Cardinal Protocol: Trust-Minimized Bitcoin DeFi on Cardano
Summary
The document explains how Cardinal aims to make Bitcoin assets usable in Cardano DeFi while keeping their link to Bitcoin. It describes locking Bitcoin UTXOs with MuSig2, representing them on Cardano as provenance-preserving NFTs, and using BitVMX to support fraud proofs if operators misbehave. The stated applications include AMM liquidity, lending, borrowing, and using Ordinals as collateral or tradable assets.
Its central design argument is that Cardano’s eUTXO model resembles Bitcoin’s UTXO structure, which may simplify proofs for a symmetric peg. The document contrasts this approach with custodial or federated wrapped-Bitcoin systems and says deterministic Cardano transaction costs may improve predictability. It offers no independent technical evaluation or measured security results. It also notes that the protocol is not yet a finished consumer product: proof generation, scaling, wallet usability, liquidity, and independent review of MuSig2 and operator rotation remain open concerns.
Key ideas
- Cardinal proposes locking Bitcoin UTXOs with MuSig2 and representing them as NFTs on Cardano.
- BitVMX is described as a way to publish fraud proofs against operator misconduct.
- Wrapped Ordinals are intended to preserve provenance for DeFi uses such as trading and collateral.
- The document identifies proof generation, scalability, audits, wallet experience, and liquidity as unresolved issues.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.