lnd.xprv/lnwallet/interface_test.go

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package lnwallet_test
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import (
"bytes"
"encoding/hex"
"fmt"
"io/ioutil"
"net"
"os"
"path/filepath"
"testing"
"time"
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"github.com/boltdb/bolt"
"github.com/lightningnetwork/lnd/chainntnfs"
"github.com/lightningnetwork/lnd/chainntnfs/btcdnotify"
"github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwallet/btcwallet"
"github.com/roasbeef/btcd/chaincfg"
"github.com/roasbeef/btcd/chaincfg/chainhash"
"github.com/roasbeef/btcutil/txsort"
_ "github.com/roasbeef/btcwallet/walletdb/bdb"
"github.com/roasbeef/btcd/btcec"
"github.com/roasbeef/btcd/rpctest"
"github.com/roasbeef/btcd/txscript"
"github.com/roasbeef/btcd/wire"
"github.com/roasbeef/btcutil"
)
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,
}
_, testPub = btcec.PrivKeyFromBytes(btcec.S256(), testHdSeed[:])
// The number of confirmations required to consider any created channel
// open.
numReqConfs = uint16(1)
bobAddr, _ = net.ResolveTCPAddr("tcp", "10.0.0.2:9000")
)
// 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 *lnwallet.LightningWallet, numConfirms int32, amount int64) {
balance, err := lw.ConfirmedBalance(numConfirms, false)
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 *lnwallet.LightningChannel) *lnwallet.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
}
}
func assertReservationDeleted(res *lnwallet.ChannelReservation, t *testing.T) {
if err := res.Cancel(); err == nil {
t.Fatalf("reservation wasn't deleted from wallet")
}
}
// 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 *btcec.PublicKey
obsfucator [lnwallet.StateHintSize]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) *lnwallet.ChannelContribution {
revokeKey := lnwallet.DeriveRevocationPubkey(aliceCommitKey, b.revocation[:])
return &lnwallet.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) *lnwallet.ChannelContribution {
revokeKey := lnwallet.DeriveRevocationPubkey(aliceCommitKey, b.revocation[:])
return &lnwallet.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) ([]*lnwallet.InputScript, error) {
bobInputScripts := make([]*lnwallet.InputScript, 0, len(b.availableOutputs))
bobPkScript := b.changeOutputs[0].PkScript
inputValue := int64(7e8)
hashCache := txscript.NewTxSigHashes(fundingTx)
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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 := &lnwallet.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{
Value: 7e8,
PkScript: bobAddrScript,
}
mainTxid, err := miner.SendOutputs([]*wire.TxOut{output}, 10)
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 := lnwallet.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
var obsfucator [lnwallet.StateHintSize]byte
copy(obsfucator[:], revocation[:])
// His ID is just as creative...
var id [chainhash.HashSize]byte
id[0] = 0xff
return &bobNode{
id: pubKey,
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 *lnwallet.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(lnwallet.WitnessPubKey, false)
if err != nil {
return err
}
script, err := txscript.PayToAddrScript(walletAddr)
if err != nil {
return err
}
addrs = append(addrs, walletAddr)
output := &wire.TxOut{
Value: satoshiPerOutput,
PkScript: script,
}
if _, err := miner.SendOutputs([]*wire.TxOut{output}, 10); 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
}
// Wait until the wallet has finished syncing up to the main chain.
ticker := time.NewTicker(100 * time.Millisecond)
expectedBalance := btcutil.Amount(satoshiPerOutput * int64(numOutputs))
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for range ticker.C {
balance, err := w.ConfirmedBalance(1, false)
if err != nil {
return err
}
if balance == expectedBalance {
break
}
}
ticker.Stop()
return nil
}
// createTestWallet creates a test LightningWallet will a total of 20BTC
// available for funding channels.
