What did ETH Fusaka change?

TLDR

Ethereum (ETH) just shipped the Fusaka upgrade. It adds PeerDAS to scale data for rollups, raises the L1 gas limit to 60M, and introduces usability and fee mechanics that strengthen the networks settlement role per the official thread.

1. PeerDAS enables data availability sampling for blobs, cutting validator load and lowering Layer 2 costs over time per CryptoSlate.
2. L1 gas limit is set to 60M (EIP?7935), boosting throughput and room for complex transactions per the official thread.
3. New features include secp256r1 precompile, deterministic proposer lookahead, CLZ opcode, and a blob fee floor (EIP?7918) per Finance Yahoo.

Deep Dive

1. PeerDAS and Rollup Scaling

PeerDAS lets nodes verify data by sampling small pieces instead of downloading full blobs, removing a key bottleneck introduced by earlier blob mechanics. That widens the channel for rollups to post batches and tends to reduce their fees over time.

1. The upgrades core is PeerDAS (EIP?7594), enabling efficient blob verification and lower L2 costs as blob capacity expands per CryptoSlate.
2. Ethereum notes gradual blob parameter increases (BPO) to scale safely, aligning fees and capacity per the official thread.

2. Gas Limit and Throughput

Fusaka raises the L1 block gas limit to 60M (EIP?7935), creating room for more transactions and heavier computation while maintaining safety through benchmarking and related repricing changes.

1. The 60M limit increases throughput and supports complex workloads (with per?transaction caps to preserve safety) per the official thread.
2. Developers emphasized that improvements materialize over months as parameters are tuned, not in a single day per Finance Yahoo.

3. UX, Security, and Economics

Fusaka adds an R1 signature precompile (secp256r1) for passkeys and hardware?backed auth, deterministic proposer lookahead for fast preconfirmations, and the CLZ opcode for cheaper bytecode. It also introduces a blob base?fee floor (EIP?7918) to tie blob costs to execution fees and improve value accrual.

1. R1 precompile, proposer lookahead, and CLZ improve app UX, latency, and dev ergonomics per the official thread.
2. A blob fee floor aligns resource use with fees and feeds more consistent ETH burn from data activity per Binance Square.

Conclusion

Fusaka is a scaling?first upgrade that increases Ethereums capacity and predictability without sacrificing decentralization. The big practical effects show up on L2s (lower fees, more data capacity) and on L1 (higher throughput, better UX), with parameters ramping gradually for safety.