diff --git a/src/config/modes.ts b/src/config/modes.ts
index 3b975964..9c871268 100644
--- a/src/config/modes.ts
+++ b/src/config/modes.ts
@@ -18,7 +18,7 @@ const Modes = {
   ssl: true, // location.search.indexOf('ssl=1') > 0 || location.protocol === 'https:' && location.search.indexOf('ssl=0') === -1,
   multipleConnections: true,
   asServiceWorker: false,
-  transport: 'https' as TransportType
+  transport: 'websocket' as TransportType
 };
 
 /// #if MTPROTO_HAS_HTTP
diff --git a/src/lib/mtproto/apiManager.ts b/src/lib/mtproto/apiManager.ts
index f11ae3c6..a1ed18a2 100644
--- a/src/lib/mtproto/apiManager.ts
+++ b/src/lib/mtproto/apiManager.ts
@@ -36,6 +36,10 @@ import Modes from '../../config/modes';
 import rootScope from '../rootScope';
 /// #endif
 
+/// #if MTPROTO_AUTO
+import transportController from './transports/controller';
+/// #endif
+
 /* var networker = apiManager.cachedNetworkers.websocket.upload[2];
 networker.wrapMtpMessage({
   _: 'msgs_state_req',
@@ -106,6 +110,12 @@ export class ApiManager {
     this.afterMessageTempIds = {};
 
     this.transportType = Modes.transport;
+
+    /// #if MTPROTO_AUTO
+    transportController.addEventListener('transport', (transportType) => {
+      this.changeTransportType(transportType);
+    });
+    /// #endif
   }
 
   //private lol = false;
@@ -168,6 +178,12 @@ export class ApiManager {
 
   public changeTransportType(transportType: TransportType) {
     const oldTransportType = this.transportType;
+    if(oldTransportType === transportType) {
+      return;
+    }
+
+    this.log('changing transport from', oldTransportType, 'to', transportType);
+
     const oldObject = this.cachedNetworkers[oldTransportType];
     const newObject = this.cachedNetworkers[transportType];
     this.cachedNetworkers[transportType] = oldObject;
@@ -274,7 +290,7 @@ export class ApiManager {
     //const connectionType: ConnectionType = 'client';
 
     const transportType = this.getTransportType(connectionType);
-    if(!this.cachedNetworkers.hasOwnProperty(transportType)) {
+    if(!this.cachedNetworkers[transportType]) {
       this.cachedNetworkers[transportType] = {
         client: {},
         download: {},
@@ -312,7 +328,7 @@ export class ApiManager {
     const ak: DcAuthKey = `dc${dcId}_auth_key` as any;
     const ss: DcServerSalt = `dc${dcId}_server_salt` as any;
     
-    const transport = this.chooseServer(dcId, connectionType, transportType);
+    let transport = this.chooseServer(dcId, connectionType, transportType);
     return this.gettingNetworkers[getKey] = Promise.all([ak, ss].map(key => sessionStorage.get(key)))
     .then(async([authKeyHex, serverSaltHex]) => {
       let networker: MTPNetworker;
@@ -325,19 +341,17 @@ export class ApiManager {
         const authKeyId = (await CryptoWorker.invokeCrypto('sha1-hash', authKey)).slice(-8);
         const serverSalt = bytesFromHex(serverSaltHex);
         
-        networker = networkerFactory.getNetworker(dcId, authKey, authKeyId, serverSalt, transport, options);
+        networker = networkerFactory.getNetworker(dcId, authKey, authKeyId, serverSalt, options);
       } else {
         try { // if no saved state
           const auth = await authorizer.auth(dcId);
   
-          const storeObj = {
+          sessionStorage.set({
             [ak]: bytesToHex(auth.authKey),
             [ss]: bytesToHex(auth.serverSalt)
-          };
-          
-          sessionStorage.set(storeObj);
+          });
           
-          networker = networkerFactory.getNetworker(dcId, auth.authKey, auth.authKeyId, auth.serverSalt, transport, options);
+          networker = networkerFactory.getNetworker(dcId, auth.authKey, auth.authKeyId, auth.serverSalt, options);
         } catch(error) {
           this.log('Get networker error', error, (error as Error).stack);
           delete this.gettingNetworkers[getKey];
@@ -345,6 +359,16 @@ export class ApiManager {
         }
       }
 
