FilFi is a liquidity protocol based on Filecoin, that enables Filecoin holders to pledge their FILs to the platform for a corresponding share of the token. In turn, those service providers who own nodes can put their own arithmetic into the pool and lend their arithmetic NFTs to enable the lending of FIL. In this way, builders can earn stable revenue by pledging FIL, while node holders are able to leverage their own arithmetic to add additional revenue. This mutually beneficial model promotes the liquidity of Filecoin assets while creating more value for participants.