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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Captcha.Native do
	alias Pleroma.Captcha.Service
	@behaviour Service

	@impl Service
	def new do
	case Captcha.get() do
	:error ->
	%{error: :captcha_error}

	{:ok, answer_data, img_binary} ->
	%{
	type: :native,
	token: token(),
	url: "data:image/png;base64," <> Base.encode64(img_binary),
	answer_data: answer_data
	}
	end
	end

	@impl Service
	def validate(_token, captcha, captcha) when not is_nil(captcha), do: :ok
	def validate(_token, _captcha, _answer), do: {:error, :invalid}

	defp token do
	10
	\|> :crypto.strong_rand_bytes()
	\|> Base.url_encode64(padding: false)
	end
	end