lnd.xprv/lnwallet/wallet_test.go

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package lnwallet
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import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
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"github.com/lightningnetwork/lnd/channeldb"
"github.com/roasbeef/btcd/chaincfg"
"github.com/Roasbeef/btcd/rpctest"
"github.com/roasbeef/btcd/btcec"
"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,
}
zeroHash = bytes.Repeat([]byte{0}, 32)
)
// 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, amount int32) {
balance, err := lw.CalculateBalance(1)
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 20BTC, "+
"instead have %v", balance)
}
}
// 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 [20]byte
delay uint32
id [wire.HashSize]byte
availableOutputs []*wire.TxIn
changeOutputs []*wire.TxOut
}
// Contribution returns bobNode's contribution necessary to open a payment
// channel with Alice.
func (b *bobNode) Contribution() *ChannelContribution {
return &ChannelContribution{
Inputs: b.availableOutputs,
ChangeOutputs: b.changeOutputs,
MultiSigKey: b.channelKey,
CommitKey: b.channelKey,
DeliveryAddress: b.deliveryAddress,
RevocationHash: b.revocation,
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) (*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 [20]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,
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 5 outputs each holding 4BTC.
if err := loadTestCredits(miningNode, wallet, 5, 4); err != nil {
return "", nil, err
}
return tempTestDir, wallet, nil
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}
func testBasicWalletReservationWorkFlow(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
// Create our test wallet, will have a total of 20 BTC available for
bobNode, err := newBobNode(miner)
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.
fundingAmount := btcutil.Amount(5 * 1e8)
chanReservation, err := lnwallet.InitChannelReservation(fundingAmount,
bobNode.id, 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.ChangeOutputs[0].Value != 3e8 {
t.Fatalf("coin selection failed, change output should be 3e8 "+
"satoshis, is instead %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")
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}
if ourContribution.DeliveryAddress == nil {
t.Fatalf("alice's final delivery address not found")
}
if bytes.Equal(ourContribution.RevocationHash[:], zeroHash) {
t.Fatalf("alice's revocation hash 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 commitmen
// t transactions.
if err := chanReservation.ProcessContribution(bobNode.Contribution()); 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")
}
// Additionally, the funding tx should have been populated.
if chanReservation.partialState.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 bytes.Equal(theirContribution.RevocationHash[:], zeroHash) {
t.Fatalf("bob's revocaiton hash 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.partialState.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()
channel, err := lnwallet.channelDB.FetchOpenChannel(bobNode.id)
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if err != nil {
t.Fatalf("unable to retrieve channel from DB: %v", err)
}
if channel.FundingTx.TxSha() != fundingTx.TxSha() {
t.Fatalf("channel state not properly saved")
}
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}
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,
testHdSeed, 4)
if err != nil {
t.Fatalf("unable to initialize funding reservation 1: %v", err)
}
chanReservation2, err := lnwallet.InitChannelReservation(fundingAmount,
testHdSeed, 4)
if err != nil {
t.Fatalf("unable to initialize funding reservation 2: %v", err)
}
// Neither should have any change, as all our output sizes are
// identical (4BTC).
ourContribution1 := chanReservation1.OurContribution()
if len(ourContribution1.Inputs) != 2 {
t.Fatalf("outputs for funding tx not properly selected, has %v "+
"outputs should have 2", len(ourContribution1.Inputs))
}
if len(ourContribution1.ChangeOutputs) != 0 {
t.Fatalf("funding transaction should have no change, instead has %v",
len(ourContribution1.ChangeOutputs))
}
ourContribution2 := chanReservation2.OurContribution()
if len(ourContribution2.Inputs) != 2 {
t.Fatalf("outputs for funding tx not properly selected, have %v "+
"outputs should have 2", len(ourContribution2.Inputs))
}
if len(ourContribution2.ChangeOutputs) != 0 {
t.Fatalf("funding transaction should have no change, instead has %v",
len(ourContribution2.ChangeOutputs))
}
// Now attempt to reserve funds for another channel, this time requesting
// 5 BTC. We only have 4BTC worth of outpoints that aren't locked, so
// this should fail.
amt := btcutil.Amount(8 * 1e8)
failedReservation, err := lnwallet.InitChannelReservation(amt,
testHdSeed, 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")
}
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}
func testFundingCancellationNotEnoughFunds(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
// Create a reservation for 12 BTC.
fundingAmount := btcutil.Amount(12 * 1e8)
chanReservation, err := lnwallet.InitChannelReservation(fundingAmount,
testHdSeed, 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) != 3 {
t.Fatalf("two outpoints should now be locked, instead %v are",
lockedOutPoints)
}
// Attempt to create another channel with 12 BTC, this should fail.
failedReservation, err := lnwallet.InitChannelReservation(fundingAmount,
testHdSeed, 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,
testHdSeed, 4)
if err != nil {
t.Fatalf("unable to initialize funding reservation: %v", err)
}
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}
func testCancelNonExistantReservation(miner *rpctest.Harness, lnwallet *LightningWallet, t *testing.T) {
// Create our own reservation, give it some ID.
res := newChannelReservation(1000, 5000, lnwallet, 22)
// 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 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){
testBasicWalletReservationWorkFlow,
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) {
w.nextFundingID = 0
w.fundingLimbo = make(map[uint64]*ChannelReservation)
w.ResetLockedOutpoints()
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}
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 5 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 20BTC available for spending.
assertProperBalance(t, lnwallet, 1, 20)
// 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
clearWalletState(lnwallet)
}
}