Opcodes · token · enabled

OP_UTXOTOKENCOMMITMENT (0xcf)

Pushes the NFT commitment of the UTXO spent by input i. Pushes 0 if there is no NFT or the commitment is empty.

Verified
Stack in → out
i → commitment | 0
Since
May 2023: CashTokens, P2SH32 and smaller transactions
Cost
Base instruction cost 100 plus the byte length of the pushed result (2025 VM limits).
Bitcoin status
Not in Bitcoin (BTC)BTC has no native tokens. In Tapscript (BIP-342) this byte is an OP_SUCCESSx code reserved for future soft forks.

Example

OP_INPUTINDEX OP_UTXOTOKENCOMMITMENT OP_0 OP_OUTPUTTOKENCOMMITMENT OP_EQUAL

Step through it opcode by opcode in Bitauth IDE, the in-browser BCH VM debugger.

Sources

  1. CHIP-2022-02 CashTokens: Token Primitives for Bitcoin Cash
  2. Libauth BCH_2023_05 opcodes (bch-2023-opcodes.ts)