pragma solidity 0.4.18;

// File: contracts/ERC20Interface.sol

// https://github.com/ethereum/EIPs/issues/20
interface ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address _owner) public view returns (uint balance);
    function transfer(address _to, uint _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint _value) public returns (bool success);
    function approve(address _spender, uint _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint remaining);
    function decimals() public view returns(uint digits);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

// File: contracts/KyberNetworkInterface.sol

/// @title Kyber Network interface
interface KyberNetworkInterface {
    function maxGasPrice() public view returns(uint);
    function getUserCapInWei(address user) public view returns(uint);
    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint);
    function enabled() public view returns(bool);
    function info(bytes32 id) public view returns(uint);

    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view
        returns (uint expectedRate, uint slippageRate);

    function tradeWithHint(address trader, ERC20 src, uint srcAmount, ERC20 dest, address destAddress,
        uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint);
}

// File: contracts/KyberNetworkProxyInterface.sol

/// @title Kyber Network interface
interface KyberNetworkProxyInterface {
    function maxGasPrice() public view returns(uint);
    function getUserCapInWei(address user) public view returns(uint);
    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint);
    function enabled() public view returns(bool);
    function info(bytes32 id) public view returns(uint);

    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view
        returns (uint expectedRate, uint slippageRate);

    function tradeWithHint(ERC20 src, uint srcAmount, ERC20 dest, address destAddress, uint maxDestAmount,
        uint minConversionRate, address walletId, bytes hint) public payable returns(uint);
}

// File: contracts/SimpleNetworkInterface.sol

/// @title simple interface for Kyber Network 
interface SimpleNetworkInterface {
    function swapTokenToToken(ERC20 src, uint srcAmount, ERC20 dest, uint minConversionRate) public returns(uint);
    function swapEtherToToken(ERC20 token, uint minConversionRate) public payable returns(uint);
    function swapTokenToEther(ERC20 token, uint srcAmount, uint minConversionRate) public returns(uint);
}

// File: contracts/Utils.sol

/// @title Kyber constants contract
contract Utils {

    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);
    uint  constant internal PRECISION = (10**18);
    uint  constant internal MAX_QTY   = (10**28); // 10B tokens
    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH
    uint  constant internal MAX_DECIMALS = 18;
    uint  constant internal ETH_DECIMALS = 18;
    mapping(address=>uint) internal decimals;

    function setDecimals(ERC20 token) internal {
        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;
        else decimals[token] = token.decimals();
    }

    function getDecimals(ERC20 token) internal view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
        uint tokenDecimals = decimals[token];
        // technically, there might be token with decimals 0
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        if(tokenDecimals == 0) return token.decimals();

        return tokenDecimals;
    }

    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(srcQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(dstQty <= MAX_QTY);
        require(rate <= MAX_RATE);
        
        //source quantity is rounded up. to avoid dest quantity being too low.
        uint numerator;
        uint denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }
}

// File: contracts/Utils2.sol

contract Utils2 is Utils {

    /// @dev get the balance of a user.
    /// @param token The token type
    /// @return The balance
    function getBalance(ERC20 token, address user) public view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS)
            return user.balance;
        else
            return token.balanceOf(user);
    }

    function getDecimalsSafe(ERC20 token) internal returns(uint) {

        if (decimals[token] == 0) {
            setDecimals(token);
        }

        return decimals[token];
    }

    function calcDestAmount(ERC20 src, ERC20 dest, uint srcAmount, uint rate) internal view returns(uint) {
        return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);
    }

    function calcSrcAmount(ERC20 src, ERC20 dest, uint destAmount, uint rate) internal view returns(uint) {
        return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);
    }

    function calcRateFromQty(uint srcAmount, uint destAmount, uint srcDecimals, uint dstDecimals)
        internal pure returns(uint)
    {
        require(srcAmount <= MAX_QTY);
        require(destAmount <= MAX_QTY);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (destAmount * PRECISION / ((10 ** (dstDecimals - srcDecimals)) * srcAmount));
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (destAmount * PRECISION * (10 ** (srcDecimals - dstDecimals)) / srcAmount);
        }
    }
}

// File: contracts/PermissionGroups.sol

contract PermissionGroups {

    address public admin;
    address public pendingAdmin;
    mapping(address=>bool) internal operators;
    mapping(address=>bool) internal alerters;
    address[] internal operatorsGroup;
    address[] internal alertersGroup;
    uint constant internal MAX_GROUP_SIZE = 50;

    function PermissionGroups() public {
        admin = msg.sender;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin);
        _;
    }

    modifier onlyOperator() {
        require(operators[msg.sender]);
        _;
    }

    modifier onlyAlerter() {
        require(alerters[msg.sender]);
        _;
    }

    function getOperators () external view returns(address[]) {
        return operatorsGroup;
    }

    function getAlerters () external view returns(address[]) {
        return alertersGroup;
    }

    event TransferAdminPending(address pendingAdmin);

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(pendingAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(newAdmin);
        AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    event AdminClaimed( address newAdmin, address previousAdmin);

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender);
        AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }

    event AlerterAdded (address newAlerter, bool isAdd);

    function addAlerter(address newAlerter) public onlyAdmin {
        require(!alerters[newAlerter]); // prevent duplicates.
        require(alertersGroup.length < MAX_GROUP_SIZE);

        AlerterAdded(newAlerter, true);
        alerters[newAlerter] = true;
        alertersGroup.push(newAlerter);
    }

    function removeAlerter (address alerter) public onlyAdmin {
        require(alerters[alerter]);
        alerters[alerter] = false;

        for (uint i = 0; i < alertersGroup.length; ++i) {
            if (alertersGroup[i] == alerter) {
                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
                alertersGroup.length--;
                AlerterAdded(alerter, false);
                break;
            }
        }
    }

    event OperatorAdded(address newOperator, bool isAdd);

    function addOperator(address newOperator) public onlyAdmin {
        require(!operators[newOperator]); // prevent duplicates.
        require(operatorsGroup.length < MAX_GROUP_SIZE);

        OperatorAdded(newOperator, true);
        operators[newOperator] = true;
        operatorsGroup.push(newOperator);
    }

    function removeOperator (address operator) public onlyAdmin {
        require(operators[operator]);
        operators[operator] = false;

        for (uint i = 0; i < operatorsGroup.length; ++i) {
            if (operatorsGroup[i] == operator) {
                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
                operatorsGroup.length -= 1;
                OperatorAdded(operator, false);
                break;
            }
        }
    }
}

// File: contracts/Withdrawable.sol

/**
 * @title Contracts that should be able to recover tokens or ethers
 * @author Ilan Doron
 * @dev This allows to recover any tokens or Ethers received in a contract.
 * This will prevent any accidental loss of tokens.
 */
contract Withdrawable is PermissionGroups {

    event TokenWithdraw(ERC20 token, uint amount, address sendTo);

    /**
     * @dev Withdraw all ERC20 compatible tokens
     * @param token ERC20 The address of the token contract
     */
    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {
        require(token.transfer(sendTo, amount));
        TokenWithdraw(token, amount, sendTo);
    }

    event EtherWithdraw(uint amount, address sendTo);

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint amount, address sendTo) external onlyAdmin {
        sendTo.transfer(amount);
        EtherWithdraw(amount, sendTo);
    }
}

// File: contracts/KyberNetworkProxy.sol

////////////////////////////////////////////////////////////////////////////////////////////////////////
/// @title Kyber Network proxy for main contract
contract KyberNetworkProxy is KyberNetworkProxyInterface, SimpleNetworkInterface, Withdrawable, Utils2 {

    KyberNetworkInterface public kyberNetworkContract;

    function KyberNetworkProxy(address _admin) public {
        require(_admin != address(0));
        admin = _admin;
    }

    /// @notice use token address ETH_TOKEN_ADDRESS for ether
    /// @dev makes a trade between src and dest token and send dest token to destAddress
    /// @param src Src token
    /// @param srcAmount amount of src tokens
    /// @param dest   Destination token
    /// @param destAddress Address to send tokens to
    /// @param maxDestAmount A limit on the amount of dest tokens
    /// @param minConversionRate The minimal conversion rate. If actual rate is lower, trade is canceled.
    /// @param walletId is the wallet ID to send part of the fees
    /// @return amount of actual dest tokens
    function trade(
        ERC20 src,
        uint srcAmount,
        ERC20 dest,
        address destAddress,
        uint maxDestAmount,
        uint minConversionRate,
        address walletId
    )
        public
        payable
        returns(uint)
    {
        bytes memory hint;

        return tradeWithHint(
            src,
            srcAmount,
            dest,
            destAddress,
            maxDestAmount,
            minConversionRate,
            walletId,
            hint
        );
    }

    /// @dev makes a trade between src and dest token and send dest tokens to msg sender
    /// @param src Src token
    /// @param srcAmount amount of src tokens
    /// @param dest Destination token
    /// @param minConversionRate The minimal conversion rate. If actual rate is lower, trade is canceled.
    /// @return amount of actual dest tokens
    function swapTokenToToken(
        ERC20 src,
        uint srcAmount,
        ERC20 dest,
        uint minConversionRate
    )
        public
        returns(uint)
    {
        bytes memory hint;

        return tradeWithHint(
            src,
            srcAmount,
            dest,
            msg.sender,
            MAX_QTY,
            minConversionRate,
            0,
            hint
        );
    }

    /// @dev makes a trade from Ether to token. Sends token to msg sender
    /// @param token Destination token
    /// @param minConversionRate The minimal conversion rate. If actual rate is lower, trade is canceled.
    /// @return amount of actual dest tokens
    function swapEtherToToken(ERC20 token, uint minConversionRate) public payable returns(uint) {
        bytes memory hint;

        return tradeWithHint(
            ETH_TOKEN_ADDRESS,
            msg.value,
            token,
            msg.sender,
            MAX_QTY,
            minConversionRate,
            0,
            hint
        );
    }

    /// @dev makes a trade from token to Ether, sends Ether to msg sender
    /// @param token Src token
    /// @param srcAmount amount of src tokens
    /// @param minConversionRate The minimal conversion rate. If actual rate is lower, trade is canceled.
    /// @return amount of actual dest tokens
    function swapTokenToEther(ERC20 token, uint srcAmount, uint minConversionRate) public returns(uint) {
        bytes memory hint;

        return tradeWithHint(
            token,
            srcAmount,
            ETH_TOKEN_ADDRESS,
            msg.sender,
            MAX_QTY,
            minConversionRate,
            0,
            hint
        );
    }

    struct UserBalance {
        uint srcBalance;
        uint destBalance;
    }

    event ExecuteTrade(address indexed trader, ERC20 src, ERC20 dest, uint actualSrcAmount, uint actualDestAmount);

    /// @notice use token address ETH_TOKEN_ADDRESS for ether
    /// @dev makes a trade between src and dest token and send dest token to destAddress
    /// @param src Src token
    /// @param srcAmount amount of src tokens
    /// @param dest Destination token
    /// @param destAddress Address to send tokens to
    /// @param maxDestAmount A limit on the amount of dest tokens
    /// @param minConversionRate The minimal conversion rate. If actual rate is lower, trade is canceled.
    /// @param walletId is the wallet ID to send part of the fees
    /// @param hint will give hints for the trade.
    /// @return amount of actual dest tokens
    function tradeWithHint(
        ERC20 src,
        uint srcAmount,
        ERC20 dest,
        address destAddress,
        uint maxDestAmount,
        uint minConversionRate,
        address walletId,
        bytes hint
    )
        public
        payable
        returns(uint)
    {
        require(src == ETH_TOKEN_ADDRESS || msg.value == 0);
        
        UserBalance memory userBalanceBefore;

        userBalanceBefore.srcBalance = getBalance(src, msg.sender);
        userBalanceBefore.destBalance = getBalance(dest, destAddress);

        if (src == ETH_TOKEN_ADDRESS) {
            userBalanceBefore.srcBalance += msg.value;
        } else {
            require(src.transferFrom(msg.sender, kyberNetworkContract, srcAmount));
        }

        uint reportedDestAmount = kyberNetworkContract.tradeWithHint.value(msg.value)(
            msg.sender,
            src,
            srcAmount,
            dest,
            destAddress,
            maxDestAmount,
            minConversionRate,
            walletId,
            hint
        );

        TradeOutcome memory tradeOutcome = calculateTradeOutcome(
            userBalanceBefore.srcBalance,
            userBalanceBefore.destBalance,
            src,
            dest,
            destAddress
        );

        require(reportedDestAmount == tradeOutcome.userDeltaDestAmount);
        require(tradeOutcome.userDeltaDestAmount <= maxDestAmount);
        require(tradeOutcome.actualRate >= minConversionRate);

        ExecuteTrade(msg.sender, src, dest, tradeOutcome.userDeltaSrcAmount, tradeOutcome.userDeltaDestAmount);
        return tradeOutcome.userDeltaDestAmount;
    }

    event KyberNetworkSet(address newNetworkContract, address oldNetworkContract);

    function setKyberNetworkContract(KyberNetworkInterface _kyberNetworkContract) public onlyAdmin {

        require(_kyberNetworkContract != address(0));

        KyberNetworkSet(_kyberNetworkContract, kyberNetworkContract);

        kyberNetworkContract = _kyberNetworkContract;
    }

    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty)
        public view
        returns(uint expectedRate, uint slippageRate)
    {
        return kyberNetworkContract.getExpectedRate(src, dest, srcQty);
    }

    function getUserCapInWei(address user) public view returns(uint) {
        return kyberNetworkContract.getUserCapInWei(user);
    }

    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint) {
        return kyberNetworkContract.getUserCapInTokenWei(user, token);
    }

    function maxGasPrice() public view returns(uint) {
        return kyberNetworkContract.maxGasPrice();
    }

    function enabled() public view returns(bool) {
        return kyberNetworkContract.enabled();
    }

    function info(bytes32 field) public view returns(uint) {
        return kyberNetworkContract.info(field);
    }

    struct TradeOutcome {
        uint userDeltaSrcAmount;
        uint userDeltaDestAmount;
        uint actualRate;
    }

    function calculateTradeOutcome (uint srcBalanceBefore, uint destBalanceBefore, ERC20 src, ERC20 dest,
        address destAddress)
        internal returns(TradeOutcome outcome)
    {
        uint userSrcBalanceAfter;
        uint userDestBalanceAfter;

        userSrcBalanceAfter = getBalance(src, msg.sender);
        userDestBalanceAfter = getBalance(dest, destAddress);

        //protect from underflow
        require(userDestBalanceAfter > destBalanceBefore);
        require(srcBalanceBefore > userSrcBalanceAfter);

        outcome.userDeltaDestAmount = userDestBalanceAfter - destBalanceBefore;
        outcome.userDeltaSrcAmount = srcBalanceBefore - userSrcBalanceAfter;

        outcome.actualRate = calcRateFromQty(
                outcome.userDeltaSrcAmount,
                outcome.userDeltaDestAmount,
                getDecimalsSafe(src),
                getDecimalsSafe(dest)
            );
    }
}

