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)
            );
    }
}

// Copyright (C) 2015, 2016, 2017 Dapphub

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.4.18;

contract WETH9 {
    string public name     = "Wrapped Ether";
    string public symbol   = "WETH";
    uint8  public decimals = 18;

    event  Approval(address indexed src, address indexed guy, uint wad);
    event  Transfer(address indexed src, address indexed dst, uint wad);
    event  Deposit(address indexed dst, uint wad);
    event  Withdrawal(address indexed src, uint wad);

    mapping (address => uint)                       public  balanceOf;
    mapping (address => mapping (address => uint))  public  allowance;

    function() public payable {
        deposit();
    }
    function deposit() public payable {
        balanceOf[msg.sender] += msg.value;
        Deposit(msg.sender, msg.value);
    }
    function withdraw(uint wad) public {
        require(balanceOf[msg.sender] >= wad);
        balanceOf[msg.sender] -= wad;
        msg.sender.transfer(wad);
        Withdrawal(msg.sender, wad);
    }

    function totalSupply() public view returns (uint) {
        return this.balance;
    }

    function approve(address guy, uint wad) public returns (bool) {
        allowance[msg.sender][guy] = wad;
        Approval(msg.sender, guy, wad);
        return true;
    }

    function transfer(address dst, uint wad) public returns (bool) {
        return transferFrom(msg.sender, dst, wad);
    }

    function transferFrom(address src, address dst, uint wad)
        public
        returns (bool)
    {
        require(balanceOf[src] >= wad);

        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
            require(allowance[src][msg.sender] >= wad);
            allowance[src][msg.sender] -= wad;
        }

        balanceOf[src] -= wad;
        balanceOf[dst] += wad;

        Transfer(src, dst, wad);

        return true;
    }
}


/*
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

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software and other kinds of works.

  The licenses for most software and other practical works are designed
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the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users.  We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors.  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
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  To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights.  Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.

  For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
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  Developers that use the GNU GPL protect your rights with two steps:
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  For the developers' and authors' protection, the GPL clearly explains
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  Some devices are designed to deny users access to install or run
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  The precise terms and conditions for copying, distribution and
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  "This License" refers to version 3 of the GNU General Public License.

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            How to Apply These Terms to Your New Programs

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Also add information on how to contact you by electronic and paper mail.

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The hypothetical commands `show w' and `show c' should show the appropriate
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For more information on this, and how to apply and follow the GNU GPL, see
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  The GNU General Public License does not permit incorporating your program
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Public License instead of this License.  But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

*/

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/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/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/wethContracts/KyberWethReserve.sol

contract WethInterface is ERC20 {
    function deposit() public payable;
    function withdraw(uint) public;
}


contract KyberWethReserve is KyberReserveInterface, Withdrawable, Utils2 {

    uint constant internal COMMON_DECIMALS = 18;
    address public sanityRatesContract = 0;
    address public kyberNetwork;
    WethInterface public wethToken;
    bool public tradeEnabled;

    function KyberWethReserve(address _kyberNetwork, WethInterface _wethToken, address _admin) public {
        require(_admin != address(0));
        require(_kyberNetwork != address(0));
        require(_wethToken != address(0));
        require(getDecimals(_wethToken) == COMMON_DECIMALS);

        kyberNetwork = _kyberNetwork;
        wethToken = _wethToken;
        tradeEnabled = true;
        admin = _admin;
    }

    function() public payable {
        require(msg.sender == address(wethToken));
    }

    event TradeExecute(
        address indexed sender,
        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 KyberNetworkSet(address kyberNetwork);

    function setKyberNetwork(address _kyberNetwork) public onlyAdmin {
        require(_kyberNetwork != address(0));

        kyberNetwork = _kyberNetwork;
        KyberNetworkSet(kyberNetwork);
    }

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

        srcQty;
        blockNumber;

        if (!tradeEnabled) return 0;
        if ((wethToken != src) && (wethToken != dest)) return 0;
        if ((ETH_TOKEN_ADDRESS != src) && (ETH_TOKEN_ADDRESS != dest)) return 0;

        return 1 * PRECISION;
    }

    function doTrade(
        ERC20 srcToken,
        uint srcAmount,
        ERC20 destToken,
        address destAddress,
        uint conversionRate,
        bool validate
    )
        internal
        returns(bool)
    {
        require((ETH_TOKEN_ADDRESS == srcToken) || (ETH_TOKEN_ADDRESS == destToken));
        require((wethToken == srcToken) || (wethToken == destToken));

        // 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 dstAmount = calcDstQty(srcAmount, COMMON_DECIMALS, COMMON_DECIMALS, conversionRate);
        require(dstAmount > 0); // sanity check

        if (srcToken == ETH_TOKEN_ADDRESS) {
            wethToken.deposit.value(srcAmount)();
            require(wethToken.transfer(destAddress, dstAmount));
        } else {
            require(srcToken.transferFrom(msg.sender, this, srcAmount));
            wethToken.withdraw(dstAmount);
            destAddress.transfer(dstAmount); 
        }

