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Exchange coingekko for coinmarketcap

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This commit is contained in:
Matthias
2020-03-07 11:52:26 +01:00
parent 93fc14d726
commit df5adb6ca5
3 changed files with 65 additions and 65 deletions
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52
freqtrade/rpc/fiat_convert.py
View File

@@ -7,7 +7,7 @@ import logging
import time
from typing import Dict, List
from coinmarketcap import Market
from pycoingecko import CoinGeckoAPI
from freqtrade.constants import SUPPORTED_FIAT
@@ -38,8 +38,8 @@ class CryptoFiat:
# Private attributes
self._expiration = 0.0
self.crypto_symbol = crypto_symbol.upper()
self.fiat_symbol = fiat_symbol.upper()
self.crypto_symbol = crypto_symbol.lower()
self.fiat_symbol = fiat_symbol.lower()
self.set_price(price=price)
def set_price(self, price: float) -> None:
@@ -67,17 +67,20 @@ class CryptoToFiatConverter:
This object is also a Singleton
"""
__instance = None
_coinmarketcap: Market = None
_coingekko: CoinGeckoAPI = None
_cryptomap: Dict = {}
def __new__(cls):
"""
This class is a singleton - should not be instanciated twice.
"""
if CryptoToFiatConverter.__instance is None:
CryptoToFiatConverter.__instance = object.__new__(cls)
try:
CryptoToFiatConverter._coinmarketcap = Market()
CryptoToFiatConverter._coingekko = CoinGeckoAPI()
except BaseException:
CryptoToFiatConverter._coinmarketcap = None
CryptoToFiatConverter._coingekko = None
return CryptoToFiatConverter.__instance
def __init__(self) -> None:
@@ -86,14 +89,12 @@ class CryptoToFiatConverter:
def _load_cryptomap(self) -> None:
try:
coinlistings = self._coinmarketcap.listings()
self._cryptomap = dict(map(lambda coin: (coin["symbol"], str(coin["id"])),
coinlistings["data"]))
except (BaseException) as exception:
coinlistings = self._coingekko.get_coins_list()
# Create mapping table from synbol to coingekko_id
self._cryptomap = {x['symbol']: x['id'] for x in coinlistings}
except (Exception) as exception:
logger.error(
"Could not load FIAT Cryptocurrency map for the following problem: %s",
type(exception).__name__
)
f"Could not load FIAT Cryptocurrency map for the following problem: {exception}")
def convert_amount(self, crypto_amount: float, crypto_symbol: str, fiat_symbol: str) -> float:
"""
@@ -115,8 +116,8 @@ class CryptoToFiatConverter:
:param fiat_symbol: FIAT currency you want to convert to (e.g USD)
:return: Price in FIAT
"""
crypto_symbol = crypto_symbol.upper()
fiat_symbol = fiat_symbol.upper()
crypto_symbol = crypto_symbol.lower()
fiat_symbol = fiat_symbol.lower()
# Check if the fiat convertion you want is supported
if not self._is_supported_fiat(fiat=fiat_symbol):
@@ -170,15 +171,13 @@ class CryptoToFiatConverter:
:return: bool, True supported, False not supported
"""
fiat = fiat.upper()
return fiat in SUPPORTED_FIAT
return fiat.upper() in SUPPORTED_FIAT
def _find_price(self, crypto_symbol: str, fiat_symbol: str) -> float:
"""
Call CoinMarketCap API to retrieve the price in the FIAT
:param crypto_symbol: Crypto-currency you want to convert (e.g BTC)
:param fiat_symbol: FIAT currency you want to convert to (e.g USD)
Call CoinGekko API to retrieve the price in the FIAT
:param crypto_symbol: Crypto-currency you want to convert (e.g btc)
:param fiat_symbol: FIAT currency you want to convert to (e.g usd)
:return: float, price of the crypto-currency in Fiat
"""
# Check if the fiat convertion you want is supported
@@ -195,12 +194,13 @@ class CryptoToFiatConverter:
return 0.0
try:
_gekko_id = self._cryptomap[crypto_symbol]
return float(
self._coinmarketcap.ticker(
currency=self._cryptomap[crypto_symbol],
convert=fiat_symbol
)['data']['quotes'][fiat_symbol.upper()]['price']
self._coingekko.get_price(
ids=_gekko_id,
vs_currencies=fiat_symbol
)[_gekko_id][fiat_symbol]
)
except BaseException as exception:
except Exception as exception:
logger.error("Error in _find_price: %s", exception)
return 0.0

