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// Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Cumulus.
// Cumulus is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Cumulus is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Cumulus. If not, see <http://www.gnu.org/licenses/>.
//! Holds the XCM specific configuration that would otherwise be in lib.rs
//!
//! This configuration dictates how the Penpal chain will communicate with other chains.
//!
//! One of the main uses of the penpal chain will be to be a benefactor of reserve asset transfers
//! with Asset Hub as the reserve. At present no derivative tokens are minted on receipt of a
//! `ReserveAssetTransferDeposited` message but that will but the intension will be to support this
//! soon.
AccountId, AllPalletsWithSystem, AssetId as AssetIdPalletAssets, Assets, Balance, Balances,
ForeignAssets, ParachainInfo, ParachainSystem, PolkadotXcm, Runtime, RuntimeCall, RuntimeEvent,
RuntimeOrigin, WeightToFee, XcmpQueue,
};
use core::marker::PhantomData;
use frame_support::{
fungibles::{self, Balanced, Credit},
ConstU32, Contains, ContainsPair, Everything, Get, Nothing,
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use pallet_assets::Instance1;
use polkadot_parachain_primitives::primitives::Sibling;
use polkadot_runtime_common::impls::ToAuthor;
use sp_runtime::traits::Zero;
use testnet_parachains_constants::rococo::snowbridge::EthereumNetwork;
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use xcm::latest::prelude::*;
AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
AllowSubscriptionsFrom, AllowTopLevelPaidExecutionFrom, AsPrefixedGeneralIndex,
ConvertedConcreteId, CurrencyAdapter, DenyReserveTransferToRelayChain, DenyThenTry,
EnsureXcmOrigin, FixedWeightBounds, FrameTransactionalProcessor, FungiblesAdapter, IsConcrete,
LocalMint, NativeAsset, NoChecking, ParentAsSuperuser, ParentIsPreset, RelayChainAsNative,
SiblingParachainAsNative, SiblingParachainConvertsVia, SignedAccountId32AsNative,
SignedToAccountId32, SovereignSignedViaLocation, StartsWith, TakeWeightCredit,
TrailingSetTopicAsId, UsingComponents, WithComputedOrigin, WithUniqueTopic,
pub const RelayLocation: Location = Location::parent();
pub RelayChainOrigin: RuntimeOrigin = cumulus_pallet_xcm::Origin::Relay.into();
pub UniversalLocation: InteriorLocation = [Parachain(ParachainInfo::parachain_id().into())].into();
/// Type for specifying how a `Location` can be converted into an `AccountId`. This is used
/// when determining ownership of accounts for asset transacting and when attempting to use XCM
/// `Transact` in order to determine the dispatch Origin.
pub type LocationToAccountId = (
// The parent (Relay-chain) origin converts to the parent `AccountId`.
ParentIsPreset<AccountId>,
// Sibling parachain origins convert to AccountId via the `ParaId::into`.
SiblingParachainConvertsVia<Sibling, AccountId>,
// Straight up local `AccountId32` origins just alias directly to `AccountId`.
AccountId32Aliases<RelayNetwork, AccountId>,
);
/// Means for transacting assets on this chain.
pub type CurrencyTransactor = CurrencyAdapter<
// Use this currency:
Balances,
// Use this currency when it is a fungible asset matching the given location or name:
IsConcrete<RelayLocation>,
// Do a simple punn to convert an AccountId32 Location into a native chain account ID:
LocationToAccountId,
// Our chain's account ID type (we can't get away without mentioning it explicitly):
AccountId,
// We don't track any teleports.
(),
>;
/// Means for transacting assets besides the native currency on this chain.
pub type FungiblesTransactor = FungiblesAdapter<
// Use this fungibles implementation:
Assets,
// Use this currency when it is a fungible asset matching the given location or name:
(
ConvertedConcreteId<
AssetIdPalletAssets,
Balance,
AsPrefixedGeneralIndex<AssetsPalletLocation, AssetIdPalletAssets, JustTry>,
JustTry,
>,
ConvertedConcreteId<
AssetIdPalletAssets,
Balance,
AsPrefixedGeneralIndex<
SystemAssetHubAssetsPalletLocation,
AssetIdPalletAssets,
JustTry,
>,
JustTry,
>,
),
LocationToAccountId,
// Our chain's account ID type (we can't get away without mentioning it explicitly):
AccountId,
// We only want to allow teleports of known assets. We use non-zero issuance as an indication
// that this asset is known.
