Create app/price_fetcher.py

app/price_fetcher.py

@@ -0,0 +1,27 @@
+"""
+Background price cache using public CoinGecko
+(If you have Gemini keys, swap endpoints & add auth)
+"""
+import httpx, logging, os
+
+COINGECKO_URL = (
+    "https://api.coingecko.com/api/v3/simple/price"
+    "?ids=bitcoin,ethereum,dogecoin&vs_currencies=usd"
+)
+
+CURRENT_PRICES = {"bitcoin": "‑‑", "ethereum": "‑‑", "dogecoin": "‑‑"}
+
+def fetch_prices() -> None:
+    global CURRENT_PRICES
+    try:
+        resp = httpx.get(COINGECKO_URL, timeout=5)
+        resp.raise_for_status()
+        data = resp.json()
+        CURRENT_PRICES = {
+            "bitcoin": data["bitcoin"]["usd"],
+            "ethereum": data["ethereum"]["usd"],
+            "dogecoin": data["dogecoin"]["usd"],
+        }
+        logging.info("⛓  prices updated")
+    except Exception as e:
+        logging.warning(f"Price fetch failed: {e}")