[Rococo<>Westend bridge] Allow any asset over the lane between the two Asset Hubs

cumulus/parachains/integration-tests/emulated/chains/parachains/assets/asset-hub-rococo/src/genesis.rs

@@ -21,7 +21,7 @@ use sp_core::{sr25519, storage::Storage};
 use emulated_integration_tests_common::{
 	accounts, build_genesis_storage, collators, get_account_id_from_seed,
 	PenpalSiblingSovereignAccount, PenpalTeleportableAssetLocation, RESERVABLE_ASSET_ID,
-	SAFE_XCM_VERSION,
+	SAFE_XCM_VERSION, USDT_ID,
 };
 use parachains_common::{AccountId, Balance};
 
@@ -68,7 +68,10 @@ pub fn genesis() -> Storage {
 			..Default::default()
 		},
 		assets: asset_hub_rococo_runtime::AssetsConfig {
-			assets: vec![(RESERVABLE_ASSET_ID, AssetHubRococoAssetOwner::get(), true, ED)],
+			assets: vec![
+				(RESERVABLE_ASSET_ID, AssetHubRococoAssetOwner::get(), true, ED),
+				(USDT_ID, AssetHubRococoAssetOwner::get(), true, ED),
+			],
 			..Default::default()
 		},
 		foreign_assets: asset_hub_rococo_runtime::ForeignAssetsConfig {

cumulus/parachains/integration-tests/emulated/common/src/lib.rs

@@ -51,11 +51,14 @@ pub const SAFE_XCM_VERSION: u32 = xcm::prelude::XCM_VERSION;
 
 type AccountPublic = <MultiSignature as Verify>::Signer;
 
-// This asset is added to AH as Asset and reserved transfer between Parachain and AH
+// (trust-backed) Asset registered on AH and reserve-transferred between Parachain and AH
 pub const RESERVABLE_ASSET_ID: u32 = 1;
-// This asset is added to AH as ForeignAsset and teleported between Penpal and AH
+// ForeignAsset registered on AH and teleported between Penpal and AH
 pub const TELEPORTABLE_ASSET_ID: u32 = 2;
 
+// USDT registered on AH as (trust-backed) Asset and reserve-transferred between Parachain and AH
+pub const USDT_ID: u32 = 1984;
+
 pub const PENPAL_ID: u32 = 2000;
 pub const ASSETS_PALLET_ID: u8 = 50;
 

cumulus/parachains/integration-tests/emulated/tests/assets/asset-hub-rococo/src/tests/treasury.rs

@@ -20,7 +20,7 @@ use frame_support::{
 	sp_runtime::traits::Dispatchable,
 	traits::{
 		fungible::Inspect,
-		fungibles::{Create, Inspect as FungiblesInspect, Mutate},
+		fungibles::{Inspect as FungiblesInspect, Mutate},
 	},
 };
 use parachains_common::AccountId;
@@ -163,7 +163,7 @@ fn spend_roc_on_asset_hub() {
 #[test]
 fn create_and_claim_treasury_spend_in_usdt() {
 	const ASSET_ID: u32 = 1984;
-	const SPEND_AMOUNT: u128 = 1_000_000;
+	const SPEND_AMOUNT: u128 = 10_000_000;
 	// treasury location from a sibling parachain.
 	let treasury_location: Location = Location::new(1, PalletInstance(18));
 	// treasury account on a sibling parachain.
@@ -190,13 +190,7 @@ fn create_and_claim_treasury_spend_in_usdt() {
 	AssetHubRococo::execute_with(|| {
 		type Assets = <AssetHubRococo as AssetHubRococoPallet>::Assets;
 
-		// create an asset class and mint some assets to the treasury account.
-		assert_ok!(<Assets as Create<_>>::create(
-			ASSET_ID,
-			treasury_account.clone(),
-			true,
-			SPEND_AMOUNT / 2
-		));
+		// USDT created at genesis, mint some assets to the treasury account.
 		assert_ok!(<Assets as Mutate<_>>::mint_into(ASSET_ID, &treasury_account, SPEND_AMOUNT * 4));
 		// beneficiary has zero balance.
 		assert_eq!(<Assets as FungiblesInspect<_>>::balance(ASSET_ID, &alice,), 0u128,);

cumulus/parachains/integration-tests/emulated/tests/bridges/bridge-hub-rococo/src/lib.rs

@@ -35,11 +35,13 @@ mod imports {
 		xcm_emulator::{
 			assert_expected_events, bx, Chain, Parachain as Para, RelayChain as Relay, TestExt,
 		},
+		ASSETS_PALLET_ID, USDT_ID,
 	};
 	pub use parachains_common::AccountId;
 	pub use rococo_westend_system_emulated_network::{
 		asset_hub_rococo_emulated_chain::{
-			genesis::ED as ASSET_HUB_ROCOCO_ED, AssetHubRococoParaPallet as AssetHubRococoPallet,
+			genesis::{AssetHubRococoAssetOwner, ED as ASSET_HUB_ROCOCO_ED},
+			AssetHubRococoParaPallet as AssetHubRococoPallet,
 		},
 		asset_hub_westend_emulated_chain::{
 			genesis::ED as ASSET_HUB_WESTEND_ED, AssetHubWestendParaPallet as AssetHubWestendPallet,