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Companion for bags-list iter-from interface (#5209)

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* companion for bags-list iter-from

* remove unused

* update lockfile for {"substrate"}

* fix CI

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Co-authored-by: parity-processbot <>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
This commit is contained in:
Kian Paimani
2022-03-31 18:28:50 +01:00
committed by GitHub
parent b04a2d2b54
commit 5900c50c7b
2 changed files with 165 additions and 217 deletions
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polkadot/Cargo.lock
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+163 -163
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polkadot/runtime/common/src/elections.rs
+2 -54
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@@ -18,9 +18,9 @@
use frame_election_provider_support::{
onchain::{ExecutionConfig, UnboundedExecution},
ElectionDataProvider, SequentialPhragmen, SortedListProvider,
ElectionDataProvider, SequentialPhragmen,
};
use sp_std::{boxed::Box, marker::PhantomData};
use sp_std::marker::PhantomData;
/// Implements the weight types for the elections module and a specific
/// runtime.
@@ -81,55 +81,3 @@ impl<
/// The election provider of the genesis
pub type GenesisElectionOf<T, S> = UnboundedExecution<OnChainSeqPhragmen<T, S>>;
/// Implementation of `frame_election_provider_support::SortedListProvider` that updates the
/// bags-list but uses [`pallet_staking::Nominators`] for `iter`. This is meant to be a transitionary
/// implementation for runtimes to "test" out the bags-list by keeping it up to date, but not yet
/// using it for snapshot generation. In contrast, a "complete" implementation would use bags-list
/// for `iter`.
pub struct UseNominatorsAndUpdateBagsList<T>(PhantomData<T>);
impl<T: pallet_bags_list::Config + pallet_staking::Config> SortedListProvider<T::AccountId>
for UseNominatorsAndUpdateBagsList<T>
{
type Error = pallet_bags_list::ListError;
type Score = <T as pallet_bags_list::Config>::Score;
fn iter() -> Box<dyn Iterator<Item = T::AccountId>> {
Box::new(pallet_staking::Nominators::<T>::iter().map(|(n, _)| n))
}
fn count() -> u32 {
pallet_bags_list::Pallet::<T>::count()
}
fn contains(id: &T::AccountId) -> bool {
pallet_bags_list::Pallet::<T>::contains(id)
}
fn on_insert(id: T::AccountId, weight: Self::Score) -> Result<(), Self::Error> {
pallet_bags_list::Pallet::<T>::on_insert(id, weight)
}
fn on_update(id: &T::AccountId, new_weight: Self::Score) {
pallet_bags_list::Pallet::<T>::on_update(id, new_weight);
}
fn on_remove(id: &T::AccountId) {
pallet_bags_list::Pallet::<T>::on_remove(id);
}
fn unsafe_regenerate(
all: impl IntoIterator<Item = T::AccountId>,
weight_of: Box<dyn Fn(&T::AccountId) -> Self::Score>,
) -> u32 {
pallet_bags_list::Pallet::<T>::unsafe_regenerate(all, weight_of)
}
fn sanity_check() -> Result<(), &'static str> {
pallet_bags_list::Pallet::<T>::sanity_check()
}
fn unsafe_clear() {
pallet_bags_list::Pallet::<T>::unsafe_clear()
}
}