asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama and enable buffered election export by lexnv · Pull Request #1018 · polkadot-fellows/runtimes

lexnv · 2025-11-24T16:16:04Z

This PR configures the AssetHubKusama runtime to utilize elastic scaling with 3 cores.

the runtime is prepared for elastic scaling with expected 2s block times
3 cores will be assigned to AHK when we have sufficient confidence in testing stacks
AHK should function similarly with expected 6s block times until cores are assigned

cc @skunert @sandreim

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

github-actions · 2025-11-24T16:25:54Z

Review required! Latest push from author must always be reviewed

github-actions

Found one issue regarding a duplicated constant definition which could lead to future maintenance problems.

system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

CHANGELOG.md

system-parachains/constants/src/kusama.rs

sigurpol · 2025-12-04T15:15:33Z

A small followup on staking side: paritytech/polkadot-sdk#10311 has been now merged (cc @Ank4n ).
Which means we can target for #1018 and #10311 the same release.
#10311 has also been requested to be audited.
Which branches should we backport 10311 to? 2509 and 2512 or also 2507 ? Thanks! Feel free to ping @Ank4n and myself to coordinate the release at any point in time 🙇

Ank4n · 2025-12-04T15:25:40Z

A small followup on staking side: paritytech/polkadot-sdk#10311 has been now merged (cc @Ank4n ). Which means we can target for #1018 and #10311 the same release. #10311 has also been requested to be audited. Which branches should we backport 10311 to? 2509 and 2512 or also 2507 ? Thanks! Feel free to ping @Ank4n and myself to coordinate the release at any point in time 🙇

To give more context: multi-cores can lead to shorter eras (good to avoid but not disaster). The #10311 would mitigate that (and can go to Kusama before audit is done). I will make a PR with the changes to the runtime once its backported to 2507.

lexnv · 2025-12-05T16:39:51Z

Thanks @sigurpol and @Ank4n 🙏

Indeed, let's align and include both PRs:

in a release. It looks like more tests are failing and we really need paritytech/polkadot-sdk#10541 to unblock the CI here 🙏

Co-authored-by: Bastian Köcher <git@kchr.de>

This reverts commit 1e762d5.

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

…times

…ata (#10541) This PR ensures that the parachains test-utils crate has 2 relay parent descendants for testing purposes. Effectively fixes a panic because we missed this mock data for chains that started with `RP_offset > 0`: ``` Unable to verify provided relay parent descendants. expected_rp_descendants_num: 1 error: InvalidNumberOfDescendants { expected: 2, received: 0 } note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace ``` Detected in: - https://github.com/polkadot-fellows/runtimes/actions/runs/19857064730/job/56897622908?pr=1018 Unblocks: - polkadot-fellows/runtimes#1018 Inspired by a similar fix I've introduced in: - #9880 --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Bastian Köcher <git@kchr.de>

…ata (#10541) This PR ensures that the parachains test-utils crate has 2 relay parent descendants for testing purposes. Effectively fixes a panic because we missed this mock data for chains that started with `RP_offset > 0`: ``` Unable to verify provided relay parent descendants. expected_rp_descendants_num: 1 error: InvalidNumberOfDescendants { expected: 2, received: 0 } note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace ``` Detected in: - https://github.com/polkadot-fellows/runtimes/actions/runs/19857064730/job/56897622908?pr=1018 Unblocks: - polkadot-fellows/runtimes#1018 Inspired by a similar fix I've introduced in: - #9880 --------- Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Co-authored-by: cmd[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Bastian Köcher <git@kchr.de> (cherry picked from commit 0f28d81)

…times

…s-3-cores-ahk Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

lexnv · 2025-12-12T12:34:10Z

Have rebased this PR on top of:

[KAH] Enable buffered election export #1034
- which is built on top of: Upgrade to unstable2507 #1029

The changes added from my part are limited to:

elastic scaling enablement on ahk
bumping xcm-emulator: 9e5030f (which is relevant for passing tests)

system-parachains/asset-hubs/asset-hub-kusama/src/staking/mod.rs

Ank4n · 2025-12-16T11:06:25Z

system-parachains/asset-hubs/asset-hub-polkadot/src/staking/mod.rs

 	type SendToRelayChain = StakingXcmToRelayChain;
 	type MaxValidatorSetRetries = ConstU32<64>;
+	// export validators as soon as election results are ready.
+	type ValidatorSetExportSession = ConstU32<0>;


