Asset Hub Next has been deployed on Westend as parachain 1100, but it's
not yet a trusted teleporter.
This minimal PR adds it in stable2412 so that it can be deployed right
away without waiting for the rest of the release to be finalised and
deployed.

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

This PR enhances **`test_log_capture`**, ensuring logs are **captured
for assertions** and **printed to the console** during test execution.

## **Motivation**  

- Partially addresses #6119 and #6125, to improves developer **tracing
and debugging** in XCM-related tests.
- Builds on #7594, improving **log visibility** while maintaining test
**log capture capabilities**.
- While writing tests for #7234, I noticed this function was missing.
This PR adds it to streamline log handling in unit tests.

## **Changes**  

- Ensures logs up to `TRACE` level are **captured** (for assertions) and
**printed** (for visibility).
- Refines documentation to clearly specify **when to use** each
function.
- **Removes ANSI escape codes** from captured logs to ensure clean,
readable assertions.

## **When to Use?**  

| Usage | Captures Logs? | Prints Logs? | Example |

|----------------------------------------------|-----------------|--------------|-----------------------------------------------|
| `init_log_capture(LevelFilter::INFO, false)` |  Yes |  No | Capture
logs for assertions without printing. |
| `init_log_capture(LevelFilter::TRACE, true)` |  Yes |  Yes | Capture
logs and print them in test output. |
| `sp_tracing::init_for_tests()` |  No | 

 Yes | Print logs to the
console without capturing. |

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Fixes https://github.com/paritytech/polkadot-sdk/issues/7664

The discussion in https://github.com/paritytech/polkadot-sdk/pull/7710
should provide the context for why this solution was picked.

---------

Signed-off-by: Andrei Sandu <andrei-mihail@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

I added a new `ExternalConsensusLocationsConverterFor` struct to handle
external global consensus locations and their child locations.
This struct extends the functionality of existing converters
(`GlobalConsensusParachainConvertsFor` and
`EthereumLocationsConverterFor`) while maintaining backward
compatibility.

Fixes https://github.com/paritytech/polkadot-sdk/issues/7129

Polkadot address: 121HJWZtD13GJQPD82oEj3gSeHqsRYm1mFgRALu4L96kfPD1

---------

Co-authored-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: ndk <ndk@parity.io>

Allow adding extra request-response protocols during polkadot service
initialization. This is required to add a request-response protocol
described in
[RFC-0008](https://polkadot-fellows.github.io/RFCs/approved/0008-parachain-bootnodes-dht.html)
to the relay chain side of the parachain node.

### Review notes
The PR might look scary due to a lot of code being moved. It is easier
to review it on a per-commit basis. The commits do not containing
changes to the code logic are named accordingly.

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

- Refactor to use the `frame` crate.
- Use procedural macro version `construct_runtime` in mock.
- Expose `PalletId` to `frame::pallet_prelude`.
- Part of #6202.

---

Polkadot address: 156HGo9setPcU2qhFMVWLkcmtCEGySLwNqa3DaEiYSWtte4Y

---------

Signed-off-by: Xavier Lau <x@acg.box>
Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

# Description
Migrating polkadot-runtime-parachains configuration benchmarking to the
new benchmarking syntax v2.
This is a part of #6202

---------

Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: seemantaggarwal <32275622+seemantaggarwal@users.noreply.github.com>

Related to https://github.com/paritytech/polkadot-sdk/issues/7360

This PR adds `DecodeWithMemTracking` as a trait bound for `Header`,
`Block` and `TransactionExtension` and
derives it for all the types that implement these traits in
`polkadot-sdk`.

A follow-up PR to simplify event assertions by introducing
`contains_event`, allowing event checks without needing exact field
matches. This reduces redundancy and makes tests more flexible.

Partially addresses #6119 by providing an alternative way to assert
events.

Reference: [PR #7594 -
Discussion](https://github.com/paritytech/polkadot-sdk/pull/7594#discussion_r1965566349)

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: Bastian Köcher <git@kchr.de>

# Description

* This PR adds a new extrinsic `poke_deposit` to `pallet-multisig`. This
extrinsic will be used to re-adjust the deposits made in the pallet to
create a multisig operation after AHM.
* Part of #5591 

## Review Notes

* Added a new extrinsic `poke_deposit` in `pallet-multisig`.
* Added a new event `DepositPoked` to be emitted upon a successful call
of the extrinsic.
* Although the immediate use of the extrinsic will be to give back some
of the deposit after the AH-migration, the extrinsic is written such
that it can work if the deposit decreases or increases (both).
* The call to the extrinsic would be `free` if an actual adjustment is
made to the deposit and `paid` otherwise.
* Added tests to test all scenarios.

