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// Copyright (C) 2022 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use super::{
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committed
AccountId, Balances, Call, Event, Origin, ParachainInfo, ParachainSystem, PolkadotXcm, Runtime,
WeightToFee, XcmpQueue,
};
use frame_support::{
match_types, parameter_types,
traits::{EnsureOneOf, Everything, Nothing},
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weights::Weight,
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};
use frame_system::EnsureRoot;
use pallet_xcm::{EnsureXcm, IsMajorityOfBody, XcmPassthrough};
use polkadot_parachain::primitives::Sibling;
use xcm::latest::prelude::*;
use xcm_builder::{
AccountId32Aliases, AllowKnownQueryResponses, AllowSubscriptionsFrom,
AllowTopLevelPaidExecutionFrom, AllowUnpaidExecutionFrom, CurrencyAdapter, EnsureXcmOrigin,
FixedWeightBounds, IsConcrete, LocationInverter, NativeAsset, ParentAsSuperuser,
ParentIsPreset, RelayChainAsNative, SiblingParachainAsNative, SiblingParachainConvertsVia,
SignedAccountId32AsNative, SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit,
UsingComponents,
};
use xcm_executor::XcmExecutor;
parameter_types! {
pub const RelayLocation: MultiLocation = MultiLocation::parent();
pub const RelayNetwork: NetworkId = NetworkId::Any;
pub RelayChainOrigin: Origin = cumulus_pallet_xcm::Origin::Relay.into();
pub Ancestry: MultiLocation = Parachain(ParachainInfo::parachain_id().into()).into();
pub const Local: MultiLocation = Here.into();
pub CheckingAccount: AccountId = PolkadotXcm::check_account();
pub const ExecutiveBody: BodyId = BodyId::Executive;
}
/// We allow root and the Relay Chain council to execute privileged collator selection operations.
pub type CollatorSelectionUpdateOrigin =
EnsureOneOf<EnsureRoot<AccountId>, EnsureXcm<IsMajorityOfBody<RelayLocation, ExecutiveBody>>>;
/// Type for specifying how a `MultiLocation` 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 the native currency 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>,
// 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 don't track any teleports of `Balances`.
(),
>;
/// 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, Origin>,
// Native converter for Relay-chain (Parent) location; will convert to a `Relay` origin when
// recognised.
RelayChainAsNative<RelayChainOrigin, Origin>,
// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when
// recognised.
SiblingParachainAsNative<cumulus_pallet_xcm::Origin, Origin>,
// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a
// transaction from the Root origin.
ParentAsSuperuser<Origin>,
// Native signed account converter; this just converts an `AccountId32` origin into a normal
// `Origin::Signed` origin of the same 32-byte value.
SignedAccountId32AsNative<RelayNetwork, Origin>,
// Xcm origins can be represented natively under the Xcm pallet's Xcm origin.
XcmPassthrough<Origin>,
);
parameter_types! {
// One XCM operation is 1_000_000_000 weight - almost certainly a conservative estimate.
pub UnitWeightCost: Weight = 1_000_000_000;
pub const MaxInstructions: u32 = 100;
}
match_types! {
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pub type ParentOrParentsExecutivePlurality: impl Contains<MultiLocation> = {
MultiLocation { parents: 1, interior: Here } |
MultiLocation { parents: 1, interior: X1(Plurality { id: BodyId::Executive, .. }) }
};
pub type ParentOrSiblings: impl Contains<MultiLocation> = {
MultiLocation { parents: 1, interior: Here } |
MultiLocation { parents: 1, interior: X1(_) }
};
}
pub type Barrier = (
TakeWeightCredit,
AllowTopLevelPaidExecutionFrom<Everything>,
// Parent and its exec plurality get free execution
AllowUnpaidExecutionFrom<ParentOrParentsExecutivePlurality>,
// Expected responses are OK.
AllowKnownQueryResponses<PolkadotXcm>,
// Subscriptions for version tracking are OK.
AllowSubscriptionsFrom<ParentOrSiblings>,
);
pub struct XcmConfig;
impl xcm_executor::Config for XcmConfig {
type Call = Call;
type XcmSender = XcmRouter;
type AssetTransactor = CurrencyTransactor;
type OriginConverter = XcmOriginToTransactDispatchOrigin;
type IsReserve = NativeAsset;
type IsTeleporter = NativeAsset;
type LocationInverter = LocationInverter<Ancestry>;
type Barrier = Barrier;
type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;
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type Trader = UsingComponents<WeightToFee, RelayLocation, AccountId, Balances, ()>;
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type ResponseHandler = PolkadotXcm;
type AssetTrap = PolkadotXcm;
type AssetClaims = PolkadotXcm;
type SubscriptionService = PolkadotXcm;
}
/// Converts a local signed origin into an XCM multilocation.
/// Forms the basis for local origins sending/executing XCMs.
pub type LocalOriginToLocation = SignedToAccountId32<Origin, AccountId, RelayNetwork>;
/// The means for routing XCM messages which are not for local execution into the right message
/// queues.
pub type XcmRouter = (
// 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,
);
impl pallet_xcm::Config for Runtime {
type Event = Event;
// We want to disallow users sending (arbitrary) XCMs from this chain.
type SendXcmOrigin = EnsureXcmOrigin<Origin, ()>;
type XcmRouter = XcmRouter;
// We support local origins dispatching XCM executions in principle...
type ExecuteXcmOrigin = EnsureXcmOrigin<Origin, LocalOriginToLocation>;
// ... but disallow generic XCM execution. As a result only teleports and reserve transfers are allowed.
type XcmExecuteFilter = Nothing;
type XcmExecutor = XcmExecutor<XcmConfig>;
type XcmTeleportFilter = Everything;
type XcmReserveTransferFilter = Everything;
type Weigher = FixedWeightBounds<UnitWeightCost, Call, MaxInstructions>;
type LocationInverter = LocationInverter<Ancestry>;
type Origin = Origin;
type Call = Call;
const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
}
impl cumulus_pallet_xcm::Config for Runtime {
type Event = Event;
type XcmExecutor = XcmExecutor<XcmConfig>;
}
impl cumulus_pallet_xcmp_queue::Config for Runtime {
type Event = Event;
type XcmExecutor = XcmExecutor<XcmConfig>;
type ChannelInfo = ParachainSystem;
type VersionWrapper = PolkadotXcm;
type ExecuteOverweightOrigin = EnsureRoot<AccountId>;
type ControllerOrigin = EnsureOneOf<
EnsureRoot<AccountId>,
EnsureXcm<IsMajorityOfBody<RelayLocation, ExecutiveBody>>,
>;
type ControllerOriginConverter = XcmOriginToTransactDispatchOrigin;
type WeightInfo = cumulus_pallet_xcmp_queue::weights::SubstrateWeight<Runtime>;
}
impl cumulus_pallet_dmp_queue::Config for Runtime {
type Event = Event;
type XcmExecutor = XcmExecutor<XcmConfig>;
type ExecuteOverweightOrigin = EnsureRoot<AccountId>;
}