For an RFQ order, the fees include the base fee and the percentage fee, all paid in the source token.
Base Fees: used to cover gas costs and the message passing fees. Base fees are charged by either market maker or relayer(Peti protocol).
Percentage Fees: proportional to the swap amount. A part of the percentage fee is collected by the market maker whose fee percentage may be different for different market makers. The other part of the percentage fee is collected by the Peti protocol.