code: func isWitnessPubKeyHash(pops []parsedOpcode) bool {
  	return len(pops) == 2 &&
  		pops[0].opcode.value == OP_0 &&
  		pops[1].opcode.value == OP_DATA_20
  }
docs: // isWitnessPubKeyHash returns true if the passed script is a
  // pay-to-witness-pubkey-hash, and false otherwise.