package contractcourt import ( "io/ioutil" "net" "os" "testing" "github.com/btcsuite/btcd/chaincfg/chainhash" "github.com/btcsuite/btcd/wire" "github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/clock" "github.com/lightningnetwork/lnd/lnwallet" ) // TestChainArbitratorRepulishCloses tests that the chain arbitrator will // republish closing transactions for channels marked CommitementBroadcast or // CoopBroadcast in the database at startup. func TestChainArbitratorRepublishCloses(t *testing.T) { t.Parallel() tempPath, err := ioutil.TempDir("", "testdb") if err != nil { t.Fatal(err) } defer os.RemoveAll(tempPath) db, err := channeldb.Open(tempPath) if err != nil { t.Fatal(err) } defer db.Close() // Create 10 test channels and sync them to the database. const numChans = 10 var channels []*channeldb.OpenChannel for i := 0; i < numChans; i++ { lChannel, _, cleanup, err := lnwallet.CreateTestChannels( channeldb.SingleFunderTweaklessBit, ) if err != nil { t.Fatal(err) } defer cleanup() channel := lChannel.State() // We manually set the db here to make sure all channels are // synced to the same db. channel.Db = db addr := &net.TCPAddr{ IP: net.ParseIP("127.0.0.1"), Port: 18556, } if err := channel.SyncPending(addr, 101); err != nil { t.Fatal(err) } channels = append(channels, channel) } // Mark half of the channels as commitment broadcasted. for i := 0; i < numChans/2; i++ { closeTx := channels[i].FundingTxn.Copy() closeTx.TxIn[0].PreviousOutPoint = channels[i].FundingOutpoint err := channels[i].MarkCommitmentBroadcasted(closeTx, true) if err != nil { t.Fatal(err) } err = channels[i].MarkCoopBroadcasted(closeTx, true) if err != nil { t.Fatal(err) } } // We keep track of the transactions published by the ChainArbitrator // at startup. published := make(map[chainhash.Hash]int) chainArbCfg := ChainArbitratorConfig{ ChainIO: &mockChainIO{}, Notifier: &mockNotifier{}, PublishTx: func(tx *wire.MsgTx) error { published[tx.TxHash()]++ return nil }, Clock: clock.NewDefaultClock(), } chainArb := NewChainArbitrator( chainArbCfg, db, ) if err := chainArb.Start(); err != nil { t.Fatal(err) } defer func() { if err := chainArb.Stop(); err != nil { t.Fatal(err) } }() // Half of the channels should have had their closing tx re-published. if len(published) != numChans/2 { t.Fatalf("expected %d re-published transactions, got %d", numChans/2, len(published)) } // And make sure the published transactions are correct, and unique. for i := 0; i < numChans/2; i++ { closeTx := channels[i].FundingTxn.Copy() closeTx.TxIn[0].PreviousOutPoint = channels[i].FundingOutpoint count, ok := published[closeTx.TxHash()] if !ok { t.Fatalf("closing tx not re-published") } // We expect one coop close and one force close. if count != 2 { t.Fatalf("expected 2 closing txns, only got %d", count) } delete(published, closeTx.TxHash()) } if len(published) != 0 { t.Fatalf("unexpected tx published") } } // TestResolveContract tests that if we have an active channel being watched by // the chain arb, then a call to ResolveContract will mark the channel as fully // closed in the database, and also clean up all arbitrator state. func TestResolveContract(t *testing.T) { t.Parallel() // To start with, we'll create a new temp DB for the duration of this // test. tempPath, err := ioutil.TempDir("", "testdb") if err != nil { t.Fatalf("unable to make temp dir: %v", err) } defer os.RemoveAll(tempPath) db, err := channeldb.Open(tempPath) if err != nil { t.Fatalf("unable to open db: %v", err) } defer db.Close() // With the DB created, we'll make a new channel, and mark it as // pending open within the database. newChannel, _, cleanup, err := lnwallet.CreateTestChannels( channeldb.SingleFunderTweaklessBit, ) if err != nil { t.Fatalf("unable to make new test channel: %v", err) } defer cleanup() channel := newChannel.State() channel.Db = db addr := &net.TCPAddr{ IP: net.ParseIP("127.0.0.1"), Port: 18556, } if err := channel.SyncPending(addr, 101); err != nil { t.Fatalf("unable to write channel to db: %v", err) } // With the channel inserted into the database, we'll now create a new // chain arbitrator that should pick up these new channels and launch // resolver for them. chainArbCfg := ChainArbitratorConfig{ ChainIO: &mockChainIO{}, Notifier: &mockNotifier{}, PublishTx: func(tx *wire.MsgTx) error { return nil }, Clock: clock.NewDefaultClock(), } chainArb := NewChainArbitrator( chainArbCfg, db, ) if err := chainArb.Start(); err != nil { t.Fatal(err) } defer func() { if err := chainArb.Stop(); err != nil { t.Fatal(err) } }() channelArb := chainArb.activeChannels[channel.FundingOutpoint] // While the resolver are active, we'll now remove the channel from the // database (mark is as closed). err = db.AbandonChannel(&channel.FundingOutpoint, 4) if err != nil { t.Fatalf("unable to remove channel: %v", err) } // With the channel removed, we'll now manually call ResolveContract. // This stimulates needing to remove a channel from the chain arb due // to any possible external consistency issues. err = chainArb.ResolveContract(channel.FundingOutpoint) if err != nil { t.Fatalf("unable to resolve contract: %v", err) } // The shouldn't be an active chain watcher or channel arb for this // channel. if len(chainArb.activeChannels) != 0 { t.Fatalf("expected zero active channels, instead have %v", len(chainArb.activeChannels)) } if len(chainArb.activeWatchers) != 0 { t.Fatalf("expected zero active watchers, instead have %v", len(chainArb.activeWatchers)) } // At this point, the channel's arbitrator log should also be empty as // well. _, err = channelArb.log.FetchContractResolutions() if err != errScopeBucketNoExist { t.Fatalf("channel arb log state should have been "+ "removed: %v", err) } // If we attempt to call this method again, then we should get a nil // error, as there is no more state to be cleaned up. err = chainArb.ResolveContract(channel.FundingOutpoint) if err != nil { t.Fatalf("second resolve call shouldn't fail: %v", err) } }