git.delta.rocks / unique-network / refs/commits / 0b95edb08466

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	ConvertedConcreteAssetId44};45use xcm_executor::{Config, XcmExecutor, Assets};46use xcm_executor::traits::{Convert as ConvertXcm, JustTry, MatchesFungible, WeightTrader, FilterAssetLocation};47use pallet_foreing_assets::{48	AssetIds, AssetIdMapping, XcmForeignAssetIdMapping, CurrencyId, NativeCurrency,49	UsingAnyCurrencyComponents, TryAsForeing, ForeignAssetId,50};51use sp_std::{borrow::Borrow, marker::PhantomData, vec, vec::Vec};52use crate::{53	Runtime, Call, Event, Origin, Balances, ParachainInfo, ParachainSystem, PolkadotXcm, XcmpQueue,54	xcm_config::Barrier55};56#[cfg(feature = "foreign-assets")]57use crate::ForeingAssets;5859use up_common::{60	types::{AccountId, Balance},61	constants::*,62};6364parameter_types! {65	pub const RelayLocation: MultiLocation = MultiLocation::parent();66	pub const RelayNetwork: NetworkId = NetworkId::Polkadot;67	pub RelayOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();68	pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();69}7071/// Type for specifying how a `MultiLocation` can be converted into an `AccountId`. This is used72/// when determining ownership of accounts for asset transacting and when attempting to use XCM73/// `Transact` in order to determine the dispatch Origin.74pub type LocationToAccountId = (75	// The parent (Relay-chain) origin converts to the default `AccountId`.76	ParentIsPreset<AccountId>,77	// Sibling parachain origins convert to AccountId via the `ParaId::into`.78	SiblingParachainConvertsVia<Sibling, AccountId>,79	// Straight up local `AccountId32` origins just alias directly to `AccountId`.80	AccountId32Aliases<RelayNetwork, AccountId>,81);8283pub struct OnlySelfCurrency;84impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {85	fn matches_fungible(a: &MultiAsset) -> Option<B> {86		match (&a.id, &a.fun) {87			(Concrete(_), XcmFungible(ref amount)) => CheckedConversion::checked_from(*amount),88			_ => None,89		}90	}91}9293/// Means for transacting assets on this chain.94pub type LocalAssetTransactor = CurrencyAdapter<95	// Use this currency:96	Balances,97	// Use this currency when it is a fungible asset matching the given location or name:98	OnlySelfCurrency,99	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:100	LocationToAccountId,101	// Our chain's account ID type (we can't get away without mentioning it explicitly):102	AccountId,103	// We don't track any teleports.104	(),105>;106107/// No local origins on this chain are allowed to dispatch XCM sends/executions.108pub type LocalOriginToLocation = (SignedToAccountId32<Origin, AccountId, RelayNetwork>,);109110/// The means for routing XCM messages which are not for local execution into the right message111/// queues.112pub type XcmRouter = (113	// Two routers - use UMP to communicate with the relay chain:114	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, ()>,115	// ..and XCMP to communicate with the sibling chains.116	XcmpQueue,117);118119/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,120/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can121/// biases the kind of local `Origin` it will become.122pub type XcmOriginToTransactDispatchOrigin = (123	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location124	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for125	// foreign chains who want to have a local sovereign account on this chain which they control.126	SovereignSignedViaLocation<LocationToAccountId, Origin>,127	// Native converter for Relay-chain (Parent) location; will converts to a `Relay` origin when128	// recognised.129	RelayChainAsNative<RelayOrigin, Origin>,130	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when131	// recognised.132	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,133	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a134	// transaction from the Root origin.135	ParentAsSuperuser<Origin>,136	// Native signed account converter; this just converts an `AccountId32` origin into a normal137	// `Origin::Signed` origin of the same 32-byte value.138	SignedAccountId32AsNative<RelayNetwork, Origin>,139	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.140	XcmPassthrough<Origin>,141);142143parameter_types! {144	// One XCM operation is 1_000_000 weight - almost certainly a conservative estimate.145	pub UnitWeightCost: Weight = 1_000_000;146	// 1200 UNIQUEs buy 1 second of weight.147	pub const WeightPrice: (MultiLocation, u128) = (MultiLocation::parent(), 1_200 * UNIQUE);148	pub const MaxInstructions: u32 = 100;149}150151match_types! {152	pub type ParentOrParentsUnitPlurality: impl Contains<MultiLocation> = {153		MultiLocation { parents: 1, interior: Here } |154		MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Unit, .. }) }155	};156}157158/*159pub