// NewTx returns a new instance of a transaction given an underlying
// wire.MsgTx. See Tx.
func NewTx(msgTx *wire.MsgTx) *Tx {
return &Tx{
hash: msgTx.TxSha(),
msgTx: msgTx,
txTree: TxTreeUnknown,
txIndex: TxIndexUnknown,
}
}
// NewTxFromReader returns a new instance of a transaction given a
// Reader to deserialize the transaction. See Tx.
func NewTxFromReader(r io.Reader) (*Tx, error) {
// Deserialize the bytes into a MsgTx.
var msgTx wire.MsgTx
err := msgTx.Deserialize(r)
if err != nil {
return nil, err
}
t := Tx{
hash: msgTx.TxSha(),
msgTx: &msgTx,
txTree: TxTreeUnknown,
txIndex: TxIndexUnknown,
}
return &t, nil
}
// NewTxDeepTxIns is used to deep copy a transaction, maintaining the old
// pointers to the TxOuts while replacing the old pointers to the TxIns with
// deep copies. This is to prevent races when the fraud proofs for the
// transactions are set by the miner.
func NewTxDeepTxIns(msgTx *wire.MsgTx) *Tx {
if msgTx == nil {
return nil
}
newMsgTx := new(wire.MsgTx)
// Copy the fixed fields.
newMsgTx.Version = msgTx.Version
newMsgTx.LockTime = msgTx.LockTime
newMsgTx.Expiry = msgTx.Expiry
// Copy the TxIns deeply.
for _, txIn := range msgTx.TxIn {
sigScrLen := len(txIn.SignatureScript)
sigScrCopy := make([]byte, sigScrLen, sigScrLen)
txInCopy := new(wire.TxIn)
txInCopy.PreviousOutPoint.Hash = txIn.PreviousOutPoint.Hash
txInCopy.PreviousOutPoint.Index = txIn.PreviousOutPoint.Index
txInCopy.PreviousOutPoint.Tree = txIn.PreviousOutPoint.Tree
txInCopy.Sequence = txIn.Sequence
txInCopy.ValueIn = txIn.ValueIn
txInCopy.BlockHeight = txIn.BlockHeight
txInCopy.BlockIndex = txIn.BlockIndex
txInCopy.SignatureScript = sigScrCopy
newMsgTx.AddTxIn(txIn)
}
// Shallow copy the TxOuts.
for _, txOut := range msgTx.TxOut {
newMsgTx.AddTxOut(txOut)
}
return &Tx{
hash: msgTx.TxSha(),
msgTx: msgTx,
txTree: TxTreeUnknown,
txIndex: TxIndexUnknown,
}
}
0x09, 0xa6, 0x79, 0x62, 0xe0, 0xea, 0x1f, 0x61, /* |..yb...a| */
0xde, 0xb6, 0x49, 0xf6, 0xbc, 0x3f, 0x4c, 0xef, /* |..I..?L.| */
0x38, 0xc4, 0xf3, 0x55, 0x04, 0xe5, 0x1e, 0xc1, /* |8..U....| */
0x12, 0xde, 0x5c, 0x38, 0x4d, 0xf7, 0xba, 0x0b, /* |..\8M...| */
0x8d, 0x57, 0x8a, 0x4c, 0x70, 0x2b, 0x6b, 0xf1, /* |.W.Lp+k.| */
0x1d, 0x5f, 0xac, /* |._.| */
},
},
},
LockTime: 0,
Expiry: 0,
}
// testNetGenesisMerkleRoot is the hash of the first transaction in the genesis block
// for the test network.
var testNetGenesisMerkleRoot = genesisCoinbaseTxLegacy.TxSha()
// testNetGenesisBlock defines the genesis block of the block chain which
// serves as the public transaction ledger for the test network (version 3).
