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 4. If your project doesn't support Swift 4 yet, please use the 0.2.1 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 or Carthage (with or without using our pre-built binary).

To install it, simply add the following line to your Podfile:

pod "SwiftLuhn" # use '0.2.1' for Swift 3.X

Or alternatively the following line to your Cartfile:

github "MaxKramer/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:

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

Unit Tests

To run the unit test suite, please open the example project and hit CMD + U.

Sources

Author

Max Kramer, [email protected], @maxkramer

License

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