes32 private constant VALIDATOR_SHARE = keccak256("validatorShare");
    bytes32 private constant WITHDRAW_MANAGER = keccak256("withdrawManager");
    bytes32 private constant CHILD_CHAIN = keccak256("childChain");
    bytes32 private constant STATE_SENDER = keccak256("stateSender");
    bytes32 private constant SLASHING_MANAGER = keccak256("slashingManager");

    address public erc20Predicate;
    address public erc721Predicate;

    mapping(bytes32 => address) public contractMap;
    mapping(address => address) public rootToChildToken;
    mapping(address => address) public childToRootToken;
    mapping(address => bool) public proofValidatorContracts;
    mapping(address => bool) public isERC721;

    enum Type {Invalid, ERC20, ERC721, Custom}
    struct Predicate {
        Type _type;
    }
    mapping(address => Predicate) public predicates;

    event TokenMapped(address indexed rootToken, address indexed childToken);
    event ProofValidatorAdded(address indexed validator, address indexed from);
    event ProofValidatorRemoved(address indexed validator, address indexed from);
    event PredicateAdded(address indexed predicate, address indexed from);
    event PredicateRemoved(address indexed predicate, address indexed from);
    event ContractMapUpdated(bytes32 indexed key, address indexed previousContract, address indexed newContract);

    constructor(address _governance) public Governable(_governance) {}

    function updateContractMap(bytes32 _key, address _address) external onlyGovernance {
        emit ContractMapUpdated(_key, contractMap[_key], _address);
        contractMap[_key] = _address;
    }

    /**
     * @dev Map root token to child token
     * @param _rootToken Token address on the root chain
     * @param _childToken Token address on the child chain
     * @param _isERC721 Is the token being mapped ERC721
     */
    function mapToken(
        address _rootToken,
        address _childToken,
        bool _isERC721
    ) external onlyGovernance {
        require(_rootToken != address(0x0) && _childToken != address(0x0), "INVALID_TOKEN_ADDRESS");
        rootToChildToken[_rootToken] = _childToken;
        childToRootToken[_childToken] = _rootToken;
        isERC721[_rootToken] = _isERC721;
        IWithdrawManager(contractMap[WITHDRAW_MANAGER]).createExitQueue(_rootToken);
        emit TokenMapped(_rootToken, _childToken);
    }

    function addErc20Predicate(address predicate) public onlyGovernance {
        require(predicate != address(0x0), "Can not add null address as predicate");
        erc20Predicate = predicate;
        addPredicate(predicate, Type.ERC20);
    }

    function addErc721Predicate(address predicate) public onlyGovernance {
        erc721Predicate = predicate;
        addPredicate(predicate, Type.ERC721);
    }

    function addPredicate(address predicate, Type _type) public onlyGovernance {
        require(predicates[predicate]._type == Type.Invalid, "Predicate already added");
        predicates[predicate]._type = _type;
        emit PredicateAdded(predicate, msg.sender);
    }

    function removePredicate(address predicate) public onlyGovernance {
        require(predicates[predicate]._type != Type.Invalid, "Predicate does not exist");
        delete predicates[predicate];
        emit PredicateRemoved(predicate, msg.sender);
    }

    function getValidatorShareAddress() public view returns (address) {
        return contractMap[VALIDATOR_SHARE];
    }

    function getWethTokenAddress() public view returns (address) {
        return contractMap[WETH_TOKEN];
    }

    function getDepositManagerAddress() public view returns (address) {
        return contractMap[DEPOSIT_MANAGER];
    }

    function getStakeManagerAddress() public view returns (address) {
        return contractMap[STAKE_MANAGER];
    }

    function getSlashingManagerAddress() public view returns (address) {
        return contractMap[SLASHING_MANAGER];
    }

    function getWithdrawManagerAddress() public view returns (address) {
        return contractMap[WITHDRAW_MANAGER];
    }

    function getChildChainAndStateSender() public view returns (address, address) {
        return (contractMap[CHILD_CHAIN], contractMap[STATE_SENDER]);
    }

    function isTokenMapped(address _token) public view returns (bool) {
        return rootToChildToken[_token] != address(0x0);
    }

    function isTokenMappedAndIsErc721(address _token) public view returns (bool) {
        require(isTokenMapped(_token), "TOKEN_NOT_MAPPED");
        return isERC721[_token];
    }

    function isTokenMappedAndGetPredicate(address _token) public view returns (address) {
        if (isTokenMappedAndIsErc721(_token)) {
            return erc721Predicate;
        }
        return erc20Predicate;
    }

    function isChildTokenErc721(address childToken) public view returns (bool) {
        address rootToken = childToRootToken[childToken];
        require(rootToken != address(0x0), "Child token is not mapped");
        return isERC721[rootToken];
    }
}



contract Initializable {
    bool inited = false;

    modifier initializer() {
        require(!inited, "already inited");
        inited = true;
        
