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3 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Ankan
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00b85c51df |
[NPoS] Paging reward payouts in order to scale rewardable nominators (#1189)
helps https://github.com/paritytech/polkadot-sdk/issues/439. closes https://github.com/paritytech/polkadot-sdk/issues/473. PR link in the older substrate repository: https://github.com/paritytech/substrate/pull/13498. # Context Rewards payout is processed today in a single block and limited to `MaxNominatorRewardedPerValidator`. This number is currently 512 on both Kusama and Polkadot. This PR tries to scale the nominators payout to an unlimited count in a multi-block fashion. Exposures are stored in pages, with each page capped to a certain number (`MaxExposurePageSize`). Starting out, this number would be the same as `MaxNominatorRewardedPerValidator`, but eventually, this number can be lowered through new runtime upgrades to limit the rewardeable nominators per dispatched call instruction. The changes in the PR are backward compatible. ## How payouts would work like after this change Staking exposes two calls, 1) the existing `payout_stakers` and 2) `payout_stakers_by_page`. ### payout_stakers This remains backward compatible with no signature change. If for a given era a validator has multiple pages, they can call `payout_stakers` multiple times. The pages are executed in an ascending sequence and the runtime takes care of preventing double claims. ### payout_stakers_by_page Very similar to `payout_stakers` but also accepts an extra param `page_index`. An account can choose to payout rewards only for an explicitly passed `page_index`. **Lets look at an example scenario** Given an active validator on Kusama had 1100 nominators, `MaxExposurePageSize` set to 512 for Era e. In order to pay out rewards to all nominators, the caller would need to call `payout_stakers` 3 times. - `payout_stakers(origin, stash, e)` => will pay the first 512 nominators. - `payout_stakers(origin, stash, e)` => will pay the second set of 512 nominators. - `payout_stakers(origin, stash, e)` => will pay the last set of 76 nominators. ... - `payout_stakers(origin, stash, e)` => calling it the 4th time would return an error `InvalidPage`. The above calls can also be replaced by `payout_stakers_by_page` and passing a `page_index` explicitly. ## Commission note Validator commission is paid out in chunks across all the pages where each commission chunk is proportional to the total stake of the current page. This implies higher the total stake of a page, higher will be the commission. If all the pages of a validator's single era are paid out, the sum of commission paid to the validator across all pages should be equal to what the commission would have been if we had a non-paged exposure. ### Migration Note Strictly speaking, we did not need to bump our storage version since there is no migration of storage in this PR. But it is still useful to mark a storage upgrade for the following reasons: - New storage items are introduced in this PR while some older storage items are deprecated. - For the next `HistoryDepth` eras, the exposure would be incrementally migrated to its corresponding paged storage item. - Runtimes using staking pallet would strictly need to wait at least `HistoryDepth` eras with current upgraded version (14) for the migration to complete. At some era `E` such that `E > era_at_which_V14_gets_into_effect + HistoryDepth`, we will upgrade to version X which will remove the deprecated storage items. In other words, it is a strict requirement that E<sub>x</sub> - E<sub>14</sub> > `HistoryDepth`, where E<sub>x</sub> = Era at which deprecated storages are removed from runtime, E<sub>14</sub> = Era at which runtime is upgraded to version 14. - For Polkadot and Kusama, there is a [tracker ticket](https://github.com/paritytech/polkadot-sdk/issues/433) to clean up the deprecated storage items. ### Storage Changes #### Added - ErasStakersOverview - ClaimedRewards - ErasStakersPaged #### Deprecated The following can be cleaned up after 84 eras which is tracked [here](https://github.com/paritytech/polkadot-sdk/issues/433). - ErasStakers. - ErasStakersClipped. - StakingLedger.claimed_rewards, renamed to StakingLedger.legacy_claimed_rewards. ### Config Changes - Renamed MaxNominatorRewardedPerValidator to MaxExposurePageSize. ### TODO - [x] Tracker ticket for cleaning up the old code after 84 eras. - [x] Add companion. - [x] Redo benchmarks before merge. - [x] Add Changelog for pallet_staking. - [x] Pallet should be configurable to enable/disable paged rewards. - [x] Commission payouts are distributed across pages. - [x] Review documentation thoroughly. - [x] Rename `MaxNominatorRewardedPerValidator` -> `MaxExposurePageSize`. - [x] NMap for `ErasStakersPaged`. - [x] Deprecate ErasStakers. - [x] Integrity tests. ### Followup issues [Runtime api for deprecated ErasStakers storage item](https://github.com/paritytech/polkadot-sdk/issues/426) --------- Co-authored-by: Javier Viola <javier@parity.io> Co-authored-by: Ross Bulat <ross@parity.io> Co-authored-by: command-bot <> |
