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BRC-21 Tokens

BRC-21 is backwards compatible variant of BRC-20 which adds additional functions for supporting zkL2s on Bitcoin.

BRC-20 to BRC-21 Conversion​

Transfering to the null address to 1111111111111111111114olvt2(burn address), mints equivalent number of BRC-21 tokens to the sender

{ 
  "p": "brc-20",
  "op": "transfer",
  "tick": "ordi",
  "amt": "100"
}

Every BRC-20 token has an equivalent BRC-21 token, and the only way to create a BRC-21 token is to first deploy a BRC-20 token and then upgrade to BRC-21 as shown above.