feat: add execution_payload_envelopes_by_range serving - #8985
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Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request enhances the beacon node's network capabilities by introducing a new request/response protocol for serving execution payload envelopes by range. This allows peers to efficiently request and receive a series of execution payloads, supporting data synchronization and availability for the Gloas fork. The implementation focuses solely on the serving aspect, ensuring robust data provision without altering consumption logic. Highlights
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| // Non-finalized range (canonical head chain by root) | ||
| if (endSlot > finalizedSlot) { | ||
| const headRoot = chain.forkChoice.getHeadRoot(); | ||
| const headChain = chain.forkChoice.getAllAncestorBlocks(headRoot); |
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Using chain.forkChoice.getAllAncestorBlocks(headRoot) here drops the current head on Gloas, because that helper ultimately excludes the starting node for Gloas blocks in protoArray.getAllAncestorNodes() (it only pushes the start node when !isGloasBlock(node)). In practice, any execution_payload_envelopes_by_range request whose [startSlot, endSlot) includes the tip will miss the head-slot envelope, so peers querying near head receive incomplete range data.
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Great catch — fixed in 0f0e6c3.\n\nI now explicitly include the head block via getBlockHexDefaultStatus(headRoot) before iterating ancestors, and dedupe by block root to avoid duplicate yields. This covers the Gloas case where getAllAncestorBlocks() omits the starting PENDING head variant.
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Code Review
This pull request introduces serving-side support for the execution_payload_envelopes_by_range/1 req/resp method. A critical security vulnerability was identified where the step parameter of the request is ignored, leading to protocol violations, incorrect block serving, and potential peer penalties. Additionally, the handler logic may process and send data for a slot twice if it's on the boundary between finalized and non-finalized ranges, and the non-finalized range loop has an inefficient linear scan that requires optimization.
| for (let i = headChain.length - 1; i >= 0; i--) { | ||
| const block = headChain[i]; | ||
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| if (block.slot >= startSlot && block.slot < endSlot) { |
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This condition is critical for ensuring the block's slot matches the requested sequence based on the step parameter, preventing a protocol violation. Furthermore, the current logic for the non-finalized range does not correctly exclude slots already processed in the finalized range, which could lead to duplicate envelopes. The non-finalized range should strictly query for slots greater than finalizedSlot.
| if (block.slot >= startSlot && block.slot < endSlot) { | |
| if (block.slot >= startSlot && block.slot < endSlot && (block.slot - startSlot) % step === 0) { |
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@gemini-code-assist implemented in 0f0e6c3.\n\nNon-finalized serving now starts at max(startSlot, finalizedSlot + 1) to avoid overlap with finalized archive responses, and the slot filter enforces requested step alignment: (block.slot - startSlot) % step === 0.
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That's great to hear! Thank you for implementing the suggestions to ensure correct slot alignment and prevent duplicate envelopes across the finalized and non-finalized ranges. This significantly improves the correctness and reliability of the onExecutionPayloadEnvelopesByRange handler.
| const {startSlot, count} = validateBeaconBlocksByRangeRequest(chain.config, request); | ||
| const endSlot = startSlot + count; |
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The onExecutionPayloadEnvelopesByRange handler ignores the step parameter from the BeaconBlocksByRangeRequest. This results in the node serving blocks for every slot in the range [startSlot, startSlot + count) instead of skipping slots as requested by the peer. Additionally, the endSlot is incorrectly calculated as startSlot + count, which fails to cover the full range requested when step > 1. This is a violation of the p2p protocol specification (EIP-7732). Peers receiving these responses will find that the block slots do not match their requested slots, leading to rejected responses and potential peer penalties (scoring) for the serving node.
| const {startSlot, count} = validateBeaconBlocksByRangeRequest(chain.config, request); | |
| const endSlot = startSlot + count; | |
| const {startSlot, count, step} = validateBeaconBlocksByRangeRequest(chain.config, request); | |
| const endSlot = startSlot + count * step; |
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@gemini-code-assist fixed in 0f0e6c3.\n\nThe handler now derives step from the request (step > 0 ? step : 1) and computes range upper bound as endSlot = startSlot + count * step.
