diff --git a/client/client.js b/client/client.js
index 254780d0..f151c803 100644
--- a/client/client.js
+++ b/client/client.js
@@ -372,7 +372,10 @@ function CloudCmdProto(DOM) {
                 order,
             });
             
-            const newObj = await RESTful.read(path + query, 'json');
+            const [, newObj] = await RESTful.read(path + query, 'json');
+            
+            if (!newObj)
+                return;
             
             /* eslint require-atomic-updates:0 */
             options.sort = sort;
diff --git a/client/dom/files.js b/client/dom/files.js
index dea2695f..c64f2a47 100644
--- a/client/dom/files.js
+++ b/client/dom/files.js
@@ -104,7 +104,7 @@ const getSystemFile = promisify((file, callback) => {
     });
 });
 
-const getConfig = promisify((callback) => {
+const getConfig = async () => {
     let is;
     
     if (!Promises.config)
@@ -113,20 +113,18 @@ const getConfig = promisify((callback) => {
             return RESTful.Config.read();
         };
     
-    Promises.config().then((data) => {
+    const [, data] = await Promises.config();
+    
+    if (data)
         is = false;
-        
-        callback(null, data);
-        
-        timeout(() => {
-            if (!is)
-                Promises.config = null;
-        });
-    }, () => {
+    
+    timeout(() => {
         if (!is)
             Promises.config = null;
     });
-});
+    
+    return data;
+};
 
 function getTimeoutOnce(time) {
     let is;
diff --git a/client/dom/index.js b/client/dom/index.js
index e731c893..6c276866 100644
--- a/client/dom/index.js
+++ b/client/dom/index.js
@@ -99,13 +99,13 @@ function CmdProto() {
         
         const name = getName();
         
-        const [cancel, newName] = await Dialog.prompt(msg, name);
+        const [cancel, currentName] = await Dialog.prompt(msg, name);
         
         if (cancel)
             return;
         
         const path = (type) => {
-            const result = dir + newName;
+            const result = dir + currentName;
             
             if (!type)
                 return result;
@@ -115,7 +115,7 @@ function CmdProto() {
         
         await RESTful.write(path(type));
         await CloudCmd.refresh({
-            currentName: newName,
+            currentName,
         });
     }
     
@@ -240,7 +240,7 @@ function CmdProto() {
         if (name === '..')
             return;
         
-        const size = await RESTful.read(link + query);
+        const [, size] = await RESTful.read(link + query);
         
         DOM.setCurrentSize(size, current);
         Images.hide();
@@ -355,19 +355,6 @@ function CmdProto() {
         });
     };
     
-    /**
-     * unified way to save current file content
-     *
-     * @callback - function({data, name}) {}
-     * @currentFile
-     */
-    this.saveCurrentData = (url, data, callback, query = '') => {
-        RESTful.write(url + query, data)
-            .then(() => {
-                DOM.saveDataToStorage(url, data);
-            });
-    };
-    
     /**
      * unified way to get RefreshButton
      */
@@ -768,7 +755,10 @@ function CmdProto() {
             to : dirPath + to,
         };
         
-        await RESTful.mv(files);
+        const [e] = await RESTful.mv(files);
+        
+        if (e)
+            return;
         
         DOM.setCurrentName(to, current);
         Storage.remove(dirPath);
@@ -869,7 +859,7 @@ function CmdProto() {
             return;
         
         CloudCmd.loadDir({
-            path
+            path,
         });
     },
     
diff --git a/client/dom/rest.js b/client/dom/rest.js
index e6c84b7b..9b36e27a 100644
--- a/client/dom/rest.js
+++ b/client/dom/rest.js
@@ -3,7 +3,7 @@
 /* global CloudCmd, DOM */
 
 const itype = require('itype/legacy');
-const {promisify} = require('es6-promisify');
+const promisify = require('../../common/try-to-promisify');
 
 const {FS} = require('../../common/cloudfunc');
 const {encode} = require('../../common/entity');
diff --git a/client/modules/config/index.js b/client/modules/config/index.js
index 4ca85b03..d85d2942 100644
--- a/client/modules/config/index.js
+++ b/client/modules/config/index.js
@@ -190,7 +190,7 @@ function hide() {
     CloudCmd.View.hide();
 }
 
-function onChange(el) {
+async function onChange(el) {
     const obj = {};
     const name = input.getName(el);
     const data = input.getValue(name, Element);
@@ -202,7 +202,7 @@ function onChange(el) {
     
     obj[name] = data;
     
-    Config.save(obj);
+    await Config.save(obj);
 }
 
 function onSave(obj) {
@@ -214,12 +214,14 @@ function onSave(obj) {
     });
 }
 
-function saveHttp(obj) {
+async function saveHttp(obj) {
     const {RESTful} = DOM;
+    const [e] = await RESTful.Config.write(obj);
     
