The Ethereum Layer 2 solution Base has activated the B20 standard on its mainnet for launching stablecoins, RWA, and other fungible tokens.
https://twitter.com/buildonbase/status/2074526661186625557
B20 includes built-in mechanisms for controlling issuance and circulation: access roles, supply limits, transfer rules, minting and burning functions, operation pauses, and transaction notes.
B20 tokens are compatible with assets on the ERC-20 standard, ensuring support from existing wallets and trading platforms.
The Base mechanism offers two options — Asset and Stablecoin. The former allows for 6-18 decimal places, while the Stablecoin uses a fixed six decimal places and requires specifying a fiat currency denomination, such as the US dollar or euro.
B20 is part of the Beryl upgrade, which developers activated on the mainnet on June 25, 2026. This update reduced the finalization window for regular withdrawals from seven to five days and introduced the Reth V2 client iteration.
On June 25 and 26, Base experienced two block production halts lasting 116 and 20 minutes, respectively. In a postmortem, the team attributed both incidents to a bug in the sequencer logic.
As a reminder, in February, the network developers announced a transition from the Optimism tech stack to their own unified architecture.