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Ethereum’s Fusaka Upgrade Drops December 3: Here’s Why It Matters

Ethereum’s Fusaka Upgrade Drops December 3: Here’s Why It Matters

Author:
Bitcoinist
Published:
2025-09-20 07:00:47
12
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Ethereum's core devs just set the fuse for Fusaka—mark your calendars for December 3. This isn’t just another network tweak; it’s a targeted boost to scalability and gas efficiency. Traders, start your speculative engines.

The Lowdown on Fusaka

No fluff, no jargon: Fusaka slashes layer-2 congestion and recalibrates fee structures. Validators get streamlined incentives, while DeFi degens might finally catch a break from crippling gas wars. The upgrade’s EIP list reads like a Christmas wishlist for ETH maxis.

Timing Is Everything

With Q4 typically being crypto’s ‘upgrade season,’ Fusaka’s December rollout is either brilliantly strategic or horribly optimistic—pick your side. Either way, exchanges are already prepping downtime warnings while institutional desks quietly adjust derivatives hedges.

Will this finally be the upgrade that makes Ethereum’s ‘ultrasound money’ narrative stick? Or just another line item for ETF issuers to gloss over in their filings? Place your bets.

Ethereum’s Fusaka Devnet Update

The developers reached a consensus on these matters with surprising ease, indicating a smooth path forward despite ongoing testing challenges. They remain committed to the December activation date, barring any major setbacks during the next few months of testing. 

Currently, two versions of the Fusaka Devnet are in operation. Devnet-3 is stable, with client teams actively addressing software fixes. Meanwhile, Devnet-5 is also stable but encountered issues earlier this week, including multiple client bugs and node misconfigurations. 

These problems have reportedly limited the team’s ability to gather critical data on Blob-Parameter-Only (BPO) values. However, insights were still derived from a brief period of stability on Devnet-5, leading to recommendations for setting maximum blob counts for the upcoming hard forks.

Looking ahead, the ethereum Foundation’s EthPandaOps team plans to roll out Fusaka Devnet-6 in the coming weeks to validate the findings from Devnet-5. 

The team is focused on addressing a bug in the Prysm client that has emerged on Devnet-5, which appears to be linked to high blob counts resulting in orphaned blocks. Additionally, a recent update to the “ckzg” library has resolved prior issues, with a new version now available on GitHub.

Upcoming Testnets 

The timeline for the Fusaka rollout is well-defined, with several key upgrades scheduled before the mainnet activation. Upcoming testnets include the Holesky upgrade on October 1, the Sepolia upgrade on October 14, and the Hoodi upgrade on October 28. 

Developers agreed that client teams should consolidate their releases for these testnet upgrades but can individually publish updates closer to the mainnet activation.

In a separate but related development, the Ethereum community is engaged in discussions regarding the naming of a new consensus layer upgrade, referred to as Glamsterdam. 

This will also involve the deprecation of the Sepolia testnet, although developers assured that there WOULD be ample time for the community to adapt to this change, with the new testnet expected to launch in March 2026.

Ethereum

At the time of writing, Ethereum trades at $4.460, recording a 3.5% price drop in the 24-hour time frame. Still, the altcoin registers gains of 80% year-to-date. 

Featured image from DALL-E, chart from TradingView.com

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