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also pack attestations where LMD vote is orphaned (#5002)

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* also pack attestations where LMD vote is orphaned

When `attestation.data.beacon_block_root` gets orphaned, attestations
with a good `attestation.data.target.root` may still be valuable.
The LMD GHOST vote is not relevant for attestation rewards.

Switch to use the FFG vote (`attestation.data.target.root`) instead,
gossip validation ensures it is an ancestor of `beacon_block_root`.

* lint
This commit is contained in:
Etan Kissling 2023-06-04 12:39:12 +02:00 committed by GitHub
parent f86febc111
commit 12381d5f33
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 13 additions and 19 deletions
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22
beacon_chain/consensus_object_pools/attestation_pool.nim
View File

@ -537,26 +537,21 @@ func score(
proc check_attestation_compatible*(
dag: ChainDAGRef,
state: ForkyBeaconState,
state: ForkyHashedBeaconState,
attestation: SomeAttestation): Result[void, cstring] =
let targetEpoch = attestation.data.target.epoch
if targetEpoch <= MIN_SEED_LOOKAHEAD:
return ok()
let
attestedBlck =
dag.getBlockRef(attestation.data.beacon_block_root).valueOr:
return err("Unknown `beacon_block_root`")
targetEpoch = attestation.data.target.epoch
compatibleRoot = state.dependent_root(targetEpoch.get_previous_epoch)
dependentSlot = (targetEpoch - MIN_SEED_LOOKAHEAD).start_slot - 1
attestedBlck = dag.getBlockRef(attestation.data.target.root).valueOr:
return err("Unknown `target.root`")
dependentSlot = targetEpoch.attester_dependent_slot
dependentBid = dag.atSlot(attestedBlck.bid, dependentSlot).valueOr:
return err("Dependent root not found")
dependentRoot = dependentBid.bid.root
compatibleRoot = state.get_block_root_at_slot(dependentSlot)
if dependentRoot != compatibleRoot:
return err("Incompatible shuffling")
ok()
proc getAttestationsForBlock*(pool: var AttestationPool,
@ -610,8 +605,7 @@ proc getAttestationsForBlock*(pool: var AttestationPool,
# Filter out attestations that were created with a different shuffling.
# As we don't re-check signatures, this needs to be done separately
if not check_attestation_compatible(
pool.dag, state.data, attestation).isOk():
if not pool.dag.check_attestation_compatible(state, attestation).isOk():
continue
# Attestations are checked based on the state that we're adding the

10
tests/test_attestation_pool.nim
View File

@ -1,5 +1,5 @@
# beacon_chain
# Copyright (c) 2018-2022 Status Research & Development GmbH
# Copyright (c) 2018-2023 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@ -164,12 +164,12 @@ suite "Attestation pool processing" & preset():
# An additional compatibility check catches that (used in block production)
withState(state[]):
check:
check_attestation_compatible(dag, forkyState.data, att1).isOk
check_attestation_compatible(dag, forkyState.data, att2).isErr
check_attestation_compatible(dag, forkyState, att1).isOk
check_attestation_compatible(dag, forkyState, att2).isErr
withState(state2[]):
check:
check_attestation_compatible(dag, forkyState.data, att1).isErr
check_attestation_compatible(dag, forkyState.data, att2).isOk
check_attestation_compatible(dag, forkyState, att1).isErr
check_attestation_compatible(dag, forkyState, att2).isOk
test "Can add and retrieve simple attestations" & preset():
let