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0xbc1709ceaaf158195c7d0bed7d5600450915d749e2916e685e285c4c8fc292a915 days 7 hrs ago0xa5fbe12f0a1e096de08d481b799fdf6bfe2f4fe1  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00061798
0x83dc851ab3f8624b1fe57450eeddaf78a61b8a94cfa0a9c10fff69a70a82ae5130 days 8 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.001080569
0x59f9753213d8dec9b8907f0b649ca463329cdfa79e0c04c00b33080041ca4a8f30 days 11 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000253445
0x173abf5e65b48647d95f47837ca7e32fb6deb99d16dccaa9ed67b12b13af441430 days 12 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00025436
0x7e8c1f3fdbda30fec100eaf78be8fcdba108e583c89c13cf2fea40e8955eec4c30 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000253445
0xbf493c989648caad9a6f3090b9de5af125a8966d8ce38649ac42099cfc15579c30 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000253445
0xd44491e7b23df26ca5ffe47b4cfc4242f729e244abbc6856bb13b2c36d0c7c3d30 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000253445
0xa51dae112f4797188075e996c0973fdf60855471cae6c9ab21ee89c1ac33ec4030 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000253125
0xe68ae6b57cde89c07a965b1f8bdfdbb180c9987ae04a8c08696c8f6c834425bd30 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000456201
0x6e3e1d36fc83dd74a69be1c4b88d74afd7c850021571d6b5020457239b1c0abf30 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000253445
0x86e171b5435de9f7c6dcf1e9b7571b9d1bd98449ece529107b79c1dcaf9db0ae30 days 13 hrs ago0x9fb4c5ef6e8d1d5441c80e53c997c5ba00a83e9b  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000456201
0xbf43ec317768dc39c6cbce615292766df48216d5276ab87ed014e3b8626a6a6c37 days 1 hr ago0x0040c769b501805c6ebd77e3e2c64073fe4ebd69  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00133098
0xa557f44b36e734daaecfabb4ba95a0c862b817aa14957af122fa389d94f7f06a37 days 6 hrs ago0x0040c769b501805c6ebd77e3e2c64073fe4ebd69  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00058389
0xf2ca43a3cb2ccd531fd1d42602b26754ef3c15de17d0e0ae6df41ef86d1e13b137 days 6 hrs ago0x009bb5e9fcf28e5e601b7d0e9e821da6365d0a9c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00132906
0xff7dbf239fe59e34bd8eca3c312ab628f52fc2745cc68e9eeab04e8efcbea64753 days 10 hrs ago0x009bb5e9fcf28e5e601b7d0e9e821da6365d0a9c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00008846089
0xcc6cef0f98f90f3751bcc46822c5c58620009ba916f554da6e4e2cf19efd0bab58 days 10 hrs ago0xc24aa4a2728e299d041241a9a3258c818bb86bf4  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000781322
0xdf949ed6d9c275792ee92cd686506f7a8297e799fe0ccec97aa3df16cffb1a9258 days 15 hrs ago0xc24aa4a2728e299d041241a9a3258c818bb86bf4  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.000393192
0x97962b62883bc9be2b5a8aa9eac297bffe863d0f1a67767ef69bc5151f34ec0b58 days 16 hrs ago0xc24aa4a2728e299d041241a9a3258c818bb86bf4  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.000001 Ether0.000346308
0xf589abc3b5130230595100d47fa3469b0d792608d0349b0bfb83b5c9a789697069 days 15 hrs ago0x009bb5e9fcf28e5e601b7d0e9e821da6365d0a9c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.0005924205
0x2ac064dfccedd1f29ccf7ec7aac11bf0dac3903ff5e8426cd012f8797f9abbcd69 days 15 hrs ago0x009bb5e9fcf28e5e601b7d0e9e821da6365d0a9c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.0005983605
0x79a6b93093d1c62177ab8799c2dcd5476dbd5c62a817187105a7737c969331cb69 days 15 hrs ago0x009bb5e9fcf28e5e601b7d0e9e821da6365d0a9c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00059589
0xd4477225499dc92576b262109b1f4172dc1501ecf6cf95e25a87f7b5241083b769 days 15 hrs ago0x009bb5e9fcf28e5e601b7d0e9e821da6365d0a9c  IN    Contract Creation0 Ether0.02772423
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0x4eed34c8a4a938dcb21b847c3cbce310770425a098bc8caa175ad23ae8c524fa61558693 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151.3 Ether
0x4eed34c8a4a938dcb21b847c3cbce310770425a098bc8caa175ad23ae8c524fa61558693 mins ago0x3839416bd0095d97be9b354cbfb0f6807d4d609e0xf20b9e713a33f61fa38792d2afaf1cd30339126a1.3 Ether
0x0af3dfb3cbec9a36cb1d6b1824e97d15448fb1cf9f0229a013600dfcdded7ccf61558693 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151 Ether
0x0af3dfb3cbec9a36cb1d6b1824e97d15448fb1cf9f0229a013600dfcdded7ccf61558693 mins ago0x3839416bd0095d97be9b354cbfb0f6807d4d609e0xf20b9e713a33f61fa38792d2afaf1cd30339126a1 Ether
0xa2ece8cef257e775b2f6c8c96b54adbe7c16782ed7b35a6ef2bcaa0b6a2b4ed061558693 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3150.208 Ether
0xa2ece8cef257e775b2f6c8c96b54adbe7c16782ed7b35a6ef2bcaa0b6a2b4ed061558693 mins ago0x3839416bd0095d97be9b354cbfb0f6807d4d609e0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.208 Ether
0x63b691ece7c99146eb0f7da2e6d51db0b7a944ff9fde6769eaca5bba7bc22002615582216 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3150.0877 Ether
0x63b691ece7c99146eb0f7da2e6d51db0b7a944ff9fde6769eaca5bba7bc22002615582216 mins ago0x3839416bd0095d97be9b354cbfb0f6807d4d609e0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.0877 Ether
0x5e9ecb6543dd08bb5a9cf9e94c28c87eedb778ca65fc48cff136e9684f5bfd40615582016 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3150.21 Ether
0x5e9ecb6543dd08bb5a9cf9e94c28c87eedb778ca65fc48cff136e9684f5bfd40615582016 mins ago0x3839416bd0095d97be9b354cbfb0f6807d4d609e0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.21 Ether
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Warning: The compiled contract might be susceptible to NestedArrayFunctionCallDecoder (medium-severity) Solidity compiler bugs.

