Ethereum's Fusaka Upgrade Enters Final Testnet Stage, Introducing a Single Transaction Gas Limit of around 16.78 Million Units

BlockBeats News, October 22nd, according to Cointelegraph report, Ethereum is entering the final testnet phase before the Fusaka upgrade scheduled for December 3rd. This upgrade introduces a single transaction Gas limit of approximately 16.78 million units to improve block efficiency and prepare for network parallelization, and has now been activated on the Holesky and Sepolia testnets. The Gas limit restricts the processing capacity available to a single transaction, ensuring that no single transaction can dominate an entire block, allowing the network to handle activity more evenly.

The next phase of the Fusaka upgrade is scheduled to be deployed on the Hoodi testnet on October 28th, with the mainnet expected to go live in December 2025. The Fusaka upgrade (EIP-7825) is a key part of the Ethereum roadmap, following the Dencun upgrade in March 2024 and the Pectra upgrade on May 6th, 2025. This upgrade introduces several changes: raising Ethereum's default block Gas limit to 60 million, setting a single transaction gas limit at 16.77 million (EIP-7825), and introducing PeerDAS - a core feature of this upgrade. PeerDAS (Peer Data Availability Sampling) allows Ethereum nodes to store only a small random portion of the second-layer "data block" rather than the entire dataset. This approach, while maintaining network security, reduces hardware requirements and enables cheaper, higher-throughput scaling for second-layer networks.