Additional async rewrite

lib/ProtocolResolver.js

@@ -0,0 +1,22 @@
+const Path = require('path'),
+    fs = require('fs'),
+    Core = require('../protocols/core');
+
+class ProtocolResolver {
+    constructor() {
+        this.protocolDir = Path.normalize(__dirname+'/../protocols');
+    }
+
+    /**
+     * @returns Core
+     */
+    create(protocolId) {
+        protocolId = Path.basename(protocolId);
+        const path = this.protocolDir+'/'+protocolId;
+        if(!fs.existsSync(path+'.js')) throw Error('Protocol definition file missing: '+type);
+        const protocol = require(path);
+        return new protocol();
+    }
+}
+
+module.exports = ProtocolResolver;