git.delta.rocks / unique-network / refs/commits / 25b276d53c18

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::{traits::Everything, weights::Weight, parameter_types};18use frame_system::EnsureRoot;19use pallet_xcm::XcmPassthrough;20use polkadot_parachain::primitives::Sibling;21use xcm::v1::{Junction::*, MultiLocation, NetworkId};22use xcm::latest::{Instruction, Xcm};23use xcm_builder::{24	AccountId32Aliases, EnsureXcmOrigin, FixedWeightBounds, LocationInverter, ParentAsSuperuser,25	RelayChainAsNative, SiblingParachainAsNative, SiblingParachainConvertsVia,26	SignedAccountId32AsNative, SignedToAccountId32, SovereignSignedViaLocation, ParentIsPreset,27};28use xcm_executor::{Config, XcmExecutor, traits::ShouldExecute};29use sp_std::marker::PhantomData;30use crate::{31	Runtime, Call, Event, Origin, ParachainInfo, ParachainSystem, PolkadotXcm, XcmpQueue,32	xcm_config::Barrier,33};3435use up_common::types::AccountId;3637#[cfg(feature = "foreign-assets")]38mod foreignassets;3940#[cfg(not(feature = "foreign-assets"))]41mod nativeassets;4243#[cfg(feature = "foreign-assets")]44use foreignassets as xcm_assets;4546#[cfg(not(feature = "foreign-assets"))]47use nativeassets as xcm_assets;4849use xcm_assets::{AssetTransactors, IsReserve, Trader};5051parameter_types! {52	pub const RelayLocation: MultiLocation = MultiLocation::parent();53	pub const RelayNetwork: NetworkId = NetworkId::Polkadot;54	pub RelayOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();55	pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();56}5758/// Type for specifying how a `MultiLocation` can be converted into an `AccountId`. This is used59/// when determining ownership of accounts for asset transacting and when attempting to use XCM60/// `Transact` in order to determine the dispatch Origin.61pub type LocationToAccountId = (62	// The parent (Relay-chain) origin converts to the default `AccountId`.63	ParentIsPreset<AccountId>,64	// Sibling parachain origins convert to AccountId via the `ParaId::into`.65	SiblingParachainConvertsVia<Sibling, AccountId>,66	// Straight up local `AccountId32` origins just alias directly to `AccountId`.67	AccountId32Aliases<RelayNetwork, AccountId>,68);6970/// No local origins on this chain are allowed to dispatch XCM sends/executions.71pub type LocalOriginToLocation = (SignedToAccountId32<Origin, AccountId, RelayNetwork>,);7273/// The means for routing XCM messages which are not for local execution into the right message74/// queues.75pub type XcmRouter = (76	// Two routers - use UMP to communicate with the relay chain:77	cumulus_primitives_utility::ParentAsUmp<ParachainSystem, ()>,78	// ..and XCMP to communicate with the sibling chains.79	XcmpQueue,80);8182/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,83/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can84/// biases the kind of local `Origin` it will become.85pub type XcmOriginToTransactDispatchOrigin = (86	// Sovereign account converter; this attempts to derive an `AccountId` from the origin location87	// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for88	// foreign chains who want to have a local sovereign account on this chain which they control.89	SovereignSignedViaLocation<LocationToAccountId, Origin>,90	// Native converter for Relay-chain (Parent) location; will converts to a `Relay` origin when91	// recognised.92	RelayChainAsNative<RelayOrigin, Origin>,93	// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when94	// recognised.95	SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,96	// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a97	// transaction from the Root origin.98	ParentAsSuperuser<Origin>,99	// Native signed account converter; this just converts an `AccountId32` origin into a normal100	// `Origin::Signed` origin of the same 32-byte value.101	SignedAccountId32AsNative<RelayNetwork, Origin>,102	// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.103	XcmPassthrough<Origin>,104);105106parameter_types! {107	// One XCM operation is 1_000_000 weight - almost certainly a conservative estimate.108	pub UnitWeightCost: Weight = 1_000_000;109	pub const MaxInstructions: u32 = 100;110}111112pub trait TryPass {113	fn try_pass<Call>(origin: &MultiLocation, message: &mut Xcm<Call>) -> Result<(), ()>;114}115116#[impl_trait_for_tuples::impl_for_tuples(30)]117impl TryPass for Tuple {118	fn try_pass<Call>(origin: &MultiLocation, message: &mut Xcm<Call>) -> Result<(), ()> {119		for_tuples!