def fetch_capital_base(attempt_index=0):
"""
Fetch the base currency amount required to bootstrap
the algorithm against the exchange.
The algorithm cannot continue without this value.
:param attempt_index:
:return capital_base: the amount of base currency available for
trading
"""
try:
log.debug('retrieving capital base in {} to bootstrap '
'exchange {}'.format(base_currency, exchange_name))
balances = exchange.get_balances()
except ExchangeRequestError as e:
if attempt_index < 20:
sleep(5)
return fetch_capital_base(attempt_index + 1)
else:
raise ExchangeRequestErrorTooManyAttempts(
attempts=attempt_index, error=e)
if base_currency in balances:
return balances[base_currency]
else:
raise BaseCurrencyNotFoundError(base_currency=base_currency,
exchange=exchange_name)
def fetch_capital_base(exchange, attempt_index=0):
"""
Fetch the base currency amount required to bootstrap
the algorithm against the exchange.
The algorithm cannot continue without this value.
:param exchange: the targeted exchange
:param attempt_index:
:return capital_base: the amount of base currency available for
trading
"""
try:
log.debug('retrieving capital base in {} to bootstrap '
'exchange {}'.format(base_currency, exchange_name))
balances = exchange.get_balances()
except ExchangeRequestError as e:
if attempt_index < 20:
log.warn(
'could not retrieve balances on {}: {}'.format(
exchange.name, e
)
)
sleep(5)
return fetch_capital_base(exchange, attempt_index + 1)
else:
raise ExchangeRequestErrorTooManyAttempts(
attempts=attempt_index,
error=e
)
if base_currency in balances:
base_currency_available = balances[base_currency]
log.info(
'base currency available in the account: {} {}'.format(
base_currency_available, base_currency
)
)
if capital_base is not None \
and capital_base < base_currency_available:
log.info(
'using capital base limit: {} {}'.format(
capital_base, base_currency
)
)
amount = capital_base
else:
amount = base_currency_available
return amount
else:
raise BaseCurrencyNotFoundError(
base_currency=base_currency,
exchange=exchange_name
)