Trait pallet_grandpa::HandleEquivocation

pub trait HandleEquivocation<T: Config> {
    type Offence: GrandpaOffence<T::KeyOwnerIdentification>;
    type ReportLongevity: Get<u64>;
    fn report_offence(
        reporters: Vec<T::AccountId>, 
        offence: Self::Offence
    ) -> Result<(), OffenceError>;
    fn is_known_offence(
        offenders: &[T::KeyOwnerIdentification], 
        time_slot: &<Self::Offence as Offence<T::KeyOwnerIdentification>>::TimeSlot
    ) -> bool;
    fn submit_unsigned_equivocation_report(
        equivocation_proof: EquivocationProof<T::Hash, T::BlockNumber>, 
        key_owner_proof: T::KeyOwnerProof
    ) -> DispatchResult;
    fn block_author() -> Option<T::AccountId>;
}

A trait with utility methods for handling equivocation reports in GRANDPA. The offence type is generic, and the trait provides , reporting an offence triggered by a valid equivocation report, and also for creating and submitting equivocation report extrinsics (useful only in offchain context).

Associated Types

type Offence: GrandpaOffence<T::KeyOwnerIdentification>

The offence type used for reporting offences on valid equivocation reports.

type ReportLongevity: Get<u64>

The longevity, in blocks, that the equivocation report is valid for. When using the staking pallet this should be equal to the bonding duration (in blocks, not eras).

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Required methods

fn report_offence(
    reporters: Vec<T::AccountId>,
    offence: Self::Offence
) -> Result<(), OffenceError>

Report an offence proved by the given reporters.

fn is_known_offence(
    offenders: &[T::KeyOwnerIdentification],
    time_slot: &<Self::Offence as Offence<T::KeyOwnerIdentification>>::TimeSlot
) -> bool

Returns true if all of the offenders at the given time slot have already been reported.

fn submit_unsigned_equivocation_report(
    equivocation_proof: EquivocationProof<T::Hash, T::BlockNumber>,
    key_owner_proof: T::KeyOwnerProof
) -> DispatchResult

Create and dispatch an equivocation report extrinsic.

fn block_author() -> Option<T::AccountId>

Fetch the current block author id, if defined.

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Implementations on Foreign Types

impl<T: Config> HandleEquivocation<T> for ()

type Offence = GrandpaEquivocationOffence<T::KeyOwnerIdentification>

type ReportLongevity = ()

fn report_offence(
    _reporters: Vec<T::AccountId>,
    _offence: GrandpaEquivocationOffence<T::KeyOwnerIdentification>
) -> Result<(), OffenceError>

fn is_known_offence(
    _offenders: &[T::KeyOwnerIdentification],
    _time_slot: &GrandpaTimeSlot
) -> bool

fn submit_unsigned_equivocation_report(
    _equivocation_proof: EquivocationProof<T::Hash, T::BlockNumber>,
    _key_owner_proof: T::KeyOwnerProof
) -> DispatchResult

fn block_author() -> Option<T::AccountId>

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Implementors

impl<T, R, L, O> HandleEquivocation<T> for EquivocationHandler<T::KeyOwnerIdentification, R, L, O> where
    T: Config + Config + SendTransactionTypes<Call<T>>,
    R: ReportOffence<T::AccountId, T::KeyOwnerIdentification, O>,
    L: Get<u64>,
    O: GrandpaOffence<T::KeyOwnerIdentification>, 

type Offence = O

type ReportLongevity = L

fn report_offence(
    reporters: Vec<T::AccountId>,
    offence: O
) -> Result<(), OffenceError>

fn is_known_offence(
    offenders: &[T::KeyOwnerIdentification],
    time_slot: &O::TimeSlot
) -> bool

fn submit_unsigned_equivocation_report(
    equivocation_proof: EquivocationProof<T::Hash, T::BlockNumber>,
    key_owner_proof: T::KeyOwnerProof
) -> DispatchResult

fn block_author() -> Option<T::AccountId>

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