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Features

Base · RPCDynamic Upgrades introduces an Ethereum smart contract that stores upgrade timestamps for Base nodes, allowing nodes to query the contract and apply changes live. This change will be rolled out in metrics-only mode for Cobalt as data is collected to validate that the upgrades work smoothly.
Base · BlocksCobalt replaces Flashblocks with complete canonical blocks every 200ms. Each block has its own hash, state root, receipts, and finality lifecycle, giving applications sub-second updates through standard block and RPC streams.
Base · PrecompileCobalt brings improvements to the B20 token standard: pay transaction fees in B20s, schedule multiplier updates, transfer blocked simplification, and new Union and Intersect policies.