runtime: define NextSessionRotation in im-online instances (#2602)

* runtime: define NextSessionRotation in im-online instances

* "Update Substrate"

Co-authored-by: parity-processbot <>

runtime/kusama/src/lib.rs

@@ -643,8 +643,8 @@ impl pallet_im_online::Config for Runtime {
 	type AuthorityId = ImOnlineId;
 	type Event = Event;
 	type ValidatorSet = Historical;
+	type NextSessionRotation = Babe;
 	type ReportUnresponsiveness = Offences;
-	type SessionDuration = SessionDuration;
 	type UnsignedPriority = ImOnlineUnsignedPriority;
 	type WeightInfo = weights::pallet_im_online::WeightInfo<Runtime>;
 }

runtime/polkadot/src/lib.rs

@@ -688,7 +688,7 @@ impl pallet_im_online::Config for Runtime {
 	type AuthorityId = ImOnlineId;
 	type Event = Event;
 	type ValidatorSet = Historical;
-	type SessionDuration = SessionDuration;
+	type NextSessionRotation = Babe;
 	type ReportUnresponsiveness = Offences;
 	type UnsignedPriority = ImOnlineUnsignedPriority;
 	type WeightInfo = weights::pallet_im_online::WeightInfo<Runtime>;

runtime/rococo/src/lib.rs

@@ -338,8 +338,8 @@ impl pallet_im_online::Config for Runtime {
 	type AuthorityId = ImOnlineId;
 	type Event = Event;
 	type ValidatorSet = Historical;
+	type NextSessionRotation = Babe;
 	type ReportUnresponsiveness = Offences;
-	type SessionDuration = SessionDuration;
 	type UnsignedPriority = StakingUnsignedPriority;
 	type WeightInfo = ();
 }

runtime/westend/src/lib.rs

@@ -423,8 +423,8 @@ impl pallet_im_online::Config for Runtime {
 	type AuthorityId = ImOnlineId;
 	type Event = Event;
 	type ValidatorSet = Historical;
+	type NextSessionRotation = Babe;
 	type ReportUnresponsiveness = Offences;
-	type SessionDuration = SessionDuration;
 	type UnsignedPriority = StakingUnsignedPriority;
 	type WeightInfo = weights::pallet_im_online::WeightInfo<Runtime>;
 }