{
    "Function": "_castVote",
    "File": "contracts/governance/GovernorAlpha.sol",
    "Parent Contracts": [],
    "High-Level Calls": [
        "IXVader"
    ],
    "Internal Calls": [
        "state",
        "require(bool,string)",
        "require(bool,string)"
    ],
    "Library Calls": [],
    "Low-Level Calls": [],
    "Code": "function _castVote(\n        address voter,\n        uint256 proposalId,\n        bool support\n    ) internal {\n        require(\n            state(proposalId) == ProposalState.Active,\n            \"GovernorAlpha::_castVote: voting is closed\"\n        );\n\n        Proposal storage proposal = proposals[proposalId];\n        Receipt storage receipt = proposal.receipts[voter];\n\n        require(\n            !receipt.hasVoted,\n            \"GovernorAlpha::_castVote: voter already voted\"\n        );\n\n        // optimistically casting to uint224 as xVader contract performs the checks for\n        // votes to not overflow uint224.\n        uint224 votes = uint224(\n            xVader.getPastVotes(voter, proposal.startBlock)\n        );\n\n        // C4-Audit Fix for Issue # 177\n        unchecked {\n            if (support) {\n                proposal.forVotes = proposal.forVotes + votes;\n            } else {\n                proposal.againstVotes = proposal.againstVotes + votes;\n            }\n        }\n\n        receipt.hasVoted = true;\n        receipt.support = support;\n        receipt.votes = votes;\n\n        emit VoteCast(voter, proposalId, support, votes);\n    }"
}