add foreign assets pallet

Author: alistair-singh

Cargo.lock

@@ -75,10 +75,12 @@ cumulus-primitives-utility = { path = "../../../../primitives/utility", default-
 pallet-collator-selection = { path = "../../../../pallets/collator-selection", default-features = false }
 parachain-info = { package = "staging-parachain-info", path = "../../../pallets/parachain-info", default-features = false }
 parachains-common = { path = "../../../common", default-features = false }
+assets-common = { path = "../../assets/common", default-features = false }
 
 [features]
 default = [ "std" ]
 std = [
+	"assets-common/std",
 	"codec/std",
 	"cumulus-pallet-aura-ext/std",
 	"cumulus-pallet-dmp-queue/std",
@@ -135,6 +137,7 @@ std = [
 ]
 
 runtime-benchmarks = [
+	"assets-common/runtime-benchmarks",
 	"cumulus-pallet-dmp-queue/runtime-benchmarks",
 	"cumulus-pallet-parachain-system/runtime-benchmarks",
 	"cumulus-pallet-session-benchmarking/runtime-benchmarks",

cumulus/parachains/runtimes/testing/penpal/Cargo.toml

@@ -32,6 +32,11 @@ include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
 mod weights;
 pub mod xcm_config;
 
+use assets_common::{
+	foreign_creators::ForeignCreators,
+	matching::FromSiblingParachain,
+	MultiLocationForAssetId,
+};
 use cumulus_pallet_parachain_system::RelayNumberStrictlyIncreases;
 use cumulus_primitives_core::{AggregateMessageOrigin, ParaId};
 use frame_support::{
@@ -70,7 +75,7 @@ use sp_std::prelude::*;
 #[cfg(feature = "std")]
 use sp_version::NativeVersion;
 use sp_version::RuntimeVersion;
-use xcm_config::{AssetsToBlockAuthor, XcmOriginToTransactDispatchOrigin};
+use xcm_config::{AssetsToBlockAuthor, ForeignCreatorsSovereignAccountOf, XcmOriginToTransactDispatchOrigin};
 
 #[cfg(any(feature = "std", test))]
 pub use sp_runtime::BuildStorage;
@@ -457,6 +462,49 @@ impl pallet_assets::Config<pallet_assets::Instance1> for Runtime {
 	type BenchmarkHelper = ();
 }
 
+
+parameter_types! {
+	// we just reuse the same deposits
+	pub const ForeignAssetsAssetDeposit: Balance = AssetDeposit::get();
+	pub const ForeignAssetsAssetAccountDeposit: Balance = AssetAccountDeposit::get();
+	pub const ForeignAssetsApprovalDeposit: Balance = ApprovalDeposit::get();
+	pub const ForeignAssetsAssetsStringLimit: u32 = AssetsStringLimit::get();
+	pub const ForeignAssetsMetadataDepositBase: Balance = MetadataDepositBase::get();
+	pub const ForeignAssetsMetadataDepositPerByte: Balance = MetadataDepositPerByte::get();
+}
+
+/// We allow root to execute privileged asset operations.
+pub type AssetsForceOrigin = EnsureRoot<AccountId>;
+
+/// Another pallet assets instance to store foreign assets from bridgehub.
+pub type ForeignAssetsInstance = pallet_assets::Instance2;
+impl pallet_assets::Config<ForeignAssetsInstance> for Runtime {
+	type RuntimeEvent = RuntimeEvent;
+	type Balance = Balance;
+	type AssetId = MultiLocationForAssetId;
+	type AssetIdParameter = MultiLocationForAssetId;
+	type Currency = Balances;
+	type CreateOrigin = ForeignCreators<
+		(FromSiblingParachain<parachain_info::Pallet<Runtime>>,),
+		ForeignCreatorsSovereignAccountOf,
+		AccountId,
+	>;
+	type ForceOrigin = AssetsForceOrigin;
+	type AssetDeposit = ForeignAssetsAssetDeposit;
+	type MetadataDepositBase = ForeignAssetsMetadataDepositBase;
+	type MetadataDepositPerByte = ForeignAssetsMetadataDepositPerByte;
+	type ApprovalDeposit = ForeignAssetsApprovalDeposit;
+	type StringLimit = ForeignAssetsAssetsStringLimit;
+	type Freezer = ();
+	type Extra = ();
+	type WeightInfo = pallet_assets::weights::SubstrateWeight<Runtime>;
+	type CallbackHandle = ();
+	type AssetAccountDeposit = ForeignAssetsAssetAccountDeposit;
+	type RemoveItemsLimit = frame_support::traits::ConstU32<1000>;
+	#[cfg(feature = "runtime-benchmarks")]
+	type BenchmarkHelper = xcm_config::XcmBenchmarkHelper;
+}
+
 parameter_types! {
 	pub const ReservedXcmpWeight: Weight = MAXIMUM_BLOCK_WEIGHT.saturating_div(4);
 	pub const ReservedDmpWeight: Weight = MAXIMUM_BLOCK_WEIGHT.saturating_div(4);
@@ -625,6 +673,7 @@ construct_runtime!(
 
 		// The main stage.
 		Assets: pallet_assets::<Instance1>::{Pallet, Call, Storage, Event<T>} = 50,
+		ForeignAssets: pallet_assets::<Instance2>::{Pallet, Call, Storage, Event<T>} = 51,
 
 		Sudo: pallet_sudo::{Pallet, Call, Storage, Event<T>, Config<T>} = 255,
 	}

cumulus/parachains/runtimes/testing/penpal/src/lib.rs

@@ -293,6 +293,13 @@ pub type XcmRouter = WithUniqueTopic<(
 	XcmpQueue,
 )>;
 
+// TODO(alistair): Only assethub should be able to create.
+pub type ForeignCreatorsSovereignAccountOf = (
+	SiblingParachainConvertsVia<Sibling, AccountId>,
+	AccountId32Aliases<RelayNetwork, AccountId>,
+	ParentIsPreset<AccountId>,
+);
+
 impl pallet_xcm::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
 	type SendXcmOrigin = EnsureXcmOrigin<RuntimeOrigin, LocalOriginToLocation>;