git.delta.rocks / unique-network / refs/commits / 8c9b07c4c9bd

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,20		Everything, 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	Instruction, Xcm,38};39use xcm_builder::{40	AccountId32Aliases, AllowTopLevelPaidExecutionFrom, CurrencyAdapter, EnsureXcmOrigin,41	FixedWeightBounds, FungiblesAdapter, LocationInverter, NativeAsset, ParentAsSuperuser,42	RelayChainAsNative, SiblingParachainAsNative, SiblingParachainConvertsVia,43	SignedAccountId32AsNative, SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit,44	ParentIsPreset, ConvertedConcreteAssetId,45};46use xcm_executor::{Config, XcmExecutor, Assets};47use xcm_executor::traits::{48	Convert as ConvertXcm, JustTry, MatchesFungible, WeightTrader, FilterAssetLocation,49	ShouldExecute,50};51use pallet_foreing_assets::{52	AssetIds, AssetIdMapping, XcmForeignAssetIdMapping, CurrencyId, NativeCurrency, FreeForAll,53	TryAsForeing, ForeignAssetId,54};55use sp_std::{borrow::Borrow, marker::PhantomData, vec, vec::Vec};56use crate::{57	Runtime, Call, Event, Origin, Balances, ParachainInfo, ParachainSystem, PolkadotXcm, XcmpQueue,58	xcm_config::Barrier,59};60#[cfg(feature = "foreign-assets")]61use crate::ForeingAssets;6263use up_common::{64	types::{AccountId, Balance},65	constants::*,66};6768parameter_types! {69	pub const RelayLocation: MultiLocation = MultiLocation::parent();70	pub const RelayNetwork: NetworkId = NetworkId::Polkadot;71	pub RelayOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();72	pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();73}7475/// Type for specifying how a `MultiLocation` can be converted into an `AccountId`. This is used76/// when determining ownership of accounts for asset transacting and when attempting to use XCM77/// `Transact` in order to determine the dispatch Origin.78pub type LocationToAccountId = (79	// The parent (Relay-chain) origin converts to the default `AccountId`.80	ParentIsPreset<AccountId>,81	// Sibling parachain origins convert to AccountId via the `ParaId::into`.82	SiblingParachainConvertsVia<Sibling, AccountId>,83	// Straight up local `AccountId32` origins just alias directly to `AccountId`.84	AccountId32Aliases<RelayNetwork, AccountId>,85);8687pub struct OnlySelfCurrency;88impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {89	fn matches_fungible(a: &MultiAsset) -> Option<B> {90		let paraid = Parachain(ParachainInfo::parachain_id().into());91		match (&a.id, &a.fun) {92			(93				Concrete(MultiLocation {94					parents: 1,95					interior: X1(loc),96				}),97				XcmFungible(ref amount),98			) if paraid == *loc => CheckedConversion::checked_from(*amount),99			(100				Concrete(MultiLocation {101					parents: 0,102					interior: Here,103				}),104				XcmFungible(ref amount),105			) => CheckedConversion::checked_from(*amount),106			_ => None,107		}108	}109}110111/// Means for transacting assets on this chain.112pub type LocalAssetTransactor = CurrencyAdapter<113	// Use this currency:114	Balances,115	// Use this currency when it is a fungible asset matching the given location or name:116	OnlySelfCurrency,117	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:118	LocationToAccountId,119	// Our chain's account ID type (we can't get away without mentioning it explicitly):120	AccountId,121	// We don't track any teleports.122	(),123>;124125/// No local origins on this chain are allowed to dispatch XCM sends/executions.126pub type LocalOriginToLocation = (SignedToAccountId32<Origin, AccountId, RelayNetwork>,);127128/// The means for routing XCM messages which are not for local execution into the right message129/// queues.130pub type XcmRouter = (131	// Two routers - use UMP to communicate with the relay chain:132	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, ()>,133	// ..and XCMP to communicate with the sibling chains.134	XcmpQueue,135);136137/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,138/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can139/// biases the kind of local `Origin` it will become.140pub type XcmOriginToTransactDispatchOrigin = (141	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location142	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for143	// foreign chains who want to have a local sovereign account on this chain which they control.144	SovereignSignedViaLocation<LocationToAccountId, Origin>,145	// Native converter for Relay-chain (Parent) location; will converts to a `Relay` origin when146	// recognised.147	RelayChainAsNative<RelayOrigin, Origin>,148	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when149	// recognised.150	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,151	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a152	// transaction from the Root origin.153	ParentAsSuperuser<Origin>,154	// Native signed account converter; this just converts an `AccountId32` origin into a normal155	// `Origin::Signed` origin of the same 32-byte value.156	SignedAccountId32AsNative<RelayNetwork, Origin>,157	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.158	