Example #1
0
// New returns a new BtcdNotifier instance. This function assumes the btcd node
// detailed in the passed configuration is already running, and
// willing to accept new websockets clients.
func New(config *btcrpcclient.ConnConfig) (*BtcdNotifier, error) {
	notifier := &BtcdNotifier{
		notificationRegistry: make(chan interface{}),

		spendNotifications: make(map[wire.OutPoint]*spendNotification),
		confNotifications:  make(map[wire.ShaHash][]*confirmationsNotification),
		confHeap:           newConfirmationHeap(),

		disconnectedBlockHashes: make(chan *blockNtfn, 20),

		chainUpdateSignal: make(chan struct{}),
		txUpdateSignal:    make(chan struct{}),

		quit: make(chan struct{}),
	}

	ntfnCallbacks := &btcrpcclient.NotificationHandlers{
		OnBlockConnected:    notifier.onBlockConnected,
		OnBlockDisconnected: notifier.onBlockDisconnected,
		OnRedeemingTx:       notifier.onRedeemingTx,
	}

	// Disable connecting to btcd within the btcrpcclient.New method. We
	// defer establishing the connection to our .Start() method.
	config.DisableConnectOnNew = true
	config.DisableAutoReconnect = false
	chainConn, err := btcrpcclient.New(config, ntfnCallbacks)
	if err != nil {
		return nil, err
	}
	notifier.chainConn = chainConn

	return notifier, nil
}
Example #2
0
// NewRPCClient creates a client connection to the server described by the
// connect string.  If disableTLS is false, the remote RPC certificate must be
// provided in the certs slice.  The connection is not established immediately,
// but must be done using the Start method.  If the remote server does not
// operate on the same bitcoin network as described by the passed chain
// parameters, the connection will be disconnected.
func NewRPCClient(chainParams *chaincfg.Params, connect, user, pass string, certs []byte,
	disableTLS bool, reconnectAttempts int) (*RPCClient, error) {

	if reconnectAttempts < 0 {
		return nil, errors.New("reconnectAttempts must be positive")
	}

	client := &RPCClient{
		connConfig: &btcrpcclient.ConnConfig{
			Host:                 connect,
			Endpoint:             "ws",
			User:                 user,
			Pass:                 pass,
			Certificates:         certs,
			DisableAutoReconnect: true,
			DisableConnectOnNew:  true,
			DisableTLS:           disableTLS,
		},
		chainParams:         chainParams,
		reconnectAttempts:   reconnectAttempts,
		enqueueNotification: make(chan interface{}),
		dequeueNotification: make(chan interface{}),
		currentBlock:        make(chan *waddrmgr.BlockStamp),
		quit:                make(chan struct{}),
	}
	ntfnCallbacks := &btcrpcclient.NotificationHandlers{
		OnClientConnected:   client.onClientConnect,
		OnBlockConnected:    client.onBlockConnected,
		OnBlockDisconnected: client.onBlockDisconnected,
		OnRecvTx:            client.onRecvTx,
		OnRedeemingTx:       client.onRedeemingTx,
		OnRescanFinished:    client.onRescanFinished,
		OnRescanProgress:    client.onRescanProgress,
	}
	rpcClient, err := btcrpcclient.New(client.connConfig, ntfnCallbacks)
	if err != nil {
		return nil, err
	}
	client.Client = rpcClient
	return client, nil
}
Example #3
0
// connectRPCClient attempts to establish an RPC connection to the created btcd
// process belonging to this Harness instance. If the initial connection
// attempt fails, this function will retry h.maxConnRetries times, backing off
// the time between subsequent attempts. If after h.maxConnRetries attempts,
// we're not able to establish a connection, this function returns with an
// error.
func (h *Harness) connectRPCClient() error {
	var client *btcrpcclient.Client
	var err error

	rpcConf := h.node.config.rpcConnConfig()
	for i := 0; i < h.maxConnRetries; i++ {
		if client, err = btcrpcclient.New(&rpcConf, h.handlers); err != nil {
			time.Sleep(time.Duration(i) * 50 * time.Millisecond)
			continue
		}
		break
	}

	if client == nil {
		return fmt.Errorf("connection timeout")
	}

	h.Node = client
	h.wallet.SetRPCClient(client)
	return nil
}
Example #4
0
func sweep() error {
	rpcPassword, err := promptSecret("Wallet RPC password")
	if err != nil {
		return errContext(err, "failed to read RPC password")
	}