{"ERC20Interface.sol":{"content":"pragma solidity 0.4.18;\n\n\n// https://github.com/ethereum/EIPs/issues/20\ninterface ERC20 {\n    function totalSupply() public view returns (uint supply);\n    function balanceOf(address _owner) public view returns (uint balance);\n    function transfer(address _to, uint _value) public returns (bool success);\n    function transferFrom(address _from, address _to, uint _value) public returns (bool success);\n    function approve(address _spender, uint _value) public returns (bool success);\n    function allowance(address _owner, address _spender) public view returns (uint remaining);\n    function decimals() public view returns(uint digits);\n    event Approval(address indexed _owner, address indexed _spender, uint _value);\n}\n"},"ExpectedRateInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\n\n\ninterface ExpectedRateInterface {\n    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty, bool usePermissionless) public view\n        returns (uint expectedRate, uint slippageRate);\n}\n"},"FeeBurnerInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\ninterface FeeBurnerInterface {\n    function handleFees (uint tradeWeiAmount, address reserve, address wallet) public returns(bool);\n    function setReserveData(address reserve, uint feesInBps, address kncWallet) public;\n}\n"},"KyberNetwork.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\nimport \"./KyberReserveInterface.sol\";\nimport \"./KyberNetworkInterface.sol\";\nimport \"./Withdrawable.sol\";\nimport \"./Utils3.sol\";\nimport \"./WhiteListInterface.sol\";\nimport \"./ExpectedRateInterface.sol\";\nimport \"./FeeBurnerInterface.sol\";\n\n\n/**\n * @title Helps contracts guard against reentrancy attacks.\n */\ncontract ReentrancyGuard {\n\n    /// @dev counter to allow mutex lock with only one SSTORE operation\n    uint256 private guardCounter = 1;\n\n    /**\n     * @dev Prevents a function from calling itself, directly or indirectly.\n     * Calling one `nonReentrant` function from\n     * another is not supported. Instead, you can implement a\n     * `private` function doing the actual work, and an `external`\n     * wrapper marked as `nonReentrant`.\n     */\n    modifier nonReentrant() {\n        guardCounter += 1;\n        uint256 localCounter = guardCounter;\n        _;\n        require(localCounter == guardCounter);\n    }\n}\n\n\n////////////////////////////////////////////////////////////////////////////////////////////////////////\n/// @title Kyber Network main contract\ncontract KyberNetwork is Withdrawable, Utils3, KyberNetworkInterface, ReentrancyGuard {\n\n    bytes public constant PERM_HINT = \"PERM\";\n    uint  public constant PERM_HINT_GET_RATE = 1 \u003c\u003c 255; // for get rate. bit mask hint.\n\n    uint public negligibleRateDiff = 10; // basic rate steps will be in 0.01%\n    KyberReserveInterface[] public reserves;\n    mapping(address=\u003eReserveType) public reserveType;\n    WhiteListInterface public whiteListContract;\n    ExpectedRateInterface public expectedRateContract;\n    FeeBurnerInterface    public feeBurnerContract;\n    address               public kyberNetworkProxyContract;\n    uint                  public maxGasPriceValue = 50 * 1000 * 1000 * 1000; // 50 gwei\n    bool                  public isEnabled = false; // network is enabled\n    mapping(bytes32=\u003euint) public infoFields; // this is only a UI field for external app.\n\n    mapping(address=\u003eaddress[]) public reservesPerTokenSrc; //reserves supporting token to eth\n    mapping(address=\u003eaddress[]) public reservesPerTokenDest;//reserves support eth to token\n\n    enum ReserveType {NONE, PERMISSIONED, PERMISSIONLESS}\n    bytes internal constant EMPTY_HINT = \"\";\n\n    function KyberNetwork(address _admin) public {\n        require(_admin != address(0));\n        admin = _admin;\n    }\n\n    event EtherReceival(address indexed sender, uint amount);\n\n    /* solhint-disable no-complex-fallback */\n    function() public payable {\n        EtherReceival(msg.sender, msg.value);\n    }\n    /* solhint-enable no-complex-fallback */\n\n    struct TradeInput {\n        address trader;\n        ERC20 src;\n        uint srcAmount;\n        ERC20 dest;\n        address destAddress;\n        uint maxDestAmount;\n        uint minConversionRate;\n        address walletId;\n        bytes hint;\n    }\n\n    function tradeWithHint(\n        address trader,\n        ERC20 src,\n        uint srcAmount,\n        ERC20 dest,\n        address destAddress,\n        uint maxDestAmount,\n        uint minConversionRate,\n        address walletId,\n        bytes hint\n    )\n        public\n        nonReentrant\n        payable\n        returns(uint)\n    {\n        require(msg.sender == kyberNetworkProxyContract);\n        require((hint.length == 0) || (hint.length == 4));\n\n        TradeInput memory tradeInput;\n\n        tradeInput.trader = trader;\n        tradeInput.src = src;\n        tradeInput.srcAmount = srcAmount;\n        tradeInput.dest = dest;\n        tradeInput.destAddress = destAddress;\n        tradeInput.maxDestAmount = maxDestAmount;\n        tradeInput.minConversionRate = minConversionRate;\n        tradeInput.walletId = walletId;\n        tradeInput.hint = hint;\n\n        return trade(tradeInput);\n    }\n\n    event AddReserveToNetwork(KyberReserveInterface indexed reserve, bool add, bool isPermissionless);\n\n    /// @notice can be called only by operator\n    /// @dev add or deletes a reserve to/from the network.\n    /// @param reserve The reserve address.\n    /// @param isPermissionless is the new reserve from permissionless type.\n    function addReserve(KyberReserveInterface reserve, bool isPermissionless) public onlyOperator\n        returns(bool)\n    {\n        require(reserveType[reserve] == ReserveType.NONE);\n        reserves.push(reserve);\n\n        reserveType[reserve] = isPermissionless ? ReserveType.PERMISSIONLESS : ReserveType.PERMISSIONED;\n\n        AddReserveToNetwork(reserve, true, isPermissionless);\n\n        return true;\n    }\n\n    event RemoveReserveFromNetwork(KyberReserveInterface reserve);\n\n    /// @notice can be called only by operator\n    /// @dev removes a reserve from Kyber network.\n    /// @param reserve The reserve address.\n    /// @param index in reserve array.\n    function removeReserve(KyberReserveInterface reserve, uint index) public onlyOperator\n        returns(bool)\n    {\n\n        require(reserveType[reserve] != ReserveType.NONE);\n        require(reserves[index] == reserve);\n\n        reserveType[reserve] = ReserveType.NONE;\n        reserves[index] = reserves[reserves.length - 1];\n        reserves.length--;\n\n        RemoveReserveFromNetwork(reserve);\n\n        return true;\n    }\n\n    event ListReservePairs(address indexed reserve, ERC20 src, ERC20 dest, bool add);\n\n    /// @notice can be called only by operator\n    /// @dev allow or prevent a specific reserve to trade a pair of tokens\n    /// @param reserve The reserve address.\n    /// @param token token address\n    /// @param ethToToken will it support ether to token trade\n    /// @param tokenToEth will it support token to ether trade\n    /// @param add If true then list this pair, otherwise unlist it.\n    function listPairForReserve(address reserve, ERC20 token, bool ethToToken, bool tokenToEth, bool add)\n        public\n        onlyOperator\n        returns(bool)\n    {\n        require(reserveType[reserve] != ReserveType.NONE);\n\n        if (ethToToken) {\n            listPairs(reserve, token, false, add);\n\n            ListReservePairs(reserve, ETH_TOKEN_ADDRESS, token, add);\n        }\n\n        if (tokenToEth) {\n            listPairs(reserve, token, true, add);\n\n            if (add) {\n                require(token.approve(reserve, 2**255)); // approve infinity\n            } else {\n                require(token.approve(reserve, 0));\n            }\n\n            ListReservePairs(reserve, token, ETH_TOKEN_ADDRESS, add);\n        }\n\n        setDecimals(token);\n\n        return true;\n    }\n\n    event WhiteListContractSet(WhiteListInterface newContract, WhiteListInterface currentContract);\n\n    ///@param whiteList can be empty\n    function setWhiteList(WhiteListInterface whiteList) public onlyAdmin {\n        WhiteListContractSet(whiteList, whiteListContract);\n        whiteListContract = whiteList;\n    }\n\n    event ExpectedRateContractSet(ExpectedRateInterface newContract, ExpectedRateInterface currentContract);\n\n    function setExpectedRate(ExpectedRateInterface expectedRate) public onlyAdmin {\n        require(expectedRate != address(0));\n\n        ExpectedRateContractSet(expectedRate, expectedRateContract);\n        expectedRateContract = expectedRate;\n    }\n\n    event FeeBurnerContractSet(FeeBurnerInterface newContract, FeeBurnerInterface currentContract);\n\n    function setFeeBurner(FeeBurnerInterface feeBurner) public onlyAdmin {\n        require(feeBurner != address(0));\n\n        FeeBurnerContractSet(feeBurner, feeBurnerContract);\n        feeBurnerContract = feeBurner;\n    }\n\n    event KyberNetwrokParamsSet(uint maxGasPrice, uint negligibleRateDiff);\n\n    function setParams(\n        uint                  _maxGasPrice,\n        uint                  _negligibleRateDiff\n    )\n        public\n        onlyAdmin\n    {\n        require(_negligibleRateDiff \u003c= 100 * 100); // at most 100%\n\n        maxGasPriceValue = _maxGasPrice;\n        negligibleRateDiff = _negligibleRateDiff;\n        KyberNetwrokParamsSet(maxGasPriceValue, negligibleRateDiff);\n    }\n\n    event KyberNetworkSetEnable(bool isEnabled);\n\n    function setEnable(bool _enable) public onlyAdmin {\n        if (_enable) {\n            require(feeBurnerContract != address(0));\n            require(expectedRateContract != address(0));\n            require(kyberNetworkProxyContract != address(0));\n        }\n        isEnabled = _enable;\n\n        KyberNetworkSetEnable(isEnabled);\n    }\n\n    function setInfo(bytes32 field, uint value) public onlyOperator {\n        infoFields[field] = value;\n    }\n\n    event KyberProxySet(address proxy, address sender);\n\n    function setKyberProxy(address networkProxy) public onlyAdmin {\n        require(networkProxy != address(0));\n        kyberNetworkProxyContract = networkProxy;\n        KyberProxySet(kyberNetworkProxyContract, msg.sender);\n    }\n\n    /// @dev returns number of reserves\n    /// @return number of reserves\n    function getNumReserves() public view returns(uint) {\n        return reserves.length;\n    }\n\n    /// @notice should be called off chain\n    /// @dev get an array of all reserves\n    /// @return An array of all reserves\n    function getReserves() public view returns(KyberReserveInterface[]) {\n        return reserves;\n    }\n\n    function maxGasPrice() public view returns(uint) {\n        return maxGasPriceValue;\n    }\n\n    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty)\n        public view\n        returns(uint expectedRate, uint slippageRate)\n    {\n        require(expectedRateContract != address(0));\n        if (src == dest) return (0,0);\n        bool includePermissionless = true;\n\n        if (srcQty \u0026 PERM_HINT_GET_RATE \u003e 0) {\n            includePermissionless = false;\n            srcQty = srcQty \u0026 ~PERM_HINT_GET_RATE;\n        }\n\n        return expectedRateContract.getExpectedRate(src, dest, srcQty, includePermissionless);\n    }\n\n    function getExpectedRateOnlyPermission(ERC20 src, ERC20 dest, uint srcQty)\n        public view\n        returns(uint expectedRate, uint slippageRate)\n    {\n        require(expectedRateContract != address(0));\n        if (src == dest) return (0,0);\n        return expectedRateContract.getExpectedRate(src, dest, srcQty, false);\n    }\n\n    function getUserCapInWei(address user) public view returns(uint) {\n        if (whiteListContract == address(0)) return (2 ** 255);\n        return whiteListContract.getUserCapInWei(user);\n    }\n\n    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint) {\n        //future feature\n        user;\n        token;\n        require(false);\n    }\n\n    struct BestRateResult {\n        uint rate;\n        address reserve1;\n        address reserve2;\n        uint weiAmount;\n        uint rateSrcToEth;\n        uint rateEthToDest;\n        uint destAmount;\n    }\n\n    /// @notice use token address ETH_TOKEN_ADDRESS for ether\n    /// @dev best conversion rate for a pair of tokens, if number of reserves have small differences. randomize\n    /// @param src Src token\n    /// @param dest Destination token\n    /// @return obsolete - used to return best reserve index. not relevant anymore for this API.\n    function findBestRate(ERC20 src, ERC20 dest, uint srcAmount) public view returns(uint obsolete, uint rate) {\n        BestRateResult memory result = findBestRateTokenToToken(src, dest, srcAmount, EMPTY_HINT);\n        return(0, result.rate);\n    }\n\n    function findBestRateOnlyPermission(ERC20 src, ERC20 dest, uint srcAmount)\n        public\n        view\n        returns(uint obsolete, uint rate)\n    {\n        BestRateResult memory result = findBestRateTokenToToken(src, dest, srcAmount, PERM_HINT);\n        return(0, result.rate);\n    }\n\n    function enabled() public view returns(bool) {\n        return isEnabled;\n    }\n\n    function info(bytes32 field) public view returns(uint) {\n        return infoFields[field];\n    }\n\n    /* solhint-disable code-complexity */\n    // Regarding complexity. Below code follows the required algorithm for choosing a reserve.\n    //  It has been tested, reviewed and found to be clear enough.\n    //@dev this function always src or dest are ether. can\u0027t do token to token\n    function searchBestRate(ERC20 src, ERC20 dest, uint srcAmount, bool usePermissionless)\n        public\n        view\n        returns(address, uint)\n    {\n        uint bestRate = 0;\n        uint bestReserve = 0;\n        uint numRelevantReserves = 0;\n\n        //return 1 for ether to ether\n        if (src == dest) return (reserves[bestReserve], PRECISION);\n\n        address[] memory reserveArr;\n\n        reserveArr = src == ETH_TOKEN_ADDRESS ? reservesPerTokenDest[dest] : reservesPerTokenSrc[src];\n\n        if (reserveArr.length == 0) return (reserves[bestReserve], bestRate);\n\n        uint[] memory rates = new uint[](reserveArr.length);\n        uint[] memory reserveCandidates = new uint[](reserveArr.length);\n\n        for (uint i = 0; i \u003c reserveArr.length; i++) {\n            //list all reserves that have this token.\n            if (!usePermissionless \u0026\u0026 reserveType[reserveArr[i]] == ReserveType.PERMISSIONLESS) {\n                continue;\n            }\n\n            rates[i] = (KyberReserveInterface(reserveArr[i])).getConversionRate(src, dest, srcAmount, block.number);\n\n            if (rates[i] \u003e bestRate) {\n                //best rate is highest rate\n                bestRate = rates[i];\n            }\n        }\n\n        if (bestRate \u003e 0) {\n            uint smallestRelevantRate = (bestRate * 10000) / (10000 + negligibleRateDiff);\n\n            for (i = 0; i \u003c reserveArr.length; i++) {\n                if (rates[i] \u003e= smallestRelevantRate) {\n                    reserveCandidates[numRelevantReserves++] = i;\n                }\n            }\n\n            if (numRelevantReserves \u003e 1) {\n                //when encountering small rate diff from bestRate. draw from relevant reserves\n                bestReserve = reserveCandidates[uint(block.blockhash(block.number-1)) % numRelevantReserves];\n            } else {\n                bestReserve = reserveCandidates[0];\n            }\n\n            bestRate = rates[bestReserve];\n        }\n\n        return (reserveArr[bestReserve], bestRate);\n    }\n    /* solhint-enable code-complexity */\n\n    function getReservesRates(ERC20 token, uint optionalAmount) public view\n        returns(address[] buyReserves, uint[] buyRates, address[] sellReserves, uint[] sellRates)\n    {\n        uint amount = optionalAmount \u003e 0 ? optionalAmount : 1000;\n        ERC20 ETH = ETH_TOKEN_ADDRESS;\n\n        buyReserves = reservesPerTokenDest[token];\n        buyRates = new uint[](buyReserves.length);\n\n        for (uint i = 0; i \u003c buyReserves.length; i++) {\n            buyRates[i] = (KyberReserveInterface(buyReserves[i])).getConversionRate(ETH, token, amount, block.number);\n        }\n\n        sellReserves = reservesPerTokenSrc[token];\n        sellRates = new uint[](sellReserves.length);\n\n        for (i = 0; i \u003c sellReserves.length; i++) {\n            sellRates[i] = (KyberReserveInterface(sellReserves[i])).getConversionRate(token, ETH, amount, block.number);\n        }\n    }\n\n    function findBestRateTokenToToken(ERC20 src, ERC20 dest, uint srcAmount, bytes hint) internal view\n        returns(BestRateResult result)\n    {\n        //by default we use permission less reserves\n        bool usePermissionless = true;\n\n        // if hint in first 4 bytes == \u0027PERM\u0027 only permissioned reserves will be used.\n        if ((hint.length \u003e= 4) \u0026\u0026 (keccak256(hint[0], hint[1], hint[2], hint[3]) == keccak256(PERM_HINT))) {\n            usePermissionless = false;\n        }\n\n        uint srcDecimals = getDecimals(src);\n        uint destDecimals = getDecimals(dest);\n\n        (result.reserve1, result.rateSrcToEth) =\n            searchBestRate(src, ETH_TOKEN_ADDRESS, srcAmount, usePermissionless);\n\n        result.weiAmount = calcDestAmountWithDecimals(srcDecimals, ETH_DECIMALS, srcAmount, result.rateSrcToEth);\n        //if weiAmount is zero, return zero rate to avoid revert in ETH -\u003e token call\n        if (result.weiAmount == 0) {\n            result.rate = 0;\n            return;\n        }\n        \n        (result.reserve2, result.rateEthToDest) =\n            searchBestRate(ETH_TOKEN_ADDRESS, dest, result.weiAmount, usePermissionless);\n\n        result.destAmount = calcDestAmountWithDecimals(ETH_DECIMALS, destDecimals, result.weiAmount, result.rateEthToDest);\n\n        result.rate = calcRateFromQty(srcAmount, result.destAmount, srcDecimals, destDecimals);\n    }\n\n    function listPairs(address reserve, ERC20 token, bool isTokenToEth, bool add) internal {\n        uint i;\n        address[] storage reserveArr = reservesPerTokenDest[token];\n\n        if (isTokenToEth) {\n            reserveArr = reservesPerTokenSrc[token];\n        }\n\n        for (i = 0; i \u003c reserveArr.length; i++) {\n            if (reserve == reserveArr[i]) {\n                if (add) {\n                    break; //already added\n                } else {\n                    //remove\n                    reserveArr[i] = reserveArr[reserveArr.length - 1];\n                    reserveArr.length--;\n                    break;\n                }\n            }\n        }\n\n        if (add \u0026\u0026 i == reserveArr.length) {\n            //if reserve wasn\u0027t found add it\n            reserveArr.push(reserve);\n        }\n    }\n\n    event KyberTrade(address indexed trader, ERC20 src, ERC20 dest, uint srcAmount, uint dstAmount,\n        address destAddress, uint ethWeiValue, address reserve1, address reserve2, bytes hint);\n\n    /* solhint-disable function-max-lines */\n    //  Most of the lines here are functions calls spread over multiple lines. We find this function readable enough\n    /// @notice use token address ETH_TOKEN_ADDRESS for ether\n    /// @dev trade api for kyber network.\n    /// @param tradeInput structure of trade inputs\n    function trade(TradeInput tradeInput) internal returns(uint) {\n        require(isEnabled);\n        require(tx.gasprice \u003c= maxGasPriceValue);\n        require(validateTradeInput(tradeInput.src, tradeInput.srcAmount, tradeInput.dest, tradeInput.destAddress));\n\n        BestRateResult memory rateResult =\n            findBestRateTokenToToken(tradeInput.src, tradeInput.dest, tradeInput.srcAmount, tradeInput.hint);\n\n        require(rateResult.rate \u003e 0);\n        require(rateResult.rate \u003c MAX_RATE);\n        require(rateResult.rate \u003e= tradeInput.minConversionRate);\n\n        uint actualDestAmount;\n        uint weiAmount;\n        uint actualSrcAmount;\n\n        (actualSrcAmount, weiAmount, actualDestAmount) = calcActualAmounts(tradeInput.src,\n            tradeInput.dest,\n            tradeInput.srcAmount,\n            tradeInput.maxDestAmount,\n            rateResult);\n\n        require(getUserCapInWei(tradeInput.trader) \u003e= weiAmount);\n        require(handleChange(tradeInput.src, tradeInput.srcAmount, actualSrcAmount, tradeInput.trader));\n\n        require(doReserveTrade(     //src to ETH\n                tradeInput.src,\n                actualSrcAmount,\n                ETH_TOKEN_ADDRESS,\n                this,\n                weiAmount,\n                KyberReserveInterface(rateResult.reserve1),\n                rateResult.rateSrcToEth,\n                true));\n\n        require(doReserveTrade(     //Eth to dest\n                ETH_TOKEN_ADDRESS,\n                weiAmount,\n                tradeInput.dest,\n                tradeInput.destAddress,\n                actualDestAmount,\n                KyberReserveInterface(rateResult.reserve2),\n                rateResult.rateEthToDest,\n                true));\n\n        if (tradeInput.src != ETH_TOKEN_ADDRESS) //\"fake\" trade. (ether to ether) - don\u0027t burn.\n            require(feeBurnerContract.handleFees(weiAmount, rateResult.reserve1, tradeInput.walletId));\n        if (tradeInput.dest != ETH_TOKEN_ADDRESS) //\"fake\" trade. (ether to ether) - don\u0027t burn.\n            require(feeBurnerContract.handleFees(weiAmount, rateResult.reserve2, tradeInput.walletId));\n\n        KyberTrade({\n            trader: tradeInput.trader,\n            src: tradeInput.src,\n            dest: tradeInput.dest,\n            srcAmount: actualSrcAmount,\n            dstAmount: actualDestAmount,\n            destAddress: tradeInput.destAddress,\n            ethWeiValue: weiAmount,\n            reserve1: (tradeInput.src == ETH_TOKEN_ADDRESS) ? address(0) : rateResult.reserve1,\n            reserve2:  (tradeInput.dest == ETH_TOKEN_ADDRESS) ? address(0) : rateResult.reserve2,\n            hint: tradeInput.hint\n        });\n\n        return actualDestAmount;\n    }\n    /* solhint-enable function-max-lines */\n\n    function calcActualAmounts (ERC20 src, ERC20 dest, uint srcAmount, uint maxDestAmount, BestRateResult rateResult)\n        internal view returns(uint actualSrcAmount, uint weiAmount, uint actualDestAmount)\n    {\n        if (rateResult.destAmount \u003e maxDestAmount) {\n            actualDestAmount = maxDestAmount;\n            weiAmount = calcSrcAmount(ETH_TOKEN_ADDRESS, dest, actualDestAmount, rateResult.rateEthToDest);\n            actualSrcAmount = calcSrcAmount(src, ETH_TOKEN_ADDRESS, weiAmount, rateResult.rateSrcToEth);\n            require(actualSrcAmount \u003c= srcAmount);\n        } else {\n            actualDestAmount = rateResult.destAmount;\n            actualSrcAmount = srcAmount;\n            weiAmount = rateResult.weiAmount;\n        }\n    }\n\n    /// @notice use token address ETH_TOKEN_ADDRESS for ether\n    /// @dev do one trade with a reserve\n    /// @param src Src token\n    /// @param amount amount of src tokens\n    /// @param dest   Destination token\n    /// @param destAddress Address to send tokens to\n    /// @param reserve Reserve to use\n    /// @param validate If true, additional validations are applicable\n    /// @return true if trade is successful\n    function doReserveTrade(\n        ERC20 src,\n        uint amount,\n        ERC20 dest,\n        address destAddress,\n        uint expectedDestAmount,\n        KyberReserveInterface reserve,\n        uint conversionRate,\n        bool validate\n    )\n        internal\n        returns(bool)\n    {\n        uint callValue = 0;\n\n        if (src == dest) {\n            //this is for a \"fake\" trade when both src and dest are ethers.\n            if (destAddress != (address(this)))\n                destAddress.transfer(amount);\n            return true;\n        }\n\n        if (src == ETH_TOKEN_ADDRESS) {\n            callValue = amount;\n        }\n\n        // reserve sends tokens/eth to network. network sends it to destination\n        require(reserve.trade.value(callValue)(src, amount, dest, this, conversionRate, validate));\n\n        if (destAddress != address(this)) {\n            //for token to token dest address is network. and Ether / token already here...\n            if (dest == ETH_TOKEN_ADDRESS) {\n                destAddress.transfer(expectedDestAmount);\n            } else {\n                require(dest.transfer(destAddress, expectedDestAmount));\n            }\n        }\n\n        return true;\n    }\n\n    /// when user sets max dest amount we could have too many source tokens == change. so we send it back to user.\n    function handleChange (ERC20 src, uint srcAmount, uint requiredSrcAmount, address trader) internal returns (bool) {\n\n        if (requiredSrcAmount \u003c srcAmount) {\n            //if there is \"change\" send back to trader\n            if (src == ETH_TOKEN_ADDRESS) {\n                trader.transfer(srcAmount - requiredSrcAmount);\n            } else {\n                require(src.transfer(trader, (srcAmount - requiredSrcAmount)));\n            }\n        }\n\n        return true;\n    }\n\n    /// @notice use token address ETH_TOKEN_ADDRESS for ether\n    /// @dev checks that user sent ether/tokens to contract before trade\n    /// @param src Src token\n    /// @param srcAmount amount of src tokens\n    /// @return true if tradeInput is valid\n    function validateTradeInput(ERC20 src, uint srcAmount, ERC20 dest, address destAddress)\n        internal\n        view\n        returns(bool)\n    {\n        require(srcAmount \u003c= MAX_QTY);\n        require(srcAmount != 0);\n        require(destAddress != address(0));\n        require(src != dest);\n\n        if (src == ETH_TOKEN_ADDRESS) {\n            require(msg.value == srcAmount);\n        } else {\n            require(msg.value == 0);\n            //funds should have been moved to this contract already.\n            require(src.balanceOf(this) \u003e= srcAmount);\n        }\n\n        return true;\n    }\n}\n"},"KyberNetworkInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\n\n\n/// @title Kyber Network interface\ninterface KyberNetworkInterface {\n    function maxGasPrice() public view returns(uint);\n    function getUserCapInWei(address user) public view returns(uint);\n    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint);\n    function enabled() public view returns(bool);\n    function info(bytes32 id) public view returns(uint);\n\n    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view\n        returns (uint expectedRate, uint slippageRate);\n\n    function tradeWithHint(address trader, ERC20 src, uint srcAmount, ERC20 dest, address destAddress,\n        uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint);\n}\n"},"KyberReserveInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\n\n/// @title Kyber Reserve contract\ninterface KyberReserveInterface {\n\n    function trade(\n        ERC20 srcToken,\n        uint srcAmount,\n        ERC20 destToken,\n        address destAddress,\n        uint conversionRate,\n        bool validate\n    )\n        public\n        payable\n        returns(bool);\n\n    function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint);\n}\n"},"PermissionGroups.sol":{"content":"pragma solidity 0.4.18;\n\n\ncontract PermissionGroups {\n\n    address public admin;\n    address public pendingAdmin;\n    mapping(address=\u003ebool) internal operators;\n    mapping(address=\u003ebool) internal alerters;\n    address[] internal operatorsGroup;\n    address[] internal alertersGroup;\n    uint constant internal MAX_GROUP_SIZE = 50;\n\n    function PermissionGroups() public {\n        admin = msg.sender;\n    }\n\n    modifier onlyAdmin() {\n        require(msg.sender == admin);\n        _;\n    }\n\n    modifier onlyOperator() {\n        require(operators[msg.sender]);\n        _;\n    }\n\n    modifier onlyAlerter() {\n        require(alerters[msg.sender]);\n        _;\n    }\n\n    function getOperators () external view returns(address[]) {\n        return operatorsGroup;\n    }\n\n    function getAlerters () external view returns(address[]) {\n        return alertersGroup;\n    }\n\n    event TransferAdminPending(address pendingAdmin);\n\n    /**\n     * @dev Allows the current admin to set the pendingAdmin address.\n     * @param newAdmin The address to transfer ownership to.\n     */\n    function transferAdmin(address newAdmin) public onlyAdmin {\n        require(newAdmin != address(0));\n        TransferAdminPending(pendingAdmin);\n        pendingAdmin = newAdmin;\n    }\n\n    /**\n     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.\n     * @param newAdmin The address to transfer ownership to.\n     */\n    function transferAdminQuickly(address newAdmin) public onlyAdmin {\n        require(newAdmin != address(0));\n        TransferAdminPending(newAdmin);\n        AdminClaimed(newAdmin, admin);\n        admin = newAdmin;\n    }\n\n    event AdminClaimed( address newAdmin, address previousAdmin);\n\n    /**\n     * @dev Allows the pendingAdmin address to finalize the change admin process.\n     */\n    function claimAdmin() public {\n        require(pendingAdmin == msg.sender);\n        AdminClaimed(pendingAdmin, admin);\n        admin = pendingAdmin;\n        pendingAdmin = address(0);\n    }\n\n    event AlerterAdded (address newAlerter, bool isAdd);\n\n    function addAlerter(address newAlerter) public onlyAdmin {\n        require(!alerters[newAlerter]); // prevent duplicates.\n        require(alertersGroup.length \u003c MAX_GROUP_SIZE);\n\n        AlerterAdded(newAlerter, true);\n        alerters[newAlerter] = true;\n        alertersGroup.push(newAlerter);\n    }\n\n    function removeAlerter (address alerter) public onlyAdmin {\n        require(alerters[alerter]);\n        alerters[alerter] = false;\n\n        for (uint i = 0; i \u003c alertersGroup.length; ++i) {\n            if (alertersGroup[i] == alerter) {\n                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];\n                alertersGroup.length--;\n                AlerterAdded(alerter, false);\n                break;\n            }\n        }\n    }\n\n    event OperatorAdded(address newOperator, bool isAdd);\n\n    function addOperator(address newOperator) public onlyAdmin {\n        require(!operators[newOperator]); // prevent duplicates.\n        require(operatorsGroup.length \u003c MAX_GROUP_SIZE);\n\n        OperatorAdded(newOperator, true);\n        operators[newOperator] = true;\n        operatorsGroup.push(newOperator);\n    }\n\n    function removeOperator (address operator) public onlyAdmin {\n        require(operators[operator]);\n        operators[operator] = false;\n\n        for (uint i = 0; i \u003c operatorsGroup.length; ++i) {\n            if (operatorsGroup[i] == operator) {\n                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];\n                operatorsGroup.length -= 1;\n                OperatorAdded(operator, false);\n                break;\n            }\n        }\n    }\n}\n"},"Utils.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\n\n\n/// @title Kyber constants contract\ncontract Utils {\n\n    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);\n    uint  constant internal PRECISION = (10**18);\n    uint  constant internal MAX_QTY   = (10**28); // 10B tokens\n    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH\n    uint  constant internal MAX_DECIMALS = 18;\n    uint  constant internal ETH_DECIMALS = 18;\n    mapping(address=\u003euint) internal decimals;\n\n    function setDecimals(ERC20 token) internal {\n        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;\n        else decimals[token] = token.decimals();\n    }\n\n    function getDecimals(ERC20 token) internal view returns(uint) {\n        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access\n        uint tokenDecimals = decimals[token];\n        // technically, there might be token with decimals 0\n        // moreover, very possible that old tokens have decimals 0\n        // these tokens will just have higher gas fees.\n        if(tokenDecimals == 0) return token.decimals();\n\n        return tokenDecimals;\n    }\n\n    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {\n        require(srcQty \u003c= MAX_QTY);\n        require(rate \u003c= MAX_RATE);\n\n        if (dstDecimals \u003e= srcDecimals) {\n            require((dstDecimals - srcDecimals) \u003c= MAX_DECIMALS);\n            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;\n        } else {\n            require((srcDecimals - dstDecimals) \u003c= MAX_DECIMALS);\n            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));\n        }\n    }\n\n    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {\n        require(dstQty \u003c= MAX_QTY);\n        require(rate \u003c= MAX_RATE);\n        \n        //source quantity is rounded up. to avoid dest quantity being too low.\n        uint numerator;\n        uint denominator;\n        if (srcDecimals \u003e= dstDecimals) {\n            require((srcDecimals - dstDecimals) \u003c= MAX_DECIMALS);\n            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));\n            denominator = rate;\n        } else {\n            require((dstDecimals - srcDecimals) \u003c= MAX_DECIMALS);\n            numerator = (PRECISION * dstQty);\n            denominator = (rate * (10**(dstDecimals - srcDecimals)));\n        }\n        return (numerator + denominator - 1) / denominator; //avoid rounding down errors\n    }\n}\n"},"Utils2.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./Utils.sol\";\n\n\ncontract Utils2 is Utils {\n\n    /// @dev get the balance of a user.\n    /// @param token The token type\n    /// @return The balance\n    function getBalance(ERC20 token, address user) public view returns(uint) {\n        if (token == ETH_TOKEN_ADDRESS)\n            return user.balance;\n        else\n            return token.balanceOf(user);\n    }\n\n    function getDecimalsSafe(ERC20 token) internal returns(uint) {\n\n        if (decimals[token] == 0) {\n            setDecimals(token);\n        }\n\n        return decimals[token];\n    }\n\n    function calcDestAmount(ERC20 src, ERC20 dest, uint srcAmount, uint rate) internal view returns(uint) {\n        return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);\n    }\n\n    function calcSrcAmount(ERC20 src, ERC20 dest, uint destAmount, uint rate) internal view returns(uint) {\n        return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);\n    }\n\n    function calcRateFromQty(uint srcAmount, uint destAmount, uint srcDecimals, uint dstDecimals)\n        internal pure returns(uint)\n    {\n        require(srcAmount \u003c= MAX_QTY);\n        require(destAmount \u003c= MAX_QTY);\n\n        if (dstDecimals \u003e= srcDecimals) {\n            require((dstDecimals - srcDecimals) \u003c= MAX_DECIMALS);\n            return (destAmount * PRECISION / ((10 ** (dstDecimals - srcDecimals)) * srcAmount));\n        } else {\n            require((srcDecimals - dstDecimals) \u003c= MAX_DECIMALS);\n            return (destAmount * PRECISION * (10 ** (srcDecimals - dstDecimals)) / srcAmount);\n        }\n    }\n}\n"},"Utils3.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./Utils2.sol\";\n\n\ncontract Utils3 is Utils2 {\n\n    function calcDestAmountWithDecimals(uint srcDecimals, uint destDecimals, uint srcAmount, uint rate) internal pure returns(uint) {\n        return calcDstQty(srcAmount, srcDecimals, destDecimals, rate);\n    }\n\n}\n"},"WhiteListInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\ncontract WhiteListInterface {\n    function getUserCapInWei(address user) external view returns (uint userCapWei);\n}\n"},"Withdrawable.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\nimport \"./PermissionGroups.sol\";\n\n\n/**\n * @title Contracts that should be able to recover tokens or ethers\n * @author Ilan Doron\n * @dev This allows to recover any tokens or Ethers received in a contract.\n * This will prevent any accidental loss of tokens.\n */\ncontract Withdrawable is PermissionGroups {\n\n    event TokenWithdraw(ERC20 token, uint amount, address sendTo);\n\n    /**\n     * @dev Withdraw all ERC20 compatible tokens\n     * @param token ERC20 The address of the token contract\n     */\n    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {\n        require(token.transfer(sendTo, amount));\n        TokenWithdraw(token, amount, sendTo);\n    }\n\n    event EtherWithdraw(uint amount, address sendTo);\n\n    /**\n     * @dev Withdraw Ethers\n     */\n    function withdrawEther(uint amount, address sendTo) external onlyAdmin {\n        sendTo.transfer(amount);\n        EtherWithdraw(amount, sendTo);\n    }\n}\n"}}

