lbcwallet/wtxmgr/query_test.go

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// Copyright (c) 2015-2017 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
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package wtxmgr_test
import (
"bytes"
"encoding/binary"
"fmt"
"testing"
"time"
"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcwallet/walletdb"
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. "github.com/btcsuite/btcwallet/wtxmgr"
)
type queryState struct {
// slice items are ordered by height, mempool comes last.
blocks [][]TxDetails
txDetails map[chainhash.Hash][]TxDetails
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}
func newQueryState() *queryState {
return &queryState{
txDetails: make(map[chainhash.Hash][]TxDetails),
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}
}
func (q *queryState) deepCopy() *queryState {
cpy := newQueryState()
for _, blockDetails := range q.blocks {
var cpyDetails []TxDetails
for _, detail := range blockDetails {
cpyDetails = append(cpyDetails, *deepCopyTxDetails(&detail))
}
cpy.blocks = append(cpy.blocks, cpyDetails)
}
cpy.txDetails = make(map[chainhash.Hash][]TxDetails)
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for txHash, details := range q.txDetails {
detailsSlice := make([]TxDetails, len(details))
for i, detail := range details {
detailsSlice[i] = *deepCopyTxDetails(&detail)
}
cpy.txDetails[txHash] = detailsSlice
}
return cpy
}
func deepCopyTxDetails(d *TxDetails) *TxDetails {
cpy := *d
cpy.MsgTx = *d.MsgTx.Copy()
if cpy.SerializedTx != nil {
cpy.SerializedTx = make([]byte, len(cpy.SerializedTx))
copy(cpy.SerializedTx, d.SerializedTx)
}
cpy.Credits = make([]CreditRecord, len(d.Credits))
copy(cpy.Credits, d.Credits)
cpy.Debits = make([]DebitRecord, len(d.Debits))
copy(cpy.Debits, d.Debits)
return &cpy
}
func (q *queryState) compare(t *testing.T, s *Store, ns walletdb.ReadBucket, changeDesc string) {
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defer func() {
if t.Failed() {
t.Fatalf("Store state queries failed after '%s'", changeDesc)
}
}()
fwdBlocks := q.blocks
revBlocks := make([][]TxDetails, len(q.blocks))
copy(revBlocks, q.blocks)
for i := 0; i < len(revBlocks)/2; i++ {
revBlocks[i], revBlocks[len(revBlocks)-1-i] = revBlocks[len(revBlocks)-1-i], revBlocks[i]
}
checkBlock := func(blocks [][]TxDetails) func([]TxDetails) (bool, error) {
return func(got []TxDetails) (bool, error) {
if len(fwdBlocks) == 0 {
return false, fmt.Errorf("entered range when no more details expected")
}
exp := blocks[0]
if len(got) != len(exp) {
return false, fmt.Errorf("got len(details)=%d in transaction range, expected %d", len(got), len(exp))
}
for i := range got {
equalTxDetails(t, &got[i], &exp[i])
}
if t.Failed() {
return false, fmt.Errorf("Failed comparing range of transaction details")
}
blocks = blocks[1:]
return false, nil
}
}
err := s.RangeTransactions(ns, 0, -1, checkBlock(fwdBlocks))
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if err != nil {
t.Fatalf("Failed in RangeTransactions (forwards iteration): %v", err)
}
err = s.RangeTransactions(ns, -1, 0, checkBlock(revBlocks))
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if err != nil {
t.Fatalf("Failed in RangeTransactions (reverse iteration): %v", err)
}
for txHash, details := range q.txDetails {
for _, detail := range details {
blk := &detail.Block.Block
if blk.Height == -1 {
blk = nil
}
d, err := s.UniqueTxDetails(ns, &txHash, blk)
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if err != nil {
t.Fatal(err)
}
if d == nil {
t.Errorf("Found no matching transaction at height %d", detail.Block.Height)
continue
}
equalTxDetails(t, d, &detail)
}
if t.Failed() {
t.Fatalf("Failed querying unique details regarding transaction %v", txHash)
}
// For the most recent tx with this hash, check that
// TxDetails (not looking up a tx at any particular
// height) matches the last.