## TO-DOs
* [x] Add Benchmark
* [x] Run CI cmd bot to benchmark

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>

This PR backports version bumps and prdocs reorg from the latest stable
branch back to master

closes https://github.com/paritytech/polkadot-sdk/issues/5742

Need to be backported to stable2503 release.

With the migration of staking accounts to [fungible
currency](https://github.com/paritytech/polkadot-sdk/pull/5501), we can
now allow pool users to stake directly and vice versa. This update
introduces a configurable filter mechanism to determine which accounts
can join a nomination pool.

## Example Usage  

### 1. Allow any account to join a pool  
To permit all accounts to join a nomination pool, use the `Nothing`
filter:

```rust
impl pallet_nomination_pools::Config for Runtime {
    ...
    type Filter = Nothing;
}
```

### 2. Restrict direct stakers from joining a pool

To prevent direct stakers from joining a nomination pool, use
`pallet_staking::AllStakers`:
```rust
impl pallet_nomination_pools::Config for Runtime {
    ...
    type Filter = pallet_staking::AllStakers<Runtime>;
}
```

### 3. Define a custom filter
For more gra...

# Description
Migrated polkadot-runtime-common paras_registrar benchmarking to the new
benchmarking syntax v2.
This is part of #6202

---------

Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>

# Description

Migrating polkadot-runtime-parachains paras_inherent benchmarking to the
new benchmarking syntax v2.
This is part of #6202

---------

Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>

# Description
Migrated polkadot-runtime-parachains initializer benchmarking to the new
benchmarking syntax v2.
This is part of #6202

Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>

# Description
Migrated polkadot-runtime-common crowdloan benchmarking to the new
benchmarking syntax v2.
this is part of #6202

Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>
Co-authored-by: seemantaggarwal <32275622+seemantaggarwal@users.noreply.github.com>

Partly fixes #7403

Subxt depends still on sp-crypto-hashing v0.7 but it's only one
dependency after removing the substrate-compat feature which is probably
"acceptable"

The `PayFees` instruction should only ever be used once. If it's used
more than once, it's just a noop.

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Adrian Catangiu <adrian@parity.io>

`sc-cli` brings rocksdb dependency into frame-benchmarking-cli when used
with `default-features = false`.
This PR makes rocksdb deps optional that sc-cli brings in some of the
crates. I think I covered all the crates that depend on sc-cli but
please let me know if I missed any.

Fixes: https://github.com/paritytech/polkadot-sdk/issues/3793

# Description

Fixes #7413

## Integration

This PR updates the `DryRunApi`. The signature of the `dry_run_call` is
changed, and the XCM version of the return values of `dry_run_xcm` now
follows the version of the input XCM program.

## Review Notes

* **The `DryRunApi` is modified**
* **Added the `Router::clear_messages` to `dry_run_xcm` common
implementation**
* **Fixed the xcmp-queue's Router's clear_messages: channels details'
first_index and last_index are reset when clearing**
* **The MIN_XCM_VERSION is added**
* The common implementation in the `pallet-xcm` is modified accordingly
* The `DryRunApi` tests are modified to account for testing old XCM
versions
* The implementation from the `pallet-xcm` is used where it was not used
(including the `DryRunApi` tests)
* All the runtime implementations are modified according to the Runtime
API change

---------

Co-authored-by: Adrian Catangiu <adrian@parity.io>

# Description

This PR introduces a lightweight log-capturing mechanism for XCM unit
tests, simplifying debugging by enabling structured log assertions. It
partially addresses #6119 and #6125, offering an optional way to verify
logs in tests while remaining unobtrusive in normal execution.

# Key Changes

* [x] Introduces a log capture utility in `sp_tracing`.
* [x] Adds XCM test examples demonstrating how and when to use log
capturing.

