I have this error when requesting quicenode: "{'error': {'code': -32602, 'message': 'non-array args'}, 'id': 0, 'jsonrpc': '2.0'}"

Question

The following code is related to Ethereum network logs, which I am trying to extract with qouick node api. My code was working until a few days ago, but today when I visited it, I encountered this error:

{'error': {'code': -32602, 'message': 'non-array args'},
 'id': 0,
 'jsonrpc': '2.0'}

my code:

def get_logs(block_hash):
    logs_block = w3.eth.get_logs({'blockHash': block_hash})
    for log in logs_block:
        trx = w3.eth.get_transaction_receipt(log['transactionHash'])
        result = client.make_request("trace_transaction", trx['transactionHash'].hex())
        print(result)
get_logs('0xeadccd8a2436ab5d50736ae2f93998aa007d3115089c14733b9a5764f6c7caaf')
# number block = 20504126

My code shows the trx variable correctly and does not cause any problems, but when it reaches the result, it becomes a problem and an error occurs.

How can I fix this error?

Answer 1

I don't know this tracing API, but I see that the Nethermind API for trace_transaction has this specification:

Request

curl localhost:8545 \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{
      "jsonrpc": "2.0",
      "id": 0,
      "method": "trace_transaction",
      "params": [txHash]
   }'

...where the params property is expected to be an array with one transaction hash. Also the error object you quoted mentions "non-array args". So I would expect that you need to pass an array here:

result = client.make_request("trace_transaction",
                             [trx['transactionHash'].hex()])

Note the wrapping square brackets.