**Update:** Pushed additional changes based on the review comments.

**This pull request fixes various spelling mistakes in this
repository.**

Most of the changes are contained in the first **3** commits:

- `Fix spelling mistakes in comments and docs`

- `Fix spelling mistakes in test names`

- `Fix spelling mistakes in error messages, panic messages, logs and
tracing`

Other source code spelling mistakes are separated into individual
commits for easier reviewing:

- `Fix the spelling of 'authority'`

- `Fix the spelling of 'REASONABLE_HEADERS_IN_JUSTIFICATION_ANCESTRY'`

- `Fix the spelling of 'prev_enqueud_messages'`

- `Fix the spelling of 'endpoint'`

- `Fix the spelling of 'children'`

- `Fix the spelling of 'PenpalSiblingSovereignAccount'`

- `Fix the spelling of 'PenpalSudoAccount'`

- `Fix the spelling of 'insufficient'`

- `Fix the spelling of 'PalletXcmExtrinsicsBenchmark'`

- `Fix the spelling of 'subtracted'`

- `Fix the spelling of 'CandidatePendingAvailability'`

- `Fix the spelling of 'exclusive'`

- `Fix the spelling of 'until'`

- `Fix the spelling of 'discriminator'`

- `Fix the spelling of 'nonexistent'`

- `Fix the spelling of 'subsystem'`

- `Fix the spelling of 'indices'`

- `Fix the spelling of 'committed'`

- `Fix the spelling of 'topology'`

- `Fix the spelling of 'response'`

- `Fix the spelling of 'beneficiary'`

- `Fix the spelling of 'formatted'`

- `Fix the spelling of 'UNKNOWN_PROOF_REQUEST'`

- `Fix the spelling of 'succeeded'`

- `Fix the spelling of 'reopened'`

- `Fix the spelling of 'proposer'`

- `Fix the spelling of 'InstantiationNonce'`

- `Fix the spelling of 'depositor'`

- `Fix the spelling of 'expiration'`

- `Fix the spelling of 'phantom'`

- `Fix the spelling of 'AggregatedKeyValue'`

- `Fix the spelling of 'randomness'`

- `Fix the spelling of 'defendant'`

- `Fix the spelling of 'AquaticMammal'`

- `Fix the spelling of 'transactions'`

- `Fix the spelling of 'PassingTracingSubscriber'`

- `Fix the spelling of 'TxSignaturePayload'`

- `Fix the spelling of 'versioning'`

- `Fix the spelling of 'descendant'`

- `Fix the spelling of 'overridden'`

- `Fix the spelling of 'network'`

Let me know if this structure is adequate.

**Note:** The usage of the words `Merkle`, `Merkelize`, `Merklization`,
`Merkelization`, `Merkleization`, is somewhat inconsistent but I left it
as it is.

~~**Note:** In some places the term `Receival` is used to refer to
message reception, IMO `Reception` is the correct word here, but I left
it as it is.~~

~~**Note:** In some places the term `Overlayed` is used instead of the
more acceptable version `Overlaid` but I also left it as it is.~~

~~**Note:** In some places the term `Applyable` is used instead of the
correct version `Applicable` but I also left it as it is.~~

**Note:** Some usage of British vs American english e.g. `judgement` vs
`judgment`, `initialise` vs `initialize`, `optimise` vs `optimize` etc.
are both present in different places, but I suppose that's
understandable given the number of contributors.

~~**Note:** There is a spelling mistake in `.github/CODEOWNERS` but it
triggers errors in CI when I make changes to it, so I left it as it
is.~~

Updating the bridges subtree hopefully just one last time in this
formula in order to make the final migration less verbose.

Fixes formatting for
https://github.com/paritytech/polkadot-sdk/pull/3698

Adds availability-write regression tests.
The results for the `availability-distribution` subsystem are volatile,
so I had to reduce the precision of the test.