var testNetGenesisBlock = wire.MsgBlock{
Header: wire.BlockHeader{
Version: 1,
PrevBlock: chainhash.Hash{},
MerkleRoot: testNetGenesisMerkleRoot,
Timestamp: time.Unix(1453908222, 0), // 2016-01-27 TestNet9
Bits: 0x1e00ffff,
SBits: 20000000,
Nonce: 0x18aea41a,
},
Transactions: []*wire.MsgTx{&genesisCoinbaseTxLegacy},
}
func TestStakeInvalidationTxInsert(t *testing.T) {
db, s, teardown, err := setup()
defer teardown()
if err != nil {
t.Fatal(err)
}
g := makeBlockGenerator()
block1Header := g.generate(dcrutil.BlockValid)
block2Header := g.generate(dcrutil.BlockValid)
block3Header := g.generate(0)
block1Tx := wire.MsgTx{
TxOut: []*wire.TxOut{{Value: 2e8}},
}
block2Tx := wire.MsgTx{
TxIn: []*wire.TxIn{
{PreviousOutPoint: wire.OutPoint{Hash: block1Tx.TxSha(), Index: 0, Tree: 0}},
},
TxOut: []*wire.TxOut{{Value: 1e8}},
}
block1TxRec, err := NewTxRecordFromMsgTx(&block1Tx, time.Time{})
if err != nil {
t.Fatal(err)
}
block2TxRec, err := NewTxRecordFromMsgTx(&block2Tx, time.Time{})
if err != nil {
t.Fatal(err)
}
err = walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns := tx.ReadWriteBucket(wtxmgrNamespaceKey)
addrmgrNs := tx.ReadBucket(waddrmgrNamespaceKey)
headerData := makeHeaderDataSlice(block1Header, block2Header, block3Header)
err = s.InsertMainChainHeaders(ns, addrmgrNs, headerData)
if err != nil {
return err
}
err = s.InsertMinedTx(ns, addrmgrNs, block1TxRec, &headerData[0].BlockHash)
if err != nil {
return err
}
err = s.AddCredit(ns, block1TxRec, makeBlockMeta(block1Header), 0, false, 0)
if err != nil {
return err
}
err = s.InsertMinedTx(ns, addrmgrNs, block2TxRec, &headerData[1].BlockHash)
if err != nil {
return err
}
err = s.AddCredit(ns, block2TxRec, makeBlockMeta(block2Header), 0, false, 0)
if err != nil {
return err
}
// The transaction in block 2 was inserted invalidated. There should
// only be one unspent output, from block 1.
bal, err := s.Balance(ns, addrmgrNs, 1, BFBalanceFullScan, true, 0)
if err != nil {
return err
}
if bal != dcrutil.Amount(block1Tx.TxOut[0].Value) {
t.Errorf("Wrong balance: expected %v got %v", dcrutil.Amount(block1Tx.TxOut[0].Value), bal)
}
bal, err = s.Balance(ns, addrmgrNs, 1, BFBalanceSpendable, true, 0)
if err != nil {
return err
}
if bal != dcrutil.Amount(block1Tx.TxOut[0].Value) {
t.Errorf("Wrong balance: expected %v got %v", dcrutil.Amount(block1Tx.TxOut[0].Value), bal)
}
credits, err := s.UnspentOutputs(ns)
if err != nil {
return err
}
if len(credits) != 1 {
t.Errorf("Expected only 1 credit, got %v", len(credits))
return nil
}
if credits[0].Hash != block1Tx.TxSha() {
t.Errorf("Credit hash does not match tx from block 1")
return nil
}
if credits[0].Amount != dcrutil.Amount(block1Tx.TxOut[0].Value) {
t.Errorf("Credit value does not match tx output 0 from block 1")
return nil
}
return nil
})
if err != nil {
t.Error(err)
}
}
func TestStakeInvalidationOfTip(t *testing.T) {
db, s, teardown, err := setup()
defer teardown()
if err != nil {
t.Fatal(err)
}
g := makeBlockGenerator()
block1Header := g.generate(dcrutil.BlockValid)
block2Header := g.generate(dcrutil.BlockValid)
block3Header := g.generate(0)
block1Tx := wire.MsgTx{
TxOut: []*wire.TxOut{{Value: 2e8}},
}
block2Tx := wire.MsgTx{
TxIn: []*wire.TxIn{
{PreviousOutPoint: wire.OutPoint{Hash: block1Tx.TxSha(), Index: 0, Tree: 0}},
