git.delta.rocks / unique-network / refs/commits / 7a36e4c3fb65

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		tokens::currency::Currency as CurrencyT, OnUnbalanced as OnUnbalancedT, Get, Everything,20	},21	weights::{Weight, WeightToFeePolynomial, WeightToFee},22	parameter_types, match_types,23};24use frame_system::EnsureRoot;25use sp_runtime::{26	traits::{Saturating, CheckedConversion, Zero},27	SaturatedConversion,28};29use pallet_xcm::XcmPassthrough;30use polkadot_parachain::primitives::Sibling;31use xcm::v1::{BodyId, Junction::*, MultiLocation, NetworkId, Junctions::*};32use xcm::latest::{33	AssetId::{Concrete},34	Fungibility::Fungible as XcmFungible,35	MultiAsset, Error as XcmError,36};37use xcm_executor::traits::{MatchesFungible, WeightTrader};38use xcm_builder::{39	AccountId32Aliases, AllowTopLevelPaidExecutionFrom, CurrencyAdapter, EnsureXcmOrigin,40	FixedWeightBounds, LocationInverter, NativeAsset, ParentAsSuperuser, RelayChainAsNative,41	SiblingParachainAsNative, SiblingParachainConvertsVia, SignedAccountId32AsNative,42	SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit, ParentIsPreset,43};44use xcm_executor::{Config, XcmExecutor, Assets};45use sp_std::marker::PhantomData;46use crate::{47	runtime_common::{constants::*, config::substrate::LinearFee},48	Runtime, Call, Event, Origin, Balances, ParachainInfo, ParachainSystem, PolkadotXcm, XcmpQueue,49};50use common_types::{AccountId, Balance};5152parameter_types! {53	pub const RelayLocation: MultiLocation = MultiLocation::parent();54	pub const RelayNetwork: NetworkId = NetworkId::Polkadot;55	pub RelayOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();56	pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();57}5859/// Type for specifying how a `MultiLocation` can be converted into an `AccountId`. This is used60/// when determining ownership of accounts for asset transacting and when attempting to use XCM61/// `Transact` in order to determine the dispatch Origin.62pub type LocationToAccountId = (63	// The parent (Relay-chain) origin converts to the default `AccountId`.64	ParentIsPreset<AccountId>,65	// Sibling parachain origins convert to AccountId via the `ParaId::into`.66	SiblingParachainConvertsVia<Sibling, AccountId>,67	// Straight up local `AccountId32` origins just alias directly to `AccountId`.68	AccountId32Aliases<RelayNetwork, AccountId>,69);7071pub struct OnlySelfCurrency;72impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {73	fn matches_fungible(a: &MultiAsset) -> Option<B> {74		match (&a.id, &a.fun) {75			(Concrete(_), XcmFungible(ref amount)) => CheckedConversion::checked_from(*amount),76			_ => None,77		}78	}79}8081/// Means for transacting assets on this chain.82pub type LocalAssetTransactor = CurrencyAdapter<83	// Use this currency:84	Balances,85	// Use this currency when it is a fungible asset matching the given location or name:86	OnlySelfCurrency,87	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:88	LocationToAccountId,89	// Our chain's account ID type (we can't get away without mentioning it explicitly):90	AccountId,91	// We don't track any teleports.92	(),93>;9495/// No local origins on this chain are allowed to dispatch XCM sends/executions.96pub type LocalOriginToLocation = (SignedToAccountId32<Origin, AccountId, RelayNetwork>,);9798/// The means for routing XCM messages which are not for local execution into the right message99/// queues.100pub type XcmRouter = (101	// Two routers - use UMP to communicate with the relay chain:102	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, ()>,103	// ..and XCMP to communicate with the sibling chains.104	XcmpQueue,105);106107/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,108/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can109/// biases the kind of local `Origin` it will become.110pub type XcmOriginToTransactDispatchOrigin = (111	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location112	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for113	// foreign chains who want to have a local sovereign account on this chain which they control.114	SovereignSignedViaLocation<LocationToAccountId, Origin>,115	// Native converter for Relay-chain (Parent) location; will converts to a `Relay` origin when116	// recognised.117	RelayChainAsNative<RelayOrigin, Origin>,118	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when119	// recognised.120	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,121	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a122	// transaction from the Root origin.123	ParentAsSuperuser<Origin>,124	// Native signed account converter; this just converts an `AccountId32` origin into a normal125	// `Origin::Signed` origin of the same 32-byte value.126	SignedAccountId32AsNative<RelayNetwork, Origin>,127	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.128	XcmPassthrough<Origin>,129);130131parameter_types! {132	// One XCM operation is 1_000_000 weight - almost certainly a conservative estimate.133	pub UnitWeightCost: Weight = 1_000_000;134	// 1200 UNIQUEs buy 1 second of weight.135	pub const WeightPrice: (MultiLocation, u128) = (MultiLocation::parent(), 