Base completes Cobalt upgrade: new tokenized asset conditional trading and issuer control

Base has completed the Cobalt upgrade, adding conditional trading and issuer control tools for tokenized assets. This upgrade expands the B20 token standard, allowing issuers to set multiple compliance checks for the same asset, including identity verification, accredited investor status, and sanctions list screening.

Issuers can pre-set adjustments for corporate actions such as stock splits, updating the number of shares displayed in wallets and applications without issuing new tokens, burning tokens, or changing the underlying balance. Issuers can also authorize administrators to transfer tokens without the approval of holders and attach public explanations; Base cannot initiate such transfers.

Cobalt introduces Validity Transactions, allowing users to set on-chain conditions before submitting transactions, for example, allowing exchanges only if the asset reaches a target price before a specified block deadline. Such transactions can remain private before being included in a block. Base enabled B20 as the native standard for stablecoins and homogenized tokens representing tokenized real-world assets on July 8; Coinbase issued B20 tokens representing stocks of Apple, Nvidia, Meta, and Alphabet on Base on August 25.