diff --git a/src/lib/appManagers/appMessagesManager.ts b/src/lib/appManagers/appMessagesManager.ts
index c40f94f2..727ed443 100644
--- a/src/lib/appManagers/appMessagesManager.ts
+++ b/src/lib/appManagers/appMessagesManager.ts
@@ -183,7 +183,7 @@ export class AppMessagesManager {
 
   public loadSavedState() {
     if(this.loaded) return this.loaded;
-    this.loaded = new Promise((resolve, reject) => {
+    return this.loaded = new Promise((resolve, reject) => {
       AppStorage.get<{
         dialogs: Dialog[],
         allDialogsLoaded: AppMessagesManager['allDialogsLoaded'], 
diff --git a/src/lib/mtproto/apiFileManager.ts b/src/lib/mtproto/apiFileManager.ts
index 5309ec91..aba3d67d 100644
--- a/src/lib/mtproto/apiFileManager.ts
+++ b/src/lib/mtproto/apiFileManager.ts
@@ -29,22 +29,22 @@ export class ApiFileManager {
         resolve: (...args: any[]) => void,
         reject: (...args: any[]) => void
       },
-      activeDelta?: number
+      activeDelta: number
     }>
   } = {};
   public downloadActives: {[dcID: string]: number} = {};
 
   private log: ReturnType<typeof logger> = logger('AFM');
 
-  public downloadRequest(dcID: string | number, cb: () => Promise<unknown>, activeDelta?: number) {
+  public downloadRequest(dcID: string | number, cb: () => Promise<unknown>, activeDelta: number) {
     if(this.downloadPulls[dcID] === undefined) {
       this.downloadPulls[dcID] = [];
       this.downloadActives[dcID] = 0;
     }
 
-    var downloadPull = this.downloadPulls[dcID];
+    const downloadPull = this.downloadPulls[dcID];
 
-    let promise = new Promise((resolve, reject) => {
+    const promise = new Promise((resolve, reject) => {
       downloadPull.push({cb: cb, deferred: {resolve, reject}, activeDelta: activeDelta});
     })/* .catch(() => {}) */;
 
@@ -56,15 +56,16 @@ export class ApiFileManager {
   }
 
   public downloadCheck(dcID: string | number) {
-    var downloadPull = this.downloadPulls[dcID];
-    var downloadLimit = dcID == 'upload' ? 11 : 5;
+    const downloadPull = this.downloadPulls[dcID];
+    //const downloadLimit = dcID == 'upload' ? 11 : 5;
+    const downloadLimit = 24;
 
     if(this.downloadActives[dcID] >= downloadLimit || !downloadPull || !downloadPull.length) {
       return false;
     }
 
-    var data = downloadPull.shift();
-    var activeDelta = data.activeDelta || 1;
+    const data = downloadPull.shift();
+    const activeDelta = data.activeDelta || 1;
 
     this.downloadActives[dcID] += activeDelta;
 
@@ -122,8 +123,8 @@ export class ApiFileManager {
   }
 
   public getTempFileName(file: any) {
-    var size = file.size || -1;
-    var random = nextRandomInt(0xFFFFFFFF);
+    const size = file.size || -1;
+    const random = nextRandomInt(0xFFFFFFFF);
     return '_temp' + random + '_' + size;
   }
 
@@ -131,12 +132,12 @@ export class ApiFileManager {
     if(!location) {
       return false;
     }
-    var fileName = this.getFileName(location);
+    const fileName = this.getFileName(location);
 
     return this.cachedDownloads[fileName] || false;
   }
 
-  public getFileStorage(): typeof cacheStorage {
+  public getFileStorage() {
     return cacheStorage;
   }
 
@@ -419,7 +420,7 @@ export class ApiFileManager {
                 fileDownload: true/* ,
                 singleInRequest: 'safari' in window */
               });
-            }, dcID).then((result: any) => {
+            }, 2).then((result: any) => {
               writeFilePromise.then(() => {
                 if(canceled) {
                   return Promise.resolve();
diff --git a/src/lib/mtproto/apiManager.ts b/src/lib/mtproto/apiManager.ts
index 2db4525b..69f39aea 100644
--- a/src/lib/mtproto/apiManager.ts
+++ b/src/lib/mtproto/apiManager.ts
@@ -13,6 +13,7 @@ import passwordManager from './passwordManager';
 