Another simple refactory to prune some duplicate code

Follow up of: https://github.com/paritytech/polkadot-sdk/pull/3684

Devs seem to not realize that this should be filled out manually. The
default is also often wrong.

https://github.com/paritytech/polkadot-sdk/issues/3742

Related to
https://github.com/paritytech/parity-bridges-common/issues/2538

This PR doesn't contain any functional changes. 

The PR moves specific bridged chain definitions from
`bridges/primitives` to `bridges/chains` folder in order to facilitate
the migration of the `parity-bridges-repo` into `polkadot-sdk` as
discussed in https://hackmd.io/LprWjZ0bQXKpFeveYHIRXw?view

Apart from this it also includes some cosmetic changes to some
`Cargo.toml` files as a result of running `diener workspacify`.

cc https://github.com/paritytech/ci_cd/issues/943

Fixes https://github.com/paritytech/polkadot-sdk/issues/3762 .

---------

Co-authored-by: eskimor <[email protected]>
Co-authored-by: Adrian Catangiu <[email protected]>

Currently `transfer_assets` from pallet-xcm covers 4 main different
transfer types:
- `localReserve`
- `DestinationReserve`
- `Teleport`
- `RemoteReserve`

For the first three, the local execution and the remote message sending
are separated, and fees are deducted in pallet-xcm itself:
https://github.com/paritytech/polkadot-sdk/blob/3410dfb3

/polkadot/xcm/pallet-xcm/src/lib.rs#L1758.

For the 4th case `RemoteReserve`, pallet-xcm is still relying on the
xcm-executor itself to send the message (through the
`initiateReserveWithdraw` instruction). In this case, if delivery fees
need to be charged, it is not possible to do so because the
`jit_withdraw` mode has not being set.

This PR proposes to still use the `initiateReserveWithdraw` but
prepending a `setFeesMode { jit_withdraw: true }` to make sure delivery
fees can be paid.

A test-case is also added to present the aforementioned case

---------

Co-authored-by: Adrian Catangiu <[email protected]>

We do not need to make these traits generic over QueryId type, we can
just use the QueryId alias everywhere

Make sure explicitly set by the operator public addresses go first in
the authority discovery DHT records.

Also update `Discovery` behavior to eliminate duplicates in the returned
addresses.

This PR should improve situation with
https://github.com/paritytech/polkadot-sdk/issues/3519.

Obsoletes https://github.com/paritytech/polkadot-sdk/pull/3657.

Bridging fees are calculated using a static ETH/DOT exchange rate that
can deviate significantly from the real-world exchange rate. We
therefore need to add a safety margin to the fee so that users almost
aways cover the cost of relaying.

# FAQ

> Why introduce a `multiplier` parameter instead of configuring an
exchange rate which already has a safety factor applied?

When converting from ETH to DOT, we need to _divide_ the multiplier by
the exchange rate, and to convert from DOT to ETH we need to _multiply_
the multiplier by the exchange rate.

> Other input parameters to the fee calculation can also deviate from
real-world values. These include substrate weights, gas prices, and so
on. Why does the multiplier introduced here not adjust those?

A single scalar multiplier won't be able to accommodate the different
volatilities efficiently. For example, gas prices are much more volatile
than exchange rates, and substrate weights hardly ever change.

So the pricing config relating to weights and gas prices should already
have some appropriate safety margin pre-applied.

# Detailed Changes:

* Added `multiplier` field to `PricingParameters`
* Outbound-queue fee is multiplied by `multiplier`
* This `multiplier` is synced to the Ethereum side
* Improved Runtime API for calculating outbound-queue fees. This API
makes it much easier to for configure parts of the system in preparation
for launch.
* Improve and clarify code documentation

Upstreamed from https://github.com/Snowfork/polkadot-sdk/pull/127

---------

Co-authored-by: Clara van Staden <[email protected]>
Co-authored-by: Adrian Catangiu <[email protected]>

## Bug Explanation
Adds a check that prevents finalized headers with a gap larger than the
sync committee period being imported, which could cause execution
headers in the gap being unprovable. The current version of the Ethereum
client checks that there is a header at least every sync committee, but
it doesn't check that the headers are within a sync period of each
other. For example:

Header 100 (sync committee period 1)
Header 9000 (sync committee period 2)
(8900 blocks apart)

These headers are in adjacent sync committees, but more than the sync
committee period (8192 blocks) apart.

