git.delta.rocks / unique-network / refs/commits / fb3fa28b0be8

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, Call, Event, Origin, Balances, ParachainInfo, ParachainSystem, PolkadotXcm, XcmpQueue,48};49use up_common::{50	types::{AccountId, Balance},51	constants::*,52};5354parameter_types! {55	pub const RelayLocation: MultiLocation = MultiLocation::parent();56	pub const RelayNetwork: NetworkId = NetworkId::Polkadot;57	pub RelayOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();58	pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();59}6061/// Type for specifying how a `MultiLocation` can be converted into an `AccountId`. This is used62/// when determining ownership of accounts for asset transacting and when attempting to use XCM63/// `Transact` in order to determine the dispatch Origin.64pub type LocationToAccountId = (65	// The parent (Relay-chain) origin converts to the default `AccountId`.66	ParentIsPreset<AccountId>,67	// Sibling parachain origins convert to AccountId via the `ParaId::into`.68	SiblingParachainConvertsVia<Sibling, AccountId>,69	// Straight up local `AccountId32` origins just alias directly to `AccountId`.70	AccountId32Aliases<RelayNetwork, AccountId>,71);7273pub struct OnlySelfCurrency;74impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {75	fn matches_fungible(a: &MultiAsset) -> Option<B> {76		match (&a.id, &a.fun) {77			(Concrete(_), XcmFungible(ref amount)) => CheckedConversion::checked_from(*amount),78			_ => None,79		}80	}81}8283/// Means for transacting assets on this chain.84pub type LocalAssetTransactor = CurrencyAdapter<85	// Use this currency:86	Balances,87	// Use this currency when it is a fungible asset matching the given location or name:88	OnlySelfCurrency,89	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:90	LocationToAccountId,91	// Our chain's account ID type (we can't get away without mentioning it explicitly):92	AccountId,93	// We don't track any teleports.94	(),95>;9697/// No local origins on this chain are allowed to dispatch XCM sends/executions.98pub type LocalOriginToLocation = (SignedToAccountId32<Origin, AccountId, RelayNetwork>,);99100/// The means for routing XCM messages which are not for local execution into the right message101/// queues.102pub type XcmRouter = (103	// Two routers - use UMP to communicate with the relay chain:104	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, ()>,105	// ..and XCMP to communicate with the sibling chains.106	XcmpQueue,107);108109/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,110/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can111/// biases the kind of local `Origin` it will become.112pub type XcmOriginToTransactDispatchOrigin = (113	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location114	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for115	// foreign chains who want to have a local sovereign account on this chain which they control.116	SovereignSignedViaLocation<LocationToAccountId, Origin>,117	// Native converter for Relay-chain (Parent) location; will converts to a `Relay` origin when118	// recognised.119	RelayChainAsNative<RelayOrigin, Origin>,120	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when121	// recognised.122	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,123	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a124	// transaction from the Root origin.125	ParentAsSuperuser<Origin>,126	// Native signed account converter; this just converts an `AccountId32` origin into a normal127	// `Origin::Signed` origin of the same 32-byte value.128	SignedAccountId32AsNative<RelayNetwork, Origin>,129	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.130	XcmPassthrough<Origin>,131);132133parameter_types! {134	// One XCM operation is 1_000_000 weight - almost certainly a conservative estimate.135	pub UnitWeightCost: Weight = 1_000_000;136	// 1200 UNIQUEs buy 1 second of weight.137	pub const WeightPrice: (MultiLocation, u128) = (MultiLocation::parent(), 1_200 * UNIQUE);138	pub const MaxInstructions: u32 = 100;139}140141match_types! {142	pub type ParentOrParentsUnitPlurality: impl Contains<MultiLocation> = {143		MultiLocation { parents: 1, interior: Here } |144		MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Unit, .. }) }145	};146}147148pub type Barrier = (149	TakeWeightCredit,150	AllowTopLevelPaidExecutionFrom<Everything>,151	// ^^^ Parent & its unit plurality gets free execution152);153154pub struct UsingOnlySelfCurrencyComponents<155	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,156	AssetId: Get<MultiLocation>,157	AccountId,158	Currency: CurrencyT<AccountId>,159	