detail := &details[len(details)-1]
d, err := s.TxDetails(ns, &txHash)
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if err != nil {
t.Fatal(err)
}
equalTxDetails(t, d, detail)
if t.Failed() {
t.Fatalf("Failed querying latest details regarding transaction %v", txHash)
}
}
}
func equalTxDetails(t *testing.T, got, exp *TxDetails) {
// Need to avoid using reflect.DeepEqual against slices, since it
// returns false for nil vs non-nil zero length slices.
equalTxs(t, &got.MsgTx, &exp.MsgTx)
if got.Hash != exp.Hash {
t.Errorf("Found mismatched hashes")
t.Errorf("Got: %v", got.Hash)
t.Errorf("Expected: %v", exp.Hash)
}
if got.Received != exp.Received {
t.Errorf("Found mismatched receive time")
t.Errorf("Got: %v", got.Received)
t.Errorf("Expected: %v", exp.Received)
}
if !bytes.Equal(got.SerializedTx, exp.SerializedTx) {
t.Errorf("Found mismatched serialized txs")
t.Errorf("Got: %x", got.SerializedTx)
t.Errorf("Expected: %x", exp.SerializedTx)
}
if got.Block != exp.Block {
t.Errorf("Found mismatched block meta")
t.Errorf("Got: %v", got.Block)
t.Errorf("Expected: %v", exp.Block)
}
if len(got.Credits) != len(exp.Credits) {
t.Errorf("Credit slice lengths differ: Got %d Expected %d", len(got.Credits), len(exp.Credits))
} else {
for i := range got.Credits {
if got.Credits[i] != exp.Credits[i] {
t.Errorf("Found mismatched Credit[%d]", i)
t.Errorf("Got: %v", got.Credits[i])
t.Errorf("Expected: %v", exp.Credits[i])
}
}
}
if len(got.Debits) != len(exp.Debits) {
t.Errorf("Debit slice lengths differ: Got %d Expected %d", len(got.Debits), len(exp.Debits))
} else {
for i := range got.Debits {
if got.Debits[i] != exp.Debits[i] {
t.Errorf("Found mismatched Debit[%d]", i)
t.Errorf("Got: %v", got.Debits[i])
t.Errorf("Expected: %v", exp.Debits[i])
}
}
}
}
func equalTxs(t *testing.T, got, exp *wire.MsgTx) {
var bufGot, bufExp bytes.Buffer
err := got.Serialize(&bufGot)
if err != nil {
t.Fatal(err)
}
err = exp.Serialize(&bufExp)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(bufGot.Bytes(), bufExp.Bytes()) {
t.Errorf("Found unexpected wire.MsgTx:")
t.Errorf("Got: %v", got)
t.Errorf("Expected: %v", exp)
}
}
// Returns time.Now() with seconds resolution, this is what Store saves.
func timeNow() time.Time {
return time.Unix(time.Now().Unix(), 0)
}
// Returns a copy of a TxRecord without the serialized tx.
func stripSerializedTx(rec *TxRecord) *TxRecord {
ret := *rec
ret.SerializedTx = nil
return &ret
}
func makeBlockMeta(height int32) BlockMeta {
if height == -1 {
return BlockMeta{Block: Block{Height: -1}}
}
b := BlockMeta{
Block: Block{Height: height},
Time: timeNow(),
}
// Give it a fake block hash created from the height and time.
binary.LittleEndian.PutUint32(b.Hash[0:4], uint32(height))
binary.LittleEndian.PutUint64(b.Hash[4:12], uint64(b.Time.Unix()))
return b
}
func TestStoreQueries(t *testing.T) {
t.Parallel()
type queryTest struct {
desc string
updates func(ns walletdb.ReadWriteBucket) // Unwinds from t.Fatal if the update errors.
