lbcwallet/wtxmgr/tx_test.go
carla 50869085eb
wtxmgr: add put and fetch functions for optional transaction label
Add and test functions which can be used to write optional transaction
labels to disk in their own bucket. These labels are keyed by txid and
write the labels to disk using-length value encoding scheme. Although
the length field is not required at present, it is added to allow future
extensibility without a migration.

This approach is chosen over adding this information to txRecords,
Because a migration would be required to add a field after the variable
Length serialized tx.

The put label function will overwrite existing labels if called more
than once for the same txid. User side validation of whether we want
to override this label should be performed by calling code. Labels must
be > 0 characters and <= 500 characters (an arbitrarily chosen limit).
2020-05-11 15:16:11 +02:00

2357 lines
63 KiB
Go

// Copyright (c) 2013-2017 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package wtxmgr
import (
"bytes"
"encoding/hex"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcwallet/walletdb"
_ "github.com/btcsuite/btcwallet/walletdb/bdb"
)
// Received transaction output for mainnet outpoint
// 61d3696de4c888730cbe06b0ad8ecb6d72d6108e893895aa9bc067bd7eba3fad:0
var (
TstRecvSerializedTx, _ = hex.DecodeString("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")
TstRecvTx, _ = btcutil.NewTxFromBytes(TstRecvSerializedTx)
TstRecvTxSpendingTxBlockHash, _ = chainhash.NewHashFromStr("00000000000000017188b968a371bab95aa43522665353b646e41865abae02a4")
TstRecvAmt = int64(10000000)
TstRecvTxBlockDetails = &BlockMeta{
Block: Block{Hash: *TstRecvTxSpendingTxBlockHash, Height: 276425},
Time: time.Unix(1387737310, 0),
}
TstRecvCurrentHeight = int32(284498) // mainnet blockchain height at time of writing
TstRecvTxOutConfirms = 8074 // hardcoded number of confirmations given the above block height
TstSpendingSerializedTx, _ = hex.DecodeString("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")
TstSpendingTx, _ = btcutil.NewTxFromBytes(TstSpendingSerializedTx)
TstSpendingTxBlockHeight = int32(279143)
TstSignedTxBlockHash, _ = chainhash.NewHashFromStr("00000000000000017188b968a371bab95aa43522665353b646e41865abae02a4")
TstSignedTxBlockDetails = &BlockMeta{
Block: Block{Hash: *TstSignedTxBlockHash, Height: TstSpendingTxBlockHeight},
Time: time.Unix(1389114091, 0),
}
)
func testDB() (walletdb.DB, func(), error) {
tmpDir, err := ioutil.TempDir("", "wtxmgr_test")
if err != nil {
return nil, func() {}, err
}
db, err := walletdb.Create("bdb", filepath.Join(tmpDir, "db"), true)
return db, func() { os.RemoveAll(tmpDir) }, err
}
var namespaceKey = []byte("txstore")
func testStore() (*Store, walletdb.DB, func(), error) {
tmpDir, err := ioutil.TempDir("", "wtxmgr_test")
if err != nil {
return nil, nil, func() {}, err
}
db, err := walletdb.Create("bdb", filepath.Join(tmpDir, "db"), true)
if err != nil {
os.RemoveAll(tmpDir)
return nil, nil, nil, err
}
teardown := func() {
db.Close()
os.RemoveAll(tmpDir)
}
var s *Store
err = walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns, err := tx.CreateTopLevelBucket(namespaceKey)
if err != nil {
return err
}
err = Create(ns)
if err != nil {
return err
}
s, err = Open(ns, &chaincfg.TestNet3Params)
return err
})
return s, db, teardown, err
}
func serializeTx(tx *btcutil.Tx) []byte {
var buf bytes.Buffer
err := tx.MsgTx().Serialize(&buf)
if err != nil {
panic(err)
}
return buf.Bytes()
}
func TestInsertsCreditsDebitsRollbacks(t *testing.T) {
t.Parallel()
// Create a double spend of the received blockchain transaction.
dupRecvTx, _ := btcutil.NewTxFromBytes(TstRecvSerializedTx)
// Switch txout amount to 1 BTC. Transaction store doesn't
// validate txs, so this is fine for testing a double spend
// removal.
TstDupRecvAmount := int64(1e8)
newDupMsgTx := dupRecvTx.MsgTx()
newDupMsgTx.TxOut[0].Value = TstDupRecvAmount
TstDoubleSpendTx := btcutil.NewTx(newDupMsgTx)
TstDoubleSpendSerializedTx := serializeTx(TstDoubleSpendTx)
// Create a "signed" (with invalid sigs) tx that spends output 0 of
// the double spend.
spendingTx := wire.NewMsgTx(wire.TxVersion)
spendingTxIn := wire.NewTxIn(wire.NewOutPoint(TstDoubleSpendTx.Hash(), 0), []byte{0, 1, 2, 3, 4}, nil)
spendingTx.AddTxIn(spendingTxIn)
spendingTxOut1 := wire.NewTxOut(1e7, []byte{5, 6, 7, 8, 9})
spendingTxOut2 := wire.NewTxOut(9e7, []byte{10, 11, 12, 13, 14})
spendingTx.AddTxOut(spendingTxOut1)
spendingTx.AddTxOut(spendingTxOut2)
TstSpendingTx := btcutil.NewTx(spendingTx)
TstSpendingSerializedTx := serializeTx(TstSpendingTx)
var _ = TstSpendingTx
tests := []struct {
name string
f func(*Store, walletdb.ReadWriteBucket) (*Store, error)
bal, unc btcutil.Amount
unspents map[wire.OutPoint]struct{}
unmined map[chainhash.Hash]struct{}
}{
{
name: "new store",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
return s, nil
},
bal: 0,
unc: 0,
unspents: map[wire.OutPoint]struct{}{},
unmined: map[chainhash.Hash]struct{}{},
},
{
name: "txout insert",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, nil)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, nil, 0, false)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstRecvTx.MsgTx().TxOut[0].Value),
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstRecvTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{
*TstRecvTx.Hash(): {},
},
},
{
name: "insert duplicate unconfirmed",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, nil)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, nil, 0, false)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstRecvTx.MsgTx().TxOut[0].Value),
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstRecvTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{
*TstRecvTx.Hash(): {},
},
},
{
name: "confirmed txout insert",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, TstRecvTxBlockDetails)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, TstRecvTxBlockDetails, 0, false)
return s, err
},
bal: btcutil.Amount(TstRecvTx.MsgTx().TxOut[0].Value),
unc: 0,
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstRecvTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{},
},
{
name: "insert duplicate confirmed",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, TstRecvTxBlockDetails)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, TstRecvTxBlockDetails, 0, false)
return s, err
},
bal: btcutil.Amount(TstRecvTx.MsgTx().TxOut[0].Value),
unc: 0,
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstRecvTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{},
},
{
name: "rollback confirmed credit",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
err := s.Rollback(ns, TstRecvTxBlockDetails.Height)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstRecvTx.MsgTx().TxOut[0].Value),
