diff --git a/AgoraView.tsx b/AgoraView.tsx
index fe2080403..c2b6bc563 100644
--- a/AgoraView.tsx
+++ b/AgoraView.tsx
@@ -7,7 +7,6 @@ import {
     IAgoraViewProps
 } from "./types.d";
 
-
 export default class AgoraView extends React.Component<IAgoraViewProps> {
     render() {
         return (
diff --git a/RtcEngine.ts b/RtcEngine.ts
index 9ad0d2782..e5807c40d 100644
--- a/RtcEngine.ts
+++ b/RtcEngine.ts
@@ -1,31 +1,36 @@
 import {
     NativeModules,
-    NativeAppEventEmitter
+    NativeAppEventEmitter,
+    EmitterSubscription
 } from 'react-native';
 
 import {
-    IRtcEngineOption, IRTCEngineEventScheduler,
-    String, Integer
+    IOption, IVideoOption,
+    IEventScheduler, IPublisherConfig,
+    ILiveTranscoding, ICallback,
+    String, Number
 } from "./types.d";
 
 const { Agora } = NativeModules;
 
-export default class RtcEngine extends Agora {
-    static init(options: IRtcEngineOption): void {
+export default class RtcEngine {
+
+    private static listener: EmitterSubscription  = null;
+    static init(options: IOption): void {
         this.removeEmitter();
-        super.init(options);
+        Agora.init(options);
     }
 
-    static joinChannel(channelName: String, uid?: Integer): void {
-        super.joinChannel(channelName, uid);
+    static joinChannel(channelName: String, uid?: Number): void {
+        Agora.joinChannel(channelName, uid);
     }
 
     static joinChannelWithToken(
-        channelName: string, token?: String, uid?: Integer): void {
-        super.joinChannelWithToken(token, channelName, uid);
+        channelName: string, token?: String, uid?: Number): void {
+        Agora.joinChannelWithToken(token, channelName, uid);
     }
 
-    static eventEmitter(eventScheduler: IRTCEngineEventScheduler) {
+    static eventEmitter(eventScheduler: IEventScheduler) {
         this.listener && this.listener.remove();
         this.listener = NativeAppEventEmitter.addListener('agoraEvent', event => {
             const functor = (eventScheduler as any)[event['type']];
@@ -38,11 +43,118 @@ export default class RtcEngine extends Agora {
     }
 
     static enableLastmileTest() {
-        super.enableLastmileTest();
+        Agora.enableLastmileTest();
     }
 
     static disableLastmileTest() {
-        super.disableLastmileTest();
+        Agora.disableLastmileTest();
+    }
+
+    static leaveChannel() {
+        Agora.leaveChannel();
+    }
+
+    static destroy() {
+        Agora.destroy();
+    }
+    
+    static setupLocalVideo(options: IVideoOption) {
+        Agora.setupLocalVideo(options);
+    }
+
+    static setupRemoteVideo(options: IVideoOption) {
+        Agora.setupRemoteVideo(options);
+    }
+
+    static startPreview() {
+        Agora.startPreview();
+    }
+
+    static stopPreview() {
+        Agora.stopPreview();
+    }
+
+    static configPublisher(options: IPublisherConfig) {
+        Agora.configPublisher(options);
     }
 