type Barrier = (160	TakeWeightCredit,161	AllowTopLevelPaidExecutionFrom<Everything>,162	// ^^^ Parent & its unit plurality gets free execution163);164 */165166pub struct UsingOnlySelfCurrencyComponents<167	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,168	AssetId: Get<MultiLocation>,169	AccountId,170	Currency: CurrencyT<AccountId>,171	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,172>(173	Weight,174	Currency::Balance,175	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,176);177impl<178		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,179		AssetId: Get<MultiLocation>,180		AccountId,181		Currency: CurrencyT<AccountId>,182		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,183	> WeightTrader184	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>185{186	fn new() -> Self {187		Self(0, Zero::zero(), PhantomData)188	}189190	fn buy_weight(&mut self, weight: Weight, payment: Assets) -> Result<Assets, XcmError> {191		let amount = WeightToFee::weight_to_fee(&weight);192		let u128_amount: u128 = amount.try_into().map_err(|_| XcmError::Overflow)?;193194		// location to this parachain through relay chain195		let option1: xcm::v1::AssetId = Concrete(MultiLocation {196			parents: 1,197			interior: X1(Parachain(ParachainInfo::parachain_id().into())),198		});199		// direct location200		let option2: xcm::v1::AssetId = Concrete(MultiLocation {201			parents: 0,202			interior: Here,203		});204205		let required = if payment.fungible.contains_key(&option1) {206			(option1, u128_amount).into()207		} else if payment.fungible.contains_key(&option2) {208			(option2, u128_amount).into()209		} else {210			(Concrete(MultiLocation::default()), u128_amount).into()211		};212213		let unused = payment214			.checked_sub(required)215			.map_err(|_| XcmError::TooExpensive)?;216		self.0 = self.0.saturating_add(weight);217		self.1 = self.1.saturating_add(amount);218		Ok(unused)219	}220221	fn refund_weight(&mut self, weight: Weight) -> Option<MultiAsset> {222		let weight = weight.min(self.0);223		let amount = WeightToFee::weight_to_fee(&weight);224		self.0 -= weight;225		self.1 = self.1.saturating_sub(amount);226		let amount: u128 = amount.saturated_into();227		if amount > 0 {228			Some((AssetId::get(), amount).into())229		} else {230			None231		}232	}233}234impl<235		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,236		AssetId: Get<MultiLocation>,237		AccountId,238		Currency: CurrencyT<AccountId>,239		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,240	> Drop241	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>242{243	fn drop(&mut self) {244		OnUnbalanced::on_unbalanced(Currency::issue(self.1));245	}246}247248parameter_types! {249	pub CheckingAccount: AccountId = PolkadotXcm::check_account();250}251/// Allow checking in assets that have issuance > 0.252#[cfg(feature = "foreign-assets")]253pub struct NonZeroIssuance<AccountId, ForeingAssets>(PhantomData<(AccountId, ForeingAssets)>);254255#[cfg(feature = "foreign-assets")]256impl<AccountId, ForeingAssets> Contains<<ForeingAssets as fungibles::Inspect<AccountId>>::AssetId>257for NonZeroIssuance<AccountId, ForeingAssets>258	where259		ForeingAssets: fungibles::Inspect<AccountId>,260{261	fn contains(id: &<ForeingAssets as fungibles::Inspect<AccountId>>::AssetId) -> bool {262		!ForeingAssets::total_issuance(*id).is_zero()263	}264}265266#[cfg(feature = "foreign-assets")]267pub struct AsInnerId<AssetId, ConvertAssetId>(PhantomData<(AssetId, ConvertAssetId)>);268#[cfg(feature = "foreign-assets")]269impl<AssetId: Clone + PartialEq, ConvertAssetId: ConvertXcm<AssetId, AssetId>>270ConvertXcm<MultiLocation, AssetId> for AsInnerId<AssetId, ConvertAssetId>271	where272		AssetId: Borrow<AssetId>,273		AssetId: TryAsForeing<AssetId, ForeignAssetId>,274		AssetIds: Borrow<AssetId>,275{276	fn convert_ref(id: impl Borrow<MultiLocation>) -> Result<AssetId, ()> {277		let id = id.borrow();278279		log::trace!(280			target: "xcm::AsInnerId::Convert",281			"AsInnerId {:?}",282			id283		);284285		let parent = MultiLocation::parent();286		let here = MultiLocation::here();287		let self_location = MultiLocation::new(1, X1(Parachain(ParachainInfo::get().into())));288289		if *id == parent {290			return ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Parent));291		}292293		if *id == here || *id == self_location {294			return ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Here));295		}296297		match XcmForeignAssetIdMapping::<Runtime>::get_currency_id(id.clone()) {298			Some(AssetIds::ForeignAssetId(foreign_asset_id)) => {299				ConvertAssetId::convert_ref(AssetIds::ForeignAssetId(foreign_asset_id))300			}301			_ => ConvertAssetId::convert_ref(AssetIds::ForeignAssetId(0)),302		}303	}304305	fn reverse_ref(what: impl Borrow<AssetId>) -> Result<MultiLocation, ()> {306		log::trace!