package lnwallet import ( "bytes" "encoding/hex" "fmt" "io/ioutil" "os" "path/filepath" "testing" "time" "github.com/boltdb/bolt" "github.com/lightningnetwork/lnd/channeldb" "github.com/roasbeef/btcd/chaincfg" "github.com/roasbeef/btcutil/txsort" "github.com/roasbeef/btcd/btcec" "github.com/roasbeef/btcd/rpctest" "github.com/roasbeef/btcd/txscript" "github.com/roasbeef/btcd/wire" "github.com/roasbeef/btcutil" "github.com/roasbeef/btcutil/coinset" "github.com/roasbeef/btcwallet/waddrmgr" ) var ( privPass = []byte("private-test") // For simplicity a single priv key controls all of our test outputs. testWalletPrivKey = []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, } // We're alice :) 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, } // The number of confirmations required to consider any created channel // open. numReqConfs = uint16(1) ) // assertProperBalance asserts than the total value of the unspent outputs // within the wallet are *exactly* amount. If unable to retrieve the current // balance, or the assertion fails, the test will halt with a fatal error. func assertProperBalance(t *testing.T, lw *LightningWallet, numConfirms int32, amount int64) { balance, err := lw.CalculateBalance(numConfirms) if err != nil { t.Fatalf("unable to query for balance: %v", err) } if balance != btcutil.Amount(amount*1e8) { t.Fatalf("wallet credits not properly loaded, should have 40BTC, "+ "instead have %v", balance) } } func assertChannelOpen(t *testing.T, miner *rpctest.Harness, numConfs uint32, c <-chan *LightningChannel) *LightningChannel { // Mine a single block. After this block is mined, the channel should // be considered fully open. if _, err := miner.Node.Generate(1); err != nil { t.Fatalf("unable to generate block: %v", err) } select { case lnc := <-c: return lnc case <-time.After(time.Second * 5): t.Fatalf("channel never opened") return nil } return nil } // bobNode represents the other party involved as a node within LN. Bob is our // only "default-route", we have a direct connection with him. type bobNode struct { privKey *btcec.PrivateKey // For simplicity, used for both the commit tx and the multi-sig output. channelKey *btcec.PublicKey deliveryAddress btcutil.Address revocation [32]byte delay uint32 id [wire.HashSize]byte availableOutputs []*wire.TxIn changeOutputs []*wire.TxOut fundingAmt btcutil.Amount } // Contribution returns bobNode's contribution necessary to open a payment // channel with Alice. func (b *bobNode) Contribution(aliceCommitKey *btcec.PublicKey) *ChannelContribution { revokeKey := deriveRevocationPubkey(aliceCommitKey, b.revocation[:]) return &ChannelContribution{ FundingAmount: b.fundingAmt, Inputs: b.availableOutputs, ChangeOutputs: b.changeOutputs, MultiSigKey: b.channelKey, CommitKey: b.channelKey, DeliveryAddress: b.deliveryAddress, RevocationKey: revokeKey, CsvDelay: b.delay, } } // SingleContribution returns bobNode's contribution to a single funded // channel. This contribution contains no inputs nor change outputs. func (b *bobNode) SingleContribution(aliceCommitKey *btcec.PublicKey) *ChannelContribution { revokeKey := deriveRevocationPubkey(aliceCommitKey, b.revocation[:]) return &ChannelContribution{ FundingAmount: b.fundingAmt, MultiSigKey: b.channelKey, CommitKey: b.channelKey, DeliveryAddress: b.deliveryAddress, RevocationKey: revokeKey, CsvDelay: b.delay, } } // signFundingTx generates signatures for all the inputs in the funding tx // belonging to Bob. // NOTE: This generates the full witness stack. func (b *bobNode) signFundingTx(fundingTx *wire.MsgTx) ([]*InputScript, error) { bobInputScripts := make([]*InputScript, 0, len(b.availableOutputs)) bobPkScript := b.changeOutputs[0].PkScript inputValue := int64(7e8) hashCache := txscript.NewTxSigHashes(fundingTx) for i, _ := range fundingTx.TxIn { // Alice has already signed this input. if fundingTx.TxIn[i].Witness != nil { continue } witness, err := txscript.WitnessScript(fundingTx, hashCache, i, inputValue, bobPkScript, txscript.SigHashAll, b.privKey, true) if