{
    "Function": "settleFunding",
    "File": "contracts/AMM.sol",
    "Parent Contracts": [
        "contracts/legos/Governable.sol",
        "node_modules/@openzeppelin/contracts/proxy/utils/Initializable.sol",
        "contracts/legos/Governable.sol",
        "contracts/Interfaces.sol"
    ],
    "High-Level Calls": [],
    "Internal Calls": [
        "getUnderlyingTwapPrice",
        "getTwapPrice",
        "_updateFundingRate",
        "_blockTimestamp",
        "require(bool,string)",
        "_blockTimestamp",
        "onlyClearingHouse"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function settleFunding()\n        override\n        external\n        onlyClearingHouse\n    {\n        if (ammState != AMMState.Active) return;\n        require(_blockTimestamp() >= nextFundingTime, \"settle funding too early\");\n\n        // premium = twapMarketPrice - twapIndexPrice\n        // timeFraction = fundingPeriod(1 hour) / 1 day\n        // premiumFraction = premium * timeFraction\n        int256 underlyingPrice = getUnderlyingTwapPrice(spotPriceTwapInterval);\n        int256 premium = getTwapPrice(spotPriceTwapInterval) - underlyingPrice;\n        int256 premiumFraction = (premium * int256(fundingPeriod)) / 1 days;\n\n        // update funding rate = premiumFraction / twapIndexPrice\n        _updateFundingRate(premiumFraction, underlyingPrice);\n\n        int256 premiumPerDtoken = posAccumulator * premiumFraction;\n\n        // makers pay slightly more to account for rounding off\n        premiumPerDtoken = (premiumPerDtoken / BASE_PRECISION) + 1;\n\n        cumulativePremiumFraction += premiumFraction;\n        cumulativePremiumPerDtoken += premiumPerDtoken;\n\n        // Updates for next funding event\n        // in order to prevent multiple funding settlement during very short time after network congestion\n        uint256 minNextValidFundingTime = _blockTimestamp() + fundingBufferPeriod;\n\n        // floor((nextFundingTime + fundingPeriod) / 3600) * 3600\n        uint256 nextFundingTimeOnHourStart = ((nextFundingTime + fundingPeriod) / 1 hours) * 1 hours;\n\n        // max(nextFundingTimeOnHourStart, minNextValidFundingTime)\n        nextFundingTime = nextFundingTimeOnHourStart > minNextValidFundingTime\n            ? nextFundingTimeOnHourStart\n            : minNextValidFundingTime;\n    }"
}