kusama chains: allow arbitrary XCM execution (#261)

Kusama relay is the only chain here allowing arbitrary XCM execution.

This was enabled in paritytech/polkadot#4809 for
(afaict) allowing crafting and executing XCM DOT transfers. Now, these
are done through dedicated extrinsics and manual `pallet_xcm::execute`
is not required (for transfers at least).

AFAICT, allowing `Everything` on Kusama should also be safe at this
point (XCM is pretty mature) and fosters experimentation and more
flexibility on Kusama. But in that case, maybe we should also allow it
on Kusama system chains?

Thoughts?

CHANGELOG.md

@@ -10,6 +10,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Remove DMP queue and allow `system::authorize_upgrade` in XCM's call filter ([polkadot-fellows/runtimes#280](https://github.com/polkadot-fellows/runtimes/pull/280))
 - Add Pay Salary Collectives test ([polkadot-fellows/runtimes#260](https://github.com/polkadot-fellows/runtimes/pull/260))
 - Include patch to release stuck collator bonds ([polkadot-fellows/runtimes#289](https://github.com/polkadot-fellows/runtimes/pull/289))
+- Kusama chains: allow arbitrary XCM execution ([polkadot-fellows/runtimes#261](https://github.com/polkadot-fellows/runtimes/pull/261))
 
 ## [1.2.3] 29.04.2024
 

system-parachains/asset-hubs/asset-hub-kusama/src/xcm_config.rs

@@ -647,11 +647,9 @@ impl pallet_xcm::Config for Runtime {
 	// We want to disallow users sending (arbitrary) XCMs from this chain.
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, ()>;
 	type XcmRouter = XcmRouter;
-	// We support local origins dispatching XCM executions in principle...
+	// Anyone can execute XCM messages locally.
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
-	// ... but disallow generic XCM execution. As a result only teleports and reserve transfers are
-	// allowed.
-	type XcmExecuteFilter = Nothing;
+	type XcmExecuteFilter = Everything;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type XcmTeleportFilter = Everything;
 	type XcmReserveTransferFilter = Everything;

system-parachains/bridge-hubs/bridge-hub-kusama/src/xcm_config.rs

@@ -338,10 +338,9 @@ impl pallet_xcm::Config for Runtime {
 	// We want to disallow users sending (arbitrary) XCMs from this chain.
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, ()>;
 	type XcmRouter = XcmRouter;
-	// We support local origins dispatching XCM executions in principle...
+	// Anyone can execute XCM messages locally.
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
-	// ... but disallow generic XCM execution. As a result only teleports are allowed.
-	type XcmExecuteFilter = Nothing;
+	type XcmExecuteFilter = Everything;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type XcmTeleportFilter = Everything;
 	type XcmReserveTransferFilter = Nothing; // This parachain is not meant as a reserve location.

system-parachains/coretime/coretime-kusama/src/xcm_config.rs

@@ -286,10 +286,9 @@ impl pallet_xcm::Config for Runtime {
 	// We want to disallow users sending (arbitrary) XCM programs from this chain.
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, ()>;
 	type XcmRouter = XcmRouter;
-	// We support local origins dispatching XCM executions in principle...
+	// Anyone can execute XCM messages locally.
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
-	// ... but disallow generic XCM execution. As a result only teleports are allowed.
-	type XcmExecuteFilter = Nothing;
+	type XcmExecuteFilter = Everything;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type XcmTeleportFilter = Everything;
 	type XcmReserveTransferFilter = Nothing; // This parachain is not meant as a reserve location.

system-parachains/encointer/src/xcm_config.rs

@@ -216,11 +216,9 @@ impl pallet_xcm::Config for Runtime {
 	// We want to disallow users sending (arbitrary) XCMs from this chain.
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, ()>;
 	type XcmRouter = XcmRouter;
-	// We support local origins dispatching XCM executions in principle...
+	// Anyone can execute XCM messages locally.
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
-	// ... but disallow generic XCM execution. As a result only teleports and reserve transfers are
-	// allowed.
-	type XcmExecuteFilter = Nothing;
+	type XcmExecuteFilter = Everything;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type XcmTeleportFilter = Everything;
 	type XcmReserveTransferFilter = Everything;

system-parachains/people/people-kusama/src/xcm_config.rs

@@ -296,10 +296,9 @@ impl pallet_xcm::Config for Runtime {
 	// We want to disallow users sending (arbitrary) XCM programs from this chain.
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, ()>;
 	type XcmRouter = XcmRouter;
-	// We support local origins dispatching XCM executions in principle...
+	// Anyone can execute XCM messages locally.
 	type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
-	// ... but disallow generic XCM execution. As a result only teleports are allowed.
-	type XcmExecuteFilter = Nothing;
+	type XcmExecuteFilter = Everything;
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type XcmTeleportFilter = Everything;
 	type XcmReserveTransferFilter = Nothing; // This parachain is not meant as a reserve location.