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    • Francisco Aguirre's avatar
      XCMv4 (#1230) · 8428f678
      Francisco Aguirre authored 
      

# 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: default avatarKeith Yeung <[email protected]>
      8428f678
    • Andrei Eres's avatar
      subsystem-bench: cache misses profiling (#2893) · ec7bfae0
      Andrei Eres authored 
      ## Why we need it
To provide another level of understanding to why polkadot's subsystems
may perform slower than expected. Cache misses occur when processing
large amounts of data, such as during availability recovery.

## Why Cachegrind
Cachegrind has many drawbacks: it is slow, it uses its own cache
simulation, which is very basic. But unlike `perf`, which is a great
tool, Cachegrind can run in a virtual machine. This means we can easily
run it in remote installations and even use it in CI/CD to catch
possible regressions.

Why Cachegrind and not Callgrind, another part of Valgrind? It is simply
empirically proven that profiling runs faster with Cachegrind.

## First results
First results have been obtained while testing of the approach. Here is
an example.

```
$ target/testnet/subsystem-bench --n-cores 10 --cache-misses data-availability-read
$ cat cachegrind_report.txt
I refs:        64,622,081,485
I1  misses:         3,018,168
LLi misses:           437,654
I1  miss rate:           0.00%
LLi miss rate:           0.00%

D refs:        12,161,833,115  (9,868,356,364 rd   + 2,293,476,751 wr)
D1  misses:       167,940,701  (   71,060,073 rd   +    96,880,628 wr)
LLd misses:        33,550,018  (   16,685,853 rd   +    16,864,165 wr)
D1  miss rate:            1.4% (          0.7%     +           4.2%  )
LLd miss rate:            0.3% (          0.2%     +           0.7%  )

LL refs:          170,958,869  (   74,078,241 rd   +    96,880,628 wr)
LL misses:         33,987,672  (   17,123,507 rd   +    16,864,165 wr)
LL miss rate:             0.0% (          0.0%     +           0.7%  )
```

The CLI output shows that 1.4% of the L1 data cache missed, which is not
so bad, given that the last-level cache had that data most of the time
missing only 0.3%. Instruction data of the L1 has 0.00% misses of the
time. Looking at an output file with `cg_annotate` shows that most of
the misses occur during reed-solomon, which is expected.
      ec7bfae0
    • dependabot[bot]'s avatar
      Bump walkdir from 2.3.3 to 2.4.0 (#2910) · 82c057ee
      dependabot[bot] authored 
      Bumps [walkdir](https://github.com/BurntSushi/walkdir) from 2.3.3 to
2.4.0.
<details>
<summary>Commits</summary>
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href="https://github.com/BurntSushi/walkdir/commit/037c5e16ec4d8b3eacb51f077cfdab7a356e8412"><code>037c5e1</code></a>
2.4.0</li>
<li><a
href="https://github.com/BurntSushi/walkdir/commit/dcc527d8326fae4272b66bb55f433a302a8cad6f"><code>dcc527d</code></a>
api: add follow_root_links() option to WalkDir</li>
<li><a
href="https://github.com/BurntSushi/walkdir/commit/61a185fe49df24966acdec732f5a4b44a0475031"><code>61a185f</code></a>
ci: use latest OS versions</li>
<li>See full diff in <a
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      82c057ee
    • Xavier Lau's avatar
      CI check features (#1708) · 05cfb02b
      Xavier Lau authored 
      To resolve issue #1136.

This is a cross verification against zepter.

- [cargo-featalign](https://github.com/hack-ink/cargo-featalign):
Verifies the proper propagation of all features.
- [zepter](https://github.com/ggwpez/zepter): Checks for accidentally
enabled features.

cc @ggwpez

 

---
Switch to a new branch. Original PR #1537.

