Opcodes · reserved · reserved

OP_UNKNOWN191 (0xbf)

Undefined. A script fails if it executes this byte. The introspection CHIP left 0xbd–0xbf open for future formatting or nullary introspection operations.

Verified
Stack in → out
∅ → (fails)
Since
Never assigned
Bitcoin status
Not in Bitcoin (BTC)In Tapscript (BIP-342) this byte is an OP_SUCCESSx code reserved for future soft forks.

Sources

  1. Libauth BCH_2023_05 opcodes (bch-2023-opcodes.ts)
  2. CHIP-2021-02 Native Introspection Opcodes
  3. BCHN opcode list (script.h)