err != nil { return nil, err } inputScript := &InputScript{Witness: witness} bobInputScripts = append(bobInputScripts, inputScript) } return bobInputScripts, nil } // signCommitTx generates a raw signature required for generating a spend from // the funding transaction. func (b *bobNode) signCommitTx(commitTx *wire.MsgTx, fundingScript []byte, channelValue int64) ([]byte, error) { hashCache := txscript.NewTxSigHashes(commitTx) return txscript.RawTxInWitnessSignature(commitTx, hashCache, 0, channelValue, fundingScript, txscript.SigHashAll, b.privKey) } // newBobNode generates a test "ln node" to interact with Alice (us). For the // funding transaction, bob has a single output totaling 7BTC. For our basic // test, he'll fund the channel with 5BTC, leaving 2BTC to the change output. // TODO(roasbeef): proper handling of change etc. func newBobNode(miner *rpctest.Harness, amt btcutil.Amount) (*bobNode, error) { // First, parse Bob's priv key in order to obtain a key he'll use for the // multi-sig funding transaction. privKey, pubKey := btcec.PrivKeyFromBytes(btcec.S256(), bobsPrivKey) // Next, generate an output redeemable by bob. pkHash := btcutil.Hash160(pubKey.SerializeCompressed()) bobAddr, err := btcutil.NewAddressWitnessPubKeyHash( pkHash, miner.ActiveNet) if err != nil { return nil, err } bobAddrScript, err := txscript.PayToAddrScript(bobAddr) if err != nil { return nil, err } // Give bobNode one 7 BTC output for use in creating channels. output := &wire.TxOut{7e8, bobAddrScript} mainTxid, err := miner.CoinbaseSpend([]*wire.TxOut{output}) if err != nil { return nil, err } // Mine a block in order to include the above output in a block. During // the reservation workflow, we currently test to ensure that the funding // output we're given actually exists. if _, err := miner.Node.Generate(1); err != nil { return nil, err } // Grab the transaction in order to locate the output index to Bob. tx, err := miner.Node.GetRawTransaction(mainTxid) if err != nil { return nil, err } found, index := findScriptOutputIndex(tx.MsgTx(), bobAddrScript) if !found { return nil, fmt.Errorf("output to bob never created") } prevOut := wire.NewOutPoint(mainTxid, index) bobTxIn := wire.NewTxIn(prevOut, nil, nil) // Using bobs priv key above, create a change output he can spend. bobChangeOutput := wire.NewTxOut(2*1e8, bobAddrScript) // Bob's initial revocation hash is just his private key with the first // byte changed... var revocation [32]byte copy(revocation[:], bobsPrivKey) revocation[0] = 0xff // His ID is just as creative... var id [wire.HashSize]byte id[0] = 0xff return &bobNode{ id: id, privKey: privKey, channelKey: pubKey, deliveryAddress: bobAddr, revocation: revocation, fundingAmt: amt, delay: 5, availableOutputs: []*wire.TxIn{bobTxIn}, changeOutputs: []*wire.TxOut{bobChangeOutput}, }, nil } func loadTestCredits(miner *rpctest.Harness, w *LightningWallet, numOutputs, btcPerOutput int) error { // Using the mining node, spend from a coinbase output numOutputs to // give us btcPerOutput with each output. satoshiPerOutput := int64(btcPerOutput * 1e8) addrs := make([]btcutil.Address, 0, numOutputs) for i := 0; i < numOutputs; i++ { // Grab a fresh address from the wallet to house this output. walletAddr, err := w.NewAddress(waddrmgr.DefaultAccountNum, waddrmgr.WitnessPubKey) if err != nil { return err } script, err := txscript.PayToAddrScript(walletAddr) if err != nil { return err } addrs = append(addrs, walletAddr) output := &wire.TxOut{satoshiPerOutput, script} if _, err := miner.CoinbaseSpend([]*wire.TxOut{output}); err != nil { return err } } // TODO(roasbeef): shouldn't hardcode 10, use config param that dictates // how many confs we wait before opening a channel. // Generate 10 blocks with the mining node, this should mine all // numOutputs transactions created above. We generate 10 blocks here // in order to give all the outputs a "sufficient" number of confirmations. if _, err := miner.Node.Generate(10); err != nil { return err } _, bestHeight, err := miner.Node.GetBestBlock() if err != nil { return err } // Wait until the wallet has finished syncing up to the main chain. ticker := time.NewTicker(100 * time.Millisecond) out: for { select { case <-ticker.C: if w.Manager.SyncedTo().Height == bestHeight { break out } } } ticker.Stop() // Trigger a re-scan to ensure the wallet knows of the newly created // outputs it can spend. if err := w.Rescan(addrs, nil); err != nil { return err } return nil } // createTestWallet creates a test LightningWallet will a total of 20BTC // available for funding channels. func createTestWallet(miningNode *rpctest.Harness, netParams *chaincfg.Params) (string, *LightningWallet, error) { privPass := []byte("private-test") tempTestDir, err := ioutil.TempDir("", "lnwallet") if err != nil { return "", nil, nil } rpcConfig := miningNode.RPCConfig() config := &Config{ PrivatePass: privPass, HdSeed: testHdSeed[:], DataDir: tempTestDir, NetParams: netParams, RpcHost: rpcConfig.Host, RpcUser: rpcConfig.User, RpcPass: rpcConfig.Pass, CACert: rpcConfig.Certificates, } dbDir := filepath.Join(tempTestDir, "cdb") cdb, err := channeldb.Open(dbDir, &chaincfg.SegNet4Params) if err != nil { return "", nil, err } wallet, err := NewLightningWallet(config, cdb) if err != nil { return "", nil, err } if err := wallet.Startup(); err != nil { return "", nil, err } cdb.RegisterCryptoSystem(&WaddrmgrEncryptorDecryptor{wallet.Manager}) // Load our test wallet with 10 outputs each holding 4BTC. if err := loadTestCredits(miningNode, wallet, 10, 4); err != nil { return "", nil, err } return tempTestDir, wallet, nil } func testDualFundingReservationWorkflow(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { // Create the bob-test wallet which will be the other side of our funding // channel. fundingAmount := btcutil.Amount(5 * 1e8) bobNode, err := newBobNode(miner, fundingAmount) if err != nil { t.Fatalf("unable to create bob node: %v", err) } // Bob initiates a channel funded with 5 BTC for each side, so 10 // BTC total. He also generates 2 BTC in change. chanReservation, err := lnwallet.InitChannelReservation(fundingAmount*2, fundingAmount, bobNode.id, numReqConfs, 4) if err != nil { t.Fatalf("unable to initialize funding reservation: %v", err) } // The channel reservation should now be populated with a multi-sig key // from our HD chain, a change output with 3 BTC, and 2 outputs selected // of 4 BTC each. Additionally, the rest of the items needed to fufill a // funding contribution should also have been filled in. ourContribution := chanReservation.OurContribution() if len(ourContribution.Inputs) != 2 { t.Fatalf("outputs for funding tx not properly selected, have %v "+ "outputs should have 2", len(ourContribution.Inputs)) } if ourContribution.MultiSigKey == nil { t.Fatalf("alice's key for multi-sig not found") } if ourContribution.CommitKey == nil { t.Fatalf("alice's key for commit not found") } if ourContribution.DeliveryAddress == nil { t.Fatalf("alice's final delivery address not found") } if ourContribution.CsvDelay == 0 { t.Fatalf("csv delay not set") } // Bob sends over his output, change addr, pub keys, initial revocation, // final delivery address, and his accepted csv delay for the // commitment transactions. bobContribution := bobNode.Contribution(ourContribution.CommitKey) if err := chanReservation.ProcessContribution(bobContribution); err != nil { t.Fatalf("unable to add bob's funds to the funding tx: %v", err) } // At this point, the reservation should have our signatures, and a // partial funding transaction (missing bob's sigs). theirContribution := chanReservation.TheirContribution() ourFundingSigs, ourCommitSig := chanReservation.OurSignatures() if len(ourFundingSigs) != 2 { t.Fatalf("only %v of our sigs present, should have 2", len(ourFundingSigs)) } if ourCommitSig == nil { t.Fatalf("commitment sig not found") } if ourContribution.RevocationKey == nil { t.Fatalf("alice's