# Review Notes:

* The log capture mechanism is opt-in and does not affect existing tests
unless explicitly used.
* The implementation is minimal and does not add complexity to existing
test setups.
* It provides a structured alternative to
[`sp_tracing::init_for_tests()`](https://paritytech.github.io/polkadot-sdk/master/sp_tracing/fn.init_for_tests.html)
for log verification in automated tests.

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Auto-update of all weights for 2025-02-21-1740149841.

Subweight results:
- [now vs
master](https://weights.tasty.limo/compare?repo=polkadot-sdk&threshold=5&path_pattern=.%2F**%2Fweights%2F**%2F*.rs%2C.%2F**%2Fweights.rs&method=asymptotic&ignore_errors=true&unit=time&old=master&new=update-weights-weekly-2025-02-21-1740149841)
- [now vs polkadot-v1.15.6
(2025-01-16)](https://weights.tasty.limo/compare?repo=polkadot-sdk&threshold=5&path_pattern=.%2F**%2Fweights%2F**%2F*.rs%2C.%2F**%2Fweights.rs&method=asymptotic&ignore_errors=true&unit=time&old=polkadot-v1.15.6&new=update-weights-weekly-2025-02-21-1740149841)
- [now vs polkadot-v1.16.2
(2024-11-14)](https://weights.tasty.limo/compare?repo=polkadot-sdk&threshold=5&path_pattern=.%2F**%2Fweights%2F**%2F*.rs%2C.%2F**%2Fweights.rs&method=asymptotic&ignore_errors=true&unit=time&old=polkadot-v1.16.2&new=update-weights-weekly-2025-02-21-1740149841)

Co-authored-by: github-actions[bot] <41898282+github-act...

# Description

Creating this PR to changed Rotko Networks bootnode addresses to the new
structure.