func createTestWallet(tempTestDir string, miningNode *rpctest.Harness,
netParams *chaincfg.Params, notifier chainntnfs.ChainNotifier,
wc lnwallet.WalletController, signer lnwallet.Signer,
bio lnwallet.BlockChainIO) (*lnwallet.LightningWallet, error) {
dbDir := filepath.Join(tempTestDir, "cdb")
cdb, err := channeldb.Open(dbDir)
if err != nil {
return nil, err
}
wallet, err := lnwallet.NewLightningWallet(cdb, notifier, wc, signer,
bio, netParams)
if err != nil {
return nil, err
}
if err := wallet.Startup(); err != nil {
return nil, err
}
// Load our test wallet with 20 outputs each holding 4BTC.
if err := loadTestCredits(miningNode, wallet, 20, 4); err != nil {
return nil, err
}
return wallet, nil
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}
func testDualFundingReservationWorkflow(miner *rpctest.Harness, wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running dual reservation workflow test")
// 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 := wallet.InitChannelReservation(fundingAmount*2,
fundingAmount, bobNode.id, bobAddr, numReqConfs, 4,
lnwallet.DefaultDustLimit(), 0)
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 fulfill 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")
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}
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.
fundingTx := chanReservation.FinalFundingTx()
if 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 {
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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")
}
// TODO(roasbeef): account for current hard-coded commit fee,
// need to remove bob all together
chanCapacity := int64(10e8 + 5000)
// Alice responds with her output, change addr, multi-sig key and signatures.
// Bob then responds with his signatures.
bobsSigs, err := bobNode.signFundingTx(fundingTx)
if err != nil {
t.Fatalf("unable to sign inputs for bob: %v", err)
}
commitSig, err := bobNode.signCommitTx(
chanReservation.LocalCommitTx(),
chanReservation.FundingRedeemScript(),
chanCapacity)
if err != nil {
t.Fatalf("bob is unable to sign alice's commit tx: %v", err)
}
_, err = chanReservation.CompleteReservation(bobsSigs, commitSig)
if err != nil {
t.Fatalf("unable to complete funding tx: %v", err)
}
// The resulting active channel state should have been persisted to the DB.
fundingSha := fundingTx.TxHash()
channels, err := wallet.ChannelDB.FetchOpenChannels(bobNode.id)
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if err != nil {
t.Fatalf("unable to retrieve channel from DB: %v", err)
}
if !bytes.Equal(channels[0].FundingOutpoint.Hash[:], fundingSha[:]) {
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t.Fatalf("channel state not properly saved")
}
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}
func testFundingTransactionLockedOutputs(miner *rpctest.Harness,
wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running funding txn locked outputs test")
// Create a single channel asking for 16 BTC total.
fundingAmount := btcutil.Amount(8 * 1e8)
_, err := wallet.InitChannelReservation(fundingAmount, fundingAmount,
testPub, bobAddr, numReqConfs, 4, lnwallet.DefaultDustLimit(), 0)
if err != nil {
t.Fatalf("unable to initialize funding reservation 1: %v", err)
}
// Now attempt to reserve funds for another channel, this time
// requesting 900 BTC. We only have around 64BTC worth of outpoints
// that aren't locked, so this should fail.
amt := btcutil.Amount(900 * 1e8)
failedReservation, err := wallet.InitChannelReservation(amt, amt,
testPub, bobAddr, numReqConfs, 4, lnwallet.DefaultDustLimit(), 0)
if err == nil {
t.Fatalf("not error returned, should fail on coin selection")
}
if _, ok := err.(*lnwallet.ErrInsufficientFunds); !ok {
t.Fatalf("error not coinselect error: %v", err)
}
if failedReservation != nil {
t.Fatalf("reservation should be nil")
}
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}
func testFundingCancellationNotEnoughFunds(miner *rpctest.Harness,
wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running funding insufficient funds tests")
// Create a reservation for 44 BTC.
fundingAmount := btcutil.Amount(44 * 1e8)
chanReservation, err := wallet.InitChannelReservation(fundingAmount,
fundingAmount, testPub, bobAddr, numReqConfs, 4,
lnwallet.DefaultDustLimit(), 0)
if err != nil {
t.Fatalf("unable to initialize funding reservation: %v", err)
}
// Attempt to create another channel with 44 BTC, this should fail.
