session-desktop/js/keychange_listener.js

(function() {
  'use strict';
  window.Whisper = window.Whisper || {};

  Whisper.KeyChangeListener = {
    init: function(signalProtocolStore) {
      if (!(signalProtocolStore instanceof SignalProtocolStore)) {
        throw new Error('KeyChangeListener requires a SignalProtocolStore');
      }

      signalProtocolStore.on('keychange', function(id) {
        ConversationController.getOrCreateAndWait(id, 'private').then(function(
          conversation
        ) {
          conversation.addKeyChange(id);

          ConversationController.getAllGroupsInvolvingId(id).then(function(
            groups
          ) {
            _.forEach(groups, function(group) {
              group.addKeyChange(id);
            });
          });
        });
      });
    },
  };
})();