pragma solidity >=0.4.21 <0.7.0;


/// @title Contract to reward overlapping stakes
/// @author Marlin
/// @notice Use this contract only for testing
/// @dev Contract may or may not change in future (depending upon the new slots in proxy-store)
contract StakeManagerProxy {
    bytes32 internal constant IMPLEMENTATION_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.implementation")) - 1
    );
    bytes32 internal constant PROXY_ADMIN_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.admin")) - 1
    );

    constructor(address contractLogic, address proxyAdmin) public {
        // save the code address
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, contractLogic)
        }
        // save the proxy admin
        slot = PROXY_ADMIN_SLOT;
        address sender = proxyAdmin;
        assembly {
            sstore(slot, sender)
        }
    }

    function updateAdmin(address _newAdmin) public {
        require(
            msg.sender == getAdmin(),
            "Only the current admin should be able to new admin"
        );
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            sstore(slot, _newAdmin)
        }
    }

    /// @author Marlin
    /// @dev Only admin can update the contract
    /// @param _newLogic address is the address of the contract that has to updated to
    function updateLogic(address _newLogic) public {
        require(
            msg.sender == getAdmin(),
            "Only Admin should be able to update the contracts"
        );
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, _newLogic)
        }
    }

    /// @author Marlin
    /// @dev use assembly as contract store slot is manually decided
    function getAdmin() internal view returns (address result) {
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            result := sload(slot)
        }
    }

    /// @author Marlin
    /// @dev add functionality to forward the balance as well.
    function() external payable {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            let contractLogic := sload(slot)
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)

            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

pragma solidity >=0.4.21 <0.7.0;


/// @title Contract to reward overlapping stakes
/// @author Marlin
/// @notice Use this contract only for testing
/// @dev Contract may or may not change in future (depending upon the new slots in proxy-store)
contract TokenProxy {
    bytes32 internal constant IMPLEMENTATION_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.implementation")) - 1
    );
    bytes32 internal constant PROXY_ADMIN_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.admin")) - 1
    );

    constructor(address contractLogic, address proxyAdmin) public {
        // save the code address
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, contractLogic)
        }
        // save the proxy admin
        slot = PROXY_ADMIN_SLOT;
        address sender = proxyAdmin;
        assembly {
            sstore(slot, sender)
        }
    }

    function updateAdmin(address _newAdmin) public {
        require(
            msg.sender == getAdmin(),
            "Only the current admin should be able to new admin"
        );
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            sstore(slot, _newAdmin)
        }
    }

    /// @author Marlin
    /// @dev Only admin can update the contract
    /// @param _newLogic address is the address of the contract that has to updated to
    function updateLogic(address _newLogic) public {
        require(
            msg.sender == getAdmin(),
            "Only Admin should be able to update the contracts"
        );
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, _newLogic)
        }
    }

    /// @author Marlin
    /// @dev use assembly as contract store slot is manually decided
    function getAdmin() internal view returns (address result) {
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            result := sload(slot)
        }
    }

    /// @author Marlin
    /// @dev add functionality to forward the balance as well.
    function() external payable {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            let contractLogic := sload(slot)
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)

            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

pragma solidity >=0.4.21 <0.7.0;


/// @title Contract to reward overlapping stakes
/// @author Marlin
/// @notice Use this contract only for testing
/// @dev Contract may or may not change in future (depending upon the new slots in proxy-store)
contract RewardDelegatorsProxy {
    bytes32 internal constant IMPLEMENTATION_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.implementation")) - 1
    );
    bytes32 internal constant PROXY_ADMIN_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.admin")) - 1
    );

    constructor(address contractLogic, address proxyAdmin) public {
        // save the code address
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, contractLogic)
        }
        // save the proxy admin
        slot = PROXY_ADMIN_SLOT;
        address sender = proxyAdmin;
        assembly {
            sstore(slot, sender)
        }
    }

    function updateAdmin(address _newAdmin) public {
        require(
            msg.sender == getAdmin(),
            "Only the current admin should be able to new admin"
        );
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            sstore(slot, _newAdmin)
        }
    }

    /// @author Marlin
    /// @dev Only admin can update the contract
    /// @param _newLogic address is the address of the contract that has to updated to
    function updateLogic(address _newLogic) public {
        require(
            msg.sender == getAdmin(),
            "Only Admin should be able to update the contracts"
        );
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, _newLogic)
        }
    }

    /// @author Marlin
    /// @dev use assembly as contract store slot is manually decided
    function getAdmin() internal view returns (address result) {
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            result := sload(slot)
        }
    }

    /// @author Marlin
    /// @dev add functionality to forward the balance as well.
    function() external payable {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            let contractLogic := sload(slot)
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)

            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

pragma solidity >=0.4.24 <0.7.0;


/**
 * @title Initializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 */
contract Initializable {

  /**
   * @dev Indicates that the contract has been initialized.
   */
  bool private initialized;

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

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");

    bool isTopLevelCall = !initializing;
    if (isTopLevelCall) {
      initializing = true;
      initialized = true;
    }

    _;

    if (isTopLevelCall) {
      initializing = false;
    }
  }

  /// @dev Returns true if and only if the function is running in the constructor
  function isConstructor() private view returns (bool) {
    // extcodesize checks the size of the code stored in an address, and
    // address returns the current address. Since the code is still not
    // deployed when running a constructor, any checks on its code size will
    // yield zero, making it an effective way to detect if a contract is
    // under construction or not.
    address self = address(this);
    uint256 cs;
    assembly { cs := extcodesize(self) }
    return cs == 0;
  }

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}




            
pragma solidity ^0.5.0;

/*
 * @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 GSN 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.
 */
contract Context is Initializable {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}




            
pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}




            
pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}




            
pragma solidity 0.5.17;
pragma experimental ABIEncoderV2;


contract MPondLogic is Initializable {
    /// @notice EIP-20 token name for this token
    string public name;

    /// @notice EIP-20 token symbol for this token
    string public symbol;

    /// @notice EIP-20 token decimals for this token
    uint8 public decimals;

    /// @notice Total number of tokens in circulation
    uint256 public totalSupply; // 10k MPond
    uint256 public bridgeSupply; // 3k MPond

    address public dropBridge;
    /// @notice Allowance amounts on behalf of others
    mapping(address => mapping(address => uint96)) internal allowances;

    /// @notice Official record of token balances for each account
    mapping(address => uint96) internal balances;

    /// @notice A record of each accounts delegate
    mapping(address => mapping(address => uint96)) public delegates;

    /// @notice A checkpoint for marking number of votes from a given block
    struct Checkpoint {
        uint32 fromBlock;
        uint96 votes;
    }

    /// @notice A record of votes checkpoints for each account, by index
    mapping(address => mapping(uint32 => Checkpoint)) public checkpoints;

    /// @notice The number of checkpoints for each account
    mapping(address => uint32) public numCheckpoints;

    /// @notice The EIP-712 typehash for the contract's domain
    bytes32 public DOMAIN_TYPEHASH;

    /// @notice The EIP-712 typehash for the delegation struct used by the contract
    bytes32 public DELEGATION_TYPEHASH;

    /// @notice The EIP-712 typehash for the delegation struct used by the contract
    bytes32 public UNDELEGATION_TYPEHASH;

    /// @notice A record of states for signing / validating signatures
    mapping(address => uint256) public nonces;

    /// customized params
    address public admin;
    mapping(address => bool) public isWhiteListed;
    bool public enableAllTranfers;

    /// @notice An event thats emitted when an account changes its delegate
    event DelegateChanged(
        address indexed delegator,
        address indexed fromDelegate,
        address indexed toDelegate
    );

    /// @notice An event thats emitted when a delegate account's vote balance changes
    event DelegateVotesChanged(
        address indexed delegate,
        uint256 previousBalance,
        uint256 newBalance
    );

    /// @notice The standard EIP-20 transfer event
    event Transfer(address indexed from, address indexed to, uint256 amount);

    /// @notice The standard EIP-20 approval event
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 amount
    );

    /**
     * @notice Initializer a new MPond token
     * @param account The initial account to grant all the tokens
     */
    function initialize(
        address account,
        address bridge,
        address dropBridgeAddress
    ) public initializer {
        createConstants();
        require(
            account != bridge,
            "Bridge and account should not be the same address"
        );
        balances[bridge] = uint96(bridgeSupply);
        delegates[bridge][address(0)] = uint96(bridgeSupply);
        isWhiteListed[bridge] = true;
        emit Transfer(address(0), bridge, bridgeSupply);

        uint96 remainingSupply = sub96(
            uint96(totalSupply),
            uint96(bridgeSupply),
            "MPond: Subtraction overflow in the constructor"
        );
        balances[account] = remainingSupply;
        delegates[account][address(0)] = remainingSupply;
        isWhiteListed[account] = true;
        dropBridge = dropBridgeAddress;
        emit Transfer(address(0), account, uint256(remainingSupply));
    }

    function createConstants() internal {
        name = "Marlin";
        symbol = "MPond";
        decimals = 18;
        totalSupply = 10000e18;
        bridgeSupply = 7000e18;
        DOMAIN_TYPEHASH = keccak256(
            "EIP712Domain(string name,uint256 chainId,address verifyingContract)"
        );
        DELEGATION_TYPEHASH = keccak256(
            "Delegation(address delegatee,uint256 nonce,uint256 expiry,uint96 amount)"
        );
        UNDELEGATION_TYPEHASH = keccak256(
            "Unelegation(address delegatee,uint256 nonce,uint256 expiry,uint96 amount)"
        );
        admin = msg.sender;
        // enableAllTranfers = true; //This is only for testing, will be false
    }

    function addWhiteListAddress(address _address)
        external
        onlyAdmin("Only admin can whitelist")
        returns (bool)
    {
        isWhiteListed[_address] = true;
        return true;
    }

    function removeWhiteListAddress(address _address)
        external
        onlyAdmin("Only admin can remove from whitelist")
        returns (bool)
    {
        isWhiteListed[_address] = false;
        return true;
    }

    function enableAllTransfers()
        external
        onlyAdmin("Only admin can enable all transfers")
        returns (bool)
    {
        enableAllTranfers = true;
        return true;
    }

    function disableAllTransfers()
        external
        onlyAdmin("Only admin can disable all transfers")
        returns (bool)
    {
        enableAllTranfers = false;
        return true;
    }

    function changeDropBridge(address _updatedBridge)
        public
        onlyAdmin("Only admin can change drop bridge")
    {
        dropBridge = _updatedBridge;
    }

    function isWhiteListedTransfer(address _address1, address _address2)
        public
        view
        returns (bool)
    {
        if (
            enableAllTranfers ||
            isWhiteListed[_address1] ||
            isWhiteListed[_address2]
        ) {
            return true;
        } else if (_address1 == dropBridge) {
            return true;
        }
        return false;
    }

    /**
     * @notice Get the number of tokens `spender` is approved to spend on behalf of `account`
     * @param account The address of the account holding the funds
     * @param spender The address of the account spending the funds
     * @return The number of tokens approved
     */
    function allowance(address account, address spender)
        external
        view
        returns (uint256)
    {
        return allowances[account][spender];
    }

    /**
     * @notice Approve `spender` to transfer up to `amount` from `src`
     * @dev This will overwrite the approval amount for `spender`
     *  and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
     * @param spender The address of the account which may transfer tokens
     * @param rawAmount The number of tokens that are approved (2^256-1 means infinite)
     * @return Whether or not the approval succeeded
     */
    function approve(address spender, uint256 rawAmount)
        external
        returns (bool)
    {
        uint96 amount;
        if (rawAmount == uint256(-1)) {
            amount = uint96(-1);
        } else {
            amount = safe96(
                rawAmount,
                "MPond::approve: amount exceeds 96 bits"
            );
        }

        allowances[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function increaseAllowance(address spender, uint256 addedAmount)
        external
        returns (bool)
    {
        uint96 amount;
        if (addedAmount == uint256(-1)) {
            amount = uint96(-1);
        } else {
            amount = safe96(
                addedAmount,
                "MPond::approve: addedAmount exceeds 96 bits"
            );
        }

        allowances[msg.sender][spender] = add96(
            allowances[msg.sender][spender],
            amount,
            "MPond: increaseAllowance allowance value overflows"
        );
        emit Approval(msg.sender, spender, allowances[msg.sender][spender]);
        return true;
    }

    function decreaseAllowance(address spender, uint256 removedAmount)
        external
        returns (bool)
    {
        uint96 amount;
        if (removedAmount == uint256(-1)) {
            amount = uint96(-1);
        } else {
            amount = safe96(
                removedAmount,
                "MPond::approve: removedAmount exceeds 96 bits"
            );
        }

        allowances[msg.sender][spender] = sub96(
            allowances[msg.sender][spender],
            amount,
            "MPond: decreaseAllowance allowance value underflows"
        );
        emit Approval(msg.sender, spender, allowances[msg.sender][spender]);
        return true;
    }

