@@ -0,0 +7,6 @@
+
+use crate::{Ruma, router::ClientIdentity};
+
+/// # `POST /_matrix/client/unstable/org.continuwuity.msc4560.stripped_state/{room_id_or_alias}`
+///
+/// Returns a room's stripped state.

@@ -0,0 +21,9 @@
+		return Err!(Request(TooLarge("Too many vias, please be less indecisive.")));
+	}
+
+	if body.is_empty() {
+		// hey jimmy, gimme a stripped state with nuthin'
+		return Ok(get_stripped_state::unstable::Response::new(
+			services.globals.server_name().to_owned(),
+		));
+	}

@@ -35,9 +25,6 @@ pub(crate) async fn create_join_event_template_route(
 	State(services): State<crate::State>,
 	body: Ruma<prepare_join_event::v1::Request>,
 ) -> Result<prepare_join_event::v1::Response> {
-	if !services.rooms.metadata.exists(&body.room_id).await {
-		return Err!(Request(NotFound("Room is unknown to this server.")));
-	}

@@ -114,2 +157,6 @@
+			// We can't sign this, and if we don't sign it our event will fail
+			// the auth check, so we have to bail out here.
+			return Err!(Request(InvalidParam(
+				"join_authorized_via_users_server was supplied for a room that is not restricted"
 			)));
 		}

@@ -0,0 +7,6 @@
+
+use crate::Ruma;
+
+/// # `POST /_matrix/federation/unstable/org.continuwuity.msc4560.stripped_state/{room_id}`
+///
+/// Returns a room's stripped state.

@@ -0,0 +14,6 @@
+	State(services): State<crate::State>,
+	body: Ruma<get_stripped_state::unstable::Request>,
+) -> Result<get_stripped_state::unstable::Response> {
+	if body.is_empty() {
+		return Ok(get_stripped_state::unstable::Response::default());
+	}

@@ -240,2 +273,3 @@
+					// to federation.
 					auth_user = self
-						.select_authorising_user(room_id, sender_user, &state_lock)
+						.select_authorizing_user(room_id, sender_user, state_lock)

@@ -809,3 +816,3 @@
 	/// Attempts to find a user who is able to issue an invite in the target
 	/// room.
-	pub async fn select_authorising_user<'a>(
+	pub async fn select_authorizing_user<'a>(

@@ -941,0 +936,4 @@
+						.meowlnir_accept_make_join(room_id.to_owned(), user_id.to_owned())
+						.await
+				} else {
+					// Servers can't pass the spam checker.

@@ -539,0 +565,8 @@
+			.build_local_stripped_state(room_id, state, num_joined_members)
+			.await
+		{
+			if self.user_may_see_summary(querying_user, room_id).await {
+				Accessibility::Accessible((self.services.globals.server_name().to_owned(), state))
+			} else {
+				Accessibility::Inaccessible
+			}

@@ -539,0 +588,8 @@
+			.build_local_stripped_state(room_id, state, num_joined_members)
+			.await
+		{
+			if self.server_may_see_summary(querying_server, room_id).await {
+				Accessibility::Accessible(state)
+			} else {
+				Accessibility::Inaccessible
+			}