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstRecvTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{
*TstRecvTx.Hash(): {},
},
},
{
name: "insert confirmed double spend",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstDoubleSpendSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, TstRecvTxBlockDetails)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, TstRecvTxBlockDetails, 0, false)
return s, err
},
bal: btcutil.Amount(TstDoubleSpendTx.MsgTx().TxOut[0].Value),
unc: 0,
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstDoubleSpendTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{},
},
{
name: "insert unconfirmed debit",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstSpendingSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, nil)
return s, err
},
bal: 0,
unc: 0,
unspents: map[wire.OutPoint]struct{}{},
unmined: map[chainhash.Hash]struct{}{
*TstSpendingTx.Hash(): {},
},
},
{
name: "insert unconfirmed debit again",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstDoubleSpendSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, TstRecvTxBlockDetails)
return s, err
},
bal: 0,
unc: 0,
unspents: map[wire.OutPoint]struct{}{},
unmined: map[chainhash.Hash]struct{}{
*TstSpendingTx.Hash(): {},
},
},
{
name: "insert change (index 0)",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstSpendingSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, nil)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, nil, 0, true)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value),
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstSpendingTx.Hash(),
Index: 0,
}: {},
},
unmined: map[chainhash.Hash]struct{}{
*TstSpendingTx.Hash(): {},
},
},
{
name: "insert output back to this own wallet (index 1)",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstSpendingSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, nil)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, nil, 1, true)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value + TstSpendingTx.MsgTx().TxOut[1].Value),
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstSpendingTx.Hash(),
Index: 0,
}: {},
{
Hash: *TstSpendingTx.Hash(),
Index: 1,
}: {},
},
unmined: map[chainhash.Hash]struct{}{
*TstSpendingTx.Hash(): {},
},
},
{
name: "confirm signed tx",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstSpendingSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, TstSignedTxBlockDetails)
return s, err
},
bal: btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value + TstSpendingTx.MsgTx().TxOut[1].Value),
unc: 0,
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstSpendingTx.Hash(),
Index: 0,
}: {},
{
Hash: *TstSpendingTx.Hash(),
Index: 1,
}: {},
},
unmined: map[chainhash.Hash]struct{}{},
},
{
name: "rollback after spending tx",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
err := s.Rollback(ns, TstSignedTxBlockDetails.Height+1)
return s, err
},
bal: btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value + TstSpendingTx.MsgTx().TxOut[1].Value),
unc: 0,
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstSpendingTx.Hash(),
Index: 0,
}: {},
{
Hash: *TstSpendingTx.Hash(),
Index: 1,
}: {},
},
unmined: map[chainhash.Hash]struct{}{},
},
{
name: "rollback spending tx block",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
err := s.Rollback(ns, TstSignedTxBlockDetails.Height)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value + TstSpendingTx.MsgTx().TxOut[1].Value),
unspents: map[wire.OutPoint]struct{}{
{
Hash: *TstSpendingTx.Hash(),
Index: 0,
}: {},
{
Hash: *TstSpendingTx.Hash(),
Index: 1,
}: {},
},
unmined: map[chainhash.Hash]struct{}{
*TstSpendingTx.Hash(): {},
},
},
{
name: "rollback double spend tx block",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
err := s.Rollback(ns, TstRecvTxBlockDetails.Height)
return s, err
},
bal: 0,
unc: btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value + TstSpendingTx.MsgTx().TxOut[1].Value),
unspents: map[wire.OutPoint]struct{}{
*wire.NewOutPoint(TstSpendingTx.Hash(), 0): {},
*wire.NewOutPoint(TstSpendingTx.Hash(), 1): {},
},
unmined: map[chainhash.Hash]struct{}{
*TstDoubleSpendTx.Hash(): {},
*TstSpendingTx.Hash(): {},
},
},
{
name: "insert original recv txout",
f: func(s *Store, ns walletdb.ReadWriteBucket) (*Store, error) {
rec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
return nil, err
}
err = s.InsertTx(ns, rec, TstRecvTxBlockDetails)
if err != nil {
return nil, err
}
err = s.AddCredit(ns, rec, TstRecvTxBlockDetails, 0, false)
return s, err
},
bal: btcutil.Amount(TstRecvTx.MsgTx().TxOut[0].Value),
unc: 0,
unspents: map[wire.OutPoint]struct{}{
*wire.NewOutPoint(TstRecvTx.Hash(), 0): {},
},
unmined: map[chainhash.Hash]struct{}{},
},
}
s, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
for _, test := range tests {
err := walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns := tx.ReadWriteBucket(namespaceKey)
tmpStore, err := test.f(s, ns)
if err != nil {
t.Fatalf("%s: got error: %v", test.name, err)
}
s = tmpStore
bal, err := s.Balance(ns, 1, TstRecvCurrentHeight)
if err != nil {
t.Fatalf("%s: Confirmed Balance failed: %v", test.name, err)
}
if bal != test.bal {
t.Fatalf("%s: balance mismatch: expected: %d, got: %d", test.name, test.bal, bal)
}
unc, err := s.Balance(ns, 0, TstRecvCurrentHeight)
if err != nil {
t.Fatalf("%s: Unconfirmed Balance failed: %v", test.name, err)
}
unc -= bal
if unc != test.unc {
t.Fatalf("%s: unconfirmed balance mismatch: expected %d, got %d", test.name, test.unc, unc)
}
// Check that unspent outputs match expected.
unspent, err := s.UnspentOutputs(ns)
if err != nil {
t.Fatalf("%s: failed to fetch unspent outputs: %v", test.name, err)
}
for _, cred := range unspent {
if _, ok := test.unspents[cred.OutPoint]; !ok {
t.Errorf("%s: unexpected unspent output: %v", test.name, cred.OutPoint)
}
delete(test.unspents, cred.OutPoint)
}
if len(test.unspents) != 0 {
t.Fatalf("%s: missing expected unspent output(s)", test.name)
}
// Check that unmined txs match expected.
unmined, err := s.UnminedTxs(ns)
if err != nil {
t.Fatalf("%s: cannot load unmined transactions: %v", test.name, err)
}
for _, tx := range unmined {
txHash := tx.TxHash()
if _, ok := test.unmined[txHash]; !ok {
t.Fatalf("%s: unexpected unmined tx: %v", test.name, txHash)
}
delete(test.unmined, txHash)
}
if len(test.unmined) != 0 {
t.Fatalf("%s: missing expected unmined tx(s)", test.name)
}
return nil
})
if err != nil {
t.Fatal(err)
}
}
}
func TestFindingSpentCredits(t *testing.T) {
t.Parallel()
s, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
dbtx, err := db.BeginReadWriteTx()
if err != nil {
t.Fatal(err)
}
defer dbtx.Commit()
ns := dbtx.ReadWriteBucket(namespaceKey)
// Insert transaction and credit which will be spent.
