What changed with ETH Fusaka now?

TLDR

Ethereum (ETH) just activated the Fusaka upgrade on mainnet, introducing PeerDAS, higher block capacity, and staged blob increases to cut Layer 2 data costs and raise throughput, effective Dec 3 (UTC) per a market update.

1. PeerDAS enables more blobs and cheaper rollup data, with base?fee tuning to stabilize costs per an official post.
2. Block gas target rises to 60M and single?transaction gas is capped at ~16.8M, improving resilience per a technical brief.
3. Blob capacity steps up again on 9 Dec and 7 Jan to boost L2 throughput per the schedule.

Deep Dive

1. PeerDAS and Lower L2 Costs

PeerDAS (EIP?7594) lets nodes verify sampled portions of blob data rather than full blobs, unlocking significantly more throughput for rollups and lowering data availability costs.

1. Ethereum outlines 8x blob capacity potential and blob base?fee tuning to stabilize pricing in the official post.
2. Media explain PeerDAS as the centerpiece of Fusakas scaling impact on rollups and node requirements in a feature.

2. Throughput and Safety Changes

Fusaka lifts the block gas target to 60M and introduces protective limits, making block composition more predictable and reducing denial?of?service risk.

1. The per?transaction gas ceiling is ~16.8M (2^24), and client teams prepared for higher data flow per a briefing.
2. Additional EIPs tighten execution limits and add modern cryptography (secp256r1) for passkey logins, improving developer and wallet UX per an overview.

3. Rolling Activations and Timing

Beyond the mainnet cutover on Dec 3, blob capacity increases in two steps to avoid shocks and validate stability under real load.

1. Blob targets move from 6/9 to 10/15 on Dec 9, then to 14/21 on Jan 7 per the schedule.
2. Coverage highlights gradual capacity ramps and why this upgrade focuses on backend scaling rather than flashy UX per a market update.

Conclusion

Fusaka changes how Ethereum handles rollup data and block capacity, aiming for lower L2 costs and higher throughput while tightening execution safety. The staged blob increases should translate into smoother, cheaper Layer 2 activity as the network validates the upgrades under real demand.