scanner: support checking for device - key correspondence

examples/device_scanner.py

@@ -1,6 +1,7 @@
 import asyncio
 import logging
 
+from findmy import KeyPair
 from findmy.scanner import (
     NearbyOfflineFindingDevice,
     OfflineFindingScanner,
@@ -9,6 +10,11 @@ from findmy.scanner import (
 
 logging.basicConfig(level=logging.INFO)
 
+# Set if you want to check whether a specific key (or accessory!) is in the scan results.
+# Make sure to enter its private key!
+# Leave empty (= None) to not check.
+CHECK_KEY = KeyPair.from_b64("")
+
 
 def _print_nearby(device: NearbyOfflineFindingDevice) -> None:
     print(f"NEARBY Device - {device.mac_address}")
@@ -37,6 +43,8 @@ async def scan() -> None:
     print("Scanning for FindMy-devices...")
     print()
 
+    scan_device = None
+
     async for device in scanner.scan_for(10, extend_timeout=True):
         if isinstance(device, NearbyOfflineFindingDevice):
             _print_nearby(device)
@@ -45,6 +53,15 @@ async def scan() -> None:
         else:
             print(f"Unknown device: {device}")
             print()
+            continue
+
+        if CHECK_KEY and device.is_from(CHECK_KEY):
+            scan_device = device
+
+    if scan_device:
+        print("Key or accessory was found in scan results! :D")
+    elif CHECK_KEY:
+        print("Selected key or accessory was not found in scan results... :c")
 
 
 if __name__ == "__main__":