# L2 Interop Working Group - Call #12 **Aug 6, 2025** - [Recording](https://youtu.be/sqYmCPwvaKE) - [Calendar invite for future calls](https://docs.google.com/forms/d/e/1FAIpQLSfMFEJmyVgjLuiipgxprEkiQXwwK3F_PfGbWvU8ZmV6e_ka0A/viewform) ### [Agenda](https://github.com/ethereum/pm/issues/1608) 1. [The Signal: Ethereum](https://x.com/0xEverly/status/1945842494429700388) + Boundless + Interop [Jacob] 1. [OIF](https://www.openintents.xyz/) updates & getQuote API [Pepe, OpenZeppelin & Jim, LIFI] 1. [t1](https://x.com/t1protocol) - native interop & permissionless asynchronous composability [Orest] 1. [Routescan](https://x.com/routescan_io/status/1951280859698364563) + Interoperable addresses aka chain-specific addresses [Jaack] 1. 7828 resolver - [Unruggable](https://github.com/unruggable-labs/ens-7828-resolver) and Wonderland [Ndeto & Titi] 1. [Axal Yield ](https://x.com/getaxal/status/1952716186061283615)[Ash] ## Call Notes *condensed notes below – watch the recording (above) for full discussion* --- ## AI summary ## 1. The Signal: Ethereum + Boundless (Jacob) **Main Topic:** Trustless cross-chain access to Ethereum state using ZK proofs **Key Takeaways:** - Boundless is building a ZK-powered light client called *The Signal: Ethereum* to enable *verifiable access to finalized Ethereum state* from any chain. - Uses a full validity proof of finalized epochs via Casper finality gadget in RISC Zero zkVM. - Drastically reduced proving costs via: - Faster zkVM versions (R0 v2 → v3), - Transition from AWS to subsidized on-prem compute (via Boundless Market), - Use of EIP-7549 to reduce required attestations (100x cost drop). - Enables chains and apps to verify finalized Ethereum state (and historic ranges) with no trust assumptions beyond Ethereum’s validator set. - Tooling available via the `steel` library and EVM compatibility layer. - Commitment to operate as a public good; already raised $900K+ in proving subsidy funding. - Working toward multi-chain support and eventual “proof singularity”: one proof representing multiple chain states. - Latency today ~12–15 mins, mostly due to finality wait time, but improvements (e.g. 3SF, faster execution) are on the way. --- ## 2. Open Intents Framework (Pepe - OpenZeppelin, Jim - LIFI) **Main Topic:** Cross-chain intents standardization and ecosystem tooling **Key Takeaways:** - **Standardization:** Improving ERC-7683 to make it more practical and complete for real-world wallets and solvers. - **Contracts:** Modular Solidity contracts for intents are ready and being adopted by early partners. - **Tooling:** - Reference solver implementation to bootstrap new ecosystems. - API standard for off-chain quoting to unify integrations across solvers. - SDKs to simplify developer integration. - **Aggregator:** Optional off-chain aggregator is being built to reduce UX friction — not a central dependency. - **LIFI Updates (Jim):** - Finalizing ERC-7683-compliant OAU protocol. - Working on multi-chain input intents with Wonderland team to solve fragmented balances across chains. - **Non-EVM Support:** Conceptually prepared, but not in first milestone. Ready to adapt if ecosystem partners like Coinbase push for it. --- ## 3. t1 Protocol – Native, Fast, Permissionless Interop (Orest) **Main Topic:** Asynchronous, fast, crypto-economically secure interop layer **Key Takeaways:** - **Philosophy:** Fill the gap between ZK-native trustless interop and “trust me bro” solutions. Prioritize *speed* while maintaining meaningful security. - **Mechanism:** - Permissionless composability between L2s by attesting to events/state on other chains via TEE + AVS stack. - zk proofs only used *on-demand* when value-at-risk exceeds crypto-economic budget — a novel cost-saving design. - **Security Architecture:** - Separate sequencing + execution roles. - TEE outputs are made reproducible to enable fraud detection and slashing. - Deterministic outputs → crypto-economic accountability. - **Next Milestones:** - Deploy ERC-7683-based testnet demo with ~second-level latency (vs 1h+ today). - Add support for asynchronous writes and composability use cases. --- ## 4. Routescan – Interoperable Addresses / Chain Metadata (Jaack) **Main Topic:** Championing ERC-7785 as a canonical registry for chain identity **Key Takeaways:** - **Problem:** Cross-chain naming (e.g. `vitalik.eth@arbitrum`) lacks a decentralized, structured backing for defining and verifying what "arbitrum" is. - **Solution:** ERC-7785 as a dictionary of chains — includes name, chain ID, RPCs, explorers, metadata. - **Goal:** Merge this with existing interop address standards (ERC-7828/7930) and ENS-powered formats. - **Importance:** Helps explorers, wallets, infra tools coordinate on consistent metadata and avoids relying on unmaintained GitHub chainlists. - **Call to action:** Encouraging ecosystem to adopt and contribute to ERC-7785 as the backend for 7828/7930-style addresses. --- ## 5. ERC-7828 Resolver – ENS-based Chain-Specific Addressing (Ndeto & Titi – Unruggable & Wonderland) **Main Topic:** Human-readable, chain-specific addresses via ENS **Key Takeaways:** - **Standard:** ERC-7828 = `name.eth@chainname` format using ENS + coin type records. - **Current Implementation:** Resolver contract + library that allows apps to resolve 7828-formatted addresses to chain-specific addresses. - **Data Source:** Currently powered by a centralized chain list; long-term goal is a decentralized registry (potentially 7785-powered). - **Demo:** Live, working resolver repo available. - **Ask:** Collaborators wanted to help evolve this toward a decentralized registry (in line with Routescan's 7785 work). --- ## 6. Axal Yield – Fast Stablecoin Savings UX (Ash & Dev) **Main Topic:** UX demo of savings account leveraging latest standards **Key Takeaways:** - **Architecture:** - 7702-style wallets. - Fast TX batching with Alchemy. - Full EOA exportability for users. - **Performance:** - End-to-end TX processing in 300ms (!) - 100K USDC deposits for ~$0.01 gas cost. - Monitoring of ERC20 and ERC-4626 logs to track user balances on/off platform. - **Vision:** UX-forward, self-custodial product leveraging modern interop and wallet standards. ---