    /**
     * @notice Get the number of tokens held by the `account`
     * @param account The address of the account to get the balance of
     * @return The number of tokens held
     */
    function balanceOf(address account) external view returns (uint256) {
        return balances[account];
    }

    /**
     * @notice Transfer `amount` tokens from `msg.sender` to `dst`
     * @param dst The address of the destination account
     * @param rawAmount The number of tokens to transfer
     * @return Whether or not the transfer succeeded
     */
    function transfer(address dst, uint256 rawAmount) external returns (bool) {
        require(
            isWhiteListedTransfer(msg.sender, dst),
            "Atleast one of the address (src or dst) should be whitelisted or all transfers must be enabled via enableAllTransfers()"
        );
        uint96 amount = safe96(
            rawAmount,
            "MPond::transfer: amount exceeds 96 bits"
        );
        _transferTokens(msg.sender, dst, amount);
        return true;
    }

    /**
     * @notice Transfer `amount` tokens from `src` to `dst`
     * @param src The address of the source account
     * @param dst The address of the destination account
     * @param rawAmount The number of tokens to transfer
     * @return Whether or not the transfer succeeded
     */
    function transferFrom(
        address src,
        address dst,
        uint256 rawAmount
    ) external returns (bool) {
        require(
            isWhiteListedTransfer(src, dst),
            "Atleast one of the address (src or dst) should be whitelisted or all transfers must be enabled via enableAllTransfers()"
        );
        address spender = msg.sender;
        uint96 spenderAllowance = allowances[src][spender];
        uint96 amount = safe96(
            rawAmount,
            "MPond::approve: amount exceeds 96 bits"
        );

        if (spender != src && spenderAllowance != uint96(-1)) {
            uint96 newAllowance = sub96(
                spenderAllowance,
                amount,
                "MPond::transferFrom: transfer amount exceeds spender allowance"
            );
            allowances[src][spender] = newAllowance;

            emit Approval(src, spender, newAllowance);
        }

        _transferTokens(src, dst, amount);
        return true;
    }

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegatee The address to delegate votes to
     */
    function delegate(address delegatee, uint96 amount) public {
        return _delegate(msg.sender, delegatee, amount);
    }

    function undelegate(address delegatee, uint96 amount) public {
        return _undelegate(msg.sender, delegatee, amount);
    }

    /**
     * @notice Delegates votes from signatory to `delegatee`
     * @param delegatee The address to delegate votes to
     * @param nonce The contract state required to match the signature
     * @param expiry The time at which to expire the signature
     * @param v The recovery byte of the signature
     * @param r Half of the ECDSA signature pair
     * @param s Half of the ECDSA signature pair
     */
    function delegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s,
        uint96 amount
    ) public {
        bytes32 domainSeparator = keccak256(
            abi.encode(
                DOMAIN_TYPEHASH,
                keccak256(bytes(name)),
                getChainId(),
                address(this)
            )
        );
        bytes32 structHash = keccak256(
            abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry, amount)
        );
        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, structHash)
        );
        address signatory = ecrecover(digest, v, r, s);
        require(
            signatory != address(0),
            "MPond::delegateBySig: invalid signature"
        );
        require(
            nonce == nonces[signatory]++,
            "MPond::delegateBySig: invalid nonce"
        );
        require(now <= expiry, "MPond::delegateBySig: signature expired");
        return _delegate(signatory, delegatee, amount);
    }

    function undelegateBySig(
        address delegatee,
        uint256 nonce,
        uint256 expiry,
        uint8 v,
        bytes32 r,
        bytes32 s,
        uint96 amount
    ) public {
        bytes32 domainSeparator = keccak256(
            abi.encode(
                DOMAIN_TYPEHASH,
                keccak256(bytes(name)),
                getChainId(),
                address(this)
            )
        );
        bytes32 structHash = keccak256(
            abi.encode(UNDELEGATION_TYPEHASH, delegatee, nonce, expiry, amount)
        );
        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainSeparator, structHash)
        );
        address signatory = ecrecover(digest, v, r, s);
        require(
            signatory != address(0),
            "MPond::undelegateBySig: invalid signature"
        );
        require(
            nonce == nonces[signatory]++,
            "MPond::undelegateBySig: invalid nonce"
        );
        require(now <= expiry, "MPond::undelegateBySig: signature expired");
        return _undelegate(signatory, delegatee, amount);
    }

    /**
     * @notice Gets the current votes balance for `account`
     * @param account The address to get votes balance
     * @return The number of current votes for `account`
     */
    function getCurrentVotes(address account) external view returns (uint96) {
        uint32 nCheckpoints = numCheckpoints[account];
        return
            nCheckpoints != 0
                ? checkpoints[account][nCheckpoints - 1].votes
                : 0;
    }

    /**
     * @notice Determine the prior number of votes for an account as of a block number
     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
     * @param account The address of the account to check
     * @param blockNumber The block number to get the vote balance at
     * @return The number of votes the account had as of the given block
     */
    function getPriorVotes(address account, uint256 blockNumber)
        public
        view
        returns (uint96)
    {
        require(
            blockNumber < block.number,
            "MPond::getPriorVotes: not yet determined"
        );

        uint32 nCheckpoints = numCheckpoints[account];
        if (nCheckpoints == 0) {
            return 0;
        }

        // First check most recent balance
        if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
            return checkpoints[account][nCheckpoints - 1].votes;
        }

        // Next check implicit zero balance
        if (checkpoints[account][0].fromBlock > blockNumber) {
            return 0;
        }

        uint32 lower = 0;
        uint32 upper = nCheckpoints - 1;
        while (upper > lower) {
            uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
            Checkpoint memory cp = checkpoints[account][center];
            if (cp.fromBlock == blockNumber) {
                return cp.votes;
            } else if (cp.fromBlock < blockNumber) {
                lower = center;
            } else {
                upper = center - 1;
            }
        }
        return checkpoints[account][lower].votes;
    }

    function _delegate(
        address delegator,
        address delegatee,
        uint96 amount
    ) internal {
        delegates[delegator][address(0)] = sub96(
            delegates[delegator][address(0)],
            amount,
            "MPond: delegates underflow"
        );
        delegates[delegator][delegatee] = add96(
            delegates[delegator][delegatee],
            amount,
            "MPond: delegates overflow"
        );

        emit DelegateChanged(delegator, address(0), delegatee);

        _moveDelegates(address(0), delegatee, amount);
    }

    function _undelegate(
        address delegator,
        address delegatee,
        uint96 amount
    ) internal {
        delegates[delegator][delegatee] = sub96(
            delegates[delegator][delegatee],
            amount,
            "MPond: undelegates underflow"
        );
        delegates[delegator][address(0)] = add96(
            delegates[delegator][address(0)],
            amount,
            "MPond: delegates underflow"
        );
        emit DelegateChanged(delegator, delegatee, address(0));
        _moveDelegates(delegatee, address(0), amount);
    }

    function _transferTokens(
        address src,
        address dst,
        uint96 amount
    ) internal {
        require(
            src != address(0),
            "MPond::_transferTokens: cannot transfer from the zero address"
        );
        require(
            delegates[src][address(0)] >= amount,
            "MPond: _transferTokens: undelegated amount should be greater than transfer amount"
        );
        require(
            dst != address(0),
            "MPond::_transferTokens: cannot transfer to the zero address"
        );

        balances[src] = sub96(
            balances[src],
            amount,
            "MPond::_transferTokens: transfer amount exceeds balance"
        );
        delegates[src][address(0)] = sub96(
            delegates[src][address(0)],
            amount,
            "MPond: _tranferTokens: undelegate subtraction error"
        );

        balances[dst] = add96(
            balances[dst],
            amount,
            "MPond::_transferTokens: transfer amount overflows"
        );
        delegates[dst][address(0)] = add96(
            delegates[dst][address(0)],
            amount,
            "MPond: _transferTokens: undelegate addition error"
        );
        emit Transfer(src, dst, amount);

        // _moveDelegates(delegates[src], delegates[dst], amount);
    }

    function _moveDelegates(
        address srcRep,
        address dstRep,
        uint96 amount
    ) internal {
        if (srcRep != dstRep && amount != 0) {
            if (srcRep != address(0)) {
                uint32 srcRepNum = numCheckpoints[srcRep];
                uint96 srcRepOld = srcRepNum != 0
                    ? checkpoints[srcRep][srcRepNum - 1].votes
                    : 0;
                uint96 srcRepNew = sub96(
                    srcRepOld,
                    amount,
                    "MPond::_moveVotes: vote amount underflows"
                );
                _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
            }

            if (dstRep != address(0)) {
                uint32 dstRepNum = numCheckpoints[dstRep];
                uint96 dstRepOld = dstRepNum != 0
                    ? checkpoints[dstRep][dstRepNum - 1].votes
                    : 0;
                uint96 dstRepNew = add96(
                    dstRepOld,
                    amount,
                    "MPond::_moveVotes: vote amount overflows"
                );
                _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
            }
        }
    }

    function _writeCheckpoint(
        address delegatee,
        uint32 nCheckpoints,
        uint96 oldVotes,
        uint96 newVotes
    ) internal {
        uint32 blockNumber = safe32(
            block.number,
            "MPond::_writeCheckpoint: block number exceeds 32 bits"
        );

        if (
            nCheckpoints != 0 &&
            checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber
        ) {
            checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
        } else {
            checkpoints[delegatee][nCheckpoints] = Checkpoint(
                blockNumber,
                newVotes
            );
            numCheckpoints[delegatee] = nCheckpoints + 1;
        }

        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
    }

    function safe32(uint256 n, string memory errorMessage)
        internal
        pure
        returns (uint32)
    {
        require(n < 2**32, errorMessage);
        return uint32(n);
    }

    function safe96(uint256 n, string memory errorMessage)
        internal
        pure
        returns (uint96)
    {
        require(n < 2**96, errorMessage);
        return uint96(n);
    }

    function add96(
        uint96 a,
        uint96 b,
        string memory errorMessage
    ) internal pure returns (uint96) {
        uint96 c = a + b;
        require(c >= a, errorMessage);
        return c;
    }

    function sub96(
        uint96 a,
        uint96 b,
        string memory errorMessage
    ) internal pure returns (uint96) {
        require(b <= a, errorMessage);
        return a - b;
    }

    function getChainId() internal pure returns (uint256) {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        return chainId;
    }

    modifier onlyAdmin(string memory _error) {
        require(msg.sender == admin, _error);
        _;
    }
}




            
pragma solidity ^0.5.17;

interface IRewardDelegators {
    // there's no undelegationWaitTime in rewardDelegators contract
    function undelegationWaitTime() external returns(uint256);
    function minMPONDStake() external returns(uint256);
    function MPONDTokenId() external returns(bytes32);
    function updateMPONDTokenId(bytes32 _updatedMPONDTokenId) external;
    function addRewardFactor(bytes32 _tokenId, uint256 _rewardFactor) external;
    function removeRewardFactor(bytes32 _tokenId) external;
    function updateRewardFactor(bytes32 _tokenId, uint256 _updatedRewardFactor) external;
    function _updateRewards(address _cluster) external;
    function delegate(
        address _delegator,
        address _cluster,
        bytes32[] calldata _tokens,
        uint256[] calldata _amounts
    ) external;
    function undelegate(
        address _delegator,
        address _cluster,
        bytes32[] calldata _tokens,
        uint256[] calldata _amounts
    ) external;
    function withdrawRewards(address _delegator, address _cluster) external returns(uint256);
    function isClusterActive(address _cluster) external returns(bool);
    function getClusterDelegation(address _cluster, bytes32 _tokenId) external view returns(uint256);
    function getDelegation(address _cluster, address _delegator, bytes32 _tokenId) external view returns(uint256);
    function updateUndelegationWaitTime(uint256 _undelegationWaitTime) external;
    function updateMinMPONDStake(uint256 _minMPONDStake) external;
    function updateStakeAddress(address _updatedStakeAddress) external;
    function updateClusterRewards(address _updatedClusterRewards) external;
    function updateClusterRegistry(address _updatedClusterRegistry) external;
    function updatePONDAddress(address _updatedPOND) external;
    function getFullTokenList() external view returns (bytes32[] memory);
    function getAccRewardPerShare(address _cluster, bytes32 _tokenId) external view returns(uint256);
}



            
pragma solidity ^0.5.0;

