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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::{
AccountId, AllPalletsWithSystem, Assets, Authorship, Balance, Balances, ParachainInfo,
ParachainSystem, PolkadotXcm, Runtime, RuntimeCall, RuntimeEvent, RuntimeOrigin,
TrustBackedAssetsInstance, WeightToFee, XcmpQueue,
};
use frame_support::{
match_types, parameter_types,
traits::{ConstU32, Contains, Everything, Nothing, PalletInfoAccess},
};
use pallet_xcm::XcmPassthrough;
use parachains_common::{
impls::ToStakingPot,
xcm_config::{
AssetFeeAsExistentialDepositMultiplier, DenyReserveTransferToRelayChain, DenyThenTry,
},
use polkadot_parachain::primitives::Sibling;
use sp_runtime::traits::ConvertInto;
use xcm::latest::prelude::*;
use xcm_builder::{
AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
AllowSubscriptionsFrom, AllowTopLevelPaidExecutionFrom, CurrencyAdapter, EnsureXcmOrigin,
FungiblesAdapter, IsConcrete, LocalMint, NativeAsset, ParentAsSuperuser, ParentIsPreset,
RelayChainAsNative, SiblingParachainAsNative, SiblingParachainConvertsVia,
SignedAccountId32AsNative, SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit,
UsingComponents, WeightInfoBounds, WithComputedOrigin,
use xcm_executor::{traits::WithOriginFilter, XcmExecutor};
parameter_types! {
pub const WestendLocation: MultiLocation = MultiLocation::parent();
pub RelayNetwork: Option<NetworkId> = Some(NetworkId::Westend);
pub RelayChainOrigin: RuntimeOrigin = cumulus_pallet_xcm::Origin::Relay.into();
pub UniversalLocation: InteriorMultiLocation =
X2(GlobalConsensus(RelayNetwork::get().unwrap()), Parachain(ParachainInfo::parachain_id().into()));
pub const Local: MultiLocation = Here.into_location();
pub TrustBackedAssetsPalletLocation: MultiLocation =
PalletInstance(<Assets as PalletInfoAccess>::index() as u8).into();
pub CheckingAccount: AccountId = PolkadotXcm::check_account();
}
/// 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<WestendLocation>,
// 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`.
(),
>;
/// `AssetId/Balancer` converter for `TrustBackedAssets`
pub type TrustBackedAssetsConvertedConcreteId =
assets_common::TrustBackedAssetsConvertedConcreteId<TrustBackedAssetsPalletLocation, Balance>;
/// 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:
// 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 only want to allow teleports of known assets. We use non-zero issuance as an indication
// that this asset is known.
LocalMint<parachains_common::impls::NonZeroIssuance<AccountId, Assets>>,
// The account to use for tracking teleports.
CheckingAccount,
>;
/// Means for transacting assets on this chain.
pub type AssetTransactors = (CurrencyTransactor, 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
// recognised.
RelayChainAsNative<RelayChainOrigin, RuntimeOrigin>,
// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when
// recognised.
SiblingParachainAsNative<cumulus_pallet_xcm::Origin, RuntimeOrigin>,
// Superuser converter for the Relay-chain (Parent) location. This will allow it to issue a
// transaction from the Root origin.
// 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! {
pub const MaxInstructions: u32 = 100;
pub XcmAssetFeesReceiver: Option<AccountId> = Authorship::author();
match_types! {
pub type ParentOrParentsPlurality: impl Contains<MultiLocation> = {
MultiLocation { parents: 1, interior: Here } |
MultiLocation { parents: 1, interior: X1(Plurality { .. }) }
};
}
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/// A call filter for the XCM Transact instruction. This is a temporary measure until we properly
/// account for proof size weights.