24
tests/conftest.py
View File

@@ -167,23 +167,23 @@ def patch_get_signal(freqtrade: FreqtradeBot, value=(True, False)) -> None:
@pytest.fixture(autouse=True)
def patch_coinmarketcap(mocker) -> None:
def patch_coingekko(mocker) -> None:
"""
Mocker to coinmarketcap to speed up tests
:param mocker: mocker to patch coinmarketcap class
Mocker to coingekko to speed up tests
:param mocker: mocker to patch coingekko class
:return: None
"""
tickermock = MagicMock(return_value={'price_usd': 12345.0})
listmock = MagicMock(return_value={'data': [{'id': 1, 'name': 'Bitcoin', 'symbol': 'BTC',
'website_slug': 'bitcoin'},
{'id': 1027, 'name': 'Ethereum', 'symbol': 'ETH',
'website_slug': 'ethereum'}
]})
tickermock = MagicMock(return_value={'bitcoin': {'usd': 12345.0}, 'ethereum': {'usd': 12345.0}})
listmock = MagicMock(return_value=[{'id': 'bitcoin', 'name': 'Bitcoin', 'symbol': 'btc',
'website_slug': 'bitcoin'},
{'id': 'ethereum', 'name': 'Ethereum', 'symbol': 'eth',
'website_slug': 'ethereum'}
])
mocker.patch.multiple(
'freqtrade.rpc.fiat_convert.Market',
ticker=tickermock,
listings=listmock,
'freqtrade.rpc.fiat_convert.CoinGeckoAPI',
get_price=tickermock,
get_coins_list=listmock,
)

