Example #1
0
// This example demonstrates creating a script which pays to a bitcoin address.
// It also prints the created script hex and uses the DisasmString function to
// display the disassembled script.
func ExamplePayToAddrScript() {
	// Parse the address to send the coins to into a btcutil.Address
	// which is useful to ensure the accuracy of the address and determine
	// the address type.  It is also required for the upcoming call to
	// PayToAddrScript.
	addressStr := "12gpXQVcCL2qhTNQgyLVdCFG2Qs2px98nV"
	address, err := btcutil.DecodeAddress(addressStr, &chaincfg.MainNetParams)
	if err != nil {
		fmt.Println(err)
		return
	}

	// Create a public key script that pays to the address.
	script, err := txscript.PayToAddrScript(address)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Printf("Script Hex: %x\n", script)

	disasm, err := txscript.DisasmString(script)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println("Script Disassembly:", disasm)

	// Output:
	// Script Hex: 76a914128004ff2fcaf13b2b91eb654b1dc2b674f7ec6188ac
	// Script Disassembly: OP_DUP OP_HASH160 128004ff2fcaf13b2b91eb654b1dc2b674f7ec61 OP_EQUALVERIFY OP_CHECKSIG
}
Example #2
0
func TestSignMultiSigUTXOPkScriptNotP2SH(t *testing.T) {
	tearDown, pool, _ := TstCreatePoolAndTxStore(t)
	defer tearDown()

	mgr := pool.Manager()
	tx := createWithdrawalTx(t, pool, []int64{4e6}, []int64{})
	addr, _ := btcutil.DecodeAddress("1MirQ9bwyQcGVJPwKUgapu5ouK2E2Ey4gX", mgr.ChainParams())
	pubKeyHashPkScript, _ := txscript.PayToAddrScript(addr.(*btcutil.AddressPubKeyHash))
	msgtx := tx.toMsgTx()

	err := signMultiSigUTXO(mgr, msgtx, 0, pubKeyHashPkScript, []RawSig{RawSig{}})

	TstCheckError(t, "", err, ErrTxSigning)
}
Example #3
0
func TstNewOutputRequest(t *testing.T, transaction uint32, address string, amount btcutil.Amount,
	net *chaincfg.Params) OutputRequest {
	addr, err := btcutil.DecodeAddress(address, net)
	if err != nil {
		t.Fatalf("Unable to decode address %s", address)
	}
	pkScript, err := txscript.PayToAddrScript(addr)
	if err != nil {
		t.Fatalf("Unable to generate pkScript for %v", addr)
	}
	return OutputRequest{
		PkScript:    pkScript,
		Address:     addr,
		Amount:      amount,
		Server:      "server",
		Transaction: transaction,
	}
}
Example #4
0
// addrPairsToOutputs converts a map describing a set of outputs to be created,
// the outputs themselves. The passed map pairs up an address, to a desired
// output value amount. Each address is converted to its corresponding pkScript
// to be used within the constructed output(s).
func addrPairsToOutputs(addrPairs map[string]int64) ([]*wire.TxOut, error) {
	outputs := make([]*wire.TxOut, 0, len(addrPairs))
	for addr, amt := range addrPairs {
		addr, err := btcutil.DecodeAddress(addr, activeNetParams.Params)
		if err != nil {
			return nil, err
		}

		pkscript, err := txscript.PayToAddrScript(addr)
		if err != nil {
			return nil, err
		}

		outputs = append(outputs, wire.NewTxOut(amt, pkscript))
	}

	return outputs, nil
}
Example #5
0
func TestSignMultiSigUTXORedeemScriptNotFound(t *testing.T) {
	tearDown, pool, _ := TstCreatePoolAndTxStore(t)
	defer tearDown()

	mgr := pool.Manager()
	tx := createWithdrawalTx(t, pool, []int64{4e6}, []int64{})
	// This is a P2SH address for which the addr manager doesn't have the redeem
	// script.
	addr, _ := btcutil.DecodeAddress("3Hb4xcebcKg4DiETJfwjh8sF4uDw9rqtVC", mgr.ChainParams())
	if _, err := mgr.Address(addr); err == nil {
		t.Fatalf("Address %s found in manager when it shouldn't", addr)
	}
	msgtx := tx.toMsgTx()

	pkScript, _ := txscript.PayToAddrScript(addr.(*btcutil.AddressScriptHash))
	err := signMultiSigUTXO(mgr, msgtx, 0, pkScript, []RawSig{RawSig{}})

	TstCheckError(t, "", err, ErrTxSigning)
}
Example #6
0
// This example demonstrates how to use the Pool.StartWithdrawal method.
func Example_startWithdrawal() {
	// Create the address manager and votingpool DB namespace. See the example
	// for the Create() function for more info on how this is done.
	mgr, vpNamespace, tearDownFunc, err := exampleCreateMgrAndDBNamespace()
	if err != nil {
		fmt.Println(err)
		return
	}
	defer tearDownFunc()

