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	diff --git a/lib/pleroma/web/activity_pub/mrf/vocabulary_policy.ex b/lib/pleroma/web/activity_pub/mrf/vocabulary_policy.ex
	index de00b23da..74da8d57e 100644
	--- a/lib/pleroma/web/activity_pub/mrf/vocabulary_policy.ex
	+++ b/lib/pleroma/web/activity_pub/mrf/vocabulary_policy.ex
	@@ -1,34 +1,36 @@
	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicy do
	@moduledoc "Filter messages which belong to certain activity vocabularies"

	@behaviour Pleroma.Web.ActivityPub.MRF

	def filter(%{"type" => "Undo", "object" => child_message} = message) do
	with {:ok, _} <- filter(child_message) do
	{:ok, message}
	else
	{:reject, nil} ->
	{:reject, nil}
	end
	end

	def filter(%{"type" => message_type} = message) do
	with accepted_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :accept]),
	rejected_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :reject]),
	true <-
	length(accepted_vocabulary) == 0 \|\| Enum.member?(accepted_vocabulary, message_type),
	false <-
	length(rejected_vocabulary) > 0 && Enum.member?(rejected_vocabulary, message_type),
	{:ok, _} <- filter(message["object"]) do
	{:ok, message}
	else
	_ -> {:reject, nil}
	end
	end

	def filter(message), do: {:ok, message}
	+
	+ def describe, do: {:ok, %{mrf_vocabulary: Pleroma.Config.get(:mrf_vocabulary)}}
	end