Como usar o endpoint de operações de parse RPC

Question

Como usar o endpoint de operações de parse RPC

8

178 2019-05-07

Euestoutentando consultar o RPC Parse Operation Endpoint

A documentação RPC afirma apenas queesteendpoint Parse operationse eunão consigoencontrar oexemplo de como usá-lona web.

O queeu sou como objetivofazer ébasicamente reverter o que o Forge Endpoint afim de obter a JSON de uma operação codificada hex.

Aquiestão aetapa queestou usandopara consultar oendpoint:

Forge Operação

consulta:

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

corpo:

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

Resposta:

 "92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000"

Agoratentandoinverter a operaçãoforja

consulta:

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

corpo:

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

Resposta:

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

é a operação deparse Endpoint realmentefazendo o queeuespero? Se assim comoesseendpoint deve ser consultadopara reverter oendpoint Forge?

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 responda

votos

Tom · Accepted Answer · 2019-05-10

5

2019-05-10

Oproblema é que/analise/operaçõesespera operações assinadas.Vocêpode apenas adicionar 64 zerobytes aofinal:

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

Esteja advertido que,se você confiana saída desses rpcs,você é confiandononó .

Observetambém que a opção "Check_signature"para/Analisar/Operaçõesnãotem efeito,como vocêpode ver,definindo-a como verdadeira ...

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...

fonte
Tom

Vocêpoderia dar umexemplo completo disso,fazendo umaforja,sinale depois analisar?Mesmo depois de adicionar os 0,aindanão consigofazerparsefuncionar.

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
Eu acho que apergunta + resposta dá umexemplo completo,possoexpandir a respostaem algummomento.Dois cheques rápidos: você adicionou 128 zeros (=64bytes zero)?Vocêtirou osprimeiros 32bytes (64 caracteres) daforja,que são o hash defilial/bloco?(Eunão conseguimencionarissonaminha resposta.)

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
Osexemplos acima lidam com as operações detransferênciae euestavatentando decodificar umendosso.Eles são umpouco diferentes.Eu conseguitrabalhar depois de ler alguns outrospostse o código Ocaml.Obrigado

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