	// Create a pool and a series. See the DepositAddress example for more info
	// on how this is done.
	pool, seriesID, err := exampleCreatePoolAndSeries(mgr, vpNamespace)
	if err != nil {
		fmt.Println(err)
		return
	}

	// Unlock the manager
	if err := mgr.Unlock(privPassphrase); err != nil {
		fmt.Println(err)
		return
	}
	defer mgr.Lock()

	addr, _ := btcutil.DecodeAddress("1MirQ9bwyQcGVJPwKUgapu5ouK2E2Ey4gX", mgr.ChainParams())
	pkScript, _ := txscript.PayToAddrScript(addr)
	requests := []votingpool.OutputRequest{
		votingpool.OutputRequest{
			PkScript:    pkScript,
			Address:     addr,
			Amount:      1e6,
			Server:      "server-id",
			Transaction: 123},
	}
	changeStart, err := pool.ChangeAddress(seriesID, votingpool.Index(0))
	if err != nil {
		fmt.Println(err)
		return
	}
	// This is only needed because we have not used any deposit addresses from
	// the series, and we cannot create a WithdrawalAddress for an unused
	// branch/idx pair.
	if err = pool.EnsureUsedAddr(seriesID, votingpool.Branch(1), votingpool.Index(0)); err != nil {
		fmt.Println(err)
		return
	}
	startAddr, err := pool.WithdrawalAddress(seriesID, votingpool.Branch(1), votingpool.Index(0))
	if err != nil {
		fmt.Println(err)
		return
	}
	lastSeriesID := seriesID
	dustThreshold := btcutil.Amount(1e4)
	currentBlock := int32(19432)
	roundID := uint32(0)
	txstore, tearDownFunc, err := exampleCreateTxStore()
	if err != nil {
		fmt.Println(err)
		return
	}
	_, err = pool.StartWithdrawal(
		roundID, requests, *startAddr, lastSeriesID, *changeStart, txstore, currentBlock,
		dustThreshold)
	if err != nil {
		fmt.Println(err)
	}

	// Output:
	//
}
Example #7
0
// SendCoins attemps to send amt satoshis from the internal mining node to the
// targetted lightning node.
func (n *networkHarness) SendCoins(ctx context.Context, amt btcutil.Amount,
	target *lightningNode) error {

	balReq := &lnrpc.WalletBalanceRequest{}
	initialBalance, err := target.WalletBalance(ctx, balReq)
	if err != nil {
		return err
	}

	// First, obtain an address from the target lightning node, preferring
	// to receive a p2wkh address s.t the output can immediately be used as
	// an input to a funding transaction.
	addrReq := &lnrpc.NewAddressRequest{
		Type: lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH,
	}
	resp, err := target.NewAddress(ctx, addrReq)
	if err != nil {
		return err
	}
	addr, err := btcutil.DecodeAddress(resp.Address, n.netParams)
	if err != nil {
		return err
	}
	addrScript, err := txscript.PayToAddrScript(addr)
	if err != nil {
		return err
	}

	// Generate a transaction which creates an output to the target
	// pkScript of the desired amount.
	output := &wire.TxOut{
		PkScript: addrScript,
		Value:    int64(amt),
	}
	if _, err := n.Miner.CoinbaseSpend([]*wire.TxOut{output}); err != nil {
		return err
	}

	// Finally, generate 6 new blocks to ensure the output gains a
	// sufficient number of confirmations.
	if _, err := n.Miner.Node.Generate(6); err != nil {
		return err
	}

	// Pause until the nodes current wallet balances reflects the amount
	// sent to it above.
	// TODO(roasbeef): factor out into helper func
	for {
		select {
		case <-time.Tick(time.Millisecond * 50):
			currentBal, err := target.WalletBalance(ctx, balReq)
			if err != nil {
				return err
			}

			if currentBal.Balance == initialBalance.Balance+amt.ToBTC() {
				return nil
			}
		case <-time.After(time.Second * 30):
			return fmt.Errorf("balances not synced after deadline")
		}
	}
}
Example #8
0
// SetUp starts the initial seeder nodes within the test harness. The initial
// node's wallets will be funded wallets with ten 1 BTC outputs each. Finally
// rpc clients capable of communicating with the initial seeder nodes are
// created.
func (n *networkHarness) SetUp() error {
	// Swap out grpc's default logger with out fake logger which drops the
	// statements on the floor.
	grpclog.SetLogger(&fakeLogger{})

