Add Gloas Builder API client and adapt execution layer (Gloas builder API 2/5) by ethDreamer · Pull Request #9804 · sigp/lighthouse

ethDreamer · 2026-08-13T20:15:05Z

Second PR of the Gloas builder API stack (builder-specs #165):

builder_client: relocate the legacy MEV-boost client to
PreGloasBuilderHttpClient and add the Gloas Builder API HTTP client
(request-auth, bid requests, preference submission, signed-block forwarding)
plus the stateless Builders service used by block production
execution_layer: adopt the relocated pre-Gloas client and drop dead error
variants

The new client is not yet wired into the beacon chain; that lands in the next
PR of this stack.

ethDreamer · 2026-08-13T20:15:11Z

This pull request is part of a Mergify stack:

#	Pull Request	Link
1	Add Gloas Builder API client and adapt execution layer (Gloas builder API 2/5)	#9804	👈
2	Add Gloas bid selection, block production, and bid gossip processing (Gloas builder API 3/5)	#9805
3	Convert produceBlockV4 to POST and round-trip Eth-Builder-Url (Gloas builder API 4/5)	#9806
4	Migrate the validator client to the Gloas builder API (Gloas builder API 5/5)	#9807

ethDreamer · 2026-08-13T23:39:05Z

Revision history

#	Type	Changes	Reason	Date
1	initial	`9274899`		2026-08-13 23:38 UTC
2	content	`9274899 → d1cbba9`	catch up to Aug 10 builder-specs #165: send Eth-Consensus-Version on bid requests and preference submissions (both now fork-versioned); builder_pubkeys threading	2026-08-13 23:38 UTC
3	rebase	`d1cbba9 → 490d128` (rebase only)		2026-08-14 00:03 UTC
4	rebase	`490d128 → 482984b` (rebase only)		2026-08-14 18:25 UTC
5	rebase	`482984b → 0ca9777` (rebase only)		2026-08-17 16:52 UTC
6	rebase	`0ca9777 → 510e3a2` (rebase only)		2026-08-18 17:51 UTC
7	rebase	`510e3a2 → 06b84f3` (rebase only)		2026-08-19 19:31 UTC
8	rebase	`06b84f3 → 2d74338` (rebase only)		2026-08-19 21:57 UTC
9	rebase	`2d74338 → 120d9ca` (rebase only)		2026-08-20 17:50 UTC
10	content	`120d9ca → c0283d0`	review response: move DEFAULT_TIMEOUT_MILLIS into the pre-Gloas client (its only consumer); add header-assertion tests for bid requests (consensus version, timing headers, accept/ssz toggle) and pref…	2026-08-20 21:41 UTC
11	rebase	`c0283d0 → ee05f36` (rebase only)		2026-08-20 23:35 UTC

pawanjay176

Very neat. This was a joy to review.
Just a few notes, nothing blocking merge

pawanjay176 · 2026-08-19T17:51:14Z

+            .create();
+        assert!(request_bid(&server).await.is_none());
+    }
+}


Can we also add a test for checking headers are as expected?

pawanjay176 · 2026-08-19T18:07:57Z

+    /// is likewise a proposer policy applied by the caller (see `DirectBid::min_bid`), not here. These
+    /// pipelines run
+    /// **concurrently across builders**, so a slow builder or an expensive validation for one bid
+    /// does not hold up the others. A failure, timeout, empty (204) response, or validation error


Nice, just noting that the timeout doesn't apply to the validation. So we need to make sure that validation takes predictable amount of time regardless of the content of the bid.
Probably handled in the next PR, but just flagging here in case.

pawanjay176

Nice, lets try to get 1 and 2 in

pawanjay176 · 2026-08-20T22:37:09Z

@mergify queue

mergify · 2026-08-20T22:37:27Z

Merge Queue Status

✅ Entered queue — 2026-08-20 22:38 UTC · Rule: default · triggered by @pawanjay176 with the @mergifyio queue command
🟠 Checks running · on draft merge queue: checking unstable (6e1fae3) and [#9803 + #9804] together #9901
🚫 Left the queue — 2026-08-20 23:14 UTC · at c0283d0325172ef3fa056291bd890428bbc3fe4b

This pull request spent 36 minutes 9 seconds in the queue, including 29 minutes 9 seconds running CI.