+      // ! cannot get it before this promise because simultaneous changeTransport will change nothing
+      const newTransportType = this.getTransportType(connectionType);
+      if(newTransportType !== transportType) {
+        transport.destroy();
+        DcConfigurator.removeTransport(dcConfigurator.chosenServers, transport);
+        transport = this.chooseServer(dcId, connectionType, newTransportType);
+      }
+
+      networker.changeTransport(transport);
+
       /* networker.onConnectionStatusChange = (online) => {
         console.log('status:', online);
       }; */
@@ -377,7 +401,6 @@ export class ApiManager {
           networker.destroy();
           networkerFactory.removeNetworker(networker);
           DcConfigurator.removeTransport(this.cachedNetworkers, networker);
-          DcConfigurator.removeTransport(dcConfigurator.chosenServers, networker.transport);
         };
 
         networker.setDrainTimeout();
diff --git a/src/lib/mtproto/authorizer.ts b/src/lib/mtproto/authorizer.ts
index 7d28e7bd..320cb8a1 100644
--- a/src/lib/mtproto/authorizer.ts
+++ b/src/lib/mtproto/authorizer.ts
@@ -10,7 +10,7 @@
  */
 
 import { TLSerialization, TLDeserialization } from "./tl_utils";
-import dcConfigurator from "./dcConfigurator";
+import dcConfigurator, { TransportType } from "./dcConfigurator";
 import rsaKeysManager from "./rsaKeysManager";
 import timeManager from "./timeManager";
 
@@ -24,6 +24,10 @@ import { addPadding } from "./bin_utils";
 import { Awaited, DcId } from "../../types";
 import { ApiError } from "./apiManager";
 
+/// #if MTPROTO_AUTO
+import transportController from "./transports/controller";
+/// #endif
+
 /* let fNewNonce: any = bytesFromHex('8761970c24cb2329b5b2459752c502f3057cb7e8dbab200e526e8767fdc73b3c').reverse();
 let fNonce: any = bytesFromHex('b597720d11faa5914ef485c529cde414').reverse();
 let fResult: any = new Uint8Array(bytesFromHex('000000000000000001b473a0661b285e480000006324160514e4cd29c585f44e91a5fa110d7297b5c0c4134c84893db5715ecd56af5ed618082182053cc5de91cd00000015c4b51c02000000a5b7f709355fc30b216be86c022bb4c3'));
@@ -103,6 +107,12 @@ export class Authorizer {
   };
   
   private log: ReturnType<typeof logger>;
+
+  private transportType: TransportType;
+
+  /// #if MTPROTO_AUTO
+  private getTransportTypePromise: Promise<void>;
+  /// #endif
   
   constructor() {
     this.cached = {};
@@ -122,7 +132,7 @@ export class Authorizer {
     resultArray.set(headerArray);
     resultArray.set(requestArray, headerArray.length);
 
-    const transport = dcConfigurator.chooseServer(dcId);
+    const transport = dcConfigurator.chooseServer(dcId, 'client', this.transportType);
     const baseError = {
       code: 406,
       type: 'NETWORK_BAD_RESPONSE'
@@ -570,18 +580,27 @@ export class Authorizer {
       }
     }
   }
+
+  /// #if MTPROTO_AUTO
+  private getTransportType() {
+    if(this.getTransportTypePromise) return this.getTransportTypePromise;
+    return this.getTransportTypePromise = transportController.pingTransports().then(({websocket}) => {
+      this.transportType = websocket ? 'websocket' : 'https';
+    });
+  }
+  /// #endif
   
   public auth(dcId: DcId) {
     let promise = this.cached[dcId];
     if(promise) {
       return promise;
     }
-    
-    if(!dcConfigurator.chooseServer(dcId)) {
-      throw new Error('[MT] No server found for dc ' + dcId);
-    }
 
     promise = new Promise(async(resolve, reject) => {
+      /// #if MTPROTO_AUTO
+      await this.getTransportType();
+      /// #endif
+
       let error: ApiError;
       let _try = 1;
       while(_try++ <= 3) {
diff --git a/src/lib/mtproto/networker.ts b/src/lib/mtproto/networker.ts
index f05717d5..ddceb3b0 100644
--- a/src/lib/mtproto/networker.ts
+++ b/src/lib/mtproto/networker.ts
@@ -36,6 +36,7 @@ import { bigInt2str, rightShift_, str2bigInt } from '../../vendor/leemon';
 import { forEachReverse } from '../../helpers/array';
 import { ConnectionStatus } from './connectionStatus';
 import ctx from '../../environment/ctx';
+import dcConfigurator, { DcConfigurator } from './dcConfigurator';
 
