B20 is Base's native token standard: a template for creating new tokens that leverages code embedded in the chain itself instead of smart contracts on top. We made it to streamline compliant asset issuance and to unlock the features and performance that are critical to the long-term success of Base's economy. B20 implements the ERC-20 specification, making it interoperable with all existing systems built on ERC-20 like wallets, exchanges, data indexers, and onchain protocols. What's different is how it runs. Rather than a conventional smart contract, a B20 is a precompiled contract: its logic runs natively in the node software, written in Rust and executed directly instead of as onchain EVM bytecode. Issuers can deploy and configure tokens of all kinds: stablecoins, real-world assets, and onchain-native tokens. When deploying new tokens, we've consistently seen issuers rebuild compliance features from scratch, slowing their speed to market and introducing the risk of missteps. To accelerate issuing new high-quality assets, B20 comes with an Issuer Toolkit purpose-built for teams facing these requirements.