# 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 <[email protected]>

- Do not disable `std` feature in the integration tests
- `contracts-fixtures` test should only check for `riscv` build when the
feature is enabled

Integration tests in ink!:
https://github.com/paritytech/ink/tree/master/integration-tests/sr25519-verification

- Translate all pallet-contracts fixtures from `wat` to Rust files.
- Fix read_sandbox_memory_as to not use MaxEncodedLen as this could
break if used with types with a non-fixed encoded len.

---------

Co-authored-by: alvicsam <[email protected]>
Co-authored-by: Alexander Samusev <[email protected]>
Co-authored-by: Alexander Theißen <[email protected]>
Co-authored-by: command-bot <>

bump polkavm-x deps to 0.4.0

- Keep feature name short s/riscv-experimental/riscv
- Add to feature to CI build

---------

Co-authored-by: Bastian Köcher <[email protected]>

The [chainSpec RPC API from the v2
spec](https://paritytech.github.io/json-rpc-interface-spec/api/chainSpec.html)
was only added to substrate-node and should be added to polkadot as well

/cc @lexnv

This disables building the RISCV fixtures by default. They still require
a custom build rustc version. When there are actual tests for RISCV, the
feature can be enabled in CI. Also fixes some unwraps that assume again
that people are using rustup...

Bumps the known_good_semver group with 4 updates:
[serde](https://github.com/serde-rs/serde),
[serde_json](https://github.com/serde-rs/json),
[clap](https://github.com/clap-rs/clap) and
[syn](https://github.com/dtolnay/syn).

Updates `serde` from 1.0.194 to 1.0.195
<details>
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<li><a
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Release 1.0.195</li>
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<li><a
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<li><a
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Fix new dead_code warning in tuple struct and tuple variant remote
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<li><a
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Add FIXME to fix dead_code warning when using serde(remote)</li>
<li><a
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Work around dead_code warning in tests</li>
<li><a
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<li><a
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Fill in omitted patterns for GenericArguments match</li>
<li><a
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Pick up changes to non_exhaustive_omitted_patterns lint</li>
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Updates `serde_json` from 1.0.110 to 1.0.111
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<h2>[4.4.13] - 2024-01-04</h2>
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Correct safety docs</li>
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chore: Release</li>
<li><a
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docs: Update changelog</li>
<li><a
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<li><a
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Updates `syn` from 2.0.47 to 2.0.48
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<h2>2.0.48</h2>
<ul>
<li>Improve error message on unexpected token after <code>else</code>
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Release 2.0.48</li>
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Fix error message on unexpected token after 'else'</li>
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Merge pull request <a
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<li><a
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Pick up changes to non_exhaustive_omitted_patterns lint</li>
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Follow up from #2347 this time to verify that fixtures build to RISC-V

---------

Co-authored-by: alvicsam <[email protected]>
Co-authored-by: Alexander Samusev <[email protected]>
Co-authored-by: Alexander Theißen <[email protected]>

Bumps the known_good_semver group with 2 updates:
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Updates `syn` from 2.0.41 to 2.0.43
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Generalize snapshot parsing to types that do not implement Parse</li>
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Fill in unsafe blocks inside unsafe functions</li>
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</details>

Signed-off-by: dependabot[bot] <[email protected]>
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Many clippy lints usually enforced by `-Dcomplexity` and `-Dcorrectness`
are not caught by CI as they are gated by `features`, like
`runtime-benchmarks`, while the clippy CI job runs with only the default
features for all targets.

This PR also adds a CI step to run clippy with `--all-features` to
ensure the code quality is maintained behind feature gates from now on.

To improve local development, clippy lints are downgraded to warnings,
but they still will result in an error at CI due to the `-Dwarnings`
rustflag.

