starknet_api: calculate block commitments in parallel

[nimrod-starkware]

No description provided.

[reviewable-StarkWare]

This change is 

[nimrod-starkware]

• starknet_api: calculate block commitments in parallel #10434 👈 (View in Graphite)
• main-v0.14.1-committer

This stack of pull requests is managed by Graphite. Learn more about stacking.

[github-actions]

Artifacts upload workflows:

• Started at 2025-11-26T13:30:35Z

[yoavGrs]

@yoavGrs reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dorimedini-starkware)

[dorimedini-starkware]

@dorimedini-starkware reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @nimrod-starkware)

---

a discussion (no related file):
can you open a py-side pr to make sure there is no runtime issue with computing block hash?

---

crates/starknet_api/src/block_hash/block_hash_calculator.rs line 231 at r1 (raw file):

    let (transaction_commitment, event_commitment, receipt_commitment, state_diff_commitment) =
        tokio::try_join!(transaction_task, event_task, receipt_task, state_diff_task)
            .expect("Failed to join block commitments tasks.");

why spawn_blocking and not spawn?

Code quote:

    // Spawn tasks for parallel execution
    let transaction_task = spawn_blocking(move || {
        calculate_transaction_commitment::<Poseidon>(&transaction_leaf_elements)
    });

    let event_task =
        spawn_blocking(move || calculate_event_commitment::<Poseidon>(&event_leaf_elements));

    let receipt_task =
        spawn_blocking(move || calculate_receipt_commitment::<Poseidon>(&receipt_elements));

    let state_diff_task = spawn_blocking(move || calculate_state_diff_hash(&state_diff));

    // Wait for all tasks to complete.
    let (transaction_commitment, event_commitment, receipt_commitment, state_diff_commitment) =
        tokio::try_join!(transaction_task, event_task, receipt_task, state_diff_task)
            .expect("Failed to join block commitments tasks.");

[nimrod-starkware]

Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @dorimedini-starkware)

---

a discussion (no related file):

Previously, dorimedini-starkware wrote…

can you open a py-side pr to make sure there is no runtime issue with computing block hash?

https://github.com/starkware-industries/starkware/pull/39579
Passed without any op, can i close?

[dorimedini-starkware]

Reviewable status: all files reviewed, 2 unresolved discussions (waiting on @nimrod-starkware)

---

a discussion (no related file):

Previously, nimrod-starkware wrote…

https://github.com/starkware-industries/starkware/pull/39579
Passed without any op, can i close?

yes

[nimrod-starkware]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @dorimedini-starkware)

---

crates/starknet_api/src/block_hash/block_hash_calculator.rs line 231 at r1 (raw file):

Previously, dorimedini-starkware wrote…

why spawn_blocking and not spawn?

Discussed offline

[dorimedini-starkware]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @nimrod-starkware)