( #(120			Tuple::try_pass(origin, message)?;121		)* );122123		Ok(())124	}125}126127pub struct DenyTransact;128impl TryPass for DenyTransact {129	fn try_pass<Call>(_origin: &MultiLocation, message: &mut Xcm<Call>) -> Result<(), ()> {130		let transact_inst = message131			.0132			.iter()133			.find(|inst| matches![inst, Instruction::Transact { .. }]);134135		match transact_inst {136			Some(_) => {137				log::warn!(138					target: "xcm::barrier",139					"transact XCM rejected"140				);141142				Err(())143			}144			None => Ok(()),145		}146	}147}148149/// Deny executing the XCM if it matches any of the Deny filter regardless of anything else.150/// If it passes the Deny, and matches one of the Allow cases then it is let through.151pub struct DenyThenTry<Deny, Allow>(PhantomData<Deny>, PhantomData<Allow>)152where153	Deny: TryPass,154	Allow: ShouldExecute;155156impl<Deny, Allow> ShouldExecute for DenyThenTry<Deny, Allow>157where158	Deny: TryPass,159	Allow: ShouldExecute,160{161	fn should_execute<Call>(162		origin: &MultiLocation,163		message: &mut Xcm<Call>,164		max_weight: Weight,165		weight_credit: &mut Weight,166	) -> Result<(), ()> {167		Deny::try_pass(origin, message)?;168		Allow::should_execute(origin, message, max_weight, weight_credit)169	}170}171172pub struct XcmConfig<T>(PhantomData<T>);173impl<T> Config for XcmConfig<T>174where175	T: pallet_configuration::Config,176{177	type Call = Call;178	type XcmSender = XcmRouter;179	// How to withdraw and deposit an asset.180	type AssetTransactor = AssetTransactors;181	type OriginConverter = XcmOriginToTransactDispatchOrigin;182	type IsReserve = IsReserve;183	type IsTeleporter = (); // Teleportation is disabled184	type LocationInverter = LocationInverter<Ancestry>;185	type Barrier = Barrier;186	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;187	type Trader = Trader<T>;188	type ResponseHandler = (); // Don't handle responses for now.189	type SubscriptionService = PolkadotXcm;190191	type AssetTrap = PolkadotXcm;192	type AssetClaims = PolkadotXcm;193}194195impl pallet_xcm::Config for Runtime {196	type Event = Event;197	type SendXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;198	type XcmRouter = XcmRouter;199	type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;200	type XcmExecuteFilter = Everything;201	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;202	type XcmTeleportFilter = Everything;203	type XcmReserveTransferFilter = Everything;204	type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;205	type LocationInverter = LocationInverter<Ancestry>;206	type Origin = Origin;207	type Call = Call;208	const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;209	type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;210}211212impl cumulus_pallet_xcm::Config for Runtime {213	type Event = Event;214	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;215}216217impl cumulus_pallet_xcmp_queue::Config for Runtime {218	type WeightInfo = ();219	type Event = Event;220	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;221	type ChannelInfo = ParachainSystem;222	type VersionWrapper = ();223	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;224	type ControllerOrigin = EnsureRoot<AccountId>;225	type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;226}227228impl cumulus_pallet_dmp_queue::Config for Runtime {229	type Event = Event;230	type XcmExecutor = XcmExecutor<XcmConfig<Self>>;231	type ExecuteOverweightOrigin = frame_system::EnsureRoot<AccountId>;232}