Taiko COO talks about what Fusaka really means for Ethereum

Ethereum's face upgradeI went to a live show This reduces Layer 2 data costs, increases network capacity, and strengthens the network's core infrastructure. In addition to this, Taiko COO Joaquín Mendez said in recent comments to BSCN that this upgrade also signals a change in the way Ethereum expects rollups to work, especially rollups built around L1 sequences such as Taiko.

Fusaka improves Ethereum's data availability model, introduces deterministic proposer lookahead with EIP-7917, adjusts block parameters, and prepares the network for future rollup-heavy activity. In the case of Taiko and other L1 sequence rollups, these changes are substantial, practical, and highly technical. These affect data flow, how validators are coordinated, and how rollups confirm transactions.

What is fusaka and why is it important?

Ethereum relies on rollups for most transaction activity. When these rollups become expensive or crowded, they slow down the entire ecosystem. Fusaka addressed this issue by improving the way Ethereum handles data posted by rollups.

Fusaka's main goals are:

• Increasing the amount of Layer 2 data that Ethereum can securely process
• Reduce BLOB costs and make rollups cheaper
• Improve validator efficiency
• Strengthening spam email resistance
• Preparing Ethereum for Danksharding’s long-term roadmap

This upgrade follows an early step in Ethereum's evolution. Merge introduced proof of stake. Pectra has improved its wallet functionality and validation rules. Fusaka is currently focused on scaling Ethereum's data layer, which is the foundation for rollups like Taiko.

From Taiko's perspective, the most important elements are increased data availability and deterministic proposer lookahead. Both directly affect the behavior of L1 sequence rollups.

How will Fusaka change Ethereum's data model?

Before getting into Taiko's interpretation, it's important to understand Fusaka's core feature: PeerDAS.

introduction

PeerDAS stands for Peer Data Availability Sampling. This changes the way Ethereum validates large “BLOB” data exposed by rollups.

In front of Fusaka

All validators had to download the entire blob. This worked when the rollup produced less data, but it became a burden for homestakers with average internet connections.

After Fusaka

Validators only validate small portions of data. Through erasure coding, Ethereum can reconstruct a complete dataset even if each validator only sees a small slice.

What PeerDAS delivers

• Increase rollup data throughput by up to 8x
• Approximately 85% reduction in bandwidth usage for validators
• Greater decentralization as home stakes face smaller hardware requirements
• Quick settlement of rollup transactions

This logic is similar to checking random pages of a book instead of reading the entire book. If enough people check the various pages, everyone will know that the entire book is intact.

This is an important part of Ethereum's long-term plans. Enable large-scale rollup ecosystems to be sustainable without turning Ethereum into a system that requires data center-grade hardware.

Is Fusaka changing the role of Ethereum?

In a practical sense, Mendez says, yes. Ethereum is no longer trying to handle all execution, computation, and settlement. Instead, it positions itself as a secure base layer for data availability and consensus.

From Taiko COO Joaquin Mendez:

“L1 is no longer trying to do everything for everyone. It's becoming an infrastructure for data availability and consensus coordination, with rollups handling execution.”

This reflects the reality of today's ecosystem. The highest volume activity is already occurring in the rollup. Fusaka says rollups enhance this model by making it cheaper to post data and making it easier for validators to keep up.

But it also brings new expectations. Rollups now require reliable BLOB access. Mendes points out that this means running the Beacon client in a semi-supernode or supernode configuration. This is a trade-off. Throughput is improved, but requirements are more stringent for rollup operators that rely heavily on BLOBs.

Taiko accepts this cost because the benefits to its architecture are significant.

What does EIP-7917 do and why is it important to Taiko?

One of the most important elements of Fusaka is EIP-7917. This introduces deterministic proposer lookahead. This means that the Ethereum beacon chain knows the block proposers for the next epoch.

why is this important

Rollups can now coordinate with future block proposers instead of waiting for blocks to be included. This results in Pre-confirmation mechanismThis allows the rollup to commit to containing transactions before the actual block reaches on-chain.

Taiko COO Joaquín Mendez explains:

“With rollups, you can now commit inclusion of transactions by future validators rather than waiting for blocks to arrive, which is important, especially for base rollups.”

“Based rollup” is the use of Ethereum L1 as a sequencer. Taiko follows this model. Because Taiko relies on L1 sequences, visibility into who proposes blocks provides design benefits that other rollups cannot easily replicate.

Practical benefits of Taiko

• Advance confirmation is possible
• Sequence latency becomes more predictable
• Rollup can align its architecture with Ethereum’s timing
• Easily manage the risk of delays associated with reorganization

This is an important structural advantage for rollups built around L1 sequences.

The gradual development of fusaka and its implications

Fusaka is not a single event. This is a gradual upgrade.

• December 3rd: Fusaka activation
• December 9th: Fork for BLOB parameters only
• January 7th: Second BLOB parameter only fork

These small “parameter-only” forks allow Ethereum to increase blob capacity without performing a full hard fork. Networks can now adjust to demand more often and more easily.

Mendez highlights this as a change in the evolution of Ethereum.

“Ethereum can now iterate on DA capacity based on demand rather than waiting for major upgrades.”

This means you can plan more clearly with rollups. For Taiko, that means a predictable scale-up path that fits the L1 sequence model.

Will Fusaka affect block capacity and price stability?

Fusaka increases the effective block gas limit from approximately 36 million to approximately 60 million. It also introduces new rules for blob pricing and block size.

The main changes are:

• EIP-7918: Adjust prices for blob charges
• EIP-7934: Prevents excessive blocks
• EIP-7825: Introducing transaction gas limits within blocks

Why are these changes important?

• Rollups give you more predictable post slots
• Layer 2 pricing stabilizes
• Rapid increase in congestion will be alleviated
• Ethereum will become more reliable during periods of mass production

These mechanisms support the goal of making Ethereum a strong data availability layer rather than a bottleneck for general-purpose payments.

How Fusaka improves your everyday user experience

Most users do not need to take any direct action. But its effects will be felt throughout the ecosystem.

• Lower roll-up fees
• Fewer failed trades during market congestion
• more stable DeFi execution
• Improved application responsiveness

Biometrics and secp256r1

Fusaka added support for the secp256r1 signature scheme. This allows smartphones to sign transactions using built-in hardware security features. In the future, users may approve transactions through Face ID or a fingerprint sensor rather than entering a seed phrase.

This does not replace existing wallets, but it does give wallet developers more design options.

conclusion

Fusaka improves Ethereum's data availability, reduces rollup costs, strengthens validation, expands block capacity, and enables deterministic proposer lookahead. While these changes benefit the entire ecosystem, rollups of L1 sequences like Taiko have special benefits. This upgrade makes Ethereum's foundation more efficient and gives Taiko a clearer architectural roadmap. Fusaka is focused on increasing capabilities rather than speculation, and the effects are already shaping how Rollup prepares for the next phase of Ethereum's scaling plans.

For Taiko, Fusaka expands on the benefits of L1 sequences. Deterministic proposer lookahead, increased blob capacity, and more predictable data availability allow Taiko to improve the architecture in ways that other rollup models cannot easily copy.

resource

1. Ethereum on X:Notice (December 3rd)

2. Consensus Fusaka Dashboard:About fusaka upgrade

3. Report by Blockworks: Ethereum Fusaka upgrade released today

4. drum document: About Taiko