lnd.xprv/wallet/wallet_test.go

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package wallet
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import (
"bytes"
"crypto/sha256"
"io/ioutil"
"os"
"testing"
"time"
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"github.com/btcsuite/btcd/btcec"
"github.com/btcsuite/btcd/txscript"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcutil/coinset"
"github.com/btcsuite/btcwallet/waddrmgr"
"github.com/btcsuite/btcwallet/walletdb"
"github.com/btcsuite/btcwallet/wtxmgr"
)
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 in order to avoid derivation.
testHdSeed = []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,
}
)
func assertProperBalance(t *testing.T, lw *LightningWallet, numConfirms, amount int32) {
balance, err := lw.wallet.TxStore.Balance(0, 20)
if err != nil {
t.Fatalf("unable to query for balance: %v", err)
}
if balance != btcutil.Amount(20*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
multiSigKey *btcec.PublicKey
availableOutputs []*wire.TxIn
changeOutputs []*wire.TxOut
}
// signFundingTx generates signatures for all the inputs in the funding tx
// belonging to Bob.
func (b *bobNode) signFundingTx(fundingTx *wire.MsgTx) ([][]byte, error) {
bobSigs := make([][]byte, 0, len(b.availableOutputs))
bobPkScript := b.changeOutputs[0].PkScript
for i, _ := range fundingTx.TxIn {
// Alice has already signed this input
if fundingTx.TxIn[i].SignatureScript != nil {
continue
}
sigScript, err := txscript.SignatureScript(fundingTx, i,
bobPkScript, txscript.SigHashAll, b.privKey,
true)
if err != nil {
return nil, err
}
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bobSigs = append(bobSigs, sigScript)
}
return bobSigs, nil
}
// 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() (*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.
bobAddr, err := btcutil.NewAddressPubKey(privKey.PubKey().SerializeCompressed(),
ActiveNetParams)
if err != nil {
return nil, err
}
bobAddrScript, err := txscript.PayToAddrScript(bobAddr.AddressPubKeyHash())
if err != nil {
return nil, err
}
prevOut := wire.NewOutPoint(&wire.ShaHash{}, ^uint32(0))
// TODO(roasbeef): When the chain rpc is hooked in, assert bob's output
// actually exists and it unspent in the chain.
bobTxIn := wire.NewTxIn(prevOut, nil)
// Using bobs priv key above, create a change address he can spend.
bobChangeOutput := wire.NewTxOut(2*1e8, bobAddrScript)
return &bobNode{
privKey: privKey,
multiSigKey: pubKey,
availableOutputs: []*wire.TxIn{bobTxIn},
changeOutputs: []*wire.TxOut{bobChangeOutput},
}, nil
}
// addTestTx adds a output spendable by our test wallet, marked as included in
// 'block'.
func addTestTx(w *LightningWallet, rec *wtxmgr.TxRecord, block *wtxmgr.BlockMeta) error {
err := w.wallet.TxStore.InsertTx(rec, block)
if err != nil {
return err
}
// Check every output to determine whether it is controlled by a wallet
// key. If so, mark the output as a credit.
for i, output := range rec.MsgTx.TxOut {
_, addrs, _, err := txscript.ExtractPkScriptAddrs(output.PkScript,
ActiveNetParams)
if err != nil {
// Non-standard outputs are skipped.
continue
}
for _, addr := range addrs {
ma, err := w.wallet.Manager.Address(addr)
if err == nil {
err = w.wallet.TxStore.AddCredit(rec, block, uint32(i),
ma.Internal())
if err != nil {
return err
}
err = w.wallet.Manager.MarkUsed(addr)
if err != nil {
return err
}
continue
}
// Missing addresses are skipped. Other errors should
// be propagated.
if !waddrmgr.IsError(err, waddrmgr.ErrAddressNotFound) {
return err
}
}
}
return nil
}
func genBlockHash(n int) *wire.ShaHash {
sha := sha256.Sum256([]byte{byte(n)})
hash, _ := wire.NewShaHash(sha[:])
return hash
}
func loadTestCredits(w *LightningWallet, numOutputs, btcPerOutput int) error {
// Import the priv key (converting to WIF) above that controls all our
// available outputs.
privKey, _ := btcec.PrivKeyFromBytes(btcec.S256(), testWalletPrivKey)
if err := w.wallet.Unlock(privPass, time.Duration(0)); err != nil {
return err
}
bs := &waddrmgr.BlockStamp{Hash: *genBlockHash(1), Height: 1}
wif, err := btcutil.NewWIF(privKey, ActiveNetParams, true)
if err != nil {
return err
}
if _, err := w.wallet.ImportPrivateKey(wif, bs, false); err != nil {
return nil
}
if err := w.wallet.Manager.SetSyncedTo(&waddrmgr.BlockStamp{int32(1), *genBlockHash(1)}); err != nil {
return err
}
blk := wtxmgr.BlockMeta{wtxmgr.Block{Hash: *genBlockHash(2), Height: 2}, time.Now()}
// Create a simple P2PKH pubkey script spendable by Alice. For simplicity
// all of Alice's spendable funds will reside in this output.