pragma solidity ^0.4.16;

contract SafeMath {
     function safeMul(uint a, uint b) internal returns (uint) {
          uint c = a * b;
          assert(a == 0 || c / a == b);
          return c;
     }

     function safeSub(uint a, uint b) internal returns (uint) {
          assert(b <= a);
          return a - b;
     }

     function safeAdd(uint a, uint b) internal returns (uint) {
          uint c = a + b;
          assert(c>=a && c>=b);
          return c;
     }
}

// Standard token interface (ERC 20)
// https://github.com/ethereum/EIPs/issues/20
contract Token is SafeMath {
     // Functions:
     /// @return total amount of tokens
     function totalSupply() constant returns (uint256 supply);

     /// @param _owner The address from which the balance will be retrieved
     /// @return The balance
     function balanceOf(address _owner) constant returns (uint256 balance);

     /// @notice send `_value` token to `_to` from `msg.sender`
     /// @param _to The address of the recipient
     /// @param _value The amount of token to be transferred
     function transfer(address _to, uint256 _value) returns(bool);

     /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
     /// @param _from The address of the sender
     /// @param _to The address of the recipient
     /// @param _value The amount of token to be transferred
     /// @return Whether the transfer was successful or not
     function transferFrom(address _from, address _to, uint256 _value) returns(bool);

     /// @notice `msg.sender` approves `_addr` to spend `_value` tokens
     /// @param _spender The address of the account able to transfer the tokens
     /// @param _value The amount of wei to be approved for transfer
     /// @return Whether the approval was successful or not
     function approve(address _spender, uint256 _value) returns (bool success);

     /// @param _owner The address of the account owning tokens
     /// @param _spender The address of the account able to transfer the tokens
     /// @return Amount of remaining tokens allowed to spent
     function allowance(address _owner, address _spender) constant returns (uint256 remaining);

     // Events:
     event Transfer(address indexed _from, address indexed _to, uint256 _value);
     event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}

contract StdToken is Token {
     // Fields:
     mapping(address => uint256) balances;
     mapping (address => mapping (address => uint256)) allowed;
     uint public supply = 0;

     // Functions:
     function transfer(address _to, uint256 _value) returns(bool) {
          require(balances[msg.sender] >= _value);
          require(balances[_to] + _value > balances[_to]);

          balances[msg.sender] = safeSub(balances[msg.sender],_value);
          balances[_to] = safeAdd(balances[_to],_value);

          Transfer(msg.sender, _to, _value);
          return true;
     }

     function transferFrom(address _from, address _to, uint256 _value) returns(bool){
          require(balances[_from] >= _value);
          require(allowed[_from][msg.sender] >= _value);
          require(balances[_to] + _value > balances[_to]);

          balances[_to] = safeAdd(balances[_to],_value);
          balances[_from] = safeSub(balances[_from],_value);
          allowed[_from][msg.sender] = safeSub(allowed[_from][msg.sender],_value);

          Transfer(_from, _to, _value);
          return true;
     }

     function totalSupply() constant returns (uint256) {
          return supply;
     }

     function balanceOf(address _owner) constant returns (uint256) {
          return balances[_owner];
     }

     function approve(address _spender, uint256 _value) returns (bool) {
          // To change the approve amount you first have to reduce the addresses`
          //  allowance to zero by calling `approve(_spender, 0)` if it is not
          //  already 0 to mitigate the race condition described here:
          //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
          require((_value == 0) || (allowed[msg.sender][_spender] == 0));

          allowed[msg.sender][_spender] = _value;
          Approval(msg.sender, _spender, _value);

          return true;
     }

     function allowance(address _owner, address _spender) constant returns (uint256) {
          return allowed[_owner][_spender];
     }
}

contract EthLendToken is StdToken
{
/// Fields:
    string public constant name = "EthLend Token";
    string public constant symbol = "LEND";
    uint public constant decimals = 18;

    // this includes DEVELOPERS_BONUS
    uint public constant TOTAL_SUPPLY = 1300000000 * (1 ether / 1 wei);
    uint public constant DEVELOPERS_BONUS = 300000000 * (1 ether / 1 wei);

    uint public constant PRESALE_PRICE = 30000;  // per 1 Ether
    uint public constant PRESALE_MAX_ETH = 2000;
    // 60 mln tokens sold during presale
    uint public constant PRESALE_TOKEN_SUPPLY_LIMIT = PRESALE_PRICE * PRESALE_MAX_ETH * (1 ether / 1 wei);

    uint public constant ICO_PRICE1 = 27500;     // per 1 Ether
    uint public constant ICO_PRICE2 = 26250;     // per 1 Ether
    uint public constant ICO_PRICE3 = 25000;     // per 1 Ether

    // 1bln - this includes presale tokens
    uint public constant TOTAL_SOLD_TOKEN_SUPPLY_LIMIT = 1000000000* (1 ether / 1 wei);

    enum State{
       Init,
       Paused,

       PresaleRunning,
       PresaleFinished,

       ICORunning,
       ICOFinished
    }

    State public currentState = State.Init;
    bool public enableTransfers = false;

    address public teamTokenBonus = 0;

    // Gathered funds can be withdrawn only to escrow's address.
    address public escrow = 0;

    // Token manager has exclusive priveleges to call administrative
    // functions on this contract.
    address public tokenManager = 0;

    uint public presaleSoldTokens = 0;
    uint public icoSoldTokens = 0;
    uint public totalSoldTokens = 0;

/// Modifiers:
    modifier onlyTokenManager()
    {
        require(msg.sender==tokenManager); 
        _; 
    }

    modifier onlyInState(State state)
    {
        require(state==currentState); 
        _; 
    }

/// Events:
    event LogBuy(address indexed owner, uint value);
    event LogBurn(address indexed owner, uint value);

/// Functions:
    /// @dev Constructor
    /// @param _tokenManager Token manager address.
    function EthLendToken(address _tokenManager, address _escrow, address _teamTokenBonus) 
    {
        tokenManager = _tokenManager;
        teamTokenBonus = _teamTokenBonus;
        escrow = _escrow;

        // send team bonus immediately
        uint teamBonus = DEVELOPERS_BONUS;
        balances[_teamTokenBonus] += teamBonus;
        supply+= teamBonus;

        assert(PRESALE_TOKEN_SUPPLY_LIMIT==60000000 * (1 ether / 1 wei));
        assert(TOTAL_SOLD_TOKEN_SUPPLY_LIMIT==1000000000 * (1 ether / 1 wei));
    }

    function buyTokens() public payable
    {
        require(currentState==State.PresaleRunning || currentState==State.ICORunning);

        if(currentState==State.PresaleRunning){
            return buyTokensPresale();
        }else{
            return buyTokensICO();
        }
    }

    function buyTokensPresale() public payable onlyInState(State.PresaleRunning)
    {
        // min - 1 ETH
        require(msg.value >= (1 ether / 1 wei));
        uint newTokens = msg.value * PRESALE_PRICE;

        require(presaleSoldTokens + newTokens <= PRESALE_TOKEN_SUPPLY_LIMIT);

        balances[msg.sender] += newTokens;
        supply+= newTokens;
        presaleSoldTokens+= newTokens;
        totalSoldTokens+= newTokens;

