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allow governance body on parachain to have sovereign account (#1291)

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The goal is to allow Fellowship on Collective chain to have a sovereign
account on Polkadot so that we can add it as an identity registrar. This
will allow Fellows origin to be able to provide judgements for
Fellowship members.

This currently allow any body on any parachain including non system
parachains to have sovereign account. I cannot think of any reason why
that may be an issue but let me know if I should change it to filter
only system parachains.

[This](https://gist.github.com/xlc/ec61bfa4e9f6d62da27d30141ad2c72b) is
the testing script.

Original PR: https://github.com/paritytech/polkadot/pull/7518
This commit is contained in:
Xiliang Chen
2023-09-20 01:27:42 +12:00
committed by GitHub
parent 2d96c8d27c
commit cdbdbc7546
6 changed files with 51 additions and 22 deletions
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polkadot/runtime/rococo/src/xcm_config.rs
+13 -6
View File
@@ -36,10 +36,11 @@ use xcm::latest::prelude::*;
use xcm_builder::{
AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
AllowSubscriptionsFrom, AllowTopLevelPaidExecutionFrom, ChildParachainAsNative,
ChildParachainConvertsVia, CurrencyAdapter as XcmCurrencyAdapter, FixedWeightBounds,
IsChildSystemParachain, IsConcrete, MintLocation, SignedAccountId32AsNative,
SignedToAccountId32, SovereignSignedViaLocation, TakeWeightCredit, TrailingSetTopicAsId,
UsingComponents, WeightInfoBounds, WithComputedOrigin, WithUniqueTopic,
ChildParachainConvertsVia, CurrencyAdapter as XcmCurrencyAdapter, DescribeBodyTerminal,
DescribeFamily, FixedWeightBounds, HashedDescription, IsChildSystemParachain, IsConcrete,
MintLocation, SignedAccountId32AsNative, SignedToAccountId32, SovereignSignedViaLocation,
TakeWeightCredit, TrailingSetTopicAsId, UsingComponents, WeightInfoBounds, WithComputedOrigin,
WithUniqueTopic,
};
use xcm_executor::XcmExecutor;
@@ -51,8 +52,14 @@ parameter_types! {
pub LocalCheckAccount: (AccountId, MintLocation) = (CheckAccount::get(), MintLocation::Local);
}
pub type LocationConverter =
(ChildParachainConvertsVia<ParaId, AccountId>, AccountId32Aliases<ThisNetwork, AccountId>);
pub type LocationConverter = (
// We can convert a child parachain using the standard `AccountId` conversion.
ChildParachainConvertsVia<ParaId, AccountId>,
// We can directly alias an `AccountId32` into a local account.
AccountId32Aliases<ThisNetwork, AccountId>,
// Allow governance body to be used as a sovereign account.
HashedDescription<AccountId, DescribeFamily<DescribeBodyTerminal>>,
);
/// Our asset transactor. This is what allows us to interest with the runtime facilities from the
/// point of view of XCM-only concepts like `MultiLocation` and `MultiAsset`.