---------

Co-authored-by: Liam Aharon <[email protected]>

This PR contains just a few clippy fixes and nits, which are, however,
relaxed by workspace clippy settings here:
https://github.com/paritytech/polkadot-sdk/blob/master/Cargo.toml#L483-L506

---------

Co-authored-by: Dmitry Sinyavin <[email protected]>
Co-authored-by: ordian <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: Bastian Köcher <[email protected]>

Bumps the known_good_semver group with 1 update:
[syn](https://github.com/dtolnay/syn).

Updates `syn` from 2.0.40 to 2.0.41
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.41</h2>
<ul>
<li>Support parsing syn::Field in <code>parse_quote!</code> (<a
href="https://redirect.github.com/dtolnay/syn/issues/1548">#1548</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/63b17012ab20ff72f3e49aaf821719a866b1a352"><code>63b1701</code></a>
Release 2.0.41</li>
<li><a
href="https://github.com/dtolnay/syn/commit/920ab7d6a061921d03541d86d7ac8daaf864bb7b"><code>920ab7d</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1548">#1548</a>
from dtolnay/parsequotefield</li>
<li><a
href="https://github.com/dtolnay/syn/commit/5e1592408c3bcda68db10cd054f9d87e9e480f9b"><code>5e15924</code></a>
Test parse_quote implementation for Field</li>
<li><a
href="https://github.com/dtolnay/syn/commit/c268c6793f8a71ac2f3e8ee80201701e4352b407"><code>c268c67</code></a>
Support parsing Field in parse_quote</li>
<li><a
href="https://github.com/dtolnay/syn/commit/2ab0f6ae4b47d133c828d9123e86a50565a95447"><code>2ab0f6a</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1547">#1547</a>
from dtolnay/testparsequote</li>
<li><a
href="https://github.com/dtolnay/syn/commit/46172a41a478920ff23c9e370a5b922fa984829d"><code>46172a4</code></a>
Add parse_quote tests</li>
<li><a
href="https://github.com/dtolnay/syn/commit/0fcdad044f330f4c32e2f3b1230271669d1951ea"><code>0fcdad0</code></a>
Support punctuated Pairs iterator in snapshot tests</li>
<li><a
href="https://github.com/dtolnay/syn/commit/06161ba80283edf6f741dfc86c91f6985297d168"><code>06161ba</code></a>
Update test suite to nightly-2023-12-12</li>
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In the move from the old `Currency` traits to the new `fungible/s`
family of traits, we already had the `FungiblesAdapter` and
`NonFungiblesAdapter` for multiple fungible and non fungible assets
respectively. However, for handling only one fungible asset, we were
missing a `FungibleAdapter`, and so used the old `CurrencyAdapter`
instead. This PR aims to fill in that gap, and provide the new adapter
for more updated examples.

I marked the old `CurrencyAdapter` as deprecated as part of this PR, and
I'll change it to the new `FungibleAdapter` in a following PR.
The two stages are separated so as to not bloat this PR with some name
fixes in tests.

---------

Co-authored-by: command-bot <>

We currently use a bit of a hack in `.cargo/config` to make sure that
clippy isn't too annoying by specifying the list of lints.

There is now a stable way to define lints for a workspace. The only down
side is that every crate seems to have to opt into this so there's a
*few* files modified in this PR.

Dependencies:

- [x] PR that upgrades CI to use rust 1.74 is merged.

---------

Co-authored-by: joe petrowski <[email protected]>
Co-authored-by: Branislav Kontur <[email protected]>
Co-authored-by: Liam Aharon <[email protected]>

## Summary

This PR turns on `-D warnings` for `cargo-check-each-crate job` job to
fail on warnings e.g. like this:
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673130

Before this PR, there was a warning and `cargo-check-each-crate` job did
not fail:
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4641444
```
warning: unused import: `ToTokens`
  --> substrate/primitives/api/proc-macro/src/utils.rs:22:34
   |
22 | use quote::{format_ident, quote, ToTokens};
   |                                  ^^^^^^^^
   |
   = note: `#[warn(unused_imports)]` on by default
warning: `sp-api-proc-macro` (lib) generated 1 warning (run `cargo fix --lib -p sp-api-proc-macro` to apply 1 suggestion)
```

Fixes on the way:
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4641444
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673265
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673410
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673681
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673836
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4673941
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4674256
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/4679328



## Questions
- [ ] why does this check triggers only `cargo check --locked`?
`--all-features` or `--all-targets` are not needed? Or aren't they
avoided intentionally?