XcmPassthrough<Origin>,159);160161parameter_types! {162	// One XCM operation is 1_000_000 weight - almost certainly a conservative estimate.163	pub UnitWeightCost: Weight = 1_000_000;164	// 1200 UNIQUEs buy 1 second of weight.165	pub const WeightPrice: (MultiLocation, u128) = (MultiLocation::parent(), 1_200 * UNIQUE);166	pub const MaxInstructions: u32 = 100;167}168169match_types! {170	pub type ParentOrParentsUnitPlurality: impl Contains<MultiLocation> = {171		MultiLocation { parents: 1, interior: Here } |172		MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Unit, .. }) }173	};174}175176pub struct DenyTransact;177impl ShouldExecute for DenyTransact {178	fn should_execute<Call>(179		_origin: &MultiLocation,180		message: &mut Xcm<Call>,181		_max_weight: Weight,182		_weight_credit: &mut Weight,183	) -> Result<(), ()> {184		let transact_inst = message.0.iter()185			.find(|inst| matches![inst, Instruction::Transact { .. }]);186187		match transact_inst {188			Some(_) => {189				log::warn!(190					target: "xcm::barrier",191					"transact XCM rejected"192				);193194				Err(())195			},196			None => Ok(())197		}198	}199}200201/// Deny executing the XCM if it matches any of the Deny filter regardless of anything else.202/// If it passes the Deny, and matches one of the Allow cases then it is let through.203pub struct DenyThenTry<Deny, Allow>(PhantomData<Deny>, PhantomData<Allow>)204    where205        Deny: ShouldExecute,206        Allow: ShouldExecute;207208impl<Deny, Allow> ShouldExecute for DenyThenTry<Deny, Allow>209    where210        Deny: ShouldExecute,211        Allow: ShouldExecute,212{213    fn should_execute<Call>(214        origin: &MultiLocation,215        message: &mut Xcm<Call>,216        max_weight: Weight,217        weight_credit: &mut Weight,218    ) -> Result<(), ()> {219        Deny::should_execute(origin, message, max_weight, weight_credit)?;220        Allow::should_execute(origin, message, max_weight, weight_credit)221    }222}223224pub struct UsingOnlySelfCurrencyComponents<225	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,226	AssetId: Get<MultiLocation>,227	AccountId,228	Currency: CurrencyT<AccountId>,229	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,230>(231	Weight,232	Currency::Balance,233	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,234);235impl<236		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,237		AssetId: Get<MultiLocation>,238		AccountId,239		Currency: CurrencyT<AccountId>,240		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,241	> WeightTrader242	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>243{244	fn new() -> Self {245		Self(0, Zero::zero(), PhantomData)246	}247248	fn buy_weight(&mut self, weight: Weight, payment: Assets) -> Result<Assets, XcmError> {249		Ok(payment)250	}251}252impl<253		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,254		AssetId: Get<MultiLocation>,255		AccountId,256		Currency: CurrencyT<AccountId>,257		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,258	> Drop259	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>260{261	fn drop(&mut self) {262		OnUnbalanced::on_unbalanced(Currency::issue(self.1));263	}264}265266parameter_types! {267	pub CheckingAccount: AccountId = PolkadotXcm::check_account();268}269/// Allow checking in assets that have issuance > 0.270#[cfg(feature = "foreign-assets")]271pub struct NonZeroIssuance<AccountId, ForeingAssets>(PhantomData<(AccountId, ForeingAssets)>);272273#[cfg(feature = "foreign-assets")]274impl<AccountId, ForeingAssets> Contains<<ForeingAssets as fungibles::Inspect<AccountId>>::AssetId>275	for NonZeroIssuance<AccountId, ForeingAssets>276where277	ForeingAssets: fungibles::Inspect<AccountId>,278{279	fn contains(id: &<ForeingAssets as fungibles::Inspect<AccountId>>::AssetId) -> bool {280		!ForeingAssets::total_issuance(*id).is_zero()281	}282}283284#[cfg(feature = "foreign-assets")]285pub struct AsInnerId<AssetId, ConvertAssetId>(PhantomData<(AssetId, ConvertAssetId)>);286#[cfg(feature = "foreign-assets")]287impl<AssetId: Clone + PartialEq, ConvertAssetId: ConvertXcm<AssetId, AssetId>>288	ConvertXcm<MultiLocation, AssetId> for AsInnerId<AssetId, ConvertAssetId>289where290	AssetId: Borrow<AssetId>,291	AssetId: TryAsForeing<AssetId, ForeignAssetId>,292	AssetIds: Borrow<AssetId>,293{294	fn convert_ref(id: impl Borrow<MultiLocation>) -> Result<AssetId, ()> {295		let id = id.borrow();296297		log::trace!(298			target: "xcm::AsInnerId::Convert",299			"AsInnerId {:?}",300			id301		);302303		let parent = MultiLocation::parent();304		let here = MultiLocation::here();305		let self_location = MultiLocation::new(1, X1(Parachain(ParachainInfo::get().into())));306307		if *id == parent {308			return ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Parent));309		}310311		if *id == here || *id == self_location {312			return ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Here));313		}314315		match XcmForeignAssetIdMapping::<Runtime>::get_currency_id(id.clone()) {316			Some(AssetIds::ForeignAssetId(foreign_asset_id)) => {317				ConvertAssetId::convert_ref(AssetIds::ForeignAssetId(foreign_asset_id))318			}319			_ => ConvertAssetId::convert_ref(AssetIds::ForeignAssetId(0)),320		}321	}322323	fn reverse_ref(what: impl Borrow<AssetId>) -> Result<MultiLocation, ()> {324		log::trace!