Based on the Coinbase Pro API Documentation I got their authentication class working and have generally been able to make GET calls. However, I'm trying to write a second class that would authenticate and then make the API calls based on the URL changes (i.e., GET 24hr stats for a product ID).
When I run the code below, I'm receiving a TypeError missing the positional argument for product_id even though it's defined in the code. What would I have to change in the main code or for the CoinbaseManager to get the call to work correctly?
import json, hmac, hashlib, time, requests, base64, os from requests.auth import AuthBase # Create custom authentication for Exchange class CoinbaseExchangeAuth(AuthBase): def __init__(self, api_key, secret_key, passphrase): self.api_key = api_key self.secret_key = secret_key self.passphrase = passphrase def __call__(self, request): timestamp = str(time.time()) message = timestamp + request.method + request.path_url + (request.body or b'').decode() hmac_key = base64.b64decode(self.secret_key) signature = hmac.new(hmac_key, message.encode(), hashlib.sha256) signature_b64 = base64.b64encode(signature.digest()).decode() request.headers.update({ 'CB-ACCESS-SIGN': signature_b64, 'CB-ACCESS-TIMESTAMP': timestamp, 'CB-ACCESS-KEY': self.api_key, 'CB-ACCESS-PASSPHRASE': self.passphrase, 'Content-Type': 'application/json' }) return request class CoinbaseManager: _apiUrl = 'https://api.pro.coinbase.com/' _auth = CoinbaseExchangeAuth(os.getenv('apiKey'), os.getenv('secretKey'), os.getenv('passphrase')) def __init__(self): self.data = [] def get_24hr_stats(self, auth, product_id): ''' get_24hr_stats() -- Get 24 hr stats for the product. volume is in base currency units. open, high, low are in quote currency units. ''' extension = 'products/{}/stats'.format(product_id) return requests.get(self._apiUrl + extension, auth=self._auth) if __name__ == '__main__': crypto_id = 'BTC-USD' price = CoinbaseManager.get_24hr_stats(CoinbaseManager._auth, crypto_id) print(price.json()) 