 /// #if !MTPROTO_WORKER
 import { $rootScope } from '../utils';
+import { InvokeApiOptions } from '../../types';
 /// #endif
 
 //console.error('apiManager included!');
@@ -133,10 +134,10 @@ export class ApiManager {
   }
   
   // mtpGetNetworker
-  public async getNetworker(dcID: number, options: any = {}): Promise<MTPNetworker> {
-    let upload = (options.fileUpload || options.fileDownload) 
+  public async getNetworker(dcID: number, options: InvokeApiOptions): Promise<MTPNetworker> {
+    const upload = (options.fileUpload || options.fileDownload) 
       && (dcConfigurator.chooseServer(dcID, true) instanceof HTTP || Modes.multipleConnections);
-    let cache = upload ? this.cachedUploadNetworkers : this.cachedNetworkers;
+    const cache = upload ? this.cachedUploadNetworkers : this.cachedNetworkers;
     
     if(!dcID) {
       throw new Error('get Networker without dcID');
@@ -146,72 +147,61 @@ export class ApiManager {
       return cache[dcID];
     }
     
-    let getKey = dcID + '-' + +upload;
+    const getKey = dcID + '-' + +upload;
     if(this.gettingNetworkers[getKey]) {
       return this.gettingNetworkers[getKey];
     }
+
+    const ak = 'dc' + dcID + '_auth_key';
+    const akID = 'dc' + dcID + '_auth_keyID';
+    const ss = 'dc' + dcID + '_server_salt';
     
-    return this.gettingNetworkers[getKey] = new Promise(async(resolve, reject) => {
-      var ak = 'dc' + dcID + '_auth_key';
-      var akID = 'dc' + dcID + '_auth_keyID';
-      var ss = 'dc' + dcID + '_server_salt';
-      
-      let result = await AppStorage.get<string[]/* |boolean[] */>([ak, akID, ss]);
-      
-      let [authKeyHex, authKeyIDHex, serverSaltHex] = result;
-      if(authKeyHex && !authKeyIDHex && serverSaltHex) {
+    return this.gettingNetworkers[getKey] = AppStorage.get<string[]/* |boolean[] */>([ak, akID, ss])
+    .then(async([authKeyHex, authKeyIDHex, serverSaltHex]) => {
+      /* if(authKeyHex && !authKeyIDHex && serverSaltHex) {
         this.log.warn('Updating to new version (+akID)');
         await AppStorage.remove(ak, akID, ss);
         authKeyHex = serverSaltHex = '';
-      }
+      } */
       
+      let networker: MTPNetworker;
       if(authKeyHex && authKeyHex.length == 512) {
         if(!serverSaltHex || serverSaltHex.length != 16) {
           serverSaltHex = 'AAAAAAAAAAAAAAAA';
         }
         
-        var authKey = bytesFromHex(authKeyHex);
-        var authKeyID = new Uint8Array(bytesFromHex(authKeyIDHex));
-        var serverSalt = bytesFromHex(serverSaltHex);
-        
-        resolve(cache[dcID] = networkerFactory.getNetworker(dcID, authKey, authKeyID, serverSalt, options));
-      } else try {
-        let auth = await authorizer.auth(dcID);
-        
-        let storeObj = {
-          [ak]: bytesToHex(auth.authKey),
-          [akID]: auth.authKeyID.hex,
-          [ss]: bytesToHex(auth.serverSalt)
-        };
-        
-        AppStorage.set(storeObj);
+        const authKey = bytesFromHex(authKeyHex);
+        const authKeyID = new Uint8Array(bytesFromHex(authKeyIDHex));
+        const serverSalt = bytesFromHex(serverSaltHex);
         