// The account to use for tracking teleports.
CheckingAccount,
>;
/// `AssetId/Balance` converter for `TrustBackedAssets`
pub type ForeignAssetsConvertedConcreteId =
assets_common::ForeignAssetsConvertedConcreteId<StartsWith<RelayLocation>, Balance>;
/// Means for transacting foreign assets from different global consensus.
pub type ForeignFungiblesTransactor = FungiblesAdapter<
// Use this fungibles implementation:
ForeignAssets,
// Use this currency when it is a fungible asset matching the given location or name:
ForeignAssetsConvertedConcreteId,
// Convert an XCM MultiLocation into a local account id:
LocationToAccountId,
// Our chain's account ID type (we can't get away without mentioning it explicitly):
AccountId,
// We dont need to check teleports here.
NoChecking,
// The account to use for tracking teleports.
CheckingAccount,
>;
/// Means for transacting assets on this chain.
pub type AssetTransactors = (CurrencyTransactor, ForeignFungiblesTransactor, FungiblesTransactor);
/// This is the type we use to convert an (incoming) XCM origin into a local `Origin` instance,
/// ready for dispatching a transaction with Xcm's `Transact`. There is an `OriginKind` which can
/// biases the kind of local `Origin` it will become.
pub type XcmOriginToTransactDispatchOrigin = (
// Sovereign account converter; this attempts to derive an `AccountId` from the origin location
// using `LocationToAccountId` and then turn that into the usual `Signed` origin. Useful for
// foreign chains who want to have a local sovereign account on this chain which they control.
SovereignSignedViaLocation<LocationToAccountId, RuntimeOrigin>,
// Native converter for Relay-chain (Parent) location; will convert to a `Relay` origin when
RelayChainAsNative<RelayChainOrigin, RuntimeOrigin>,
// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when
// recognized.
SiblingParachainAsNative<cumulus_pallet_xcm::Origin, RuntimeOrigin>,
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// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a
// transaction from the Root origin.
ParentAsSuperuser<RuntimeOrigin>,
// Native signed account converter; this just converts an `AccountId32` origin into a normal
// `RuntimeOrigin::Signed` origin of the same 32-byte value.
SignedAccountId32AsNative<RelayNetwork, RuntimeOrigin>,
// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.
);
parameter_types! {
// One XCM operation is 1_000_000_000 weight - almost certainly a conservative estimate.
pub UnitWeightCost: Weight = Weight::from_parts(1_000_000_000, 64 * 1024);
pub struct ParentOrParentsExecutivePlurality;
impl Contains<Location> for ParentOrParentsExecutivePlurality {
fn contains(location: &Location) -> bool {
matches!(location.unpack(), (1, []) | (1, [Plurality { id: BodyId::Executive, .. }]))
}
}
pub struct CommonGoodAssetsParachain;
impl Contains<Location> for CommonGoodAssetsParachain {
fn contains(location: &Location) -> bool {
matches!(location.unpack(), (1, [Parachain(1000)]))
}
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pub type Barrier = TrailingSetTopicAsId<
DenyThenTry<
DenyReserveTransferToRelayChain,
(
TakeWeightCredit,
// Expected responses are OK.
AllowKnownQueryResponses<PolkadotXcm>,
// Allow XCMs with some computed origins to pass through.
WithComputedOrigin<
(
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// If the message is one that immediately attempts to pay for execution, then
// allow it.
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AllowTopLevelPaidExecutionFrom<Everything>,
// System Assets parachain, parent and its exec plurality get free
// execution
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AllowExplicitUnpaidExecutionFrom<(
CommonGoodAssetsParachain,
ParentOrParentsExecutivePlurality,
)>,
// Subscriptions for version tracking are OK.