 //console.error('networker included!', new Error().stack);
 
@@ -104,6 +105,7 @@ export default class MTPNetworker {
   /// #if MTPROTO_HAS_HTTP
   private longPollInterval: number;
   private longPollPending: number;
+  private checkConnectionRetryAt: number;
   private checkConnectionTimeout: number;
   private checkConnectionPeriod = 0;
   private sleepAfter: number;
@@ -148,7 +150,6 @@ export default class MTPNetworker {
     private authKey: Uint8Array, 
     private authKeyId: Uint8Array,
     serverSalt: Uint8Array, 
-    transport: MTTransport, 
     options: InvokeApiOptions = {}
   ) {
     this.authKeyUint8 = convertToUint8Array(this.authKey);
@@ -178,8 +179,6 @@ export default class MTPNetworker {
     //   rootScope.offlineConnecting = true */
     // }
 
-    this.changeTransport(transport);
-
     // * handle outcoming dead socket, server will close the connection
     // if((this.transport as TcpObfuscated).networker) {
     //   this.disconnectDelay = /* (this.transport as TcpObfuscated).retryTimeout  */75;
@@ -366,9 +365,9 @@ export default class MTPNetworker {
   public changeTransport(transport?: MTTransport) {
     const oldTransport = this.transport;
     if(oldTransport) {
-      if((oldTransport as TcpObfuscated).destroy) {
-        (oldTransport as TcpObfuscated).destroy();
-      }
+      oldTransport.destroy();
+
+      DcConfigurator.removeTransport(dcConfigurator.chosenServers, this.transport);
 
       if(this.nextReqTimeout) {
         clearTimeout(this.nextReqTimeout);
@@ -394,22 +393,25 @@ export default class MTPNetworker {
       return;
     }
 
+    transport.networker = this;
+
     /// #if MTPROTO_HAS_HTTP
     /// #if MTPROTO_HAS_WS
     if(transport instanceof HTTP) {
     /// #endif
       this.longPollInterval = ctx.setInterval(this.checkLongPoll, 10000);
       this.checkLongPoll();
+      this.checkConnection('changed transport');
     /// #if MTPROTO_HAS_WS
     }
     /// #endif
     /// #endif
 
-    transport.networker = this;
-
-    if((transport as TcpObfuscated).connected) {
+    if(transport.connected && (transport as TcpObfuscated).connection) {
       this.setConnectionStatus(ConnectionStatus.Connected);
     }
+
+    this.resend();
   }
 
   public destroy() {
@@ -419,12 +421,16 @@ export default class MTPNetworker {
   public forceReconnectTimeout() {
     if((this.transport as TcpObfuscated).reconnect) {
       (this.transport as TcpObfuscated).reconnect();
+    } else {
+      this.resend();
     }
   }
 
   public forceReconnect() {
     if((this.transport as TcpObfuscated).forceReconnect) {
       (this.transport as TcpObfuscated).forceReconnect();
+    } else {
+      this.checkConnection('force reconnect');
     }
   }
 
@@ -603,6 +609,10 @@ export default class MTPNetworker {
       body: serializer.getBytes(true)
     };
 
+    if(this.offline) {
+      this.setConnectionStatus(ConnectionStatus.Connecting);
+    }
+
     this.sendEncryptedRequest(pingMessage).then(() => {
       this.toggleOffline(false);
     }, () => {
@@ -612,91 +622,83 @@ export default class MTPNetworker {
     });
   };
 
-  private toggleOffline(enabled: boolean) {
-    // this.log('toggle ', enabled, this.dcId, this.iii)
-    if(this.offline !== undefined && this.offline === enabled) {
-      return false;
-    }
-  
-    this.offline = enabled;
+  private toggleOffline(offline: boolean) {
+    if(this.offline !== offline) {
+      this.offline = offline;
 