---------

Co-authored-by: command-bot <>

Bumps the known_good_semver group with 2 updates:
[clap](https://github.com/clap-rs/clap) and
[syn](https://github.com/dtolnay/syn).

Updates `clap` from 4.4.10 to 4.4.11
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/clap-rs/clap/releases">clap's
releases</a>.</em></p>
<blockquote>
<h2>v4.4.11</h2>
<h2>[4.4.11] - 2023-12-04</h2>
<h3>Features</h3>
<ul>
<li>Add <code>Command::mut_group</code></li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/clap-rs/clap/blob/master/CHANGELOG.md">clap's
changelog</a>.</em></p>
<blockquote>
<h2>[4.4.11] - 2023-12-04</h2>
<h3>Features</h3>
<ul>
<li>Add <code>Command::mut_group</code></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/clap-rs/clap/commit/d092896d61fd73a5467db85eac035a9ce2ddbc60"><code>d092896</code></a>
chore: Release</li>
<li><a
href="https://github.com/clap-rs/clap/commit/c76a713f8bd40a54a58e8c1d2300a6792f1b79d5"><code>c76a713</code></a>
chore: Update lockfile</li>
<li><a
href="https://github.com/clap-rs/clap/commit/b99d17bb0b78b667659982252e8973174e93ae7d"><code>b99d17b</code></a>
docs: Update changelog</li>
<li><a
href="https://github.com/clap-rs/clap/commit/b47f8da4d857dd653915ce772757d4b996a36477"><code>b47f8da</code></a>
Merge pull request <a
href="https://redirect.github.com/clap-rs/clap/issues/5247">#5247</a>
from epage/group</li>
<li><a
href="https://github.com/clap-rs/clap/commit/2e7c9d11a84b5008e2b42b4df323557a31bb0337"><code>2e7c9d1</code></a>
Merge pull request <a
href="https://redirect.github.com/clap-rs/clap/issues/5194">#5194</a>
from c19/patch-1</li>
<li><a
href="https://github.com/clap-rs/clap/commit/37917be0b75d5cd667cd37db6ea5c6bac837c674"><code>37917be</code></a>
feat: Add Command::mut_group</li>
<li><a
href="https://github.com/clap-rs/clap/commit/cf7a0272cc1d55d139983d4408e8bedab51338ad"><code>cf7a027</code></a>
chore: Update from '_rust/main'</li>
<li><a
href="https://github.com/clap-rs/clap/commit/8c836eaa9d9279df467991a3b8463d748b515a0a"><code>8c836ea</code></a>
Merge pull request <a
href="https://redirect.github.com/clap-rs/clap/issues/10">#10</a> from
epage/renovate/migrate-config</li>
<li><a
href="https://github.com/clap-rs/clap/commit/598c6244983fb392457f3fbec9badf25fab6d051"><code>598c624</code></a>
chore(config): migrate config .github/renovate.json5</li>
<li>See full diff in <a
href="https://github.com/clap-rs/clap/compare/v4.4.10...v4.4.11">compare
view</a></li>
</ul>
</details>
<br />