-        resolve(cache[dcID] = networkerFactory.getNetworker(dcID, auth.authKey, auth.authKeyID, auth.serverSalt, options));
-      } catch(error) {
-        this.log('Get networker error', error, error.stack);
-        reject(error);
+        networker = networkerFactory.getNetworker(dcID, authKey, authKeyID, serverSalt, options);
+      } else {
+        try { // if no saved state
+          const auth = await authorizer.auth(dcID);
+  
+          const storeObj = {
+            [ak]: bytesToHex(auth.authKey),
+            [akID]: auth.authKeyID.hex,
+            [ss]: bytesToHex(auth.serverSalt)
+          };
+          
+          AppStorage.set(storeObj);
+          
+          networker = networkerFactory.getNetworker(dcID, auth.authKey, auth.authKeyID, auth.serverSalt, options);
+        } catch(error) {
+          this.log('Get networker error', error, error.stack);
+          delete this.gettingNetworkers[getKey];
+          throw error;
+        }
       }
 
       delete this.gettingNetworkers[getKey];
+      return cache[dcID] = networker;
     });
   }
   
   // mtpInvokeApi
-  public invokeApi(method: string, params: any = {}, options: Partial<{
-    dcID: number,
-    timeout: number,
-    noErrorBox: boolean,
-    fileUpload: boolean,
-    ignoreErrors: boolean,
-    fileDownload: boolean,
-    createNetworker: boolean,
-    singleInRequest: boolean,
-    startMaxLength: number,
-    
-    waitTime: number,
-    stopTime: number,
-    rawError: any
-  }> = {}) {
+  public invokeApi(method: string, params: any = {}, options: InvokeApiOptions = {}) {
     ///////this.log('Invoke api', method, params, options);
     
     return new Promise((resolve, reject) => {
@@ -343,7 +333,6 @@ export class ApiManager {
   public checkPassword(value: string): Promise<any> {
     return passwordManager.getState()
     .then(state => {
-      console.log(state);
       return passwordManager.check(state, value);
     });
   }
diff --git a/src/lib/mtproto/dcConfigurator.ts b/src/lib/mtproto/dcConfigurator.ts
index 919792a4..9ff8077a 100644
--- a/src/lib/mtproto/dcConfigurator.ts
+++ b/src/lib/mtproto/dcConfigurator.ts
@@ -3,19 +3,11 @@ import MTTransport from './transports/transport';
 import HTTP from './transports/http';
 import { Modes } from './mtproto_config';
 
+type TransportTypes = 'websocket' | 'https' | 'http';
 type Servers = {
-  [transport: string]: {
-    [dcID: number]: MTTransport
+  [transportType in TransportTypes]: {
+    [dcID: number]: MTTransport[]
   }
-  /* websocket: {
-    [dcID: number]: Socket
-  },
-  https: {
-    [dcID: number]: HTTPTransport
-  },
-  http: {
-    [dcID: number]: HTTPTransport
-  } */
 };
 
 export class DcConfigurator {
@@ -47,41 +39,50 @@ export class DcConfigurator {
     http: {}
   };
 
-  public chooseServer(dcID: number, upload?: boolean, transport = 'websocket') {
-    let servers = upload && (transport != 'websocket' || Modes.multipleConnections) 
-      ? this.chosenUploadServers[transport] 
-      : this.chosenServers[transport];
+  public chooseServer(dcID: number, upload?: boolean, transportType: TransportTypes = 'websocket') {
+    const servers = upload && (transportType != 'websocket' || Modes.multipleConnections) 
+      ? this.chosenUploadServers[transportType] 
+      : this.chosenServers[transportType];
 
     if(!(dcID in servers)) {
-      let chosenServer = '';
+      servers[dcID] = [];
+    }
 