revocation key not found") } // Additionally, the funding tx should have been populated. if chanReservation.fundingTx == nil { t.Fatalf("funding transaction never created!") } // Their funds should also be filled in. if len(theirContribution.Inputs) != 1 { t.Fatalf("bob's outputs for funding tx not properly selected, have %v "+ "outputs should have 2", len(theirContribution.Inputs)) } if theirContribution.ChangeOutputs[0].Value != 2e8 { t.Fatalf("bob should have one change output with value 2e8"+ "satoshis, is instead %v", theirContribution.ChangeOutputs[0].Value) } if theirContribution.MultiSigKey == nil { t.Fatalf("bob's key for multi-sig not found") } if theirContribution.CommitKey == nil { t.Fatalf("bob's key for commit tx not found") } if theirContribution.DeliveryAddress == nil { t.Fatalf("bob's final delivery address not found") } if theirContribution.RevocationKey == nil { t.Fatalf("bob's revocaiton key not found") } // Alice responds with her output, change addr, multi-sig key and signatures. // Bob then responds with his signatures. bobsSigs, err := bobNode.signFundingTx(chanReservation.fundingTx) if err != nil { t.Fatalf("unable to sign inputs for bob: %v", err) } commitSig, err := bobNode.signCommitTx( chanReservation.partialState.OurCommitTx, chanReservation.partialState.FundingRedeemScript, 10e8) if err != nil { t.Fatalf("bob is unable to sign alice's commit tx: %v", err) } if err := chanReservation.CompleteReservation(bobsSigs, commitSig); err != nil { t.Fatalf("unable to complete funding tx: %v", err) } // At this point, the channel can be considered "open" when the funding // txn hits a "comfortable" depth. // The resulting active channel state should have been persisted to the DB. fundingTx := chanReservation.FinalFundingTx() fundingSha := fundingTx.TxSha() nodeID := wire.ShaHash(bobNode.id) channels, err := lnwallet.channelDB.FetchOpenChannels(&nodeID) if err != nil { t.Fatalf("unable to retrieve channel from DB: %v", err) } if !bytes.Equal(channels[0].FundingOutpoint.Hash[:], fundingSha[:]) { t.Fatalf("channel state not properly saved") } // Assert that tha channel opens after a single block. lnc := assertChannelOpen(t, miner, uint32(numReqConfs), chanReservation.DispatchChan()) // Now that the channel is open, execute a cooperative closure of the // now open channel. aliceCloseSig, _, err := lnc.InitCooperativeClose() if err != nil { t.Fatalf("unable to init cooperative closure: %v", err) } // Obtain bob's signature for the closure transaction. redeemScript := lnc.channelState.FundingRedeemScript fundingOut := lnc.ChannelPoint() fundingTxIn := wire.NewTxIn(fundingOut, nil, nil) bobCloseTx := createCooperativeCloseTx(fundingTxIn, lnc.channelState.TheirBalance, lnc.channelState.OurBalance, lnc.channelState.TheirDeliveryScript, lnc.channelState.OurDeliveryScript, false) bobSig, err := bobNode.signCommitTx(bobCloseTx, redeemScript, int64(lnc.channelState.Capacity)) if err != nil { t.Fatalf("unable to generate bob's signature for closing tx: %v", err) } // Broadcast the transaction to the network. This transaction should // be accepted, and found in the next mined block. ourKey := lnc.channelState.OurMultiSigKey.PubKey().SerializeCompressed() theirKey := lnc.channelState.TheirMultiSigKey.SerializeCompressed() witness := spendMultiSig(redeemScript, ourKey, aliceCloseSig, theirKey, bobSig) bobCloseTx.TxIn[0].Witness = witness if err := lnwallet.PublishTransaction(bobCloseTx); err != nil { t.Fatalf("broadcast of close tx rejected: %v", err) } } func testFundingTransactionLockedOutputs(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { // Create two channels, both asking for 8 BTC each, totalling 16 // BTC. // TODO(roasbeef): tests for concurrent funding. // * also func for below fundingAmount := btcutil.Amount(8 * 1e8) chanReservation1, err := lnwallet.InitChannelReservation(fundingAmount, fundingAmount, testHdSeed, numReqConfs, 4) if err != nil { t.Fatalf("unable to initialize funding reservation 1: %v", err) } chanReservation2, err := lnwallet.InitChannelReservation(fundingAmount, fundingAmount, testHdSeed, numReqConfs, 4) if err != nil { t.Fatalf("unable to initialize funding reservation 2: %v", err) } ourContribution1 := chanReservation1.OurContribution() if len(ourContribution1.Inputs) != 3 { t.Fatalf("outputs for funding tx not properly selected, has %v "+ "outputs should have 3", len(ourContribution1.Inputs)) } if len(ourContribution1.ChangeOutputs) != 1 { t.Fatalf("funding transaction should have one change output, instead has %v", len(ourContribution1.ChangeOutputs)) } ourContribution2 := chanReservation2.OurContribution() if len(ourContribution2.Inputs) != 3 { t.Fatalf("outputs for funding tx not properly selected, have %v "+ "outputs should have 3", len(ourContribution2.Inputs)) } if len(ourContribution2.ChangeOutputs) != 1 { t.Fatalf("funding transaction should have one change, instead has %v", len(ourContribution2.ChangeOutputs)) } // Now attempt to reserve funds for another channel, this time requesting // 90 BTC. We only have around 24BTC worth of outpoints that aren't locked, so // this should fail. amt := btcutil.Amount(90 * 1e8) failedReservation, err := lnwallet.InitChannelReservation(amt, amt, testHdSeed, numReqConfs, 4) if err == nil { t.Fatalf("not error returned, should fail on coin selection") } if err != coinset.ErrCoinsNoSelectionAvailable { t.Fatalf("error not coinselect error: %v", err) } if failedReservation != nil { t.Fatalf("reservation should be nil") } } func testFundingCancellationNotEnoughFunds(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { // Create a reservation for 22 BTC. fundingAmount := btcutil.Amount(22 * 1e8) chanReservation, err := lnwallet.InitChannelReservation(fundingAmount, fundingAmount, testHdSeed, numReqConfs, 4) if err != nil { t.Fatalf("unable to initialize funding reservation: %v", err) } // There should be three locked outpoints. lockedOutPoints := lnwallet.LockedOutpoints() if len(lockedOutPoints) != 6 { t.Fatalf("two outpoints should now be locked, instead %v are", len(lockedOutPoints)) } // Attempt to create another channel with 22 BTC, this should fail. failedReservation, err := lnwallet.InitChannelReservation(fundingAmount, fundingAmount, testHdSeed, numReqConfs, 4) if err != coinset.ErrCoinsNoSelectionAvailable { t.Fatalf("coin selection succeded should have insufficient funds: %+v", failedReservation) } // Now cancel that old reservation. if err := chanReservation.Cancel(); err != nil { t.Fatalf("unable to cancel reservation: %v", err) } // Those outpoints should no longer be locked. lockedOutPoints = lnwallet.LockedOutpoints() if len(lockedOutPoints) != 0 { t.Fatalf("outpoints still locked") } // Reservation ID should now longer be tracked. _, ok := lnwallet.fundingLimbo[chanReservation.reservationID] if ok { t.Fatalf("funding reservation still in map") } // TODO(roasbeef): create method like Balance that ignores locked // outpoints, will let us fail early/fast instead of querying and // attempting coin selection. // Request to fund a new channel should now succeeed. _, err = lnwallet.InitChannelReservation(fundingAmount, fundingAmount, testHdSeed, numReqConfs, 4) if err != nil { t.Fatalf("unable to initialize funding reservation: %v", err) } } func testCancelNonExistantReservation(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { // Create our own reservation, give it some ID. res := newChannelReservation(1000, 1000, 5000, lnwallet, 22, numReqConfs) // Attempt to cancel this reservation. This should fail, we know // nothing of it. if err := res.Cancel(); err == nil { t.Fatalf("cancelled non-existant reservation") } } func testSingleFunderReservationWorkflowInitiator(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { // For this scenario, we (lnwallet) will be the channel initiator while bob // will be the recipient. // Create the bob-test wallet which will be the other side of our funding // channel. bobNode, err := newBobNode(miner, 0) if err != nil { t.Fatalf("unable to create bob node: %v", err) } // Initialize a reservation for a channel with 4 BTC funded solely by us. fundingAmt := btcutil.Amount(4 * 1e8) chanReservation, err := lnwallet.InitChannelReservation(fundingAmt, fundingAmt, bobNode.id, numReqConfs, 4) if err != nil { t.Fatalf("unable to init channel reservation: %v", err) } // Verify all contribution fields have been set properly. ourContribution := chanReservation.OurContribution() if len(ourContribution.Inputs) < 1 { t.Fatalf("outputs for funding tx not properly selected, have %v "+ "outputs should at least 1", len(ourContribution.Inputs)) } if len(ourContribution.ChangeOutputs) != 1 { t.Fatalf("coin selection failed, should have one change outputs, "+ "instead have: %v", len(ourContribution.ChangeOutputs)) } if ourContribution.MultiSigKey == nil { t.Fatalf("alice's key for multi-sig not found") } if ourContribution.CommitKey == nil { t.Fatalf("alice's key for commit not found") } if ourContribution.DeliveryAddress == nil { t.Fatalf("alice's final delivery address not found") } if ourContribution.CsvDelay == 0 { t.Fatalf("csv delay not set") } // At this point bob now responds to our request with a response // containing his channel contribution. The contribution will have no // inputs, only a multi-sig key, csv delay, etc. bobContribution := bobNode.SingleContribution(ourContribution.CommitKey) if err := chanReservation.ProcessContribution(bobContribution); err != nil { t.Fatalf("unable to add bob's contribution: %v", err) } // At this point, the reservation should have our signatures, and a // partial funding transaction (missing bob's sigs). theirContribution := chanReservation.TheirContribution() ourFundingSigs, ourCommitSig := chanReservation.OurSignatures() if len(ourFundingSigs) != 2 { t.Fatalf("only %v of our sigs present, should have 2", len(ourFundingSigs)) } if ourCommitSig == nil { t.Fatalf("commitment sig not found") } // Additionally, the funding tx should have been populated. if chanReservation.fundingTx == nil { t.Fatalf("funding transaction never created!") } // Their funds should also be filled in. if len(theirContribution.Inputs) != 0 { t.Fatalf("bob shouldn't have any inputs, instead has %v", len(theirContribution.Inputs)) } if len(theirContribution.ChangeOutputs) != 0 { t.Fatalf("bob shouldn't have any change outputs, instead "+ "has %v", theirContribution.ChangeOutputs[0].Value) } if ourContribution.RevocationKey == nil { t.Fatalf("alice's revocation hash not found") } if theirContribution.MultiSigKey == nil { t.Fatalf("bob's key for multi-sig not found") } if theirContribution.CommitKey == nil { t.Fatalf("bob's key for commit tx not found") } if theirContribution.DeliveryAddress == nil { t.Fatalf("bob's final delivery address not found") } if theirContribution.RevocationKey == nil { t.Fatalf("bob's revocaiton hash not found") } // With this contribution processed, we're able to create the // funding+commitment transactions, as well as generate a signature // for bob's version of the commitment transaction. // // Now Bob can generate a signature for our version of the commitment // transaction, allowing us to complete the reservation. bobCommitSig, err := bobNode.signCommitTx( chanReservation.partialState.OurCommitTx, chanReservation.partialState.FundingRedeemScript, int64(fundingAmt)) if err != nil { t.Fatalf("bob is unable to sign alice's commit tx: %v", err) } if err := chanReservation.CompleteReservation(nil, bobCommitSig); err != nil { t.Fatalf("unable to complete funding tx: %v", err) } // TODO(roasbeef): verify our sig for bob's once sighash change is // merged. // The resulting active channel state should have been persisted to the DB. // TODO(roasbeef): de-duplicate fundingTx := chanReservation.FinalFundingTx() fundingSha := fundingTx.TxSha() nodeID := wire.ShaHash(bobNode.id) channels, err := lnwallet.channelDB.FetchOpenChannels(&nodeID) if err != nil { t.Fatalf("unable to retrieve channel from