git.delta.rocks / unique-network / refs/commits / e6681da97c54

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617use frame_support::{18	traits::{19		Contains, tokens::currency::Currency as CurrencyT, OnUnbalanced as OnUnbalancedT, Get, Everything,20		fungibles,21	},22	weights::{Weight, WeightToFeePolynomial, WeightToFee},23	parameter_types, match_types,24};25use frame_system::EnsureRoot;26use sp_runtime::{27	traits::{Saturating, CheckedConversion, Zero},28	SaturatedConversion,29};30use pallet_xcm::XcmPassthrough;31use polkadot_parachain::primitives::Sibling;32use xcm::v1::{BodyId, Junction::*, MultiLocation, NetworkId, Junctions::*};33use xcm::latest::{34	AssetId::{Concrete},35	Fungibility::Fungible as XcmFungible,36	MultiAsset, Error as XcmError,37};38use xcm_builder::{39	AccountId32Aliases, AllowTopLevelPaidExecutionFrom, CurrencyAdapter, EnsureXcmOrigin,40	FixedWeightBounds, FungiblesAdapter, LocationInverter, NativeAsset, ParentAsSuperuser, RelayChainAsNative,41	SiblingParachainAsNative, SiblingParachainConvertsVia, SignedAccountId32AsNative,42	SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit, ParentIsPreset,43};44use xcm_executor::{Config, XcmExecutor, Assets};45use xcm_executor::traits::{Convert as ConvertXcm, MatchesFungible, WeightTrader, FilterAssetLocation};46use pallet_foreing_assets::{47	AssetIds, AssetIdMapping, XcmForeignAssetIdMapping, CurrencyId, NativeCurrency,48	UsingAnyCurrencyComponents, TryAsForeing, ForeignAssetId,49};50use sp_std::{borrow::Borrow, marker::PhantomData, vec, vec::Vec};51use crate::{52	Runtime, Call, Event, Origin, Balances, ParachainInfo, ParachainSystem, PolkadotXcm, XcmpQueue,53	xcm_config::Barrier54};55#[cfg(feature = "foreign-assets")]56use crate::ForeingAssets;5758use up_common::{59	types::{AccountId, Balance},60	constants::*,61};6263parameter_types! {64	pub const RelayLocation: MultiLocation = MultiLocation::parent();65	pub const RelayNetwork: NetworkId = NetworkId::Polkadot;66	pub RelayOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();67	pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();68}6970/// Type for specifying how a `MultiLocation` can be converted into an `AccountId`. This is used71/// when determining ownership of accounts for asset transacting and when attempting to use XCM72/// `Transact` in order to determine the dispatch Origin.73pub type LocationToAccountId = (74	// The parent (Relay-chain) origin converts to the default `AccountId`.75	ParentIsPreset<AccountId>,76	// Sibling parachain origins convert to AccountId via the `ParaId::into`.77	SiblingParachainConvertsVia<Sibling, AccountId>,78	// Straight up local `AccountId32` origins just alias directly to `AccountId`.79	AccountId32Aliases<RelayNetwork, AccountId>,80);8182pub struct OnlySelfCurrency;83impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {84	fn matches_fungible(a: &MultiAsset) -> Option<B> {85		match (&a.id, &a.fun) {86			(Concrete(_), XcmFungible(ref amount)) => CheckedConversion::checked_from(*amount),87			_ => None,88		}89	}90}9192/// Means for transacting assets on this chain.93pub type LocalAssetTransactor = CurrencyAdapter<94	// Use this currency:95	Balances,96	// Use this currency when it is a fungible asset matching the given location or name:97	OnlySelfCurrency,98	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:99	LocationToAccountId,100	// Our chain's account ID type (we can't get away without mentioning it explicitly):101	AccountId,102	// We don't track any teleports.103	(),104>;105106/// No local origins on this chain are allowed to dispatch XCM sends/executions.107pub type LocalOriginToLocation = (SignedToAccountId32<Origin, AccountId, RelayNetwork>,);108109/// The means for routing XCM messages which are not for local execution into the right message110/// queues.111pub type XcmRouter = (112	// Two routers - use UMP to communicate with the