},
TxOut: []*wire.TxOut{{Value: 1e8}},
}
block1TxRec, err := NewTxRecordFromMsgTx(&block1Tx, time.Time{})
if err != nil {
t.Fatal(err)
}
block2TxRec, err := NewTxRecordFromMsgTx(&block2Tx, time.Time{})
if err != nil {
t.Fatal(err)
}
const balanceFlag = BFBalanceSpendable
err = walletdb.Update(db, func(tx walletdb.ReadWriteTx) error {
ns := tx.ReadWriteBucket(wtxmgrNamespaceKey)
addrmgrNs := tx.ReadBucket(waddrmgrNamespaceKey)
err := s.InsertMemPoolTx(ns, block1TxRec)
if err != nil {
return err
}
err = s.AddCredit(ns, block1TxRec, nil, 0, false, 0)
if err != nil {
return err
}
err = s.InsertMemPoolTx(ns, block2TxRec)
if err != nil {
return err
}
err = s.AddCredit(ns, block2TxRec, nil, 0, false, 0)
if err != nil {
return err
}
bal, err := s.Balance(ns, addrmgrNs, 0, balanceFlag, false, 0)
if err != nil {
return err
}
if bal != 1e8 {
t.Errorf("Wrong balance before mining either transaction: %v", bal)
}
headerData := makeHeaderDataSlice(block1Header, block2Header)
err = s.InsertMainChainHeaders(ns, addrmgrNs, headerData)
if err != nil {
return err
}
err = s.InsertMinedTx(ns, addrmgrNs, block1TxRec, &headerData[0].BlockHash)
if err != nil {
return err
}
err = s.InsertMinedTx(ns, addrmgrNs, block2TxRec, &headerData[1].BlockHash)
if err != nil {
return err
}
// At this point there should only be one credit for the tx in block 2.
bal, err = s.Balance(ns, addrmgrNs, 1, balanceFlag, false, 0)
if err != nil {
return err
}
if bal != dcrutil.Amount(block2Tx.TxOut[0].Value) {
t.Errorf("Wrong balance: expected %v got %v", dcrutil.Amount(block2Tx.TxOut[0].Value), bal)
}
credits, err := s.UnspentOutputs(ns)
if err != nil {
return err
}
if len(credits) != 1 {
t.Errorf("Expected only 1 credit, got %v", len(credits))
return nil
}
if credits[0].Hash != block2Tx.TxSha() {
t.Errorf("Credit hash does match tx from block 2")
return nil
}
if credits[0].Amount != dcrutil.Amount(block2Tx.TxOut[0].Value) {
t.Errorf("Credit value does not match tx output 0 from block 2")
return nil
}
// Add the next block header which invalidates the regular tx tree of
// block 2.
t.Log("Invalidating block 2")
headerData = makeHeaderDataSlice(block3Header)
err = s.InsertMainChainHeaders(ns, addrmgrNs, headerData)
if err != nil {
return err
}
/*
d := makeHeaderData(block3Header)
err = s.ExtendMainChain(ns, &d)
if err != nil {
return err
}
*/
// Now the transaction in block 2 is invalidated. There should only be
// one unspent output, from block 1.
bal, err = s.Balance(ns, addrmgrNs, 1, balanceFlag, false, 0)
if err != nil {
return err
}
if bal != dcrutil.Amount(block1Tx.TxOut[0].Value) {
t.Errorf("Wrong balance: expected %v got %v", dcrutil.Amount(block1Tx.TxOut[0].Value), bal)
}
credits, err = s.UnspentOutputs(ns)
if err != nil {
return err
}
if len(credits) != 1 {
t.Errorf("Expected only 1 credit, got %v", len(credits))
return nil
}
if credits[0].Hash != block1Tx.TxSha() {
t.Errorf("Credit hash does not match tx from block 1")
return nil
}
if credits[0].Amount != dcrutil.Amount(block1Tx.TxOut[0].Value) {
t.Errorf("Credit value does not match tx output 0 from block 1")
return nil
}
return nil
})
if err != nil {
t.Error(err)
}
}
// DebugMsgTxString dumps a verbose message containing information about the
// contents of a transaction.
