The ability to lend and borrow assets efficiently is a crucial feature of any financial system. In the world of traditional finance, this process is typically facilitated by trusted and permissioned third-parties such as banks, who connect people with a surplus of money to those who need access to it in the short term. In the world of decentralised finance (DeFi), trusted and permissioned third-parties are no longer needed; banks have been replaced by trustless and permissionless lending protocols running on the blockchain (1).