ArbOS 40 “Callisto” is now live on Arbitrum One and Nova!

Description

ArbOS 40 “Callisto” is now live on Arbitrum One and Nova, bringing key features from Ethereum’s Pectra upgrade. It includes EIP-7702 for account abstraction, EIP-2537 for BLS precompiles, EIP-2935 for block hash access and a minor Stylus fix enhancing developer experience.

Publish date

June 18, 2025

Publisher

Web URL

https://x.com/ArbitrumDevs/status/1935324657634128296

Referenced by

EIP-7702 brings more account abstraction to Arbitrum chains. EOAs can temporarily include executable code during a transaction. This enables account abstraction-like features such as delegation, batching, transaction sponsorship and sub-key permission control.

Crypto news

Quote

Pectra goes live on Arbitrum

Crypto news

News story

This upgrade brings new capabilities from @Ethereum.org’s Pectra hard fork including: EIP-7702 (Account Abstraction) EIP-2537 (BLS Precompile) EIP-2935 (Block Hash Access) And a minor Stylus fix for devs

Crypto news

Quote