+    static setLiveTranscoding(options: ILiveTranscoding) {
+        Agora.setLiveTranscoding(options);
+    }
+
+    static setLocalRenderMode(mode: number) {
+        Agora.setLocalRenderMode(mode);
+    }
+
+    static setRemoteRenderMode(mode: number) {
+        Agora.setRemoteRenderMode(mode);
+    }
+
+    static enableAudioVolumeIndication(interval: number, smooth: number) {
+        Agora.enableAudioVolumeIndication(interval, smooth);
+    }
+
+    static switchCamera() {
+        Agora.switchCamera();
+    }
+
+    static enableVideo() {
+        Agora.enableVideo();
+    }
+
+    static disableVideo() {
+        Agora.disableVideo();
+    }
+
+    static setEnableSpeakerphone(status: boolean) {
+        Agora.setEnableSpeakerphone(status);
+    }
+
+    static muteLocalAudioStream(status: boolean) {
+        Agora.muteLocalAudioStream(status);
+    }
+
+    static muteRemoteAudioStream(uid: number, status: boolean) {
+        Agora.muteRemoteAudioStream(uid, status);
+    }
+
+    static setCameraTorchOn(status: boolean) {
+        Agora.setCameraTorchOn(status);
+    }
+
+    static setCameraAutoFocusFaceModeEnabled(status: boolean) {
+        Agora.setCameraAutoFocusFaceModeEnabled(status);
+    }
+
+    static setDefaultAudioRouteToSpeakerphone(status: boolean) {
+        Agora.setDefaultAudioRouteToSpeakerphone(status);
+    }
+
+    static muteLocalVideoStream(status: boolean) {
+        Agora.muteLocalVideoStream(status);
+    }
+
+    static enableLocalVideo(status: boolean) {
+        Agora.enableLocalVideo(status);
+    }
+
+    static muteAllRemoteVideoStreams(status: boolean) {
+        Agora.muteAllRemoteVideoStreams(status);
+    }
+
+    static muteRemoteVideoStream(status: boolean) {
+        Agora.muteAllRemoteVideoStreams(status);
+    }
+
+    static createDataStream(reliable: boolean, ordered: boolean, callback: ICallback<void>) {
+        Agora.createDataStream(reliable, ordered, callback);
+    }
+
+    static sendStreamMessage(streamId: number, data: any, callback: ICallback<void>) {
+        Agora.sendStreamMessage(streamId, data, callback);
+    }
+
+    static getSdkVersion(callback: ICallback<void>) {
+        Agora.getSdkVersion(callback);
+    }
 };
diff --git a/index.js b/index.js
index 26ff7714c..52622ef2e 100644
--- a/index.js
+++ b/index.js
@@ -1,2 +1,5 @@
-export { default as AgoraView } from './AgoraView';
-export { default as RtcEngine } from './RtcEngine';
\ No newline at end of file
+import _AgoraView from './AgoraView';
+import _RtcEngine from './RtcEngine';
+
+export const AgoraView = _AgoraView;
+export const RtcEngine = _RtcEngine;
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index c957967d1..000000000
--- a/package-lock.json
+++ /dev/null
@@ -1,454 +0,0 @@
-{
-  "name": "react-native-agora",
-  "version": "1.2.5",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "@types/jest": {
-      "version": "23.3.13",
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-      "dev": true
-    },
-    "@types/prop-types": {
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-      "dev": true
-    },
-    "@types/react": {
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-      "resolved": "https://registry.npmjs.org/@types/react/-/react-16.7.20.tgz",
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-      "dev": true,
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-    "@types/react-test-renderer": {
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-      "dev": true,
-      "requires": {
-        "minimist": "0.0.8"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "0.0.8",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
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-          "dev": true
-        }
-      }
-    },
-    "ms": {
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-      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
-      "dev": true
-    },
-    "path-parse": {
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-        "fast-json-stable-stringify": "2.x",
-        "json5": "2.x",
-        "make-error": "1.x",
-        "mkdirp": "0.x",
-        "resolve": "1.x",
-        "semver": "^5.5",
-        "yargs-parser": "10.x"
-      }
-    },
-    "typescript": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.2.4.tgz",
-      "integrity": "sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==",
-      "dev": true
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-      "version": "10.1.0",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
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-      "dev": true,
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-  }
-}
diff --git a/package.json b/package.json
index c0a8ad9b6..ae1da1039 100644
--- a/package.json
+++ b/package.json
@@ -27,15 +27,23 @@
     "url": "https://github.com/DBshaoYan/react-native-agora/issues"
   },
   "homepage": "https://github.com/DBshaoYan/react-native-agora#readme",
+  "peerDependencies": {
+    "react": "16.3.0",
+    "react-native": "0.57.8",
+    "react-native-typescript-transformer": "^1.2.11",
+    "tslib": "latest"
+  },
   "devDependencies": {
     "@types/jest": "^23.3.13",
     "@types/react": "^16.7.20",
     "@types/react-native": "^0.57.31",
     "@types/react-test-renderer": "^16.0.3",
-    "react-native-typescript-transformer": "^1.2.11",
     "ts-jest": "^23.10.5",
     "typescript": "^3.2.4"
   },
+  "types": [
+    "./types.d.ts"
+  ],
   "jest": {
     "preset": "react-native",
     "moduleFileExtensions": [
diff --git a/rn-cli.config.js b/rn-cli.config.js
index b1f628505..f14029b71 100644
--- a/rn-cli.config.js
+++ b/rn-cli.config.js
@@ -5,4 +5,4 @@ module.exports = {
   getSourceExts() {
     return ["ts", "tsx"];
   }
-};
\ No newline at end of file
+};
diff --git a/tsconfig.json b/tsconfig.json
index 8f6a6f36a..43990e993 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,60 +1,27 @@
 {
   "compilerOptions": {
-    /* Basic Options */
-    "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
-    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    // "lib": [],                             /* Specify library files to be included in the compilation. */
-    // "allowJs": true,                       /* Allow javascript files to be compiled. */
-    // "checkJs": true,                       /* Report errors in .js files. */
-    "jsx": "react",                           /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
-    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
-    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
-    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
-    // "outFile": "./",                       /* Concatenate and emit output to single file. */
-    // "outDir": "./",                        /* Redirect output structure to the directory. */
-    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
-    // "composite": true,                     /* Enable project compilation */
-    // "removeComments": true,                /* Do not emit comments to output. */
-    // "noEmit": true,                        /* Do not emit outputs. */
-    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
-    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
-    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
-
-    /* Strict Type-Checking Options */
-    "strict": true,                           /* Enable all strict type-checking options. */
-    "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
-    "strictNullChecks": true,              /* Enable strict null checks. */
-    "strictFunctionTypes": true,           /* Enable strict checking of function types. */
-    "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
-    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
-    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
-    "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
-
-    /* Additional Checks */
-    // "noUnusedLocals": true,                /* Report errors on unused locals. */
-    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
-    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
-
-    /* Module Resolution Options */
-    // "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
-    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
-    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
-    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
-    // "typeRoots": [],                       /* List of folders to include type definitions from. */
-    // "types": [],                           /* Type declaration files to be included in compilation. */
-    "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
-    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
-    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
-
-    /* Source Map Options */
-    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
-    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
-    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
-    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
-
-    /* Experimental Options */
-    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
-    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
-  }
-}
\ No newline at end of file
+    "target": "es5",
+    "module": "commonjs",
+    "jsx": "react-native",
+    "noEmit": true,
+    "moduleResolution": "node",
+    "importHelpers": true,
+    "allowSyntheticDefaultImports": true,
+    "noImplicitAny": false,
+    "preserveConstEnums": true,
+    "allowJs": false,
+    "strict": false,
+    "noImplicitReturns": false,
+    "noUnusedParameters": false,
+    "noUnusedLocals": false,
+    "skipLibCheck": true,
+    "baseUrl": ".",
+    "importHelpers": true,
+  },
+  "lib": [ "dom", "es5", "es6", "scripthost" ],
+  "exclude": [
+    "android",
+    "ios",
+    "node_modules"
+  ]
+}
diff --git a/types.d.ts b/types.d.ts
index bd2d42749..da4d68f8b 100644
--- a/types.d.ts
+++ b/types.d.ts
@@ -2,13 +2,93 @@ import { View, ViewProps } from 'react-native';
 