cc: @sigurpol

system-parachains/asset-hubs/asset-hub-kusama/src/staking/mod.rs

bkchr · 2025-12-17T22:29:18Z

Done via: #1037

acatangiu · 2025-12-18T08:41:50Z

rebased on master and double-checked the diff against #1037 and they are almost identical (only diffs are toml formatting changes and spec bumps) - closing this in favor of #1037

lexnv added 3 commits November 24, 2025 16:06

ahk: Enable ElasticScaling with 3 cores on asset hub kusama

1c0cac3

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

ahk: Expose RELAY_PARENT_OFFSET via runtime api

b44d9a5

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

changelog: add PR

b6d1158

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

lexnv changed the title ~~ahk: Enable ElasticScaling with 3 cores on asset hub kusama~~ ahk: Prepare ElasticScaling with 3 cores on asset hub kusama Nov 24, 2025

changelog: Change pr title name

b1a8274

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

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lexnv mentioned this pull request Nov 25, 2025

[ElasticScaling] Overarching tracking issue: Enable ElasticScaling on AHKusama and AHPolkadot paritytech/polkadot-sdk#10425

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lexnv added 3 commits December 2, 2025 10:33

Merge remote-tracking branch 'origin/main' into lexnv/es-3-cores-ahk

e879851

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

kusama: Add elastic scaling constants

8928d30

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

ahk: Add missing parent offset

cf16fad

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

sandreim approved these changes Dec 2, 2025

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lexnv mentioned this pull request Dec 4, 2025

test-utils/fix: Parachains test-utils relay parent descendants mock data paritytech/polkadot-sdk#10541

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lexnv added 2 commits December 4, 2025 14:19

Merge remote-tracking branch 'origin/main' into lexnv/es-3-cores-ahk

13a3b08

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

ahk: Disable tests that rely on the pending unreleased fix

1e762d5

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

lexnv mentioned this pull request Dec 4, 2025

asset-hub-kusama: Re-enable ignored tests once descendants fix is released #1024

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bkchr approved these changes Dec 4, 2025

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system-parachains/constants/src/kusama.rs Outdated Show resolved Hide resolved

lexnv and others added 6 commits December 9, 2025 18:25

Update system-parachains/constants/src/kusama.rs

6a5a09e

Co-authored-by: Bastian Köcher <git@kchr.de>

Update CHANGELOG.md

9f88bd3

Co-authored-by: Bastian Köcher <git@kchr.de>

Revert "ahk: Disable tests that rely on the pending unreleased fix"

4558185

This reverts commit 1e762d5.

Merge remote-tracking branch 'origin/main' into lexnv/es-3-cores-ahk

a90eb65

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

Update crates to unstable2507

4d07c65

Merge branch 'main' of https://github.com/TorstenStueber/polkadot-run…

5137407

…times

lexnv changed the title ~~ahk: Prepare ElasticScaling with 3 cores on asset hub kusama~~ asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama Dec 10, 2025

Add PR feedback

e931c2e

TorstenStueber and others added 13 commits December 11, 2025 05:06

Correct the WeightToFee multiplier

79d5244

Disable fixture compilation for clippy

78f1882

Merge branch 'main' into main

43e1bb4

Fix CI

82c8b76

Merge branch 'main' of https://github.com/TorstenStueber/polkadot-run…

7871e45

…times

Fix fmt and change config values

11e5bed

Update Cargo.toml

18a091f

Merge branch 'main' into main

85ca8d8

bump staking async

de4c664

update changelog

11a801c

fmt

ac82b80

Merge remote-tracking branch 'ank/upgrade-unstable-2507' into lexnv/e…

f370a24

…s-3-cores-ahk Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

cargo: Update xcm-emulator to pass tests

9e5030f

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

lexnv changed the title ~~asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama~~ asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama and enable buffered election export Dec 12, 2025

lexnv mentioned this pull request Dec 12, 2025

[ElasticScaling] Kusama AH Rollout Checklist paritytech/polkadot-sdk#10637

Closed

11 tasks

Ank4n mentioned this pull request Dec 12, 2025

[KAH] Enable buffered election export #1034

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Ank4n reviewed Dec 16, 2025

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sigurpol approved these changes Dec 16, 2025

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lexnv mentioned this pull request Dec 16, 2025

asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama and enable buffered election #1037

Merged

bkchr closed this Dec 17, 2025

acatangiu reopened this Dec 18, 2025

Merge branch 'main' into lexnv/es-3-cores-ahk

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acatangiu closed this Dec 18, 2025

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asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama and enable buffered election export#1018

asset-hub-kusama: Prepare ElasticScaling with 3 cores on asset hub kusama and enable buffered election export#1018
lexnv wants to merge 30 commits intopolkadot-fellows:mainfrom
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