art_bc_support_specs.ex

art_bc_support_specs.ex

defmodule Support do
  @type customer :: %{id: integer, last_ticket_id: integer}
  @spec get_customer(integer) :: {:ok, customer} | {:error, binary}
  def get_customer(customer_id) when is_integet(customer_id) do
    # your logic here ...
    # return the common pattern {:ok, data} or {:error, data}
    {:ok, customer}
  end
end