Type Definition darwinia_staking::pallet::HistoryDepth

pub type HistoryDepth<T> = StorageValue<_GeneratedPrefixForStorageHistoryDepth<T>, u32, ValueQuery, HistoryDepthOnEmpty>;

Number of eras to keep in history.

Information is kept for eras in [current_era - history_depth; current_era].

Must be more than the number of eras delayed by session otherwise. I.e. active era must always be in history. I.e. active_era > current_era - history_depth must be guaranteed.