relay chain:113	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, ()>,114	// ..and XCMP to communicate with the sibling chains.115	XcmpQueue,116);117118/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,119/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can120/// biases the kind of local `Origin` it will become.121pub type XcmOriginToTransactDispatchOrigin = (122	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location123	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for124	// foreign chains who want to have a local sovereign account on this chain which they control.125	SovereignSignedViaLocation<LocationToAccountId, Origin>,126	// Native converter for Relay-chain (Parent) location; will converts to a `Relay` origin when127	// recognised.128	RelayChainAsNative<RelayOrigin, Origin>,129	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when130	// recognised.131	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,132	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a133	// transaction from the Root origin.134	ParentAsSuperuser<Origin>,135	// Native signed account converter; this just converts an `AccountId32` origin into a normal136	// `Origin::Signed` origin of the same 32-byte value.137	SignedAccountId32AsNative<RelayNetwork, Origin>,138	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.139	XcmPassthrough<Origin>,140);141142parameter_types! {143	// One XCM operation is 1_000_000 weight - almost certainly a conservative estimate.144	pub UnitWeightCost: Weight = 1_000_000;145	// 1200 UNIQUEs buy 1 second of weight.146	pub const WeightPrice: (MultiLocation, u128) = (MultiLocation::parent(), 1_200 * UNIQUE);147	pub const MaxInstructions: u32 = 100;148}149150match_types! {151	pub type ParentOrParentsUnitPlurality: impl Contains<MultiLocation> = {152		MultiLocation { parents: 1, interior: Here } |153		MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Unit, .. }) }154	};155}156157/*158pub type Barrier = (159	TakeWeightCredit,160	AllowTopLevelPaidExecutionFrom<Everything>,161	// ^^^ Parent & its unit plurality gets free execution162);163 */164165pub struct UsingOnlySelfCurrencyComponents<166	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,167	AssetId: Get<MultiLocation>,168	AccountId,169	Currency: CurrencyT<AccountId>,170	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,171>(172	Weight,173	Currency::Balance,174	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,175);176impl<177		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,178		AssetId: Get<MultiLocation>,179		AccountId,180		Currency: CurrencyT<AccountId>,181		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,182	> WeightTrader183	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>184{185	fn new() -> Self {186		Self(0, Zero::zero(), PhantomData)187	}188189	fn buy_weight(&mut self, weight: Weight, payment: Assets) -> Result<Assets, XcmError> {190		let amount = WeightToFee::weight_to_fee(&weight);191		let u128_amount: u128 = amount.try_into().map_err(|_| XcmError::Overflow)?;192193		// location to this parachain through relay chain194		let option1: xcm::v1::AssetId = Concrete(MultiLocation {195			parents: 1,196			interior: X1(Parachain(ParachainInfo::parachain_id().into())),197		});198		// direct location199		let option2: xcm::v1::AssetId = Concrete(MultiLocation {200			parents: 0,201			interior: Here,202		});203204		let required = if payment.fungible.contains_key(&option1) {205			(option1, u128_amount).into()206		} else if payment.fungible.contains_key(&option2) {207			(option2, u128_amount).into()208		} else {209			(Concrete(MultiLocation::default()), u128_amount).into()210		};211212		let unused = payment213			.checked_sub(required)214			.map_err(|_| XcmError::TooExpensive)?;215		self.0 = self.0.saturating_add(weight);216		self.1 = self.1.saturating_add(amount);217		Ok(unused)218	}219220	fn