billing_country 1.0.0

Cross-platform Flutter plugin to get the App Store / Google Play billing country and gate third-party payments.

example/lib/main.dart

import 'package:billing_country/billing_country.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _country = 'Loading…';
  bool _externalPaymentSupported = false;

  @override
  void initState() {
    super.initState();
    _load();
  }

  Future<void> _load() async {
    // Demo: drive the supported-country lists from a remote source. In a real
    // app the fetcher would hit Firebase Remote Config / your backend; here it
    // returns a static JSON string. Never throws.
    await BillingCountry.updateFromRemote(
      () async => '{"appStore":["US"],"playStore":["IN","RU","KR"]}',
    );

    final String? country = await BillingCountry.getCountryCode();
    final bool supported = await BillingCountry.isExternalPaymentSupportedHere();

    if (!mounted) return;
    setState(() {
      _country = country ?? 'Unknown';
      _externalPaymentSupported = supported;
    });
  }

  @override
  Widget build(BuildContext context) {
    final BillingStore store = BillingCountry.store;
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('billing_country example')),
        body: Center(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Text('Store: ${store.name}'),
              const SizedBox(height: 8),
              Text('Billing country: $_country'),
              const SizedBox(height: 8),
              Text(
                _externalPaymentSupported
                    ? 'Third-party payment: supported here'
                    : 'Third-party payment: not configured for here',
              ),
              const SizedBox(height: 16),
              ElevatedButton(onPressed: _load, child: const Text('Reload')),
            ],
          ),
        ),
      ),
    );
  }
}