	// Start the initial seeder nodes within the test network, then connect
	// their respective RPC clients.
	var wg sync.WaitGroup
	errChan := make(chan error, 2)
	wg.Add(2)
	go func() {
		var err error
		defer wg.Done()
		if err = n.Alice.start(n.lndErrorChan); err != nil {
			errChan <- err
			return
		}
	}()
	go func() {
		var err error
		defer wg.Done()
		if err = n.Bob.start(n.lndErrorChan); err != nil {
			errChan <- err
			return
		}
	}()
	wg.Wait()
	select {
	case err := <-errChan:
		return err
	default:
	}

	// Load up the wallets of the seeder nodes with 10 outputs of 1 BTC
	// each.
	ctxb := context.Background()
	addrReq := &lnrpc.NewAddressRequest{lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH}
	clients := []lnrpc.LightningClient{n.Alice, n.Bob}
	for _, client := range clients {
		for i := 0; i < 10; i++ {
			resp, err := client.NewAddress(ctxb, addrReq)
			if err != nil {
				return err
			}
			addr, err := btcutil.DecodeAddress(resp.Address, n.netParams)
			if err != nil {
				return err
			}
			addrScript, err := txscript.PayToAddrScript(addr)
			if err != nil {
				return err
			}

			output := &wire.TxOut{
				PkScript: addrScript,
				Value:    btcutil.SatoshiPerBitcoin,
			}
			if _, err := n.Miner.CoinbaseSpend([]*wire.TxOut{output}); err != nil {
				return err
			}
		}
	}

	// We generate several blocks in order to give the outputs created
	// above a good number of confirmations.
	if _, err := n.Miner.Node.Generate(10); err != nil {
		return err
	}

	// Finally, make a connection between both of the nodes.
	if err := n.ConnectNodes(ctxb, n.Alice, n.Bob); err != nil {
		return err
	}

	// Now block until both wallets have fully synced up.
	expectedBalance := btcutil.Amount(btcutil.SatoshiPerBitcoin * 10).ToBTC()
	balReq := &lnrpc.WalletBalanceRequest{}
	balanceTicker := time.Tick(time.Millisecond * 50)
out:
	for {
		select {
		case <-balanceTicker:
			aliceResp, err := n.Alice.WalletBalance(ctxb, balReq)
			if err != nil {
				return err
			}
			bobResp, err := n.Bob.WalletBalance(ctxb, balReq)
			if err != nil {
				return err
			}

			if aliceResp.Balance == expectedBalance &&
				bobResp.Balance == expectedBalance {
				break out
			}
		case <-time.After(time.Second * 30):
			return fmt.Errorf("balances not synced after deadline")
		}
	}

	// Now that the initial test network has been initialized, launch the
	// network wather.
	go n.networkWatcher()

	return nil
}
Example #9
0
// deserializeWithdrawal deserializes the given byte slice into a dbWithdrawalRow,
// converts it into an withdrawalInfo and returns it. This function must run
// with the address manager unlocked.
func deserializeWithdrawal(p *Pool, serialized []byte) (*withdrawalInfo, error) {
	var row dbWithdrawalRow
	if err := gob.NewDecoder(bytes.NewReader(serialized)).Decode(&row); err != nil {
		return nil, newError(ErrWithdrawalStorage, "cannot deserialize withdrawal information",
			err)
	}
	wInfo := &withdrawalInfo{
		lastSeriesID:  row.LastSeriesID,
		dustThreshold: row.DustThreshold,
	}
	chainParams := p.Manager().ChainParams()
	wInfo.requests = make([]OutputRequest, len(row.Requests))
	// A map of requests indexed by OutBailmentID; needed to populate
	// WithdrawalStatus.Outputs later on.
	requestsByOID := make(map[OutBailmentID]OutputRequest)
	for i, req := range row.Requests {
		addr, err := btcutil.DecodeAddress(req.Addr, chainParams)
		if err != nil {
			return nil, newError(ErrWithdrawalStorage,
				"cannot deserialize addr for requested output", err)
		}
		pkScript, err := txscript.PayToAddrScript(addr)
		if err != nil {
			return nil, newError(ErrWithdrawalStorage, "invalid addr for requested output", err)
		}
		request := OutputRequest{
			Address:     addr,
			Amount:      req.Amount,
			PkScript:    pkScript,
			Server:      req.Server,
			Transaction: req.Transaction,
		}
		wInfo.requests[i] = request
		requestsByOID[request.outBailmentID()] = request
	}
	startAddr := row.StartAddress
	wAddr, err := p.WithdrawalAddress(startAddr.SeriesID, startAddr.Branch, startAddr.Index)
	if err != nil {
		return nil, newError(ErrWithdrawalStorage, "cannot deserialize startAddress", err)
	}
	wInfo.startAddress = *wAddr

	cAddr, err := p.ChangeAddress(row.ChangeStart.SeriesID, row.ChangeStart.Index)
	if err != nil {
		return nil, newError(ErrWithdrawalStorage, "cannot deserialize changeStart", err)
	}
	wInfo.changeStart = *cAddr