/**
 * @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.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be aplied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Initializable, Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function initialize(address sender) public initializer {
        _owner = sender;
        emit OwnershipTransferred(address(0), _owner);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _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 onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    uint256[50] private ______gap;
}




            
pragma solidity ^0.5.0;

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Initializable, Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }

    uint256[50] private ______gap;
}


pragma solidity >=0.4.21 <0.7.0;



contract StakeManager is Initializable, Ownable {

    using SafeMath for uint256;

    struct Stash {
        address staker;
        address delegatedCluster;
        mapping(bytes32 => uint256) amount;   // name is not intuitive
        uint256 undelegatesAt;
    }

    struct Token {
        address addr;
        bool isActive;
    }
    // stashId to stash
    // stashId = keccak256(index)
    mapping(bytes32 => Stash) public stashes;
    // Stash index for unique id generation
    uint256 public stashIndex;
    // tokenId to token address - tokenId = keccak256(tokenTicker)
    mapping(bytes32 => Token) tokenAddresses;
    MPondLogic MPOND;
    MPondLogic prevMPOND;
    address _unused_1;
    IRewardDelegators public rewardDelegators;
    // new variables
    struct Lock {
        uint256 unlockBlock;
        uint256 iValue;
    }

    mapping(bytes32 => Lock) public locks;
    mapping(bytes32 => uint256) public lockWaitTime;
    bytes32 constant REDELEGATION_LOCK_SELECTOR = keccak256("REDELEGATION_LOCK");
    uint256 public undelegationWaitTime;

    event StashCreated(
        address indexed creator,
        bytes32 stashId,
        uint256 stashIndex,
        bytes32[] tokens,
        uint256[] amounts
    );
    event StashDelegated(bytes32 stashId, address delegatedCluster);
    event StashUndelegated(bytes32 stashId, address undelegatedCluster, uint256 undelegatesAt);
    event StashWithdrawn(bytes32 stashId, bytes32[] tokens, uint256[] amounts);
    event StashClosed(bytes32 stashId, address indexed staker);
    event AddedToStash(bytes32 stashId, address delegatedCluster, bytes32[] tokens, uint256[] amounts);
    event TokenAdded(bytes32 tokenId, address tokenAddress);
    event TokenRemoved(bytes32 tokenId);
    event TokenUpdated(bytes32 tokenId, address tokenAddress);
    event RedelegationRequested(bytes32 stashId, address currentCluster, address updatedCluster, uint256 redelegatesAt);
    event Redelegated(bytes32 stashId, address updatedCluster);
    event LockTimeUpdated(bytes32 selector, uint256 prevLockTime, uint256 updatedLockTime);
    event StashSplit(
        bytes32 _newStashId,
        bytes32 _stashId,
        uint256 _stashIndex,
        bytes32[] _splitTokens,
        uint256[] _splitAmounts
    );
    event StashesMerged(bytes32 _stashId1, bytes32 _stashId2);
    event StashUndelegationCancelled(bytes32 _stashId);
    event UndelegationWaitTimeUpdated(uint256 undelegationWaitTime);
    event RedelegationCancelled(bytes32 indexed _stashId);

    function initialize(
        bytes32[] memory _tokenIds,
        address[] memory _tokenAddresses,
        address _MPONDTokenAddress,
        address _rewardDelegatorsAddress,
        address _owner,
        uint256 _undelegationWaitTime)
        initializer
        public
    {
        require(
            _tokenIds.length == _tokenAddresses.length
        );
        for(uint256 i=0; i < _tokenIds.length; i++) {
            tokenAddresses[_tokenIds[i]] = Token(_tokenAddresses[i], true);
            emit TokenAdded(_tokenIds[i], _tokenAddresses[i]);
        }
        MPOND = MPondLogic(_MPONDTokenAddress);
        rewardDelegators = IRewardDelegators(_rewardDelegatorsAddress);
        undelegationWaitTime = _undelegationWaitTime;
        super.initialize(_owner);
    }

    function updateLockWaitTime(bytes32 _selector, uint256 _updatedWaitTime) external onlyOwner {
        emit LockTimeUpdated(_selector, lockWaitTime[_selector], _updatedWaitTime);
        lockWaitTime[_selector] = _updatedWaitTime;
    }

    function changeMPONDTokenAddress(
        address _MPONDTokenAddress
    ) external onlyOwner {
        prevMPOND = MPOND;
        MPOND = MPondLogic(_MPONDTokenAddress);
        emit TokenUpdated(keccak256("MPOND"), _MPONDTokenAddress);
    }

    function updateRewardDelegators(
        address _updatedRewardDelegator
    ) external onlyOwner {
        require(
            _updatedRewardDelegator != address(0)
        );
        rewardDelegators = IRewardDelegators(_updatedRewardDelegator);
    }

    function updateUndelegationWaitTime(
        uint256 _undelegationWaitTime
    ) external onlyOwner {
        undelegationWaitTime = _undelegationWaitTime;
        emit UndelegationWaitTimeUpdated(_undelegationWaitTime);
    }

    function enableToken(
        bytes32 _tokenId,
        address _address
    ) external onlyOwner {
        require(
            !tokenAddresses[_tokenId].isActive
        );
        require(_address != address(0));
        tokenAddresses[_tokenId] = Token(_address, true);
        emit TokenAdded(_tokenId, _address);
    }

    function disableToken(
        bytes32 _tokenId
    ) external onlyOwner {
        require(
            tokenAddresses[_tokenId].isActive
        );
        tokenAddresses[_tokenId].isActive = false;
        emit TokenRemoved(_tokenId);
    }

    function createStashAndDelegate(
        bytes32[] memory _tokens,
        uint256[] memory _amounts,
        address _delegatedCluster
    ) public {
        bytes32 stashId = createStash(_tokens, _amounts);
        delegateStash(stashId, _delegatedCluster);
    }

    function createStash(
        bytes32[] memory _tokens,
        uint256[] memory _amounts
    ) public returns(bytes32) {
        require(
            _tokens.length == _amounts.length,
            "CS1"
        );
        require(
            _tokens.length != 0,
            "CS2"
        );
        uint256 _stashIndex = stashIndex;
        bytes32 _stashId = keccak256(abi.encodePacked(_stashIndex));
        for(uint256 _index=0; _index < _tokens.length; _index++) {
            bytes32 _tokenId = _tokens[_index];
            uint256 _amount = _amounts[_index];
            require(
                tokenAddresses[_tokenId].isActive,
                "CS3"
            );
            require(
                stashes[_stashId].amount[_tokenId] == 0,
                "CS4"
            );
            require(
                _amount != 0,
                "CS5"
            );
            stashes[_stashId].amount[_tokenId] = _amount;
            _lockTokens(_tokenId, _amount, msg.sender);
        }
        stashes[_stashId].staker = msg.sender;
        emit StashCreated(msg.sender, _stashId, _stashIndex, _tokens, _amounts);
        stashIndex = _stashIndex + 1;  // Can't overflow
        return _stashId;
    }

    function addToStash(
        bytes32 _stashId,
        bytes32[] calldata _tokens,
        uint256[] calldata _amounts
    ) external {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "AS1"
        );
        require(
            _stash.undelegatesAt <= block.number,
            "AS2"
        );
        require(
            _tokens.length == _amounts.length,
            "AS3"
        );
        if(
            _stash.delegatedCluster != address(0)
        ) {
            rewardDelegators.delegate(msg.sender, _stash.delegatedCluster, _tokens, _amounts);
        }
        for(uint256 i = 0; i < _tokens.length; i++) {
            bytes32 _tokenId = _tokens[i];
            require(
                tokenAddresses[_tokenId].isActive,
                "AS4"
            );
            if(_amounts[i] != 0) {
                stashes[_stashId].amount[_tokenId] = stashes[_stashId].amount[_tokenId].add(_amounts[i]);
                _lockTokens(_tokenId, _amounts[i], msg.sender);
            }
        }
        
        emit AddedToStash(_stashId, _stash.delegatedCluster, _tokens, _amounts);
    }

    function delegateStash(bytes32 _stashId, address _delegatedCluster) public {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "DS1"
        );
        require(
            _delegatedCluster != address(0),
            "DS2"
        );
        require(
            _stash.delegatedCluster == address(0),
            "DS3"
        );
        require(
            _stash.undelegatesAt <= block.number,
            "DS4"
        );
        stashes[_stashId].delegatedCluster = _delegatedCluster;
        delete stashes[_stashId].undelegatesAt;
        bytes32[] memory _tokens = rewardDelegators.getFullTokenList();
        uint256[] memory _amounts = new uint256[](_tokens.length);
        for(uint256 i = 0; i < _tokens.length; i++) {
            _amounts[i] = stashes[_stashId].amount[_tokens[i]];
        }
        rewardDelegators.delegate(msg.sender, _delegatedCluster, _tokens, _amounts);
        emit StashDelegated(_stashId, _delegatedCluster);
    }

    function requestStashRedelegation(bytes32 _stashId, address _newCluster) public {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "RSR1"
        );
        require(
            _stash.delegatedCluster != address(0),
            "RSR2"
        );
        require(
            _newCluster != address(0),
            "RSR3"
        );
        uint256 _redelegationBlock = _requestStashRedelegation(_stashId, _newCluster);
        emit RedelegationRequested(_stashId, _stash.delegatedCluster, _newCluster, _redelegationBlock);
    }

    function _requestStashRedelegation(bytes32 _stashId, address _newCluster) internal returns(uint256) {
        bytes32 _lockId = keccak256(abi.encodePacked(REDELEGATION_LOCK_SELECTOR, _stashId));
        uint256 _unlockBlock = locks[_lockId].unlockBlock;
        require(
            _unlockBlock == 0,
            "IRSR1"
        );
        uint256 _redelegationBlock = block.number.add(lockWaitTime[REDELEGATION_LOCK_SELECTOR]);
        locks[_lockId] = Lock(_redelegationBlock, uint256(_newCluster));
        return _redelegationBlock;
    }

    function requestStashRedelegations(bytes32[] memory _stashIds, address[] memory _newClusters) public {
        require(_stashIds.length == _newClusters.length, "SM:RSRs - Invalid input data");
        for(uint256 i=0; i < _stashIds.length; i++) {
            requestStashRedelegation(_stashIds[i], _newClusters[i]);
        }
    }

    function redelegateStash(bytes32 _stashId) public {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.delegatedCluster != address(0),
            "RS1"
        );
        bytes32 _lockId = keccak256(abi.encodePacked(REDELEGATION_LOCK_SELECTOR, _stashId));
        uint256 _unlockBlock = locks[_lockId].unlockBlock;
        require(
            _unlockBlock != 0 && _unlockBlock <= block.number,
            "RS2"
        );
        address _updatedCluster = address(locks[_lockId].iValue);
        _redelegateStash(_stashId, _stash.staker, _stash.delegatedCluster, _updatedCluster);
        delete locks[_lockId];
    }

    function _redelegateStash(
        bytes32 _stashId,
        address _staker,
        address _delegatedCluster,
        address _updatedCluster
    ) internal {
        bytes32[] memory _tokens = rewardDelegators.getFullTokenList();
        uint256[] memory _amounts = new uint256[](_tokens.length);
        for(uint256 i=0; i < _tokens.length; i++) {
            _amounts[i] = stashes[_stashId].amount[_tokens[i]];
        }
        if(_delegatedCluster != address(0)) {
            rewardDelegators.undelegate(_staker, _delegatedCluster, _tokens, _amounts);
        }
        rewardDelegators.delegate(_staker, _updatedCluster, _tokens, _amounts);
        stashes[_stashId].delegatedCluster = _updatedCluster;
        emit Redelegated(_stashId, _updatedCluster);
    }