DB: %v", err) } if !bytes.Equal(channels[0].FundingOutpoint.Hash[:], fundingSha[:]) { t.Fatalf("channel state not properly saved: %v vs %v", hex.EncodeToString(channels[0].FundingOutpoint.Hash[:]), hex.EncodeToString(fundingSha[:])) } assertChannelOpen(t, miner, uint32(numReqConfs), chanReservation.DispatchChan()) } func testSingleFunderReservationWorkflowResponder(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { // For this scenario, bob will initiate the channel, while we simply act as // the responder. capacity := btcutil.Amount(4 * 1e8) // Create the bob-test wallet which will be initiator of a single // funder channel shortly. bobNode, err := newBobNode(miner, capacity) if err != nil { t.Fatalf("unable to create bob node: %v", err) } // Bob sends over a single funding request, so we allocate our // contribution and the necessary resources. fundingAmt := btcutil.Amount(0) chanReservation, err := lnwallet.InitChannelReservation(capacity, fundingAmt, bobNode.id, numReqConfs, 4) if err != nil { t.Fatalf("unable to init channel reservation: %v", err) } // Verify all contribution fields have been set properly. Since we are // the recipient of a single-funder channel, we shouldn't have selected // any coins or generated any change outputs. ourContribution := chanReservation.OurContribution() if len(ourContribution.Inputs) != 0 { t.Fatalf("outputs for funding tx not properly selected, have %v "+ "outputs should have 0", len(ourContribution.Inputs)) } if len(ourContribution.ChangeOutputs) != 0 { t.Fatalf("coin selection failed, should have no change outputs, "+ "instead have: %v", ourContribution.ChangeOutputs[0].Value) } if ourContribution.MultiSigKey == nil { t.Fatalf("alice's key for multi-sig not found") } if ourContribution.CommitKey == nil { t.Fatalf("alice's key for commit not found") } if ourContribution.DeliveryAddress == nil { t.Fatalf("alice's final delivery address not found") } if ourContribution.CsvDelay == 0 { t.Fatalf("csv delay not set") } // Next we process Bob's single funder contribution which doesn't // include any inputs or change addresses, as only Bob will construct // the funding transaction. bobContribution := bobNode.Contribution(ourContribution.CommitKey) if err := chanReservation.ProcessSingleContribution(bobContribution); err != nil { t.Fatalf("unable to process bob's contribution: %v", err) } if chanReservation.fundingTx != nil { t.Fatalf("funding transaction populated!") } if len(bobContribution.Inputs) != 1 { t.Fatalf("bob shouldn't have one inputs, instead has %v", len(bobContribution.Inputs)) } if ourContribution.RevocationKey == nil { t.Fatalf("alice's revocation key not found") } if len(bobContribution.ChangeOutputs) != 1 { t.Fatalf("bob shouldn't have one change output, instead "+ "has %v", len(bobContribution.ChangeOutputs)) } if bobContribution.MultiSigKey == nil { t.Fatalf("bob's key for multi-sig not found") } if bobContribution.CommitKey == nil { t.Fatalf("bob's key for commit tx not found") } if bobContribution.DeliveryAddress == nil { t.Fatalf("bob's final delivery address not found") } if bobContribution.RevocationKey == nil { t.Fatalf("bob's revocaiton key not found") } fundingRedeemScript, multiOut, err := genFundingPkScript( ourContribution.MultiSigKey.SerializeCompressed(), bobContribution.MultiSigKey.SerializeCompressed(), int64(capacity)) if err != nil { t.Fatalf("unable to generate multi-sig output: %v", err) } // At this point, we send Bob our contribution, allowing him to // construct the funding transaction, and sign our version of the // commitment transaction. fundingTx := wire.NewMsgTx() fundingTx.AddTxIn(bobNode.availableOutputs[0]) fundingTx.AddTxOut(bobNode.changeOutputs[0]) fundingTx.AddTxOut(multiOut) txsort.InPlaceSort(fundingTx) if _, err := bobNode.signFundingTx(fundingTx); err != nil { t.Fatalf("unable to generate bob's funding sigs: %v", err) } // Locate the output index of the 2-of-2 in order to send back to the // wallet so it can finalize the