Contract Source Code Verified (Exact match)
Contract Name: BancorNetwork
Compiler Version: v0.4.21+commit.dfe3193c
Optimization Enabled: Yes
Runs (Optimiser):  500



  Contract Source Code   Find Similiar Contracts

pragma solidity ^0.4.21;

/*
    Owned contract interface
*/
contract IOwned {
    // this function isn't abstract since the compiler emits automatically generated getter functions as external
    function owner() public view returns (address) {}

    function transferOwnership(address _newOwner) public;
    function acceptOwnership() public;
}

/*
    ERC20 Standard Token interface
*/
contract IERC20Token {
    // these functions aren't abstract since the compiler emits automatically generated getter functions as external
    function name() public view returns (string) {}
    function symbol() public view returns (string) {}
    function decimals() public view returns (uint8) {}
    function totalSupply() public view returns (uint256) {}
    function balanceOf(address _owner) public view returns (uint256) { _owner; }
    function allowance(address _owner, address _spender) public view returns (uint256) { _owner; _spender; }

    function transfer(address _to, uint256 _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
    function approve(address _spender, uint256 _value) public returns (bool success);
}

/*
    Contract Registry interface
*/
contract IContractRegistry {
    function getAddress(bytes32 _contractName) public view returns (address);
}

/*
    Contract Features interface
*/
contract IContractFeatures {
    function isSupported(address _contract, uint256 _features) public view returns (bool);
    function enableFeatures(uint256 _features, bool _enable) public;
}

/*
    Whitelist interface
*/
contract IWhitelist {
    function isWhitelisted(address _address) public view returns (bool);
}

