fetch_rates_for_date

Documentation for eth_defi.currency_api.client.fetch_rates_for_date function.

fetch_rates_for_date(session, date, base_currency, quote_currencies, source, timeout=30.0)

Fetch and classify the exchange rate document for a single date.

Tries the jsDelivr host first, falling back to the pages.dev host on a 404 or transient failure. A date is only declared unavailable when both hosts return a definitive 404.

Parameters

• session (requests.sessions.Session) – Shared requests session from create_currency_api_session().

• date (datetime.date) – UTC calendar date to fetch.

• base_currency (str) – Lower-cased base currency code; interpolated into the URL (never hardcoded usd).

• quote_currencies (tuple[str, ...]) – Quote currency codes to extract from the document.

• source (str) – Provider identifier stored on the returned DateRates.

• timeout (float) – Per-request timeout in seconds.

Returns

A FetchResult classifying the outcome.

Return type

eth_defi.currency_api.client.FetchResult