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Latest 25 from a total of 125 transactions
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Transfer | 6916928 | 1981 days ago | IN | 0 ETH | 0.00006425 | ||||
Transfer | 6526388 | 2045 days ago | IN | 0.30146768 ETH | 0.00013921 | ||||
Transfer | 6526378 | 2045 days ago | IN | 0.30194479 ETH | 0.00004711 | ||||
Transfer | 6526338 | 2045 days ago | IN | 0.30129972 ETH | 0.00013492 | ||||
List Pair For Re... | 6509241 | 2048 days ago | IN | 0 ETH | 0.00045241 | ||||
List Pair For Re... | 6475726 | 2054 days ago | IN | 0 ETH | 0.00177119 | ||||
List Pair For Re... | 6475721 | 2054 days ago | IN | 0 ETH | 0.00177685 | ||||
List Pair For Re... | 6475716 | 2054 days ago | IN | 0 ETH | 0.00177285 | ||||
List Pair For Re... | 6420162 | 2063 days ago | IN | 0 ETH | 0.00290163 | ||||
List Pair For Re... | 6417631 | 2063 days ago | IN | 0 ETH | 0.00246264 | ||||
Add Reserve | 6417624 | 2063 days ago | IN | 0 ETH | 0.00152033 | ||||
List Pair For Re... | 6402568 | 2066 days ago | IN | 0 ETH | 0.00177533 | ||||
Add Reserve | 6402562 | 2066 days ago | IN | 0 ETH | 0.00079636 | ||||
Transfer | 6379362 | 2069 days ago | IN | 0 ETH | 0.00008995 | ||||
List Pair For Re... | 6374152 | 2070 days ago | IN | 0 ETH | 0.00112592 | ||||
List Pair For Re... | 6374145 | 2070 days ago | IN | 0 ETH | 0.00118562 | ||||
List Pair For Re... | 6374128 | 2070 days ago | IN | 0 ETH | 0.00111498 | ||||
List Pair For Re... | 6329015 | 2078 days ago | IN | 0 ETH | 0.00218826 | ||||
List Pair For Re... | 6324560 | 2078 days ago | IN | 0 ETH | 0.00241663 | ||||
Add Reserve | 6324554 | 2078 days ago | IN | 0 ETH | 0.00108595 | ||||
List Pair For Re... | 6283784 | 2085 days ago | IN | 0 ETH | 0.00062922 | ||||
Trade | 6259323 | 2089 days ago | IN | 0 ETH | 0.00017088 | ||||
Trade | 6188180 | 2101 days ago | IN | 0.05 ETH | 0.00014336 | ||||
Trade | 6188169 | 2101 days ago | IN | 0.01 ETH | 0.00014336 | ||||
Trade | 6182522 | 2102 days ago | IN | 0 ETH | 0.00017088 |
Latest 25 internal transactions (View All)
Advanced mode:
Parent Transaction Hash | Block | From | To | Value | ||
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7018957 | 1964 days ago | 1.08 ETH | ||||
7018957 | 1964 days ago | 1.08 ETH | ||||
7018954 | 1964 days ago | 0.86 ETH | ||||
7018954 | 1964 days ago | 0.86 ETH | ||||
7018911 | 1964 days ago | 0.05 ETH | ||||
7018911 | 1964 days ago | 0.05 ETH | ||||
7018846 | 1964 days ago | 0.98972309 ETH | ||||
7018846 | 1964 days ago | 0.98972309 ETH | ||||
7018843 | 1964 days ago | 1.5721662 ETH | ||||
7018843 | 1964 days ago | 1.5721662 ETH | ||||
7018784 | 1964 days ago | 0.74979449 ETH | ||||
7018784 | 1964 days ago | 0.74979449 ETH | ||||
7018754 | 1964 days ago | 0.05121525 ETH | ||||
7018754 | 1964 days ago | 0.05121525 ETH | ||||
7018734 | 1964 days ago | 3 ETH | ||||
7018734 | 1964 days ago | 3 ETH | ||||
7018697 | 1964 days ago | 0.05852067 ETH | ||||
7018697 | 1964 days ago | 0.05852067 ETH | ||||
7018695 | 1964 days ago | 0.94689956 ETH | ||||
7018695 | 1964 days ago | 0.94689956 ETH | ||||
7018680 | 1964 days ago | 0.058816 ETH | ||||
7018680 | 1964 days ago | 0.058816 ETH | ||||
7018676 | 1964 days ago | 0.4 ETH | ||||
7018676 | 1964 days ago | 0.4 ETH | ||||
7018651 | 1964 days ago | 39.516 ETH |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0x706aBcE0...180a1Fe9C The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
KyberNetwork
Compiler Version
v0.4.18+commit.9cf6e910
