The Ethereum team proposed the EIL solution, aiming to allow all L2s to be used seamlessly as "one chain."

The Ethereum Account Abstraction team has released the "Ethereum Interoperability Layer" (EIL) proposal, aimed at allowing all L2s to operate seamlessly as if they were on the same chain.

EIL is based on ERC-4337, enabling users to perform cross-chain operations with a single signature within their wallets, without the need for cross-chain bridges or relays, while maintaining self-custody and censorship resistance, thus achieving a unified experience in the Ethereum multi-chain ecosystem.