destroy(code :: binary(), options :: keyword()) :: :ok

generate() :: binary()

generate_challenge(options :: keyword()) :: {binary(), binary(), binary()}

persist(
  code :: binary(),
  client_id :: binary(),
  redirect_uri :: binary(),
  args :: map(),
  options :: keyword()
) :: :ok | {:error, any()}

persist_challenge(
  code :: binary(),
  challenge :: binary(),
  method :: binary(),
  options :: keyword()
) :: :ok | {:error, any()}

verify(
  code :: binary(),
  client_id :: binary(),
  redirect_uri :: binary(),
  options :: keyword()
) :: {:ok, map()} | {:error, any()}

verify_challenge(verifier :: binary(), code :: binary(), options :: keyword()) ::
  :ok | {:error, any()}