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Przemek Rzad
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bfb241d7f3 |
Add missing licenses and tune the scanning workflow (#1288)
* Add missing Cumulus licenses * Typo * Add missing Substrate licenses * Single job checking the sub-repos in steps * Remove dates * Remove dates * Add missing (C) * Update FRAME UI tests Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> * Update more UI tests Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> --------- Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> |
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Gonçalo Pestana
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2f1ec07953 |
Staking and nomination pools runtime API improvements (#13119)
* Adds StakingAPI_nominations_quota and NominationPoolsApi_balanceToPoint and NominationPoolsApi_pointsToBalance runtime APIs * Adds balance param to api_nominations_quota * Update frame/nomination-pools/src/lib.rs Co-authored-by: Anton <anton.kalyaev@gmail.com> * Update frame/nomination-pools/src/lib.rs Co-authored-by: Anton <anton.kalyaev@gmail.com> * Addresses comments - returns zero instead of error in runtime api * Update frame/staking/runtime-api/src/lib.rs Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> * Update frame/staking/runtime-api/src/lib.rs Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> * Addresses PR comments * Update frame/nomination-pools/runtime-api/Cargo.toml Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> * Fixes points_to_balance logic; adds tests * test comment fix * Update frame/nomination-pools/runtime-api/src/lib.rs Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> * Update frame/nomination-pools/runtime-api/src/lib.rs Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> * Fix block pruning (#13323) * Referendum proposal's metadata (#12568) * referenda metadata * todo comment * remove TODO, update rustdocs * referenda clear_metadata origin signed or root * referenda metadata unit tests * drop schema type for referenda metadata * remove metadata type * referenda metadata benches * note different preimages * metadata for democracy pallet * metadata democracy pallet tests and benches * fix cargo clippy * update docs * ".git/.scripts/bench-bot.sh" pallet dev pallet_democracy * ".git/.scripts/bench-bot.sh" pallet dev pallet_referenda * Update the doc frame/democracy/src/lib.rs Co-authored-by: Roman Useinov <roman.useinov@gmail.com> * Update the doc frame/democracy/src/lib.rs Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com> * reference instead clone for take Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com> * error rename BadMetadata to PreimageNotExist * clear metadata within internal_cancel_referendum fn * remove redundant clone * collapse metadata api into one set_metadata method * fmt * review fixes * not request preimage on set_metadata * rename events and update docs * ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_democracy * ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_referenda * rename reset_metadata to transfer_metadata --------- Co-authored-by: command-bot <> Co-authored-by: Roman Useinov <roman.useinov@gmail.com> Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com> * Improve test coverage of the `Notifications` protocol (#13033) * Add handler and upgrade tests * Add tests for `behaviour.rs` * Apply review comments * Update dependencies * Apply suggestions from code review Co-authored-by: Dmitry Markin <dmitry@markin.tech> * Apply review comments * Fix clippy * Update mockall * Apply review comment --------- Co-authored-by: Dmitry Markin <dmitry@markin.tech> * refactors runtime API logic to own pallet impl block * removes unrelated changes * Fixes cargo doc comments lint * fixes node cargo * fixes comment * restart ci * restart ci * restart ci --------- Co-authored-by: Anton <anton.kalyaev@gmail.com> Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> Co-authored-by: parity-processbot <> Co-authored-by: Arkadiy Paronyan <arkady.paronyan@gmail.com> Co-authored-by: Muharem Ismailov <ismailov.m.h@gmail.com> Co-authored-by: Roman Useinov <roman.useinov@gmail.com> Co-authored-by: Anthony Alaribe <anthonyalaribe@gmail.com> Co-authored-by: Aaro Altonen <48052676+altonen@users.noreply.github.com> Co-authored-by: Dmitry Markin <dmitry@markin.tech> |