code: func isPubkeyHash(pops []parsedOpcode) bool {
  	return len(pops) == 5 &&
  		pops[0].opcode.value == OP_DUP &&
  		pops[1].opcode.value == OP_HASH160 &&
  		pops[2].opcode.value == OP_DATA_20 &&
  		pops[3].opcode.value == OP_EQUALVERIFY &&
  		pops[4].opcode.value == OP_CHECKSIG
  
  }
docs: // isPubkeyHash returns true if the script passed is a pay-to-pubkey-hash
  // transaction, false otherwise.