Cómo utilizar el punto final de las operaciones de análisis rpc

Question

Cómo utilizar el punto final de las operaciones de análisis rpc

8

178 2019-05-07

Estoyintentando consultarel RPC puntofinal de la operación de análisis

La documentación de RPC soloindica queestepuntofinal Parse operations yparece quenopuedoencontrarejemplos de cómo usarloen la web.

Lo quepretendo haceresbásicamente revertir lo que forjarpuntofinal hace para obtenerel JSON de una operación con codificación hexadecimal.

Esteeselpaso queestoy usandopara consultarelpuntofinal:

Operación deforja

Consulta:

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

Cuerpo:

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

Respuesta:

 "92122a7e654cdff09e22a7be1b7d41bd279ffa197a0137e6fea0d3ed3ce95fc00800002122d44d997e158c36c60649d198c4175dad425efa09d2a405f44e00f6f0b40201420eaa410ac21addf427211cddd6115cba385a940000"

Ahoraintento revertir la operación deforja

Consulta:

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

Cuerpo:

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

Respuesta:

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

¿Elpuntofinal de la operación de análisis realmenteestá haciendo lo queespero? Sies así,¿cómo se debe consultarestepuntofinalpara revertirelpuntofinal deforja?

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 respuesta

votos

Tom · Accepted Answer · 2019-05-10

5

2019-05-10

Elproblemaes que/parse/operationsespera operacionesfirmadas.Puede agregar 64bytes cero alfinal:

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

Tengaen cuenta que si confíaen la salida deestos RPC,está confiandoen elnodo .

Observetambién que la opción "check_signature"para/parse/operationsnotiene ningúnefecto,comopuede ver si loestableceen verdadero ...

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...

fuente
Tom

¿Podría dar unejemplo completo deesto,haciendo unafragua,firmar y luego analizar?Incluso después de agregar los 0,todavíanopuedo hacer queel análisisfuncione.

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
Supongo que lapregunta + respuesta da unejemplo completo,podría ampliar la respuestaen algúnmomentomástarde.Dos comprobaciones rápidas: ¿ha añadido 128 ceros (=64 cerobytes)?Quitó losprimeros 32bytes (64 caracteres) deforge,¿cuáles sonel hash de rama/bloque?(Nomencionéesoen mi respuesta).

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
Todos losejemplos anteriorestratan de operaciones detransferencia yestabatratando de decodificar un respaldo.Son unpoco diferentes.Pude hacerlofuncionar después de leer algunas otraspublicaciones yel código ocaml.Gracias

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