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Asset Hub: auto incremented asset id for trust backed assets #5687

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Sep 16, 2024
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Original file line number Diff line number Diff line change
Expand Up @@ -266,7 +266,7 @@ impl pallet_assets::Config<TrustBackedAssetsInstance> for Runtime {
type Freezer = AssetsFreezer;
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")]
Expand Down Expand Up @@ -1019,6 +1019,12 @@ pub type Migrations = (
cumulus_pallet_xcmp_queue::migration::v5::MigrateV4ToV5<Runtime>,
pallet_collator_selection::migration::v2::MigrationToV2<Runtime>,
frame_support::migrations::RemovePallet<StateTrieMigrationName, RocksDbWeight>,
// unreleased
pallet_assets::migration::next_asset_id::SetNextAssetId<
ConstU32<50_000_000>,
Runtime,
TrustBackedAssetsInstance,
>,
// permanent
pallet_xcm::migration::MigrateToLatestXcmVersion<Runtime>,
);
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -263,7 +263,7 @@ impl pallet_assets::Config<TrustBackedAssetsInstance> for Runtime {
type Freezer = AssetsFreezer;
type Extra = ();
type WeightInfo = weights::pallet_assets_local::WeightInfo<Runtime>;
type CallbackHandle = ();
type CallbackHandle = pallet_assets::AutoIncAssetId<Runtime, TrustBackedAssetsInstance>;
type AssetAccountDeposit = AssetAccountDeposit;
type RemoveItemsLimit = ConstU32<1000>;
#[cfg(feature = "runtime-benchmarks")]
Expand Down Expand Up @@ -1021,6 +1021,12 @@ pub type Migrations = (
// unreleased
cumulus_pallet_xcmp_queue::migration::v4::MigrationToV4<Runtime>,
cumulus_pallet_xcmp_queue::migration::v5::MigrateV4ToV5<Runtime>,
// unreleased
pallet_assets::migration::next_asset_id::SetNextAssetId<
ConstU32<50_000_000>,
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How about defining and naming a const under runtimes/constants/ instead of having this magic number here?

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it will be gone after the migration applied

Runtime,
TrustBackedAssetsInstance,
>,
// permanent
pallet_xcm::migration::MigrateToLatestXcmVersion<Runtime>,
);
Expand Down
24 changes: 24 additions & 0 deletions prdoc/pr_5687.prdoc
Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json

title: "Westend/Rococo Asset Hub: auto incremented asset id for trust backed assets"

doc:
- audience: Runtime User
description: |
Setup auto incremented asset id to `50_000_000` for trust backed assets.

### Migration
This change does not break the API but introduces a new constraint. It implements
an auto-incremented ID strategy for Trust-Backed Assets (50 pallet instance indexes on both
networks), starting at ID 50,000,000. Each new asset must be created with an ID that is one
greater than the last asset created. The next ID can be fetched from the `NextAssetId`
storage item of the assets pallet. An empty `NextAssetId` storage item indicates no
constraint on the next asset ID and can serve as a feature flag for this release.


crates:
- name: asset-hub-rococo-runtime
bump: major
- name: asset-hub-westend-runtime
bump: major
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