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Reduce exchange rate refresh to twice daily

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Be respectful of the free Frankfurter API — ECB rates only update once
a day anyway, so a 12-hour cache TTL is more than sufficient.

https://claude.ai/code/session_01LPpSZFfyh6vdV5HGFWjoQX
This commit is contained in:
Claude
2026-02-28 00:56:21 +00:00
parent 8277cf37e2
commit 6fdbc9f9a0
2 changed files with 3 additions and 3 deletions
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2
README.md
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@@ -49,4 +49,4 @@ All configuration is via environment variables (see `.env.example`):
- **Deduplication**: deals are tracked by game ID + timestamp; duplicates are never reposted - **Deduplication**: deals are tracked by game ID + timestamp; duplicates are never reposted
- **Pruning**: deals older than 30 days are pruned from the database so they can be reposted if they return - **Pruning**: deals older than 30 days are pruned from the database so they can be reposted if they return
- **One message per deal**: each deal is posted individually so messages are independently linkable and dismissible - **One message per deal**: each deal is posted individually so messages are independently linkable and dismissible
- **Multi-currency pricing**: deal prices are shown in USD, CAD, EUR, and GBP using live exchange rates from the [Frankfurter API](https://api.frankfurter.dev) (ECB data, no API key required). Rates are cached and refreshed hourly. - **Multi-currency pricing**: deal prices are shown in USD, CAD, EUR, and GBP using live exchange rates from the [Frankfurter API](https://api.frankfurter.dev) (ECB data, no API key required). Rates are cached and refreshed twice daily.

4
gaming_deals_bot/currency.py
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@@ -1,6 +1,6 @@
"""Currency conversion using the Frankfurter API (ECB rates, no API key required). """Currency conversion using the Frankfurter API (ECB rates, no API key required).
Rates are cached in memory and refreshed at most once per hour. Rates are cached in memory and refreshed at most twice per day.
""" """
import logging import logging
@@ -12,7 +12,7 @@ logger = logging.getLogger(__name__)
FRANKFURTER_URL = "https://api.frankfurter.dev/v1/latest" FRANKFURTER_URL = "https://api.frankfurter.dev/v1/latest"
TARGET_CURRENCIES = ("CAD", "EUR", "GBP") TARGET_CURRENCIES = ("CAD", "EUR", "GBP")
CACHE_TTL_SECONDS = 3600 # 1 hour CACHE_TTL_SECONDS = 43200 # 12 hours — be nice to the free service
# Module-level cache # Module-level cache
_rates: dict[str, float] = {} _rates: dict[str, float] = {}