	// TODO: Copy over row.Status.nextInputAddr. Not done because StartWithdrawal
	// does not update that yet.
	nextChangeAddr := row.Status.NextChangeAddr
	cAddr, err = p.ChangeAddress(nextChangeAddr.SeriesID, nextChangeAddr.Index)
	if err != nil {
		return nil, newError(ErrWithdrawalStorage,
			"cannot deserialize nextChangeAddress for withdrawal", err)
	}
	wInfo.status = WithdrawalStatus{
		nextChangeAddr: *cAddr,
		fees:           row.Status.Fees,
		outputs:        make(map[OutBailmentID]*WithdrawalOutput, len(row.Status.Outputs)),
		sigs:           row.Status.Sigs,
		transactions:   make(map[Ntxid]changeAwareTx, len(row.Status.Transactions)),
	}
	for oid, output := range row.Status.Outputs {
		outpoints := make([]OutBailmentOutpoint, len(output.Outpoints))
		for i, outpoint := range output.Outpoints {
			outpoints[i] = OutBailmentOutpoint{
				ntxid:  outpoint.Ntxid,
				index:  outpoint.Index,
				amount: outpoint.Amount,
			}
		}
		wInfo.status.outputs[oid] = &WithdrawalOutput{
			request:   requestsByOID[output.OutBailmentID],
			status:    output.Status,
			outpoints: outpoints,
		}
	}
	for ntxid, tx := range row.Status.Transactions {
		msgtx := wire.NewMsgTx()
		if err := msgtx.Deserialize(bytes.NewBuffer(tx.SerializedMsgTx)); err != nil {
			return nil, newError(ErrWithdrawalStorage, "cannot deserialize transaction", err)
		}
		wInfo.status.transactions[ntxid] = changeAwareTx{
			MsgTx:     msgtx,
			changeIdx: tx.ChangeIdx,
		}
	}
	return wInfo, nil
}
Example #10
0
// loadConfig initializes and parses the config using a config file and command
// line options.
//
// The configuration proceeds as follows:
// 	1) Start with a default config with sane settings
// 	2) Pre-parse the command line to check for an alternative config file
// 	3) Load configuration file overwriting defaults with any specified options
// 	4) Parse CLI options and overwrite/add any specified options
//
// The above results in btcd functioning properly without any config settings
// while still allowing the user to override settings with config files and
// command line options.  Command line options always take precedence.
func loadConfig() (*config, []string, error) {
	// Default config.
	cfg := config{
		ConfigFile:           defaultConfigFile,
		DebugLevel:           defaultLogLevel,
		MaxPeers:             defaultMaxPeers,
		BanDuration:          defaultBanDuration,
		BanThreshold:         defaultBanThreshold,
		RPCMaxClients:        defaultMaxRPCClients,
		RPCMaxWebsockets:     defaultMaxRPCWebsockets,
		RPCMaxConcurrentReqs: defaultMaxRPCConcurrentReqs,
		DataDir:              defaultDataDir,
		LogDir:               defaultLogDir,
		DbType:               defaultDbType,
		RPCKey:               defaultRPCKeyFile,
		RPCCert:              defaultRPCCertFile,
		MinRelayTxFee:        mempool.DefaultMinRelayTxFee.ToBTC(),
		FreeTxRelayLimit:     defaultFreeTxRelayLimit,
		BlockMinSize:         defaultBlockMinSize,
		BlockMaxSize:         defaultBlockMaxSize,
		BlockMinWeight:       defaultBlockMinWeight,
		BlockMaxWeight:       defaultBlockMaxWeight,
		BlockPrioritySize:    mempool.DefaultBlockPrioritySize,
		MaxOrphanTxs:         defaultMaxOrphanTransactions,
		SigCacheMaxSize:      defaultSigCacheMaxSize,
		Generate:             defaultGenerate,
		TxIndex:              defaultTxIndex,
		AddrIndex:            defaultAddrIndex,
	}

	// Service options which are only added on Windows.
	serviceOpts := serviceOptions{}

	// Pre-parse the command line options to see if an alternative config
	// file or the version flag was specified.  Any errors aside from the
	// help message error can be ignored here since they will be caught by
	// the final parse below.
	preCfg := cfg
	preParser := newConfigParser(&preCfg, &serviceOpts, flags.HelpFlag)
	_, err := preParser.Parse()
	if err != nil {
		if e, ok := err.(*flags.Error); ok && e.Type == flags.ErrHelp {
			fmt.Fprintln(os.Stderr, err)
			return nil, nil, err
		}
	}

