Comment utiliser le point d'extrémité des opérations d'analyse RPC

Question

Comment utiliser le point d'extrémité des opérations d'analyse RPC

8

178 2019-05-07

J'essaie d'interroger le RPC Parse Operation Endpoint

La documentation RPCn'indique que cepointfinal Parse operationset jene peuxpas semblertrouver d'exemple de lamanière de l'utiliser sur le Web.

Qu'est-ce queje suis àfaire,c'estfondamentalementinverser ce que le Point defin de Forge fait Afin d'obtenir le JSON àpartir d'une opération codée hexagone.

Voici l'étape quej'utilisepourinterroger lepointfinal:

Forge Operation

Query:

 POST
https://alphanet-node.tzscan.io/chains/main/blocks/head/helpers/forge/operations

Corps:

 {
    "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK",
    "contents": [
        {
            "kind": "transaction",
            "source": "tz1NfEiS2uJsX43vowNjau5pdqg3Nvy8whvc",
            "destination": "KT1Ec3jNXyxyA54nezwcjGDRoutECJCQjpya",
            "fee": "1274",
            "counter": "86610",
            "gas_limit": "10100",
            "storage_limit": "0",
            "amount": "5060726"
        }
    ]
}

réponse:

 "92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000"

essayantmaintenant d'inverser l'opération deforge

Query:

 https://alphanet-node.tzscan.io/chains/main/blocks/head/helpers/parse/operations

Corps:

 {
    "operations": [
        {
            "data": "92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000",
            "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK"
        }
    ]
}

réponse:

 [
    {
        "kind": "branch",
        "id": "proto.003-PsddFKi3.operation.cannot_parse"
    }
]

est lepoint d'extrémité de l'opération d'analysefait vraiment ce quej'attends? Si oui,comment ce chiffre d'extrémité doit-il êtreinterrogépourinverser lepointfinal deforge?

I am trying to query the RPC parse operation endpoint

The RPC documentation only states that this endpoint Parse operations and I can't seem to find example of how to use it on the web.

What I am aim to do is basically reverse what the forge endpoint does in order to get the JSON from an hex encoded operation.

Here are the step I am using to query the endpoint:

Forge operation

Query:

POST
https://alphanet-node.tzscan.io/chains/main/blocks/head/helpers/forge/operations

Body:

{
    "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK",
    "contents": [
        {
            "kind": "transaction",
            "source": "tz1NfEiS2uJsX43vowNjau5pdqg3Nvy8whvc",
            "destination": "KT1Ec3jNXyxyA54nezwcjGDRoutECJCQjpya",
            "fee": "1274",
            "counter": "86610",
            "gas_limit": "10100",
            "storage_limit": "0",
            "amount": "5060726"
        }
    ]
}

Response:

"92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000"

Now trying to reverse the forge operation

Query:

https://alphanet-node.tzscan.io/chains/main/blocks/head/helpers/parse/operations

Body:

{
    "operations": [
        {
            "data": "92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000",
            "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK"
        }
    ]
}

Response:

[
    {
        "kind": "branch",
        "id": "proto.003-PsddFKi3.operation.cannot_parse"
    }
]

Is the parse operation endpoint really doing what I expect? If so how should this endpoint need to be queried to reverse the forge endpoint?

1 réponses

votes

Tom · Accepted Answer · 2019-05-10

5

2019-05-10

Leproblèmeest que/parse/opérations attend des opérations signées.Vouspouvez simplement ajouter 64notes d'octets à lafin:

 {
    "operations": [
        {
            "data": "0800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a94000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
            "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK"
        }
    ]
}

Être averti que si vousfaites confiance à la sortie de ces RPCS,vous êtes faire confiance aunoeud .

remarquez également que l'option "Check_Signature"pour/d'analyse/opérationsn'a aucuneffet,comme vouspouvez le constateren le définissant sur TRUE ...

The problem is that /parse/operations expects signed operations. You can just add 64 zero bytes to the end:

{
    "operations": [
        {
            "data": "0800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a94000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
            "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK"
        }
    ]
}

Be warned that if you trust the output of these RPCs, you are trusting the node.

Also notice that the "check_signature" option for /parse/operations has no effect, as you can see by setting it to true...

Pourriez-vous donner unexemple complet de cela,faire uneforge,un signe,puis l'analyse?Même après avoir ajouté les 0,je nepeuxtoujourspasfairefonctionner.

Could you give a complete example of this, doing a forge, sign, then parse? Even after adding the 0's, I still cannot get parse to work.
- 0
- 2019-09-17
- utdrmac
Je suppose que la réponse de la question + donne unexemple complet,je pourrais élargir la réponseplusieursfoisplustard.Deux vérifications rapides: vous avez ajouté 128 zéros (=64notes d'octets)?Vous avez dépassé les 32premiers octets (64 caractères) de Forge,qui sont labranche/bloc deblocage?(Jen'aipasmentionné cela dansma réponse.)

I guess the question + answer gives a complete example, I might expand the answer sometime later. Two quick checks: You added 128 zeros (= 64 zero bytes)? You stripped off the first 32 bytes (64 characters) from forge, which are the branch / block hash? (I failed to mention that in my answer.)
- 0
- 2019-09-18
- Tom
Lesexemples ci-dessustraitenttoutes des opérations detransfertet j'essayais de décoder une approbation.Ils sont unpeu différents.J'aipu lefairefonctionner après avoir lu d'autresposteset code OCAML.Merci

The above examples all deal with transfer operations and I was trying to decode an endorsement. They are a bit different. I was able to get it working after reading some other posts and ocaml code. Thanks
- 0
- 2019-09-19
- utdrmac