Rotko bootnode addresses tested with this results:

```
{
    "asset-hub-kusama": {
      "bootnode": "/dns/asset-hub-kusama.boot.rotko.net/tcp/30435/wss/p2p/12D3KooWJUFnjR2PNbsJhudwPVaWCoZy1acPGKjM2cSuGj345BBu",
      "discovered_peers": 3,
      "error_details": null,
      "id": "rotko",
      "network": "asset-hub-kusama",
      "status": "success",
      "test_duration_ms": 19394,
      "valid": true
    },
    "asset-hub-polkadot": {
      "bootnode": "/dns/asset-hub-polkadot.boot.rotko.net/tcp/30435/wss/p2p/12D3KooWKkzLjYF6M5eEs7nYiqEtRqY8SGVouoCwo3nCWsRnThDW",
      "discovered_peers": 5,
      "error_details": null,
      "id": "rotko",
      "network": "asset-hub-polkadot",
      "status": "success",
      "test_duration_ms": 5024,
      "valid": true
    },
    "asset-hub-westend": {
      "bootnode": "/dns/asset-hub-westend.boot.rotko.net/tcp/30...

# Description

Added logs in pallet-xcm to help in debugging, fixes #2408, and in
continuation of #4982

# Checklist

- [x]
https://github.com/paritytech/polkadot-sdk/blob/master/polkadot/xcm/xcm-builder/src/
- [x]
https://github.com/paritytech/polkadot-sdk/tree/master/cumulus/parachains/runtimes/assets/common/src
- [x] runtime-defined XCM filters/converters (just [one
example](https://github.com/paritytech/polkadot-sdk/blob/183b55aa

/cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/src/xcm_config.rs#L284))

Polkadot Address: 1Gz5aLtEu2n4jsfA6XwtZnuaRymJrDDw4kEGdNHTdxrpzrc

---------

Co-authored-by: Ayevbeosa Iyamu <aiyamu@vatebra.com>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: Adrian Catangiu <adrian@parity.io>
Co-authored-by: Raymond Cheung <178801527+raymondkfcheung@users.noreply.github.com>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.gi...>

The test was flaky and was disabled here
https://github.com/paritytech/polkadot-sdk/issues/6345, looked at the
flakiness
https://github.com/paritytech/polkadot-sdk/issues/6345#issuecomment-2674063608
and it wasn't because of some bug in our production code, but because of
the way the test interacts with the infrastructure.

Since https://github.com/paritytech/polkadot-sdk/pull/7504 this test is
now testing redundant things that other tests like
0009-approval-voting-coalescing.toml and 0006-parachains-max-tranche0
already cover, so instead of investing trying to fix it, just remove it.

Fixes: https://github.com/paritytech/polkadot-sdk/issues/6345

Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>

# Description

* This PR adds a new extrinsic `reconsider` to `pallet-indices`. This
extrinsic will be used to re-adjust the deposits made in the pallet.
* Part of #5591 

## Review Notes

* Added a new extrinsic `reconsider` in `pallet-indices`.
* Added a new event `DepositReconsidered` to be emitted upon a
successful call of the extrinsic.
* Although the immediate use of the extrinsic will be to give back some
of the deposit after the AH-migration, the extrinsic is written such
that it can work if the deposit decreases or increases (both).
* The call to the extrinsic would be `free` if an actual adjustment is
made to the deposit and `paid` otherwise.
* Added tests to test all scenarios.
* Added a benchmark to test the "worst case" (maximum compute) flow of
the extrinsic which is when the deposit amount is updated to a new
value.

## TO-DOs

* [x] Run CI cmd bot to benchmark

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Ref https://github.com/paritytech/ci_cd/issues/1107

We mainly need that so that we can finally compile the `pallet_revive`
fixtures on stable. I did my best to keep the commits focused on one
thing to make review easier.

All the changes are needed because rustc introduced more warnings or is
more strict about existing ones. Most of the stuff could just be fixed
and the commits should be pretty self explanatory. However, there are a
few this that are notable:

## `non_local_definitions `

A lot of runtimes to write `impl` blocks inside functions. This makes
sense to reduce the amount of conditional compilation. I guess I could
have moved them into a module instead. But I think allowing it here
makes sense to avoid the code churn.

## `unexpected_cfgs`

The FRAME macros emit code that references various features like `std`,
`runtime-benchmarks` or `try-runtime`. If a create that uses those
macros does not have those features we get this warning. Those were
mostly when ...

Related to https://github.com/paritytech/polkadot-sdk/issues/7360

Derive `DecodeWithMemTracking` for the structures in the cumulus pallets
and for the structures in the `polkadot-sdk` runtimes.

The PR contains no functional changes and no manual implementation. Just
deriving `DecodeWithMemTracking`.

Just deriving `DecodeWithMemTracking` for the types used by the bridge,
snowbridge and xcm pallets

