A GTIN (Global Trade Item Number) & UPC (Universal Price Code) Generation and Validation Library in Elixir under the GS1 specification.

• GTIN-8 (EAN/UCC-8): this is an 8-digit number used predominately outside of North America
• GTIN-12 (UPC-A): this is a 12-digit number used primarily in North America
• GTIN-13 (EAN/UCC-13): this is a 13-digit number used predominately outside of North America - Global Location Number (GLN)
• GTIN-14 (EAN/UCC-14 or ITF-14): this is a 14-digit number used to identify trade items at various packaging levels

• Supports GTIN-8, GTIN-12 (UPC-12), GTIN-13 (GLN), GTIN-14
• Generate GTIN
• Check GTIN validity
• Lookup GS1 country prefix
• Convert (normalize) GTIN-13 to GTIN-14

Features to Come:

• Global Shipment Identification Number (GSIN)
• Serial Shipping Container Code (SSCC)

WARNING 1.0.1 contains breaking changes from 1.0.0 (I know this is a patch release but the breaking changes related to the deprecation of check_gtin and generate_gtin were noted in the changelog and docs over a year ago) WARNING 1.0.0 contains breaking changes from 0.4.0

Add :ex_gtin as a dependency to your project's mix.exs:

def deps do
  [{:ex_gtin, "~> 1.1.0"}]
end

and run mix deps.get to install the :ex_gtin dependency

mix deps.get

• Check GTIN codes

iex> ExGtin.validate("6291041500213")
{:ok, "GTIN-13"}

iex> ExGtin.validate("6291041500214")
{:error, "Invalid Code"}

iex> ExGtin.validate!("6291041500213")
"GTIN-13"

Pass GTIN numbers in as a String, Number or an Array

iex> number = [6, 2, 9, 1, 0, 4, 1, 5, 0, 0, 2, 1,3]
iex> ExGtin.validate(number)
{:ok, "GTIN-13"}

iex> number = 6_291_041_500_213
iex> ExGtin.validate(number)
{:ok, "GTIN-13"}

• Generate GTIN codes

iex> ExGtin.generate("629104150021")
{:ok, "6291041500213"}

iex> ExGtin.generate!("629104150021")
"6291041500213"

• Lookup GS1 Prefix

iex> ExGtin.Validation.find_gs1_prefix_country("53523235")
{:ok, "GS1 Malta"}

• Convert GTIN-13 to GTIN 14

iex> ExGtin.normalize("6291041500213")
{:ok, "06291041500213"}

• String

iex> ExGtin.validate("6291041500213")
{:ok, "GTIN-13"}

• Array of Integers

iex> ExGtin.validate([6, 2, 9, 1, 0, 4, 1, 5, 0, 0, 2, 1, 3])
{:ok, "GTIN-13"}

• Integer

iex> ExGtin.validate(6291041500213)
{:ok, "GTIN-13"}

Integers with leading zeros may not process properly

• GTIN
• How to calculate GTIN

Documentation can be found at https://hexdocs.pm/ex_gtin on HexDocs.

Run tests with

mix test

Run test coverage

MIX_ENV=test mix coveralls

Please read CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.

When making pull requests, please be sure to update the CHANGELOG.md with the corresponding changes. Please make sure that all tests pass, add tests for new functionality and that the static analysis checker credo is run. Use mix pull_request_checkout.task to ensure that everything checks out.

Run static code analysis

mix credo

Generate Documentation

mix docs

Run the gambit of tests, static analysis and coverage

mix pull_request_checkout.task

This project is sponsored by KickinEspresso

We use SemVer for versioning. For the versions available, see the tags on this repository.

Please refer to the Code of Conduct for details

Please refer to the Security for details

This project is licensed under the MIT License - see the LICENSE.md file for details

mix hex.publish