Optimism Approves Superchain Upgrade Paving Way for Interoperability Launch
Key Highlights Optimism governance approved Upgrade 20 on Sept. 16, initiating a transition from Output Root Dispute Games to Super Root Dispute Games across OP Sepolia, Ink Sepolia, Soneium Minato, and Unichain Sepolia testnets. The upgrade introduces timestamp-based dispute proofs—replacing L2 block numbers—to establish the common time reference required for future Superchain cross-chain interoperability. Mainnet ...