refactor: downlevel, use strict

.jshintrc

@@ -18,7 +18,7 @@
   "quotmark": "single",
   "regexp": true,
   "smarttabs": false,
-  "strict": false,
+  "strict": true,
   "trailing": true,
   "undef": true,
   "unused": true,

lib/scaffold/default-config.js

@@ -1,7 +1,9 @@
+'use strict';
+
 var path = require('path');
 var mkdirp = require('mkdirp');
 var fs = require('fs');
-var package = require('../../package');
+var packageJson = require('../../package');
 
 function getMajorVersion(versionString) {
   return parseInt(versionString.split('.')[0]);
@@ -28,10 +30,10 @@ function getDefaultConfig(options) {
   }
 
   if (fs.existsSync(defaultConfigFile)) {
-    const currentConfig = require(defaultConfigFile);
+    var currentConfig = require(defaultConfigFile);
 
     // config must have a `version` field with major equal to package major version
-    if(currentConfig.version && getMajorVersion(package.version) === getMajorVersion(currentConfig.version)) {
+    if(currentConfig.version && getMajorVersion(packageJson.version) === getMajorVersion(currentConfig.version)) {
       return {
         path: defaultPath,
         config: currentConfig
@@ -40,17 +42,17 @@ function getDefaultConfig(options) {
 
     console.log(`The configuration file at '${defaultConfigFile}' is incompatible with this version of Bitcore.`);
 
-    const now = new Date();
+    var now = new Date();
     // bitcore-node.YYYY-MM-DD.UnixTimestamp.json
-    const backupFileName = `bitcore-node.${now.getUTCFullYear()}-${now.getUTCMonth()}-${now.getUTCDate()}.${now.getTime()}.json`;
-    const backupFile = path.resolve(defaultPath, backupFileName);
+    var backupFileName = `bitcore-node.${now.getUTCFullYear()}-${now.getUTCMonth()}-${now.getUTCDate()}.${now.getTime()}.json`;
+    var backupFile = path.resolve(defaultPath, backupFileName);
     fs.renameSync(defaultConfigFile, backupFile);
     console.log(`The previous configuration file has been moved to: ${backupFile}.`);
   }
 
   console.log(`Creating a new configuration file at: ${defaultConfigFile}.`);
 
-  const defaultServices = [
+  var defaultServices = [
     'address',
     'block',
     'db',
@@ -70,7 +72,7 @@ function getDefaultConfig(options) {
   }
 
   var defaultConfig = {
-    version: package.version,
+    version: packageJson.version,
     network: 'livenet',
     port: 3001,
     services: options.additionalServices ? defaultServices.concat(options.additionalServices) : defaultServices,

lib/scaffold/start.js

@@ -1,3 +1,5 @@
+'use strict';
+
 var path = require('path');
 var BitcoreNode = require('../node');
 var index = require('../');
@@ -84,7 +86,7 @@ function lookInRequirePathConfig(req, service) {
 }
 
 function lookInCwd(req, service) {
-  const location = service.config.cwdRequirePath ? service.config.cwdRequirePath : service.name;
+  var location = service.config.cwdRequirePath ? service.config.cwdRequirePath : service.name;
   try {
     return req(process.cwd() + '/' + location);
   } catch(e) {

lib/services/p2p/index.js

@@ -332,7 +332,7 @@ P2P.prototype._setResourceFilter = function(filter, resource) {
 };
 
 P2P.prototype._startBcoin = function() {
-  const network = ['livenet', 'live', 'main', 'mainnet'].indexOf(this.node.network) !== -1? 'main' : 'testnet';
+  var network = ['livenet', 'live', 'main', 'mainnet'].indexOf(this.node.network) !== -1? 'main' : 'testnet';
   this._bcoin = new Bcoin({
     network: network,
     prefix: this.node.datadir