The reason we need a header every 8192 slots at least, is the header is
used to prove messages within the last 8192 blocks. If we import header
9000, and we receive a message to be verified at header 200, the
`block_roots` field of header 9000 won't contain the header in order to
do the ancestry check.

## Environment
While running in Rococo, this edge case was discovered after the relayer
was offline for a few days. It is unlikely, but not impossible, to
happen again and so it should be backported to polkadot-sdk 1.7.0 (so
that
[polkadot-fellows/runtimes](https://github.com/polkadot-fellows/runtimes)
can be updated with the fix).

Our Ethereum client has been operational on Rococo for the past few
months, and this been the only major issue discovered so far.

### Unrelated Change
An unrelated nit: Removes a left over file that should have been deleted
when the `parachain` directory was removed.

---------

Co-authored-by: claravanstaden <Cats 4 life!>

Good day,

I'm seeking to add the following bootnodes for Kusama and Polkadot's
relay and system chains. The following commands can be used to test
connectivity. All node keys are backed up.

Polkadot:
```
polkadot --chain polkadot --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-polkadot.luckyfriday.io/tcp/443/wss/p2p/12D3KooWAdyiVAaeGdtBt6vn5zVetwA4z4qfm9Fi2QCSykN1wTBJ" --no-hardware-benchmarks
```


Assethub-Polkadot:

```
polkadot-parachain --chain asset-hub-polkadot --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-polkadot-assethub.luckyfriday.io/tcp/443/wss/p2p/12D3KooWDR9M7CjV1xdjCRbRwkFn1E7sjMaL4oYxGyDWxuLrFc2J" --no-hardware-benchmarks

```

Bridgehub-Polkadot:

```
polkadot-parachain --chain bridge-hub-polkadot --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-polkadot-bridgehub.luckyfriday.io/tcp/443/wss/p2p/12D3KooWKf3mBXHjLbwtPqv1BdbQuwbFNcQQYxASS7iQ25264AXH" --no-hardware-benchmarks

```
Collectives-Polkadot

```
polkadot-parachain --chain collectives-polkadot --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-polkadot-collectives.luckyfriday.io/tcp/443/wss/p2p/12D3KooWCzifnPooTt4kvTnXT7FTKTymVL7xn7DURQLsS2AKpf6w" --no-hardware-benchmarks

```
Kusama:

```
polkadot --chain kusama --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-kusama.luckyfriday.io/tcp/443/wss/p2p/12D3KooWS1Lu6DmK8YHSvkErpxpcXmk14vG6y4KVEFEkd9g62PP8" --no-hardware-benchmarks

```
Assethub-Kusama:

```
polkadot-parachain --chain asset-hub-kusama --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-kusama-assethub.luckyfriday.io/tcp/443/wss/p2p/12D3KooWSwaeFs6FNgpgh54fdoxSDAA4nJNaPE3PAcse2GRrG7b3" --no-hardware-benchmarks
```

Bridgehub-Kusama:

```
polkadot-parachain --chain bridge-hub-kusama --base-path /tmp/node --name "Boot" --reserved-only --reserved-nodes "/dns/boot-kusama-bridgehub.luckyfriday.io/tcp/443/wss/p2p/12D3KooWQybw6AFmAvrFfwUQnNxUpS12RovapD6oorh2mAJr4xyd" --no-hardware-benchmarks
```

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

Based on issue
[#2512](https://github.com/paritytech/polkadot-sdk/issues/2512), it
seems that some ecosystem teams are using these networks to set up their
staging environments and test certain use cases, some of them involving
sending XCMs from the relay with origins not allowed in the current
configuration.

This change reverts the configuration of `SendXcmOrigin`.

---------

Co-authored-by: Adrian Catangiu <[email protected]>

Make taplo happy

There was a typo, so now, there's no more typo.

