Module merkle 

SSZ merkleization primitives.

All hashes are 32-byte digests, threaded through the [digest::Digest] trait with OutputSize = U32. No domain bytes or prefixes are mixed in at the node level — concatenation is the only operation.

Functions

ceil_log2

Returns ceil(log2(max(1, n))).

hash_pair

Hash two 32-byte children into their parent node.

merkleize

SSZ merkleize — pad chunks to max(limit, chunks.len()) rounded up to the next power of two, build a balanced binary tree using hash(left || right), and return the root.

mix_in_length

mix_in_length(root, len) = hash(root || u256_le(len)).

mix_in_selector

mix_in_selector(root, sel) = hash(root || u256_le(sel)).

pack_bytes

Pack a byte slice into 32-byte chunks, zero-padding the tail.

zero_hash

Compute zero_hash(depth), where zero_hash(d) = hash(zero_hash(d-1), zero_hash(d-1)) and zero_hash(0) == [0u8; 32]. Recomputed per call (not memoized).