Solving Interoperability for the Superchain and beyond

The article presents a plan to build native interoperability into the OP Stack so that chains in the Superchain, and eventually broader Ethereum, can move assets and data without routing through L1 Ethereum. It says current cross-chain transfers rely on L1, which is expensive and slow, and that interop mainnet is planned for next year with transfers completing in under 2 seconds within a single block. The design includes a message passing protocol, the SuperchainERC20 token standard, a shared interop fault proof, and an initial interoperable chain set of OP Mainnet, Mode and Base.