- Fusaka upgrade brings 11 protocol changes, including PeerDAS, blob capacity increases, and higher gas limits for improved scalability.
- Staged BPO fork will raise blob targets over two weeks, smoothing the transition and reducing load on Ethereum validators.
Developers confirmed the Fusaka upgrade rollout schedule during the ACDC 165 call. The plan places Holesky testnet on October 1, Sepolia on October 14, Hoodi on October 28, and mainnet on December 3. Christine Kim posted the timeline on X and noted teams will reconfirm epoch numbers and timings ahead of each activation.
Fusaka bundles eleven protocol proposals aimed at higher throughput, improved node stability, and better validator performance. The package includes PeerDAS for data availability sampling and spam control, an increase in blob capacity, and a raised gas limit of 150 million units. Early devnet tests reported that blob capacity may more than double during the fortnight after activation.
Engineers outlined a staged BPO hard fork. The fork will begin without blob capacity changes. After a week, the network will raise blob target and maximum from 6/9 to 10/15. A second update one week later will move values to 14/21. Those steps intend to smooth the load on validators while expanding payload handling.
Past upgrades set the foundation
Pectra raised validator limits and improved wallet features seven months earlier. Dencun enabled blob transactions and sharply lowered rollup costs. Following the earlier change, some Layer 2 rollups cut monthly data availability bills from roughly $15,000 to $1,500 and reduced transaction fees by large percentages.
Moreover, Fusaka should lower Layer 2 costs further by expanding blob capacity and integrating PeerDAS. Analysis shows that wider blob windows reduce per-transaction data charges and speed settlement for rollups.
Meanwhile, the Ethereum Foundation announced formation of a dAI team led by Davide Crapis. The unit will draft open standards for agent identity, payments, and coordination so autonomous agents can transact and verify actions on-chain. The effort seeks neutral protocols that limit central gatekeeping while keeping systems auditable and verifiable.
If scheduled releases hold, the December mainnet upgrade will deliver measurable throughput gains and clearer technical paths for future work.