	// Show the version and exit if the version flag was specified.
	appName := filepath.Base(os.Args[0])
	appName = strings.TrimSuffix(appName, filepath.Ext(appName))
	usageMessage := fmt.Sprintf("Use %s -h to show usage", appName)
	if preCfg.ShowVersion {
		fmt.Println(appName, "version", version())
		os.Exit(0)
	}

	// Perform service command and exit if specified.  Invalid service
	// commands show an appropriate error.  Only runs on Windows since
	// the runServiceCommand function will be nil when not on Windows.
	if serviceOpts.ServiceCommand != "" && runServiceCommand != nil {
		err := runServiceCommand(serviceOpts.ServiceCommand)
		if err != nil {
			fmt.Fprintln(os.Stderr, err)
		}
		os.Exit(0)
	}

	// Load additional config from file.
	var configFileError error
	parser := newConfigParser(&cfg, &serviceOpts, flags.Default)
	if !(preCfg.RegressionTest || preCfg.SimNet) || preCfg.ConfigFile !=
		defaultConfigFile {

		if _, err := os.Stat(preCfg.ConfigFile); os.IsNotExist(err) {
			err := createDefaultConfigFile(preCfg.ConfigFile)
			if err != nil {
				fmt.Fprintf(os.Stderr, "Error creating a "+
					"default config file: %v\n", err)
			}
		}

		err := flags.NewIniParser(parser).ParseFile(preCfg.ConfigFile)
		if err != nil {
			if _, ok := err.(*os.PathError); !ok {
				fmt.Fprintf(os.Stderr, "Error parsing config "+
					"file: %v\n", err)
				fmt.Fprintln(os.Stderr, usageMessage)
				return nil, nil, err
			}
			configFileError = err
		}
	}

	// Don't add peers from the config file when in regression test mode.
	if preCfg.RegressionTest && len(cfg.AddPeers) > 0 {
		cfg.AddPeers = nil
	}

	// Parse command line options again to ensure they take precedence.
	remainingArgs, err := parser.Parse()
	if err != nil {
		if e, ok := err.(*flags.Error); !ok || e.Type != flags.ErrHelp {
			fmt.Fprintln(os.Stderr, usageMessage)
		}
		return nil, nil, err
	}

	// Create the home directory if it doesn't already exist.
	funcName := "loadConfig"
	err = os.MkdirAll(defaultHomeDir, 0700)
	if err != nil {
		// Show a nicer error message if it's because a symlink is
		// linked to a directory that does not exist (probably because
		// it's not mounted).
		if e, ok := err.(*os.PathError); ok && os.IsExist(err) {
			if link, lerr := os.Readlink(e.Path); lerr == nil {
				str := "is symlink %s -> %s mounted?"
				err = fmt.Errorf(str, e.Path, link)
			}
		}

		str := "%s: Failed to create home directory: %v"
		err := fmt.Errorf(str, funcName, err)
		fmt.Fprintln(os.Stderr, err)
		return nil, nil, err
	}

	// Multiple networks can't be selected simultaneously.
	numNets := 0
	// Count number of network flags passed; assign active network params
	// while we're at it
	if cfg.TestNet3 {
		numNets++
		activeNetParams = &testNet3Params
	}
	if cfg.RegressionTest {
		numNets++
		activeNetParams = &regressionNetParams
	}
	if cfg.SimNet {
		numNets++
		// Also disable dns seeding on the simulation test network.
		activeNetParams = &simNetParams
		cfg.DisableDNSSeed = true
	}
	if numNets > 1 {
		str := "%s: The testnet, regtest, segnet, and simnet params " +
			"can't be used together -- choose one of the four"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Set the default policy for relaying non-standard transactions
	// according to the default of the active network. The set
	// configuration value takes precedence over the default value for the
	// selected network.
	relayNonStd := activeNetParams.RelayNonStdTxs
	switch {
	case cfg.RelayNonStd && cfg.RejectNonStd:
		str := "%s: rejectnonstd and relaynonstd cannot be used " +
			"together -- choose only one"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	case cfg.RejectNonStd:
		relayNonStd = false
	case cfg.RelayNonStd:
		relayNonStd = true
	}
	cfg.RelayNonStd = relayNonStd

	// Append the network type to the data directory so it is "namespaced"
	// per network.  In addition to the block database, there are other
	// pieces of data that are saved to disk such as address manager state.
	// All data is specific to a network, so namespacing the data directory
	// means each individual piece of serialized data does not have to
	// worry about changing names per network and such.
	cfg.DataDir = cleanAndExpandPath(cfg.DataDir)
	cfg.DataDir = filepath.Join(cfg.DataDir, netName(activeNetParams))