-    if(this.offline) {
-      clearTimeout(this.nextReqTimeout);
-      this.nextReqTimeout = 0;
-      this.nextReq = 0;
-  
-      if(this.checkConnectionPeriod < 1.5) {
-        this.checkConnectionPeriod = 0;
-      }
-  
-      this.checkConnectionTimeout = ctx.setTimeout(this.checkConnection, this.checkConnectionPeriod * 1000 | 0);
-      this.checkConnectionPeriod = Math.min(30, (1 + this.checkConnectionPeriod) * 1.5);
-  
-      /// #if !MTPROTO_WORKER
-      document.body.addEventListener('online', this.checkConnection, false);
-      document.body.addEventListener('focus', this.checkConnection, false);
-      /// #endif
-    } else {
-      this.checkLongPoll();
+      if(offline) {
+        clearTimeout(this.nextReqTimeout);
+        this.nextReqTimeout = 0;
+        this.nextReq = 0;
+        
+        if(this.checkConnectionPeriod < 1.5) {
+          this.checkConnectionPeriod = 0;
+        }
+        
+        const delay = this.checkConnectionPeriod * 1000 | 0;
+        this.checkConnectionRetryAt = Date.now() + delay;
+        this.setConnectionStatus(ConnectionStatus.Closed, this.checkConnectionRetryAt);
+        this.checkConnectionTimeout = ctx.setTimeout(this.checkConnection, delay);
+        this.checkConnectionPeriod = Math.min(30, (1 + this.checkConnectionPeriod) * 1.5);
+    
+        /// #if !MTPROTO_WORKER
+        document.body.addEventListener('online', this.checkConnection, false);
+        document.body.addEventListener('focus', this.checkConnection, false);
+        /// #endif
+      } else {
+        this.setConnectionStatus(ConnectionStatus.Connected);
+        this.checkLongPoll();
 
-      this.scheduleRequest();
-  
-      /// #if !MTPROTO_WORKER
-      document.body.removeEventListener('online', this.checkConnection);
-      document.body.removeEventListener('focus', this.checkConnection);
-      /// #endif
+        this.scheduleRequest();
+    
+        /// #if !MTPROTO_WORKER
+        document.body.removeEventListener('online', this.checkConnection);
+        document.body.removeEventListener('focus', this.checkConnection);
+        /// #endif
 
-      clearTimeout(this.checkConnectionTimeout);
-      this.checkConnectionTimeout = undefined;
+        clearTimeout(this.checkConnectionTimeout);
+        this.checkConnectionTimeout = undefined;
+      }
     }
+
+    this.setConnectionStatus(offline ? ConnectionStatus.Closed : ConnectionStatus.Connected, offline ? this.checkConnectionRetryAt : undefined);
   }
 
   private handleSentEncryptedRequestHTTP(promise: ReturnType<MTPNetworker['sendEncryptedRequest']>, message: MTMessage, noResponseMsgs: string[]) {
+    // let timeout = setTimeout(() => {
+    //   this.log.error('handleSentEncryptedRequestHTTP timeout', promise, message, noResponseMsgs);
+    // }, 5e3);
+
     promise.then((result) => {
       this.toggleOffline(false);
       // this.log('parse for', message);
-      this.parseResponse(result).then((response) => {
-        if(Modes.debug) {
-          this.log.debug('Server response', response);
-        }
+      return this.parseResponse(result).then((response) => {
+        this.debug && this.log.debug('Server response', response);
   
         this.processMessage(response.response, response.messageId, response.sessionId);
-  
-        noResponseMsgs.forEach((msgId) => {
-          if(this.sentMessages[msgId]) {
-            const deferred = this.sentMessages[msgId].deferred;
-            delete this.sentMessages[msgId];
-            deferred.resolve();
-          }
-        });
 
         this.checkLongPoll();
-  
         this.checkConnectionPeriod = Math.max(1.1, Math.sqrt(this.checkConnectionPeriod));
+
+        return true;
       });
     }, (error) => {
       this.log.error('Encrypted request failed', error, message);
   
-      if(message.container) {
-        message.inner.forEach((msgId) => {
-          this.pendingMessages[msgId] = 0;
-        });
+      this.pushResend(message.msg_id);
+      this.toggleOffline(true);
 
