Bitmex fetch_balance Signature not valid

[jl2035]

Similar issue here: #4279
...so this might be a duplicate but the fix they did does not affect me.

Output of ccxt.version:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-5-91cb1fe60dcf> in <module>
----> 1 ccxt.version

AttributeError: module 'ccxt' has no attribute 'version'

• OS: Ubuntu 20.04.4
• Programming Language version: Python 3.7.3, ipython 7.28.0
• CCXT version: 1.56.63 (taken from lib/python3.7/site-packages/ccxt/init.py)

exchange = exchange_class({
    'apiKey': self.api_key,
    'secret': self.api_secret,
    'timeout': 30000,
    'enableRateLimit': True,
    'urls': {
        'api': {
            'public': exhange_api_url,
            'private': exhange_api_url, 
        },
    },
    'options': {
        'fetchOHLCVOpenTimestamp': False,
    },
})


symbol='BTC/USD'
btc_price_symbol='.BXBT'
last_price_response = exchange.public_get_instrument({'symbol': btc_price_symbol,'columns':'lastPrice'})
last_price = float(last_price_response[0]['lastPrice'])
current_btc_price = last_price
time.sleep(1)
keys = exchange.privateGetApiKey()
time.sleep(1)
balance = exchange.fetch_balance()

The code crashes at fetch_balance(). This works on testnet, but not on real exchange. The output is:

bitmex {"error":{"message":"Signature not valid.","name":"HTTPError"}}

I've already asked the bitmex support but they were useless. No help whatsoever.

[carlosmiei]

Hello @jl2035, I've checked and seems to be working fine on my end so I'd suggest double-checking your API keys, which is the most likely reason as it was in #4279.

Also I've noticed you're overriding the public and private API URL

    'urls': {
        'api': {
            'public': exhange_api_url,
            'private': exhange_api_url, 
        },
    },

that can be a reason too so I'd confirm that as well.

Thank you

[jl2035]

Interesting. If I don't override the urls it's all working fine. Thanks.

exchange = exchange_class({
    'apiKey': self.api_key,
    'secret': self.api_secret,
    'timeout': 30000,
    'enableRateLimit': True,
    #'urls': {
    #    'api': {
    #        'public': exhange_api_url,
    #        'private': exhange_api_url, 
    #    },
    #},
    'options': {
        'fetchOHLCVOpenTimestamp': False,
    },
})