/*
    Token Holder interface
*/
contract ITokenHolder is IOwned {
    function withdrawTokens(IERC20Token _token, address _to, uint256 _amount) public;
}

/*
    Ether Token interface
*/
contract IEtherToken is ITokenHolder, IERC20Token {
    function deposit() public payable;
    function withdraw(uint256 _amount) public;
    function withdrawTo(address _to, uint256 _amount) public;
}

/*
    Smart Token interface
*/
contract ISmartToken is IOwned, IERC20Token {
    function disableTransfers(bool _disable) public;
    function issue(address _to, uint256 _amount) public;
    function destroy(address _from, uint256 _amount) public;
}

/*
    Bancor Gas Price Limit interface
*/
contract IBancorGasPriceLimit {
    function gasPrice() public view returns (uint256) {}
    function validateGasPrice(uint256) public view;
}

/*
    Bancor Converter interface
*/
contract IBancorConverter {
    function getReturn(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount) public view returns (uint256);
    function convert(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
    function conversionWhitelist() public view returns (IWhitelist) {}
    // deprecated, backward compatibility
    function change(IERC20Token _fromToken, IERC20Token _toToken, uint256 _amount, uint256 _minReturn) public returns (uint256);
}

/*
    Bancor Network interface
*/
contract IBancorNetwork {
    function convert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public payable returns (uint256);
    function convertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public payable returns (uint256);
    function convertForPrioritized2(
        IERC20Token[] _path,
        uint256 _amount,
        uint256 _minReturn,
        address _for,
        uint256 _block,
        uint8 _v,
        bytes32 _r,
        bytes32 _s)
        public payable returns (uint256);

    // deprecated, backward compatibility
    function convertForPrioritized(
        IERC20Token[] _path,
        uint256 _amount,
        uint256 _minReturn,
        address _for,
        uint256 _block,
        uint256 _nonce,
        uint8 _v,
        bytes32 _r,
        bytes32 _s)
        public payable returns (uint256);
}

/*
    Utilities & Common Modifiers
*/
contract Utils {
    /**
        constructor
    */
    function Utils() public {
    }

    // verifies that an amount is greater than zero
    modifier greaterThanZero(uint256 _amount) {
        require(_amount > 0);
        _;
    }

    // validates an address - currently only checks that it isn't null
    modifier validAddress(address _address) {
        require(_address != address(0));
        _;
    }

    // verifies that the address is different than this contract address
    modifier notThis(address _address) {
        require(_address != address(this));
        _;
    }

    // Overflow protected math functions

    /**
        @dev returns the sum of _x and _y, asserts if the calculation overflows

        @param _x   value 1
        @param _y   value 2

        @return sum
    */
    function safeAdd(uint256 _x, uint256 _y) internal pure returns (uint256) {
        uint256 z = _x + _y;
        assert(z >= _x);
        return z;
    }

    /**
        @dev returns the difference of _x minus _y, asserts if the subtraction results in a negative number

        @param _x   minuend
        @param _y   subtrahend

        @return difference
    */
    function safeSub(uint256 _x, uint256 _y) internal pure returns (uint256) {
        assert(_x >= _y);
        return _x - _y;
    }

    /**
        @dev returns the product of multiplying _x by _y, asserts if the calculation overflows

        @param _x   factor 1
        @param _y   factor 2

        @return product
    */
    function safeMul(uint256 _x, uint256 _y) internal pure returns (uint256) {
        uint256 z = _x * _y;
        assert(_x == 0 || z / _x == _y);
        return z;
    }
}

/*
    Provides support and utilities for contract ownership
*/
contract Owned is IOwned {
    address public owner;
    address public newOwner;

    event OwnerUpdate(address indexed _prevOwner, address indexed _newOwner);

    /**
        @dev constructor
    */
    function Owned() public {
        owner = msg.sender;
    }

    // allows execution by the owner only
    modifier ownerOnly {
        assert(msg.sender == owner);
        _;
    }

    /**
        @dev allows transferring the contract ownership
        the new owner still needs to accept the transfer
        can only be called by the contract owner