XCM: Deny barrier checks for nested XCMs with specific instructions to be executed on the local chain (#7200)

Resolves (partially):
https://github.com/paritytech/polkadot-sdk/issues/7148
Depends on: https://github.com/paritytech/polkadot-sdk/pull/7169

# Description

This PR addresses partially #7148 (Problem 2) and ensures the proper
checking of nested local instructions. It introduces a new barrier -
`DenyRecursively` - to provide more refined control over instruction
denial. The main change is the replacement of `DenyThenTry<Deny, Allow>`
with `DenyThenTry<DenyRecursively<Deny>, Allow>` which handles both
top-level and nested local instructions by applying allow condition
after denial.

For context and additional information, please refer to [_Problem 2 -
Barrier vs nested XCM
validation_](https://github.com/paritytech/polkadot-sdk/issues/7148).

# TODO
- [x] Evaluate PoC, more details at #7351:
    - **DenyNestedXcmInstructions**: Keep it as it is and be explicit:
        1. Name the Deny barriers for the top level.
2. Name the Deny barrier for nested with `DenyInstructionsWithXcm`.
- **DenyThenTry<DenyInstructionsWithXcm<Deny>, Allow>**: Alternatively,
hard-code those three instructions in `DenyThenTry`, so we wouldn’t need
`DenyInstructionsWithXcm`. However, this approach wouldn’t be as
general.
- **DenyInstructionsWithXcmFor**: Another possibility is to check
`DenyInstructionsWithXcm::Inner` for the actual `message`, so we don’t
need duplication for top-level and nested (not sure, maybe be explicit
is good thing) - see _Problem2 - example_. Instead of this:
   ```
  DenyThenTry<
                (
                               // Deny for top level XCM program 
                               DenyReserveTransferToRelayChain,
// Dedicated barrier for nested XCM programs
                               DenyInstructionsWithXcmFor<
// Repeat all Deny filters here
DenyReserveTransferToRelayChain,
                                >
                ),
   ```
  we could just use:
   ```
  DenyThenTry<
                (
                               // Dedicated barrier for XCM programs
                               DenyInstructionsWithXcmFor<
// Add all `Deny` filters here
DenyReserveTransferToRelayChain,
                                                ...
                                >
                ),
   ```
- [POC
Evaluation](https://github.com/paritytech/polkadot-sdk/pull/7200#discussion_r1939288792)
- [x] Consider better name `DenyInstructionsWithXcm` =>
`DenyRecursively`, more details at
[here](https://github.com/paritytech/polkadot-sdk/pull/7200#discussion_r1958588973)
- [x] Clean-up and docs
- [x] Merge https://github.com/paritytech/polkadot-sdk/pull/7169 or
rebase this branch on the top of `yrong:fix-for-deny-then-try`
- [x] Set for the runtimes where we use `DenyThenTry<Deny, Allow>` =>
`DenyThenTry<DenyRecursively<Deny>, Allow>`
- [ ] Schedule sec.audit

---------

Co-authored-by: Raymond Cheung <178801527+raymondkfcheung@users.noreply.github.com>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: ron <yrong1997@gmail.com>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
Co-authored-by: Clara van Staden <claravanstaden64@gmail.com>
Co-authored-by: Adrian Catangiu <adrian@parity.io>

Fix issue where setting the `remote_fees` field of `InitiateTransfer` to
`None` could lead to unintended bypassing of fees in certain conditions.

Changes made to fix this:
- `remote_fees: None` now results in the `UnpaidExecution` instruction
being appended *after* the origin altering instruction, be it
`AliasOrigin` or `ClearOrigin`. This means `preserve_origin: true` must
be set if you want to have any chance of not paying for fees.
- The `AliasOrigin` instruction is not appended if the executor is
called with the root location (`Here`) since it would alias to itself.
Although this self-aliasing could be done, it needs the ecosystem to add
a new aliasing instruction, so we just skip it.
- Tweaked the `AllowExplicitUnpaidExecutionFrom` barrier to allow
receiving assets (via teleport or reserve asset transfer) and altering
the origin before actually using `UnpaidExecution`. This is to allow
unpaid teleports to work with `InitiateTransfer`.
- For this, the barrier now executes origin altering instructions and
keeps track of the modified origin. It then checks if this final origin
has enough permissions to not pay for fees. In order to follow the
`AliasOrigin` instruction it now takes a new generic `Aliasers` that
should be set to the XCM config item of the same name. This new generic
has a default value of `()`, effectively disallowing the use of
`AliasOrigin`.

---------

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Adrian Catangiu <adrian@parity.io>

Add a new extrinsic `dispatch_as_fallible`.

It's almost the same as [`Pallet::dispatch_as`] but forwards any error
of the inner call.