	// Append the network type to the log directory so it is "namespaced"
	// per network in the same fashion as the data directory.
	cfg.LogDir = cleanAndExpandPath(cfg.LogDir)
	cfg.LogDir = filepath.Join(cfg.LogDir, netName(activeNetParams))

	// Special show command to list supported subsystems and exit.
	if cfg.DebugLevel == "show" {
		fmt.Println("Supported subsystems", supportedSubsystems())
		os.Exit(0)
	}

	// Initialize logging at the default logging level.
	initSeelogLogger(filepath.Join(cfg.LogDir, defaultLogFilename))
	setLogLevels(defaultLogLevel)

	// Parse, validate, and set debug log level(s).
	if err := parseAndSetDebugLevels(cfg.DebugLevel); err != nil {
		err := fmt.Errorf("%s: %v", funcName, err.Error())
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Validate database type.
	if !validDbType(cfg.DbType) {
		str := "%s: The specified database type [%v] is invalid -- " +
			"supported types %v"
		err := fmt.Errorf(str, funcName, cfg.DbType, knownDbTypes)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Validate profile port number
	if cfg.Profile != "" {
		profilePort, err := strconv.Atoi(cfg.Profile)
		if err != nil || profilePort < 1024 || profilePort > 65535 {
			str := "%s: The profile port must be between 1024 and 65535"
			err := fmt.Errorf(str, funcName)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}
	}

	// Don't allow ban durations that are too short.
	if cfg.BanDuration < time.Second {
		str := "%s: The banduration option may not be less than 1s -- parsed [%v]"
		err := fmt.Errorf(str, funcName, cfg.BanDuration)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// --addPeer and --connect do not mix.
	if len(cfg.AddPeers) > 0 && len(cfg.ConnectPeers) > 0 {
		str := "%s: the --addpeer and --connect options can not be " +
			"mixed"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// --proxy or --connect without --listen disables listening.
	if (cfg.Proxy != "" || len(cfg.ConnectPeers) > 0) &&
		len(cfg.Listeners) == 0 {
		cfg.DisableListen = true
	}

	// Connect means no DNS seeding.
	if len(cfg.ConnectPeers) > 0 {
		cfg.DisableDNSSeed = true
	}

	// Add the default listener if none were specified. The default
	// listener is all addresses on the listen port for the network
	// we are to connect to.
	if len(cfg.Listeners) == 0 {
		cfg.Listeners = []string{
			net.JoinHostPort("", activeNetParams.DefaultPort),
		}
	}

	// Check to make sure limited and admin users don't have the same username
	if cfg.RPCUser == cfg.RPCLimitUser && cfg.RPCUser != "" {
		str := "%s: --rpcuser and --rpclimituser must not specify the " +
			"same username"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Check to make sure limited and admin users don't have the same password
	if cfg.RPCPass == cfg.RPCLimitPass && cfg.RPCPass != "" {
		str := "%s: --rpcpass and --rpclimitpass must not specify the " +
			"same password"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// The RPC server is disabled if no username or password is provided.
	if (cfg.RPCUser == "" || cfg.RPCPass == "") &&
		(cfg.RPCLimitUser == "" || cfg.RPCLimitPass == "") {
		cfg.DisableRPC = true
	}

	// Default RPC to listen on localhost only.
	if !cfg.DisableRPC && len(cfg.RPCListeners) == 0 {
		addrs, err := net.LookupHost("localhost")
		if err != nil {
			return nil, nil, err
		}
		cfg.RPCListeners = make([]string, 0, len(addrs))
		for _, addr := range addrs {
			addr = net.JoinHostPort(addr, activeNetParams.rpcPort)
			cfg.RPCListeners = append(cfg.RPCListeners, addr)
		}
	}

	if cfg.RPCMaxConcurrentReqs < 0 {
		str := "%s: The rpcmaxwebsocketconcurrentrequests option may " +
			"not be less than 0 -- parsed [%d]"
		err := fmt.Errorf(str, funcName, cfg.RPCMaxConcurrentReqs)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Validate the the minrelaytxfee.
	cfg.minRelayTxFee, err = btcutil.NewAmount(cfg.MinRelayTxFee)
	if err != nil {
		str := "%s: invalid minrelaytxfee: %v"
		err := fmt.Errorf(str, funcName, err)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Limit the max block size to a sane value.
	if cfg.BlockMaxSize < blockMaxSizeMin || cfg.BlockMaxSize >
		blockMaxSizeMax {

		str := "%s: The blockmaxsize option must be in between %d " +
			"and %d -- parsed [%d]"
		err := fmt.Errorf(str, funcName, blockMaxSizeMin,
			blockMaxSizeMax, cfg.BlockMaxSize)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Limit the max block weight to a sane value.
	if cfg.BlockMaxWeight < blockMaxWeightMin ||
		cfg.BlockMaxWeight > blockMaxWeightMax {

