B.protocol is a multi-chain permissionless and decentralized backstop liquidity protocol that aims to bring more stability and increase capital efficiency to Defi lending protocols. B.protocol v2 was labeled as Backstop Automated Market Maker (B.AMM) and represents a fully autonomous smart contract optimized to handle big debt liquidations with smaller capital requirements. In the period when liquidations are not carried out, funds from the B.AMM pool generate yield on one of the Defi protocols.