_, err = wallet.InitChannelReservation(fundingAmount,
fundingAmount, testPub, bobAddr, numReqConfs, 4,
lnwallet.DefaultDustLimit(), 0)
if _, ok := err.(*lnwallet.ErrInsufficientFunds); !ok {
t.Fatalf("coin selection succeded should have insufficient funds: %v",
err)
}
// 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 := wallet.LockedOutpoints()
if len(lockedOutPoints) != 0 {
t.Fatalf("outpoints still locked")
}
// Reservation ID should no longer be tracked.
numReservations := wallet.ActiveReservations()
if len(wallet.ActiveReservations()) != 0 {
t.Fatalf("should have 0 reservations, instead have %v",
numReservations)
}
// 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 succeed.
_, err = wallet.InitChannelReservation(fundingAmount, fundingAmount,
testPub, bobAddr, numReqConfs, 4, lnwallet.DefaultDustLimit(), 0)
if err != nil {
t.Fatalf("unable to initialize funding reservation: %v", err)
}
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}
func testCancelNonExistantReservation(miner *rpctest.Harness,
wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running cancel reservation tests")
// Create our own reservation, give it some ID.
res := lnwallet.NewChannelReservation(1000, 1000, 5000, wallet, 22,
numReqConfs, 10)
// Attempt to cancel this reservation. This should fail, we know
// nothing of it.
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if err := res.Cancel(); err == nil {
t.Fatalf("cancelled non-existant reservation")
}
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}
func testSingleFunderReservationWorkflowInitiator(miner *rpctest.Harness,
wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running single funder workflow initiator test")
// 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. We'll also initially push 1 BTC of the channel towards Bob's
// side.
fundingAmt := btcutil.Amount(4 * 1e8)
pushAmt := btcutil.Amount(btcutil.SatoshiPerBitcoin)
chanReservation, err := wallet.InitChannelReservation(fundingAmt,
fundingAmt, bobNode.id, bobAddr, numReqConfs, 4,
lnwallet.DefaultDustLimit(), pushAmt)
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 ourFundingSigs == nil {
t.Fatalf("funding sigs not found")
}
if ourCommitSig == nil {
t.Fatalf("commitment sig not found")
}
// Additionally, the funding tx should have been populated.
if chanReservation.FinalFundingTx() == 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 revocation 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.LocalCommitTx(),
chanReservation.FundingRedeemScript(),
// TODO(roasbeef): account for current hard-coded fee, need to
// remove bobNode entirely
int64(fundingAmt)+5000)
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.TxHash()
channels, err := wallet.ChannelDB.FetchOpenChannels(bobNode.id)
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[:]))
}
if !channels[0].IsInitiator {
t.Fatalf("alice not detected as channel initiator")
}
if channels[0].ChanType != channeldb.SingleFunder {
t.Fatalf("channel type is incorrect, expected %v instead got %v",
channeldb.SingleFunder, channels[0].ChanType)
}
assertReservationDeleted(chanReservation, t)
}
func testSingleFunderReservationWorkflowResponder(miner *rpctest.Harness,
wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running single funder workflow responder test")
// 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 := wallet.InitChannelReservation(capacity,
fundingAmt, bobNode.id, bobAddr, numReqConfs, 4,
lnwallet.DefaultDustLimit(), 0)
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.FinalFundingTx() != 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 := lnwallet.GenFundingPkScript(
ourContribution.MultiSigKey.SerializeCompressed(),
bobContribution.MultiSigKey.SerializeCompressed(),
// TODO(roasbeef): account for hard-coded fee, remove bob node
int64(capacity)+5000)
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(1)
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.TxHash()
_, multiSigIndex := lnwallet.FindScriptOutputIndex(fundingTx, multiOut.PkScript)
fundingOutpoint := wire.NewOutPoint(&fundingTxID, multiSigIndex)
bobObsfucator := bobNode.obsfucator
// Next, manually create Alice's commitment transaction, signing the
// fully sorted and state hinted transaction.
