Trait sc_consensus_pow::PowAlgorithm

pub trait PowAlgorithm<B: BlockT> {
    type Difficulty: TotalDifficulty + Default + Encode + Decode + Ord + Clone + Copy;
    fn difficulty(
        &self, 
        parent: &BlockId<B>
    ) -> Result<Self::Difficulty, Error<B>>;
    fn verify(
        &self, 
        parent: &BlockId<B>, 
        pre_hash: &B::Hash, 
        seal: &Seal, 
        difficulty: Self::Difficulty
    ) -> Result<bool, Error<B>>;
    fn mine(
        &self, 
        parent: &BlockId<B>, 
        pre_hash: &B::Hash, 
        difficulty: Self::Difficulty, 
        round: u32
    ) -> Result<Option<Seal>, Error<B>>;

    fn preliminary_verify(
        &self, 
        _pre_hash: &B::Hash, 
        _seal: &Seal
    ) -> Result<Option<bool>, Error<B>> { ... }
}

Algorithm used for proof of work.

Associated Types

type Difficulty: TotalDifficulty + Default + Encode + Decode + Ord + Clone + Copy

Difficulty for the algorithm.

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Required methods

fn difficulty(&self, parent: &BlockId<B>) -> Result<Self::Difficulty, Error<B>>

Get the next block's difficulty.

This function will be called twice during the import process, so the implementation should be properly cached.

fn verify(
    &self,
    parent: &BlockId<B>,
    pre_hash: &B::Hash,
    seal: &Seal,
    difficulty: Self::Difficulty
) -> Result<bool, Error<B>>

Verify that the difficulty is valid against given seal.

fn mine(
    &self,
    parent: &BlockId<B>,
    pre_hash: &B::Hash,
    difficulty: Self::Difficulty,
    round: u32
) -> Result<Option<Seal>, Error<B>>

Mine a seal that satisfies the given difficulty.

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Provided methods

fn preliminary_verify(
    &self,
    _pre_hash: &B::Hash,
    _seal: &Seal
) -> Result<Option<bool>, Error<B>>

Verify that the seal is valid against given pre hash when parent block is not yet imported.

None means that preliminary verify is not available for this algorithm.

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Implementors

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