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 for the messaging protocol is preparing for its upcoming release, and that once the development network phase is complete, the messaging protocol and tok...