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state *queryState
}
var tests []queryTest
// Create the store and test initial state.
s, db, teardown, err := testStore()
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defer teardown()
if err != nil {
t.Fatal(err)
}
lastState := newQueryState()
tests = append(tests, queryTest{
desc: "initial store",
updates: func(walletdb.ReadWriteBucket) {},
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state: lastState,
})
// simplify error handling
insertTx := func(ns walletdb.ReadWriteBucket, rec *TxRecord, block *BlockMeta) {
err := s.InsertTx(ns, rec, block)
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if err != nil {
t.Fatal(err)
}
}
addCredit := func(s *Store, ns walletdb.ReadWriteBucket, rec *TxRecord, block *BlockMeta, index uint32, change bool) {
err := s.AddCredit(ns, rec, block, index, change)
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if err != nil {
t.Fatal(err)
}
}
newTxRecordFromMsgTx := func(tx *wire.MsgTx, received time.Time) *TxRecord {
rec, err := NewTxRecordFromMsgTx(tx, received)
if err != nil {
t.Fatal(err)
}
return rec
}
rollback := func(ns walletdb.ReadWriteBucket, height int32) {
err := s.Rollback(ns, height)
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if err != nil {
t.Fatal(err)
}
}
// Insert an unmined transaction. Mark no credits yet.
txA := spendOutput(&chainhash.Hash{}, 0, 100e8)
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recA := newTxRecordFromMsgTx(txA, timeNow())
newState := lastState.deepCopy()
newState.blocks = [][]TxDetails{
{
{
TxRecord: *stripSerializedTx(recA),
Block: BlockMeta{Block: Block{Height: -1}},
},
},
}
newState.txDetails[recA.Hash] = []TxDetails{
newState.blocks[0][0],
}
lastState = newState
tests = append(tests, queryTest{
desc: "insert tx A unmined",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recA, nil) },
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state: newState,
})
// Add txA:0 as a change credit.
newState = lastState.deepCopy()
newState.blocks[0][0].Credits = []CreditRecord{
{
Index: 0,
Amount: btcutil.Amount(recA.MsgTx.TxOut[0].Value),
Spent: false,
Change: true,
},
}
newState.txDetails[recA.Hash][0].Credits = newState.blocks[0][0].Credits
lastState = newState
tests = append(tests, queryTest{
desc: "mark unconfirmed txA:0 as credit",
updates: func(ns walletdb.ReadWriteBucket) { addCredit(s, ns, recA, nil, 0, true) },
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state: newState,
})
// Insert another unmined transaction which spends txA:0, splitting the
// amount into outputs of 40 and 60 BTC.
txB := spendOutput(&recA.Hash, 0, 40e8, 60e8)
recB := newTxRecordFromMsgTx(txB, timeNow())
newState = lastState.deepCopy()
newState.blocks[0][0].Credits[0].Spent = true
newState.blocks[0] = append(newState.blocks[0], TxDetails{
TxRecord: *stripSerializedTx(recB),
Block: BlockMeta{Block: Block{Height: -1}},
Debits: []DebitRecord{
{
Amount: btcutil.Amount(recA.MsgTx.TxOut[0].Value),
Index: 0, // recB.MsgTx.TxIn index
},
},
})
newState.txDetails[recA.Hash][0].Credits[0].Spent = true
newState.txDetails[recB.Hash] = []TxDetails{newState.blocks[0][1]}
lastState = newState
tests = append(tests, queryTest{
desc: "insert tx B unmined",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recB, nil) },
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state: newState,
})
newState = lastState.deepCopy()
newState.blocks[0][1].Credits = []CreditRecord{
{
Index: 0,
Amount: btcutil.Amount(recB.MsgTx.TxOut[0].Value),
Spent: false,
Change: false,
},
}
newState.txDetails[recB.Hash][0].Credits = newState.blocks[0][1].Credits
lastState = newState
tests = append(tests, queryTest{
desc: "mark txB:0 as non-change credit",
updates: func(ns walletdb.ReadWriteBucket) { addCredit(s, ns, recB, nil, 0, false) },
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state: newState,
})
// Mine tx A at block 100. Leave tx B unmined.
b100 := makeBlockMeta(100)
newState = lastState.deepCopy()
newState.blocks[0] = newState.blocks[0][:1]
newState.blocks[0][0].Block = b100
newState.blocks = append(newState.blocks, lastState.blocks[0][1:])
newState.txDetails[recA.Hash][0].Block = b100
lastState = newState
tests = append(tests, queryTest{
desc: "mine tx A",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recA, &b100) },
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state: newState,
})
// Mine tx B at block 101.
b101 := makeBlockMeta(101)
newState = lastState.deepCopy()
newState.blocks[1][0].Block = b101
newState.txDetails[recB.Hash][0].Block = b101
lastState = newState
tests = append(tests, queryTest{
desc: "mine tx B",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recB, &b101) },
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state: newState,
})
for _, tst := range tests {
err := walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns := tx.ReadWriteBucket(namespaceKey)
tst.updates(ns)
tst.state.compare(t, s, ns, tst.desc)
return nil
})
if err != nil {
t.Fatal(err)
}
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}
// Run some additional query tests with the current store's state:
// - Verify that querying for a transaction not in the store returns
// nil without failure.
