Open up Stably Ramp Trade page in a WebView and continue checkout in user's mobile browser when proceed is clicked

StablyWebView.dart

import 'package:url_launcher/url_launcher.dart';

class _WebViewExampleState extends State<WebViewExample> {
  final String url = 'https://ramp.stably.io/?address=GDXLL7ERK46AL2ISBAA2N3YZOF4RNA3L75MYRYHRJL62BFOXN3Z53RDG&network=stellar&asset=USDC&lock=true&_blank=1';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Webview Example'),
      ),
      body: WebView(
        initialUrl: url,
        javascriptMode: JavascriptMode.unrestricted,
        navigationDelegate: (NavigationRequest request) {
          if (request.url.startsWith('browser://')) {
            _launchURL(request.url.replaceFirst('browser://', 'https://'));
            return NavigationDecision.prevent;
          }
          return NavigationDecision.navigate;
        },
      ),
    );
  }

  void _launchURL(String url) async {
    if (await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'Could not launch $url';
    }
  }
}