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Cobalt adds native account abstraction with EIP-8130, makes improvements to the B20 token standard, and introduces dynamic node upgrades.

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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. The EL and CL each run an upgrade-signal poller that watches the contract and activates forks without requiring a client release.
EIP · AccountsEIP-8130 will bring Native Account Abstraction to Base and allow us to keep transactions opinionated and optimizable. Compared to the previous generation of Smart Accounts, we’ve been able to dramatically reduce transaction overhead.
Base · PrecompileCobalt will bring the following improvements to the B20 token standard: Pay transaction fees in B20s: as part of our rollout of EIP-8130, users will be able to pay transaction fees in B20s. Schedule Multiplier Updates: allows issuers to schedule token multiplier changes in advance.