// - Verify that querying for a unique transaction at the wrong block
// returns nil without failure.
// - Verify that breaking early on RangeTransactions stops further
// iteration.
err = walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns := tx.ReadWriteBucket(namespaceKey)
missingTx := spendOutput(&recB.Hash, 0, 40e8)
missingRec := newTxRecordFromMsgTx(missingTx, timeNow())
missingBlock := makeBlockMeta(102)
missingDetails, err := s.TxDetails(ns, &missingRec.Hash)
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if err != nil {
t.Fatal(err)
}
if missingDetails != nil {
t.Errorf("Expected no details, found details for tx %v", missingDetails.Hash)
}
missingUniqueTests := []struct {
hash *chainhash.Hash
block *Block
}{
{&missingRec.Hash, &b100.Block},
{&missingRec.Hash, &missingBlock.Block},
{&missingRec.Hash, nil},
{&recB.Hash, &b100.Block},
{&recB.Hash, &missingBlock.Block},
{&recB.Hash, nil},
}
for _, tst := range missingUniqueTests {
missingDetails, err = s.UniqueTxDetails(ns, tst.hash, tst.block)
if err != nil {
t.Fatal(err)
}
if missingDetails != nil {
t.Errorf("Expected no details, found details for tx %v", missingDetails.Hash)
}
}
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iterations := 0
err = s.RangeTransactions(ns, 0, -1, func([]TxDetails) (bool, error) {
iterations++
return true, nil
})
if iterations != 1 {
t.Errorf("RangeTransactions (forwards) ran func %d times", iterations)
}
iterations = 0
err = s.RangeTransactions(ns, -1, 0, func([]TxDetails) (bool, error) {
iterations++
return true, nil
})
if iterations != 1 {
t.Errorf("RangeTransactions (reverse) ran func %d times", iterations)
}
// Make sure it also breaks early after one iteration through unmined transactions.
rollback(ns, b101.Height)
iterations = 0
err = s.RangeTransactions(ns, -1, 0, func([]TxDetails) (bool, error) {
iterations++
return true, nil
})
if iterations != 1 {
t.Errorf("RangeTransactions (reverse) ran func %d times", iterations)
}
return nil
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})
if err != nil {
t.Fatal(err)
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}
// None of the above tests have tested RangeTransactions with multiple
// txs per block, so do that now. Start by moving tx B to block 100
// (same block as tx A), and then rollback from block 100 onwards so
// both are unmined.
newState = lastState.deepCopy()
newState.blocks[0] = append(newState.blocks[0], newState.blocks[1]...)
newState.blocks[0][1].Block = b100
newState.blocks = newState.blocks[:1]
newState.txDetails[recB.Hash][0].Block = b100
lastState = newState
tests = append(tests[:0:0], queryTest{
desc: "move tx B to block 100",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recB, &b100) },
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state: newState,
})
newState = lastState.deepCopy()
newState.blocks[0][0].Block = makeBlockMeta(-1)
newState.blocks[0][1].Block = makeBlockMeta(-1)
newState.txDetails[recA.Hash][0].Block = makeBlockMeta(-1)
newState.txDetails[recB.Hash][0].Block = makeBlockMeta(-1)
lastState = newState
tests = append(tests, queryTest{
desc: "rollback block 100",
updates: func(ns walletdb.ReadWriteBucket) { rollback(ns, b100.Height) },
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state: newState,
})
// None of the above tests have tested transactions with colliding
// hashes, so mine tx A in block 100, and then insert tx A again
// unmined. Also mine tx A in block 101 (this moves it from unmined).