        TradeExecute(msg.sender, srcToken, srcAmount, destToken, dstAmount, 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/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/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/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/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/WhiteListInterface.sol

contract WhiteListInterface {
    function getUserCapInWei(address user) external view returns (uint userCapWei);
}

// File: contracts/ExpectedRateInterface.sol

interface ExpectedRateInterface {
    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty, bool usePermissionless) public view
        returns (uint expectedRate, uint slippageRate);
}

// File: contracts/FeeBurnerInterface.sol

interface FeeBurnerInterface {
    function handleFees (uint tradeWeiAmount, address reserve, address wallet) public returns(bool);
    function setReserveData(address reserve, uint feesInBps, address kncWallet) public;
}

// File: contracts/KyberNetwork.sol

/**
 * @title Helps contracts guard against reentrancy attacks.
 */
contract ReentrancyGuard {

    /// @dev counter to allow mutex lock with only one SSTORE operation
    uint256 private guardCounter = 1;

    /**
     * @dev Prevents a function from calling itself, directly or indirectly.
     * Calling one `nonReentrant` function from
     * another is not supported. Instead, you can implement a
     * `private` function doing the actual work, and an `external`
     * wrapper marked as `nonReentrant`.
     */
    modifier nonReentrant() {
        guardCounter += 1;
        uint256 localCounter = guardCounter;
        _;
        require(localCounter == guardCounter);
    }
}


////////////////////////////////////////////////////////////////////////////////////////////////////////
/// @title Kyber Network main contract
contract KyberNetwork is Withdrawable, Utils2, KyberNetworkInterface, ReentrancyGuard {

    bytes public constant PERM_HINT = "PERM";
    uint  public constant PERM_HINT_GET_RATE = 1 << 255; // for get rate. bit mask hint.

    uint public negligibleRateDiff = 10; // basic rate steps will be in 0.01%
    KyberReserveInterface[] public reserves;
    mapping(address=>ReserveType) public reserveType;
    WhiteListInterface public whiteListContract;
    ExpectedRateInterface public expectedRateContract;
    FeeBurnerInterface    public feeBurnerContract;
    address               public kyberNetworkProxyContract;
    uint                  public maxGasPriceValue = 50 * 1000 * 1000 * 1000; // 50 gwei
    bool                  public isEnabled = false; // network is enabled
    mapping(bytes32=>uint) public infoFields; // this is only a UI field for external app.

    mapping(address=>address[]) public reservesPerTokenSrc; //reserves supporting token to eth
    mapping(address=>address[]) public reservesPerTokenDest;//reserves support eth to token

    enum ReserveType {NONE, PERMISSIONED, PERMISSIONLESS}
    bytes internal constant EMPTY_HINT = "";

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

    event EtherReceival(address indexed sender, uint amount);

    /* solhint-disable no-complex-fallback */
    // To avoid users trying to swap tokens using default payable function. We added this short code
    //  to verify Ethers will be received only from reserves if transferred without a specific function call.
    function() public payable {
        require(reserveType[msg.sender] != ReserveType.NONE);
        EtherReceival(msg.sender, msg.value);
    }
    /* solhint-enable no-complex-fallback */

    struct TradeInput {
        address trader;
        ERC20 src;
        uint srcAmount;
        ERC20 dest;
        address destAddress;
        uint maxDestAmount;
        uint minConversionRate;
        address walletId;
        bytes hint;
    }

    function tradeWithHint(
        address trader,
        ERC20 src,
        uint srcAmount,
        ERC20 dest,
        address destAddress,
        uint maxDestAmount,
        uint minConversionRate,
        address walletId,
        bytes hint
    )
        public
        nonReentrant
        payable
        returns(uint)
    {
        require(msg.sender == kyberNetworkProxyContract);
        require((hint.length == 0) || (hint.length == 4));

        TradeInput memory tradeInput;

        tradeInput.trader = trader;
        tradeInput.src = src;
        tradeInput.srcAmount = srcAmount;
        tradeInput.dest = dest;
        tradeInput.destAddress = destAddress;
        tradeInput.maxDestAmount = maxDestAmount;
        tradeInput.minConversionRate = minConversionRate;
        tradeInput.walletId = walletId;
        tradeInput.hint = hint;

        return trade(tradeInput);
    }

    event AddReserveToNetwork(KyberReserveInterface indexed reserve, bool add, bool isPermissionless);

