/CreditCardValidator

A C# library for validating and generating credit card numbers.

Primary LanguageC#MIT LicenseMIT

CreditCardValidator .NET Core

CreditCardValidator helps you implementing validations for the most common credit card brands, verifying length, prefixes and checking the card number through the Luhn algorithm if necessary.

Nuget Package -> https://www.nuget.org/packages/CreditCardValidator

Supported Card Issuers

The following card issuers are supported:

AmericanExpress MasterCard Maestro DinersClub Discover
Hipercard Visa Laser ChinaUnionPay Dankort
Rupay ArCa Switch JCB

Usage

CreditCardDetector

CreditCardDetector detector = new CreditCardDetector("4012 8888 8888 1881");
detector.CardNumber; // => 4012888888881881

detector.IsValid(); // => True
detector.IsValid(CardIssuer.Maestro); // => False

detector.Brand; // => CardIssuer.Visa
detector.BrandName; // => Visa

detector.IssuerCategory; // => Banking and financial

CreditCardFactory

Generates random credit card numbers of a specific CardIssuer.

string visaNumber = CreditCardFactory.RandomCardNumber(CardIssuer.Visa);
// => 4953089013607
string amexNumber = CreditCardFactory.RandomCardNumber(CardIssuer.AmericanExpress);
// => 373485467448025
string masterCardNumber = CreditCardFactory.RandomCardNumber(CardIssuer.MasterCard);
// => 5201294442453002
string chinaUnionPayNumber = CreditCardFactory.RandomCardNumber(CardIssuer.ChinaUnionPay);
// => 6280209982074556

Generates random credit card numbers of a specific CardIssuer with any valid card length.

string visaNumber = CreditCardFactory.RandomCardNumber(CardIssuer.Visa, 16);
// => 4556672647860978

CreditCardStringExtension

"4953089013607".CreditCardBrand(); // => CardIssuer.Visa

"4953089013607".CreditCardBrandName() // => Visa

"348051773827666".ValidCreditCardBrand(CardIssuer.AmericanExpress); // => True

"495308".CreditCardBrandIgnoreLength(); // => CardIssuer.Visa

"495308".CreditCardBrandNameIgnoreLength() // => Visa

Luhn

Luhn.CheckLuhn("4953089013607"); // => True
Luhn.CreateCheckDigit("495308901360"); // => 7

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request