refund_weight(&mut self, weight: Weight) -> Option<MultiAsset> {221		let weight = weight.min(self.0);222		let amount = WeightToFee::weight_to_fee(&weight);223		self.0 -= weight;224		self.1 = self.1.saturating_sub(amount);225		let amount: u128 = amount.saturated_into();226		if amount > 0 {227			Some((AssetId::get(), amount).into())228		} else {229			None230		}231	}232}233impl<234		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,235		AssetId: Get<MultiLocation>,236		AccountId,237		Currency: CurrencyT<AccountId>,238		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,239	> Drop240	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>241{242	fn drop(&mut self) {243		OnUnbalanced::on_unbalanced(Currency::issue(self.1));244	}245}246247parameter_types! {248	pub CheckingAccount: AccountId = PolkadotXcm::check_account();249}250/// Allow checking in assets that have issuance > 0.251#[cfg(feature = "foreign-assets")]252pub struct NonZeroIssuance<AccountId, ForeingAssets>(PhantomData<(AccountId, ForeingAssets)>);253254#[cfg(feature = "foreign-assets")]255impl<AccountId, ForeingAssets> Contains<<ForeingAssets as fungibles::Inspect<AccountId>>::AssetId>256for NonZeroIssuance<AccountId, ForeingAssets>257	where258		ForeingAssets: fungibles::Inspect<AccountId>,259{260	fn contains(id: &<ForeingAssets as fungibles::Inspect<AccountId>>::AssetId) -> bool {261		!ForeingAssets::total_issuance(*id).is_zero()262	}263}264265#[cfg(feature = "foreign-assets")]266pub struct AsInnerId<AssetId, ConvertAssetId>(PhantomData<(AssetId, ConvertAssetId)>);267#[cfg(feature = "foreign-assets")]268impl<AssetId: Clone + PartialEq, ConvertAssetId: ConvertXcm<AssetId, AssetId>>269ConvertXcm<MultiLocation, AssetId> for AsInnerId<AssetId, ConvertAssetId>270	where271		AssetId: Borrow<AssetId>,272		AssetId: TryAsForeing<AssetId, ForeignAssetId>,273		AssetIds: Borrow<AssetId>,274{275	fn convert_ref(id: impl Borrow<MultiLocation>) -> Result<AssetId, ()> {276		let id = id.borrow();277278		log::trace!(279			target: "xcm::AsInnerId::Convert",280			"AsInnerId {:?}",281			id282		);283284		let parent = MultiLocation::parent();285		let here = MultiLocation::here();286		let self_location = MultiLocation::new(1, X1(Parachain(ParachainInfo::get().into())));287288		if *id == parent {289			return ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Parent));290		}291292		if *id == here || *id == self_location {293			return ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Here));294		}295296		match XcmForeignAssetIdMapping::<Runtime>::get_currency_id(id.clone()) {297			Some(AssetIds::ForeignAssetId(foreign_asset_id)) => {298				ConvertAssetId::convert_ref(AssetIds::ForeignAssetId(foreign_asset_id))299			}300			_ => ConvertAssetId::convert_ref(AssetIds::ForeignAssetId(0)),301		}302	}303304	fn reverse_ref(what: impl Borrow<AssetId>) -> Result<MultiLocation, ()> {305		log::trace!(306			target: "xcm::AsInnerId::Reverse",307			"AsInnerId",308		);309310		let asset_id = what.borrow();311312		let parent_id =313			ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Parent)).unwrap();314		let here_id =315			ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Here)).unwrap();316317		if asset_id.clone() == parent_id {318			return Ok(MultiLocation::parent());319		}320321		if asset_id.clone() == here_id {322			return Ok(MultiLocation::new(323				1,324				X1(Parachain(ParachainInfo::get().into())),325			));326		}327328		match <AssetId as TryAsForeing<AssetId, ForeignAssetId>>::try_as_foreing(asset_id.clone()) {329			Some(fid) => match XcmForeignAssetIdMapping::<Runtime>::get_multi_location(fid) {330				Some(location) => Ok(location),331				None => Err(()),332			},333			None => Err(()),334		}335	}336}337338/// Means for transacting assets besides the native currency on this chain.339#[cfg(feature = "foreign-assets")]340pub type FungiblesTransactor = FungiblesAdapter<341	// Use