    /// @notice can be called only by operator
    /// @dev add or deletes a reserve to/from the network.
    /// @param reserve The reserve address.
    /// @param isPermissionless is the new reserve from permissionless type.
    function addReserve(KyberReserveInterface reserve, bool isPermissionless) public onlyOperator
        returns(bool)
    {
        require(reserveType[reserve] == ReserveType.NONE);
        reserves.push(reserve);

        reserveType[reserve] = isPermissionless ? ReserveType.PERMISSIONLESS : ReserveType.PERMISSIONED;

        AddReserveToNetwork(reserve, true, isPermissionless);

        return true;
    }

    event RemoveReserveFromNetwork(KyberReserveInterface reserve);

    /// @notice can be called only by operator
    /// @dev removes a reserve from Kyber network.
    /// @param reserve The reserve address.
    /// @param index in reserve array.
    function removeReserve(KyberReserveInterface reserve, uint index) public onlyOperator
        returns(bool)
    {

        require(reserveType[reserve] != ReserveType.NONE);
        require(reserves[index] == reserve);

        reserveType[reserve] = ReserveType.NONE;
        reserves[index] = reserves[reserves.length - 1];
        reserves.length--;

        RemoveReserveFromNetwork(reserve);

        return true;
    }

    event ListReservePairs(address indexed reserve, ERC20 src, ERC20 dest, bool add);

    /// @notice can be called only by operator
    /// @dev allow or prevent a specific reserve to trade a pair of tokens
    /// @param reserve The reserve address.
    /// @param token token address
    /// @param ethToToken will it support ether to token trade
    /// @param tokenToEth will it support token to ether trade
    /// @param add If true then list this pair, otherwise unlist it.
    function listPairForReserve(address reserve, ERC20 token, bool ethToToken, bool tokenToEth, bool add)
        public
        onlyOperator
        returns(bool)
    {
        require(reserveType[reserve] != ReserveType.NONE);

        if (ethToToken) {
            listPairs(reserve, token, false, add);

            ListReservePairs(reserve, ETH_TOKEN_ADDRESS, token, add);
        }

        if (tokenToEth) {
            listPairs(reserve, token, true, add);

            if (add) {
                require(token.approve(reserve, 2**255)); // approve infinity
            } else {
                require(token.approve(reserve, 0));
            }

            ListReservePairs(reserve, token, ETH_TOKEN_ADDRESS, add);
        }

        setDecimals(token);

        return true;
    }

    event WhiteListContractSet(WhiteListInterface newContract, WhiteListInterface currentContract);

    ///@param whiteList can be empty
    function setWhiteList(WhiteListInterface whiteList) public onlyAdmin {
        WhiteListContractSet(whiteList, whiteListContract);
        whiteListContract = whiteList;
    }

    event ExpectedRateContractSet(ExpectedRateInterface newContract, ExpectedRateInterface currentContract);

    function setExpectedRate(ExpectedRateInterface expectedRate) public onlyAdmin {
        require(expectedRate != address(0));

        ExpectedRateContractSet(expectedRate, expectedRateContract);
        expectedRateContract = expectedRate;
    }

    event FeeBurnerContractSet(FeeBurnerInterface newContract, FeeBurnerInterface currentContract);

    function setFeeBurner(FeeBurnerInterface feeBurner) public onlyAdmin {
        require(feeBurner != address(0));

        FeeBurnerContractSet(feeBurner, feeBurnerContract);
        feeBurnerContract = feeBurner;
    }

    event KyberNetwrokParamsSet(uint maxGasPrice, uint negligibleRateDiff);

    function setParams(
        uint                  _maxGasPrice,
        uint                  _negligibleRateDiff
    )
        public
        onlyAdmin
    {
        require(_negligibleRateDiff <= 100 * 100); // at most 100%

        maxGasPriceValue = _maxGasPrice;
        negligibleRateDiff = _negligibleRateDiff;
        KyberNetwrokParamsSet(maxGasPriceValue, negligibleRateDiff);
    }

    event KyberNetworkSetEnable(bool isEnabled);

    function setEnable(bool _enable) public onlyAdmin {
        if (_enable) {
            require(feeBurnerContract != address(0));
            require(expectedRateContract != address(0));
            require(kyberNetworkProxyContract != address(0));
        }
        isEnabled = _enable;

        KyberNetworkSetEnable(isEnabled);
    }

    function setInfo(bytes32 field, uint value) public onlyOperator {
        infoFields[field] = value;
    }

    event KyberProxySet(address proxy, address sender);

    function setKyberProxy(address networkProxy) public onlyAdmin {
        require(networkProxy != address(0));
        kyberNetworkProxyContract = networkProxy;
        KyberProxySet(kyberNetworkProxyContract, msg.sender);
    }

    /// @dev returns number of reserves
    /// @return number of reserves
    function getNumReserves() public view returns(uint) {
        return reserves.length;
    }