        @param _newOwner    new contract owner
    */
    function transferOwnership(address _newOwner) public ownerOnly {
        require(_newOwner != owner);
        newOwner = _newOwner;
    }

    /**
        @dev used by a new owner to accept an ownership transfer
    */
    function acceptOwnership() public {
        require(msg.sender == newOwner);
        emit OwnerUpdate(owner, newOwner);
        owner = newOwner;
        newOwner = address(0);
    }
}

/**
    Id definitions for bancor contracts

    Can be used in conjunction with the contract registry to get contract addresses
*/
contract ContractIds {
    bytes32 public constant BANCOR_NETWORK = "BancorNetwork";
    bytes32 public constant BANCOR_FORMULA = "BancorFormula";
    bytes32 public constant CONTRACT_FEATURES = "ContractFeatures";
}

/**
    Id definitions for bancor contract features

    Can be used to query the ContractFeatures contract to check whether a certain feature is supported by a contract
*/
contract FeatureIds {
    // converter features
    uint256 public constant CONVERTER_CONVERSION_WHITELIST = 1 << 0;
}

/*
    We consider every contract to be a 'token holder' since it's currently not possible
    for a contract to deny receiving tokens.

    The TokenHolder's contract sole purpose is to provide a safety mechanism that allows
    the owner to send tokens that were sent to the contract by mistake back to their sender.
*/
contract TokenHolder is ITokenHolder, Owned, Utils {
    /**
        @dev constructor
    */
    function TokenHolder() public {
    }

    /**
        @dev withdraws tokens held by the contract and sends them to an account
        can only be called by the owner

        @param _token   ERC20 token contract address
        @param _to      account to receive the new amount
        @param _amount  amount to withdraw
    */
    function withdrawTokens(IERC20Token _token, address _to, uint256 _amount)
        public
        ownerOnly
        validAddress(_token)
        validAddress(_to)
        notThis(_to)
    {
        assert(_token.transfer(_to, _amount));
    }
}

/*
    The BancorNetwork contract is the main entry point for bancor token conversions.
    It also allows converting between any token in the bancor network to any other token
    in a single transaction by providing a conversion path.

    A note on conversion path -
    Conversion path is a data structure that's used when converting a token to another token in the bancor network
    when the conversion cannot necessarily be done by single converter and might require multiple 'hops'.
    The path defines which converters should be used and what kind of conversion should be done in each step.

    The path format doesn't include complex structure and instead, it is represented by a single array
    in which each 'hop' is represented by a 2-tuple - smart token & to token.
    In addition, the first element is always the source token.
    The smart token is only used as a pointer to a converter (since converter addresses are more likely to change).

    Format:
    [source token, smart token, to token, smart token, to token...]
*/
contract BancorNetwork is IBancorNetwork, TokenHolder, ContractIds, FeatureIds {
    address public signerAddress = 0x0;         // verified address that allows conversions with higher gas price
    IContractRegistry public registry;          // contract registry contract address
    IBancorGasPriceLimit public gasPriceLimit;  // bancor universal gas price limit contract

    mapping (address => bool) public etherTokens;       // list of all supported ether tokens
    mapping (bytes32 => bool) public conversionHashes;  // list of conversion hashes, to prevent re-use of the same hash

    /**
        @dev constructor

        @param _registry    address of a contract registry contract
    */
    function BancorNetwork(IContractRegistry _registry) public validAddress(_registry) {
        registry = _registry;
    }

    // validates a conversion path - verifies that the number of elements is odd and that maximum number of 'hops' is 10
    modifier validConversionPath(IERC20Token[] _path) {
        require(_path.length > 2 && _path.length <= (1 + 2 * 10) && _path.length % 2 == 1);
        _;
    }

    /*
        @dev allows the owner to update the contract registry contract address

        @param _registry   address of a contract registry contract
    */
    function setContractRegistry(IContractRegistry _registry)
        public
        ownerOnly
        validAddress(_registry)
        notThis(_registry)
    {
        registry = _registry;
    }

