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staking: only disable slashed validators and keep them disabled for whole era (#9448)

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* session: remove disabled validators threshold logic

* staking: add logic to track offending validators

* staking: disable validators for the whole era

* frame: fix tests

* staking: add tests for disabling validators handling

* staking: fix adding offending validator when already slashed in era

* address review comments

* session, staking: add comments about sorted vecs

Co-authored-by: Andronik Ordian <write@reusable.software>
This commit is contained in:
André Silva
2021-10-06 17:22:34 +01:00
committed by GitHub
parent 12e9e7ceb3
commit 7e5c022aea
25 changed files with 282 additions and 134 deletions
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substrate/frame/staking/src/lib.rs
+5 -8
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@@ -619,12 +619,9 @@ pub struct UnappliedSlash<AccountId, Balance: HasCompact> {
///
/// This is needed because `Staking` sets the `ValidatorIdOf` of the `pallet_session::Config`
pub trait SessionInterface<AccountId>: frame_system::Config {
/// Disable a given validator by stash ID.
///
/// Returns `true` if new era should be forced at the end of this session.
/// This allows preventing a situation where there is too many validators
/// disabled and block production stalls.
fn disable_validator(validator: &AccountId) -> Result<bool, ()>;
/// Disable the validator at the given index, returns `false` if the validator was already
/// disabled or the index is out of bounds.
fn disable_validator(validator_index: u32) -> bool;
/// Get the validators from session.
fn validators() -> Vec<AccountId>;
/// Prune historical session tries up to but not including the given index.
@@ -645,8 +642,8 @@ where
Option<<T as frame_system::Config>::AccountId>,
>,
{
fn disable_validator(validator: &<T as frame_system::Config>::AccountId) -> Result<bool, ()> {
<pallet_session::Pallet<T>>::disable(validator)
fn disable_validator(validator_index: u32) -> bool {
<pallet_session::Pallet<T>>::disable_index(validator_index)
}
fn validators() -> Vec<<T as frame_system::Config>::AccountId> {