(325			target: "xcm::AsInnerId::Reverse",326			"AsInnerId",327		);328329		let asset_id = what.borrow();330331		let parent_id =332			ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Parent)).unwrap();333		let here_id =334			ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Here)).unwrap();335336		if asset_id.clone() == parent_id {337			return Ok(MultiLocation::parent());338		}339340		if asset_id.clone() == here_id {341			return Ok(MultiLocation::new(342				1,343				X1(Parachain(ParachainInfo::get().into())),344			));345		}346347		match <AssetId as TryAsForeing<AssetId, ForeignAssetId>>::try_as_foreing(asset_id.clone()) {348			Some(fid) => match XcmForeignAssetIdMapping::<Runtime>::get_multi_location(fid) {349				Some(location) => Ok(location),350				None => Err(()),351			},352			None => Err(()),353		}354	}355}356357/// Means for transacting assets besides the native currency on this chain.358#[cfg(feature = "foreign-assets")]359pub type FungiblesTransactor = FungiblesAdapter<360	// Use this fungibles implementation:361	ForeingAssets,362	// Use this currency when it is a fungible asset matching the given location or name:363	ConvertedConcreteAssetId<AssetIds, Balance, AsInnerId<AssetIds, JustTry>, JustTry>,364	// Convert an XCM MultiLocation into a local account id:365	LocationToAccountId,366	// Our chain's account ID type (we can't get away without mentioning it explicitly):367	AccountId,368	// We only want to allow teleports of known assets. We use non-zero issuance as an indication369	// that this asset is known.370	NonZeroIssuance<AccountId, ForeingAssets>,371	// The account to use for tracking teleports.372	CheckingAccount,373>;374375/// Means for transacting assets on this chain.376#[cfg(feature = "foreign-assets")]377pub type AssetTransactors = FungiblesTransactor;378379#[cfg(not(feature = "foreign-assets"))]380pub type AssetTransactors = LocalAssetTransactor;381382#[cfg(feature = "foreign-assets")]383pub struct AllAsset;384#[cfg(feature = "foreign-assets")]385impl FilterAssetLocation for AllAsset {386	fn filter_asset_location(asset: &MultiAsset, origin: &MultiLocation) -> bool {387		true388	}389}390391#[cfg(feature = "foreign-assets")]392pub type IsReserve = AllAsset;393#[cfg(not(feature = "foreign-assets"))]394pub type IsReserve = NativeAsset;395396#[cfg(feature = "foreign-assets")]397type Trader<T> = FreeForAll<398	pallet_configuration::WeightToFee<T, Balance>,399	RelayLocation,400	AccountId,401	Balances,402	(),403>;404#[cfg(not(feature = "foreign-assets"))]405type Trader<T> = UsingOnlySelfCurrencyComponents<406	pallet_configuration::WeightToFee<T, Balance>,407	RelayLocation,408	AccountId,409	Balances,410	(),411>;412413pub struct XcmConfig<T>(PhantomData<T>);414impl<T> Config for XcmConfig<T>415where416	T: pallet_configuration::Config,417{418	type Call = Call;419	type XcmSender = XcmRouter;420	// How to withdraw and deposit an asset.421	type AssetTransactor = AssetTransactors;422	type OriginConverter = XcmOriginToTransactDispatchOrigin;423	type IsReserve = IsReserve;424	type IsTeleporter = (); // Teleportation is disabled425	type LocationInverter = LocationInverter<Ancestry>;426	type Barrier = Barrier;427	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;428	type Trader = Trader<T>;429	type ResponseHandler = (); // Don't handle responses for now.430	type SubscriptionService = PolkadotXcm;431432	type AssetTrap = PolkadotXcm;433	type AssetClaims = PolkadotXcm;434}435436impl pallet_xcm::Config for Runtime {437	type Event = Event;438	type SendXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;439	type XcmRouter = XcmRouter;440	type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;441	type XcmExecuteFilter = Everything;442	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;443	type XcmTeleportFilter = Everything;444	type XcmReserveTransferFilter = Everything;445	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;446	type LocationInverter = LocationInverter<Ancestry>;447	type Origin = Origin;448	type Call = Call;449	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;450	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;451}452453impl cumulus_pallet_xcm::Config for Runtime {454	type Event = Event;455	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;456}457458impl cumulus_pallet_xcmp_queue::Config for Runtime {459	type WeightInfo = ();460	type Event = Event;461	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;462	type ChannelInfo = ParachainSystem;463	type VersionWrapper = ();464	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;465	type ControllerOrigin = EnsureRoot<AccountId>;466	type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;467}468469impl cumulus_pallet_dmp_queue::Config for Runtime {470	type Event = Event;471	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;472	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;473}