recvRec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, recvRec, TstRecvTxBlockDetails)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, recvRec, TstRecvTxBlockDetails, 0, false)
if err != nil {
t.Fatal(err)
}
// Insert confirmed transaction which spends the above credit.
spendingRec, err := NewTxRecord(TstSpendingSerializedTx, time.Now())
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, spendingRec, TstSignedTxBlockDetails)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spendingRec, TstSignedTxBlockDetails, 0, false)
if err != nil {
t.Fatal(err)
}
bal, err := s.Balance(ns, 1, TstSignedTxBlockDetails.Height)
if err != nil {
t.Fatal(err)
}
expectedBal := btcutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value)
if bal != expectedBal {
t.Fatalf("bad balance: %v != %v", bal, expectedBal)
}
unspents, err := s.UnspentOutputs(ns)
if err != nil {
t.Fatal(err)
}
op := wire.NewOutPoint(TstSpendingTx.Hash(), 0)
if unspents[0].OutPoint != *op {
t.Fatal("unspent outpoint doesn't match expected")
}
if len(unspents) > 1 {
t.Fatal("has more than one unspent credit")
}
}
func newCoinBase(outputValues ...int64) *wire.MsgTx {
tx := wire.MsgTx{
TxIn: []*wire.TxIn{
{
PreviousOutPoint: wire.OutPoint{Index: ^uint32(0)},
},
},
}
for _, val := range outputValues {
tx.TxOut = append(tx.TxOut, &wire.TxOut{Value: val})
}
return &tx
}
func spendOutput(txHash *chainhash.Hash, index uint32, outputValues ...int64) *wire.MsgTx {
tx := wire.MsgTx{
TxIn: []*wire.TxIn{
{
PreviousOutPoint: wire.OutPoint{Hash: *txHash, Index: index},
},
},
}
for _, val := range outputValues {
tx.TxOut = append(tx.TxOut, &wire.TxOut{Value: val})
}
return &tx
}
func spendOutputs(outputs []wire.OutPoint, outputValues ...int64) *wire.MsgTx {
tx := &wire.MsgTx{}
for _, output := range outputs {
tx.TxIn = append(tx.TxIn, &wire.TxIn{PreviousOutPoint: output})
}
for _, value := range outputValues {
tx.TxOut = append(tx.TxOut, &wire.TxOut{Value: value})
}
return tx
}
func TestCoinbases(t *testing.T) {
t.Parallel()
s, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
dbtx, err := db.BeginReadWriteTx()
if err != nil {
t.Fatal(err)
}
defer dbtx.Commit()
ns := dbtx.ReadWriteBucket(namespaceKey)
b100 := BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb := newCoinBase(20e8, 10e8, 30e8)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
// Insert coinbase and mark outputs 0 and 2 as credits.
err = s.InsertTx(ns, cbRec, &b100)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, cbRec, &b100, 0, false)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, cbRec, &b100, 2, false)
if err != nil {
t.Fatal(err)
}
coinbaseMaturity := int32(chaincfg.TestNet3Params.CoinbaseMaturity)
// Balance should be 0 if the coinbase is immature, 50 BTC at and beyond
// maturity.
//
// Outputs when depth is below maturity are never included, no matter
// the required number of confirmations. Matured outputs which have
// greater depth than minConf are still excluded.
type balTest struct {
height int32
minConf int32
bal btcutil.Amount
}
balTests := []balTest{
// Next block it is still immature
{
height: b100.Height + coinbaseMaturity - 2,
minConf: 0,
bal: 0,
},
{
height: b100.Height + coinbaseMaturity - 2,
minConf: coinbaseMaturity,
bal: 0,
},
// Next block it matures
{
height: b100.Height + coinbaseMaturity - 1,
minConf: 0,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: 1,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: coinbaseMaturity - 1,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: coinbaseMaturity,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: coinbaseMaturity + 1,
bal: 0,
},
// Matures at this block
{
height: b100.Height + coinbaseMaturity,
minConf: 0,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: 1,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: coinbaseMaturity,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: coinbaseMaturity + 1,
bal: 50e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: coinbaseMaturity + 2,
bal: 0,
},
}
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks after inserting coinbase")
}
// Spend an output from the coinbase tx in an unmined transaction when
// the next block will mature the coinbase.
spenderATime := time.Now()
spenderA := spendOutput(&cbRec.Hash, 0, 5e8, 15e8)
spenderARec, err := NewTxRecordFromMsgTx(spenderA, spenderATime)
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, spenderARec, nil)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spenderARec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
balTests = []balTest{
// Next block it matures
{
height: b100.Height + coinbaseMaturity - 1,
minConf: 0,
bal: 35e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: 1,
bal: 30e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: coinbaseMaturity,
bal: 30e8,
},
{
height: b100.Height + coinbaseMaturity - 1,
minConf: coinbaseMaturity + 1,
bal: 0,
},
// Matures at this block
{
height: b100.Height + coinbaseMaturity,
minConf: 0,
bal: 35e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: 1,
bal: 30e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: coinbaseMaturity,
bal: 30e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: coinbaseMaturity + 1,
bal: 30e8,
},
{
height: b100.Height + coinbaseMaturity,
minConf: coinbaseMaturity + 2,
bal: 0,
},
}
balTestsBeforeMaturity := balTests
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks after spending coinbase with unmined transaction")
}
// Mine the spending transaction in the block the coinbase matures.
bMaturity := BlockMeta{
Block: Block{Height: b100.Height + coinbaseMaturity},
Time: time.Now(),
}
err = s.InsertTx(ns, spenderARec, &bMaturity)
if err != nil {
t.Fatal(err)
}
balTests = []balTest{
// Maturity height
{
height: bMaturity.Height,
minConf: 0,
bal: 35e8,
},
{
height: bMaturity.Height,
minConf: 1,
bal: 35e8,
},
{
height: bMaturity.Height,
minConf: 2,
bal: 30e8,
},
{
height: bMaturity.Height,
minConf: coinbaseMaturity,
bal: 30e8,
},
{
height: bMaturity.Height,
minConf: coinbaseMaturity + 1,
bal: 30e8,
},
{
height: bMaturity.Height,
minConf: coinbaseMaturity + 2,
bal: 0,
},
// Next block after maturity height
{
height: bMaturity.Height + 1,
minConf: 0,
bal: 35e8,
},
{
height: bMaturity.Height + 1,
minConf: 2,
bal: 35e8,
},
{
height: bMaturity.Height + 1,
minConf: 3,
bal: 30e8,
},
{
height: bMaturity.Height + 1,
minConf: coinbaseMaturity + 2,
bal: 30e8,
},
{
height: bMaturity.Height + 1,
minConf: coinbaseMaturity + 3,
bal: 0,
},
}
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks mining coinbase spending transaction")
}
// Create another spending transaction which spends the credit from the
// first spender. This will be used to test removing the entire
// conflict chain when the coinbase is later reorged out.
