Mainnet Migration to OP Enterprise
Unichain (UNI) · Releases & Updates · October 29, 2026
Uniswap's Unichain L2 moves mainnet operations to Optimism's OP Enterprise on October 29, 2026, prepping native Superchain interop; no user action needed.
Unichain, the DeFi-focused Ethereum Layer 2 built by Uniswap Labs on the OP Stack Superchain, is upgrading to OP Enterprise, Optimism's managed-operations service. Per the official Uniswap blog post of October 9, 2026, the testnet migrates on October 13 and Unichain mainnet migrates on October 29, 2026. After the switch Optimism runs Unichain's production sequencers, RPC infrastructure, monitoring and incident response. Chain ID, contracts, balances, apps and Uniswap v2, v3 and v4 deployments stay the same, and no user action is required. The move prepares Unichain for native OP Stack interoperability, so users can later move ETH and other assets between Unichain and other Superchain chains without a bridge. Unichain remains a Stage 1 rollup with permissionless fault proofs. Key topics: Unichain mainnet migration, OP Enterprise, Optimism Superchain, Uniswap L2, UNI, OP, Superchain interop.