    function splitStash(bytes32 _stashId, bytes32[] calldata _tokens, uint256[] calldata _amounts) external {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "SS1"
        );
        require(
            _tokens.length != 0,
            "SS2"
        );
        require(
            _tokens.length == _amounts.length,
            "SS3"
        );
        uint256 _stashIndex = stashIndex;
        bytes32 _newStashId = keccak256(abi.encodePacked(_stashIndex));
        for(uint256 _index=0; _index < _tokens.length; _index++) {
            bytes32 _tokenId = _tokens[_index];
            uint256 _amount = _amounts[_index];
            require(
                stashes[_newStashId].amount[_tokenId] == 0,
                "SS4"
            );
            require(
                _amount != 0,
                "SS5"
            );
            stashes[_stashId].amount[_tokenId] = stashes[_stashId].amount[_tokenId].sub(
                _amount,
                "SS6"
            );
            stashes[_newStashId].amount[_tokenId] = _amount;
        }
        stashes[_newStashId].staker = msg.sender;
        stashes[_newStashId].delegatedCluster = _stash.delegatedCluster;
        stashes[_newStashId].undelegatesAt = _stash.undelegatesAt;
        emit StashSplit(_newStashId, _stashId, _stashIndex, _tokens, _amounts);
        stashIndex = _stashIndex + 1;
    }

    function mergeStash(bytes32 _stashId1, bytes32 _stashId2) external {
        require(_stashId1 != _stashId2, "MS1");
        Stash memory _stash1 = stashes[_stashId1];
        Stash memory _stash2 = stashes[_stashId2];
        require(
            _stash1.staker == msg.sender && _stash2.staker == msg.sender,
            "MS2"
        );
        require(
            _stash1.delegatedCluster == _stash2.delegatedCluster,
            "MS3"
        );
        require(
            (_stash1.undelegatesAt <= block.number) &&
            (_stash2.undelegatesAt <= block.number),
            "MS4"
        );
        bytes32 _lockId1 = keccak256(abi.encodePacked(REDELEGATION_LOCK_SELECTOR, _stashId1));
        uint256 _unlockBlock1 = locks[_lockId1].unlockBlock;
        bytes32 _lockId2 = keccak256(abi.encodePacked(REDELEGATION_LOCK_SELECTOR, _stashId2));
        uint256 _unlockBlock2 = locks[_lockId2].unlockBlock;
        require(
            _unlockBlock1 == 0 && _unlockBlock2 == 0,
            "MS5"
        );
        bytes32[] memory _tokens = rewardDelegators.getFullTokenList();
        for(uint256 i=0; i < _tokens.length; i++) {
            uint256 _amount = stashes[_stashId2].amount[_tokens[i]];
            if(_amount == 0) {
                continue;
            }
            delete stashes[_stashId2].amount[_tokens[i]];
            stashes[_stashId1].amount[_tokens[i]] = stashes[_stashId1].amount[_tokens[i]].add(_amount);
        }
        delete stashes[_stashId2];
        emit StashesMerged(_stashId1, _stashId2);
    }

    function redelegateStashes(bytes32[] memory _stashIds) public {
        for(uint256 i=0; i < _stashIds.length; i++) {
            redelegateStash(_stashIds[i]);
        }
    }
    
    function cancelRedelegation(bytes32 _stashId) public {
        require(
            msg.sender == stashes[_stashId].staker,
            "CR1"
        );
        require(_cancelRedelegation(_stashId), "CR2");
    }

    function _cancelRedelegation(bytes32 _stashId) internal returns(bool) {
        bytes32 _lockId = keccak256(abi.encodePacked(REDELEGATION_LOCK_SELECTOR, _stashId));
        if(locks[_lockId].unlockBlock != 0) {
            delete locks[_lockId];
            emit RedelegationCancelled(_stashId);
            return true;
        }
        return false;
    }

    function undelegateStash(bytes32 _stashId) public {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "US1"
        );
        require(
            _stash.delegatedCluster != address(0),
            "US2"
        );
        uint256 _waitTime = undelegationWaitTime;
        uint256 _undelegationBlock = block.number.add(_waitTime);
        stashes[_stashId].undelegatesAt = _undelegationBlock;
        delete stashes[_stashId].delegatedCluster;
        _cancelRedelegation(_stashId);
        bytes32[] memory _tokens = rewardDelegators.getFullTokenList();
        uint256[] memory _amounts = new uint256[](_tokens.length);
        for(uint256 i=0; i < _tokens.length; i++) {
            _amounts[i] = stashes[_stashId].amount[_tokens[i]];
        }
        rewardDelegators.undelegate(msg.sender, _stash.delegatedCluster, _tokens, _amounts);
        emit StashUndelegated(_stashId, _stash.delegatedCluster, _undelegationBlock);
    }

    function undelegateStashes(bytes32[] memory _stashIds) public {
        for(uint256 i=0; i < _stashIds.length; i++) {
            undelegateStash(_stashIds[i]);
        }
    }
    
    function cancelUndelegation(bytes32 _stashId, address _delegatedCluster) public {
        address _staker = stashes[_stashId].staker;
        uint256 _undelegatesAt = stashes[_stashId].undelegatesAt;
        require(
            _staker == msg.sender,
            "CU1"
        );
        require(
            _undelegatesAt > block.number,
            "CU2"
        );
        require(
            _undelegatesAt < block.number
                            .add(undelegationWaitTime)
                            .sub(lockWaitTime[REDELEGATION_LOCK_SELECTOR]),
            "CU3"
        );
        delete stashes[_stashId].undelegatesAt;
        emit StashUndelegationCancelled(_stashId);
        _redelegateStash(_stashId, _staker, address(0), _delegatedCluster);
    }

    function withdrawStash(bytes32 _stashId) external {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "WS1"
        );
        require(
            _stash.delegatedCluster == address(0),
            "WS2"
        );
        require(
            _stash.undelegatesAt <= block.number,
            "WS3"
        );
        bytes32[] memory _tokens = rewardDelegators.getFullTokenList();
        uint256[] memory _amounts = new uint256[](_tokens.length);
        for(uint256 i=0; i < _tokens.length; i++) {
            _amounts[i] = stashes[_stashId].amount[_tokens[i]];
            if(_amounts[i] == 0) continue;
            delete stashes[_stashId].amount[_tokens[i]];
            _unlockTokens(_tokens[i], _amounts[i], msg.sender);
        }
        // Other items already zeroed
        delete stashes[_stashId].staker;
        delete stashes[_stashId].undelegatesAt;
        emit StashWithdrawn(_stashId, _tokens, _amounts);
        emit StashClosed(_stashId, msg.sender);
    }

    function withdrawStash(
        bytes32 _stashId,
        bytes32[] calldata _tokens,
        uint256[] calldata _amounts
    ) external {
        Stash memory _stash = stashes[_stashId];
        require(
            _stash.staker == msg.sender,
            "WSC1"
        );
        require(
            _stash.delegatedCluster == address(0),
            "WSC2"
        );
        require(
            _stash.undelegatesAt <= block.number,
            "WSC3"
        );
        require(
            _tokens.length == _amounts.length,
            "WSC4"
        );
        for(uint256 i=0; i < _tokens.length; i++) {
            uint256 _balance = stashes[_stashId].amount[_tokens[i]];
            require(
                _balance >= _amounts[i],
                "WSC5"
            );
            if(_balance == _amounts[i]) {
                delete stashes[_stashId].amount[_tokens[i]];
            } else {
                stashes[_stashId].amount[_tokens[i]] = _balance.sub(_amounts[i]);
            }
            _unlockTokens(_tokens[i], _amounts[i], msg.sender);
        }
        emit StashWithdrawn(_stashId, _tokens, _amounts);
    }

    function _lockTokens(bytes32 _tokenId, uint256 _amount, address _delegator) internal {
        if(_amount == 0) {
            return;
        }
        address tokenAddress = tokenAddresses[_tokenId].addr;
        // pull tokens from mpond/pond contract
        // if mpond transfer the governance rights back
        require(
            ERC20(tokenAddress).transferFrom(
                _delegator,
                address(this),
                _amount
            ), "LT1"
        );
        if (tokenAddress == address(MPOND)) {
            // send a request to delegate governance rights for the amount to delegator
            MPOND.delegate(
                _delegator,
                uint96(_amount)
            );
        }
    }

    function _unlockTokens(bytes32 _tokenId, uint256 _amount, address _delegator) internal {
        if(_amount == 0) {
            return;
        }
        address tokenAddress = tokenAddresses[_tokenId].addr;
        if(tokenAddress == address(MPOND)) {
            // send a request to undelegate governacne rights for the amount to previous delegator
            MPOND.undelegate(
                _delegator,
                uint96(_amount)
            );
        } else if(tokenAddress == address(prevMPOND)) {
            prevMPOND.undelegate(
                _delegator,
                uint96(_amount)
            );
        }
        require(
            ERC20(tokenAddress).transfer(
                _delegator,
                _amount
            ), "UT1"
        );
    }

    function getTokenAmountInStash(bytes32 _stashId, bytes32 _tokenId) external view returns(uint256) {
        return stashes[_stashId].amount[_tokenId];
    }
}

/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity >=0.4.24 <0.7.0;


/**
 * @title Initializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 */
contract Initializable {

  /**
   * @dev Indicates that the contract has been initialized.
   */
  bool private initialized;

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

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");

    bool isTopLevelCall = !initializing;
    if (isTopLevelCall) {
      initializing = true;
      initialized = true;
    }

    _;

    if (isTopLevelCall) {
      initializing = false;
    }
  }

  /// @dev Returns true if and only if the function is running in the constructor
  function isConstructor() private view returns (bool) {
    // extcodesize checks the size of the code stored in an address, and
    // address returns the current address. Since the code is still not
    // deployed when running a constructor, any checks on its code size will
    // yield zero, making it an effective way to detect if a contract is
    // under construction or not.
    address self = address(this);
    uint256 cs;
    assembly { cs := extcodesize(self) }
    return cs == 0;
  }

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.0;


/*
 * @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 GSN 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.
 */
contract Context is Initializable {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.17;
interface IClusterRegistry {
    function locks(bytes32 _lockId) external returns(uint256, uint256);
    function lockWaitTime(bytes32 _selectorId) external returns(uint256);
    function updateLockWaitTime(bytes32 _selector, uint256 _updatedWaitTime) external;
    function register(
        bytes32 _networkId, 
        uint256 _commission, 
        address _rewardAddress, 
        address _clientKey
    ) external returns(bool);
    function updateCluster(
        uint256 _commission, 
        bytes32 _networkId, 
        address _rewardAddress, 
        address _clientKey
    ) external;
    function updateCommission(uint256 _commission) external;
    function switchNetwork(bytes32 _networkId) external;
    function updateRewardAddress(address _rewardAddress) external;
    function updateClientKey(address _clientKey) external;
    function unregister() external;
    function isClusterValid(address _cluster) external returns(bool);
    function getCommission(address _cluster) external returns(uint256);
    function getNetwork(address _cluster) external returns(bytes32);
    function getRewardAddress(address _cluster) external view returns(address);
    function getClientKey(address _cluster) external view returns(address);
    function getCluster(address _cluster) external;
    function getRewardInfo(address _cluster) external returns(uint256, address);
}



