Asset Hubs: auto incremented asset id for trust backed assets (#414)

Setup auto incremented asset id to `50_000_000` for trust backed assets.

---------

Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>

CHANGELOG.md

@@ -52,6 +52,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Polkadot chains: allow arbitrary XCM execution ([polkadot-fellows/runtimes#345](https://github.com/polkadot-fellows/runtimes/pull/345)).
 - Bounties: Remove payout delay ([polkadot-fellows/runtimes#386](https://github.com/polkadot-fellows/runtimes/pull/386)).
 - Polkadot System Chains: Reduce the base transaction fee by half ([polkadot-fellows/runtimes#398](https://github.com/polkadot-fellows/runtimes/pull/398)).
+- Asset Hubs: setup auto incremented asset id to 50_000_000 for trust backed assets ([polkadot-fellows/runtimes#414](https://github.com/polkadot-fellows/runtimes/pull/414)).
 
 #### From [#322](https://github.com/polkadot-fellows/runtimes/pull/322):
 

system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs

@@ -62,8 +62,8 @@ use frame_support::{
 	ord_parameter_types, parameter_types,
 	traits::{
 		fungible, fungibles, tokens::imbalance::ResolveAssetTo, AsEnsureOriginWithArg, ConstBool,
-		ConstU128, ConstU32, ConstU64, ConstU8, EitherOfDiverse, EnsureOrigin, EnsureOriginWithArg,
-		Equals, InstanceFilter, TransformOrigin, WithdrawReasons,
+		ConstU128, ConstU32, ConstU64, ConstU8, EitherOfDiverse, Equals, InstanceFilter,
+		TransformOrigin, WithdrawReasons,
 	},
 	weights::{ConstantMultiplier, Weight, WeightToFee as _},
 	BoundedVec, PalletId,
@@ -297,27 +297,6 @@ parameter_types! {
 /// We allow root to execute privileged asset operations.
 pub type AssetsForceOrigin = EnsureRoot<AccountId>;
 
-/// Ensure that the proposed asset id is less than `50_000_000` and origin is signed.
-pub struct EnsureLessThanAutoIncrement;
-impl EnsureOriginWithArg<RuntimeOrigin, AssetIdForTrustBackedAssets>
-	for EnsureLessThanAutoIncrement
-{
-	type Success = AccountId;
-	fn try_origin(
-		o: RuntimeOrigin,
-		a: &AssetIdForTrustBackedAssets,
-	) -> Result<Self::Success, RuntimeOrigin> {
-		if *a >= 50_000_000 {
-			return Err(o);
-		}
-		<EnsureSigned<AccountId> as EnsureOrigin<RuntimeOrigin>>::try_origin(o)
-	}
-	#[cfg(feature = "runtime-benchmarks")]
-	fn try_successful_origin(_a: &AssetIdForTrustBackedAssets) -> Result<RuntimeOrigin, ()> {
-		<EnsureSigned<AccountId> as EnsureOrigin<RuntimeOrigin>>::try_successful_origin()
-	}
-}
-
 // Called "Trust Backed" assets because these are generally registered by some account, and users of
 // the asset assume it has some claimed backing. The pallet is called `Assets` in
 // `construct_runtime` to avoid breaking changes on storage reads.
@@ -329,7 +308,7 @@ impl pallet_assets::Config<TrustBackedAssetsInstance> for Runtime {
 	type AssetId = AssetIdForTrustBackedAssets;
 	type AssetIdParameter = codec::Compact<AssetIdForTrustBackedAssets>;
 	type Currency = Balances;
-	type CreateOrigin = EnsureLessThanAutoIncrement;
+	type CreateOrigin = AsEnsureOriginWithArg<EnsureSigned<AccountId>>;
 	type ForceOrigin = AssetsForceOrigin;
 	type AssetDeposit = AssetDeposit;
 	type MetadataDepositBase = MetadataDepositBase;
@@ -339,7 +318,7 @@ impl pallet_assets::Config<TrustBackedAssetsInstance> for Runtime {
 	type Freezer = ();
 	type Extra = ();
 	type WeightInfo = weights::pallet_assets_local::WeightInfo<Runtime>;
-	type CallbackHandle = ();
+	type CallbackHandle = pallet_assets::AutoIncAssetId<Runtime, TrustBackedAssetsInstance>;
 	type AssetAccountDeposit = AssetAccountDeposit;
 	type RemoveItemsLimit = frame_support::traits::ConstU32<1000>;
 	#[cfg(feature = "runtime-benchmarks")]
@@ -1079,6 +1058,11 @@ pub type Migrations = (
 	frame_support::migrations::RemovePallet<DmpQueueName, RocksDbWeight>,
 	pallet_collator_selection::migration::v2::MigrationToV2<Runtime>,
 	cumulus_pallet_xcmp_queue::migration::v5::MigrateV4ToV5<Runtime>,
+	pallet_assets::migration::next_asset_id::SetNextAssetId<
+		ConstU32<50_000_000>,
+		Runtime,
+		TrustBackedAssetsInstance,
+	>,
 	// permanent
 	pallet_xcm::migration::MigrateToLatestXcmVersion<Runtime>,
 );

