lighthouse/eth2/utils/tree_hash/src/lib.rs

pub mod cached_tree_hash;
pub mod signed_root;
pub mod standard_tree_hash;

pub const BYTES_PER_CHUNK: usize = 32;
pub const HASHSIZE: usize = 32;
pub const MERKLE_HASH_CHUNCK: usize = 2 * BYTES_PER_CHUNK;

pub use cached_tree_hash::{BTreeOverlay, CachedTreeHashSubTree, Error, TreeHashCache};
pub use signed_root::SignedRoot;
pub use standard_tree_hash::{efficient_merkleize, TreeHash};

#[derive(Debug, PartialEq, Clone)]
pub enum TreeHashType {
    Basic,
    List,
    Composite,
}

fn num_sanitized_leaves(num_bytes: usize) -> usize {
    let leaves = (num_bytes + HASHSIZE - 1) / HASHSIZE;
    leaves.next_power_of_two()
}

fn num_nodes(num_leaves: usize) -> usize {
    2 * num_leaves - 1
}