// SearchRawTransactionsAsync returns an instance of a type that can be used to
// get the result of the RPC at some future time by invoking the Receive
// function on the returned instance.
//
// See SearchRawTransactions for the blocking version and more details.
func (c *Client) SearchRawTransactionsAsync(address btcutil.Address, skip, count int, reverse bool, filterAddrs []string) FutureSearchRawTransactionsResult {
addr := address.EncodeAddress()
verbose := btcjson.Int(0)
cmd := btcjson.NewSearchRawTransactionsCmd(addr, verbose, &skip, &count,
nil, &reverse, &filterAddrs)
return c.sendCmd(cmd)
}
func (l *LibbitcoinClient) FetchHistory2(address btc.Address, fromHeight uint32, callback func(interface{}, error)) {
hash160 := address.ScriptAddress()
var netID byte
height := make([]byte, 4)
binary.LittleEndian.PutUint32(height, fromHeight)
address.ScriptAddress()
switch reflect.TypeOf(address).String() {
case "*btcutil.AddressPubKeyHash":
if l.Params.Name == chaincfg.MainNetParams.Name {
netID = byte(0)
} else {
netID = byte(111)
}
case "*btcutil.AddressScriptHash":
if l.Params.Name == chaincfg.MainNetParams.Name {
netID = byte(5)
} else {
netID = byte(196)
}
}
req := []byte{}
req = append(req, netID)
req = append(req, hash160...)
req = append(req, height...)
go l.SendCommand("address.fetch_history2", req, callback)
}
func (l *LibbitcoinClient) UnsubscribeAddress(address btc.Address) {
l.lock.Lock()
_, ok := l.subscriptions[address.String()]
if ok {
delete(l.subscriptions, address.String())
}
l.lock.Unlock()
}
// SearchRawTransactionsVerboseAsync returns an instance of a type that can be
// used to get the result of the RPC at some future time by invoking the Receive
// function on the returned instance.
//
// See SearchRawTransactionsVerbose for the blocking version and more details.
func (c *Client) SearchRawTransactionsVerboseAsync(address btcutil.Address, skip,
count int, includePrevOut, reverse bool, filterAddrs *[]string) FutureSearchRawTransactionsVerboseResult {
addr := address.EncodeAddress()
verbose := btcjson.Int(1)
var prevOut *int
if includePrevOut {
prevOut = btcjson.Int(1)
}
cmd := btcjson.NewSearchRawTransactionsCmd(addr, verbose, &skip, &count,
prevOut, &reverse, filterAddrs)
return c.sendCmd(cmd)
}
func (l *LibbitcoinClient) RenewSubscription(address btc.Address, callback func(interface{})) {
req := []byte{}
req = append(req, byte(0))
req = append(req, byte(160))
req = append(req, address.ScriptAddress()...)
go l.SendCommand("address.renew", req, nil)
l.lock.Lock()
l.subscriptions[address.String()] = subscription{
expiration: time.Now().Add(24 * time.Hour),
callback: callback,
}
l.lock.Unlock()
}
// FilterTransactionsByAddress returns all transactions currently in the
// mempool that either create an output to the passed address or spend a
// previously created ouput to the address.
func (mp *txMemPool) FilterTransactionsByAddress(addr btcutil.Address) ([]*btcutil.Tx, error) {
// Protect concurrent access.
mp.RLock()
defer mp.RUnlock()
if txs, exists := mp.addrindex[addr.EncodeAddress()]; exists {
addressTxs := make([]*btcutil.Tx, 0, len(txs))
for txHash := range txs {
if txD, exists := mp.pool[txHash]; exists {
addressTxs = append(addressTxs, txD.Tx)
}
}
return addressTxs, nil
}
return nil, fmt.Errorf("address does not have any transactions in the pool")
}
func (s *walletServer) NextAddress(ctx context.Context, req *pb.NextAddressRequest) (
*pb.NextAddressResponse, error) {
var (
addr btcutil.Address
err error
)
switch req.Kind {
case pb.NextAddressRequest_BIP0044_EXTERNAL:
addr, err = s.wallet.NewAddress(req.Account)
case pb.NextAddressRequest_BIP0044_INTERNAL:
addr, err = s.wallet.NewChangeAddress(req.Account)
default:
return nil, grpc.Errorf(codes.InvalidArgument, "kind=%v", req.Kind)
}
if err != nil {
return nil, translateError(err)
}
return &pb.NextAddressResponse{Address: addr.EncodeAddress()}, nil
}
// TotalReceivedForAddr iterates through a wallet's transaction history,
// returning the total amount of bitcoins received for a single wallet
// address.