///
/// Calls that are allowed through this filter must:
/// 1. Have a fixed weight;
/// 2. Cannot lead to another call being made;
/// 3. Have a defined proof size weight, e.g. no unbounded vecs in call parameters.
pub struct SafeCallFilter;
impl Contains<RuntimeCall> for SafeCallFilter {
fn contains(call: &RuntimeCall) -> bool {
#[cfg(feature = "runtime-benchmarks")]
{
if matches!(call, RuntimeCall::System(frame_system::Call::remark_with_event { .. })) {
return true
}
}
match call {
RuntimeCall::System(
frame_system::Call::set_heap_pages { .. } |
frame_system::Call::set_code { .. } |
frame_system::Call::set_code_without_checks { .. } |
frame_system::Call::kill_prefix { .. },
) |
RuntimeCall::ParachainSystem(..) |
RuntimeCall::Timestamp(..) |
RuntimeCall::Balances(..) |
RuntimeCall::CollatorSelection(
pallet_collator_selection::Call::set_desired_candidates { .. } |
pallet_collator_selection::Call::set_candidacy_bond { .. } |
pallet_collator_selection::Call::register_as_candidate { .. } |
pallet_collator_selection::Call::leave_intent { .. },
) |
RuntimeCall::Session(pallet_session::Call::purge_keys { .. }) |
RuntimeCall::XcmpQueue(..) |
RuntimeCall::DmpQueue(..) |
RuntimeCall::Utility(pallet_utility::Call::as_derivative { .. }) |
RuntimeCall::Assets(
pallet_assets::Call::create { .. } |
pallet_assets::Call::force_create { .. } |
pallet_assets::Call::start_destroy { .. } |
pallet_assets::Call::destroy_accounts { .. } |
pallet_assets::Call::destroy_approvals { .. } |
pallet_assets::Call::finish_destroy { .. } |
pallet_assets::Call::mint { .. } |
pallet_assets::Call::burn { .. } |
pallet_assets::Call::transfer { .. } |
pallet_assets::Call::transfer_keep_alive { .. } |
pallet_assets::Call::force_transfer { .. } |
pallet_assets::Call::freeze { .. } |
pallet_assets::Call::thaw { .. } |
pallet_assets::Call::freeze_asset { .. } |
pallet_assets::Call::thaw_asset { .. } |
pallet_assets::Call::transfer_ownership { .. } |
pallet_assets::Call::set_team { .. } |
pallet_assets::Call::clear_metadata { .. } |
pallet_assets::Call::force_clear_metadata { .. } |
pallet_assets::Call::force_asset_status { .. } |
pallet_assets::Call::approve_transfer { .. } |
pallet_assets::Call::cancel_approval { .. } |
pallet_assets::Call::force_cancel_approval { .. } |
pallet_assets::Call::transfer_approved { .. } |
pallet_assets::Call::touch { .. } |
pallet_assets::Call::refund { .. },
) |
RuntimeCall::Uniques(
pallet_uniques::Call::create { .. } |
pallet_uniques::Call::force_create { .. } |
pallet_uniques::Call::destroy { .. } |
pallet_uniques::Call::mint { .. } |
pallet_uniques::Call::burn { .. } |
pallet_uniques::Call::transfer { .. } |
pallet_uniques::Call::freeze { .. } |
pallet_uniques::Call::thaw { .. } |
pallet_uniques::Call::freeze_collection { .. } |
pallet_uniques::Call::thaw_collection { .. } |
pallet_uniques::Call::transfer_ownership { .. } |
pallet_uniques::Call::set_team { .. } |
pallet_uniques::Call::approve_transfer { .. } |
pallet_uniques::Call::cancel_approval { .. } |
pallet_uniques::Call::force_item_status { .. } |
pallet_uniques::Call::set_attribute { .. } |
pallet_uniques::Call::clear_attribute { .. } |
pallet_uniques::Call::set_metadata { .. } |
pallet_uniques::Call::clear_metadata { .. } |
pallet_uniques::Call::set_collection_metadata { .. } |
pallet_uniques::Call::clear_collection_metadata { .. } |
pallet_uniques::Call::set_accept_ownership { .. } |
pallet_uniques::Call::set_collection_max_supply { .. } |
pallet_uniques::Call::set_price { .. } |
pallet_uniques::Call::buy_item { .. },
) => true,
_ => false,
}
}
}
pub type Barrier = DenyThenTry<
DenyReserveTransferToRelayChain,
(
TakeWeightCredit,
// Expected responses are OK.