func DebugMsgTxString(msgTx *wire.MsgTx) string {
tx := dcrutil.NewTx(msgTx)
isSStx, _ := stake.IsSStx(tx)
isSSGen, _ := stake.IsSSGen(tx)
var sstxType []bool
var sstxPkhs [][]byte
var sstxAmts []int64
var sstxRules [][]bool
var sstxLimits [][]uint16
if isSStx {
sstxType, sstxPkhs, sstxAmts, _, sstxRules, sstxLimits =
stake.GetSStxStakeOutputInfo(tx)
}
var buffer bytes.Buffer
hash := msgTx.TxSha()
str := fmt.Sprintf("Transaction hash: %v, Version %v, Locktime: %v, "+
"Expiry %v\n\n", hash, msgTx.Version, msgTx.LockTime, msgTx.Expiry)
buffer.WriteString(str)
str = fmt.Sprintf("==INPUTS==\nNumber of inputs: %v\n\n",
len(msgTx.TxIn))
buffer.WriteString(str)
for i, input := range msgTx.TxIn {
str = fmt.Sprintf("Input number: %v\n", i)
buffer.WriteString(str)
str = fmt.Sprintf("Previous outpoint hash: %v, ",
input.PreviousOutPoint.Hash)
buffer.WriteString(str)
str = fmt.Sprintf("Previous outpoint index: %v, ",
input.PreviousOutPoint.Index)
buffer.WriteString(str)
str = fmt.Sprintf("Previous outpoint tree: %v \n",
input.PreviousOutPoint.Tree)
buffer.WriteString(str)
str = fmt.Sprintf("Sequence: %v \n",
input.Sequence)
buffer.WriteString(str)
str = fmt.Sprintf("ValueIn: %v \n",
input.ValueIn)
buffer.WriteString(str)
str = fmt.Sprintf("BlockHeight: %v \n",
input.BlockHeight)
buffer.WriteString(str)
str = fmt.Sprintf("BlockIndex: %v \n",
input.BlockIndex)
buffer.WriteString(str)
str = fmt.Sprintf("Raw signature script: %x \n", input.SignatureScript)
buffer.WriteString(str)
sigScr, _ := txscript.DisasmString(input.SignatureScript)
str = fmt.Sprintf("Disasmed signature script: %v \n\n",
sigScr)
buffer.WriteString(str)
}
str = fmt.Sprintf("==OUTPUTS==\nNumber of outputs: %v\n\n",
len(msgTx.TxOut))
buffer.WriteString(str)
for i, output := range msgTx.TxOut {
str = fmt.Sprintf("Output number: %v\n", i)
buffer.WriteString(str)
coins := float64(output.Value) / 1e8
str = fmt.Sprintf("Output amount: %v atoms or %v coins\n", output.Value,
coins)
buffer.WriteString(str)
// SStx OP_RETURNs, dump pkhs and amts committed
if isSStx && i != 0 && i%2 == 1 {
coins := float64(sstxAmts[i/2]) / 1e8
str = fmt.Sprintf("SStx commit amount: %v atoms or %v coins\n",
sstxAmts[i/2], coins)
buffer.WriteString(str)
str = fmt.Sprintf("SStx commit address: %x\n",
sstxPkhs[i/2])
buffer.WriteString(str)
str = fmt.Sprintf("SStx address type is P2SH: %v\n",
sstxType[i/2])
buffer.WriteString(str)
str = fmt.Sprintf("SStx all address types is P2SH: %v\n",
sstxType)
buffer.WriteString(str)
str = fmt.Sprintf("Voting is fee limited: %v\n",
sstxLimits[i/2][0])
buffer.WriteString(str)
if sstxRules[i/2][0] {
str = fmt.Sprintf("Voting limit imposed: %v\n",
sstxLimits[i/2][0])
buffer.WriteString(str)
}
str = fmt.Sprintf("Revoking is fee limited: %v\n",
sstxRules[i/2][1])
buffer.WriteString(str)
if sstxRules[i/2][1] {
str = fmt.Sprintf("Voting limit imposed: %v\n",
sstxLimits[i/2][1])
buffer.WriteString(str)
}
}
// SSGen block/block height OP_RETURN.