    /*
        @dev allows the owner to update the gas price limit contract address

        @param _gasPriceLimit   address of a bancor gas price limit contract
    */
    function setGasPriceLimit(IBancorGasPriceLimit _gasPriceLimit)
        public
        ownerOnly
        validAddress(_gasPriceLimit)
        notThis(_gasPriceLimit)
    {
        gasPriceLimit = _gasPriceLimit;
    }

    /*
        @dev allows the owner to update the signer address

        @param _signerAddress    new signer address
    */
    function setSignerAddress(address _signerAddress)
        public
        ownerOnly
        validAddress(_signerAddress)
        notThis(_signerAddress)
    {
        signerAddress = _signerAddress;
    }

    /**
        @dev allows the owner to register/unregister ether tokens

        @param _token       ether token contract address
        @param _register    true to register, false to unregister
    */
    function registerEtherToken(IEtherToken _token, bool _register)
        public
        ownerOnly
        validAddress(_token)
        notThis(_token)
    {
        etherTokens[_token] = _register;
    }

    /**
        @dev verifies that the signer address is trusted by recovering 
        the address associated with the public key from elliptic 
        curve signature, returns zero on error.
        notice that the signature is valid only for one conversion
        and expires after the give block.

        @return true if the signer is verified
    */
    function verifyTrustedSender(IERC20Token[] _path, uint256 _amount, uint256 _block, address _addr, uint8 _v, bytes32 _r, bytes32 _s) private returns(bool) {
        bytes32 hash = keccak256(_block, tx.gasprice, _addr, msg.sender, _amount, _path);

        // checking that it is the first conversion with the given signature
        // and that the current block number doesn't exceeded the maximum block
        // number that's allowed with the current signature
        require(!conversionHashes[hash] && block.number <= _block);

        // recovering the signing address and comparing it to the trusted signer
        // address that was set in the contract
        bytes32 prefixedHash = keccak256("\x19Ethereum Signed Message:\n32", hash);
        bool verified = ecrecover(prefixedHash, _v, _r, _s) == signerAddress;

        // if the signer is the trusted signer - mark the hash so that it can't
        // be used multiple times
        if (verified)
            conversionHashes[hash] = true;
        return verified;
    }

    /**
        @dev converts the token to any other token in the bancor network by following
        a predefined conversion path and transfers the result tokens to a target account
        note that the converter should already own the source tokens

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
        @param _for         account that will receive the conversion result

        @return tokens issued in return
    */
    function convertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public payable returns (uint256) {
        return convertForPrioritized2(_path, _amount, _minReturn, _for, 0x0, 0x0, 0x0, 0x0);
    }

    /**
        @dev converts the token to any other token in the bancor network
        by following a predefined conversion path and transfers the result
        tokens to a target account.
        this version of the function also allows the verified signer
        to bypass the universal gas price limit.
        note that the converter should already own the source tokens

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
        @param _for         account that will receive the conversion result

        @return tokens issued in return
    */
    function convertForPrioritized2(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for, uint256 _block, uint8 _v, bytes32 _r, bytes32 _s)
        public
        payable
        validConversionPath(_path)
        returns (uint256)
    {
        // if ETH is provided, ensure that the amount is identical to _amount and verify that the source token is an ether token
        IERC20Token fromToken = _path[0];
        require(msg.value == 0 || (_amount == msg.value && etherTokens[fromToken]));

        // if ETH was sent with the call, the source is an ether token - deposit the ETH in it
        // otherwise, we assume we already have the tokens
        if (msg.value > 0)
            IEtherToken(fromToken).deposit.value(msg.value)();

        return convertForInternal(_path, _amount, _minReturn, _for, _block, _v, _r, _s);
    }

    /**
        @dev converts token to any other token in the bancor network
        by following the predefined conversion paths and transfers the result
        tokens to a targeted account.
        this version of the function also allows multiple conversions
        in a single atomic transaction.
        note that the converter should already own the source tokens

