SUBFROST is a Bitcoin-native decentralized finance (DeFi) protocol built on the Alkanes metaprotocol. It enables users to swap BTC for assets like DIESEL and FIRE, access on-chain liquidity, and use programmable Bitcoin-based applications without moving to a separate blockchain. Its protocol includes automated market makers, liquidity pools, and frBTC, a Bitcoin-backed asset designed to bring BTC into DeFi.