Arbitrum Adds Native EIP-7702, Fusaka Cell Proofs, CZ x YZI Oracle, and Tether’s WDK

#blockchain #web3 #ethereum

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:

Arbitrum Adds Native EIP-7702 via ArbOS 40
Fusaka Switches Blob Proofs to Cell Proofs — Update Required
CZ Backs YZI Labs’ Oracle Focused on Prediction Markets
Tether Releases WDK for Non-Custodial Wallets

Please fasten your belts!

Arbitrum Adds Native EIP-7702 via ArbOS 40

Arbitrum has introduced support for EIP-7702 through its ArbOS 40 upgrade on Arbitrum One and Nova. The blog post explains how 7702 lets a regular EOA temporarily delegate execution to smart-contract logic for a single transaction — no migration, no new account — bringing native batching and sponsor-gas patterns onchain.

EIP-7702 adds a Type 0x04 txn with an authorization list. During execution, the EOA briefly “borrows” code from a target contract, then reverts to normal, avoiding permanent account changes. Arbitrum highlights use cases like atomic multi-calls (e.g., approve + stake) and dapp-paid gas without requiring the user to hold ARB/ETH equivalents on the chain.

The post positions 7702 as complementary to ERC-4337: 4337 keeps rich features via UserOps/EntryPoint/Paymasters, while 7702 delivers protocol-level AA ergonomics that work with existing EOAs and tooling. Arbitrum points to low fees and Stylus/EVM composability as a proving ground for new wallet patterns built on 7702.

Bottom line: 7702 on Arbitrum reduces UX friction for “one-click” actions and sponsored flows, while preserving user control and avoiding custom relayer dependencies. It’s a practical step toward account-abstraction UX that works with wallets users already have.

Fusaka Switches Blob Proofs to Cell Proofs — Update Required

EIP-7594 (PeerDAS) changes the proof format for blob transactions from blob proofs to cell proofs so nodes can sample only parts of a blob. This might break some Sepolia deployments over the last few days and could affect anyone generating blob transactions as Fusaka rolls out.

Already-signed blob transactions remain valid, but their proofs must be recomputed as cell proofs. Some clients (notably go-ethereum) will auto-convert on eth_sendTransaction / eth_sendRawTransaction; the conversion takes about one second at the RPC.

Transactions sitting in mempools at fork time may be dropped by some clients and auto-converted by others. If your txs don’t land quickly post-fork, re-send them with cell proofs.

Action: update your senders now to emit cell proofs natively. All major client libraries expose ComputeCellsAndKZGProofs() with examples across languages.

CZ Backs YZI Labs’ Oracle Focused on Prediction Markets

YZI Labs, with support from CZ, announced an initiative to build a purpose-built oracle for prediction markets. The goal is to deliver low-latency, manipulation-resistant data that can settle event markets quickly and credibly across chains.

According to the announcement, the oracle will prioritize thin-liquidity scenarios common in prediction markets, where standard price oracles struggle and are easier to game.

Design notes highlighted include reputation-weighted reporter sets, staking/slashing for integrity, and mechanisms to reduce MEV exposure (e.g., commit-reveal or similar anti-sandwich patterns). Multi-chain support is part of the roadmap, with an aim to publish consistent, verifiable feeds usable by L2s and appchains without custom integrations per market.

For builders, the appeal is faster, cleaner settlement for outcomes (sports, elections, crypto events) with less custom off-chain adjudication. If delivered, a specialized oracle could simplify dapp code paths, reduce dispute windows, and improve UX for users who expect near-instant resolution.

In the context of account and chain abstraction, intent-based flows and smart-account experiences benefit from predictable settlement primitives. With a strong cross-chain prediction-oracle layer, wallets and dapps could merge the “oracle + payout” process into one seamless user action, leaving solvers to handle routing and finalization in the background.

Tether Releases WDK for Non-Custodial Wallets

Tether announced an open-source Wallet Development Kit (WDK) aimed at helping teams build non-custodial wallets more quickly and safely.

The WDK is described as a modular toolkit with SDKs and reference components for common tasks such as key handling, transaction construction and signing, and network connectivity. By packaging these blocks behind clear interfaces, Tether wants to reduce foot-guns around cryptography, serialization, and provider integration.

Multi-chain support is a core theme, reflecting USDT’s presence across numerous networks. The kit is positioned to help teams ship consistent flows for stablecoin transfers without reinventing per-chain logic, while remaining adaptable to evolving chain standards and fee models.

Tether frames open-sourcing as both a security and a velocity choice. Public code enables community review, easier audits, and contributions from wallet and security researchers — benefits that are hard to capture with closed implementations. It also creates a single place to codify best practices as the ecosystem converges on safer defaults.

For exchanges, fintechs, and consumer apps, a standardized toolkit can compress time-to-market and lower implementation risk. Product teams get a repeatable baseline for seedless onboarding, recovery patterns, and transaction flows, instead of stitching together ad-hoc libraries with uneven quality.

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