example/README.md

IMZ-Kit example #

Minimal integration. A complete, runnable application — including a virtual reader that simulates every failure mode without hardware — lives in examples/imz_kit_example.

import 'package:flutter/material.dart';
import 'package:liquid_flutter/liquid_flutter.dart';
import 'package:mtrust_imz_kit/mtrust_imz_kit.dart';
import 'package:mtrust_urp_ble_strategy/mtrust_urp_ble_strategy.dart';

/// Verifies a product with an IMZ reader.
///
/// [ImzModalBuilder] owns the whole flow: discovering a reader, connecting,
/// priming it with your payload, scanning, retries and error messages.
class VerifyButton extends StatefulWidget {
  const VerifyButton({super.key});

  @override
  State<VerifyButton> createState() => _VerifyButtonState();
}

class _VerifyButtonState extends State<VerifyButton> {
  final _strategy = UrpBleStrategy();

  @override
  void dispose() {
    _strategy.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ImzModalBuilder(
      strategy: _strategy,
      // Bound into the signed measurement — use your order or item id.
      payload: 'ORDER-4711',
      onVerificationDone: (measurement) {
        final m = measurement.measurement;
        debugPrint('reader ${m.readerSn} verified payload ${m.payload}');
        for (final result in m.result) {
          debugPrint('${result.modelId}: score ${result.scoreDistance}');
        }
      },
      onVerificationFailed: (exception) {
        debugPrint('failed (${exception.type.name}): ${exception.message}');
      },
      builder: (context, openModal) => LdButton(
        onPressed: () => openModal(),
        child: const Text('Verify'),
      ),
    );
  }
}