func (w *Wallet) TotalReceivedForAddr(addr btcutil.Address, minConf int32) (btcutil.Amount, error) {
syncBlock := w.Manager.SyncedTo()
var (
addrStr = addr.EncodeAddress()
amount btcutil.Amount
stopHeight int32
)
if minConf > 0 {
stopHeight = syncBlock.Height - minConf + 1
} else {
stopHeight = -1
}
err := w.TxStore.RangeTransactions(0, stopHeight, func(details []wtxmgr.TxDetails) (bool, error) {
for i := range details {
detail := &details[i]
for _, cred := range detail.Credits {
pkScript := detail.MsgTx.TxOut[cred.Index].PkScript
_, addrs, _, err := txscript.ExtractPkScriptAddrs(
pkScript, w.chainParams)
// An error creating addresses from the output script only
// indicates a non-standard script, so ignore this credit.
if err != nil {
continue
}
for _, a := range addrs {
if addrStr == a.EncodeAddress() {
amount += cred.Amount
break
}
}
}
}
return false, nil
})
return amount, err
}
// PayToAddrScript creates a new script to pay a transaction output to a the
// specified address.
func PayToAddrScript(addr btcutil.Address) ([]byte, error) {
switch addr := addr.(type) {
case *btcutil.AddressPubKeyHash:
if addr == nil {
return nil, ErrUnsupportedAddress
}
return payToPubKeyHashScript(addr.ScriptAddress())
case *btcutil.AddressScriptHash:
if addr == nil {
return nil, ErrUnsupportedAddress
}
return payToScriptHashScript(addr.ScriptAddress())
case *btcutil.AddressPubKey:
if addr == nil {
return nil, ErrUnsupportedAddress
}
return payToPubKeyScript(addr.ScriptAddress())
}
return nil, ErrUnsupportedAddress
}
// addrToKey converts known address types to an addrindex key. An error is
// returned for unsupported types.
func addrToKey(addr btcutil.Address) ([addrKeySize]byte, error) {
switch addr := addr.(type) {
case *btcutil.AddressPubKeyHash:
var result [addrKeySize]byte
result[0] = addrKeyTypePubKeyHash
copy(result[1:], addr.Hash160()[:])
return result, nil
case *btcutil.AddressScriptHash:
var result [addrKeySize]byte
result[0] = addrKeyTypeScriptHash
copy(result[1:], addr.Hash160()[:])
return result, nil
case *btcutil.AddressPubKey:
var result [addrKeySize]byte
result[0] = addrKeyTypePubKeyHash
copy(result[1:], addr.AddressPubKeyHash().Hash160()[:])
return result, nil
}
return [addrKeySize]byte{}, errUnsupportedAddressType
}
// FetchTxsForAddr looks up and returns all transactions which either
// spend from a previously created output of the passed address, or
// create a new output locked to the passed address. The, `limit` parameter
// should be the max number of transactions to be returned. Additionally, if the
// caller wishes to seek forward in the results some amount, the 'seek'
// represents how many results to skip.
func (db *LevelDb) FetchTxsForAddr(addr btcutil.Address, skip int,
limit int, reverse bool) ([]*database.TxListReply, int, error) {
db.dbLock.Lock()
defer db.dbLock.Unlock()
// Enforce constraints for skip and limit.
if skip < 0 {
return nil, 0, errors.New("offset for skip must be positive")
}
if limit < 0 {
return nil, 0, errors.New("value for limit must be positive")
}
// Parse address type, bailing on an unknown type.