(307			target: "xcm::AsInnerId::Reverse",308			"AsInnerId",309		);310311		let asset_id = what.borrow();312313		let parent_id =314			ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Parent)).unwrap();315		let here_id =316			ConvertAssetId::convert_ref(AssetIds::NativeAssetId(NativeCurrency::Here)).unwrap();317318		if asset_id.clone() == parent_id {319			return Ok(MultiLocation::parent());320		}321322		if asset_id.clone() == here_id {323			return Ok(MultiLocation::new(324				1,325				X1(Parachain(ParachainInfo::get().into())),326			));327		}328329		match <AssetId as TryAsForeing<AssetId, ForeignAssetId>>::try_as_foreing(asset_id.clone()) {330			Some(fid) => match XcmForeignAssetIdMapping::<Runtime>::get_multi_location(fid) {331				Some(location) => Ok(location),332				None => Err(()),333			},334			None => Err(()),335		}336	}337}338339/// Means for transacting assets besides the native currency on this chain.340#[cfg(feature = "foreign-assets")]341pub type FungiblesTransactor = FungiblesAdapter<342	// Use this fungibles implementation:343	ForeingAssets,344	// Use this currency when it is a fungible asset matching the given location or name:345	ConvertedConcreteAssetId<AssetIds, Balance, AsInnerId<AssetIds, JustTry>, JustTry>,346	// Convert an XCM MultiLocation into a local account id:347	LocationToAccountId,348	// Our chain's account ID type (we can't get away without mentioning it explicitly):349	AccountId,350	// We only want to allow teleports of known assets. We use non-zero issuance as an indication351	// that this asset is known.352	NonZeroIssuance<AccountId, ForeingAssets>,353	// The account to use for tracking teleports.354	CheckingAccount,355>;356357/// Means for transacting assets on this chain.358#[cfg(feature = "foreign-assets")]359pub type AssetTransactors = FungiblesTransactor;360361#[cfg(not(feature = "foreign-assets"))]362pub type AssetTransactors = LocalAssetTransactor;363364#[cfg(feature = "foreign-assets")]365pub struct AllAsset;366#[cfg(feature = "foreign-assets")]367impl FilterAssetLocation for AllAsset {368	fn filter_asset_location(asset: &MultiAsset, origin: &MultiLocation) -> bool {369		true370	}371}372373#[cfg(feature = "foreign-assets")]374pub type IsReserve = AllAsset;375#[cfg(not(feature = "foreign-assets"))]376pub type IsReserve = NativeAsset;377378#[cfg(feature = "foreign-assets")]379type Trader<T> =380	UsingAnyCurrencyComponents<381		pallet_configuration::WeightToFee<T, Balance>,382		RelayLocation, AccountId, Balances, ()>;383#[cfg(not(feature = "foreign-assets"))]384type Trader<T> = UsingOnlySelfCurrencyComponents<385	pallet_configuration::WeightToFee<T, Balance>,386	RelayLocation,387	AccountId,388	Balances,389	(),390>;391392pub struct XcmConfig<T>(PhantomData<T>);393impl<T> Config for XcmConfig<T>394where395	T: pallet_configuration::Config,396{397	type Call = Call;398	type XcmSender = XcmRouter;399	// How to withdraw and deposit an asset.400	type AssetTransactor = AssetTransactors;401	type OriginConverter = XcmOriginToTransactDispatchOrigin;402	type IsReserve = IsReserve;403	type IsTeleporter = (); // Teleportation is disabled404	type LocationInverter = LocationInverter<Ancestry>;405	type Barrier = Barrier;406	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;407	type Trader = Trader<T>;408	type ResponseHandler = (); // Don't handle responses for now.409	type SubscriptionService = PolkadotXcm;410411	type AssetTrap = PolkadotXcm;412	type AssetClaims = PolkadotXcm;413}414415impl pallet_xcm::Config for Runtime {416	type Event = Event;417	type SendXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;418	type XcmRouter = XcmRouter;419	type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;420	type XcmExecuteFilter = Everything;421	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;422	type XcmTeleportFilter = Everything;423	type XcmReserveTransferFilter = Everything;424	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;425	type LocationInverter = LocationInverter<Ancestry>;426	type Origin = Origin;427	type Call = Call;428	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;429	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;430}431432impl cumulus_pallet_xcm::Config for Runtime {433	type Event = Event;434	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;435}436437impl cumulus_pallet_xcmp_queue::Config for Runtime {438	type WeightInfo = ();439	type Event = Event;440	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;441	type ChannelInfo = ParachainSystem;442	type VersionWrapper = ();443	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;444	type ControllerOrigin = EnsureRoot<AccountId>;445	type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;446}447448impl cumulus_pallet_dmp_queue::Config for Runtime {449	type Event = Event;450	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;451	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;452}453