/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.17;

interface IClusterRewards {
    function clusterRewards(address _cluster) external returns(uint256);
    function rewardWeight(bytes32 _networkId) external returns(uint256);
    function totalRewardsPerEpoch() external returns(uint256);
    function feeder() external returns(address);
    function rewardDistributionWaitTime() external returns(uint256);
    function changeFeeder(address _newFeeder) external;
    function addNetwork(bytes32 _networkId, uint256 _rewardWeight) external;
    function removeNetwork(bytes32 _networkId) external;
    function changeNetworkReward(bytes32 _networkId, uint256 _updatedRewardWeight) external;
    function feed(bytes32 _networkId, address[] calldata _clusters, uint256[] calldata _payouts, uint256 _epoch) external;
    function getRewardPerEpoch(bytes32 _networkId) external view returns(uint256);
    function claimReward(address _cluster) external returns(uint256);
    function updateRewardDelegatorAddress(address _updatedRewardDelegator) external;
    function updatePONDAddress(address _updatedPOND) external;
    function changeRewardPerEpoch(uint256 _updatedRewardPerEpoch) external;
    function changePayoutDenomination(uint256 _updatedPayoutDenomination) external;
    function updateRewardDistributionWaitTime(uint256 _updatedRewardDistributionWaitTime) external;
}



/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.0;


////import "../../GSN/Context.sol";
////import "./IERC20.sol";
////import "../../math/SafeMath.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Initializable, Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }

    uint256[50] private ______gap;
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/
            
pragma solidity ^0.5.0;


////import "../GSN/Context.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.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be aplied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Initializable, Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function initialize(address sender) public initializer {
        _owner = sender;
        emit OwnershipTransferred(address(0), _owner);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _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 onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    uint256[50] private ______gap;
}


/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/RewardDelegators.sol
*/

pragma solidity >=0.4.21 <0.7.0;


contract RewardDelegators is Initializable, Ownable {

    using SafeMath for uint256;

    struct Cluster {
        mapping(bytes32 => uint256) totalDelegations;
        mapping(address => mapping(bytes32 => uint256)) delegators;
        mapping(address => mapping(bytes32 => uint256)) rewardDebt;
        mapping(bytes32 => uint256) accRewardPerShare;
    }

    mapping(address => Cluster) clusters;

    uint256 __unused_2;
    address stakeAddress;
    uint256 public minMPONDStake;
    bytes32 public MPONDTokenId;
    mapping(bytes32 => uint256) rewardFactor;
    mapping(bytes32 => uint256) tokenIndex;
    mapping(bytes32 => bytes32) __unused_1;
    bytes32[] tokenList;
    IClusterRewards clusterRewards;
    IClusterRegistry clusterRegistry;
    ERC20 PONDToken;

    event AddReward(bytes32 tokenId, uint256 rewardFactor);
    event RemoveReward(bytes32 tokenId);
    event MPONDTokenIdUpdated(bytes32 MPONDTokenId);
    event RewardsUpdated(bytes32 tokenId, uint256 rewardFactor);
    event ClusterRewardDistributed(address cluster);
    event RewardsWithdrawn(address cluster, address delegator, bytes32[] tokenIds, uint256 rewards);
    event MinMPONDStakeUpdated(uint256 minMPONDStake);
    event StakeAddressUpdated(address _updatedStakeAddress);
    event ClusterRewardsAddressUpdated(address _updatedClusterRewards);
    event ClusterRegistryUpdated(address _updatedClusterRegistry);
    event PONDAddressUpdated(address _updatedPOND);

    modifier onlyStake() {
        require(msg.sender == stakeAddress, "RD:OS-only stake contract can invoke");
        _;
    }

    function initialize(
        address _stakeAddress,
        address _clusterRewardsAddress,
        address _clusterRegistry,
        address _rewardDelegatorsAdmin,
        uint256 _minMPONDStake,
        bytes32 _MPONDTokenId,
        address _PONDAddress,
        bytes32[] memory _tokenIds,
        uint256[] memory _rewardFactors
    ) public initializer {
        require(
            _tokenIds.length == _rewardFactors.length,
            "RD:I-Each TokenId should have a corresponding Reward Factor and vice versa"
        );
        stakeAddress = _stakeAddress;
        clusterRegistry = IClusterRegistry(_clusterRegistry);
        clusterRewards = IClusterRewards(_clusterRewardsAddress);
        PONDToken = ERC20(_PONDAddress);
        minMPONDStake = _minMPONDStake;
        emit MinMPONDStakeUpdated(_minMPONDStake);
        MPONDTokenId = _MPONDTokenId;
        emit MPONDTokenIdUpdated(_MPONDTokenId);
        for(uint256 i=0; i < _tokenIds.length; i++) {
            rewardFactor[_tokenIds[i]] = _rewardFactors[i];
            tokenIndex[_tokenIds[i]] = tokenList.length;
            tokenList.push(_tokenIds[i]);
            emit AddReward(_tokenIds[i], _rewardFactors[i]);
        }
        super.initialize(_rewardDelegatorsAdmin);
    }

    function updateMPONDTokenId(bytes32 _updatedMPONDTokenId) external onlyOwner {
        MPONDTokenId = _updatedMPONDTokenId;
        emit MPONDTokenIdUpdated(_updatedMPONDTokenId);
    }

    function addRewardFactor(bytes32 _tokenId, uint256 _rewardFactor) external onlyOwner {
        require(rewardFactor[_tokenId] == 0, "RD:AR-Reward already exists");
        require(_rewardFactor != 0, "RD:AR-Reward cant be 0");
        rewardFactor[_tokenId] = _rewardFactor;
        tokenIndex[_tokenId] = tokenList.length;
        tokenList.push(_tokenId);
        emit AddReward(_tokenId, _rewardFactor);
    }

    function removeRewardFactor(bytes32 _tokenId) external onlyOwner {
        require(rewardFactor[_tokenId] != 0, "RD:RR-Reward doesnt exist");
        bytes32 tokenToReplace = tokenList[tokenList.length - 1];
        uint256 originalTokenIndex = tokenIndex[_tokenId];
        tokenList[originalTokenIndex] = tokenToReplace;
        tokenIndex[tokenToReplace] = originalTokenIndex;
        tokenList.pop();
        delete rewardFactor[_tokenId];
        delete tokenIndex[_tokenId];
        emit RemoveReward(_tokenId);
    }

    function updateRewardFactor(bytes32 _tokenId, uint256 _updatedRewardFactor) external onlyOwner {
        require(rewardFactor[_tokenId] != 0, "RD:UR-Cant update reward that doesnt exist");
        require(_updatedRewardFactor != 0, "RD:UR-Reward cant be 0");
        rewardFactor[_tokenId] = _updatedRewardFactor;
        emit RewardsUpdated(_tokenId, _updatedRewardFactor);
    }

    function _updateRewards(address _cluster) public {
        uint256 reward = clusterRewards.claimReward(_cluster);
        if(reward == 0) {
            return;
        }

        (uint256 _commission, address _rewardAddress) = clusterRegistry.getRewardInfo(_cluster);

        uint256 commissionReward = reward.mul(_commission).div(100);
        uint256 delegatorReward = reward.sub(commissionReward);
        bytes32[] memory tokens = tokenList;
        uint256[] memory delegations = new uint256[](tokens.length);
        uint256 delegatedTokens = 0;
        for(uint i=0; i < tokens.length; i++) {
            delegations[i] = clusters[_cluster].totalDelegations[tokens[i]];
            if(delegations[i] != 0) {
                delegatedTokens++;
            }
        }
        for(uint i=0; i < tokens.length; i++) {
            // clusters[_cluster].accRewardPerShare[tokens[i]] = clusters[_cluster].accRewardPerShare[tokens[i]].add(
            //                                                         delegatorReward
            //                                                         .mul(rewardFactor[tokens[i]])
            //                                                         .mul(10**30)
            //                                                         .div(weightedStake)
            //                                                     );
            if(delegations[i] != 0) {
                clusters[_cluster].accRewardPerShare[tokens[i]] = clusters[_cluster].accRewardPerShare[tokens[i]].add(
                                                                    delegatorReward
                                                                    .mul(10**30)
                                                                    .div(delegatedTokens)
                                                                    .div(delegations[i])
                                                                );
            }
        }
        if(commissionReward != 0) {
            transferRewards(_rewardAddress, commissionReward);
        }
        emit ClusterRewardDistributed(_cluster);
    }

    function delegate(
        address _delegator,
        address _cluster,
        bytes32[] memory _tokens,
        uint256[] memory _amounts
    ) public onlyStake {
        _updateTokens(_delegator, _cluster, _tokens, _amounts, true);
    }

    function _updateTokens(
        address _delegator,
        address _cluster,
        bytes32[] memory _tokens,
        uint256[] memory _amounts,
        bool _isDelegation
    ) internal returns(uint256 _aggregateReward) {
        _updateRewards(_cluster);

        for(uint256 i = 0; i < _tokens.length; i++) {
            bytes32 _tokenId = _tokens[i];
            uint256 _amount = _amounts[i];

            (uint256 _oldBalance, uint256 _newBalance) = _updateBalances(
                _cluster,
                _delegator,
                _tokenId,
                _amount,
                _isDelegation
            );

            uint256 _reward = _updateDelegatorRewards(
                _cluster,
                _delegator,
                _tokenId,
                _oldBalance,
                _newBalance
            );

            _aggregateReward = _aggregateReward.add(_reward);
        }

        if(_aggregateReward != 0) {
            transferRewards(_delegator, _aggregateReward);
            emit RewardsWithdrawn(_cluster, _delegator, _tokens, _aggregateReward);
        }
    }

    function _updateBalances(
        address _cluster,
        address _delegator,
        bytes32 _tokenId,
        uint256 _amount,
        bool _isDelegation
    ) internal returns(uint256 _oldBalance, uint256 _newBalance) {
        _oldBalance = clusters[_cluster].delegators[_delegator][_tokenId];

        // short circuit
        if(_amount == 0) {
            _newBalance = _oldBalance;
            return (_oldBalance, _newBalance);
        }

        // update balances
        if(_isDelegation) {
            _newBalance =  _oldBalance.add(_amount);
            clusters[_cluster].totalDelegations[_tokenId] = clusters[_cluster].totalDelegations[_tokenId]
                                                            .add(_amount);
        } else {
            _newBalance =  _oldBalance.sub(_amount);
            clusters[_cluster].totalDelegations[_tokenId] = clusters[_cluster].totalDelegations[_tokenId]
                                                            .sub(_amount);
        }
        clusters[_cluster].delegators[_delegator][_tokenId] = _newBalance;
    }

    function _updateDelegatorRewards(
        address _cluster,
        address _delegator,
        bytes32 _tokenId,
        uint256 _oldBalance,
        uint256 _newBalance
    ) internal returns(uint256 _reward) {
        uint256 _accRewardPerShare = clusters[_cluster].accRewardPerShare[_tokenId];
        uint256 _rewardDebt = clusters[_cluster].rewardDebt[_delegator][_tokenId];

        // pending rewards
        uint256 _tokenPendingRewards =  _accRewardPerShare.mul(_oldBalance).div(10**30);

        // calculating pending rewards for the delegator if any
        _reward = _tokenPendingRewards.sub(_rewardDebt);

        // short circuit
        if(_oldBalance == _newBalance && _reward == 0) {
            return _reward;
        }

