Unichain became the first layer two (L2) blockchain to deploy trusted execution environment (TEE)-based block building, aiming to enhance transaction transparency and fairness while mitigating malicious MEV practices. First-of-Its-Kind TEE Tech Reshapes L2 Transaction Ordering The upgrade, developed by Uniswap Labs and Flashbots, leverages Rollup-Boost to sequence transactions within a secure TEE, enforcing priority-based ordering