Update XCM configuration

Relevant PR: paritytech/polkadot#4150

runtime/src/lib.rs

@@ -66,11 +66,11 @@ use polkadot_runtime_common::{BlockHashCount, RocksDbWeight, SlowAdjustingFeeUpd
 // XCM Imports
 use xcm::latest::prelude::*;
 use xcm_builder::{
-	AccountId32Aliases, AllowTopLevelPaidExecutionFrom, AllowUnpaidExecutionFrom, CurrencyAdapter,
-	EnsureXcmOrigin, FixedWeightBounds, IsConcrete, LocationInverter, NativeAsset,
-	ParentAsSuperuser, ParentIsDefault, RelayChainAsNative, SiblingParachainAsNative,
-	SiblingParachainConvertsVia, SignedAccountId32AsNative, SignedToAccountId32,
-	SovereignSignedViaLocation, TakeWeightCredit, UsingComponents,
+	AccountId32Aliases, AllowKnownQueryResponses, AllowSubscriptionsFrom,
+	AllowTopLevelPaidExecutionFrom, AllowUnpaidExecutionFrom, CurrencyAdapter, EnsureXcmOrigin,
+	FixedWeightBounds, IsConcrete, LocationInverter, NativeAsset, ParentAsSuperuser,
+	ParentIsDefault, RelayChainAsNative, SiblingParachainAsNative, SiblingParachainConvertsVia,
+	SignedAccountId32AsNative, SovereignSignedViaLocation, TakeWeightCredit, UsingComponents,
 };
 use xcm_executor::{Config, XcmExecutor};
 
@@ -528,12 +528,22 @@ match_type! {
 		MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Executive, .. }) }
 	};
 }
+match_type! {
+	pub type ParentOrSiblings: impl Contains<MultiLocation> = {
+		MultiLocation { parents: 1, interior: Here } |
+		MultiLocation { parents: 1, interior: X1(_) }
+	};
+}
 
 pub type Barrier = (
 	TakeWeightCredit,
 	AllowTopLevelPaidExecutionFrom<Everything>,
 	AllowUnpaidExecutionFrom<ParentOrParentsExecutivePlurality>,
 	// ^^^ Parent and its exec plurality get free execution
+	// Expected responses are OK.
+	AllowKnownQueryResponses<PolkadotXcm>,
+	// Subscriptions for version tracking are OK.
+	AllowSubscriptionsFrom<ParentOrSiblings>,
 );
 
 pub struct XcmConfig;
@@ -560,7 +570,7 @@ parameter_types! {
 }
 
 /// No local origins on this chain are allowed to dispatch XCM sends/executions.
-pub type LocalOriginToLocation = SignedToAccountId32<Origin, AccountId, RelayNetwork>;
+pub type LocalOriginToLocation = ();
 
 /// The means for routing XCM messages which are not for local execution into the right message
 /// queues.