Truncated Display impl for ExecutionBlockHash

[chong-he]

Issue Addressed

• Re-implement short format for block roots/hashes #6689

Proposed Changes

The intention is to only modify the INFO logs that's emitted regularly to reduce the verbosity. But I understand that this change will affect other display in the logs too that uses the ExecutionBlockHash display. So would love some feedbacks about the change.

Additional Info

Before:

Apr 08 10:42:17.000 INFO Synced peers: "30", exec_hash: "0x34b19d1c1e27a6da19e0cd1e399aa6be25e79844558a90ad725a3d7f7555a957 (unverified)", finalized_root: 0x7d486be7f3979e50952e45f3d55b52bb0467e7defad79aa3ad9443d8da092749, finalized_epoch: 439560, epoch: 439562, block: "0x8135c79dc63ec70bdf890b1040282ac8d12743d10a44858990d0024c2726189c", slot: 14066009

After:

Apr 08 11:17:17.000 INFO Synced peers: "37", exec_hash: "0xf9d6…4778 (unverified)", finalized_root: 0x2e01…5ff9, finalized_epoch: 439566, epoch: 439568, block: "0xf7c5…afee", slot: 14066184

[chong-he]

Moving this here because this is just under impl fmt::Debug for ExecutionBlockHash so I thought it would be cleaner this way

[macladson]

I like the idea of this PR and the new Display impl is good, but I think the implementation is a bit overzealous. I think this PR would be better as a targeted "truncated Display impl for ExecutionBlockHash" PR.

[chong-he]

If I understand you correctly, we keep others logs unchanged and just changed the impl for ExecutionBlockHash, so the final log looks like this:

Apr 09 16:58:29.000 INFO Synced peers: "19", exec_hash: "0x2388…9dde (unverified)", finalized_root: 0x65945b2482f5e1f42158a94c167d6a7fb727a55ddf4ec123f9ae2220c590d132, finalized_epoch: 439844, epoch: 439846, block: "0x22783cac5c0e8da4bac41a32f56aa4eacdc8d22b3d508001db05991e5df0d4c5", slot: 14075090

i.e., only the exec_hash is truncated, and not the block_root and finalized_root

head_root is of type FixedBytes<32>, which is from the external crate alloy-primitives.
finalized_root is of type Hash256, which is defined as: pub type Hash256 = alloy_primitives::B256 which is also from alloy-primitives.
So we keep these unchanged

[macladson]

Exactly, this looks good now!
Note that this is only a partial solution to #6689.
We need to come up with a solution which works for alloy_primitives::B256 but that should be a separate PR

[mergify]

Merge Queue Status

• ✅ Entered queue — 2026-04-09 11:31 UTC · Rule: default
• ✅ Checks passed · on draft merge queue: embarking unstable (7c2dcfc) and #9108 together #9117
• ✅ Merged — 2026-04-09 12:00 UTC · at c9fbab1bf68510bf0366d4225bf1b5b7c5dfb33e

This pull request spent 29 minutes 40 seconds in the queue, including 27 minutes 31 seconds running CI.

Required conditions to merge

• #approved-reviews-by >= 1 [🛡 GitHub branch protection]
  • Truncated Display impl for ExecutionBlockHash #9108
• #changes-requested-reviews-by = 0 [🛡 GitHub branch protection]
  • Truncated Display impl for ExecutionBlockHash #9108
• check-success=local-testnet-success
• check-success=test-suite-success