https://github.com/adamjdeacon/checkluhn

Checks if a number is valid per the luhn algorithm
https://github.com/adamjdeacon/checkluhn

credit-card creditcard-validator luhn luhn-algorithm r validation

Last synced: about 2 months ago
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Checks if a number is valid per the luhn algorithm

• Host: GitHub
• URL: https://github.com/adamjdeacon/checkluhn
• Owner: adamjdeacon
• License: gpl-3.0
• Created: 2018-08-23T14:41:19.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2024-02-13T15:42:44.000Z (about 2 years ago)
• Last Synced: 2025-12-09T21:52:46.804Z (5 months ago)
• Topics: credit-card, creditcard-validator, luhn, luhn-algorithm, r, validation
• Language: R
• Size: 39.1 KB
• Stars: 5
• Watchers: 0
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: NEWS.md
  • License: LICENSE

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README

          
# CheckLuhn

[![Build Status](https://travis-ci.org/adamjdeacon/checkLuhn.svg?branch=master)](https://travis-ci.org/adamjdeacon/checkLuhn)

[![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/adamjdeacon/checkLuhn?branch=master&svg=true)](https://ci.appveyor.com/project/adamjdeacon/checkLuhn)

[![Coverage Status](https://codecov.io/gh/adamjdeacon/checkLuhn/branch/master/graph/badge.svg)](https://codecov.io/gh/adamjdeacon/checkLuhn?branch=master)

[![Rdoc](http://www.rdocumentation.org/badges/version/checkLuhn)](http://www.rdocumentation.org/packages/checkLuhn)

## Overview

checkLuhn is package to assist checking PANs (credit/debit card number) or any

other number that uses the Luhn algorithum to validte.

The algorithm is in the public domain and is in wide use today. It is specified 

in ISO/IEC 7812-1. It is not intended to be a cryptographically secure hash 

function; it was designed to protect against accidental errors, not malicious 

attacks. Most credit cards and many government identification numbers use the 

algorithm as a simple method of distinguishing valid numbers from mistyped or 

otherwise incorrect numbers.

The `issuer` function will can return the Card Issuer/Scheme and if that scheme

is active or not

## Installation

``` r

# The easiest way to get checkLuhn:

install.packages("checkLuhn")

```

### Development version

To get a bug fix, or use a feature from the development version, you can

install dplyr from GitHub.

``` r

# install.packages("devtools")

devtools::install_github("adamjdeacon/checkLuhn")

```

## Usage

``` r

library(checkLuhn)

# Invalid number

input <- "4111 2234 2242 1234"

checkLuhn(input)

[1] FALSE

# Valid number

input <- "34000000 0000 009"

checkLuhn(input)

[1] TRUE

# Check for card type

input <- '378282246310005'

> issuer(input)

# A tibble: 1 x 2

  issuer           active

               

1 American Express Yes  

```

## Getting help

If you encounter a clear bug, please file a minimal reproducible example

on [github](https://github.com/adamjdeacon/checkLuhn/issues).