A few days ago, I came across a tweet where an L2 developer complained: “There are so many Rollups now, it’s like chain convenience stores, and as a result, they don’t interact with each other.” The comment section was filled with agreement, and everyone was asking—Is it possible to make these Rollups directly communicate? Within minutes, someone shared a link: ERA.

ERA is a platform launched by Caldera, focusing on a Rollup ecosystem that prioritizes “interoperability.” It allows project teams to deploy customizable Rollups based on Ethereum's security, with adjustable block times, fee models, and privacy parameters. More importantly, it has a unified layer called Metalayer, which can connect different types of Rollups—whether optimistic or zero-knowledge—into the same network, enabling cross-chain messaging, resource sharing, and collaborative operation.

What does this mean? For developers, when a new chain goes live, it can immediately tap into existing liquidity pools and user bases, significantly reducing cold start costs; for users, the cross-chain experience is as smooth as a single chain. The $ERA token is the core of the ecosystem, used for paying transaction fees, staking validators, and participating in governance upgrades. As competition intensifies in the Rollup space, whoever can master the entry point for interoperability will find it easier to position themselves. #caldera @Caldera Official $ERA