Asset conversion nits (#2860)

* [asset-conv] Unused Balances type

* [asset-conv] native asset change

* Dedicated `AssetBalance` type for `pallet_assets` instances

* Improved local vs foreign asset handling + test for not allowing pool_assets in pool

* Removed `into_multiasset_id`

* Fix

* Refactor

* Fixed create_pool for benchmark with LocalAndForeignAssets (finally found it)

* ".git/.scripts/commands/fmt/fmt.sh"

* Revert

* fmt

* Migrates pools with `MultiLocation { parents: 0, interior: Here }` to `MultiLocation { parents: 1, interior: Here }`

* Allow `set_storage` for `AllowMultiAssetPools` / `LiquidityWithdrawalFee`

* Benchmarks work

* Removed comment + more defensive migration

* `T::Currency::transfer` -> `Balances::transfer_all` in migration

* Change pool_id in migration

* Update parachains/runtimes/assets/asset-hub-westend/src/lib.rs

* Bump substrate (manually)

* Bump polkadot

* Fixes from polkadot + clippy

* Fix for xcm-emulator tests (thank you Nacho)

---------

Co-authored-by: command-bot <>
Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>

cumulus/parachains/runtimes/assets/asset-hub-polkadot/src/lib.rs

@@ -1121,6 +1121,7 @@ impl_runtime_apis! {
 					MultiAsset { fun: Fungible(UNITS), id: Concrete(DotLocation::get()) },
 				));
 				pub const CheckedAccount: Option<(AccountId, xcm_builder::MintLocation)> = None;
+				pub const TrustedReserve: Option<(MultiLocation, MultiAsset)> = None;
 			}
 
 			impl pallet_xcm_benchmarks::fungible::Config for Runtime {
@@ -1128,6 +1129,7 @@ impl_runtime_apis! {
 
 				type CheckedAccount = CheckedAccount;
 				type TrustedTeleporter = TrustedTeleporter;
+				type TrustedReserve = TrustedReserve;
 
 				fn get_multi_asset() -> MultiAsset {
 					MultiAsset {