PakDataKit for Dart and Flutter

Utilities for Pakistani data: CNIC, mobile numbers and networks, WhatsApp links, IBAN and banks, postal codes, cities and districts, address parsing, Roman Urdu, Hijri dates, public holidays, rupee formatting, amounts in words, NTN/STRN, landlines, Raast QR codes, and form-field helpers that format as the user types.

This is the Dart port of the pakdatakit npm package. It ships the same datasets and is tested against the same 12,000+ test vectors generated from the TypeScript library (also used by the Python port), so all three give identical results.

• Pure Dart, no dependencies
• Works on every platform: Flutter (Android, iOS, web, desktop), the Dart VM and server, and Dart compiled to JavaScript. No dart:io; the data is embedded in the package.
• Null-safe, immutable result classes with value equality and toJson()

Install

dart pub add pakdatakit
# or, in a Flutter app
flutter pub add pakdatakit

Examples

import 'package:pakdatakit/pakdatakit.dart';

validateCNIC('35202-1234567-1');             // true
getCNICInfo('35202-1234567-1');
// CNICInfo{digits: 3520212345671, formatted: 35202-1234567-1, province: Punjab, gender: male}

formatPhone('0300 1234567');                 // '+923001234567'
getNetwork('0345-1234567');                  // NetworkName.telenor
createWhatsAppLink('03001234567', 'Salam!'); // 'https://wa.me/923001234567?text=Salam!'

validateIBAN('PK36 SCBL 0000 0011 2345 6702'); // true
getBankFromIBAN('PK36SCBL0000001123456702');   // 'Standard Chartered Bank (Pakistan) Limited'
getBankInfo('MEZN')?.type;                     // BankType.islamic

getProvince('Lahore');                       // 'Punjab'
parseAddress('House 12, Street 5, Model Town Lahore 54000').postalCode; // '54000'

formatPKR(150000);                           // 'Rs. 150,000'
formatLakh(2500000);                         // '25 Lakh'
amountInWords(125000, cheque: true);         // 'Rupees One Lakh Twenty-Five Thousand Only'
numberToWords(125000, language: WordsLanguage.ur); // 'ایک لاکھ پچیس ہزار'

formatHijri(DateTime(2026, 3, 3));           // '14 Ramadan 1447'
isPakistanHoliday(DateTime(2025, 8, 14));    // true
getPakistanHolidays(2026).first;             // Holiday{id: kashmir-day, ...}

final payload = createRaastP2PQr(
  iban: 'PK36SCBL0000001123456702',
  amount: 1500,
  expiresIn: '1d', // or const Duration(days: 1)
);
validateRaastQr(payload).valid;              // true

formatCNICInput('3520212');                  // '35202-12'
checkPhoneInput('0300 12');                  // InputState.incomplete

Each module can also be imported on its own, mirroring the npm entry points:

import 'package:pakdatakit/cnic.dart';
import 'package:pakdatakit/raast.dart';

Available: address, cnic, format, geo, hijri, holidays, iban, input, networks, numbers, phone, postal, raast, tax, text, whatsapp and words.

API

Every function of the npm package is available under the same name (validateCNIC, createRaastP2PQr, …). See the API reference for what each one does. In Dart:

• Options objects are named parameters: { expiresIn: '1d' } → expiresIn: '1d', { language: 'ur' } → language: WordsLanguage.ur.
• Results are immutable classes with const constructors, == / hashCode, toString() and toJson(), which gives the same JSON (keys and values) as the npm package.
• Closed sets of strings are enums (InputState, NetworkName, NumberType, BankType, NTNType, HolidayId, RaastQrError, …), each with a .value holding the npm string, e.g. NumberType.tollFree.value == 'toll-free'.
• null where the npm package returns null.
• An ArgumentError where the npm package throws a RangeError, e.g. formatPKR(double.nan) or a Raast QR with an amount but no expiry.
• Dates are local DateTimes; only the calendar date (or, for Raast expiry, the local time) is used. getHolidaysOn and isPakistanHoliday take a DateTime or a 'YYYY-MM-DD' string.
• Whole-number options are int (Hijri offset, hijriOffset, years); amounts are num.
• ParsedRaastQr.isDynamic and createMerchantQr(isDynamic: …) are called dynamic in the npm package (dynamic is a built-in Dart type); toJson() still uses dynamic.
• createRaastP2PQr takes an optional now (the time expiresIn counts from), and expiresIn also accepts a Duration.

dataVersion gives the date the datasets were last checked against their sources; see DATA.md for where each dataset comes from.

Same results as the npm package

The datasets in lib/src/data/ are generated from the repository's shared data/*.json, and the package is tested against the shared test-vectors/, produced by running the TypeScript library over 12,080 inputs. The tests pass both on the Dart VM and compiled to JavaScript.

JavaScript behaviours that differ in Dart are reproduced exactly: whitespace and trim, full Unicode case mapping (ß → SS), NFC normalization, Math.round, number-to-string conversion, toFixed, localeCompare ordering and stable sorting.

Development

From dart/:

dart pub get
dart test

The files in lib/src/data/ are generated; don't edit them by hand. From the repository root:

node scripts/generate-dart-data.mjs

License

MIT