// This is a valid test because the store does not perform signature
// validation or keep a full utxo set, and duplicated transaction hashes
// from different blocks are allowed so long as all previous outputs are
// spent.
newState = lastState.deepCopy()
newState.blocks = append(newState.blocks, newState.blocks[0][1:])
newState.blocks[0] = newState.blocks[0][:1:1]
newState.blocks[0][0].Block = b100
newState.blocks[1] = []TxDetails{
{
TxRecord: *stripSerializedTx(recA),
Block: makeBlockMeta(-1),
},
newState.blocks[1][0],
}
newState.txDetails[recA.Hash][0].Block = b100
newState.txDetails[recA.Hash] = append(newState.txDetails[recA.Hash], newState.blocks[1][0])
lastState = newState
tests = append(tests, queryTest{
desc: "insert duplicate tx A",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recA, &b100); insertTx(ns, recA, nil) },
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state: newState,
})
newState = lastState.deepCopy()
newState.blocks = [][]TxDetails{
newState.blocks[0],
{newState.blocks[1][0]},
{newState.blocks[1][1]},
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}
newState.blocks[1][0].Block = b101
newState.txDetails[recA.Hash][1].Block = b101
lastState = newState
tests = append(tests, queryTest{
desc: "mine duplicate tx A",
updates: func(ns walletdb.ReadWriteBucket) { insertTx(ns, recA, &b101) },
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state: newState,
})
for _, tst := range tests {
err := walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns := tx.ReadWriteBucket(namespaceKey)
tst.updates(ns)
tst.state.compare(t, s, ns, tst.desc)
return nil
})
if err != nil {
t.Fatal(err)
}
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}
}
func TestPreviousPkScripts(t *testing.T) {
t.Parallel()
s, db, teardown, err := testStore()
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defer teardown()
if err != nil {
t.Fatal(err)
}
// Invalid scripts but sufficient for testing.
var (
scriptA0 = []byte("tx A output 0")
scriptA1 = []byte("tx A output 1")
scriptB0 = []byte("tx B output 0")
scriptB1 = []byte("tx B output 1")
scriptC0 = []byte("tx C output 0")
scriptC1 = []byte("tx C output 1")
)
// Create a transaction spending two prevous outputs and generating two
// new outputs the passed pkScipts. Spends outputs 0 and 1 from prevHash.
buildTx := func(prevHash *chainhash.Hash, script0, script1 []byte) *wire.MsgTx {
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return &wire.MsgTx{
TxIn: []*wire.TxIn{
{PreviousOutPoint: wire.OutPoint{
Hash: *prevHash,
Index: 0,
}},
{PreviousOutPoint: wire.OutPoint{
Hash: *prevHash, Index: 1,
}},
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},
TxOut: []*wire.TxOut{
{Value: 1e8, PkScript: script0},
{Value: 1e8, PkScript: script1},
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},
}
}
newTxRecordFromMsgTx := func(tx *wire.MsgTx) *TxRecord {
rec, err := NewTxRecordFromMsgTx(tx, timeNow())
if err != nil {
t.Fatal(err)
}
return rec
}
// Create transactions with the fake output scripts.
var (
txA = buildTx(&chainhash.Hash{}, scriptA0, scriptA1)
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recA = newTxRecordFromMsgTx(txA)
txB = buildTx(&recA.Hash, scriptB0, scriptB1)
recB = newTxRecordFromMsgTx(txB)
txC = buildTx(&recB.Hash, scriptC0, scriptC1)
recC = newTxRecordFromMsgTx(txC)
txD = buildTx(&recC.Hash, nil, nil)
recD = newTxRecordFromMsgTx(txD)
)
insertTx := func(ns walletdb.ReadWriteBucket, rec *TxRecord, block *BlockMeta) {
err := s.InsertTx(ns, rec, block)
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if err != nil {
t.Fatal(err)
}
}
addCredit := func(ns walletdb.ReadWriteBucket, rec *TxRecord, block *BlockMeta, index uint32) {
err := s.AddCredit(ns, rec, block, index, false)
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if err != nil {
t.Fatal(err)
}
}
type scriptTest struct {
rec *TxRecord
block *Block
scripts [][]byte
}
runTest := func(ns walletdb.ReadWriteBucket, tst *scriptTest) {
scripts, err := s.PreviousPkScripts(ns, tst.rec, tst.block)
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if err != nil {
t.Fatal(err)
}
height := int32(-1)
if tst.block != nil {
height = tst.block.Height
}
if len(scripts) != len(tst.scripts) {
t.Errorf("Transaction %v height %d: got len(scripts)=%d, expected %d",
tst.rec.Hash, height, len(scripts), len(tst.scripts))
return
}
for i := range scripts {
if !bytes.Equal(scripts[i], tst.scripts[i]) {
// Format scripts with %s since they are (should be) ascii.
