prepare to merge history keeper and rpc

lib/historyKeeper.js

@@ -1,6 +1,5 @@
 /* jshint esversion: 6 */
 /* global Buffer */
-;(function () { 'use strict';
 
 const nThen = require('nthen');
 const Nacl = require('tweetnacl/nacl-fast');
@@ -63,6 +62,8 @@ const isValidValidateKeyString = function (key) {
     }
 };
 
+var CHECKPOINT_PATTERN = /^cp\|(([A-Za-z0-9+\/=]+)\|)?/;
+
 module.exports.create = function (cfg) {
     const rpc = cfg.rpc;
     const tasks = cfg.tasks;
@@ -385,8 +386,6 @@ module.exports.create = function (cfg) {
         return true;
     };
 
-    var CHECKPOINT_PATTERN = /^cp\|(([A-Za-z0-9+\/=]+)\|)?/;
-
     /*  onChannelMessage
         Determine what we should store when a message a broadcasted to a channel"
 
@@ -992,5 +991,3 @@ module.exports.create = function (cfg) {
         onDirectMessage: onDirectMessage,
     };
 };
-
-}());