Function sparse_merkle_tree::merge::merge

pub fn merge<H: Hasher + Default>(
    height: u8,
    node_key: &H256,
    lhs: &MergeValue,
    rhs: &MergeValue
) -> MergeValue

Merge two hash with node information this function optimized for ZERO_HASH if lhs and rhs both are ZERO_HASH return ZERO_HASH, otherwise hash all info.