Updates `syn` from 2.0.39 to 2.0.40
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.40</h2>
<ul>
<li>Fix some edge cases of handling None-delimited groups in expression
parser (<a
href="https://redirect.github.com/dtolnay/syn/issues/1539">#1539</a>, <a
href="https://redirect.github.com/dtolnay/syn/issues/1541">#1541</a>, <a
href="https://redirect.github.com/dtolnay/syn/issues/1542">#1542</a>, <a
href="https://redirect.github.com/dtolnay/syn/issues/1543">#1543</a>, <a
href="https://redirect.github.com/dtolnay/syn/issues/1544">#1544</a>, <a
href="https://redirect.github.com/dtolnay/syn/issues/1545">#1545</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/cf7f40a96a7329fb4215a7a1d8d9e7c93439b169"><code>cf7f40a</code></a>
Release 2.0.40</li>
<li><a
href="https://github.com/dtolnay/syn/commit/1ce8ccf5cd92824d1058019c0ae95b0616f6ac01"><code>1ce8ccf</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1538">#1538</a>
from dtolnay/testinvisible</li>
<li><a
href="https://github.com/dtolnay/syn/commit/d06bff8883e794c0d9d5fe2998210dec113b6eff"><code>d06bff8</code></a>
Add test for parsing Delimiter::None in expressions</li>
<li><a
href="https://github.com/dtolnay/syn/commit/9ec66d42bba0da0041ab6448604b72f673e185f1"><code>9ec66d4</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1545">#1545</a>
from dtolnay/groupedlet</li>
<li><a
href="https://github.com/dtolnay/syn/commit/384621acc640779ee4a8250317c26a42e8ceef90"><code>384621a</code></a>
Fix None-delimited let expression in stmt position</li>
<li><a
href="https://github.com/dtolnay/syn/commit/5325b6d1711c1c9c6787cb6239b472b5f8b5daaf"><code>5325b6d</code></a>
Add test of let expr surrounded in None-delimited group</li>
<li><a
href="https://github.com/dtolnay/syn/commit/0ddfc27cf79573db0b5533c583ff895e9c7f3f72"><code>0ddfc27</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1544">#1544</a>
from dtolnay/nonedelimloop</li>
<li><a
href="https://github.com/dtolnay/syn/commit/9c99b3f62ecebb2ac22f8ed99039934b0a18d0e6"><code>9c99b3f</code></a>
Fix stmt boundary after None-delimited group containing loop</li>
<li><a
href="https://github.com/dtolnay/syn/commit/2781584ea868cce6c9ae750bc442e3b4b2dfd887"><code>2781584</code></a>
Add test of None-delimited group containing loop in match arm</li>
<li><a
href="https://github.com/dtolnay/syn/commit/d33292808432c8530b53c951f2780d7128c4bd0b"><code>d332928</code></a>
Simplify token stream construction in Delimiter::None tests</li>
<li>Additional commits viewable in <a
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The build script was assuming that `rustup` is installed, which breaks
the build on systems that do not use `rustup`. This pull request just
fixes it by not panicking on the call to `rustup`.

Bumps the known_good_semver group with 1 update:
[syn](https://github.com/dtolnay/syn).

Updates `syn` from 2.0.38 to 2.0.39
<details>
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<h2>2.0.39</h2>
<ul>
<li>Fix parsing of return expression in match guards (<a
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<li>Improve error message on labeled loop as value expression for break
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<li><a
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Release 2.0.39</li>
<li><a
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Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1531">#1531</a>
from dtolnay/breaklabel</li>
<li><a
href="https://github.com/dtolnay/syn/commit/b88f86fae5c1ac284179181bf7a34549e6d96d7c"><code>b88f86f</code></a>
Ignore single_element_loop clippy lint in test</li>
<li><a
href="https://github.com/dtolnay/syn/commit/a876185366557cb0e0e175c3be48721c8cc0d8e6"><code>a876185</code></a>
Improve error on break followed by labeled loop</li>
<li><a
href="https://github.com/dtolnay/syn/commit/32ab9794d6b75248c1946ae18baab12a46137eb0"><code>32ab979</code></a>
Add test of ambiguous label parsing in break</li>
<li><a
href="https://github.com/dtolnay/syn/commit/6f658f88a213e25b7ac7ec2dc77c537de679b745"><code>6f658f8</code></a>
Merge pull request <a
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from dtolnay/canbeginexpr</li>
<li><a
href="https://github.com/dtolnay/syn/commit/20497e1a555812cfe05769b4d8c117c4e0e4edbd"><code>20497e1</code></a>
More precise decision to parse expression after return keyword</li>
<li><a
href="https://github.com/dtolnay/syn/commit/c6a651aa12447d50c22db3189ef38cff90fc267b"><code>c6a651a</code></a>
Update name of ExprReturn parse function to match variant name</li>
<li><a
href="https://github.com/dtolnay/syn/commit/c2745901009f7d65e7b708cd80031642038f765e"><code>c274590</code></a>
Indicate that peek argument refers to syn::Ident</li>
<li><a
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Merge pull request <a
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`wasm-instrument` and `rand` are optional and only used in benchmarking,
so should not be pulled in by default as part of the `std` feature.

