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| 1 | +pragma solidity 0.4.18; |
| 2 | + |
| 3 | +import "../ERC20Interface.sol"; |
| 4 | +import "../KyberReserveInterface.sol"; |
| 5 | +import "../Utils.sol"; |
| 6 | +import "../Withdrawable.sol"; |
| 7 | +import "../KyberNetworkProxyInterface.sol"; |
| 8 | + |
| 9 | +contract MaliciousReserve is KyberReserveInterface, Withdrawable, Utils { |
| 10 | + |
| 11 | + mapping(address => uint256) public buyTokenRates; |
| 12 | + mapping(address => uint256) public sellTokenRates; |
| 13 | + |
| 14 | + function MaliciousReserve() public {} |
| 15 | + |
| 16 | + function() public payable {} |
| 17 | + |
| 18 | + KyberNetworkProxyInterface public proxy; |
| 19 | + address public scammer; |
| 20 | + ERC20 public scamToken; |
| 21 | + |
| 22 | + uint public numRecursive = 1; |
| 23 | + |
| 24 | + function setRate( |
| 25 | + ERC20 token, |
| 26 | + uint256 buyRate, |
| 27 | + uint256 sellRate |
| 28 | + ) public { |
| 29 | + buyTokenRates[address(token)] = buyRate; |
| 30 | + sellTokenRates[address(token)] = sellRate; |
| 31 | + } |
| 32 | + |
| 33 | + function trade( |
| 34 | + ERC20 srcToken, |
| 35 | + uint256 srcAmount, |
| 36 | + ERC20 destToken, |
| 37 | + address destAddress, |
| 38 | + uint256 conversionRate, |
| 39 | + bool validate |
| 40 | + ) public payable returns (bool) { |
| 41 | + validate; |
| 42 | + |
| 43 | + if (srcToken == ETH_TOKEN_ADDRESS) { |
| 44 | + require(msg.value == srcAmount); |
| 45 | + } else { |
| 46 | + require(msg.value == 0); |
| 47 | + } |
| 48 | + |
| 49 | + uint256 srcDecimals = getDecimals(srcToken); |
| 50 | + uint256 destDecimals = getDecimals(destToken); |
| 51 | + uint256 destAmount = calcDstQty(srcAmount, srcDecimals, destDecimals, conversionRate); |
| 52 | + require(destAmount > 0); |
| 53 | + |
| 54 | + // collect src tokens |
| 55 | + if (srcToken != ETH_TOKEN_ADDRESS) { |
| 56 | + srcToken.transferFrom(msg.sender, address(this), srcAmount); |
| 57 | + } |
| 58 | + |
| 59 | + // send dest tokens |
| 60 | + if (destToken == ETH_TOKEN_ADDRESS) { |
| 61 | + destAddress.transfer(destAmount); |
| 62 | + } else { |
| 63 | + destToken.transfer(destAddress, destAmount); |
| 64 | + } |
| 65 | + |
| 66 | + if (numRecursive > 0) { |
| 67 | + --numRecursive; |
| 68 | + |
| 69 | + performTrade(); |
| 70 | + } |
| 71 | + |
| 72 | + return true; |
| 73 | + } |
| 74 | + |
| 75 | + function setKyberProxy(KyberNetworkProxyInterface _proxy) public { |
| 76 | + |
| 77 | + require(_proxy != address(0)); |
| 78 | + |
| 79 | + proxy = _proxy; |
| 80 | + } |
| 81 | + |
| 82 | + function performTrade() public { |
| 83 | + uint callValue = 1000; |
| 84 | + bytes memory hint; |
| 85 | + |
| 86 | + ERC20 srcToken = ERC20(ETH_TOKEN_ADDRESS); |
| 87 | + proxy.tradeWithHint.value(callValue)(srcToken, callValue, scamToken, scammer, |
| 88 | + (2 ** 255), 0, 0, hint); |
| 89 | + } |
| 90 | + |
| 91 | + function setDestAddress(address _scammer) public { |
| 92 | + require(_scammer != address(0)); |
| 93 | + scammer = _scammer; |
| 94 | + } |
| 95 | + |
| 96 | + function setDestToken (ERC20 _token) public { |
| 97 | + scamToken = _token; |
| 98 | + } |
| 99 | + |
| 100 | + function setNumRecursive(uint num) public { |
| 101 | + numRecursive = num; |
| 102 | + } |
| 103 | + |
| 104 | + function getConversionRate( |
| 105 | + ERC20 src, |
| 106 | + ERC20 dest, |
| 107 | + uint256 srcQty, |
| 108 | + uint256 blockNumber |
| 109 | + ) public view returns (uint256) { |
| 110 | + blockNumber; |
| 111 | + uint256 rate = (src == ETH_TOKEN_ADDRESS) |
| 112 | + ? buyTokenRates[address(dest)] |
| 113 | + : sellTokenRates[address(src)]; |
| 114 | + uint256 srcDecimals = getDecimals(src); |
| 115 | + uint256 destDecimals = getDecimals(dest); |
| 116 | + if (srcQty > MAX_QTY || rate > MAX_RATE ) { |
| 117 | + return 0; |
| 118 | + } |
| 119 | + uint256 destAmount = calcDstQty(srcQty, srcDecimals, destDecimals, rate); |
| 120 | + if (dest == ETH_TOKEN_ADDRESS && address(this).balance < destAmount) { |
| 121 | + return 0; |
| 122 | + } |
| 123 | + if (dest != ETH_TOKEN_ADDRESS && dest.balanceOf(address(this)) < destAmount) { |
| 124 | + return 0; |
| 125 | + } |
| 126 | + return rate; |
| 127 | + } |
| 128 | +} |
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