Opération d'octets analysant

Question

Opération d'octets analysant

4

86 2019-06-19

J'essaie d'interroger laméthode de l'opération deparse RPCet j'aitrouvé Une autre question à ce sujet . Maisje nepeuxpas comprendrepourquoi les opérations d'octets avec lesmêmes données sont différentes (58 VS 90 octets),deplus: Query:

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

Corps:

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

réponse:

 [{
        "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK",
        "contents": [{
                "kind": "transaction",
                "source": "tz1NfEiS2uJsX43vowNjau5pdqg3Nvy8whvc",
                "fee": "1274",
                "counter": "86610",
                "gas_limit": "10100",
                "storage_limit": "0",
                "amount": "5060726",
                "destination": "KT1Ec3jNXyxyA54nezwcjGDRoutECJCQjpya"
            }
        ],
        "signature": "edsigtXomBKi5CTRf5cjATJWSyaRvhfYNHqSUGrn4SdbYRcGwQrUGjzEfQDTuqHhuA8b2d8NarZjz8TRf65WkpQmo423BtomS8Q"
    }
]

Alorsj'essaie deforger ces données sans signature:

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

réponse:

 "92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000"

La réponseestbeaucoupplusgrande que les données analysées. Et sij'essaie d'ajouter à la réponse 64 oitsnuls ou des octets de signature,je reçois uneerreur "Operation.cannot_parse".

I am trying to query the RPC parse operation method and I found another question about it. But I can't figure out why operation bytes with the same data are different (58 vs 90 bytes), moreover: Query:

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

Body:

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

Response:

[{
        "branch": "BLpcXF8ADJbGuyUKNv7TypXRd5rqnoPn3PMqJLNBeRSr4VFeUuK",
        "contents": [{
                "kind": "transaction",
                "source": "tz1NfEiS2uJsX43vowNjau5pdqg3Nvy8whvc",
                "fee": "1274",
                "counter": "86610",
                "gas_limit": "10100",
                "storage_limit": "0",
                "amount": "5060726",
                "destination": "KT1Ec3jNXyxyA54nezwcjGDRoutECJCQjpya"
            }
        ],
        "signature": "edsigtXomBKi5CTRf5cjATJWSyaRvhfYNHqSUGrn4SdbYRcGwQrUGjzEfQDTuqHhuA8b2d8NarZjz8TRf65WkpQmo423BtomS8Q"
    }
]

Then I'm trying to forge this data without signature:

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

Response:

"92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000"

Response is much bigger than parsed data. And if I try to add to response 64 zero bytes or signature bytes I get "operation.cannot_parse" error.

1 réponses

votes

Klassare · Accepted Answer · 2019-06-23

3

2019-06-23

Sinousmettons les chaînes hexagonales côte à côteet découvrez oùelles correspondent,il devientfacile de voirpourquoiils diffèrent.

 __________________________Branch________________________________0800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a94000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000_____________________________________________________Signature__________________________________________________________________

Comme vouspouvez le constater que lapremière chaîne hexagonaleest composée Contenu + Signature et la seconde de branche + . Lorsquenousinjectons une opération,il devrait contenir unebranche + des contenus + une signature. Cetteforgeet cette analysene sontpasexactement les contraires des opposés de l'autre concernentprobablement avec les cas d'utilisationprévus. Forgeest quelque chose que vousfaitesgénéralement avant d'ajouter la signature,il serait donc difficile de renvoyer une signature à ce stade.

If we put the hex strings next to each other and find out where they match it becomes easy to see why they differ.

__________________________Branch________________________________0800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a94000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000_____________________________________________________Signature__________________________________________________________________

As you can see the first hex string consists of contents + signature and the second one of branch + contents. When we inject an operation, it should contain branch + contents + signature. That forge and parse isn't exactly each other’s opposites probably have to do with their intended use-cases. Forge is something you typically do before you append the signature, so it would be hard for it to return a signature at that stage.

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