AllowKnownQueryResponses<PolkadotXcm>,
// Allow XCMs with some computed origins to pass through.
WithComputedOrigin<
(
// If the message is one that immediately attemps to pay for execution, then allow it.
AllowTopLevelPaidExecutionFrom<Everything>,
// Parent or its plurality (i.e. governance bodies) gets free execution.
AllowExplicitUnpaidExecutionFrom<ParentOrParentsPlurality>,
// Subscriptions for version tracking are OK.
AllowSubscriptionsFrom<Everything>,
),
UniversalLocation,
ConstU32<8>,
>,
pub type AssetFeeAsExistentialDepositMultiplierFeeCharger = AssetFeeAsExistentialDepositMultiplier<
Runtime,
WeightToFee,
pallet_assets::BalanceToAssetBalance<Balances, Runtime, ConvertInto, TrustBackedAssetsInstance>,
TrustBackedAssetsInstance,
>;
pub struct XcmConfig;
impl xcm_executor::Config for XcmConfig {
type XcmSender = XcmRouter;
type AssetTransactor = AssetTransactors;
type OriginConverter = XcmOriginToTransactDispatchOrigin;
// Westmint does not recognize a reserve location for any asset. This does not prevent
// Westmint acting _as_ a reserve location for WND and assets created under `pallet-assets`.
// For WND, users must use teleport where allowed (e.g. with the Relay Chain).
type IsReserve = ();
type IsTeleporter = NativeAsset; // <- should be enough to allow teleportation of WND
type Barrier = Barrier;
type Weigher = WeightInfoBounds<
crate::weights::xcm::WestmintXcmWeight<RuntimeCall>,
RuntimeCall,
MaxInstructions,
>;
type Trader = (
UsingComponents<WeightToFee, WestendLocation, AccountId, Balances, ToStakingPot<Runtime>>,
cumulus_primitives_utility::TakeFirstAssetTrader<
AccountId,
AssetFeeAsExistentialDepositMultiplierFeeCharger,
Assets,
cumulus_primitives_utility::XcmFeesTo32ByteAccount<
FungiblesTransactor,
AccountId,
XcmAssetFeesReceiver,
>,
>,
);
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 = WithOriginFilter<SafeCallFilter>;
type SafeCallFilter = SafeCallFilter;
}
/// 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.
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,
);
#[cfg(feature = "runtime-benchmarks")]
parameter_types! {
pub ReachableDest: Option<MultiLocation> = Some(Parent.into());
}
impl pallet_xcm::Config for Runtime {
type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
type XcmRouter = XcmRouter;
type ExecuteXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
type XcmExecuteFilter = Everything;
type XcmExecutor = XcmExecutor<XcmConfig>;
type XcmTeleportFilter = Everything;
type XcmReserveTransferFilter = Everything;
type Weigher = WeightInfoBounds<
crate::weights::xcm::WestmintXcmWeight<RuntimeCall>,
RuntimeCall,
MaxInstructions,
>;
const VERSION_DISCOVERY_QUEUE_SIZE: u32 = 100;
type AdvertisedXcmVersion = pallet_xcm::CurrentXcmVersion;
type Currency = Balances;
type CurrencyMatcher = ();
type TrustedLockers = ();
type SovereignAccountOf = LocationToAccountId;
type MaxLockers = ConstU32<8>;
type WeightInfo = crate::weights::pallet_xcm::WeightInfo<Runtime>;
#[cfg(feature = "runtime-benchmarks")]
type ReachableDest = ReachableDest;
}
impl cumulus_pallet_xcm::Config for Runtime {
type XcmExecutor = XcmExecutor<XcmConfig>;
}