Ethereum's upgrade 'Fusaka' is going live December 3rd

Ethereum’s next major network upgrade, Fusaka, is scheduled to go live on December 3, 2025, according to Ethereum’s own roadmap and official X posts. Fusaka follows the earlier Pectra upgrade and is framed by Ethereum core developers as a scaling-focused hard fork designed to improve throughput, efficiency, and the experience for both users and developers without changing Ethereum’s core permissionless model. The upgrade’s most important technical change is PeerDAS (Peer Data Availability Sampling), implemented through EIP-7594, which is intended to expand blob-data capacity for rollups while reducing the storage and bandwidth burden on full nodes. Ethereum also plans a higher block gas limit and a cap on gas per transaction, plus smaller protocol changes such as EIP-7951 support for the secp256r1 curve and other EIPs aimed at improving scalability, security, and wallet/device compatibility. In practical terms, Fusaka matters because it is part of Ethereum’s broader push to lower L2 costs, support more activity on the network, and prepare the protocol for later scaling upgrades.

✨ AI-generated background, compiled from web sources — not editorial content.

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