diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..3da0c00
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,25 @@
+/**
+ * Created by user on 2018/4/13/013.
+ */
+
+declare namespace DeAsync
+{
+	export interface IApi
+	{
+		<T>(fn: (argv, done: <U extends Error>(err: U, value: T) => never) => T, ...argv): T,
+		<T>(fn: (done: <U extends Error>(err: U, value: T) => never) => T, ...argv): T,
+		<T>(fn: (...argv) => T, ...argv): T,
+
+		sleep(timeout: number): never,
+		runLoopOnce(): never,
+		loopWhile(pred: (...argv) => boolean): never,
+		await<T>(pr: Promise<T>): T
+
+		default: IApi,
+	}
+}
+
+declare const DeAsync: DeAsync.IApi;
+export = DeAsync;
+
+export as namespace DeAsync;
diff --git a/index.js b/index.js
index 28acb68..a2f8946 100644
--- a/index.js
+++ b/index.js
@@ -5,17 +5,17 @@
  * Copyright 2014-2015 Abbr
  * Released under the MIT license
  */
- 
+
 (function () {
-		
+
 	var fs = require('fs'),
 		path = require('path'),
 		binding;
-	
+
 	// Seed random numbers [gh-82] if on Windows. See https://github.com/laverdet/node-fibers/issues/82
 	if(process.platform === 'win32') Math.random();
-	
-		
+
+
 	// Look for binary for this platform
 	var nodeV = 'node-' + /[0-9]+\.[0-9]+/.exec(process.versions.node)[0];
 	var nodeVM = 'node-' + /[0-9]+/.exec(process.versions.node)[0];
@@ -41,7 +41,7 @@
 			var res;
 
 			fn.apply(this, args);
-			module.exports.loopWhile(function(){return !done;});
+			module.exports.loopWhile(function(){ return !done; });
 			if (err)
 				throw err;
 
@@ -50,22 +50,23 @@
 			function cb(e, r) {
 				err = e;
 				res = r;
-				done = true;		
+				done = true;
 			}
 		}
 	}
-	
+
 	module.exports = deasync;
-	
+	module.exports.default = deasync;
+
 	module.exports.sleep = deasync(function(timeout, done) {
 		setTimeout(done, timeout);
 	});
-	
+
 	module.exports.runLoopOnce = function(){
 		process._tickCallback();
 		binding.run();
 	};
-	
+
 	module.exports.loopWhile = function(pred){
 	  while(pred()){
 		process._tickCallback();
@@ -73,4 +74,24 @@
 	  }
 	};
 
+	module.exports.await = function(pr) {
+		var done, result;
+
+		done = false;
+		result = undefined;
+
+		pr
+			.then(function(r) {
+				done = true;
+				return result = r;
+			})
+			.catch(function(err) {
+				done = true
+				throw err
+			})
+
+		deasync.loopWhile(() => { return !done });
+		return result;
+	};
+
 }());
diff --git a/package-lock.json b/package-lock.json
index 716fb66..f2e9de7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "deasync",
-  "version": "0.1.10",
+  "version": "0.1.12",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -10,8 +10,9 @@
       "integrity": "sha1-FK1hE4EtLTfXLme0ystLtyZQXxE="
     },
     "nan": {
-      "version": "https://registry.npmjs.org/nan/-/nan-2.4.0.tgz",
-      "integrity": "sha1-+zxZ1F/k7/4hXwuJD4rfbrMtIjI="
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/nan/-/nan-2.8.0.tgz",
+      "integrity": "sha1-7XFfP+neArV6XmJS2QqWZ14fCFo="
     }
   }
 }
diff --git a/package.json b/package.json
index c84ee42..2500d4e 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,8 @@
     "async",
     "sync",
     "sleep",
+    "await",
+    "promise",
     "async wrapper"
   ],
   "engines": {
diff --git a/test.js b/test.js
index fa4ca1c..484e7e8 100644
--- a/test.js
+++ b/test.js
@@ -29,3 +29,17 @@ setTimeout(function () {
 console.log(exec('ls -la'));
 sleep(2000);
 console.log(request('http://nodejs.org'));
+
+function sleepAsync(time) {
+	return new Promise(function(resolve, reject) {
+		setTimeout(function() {
+			resolve()
+		}, time)
+	})
+}
+async function trim(str) {
+	await sleepAsync(2000)
+	return str.trim()
+}
+
+console.log(deasync.await(trim('       hello       ')))
diff --git a/test/await.demo.js b/test/await.demo.js
new file mode 100644
index 0000000..9d68b34
--- /dev/null
+++ b/test/await.demo.js
@@ -0,0 +1,32 @@
+/**
+ * Created by user on 2018/4/13/013.
+ */
+
+const deasync = require("..");
+const timstamp = Date.now();
+
+function f(n)
+{
+	return new Promise(function (done)
+	{
+		setTimeout(done, n);
+	})
+		.then(function ()
+		{
+			logWithTime(n);
+		});
+}
+
+console.time();
+f(500);
+let p = f(1500);
+deasync.sleep(1000);
+//msleep(1000);
+logWithTime(1000);
+deasync.await(p);
+console.timeEnd();
+
+function logWithTime(...argv)
+{
+	console.log(`[${Date.now() - timstamp}]`, ...argv);
+}