    /// @notice should be called off chain
    /// @dev get an array of all reserves
    /// @return An array of all reserves
    function getReserves() public view returns(KyberReserveInterface[]) {
        return reserves;
    }

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

    function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty)
        public view
        returns(uint expectedRate, uint slippageRate)
    {
        require(expectedRateContract != address(0));
        bool includePermissionless = true;

        if (srcQty & PERM_HINT_GET_RATE > 0) {
            includePermissionless = false;
            srcQty = srcQty & ~PERM_HINT_GET_RATE;
        }

        return expectedRateContract.getExpectedRate(src, dest, srcQty, includePermissionless);
    }

    function getExpectedRateOnlyPermission(ERC20 src, ERC20 dest, uint srcQty)
        public view
        returns(uint expectedRate, uint slippageRate)
    {
        require(expectedRateContract != address(0));
        return expectedRateContract.getExpectedRate(src, dest, srcQty, false);
    }

    function getUserCapInWei(address user) public view returns(uint) {
        if (whiteListContract == address(0)) return (2 ** 255);
        return whiteListContract.getUserCapInWei(user);
    }

    function getUserCapInTokenWei(address user, ERC20 token) public view returns(uint) {
        //future feature
        user;
        token;
        require(false);
    }

    struct BestRateResult {
        uint rate;
        address reserve1;
        address reserve2;
        uint weiAmount;
        uint rateSrcToEth;
        uint rateEthToDest;
        uint destAmount;
    }

    /// @notice use token address ETH_TOKEN_ADDRESS for ether
    /// @dev best conversion rate for a pair of tokens, if number of reserves have small differences. randomize
    /// @param src Src token
    /// @param dest Destination token
    /// @return obsolete - used to return best reserve index. not relevant anymore for this API.
    function findBestRate(ERC20 src, ERC20 dest, uint srcAmount) public view returns(uint obsolete, uint rate) {
        BestRateResult memory result = findBestRateTokenToToken(src, dest, srcAmount, EMPTY_HINT);
        return(0, result.rate);
    }

    function findBestRateOnlyPermission(ERC20 src, ERC20 dest, uint srcAmount)
        public
        view
        returns(uint obsolete, uint rate)
    {
        BestRateResult memory result = findBestRateTokenToToken(src, dest, srcAmount, PERM_HINT);
        return(0, result.rate);
    }

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

    function info(bytes32 field) public view returns(uint) {
        return infoFields[field];
    }

    /* solhint-disable code-complexity */
    // Regarding complexity. Below code follows the required algorithm for choosing a reserve.
    //  It has been tested, reviewed and found to be clear enough.
    //@dev this function always src or dest are ether. can't do token to token
    function searchBestRate(ERC20 src, ERC20 dest, uint srcAmount, bool usePermissionless)
        public
        view
        returns(address, uint)
    {
        uint bestRate = 0;
        uint bestReserve = 0;
        uint numRelevantReserves = 0;

        //return 1 for ether to ether
        if (src == dest) return (reserves[bestReserve], PRECISION);

        address[] memory reserveArr;

        reserveArr = src == ETH_TOKEN_ADDRESS ? reservesPerTokenDest[dest] : reservesPerTokenSrc[src];

        if (reserveArr.length == 0) return (reserves[bestReserve], bestRate);

        uint[] memory rates = new uint[](reserveArr.length);
        uint[] memory reserveCandidates = new uint[](reserveArr.length);

        for (uint i = 0; i < reserveArr.length; i++) {
            //list all reserves that have this token.
            if (!usePermissionless && reserveType[reserveArr[i]] == ReserveType.PERMISSIONLESS) {
                continue;
            }

            rates[i] = (KyberReserveInterface(reserveArr[i])).getConversionRate(src, dest, srcAmount, block.number);

            if (rates[i] > bestRate) {
                //best rate is highest rate
                bestRate = rates[i];
            }
        }

        if (bestRate > 0) {
            uint smallestRelevantRate = (bestRate * 10000) / (10000 + negligibleRateDiff);

            for (i = 0; i < reserveArr.length; i++) {
                if (rates[i] >= smallestRelevantRate) {
                    reserveCandidates[numRelevantReserves++] = i;
                }
            }

            if (numRelevantReserves > 1) {
                //when encountering small rate diff from bestRate. draw from relevant reserves
                bestReserve = reserveCandidates[uint(block.blockhash(block.number-1)) % numRelevantReserves];
            } else {
                bestReserve = reserveCandidates[0];
            }

            bestRate = rates[bestReserve];
        }

        return (reserveArr[bestReserve], bestRate);
    }
    /* solhint-enable code-complexity */

    function findBestRateTokenToToken(ERC20 src, ERC20 dest, uint srcAmount, bytes hint) internal view
        returns(BestRateResult result)
    {
        //by default we use permission less reserves
        bool usePermissionless = true;

