Westend/Rococo Asset Hub: pay xcm fees with sufficient assets (#2978)

Set up the `TakeFirstAssetTrader` trader for Westend and Rococo Asset Hubs to cover XCM fees with sufficient assets. This PR reintroduces previously [removed](https://github.com/paritytech/polkadot-sdk/pull/1845) trader setups, as it was decided to keep both traders, `TakeFirstAssetTrader` and `SwapFirstAssetTrader`, during the transition period. --------- Co-authored-by: Svyatoslav Nikolsky <svyatonik@gmail.com>
2026-05-30 21:01:02 +00:00 · 2024-01-18 22:04:13 +08:00
parent 13f2342edd
commit dcc76525d9
8 changed files with 1071 additions and 32 deletions
@@ -27,3 +27,78 @@ fn send_transact_as_superuser_from_relay_to_system_para_works() {
 		Some(Weight::from_parts(1_019_445_000, 200_000)),
 	)
 }
+
+/// Parachain should be able to send XCM paying its fee with sufficient asset
+/// in the System Parachain
+#[test]
+fn send_xcm_from_para_to_system_para_paying_fee_with_assets_works() {
+	let para_sovereign_account = AssetHubWestend::sovereign_account_id_of(
+		AssetHubWestend::sibling_location_of(PenpalB::para_id()),
+	);
+
+	// Force create and mint assets for Parachain's sovereign account
+	AssetHubWestend::force_create_and_mint_asset(
+		ASSET_ID,
+		ASSET_MIN_BALANCE,
+		true,
+		para_sovereign_account.clone(),
+		Some(Weight::from_parts(1_019_445_000, 200_000)),
+		ASSET_MIN_BALANCE * 1000000000,
+	);
+
+	// We just need a call that can pass the `SafeCallFilter`
+	// Call values are not relevant
+	let call = AssetHubWestend::force_create_asset_call(
+		ASSET_ID,
+		para_sovereign_account.clone(),
+		true,
+		ASSET_MIN_BALANCE,
+	);
+
+	let origin_kind = OriginKind::SovereignAccount;
+	let fee_amount = ASSET_MIN_BALANCE * 1000000;
+	let native_asset =
+		([PalletInstance(ASSETS_PALLET_ID), GeneralIndex(ASSET_ID.into())], fee_amount).into();
+
+	let root_origin = <PenpalB as Chain>::RuntimeOrigin::root();
+	let system_para_destination = PenpalB::sibling_location_of(AssetHubWestend::para_id()).into();
+	let xcm = xcm_transact_paid_execution(
+		call,
+		origin_kind,
+		native_asset,
+		para_sovereign_account.clone(),
+	);
+
+	PenpalB::execute_with(|| {
+		assert_ok!(<PenpalB as PenpalBPallet>::PolkadotXcm::send(
+			root_origin,
+			bx!(system_para_destination),
+			bx!(xcm),
+		));
+
+		PenpalB::assert_xcm_pallet_sent();
+	});
+
+	AssetHubWestend::execute_with(|| {
+		type RuntimeEvent = <AssetHubWestend as Chain>::RuntimeEvent;
+
+		AssetHubWestend::assert_xcmp_queue_success(Some(Weight::from_parts(
+			16_290_336_000,
+			562_893,
+		)));
+
+		assert_expected_events!(
+			AssetHubWestend,
+			vec![
+				RuntimeEvent::Assets(pallet_assets::Event::Burned { asset_id, owner, balance }) => {
+					asset_id: *asset_id == ASSET_ID,
+					owner: *owner == para_sovereign_account,
+					balance: *balance == fee_amount,
+				},
+				RuntimeEvent::Assets(pallet_assets::Event::Issued { asset_id, .. }) => {
+					asset_id: *asset_id == ASSET_ID,
+				},
+			]
+		);
+	});
+}