Base unveils Vibenet with 200ms preconfirmations, native account abstraction, and cheaper transactions

Coinbase’s Base network has quietly opened one of its most consequential testing grounds to date. Vibenet, an ephemeral developer preview network with chain ID 84538453, is now live and running three features that could meaningfully reshape how Base performs at the protocol level. The three features are fast block confirmation, validity transactions, and native account abstraction. Each one addresses a long-standing friction point in Ethereum Layer-2 user experience, and Base is letting developers poke at all three simultaneously before any of it touches Sepolia or mainnet. What Vibenet is actually doing The headline number is 200 milliseconds. That is how fast Vibenet is delivering block preconfirmations, which is the point at which a user can be reasonably confident their transaction is going through. To get there, Base built a system called Flashblocks in collaboration with Flashbots. Rather than waiting for a full 2-second block to close, Flashblocks delivers 10 incremental state updates within each 2-second window, each one arriving 200ms after the last. The current Flashblocks approach is a bridge. The more significant milestone is the Denim upgrade, which Base is targeting f...