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# Description ## Summary Previously, the `pallet_xcm::do_reserve_transfer_assets` and `pallet_xcm::do_teleport_assets` functions relied on weight estimation for remote chain execution, which was based on guesswork derived from the local chain. This approach led to complications for runtimes that did not provide or support specific [XCM configurations](https://github.com/paritytech/polkadot-sdk/blob/7cbe0c76ef8fd2aabf9f07de0156941ce3ed44b0/polkadot/xcm/xcm-executor/src/config.rs#L43-L47) for `IsReserve` or `IsTeleporter`. Consequently, such runtimes had to resort to implementing hard-coded weights for XCM instructions like `reserve_asset_deposited` or `receive_teleported_asset` to support extrinsics such as `pallet_xcm::reserve_transfer_assets` and `pallet_xcm::teleport_assets`, which depended on remote weight estimation. The issue of remote weight estimation was addressed and resolved by [Pull Request #1645](https://github.com/paritytech/polkadot-sdk/pull/1645), which removed the need for remote weight estimation. ## Solution As a continuation of this improvement, the current PR proposes further cleanup by removing unnecessary hard-coded values and rectifying benchmark results with `Weight::MAX` that previously used `T::BlockWeights::get().max_block` as an override for unsupported XCM instructions like `ReserveAssetDeposited` and `ReceiveTeleportedAsset`. ## Questions - [x] Can we remove now also `Hardcoded till the XCM pallet is fixed` for `deposit_asset`? E.g. for AssetHubKusama [here](https://github.com/paritytech/polkadot-sdk/blob/7cbe0c76ef8fd2aabf9f07de0156941ce3ed44b0/cumulus/parachains/runtimes/assets/asset-hub-kusama/src/weights/xcm/mod.rs#L129-L134) - [x] Are comments like [this](https://github.com/paritytech/polkadot-sdk/blob/7cbe0c76ef8fd2aabf9f07de0156941ce3ed44b0/polkadot/runtime/kusama/src/weights/xcm/mod.rs#L94) `// Kusama doesn't support ReserveAssetDeposited, so this benchmark has a default weight` still relevant? Shouldnt be removed/changed? ## TODO - [x] `bench bot` regenerate xcm weights for all runtimes - [x] remove hard-coded stuff from system parachain weight files - [ ] when merged, open `polkadot-fellow/runtimes` PR ## References Fixes #1132 Closes #1132 Old polkadot repo [PR](https://github.com/paritytech/polkadot/pull/7546) --------- Co-authored-by: command-bot <>
Parachains
This directory is the home of Parity-developed parachain runtimes. This directory is runtime focused, and does not include builds of parachain nodes.
The general internal structure is:
chain-specs: Chain specs for the runtimes contained in its sibling dirruntimes.common: Common configurations,impls, etc. used by several parachain runtimes.integration-tests: Integration tests to test parachain interactions via XCM.pallets: FRAME pallets that are specific to parachains.runtimes: The entry point for parachain runtimes.
System Parachains
The runtimes directory includes many, but is not limited to,
system parachains. Likewise, not all
system parachains are in this repo.
Releases
The project maintainers generally try to release a set of parachain runtimes for each Polkadot Relay Chain runtime release.