Jul 13 - Optimize code

app/services/billing.py

@@ -9,6 +9,7 @@ Key rules:
 - stripe_enabled() guard lets the app run with no keys in dev.
 """
 from datetime import datetime, timedelta
+from app.utils.time import utcnow
 import stripe
 from flask import current_app
 from app.extensions import db
@@ -140,7 +141,7 @@ def activate_boost(user_id: int, listing_id: int, boost_type: str,
     db.session.add(txn)
     db.session.flush()
 
-    expires_at = datetime.utcnow() + timedelta(days=info["days"])
+    expires_at = utcnow() + timedelta(days=info["days"])
     boost = Boost(listing_id=listing_id, user_id=user_id,
                   type=boost_type, expires_at=expires_at,
                   transaction_id=txn.id)
@@ -152,7 +153,7 @@ def activate_boost(user_id: int, listing_id: int, boost_type: str,
         if boost_type == "featured":
             listing.is_featured = True
         if boost_type == "bump":
-            listing.bump_at = datetime.utcnow()
+            listing.bump_at = utcnow()
 
     db.session.commit()
     return boost
@@ -307,7 +308,7 @@ def _record_sub_transaction(user_id, session):
 
 def expire_boosts() -> int:
     """Clear expired boosts and revert listing effects. Returns count."""
-    now = datetime.utcnow()
+    now = utcnow()
     expired = Boost.query.filter(Boost.expires_at <= now).all()
     n = 0
     for boost in expired: