package main import ( "bytes" "io/ioutil" "math/rand" "net" "os" "github.com/lightningnetwork/lnd/chainntnfs" "github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/htlcswitch" "github.com/lightningnetwork/lnd/lnwallet" "github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/shachain" "github.com/roasbeef/btcd/btcec" "github.com/roasbeef/btcd/chaincfg/chainhash" "github.com/roasbeef/btcd/wire" "github.com/roasbeef/btcutil" ) var ( alicesPrivKey = []byte{ 0x2b, 0xd8, 0x06, 0xc9, 0x7f, 0x0e, 0x00, 0xaf, 0x1a, 0x1f, 0xc3, 0x32, 0x8f, 0xa7, 0x63, 0xa9, 0x26, 0x97, 0x23, 0xc8, 0xdb, 0x8f, 0xac, 0x4f, 0x93, 0xaf, 0x71, 0xdb, 0x18, 0x6d, 0x6e, 0x90, } bobsPrivKey = []byte{ 0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda, 0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17, 0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d, 0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9, } // Use a hard-coded HD seed. testHdSeed = [32]byte{ 0xb7, 0x94, 0x38, 0x5f, 0x2d, 0x1e, 0xf7, 0xab, 0x4d, 0x92, 0x73, 0xd1, 0x90, 0x63, 0x81, 0xb4, 0x4f, 0x2f, 0x6f, 0x25, 0x88, 0xa3, 0xef, 0xb9, 0x6a, 0x49, 0x18, 0x83, 0x31, 0x98, 0x47, 0x53, } // Just use some arbitrary bytes as delivery script. dummyDeliveryScript = alicesPrivKey[:] ) // createTestPeer creates a channel between two nodes, and returns a peer for // one of the nodes, together with the channel seen from both nodes. func createTestPeer(notifier chainntnfs.ChainNotifier, publTx chan *wire.MsgTx) (*peer, *lnwallet.LightningChannel, *lnwallet.LightningChannel, func(), error) { aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(btcec.S256(), alicesPrivKey) bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(btcec.S256(), bobsPrivKey) channelCapacity := btcutil.Amount(10 * 1e8) channelBal := channelCapacity / 2 aliceDustLimit := btcutil.Amount(200) bobDustLimit := btcutil.Amount(1300) csvTimeoutAlice := uint32(5) csvTimeoutBob := uint32(4) prevOut := &wire.OutPoint{ Hash: chainhash.Hash(testHdSeed), Index: 0, } fundingTxIn := wire.NewTxIn(prevOut, nil, nil) aliceCfg := channeldb.ChannelConfig{ ChannelConstraints: channeldb.ChannelConstraints{ DustLimit: aliceDustLimit, MaxPendingAmount: lnwire.MilliSatoshi(rand.Int63()), ChanReserve: btcutil.Amount(rand.Int63()), MinHTLC: lnwire.MilliSatoshi(rand.Int63()), MaxAcceptedHtlcs: uint16(rand.Int31()), }, CsvDelay: uint16(csvTimeoutAlice), MultiSigKey: aliceKeyPub, RevocationBasePoint: aliceKeyPub, PaymentBasePoint: aliceKeyPub, DelayBasePoint: aliceKeyPub, } bobCfg := channeldb.ChannelConfig{ ChannelConstraints: channeldb.ChannelConstraints{ DustLimit: bobDustLimit, MaxPendingAmount: lnwire.MilliSatoshi(rand.Int63()), ChanReserve: btcutil.Amount(rand.Int63()), MinHTLC: lnwire.MilliSatoshi(rand.Int63()), MaxAcceptedHtlcs: uint16(rand.Int31()), }, CsvDelay: uint16(csvTimeoutBob), MultiSigKey: bobKeyPub, RevocationBasePoint: bobKeyPub, PaymentBasePoint: bobKeyPub, DelayBasePoint: bobKeyPub, } bobRoot := lnwallet.DeriveRevocationRoot(bobKeyPriv, testHdSeed, aliceKeyPub) bobPreimageProducer := shachain.NewRevocationProducer(bobRoot) bobFirstRevoke, err := bobPreimageProducer.AtIndex(0) if err != nil { return nil, nil, nil, nil, err } bobCommitPoint := lnwallet.ComputeCommitmentPoint(bobFirstRevoke[:]) aliceRoot := lnwallet.DeriveRevocationRoot(aliceKeyPriv, testHdSeed, bobKeyPub) alicePreimageProducer := shachain.NewRevocationProducer(aliceRoot) aliceFirstRevoke, err := alicePreimageProducer.AtIndex(0) if err != nil { return nil, nil, nil, nil, err } aliceCommitPoint := lnwallet.ComputeCommitmentPoint(aliceFirstRevoke[:]) aliceCommitTx, bobCommitTx, err := lnwallet.CreateCommitmentTxns(channelBal, channelBal, &aliceCfg, &bobCfg, aliceCommitPoint, bobCommitPoint, fundingTxIn) if err != nil { return nil, nil, nil, nil, err } alicePath, err := ioutil.TempDir("", "alicedb") dbAlice, err := channeldb.Open(alicePath) if err != nil { return nil, nil, nil, nil, err } bobPath, err := ioutil.TempDir("", "bobdb") dbBob, err := channeldb.Open(bobPath) if err != nil { return nil, nil, nil, nil, err } var obsfucator [lnwallet.StateHintSize]byte copy(obsfucator[:], aliceFirstRevoke[:]) estimator := &lnwallet.StaticFeeEstimator{FeeRate: 50} feePerKw := btcutil.Amount(estimator.EstimateFeePerWeight(1) * 1000) aliceChannelState := &channeldb.OpenChannel{ LocalChanCfg: aliceCfg, RemoteChanCfg: bobCfg, IdentityPub: aliceKeyPub, FundingOutpoint: *prevOut, ChanType: channeldb.SingleFunder, FeePerKw: feePerKw, IsInitiator: true, Capacity: channelCapacity, LocalBalance: lnwire.NewMSatFromSatoshis(channelBal), RemoteBalance: lnwire.NewMSatFromSatoshis(channelBal), CommitTx: *aliceCommitTx, CommitSig: bytes.Repeat([]byte{1}, 71), RemoteCurrentRevocation: bobCommitPoint, RevocationProducer: alicePreimageProducer, RevocationStore: shachain.NewRevocationStore(), Db: dbAlice, } addr := &net.TCPAddr{ IP: net.ParseIP("127.0.0.1"), Port: 18555, } if err := aliceChannelState.SyncPending(addr, 0); err != nil { return nil, nil, nil, nil, err } bobChannelState := &channeldb.OpenChannel{ LocalChanCfg: bobCfg, RemoteChanCfg: aliceCfg, IdentityPub: bobKeyPub, FeePerKw: feePerKw, FundingOutpoint: *prevOut, ChanType: channeldb.SingleFunder, IsInitiator: false, Capacity: channelCapacity, LocalBalance: lnwire.NewMSatFromSatoshis(channelBal), RemoteBalance: lnwire.NewMSatFromSatoshis(channelBal), CommitTx: *bobCommitTx, CommitSig: bytes.Repeat([]byte{1}, 71), RemoteCurrentRevocation: aliceCommitPoint, RevocationProducer: bobPreimageProducer, RevocationStore: shachain.NewRevocationStore(), Db: dbBob, } addr = &net.TCPAddr{ IP: net.ParseIP("127.0.0.1"), Port: 18556, } if err := bobChannelState.SyncPending(addr, 0); err != nil { return nil, nil, nil, nil, err } cleanUpFunc := func() { os.RemoveAll(bobPath) os.RemoveAll(alicePath) } aliceSigner := &mockSigner{aliceKeyPriv} bobSigner := &mockSigner{bobKeyPriv} channelAlice, err := lnwallet.NewLightningChannel(aliceSigner, notifier, estimator, aliceChannelState) if err != nil { return nil, nil, nil, nil, err } channelBob, err := lnwallet.NewLightningChannel(bobSigner, notifier, estimator, bobChannelState) if err != nil { return nil, nil, nil, nil, err } chainIO := &mockChainIO{} wallet := &lnwallet.LightningWallet{ WalletController: &mockWalletController{ rootKey: aliceKeyPriv, publishedTransactions: publTx, }, } cc := &chainControl{ feeEstimator: estimator, chainIO: chainIO, chainNotifier: notifier, wallet: wallet, } breachArbiter := &breachArbiter{ settledContracts: make(chan *wire.OutPoint, 10), } s := &server{ chanDB: dbAlice, cc: cc, breachArbiter: breachArbiter, } s.htlcSwitch = htlcswitch.New(htlcswitch.Config{}) s.htlcSwitch.Start() alicePeer := &peer{ server: s, sendQueue: make(chan outgoinMsg, 1), outgoingQueue: make(chan outgoinMsg, outgoingQueueLen), activeChannels: make(map[lnwire.ChannelID]*lnwallet.LightningChannel), newChannels: make(chan *newChannelMsg, 1), localCloseChanReqs: make(chan *htlcswitch.ChanClose), shutdownChanReqs: make(chan *lnwire.Shutdown), closingSignedChanReqs: make(chan *lnwire.ClosingSigned), queueQuit: make(chan struct{}), quit: make(chan struct{}), } chanID := lnwire.NewChanIDFromOutPoint(channelAlice.ChannelPoint()) alicePeer.activeChannels[chanID] = channelAlice go alicePeer.channelManager() return alicePeer, channelAlice, channelBob, cleanUpFunc, nil }