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2018-07-03 */ 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/ExpectedRateInterface.sol interface ExpectedRateInterface { function getExpectedRate(ERC20 src, ERC20 dest, uint srcQty) public view returns (uint expectedRate, uint slippageRate); } // File: contracts/FeeBurnerInterface.sol interface FeeBurnerInterface { function handleFees (uint tradeWeiAmount, address reserve, address wallet) public returns(bool); } // 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/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/WhiteListInterface.sol contract WhiteListInterface { function getUserCapInWei(address user) external view returns (uint userCapWei); } // 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/KyberNetwork.sol //////////////////////////////////////////////////////////////////////////////////////////////////////// /// @title Kyber Network main contract contract KyberNetwork is Withdrawable, Utils2, KyberNetworkInterface { uint public negligibleRateDiff = 10; // basic rate steps will be in 0.01% KyberReserveInterface[] public reserves; mapping(address=>bool) public isReserve; 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 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(isReserve[msg.sender]); 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 payable returns(uint) { require(hint.length == 0); require(msg.sender == kyberNetworkProxyContract); 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 reserve, bool add); /// @notice can be called only by admin /// @dev add or deletes a reserve to/from the network. /// @param reserve The reserve address. /// @param add If true, the add reserve. Otherwise delete reserve. function addReserve(KyberReserveInterface reserve, bool add) public onlyAdmin { if (add) { require(!isReserve[reserve]); reserves.push(reserve); isReserve[reserve] = true; AddReserveToNetwork(reserve, true); } else { isReserve[reserve] = false; // will have trouble if more than 50k reserves... for (uint i = 0; i < reserves.length; i++) { if (reserves[i] == reserve) { reserves[i] = reserves[reserves.length - 1]; reserves.length--; AddReserveToNetwork(reserve, false); break; } } } } event ListReservePairs(address reserve, ERC20 src, ERC20 dest, bool add); /// @notice can be called only by admin /// @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 onlyAdmin { require(isReserve[reserve]); if (ethToToken) { listPairs(reserve, token, false, add); ListReservePairs(reserve, ETH_TOKEN_ADDRESS, token, add); } if (tokenToEth) { listPairs(reserve, token, true, add); if (add) { token.approve(reserve, 2**255); // approve infinity } else { token.approve(reserve, 0); } ListReservePairs(reserve, token, ETH_TOKEN_ADDRESS, add); } setDecimals(token); } function setWhiteList(WhiteListInterface whiteList) public onlyAdmin { require(whiteList != address(0)); whiteListContract = whiteList; } function setExpectedRate(ExpectedRateInterface expectedRate) public onlyAdmin { require(expectedRate != address(0)); expectedRateContract = expectedRate; } function setFeeBurner(FeeBurnerInterface feeBurner) public onlyAdmin { require(feeBurner != address(0)); feeBurnerContract = feeBurner; } function setParams( uint _maxGasPrice, uint _negligibleRateDiff ) public onlyAdmin { require(_negligibleRateDiff <= 100 * 100); // at most 100% maxGasPriceValue = _maxGasPrice; negligibleRateDiff = _negligibleRateDiff; } function setEnable(bool _enable) public onlyAdmin { if (_enable) { require(whiteListContract != address(0)); require(feeBurnerContract != address(0)); require(expectedRateContract != address(0)); require(kyberNetworkProxyContract != address(0)); } isEnabled = _enable; } 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 with as much gas as needed /// @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)); return expectedRateContract.getExpectedRate(src, dest, srcQty); } function