Ethereum’s Fusaka Upgrade Achieves Long-Awaited Sharding Breakthrough

Key Points:

  • Ethereum’s Fusaka upgrade introduces sharding, reducing L2 fees by up to 60%.
  • Sharding enhances scalability, closing a decade-long roadmap gap.
  • PeerDAS optimizes data sampling, mitigating 51% attack risks.

Ethereum co-founder Vitalik Buterin announced the successful Fusaka upgrade, integrating PeerDAS, a decade-long objective in blockchain scalability, enhancing Ethereum’s sharding capability.

This systemic improvement promises significant transaction efficiency and reduced costs, positioning Ethereum for enhanced viability amidst a competitive cryptocurrency landscape.

Ethereum’s Fusaka Upgrade: Sharding Milestone and Fee Reductions

The Ethereum Fusaka upgrade, celebrated by Vitalik Buterin, includes the implementation of PeerDAS and marks a major step forward as Ethereum achieves its long-standing sharding capability. This enables consensus without needing any node to process full block data and employs client-side probabilistic verification.

Transaction efficiency saw a boost, notably reducing Layer 2 network fees by an estimated 40–60%. However, Layer 1 remains constrained by current technological limits, necessitating further advancements in zero-knowledge EVM and Layer 1 capacity.

Market reactions have been positive, with developers and the community expressing optimism over the advancements. Buterin stated, “Ethereum is progressing towards true sharding, essential for continued scalability.” The focus now shifts to refining PeerDAS and expanding blockchain throughput.

“PeerDAS in Fusaka is significant because it literally is sharding. Ethereum is coming to consensus on blocks without requiring any single node to see more than a tiny fraction of the data. And this is robust to 51% attacks—it’s client-side probabilistic verification, not validator voting.” — Vitalik Buterin, Source

Historical Achievements and Current Market Impact

Did you know? The Ethereum Fusaka upgrade once thought to be a distant vision has now actualized sharding, an ambition dating back over a decade to its conception in 2015.

Ethereum (ETH) is trading at $3,159.31, holding a $381.31 billion market cap and a 12.12% market dominance. Over 24 hours, Ethereum’s value increased by 0.88%. Despite progress, there have been declines: -30.03% over 60 days and -26.52% over 90 days, per CoinMarketCap.

ethereum-daily-chart-2140

Ethereum(ETH), daily chart, screenshot on CoinMarketCap at 18:30 UTC on December 4, 2025. Source: CoinMarketCap

The Coincu research team highlights that the Fusaka upgrade could significantly influence Ethereum’s infrastructure, paving the way for enhanced scalability on Layer 2. Economic models predict lower transaction fees, benefitting users globally, fostering higher Ethereum application adoption in financial technology sectors.

Source: https://coincu.com/ethereum/ethereum-fusaka-upgrade-sharding/