var addrKey []byte
switch addr := addr.(type) {
case *btcutil.AddressPubKeyHash:
hash160 := addr.Hash160()
addrKey = hash160[:]
case *btcutil.AddressScriptHash:
hash160 := addr.Hash160()
addrKey = hash160[:]
case *btcutil.AddressPubKey:
hash160 := addr.AddressPubKeyHash().Hash160()
addrKey = hash160[:]
default:
return nil, 0, database.ErrUnsupportedAddressType
}
// Create the prefix for our search.
addrPrefix := make([]byte, 23, 23)
copy(addrPrefix[0:3], addrIndexKeyPrefix)
copy(addrPrefix[3:23], addrKey)
iter := db.lDb.NewIterator(bytesPrefix(addrPrefix), nil)
skipped := 0
if reverse {
// Go to the last element if reverse iterating.
iter.Last()
// Skip "one past" the last element so the loops below don't
// miss the last element due to Prev() being called first.
// We can safely ignore iterator exhaustion since the loops
// below will see there's no keys anyway.
iter.Next()
}
for skip != 0 && advanceIterator(iter, reverse) {
skip--
skipped++
}
// Iterate through all address indexes that match the targeted prefix.
var replies []*database.TxListReply
var rawIndex [12]byte
for advanceIterator(iter, reverse) && limit != 0 {
copy(rawIndex[:], iter.Key()[23:35])
addrIndex := unpackTxIndex(rawIndex)
tx, blkSha, blkHeight, _, err := db.fetchTxDataByLoc(addrIndex.blkHeight,
addrIndex.txoffset, addrIndex.txlen, []byte{})
if err != nil {
// Eat a possible error due to a potential re-org.
continue
}
txSha := tx.TxSha()
txReply := &database.TxListReply{Sha: &txSha, Tx: tx,
BlkSha: blkSha, Height: blkHeight, TxSpent: []bool{}, Err: err}
replies = append(replies, txReply)
limit--
}
iter.Release()
if err := iter.Error(); err != nil {
return nil, 0, err
}
return replies, skipped, nil
}
// SearchRawTransactionsVerboseAsync returns an instance of a type that can be
// used to get the result of the RPC at some future time by invoking the Receive
// function on the returned instance.
//
// See SearchRawTransactionsVerbose for the blocking version and more details.
func (c *Client) SearchRawTransactionsVerboseAsync(address btcutil.Address, skip, count int) FutureSearchRawTransactionsVerboseResult {
addr := address.EncodeAddress()
verbose := btcjson.Int(1)
cmd := btcjson.NewSearchRawTransactionsCmd(addr, verbose, &skip, &count)
return c.sendCmd(cmd)
}
func (l *LibbitcoinClient) Parse(command string, data []byte, callback func(interface{}, error)) {
switch command {
case "address.fetch_history2":
numRows := (len(data) - 4) / 49
buff := bytes.NewBuffer(data)
err := ParseError(buff.Next(4))
rows := []FetchHistory2Resp{}
for i := 0; i < numRows; i++ {
r := FetchHistory2Resp{}
spendByte := int(buff.Next(1)[0])
var spendBool bool
if spendByte == 0 {
spendBool = false
} else {
spendBool = true
}
r.IsSpend = spendBool
lehash := buff.Next(32)
sh, _ := wire.NewShaHash(lehash)
r.TxHash = sh.String()
indexBytes := buff.Next(4)
r.Index = binary.LittleEndian.Uint32(indexBytes)
heightBytes := buff.Next(4)
r.Height = binary.LittleEndian.Uint32(heightBytes)
valueBytes := buff.Next(8)
r.Value = binary.LittleEndian.Uint64(valueBytes)
rows = append(rows, r)
}
callback(rows, err)
case "blockchain.fetch_last_height":
