Case Study
Discover Bluefin's blueprint for verifiable trading
Creating fast, verifiable DeFi data with public proof — powered by Walrus.
For years, DeFi has faced an impossible trade-off: speed or decentralization. Blockchains provide secure custody and settlement, but they are not optimized for millisecond-level order matching. Even sub-second block times introduce enough latency to kill market-maker risk tolerance.
Bluefin, a decentralized financial ecosystem that has processed over $50B in trading volume, is rebuilding the exchange from the ground up with the introduction of Bluefin Pro, which will use Walrus to drive millisecond execution, non-custodial funds, and a fully verifiable audit trail.
DeFi got faster-but verification got harder
While offchain execution solves the speed problem, it creates a new one. Users must trust the operator to execute fairly and publish accurate results. Most offchain systems store execution history inside the operator's own infrastructure. If something goes wrong, users have no independent way to check.
Onchain custody meets verifiable execution
Bluefin Pro separates three things that were previously bundled together: custody, execution, and verification. Custody and settlement stay onchain. Order matching moves offchain into a Trusted Execution Environment powered by Nautilus. And every action (open order, cancel, match) is logged to Walrus in real time.
Checkpoints are published every few seconds, allowing validators to efficiently sync and verify orderbook state without replaying the entire history. Code binaries will be fully open-source. Anyone running Bluefin's matching engine can reproduce the orderbook state and produce the same attestations independently.
How it works
Deposit Onchain
Users deposit into non-custodial Sui smart contracts. Funds stay under user control throughout.
Match Offchain
Order matching occurs inside a TEE powered by Nautilus. Every action produces a cryptographic attestation, published to Walrus in real time.
Settle & Verify
Only final balance changes go onchain. Full execution history lives on Walrus that anyone can verify. No permission needed.
$50B in volume: now verifiable
Bluefin has processed over $50B in trading volume since launching on Sui in Q4 2023 and Bluefin Pro represents a complete rebuild of that exchange on a verifiable foundation.
User custody
Funds stay in non-custodial Sui smart contracts. The TEE never holds assets.
CEX-like Speed
Sub-millisecond order matching. Fast cancels mean tighter spreads and deeper books.
Public Verifiability
Anyone can reproduce the TEE's computation from inputs and outputs on Walrus. No permission needed.
Onchain Settlement
Final balances, margins, and liquidations enforced by Sui smart contracts.
Open Source
All code binaries will be open-source and anyone running the matching engine can produce the same attestations.
Bluefin demonstrates the pattern for a derivatives exchange and the same architecture applies to any system running fast offchain computation where the results carry real financial stakes and independent verification matters.
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