Closes #219.

And add more unit tests to cover `dispatch_as` and
`dispatch_as_fallible`.

---

Polkadot address: 156HGo9setPcU2qhFMVWLkcmtCEGySLwNqa3DaEiYSWtte4Y

---------

Signed-off-by: Xavier Lau <x@acg.box>
Co-authored-by: Bastian Köcher <git@kchr.de>
Co-authored-by: Bastian Köcher <info@kchr.de>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

closes https://github.com/paritytech/polkadot-sdk/issues/6508.

## TODO
- [x] Migrate storage `DisabledValidators` both in pallet-session and
pallet-staking.
- [ ] Test that disabled validator resets at era change.
- [ ] Add always sorted try-runtime test for `DisabledValidators`.
- [ ] More test coverage for the disabling logic.

---------

Co-authored-by: Gonçalo Pestana <g6pestana@gmail.com>
Co-authored-by: command-bot <>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: kianenigma <kian@parity.io>
Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

closes https://github.com/paritytech/polkadot-sdk/issues/3610.

helps https://github.com/paritytech/polkadot-sdk/issues/6344, but need
to migrate storage `Offences::Reports` before we can remove exposure
dependency in RC pallets.

replaces https://github.com/paritytech/polkadot-sdk/issues/6788.

## Context  
Slashing in staking is unbounded currently, which is a major blocker
until staking can move to a parachain (AH).

### Current Slashing Process (Unbounded)  

1. **Offence Reported**  
- Offences include multiple validators, each with potentially large
exposure pages.
- Slashes are **computed immediately** and scheduled for application
after **28 eras**.

2. **Slash Applied**  
- All unapplied slashes are executed in **one block** at the start of
the **28th era**. This is an **unbounded operation**.


### Proposed Slashing Process (Bounded)  

1. **Offence Queueing**  
   - Offences are **queued** after basic sanity checks.  

2. **Paged Offence Processing (Computing Slash)**  
   - Slashes are **computed one validator exposure page at a time**.  
   - **Unapplied slashes** are stored in a **double map**:  
     - **Key 1 (k1):** `EraIndex`  
- **Key 2 (k2):** `(Validator, SlashFraction, PageIndex)` — a unique
identifier for each slash page

3. **Paged Slash Application**  
- Slashes are **applied one page at a time** across multiple blocks.
- Slash application starts at the **27th era** (one era earlier than
before) to ensure all slashes are applied **before stakers can unbond**
(which starts from era 28 onwards).

---

## Worst-Case Block Calculation for Slash Application  

### Polkadot:  
- **1 era = 24 hours**, **1 block = 6s** → **14,400 blocks/era**  
- On parachains (**12s blocks**) → **7,200 blocks/era**  

### Kusama:  
- **1 era = 6 hours**, **1 block = 6s** → **3,600 blocks/era**  
- On parachains (**12s blocks**) → **1,800 blocks/era**  

### Worst-Case Assumptions:  
- **Total stakers:** 40,000 nominators, 1000 validators. (Polkadot
currently has ~23k nominators and 500 validators)
- **Max slashed:** 50% so 20k nominators, 250 validators.  
- **Page size:** Validators with multiple page: (512 + 1)/2 = 256 ,
Validators with single page: 1

### Calculation:  
There might be a more accurate way to calculate this worst-case number,
and this estimate could be significantly higher than necessary, but it
shouldn’t exceed this value.

Blocks needed: 250 + 20k/256 = ~330 blocks.

##  *Potential Improvement:*  
- Consider adding an **Offchain Worker (OCW)** task to further optimize
slash application in future updates.
- Dynamically batch unapplied slashes based on number of nominators in
the page, or process until reserved weight limit is exhausted.

----
## Summary of Changes  

### Storage  
- **New:**  
  - `OffenceQueue` *(StorageDoubleMap)*  
    - **K1:** Era  
    - **K2:** Offending validator account  
    - **V:** `OffenceRecord`  
  - `OffenceQueueEras` *(StorageValue)*  
    - **V:** `BoundedVec<EraIndex, BoundingDuration>`  
  - `ProcessingOffence` *(StorageValue)*  
    - **V:** `(Era, offending validator account, OffenceRecord)`  

- **Changed:**  
  - `UnappliedSlashes`:  
    - **Old:** `StorageMap<K -> Era, V -> Vec<UnappliedSlash>>`  
- **New:** `StorageDoubleMap<K1 -> Era, K2 -> (validator_acc, perbill,
page_index), V -> UnappliedSlash>`

### Events  
- **New:**  
  - `SlashComputed { offence_era, slash_era, offender, page }`  
  - `SlashCancelled { slash_era, slash_key, payout }`  

### Error  
- **Changed:**  
  - `InvalidSlashIndex` → Renamed to `InvalidSlashRecord`  
- **Removed:**  
  - `NotSortedAndUnique`  
- **Added:**  
  - `EraNotStarted`  

### Call  
- **Changed:**  
  - `cancel_deferred_slash(era, slash_indices: Vec<u32>)`  
    → Now takes `Vec<(validator_acc, slash_fraction, page_index)>`  
- **New:**  
- `apply_slash(slash_era, slash_key: (validator_acc, slash_fraction,
page_index))`

