Could not get sync aggregate rewards

[hwhe]

Describe the bug

in mev scence. my vc call getHeader request to prysm failed. it return "Could not get sync aggregate rewards" and the httpcode is 500.

{
"message": "Could not get sync aggregate rewards: could not verify sync committee signature: invalid sync committee signature",
"code": 500
}

I don't know why that is. Can someone explain this to me?

Has this worked before in a previous version?

ok

🔬 Minimal Reproduction

No response

Error

the prysm logs:

time="2024-04-22 21:05:49" level=info msg="Finished applying state transition" attestations=128 deposits=16 kzgCommitmentCount=6 payloadHash=0x49ac12dc54f2 prefix=blockchain slot=8913927 syncBitsCount=502 txCount=48
time="2024-04-22 21:05:49" level=info msg="Synced new block" block=0x2376c22a... epoch=278560 finalizedEpoch=278558 finalizedRoot=0x3f222d39... prefix=blockchain slot=8913927
time="2024-04-22 21:05:37" level=info msg="Finished applying state transition" attestations=128 deposits=16 kzgCommitmentCount=2 payloadHash=0x2d587397aeaf prefix=blockchain slot=8913926 syncBitsCount=365 txCount=135
time="2024-04-22 21:05:37" level=info msg="Synced new block" block=0xd36f7a10... epoch=278560 finalizedEpoch=278558 finalizedRoot=0x3f222d39... prefix=blockchain slot=8913926
time="2024-04-22 21:05:30" level=info msg="Peer summary" activePeers=9 inbound=3 outbound=6 prefix=p2p
time="2024-04-22 21:05:25" level=info msg="Finished applying state transition" attestations=128 deposits=16 kzgCommitmentCount=6 payloadHash=0xda8d0654c2c3 prefix=blockchain slot=8913925 syncBitsCount=507 txCount=276
time="2024-04-22 21:05:25" level=info msg="Synced new block" block=0xe6e26595... epoch=278560 finalizedEpoch=278558 finalizedRoot=0x3f222d39... prefix=blockchain slot=8913925
time="2024-04-22 21:05:21" level=info msg="Attempted late block reorg aborted due to attestations at 10 seconds" prefix=blockchain root=0xc1663a7dca530c3d0c5c1cabdade381057dd7d5b00efaa23277e9500b93ac5b8 weight=989499000000000
time="2024-04-22 21:05:13" level=info msg="Finished building block" prefix="rpc/validator" sinceSlotStartTime=2.012987948s slot=8913924 validator=1331977
time="2024-04-22 21:05:12" level=info msg="Finished building block" prefix="rpc/validator" sinceSlotStartTime=1.911513981s slot=8913924 validator=1331977
time="2024-04-22 21:05:12" level=info msg="Received header with bid" blockHash=0x2692bcea8235e96230ca79b53fe24b0a84cb526c4b84cb6494751328a5d3923a builderPubKey=0xb0b07cd0abef743db4260b0ed50619cf6ad4d82064cb4fbec9d3ec530f7c5e6793d9f286c4e082c0244ffb9f2658fe88 gweiValue=20000000 kzgCommitmentCount=6 prefix="rpc/validator" sinceSlotStartTime=1.809671128s slot=8913924 validator=1331977
time="2024-04-22 21:05:12" level=info msg="Received header with bid" blockHash=0x2692bcea8235e96230ca79b53fe24b0a84cb526c4b84cb6494751328a5d3923a builderPubKey=0xb0b07cd0abef743db4260b0ed50619cf6ad4d82064cb4fbec9d3ec530f7c5e6793d9f286c4e082c0244ffb9f2658fe88 gweiValue=20000000 kzgCommitmentCount=6 prefix="rpc/validator" sinceSlotStartTime=1.77134669s slot=8913924 validator=1331977
time="2024-04-22 21:05:11" level=info msg="Begin building block" prefix="rpc/validator" sinceSlotStartTime=715.442665ms slot=8913924
time="2024-04-22 21:05:11" level=info msg="Begin building block" prefix="rpc/validator" sinceSlotStartTime=653.504794ms slot=8913924
time="2024-04-22 21:05:03" level=info msg="Finished applying state transition" attestations=128 deposits=16 kzgCommitmentCount=6 payloadHash=0x5606a17ff159 prefix=blockchain slot=8913923 syncBitsCount=505 txCount=111
time="2024-04-22 21:05:03" level=info msg="Synced new block" block=0xc1663a7d... epoch=278560 finalizedEpoch=278558 finalizedRoot=0x3f222d39... prefix=blockchain slot=8913923
time="2024-04-22 21:05:03" level=info msg="Forkchoice updated with payload attributes for proposal" blockRoot=0xa2de56b57a11 headSlot=8913922 payloadID=0x03d012c3a21e prefix=blockchain

Platform(s)

Linux (x86)

What version of Prysm are you running? (Which release)

v5.0.2

Anything else relevant (validator index / public key)?

No response

[hwhe]

The public key of the sync committee is obtained from the local beaconState.

type BeaconState struct {
   ....
   currentSyncCommittee                *ethpb.SyncCommittee
}

committeeKeys := currentSyncCommittee.Pubkeys

for i := uint64(0); i < sync.SyncCommitteeBits.Len(); i++ {
		vIdx, exists := s.ValidatorIndexByPubkey(bytesutil.ToBytes48(committeeKeys[i]))
		// Impossible scenario.
		if !exists {
			return nil, nil, 0, errors.New("validator public key does not exist in state")
		}

		if sync.SyncCommitteeBits.BitAt(i) {
			pubKey, err := bls.PublicKeyFromBytes(committeeKeys[i])
			if err != nil {
				return nil, nil, 0, err
			}
			votedKeys = append(votedKeys, pubKey)
			if err := helpers.IncreaseBalance(s, vIdx, participantReward); err != nil {
				return nil, nil, 0, err
			}
			earnedProposerReward += proposerReward
		} else {
			if err := helpers.DecreaseBalance(s, vIdx, participantReward); err != nil {
				return nil, nil, 0, err
			}
		}
	}

The signature of the sync committee is maybe obtained from mevRelay.

	sa, err := signed.Block().Body().SyncAggregate()
	if err != nil {
		return nil, errors.Wrap(err, "could not get sync aggregate from block")
	}
	state, _, err = altair.ProcessSyncAggregate(ctx, state, sa)

The result is failed to verify the signature. What's the reason for this?

	if err := VerifySyncCommitteeSig(s, votedKeys, sync.SyncCommitteeSignature); err != nil {
		return nil, 0, errors.Wrap(err, "could not verify sync committee signature")
	}