All Core Devs - Consensus (ACDC) #167
🦓 Fusaka upgrade: 📅 mainnet proposed for Dec 3 (not set yet); ✅ audit contest;✅ Holešky testnet BPO2 (14/21 blobs); ✅ Sepolia testnet (L2s surprised by blob to cell proofs change); 📅 Hoodi testnet Oct 28
💫 Glamsterdam upgrade: ePBS… pic.twitter.com/bvNoNvQcnH
— abcoathup.eth 🐡 🛡️🦇🔊 (@abcoathup) October 17, 2025
This week, Ethereum developers launched a successful test of the upcoming Fusaka upgrade on the Sepolia network, marking another step toward the upgrade’s mainnet rollout. This comes after a successful rollout on the Holesky testnet two weeks ago.
A successful launch of Fusaka on the Hoodi testnet on Oct. 28 would allow developers to set a definite date to activate the upgrade on Ethereum’s mainnet, with a tentative date of Dec. 3 suggested by developers at the last concluded ACDC meeting.
Fusaka upgrade
The Fusaka upgrade comes only a few months after Ethereum’s major Pectra upgrade and is aimed at lowering costs for institutions using the Ethereum network.
In a recent tweet, Kevin O'Leary pointed out that as the markets crashed over the weekend, Ethereum got congested and fees skyrocketed past $1,000 just to process small transactions. "That’s like paying a thousand-dollar toll to drive on a one-lane highway," he added.
Fusaka introduces PeerDAS, a data verification method that allows validators to process only portions of data ("blobs"), reducing bandwidth requirements and slashing costs for institutional users and layer-2 networks.