 declare module "IAgora";
 
-export interface IRtcEngineOption {
-  appid: string,
+export interface IVideoEncoderConfig {
+  width: number,
+  height: number,
+  bitrate: number,
+  frameRate: number,
+  orientationMode: number,
+};
+export interface IOption {
+  appid: String,
   videoProfile: number
   channelProfile: number,
+  videoEncoderConfig: IVideoEncoderConfig,
+  clientRole: number
 }
 
-export interface IRTCEngineEventScheduler {
+export interface IPublisherConfig {
+  width: number,
+  height: number,
+  framerate: number,
+  bitrate: number,
+  defaultLayout: number,
+  lifeCycle: number,
+  pubishUrl: string,
+  rawStreamUrl: string,
+  extraInfo: String,
+  owner: boolean
+}
+
+export interface IBackgroundImage {
+  url: string,
+  x: number,
+  y: number,
+  width: number,
+  height: number
+}
+
+export interface IRect {
+  x: number,
+  y: number,
+  width: number,
+  height: number
+};
+
+export interface ISize {
+  width: number,
+  height: number
+};
+
+export interface ITranscodingUser {
+  uid: number,
+  zOrder: number,
+  rect: Rect,
+  alpha: number,
+  audioChannel: number
+};
+
+export interface IColor {
+  red: number,
+  green: number,
+  blue: number,
+  alpha: number
+};
+
+export interface ILiveTranscoding {
+  size: ISize,
+  videoBitrate: number,
+  videoFramerate: number,
+  lowLatency: boolean,
+  videoGop: number,
+  videoCodecProfile: number,
+  transcodingUsers: Array<ITranscodingUser>,
+  transcodingExtraInfo: string,
+  watermark: IBackgroundImage,
+  backgroundImage: IBackgroundImage,
+  backgroundColor: IColor,
+  audioSampleRate: number,
+  audioBitrate: number,
+  audioChannels: number,
+};
+
+export interface IVideoOption {
+  uid: Number,
+  renderMode: number,
+  reactTag: number
+}
+
+export interface IEventScheduler {
   onFirstRemoteVideoDecoded: Function,
   onJoinChannelSuccess: Function,
   onUserOffline: Function,
@@ -21,13 +101,15 @@ export interface IRTCEngineEventScheduler {
   onStreamMessageError: Function
 }
 
