Notional Finance is a fixed-rate lending protocol built on Ethereum. It integrates the Compound protocol, drawing inspiration from the traditional financial model of zero-coupon bonds. The introduction of the fCash token represents claims to future positive or negative cash flows at specific times. The overall product design is commendable. Currently, the team is diligently working on updates and iterations, aiming to expand the product features, enhance the user experience, and eagerly anticipating the launch of the v3 version.