mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-05 16:47:25 +00:00
Francisco Aguirre
8428f678fe
# 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>
65 lines
2.2 KiB
Rust
65 lines
2.2 KiB
Rust
// Copyright (C) Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Polkadot is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//! Various implementations for the `MatchesFungible` trait.
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use frame_support::traits::Get;
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use sp_std::marker::PhantomData;
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use xcm::latest::{
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Asset, AssetId, AssetInstance,
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Fungibility::{Fungible, NonFungible},
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Location,
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};
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use xcm_executor::traits::{MatchesFungible, MatchesNonFungible};
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/// Converts a `Asset` into balance `B` if its id is equal to that
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/// given by `T`'s `Get`.
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///
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/// # Example
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///
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/// ```
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/// use xcm::latest::{Location, Parent};
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/// use staging_xcm_builder::IsConcrete;
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/// use xcm_executor::traits::MatchesFungible;
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///
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/// frame_support::parameter_types! {
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/// pub TargetLocation: Location = Parent.into();
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/// }
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///
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/// # fn main() {
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/// let asset = (Parent, 999).into();
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/// // match `asset` if it is a concrete asset in `TargetLocation`.
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/// assert_eq!(<IsConcrete<TargetLocation> as MatchesFungible<u128>>::matches_fungible(&asset), Some(999));
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/// # }
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/// ```
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pub struct IsConcrete<T>(PhantomData<T>);
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impl<T: Get<Location>, B: TryFrom<u128>> MatchesFungible<B> for IsConcrete<T> {
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fn matches_fungible(a: &Asset) -> Option<B> {
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match (&a.id, &a.fun) {
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(AssetId(ref id), Fungible(ref amount)) if id == &T::get() => (*amount).try_into().ok(),
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_ => None,
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}
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}
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}
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impl<T: Get<Location>, I: TryFrom<AssetInstance>> MatchesNonFungible<I> for IsConcrete<T> {
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fn matches_nonfungible(a: &Asset) -> Option<I> {
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match (&a.id, &a.fun) {
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(AssetId(id), NonFungible(instance)) if id == &T::get() => (*instance).try_into().ok(),
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_ => None,
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}
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}
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}
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