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VerifyFinalizedConsistency - return early when canonical (#7628)

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Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
This commit is contained in:
terence tsao 2020-10-23 12:02:20 -07:00 committed by GitHub
parent 9ea69a070e
commit ebb3fa71f1
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2 changed files with 36 additions and 0 deletions
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30
beacon-chain/blockchain/process_attestation_test.go
View File

@ -545,6 +545,36 @@ func TestVerifyFinalizedConsistency_OK(t *testing.T) {
require.NoError(t, err)
}
func TestVerifyFinalizedConsistency_IsCanonical(t *testing.T) {
ctx := context.Background()
db, _ := testDB.SetupDB(t)
cfg := &Config{BeaconDB: db, ForkChoiceStore: protoarray.New(0, 0, [32]byte{})}
service, err := NewService(ctx, cfg)
require.NoError(t, err)
b32 := testutil.NewBeaconBlock()
b32.Block.Slot = 32
r32, err := b32.Block.HashTreeRoot()
require.NoError(t, err)
service.finalizedCheckpt = &ethpb.Checkpoint{Epoch: 1, Root: r32[:]}
b33 := testutil.NewBeaconBlock()
b33.Block.Slot = 33
b33.Block.ParentRoot = r32[:]
r33, err := b33.Block.HashTreeRoot()
require.NoError(t, err)
require.NoError(t, service.forkChoiceStore.ProcessBlock(ctx, b32.Block.Slot, r32, [32]byte{}, [32]byte{}, 0, 0))
require.NoError(t, service.forkChoiceStore.ProcessBlock(ctx, b33.Block.Slot, r33, r32, [32]byte{}, 0, 0))
_, err = service.forkChoiceStore.Head(ctx, 0, r32, []uint64{}, 0)
require.NoError(t, err)
err = service.VerifyFinalizedConsistency(context.Background(), r33[:])
require.NoError(t, err)
}
func TestGetAttCheckptInfo(t *testing.T) {
ctx := context.Background()
db, _ := testDB.SetupDB(t)

6
beacon-chain/blockchain/receive_attestation.go
View File

@ -102,6 +102,12 @@ func (s *Service) VerifyLmdFfgConsistency(ctx context.Context, a *ethpb.Attestat
// When the input root is not be consistent with finalized store then we know it is not
// on the finalized check point that leads to current canonical chain and should be rejected accordingly.
func (s *Service) VerifyFinalizedConsistency(ctx context.Context, root []byte) error {
// A canonical root implies the root to has an ancestor that aligns with finalized check point.
// In this case, we could exit early to save on additional computation.
if s.forkChoiceStore.IsCanonical(bytesutil.ToBytes32(root)) {
return nil
}
f := s.FinalizedCheckpt()
ss, err := helpers.StartSlot(f.Epoch)
if err != nil {