Fix last_process related bug in RPC.health

freqtrade/rpc/api_server/api_schemas.py

@@ -456,5 +456,5 @@ class SysInfo(BaseModel):
 
 
 class Health(BaseModel):
-    last_process: datetime
-    last_process_ts: int
+    last_process: Optional[datetime]
+    last_process_ts: Optional[int]

freqtrade/rpc/api_server/api_v1.py

@@ -346,4 +346,4 @@ def sysinfo():
 
 @router.get('/health', response_model=Health, tags=['info'])
 def health(rpc: RPC = Depends(get_rpc)):
-    return rpc._health()
+    return rpc.health()

freqtrade/rpc/rpc.py

@@ -89,7 +89,7 @@ class RPC:
     # Bind _fiat_converter if needed
     _fiat_converter: Optional[CryptoToFiatConverter] = None
 
-    def __init__(self, freqtrade) -> None:
+    def __init__(self, freqtrade: "FreqtradeBot") -> None:
         """
         Initializes all enabled rpc modules
         :param freqtrade: Instance of a freqtrade bot
@@ -1198,10 +1198,17 @@ class RPC:
             "ram_pct": psutil.virtual_memory().percent
         }
 
-    def _health(self) -> Dict[str, Union[str, int]]:
+    def health(self) -> Dict[str, Optional[Union[str, int]]]:
         last_p = self._freqtrade.last_process
+        if last_p is None:
+            return {
+                "last_process": None,
+                "last_process_loc": None,
+                "last_process_ts": None,
+            }
+
         return {
-            'last_process': str(last_p),
-            'last_process_loc': last_p.astimezone(tzlocal()).strftime(DATETIME_PRINT_FORMAT),
-            'last_process_ts': int(last_p.timestamp()),
+            "last_process": str(last_p),
+            "last_process_loc": last_p.astimezone(tzlocal()).strftime(DATETIME_PRINT_FORMAT),
+            "last_process_ts": int(last_p.timestamp()),
         }

freqtrade/rpc/telegram.py

@@ -1527,7 +1527,7 @@ class Telegram(RPCHandler):
         Handler for /health
         Shows the last process timestamp
         """
-        health = self._rpc._health()
+        health = self._rpc.health()
         message = f"Last process: `{health['last_process_loc']}`"
         self._send_msg(message)