-      if(transport == 'websocket') {
-        let subdomain = this.sslSubdomains[dcID - 1];
-        let path = Modes.test ? 'apiws_test' : 'apiws';
-        chosenServer = 'wss://' + subdomain + '.web.telegram.org/' + path;
-        return servers[dcID] = new Socket(dcID, chosenServer);
-      }
-  
-      if(Modes.ssl || !Modes.http || transport == 'https') {
-        let subdomain = this.sslSubdomains[dcID - 1] + (upload ? '-1' : '');
-        let path = Modes.test ? 'apiw_test1' : 'apiw1';
-        chosenServer = 'https://' + subdomain + '.web.telegram.org/' + path;
-        return servers[dcID] = new HTTP(dcID, chosenServer);
+    const transports = servers[dcID];
+
+    if(!transports.length || (upload && transports.length < 1)) {
+      let transport: MTTransport;
+
+      if(transportType == 'websocket') {
+        const subdomain = this.sslSubdomains[dcID - 1];
+        const path = Modes.test ? 'apiws_test' : 'apiws';
+        const chosenServer = 'wss://' + subdomain + '.web.telegram.org/' + path;
+        transport = new Socket(dcID, chosenServer);
+      } else if(Modes.ssl || !Modes.http || transportType == 'https') {
+        const subdomain = this.sslSubdomains[dcID - 1] + (upload ? '-1' : '');
+        const path = Modes.test ? 'apiw_test1' : 'apiw1';
+        const chosenServer = 'https://' + subdomain + '.web.telegram.org/' + path;
+        transport = new HTTP(dcID, chosenServer);
+      } else {
+        for(let dcOption of this.dcOptions) {
+          if(dcOption.id == dcID) {
+            const chosenServer = 'http://' + dcOption.host + (dcOption.port != 80 ? ':' + dcOption.port : '') + '/apiw1';
+            transport = new HTTP(dcID, chosenServer);
+            break;
+          }
+        }
       }
   
-      for(let dcOption of this.dcOptions) {
-        if(dcOption.id == dcID) {
-          chosenServer = 'http://' + dcOption.host + (dcOption.port != 80 ? ':' + dcOption.port : '') + '/apiw1';
-          return servers[dcID] = new HTTP(dcID, chosenServer);
-        }
+      if(!transport) {
+        console.error('No chosenServer!', dcID);
+        return null;
       }
-
-      console.error('No chosenServer!', dcID);
-
-      return null;
+      
+      transports.push(transport);
+      return transport;
     }
   
-    return servers[dcID];
+    return transports[0];
   }
 }
 
diff --git a/src/lib/mtproto/networker.ts b/src/lib/mtproto/networker.ts
index 65362be6..39afbf69 100644
--- a/src/lib/mtproto/networker.ts
+++ b/src/lib/mtproto/networker.ts
@@ -14,6 +14,7 @@ import Socket from './transports/websocket';
 import HTTP from './transports/http';
 import { logger } from '../polyfill';
 import { Modes, App } from './mtproto_config';
+import { InvokeApiOptions } from '../../types';
 
 //console.error('networker included!', new Error().stack);
 
@@ -90,14 +91,12 @@ class MTPNetworker {
   private log: ReturnType<typeof logger>;
 
   constructor(private dcID: number, private authKey: number[], private authKeyID: Uint8Array,
-    private serverSalt: number[], private options: any = {}) {
+    private serverSalt: number[], private options: InvokeApiOptions = {}) {
     this.authKeyUint8 = convertToUint8Array(this.authKey);
     //this.authKeyID = sha1BytesSync(this.authKey).slice(-8);
 
     this.upload = this.options.fileUpload || this.options.fileDownload || false;
-
     this.log = logger('NET-' + dcID + (this.upload ? '-U' : ''));
-
     this.log('constructor'/* , this.authKey, this.authKeyID, this.serverSalt */);
 
     this.updateSession();
@@ -111,7 +110,7 @@ class MTPNetworker {
     this.transport = dcConfigurator.chooseServer(this.dcID, this.upload);
 
     if(this.transport instanceof HTTP) {
-      /* this.longPollInt =  */window.setInterval(this.checkLongPoll.bind(this), 10000);
+      /* this.longPollInt =  */setInterval(this.checkLongPoll.bind(this), 10000);
       this.checkLongPoll();
     } else {
       (this.transport as Socket).networker = this;
@@ -204,24 +203,7 @@ class MTPNetworker {
     return this.pushMessage(message, options);
   }
 