-        delete this.sentMessages[message.msg_id];
-      } else {
-        this.pendingMessages[message.msg_id] = 0;
-      }
-  
+      return false;
+    }).then((shouldResolve) => {
+      // clearTimeout(timeout);
       noResponseMsgs.forEach((msgId) => {
         if(this.sentMessages[msgId]) {
           const deferred = this.sentMessages[msgId].deferred;
           delete this.sentMessages[msgId];
           delete this.pendingMessages[msgId];
-          deferred.reject();
+          shouldResolve ? deferred.resolve() : deferred.reject();
         }
       });
-  
-      this.toggleOffline(true);
     });
   }
   /// #endif
@@ -1187,37 +1189,40 @@ export default class MTPNetworker {
 
   private sendEncryptedRequest(message: MTMessage) {
     return this.getEncryptedOutput(message).then(requestData => {
-      this.debug && this.log.debug('sendEncryptedRequest: launching message into space:', message, [message.msg_id].concat(message.inner || []));
-
+      this.debug && this.log.debug('sendEncryptedRequest: launching message into space:', message, [message.msg_id].concat(message.inner || []), requestData.length);
       const promise: Promise<Uint8Array> = this.transport.send(requestData) as any;
-
+      // this.debug && this.log.debug('sendEncryptedRequest: launched message into space:', message, promise);
+      
       /// #if !MTPROTO_HAS_HTTP
       return promise;
       /// #else
-
+      
       /// #if MTPROTO_HAS_WS
       if(!(this.transport instanceof HTTP)) return promise;
       /// #endif
-
+      
       const baseError = {
         code: 406,
         type: 'NETWORK_BAD_RESPONSE',
         transport: this.transport
       };
+      
       return promise.then((result) => {
-        if(!result || !result.byteLength) {
-          return Promise.reject(baseError);
+        if(!result?.byteLength) {
+          throw baseError;
         }
-
+        
+        // this.debug && this.log.debug('sendEncryptedRequest: got response for:', message, [message.msg_id].concat(message.inner || []));
         return result;
       }, (error) => {
         if(!error.message && !error.type) {
           error = Object.assign(baseError, {
-          type: 'NETWORK_BAD_REQUEST',
-          originalError: error
+            type: 'NETWORK_BAD_REQUEST',
+            originalError: error
           });
         }
-        return Promise.reject(error);
+
+        throw error;
       });
       /// #endif
     });
diff --git a/src/lib/mtproto/networkerFactory.ts b/src/lib/mtproto/networkerFactory.ts
index e6d965d5..f2d498b6 100644
--- a/src/lib/mtproto/networkerFactory.ts
+++ b/src/lib/mtproto/networkerFactory.ts
@@ -12,9 +12,9 @@
 import type { ConnectionStatusChange } from "./connectionStatus";
 import MTPNetworker from "./networker";
 import { InvokeApiOptions } from "../../types";
-import MTTransport from "./transports/transport";
 import App from "../../config/app";
 import { MOUNT_CLASS_TO } from "../../config/debug";
+import { indexOfAndSplice } from "../../helpers/array";
 
 export class NetworkerFactory {
   private networkers: MTPNetworker[] = [];
@@ -25,19 +25,16 @@ export class NetworkerFactory {
   public userAgent = navigator.userAgent;
 
   public removeNetworker(networker: MTPNetworker) {
-    const idx = this.networkers.indexOf(networker);
-    if(idx !== -1) {
-      this.networkers.splice(idx, 1);
-    }
+    indexOfAndSplice(this.networkers, networker);
   }
 
   public setUpdatesProcessor(callback: (obj: any) => void) {
     this.updatesProcessor = callback;
   }
 
-  public getNetworker(dcId: number, authKey: Uint8Array, authKeyId: Uint8Array, serverSalt: Uint8Array, transport: MTTransport, options: InvokeApiOptions) {
+  public getNetworker(dcId: number, authKey: Uint8Array, authKeyId: Uint8Array, serverSalt: Uint8Array, options: InvokeApiOptions) {
     //console.log('NetworkerFactory: creating new instance of MTPNetworker:', dcId, options);
-    const networker = new MTPNetworker(dcId, authKey, authKeyId, serverSalt, transport, options);
+    const networker = new MTPNetworker(dcId, authKey, authKeyId, serverSalt, options);
     this.networkers.push(networker);
     return networker;
   }
diff --git a/src/lib/mtproto/transports/controller.ts b/src/lib/mtproto/transports/controller.ts
index 1c4aef26..d4bed753 100644
--- a/src/lib/mtproto/transports/controller.ts
+++ b/src/lib/mtproto/transports/controller.ts
@@ -4,22 +4,110 @@
  * https://github.com/morethanwords/tweb/blob/master/LICENSE
  */
 