if isSSGen && i == 0 {
blkHash, blkHeight, _ := stake.GetSSGenBlockVotedOn(tx)
str = fmt.Sprintf("SSGen block hash voted on: %v, height: %v\n",
blkHash, blkHeight)
buffer.WriteString(str)
}
if isSSGen && i == 1 {
vb := stake.GetSSGenVoteBits(tx)
str = fmt.Sprintf("SSGen vote bits: %v\n", vb)
buffer.WriteString(str)
}
str = fmt.Sprintf("Raw script: %x \n", output.PkScript)
buffer.WriteString(str)
scr, _ := txscript.DisasmString(output.PkScript)
str = fmt.Sprintf("Disasmed script: %v \n\n", scr)
buffer.WriteString(str)
}
return buffer.String()
}
0x09, 0xa6, 0x79, 0x62, 0xe0, 0xea, 0x1f, 0x61, /* |..yb...a| */
0xde, 0xb6, 0x49, 0xf6, 0xbc, 0x3f, 0x4c, 0xef, /* |..I..?L.| */
0x38, 0xc4, 0xf3, 0x55, 0x04, 0xe5, 0x1e, 0xc1, /* |8..U....| */
0x12, 0xde, 0x5c, 0x38, 0x4d, 0xf7, 0xba, 0x0b, /* |..\8M...| */
0x8d, 0x57, 0x8a, 0x4c, 0x70, 0x2b, 0x6b, 0xf1, /* |.W.Lp+k.| */
0x1d, 0x5f, 0xac, /* |._.| */
},
},
},
LockTime: 0,
Expiry: 0,
}
// genesisMerkleRoot is the hash of the first transaction in the genesis block
// for the main network.
var genesisMerkleRoot = genesisCoinbaseTxLegacy.TxSha()
var regTestGenesisCoinbaseTx = wire.MsgTx{
Version: 1,
TxIn: []*wire.TxIn{
{
PreviousOutPoint: wire.OutPoint{
Hash: chainhash.Hash{},
Index: 0xffffffff,
},
SignatureScript: []byte{
0x04, 0xff, 0xff, 0x00, 0x1d, 0x01, 0x04, 0x45, /* |.......E| */
0x54, 0x68, 0x65, 0x20, 0x54, 0x69, 0x6d, 0x65, /* |The Time| */
0x73, 0x20, 0x30, 0x33, 0x2f, 0x4a, 0x61, 0x6e, /* |s 03/Jan| */
0x2f, 0x32, 0x30, 0x30, 0x39, 0x20, 0x43, 0x68, /* |/2009 Ch| */
0x61, 0x6e, 0x63, 0x65, 0x6c, 0x6c, 0x6f, 0x72, /* |ancellor| */
// loadTxStore returns a transaction store loaded from a file.
func loadTxStore(filename string) (blockchain.TxStore, error) {
// The txstore file format is:
// <num tx data entries> <tx length> <serialized tx> <blk height>
// <num spent bits> <spent bits>
//
// All num and length fields are little-endian uint32s. The spent bits
// field is padded to a byte boundary.
filename = filepath.Join("testdata/", filename)
fi, err := os.Open(filename)
if err != nil {
return nil, err
}
// Choose read based on whether the file is compressed or not.
var r io.Reader
if strings.HasSuffix(filename, ".bz2") {
r = bzip2.NewReader(fi)
} else {
r = fi
}
defer fi.Close()
// Num of transaction store objects.
var numItems uint32
if err := binary.Read(r, binary.LittleEndian, &numItems); err != nil {
return nil, err
}
txStore := make(blockchain.TxStore)
var uintBuf uint32
for height := uint32(0); height < numItems; height++ {
txD := blockchain.TxData{}
// Serialized transaction length.