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,160>(161	Weight,162	Currency::Balance,163	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,164);165impl<166		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,167		AssetId: Get<MultiLocation>,168		AccountId,169		Currency: CurrencyT<AccountId>,170		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,171	> WeightTrader172	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>173{174	fn new() -> Self {175		Self(0, Zero::zero(), PhantomData)176	}177178	fn buy_weight(&mut self, weight: Weight, payment: Assets) -> Result<Assets, XcmError> {179		let amount = WeightToFee::weight_to_fee(&weight);180		let u128_amount: u128 = amount.try_into().map_err(|_| XcmError::Overflow)?;181182		// location to this parachain through relay chain183		let option1: xcm::v1::AssetId = Concrete(MultiLocation {184			parents: 1,185			interior: X1(Parachain(ParachainInfo::parachain_id().into())),186		});187		// direct location188		let option2: xcm::v1::AssetId = Concrete(MultiLocation {189			parents: 0,190			interior: Here,191		});192193		let required = if payment.fungible.contains_key(&option1) {194			(option1, u128_amount).into()195		} else if payment.fungible.contains_key(&option2) {196			(option2, u128_amount).into()197		} else {198			(Concrete(MultiLocation::default()), u128_amount).into()199		};200201		let unused = payment202			.checked_sub(required)203			.map_err(|_| XcmError::TooExpensive)?;204		self.0 = self.0.saturating_add(weight);205		self.1 = self.1.saturating_add(amount);206		Ok(unused)207	}208209	fn refund_weight(&mut self, weight: Weight) -> Option<MultiAsset> {210		let weight = weight.min(self.0);211		let amount = WeightToFee::weight_to_fee(&weight);212		self.0 -= weight;213		self.1 = self.1.saturating_sub(amount);214		let amount: u128 = amount.saturated_into();215		if amount > 0 {216			Some((AssetId::get(), amount).into())217		} else {218			None219		}220	}221}222impl<223		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,224		AssetId: Get<MultiLocation>,225		AccountId,226		Currency: CurrencyT<AccountId>,227		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,228	> Drop229	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>230{231	fn drop(&mut self) {232		OnUnbalanced::on_unbalanced(Currency::issue(self.1));233	}234}235236pub struct XcmConfig<T>(PhantomData<T>);237impl<T> Config for XcmConfig<T>238where239	T: pallet_configuration::Config,240{241	type Call = Call;242	type XcmSender = XcmRouter;243	// How to withdraw and deposit an asset.244	type AssetTransactor = LocalAssetTransactor;245	type OriginConverter = XcmOriginToTransactDispatchOrigin;246	type IsReserve = NativeAsset;247	type IsTeleporter = (); // Teleportation is disabled248	type LocationInverter = LocationInverter<Ancestry>;249	type Barrier = Barrier;250	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;251	type Trader = UsingOnlySelfCurrencyComponents<252		pallet_configuration::WeightToFee<T, Balance>,253		RelayLocation,254		AccountId,255		Balances,256		(),257	>;258	type ResponseHandler = (); // Don't handle responses for now.259	type SubscriptionService = PolkadotXcm;260261	type AssetTrap = PolkadotXcm;262	type AssetClaims = PolkadotXcm;263}264265impl pallet_xcm::Config for Runtime {266	type Event = Event;267	type SendXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;268	type XcmRouter = XcmRouter;269	type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;270	type XcmExecuteFilter = Everything;271	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;272	type XcmTeleportFilter = Everything;273	type XcmReserveTransferFilter = Everything;274	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;275	type LocationInverter = LocationInverter<Ancestry>;276	type Origin = Origin;277	type Call = Call;278	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;279	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;280}281282impl cumulus_pallet_xcm::Config for Runtime {283	type Event = Event;284	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;285}286287impl cumulus_pallet_xcmp_queue::Config for Runtime {288	type WeightInfo = ();289	type Event = Event;290	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;291	type ChannelInfo = ParachainSystem;292	type VersionWrapper = ();293	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;294	type ControllerOrigin = EnsureRoot<AccountId>;295	type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;296}297298impl cumulus_pallet_dmp_queue::Config for Runtime {299	type Event = Event;300	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;301	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;302}