dynamic_linking.dart

import 'dart:async';

import 'package:firebase_dynamic_links/firebase_dynamic_links.dart';

class DynamicLinks {
  
  // create a link with params
  static Future<Uri> createLinkWithParams(String code) =>
      _getLink('mylink', {'code': code});
  
  // create a short link with params
  static FutureOr<Uri> _getLink(
      String category, Map<String, String> args) async {
    final Uri longLink = await _getParams(category, args).buildUrl();

    final ShortDynamicLink shortLink = await DynamicLinkParameters.shortenUrl(
      longLink,
      new DynamicLinkParametersOptions(shortDynamicLinkPathLength: ShortDynamicLinkPathLength.unguessable),
    );
            
    return shortLink.shortUrl;
  }

  // create a link with all our params and retrun DynamucLinkParameters
  static DynamicLinkParameters _getParams(
          String category, Map<String, String> args) =>
      DynamicLinkParameters(
        domain: 'linkholder.page.link',
        link: Uri.https('tap.style', category, args),
        androidParameters: AndroidParameters(
          packageName: 'com.example.app',
        ),
        iosParameters: IosParameters(bundleId: 'com.example.app'),
      );
}