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Offline/Slashing improvements (#1665)

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* Initial logic

* Fix tests

* Don't punish at all when everyone skipped

* Typo

* Fix tests.

* Update srml/aura/src/lib.rs

Co-Authored-By: gavofyork <github@gavwood.com>

* Simplification.

* Bump runtime verions
This commit is contained in:
Gav Wood
2019-02-05 22:11:40 +01:00
committed by GitHub
parent 471b7431bc
commit 0eeef28382
6 changed files with 46 additions and 31 deletions
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substrate/srml/staking/src/lib.rs
+19 -1
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@@ -57,6 +57,7 @@ mod mock;
mod tests;
const RECENT_OFFLINE_COUNT: usize = 32;
const DEFAULT_MINIMUM_VALIDATOR_COUNT: u32 = 4;
#[derive(PartialEq, Clone)]
@@ -295,6 +296,9 @@ decl_storage! {
/// We are forcing a new era.
pub ForcingNewEra get(forcing_new_era): Option<()>;
/// Most recent `RECENT_OFFLINE_COUNT` instances. (who it was, when it was reported, how many instances they were offline for).
pub RecentlyOffline get(recently_offline): Vec<(T::AccountId, T::BlockNumber, u32)>;
}
}
@@ -510,9 +514,23 @@ impl<T: Trait> Module<T> {
let slash_count = Self::slash_count(&v);
let new_slash_count = slash_count + count as u32;
<SlashCount<T>>::insert(v.clone(), new_slash_count);
<SlashCount<T>>::insert(&v, new_slash_count);
let grace = Self::offline_slash_grace();
if RECENT_OFFLINE_COUNT > 0 {
let item = (v.clone(), <system::Module<T>>::block_number(), count as u32);
<RecentlyOffline<T>>::mutate(|v| if v.len() >= RECENT_OFFLINE_COUNT {
let index = v.iter()
.enumerate()
.min_by_key(|(_, (_, block, _))| block)
.expect("v is non-empty; qed")
.0;
v[index] = item;
} else {
v.push(item);
});
}
let event = if new_slash_count > grace {
let slash = {
let base_slash = Self::current_offline_slash();