        @param _paths           merged conversion paths, i.e. [path1, path2, ...]. see conversion path format above
        @param _pathStartIndex  each item in the array is the start index of the nth path in _paths
        @param _amounts         amount to convert from (in the initial source token) for each path
        @param _minReturns      minimum return for each path. if the conversion results in an amount 
                                smaller than the minimum return - it is cancelled, must be nonzero
        @param _for             account that will receive the conversions result

        @return amount of conversion result for each path
    */
    function convertForMultiple(IERC20Token[] _paths, uint256[] _pathStartIndex, uint256[] _amounts, uint256[] _minReturns, address _for)
        public
        payable
        returns (uint256[])
    {
        // if ETH is provided, ensure that the total amount was converted into other tokens
        uint256 convertedValue = 0;
        uint256 pathEndIndex;
        
        // iterate over the conversion paths
        for (uint256 i = 0; i < _pathStartIndex.length; i += 1) {
            pathEndIndex = i == (_pathStartIndex.length - 1) ? _paths.length : _pathStartIndex[i + 1];

            // copy a single path from _paths into an array
            IERC20Token[] memory path = new IERC20Token[](pathEndIndex - _pathStartIndex[i]);
            for (uint256 j = _pathStartIndex[i]; j < pathEndIndex; j += 1) {
                path[j - _pathStartIndex[i]] = _paths[j];
            }

            // if ETH is provided, ensure that the amount is lower than the path amount and
            // verify that the source token is an ether token. otherwise ensure that 
            // the source is not an ether token
            IERC20Token fromToken = path[0];
            require(msg.value == 0 || (_amounts[i] <= msg.value && etherTokens[fromToken]) || !etherTokens[fromToken]);

            // if ETH was sent with the call, the source is an ether token - deposit the ETH path amount in it.
            // otherwise, we assume we already have the tokens
            if (msg.value > 0 && etherTokens[fromToken]) {
                IEtherToken(fromToken).deposit.value(_amounts[i])();
                convertedValue += _amounts[i];
            }
            _amounts[i] = convertForInternal(path, _amounts[i], _minReturns[i], _for, 0x0, 0x0, 0x0, 0x0);
        }

        // if ETH was provided, ensure that the full amount was converted
        require(convertedValue == msg.value);

        return _amounts;
    }

    /**
        @dev converts token to any other token in the bancor network
        by following a predefined conversion paths and transfers the result
        tokens to a target account.

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
        @param _for         account that will receive the conversion result
        @param _block       if the current block exceeded the given parameter - it is cancelled
        @param _v           (signature[128:130]) associated with the signer address and helps to validate if the signature is legit
        @param _r           (signature[0:64]) associated with the signer address and helps to validate if the signature is legit
        @param _s           (signature[64:128]) associated with the signer address and helps to validate if the signature is legit

        @return tokens issued in return
    */
    function convertForInternal(
        IERC20Token[] _path, 
        uint256 _amount, 
        uint256 _minReturn, 
        address _for, 
        uint256 _block, 
        uint8 _v, 
        bytes32 _r, 
        bytes32 _s
    )
        private
        validConversionPath(_path)
        returns (uint256)
    {
        if (_v == 0x0 && _r == 0x0 && _s == 0x0)
            gasPriceLimit.validateGasPrice(tx.gasprice);
        else
            require(verifyTrustedSender(_path, _amount, _block, _for, _v, _r, _s));

        // if ETH is provided, ensure that the amount is identical to _amount and verify that the source token is an ether token
        IERC20Token fromToken = _path[0];

        IERC20Token toToken;
        
        (toToken, _amount) = convertByPath(_path, _amount, _minReturn, fromToken, _for);

        // finished the conversion, transfer the funds to the target account
        // if the target token is an ether token, withdraw the tokens and send them as ETH
        // otherwise, transfer the tokens as is
        if (etherTokens[toToken])
            IEtherToken(toToken).withdrawTo(_for, _amount);
        else
            assert(toToken.transfer(_for, _amount));

        return _amount;
    }

    /**
        @dev executes the actual conversion by following the conversion path

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
        @param _fromToken   ERC20 token to convert from (the first element in the path)
        @param _for         account that will receive the conversion result