AllowSubscriptionsFrom<Everything>,
),
UniversalLocation,
ConstU32<8>,
>,
),
>,
>;
/// Type alias to conveniently refer to `frame_system`'s `Config::AccountId`.
pub type AccountIdOf<R> = <R as frame_system::Config>::AccountId;
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/// Asset filter that allows all assets from a certain location matching asset id.
pub struct AssetPrefixFrom<Prefix, Origin>(PhantomData<(Prefix, Origin)>);
impl<Prefix, Origin> ContainsPair<Asset, Location> for AssetPrefixFrom<Prefix, Origin>
fn contains(asset: &Asset, origin: &Location) -> bool {
matches!(asset, Asset { id: AssetId(asset_loc), fun: Fungible(_a) }
if asset_loc.starts_with(&Prefix::get()))
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}
}
type AssetsFrom<T> = AssetPrefixFrom<T, T>;
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/// Asset filter that allows native/relay asset if coming from a certain location.
pub struct NativeAssetFrom<T>(PhantomData<T>);
impl<T: Get<Location>> ContainsPair<Asset, Location> for NativeAssetFrom<T> {
fn contains(asset: &Asset, origin: &Location) -> bool {
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let loc = T::get();
&loc == origin &&
matches!(asset, Asset { id: AssetId(asset_loc), fun: Fungible(_a) }
if *asset_loc == Location::from(Parent))
}
}
/// Allow checking in assets that have issuance > 0.
pub struct NonZeroIssuance<AccountId, Assets>(PhantomData<(AccountId, Assets)>);
impl<AccountId, Assets> Contains<<Assets as fungibles::Inspect<AccountId>>::AssetId>
for NonZeroIssuance<AccountId, Assets>
where
Assets: fungibles::Inspect<AccountId>,
{
fn contains(id: &<Assets as fungibles::Inspect<AccountId>>::AssetId) -> bool {
!Assets::total_issuance(id.clone()).is_zero()
}
}
/// A `HandleCredit` implementation that naively transfers the fees to the block author.
/// Will drop and burn the assets in case the transfer fails.
pub struct AssetsToBlockAuthor<R>(PhantomData<R>);
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impl<R> HandleCredit<AccountIdOf<R>, pallet_assets::Pallet<R, Instance1>> for AssetsToBlockAuthor<R>
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R: pallet_authorship::Config + pallet_assets::Config<Instance1>,
AccountIdOf<R>: From<polkadot_primitives::AccountId> + Into<polkadot_primitives::AccountId>,
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fn handle_credit(credit: Credit<AccountIdOf<R>, pallet_assets::Pallet<R, Instance1>>) {
if let Some(author) = pallet_authorship::Pallet::<R>::author() {
// In case of error: Will drop the result triggering the `OnDrop` of the imbalance.
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let _ = pallet_assets::Pallet::<R, Instance1>::resolve(&author, credit);
// This asset can be added to AH as ForeignAsset and teleported between Penpal and AH
pub const TELEPORTABLE_ASSET_ID: u32 = 2;
/// The location that this chain recognizes as the Relay network's Asset Hub.
pub SystemAssetHubLocation: Location = Location::new(1, [Parachain(1000)]);
// ALWAYS ensure that the index in PalletInstance stays up-to-date with
// the Relay Chain's Asset Hub's Assets pallet index
pub SystemAssetHubAssetsPalletLocation: Location =
Location::new(1, [Parachain(1000), PalletInstance(50)]);
pub AssetsPalletLocation: Location =
Location::new(0, [PalletInstance(50)]);
pub CheckingAccount: AccountId = PolkadotXcm::check_account();
pub LocalTeleportableToAssetHub: Location = Location::new(
0,
[PalletInstance(50), GeneralIndex(TELEPORTABLE_ASSET_ID.into())]
);
pub LocalTeleportableToAssetHubV3: xcm::v3::Location = xcm::v3::Location::new(
0,
[xcm::v3::Junction::PalletInstance(50), xcm::v3::Junction::GeneralIndex(TELEPORTABLE_ASSET_ID.into())]
);
pub EthereumLocation: Location = Location::new(2, [GlobalConsensus(EthereumNetwork::get())]);
}
/// Accepts asset with ID `AssetLocation` and is coming from `Origin` chain.