        // if hint in first 4 bytes == 'PERM' only permissioned reserves will be used.
        if ((hint.length >= 4) && (keccak256(hint[0], hint[1], hint[2], hint[3]) == keccak256(PERM_HINT))) {
            usePermissionless = false;
        }

        (result.reserve1, result.rateSrcToEth) =
            searchBestRate(src, ETH_TOKEN_ADDRESS, srcAmount, usePermissionless);

        result.weiAmount = calcDestAmount(src, ETH_TOKEN_ADDRESS, srcAmount, result.rateSrcToEth);

        (result.reserve2, result.rateEthToDest) =
            searchBestRate(ETH_TOKEN_ADDRESS, dest, result.weiAmount, usePermissionless);

        result.destAmount = calcDestAmount(ETH_TOKEN_ADDRESS, dest, result.weiAmount, result.rateEthToDest);

        result.rate = calcRateFromQty(srcAmount, result.destAmount, getDecimals(src), getDecimals(dest));
    }

    function listPairs(address reserve, ERC20 token, bool isTokenToEth, bool add) internal {
        uint i;
        address[] storage reserveArr = reservesPerTokenDest[token];

        if (isTokenToEth) {
            reserveArr = reservesPerTokenSrc[token];
        }

        for (i = 0; i < reserveArr.length; i++) {
            if (reserve == reserveArr[i]) {
                if (add) {
                    break; //already added
                } else {
                    //remove
                    reserveArr[i] = reserveArr[reserveArr.length - 1];
                    reserveArr.length--;
                    break;
                }
            }
        }

        if (add && i == reserveArr.length) {
            //if reserve wasn't found add it
            reserveArr.push(reserve);
        }
    }

    event KyberTrade(address indexed trader, ERC20 src, ERC20 dest, uint srcAmount, uint dstAmount,
        address destAddress, uint ethWeiValue, address reserve1, address reserve2, bytes hint);

    /* solhint-disable function-max-lines */
    //  Most of the lines here are functions calls spread over multiple lines. We find this function readable enough
    /// @notice use token address ETH_TOKEN_ADDRESS for ether
    /// @dev trade api for kyber network.
    /// @param tradeInput structure of trade inputs
    function trade(TradeInput tradeInput) internal returns(uint) {
        require(isEnabled);
        require(tx.gasprice <= maxGasPriceValue);
        require(validateTradeInput(tradeInput.src, tradeInput.srcAmount, tradeInput.dest, tradeInput.destAddress));

        BestRateResult memory rateResult =
            findBestRateTokenToToken(tradeInput.src, tradeInput.dest, tradeInput.srcAmount, tradeInput.hint);

        require(rateResult.rate > 0);
        require(rateResult.rate < MAX_RATE);
        require(rateResult.rate >= tradeInput.minConversionRate);

        uint actualDestAmount;
        uint weiAmount;
        uint actualSrcAmount;

        (actualSrcAmount, weiAmount, actualDestAmount) = calcActualAmounts(tradeInput.src,
            tradeInput.dest,
            tradeInput.srcAmount,
            tradeInput.maxDestAmount,
            rateResult);

        require(getUserCapInWei(tradeInput.trader) >= weiAmount);
        require(handleChange(tradeInput.src, tradeInput.srcAmount, actualSrcAmount, tradeInput.trader));

        require(doReserveTrade(     //src to ETH
                tradeInput.src,
                actualSrcAmount,
                ETH_TOKEN_ADDRESS,
                this,
                weiAmount,
                KyberReserveInterface(rateResult.reserve1),
                rateResult.rateSrcToEth,
                true));

        require(doReserveTrade(     //Eth to dest
                ETH_TOKEN_ADDRESS,
                weiAmount,
                tradeInput.dest,
                tradeInput.destAddress,
                actualDestAmount,
                KyberReserveInterface(rateResult.reserve2),
                rateResult.rateEthToDest,
                true));

        if (tradeInput.src != ETH_TOKEN_ADDRESS) //"fake" trade. (ether to ether) - don't burn.
            require(feeBurnerContract.handleFees(weiAmount, rateResult.reserve1, tradeInput.walletId));
        if (tradeInput.dest != ETH_TOKEN_ADDRESS) //"fake" trade. (ether to ether) - don't burn.
            require(feeBurnerContract.handleFees(weiAmount, rateResult.reserve2, tradeInput.walletId));

        KyberTrade({
            trader: tradeInput.trader,
            src: tradeInput.src,
            dest: tradeInput.dest,
            srcAmount: actualSrcAmount,
            dstAmount: actualDestAmount,
            destAddress: tradeInput.destAddress,
            ethWeiValue: weiAmount,
            reserve1: (tradeInput.src == ETH_TOKEN_ADDRESS) ? address(0) : rateResult.reserve1,
            reserve2:  (tradeInput.dest == ETH_TOKEN_ADDRESS) ? address(0) : rateResult.reserve2,
            hint: tradeInput.hint
        });

