turns out we need debug_warn

adjust log volume

demote a bunch of logs

src/service/rooms/event_handler/fetch_and_handle_outliers.rs

@@ -3,11 +3,7 @@ use std::{
 	time::Instant,
 };
 
-use conduwuit::{
-	Event, PduEvent, debug, debug_error, implement,
-	matrix::event::gen_event_id_canonical_json, trace, utils::continue_exponential_backoff_secs,
-	warn,
-};
+use conduwuit::{Event, PduEvent, debug, debug_error, implement, matrix::event::gen_event_id_canonical_json, trace, utils::continue_exponential_backoff_secs, warn, debug_warn};
 use ruma::{
 	CanonicalJsonValue, EventId, OwnedEventId, RoomId, ServerName,
 	api::federation::event::get_event,
@@ -70,6 +66,30 @@ where
 
 		let mut events_all = HashSet::with_capacity(todo_auth_events.len());
 		while let Some(next_id) = todo_auth_events.pop_front() {
+			if let Some((time, tries)) = self
+				.services
+				.globals
+				.bad_event_ratelimiter
+				.read()
+				.get(&*next_id)
+			{
+				// Exponential backoff
+				const MIN_DURATION: u64 = 60 * 2;
+				const MAX_DURATION: u64 = 60 * 60;
+				if continue_exponential_backoff_secs(
+					MIN_DURATION,
+					MAX_DURATION,
+					time.elapsed(),
+					*tries,
+				) {
+					debug_warn!(
+						tried = ?*tries,
+						elapsed = ?time.elapsed(),
+						"Backing off from {next_id}",
+					);
+					continue;
+				}
+			}
 
 			if events_all.contains(&next_id) {
 				continue;