pub struct AssetFromChain<AssetLocation, Origin>(PhantomData<(AssetLocation, Origin)>);
impl<AssetLocation: Get<Location>, Origin: Get<Location>> ContainsPair<Asset, Location>
for AssetFromChain<AssetLocation, Origin>
{
fn contains(asset: &Asset, origin: &Location) -> bool {
log::trace!(target: "xcm::contains", "AssetFromChain asset: {:?}, origin: {:?}", asset, origin);
*origin == Origin::get() &&
matches!(asset.id.clone(), AssetId(id) if id == AssetLocation::get())
}
pub type Reserves = (
NativeAsset,
AssetsFrom<SystemAssetHubLocation>,
NativeAssetFrom<SystemAssetHubLocation>,
AssetPrefixFrom<EthereumLocation, SystemAssetHubLocation>,
);
pub type TrustedTeleporters =
(AssetFromChain<LocalTeleportableToAssetHub, SystemAssetHubLocation>,);
pub struct XcmConfig;
impl xcm_executor::Config for XcmConfig {
type XcmSender = XcmRouter;
// How to withdraw and deposit an asset.
type AssetTransactor = AssetTransactors;
type OriginConverter = XcmOriginToTransactDispatchOrigin;
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type IsReserve = Reserves;
// no teleport trust established with other chains
type IsTeleporter = TrustedTeleporters;
type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
type Trader =
UsingComponents<WeightToFee, RelayLocation, AccountId, Balances, ToAuthor<Runtime>>;
type ResponseHandler = PolkadotXcm;
type AssetTrap = PolkadotXcm;
type AssetClaims = PolkadotXcm;
type SubscriptionService = PolkadotXcm;
type PalletInstancesInfo = AllPalletsWithSystem;
type MaxAssetsIntoHolding = MaxAssetsIntoHolding;
type AssetLocker = ();
type AssetExchanger = ();
type FeeManager = ();
type MessageExporter = ();
type UniversalAliases = Nothing;
type CallDispatcher = RuntimeCall;
type SafeCallFilter = Everything;
type TransactionalProcessor = FrameTransactionalProcessor;
}
/// No local origins on this chain are allowed to dispatch XCM sends/executions.
pub type LocalOriginToLocation = SignedToAccountId32<RuntimeOrigin, AccountId, RelayNetwork>;
/// The means for routing XCM messages which are not for local execution into the right message
/// queues.
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pub type XcmRouter = WithUniqueTopic<(
// Two routers - use UMP to communicate with the relay chain:
cumulus_primitives_utility::ParentAsUmp<ParachainSystem, PolkadotXcm, ()>,
// ..and XCMP to communicate with the sibling chains.
XcmpQueue,
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)>;
type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
type XcmExecuteFilter = Nothing;
// ^ Disable dispatchable execute on the XCM pallet.
// Needs to be `Everything` for local testing.
type XcmExecutor = XcmExecutor<XcmConfig>;
type XcmTeleportFilter = Everything;
type XcmReserveTransferFilter = Everything;
type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
// ^ Override for AdvertisedXcmVersion default
type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
type Currency = Balances;
type CurrencyMatcher = ();
type TrustedLockers = ();
type SovereignAccountOf = LocationToAccountId;
type MaxLockers = ConstU32<8>;
type WeightInfo = pallet_xcm::TestWeightInfo;
type AdminOrigin = EnsureRoot<AccountId>;
type MaxRemoteLockConsumers = ConstU32<0>;
type RemoteLockConsumerIdentifier = ();
}
impl cumulus_pallet_xcm::Config for Runtime {
type XcmExecutor = XcmExecutor<XcmConfig>;
}
/// Simple conversion of `u32` into an `AssetId` for use in benchmarking.
pub struct XcmBenchmarkHelper;
#[cfg(feature = "runtime-benchmarks")]
impl pallet_assets::BenchmarkHelper<xcm::v3::Location> for XcmBenchmarkHelper {
fn create_asset_id_parameter(id: u32) -> xcm::v3::Location {
xcm::v3::Location::new(1, [xcm::v3::Junction::Parachain(id)])