Using taplo, fixes all our broken and inconsistent toml formatting and
adds CI to keep them tidy.

If people want we can customise the format rules as described here
https://taplo.tamasfe.dev/configuration/formatter-options.html

@ggwpez

, I suggest zepter is used only for checking features are
propagated, and leave formatting for taplo to avoid duplicate work and
conflicts.

TODO
- [x] Use `exclude = [...]` syntax in taplo file to ignore zombienet
tests instead of deleting the dir

---------

Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>

see #2189

This PR does the following:
- Bring the user api functions into a new pallet-contracts-uapi (They
are currently defined in ink!
[here])(https://github.com/paritytech/ink/blob/master/crates/env/src/engine/on_chain/ext.rs)
- Add older api versions and unstable to the user api trait.
- Remove pallet-contracts-primitives and bring the types it defined in
uapi / pallet-contracts
- Add the infrastructure to build fixtures from Rust files and test it
works by replacing `dummy.wat` and `call.wat`
- Move all the doc from wasm/runtime.rs to pallet-contracts-uapi.

This will be done in a follow up:
- convert the rest of the test from .wat to rust
- bring risc-v uapi up to date with wasm
- finalize the uapi host fns, making sure everything is codegen from the
source host fns in pallet-contracts

---------

Co-authored-by: Alexander Theißen <[email protected]>

This commit introduces a new concept called `NotificationService` which
allows Polkadot protocols to communicate with the underlying
notification protocol implementation directly, without routing events
through `NetworkWorker`. This implies that each protocol has its own
service which it uses to communicate with remote peers and that each
`NotificationService` is unique with respect to the underlying
notification protocol, meaning `NotificationService` for the transaction
protocol can only be used to send and receive transaction-related
notifications.

The `NotificationService` concept introduces two additional benefits:
  * allow protocols to start using custom handshakes
  * allow protocols to accept/reject inbound peers

Previously the validation of inbound connections was solely the
responsibility of `ProtocolController`. This caused issues with light
peers and `SyncingEngine` as `ProtocolController` would accept more
peers than `SyncingEngine` could accept which caused peers to have
differing views of their own states. `SyncingEngine` would reject excess
peers but these rejections were not properly communicated to those peers
causing them to assume that they were accepted.

With `NotificationService`, the local handshake is not sent to remote
peer if peer is rejected which allows it to detect that it was rejected.

This commit also deprecates the use of `NetworkEventStream` for all
notification-related events and going forward only DHT events are
provided through `NetworkEventStream`. If protocols wish to follow each
other's events, they must introduce additional abtractions, as is done
for GRANDPA and transactions protocols by following the syncing protocol
through `SyncEventStream`.