-    RESTful.Config.write(obj).then(() => {
-        onSave(obj);
-    });
+    if (e)
+        return;
+    
+    onSave(obj);
 }
 
 function onAuthChange(checked) {
diff --git a/client/modules/menu.js b/client/modules/menu.js
index 6380ff66..502d4100 100644
--- a/client/modules/menu.js
+++ b/client/modules/menu.js
@@ -244,8 +244,11 @@ function uploadFromCloud() {
     
     CloudCmd.execFromModule('Cloud', 'saveFile', async (currentName, data) => {
         const path = DOM.getCurrentDirPath() + currentName;
+        const [e] = await RESTful.write(path, data);
+        
+        if (e)
+            return;
         
-        await RESTful.write(path, data);
         await CloudCmd.refresh({currentName});
     });
 }
diff --git a/client/modules/user-menu/default-menu.js b/client/modules/user-menu/default-menu.js
index 8504fded..fb75a834 100644
--- a/client/modules/user-menu/default-menu.js
+++ b/client/modules/user-menu/default-menu.js
@@ -14,7 +14,7 @@ module.exports = {
         await DOM.renameCurrent();
     },
     
-    'C - Create User Menu File': async ({DOM, CloudCmd, tryToCatch}) => {
+    'C - Create User Menu File': async ({DOM, CloudCmd}) => {
         const {
             RESTful,
             CurrentInfo,
@@ -23,7 +23,7 @@ module.exports = {
         const {dirPath} = CurrentInfo;
         const path = `${dirPath}.cloudcmd.menu.js`;
         
-        const [e] = await tryToCatch(RESTful.write, path, data);
+        const [e] = await RESTful.write(path, data);
         
         if (e)
             return;
diff --git a/client/modules/user-menu/default-menu.spec.js b/client/modules/user-menu/default-menu.spec.js
index 731ab5f0..78514a2b 100644
--- a/client/modules/user-menu/default-menu.spec.js
+++ b/client/modules/user-menu/default-menu.spec.js
@@ -4,7 +4,6 @@ const test = require('supertape');
 const stub = require('@cloudcmd/stub');
 const wraptile = require('wraptile');
 const defaultMenu = require('./default-menu');
-const tryToCatch = require('try-to-catch');
 const {_data} = defaultMenu;
 const reject = wraptile(async (a) => {
     throw Error(a);
@@ -19,7 +18,6 @@ test('cloudcmd: client: user menu: RESTful.write', async (t) => {
     await defaultMenu[name]({
         DOM,
         CloudCmd,
-        tryToCatch,
     });
     
     const path = '/.cloudcmd.menu.js';
@@ -36,7 +34,6 @@ test('cloudcmd: client: user menu: refresh', async (t) => {
     await defaultMenu[name]({
         DOM,
         CloudCmd,
-        tryToCatch,
     });
     
     t.ok(refresh.calledWith(), 'should call CloudCmd.refresh');
@@ -52,7 +49,6 @@ test('cloudcmd: client: user menu: setCurrentByName', async (t) => {
     await defaultMenu[name]({
         DOM,
         CloudCmd,
-        tryToCatch,
     });
     
     const fileName = '.cloudcmd.menu.js';
@@ -69,7 +65,6 @@ test('cloudcmd: client: user menu: EditFile.show', async (t) => {
     await defaultMenu[name]({
         DOM,
         CloudCmd,
-        tryToCatch,
     });
     
     t.ok(EditFile.show.called, 'should call EditFile.show');
@@ -88,7 +83,6 @@ test('cloudcmd: client: user menu: no EditFile.show', async (t) => {
     await defaultMenu[name]({
         DOM,
         CloudCmd,
-        tryToCatch,
     });
     
     t.notOk(EditFile.show.called, 'should not call EditFile.show');
diff --git a/client/modules/user-menu/index.js b/client/modules/user-menu/index.js
index d76733b5..02d734e1 100644
--- a/client/modules/user-menu/index.js
+++ b/client/modules/user-menu/index.js
@@ -122,7 +122,6 @@ const runUserMenu = async (value, options, userMenu) => {
     const [e] = await tryToCatch(userMenu[value], {
         DOM,
         CloudCmd,
-        tryToCatch,
     });
     
     if (e)
diff --git a/common/try-to-promisify.js b/common/try-to-promisify.js
index ab4860d2..0bb49b88 100644
--- a/common/try-to-promisify.js
+++ b/common/try-to-promisify.js
@@ -1,11 +1,11 @@
 'use strict';
 
 const {promisify} = require('es6-promisify');
+const wraptile = require('wraptile/legacy');
 const tryToCatch = require('try-to-catch/legacy');
 
-module.exports = (fn, ...args) => {
+module.exports = wraptile((fn, ...args) => {
     const promise = promisify(fn);
-    
     return tryToCatch(promise, ...args);
-};
+});