Coinbase’s Ethereum Layer 2 chain Base — now rebranded to Base Chain — rolled out a new feature on Wednesday, July 16, that lets on-chain apps show transaction status in near real time to make them feel more responsive.

Built by Flashbots, Flashblocks introduce “preconfirmation blocks,” which are small sub-blocks issued every 200 milliseconds by the block builder. Base app —which rebranded from Coinbase Wallet yesterday as well — posted on X that the update cuts Base Chain’s block times from two seconds to 200 milliseconds, making it 10 times faster than before.

The update allows on-chain apps to detect whether a transaction is likely to be included in the next full block, giving users quicker feedback without changing how the blockchain settles data.

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