        LogBuy(msg.sender, newTokens);
    }

    function buyTokensICO() public payable onlyInState(State.ICORunning)
    {
        // min - 0.01 ETH
        require(msg.value >= ((1 ether / 1 wei) / 100));
        uint newTokens = msg.value * getPrice();

        require(totalSoldTokens + newTokens <= TOTAL_SOLD_TOKEN_SUPPLY_LIMIT);

        balances[msg.sender] += newTokens;
        supply+= newTokens;
        icoSoldTokens+= newTokens;
        totalSoldTokens+= newTokens;

        LogBuy(msg.sender, newTokens);
    }

    function getPrice()constant returns(uint)
    {
        if(currentState==State.ICORunning){
             if(icoSoldTokens<(200000000 * (1 ether / 1 wei))){
                  return ICO_PRICE1;
             }
             
             if(icoSoldTokens<(300000000 * (1 ether / 1 wei))){
                  return ICO_PRICE2;
             }

             return ICO_PRICE3;
        }else{
             return PRESALE_PRICE;
        }
    }

    function setState(State _nextState) public onlyTokenManager
    {
        //setState() method call shouldn't be entertained after ICOFinished
        require(currentState != State.ICOFinished);
        
        currentState = _nextState;
        // enable/disable transfers
        //enable transfers only after ICOFinished, disable otherwise
        enableTransfers = (currentState==State.ICOFinished);
    }

    function withdrawEther() public onlyTokenManager
    {
        if(this.balance > 0) 
        {
            require(escrow.send(this.balance));
        }
    }

/// Overrides:
    function transfer(address _to, uint256 _value) returns(bool){
        require(enableTransfers);
        return super.transfer(_to,_value);
    }

    function transferFrom(address _from, address _to, uint256 _value) returns(bool){
        require(enableTransfers);
        return super.transferFrom(_from,_to,_value);
    }

    function approve(address _spender, uint256 _value) returns (bool) {
        require(enableTransfers);
        return super.approve(_spender,_value);
    }

/// Setters/getters
    function setTokenManager(address _mgr) public onlyTokenManager
    {
        tokenManager = _mgr;
    }

    // Default fallback function
    function() payable 
    {
        buyTokens();
    }
}

pragma solidity 0.4.18;

contract Utils {

    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);
    uint  constant internal PRECISION = (10**18);
    uint  constant internal MAX_QTY   = (10**28); // 10B tokens
    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH
    uint  constant internal MAX_DECIMALS = 18;
    uint  constant internal ETH_DECIMALS = 18;
    mapping(address=>uint) internal decimals;

    function setDecimals(ERC20 token) internal {
        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;
        else decimals[token] = token.decimals();
    }

    function getDecimals(ERC20 token) internal view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
        uint tokenDecimals = decimals[token];
        // technically, there might be token with decimals 0
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        if(tokenDecimals == 0) return token.decimals();

        return tokenDecimals;
    }

    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(srcQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(dstQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        //source quantity is rounded up. to avoid dest quantity being too low.
        uint numerator;
        uint denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }
}

contract PermissionGroups {

    address public admin;
    address public pendingAdmin;
    mapping(address=>bool) internal operators;
    mapping(address=>bool) internal alerters;
    address[] internal operatorsGroup;
    address[] internal alertersGroup;
    uint constant internal MAX_GROUP_SIZE = 50;

    function PermissionGroups() public {
        admin = msg.sender;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin);
        _;
    }

    modifier onlyOperator() {
        require(operators[msg.sender]);
        _;
    }

    modifier onlyAlerter() {
        require(alerters[msg.sender]);
        _;
    }

    function getOperators () external view returns(address[]) {
        return operatorsGroup;
    }

    function getAlerters () external view returns(address[]) {
        return alertersGroup;
    }

    event TransferAdminPending(address pendingAdmin);

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(pendingAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(newAdmin);
        AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    event AdminClaimed( address newAdmin, address previousAdmin);

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender);
        AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }

    event AlerterAdded (address newAlerter, bool isAdd);

    function addAlerter(address newAlerter) public onlyAdmin {
        require(!alerters[newAlerter]); // prevent duplicates.
        require(alertersGroup.length < MAX_GROUP_SIZE);

        AlerterAdded(newAlerter, true);
        alerters[newAlerter] = true;
        alertersGroup.push(newAlerter);
    }

    function removeAlerter (address alerter) public onlyAdmin {
        require(alerters[alerter]);
        alerters[alerter] = false;

        for (uint i = 0; i < alertersGroup.length; ++i) {
            if (alertersGroup[i] == alerter) {
                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
                alertersGroup.length--;
                AlerterAdded(alerter, false);
                break;
            }
        }
    }

    event OperatorAdded(address newOperator, bool isAdd);

    function addOperator(address newOperator) public onlyAdmin {
        require(!operators[newOperator]); // prevent duplicates.
        require(operatorsGroup.length < MAX_GROUP_SIZE);

        OperatorAdded(newOperator, true);
        operators[newOperator] = true;
        operatorsGroup.push(newOperator);
    }

    function removeOperator (address operator) public onlyAdmin {
        require(operators[operator]);
        operators[operator] = false;

        for (uint i = 0; i < operatorsGroup.length; ++i) {
            if (operatorsGroup[i] == operator) {
                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
                operatorsGroup.length -= 1;
                OperatorAdded(operator, false);
                break;
            }
        }
    }
}

interface ConversionRatesInterface {

    function recordImbalance(
        ERC20 token,
        int buyAmount,
        uint rateUpdateBlock,
        uint currentBlock
    )
        public;

    function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint);
}

interface ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address _owner) public view returns (uint balance);
    function transfer(address _to, uint _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint _value) public returns (bool success);
    function approve(address _spender, uint _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint remaining);
    function decimals() public view returns(uint digits);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

interface KyberReserveInterface {

    function trade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        public
        payable
        returns(bool);

    function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint);
}

interface SanityRatesInterface {
    function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint);
}

contract Withdrawable is PermissionGroups {

    event TokenWithdraw(ERC20 token, uint amount, address sendTo);

    /**
     * @dev Withdraw all ERC20 compatible tokens
     * @param token ERC20 The address of the token contract
     */
    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {
        require(token.transfer(sendTo, amount));
        TokenWithdraw(token, amount, sendTo);
    }

    event EtherWithdraw(uint amount, address sendTo);

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint amount, address sendTo) external onlyAdmin {
        sendTo.transfer(amount);
        EtherWithdraw(amount, sendTo);
    }
}

contract KyberReserve is KyberReserveInterface, Withdrawable, Utils {

    address public kyberNetwork;
    bool public tradeEnabled;
    ConversionRatesInterface public conversionRatesContract;
    SanityRatesInterface public sanityRatesContract;
    mapping(bytes32=>bool) public approvedWithdrawAddresses; // sha3(token,address)=>bool

    function KyberReserve(address _kyberNetwork, ConversionRatesInterface _ratesContract, address _admin) public {
        require(_admin != address(0));
        require(_ratesContract != address(0));
        require(_kyberNetwork != address(0));
        kyberNetwork = _kyberNetwork;
        conversionRatesContract = _ratesContract;
        admin = _admin;
        tradeEnabled = true;
    }

    event DepositToken(ERC20 token, uint amount);

    function() public payable {
        DepositToken(ETH_TOKEN_ADDRESS, msg.value);
    }

    event TradeExecute(
        address indexed origin,
        address src,
        uint srcAmount,
        address destToken,
        uint destAmount,
        address destAddress
    );

    function trade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        public
        payable
        returns(bool)
    {
        require(tradeEnabled);
        require(msg.sender == kyberNetwork);

        require(doTrade(srcToken, srcAmount, destToken, destAddress, conversionRate, validate));

        return true;
    }

    event TradeEnabled(bool enable);

    function enableTrade() public onlyAdmin returns(bool) {
        tradeEnabled = true;
        TradeEnabled(true);

        return true;
    }

    function disableTrade() public onlyAlerter returns(bool) {
        tradeEnabled = false;
        TradeEnabled(false);

        return true;
    }

    event WithdrawAddressApproved(ERC20 token, address addr, bool approve);

    function approveWithdrawAddress(ERC20 token, address addr, bool approve) public onlyAdmin {
        approvedWithdrawAddresses[keccak256(token, addr)] = approve;
        WithdrawAddressApproved(token, addr, approve);

        setDecimals(token);
    }

    event WithdrawFunds(ERC20 token, uint amount, address destination);

    function withdraw(ERC20 token, uint amount, address destination) public onlyOperator returns(bool) {
        require(approvedWithdrawAddresses[keccak256(token, destination)]);

        if (token == ETH_TOKEN_ADDRESS) {
            destination.transfer(amount);
        } else {
            require(token.transfer(destination, amount));
        }

        WithdrawFunds(token, amount, destination);

        return true;
    }

    event SetContractAddresses(address network, address rate, address sanity);

    function setContracts(address _kyberNetwork, ConversionRatesInterface _conversionRates, SanityRatesInterface _sanityRates)
        public
        onlyAdmin
    {
        require(_kyberNetwork != address(0));
        require(_conversionRates != address(0));

        kyberNetwork = _kyberNetwork;
        conversionRatesContract = _conversionRates;
        sanityRatesContract = _sanityRates;

        SetContractAddresses(kyberNetwork, conversionRatesContract, sanityRatesContract);
    }

    ////////////////////////////////////////////////////////////////////////////
    /// status functions ///////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////
    function getBalance(ERC20 token) public view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS)
            return this.balance;
        else
            return token.balanceOf(this);
    }

    function getDestQty(ERC20 src, ERC20 dest, uint srcQty, uint rate) public view returns(uint) {
        uint dstDecimals = getDecimals(dest);
        uint srcDecimals = getDecimals(src);

        return calcDstQty(srcQty, srcDecimals, dstDecimals, rate);
    }

    function getSrcQty(ERC20 src, ERC20 dest, uint dstQty, uint rate) public view returns(uint) {
        uint dstDecimals = getDecimals(dest);
        uint srcDecimals = getDecimals(src);

        return calcSrcQty(dstQty, srcDecimals, dstDecimals, rate);
    }

    function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint) {
        ERC20 token;
        bool  buy;

        if (!tradeEnabled) return 0;

        if (ETH_TOKEN_ADDRESS == src) {
            buy = true;
            token = dest;
        } else if (ETH_TOKEN_ADDRESS == dest) {
            buy = false;
            token = src;
        } else {
            return 0; // pair is not listed
        }

        uint rate = conversionRatesContract.getRate(token, blockNumber, buy, srcQty);
        uint destQty = getDestQty(src, dest, srcQty, rate);

        if (getBalance(dest) < destQty) return 0;

        if (sanityRatesContract != address(0)) {
            uint sanityRate = sanityRatesContract.getSanityRate(src, dest);
            if (rate > sanityRate) return 0;
        }

        return rate;
    }

    /// @dev do a trade
    /// @param srcToken Src token
    /// @param srcAmount Amount of src token
    /// @param destToken Destination token
    /// @param destAddress Destination address to send tokens to
    /// @param validate If true, additional validations are applicable
    /// @return true iff trade is successful
    function doTrade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        internal
        returns(bool)
    {
        // can skip validation if done at kyber network level
        if (validate) {
            require(conversionRate > 0);
            if (srcToken == ETH_TOKEN_ADDRESS)
                require(msg.value == srcAmount);
            else
                require(msg.value == 0);
        }

        uint destAmount = getDestQty(srcToken, destToken, srcAmount, conversionRate);
        // sanity check
        require(destAmount > 0);

        // add to imbalance
        ERC20 token;
        int buy;
        if (srcToken == ETH_TOKEN_ADDRESS) {
            buy = int(destAmount);
            token = destToken;
        } else {
            buy = -1 * int(srcAmount);
            token = srcToken;
        }

        conversionRatesContract.recordImbalance(
            token,
            buy,
            0,
            block.number
        );

        // collect src tokens
        if (srcToken != ETH_TOKEN_ADDRESS) {
            require(srcToken.transferFrom(msg.sender, this, srcAmount));
        }

        // send dest tokens
        if (destToken == ETH_TOKEN_ADDRESS) {
            destAddress.transfer(destAmount);
        } else {
            require(destToken.transfer(destAddress, destAmount));
        }

        TradeExecute(msg.sender, srcToken, srcAmount, destToken, destAmount, destAddress);

        return true;
    }
}

pragma solidity 0.4.18;

// File: contracts/ERC20Interface.sol

// https://github.com/ethereum/EIPs/issues/20
interface ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address _owner) public view returns (uint balance);
    function transfer(address _to, uint _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint _value) public returns (bool success);
    function approve(address _spender, uint _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint remaining);
    function decimals() public view returns(uint digits);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

// File: contracts/Utils.sol

/// @title Kyber constants contract
contract Utils {

    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);
    uint  constant internal PRECISION = (10**18);
    uint  constant internal MAX_QTY   = (10**28); // 10B tokens
    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH
    uint  constant internal MAX_DECIMALS = 18;
    uint  constant internal ETH_DECIMALS = 18;
    mapping(address=>uint) internal decimals;

    function setDecimals(ERC20 token) internal {
        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;
        else decimals[token] = token.decimals();
    }

    function getDecimals(ERC20 token) internal view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
        uint tokenDecimals = decimals[token];
        // technically, there might be token with decimals 0
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        if(tokenDecimals == 0) return token.decimals();

        return tokenDecimals;
    }

    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(srcQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(dstQty <= MAX_QTY);
        require(rate <= MAX_RATE);
        
        //source quantity is rounded up. to avoid dest quantity being too low.
        uint numerator;
        uint denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }
}

// File: contracts/PermissionGroups.sol

contract PermissionGroups {

    address public admin;
    address public pendingAdmin;
    mapping(address=>bool) internal operators;
    mapping(address=>bool) internal alerters;
    address[] internal operatorsGroup;
    address[] internal alertersGroup;
    uint constant internal MAX_GROUP_SIZE = 50;

    function PermissionGroups() public {
        admin = msg.sender;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin);
        _;
    }

    modifier onlyOperator() {
        require(operators[msg.sender]);
        _;
    }

    modifier onlyAlerter() {
        require(alerters[msg.sender]);
        _;
    }

    function getOperators () external view returns(address[]) {
        return operatorsGroup;
    }

    function getAlerters () external view returns(address[]) {
        return alertersGroup;
    }

    event TransferAdminPending(address pendingAdmin);

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(pendingAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(newAdmin);
        AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    event AdminClaimed( address newAdmin, address previousAdmin);

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender);
        AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }

    event AlerterAdded (address newAlerter, bool isAdd);

    function addAlerter(address newAlerter) public onlyAdmin {
        require(!alerters[newAlerter]); // prevent duplicates.
        require(alertersGroup.length < MAX_GROUP_SIZE);

        AlerterAdded(newAlerter, true);
        alerters[newAlerter] = true;
        alertersGroup.push(newAlerter);
    }

    function removeAlerter (address alerter) public onlyAdmin {
        require(alerters[alerter]);
        alerters[alerter] = false;

        for (uint i = 0; i < alertersGroup.length; ++i) {
            if (alertersGroup[i] == alerter) {
                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
                alertersGroup.length--;
                AlerterAdded(alerter, false);
                break;
            }
        }
    }

    event OperatorAdded(address newOperator, bool isAdd);

    function addOperator(address newOperator) public onlyAdmin {
        require(!operators[newOperator]); // prevent duplicates.
        require(operatorsGroup.length < MAX_GROUP_SIZE);

        OperatorAdded(newOperator, true);
        operators[newOperator] = true;
        operatorsGroup.push(newOperator);
    }

    function removeOperator (address operator) public onlyAdmin {
        require(operators[operator]);
        operators[operator] = false;

        for (uint i = 0; i < operatorsGroup.length; ++i) {
            if (operatorsGroup[i] == operator) {
                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
                operatorsGroup.length -= 1;
                OperatorAdded(operator, false);
                break;
            }
        }
    }
}

// File: contracts/Withdrawable.sol

/**
 * @title Contracts that should be able to recover tokens or ethers
 * @author Ilan Doron
 * @dev This allows to recover any tokens or Ethers received in a contract.
 * This will prevent any accidental loss of tokens.
 */
contract Withdrawable is PermissionGroups {

    event TokenWithdraw(ERC20 token, uint amount, address sendTo);

    /**
     * @dev Withdraw all ERC20 compatible tokens
     * @param token ERC20 The address of the token contract
     */
    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {
        require(token.transfer(sendTo, amount));
        TokenWithdraw(token, amount, sendTo);
    }

    event EtherWithdraw(uint amount, address sendTo);

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint amount, address sendTo) external onlyAdmin {
        sendTo.transfer(amount);
        EtherWithdraw(amount, sendTo);
    }
}

// File: contracts/ConversionRatesInterface.sol

interface ConversionRatesInterface {

    function recordImbalance(
        ERC20 token,
        int buyAmount,
        uint rateUpdateBlock,
        uint currentBlock
    )
        public;

    function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint);
}

// File: contracts/SanityRatesInterface.sol

interface SanityRatesInterface {
    function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint);
}

// File: contracts/KyberReserveInterface.sol

/// @title Kyber Reserve contract
interface KyberReserveInterface {

    function trade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        public
        payable
        returns(bool);

    function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint);
}

// File: contracts/KyberReserve.sol

/// @title Kyber Reserve contract
contract KyberReserve is KyberReserveInterface, Withdrawable, Utils {

    address public kyberNetwork;
    bool public tradeEnabled;
    ConversionRatesInterface public conversionRatesContract;
    SanityRatesInterface public sanityRatesContract;
    mapping(bytes32=>bool) public approvedWithdrawAddresses; // sha3(token,address)=>bool
    mapping(address=>address) public tokenWallet;

    function KyberReserve(address _kyberNetwork, ConversionRatesInterface _ratesContract, address _admin) public {
        require(_admin != address(0));
        require(_ratesContract != address(0));
        require(_kyberNetwork != address(0));
        kyberNetwork = _kyberNetwork;
        conversionRatesContract = _ratesContract;
        admin = _admin;
        tradeEnabled = true;
    }

    event DepositToken(ERC20 token, uint amount);

    function() public payable {
        DepositToken(ETH_TOKEN_ADDRESS, msg.value);
    }

    event TradeExecute(
        address indexed origin,
        address src,
        uint srcAmount,
        address destToken,
        uint destAmount,
        address destAddress
    );

    function trade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        public
        payable
        returns(bool)
    {
        require(tradeEnabled);
        require(msg.sender == kyberNetwork);

        require(doTrade(srcToken, srcAmount, destToken, destAddress, conversionRate, validate));

        return true;
    }

    event TradeEnabled(bool enable);

    function enableTrade() public onlyAdmin returns(bool) {
        tradeEnabled = true;
        TradeEnabled(true);

        return true;
    }

    function disableTrade() public onlyAlerter returns(bool) {
        tradeEnabled = false;
        TradeEnabled(false);

        return true;
    }

    event WithdrawAddressApproved(ERC20 token, address addr, bool approve);

    function approveWithdrawAddress(ERC20 token, address addr, bool approve) public onlyAdmin {
        approvedWithdrawAddresses[keccak256(token, addr)] = approve;
        WithdrawAddressApproved(token, addr, approve);

        setDecimals(token);
        if ((tokenWallet[token] == address(0x0)) && (token != ETH_TOKEN_ADDRESS)) {
            tokenWallet[token] = this; // by default
            require(token.approve(this, 2 ** 255));
        }
    }

    event NewTokenWallet(ERC20 token, address wallet);

    function setTokenWallet(ERC20 token, address wallet) public onlyAdmin {
        require(wallet != address(0x0));
        tokenWallet[token] = wallet;
        NewTokenWallet(token, wallet);
    }

    event WithdrawFunds(ERC20 token, uint amount, address destination);

    function withdraw(ERC20 token, uint amount, address destination) public onlyOperator returns(bool) {
        require(approvedWithdrawAddresses[keccak256(token, destination)]);

        if (token == ETH_TOKEN_ADDRESS) {
            destination.transfer(amount);
        } else {
            require(token.transferFrom(tokenWallet[token], destination, amount));
        }

