standardnotes-app/app/assets/javascripts/app/services/sessionHistory.js

class SessionHistory extends SFSessionHistoryManager {

  constructor(modelManager, storageManager, authManager, passcodeManager, $timeout) {

    SFItemHistory.HistoryEntryClassMapping = {
      "Note" : NoteHistoryEntry
    }

    var keyRequestHandler = async () => {
      let offline = authManager.offline();
      let auth_params = offline ? passcodeManager.passcodeAuthParams() : await authManager.getAuthParams();
      let keys = offline ? passcodeManager.keys() : await authManager.keys();
      return {
        keys: keys,
        offline: offline,
        auth_params: auth_params
      }
    }

    var contentTypes = ["Note"];
    super(modelManager, storageManager, keyRequestHandler, contentTypes, $timeout);
  }
}

angular.module('app').service('sessionHistory', SessionHistory);