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60 lines
2.0 KiB
60 lines
2.0 KiB
# SPDX-License-Identifier: BSD-3-Clause
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# Copyright (c) 2020, The Monero Project.
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# Copyright (c) 2020, dsc@xmr.pm
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from typing import List, Union
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import settings
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from wowlet_backend.utils import httpget
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from wowlet_backend.tasks import FeatherTask
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class CryptoRatesTask(FeatherTask):
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def __init__(self, interval: int = 180):
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super(CryptoRatesTask, self).__init__(interval)
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self._cache_key = "crypto_rates"
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self._cache_expiry = self.interval * 10
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self._websocket_cmd = "crypto_rates"
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self._http_api_gecko = "https://api.coingecko.com/api/v3"
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async def task(self) -> Union[List[dict], None]:
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"""Fetch USD prices for various coins"""
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from wowlet_backend.factory import app
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url = f"{self._http_api_gecko}/coins/markets?vs_currency=usd"
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rates = await httpget(url, json=True)
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# normalize object, too many useless keys
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rates = [{
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"id": r["id"],
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"symbol": r["symbol"],
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"image": r["image"],
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"name": r["name"],
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"current_price": r["current_price"],
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"price_change_percentage_24h": r["price_change_percentage_24h"]
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} for r in rates]
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# additional coins as defined by `settings.CRYPTO_RATES_COINS_EXTRA`
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for coin, symbol in settings.CRYPTO_RATES_COINS_EXTRA.items():
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url = f"{self._http_api_gecko}/simple/price?ids={coin}&vs_currencies=usd"
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try:
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data = await httpget(url, json=True)
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if coin not in data or "usd" not in data[coin]:
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continue
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rates.append({
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"id": coin,
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"symbol": symbol,
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"image": "",
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"name": coin.capitalize(),
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"current_price": data[coin]["usd"],
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"price_change_percentage_24h": 0.0
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})
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except Exception as ex:
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app.logger.error(f"extra coin: {coin}; {ex}")
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return rates
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