chore: added review fix

Signed-off-by: Manish Dait <daitmanish88@gmail.com>

Author: manishdait

src/hiero_sdk_python/client/client.py

@@ -70,11 +70,11 @@ def __init__(self, network: Network = None) -> None:
         self.logger: Logger = Logger(LogLevel.from_env(), "hiero_sdk_python")
 
     @property
-    def mirror_stub(self) -> mirror_consensus_grpc.ConsensusServiceStub | None:
+    def mirror_stub(self) -> mirror_consensus_grpc.ConsensusServiceStub:
         return self.network.get_mirror_stub()
 
     @property
-    def mirror_channel(self) -> grpc.Channel | None:
+    def mirror_channel(self) -> grpc.Channel:
         self.network.get_mirror_stub()
         return self.network._mirror_channel
 

src/hiero_sdk_python/client/network.py

@@ -99,11 +99,11 @@ def __init__(
             Use Client.set_transport_security() and Client.set_verify_certificates() to customize.
         """
         self.network: str = network or "localhost"
-        self._mirror_address: str = mirror_address or self.MIRROR_ADDRESS_DEFAULT.get(network, "localhost:5600")
-        self._mirror_channel = None
-        self._mirror_stub: mirror_consensus_grpc.ConsensusServiceStub = None
+        self._mirror_address: str = mirror_address or self.MIRROR_ADDRESS_DEFAULT.get(self.network, "localhost:5600")
+        self._mirror_channel: grpc.Channel | None = None
+        self._mirror_stub: mirror_consensus_grpc.ConsensusServiceStub | None = None
 
-        self.ledger_id = ledger_id or self.LEDGER_ID.get(network, bytes.fromhex("03"))
+        self.ledger_id = ledger_id or self.LEDGER_ID.get(self.network, bytes.fromhex("03"))
 
         # Default TLS configuration: enabled for hosted networks, disabled for local/custom
         hosted_networks = ("mainnet", "testnet", "previewnet")