fundingTxIn := wire.NewTxIn(fundingOutpoint, nil, nil)
aliceCommitTx, err := lnwallet.CreateCommitTx(fundingTxIn,
ourContribution.CommitKey, bobContribution.CommitKey,
ourContribution.RevocationKey, ourContribution.CsvDelay, 0,
capacity, lnwallet.DefaultDustLimit())
if err != nil {
t.Fatalf("unable to create alice's commit tx: %v", err)
}
txsort.InPlaceSort(aliceCommitTx)
err = lnwallet.SetStateNumHint(aliceCommitTx, 0, bobObsfucator)
if err != nil {
t.Fatalf("unable to set state hint: %v", err)
}
bobCommitSig, err := bobNode.signCommitTx(aliceCommitTx,
// TODO(roasbeef): account for hard-coded fee, remove bob node
fundingRedeemScript, int64(capacity)+5000)
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
_, err = chanReservation.CompleteReservationSingle(bobRevokeKey,
fundingOutpoint, bobCommitSig, bobObsfucator)
if err != nil {
t.Fatalf("unable to complete reservation: %v", err)
}
// Alice should have saved the funding output.
if chanReservation.FundingOutpoint() != fundingOutpoint {
t.Fatalf("funding outputs don't match: %#v vs %#v",
chanReservation.FundingOutpoint(), fundingOutpoint)
}
// TODO(roasbeef): bob verify alice's sig
assertReservationDeleted(chanReservation, t)
}
func testListTransactionDetails(miner *rpctest.Harness, wallet *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running list transaction details test")
// Create 5 new outputs spendable by the wallet.
const numTxns = 5
const outputAmt = btcutil.SatoshiPerBitcoin
txids := make(map[chainhash.Hash]struct{})
for i := 0; i < numTxns; i++ {
addr, err := wallet.NewAddress(lnwallet.WitnessPubKey, false)
if err != nil {
t.Fatalf("unable to create new address: %v", err)
}
script, err := txscript.PayToAddrScript(addr)
if err != nil {
t.Fatalf("unable to create output script: %v", err)
}
output := &wire.TxOut{
Value: outputAmt,
PkScript: script,
}
txid, err := miner.SendOutputs([]*wire.TxOut{output}, 10)
if err != nil {
t.Fatalf("unable to send coinbase: %v", err)
}
txids[*txid] = struct{}{}
}
// Generate 10 blocks to mine all the transactions created above.
const numBlocksMined = 10
blocks, err := miner.Node.Generate(numBlocksMined)
if err != nil {
t.Fatalf("unable to mine blocks: %v", err)
}
// Next, fetch all the current transaction details.
// TODO(roasbeef): use ntfn client here instead?
time.Sleep(time.Second * 2)
txDetails, err := wallet.ListTransactionDetails()
if err != nil {
t.Fatalf("unable to fetch tx details: %v", err)
}
// Each of the transactions created above should be found with the
// proper details populated.
for _, txDetail := range txDetails {
if _, ok := txids[txDetail.Hash]; !ok {
continue
}
if txDetail.NumConfirmations != numBlocksMined {
t.Fatalf("num confs incorrect, got %v expected %v",
txDetail.NumConfirmations, numBlocksMined)
}
if txDetail.Value != outputAmt {
t.Fatalf("tx value incorrect, got %v expected %v",
txDetail.Value, outputAmt)
}
if !bytes.Equal(txDetail.BlockHash[:], blocks[0][:]) {
t.Fatalf("block hash mismatch, got %v expected %v",
txDetail.BlockHash, blocks[0])
}
delete(txids, txDetail.Hash)
}
if len(txids) != 0 {
t.Fatalf("all transactions not found in details!")
