Will Fusaka Be Ready in Time? Vitalik's 2025 Vision

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• What is Fusaka, PeerDAS, EOF?
• Fusaka's Race Against Time
• Who’s Working on Fusaka and What Could Go Wrong?
• Contradiction and Summary

Before we start, What is Fusaka?

Fusaka is set to be the follow-up to the current Pectra upgrade. Named after the cities Fulu and Osaka, Fusaka brings together features that are a part of Pectra. Think of it as a remix of your favorite song: it keeps the best parts you love while adding new beats to make it even more exciting. This upgrade promises major changes that could redefine how Ethereum works. Fusaka is bringing two major features namely PeerDAS and EOF.

What's after Fusaka? Read here: Glamsterdam: The Next Upgrade After Fusaka

What is PeerDAS?

One of Fusaka’s star features is Peer Data Availability Sampling, or PeerDAS. Imagine if, instead of reading every page of a long book, you could simply sample a few pages and still understand the whole story. That’s what PeerDAS does for Ethereum. Rather than having every node download all data (or “blobs”), nodes only check a small sample. This smart shortcut means the network can handle more data without needing extra bandwidth. It’s a game-changer that could make transactions smoother and faster for everyone.

Read more about PeerDAS here: The State of PeerDAS Testing: Progress, Challenges & Next Steps

What is EOF: Making the EVM Leaner and Meaner

Alongside PeerDAS, another critical upgrade is the EVM Object Format, or EOF. The Ethereum Virtual Machine (EVM) is like the engine that powers all the smart contracts on the network. EOF refines this engine by stripping away unnecessary parts, making it leaner and more efficient. In everyday terms, it’s similar to upgrading an old car with modern technology making it faster, more reliable, and easier to maintain, which benefits both developers and users.

The Race Against Time

For 2025 we need Fusaka on L1 with PeerDAS, ideally with 48/72 blob target/limit

Let's aim to get a Fusaka testnet with these blob parameters running the day after Pectra goes live.

— vitalik.eth (@VitalikButerin) March 1, 2025

Fusaka is not coming out of a lab; it’s being put through its paces on independent test networks (devnets) right now. The goal is to have a Fusaka testnet up and running immediately after Pectra goes live. Deadlines are tight: proposals for new improvements are due by mid-March, with final decisions made by early April. This aggressive timeline is exciting but also risky. When you’re racing against the clock, every bug, every misstep, and every unexpected delay counts.

Who’s Working on It and What Could Go Wrong?

Behind Fusaka’s vision are several teams from the Ethereum community: core developers, client teams like Geth and Prysm, and even groups working on Layer 2 solutions. All these teams need to work together flawlessly. However, history tells us that such massive projects can hit obstacles. For example, there are worries about state mismatches (where different parts of the network don’t agree on what’s happening) and reconstruction bugs (which can make the system lose or misplace data). Even Leadership Changes within the Ethereum Foundation could slow progress, adding another layer of uncertainty.

A Contradiction? Promising Yet Perilous

At first glance, Fusaka seems like the answer to Ethereum’s scaling challenges, a quick fix that could lower fees and speed up transactions. But the reality is more complex. It’s a delicate balance between pushing for revolutionary changes and ensuring that everything works without breaking the network. This contradictory natur, huge promise mixed with potential pitfalls keeps everyone on their toes. It’s a reminder that even the most exciting innovations come with risks.

For the everyday Ethereum user, these upgrades might seem distant or overly technical. However, the benefits are very tangible. A more efficient Ethereum could mean smoother experiences when buying NFTs, trading tokens, or using decentralized applications for everyday tasks. With fewer delays and lower costs, the impact of Fusaka could be as personal as making your daily transactions faster and more reliable.

The Final Word

Vitalik’s 2025 vision with Fusaka is as bold as it is ambitious. On one side, we have the promise of a leaner, faster, and more scalable Ethereum. On the other, the challenges of tight deadlines, technical hurdles, and the need for perfect teamwork. Whether Fusaka will be ready in time remains to be seen, but one thing is clear: this is a turning point that could redefine Ethereum for years to come.

Stay tuned, because in the world of blockchain, the next breakthrough might just be around the corner. Want to share any of your thoughts or comments, write to team@etherworld.co

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