@authentication_required
def withdraw(self, amount, fee, address):
    path = 'user/requestWithdrawal'
    postdict = {'amount': amount, 'fee': fee, 'currency': 'XBt', 'address': address}
    return self._curl_bitmex(path=path, postdict=postdict, verb='POST', max_retries=0)
@authentication_required
def withdraw(self, amount, fee, address):
    path = 'user/requestWithdrawal'
    postdict = {'amount': amount, 'fee': fee, 'currency': 'XBt', 'address': address}
    return self._curl_bitmex(path=path, postdict=postdict, verb='POST', max_retries=0)