The Ethereum Fusaka upgrade has entered the final testnet phase, introducing a single transaction gas limit of approximately 16.78 million units

ChainCatcher news, according to Cointelegraph, Ethereum is entering the final testnet phase ahead of the Fusaka upgrade scheduled for December 3. This upgrade introduces a single transaction gas limit of approximately 16.78 million units to improve block efficiency and prepare the network for parallel execution, and it has now been activated on the Holesky and Sepolia testnets.

The gas limit restricts the processing capacity available for a single transaction, ensuring that no single transaction can monopolize an entire block, allowing the network to handle activities more evenly. The next phase of the Fusaka upgrade is planned for deployment on the Hoodi testnet on October 28, with the mainnet expected to launch in December 2025. The Fusaka upgrade (EIP-7825) is an important part of Ethereum's roadmap, following the Dencun upgrade in March 2024 and the Pectra upgrade on May 6, 2025.

This upgrade introduces the following changes: raising Ethereum's default block gas limit to 60 million, setting the single transaction gas limit to 16.77 million (EIP-7825), and launching PeerDAS—the 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 blocks" instead of the entire dataset. This approach reduces hardware requirements while maintaining network security and enables cheaper, higher-throughput scaling for second layer networks.