{
    "Function": "_updateRewardPerToken",
    "File": "contracts/contracts/Gauge.sol",
    "Parent Contracts": [],
    "High-Level Calls": [
        "Math"
    ],
    "Internal Calls": [
        "_calcRewardPerToken",
        "_writeRewardPerTokenCheckpoint",
        "lastTimeRewardApplicable",
        "getPriorSupplyIndex",
        "_writeRewardPerTokenCheckpoint",
        "_calcRewardPerToken"
    ],
    "Library Calls": [
        "max"
    ],
    "Low-Level Calls": [],
    "Code": "function _updateRewardPerToken(address token) internal returns (uint, uint) {\n        uint _startTimestamp = lastUpdateTime[token];\n        uint reward = rewardPerTokenStored[token];\n\n        if (supplyNumCheckpoints == 0) {\n            return (reward, _startTimestamp);\n        }\n\n        if (rewardRate[token] == 0) {\n            return (reward, block.timestamp);\n        }\n\n        uint _startIndex = getPriorSupplyIndex(_startTimestamp);\n        uint _endIndex = supplyNumCheckpoints-1;\n\n        if (_endIndex > 0) {\n            for (uint i = _startIndex; i < _endIndex; i++) {\n                SupplyCheckpoint memory sp0 = supplyCheckpoints[i];\n                if (sp0.supply > 0) {\n                    SupplyCheckpoint memory sp1 = supplyCheckpoints[i+1];\n                    (uint _reward, uint _endTime) = _calcRewardPerToken(token, sp1.timestamp, sp0.timestamp, sp0.supply, _startTimestamp);\n                    reward += _reward;\n                    _writeRewardPerTokenCheckpoint(token, reward, _endTime);\n                    _startTimestamp = _endTime;\n                }\n            }\n        }\n\n        SupplyCheckpoint memory sp = supplyCheckpoints[_endIndex];\n        if (sp.supply > 0) {\n            (uint _reward,) = _calcRewardPerToken(token, lastTimeRewardApplicable(token), Math.max(sp.timestamp, _startTimestamp), sp.supply, _startTimestamp);\n            reward += _reward;\n            _writeRewardPerTokenCheckpoint(token, reward, block.timestamp);\n            _startTimestamp = block.timestamp;\n        }\n\n        return (reward, _startTimestamp);\n    }"
}