Ethereum developers launched the second test of the upcoming Fusaka upgrade early Tuesday morning on the Sepolia network, marking another step toward the upgrade’s mainnet debut.
The test follows a successful launch on the Holesky testnet two weeks ago. The developers plan a final test on the Hoodi network on October 28, after which they will set a date to activate Fusaka on the main Ethereum blockchain.
Fusaka, which launched just a few months after Ethereum’s major Pectra upgrade, is designed to reduce costs for institutions using the network. One of its key features, PeerDAS, allows validators to verify only parts of data instead of entire “blobs.” This improvement reduces bandwidth demands and helps reduce costs for both Layer 2 networks and validators.
Testnets like Sepolia play a crucial role in the Ethereum development cycle, providing developers with a reliable environment to test updates under real-world conditions before they go live on the mainnet.
Holesky, however, has begun to show signs of aging and is expected to soon become obsolete. Its successor, Hoodi, launched earlier this year, is designed to more closely mirror the Ethereum mainnet. The upcoming Hoodi test is expected to be the most telling indicator of how Fusaka will perform once he becomes operational.
Read more: Ethereum to shut down its largest testnet, Holesky, after Fusaka upgrade