        @return ERC20 token to convert to (the last element in the path) & tokens issued in return
    */
    function convertByPath(
        IERC20Token[] _path,
        uint256 _amount,
        uint256 _minReturn,
        IERC20Token _fromToken,
        address _for
    ) private returns (IERC20Token, uint256) {
        ISmartToken smartToken;
        IERC20Token toToken;
        IBancorConverter converter;

        // get the contract features address from the registry
        IContractFeatures features = IContractFeatures(registry.getAddress(ContractIds.CONTRACT_FEATURES));

        // iterate over the conversion path
        uint256 pathLength = _path.length;
        for (uint256 i = 1; i < pathLength; i += 2) {
            smartToken = ISmartToken(_path[i]);
            toToken = _path[i + 1];
            converter = IBancorConverter(smartToken.owner());
            checkWhitelist(converter, _for, features);

            // if the smart token isn't the source (from token), the converter doesn't have control over it and thus we need to approve the request
            if (smartToken != _fromToken)
                ensureAllowance(_fromToken, converter, _amount);

            // make the conversion - if it's the last one, also provide the minimum return value
            _amount = converter.change(_fromToken, toToken, _amount, i == pathLength - 2 ? _minReturn : 1);
            _fromToken = toToken;
        }
        return (toToken, _amount);
    }

    /**
        @dev checks whether the given converter supports a whitelist and if so, ensures that
        the account that should receive the conversion result is actually whitelisted

        @param _converter   converter to check for whitelist
        @param _for         account that will receive the conversion result
        @param _features    contract features contract address
    */
    function checkWhitelist(IBancorConverter _converter, address _for, IContractFeatures _features) private view {
        IWhitelist whitelist;

        // check if the converter supports the conversion whitelist feature
        if (!_features.isSupported(_converter, FeatureIds.CONVERTER_CONVERSION_WHITELIST))
            return;

        // get the whitelist contract from the converter
        whitelist = _converter.conversionWhitelist();
        if (whitelist == address(0))
            return;

        // check if the account that should receive the conversion result is actually whitelisted
        require(whitelist.isWhitelisted(_for));
    }

    /**
        @dev claims the caller's tokens, converts them to any other token in the bancor network
        by following a predefined conversion path and transfers the result tokens to a target account
        note that allowance must be set beforehand

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero
        @param _for         account that will receive the conversion result

        @return tokens issued in return
    */
    function claimAndConvertFor(IERC20Token[] _path, uint256 _amount, uint256 _minReturn, address _for) public returns (uint256) {
        // we need to transfer the tokens from the caller to the converter before we follow
        // the conversion path, to allow it to execute the conversion on behalf of the caller
        // note: we assume we already have allowance
        IERC20Token fromToken = _path[0];
        assert(fromToken.transferFrom(msg.sender, this, _amount));
        return convertFor(_path, _amount, _minReturn, _for);
    }

    /**
        @dev converts the token to any other token in the bancor network by following
        a predefined conversion path and transfers the result tokens back to the sender
        note that the converter should already own the source tokens

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero

        @return tokens issued in return
    */
    function convert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public payable returns (uint256) {
        return convertFor(_path, _amount, _minReturn, msg.sender);
    }

    /**
        @dev claims the caller's tokens, converts them to any other token in the bancor network
        by following a predefined conversion path and transfers the result tokens back to the sender
        note that allowance must be set beforehand

        @param _path        conversion path, see conversion path format above
        @param _amount      amount to convert from (in the initial source token)
        @param _minReturn   if the conversion results in an amount smaller than the minimum return - it is cancelled, must be nonzero

        @return tokens issued in return
    */
    function claimAndConvert(IERC20Token[] _path, uint256 _amount, uint256 _minReturn) public returns (uint256) {
        return claimAndConvertFor(_path, _amount, _minReturn, msg.sender);
    }

    /**
        @dev utility, checks whether allowance for the given spender exists and approves one if it doesn't

