diff --git a/src/chatdialog.h b/src/chatdialog.h
index 77feea1..e482169 100644
--- a/src/chatdialog.h
+++ b/src/chatdialog.h
@@ -15,6 +15,10 @@
 
 #ifndef Q_MOC_RUN
 #include <ndn.cxx/data.h>
+#include <ndn.cxx/security/keychain.h>
+#include <ndn.cxx/wrapper/wrapper.h>
+#include "chatroom-policy-manager.h"
+#include "contact-item.h"
 #endif
 
 namespace Ui {
@@ -28,6 +32,7 @@
 public:
   explicit ChatDialog(const ndn::Name& chatroomPrefix,
                       const ndn::Name& localPrefix,
+                      const ndn::Name& defaultIdentity,
                       QWidget *parent = 0);
   ~ChatDialog();
 
@@ -40,12 +45,39 @@
   { return m_localPrefix; }
 
   void
-  sendInvitation();
+  sendInvitation(ndn::Ptr<ContactItem> contact);
 
 private:
+  void
+  setWrapper();
+  
+  void 
+  onInviteReplyVerified(ndn::Ptr<ndn::Data> data, const ndn::Name& identity);
+
+  void 
+  onInviteTimeout(ndn::Ptr<ndn::Closure> closure, 
+                  ndn::Ptr<ndn::Interest> interest, 
+                  const ndn::Name& identity, 
+                  int retry);
+
+  void
+  invitationRejected(const ndn::Name& identity);
+  
+  void 
+  invitationAccepted(const ndn::Name& identity);
+
+  void
+  onUnverified(ndn::Ptr<ndn::Data> data);
+    
+private:
   Ui::ChatDialog *ui;
   ndn::Name m_chatroomPrefix;
   ndn::Name m_localPrefix;
+  ndn::Name m_defaultIdentity;
+  ndn::Ptr<ChatroomPolicyManager> m_policyManager;
+  ndn::Ptr<ndn::security::IdentityManager> m_identityManager;
+  ndn::Ptr<ndn::security::Keychain> m_keychain;
+  ndn::Ptr<ndn::Wrapper> m_handler;
 };
 
 #endif // ChatDIALOG_H