Interop

Previous knowledge

In June 2025, the Ethereum Foundation (EF) announced the Protocol team, restructuring around three strategic goals: scale L1, scale blobs and improve UX. The "Improve UX" track targets a "seamless, secure and permissionless experience across the Ethereum ecosystem, for individuals and institutions." Wonderland is working with the EF on this track, where one of the main challenges is interoperability.

The rollup-centric roadmap helped scale Ethereum, but this growth created a fragmentation problem as users and developers must navigate multiple different networks with incompatible tools, token representations and bridges where each participant implements their own interface, leading to a significant degradation in user experience.

The intent model emerged as a way to address this problem, enabling simple and fast cross-chain actions, facilitated by third-party solvers (who front liquidity on destination and are paid back later). This approach was pioneered by Across, and a vibrant ecosystem of intent protocols emerged to address Ethereum's interoperability challenge.

In this context, the Open Intents initiative emerged, a collaborative Ethereum ecosystem effort, focused on standardising intents and related cross-chain infrastructure, building open source tooling and advocating for improved interoperability on Ethereum. Wonderland has been an active contributor to this effort, contributing to the evolution of standards.

What this handbook covers

The handbook reviews Wonderland's Interoperability focus areas, summarising the key problems we have been working on, linking to documentation to learn more and start building. Our work has involved research efforts to better understand the adoption of standards focused on interoperability and user experience, the outputs of which are also included.