-import { TransportType } from "../dcConfigurator";
+import App from "../../../config/app";
+import { deferredPromise } from "../../../helpers/cancellablePromise";
+import EventListenerBase from "../../../helpers/eventListenerBase";
+import { pause } from "../../../helpers/schedulers/pause";
+import dcConfigurator, { TransportType } from "../dcConfigurator";
+import type HTTP from "./http";
+import type TcpObfuscated from "./tcpObfuscated";
+import MTTransport from "./transport";
 
-export class MTTransportController {
+export class MTTransportController extends EventListenerBase<{
+  change: (opened: MTTransportController['opened']) => void,
+  transport: (type: TransportType) => void
+}> {
   private opened: Map<TransportType, number>;
+  private transports: {[k in TransportType]?: MTTransport};
+  private pinging: boolean;
 
   constructor() {
+    super(true);
+
     this.opened = new Map();
+    /* this.addEventListener('change', (opened) => {
+      this.dispatchEvent('transport', opened.get('websocket') || !opened.get('https') ? 'websocket' : 'https');
+    }); */
+
+    this.addEventListener('change', (opened) => {
+      if(!opened.get('websocket')) {
+        this.waitForWebSocket();
+      }
+    });
+
+    setTimeout(() => {
+      this.waitForWebSocket();
+    }, 0);
   }
 
-  public setTransportOpened(type: TransportType, value: boolean) {
+  public async pingTransports() {
+    const timeout = 2000;
+    const transports: {[k in TransportType]?: MTTransport} = this.transports = {
+      https: dcConfigurator.chooseServer(App.baseDcId, 'client', 'https', false),
+      websocket: dcConfigurator.chooseServer(App.baseDcId, 'client', 'websocket', false)
+    };
+
+    const httpPromise = deferredPromise<boolean>();
+    ((this.transports.https as HTTP)._send(new Uint8Array(), 'no-cors') as any as Promise<any>)
+    .then(() => httpPromise.resolve(true), () => httpPromise.resolve(false));
+    setTimeout(() => httpPromise.resolve(false), timeout);
+
+    const websocketPromise = deferredPromise<boolean>();
+    const socket = transports.websocket as TcpObfuscated;
+    socket.setAutoReconnect(false);
+    socket.connection.addEventListener('close', () => websocketPromise.resolve(false), {once: true});
+    socket.connection.addEventListener('open', () => websocketPromise.resolve(true), {once: true});
+    setTimeout(() => websocketPromise.resolve(false), timeout);
+
+    const [isHttpAvailable, isWebSocketAvailable] = await Promise.all([httpPromise, websocketPromise]);
+
+    for(const transportType in transports) {
+      const transport = transports[transportType as TransportType];
+      transport.destroy();
+    }
+
+    return {
+      https: isHttpAvailable || this.opened.get('https') > 0,
+      websocket: isWebSocketAvailable || this.opened.get('websocket') > 0
+    };
+  }
+
+  public async waitForWebSocket() {
+    if(this.pinging) return;
+    this.pinging = true;
+
+    while(true) {
+      const {https, websocket} = await this.pingTransports();
+      if(https || websocket) {
+        this.dispatchEvent('transport', websocket || !https ? 'websocket' : 'https');
+      }
+
+      if(websocket) {
+        break;
+      }
+
+      await pause(10000);
+    }
+
+    this.pinging = false;
+  }
+
+  public setTransportValue(type: TransportType, value: boolean) {
     let length = this.opened.get(type) || 0;
-    
     length += value ? 1 : -1;
     
     this.opened.set(type, length);
+    this.dispatchEvent('change', this.opened);
+  }
+
+  public setTransportOpened(type: TransportType) {
+    return this.setTransportValue(type, true);
+  }
+
+  public setTransportClosed(type: TransportType) {
+    return this.setTransportValue(type, false);
   }
 }
 
