In Uniswap, specifically in the context of the Uniswap V3 protocol, `feeData` represents the fee structure associated with trading a particular token pair in a liquidity pool. The `feeData` object typically includes the following properties:
- **buyFeeBps**: This represents the buy fee expressed in basis points. One basis point is equal to 0.01%, so if `buyFeeBps` is 30, that translates to a 0.30% fee on the buying trades within that token pair.