Required conditions to merge

check-success=local-testnet-success
check-success=test-suite-success
depends-on = sigp/lighthouse#9803 [⛓️ Add builder API types, request-auth domain, and eth2 client methods (Gloas builder API 1/5) #9803]
- Add Gloas Builder API client and adapt execution layer (Gloas builder API 2/5) #9804
github-review-approved [🛡 GitHub branch protection]
- Add Gloas Builder API client and adapt execution layer (Gloas builder API 2/5) #9804

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

… API 2/5) Second PR of the Gloas builder API stack (builder-specs #165): - builder_client: relocate the legacy MEV-boost client to `PreGloasBuilderHttpClient` and add the Gloas Builder API HTTP client (request-auth, bid requests, preference submission, signed-block forwarding) plus the stateless `Builders` service used by block production - execution_layer: adopt the relocated pre-Gloas client and drop dead error variants The new client is not yet wired into the beacon chain; that lands in the next PR of this stack. Change-Id: I5bcab56ff499b183f26cc90697bc7c7f2baddfe7

pawanjay176 · 2026-08-20T23:41:37Z

@mergify queue

mergify · 2026-08-20T23:42:04Z

Merge Queue Status

✅ Entered queue — 2026-08-20 23:49 UTC · Rule: default · triggered by @pawanjay176 with the @mergifyio queue command
✅ Checks passed · on draft merge queue: checking unstable (67a247f) and #9804 together #9902
✅ Merged — 2026-08-21 00:18 UTC · at ee05f3692cbb9080a08a8047915769ceda869fa0 · squash

This pull request spent 29 minutes 26 seconds in the queue, including 27 minutes 23 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 Builder API client and adapt execution layer (Gloas builder API 2/5) #9804

ethDreamer mentioned this pull request Aug 13, 2026

Add Gloas bid selection, block production, and bid gossip processing (Gloas builder API 3/5) #9805

Open

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch from 9274899 to d1cbba9 Compare August 13, 2026 23:39

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch from d1cbba9 to 490d128 Compare August 14, 2026 00:03

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch 2 times, most recently from 482984b to 0ca9777 Compare August 17, 2026 16:52

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch from 0ca9777 to 510e3a2 Compare August 18, 2026 17:51

pawanjay176 approved these changes Aug 19, 2026

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eserilev mentioned this pull request Aug 19, 2026

glamsterdam-devnet-8 #9881

Draft

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch from 510e3a2 to 06b84f3 Compare August 19, 2026 19:31

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch from 06b84f3 to 2d74338 Compare August 19, 2026 21:58

ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch 2 times, most recently from 120d9ca to c0283d0 Compare August 20, 2026 21:41

pawanjay176 added backwards-incompat Backwards-incompatible API change gloas labels Aug 20, 2026

pawanjay176 approved these changes Aug 20, 2026

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mergify Bot added the queued label Aug 20, 2026

mergify Bot mentioned this pull request Aug 20, 2026

merge queue: checking unstable (6e1fae3) and [#9803 + #9804] together #9901

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Base automatically changed from stack/ethDreamer/gloas-builder-api-stacked/add-builder-api-types-req-auth-domain-eth2-client--1df19d46 to unstable August 20, 2026 23:09

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ethDreamer force-pushed the stack/ethDreamer/gloas-builder-api-stacked/add-gloas-builder-api-client-adapt-execution--5bcab56f branch from c0283d0 to ee05f36 Compare August 20, 2026 23:35

mergify Bot removed the dequeued label Aug 20, 2026

mergify Bot added the queued label Aug 20, 2026

mergify Bot mentioned this pull request Aug 20, 2026

merge queue: checking unstable (67a247f) and #9804 together #9902

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mergify Bot merged commit 31d8cfd into unstable Aug 21, 2026
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mergify Bot removed the queued label Aug 21, 2026

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Add Gloas Builder API client and adapt execution layer (Gloas builder API 2/5) - #9804

Add Gloas Builder API client and adapt execution layer (Gloas builder API 2/5)#9804
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