}
// Next create a transaction paying to an output which isn't under the
// wallet's control.
b := txscript.NewScriptBuilder()
b.AddOp(txscript.OP_0)
outputScript, err := b.Script()
if err != nil {
t.Fatalf("unable to make output script: %v", err)
}
burnOutput := wire.NewTxOut(outputAmt, outputScript)
burnTXID, err := wallet.SendOutputs([]*wire.TxOut{burnOutput})
if err != nil {
t.Fatalf("unable to create burn tx: %v", err)
}
burnBlock, err := miner.Node.Generate(1)
if err != nil {
t.Fatalf("unable to mine block: %v", err)
}
// Fetch the transaction details again, the new transaction should be
// shown as debiting from the wallet's balance.
time.Sleep(time.Second * 2)
txDetails, err = wallet.ListTransactionDetails()
if err != nil {
t.Fatalf("unable to fetch tx details: %v", err)
}
var burnTxFound bool
for _, txDetail := range txDetails {
if !bytes.Equal(txDetail.Hash[:], burnTXID[:]) {
continue
}
burnTxFound = true
if txDetail.NumConfirmations != 1 {
t.Fatalf("num confs incorrect, got %v expected %v",
txDetail.NumConfirmations, 1)
}
if txDetail.Value >= -outputAmt {
t.Fatalf("tx value incorrect, got %v expected %v",
txDetail.Value, -outputAmt)
}
if !bytes.Equal(txDetail.BlockHash[:], burnBlock[0][:]) {
t.Fatalf("block hash mismatch, got %v expected %v",
txDetail.BlockHash, burnBlock[0])
}
}
if !burnTxFound {
t.Fatal("tx burning btc not found")
}
}
func testTransactionSubscriptions(miner *rpctest.Harness, w *lnwallet.LightningWallet, t *testing.T) {
t.Log("Running transaction subscriptions test")
// First, check to see if this wallet meets the TransactionNotifier
// interface, if not then we'll skip this test for this particular
// implementation of the WalletController.
txClient, err := w.SubscribeTransactions()
if err != nil {
t.Fatalf("unable to generate tx subscription: %v", err)
}
defer txClient.Cancel()
const (
outputAmt = btcutil.SatoshiPerBitcoin
numTxns = 3
)
unconfirmedNtfns := make(chan struct{})
go func() {
for i := 0; i < numTxns; i++ {
txDetail := <-txClient.UnconfirmedTransactions()
if txDetail.NumConfirmations != 0 {
t.Fatalf("incorrect number of confs, expected %v got %v",
0, txDetail.NumConfirmations)
}
if txDetail.Value != outputAmt {
t.Fatalf("incorrect output amt, expected %v got %v",
outputAmt, txDetail.Value)
}
if txDetail.BlockHash != nil {
t.Fatalf("block hash should be nil, is instead %v",
txDetail.BlockHash)
}
}
close(unconfirmedNtfns)
}()
// Next, fetch a fresh address from the wallet, create 3 new outputs
// with the pkScript.
for i := 0; i < numTxns; i++ {
addr, err := w.NewAddress(lnwallet.WitnessPubKey, false)
if err != nil {
t.Fatalf("unable to create new address: %v", err)
}
script, err := txscript.PayToAddrScript(addr)
if err != nil {
t.Fatalf("unable to create output script: %v", err)
}
output := &wire.TxOut{
Value: outputAmt,
PkScript: script,
}
if _, err := miner.SendOutputs([]*wire.TxOut{output}, 10); err != nil {
t.Fatalf("unable to send coinbase: %v", err)
}
}
// We should receive a notification for all three transactions
// generated above.
select {
case <-time.After(time.Second * 5):
t.Fatalf("transactions not received after 3 seconds")
case <-unconfirmedNtfns: // Fall through on successs
}
confirmedNtfns := make(chan struct{})
go func() {
for i := 0; i < numTxns; i++ {
txDetail := <-txClient.ConfirmedTransactions()
if txDetail.NumConfirmations != 1 {
t.Fatalf("incorrect number of confs, expected %v got %v",
1, txDetail.NumConfirmations)
}
if txDetail.Value != outputAmt {
t.Fatalf("incorrect output amt, expected %v got %v",
outputAmt, txDetail.Value)
}
}
close(confirmedNtfns)
}()
// Next mine a single block, all the transactions generated above
// should be included.
if _, err := miner.Node.Generate(1); err != nil {
t.Fatalf("unable to generate block: %v", err)
}
// We should receive a notification for all three transactions
// since they should be mined in the next block.
select {
case <-time.After(time.Second * 5):
t.Fatalf("transactions not received after 3 seconds")
case <-confirmedNtfns: // Fall through on success
}
}
func testSignOutputPrivateTweak(r *rpctest.Harness, w *lnwallet.LightningWallet, t *testing.T) {
t.Logf("Running private tweak test")
// We'd like to test the ability of the wallet's Signer implementation
// to be able to sign with a private key derived from tweaking the
// specific public key. This scenario exercises the case when the
// wallet needs to sign for a sweep of a revoked output.