-export default new MTTransportController();
\ No newline at end of file
+const transportController = new MTTransportController();
+export default transportController;
diff --git a/src/lib/mtproto/transports/http.ts b/src/lib/mtproto/transports/http.ts
index a692e85e..b6e6802f 100644
--- a/src/lib/mtproto/transports/http.ts
+++ b/src/lib/mtproto/transports/http.ts
@@ -6,9 +6,14 @@
 
 import { pause } from '../../../helpers/schedulers/pause';
 import { DcId } from '../../../types';
-import { logger } from '../../logger';
+import { logger, LogTypes } from '../../logger';
 import type MTPNetworker from '../networker';
 import MTTransport from './transport';
+import Modes from '../../../config/modes';
+
+/// #if MTPROTO_AUTO
+import transportController from './controller';
+/// #endif
 
 export default class HTTP implements MTTransport {
   public networker: MTPNetworker;
@@ -20,14 +25,28 @@ export default class HTTP implements MTTransport {
     body: Uint8Array
   }> = [];
   private releasing: boolean;
+
+  public connected: boolean;
+  private destroyed: boolean;
+  private debug: boolean;
   
   constructor(protected dcId: DcId, protected url: string, logSuffix: string) {
-    this.log = logger(`HTTP-${dcId}` + logSuffix);
+    this.debug = Modes.debug && false;
+
+    let logTypes = LogTypes.Error | LogTypes.Log;
+    if(this.debug) logTypes |= LogTypes.Debug;
+    
+    this.log = logger(`HTTP-${dcId}` + logSuffix, logTypes);
+    this.log('constructor');
+
+    this.connected = false;
   }
 
-  private _send(body: Uint8Array) {
-    return fetch(this.url, {method: 'POST', body}).then(response => {
-      if(response.status !== 200) {
+  public _send(body: Uint8Array, mode?: RequestMode) {
+    this.debug && this.log.debug('-> body length to send:', body.length);
+
+    return fetch(this.url, {method: 'POST', body, mode}).then(response => {
+      if(response.status !== 200 && !mode) {
         response.arrayBuffer().then(buffer => {
           this.log.error('not 200', 
             new TextDecoder("utf-8").decode(new Uint8Array(buffer)));
@@ -36,6 +55,8 @@ export default class HTTP implements MTTransport {
         throw response;
       }
 
+      this.setConnected(true);
+
       // * test resending by dropping random request
       // if(Math.random() > .5) {
       //   throw 'asd';
@@ -44,9 +65,31 @@ export default class HTTP implements MTTransport {
       return response.arrayBuffer().then(buffer => {
         return new Uint8Array(buffer);
       }); 
+    }, (err) => {
+      this.setConnected(false);
+      throw err;
     });
   }
 
+  private setConnected(connected: boolean) {
+    if(this.connected === connected || this.destroyed) {
+      return;
+    }
+
+    this.connected = connected;
+
+    /// #if MTPROTO_AUTO
+    transportController.setTransportValue('https', connected);
+    /// #endif
+  }
+
+  public destroy() {
+    this.setConnected(false);
+    this.destroyed = true;
+    this.pending.forEach(pending => pending.reject());
+    this.pending.length = 0;
+  }
+
   public send(body: Uint8Array) {
     if(this.networker) {
       return this._send(body);
diff --git a/src/lib/mtproto/transports/tcpObfuscated.ts b/src/lib/mtproto/transports/tcpObfuscated.ts
index 793f9380..6509c13d 100644
--- a/src/lib/mtproto/transports/tcpObfuscated.ts
+++ b/src/lib/mtproto/transports/tcpObfuscated.ts
@@ -12,6 +12,10 @@ import MTTransport, { MTConnection, MTConnectionConstructable } from "./transpor
 import intermediatePacketCodec from './intermediate';
 import { ConnectionStatus } from "../connectionStatus";
 