1_200 * UNIQUE);136	pub const MaxInstructions: u32 = 100;137}138139match_types! {140	pub type ParentOrParentsUnitPlurality: impl Contains<MultiLocation> = {141		MultiLocation { parents: 1, interior: Here } |142		MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Unit, .. }) }143	};144}145146pub type Barrier = (147	TakeWeightCredit,148	AllowTopLevelPaidExecutionFrom<Everything>,149	// ^^^ Parent & its unit plurality gets free execution150);151152pub struct UsingOnlySelfCurrencyComponents<153	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,154	AssetId: Get<MultiLocation>,155	AccountId,156	Currency: CurrencyT<AccountId>,157	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,158>(159	Weight,160	Currency::Balance,161	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,162);163impl<164		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,165		AssetId: Get<MultiLocation>,166		AccountId,167		Currency: CurrencyT<AccountId>,168		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,169	> WeightTrader170	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>171{172	fn new() -> Self {173		Self(0, Zero::zero(), PhantomData)174	}175176	fn buy_weight(&mut self, weight: Weight, payment: Assets) -> Result<Assets, XcmError> {177		let amount = WeightToFee::weight_to_fee(&weight);178		let u128_amount: u128 = amount.try_into().map_err(|_| XcmError::Overflow)?;179180		// location to this parachain through relay chain181		let option1: xcm::v1::AssetId = Concrete(MultiLocation {182			parents: 1,183			interior: X1(Parachain(ParachainInfo::parachain_id().into())),184		});185		// direct location186		let option2: xcm::v1::AssetId = Concrete(MultiLocation {187			parents: 0,188			interior: Here,189		});190191		let required = if payment.fungible.contains_key(&option1) {192			(option1, u128_amount).into()193		} else if payment.fungible.contains_key(&option2) {194			(option2, u128_amount).into()195		} else {196			(Concrete(MultiLocation::default()), u128_amount).into()197		};198199		let unused = payment200			.checked_sub(required)201			.map_err(|_| XcmError::TooExpensive)?;202		self.0 = self.0.saturating_add(weight);203		self.1 = self.1.saturating_add(amount);204		Ok(unused)205	}206207	fn refund_weight(&mut self, weight: Weight) -> Option<MultiAsset> {208		let weight = weight.min(self.0);209		let amount = WeightToFee::weight_to_fee(&weight);210		self.0 -= weight;211		self.1 = self.1.saturating_sub(amount);212		let amount: u128 = amount.saturated_into();213		if amount > 0 {214			Some((AssetId::get(), amount).into())215		} else {216			None217		}218	}219}220impl<221		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,222		AssetId: Get<MultiLocation>,223		AccountId,224		Currency: CurrencyT<AccountId>,225		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,226	> Drop227	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>228{229	fn drop(&mut self) {230		OnUnbalanced::on_unbalanced(Currency::issue(self.1));231	}232}233234pub struct XcmConfig;235impl Config for XcmConfig {236	type Call = Call;237	type XcmSender = XcmRouter;238	// How to withdraw and deposit an asset.239	type AssetTransactor = LocalAssetTransactor;240	type OriginConverter = XcmOriginToTransactDispatchOrigin;241	type IsReserve = NativeAsset;242	type IsTeleporter = (); // Teleportation is disabled243	type LocationInverter = LocationInverter<Ancestry>;244	type Barrier = Barrier;245	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;246	type Trader =247		UsingOnlySelfCurrencyComponents<LinearFee<Balance>, RelayLocation, AccountId, Balances, ()>;248	type ResponseHandler = (); // Don't handle responses for now.249	type SubscriptionService = PolkadotXcm;250251	type AssetTrap = PolkadotXcm;252	type AssetClaims = PolkadotXcm;253}254255impl pallet_xcm::Config for Runtime {256	type Event = Event;257	type SendXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;258	type XcmRouter = XcmRouter;259	type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;260	type XcmExecuteFilter = Everything;261	type XcmExecutor = XcmExecutor<XcmConfig>;262	type XcmTeleportFilter = Everything;263	type XcmReserveTransferFilter = Everything;264	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;265	type LocationInverter = LocationInverter<Ancestry>;266	type Origin = Origin;267	type Call = Call;268	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;269	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;270}271272impl cumulus_pallet_xcm::Config for Runtime {273	type Event = Event;274	type XcmExecutor = XcmExecutor<XcmConfig>;275}276277impl cumulus_pallet_xcmp_queue::Config for Runtime {278	type WeightInfo = ();279	type Event = Event;280	type XcmExecutor = XcmExecutor<XcmConfig>;281	type ChannelInfo = ParachainSystem;282	type VersionWrapper = ();283	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;284	type ControllerOrigin = EnsureRoot<AccountId>;285	type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;286}287288impl cumulus_pallet_dmp_queue::Config for Runtime {289	type Event = Event;290	type XcmExecutor = XcmExecutor<XcmConfig>;291	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;292}