[fix] Fix missing timezone information

lnbits/db.py

@@ -337,7 +337,8 @@ class Database(Compat):
                     f = "%Y-%m-%d %H:%M:%S.%f"
                     if "." not in value:
                         f = "%Y-%m-%d %H:%M:%S"
-                    return datetime.strptime(value, f)
+                    # Parse and add UTC timezone info
+                    return datetime.strptime(value, f).replace(tzinfo=timezone.utc)
 
                 dbapi_connection.run_async(
                     lambda connection: connection.set_type_codec(
@@ -756,7 +757,11 @@ def dict_to_model(_row: dict, model: type[TModel]) -> TModel:  # noqa: C901
             if DB_TYPE == SQLITE:
                 _dict[key] = datetime.fromtimestamp(value, timezone.utc)
             else:
-                _dict[key] = value
+                # Ensure PostgreSQL datetime values have timezone info
+                if isinstance(value, datetime) and value.tzinfo is None:
+                    _dict[key] = value.replace(tzinfo=timezone.utc)
+                else:
+                    _dict[key] = value
             continue
         if issubclass(type_, BaseModel):
             _dict[key] = dict_to_submodel(type_, value)

tests/unit/test_db.py

@@ -1,4 +1,4 @@
-from datetime import date
+from datetime import date, timezone
 
 import pytest
 
@@ -8,6 +8,9 @@ from lnbits.core.crud import (
     get_wallet,
     get_wallet_for_key,
 )
+from lnbits.core.crud.payments import get_payment
+from lnbits.core.models import CreateInvoice
+from lnbits.core.services.payments import create_wallet_invoice
 from lnbits.db import POSTGRES
 
 
@@ -18,6 +21,24 @@ async def test_date_conversion(db):
         assert row and isinstance(row.get("now"), date)
 
 
+@pytest.mark.anyio
+async def test_payment_datetime_fields_have_timezone(app, to_user):
+    """Test that Payment datetime fields always have UTC timezone info."""
+    wallet = await create_wallet(user_id=to_user.id, wallet_name="test_tz_wallet")
+    invoice_data = CreateInvoice(amount=10, memo="timezone_test", out=False)
+    invoice = await create_wallet_invoice(wallet.id, invoice_data)
+
+    payment = await get_payment(invoice.checking_id)
+    assert payment is not None
+
+    # All datetime fields should have UTC timezone info
+    assert payment.time.tzinfo == timezone.utc
+    assert payment.created_at.tzinfo == timezone.utc
+    assert payment.updated_at.tzinfo == timezone.utc
+    if payment.expiry:
+        assert payment.expiry.tzinfo == timezone.utc
+
+
 # make test to create wallet and delete wallet
 @pytest.mark.anyio
 async def test_create_wallet_and_delete_wallet(app, to_user):