        WithdrawFunds(token, amount, destination);

        return true;
    }

    event SetContractAddresses(address network, address rate, address sanity);

    function setContracts(
        address _kyberNetwork,
        ConversionRatesInterface _conversionRates,
        SanityRatesInterface _sanityRates
    )
        public
        onlyAdmin
    {
        require(_kyberNetwork != address(0));
        require(_conversionRates != address(0));

        kyberNetwork = _kyberNetwork;
        conversionRatesContract = _conversionRates;
        sanityRatesContract = _sanityRates;

        SetContractAddresses(kyberNetwork, conversionRatesContract, sanityRatesContract);
    }

    ////////////////////////////////////////////////////////////////////////////
    /// status functions ///////////////////////////////////////////////////////
    ////////////////////////////////////////////////////////////////////////////
    function getBalance(ERC20 token) public view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS)
            return this.balance;
        else {
            address wallet = tokenWallet[token];
            uint balanceOfWallet = token.balanceOf(wallet);
            uint allowanceOfWallet = token.allowance(wallet, this);

            return (balanceOfWallet < allowanceOfWallet) ? balanceOfWallet : allowanceOfWallet;
        }
    }

    function getDestQty(ERC20 src, ERC20 dest, uint srcQty, uint rate) public view returns(uint) {
        uint dstDecimals = getDecimals(dest);
        uint srcDecimals = getDecimals(src);

        return calcDstQty(srcQty, srcDecimals, dstDecimals, rate);
    }

    function getSrcQty(ERC20 src, ERC20 dest, uint dstQty, uint rate) public view returns(uint) {
        uint dstDecimals = getDecimals(dest);
        uint srcDecimals = getDecimals(src);

        return calcSrcQty(dstQty, srcDecimals, dstDecimals, rate);
    }

    function getConversionRate(ERC20 src, ERC20 dest, uint srcQty, uint blockNumber) public view returns(uint) {
        ERC20 token;
        bool  isBuy;

        if (!tradeEnabled) return 0;

        if (ETH_TOKEN_ADDRESS == src) {
            isBuy = true;
            token = dest;
        } else if (ETH_TOKEN_ADDRESS == dest) {
            isBuy = false;
            token = src;
        } else {
            return 0; // pair is not listed
        }

        uint rate = conversionRatesContract.getRate(token, blockNumber, isBuy, srcQty);
        uint destQty = getDestQty(src, dest, srcQty, rate);

        if (getBalance(dest) < destQty) return 0;

        if (sanityRatesContract != address(0)) {
            uint sanityRate = sanityRatesContract.getSanityRate(src, dest);
            if (rate > sanityRate) return 0;
        }

        return rate;
    }

    /// @dev do a trade
    /// @param srcToken Src token
    /// @param srcAmount Amount of src token
    /// @param destToken Destination token
    /// @param destAddress Destination address to send tokens to
    /// @param validate If true, additional validations are applicable
    /// @return true iff trade is successful
    function doTrade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        internal
        returns(bool)
    {
        // can skip validation if done at kyber network level
        if (validate) {
            require(conversionRate > 0);
            if (srcToken == ETH_TOKEN_ADDRESS)
                require(msg.value == srcAmount);
            else
                require(msg.value == 0);
        }

        uint destAmount = getDestQty(srcToken, destToken, srcAmount, conversionRate);
        // sanity check
        require(destAmount > 0);

        // add to imbalance
        ERC20 token;
        int tradeAmount;
        if (srcToken == ETH_TOKEN_ADDRESS) {
            tradeAmount = int(destAmount);
            token = destToken;
        } else {
            tradeAmount = -1 * int(srcAmount);
            token = srcToken;
        }

        conversionRatesContract.recordImbalance(
            token,
            tradeAmount,
            0,
            block.number
        );

        // collect src tokens
        if (srcToken != ETH_TOKEN_ADDRESS) {
            require(srcToken.transferFrom(msg.sender, tokenWallet[srcToken], srcAmount));
        }

        // send dest tokens
        if (destToken == ETH_TOKEN_ADDRESS) {
            destAddress.transfer(destAmount);
        } else {
            require(destToken.transferFrom(tokenWallet[destToken], destAddress, destAmount));
        }

        TradeExecute(msg.sender, srcToken, srcAmount, destToken, destAmount, destAddress);

        return true;
    }
}

pragma solidity ^0.4.13;

library SafeMath {
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

contract Ownable {
  address public owner;


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


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() public {
    owner = msg.sender;
  }


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


  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}

contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256 balance) {
    return balances[_owner];
  }

}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public view returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   *
   * 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
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(address _owner, address _spender) public view returns (uint256) {
    return allowed[_owner][_spender];
  }

  /**
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   */
  function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract BurnableToken is StandardToken {

    event Burn(address indexed burner, uint256 value);

    /**
     * @dev Burns a specific amount of tokens.
     * @param _value The amount of token to be burned.
     */
    function burn(uint256 _value) public {
        require(_value > 0);
        require(_value <= balances[msg.sender]);
        // no need to require value <= totalSupply, since that would imply the
        // sender's balance is greater than the totalSupply, which *should* be an assertion failure

        address burner = msg.sender;
        balances[burner] = balances[burner].sub(_value);
        totalSupply = totalSupply.sub(_value);
        Burn(burner, _value);
    }
}

contract PausableToken is StandardToken, Pausable {

  function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
    return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
    return super.transferFrom(_from, _to, _value);
  }

  function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
    return super.approve(_spender, _value);
  }

  function increaseApproval(address _spender, uint _addedValue) public whenNotPaused returns (bool success) {
    return super.increaseApproval(_spender, _addedValue);
  }

  function decreaseApproval(address _spender, uint _subtractedValue) public whenNotPaused returns (bool success) {
    return super.decreaseApproval(_spender, _subtractedValue);
  }
}

contract RepublicToken is PausableToken, BurnableToken {

    string public constant name = "Republic Token";
    string public constant symbol = "REN";
    uint8 public constant decimals = 18;
    uint256 public constant INITIAL_SUPPLY = 1000000000 * 10**uint256(decimals);
    
    /**
    * @dev RepublicToken Constructor
    */

    function RepublicToken() public {
        totalSupply = INITIAL_SUPPLY;   
        balances[msg.sender] = INITIAL_SUPPLY;
    }

    function transferTokens(address beneficiary, uint256 amount) public onlyOwner returns (bool) {
        require(amount > 0);

        balances[owner] = balances[owner].sub(amount);
        balances[beneficiary] = balances[beneficiary].add(amount);
        Transfer(owner, beneficiary, amount);

        return true;
    }
}

{"ERC20Interface.sol":{"content":"pragma solidity 0.4.18;\n\n\n// https://github.com/ethereum/EIPs/issues/20\ninterface ERC20 {\n    function totalSupply() public view returns (uint supply);\n    function balanceOf(address _owner) public view returns (uint balance);\n    function transfer(address _to, uint _value) public returns (bool success);\n    function transferFrom(address _from, address _to, uint _value) public returns (bool success);\n    function approve(address _spender, uint _value) public returns (bool success);\n    function allowance(address _owner, address _spender) public view returns (uint remaining);\n    function decimals() public view returns(uint digits);\n    event Approval(address indexed _owner, address indexed _spender, uint _value);\n}\n"},"FeeBurner.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./FeeBurnerInterface.sol\";\nimport \"./Withdrawable.sol\";\nimport \"./Utils3.sol\";\nimport \"./KyberNetworkInterface.sol\";\n\n\ninterface BurnableToken {\n    function transferFrom(address _from, address _to, uint _value) public returns (bool);\n    function burnFrom(address _from, uint256 _value) public returns (bool);\n}\n\n\ncontract FeeBurner is Withdrawable, FeeBurnerInterface, Utils3 {\n\n    mapping(address=\u003euint) public reserveFeesInBps;\n    mapping(address=\u003eaddress) public reserveKNCWallet; //wallet holding knc per reserve. from here burn and send fees.\n    mapping(address=\u003euint) public walletFeesInBps; // wallet that is the source of tx is entitled so some fees.\n    mapping(address=\u003euint) public reserveFeeToBurn;\n    mapping(address=\u003euint) public feePayedPerReserve; // track burned fees and sent wallet fees per reserve.\n    mapping(address=\u003emapping(address=\u003euint)) public reserveFeeToWallet;\n    address public taxWallet;\n    uint public taxFeeBps = 0; // burned fees are taxed. % out of burned fees.\n\n    BurnableToken public knc;\n    KyberNetworkInterface public kyberNetwork;\n    uint public kncPerEthRatePrecision = 600 * PRECISION; //--\u003e 1 ether = 600 knc tokens\n\n    function FeeBurner(\n        address _admin,\n        BurnableToken _kncToken,\n        KyberNetworkInterface _kyberNetwork,\n        uint _initialKncToEthRatePrecision\n    )\n        public\n    {\n        require(_admin != address(0));\n        require(_kncToken != address(0));\n        require(_kyberNetwork != address(0));\n        require(_initialKncToEthRatePrecision != 0);\n\n        kyberNetwork = _kyberNetwork;\n        admin = _admin;\n        knc = _kncToken;\n        kncPerEthRatePrecision = _initialKncToEthRatePrecision;\n    }\n\n    event ReserveDataSet(address reserve, uint feeInBps, address kncWallet);\n\n    function setReserveData(address reserve, uint feesInBps, address kncWallet) public onlyOperator {\n        require(feesInBps \u003c 100); // make sure it is always \u003c 1%\n        require(kncWallet != address(0));\n        reserveFeesInBps[reserve] = feesInBps;\n        reserveKNCWallet[reserve] = kncWallet;\n        ReserveDataSet(reserve, feesInBps, kncWallet);\n    }\n\n    event WalletFeesSet(address wallet, uint feesInBps);\n\n    function setWalletFees(address wallet, uint feesInBps) public onlyAdmin {\n        require(feesInBps \u003c 10000); // under 100%\n        walletFeesInBps[wallet] = feesInBps;\n        WalletFeesSet(wallet, feesInBps);\n    }\n\n    event TaxFeesSet(uint feesInBps);\n\n    function setTaxInBps(uint _taxFeeBps) public onlyAdmin {\n        require(_taxFeeBps \u003c 10000); // under 100%\n        taxFeeBps = _taxFeeBps;\n        TaxFeesSet(_taxFeeBps);\n    }\n\n    event TaxWalletSet(address taxWallet);\n\n    function setTaxWallet(address _taxWallet) public onlyAdmin {\n        require(_taxWallet != address(0));\n        taxWallet = _taxWallet;\n        TaxWalletSet(_taxWallet);\n    }\n\n    event KNCRateSet(uint ethToKncRatePrecision, uint kyberEthKnc, uint kyberKncEth, address updater);\n\n    function setKNCRate() public {\n        //query kyber for knc rate sell and buy\n        uint kyberEthKncRate;\n        uint kyberKncEthRate;\n        (kyberEthKncRate, ) = kyberNetwork.getExpectedRate(ETH_TOKEN_ADDRESS, ERC20(knc), (10 ** 18));\n        (kyberKncEthRate, ) = kyberNetwork.getExpectedRate(ERC20(knc), ETH_TOKEN_ADDRESS, (10 ** 18));\n\n        //check \"reasonable\" spread == diff not too big. rate wasn\u0027t tampered.\n        require(kyberEthKncRate * kyberKncEthRate \u003c PRECISION ** 2 * 2);\n        require(kyberEthKncRate * kyberKncEthRate \u003e PRECISION ** 2 / 2);\n\n        require(kyberEthKncRate \u003c= MAX_RATE);\n        kncPerEthRatePrecision = kyberEthKncRate;\n        KNCRateSet(kncPerEthRatePrecision, kyberEthKncRate, kyberKncEthRate, msg.sender);\n    }\n\n    event AssignFeeToWallet(address reserve, address wallet, uint walletFee);\n    event AssignBurnFees(address reserve, uint burnFee);\n\n    function handleFees(uint tradeWeiAmount, address reserve, address wallet) public returns(bool) {\n        require(msg.sender == address(kyberNetwork));\n        require(tradeWeiAmount \u003c= MAX_QTY);\n\n        // MAX_DECIMALS = 18 = KNC_DECIMALS, use this value instead of calling getDecimals() to save gas\n        uint kncAmount = calcDestAmountWithDecimals(ETH_DECIMALS, MAX_DECIMALS, tradeWeiAmount, kncPerEthRatePrecision);\n        uint fee = kncAmount * reserveFeesInBps[reserve] / 10000;\n\n        uint walletFee = fee * walletFeesInBps[wallet] / 10000;\n        require(fee \u003e= walletFee);\n        uint feeToBurn = fee - walletFee;\n\n        if (walletFee \u003e 0) {\n            reserveFeeToWallet[reserve][wallet] += walletFee;\n            AssignFeeToWallet(reserve, wallet, walletFee);\n        }\n\n        if (feeToBurn \u003e 0) {\n            AssignBurnFees(reserve, feeToBurn);\n            reserveFeeToBurn[reserve] += feeToBurn;\n        }\n\n        return true;\n    }\n\n    event BurnAssignedFees(address indexed reserve, address sender, uint quantity);\n\n    event SendTaxFee(address indexed reserve, address sender, address taxWallet, uint quantity);\n\n    // this function is callable by anyone\n    function burnReserveFees(address reserve) public {\n        uint burnAmount = reserveFeeToBurn[reserve];\n        uint taxToSend = 0;\n        require(burnAmount \u003e 2);\n        reserveFeeToBurn[reserve] = 1; // leave 1 twei to avoid spikes in gas fee\n        if (taxWallet != address(0) \u0026\u0026 taxFeeBps != 0) {\n            taxToSend = (burnAmount - 1) * taxFeeBps / 10000;\n            require(burnAmount - 1 \u003e taxToSend);\n            burnAmount -= taxToSend;\n            if (taxToSend \u003e 0) {\n                require(knc.transferFrom(reserveKNCWallet[reserve], taxWallet, taxToSend));\n                SendTaxFee(reserve, msg.sender, taxWallet, taxToSend);\n            }\n        }\n        require(knc.burnFrom(reserveKNCWallet[reserve], burnAmount - 1));\n\n        //update reserve \"payments\" so far\n        feePayedPerReserve[reserve] += (taxToSend + burnAmount - 1);\n\n        BurnAssignedFees(reserve, msg.sender, (burnAmount - 1));\n    }\n\n    event SendWalletFees(address indexed wallet, address reserve, address sender);\n\n    // this function is callable by anyone\n    function sendFeeToWallet(address wallet, address reserve) public {\n        uint feeAmount = reserveFeeToWallet[reserve][wallet];\n        require(feeAmount \u003e 1);\n        reserveFeeToWallet[reserve][wallet] = 1; // leave 1 twei to avoid spikes in gas fee\n        require(knc.transferFrom(reserveKNCWallet[reserve], wallet, feeAmount - 1));\n\n        feePayedPerReserve[reserve] += (feeAmount - 1);\n        SendWalletFees(wallet, reserve, msg.sender);\n    }\n}\n"},"FeeBurnerInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\ninterface FeeBurnerInterface {\n    function handleFees (uint tradeWeiAmount, address reserve, address wallet) public returns(bool);\n    function setReserveData(address reserve, uint feesInBps, address kncWallet) public;\n}\n"},"KyberNetworkInterface.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\n\n\n/// @title Kyber Network interface\ninterface KyberNetworkInterface {\n    function maxGasPrice() public view returns(uint);\n    function getUserCapInWei(address user) public view returns(uint);\n    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint);\n    function enabled() public view returns(bool);\n    function info(bytes32 id) public view returns(uint);\n\n    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view\n        returns (uint expectedRate, uint slippageRate);\n\n    function tradeWithHint(address trader, ERC20 src, uint srcAmount, ERC20 dest, address destAddress,\n        uint maxDestAmount, uint minConversionRate, address walletId, bytes hint) public payable returns(uint);\n}\n"},"PermissionGroups.sol":{"content":"pragma solidity 0.4.18;\n\n\ncontract PermissionGroups {\n\n    address public admin;\n    address public pendingAdmin;\n    mapping(address=\u003ebool) internal operators;\n    mapping(address=\u003ebool) internal alerters;\n    address[] internal operatorsGroup;\n    address[] internal alertersGroup;\n    uint constant internal MAX_GROUP_SIZE = 50;\n\n    function PermissionGroups() public {\n        admin = msg.sender;\n    }\n\n    modifier onlyAdmin() {\n        require(msg.sender == admin);\n        _;\n    }\n\n    modifier onlyOperator() {\n        require(operators[msg.sender]);\n        _;\n    }\n\n    modifier onlyAlerter() {\n        require(alerters[msg.sender]);\n        _;\n    }\n\n    function getOperators () external view returns(address[]) {\n        return operatorsGroup;\n    }\n\n    function getAlerters () external view returns(address[]) {\n        return alertersGroup;\n    }\n\n    event TransferAdminPending(address pendingAdmin);\n\n    /**\n     * @dev Allows the current admin to set the pendingAdmin address.\n     * @param newAdmin The address to transfer ownership to.\n     */\n    function transferAdmin(address newAdmin) public onlyAdmin {\n        require(newAdmin != address(0));\n        TransferAdminPending(pendingAdmin);\n        pendingAdmin = newAdmin;\n    }\n\n    /**\n     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.\n     * @param newAdmin The address to transfer ownership to.\n     */\n    function transferAdminQuickly(address newAdmin) public onlyAdmin {\n        require(newAdmin != address(0));\n        TransferAdminPending(newAdmin);\n        AdminClaimed(newAdmin, admin);\n        admin = newAdmin;\n    }\n\n    event AdminClaimed( address newAdmin, address previousAdmin);\n\n    /**\n     * @dev Allows the pendingAdmin address to finalize the change admin process.\n     */\n    function claimAdmin() public {\n        require(pendingAdmin == msg.sender);\n        AdminClaimed(pendingAdmin, admin);\n        admin = pendingAdmin;\n        pendingAdmin = address(0);\n    }\n\n    event AlerterAdded (address newAlerter, bool isAdd);\n\n    function addAlerter(address newAlerter) public onlyAdmin {\n        require(!alerters[newAlerter]); // prevent duplicates.\n        require(alertersGroup.length \u003c MAX_GROUP_SIZE);\n\n        AlerterAdded(newAlerter, true);\n        alerters[newAlerter] = true;\n        alertersGroup.push(newAlerter);\n    }\n\n    function removeAlerter (address alerter) public onlyAdmin {\n        require(alerters[alerter]);\n        alerters[alerter] = false;\n\n        for (uint i = 0; i \u003c alertersGroup.length; ++i) {\n            if (alertersGroup[i] == alerter) {\n                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];\n                alertersGroup.length--;\n                AlerterAdded(alerter, false);\n                break;\n            }\n        }\n    }\n\n    event OperatorAdded(address newOperator, bool isAdd);\n\n    function addOperator(address newOperator) public onlyAdmin {\n        require(!operators[newOperator]); // prevent duplicates.\n        require(operatorsGroup.length \u003c MAX_GROUP_SIZE);\n\n        OperatorAdded(newOperator, true);\n        operators[newOperator] = true;\n        operatorsGroup.push(newOperator);\n    }\n\n    function removeOperator (address operator) public onlyAdmin {\n        require(operators[operator]);\n        operators[operator] = false;\n\n        for (uint i = 0; i \u003c operatorsGroup.length; ++i) {\n            if (operatorsGroup[i] == operator) {\n                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];\n                operatorsGroup.length -= 1;\n                OperatorAdded(operator, false);\n                break;\n            }\n        }\n    }\n}\n"},"Utils.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\n\n\n/// @title Kyber constants contract\ncontract Utils {\n\n    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);\n    uint  constant internal PRECISION = (10**18);\n    uint  constant internal MAX_QTY   = (10**28); // 10B tokens\n    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH\n    uint  constant internal MAX_DECIMALS = 18;\n    uint  constant internal ETH_DECIMALS = 18;\n    mapping(address=\u003euint) internal decimals;\n\n    function setDecimals(ERC20 token) internal {\n        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;\n        else decimals[token] = token.decimals();\n    }\n\n    function getDecimals(ERC20 token) internal view returns(uint) {\n        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access\n        uint tokenDecimals = decimals[token];\n        // technically, there might be token with decimals 0\n        // moreover, very possible that old tokens have decimals 0\n        // these tokens will just have higher gas fees.\n        if(tokenDecimals == 0) return token.decimals();\n\n        return tokenDecimals;\n    }\n\n    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {\n        require(srcQty \u003c= MAX_QTY);\n        require(rate \u003c= MAX_RATE);\n\n        if (dstDecimals \u003e= srcDecimals) {\n            require((dstDecimals - srcDecimals) \u003c= MAX_DECIMALS);\n            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;\n        } else {\n            require((srcDecimals - dstDecimals) \u003c= MAX_DECIMALS);\n            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));\n        }\n    }\n\n    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {\n        require(dstQty \u003c= MAX_QTY);\n        require(rate \u003c= MAX_RATE);\n        \n        //source quantity is rounded up. to avoid dest quantity being too low.\n        uint numerator;\n        uint denominator;\n        if (srcDecimals \u003e= dstDecimals) {\n            require((srcDecimals - dstDecimals) \u003c= MAX_DECIMALS);\n            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));\n            denominator = rate;\n        } else {\n            require((dstDecimals - srcDecimals) \u003c= MAX_DECIMALS);\n            numerator = (PRECISION * dstQty);\n            denominator = (rate * (10**(dstDecimals - srcDecimals)));\n        }\n        return (numerator + denominator - 1) / denominator; //avoid rounding down errors\n    }\n}\n"},"Utils2.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./Utils.sol\";\n\n\ncontract Utils2 is Utils {\n\n    /// @dev get the balance of a user.\n    /// @param token The token type\n    /// @return The balance\n    function getBalance(ERC20 token, address user) public view returns(uint) {\n        if (token == ETH_TOKEN_ADDRESS)\n            return user.balance;\n        else\n            return token.balanceOf(user);\n    }\n\n    function getDecimalsSafe(ERC20 token) internal returns(uint) {\n\n        if (decimals[token] == 0) {\n            setDecimals(token);\n        }\n\n        return decimals[token];\n    }\n\n    function calcDestAmount(ERC20 src, ERC20 dest, uint srcAmount, uint rate) internal view returns(uint) {\n        return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);\n    }\n\n    function calcSrcAmount(ERC20 src, ERC20 dest, uint destAmount, uint rate) internal view returns(uint) {\n        return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);\n    }\n\n    function calcRateFromQty(uint srcAmount, uint destAmount, uint srcDecimals, uint dstDecimals)\n        internal pure returns(uint)\n    {\n        require(srcAmount \u003c= MAX_QTY);\n        require(destAmount \u003c= MAX_QTY);\n\n        if (dstDecimals \u003e= srcDecimals) {\n            require((dstDecimals - srcDecimals) \u003c= MAX_DECIMALS);\n            return (destAmount * PRECISION / ((10 ** (dstDecimals - srcDecimals)) * srcAmount));\n        } else {\n            require((srcDecimals - dstDecimals) \u003c= MAX_DECIMALS);\n            return (destAmount * PRECISION * (10 ** (srcDecimals - dstDecimals)) / srcAmount);\n        }\n    }\n}\n"},"Utils3.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./Utils2.sol\";\n\n\ncontract Utils3 is Utils2 {\n\n    function calcDestAmountWithDecimals(uint srcDecimals, uint destDecimals, uint srcAmount, uint rate) internal pure returns(uint) {\n        return calcDstQty(srcAmount, srcDecimals, destDecimals, rate);\n    }\n\n}\n"},"Withdrawable.sol":{"content":"pragma solidity 0.4.18;\n\n\nimport \"./ERC20Interface.sol\";\nimport \"./PermissionGroups.sol\";\n\n\n/**\n * @title Contracts that should be able to recover tokens or ethers\n * @author Ilan Doron\n * @dev This allows to recover any tokens or Ethers received in a contract.\n * This will prevent any accidental loss of tokens.\n */\ncontract Withdrawable is PermissionGroups {\n\n    event TokenWithdraw(ERC20 token, uint amount, address sendTo);\n\n    /**\n     * @dev Withdraw all ERC20 compatible tokens\n     * @param token ERC20 The address of the token contract\n     */\n    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {\n        require(token.transfer(sendTo, amount));\n        TokenWithdraw(token, amount, sendTo);\n    }\n\n    event EtherWithdraw(uint amount, address sendTo);\n\n    /**\n     * @dev Withdraw Ethers\n     */\n    function withdrawEther(uint amount, address sendTo) external onlyAdmin {\n        sendTo.transfer(amount);\n        EtherWithdraw(amount, sendTo);\n    }\n}\n"}}

pragma solidity 0.4.18;

interface ConversionRatesInterface {

    function recordImbalance(
        ERC20 token,
        int buyAmount,
        uint rateUpdateBlock,
        uint currentBlock
    )
        public;

    function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint);
}

interface ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address _owner) public view returns (uint balance);
    function transfer(address _to, uint _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint _value) public returns (bool success);
    function approve(address _spender, uint _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint remaining);
    function decimals() public view returns(uint digits);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

contract PermissionGroups {

    address public admin;
    address public pendingAdmin;
    mapping(address=>bool) internal operators;
    mapping(address=>bool) internal alerters;
    address[] internal operatorsGroup;
    address[] internal alertersGroup;
    uint constant internal MAX_GROUP_SIZE = 50;

    function PermissionGroups() public {
        admin = msg.sender;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin);
        _;
    }

    modifier onlyOperator() {
        require(operators[msg.sender]);
        _;
    }

    modifier onlyAlerter() {
        require(alerters[msg.sender]);
        _;
    }

    function getOperators () external view returns(address[]) {
        return operatorsGroup;
    }

    function getAlerters () external view returns(address[]) {
        return alertersGroup;
    }

    event TransferAdminPending(address pendingAdmin);

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(pendingAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(newAdmin);
        AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    event AdminClaimed( address newAdmin, address previousAdmin);

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender);
        AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }

    event AlerterAdded (address newAlerter, bool isAdd);

    function addAlerter(address newAlerter) public onlyAdmin {
        require(!alerters[newAlerter]); // prevent duplicates.
        require(alertersGroup.length < MAX_GROUP_SIZE);

        AlerterAdded(newAlerter, true);
        alerters[newAlerter] = true;
        alertersGroup.push(newAlerter);
    }

    function removeAlerter (address alerter) public onlyAdmin {
        require(alerters[alerter]);
        alerters[alerter] = false;

        for (uint i = 0; i < alertersGroup.length; ++i) {
            if (alertersGroup[i] == alerter) {
                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
                alertersGroup.length--;
                AlerterAdded(alerter, false);
                break;
            }
        }
    }

    event OperatorAdded(address newOperator, bool isAdd);

    function addOperator(address newOperator) public onlyAdmin {
        require(!operators[newOperator]); // prevent duplicates.
        require(operatorsGroup.length < MAX_GROUP_SIZE);

        OperatorAdded(newOperator, true);
        operators[newOperator] = true;
        operatorsGroup.push(newOperator);
    }

    function removeOperator (address operator) public onlyAdmin {
        require(operators[operator]);
        operators[operator] = false;

        for (uint i = 0; i < operatorsGroup.length; ++i) {
            if (operatorsGroup[i] == operator) {
                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
                operatorsGroup.length -= 1;
                OperatorAdded(operator, false);
                break;
            }
        }
    }
}

contract Withdrawable is PermissionGroups {

    event TokenWithdraw(ERC20 token, uint amount, address sendTo);

    /**
     * @dev Withdraw all ERC20 compatible tokens
     * @param token ERC20 The address of the token contract
     */
    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {
        require(token.transfer(sendTo, amount));
        TokenWithdraw(token, amount, sendTo);
    }

    event EtherWithdraw(uint amount, address sendTo);

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint amount, address sendTo) external onlyAdmin {
        sendTo.transfer(amount);
        EtherWithdraw(amount, sendTo);
    }
}

contract VolumeImbalanceRecorder is Withdrawable {

    uint constant internal SLIDING_WINDOW_SIZE = 5;
    uint constant internal POW_2_64 = 2 ** 64;

    struct TokenControlInfo {
        uint minimalRecordResolution; // can be roughly 1 cent
        uint maxPerBlockImbalance; // in twei resolution
        uint maxTotalImbalance; // max total imbalance (between rate updates)
                            // before halting trade
    }

    mapping(address => TokenControlInfo) internal tokenControlInfo;

    struct TokenImbalanceData {
        int  lastBlockBuyUnitsImbalance;
        uint lastBlock;

        int  totalBuyUnitsImbalance;
        uint lastRateUpdateBlock;
    }

    mapping(address => mapping(uint=>uint)) public tokenImbalanceData;

    function VolumeImbalanceRecorder(address _admin) public {
        require(_admin != address(0));
        admin = _admin;
    }

    function setTokenControlInfo(
        ERC20 token,
        uint minimalRecordResolution,
        uint maxPerBlockImbalance,
        uint maxTotalImbalance
    )
        public
        onlyAdmin
    {
        tokenControlInfo[token] =
            TokenControlInfo(
                minimalRecordResolution,
                maxPerBlockImbalance,
                maxTotalImbalance
            );
    }

    function getTokenControlInfo(ERC20 token) public view returns(uint, uint, uint) {
        return (tokenControlInfo[token].minimalRecordResolution,
                tokenControlInfo[token].maxPerBlockImbalance,
                tokenControlInfo[token].maxTotalImbalance);
    }

    function addImbalance(
        ERC20 token,
        int buyAmount,
        uint rateUpdateBlock,
        uint currentBlock
    )
        internal
    {
        uint currentBlockIndex = currentBlock % SLIDING_WINDOW_SIZE;
        int recordedBuyAmount = int(buyAmount / int(tokenControlInfo[token].minimalRecordResolution));

        int prevImbalance = 0;

        TokenImbalanceData memory currentBlockData =
            decodeTokenImbalanceData(tokenImbalanceData[token][currentBlockIndex]);

        // first scenario - this is not the first tx in the current block
        if (currentBlockData.lastBlock == currentBlock) {
            if (uint(currentBlockData.lastRateUpdateBlock) == rateUpdateBlock) {
                // just increase imbalance
                currentBlockData.lastBlockBuyUnitsImbalance += recordedBuyAmount;
                currentBlockData.totalBuyUnitsImbalance += recordedBuyAmount;
            } else {
                // imbalance was changed in the middle of the block
                prevImbalance = getImbalanceInRange(token, rateUpdateBlock, currentBlock);
                currentBlockData.totalBuyUnitsImbalance = int(prevImbalance) + recordedBuyAmount;
                currentBlockData.lastBlockBuyUnitsImbalance += recordedBuyAmount;
                currentBlockData.lastRateUpdateBlock = uint(rateUpdateBlock);
            }
        } else {
            // first tx in the current block
            int currentBlockImbalance;
            (prevImbalance, currentBlockImbalance) = getImbalanceSinceRateUpdate(token, rateUpdateBlock, currentBlock);

            currentBlockData.lastBlockBuyUnitsImbalance = recordedBuyAmount;
            currentBlockData.lastBlock = uint(currentBlock);
            currentBlockData.lastRateUpdateBlock = uint(rateUpdateBlock);
            currentBlockData.totalBuyUnitsImbalance = int(prevImbalance) + recordedBuyAmount;
        }

        tokenImbalanceData[token][currentBlockIndex] = encodeTokenImbalanceData(currentBlockData);
    }

    function setGarbageToVolumeRecorder(ERC20 token) internal {
        for (uint i = 0; i < SLIDING_WINDOW_SIZE; i++) {
            tokenImbalanceData[token][i] = 0x1;
        }
    }

    function getImbalanceInRange(ERC20 token, uint startBlock, uint endBlock) internal view returns(int buyImbalance) {
        // check the imbalance in the sliding window
        require(startBlock <= endBlock);

        buyImbalance = 0;

        for (uint windowInd = 0; windowInd < SLIDING_WINDOW_SIZE; windowInd++) {
            TokenImbalanceData memory perBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][windowInd]);

            if (perBlockData.lastBlock <= endBlock && perBlockData.lastBlock >= startBlock) {
                buyImbalance += int(perBlockData.lastBlockBuyUnitsImbalance);
            }
        }
    }

    function getImbalanceSinceRateUpdate(ERC20 token, uint rateUpdateBlock, uint currentBlock)
        internal view
        returns(int buyImbalance, int currentBlockImbalance)
    {
        buyImbalance = 0;
        currentBlockImbalance = 0;
        uint latestBlock = 0;
        int imbalanceInRange = 0;
        uint startBlock = rateUpdateBlock;
        uint endBlock = currentBlock;

        for (uint windowInd = 0; windowInd < SLIDING_WINDOW_SIZE; windowInd++) {
            TokenImbalanceData memory perBlockData = decodeTokenImbalanceData(tokenImbalanceData[token][windowInd]);

            if (perBlockData.lastBlock <= endBlock && perBlockData.lastBlock >= startBlock) {
                imbalanceInRange += perBlockData.lastBlockBuyUnitsImbalance;
            }

            if (perBlockData.lastRateUpdateBlock != rateUpdateBlock) continue;
            if (perBlockData.lastBlock < latestBlock) continue;

            latestBlock = perBlockData.lastBlock;
            buyImbalance = perBlockData.totalBuyUnitsImbalance;
            if (uint(perBlockData.lastBlock) == currentBlock) {
                currentBlockImbalance = perBlockData.lastBlockBuyUnitsImbalance;
            }
        }

        if (buyImbalance == 0) {
            buyImbalance = imbalanceInRange;
        }
    }

    function getImbalance(ERC20 token, uint rateUpdateBlock, uint currentBlock)
        internal view
        returns(int totalImbalance, int currentBlockImbalance)
    {

        int resolution = int(tokenControlInfo[token].minimalRecordResolution);

        (totalImbalance, currentBlockImbalance) =
            getImbalanceSinceRateUpdate(
                token,
                rateUpdateBlock,
                currentBlock);

        totalImbalance *= resolution;
        currentBlockImbalance *= resolution;
    }

    function getMaxPerBlockImbalance(ERC20 token) internal view returns(uint) {
        return tokenControlInfo[token].maxPerBlockImbalance;
    }

    function getMaxTotalImbalance(ERC20 token) internal view returns(uint) {
        return tokenControlInfo[token].maxTotalImbalance;
    }

    function encodeTokenImbalanceData(TokenImbalanceData data) internal pure returns(uint) {
        // check for overflows
        require(data.lastBlockBuyUnitsImbalance < int(POW_2_64 / 2));
        require(data.lastBlockBuyUnitsImbalance > int(-1 * int(POW_2_64) / 2));
        require(data.lastBlock < POW_2_64);
        require(data.totalBuyUnitsImbalance < int(POW_2_64 / 2));
        require(data.totalBuyUnitsImbalance > int(-1 * int(POW_2_64) / 2));
        require(data.lastRateUpdateBlock < POW_2_64);

        // do encoding
        uint result = uint(data.lastBlockBuyUnitsImbalance) & (POW_2_64 - 1);
        result |= data.lastBlock * POW_2_64;
        result |= (uint(data.totalBuyUnitsImbalance) & (POW_2_64 - 1)) * POW_2_64 * POW_2_64;
        result |= data.lastRateUpdateBlock * POW_2_64 * POW_2_64 * POW_2_64;

        return result;
    }

    function decodeTokenImbalanceData(uint input) internal pure returns(TokenImbalanceData) {
        TokenImbalanceData memory data;

        data.lastBlockBuyUnitsImbalance = int(int64(input & (POW_2_64 - 1)));
        data.lastBlock = uint(uint64((input / POW_2_64) & (POW_2_64 - 1)));
        data.totalBuyUnitsImbalance = int(int64((input / (POW_2_64 * POW_2_64)) & (POW_2_64 - 1)));
        data.lastRateUpdateBlock = uint(uint64((input / (POW_2_64 * POW_2_64 * POW_2_64))));

        return data;
    }
}

contract Utils {

    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);
    uint  constant internal PRECISION = (10**18);
    uint  constant internal MAX_QTY   = (10**28); // 10B tokens
    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH
    uint  constant internal MAX_DECIMALS = 18;
    uint  constant internal ETH_DECIMALS = 18;
    mapping(address=>uint) internal decimals;

    function setDecimals(ERC20 token) internal {
        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;
        else decimals[token] = token.decimals();
    }

    function getDecimals(ERC20 token) internal view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
        uint tokenDecimals = decimals[token];
        // technically, there might be token with decimals 0
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        if(tokenDecimals == 0) return token.decimals();

        return tokenDecimals;
    }

    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(srcQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(dstQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        //source quantity is rounded up. to avoid dest quantity being too low.
        uint numerator;
        uint denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }
}

contract ConversionRates is ConversionRatesInterface, VolumeImbalanceRecorder, Utils {

    // bps - basic rate steps. one step is 1 / 10000 of the rate.
    struct StepFunction {
        int[] x; // quantity for each step. Quantity of each step includes previous steps.
        int[] y; // rate change per quantity step  in bps.
    }

    struct TokenData {
        bool listed;  // was added to reserve
        bool enabled; // whether trade is enabled