//
// Use the same output amount as spender A and mark it as a credit.
// This will mean the balance tests should report identical results.
spenderBTime := time.Now()
spenderB := spendOutput(&spenderARec.Hash, 0, 5e8)
spenderBRec, err := NewTxRecordFromMsgTx(spenderB, spenderBTime)
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, spenderBRec, &bMaturity)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spenderBRec, &bMaturity, 0, false)
if err != nil {
t.Fatal(err)
}
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks mining second spending transaction")
}
// Reorg out the block that matured the coinbase and check balances
// again.
err = s.Rollback(ns, bMaturity.Height)
if err != nil {
t.Fatal(err)
}
balTests = balTestsBeforeMaturity
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks after reorging maturity block")
}
// Reorg out the block which contained the coinbase. There should be no
// more transactions in the store (since the previous outputs referenced
// by the spending tx no longer exist), and the balance will always be
// zero.
err = s.Rollback(ns, b100.Height)
if err != nil {
t.Fatal(err)
}
balTests = []balTest{
// Current height
{
height: b100.Height - 1,
minConf: 0,
bal: 0,
},
{
height: b100.Height - 1,
minConf: 1,
bal: 0,
},
// Next height
{
height: b100.Height,
minConf: 0,
bal: 0,
},
{
height: b100.Height,
minConf: 1,
bal: 0,
},
}
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks after reorging coinbase block")
}
unminedTxs, err := s.UnminedTxs(ns)
if err != nil {
t.Fatal(err)
}
if len(unminedTxs) != 0 {
t.Fatalf("Should have no unmined transactions after coinbase reorg, found %d", len(unminedTxs))
}
}
// Test moving multiple transactions from unmined buckets to the same block.
func TestMoveMultipleToSameBlock(t *testing.T) {
t.Parallel()
s, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
dbtx, err := db.BeginReadWriteTx()
if err != nil {
t.Fatal(err)
}
defer dbtx.Commit()
ns := dbtx.ReadWriteBucket(namespaceKey)
b100 := BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb := newCoinBase(20e8, 30e8)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
// Insert coinbase and mark both outputs as credits.
err = s.InsertTx(ns, cbRec, &b100)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, cbRec, &b100, 0, false)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, cbRec, &b100, 1, false)
if err != nil {
t.Fatal(err)
}
// Create and insert two unmined transactions which spend both coinbase
// outputs.
spenderATime := time.Now()
spenderA := spendOutput(&cbRec.Hash, 0, 1e8, 2e8, 18e8)
spenderARec, err := NewTxRecordFromMsgTx(spenderA, spenderATime)
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, spenderARec, nil)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spenderARec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spenderARec, nil, 1, false)
if err != nil {
t.Fatal(err)
}
spenderBTime := time.Now()
spenderB := spendOutput(&cbRec.Hash, 1, 4e8, 8e8, 18e8)
spenderBRec, err := NewTxRecordFromMsgTx(spenderB, spenderBTime)
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, spenderBRec, nil)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spenderBRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(ns, spenderBRec, nil, 1, false)
if err != nil {
t.Fatal(err)
}
coinbaseMaturity := int32(chaincfg.TestNet3Params.CoinbaseMaturity)
// Mine both transactions in the block that matures the coinbase.
bMaturity := BlockMeta{
Block: Block{Height: b100.Height + coinbaseMaturity},
Time: time.Now(),
}
err = s.InsertTx(ns, spenderARec, &bMaturity)
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, spenderBRec, &bMaturity)
if err != nil {
t.Fatal(err)
}
// Check that both transactions can be queried at the maturity block.
detailsA, err := s.UniqueTxDetails(ns, &spenderARec.Hash, &bMaturity.Block)
if err != nil {
t.Fatal(err)
}
if detailsA == nil {
t.Fatal("No details found for first spender")
}
detailsB, err := s.UniqueTxDetails(ns, &spenderBRec.Hash, &bMaturity.Block)
if err != nil {
t.Fatal(err)
}
if detailsB == nil {
t.Fatal("No details found for second spender")
}
// Verify that the balance was correctly updated on the block record
// append and that no unmined transactions remain.
balTests := []struct {
height int32
minConf int32
bal btcutil.Amount
}{
// Maturity height
{
height: bMaturity.Height,
minConf: 0,
bal: 15e8,
},
{
height: bMaturity.Height,
minConf: 1,
bal: 15e8,
},
{
height: bMaturity.Height,
minConf: 2,
bal: 0,
},
// Next block after maturity height
{
height: bMaturity.Height + 1,
minConf: 0,
bal: 15e8,
},
{
height: bMaturity.Height + 1,
minConf: 2,
bal: 15e8,
},
{
height: bMaturity.Height + 1,
minConf: 3,
bal: 0,
},
}
for i, tst := range balTests {
bal, err := s.Balance(ns, tst.minConf, tst.height)
if err != nil {
t.Fatalf("Balance test %d: Store.Balance failed: %v", i, err)
}
if bal != tst.bal {
t.Errorf("Balance test %d: Got %v Expected %v", i, bal, tst.bal)
}
}
if t.Failed() {
t.Fatal("Failed balance checks after moving both coinbase spenders")
}
unminedTxs, err := s.UnminedTxs(ns)
if err != nil {
t.Fatal(err)
}
if len(unminedTxs) != 0 {
t.Fatalf("Should have no unmined transactions mining both, found %d", len(unminedTxs))
}
}
// Test the optional-ness of the serialized transaction in a TxRecord.
