package consensus import ( "sync" "testing" "github.com/stretchr/testify/require" "github.com/tendermint/tendermint/libs/bytes" tmrand "github.com/tendermint/tendermint/libs/rand" "github.com/tendermint/tendermint/p2p" tmcons "github.com/tendermint/tendermint/proto/tendermint/consensus" tmproto "github.com/tendermint/tendermint/proto/tendermint/types" "github.com/tendermint/tendermint/types" ) func TestReactorInvalidPrecommit(t *testing.T) { configSetup(t) n := 4 states, cleanup := randConsensusState(n, "consensus_reactor_test", newMockTickerFunc(true), newCounter) t.Cleanup(cleanup) for i := 0; i < 4; i++ { ticker := NewTimeoutTicker() ticker.SetLogger(states[i].Logger) states[i].SetTimeoutTicker(ticker) } rts := setup(t, n, states, 100) // buffer must be large enough to not deadlock for _, reactor := range rts.reactors { state := reactor.state.GetState() reactor.SwitchToConsensus(state, false) } // this val sends a random precommit at each height node := rts.network.RandomNode() byzState := rts.states[node.NodeID] byzReactor := rts.reactors[node.NodeID] // Update the doPrevote function to just send a valid precommit for a random // block and otherwise disable the priv validator. byzState.mtx.Lock() privVal := byzState.privValidator byzState.doPrevote = func(height int64, round int32) { invalidDoPrevoteFunc(t, height, round, byzState, byzReactor, privVal) } byzState.mtx.Unlock() // wait for a bunch of blocks // // TODO: Make this tighter by ensuring the halt happens by block 2. var wg sync.WaitGroup for i := 0; i < 10; i++ { for _, sub := range rts.subs { wg.Add(1) go func(s types.Subscription) { <-s.Out() wg.Done() }(sub) } } wg.Wait() } func invalidDoPrevoteFunc(t *testing.T, height int64, round int32, cs *State, r *Reactor, pv types.PrivValidator) { // routine to: // - precommit for a random block // - send precommit to all peers // - disable privValidator (so we don't do normal precommits) go func() { cs.mtx.Lock() cs.privValidator = pv pubKey, err := cs.privValidator.GetPubKey() require.NoError(t, err) addr := pubKey.Address() valIndex, _ := cs.Validators.GetByAddress(addr) // precommit a random block blockHash := bytes.HexBytes(tmrand.Bytes(32)) precommit := &types.Vote{ ValidatorAddress: addr, ValidatorIndex: valIndex, Height: cs.Height, Round: cs.Round, Timestamp: cs.voteTime(), Type: tmproto.PrecommitType, BlockID: types.BlockID{ Hash: blockHash, PartSetHeader: types.PartSetHeader{Total: 1, Hash: tmrand.Bytes(32)}}, } p := precommit.ToProto() err = cs.privValidator.SignVote(cs.state.ChainID, p) require.NoError(t, err) precommit.Signature = p.Signature cs.privValidator = nil // disable priv val so we don't do normal votes cs.mtx.Unlock() for _, ps := range r.peers { cs.Logger.Info("sending bad vote", "block", blockHash, "peer", ps.peerID) r.voteCh.Out <- p2p.Envelope{ To: ps.peerID, Message: &tmcons.Vote{ Vote: precommit.ToProto(), }, } } }() }