What Is the Ethereum Fusaka Upgrade and When Is It Scheduled?

In the blockchain world, Ethereum has always been a major innovator, and this time they are bringing a significant update with the Fusaka Upgrade. This upgrade will introduce major changes in data capacity, defense against attacks, as well as new tools for developers and users.

We will explain what the Ethereum Fusaka upgrade is, when it will take place, and the differences between Ethereum before and after the upgrade. Or would you like to know about Ethereum ETF?

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What is Ethereum Fusaka Upgrade?

The Ethereum Fusaka Upgrade is a network upgrade scheduled to launch in December 2025. Fusaka focuses on enhancing data capacity, reducing attack risks, and introducing new tools that will benefit both developers and users.

Some of the major changes in Fusaka include PeerDAS (Data Availability Sampling), which allows Ethereum to handle data more efficiently, as well as changes to blob pricing and throughput settings.

Fusaka is not a small fix; it is a major step in Ethereum's evolution after previous significant upgrades like Merge in 2022 and Dencun in 2024. With Fusaka, Ethereum aims to improve scalability without overburdening users or node operators.

When is the Ethereum Fusaka Upgrade happening?

The Fusaka upgrade is scheduled to be activated on the Ethereum mainnet on December 3, 2025. Before that, various tests and trials will take place on Ethereum's testnets, including:

• Holesky Testnet on October 1, 2025
• Sepolia Testnet on October 14, 2025
• Hoodi Testnet on October 28, 2025
   

After these tests are complete, the Fusaka upgrade will be launched to the mainnet, which will enhance Ethereum's ability to handle layer-2 rollups, improve blob pricing, and introduce a more efficient PeerDAS system.

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Differences Between Ethereum Before and After Fusaka Upgrade

Here are some key differences between Ethereum before and after the Fusaka upgrade:

Before Fusaka Upgrade:

• Data in Ethereum is stored by each node, making capacity limited and more expensive.
   
• Denial-of-service attacks were more likely due to the lack of protection against very large transactions.
   
• Developers had to wait several months between upgrades to adjust capacity and throughput.
   

After Fusaka Upgrade:

• PeerDAS will ensure each node only stores a small fraction of the data, allowing Ethereum to handle up to 8 times more data throughput.
   
• More transparent and efficient blob pricing changes, along with the introduction of reserve fees to stabilize storage costs.
   
• Enhanced defense against attacks, including tighter gas caps and transaction size limits.
   

Conclusion

The Ethereum Fusaka Upgrade is a highly anticipated update that will revolutionize the way Ethereum handles data and transactions. With PeerDAS and other crucial changes, Fusaka will introduce greater scalability, better defenses, and new tools for developers.

Make sure to stay updated on the progress of the Fusaka upgrade, as it will be a significant step toward mass adoption of layer-2 solutions on Ethereum. Explore Bittime Exchange for Ethereum trading or read more crypto news on  Bittime Blog.

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FAQ

What is the Ethereum Fusaka upgrade?

Fusaka is a major upgrade to Ethereum that improves data capacity, blob management, and introduces a PeerDAS system for more efficient storage.

When is the Ethereum Fusaka upgrade being launched?

The Fusaka upgrade is scheduled to be launched on December 3, 2025, after a series of tests on Ethereum's testnets.

What will change after the Fusaka upgrade?

Fusaka will improve data capacity, provide better protection against attacks, and offer new tools for both developers and users.

What is PeerDAS?

PeerDAS is a new method of data availability sampling that allows Ethereum to handle more data without overloading nodes.

What is the impact of Fusaka on developers?

Developers will gain new tools like the CLZ opcode and native signature verification, enhancing the efficiency and compatibility of their applications.