+/// #if MTPROTO_AUTO
+import transportController from "./controller";
+/// #endif
+
 export default class TcpObfuscated implements MTTransport {
   private codec = intermediatePacketCodec;
   private obfuscation = new Obfuscation();
@@ -29,7 +33,7 @@ export default class TcpObfuscated implements MTTransport {
   private log: ReturnType<typeof logger>;
   public connected = false;
   private lastCloseTime: number;
-  private connection: MTConnection;
+  public connection: MTConnection;
 
   private autoReconnect = true;
   private reconnectTimeout: number;
@@ -53,6 +57,10 @@ export default class TcpObfuscated implements MTTransport {
   private onOpen = () => {
     this.connected = true;
 
+    /// #if MTPROTO_AUTO
+    transportController.setTransportOpened('websocket');
+    /// #endif
+
     const initPayload = this.obfuscation.init(this.codec);
 
     this.connection.send(initPayload);
@@ -136,6 +144,12 @@ export default class TcpObfuscated implements MTTransport {
   };
 
   public clear() {
+    /// #if MTPROTO_AUTO
+    if(this.connected) {
+      transportController.setTransportClosed('websocket');
+    }
+    /// #endif
+
     this.connected = false;
 
     if(this.connection) {
@@ -183,6 +197,13 @@ export default class TcpObfuscated implements MTTransport {
   public destroy() {
     this.setAutoReconnect(false);
     this.close();
+
+    this.pending.forEach(pending => {
+      if(pending.reject) {
+        pending.reject();
+      }
+    });
+    this.pending.length = 0;
   }
 
   public close() {
diff --git a/src/lib/mtproto/transports/transport.ts b/src/lib/mtproto/transports/transport.ts
index e22b5abe..faf2bf13 100644
--- a/src/lib/mtproto/transports/transport.ts
+++ b/src/lib/mtproto/transports/transport.ts
@@ -10,6 +10,8 @@ import type MTPNetworker from "../networker";
 export default interface MTTransport {
   networker: MTPNetworker;
   send: (data: Uint8Array) => void;
+  connected: boolean;
+  destroy: () => void;
 }
 
 export interface MTConnection extends EventListenerBase<{
@@ -17,7 +19,7 @@ export interface MTConnection extends EventListenerBase<{
   message: (buffer: ArrayBuffer) => any,
   close: () => void,
 }> {
-  send: (data: Uint8Array) => void;
+  send: MTTransport['send'];
   close: () => void;
 }
 
diff --git a/src/lib/mtproto/transports/websocket.ts b/src/lib/mtproto/transports/websocket.ts
index c0880570..c1236f18 100644
--- a/src/lib/mtproto/transports/websocket.ts
+++ b/src/lib/mtproto/transports/websocket.ts
@@ -9,6 +9,9 @@ import Modes from '../../../config/modes';
 import EventListenerBase from '../../../helpers/eventListenerBase';
 import { MTConnection } from './transport';
 
+// let closeSocketBefore = Date.now() + 30e3;
+// let closeSocketAfter = Date.now() + 10e3;
+
 export default class Socket extends EventListenerBase<{
   open: () => void,
   message: (buffer: ArrayBuffer) => any,
@@ -49,6 +52,11 @@ export default class Socket extends EventListenerBase<{
     this.ws.addEventListener('close', this.handleClose);
     this.ws.addEventListener('error', this.handleError);
     this.ws.addEventListener('message', this.handleMessage);
+
+    // if(Date.now() < closeSocketBefore) {
+    // if(Date.now() >= closeSocketAfter) {
+    //   this.ws.close();
+    // }
   }
 
   public close() {
diff --git a/webpack.common.js b/webpack.common.js
index 2b94baf9..4aae7ee6 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -17,11 +17,17 @@ if(devMode) {
   console.log('DEVMODE IS ON!');
 }
 
+const MTPROTO_HTTP = false;
+const MTPROTO_AUTO = true;
+
 const opts = {
   MTPROTO_WORKER: true,
   MTPROTO_SW: false,
-  MTPROTO_HTTP: false,
+  MTPROTO_HTTP: MTPROTO_HTTP,
   MTPROTO_HTTP_UPLOAD: false,
+  MTPROTO_AUTO: MTPROTO_AUTO,       // use HTTPS when WS is unavailable
+  MTPROTO_HAS_HTTP: MTPROTO_AUTO,
+  MTPROTO_HAS_WS: MTPROTO_AUTO || !MTPROTO_HTTP,
   DEBUG: devMode,
   version: 3,
   'ifdef-verbose': devMode,         // add this for verbose output