nettrader.py

import decimal
import hashlib
import hmac
import json
import time
import urllib

import requests


class Api:
    _api_url = 'https://tradernet.ru/api'
    _api_key = None
    _api_secret = None

    def __init__(self, api_key, api_secret):
        self._api_key = api_key
        self._api_secret = api_secret

    def _signature(self, d):
        params = []
        for key in sorted(d):
            params.append((key, d[key]))
        params = urllib.parse.urlencode(params)

        H = hmac.new(self._api_secret.encode(), params.encode(), digestmod=hashlib.sha256)
        return H.hexdigest()

    def call_v1(self, method, params):
        q = {'cmd': method, 'params': params}

        r = requests.post(self._api_url, data={'q': json.dumps(q)})
        return json.loads(r.content.decode(), parse_float=decimal.Decimal)

    def call_v2(self, method, params):
        params['cmd'] = method
        params['apiKey'] = self._api_key
        params['nonce'] = int(time.time() * 10000)

        headers = {'X-NtApi-Sig': self._signature(params),
                   'Content-Type': 'application/x-www-form-urlencoded'}
        url = '{}/v2/cmd/{}'.format(self._api_url, method)

        r = requests.post(url, headers=headers, data=params)
        return json.loads(r.content.decode(), parse_float=decimal.Decimal)