use crate::{
AccountId, AllPalletsWithSystem, Balances, ParachainInfo, ParachainSystem, PolkadotXcm,
Runtime, RuntimeCall, RuntimeEvent, RuntimeOrigin, WeightToFee, XcmpQueue,
};
use polkadot_sdk::{
staging_xcm as xcm, staging_xcm_builder as xcm_builder, staging_xcm_executor as xcm_executor, *,
};
use frame_support::{
parameter_types,
traits::{ConstU32, Contains, Everything, Nothing},
weights::Weight,
};
use frame_system::EnsureRoot;
use pallet_xcm::XcmPassthrough;
use polkadot_parachain_primitives::primitives::Sibling;
use polkadot_runtime_common::impls::ToAuthor;
use polkadot_sdk::staging_xcm_builder::{DenyRecursively, DenyThenTry};
use xcm::latest::prelude::*;
use xcm_builder::{
AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowTopLevelPaidExecutionFrom,
DenyReserveTransferToRelayChain, EnsureXcmOrigin, FixedWeightBounds,
FrameTransactionalProcessor, FungibleAdapter, IsConcrete, NativeAsset, ParentIsPreset,
RelayChainAsNative, SiblingParachainAsNative, SiblingParachainConvertsVia,
SignedAccountId32AsNative, SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit,
TrailingSetTopicAsId, UsingComponents, WithComputedOrigin, WithUniqueTopic,
};
use xcm_executor::XcmExecutor;
parameter_types! {
pub const RelayLocation: Location = Location::parent();
pub const RelayNetwork: Option<NetworkId> = None;
pub RelayChainOrigin: RuntimeOrigin = cumulus_pallet_xcm::Origin::Relay.into();
// For the real deployment, it is recommended to set `RelayNetwork` according to the relay chain
// and prepend `UniversalLocation` with `GlobalConsensus(RelayNetwork::get())`.
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 LocalAssetTransactor = FungibleAdapter<
// 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.
(),
>;
/// 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
// recognized.
RelayChainAsNative<RelayChainOrigin, RuntimeOrigin>,
// Native converter for sibling Parachains; will convert to a `SiblingPara` origin when
// recognized.
SiblingParachainAsNative<cumulus_pallet_xcm::Origin, 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.
XcmPassthrough<RuntimeOrigin>,
);
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 const MaxInstructions: u32 = 100;
pub const MaxAssetsIntoHolding: u32 = 64;
}
pub struct ParentOrParentsExecutivePlurality;
impl Contains<Location> for ParentOrParentsExecutivePlurality {
fn contains(location: &Location) -> bool {
matches!(location.unpack(), (1, []) | (1, [Plurality { id: BodyId::Executive, .. }]))
}
}
pub type Barrier = TrailingSetTopicAsId<
DenyThenTry<
DenyRecursively<DenyReserveTransferToRelayChain>,
(
TakeWeightCredit,
WithComputedOrigin<
(
AllowTopLevelPaidExecutionFrom<Everything>,
AllowExplicitUnpaidExecutionFrom<ParentOrParentsExecutivePlurality>,
// ^^^ Parent and its exec plurality get free execution
),
UniversalLocation,
ConstU32<8>,
>,
),
>,
>;
pub struct XcmConfig;
impl xcm_executor::Config for XcmConfig {
type RuntimeCall = RuntimeCall;
type XcmSender = XcmRouter;
type XcmEventEmitter = PolkadotXcm;
// How to withdraw and deposit an asset.
type AssetTransactor = LocalAssetTransactor;
type OriginConverter = XcmOriginToTransactDispatchOrigin;
type IsReserve = NativeAsset;
type IsTeleporter = (); // Teleporting is disabled.
type UniversalLocation = UniversalLocation;
type Barrier = Barrier;
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 Aliasers = Nothing;
type TransactionalProcessor = FrameTransactionalProcessor;
type HrmpNewChannelOpenRequestHandler = ();
type HrmpChannelAcceptedHandler = ();
type HrmpChannelClosingHandler = ();
type XcmRecorder = PolkadotXcm;
}
/// 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.
pub type XcmRouter = WithUniqueTopic<(
// Two routers - use UMP to communicate with the relay chain:
cumulus_primitives_utility::ParentAsUmp<ParachainSystem, (), ()>,
// ..and XCMP to communicate with the sibling chains.
XcmpQueue,
)>;
impl pallet_xcm::Config for Runtime {
type RuntimeEvent = RuntimeEvent;
type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;
type XcmRouter = XcmRouter;
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 = Nothing;
type Weigher = FixedWeightBounds<UnitWeightCost, RuntimeCall, MaxInstructions>;
type UniversalLocation = UniversalLocation;
type RuntimeOrigin = RuntimeOrigin;
type RuntimeCall = RuntimeCall;
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 RuntimeEvent = RuntimeEvent;
type XcmExecutor = XcmExecutor<XcmConfig>;
}