// NewTxRecord and NewTxRecordFromMsgTx both save the serialized transaction, so
// manually strip it out to test this code path.
func TestInsertUnserializedTx(t *testing.T) {
t.Parallel()
s, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
dbtx, err := db.BeginReadWriteTx()
if err != nil {
t.Fatal(err)
}
defer dbtx.Commit()
ns := dbtx.ReadWriteBucket(namespaceKey)
tx := newCoinBase(50e8)
rec, err := NewTxRecordFromMsgTx(tx, timeNow())
if err != nil {
t.Fatal(err)
}
b100 := makeBlockMeta(100)
err = s.InsertTx(ns, stripSerializedTx(rec), &b100)
if err != nil {
t.Fatalf("Insert for stripped TxRecord failed: %v", err)
}
// Ensure it can be retreived successfully.
details, err := s.UniqueTxDetails(ns, &rec.Hash, &b100.Block)
if err != nil {
t.Fatal(err)
}
rec2, err := NewTxRecordFromMsgTx(&details.MsgTx, rec.Received)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(rec.SerializedTx, rec2.SerializedTx) {
t.Fatal("Serialized txs for coinbase do not match")
}
// Now test that path with an unmined transaction.
tx = spendOutput(&rec.Hash, 0, 50e8)
rec, err = NewTxRecordFromMsgTx(tx, timeNow())
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(ns, rec, nil)
if err != nil {
t.Fatal(err)
}
details, err = s.UniqueTxDetails(ns, &rec.Hash, nil)
if err != nil {
t.Fatal(err)
}
rec2, err = NewTxRecordFromMsgTx(&details.MsgTx, rec.Received)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(rec.SerializedTx, rec2.SerializedTx) {
t.Fatal("Serialized txs for coinbase spender do not match")
}
}
// TestRemoveUnminedTx tests that if we add an umined transaction, then we're
// able to remove that unmined transaction later along with any of its
// descendants. Any balance modifications due to the unmined transaction should
// be revered.
func TestRemoveUnminedTx(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// In order to reproduce real-world scenarios, we'll use a new database
// transaction for each interaction with the wallet.
//
// We'll start off the test by creating a new coinbase output at height
// 100 and inserting it into the store.
b100 := &BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
initialBalance := int64(1e8)
cb := newCoinBase(initialBalance)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec, b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec, b100, 0, false)
if err != nil {
t.Fatal(err)
}
})
// Determine the maturity height for the coinbase output created.
coinbaseMaturity := int32(chaincfg.TestNet3Params.CoinbaseMaturity)
maturityHeight := b100.Block.Height + coinbaseMaturity
// checkBalance is a helper function that compares the balance of the
// store with the expected value. The includeUnconfirmed boolean can be
// used to include the unconfirmed balance as a part of the total
// balance.
checkBalance := func(expectedBalance btcutil.Amount,
includeUnconfirmed bool) {
t.Helper()
minConfs := int32(1)
if includeUnconfirmed {
minConfs = 0
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
t.Helper()
b, err := store.Balance(ns, minConfs, maturityHeight)
if err != nil {
t.Fatalf("unable to retrieve balance: %v", err)
}
if b != expectedBalance {
t.Fatalf("expected balance of %d, got %d",
expectedBalance, b)
}
})
}
// Since we don't have any unconfirmed transactions within the store,
// the total balance reflecting confirmed and unconfirmed outputs should
// match the initial balance.
checkBalance(btcutil.Amount(initialBalance), false)
checkBalance(btcutil.Amount(initialBalance), true)
// Then, we'll create an unconfirmed spend for the coinbase output and
// insert it into the store.
b101 := &BlockMeta{
Block: Block{Height: 201},
Time: time.Now(),
}
changeAmount := int64(4e7)
spendTx := spendOutput(&cbRec.Hash, 0, 5e7, changeAmount)
spendTxRec, err := NewTxRecordFromMsgTx(spendTx, b101.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, spendTxRec, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, spendTxRec, nil, 1, true)
if err != nil {
t.Fatal(err)
}
})
// With the unconfirmed spend inserted into the store, we'll query it
// for its unconfirmed tranasctions to ensure it was properly added.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
unminedTxs, err := store.UnminedTxs(ns)
if err != nil {
t.Fatalf("unable to query for unmined txs: %v", err)
}
if len(unminedTxs) != 1 {
t.Fatalf("expected 1 mined tx, instead got %v",
len(unminedTxs))
}
unminedTxHash := unminedTxs[0].TxHash()
spendTxHash := spendTx.TxHash()
if !unminedTxHash.IsEqual(&spendTxHash) {
t.Fatalf("mismatch tx hashes: expected %v, got %v",
spendTxHash, unminedTxHash)
}
})
// Now that an unconfirmed spend exists, there should no longer be any
// confirmed balance. The total balance should now all be unconfirmed
// and it should match the change amount of the unconfirmed spend
// tranasction.
checkBalance(0, false)
checkBalance(btcutil.Amount(changeAmount), true)
// Now, we'll remove the unconfirmed spend tranaction from the store.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.RemoveUnminedTx(ns, spendTxRec); err != nil {
t.Fatal(err)
}
})
// We'll query the store one last time for its unconfirmed transactions
// to ensure the unconfirmed spend was properly removed above.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
unminedTxs, err := store.UnminedTxs(ns)
if err != nil {
t.Fatalf("unable to query for unmined txs: %v", err)
}
if len(unminedTxs) != 0 {
t.Fatalf("expected 0 mined txs, instead got %v",
len(unminedTxs))
}
})
// Finally, the total balance (including confirmed and unconfirmed)
// should once again match the initial balance, as the uncofirmed spend
// has already been removed.
checkBalance(btcutil.Amount(initialBalance), false)
checkBalance(btcutil.Amount(initialBalance), true)
}
// TestInsertMempoolTxAlreadyConfirmed ensures that transactions that already
// exist within the store as confirmed cannot be added as unconfirmed.
func TestInsertMempoolTxAlreadyConfirmed(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// In order to reproduce real-world scenarios, we'll use a new database
// transaction for each interaction with the wallet.
//
// We'll start off the test by creating a new coinbase output at height
// 100 and inserting it into the store.
b100 := &BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
tx := newCoinBase(1e8)
txRec, err := NewTxRecordFromMsgTx(tx, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, txRec, b100); err != nil {
t.Fatal(err)
}
})
// checkStore is a helper we'll use to ensure the transaction only
// exists within the store's confirmed bucket.
checkStore := func() {
t.Helper()
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if existsRawUnmined(ns, txRec.Hash[:]) != nil {
t.Fatalf("expected transaction to not exist " +
"in unconfirmed bucket")
}
_, v := existsTxRecord(ns, &txRec.Hash, &b100.Block)
if v == nil {
t.Fatalf("expected transaction to exist in " +
"confirmed bucket")
}
})
}
checkStore()
// Inserting the transaction again as unconfirmed should result in a
// NOP, i.e., no error should be returned and no disk modifications are
// needed.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, txRec, nil); err != nil {
t.Fatal(err)
}
})
checkStore()
}
// TestInsertMempoolTxAfterSpentOutput ensures that transactions that were
// both confirmed and spent cannot be added as unconfirmed.
func TestInsertMempoolTxAfterSpentOutput(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// First we add a confirmed transaction to the wallet.
b100 := BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb := newCoinBase(1e8)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec, &b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec, &b100, 0, false)
if err != nil {
t.Fatal(err)
}
})
// Then create a transaction that spends the previous tx output.
