Latest 25 transactions from a total of 55 transactions

TxHash Age From To Value [TxFee]
0xb2cb168f3d1371ae1410e90fb3bd130cb3be0bb497c4224adc097161d81d5c032 days 38 mins ago0xb6bf1b11b1d12d75ea1b9848543e22f6a974acad  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00039618
0x721a432988eed2185428af6c715c4a986bd7e34e8788d7dd4d5253e4c480a2f34 days 4 hrs ago0xb6bf1b11b1d12d75ea1b9848543e22f6a974acad  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00139111
0x0bd94746d30e1e30e06e9931ea4d87b251138216c615eda17687afb718f796644 days 5 hrs ago0xb6bf1b11b1d12d75ea1b9848543e22f6a974acad  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00139111
0x0219829a7f4d68ec29272dd905fe3fa91444743b5ad3e6df01de11114fcd96935 days 54 mins ago0xb6bf1b11b1d12d75ea1b9848543e22f6a974acad  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00119238
0xb928840e7205a8cfbeb03406c6884c24b4ce2a1698c2a6c8a70d674a4506edde5 days 56 mins ago0xb6bf1b11b1d12d75ea1b9848543e22f6a974acad  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00068144
0xbde91f27db29073ecee8b8740abe208117e94a1019fd3863a20a3cee8493c44d5 days 1 hr ago0xb6bf1b11b1d12d75ea1b9848543e22f6a974acad  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00034072
0xd3dd0681717e824f575b1c845b6f22f1ab8ac0cc1b57dc66795c5e24f5365ffe15 days 2 mins ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a1.5 Ether0.000182778
0x78ebde0c60cf62e32ecb0afcd3c5bd4306dfe38002e812a579c8a0a6a3bbe32315 days 10 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.9 Ether0.000183162
0xb49c516be1e5f600e1114a29f9e3171c4462ab97aec0927aca81d93292ddf73815 days 11 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.3 Ether0.000183162
0x489cae734fa7856a438c433ac4a7b524992c008b41519f1f83bef0ac023ee5af15 days 11 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.3 Ether0.000182778
0x6591cfd5d1c26691969174d4eea19c589754e46b0c920f75e6ed52e91ceccbe628 days 16 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.0001 Ether0.001412305
0x6fbf7722b8037f3351eb6a802a45777f67ccd6ca197acc99cb20497f82f3604b30 days 11 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.2 Ether0.00035391
0x1d07e6d41f80e9b1b42394cbbe647435b70e3322a5d7e8f640a84de8fd7bd67332 days 5 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.0001 Ether0.00299805
0xd16a96333a9a4126b12ce836c24604c2645b9c6830ac8642365851ff400a288132 days 6 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.0011 Ether0.00035263
0x09c0a8aedc240851c9d08814456f1977708d8137010c00e93a08987676e77f2932 days 7 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.009918048
0x4ec053de1414c63960bfd92abfff751b049241adc312fce563c164568296fb4332 days 7 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.009918048
0xbcb80ed1343b84f2cd35dde27a331772866e27909616b22de9a9e09c8c1c684e32 days 7 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.009918048
0xb3e37e765a23073984fb63dfa02f96e7d9927ad11097b6f2e1e15e65b07b6cd832 days 7 hrs ago0x24ab3529abfbb299159451037b9b07b54b18404c  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.0001 Ether0.003579756
0x86663a204537def0797a9d046f6c2cc7164a4143ef3ada8f52fbf8006f06629748 days 10 hrs ago0xae2fc79e13a14ec68901b5ed7c4662a02b0b45ee  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.00971849
0x1cc8a8d3a4291a556411b248e045834093ed35748ab5c0b3c5b81b412947e97f78 days 10 hrs ago0x951ce9fd4fb6389a195f513a17a92d125d8d14a7  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.026833332
