QRIS Parser

A Dart package for parsing QRIS (Quick Response Code Indonesian Standard) strings, based on the EMVCo QR Code Specification for Payment Systems (EMV QRCPS).

This package enables you to break down a valid QRIS code into pieces of useful information, such as the merchant name, transaction amount, city, postal code, and validation status (CRC).

Features

• Standard Compliance: Parses QRIS strings according to standard TLV (Tag-Length-Value) formatting.
• Data Extraction: Easily access fields like Merchant Name, City, Postal Code, Currency, and Amount.
• CRC Validation: Automatically verifies the CRC16-CCITT checksum to ensure data integrity.
• Nested Parsing: Supports parsing of nested objects like Merchant Account Information (ID 26-51) and Additional Data Fields (ID 62).
• Pure Dart: Zero dependencies on Flutter, meaning it runs on server-side Dart, CLIs, and generic web apps too.

Usage

Here is a simple example of how to use the package.

import 'package:qris_parser/qris_parser.dart';

void main() {
  // Example: "Fulung Store" QRIS
  String qrisData = '00020101021126570011ID.DANA.WWW011893600915387258349102098725834910303UMI51440014ID.CO.QRIS.WWW0215ID10253905048490303UMI5204481453033605802ID5912Fulung Store6014Kota Palembang61053011163047279';

  try {
    // Parse the data
    Qris qris = Qris.parse(qrisData);

    // Access the properties
    print('Merchant Name: ${qris.merchantName}');
    // Output: Fulung Store

    print('City: ${qris.merchantCity}');
    // Output: Kota Palembang

    print('CRC: ${qris.crc}');
    // Output: 7279

    // Check specific merchant account info (e.g. ID 26)
    if (qris.merchantAccountInformation.containsKey(26)) {
       print('Merchant Criteria: ${qris.merchantAccountInformation[26]?.criteria}');
    }

  } on QrisError catch (e) {
    print('Failed to parse: $e');
  }
}

Flutter Integration

This package is pure Dart, which means it works seamlessly with Flutter. You typically use it alongside a QR scanning library (such as mobile_scanner or qr_code_scanner).

Example with mobile_scanner

MobileScanner(
  onDetect: (capture) {
    final List<Barcode> barcodes = capture.barcodes;
    for (final barcode in barcodes) {
      if (barcode.rawValue != null) {
        try {
          // Parse the QRIS string from the scanner
          final qris = Qris.parse(barcode.rawValue!);

          // Data is valid Navigate to payment screen
          Navigator.push(context, MaterialPageRoute(
            builder: (context) => PaymentScreen(
              merchantName: qris.merchantName,
              amount: qris.transactionAmount,
            )
          ));

        } on QrisError catch (e) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text('Invalid QRIS Code!')),
          );
        }
      }
    }
  },
)

Reading from Image File/Gallery

If you need to scan a QRIS code from an image file (e.g., from the gallery), you can use plugins like mobile_scanner or google_ml_kit.

// Pseudo-code example using file picker and scanner
Future<void> scanFromGallery() async {
  final file = await FilePicker.platform.pickFiles();
  if (file != null) {
    // Use your preferred scanner library's 'analyzeImage' function
    final String? code = await scanner.analyzeImage(file.files.single.path!);

    if (code != null) {
      final qris = Qris.parse(code);
      print(qris.merchantName);
    }
  }
}

Supported Fields

The parser currently supports extracting the following standard fields:

• Payload Format Indicator (ID 00)
• Point of Initiation Method (ID 01)
• Merchant Account Information (ID 26-51)
• Merchant Category Code (ID 52)
• Transaction Currency (ID 53)
• Transaction Amount (ID 54)
• Tip/Convenience Indicator (ID 55)
• Fees (ID 56, 57)
• Country Code (ID 58)
• Merchant Name (ID 59)
• Merchant City (ID 60)
• Postal Code (ID 61)
• Additional Data Field (ID 62)
• CRC (ID 63)

TO-DOs

• Add more helper getters for specific merchant criteria.
• Add support for generating QRIS strings (Builder pattern).
• Improve error messages with more context.

License

MIT