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feat: refactor slashfilter to return bool indicating fault

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This commit is contained in:
Aayush 2023-06-13 10:35:02 -04:00
parent 4cfdf8e83c
commit 802a9f0a78
3 changed files with 49 additions and 25 deletions
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48
chain/gen/slashfilter/slashfilter.go
View File

@ -26,20 +26,30 @@ func New(dstore ds.Batching) *SlashFilter {
}
}
func (f *SlashFilter) MinedBlock(ctx context.Context, bh *types.BlockHeader, parentEpoch abi.ChainEpoch) (cid.Cid, error) {
func (f *SlashFilter) MinedBlock(ctx context.Context, bh *types.BlockHeader, parentEpoch abi.ChainEpoch) (cid.Cid, bool, error) {
epochKey := ds.NewKey(fmt.Sprintf("/%s/%d", bh.Miner, bh.Height))
{
// double-fork mining (2 blocks at one epoch)
if witness, err := checkFault(ctx, f.byEpoch, epochKey, bh, "double-fork mining faults"); err != nil {
return witness, xerrors.Errorf("check double-fork mining faults: %w", err)
doubleForkWitness, doubleForkFault, err := checkFault(ctx, f.byEpoch, epochKey, bh, "double-fork mining faults")
if err != nil {
return cid.Undef, false, xerrors.Errorf("check double-fork mining faults: %w", err)
}
if doubleForkFault {
return doubleForkWitness, doubleForkFault, nil
}
}
parentsKey := ds.NewKey(fmt.Sprintf("/%s/%x", bh.Miner, types.NewTipSetKey(bh.Parents...).Bytes()))
{
// time-offset mining faults (2 blocks with the same parents)
if witness, err := checkFault(ctx, f.byParents, parentsKey, bh, "time-offset mining faults"); err != nil {
return witness, xerrors.Errorf("check time-offset mining faults: %w", err)
timeOffsetWitness, timeOffsetFault, err := checkFault(ctx, f.byParents, parentsKey, bh, "time-offset mining faults")
if err != nil {
return cid.Undef, false, xerrors.Errorf("check time-offset mining faults: %w", err)
}
if timeOffsetFault {
return timeOffsetWitness, timeOffsetFault, nil
}
}
@ -50,19 +60,19 @@ func (f *SlashFilter) MinedBlock(ctx context.Context, bh *types.BlockHeader, par
parentEpochKey := ds.NewKey(fmt.Sprintf("/%s/%d", bh.Miner, parentEpoch))
have, err := f.byEpoch.Has(ctx, parentEpochKey)
if err != nil {
return cid.Undef, err
return cid.Undef, false, xerrors.Errorf("failed to read from db: %w", err)
}
if have {
// If we had, make sure it's in our parent tipset
cidb, err := f.byEpoch.Get(ctx, parentEpochKey)
if err != nil {
return cid.Undef, xerrors.Errorf("getting other block cid: %w", err)
return cid.Undef, false, xerrors.Errorf("getting other block cid: %w", err)
}
_, parent, err := cid.CidFromBytes(cidb)
if err != nil {
return cid.Undef, err
return cid.Undef, false, xerrors.Errorf("failed to read cid from bytes: %w", err)
}
var found bool
@ -73,45 +83,45 @@ func (f *SlashFilter) MinedBlock(ctx context.Context, bh *types.BlockHeader, par
}
if !found {
return parent, xerrors.Errorf("produced block would trigger 'parent-grinding fault' consensus fault; miner: %s; bh: %s, expected parent: %s", bh.Miner, bh.Cid(), parent)
return parent, true, nil
}
}
}
if err := f.byParents.Put(ctx, parentsKey, bh.Cid().Bytes()); err != nil {
return cid.Undef, xerrors.Errorf("putting byEpoch entry: %w", err)
return cid.Undef, false, xerrors.Errorf("putting byEpoch entry: %w", err)
}
if err := f.byEpoch.Put(ctx, epochKey, bh.Cid().Bytes()); err != nil {
return cid.Undef, xerrors.Errorf("putting byEpoch entry: %w", err)
return cid.Undef, false, xerrors.Errorf("putting byEpoch entry: %w", err)
}
return cid.Undef, nil
return cid.Undef, false, nil
}
func checkFault(ctx context.Context, t ds.Datastore, key ds.Key, bh *types.BlockHeader, faultType string) (cid.Cid, error) {
func checkFault(ctx context.Context, t ds.Datastore, key ds.Key, bh *types.BlockHeader, faultType string) (cid.Cid, bool, error) {
fault, err := t.Has(ctx, key)
if err != nil {
return cid.Undef, xerrors.Errorf("failed to read from datastore: %w", err)
return cid.Undef, false, xerrors.Errorf("failed to read from datastore: %w", err)
}
if fault {
cidb, err := t.Get(ctx, key)
if err != nil {
return cid.Undef, xerrors.Errorf("getting other block cid: %w", err)
return cid.Undef, false, xerrors.Errorf("getting other block cid: %w", err)
}
_, other, err := cid.CidFromBytes(cidb)
if err != nil {
return cid.Undef, err
return cid.Undef, false, xerrors.Errorf("failed to read cid of other block: %w", err)
}
if other == bh.Cid() {
return cid.Undef, nil
return cid.Undef, false, nil
}
return other, xerrors.Errorf("produced block would trigger '%s' consensus fault; miner: %s; bh: %s, other: %s", faultType, bh.Miner, bh.Cid(), other)
return other, true, nil
}
return cid.Undef, nil
return cid.Undef, false, nil
}

