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check for duplicate candidates in block headers

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This commit is contained in:
whyrusleeping 2020-01-10 09:57:58 -08:00
parent 469136ee86
commit 83605dfd95
1 changed files with 6 additions and 0 deletions
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6
chain/sync.go
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@ -545,7 +545,13 @@ func (syncer *Syncer) ValidateBlock(ctx context.Context, b *types.FullBlock) err
return xerrors.Errorf("no candidates") return xerrors.Errorf("no candidates")
} }
wins := make(map[uint64]bool)
for _, t := range h.EPostProof.Candidates { for _, t := range h.EPostProof.Candidates {
if wins[t.ChallengeIndex] {
return xerrors.Errorf("block had duplicate epost candidates")
}
wins[t.ChallengeIndex] = true
if !types.IsTicketWinner(t.Partial, ssize, snum.Uint64(), tpow) { if !types.IsTicketWinner(t.Partial, ssize, snum.Uint64(), tpow) {
return xerrors.Errorf("miner created a block but was not a winner") return xerrors.Errorf("miner created a block but was not a winner")
} }