Module to Convert Currencies.

CurrencyConversion is a wrapper around the currency conversion. We can define an implementation as follows:

defmodule MyApp.CurrencyConversion do
  use CurrencyConversion, otp_app: :my_app
end

Where the configuration for the Converter must be in your application environment, usually defined in your config/config.exs:

config :my_app, MyApp.CurrencyConversion,
  source: MyApp.CurrencyConversion.Source.CustomSource

If your application was generated with a supervisor (by passing --sup to mix new) you will have a lib/my_app/application.ex file containing the application start callback that defines and starts your supervisor. You just need to edit the start/2 function to start the converter as a supervisor on your application's supervisor:

def start(_type, _args) do
  children = [
    {MyApp.CurrencyConversion, []}
  ]
  opts = [strategy: :one_for_one, name: MyApp.Supervisor]
  Supervisor.start_link(children, opts)
end