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>
Snowbridge ·
[
]
(https://codecov.io/gh/Snowfork/snowbridge)
Snowbridge is a trustless bridge between Polkadot and Ethereum. For documentation, visit https://docs.snowbridge.network.
Components
Parachain
Polkadot parachain and our pallets. See parachain/README.md.
Contracts
Ethereum contracts and unit tests. See contracts/README.md
Relayer
Off-chain relayer services for relaying messages between Polkadot and Ethereum. See relayer/README.md
Local Testnet
Scripts to provision a local testnet, running the above services to bridge between local deployments of Polkadot and Ethereum. See web/packages/test/README.md.
Smoke Tests
Integration tests for our local testnet. See smoketest/README.md.
Development
We use the Nix package manager to provide a reproducible and maintainable developer environment.
After installing nix Nix, enable flakes:
mkdir -p ~/.config/nix
echo 'experimental-features = nix-command flakes' >> ~/.config/nix/nix.conf
Then activate a developer shell in the root of our repo, where
flake.nix is located:
nix develop
Also make sure to run this initialization script once:
scripts/init.sh
Support for code editors
To ensure your code editor (such as VS Code) can execute tools in the nix shell, startup your editor within the interactive shell.
Example for VS Code:
nix develop
code .
Custom shells
The developer shell is bash by default. To preserve your existing shell:
nix develop --command $SHELL
Automatic developer shells
To automatically enter the developer shell whenever you open the project, install
direnv and use the template .envrc:
cp .envrc.example .envrc
direnv allow
Upgrading the Rust toolchain
Sometimes we would like to upgrade rust toolchain. First update parachain/rust-toolchain.toml as required and then
update flake.lock running
nix flake lock --update-input rust-overlay
Troubleshooting
Check the contents of all .envrc files.
Remove untracked files:
git clean -idx
Ensure that the current Rust toolchain is the one selected in scripts/init.sh.
Ensure submodules are up-to-date:
git submodule update
Check untracked files & directories:
git clean -ndx | awk '{print $3}'
After removing node_modules directories (eg. with git clean above), clear the pnpm cache:
pnpm store prune
Check Nix config in ~/.config/nix/nix.conf.
Run a pure developer shell (note that this removes access to your local tools):
nix develop -i --pure-eval
Security
The security policy and procedures can be found in SECURITY.md.