Ethereum’s Fusaka Upgrade Goes Live

Ethereum’s newest upgrade, Fusaka, has officially gone live and is expected to bring cheaper transactions, smoother performance and easier app logins across the Ethereum ecosystem. This upgrade follows the rise in rollup usage and prepares the network for the next phase of global adoption.

• Cheaper Rollup Transactions Ahead
• Ethereum L1 Becomes Faster & More Efficient
• A Big Step Toward Simpler App Logins
• Better Groundwork for Future Innovation
• What Users & Node Operators Need to Know

Cheaper Rollup Transactions Ahead

Rollups like Base, Arbitrum and Optimism depend on Ethereum for posting data. When Ethereum has limited blob space, rollup fees increase. Previously, Ethereum could include up to 9 blobs of rollup data per block.

Fusaka introduces PeerDAS, a system that lets nodes verify data by checking small samples instead of downloading everything. This allows Ethereum to safely increase blob capacity without requiring stronger hardware.

Ethereum will soon increase blob capacity in small steps:

• Increase to 15 blobs next week
• Increase to 21 blobs in early January

These increases are expected to gradually reduce rollup fees.

⏳ Wait is over! Fusaka upgrade - another big milestone for Ethereum is landing 🦓

🗓️ Dec 03, 2025 at 21:49:11 UTC

Let’s celebrate the progress, the community, and the builders who keep the chain moving forward. 💛

📍Join us live with on Fusaka upgrade countdown with… https://t.co/UyvL79cJM3

— Pooja Ranjan | ranjan.eth (@poojaranjan19) December 3, 2025

Ethereum L1 Becomes Faster & More Efficient

Fusaka also strengthens Ethereum’s base layer. The network now supports more computation per block due to a higher gas limit. Certain heavy operations have been repriced so they cannot slow the network during busy times.

Ethereum’s networking layer has been cleaned up by removing outdated fields from before the Merge. This results in faster syncing and more predictable performance.

A Big Step Toward Simpler App Logins

Fusaka adds support for the secp256r1 security method, used in iPhones, Android devices and many laptops. Previously, Ethereum apps could not use these built-in authentication systems directly.

With this upgrade, users may soon be able to log in to Ethereum apps using:

• Face ID
• Touch ID
• Fingerprint sensors
• Built-in phone security chips

This brings Ethereum apps closer to the login experience people already use daily.

Better Groundwork for Future Innovation

Fusaka includes updates that help developers build faster and more advanced applications. A new opcode improves basic math and compression tasks, and zero-knowledge proof systems benefit from increased efficiency.

These improvements work quietly in the background but support the next wave of innovation on Ethereum.

What Users & Node Operators Need to Know

Regular users do not need to take any action. Everything continues to work normally.

Node operators and validators must update their software to stay connected to the network. Those who do not update will fall out of sync.

Fusaka marks a shift in how Ethereum will scale. Instead of waiting for large upgrades, Ethereum can now expand blob capacity in smaller and safer steps.

Combined with improvements to speed, efficiency and login experience, Fusaka makes Ethereum stronger and easier to use. As blob limits rise from 9 to 15 and eventually 21, users should begin seeing lower rollup fees and smoother activity across the ecosystem.

If you find any issues in this blog or notice any missing information, please feel free to reach out at yash@etherworld.co for clarifications or updates.

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