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checkLuhn is package to assist checking PANs (credit/debit card number) or anyother number that uses the Luhn algorithum to validte.

The algorithm is in the public domain and is in wide use today. It is specifiedin ISO/IEC 7812-1. It is not intended to be a cryptographically secure hashfunction; it was designed to protect against accidental errors, not maliciousattacks. Most credit cards and many government identification numbers use thealgorithm as a simple method of distinguishing valid numbers from mistyped orotherwise incorrect numbers.

Theissuer function will can return the Card Issuer/Scheme and if that schemeis active or not

# The easiest way to get checkLuhn:install.packages("checkLuhn")

To get a bug fix, or use a feature from the development version, you caninstall dplyr from GitHub.

# install.packages("devtools")devtools::install_github("adamjdeacon/checkLuhn")

library(checkLuhn)# Invalid numberinput<-"4111 2234 2242 1234"checkLuhn(input)[1]FALSE# Valid numberinput<-"34000000 0000 009"checkLuhn(input)[1]TRUE# Check for card typeinput<-'378282246310005'> issuer(input)# A tibble: 1 x 2issueractive<chr><chr>1AmericanExpressYes

If you encounter a clear bug, please file a minimal reproducible exampleongithub.