height := binary.LittleEndian.Uint32(data[4:])
callback(height, ParseError(data[:4]))
case "blockchain.fetch_transaction":
txn, _ := btc.NewTxFromBytes(data[4:])
callback(txn, ParseError(data[:4]))
case "transaction_pool.fetch_transaction":
txn, _ := btc.NewTxFromBytes(data[4:])
callback(txn, ParseError(data[:4]))
case "address.update":
buff := bytes.NewBuffer(data)
addressVersion := buff.Next(1)[0]
addressHash160 := buff.Next(20)
height := buff.Next(4)
block := buff.Next(32)
tx := buff.Bytes()
var addr btc.Address
if addressVersion == byte(111) || addressVersion == byte(0) {
a, _ := btc.NewAddressPubKeyHash(addressHash160, l.Params)
addr = a
} else if addressVersion == byte(5) || addressVersion == byte(196) {
a, _ := btc.NewAddressScriptHashFromHash(addressHash160, l.Params)
addr = a
}
bl, _ := wire.NewShaHash(block)
txn, _ := btc.NewTxFromBytes(tx)
resp := SubscribeResp{
Address: addr.String(),
Height: binary.LittleEndian.Uint32(height),
Block: bl.String(),
Tx: *txn,
}
l.lock.Lock()
l.subscriptions[addr.String()].callback(resp)
l.lock.Unlock()
case "protocol.broadcast_transaction":
callback(nil, ParseError(data[:4]))
case "transaction_pool.validate":
b := data[4:5]
success, _ := strconv.ParseBool(string(b))
callback(success, ParseError(data[:4]))
}
}
// FetchTxsForAddr looks up and returns all transactions which either
// spend from a previously created output of the passed address, or
// create a new output locked to the passed address. The, `limit` parameter
// should be the max number of transactions to be returned. Additionally, if the
// caller wishes to seek forward in the results some amount, the 'seek'
// represents how many results to skip.
func (db *LevelDb) FetchTxsForAddr(addr btcutil.Address, skip int,
limit int) ([]*database.TxListReply, error) {
db.dbLock.Lock()
defer db.dbLock.Unlock()
// Enforce constraints for skip and limit.
if skip < 0 {
return nil, errors.New("offset for skip must be positive")
}
if limit < 0 {
return nil, errors.New("value for limit must be positive")
}
// Parse address type, bailing on an unknown type.
var addrKey []byte
switch addr := addr.(type) {
case *btcutil.AddressPubKeyHash:
hash160 := addr.Hash160()
addrKey = hash160[:]
case *btcutil.AddressScriptHash:
hash160 := addr.Hash160()
addrKey = hash160[:]
case *btcutil.AddressPubKey:
hash160 := addr.AddressPubKeyHash().Hash160()
addrKey = hash160[:]
default:
return nil, database.ErrUnsupportedAddressType
}
// Create the prefix for our search.
addrPrefix := make([]byte, 23, 23)
copy(addrPrefix[0:3], addrIndexKeyPrefix)
copy(addrPrefix[3:23], addrKey)
iter := db.lDb.NewIterator(bytesPrefix(addrPrefix), nil)
for skip != 0 && iter.Next() {
skip--
}
// Iterate through all address indexes that match the targeted prefix.
var replies []*database.TxListReply
var rawIndex [12]byte
for iter.Next() && limit != 0 {
copy(rawIndex[:], iter.Key()[23:35])
addrIndex := unpackTxIndex(rawIndex)
tx, blkSha, blkHeight, _, err := db.fetchTxDataByLoc(addrIndex.blkHeight,
addrIndex.txoffset, addrIndex.txlen, []byte{})
if err != nil {
// Eat a possible error due to a potential re-org.