-  public wrapApiCall(method: string, params: any = {}, options: {
-    dcID?: number,
-    timeout?: number,
-    noErrorBox?: boolean,
-    fileUpload?: boolean,
-    ignoreErrors?: boolean,
-    fileDownload?: boolean,
-    createNetworker?: boolean,
-    singleInRequest?: boolean,
-    startMaxLength?: number,
-
-    afterMessageID?: string,
-    resultType?: boolean,
-    
-    waitTime?: number,
-    stopTime?: number,
-    rawError?: any
-  } = {}) {
+  public wrapApiCall(method: string, params: any = {}, options: InvokeApiOptions = {}) {
     let serializer = new TLSerialization(options);
   
     if(!this.connectionInited) { // this will call once for each new session
@@ -293,7 +275,7 @@ class MTPNetworker {
   }
 
   public checkLongPoll() {
-    var isClean = this.cleanupSent();
+    const isClean = this.cleanupSent();
     //this.log('Check lp', this.longPollPending, tsNow(), this.dcID, isClean, this);
     if((this.longPollPending && Date.now() < this.longPollPending) ||
       this.offline) {
@@ -301,18 +283,17 @@ class MTPNetworker {
       return false;
     }
 
-    var self = this;
     AppStorage.get<number>('dc').then((baseDcID: number) => {
       if(isClean && (
-          baseDcID != self.dcID ||
-          self.upload ||
-          (self.sleepAfter && Date.now() > self.sleepAfter)
+          baseDcID != this.dcID ||
+          this.upload ||
+          (this.sleepAfter && Date.now() > this.sleepAfter)
         )) {
-        //console.warn(dT(), 'Send long-poll for DC is delayed', self.dcID, self.sleepAfter);
+        //console.warn(dT(), 'Send long-poll for DC is delayed', this.dcID, this.sleepAfter);
         return;
       }
 
-      self.sendLongPoll();
+      this.sendLongPoll();
     });
   }
 
@@ -963,7 +944,7 @@ class MTPNetworker {
     clearTimeout(this.nextReqTimeout);
     this.nextReqTimeout = 0;
     if(delay > 0) {
-      this.nextReqTimeout = window.setTimeout(this.performScheduledRequest.bind(this), delay || 0);
+      this.nextReqTimeout = setTimeout(this.performScheduledRequest.bind(this), delay || 0);
     } else {
       setTimeout(this.performScheduledRequest.bind(this), 0);
     }
@@ -984,26 +965,25 @@ class MTPNetworker {
   }
 
   public cleanupSent() {
-    var self = this;
-    var notEmpty = false;
+    let notEmpty = false;
     // this.log('clean start', this.dcID/*, this.sentMessages*/)
     Object.keys(this.sentMessages).forEach((msgID) => {
-      let message = this.sentMessages[msgID];
+      const message = this.sentMessages[msgID];
     
       // this.log('clean iter', msgID, message)
-      if(message.notContentRelated && self.pendingMessages[msgID] === undefined) {
+      if(message.notContentRelated && this.pendingMessages[msgID] === undefined) {
         // this.log('clean notContentRelated', msgID)
-        delete self.sentMessages[msgID];
+        delete this.sentMessages[msgID];
       } else if(message.container) {
-        for(var i = 0; i < message.inner.length; i++) {
-          if(self.sentMessages[message.inner[i]] !== undefined) {
-            // this.log('clean failed, found', msgID, message.inner[i], self.sentMessages[message.inner[i]].seq_no)
+        for(let i = 0; i < message.inner.length; i++) {
+          if(this.sentMessages[message.inner[i]] !== undefined) {
+            // this.log('clean failed, found', msgID, message.inner[i], this.sentMessages[message.inner[i]].seq_no)
             notEmpty = true;
             return;
           }
         }
         // this.log('clean container', msgID)
-        delete self.sentMessages[msgID];
+        delete this.sentMessages[msgID];
       } else {
         notEmpty = true;
       }
diff --git a/src/lib/mtproto/networkerFactory.ts b/src/lib/mtproto/networkerFactory.ts
index df16d8ab..6515c44e 100644
--- a/src/lib/mtproto/networkerFactory.ts
+++ b/src/lib/mtproto/networkerFactory.ts
@@ -1,4 +1,5 @@
 import { MTPNetworker } from "./networker";
+import { InvokeApiOptions } from "../../types";
 
 export class NetworkerFactory {
   public updatesProcessor: (obj: any, bool: boolean) => void = null;
@@ -7,8 +8,8 @@ export class NetworkerFactory {
     this.updatesProcessor = callback;
   }
 
