CcValidation

Credit Card format validation

Installation

If available in Hex, the package can be installed by adding cc_validation to your list of dependencies in mix.exs:

def deps do
  [{:cc_validation, "~> 0.1.0"}]
end

Usage

Validate a card number

Valid credit card

iex> CcValidation.validate("4716892095589823")
{:ok, true}

Invalid credit card

iex> CcValidation.validate("4024007106963124")
{:error, false}

Test card returns false

iex> CcValidation.validate("4111111111111111")
{:error, false}

Validate test card numbers when check_test_numbers is true

A valid test card

iex> CcValidation.validate("4111111111111111", true)
{:ok, true, test_number: true}

An invalid test card

iex> CcValidation.validate("4212121212121212", true)
{:error, false, test_number: false}

A valid card when checking for test numbers just passes through to the validate function but will also return that it is not a test card

iex> CcValidation.validate("4716892095589823", true)
{:ok, true, test_number: false}

Card numbers that are of length less than 13 or greater than 19 are invalid.

iex> CcValidation.validate("123")
{:error, false}

iex> CcValidation.validate("12345678901234567890")
{:error, false}

Tests

Tests can be ran with mix by running mix test

Documentation

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/cc_validation.