Luhnify

A simply node.js module to generate random Luhn algorithm sequences.

Example

var luhnify = require('luhnify')
 
// Random visa credit card number.
var cc = luhnify( '4### #### #### ####' )
 
// Random Canadian social insurance number.
var sin = luhnify( '###-###-###' )
 
// Also, validate sequences
luhnify.validate( sin ) === true
luhnify.validate( '123' ) === false

API

luhnify( sequence, token='#' )

Replace all token characters in sequence with digits between 0-9 and return a valid Luhn sequence.

If a Number is provided, a sequence of that many digits will be returned.

The token argument will specific a token to replace other than '#'. This token must be a single character.

If no valid sequence can be generated ( no tokens to replace ), an Error will be thrown.

validate( sequence )

Return true if a sequence is valid or false if it is not.