b101 := BlockMeta{
Block: Block{Height: 101},
Time: time.Now(),
}
amt := int64(1e7)
spend := spendOutput(&cbRec.Hash, 0, amt)
spendRec, err := NewTxRecordFromMsgTx(spend, time.Now())
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
// We add the spending tx to the wallet as confirmed.
err := store.InsertTx(ns, spendRec, &b101)
if err != nil {
t.Fatal(err)
}
err = store.AddCredit(ns, spendRec, &b101, 0, false)
if err != nil {
t.Fatal(err)
}
// We now adding the original transaction as mempool to simulate
// a real case where trying to broadcast a tx after it has been
// confirmed and spent.
if err := store.InsertTx(ns, cbRec, nil); err != nil {
t.Fatal(err)
}
err = store.AddCredit(ns, cbRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
// now we check that there no unminedCredit exists for the original tx.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
k := canonicalOutPoint(&cbRec.Hash, 0)
if existsRawUnminedCredit(ns, k) != nil {
t.Fatalf("expected output to not exist " +
"in unmined credit bucket")
}
})
}
// TestOutputsAfterRemoveDoubleSpend ensures that when we remove a transaction
// that double spends an existing output within the wallet, it doesn't remove
// any other spending transactions of the same output.
func TestOutputsAfterRemoveDoubleSpend(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// In order to reproduce real-world scenarios, we'll use a new database
// transaction for each interaction with the wallet.
//
// We'll start off the test by creating a new coinbase output at height
// 100 and inserting it into the store.
b100 := BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb := newCoinBase(1e8)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec, &b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
// We'll create three spending transactions for the same output and add
// them to the store.
const numSpendRecs = 3
spendRecs := make([]*TxRecord, 0, numSpendRecs)
for i := 0; i < numSpendRecs; i++ {
amt := int64((i + 1) * 1e7)
spend := spendOutput(&cbRec.Hash, 0, amt)
spendRec, err := NewTxRecordFromMsgTx(spend, time.Now())
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
err := store.InsertTx(ns, spendRec, nil)
if err != nil {
t.Fatal(err)
}
err = store.AddCredit(ns, spendRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
spendRecs = append(spendRecs, spendRec)
}
// checkOutputs is a helper closure we'll use to ensure none of the
// other outputs from spending transactions have been removed from the
// store just because we removed one of the spending transactions.
checkOutputs := func(txs ...*TxRecord) {
t.Helper()
ops := make(map[wire.OutPoint]struct{})
for _, tx := range txs {
for i := range tx.MsgTx.TxOut {
ops[wire.OutPoint{
Hash: tx.Hash,
Index: uint32(i),
}] = struct{}{}
}
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
t.Helper()
outputs, err := store.UnspentOutputs(ns)
if err != nil {
t.Fatalf("unable to get unspent outputs: %v", err)
}
if len(outputs) != len(ops) {
t.Fatalf("expected %d outputs, got %d", len(ops),
len(outputs))
}
for _, output := range outputs {
op := output.OutPoint
if _, ok := ops[op]; !ok {
t.Fatalf("found unexpected output %v", op)
}
}
})
}
// All of the outputs of our spending transactions should exist.
checkOutputs(spendRecs...)
// We'll then remove the last transaction we crafted from the store and
// check our outputs again to ensure they still exist.
spendToRemove := spendRecs[numSpendRecs-1]
spendRecs = spendRecs[:numSpendRecs-1]
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.RemoveUnminedTx(ns, spendToRemove); err != nil {
t.Fatalf("unable to remove unmined transaction: %v", err)
}
})
checkOutputs(spendRecs...)
}
// commitDBTx is a helper function that allows us to perform multiple operations
// on a specific database's bucket as a single atomic operation.
func commitDBTx(t *testing.T, store *Store, db walletdb.DB,
f func(walletdb.ReadWriteBucket)) {
t.Helper()
dbTx, err := db.BeginReadWriteTx()
if err != nil {
t.Fatal(err)
}
defer dbTx.Commit()
ns := dbTx.ReadWriteBucket(namespaceKey)
f(ns)
}
// testInsertDoubleSpendTx is a helper test which double spends an output. The
// boolean parameter indicates whether the first spending transaction should be
// the one confirmed. This test ensures that when a double spend occurs and both
// spending transactions are present in the mempool, if one of them confirms,
// then the remaining conflicting transactions within the mempool should be
// removed from the wallet's store.
func testInsertMempoolDoubleSpendTx(t *testing.T, first bool) {
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// In order to reproduce real-world scenarios, we'll use a new database
// transaction for each interaction with the wallet.
//
// We'll start off the test by creating a new coinbase output at height
// 100 and inserting it into the store.
b100 := BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb := newCoinBase(1e8)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec, &b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec, &b100, 0, false)
if err != nil {
t.Fatal(err)
}
})
// Then, we'll create two spends from the same coinbase output, in order
// to replicate a double spend scenario.
firstSpend := spendOutput(&cbRec.Hash, 0, 5e7, 5e7)
firstSpendRec, err := NewTxRecordFromMsgTx(firstSpend, time.Now())
if err != nil {
t.Fatal(err)
}
secondSpend := spendOutput(&cbRec.Hash, 0, 4e7, 6e7)
secondSpendRec, err := NewTxRecordFromMsgTx(secondSpend, time.Now())
if err != nil {
t.Fatal(err)
}
// We'll insert both of them into the store without confirming them.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, firstSpendRec, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, firstSpendRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, secondSpendRec, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, secondSpendRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
// Ensure that both spends are found within the unconfirmed transactions
// in the wallet's store.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
unminedTxs, err := store.UnminedTxs(ns)
if err != nil {
t.Fatal(err)
}
if len(unminedTxs) != 2 {
t.Fatalf("expected 2 unmined txs, got %v",
len(unminedTxs))
}
})
// Then, we'll confirm either the first or second spend, depending on
// the boolean passed, with a height deep enough that allows us to
// succesfully spend the coinbase output.
