[−][src]Trait pallet_staking::Trait

pub trait Trait: Trait {
    type Currency: LockableCurrency<Self::AccountId, Moment = Self::BlockNumber>;
    type Time: Time;
    type CurrencyToVote: Convert<BalanceOf<Self>, u64> + Convert<u128, BalanceOf<Self>>;
    type RewardRemainder: OnUnbalanced<<Self::Currency as Currency<Self::AccountId>>::NegativeImbalance>;
    type Event: From<Event<Self>> + Into<Self::Event>;
    type Slash: OnUnbalanced<<Self::Currency as Currency<Self::AccountId>>::NegativeImbalance>;
    type Reward: OnUnbalanced<<Self::Currency as Currency<Self::AccountId>>::PositiveImbalance>;
    type SessionsPerEra: Get<SessionIndex>;
    type BondingDuration: Get<EraIndex>;
    type SlashDeferDuration: Get<EraIndex>;
    type SlashCancelOrigin: EnsureOrigin<Self::Origin>;
    type SessionInterface: SessionInterface<Self::AccountId>;
    type RewardCurve: Get<&'static PiecewiseLinear<'static>>;
    type MaxNominatorRewardedPerValidator: Get<u32>;
}

Associated Types

`type Currency: LockableCurrency<Self::AccountId, Moment = Self::BlockNumber>`

The staking balance.

`type Time: Time`

Time used for computing era duration.

It is guaranteed to start being called from the first on_finalize. Thus value at genesis is not used.

`type CurrencyToVote: Convert<BalanceOf<Self>, u64> + Convert<u128, BalanceOf<Self>>`

Convert a balance into a number used for election calculation. This must fit into a u64 but is allowed to be sensibly lossy. TODO: #1377 The backward convert should be removed as the new Phragmen API returns ratio. The post-processing needs it but will be moved to off-chain. TODO: #2908

`type RewardRemainder: OnUnbalanced<<Self::Currency as Currency<Self::AccountId>>::NegativeImbalance>`

Tokens have been minted and are unused for validator-reward.

`type Event: From<Event<Self>> + Into<Self::Event>`

The overarching event type.

`type Slash: OnUnbalanced<<Self::Currency as Currency<Self::AccountId>>::NegativeImbalance>`

Handler for the unbalanced reduction when slashing a staker.

`type Reward: OnUnbalanced<<Self::Currency as Currency<Self::AccountId>>::PositiveImbalance>`

Handler for the unbalanced increment when rewarding a staker.

`type SessionsPerEra: Get<SessionIndex>`

Number of sessions per era.

`type BondingDuration: Get<EraIndex>`

Number of eras that staked funds must remain bonded for.

`type SlashDeferDuration: Get<EraIndex>`

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.

`type SlashCancelOrigin: EnsureOrigin<Self::Origin>`

The origin which can cancel a deferred slash. Root can always do this.

`type SessionInterface: SessionInterface<Self::AccountId>`

Interface for interacting with a session module.

`type RewardCurve: Get<&'static PiecewiseLinear<'static>>`

The NPoS reward curve to use.

`type MaxNominatorRewardedPerValidator: Get<u32>`

The maximum number of nominator 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.

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Implementors

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