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

Small refactoring to reduce the algorithmic complexity of the initial
message distribution in approval voting after a sync from O(n_candidates
^ 2) to O(n_candidates).

Changes needed to implement the runtime part of elastic scaling:
https://github.com/paritytech/polkadot-sdk/issues/3131,
https://github.com/paritytech/polkadot-sdk/issues/3132,
https://github.com/paritytech/polkadot-sdk/issues/3202

Also fixes https://github.com/paritytech/polkadot-sdk/issues/3675

TODOs:

- [x] storage migration
- [x] optimise process_candidates from O(N^2)
- [x] drop backable candidates which form cycles
- [x] fix unit tests
- [x] add more unit tests
- [x] check the runtime APIs which use the pending availability storage.
We need to expose all of them, see
https://github.com/paritytech/polkadot-sdk/issues/3576
- [x] optimise the candidate selection. we're currently picking randomly
until we satisfy the weight limit. we need to be smart about not
breaking candidate chains while being fair to all paras -
https://github.com/paritytech/polkadot-sdk/pull/3573

Relies on the changes made in
https://github.com/paritytech/polkadot-sdk/pull/3233 in terms of the
inclusion policy and the candidate ordering

---------

Signed-off-by: alindima <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: eskimor <[email protected]>

This PR backports small reformatting of the release notes templates.

This PR backports:
- node version bump
- `spec_vesion` bump
- reordering of the `prdocs` to the appropriate folder
from the `1.9.0` release branch

Step in https://github.com/paritytech/polkadot-sdk/issues/3688

This PR proposes enabling PoV reclaim on the `rococo-parachain`
testchain to streamline testing and development of high-TPS stuff.

We witnessed really poor performance on Rococo, where we ended up with
50 on-demand cores. This was due to the fact that for each core the full
queue was processed. With this change full queue processing will happen
way less often (most of the time complexity is O(1) or O(log(n))) and if
it happens then only for one core (in expectation).

Also spot price is now updated before each order to ensure economic back
pressure.


TODO:

- [x] Implement
- [x] Basic tests
- [x] Add more tests (see todos)
- [x] Run benchmark to confirm better performance, first results suggest
> 100x faster.
- [x] Write migrations
- [x] Bump scale-info version and remove patch in Cargo.toml
- [x] Write PR docs: on-demand performance improved, more on-demand
cores are now non problematic anymore. If need by also the max queue
size can be increased again. (Maybe not to 10k)

Optional: Performance can be improved even more, if we called
`pop_assignment_for_core()`, before calling `report_processed` (Avoid
needless affinity drops). The effect gets smaller the larger the claim
queue and I would only go for it, if it does not add complexity to the
scheduler.

---------

Co-authored-by: eskimor <[email protected]>
Co-authored-by: antonva <[email protected]>
Co-authored-by: command-bot <>
Co-authored-by: Anton Vilhelm Ásgeirsson <[email protected]>
Co-authored-by: ordian <[email protected]>

_This PR is being continued from
https://github.com/paritytech/polkadot-sdk/pull/2206, which was closed
when the developer_hub was merged._
closes https://github.com/paritytech/polkadot-sdk-docs/issues/44

---
# Description

This PR adds a reference document to the `developer-hub` crate (see
https://github.com/paritytech/polkadot-sdk/pull/2102). This specific
reference document covers defensive programming practices common within
the context of developing a runtime with Substrate.