        _;
    }
}




contract IStakeManagerEventsHub {
    struct Validator {
        uint256 amount;
        uint256 reward;
        uint256 activationEpoch;
        uint256 deactivationEpoch;
        uint256 jailTime;
        address signer;
        address contractAddress;
    }

    mapping(uint256 => Validator) public validators;
}

contract EventsHub is Initializable {
    Registry public registry;

    modifier onlyValidatorContract(uint256 validatorId) {
        address _contract;
        (, , , , , , _contract) = IStakeManagerEventsHub(registry.getStakeManagerAddress()).validators(validatorId);
        require(_contract == msg.sender, "not validator");
        _;
    }

    modifier onlyStakeManager() {
        require(registry.getStakeManagerAddress() == msg.sender,
        "Invalid sender, not stake manager");
        _;
    }

    function initialize(Registry _registry) external initializer {
        registry = _registry;
    }

    event ShareBurnedWithId(
        uint256 indexed validatorId,
        address indexed user,
        uint256 indexed amount,
        uint256 tokens,
        uint256 nonce
    );

    function logShareBurnedWithId(
        uint256 validatorId,
        address user,
        uint256 amount,
        uint256 tokens,
        uint256 nonce
    ) public onlyValidatorContract(validatorId) {
        emit ShareBurnedWithId(validatorId, user, amount, tokens, nonce);
    }

    event DelegatorUnstakeWithId(
        uint256 indexed validatorId,
        address indexed user,
        uint256 amount,
        uint256 nonce
    );

    function logDelegatorUnstakedWithId(
        uint256 validatorId,
        address user,
        uint256 amount,
        uint256 nonce
    ) public onlyValidatorContract(validatorId) {
        emit DelegatorUnstakeWithId(validatorId, user, amount, nonce);
    }

    event RewardParams(
        uint256 rewardDecreasePerCheckpoint,
        uint256 maxRewardedCheckpoints,
        uint256 checkpointRewardDelta
    );

    function logRewardParams(
        uint256 rewardDecreasePerCheckpoint,
        uint256 maxRewardedCheckpoints,
        uint256 checkpointRewardDelta
    ) public onlyStakeManager {
        emit RewardParams(rewardDecreasePerCheckpoint, maxRewardedCheckpoints, checkpointRewardDelta);
    }

    event UpdateCommissionRate(
        uint256 indexed validatorId,
        uint256 indexed newCommissionRate,
        uint256 indexed oldCommissionRate
    );

    function logUpdateCommissionRate(
        uint256 validatorId,
        uint256 newCommissionRate,
        uint256 oldCommissionRate
    ) public onlyStakeManager {
        emit UpdateCommissionRate(
            validatorId,
            newCommissionRate,
            oldCommissionRate
        );
    }

    event SharesTransfer(
        uint256 indexed validatorId,
        address indexed from,
        address indexed to,
        uint256 value
    );

    function logSharesTransfer(
        uint256 validatorId,
        address from,
        address to,
        uint256 value
    ) public onlyValidatorContract(validatorId) {
        emit SharesTransfer(validatorId, from, to, value);
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"DelegatorUnstakeWithId","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"rewardDecreasePerCheckpoint","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"maxRewardedCheckpoints","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"checkpointRewardDelta","type":"uint256"}],"name":"RewardParams","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"tokens","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"ShareBurnedWithId","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"SharesTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"validatorId","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"newCommissionRate","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"oldCommissionRate","type":"uint256"}],"name":"UpdateCommissionRate","type":"event"},{"constant":false,"inputs":[{"internalType":"contract Registry","name":"_registry","type":"address"}],"name":"initialize","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"},{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"logDelegatorUnstakedWithId","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"rewardDecreasePerCheckpoint","type":"uint256"},{"internalType":"uint256","name":"maxRewardedCheckpoints","type":"uint256"},{"internalType":"uint256","name":"checkpointRewardDelta","type":"uint256"}],"name":"logRewardParams","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"},{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"tokens","type":"uint256"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"logShareBurnedWithId","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"},{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"logSharesTransfer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"validatorId","type":"uint256"},{"internalType":"uint256","name":"newCommissionRate","type":"uint256"},{"internalType":"uint256","name":"oldCommissionRate","type":"uint256"}],"name":"logUpdateCommissionRate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"registry","outputs":[{"internalType":"contract Registry","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}]

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