Using Bitcoin as collateral without wrapping it: the design of a BTC collateral vault
A new design for a Bitcoin collateral vault proposes a method for using BTC as collateral without needing to wrap it into a token on another blockchain. This approach keeps the Bitcoin on its native chain, locked in a hash-time-lock contract, and uses the preimage of a hash as the key to resolve obligations on a secondary chain like Sui. This design aims to avoid the custodial risks and honeypot vulnerabilities associated with wrapped Bitcoin, ensuring collateral integrity is maintained through Bitcoin consensus rather than third-party custodians. AI