-  public getNetworker(dcID: number, authKey: number[], authKeyID: Uint8Array, serverSalt: number[], options: any) {
-    //console.log(dT(), 'NetworkerFactory: creating new instance of MTPNetworker:', dcID, options);
+  public getNetworker(dcID: number, authKey: number[], authKeyID: Uint8Array, serverSalt: number[], options: InvokeApiOptions) {
+    //console.log('NetworkerFactory: creating new instance of MTPNetworker:', dcID, options);
     return new MTPNetworker(dcID, authKey, authKeyID, serverSalt, options);
   }
 }
diff --git a/src/lib/mtproto/passwordManager.ts b/src/lib/mtproto/passwordManager.ts
index 444f7607..31d7f1f1 100644
--- a/src/lib/mtproto/passwordManager.ts
+++ b/src/lib/mtproto/passwordManager.ts
@@ -6,6 +6,8 @@ import {str2bigInt, greater, isZero,
   bigInt2str, powMod, int2bigInt, mult, mod, sub, bitSize, negative, mult, add} from 'leemon/es/index/';
 
 export class PasswordManager {
+  private log = (...args: any[]) => {};
+  
   public getState(options: any = {}) {
     return apiManager.invokeApi('account.getPassword', {}, options).then((result) => {
       return result
@@ -89,19 +91,19 @@ export class PasswordManager {
     let buffer = bufferConcats(client_salt, passwordBuffer, client_salt);
 
     return CryptoWorker.sha256Hash(buffer).then((buffer: any) => {
-      console.log('encoded 1', bytesToHex(new Uint8Array(buffer)));
+      this.log('encoded 1', bytesToHex(new Uint8Array(buffer)));
 
       buffer = bufferConcats(server_salt, buffer, server_salt);
       return CryptoWorker.sha256Hash(buffer).then((buffer: any) => {
 
-        console.log('encoded 2', buffer, bytesToHex(new Uint8Array(buffer)));
+        this.log('encoded 2', buffer, bytesToHex(new Uint8Array(buffer)));
 
         return CryptoWorker.pbkdf2(new Uint8Array(buffer), client_salt, 100000).then((hash: any) => {
-          console.log('encoded 3', hash, bytesToHex(new Uint8Array(hash)));
+          this.log('encoded 3', hash, bytesToHex(new Uint8Array(hash)));
 
           hash = bufferConcats(server_salt, hash, server_salt);
           return CryptoWorker.sha256Hash(hash).then((buffer: any) => {
-            console.log('got password hash:', buffer, bytesToHex(new Uint8Array(buffer)));
+            this.log('got password hash:', buffer, bytesToHex(new Uint8Array(buffer)));
 
             return buffer;
           });
@@ -117,8 +119,8 @@ export class PasswordManager {
     let B = str2bigInt(bytesToHex(state.srp_B), 16);
     let g = int2bigInt(algo.g, 32, 256);
 
-    console.log('p', bigInt2str(p, 16));
-    console.log('B', bigInt2str(B, 16));
+    this.log('p', bigInt2str(p, 16));
+    this.log('B', bigInt2str(B, 16));
 
     /* if(B.compareTo(BigInteger.ZERO) < 0) {
       console.error('srp_B < 0')
@@ -144,7 +146,7 @@ export class PasswordManager {
       new Uint8Array(algo.salt2)) as ArrayBuffer;
     let x = str2bigInt(bytesToHex(new Uint8Array(pw_hash)), 16);
 
-    console.warn('computed pw_hash:', pw_hash, x, bytesToHex(new Uint8Array(pw_hash)));
+    this.log('computed pw_hash:', pw_hash, x, bytesToHex(new Uint8Array(pw_hash)));
 
 
     var padArray = function(arr: any[], len: number, fill = 0) {
@@ -155,25 +157,25 @@ export class PasswordManager {
     let gForHash = padArray(bytesFromHex(bigInt2str(g, 16)), 256); // like uint8array
     let b_for_hash = padArray(bytesFromHex(bigInt2str(B, 16)), 256);
 
