Trait finality_grandpa::Chain

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

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.

Implementors