Trait finality_grandpa::Chain

pub trait Chain<H: Eq, N: Copy + BlockNumberOps> {
    fn ancestry(&self, base: H, block: H) -> Result<Vec<H>, Error>;
    fn best_chain_containing(&self, base: H) -> Option<(H, N)>;

    fn is_equal_or_descendent_of(&self, base: H, block: H) -> bool { ... }
}

Chain context necessary for implementation of the finality gadget.

Required methods

fn ancestry(&self, base: H, block: H) -> Result<Vec<H>, Error>

Get the ancestry of a block up to but not including the base hash. Should be in reverse order from block's parent.

If the block is not a descendent of base, returns an error.

fn best_chain_containing(&self, base: H) -> Option<(H, N)>

Return the hash of the best block whose chain contains the given block hash, even if that block is base itself.

If base is unknown, return None.

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Provided methods

fn is_equal_or_descendent_of(&self, base: H, block: H) -> bool

Returns true if block is a descendent of or equal to the given base.

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Implementors

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