coinbaseMaturity := int32(chaincfg.TestNet3Params.CoinbaseMaturity)
bMaturity := BlockMeta{
Block: Block{Height: b100.Height + coinbaseMaturity},
Time: time.Now(),
}
var confirmedSpendRec *TxRecord
if first {
confirmedSpendRec = firstSpendRec
} else {
confirmedSpendRec = secondSpendRec
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
err := store.InsertTx(ns, confirmedSpendRec, &bMaturity)
if err != nil {
t.Fatal(err)
}
err = store.AddCredit(
ns, confirmedSpendRec, &bMaturity, 0, false,
)
if err != nil {
t.Fatal(err)
}
})
// This should now trigger the store to remove any other pending double
// spends for this coinbase output, as we've already seen the confirmed
// one. Therefore, we shouldn't see any other unconfirmed transactions
// within it. We also ensure that the transaction that confirmed and is
// now listed as a UTXO within the wallet is the correct one.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
unminedTxs, err := store.UnminedTxs(ns)
if err != nil {
t.Fatal(err)
}
if len(unminedTxs) != 0 {
t.Fatalf("expected 0 unmined txs, got %v",
len(unminedTxs))
}
minedTxs, err := store.UnspentOutputs(ns)
if err != nil {
t.Fatal(err)
}
if len(minedTxs) != 1 {
t.Fatalf("expected 1 mined tx, got %v", len(minedTxs))
}
if !minedTxs[0].Hash.IsEqual(&confirmedSpendRec.Hash) {
t.Fatalf("expected confirmed tx hash %v, got %v",
confirmedSpendRec.Hash, minedTxs[0].Hash)
}
})
}
// TestInsertMempoolDoubleSpendConfirmedFirstTx ensures that when a double spend
// occurs and both spending transactions are present in the mempool, if the
// first spend seen is confirmed, then the second spend transaction within the
// mempool should be removed from the wallet's store.
func TestInsertMempoolDoubleSpendConfirmedFirstTx(t *testing.T) {
t.Parallel()
testInsertMempoolDoubleSpendTx(t, true)
}
// TestInsertMempoolDoubleSpendConfirmedFirstTx ensures that when a double spend
// occurs and both spending transactions are present in the mempool, if the
// second spend seen is confirmed, then the first spend transaction within the
// mempool should be removed from the wallet's store.
func TestInsertMempoolDoubleSpendConfirmSecondTx(t *testing.T) {
t.Parallel()
testInsertMempoolDoubleSpendTx(t, false)
}
// TestInsertConfirmedDoubleSpendTx tests that when one or more double spends
// occur and a spending transaction confirms that was not known to the wallet,
// then the unconfirmed double spends within the mempool should be removed from
// the wallet's store.
func TestInsertConfirmedDoubleSpendTx(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// In order to reproduce real-world scenarios, we'll use a new database
// transaction for each interaction with the wallet.
//
// We'll start off the test by creating a new coinbase output at height
// 100 and inserting it into the store.
b100 := BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb1 := newCoinBase(1e8)
cbRec1, err := NewTxRecordFromMsgTx(cb1, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec1, &b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec1, &b100, 0, false)
if err != nil {
t.Fatal(err)
}
})
// Then, we'll create three spends from the same coinbase output. The
// first two will remain unconfirmed, while the last should confirm and
// remove the remaining unconfirmed from the wallet's store.
firstSpend1 := spendOutput(&cbRec1.Hash, 0, 5e7)
firstSpendRec1, err := NewTxRecordFromMsgTx(firstSpend1, time.Now())
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, firstSpendRec1, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, firstSpendRec1, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
secondSpend1 := spendOutput(&cbRec1.Hash, 0, 4e7)
secondSpendRec1, err := NewTxRecordFromMsgTx(secondSpend1, time.Now())
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, secondSpendRec1, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, secondSpendRec1, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
// We'll also create another output and have one unconfirmed and one
// confirmed spending transaction also spend it.
cb2 := newCoinBase(2e8)
cbRec2, err := NewTxRecordFromMsgTx(cb2, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec2, &b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec2, &b100, 0, false)
if err != nil {
t.Fatal(err)
}
})
firstSpend2 := spendOutput(&cbRec2.Hash, 0, 5e7)
firstSpendRec2, err := NewTxRecordFromMsgTx(firstSpend2, time.Now())
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, firstSpendRec2, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, firstSpendRec2, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
// At this point, we should see all unconfirmed transactions within the
// store.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
unminedTxs, err := store.UnminedTxs(ns)
if err != nil {
t.Fatal(err)
}
if len(unminedTxs) != 3 {
t.Fatalf("expected 3 unmined txs, got %d",
len(unminedTxs))
}
})
// Then, we'll insert the confirmed spend at a height deep enough that
// allows us to successfully spend the coinbase outputs.
coinbaseMaturity := int32(chaincfg.TestNet3Params.CoinbaseMaturity)
bMaturity := BlockMeta{
Block: Block{Height: b100.Height + coinbaseMaturity},
Time: time.Now(),
}
outputsToSpend := []wire.OutPoint{
{Hash: cbRec1.Hash, Index: 0},
{Hash: cbRec2.Hash, Index: 0},
}
confirmedSpend := spendOutputs(outputsToSpend, 3e7)
confirmedSpendRec, err := NewTxRecordFromMsgTx(
confirmedSpend, bMaturity.Time,
)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
err := store.InsertTx(ns, confirmedSpendRec, &bMaturity)
if err != nil {
t.Fatal(err)
}
err = store.AddCredit(
ns, confirmedSpendRec, &bMaturity, 0, false,
)
if err != nil {
t.Fatal(err)
}
})
// Now that the confirmed spend exists within the store, we should no
// longer see the unconfirmed spends within it. We also ensure that the
// transaction that confirmed and is now listed as a UTXO within the
// wallet is the correct one.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
unminedTxs, err := store.UnminedTxs(ns)
if err != nil {
t.Fatal(err)
}
if len(unminedTxs) != 0 {
t.Fatalf("expected 0 unmined txs, got %v",
len(unminedTxs))
}
minedTxs, err := store.UnspentOutputs(ns)
if err != nil {
t.Fatal(err)
}
if len(minedTxs) != 1 {
t.Fatalf("expected 1 mined tx, got %v", len(minedTxs))
}
if !minedTxs[0].Hash.IsEqual(&confirmedSpendRec.Hash) {
t.Fatalf("expected confirmed tx hash %v, got %v",
confirmedSpend, minedTxs[0].Hash)
}
})
}
// TestAddDuplicateCreditAfterConfirm aims to test the case where a duplicate
// unconfirmed credit is added to the store after the intial credit has already
// confirmed. This can lead to outputs being duplicated in the store, which can
// lead to creating double spends when querying the wallet's UTXO set.
func TestAddDuplicateCreditAfterConfirm(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// In order to reproduce real-world scenarios, we'll use a new database
// transaction for each interaction with the wallet.
