Add Gloas bid selection, block production, and bid gossip processing (Gloas builder API 3/5) by ethDreamer · Pull Request #9805 · sigp/lighthouse

ethDreamer · 2026-08-13T20:15:06Z

Third PR of the Gloas builder API stack:

beacon_chain: direct builder bid verification (spawned on the blocking
executor), gossip-bid refinements, wei-domain bid selection
(BidCandidate/BidSource), and Gloas block production that assembles
local, gossip, and direct-builder candidates
network: process payload-bid and proposer-preference gossip, including the
new PayloadBidError variants
client: construct the Builders service when the Gloas fork is scheduled
and wire it into the beacon chain

The HTTP API still serves GET produceBlockV4 at this point; the POST
conversion and the Eth-Builder-Url round-trip land in the next PR.

ethDreamer · 2026-08-13T20:15:12Z

This pull request is part of a Mergify stack:

#	Pull Request	Link
1	Add Gloas bid selection, block production, and bid gossip processing (Gloas builder API 3/5)	#9805	👈
2	Convert produceBlockV4 to POST and round-trip Eth-Builder-Url (Gloas builder API 4/5)	#9806
3	Migrate the validator client to the Gloas builder API (Gloas builder API 5/5)	#9807

ethDreamer · 2026-08-13T23:39:06Z

Revision history

#	Type	Changes	Reason	Date
1	initial	`cfe5775`		2026-08-13 23:38 UTC
2	content	`cfe5775 → ea4ef14`	catch up to Aug 10 spec revisions: builder_pubkeys membership check in direct bid verification; fork_name in BidRequestContext	2026-08-13 23:38 UTC
3	rebase	`ea4ef14 → 46ee0fa` (rebase only)		2026-08-14 00:03 UTC
4	rebase	`46ee0fa → 1ad80bd` (rebase only)		2026-08-14 18:25 UTC
5	rebase	`1ad80bd → 9b3cb1f` (rebase only)		2026-08-17 16:52 UTC
6	rebase	`9b3cb1f → e71bb39` (rebase only)		2026-08-18 17:51 UTC
7	content	`e71bb39 → c3501ac`	rebase on unstable: merged #9763 multiple-bids-per-head-view cache rework with the single-lock observe_bid refactor (BidParent keying, per-parent seen tracking preserved)	2026-08-19 19:31 UTC
8	rebase	`c3501ac → f95e1b9` (rebase only)		2026-08-19 21:57 UTC
9	rebase	`f95e1b9 → bd0b326` (rebase only)		2026-08-20 17:50 UTC
10	rebase	`bd0b326 → 12a2374` (rebase only)		2026-08-20 21:41 UTC
11	rebase	`12a2374 → 332a33e` (rebase only)		2026-08-20 23:35 UTC
12	rebase	`332a33e → db7f733` (rebase only)		2026-08-21 14:14 UTC
13	rebase	`db7f733 → 1ab6945` (rebase only)		2026-08-24 18:03 UTC
14	rebase	`1ab6945 → 441777c` (rebase only)		2026-08-25 17:47 UTC
15	content	`441777c → eb37595`	rebase on unstable: adapt #9920's new prepare_payload test call to the BuilderConfig production signature	2026-08-26 19:20 UTC
16	content	`eb37595 → c73f272`	rebase over #9905 (ObservedExecutionPayloads gas-limit machinery). Patch delta is conflict resolution only, no review content: upstream's new verify_builder unified with verify_bid_state_conditions (…	2026-09-01 17:18 UTC
17	content	`c73f272 → 80ae5be`	review response (content only, base unchanged): direct-bid gas limit now uses the ObservedExecutionPayloads baseline at the selected parent (reusing #9905; correct after an empty parent), with tests;…	2026-09-01 18:32 UTC
18	rebase	`80ae5be → 0ca4808` (rebase only)		2026-09-02 15:53 UTC
19	content	`0ca4808 → cc73f1b`	review response (content only, base unchanged): rename the selected parent-payload hash to executed_ancestor_hash through the bid plumbing (wire names kept at spec boundaries), exact wei-domain trust…	2026-09-02 17:59 UTC
20	rebase	`cc73f1b → 6dafd2b` (rebase only)		2026-09-03 21:03 UTC
21	content	`6dafd2b → 74a86e2`	rebase over #9970 (block_hash != parent_block_hash gossip REJECT). Patch delta is conflict resolution only: the new check kept at upstream's placement inside the payment/blobs gossip helper our refac…	2026-09-03 22:40 UTC

mergify · 2026-08-29T19:06:32Z

This pull request has merge conflicts. Could you please resolve them @ethDreamer? 🙏

michaelsproul · 2026-08-31T05:00:54Z

+            // eligibility or coverage can go stale before production. Re-check against the production
+            // state and drop it if it would now fail `per_block_processing`, so a stale gossip bid
+            // can't outrank a viable candidate and sink the whole proposal.
+            match verify_bid_state_conditions(&gossip_bid.message, state, &self.spec) {


I believe this validation is still too weak. An exit in the parent payload can cause the builder to become inactive, in which case their bid is invalid.

I've opened an issue on the spec to ensure this gets added to the honest validator guide. We could definitely consider merging in the meantime.

Gloas: initially valid bids can be made invalid by application of the parent payload ethereum/consensus-specs#5583

In terms of a fix, we could apply the execution payload to the state early (seems simple), or try to infer the effect of the requests (like we do for voluntary exits).

