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"source": "pragma solidity >=0.4.24;\n\nimport \"tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol\";\nimport \"../ExchangeAdapters/IExchangeAdapter.sol\";\n\ncontract TokenPriceDataFeed is DataFeedOracleBase {\n address public token1;\n address public token2;\n IExchangeAdapter public exchangeAdapter;\n\n function initialize(\n address _token1,\n address _token2,\n IExchangeAdapter _exchangeAdapter\n )\n public\n {\n token1 = _token1;\n token2 = _token2;\n exchangeAdapter = _exchangeAdapter;\n\n // set dataSource to `this` so setResult can only be called from this contract\n DataFeedOracleBase.initialize(address(this));\n }\n\n function logResult() public {\n uint price = exchangeAdapter.getPriceForTokenPair(token1, token2);\n DataFeedOracleBase(this).setResult(bytes32(price), uint256(block.timestamp));\n }\n}\n", "sourcePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/DataFeeds/TokenPriceDataFeed.sol", "ast": { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/DataFeeds/TokenPriceDataFeed.sol", "exportedSymbols": { "TokenPriceDataFeed": [ 482 ] }, "id": 483, "nodeType": "SourceUnit", "nodes": [ { "id": 416, "literals": [ "solidity", ">=", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:25:1" }, { "absolutePath": "tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol", "file": "tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol", "id": 417, "nodeType": "ImportDirective", "scope": 483, "sourceUnit": 1377, "src": "27:65:1", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/mfcalvanese/dev/eth/token-price-oracles/contracts/ExchangeAdapters/IExchangeAdapter.sol", "file": "../ExchangeAdapters/IExchangeAdapter.sol", "id": 418, "nodeType": "ImportDirective", "scope": 483, "sourceUnit": 495, "src": "93:50:1", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 419, "name": "DataFeedOracleBase", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1376, "src": "176:18:1", "typeDescriptions": { "typeIdentifier": "t_contract$_DataFeedOracleBase_$1376", "typeString": "contract DataFeedOracleBase" } }, "id": 420, "nodeType": "InheritanceSpecifier", "src": "176:18:1" } ], "contractDependencies": [ 1376, 1426, 1489 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 482, "linearizedBaseContracts": [ 482, 1376, 1426, 1489 ], "name": "TokenPriceDataFeed", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 422, "name": "token1", "nodeType": "VariableDeclaration", "scope": 482, "src": "199:21:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 421, "name": "address", "nodeType": "ElementaryTypeName", "src": "199:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 424, "name": "token2", "nodeType": "VariableDeclaration", "scope": 482, "src": "224:21:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 423, "name": "address", "nodeType": "ElementaryTypeName", "src": "224:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 426, "name": "exchangeAdapter", "nodeType": "VariableDeclaration", "scope": 482, "src": "249:39:1", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_IExchangeAdapter_$494", "typeString": "contract IExchangeAdapter" }, "typeName": { "contractScope": null, "id": 425, "name": "IExchangeAdapter", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 494, "src": "249:16:1", "typeDescriptions": { "typeIdentifier": "t_contract$_IExchangeAdapter_$494", "typeString": "contract IExchangeAdapter" } }, "value": null, "visibility": "public" }, { "body": { "id": 455, "nodeType": "Block", "src": "411:223:1", "statements": [ { "expression": { "argumentTypes": null, "id": 437, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 435, "name": "token1", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 422, "src": "417:6:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 436, "name": "_token1", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 428, "src": "426:7:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "src": "417:16:1", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": 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"typeString": "address" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" } ], "expression": { "argumentTypes": null, "id": 447, "name": "DataFeedOracleBase", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1376, "src": "585:18:1", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_DataFeedOracleBase_$1376_$", "typeString": "type(contract DataFeedOracleBase)" } }, "id": 449, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "initialize", "nodeType": "MemberAccess", "referencedDeclaration": 1166, "src": "585:29:1", "typeDescriptions": { "typeIdentifier": "t_function_internal_nonpayable$_t_address_$returns$__$", "typeString": "function (address)" } }, "id": 453, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "585:44:1", "typeDescriptions": { 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