{mastodon api, twitter api}: make the follow handshake timeout configurable

config/config.exs

@@ -109,7 +109,8 @@
 config :pleroma, :activitypub,
   accept_blocks: true,
   unfollow_blocked: true,
-  outgoing_blocks: true
+  outgoing_blocks: true,
+  follow_handshake_timeout: 500
 
 config :pleroma, :user, deny_follow_blocked: true
 

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -571,11 +571,15 @@ def reject_follow_request(%{assigns: %{user: followed}} = conn, %{"id" => id}) d
     end
   end
 
+  @activitypub Application.get_env(:pleroma, :activitypub)
+  @follow_handshake_timeout Keyword.get(@activitypub, :follow_handshake_timeout)
+
   def follow(%{assigns: %{user: follower}} = conn, %{"id" => id}) do
     with %User{} = followed <- Repo.get(User, id),
          {:ok, follower} <- User.maybe_direct_follow(follower, followed),
          {:ok, _activity} <- ActivityPub.follow(follower, followed),
-         {:ok, follower, followed} <- User.wait_and_refresh(500, follower, followed) do
+         {:ok, follower, followed} <-
+           User.wait_and_refresh(@follow_handshake_timeout, follower, followed) do
       render(conn, AccountView, "relationship.json", %{user: follower, target: followed})
     else
       {:error, message} ->

lib/pleroma/web/twitter_api/twitter_api.ex

@@ -20,11 +20,15 @@ def delete(%User{} = user, id) do
     end
   end
 
+  @activitypub Application.get_env(:pleroma, :activitypub)
+  @follow_handshake_timeout Keyword.get(@activitypub, :follow_handshake_timeout)
+
   def follow(%User{} = follower, params) do
     with {:ok, %User{} = followed} <- get_user(params),
          {:ok, follower} <- User.maybe_direct_follow(follower, followed),
          {:ok, activity} <- ActivityPub.follow(follower, followed),
-         {:ok, follower, followed} <- User.wait_and_refresh(500, follower, followed) do
+         {:ok, follower, followed} <-
+           User.wait_and_refresh(@follow_handshake_timeout, follower, followed) do
       {:ok, follower, followed, activity}
     else
       err -> err