        // update the debt for next reward calculation
        clusters[_cluster].rewardDebt[_delegator][_tokenId] = _accRewardPerShare.mul(_newBalance).div(10**30);
    }

    function undelegate(
        address _delegator,
        address _cluster,
        bytes32[] memory _tokens,
        uint256[] memory _amounts
    ) public onlyStake {
        _updateTokens(_delegator, _cluster, _tokens, _amounts, false);
    }

    function withdrawRewards(address _delegator, address _cluster) public returns(uint256) {
        return _updateTokens(_delegator, _cluster, tokenList, new uint256[](tokenList.length), true);
    }

    function withdrawRewards(address _delegator, address[] calldata _clusters) external {
        for(uint256 i=0; i < _clusters.length; i++) {
            withdrawRewards(_delegator, _clusters[i]);
        }
    }

    function transferRewards(address _to, uint256 _amount) internal {
        PONDToken.transfer(_to, _amount);
    }

    function isClusterActive(address _cluster) external returns(bool) {
        if(
            clusterRegistry.isClusterValid(_cluster)
            && clusters[_cluster].totalDelegations[MPONDTokenId] > minMPONDStake
        ) {
            return true;
        }
        return false;
    }

    function getClusterDelegation(address _cluster, bytes32 _tokenId)
        external
        view
        returns(uint256)
    {
        return clusters[_cluster].totalDelegations[_tokenId];
    }

    function getDelegation(address _cluster, address _delegator, bytes32 _tokenId)
        external
        view
        returns(uint256)
    {
        return clusters[_cluster].delegators[_delegator][_tokenId];
    }

    function updateMinMPONDStake(uint256 _minMPONDStake) external onlyOwner {
        minMPONDStake = _minMPONDStake;
        emit MinMPONDStakeUpdated(_minMPONDStake);
    }

    function updateStakeAddress(address _updatedStakeAddress) external onlyOwner {
        require(
            _updatedStakeAddress != address(0),
            "RD:USA-Stake contract address cant be 0"
        );
        stakeAddress = _updatedStakeAddress;
        emit StakeAddressUpdated(_updatedStakeAddress);
    }

    function updateClusterRewards(
        address _updatedClusterRewards
    ) external onlyOwner {
        require(
            _updatedClusterRewards != address(0),
            "RD:UCR-ClusterRewards address cant be 0"
        );
        clusterRewards = IClusterRewards(_updatedClusterRewards);
        emit ClusterRewardsAddressUpdated(_updatedClusterRewards);
    }

    function updateClusterRegistry(
        address _updatedClusterRegistry
    ) external onlyOwner {
        require(
            _updatedClusterRegistry != address(0),
            "RD:UCR-Cluster Registry address cant be 0"
        );
        clusterRegistry = IClusterRegistry(_updatedClusterRegistry);
        emit ClusterRegistryUpdated(_updatedClusterRegistry);
    }

    function updatePONDAddress(address _updatedPOND) external onlyOwner {
        require(
            _updatedPOND != address(0),
            "RD:UPA-Updated POND token address cant be 0"
        );
        PONDToken = ERC20(_updatedPOND);
        emit PONDAddressUpdated(_updatedPOND);
    }

    function getFullTokenList() external view returns (bytes32[] memory) {
        return tokenList;
    }

    function getAccRewardPerShare(address _cluster, bytes32 _tokenId) external view returns(uint256) {
        return clusters[_cluster].accRewardPerShare[_tokenId];
    }
}

pragma solidity >=0.4.21 <0.7.0;


/// @title Contract to reward overlapping stakes
/// @author Marlin
/// @notice Use this contract only for testing
/// @dev Contract may or may not change in future (depending upon the new slots in proxy-store)
contract ClusterRewardsProxy {
    bytes32 internal constant IMPLEMENTATION_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.implementation")) - 1
    );
    bytes32 internal constant PROXY_ADMIN_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.admin")) - 1
    );

    constructor(address contractLogic, address proxyAdmin) public {
        // save the code address
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, contractLogic)
        }
        // save the proxy admin
        slot = PROXY_ADMIN_SLOT;
        address sender = proxyAdmin;
        assembly {
            sstore(slot, sender)
        }
    }

    function updateAdmin(address _newAdmin) public {
        require(
            msg.sender == getAdmin(),
            "Only the current admin should be able to new admin"
        );
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            sstore(slot, _newAdmin)
        }
    }

    /// @author Marlin
    /// @dev Only admin can update the contract
    /// @param _newLogic address is the address of the contract that has to updated to
    function updateLogic(address _newLogic) public {
        require(
            msg.sender == getAdmin(),
            "Only Admin should be able to update the contracts"
        );
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, _newLogic)
        }
    }

    /// @author Marlin
    /// @dev use assembly as contract store slot is manually decided
    function getAdmin() internal view returns (address result) {
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            result := sload(slot)
        }
    }

    /// @author Marlin
    /// @dev add functionality to forward the balance as well.
    function() external payable {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            let contractLogic := sload(slot)
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)

            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/
            
pragma solidity >=0.4.24 <0.7.0;


/**
 * @title Initializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 */
contract Initializable {

  /**
   * @dev Indicates that the contract has been initialized.
   */
  bool private initialized;

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

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");

    bool isTopLevelCall = !initializing;
    if (isTopLevelCall) {
      initializing = true;
      initialized = true;
    }

    _;

    if (isTopLevelCall) {
      initializing = false;
    }
  }

  /// @dev Returns true if and only if the function is running in the constructor
  function isConstructor() private view returns (bool) {
    // extcodesize checks the size of the code stored in an address, and
    // address returns the current address. Since the code is still not
    // deployed when running a constructor, any checks on its code size will
    // yield zero, making it an effective way to detect if a contract is
    // under construction or not.
    address self = address(this);
    uint256 cs;
    assembly { cs := extcodesize(self) }
    return cs == 0;
  }

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/
            
pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/
            
pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/
            
pragma solidity ^0.5.0;


/*
 * @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 GSN 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.
 */
contract Context is Initializable {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/
            
pragma solidity ^0.5.0;



/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Initializable, Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }

    uint256[50] private ______gap;
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/
            
pragma solidity ^0.5.0;


/**
 * @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.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be aplied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Initializable, Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function initialize(address sender) public initializer {
        _owner = sender;
        emit OwnershipTransferred(address(0), _owner);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _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 onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    uint256[50] private ______gap;
}


/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRewards.sol
*/

pragma solidity >=0.4.21 <0.7.0;


contract ClusterRewards is Initializable, Ownable {

    using SafeMath for uint256;

    mapping(address => uint256) public clusterRewards;

    mapping(bytes32 => uint256) public rewardWeight;
    uint256 totalWeight;
    uint256 public totalRewardsPerEpoch;
    uint256 payoutDenomination;

    address rewardDelegatorsAddress;
    ERC20 POND;
    address public feeder;
    mapping(uint256 => uint256) rewardDistributedPerEpoch;
    uint256 latestNewEpochRewardAt;
    uint256 public rewardDistributionWaitTime;

    event NetworkAdded(bytes32 networkId, uint256 rewardPerEpoch);
    event NetworkRemoved(bytes32 networkId);
    event NetworkRewardUpdated(bytes32 networkId, uint256 updatedRewardPerEpoch);
    event ClusterRewarded(bytes32 networkId);
    event FeederChanged(address _newFeeder);
    event RewardDelegatorAddressUpdated(address _updatedRewardDelegator);
    event PONDAddressUpdated(address _updatedPOND);
    event RewardPerEpochChanged(uint256 _updatedRewardPerEpoch);
    event PayoutDenominationChanged(uint256 _updatedPayoutDenomination);
    event RewardDistributionWaitTimeUpdated(uint256 _updatedRewardDistributionWaitTime);

    modifier onlyRewardDelegatorsContract() {
        require(msg.sender == rewardDelegatorsAddress, "Sender not Reward Delegators contract");
        _;
    }

    modifier onlyFeeder() {
        require(msg.sender == feeder, "Sender not feeder");
        _;
    }

    function initialize(
        address _owner, 
        address _rewardDelegatorsAddress, 
        bytes32[] memory _networkIds,
        uint256[] memory _rewardWeight,
        uint256 _totalRewardsPerEpoch, 
        address _PONDAddress,
        uint256 _payoutDenomination,
        address _feeder,
        uint256 _rewardDistributionWaitTime) 
        public
        initializer
    {
        require(
            _networkIds.length == _rewardWeight.length, 
            "CRW:I-Each NetworkId need a corresponding RewardPerEpoch and vice versa"
        );
        super.initialize(_owner);
        uint256 weight = 0;
        rewardDelegatorsAddress = _rewardDelegatorsAddress;
        for(uint256 i=0; i < _networkIds.length; i++) {
            rewardWeight[_networkIds[i]] = _rewardWeight[i];
            weight = weight.add(_rewardWeight[i]);
            emit NetworkAdded(_networkIds[i], _rewardWeight[i]);
        }
        totalWeight = weight;
        totalRewardsPerEpoch = _totalRewardsPerEpoch;
        POND = ERC20(_PONDAddress);
        payoutDenomination = _payoutDenomination;
        feeder = _feeder;
        rewardDistributionWaitTime = _rewardDistributionWaitTime;
    }

    function changeFeeder(address _newFeeder) external onlyOwner {
        feeder = _newFeeder;
        emit FeederChanged(_newFeeder);
    }

    function addNetwork(bytes32 _networkId, uint256 _rewardWeight) external onlyOwner {
        require(rewardWeight[_networkId] == 0, "CRW:AN-Network already exists");
        require(_rewardWeight != 0, "CRW:AN-Reward cant be 0");
        rewardWeight[_networkId] = _rewardWeight;
        totalWeight = totalWeight.add(_rewardWeight);
        emit NetworkAdded(_networkId, _rewardWeight);
    }

    function removeNetwork(bytes32 _networkId) external onlyOwner {
        uint256 networkWeight = rewardWeight[_networkId];
        require( networkWeight != 0, "CRW:RN-Network doesnt exist");
        delete rewardWeight[_networkId];
        totalWeight = totalWeight.sub(networkWeight);
        emit NetworkRemoved(_networkId);
    }

    function changeNetworkReward(bytes32 _networkId, uint256 _updatedRewardWeight) external onlyOwner {
        uint256 networkWeight = rewardWeight[_networkId];
        require( networkWeight != 0, "CRW:CNR-Network doesnt exist");
        rewardWeight[_networkId] = _updatedRewardWeight;
        totalWeight = totalWeight.sub(networkWeight).add(_updatedRewardWeight);
        emit NetworkRewardUpdated(_networkId, _updatedRewardWeight);
    }


    function feed(
        bytes32 _networkId, 
        address[] calldata _clusters, 
        uint256[] calldata _payouts, 
        uint256 _epoch
    ) external onlyFeeder {
        uint256 rewardDistributed = rewardDistributedPerEpoch[_epoch];
        if(rewardDistributed == 0) {
            require(
                block.timestamp > latestNewEpochRewardAt.add(rewardDistributionWaitTime), 
                "CRW:F-Cant distribute reward for new epoch within such short interval"
            );
            latestNewEpochRewardAt = block.timestamp;
        }
        uint256 totalNetworkWeight = totalWeight;
        uint256 currentTotalRewardsPerEpoch = totalRewardsPerEpoch;
        uint256 currentPayoutDenomination = payoutDenomination;
        uint256 networkRewardWeight = rewardWeight[_networkId];
        for(uint256 i=0; i < _clusters.length; i++) {
          uint256 clusterReward = currentTotalRewardsPerEpoch
                                    .mul(networkRewardWeight)
                                    .mul(_payouts[i])
                                    .div(totalNetworkWeight)
                                    .div(currentPayoutDenomination);
            rewardDistributed = rewardDistributed.add(clusterReward);
            clusterRewards[_clusters[i]] = clusterRewards[_clusters[i]].add(clusterReward);
        }
        require(
            rewardDistributed <= totalRewardsPerEpoch, 
            "CRW:F-Reward Distributed  cant  be more  than totalRewardPerEpoch"
        );
        rewardDistributedPerEpoch[_epoch] = rewardDistributed;
        emit ClusterRewarded(_networkId);
    }

    function getRewardPerEpoch(bytes32 _networkId) external view returns(uint256) {
        return totalRewardsPerEpoch.mul(rewardWeight[_networkId]).div(totalWeight);
    }

    // only cluster registry is necessary because the rewards 
    // should be updated in the cluster registry against the cluster
    function claimReward(address _cluster) external onlyRewardDelegatorsContract returns(uint256) {
        uint256 pendingRewards = clusterRewards[_cluster];
        if(pendingRewards > 1) {
            uint256 rewardsToTransfer = pendingRewards.sub(1);
            clusterRewards[_cluster] = 1;
            return rewardsToTransfer;
        }
        return 0;
    }

    function transferRewardsToRewardDelegators() external onlyOwner returns(uint256) {
        POND.transfer(rewardDelegatorsAddress, POND.balanceOf(address(this)));
    }

    function updateRewardDelegatorAddress(address _updatedRewardDelegator) external onlyOwner {
        require(
            _updatedRewardDelegator != address(0),
            "CRW:URDA-Updated Reward delegator address cant be 0"
        );
        rewardDelegatorsAddress = _updatedRewardDelegator;
        emit RewardDelegatorAddressUpdated(_updatedRewardDelegator);
    }

    function updatePONDAddress(address _updatedPOND) external onlyOwner {
        require(
            _updatedPOND != address(0),
            "CRW:UPA-POND token address cant be 0"
        );
        POND = ERC20(_updatedPOND);
        emit PONDAddressUpdated(_updatedPOND);
    }

    function changeRewardPerEpoch(uint256 _updatedRewardPerEpoch) external onlyOwner {
        totalRewardsPerEpoch = _updatedRewardPerEpoch;
        emit RewardPerEpochChanged(_updatedRewardPerEpoch);
    }

    function changePayoutDenomination(uint256 _updatedPayoutDenomination) external onlyOwner {
        payoutDenomination = _updatedPayoutDenomination;
        emit PayoutDenominationChanged(_updatedPayoutDenomination);
    }

    function updateRewardDistributionWaitTime(uint256 _updatedRewardDistributionWaitTime) external onlyOwner {
        rewardDistributionWaitTime = _updatedRewardDistributionWaitTime;
        emit RewardDistributionWaitTimeUpdated(_updatedRewardDistributionWaitTime);
    }
}

pragma solidity >=0.4.21 <0.7.0;


