Only teleport native asset

runtime/laos/src/configs/xcm_config.rs

@@ -16,7 +16,7 @@
 
 use crate::{
 	types::ToAuthor, AccountId, AllPalletsWithSystem, Balances, ParachainInfo, PolkadotXcm,
-	Runtime, RuntimeCall, RuntimeEvent, RuntimeOrigin,
+	Runtime, RuntimeCall, RuntimeEvent, RuntimeOrigin, Vec,
 };
 use core::marker::PhantomData;
 use frame_support::{
@@ -219,6 +219,21 @@ pub type XcmRouter = xcm_builder::WithUniqueTopic<(
 	crate::XcmpQueue,
 )>;
 
+//Filter all teleports that aren't the native asset
+pub struct OnlyTeleportNative;
+impl Contains<(Location, Vec<Asset>)> for OnlyTeleportNative {
+	fn contains(t: &(Location, Vec<Asset>)) -> bool {
+		t.1.iter().all(|asset| {
+			log::trace!(target: "xcm::OnlyTeleportNative", "Asset to be teleported: {:?}", asset);
+			if let Asset { id: asset_id, fun: Fungible(_) } = asset {
+				asset_id.0 == HereLocation::get()
+			} else {
+				false
+			}
+		})
+	}
+}
+
 impl pallet_xcm::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	// Determines which origins are allowed to send XCM messages.
@@ -228,7 +243,7 @@ impl pallet_xcm::Config for Runtime {
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
 	type XcmExecuteFilter = Nothing;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
-	type XcmTeleportFilter = Everything;
+	type XcmTeleportFilter = OnlyTeleportNative;
 	// Allows all reserve asset transfers.
 	type XcmReserveTransferFilter = Everything;
 	// Calculates the weight of XCM messages.

xcm-simulator/src/laosish/configs/xcm_config.rs

@@ -184,16 +184,29 @@ impl xcm_executor::Config for XcmConfig {
 pub type LocalOriginToLocation = SignedToAccountId20<RuntimeOrigin, AccountId, RelayNetwork>;
 pub type XcmRouter = EnsureDecodableXcm<crate::ParachainXcmRouter<MsgQueue>>;
 
+//Filter all teleports that aren't the native asset
+pub struct OnlyTeleportNative;
+impl Contains<(Location, Vec<Asset>)> for OnlyTeleportNative {
+	fn contains(t: &(Location, Vec<Asset>)) -> bool {
+		t.1.iter().all(|asset| {
+			log::trace!(target: "xcm::OnlyTeleportNative", "Asset to be teleported: {:?}", asset);
+			if let Asset { id: asset_id, fun: Fungible(_) } = asset {
+				asset_id.0 == HereLocation::get()
+			} else {
+				false
+			}
+		})
+	}
+}
+
 impl pallet_xcm::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
 	type XcmRouter = XcmRouter;
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
 	type XcmExecuteFilter = Nothing;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
-	// it is safe to have `Everything` as `IsTeleporter` performs an additional check on the
-	// parachain
-	type XcmTeleportFilter = Everything;
+	type XcmTeleportFilter = OnlyTeleportNative;
 	type XcmReserveTransferFilter = Everything;
 	type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
 	type UniversalLocation = UniversalLocation;