Some helper functions are omitted for brevity.
MarketData
struct MarketData {
    Header header;
    FeeData feeData;
}

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updateFeeDataAfterTrade

updateFeeDataAfterTrade
function updateFeeDataAfterTrade(
    MarketData storage self, 
    uint256 quoteTokenTraded
) internal returns (uint256 feeAmount)
Updates the fee data in the market after a trade by calculating the fee amount based on the amount of quote token traded and adding it to both the total and unclaimed quote token fees.

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getFactory

getFactory
function getFactory(
    MarketData storage self
) internal view returns (address)
Retrieves the address of the factory associated with the market data.

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getFactoryOwner

getFactoryOwner
function getFactoryOwner(
    MarketData storage self
) internal view returns (address)
Retrieves the owner address of the factory associated with the market data.

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getFeeRecipient

getFeeRecipient
function getFeeRecipient(
    MarketData storage self
) internal view returns (address)
Retrieves the address of the fee recipient from the factory associated with the market data.