Fixes https://github.com/paritytech/polkadot-sdk/issues/512
Fixes https://github.com/paritytech/polkadot-sdk/issues/514
Fixes https://github.com/paritytech/polkadot-sdk/issues/515
Fixes https://github.com/paritytech/polkadot-sdk/issues/554
Fixes https://github.com/paritytech/polkadot-sdk/issues/556

---
These changes are transferred from
https://github.com/paritytech/substrate/pull/14197 but there are no
functional changes compared to that PR

---------

Co-authored-by: Dmitry Markin <[email protected]>
Co-authored-by: Alexandru Vasile <[email protected]>

Step in https://github.com/paritytech/polkadot-sdk/issues/171

This PR adds `derive_impl` on all `frame_system` config impls for mock
runtimes. The overridden configs are maintained as of now to ensure
minimal changes.

---------

Co-authored-by: Oliver Tale-Yazdi <[email protected]>

This moves the macro related re-exports to `__private` to make it more
obvious for downstream users that they are using an internal api.

---------

Co-authored-by: command-bot <>

This PR introduces:
- XCM  host functions `xcm_send`, `xcm_execute`
- An Xcm trait into the config. that proxy these functions to to
`pallet_xcm`, or disable their usage by using `()`.
- A mock_network and xcm_test files to test the newly added xcm-related
functions.

---------

Co-authored-by: Keith Yeung <[email protected]>
Co-authored-by: Sasha Gryaznov <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: Francisco Aguirre <[email protected]>
Co-authored-by: Alexander Theißen <[email protected]>

Small PR that introduce a new crate that will host RISC-V & wasm
fixtures for testing pallet-contracts

# Description
We derive few useful traits on `ErrorOrigin` and `ExecError`, including
`codec::Encode` and `codec::Decode`, so that `ExecResult` is
en/decodable as well. This is required for a contract mocking feature
(already prepared in drink:
https://github.com/Cardinal-Cryptography/drink/pull/61). In more detail:
`ExecResult` must be passed from runtime extension, through runtime
interface, back to the pallet, which requires that it is serializable to
bytes in some form (or implements some rare, auxiliary traits).

**Impact on runtime size**: Since most of these traits is used directly
in the pallet now, compiler should be able to throw it out (and thus we
bring no new overhead). However, they are very useful in secondary tools
like drink or other testing libraries.

# Checklist

- [x] My PR includes a detailed description as outlined in the
"Description" section above
- [ ] My PR follows the [labeling requirements](CONTRIBUTING.md#Process)
of this project (at minimum one label for `T`
  required)
- [x] I have made corresponding changes to the documentation (if
applicable)
- [x] I have added tests that prove my fix is effective or that my
feature works (if applicable)

Restore fix from #2077

Runtime migration CI is currently failing
(https://gitlab.parity.io/parity/mirrors/polkadot-sdk/builds/4122083)
for the contracts testnet due to unnecessary panicing in a `pre_upgrade`
hook.

Soon idempotency will be enforced
https://github.com/paritytech/try-runtime-cli/issues/42, in the mean
time we need to manually fix these issues as they arise.

---

also removes backticks from the string in `echo`, which caused a
'command not found' error in ci output

Project that includes pallet-contracts via crates.io will fail to run 
```bash
cargo check --features=runtime-benchmarks
```

without the currently not included benchmarks files

closes https://github.com/paritytech/polkadot-sdk/issues/1882

## Breaking Changes

This PR introduces a new item to `pallet_balances::Config`:

```diff
trait Config {
++    type RuntimeFreezeReasons;
}
```

This value is only used to check it against `type MaxFreeze`. A similar
check has been added for `MaxHolds` against `RuntimeHoldReasons`, which
is already given to `pallet_balances`.

In all contexts, you should pass the real `RuntimeFreezeReasons`
generated by `construct_runtime` to `type RuntimeFreezeReasons`. Passing
`()` would also work, but it would imply that the runtime uses no
freezes at all.

---------

Signed-off-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Oliver Tale-Yazdi <[email protected]>

The `xcm` crate was renamed to `staging-xcm` to be able to publish it to
crates.io as someone as squatted `xcm`. The problem with this rename is
that the `TypeInfo` includes the crate name which ultimately lands in
the metadata. The metadata is consumed by downstream users like
`polkadot-js` or people building on top of `polkadot-js`. These people
are using the entire `path` to find the type in the type registry. Thus,
their code would break as the type path would now be [`staging_xcm`,
`VersionedXcm`] instead of [`xcm`, `VersionedXcm`]. This pull request
fixes this by renaming the path segment `staging_xcm` to `xcm`.

