Resolve comments

src/protocols/secure_channel/PairingSession.cpp

@@ -61,7 +61,7 @@ void PairingSession::Finish()
 {
     Transport::PeerAddress address = mExchangeCtxt->GetSessionHandle()->AsUnauthenticatedSession()->GetPeerAddress();
 
-    // Discard the exchange so that Clear() doesn't try closing it. The exchange will handle that.
+    // Discard the exchange so that our subclasses don't try closing it. The exchange will handle that.
     DiscardExchange();
 
     CHIP_ERROR err = ActivateSecureSession(address);
@@ -104,7 +104,7 @@ void PairingSession::DiscardExchange()
         // Make sure the exchange doesn't try to notify us when it closes,
         // since we might be dead by then.
         mExchangeCtxt->SetDelegate(nullptr);
-        // Null out mExchangeCtxt so that Clear() doesn't try closing it.  The
+        // Null out mExchangeCtxt so that our subclasses don't try closing it.  The
         // exchange will handle that.
         mExchangeCtxt = nullptr;
     }

src/protocols/secure_channel/PairingSession.h

@@ -98,9 +98,9 @@ class DLL_EXPORT PairingSession
 
     void Finish();
 
-    void AbortExchange();
-    void CloseExchange();
-    void DiscardExchange();
+    void AbortExchange();   // Called when error happens, terminate the pairing.
+    void CloseExchange();   // Called inside `Clear` to guarentee that the exchange is not leaked.
+    void DiscardExchange(); // Clear our reference to our exchange context pointer so that it can close itself at some later time.
 
     void SetPeerSessionId(uint16_t id) { mPeerSessionId.SetValue(id); }
     virtual void OnSuccessStatusReport() {}