this fungibles implementation:342	ForeingAssets,343	// Use this currency when it is a fungible asset matching the given location or name:344	ConvertedConcreteAssetId<AssetIds, Balance, AsInnerId<AssetIds, JustTry>, JustTry>,345	// Convert an XCM MultiLocation into a local account id:346	LocationToAccountId,347	// Our chain's account ID type (we can't get away without mentioning it explicitly):348	AccountId,349	// We only want to allow teleports of known assets. We use non-zero issuance as an indication350	// that this asset is known.351	NonZeroIssuance<AccountId, ForeingAssets>,352	// The account to use for tracking teleports.353	CheckingAccount,354>;355356/// Means for transacting assets on this chain.357#[cfg(feature = "foreign-assets")]358pub type AssetTransactors = FungiblesTransactor;359#[cfg(not(feature = "foreign-assets"))]360pub type AssetTransactors = LocalAssetTransactor;361362#[cfg(feature = "foreign-assets")]363pub struct AllAsset;364#[cfg(feature = "foreign-assets")]365impl FilterAssetLocation for AllAsset {366	fn filter_asset_location(asset: &MultiAsset, origin: &MultiLocation) -> bool {367		true368	}369}370371#[cfg(feature = "foreign-assets")]372pub type IsReserve = AllAsset;373#[cfg(not(feature = "foreign-assets"))]374pub type IsReserve = NativeAsset;375376#[cfg(feature = "foreign-assets")]377type Trader<T> =378	UsingAnyCurrencyComponents<379		pallet_configuration::WeightToFee<T, Balance>,380		RelayLocation, AccountId, Balances, ()>;381#[cfg(not(feature = "foreign-assets"))]382type Trader<T> = UsingOnlySelfCurrencyComponents<383	pallet_configuration::WeightToFee<T, Balance>,384	RelayLocation,385	AccountId,386	Balances,387	(),388>;389390pub struct XcmConfig<T>(PhantomData<T>);391impl<T> Config for XcmConfig<T>392where393	T: pallet_configuration::Config,394{395	type Call = Call;396	type XcmSender = XcmRouter;397	// How to withdraw and deposit an asset.398	type AssetTransactor = LocalAssetTransactor;399	type OriginConverter = XcmOriginToTransactDispatchOrigin;400	type IsReserve = IsReserve;401	type IsTeleporter = (); // Teleportation is disabled402	type LocationInverter = LocationInverter<Ancestry>;403	type Barrier = Barrier;404	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;405	type Trader = Trader<T>;406	type ResponseHandler = (); // Don't handle responses for now.407	type SubscriptionService = PolkadotXcm;408409	type AssetTrap = PolkadotXcm;410	type AssetClaims = PolkadotXcm;411}412413impl pallet_xcm::Config for Runtime {414	type Event = Event;415	type SendXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;416	type XcmRouter = XcmRouter;417	type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;418	type XcmExecuteFilter = Everything;419	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;420	type XcmTeleportFilter = Everything;421	type XcmReserveTransferFilter = Everything;422	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;423	type LocationInverter = LocationInverter<Ancestry>;424	type Origin = Origin;425	type Call = Call;426	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;427	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;428}429430impl cumulus_pallet_xcm::Config for Runtime {431	type Event = Event;432	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;433}434435impl cumulus_pallet_xcmp_queue::Config for Runtime {436	type WeightInfo = ();437	type Event = Event;438	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;439	type ChannelInfo = ParachainSystem;440	type VersionWrapper = ();441	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;442	type ControllerOrigin = EnsureRoot<AccountId>;443	type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;444}445446impl cumulus_pallet_dmp_queue::Config for Runtime {447	type Event = Event;448	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;449	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;450}451