# 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>
* Dex and payment by dex in westmint
* Wrap U256 type for now
(to support required traits.)
* cargo fmt
* We can now use U256
* Rename PromotedBalance
* name change
* Updating the code to master.
TODO: handle dust!
* cargo fmt
* Minimising changes and step towards getting benchmarks compiling
(still a From<u32> bound in the pallet)
* minimise diff
* Update parachains/runtimes/assets/westmint/src/lib.rs
Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>
* Update parachains/runtimes/assets/westmint/src/lib.rs
Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>
* Update parachains/common/src/impls.rs
Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>
* Fix benchmark build
* Add in AssetConversionAPI
* Handle dust
* cargo fmt
* Don't need to be explicit that it's AccountId32
* remove pool setup fee
(Asset deposit fees are a sufficient anti-spam measure)
* More natural way to specify native
* cargo fmt
* Update parachains/runtimes/assets/westmint/src/lib.rs
* Additional required impls
* either form of multilocation should be acceptable.
* add call filter exclusion
* Fix typo & try_convert now fails if native is converted
* merge master fixup
* Fix: HoldReason should be there.
* Box MultiAssetId
Otherwise it blows out the Call enum memory size.
* cargo fmt
* update lock file
* add std feature, update lock file
* need to turn on std on common
* adding in westmint tests
* WeightToFee must be from the destination chain.
* cargo fmt
* account for higher ED on westmint
* type removed as not used
* cargo fmt
* remove unused import
* minimising diff
* import needed only with feature enabled
* use multilocation contains
* move the impls to separate file
* simplify on conversion
* simplify on reverse conversion also.
* rename var
* clippy
* removed dead code
* cargo fmt
* Use pay by swap
* review suggestions
* cargo fmt
* Update parachains/runtimes/assets/asset-hub-westend/src/lib.rs
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
* add benchmarks for new assets pallet
* revert common/src changes
* need a concrete id
* more fixes
* lock
---------
Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com>
Co-authored-by: joepetrowski <joe@parity.io>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
* primitives/core: Derive scale_info::TypeInfo for runtime APIs
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
* parachains: Derive scale_info::TypeInfo for FungiblesAccessError
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
* parachains: Fix `TypeInfo` import path
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
* update lockfile for {"polkadot", "substrate"}
* Adjust testing for the new API
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
* Adjust deprecated methods
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
---------
Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
Co-authored-by: parity-processbot <>
Francisco Aguirre