+export type ICallback<T> = (err, data) => T;
+
 export type Nullable<T> = T | null | undefined;
 
 export type String = Nullable<string>;
-export type Integer = Nullable<number> | 0;
+export type Number = Nullable<number> | 0;
 
 export interface IAgoraViewProps extends ViewProps {
   showLocalVideo: boolean,
-  remoteUid: Integer,
+  remoteUid: Number,
   zOrderMediaOverlay: boolean
 }
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
deleted file mode 100644
index aee2ced6f..000000000
--- a/yarn.lock
+++ /dev/null
@@ -1,368 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-"@types/jest@^23.3.13":
-  version "23.3.13"
-  resolved "https://registry.yarnpkg.com/@types/jest/-/jest-23.3.13.tgz#c81484b6f4ca007bb09887ed15ecb3286d58f928"
-  integrity sha512-ePl4l+7dLLmCucIwgQHAgjiepY++qcI6nb8eAwGNkB6OxmTe3Z9rQU3rSpomqu42PCCnlThZbOoxsf+qylJsLA==
-
-"@types/prop-types@*":
-  version "15.5.8"
-  resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.5.8.tgz#8ae4e0ea205fe95c3901a5a1df7f66495e3a56ce"
-  integrity sha512-3AQoUxQcQtLHsK25wtTWIoIpgYjH3vSDroZOUr7PpCHw/jLY1RB9z9E8dBT/OSmwStVgkRNvdh+ZHNiomRieaw==
-
-"@types/react-native@^0.57.31":
-  version "0.57.31"
-  resolved "https://registry.yarnpkg.com/@types/react-native/-/react-native-0.57.31.tgz#ccb0500816eb444247764f571929a61b050b62ba"
-  integrity sha512-ha1nuTjMO6XWGq57fNhG+nLGR/pyLTgqPseVsts+jgBwCPlJkGKzB9dCERqJBAzA1L6dHFdwa6+HLUi9jiIYGw==
-  dependencies:
-    "@types/prop-types" "*"
-    "@types/react" "*"
-
-"@types/react-test-renderer@^16.0.3":
-  version "16.0.3"
-  resolved "https://registry.yarnpkg.com/@types/react-test-renderer/-/react-test-renderer-16.0.3.tgz#cce5c983d66cc5c3582e7c2f44b274ab635a8acc"
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-  dependencies:
-    "@types/react" "*"
-
-"@types/react@*", "@types/react@^16.7.20":
-  version "16.7.20"
-  resolved "https://registry.yarnpkg.com/@types/react/-/react-16.7.20.tgz#13ae752c012710d0fa800985ca809814b51d3b58"
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-  dependencies:
-    "@types/prop-types" "*"
-    csstype "^2.2.0"
-
-ansi-regex@^2.0.0:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-2.1.1.tgz#c3b33ab5ee360d86e0e628f0468ae7ef27d654df"
-  integrity sha1-w7M6te42DYbg5ijwRorn7yfWVN8=
-
-ansi-styles@^2.2.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
-  integrity sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=
-
-ansi-styles@^3.2.1:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.1.tgz#41fbb20243e50b12be0f04b8dedbf07520ce841d"
-  integrity sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==
-  dependencies:
-    color-convert "^1.9.0"
-
-babel-code-frame@^6.26.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.26.0.tgz#63fd43f7dc1e3bb7ce35947db8fe369a3f58c74b"
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-    chalk "^1.1.3"
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-    js-tokens "^3.0.2"
-
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-
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-  resolved "https://registry.yarnpkg.com/babel-traverse/-/babel-traverse-6.26.0.tgz#46a9cbd7edcc62c8e5c064e2d2d8d0f4035766ee"
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-    babel-messages "^6.23.0"
-    babel-runtime "^6.26.0"
-    babel-types "^6.26.0"
-    babylon "^6.18.0"
-    debug "^2.6.8"
-    globals "^9.18.0"
-    invariant "^2.2.2"
-    lodash "^4.17.4"
-
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-    lodash "^4.17.4"
-    to-fast-properties "^1.0.3"
-
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-
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