This requires: https://github.com/paritytech/scale-info/pull/197

---------

Co-authored-by: Francisco Aguirre <[email protected]>

Co-authored-by: command-bot <>

Bumps the known_good_semver group with 1 update:
[syn](https://github.com/dtolnay/syn).

<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.38</h2>
<ul>
<li>Fix <em>&quot;method 'peek' has an incompatible type for
trait&quot;</em> error when defining <code>bool</code> as a custom
keyword (<a
href="https://redirect.github.com/dtolnay/syn/issues/1518">#1518</a>,
thanks <a
href="https://github.com/Vanille-N"><code>@​Vanille-N</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/43632bfb6c78ee1f952645a268ab1ac4af162977"><code>43632bf</code></a>
Release 2.0.38</li>
<li><a
href="https://github.com/dtolnay/syn/commit/abd2c214b44da64a5e420d72919308300eebc23d"><code>abd2c21</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1518">#1518</a>
from Vanille-N/master</li>
<li><a
href="https://github.com/dtolnay/syn/commit/6701e6077e15013ef34b15e3ffdae2657e499d83"><code>6701e60</code></a>
Absolute path to <code>bool</code> in
<code>custom_punctuation.rs</code></li>
<li><a
href="https://github.com/dtolnay/syn/commit/7313d242398111423f046386aa0a75548f63d236"><code>7313d24</code></a>
Resolve single_match_else pedantic clippy lint in code generator</li>
<li><a
href="https://github.com/dtolnay/syn/commit/67ab64f3c09e17b23493c7cda498e7edb8830f21"><code>67ab64f</code></a>
Include unexpected token in the test failure message</li>
<li><a
href="https://github.com/dtolnay/syn/commit/137ae33486de3f2652487f8f64436ad1429df496"><code>137ae33</code></a>
Check no remaining token after the first literal</li>
<li><a
href="https://github.com/dtolnay/syn/commit/258e9e8a11d188c1ee1ffb2b069819239999f9ac"><code>258e9e8</code></a>
Ignore single_match_else pedantic clippy lint in test</li>
<li><a
href="https://github.com/dtolnay/syn/commit/92fd50ee8cb52968d9c66fbe6d67638c1f838e26"><code>92fd50e</code></a>
Test docs.rs documentation build in CI</li>
<li>See full diff in <a
href="https://github.com/dtolnay/syn/compare/2.0.37...2.0.38">compare
view</a></li>
</ul>
</details>
<br />


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# Description
This PR introduces two changes:
- the previous `Tracing` trait has been modified to accept contract
address instead of code hash (seems to be way more convenient)
- a new trait `CallInterceptor` that allows intercepting contract calls;
in particular the default implementation for `()` will just proceed in a
standard way (after compilation optimizations, there will be no
footprint of that); however, implementing type might decide to mock
invocation and return `ExecResult` instead

Note: one might try merging `before_call` and `intercept_call`. However,
IMHO this would be bad, since it would mix two completely different
abstractions - tracing without any effects and actual intervention into
execution process.

This will unblock working on mocking contracts utility in drink and
similar tools (https://github.com/Cardinal-Cryptography/drink/issues/33)

# Checklist

- [x] My PR includes a detailed description as outlined in the
"Description" section above
- [ ] My PR follows the [labeling
requirements](https://github.com/paritytech/polkadot-sdk/blob/master/docs/CONTRIBUTING.md#process)
of this project (at minimum one label for `T` required)
- [x] I have made corresponding changes to the documentation (if
applicable)
- [x] I have added tests that prove my fix is effective or that my
feature works (if applicable)