Inside Ethereum’s Fusaka Hard Fork: PeerDAS, New Gas Limits, and the Road to Cheaper L2s
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This story was originally published on HackerNoon at: https://hackernoon.com/inside-ethereums-fusaka-hard-fork-peerdas-new-gas-limits-and-the-road-to-cheaper-l2s.
Ethereum’s Fusaka hard fork adds PeerDAS, new gas and block limits, and cryptography upgrades to make rollups cheaper and nodes more efficient.
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Fusaka is Ethereum’s next major hard fork after Pectra, targeting Dec. 3, 2025 and bundling a dozen EIPs focused on scalability, safety, and cryptography. PeerDAS (EIP-7594) introduces peer-based data availability sampling so nodes only verify small slices of blob data, cutting bandwidth while unlocking more capacity for rollups. Supporting EIPs tighten MODEXP safety and pricing, cap per-transaction gas usage, bound blob fees to execution costs, enforce an RLP block size limit, add a CLZ opcode, and ship a secp256r1 precompile so modern hardware keys can sign securely. Together, these changes push Ethereum toward a cheaper, more data-rich, rollup-centric future that still remains accessible to home stakers and full nodes.