-    console.log(bytesToHex(pForHash));
-    console.log(bytesToHex(gForHash));
-    console.log(bytesToHex(b_for_hash));
+    this.log(bytesToHex(pForHash));
+    this.log(bytesToHex(gForHash));
+    this.log(bytesToHex(b_for_hash));
 
     let g_x = powMod(g, x, p);
 
-    console.log('g_x', bigInt2str(g_x, 16));
+    this.log('g_x', bigInt2str(g_x, 16));
 
     let k: any = await CryptoWorker.sha256Hash(bufferConcat(pForHash, gForHash));
     k = str2bigInt(bytesToHex(new Uint8Array(k)), 16);
 
-    console.log('k', bigInt2str(k, 16));
+    this.log('k', bigInt2str(k, 16));
 
     // kg_x = (k * g_x) % p
     let kg_x = mod(mult(k, g_x), p);
 
     // good
 
-    console.log('kg_x', bigInt2str(kg_x, 16));
+    this.log('kg_x', bigInt2str(kg_x, 16));
 
     let is_good_mod_exp_first = (modexp: any, prime: any) => {
       let diff = sub(prime, modexp);
@@ -217,12 +219,12 @@ export class PasswordManager {
 
     let {a, a_for_hash, u} = await generate_and_check_random();
 
-    console.log('a', bigInt2str(a, 16));
-    console.log('a_for_hash', bytesToHex(a_for_hash));
-    console.log('u', bigInt2str(u, 16));
+    this.log('a', bigInt2str(a, 16));
+    this.log('a_for_hash', bytesToHex(a_for_hash));
+    this.log('u', bigInt2str(u, 16));
 
     // g_b = (B - kg_x) % p
-    console.log('B - kg_x', bigInt2str(sub(B, kg_x), 16));
+    this.log('B - kg_x', bigInt2str(sub(B, kg_x), 16));
     //let g_b = mod(sub(B, kg_x), p);
     /* let g_b = sub(B, kg_x);
     if(negative(g_b)) g_b = add(g_b, p);
@@ -231,15 +233,15 @@ export class PasswordManager {
     if(!negative(sub(B, kg_x))) g_b = sub(mod(B, p), kg_x);
     else g_b = mod(sub(B, kg_x), p); */
     /* let lol = trim(sub(B, kg_x), 10);
-    console.log('llalala', bigInt2str(lol, 16)); */
+    this.log('llalala', bigInt2str(lol, 16)); */
     let g_b;
     if(!greater(B, kg_x)) {
-      console.log('negative');
+      this.log('negative');
       g_b = add(B, p);
     } else g_b = B;
     g_b = mod(sub(g_b, kg_x), p);
     //g_b = mod(g_b, p);
-    //console.log('g_b', bigInt2str(g_b, 16));
+    //this.log('g_b', bigInt2str(g_b, 16));
 
     /* if(!is_good_mod_exp_first(g_b, p))
       throw new Error('bad g_b'); */
@@ -277,7 +279,7 @@ export class PasswordManager {
     };
 
 
-    console.log('out', bytesToHex(out.A), bytesToHex(out.M1));
+    this.log('out', bytesToHex(out.A), bytesToHex(out.M1));
     return out;
     
     /* console.log(gForHash, pForHash, bForHash); */
diff --git a/src/types.d.ts b/src/types.d.ts
index 39fd45e5..2c7880af 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -42,4 +42,23 @@ export type MTPhotoSize = {
   type?: string, // i, m, x, y, w by asc
   location?: any,
   bytes?: Uint8Array // if type == 'i'
-};
\ No newline at end of file
+};
+
+export type InvokeApiOptions = Partial<{
+  dcID: number,
+  timeout: number,
+  noErrorBox: boolean,
+  fileUpload: boolean,
+  ignoreErrors: boolean,
+  fileDownload: boolean,
+  createNetworker: boolean,
+  singleInRequest: boolean,
+  startMaxLength: number,
+
+  afterMessageID: string,
+  resultType: boolean,
+  
+  waitTime: number,
+  stopTime: number,
+  rawError: any
+}>;
\ No newline at end of file