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

Max Kramer

Last update: Sep 9, 2022

Related tags

Payments SwiftLuhn

Overview

SwiftLuhn

Warning! This repository is no longer maintained.

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:

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

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

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.

Comments

Release version 0.2 on Cocoapods

Hi,

On https://cocoapods.org the version available is 0.1 that is not compatible with Swift 3.

Will you release the new version on cocoapods?

At this moment I'm using the library pointing directly to your tag 0.2 on github.

Thanks!

opened by leobarrospereira 2
Invalid error
What did you do?

When I check my mastercard debit card it gives me invalid error

Please replace this with what you did.

What did you expect to happen?

Please replace this with what you expected to happen.

What actually happened instead?

Please replace this with what happened instead.

Environment

List the software versions you're using:

Xcode Version: ?.? (????) (Open Xcode; In menubar: Xcode > About Xcode)

Swift Version: ?.? (Open Xcode Preferences; Components > Toolchains. If none, use Xcode Default.)

Please also mention which package manager you used and its version. Delete the other package managers in this list:

Cocoapods: ?.?.? (Use pod --version in Terminal)

Carthage: ?.? (Use carthage version in Terminal)

Swift Package Manager ?.?.? (swiftpm-???) (Use swift build --version in Terminal)

invalid
opened by yildirimatcioglu 1
Can't detect card type

Hi I have problems when using this source if let cardType = cardNumber.suggestedCardType() { print("Fond Card Type") } But when I input card number is: 5555 5555 5555 4444 This code can't get card type

Please help me.

Thanks,

opened by hoangtam101 1
Maestro card
Added validation for maestro card and rupay card

Added a suggested card type (which ignores the length of card number) should be used while typing in the number.
opened by gauravkeshre 1
0.1.1 Tag not working
Hello there,

For some reason I have this error on pod install

[!] Unable to satisfy the following requirements:

SwiftLuhn (~> 0.1.1) required by Podfile

None of your spec sources contain a spec satisfying the dependency: SwiftLuhn (~> 0.1.1).

and in the pod file I have this:

pod 'SwiftLuhn', '~> 0.1.1'

What is happening? Broken tag?
opened by RodolfoAntonici 1
Swift 3

Introducing Swift 3 support.

Continuous integration is currently failing because CircleCI doesn't yet support Xcode 8 or Swift 3. I've opened a PR so that it can be manually tested by the community in the mean time. Unit tests are succeeding locally, so I don't have any further issues in terms of merging into master, however I'd appreciate some confirmations that this is indeed working as expected.

Cheers, Max.
enhancement help wanted

opened by maxkramer 0
Support Unionpay
The PR should summarize what was changed and why. Here are some questions to help you if you're not sure:

What behavior was changed? Added Unionpay card type.

Checklist - While not every PR needs it, new features should consider this list:

[x] Does this have tests?

[ ] Does this have documentation?

[ ] Does this break the public API (Requires major version bump)?

[x] Is this a new feature (Requires minor version bump)?
opened by limsangjin12 1
Added Brazilian Cards(Elo, Hipercard and Aura)
The PR should summarize what was changed and why. Here are some questions to help you if you're not sure:

What behavior was changed? Added Brazilian Cards, Converted to Swift 4.2

What code was refactored / updated to support this change? SwiftLuhn.swift added Elo, Hipercard and Aura

What issues are related to this PR? Or why was this change introduced?

Checklist - While not every PR needs it, new features should consider this list:

[x] Does this have tests?

[x] Does this have documentation?

[ ] Does this break the public API (Requires major version bump)?

[x] Is this a new feature (Requires minor version bump)?
opened by andre991 1
Card type detection fixed

Hi @maxkramer

The PR fixes the issue #18

The caseIterable protocol works for enumerations without associated values, so I have added a simple solution to get the count of all enum cases:

Please review.

opened by nagarro-mohitpadalia 6
Maestro and Rupay card type detection support
Can we have the card type detection for maestro and rupay cards.

looks like on line 119 (SwiftLuhn.swift)

for i in CardType.amex.rawValue...CardType.jcb.rawValue { }

This iteration should go upto CardType.mir to support the card validation for maestro and rupay.
bug help wanted
opened by nagarro-mohitpadalia 1
public class func cardType

do { let cardType = try SwiftLuhn.cardType(for: cc_number_to_check!) switch cardType{ case .visa:

using this code can't use cardType.

'cardType' is inaccessible due to 'internal' protection level

i added public:

public class func cardType(for cardNumber: String, suggest: Bool = false) throws -> CardType {

and it works

opened by alexookah 1

Releases(1.0.0)

1.0.0(Sep 1, 2018)
Updates example project to be fully Swift 4 supportive

Migrates from travis to CircleCI

Updates license and adds PR/Issue templates

Adds Mastercard 2 support thanks to @anilsanto

Source code(tar.gz)
Source code(zip)
F6A7227C-9DAE-3168-8070-109A903A5A4F.bcsymbolmap(28.81 KB)
F67A233E-8F7D-3A2A-B6B3-BCCB10960043.bcsymbolmap(32.41 KB)
SwiftLuhn.framework.zip(375.30 KB)
SwiftLuhn.framework.dSYM.zip(246.72 KB)
0.2.2(May 27, 2018)
Adds support for Swift 4

Adds Mir payment method

Source code(tar.gz)
Source code(zip)
SwiftLuhn.framework.zip(378.56 KB)
SwiftLuhn.framework.dSYM.zip(246.86 KB)
0.2.1(Dec 28, 2016)

Contains support for Carthage
Source code(tar.gz)
Source code(zip)
SwiftLuhn.framework.zip(597.31 KB)

Owner

Max Kramer

Engineering Leader // ex-BCG DV

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