jonasman / swiftluhn

Debit/Credit card validation port of the Luhn Algorithm in Swift

SwiftLuhn

This is a port of the Luhn Algorithm, generally used for validating debit/credit card details, written in Swift.

SwiftLuhn's HEAD is written in Swift 3. If your project doesn't support Swift 3 yet, please use the 0.1.1 tag.

Objective-C port can be found at https://github.com/MaxKramer/ObjectiveLuhn.

Usage

To run the example project, clone the repo, and run pod install from the Example directory first.

Installation

SwiftLuhn is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "SwiftLuhn"

Usage

Validation

Call the class method which will throws an exception SwiftLuhn.CardError if the card is invalid.

let cardNumber = "378282246310005"
do {
    try SwiftLuhn.performLuhnAlgorithm(with: cardNumber)
    // process payment
}
catch {
    // invalid, alert user
}

Alternatively, you can use the String category:

let isValid = cardNumber.isValidCardNumber()

Card Types

You can also get the type of the card being used which will be one of:

Card Type
American Express
Visa
Mastercard
Discover
Diner's Club
JCB

do {
    let cardType = try SwiftLuhn.cardType(of: cardNumber)
}
catch {
	// card is invalid
}

Sources

Name	Website	Reason
Paypal	http://www.paypalobjects.com/en_US/vhelp/paypalmanager_help/credit_card_numbers.htm	List of valid credit card numbers for the unit tests

Author

Max Kramer, [email protected], @maxkramer

License

SwiftLuhn is available under the MIT license. See the LICENSE file for more info.