1/ The Fusaka upgrade is coming December 3rd.
Ethereum is securely scaling.
Are you ready to support the changes?
Here’s what developers across the ecosystem need to do to prepare 🧵
2/ L2 & Rollup Devs
PeerDAS unlocks up to 8x data throughput, meaning cheaper blob fees and faster confirmations
Get ready: Update your pricing, test PeerDAS on devnets, and prepare your infrastructure for BPO forks
Important dates to start using increased capacity: BPO1 Dec 9th & BPO2 Jan 7th
Schedule here: blog.ethereum.org/2025/11/06/fus…
3/ App & DeFi Devs
Fusaka will bring lower transaction costs and "instant-feel" UX via based pre-confirmations
How to prep: Re-benchmark critical paths for CLZ opcode efficiencies, plan for new RLP size limits, and integrate pre-conf APIs
Key change: EIP-7825 introduces a per-transaction gas limit cap of 2^24. Verify that your contracts and transaction builders conform to the new cap.
Details here: blog.ethereum.org/2025/10/21/fus…
4/ Wallet & User Infra Devs
The R1 curve and EIP-7951 are unlocking secure mobile-native passkeys and simpler signatures
Your role: Start building secp256r1 signing flows, ship updated passkey UX, and start tracking adoption on leaderboards
5/ Protocol Infra Devs
Fusaka brings higher gas limits (45M → 60M) and improved telemetry (EIP-7910) to strengthen upgrade confidence
To do: Benchmark performance under the new limits, test history expiry, and contribute your post-mortem metrics
6/ Ready to get started with your Fusaka upgrade prep?
Learn more about the upgrade: ethereum.org/roadmap/fusaka
Review features in the current fork: forkcast.org/upgrade/fusaka/
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