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Ethereum's Fusaka Upgrade Goes Live on Mainnet

With Fusaka live, Ethereum scales its blob layer via PeerDAS and welcomes new protocol tweaks.
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Dec 3, 2025 • 1 min read

Ethereum has finalized its Fusaka hard fork on mainnet, bringing one of the most important scaling upgrades since Dencun online.

What's the scoop?

  • The Headline: PeerDAS (EIP-7594) is now live, enabling Ethereum to massively expand blob capacity for rollups. This shift will lead to cheaper transactions and higher throughput across the Ethereum ecosystem.
  • What Else Changed: Fusaka bundles a dozen protocol improvements across data availability, gas mechanics, and beyond. Other highlights include EIP-7918, which stabilizes blob fees; EIP-7951, a new secp256r1 precompile for efficient signature verifications; and EIP-7892, which makes it possible to raise blob capacity between major Ethereum upgrades.
  • Why It Matters: Dencun gave Ethereum blobs as a data availability resource. Now, Fusaka has scaled this data layer, making blobs' metaphorical lanes even wider. The path toward a leaner Ethereum is taking shape, and the advance of PeerDAS will play a big role here.

Bankless take:

Ethereum’s scaling era isn’t theoretical anymore. We’re already seeing L2s flirt with five-figure TPS, and with blob capacity set to expand from here, those numbers won’t look impressive for long.

This is the modular bet paying off. Horizontal scaling for rollups, plus vertical gains from a leaner L1. Put these pieces together and the path to a +1M ecosystem TPS seems like an inevitability. And remember: Fusaka is just the latest step forward, though it won’t be the last.

Not financial or tax advice. This newsletter is strictly educational and is not investment advice or a solicitation to buy or sell any assets or to make any financial decisions. This newsletter is not tax advice. Talk to your accountant. Do your own research.

Disclosure. From time-to-time I may add links in this newsletter to products I use. I may receive commission if you make a purchase through one of these links. Additionally, the Bankless writers hold crypto assets. See our investment disclosures here.

Published in Bankless

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