satosihPerOutput := int64(btcPerOutput * 1e8)
walletAddr, err := btcutil.NewAddressPubKey(privKey.PubKey().SerializeCompressed(),
ActiveNetParams)
if err != nil {
return err
}
walletScriptCredit, err := txscript.PayToAddrScript(walletAddr.AddressPubKeyHash())
if err != nil {
return err
}
// Create numOutputs outputs spendable by our wallet each holding btcPerOutput
// in satoshis.
tx := wire.NewMsgTx()
prevOut := wire.NewOutPoint(genBlockHash(999), 1)
txIn := wire.NewTxIn(prevOut, []byte{txscript.OP_0, txscript.OP_0})
tx.AddTxIn(txIn)
for i := 0; i < numOutputs; i++ {
tx.AddTxOut(wire.NewTxOut(satosihPerOutput, walletScriptCredit))
}
txCredit, err := wtxmgr.NewTxRecordFromMsgTx(tx, time.Now())
if err != nil {
return err
}
if err := addTestTx(w, txCredit, &blk); err != nil {
return err
}
if err := w.wallet.Manager.SetSyncedTo(&waddrmgr.BlockStamp{int32(2), *genBlockHash(2)}); err != nil {
return err
}
// Make the wallet think it's been synced to block 10. This way the
// outputs we added above will have sufficient confirmations
// (hard coded to 6 atm).
for i := 3; i < 10; i++ {
sha := *genBlockHash(i)
if err := w.wallet.Manager.SetSyncedTo(&waddrmgr.BlockStamp{int32(i), sha}); err != nil {
return err
}
}
return nil
}
// createTestWallet creates a test LightningWallet will a total of 20BTC
// available for funding channels.
func createTestWallet() (string, *LightningWallet, error) {
privPass := []byte("private-test")
tempTestDir, err := ioutil.TempDir("", "lnwallet")
if err != nil {
return "", nil, nil
}
wallet, err := NewLightningWallet(privPass, nil, testHdSeed, tempTestDir)
if err != nil {
return "", nil, err
}
wallet.Start()
// Load our test wallet with 5 outputs each holding 4BTC.
if err := loadTestCredits(wallet, 5, 4); err != nil {
return "", nil, err
}
return tempTestDir, wallet, nil
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}
func TestBasicWalletReservationWorkFlow(t *testing.T) {
// Create our test wallet, will have a total of 20 BTC available for
// funding via 5 outputs with 4BTC each.
testDir, lnwallet, err := createTestWallet()
if err != nil {
t.Fatalf("unable to create test ln wallet: %v", err)
}
defer os.RemoveAll(testDir)
defer lnwallet.Stop()
// The wallet should now have 20BTC available for spending.
assertProperBalance(t, lnwallet, 1, 20)
bobNode, err := newBobNode()
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, SIGHASH)
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.
ourInputs, ourChange, ourMultsigKey := chanReservation.OurFunds()
if len(ourInputs) != 2 {
t.Fatalf("outputs for funding tx not properly selected, have %v "+
"outputs should have 2", len(ourInputs))
}
if ourMultsigKey == nil {
t.Fatalf("alice's key for multi-sig not found")
}
if ourChange[0].Value != 3e8 {
t.Fatalf("coin selection failed, change output should be 3e8 "+
"satoshis, is instead %v", ourChange[0].Value)
}
// Bob sends over his output, change addr and multi-sig key.
if err := chanReservation.AddFunds(bobNode.availableOutputs,
bobNode.changeOutputs, bobNode.multiSigKey); 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).
if len(chanReservation.OurSigs()) != 2 {
t.Fatalf("only %v of our sigs present, should have 2",
len(chanReservation.OurSigs()))
}
// 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.
theirInputs, theirChange, theirMultsigKey := chanReservation.TheirFunds()
if len(theirInputs) != 1 {
t.Fatalf("bob's outputs for funding tx not properly selected, have %v "+
"outputs should have 2", len(theirInputs))
}
if theirMultsigKey == nil {
t.Fatalf("alice's key for multi-sig not found")
}
if theirChange[0].Value != 2e8 {
t.Fatalf("bob should have one change output with value 2e8"+
"satoshis, is instead %v", theirChange[0].Value)
}
// 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)
}
if err := chanReservation.CompleteReservation(bobsSigs); 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.