t.Errorf("Transaction %v height %d script %d: got '%s' expected '%s'",
tst.rec.Hash, height, i, scripts[i], tst.scripts[i])
}
}
}
dbtx, err := db.BeginReadWriteTx()
if err != nil {
t.Fatal(err)
}
defer dbtx.Commit()
ns := dbtx.ReadWriteBucket(namespaceKey)
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// Insert transactions A-C unmined, but mark no credits yet. Until
// these are marked as credits, PreviousPkScripts should not return
// them.
insertTx(ns, recA, nil)
insertTx(ns, recB, nil)
insertTx(ns, recC, nil)
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b100 := makeBlockMeta(100)
b101 := makeBlockMeta(101)
tests := []scriptTest{
{recA, nil, nil},
{recA, &b100.Block, nil},
{recB, nil, nil},
{recB, &b100.Block, nil},
{recC, nil, nil},
{recC, &b100.Block, nil},
}
for _, tst := range tests {
runTest(ns, &tst)
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}
if t.Failed() {
t.Fatal("Failed after unmined tx inserts")
}
// Mark credits. Tx C output 1 not marked as a credit: tx D will spend
// both later but when C is mined, output 1's script should not be
// returned.
addCredit(ns, recA, nil, 0)
addCredit(ns, recA, nil, 1)
addCredit(ns, recB, nil, 0)
addCredit(ns, recB, nil, 1)
addCredit(ns, recC, nil, 0)
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tests = []scriptTest{
{recA, nil, nil},
{recA, &b100.Block, nil},
{recB, nil, [][]byte{scriptA0, scriptA1}},
{recB, &b100.Block, nil},
{recC, nil, [][]byte{scriptB0, scriptB1}},
{recC, &b100.Block, nil},
}
for _, tst := range tests {
runTest(ns, &tst)
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}
if t.Failed() {
t.Fatal("Failed after marking unmined credits")
}
// Mine tx A in block 100. Test results should be identical.
insertTx(ns, recA, &b100)
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for _, tst := range tests {
runTest(ns, &tst)
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}
if t.Failed() {
t.Fatal("Failed after mining tx A")
}
// Mine tx B in block 101.
insertTx(ns, recB, &b101)
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tests = []scriptTest{
{recA, nil, nil},
{recA, &b100.Block, nil},
{recB, nil, nil},
{recB, &b101.Block, [][]byte{scriptA0, scriptA1}},
{recC, nil, [][]byte{scriptB0, scriptB1}},
{recC, &b101.Block, nil},
}
for _, tst := range tests {
runTest(ns, &tst)
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}
if t.Failed() {
t.Fatal("Failed after mining tx B")
}
// Mine tx C in block 101 (same block as tx B) to test debits from the
// same block.
insertTx(ns, recC, &b101)
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tests = []scriptTest{
{recA, nil, nil},
{recA, &b100.Block, nil},
{recB, nil, nil},
{recB, &b101.Block, [][]byte{scriptA0, scriptA1}},
{recC, nil, nil},
{recC, &b101.Block, [][]byte{scriptB0, scriptB1}},
}
for _, tst := range tests {
runTest(ns, &tst)
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}
if t.Failed() {
t.Fatal("Failed after mining tx C")
}
// Insert tx D, which spends C:0 and C:1. However, only C:0 is marked
// as a credit, and only that output script should be returned.
insertTx(ns, recD, nil)
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tests = append(tests, scriptTest{recD, nil, [][]byte{scriptC0}})
tests = append(tests, scriptTest{recD, &b101.Block, nil})
for _, tst := range tests {
runTest(ns, &tst)
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}
if t.Failed() {
t.Fatal("Failed after inserting tx D")
}
}