B20 tokens

B20 is Base's native token standard. Unlike a normal ERC-20, it bakes issuer powers straight into the token, so LENS reads a different and more dangerous set of signals.

Why B20 needs its own scanner

A normal ERC-20 is just a deployed contract, and the risk lives in the dev's behavior. A B20 is a precompile with built-in issuer powers: the issuer can freeze and seize balances, mint without limit, pause transfers, and gate who is allowed to send or receive. These powers are part of the token itself, so a token can look perfectly fine on the surface and still let its issuer freeze your bag at will.

A deployer-history scan does not see any of this. LENS reads the powers directly off the precompile and turns them into the same CLEAR, CAUTION, STOP language.

What LENS reads

The scanner asks the B20 factory whether a contract is a B20, then reads its state directly, read-only, no key, no signature. Transfer-gating plus a seizable asset is a STOP. A paused transfer is a STOP. An uncapped supply is a CAUTION. Restricted minting is informational.

// a B20 verdict comes back on the same /lookup endpoint
{
  "found": true,
  "source": "b20",
  "symbol": "ASSET",
  "verdict": "STOP",
  "transfer_gated": true,
  "paused_transfer": true,
  "supply_capped": false
}