Trait pallet_authorship::FilterUncle

pub trait FilterUncle<Header, Author> {
    type Accumulator: Default;
    fn filter_uncle(
        header: &Header, 
        acc: &mut Self::Accumulator
    ) -> Result<Option<Author>, &'static str>;
}

Additional filtering on uncles that pass preliminary ancestry checks.

This should do work such as checking seals

Associated Types

type Accumulator: Default

An accumulator of data about uncles included.

In practice, this is used to validate uncles against others in the same block.

Required methods

fn filter_uncle(
    header: &Header,
    acc: &mut Self::Accumulator
) -> Result<Option<Author>, &'static str>

Do additional filtering on a seal-checked uncle block, with the accumulated filter.

Implementations on Foreign Types

impl<H, A> FilterUncle<H, A> for ()

type Accumulator = ()

fn filter_uncle(
    _: &H,
    _acc: &mut Self::Accumulator
) -> Result<Option<A>, &'static str>

Implementors

impl<Header, Author, T> FilterUncle<Header, Author> for OnePerAuthorPerHeight<T, Header::Number> where
    Header: HeaderT + PartialEq,
    Header::Number: Ord,
    Author: Clone + PartialEq + Ord,
    T: VerifySeal<Header, Author>, 

type Accumulator = BTreeSet<(Header::Number, Author)>

impl<Header, Author, T: VerifySeal<Header, Author>> FilterUncle<Header, Author> for SealVerify<T>

type Accumulator = ()