Skip to content

Update EIP-7916: Merkleize to right #11032

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
eth-bot merged 1 commit into from
Jan 15, 2026
Merged

Update EIP-7916: Merkleize to right #11032

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
24 changes: 12 additions & 12 deletions EIPS/eip-7916.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -42,22 +42,22 @@ The [SSZ Merkleization specification](https://github.com/ethereum/consensus-spec
- The merkleization depends on the number of input chunks and is defined recursively:
- If `len(chunks) == 0`: the root is a zero value, `Bytes32()`.
- Otherwise: compute the root using `hash(a, b)`
- `a`: Recursively merkleize chunks beyond `num_leaves` using `merkleize_progressive(chunks[num_leaves:], num_leaves * 4)`.
- `b`: Merkleize the first up to `num_leaves` chunks as a binary tree using `merkleize(chunks[:num_leaves], num_leaves)`.
- `a`: Merkleize the first up to `num_leaves` chunks as a binary tree using `merkleize(chunks[:num_leaves], num_leaves)`.
- `b`: Recursively merkleize chunks beyond `num_leaves` using `merkleize_progressive(chunks[num_leaves:], num_leaves * 4)`.

This results in a 0-terminated sequence of binary subtrees with increasing leaf count. The deepest subtree is padded with zeroed chunks (virtually for memory efficiency).

```
root
/\
/ \
/\ 1: chunks[0 ..< 1]
/ \
/\ 4: chunks[1 ..< 5]
/ \
/\ 16: chunks[5 ..< 21]
/ \
0 64: chunks[21 ..< 85]
root
/\
/ \
1: chunks[0 ..< 1] /\
/ \
4: chunks[1 ..< 5] /\
/ \
16: chunks[5 ..< 21] /\
/ \
64: chunks[21 ..< 85] 0
```

| Depth | Added chunks | Total chunks | Total capacity (bytes) |
Expand Down