### Runtime Config  
- `FullIdentification` is now set to a unit type (`()`) / null identity,
replacing the previous exposure type for all runtimes using
`pallet_session::historical`.

## TODO
- [x] Fixed broken `CancelDeferredSlashes`.
- [x] Ensure on_offence called only with validator account for
identification everywhere.
- [ ] Ensure we never need to read full exposure.
- [x] Tests for multi block processing and application of slash.
- [x] Migrate UnappliedSlashes 
- [x] Bench (crude, needs proper bench as followup)
  - [x] on_offence()
  - [x] process_offence()
  - [x] apply_slash()
 
 
## Followups (tracker
[link](https://github.com/paritytech/polkadot-sdk/issues/7596))
- [ ] OCW task to process offence + apply slashes.
- [ ] Minimum time for governance to cancel deferred slash.
- [ ] Allow root or staking admin to add a custom slash.
- [ ] Test HistoricalSession proof works fine with eras before removing
exposure as full identity.
- [ ] Properly bench offence processing and slashing.
- [ ] Handle Offences::Reports migration when removing validator
exposure as identity.

---------

Co-authored-by: Gonçalo Pestana <g6pestana@gmail.com>
Co-authored-by: command-bot <>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: kianenigma <kian@parity.io>
Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Preparation for AHM and making stuff public.

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Dónal Murray <donal.murray@parity.io>

Returning an iterator in `TracksInfo::tracks()` instead of a static
slice allows for more flexible implementations of `TracksInfo` that can
use the chain storage without compromising a lot on the
performance/memory penalty if we were to return an owned `Vec` instead.

---------

Co-authored-by: Pablo Andrés Dorado Suárez <hola@pablodorado.com>

Closes #4315

---------

Co-authored-by: Guillaume Thiolliere <guillaume.thiolliere@parity.io>

# Utility Call Fallback

This introduces a new extrinsic: **`if_else`**

Which first attempts to dispatch the `main` call(s). If the `main`
call(s) fail, the `fallback` call(s) is dispatched instead. Both calls
are executed with the same origin.

In the event of a fallback failure the whole call fails with the weights
returned.

## Use Case
Some use cases might involve submitting a `batch` type call in either
main, fallback or both.

Resolves #6000

Polkadot Address: 1HbdqutFR8M535LpbLFT41w3j7v9ptEYGEJKmc6PKpqthZ8

---------

Co-authored-by: rainbow-promise <154476501+rainbow-promise@users.noreply.github.com>
Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

## Multi Block Election Pallet

This PR adds the first iteration of the multi-block staking pallet. 

From this point onwards, the staking and its election provider pallets
are being customized to work in AssetHub. While usage in solo-chains is
still possible, it is not longer the main focus of this pallet. For a
safer usage, please fork and user an older version of this pallet.

---

## Replaces

- [x] https://github.com/paritytech/polkadot-sdk/pull/6034 
- [x] https://github.com/paritytech/polkadot-sdk/pull/5272

## Related PRs: 

- [x] https://github.com/paritytech/polkadot-sdk/pull/7483
- [ ] https://github.com/paritytech/polkadot-sdk/pull/7357
- [ ] https://github.com/paritytech/polkadot-sdk/pull/7424
- [ ] https://github.com/paritytech/polkadot-staking-miner/pull/955

This branch can be periodically merged into
https://github.com/paritytech/polkadot-sdk/pull/7358 ->
https://github.com/paritytech/polkadot-sdk/pull/6996

## TODOs: 

- [x] rebase to master 
- Benchmarking for staking critical path
  - [x] snapshot
  - [x] election result
- Benchmarking for EPMB critical path
  - [x] snapshot
  - [x] verification
  - [x] submission
  - [x] unsigned submission
  - [ ] election results fetching
- [ ] Fix deletion weights. Either of
  - [ ] Garbage collector + lazy removal of all paged storage items
  - [ ] Confirm that deletion is small PoV footprint.
- [ ] Move election prediction to be push based. @tdimitrov 
- [ ] integrity checks for bounds 
- [ ] Properly benchmark this as a part of CI -- for now I will remove
them as they are too slow
- [x] add try-state to all pallets
- [x] Staking to allow genesis dev accounts to be created internally
- [x] Decouple miner config so @niklasad1 can work on the miner
72841b73
- [x] duplicate snapshot page reported by @niklasad1

 
- [ ] https://github.com/paritytech/polkadot-sdk/pull/6520 or equivalent
-- during snapshot, `VoterList` must be locked
- [ ] Move target snapshot to a separate block

---------

Co-authored-by: Gonçalo Pestana <g6pestana@gmail.com>
Co-authored-by: Ankan <10196091+Ank4n@users.noreply.github.com>
Co-authored-by: command-bot <>
Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
Co-authored-by: Giuseppe Re <giuseppe.re@parity.io>
Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com>