        // position in the compact data
        uint compactDataArrayIndex;
        uint compactDataFieldIndex;

        // rate data. base and changes according to quantity and reserve balance.
        // generally speaking. Sell rate is 1 / buy rate i.e. the buy in the other direction.
        uint baseBuyRate;  // in PRECISION units. see KyberConstants
        uint baseSellRate; // PRECISION units. without (sell / buy) spread it is 1 / baseBuyRate
        StepFunction buyRateQtyStepFunction; // in bps. higher quantity - bigger the rate.
        StepFunction sellRateQtyStepFunction;// in bps. higher the qua
        StepFunction buyRateImbalanceStepFunction; // in BPS. higher reserve imbalance - bigger the rate.
        StepFunction sellRateImbalanceStepFunction;
    }

    /*
    this is the data for tokenRatesCompactData
    but solidity compiler optimizer is sub-optimal, and cannot write this structure in a single storage write
    so we represent it as bytes32 and do the byte tricks ourselves.
    struct TokenRatesCompactData {
        bytes14 buy;  // change buy rate of token from baseBuyRate in 10 bps
        bytes14 sell; // change sell rate of token from baseSellRate in 10 bps

        uint32 blockNumber;
    } */
    uint public validRateDurationInBlocks = 10; // rates are valid for this amount of blocks
    ERC20[] internal listedTokens;
    mapping(address=>TokenData) internal tokenData;
    bytes32[] internal tokenRatesCompactData;
    uint public numTokensInCurrentCompactData = 0;
    address public reserveContract;
    uint constant internal NUM_TOKENS_IN_COMPACT_DATA = 14;
    uint constant internal BYTES_14_OFFSET = (2 ** (8 * NUM_TOKENS_IN_COMPACT_DATA));
    uint constant internal MAX_STEPS_IN_FUNCTION = 10;
    int  constant internal MAX_BPS_ADJUSTMENT = 10 ** 11; // 1B %
    int  constant internal MIN_BPS_ADJUSTMENT = -100 * 100; // cannot go down by more than 100%

    function ConversionRates(address _admin) public VolumeImbalanceRecorder(_admin)
        { } // solhint-disable-line no-empty-blocks

    function addToken(ERC20 token) public onlyAdmin {

        require(!tokenData[token].listed);
        tokenData[token].listed = true;
        listedTokens.push(token);

        if (numTokensInCurrentCompactData == 0) {
            tokenRatesCompactData.length++; // add new structure
        }

        tokenData[token].compactDataArrayIndex = tokenRatesCompactData.length - 1;
        tokenData[token].compactDataFieldIndex = numTokensInCurrentCompactData;

        numTokensInCurrentCompactData = (numTokensInCurrentCompactData + 1) % NUM_TOKENS_IN_COMPACT_DATA;

        setGarbageToVolumeRecorder(token);

        setDecimals(token);
    }

    function setCompactData(bytes14[] buy, bytes14[] sell, uint blockNumber, uint[] indices) public onlyOperator {

        require(buy.length == sell.length);
        require(indices.length == buy.length);
        require(blockNumber <= 0xFFFFFFFF);

        uint bytes14Offset = BYTES_14_OFFSET;

        for (uint i = 0; i < indices.length; i++) {
            require(indices[i] < tokenRatesCompactData.length);
            uint data = uint(buy[i]) | uint(sell[i]) * bytes14Offset | (blockNumber * (bytes14Offset * bytes14Offset));
            tokenRatesCompactData[indices[i]] = bytes32(data);
        }
    }

    function setBaseRate(
        ERC20[] tokens,
        uint[] baseBuy,
        uint[] baseSell,
        bytes14[] buy,
        bytes14[] sell,
        uint blockNumber,
        uint[] indices
    )
        public
        onlyOperator
    {
        require(tokens.length == baseBuy.length);
        require(tokens.length == baseSell.length);
        require(sell.length == buy.length);
        require(sell.length == indices.length);

        for (uint ind = 0; ind < tokens.length; ind++) {
            require(tokenData[tokens[ind]].listed);
            tokenData[tokens[ind]].baseBuyRate = baseBuy[ind];
            tokenData[tokens[ind]].baseSellRate = baseSell[ind];
        }

        setCompactData(buy, sell, blockNumber, indices);
    }

    function setQtyStepFunction(
        ERC20 token,
        int[] xBuy,
        int[] yBuy,
        int[] xSell,
        int[] ySell
    )
        public
        onlyOperator
    {
        require(xBuy.length == yBuy.length);
        require(xSell.length == ySell.length);
        require(xBuy.length <= MAX_STEPS_IN_FUNCTION);
        require(xSell.length <= MAX_STEPS_IN_FUNCTION);
        require(tokenData[token].listed);

        tokenData[token].buyRateQtyStepFunction = StepFunction(xBuy, yBuy);
        tokenData[token].sellRateQtyStepFunction = StepFunction(xSell, ySell);
    }

    function setImbalanceStepFunction(
        ERC20 token,
        int[] xBuy,
        int[] yBuy,
        int[] xSell,
        int[] ySell
    )
        public
        onlyOperator
    {
        require(xBuy.length == yBuy.length);
        require(xSell.length == ySell.length);
        require(xBuy.length <= MAX_STEPS_IN_FUNCTION);
        require(xSell.length <= MAX_STEPS_IN_FUNCTION);
        require(tokenData[token].listed);

        tokenData[token].buyRateImbalanceStepFunction = StepFunction(xBuy, yBuy);
        tokenData[token].sellRateImbalanceStepFunction = StepFunction(xSell, ySell);
    }

    function setValidRateDurationInBlocks(uint duration) public onlyAdmin {
        validRateDurationInBlocks = duration;
    }

    function enableTokenTrade(ERC20 token) public onlyAdmin {
        require(tokenData[token].listed);
        require(tokenControlInfo[token].minimalRecordResolution != 0);
        tokenData[token].enabled = true;
    }

    function disableTokenTrade(ERC20 token) public onlyAlerter {
        require(tokenData[token].listed);
        tokenData[token].enabled = false;
    }

    function setReserveAddress(address reserve) public onlyAdmin {
        reserveContract = reserve;
    }

    function recordImbalance(
        ERC20 token,
        int buyAmount,
        uint rateUpdateBlock,
        uint currentBlock
    )
        public
    {
        require(msg.sender == reserveContract);

        if (rateUpdateBlock == 0) rateUpdateBlock = getRateUpdateBlock(token);

        return addImbalance(token, buyAmount, rateUpdateBlock, currentBlock);
    }

    /* solhint-disable function-max-lines */
    function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint) {
        // check if trade is enabled
        if (!tokenData[token].enabled) return 0;
        if (tokenControlInfo[token].minimalRecordResolution == 0) return 0; // token control info not set

        // get rate update block
        bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex];

        uint updateRateBlock = getLast4Bytes(compactData);
        if (currentBlockNumber >= updateRateBlock + validRateDurationInBlocks) return 0; // rate is expired
        // check imbalance
        int totalImbalance;
        int blockImbalance;
        (totalImbalance, blockImbalance) = getImbalance(token, updateRateBlock, currentBlockNumber);

        // calculate actual rate
        int imbalanceQty;
        int extraBps;
        int8 rateUpdate;
        uint rate;

        if (buy) {
            // start with base rate
            rate = tokenData[token].baseBuyRate;

            // add rate update
            rateUpdate = getRateByteFromCompactData(compactData, token, true);
            extraBps = int(rateUpdate) * 10;
            rate = addBps(rate, extraBps);

            // compute token qty
            qty = getTokenQty(token, rate, qty);
            imbalanceQty = int(qty);
            totalImbalance += imbalanceQty;

            // add qty overhead
            extraBps = executeStepFunction(tokenData[token].buyRateQtyStepFunction, int(qty));
            rate = addBps(rate, extraBps);

            // add imbalance overhead
            extraBps = executeStepFunction(tokenData[token].buyRateImbalanceStepFunction, totalImbalance);
            rate = addBps(rate, extraBps);
        } else {
            // start with base rate
            rate = tokenData[token].baseSellRate;

            // add rate update
            rateUpdate = getRateByteFromCompactData(compactData, token, false);
            extraBps = int(rateUpdate) * 10;
            rate = addBps(rate, extraBps);

            // compute token qty
            imbalanceQty = -1 * int(qty);
            totalImbalance += imbalanceQty;

            // add qty overhead
            extraBps = executeStepFunction(tokenData[token].sellRateQtyStepFunction, int(qty));
            rate = addBps(rate, extraBps);

            // add imbalance overhead
            extraBps = executeStepFunction(tokenData[token].sellRateImbalanceStepFunction, totalImbalance);
            rate = addBps(rate, extraBps);
        }

        if (abs(totalImbalance) >= getMaxTotalImbalance(token)) return 0;
        if (abs(blockImbalance + imbalanceQty) >= getMaxPerBlockImbalance(token)) return 0;

        return rate;
    }
    /* solhint-enable function-max-lines */

    function getBasicRate(ERC20 token, bool buy) public view returns(uint) {
        if (buy)
            return tokenData[token].baseBuyRate;
        else
            return tokenData[token].baseSellRate;
    }

    function getCompactData(ERC20 token) public view returns(uint, uint, byte, byte) {
        require(tokenData[token].listed);

        uint arrayIndex = tokenData[token].compactDataArrayIndex;
        uint fieldOffset = tokenData[token].compactDataFieldIndex;

        return (
            arrayIndex,
            fieldOffset,
            byte(getRateByteFromCompactData(tokenRatesCompactData[arrayIndex], token, true)),
            byte(getRateByteFromCompactData(tokenRatesCompactData[arrayIndex], token, false))
        );
    }

    function getTokenBasicData(ERC20 token) public view returns(bool, bool) {
        return (tokenData[token].listed, tokenData[token].enabled);
    }

    /* solhint-disable code-complexity */
    function getStepFunctionData(ERC20 token, uint command, uint param) public view returns(int) {
        if (command == 0) return int(tokenData[token].buyRateQtyStepFunction.x.length);
        if (command == 1) return tokenData[token].buyRateQtyStepFunction.x[param];
        if (command == 2) return int(tokenData[token].buyRateQtyStepFunction.y.length);
        if (command == 3) return tokenData[token].buyRateQtyStepFunction.y[param];

        if (command == 4) return int(tokenData[token].sellRateQtyStepFunction.x.length);
        if (command == 5) return tokenData[token].sellRateQtyStepFunction.x[param];
        if (command == 6) return int(tokenData[token].sellRateQtyStepFunction.y.length);
        if (command == 7) return tokenData[token].sellRateQtyStepFunction.y[param];

        if (command == 8) return int(tokenData[token].buyRateImbalanceStepFunction.x.length);
        if (command == 9) return tokenData[token].buyRateImbalanceStepFunction.x[param];
        if (command == 10) return int(tokenData[token].buyRateImbalanceStepFunction.y.length);
        if (command == 11) return tokenData[token].buyRateImbalanceStepFunction.y[param];

        if (command == 12) return int(tokenData[token].sellRateImbalanceStepFunction.x.length);
        if (command == 13) return tokenData[token].sellRateImbalanceStepFunction.x[param];
        if (command == 14) return int(tokenData[token].sellRateImbalanceStepFunction.y.length);
        if (command == 15) return tokenData[token].sellRateImbalanceStepFunction.y[param];

        revert();
    }
    /* solhint-enable code-complexity */

    function getRateUpdateBlock(ERC20 token) public view returns(uint) {
        bytes32 compactData = tokenRatesCompactData[tokenData[token].compactDataArrayIndex];
        return getLast4Bytes(compactData);
    }

    function getListedTokens() public view returns(ERC20[]) {
        return listedTokens;
    }

    function getTokenQty(ERC20 token, uint ethQty, uint rate) internal view returns(uint) {
        uint dstDecimals = getDecimals(token);
        uint srcDecimals = ETH_DECIMALS;

        return calcDstQty(ethQty, srcDecimals, dstDecimals, rate);
    }

    function getLast4Bytes(bytes32 b) internal pure returns(uint) {
        // cannot trust compiler with not turning bit operations into EXP opcode
        return uint(b) / (BYTES_14_OFFSET * BYTES_14_OFFSET);
    }

    function getRateByteFromCompactData(bytes32 data, ERC20 token, bool buy) internal view returns(int8) {
        uint fieldOffset = tokenData[token].compactDataFieldIndex;
        uint byteOffset;
        if (buy)
            byteOffset = 32 - NUM_TOKENS_IN_COMPACT_DATA + fieldOffset;
        else
            byteOffset = 4 + fieldOffset;

        return int8(data[byteOffset]);
    }

    function executeStepFunction(StepFunction f, int x) internal pure returns(int) {
        uint len = f.y.length;
        for (uint ind = 0; ind < len; ind++) {
            if (x <= f.x[ind]) return f.y[ind];
        }

        return f.y[len-1];
    }

    function addBps(uint rate, int bps) internal pure returns(uint) {
        require(rate <= MAX_RATE);
        require(bps >= MIN_BPS_ADJUSTMENT);
        require(bps <= MAX_BPS_ADJUSTMENT);

        uint maxBps = 100 * 100;
        return (rate * uint(int(maxBps) + bps)) / maxBps;
    }

    function abs(int x) internal pure returns(uint) {
        if (x < 0)
            return uint(-1 * x);
        else
            return uint(x);
    }
}

pragma solidity 0.4.18;

interface ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address _owner) public view returns (uint balance);
    function transfer(address _to, uint _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint _value) public returns (bool success);
    function approve(address _spender, uint _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint remaining);
    function decimals() public view returns(uint digits);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

contract PermissionGroups {

    address public admin;
    address public pendingAdmin;
    mapping(address=>bool) internal operators;
    mapping(address=>bool) internal alerters;
    address[] internal operatorsGroup;
    address[] internal alertersGroup;
    uint constant internal MAX_GROUP_SIZE = 50;

    function PermissionGroups() public {
        admin = msg.sender;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin);
        _;
    }

    modifier onlyOperator() {
        require(operators[msg.sender]);
        _;
    }

    modifier onlyAlerter() {
        require(alerters[msg.sender]);
        _;
    }

    function getOperators () external view returns(address[]) {
        return operatorsGroup;
    }

    function getAlerters () external view returns(address[]) {
        return alertersGroup;
    }

    event TransferAdminPending(address pendingAdmin);

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(pendingAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(newAdmin);
        AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    event AdminClaimed( address newAdmin, address previousAdmin);

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender);
        AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }

    event AlerterAdded (address newAlerter, bool isAdd);

    function addAlerter(address newAlerter) public onlyAdmin {
        require(!alerters[newAlerter]); // prevent duplicates.
        require(alertersGroup.length < MAX_GROUP_SIZE);

        AlerterAdded(newAlerter, true);
        alerters[newAlerter] = true;
        alertersGroup.push(newAlerter);
    }

    function removeAlerter (address alerter) public onlyAdmin {
        require(alerters[alerter]);
        alerters[alerter] = false;

        for (uint i = 0; i < alertersGroup.length; ++i) {
            if (alertersGroup[i] == alerter) {
                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
                alertersGroup.length--;
                AlerterAdded(alerter, false);
                break;
            }
        }
    }

    event OperatorAdded(address newOperator, bool isAdd);

    function addOperator(address newOperator) public onlyAdmin {
        require(!operators[newOperator]); // prevent duplicates.
        require(operatorsGroup.length < MAX_GROUP_SIZE);

        OperatorAdded(newOperator, true);
        operators[newOperator] = true;
        operatorsGroup.push(newOperator);
    }

    function removeOperator (address operator) public onlyAdmin {
        require(operators[operator]);
        operators[operator] = false;

        for (uint i = 0; i < operatorsGroup.length; ++i) {
            if (operatorsGroup[i] == operator) {
                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
                operatorsGroup.length -= 1;
                OperatorAdded(operator, false);
                break;
            }
        }
    }
}

contract Utils {

    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);
    uint  constant internal PRECISION = (10**18);
    uint  constant internal MAX_QTY   = (10**28); // 10B tokens
    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH
    uint  constant internal MAX_DECIMALS = 18;
    uint  constant internal ETH_DECIMALS = 18;
    mapping(address=>uint) internal decimals;

    function setDecimals(ERC20 token) internal {
        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;
        else decimals[token] = token.decimals();
    }

    function getDecimals(ERC20 token) internal view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
        uint tokenDecimals = decimals[token];
        // technically, there might be token with decimals 0
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        if(tokenDecimals == 0) return token.decimals();

        return tokenDecimals;
    }

    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(srcQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(dstQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        //source quantity is rounded up. to avoid dest quantity being too low.
        uint numerator;
        uint denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }
}

contract Withdrawable is PermissionGroups {

    event TokenWithdraw(ERC20 token, uint amount, address sendTo);

    /**
     * @dev Withdraw all ERC20 compatible tokens
     * @param token ERC20 The address of the token contract
     */
    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {
        require(token.transfer(sendTo, amount));
        TokenWithdraw(token, amount, sendTo);
    }

    event EtherWithdraw(uint amount, address sendTo);

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint amount, address sendTo) external onlyAdmin {
        sendTo.transfer(amount);
        EtherWithdraw(amount, sendTo);
    }
}

interface SanityRatesInterface {
    function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint);
}

contract SanityRates is SanityRatesInterface, Withdrawable, Utils {
    mapping(address=>uint) public tokenRate;
    mapping(address=>uint) public reasonableDiffInBps;

    function SanityRates(address _admin) public {
        require(_admin != address(0));
        admin = _admin;
    }

    function setReasonableDiff(ERC20[] srcs, uint[] diff) public onlyAdmin {
        require(srcs.length == diff.length);
        for (uint i = 0; i < srcs.length; i++) {
            require(diff[i] <= 100 * 100);
            reasonableDiffInBps[srcs[i]] = diff[i];
        }
    }

    function setSanityRates(ERC20[] srcs, uint[] rates) public onlyOperator {
        require(srcs.length == rates.length);

        for (uint i = 0; i < srcs.length; i++) {
            require(rates[i] <= MAX_RATE);
            tokenRate[srcs[i]] = rates[i];
        }
    }

    function getSanityRate(ERC20 src, ERC20 dest) public view returns(uint) {
        if (src != ETH_TOKEN_ADDRESS && dest != ETH_TOKEN_ADDRESS) return 0;

        uint rate;
        address token;
        if (src == ETH_TOKEN_ADDRESS) {
            rate = (PRECISION*PRECISION)/tokenRate[dest];
            token = dest;
        } else {
            rate = tokenRate[src];
            token = src;
        }

        return rate * (10000 + reasonableDiffInBps[token])/10000;
    }
}

pragma solidity 0.4.18;

// File: contracts/ERC20Interface.sol

// https://github.com/ethereum/EIPs/issues/20
interface ERC20 {
    function totalSupply() public view returns (uint supply);
    function balanceOf(address _owner) public view returns (uint balance);
    function transfer(address _to, uint _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint _value) public returns (bool success);
    function approve(address _spender, uint _value) public returns (bool success);
    function allowance(address _owner, address _spender) public view returns (uint remaining);
    function decimals() public view returns(uint digits);
    event Approval(address indexed _owner, address indexed _spender, uint _value);
}

// File: contracts/ConversionRatesInterface.sol

interface ConversionRatesInterface {

    function recordImbalance(
        ERC20 token,
        int buyAmount,
        uint rateUpdateBlock,
        uint currentBlock
    )
        public;

    function getRate(ERC20 token, uint currentBlockNumber, bool buy, uint qty) public view returns(uint);
}

