Overview

• Vitalik Buterin outlined PeerDAS, allowing nodes to verify data availability by sampling a few chunks and using erasure coding to recover the rest if more than half are accessible.
• Fusaka is reported to raise the per‑block blob capacity from six to nine, a change aimed at lowering rollup costs and increasing throughput for Layer 2 systems.
• The initial implementation still requires full block data to exist briefly during broadcast or reconstruction, with only one honest participant needed to perform those tasks.
• Developers are planning a phased rollout with Blob Parameter Only forks, with reported schedules increasing targets from 6/9 to 10/15 on Dec. 17 and to 14/21 on Jan. 7, 2026.
• The design builds on EIP‑7594 and emphasizes extensive testing as growing blob usage and validator storage pressure heighten the need for scalable data availability.