// A bucket should have been created for this pending channel, and the
// state commited.
err = lnwallet.lnNamespace.View(func(tx walletdb.Tx) error {
// The open channel bucket should have been created.
rootBucket := tx.RootBucket()
openChanBucket := rootBucket.Bucket(openChannelBucket)
if openChanBucket == nil {
t.Fatalf("openChanBucket should be created, but isn't")
}
// The sub-bucket for this channel, keyed by the txid of the
// funding transaction
txid := chanReservation.fundingTx.TxSha()
bobChanBucket := openChanBucket.Bucket(txid[:])
if bobChanBucket == nil {
t.Fatalf("bucket for the alice-bob channe should exist, " +
"but doesn't")
}
var storedTx wire.MsgTx
b := bytes.NewReader(bobChanBucket.Get(fundingTxKey))
storedTx.Deserialize(b)
// The hash of the stored tx should be indentical to our funding tx.
storedTxId := storedTx.TxSha()
actualTxId := chanReservation.fundingTx.TxSha()
if !bytes.Equal(storedTxId.Bytes(), actualTxId.Bytes()) {
t.Fatalf("stored funding tx doesn't match actual")
}
return nil
})
// The funding tx should now be valid and complete.
// Check each input and ensure all scripts are fully valid.
var zeroHash wire.ShaHash
fundingTx := chanReservation.fundingTx
for i, input := range chanReservation.fundingTx.TxIn {
var pkscript []byte
// Bob's txin
if bytes.Equal(input.PreviousOutPoint.Hash.Bytes(),
zeroHash.Bytes()) {
pkscript = bobNode.changeOutputs[0].PkScript
} else {
// Does the wallet know about the txin?
txDetail, err := lnwallet.wallet.TxStore.TxDetails(&input.PreviousOutPoint.Hash)
if txDetail == nil || err != nil {
t.Fatalf("txstore can't find tx detail, err: %v", err)
}
prevIndex := input.PreviousOutPoint.Index
pkscript = txDetail.TxRecord.MsgTx.TxOut[prevIndex].PkScript
}
vm, err := txscript.NewEngine(pkscript,
fundingTx, i, txscript.StandardVerifyFlags, nil)
if err != nil {
// TODO(roasbeef): cancel at this stage if invalid sigs?
t.Fatalf("cannot create script engine: %s", err)
}
if err = vm.Execute(); err != nil {
t.Fatalf("cannot validate transaction: %s", err)
}
}
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}
// TODO(roasbeef): why is wallet so slow to create+open?
// * investigate
// * re-use same lnwallet instance accross tests resetting each time?
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func TestFundingTransactionLockedOutputs(t *testing.T) {
// Create our test wallet, will have a total of 20 BTC available for
// funding via 5 outputs with 4BTC each.
testDir, lnwallet, err := createTestWallet()
if err != nil {
t.Fatalf("unable to create test ln wallet: %v", err)
}
defer os.RemoveAll(testDir)
defer lnwallet.Stop()
// The wallet should now have 20BTC available for spending.
assertProperBalance(t, lnwallet, 1, 20)
// Create two channels, both asking for 8 BTC each, totalling 16
// BTC.
// TODO(roasbeef): tests for concurrent funding.
fundingAmount := btcutil.Amount(8 * 1e8)
chanReservation1, err := lnwallet.InitChannelReservation(fundingAmount, SIGHASH)
if err != nil {
t.Fatalf("unable to initialize funding reservation 1: %v", err)
}
chanReservation2, err := lnwallet.InitChannelReservation(fundingAmount, SIGHASH)
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).
ourInputs1, ourChange1, _ := chanReservation1.OurFunds()
if len(ourInputs1) != 2 {
t.Fatalf("outputs for funding tx not properly selected, has %v "+
"outputs should have 2", len(ourInputs1))
}
if len(ourChange1) != 0 {
t.Fatalf("funding transaction should have no change, instead has %v",
len(ourChange1))
}
ourInputs2, ourChange2, _ := chanReservation2.OurFunds()
if len(ourInputs2) != 2 {
t.Fatalf("outputs for funding tx not properly selected, have %v "+
"outputs should have 2", len(ourInputs2))
}
if len(ourChange2) != 0 {
t.Fatalf("funding transaction should have no change, instead has %v",
len(ourChange2))
}
// 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, SIGHASH)
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 TestFundingTransactionCancellationFreeOutputs(t *testing.T) {
}
func TestFundingReservationInsufficientFunds(t *testing.T) {
}
func TestFundingReservationInvalidCounterpartySigs(t *testing.T) {
}
func TestFundingTransactionTxFees(t *testing.T) {
}