Files
pezkuwi-subxt/polkadot/xcm/pallet-xcm-benchmarks/src/generic/mod.rs
T
Francisco Aguirre 8428f678fe XCMv4 (#1230)
# Note for reviewer

Most changes are just syntax changes necessary for the new version.
Most important files should be the ones under the `xcm` folder.

# Description 

Added XCMv4.

## Removed `Multi` prefix
The following types have been renamed:
- MultiLocation -> Location
- MultiAsset -> Asset
- MultiAssets -> Assets
- InteriorMultiLocation -> InteriorLocation
- MultiAssetFilter -> AssetFilter
- VersionedMultiAsset -> VersionedAsset
- WildMultiAsset -> WildAsset
- VersionedMultiLocation -> VersionedLocation

In order to fix a name conflict, the `Assets` in `xcm-executor` were
renamed to `HoldingAssets`, as they represent assets in holding.

## Removed `Abstract` asset id

It was not being used anywhere and this simplifies the code.

Now assets are just constructed as follows:

```rust
let asset: Asset = (AssetId(Location::new(1, Here)), 100u128).into();
```

No need for specifying `Concrete` anymore.

## Outcome is now a named fields struct

Instead of

```rust
pub enum Outcome {
  Complete(Weight),
  Incomplete(Weight, Error),
  Error(Error),
}
```

we now have

```rust
pub enum Outcome {
  Complete { used: Weight },
  Incomplete { used: Weight, error: Error },
  Error { error: Error },
}
```

## Added Reanchorable trait

Now both locations and assets implement this trait, making it easier to
reanchor both.

## New syntax for building locations and junctions

Now junctions are built using the following methods:

```rust
let location = Location {
    parents: 1,
    interior: [Parachain(1000), PalletInstance(50), GeneralIndex(1984)].into()
};
```

or

```rust
let location = Location::new(1, [Parachain(1000), PalletInstance(50), GeneralIndex(1984)]);
```

And they are matched like so:

```rust
match location.unpack() {
  (1, [Parachain(id)]) => ...
  (0, Here) => ...,
  (1, [_]) => ...,
}
```

This syntax is mandatory in v4, and has been also implemented for v2 and
v3 for easier migration.

This was needed to make all sizes smaller.

# TODO
- [x] Scaffold v4
- [x] Port github.com/paritytech/polkadot/pull/7236
- [x] Remove `Multi` prefix
- [x] Remove `Abstract` asset id

---------

Co-authored-by: command-bot <>
Co-authored-by: Keith Yeung <kungfukeith11@gmail.com>
2024-01-16 18:18:04 +00:00

108 lines
4.4 KiB
Rust

// Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.
// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
pub use pallet::*;
#[cfg(feature = "runtime-benchmarks")]
pub mod benchmarking;
#[cfg(test)]
mod mock;
#[frame_support::pallet]
pub mod pallet {
use frame_benchmarking::BenchmarkError;
use frame_support::{dispatch::GetDispatchInfo, pallet_prelude::Encode};
use sp_runtime::traits::Dispatchable;
use xcm::latest::{Asset, Assets, InteriorLocation, Junction, Location, NetworkId, Response};
#[pallet::config]
pub trait Config<I: 'static = ()>: frame_system::Config + crate::Config {
type RuntimeCall: Dispatchable<RuntimeOrigin = Self::RuntimeOrigin>
+ GetDispatchInfo
+ From<frame_system::Call<Self>>
+ Encode;
/// The type of `fungible` that is being used under the hood.
///
/// This is useful for testing and checking.
type TransactAsset: frame_support::traits::fungible::Mutate<Self::AccountId>;
/// The response which causes the most runtime weight.
fn worst_case_response() -> (u64, Response);
/// The pair of asset collections which causes the most runtime weight if demanded to be
/// exchanged.
///
/// The first element in the returned tuple represents the assets that are being exchanged
/// from, whereas the second element represents the assets that are being exchanged to.
///
/// If set to `Err`, benchmarks which rely on an `exchange_asset` will be skipped.
fn worst_case_asset_exchange() -> Result<(Assets, Assets), BenchmarkError>;
/// A `(Location, Junction)` that is one of the `UniversalAliases` configured by the
/// XCM executor.
///
/// If set to `Err`, benchmarks which rely on a universal alias will be skipped.
fn universal_alias() -> Result<(Location, Junction), BenchmarkError>;
/// The `Location` and `RuntimeCall` used for successful transaction XCMs.
///
/// If set to `Err`, benchmarks which rely on a `transact_origin_and_runtime_call` will be
/// skipped.
fn transact_origin_and_runtime_call(
) -> Result<(Location, <Self as crate::generic::Config<I>>::RuntimeCall), BenchmarkError>;
/// A valid `Location` we can successfully subscribe to.
///
/// If set to `Err`, benchmarks which rely on a `subscribe_origin` will be skipped.
fn subscribe_origin() -> Result<Location, BenchmarkError>;
/// Return an origin, ticket, and assets that can be trapped and claimed.
fn claimable_asset() -> Result<(Location, Location, Assets), BenchmarkError>;
/// Return an unlocker, owner and assets that can be locked and unlocked.
fn unlockable_asset() -> Result<(Location, Location, Asset), BenchmarkError>;
/// A `(Location, NetworkId, InteriorLocation)` we can successfully export message
/// to.
///
/// If set to `Err`, benchmarks which rely on `export_message` will be skipped.
fn export_message_origin_and_destination(
) -> Result<(Location, NetworkId, InteriorLocation), BenchmarkError>;
/// A `(Location, Location)` that is one of the `Aliasers` configured by the XCM
/// executor.
///
/// If set to `Err`, benchmarks which rely on a universal alias will be skipped.
fn alias_origin() -> Result<(Location, Location), BenchmarkError>;
/// Returns a valid pallet info for `ExpectPallet` or `QueryPallet` benchmark.
///
/// By default returns `frame_system::Pallet` info with expected pallet index `0`.
fn valid_pallet() -> frame_support::traits::PalletInfoData {
frame_support::traits::PalletInfoData {
index: <frame_system::Pallet<Self> as frame_support::traits::PalletInfoAccess>::index(),
name: <frame_system::Pallet<Self> as frame_support::traits::PalletInfoAccess>::name(),
module_name: <frame_system::Pallet<Self> as frame_support::traits::PalletInfoAccess>::module_name(),
crate_version: <frame_system::Pallet<Self> as frame_support::traits::PalletInfoAccess>::crate_version(),
}
}
}
#[pallet::pallet]
pub struct Pallet<T, I = ()>(_);
}