Ethereum Fusaka Upgrade Adds PeerDAS for Layer-2 Scaling
Ethereum’s Fusaka upgrade, scheduled for December 3, 2025, introduces Peer Data Availability Sampling (PeerDAS) to enhance Ethereum scaling by enabling nodes to verify and reconstruct block data without downloading full blocks. PeerDAS uses probabilistic sampling and erasure coding, allowing nodes to securely rebuild a block when over half of its data chunks are available. This reduces network congestion while preserving security and decentralization.
Fusaka also raises blob capacity from 6–9 to 14–21 per block, accommodating demand from Layer-2 rollups such as Base (BASE), Worldcoin (WLD), Arbitrum (ARB), Optimism (OP) and Scroll. These networks currently spend over $200,000 weekly on mainnet fees. Higher blob limits aim to drive Ethereum scaling on Layer 2, potentially cutting transaction fees below $0.10.
Future phases will test cell-level messaging and distributed block building to further support long-term layer-2 growth. PeerDAS and Fusaka align with Ethereum’s roadmap to expand gas throughput to 150 million per block, paving the way for efficient, low-cost scaling across L1 and L2 layers.
Bullish
This upgrade significantly increases network capacity, reduces congestion, and lowers transaction costs, which could boost on-chain activity and demand for ETH. In the short term, anticipation of the upgrade may drive buy pressure as traders position for potential token appreciation. In the long term, improved Layer-2 scaling through PeerDAS and increased blob limits aligns with Ethereum’s roadmap, reinforcing its competitive edge and utility. Enhanced throughput to 150 million gas per block and future features like cell-level messaging can attract more DeFi and dApp usage, supporting sustained demand for ETH. Historical network upgrades that improved scalability have typically led to positive price movements, so the market outlook is bullish.