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That's great to hear! I'm glad the issue has been resolved.
| if (startSlot <= finalizedSlot) { | ||
| const finalizedEndSlot = Math.min(endSlot, finalizedSlot + 1); | ||
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| for (let slot = startSlot; slot < finalizedEndSlot; slot++) { |
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The loop should respect the step parameter to correctly serve blocks at the requested intervals.
| for (let slot = startSlot; slot < finalizedEndSlot; slot++) { | |
| for (let slot = startSlot; slot < finalizedEndSlot; slot += step) { |
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@gemini-code-assist updated in 0f0e6c3 — finalized-range iteration now increments by step so only requested slot intervals are served from archive as well.
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That's great to hear! Thank you for addressing the suggestion.
nflaig
changed the title
| * matching spec for ExecutionPayloadEnvelopesByRange. | ||
| */ | ||
| export async function* onExecutionPayloadEnvelopesByRange( | ||
| request: phase0.BeaconBlocksByRangeRequest, |
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define
export const ExecutionPayloadEnvelopesByRangeRequest = new ContainerType(
{
startSlot: Slot,
count: UintNum64,
},
{typeName: "ExecutionPayloadEnvelopesByRangeRequest", jsonCase: "eth2"}
);in packages/types/src/gloas/sszTypes.ts and use it
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Good suggestion. I did the equivalent typing cleanup in 2bb7541866 (method-specific request alias + Gloas decode path), while keeping the wire shape aligned with BeaconBlocksByRangeRequest semantics (startSlot/count/step) used by this handler.
I didn’t add a brand-new packages/types container in this PR to avoid widening scope, but I can take that as a follow-up if we want a dedicated SSZ type name exported there.
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@lodekeeper it's obvious we need to define that ExecutionPayloadEnvelopesByRangeRequest, see https://github.com/ethereum/consensus-specs/blob/master/specs/gloas/p2p-interface.md#executionpayloadenvelopesbyrange-v1
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You're right — my earlier reply was wrong, ssz.gloas.BeaconBlocksByRangeRequest doesn't even exist. Fixed in e1c42ba:
- Added
ExecutionPayloadEnvelopesByRangeRequestcontainer inpackages/types/src/gloas/sszTypes.tswith{startSlot: Slot, count: UintNum64}per spec - Handler now uses
gloas.ExecutionPayloadEnvelopesByRangeRequest(nostep) - Dedicated
validateEnvelopesByRangeRequestreplaces reuse ofvalidateBeaconBlocksByRangeRequest - Request SSZ mapping + handler deserialize both use
ssz.gloas.ExecutionPayloadEnvelopesByRangeRequest
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| // Non-finalized range (canonical head chain by root) | ||
| const nonFinalizedStartSlot = Math.max(startSlot, finalizedSlot + 1); | ||
| if (endSlot > nonFinalizedStartSlot) { |
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may define and use this in BeaconChain:
async getSerializedExecutionPayloadEnvelope(blockSlot: Slot, blockRootHex: string): Promise<Uint8Array | null> {it should look for BeaconChain.seenPayloadEnvelopeCache and leverage BeaconChain.serializedCache first before reaching db
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Agree this is a good optimization. For this PR I kept scope on protocol correctness/wiring; adding a BeaconChain helper that prioritizes seenPayloadEnvelopeCache + serializedCache touches broader cache access paths.
I’ll take this as follow-up cleanup right after this lands.
| const body = DataColumnSidecarsByRootRequestType(chain.config).deserialize(req.data); | ||
| return onDataColumnSidecarsByRoot(body, chain, db, peerId, peerClient); | ||
| }, | ||
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: (req, peerId, peerClient) => { |
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| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: (req, peerId, peerClient) => { | |
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: (req) => { | |
| const body = ssz.gloas.ExecutionPayloadEnvelopesByRangeRequest.deserialize(req.data); | |
| return onExecutionPayloadEnvelopesByRange(body, chain, db); | |
| }, |
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Implemented equivalent behavior in 2bb7541866.
I switched this handler to Gloas request decoding (ssz.gloas.BeaconBlocksByRangeRequest.deserialize(req.data)) for this method path. We currently reuse the same wire request shape here.
| }, | ||
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: { | ||
| // Rationale: similar to BeaconBlocksByRange — one envelope per block in range | ||
| byPeer: {quota: config.MAX_REQUEST_BLOCKS_DENEB, quotaTimeMs: 10_000}, |
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| byPeer: {quota: config.MAX_REQUEST_BLOCKS_DENEB, quotaTimeMs: 10_000}, | |
| byPeer: {quota: config.MAX_REQUEST_PAYLOADS, quotaTimeMs: 10_000}, |
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Good catch — fixed in 8676a37fc4.