---------

Signed-off-by: default avatarXavier Lau <[email protected]>
Signed-off-by: default avatarOliver Tale-Yazdi <[email protected]>
Co-authored-by: default avatarOliver Tale-Yazdi <[email protected]>
Co-authored-by: default avatarChevdor <[email protected]>
      05cfb02b
    • Dónal Murray's avatar
      Bump rococo relay and coretime-rococo to 1.6 (#2913) · a42a47f8
      Dónal Murray authored 
      Co-authored-by: command-bot <>
      a42a47f8
    • Muharem Ismailov's avatar
      XCM WeightTrader: Swap Fee Asset for Native Asset (#1845) · 2cb39f8d
      Muharem Ismailov authored 
      Implements an XCM executor `WeightTrader`, facilitating fee payments in
any asset that can be exchanged for a native asset.

A few constraints need to be observed:
- `buy_weight` and `refund` operations must be atomic, as another weight
trader implementation might be attempted in case of failure.
- swap credit must be utilized since there isn’t an account to which an
asset of some class can be deposited with a guarantee to meet the
existential deposit requirement. Also, operating with credits enhances
the efficiency of the weight trader -
https://github.com/paritytech/polkadot-sdk/pull/1677

related PRs:
- (depends) https://github.com/paritytech/polkadot-sdk/pull/2031
- (depends) https://github.com/paritytech/polkadot-sdk/pull/1677
- (caused) https://github.com/paritytech/polkadot-sdk/pull/1847
- (caused) https://github.com/paritytech/polkadot-sdk/pull/1876

// DONE: impl `OnUnbalanced` for a `fungible/s` credit
// DONE: make the trader free from a concept of a native currency and
drop few fallible conversions. related issue -
https://github.com/paritytech/polkadot-sdk/issues/1842


// DONE: tests

---------

Co-authored-by: default avatarjoe petrowski <[email protected]>
Co-authored-by: default avatarLiam Aharon <[email protected]>
      2cb39f8d
    • dependabot[bot]'s avatar
      Bump Swatinem/rust-cache from 2.7.2 to 2.7.3 (#2925) · 4c4963a1
      dependabot[bot] authored 
      Bumps [Swatinem/rust-cache](https://github.com/swatinem/rust-cache) from
2.7.2 to 2.7.3.
<details>
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<blockquote>
<h2>v2.7.3</h2>
<ul>
<li>Work around upstream problem that causes cache saving to hang for
minutes.</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/Swatinem/rust-cache/compare/v2.7.2...v2.7.3">https://github.com/Swatinem/rust-cache/compare/v2.7.2...v2.7.3</a></p>
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<li>Only key by <code>Cargo.toml</code> and <code>Cargo.lock</code>
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<h2>2.7.1</h2>
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<li>Update toml parser to fix parsing errors.</li>
</ul>
<h2>2.7.0</h2>
<ul>
<li>Properly cache <code>trybuild</code> tests.</li>
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<h2>2.6.2</h2>
<ul>
<li>Fix <code>toml</code> parsing.</li>
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<li>Fix hash contributions of
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<li>Add &quot;buildjet&quot; as a second <code>cache-provider</code>
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<li>Clean up sparse registry index.</li>
<li>Do not clean up src of <code>-sys</code> crates.</li>
<li>Remove <code>.cargo/credentials.toml</code> before saving.</li>
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<h2>2.5.1</h2>
<ul>
<li>Fix hash contribution of <code>Cargo.lock</code>.</li>
</ul>
<h2>2.5.0</h2>
<ul>
<li>feat: Rm workspace crates version before caching.</li>
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<h2>2.4.0</h2>
<ul>
<li>Fix cache key stability.</li>
<li>Use 8 character hash components to reduce the key length, making it
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</ul>
<h2>2.3.0</h2>
<ul>
<li>Add <code>cache-all-crates</code> option, which enables caching of
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    • Bastian Köcher's avatar
      Some random fixes (#2936) · 1c2db174
      Bastian Köcher authored 
      - Do not disable `std` feature in the integration tests
- `contracts-fixtures` test should only check for `riscv` build when the
feature is enabled
      1c2db174
  9. Jan 15, 2024