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Ethereum Activates Fusaka Upgrade, Turning On PeerDAS and New Network Guardrails

The focus now shifts to staged blob capacity increases expected to surface fee and throughput gains gradually.

Overview

  • The upgrade went live on mainnet on December 3 at 21:49 UTC, enabling PeerDAS so nodes verify sampled blob data while storing roughly one‑eighth of it, with developers projecting up to 8x higher rollup data throughput.
  • EIP‑7825 enforces a 16,777,216 gas cap per transaction to stop any single call from filling a block, alongside guidance for a higher block gas target around 60 million.
  • Blob Parameter Forks allow capacity to be raised without a new hard fork, with follow‑up adjustments scheduled for December 9 and January 7.
  • Client teams coordinated releases across execution and consensus software, and operators who do not upgrade to the specified versions are forked off the canonical chain.
  • Wallet and user infrastructure are rolling out secp256r1 passkey support under EIP‑7951, while some analysts have issued bullish price forecasts that remain speculative.