Ethereum developers began a second test of the upcoming Fusaka upgrade on the Sepolia network early Tuesday morning, taking another step toward the upgrade’s mainnet debut.
This test follows a successful rollout on the Holesky testnet two weeks ago. The developers are planning a final rehearsal on the Hoodi network on October 28th, after which they will set a date to activate Fusaka on Ethereum’s main blockchain.
Coming just months after Ethereum’s major Pectra upgrade, Fusaka is designed to reduce costs for institutions using the network. One of its key features, PeerDAS, allows validators to validate only a portion of the data rather than the entire “BLOB”. This improvement reduces bandwidth demands and helps reduce costs for both the Layer 2 network and validators.
Testnets like Sepolia play an important role in Ethereum’s development cycle, providing developers with a reliable environment to test upgrades under real-world conditions before going live on the main network.
However, Holesky is beginning to show signs of aging and is expected to be retired soon. Its successor, Hoodi, launched earlier this year, is designed to more closely mirror Ethereum’s mainnet. Future tests of the Hoodi are expected to be the clearest indicator of Fusaka’s performance once it goes into production.
Read more: Ethereum shuts down its largest testnet Holsky after Fusaka upgrade
