Substrate companion for fetching slot duration (#864)

* Substrate companion for fetching slot duration

https://github.com/paritytech/substrate/pull/10509

* update lockfile for substrate

* Update

Co-authored-by: parity-processbot <>

client/service/src/lib.rs

@@ -276,7 +276,7 @@ where
 	{
 		let pov_recovery = cumulus_client_pov_recovery::PoVRecovery::new(
 			self.overseer_handle,
-			sc_consensus_babe::Config::get_or_compute(&*client)?.slot_duration(),
+			sc_consensus_babe::Config::get(&*client)?.slot_duration(),
 			self.client,
 			self.import_queue,
 			client,