[−][src]Trait pallet_session::Trait

pub trait Trait: Trait {
    type Event: From<Event> + Into<Self::Event>;
    type ValidatorId: Member + Parameter;
    type ValidatorIdOf: Convert<Self::AccountId, Option<Self::ValidatorId>>;
    type ShouldEndSession: ShouldEndSession<Self::BlockNumber>;
    type NextSessionRotation: EstimateNextSessionRotation<Self::BlockNumber>;
    type SessionManager: SessionManager<Self::ValidatorId>;
    type SessionHandler: SessionHandler<Self::ValidatorId>;
    type Keys: OpaqueKeys + Member + Parameter + Default;
    type DisabledValidatorsThreshold: Get<Perbill>;
    type WeightInfo: WeightInfo;
}

Associated Types

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

The overarching event type.

`type ValidatorId: Member + Parameter`

A stable ID for a validator.

`type ValidatorIdOf: Convert<Self::AccountId, Option<Self::ValidatorId>>`

A conversion from account ID to validator ID.

Its cost must be at most one storage read.

`type ShouldEndSession: ShouldEndSession<Self::BlockNumber>`

Indicator for when to end the session.

`type NextSessionRotation: EstimateNextSessionRotation<Self::BlockNumber>`

Something that can predict the next session rotation. This should typically come from the same logical unit that provides ShouldEndSession, yet, it gives a best effort estimate. It is helpful to implement EstimateNextNewSession.

`type SessionManager: SessionManager<Self::ValidatorId>`

Handler for managing new session.

`type SessionHandler: SessionHandler<Self::ValidatorId>`

Handler when a session has changed.

`type Keys: OpaqueKeys + Member + Parameter + Default`

The keys.

`type DisabledValidatorsThreshold: Get<Perbill>`

The fraction of validators set that is safe to be disabled.

After the threshold is reached disabled method starts to return true, which in combination with pallet_staking forces a new era.

`type WeightInfo: WeightInfo`

Weight information for extrinsics in this pallet.

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Implementors

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