/// @title Contract to reward overlapping stakes
/// @author Marlin
/// @notice Use this contract only for testing
/// @dev Contract may or may not change in future (depending upon the new slots in proxy-store)
contract ClusterRegistryProxy {
    bytes32 internal constant IMPLEMENTATION_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.implementation")) - 1
    );
    bytes32 internal constant PROXY_ADMIN_SLOT = bytes32(
        uint256(keccak256("eip1967.proxy.admin")) - 1
    );

    constructor(address contractLogic, address proxyAdmin) public {
        // save the code address
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, contractLogic)
        }
        // save the proxy admin
        slot = PROXY_ADMIN_SLOT;
        address sender = proxyAdmin;
        assembly {
            sstore(slot, sender)
        }
    }

    function updateAdmin(address _newAdmin) public {
        require(
            msg.sender == getAdmin(),
            "Only the current admin should be able to new admin"
        );
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            sstore(slot, _newAdmin)
        }
    }

    /// @author Marlin
    /// @dev Only admin can update the contract
    /// @param _newLogic address is the address of the contract that has to updated to
    function updateLogic(address _newLogic) public {
        require(
            msg.sender == getAdmin(),
            "Only Admin should be able to update the contracts"
        );
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            sstore(slot, _newLogic)
        }
    }

    /// @author Marlin
    /// @dev use assembly as contract store slot is manually decided
    function getAdmin() internal view returns (address result) {
        bytes32 slot = PROXY_ADMIN_SLOT;
        assembly {
            result := sload(slot)
        }
    }

    /// @author Marlin
    /// @dev add functionality to forward the balance as well.
    function() external payable {
        bytes32 slot = IMPLEMENTATION_SLOT;
        assembly {
            let contractLogic := sload(slot)
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)

            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/
            
pragma solidity >=0.4.24 <0.7.0;


/**
 * @title Initializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 */
contract Initializable {

  /**
   * @dev Indicates that the contract has been initialized.
   */
  bool private initialized;

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

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");

    bool isTopLevelCall = !initializing;
    if (isTopLevelCall) {
      initializing = true;
      initialized = true;
    }

    _;

    if (isTopLevelCall) {
      initializing = false;
    }
  }

  /// @dev Returns true if and only if the function is running in the constructor
  function isConstructor() private view returns (bool) {
    // extcodesize checks the size of the code stored in an address, and
    // address returns the current address. Since the code is still not
    // deployed when running a constructor, any checks on its code size will
    // yield zero, making it an effective way to detect if a contract is
    // under construction or not.
    address self = address(this);
    uint256 cs;
    assembly { cs := extcodesize(self) }
    return cs == 0;
  }

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/
            
pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/
            
pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/
            
pragma solidity ^0.5.0;


/*
 * @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 GSN 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.
 */
contract Context is Initializable {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/
            
pragma solidity ^0.5.0;

////import "@openzeppelin/upgrades/contracts/Initializable.sol";

////import "../../GSN/Context.sol";
////import "./IERC20.sol";
////import "../../math/SafeMath.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Initializable, Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }

    uint256[50] private ______gap;
}




/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/
            
pragma solidity ^0.5.0;

////import "@openzeppelin/upgrades/contracts/Initializable.sol";

////import "../GSN/Context.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.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be aplied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Initializable, Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function initialize(address sender) public initializer {
        _owner = sender;
        emit OwnershipTransferred(address(0), _owner);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(isOwner(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Returns true if the caller is the current owner.
     */
    function isOwner() public view returns (bool) {
        return _msgSender() == _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 onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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 onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     */
    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }

    uint256[50] private ______gap;
}


/** 
 *  SourceUnit: /Users/prateekyammanuru/work/marlin/contracts_github/Contracts/contracts/Stake/ClusterRegistry.sol
*/

pragma solidity >=0.4.21 <0.7.0;


contract ClusterRegistry is Initializable, Ownable {

    using SafeMath for uint256;

    uint256 constant UINT256_MAX = ~uint256(0);

    struct Cluster {
        uint256 commission;
        address rewardAddress;
        address clientKey;
        bytes32 networkId; // keccak256("ETH") // token ticker for anyother chain in place of ETH
        Status status;
    }

    struct Lock {
        uint256 unlockBlock;
        uint256 iValue;
    }

    mapping(address => Cluster) clusters;

    mapping(bytes32 => Lock) public locks;
    mapping(bytes32 => uint256) public lockWaitTime;
    bytes32 constant COMMISSION_LOCK_SELECTOR = keccak256("COMMISSION_LOCK");
    bytes32 constant SWITCH_NETWORK_LOCK_SELECTOR = keccak256("SWITCH_NETWORK_LOCK");
    bytes32 constant UNREGISTER_LOCK_SELECTOR = keccak256("UNREGISTER_LOCK");

    enum Status{NOT_REGISTERED, REGISTERED}

    mapping(address => address) public clientKeys;

    event ClusterRegistered(
        address cluster, 
        bytes32 networkId, 
        uint256 commission, 
        address rewardAddress, 
        address clientKey
    );
    event CommissionUpdateRequested(address cluster, uint256 commissionAfterUpdate, uint256 effectiveBlock);
    event CommissionUpdated(address cluster, uint256 updatedCommission, uint256 updatedAt);
    event RewardAddressUpdated(address cluster, address updatedRewardAddress);
    event NetworkSwitchRequested(address cluster, bytes32 networkId, uint256 effectiveBlock);
    event NetworkSwitched(address cluster, bytes32 networkId, uint256 updatedAt);
    event ClientKeyUpdated(address cluster, address clientKey);
    event ClusterUnregisterRequested(address cluster, uint256 effectiveBlock);
    event ClusterUnregistered(address cluster, uint256 updatedAt);
    event LockTimeUpdated(bytes32 selector, uint256 prevLockTime, uint256 updatedLockTime);

    function initialize(bytes32[] memory _selectors, uint256[] memory _lockWaitTimes, address _owner) 
        public 
        initializer
    {
        require(
            _selectors.length == _lockWaitTimes.length,
            "CR:I-Invalid params"
        );
        for(uint256 i=0; i < _selectors.length; i++) {
            lockWaitTime[_selectors[i]] = _lockWaitTimes[i];
            emit LockTimeUpdated(_selectors[i], 0, _lockWaitTimes[i]);
        }
        super.initialize(_owner);
    }

    function updateLockWaitTime(bytes32 _selector, uint256 _updatedWaitTime) external onlyOwner {
        emit LockTimeUpdated(_selector, lockWaitTime[_selector], _updatedWaitTime);
        lockWaitTime[_selector] = _updatedWaitTime; 
    }

    function register(
        bytes32 _networkId, 
        uint256 _commission, 
        address _rewardAddress, 
        address _clientKey
    ) external returns(bool) {
        // This happens only when the data of the cluster is registered or it wasn't registered before
        require(
            !isClusterValid(msg.sender), 
            "CR:R-Cluster is already registered"
        );
        require(_commission <= 100, "CR:R-Commission more than 100%");
        require(clientKeys[_clientKey] ==  address(0), "CR:R - Client key is already used");
        clusters[msg.sender].commission = _commission;
        clusters[msg.sender].rewardAddress = _rewardAddress;
        clusters[msg.sender].clientKey = _clientKey;
        clusters[msg.sender].networkId = _networkId;
        clusters[msg.sender].status = Status.REGISTERED;

        clientKeys[_clientKey] = msg.sender;
        
        emit ClusterRegistered(msg.sender, _networkId, _commission, _rewardAddress, _clientKey);
    }

    function updateCluster(uint256 _commission, bytes32 _networkId, address _rewardAddress, address _clientKey) public {
        if(_networkId != bytes32(0)) {
            switchNetwork(_networkId);
        }
        if(_rewardAddress != address(0)) {
            updateRewardAddress(_rewardAddress);
        }
        if(_clientKey != address(0)) {
            updateClientKey(_clientKey);
        }
        if(_commission != UINT256_MAX) {
            updateCommission(_commission);
        }
    }

    function updateCommission(uint256 _commission) public {
        require(
            isClusterValid(msg.sender),
            "CR:UCM-Cluster not registered"
        );
        require(_commission <= 100, "CR:UCM-Commission more than 100%");
        bytes32 lockId = keccak256(abi.encodePacked(COMMISSION_LOCK_SELECTOR, msg.sender));
        uint256 unlockBlock = locks[lockId].unlockBlock;
        require(
            unlockBlock < block.number, 
            "CR:UCM-Commission update in progress"
        );
        if(unlockBlock != 0) {
            uint256 currentCommission = locks[lockId].iValue;
            clusters[msg.sender].commission = currentCommission;
            emit CommissionUpdated(msg.sender, currentCommission, unlockBlock);
        }
        uint256 updatedUnlockBlock = block.number.add(lockWaitTime[COMMISSION_LOCK_SELECTOR]);
        locks[lockId] = Lock(updatedUnlockBlock, _commission);
        emit CommissionUpdateRequested(msg.sender, _commission, updatedUnlockBlock);
    }

    function switchNetwork(bytes32 _networkId) public {
        require(
            isClusterValid(msg.sender),
            "CR:SN-Cluster not registered"
        );
        bytes32 lockId = keccak256(abi.encodePacked(SWITCH_NETWORK_LOCK_SELECTOR, msg.sender));
        uint256 unlockBlock = locks[lockId].unlockBlock;
        require(
            unlockBlock < block.number,
            "CR:SN-Network switch in progress"
        );
        if(unlockBlock != 0) {
            bytes32 currentNetwork = bytes32(locks[lockId].iValue);
            clusters[msg.sender].networkId = currentNetwork;
            emit NetworkSwitched(msg.sender, currentNetwork, unlockBlock);
        }
        uint256 updatedUnlockBlock = block.number.add(lockWaitTime[SWITCH_NETWORK_LOCK_SELECTOR]);
        locks[lockId] = Lock(updatedUnlockBlock, uint256(_networkId));
        emit NetworkSwitchRequested(msg.sender, _networkId, updatedUnlockBlock);
    }

    function updateRewardAddress(address _rewardAddress) public {
        require(
            isClusterValid(msg.sender),
            "CR:URA-Cluster not registered"
        );
        clusters[msg.sender].rewardAddress = _rewardAddress;
        emit RewardAddressUpdated(msg.sender, _rewardAddress);
    }

    function updateClientKey(address _clientKey) public {
        // TODO: Add delay to client key updates as well
        require(
            isClusterValid(msg.sender),
            "CR:UCK-Cluster not registered"
        );
        require(clientKeys[_clientKey] ==  address(0), "CR:UCK - Client key is already used");
        delete clientKeys[clusters[msg.sender].clientKey];
        clusters[msg.sender].clientKey = _clientKey;
        clientKeys[_clientKey] = msg.sender;
        emit ClientKeyUpdated(msg.sender, _clientKey);
    }

