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Avoid CoinGecko's API rate limit with time delays

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Updating token prices with ./mev prices fetch-all can fail due to CoinGecko's API rate limits https://www.coingecko.com/en/api/pricing_2 (10-30 requests a minute)

Error message:
ValueError: {'status': {'error_code': 429, 'error_message': "You've exceeded the Rate Limit. Please visit https://www.coingecko.com/en/api/pricing to subscribe to our API plans for higher rate limits."}}

Currently, TOKEN_ADDRESSES length is 14 which can (and does) fail the function, depending on the dynamic limit

By introducing time delays between API queries we can avoid hitting the limit and failing the price update.
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romandvo 2023-03-16 14:11:25 +02:00 committed by GitHub
parent 51c7345d26
commit 5cdbf5b2d7
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mev_inspect/prices.py
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@ -1,16 +1,20 @@
from datetime import datetime
from typing import List
import time
from pycoingecko import CoinGeckoAPI
from mev_inspect.schemas.prices import COINGECKO_ID_BY_ADDRESS, TOKEN_ADDRESSES, Price
SLEEP_TIME = 10
def fetch_prices() -> List[Price]:
coingecko_api = CoinGeckoAPI()
prices = []
for token_address in TOKEN_ADDRESSES:
# Avoid Coingecko's API rate limits
time.sleep(SLEEP_TIME)
coingecko_price_data = coingecko_api.get_coin_market_chart_by_id(
id=COINGECKO_ID_BY_ADDRESS[token_address],
vs_currency="usd",