Improve logging and use Future to mark completion

Instead of using an Event use a Future to mark completion of the update.
This allows to set an Exception in case we see update state transitions
which are unexpected (specifically kQuerying -> kIdle).

matter_server/server/device_controller.py

@@ -910,6 +910,9 @@ async def update_node(
         notify the node about the new update.
         """
 
+        node_logger = LOGGER.getChild(f"node_{node_id}")
+        node_logger.info("Update to software version %r", software_version)
+
         update = await self._check_node_update(node_id, software_version)
         if update is None:
             raise UpdateCheckError(
@@ -923,6 +926,7 @@ async def update_node(
 
         await ota_provider.initialize()
 
+        node_logger.info("Downloading update from '%s'", update["otaUrl"])
         await ota_provider.download_update(update)
 
         self._attribute_update_callbacks.setdefault(node_id, []).append(
@@ -931,6 +935,7 @@ async def update_node(
 
         try:
             # Make sure any previous instances get stopped
+            node_logger.info("Starting update using OTA Provider.")
             await ota_provider.start_update(
                 self._chip_device_controller,
                 node_id,

matter_server/server/ota/provider.py

@@ -75,7 +75,7 @@ def __init__(self, vendor_id: int, ota_provider_dir: Path) -> None:
         self._ota_file_path: Path | None = None
         self._ota_provider_proc: Process | None = None
         self._ota_provider_task: asyncio.Task | None = None
-        self._ota_done: asyncio.Event = asyncio.Event()
+        self._ota_done: asyncio.Future = asyncio.Future()
         self._ota_target_node_id: int | None = None
 
     async def initialize(self) -> None:
@@ -161,11 +161,9 @@ async def _commission_ota_provider(
                     "Failed writing adjusted OTA Provider App ACL: Status %s.",
                     str(write_result[0].Status),
                 )
-                await self.stop()
                 raise UpdateError("Error while setting up OTA Provider.")
         except ChipStackError as ex:
             logging.exception("Failed adjusting OTA Provider App ACL.", exc_info=ex)
-            await self.stop()
             raise UpdateError("Error while setting up OTA Provider.") from ex
 
     async def start_update(
@@ -239,8 +237,11 @@ async def start_update(
                     "Error while announcing OTA Provider to node."
                 ) from ex
 
-            await self._ota_done.wait()
+            LOGGER.info("Waiting for target node update state change")
+            await self._ota_done
+            LOGGER.info("OTA update finished successfully")
         finally:
+            LOGGER.info("Cleaning up OTA provider")
             await self.stop()
             self._ota_target_node_id = None
 
@@ -345,30 +346,28 @@ async def check_update_state(
     ) -> None:
         """Check the update state of a node and take appropriate action."""
 
-        LOGGER.info("Update state changed: %s, %s %s", str(path), old_value, new_value)
         if str(path) != OTA_SOFTWARE_UPDATE_REQUESTOR_UPDATE_STATE_ATTRIBUTE_PATH:
             return
 
-        update_state = cast(
-            Clusters.OtaSoftwareUpdateRequestor.Enums.UpdateStateEnum, new_value
-        )
+        UpdateState = Clusters.OtaSoftwareUpdateRequestor.Enums.UpdateStateEnum  # noqa: N806
 
-        old_update_state = cast(
-            Clusters.OtaSoftwareUpdateRequestor.Enums.UpdateStateEnum, old_value
+        new_update_state = UpdateState(new_value)
+        old_update_state = UpdateState(old_value)
+
+        LOGGER.info(
+            "Update state changed from %r to %r",
+            old_update_state,
+            new_update_state,
         )
 
         # Update state of target node changed, check if update is done.
-        if (
-            update_state
-            == Clusters.OtaSoftwareUpdateRequestor.Enums.UpdateStateEnum.kIdle
-        ):
-            if (
-                old_update_state
-                == Clusters.OtaSoftwareUpdateRequestor.Enums.UpdateStateEnum.kQuerying
-            ):
-                raise UpdateError("Target node did not process the update file")
+        if new_update_state == UpdateState.kIdle:
+            if old_update_state == UpdateState.kQuerying:
+                self._ota_done.set_exception(
+                    UpdateError("Target node did not process the update file")
+                )
 
             LOGGER.info(
                 "Node %d update state idle, assuming done.", self._ota_target_node_id
             )
-            self._ota_done.set()
+            self._ota_done.set_result(None)