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handle self-builds during envelope broadcasting #7979

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handle self-builds during envelope broadcasting #7979

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12 changes: 10 additions & 2 deletions beacon_chain/gossip_processing/gossip_validation.nim
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Original file line number Diff line number Diff line change
Expand Up @@ -1036,7 +1036,7 @@ proc validateBeaconBlock*(

ok()

# https://github.com/ethereum/consensus-specs/blob/v1.7.0-alpha.1/specs/gloas/p2p-interface.md#execution_payload
# https://github.com/ethereum/consensus-specs/blob/v1.7.0-alpha.2/specs/gloas/p2p-interface.md#execution_payload
proc validateExecutionPayload*(
dag: ChainDAGRef, quarantine: ref Quarantine,
envelopeQuarantine: ref EnvelopeQuarantine,
Expand Down Expand Up @@ -1109,12 +1109,20 @@ proc validateExecutionPayload*(
# [REJECT] signed_execution_payload_envelope.signature is valid with respect
# to the builder's public key.
if dag.headState.kind >= ConsensusFork.Gloas:
let builderKey =
if bid.builder_index == BUILDER_INDEX_SELF_BUILD:
dag.validatorKey(blck.proposer_index).valueOr:
return dag.checkedReject("ExecutionPayload: unknown proposer")
else:
dag.validatorKey(bid.builder_index).valueOr:
return dag.checkedReject("ExecutionPayload: unknown builder index")

if not verify_execution_payload_envelope_signature(
dag.forkAtEpoch(envelope.slot.epoch),
dag.genesis_validators_root,
envelope.slot.epoch,
signed_execution_payload_envelope.message,
dag.validatorKey(envelope.builder_index).get(),
builderKey,
signed_execution_payload_envelope.signature):
return dag.checkedReject("ExecutionPayload: invalid builder signature")
else:
Expand Down
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