processVerifiedMessage: Archive all sessions when key changes

FREEBIE

js/models/conversations.js

@@ -111,13 +111,13 @@
         }.bind(this)).then(function() {
             this.addVerifiedChange(this.id, verified === VERIFIED, {local: !options.viaSyncMessage});
             if (!options.viaSyncMessage) {
-                this.sendVerifySyncMessage(this.id, verified);
+                return this.sendVerifySyncMessage(this.id, verified);
             }
         }.bind(this));
     },
     sendVerifySyncMessage: function(number, state) {
         textsecure.storage.protocol.loadIdentityKey(number).then(function(key) {
-            textsecure.messaging.syncVerification(number, state, key);
+            return textsecure.messaging.syncVerification(number, state, key);
         });
     },
     isVerified: function() {

js/signal_protocol_store.js

@@ -606,17 +606,20 @@
                             || (isPresent && !isEqual)
                             || (isPresent && identityRecord.get('verified') !== VerifiedStatus.VERIFIED))) {
 
-                        if (!isPresent || !isEqual) {
-                            this.trigger('keychange', identifier);
-                        }
-
                         textsecure.storage.protocol.saveIdentityWithAttributes(identifier, {
                             publicKey           : publicKey,
                             verified            : verifiedStatus,
                             firstUse            : false,
                             timestamp           : Date.now(),
                             nonblockingApproval : true
-                        }).then(resolve, reject);
+                        }).then(function() {
+                            if (!isPresent || !isEqual) {
+                                this.trigger('keychange', identifier);
+                                return this.archiveAllSessions(identifier).then(resolve, reject);
+                            }
+
+                            return resolve();
+                        }.bind(this), reject);
                     }
                 }.bind(this));
             }.bind(this));