open link in browser and return to app

[m0agh]

I've developing an app in react-native that should communicate with a gateway for payments, after finishing the payment process (success or failure) I need to show an alert to user. For this purpose, I open a link in WebView and after that I get return's url with onNavigationStateChange and show success or failure message.

But, this flow for security issues must be done in a default device browser.

Current Code:

const BASEURL = 'https://gatewayURL/?ID=';
let Token = null;
let paymentAccepted = null;
let paymentFactorId = null;

class Gateway extends PureComponent {
  static propTypes = {
    dispatch: PropTypes.func,
    navigation: PropTypes.any,
  }

  componentWillMount() {
    this.props.dispatch(getPaymentStatus());
  }


  _onLoad(webViewState) {
    let url = webViewState.url.toString();
    let isResponseValid = url.includes('backFromGateway');
    if(isResponseValid){
      if(this.props.checkedPaymentStatus != 'checked' ){
        setTimeout(() => {
          this.props.dispatch(setPaymentStatus('checked'));
        
          let splitedURL = url.split("/");
          paymentFactorId = splitedURL[splitedURL.length -2];
          if(splitedURL[splitedURL.length - 1] === '0'){
            paymentAccepted = true;
            this.props.dispatch(setGatewayResponse('done', paymentFactorId));
          }
          else {
            paymentAccepted = false;
            this.props.dispatch(setGatewayResponse('rejected', paymentFactorId));
          }

          
          this.props.navigation.navigate('BackFromGateway', { title: '' })
        }, 1000);
      }
    }
  }


  render() {
    const { addNewOrderGatewayToken, checkedPaymentStatus } = this.props;
    token = addNewOrderGatewayToken;
    let view = null;
    if(checkedPaymentStatus !== 'checked'){
      view =  <WebView onNavigationStateChange={this._onLoad.bind(this)} style={styles.container} source={{ uri: `${BASEURL}${token}`  }}/>
    }
    else{
      view = <View></View>
    }

    return (
      <View style={styles.container}>
        {view}
      </View>      
    );
  }
}

Any idea?
Thanks

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