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diff --git a/src/lib/core.js b/src/lib/core.js
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+/**
+ * @project iii-for-vk
+ * @author Valentin Popov <info@valentineus.link>
+ * @license See LICENSE.md file included in this distribution.
+ */
+import urlParseLax from 'url-parse-lax';
+import queryString from 'querystring';
+import iiiClient from 'iii-client';
+import EventEmitter from 'events';
+import inherits from 'inherits';
+import https from 'https';
+import SDK from 'vksdk';
+
+inherits(Bot, EventEmitter);
+module.exports = Bot;
+
+/**
+ * Class representing a Bot.
+ * @class
+ */
+function Bot(opts) {
+    opts = opts || {};
+    var self = this;
+
+    self.uuid = opts.uuid;
+    self.token = opts.token;
+    self.appID = opts.appID;
+    self.appSecret = opts.appSecret;
+}
+
+/**
+ * Initial initialization of all systems and services.
+ * @param {requestCallback} callback - The callback that handles the response.
+ */
+Bot.prototype.init = function(callback) {
+    var self = this;
+
+    // Initialize the connection to the social network
+    self._vk = new SDK({
+        appId: self.appID,
+        appSecret: self.appSecret,
+        https: true,
+        secure: true
+    });
+
+    // Setting the user's token
+    self._vk.setToken(self.token);
+
+    // Starting services
+    self._eventLoop();
+    // Connecting filters
+    self._filterMessages();
+
+    // Connecting to the bot server
+    iiiClient.connect(self.uuid, (raw) => callback(raw.cuid));
+};
+
+/**
+ * Receive a message by its ID.
+ * @param {Number} id - The message ID.
+ * @param {requestCallback} callback - The callback that handles the response.
+ */
+Bot.prototype.getMessageByID = function(id, callback) {
+    id = id || false;
+    var self = this;
+
+    self._vk.request('messages.getById', {
+        message_ids: id,
+        preview_length: 0
+    }, (raw) => {
+        if (raw.error) throw new Error(raw.error.error_msg);
+        callback(raw.response.items.shift());
+    });
+};
+
+/**
+ * Simplifies the sending of a message to the user.
+ * The social network API is used.
+ * More information: https://vk.com/dev/messages.send
+ * @param {Object} options - Object with parameters.
+ * @param {Object} options.user_id - User ID.
+ * @param {Object} options.message - Message text.
+ * @param {requestCallback} callback - The callback that handles the response.
+ */
+Bot.prototype.sendMessageToVK = function(options) {
+    options = options || {};
+    var self = this;
+    self._vk.request('messages.send', options, () => {});
+};
+
+/**
+ * Simplifies sending a message to the bot.
+ * @param {Object} options - Object with parameters.
+ * @param {Object} options.cuid - Session identifier.
+ * @param {Object} options.text - Message text.
+ * @param {requestCallback} callback - The callback that handles the response.
+ */
+Bot.prototype.sendMessageToBot = function(options, callback) {
+    options = options || {};
+    iiiClient.send(options, (answer) => callback(answer));
+};
+
+/**
+ * The event startup service.
+ */
+Bot.prototype._eventLoop = function() {
+    var self = this;
+
+    self._getEvents();
+    self.on('events', (data) => {
+        self._getEvents(data.ts);
+    });
+};
+
+/**
+ * Filter events for incoming messages.
+ * @fires: Bot#messages
+ */
+Bot.prototype._filterMessages = function() {
+    var self = this;
+
+    self.on('events', function(data) {
+        data.updates.filter(function(item) {
+            if (item[0] == 4) self.emit('messages', item);
+        });
+    });
+};
+
+/**
+ * Obtaining the Long Poll server address.
+ * @param {requestCallback} callback - The callback that handles the response.
+ */
+Bot.prototype._getLongPollServer = function(callback) {
+    var self = this;
+
+    self._vk.request('messages.getLongPollServer', {
+        need_pts: false
+    }, (raw) => {
+        if (raw.error) throw new Error(raw.error.error_msg);
+        callback(raw.response);
+    });
+};
+
+/**
+ * Waiting and returning the event.
+ * @fires: Bot#events
+ * @param {String=} [ts] - The ID of the last event.
+ */
+Bot.prototype._getEvents = function(ts) {
+    var self = this;
+
+    // Server address request
+    self._getLongPollServer(function(raw) {
+        ts = ts || raw.ts;
+
+        // Analysis of the connection address
+        var url = urlParseLax(raw.server);
+
+        // Details: https://vk.com/dev/using_longpoll
+        var options = queryString.stringify({
+            act: 'a_check',
+            key: raw.key,
+            ts: ts,
+            wait: 25,
+            mode: 2,
+            version: 1
+        });
+
+        // Configuring the connection
+        var query = {
+            hostname: url.hostname,
+            path: url.pathname + '?' + options
+        };
+
+        https.get(query, function(response) {
+            var answer = {};
+            response.setEncoding('utf8');
+            response.on('data', (data) => answer = data);
+            response.on('end', () => {
+                answer = JSON.parse(answer);
+                self.emit('events', answer);
+            });
+        }).on('error', (error) => Error(error));
+    });
+};