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I am working on RTC Oney Example
I have used the most basic example but still i am unable to view my localstream in RTC view, I dont see any error on logs, Can anyone help me what am i doing wrong?

Here is my code :

'use strict';

import React from 'react';
import 
 Platform,
 Animated,
 StyleSheet,
 View,
 Text
 from 'react-native';

import 
 RTCPeerConnection,
 RTCIceCandidate,
 RTCSessionDescription,
 RTCView,
 MediaStream,
 MediaStreamTrack,
 getUserMedia
 from 'react-native-webrtc'

export default class WebRTC extends React.Component 

 state = 
 videoURL: null,
 isFront: true
 

 componentDidMount() 
 const configuration = "iceServers": [ "url": "stun:stun.l.google.com:19302" ] ;
 const pc = new RTCPeerConnection(configuration);
 const isFront = this.state;
 MediaStreamTrack.getSources(sourceInfos => 
 console.log('MediaStreamTrack.getSources', sourceInfos);
 let videoSourceId;
 for (let i = 0; i < sourceInfos.length; i++) 
 const sourceInfo = sourceInfos[i];
 if (sourceInfo.kind === 'video' && sourceInfo.facing === (isFront ? 'front' : 'back')) 
 videoSourceId = sourceInfo.id;
 
 
 getUserMedia(
 audio: true,
 video: 
 mandatory: 
 minWidth: 500, 
 minHeight: 500
 ,
 facingMode: (isFront ? 'user' : 'environment'),
 optional: (videoSourceId ? [ sourceId: videoSourceId ] : )
 
 , (stream) => 
 console.log('Streaming OK', stream);
 this.setState(
 videoURL: stream.toURL()
 );
 pc.addStream(stream);
 , error => 
 console.log('Oops, we getting error', error.message);
 throw error;
 );
 );
 pc.createOffer((desc) => 
 pc.setLocalDescription(desc, () => 
 console.log('pc.setLocalDescription');
 , (e) => throw e; );
 , (e) => throw e; );

 pc.onicecandidate = (event) => 
 console.log('onicecandidate', event);
 ;

 

 render() 
 if (this.state.videoURL) 
 console.warn(this.state.videoURL);
 return (
 <View style=styles.container>
 <Text style=styles.text>Working On Web RTC</Text>
 <RTCView streamURL=this.state.videoURL />
 </View>

 );
 
 else 
 return (
 <View>
 <Text style=styles.text>Not Working On Web RTC</Text>
 </View>

 );
 

 

const styles = 
 text: 
 textAlign: "center"
 ,
 container: 
 flex: 1,
 backgroundColor: '#ccc',
 borderWidth: 1,
 borderColor: '#000'
 
;

It says that I need to use a signaling server, But i followed this tutorial and its working without any signaling server.

I am using : react-native-cli: 2.0.1 react-native: 0.57.4