{
    "Function": "update",
    "File": "contracts/twap/TwapOracle.sol",
    "Parent Contracts": [
        "node_modules/@openzeppelin/contracts/access/Ownable.sol",
        "node_modules/@openzeppelin/contracts/utils/Context.sol"
    ],
    "High-Level Calls": [
        "UniswapV2OracleLibrary",
        "IVaderPoolV2"
    ],
    "Internal Calls": [
        "require(bool,string)",
        "initialized",
        "onlyOwner"
    ],
    "Library Calls": [
        "currentCumulativePrices"
    ],
    "Low-Level Calls": [],
    "Code": "function update() external onlyOwner initialized {\n        uint256 pairCount = _pairs.length;\n\n        // Update all of the registered pairs in the TWAP oracle.\n        for (uint256 i = 0; i < pairCount; i++) {\n            PairData storage pairData = _pairs[i];\n\n            // Get the current cumulative prices and block timestamp of the current pairing.\n            (\n                uint256 price0Cumulative,\n                uint256 price1Cumulative,\n                uint32 blockTimestamp\n            ) = (pairData.token0 == VADER)\n                    ? UniswapV2OracleLibrary.currentCumulativePrices(\n                        pairData.pair\n                    )\n                    : _vaderPool.cumulativePrices(IERC20(pairData.token1));\n\n            unchecked {\n                // Ensure that at least one full period has passed since the pairing was last update.\n                uint32 timeElapsed = blockTimestamp -\n                    pairData.blockTimestampLast;\n                require(\n                    timeElapsed >= _updatePeriod,\n                    \"TwapOracle::update: Period not elapsed\"\n                );\n\n                // Cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed.\n                pairData.price0Average = FixedPoint.uq112x112(\n                    uint224(\n                        (price0Cumulative - pairData.price0CumulativeLast) /\n                            timeElapsed\n                    )\n                );\n                pairData.price1Average = FixedPoint.uq112x112(\n                    uint224(\n                        (price1Cumulative - pairData.price1CumulativeLast) /\n                            timeElapsed\n                    )\n                );\n            }\n\n            // Update the stored pairing data\n            pairData.price0CumulativeLast = price0Cumulative;\n            pairData.price1CumulativeLast = price1Cumulative;\n            pairData.blockTimestampLast = blockTimestamp;\n        }\n    }"
}