        @param _token   token to check the allowance in
        @param _spender approved address
        @param _value   allowance amount
    */
    function ensureAllowance(IERC20Token _token, address _spender, uint256 _value) private {
        // check if allowance for the given amount already exists
        if (_token.allowance(this, _spender) >= _value)
            return;

        // if the allowance is nonzero, must reset it to 0 first
        if (_token.allowance(this, _spender) != 0)
            assert(_token.approve(_spender, 0));

        // approve the new allowance
        assert(_token.approve(_spender, _value));
    }

    // deprecated, backward compatibility
    function convertForPrioritized(
        IERC20Token[] _path,
        uint256 _amount,
        uint256 _minReturn,
        address _for,
        uint256 _block,
        uint256 _nonce,
        uint8 _v,
        bytes32 _r,
        bytes32 _s)
        public payable returns (uint256)
    {
        convertForPrioritized2(_path, _amount, _minReturn, _for, _block, _v, _r, _s);
    }
}

    Contract ABI  
[{"constant":false,"inputs":[{"name":"_token","type":"address"},{"name":"_register","type":"bool"}],"name":"registerEtherToken","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_signerAddress","type":"address"}],"name":"setSignerAddress","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_path","type":"address[]"},{"name":"_amount","type":"uint256"},{"name":"_minReturn","type":"uint256"},{"name":"_for","type":"address"},{"name":"_block","type":"uint256"},{"name":"_nonce","type":"uint256"},{"name":"_v","type":"uint8"},{"name":"_r","type":"bytes32"},{"name":"_s","type":"bytes32"}],"name":"convertForPrioritized","outputs":[{"name":"","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"signerAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_token","type":"address"},{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"withdrawTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_path","type":"address[]"},{"name":"_amount","type":"uint256"},{"name":"_minReturn","type":"uint256"},{"name":"_for","type":"address"},{"name":"_block","type":"uint256"},{"name":"_v","type":"uint8"},{"name":"_r","type":"bytes32"},{"name":"_s","type":"bytes32"}],"name":"convertForPrioritized2","outputs":[{"name":"","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"BANCOR_FORMULA","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"acceptOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"registry","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"etherTokens","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"CONTRACT_FEATURES","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"conversionHashes","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"BANCOR_NETWORK","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"CONVERTER_CONVERSION_WHITELIST","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"gasPriceLimit","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_path","type":"address[]"},{"name":"_amount","type":"uint256"},{"name":"_minReturn","type":"uint256"},{"name":"_for","type":"address"}],"name":"claimAndConvertFor","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_paths","type":"address[]"},{"name":"_pathStartIndex","type":"uint256[]"},{"name":"_amounts","type":"uint256[]"},{"name":"_minReturns","type":"uint256[]"},{"name":"_for","type":"address"}],"name":"convertForMultiple","outputs":[{"name":"","type":"uint256[]"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"_path","type":"address[]"},{"name":"_amount","type":"uint256"},{"name":"_minReturn","type":"uint256"}],"name":"claimAndConvert","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_path","type":"address[]"},{"name":"_amount","type":"uint256"},{"name":"_minReturn","type":"uint256"},{"name":"_for","type":"address"}],"name":"convertFor","outputs":[{"name":"","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"newOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_gasPriceLimit","type":"address"}],"name":"setGasPriceLimit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_path","type":"address[]"},{"name":"_amount","type":"uint256"},{"name":"_minReturn","type":"uint256"}],"name":"convert","outputs":[{"name":"","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"_registry","type":"address"}],"name":"setContractRegistry","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_registry","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_prevOwner","type":"address"},{"indexed":true,"name":"_newOwner","type":"address"}],"name":"OwnerUpdate","type":"event"}]

  Contract Creation Code Switch To Opcodes View
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    Constructor Arguments (ABI-encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000d1997064f0fef8748c1de9b5ba53468c548738b3

-----Decoded View---------------
Found 1 constructor arguments :
Arg [0] : 000000000000000000000000d1997064f0fef8748c1de9b5ba53468c548738b3


   Swarm Source:
bzzr://4f6b20481b8c9fb5a62ae9101cf319282a872cf90025919c686bed4661f05cbe

 

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