OP Mainnet vs Unichain

OP Mainnet (Optimism) is an optimistic rollup that batches transactions to Ethereum and relies on fraud proofs submitted during a seven‑day challenge window. The Bedrock upgrade in 2023 cut L1 calldata costs by 40 % and introduced multi‑proof modularity. ‘RetroPGF’ rounds redistribute protocol revenue to public‑goods builders, governed by the OP token‑holder Collective.

Unichain is an OP‑Stack Layer‑2 built by Uniswap Labs that employs a trusted‑execution‑environment (TEE) block builder to guarantee ordered execution free from MEV. Liquidity pools enjoy baked‑in sandwich protection, and the UNI token governs sequencer whitelists. The chain inherited native hooks from upcoming Uniswap V4, enabling dynamic fee models.