ORML comeback

Cargo.toml

@@ -53,6 +53,10 @@ frame-system = { version = "32.0.0", default-features = false }
 frame-system-benchmarking = { version = "32.0.0", default-features = false }
 frame-system-rpc-runtime-api = { version = "30.0.0", default-features = false }
 frame-try-runtime = { version = "0.38.0", default-features = false }
+orml-traits = { version = "0.10", default-features = false }
+orml-xcm = { version = "0.10", default-features = false }
+orml-xcm-support = { version = "0.10", default-features = false }
+orml-xtokens = { version = "0.10", default-features = false }
 pallet-asset-conversion = { version = "14.0.0", default-features = false }
 pallet-assets = { version = "33.0.0", default-features = false }
 pallet-aura = { version = "31.0.0", default-features = false }

polkadot-parachains/integritee-runtime/Cargo.toml

@@ -32,6 +32,10 @@ frame-support = { workspace = true }
 frame-system = { workspace = true }
 frame-system-rpc-runtime-api = { workspace = true }
 frame-try-runtime = { workspace = true, optional = true }
+orml-traits = { workspace = true }
+orml-xcm = { workspace = true }
+orml-xcm-support = { workspace = true }
+orml-xtokens = { workspace = true }
 pallet-asset-conversion = { workspace = true }
 pallet-asset-registry = { workspace = true }
 pallet-assets = { workspace = true }
@@ -119,6 +123,10 @@ std = [
     "frame-try-runtime?/std",
     "integritee-parachains-common/std",
     "log/std",
+    "orml-traits/std",
+    "orml-xcm-support/std",
+    "orml-xcm/std",
+    "orml-xtokens/std",
     "pallet-assets/std",
     "pallet-asset-conversion/std",
     "pallet-asset-registry/std",
@@ -183,6 +191,7 @@ runtime-benchmarks = [
     "frame-system-benchmarking/runtime-benchmarks",
     "frame-system/runtime-benchmarks",
     "hex-literal",
+    "orml-xtokens/runtime-benchmarks",
     "pallet-assets/runtime-benchmarks",
     "pallet-asset-conversion/runtime-benchmarks",
     "pallet-asset-registry/runtime-benchmarks",
@@ -224,6 +233,8 @@ try-runtime = [
     "frame-executive/try-runtime",
     "frame-system/try-runtime",
     "frame-try-runtime/try-runtime",
+    "orml-xcm/try-runtime",
+    "orml-xtokens/try-runtime",
     "pallet-assets/try-runtime",
     "pallet-asset-conversion/try-runtime",
     "pallet-asset-registry/try-runtime",

polkadot-parachains/integritee-runtime/src/lib.rs

@@ -790,6 +790,11 @@ impl pallet_democracy::Config for Runtime {
 	type SubmitOrigin = frame_system::EnsureSigned<AccountId>;
 }
 
+impl orml_xcm::Config for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+	type SovereignOrigin = EnsureRoot<AccountId>;
+}
+
 pub type AssetBalance = Balance;
 
 /// always denies creation of assets
@@ -976,8 +981,8 @@ construct_runtime!(
 		PolkadotXcm: pallet_xcm = 31,
 		CumulusXcm: cumulus_pallet_xcm = 32,
 		MessageQueue: pallet_message_queue = 33,
-		//XTokens: orml_xtokens = 34,
-		//OrmlXcm: orml_xcm = 35,
+		XTokens: orml_xtokens = 34,
+		OrmlXcm: orml_xcm = 35,
 		XcmTransactor: pallet_xcm_transactor = 36,
 
 		// fungibles

polkadot-parachains/integritee-runtime/src/xcm_config.rs

@@ -34,6 +34,10 @@ use frame_support::{
 };
 use frame_system::EnsureRoot;
 use integritee_parachains_common::xcm_config::IsNativeConcrete;
+use orml_traits::{
+	location::{RelativeReserveProvider, Reserve},
+	parameter_type_with_key,
+};
 use pallet_xcm::XcmPassthrough;
 use parachains_common::{message_queue::ParaIdToSibling, AssetIdForTrustBackedAssets};
 use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
@@ -479,3 +483,81 @@ impl Convert<CurrencyId, Option<Location>> for CurrencyIdConvert {
 		}
 	}
 }
+
+parameter_types! {
+	pub SelfReserveAlias: Location = Location::new(
+		0, [TEER_GENERAL_KEY]
+	);
+	// This is how we are going to detect whether the asset is a Reserve asset
+	pub SelfLocation: Location = Location::here();
+	// We need this to be able to catch when someone is trying to execute a non-
+	// cross-chain transfer in xtokens through the absolute path way
+	pub SelfLocationAbsolute: Location = Location::new(
+		1,
+		[Parachain(ParachainInfo::parachain_id().into())]
+	);
+
+}
+
+/// This struct offers uses RelativeReserveProvider to output relative views of Locations
+/// However, additionally accepts a Location that aims at representing the chain part
+/// (parent: 1, Parachain(paraId)) of the absolute representation of our chain.
+/// If a token reserve matches against this absolute view, we return  Some(Location::here())
+/// This helps users by preventing errors when they try to transfer a token through xtokens
+/// to our chain (either inserting the relative or the absolute value).
+pub struct AbsoluteAndRelativeReserve<AbsoluteLocation>(PhantomData<AbsoluteLocation>);
+
+impl<AbsoluteLocation> Reserve for AbsoluteAndRelativeReserve<AbsoluteLocation>
+where
+	AbsoluteLocation: Get<Location>,
+{
+	fn reserve(asset: &Asset) -> Option<Location> {
+		RelativeReserveProvider::reserve(asset).map(|relative_reserve| {
+			if relative_reserve == AbsoluteLocation::get() {
+				Location::here()
+			} else {
+				relative_reserve
+			}
+		})
+	}
+}
+
+pub struct AccountIdToLocation;
+
+impl Convert<AccountId, Location> for AccountIdToLocation {
+	fn convert(account: AccountId) -> Location {
+		Location::new(0, [Junction::AccountId32 { network: None, id: account.into() }])
+	}
+}
+
+// The min fee amount in fee asset is split into two parts:
+//
+// - fee asset sent to fee reserve chain = fee_amount - min_xcm_fee
+// - fee asset sent to dest reserve chain = min_xcm_fee
+// Check out for more information:
+// https://github.com/open-web3-stack/open-runtime-module-library/tree/master/xtokens#transfer-multiple-currencies
+
+parameter_type_with_key! {
+	pub ParachainMinFee: |_location: Location| -> Option<u128> {
+		None
+	};
+}
+
+impl orml_xtokens::Config for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+	type Balance = Balance;
+	type CurrencyId = CurrencyId;
+	type CurrencyIdConvert = CurrencyIdConvert;
+	type AccountIdToLocation = AccountIdToLocation;
+	type SelfLocation = SelfLocation;
+	type XcmExecutor = XcmExecutor<XcmConfig>;
+	type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
+	type BaseXcmWeight = BaseXcmWeight;
+	type UniversalLocation = UniversalLocation;
+	type MaxAssetsForTransfer = MaxAssetsForTransfer;
+	type MinXcmFee = ParachainMinFee;
+	type LocationsFilter = Everything;
+	type ReserveProvider = AbsoluteAndRelativeReserve<SelfLocationAbsolute>;
+	type RateLimiterId = ();
+	type RateLimiter = ();
+}