	// Open RPC client.
	rpcCertificate, err := ioutil.ReadFile(opts.RPCCertificateFile)
	if err != nil {
		return errContext(err, "failed to read RPC certificate")
	}
	rpcClient, err := btcrpcclient.New(&btcrpcclient.ConnConfig{
		Host:         opts.RPCConnect,
		User:         opts.RPCUsername,
		Pass:         rpcPassword,
		Certificates: rpcCertificate,
		HTTPPostMode: true,
	}, nil)
	if err != nil {
		return errContext(err, "failed to create RPC client")
	}
	defer rpcClient.Shutdown()

	// Fetch all unspent outputs, ignore those not from the source
	// account, and group by their destination address.  Each grouping of
	// outputs will be used as inputs for a single transaction sending to a
	// new destination account address.
	unspentOutputs, err := rpcClient.ListUnspent()
	if err != nil {
		return errContext(err, "failed to fetch unspent outputs")
	}
	sourceOutputs := make(map[string][]btcjson.ListUnspentResult)
	for _, unspentOutput := range unspentOutputs {
		if !unspentOutput.Spendable {
			continue
		}
		if unspentOutput.Confirmations < opts.RequiredConfirmations {
			continue
		}
		if unspentOutput.Account != opts.SourceAccount {
			continue
		}
		sourceAddressOutputs := sourceOutputs[unspentOutput.Address]
		sourceOutputs[unspentOutput.Address] = append(sourceAddressOutputs, unspentOutput)
	}

	var privatePassphrase string
	if len(sourceOutputs) != 0 {
		privatePassphrase, err = promptSecret("Wallet private passphrase")
		if err != nil {
			return errContext(err, "failed to read private passphrase")
		}
	}

	var totalSwept btcutil.Amount
	var numErrors int
	var reportError = func(format string, args ...interface{}) {
		fmt.Fprintf(os.Stderr, format, args...)
		os.Stderr.Write(newlineBytes)
		numErrors++
	}
	for _, previousOutputs := range sourceOutputs {
		inputSource := makeInputSource(previousOutputs)
		destinationSource := makeDestinationScriptSource(rpcClient, opts.DestinationAccount)
		tx, err := txauthor.NewUnsignedTransaction(nil, opts.FeeRate.Amount,
			inputSource, destinationSource)
		if err != nil {
			if err != (noInputValue{}) {
				reportError("Failed to create unsigned transaction: %v", err)
			}
			continue
		}

		// Unlock the wallet, sign the transaction, and immediately lock.
		err = rpcClient.WalletPassphrase(privatePassphrase, 60)
		if err != nil {
			reportError("Failed to unlock wallet: %v", err)
			continue
		}
		signedTransaction, complete, err := rpcClient.SignRawTransaction(tx.Tx)
		_ = rpcClient.WalletLock()
		if err != nil {
			reportError("Failed to sign transaction: %v", err)
			continue
		}
		if !complete {
			reportError("Failed to sign every input")
			continue
		}

		// Publish the signed sweep transaction.
		txHash, err := rpcClient.SendRawTransaction(signedTransaction, false)
		if err != nil {
			reportError("Failed to publish transaction: %v", err)
			continue
		}

		outputAmount := btcutil.Amount(tx.Tx.TxOut[0].Value)
		fmt.Printf("Swept %v to destination account with transaction %v\n",
			outputAmount, txHash)
		totalSwept += outputAmount
	}

	numPublished := len(sourceOutputs) - numErrors
	transactionNoun := pickNoun(numErrors, "transaction", "transactions")
	if numPublished != 0 {
		fmt.Printf("Swept %v to destination account across %d %s\n",
			totalSwept, numPublished, transactionNoun)
	}
	if numErrors > 0 {
		return fmt.Errorf("Failed to publish %d %s", numErrors, transactionNoun)
	}

	return nil
}
Example #5
0
// POSTClient creates the equivalent HTTP POST btcrpcclient.Client.
func (c *RPCClient) POSTClient() (*btcrpcclient.Client, error) {
	configCopy := *c.connConfig
	configCopy.HTTPPostMode = true
	return btcrpcclient.New(&configCopy, nil)
}