11
miner/miner.go
View File

@ -324,9 +324,16 @@ minerLoop:
"block-time", btime, "time", build.Clock.Now(), "difference", build.Clock.Since(btime))
}
if _, err = m.sf.MinedBlock(ctx, b.Header, base.TipSet.Height()+base.NullRounds); err != nil {
log.Errorf("<!!> SLASH FILTER ERROR: %s", err)
if os.Getenv("LOTUS_MINER_NO_SLASHFILTER") != "_yes_i_know_i_can_and_probably_will_lose_all_my_fil_and_power_" {
witness, fault, err := m.sf.MinedBlock(ctx, b.Header, base.TipSet.Height()+base.NullRounds)
if err != nil {
log.Errorf("<!!> SLASH FILTER ERRORED: %s", err)
// Continue here, because it's _probably_ wiser to not submit this block
continue
}
if fault {
log.Errorf("<!!> SLASH FILTER DETECTED FAULT due to witness %s", witness)
continue
}
}

13
node/impl/full/sync.go
View File

@ -58,9 +58,16 @@ func (a *SyncAPI) SyncSubmitBlock(ctx context.Context, blk *types.BlockMsg) erro
}
if a.SlashFilter != nil && os.Getenv("LOTUS_NO_SLASHFILTER") != "_yes_i_know_i_can_and_probably_will_lose_all_my_fil_and_power_" {
if _, err = a.SlashFilter.MinedBlock(ctx, blk.Header, parent.Height); err != nil {
log.Errorf("<!!> SLASH FILTER ERROR: %s", err)
return xerrors.Errorf("<!!> SLASH FILTER ERROR: %w", err)
witness, fault, err := a.SlashFilter.MinedBlock(ctx, blk.Header, parent.Height)
if err != nil {
log.Errorf("<!!> SLASH FILTER ERRORED: %s", err)
// Return an error here, because it's _probably_ wiser to not submit this block
return xerrors.Errorf("<!!> SLASH FILTER ERRORED: %w", err)
}
if fault {
log.Errorf("<!!> SLASH FILTER DETECTED FAULT due to witness %s", witness)
return xerrors.Errorf("<!!> SLASH FILTER DETECTED FAULT due to witness %s", witness)
}
}