Ethereum Interop Layer Unified Experience

The fracture experience under multi-chain development

With the rise of L2 solutions such as Arbitrum, Optimism, Base, Scroll, and Linea, Ethereum has significantly improved in performance and Gas costs, but the user experience has become fragmented.

The same asset is dispersed across multiple chains; wallets and DApps must be integrated chain by chain; transactions still rely on third-party bridging tools. Users frequently switch between multiple chains, causing the originally unified Ethereum experience to be fragmented into multiple islands, becoming a major obstacle to Web3 adoption.

EIL: Bringing cross-chain operations back to a single-step completion

The core idea of the Ethereum Interop Layer (EIL) is to make cross-chain interactions as natural as single-chain operations. EIL utilizes ERC-4337 account abstraction and on-chain verification technology, allowing wallets to automatically complete cross-Rollup operations without the need for additional bridging or trusting third parties.

Main features include:

• Use a single signature to perform operations across multiple chains;
• Does not rely on centralized bridging, Solver, or external Relayer;
• All logic is completed on-chain, the process is transparent and verifiable.

This means that users only need to perform one operation to complete any multi-chain task, truly returning to a simple experience at the transaction level.

Wallets have become the unified entry point to a multi-chain world.

The implementation of EIL will evolve wallets from single-chain tools into multi-chain collaborative browsers. For users, the logic of “chain” will be abstracted, replaced by intuitive “operation targets.”

For example:

• Cross-chain transfer: Alice’s USDC is on Arbitrum, uploaded to Bob on Base with just one send;
• Cross-chain minting NFT: No matter which L2 the funds are on, the wallet automatically aggregates to complete the minting;
• Cross-chain trading: If the liquidity of Optimism is better, the system will automatically complete the liquidity switch.

Transitioning from “chain-centric” to “transaction-centric,” EIL allows users to complete the most complex cross-chain tasks with the simplest interactions.

Decentralization and the adherence to trust boundaries

EIL has not sacrificed security for performance; its design continues the core values of Ethereum: self-custody, verifiability, and trustlessness. All cross-chain processes operate on-chain, and the wallet execution logic can also be publicly audited, avoiding the single point of failure risk brought by centralized bridging. In other words, a better UX is not achieved at the expense of compromising security, but rather through a trustless upgrade made possible by technological iteration.

Rebuilding the integration power of the multi-chain ecosystem

The launch of EIL has restructured the ecological logic between developers and users:

• Wallet natively supports multiple chains, no need for development on each chain.
• New Rollup auto-compatible, lowering the threshold for cross-chain integration;
• DApps can deploy logic uniformly without the need for individually customizing cross-chain modules.

This move will reshape the consistency of the UX experience for Ethereum, simplifying operations and making the Layer 2 ecosystem more coordinated.

Summary

The Rollup era brings breakthroughs in scalability, but it also makes the user experience more fragmented. The emergence of the Ethereum Interop Layer (EIL) returns cross-chain interactions to an intuitive operation akin to single-chain usage, while reshaping the overall usability of Ethereum without sacrificing security. In the future, when users open their wallets, they will no longer feel like they are in a multi-chain environment, but instead will re-experience the smooth world of “single Ethereum.”