19.09.2025 05:15

Ethereum is gearing up for a significant leap forward with its Fusaka mainnet upgrade, a pivotal hard fork now officially scheduled for December 3rd, precisely at Epoch 411392. This critical development, whose timeline for both the public testnet and the Fusaka BPO hard fork was confirmed following intensive discussions during the Ethereum developer call ACDC #165, has been widely reported across various internet sources since September 19th, with former Galaxy Digital Research VP Christine Kim playing a key role in publicizing these outcomes.

Serving as the immediate major protocol upgrade after the Pectra upgrade, which is tentatively penciled in for May 2025, Fusaka is an integral piece of Ethereum’s expansive Surge roadmap. This strategic progression is meticulously crafted to amplify the network’s scalability, refine its operational efficiency, and fortify its inherent resiliency. A central tenet of this forthcoming upgrade involves a concerted effort to substantially cut down the transaction costs associated with Layer 2 (L2) rollups, thereby making the Ethereum ecosystem more economically viable and widely accessible.

The Fusaka hard fork is engineered to deliver a dual benefit: a dramatic expansion of blob capacity coupled with a notable reduction in L2 rollup expenditures. These improvements are slated to materialize through a sophisticated interplay of optimized data availability protocols and a refined framework for validator duties. Preliminary analyses conducted on Devnet-5 have yielded particularly encouraging results, suggesting that the network’s blob capacity could potentially more than double within merely two weeks following the mainnet activation. This substantial enhancement is poised to considerably boost overall throughput while rigorously safeguarding the foundational integrity and security of the Ethereum protocol.