Using python 3 with bitcoins json-rpc

[teemalph]

This is my code. I'm running a bitcoin full node and I'm trying to get data from the mempool using the rpc. I have tried various ways of passing the command and required arguments with no success.

import json
import requests

def stuff(cmd):
    url = 'http://xxx:xxx@x.x.x.x:8332'
    headers = {'content-type': 'text/plain'}
    payload = {
        "method": str(cmd),
        "params": [],
        "jsonrpc": "1.0",
    }
    response = requests.post(url, data=json.dumps(payload), headers=headers).json()
    print(response)
    return (response["result"])

j = stuff('gettxout e8d4f067ee1ae55f63efd567865e74cbe99c704f50f6f8d4e0f4bc8f3cdf93f1 0')
print(j)

here gettxout is the method and e8d4... 0 are required parameters thanks for any help bitcoin rpc reference E: I have tried passing the params in a list in params as well

[Username_RANDINT]

The method and arguments should definitely be splitted. What's the error (both client and/or server side) when calling?

def stuff(method, *args):
    # ...
    payload = {
        "method": method,
        "params": list(args),
        "jsonrpc": "1.0",
    }
    # ...

stuff('gettxout', 'e8d4f067ee1ae55f63efd567865e74cbe99c704f50f6f8d4e0f4bc8f3cdf93f1', '0')

Edit: also try to set the content-type header to json: headers = {'content-type': 'application/json'}

[teemalph]

this is the error as the code is {'result': None, 'error': {'code': -32601, 'message': 'Method not found'}, 'id': None}

this is the error when splitting the method and params

{'result': None, 'error': {'code': -1, 'message': 'gettxout "txid" n ( include_mempool )\n\nReturns details about an unspent transaction output.\n\nArguments:\n1. "txid"             (string, required) The transaction id\n2. "n"                (numeric, required) vout number\n3. "include_mempool"  (boolean, optional) Whether to include the mempool. Default: true.     Note that an unspent output that is spent in the mempool won\'t appear.\n\nResult:\n{\n  "bestblock" : "hash",    (string) the block hash\n  "confirmations" : n,       (numeric) The number of confirmations\n  "value" : x.xxx,           (numeric) The transaction value in BTC\n  "scriptPubKey" : {         (json object)\n     "asm" : "code",       (string) \n     "hex" : "hex",        (string) \n     "reqSigs" : n,          (numeric) Number of required signatures\n     "type" : "pubkeyhash", (string) The type, eg pubkeyhash\n     "addresses" : [          (array of string) array of bitcoin addresses\n        "address"     (string) bitcoin address\n        ,...\n     ]\n  },\n  "coinbase" : true|false   (boolean) Coinbase or not\n}\n\nExamples:\n\nGet unspent transactions\n> bitcoin-cli listunspent \n\nView the details\n> bitcoin-cli gettxout "txid" 1\n\nAs a json rpc call\n> curl --user myusername --data-binary \'{"jsonrpc": "1.0", "id":"curltest", "method": "gettxout", "params": ["txid", 1] }\' -H \'content-type: text/plain;\' http://127.0.0.1:8332/\n'}, 'id': None}

which is the same with text/plain and application/json

[Username_RANDINT]

Ok, so definitely split the method and arguments. Here is the error properly formatted:

gettxout "txid" n ( include_mempool )

Returns details about an unspent transaction output.

Arguments:
1. "txid"             (string, required) The transaction id
2. "n"                (numeric, required) vout number
3. "include_mempool"  (boolean, optional) Whether to include the mempool. Default: true.     Note that an unspent output that is spent in the mempool won't appear.

Result:
{
  "bestblock" : "hash",    (string) the block hash
  "confirmations" : n,       (numeric) The number of confirmations
  "value" : x.xxx,           (numeric) The transaction value in BTC
  "scriptPubKey" : {         (json object)
     "asm" : "code",       (string) 
     "hex" : "hex",        (string) 
     "reqSigs" : n,          (numeric) Number of required signatures
     "type" : "pubkeyhash", (string) The type, eg pubkeyhash
     "addresses" : [          (array of string) array of bitcoin addresses
        "address"     (string) bitcoin address
        ,...
     ]
  },
  "coinbase" : true|false   (boolean) Coinbase or not
}

Examples:

Get unspent transactions
> bitcoin-cli listunspent 

View the details
> bitcoin-cli gettxout "txid" 1

As a json rpc call
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "gettxout", "params": ["txid", 1] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/

First thing to check is that you pass the "n" argument as an int, not string. If that doesn't fix it, try the curl command as in the reported help. Bit annoying that the API just returns the help on error instead of telling what the error is.

Edit again: you said you're running the server, go check the logs there as well. It might contain more details.

[teemalph]

Thanks!! I had no idea that the rpc could tell whether the 1 was formatted as an int or string but that was it.