Ethereum's Interop Layer (EIL), Sequence's Unified Payments, Eth Updated Roadmap at Devconnect, EIP-7702 Infra Integration

#blockchain #ethereum #web3

We are welcoming you to our weekly digest! Here, we discuss the latest trends and advancements in account abstraction, chain abstraction and everything related, as well as bring some insights from Etherspot’s kitchen.

The latest news we'll cover:

Ethereum Shares New Details On Its New Interop Layer
Sequence Launches Trails to Simplify Crypto Payments
Vitalik Presents Updated Ethereum Roadmap at Devconnect
Why EIP-7702 Infra Matters and How Developers Can Integrate It

Please fasten your belts!

Ethereum Shares New Details On Its New Interop Layer

Ethereum has released new information on its planned interoperability layer (EIL), a major component of its long-term roadmap aimed at enabling seamless communication between Layer 1, Layer 2 rollups, and external ecosystems. The Defiant reports that the update expands on earlier research proposals and clarifies how Ethereum plans to standardize messaging, verification, and settlement across heterogeneous execution environments while maintaining security guarantees.

The article explains that Ethereum’s interop layer is being developed as a “native, trust-minimized messaging fabric” that avoids the weaknesses of traditional bridging architectures. Rather than relying on off-chain multisigs or third-party relayers, the new design is centered around verifiable cryptographic proofs, allowing chains to authenticate each other’s state changes with minimal trust. Developers describe this as a shift toward “L1-secured interoperability,” where Ethereum’s consensus acts as the common root of truth.

One major focus is how the interop layer will treat rollups as first-class citizens. The update notes that Ethereum plans to unify L2 verification pathways so that all rollups, whether optimistic or ZK, can submit state proofs in standardized formats. This would allow cross-rollup transfers, intents, or asset movements to finalize without custom bridge logic, reducing technical fragmentation and improving safety.

The article also highlights ongoing work to support light-client proofs for external ecosystems. According to the update, Ethereum researchers are exploring mechanisms that let non-EVM chains expose verifiable states in a way the interop layer can consume. This could eventually enable secure communication between Ethereum and networks like Bitcoin, Cosmos-SDK chains, or Solana-based systems without introducing new centralized trust assumptions.

Sequence Launches Trails to Simplify Crypto Payments

Infrastructure firm Sequence has unveiled its new platform Trails, designed to simplify cross-chain payments by allowing applications to accept crypto from any supported chain with a single click.

The initiative aims to address crypto’s fragmentation problem — with tokens, wallets, gas fees, and chains all operating in silos. As CEO Peter Kieltyka told Decrypt, “You have liquidity everywhere, you have tokens everywhere, you have gas tokens everywhere — the chain fragmentation just really hurts developers and applications from actually being able to monetize and create a successful business on-chain.”

Trails uses “intent-based interoperability” to execute transactions seamlessly behind the scenes. In essence, a user decides what they want to do — for example, pay 100 USDC on Arbitrum — and Trails handles the underlying steps automatically, regardless of which network the user holds assets on. Head of cross-chain at Sequence, Shun Kakinoki, described the platform as “practical chain abstraction.”

The system will initially support 16 EVM-compatible chains, including Ethereum mainnet, Polygon, Base, Arbitrum, and Avalanche. Future support is expected for non-EVM networks; the Solana VM is listed as the next target.

With $53 million raised to date and the acquisition of Light (a chain-abstraction firm), Sequence positions Trails as a developer-first stack for unified payments across multiple networks.

Vitalik Presents Updated Ethereum Roadmap at Devconnect

Ethereum Co-founder Vitalik Buterin delivered a 30-minute roadmap presentation at Devconnect, offering a structured overview of Ethereum’s philosophical principles, technical foundations, and upgrade trajectory through 2027. He contrasted Ethereum’s “can’t-be-evil” design with failures of centralized systems such as Mt. Gox and FTX, emphasizing verifiability, credible neutrality, and community-driven development as core values that define the protocol.

Buterin revisited blockchain fundamentals, highlighting programmability, global consensus, and protection against double spending as the basis for applications like payments, DeFi, DAOs, and ENS. He also outlined where blockchains alone fall short — privacy, scalability, latency, and real-world data — while noting rapid advances in cryptography, including ZK proofs and FHE, that increasingly expand what decentralized systems can achieve.

The roadmap for 2025–2026 centers on scalability. Vitalik noted that Ethereum’s gas limit has already increased by 50% this year and may reach 60 million as validator voting progresses. Key upgrades include EIP-7732 (enshrined proposer-builder separation) and block-level access lists, which allow all non-producing nodes to process blocks in parallel. These improvements aim to support higher throughput without compromising decentralization.

Vitalik also highlighted the emergence of ZK-EVM proofs capable of verifying entire Ethereum blocks in real-time. This development dramatically reduces computational requirements for full nodes, potentially allowing full verification even on consumer hardware. He expects node participation to rise within one to two years.

Looking to 2026–2027, Buterin described upgrades focused on censorship resistance, stronger account abstraction, improved wallet security, better light clients, and enhanced privacy. Longer-term work under Lean Ethereum aims at optimality, zk-friendly design, quantum resistance, faster finality, and next-generation VMs, all to ensure Ethereum remains secure and efficient for decades.

Why EIP-7702 Infra Matters and How Developers Can Integrate It

The Etherspot team presented a detailed workshop at the Trustless:// conference during Devconnect, explaining why the ecosystem needs EIP-7702 infrastructure and how developers can integrate it using Ethereum Foundation–supported tooling.

The session opened with a key argument: EIP-7702 gives EOAs a second life by enabling one-click transactions, batching, stablecoin gas payments, and sponsored transactions — all without requiring users to become smart-contract-wallet users. The presenters emphasized that 7702 can dramatically improve UX while maintaining self-custody, especially as reliance on centralized relayers poses long-term risks.

The workshop highlighted concerns around centralization in today’s ecosystem: outages at cloud providers, past hacks mitigated with centralized mechanisms, and the systemic dependence on dollar-denominated stablecoins. These examples were used to argue that non-custodial, censorship-resistant infrastructure is essential and that 7702 must not rely on centralized relayers or proprietary mempools.

The presenters confirmed that the Ethereum Foundation’s EIP-7702 infrastructure is free to use, publicly accessible, open-source, requires no API keys, and is built on top of the EntryPoint v0.9 shared mempool, which provides distribution across multiple bundlers to avoid single points of failure. The infrastructure is currently live on Ethereum mainnet, Optimism, and Arbitrum, with support for additional networks planned.

The second half of the workshop demonstrated integration steps using the Etherspot free bundler SDK, covering how to create a smart account client, generate authorization for a delegated EOA, and submit 7702-style user operations. Attendees were shown working examples, including multi-call batching and sponsored UserOps.

You can watch the full workshop recording here.