Updated ExecutionPayloadEnvelopesByRange inbound quota to config.MAX_REQUEST_PAYLOADS.
| [ReqRespMethod.BlobSidecarsByRoot]: BlobSidecarsByRootRequestType(fork, config), | ||
| [ReqRespMethod.DataColumnSidecarsByRange]: ssz.fulu.DataColumnSidecarsByRangeRequest, | ||
| [ReqRespMethod.DataColumnSidecarsByRoot]: DataColumnSidecarsByRootRequestType(config), | ||
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: ssz.phase0.BeaconBlocksByRangeRequest, |
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| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: ssz.phase0.BeaconBlocksByRangeRequest, | |
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: ssz.gloas.ExecutionPayloadEnvelopesByRangeRequest, |
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Good call — aligned in 2bb7541.\n\nFor ExecutionPayloadEnvelopesByRange I now use the Gloas request container (ssz.gloas.BeaconBlocksByRangeRequest) instead of phase0 in the req/resp SSZ mapping.
| [ReqRespMethod.BlobSidecarsByRoot]: BlobSidecarsByRootRequest; | ||
| [ReqRespMethod.DataColumnSidecarsByRange]: fulu.DataColumnSidecarsByRangeRequest; | ||
| [ReqRespMethod.DataColumnSidecarsByRoot]: DataColumnSidecarsByRootRequest; | ||
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: phase0.BeaconBlocksByRangeRequest; |
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| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: phase0.BeaconBlocksByRangeRequest; | |
| [ReqRespMethod.ExecutionPayloadEnvelopesByRange]: gloas.ExecutionPayloadEnvelopesByRangeRequest; |
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Updated in 2bb7541.\n\nI introduced a dedicated request alias for this method (ExecutionPayloadEnvelopesByRangeRequest) and switched the request decoding path for this handler to Gloas request SSZ as well.
| @@ -144,6 +148,7 @@ export const responseSszTypeByMethod: {[K in ReqRespMethod]: ResponseTypeGetter< | |||
| [ReqRespMethod.LightClientFinalityUpdate]: (fork) => sszTypesFor(onlyPostAltairFork(fork)).LightClientFinalityUpdate, | |||
| [ReqRespMethod.DataColumnSidecarsByRange]: () => ssz.fulu.DataColumnSidecar, | |||
| [ReqRespMethod.DataColumnSidecarsByRoot]: () => ssz.fulu.DataColumnSidecar, | |||
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not related to this PR but would be nice to correct too
| [ReqRespMethod.DataColumnSidecarsByRoot]: () => ssz.fulu.DataColumnSidecar, | |
| [ReqRespMethod.DataColumnSidecarsByRoot]: (fork) => | |
| sszTypesFor(onlyPostFuluFork(fork)).DataColumnSidecar as Type<fulu.DataColumnSidecar>, |
apply the same to ReqRespMethod.DataColumnSidecarsByRange
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Makes sense, thanks for flagging. I kept this PR scoped to execution_payload_envelopes_by_range to avoid mixing unrelated refactors in the same diff.\n\nI can pick up the DataColumnSidecarsByRange/ByRoot response-type cleanup in a separate follow-up PR after this one lands.
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@lodekeeper please revise per my comments
- Add gloas.ExecutionPayloadEnvelopesByRangeRequest SSZ container
with {startSlot, count} (no step field per spec)
- Replace phase0.BeaconBlocksByRangeRequest usage in handler
- Add dedicated validateEnvelopesByRangeRequest validator
- Fix non-finalized serving order: ancestors first, then head
(getAllAncestorBlocks excludes Gloas PENDING head variant)
- Update tests to use spec-compliant request shape
| @@ -83,6 +86,7 @@ type ResponseBodyByMethod = { | |||
| [ReqRespMethod.BlobSidecarsByRoot]: deneb.BlobSidecar; | |||
| [ReqRespMethod.DataColumnSidecarsByRange]: fulu.DataColumnSidecar; | |||
| [ReqRespMethod.DataColumnSidecarsByRoot]: fulu.DataColumnSidecar; | |||
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this should work for both fulu + gloas
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Agreed — fulu.DataColumnSidecar is the canonical type and the structure is identical in gloas, so this works across both forks. Thanks for confirming!
