Otherwise federation would have to depend on sender

@@ -1240,0 +1246,4 @@
+		let backoff_map = self.services.federation.remote_health();
+
+		if backoff_map.is_empty() {
+			return Err!("No servers in backoff.");

@@ -25,4 +12,1 @@
 ) -> bool {
-	let min = min.saturating_mul(tries).saturating_mul(tries);
-	let min = cmp::min(min, max);
-	elapsed < min

@@ -33,0 +83,4 @@
+
+	/// Marks or updates a remote's health status as unhealthy. If the remote is
+	/// not already marked as unhealthy, a new entry is created. Otherwise, the
+	/// retry count is incremented and

@@ -157,2 +174,3 @@
 				| TransactionStatus::Failed(..) => {
-					panic!("Request that was not even running failed?!")
+					panic!(
+						"{}",