		str := "%s: The blockmaxweight option must be in between %d " +
			"and %d -- parsed [%d]"
		err := fmt.Errorf(str, funcName, blockMaxWeightMin,
			blockMaxWeightMax, cfg.BlockMaxWeight)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Limit the max orphan count to a sane vlue.
	if cfg.MaxOrphanTxs < 0 {
		str := "%s: The maxorphantx option may not be less than 0 " +
			"-- parsed [%d]"
		err := fmt.Errorf(str, funcName, cfg.MaxOrphanTxs)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Limit the block priority and minimum block sizes to max block size.
	cfg.BlockPrioritySize = minUint32(cfg.BlockPrioritySize, cfg.BlockMaxSize)
	cfg.BlockMinSize = minUint32(cfg.BlockMinSize, cfg.BlockMaxSize)
	cfg.BlockMinWeight = minUint32(cfg.BlockMinWeight, cfg.BlockMaxWeight)

	// TODO(roasbeef): need to do multi-dimensional limiting based on if
	// both weight AND size are set, or just one.

	// --txindex and --droptxindex do not mix.
	if cfg.TxIndex && cfg.DropTxIndex {
		err := fmt.Errorf("%s: the --txindex and --droptxindex "+
			"options may  not be activated at the same time",
			funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// --addrindex and --dropaddrindex do not mix.
	if cfg.AddrIndex && cfg.DropAddrIndex {
		err := fmt.Errorf("%s: the --addrindex and --dropaddrindex "+
			"options may not be activated at the same time",
			funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// --addrindex and --droptxindex do not mix.
	if cfg.AddrIndex && cfg.DropTxIndex {
		err := fmt.Errorf("%s: the --addrindex and --droptxindex "+
			"options may not be activated at the same time "+
			"because the address index relies on the transaction "+
			"index",
			funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Check getwork keys are valid and saved parsed versions.
	cfg.miningAddrs = make([]btcutil.Address, 0, len(cfg.GetWorkKeys)+
		len(cfg.MiningAddrs))
	for _, strAddr := range cfg.GetWorkKeys {
		addr, err := btcutil.DecodeAddress(strAddr,
			activeNetParams.Params)
		if err != nil {
			str := "%s: getworkkey '%s' failed to decode: %v"
			err := fmt.Errorf(str, funcName, strAddr, err)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}
		if !addr.IsForNet(activeNetParams.Params) {
			str := "%s: getworkkey '%s' is on the wrong network"
			err := fmt.Errorf(str, funcName, strAddr)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}
		cfg.miningAddrs = append(cfg.miningAddrs, addr)
	}

	// Check mining addresses are valid and saved parsed versions.
	for _, strAddr := range cfg.MiningAddrs {
		addr, err := btcutil.DecodeAddress(strAddr, activeNetParams.Params)
		if err != nil {
			str := "%s: mining address '%s' failed to decode: %v"
			err := fmt.Errorf(str, funcName, strAddr, err)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}
		if !addr.IsForNet(activeNetParams.Params) {
			str := "%s: mining address '%s' is on the wrong network"
			err := fmt.Errorf(str, funcName, strAddr)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}
		cfg.miningAddrs = append(cfg.miningAddrs, addr)
	}

	// Ensure there is at least one mining address when the generate flag is
	// set.
	if cfg.Generate && len(cfg.MiningAddrs) == 0 {
		str := "%s: the generate flag is set, but there are no mining " +
			"addresses specified "
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Add default port to all listener addresses if needed and remove
	// duplicate addresses.
	cfg.Listeners = normalizeAddresses(cfg.Listeners,
		activeNetParams.DefaultPort)

	// Add default port to all rpc listener addresses if needed and remove
	// duplicate addresses.
	cfg.RPCListeners = normalizeAddresses(cfg.RPCListeners,
		activeNetParams.rpcPort)

	// Only allow TLS to be disabled if the RPC is bound to localhost
	// addresses.
	if !cfg.DisableRPC && cfg.DisableTLS {
		allowedTLSListeners := map[string]struct{}{
			"localhost": {},
			"127.0.0.1": {},
			"::1":       {},
		}
		for _, addr := range cfg.RPCListeners {
			host, _, err := net.SplitHostPort(addr)
			if err != nil {
				str := "%s: RPC listen interface '%s' is " +
					"invalid: %v"
				err := fmt.Errorf(str, funcName, addr, err)
				fmt.Fprintln(os.Stderr, err)
				fmt.Fprintln(os.Stderr, usageMessage)
				return nil, nil, err
			}
			if _, ok := allowedTLSListeners[host]; !ok {
				str := "%s: the --notls option may not be used " +
					"when binding RPC to non localhost " +
					"addresses: %s"
				err := fmt.Errorf(str, funcName, addr)
				fmt.Fprintln(os.Stderr, err)
				fmt.Fprintln(os.Stderr, usageMessage)
				return nil, nil, err
			}
		}
	}

