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94 lines
3.6 KiB
94 lines
3.6 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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import json
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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 WowletTask
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from wowlet_backend.factory import cache
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class CryptoRatesTask(WowletTask):
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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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# limit the list, only include specific coins. see wowlet:src/utils/prices.cpp
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whitelist = ["XMR", "ZEC", "BTC", "ETH", "BCH", "LTC", "EOS", "ADA", "XLM", "TRX", "DASH", "DCR", "VET", "DOGE", "XRP", "WOW"]
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rates = [r for r in rates if r["symbol"].upper() in whitelist]
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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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obj = {}
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try:
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results = {}
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for vs_currency in ["usd", "btc"]:
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url = f"{self._http_api_gecko}/simple/price?ids={coin}&vs_currencies={vs_currency}"
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data = await httpget(url, json=True, timeout=15)
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results[vs_currency] = data[coin][vs_currency]
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price_btc = "{:.8f}".format(results["btc"])
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price_sat = int(price_btc.replace(".", "").lstrip("0")) # yolo
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obj = {
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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": results["usd"],
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"current_price_btc": price_btc,
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"current_price_satoshi": price_sat,
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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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# use cache if present
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data = await cache.get(self._cache_key)
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if data:
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data = json.loads(data)
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extra_coin = [e for e in data if e['symbol'] == symbol]
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if extra_coin:
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app.logger.warning(f"using cache for extra coin: {coin}")
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rates.append(extra_coin[0])
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continue
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try:
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# additional call to fetch 24h pct change
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url = f"{self._http_api_gecko}/coins/{coin}?tickers=false&market_data=true&community_data=false&developer_data=false&sparkline=false"
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blob = await httpget(url, json=True, timeout=15)
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obj["price_change_percentage_24h"] = blob.get("market_data", {}).get("price_change_percentage_24h")
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except:
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pass
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rates.append(obj)
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return rates
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