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Bound Election and Staking by MaxActiveValidators (#12436)

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* bounding election provider with kian

* multi phase implement bounded election provider

* election provider blanket implementation

* staking compiles

* fix test for election provider support

* fmt

* fixing epmp tests, does not compile yet

* fix epmp tests

* fix staking tests

* fmt

* fix runtime tests

* fmt

* remove outdated wip tags

* add enum error

* sort and truncate supports

* comment

* error when unsupported number of election winners

* compiling wip after kian's suggestions

* fix TODOs

* remove,fix tags

* ensure validator count does not exceed maxwinners

* clean up

* some more clean up and todos

* handle too many winners

* rename parameter for mock

* todo

* add sort and truncate rule if there are too many winners

* fmt

* fail, not swallow emergency result bound not met

* remove too many winners resolution as it can be guaranteed to be bounded

* fix benchmark

* give MaxWinners more contextual name

* make ready solution generic over T

* kian feedback

* fix stuff

* Kian's way of solvign this

* comment fix

* fix compile

* remove use of BoundedExecution

* fmt

* comment out failing integrity test

* cap validator count increment to max winners

* dont panic

* add test for bad data provider

* Update frame/staking/src/pallet/impls.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* fix namespace conflict and add test for onchain max winners less than desired targets

* defensive unwrap

* early convert to bounded vec

* fix syntax

* fmt

* fix doc

* fix rustdoc

* fmt

* fix maxwinner count for benchmarking

* add instant election for noelection

* fmt

* fix compile

* pr feedbacks

* always error at validator count exceeding max winners

* add useful error message

* pr comments

* import fix

* add checked_desired_targets

* fmt

* fmt

* fix rust doc

Co-authored-by: parity-processbot <>
Co-authored-by: kianenigma <kian@parity.io>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
This commit is contained in:
Ankan
2022-11-09 10:11:51 +01:00
committed by GitHub
parent 535c6f2e94
commit 657d99202c
21 changed files with 544 additions and 318 deletions
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substrate/frame/staking/src/mock.rs
+5 -1
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@@ -238,6 +238,7 @@ parameter_types! {
pub static MaxUnlockingChunks: u32 = 32;
pub static RewardOnUnbalanceWasCalled: bool = false;
pub static LedgerSlashPerEra: (BalanceOf<Test>, BTreeMap<EraIndex, BalanceOf<Test>>) = (Zero::zero(), BTreeMap::new());
pub static MaxWinners: u32 = 100;
}
type VoterBagsListInstance = pallet_bags_list::Instance1;
@@ -256,6 +257,9 @@ impl onchain::Config for OnChainSeqPhragmen {
type Solver = SequentialPhragmen<AccountId, Perbill>;
type DataProvider = Staking;
type WeightInfo = ();
type MaxWinners = MaxWinners;
type VotersBound = ConstU32<{ u32::MAX }>;
type TargetsBound = ConstU32<{ u32::MAX }>;
}
pub struct MockReward {}
@@ -295,7 +299,7 @@ impl crate::pallet::pallet::Config for Test {
type NextNewSession = Session;
type MaxNominatorRewardedPerValidator = ConstU32<64>;
type OffendingValidatorsThreshold = OffendingValidatorsThreshold;
type ElectionProvider = onchain::UnboundedExecution<OnChainSeqPhragmen>;
type ElectionProvider = onchain::OnChainExecution<OnChainSeqPhragmen>;
type GenesisElectionProvider = Self::ElectionProvider;
// NOTE: consider a macro and use `UseNominatorsAndValidatorsMap<Self>` as well.
type VoterList = VoterBagsList;