Add more type annotations

kittens/transfer/receive.py

@@ -146,7 +146,7 @@ class Manager:
                     self.failed_specs[fid] = ftc.status
                 else:
                     if ftc.status == 'OK':
-                        self.state == State.transferring
+                        self.state = State.transferring
                         return ''
                     else:
                         return ftc.status

kittens/transfer/utils.py

@@ -5,7 +5,7 @@ import os
 from contextlib import contextmanager
 from datetime import timedelta
 from mimetypes import guess_type
-from typing import Callable, Generator, Union, cast
+from typing import Callable, Generator, Union
 
 from kitty.fast_data_types import truncate_point_for_length, wcswidth
 from kitty.types import run_once
@@ -154,8 +154,7 @@ def short_uuid_func() -> Callable[[], str]:
 
 
 def random_id() -> str:
-    f = short_uuid_func()
-    return cast(str, f())
+    return short_uuid_func()()
 
 
 @contextmanager