Companion for #6511 (#1321)

* Add custom runtime upgrade for retract tip

* cargo update -p sp-io

polkadot/runtime/kusama/src/lib.rs

@@ -880,6 +880,14 @@ impl proxy::Trait for Runtime {
 	type MaxProxies = MaxProxies;
 }
 
+pub struct CustomOnRuntimeUpgrade;
+impl frame_support::traits::OnRuntimeUpgrade for CustomOnRuntimeUpgrade {
+	fn on_runtime_upgrade() -> frame_support::weights::Weight {
+		treasury::Module::<Runtime>::migrate_retract_tip_for_tip_new();
+		500_000_000
+	}
+}
+
 construct_runtime! {
 	pub enum Runtime where
 		Block = Block,
@@ -981,7 +989,14 @@ pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signatu
 /// Extrinsic type that has already been checked.
 pub type CheckedExtrinsic = generic::CheckedExtrinsic<AccountId, Nonce, Call>;
 /// Executive: handles dispatch to the various modules.
-pub type Executive = executive::Executive<Runtime, Block, system::ChainContext<Runtime>, Runtime, AllModules>;
+pub type Executive = executive::Executive<
+	Runtime,
+	Block,
+	system::ChainContext<Runtime>,
+	Runtime,
+	AllModules,
+	CustomOnRuntimeUpgrade
+>;
 /// The payload being signed in the transactions.
 pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;