    function unregister() external {
        require(
            clusters[msg.sender].status != Status.NOT_REGISTERED,
            "CR:UR-Cluster not registered"
        );
        bytes32 lockId = keccak256(abi.encodePacked(UNREGISTER_LOCK_SELECTOR, msg.sender));
        uint256 unlockBlock = locks[lockId].unlockBlock;
        require(
            unlockBlock < block.number,
            "CR:UR-Unregistration already in progress"
        );
        if(unlockBlock != 0) {
            clusters[msg.sender].status = Status.NOT_REGISTERED;
            emit ClusterUnregistered(msg.sender, unlockBlock);
            delete clientKeys[clusters[msg.sender].clientKey];
            delete locks[lockId];
            delete locks[keccak256(abi.encodePacked(COMMISSION_LOCK_SELECTOR, msg.sender))];
            delete locks[keccak256(abi.encodePacked(SWITCH_NETWORK_LOCK_SELECTOR, msg.sender))];
            return;
        }
        uint256 updatedUnlockBlock = block.number.add(lockWaitTime[UNREGISTER_LOCK_SELECTOR]);
        locks[lockId] = Lock(updatedUnlockBlock, 0);
        emit ClusterUnregisterRequested(msg.sender, updatedUnlockBlock);
    }

    function isClusterValid(address _cluster) public returns(bool) {
        bytes32 lockId = keccak256(abi.encodePacked(UNREGISTER_LOCK_SELECTOR, _cluster));
        uint256 unlockBlock = locks[lockId].unlockBlock;
        if(unlockBlock != 0 && unlockBlock < block.number) {
            clusters[_cluster].status = Status.NOT_REGISTERED;
            delete clientKeys[clusters[_cluster].clientKey];
            emit ClusterUnregistered(_cluster, unlockBlock);
            delete locks[lockId];
            delete locks[keccak256(abi.encodePacked(COMMISSION_LOCK_SELECTOR, msg.sender))];
            delete locks[keccak256(abi.encodePacked(SWITCH_NETWORK_LOCK_SELECTOR, msg.sender))];
            return false;
        }
        return (clusters[_cluster].status != Status.NOT_REGISTERED);    // returns true if the status is registered
    }

    function getCommission(address _cluster) public returns(uint256) {
        bytes32 lockId = keccak256(abi.encodePacked(COMMISSION_LOCK_SELECTOR, _cluster));
        uint256 unlockBlock = locks[lockId].unlockBlock;
        if(unlockBlock != 0 && unlockBlock < block.number) {
            uint256 currentCommission = locks[lockId].iValue;
            clusters[_cluster].commission = currentCommission;
            emit CommissionUpdated(_cluster, currentCommission, unlockBlock);
            delete locks[lockId];
            return currentCommission;
        }
        return clusters[_cluster].commission;
    }

    function getNetwork(address _cluster) public returns(bytes32) {
        bytes32 lockId = keccak256(abi.encodePacked(SWITCH_NETWORK_LOCK_SELECTOR, _cluster));
        uint256 unlockBlock = locks[lockId].unlockBlock;
        if(unlockBlock != 0 && unlockBlock < block.number) {
            bytes32 currentNetwork = bytes32(locks[lockId].iValue);
            clusters[msg.sender].networkId = currentNetwork;
            emit NetworkSwitched(msg.sender, currentNetwork, unlockBlock);
            delete locks[lockId];
            return currentNetwork;
        }
        return clusters[_cluster].networkId;
    }

    function getRewardAddress(address _cluster) external view returns(address) {
        return clusters[_cluster].rewardAddress;
    }

    function getClientKey(address _cluster) external view returns(address) {
        return clusters[_cluster].clientKey;
    }

    function getCluster(address _cluster) external returns(
        uint256 commission, 
        address rewardAddress, 
        address clientKey, 
        bytes32 networkId, 
        bool isValidCluster
    ) {
        return (
            getCommission(_cluster), 
            clusters[_cluster].rewardAddress, 
            clusters[_cluster].clientKey, 
            getNetwork(_cluster), 
            isClusterValid(_cluster)
        );
    }

    function getRewardInfo(address _cluster) external returns(uint256, address) {
        return (getCommission(_cluster), clusters[_cluster].rewardAddress);
    }
    
    function addClientKeys(address[] calldata _clusters) external onlyOwner {
        for(uint256 i=0; i < _clusters.length; i++) {
            address _clientKey = clusters[_clusters[i]].clientKey;
            require(_clientKey != address(0), "CR:ACK - Cluster has invalid client key");
            clientKeys[_clientKey] = _clusters[i];
        }
    }
}

// File: @openzeppelin/upgrades/contracts/Initializable.sol

pragma solidity >=0.4.24 <0.7.0;


/**
 * @title Initializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 */
contract Initializable {

  /**
   * @dev Indicates that the contract has been initialized.
   */
  bool private initialized;

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

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");

    bool isTopLevelCall = !initializing;
    if (isTopLevelCall) {
      initializing = true;
      initialized = true;
    }

    _;

    if (isTopLevelCall) {
      initializing = false;
    }
  }

  /// @dev Returns true if and only if the function is running in the constructor
  function isConstructor() private view returns (bool) {
    // extcodesize checks the size of the code stored in an address, and
    // address returns the current address. Since the code is still not
    // deployed when running a constructor, any checks on its code size will
    // yield zero, making it an effective way to detect if a contract is
    // under construction or not.
    address self = address(this);
    uint256 cs;
    assembly { cs := extcodesize(self) }
    return cs == 0;
  }

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}

// File: @openzeppelin/contracts-ethereum-package/contracts/GSN/Context.sol

pragma solidity ^0.5.0;

/*
 * @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 not should not be accessed in such a direct
 * manner, since when dealing with GSN 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.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, with should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

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

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol

pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see `ERC20Detailed`.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a `Transfer` event.
     */
    function transfer(address recipient, 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.
     *
     * > 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @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);
}

// File: @openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol

pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, "SafeMath: division by zero");
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0, "SafeMath: modulo by zero");
        return a % b;
    }
}

// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20.sol

pragma solidity ^0.5.0;





/**
 * @dev Implementation of the `IERC20` interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using `_mint`.
 * For a generic mechanism see `ERC20Mintable`.
 *
 * *For a detailed writeup see our guide [How to implement supply
 * mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).*
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an `Approval` event is emitted on calls to `transferFrom`.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard `decreaseAllowance` and `increaseAllowance`
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See `IERC20.approve`.
 */
contract ERC20 is Initializable, Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    /**
     * @dev See `IERC20.totalSupply`.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See `IERC20.balanceOf`.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See `IERC20.transfer`.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 value) public returns (bool) {
        _transfer(_msgSender(), to, value);
        return true;
    }

    /**
     * @dev See `IERC20.allowance`.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See `IERC20.approve`.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 value) public returns (bool) {
        _approve(_msgSender(), spender, value);
        return true;
    }

    /**
     * @dev See `IERC20.transferFrom`.
     *
     * Emits an `Approval` event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of `ERC20`;
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `value`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        _transfer(from, to, value);
        _approve(from, _msgSender(), _allowances[from][_msgSender()].sub(value));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to `approve` that can be used as a mitigation for
     * problems described in `IERC20.approve`.
     *
     * Emits an `Approval` event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to `approve` that can be used as a mitigation for
     * problems described in `IERC20.approve`.
     *
     * Emits an `Approval` event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to `transfer`, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a `Transfer` event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount);
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a `Transfer` event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

     /**
     * @dev Destoys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a `Transfer` event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 value) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _totalSupply = _totalSupply.sub(value);
        _balances[account] = _balances[account].sub(value);
        emit Transfer(account, address(0), value);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an `Approval` event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 value) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    /**
     * @dev Destoys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See `_burn` and `_approve`.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount));
    }

    uint256[50] private ______gap;
}

// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Detailed.sol

pragma solidity ^0.5.0;



/**
 * @dev Optional functions from the ERC20 standard.
 */
contract ERC20Detailed is Initializable, IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
     * these values are immutable: they can only be set once during
     * construction.
     */
    function initialize(string memory name, string memory symbol, uint8 decimals) public initializer {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei.
     *
     * > Note that this information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * `IERC20.balanceOf` and `IERC20.transfer`.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }

    uint256[50] private ______gap;
}

// File: @openzeppelin/contracts-ethereum-package/contracts/access/Roles.sol

pragma solidity ^0.5.0;

/**
 * @title Roles
 * @dev Library for managing addresses assigned to a Role.
 */
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev Give an account access to this role.
     */
    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    /**
     * @dev Remove an account's access to this role.
     */
    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    /**
     * @dev Check if an account has this role.
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

// File: @openzeppelin/contracts-ethereum-package/contracts/access/roles/MinterRole.sol

pragma solidity ^0.5.0;




contract MinterRole is Initializable, Context {
    using Roles for Roles.Role;

    event MinterAdded(address indexed account);
    event MinterRemoved(address indexed account);

    Roles.Role private _minters;

    function initialize(address sender) public initializer {
        if (!isMinter(sender)) {
            _addMinter(sender);
        }
    }

    modifier onlyMinter() {
        require(isMinter(_msgSender()), "MinterRole: caller does not have the Minter role");
        _;
    }

    function isMinter(address account) public view returns (bool) {
        return _minters.has(account);
    }

    function addMinter(address account) public onlyMinter {
        _addMinter(account);
    }

    function renounceMinter() public {
        _removeMinter(_msgSender());
    }

    function _addMinter(address account) internal {
        _minters.add(account);
        emit MinterAdded(account);
    }

    function _removeMinter(address account) internal {
        _minters.remove(account);
        emit MinterRemoved(account);
    }

    uint256[50] private ______gap;
}

// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Mintable.sol

pragma solidity ^0.5.0;




/**
 * @dev Extension of `ERC20` that adds a set of accounts with the `MinterRole`,
 * which have permission to mint (create) new tokens as they see fit.
 *
 * At construction, the deployer of the contract is the only minter.
 */
contract ERC20Mintable is Initializable, ERC20, MinterRole {
    function initialize(address sender) public initializer {
        MinterRole.initialize(sender);
    }

    /**
     * @dev See `ERC20._mint`.
     *
     * Requirements:
     *
     * - the caller must have the `MinterRole`.
     */
    function mint(address account, uint256 amount) public onlyMinter returns (bool) {
        _mint(account, amount);
        return true;
    }

    uint256[50] private ______gap;
}

// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Capped.sol

pragma solidity ^0.5.0;



/**
 * @dev Extension of `ERC20Mintable` that adds a cap to the supply of tokens.
 */
contract ERC20Capped is Initializable, ERC20Mintable {
    uint256 private _cap;

    /**
     * @dev Sets the value of the `cap`. This value is immutable, it can only be
     * set once during construction.
     */
    function initialize(uint256 cap, address sender) public initializer {
        ERC20Mintable.initialize(sender);

        require(cap > 0, "ERC20Capped: cap is 0");
        _cap = cap;
    }

    /**
     * @dev Returns the cap on the token's total supply.
     */
    function cap() public view returns (uint256) {
        return _cap;
    }

    /**
     * @dev See `ERC20Mintable.mint`.
     *
     * Requirements:
     *
     * - `value` must not cause the total supply to go over the cap.
     */
    function _mint(address account, uint256 value) internal {
        require(totalSupply().add(value) <= _cap, "ERC20Capped: cap exceeded");
        super._mint(account, value);
    }

    uint256[50] private ______gap;
}

// File: @openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Burnable.sol

pragma solidity ^0.5.0;




/**
 * @dev Extension of `ERC20` that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
contract ERC20Burnable is Initializable, Context, ERC20 {
    /**
     * @dev Destoys `amount` tokens from the caller.
     *
     * See `ERC20._burn`.
     */
    function burn(uint256 amount) public {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev See `ERC20._burnFrom`.
     */
    function burnFrom(address account, uint256 amount) public {
        _burnFrom(account, amount);
    }

    uint256[50] private ______gap;
}

// File: contracts/Token/TokenLogic.sol

pragma solidity 0.5.17;



// import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/ERC20Mintable.sol";




contract TokenLogic is
    Initializable,
    ERC20,
    ERC20Detailed,
    // ERC20Mintable,
    ERC20Capped,
    ERC20Burnable
{
    function initialize(
        string memory _name,
        string memory _symbol,
        uint8 _decimal,
        address _bridge
    ) public initializer {
        ERC20Detailed.initialize(_name, _symbol, _decimal);
        // ERC20Mintable.initialize(msg.sender);
        ERC20Capped.initialize(10000000000e18, msg.sender);
        mint(_bridge, 1000000000e18);
    }
}