Provides function validate/1 to check NIP number.
Validate NIP number
Validate NIP number.
iex> PolishValidators.Nip.validate("6597068174") { :ok, "Valid" } iex> PolishValidators.Nip.validate("6597068172") { :error, "Wrong checksum" } iex> PolishValidators.Nip.validate("65970681") { :error, "Invalid length" }