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Cardano ⇄
CKB Bridge.
A bidirectional lock-and-mint bridge between Cardano and Nervos CKB — designed so a compromised committee still can't drain the peg.
Bridges get drained through correlated key custody, not clever maths. We built the safe baseline — a 3-of-5 committee with independent signers — then wrapped it in the defences that actually stop a drain: an optimistic challenge window, a permissionless fraud watchtower, caps and self-custody refunds.
On the CKB leg, committee authorisation is post-quantum: signatures are verified in-script with ML-DSA-44, so Shor's algorithm doesn't break the peg. Replay protection scales to O(1) via accumulator roots — a Sparse Merkle Tree on CKB, a Merkle Patricia Forestry on Cardano.
[ product shot — wide 21:9 ]
[ detail — 4:3 ]
[ detail — 4:3 ]
Each signer independently re-verifies the source event — a forged claim never reaches quorum, and one honest watchtower beats a fully colluding committee.
— From the threat model
Outcomes
The numbers.
4/4
Transfer directions live on testnet
ML-DSA
Post-quantum committee auth
1-of-N
Watchtower veto on fraud
Next project
Isomorphic Binding →