python - Huobi API authentication often returning error - Stack Overflow

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I have the following code working properly, but eventually (in fact quite very often) it returns error {'status': 'error', 'err-code': 'api-signature-not-valid', 'err-msg': 'Signature not valid: Verification failure [校验失败]', 'data': None} during the loop operation. I cannot understand the reason why, because it sometimes works and sometimes doesn't for apparently no reason...

Have anybody ever faced this kind of issue before? Could somebody please try to help me? I've tried different approaches to solve the problem, but in the end every approach gave me only errors... This is the only solution I have that appears to eventually work. Thank you all in advance for any tip or help!

from datetime import datetime
import hmac
import hashlib
import base64
from urllib.parse import urlparse
import requests
import time


def generate_timestamp():
    # Gera o timestamp no formato ISO 8601
    timestamp = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S')
    # Substituir os caracteres para codificação de URL
    timestamp = timestamp.replace(":", "%3A").replace(" ", "%20").upper()
    return timestamp


def generate_signature(api_secret, method, url, params):
    # Ordenar os parâmetros em ordem alfabética
    sorted_keys = sorted(params.keys())
    query_string = "&".join([f"{key}={params[key]}" for key in sorted_keys])

    # Montar o texto pré-assinado
    url_parts = urlparse(url)
    host = url_partsloc
    path = url_parts.path
    pre_signed_text = f"{method.upper()}\n{host}\n{path}\n{query_string}"
    print(f"Pre-signed text:\n{pre_signed_text}")

    # Gerar a assinatura usando HMAC-SHA256
    signature = hmac.new(
        api_secret.encode('utf-8'),
        pre_signed_text.encode('utf-8'),
        hashlib.sha256
    ).digest()

    # Retorna a assinatura em Base64
    return base64.b64encode(signature).decode('utf-8')


def fetch_balances(api_key, api_secret):
    spot_account_id = "29996280"
    endpoint = f"/v1/account/accounts/{spot_account_id}/balance"
    base_url = ";
    url = f"{base_url}{endpoint}"

    method = "GET"
    timestamp = generate_timestamp()

    # Parâmetros essenciais
    params = {
        "AccessKeyId": api_key,
        "SignatureMethod": "HmacSHA256",
        "SignatureVersion": "2",
        "Timestamp": timestamp
    }

    # Gerar a assinatura
    signature = generate_signature(api_secret, method, url, params)
    if not signature:
        print("Erro ao gerar a assinatura")
        return []

    # Adicionar a assinatura aos parâmetros
    params["Signature"] = signature
    sorted_keys = sorted(params.keys())
    query_string = "&".join([f"{key}={params[key]}" for key in sorted_keys])

    # Construir a URL final
    final_url = f"{url}?{query_string}"
    print(f"URL Final: {final_url}")

    # Executar a requisição
    headers = {"Content-Type": "application/x-www-form-urlencoded"}
    response = requests.get(final_url, headers=headers)

    if response.status_code == 200:
        print("Requisição bem-sucedida")
        return response.json()
    else:
        print(f"Falha na requisição: {response.status_code}")
        print(f"Resposta JSON: {response.text}")
        return []


def loop_fetch_balances(api_key, api_secret):
    while True:  # Loop infinito
        try:
            # Chama a função fetch_balances
            balances = fetch_balances(api_key, api_secret)

            # Imprime os balances, se disponíveis
            if balances:
                print("Inicio da resposta:", str(balances)[:200])  # Exibe os primeiros 100 caracteres
            else:
                print("Não foi possível obter os balances.")

            # Aguarda 5 segundos antes de repetir
            time.sleep(5)
        except KeyboardInterrupt:
            # Permite sair do loop com Ctrl+C
            print("Encerrando o loop...")
            break


# Configurações da API
api_key = "MY_API_KEY"
api_secret = "MY_API_SECRET"

# Executa o loop
loop_fetch_balances(api_key, api_secret)

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