credit_card_validator | Credit Card Validator

A Dart package that validates credit card numbers, expiration dates, and security codes (CVV/CVC) of a credit card. It also determines the type of credit card as part of the validation process.

This package should be used to quickly validate credit card data inputs and provide feedback to the user in your application's UI. It includes support for "potentially valid" inputs so that you can appropriately display the results to the user as they type.

Disclaimer: This package does not verify credit card information with the user's bank or credit company. Please use a payment processing service like Stripe or Braintree for true verification, validation, and processing of the user's payment info.

Installing

Add dependency to pubspec.yaml

Get the current version in the Installing tab on pub.dev

dependencies:
    credit_card_validator: *current-version*

Usage

A basic example

import 'package:credit_card_validator/credit_card_validator.dart';

class CreditCardValidationBloc {
    CreditCardValidator _ccValidator = CreditCardValidator()

    bool validateCreditCardInfo(string ccNum, string expDate, string cvv, ...) {
        var ccNumResults = _ccValidator.validateCCNum(ccNum);
        var expDateResults = _ccValidator.validateExpDate(expDate);
        var cvvResults = _ccValidator.validateCVV(cvv, ccNumResults.ccType);
        ...

        if(ccNumResults.isPotentiallyValid) {
            # Call UI code that shows to the user their credit card number is invalid
            displayInvalidCardNumber();
        }
    }
}

If multiple card types are detected then the returned message will include the list of conflicting cards. You can then edit/remove the cards as needed using the API available in credit_card_type_detector

Features

• Default supported cards:
  • Visa
  • Mastercard
  • American Express
  • Discover
  • Diners Club
  • JCB
  • Union Pay
  • Maestro
  • Mir
  • Elo
  • Hiper/Hipercard
• Custom defined credit cards

Inspiration Repo

This package is inspired by Braintree's Credit Card Validator JS package

Related Repos

• Credit Card Type Detector - GitHub

Author

Cholojuanito (Tanner Davis) - Creator and repo owner - Github Profile

Support

If you think this package is helpful, tell your friends, give it a star on GitHub, and a like on pub.dev

License

This project is licensed under the MIT License - see the LICENSE file for more details