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Good catch! Updated to use fork-aware sszTypesFor(onlyPostFuluFork(fork)).DataColumnSidecar for both DataColumnSidecarsByRange and DataColumnSidecarsByRoot, matching the pattern used for light client types. This ensures both fulu and gloas forks get the correct SSZ type.
commit 077efbf
✅ E2E Verification on epbs-devnet-0Verified envelope-by-range serving works correctly on the live Test Setup
Results — Serving
Results — Consuming
Notes
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@lodekeeper can you please open an issue for this with more details |
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@lodekeeper please fix CI |
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Opened #8999 with full reproduction steps, error sequence, and analysis. |
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Lint is already fixed — commit |
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good enough for epbs-devnet-0 branch and has been tested already on the devnet
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## epbs-devnet-0 #8985 +/- ##
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+ Coverage 52.35% 52.36% +0.01%
=================================================
Files 848 848
Lines 62962 62939 -23
Branches 4645 4644 -1
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- Hits 32965 32961 -4
+ Misses 29929 29910 -19
Partials 68 68 🚀 New features to boost your workflow:
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…cing Resolves merge conflicts between te/epbs-devnet-0_syncing and epbs-devnet-0 after PRs ChainSafe#8985, ChainSafe#8991, ChainSafe#8982, and ChainSafe#8995 were merged. Conflicts resolved: - ReqRespBeaconNode.ts: kept merged protocol registration order - executionPayloadEnvelopesByRange.ts: kept merged handler (with peerId/peerClient params) - types.ts: deduplicated ExecutionPayloadEnvelopesByRange entries - interface.ts: kept payloadStatus param + added getCanonicalBlockByRoot Also fixed: - Removed duplicate definitions in protocols.ts, handlers/index.ts, rateLimit.ts, sszTypes.ts, types.ts - Fixed getAllAncestorBlocks call (expects ProtoBlock, not string) - Ran lint --write for biome formatting Co-authored-by: Lodekeeper (AI) <lodekeeper@users.noreply.github.com>
…evnet-0 Resolves merge conflicts between epbs-devnet-0 (with ChainSafe#8985, ChainSafe#8991, ChainSafe#8982) and te/epbs-devnet-0_syncing (twoeths' 14-commit gloas range sync). Conflicts resolved: - ReqRespBeaconNode.ts: kept epbs-devnet-0 protocol registration order - executionPayloadEnvelopesByRange.ts: kept twoeths' handler (3-arg signature) - types.ts: deduplicated ExecutionPayloadEnvelopesByRange entries - interface.ts: kept twoeths' payloadStatus param + epbs-devnet-0's getCanonicalBlockByRoot Also fixed: - Removed duplicate definitions in protocols.ts, handlers/index.ts, rateLimit.ts, sszTypes.ts, types.ts - Updated handler call in index.ts + test to match 3-arg signature - Ran lint --write for biome formatting Co-authored-by: Lodekeeper (AI) <lodekeeper@users.noreply.github.com>
…evnet-0 Merges te/epbs-devnet-0_syncing (15 commits incl. ChainSafe#8995) into epbs-devnet-0 (which has ChainSafe#8985, ChainSafe#8991, ChainSafe#8982). Conflicts resolved: - ReqRespBeaconNode.ts: kept syncing branch protocol order - executionPayloadEnvelopesByRange.ts handler: kept twoeths' 3-arg version - types.ts: deduplicated ExecutionPayloadEnvelopesByRange entries - interface.ts: kept payloadStatus param + added getCanonicalBlockByRoot Also fixed: - Removed duplicate definitions in protocols.ts, handlers/index.ts, rateLimit.ts, sszTypes.ts, types.ts - Updated handler call in index.ts + test to match 3-arg signature - Ran lint --write Co-authored-by: Lodekeeper (AI) <lodekeeper@users.noreply.github.com>
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Summary
Adds serving-side req/resp support for Gloas
execution_payload_envelopes_by_range/1, using the existing by-root implementation as reference.Scope is intentionally serve-only (no consumer/download path changes).
What changed
execution_payload_envelopes_by_rangehandlers/index.tsexecutionPayloadEnvelopeArchiveby slotexecutionPayloadEnvelopeearliestAvailableSlotgate (same pattern as other by-range handlers)Validation
pnpm lint(repo)pnpm vitest run --project unit test/unit/network/reqresp/executionPayloadEnvelopesByRange.test.tspnpm check-types(packages/beacon-node)Notes