err = binary.Read(r, binary.LittleEndian, &uintBuf)
if err != nil {
return nil, err
}
serializedTxLen := uintBuf
if serializedTxLen > wire.MaxBlockPayload {
return nil, fmt.Errorf("Read serialized transaction "+
"length of %d is larger max allowed %d",
serializedTxLen, wire.MaxBlockPayload)
}
// Transaction.
var msgTx wire.MsgTx
err = msgTx.Deserialize(r)
if err != nil {
return nil, err
}
txD.Tx = dcrutil.NewTx(&msgTx)
// Transaction hash.
txHash := msgTx.TxSha()
txD.Hash = &txHash
// Block height the transaction came from.
err = binary.Read(r, binary.LittleEndian, &uintBuf)
if err != nil {
return nil, err
}
txD.BlockHeight = int64(uintBuf)
// Num spent bits.
err = binary.Read(r, binary.LittleEndian, &uintBuf)
if err != nil {
return nil, err
}
numSpentBits := uintBuf
numSpentBytes := numSpentBits / 8
if numSpentBits%8 != 0 {
numSpentBytes++
}
// Packed spent bytes.
spentBytes := make([]byte, numSpentBytes)
_, err = io.ReadFull(r, spentBytes)
if err != nil {
return nil, err
}
// Populate spent data based on spent bits.
txD.Spent = make([]bool, numSpentBits)
for byteNum, spentByte := range spentBytes {
for bit := 0; bit < 8; bit++ {
if uint32((byteNum*8)+bit) < numSpentBits {
if spentByte&(1<<uint(bit)) != 0 {
txD.Spent[(byteNum*8)+bit] = true
}
}
}
}
txStore[*txD.Hash] = &txD
}
return txStore, nil
}
// TestCalcSignatureHash does some rudimentary testing of msg hash calculation.
func TestCalcSignatureHash(t *testing.T) {
tx := new(wire.MsgTx)
for i := 0; i < 3; i++ {
txIn := new(wire.TxIn)
txIn.Sequence = 0xFFFFFFFF
txIn.PreviousOutPoint.Hash = chainhash.HashFuncH([]byte{byte(i)})
txIn.PreviousOutPoint.Index = uint32(i)
txIn.PreviousOutPoint.Tree = int8(0)
tx.AddTxIn(txIn)
}
for i := 0; i < 2; i++ {
txOut := new(wire.TxOut)
txOut.PkScript = []byte{0x01, 0x01, 0x02, 0x03}
txOut.Value = 0x0000FF00FF00FF00
tx.AddTxOut(txOut)
}
want, _ := hex.DecodeString("d09285b6f60c71329323bc2e76c48" +
"a462cde4e1032aa8f59c55823f1722c7f4a")
pops, _ := txscript.TstParseScript([]byte{0x01, 0x01, 0x02, 0x03})
// Test prefix caching.
msg1, err := txscript.CalcSignatureHash(pops, txscript.SigHashAll, tx, 0, nil)
if err != nil {
t.Fatalf("unexpected error %v", err.Error())
}
prefixHash := tx.TxSha()
msg2, err := txscript.CalcSignatureHash(pops, txscript.SigHashAll, tx, 0,
&prefixHash)
if err != nil {
t.Fatalf("unexpected error %v", err.Error())
}
if !bytes.Equal(msg1, want) {
t.Errorf("for sighash all sig noncached wrong msg %x given, want %x",
msg1,
want)
}
if !bytes.Equal(msg2, want) {
t.Errorf("for sighash all sig cached wrong msg %x given, want %x",
msg1,
want)
}
if !bytes.Equal(msg1, msg2) {
t.Errorf("for sighash all sig non-equivalent msgs %x and %x were "+
"returned when using a cached prefix",
msg1,
msg2)
}
// Move the index and make sure that we get a whole new hash, despite
// using the same TxOuts.
msg3, err := txscript.CalcSignatureHash(pops, txscript.SigHashAll, tx, 1,
&prefixHash)
if err != nil {
t.Fatalf("unexpected error %v", err.Error())
}
if bytes.Equal(msg1, msg3) {
t.Errorf("for sighash all sig equivalent msgs %x and %x were "+
"returned when using a cached prefix but different indices",
msg1,
msg3)
}
}