chore: improve type-safety

freqtrade/ft_types/plot_annotation_type.py

@@ -5,7 +5,7 @@ from typing_extensions import NotRequired, TypedDict
 
 
 class AnnotationType(TypedDict):
-    type: Literal["area"] = "area"
+    type: Literal["area"]
     start: NotRequired[str | datetime]
     end: NotRequired[str | datetime]
     y_start: NotRequired[float]

freqtrade/rpc/rpc.py

@@ -33,6 +33,7 @@ from freqtrade.enums import (
 from freqtrade.exceptions import ExchangeError, PricingError
 from freqtrade.exchange import timeframe_to_minutes, timeframe_to_msecs
 from freqtrade.exchange.exchange_utils import price_to_precision
+from freqtrade.ft_types import AnnotationType
 from freqtrade.loggers import bufferHandler
 from freqtrade.persistence import KeyStoreKeys, KeyValueStore, PairLocks, Trade
 from freqtrade.persistence.models import PairLock
@@ -1299,8 +1300,8 @@ class RPC:
         timeframe: str,
         dataframe: DataFrame,
         last_analyzed: datetime,
-        selected_cols: list[str],
+        selected_cols: list[str] | None,
-        annotations: list[dict[str, Any]] = None,
+        annotations: list[AnnotationType],
     ) -> dict[str, Any]:
         has_content = len(dataframe) != 0
         dataframe_columns = list(dataframe.columns)