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Merge pull request #2256 from freqtrade/kraken_balance

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fix Kraken balance calculation
This commit is contained in:
hroff-1902 2019-09-12 23:12:55 +03:00 committed by GitHub
commit c5f455d660
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4 changed files with 118 additions and 4 deletions
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3
freqtrade/exchange/exchange.py
View File

@ -30,9 +30,6 @@ BAD_EXCHANGES = {
"bitmex": "Various reasons",
"bitstamp": "Does not provide history. "
"Details in https://github.com/freqtrade/freqtrade/issues/1983",
"kraken": "TEMPORARY: Balance does not report free balance, so freqtrade will not know "
"if enough balance is available."
"Details in https://github.com/freqtrade/freqtrade/issues/1687#issuecomment-528509266"
}

34
freqtrade/exchange/kraken.py
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@ -2,7 +2,11 @@
import logging
from typing import Dict
import ccxt
from freqtrade import OperationalException, TemporaryError
from freqtrade.exchange import Exchange
from freqtrade.exchange.exchange import retrier
logger = logging.getLogger(__name__)
@ -10,3 +14,33 @@ logger = logging.getLogger(__name__)
class Kraken(Exchange):
_params: Dict = {"trading_agreement": "agree"}
@retrier
def get_balances(self) -> dict:
if self._config['dry_run']:
return {}
try:
balances = self._api.fetch_balance()
# Remove additional info from ccxt results
balances.pop("info", None)
balances.pop("free", None)
balances.pop("total", None)
balances.pop("used", None)
orders = self._api.fetch_open_orders()
order_list = [(x["symbol"].split("/")[0 if x["side"] == "sell" else 1],
x["remaining"],
# Don't remove the below comment, this can be important for debuggung
# x["side"], x["amount"],
) for x in orders]
for bal in balances:
balances[bal]['used'] = sum(order[1] for order in order_list if order[0] == bal)
balances[bal]['free'] = balances[bal]['total'] - balances[bal]['used']
return balances
except (ccxt.NetworkError, ccxt.ExchangeError) as e:
raise TemporaryError(
f'Could not get balance due to {e.__class__.__name__}. Message: {e}') from e
except ccxt.BaseError as e:
raise OperationalException(e) from e

3
tests/exchange/test_exchange.py
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@ -867,7 +867,7 @@ def test_get_balance_dry_run(default_conf, mocker):
@pytest.mark.parametrize("exchange_name", EXCHANGES)
def test_get_balance_prod(default_conf, mocker, exchange_name):
api_mock = MagicMock()
api_mock.fetch_balance = MagicMock(return_value={'BTC': {'free': 123.4}})
api_mock.fetch_balance = MagicMock(return_value={'BTC': {'free': 123.4, 'total': 123.4}})
default_conf['dry_run'] = False
exchange = get_patched_exchange(mocker, default_conf, api_mock, id=exchange_name)
@ -883,6 +883,7 @@ def test_get_balance_prod(default_conf, mocker, exchange_name):
with pytest.raises(TemporaryError, match=r'.*balance due to malformed exchange response:.*'):
exchange = get_patched_exchange(mocker, default_conf, api_mock, id=exchange_name)
mocker.patch('freqtrade.exchange.Exchange.get_balances', MagicMock(return_value={}))
mocker.patch('freqtrade.exchange.Kraken.get_balances', MagicMock(return_value={}))
exchange.get_balance(currency='BTC')

82
tests/exchange/test_kraken.py
View File

@ -4,6 +4,7 @@ from random import randint
from unittest.mock import MagicMock
from tests.conftest import get_patched_exchange
from tests.exchange.test_exchange import ccxt_exceptionhandlers
def test_buy_kraken_trading_agreement(default_conf, mocker):
@ -67,3 +68,84 @@ def test_sell_kraken_trading_agreement(default_conf, mocker):
assert api_mock.create_order.call_args[0][3] == 1
assert api_mock.create_order.call_args[0][4] is None
assert api_mock.create_order.call_args[0][5] == {'trading_agreement': 'agree'}
def test_get_balances_prod(default_conf, mocker):
balance_item = {
'free': None,
'total': 10.0,
'used': 0.0
}
api_mock = MagicMock()
api_mock.fetch_balance = MagicMock(return_value={
'1ST': balance_item.copy(),
'2ST': balance_item.copy(),
'3ST': balance_item.copy(),
'4ST': balance_item.copy(),
})
kraken_open_orders = [{'symbol': '1ST/EUR',
'type': 'limit',
'side': 'sell',
'price': 20,
'cost': 0.0,
'amount': 1.0,
'filled': 0.0,
'average': 0.0,
'remaining': 1.0,
},
{'status': 'open',
'symbol': '2ST/EUR',
'type': 'limit',
'side': 'sell',
'price': 20.0,
'cost': 0.0,
'amount': 2.0,
'filled': 0.0,
'average': 0.0,
'remaining': 2.0,
},
{'status': 'open',
'symbol': '2ST/USD',
'type': 'limit',
'side': 'sell',
'price': 20.0,
'cost': 0.0,
'amount': 2.0,
'filled': 0.0,
'average': 0.0,
'remaining': 2.0,
},
{'status': 'open',
'symbol': 'BTC/3ST',
'type': 'limit',
'side': 'buy',
'price': 20,
'cost': 0.0,
'amount': 3.0,
'filled': 0.0,
'average': 0.0,
'remaining': 3.0,
}]
api_mock.fetch_open_orders = MagicMock(return_value=kraken_open_orders)
default_conf['dry_run'] = False
exchange = get_patched_exchange(mocker, default_conf, api_mock, id="kraken")
balances = exchange.get_balances()
assert len(balances) == 4
assert balances['1ST']['free'] == 9.0
assert balances['1ST']['total'] == 10.0
assert balances['1ST']['used'] == 1.0
assert balances['2ST']['free'] == 6.0
assert balances['2ST']['total'] == 10.0
assert balances['2ST']['used'] == 4.0
assert balances['3ST']['free'] == 7.0
assert balances['3ST']['total'] == 10.0
assert balances['3ST']['used'] == 3.0
assert balances['4ST']['free'] == 10.0
assert balances['4ST']['total'] == 10.0
assert balances['4ST']['used'] == 0.0
ccxt_exceptionhandlers(mocker, default_conf, api_mock, "kraken",
"get_balances", "fetch_balance")