system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs

@@ -100,8 +100,8 @@ use frame_support::{
 	parameter_types,
 	traits::{
 		fungible, fungibles, tokens::imbalance::ResolveAssetTo, AsEnsureOriginWithArg, ConstBool,
-		ConstU32, ConstU64, ConstU8, EitherOfDiverse, EnsureOrigin, EnsureOriginWithArg, Equals,
-		InstanceFilter, NeverEnsureOrigin, TransformOrigin, WithdrawReasons,
+		ConstU32, ConstU64, ConstU8, EitherOfDiverse, Equals, InstanceFilter, NeverEnsureOrigin,
+		TransformOrigin, WithdrawReasons,
 	},
 	weights::{ConstantMultiplier, Weight, WeightToFee as _},
 	PalletId,
@@ -315,27 +315,6 @@ parameter_types! {
 /// We allow root to execute privileged asset operations.
 pub type AssetsForceOrigin = EnsureRoot<AccountId>;
 
-/// Ensure that the proposed asset id is less than `50_000_000` and origin is signed.
-pub struct EnsureLessThanAutoIncrement;
-impl EnsureOriginWithArg<RuntimeOrigin, AssetIdForTrustBackedAssets>
-	for EnsureLessThanAutoIncrement
-{
-	type Success = AccountId;
-	fn try_origin(
-		o: RuntimeOrigin,
-		a: &AssetIdForTrustBackedAssets,
-	) -> Result<Self::Success, RuntimeOrigin> {
-		if *a >= 50_000_000 {
-			return Err(o);
-		}
-		<EnsureSigned<AccountId> as EnsureOrigin<RuntimeOrigin>>::try_origin(o)
-	}
-	#[cfg(feature = "runtime-benchmarks")]
-	fn try_successful_origin(_a: &AssetIdForTrustBackedAssets) -> Result<RuntimeOrigin, ()> {
-		<EnsureSigned<AccountId> as EnsureOrigin<RuntimeOrigin>>::try_successful_origin()
-	}
-}
-
 // Called "Trust Backed" assets because these are generally registered by some account, and users of
 // the asset assume it has some claimed backing. The pallet is called `Assets` in
 // `construct_runtime` to avoid breaking changes on storage reads.
@@ -347,7 +326,7 @@ impl pallet_assets::Config<TrustBackedAssetsInstance> for Runtime {
 	type AssetId = AssetIdForTrustBackedAssets;
 	type AssetIdParameter = codec::Compact<AssetIdForTrustBackedAssets>;
 	type Currency = Balances;
-	type CreateOrigin = EnsureLessThanAutoIncrement;
+	type CreateOrigin = AsEnsureOriginWithArg<EnsureSigned<AccountId>>;
 	type ForceOrigin = AssetsForceOrigin;
 	type AssetDeposit = AssetDeposit;
 	type MetadataDepositBase = MetadataDepositBase;
@@ -357,7 +336,7 @@ impl pallet_assets::Config<TrustBackedAssetsInstance> for Runtime {
 	type Freezer = ();
 	type Extra = ();
 	type WeightInfo = weights::pallet_assets_local::WeightInfo<Runtime>;
-	type CallbackHandle = ();
+	type CallbackHandle = pallet_assets::AutoIncAssetId<Runtime, TrustBackedAssetsInstance>;
 	type AssetAccountDeposit = AssetAccountDeposit;
 	type RemoveItemsLimit = frame_support::traits::ConstU32<1000>;
 	#[cfg(feature = "runtime-benchmarks")]
@@ -1061,6 +1040,11 @@ pub type Migrations = (
 	cumulus_pallet_xcmp_queue::migration::v4::MigrationToV4<Runtime>,
 	pallet_collator_selection::migration::v2::MigrationToV2<Runtime>,
 	cumulus_pallet_xcmp_queue::migration::v5::MigrateV4ToV5<Runtime>,
+	pallet_assets::migration::next_asset_id::SetNextAssetId<
+		ConstU32<50_000_000>,
+		Runtime,
+		TrustBackedAssetsInstance,
+	>,
 	// permanent
 	pallet_xcm::migration::MigrateToLatestXcmVersion<Runtime>,
 );