Refine time conversions

nautilus_trader/config/backtest.py

@@ -30,7 +30,7 @@
 from nautilus_trader.config.common import NautilusConfig
 from nautilus_trader.config.common import NautilusKernelConfig
 from nautilus_trader.config.common import RiskEngineConfig
-from nautilus_trader.core.datetime import maybe_dt_to_unix_nanos
+from nautilus_trader.core.datetime import dt_to_unix_nanos
 from nautilus_trader.model.data import Bar
 from nautilus_trader.model.identifiers import ClientId
 from nautilus_trader.persistence.catalog.parquet import ParquetDataCatalog
@@ -110,13 +110,13 @@ def query(self) -> dict[str, Any]:
     def start_time_nanos(self) -> int:
         if self.start_time is None:
             return 0
-        return maybe_dt_to_unix_nanos(pd.Timestamp(self.start_time))
+        return dt_to_unix_nanos(self.start_time)
 
     @property
     def end_time_nanos(self) -> int:
         if self.end_time is None:
             return sys.maxsize
-        return maybe_dt_to_unix_nanos(pd.Timestamp(self.end_time))
+        return dt_to_unix_nanos(self.end_time)
 
     def catalog(self) -> ParquetDataCatalog:
         from nautilus_trader.persistence.catalog.parquet import ParquetDataCatalog