Introducing Base Denim

Base has launched its fourth upgrade, Denim, on mainnet, replacing flashblocks with native 200ms blocks that produce five complete canonical blocks every second. The upgrade introduces BaseTime to give smart contracts millisecond-resolution timestamps and delivers B20 improvements for safer transfers and compliance controls. Applications consuming flashblocks must migrate to the new canonical block streams, and developers should review code that relies on block counts for time measurement. Open article →