Struct substrate_gen::runtime::staking::constants::ConstantsApi

impl ConstantsApi

pub fn max_nominations(&self) -> StaticConstantAddress<DecodeStaticType<u32>>

Maximum number of nominations per nominator.

pub fn history_depth(&self) -> StaticConstantAddress<DecodeStaticType<u32>>

Number of eras to keep in history.

Following information is kept for eras in [current_era - HistoryDepth, current_era]: ErasStakers, ErasStakersClipped, ErasValidatorPrefs, ErasValidatorReward, ErasRewardPoints, ErasTotalStake, ErasStartSessionIndex, StakingLedger.claimed_rewards.

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

If migrating an existing pallet from storage value to config value, this should be set to same value or greater as in storage.

Note: HistoryDepth is used as the upper bound for the BoundedVec item StakingLedger.claimed_rewards. Setting this value lower than the existing value can lead to inconsistencies in the StakingLedger and will need to be handled properly in a migration. The test reducing_history_depth_abrupt shows this effect.

pub fn sessions_per_era(&self) -> StaticConstantAddress<DecodeStaticType<u32>>

Number of sessions per era.

pub fn bonding_duration(&self) -> StaticConstantAddress<DecodeStaticType<u32>>

Number of eras that staked funds must remain bonded for.

pub fn slash_defer_duration( &self ) -> StaticConstantAddress<DecodeStaticType<u32>>

Number of eras that slashes are deferred by, after computation.

This should be less than the bonding duration. Set to 0 if slashes should be applied immediately, without opportunity for intervention.

pub fn max_nominator_rewarded_per_validator( &self ) -> StaticConstantAddress<DecodeStaticType<u32>>

The maximum number of nominators rewarded for each validator.

For each validator only the $MaxNominatorRewardedPerValidator biggest stakers can claim their reward. This used to limit the i/o cost for the nominator payout.

pub fn max_unlocking_chunks( &self ) -> StaticConstantAddress<DecodeStaticType<u32>>

The maximum number of unlocking chunks a [StakingLedger] can have. Effectively determines how many unique eras a staker may be unbonding in.

Note: MaxUnlockingChunks is used as the upper bound for the BoundedVec item StakingLedger.unlocking. Setting this value lower than the existing value can lead to inconsistencies in the StakingLedger and will need to be handled properly in a runtime migration. The test reducing_max_unlocking_chunks_abrupt shows this effect.

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