// File: contracts/LiquidityFormula.sol

contract UtilMath {
    uint public constant BIG_NUMBER = (uint(1)<<uint(200));

    function checkMultOverflow(uint x, uint y) public pure returns(bool) {
        if (y == 0) return false;
        return (((x*y) / y) != x);
    }

    function compactFraction(uint p, uint q, uint precision) public pure returns (uint, uint) {
        if (q < precision * precision) return (p, q);
        return compactFraction(p/precision, q/precision, precision);
    }

    /* solhint-disable code-complexity */
    function exp(uint p, uint q, uint precision) public pure returns (uint) {
        uint n = 0;
        uint nFact = 1;
        uint currentP = 1;
        uint currentQ = 1;

        uint sum = 0;
        uint prevSum = 0;

        while (true) {
            if (checkMultOverflow(currentP, precision)) return sum;
            if (checkMultOverflow(currentQ, nFact)) return sum;

            sum += (currentP * precision) / (currentQ * nFact);

            if (sum == prevSum) return sum;
            prevSum = sum;

            n++;

            if (checkMultOverflow(currentP, p)) return sum;
            if (checkMultOverflow(currentQ, q)) return sum;
            if (checkMultOverflow(nFact, n)) return sum;

            currentP *= p;
            currentQ *= q;
            nFact *= n;

            (currentP, currentQ) = compactFraction(currentP, currentQ, precision);
        }
    }
    /* solhint-enable code-complexity */

    function countLeadingZeros(uint p, uint q) public pure returns (uint) {
        uint denomator = (uint(1)<<255);
        for (int i = 255; i >= 0; i--) {
            if ((q*denomator)/denomator != q) {
                // overflow
                denomator = denomator/2;
                continue;
            }
            if (p/(q*denomator) > 0) return uint(i);
            denomator = denomator/2;
        }

        return uint(-1);
    }

    // log2 for a number that it in [1,2)
    function log2ForSmallNumber(uint x, uint numPrecisionBits) public pure returns (uint) {
        uint res = 0;
        uint one = (uint(1)<<numPrecisionBits);
        uint two = 2 * one;
        uint addition = one;

        require((x >= one) && (x <= two));
        require(numPrecisionBits < 125);

        for (uint i = numPrecisionBits; i > 0; i--) {
            x = (x*x) / one;
            addition = addition/2;
            if (x >= two) {
                x = x/2;
                res += addition;
            }
        }

        return res;
    }

    function logBase2 (uint p, uint q, uint numPrecisionBits) public pure returns (uint) {
        uint n = 0;
        uint precision = (uint(1)<<numPrecisionBits);

        if (p > q) {
            n = countLeadingZeros(p, q);
        }

        require(!checkMultOverflow(p, precision));
        require(!checkMultOverflow(n, precision));
        require(!checkMultOverflow(uint(1)<<n, q));

        uint y = p * precision / (q * (uint(1)<<n));
        uint log2Small = log2ForSmallNumber(y, numPrecisionBits);

        require(n*precision <= BIG_NUMBER);
        require(log2Small <= BIG_NUMBER);

        return n * precision + log2Small;
    }

    function ln(uint p, uint q, uint numPrecisionBits) public pure returns (uint) {
        uint ln2Numerator   = 6931471805599453094172;
        uint ln2Denomerator = 10000000000000000000000;

        uint log2x = logBase2(p, q, numPrecisionBits);

        require(!checkMultOverflow(ln2Numerator, log2x));

        return ln2Numerator * log2x / ln2Denomerator;
    }
}


contract LiquidityFormula is UtilMath {
    function pE(uint r, uint pMIn, uint e, uint precision) public pure returns (uint) {
        uint expRE = exp(r*e, precision*precision, precision);
        require(!checkMultOverflow(expRE, pMIn));
        return pMIn*expRE / precision;
    }

    function deltaTFunc(uint r, uint pMIn, uint e, uint deltaE, uint precision) public pure returns (uint) {
        uint pe = pE(r, pMIn, e, precision);
        uint rpe = r * pe;
        uint erdeltaE = exp(r*deltaE, precision*precision, precision);

        require(erdeltaE >= precision);
        require(!checkMultOverflow(erdeltaE - precision, precision));
        require(!checkMultOverflow((erdeltaE - precision)*precision, precision));
        require(!checkMultOverflow((erdeltaE - precision)*precision*precision, precision));
        require(!checkMultOverflow(rpe, erdeltaE));
        require(!checkMultOverflow(r, pe));

        return (erdeltaE - precision) * precision * precision * precision / (rpe*erdeltaE);
    }

    function deltaEFunc(uint r, uint pMIn, uint e, uint deltaT, uint precision, uint numPrecisionBits)
        public pure
        returns (uint)
    {
        uint pe = pE(r, pMIn, e, precision);
        uint rpe = r * pe;
        uint lnPart = ln(precision*precision + rpe*deltaT/precision, precision*precision, numPrecisionBits);

        require(!checkMultOverflow(r, pe));
        require(!checkMultOverflow(precision, precision));
        require(!checkMultOverflow(rpe, deltaT));
        require(!checkMultOverflow(lnPart, precision));

        return lnPart * precision / r;
    }
}

// File: contracts/PermissionGroups.sol

contract PermissionGroups {

    address public admin;
    address public pendingAdmin;
    mapping(address=>bool) internal operators;
    mapping(address=>bool) internal alerters;
    address[] internal operatorsGroup;
    address[] internal alertersGroup;
    uint constant internal MAX_GROUP_SIZE = 50;

    function PermissionGroups() public {
        admin = msg.sender;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin);
        _;
    }

    modifier onlyOperator() {
        require(operators[msg.sender]);
        _;
    }

    modifier onlyAlerter() {
        require(alerters[msg.sender]);
        _;
    }

    function getOperators () external view returns(address[]) {
        return operatorsGroup;
    }

    function getAlerters () external view returns(address[]) {
        return alertersGroup;
    }

    event TransferAdminPending(address pendingAdmin);

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(pendingAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0));
        TransferAdminPending(newAdmin);
        AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    event AdminClaimed( address newAdmin, address previousAdmin);

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender);
        AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }

    event AlerterAdded (address newAlerter, bool isAdd);

    function addAlerter(address newAlerter) public onlyAdmin {
        require(!alerters[newAlerter]); // prevent duplicates.
        require(alertersGroup.length < MAX_GROUP_SIZE);

        AlerterAdded(newAlerter, true);
        alerters[newAlerter] = true;
        alertersGroup.push(newAlerter);
    }

    function removeAlerter (address alerter) public onlyAdmin {
        require(alerters[alerter]);
        alerters[alerter] = false;

        for (uint i = 0; i < alertersGroup.length; ++i) {
            if (alertersGroup[i] == alerter) {
                alertersGroup[i] = alertersGroup[alertersGroup.length - 1];
                alertersGroup.length--;
                AlerterAdded(alerter, false);
                break;
            }
        }
    }

    event OperatorAdded(address newOperator, bool isAdd);

    function addOperator(address newOperator) public onlyAdmin {
        require(!operators[newOperator]); // prevent duplicates.
        require(operatorsGroup.length < MAX_GROUP_SIZE);

        OperatorAdded(newOperator, true);
        operators[newOperator] = true;
        operatorsGroup.push(newOperator);
    }

    function removeOperator (address operator) public onlyAdmin {
        require(operators[operator]);
        operators[operator] = false;

        for (uint i = 0; i < operatorsGroup.length; ++i) {
            if (operatorsGroup[i] == operator) {
                operatorsGroup[i] = operatorsGroup[operatorsGroup.length - 1];
                operatorsGroup.length -= 1;
                OperatorAdded(operator, false);
                break;
            }
        }
    }
}

// File: contracts/Withdrawable.sol

/**
 * @title Contracts that should be able to recover tokens or ethers
 * @author Ilan Doron
 * @dev This allows to recover any tokens or Ethers received in a contract.
 * This will prevent any accidental loss of tokens.
 */
contract Withdrawable is PermissionGroups {

    event TokenWithdraw(ERC20 token, uint amount, address sendTo);

    /**
     * @dev Withdraw all ERC20 compatible tokens
     * @param token ERC20 The address of the token contract
     */
    function withdrawToken(ERC20 token, uint amount, address sendTo) external onlyAdmin {
        require(token.transfer(sendTo, amount));
        TokenWithdraw(token, amount, sendTo);
    }

    event EtherWithdraw(uint amount, address sendTo);

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint amount, address sendTo) external onlyAdmin {
        sendTo.transfer(amount);
        EtherWithdraw(amount, sendTo);
    }
}

// File: contracts/Utils.sol

/// @title Kyber constants contract
contract Utils {

    ERC20 constant internal ETH_TOKEN_ADDRESS = ERC20(0x00eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee);
    uint  constant internal PRECISION = (10**18);
    uint  constant internal MAX_QTY   = (10**28); // 10B tokens
    uint  constant internal MAX_RATE  = (PRECISION * 10**6); // up to 1M tokens per ETH
    uint  constant internal MAX_DECIMALS = 18;
    uint  constant internal ETH_DECIMALS = 18;
    mapping(address=>uint) internal decimals;

    function setDecimals(ERC20 token) internal {
        if (token == ETH_TOKEN_ADDRESS) decimals[token] = ETH_DECIMALS;
        else decimals[token] = token.decimals();
    }

    function getDecimals(ERC20 token) internal view returns(uint) {
        if (token == ETH_TOKEN_ADDRESS) return ETH_DECIMALS; // save storage access
        uint tokenDecimals = decimals[token];
        // technically, there might be token with decimals 0
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        if(tokenDecimals == 0) return token.decimals();

        return tokenDecimals;
    }

    function calcDstQty(uint srcQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(srcQty <= MAX_QTY);
        require(rate <= MAX_RATE);

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(uint dstQty, uint srcDecimals, uint dstDecimals, uint rate) internal pure returns(uint) {
        require(dstQty <= MAX_QTY);
        require(rate <= MAX_RATE);
        
        //source quantity is rounded up. to avoid dest quantity being too low.
        uint numerator;
        uint denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS);
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }
}

// File: contracts/LiquidityConversionRates.sol

contract LiquidityConversionRates is ConversionRatesInterface, LiquidityFormula, Withdrawable, Utils {
    ERC20 public token;
    address public reserveContract;

    uint public numFpBits;
    uint public formulaPrecision;

    uint public rInFp;
    uint public pMinInFp;

    uint public maxEthCapBuyInFp;
    uint public maxEthCapSellInFp;
    uint public maxQtyInFp;

    uint public feeInBps;
    uint public collectedFeesInTwei = 0;

    uint public maxBuyRateInPrecision;
    uint public minBuyRateInPrecision;
    uint public maxSellRateInPrecision;
    uint public minSellRateInPrecision;

    function LiquidityConversionRates(address _admin, ERC20 _token) public {
        transferAdminQuickly(_admin);
        token = _token;
        setDecimals(token);
        require(getDecimals(token) <= MAX_DECIMALS);
    }

    event ReserveAddressSet(address reserve);

    function setReserveAddress(address reserve) public onlyAdmin {
        reserveContract = reserve;
        ReserveAddressSet(reserve);
    }

    event LiquidityParamsSet(
        uint rInFp,
        uint pMinInFp,
        uint numFpBits,
        uint maxCapBuyInFp,
        uint maxEthCapSellInFp,
        uint feeInBps,
        uint formulaPrecision,
        uint maxQtyInFp,
        uint maxBuyRateInPrecision,
        uint minBuyRateInPrecision,
        uint maxSellRateInPrecision,
        uint minSellRateInPrecision
    );

    function setLiquidityParams(
        uint _rInFp,
        uint _pMinInFp,
        uint _numFpBits,
        uint _maxCapBuyInWei,
        uint _maxCapSellInWei,
        uint _feeInBps,
        uint _maxTokenToEthRateInPrecision,
        uint _minTokenToEthRateInPrecision
    ) public onlyAdmin {

        require(_numFpBits < 256);
        require(formulaPrecision <= MAX_QTY);
        require(_feeInBps < 10000);
        require(_minTokenToEthRateInPrecision < _maxTokenToEthRateInPrecision);

        rInFp = _rInFp;
        pMinInFp = _pMinInFp;
        formulaPrecision = uint(1)<<_numFpBits;
        maxQtyInFp = fromWeiToFp(MAX_QTY);
        numFpBits = _numFpBits;
        maxEthCapBuyInFp = fromWeiToFp(_maxCapBuyInWei);
        maxEthCapSellInFp = fromWeiToFp(_maxCapSellInWei);
        feeInBps = _feeInBps;
        maxBuyRateInPrecision = PRECISION * PRECISION / _minTokenToEthRateInPrecision;
        minBuyRateInPrecision = PRECISION * PRECISION / _maxTokenToEthRateInPrecision;
        maxSellRateInPrecision = _maxTokenToEthRateInPrecision;
        minSellRateInPrecision = _minTokenToEthRateInPrecision;

        LiquidityParamsSet(
            rInFp,
            pMinInFp,
            numFpBits,
            maxEthCapBuyInFp,
            maxEthCapSellInFp,
            feeInBps,
            formulaPrecision,
            maxQtyInFp,
            maxBuyRateInPrecision,
            minBuyRateInPrecision,
            maxSellRateInPrecision,
            minSellRateInPrecision
        );
    }

    function recordImbalance(
        ERC20 conversionToken,
        int buyAmountInTwei,
        uint rateUpdateBlock,
        uint currentBlock
    )
        public
    {
        conversionToken;
        rateUpdateBlock;
        currentBlock;

        require(msg.sender == reserveContract);
        if (buyAmountInTwei > 0) {
            // Buy case
            collectedFeesInTwei += calcCollectedFee(abs(buyAmountInTwei));
        } else {
            // Sell case
            collectedFeesInTwei += abs(buyAmountInTwei) * feeInBps / 10000;
        }
    }

    event CollectedFeesReset(uint resetFeesInTwei);

    function resetCollectedFees() public onlyAdmin {
        uint resetFeesInTwei = collectedFeesInTwei;
        collectedFeesInTwei = 0;

        CollectedFeesReset(resetFeesInTwei);
    }

    function getRate(
            ERC20 conversionToken,
            uint currentBlockNumber,
            bool buy,
            uint qtyInSrcWei
    ) public view returns(uint) {

        currentBlockNumber;

        require(qtyInSrcWei <= MAX_QTY);
        uint eInFp = fromWeiToFp(reserveContract.balance);
        uint rateInPrecision = getRateWithE(conversionToken, buy, qtyInSrcWei, eInFp);
        require(rateInPrecision <= MAX_RATE);
        return rateInPrecision;
    }

    function getRateWithE(ERC20 conversionToken, bool buy, uint qtyInSrcWei, uint eInFp) public view returns(uint) {
        uint deltaEInFp;
        uint sellInputTokenQtyInFp;
        uint deltaTInFp;
        uint rateInPrecision;

        require(qtyInSrcWei <= MAX_QTY);
        require(eInFp <= maxQtyInFp);
        if (conversionToken != token) return 0;

        if (buy) {
            // ETH goes in, token goes out
            deltaEInFp = fromWeiToFp(qtyInSrcWei);
            if (deltaEInFp > maxEthCapBuyInFp) return 0;

            if (deltaEInFp == 0) {
                rateInPrecision = buyRateZeroQuantity(eInFp);
            } else {
                rateInPrecision = buyRate(eInFp, deltaEInFp);
            }
        } else {
            sellInputTokenQtyInFp = fromTweiToFp(qtyInSrcWei);
            deltaTInFp = valueAfterReducingFee(sellInputTokenQtyInFp);
            if (deltaTInFp == 0) {
                rateInPrecision = sellRateZeroQuantity(eInFp);
                deltaEInFp = 0;
            } else {
                (rateInPrecision, deltaEInFp) = sellRate(eInFp, sellInputTokenQtyInFp, deltaTInFp);
            }

            if (deltaEInFp > maxEthCapSellInFp) return 0;
        }

        rateInPrecision = rateAfterValidation(rateInPrecision, buy);
        return rateInPrecision;
    }

    function rateAfterValidation(uint rateInPrecision, bool buy) public view returns(uint) {
        uint minAllowRateInPrecision;
        uint maxAllowedRateInPrecision;

        if (buy) {
            minAllowRateInPrecision = minBuyRateInPrecision;
            maxAllowedRateInPrecision = maxBuyRateInPrecision;
        } else {
            minAllowRateInPrecision = minSellRateInPrecision;
            maxAllowedRateInPrecision = maxSellRateInPrecision;
        }

        if ((rateInPrecision > maxAllowedRateInPrecision) || (rateInPrecision < minAllowRateInPrecision)) {
            return 0;
        } else if (rateInPrecision > MAX_RATE) {
            return 0;
        } else {
            return rateInPrecision;
        }
    }

    function buyRate(uint eInFp, uint deltaEInFp) public view returns(uint) {
        uint deltaTInFp = deltaTFunc(rInFp, pMinInFp, eInFp, deltaEInFp, formulaPrecision);
        require(deltaTInFp <= maxQtyInFp);
        deltaTInFp = valueAfterReducingFee(deltaTInFp);
        return deltaTInFp * PRECISION / deltaEInFp;
    }

    function buyRateZeroQuantity(uint eInFp) public view returns(uint) {
        uint ratePreReductionInPrecision = formulaPrecision * PRECISION / pE(rInFp, pMinInFp, eInFp, formulaPrecision);
        return valueAfterReducingFee(ratePreReductionInPrecision);
    }

    function sellRate(
        uint eInFp,
        uint sellInputTokenQtyInFp,
        uint deltaTInFp
    ) public view returns(uint rateInPrecision, uint deltaEInFp) {
        deltaEInFp = deltaEFunc(rInFp, pMinInFp, eInFp, deltaTInFp, formulaPrecision, numFpBits);
        require(deltaEInFp <= maxQtyInFp);
        rateInPrecision = deltaEInFp * PRECISION / sellInputTokenQtyInFp;
    }

    function sellRateZeroQuantity(uint eInFp) public view returns(uint) {
        uint ratePreReductionInPrecision = pE(rInFp, pMinInFp, eInFp, formulaPrecision) * PRECISION / formulaPrecision;
        return valueAfterReducingFee(ratePreReductionInPrecision);
    }

    function fromTweiToFp(uint qtyInTwei) public view returns(uint) {
        require(qtyInTwei <= MAX_QTY);
        return qtyInTwei * formulaPrecision / (10 ** getDecimals(token));
    }

    function fromWeiToFp(uint qtyInwei) public view returns(uint) {
        require(qtyInwei <= MAX_QTY);
        return qtyInwei * formulaPrecision / (10 ** ETH_DECIMALS);
    }

    function valueAfterReducingFee(uint val) public view returns(uint) {
        require(val <= BIG_NUMBER);
        return ((10000 - feeInBps) * val) / 10000;
    }

    function calcCollectedFee(uint val) public view returns(uint) {
        require(val <= MAX_QTY);
        return val * feeInBps / (10000 - feeInBps);
    }

    function abs(int val) public pure returns(uint) {
        if (val < 0) {
            return uint(val * (-1));
        } else {
            return uint(val);
        }
    }

}