//
// We'll start off the test by creating a new coinbase output at height
// 100 and inserting it into the store.
b100 := &BlockMeta{
Block: Block{Height: 100},
Time: time.Now(),
}
cb := newCoinBase(1e8)
cbRec, err := NewTxRecordFromMsgTx(cb, b100.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, cbRec, b100); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, cbRec, b100, 0, false)
if err != nil {
t.Fatal(err)
}
})
// We'll confirm that there is one unspent output in the store, which
// should be the coinbase output created above.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
minedTxs, err := store.UnspentOutputs(ns)
if err != nil {
t.Fatal(err)
}
if len(minedTxs) != 1 {
t.Fatalf("expected 1 mined tx, got %v", len(minedTxs))
}
if !minedTxs[0].Hash.IsEqual(&cbRec.Hash) {
t.Fatalf("expected tx hash %v, got %v", cbRec.Hash,
minedTxs[0].Hash)
}
})
// Then, we'll create an unconfirmed spend for the coinbase output.
b101 := &BlockMeta{
Block: Block{Height: 101},
Time: time.Now(),
}
spendTx := spendOutput(&cbRec.Hash, 0, 5e7, 4e7)
spendTxRec, err := NewTxRecordFromMsgTx(spendTx, b101.Time)
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, spendTxRec, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, spendTxRec, nil, 1, true)
if err != nil {
t.Fatal(err)
}
})
// Confirm the spending transaction at the next height.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, spendTxRec, b101); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, spendTxRec, b101, 1, true)
if err != nil {
t.Fatal(err)
}
})
// We should see one unspent output within the store once again, this
// time being the change output of the spending transaction.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
minedTxs, err := store.UnspentOutputs(ns)
if err != nil {
t.Fatal(err)
}
if len(minedTxs) != 1 {
t.Fatalf("expected 1 mined txs, got %v", len(minedTxs))
}
if !minedTxs[0].Hash.IsEqual(&spendTxRec.Hash) {
t.Fatalf("expected tx hash %v, got %v", spendTxRec.Hash,
minedTxs[0].Hash)
}
})
// Now, we'll insert the spending transaction once again, this time as
// unconfirmed. This can happen if the backend happens to forward an
// unconfirmed chain.RelevantTx notification to the client even after it
// has confirmed, which results in us adding it to the store once again.
//
// TODO(wilmer): ideally this shouldn't happen, so we should identify
// the real reason for this.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, spendTxRec, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, spendTxRec, nil, 1, true)
if err != nil {
t.Fatal(err)
}
})
// Finally, we'll ensure the change output is still the only unspent
// output within the store.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
minedTxs, err := store.UnspentOutputs(ns)
if err != nil {
t.Fatal(err)
}
if len(minedTxs) != 1 {
t.Fatalf("expected 1 mined txs, got %v", len(minedTxs))
}
if !minedTxs[0].Hash.IsEqual(&spendTxRec.Hash) {
t.Fatalf("expected tx hash %v, got %v", spendTxRec.Hash,
minedTxs[0].Hash)
}
})
}
// TestInsertMempoolTxAndConfirm ensures that there aren't any lingering
// unconfirmed records for a transaction that existed within the store as
// unconfirmed before becoming confirmed.
func TestInsertMempoolTxAndConfirm(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// Create a transaction which we'll insert into the store as
// unconfirmed.
tx := newCoinBase(1e8)
txRec, err := NewTxRecordFromMsgTx(tx, time.Now())
if err != nil {
t.Fatal(err)
}
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
if err := store.InsertTx(ns, txRec, nil); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, txRec, nil, 0, false)
if err != nil {
t.Fatal(err)
}
})
// Then, proceed to confirm it.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
block := &BlockMeta{
Block: Block{Height: 1337},
Time: time.Now(),
}
if err := store.InsertTx(ns, txRec, block); err != nil {
t.Fatal(err)
}
err := store.AddCredit(ns, txRec, block, 0, false)
if err != nil {
t.Fatal(err)
}
})
// We should not see any lingering unconfirmed records for it once it's
// been confirmed.
commitDBTx(t, store, db, func(ns walletdb.ReadWriteBucket) {
for _, input := range tx.TxIn {
prevOut := input.PreviousOutPoint
k := canonicalOutPoint(&prevOut.Hash, prevOut.Index)
if existsRawUnminedInput(ns, k) != nil {
t.Fatalf("found transaction input %v as "+
"unconfirmed", prevOut)
}
}
if existsRawUnmined(ns, txRec.Hash[:]) != nil {
t.Fatal("found transaction as unconfirmed")
}
for i := range tx.TxOut {
k := canonicalOutPoint(&txRec.Hash, uint32(i))
if existsRawUnminedCredit(ns, k) != nil {
t.Fatalf("found transaction output %v as "+
"unconfirmed", i)
}
}
})
}
// TestTxLabel tests reading and writing of transaction labels.
func TestTxLabel(t *testing.T) {
t.Parallel()
store, db, teardown, err := testStore()
if err != nil {
t.Fatal(err)
}
defer teardown()
// txid is the transaction hash we will use to write and get labels for.
txid := TstRecvTx.Hash()
// txidNotFound is distinct from txid, and will not have a label written
// to disk.
txidNotFound := TstSpendingTx.Hash()
// getBucket gets the top level bucket, and fails the test if it is
// not found.
getBucket := func(tx walletdb.ReadWriteTx) walletdb.ReadWriteBucket {
testBucket := tx.ReadWriteBucket(namespaceKey)
if testBucket == nil {
t.Fatalf("could not get bucket: %v", err)
}
return testBucket
}
// tryPutLabel attempts to write a label to disk.
tryPutLabel := func(label string) error {
return walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
// Try to write the label to disk.
return store.PutTxLabel(getBucket(tx), *txid, label)
})
}
// tryReadLabel attempts to retrieve a label for a given txid.
tryReadLabel := func(labelTx chainhash.Hash) (string, error) {
var label string
err := walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
var err error
label, err = FetchTxLabel(getBucket(tx), labelTx)
return err
})
return label, err
}
// First, try to lookup a label when the labels bucket does not exist
// yet.
_, err = tryReadLabel(*txid)
if err != ErrNoLabelBucket {
t.Fatalf("expected: %v, got: %v", ErrNoLabelBucket, err)
}
// Now try to write an empty label, which should fail.
err = tryPutLabel("")
if err != ErrEmptyLabel {
t.Fatalf("expected: %v, got: %v", ErrEmptyLabel, err)
}
// Create a label which exceeds the length limit.
longLabel := make([]byte, TxLabelLimit+1)
err = tryPutLabel(string(longLabel))
if err != ErrLabelTooLong {
t.Fatalf("expected: %v, got: %v", ErrLabelTooLong, err)
}
// Write an acceptable length label to disk, this should succeed.
testLabel := "test label"
err = tryPutLabel(testLabel)
if err != nil {
t.Fatalf("expected: no error, got: %v", err)
}
diskLabel, err := tryReadLabel(*txid)
if err != nil {
t.Fatalf("expected: no error, got: %v", err)
}
if diskLabel != testLabel {
t.Fatalf("expected: %v, got: %v", testLabel, diskLabel)
}
// Finally, try to read a label for a transaction which does not have
// one.
_, err = tryReadLabel(*txidNotFound)
if err != ErrTxLabelNotFound {
t.Fatalf("expected: %v, got: %v", ErrTxLabelNotFound, err)
}
}