Reputation: 453
I have a lot of experience coding, but Python is new territory for me.
I'm using the CoinbaseExchangeAuth class to access the private endpoints of the GDAX API. I write some simple code...
api_url = 'https://public.sandbox.gdax.com/'
auth = CoinbaseExchangeAuth(API_KEY, API_SECRET, API_PASS)
(note that I have accurately defined the api key, secret and pass correctly before these lines of code - for the sandbox)
Then I write:
r = requests.get(api_url + 'accounts', auth=auth)
Run the code and get this error:
File "a:\PythonCryptoBot\Bot1.0\CoinbaseExhangeAuth.py", line 16, in call signature = hmac.new(hmackey, message, hashlib.sha256) File "C:\Users\Dylan\AppData\Local\Programs\Python\Python35-32\lib\hmac.py", line 144, in new return HMAC(key, msg, digestmod) File "C:\Users\Dylan\AppData\Local\Programs\Python\Python35-32\lib\hmac.py", line 84, in __init_ self.update(msg) File "C:\Users\Dylan\AppData\Local\Programs\Python\Python35-32\lib\hmac.py", line 93, in update self.inner.update(msg) TypeError: Unicode-objects must be encoded before hashing
Also note that I have tried to API_KEY.encode('utf-8') and same with others. - doesn't seem to do anything.
Upvotes: 7
Views: 2665
Reputation: 51
The modified code you posted didn't quite work for me, but this did!
import hmac, hashlib, time, requests, os
from requests.auth import AuthBase
API_KEY = os.environ.get('API_KEY')
API_SECRET = os.environ.get('API_SECRET')
# Create custom authentication for Coinbase API
class CoinbaseWalletAuth(AuthBase):
def __init__(self, api_key, secret_key):
self.api_key = api_key
self.secret_key = secret_key
def __call__(self, request):
timestamp = str(int(time.time()))
message = timestamp + request.method + request.path_url + (request.body or b'').decode()
signature = hmac.new(bytes(self.secret_key,'utf-8'), message.encode('utf-8'), hashlib.sha256).hexdigest()
request.headers.update({
'CB-ACCESS-SIGN': signature,
'CB-ACCESS-TIMESTAMP': timestamp,
'CB-ACCESS-KEY': self.api_key,
'CB-VERSION': '2019-11-15'
})
return request
api_url = 'https://api.coinbase.com/v2/'
auth = CoinbaseWalletAuth(API_KEY, API_SECRET)
# Get current user
r = requests.get(api_url + 'accounts', auth=auth)
print(r.json())
Upvotes: 1
Reputation: 15376
The code you're using is written for Python2, you can't expect it to run as it is. I've modified some parts to make it Python3 compatible.
Original code:
import json, hmac, hashlib, time, requests, base64
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 '')
hmac_key = base64.b64decode(self.secret_key)
signature = hmac.new(hmac_key, message, hashlib.sha256)
signature_b64 = signature.digest().encode('base64').rstrip('\n')
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
api_url = 'https://api.gdax.com/'
auth = CoinbaseExchangeAuth(API_KEY, API_SECRET, API_PASS)
# Get accounts
r = requests.get(api_url + 'accounts', auth=auth)
print r.json()
# [{"id": "a1b2c3d4", "balance":...
# Place an order
order = {
'size': 1.0,
'price': 1.0,
'side': 'buy',
'product_id': 'BTC-USD',
}
r = requests.post(api_url + 'orders', json=order, auth=auth)
print r.json()
Modified code:
import json, hmac, hashlib, time, requests, base64
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
api_url = 'https://api.gdax.com/'
auth = CoinbaseExchangeAuth(APIKEY, API_SECRET, API_PASS)
# Get accounts
r = requests.get(api_url + 'accounts', auth=auth)
print(r.json())
# [{"id": "a1b2c3d4", "balance":...
# Place an order
order = {
'size': 1.0,
'price': 1.0,
'side': 'buy',
'product_id': 'BTC-USD',
}
r = requests.post(api_url + 'orders', json=order, auth=auth)
print(r.json())
Note that i've only "translated" the original code, i can't guarantee for it's functionality or security.
Upvotes: 20