In particular, this covers the following areas: 

- Default behavior of how Rust deals with numbers in general
- How to deal with floating point numbers in runtime / fixed point
arithmetic
- How to deal with Integer overflows
- General "safe math" / defensive programming practices for common
pallet development scenarios
- Defensive traits that exist within Substrate, i.e.,
`defensive_saturating_add `, `defensive_unwrap_or`
- More general defensive programming examples (keep it concise)
- Link to relevant examples where these practices are actually in
production / being used
- Unwrapping (or rather lack thereof) 101

todo
-- 
- [x] Apply feedback from previous PR
- [x] This may warrant a PR to append some of these docs to
`sp_arithmetic`

---------

Co-authored-by: Oliver Tale-Yazdi <[email protected]>
Co-authored-by: Gonçalo Pestana <[email protected]>
Co-authored-by: Kian Paimani <[email protected]>
Co-authored-by: Francisco Aguirre <[email protected]>
Co-authored-by: Radha <[email protected]>

Bumps [anyhow](https://github.com/dtolnay/anyhow) from 1.0.75 to 1.0.81.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/anyhow/releases">anyhow's
releases</a>.</em></p>
<blockquote>
<h2>1.0.81</h2>
<ul>
<li>Make backtrace support available when using -Dwarnings (<a
href="https://redirect.github.com/dtolnay/anyhow/issues/354">#354</a>)</li>
</ul>
<h2>1.0.80</h2>
<ul>
<li>Fix unused_imports warnings when compiled by rustc 1.78</li>
</ul>
<h2>1.0.79</h2>
<ul>
<li>Work around improperly cached build script result by sccache (<a
href="https://redirect.github.com/dtolnay/anyhow/issues/340">#340</a>)</li>
</ul>
<h2>1.0.78</h2>
<ul>
<li>Reduce spurious rebuilds under RustRover IDE when using a nightly
toolchain (<a
href="https://redirect.github.com/dtolnay/anyhow/issues/337">#337</a>)</li>
</ul>
<h2>1.0.77</h2>
<ul>
<li>Make <code>anyhow::Error::backtrace</code> available on stable Rust
compilers 1.65+ (<a
href="https://redirect.github.com/dtolnay/anyhow/issues/293">#293</a>,
thanks <a
href="https://github.com/LukasKalbertodt"><code>@​LukasKalbertodt</code></a>)</li>
</ul>
<h2>1.0.76</h2>
<ul>
<li>Opt in to <code>unsafe_op_in_unsafe_fn</code> lint (<a
href="https://redirect.github.com/dtolnay/anyhow/issues/329">#329</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/anyhow/commit/4aad4edebd9f09247d6c6b6784419a74bb116829"><code>4aad4ed</code></a>
Release 1.0.81</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/8be90917c603199c5d1fdd73984237f023768e22"><code>8be9091</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/anyhow/issues/354">#354</a>
from dtolnay/deadcode</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/a2eb7dd5e13add83f254b6dac0f68e043effc521"><code>a2eb7dd</code></a>
Make compatible with -Dwarnings</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/54437197ee79c20678db433d98616fab7ddff1a5"><code>5443719</code></a>
Release 1.0.80</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/dfc7bc07d4c41b61093c3251ed82becb51810bd4"><code>dfc7bc0c

</code></a>
Work around prelude redundant import warnings</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/6e4f86b48b5182ec71dbc8e308db9dc91e2ec8a5"><code>6e4f86b</code></a>
Import from alloc not std, where possible</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/f885a133ede579c45e90ab489455126403d05db1"><code>f885a13</code></a>
Ignore incompatible_msrv clippy false positives in test</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/fefbcbcb0b336a2d6c2ce6f0ee6d3fd02ef2cd3b"><code>fefbcbc</code></a>
Ignore incompatible_msrv clippy lint</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/78f2d81cc71b79050a2fda270c45ff267557d853"><code>78f2d81</code></a>
Update ui test suite to nightly-2024-02-08</li>
<li><a
href="https://github.com/dtolnay/anyhow/commit/edd88d3a43f11f1931330d3dd54189353ef00203"><code>edd88d3</code></a>
Update ui test suite to nightly-2024-01-31</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/anyhow/compare/1.0.75...1.0.81">compare
view</a></li>
</ul>
</details>
<br />


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</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

The PR adds two things:
1. Runtime API exposing the whole claim queue
2. Consumes the API in `collation-generation` to fetch the next
scheduled `ParaEntry` for an occupied core.

