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[xcm] Small enhancements for NetworkExportTable and xcm-builder (#1848)

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## Summary

This PR introduces several enhancements.

The current implementation of `NetworkExportTable` lacks remote location
filtering support beyond `NetworkId` lookup. To provide more control and
granularity, it's essential to allow configuration for bridging to
different consensus `NetworkId` while restricting access e.g. to
particular remote parachains.

Additionally, the `StartsWith` and `Equals` and
`StartsWithExplicitGlobalConsensus` helper functions, which are in
active use, are moved to the `xcm-builder` and `frame_support` modules
for better code organization.

Adds a new `LocationWithAssetFilters` filter to enable location-based
and asset-related filtering. This filter is useful for configuring the
`pallet_xcm` filter for
[XcmTeleportFilter](https://github.com/paritytech/polkadot-sdk/blob/master/polkadot/xcm/pallet-xcm/src/lib.rs#L212)
and
[XcmReserveTransferFilter](https://github.com/paritytech/polkadot-sdk/blob/master/polkadot/xcm/pallet-xcm/src/lib.rs#L216)
to restrict specific assets.

Furthermore, the `BridgeMessage` fields are not accessible outside of
`xcm-builder`, limiting the ability to create custom logic dependent on
it.

---------

Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
This commit is contained in:
Branislav Kontur
2023-10-17 11:11:03 +02:00
committed by GitHub
parent e10de2e283
commit 5cdd819ed2
17 changed files with 412 additions and 74 deletions
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cumulus/parachains/runtimes/assets/common/src/lib.rs
+4 -4
View File
@@ -21,11 +21,11 @@ pub mod local_and_foreign_assets;
pub mod matching;
pub mod runtime_api;
use crate::matching::{Equals, LocalMultiLocationPattern, ParentLocation, StartsWith};
use frame_support::traits::EverythingBut;
use crate::matching::{LocalMultiLocationPattern, ParentLocation};
use frame_support::traits::{Equals, EverythingBut};
use parachains_common::AssetIdForTrustBackedAssets;
use xcm::prelude::MultiLocation;
use xcm_builder::{AsPrefixedGeneralIndex, MatchedConvertedConcreteId};
use xcm_builder::{AsPrefixedGeneralIndex, MatchedConvertedConcreteId, StartsWith};
use xcm_executor::traits::{Identity, JustTry};
/// `MultiLocation` vs `AssetIdForTrustBackedAssets` converter for `TrustBackedAssets`
@@ -96,9 +96,9 @@ pub type PoolAssetsConvertedConcreteId<PoolAssetsPalletLocation, Balance> =
#[cfg(test)]
mod tests {
use super::*;
use crate::matching::StartsWithExplicitGlobalConsensus;
use sp_runtime::traits::MaybeEquivalence;
use xcm::latest::prelude::*;
use xcm_builder::StartsWithExplicitGlobalConsensus;
use xcm_executor::traits::{Error as MatchError, MatchesFungibles};
#[test]