transaction by signing bob's commitment // transaction. fundingTxID := fundingTx.TxSha() _, multiSigIndex := findScriptOutputIndex(fundingTx, multiOut.PkScript) fundingOutpoint := wire.NewOutPoint(&fundingTxID, multiSigIndex) fundingTxIn := wire.NewTxIn(fundingOutpoint, nil, nil) aliceCommitTx, err := createCommitTx(fundingTxIn, ourContribution.CommitKey, bobContribution.CommitKey, ourContribution.RevocationKey, ourContribution.CsvDelay, 0, capacity) if err != nil { t.Fatalf("unable to create alice's commit tx: %v", err) } txsort.InPlaceSort(aliceCommitTx) bobCommitSig, err := bobNode.signCommitTx(aliceCommitTx, fundingRedeemScript, int64(capacity)) if err != nil { t.Fatalf("unable to sign alice's commit tx: %v", err) } // With this stage complete, Alice can now complete the reservation. bobRevokeKey := bobContribution.RevocationKey if err := chanReservation.CompleteReservationSingle(bobRevokeKey, fundingOutpoint, bobCommitSig); err != nil { t.Fatalf("unable to complete reservation: %v", err) } // Alice should have saved the funding output. if chanReservation.partialState.FundingOutpoint != fundingOutpoint { t.Fatalf("funding outputs don't match: %#v vs %#v", chanReservation.partialState.FundingOutpoint, fundingOutpoint) } // Some period of time later, Bob presents us with an SPV proof // attesting to an open channel. At this point Alice recognizes the // channel, saves the state to disk, and creates the channel itself. if _, err := chanReservation.FinalizeReservation(); err != nil { t.Fatalf("unable to finalize reservation: %v", err) } // TODO(roasbeef): bob verify alice's sig } func testFundingReservationInvalidCounterpartySigs(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { } func testFundingTransactionTxFees(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) { } var walletTests = []func(miner *rpctest.Harness, w *LightningWallet, test *testing.T){ testDualFundingReservationWorkflow, testSingleFunderReservationWorkflowInitiator, testSingleFunderReservationWorkflowResponder, testFundingTransactionLockedOutputs, testFundingCancellationNotEnoughFunds, testFundingReservationInvalidCounterpartySigs, testFundingTransactionLockedOutputs, // TODO(roasbeef): // * test for non-existant output given in funding tx // * channel open after confirmations // * channel update stuff } type testLnWallet struct { lnwallet *LightningWallet cleanUpFunc func() } func clearWalletState(w *LightningWallet) error { w.nextFundingID = 0 w.fundingLimbo = make(map[uint64]*ChannelReservation) w.ResetLockedOutpoints() // TODO(roasbeef): should also restore outputs to original state. return w.channelDB.Wipe() } // TODO(roasbeef): purge bobNode in favor of dual lnwallet's func TestLightningWallet(t *testing.T) { netParams := &chaincfg.SimNetParams // Initialize the harness around a btcd node which will serve as our // dedicated miner to generate blocks, cause re-orgs, etc. We'll set // up this node with a chain length of 125, so we have plentyyy of BTC // to play around with. miningNode, err := rpctest.New(netParams, nil, nil) defer miningNode.TearDown() if err != nil { t.Fatalf("unable to create mining node: %v", err) } if err := miningNode.SetUp(true, 25); err != nil { t.Fatalf("unable to set up mining node: %v", err) } // Funding via 10 outputs with 4BTC each. testDir, lnwallet, err := createTestWallet(miningNode, netParams) if err != nil { t.Fatalf("unable to create test ln wallet: %v", err) } defer os.RemoveAll(testDir) defer lnwallet.Shutdown() // The wallet should now have 40BTC available for spending. assertProperBalance(t, lnwallet, 1, 40) // Execute every test, clearing possibly mutated wallet state after // each step. for _, walletTest := range walletTests { walletTest(miningNode, lnwallet, t) // TODO(roasbeef): possible reset mining node's chainstate to // initial level, cleanly wipe buckets if err := clearWalletState(lnwallet); err != nil && err != bolt.ErrBucketNotFound { t.Fatalf("unable to wipe wallet state: %v", err) } } }