54
tests/rpc/test_fiat_convert.py
View File

@@ -8,7 +8,7 @@ import pytest
from requests.exceptions import RequestException
from freqtrade.rpc.fiat_convert import CryptoFiat, CryptoToFiatConverter
from tests.conftest import log_has
from tests.conftest import log_has, log_has_re
def test_pair_convertion_object():
@@ -22,8 +22,8 @@ def test_pair_convertion_object():
assert pair_convertion.CACHE_DURATION == 6 * 60 * 60
# Check a regular usage
assert pair_convertion.crypto_symbol == 'BTC'
assert pair_convertion.fiat_symbol == 'USD'
assert pair_convertion.crypto_symbol == 'btc'
assert pair_convertion.fiat_symbol == 'usd'
assert pair_convertion.price == 12345.0
assert pair_convertion.is_expired() is False
@@ -57,15 +57,15 @@ def test_fiat_convert_add_pair(mocker):
fiat_convert._add_pair(crypto_symbol='btc', fiat_symbol='usd', price=12345.0)
pair_len = len(fiat_convert._pairs)
assert pair_len == 1
assert fiat_convert._pairs[0].crypto_symbol == 'BTC'
assert fiat_convert._pairs[0].fiat_symbol == 'USD'
assert fiat_convert._pairs[0].crypto_symbol == 'btc'
assert fiat_convert._pairs[0].fiat_symbol == 'usd'
assert fiat_convert._pairs[0].price == 12345.0
fiat_convert._add_pair(crypto_symbol='btc', fiat_symbol='Eur', price=13000.2)
pair_len = len(fiat_convert._pairs)
assert pair_len == 2
assert fiat_convert._pairs[1].crypto_symbol == 'BTC'
assert fiat_convert._pairs[1].fiat_symbol == 'EUR'
assert fiat_convert._pairs[1].crypto_symbol == 'btc'
assert fiat_convert._pairs[1].fiat_symbol == 'eur'
assert fiat_convert._pairs[1].price == 13000.2
@@ -100,15 +100,15 @@ def test_fiat_convert_get_price(mocker):
fiat_convert = CryptoToFiatConverter()
with pytest.raises(ValueError, match=r'The fiat US DOLLAR is not supported.'):
fiat_convert.get_price(crypto_symbol='BTC', fiat_symbol='US Dollar')
with pytest.raises(ValueError, match=r'The fiat us dollar is not supported.'):
fiat_convert.get_price(crypto_symbol='btc', fiat_symbol='US Dollar')
# Check the value return by the method
pair_len = len(fiat_convert._pairs)
assert pair_len == 0
assert fiat_convert.get_price(crypto_symbol='BTC', fiat_symbol='USD') == 28000.0
assert fiat_convert._pairs[0].crypto_symbol == 'BTC'
assert fiat_convert._pairs[0].fiat_symbol == 'USD'
assert fiat_convert.get_price(crypto_symbol='btc', fiat_symbol='usd') == 28000.0
assert fiat_convert._pairs[0].crypto_symbol == 'btc'
assert fiat_convert._pairs[0].fiat_symbol == 'usd'
assert fiat_convert._pairs[0].price == 28000.0
assert fiat_convert._pairs[0]._expiration != 0
assert len(fiat_convert._pairs) == 1
@@ -116,13 +116,13 @@ def test_fiat_convert_get_price(mocker):
# Verify the cached is used
fiat_convert._pairs[0].price = 9867.543
expiration = fiat_convert._pairs[0]._expiration
assert fiat_convert.get_price(crypto_symbol='BTC', fiat_symbol='USD') == 9867.543
assert fiat_convert.get_price(crypto_symbol='btc', fiat_symbol='usd') == 9867.543
assert fiat_convert._pairs[0]._expiration == expiration
# Verify the cache expiration
expiration = time.time() - 2 * 60 * 60
fiat_convert._pairs[0]._expiration = expiration
assert fiat_convert.get_price(crypto_symbol='BTC', fiat_symbol='USD') == 28000.0
assert fiat_convert.get_price(crypto_symbol='btc', fiat_symbol='usd') == 28000.0
assert fiat_convert._pairs[0]._expiration is not expiration
@@ -143,15 +143,15 @@ def test_loadcryptomap(mocker):
fiat_convert = CryptoToFiatConverter()
assert len(fiat_convert._cryptomap) == 2
assert fiat_convert._cryptomap["BTC"] == "1"
assert fiat_convert._cryptomap["btc"] == "bitcoin"
def test_fiat_init_network_exception(mocker):
# Because CryptoToFiatConverter is a Singleton we reset the listings
listmock = MagicMock(side_effect=RequestException)
mocker.patch.multiple(
'freqtrade.rpc.fiat_convert.Market',
listings=listmock,
'freqtrade.rpc.fiat_convert.CoinGeckoAPI',
get_coins_list=listmock,
)
# with pytest.raises(RequestEsxception):
fiat_convert = CryptoToFiatConverter()
@@ -163,24 +163,24 @@ def test_fiat_init_network_exception(mocker):
def test_fiat_convert_without_network(mocker):
# Because CryptoToFiatConverter is a Singleton we reset the value of _coinmarketcap
# Because CryptoToFiatConverter is a Singleton we reset the value of _coingekko
fiat_convert = CryptoToFiatConverter()
cmc_temp = CryptoToFiatConverter._coinmarketcap
CryptoToFiatConverter._coinmarketcap = None
cmc_temp = CryptoToFiatConverter._coingekko
CryptoToFiatConverter._coingekko = None
assert fiat_convert._coinmarketcap is None
assert fiat_convert._find_price(crypto_symbol='BTC', fiat_symbol='USD') == 0.0
CryptoToFiatConverter._coinmarketcap = cmc_temp
assert fiat_convert._coingekko is None
assert fiat_convert._find_price(crypto_symbol='btc', fiat_symbol='usd') == 0.0
CryptoToFiatConverter._coingekko = cmc_temp
def test_fiat_invalid_response(mocker, caplog):
# Because CryptoToFiatConverter is a Singleton we reset the listings
listmock = MagicMock(return_value="{'novalidjson':DEADBEEFf}")
mocker.patch.multiple(
'freqtrade.rpc.fiat_convert.Market',
listings=listmock,
'freqtrade.rpc.fiat_convert.CoinGeckoAPI',
get_coins_list=listmock,
)
# with pytest.raises(RequestEsxception):
fiat_convert = CryptoToFiatConverter()
@@ -189,8 +189,8 @@ def test_fiat_invalid_response(mocker, caplog):
length_cryptomap = len(fiat_convert._cryptomap)
assert length_cryptomap == 0
assert log_has('Could not load FIAT Cryptocurrency map for the following problem: TypeError',
caplog)
assert log_has_re('Could not load FIAT Cryptocurrency map for the following problem: .*',
caplog)
def test_convert_amount(mocker):