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fix: handle the parent-grinding mining fault

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This commit is contained in:
mx 2023-06-08 18:49:39 +08:00
parent 2fd8602c5a
commit 16b9787db9
1 changed files with 18 additions and 3 deletions
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21
cmd/lotus/daemon.go
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@ -684,12 +684,12 @@ func slashConsensus(a lapi.FullNode, p string, from string) error {
return err
}
func slashFilterMinedBlock(ctx context.Context, sf *slashfilter.SlashFilter, a lapi.FullNode, bh *types.BlockHeader) (*types.BlockHeader, error) {
parent, err := a.ChainGetBlock(ctx, bh.Parents[0])
func slashFilterMinedBlock(ctx context.Context, sf *slashfilter.SlashFilter, a lapi.FullNode, blockB *types.BlockHeader) (*types.BlockHeader, error) {
blockC, err := a.ChainGetBlock(ctx, blockB.Parents[0])
if err != nil {
return nil, xerrors.Errorf("chain get block error:%s", err)
}
otherCid, err := sf.CheckBlock(ctx, bh, parent.Height)
otherCid, err := sf.CheckBlock(ctx, blockB, blockC.Height)
if err != nil {
return nil, xerrors.Errorf("slash filter check block error:%s", err)
}
@ -697,5 +697,20 @@ func slashFilterMinedBlock(ctx context.Context, sf *slashfilter.SlashFilter, a l
otherHeader, err := a.ChainGetBlock(ctx, otherCid)
return otherHeader, xerrors.Errorf("chain get other block error:%s", err)
}
blockA, err := a.ChainGetBlock(ctx, otherCid)
// (c) parent-grinding fault
// Here extra is the "witness", a third block that shows the connection between A and B as
// A's sibling and B's parent.
// Specifically, since A is of lower height, it must be that B was mined omitting A from its tipset
//
// B
// |
// [A, C]
if types.CidArrsEqual(blockA.Parents, blockC.Parents) && blockA.Height == blockC.Height &&
types.CidArrsContains(blockB.Parents, blockC.Cid()) && !types.CidArrsContains(blockB.Parents, blockA.Cid()) {
return blockC, xerrors.Errorf("chain get other block error:%s", err)
}
return nil, nil
}