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Added get_funding_fees method to exchange

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This commit is contained in:
Sam Germain 2021-09-01 20:34:01 -06:00
parent d6d5bae2a1
commit 92e630eb69
2 changed files with 86 additions and 5 deletions
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23
freqtrade/exchange/exchange.py
View File

@ -9,7 +9,7 @@ import logging
from copy import deepcopy
from datetime import datetime, timezone
from math import ceil
from typing import Any, Dict, List, Optional, Tuple
from typing import Any, Dict, List, Optional, Tuple, Union
import arrow
import ccxt
@ -1516,15 +1516,28 @@ class Exchange:
self._async_get_trade_history(pair=pair, since=since,
until=until, from_id=from_id))
def get_funding_fees(self, pair: str, since: datetime):
@retrier
def get_funding_fees(self, pair: str, since: Union[datetime, int]) -> float:
"""
Returns the sum of all funding fees that were exchanged for a pair within a timeframe
:param pair: (e.g. ADA/USDT)
:param since: The earliest time of consideration for calculating funding fees,
in unix time or as a datetime
"""
if not self.exchange_has("fetchFundingHistory"):
raise OperationalException(
f"fetch_funding_history() has not been implemented on ccxt.{self.name}")
if type(since) is datetime:
since = int(since.strftime('%s'))
try:
funding_history = self._api.fetch_funding_history(
pair=pair,
since=since
)
# TODO: sum all the funding fees in funding_history together
funding_fees = funding_history
return funding_fees
return sum(fee['amount'] for fee in funding_history)
except ccxt.DDoSProtection as e:
raise DDosProtection(e) from e
except (ccxt.NetworkError, ccxt.ExchangeError) as e:

68
tests/exchange/test_exchange.py
View File

@ -2926,3 +2926,71 @@ def test_calculate_fee_rate(mocker, default_conf, order, expected) -> None:
])
def test_calculate_backoff(retrycount, max_retries, expected):
assert calculate_backoff(retrycount, max_retries) == expected
@pytest.mark.parametrize("exchange_name", ['binance', 'ftx'])
def test_get_funding_fees(default_conf, mocker, exchange_name):
api_mock = MagicMock()
api_mock.fetch_funding_history = MagicMock(return_value=[
{
'amount': 0.14542341,
'code': 'USDT',
'datetime': '2021-09-01T08:00:01.000Z',
'id': '485478',
'info': {'asset': 'USDT',
'income': '0.14542341',
'incomeType': 'FUNDING_FEE',
'info': 'FUNDING_FEE',
'symbol': 'XRPUSDT',
'time': '1630512001000',
'tradeId': '',
'tranId': '4854789484855218760'},
'symbol': 'XRP/USDT',
'timestamp': 1630512001000
},
{
'amount': -0.14642341,
'code': 'USDT',
'datetime': '2021-09-01T16:00:01.000Z',
'id': '485479',
'info': {'asset': 'USDT',
'income': '-0.14642341',
'incomeType': 'FUNDING_FEE',
'info': 'FUNDING_FEE',
'symbol': 'XRPUSDT',
'time': '1630512001000',
'tradeId': '',
'tranId': '4854789484855218760'},
'symbol': 'XRP/USDT',
'timestamp': 1630512001000
}
])
type(api_mock).has = PropertyMock(return_value={'fetchFundingHistory': True})
# mocker.patch('freqtrade.exchange.Exchange.get_funding_fees', lambda pair, since: y)
exchange = get_patched_exchange(mocker, default_conf, api_mock, id=exchange_name)
date_time = datetime.strptime("2021-09-01T00:00:01.000Z", '%Y-%m-%dT%H:%M:%S.%fZ')
unix_time = int(date_time.strftime('%s'))
expected_fees = -0.001 # 0.14542341 + -0.14642341
fees_from_datetime = exchange.get_funding_fees(
pair='XRP/USDT',
since=date_time
)
fees_from_unix_time = exchange.get_funding_fees(
pair='XRP/USDT',
since=unix_time
)
assert(isclose(expected_fees, fees_from_datetime))
assert(isclose(expected_fees, fees_from_unix_time))
ccxt_exceptionhandlers(
mocker,
default_conf,
api_mock,
exchange_name,
"get_funding_fees",
"fetch_funding_history",
pair="XRP/USDT",
since=unix_time
)