0xc08702099bd1a6c362bb7b5ea2c90db43f2d1c2d51fd2b4c257f86933c595c0f81 days 2 hrs ago0x951ce9fd4fb6389a195f513a17a92d125d8d14a7  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0 Ether0.0003347
0x6ae0b55e73af9eba2da8a7ba36476c8565f4fa1671b818139a16360c941c4abd102 days 8 hrs ago0x787b7c484fba6237dc156f9551c0bc804570c1d9  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.002957950096883 Ether0.000850605
0x375417ab64c4a32c8a1b3bd6408f0ee47fda41bf6acda51cdda91d427715b653102 days 8 hrs ago0x787b7c484fba6237dc156f9551c0bc804570c1d9  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.002957948814926 Ether0.000894261
0xc59606802910a2223560f7b07030bccbe0d7e6bcd97e24c90f325316723488f0102 days 8 hrs ago0x787b7c484fba6237dc156f9551c0bc804570c1d9  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.002957948814927 Ether0.000682899
0x519b4bcdf36a7a7b178b2c6cd342d3e98d085a2071cea75f0606a7e5c7442c9b102 days 8 hrs ago0x787b7c484fba6237dc156f9551c0bc804570c1d9  IN   0xf20b9e713a33f61fa38792d2afaf1cd30339126a0.002959644493735 Ether0.00051513
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 Internal Transactions as a result of Contract Execution
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0x7b1d562cbae9474a1ecc7e68f7335e2fa8292a64ba6339e8c13efc66b0825ff26857501 57 secs ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151 Ether
0x7b1d562cbae9474a1ecc7e68f7335e2fa8292a64ba6339e8c13efc66b0825ff26857501 57 secs ago0xb89570f6ad742cb1fd440a930d6c2a2ea29c51ee0xf20b9e713a33f61fa38792d2afaf1cd30339126a1 Ether
0x22817e28586c1424410b157d3d3f5b9d4ca5abd7a534b8454797ffb8fafbd69d68574971 min ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151 Ether
0x22817e28586c1424410b157d3d3f5b9d4ca5abd7a534b8454797ffb8fafbd69d68574971 min ago0xb89570f6ad742cb1fd440a930d6c2a2ea29c51ee0xf20b9e713a33f61fa38792d2afaf1cd30339126a1 Ether
0x20f22e3ecee19b7a0df18e6eb02a8d11715f39b985f8fe24ebdc21c21d34e5d968574961 min ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151.159415397526829353 Ether
0x20f22e3ecee19b7a0df18e6eb02a8d11715f39b985f8fe24ebdc21c21d34e5d968574961 min ago0x9dc00f635e802dbcd13e56613fd24b2bd83106e00xf20b9e713a33f61fa38792d2afaf1cd30339126a1.159415397526829353 Ether
0xab10268af9971c8fd60660dfd7e9d52b60f78b4cd9ade982e3e979530c3a1fa068574835 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151.3 Ether
0xab10268af9971c8fd60660dfd7e9d52b60f78b4cd9ade982e3e979530c3a1fa068574835 mins ago0xb89570f6ad742cb1fd440a930d6c2a2ea29c51ee0xf20b9e713a33f61fa38792d2afaf1cd30339126a1.3 Ether
0x43c9b8ba06061880c392fd63f802df4cf2db7e9de1013b450bcc205d4530bd1468574815 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151.2 Ether
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0x972f97bc8467a6921c352dab50c90256333ff090d1ad6b5e3ba19b49d5392e3768574815 mins ago0xf20b9e713a33f61fa38792d2afaf1cd30339126a0xc0829421c1d260bd3cb3e0f06cfe2d52db2ce3151.2856 Ether
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Warning: The Compiled Contract might be susceptible to ExpExponentCleanup (medium/high-severity), EventStructWrongData (very low-severity), NestedArrayFunctionCallDecoder (medium-severity) SolidityCompiler Bugs.

Contract Source Code Verified (Exact Match)
Contract Name: BancorNetwork
Compiler Text: 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

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000d1997064f0fef8748c1de9b5ba53468c548738b3


   Swarm Source:
bzzr://4f6b20481b8c9fb5a62ae9101cf319282a872cf90025919c686bed4661f05cbe

 

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