getUserCapInWei(address user) public view returns(uint) { 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); 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 */ // Not sure how solhing defines complexity. Anyway, from our point of view, below code follows the required // algorithm to choose 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) 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; if (src == ETH_TOKEN_ADDRESS) { reserveArr = reservesPerTokenDest[dest]; } else { reserveArr = 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. 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 random = 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 random = uint(block.blockhash(block.number-1)) % numRelevantReserves; } bestReserve = reserveCandidates[random]; bestRate = rates[bestReserve]; } return (reserveArr[bestReserve], bestRate); } /* solhint-enable code-complexity */ function findBestRateTokenToToken(ERC20 src, ERC20 dest, uint srcAmount) internal view returns(BestRateResult result) { (result.reserve1, result.rateSrcToEth) = searchBestRate(src, ETH_TOKEN_ADDRESS, srcAmount); result.weiAmount = calcDestAmount(src, ETH_TOKEN_ADDRESS, srcAmount, result.rateSrcToEth); (result.reserve2, result.rateEthToDest) = searchBestRate(ETH_TOKEN_ADDRESS, dest, result.weiAmount); 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--; } } } if (add && i == reserveArr.length) { //if reserve wasn't found add it reserveArr.push(reserve); } } event KyberTrade(address srcAddress, ERC20 srcToken, uint srcAmount, address destAddress, ERC20 destToken, uint destAmount); /* solhint-disable function-max-lines */ // Most of the lins here are functions calls spread over multiple lines. We find this function readable enough // and keep its size as is. /// @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); 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); if (actualSrcAmount < tradeInput.srcAmount) { //if there is "change" send back to trader if (tradeInput.src == ETH_TOKEN_ADDRESS) { tradeInput.trader.transfer(tradeInput.srcAmount - actualSrcAmount); } else { tradeInput.src.transfer(tradeInput.trader, (tradeInput.srcAmount - actualSrcAmount)); } } // verify trade size is smaller than user cap require(weiAmount <= getUserCapInWei(tradeInput.trader)); //do the trade //src to ETH require(doReserveTrade( tradeInput.src, actualSrcAmount, ETH_TOKEN_ADDRESS, this, weiAmount, KyberReserveInterface(rateResult.reserve1), rateResult.rateSrcToEth, true)); //Eth to dest require(doReserveTrade( ETH_TOKEN_ADDRESS, weiAmount, tradeInput.dest, tradeInput.destAddress, actualDestAmount, KyberReserveInterface(rateResult.reserve2), rateResult.rateEthToDest, true)); //when src is ether, reserve1 is doing a "fake" trade. (ether to ether) - don't burn. //when dest is ether, reserve2 is doing a "fake" trade. (ether to ether) - don't burn. if (tradeInput.src != ETH_TOKEN_ADDRESS) require(feeBurnerContract.handleFees(weiAmount, rateResult.reserve1, tradeInput.walletId)); if (tradeInput.dest != ETH_TOKEN_ADDRESS) require(feeBurnerContract.handleFees(weiAmount, rateResult.reserve2, tradeInput.walletId)); KyberTrade(tradeInput.trader, tradeInput.src, actualSrcAmount, tradeInput.destAddress, tradeInput.dest, actualDestAmount); 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; } /// @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; } }
Contract Security Audit
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Deployed Bytecode
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Swarm Source
bzzr://0ebb6394511d39240f4382d855a94d1ea997fa45b61ef594b2067d48904c0fe6
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.