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Merge pull request #3239 from freqtrade/feat/fee_handling

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Improve fee handling
This commit is contained in:
hroff-1902
2020-05-14 18:48:48 +03:00
committed by GitHub
parent cc3c141f89 255ff6cd06
commit 8e4ffea52b
11 changed files with 505 additions and 161 deletions
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55
tests/exchange/test_exchange.py
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@@ -2145,3 +2145,58 @@ def test_symbol_is_pair(market_symbol, base_currency, quote_currency, expected_r
])
def test_market_is_active(market, expected_result) -> None:
assert market_is_active(market) == expected_result
@pytest.mark.parametrize("order,expected", [
([{'fee'}], False),
({'fee': None}, False),
({'fee': {'currency': 'ETH/BTC'}}, False),
({'fee': {'currency': 'ETH/BTC', 'cost': None}}, False),
({'fee': {'currency': 'ETH/BTC', 'cost': 0.01}}, True),
])
def test_order_has_fee(order, expected) -> None:
assert Exchange.order_has_fee(order) == expected
@pytest.mark.parametrize("order,expected", [
({'symbol': 'ETH/BTC', 'fee': {'currency': 'ETH', 'cost': 0.43}},
(0.43, 'ETH', 0.01)),
({'symbol': 'ETH/USDT', 'fee': {'currency': 'USDT', 'cost': 0.01}},
(0.01, 'USDT', 0.01)),
({'symbol': 'BTC/USDT', 'fee': {'currency': 'USDT', 'cost': 0.34, 'rate': 0.01}},
(0.34, 'USDT', 0.01)),
])
def test_extract_cost_curr_rate(mocker, default_conf, order, expected) -> None:
mocker.patch('freqtrade.exchange.Exchange.calculate_fee_rate', MagicMock(return_value=0.01))
ex = get_patched_exchange(mocker, default_conf)
assert ex.extract_cost_curr_rate(order) == expected
@pytest.mark.parametrize("order,expected", [
# Using base-currency
({'symbol': 'ETH/BTC', 'amount': 0.04, 'cost': 0.05,
'fee': {'currency': 'ETH', 'cost': 0.004, 'rate': None}}, 0.1),
({'symbol': 'ETH/BTC', 'amount': 0.05, 'cost': 0.05,
'fee': {'currency': 'ETH', 'cost': 0.004, 'rate': None}}, 0.08),
# Using quote currency
({'symbol': 'ETH/BTC', 'amount': 0.04, 'cost': 0.05,
'fee': {'currency': 'BTC', 'cost': 0.005}}, 0.1),
({'symbol': 'ETH/BTC', 'amount': 0.04, 'cost': 0.05,
'fee': {'currency': 'BTC', 'cost': 0.002, 'rate': None}}, 0.04),
# Using foreign currency
({'symbol': 'ETH/BTC', 'amount': 0.04, 'cost': 0.05,
'fee': {'currency': 'NEO', 'cost': 0.0012}}, 0.001944),
({'symbol': 'ETH/BTC', 'amount': 2.21, 'cost': 0.02992561,
'fee': {'currency': 'NEO', 'cost': 0.00027452}}, 0.00074305),
# TODO: More tests here!
# Rate included in return - return as is
({'symbol': 'ETH/BTC', 'amount': 0.04, 'cost': 0.05,
'fee': {'currency': 'USDT', 'cost': 0.34, 'rate': 0.01}}, 0.01),
({'symbol': 'ETH/BTC', 'amount': 0.04, 'cost': 0.05,
'fee': {'currency': 'USDT', 'cost': 0.34, 'rate': 0.005}}, 0.005),
])
def test_calculate_fee_rate(mocker, default_conf, order, expected) -> None:
mocker.patch('freqtrade.exchange.Exchange.fetch_ticker', return_value={'last': 0.081})
ex = get_patched_exchange(mocker, default_conf)
assert ex.calculate_fee_rate(order) == expected