Optimism developers have announced a roadmap plan to build an interoperable communication layer between Layer 2 chains in their Superchain ecosystem, which will include a messaging protocol, Superchain token standard (Superchain ERC20), interoperable proof of failure, and a set of interoperable chains. Optimism said that the development network of the messaging protocol is preparing for the upcoming release, and after the development network phase is completed, the testnet of the messaging protocol and token standard will be launched and finally launched on the mainnet. Optimism said that the technology vision is not only committed to solving the interoperability of the hyperchain, but also the interoperability of the wider Ethereum to ensure a consistent user experience across different ecosystems.