XCM: Automatic Version Negotiation

roadmap/implementers-guide/src/types/overseer-protocol.md

@@ -441,7 +441,7 @@ enum DisputeCoordinatorMessage {
         pending_confirmation: oneshot::Sender<ImportStatementsResult>
     },
     /// Fetch a list of all recent disputes that the co-ordinator is aware of.
-    /// These are disputes which have occured any time in recent sessions, which may have already concluded.
+    /// These are disputes which have occurred any time in recent sessions, which may have already concluded.
     RecentDisputes(ResponseChannel<Vec<(SessionIndex, CandidateHash)>>),
     /// Fetch a list of all active disputes that the co-ordinator is aware of.
     /// These disputes are either unconcluded or recently concluded.
@@ -699,7 +699,7 @@ The Runtime API subsystem is responsible for providing an interface to the state
 
 This is fueled by an auxiliary type encapsulating all request types defined in the Runtime API section of the guide.
 
-> TODO: link to the Runtime API section. Not possible currently because of https://github.com/Michael-F-Bryan/mdbook-linkcheck/issues/25. Once v0.7.1 is released it will work.
+> To do: link to the Runtime API section. Not possible currently because of https://github.com/Michael-F-Bryan/mdbook-linkcheck/issues/25. Once v0.7.1 is released it will work.
 
 ```rust
 enum RuntimeApiRequest {

runtime/kusama/src/lib.rs

@@ -1299,6 +1299,7 @@ impl xcm_executor::Config for XcmConfig {
 	type ResponseHandler = XcmPallet;
 	type AssetTrap = XcmPallet;
 	type AssetClaims = XcmPallet;
+	type SubscriptionService = XcmPallet;
 }
 
 parameter_types! {
@@ -1318,7 +1319,6 @@ pub type LocalOriginToLocation = (
 	// And a usual Signed origin to be used in XCM as a corresponding AccountId32
 	SignedToAccountId32<Origin, AccountId, KusamaNetwork>,
 );
-
 impl pallet_xcm::Config for Runtime {
 	type Event = Event;
 	type SendXcmOrigin = xcm_builder::EnsureXcmOrigin<Origin, LocalOriginToLocation>;
@@ -1334,6 +1334,8 @@ impl pallet_xcm::Config for Runtime {
 	type LocationInverter = LocationInverter<Ancestry>;
 	type Origin = Origin;
 	type Call = Call;
+	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
+	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
 }
 
 parameter_types! {

runtime/rococo/src/lib.rs

@@ -672,6 +672,7 @@ impl xcm_executor::Config for XcmConfig {
 	type ResponseHandler = XcmPallet;
 	type AssetTrap = XcmPallet;
 	type AssetClaims = XcmPallet;
+	type SubscriptionService = XcmPallet;
 }
 
 parameter_types! {
@@ -703,6 +704,8 @@ impl pallet_xcm::Config for Runtime {
 	type LocationInverter = LocationInverter<Ancestry>;
 	type Origin = Origin;
 	type Call = Call;
+	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
+	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
 }
 
 impl parachains_session_info::Config for Runtime {}

runtime/test-runtime/src/lib.rs

@@ -515,6 +515,8 @@ impl pallet_xcm::Config for Runtime {
 	type XcmReserveTransferFilter = Everything;
 	type Origin = Origin;
 	type Call = Call;
+	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
+	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
 }
 
 impl parachains_hrmp::Config for Runtime {
@@ -537,7 +539,7 @@ impl pallet_test_notifier::Config for Runtime {
 pub mod pallet_test_notifier {
 	use frame_support::pallet_prelude::*;
 	use frame_system::pallet_prelude::*;
-	use pallet_xcm::{ensure_response, QueryId};
+	use pallet_xcm::ensure_response;
 	use sp_runtime::DispatchResult;
 	use xcm::latest::prelude::*;
 

runtime/test-runtime/src/xcm_config.rs

@@ -88,4 +88,5 @@ impl xcm_executor::Config for XcmConfig {
 	type ResponseHandler = super::Xcm;
 	type AssetTrap = super::Xcm;
 	type AssetClaims = super::Xcm;
+	type SubscriptionService = super::Xcm;
 }

runtime/westend/src/lib.rs

@@ -941,6 +941,7 @@ impl xcm_executor::Config for XcmConfig {
 	type ResponseHandler = XcmPallet;
 	type AssetTrap = XcmPallet;
 	type AssetClaims = XcmPallet;
+	type SubscriptionService = XcmPallet;
 }
 
 /// Type to convert an `Origin` type value into a `MultiLocation` value which represents an interior location
@@ -965,6 +966,8 @@ impl pallet_xcm::Config for Runtime {
 	type LocationInverter = LocationInverter<Ancestry>;
 	type Origin = Origin;
 	type Call = Call;
+	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
+	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
 }
 
 construct_runtime! {