Base completed its third mainnet upgrade, Cobalt, introducing Validity Transactions for conditional on-chain submissions and expanding the B20 token standard with composite policies and schedule multiplier features. The upgrade enhances privacy for advanced traders and asset issuers while Base plans further improvements including faster block times and native smart accounts.
Coinbase's Layer 2 network Base launched Cobalt, its third upgrade of 2026, introducing Validity Transactions for flexible transaction inclusion control and three B20 token standard enhancements including composite policies, scheduled multiplier updates, and seizeWithMemo functionality for balance redistribution.
Base completed its Cobalt upgrade, adding conditional transactions and new issuer controls for tokenized assets on the Ethereum layer-2 network. The upgrade expands the B20 token standard with compliance checks, corporate action tools like stock splits, and allows authorized administrators to transfer tokens. Validity Transactions enable traders to submit swaps that execute only when specified onchain conditions are met.