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Enable Pallet XCM for Kusama & Westend (#2970)

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* Enable Pallet XCM for Kusama & Westend

* Fixes

Co-authored-by: André Silva <andrerfosilva@gmail.com>
This commit is contained in:
Gavin Wood
2021-05-04 18:49:31 +02:00
committed by GitHub
parent d362e6051c
commit e33e74525e
7 changed files with 167 additions and 14 deletions
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polkadot/runtime/westend/src/lib.rs
+73 -4
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@@ -53,13 +53,13 @@ use runtime_parachains::scheduler as parachains_scheduler;
use runtime_parachains::reward_points as parachains_reward_points;
use runtime_parachains::runtime_api_impl::v1 as parachains_runtime_api_impl;
use xcm::v0::{MultiLocation, NetworkId};
use xcm::v0::{MultiLocation, NetworkId, Xcm};
use xcm_executor::XcmExecutor;
use xcm_builder::{
AccountId32Aliases, ChildParachainConvertsVia, SovereignSignedViaLocation, CurrencyAdapter as XcmCurrencyAdapter,
ChildParachainAsNative, SignedAccountId32AsNative, ChildSystemParachainAsSuperuser, LocationInverter, IsConcrete,
FixedWeightBounds, TakeWeightCredit, AllowTopLevelPaidExecutionFrom,
AllowUnpaidExecutionFrom, IsChildSystemParachain, UsingComponents,
FixedWeightBounds, TakeWeightCredit, AllowTopLevelPaidExecutionFrom, AllowUnpaidExecutionFrom,
IsChildSystemParachain, UsingComponents, SignedToAccountId32,
};
use sp_runtime::{
@@ -115,7 +115,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
spec_name: create_runtime_str!("westend"),
impl_name: create_runtime_str!("parity-westend"),
authoring_version: 2,
spec_version: 900,
spec_version: 9000,
impl_version: 0,
#[cfg(not(feature = "disable-runtime-api"))]
apis: RUNTIME_API_VERSIONS,
@@ -858,6 +858,72 @@ impl xcm_executor::Config for XcmConfig {
type ResponseHandler = ();
}
/// Type to convert an `Origin` type value into a `MultiLocation` value which represents an interior location
/// of this chain.
pub type LocalOriginToLocation = (
// And a usual Signed origin to be used in XCM as a corresponding AccountId32
SignedToAccountId32<Origin, AccountId, WestendNetwork>,
);
pub struct OnlyWithdrawTeleportForAccounts;
impl frame_support::traits::Contains<(MultiLocation, Xcm<Call>)> for OnlyWithdrawTeleportForAccounts {
fn contains((ref origin, ref msg): &(MultiLocation, Xcm<Call>)) -> bool {
use xcm::v0::{
Xcm::WithdrawAsset, Order::{BuyExecution, InitiateTeleport, DepositAsset},
MultiAsset::{All, ConcreteFungible}, Junction::{AccountId32, Parachain},
MultiLocation::{Null, X1},
};
match origin {
// Root is allowed to execute anything.
Null => true,
X1(AccountId32 { .. }) => {
// An account ID trying to send a message. We ensure that it's sensible.
// This checks that it's of the form:
// WithdrawAsset {
// assets: [ ConcreteFungible { id: Null } ],
// effects: [ BuyExecution, InitiateTeleport {
// assets: All,
// dest: Parachain,
// effects: [ BuyExecution, DepositAssets {
// assets: All,
// dest: AccountId32,
// } ]
// } ]
// }
matches!(msg, WithdrawAsset { ref assets, ref effects }
if assets.len() == 1
&& matches!(assets[0], ConcreteFungible { id: Null, .. })
&& effects.len() == 2
&& matches!(effects[0], BuyExecution { .. })
&& matches!(effects[1], InitiateTeleport { ref assets, dest: X1(Parachain(..)), ref effects }
if assets.len() == 1
&& matches!(assets[0], All)
&& effects.len() == 2
&& matches!(effects[0], BuyExecution { .. })
&& matches!(effects[1], DepositAsset { ref assets, dest: X1(AccountId32{..}) }
if assets.len() == 1
&& matches!(assets[0], All)
)
)
)
}
// Nobody else is allowed to execute anything.
_ => false,
}
}
}
impl pallet_xcm::Config for Runtime {
type Event = Event;
type SendXcmOrigin = xcm_builder::EnsureXcmOrigin<Origin, LocalOriginToLocation>;
type XcmRouter = XcmRouter;
// Anyone can execute XCM messages locally...
type ExecuteXcmOrigin = xcm_builder::EnsureXcmOrigin<Origin, LocalOriginToLocation>;
// ...but they must match our filter, which requires them to be a simple withdraw + teleport.
type XcmExecuteFilter = OnlyWithdrawTeleportForAccounts;
type XcmExecutor = XcmExecutor<XcmConfig>;
}
construct_runtime! {
pub enum Runtime where
Block = Block,
@@ -931,6 +997,9 @@ construct_runtime! {
Registrar: paras_registrar::{Pallet, Call, Storage, Event<T>} = 60,
Slots: slots::{Pallet, Call, Storage, Event<T>} = 61,
ParasSudoWrapper: paras_sudo_wrapper::{Pallet, Call} = 62,
// Pallet for sending XCM.
XcmPallet: pallet_xcm::{Pallet, Call, Storage, Event<T>} = 99,
}
}