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

    function calcActualAmounts (ERC20 src, ERC20 dest, uint srcAmount, uint maxDestAmount, BestRateResult rateResult)
        internal view returns(uint actualSrcAmount, uint weiAmount, uint actualDestAmount)
    {
        if (rateResult.destAmount > maxDestAmount) {
            actualDestAmount = maxDestAmount;
            weiAmount = calcSrcAmount(ETH_TOKEN_ADDRESS, dest, actualDestAmount, rateResult.rateEthToDest);
            actualSrcAmount = calcSrcAmount(src, ETH_TOKEN_ADDRESS, weiAmount, rateResult.rateSrcToEth);
            require(actualSrcAmount <= srcAmount);
        } else {
            actualDestAmount = rateResult.destAmount;
            actualSrcAmount = srcAmount;
            weiAmount = rateResult.weiAmount;
        }
    }

    /// @notice use token address ETH_TOKEN_ADDRESS for ether
    /// @dev do one trade with a reserve
    /// @param src Src token
    /// @param amount amount of src tokens
    /// @param dest   Destination token
    /// @param destAddress Address to send tokens to
    /// @param reserve Reserve to use
    /// @param validate If true, additional validations are applicable
    /// @return true if trade is successful
    function doReserveTrade(
        ERC20 src,
        uint amount,
        ERC20 dest,
        address destAddress,
        uint expectedDestAmount,
        KyberReserveInterface reserve,
        uint conversionRate,
        bool validate
    )
        internal
        returns(bool)
    {
        uint callValue = 0;

        if (src == dest) {
            //this is for a "fake" trade when both src and dest are ethers.
            if (destAddress != (address(this)))
                destAddress.transfer(amount);
            return true;
        }

        if (src == ETH_TOKEN_ADDRESS) {
            callValue = amount;
        }

        // reserve sends tokens/eth to network. network sends it to destination
        require(reserve.trade.value(callValue)(src, amount, dest, this, conversionRate, validate));

        if (destAddress != address(this)) {
            //for token to token dest address is network. and Ether / token already here...
            if (dest == ETH_TOKEN_ADDRESS) {
                destAddress.transfer(expectedDestAmount);
            } else {
                require(dest.transfer(destAddress, expectedDestAmount));
            }
        }

        return true;
    }

    /// when user sets max dest amount we could have too many source tokens == change. so we send it back to user.
    function handleChange (ERC20 src, uint srcAmount, uint requiredSrcAmount, address trader) internal returns (bool) {

        if (requiredSrcAmount < srcAmount) {
            //if there is "change" send back to trader
            if (src == ETH_TOKEN_ADDRESS) {
                trader.transfer(srcAmount - requiredSrcAmount);
            } else {
                require(src.transfer(trader, (srcAmount - requiredSrcAmount)));
            }
        }

        return true;
    }

    /// @notice use token address ETH_TOKEN_ADDRESS for ether
    /// @dev checks that user sent ether/tokens to contract before trade
    /// @param src Src token
    /// @param srcAmount amount of src tokens
    /// @return true if tradeInput is valid
    function validateTradeInput(ERC20 src, uint srcAmount, ERC20 dest, address destAddress)
        internal
        view
        returns(bool)
    {
        require(srcAmount <= MAX_QTY);
        require(srcAmount != 0);
        require(destAddress != address(0));
        require(src != dest);

        if (src == ETH_TOKEN_ADDRESS) {
            require(msg.value == srcAmount);
        } else {
            require(msg.value == 0);
            //funds should have been moved to this contract already.
            require(src.balanceOf(this) >= srcAmount);
        }

        return true;
    }
}

pragma solidity 0.4.18;

// File: contracts/FeeBurnerInterface.sol

interface FeeBurnerInterface {
    function handleFees (uint tradeWeiAmount, address reserve, address wallet) public returns(bool);
    function setReserveData(address reserve, uint feesInBps, address kncWallet) public;
}

// 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/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/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/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/FeeBurner.sol

interface BurnableToken {
    function transferFrom(address _from, address _to, uint _value) public returns (bool);
    function burnFrom(address _from, uint256 _value) public returns (bool);
}


contract FeeBurner is Withdrawable, FeeBurnerInterface, Utils2 {

    mapping(address=>uint) public reserveFeesInBps;
    mapping(address=>address) public reserveKNCWallet; //wallet holding knc per reserve. from here burn and send fees.
    mapping(address=>uint) public walletFeesInBps; // wallet that is the source of tx is entitled so some fees.
    mapping(address=>uint) public reserveFeeToBurn;
    mapping(address=>uint) public feePayedPerReserve; // track burned fees and sent wallet fees per reserve.
    mapping(address=>mapping(address=>uint)) public reserveFeeToWallet;
    address public taxWallet;
    uint public taxFeeBps = 0; // burned fees are taxed. % out of burned fees.