Related to https://github.com/paritytech/polkadot-sdk/issues/1797

Co-authored-by: command-bot <>

Bump zombienet version, this version have the latest version of
`@polkadot/api` module and fix the failures in CI (e.g
https://gitlab.parity.io/parity/mirrors/polkadot-sdk/-/jobs/5570106).

Thanks!

Introduces `CryptoBytes` type defined as:

```rust
pub struct CryptoBytes<const N: usize, Tag = ()>(pub [u8; N], PhantomData<fn() -> Tag>);
```

The type implements a bunch of methods and traits which are typically
expected from a byte array newtype
(NOTE: some of the methods and trait implementations IMO are a bit
redundant, but I decided to maintain them all to not change too much
stuff in this PR)

It also introduces two (generic) typical consumers of `CryptoBytes`:
`PublicBytes` and `SignatureBytes`.

```rust
pub struct PublicTag;
pub PublicBytes<const N: usize, CryptoTag> = CryptoBytes<N, (PublicTag, CryptoTag)>;

pub struct SignatureTag;
pub SignatureBytes<const N: usize, CryptoTag> = CryptoBytes<N, (SignatureTag, CryptoTag)>;
```

Both of them use a tag to differentiate the two types at a higher level.
Downstream specializations will further specialize using a dedicated
crypto tag. For example in ECDSA:


```rust
pub struct EcdsaTag;

pub type Public = PublicBytes<PUBLIC_KEY_SERIALIZED_SIZE, EcdsaTag>;
pub type Signature = PublicBytes<PUBLIC_KEY_SERIALIZED_SIZE, EcdsaTag>;
```

Overall we have a cleaner and most importantly **consistent** code for
all the types involved

All these details are opaque to the end user which can use `Public` and
`Signature` for the cryptos as before

On top of #3302.

We want the validators to upgrade first before we add changes to the
collation side to send the new variants, which is why this part is
extracted into a separate PR.

The detection of when to send the parent head is based on the core
assignments at the relay parent of the candidate. We probably want to
make it more flexible in the future, but for now, it will work for a
simple use case when a para always has multiple cores assigned to it.

---------

Signed-off-by: Matteo Muraca <[email protected]>
Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: Matteo Muraca <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Juan Ignacio Rios <[email protected]>
Co-authored-by: Branislav Kontur <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>

This PR enables the `transaction_unstable_broadcast ` and
`transaction_unstable_stop` RPC API.

Since the API is unstable, we don't need to expose this in the release
notes.

After merging this, we could validate the API in subxt and stabilize it.

Spec PR that stabilizes the API:
https://github.com/paritytech/json-rpc-interface-spec/pull/139

cc @paritytech/subxt-team

Signed-off-by: Alexandru Vasile <[email protected]>

Part of #3326 

cc @Kianenigma @ggwpez @liamaharon

 

polkadot address: 12poSUQPtcF1HUPQGY3zZu2P8emuW9YnsPduA4XG3oCEfJVp

---------

Signed-off-by: Matteo Muraca <[email protected]>

Changes:
- Port the `pov_mode` attribute from the V1 syntax to V2
- Update `pallet-whitelist` and `frame-benchmarking-pallet-pov`

Follow up: also allow this attribute on top-level benchmark modules.

---------

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

Closes: https://github.com/paritytech/polkadot-sdk/issues/3704

Currently the xcm-executor returns an `Unimplemented` error if it
receives any HRMP-related instruction.
What I propose here, which is what we are currently doing in our forked
executor at polimec, is to introduce a trait implemented by the executor
which will handle those instructions.

This way, if parachains want to keep the default behavior, they just use
`()` and it will return unimplemented, but they can also implement their
own logic to establish HRMP channels with other chains in an automated
fashion, without requiring to go through governance.

Our implementation is mentioned in the [polkadot HRMP
docs](https://arc.net/l/quote/hduiivbu), and it was suggested to us to
submit a PR to add these changes to polkadot-sdk.

---------

Co-authored-by: Branislav Kontur <[email protected]>
Co-authored-by: command-bot <>