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"source": "pragma solidity >=0.4.24;\n\nimport \"../TPSafeMath.sol\";\nimport \"./IExchangeAdapter.sol\";\nimport \"./Uniswap/UniswapExchangeInterface.sol\";\nimport \"./Uniswap/UniswapFactoryInterface.sol\";\n\ncontract UniswapAdapter is IExchangeAdapter {\n using TPSafeMath for uint;\n\n UniswapFactoryInterface public uniswapFactory;\n\n constructor(UniswapFactoryInterface _uniswapFactory) public {\n uniswapFactory = _uniswapFactory;\n }\n\n function getPriceForTokenPair(address token1, address token2)\n public\n view\n returns (uint price)\n {\n UniswapExchangeInterface token1Exchange = UniswapExchangeInterface(uniswapFactory.getExchange(token1));\n UniswapExchangeInterface token2Exchange = UniswapExchangeInterface(uniswapFactory.getExchange(token2));\n\n uint256 token1PriceEth = token1Exchange.getTokenToEthInputPrice(1 ether);\n uint256 token2PriceEth = token2Exchange.getTokenToEthInputPrice(1 ether);\n\n // calculate price in wei (price * 10 ** 18)\n price = (token1PriceEth.mul(1 ether)).div(token2PriceEth);\n }\n\n function tokenPairExists(address token1, address token2)\n public\n view\n returns (bool)\n {\n return\n uniswapFactory.getExchange(token1) != address(0) &&\n uniswapFactory.getExchange(token2) != address(0);\n }\n}\n", "sourcePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/ExchangeAdapters/UniswapAdapter.sol", "ast": { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/ExchangeAdapters/UniswapAdapter.sol", "exportedSymbols": { "UniswapAdapter": [ 1129 ] }, "id": 1130, "nodeType": "SourceUnit", "nodes": [ { "id": 1026, "literals": [ "solidity", ">=", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:25:6" }, { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/TPSafeMath.sol", "file": "../TPSafeMath.sol", "id": 1027, "nodeType": "ImportDirective", "scope": 1130, "sourceUnit": 1261, "src": "27:27:6", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/ExchangeAdapters/IExchangeAdapter.sol", "file": "./IExchangeAdapter.sol", "id": 1028, "nodeType": "ImportDirective", "scope": 1130, "sourceUnit": 641, "src": "55:32:6", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/ExchangeAdapters/Uniswap/UniswapExchangeInterface.sol", "file": "./Uniswap/UniswapExchangeInterface.sol", "id": 1029, "nodeType": "ImportDirective", "scope": 1130, "sourceUnit": 985, "src": "88:48:6", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/ExchangeAdapters/Uniswap/UniswapFactoryInterface.sol", "file": "./Uniswap/UniswapFactoryInterface.sol", "id": 1030, "nodeType": "ImportDirective", "scope": 1130, "sourceUnit": 1025, "src": "137:47:6", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 1031, "name": 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