In recent weeks the blockchain community has been closely watching a growing rift between two of the most prominent public‑layer ecosystems: Ethereum, the world’s leading smart‑contract platform, and Base, the Layer‑2 network launched and supported by Coinbase. The disagreement centers on a technical specification that would enable a single wallet to manage transactions across both chains using a common standard. After months of back‑and‑forth, the two projects have announced that they will each move forward with a different Ethereum Improvement Proposal (EIP), effectively abandoning the pursuit of a unified wallet standard.

### The background of the debate Ethereum’s core developers have long championed a set of standards designed to simplify user experience and reduce friction for developers. One such effort is EIP‑8141, a proposal that defines a consistent method for signing and broadcasting transactions that involve multiple chains or roll‑ups. The idea behind EIP‑8141 is to let a single wallet generate a transaction payload that can be interpreted by any compliant chain, thereby eliminating the need for users to switch wallets or manually copy addresses when moving assets between Ethereum’s mainnet and its various scaling solutions. Base, on the other hand, was created by Coinbase as a developer‑friendly, optimistic roll‑up that inherits security from Ethereum while offering lower fees and faster finality.

Early on, Base’s team expressed interest in adopting the same cross‑chain transaction format as Ethereum, hoping to foster seamless interoperability for the growing number of users who hold assets on both layers. However, as the technical details of EIP‑8141 were fleshed out, Base engineers identified several design choices that conflicted with their own roadmap and security model. ### The two competing proposals The crux of the disagreement lies in the subtle but important differences between EIP‑8141 and an alternative draft known as EIP‑8130. While both proposals aim to standardize how wallets encode transaction data for multi‑chain execution, they diverge on three main points: 1.

**Signature scheme** – EIP‑8141 recommends a newer, aggregated signature format that reduces gas costs when multiple signatures are required. Base’s security auditors argued that the aggregated scheme had not yet been battle‑tested at the scale required for a high‑throughput roll‑up, and they preferred the more proven ECDSA approach outlined in EIP‑8130. 2. **Gas accounting** – The two EIPs handle gas metering differently.

EIP‑8141 proposes a unified gas‑limit field that is interpreted by each chain based on its own execution cost tables. Base’s developers felt this could lead to unpredictable fee spikes on their network, and they advocated for a fixed‑gas model that explicitly lists the gas budget for each hop, as described in EIP‑8130. 3. **Backward compatibility** – Ethereum’s community places a strong emphasis on preserving compatibility with existing wallets and smart contracts.

EIP‑8141 includes a compatibility layer that allows legacy wallets to fall back to older signing methods. Base, however, wanted to streamline the user experience by enforcing a single, modern signing flow, which aligns with the design of EIP‑8130. These technical disagreements were amplified by differing timelines.

Ethereum’s core developers have been polishing EIP‑8141 for over a year and aim to integrate it into the upcoming Shanghai‑plus upgrade. Base, meanwhile, is preparing for a major network launch in Q4 2026 and needs a stable, well‑tested standard that can be shipped on schedule. The pressure to meet these deadlines contributed to the decision to pursue separate paths. ### Implications for wallets and dApps The immediate fallout from the split is that multi‑chain wallets—such as MetaMask, Rainbow, and Coinbase Wallet—will now need to implement support for two distinct transaction formats if they wish to remain compatible with both Ethereum and Base.

This adds development overhead and may result in a fragmented user experience, where a wallet might automatically select the wrong format for a given transaction, prompting users with confusing error messages. Decentralized applications (dApps) that operate across both layers will face similar challenges. A dApp that previously relied on a single signing request to move assets from Ethereum to Base will now have to detect the target chain, generate the appropriate payload according to either EIP‑8141 or EIP‑8130, and possibly request separate user confirmations. For developers, this means extra code paths, additional testing, and a higher risk of bugs that could expose users to lost funds or failed transactions.

### Community response and possible work‑arounds Reactions from the broader community have been mixed. Some developers expressed disappointment, noting that the original goal of a universal wallet standard was a key selling point for the broader adoption of roll‑ups.

Others, however, praised both teams for choosing pragmatic solutions rather than forcing a compromise that might have introduced security vulnerabilities. In the short term, a few work‑arounds are emerging: - **Bridge adapters**: Third‑party services are building lightweight adapters that translate between the two formats on the fly. These adapters sit between the wallet and the blockchain, converting an EIP‑8141 payload into an EIP‑8130‑compatible one (or vice‑versa) before broadcasting. - **Dual‑mode wallets**: Some wallet developers are releasing beta versions that let users toggle between “Ethereum mode” and “Base mode,” automatically switching the signing algorithm and gas‑limit handling based on the selected mode.

- **Standard‑agnostic SDKs**: Library maintainers are updating their software development kits (SDKs) to expose a higher‑level API that abstracts away the underlying EIP. The SDK determines the correct format at runtime, sparing dApp developers from handling the details themselves. While these interim solutions help mitigate friction, they are not a substitute for a true, single standard that all parties agree upon. The longer the divergence persists, the more likely it is that other Layer‑2 solutions will follow Base’s lead, potentially fragmenting the ecosystem further.

### Looking ahead Both Ethereum and Base have reiterated their commitment to user safety and network reliability. Ethereum’s roadmap indicates that EIP‑8141 will be finalized and rolled out as part of the next major upgrade, which also includes improvements to transaction fee markets and sharding preparations. Base, meanwhile, plans to ship EIP‑8130 alongside a suite of performance enhancements designed to boost throughput to 10,000 transactions per second.

In the broader context, the split underscores a recurring theme in the blockchain space: the tension between rapid innovation and the need for common standards. As the industry matures, we may see a convergence of best practices, but for now, developers, wallets, and users must navigate a more complex landscape. Ultimately, the decision to pursue separate standards reflects the practical realities of building at scale.

While it may inconvenience some, it also encourages a healthy diversity of approaches, each optimized for its own network’s strengths. Users can look forward to more robust, secure experiences on both Ethereum and Base, even if that means carrying a slightly heavier technical burden in the short term. --- *This article was updated to reflect the latest statements from Ethereum core developers and Base engineering leads, and to provide guidance for developers preparing for the upcoming changes.*