// First, generate a new public key under th control of the wallet,
// then generate a revocation key using it.
pubkey, err := w.NewRawKey()
if err != nil {
t.Fatalf("unable to obtain public key: %v", err)
}
revocation := bytes.Repeat([]byte{2}, 32)
revocationKey := lnwallet.DeriveRevocationPubkey(pubkey, revocation)
// With the revocation key generated, create a pkScript that pays to
// the revocation key using a simple p2wkh script.
pubkeyHash := btcutil.Hash160(revocationKey.SerializeCompressed())
revokeAddr, err := btcutil.NewAddressWitnessPubKeyHash(pubkeyHash,
&chaincfg.SimNetParams)
if err != nil {
t.Fatalf("unable to create addr: %v", err)
}
revokeScript, err := txscript.PayToAddrScript(revokeAddr)
if err != nil {
t.Fatalf("unable to generate script: %v", err)
}
// With the script fully assemebld, instruct the wallet to fund the
// output with a newly creaed transaction.
revokeOutput := &wire.TxOut{
Value: btcutil.SatoshiPerBitcoin,
PkScript: revokeScript,
}
txid, err := w.SendOutputs([]*wire.TxOut{revokeOutput})
if err != nil {
t.Fatalf("unable to create output: %v", err)
}
// Query for the transaction generated above so we can located the
// index of our output.
tx, err := w.ChainIO.GetTransaction(txid)
if err != nil {
t.Fatalf("unable to query for tx: %v", err)
}
var outputIndex uint32
if bytes.Equal(tx.TxOut[0].PkScript, revokeScript) {
outputIndex = 0
} else {
outputIndex = 1
}
/// WIth the index located, we can create a transaction spending the
//referenced output.
sweepTx := wire.NewMsgTx(2)
sweepTx.AddTxIn(&wire.TxIn{
PreviousOutPoint: wire.OutPoint{
Hash: tx.TxHash(),
Index: outputIndex,
},
})
// Now we can populate the sign descriptor which we'll use to generate
// the signature. Within the descriptor we set the private tweak value
// as the key in the script is derived based on this tweak value and
// the key we originally generated above.
signDesc := &lnwallet.SignDescriptor{
PubKey: pubkey,
PrivateTweak: revocation,
WitnessScript: revokeScript,
Output: revokeOutput,
HashType: txscript.SigHashAll,
SigHashes: txscript.NewTxSigHashes(sweepTx),
InputIndex: 0,
}
// With the descriptor created, we use it to generate a signature, then
// manually create a valid witness stack we'll use for signing.
spendSig, err := w.Signer.SignOutputRaw(sweepTx, signDesc)
if err != nil {
t.Fatalf("unable to generate signature: %v", err)
}
witness := make([][]byte, 2)
witness[0] = append(spendSig, byte(txscript.SigHashAll))
witness[1] = revocationKey.SerializeCompressed()
sweepTx.TxIn[0].Witness = witness
// Finally, attempt to validate the completed transaction. This should
// succeed if the wallet was able to properly generate the proper
// private key.
