1 files changed, 10 insertions, 6 deletions
diff --git a/synapse/http/client.py b/synapse/http/client.py
index b2c9a7c670..084d0a5b84 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -43,8 +43,10 @@ from twisted.internet import defer, error as twisted_error, protocol, ssl
 from twisted.internet.address import IPv4Address, IPv6Address
 from twisted.internet.interfaces import (
     IAddress,
+    IDelayedCall,
     IHostResolution,
     IReactorPluggableNameResolver,
+    IReactorTime,
     IResolutionReceiver,
     ITCPTransport,
 )
@@ -121,13 +123,15 @@ def check_against_blacklist(
 _EPSILON = 0.00000001
 
 
-def _make_scheduler(reactor):
+def _make_scheduler(
+    reactor: IReactorTime,
+) -> Callable[[Callable[[], object]], IDelayedCall]:
     """Makes a schedular suitable for a Cooperator using the given reactor.
 
     (This is effectively just a copy from `twisted.internet.task`)
     """
 
-    def _scheduler(x):
+    def _scheduler(x: Callable[[], object]) -> IDelayedCall:
         return reactor.callLater(_EPSILON, x)
 
     return _scheduler
@@ -775,7 +779,7 @@ class SimpleHttpClient:
         )
 
 
-def _timeout_to_request_timed_out_error(f: Failure):
+def _timeout_to_request_timed_out_error(f: Failure) -> Failure:
     if f.check(twisted_error.TimeoutError, twisted_error.ConnectingCancelledError):
         # The TCP connection has its own timeout (set by the 'connectTimeout' param
         # on the Agent), which raises twisted_error.TimeoutError exception.
@@ -809,7 +813,7 @@ class _DiscardBodyWithMaxSizeProtocol(protocol.Protocol):
     def __init__(self, deferred: defer.Deferred):
         self.deferred = deferred
 
-    def _maybe_fail(self):
+    def _maybe_fail(self) -> None:
         """
         Report a max size exceed error and disconnect the first time this is called.
         """
@@ -933,12 +937,12 @@ class InsecureInterceptableContextFactory(ssl.ContextFactory):
     Do not use this since it allows an attacker to intercept your communications.
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         self._context = SSL.Context(SSL.SSLv23_METHOD)
         self._context.set_verify(VERIFY_NONE, lambda *_: False)
 
     def getContext(self, hostname=None, port=None):
         return self._context
 
-    def creatorForNetloc(self, hostname, port):
+    def creatorForNetloc(self, hostname: bytes, port: int):
         return self