Base has completed its third mainnet upgrade, adding conditional transactions and expanding B20 asset functionality.

BlockBeats news, October 1: Base has completed its third mainnet upgrade, Cobalt. The core of this upgrade is the Validity Transactions conditional transaction feature, which allows users to submit transactions with attached activation conditions. These transactions will only be included on-chain when the conditions are met; if the conditions are not fulfilled, the transaction will never be included. Base stated that this API is neutral infrastructure, and submissions from advanced traders can remain private before being finalized.

Cobalt also enhances the B20 token standard launched with the June Beryl upgrade, adding three new features. Composite Policies allow asset issuers to combine existing whitelists and blacklists using "OR" and "AND" logic, without needing to duplicate lists or maintain off-chain synchronization. The Schedule Multiplier upgrade aligns with the ERC-8056 standard, supporting issuers in presetting changes to how asset balances are displayed, which can be used for scenarios such as stock splits.

Base also revealed that in the coming months it plans to shorten block time from 2 seconds to 200 milliseconds, implement native smart accounts at the protocol layer with support for gas sponsorship and transaction batching, and introduce some EVM improvements from Ethereum's Glamsterdam upgrade.