@valueswap/v2-periphery

{ "contractName": "ValueswapV2OracleLibrary", "abi": [], "metadata": 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"bytecode": "0x60566023600b82828239805160001a607314601657fe5b30600052607381538281f3fe73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220f5d24d3bbc827c308c4533ee3c1295ba4fc360a66888c546a14fae741af46ba364736f6c63430006060033", "deployedBytecode": "0x73000000000000000000000000000000000000000030146080604052600080fdfea2646970667358221220f5d24d3bbc827c308c4533ee3c1295ba4fc360a66888c546a14fae741af46ba364736f6c63430006060033", "immutableReferences": {}, "sourceMap": "250:1452:17:-:0;;132:2:-1;166:7;155:9;146:7;137:37;255:7;249:14;246:1;241:23;235:4;232:33;222:2;;269:9;222:2;293:9;290:1;283:20;323:4;314:7;306:22;347:7;338;331:24", "deployedSourceMap": "250:1452:17:-:0;;;;;;12:1:-1;9;2:12", "source": "pragma solidity >=0.5.0;\n\nimport '@valueswap/v2-core/contracts/interfaces/IValueswapV2Pair.sol';\nimport '@valueswap/lib/contracts/libraries/FixedPoint.sol';\n\n// library with helper methods for oracles that are concerned with computing average prices\nlibrary ValueswapV2OracleLibrary {\n using FixedPoint for *;\n\n // helper function that returns the current block timestamp within the range of uint32, i.e. [0, 2**32 - 1]\n function currentBlockTimestamp() internal view returns (uint32) {\n return uint32(block.timestamp % 2 ** 32);\n }\n\n // produces the cumulative price using counterfactuals to save gas and avoid a call to sync.\n function currentCumulativePrices(\n address pair\n ) internal view returns (uint price0Cumulative, uint price1Cumulative, uint32 blockTimestamp) {\n blockTimestamp = currentBlockTimestamp();\n price0Cumulative = IValueswapV2Pair(pair).price0CumulativeLast();\n price1Cumulative = IValueswapV2Pair(pair).price1CumulativeLast();\n\n // if time has elapsed since the last update on the pair, mock the accumulated price values\n (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) = IValueswapV2Pair(pair).getReserves();\n if (blockTimestampLast != blockTimestamp) {\n // subtraction overflow is desired\n uint32 timeElapsed = blockTimestamp - blockTimestampLast;\n // addition overflow is desired\n // counterfactual\n price0Cumulative += uint(FixedPoint.fraction(reserve1, reserve0)._x) * timeElapsed;\n // counterfactual\n price1Cumulative += uint(FixedPoint.fraction(reserve0, reserve1)._x) * timeElapsed;\n }\n }\n}\n", "sourcePath": "/Users/second/Documents/work/valueswap-v2-periphery/contracts/libraries/ValueswapV2OracleLibrary.sol", "ast": { "absolutePath": "/Users/second/Documents/work/valueswap-v2-periphery/contracts/libraries/ValueswapV2OracleLibrary.sol", "exportedSymbols": { "ValueswapV2OracleLibrary": [ 6160 ] }, "id": 6161, "nodeType": "SourceUnit", "nodes": [ { "id": 6055, "literals": [ "solidity", ">=", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:24:17" }, { "absolutePath": "@valueswap/v2-core/contracts/interfaces/IValueswapV2Pair.sol", "file": "@valueswap/v2-core/contracts/interfaces/IValueswapV2Pair.sol", "id": 6056, "nodeType": "ImportDirective", "scope": 6161, "sourceUnit": 9359, "src": "26:70:17", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "@valueswap/lib/contracts/libraries/FixedPoint.sol", "file": "@valueswap/lib/contracts/libraries/FixedPoint.sol", "id": 6057, "nodeType": "ImportDirective", "scope": 6161, "sourceUnit": 8659, "src": "97:59:17", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [], "contractDependencies": [], "contractKind": "library", "documentation": null, "fullyImplemented": true, "id": 6160, "linearizedBaseContracts": [ 6160 ], "name": "ValueswapV2OracleLibrary", "nodeType": "ContractDefinition", "nodes": [ { "id": 6059, "libraryName": { "contractScope": null, "id": 6058, "name": "FixedPoint", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 8658, "src": "295:10:17", "typeDescriptions": { "typeIdentifier": "t_contract$_FixedPoint_$8658", "typeString": "library FixedPoint" } }, "nodeType": "UsingForDirective", "src": "289:23:17", "typeName": null }, { "body": { "id": 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