I think this is handled in the spec update that would prevent the bid from getting considered at all.

jimmygchen · 2026-08-31T06:04:08Z

+    fn rank_key(&self) -> (bool, bool, Uint256, bool) {
+        (
+            self.overrides_builder(),
+            self.meets_min_bid(),


This fallback makes sense to avoid missing the block, but min_bid is currently documented as the minimum payment accepted for p2p bids and accepted from a direct builder. Should we document it as a preference rather than a hard minimum?

jimmygchen · 2026-08-31T06:04:08Z

+/// post-state advanced to `proposal_slot` — and `parent_block_hash` / `parent_block_root` the
+/// FULL/EMPTY parent the producer selected.
+#[allow(clippy::too_many_arguments)]
+pub fn verify_direct_bid<E: EthSpec>(


max_execution_payment currently only caps the value used for ranking, so a bid can still be accepted with a larger execution payment. Should we reject it during validation as required by the builder spec?

I explicitly opted for these departures from the spec. I actually thought they had changed it but perhaps not..
https://discord.com/channels/595666850260713488/1539632415641964584/1540123275978342534

I saw this too and actually like Mark's version better. Happy to consider the spec compliant change in a later PR, but gonna merge this one to unblock other stuff now.

pawanjay176 · 2026-09-03T21:39:19Z

Let's get this in!
@mergify queue

pawanjay176 · 2026-09-03T21:39:45Z

@mergify queue

mergify · 2026-09-03T21:40:10Z

Merge Queue Status

✅ Entered queue — 2026-09-03 21:40 UTC · Rule: default · triggered by @pawanjay176 with the @mergifyio queue command
🚫 Left the queue — 2026-09-03 22:10 UTC · at 6dafd2b4565cdde6471c20c321429dddbd65cf65

This pull request spent 30 minutes 51 seconds in the queue, with no time running CI.

Reason

The pull request conflicts with the base branch

The pull request was held in the queue, conflicting with 1 pull request ahead of it. The conflict became a base branch one after #9970 merged.

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You should update or rebase your pull request.

If you want to requeue this pull request, you can post a @mergifyio queue comment.

Requeued — the merge queue status continues in this comment ↓.

…(Gloas builder API 3/5) Third PR of the Gloas builder API stack: - beacon_chain: direct builder bid verification (spawned on the blocking executor), gossip-bid refinements, wei-domain bid selection (`BidCandidate`/`BidSource`), and Gloas block production that assembles local, gossip, and direct-builder candidates - network: process payload-bid and proposer-preference gossip, including the new `PayloadBidError` variants - client: construct the `Builders` service when the Gloas fork is scheduled and wire it into the beacon chain The HTTP API still serves `GET` produceBlockV4 at this point; the `POST` conversion and the `Eth-Builder-Url` round-trip land in the next PR. Change-Id: Ieccaee5db81bf871c19cef1b79fc48283be9dd51

pawanjay176

LGTM. Lets merge 🚀

pawanjay176 · 2026-09-03T22:55:19Z

@mergify queue

mergify · 2026-09-03T22:55:53Z

Merge Queue Status

✅ Entered queue — 2026-09-03 22:55 UTC · Rule: default · triggered by @pawanjay176 with the @mergifyio queue command
✅ Checks passed · on draft merge queue: checking #9805 on unstable (34b00eb) #9974
✅ Merged — 2026-09-03 23:26 UTC · at 115bd16fb565c3df2b169a740fa5754adde00762 · squash

This pull request spent 30 minutes 54 seconds in the queue, including 28 minutes 47 seconds running CI.

Required conditions to merge

check-success=local-testnet-success
check-success=test-suite-success
github-review-approved [🛡 GitHub branch protection]
- Add Gloas bid selection, block production, and bid gossip processing (Gloas builder API 3/5) #9805

ethDreamer requested a review from jxs as a code owner August 13, 2026 20:15

This was referenced Aug 13, 2026

Convert produceBlockV4 to POST and round-trip Eth-Builder-Url (Gloas builder API 4/5) #9806

Merged

Add builder API types, request-auth domain, and eth2 client methods (Gloas builder API 1/5) #9803

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ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from cfe5775 to ea4ef14 Compare August 13, 2026 23:39

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from ea4ef14 to 46ee0fa Compare August 14, 2026 00:03

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch 2 times, most recently from 1ad80bd to 9b3cb1f Compare August 17, 2026 16:52

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from 9b3cb1f to e71bb39 Compare August 18, 2026 17:51

eserilev mentioned this pull request Aug 19, 2026

glamsterdam-devnet-8 #9881

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ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from e71bb39 to c3501ac Compare August 19, 2026 19:31

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from c3501ac to f95e1b9 Compare August 19, 2026 21:58

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from f95e1b9 to bd0b326 Compare August 20, 2026 17:50

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from bd0b326 to 12a2374 Compare August 20, 2026 21:41

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from 12a2374 to 332a33e Compare August 20, 2026 23:35

Base automatically changed from stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f to unstable August 21, 2026 00:18

mergify Bot added waiting-on-author The reviewer has suggested changes and awaits thier implementation. and removed ready-for-review The code is ready for review labels Aug 29, 2026

michaelsproul mentioned this pull request Aug 31, 2026

Gloas gossip handlers #9924

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michaelsproul reviewed Aug 31, 2026

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jimmygchen reviewed Aug 31, 2026

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Comment thread beacon_node/beacon_chain/src/block_production/bid_selection.rs Outdated

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ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-bid-selection-block-prod-bid-gossip--eccaee5d branch from 6dafd2b to 74a86e2 Compare September 3, 2026 22:40

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merge queue: checking #9805 on unstable (34b00eb) #9974

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ethDreamer mentioned this pull request Sep 8, 2026

Gloas builder API review follow-ups: direct-bid hash check and no-redirect block forwarding #10012

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