Fusaka Upgrade: A new technological leap reshaping the future of the Ethereum network
On December 3, 2025, the Fusaka upgrade was activated on the Ethereum mainnet, marking it as the second most important update of the year after Pectra. The upgrade had a clear focus on increasing efficiency, reducing costs, and enhancing the network's ability to handle the accelerated use of scaling layers.
Upgrade essence
Fusaka doubles the capacity of blobs — temporary data storage packages — at a progressive rate of up to eight times, meaning noticeable reductions in transaction costs on layer two networks and a direct improvement in data transfer rates. The addition of PeerDAS gives the network a smarter way to distribute data storage, while the biometric signature mechanism allows for means such as facial recognition to confirm transactions, raising the level of security against DoS attacks.
Within the timeline, the network will witness a minor upgrade on December 9 to increase capacity to 15 blobs per block, and another upgrade on January 7 to raise it to 21 blobs, as part of a calculated, gradual approach to expanding capacity without disruption.
Market effects
The update had an immediate impact on network and price activity. ETH rose above $3200 alongside the addition of 190,000 new wallets in a single day, indicating a clear increase in user confidence and accumulation of large holdings, especially with ongoing ETF fund inflows.
Fusaka lays the groundwork for larger upgrade series, the most prominent being Glamsterdam in 2026, which aims to raise the network's capability to an ambitious level of one trillion transactions per day — a step that positions Ethereum within the realm of true global financial infrastructure.
The impact of these upgrades is not immediately reflected in price alone, but in the liquidity dynamics within layer two networks.$ETH ; cost reductions redistribute activity towards protocols that were previously inefficient (the inefficient protocols previously referred to are the set of applications and projects on Layer 2 or Layer 3 networks that had a theoretically excellent idea but practically failed because the cost of using Ethereum was higher than the benefits it provided), creating new waves of adoption without noise.
