Est-il possible d'avoir une opération de transaction dans les "contenus" de toute opération?

Cette question concerne le contenu d'une opération dans les réponses de l'API dunoeud. J'essaie d'identifiertoutes lestransactions dans une opération donnée.

Devrais-jetoujoursnumériser destransactions à chaque opération renvoyéepour unbloc ou y a-t-il des scénarios où cen'estpaspossible?

Parexemple,est-ilpossiblepour une opération avec une approbation d'inclure unetransaction dans son contenu? Voici un échantillon JSON quej'aifabriquépour représenter l'exemple:

 {
  "protocol": "PsddFKi32cMJ2qPjf43Qv5GDWLDPZb3T3bF6fLKiF5HtvHNU7aP",
  "chain_id": "NetXgtSLGNJvNye",
  "hash": "ooUykPzNucdysptCM4FKVhSW9k3WcXFKYhBy9GGTGfPZd7VrByR",
  "branch": "BLScMeAbnkVCfWpqSL26yS7nymoc5pHibXPaG8vAiY8NijPs8ph",
  "contents": [
    {
      "kind": "endorsement",
      "level": 202960,
      "metadata": {
        "balance_updates": [
          {
            "kind": "contract",
            "contract": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
            "change": "-128000000"
          },
          {
            "kind": "freezer",
            "category": "deposits",
            "delegate": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
            "level": 99,
            "change": "128000000"
          },
          {
            "kind": "freezer",
            "category": "rewards",
            "delegate": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
            "level": 99,
            "change": "2000000"
          }
        ],
        "delegate": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
        "slots": [
          13,
          12
        ]
      }
    },
    {
      "kind": "transaction",
      "source": "tz1NKVAxzJusWgKewn4LEViPSQVRE5Kg6XFV",
      "fee": "0",
      "counter": "2",
      "gas_limit": "105968",
      "storage_limit": "0",
      "amount": "0",
      "destination": "KT1WPEis2WhAc2FciM2tZVn8qe6pCBe9HkDp",
      "parameters": {
        "prim": "Right",
        "args": [
          {
            "prim": "None"
          }
        ]
      },
      "metadata": {
        "balance_updates": [],
        "operation_result": {
          "status": "applied",
          "storage": {
            "prim": "Pair",
            "args": [
            ]
          },
          "consumed_gas": "105868",
          "storage_size": "5157"
        }
      }
    }
  ],
  "signature": "signoVkqnvViqwNSpdf8fykaguasvzCxWYQry5hPT5nciAoFYRGxsRBTLDxeeDbVDQGGtyGJGazPtWJXiXZ9pi7hjeiJMnct"
}
 

This questions is about the contents of an operation in the API responses from the node. I'm trying to identify all transactions in a given operation.

Should I always scan for transactions in every operation returned for a block or are there some scenarios where that isn't possible?

For example, is it possible for an operation with a endorsement to include a transaction in its contents? Here's a sample JSON that I made up to represent the example:

{
  "protocol": "PsddFKi32cMJ2qPjf43Qv5GDWLDPZb3T3bF6fLKiF5HtvHNU7aP",
  "chain_id": "NetXgtSLGNJvNye",
  "hash": "ooUykPzNucdysptCM4FKVhSW9k3WcXFKYhBy9GGTGfPZd7VrByR",
  "branch": "BLScMeAbnkVCfWpqSL26yS7nymoc5pHibXPaG8vAiY8NijPs8ph",
  "contents": [
    {
      "kind": "endorsement",
      "level": 202960,
      "metadata": {
        "balance_updates": [
          {
            "kind": "contract",
            "contract": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
            "change": "-128000000"
          },
          {
            "kind": "freezer",
            "category": "deposits",
            "delegate": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
            "level": 99,
            "change": "128000000"
          },
          {
            "kind": "freezer",
            "category": "rewards",
            "delegate": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
            "level": 99,
            "change": "2000000"
          }
        ],
        "delegate": "tz1YCABRTa6H8PLKx2EtDWeCGPaKxUhNgv47",
        "slots": [
          13,
          12
        ]
      }
    },
    {
      "kind": "transaction",
      "source": "tz1NKVAxzJusWgKewn4LEViPSQVRE5Kg6XFV",
      "fee": "0",
      "counter": "2",
      "gas_limit": "105968",
      "storage_limit": "0",
      "amount": "0",
      "destination": "KT1WPEis2WhAc2FciM2tZVn8qe6pCBe9HkDp",
      "parameters": {
        "prim": "Right",
        "args": [
          {
            "prim": "None"
          }
        ]
      },
      "metadata": {
        "balance_updates": [],
        "operation_result": {
          "status": "applied",
          "storage": {
            "prim": "Pair",
            "args": [
            ]
          },
          "consumed_gas": "105868",
          "storage_size": "5157"
        }
      }
    }
  ],
  "signature": "signoVkqnvViqwNSpdf8fykaguasvzCxWYQry5hPT5nciAoFYRGxsRBTLDxeeDbVDQGGtyGJGazPtWJXiXZ9pi7hjeiJMnct"
}