Introducing OP Kailua: Upgrade your OP chain into a ZK Rollup.
Santiago Campos-Araoz
We previously announced OP Kailua Hybrid Mode, a new option for teams looking to incorporate ZK into Fraud Proofs before moving to ZK Validity proofs.
Now, we’re proud to announce OP Kailua Validity Mode, allowing OP Rollups to complete this transition, evolving from Optimistic → Hybrid → Validity, all at their own pace.
Validity mode lets OP chains upgrade to a ZK Rollup instantly, eliminating disputes and providing the highest security with 1 hour finality.
Unmatched Security
Stronger guarantees than any other fault-proof mechanism. Safety requires only one honest sequencer, and liveness requires only sufficient proving power (e.g., via Boundless).
Permissionless sequencing is built-in, with a configurable “Vanguard” mode allowing an in-house proposer to have a head-start on sequencing rights to guarantee safety.
< 1 Hour Finality
Achieve settlement in under 1 hour, enabling capital-efficient applications that were previously impossible under 7-day challenge periods.
Cost-effective Today
Validity Mode is already economically viable for high-throughput chains today.
To demonstrate this, we analyzed a recent block range on Base, one of the most active OP Chains. The results show that Base can run OP Kailua in Validity Mode at production scale, with costs as low as $0.00012 per transaction:
If you’re interested in getting a cost estimate for your chain please fill out this form.
And a reminder of Hybrid Mode: The ZK Stepping Stone
Hybrid mode lets existing OP chains upgrade to ZK fraud proofs in just a few hours. With Hybrid mode, OP chains get:
Fast finality: Configurable down to 3 hours.
Fast dispute resolution: Disputes are settled with a single ZK Proof, replacing multi-round bisection games
Ultra-low collateral requirements: Orders of magnitude lower than standard OP chains (as low as $100) thanks to ZK proofs replacing multi-round challenges.
Predictable costs: Kailua gives a solid upper-bound for the cost of securing your rollup even under congestion with adaptive cutoffs and worst-case proving estimates
Immune to whale attacks: Fault proving costs are covered by the adversary’s collateral, preventing economic attacks.
The Easiest Way to Upgrade Your Rollup with ZK
Upgrade At Your Own Pace
Integrate OP Kailua without enabling withdrawals to test performance in a production-like environment
Submit validity proofs for only a portion of sequencing proposals before fully transitioning.
2. Flexible Security Settings: Switch freely between Hybrid mode and Validity mode based on your rollup’s needs.
3. High Degree of Liveness: Boundless integration offers improved liveness, so proof generation stays available when needed.
Rollups are integrating ZK with OP Kailua today
Rollups are already easily integrating ZK fraud or validity proofs with OP Kailua.
BOB: “With OP Kailua, BOB will become a Stage 1 rollup - initially with ZK fraud proofs and later with validity proofs. We will integrate Babylon-based Bitcoin finality proofs into the validity proofs, powering both BOB settlement on Ethereum as well as BitVM bridge operation.”
- Dom Harz , Co-founder at BOB
Eclipse: An Ethereum SVM L2 using OP Kailua’s dispute mechanism to easily add ZK fraud proofs for faster resolution.
ZK Finality Without the Switching Costs
Kailua makes full ZK finality accessible today, without requiring teams to rebuild their infrastructure, choose a new stack, or compromise on cost efficiency.
No disruptions to your rollup’s throughput
Configurable security settings tailored to your needs
Risk-free experimentation before committing
Incremental migration path from Optimistic to full Validity
OP Kailua is Ready for You
Your chain deserves ZK without the migration pain. OP Kailua makes it easy to integrate ZK Fraud Proofs or Validity Proofs on your OP Chain.
Upgrade today: Fill out this form and our team will help you get started.
Check out the documentation:
OP Kailua - ZK Fraud or Validity Proofs for your OP Chain.
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