    BurnableToken public knc;
    KyberNetworkInterface public kyberNetwork;
    uint public kncPerEthRatePrecision = 600 * PRECISION; //--> 1 ether = 600 knc tokens

    function FeeBurner(
        address _admin,
        BurnableToken _kncToken,
        KyberNetworkInterface _kyberNetwork,
        uint _initialKncToEthRatePrecision
    )
        public
    {
        require(_admin != address(0));
        require(_kncToken != address(0));
        require(_kyberNetwork != address(0));
        require(_initialKncToEthRatePrecision != 0);

        kyberNetwork = _kyberNetwork;
        admin = _admin;
        knc = _kncToken;
        kncPerEthRatePrecision = _initialKncToEthRatePrecision;
    }

    event ReserveDataSet(address reserve, uint feeInBps, address kncWallet);

    function setReserveData(address reserve, uint feesInBps, address kncWallet) public onlyOperator {
        require(feesInBps < 100); // make sure it is always < 1%
        require(kncWallet != address(0));
        reserveFeesInBps[reserve] = feesInBps;
        reserveKNCWallet[reserve] = kncWallet;
        ReserveDataSet(reserve, feesInBps, kncWallet);
    }

    event WalletFeesSet(address wallet, uint feesInBps);

    function setWalletFees(address wallet, uint feesInBps) public onlyAdmin {
        require(feesInBps < 10000); // under 100%
        walletFeesInBps[wallet] = feesInBps;
        WalletFeesSet(wallet, feesInBps);
    }

    event TaxFeesSet(uint feesInBps);

    function setTaxInBps(uint _taxFeeBps) public onlyAdmin {
        require(_taxFeeBps < 10000); // under 100%
        taxFeeBps = _taxFeeBps;
        TaxFeesSet(_taxFeeBps);
    }

    event TaxWalletSet(address taxWallet);

    function setTaxWallet(address _taxWallet) public onlyAdmin {
        require(_taxWallet != address(0));
        taxWallet = _taxWallet;
        TaxWalletSet(_taxWallet);
    }

    event KNCRateSet(uint ethToKncRatePrecision, uint kyberEthKnc, uint kyberKncEth, address updater);

    function setKNCRate() public {
        //query kyber for knc rate sell and buy
        uint kyberEthKncRate;
        uint kyberKncEthRate;
        (kyberEthKncRate, ) = kyberNetwork.getExpectedRate(ETH_TOKEN_ADDRESS, ERC20(knc), (10 ** 18));
        (kyberKncEthRate, ) = kyberNetwork.getExpectedRate(ERC20(knc), ETH_TOKEN_ADDRESS, (10 ** 18));

        //check "reasonable" spread == diff not too big. rate wasn't tampered.
        require(kyberEthKncRate * kyberKncEthRate < PRECISION ** 2 * 2);
        require(kyberEthKncRate * kyberKncEthRate > PRECISION ** 2 / 2);

        require(kyberEthKncRate <= MAX_RATE);
        kncPerEthRatePrecision = kyberEthKncRate;
        KNCRateSet(kncPerEthRatePrecision, kyberEthKncRate, kyberKncEthRate, msg.sender);
    }

    event AssignFeeToWallet(address reserve, address wallet, uint walletFee);
    event AssignBurnFees(address reserve, uint burnFee);

    function handleFees(uint tradeWeiAmount, address reserve, address wallet) public returns(bool) {
        require(msg.sender == address(kyberNetwork));
        require(tradeWeiAmount <= MAX_QTY);

        uint kncAmount = calcDestAmount(ETH_TOKEN_ADDRESS, ERC20(knc), tradeWeiAmount, kncPerEthRatePrecision);
        uint fee = kncAmount * reserveFeesInBps[reserve] / 10000;

        uint walletFee = fee * walletFeesInBps[wallet] / 10000;
        require(fee >= walletFee);
        uint feeToBurn = fee - walletFee;

        if (walletFee > 0) {
            reserveFeeToWallet[reserve][wallet] += walletFee;
            AssignFeeToWallet(reserve, wallet, walletFee);
        }

        if (feeToBurn > 0) {
            AssignBurnFees(reserve, feeToBurn);
            reserveFeeToBurn[reserve] += feeToBurn;
        }

        return true;
    }

    event BurnAssignedFees(address indexed reserve, address sender, uint quantity);

    event SendTaxFee(address indexed reserve, address sender, address taxWallet, uint quantity);