vm, err := txscript.NewEngine(revokeScript,
sweepTx, 0, txscript.StandardVerifyFlags, nil,
nil, int64(btcutil.SatoshiPerBitcoin))
if err != nil {
t.Fatalf("unable to create engine: %v", err)
}
if err := vm.Execute(); err != nil {
t.Fatalf("revocation spend invalid: %v", err)
}
}
var walletTests = []func(miner *rpctest.Harness, w *lnwallet.LightningWallet, test *testing.T){
// TODO(roasbeef): reservation tests should prob be split out
testDualFundingReservationWorkflow,
testSingleFunderReservationWorkflowInitiator,
testSingleFunderReservationWorkflowResponder,
testFundingTransactionLockedOutputs,
testFundingCancellationNotEnoughFunds,
testTransactionSubscriptions,
testListTransactionDetails,
testSignOutputPrivateTweak,
testCancelNonExistantReservation,
}
type testLnWallet struct {
lnwallet *lnwallet.LightningWallet
cleanUpFunc func()
}
func clearWalletState(w *lnwallet.LightningWallet) error {
w.ResetReservations()
return w.ChannelDB.Wipe()
2015-11-19 01:59:07 +03:00
}
// TestInterfaces tests all registered interfaces with a unified set of tests
// which excersie each of the required methods found within the WalletController
// interface.
//
// NOTE: In the future, when additional implementations of the WalletController
// interface have been implemented, in order to ensure the new concrete
// implementation is automatically tested, two steps must be undertaken. First,
// one needs add a "non-captured" (_) import from the new sub-package. This
// import should trigger an init() method within the package which registeres
// the interface. Second, an additional case in the switch within the main loop
// below needs to be added which properly initializes the interface.
//
// 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)
if err != nil {
t.Fatalf("unable to create mining node: %v", err)
}
defer miningNode.TearDown()
if err := miningNode.SetUp(true, 25); err != nil {
t.Fatalf("unable to set up mining node: %v", err)
}
// Next mine enough blocks in order for segwit and the CSV package
// soft-fork to activate on SimNet.
numBlocks := netParams.MinerConfirmationWindow * 2
if _, err := miningNode.Node.Generate(numBlocks); err != nil {
t.Fatalf("unable to generate blocks: %v", err)
}
rpcConfig := miningNode.RPCConfig()
chainNotifier, err := btcdnotify.New(&rpcConfig)
if err != nil {
t.Fatalf("unable to create notifier: %v", err)
}
if err := chainNotifier.Start(); err != nil {
t.Fatalf("unable to start notifier: %v", err)
}
var bio lnwallet.BlockChainIO
var signer lnwallet.Signer
var wc lnwallet.WalletController
for _, walletDriver := range lnwallet.RegisteredWallets() {
tempTestDir, err := ioutil.TempDir("", "lnwallet")
if err != nil {
t.Fatalf("unable to create temp directory: %v", err)
}
defer os.RemoveAll(tempTestDir)
walletType := walletDriver.WalletType
switch walletType {
case "btcwallet":
btcwalletConfig := &btcwallet.Config{
PrivatePass: privPass,
HdSeed: testHdSeed[:],
DataDir: tempTestDir,
NetParams: netParams,
2017-02-23 22:56:47 +03:00
RPCHost: rpcConfig.Host,
RPCUser: rpcConfig.User,
RPCPass: rpcConfig.Pass,
CACert: rpcConfig.Certificates,
}
wc, err = walletDriver.New(btcwalletConfig)
if err != nil {
t.Fatalf("unable to create btcwallet: %v", err)
}
signer = wc.(*btcwallet.BtcWallet)
bio = wc.(*btcwallet.BtcWallet)
default:
t.Fatalf("unknown wallet driver: %v", walletType)
}
// Funding via 20 outputs with 4BTC each.
lnw, err := createTestWallet(tempTestDir, miningNode, netParams,
chainNotifier, wc, signer, bio)
if err != nil {
t.Fatalf("unable to create test ln wallet: %v", err)
}
// The wallet should now have 80BTC available for spending.
assertProperBalance(t, lnw, 1, 80)
// Execute every test, clearing possibly mutated wallet state after
// each step.
for _, walletTest := range walletTests {
walletTest(miningNode, lnw, t)
// TODO(roasbeef): possible reset mining node's chainstate to
// initial level, cleanly wipe buckets
if err := clearWalletState(lnw); err != nil &&
err != bolt.ErrBucketNotFound {
t.Fatalf("unable to wipe wallet state: %v", err)
}
}
lnw.Shutdown()
}
}