	// Add default port to all added peer addresses if needed and remove
	// duplicate addresses.
	cfg.AddPeers = normalizeAddresses(cfg.AddPeers,
		activeNetParams.DefaultPort)
	cfg.ConnectPeers = normalizeAddresses(cfg.ConnectPeers,
		activeNetParams.DefaultPort)

	// Tor stream isolation requires either proxy or onion proxy to be set.
	if cfg.TorIsolation && cfg.Proxy == "" && cfg.OnionProxy == "" {
		str := "%s: Tor stream isolation requires either proxy or " +
			"onionproxy to be set"
		err := fmt.Errorf(str, funcName)
		fmt.Fprintln(os.Stderr, err)
		fmt.Fprintln(os.Stderr, usageMessage)
		return nil, nil, err
	}

	// Setup dial and DNS resolution (lookup) functions depending on the
	// specified options.  The default is to use the standard net.Dial
	// function as well as the system DNS resolver.  When a proxy is
	// specified, the dial function is set to the proxy specific dial
	// function and the lookup is set to use tor (unless --noonion is
	// specified in which case the system DNS resolver is used).
	cfg.dial = net.Dial
	cfg.lookup = net.LookupIP
	if cfg.Proxy != "" {
		_, _, err := net.SplitHostPort(cfg.Proxy)
		if err != nil {
			str := "%s: Proxy address '%s' is invalid: %v"
			err := fmt.Errorf(str, funcName, cfg.Proxy, err)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}

		if cfg.TorIsolation &&
			(cfg.ProxyUser != "" || cfg.ProxyPass != "") {
			fmt.Fprintln(os.Stderr, "Tor isolation set -- "+
				"overriding specified proxy user credentials")
		}

		proxy := &socks.Proxy{
			Addr:         cfg.Proxy,
			Username:     cfg.ProxyUser,
			Password:     cfg.ProxyPass,
			TorIsolation: cfg.TorIsolation,
		}
		cfg.dial = proxy.Dial
		if !cfg.NoOnion {
			cfg.lookup = func(host string) ([]net.IP, error) {
				return connmgr.TorLookupIP(host, cfg.Proxy)
			}
		}
	}

	// Setup onion address dial and DNS resolution (lookup) functions
	// depending on the specified options.  The default is to use the
	// same dial and lookup functions selected above.  However, when an
	// onion-specific proxy is specified, the onion address dial and
	// lookup functions are set to use the onion-specific proxy while
	// leaving the normal dial and lookup functions as selected above.
	// This allows .onion address traffic to be routed through a different
	// proxy than normal traffic.
	if cfg.OnionProxy != "" {
		_, _, err := net.SplitHostPort(cfg.OnionProxy)
		if err != nil {
			str := "%s: Onion proxy address '%s' is invalid: %v"
			err := fmt.Errorf(str, funcName, cfg.OnionProxy, err)
			fmt.Fprintln(os.Stderr, err)
			fmt.Fprintln(os.Stderr, usageMessage)
			return nil, nil, err
		}

		if cfg.TorIsolation &&
			(cfg.OnionProxyUser != "" || cfg.OnionProxyPass != "") {
			fmt.Fprintln(os.Stderr, "Tor isolation set -- "+
				"overriding specified onionproxy user "+
				"credentials ")
		}

		cfg.oniondial = func(a, b string) (net.Conn, error) {
			proxy := &socks.Proxy{
				Addr:         cfg.OnionProxy,
				Username:     cfg.OnionProxyUser,
				Password:     cfg.OnionProxyPass,
				TorIsolation: cfg.TorIsolation,
			}
			return proxy.Dial(a, b)
		}
		cfg.onionlookup = func(host string) ([]net.IP, error) {
			return connmgr.TorLookupIP(host, cfg.OnionProxy)
		}
	} else {
		cfg.oniondial = cfg.dial
		cfg.onionlookup = cfg.lookup
	}

	// Specifying --noonion means the onion address dial and DNS resolution
	// (lookup) functions result in an error.
	if cfg.NoOnion {
		cfg.oniondial = func(a, b string) (net.Conn, error) {
			return nil, errors.New("tor has been disabled")
		}
		cfg.onionlookup = func(a string) ([]net.IP, error) {
			return nil, errors.New("tor has been disabled")
		}
	}

	// Warn about missing config file only after all other configuration is
	// done.  This prevents the warning on help messages and invalid
	// options.  Note this should go directly before the return.
	if configFileError != nil {
		btcdLog.Warnf("%v", configFileError)
	}

	return &cfg, remainingArgs, nil
}