continue
}
txSha := tx.TxSha()
txReply := &database.TxListReply{Sha: &txSha, Tx: tx,
BlkSha: blkSha, Height: blkHeight, TxSpent: []bool{}, Err: err}
replies = append(replies, txReply)
limit--
}
iter.Release()
if err := iter.Error(); err != nil {
return nil, err
}
return replies, nil
}
func (w *LibbitcoinWallet) Spend(amount int64, addr btc.Address, feeLevel bitcoin.FeeLevel) error {
// Check for dust
script, _ := txscript.PayToAddrScript(addr)
if txrules.IsDustAmount(btc.Amount(amount), len(script), txrules.DefaultRelayFeePerKb) {
return errors.New("Amount is below dust threshold")
}
var additionalPrevScripts map[wire.OutPoint][]byte
var additionalKeysByAddress map[string]*btc.WIF
// Create input source
coinMap := w.gatherCoins()
coins := make([]coinset.Coin, 0, len(coinMap))
for k := range coinMap {
coins = append(coins, k)
}
inputSource := func(target btc.Amount) (total btc.Amount, inputs []*wire.TxIn, scripts [][]byte, err error) {
// TODO: maybe change the coin selection algorithm? We're using min coins right now because
// TODO: we don't know the number of confirmations on each coin without querying the libbitcoin server.
coinSelector := coinset.MinNumberCoinSelector{MaxInputs: 10000, MinChangeAmount: btc.Amount(10000)}
coins, err := coinSelector.CoinSelect(target, coins)
if err != nil {
return total, inputs, scripts, errors.New("insuffient funds")
}
additionalPrevScripts = make(map[wire.OutPoint][]byte)
additionalKeysByAddress = make(map[string]*btc.WIF)
for _, c := range coins.Coins() {
total += c.Value()
outpoint := wire.NewOutPoint(c.Hash(), c.Index())
in := wire.NewTxIn(outpoint, []byte{})
in.Sequence = 0 // Opt-in RBF so we can bump fees
inputs = append(inputs, in)
additionalPrevScripts[*outpoint] = c.PkScript()
key := coinMap[c]
addr, _ := btc.NewAddressPubKey(key.PublicKey().Key, w.params)
pk, _ := btcec.PrivKeyFromBytes(btcec.S256(), key.Key)
wif, _ := btc.NewWIF(pk, w.params, true)
additionalKeysByAddress[addr.AddressPubKeyHash().EncodeAddress()] = wif
}
return total, inputs, scripts, nil
}
// Get the fee per kilobyte
feePerKB := int64(w.getFeePerByte(feeLevel)) * 1000
// outputs
out := wire.NewTxOut(amount, script)
// Create change source
changeSource := func() ([]byte, error) {
addr := w.GetCurrentAddress(bitcoin.CHANGE)
script, err := txscript.PayToAddrScript(addr)
if err != nil {
return []byte{}, err
}
return script, nil
}
authoredTx, err := txauthor.NewUnsignedTransaction([]*wire.TxOut{out}, btc.Amount(feePerKB), inputSource, changeSource)
if err != nil {
return err
}
// BIP 69 sorting
txsort.InPlaceSort(authoredTx.Tx)
// Sign tx
getKey := txscript.KeyClosure(func(addr btc.Address) (
*btcec.PrivateKey, bool, error) {
addrStr := addr.EncodeAddress()
wif := additionalKeysByAddress[addrStr]
return wif.PrivKey, wif.CompressPubKey, nil
})
getScript := txscript.ScriptClosure(func(
addr btc.Address) ([]byte, error) {
return []byte{}, nil
})
for i, txIn := range authoredTx.Tx.TxIn {
prevOutScript := additionalPrevScripts[txIn.PreviousOutPoint]
script, err := txscript.SignTxOutput(w.params,
authoredTx.Tx, i, prevOutScript, txscript.SigHashAll, getKey,
getScript, txIn.SignatureScript)
if err != nil {
return errors.New("Failed to sign transaction")
}
txIn.SignatureScript = script
}
// Broadcast tx to bitcoin network
serializedTx := new(bytes.Buffer)
authoredTx.Tx.Serialize(serializedTx)
w.Client.Broadcast(serializedTx.Bytes(), func(i interface{}, err error) {
if err == nil {
log.Infof("Broadcast tx %s to bitcoin network\n", authoredTx.Tx.TxSha().String())
} else {
log.Errorf("Failed to broadcast tx, reason: %s\n", err)
}
})
// Update the db
w.ProcessTransaction(btc.NewTx(authoredTx.Tx), 0)
return nil
}