nttdatapay_flutter 1.0.0

Flutter SDK for NTT DATA Payment Services India with WebView support

example/lib/main.dart

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

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

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    );
  }
}

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

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  bool loading = false;
  late String txnId;

  /// User inputs
  final String email = "[e-mail]";
  final String mobile = "8888888888";
  final String amount = "1.00";

  /// Merchant configuration (DO NOT hardcode in real apps)
  final atomConfig = const AtomConfig(
    merchId: "317159",
    txnPassword: "Test@123",
    prodId: "NSE",
    reqEncKey: "A4476C2062FFA58980DC8F79EB6A799E",
    reqSalt: "A4476C2062FFA58980DC8F79EB6A799E",
    resDecKey: "75AEF0FA1B94B3C10D4F5B268F757F11",
    resSalt: "75AEF0FA1B94B3C10D4F5B268F757F11",
    reqHashKey: "KEY123657234",
    resHashKey: "KEYRESP123657234",
    txnCurrency: "INR",
    environment: AtomEnvironment.uat,
  );

  /// Generate token + open payment
  Future<void> _payNow(BuildContext context) async {
    final BuildContext ctx = context; // ✅ capture early

    setState(() {
      loading = true;
      txnId = "INV${DateTime.now().millisecondsSinceEpoch}";
    });

    try {
      /// Generate Atom Token
      final atomTokenId = await AtomAuthService.generateToken(
        config: atomConfig,
        txnId: txnId,
        amount: amount,
        email: email,
        mobile: mobile,
        udf1: "udf1",
        udf2: "udf2",
        udf3: "udf3",
        udf4: "udf4",
        udf5: "udf5",
      );

      if (!ctx.mounted) return;

      setState(() => loading = false);

      /// Open WebView and WAIT for final result
      final AtomPaymentResult? result = await Navigator.push<AtomPaymentResult>(
        ctx,
        MaterialPageRoute(
          builder: (_) => AtomPaymentWebView(
            atomTokenId: atomTokenId,
            merchId: atomConfig.merchId,
            returnUrl: atomConfig.returnUrl,
            config: atomConfig,
            email: email,
            mobile: mobile,
            showAppBar: true,
            appBarTitle: "Complete Payment",
          ),
        ),
      );

      if (!ctx.mounted) return;

      /// HANDLE RESULT
      if (result == null) {
        _showSnack(ctx, "Payment window closed by user", Colors.orange);
        return;
      }

      switch (result.status) {
        case "OTS0000":
          _showSnack(ctx, "Payment Successful", Colors.green);
          break;

        case "OTS0551":
        case "PENDING":
          _showSnack(
            ctx,
            result.description.isNotEmpty
                ? result.description
                : "Payment Pending",
            Colors.orange,
          );
          break;

        case "OTS0600":
          _showSnack(ctx, "Payment Failed", Colors.red);
          break;

        case "CANCELLED":
          _showSnack(ctx, "Payment cancelled by user", Colors.orange);
          break;

        case "TIMEOUT":
          _showSnack(
            ctx,
            "Session timed out. Please try again.",
            Colors.orange,
          );
          break;

        default:
          _showSnack(
            ctx,
            "Payment Failed (Status: ${result.status})",
            Colors.red,
          );
      }
    } catch (e) {
      if (!ctx.mounted) return;
      setState(() => loading = false);
      _showSnack(ctx, "Payment initiation failed: $e", Colors.red);
    }
  }

  /// Snack helper (context-safe)
  void _showSnack(BuildContext ctx, String msg, Color color) {
    ScaffoldMessenger.of(
      ctx,
    ).showSnackBar(SnackBar(content: Text(msg), backgroundColor: color));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text("NTTDATAPAY Demo"), centerTitle: true),
      body: Center(
        child: loading
            ? const CircularProgressIndicator()
            : ElevatedButton(
                onPressed: () => _payNow(context),
                style: ElevatedButton.styleFrom(
                  padding: const EdgeInsets.symmetric(
                    horizontal: 40,
                    vertical: 14,
                  ),
                ),
                child: const Text("Pay Now", style: TextStyle(fontSize: 16)),
              ),
      ),
    );
  }
}