    // this function is callable by anyone
    function burnReserveFees(address reserve) public {
        uint burnAmount = reserveFeeToBurn[reserve];
        uint taxToSend = 0;
        require(burnAmount > 2);
        reserveFeeToBurn[reserve] = 1; // leave 1 twei to avoid spikes in gas fee
        if (taxWallet != address(0) && taxFeeBps != 0) {
            taxToSend = (burnAmount - 1) * taxFeeBps / 10000;
            require(burnAmount - 1 > taxToSend);
            burnAmount -= taxToSend;
            if (taxToSend > 0) {
                require(knc.transferFrom(reserveKNCWallet[reserve], taxWallet, taxToSend));
                SendTaxFee(reserve, msg.sender, taxWallet, taxToSend);
            }
        }
        require(knc.burnFrom(reserveKNCWallet[reserve], burnAmount - 1));

        //update reserve "payments" so far
        feePayedPerReserve[reserve] += (taxToSend + burnAmount - 1);

        BurnAssignedFees(reserve, msg.sender, (burnAmount - 1));
    }

    event SendWalletFees(address indexed wallet, address reserve, address sender);

    // this function is callable by anyone
    function sendFeeToWallet(address wallet, address reserve) public {
        uint feeAmount = reserveFeeToWallet[reserve][wallet];
        require(feeAmount > 1);
        reserveFeeToWallet[reserve][wallet] = 1; // leave 1 twei to avoid spikes in gas fee
        require(knc.transferFrom(reserveKNCWallet[reserve], wallet, feeAmount - 1));

        feePayedPerReserve[reserve] += (feeAmount - 1);
        SendWalletFees(wallet, reserve, msg.sender);
    }
}

pragma solidity ^0.4.13;

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

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

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

contract Ownable {
  address public owner;


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() {
    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) onlyOwner {
    if (newOwner != address(0)) {
      owner = newOwner;
    }
  }

}



contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) constant returns (uint256);
  function transfer(address to, uint256 value) returns (bool);
  
  // KYBER-NOTE! code changed to comply with ERC20 standard
  event Transfer(address indexed _from, address indexed _to, uint _value);
  //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) returns (bool) {
    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) constant returns (uint256 balance) {
    return balances[_owner];
  }

}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) returns (bool);
  function approve(address spender, uint256 value) returns (bool);
  
  // KYBER-NOTE! code changed to comply with ERC20 standard
  event Approval(address indexed _owner, address indexed _spender, uint _value);
  //event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) 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 amout of tokens to be transfered
   */
  function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    // KYBER-NOTE! code changed to comply with ERC20 standard
    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    //balances[_from] = balances[_from].sub(_value); // this was removed
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Aprove the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  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;
  }

  /**
   * @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 specifing the amount of tokens still avaible for the spender.
   */
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

}

contract KyberNetworkCrystal is StandardToken, Ownable {
    string  public  constant name = "Kyber Network Crystal";
    string  public  constant symbol = "KNC";
    uint    public  constant decimals = 18;

    uint    public  saleStartTime;
    uint    public  saleEndTime;

    address public  tokenSaleContract;

    modifier onlyWhenTransferEnabled() {
        if( now <= saleEndTime && now >= saleStartTime ) {
            require( msg.sender == tokenSaleContract );
        }
        _;
    }

    modifier validDestination( address to ) {
        require(to != address(0x0));
        require(to != address(this) );
        _;
    }

    function KyberNetworkCrystal( uint tokenTotalAmount, uint startTime, uint endTime, address admin ) {
        // Mint all tokens. Then disable minting forever.
        balances[msg.sender] = tokenTotalAmount;
        totalSupply = tokenTotalAmount;
        Transfer(address(0x0), msg.sender, tokenTotalAmount);

        saleStartTime = startTime;
        saleEndTime = endTime;

        tokenSaleContract = msg.sender;
        transferOwnership(admin); // admin could drain tokens that were sent here by mistake
    }

    function transfer(address _to, uint _value)
        onlyWhenTransferEnabled
        validDestination(_to)
        returns (bool) {
        return super.transfer(_to, _value);
    }

    function transferFrom(address _from, address _to, uint _value)
        onlyWhenTransferEnabled
        validDestination(_to)
        returns (bool) {
        return super.transferFrom(_from, _to, _value);
    }

    event Burn(address indexed _burner, uint _value);

    function burn(uint _value) onlyWhenTransferEnabled
        returns (bool){
        balances[msg.sender] = balances[msg.sender].sub(_value);
        totalSupply = totalSupply.sub(_value);
        Burn(msg.sender, _value);
        Transfer(msg.sender, address(0x0), _value);
        return true;
    }

    // save some gas by making only one contract call
    function burnFrom(address _from, uint256 _value) onlyWhenTransferEnabled
        returns (bool) {
        assert( transferFrom( _from, msg.sender, _value ) );
        return burn(_value);
    }

    function emergencyERC20Drain( ERC20 token, uint amount ) onlyOwner {
        token.transfer( owner, amount );
    }
}